CN103812405A - Electromotor device, driving unit for the electromotor device, driving method and clock - Google Patents
Electromotor device, driving unit for the electromotor device, driving method and clock Download PDFInfo
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- CN103812405A CN103812405A CN201310552640.9A CN201310552640A CN103812405A CN 103812405 A CN103812405 A CN 103812405A CN 201310552640 A CN201310552640 A CN 201310552640A CN 103812405 A CN103812405 A CN 103812405A
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Abstract
The invention provides an electromotor device, a driving unit for the electromotor device, a driving method and a clock. With the instruction of a manipulating needle, a control circuit (15) provides AC pulse driving circuits (I01, I02) for a driving coil (13) through a drive circuit (14), so that a pulse-shaped AC magnetic field can be formed in a stator (11). A driving torque is generated by the AC magnetic field and a magnet (121) of a rotor (12), and thereby the rotor (12) is rotated. After the manipulating needle is started, the control circuit (15) provides driving circuits (I01, I02) to the driving coil (13) at a rotating speed faster than N min under the situation that the instruction of the stop of manipulating needle in a short time is provided. The driving circuit (I02) is supplied at last and is stopped, and thereby the stopping position of the rotor (12) is stable, and the starting for the next time can be stable.
Description
Technical field
The present invention relates to drive unit and the driving method of a kind of electronic device, motor and use these clock.
Background technology
Clock has by the clock of pointer stepper drive and by the clock of pointer turntable driving.When by pointer turntable driving, use inertia is large, activity scanning motor smoothly.
Its inertia of scanning motor is larger, even if therefore stop applying driving pulse electric current, does not also stop immediately, and rotor continues rotation regular time (with reference to patent documentation 1).
For example, under the state stably driving because of the first driving pulse electric current P1 as shown in Figure 3 and the second driving pulse electric current P2 at scanning motor, if stop applying after applying the second driving pulse electric current P2,, after the amount of the inertia force of rotor based on oneself, stop in release (detent) position.The stable stop position of rotor when herein, so-called release position refers to non-energising (demagnetization).
But, after the startup of handling the needle in indication, the situation about stopping that indication is handled the needle at short notice etc., in the case of the inertia force of rotor does not arrive and stops driving under the state of specific value, stop applying after applying the second driving pulse electric current P2 even if exist, and the situation that rotor does not also stop in release position.
Under these circumstances, apply inceptive impulse electric current (position adjustment pulse current) P0 even if again make rotor, rotor does not also stop in release position, therefore cannot be rapidly and driving pulse synchronously rotate.Being continuously applied in the process of the first driving pulse electric current P1 and the second driving pulse electric current P2, soon, rotor is synchronizeed with driving pulse and is started rotation.
Like this, there are the following problems for scanning motor: the stop position of rotor is fixing, and this will become reason, even and if thereby the indication startup of handling the needle, also cannot synchronize with driving pulse and and promptly start to rotate.For fear of this problem, and carry out using so that the various driving controls that rotor rotates to specific direction.
[background technology document]
[patent documentation]
[patent documentation 1] Japanese patent laid-open 11-289796 communique
Summary of the invention
[inventing problem to be solved]
In electronic clock, generally speaking, for power saving and quiet action, and carry out the control that temporarily stops or opening again handling the needle.
Therefore, there is the situation of the start and stop that indication is handled the needle continuously.In this case, as mentioned above, the possibility that exists rotor to stop in release position.And, in the situation that rotor cannot stop in release position, even if the startup that then indication is handled the needle, rotor also cannot synchronize with driving pulse and promptly rotation, therefore produces the indication opportunity of the startup of handling the needle and the time lag (delay) on beginning opportunity of handling the needle.If this time lag is larger, for example, even if indicate the startup of handling the needle with giving the correct time consistent, the beginning of handling the needle is also slack-off, and therefore the correct moment of clock aims at and becomes difficulty.
In view of described actual conditions, exploitation forms in the present invention, even if being to provide, object handles the needle after startup, what indication was handled the needle at short notice stops, and also can in the time of next startup, make drive unit and the driving method of electronic device, motor that rotor and driving pulse synchronously rotate rapidly and use these clock.
[technological means of dealing with problems]
In order to reach described object, the electronic device of the first viewpoint of the present invention comprises:
Stator;
Rotor;
Coil, is wound on described stator; And
Driving mechanism, the indication of starting by response, supplies with drive current to described coil, makes to produce magnetic field in described stator, makes described rotor produce torque, thereby drives this rotor;
Described driving mechanism responds the indication of described starting, on the opportunity of the indication stopping receiving after the indication regardless of described starting, all with revolution more than predefined revolution, described coil is supplied with to drive current.
