JP2011017733A - Hand position detector and method for controlling hand position detection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand position detector capable of preventing battery drain due to hand position detection in a non-use state.SOLUTION: In the hand position detector, a solar panel 9 which is a dark-light determination means determines that a wrist watch is put in a dark state; and when the dark state continues for a predetermined period of time, for example, 61-70 minutes, a dark state detection means (CPU 35, steps S120-S124) determines that the wrist watch is in a sleep state. When it is determined that the watch is in this sleep state, at least a second hand 2 among the second hand 2, a minute hand 3 and an hour hand 4 is moved to a reference position (00-second position) and are stopped there by the control of a hand movement stop control means (CPU 35, steps S124-S135); and in this state, the positions of the minute hand 3 and the hour hand 4 are detected by a hand position detection means (CPU 35, steps S35-S87). Thus, when the wrist watch is not used, hand position detection is simplified to prevent battery drain due to hand position detection.

Description

  The present invention relates to a hand position detection device and a hand position detection control method for detecting the moving position of a pointer such as a second hand, a minute hand, and an hour hand.

  2. Description of the Related Art Conventionally, in a hand position detection device for a pointer clock, as described in Patent Document 1, a first drive system that moves a second hand by a second hand wheel that rotates by transmitting the rotation of a first drive motor, The second drive system that moves the minute hand and hour hand respectively by the minute hand wheel and hour hand wheel that are transmitted by the rotation of the drive motor, respectively, and the second hand wheel, the minute hand wheel, and the hour hand wheel of the first and second drive systems are the same. A detection unit that optically detects the first to third light transmission holes provided in the second hand wheel, the minute hand wheel, and the hour hand wheel by the light emitting element and the light receiving element when rotating in an overlapping state on the shaft. And is configured to determine the rotational positions of the second hand, the minute hand wheel, and the hour hand wheel based on the detection signal from the detection unit, and to determine the moving position of the second hand, the minute hand, and the hour hand. Yes.

JP 2000-162336 A

  However, such a conventional hand position detecting device only determines the second hand, minute hand, and hour hand moving positions. Therefore, when it is determined that the second hand, minute hand, and hour hand are moving correctly, the normal hand movement is performed as it is. However, there is a problem in that the battery is consumed very much because the position detection of the second hand, the minute hand, and the hour hand is repeated many times even in a non-use state where it is left in a dark place for a long time.

  The problem to be solved by the present invention is to provide a needle position detection device and a needle position detection control method capable of preventing battery consumption due to needle position detection when not in use.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, there is provided a light detection means for detecting transmission and non-transmission of light with respect to each light transmission hole portion of a plurality of pointer wheels each having a pointer attached thereto, and light detected by the light detection means. The needle position detecting means for detecting the position of the pointer based on the transmission / non-transmission state, the light / dark determination means for determining whether or not the outside is in a dark state, and the outside is in a dark state by the light / dark determination means. A dark state detecting means for determining whether or not the dark state has continued for a predetermined time, and the dark state detecting means determines that the dark state has continued for a predetermined time. At least a specific pointer in the pointer is moved to a reference position and stopped, and needle movement is controlled so that the positions of the plurality of pointers are detected by the needle position detecting means at a predetermined time in the stopped state. It is the hand position detecting device according to claim that a stop control means.

  According to a second aspect of the present invention, the positions of the plurality of hands cannot be detected by the needle position detecting means in a state where the specific hands are stopped at the reference position by the control of the needle movement stop control means. In this case, when the number of times the detection could not be performed continues for a predetermined number of times, the needle position for stopping the detection of the position of the pointer by the needle position detecting means until a predetermined time is reached. The needle position detecting device according to claim 1, further comprising a detection stop control means.

  According to a third aspect of the present invention, when the dark state is determined to be dark by the dark state detection means and the dark state continues for a period longer than the predetermined time, the plurality of pointers are displayed. The needle position detecting device according to claim 1 or 2, further comprising long-term needle movement stop control means for stopping the movement for a long period of time from the time when the needle is moved to the reference position until the start of use.

The invention according to claim 4
Based on the light detection means for detecting the transmission and non-transmission of light to the light transmission hole portions of the plurality of pointer wheels to which the pointers are respectively attached, and the light transmission and non-transmission states detected by the light detection means In a needle position detection control method used in a needle position detection device comprising needle position detection means for detecting the position of the pointer,
A light / dark determination step for determining whether or not the outside is in a dark state;
A dark state detecting step of determining whether or not the outside is in a dark state by the light and dark determination step, and determining whether or not the dark state has continued for a predetermined time;
When it is determined by the dark state detection step that the dark state has continued for a predetermined time, at least a specific pointer in the plurality of pointers is moved to a reference position and stopped, and at each predetermined time in the stopped state And a needle movement stop control step for controlling the positions of the plurality of hands so as to be detected by the needle position detecting means.

The invention described in claim 5
When the position of the plurality of hands cannot be detected by the needle position detecting means in a state where the specific pointer is stopped at the reference position by the control of the needle movement stop control step, the number of times that the hands cannot be detected. A needle position detection stop control step for stopping the detection of the position of the pointer by the needle position detection means for a predetermined time when the predetermined number of times continues for a predetermined number of times. The needle position detection control method according to claim 4.
The invention described in claim 6
After the dark state is determined to be dark by the dark state detection step, when the dark state continues for a period longer than the predetermined time, the plurality of hands are moved to the reference position for use. The needle position detection control method according to claim 4 or 5, further comprising a long-term needle movement stop control step for stopping for a long period of time before starting.

  According to this invention, when it is determined that the outside is in a dark state by the light / dark determination means or the light / dark determination step, and it is determined that the dark state has continued for a predetermined time by the dark state detection means or the dark state detection step. The needle movement detection control means or the needle movement stop control step controls to move at least a specific pointer to the reference position and stop it. In this state, the needle position is detected when not in use. This simplifies and prevents battery consumption due to needle position detection.

It is the top view which showed the timepiece module in one Embodiment of the pointer type wristwatch to which this invention is applied. FIG. 2 is an enlarged cross-sectional view showing a main part of the timepiece module of FIG. 1. FIG. 3 is an enlarged plan view showing a main part of the timepiece movement of FIG. 2. It is the expanded sectional view which showed the principal part of FIG. It is the enlarged plan view which decomposed | disassembled the second hand wheel of FIG. 3, a minute hand wheel, and an hour hand wheel. FIG. 3 is a table showing the number of teeth of each gear, the rotation angle of one pulse, the number of pulses of one rotation, and the presence or absence of a light detection hole in the first drive system and the second drive system of FIG. 2. FIG. 6 is an enlarged plan view showing the second hand wheel of FIG. 5. It is the figure which showed the detection pattern by the detection part with respect to the second hand wheel of FIG. FIG. 6 is an enlarged plan view showing the hour hand wheel of FIG. 5. The basic position detection operation of the second hand wheel of FIG. 7 is shown, and (a) to (m) show the respective states when the second hand wheel is rotated by two steps (12 °) from the reference position (00 second position). It is a figure. 5 shows basic position detection operations of the minute hand wheel, hour hand wheel, and intermediate wheel of FIG. 5, wherein (a) to (m) are a minute hand wheel, hour hand wheel when the minute hand wheel is rotated by one step (12 °), The figure which showed each state of an intermediate wheel, (n) is a figure of each state of a minute hand wheel, an hour hand wheel, and an intermediate wheel when a minute hand wheel is rotated 360 steps (one hour) from the state of (m). o) is a diagram of each state of the minute hand wheel, hour hand wheel and intermediate wheel when the minute hand wheel is rotated for nine hours from the state of (n), and (p) is one minute of minute hand wheel from the state of (o). It is a figure showing each state of a minute hand wheel, an hour hand wheel, and an intermediate wheel in the rotated “11:00 position”. In FIG. 5, the position detection operation of only the second hand wheel is shown, and (a) to (f) are diagrams showing respective states when the second hand wheel shifted from the reference position is moved to the reference position. FIG. 5 shows the position detection operation of the minute hand wheel and the hour hand wheel, and (a) to (f) are diagrams showing respective states when the minute hand wheel and the hour hand wheel that are shifted from the reference position are moved to the reference position. is there. FIG. 5 shows a basic position detection operation when the second hand wheel, the minute hand wheel, and the hour hand wheel are deviated from the reference position, and (a) to (f) show the second hand wheel, the minute hand wheel, and the hour hand that are deviated from the reference position. It is the figure which showed each state at the time of moving a vehicle to a reference position. The hand position confirmation operation for confirming whether the second hand, the minute hand, and the hour hand are aligned at the correct hour during normal hand movement is shown. (A) to (f) are 2 seconds for the second hand, minute hand, and hour hand wheel. It is the figure which showed each operation state in every. FIG. 6 is an enlarged plan view showing the amount of movement of the second light transmitting hole portion of the minute hand wheel relative to the detection position of the detection portion when the minute hand wheel of FIG. 5 rotates by one step (1 °). It is the block diagram which showed the circuit structure of the wristwatch of this embodiment. It is the figure which showed the operation | movement flow of the basic second hand position detection process which moves a second hand to a reference position. It is the figure which showed the operation | movement flow of the basic minute hand position detection process which moves a minute hand to a reference position. It is the figure which showed the operation | movement flow of the basic hour hand position detection process which moves an hour hand to a reference position. It is the figure which showed the operation | movement flow of a second hand position detection process among the basic 3 hand position detection processes which move a second hand, a minute hand, and an hour hand to a reference position. It is the figure which showed the operation | movement flow of a minute hand position detection process among the basic 3 hand position detection processes which move a second hand, a minute hand, and an hour hand to a reference position. It is the figure which showed the operation | movement flow of a minute hand position confirmation process among the basic 3 hand position detection processes which move a second hand, a minute hand, and an hour hand to a reference position. It is the figure which showed the operation | movement flow of an hour hand position detection process among the basic 3 hand position detection processes which move a second hand, a minute hand, and an hour hand to a reference position. It is the figure which showed the operation | movement flow of the hand position confirmation process which confirms the position of a second hand, a minute hand, and an hour hand for every 55 minutes every hour at the time of normal hand movement. It is the figure which showed the operation | movement flow of the error process for stopping a needle position detection process when a needle position detection error generate | occur | produces continuously. It is the figure which showed the display state of the needle | hook position detection error by the table | surface. It is the figure which showed the operation | movement flow of the needle | hook control process in case the wristwatch is not used. It is the figure which showed the operation | movement flow of the hand position detection process for every hour in the state where the exterior of a wristwatch is dark. It is the figure which showed the operation flow of the error processing when the hand position detection error occurs in the state where the outside of the wristwatch is dark. It is the figure which showed the operation | movement flow of the 1st modification of the minute hand position detection means in the minute hand wheel of this embodiment. It is the enlarged plan view which showed the 2nd modification of the second hand wheel of this embodiment. It is the enlarged plan view which showed the 3rd modification of the second hand wheel of this embodiment.

Hereinafter, an embodiment in which the present invention is applied to a pointer type wristwatch will be described with reference to FIGS.
This pointer-type wristwatch includes a timepiece module 1 shown in FIGS. 1 and 2. The timepiece module 1 is configured such that the second hand 2, the minute hand 3, and the hour hand 4 move the dial 5 above to indicate the time, and is arranged in the watch case TK. In this case, although not shown, a watch glass is attached to the upper part of the watch case TK, and a back cover is attached to the lower part of the watch case TK.

  As shown in FIG. 2, the timepiece module 1 includes an upper housing 6 and a lower housing 7, and a timepiece movement 8 is provided between them. In this case, the dial plate 5 is provided on the upper surface of the upper housing 6 located on the upper side via the solar panel 9. A circuit board 10 is provided on the inner surface (the upper surface in FIG. 2) of the lower housing 7 located on the lower side.

  2 to 4, the timepiece movement 8 includes a first drive system 11 for moving the second hand 2, a second drive system 12 for moving the minute hand 3 and the hour hand 4, a second hand 2, a minute hand 3, and an hour hand 4. The upper housing 6 and the lower housing in a state in which the first and second drive systems 11 and 12 are attached to the main plate 14, the train wheel bridge receiver 15, and the core holder 16. 7 is arranged.

  2 to 4, the first drive system 11 includes a first stepping motor 17, a fifth wheel 18 rotated by the first stepping motor 17, and four wheels rotated by the fifth wheel 18. The second hand wheel 20 is a second wheel, and the second hand 2 is attached to the second hand shaft 20a of the second hand wheel 20 (see FIG. 4). In this case, as shown in FIG. 2, the first stepping motor 17 includes a coil block 17a, a stator 17b, and a rotor 17c. The first stepping motor 17 generates a magnetic field in the coil block 17a so that the rotor 17c is moved 180 degrees at a time. It is configured to rotate stepwise.

  As shown in FIGS. 2 and 3, the fifth wheel 18 is engaged with the rotor kana 17 d of the rotor 17 c in the first stepping motor 17 and rotates. The second hand wheel 20 meshes with the pinion 18a of the fifth wheel 18 and rotates. A second hand shaft 20 a is provided at the center of the second hand wheel 20. As shown in FIG. 2, the second hand shaft 20a protrudes upward through the through holes 5a of the upper housing 6, the solar panel 9, and the dial 5, and the second hand 2 is formed at the protruding tip as shown in FIG. It is configured to be attached. Further, as shown in FIGS. 5 and 7, the second hand wheel 20 is provided with a first light transmission hole portion 21 to be described later.

  On the other hand, as shown in FIGS. 2 to 5, the second drive system 12 includes a second stepping motor 22, an intermediate wheel 23 that is rotated by the second stepping motor 22, and a third wheel that is rotated by the intermediate wheel 23. 24, a minute hand wheel 25 that is a second wheel that is rotated by the third wheel 24, a minute wheel 26 that is rotated by the minute wheel 25, and an hour wheel that is a hour wheel that is rotated by the minute wheel 26 27, the minute hand 3 is attached to the minute hand shaft 25 a of the minute hand wheel 25, and the hour hand 4 is attached to the hour hand shaft 27 a of the hour hand wheel 27.

  In this case, as shown in FIG. 2, the second stepping motor 22 includes a coil block 22a, a stator 22b, and a rotor 22c. The second stepping motor 22 generates a magnetic field in the coil block 22a so that the rotor 22c is rotated by 180 degrees. It is configured to rotate stepwise. As shown in FIGS. 2 and 3, the intermediate wheel 23 rotates while meshing with the rotor kana 22 d of the rotor 22 c in the second stepping motor 22. As shown in FIG. 5, the intermediate wheel 23 is provided with a fourth light transmission hole portion 30 described later. The third wheel 24 is meshed with the pinion 23a of the intermediate wheel 23 and rotated, and the minute hand wheel 25 is meshed with the pinion 24a of the third wheel 24 and rotated.

  As shown in FIGS. 2 and 4, a cylindrical minute hand shaft 25 a is provided at the center of the minute hand wheel 25. The second hand shaft 20 a of the second hand wheel 20 is rotatably inserted and protrudes upward. As shown in FIG. 2, the minute hand shaft 25a protrudes upward through the through holes 5a of the upper housing 6, the solar panel 9, and the dial 5, and the minute hand 3 is attached to the protruding tip as shown in FIG. It is configured to be attached. Thereby, the minute hand wheel 25 is arranged on the same axis as the second hand wheel 20 in a state of being overlapped with the lower side of the second hand wheel 20. Further, as shown in FIG. 5, the minute hand wheel 25 is provided with a second light transmission hole 28 which will be described later.

  As shown in FIG. 2, the minute wheel 26 is engaged with the pinion 25a of the minute hand wheel 25 and rotates. The hour hand wheel 27 meshes with the pinion 26a of the minute wheel 26 and rotates. At the center portion of the hour hand wheel 27, a cylindrical hour hand shaft 27a is provided which is inserted into the minute hand shaft 25a of the minute hand wheel 25 so as to be rotatable and protrudes upward. 2, the hour hand shaft 27a protrudes upward through the through holes 5a of the upper housing 6, the solar panel 9, and the dial 5 as shown in FIG. 2, and the hour hand 4 is projected to the protruding tip as shown in FIG. It is configured to be attached. Thereby, the hour hand wheel 27 is arranged on the same axis as the second hand wheel 20 and the minute hand shaft 25 in a state of being overlapped with the lower side of the minute hand wheel 25. Further, as shown in FIG. 5, the hour wheel 27 is provided with a third light transmission hole 29 which will be described later.

