JPH11160463A - Electronically controlled mechanical timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronically controlled mechanical timepiece which can be handled easily, can be improved in yield, can raise level of electromotive voltage and can detect number of revolutions with ease. SOLUTION: A generator 30 of an electronically controlled mechanical timepiece is constituted of a rotor 12 which rotates in liaison with the rotation of a train wheel, two platy stators 31 and 32, a pair of semicircular stator holes 35 and 36 which are respectively formed at one ends of the stators 31 and 32 and circularly arranged around the rotor 12 when the stators 31 and 32 are combined together, and at least one coil 33 and 34 which is wound around at least one stator 31 and 32. Since the stator hole 35 is constituted of the stators 31 and 32, the timepiece can be handled easily without requiring the outside notch which is required for an integral stator and, at the same time, the electromotive voltage of the timepiece can also be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention operates a mechanical energy when a spring is opened as a driving source, partially converts the energy into electric energy, and operates a rotation control means with the electric power to control a rotation cycle. The present invention relates to an electronically controlled mechanical timepiece, and more particularly to an improvement in a generator used for controlling mechanical power while converting mechanical energy into electric energy.

[0002]

2. Description of the Related Art The driving principle of an electronically controlled mechanical timepiece is to drive a wheel train using a mainspring as an energy source. Use a generator that generates The generator generates power by receiving rotation from the wheel train, drives an electronic circuit for control with the generated power, and controls the rotation cycle of the generator by a control signal from the electronic circuit, Control the speed by braking the train. Therefore, this structure does not require a battery as a drive source of an electronic circuit, and can obtain high accuracy equivalent to that of a battery-driven electronic timepiece.

As a prior art of this kind of hybrid timepiece, there is a technique disclosed in Japanese Patent Application Laid-Open No. Hei 8-5758 previously developed by the present applicant. FIG. 16 is a plan view of a timepiece disclosed in the publication, and FIG. 17 is an exploded perspective view of a generator used in the timepiece.

[0004] The electronically controlled mechanical timepiece has a barrel wheel 1 comprising a mainspring, barrel gear, barrel barrel and barrel lid.
The mainspring is fixed to the barrel gear at the outer end and to the barrel barrel at the inner end. The barrel barrel is supported by a main plate and a train wheel bridge, and is fixed by a square hole screw 5 so as to rotate integrally with the square wheel 4.
The square wheel 4 is meshed with the hammer 6 so as to rotate clockwise but not counterclockwise.

The rotational power from the barrel wheel 1 with the built-in mainspring is increased through a wheel train composed of a second wheel 7, a third wheel 8, a fourth wheel 9, a fifth wheel 10, and a sixth wheel 11. To the generator 20.

The generator 20 has a structure similar to a conventional step motor for driving a battery-powered electronic timepiece, and includes a rotor 12, a stator 15, and a coil block 16.

[0007] The rotor 12 has a rotor magnet 12b and a rotor magnet 12b around an axis of a rotor pinion 12a rotating in connection with the sixth wheel & pinion 11.
The rotor inertial disk 12c is integrally mounted.

[0008] The stator coil 1
5a is wound. The stator 15 has a stator hole 15b at its tip end for rotatably accommodating the rotor magnet 12b, and a pair of outer notches 15c recessed toward the hole 15b at 180 ° intervals around the outside of the stator hole 15b. The rear end side is fixed to a base plate (not shown) by screws 21.

The coil block 16 is formed by winding a coil 16b around a magnetic core 16a.
5 and are fixed together to the base plate by being fastened together by a pair of screws 21 and integrated with each other.

The constituent materials of the stator 15 and the magnetic core 16a are PC permalloy.
a and the coil 16b are connected in series so as to be an output voltage obtained by adding the respective generated voltages.

The generator 20 supplies the electric power obtained by the rotation of the rotor 12 to an electronic circuit provided with a crystal oscillator via a capacitor (not shown). , A control signal for the rotation of the rotor is sent to the coil, and as a result, the wheel train always rotates at a constant rotation speed according to the braking force.

[0012]

However, the generator 20 having the above-described structure has the following structural and electromagnetic characteristics problems.

The generator 20 follows the structure of a conventional step motor, and makes it advantageous to generate electricity while avoiding connection with other parts such as a train wheel. That is, the number of turns of the coil is reduced as much as possible. A coil block 16 is added to increase the number.

For this reason, the position where the stator hole 15b is formed is a cantilever-supporting structure as shown in the figure. Electromagnetically, although there is no problem with the step motor,
Difficulties have arisen in the characteristics as a generator.

First, the stator hole 15b is
The magnetic flux passes through the outer notch 15c because it is integrally formed by stamping or the like. And the rotor 12
When the magnet 12b passes through the outer notch 15c, the magnetic flux of the outer notch 15c changes, but the magnetic flux on the coil side hardly changes, so that the electromotive voltage drops at the passing position.

As a countermeasure for this, in manufacturing, the width of the outer notch 15c is made sufficiently small to reduce the drop amount.

However, in such a case, during the processing or during the subsequent processing such as winding and annealing after the processing,
The stator hole 15b is easily deformed by a slight external force, and the permeance changes due to the diameter fluctuation or deformation, the cogging torque increases, and the efficiency as a generator decreases.

