JP2002341055A - Structure of timepiece with rotary indication plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the inclination of a rotary indication plate to keep a stable flat surface because the inclination of the rotary indication plate causes lifting in a certain direction to contact another member and to generate a large load. SOLUTION: Plural spherical projections contactable to the circumference of the rotary indication plate are formed on the opposite side to the pressing pressure direction of a spring member provided for the rotary indication plate and pressing the lower part of a rotation center wheel, and disposed around an extension line formed by connecting the rotation center to the pressing pressure direction of the spring member in a 90 deg. range at an interval of 45 deg., so that the inclination of the rotary indication plate is corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a timepiece with a rotating display plate, and more particularly, to a method of measuring a rotation center axis in which a side opposite to a pressing direction when a spring member presses sinks and a disk tilts. The present invention relates to a structure of a timepiece with a rotating display plate for preventing the occurrence of a clock.

[0002]

2. Description of the Related Art It has been well known that a timepiece with a display plate attached to a rotation center shaft of the timepiece and rotating is mainly used for a novelty of movement and fashion. Such a timepiece with a rotating display plate expresses the fun of movement drawn on a display plate that is held on a rotation center axis and rotates by transmission of a wheel train.

FIG. 3 and FIG. 4 are finished appearance surface views of a timepiece with a rotating display plate which is usually used. FIG. 3 is intended to express interest by opening a plurality of circular openings in the dial and observing the movement of the drawing displayed in the openings. FIG. 4 is intended to express the fun of drawing movement in the opening by opening the fan-shaped opening.

More specifically, the rotary display plate 1 shown in FIG. 3 is printed with four-colored color schemes, and a part of the color scheme of the rotary display board 1 can be seen through an opening 17a opened in the dial 17. In this way, a moving image is displayed. As will be described later, the color of the rotary display plate 1 can be seen from the opening 17a of the dial 17 by the usual transmission method of the one-second hand wheel train.

[0005] A rotary display plate 1 shown in FIG.
The days of the week in English, such as NDAY, TUESDAY,..., Are printed, and the dial 17 is provided with a fan-shaped opening 17a through which a part of the rotary display plate 1 can be seen. The rotary display plate 1 is configured to rotate so as to rotate once per day. Thereby, the opening 17a of the dial 17 is enlarged,
It tries to show all characters like SUNDAY.

Next, a conventional mechanism for rotating the rotary display plate 1 shown in FIGS. 3 and 4 will be described. FIG. 5 is a sectional view of a main part showing a configuration for rotating the rotary display plate 1 shown in FIG. In FIG. 5, a conventional timepiece with a rotary display plate has an hour hand and a minute hand for time attached to each hour hand of an hour wheel 18 and a minute hand wheel 19.

The rotary display plate 1 is disposed below the dial 17 and is held and fixed to a rotation center wheel 2 which is rotatably held on a center shaft 2a of a timepiece. The rotation of the rotor 3 is transmitted to the fifth wheel & pinion 4 and transmitted to the driven vehicle 6 via the lower pinion 5 attached below the fifth wheel & pinion 4 and driven by the normal transmission method of the one-second wheel train. By this driving, the movement of the expression of the pattern such as the color change can be seen from the opening 17a of the dial 17 every moment.

When the lower pinion 5 is rotated, the driven wheel 6 moves in the direction of the center axis 2a of the timepiece when the lower pinion 5 rotates due to the application of force because the pivot portion of the fifth wheel & pinion 4 has some backlash. It will rotate while being pressed. First, seat 1
5, when the driven vehicle 6 rotates while being pressed, vibration occurs on the outer periphery of the rotary display plate 1.

FIG. 6 is a sectional view of a main part showing a structure for rotating the rotary display plate 1 shown in FIG. The conventional timepiece with a rotary display plate shown in FIG. 6 has an hour hand, a minute hand and a second hand for time attached to hour hand wheels 18, a minute hand wheel 19 and a second pinion 20. The rotating display plate 1 is disposed below the dial 17 and is held and fixed to the rotating center wheel 2. The hour wheel 18 is rotatably held by the center shaft 2a of the timepiece, and the center wheel 2 is rotatably held by the hour wheel 18.

The rotation transmitted by the normal transmission method of the one-second hand wheel train from the rotor (not shown) is transmitted to the hour wheel 18, and the rotation of the hour wheel 18 is transmitted to the date transmission wheel 8 and transmitted by the date feeding claw (not shown). At the same time as the date is being fed, the center-of-rotation wheel 2
Is rotated, the rotary display board 1 is driven once a day, and the drawing of the day of the week or the like can be seen from the opening 17a of the dial 17.

In FIG. 6, the teeth are pressed in one direction by a spring member 9 so that the center wheel 2 does not normally swing. The spring member 9 eliminates the fluctuation of the rotary display plate 1 in the rotation direction, but until the switching after one day, the lower part of the rotation center wheel 2 is pressed by the spring member 9 to suppress the rotation. The gap occurs between the vehicle 18 and the backlash and the inclination occurs.