  In this case, the number of teeth of each gear in the first and second drive systems 11 and 12, the rotation angle of each gear in one pulse, the number of pulses required for one rotation of each gear, and the first to fourth light transmissions The presence or absence of the holes 21 and 28 to 30 is set as shown in the table of FIG. That is, the rotor 17c of the rotor 17c in the first drive system 11 rotates 180 degrees (hereinafter, the unit of angle is referred to as “°”) with one pulse (1 step), and the fifth wheel 18 has one pulse (of the rotor 17c). Rotate 36 ° in one step). The second hand wheel 20 that is the fourth wheel rotates 6 degrees by one pulse (one step of the rotor 17c), and thereby makes one rotation by 60 pulses (60 steps of the rotor 17c).

  The rotor kana 22d of the rotor 22c in the second drive system 12 rotates 180 ° (one step) with one pulse, and the intermediate wheel 23 rotates 30 ° with one pulse (one step of the rotor 22c), thereby obtaining 12 pulses (rotor 22c). In 12 steps). The third wheel & pinion 24 rotates by 4 ° with one pulse (one step of the rotor 22c), and the minute hand wheel 25 as the second wheel rotates by 1 ° with one pulse (one step of the rotor 22c), so that 360 pulses (rotor) In step 360 of 22c, the motor rotates once. The hour wheel 26 rotates 1/3 ° with one pulse (one step of the rotor 22c), and the hour hand wheel 27, which is an hour wheel, rotates 1/12 ° with one pulse (one step of the rotor 22c). One rotation is made with 4320 pulses (4320 steps of the rotor 22c).

  By the way, this wrist position detecting device of the wristwatch includes positions of the first to fourth light transmission holes 21, 28 to 30 provided in the second hand wheel 20, the minute hand wheel 25, the hour hand wheel 27, and the intermediate wheel 23, respectively. Is detected optically by the detection unit 13 so that the rotational positions of the second hand wheel 20, the minute hand wheel 25, the hour hand wheel 27, and the intermediate wheel 23 are determined. That is, the detection unit 13 includes a light emitting element 31 and a light receiving element 32 as shown in FIG. The light emitting element 31 is formed of an LED (light emitting diode), and is provided in the upper housing 6 on the upper side corresponding to a location where the second hand 2, the minute hand 3, and the hour hand 4 overlap on the same axis and a part of the intermediate wheel 23 also overlaps. ing. The light receiving element 32 is made of a phototransistor, and is provided on the circuit board 10 on the lower side (upper side in FIG. 2) corresponding to the light emitting element 31.

  Thereby, the detection part 13 is the light emitting element 31 when all the 1st-4th light transmission hole parts 21 and 28-30 of the second hand wheel 20, the minute hand wheel 25, the hour hand wheel 27, and the intermediate wheel 23 respond | correspond. When the light receiving element 32 receives the light from the second hand wheel, the rotational positions of the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 are detected. In this case, the first light transmission hole portion 21 of the second hand wheel 20 includes a first circular hole 21a which is a reference hole provided at a reference position (00 second position) of the second hand wheel 20, as shown in FIG. Second and third lengths provided in the first circular hole 21a with the first and second light-shielding portions 21d and 21e at different intervals on both sides of the second hand 2 in the direction of movement and the opposite direction. Holes 21b and 21c and a third light shielding part 21f provided between the second and third long holes 21b and 21c located on the diagonal line of the first circular hole 21a are provided.

  As shown in FIGS. 7 and 27, the first circular hole 21 a has a diameter of about 0.4 to 0.5 mm (the circumference of the second hand wheel 20) when the second hand wheel 20 has a diameter of about 3 to 4 mm. And a width of about 12 ° relative to the width. Of the second and third long holes 21b and 21c, the first long hole 21b is approximately 48 ° counterclockwise with the center of the first circular hole 21a as the reference (0 °) as shown in FIG. Between the position (8-second position) and the approximately 168 ° position (28-second position), it is provided in an arc shape corresponding to the rotational movement locus of the first circular hole 21a. As shown in FIG. 7, the second long hole 21c has a center (0 °) as the center of the first circular hole 21a, and rotates counterclockwise from a position of approximately 192 ° (32 seconds) to a position of approximately 300 ° (50 seconds). ) To the arcuate shape corresponding to the rotational movement locus of the first circular hole 21a.

  In this case, of the first and second light-shielding portions 21d and 21e, the first light-shielding portion 21d located on the hand moving direction side (the counterclockwise side in FIG. 7) of the second hand 2 is, as shown in FIG. An interval approximately three times the diameter (12 ° width) of one circular hole 21a, that is, approximately 48 ° position (8 second position) counterclockwise from the reference position (0 ° position) that is the center of the first circular hole 21a. Are provided at intervals of substantially about 36 °.

  Further, the second light-shielding portion 21e located on the opposite side (the clockwise direction in FIG. 7) of the second hand 2 has an interval longer by about one of the first circular holes 21a than the interval of the first light-shielding portion 21d. That is, an interval of about 4 times the diameter of the first circular hole 21a, that is, from the reference position (0 ° position) that is the center of the first circular hole 21a to the 60 ° position (50 second position) clockwise. Are provided at intervals of a width of about 48 °. Further, as shown in FIG. 7, the third light-shielding portion 21f is formed with substantially the same size as the first circular hole 21a, and the second and third long holes 21b, which are located on the diagonal line of the first circular hole 21a, 21c.

  The first light shielding part 21d corresponds to a part of the third long hole 21c located on the diagonal line, and the second light shielding part 21e is a part of the second long hole 21b located on the diagonal line. The third light shielding portion 21f corresponds to the first circular hole 21a located on the diagonal line. Thereby, the second hand wheel 20 is in a state where any one of the first to third light shielding portions 21d to 21f corresponds to the detection position P of the detection portion 13 (the position where the light emitting element 31 and the light receiving element 32 face each other). The first circular hole 21a and the second and third elongated holes 21b and 21c are always configured to correspond to the detection position P of the detection unit 13 when rotated 180 degrees (half rotation). .

  The second hand wheel 20 rotates by one step (rotation angle 6 °: rotation time 1 second), and while the second hand wheel 20 rotates 60 steps (rotation angle 360 °: rotation time 60 seconds), the detection unit 13 is rotated every 2 seconds. When detection is performed, a detection pattern by the detection unit 13 as illustrated in FIG. 8 is obtained. That is, when the second hand wheel 20 is at the 0 second position (0 ° position), the detection unit 13 detects the first circular hole 21a, and when the second hand wheel 20 is from the 2 second position (12 ° position) to the 6 second position (36 ° position). The detection unit 13 is blocked by the first light shielding unit 21d, and an undetected state in which the detection unit 13 cannot detect light continues three times.

  When the second hand wheel 20 is from the 8 second position (48 ° position) to the 28 second position (168 ° position), the first elongated hole 21b is continuously detected by the detection unit 13, and the 30 second position (180 ° position) is detected. Sometimes, the detection unit 13 is blocked by the third light-shielding unit 21f, and the detection unit 13 cannot detect light. When the position is from the 32 second position (192 ° position) to the 50 second position (300 ° position), the detection unit 13 continuously detects the second long hole 21b, and from the 52 second position (312 ° position) to the 58 second position (348). Until the position (°), the detection unit 13 is blocked by the second light-shielding unit 21e, and an undetected state in which light detection by the detection unit 13 cannot be performed continues four times.

  On the other hand, the second light transmission hole portion 28 of the minute hand wheel 25 is one circular hole provided at the reference position (00 minute position: 0 ° position) of the minute hand wheel 25 as shown by a solid line in FIG. The circular hole of the second light transmission hole portion 28 is also approximately the same size as the first circular hole 21a of the second hand wheel 20 and is provided at a position corresponding to the first circular hole 21a of the second hand wheel 20. As shown in FIGS. 5 and 9, the third light transmitting hole 29 of the hour hand wheel 27 is provided at intervals of 30 ° from the reference position (0 o'clock position: 0 ° position) of the hour hand wheel 27 along the circumference. 11 circular holes. A fourth light shielding portion 29a is provided at the 11 o'clock position (1 o'clock position in FIG. 9) located between the circular hole at the reference position and the eleventh circular hole.

  That is, as shown in FIG. 9, the third light transmission hole 29 of the hour hand wheel 27 has a 0 o'clock position as a reference position (0 ° position) and is 0 °, 30 °, 60 °, 90 ° counterclockwise. 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 °, that is, along the direction of the hour hand 4 (in the reverse direction in FIG. 9), 0:00, 1:00, 2:00, 3 A circular hole is provided at each of the hour, 4 o'clock, 5 o'clock, 6 o'clock, 7 o'clock, 8 o'clock, 9 o'clock and 10 o'clock positions. A light shielding portion 29a is provided. At this time, each circular hole which is the third light transmission hole portion 29 of the hand wheel 27 is also formed to have substantially the same size as the first circular hole 21 a of the second hand wheel 20.

  Further, as shown in FIG. 5, the fourth light transmission hole portion 30 of the intermediate wheel 23 is one circular hole corresponding to one circular hole which is the second light transmission hole portion 28 of the minute hand wheel 25, and the second hand The first circular hole 21 a of the wheel 20 and the circular hole which is the second light transmission hole portion 28 of the minute hand wheel 25 are formed to have substantially the same size. The fourth light transmission hole 30 is configured to transmit the second light transmission of the minute hand wheel 25 when a predetermined position of the intermediate wheel 23, that is, the second light transmission hole 28 of the minute hand wheel 25 corresponds to the detection position P of the detection unit 13. It is provided at a position corresponding to the hole 28.

  As a result, the intermediate wheel 23, the minute hand wheel 25, and the hour hand wheel 27 of the second drive system 12 have their rotation angles of 30 °, 1 °, and 1/12 ° in one step (half rotation of the rotor 22c). Thus, as shown in FIG. 5, the hour hand 4 is on the hour (0 o'clock, 1 o'clock, 2 o'clock, 3 o'clock, 4 o'clock, 5 o'clock, 6 o'clock, 7 o'clock, 8 o'clock, 9 o'clock, 10 o'clock, 11 o'clock ) Except for the 11 o'clock position, all of the second to fourth light transmission hole portions 28 to 30 are configured to overlap at the detection position P of the detection unit 13.

  The rotation angle of the second hand wheel 20 of the first drive system 11 is 6 ° in one step (half rotation of the rotor 17c). The second hand wheel 20 has an hour hand 4 as shown in FIG. 5 because the first circular hole 21a of the first light transmission hole portion 21 corresponds to the detection position P of the detection portion 13 every 60 steps (60 seconds). The first circular hole 21a of the first light transmission hole portion 21 is configured to overlap the second to fourth light transmission hole portions 28 to 30 at every hour (except 11:00).

  Here, the precondition when the detection unit 13 detects the moving positions of the second hand 2, the minute hand 3, and the hour hand 4 will be described. First, the detection unit 13 includes the first, second, and third light transmission holes 21, 28, and 29 that overlap each other at the position of the second hand 2, the minute hand 3, and the hour hand 4 at the 12 o'clock side (the upper side in FIG. 5). At the same time, the fourth light transmission hole 30 of the intermediate wheel 23 is located at the 6 o'clock side (the lower position in FIG. 5) and all of the first to third light transmission holes 21, 28, 29. At the overlapping and matching location, the light from the light emitting element 31 is transmitted through the first to fourth light transmitting hole portions 21 and 28 to 30, and it is detected whether the light receiving element 32 has received the transmitted light. To do.

  Thereby, the detection part 13 receives the light from the light emitting element 31 when the 1st-4th light transmissive hole parts 21 and 28-30 correspond to the detection position P, and the light receiving element 32 receives light, When the detection state is reached and any of the first to fourth light transmission holes 21, 28 to 30 does not correspond to the detection position P, the light from the light emitting element 31 is blocked and the light receiving element 32 does not receive light. Thus, the undetected state is obtained.

  Further, each of the first and second stepping motors 17 and 22 is moved by one step by reversing the direction of the rotors 17c and 22c by 180 °. Therefore, the type of pulse output for each step is changed. By alternately switching, the rotors 17c and 22c are rotated. For this reason, even if the same type of pulse is continuously output for each step, the rotors 17c and 22c do not rotate and are stopped on the spot.

  For this reason, for example, when the second hand 2 is shifted by one step due to an external factor such as an impact, even if a pulse for moving the second hand 2 at that timing is output, the second hand 2 does not move at that time, but moves with the next pulse. It will be. Further, in the first stepping motor 17 of the first drive system 11, it is necessary to detect the position of the second hand wheel 20 every two steps. That is, if the second hand wheel 20 is not rotated two steps from the relationship between the size of the first circular hole 21a of the first light transmitting hole portion 21 and the amount of movement in one step, the first circular hole 21a is detected by the detection unit 13. Since it is not completely separated from the position P, detection every two steps (2 seconds) is effective. However, the second drive system 12 is detected for each step.

Next, a basic second hand position detection operation for detecting the reference position (00 second position) of the second hand wheel 20 will be described with reference to FIG.
In this basic second hand position detection operation, the minute hand wheel 25, hour hand wheel 27, and intermediate wheel 23 of the second drive system 12 are ignored. FIGS. 10A to 10M show a correspondence relationship between the second hand wheel 20 and the detection position P of the detection unit 13 at the rotation position when the second hand wheel 20 rotates every two steps (rotation angle 12 °). ing.

  The purpose of detecting the reference position of the second hand wheel 20 is to detect the reference position (00 second position) of the second hand wheel 20 shown in FIG. That is, the position where the first circular hole 21 a of the first light transmission hole 21 in the second hand wheel 20 coincides with the detection position P of the detection unit 13 is detected. The state of the reference position of the second hand wheel 20 is the state shown in FIG. 10A, and the first circular hole 21 a of the first light transmitting hole portion 21 in the second hand wheel 20 matches the detection position P of the detection unit 13. In this state, the detection unit 13 can detect light.

  First, in the state of FIG. 10A, when the second hand wheel 20 rotates two steps and the rotation angle becomes 12 °, the first circular hole 21a turns clockwise from the detection position P as shown in FIG. Accordingly, a part of the first light-shielding part 21d corresponds to the detection position P, so that the light detection by the detection part 13 cannot be performed and the undetected state shown at the 2-second position in FIG. Similarly, as shown in FIGS. 10C to 10D, a part of the first light-shielding portion 21d remains at the detection position P until the second hand wheel 20 rotates by two steps until the rotation angle reaches 36 °. Therefore, the light detection by the detection unit 13 cannot be performed, and the undetected state continues three times as shown at the position of 3 to 6 seconds in FIG.

  Thereafter, as shown in FIG. 10 (e), when the second hand wheel 20 rotates two steps and the rotation angle reaches 48 °, a part of the first long hole 21b of the first light transmitting hole portion 21 in the second hand wheel 20 is obtained. Corresponds to the detection position P of the detection unit 13, so that the light detection by the detection unit 13 can be performed as shown in the 8-second position of FIG. Similarly, as shown in FIG. 10 (f), a part of the first long hole 21 b is at the detection position P of the detection unit 13 until the second hand wheel 20 rotates by two steps and the rotation angle becomes 168 °. Therefore, the light detection by the detection unit 13 can be continuously performed as shown in the positions of 10 to 28 seconds in FIG.

  In this state, as shown in FIG. 10 (g), when the second hand wheel 20 further rotates two steps and the rotation angle becomes 180 °, the first long hole 21b is shifted clockwise from the detection position P, and the third Since the light shielding part 21f corresponds to the detection position P, the light detection by the detection part 13 cannot be performed, and as shown in the 30-second position in FIG. Thereafter, as shown in FIG. 10 (h), when the second hand wheel 20 rotates two steps and the rotation angle becomes 192 °, a part of the second long hole 21c of the first light transmitting hole portion 21 in the second hand wheel 20 is obtained. Corresponds to the detection position P of the detection unit 13, so that the detection unit 13 can detect light as shown at the 32 second position in FIG.

  Thereafter, as shown in FIG. 10 (i), a part of the second long hole 21c corresponds to the detection position P of the detection unit 13 until the second hand wheel 20 rotates by two steps and the rotation angle becomes 300 °. Therefore, as shown in the position of 34 to 50 seconds in FIG. 8, the light detection by the detection unit 13 can be continuously performed. Then, as shown in FIG. 10 (j), when the second long hole 21c is shifted clockwise from the detection position P and a part of the second light shielding portion 21e corresponds to the detection position P, the light detection by the detection unit 13 is performed. As shown in the 52-second position in FIG.