The simplest method for detecting the number of revolutions of the rotor is to detect the generated power waveform and binarize it. However, in practice, as described above, since the electromotive voltage drops at the notch passing position, the waveform becomes a complex mountain-shaped waveform shown in FIG.
Detection was difficult.

Further, the finished product is finally mounted on the main plate by screwing in combination with the coil block 16, but since the coil is heavy, even if a very small force is applied, the stator notch 15c beyond the outer notch 15c is applied. The distal end of the 15 is easily bent or deformed, and its handling requires great care.

Of course, in the inspection process, those deformed are disposed of as defective products.
A decrease in yield in each step was not avoided.

An object of the present invention is to solve the handling problem by dividing the stator hole into two parts, improve the yield, and at the same time, increase the electromotive voltage, and make the power generation waveform a sine wave to reduce the number of rotations. An object of the present invention is to provide an electronically controlled mechanical timepiece capable of easily performing detection.

[0022]

An electronically controlled mechanical timepiece of the present invention drives a wheel train using a mainspring as an energy source, and generates electric power in a rotating generator in response to rotation from the wheel train. In an electronically controlled mechanical timepiece that controls the speed of the wheel train by controlling the rotation cycle of the generator by an electronic circuit driven by electric power, the generator controls the rotation of the wheel train. And a pair of semi-circular stators formed at one end of both stators and arranged in a circle around the rotor in a state where both stators are combined. And a coil wound around the outer periphery of at least one of the stators.

Therefore, since the stator hole is of the two-part type, it is possible to prevent the difficulty of handling due to the provision of the outer notch, which is a drawback of the conventional integral stator hole, and to reduce the yield. In addition, since the electromotive voltage becomes high and the voltage waveform becomes a sine wave, rotation detection becomes easy.

At this time, if coils are wound around the outer periphery of both stators and the coils are connected in series, the number of windings can be increased and the electromotive voltage can be increased, which is advantageous as a generator.

The coil wound around the outer periphery of the stator may be used for both generating an electromotive force and controlling rotation. In this case, the number of wires connected to the coil can be reduced.

Further, at least two coils are wound around the outer periphery of the stator, at least one of these coils is used for rotation control, and at least one of the other coils is used for the rotation control. It may be used for generating an electromotive force for supplying power to an electronic circuit.

When a plurality of coils are provided, the functions of each coil are completely divided into those for rotation control and those for generating electromotive force, so that the electromotive voltage does not decrease due to the application of the electromagnetic brake. The voltage is stabilized, and disturbance of the output waveform can be suppressed.

At this time, it is preferable that at least one of the coils used for generating the electromotive force also serves to detect the rotation of the rotor. Also in this case, since the disturbance of the voltage waveform can be eliminated, the rotation period of the rotor can be easily detected, and the detection method is simplified.

A positioning member is provided at the end of the stator on the side of the stator hole, and a positioning jig for pressing each of the stators toward the positioning member to bring the stator into contact with the positioning member is provided. Preferably, it is provided. When forming a pair of stator holes with two stators, the gap between the two stators and the rotor magnet must be set uniformly. When this gap varies,
The rotor is strongly pulled by one of the stators, and the cogging torque increases, or the number of magnetic fluxes flowing through the coil changes, so that the amount of power generation and the torque for rotating the generator are not stable. At this time, if the position of the stator is set while measuring the gap between the stator and the rotor magnet, the assembling workability is reduced. On the other hand, by providing the positioning jig as described above, it is possible to accurately and easily position each stator in a state where the rotor is arranged between the stators.

It is preferable that the positioning jig has a slope which is obliquely pressed against the edge of the stator, and that the slope enables positioning of the stator in the height direction. In this case, not only the positioning work of the stator in the radial direction but also the positioning work in the sectional direction can be easily performed by the positioning jig.

Each stator may have a symmetrical shape. In this case, the left and right parts (stator) can be shared,
Cost can be reduced.

At this time, it is preferable that the number of turns of the coils wound on both stators is the same. With this configuration, the magnetic flux due to AC noise or the like generated outside the timepiece can flow between the two coils in the same number, thereby eliminating the influence of external noise and improving the detection performance.

It is preferable that an inner notch for adjusting the cogging torque, which protrudes outward, is formed at at least one of the opposed positions on the inner periphery of each stator hole. If the inner notch is formed, the cogging torque when the magnetic pole of the rotor passes this position can be reduced, and the rotation of the rotor can be made smooth.

Further, each of the stators has a yoke in which the side surfaces of the other end opposite to the one end in which the stator hole is formed are in contact with each other, and the lower surface of the other end is disposed across each stator. Is preferably abutted.

Thus, two magnetic conduction paths are formed: a path passing through a contact portion between the side surfaces of the stator and a path leading from the lower surface of the stator to the lower surface of another stator via the yoke. The magnetic flux flows more easily in the side direction of the stator, but if the magnetic conduction path is formed only at the contact portion between the side surfaces, the magnetic resistance varies due to the variation in the gap between the side surfaces. Therefore, by arranging the yoke on the lower surface of the stator and providing another magnetic conduction path, the magnetic resistance can be stabilized.

