JPS62135790A - Two-hand display type electronic wrist watch - Google Patents

Abstract

PURPOSE:To prevent the time delay in the restarting stage without providing a reduction train wheel, more particularly mechanical structure by compensating the hand operation delay arising from the asynchronism of a rotor and circuit output generated by the rotation when a hand setting stem is operated during the operation for hand setting. CONSTITUTION:A time setting mechanism has an electromechanical converter having the rotor 6, a center wheel 3 mounted with the minute hand, the reduction train wheel to transmit driving power from the rotor 6 to the center wheel 3, the hand setting stem 7 and a hand setting train wheel to make hand setting by the rotating operation of the stem 7. The rotor 6 is directly rotated without a slip mechanism by the rotating operation of the stem 7 during the operation for hand setting. A switch mechanism interlocked to the push and pull operation during the hand setting of the stem 7 and an electronic circuit having a waveform shaping circuit to compensate the hand operation delay arising from the mis-operation of the rotor caused by the asynchronism of the rotor 6 and the circuit output are provided to compensate the hand operation delay by the mis-rotation of the rotor 6 arising from the asynchronism of the rotor 6 and the circuit output generated when the rotor is rotated by the operation of the stem 7 during the operation for hand setting.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides an intermittent hand movement using an electromechanical converter.
This invention relates to a time setting mechanism for a hand display type electronic wristwatch.

[Conventional technology]

In general, quartz watches have an accuracy of about 10 seconds per month, so they do not need to be set as frequently as mechanical watches, but they may still need to be set when errors accumulate, or when the battery is replaced at the time of purchase. It is necessary to set the time after the meal.

Various mechanisms for such time adjustment have been considered in the past. One such example is Japanese Patent Application Publication No. 1973-
There is a publication No. 104970.

To do this, the needle alignment torque caused by the rotation of the winding stem is applied to the third wheel, the rotor is also rotated with an appropriate torque, and when the winding stem is released, the rotor is always in a constant phase due to the braking force that acts on the cam. A positioning configuration is described.

[Problem that the invention seeks to solve]

However, with the above configuration, the rotor also rotates when the needle is set, but the cam of the click lever is used to position the rotor at a constant phase, making the structure complex and requiring the use of extra parts. Since it is necessary, it has the disadvantage that the cost is also high.

An object of the present invention is to prevent the time delay at the time of restart without providing any special mechanical structure to the deceleration gear train, even if the rotor is rotated together with the needle alignment operation, by coupling with an electronic circuit. It is designed to prevent this.

[Means for solving problems]

In order to achieve the above object, the present invention provides an electromechanical converter having at least a rotor, a center wheel and pinion to which a minute hand is mounted, and a reduction gear train that transmits power from the rotor to the center wheel.
It is equipped with a winding stem which is an external operation member that can be operated in the axial direction and rotational direction, and a needle setting wheel train for setting the needle by rotating the winding stem. It has a configuration in which the rotor of the electromechanical converter is directly rotated without a Surinoff 0 mechanism, and further includes a switch mechanism that is linked to push/pull operation when setting the needles of the winding stem, and a rotor and a circuit output. Of course, the rotor and circuit output generated as a result of being rotated by the operation of the winding stem during the needle setting operation are provided with an electronic circuit having a compensating/P pulse output means for compensating for a delay in movement of the hands due to a rotational error of the rotor caused by the out-of-synchronization of the rotor. The device is configured to compensate for a delay in hand movement due to a rotational error of the rotor due to non-synchronization of the rotor.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of the crystal oscillation wristwatch according to the present invention, viewed from the back cover side.

On the upper right side of the figure, a switching mechanism operated by a lews (not shown) and a needle setting mechanism are mainly arranged. The mandarin duck 8 is provided so as to straddle the winding stem 7.

Kannuki 9 fixed on mandarin duck 8 and having peak 9b
, the switching lever 10 is swung around the switching lever stud 10a embedded in the base plate 1. A small iron car 11 and an intermediary car 12 meshing therewith are placed on a switching lever 10.