  Similarly, as shown in FIGS. 10 (k) to 10 (m), a part of the second light-shielding portion 21e remains at the detection position P until the second hand wheel 20 rotates by two steps and the rotation angle becomes 348 °. Therefore, the light detection by the detection unit 13 cannot be performed, and the undetected state continues four times as shown at positions 54 to 58 seconds in FIG. In this state, when the second hand wheel 20 rotates two steps and the rotation angle becomes 360 °, the first circular hole 21a corresponds to the detection position P of the detection unit 13 as shown in FIG. As shown in the 0 second position at 8, the light can be detected by the detector 13.

  Thus, in the state of FIG. 10A, the detection unit 13 can detect light, and in the states of FIG. 10B to FIG. 10D, the detection unit 13 performs light detection three times in succession. It is in a state that can not be done. 10 (e) to 10 (f), the detection unit 13 can continuously detect light, and in the state of FIG. 10 (g), the detection unit 13 cannot detect light. . 10 (h) to 10 (i), the light detection by the detection unit 13 can be continuously performed. In the states of FIGS. 10 (j) to 10 (m), the light by the detection unit 13 is obtained. This is a state where detection cannot be performed four times in succession.

  Here, the undetected states where light cannot be detected continuously are the states of FIGS. 10B to 10D and the states of FIGS. 10J to 10M. Paying attention to the state, when detection is performed every two steps, the undetected state continues three times for the former, the undetected state continues four times for the latter, and the number of consecutive undetected states differs between the former and the latter I understand that. The reference position can be specified by counting the undetected state where the light cannot be detected continuously.

  That is, the second hand wheel 20 detects every 2 steps (2 seconds), and when the undetected state continues four times and can be detected in the next time, the position is the reference position (00 second position). It will be. If the undetected state is counted from the state of FIG. 10B, the undetected state continues three times until the state of FIG. 10D is reached. Thereafter, the state of FIG. Since the detection unit 13 can detect light, the condition that the undetected state continues four times cannot be satisfied, and it is understood that the undetected state is not the reference position. This is a basic position detection operation for detecting the reference position of the second hand wheel 20.

Next, a basic hour / minute position detection operation for detecting each reference position of the minute hand wheel 25 and the hour hand wheel 27 will be described with reference to FIG.
In this basic hour / minute position detection operation, the second hand wheel 20 of the first drive system 11 is ignored. 11 (a) to 11 (m) show a state in which the minute hand wheel 25 rotates every step (1 °) to rotate the intermediate wheel 23 once, and FIG. 11 (m) to FIG. (N) shows a state in which the minute hand wheel 25 is rotated 360 steps (360 °) and the hour hand wheel 27 is rotated by 30 °. FIGS. 11 (n) to 11 (o) show that the hour hand wheel 27 is nine hours. 11 (o) to FIG. 11 (p) show the state in which the hour hand wheel 27 is further rotated for one hour (total 11 hours).

  The purpose of detecting the reference position (0:00 position) of the minute hand wheel 25 and the hour hand wheel 27 is to detect the reference positions of the minute hand wheel 25 and the hour hand wheel 27 shown in FIG. . That is, the second light transmission hole 28 of the minute hand wheel 25, the third light transmission hole 29 at the reference position (0 o'clock position) of the hour hand wheel 27, and the fourth light transmission hole 30 of the intermediate wheel 23. In other words, all the positions that coincide with the detection position P of the detection unit 13 are detected. The state of this reference position is the state of FIG.

  First, when the minute hand wheel 25 is rotated by one step (1 °) in the state of FIG. 11A, the intermediate wheel 23 is rotated by 30 ° as shown in FIG. The four light transmission holes 30 are separated from the detection position P, and the intermediate wheel 23 closes the detection position P of the detection unit 13. At this time, the minute hand wheel 25 is rotated by 1 ° clockwise and the second light transmission hole 28 is slightly displaced at the detection position P of the detection unit 13, so that the detection unit 13 can detect light.

  In this state, when the minute hand wheel 25 rotates one step at a time and rotates six steps (6 °), the intermediate wheel 23 rotates 180 ° as shown in FIG. Is 180 ° away from the detection position P of the detection unit 13 and continues to block the detection position P of the detection unit 13. At this time, the minute hand wheel 25 rotates clockwise by 6 °, and the second light transmission hole portion 28 is shifted by almost half from the detection position P of the detection unit 13, but at a position where the light detection by the detection unit 13 is still possible. Yes (see FIG. 16).

  Thereafter, when the minute hand wheel 25 is rotated step by step and rotated by 12 steps (12 °), the intermediate wheel 23 is rotated 360 ° as shown in FIG. This corresponds to the detection position P. At this time, the second light transmitting hole portion 28 of the minute hand wheel 25 is almost completely separated from the detection position P, and the second light transmitting hole portion 28 is hardly overlapped with the detection position P, so that the minute hand wheel 25 is detected at the detection position P. And the detection unit 13 cannot detect light. At this time, since the hour hand wheel 27 only rotates by 1 °, the circular hole at the reference position, which is the third light transmitting hole portion 29 of the hour hand wheel 27, is slightly shifted at the detection position P, and the detection unit 13 is ready for light detection

  When the minute hand wheel 25 rotates 360 steps (one rotation), as shown in FIG. 11 (n), the second light transmitting hole portion 28 of the minute hand wheel 25 and the fourth light transmitting hole portion 30 of the intermediate wheel 23 are connected. The state corresponds to the detection position P. At this time, the hour hand wheel 27 is rotated by 30 °, and the circular hole at the reference position, which is the third light transmission hole 29, is separated from the detection position P, and is located on the left side of the reference position, which is the third light transmission hole 29. The th circular hole corresponds to the detection position P, and the detection unit 13 can detect light. In this state, when the minute hand wheel 25 rotates for 9 hours (a total of 10 hours), as shown in FIG. 11 (o), the second light transmitting hole portion 28 of the minute hand wheel 25 and the fourth light of the intermediate wheel 23 are obtained. The transmission hole 30 corresponds to the detection position P, the hour hand wheel 27 rotates by 300 °, the eleventh circular hole from the reference position which is the third light transmission hole 29 corresponds to the detection position P, and the detection unit 13 is ready for light detection.

  Thereafter, when the minute hand wheel 25 further rotates for one hour (a total of 11 hours), as shown in FIG. 11 (p), the second light transmitting hole portion 28 of the minute hand wheel 25 and the fourth light of the intermediate wheel 23 are obtained. Although the transmission hole portion 30 corresponds to the detection position P, the hour hand wheel 27 is rotated by 330 °, and the eleventh circular hole from the reference position, which is the third light transmission hole portion 29, is separated from the detection position P. The fourth light shielding portion 29a corresponds to the detection position P. For this reason, the detection unit 13 cannot detect light. This state can be specified as “11:00 position”.

  When the minute hand wheel 25 further rotates for one hour (total 12 hours), as shown in FIG. 11A, the second light transmission hole portion 28 of the minute hand wheel 25 and the fourth light transmission of the intermediate wheel 23 are obtained. While the hole 30 corresponds to the detection position P, the hour hand wheel 27 rotates 360 °, the fourth light-shielding portion 29a of the hour hand wheel 27 moves away from the detection position P, and the reference position (third light transmission hole 29) The circular hole at (0 o'clock position) corresponds to the detection position P and returns to the reference position (0:00 position).

  Thus, since the rotation amount of one step of the minute hand wheel 25 is as small as 1 °, the second light transmission hole portion 28 can be completely separated from the detection position P with the rotation amount of one step of the minute hand wheel 25. Therefore, although the reference position of the minute hand wheel 25 cannot be detected accurately, the intermediate wheel 23 rotates 30 ° in one step, so that even if the rotation amount of the minute hand wheel 25 in one step is small, the intermediate wheel 23 is in the middle. Since the rotation amount of the car 23 is large, the detection position P can be closed by the intermediate wheel 23.

  Further, as shown in FIG. 11 (m), when the intermediate wheel 23 rotates once in 12 steps, the minute hand wheel 25 rotates by 12 °, so that the circular hole of the second light transmission hole portion 28 of the minute hand wheel 25 is detected. Therefore, the minute hand wheel 25 closes the detection position P. At this time, even if the fourth light transmission hole 30 of the intermediate wheel 23 coincides with the detection position P, the detection unit 13 cannot detect light.

  Further, every time the minute hand wheel 25 rotates 360 steps, the second light transmitting hole portion 28 of the minute hand wheel 25, the fourth light transmitting hole portion 30 of the intermediate wheel 23, and the third hour wheel 27 of the third hand wheel 27. Any one of the light transmission holes 29 (excluding the fourth light shielding part 29a at the 11 o'clock position) corresponds to the detection position P, so that the detection unit 13 can detect light. That is, the position where the light can be detected by the detection unit 13 is the reference position every time the minute hand wheel 25 makes one rotation (360 steps) regardless of the rotation position of the hour hand wheel 27 (excluding the 11 o'clock position). By returning to (0 ° position), it becomes “00 minute position”.

  Further, after detecting the reference position (0 ° position) of the minute hand wheel 24, when the minute hand wheel 25 is rotated by 360 steps (one rotation), the hour hand wheel 27 is rotated by 30 °, whereby the minute hand wheel 25 is Even if the light detection by the detection unit 13 is not performed every step, if the light detection by the detection unit 13 is executed only when the minute hand wheel 25 is rotated once, the rotational position of the hour hand wheel 27 can be detected. At this time, by rotating the minute hand wheel 25 360 steps from the state shown in FIG. 11 (n), the position where the detection unit 13 cannot detect light is the fourth position of the hour hand wheel 27 as shown in FIG. 11 (p). It is a position where the light shielding part 29a and the detection position P coincide with each other, and this position can be specified as “11:00 position”.

  When the minute hand wheel 25 is further rotated 360 ° from the “11:00 position” where the detection unit 13 cannot detect light, the reference position (0 o'clock position) that is the third light transmission hole 29 of the hour hand wheel 27 is circular. When the hole corresponds to the detection position P, it becomes a reference position where the detection unit 13 can detect light, that is, “0:00 position”. Thus, each time the minute hand wheel 25 rotates 360 ° (one rotation) from a state where light can be detected by the detection unit 13, a position where the detection unit 13 cannot detect light is detected by attempting light detection by the detection unit 13 (see FIG. 11 (p)), the position where the detection wheel 13 can detect light by further rotating the minute hand wheel 25 by 360 ° (state shown in FIG. 11 (a)) is the reference position of the hour hand wheel 27, that is, “0 o'clock”. It can be specified as “00 minute position”.

Next, a basic three-hand position detection operation for detecting the positions of the three hands of the second hand 2, the minute hand 3, and the hour hand 4 will be described with reference to FIGS.
This three-hand position detection operation is a combination of the second-hand position detection operation and the hour / minute-hand position detection operation, and when either does not satisfy the position detection condition (that is, the first light transmitting hole of the second hand wheel 20). Portion 21 and the second light transmission hole 28 of the minute hand wheel 25 and the third light transmission hole 29 of the hour hand wheel 27 are deviated from the detection position P), or both, If not satisfied (that is, both the first light transmitting hole portion 21 of the second hand wheel 20 and the second light transmitting hole portion 28 of the minute hand wheel 25 and the third light transmitting hole portion 29 of the hour hand wheel 27 are detected positions P). There are three types of operations.

First, with reference to FIG. 12, the three-hand position detection operation in the case where only the first light transmission hole portion 21 of the second hand wheel 20 is shifted from the detection position P will be described.
At this time, it is assumed that the state of the second hand wheel 20 is not known at all, and the minute hand wheel 25 and the hour hand wheel 27 are at the reference position (0:00 position). Therefore, first, a basic second hand position detecting operation for detecting the reference position of the second hand wheel 20 is tried. That is, in this basic second hand position detecting operation, as described above, the second hand wheel 20 is rotated by two steps, and light detection is performed by the detecting unit 13 every two steps.

  At this time, when the second hand wheel 20 is rotated by two steps and light detection by the detection unit 13 is attempted, the light detection by the detection unit 13 cannot be performed in the state of FIG. Here, an undetected state in which light detection by the detection unit 13 cannot be performed is counted as “the number of undetected times”. When this undetected state continues, the number of undetected times is sequentially added, and only when the light detection cannot be continuously performed every two-step rotation of the second hand wheel 20, the number of undetected times is added, When light detection is possible, the number of undetected times is cleared.

  Then, the second hand wheel 20 is further rotated two steps to try to detect light by the detection unit 13. At this time, as shown in FIG. 12B, if the detection unit 13 cannot detect light, the undetected state continues, and the number of undetected times is added. In this state, when the second hand wheel 20 is further rotated two steps and the detection unit 13 tries to detect light, as shown in FIG. 12C, if the detection unit 13 can detect light, the undetected state continues. Clear the number of undetected times.

  Subsequently, light detection by the detection unit 13 is attempted every two steps of the second hand wheel 20. At this time, as shown in FIG. 12D, when the light detection by the detection unit 13 is continuously performed until the previous time, the light detection is not possible, and the number of undetected times is counted again here. Then, light detection of every second step of the second hand wheel 20 is attempted. At this time, as shown in FIG. 12E, the undetected state in which the detection unit 13 cannot detect the light continues four times.

  If the light can be detected by the detection unit 13 in the next two steps, the position becomes the reference position (00 second position) of the second hand 20. At this time, as shown in FIG. 12 (f), if the detection unit 13 can detect light, the first circular hole 21 a of the first light transmission hole 21 of the second hand wheel 20 matches the detection position P of the detection unit 13. Therefore, it can be seen that this position is the reference position (00 second position) of the second hand wheel 20. Up to this point, the reference position of the second hand wheel 20, that is, “00 second position” is detected.

Next, referring to FIG. 13, the three-hand position detection operation when the second light transmission hole portion 28 of the minute hand wheel 25 and the third light transmission hole portion 29 of the hour hand wheel 27 are displaced from the detection position P. explain.
At this time, even though the first light transmission hole portion 21 of the second hand wheel 20 corresponds to the detection position P of the detection unit 13, the minute hand wheel 25 and the hour hand wheel 27 are displaced from the detection position P. Cannot detect light. For this reason, first, a basic second hand position detecting operation for moving the second hand wheel 20 to the reference position is tried.

  At this time, when the second hand wheel 20 is rotated by two steps and light detection by the detection unit 13 is attempted every two steps, the state changes from the state of FIG. 13 (a) to the state of FIG. 13 (b). Even if the first light transmission hole 21 coincides with the detection position P, the second light transmission hole 28 of the minute hand wheel 25 and the third light transmission hole 29 of the hour hand wheel 27 are displaced from the detection position P. Therefore, light detection by the detection unit 13 cannot be performed. At this time, when the second hand wheel 20 changes from the state shown in FIG. 13A to the state shown in FIG. 13B, the undetected state continues four times.

  Here, the basic position detection operation condition of the second hand wheel 20 is “detection of light every second step of the second hand wheel 20, and after four consecutive undetected states, light detection was possible in the next time. If the position is the reference position, the undetected state continues four times in the state of FIG. 13B, and the second hand can detect the light in the next two steps. Although the wheel 20 is at the reference position, even if the second hand wheel 20 is rotated by two steps, the second light transmitting hole portion 28 of the minute hand wheel 25 and the second hand wheel 27 of the hour hand wheel 27 as shown in FIG. Since the three light transmission holes 29 are displaced from the detection position P, the detection unit 13 cannot detect light.

  For this reason, the second hand wheel 20 cannot be detected by the detection unit 13 five times continuously every two steps, and cannot be detected five times continuously. It can be seen that any one of the 25 second light transmitting hole portions 28 and the third light transmitting hole portion 29 of the hour wheel 27 are displaced from the detection position P. Further, in this state, it is not known whether or not the second hand wheel 20 is in a state where the first light transmission hole portion 21 coincides with the detection position P.