It is preferable that each wheel of the wheel train is provided on a different axis so as not to overlap with the coil. Arranging each of the shift wheels constituting the wheel train on different axes increases the degree of freedom in the layout design of the shift wheels. For this reason, it is possible to arrange the center wheel so as not to overlap with the coil by arranging each center wheel so as to detour to the rotor. Accordingly, since the number of windings can be increased by increasing the diameter of the coil, the axial length of the coil, that is, the magnetic path length can be shortened, and iron loss can be reduced to extend the duration of the mainspring.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of the present invention. In each of the drawings, since the configuration of the generator is the same as the conventional one except that the main part is different from the conventional one, the same or corresponding parts are denoted by the same reference numerals, and different parts,
Alternatively, a description will be given by assigning different reference numerals only to portions to which new description is added.

Referring to the figure, the timepiece of the present invention has a power generator 30 according to the present invention in which the rotational power from a barrel car 1 having a built-in mainspring is increased through a wheel train, in substantially the same manner as in the prior art.
Connected to.

The rotation of the gear wheel of the barrel wheel 1 is increased by a factor of 7 to the second wheel 7 and is sequentially increased by 6.4 times to the third wheel 8
To the fourth wheel 9 after being multiplied by 9.375 times, to the fifth wheel 10 after being tripled to the fifth wheel 10 and to the sixth wheel 11 after being multiplied by 10 times to the rotor 12 of the generator 30 of the present invention. And a total of 1
The speed is increased by 26,000 times to transmit the power.

As shown in FIG. 2, the center wheel 7a is fixed to the center pin 7a, the center pin 13 is fixed to the center pin 7a, and the second hand 14 is fixed to the center wheel 9 as shown in FIG. Therefore, the second wheel 7 is set to 1
In order to rotate the fourth wheel 9 at 1 rpm at rph,
The rotor 12 may be controlled to rotate at 5 rps. In FIG. 2, reference numeral 2 denotes a main plate, and reference numeral 3 denotes a train wheel receiver.

The rotor 12 of the generator 30 is the same as the conventional one. On the other hand, the stator has the same
As shown in detail in FIGS. 1 and 3, each of the upper and lower stators is composed of a combination of a wide stator 31 corresponding to the magnetic core of the coil block and a narrow stator 32. Around the coil 33 and the coil 34
And the coils 33 and 34 are connected in series.

The tip portions 31a, 3 of the stators 31, 32,
2a, a semicircular stator hole 3
5 and 36 are formed facing each other, and rotatably house the rotor magnet 12b. In addition, insertion holes 3 for screws 21 for individually fixing to the base plate 2 are respectively provided at the tip portions 31a and 32a.
1c and 32c are formed.

Further, the rear ends 31 of the stators 31 and 32
In order to connect the stators 31 and 32 to each other to form a magnetic path, b and 32b are formed in an overlapping shape, and a common screw 21 is inserted into the overlapped center to fasten the base plate 2 together. Are opened through the insertion holes (screw holes) 31c and 32c.

Therefore, in the assembled state of the stators 31 and 32, the stator holes 35 and 36 are arranged so as to surround the outer periphery of the rotor magnet 12b while being separated from each other with a predetermined gap g provided at the center thereof. You.

The coils 33 and 34 connected in series are:
As shown in FIG. 4, it is also used for generating an electromotive force, detecting the rotation of the rotor 12, and controlling the rotation of the generator 30.
That is, the electronic circuit 240 composed of an IC is
It is driven by an electromotive force of 34 to perform rotation detection and rotation control. The electronic circuit 240 includes an oscillating circuit 242 for driving the crystal oscillator 241, a frequency dividing circuit 243 for generating a reference frequency signal serving as a time signal based on a clock signal generated in the oscillating circuit 242, and a rotation of the rotor 12. A detection circuit 244 for detecting, a comparison circuit 245 for comparing the rotation cycle obtained by the detection circuit 244 with the reference frequency signal and outputting the difference, and a control signal for braking to the generator 30 according to the difference; And a control circuit 246 for sending the data.
Note that a clock signal may be generated using various reference standard oscillation sources or the like instead of the crystal oscillator 241.

The circuits 242 to 246 are driven by electric power generated by the coils 33 and 34 connected in series, and rotate in one direction when the rotor 12 of the generator 30 receives rotation from the train wheel. Then, an AC output is generated in each of the coils 33 and 34, and this output is boosted and rectified by a boosting charging circuit including a diode 247 and a capacitor 248, and the rectified DC current drives a control circuit (electronic circuit) 240.

A part of the AC output of each of the coils 33 and 34 is extracted as a detection signal of the rotation cycle of the rotor 12 and is input to the detection circuit 244. Each coil 33,
The output waveform output from 34 draws an accurate sine wave every one rotation cycle. Therefore, the detection circuit 244 outputs this signal to A
/ D conversion into a time-series pulse signal, the detection signal is compared with a reference frequency signal by a comparison circuit 245, and a control signal corresponding to the difference is output to each coil 3 by a control circuit 246.
Short circuit 2 functioning as a brake circuit for 3, 34
Send to 49.

Then, based on the control signal from the control circuit 246, the short circuit 249 short-circuits both ends of each of the coils 33 and 34, applies a short brake, and regulates the rotation period of the rotor 12.

As shown in FIG. 5, the short circuit 249 includes a pair of diodes 251 that pass currents in opposite directions, a switch SW connected in series to each of the diodes 251, and a switch SW. It is configured by a bidirectional switch including a parasitic diode 250 connected in parallel. Thereby, each coil 33, 34
The brake control can be performed by using the full wave of the AC output of the motor, so that the brake amount can be increased.