[0012]

However, according to the sectional views shown in FIGS. 5 and 6, the rotary display plate 1 is fixed below the rotary center wheel 2 in FIG. When the lower pinion 5 rotates, a force that is pressed against the driven wheel 6 acts, so that the rotary display plate 1 oscillates on the outer periphery, and the direction from 4 o'clock to 7 o'clock of the outer periphery of the rotary display plate 1 (when the lower pinion 5 is pressed). (The direction in which the object moves).

According to FIG. 6, a spring member 9 is disposed below the rotation center wheel 2 to apply a force for pressing the rotation center wheel 2 in one direction. Due to the pressing force of the spring member 9 from the lower direction to the rotation center wheel 2 from the lower direction, the inclination of the rotary display plate 1 on the extension line on the opposite side of the spring member 9 increases, and there is a possibility of contact with other parts. Come.
This tendency has the disadvantage that the larger the diameter of the rotating display plate, the greater the inclination and the area of contact with other components is widened, thereby impairing the smooth rotation of the display plate and imposing a large load.

An object of the present invention is to solve the above-mentioned problems and to provide a structure in which a rotary display plate continues to rotate smoothly and smoothly as a completed timepiece.

[0015]

In order to achieve the above object, the present invention provides a rotating center wheel, a disk held and fixed to the rotating center wheel, and pressing the rotating center wheel from a side surface in a fixed direction. It has a pressing member and a member used for a movement disposed below the disk, and is characterized in that a projection capable of contacting the disk is formed on a side opposite to a pressing direction of the pressing member.

The protrusion is formed on the member, which is a part of the movement, near the outer periphery of the disk, and has a plurality of protrusions that can contact the disk near the outer periphery of the disk. Further, in the vicinity of the outer periphery of the disk, a plurality of protrusions that can contact the disk are arranged at a certain angle depending on the position of the pressing member that presses the rotation center wheel from one side of the side. It is characterized by the following. Further, the pressing member is a spring member.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of the present invention. FIG. 1A is a plan view showing a state where a rotary display plate is removed, FIG. 1B is a plan view of a rotary display plate, and FIG. Shows a side view of the rotating display board. FIG. 2 is a sectional view showing a main part of the present invention. The main cross section of FIG. 1 is substantially equivalent to FIG.

First, the structure will be described in detail with reference to the plan view shown in FIG. 1 and FIG. The same parts and members as those in FIG. 6 are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIGS. 1A and 6, the date transmission wheel 8 reduces the rotation of the hour wheel 18 by half, and the date feeding claw 8 b formed on the date transmission wheel 8 has The date plate 21 is sent once a day by sending the date gear 8a. Reference numeral 13 denotes a holding plate for holding the date plate 21 and the like. The holding plate 13 has three screws 12
It is held and fixed to the main plate by a, 12b and 12c.

FIG. 1B shows a rotary display plate 1. FIG.
(C) shows a configuration in which the rotation center wheel 2 is fixed to the rotation display plate 1. As shown in FIG. 6, the rotation center wheel 2 is rotatably held by a shaft portion of an hour wheel 18 holding an hour hand, and the seat 1
5 defines the position in the axial direction. The rotation center wheel 2 holds the rotation display plate 1 fixedly and is driven once a day by the day feed pin 8c provided on the date transmission wheel 8 described above.

Reference numeral 9 denotes a spring member which is disposed below the rotary display plate 1. As shown in a plan view, a spring member 9 integrally formed with a pressing plate 13 presses against the teeth of the rotation center wheel 2 to press the rotation center wheel 2 from the side to regulate the position of the rotation center wheel 2 in the rotation direction. Also regulates the feed pitch.

Reference numeral 10 denotes a member which is a main component of the present invention, which is located further outside the common member (for example, a spacer) 16 located outside the timepiece movement and below the rotary display plate 1. 10a, 1
Spherical protrusions 0b and 10c are provided, and as shown in FIG. 2, the portion in contact with the rotary display plate 1 is spherical and configured to make point contact. The member 10 has a dial foot hole 14 for determining the position of the timepiece dial 17 shown in FIG. 2, and the rotary display plate 1 is set with a certain gap from the member 10.

The method of assembling will be described. The installation of the hour wheel 18, the date transmission wheel 8, the date plate 21 and the like are the same as in the conventional case. In this state, the rotation center wheel 2 is assembled with the rotation display plate 1 facing the dial so as to engage with the shaft portion of the hour wheel 18. At this time, the spring member 9 formed integrally with the pressing plate 13 so that the day feed pin 8c meshes with the teeth of the rotation center wheel 2
To press against the teeth. Finally, the seat 15 is assembled to prevent the rotation display plate 1 from falling off the movement.