  However, at this time, it has been found that either the second light transmitting hole portion 28 of the minute hand wheel 25 or the third light transmitting hole portion 29 of the hour hand wheel 27 is displaced from the detection position P. A basic hour / minute hand position detecting operation for detecting the reference position of the wheel 25 and the hour hand wheel 27 is tried. At this time, when the minute hand wheel 25 and the hour hand wheel 27 are changed from the state of FIG. 13C to the state of FIG. The second light transmitting hole portion 28 of the minute hand wheel 25 and the fourth light transmitting hole portion 30 of the intermediate wheel 23 correspond to the detection position P, and any circular hole of the third light transmitting hole portion 29 of the hour hand wheel 27. Corresponds to the detection position P, and the detection unit 13 can detect light.

  Thereby, it can be seen that the minute hand wheel 25 is at the reference position (00 minute position). At this time, the position of the second hand wheel 20 and the hour hand wheel 27 is not yet known. Therefore, when the light detection by the detection unit 13 is possible, first, a basic second hand position detection operation for detecting the reference position of the second hand wheel 20 is performed, and the second hand wheel 20 is shown in FIG. Move to the indicated reference position (00 second position). Thereby, it can be seen that the second hand wheel 20 and the minute hand wheel 25 are reference positions (00 minute 00 second positions), respectively.

  Thereafter, when the minute hand wheel 25 is rotated by 360 ° (one rotation), the third light transmitting hole portion 29 of the hour hand wheel 27 corresponds to the detection position P every 360 °, and the detection unit 13 can detect light, The position rotated 360 ° from the state where the detection unit 13 cannot detect light (11 o'clock position) becomes the reference position (0 o'clock position) of the hour hand wheel 27. As a result, the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 are all at the reference position (00:00:00 position).

Next, referring to FIG. 14, all of the first light transmitting hole portion 21 of the second hand wheel 20, the second light transmitting hole portion 28 of the minute hand wheel 25, and the third light transmitting hole portion 29 of the hour hand wheel 27 are detected portions. The three-needle position detection operation in the case where the position is deviated from the 13 detection positions P will be described.
At this time, none of the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 has a known rotational position. For this reason, first, a basic second hand position detecting operation for detecting the reference position of the second hand wheel 20 is tried. In other words, the second hand wheel 20 is rotated by two steps in the state of FIG. At this time, as shown in FIG. 14 (b), even if the first light transmission hole 21 of the second hand wheel 20 corresponds to the detection position P, the second light transmission hole 28 of the minute hand wheel 25 and the hour hand wheel 27. If the third light transmission hole 29 does not correspond to the detection position P, the detection unit 13 cannot detect light.

  For this reason, the basic second hand position detection operation of the second hand wheel 20 is further executed. The basic condition of the second hand position detection operation is that light detection is performed every two steps of the second hand wheel 20, and when the undetected state continues four times and then light detection can be performed the next time, this is the reference position. Therefore, as shown in FIG. 14B, when the second hand wheel 20 is not detected four times in succession and light detection can be performed by the detection unit 13 in the next two steps, the second hand wheel 20 is set to the reference position. However, even if the second hand wheel 20 is rotated by two steps, as shown in FIG. 14C, when the detection unit 13 cannot detect light, the second light transmitting hole 28 of the minute hand wheel 25 It is determined that the third light transmission hole 29 of the hour hand wheel 27 is displaced from the detection position P. At this time, the second hand wheel 20 also does not know whether the first light transmission hole 21 corresponds to the detection position P.

  In this state, it is determined that the second light transmission hole portion 28 of the minute hand wheel 25 is displaced from the detection position P, and then the basic position detection for detecting the reference position of the minute hand wheel 25 and the hour hand wheel 27 is performed. Try to move. That is, when the minute hand wheel 25 is rotated step by step and light detection by the detection unit 13 is attempted, the light detection by the detection unit 13 is detected even if the minute hand wheel 25 is rotated 360 ° as shown in FIG. If it is not possible, as shown in FIG. 14D, it is suspected that the first light transmission hole 21 of the second hand wheel 20 does not correspond to the detection position P, and the second hand wheel 20 is rotated by 30 steps (180 °). Let

  That is, when the second hand wheel 20 is rotated 180 ° (half rotation) in a state where the first light transmission hole portion 21 of the second hand wheel 20 does not correspond to the detection position P, the first light transmission hole portion 21 is always detected. By corresponding to P, it is assumed that the first light transmission hole portion 21 of the second hand wheel 20 corresponds to the detection position P as shown in FIG. In this state, the minute hand wheel 25 is rotated again step by step, and light detection by the detection unit 13 is attempted. At this time, when the second light transmission hole portion 28 of the minute hand wheel 25 corresponds to the detection position P and the detection unit 13 can detect light, the minute hand wheel 25 is moved to the reference position (00) shown in FIG. Minute position). The state of FIG. 14 (f) is the same as the state of FIG. 13 (d), and if the operation after the state of FIG. 13 (d) is performed, all of the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 are all. Becomes the reference position.

Next, a basic hand position checking operation for checking whether the second hand 2, the minute hand 3, and the hour hand 4 are aligned at every hour on the normal hand movement will be described with reference to FIG.
This basic hand position checking operation is to check whether or not the second hand 2 is aligned at every hour except 11:00 and 23:00, and it is necessary to check the displacement of the second hand 2 within 10 seconds. . That is, when 10 seconds have elapsed, the minute hand wheel 25 is rotated by one step (1 °) by the second stepping motor 22 of the second drive system 12, and the intermediate wheel 23 is rotated by 30 ° accordingly, and the detection unit 13 This is because the detection position P is blocked.

  The state shown in FIG. 15A is a normal time during normal hand movement (for example, 2 o'clock), and the first circular hole 21a of the first light transmission hole portion 21 of the second hand wheel 20 and the second light transmission of the minute hand wheel 25. The hole 28, the third light transmission hole 29 (for example, the third circular hole) of the hour hand wheel 27, and the fourth light transmission hole 30 of the intermediate wheel 23 all coincide with the detection position P of the detection unit 13. Yes. In this state, the second hand wheel 20 is moved normally by one step (6 °). At this time, since the second hand wheel 20 only rotates 6 ° every second, the first circular hole 21a of the second hand wheel 20 is not completely separated from the detection position P of the detection unit 13, and the light detection by the detection unit 13 is performed. It is possible.

  Thereafter, when the second hand wheel 20 further rotates by one step and reaches the second position after two steps (12 °), as shown in FIG. 15B, the first circular hole 21a of the second hand wheel 20 is detected by the detection unit. The detection position P of the detection unit 13 is completely blocked from the first detection unit 21d. At this time, if light detection by the detection unit 13 is attempted, an undetected state in which light detection by the detection unit 13 cannot be performed is entered, and this undetected state is counted as the number of undetected times.

  Then, the second hand wheel 20 rotates by one step, and the detection unit 13 tries to detect light every two steps. At this time, the detection unit 13 is continuously blocked by the first light-shielding unit 21d of the second hand wheel 20 as shown in the 4-second position shown in FIG. 15C and the 6-second position shown in FIG. As a result, as shown in FIGS. 15B to 15D, the undetected state in which the light detection by the detection unit 13 cannot be performed continues three times.

  In this state, the second hand wheel 20 is next rotated by two steps, and a part of the first long hole 21b of the second hand wheel 20 corresponds to the detection unit 13 as shown at the 8 second position in FIG. When the light detection by the portion 13 is completed, the second circular wheel 21a, which is the reference position of the second hand wheel 20, becomes the eight second position, so that the second hand wheel 20 rotates correctly and the second hand 2 is in the correct hand movement position. become. That is, the second hand 2 is detected by the detection unit 13 every time the second hand wheel 20 rotates two steps from the current position, and after the undetected state by the detection unit 13 continues three times, the detection unit 13 then When the detection is completed, the position is 8 seconds and the hand is moved correctly.

  Thereafter, when the second hand wheel 20 further rotates by two steps to 10 seconds, a part of the first long hole 21b of the second hand wheel 20 corresponds to the detection unit 13 as shown in FIG. 13, but the minute hand wheel 25 rotates one step (1 °) and the intermediate wheel 23 rotates one step (30 °), so that the second light transmission hole portion 28 of the minute hand wheel 25 is moved. Even if it is not completely separated from the detection position P of the detection unit 13, the fourth light transmission hole 30 of the intermediate wheel 23 is completely separated from the detection position P of the detection unit 13, and the intermediate wheel 23 blocks the detection unit 13. It will be. For this reason, it is necessary to carry out the needle alignment during normal hand movement within 10 seconds.

Next, the circuit configuration of this pointer-type wristwatch will be described with reference to the block diagram of FIG.
This circuit configuration includes a CPU (Central Processing Unit) 35 that controls the entire circuit, a ROM (Read Only Memory) 36 that stores a predetermined program, a RAM (Random Access Memory) 37 that stores processing data, and a CPU 35. A transmission circuit 38 for generating a pulse for operating the signal, a frequency dividing circuit 39 for converting the pulse generated by the transmission circuit 38 into an appropriate frequency (an appropriate frequency for operating the CPU 35), a pointer (second hand 2, minute hand) 3, a timepiece movement 8 for moving the hour hand 4), a detection unit 13 having a light emitting element 31 for emitting light and a light receiving element 32 for receiving light from the light emitting element 31.

  Furthermore, in addition to the above, this circuit configuration includes a power supply unit 40 such as a battery, an antenna 41 that receives standard time radio waves, a detection circuit 42 that detects received standard time radio waves, an illumination unit 43 that illuminates the time display, An illumination drive circuit 44 for driving the illumination unit 43, a speaker 45 for reporting sound, a buzzer circuit 46 for driving the speaker 45, and receiving external light to generate electric power to supply power to the power source unit 40. A solar panel 9 for determining whether or not the outside of the watch case 1 is in a dark state and a plurality of push button switches SW for selecting and switching various modes are provided.

Next, a basic second hand position detection process for detecting the reference position of the second hand 2 in the pointer type wristwatch will be described with reference to FIG.
This basic second hand position detection process is to detect the reference position (00 second position) of the second hand wheel 20, and as shown in FIG. 10A, the first light transmission hole 21 in the second hand wheel 20. The first circular hole 21a and the detection position P of the detection unit 13 are detected at the same position. In this case, the minute hand wheel 25, hour hand wheel 27 of the second drive system 12, and second to third light transmission hole portions 28 to 30 of the intermediate wheel 23 stop in accordance with the detection position P of the detection unit 13. Assuming that

  When the second hand position detection process is started, the number of undetected times already detected by the detection unit 13 is cleared last time, the undetected flag is set to “0” (step S1), and the second hand wheel 20 is rotated by two steps (12 °). (Step S2), the light emitting element 31 of the detection unit 13 is caused to emit light (Step S3), and the light detection by the detection unit 13 is detected by detecting whether or not the light receiving element 32 has received the light of the light emitting element 31. It is determined whether or not there has been (step S4).

  At this time, when any of the first circular hole 21a, the second and third elongated holes 21b, 21c of the first light transmission hole 21 in the second hand wheel 20 corresponds to the detection position P of the detection unit 13. When the light receiving element 32 receives the light from the light emitting element 31, it is determined that the light is detected by the detecting unit 13, and the process returns to step S1 to each of the first to third light shielding parts 21d to 21f of the second hand wheel 20. The above operation is repeated until either of the above blocks the detection position P corresponding to the detection position P of the detection unit 13.

  Then, the second hand wheel 20 rotates by two steps, and the first circular hole 21a, the second and third long holes 21b, 21c in the first light transmission hole portion 21 of the second hand wheel 20 are When the position of the second hand wheel 20 is shifted from the detection position P and any one of the first to third light shielding portions 21d to 21f of the second hand wheel 20 corresponds to the detection position P of the detection portion 13, the light receiving element 32 receives the light from the light emitting element 31. Therefore, the detection unit 13 enters an undetected state in which no light is detected, the undetected state is counted as the number of undetected times, the undetected flag is set to “1” (step S5), and the undetected state continues four times. It is determined whether or not it has been done (step S6).

  That is, the reference position of the second hand wheel 20 is detected next as shown in FIG. 10A after four consecutive undetected states, as shown in FIGS. 10J to 10M. This is because when the light is detected by the unit 13, the position can be specified as the reference position. Therefore, for example, from the state of FIG. 10 (b) to the state of FIG. 10 (d), a part of the first light shielding portion 21d of the second hand wheel 20 corresponds to the detection position P. Although the number of undetected times continues three times, when the second hand wheel 20 next rotates by two steps, a part of the first long hole 21b of the second hand wheel 20 corresponds to the detection position P, and light detection by the detection unit 13 is performed. At this time, the process returns to step S2 to repeat the above-described operation.

  Similarly, in the state of FIG. 10G, the third light-shielding portion 21 f of the second hand wheel 20 corresponds to the detection position P of the detection unit 13, so that there is no light detection by the detection unit 13. When the rotation is performed by two steps, a part of the second long hole 21c of the second hand wheel 20 corresponds to the detection position P, and light detection is performed by the detection unit 13. Therefore, the process returns to step S2 and the above-described operation is repeated. When the second hand wheel 20 rotates from the state shown in FIG. 10 (j) to the state shown in FIG. 10 (m), a part of the second light-shielding portion 21e of the second hand wheel 20 corresponds to the detection position P sequentially. The undetected state by 13 continues four times.

  At this time, the second hand wheel 20 is rotated by two steps (step S7), the light emitting element 31 of the detector 13 is caused to emit light (step S8), and it is detected whether or not the light receiving element 32 has received the light from the light emitting element 31. Thus, it is determined whether or not the detection unit 13 has detected light (step S9). When light is detected by the detection unit 13 in step S9, the second hand wheel 20 is set to the reference position because the first circular hole 21a of the first light transmitting hole portion 21 of the second hand wheel 20 matches the detection position P. It is determined that the position is “00 second position”, the hand position is corrected, the second hand 2, the minute hand 3, and the hour hand 4 are returned to the current time (step S10), and the routine is shifted to the normal hand movement, and this process is terminated.

  In this case, in step S9, the second to third light transmitting hole portions 28 to 30 of the minute hand wheel 25, the hour hand wheel 27, and the intermediate wheel 23 are stopped in accordance with the detection position P of the detection unit 13. It is assumed that there is always light detection by the detection unit 13, but the second to third light transmitting hole portions 28 to 30 of the minute hand wheel 25, hour hand wheel 27, and intermediate wheel 23 are temporarily connected to the detection unit 13. If it does not correspond to the detection position P, there is no light detection by the detection unit 13, and the process proceeds to the minute position detection process described later.

Next, a basic minute hand position detection process for detecting the reference position of the minute hand 3 in the pointer type wristwatch will be described with reference to FIG.
This minute hand position detection process is to detect the reference position (00 minute position) of the minute hand wheel 25. That is, as shown in FIG. 11A, the second light transmission hole 28 of the minute hand wheel 25 and the fourth light transmission hole 30 of the intermediate wheel 23 coincide with the detection position P of the detection unit 13. It is to detect the position. In this case, it is assumed that any circular hole of the third light transmission hole 29 of the hour hand wheel 27 coincides with the detection position P of the detection unit 13.

  When the minute hand position detection process is started, the minute hand wheel 25 is rotated by one step (1 °) (step S12), the light emitting element 31 of the detection unit 13 is caused to emit light (step S13), and the light from the light emitting element 31 is received by the light receiving element. By detecting whether or not 32 has received light, it is determined whether or not light has been detected by the detector 13 (step S14). If there is no light detected by the detector 13, the minute hand wheel 25 is 360 ° (one rotation). The operation from step S12 to step S14 is repeated until it rotates (for one hour) (step S15).

  At this time, even if the minute hand wheel 25 rotates 360 ° (one hour for one rotation), if no light is detected by the detection unit 13, the first light transmission hole 21 of the second hand wheel 20 is detected by the detection unit 13. It is determined that the second hand wheel 20 does not correspond to P, and the second hand wheel 20 is rotated 30 steps (180 °), so that the first light transmitting hole portion 21 of the second hand wheel 20 corresponds to the detection position P of the detection unit 13 (step S16). . In this state, the operation from step S12 to step S15 is repeated until the minute hand wheel 25 rotates again by 360 ° (one hour for one rotation).