FIG. 18 (a) shows the power generation characteristics of the generator 30 having the above-described configuration, using the same conditions as those of the conventional generator shown in FIGS.
This shows the result of measurement by connecting the output end of the coil to an oscillograph.

According to this embodiment, the following effects can be obtained.

1) Since two stators 31 and 32 are used, as is clear from the characteristic diagram of FIG.
The electromotive voltage can be improved as compared with the case where a conventional outer notch is provided, and the output waveform can be made a correct sine wave for each cycle as compared with the conventional case (see FIG. 3B).

Therefore, the power generation capacity of the generator can be improved,
When obtaining the same electromotive voltage as in the past, the generator can be downsized. Further, since the output waveform is a sine wave, the output waveform can be easily detected by binarizing the output signal by dividing it by an appropriate threshold value, and the rotation speed of the rotor 12 can be easily detected. Therefore, it is possible to accurately and easily control the timepiece using the output waveform of the generator.

2) Since the stators 31 and 32 have no fragile portions due to the cantilever support of the stator holes or portions that are easily deformed such as outer notches due to their structure, they are easy to handle.
The handleability in each step can be improved, and a decrease in yield can be prevented.

3) In each of the stators 31 and 32, the vicinity of the stator holes 35 and 36 is fixed by the screw 21, so that the positional accuracy of the stator holes 35 and 36 with respect to the rotor 12 can be improved.

4) Rear end portions 3 of the two stators 31 and 32
Since 1b and 32b are directly connected by the screw 21, an annular loop through which the magnetic flux flows only by the two stators 31 and 32 can be formed, the number of contacts can be reduced, the magnetic flux can easily flow, and the number of parts increases. Can also be suppressed.

5) Since the short circuit 249 connected to each of the coils 33 and 34 is constituted by a two-way switch, the full-wave can be used, the braking amount can be increased, and the brake control can be effectively performed.

FIGS. 6 and 7 show a second embodiment of the present invention. In the figure, a generator 40 is formed by winding a coil 42 having the same number of turns on the outer periphery of a pair of U-shaped stators 41 having the same shape, and connecting both coils 42 in series. A semicircular stator hole 4 is formed at the opposite end of the tip portion 41a.
3 and are opposed to each other with a gap G provided.

In addition, at the 90 ° intersection position with the gap position, an inner notch 44 which is a recess for adjusting cogging torque is formed in the both stator holes 43 so as to face outward. Further, each tip portion 41a is individually fixed to the base plate 2 by a screw 21.

Further, the two stators 41 are of a two-layer type, and the overlapping portion of the rear end portion 41b is cut away to provide a step 41c so that the two are flat when overlapped. It is fixed to the base plate 2 by screws 21 penetrating therethrough.

Although the number of turns of each coil 43 is the same, the number of turns of the coil is usually a unit of tens of thousands of turns. Includes errors that can be ignored, for example, differences up to several hundred turns. Also in the present embodiment, the same electronic circuits and the like as those in the first embodiment are provided, and rotation detection and rotation control are performed.

Also in the above embodiment, the following effects are obtained in addition to the same effects as 1) to 5) of the first embodiment.

6) Since the stator 41 has the same shape,
The same parts can be assembled upside down, the parts can be shared, and the number of parts can be reduced. For this reason, manufacturing costs and parts costs can be reduced, and handling can be facilitated.

7) Since the stators 41 having the same shape are arranged symmetrically and the number of turns of the coil 42 of each stator 41 is the same, the magnetic flux due to AC noise or the like generated outside the timepiece is reduced by two coils 42. Therefore, the influence of external noise can be canceled, and an electronically controlled mechanical timepiece resistant to noise can be formed.

8) By providing the inner notch 44 in the stator 41, the cogging torque of the rotor magnet 12b passing through this portion is reduced, and the rotor 12 can obtain a smoother rotation. In particular, since the magnetic pole of the rotor magnet 12b tends to stop in the 90 ° direction with the gap, the inner notch 4
By providing 4, the cogging torque can be effectively reduced by canceling the torque that tends to stop in the gap direction.

9) Since each of the stators 41 is directly connected as a two-layered type, the leakage magnetic flux is reduced, and a step can be formed in the overlapped portion, so that the positioning property at the time of assembling is improved.

FIGS. 8 to 10 show a third embodiment of the present invention. In the figure, a generator 50 has an L-shaped stator 51 of the same shape wound with coils 52 of the same number of turns, and the two coils 52 are connected in series. Further, a semicircular stator hole 53 and an inner notch 54 are formed at each of the leading end portions 51a at 90 ° intersections with the gap G.

Further, as shown in FIG. 9A, a positioning member 60 is provided at the end of the distal end portion 51a on the side of the stator hole 53.
Are provided on the main plate 2. This positioning member 60
Are formed in a ring shape along the stator hole 53.

On the other hand, positioning jigs 55 are arranged on both sides of the distal end portion 51a of the stator 51 instead of the fixing screws.

The positioning jig 55 is similar to a screw,
As shown in FIGS. 9A and 9B, the shaft center 55a is eccentrically supported to be rotatable on the base plate 2, and is shown in FIG. 9A.
In the type shown in FIG. 4, the tip 51a is rotated in a radial direction of the stator hole 53 as shown by an arrow in FIG. It is possible to move toward. Thereby, the stator 51 is brought into contact with the positioning member 60 and the stator 5
The positioning of the tip 51a can be performed accurately and easily.