For example, the minimum of predefined revolution is supplied with revolution Nmin described in described driving mechanism memory representation,
Described driving mechanism counting is supplied with the revolution N of drive current to described coil, when the indication stopping described in having in the case of in the stage of N < Nmin, at least with Nmin rotating speed, described coil is supplied with to drive current.
For example, described driving mechanism, to described coil, is alternately supplied with the first drive current flowing at first direction and the second drive current flowing in the second direction contrary with described first direction, last, supplying with after described the second drive current, stop the supply of described drive current.
For example, described driving mechanism is in the time of starting, energy is less than to described the first drive current and is supplied to described coil at the mobile position adjustment electric current of described first direction, then, described the second drive current and the first drive current are alternately supplied to described coil.
For example, described position for adjustment electric current, described the first drive current and described the second drive current formed by pulse type electric current.
Described rotor also can possess the inertia rings in order to this rotor is given to inertia.
In order to reach described object, the clock of the second viewpoint of the present invention comprises:
Described electronic device; Second hand; Transmission mechanism, is passed to described second hand by the revolving force of the rotor of described electronic device.
In order to reach described object, the motor drive of the 3rd viewpoint of the present invention, that coil by scanning motor is supplied with drive current and made to produce in stator magnetic field, make rotor produce torque, and drive the motor drive of this rotor, and the indication of response starting, no matter how, all supply with described drive current with revolution more than predefined revolution to described coil the opportunity of the indication stopping.
In order to reach described object, the electric motor drive method of the 4th viewpoint of the present invention, that coil by scanning motor is supplied with drive current and made to produce in stator magnetic field, make rotor produce torque, and drive the electric motor drive method of this rotor, and the indication of response starting, regardless of the opportunity of the indication stopping, all supplies with described drive current with revolution more than predefined revolution to described coil.
[effect of invention]
According to the present invention, handle the needle after startup even if can provide, what indication was handled the needle at short notice stops, and also can in the time that start next time, make drive unit and the driving method of electronic device, motor that rotor and driving pulse synchronously rotate rapidly and use these clock.
Accompanying drawing explanation
Fig. 1 is the figure that represents the scanning motor of execution mode and the formation of its drive circuit.
Fig. 2 (a)～(d) is the figure of the formation of the rotor of the scanning motor of explanation execution mode.
Fig. 3 is the oscillogram that is supplied to the drive current of drive coil.
Fig. 4 is the vertical view that represents scanning motor to be assembled to the state of tumbler.
Fig. 5 is the sectional view that represents scanning motor to be assembled to the state of tumbler.
Fig. 6 is the flow chart of the action of control circuit.
[explanation of symbol]
1 electronic device
11 stators
11a rotor reception hole
11b notch
12 rotors
12c rotating shaft
12d parallel portion
13 drive coils (magnet exciting coil)
14 drive circuits
15 control circuits
15a starting switch
15b shutdown switch
21,22 idler gears
23 second hand wheels
24 minute wheels
25 hour wheels
121 magnet
121d parallel portion
122 inertia rings
122d parallel portion
123 gears
123d parallel portion
400 retaining holes
500 clock display parts
501 second hands
502 minute hands
503 hour hands
600 electronic clocks
I01 the first excitation (driving) electric current
I02 the second excitation (driving) electric current
P0 inceptive impulse electric current (position adjustment pulse current)
P1 the first driving pulse electric current
P2 the second driving pulse electric current
The final pulse current of Pf
Embodiment
Below, the electronic device relevant to embodiments of the present invention, drive unit and driving method, electronic clock are described.
As of background technology illustrated, scanning motor in the past after startup, in situation about stopping at short notice, while restarting, produces the problem of the undesired rotation of rotor sometimes.The result of inventor's checking distinguishes, this is because the quantity of the driving pulse after the startup of handling the needle, drive coil being applied is very few, and the stop position shakiness of rotor is decided to be one of reason.Therefore,, in present embodiment, for making the stop position of rotor stable, control by the mode that applies driving pulse electric current after the startup of handling the needle more than with specified rotation number.