  If the detection unit 13 detects light in step S14, it is determined that the minute hand wheel 25 is at the reference position (00 minute position). At this time, it is necessary to confirm whether this determination is correct. That is, the minute hand wheel 25 and the intermediate wheel 23 rotate, and as shown in FIG. 11 (m), the intermediate wheel 23 rotates once to return to the reference position, and the minute hand wheel 25 rotates 12 steps to detect the detection position P. When manufacturing the accuracy such as assembling accuracy, the circular hole of the second light transmitting hole portion 28 provided in the minute hand wheel 25 and the circular hole of the fourth light transmitting hole portion 30 of the intermediate wheel 23 are shifted to 12 ° from the center. If there is an error, the light from the light emitting element 31 of the detection unit 13 is transmitted through the second light transmission hole 28 of the minute hand wheel 25 and the fourth light transmission hole 30 of the intermediate wheel 23 and the light receiving element 32 It may receive light.

  For this reason, 20 steps of the minute hand wheel 25 from the position where the light is detected by the detection unit 13 in step S14 (that is, the second light transmitting hole portion 28 of the minute hand wheel 25 is almost completely separated from the detection position P of the detection unit 13). Only the rotation angle of 14 ° or more) (step S17), the minute hand wheel 25 is fast-forwarded by 6 steps (step S18). Thereby, except the backlash in the meshing | engagement of the gear wheel of the minute hand wheel 25 and the intermediate wheel 23, the minute hand wheel 25 is made into the state which returned 14 steps from the position where the light detection by the detection part 13 was carried out.

  That is, the second light transmitting hole 28 of the minute hand wheel 25 is configured to be completely separated from the detection position P of the detecting unit 13 when the minute hand wheel 25 returns 14 steps in the opposite direction from the reference position. Is the premise. Then, the minute hand wheel 25 is rotated again by one step from the position where the minute hand wheel 25 is returned (step S19), the light emitting element 31 of the detection unit 13 is caused to emit light (step S20), and the light of the light emitting element 31 is received by the light receiving element 32. By detecting whether or not the light has been received, it is determined whether or not the detection unit 13 has detected light (step S21).

  If no light is detected by the detector 13 in step S21, the operations from step S19 to step S21 are repeated until the minute hand wheel 25 rotates 14 steps (step S22). At this time, the light detection by the detection unit 13 should always be performed in step S21. However, if there is no light detection, an error notification for notifying the hand position detection error by the stop position of the second hand 2 or a buzzer sound is executed ( Step S23). If there is light detection by the detection unit 13 in step S21, it is determined that the position where the light is detected is the reference position (00 minute position) of the minute hand wheel 25 (step S24), and this minute hand position detection process is performed. finish.

Next, a basic hour hand position detection process for detecting the reference position of the hour hand 4 in the pointer type wristwatch will be described with reference to FIG.
This hour hand position detection process is to detect the reference position (0 o'clock position) of the hour hand wheel 27. That is, as shown in FIG. 11A, the circular hole at the reference position in the third light transmission hole 29 of the hour hand wheel 27, the second light transmission hole 28 of the minute hand wheel 25, and the first of the intermediate wheel 23. The four light transmitting hole portion 30 detects a position that coincides with the detection position P of the detection portion 13. In this case, it is assumed that the minute hand wheel 25 is at the reference position, and the second hand wheel 20 of the first drive system 11 is such that the first light transmission hole portion 21 coincides with the detection position P of the detection unit 13.

  When the hour hand position detection process is started, the second light transmission hole portion 28 of the minute hand wheel 25 coincides with the detection position P of the detection unit 13 and the minute hand wheel 25 at the reference position is rotated by 360 ° to set the hour hand wheel 27 to 30. Rotate (step S25), cause the light emitting element 31 of the detector 13 to emit light (step S26), and detect whether the light receiving element 32 has received the light from the light emitting element 31, thereby It is determined whether or not the three light transmission holes 29 have been detected by the detection unit 13 corresponding to the detection position P of the detection unit 13 (step S27).

  At this time, eleven circular holes of the third light transmission hole portion 29 of the hour hand wheel 27 are provided at intervals of 30 °, and the fourth light shielding portion 29a is provided at the “11 o'clock position”. When the hour hand wheel 27 is rotated by 30 ° and the hour hand wheel 27 is rotated by 30 °, the third light is removed except for the fourth light-shielding portion 29a at the “11 o'clock position”, as shown in FIGS. As each circular hole of the transmission hole portion 29 sequentially corresponds to the detection position P, there is light detection by the detection portion 13. When light is detected by the detection unit 13 in step S27, the process returns to step S25, and after each circular hole of the third light transmission hole portion 29 of the hour hand wheel 27 sequentially corresponds to the detection position P, the hour hand wheel 27 The above operation is repeated until the fourth light shielding unit 29a cannot detect light by the detection unit 13 corresponding to the detection position P.

  Then, as shown in FIG. 11 (p), if the fourth light-shielding portion 29a of the hour hand wheel 27 is not detected by the detection unit 13 corresponding to the detection position P, the hour hand wheel 27 is set to the “11 o'clock position”. Then, the minute hand wheel 25 is further rotated 360 ° and the hour hand wheel 27 is rotated 30 ° (step S28), the light emitting element 31 of the detection unit 13 is caused to emit light (step S29), and the light from the light emitting element 31 is emitted. By detecting whether or not the light receiving element 32 has received light, it is determined whether or not light has been detected by the detection unit 13 (step S30).

  In this step S30, as shown in FIG. 11 (a), the third light transmission hole 29 of the “0 o'clock position” of the hour hand wheel 27 always corresponds to the detection position P of the detection unit 13, and the detection unit 13 Since there is light detection, it is confirmed that the hour hand wheel 27 is at the reference position of “0 o'clock position”, and this processing flow ends. In this step S30, since it is assumed that the first light transmission hole portion 21 of the second hand wheel 20 corresponds to the detection position P of the detection portion 13, light detection by the detection portion 13 should be sure. If there is no light detection, it is determined that the first light transmission hole 21 of the second hand wheel 20 does not correspond to the detection position P, and the process returns to the second hand position detection process described above.

Next, a basic three-hand position detection process for detecting the reference positions of the three hands of the second hand 2, the minute hand 3, and the hour hand 4 in this pointer-type wristwatch will be described with reference to FIGS.
This three-hand position detection process is a case where all the positions of the second hand 2, the minute hand 3, and the hour hand 4 are not known, and a process combining the second hand position detection process and the hour / minute hand position detection process described above is performed. . In this case, FIG. 21 shows steps S31 to S39 of the second hand position detection process, FIG. 22 shows steps S41 to S66 of the minute hand position detection process, and FIG. 23 shows steps S71 to S78 of the minute hand position detection process. 24 shows steps S80 to S87 of the hour hand position detection process.

  When this three-hand position detection process is started, since all the positions of the three hands of the second hand 2, the minute hand 3, and the hour hand 4 are not known, first, the second hand position detection process of FIG. 21 is executed. That is, the detection unit 13 clears the undetected number of undetected states that have already been detected last time, sets the undetected flag to “0” (step S31), rotates the second hand wheel 20 by two steps (step S32), The light emitting element 31 of the detection unit 13 is caused to emit light (step S33), and it is determined whether or not the detection unit 13 has detected light by detecting whether or not the light receiving element 32 has received the light of the light emitting element 31. (Step S34).

  At this time, all the rotational positions of the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 are not known, but the light receiving element 32 receives light from the light emitting element 31 of the detection unit 13, and light detection by the detection unit 13. If there is, the process returns to step S31, and the above operation is continued until one of the first to third light shielding parts 21d to 21f of the second hand wheel 20 closes the detection position P corresponding to the detection position P of the detection part 13. repeat.

  That is, when light is detected by the detection unit 13 in step S34, the first light transmission hole portion 21 of the second hand wheel 20, the second light transmission hole portion 28 of the minute hand wheel 25, and the third light transmission hole portion of the hour hand wheel 27. 29, all of the fourth light transmission hole portions 30 of the intermediate wheel 23 happen to coincide with the detection position P of the detection unit 13. At this time, the minute hand wheel 25 is the reference position of “00 minute position”. However, since the positions of the second hand wheel 20 and the hour hand wheel 27 are not yet known, the position of the second hand wheel 20 is first detected. For this reason, Step S31 to Step S34 until any one of the first to third light shielding portions 21d to 21f of the second hand wheel 20 corresponds to the detection position P of the detection portion 13 and no light is detected by the detection portion 13. Repeat the operation.

  When any of the first to third light shielding portions 21d to 21f of the second hand wheel 20 corresponds to the detection position P of the detection unit 13 in step S34 and light detection by the detection unit 13 stops, the detection unit 13 The undetected number of times is counted, “1” is set in the undetected flag (step S35), and it is determined whether or not the undetected number of times is four consecutive times (step S36).

  In step S36, the operation of steps S32 to S36 is repeated until the second light-shielding portion 21e of the second hand wheel 20 corresponds to the detection position P of the detection unit 13 and the number of undetected times by the detection unit 13 continues four times. When the number of undetected times by the detection unit 13 continues four times, the second hand wheel 20 is rotated two steps (step S37), and the light emitting element 31 of the detection unit 13 emits light (step S38). By detecting whether or not the light receiving element 32 has received light, it is determined whether or not there is light detection by the detection unit 13 (step S39).

  At this time, if light is detected by the detection unit 13 in step S39, the minute hand wheel 25 is at the “00 minute position” reference position, and the second light transmitting hole portion 28 of the minute hand wheel 25 and the third light of the hour hand wheel 27 are present. The first circular hole 21a of the first light transmission hole portion 21 of the second hand wheel 20 coincides with the detection position P of the detection unit 13 in a state where any one of the transmission hole portions 29 corresponds to the detection position P. Judge. Accordingly, it is determined that the second hand wheel 20 and the minute hand wheel 25 are at the reference position (00:00 position), and the process proceeds to an hour hand position detection process in step S80 described later.

  By the way, if no light is detected by the detection unit 13 in step S39, the first circular hole 21a of the first light transmission hole 21 of the second hand wheel 20 is temporarily detected as shown in FIG. 14B. Even if it corresponds to P, since the undetected state by the detection unit 13 continues five times, the second light transmission hole portion 28 of the minute hand wheel 25, the third light transmission hole portion 29 of the hour hand wheel 27, the middle It is determined that any of the fourth light transmission hole portions 30 of the car 23 is displaced from the detection position P, and the process proceeds to step S41 shown in FIG.

  In this minute hand position detection process, as shown in FIG. 22, the minute hand wheel 25 is rotated by one step (1 °) in step S41, and the light emitting element 31 of the detection unit 13 is caused to emit light (step S42). By detecting whether or not the light receiving element 32 has received light, it is determined whether or not there is light detection by the detection unit 13 (step S43). At this time, if the detection unit 13 does not detect light, the minute hand wheel 25 is rotated step by step to determine whether the minute hand wheel 25 has rotated 360 ° (step S44), and the minute hand wheel 25 rotates one time. Steps S41 to S43 are repeated.

  At this time, if light is detected by the detection unit 13 in step S43, the first light transmission hole 21 of the second hand wheel 20, the second light transmission hole 28 of the minute hand wheel 25, and the third of the hour hand wheel 27. All of the circular holes of the light transmission hole 29 and the fourth light transmission hole 30 of the intermediate wheel 23 coincide with the detection position P of the detection unit 13, and the minute hand wheel 25 and the hour hand wheel 27. It was out of place. Thereby, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later in order to confirm whether or not this determination is correct.

  However, even if the minute hand wheel 25 rotates 360 ° in step S44, if no light is detected by the detection unit 13 in step S43, the first light transmission hole of the second hand wheel 20 as shown in FIG. It is determined that the unit 21 does not correspond to the detection position P, the second hand wheel 20 is rotated 30 steps (180 °) (step S45), and the light emitting element 31 of the detection unit 13 is caused to emit light (step S46). By detecting whether or not the light receiving element 32 has received the light from the element 31, it is determined whether or not there is light detection by the detection unit 13 (step S47).

  At this time, if light is detected by the detection unit 13 in step S47, the first light transmission hole 21 of the second hand wheel 20, the second light transmission hole 28 of the minute hand wheel 25, and the third of the hour hand wheel 27. All of the circular holes of the light transmission hole 29 and the fourth light transmission hole 30 of the intermediate wheel 23 coincide with the detection position P of the detection unit 13, and the second hand wheel 20 is displaced. It will be. Also at this time, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later.

  However, even if the second hand wheel 20 is rotated 30 steps (180 °) in step S45, if no light is detected by the detection unit 13 in step S47, as shown in FIG. Even if the first light transmission hole portion 21 corresponds to the detection position P, it is determined that the second light transmission hole portion 28 of the minute hand wheel 25 is shifted from the detection position P, and the minute hand wheel 25 is rotated by one step. (Step S48).

  Then, the light emitting element 31 of the detection unit 13 is caused to emit light (step S49), and whether or not the light detection by the detection unit 13 is detected by detecting whether or not the light receiving element 32 receives the light of the light emitting element 31. Is determined (step S50). At this time, if no light is detected by the detection unit 13, the minute hand wheel 25 is rotated step by step to determine whether or not the minute hand wheel 25 has rotated 360 ° (step S51), and the minute hand wheel 25 rotates one time. Steps S48 to S50 are repeated.

  At this time, if light is detected by the detection unit 13 in step S50, the first light transmission hole 21 of the second hand wheel 20, the second light transmission hole 28 of the minute hand wheel 25, and the third light of the hour hand wheel 27. All of the circular holes of the transmission hole 29 and the fourth light transmission hole 30 of the intermediate wheel 23 coincide with the detection position P of the detection unit 13, and the minute hand wheel 25 is shifted. Become. Also at this time, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later.

  However, even if the minute hand wheel 25 rotates 360 ° in step S51, if no light is detected by the detection unit 13 in step S50, the first light of the second hand wheel 20 is temporarily assumed as shown in FIG. Even if the transmission hole 21, the second light transmission hole 28 of the minute hand wheel 25, and the fourth light transmission hole 30 of the intermediate wheel 23 correspond to the detection position P, the third light transmission hole 29 of the hour hand wheel 27. These circular holes are deviated from the detection position P, and it is determined that the fourth light shielding portion 29a of the hour hand wheel 27 corresponds to the detection position P.

  At this time, first, since it is not known whether the first light transmission hole portion 21 of the second hand wheel 20 corresponds to the detection position P, the second hand wheel 20 is rotated by 30 steps (180 °) (step S52). The light emitting element 31 is caused to emit light (step S53), and it is determined whether or not there is light detection by the detection unit 13 by detecting whether or not the light receiving element 32 has received the light of the light emitting element 31 (step S54). ).

  At this time, when light is detected by the detection unit 13, the first light transmission hole 21 of the second hand wheel 20, the second light transmission hole 28 of the minute hand wheel 25, and the third light transmission hole of the hour hand wheel 27. All of the circular holes 29 and the fourth light transmitting hole portion 30 of the intermediate wheel 23 coincide with the detection position P of the detection portion 13, and the fourth light shielding portion 29 a of the hour hand wheel 27 detects it. It does not correspond to the position P, and the second hand wheel 20 is shifted. Also at this time, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later.

  If no light is detected by the detection unit 13 in step S54, it is determined that the fourth light shielding portion 29a of the hour hand wheel 27 corresponds to the detection position P as shown in FIG. Detection is performed by rotating the wheel 25 by one step (step S55), causing the light emitting element 31 of the detection unit 13 to emit light (step S56), and detecting whether or not the light receiving element 32 has received the light of the light emitting element 31. It is determined whether or not there is light detection by the unit 13 (step S57). At this time, if the detection unit 13 does not detect light, the minute hand wheel 25 is rotated step by step to determine whether the minute hand wheel 25 has rotated 360 ° (step S58), and the minute hand wheel 25 rotates one time. Until then, the operations from step S55 to step S57 are repeated.

  When light is detected by the detection unit 13 in step S57, the first light transmission hole portion 21 of the second hand wheel 20, the second light transmission hole portion 28 of the minute hand wheel 25, and the third light transmission hole portion of the hour hand wheel 27. All of the circular holes 29 and the fourth light transmitting hole portion 30 of the intermediate wheel 23 coincide with the detection position P of the detection portion 13, and the fourth light shielding portion 29 a of the hour hand wheel 27 detects it. This does not correspond to the position P, and the minute hand wheel 25 is displaced. Also at this time, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later.