As the positioning jig 55, FIG.
As shown in (b), a head having a countersunk screw head 55c may be used. In this case, by rotating with the upper surface corner of the tip portion 51a contacting the inclined surface, the tip portion 51a is moved in the radial direction of the stator hole 53 as shown by the arrow in the figure, and the positioning member 60 is moved. Not only contact
The stator 51 is brought into contact with the main plate 2 so that the vertical positioning thereof can be performed.

In any case, the positioning jig 55 is made of a plastic material, for example, softer than the stator material. For example, when the positioning member 60 is not provided, the stator 51
When finely adjusting the position, the positioning jig 55 may be used. After the positioning, it may be fixed by using the screw or the like of the above-described embodiment.

On the rear end 51b of each stator 51, an end of a circuit board 56 connected to the lead wire of each coil 52 is installed as shown in a cross section in FIG. A plate 57 is provided, and a yoke 58 is disposed below the rear end portion 51b.
1 b is fixed to the base plate 2 with screws 21.

In the third embodiment, the same effects as 1) to 3) and 6) to 8) in the first and second embodiments can be obtained, and the following effects are obtained.

10) Since the positioning jig 55 and the positioning member 60 are provided, the positioning of the stator 51 can be performed in a state where the rotor 12 is disposed in the stator hole 53. You can easily set the optimal position of 51,
Position accuracy can be further improved.

11) By fixing the end of the circuit board 56, connection with the lead wire of the coil can be made, and there is no need for a solder connection step of the lead wire, so that it can be connected to an electronic circuit, which is suitable for space saving.

12) Since the positioning jig 55 is made of a material such as plastic, which is softer than each stator 51,
Breakage of each stator 51 by the positioning jig 55 can also be prevented.

13) If a positioning jig 55 having a flat head screw-shaped head 55c and an inclined surface is used, the stator 51
Can be reliably pressed against the main plate 2 and the stator 5
1 rattling can be more reliably prevented.

Next, a fourth embodiment of the present invention will be described. In this embodiment, the same reference numerals are given to the same or similar components as those in the above-described embodiments.
Description is omitted or simplified.

FIG. 11 is a plan view showing a main part of an electronically controlled mechanical timepiece according to this embodiment, and FIGS. 12 and 13 are sectional views thereof.

The electronically controlled mechanical timepiece includes a barrel wheel 1 including a mainspring 1a, a barrel gear 1b, a barrel barrel 1c, and a barrel lid 1d. The mainspring 1a has a barrel gear 1 at the outer end.
b, the inner end is fixed to barrel barrel 1c. Tubular barrel true 1c
Is inserted into a support member provided on the base plate 2, is fixed by a square hole screw 5, and rotates integrally with the square hole wheel 4. The base plate 2 is provided with a calender plate 2a and a disk-shaped dial plate 2b.

The rotation of the barrel gear 1b is performed by a total of 12 rotations via the respective wheel wheels 7 to 11 which are in the same manner as in the first embodiment.
The speed has been increased 6,000 times. At this time, each car 7-1
Reference numerals 1 denote coils 12 provided on different axes to be described later.
It is placed in a position that does not overlap with 4,134, and the mainspring 1a
To form a torque transmission path.

A minute hand (not shown) for displaying time is fixed to the cylindrical pinion 7a engaged with the center wheel & pinion 7, and a second hand (not shown) for displaying time is fixed to the second pinion 14a. Therefore, in order to rotate the second wheel 7 at 1 rph and the second pinion 14a at 1 rpm, the rotor 12 may be controlled to rotate at 5 rps. The barrel gear 1b at this time is 1
/ 7 rph.

The second kana 1 that deviates from the torque transmission path
The backlash of 4a is reduced by the pointer suppressing device 140 provided between the barrel car 1 and the coil 124. The pointer suppressing device 140 includes a pair of linear suppressing springs 141 and 142 surface-treated with Teflon treatment or an intermolecular bonding film, and supports the base end side of each of the suppressing springs 141 and 142 to the second catch 113. It is composed of mustache balls 143 and 144 as fixing members to be fixed.

This electronically controlled mechanical timepiece includes a generator 120 composed of a rotor 12 and coil blocks 121 and 131. The rotor 12 is a rotor kana 12
a, rotor magnet 12b.

The coil blocks 121, 131 are provided with coils 124, 13 on stators (core, magnetic core) 123, 133.
4 is wound. Stator 123,
133, core stator portions 122 and 132 disposed adjacent to the rotor 12, core winding portions 123b and 133b around which the coils 124 and 134 are wound, and core magnetic conduction portions 123a and 133a connected to each other. Are integrally formed.

The stators 123 and 133, that is, the coils 124 and 134 are arranged in parallel with each other. The rotor 12 has core stator portions 122 and 13.
On the second side, the center axis is disposed on the boundary line L between the coils 124 and 134, and the core stator portion 12
2, 132 are configured to be symmetrical with respect to the boundary line L.

At this time, positioning members 60 are arranged in the stator holes 122a and 132a in which the rotors 12 of the stators 123 and 133 are arranged, as shown in FIG. A positioning jig 55 composed of an eccentric pin is arranged between the longitudinally intermediate portions of the stators 123 and 133, that is, between the core stator portions 122 and 132 and the core magnetic conducting portions 123a and 133a. When the positioning jig 55 is turned, the core stator portions 122 and 132 of each of the stators 123 and 133 can be brought into contact with the positioning member 60 to accurately and easily perform the positioning thereof. 133a can be reliably brought into contact with each other.