Here, when the teeth of the rotation center wheel 2 are pressed by the spring member 9, the rotation display plate 1 has an outer periphery due to a play or gap between the rotation center axis 2 and the clock center axis 2 a, an inclination around the center, and the like. Causes a phenomenon in which the direction in which the outer periphery of the rotary display plate 1 is pressed is lifted. Then, the lower surface of the outer periphery of the rotary display plate 1 on the opposite side to the pressed direction is
As a result, a frictional force acts to generate a large load.

In order to prevent this, in the present application, three spherical projections are provided on the member 10 as shown in FIGS. That is, as shown in FIG. 1, since the lower part of the rotary center wheel 2 is always pressed in one direction by the spring pressure, the outermost diameter circle of the member 10 that can contact the rotary display plate 1 at a position opposite to the direction in which the spring pressure is applied. A plurality of spherical projections 10a, 10b, and 10c were formed on the circumference. The plurality of arrangements are arranged within a range of about 90 ° with respect to a line connecting the center of the rotation center wheel 2 and the point where the spring member 9 is pressed.

As a result, the tilted rotary display plate 1 can be pushed up to maintain a stable flatness.
The spherical protrusions 10a, 10b and 10c are point-contacted to the rotary display plate 1 by making the upper surface spherical, so that even if the spherical protrusions 10a, 10b and 10c come into contact with the member 10, the load can be reduced. Further spherical projection 1
The rotational load torque can be minimized by mirror finishing the spherical surfaces 0a, b, and c.

The positions of the spherical projections 10a, 10b and 10c are the members
It is necessary to dispose the member 10 and the rotary display plate 1 at an optimum position on the side opposite to the direction in which the spring member 9 is pressed so as to provide a slight gap in cross section. Member 10
Is a member 16 already used as a movement member
It is impossible to change the shape of the member 16 by arranging the member 16 further outside.

As realistic values, the spherical projections 10a,
b and c are 130 μm in processing warpage of the rotary display plate 1 and 30 μm in component tolerance of the member 10 in a space having a cross-sectional gap of 300 μm.
In consideration of this, the amount of overlap that can be brought into contact with the rotary display plate 1 is 30 μm, the height is set to 330 μm, and a gap of 30 μm from the dial 17 is secured. No abnormalities are seen.

[0028]

As described above, according to the present invention, the inclination of the rotary display panel can be corrected by providing the spherical projection, and the rotary display panel can be rotated without applying a large load to the motor. . This effect becomes more effective as the diameter of the disk of the rotary display plate increases. It is effective to arrange the spherical projections at various positions depending on the tilt direction.

[Brief description of the drawings]

FIG. 1 is a movement showing an embodiment of the present invention;
(A) is a plan view showing a state in which the rotating display plate is removed, (B)
Shows a plan view of the rotating display board, and (c) shows a side view of the rotating display board.

FIG. 2 is a cross-sectional view of a main part of the movement showing the embodiment of the present invention.

FIG. 3 is a completed external view of a timepiece with a rotating display plate.

FIG. 4 is a completed external view of a timepiece with a rotating display plate.

FIG. 5 is a sectional view of a main part of a conventional timepiece with a rotating display plate.

FIG. 6 is a sectional view of a main part of a conventional timepiece with a rotating display plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation display board 2 Rotation center wheel 2a Clock center axis 3 Rotor 4 Fifth wheel 5 Lower pinion 6 Follower wheel 8 Date transmission wheel 9 Spring member 10 Member 10a, 10b, 10c Spherical protrusion 12a, 12b, 12c Screw 13 Hold down Board 14 Dial foot hole 15 Seat 17 Dial 17a Opening 18 Hour wheel 19 minute hand wheel 20 seconds Kana 21 Date plate

Claims (5)

[Claims] 1. A rotation center wheel, a disk held and fixed to the rotation center wheel, a pressing member for pressing the rotation center wheel in a fixed direction from a side surface, and a movement disposed below the disk. A structure of a timepiece with a rotating display plate, comprising: a member to be used; and a projection formed on a side opposite to a pressing direction of the pressing member so as to be able to contact the disk. 2. The structure of a timepiece with a rotating display plate according to claim 1, wherein said projection is formed near said outer periphery of said disk and on said member which is a part of a movement. 3. The structure of a timepiece with a rotating display plate according to claim 2, wherein a plurality of projections are provided near the outer periphery of said disk so as to be able to contact said disk. 4. A plurality of projections that can come into contact with the disk near the outer periphery of the disk are arranged at a certain angle depending on the position of the pressing member that presses the rotation center wheel from one side of the side. The structure of the timepiece with a rotating display plate according to claim 3, wherein 5. The structure of a timepiece with a rotating display plate according to claim 1, wherein the pressing member is a spring member.