  In addition, even if the minute hand wheel 25 rotates 360 ° in step S58, if no light is detected by the detection unit 13 in step S57, the fourth light shielding portion 29a of the hour hand wheel 27 corresponds to the detection position P, and the hour hand wheel. 27 is assumed to be “11 o'clock position”. In order to confirm whether or not this assumption is correct, the second hand wheel 20 is rotated 30 steps (180 °) (step S59), the light emitting element 31 of the detection unit 13 is caused to emit light (step S60), and the light from the light emitting element 31 is emitted. By detecting whether or not the light receiving element 32 has received light, it is determined whether or not there is detection by the detection unit 13 (step S61).

  At this time, if there is detection by the detection unit 13, the first light transmission hole 21 of the second hand wheel 20, the second light transmission hole 28 of the minute hand wheel 25, and the third light transmission hole 29 of the hour hand wheel 27. Any one of the circular holes and the fourth light transmitting hole portion 30 of the intermediate wheel 23 coincide with the detection position P of the detection unit 13, and the hour hand wheel 27 is not "11 o'clock position" This means that the second hand wheel 20 has shifted. Also at this time, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the process proceeds to step S71 of the minute hand position confirmation process described later.

  If no light is detected by the detection unit 13 in step S61, it is determined that the fourth light blocking unit 29a of the hour hand wheel 27 corresponds to the detection position P, and the minute hand wheel 25 is rotated by one step (step S61). S62), the light emitting element 31 of the detection unit 13 is caused to emit light (step S63), and it is detected whether the light receiving element 32 has received the light of the light emitting element 31, thereby detecting whether the detection unit 13 detects light. Is determined (step S64).

  At this time, if no light is detected by the detection unit 13 in step S64, the minute hand wheel 25 is rotated step by step to determine whether the minute hand wheel 25 has rotated 360 ° (step S65). The operation from step S62 to step S64 is repeated until it rotates 360 °. Even if the operations from step S62 to step S64 are repeated, if no light is detected by the detection unit 13 in step S64, an error notification for notifying the hand position detection error by the stop position of the second hand 2 or a buzzer sound is executed. (Step S66). If the detection unit 13 detects light in step S64, it is determined that the hour hand wheel 27 is the reference position of “0 o'clock position” and the minute hand wheel 25 is in the reference position (00 minute position). The process proceeds to step S71 of the minute hand position confirmation process described later.

  By the way, in the minute hand position confirmation process, as shown in FIG. 23, the minute hand wheel 25 is moved 20 steps from the position where the light is detected by the detecting unit 13 (that is, the second light transmitting hole 28 of the minute hand wheel 25 is detected by the detecting unit 13 The rotation angle of 14 ° or more that is almost completely away from the detection position P is returned (step S71), and the minute hand wheel 25 is fast-forwarded by 6 steps (step S72). Thereby, except the backlash in the meshing | engagement of the gear wheel of the minute hand wheel 25 and the intermediate wheel 23, the minute hand wheel 25 is made into the state which returned 14 steps from the position where the light detection by the detection part 13 was carried out.

  That is, the minute hand wheel 25 is returned by 14 steps, which is a rotation angle of 12 ° or more that the second light transmission hole portion 28 of the minute hand wheel 25 is almost completely separated from the detection position P of the detection unit 13. The minute hand wheel 25 is again rotated by one step from this returned position (step S73), the light emitting element 31 of the detection unit 13 is caused to emit light (step S74), and whether or not the light receiving element 32 has received the light from the light emitting element 31 is determined. By detecting this, it is determined whether or not the detection unit 13 has detected light (step S75).

  At this time, if no light is detected by the detection unit 13 in step S75, the operations from step S73 to step S75 are repeated until the minute hand wheel 25 rotates 14 steps (step S76). In step S75, the light detection by the detection unit 13 is sure to be performed. However, if there is no light detection, an error notification informing the hand position detection error by the stop position of the second hand 2 or a buzzer sound is executed (step S75). S77). If there is light detection by the detection unit 13 in step S75, it is determined that the position where the light is detected is the reference position (00 minute position) of the minute hand wheel 25 (step S78).

  Also at this time, since it is not known whether the second hand wheel 20 is at the reference position (00 second position), the process returns to step S31 of the second hand position detection process, the second hand position detection process up to step S39 is executed, and the second hand wheel 20 is set as the reference. The position (00:00 position) is set, and the process proceeds to step S80 of the hour hand position detection process shown in FIG. In step S80 of this hour hand position detection process, since the second hand wheel 20 and the minute hand wheel 25 are at the reference position, the minute hand wheel 25 is rotated 360 ° and the hour hand wheel 27 is rotated 30 °. Then, the light emitting element 31 of the detection unit 13 is caused to emit light (step S81), and whether or not the light detection by the detection unit 13 is detected by detecting whether or not the light receiving element 32 receives the light of the light emitting element 31. Is determined (step 82).

  At this time, when there is light detection by the detection unit 13 every time the hour hand wheel 27 rotates by 30 °, each circular hole of the third light transmission hole portion 29 of the hour hand wheel 27 corresponds to the detection position P in order. Thus, the hour hand wheel 27 is in the hour position. Therefore, the process returns to step S80, and the operations from step S80 to step S82 are repeated until the fourth light shielding portion 29a at the 11 o'clock position of the hour hand wheel 27 corresponds to the detection position P. If no light is detected by the detection unit 13 in step S82, it is determined that the fourth light shielding unit 29a of the hour hand wheel 27 is at the “11 o'clock position” corresponding to the detection position P.

  In order to confirm that this judgment is correct, the minute hand wheel 25 is again rotated 360 ° and the hour hand wheel 27 is rotated 30 ° (step S83), and the light emitting element 31 of the detector 13 is caused to emit light (step S84). By detecting whether or not the light of the element 31 is received by the light receiving element 32, it is determined whether there is light detection by the detection unit 13 (step S85).

  At this time, if light is detected by the detection unit 13, the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 are all identified as being at the reference position (0:00:00 position), and the second hand 2, minute hand 3 Then, the hour hand 4 is set to the current time (step S86), the routine is shifted to normal operation, and this operation flow is finished. In step S85, there should be light detection by the detection unit 13. However, if there is no light detection, an error notification for notifying the hand position detection error by the stop position of the second hand 2 or a buzzer sound is executed ( Step S87).

Next, with reference to FIG. 25, it is confirmed whether the second hand, the minute hand 3, and the three hands of the hour hand are in alignment 5 minutes before the hour on the hour from 1 o'clock to 12 o'clock during normal hand movement, that is, every 55 minutes per hour. The needle position confirmation process to be performed will be described.
In this needle position confirmation process, detection by the detection unit 13 is performed every 55 minutes except 10:55 and 22:55.

  That is, it may be at every hour, but if it is every hour, it overlaps with various operations such as a time signal and an alarm. Therefore, it is desirable to perform the hand confirmation process several minutes before the hour. In this case, since the hour hand wheel 27 only rotates by 1 ° every 12 minutes, the third light transmission hole portion 29 does not completely move away from the detection position P even if the hour hand wheel 27 is deviated around 10 minutes on the hour. In this state, the detection unit 13 can detect light.

  Further, in this hand position confirmation process, detection by the detection unit 13 is performed every 55 minutes per hour, and when the detection unit 13 detects light, the hour hand 4 is considered to be in alignment, and the second hand 2 and the minute hand 3 are This is a process for confirming whether or not they are correct, and it is possible to confirm only the deviation of the minute hand 3 less than minus one hour. Further, in this hand position confirmation process, when 10 seconds have elapsed, the minute hand wheel 25 rotates by one step, and the intermediate wheel 23 rotates by 30 ° to block the detection position P of the detection unit 13 for 10 seconds. It is necessary to confirm the displacement of the second hand 2 within a second.

  For this reason, the needle position confirmation process starts at 55 minutes per hour, causes the light emitting element 31 of the detection unit 13 to emit light (step S90), and determines whether the light receiving element 32 has received the light from the light emitting element 31 or not. By detecting whether or not light is detected by the detection unit 13 (step S91), if there is no light detection by the detection unit 13, at least one of the second hand 2, the minute hand 3, and the hour hand 3 does not match. Judgment is made, and the process proceeds to the above-described 3-needle position detection process.

  Further, if there is light detection by the detection unit 13, it is determined that the first light transmission hole portion 21 of the second hand wheel 20 corresponds to the detection position P of the detection unit 13, and the number of undetected times by the detection unit 13 until the previous time. Is cleared and the undetected flag is set to “0” (step S92), the second hand wheel 20 is normally rotated by one step (6 °) to move the second hand 2 normally (step S93), and the second hand wheel 20 has two steps ( It is determined whether or not it has rotated (12 °) (step S94). In other words, the first circular hole 21a of the second hand wheel 20 is not completely separated from the detection position P of the detection unit 13 by only rotating the second hand wheel 20 by one step (6 °) of normal hand movement. The light detection by the detection unit 13 is performed every time.

  If the second hand wheel 20 has not been rotated by two steps in step S94, the second hand 2 is normally moved by one step (6 °) until the second hand wheel 20 is rotated by two steps, and when the second hand wheel 20 is rotated by two steps, It is determined whether 2 is any of the 2 second position, the 4 second position, the 6 second position, and the 8 second position (step S95). In this step S95, since the first stepping motor 17 may not operate correctly due to external factors such as a magnetic field, the second hand 2 may not be in any of the 2 second position, the 4 second position, the 6 second position, and the 8 second position. . In this case, an error notification for notifying the hand position detection error by the stop position of the second hand 2 or a buzzer sound is executed (step S96).

  If it is determined in step S95 that the second hand 2 is in any of the 2 second position, the 4 second position, the 6 second position, and the 8 second position without receiving external factors such as a magnetic field, the light emitting element 31 of the detection unit 13 is turned on. Light is emitted (step S97), and by detecting whether or not the light receiving element 32 has received the light from the light emitting element 31, it is determined whether or not the detection unit 13 has detected light (step S98). At this time, if light is detected by the detection unit 13, any one of the first circular hole 21 a, the second and third long holes 21 b, 21 c of the first light transmission hole 21 of the second hand wheel 20 is the detection unit 13. Since it coincides with the detection position P, it is determined that the second hand wheel 20 is not suitable, and the process proceeds to the above-described three-hand position detection process.

  If no light is detected by the detection unit 13 in step S98, the first to third light shielding portions 21d to 21f of the second hand wheel 20 are at the detection position P as shown in FIG. The number of undetected times by the detection unit 13 is counted and the undetected flag is set to “1” (step S99), and it is determined whether or not this number of undetected times continues three times (step S99). S100). At this time, if the number of undetected times does not continue three times, the process returns to step S93, the second hand 2 is normally moved, and the operations up to step S100 are repeated.

  Further, in step S100, when 6 seconds have passed from 55 minutes per hour as shown in FIG. 15B to the state of FIG. It is determined that either the light shielding part 21d or the second light shielding part 21e corresponds to the detection position P, and the second hand 2 is normally moved by rotating the second hand wheel 20 by one step (6 °) (step S101). Then, it is determined whether or not the second hand wheel 20 has next rotated two steps (step S102), and the second hand 2 is normally moved until the second hand wheel 20 has rotated two steps.

  Then, when the second hand wheel 20 rotates two steps, the light emitting element 31 of the detection unit 13 is caused to emit light (step S103), and whether or not the light receiving element 32 receives the light of the light emitting element 31 is detected by 55 every hour. When 8 seconds have elapsed from the minute, it is determined whether or not the detection unit 13 has detected light (step S104). At this time, if no light is detected by the detection unit 3, the second light-shielding unit 21e of the second hand wheel 20 corresponds to the detection position P, and it is determined that the second hand wheel 20 is not in position, as described above. The process proceeds to the 3-needle position detection process. Further, in step S104, as shown in FIG. 15E, if the detection unit 13 detects light, the detection position P of the detection unit 13 corresponds to a part of the second long hole 21b of the second hand wheel 20. As a result, it is determined that the rotation position of the second hand wheel 20 is correct, and the operation is shifted to normal hand movement, and this operation flow is ended.

Next, error processing for stopping the needle position detection processing when needle position detection errors occur continuously will be described with reference to FIG.
This error process proceeds to the three-needle position detection process in steps S91, S98, and S104 in the above-described 55-minute needle position confirmation process described above, and a needle position detection error is detected in the three-needle position detection process and the needle position confirmation process. This is a process for stopping the detection of the hand position until the next 10:55 or 22:55 when the error occurs.

  That is, when the error process starts, the needle position confirmation process in steps S90 to S104 is performed (step S110), and the process proceeds to the three-needle position detection process in steps S91, S98, and S104. It is determined whether or not a needle position detection error has occurred in the needle position confirmation process (step S111). If it is determined in step S111 that a needle position detection error has not occurred, the error counter is cleared and the counter is set to “0” (step S112), and the needle position confirmation process is performed 55 minutes per hour as usual (step S112). S113).

  If it is determined in step S111 that a needle position detection error has occurred, the needle position detection error is counted and the counter is set to “+1” (step S114), and the needle position detection error is determined in advance. It is determined whether the number of occurrences (three times in this embodiment) has occurred continuously (step S115). At this time, if the needle position detection error does not occur three times continuously, the process returns to step S110, and the above operation is repeated until the needle position detection error continues three times.

  In step S115, when it is determined that the needle position detection error has occurred three times in succession, the contents of the needle position detection error are recorded in the RAM 37, and then a predetermined time (in this embodiment, 10 o'clock). 55 minutes), the needle position detection process, which is the needle position confirmation process in steps S90 to S104 in FIG. 25, is stopped (step S116), and the needle position is corrected according to the operation of the push button switch SW. Then, automatic correction is performed again (step S117), and this error processing is terminated.

Next, error display for displaying a needle position detection error will be described with reference to FIG.
This error display is performed by simultaneously operating three push button switches SW among a plurality of push button switches SW (see FIG. 17) provided on the side surface of the TK of the watch case in the normal hand movement mode state. And the contents of the needle position detection error recorded in the RAM 37 are displayed in this error display mode. In this error display mode, as shown in FIG. 27, various errors are numbered, and the second hand 2 is stopped at a predetermined position according to the number, thereby expressing the contents of the hand position detection error. Yes. In this case, the contents of the needle position detection error include error values: No. 0 to No. 8, D No. and E No.

  For example, the error value: No. 0 is when the hand position is correctly detected. When the error value is No. 0, the second hand 2 is stopped at the position of 55 seconds. Further, the error value: No. 1 may be erroneously determined when the minute hand 3 is not in the normal position and 12 steps have been advanced in the minute hand position confirmation processing of FIG. Each section E1 of S73 to S77 is a needle position detection error (step S77) in the case where there is no light detection even if the minute hand 3 is sent back step by step after returning 14 steps and sent to 14 steps. When the error value is No. 1, the second hand 2 is stopped at the position of 3 seconds.

  Error value: No. 2 is a step of confirming that the second hand 2 makes one round in 60 steps in the three-hand position detection process of FIG. 21 and that there is one place where no light is detected continuously every four steps. This is an interval E2 from S31 to S36, and is a hand position detection error in the case where there is no light detection four times consecutively even if the second hand 2 moves 60 steps. When the error value is No. 2, the second hand 2 is stopped at the 6-second position.

  The error value: No. 3 is that there are 11 third light transmitting hole portions 29 of the hour hand wheel 27 at intervals of 30 ° in the three-hand position detecting process of FIG. 24, and the minute hand 3 is 360 ° at 30 ° intervals. This is a section E3 from step S80 to step S85 in which light detection is confirmed every rotation, and is a needle position detection error (step S87) when light detection has been performed 12 times in succession. When this error value is No. 3, the second hand 2 is stopped at the 9-second position.

  The error value: No. 4 is a flag A that is set on the RAM 37 when it is the section E4 in steps S41 to S51 in the three-needle position detection process of FIG. 22, and steps S52 to S3 in the three-needle position detection process of FIG. In the state where the flag B set on the RAM 37 in the section E5 of step S66 is set on the RAM 37, there is no light detection in step S39 of FIG. This is a hand position detection error in the section E6 that reaches Step S41. When this error value is No. 4, the second hand 2 is stopped at the 12-second position.

  The error value: No. 5 is a section E7 from step S93 to step S98 in which it is confirmed whether the second hand 2 has moved two steps in the hand position confirmation process at 55 minutes per hour during normal hand movement in FIG. An output terminal for outputting a pulse to the first stepping motor 17 is determined, but this is a needle position detection error (step S96) when the first stepping motor 17 does not operate correctly due to an external factor such as a magnetic field. When the error value is No. 5, the second hand 2 is stopped at the 15-second position.