The electronic clock 600 of present embodiment as shown in Figure 1, possesses electronic device 1 and clock display part 500.Electronic device 1 comprises stator 11, rotor 12, drive coil (magnet exciting coil) 13, drive circuit 14 and control circuit 15.In addition, in present embodiment, in Fig. 1, rotor 12 is made as to forward to the situation of the direction rotation of arrow A F, the situation of the direction rotation to arrow A B is made as to reverse.
More specifically, as shown in Fig. 2 (a)～(c), rotor 12 is configured coaxially and is formed by magnet 121, inertia rings 122 and gear 123.Rotor 12 can integrally rotatably configure centered by rotating shaft 12c.Magnet 121 is formed as discoid, and 2 utmost points are by magnetic.Inertia rings 122 has fixing weight, and with so that the smooth rotation of rotor 12.Thus, electronic device 1 is brought into play function as scanning motor.Gear 123 through geared system as shown in Figure 4, and is passed to second hand 501, minute hand 502 and the hour hands 503 in the clock display part 500 shown in Fig. 1 by the rotation of rotor 12.
As shown in Figure 1, drive coil (magnet exciting coil) 13 is wound on stator 11, and according to the first excitation (driving) electric current I 01 of alternately supplying with and the second excitation (driving) electric current I 02 in the opposite direction flowing, and produce AC magnetic field.
Drive circuit 14 is connected to one end and the other end of drive coil 13, and according to the control of control circuit 15, as Fig. 3 (a) and (b), by the first exciting current I01 and with the first exciting current I01 rightabout flow the second exciting current I02 alternately flow to drive coil 13.
The first exciting current I01 comprises inceptive impulse electric current (the position adjustment pulse current) P0 applying at first and the first driving pulse electric current P1 then applying with the fixed cycle.Inceptive impulse electric current P0 has the narrower pulse duration than the first driving pulse electric current P1, even if drive coil 13 is applied, it also cannot produce separately the torque that enough makes rotor 12 rotate completely, but can produce, rotor 12 is reversed,, make it the torque of moving to the large position of position energy a little.On the other hand, the first driving pulse electric current P1 can produce the torque that makes separately rotor 12 rotate.The second driving pulse electric current P2 has current value and the pulse duration identical with the first driving pulse electric current P1, and with 180 ° of the first driving pulse electric current P1 phase deviations.
In simulation Pulse Electric fluxion Nmin, to test and obtain the electronic clock 600 of practice assembling motor device 1 under various conditions by utilization, stop at the driving pulse electric current number applying till applying stop in release position in the situation that stops at rotor 12, set its value.As condition, for example, there is load (weight of pointer, pointer towards, support the balance of structure etc.), the driving voltage etc. of posture (collection and prostrate), second hand axle.Simulation Pulse Electric fluxion Nmin it is desirable to less value, but also can consider fixing safety coefficient and set.In addition, also can obtain by logical calculated etc.
In addition, control circuit 15 handle the needle stop time, finally control drive circuit 14, so that the second driving pulse electric current P2 flows to drive coil 13.
Utilize these effects, rotor 12 stably stops at desired position at every turn.
The electronic device 1 with described formation is assembled to the illustrated tumbler of Fig. 4.As shown in FIG. 4 and 5, gear 123 and idler gear 21 interlocks of rotor 12, the rotation of rotor 12 is passed to second hand wheel 23 via idler gear 21,22, drive the second hand 501 in the clock display part 500 shown in Fig. 1.And then the rotation of second hand wheel 23 is passed to minute wheel 24, drive minute hand 502, the rotation of minute wheel 24 is passed to hour wheel 25, drives hour hands 503.
But, form parallel portion 12d and 123d at the rotating shaft 12c of rotor 12, and forming respectively slotted eye at magnet 121 and inertia rings 122.In the time that magnet 121 is fixed on to rotating shaft 12c, determine the position of magnet 121 with respect to the direction of rotation of rotating shaft 12c by the parallel portion 121d butt of the parallel portion 12d of rotating shaft 12c and the slotted eye of magnet 121.In addition, inertia rings 122 laminations during at rotating shaft 12c, as shown in Figure 2 (d) shows, by by the parallel portion 122d butt of the slotted eye of parallel portion 123d and inertia rings 122, are being determined to the position of inertia rings 122 with respect to the direction of rotation of rotating shaft 12c.Therefore, rotating shaft 12c, magnet 121 and inertia rings 122, when by lamination, are orientated fixing position relationship as in direction of rotation.
In inertia rings 122, forming retaining hole 400.In the time that rotor 12 is assembled to tumbler, inertia rings 122 is used this retaining hole 400, locates and assembles to become the mode of the position shown in Fig. 4.In addition, this position is the release position of the rotor 12 shown in Fig. 1.