The number of turns of each of the coils 124 and 134 is the same. Also in the present embodiment, the same number of turns is not limited to the case where the number of turns is completely the same, but also includes a negligible error from the entire coil, for example, a difference of about several hundred turns.

As shown in FIG. 13, the core magnetic conduction portions 123a and 133a of the stators 123 and 133 are connected to each other with their side surfaces in contact. The lower surfaces of the core magnetic conduction portions 123a and 133a are in contact with the yoke 58 disposed across the core magnetic conduction portions 123a and 133a. As a result, in each of the core magnetic conducting portions 123a and 133a,
a and a magnetic conduction path passing through the lower surfaces of the core magnetic conduction portions 123a and 133a and the yoke 58, and two magnetic conduction paths are formed.
The stators 123 and 133 form an annular magnetic circuit. Each of the coils 124 and 134 includes a stator 123 and 13
3 are wound in the same direction as the direction from the core magnetic conduction portions 123a and 133a toward the core stator portions 122 and 132.

The ends of these coils 124 and 134 are connected to the core magnetic conducting portions 123 of the stators 123 and 133.
a, 133a are connected to a coil lead board (not shown) provided on the board.

In the case of using the electronically controlled mechanical timepiece constructed as described above, when an external magnetic field H (FIG. 11) is applied to each of the coils 124 and 134, the external magnetic field H is applied to each of the coils 124 arranged in parallel. , 134 in the same direction, the external magnetic field H is applied in the opposite direction to the winding direction of each coil 124, 134. For this reason,
Since the electromotive voltages generated in the coils 124 and 134 by the external magnetic field H work so as to cancel each other, the influence can be reduced.

According to such a fourth embodiment, 1) to 3), 6), 7), 10) to 13) in each of the above embodiments.
In addition to the same effects as described above, the following effects can be obtained.

14) By arranging the second to sixth wheel wheels 7 to 11 on different axes, it is possible to increase the degree of freedom in the layout design of the second and seventh wheel wheels 7 to 11. By displacing each of the center wheels 7 to 11 toward the rotor 12 by removing them from the transmission path or the like, they can be arranged at positions that do not overlap the coils 124 and 134. Therefore, since the number of windings can be increased by increasing the thickness direction of the coils 124 and 134,
34, the magnetic path length can be shortened, the iron loss can be reduced, and the duration of the mainspring 1a can be extended.

15) Further, since the rotor 12 is arranged on the boundary line L and the stators 123 and 133 are symmetrical, the magnetic paths of the core stator portions 122 and 132 are also the same as those in the first embodiment. In this case, the magnetic path length can be shortened and the iron loss can be reduced.

16) Since two magnetic conduction paths are formed at the core magnetic conduction portions 123a and 133a, the magnetic resistance can be reduced and stabilized. In other words, the magnetic flux in the core magnetic conduction portions 123a and 133a flows more easily in the side direction, but the core magnetic conduction portions 123a and 133a.
In the contact portion between the side surfaces of “a”, the gap is likely to vary from product to product, and the magnetic resistance may vary. On the other hand, if the magnetic conduction path is formed via the yoke 58 as in the third embodiment, the variation in the gap can be reduced, but the magnetic flux is less likely to flow than in the side direction, and the magnetic resistance cannot be reduced so much.

On the other hand, if two magnetic conducting paths are formed as in the present embodiment, the magnetic resistance can be reduced and stabilized. Since the cogging torque is also stabilized by stabilizing the magnetic resistance, the cogging torque can be reduced by providing an inner notch or the like corresponding to the torque. Further, the electromotive voltage can be stabilized, and power generation and braking can be stabilized. Also, the leakage flux can be reduced,
Eddy loss in metal parts can be reduced.

17) The positioning jig 55 is connected to the core stator portions 122 and 132 and the core magnetic conduction portions 123a and 133.
a, one for each of the stators 123 and 133.
The core stator portions 122 and 132 are
Alignment and core magnetic conduction portions 123a, 133a
Can be adjusted. Thereby, the number of positioning jigs 55 can be reduced, the configuration can be simplified, and the cost can be reduced.

18) Since magnetic noise due to the external magnetic field H can be reduced, there is no need to provide a magnetic-resistant plate for a movement component such as the dial 2b of an electronically controlled mechanical timepiece or to use a material having a magnetic-resistant effect for an exterior component. . For this reason, the cost can be reduced and the anti-magnetic plate and the like become unnecessary,
The movement can be reduced in size and thickness, and the layout of each component is not limited to the exterior components, so that the degree of freedom in design is increased, and an electronically controlled mechanical timepiece with excellent design and manufacturing efficiency can be provided.

19) Since the second pinion 14a is out of the torque transmission path, the second pinion 14a does not require a torque transmitting gear or the like overlapping with the barrel car 1, so that the spring 1a can be made thicker by that amount, and The duration of the mainspring 1a can be further extended while maintaining the overall thickness.

Next, a fifth embodiment of the present invention will be described.

The present embodiment is characterized in that the coils 33 and 34 connected in series in the first embodiment are not connected to each other, and their uses are different.
That is, in the present embodiment, similarly to the first embodiment, the first coil 33 and the second coil 34 are wound around each of the stators 31 and 32. And the first coil 33 is
Second coil 3 with a large number of turns used as a braking coil
Reference numeral 4 is exclusively used as a coil for generating power and detecting rotation of the rotor.