  Error value: No. 6 is the section E5 from step S52 to step S66 in the three-needle position detection process of FIG. 22, and after 11 consecutive light detections, there is no next light detection. An error (step S66). When the error value is No. 6, the second hand 2 is stopped at the 18-second position. Error value: No. 7 is the case where there is no light detection in the three-hand position detection process of FIGS. 21 to 24 and the hand position confirmation process of 55 every hour in FIG. 25, and any of the second hand 2, the minute hand 3 and the hour hand 4 This is a needle position detection error when the needle is caught and cannot be moved, or when the device is broken. When this error value is No. 7, the second hand 2 is stopped at the 21-second position.

  Error value: No. 8 is a time when a needle position detection error occurs and 1 o'clock is detected in the three-needle position detection process in FIGS. 21 to 24 and the needle position confirmation process in FIG. This is a hand position detection error in the case of 00 minutes 00 seconds. When this error value is No. 8, the second hand 2 is stopped at the 24 second position. The error values: No. 1 to No. 8 are needle position detection errors due to the gear system.

  Error value: No. D is a needle position detection error of the detection unit 13 and one of the light emitting element 31 and the light receiving element 32 is broken and light detection is not possible. When this error value: D number The second hand 2 is stopped at the 39-second position. Error value: No. E is a needle position detection error on the circuit board, and the needle position cannot be detected due to breakage of CPU 35 such as LSI or poor soldering of electronic components. If so, the second hand 2 is stopped at the 42-second position. These error values: No. D and No. E are needle position detection errors by the circuit system.

Next, referring to FIG. 28, a description will be given of the hand control process when the wristwatch is not used because it is placed in a dark place.
When the hand stop process starts, it is determined whether or not the outside of the watch case 1 is in a dark state by determining whether or not the solar panel 9 receives external light and is generating power (step S120). . At this time, if the solar panel 9 receives external light and determines that the outside of the wristwatch case 1 is not in a dark state, it is determined that the wristwatch is being used and normal hand movement is performed (step S121).

  If it is determined that the solar panel 9 does not receive external light and the outside is in a dark state, it is determined whether or not it is a time zone between 22:00 and 5:50 (step) S122). At this time, if it is not a time zone between 22:00 and 5:50, it is determined that the wristwatch is being used and normal hand movement is performed (step S121). And if it is a time zone between 22:00 and 5:50, it will be dark whether the solar panel 9 receives external light and is generating electric power every predetermined time, for example, every 10 minutes. It is determined whether or not the state has continued for a predetermined time, for example, about 61 minutes to 70 minutes or more (step S123).

  At this time, if the dark state does not continue for about 61 minutes to 70 minutes or longer, it is determined that the wristwatch is being used, and normal hand movement is performed (step S121). If the dark state continues for about 61 minutes to 70 minutes or longer, it is determined that the sleep state is not using the wristwatch (step S124). In this sleep state, only the second hand 2 is moved to the reference position (00 second position) and stopped, and the minute hand 3 and hour hand 4 are normally moved. Then, in this sleep state, it is determined whether or not the solar panel 9 continues to be in a dark state without receiving external light for about 6 to 7 days (step S125).

  At this time, if the solar panel 9 receives external light for about 6 to 7 days and the dark state does not continue, it is determined that the solar panel 9 is in the sleep state and returns to step S124 to repeat the above operation. Also, if it is determined that the solar panel 9 has not received external light for about 6 to 7 days and is still in a dark state, it is determined that the wristwatch has not been used for a long period of time and the wristwatch is used. It is determined that the state is a complete sleep state in which the hand movement for a long time until the start is stopped (step S126). In this complete sleep state, the second hand 2, the minute hand 3, and the hour hand 4 are all moved to the reference position (0 hour 00 minute 00 second position) and stopped.

Next, with reference to FIG. 29, the hourly hand position detection process in a state where the outside of the watch case 1 is dark will be described.
When this hand position detection process is started, it is determined whether or not it is 5 minutes before every hour (step S130). At this time, if it is not 5 minutes before the hour, this operation flow is terminated without performing the hand position detection process. If it is 5 minutes before the hour, the dark sleep state continues for a long time. It is determined whether or not it is in a state (step S131).

  At this time, if it is in the complete sleep state, this operation flow is terminated without performing the hand position detection process. If it is not in the complete sleep state, the dark state is between 61 minutes and 5:50 until 61 minutes. It is determined whether or not the sleep state is continued for about 70 minutes (step S132). If it is not in the sleep state in this step S132, it is determined that it is in the normal hand movement state, the hand position is detected 5 minutes before every hour (step S133), and this operation flow is ended.

  If it is determined in step S132 that the mobile phone is in the sleep state, the second hand 2 is moved to the reference position (00 second position) and stopped (step S134). In this state, when it is five minutes before the hour, the minute hand 3 and hour hand 4 are moved to detect the hand position (step S135). In this step S135, since the second hand 2 is stopped at the reference position (00 second position), only the minute hand 3 and the hour hand 4 are moved to detect the hand position. If the hand position is correct, this operation flow is ended. If the needle position cannot be detected, the process proceeds to complete correction and the operation flow is terminated.

Next, with reference to FIG. 30, error processing when the hand position cannot be detected in a state where the outside of the watch case 1 is dark will be described.
When this error process starts, it is determined whether or not it is 5 minutes before the hour (step S140). If it is not 5 minutes before the hour, this operation flow is performed without performing the hand position detection process. If it is 5 minutes before every hour, it is determined whether a predetermined time or a predetermined number of days have passed (step S141).

  In this step S141, it is determined whether or not a predetermined time is 10:55 or 22:55, or whether or not a predetermined number of days on the 3rd or 7th has passed. If it is minutes, or if 3 days or 7 days have passed, the error counter A is cleared (step S142), and it is determined whether or not it is a complete sleep state in which a dark state continues for a long time ( Step S143). In step S141, if it is not 10:55 or 22:55, or if 3 days or 7 days have not elapsed, the process proceeds to step S143, and it is determined whether or not it is in a complete sleep state.

  In this step S143, if the solar panel 9 has not received external light continuously for about 6 to 7 days and has been in a dark state for a long period of time, it is determined that the wristwatch is not being used and complete sleep It is determined that it is in a state, and all the three hands of the second hand 2, the minute hand 3, and the hour hand 4 are moved to the reference position (0 hour 00 minute 00 second position) and stopped, and this operation flow is completed. Also, in this step S143, if the solar panel 9 receives external light for about 6 to 7 days and the dark state does not continue, it is determined that the solar panel 9 is not in a complete sleep state, and whether or not it is in a sleep state. Judgment is made (step S144).

  In this step S144, it is determined whether or not the solar panel 9 receives external light between about 61 minutes and 70 minutes every 10 minutes in the time zone from 22:00 to 5:50, and the dark state Is not continued for about 61 minutes to 70 minutes, it is determined that the wristwatch is being used, normal hand position detection processing is performed 5 minutes before every hour (step S145), and this operation flow is ended. To do. If the dark state continues for about 61 minutes to 70 minutes or more, it is determined as the sleep state, only the second hand 2 is moved to the reference position (00 second position) and stopped, and the minute hand 3 and hour hand 4 are moved normally. Then, it is determined whether or not the error counter A is equal to or greater than a predetermined number of times, for example, 3 times (step S146).

  In this step S146, if the error counter A is equal to or greater than the predetermined number of times, the second hand 2, the minute hand 3 and the hour hand 4 are moved to the reference position and stopped, without detecting the hand position 5 minutes before every hour, This operation flow ends. If the error counter A is not greater than or equal to the predetermined number in step S146, the second hand, the minute hand 3, and the hour hand 4 are moved to detect the hand position 5 minutes before the hour (step S147). If the needle position cannot be detected in step S147, complete correction is performed to determine whether there is a problem with the needle position (step S148). In step S148, if the needle position is correct and there is no problem, the operation flow is terminated. In step S148, if the needle position cannot be detected and there is a problem, a needle position detection error occurs, and "1" is added to error counter A (step S149), and this operation flow is terminated.

  By the way, this hand position detecting device includes a solar panel 9 or a push button switch SW as sleep canceling means for canceling a sleep state and a complete sleep state, and the solar panel 9 receives external light and generates power, thereby producing a wristwatch case. 1 is determined not to be in a dark state, the sleep state and the complete sleep state are canceled, and when the push button switch SW is operated, it is determined that the wristwatch is used, and the sleep state and the complete sleep state are set. It is configured to release.

  As described above, according to the hand position detecting device in the pointer type wristwatch, the solar panel 9 as the light / darkness determining means determines that the outside of the wristwatch case 1 is in the dark state, and the dark state is determined in advance. When it is determined that it is a sleep state in which the wristwatch is not used by the dark state detection means (CPU 35, step S120 to step S124) when it has continued for a time, for example, 61 minutes to 70 minutes, and this sleep state is determined. Further, at least the second hand 2 of the second hand 2, the minute hand 3, and the hour hand 4 is moved to the reference position (00 second position) by the control of the hand movement stop control means (CPU 35, step S124 to step S135) and stopped. The position of the minute hand 3 and the hour hand 4 is detected by the hand position detecting means (CPU 35, step S35 to step S87). And by, when not in use the watch, to simplify the hand position detection, it is possible to prevent battery drain due to hand position detection.

  In this case, the hand position detecting means (CPU 35, steps S35 to S87) is in a state where the second hand 2 is stopped at the reference position (00 second position) by the control of the hand movement stop control means (CPU 35, steps S124 to step S135). In this case, the minute hand 3 and the hour hand 4 are always correctly operated even in a sleep state where the wristwatch is not used by detecting the positions of the minute hand 3 and the hour hand 4 every predetermined time, for example, every five minutes before the hour. Thus, when the sleep state is released, the second hand 2 can be quickly moved to the current time, and the accurate current time can be known.

  Further, according to this hand position detecting device, the second hand 2 and the minute hand 3 are detected by the hand position detecting means while the second hand 2 is stopped at the reference position by the control of the hand movement stop control means (CPU 35, steps S124 to S135). When each position of the hour hand 4 cannot be detected, when the number of times the hour hand 4 cannot be detected is determined a predetermined number of times, for example, three consecutive times, the detection of the hand position by the needle position detecting means is determined in advance. By providing a needle position detection stop control means (step S140, step S149) for stopping at a certain time, for example, 10:55 or 22:55, or a stop time until 3 or 7 days elapses. If the position cannot be detected, the needle position detection process will not be repeated unnecessarily many times. Worn can be prevented.

  Further, according to this hand position detection device, the dark state has continued for several days, for example, 6 to 7 days after being determined to be dark by the dark state detection means (CPU 35, steps S120 to S124). In this case, it is determined that the wristwatch is in a completely sleep state that has not been used for a long time, and the second hand, the minute hand 3, and the hour hand 4 are all moved to the reference position (00:00:00 position). Since long-term hand movement stop control means (CPU 35, step S140 to step S149) for stopping until starting is provided, battery consumption can be largely prevented when the wristwatch is not used for a long time.

  Furthermore, according to this hand position detecting device, the second hand 2 stopped by the control of the needle movement stop control means (CPU 35, steps S124 to S135) or the long-term hand movement stop control means (CPU 35, steps S140 to S149). ) Starts use of the wristwatch by providing hand stop release means (solar panel 9 or pushbutton switch SW) for releasing all hands of the second hand 2, minute hand 3 and hour hand 4 stopped by the control of When doing so, the stop state of the pointer can be easily and quickly released.

  For example, when a wristwatch is attached to an arm and moved to a bright place, the solar panel 9 receives external light and generates power, thereby judging that the wristwatch is being used, and the second hand, the minute hand 3 and the hour hand 4 being stopped. Is quickly released, and the second hand 2, the minute hand 3, and the hour hand 4 can be moved. Further, when the push button switch SW is operated, it is determined that the wristwatch is being used, the stop state of the second hand 2, the minute hand 3, and the hour hand 4 is quickly released, and the second hand 2, the minute hand 3, and the hour hand 4 are moved. be able to.

(First modification)
In the above embodiment, the minute hand wheel 25 rotates by one step so that one circular hole of the second light transmission hole portion 28 corresponds to one circular hole of the fourth light transmission hole portion 30 of the intermediate wheel 23. Then, the minute hand wheel 25 is returned 20 steps from the position where the light is detected by the detection unit 13, and the minute hand wheel 25 is fast-forwarded 6 steps from the returned position to finally return 14 steps. Although the minute hand wheel 25 is rotated again step by step, the case where it is provided with the minute hand position detecting means for determining that the position where the light is first detected by the detecting unit 13 is the reference position of the minute hand wheel 25 has been described. For example, the minute hand position detecting means of the first modified example shown in FIG. 31 may be used.

  That is, as shown in FIG. 28, the minute hand position detecting means of the first modified example clears the number of steps of the minute hand wheel 25 that has already been counted and sets the counter to “0” (S = 0). ) (Step S150), the minute hand wheel 25 is rotated by one step (1 °) (step S151), and the number of steps of the minute hand wheel 25 is counted by a counter (S = S + 1) (step S152). The light emitting element 31 is caused to emit light (step S153), and it is determined whether or not the detection unit 13 has detected light by detecting whether or not the light receiving element 32 has received the light from the light emitting element 31 (step S154). If no light is detected by the detection unit 13, the operation from step S151 to step S124 is performed until the minute hand wheel 25 rotates 360 ° (one hour for one rotation). Is repeated (step S155).

  At this time, even if the minute hand wheel 25 rotates 360 ° (one hour for one rotation), if no light is detected by the detection unit 13, the first light transmission hole 21 of the second hand wheel 20 is detected by the detection unit 13. The second hand wheel 20 is rotated by 30 steps (180 °), and the first light transmitting hole portion 21 of the second hand wheel 20 is made to correspond to the detection position P of the detection unit 13 (step S156). Returning to step S150, the number of steps of the minute hand wheel 25 that has already been counted is cleared, the counter is set to “0”, and the minute hand wheel 25 is rotated one step at a time until rotating 360 ° (one hour for one rotation). The operations from step S151 to step S155 are repeated.

  If the detection unit 13 detects light in step S124, it is determined that the minute hand wheel 25 is at the reference position (00 minute position), and the number of steps of the minute hand wheel 25 counted so far is recorded in the RAM 37. It is determined whether the number of steps is a predetermined number of steps, that is, within 12 steps (S ≦ 12) (step S157). That is, when the minute hand wheel 25 performs 12 steps, the second light transmission hole 28 is almost completely separated from the detection position P of the detection unit 13, but due to manufacturing errors such as assembly accuracy, Detection can occur.

  For this reason, if the number of steps of the minute hand wheel 25 when the detection unit 13 detects light in step S127 is within 12 steps, it is confirmed whether or not it is correct to determine that the minute hand wheel 25 is at the reference position. The minute hand wheel 25 is returned by 12 steps or more (12 ° or more) from the position where the light is detected by the detection unit 13 in step S157 (step S158), and the second light transmitting hole portion 28 of the minute hand wheel 25 is detected. It is separated from the detection position P of the part 13 almost completely. The minute hand wheel 25 is again rotated by one step from the returned position (step S159), the light emitting element 31 of the detection unit 13 is caused to emit light (step S160), and whether or not the light receiving element 32 has received the light of the light emitting element 31. By detecting this, it is determined whether or not the detection unit 13 has detected light (step S161).

  If no light is detected by the detection unit 13 in step S161, the operation from step S158 to step S161 is repeated until the minute hand wheel 25 rotates 12 steps or more (step S162). At this time, if the minute hand wheel 25 rotates 12 steps in step S162, there should be light detection by the detection unit 13 in step S161. However, if there is no light detection, a hand position detection error is indicated as a stop of the second hand 2. Error notification informed by position, buzzer sound, etc. is executed (step S163). If there is light detection by the detection unit 13 in step S161, the position where the light is detected is determined to be the reference position (00 minute position) of the minute hand wheel 25 (step S164), and this minute hand position detection process is performed. finish.