In the present embodiment, rotor 12 after being assembled to tumbler by magnetic.Be not release position by the rotor 12 of magnetic in the position of oneself, want to the rotation of release position, but now, exist to the situation of forward direction rotation and the situation of rotating to reverse direction.In the present embodiment, be not described in detail, but continue to reverse direction in the situation of rotation when rotor 12, due to the relation of profile of tooth, the gear 123 that has a rotor 12 stops up with idler gear 21 and causes the situation that action is bad.
In present embodiment, by advance by rotor 12 under the state that is positioned at the release position shown in Fig. 1 magnetic, prevent that rotor 12 from rotating to reverse direction.
Secondly, the action that there is the electronic device 1 of described formation and assembled its electronic clock 600 with reference to the flowchart text of Fig. 6.
If the starting switch 15a of control circuit 15 is operated, control circuit 15 starts the processing of handling the needle shown in Fig. 6.First control circuit 15 as shown in Fig. 3 (a), controls drive circuit 14, so that the inceptive impulse electric current of the first exciting current I01 (position adjustment pulse current) P0 is supplied to drive coil 13(step S1).By this control, and the self-driven circuit 14 of inceptive impulse electric current P0 of little energy flows to drive coil 13 to positive direction, the magnetic field of the interior generation positive direction of stator 11.The magnetic field having produced is applied to the magnet 121 of rotor 12, and rotor 12 rotates to reverse direction in complete non-rotary scope.
In addition, control circuit 15 is counted N and is initialized as 0(step S1 being stored in the driving pulse electric current of having supplied with in internal storage).
Then, control circuit 15 stops the supply of inceptive impulse electric current P0, and as shown in Figure 3 (b), controls drive circuit 14, so that the second driving pulse electric current P2 of the second exciting current I02 is supplied to drive coil 13(step S2).By this control, the self-driven circuit 14 of the second driving pulse electric current P2 flows round about to drive coil 13, the rightabout magnetic field of the interior generation of stator 11, and be applied to the magnet 121 of rotor 12, produce driving torque., in the rotor 12 of reverse direction rotation, apply and wanted to return to release position and to the power of forward direction rotation by inceptive impulse electric current P0.In the time of this state, by applying the second driving pulse electric current P2 in order to drive to forward direction, can make rotor 12 from positively forward of inactive state.
This rotation is passed to second hand wheel 23 from gear 123 via idler gear 21,22, and second hand 501 also rotates.But due to the inertia of inertia rings 122 grades, the activity of second hand 501 is smooth and easy.
In addition, control circuit 15 is counted N by memory at the driving pulse electric current of having supplied with of internal storage and is added 1(step S2).
Then, control circuit 15 judgement handle the needle whether continue in (whether indicate and stop) (step S3), (step S3 in continuing if; Be), control drive circuit 14, so that the first driving pulse electric current P1 of the first exciting current I01 is supplied to drive coil 13(step S4).By this control, the self-driven circuit 14 of the first driving pulse electric current P1 of positive direction flows to drive coil 13.Thus, the magnetic field of the interior generation positive direction of stator 11, is applied to the magnet 121 of rotor 12, produces driving torque.Thus, rotor 12 continues rotation, and pointer also rotates with the rotation interlock of rotor 12.In addition, control circuit 15 is counted N by memory at the driving pulse electric current of having supplied with of internal storage and is added 1(step S4).
Then, control circuit 15 judgement handle the needle whether continue in (whether indicate and stop) (step S5), (step S5 in continuing if; Be), be back to step S2, repeat same action.
On the other hand, in step S5, indicate (step S5 stopping of handling the needle in the case of being judged as; No), control circuit 15 is controlled drive circuit 14, so that the second driving pulse electric current P2 is supplied to drive coil 13(step S6).Thus, rotor 12 continues rotation, and pointer also continues rotation.In addition, control circuit 15 is counted N by memory at the driving pulse electric current of having supplied with of internal storage and is added 1(step S6).
And then, after supplying with the second driving pulse electric current P2 in step S6, and in step S3, be judged as (step S3 in the indication situation about stopping of handling the needle; No), control circuit 15 judges whether the total N of the driving pulse electric current P1, the P2 that have supplied with is the simulation Pulse Electric fluxion Nmin above (step S7) of memory internal storage.