FIG. 14 shows the circuit configuration of the IC.
The electronic circuit 240 includes an oscillation circuit 242 that drives the crystal oscillator 241, a frequency dividing circuit 243 that generates a reference frequency signal serving as a time signal based on a clock signal generated in the oscillation circuit 242, A detection circuit 244 for detecting rotation, a comparison circuit 245 for comparing the rotation cycle obtained by the detection circuit 244 with a reference frequency signal and outputting a difference between the rotation cycle and the reference frequency signal. And a control circuit 246 for transmitting a control signal.
Note that a clock signal may be generated using various reference standard oscillation sources or the like instead of the crystal oscillator 241.

Each of the circuits 242 to 246 includes the second coil 34
When the rotor 12 of the generator 30 rotates in one direction in response to the rotation from the wheel train, an AC output is generated in the second coil 34, and this output is converted to a diode 247 and a capacitor. The control circuit (electronic circuit) 240 is driven by the rectified DC current by the rectified DC current.

A part of the AC output of the second coil 34 is extracted as a detection signal of the rotation cycle of the rotor 12 and is input to the detection circuit 244. Second coil 34
The output waveform output from draws an accurate sine wave every rotation cycle, as in FIG. Therefore, the detection circuit 24
4, A / D-converts this signal into a time-series pulse signal, compares this detection signal with a reference frequency signal by a comparison circuit 245, and a control circuit 246 converts a control signal corresponding to the difference into a first coil signal. 33 to a short circuit 249 functioning as a brake circuit.

Then, based on the control signal from the control circuit 246, the short circuit 249 short-circuits both ends of the first coil 33, applies a short brake, and regulates the rotation cycle of the rotor 12.

According to the fifth embodiment, the same effects as those of the above embodiments can be obtained, and the following effects can be obtained.

20) The functions of the coils 33 and 34 wound on the stators 31 and 32 are completely separated, and the first coil 33
Is used only for brake control, and the second coil 34 is used only for power generation and rotation detection.
This eliminates the effect of the electromagnetic brake on the generated voltage, stabilizes the electromotive voltage, and improves the power generation efficiency.

21) Since the output of the second coil 34 is not affected by the electromagnetic brake, a more accurate sine wave can be output as compared with the above-described embodiment in which there is no disturbance in each cycle. The output waveform can be easily detected by converting the value into a value, and the number of rotations of the rotor 12 can be easily detected. Therefore, it is possible to accurately and easily control the timepiece using the output waveform of the generator.

FIG. 15 shows a sixth embodiment of the present invention. The same parts as those in the fifth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described using different reference numerals.

In this embodiment, a rotation sensor 260 for detecting the rotation of the rotor 12 is provided in place of the detection of the AC output waveform, and the detection value of the sensor 260 is input to the detection circuit 244. Same as the form. As the rotation sensor 260, various sensors such as an optical sensor that can detect the rotation of the rotor 12 can be used.

In the above embodiment, the output of the second coil 34 is used only as a power supply for driving the electronic circuit 240.

In this embodiment as well, the same effects as in 20) of the fifth embodiment can be obtained. 22) Since the second coil 34 can be used only for power generation, the power generation efficiency can be improved accordingly. There is an advantage.

However, since the rotation sensor 260 is required separately, the fifth embodiment is more advantageous in terms of cost and structure.

The present invention is not limited to the above embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.

For example, in the second to fourth embodiments, each coil 4 of the two stators 41, 51, 123, 133
Although 2,52,124,134 are wound the same number of times, the number of turns may be different. However, it is preferable that the number of turns be the same in that the external noise can be canceled.

When the shapes of the two stators 31 and 32 are different from each other as in the first embodiment, the number of turns of each of the coils 33 and 34 is appropriately set in accordance with the shapes, so that the external noise May be canceled.

Further, as in the fifth and sixth embodiments,
Without connecting each coil 33, 34 in series, each coil 33, 34
When the functions of the coils 34 are divided, the number of turns of each of the coils 33 and 34 may be set according to the function.

In the above embodiment, the coils are wound around each of the two stators 31, 32, 41, 51, 123 and 133.
A coil may be wound only on 1,51,123,133. The number of turns of the coil and the like may be appropriately set according to the power generation capacity required by the electronically controlled mechanical timepiece.

Further, when the inner notch is formed in the stator hole, a total of two inner notches are formed at the opposed positions in the stator hole in the second and third embodiments, however, one inner notch is formed in the stator hole. Only one may be formed. When only one inner notch is formed, a large notch can be formed, so that the influence of manufacturing variations can be reduced. On the other hand, if two inner notches are formed as in the above-described embodiment, the stator can be made symmetrical and the same part can be used, so that the number of types of parts can be reduced and the manufacturing cost can be reduced. The position of the inner notch is not limited to the 90 ° intersection position with the gap position, but is preferably provided at the 90 ° intersection position since cogging torque can be reduced most effectively. Further, the shape and the like of each stator may be appropriately set in implementation.

[0122]

As described above, according to the electronically controlled mechanical timepiece of the present invention, two stators are combined to form a two-piece stator hole, which is a disadvantage of the conventional integral stator hole. Providing a certain outer notch prevents difficulties in handling and lowering the yield, and can increase the electromotive voltage, which is advantageous in driving the electronic control circuit.In addition, since the voltage waveform is a sine wave, the rotation is detected. And the control system can be easily configured.