  By the way, when it is determined in step S157 that the number of steps of the minute hand wheel 25 is equal to or greater than a predetermined step, that is, 12 steps or more, the intermediate wheel 23 is rotated once or more and the second light transmission hole portion 28 of the minute hand wheel 25 is 12 °. Since the fourth light transmission hole 30 of the intermediate wheel 23 and the second light transmission hole 28 of the minute hand wheel 25 coincide with the detection position P of the detection unit 13 after the rotational movement as described above, FIG. 11), the minute hand position confirmation from step S158 to step S163 described above is not affected by manufacturing errors such as assembly accuracy. The process is omitted, and the position where light is detected by the detection unit 13 in step S154 is determined as the reference position (00 minute position) in step S164, and the minute hand position detection process is terminated.

  Thus, according to the needle position detecting device of the first modification, the counting means (CPU 35, step S152) for counting the number of steps when the minute hand wheel 25 rotates one step at a time, and the minute hand wheel 25 is one step. The storage means (RAM 37) for storing the number of steps of the minute hand wheel 25 when the detection part 13 which is the light transmission hole part detecting means detects light and rotates, and the detection part even if the minute hand wheel 25 rotates once. 13 is provided with reset means (CPU 35, step S150) for resetting the counting means when there is no light detection by 13, so that the second light transmitting hole 28 of the minute hand wheel 25 is not detected by the detection section 13. When the second hand wheel 20 blocks the detection position P of the detection unit 13, the reset means can clear and reset the count number of the count means. It is possible to accurately count the number of steps of the minute hand wheel 25 by the count means, and by storing the count number in the storage means, it is determined whether or not the count number stored in the storage means is a predetermined number of steps. can do.

  In this case, when the number of steps of the minute hand wheel 25 stored in the storage means (RAM 37) is equal to or greater than a predetermined step (12 steps), the processes by the minute hand returning means and the minute hand position determining means are omitted, and the detection unit 13 has already been omitted. The position of the minute hand wheel 25 stored in the RAM 37 can be obtained by further providing a minute hand position determining means (CPU 35, step S157) for determining the position where the light has been detected by the hand as the reference position. When it is determined that the predetermined number of steps or more, that is, 12 steps or more, the intermediate wheel 23 makes one rotation or more, and after the second light transmission hole portion 28 of the minute hand wheel 25 rotates by 12 ° or more, the fourth wheel of the intermediate wheel 23 is obtained. Since the light transmission hole 30 and the second light transmission hole 28 of the minute wheel 25 coincide with the detection position P of the detection unit 13, an unnecessary confirmation operation of the minute wheel 25, Be omitted respective processing by rounding the minute hand return means and the center hand position determining means (step S128~ step S163), the reference position in the center wheel 25 can be accurately specified.

(Second modification)
By the way, in the said embodiment, although the 2nd, 3rd long hole 21b, 21c of the 1st light transmissive hole part 21 was each formed in the arc-shaped continuous long hole in the second hand wheel 20 was described, it is not restricted to this. Instead, for example, a second modification as shown in FIG. 32 may be used.
That is, as shown in FIG. 32, the second hand wheel 20 of the second modified example divides the second long hole 21b of the first light transmission hole portion 21 into two long holes 40a and 40b, and the third long hole 20b. 21c is also divided into two long holes 41a and 41b.

  In this case, the long hole 40a adjacent to the first circular hole 21a in the second long hole 21b is an interval of about 48 ° to 96 ° with respect to the first circular hole 21a, that is, five times the first circular hole 21a. The long hole 40b provided on the opposite side of the first circular hole 21a in the second long hole 21b is based on the first circular hole 21a. Thus, they are provided at intervals of about 120 ° to 168 °, that is, about five times as long as the first circular hole 21a (width of about 60 ° with respect to the circumference). A fifth light shielding part 42 is provided between the two long holes 40a, 40b of the second long hole 21b. The fifth light shielding part 42 is the length of the third long hole 21b located on the diagonal line. It is provided so as to correspond to a part of the hole 41a.

  Further, the long hole 41a adjacent to the first circular hole 21a in the third long hole 21c is an interval of about 60 ° to 96 ° with respect to the first circular hole 21a, that is, four times the first circular hole 21a. The long hole 41b located on the opposite side to the first circular hole 21a in the third long hole 21c is provided on the basis of the first circular hole 21a. Thus, they are provided at intervals of about 120 ° to 168 °, that is, about five times as long as the first circular hole 21a (width of about 60 ° with respect to the circumference). A sixth light shielding part 43 is provided between the two long holes 41a and 41b of the third long hole 21b. The sixth light shielding part 43 is the length of the second long hole 21b located on the diagonal line. It is provided so as to correspond to a part of the hole 41a.

  Further, between the first circular hole 21a at the reference position and the long hole 40a of the second long hole 21b adjacent to the first circular hole 21a, a first light shielding portion 21d is provided as in the above-described embodiment, and the reference position The second light shielding portion 21e is also provided between the first circular hole 21a and the long hole 41a of the third long hole 21c adjacent to the first circular hole 21a, and the first circular hole 21a. Similarly to the above-described embodiment, the second light shielding portion 21e is provided between the long hole 40b of the second long hole 21b and the long hole 41b of the third long hole 21c located on the diagonal line.

  Also in this case, the first light-shielding portion 21d has an interval of about 48 ° with respect to the first circular hole 21a, that is, an interval of about three times the first circular hole 21a (a width of about 36 ° with respect to the circumference). And is configured to correspond to the long hole 41b of the third long hole 21c located on the diagonal line. The second light-shielding portions 21e are provided at an interval of about 60 ° with respect to the first circular hole 21a, that is, an interval of about four times the width of the first circular hole 21a (a width of about 48 ° with respect to the circumference). The second long hole 21b located on the diagonal line is configured to correspond to the long hole 40b. The third, fifth, and sixth light shielding portions 21f, 42, and 43 are provided with approximately the same size as the first circular hole 21a, and the first circular hole 21a and the third long hole 21c that are located on the diagonal line thereof. The long holes 41a and the long holes 40a of the second long holes 21b correspond to the long holes 41a.

  Even in such a second hand wheel 20, in a state where any one of the first to third, fifth, and sixth light shielding portions 21 d to 21 f, 42, and 43 corresponds to the detection position P of the detection unit 13, When the second hand wheel 20 is rotated by 30 steps (180 °), the first circular hole 21a of the first light transmission hole 21 and the two long holes 40a of the second long hole 21b and the third long hole 21c are always 2 Since one of the two long holes 41a and 41b is configured to correspond to the detection position P of the detection unit 13, in addition to the same function and effect as the above-described embodiment, in particular, the second long hole 21b has two long holes. The third long hole 21c is also divided into two long holes 41a, 41b, and the fifth long hole 40a, 40b and the long hole 41a, 41b are divided into fifth, Since the sixth light-shielding portions 42 and 43 are provided, Than that of the embodiment, it is possible to further increase the strength of the seconds wheel 20.

(Third Modification)
In the above embodiment and the second modification thereof, the distance between the second long hole 21b of the first light transmission hole portion 21 and the first circular hole 21a at the reference position, that is, the first light shielding portion 21d is the first circular hole. With reference to 21a, the interval is set to about 48 °, that is, about three times the first circular hole 21a (width about 36 ° with respect to the circumference), and the third elongated hole 21c of the first light transmitting hole portion 21 The distance from the first circular hole 21a at the reference position, that is, the second light shielding portion 21e is about 60 ° from the first circular hole 21a, that is, about four times the first circular hole 21a (48 with respect to the circumference). However, the present invention is not limited to this, and a third modification shown in FIG. 33 may be used.

  That is, in the third modification, as shown in FIG. 33, the distance between the second long hole 21b of the first light transmission hole portion 21 and the first circular hole 21a at the reference position, that is, the first light shielding portion 21d is With reference to one circular hole 21a, an interval of about 36 °, that is, about twice the first circular hole 21a (width of about 24 ° with respect to the circumference) is set, and the third length of the first light transmitting hole portion 21 is set. The distance between the hole 21c and the first circular hole 21a at the reference position, that is, the second light-shielding portion 21e is about 48 ° with respect to the first circular hole 21a, that is, about three times as large as the first circular hole 21a. The width is set to about 36 ° with respect to the circumference.

  In this case, the second long hole 21b is divided into two long holes 40a and 40b as in the first modification, and the fifth light shielding portion 42 is provided therebetween. The long hole 40a adjacent to the first circular hole 21a in the second long hole 21b is spaced from the first circular hole 21a by about 36 ° to 96 °, that is, the first circular hole than the first modified example. Only one 21a is formed longer on the first circular hole 21a side.

  Moreover, the 3rd long hole 21c is divided | segmented into two long holes 41a and 41b like the 1st modification, and the 6th light-shielding part 43 is provided among them. The long hole 41a adjacent to the first circular hole 21a in the third long hole 21c is an interval of about 264 ° to 312 ° with respect to the first circular hole 21a, that is, the first circular than the first modified example. Only one hole 21a is formed longer on the first circular hole 21a side.

  Also in this case, the first light shielding portion 21d located between the second long hole 21b of the first light transmitting hole portion 21 and the first circular hole 21a at the reference position is the third long hole located on the diagonal line. It is comprised so that it may correspond to the long hole 41b of 21c. In addition, the second light blocking portion 21e located between the third long hole 21c of the first light transmitting hole portion 21 and the first circular hole 21a at the reference position is the length of the second long hole 21b located on the diagonal line. It is configured to correspond to the hole 40b. Further, the third, fifth, and sixth light-shielding portions 21f, 42, and 43 also have the lengths of the first circular hole 21a, the long hole 41a of the third long hole 21c, and the second long hole 21b located on the diagonal line. It is comprised so that it may each respond | correspond to the hole 40a.

  Even in such a second hand wheel 20, in a state where any one of the first to third, fifth, and sixth light shielding portions 21 d to 21 f, 42, and 43 corresponds to the detection position P of the detection unit 13, When the second hand wheel 20 is rotated by 30 steps (180 °), the first circular hole 21a of the first light transmission hole 21 and the two long holes 40a of the second long hole 21b and the third long hole 21c are always 2 Since one of the two long holes 41a, 41b is configured to correspond to the detection position P of the detection unit 13, in addition to the same effects as the above-described embodiment and the first modification, the following There are also operational effects.

  That is, the first light-shielding portion 21d between the second long hole 21b of the first light transmitting hole portion 21 and the first circular hole 21a at the reference position has an interval of about 36 ° with respect to the first circular hole 21a. That is, when the second hand 20 is rotated by one step (6 °) and the second hand 2 is normally moved by being formed about twice as large as the first circular hole 21a (width of about 24 ° with respect to the circumference). When the second hand wheel 20 is rotated by 4 steps (24 °), the first light-shielding portion 21d passes the detection position P, and a part of the long hole 40a of the first long hole 21b is rotated by the next two steps (sixth second). Can correspond to the detection position P, whereby the rotational position of the second hand wheel 20 can be confirmed in 6 seconds. For this reason, if the needle alignment is less than one hour, it can be confirmed faster than the above-described embodiment whether or not the hand position of the second hand 2 is correct during normal hand movement.

  Further, the second light-shielding portion 21e between the third long hole 21c of the first light transmitting hole portion 21 and the first circular hole 21a at the reference position has an interval of about 48 ° with respect to the first circular hole 21a. That is, the second hand wheel 20 when counting the undetected state of the second light-shielding portion 21e by the detecting portion 13 by being formed about three times as large as the first circular hole 21a (width of about 36 ° with respect to the circumference). The position where the detection unit 13 detects the first circular hole 21a is the reference position (00 second position) of the second hand wheel 20 after the undetected state continues three times by rotating the step by 2 steps (12 °). Thus, the reference position of the second hand 2 can be detected faster than in the above-described embodiment, and the detection speed can be further increased.

  In addition, in the above-described embodiment and the first to third modifications thereof, several minutes before 11 o'clock, which is the specific hour of the next arrival, from the start point at which the number of needle position detection errors has continued three times. In other words, the case where the position detection of the second hand 2, the minute hand 3, and the hour hand 4 by the hand position detection stop means is stopped only for the time until 10:55 has been described. The number of times of position detection error is a predetermined number of times, that is, the time from the start of three consecutive times until the sleep state in which the wristwatch is not used, the second hand 2, the minute hand 3, and the hour hand 4 by the hand position detection stop means You may comprise so that position detection may be stopped. If comprised in this way, the exhaustion of a battery can be prevented significantly similarly to embodiment.

Further, in the above-described embodiment and its modifications, the case where the time for detecting the hand position during normal hand movement is 55 minutes per hour has been described, but it is not necessarily 55 minutes per hour; For example, it may be between 50 minutes and 59 minutes per hour.
Moreover, in the said embodiment and each modification, the shape of each 1st-3rd light transmissive hole part 21, 28, 29 each provided in the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 is circular shape. However, other shapes such as a square, trapezoid, and polygon may be used.

  Further, in the above-described embodiment and each of the modifications thereof, the case where the present invention is applied to a pointer-type wristwatch has been described, but it is not necessarily a wristwatch. Can be applied to watches.

DESCRIPTION OF SYMBOLS 1 Clock module 2 Second hand 3 Minute hand 4 Hour hand 5 Dial 8 Clock movement 9 Solar panel 11 1st drive system 12 2nd drive system 13 Detection part 17 1st stepping motor 20 Second hand wheel 21 1st light transmission hole part 21a 1st circular shape Holes 21b and 21c Second and third long holes 21d to 21f First to third light shielding portions 22 Second stepping motor 23 Intermediate wheel 25 Minute hand wheel 27 Hour hand wheel 28 Second light transmitting hole portion 29 Third light transmitting hole portion 29a 4th light shielding part 30 4th light transmissive hole part 31 Light emitting element 32 Light receiving element 35 CPU
SW push button switch

Claims (6)

A light detection means for detecting transmission and non-transmission of light to each light transmission hole portion of a plurality of pointer wheels each having a pointer attached thereto;
Needle position detection means for detecting the position of the pointer based on the transmission and non-transmission states of light detected by the light detection means;
Light / dark determination means for determining whether or not the outside is in a dark state;
A dark state detecting means for determining whether or not the outside is in a dark state by the light and dark determining means and determining whether or not the dark state has continued for a predetermined time;
When it is determined by the dark state detecting means that the dark state has continued for a predetermined time, at least a specific pointer in the plurality of pointers is moved to a reference position and stopped, and at each predetermined time in the stopped state And a needle movement stop control means for controlling so that the positions of the plurality of hands are detected by the needle position detection means.   The number of times when the position of the plurality of hands could not be detected by the needle position detecting means in a state where the specific hands were stopped at the reference position by the control of the needle movement stop control means. Needle position detection stop control means for stopping the detection of the position of the pointer by the needle position detection means for a predetermined time until the predetermined time is reached when The needle position detecting device according to claim 1.   After the dark state is determined to be dark by the dark state detection means, when the dark state continues for a period longer than the predetermined time, the plurality of hands are moved to the reference position for use. The needle position detection device according to claim 1 or 2, further comprising a long-term needle movement stop control means for stopping for a long period of time before starting. Based on the light detection means for detecting the transmission and non-transmission of light to the light transmission hole portions of the plurality of pointer wheels to which the pointers are respectively attached, and the light transmission and non-transmission states detected by the light detection means In a needle position detection control method used in a needle position detection device comprising needle position detection means for detecting the position of the pointer,
A light / dark determination step for determining whether or not the outside is in a dark state;
A dark state detecting step of determining whether or not the outside is in a dark state by the light and dark determination step, and determining whether or not the dark state has continued for a predetermined time;
When it is determined by the dark state detection step that the dark state has continued for a predetermined time, at least a specific pointer in the plurality of pointers is moved to a reference position and stopped, and at each predetermined time in the stopped state And a needle movement stop control step for controlling the positions of the plurality of hands to be detected by the needle position detecting means.   When the position of the plurality of hands cannot be detected by the needle position detecting means in a state where the specific pointer is stopped at the reference position by the control of the needle movement stop control step, the number of times that the hands cannot be detected. A needle position detection stop control step for stopping the detection of the position of the pointer by the needle position detection means for a predetermined time when the predetermined number of times continues for a predetermined number of times. The needle position detection control method according to claim 4.   After the dark state is determined to be dark by the dark state detection step, when the dark state continues for a period longer than the predetermined time, the plurality of hands are moved to the reference position for use. The needle position detection control method according to claim 4 or 5, further comprising a long-term needle movement stop control step for stopping for a long period of time before starting.

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