Be less than (step S7 simulation Pulse Electric fluxion Nmin in the case of being judged as the total N of the driving pulse electric current P1, the P2 that have supplied with; No), repeat the output of driving pulse electric current P1, P2, be simulation Pulse Electric fluxion Nmin above (step S8, S9) until be judged as the total N of the driving pulse electric current P1, the P2 that have supplied with.
Finally, be above (the step S7 of simulation Pulse Electric fluxion Nmin if be judged as the total N of the driving pulse electric current P1, the P2 that have supplied with; Be), control circuit 15 finishes to handle the needle processing.
According to such method of handling the needle, utilize the processing of handling the needle for 1 time, drive coil 13 is supplied with at least driving pulse electric current P1, the P2 of Nmin, therefore rotor 12 has the inertia force in design and rotates.Thus, apply after specific driving pulse electric current finishes to rotor 12, necessarily rotate specific revolution after rotor 12 stop.In present embodiment, the final pulse current Pf finally supplying with afterwards in the indication stopping of handling the needle as shown in Figure 3 (b), is the second driving pulse electric current P2.Thus, rotor 12 only rotates 1 after end applying of the second driving pulse electric current P2 and one fixes on the release position shown in Fig. 1 and stop after turning.This is the initial position that drives the rotor 12 while end.Therefore, be difficult to be created in while startup next time the unfavorable condition that rotor 12 is not promptly synchronizeed with driving pulse.Thus, be applied at least driving magnetic field of Nmin in rotor 12, rotor 12 stops after rotating at least (Nmin+1)/2.
Like this, in present embodiment, even if indicate stopping of handling the needle, the supply of driving pulse electric current does not also stop immediately, and at least driving pulse electric current P1, the P2 of Nmin are supplied to drive coil 13.Thus, rotor 12 rotates only specific revolution under the state with specific inertia force, stops in release position.Therefore, in the case of indicating next time the startup of handling the needle, rotation can be synchronizeed rapidly and start to rotor 12 with driving pulse.
In addition, in described execution mode, represented configuration starting switch 15a and shutdown switch 15b, the beginning that utilizes switching manipulation to indicate to handle the needle and the example stopping, but also can utilize other arbitrarily signal indicate the beginning of handling the needle and stop.For example, also configurable illuminance transducer, attitude sensor etc., judge the status of using of electronic clock 600 according to the output of these transducers, the beginning that indication is handled the needle with stop.
In addition, rotor 12 exemplified with 2 the utmost points by the motor of magnetic, but also can be 4 extremely more than.
In described execution mode, represent the example of supply inceptive impulse electric current (position adjustment pulse current) P0, but also can it be set.
Inertia rings 122 also can be other shape, in addition, also can not arrange.
Described hardware forms or flow chart is an example, can at random change and revise.
In addition, also can distribute, supply with to bring into play the processor of function as control circuit the computer program of carrying out described processing via recording medium etc., and carry out it.
The present invention, in the spirit and scope that do not depart from broad sense of the present invention, can implement various execution modes and distortion.In addition, described execution mode be illustrate of the present invention, and and non-limiting scope of the present invention., scope of the present invention is represented by claim, rather than is represented by execution mode.And the various distortion of implementing in claim and in the scope of the meaning of the invention equal with it are considered as in scope of the present invention.
Claims (9)
1. an electronic device (1), is characterized in that comprising:
Stator (11);
Rotor (12);
Coil (13), is wound on described stator (11); And
Driving mechanism (14,15), the indication of starting by response, supplies with drive current (I01, I02) to described coil (13), makes to produce magnetic field in described stator (11), makes described rotor (12) produce torque, and drives this rotor (12);
Described driving mechanism (14,15) responds the indication of described starting, on the opportunity of the indication stopping receiving after the indication regardless of described starting, all with revolution more than predefined revolution, described coil is supplied with to drive current.
2. electronic device according to claim 1 (1), is characterized in that:
Described in described driving mechanism (14,15) memory representation, the minimum of predefined revolution is supplied with revolution Nmin,
Described driving mechanism (14,15) counting is supplied with the revolution N of drive current to described coil (13), when the indication stopping described in having in the case of in the stage of N < Nmin, at least with Nmin revolution, described coil (13) is supplied with to drive current.
3. electronic device according to claim 1 (1), is characterized in that:
Described driving mechanism (14,15) is to described coil (13), alternately supply with the first drive current (I01) flowing at first direction and the second drive current (I02) flowing in the second direction contrary with described first direction, finally, supplying with after described the second drive current (I02), stop the supply of described drive current (I01, I02).