[Brief description of the drawings]

FIG. 1 is a plan view of an electronically controlled mechanical timepiece according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is an exploded perspective view of the generator.

FIG. 4 is a circuit block diagram showing a connection form between a generator and an electronic circuit according to the first embodiment of the present invention.

FIG. 5 is a circuit diagram showing the short circuit of FIG. 4;

FIG. 6 is a plan view showing a second embodiment of the present invention.

FIG. 7 is a sectional view taken along line VV of FIG. 6;

FIG. 8 is a plan view showing a third embodiment of the present invention.

9 is a sectional view taken along line VII-VII in FIG.

FIG. 10 is a sectional view taken along line VIII-VIII of FIG.

FIG. 11 is a plan view showing a main part of an electronically controlled mechanical timepiece according to a fourth embodiment of the invention.

FIG. 12 is a sectional view showing a main part of a fourth embodiment.

FIG. 13 is a sectional view showing a main part of a fourth embodiment.

FIG. 14 is a circuit block diagram showing a connection form between a generator and an electronic circuit according to a fifth embodiment of the present invention.

FIG. 15 is a circuit block diagram showing a connection configuration between a generator and an electronic circuit according to a sixth embodiment of the present invention.

FIG. 16 is a plan view of an electronically controlled mechanical timepiece including a conventional generator.

FIG. 17 is an exploded perspective view of the generator.

18A is a graph showing a voltage waveform of a generator according to the present invention, and FIG. 18B is a graph showing a voltage waveform of a conventional generator.

[Explanation of symbols]

Reference Signs List 1 barrel car 1a mainspring 7 second wheel 8 third wheel 9 fourth wheel 10 fifth wheel 11 sixth wheel 12 rotor 12a rotor kana 12b rotor magnet 12c rotor inertia disk 20, 30, 40, 50, 120 generator 31 , 32, 41, 51, 123, 133 Stator 33, 34, 42, 52, 124, 134 Coil 35, 36, 43, 53, 122a, 132a Stator hole 44, 54 Inner notch 55 Positioning jig 55a Shaft center 55b Head Part 55c Head 58 Yoke 60 Positioning member 123a, 133a Core magnetic conduction part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Eiichi Nagasaka 3-5-5 Yamato, Suwa-shi, Nagano Pref. Seiko Epson Corporation

Claims (12)

[Claims] 1. A power train is driven using a mainspring as an energy source, and electric power is generated in a rotating generator in response to rotation from the wheel train, and an electric circuit driven by the electric power causes a rotation cycle of the generator. In the electronically controlled mechanical timepiece that controls the speed by braking the wheel train, the generator includes: a rotor that rotates in connection with the rotation of the wheel train; A stator, a pair of semicircular stator holes formed at one end of both stators and arranged in a circle around the rotor in a state where the two stators are combined, and a winding wound around the outer periphery of at least one of the stators An electronically controlled mechanical timepiece comprising: a coil; 2. The electronically controlled mechanical timepiece according to claim 1, wherein coils are wound around outer circumferences of both stators, and the coils are connected in series. 3. The electronically controlled mechanical timepiece according to claim 1, wherein the coil wound around the outer periphery of the stator serves both for generating electromotive force and for controlling rotation. Electronically controlled mechanical clock. 4. The electronically controlled mechanical timepiece according to claim 1, wherein at least two coils are wound around an outer periphery of the stator, and at least one of these coils is used for rotation control. And at least one of the other coils is used for generating an electromotive force for supplying power to the electronic circuit. 5. The electronically controlled mechanical timepiece according to claim 4, wherein at least one of the coils used for generating the electromotive force also serves to detect the rotation of the rotor. Electronically controlled mechanical clock. 6. The electronically controlled mechanical timepiece according to claim 1, further comprising a positioning member that can abut on an edge of each of the stators on the side of the stator hole, wherein each of the stators is connected to the other. An electronically controlled mechanical timepiece is provided with a positioning jig for pressing the positioning member against the positioning member to bring the stator into contact with the positioning member. 7. The electronically controlled mechanical timepiece according to claim 6, wherein the positioning jig has a slope that is obliquely pressed against an edge of the stator, and the slope enables positioning of the stator in a height direction. An electronically controlled mechanical timepiece characterized by the following. 8. An electronically controlled mechanical timepiece according to claim 1, wherein each of said stators is bilaterally symmetric. 9. An electronically controlled mechanical timepiece according to claim 8, wherein the number of turns of coils wound on both stators is the same. 10. The electronically controlled mechanical timepiece according to claim 1, wherein at least one of opposing positions on the inner periphery of each stator hole has an inner portion for adjusting cogging torque protruding outward. An electronically controlled mechanical timepiece having a notch. 11. The electronically controlled mechanical timepiece according to claim 1, wherein each of the stators has a side surface at the other end opposite to the one end at which the stator hole is formed. An electronically controlled mechanical timepiece characterized in that the lower surface of the other end is in contact with a yoke arranged over each stator. 12. The electronically controlled mechanical timepiece according to any one of claims 1 to 11, wherein each wheel of the wheel train is provided on a different axis so that it does not overlap with the coil. An electronically controlled mechanical timepiece, wherein