4. electronic device according to claim 3 (1), is characterized in that:
Described driving mechanism (14,15) is in the time of starting, energy is less than to described the first drive current (I01) and in the mobile position of described first direction for adjustment electric current (I01) be supplied to described coil (13), then, described the second drive current (I02) and the first drive current (I01) are alternately supplied to described coil (13).
5. electronic device according to claim 4 (1), is characterized in that:
Described position for adjustment electric current (I01), described the first drive current (I01) and described the second drive current (I02) formed by pulse type electric current (P0, P1, P2).
6. electronic device according to claim 1 (1), is characterized in that:
Described rotor (12) possesses the inertia rings (122) in order to this rotor (12) is given to inertia.
7. a clock (600), is characterized in that comprising:
Electronic device according to claim 1 (1);
Second hand (501); And
Transmission mechanism (123), is passed to described second hand (501) by the revolving force of the rotor of described electronic device (1) (12).
8. a motor drive (14,15), supply with drive current (I01, I02) by the coil to scanning motor (13) and make generation magnetic field in stator (11), make rotor (12) produce torque, thereby drive this rotor (12), and described motor drive (14,15) is characterised in that:
The indication of response starting, no matter how, all supply with described drive current (I01, I02) with revolution more than predefined revolution to described coil (13) opportunity of the indication stopping.
9. an electric motor drive method, supply with drive current (I01, I02) by the coil to scanning motor (13) and make generation magnetic field in stator (11), makes rotor (12) produce torque, and drive this rotor (12), and described electric motor drive method is characterised in that:
The indication of response starting, regardless of the opportunity of the indication stopping, all supplies with described drive current (I01, I02) with revolution more than predefined revolution to described coil (13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-247902 | 2012-11-09 | ||
| JP2012247902A JP2014095641A (en) | 2012-11-09 | 2012-11-09 | Motor device, driving device for motor, and clock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103812405A true CN103812405A (en) | 2014-05-21 |
Family
ID=50708716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310552640.9A Pending CN103812405A (en) | 2012-11-09 | 2013-11-08 | Electromotor device, driving unit for the electromotor device, driving method and clock |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014095641A (en) |
| CN (1) | CN103812405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112385135A (en) * | 2018-07-02 | 2021-02-19 | 西铁城时计株式会社 | Stepping motor driving device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7032012B1 (en) * | 2021-10-13 | 2022-03-08 | 則雄 宮内 | Analog electronic clock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54140914A (en) * | 1978-04-26 | 1979-11-01 | Citizen Watch Co Ltd | Construction of motor for quartz timepiece having hands |
| US4550279A (en) * | 1982-09-10 | 1985-10-29 | Fabriques D'horlogerie De Fontainemelon S.A. | Step-by-step motor unit |
| JPH11289796A (en) * | 1998-03-31 | 1999-10-19 | Seiko Clock Inc | Sweep motor for clock |
| CN102005997A (en) * | 2010-10-27 | 2011-04-06 | 北京和利康源医疗科技有限公司 | Device and method for driving and controlling stepper motor |
| CN102142804A (en) * | 2010-02-03 | 2011-08-03 | 精工电子有限公司 | Stepping motor control circuit and analogue electronic watch |
-
2012
- 2012-11-09 JP JP2012247902A patent/JP2014095641A/en active Pending
-
2013
- 2013-11-08 CN CN201310552640.9A patent/CN103812405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54140914A (en) * | 1978-04-26 | 1979-11-01 | Citizen Watch Co Ltd | Construction of motor for quartz timepiece having hands |
| US4550279A (en) * | 1982-09-10 | 1985-10-29 | Fabriques D'horlogerie De Fontainemelon S.A. | Step-by-step motor unit |
| JPH11289796A (en) * | 1998-03-31 | 1999-10-19 | Seiko Clock Inc | Sweep motor for clock |
| CN102142804A (en) * | 2010-02-03 | 2011-08-03 | 精工电子有限公司 | Stepping motor control circuit and analogue electronic watch |
| CN102005997A (en) * | 2010-10-27 | 2011-04-06 | 北京和利康源医疗科技有限公司 | Device and method for driving and controlling stepper motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112385135A (en) * | 2018-07-02 | 2021-02-19 | 西铁城时计株式会社 | Stepping motor driving device |
| CN112385135B (en) * | 2018-07-02 | 2023-12-05 | 西铁城时计株式会社 | Stepping motor driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014095641A (en) | 2014-05-22 |
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Application publication date: 20140521 |