A back press '13 that holds the mandarin duck 8 and a part of the switching lever 10 between the base plate 1 is used to determine the proximity of the pin 8a planted in the mandarin duck 8 by its spring force in the vertical direction. It has two holes 13a and a bent part 13b that presses the battery 38 from the side to provide conduction and stabilize the position of the battery 38, and is fixed to the base plate 1 with two screws. In the mandarin duck 8, an elongated hole 8b in a direction perpendicular to the axial direction of the winding stem 7 is loosely fitted into a shaft 1c planted in the main plate 1.

The (+) spring 8c welded to the mandarin duck 8 is electrically connected to the ←) lead portion 25a of the flexible sheet 25, and contacts the contact point 26 insulated and implanted in the base plate 1 with its spring force in the direction of the upper and lower surfaces. . 1d is a dial foot hole, 35b is a dial pad, and 37 is a mechanical pad, each of which is located in a symmetrical position.

An electromechanical converter serving as a prime mover is placed in the upper left portion of FIG. 1. The coil 19 is held by holding the bent portions at both ends of the winding core 19a in close contact with the end portion of the stator 17, which is attached to the dial side of the main plate 1 with screws, with screws 19e.In addition, a coil holder is used. 29 and is held by a recon comb 31. A magnetic shield plate 36 is fixed with a pin 29a of the coil holder 29 and attached to the main plate 1 with a screw 29b. Reference numeral 18 denotes a stator splicing plate, which has approximately the same shape as the stator 17. Reference numeral 2o designates a Norint plate terminal plate attached to a protruding portion of the coil winding core 19a that is remote from the magnetic circuit.

The center part of Figure 1 shows the deceleration wheel train and the instruction wheel train.
In this embodiment, all of them are located in the lower surface of the main plate 1, that is, in the milling part on the dial side. The rotor 6 of the prime mover is rotated by a stator 17 that receives alternating magnetic flux excited by a coil 19. Fourth wheel and pinion, which is a reduction gear train 5. Third wheel 4. The center wheel & pinion 3 decelerates the rotation of the rotor 6. Fourth wheel 5
．． The lower surface direction of the third wheel 4 is supported by a bracket embedded in the train wheel bridge 2 fixed to the lower surface of the main plate 1.
The center wheel 3 is loosely fitted onto a central shaft 1a planted in the main plate 1. The indicator wheel train 15 and hour wheel 16 receive rotation from the deceleration wheel train. The hi-no-ura wheel 15 is located between the main plate 1 and the 4-day indicator 14 screwed to the main plate 1, and is also rotated by the intermediary wheel 12 of the needle turning mechanism when setting the hands. The reduction gear train is almost invisible from the back cover side.

The bottom side of Figure 1 is the electronic circuit section, and the right side is the battery section. The circuit base 21 on which the electronic circuit components are mounted is made of nickel silver material, and a thin flexible conductive sheet 25 having conductive turns is attached to the lower surface thereof. The circuit base 21 is placed on the milling part 1j of the main plate 1, and the upper surface of the main plate 1 is at the same height as the upper surface of the main plate 1, and is arranged substantially in a plane with the reduction gear train. 22 is a crystal resonator, 23 is an IC chip, 24 is a temperature compensation capacitor, and 28 is a trimmer capacitor. The end face of the crystal resonator 22 is pressed and held by the spring force of the bent portion 21e provided on the circuit base 21 and the bridge 21f. Similarly, the temperature compensation capacitor 24 is held by the spring force of the bent portion 21i. 2
1g is a coil connection portion in which the conductive sheet 25 also has the same shape, and presses the coil terminal plate 20 with spring force. 25a
A cable 25c extending to the contact point 26 of the H sheet 25 is a cable in which a conductive pattern that does not fit within the plane of the circuit base 21 of the conductive sheet 25 is provided along the side surface of the crystal resonator 22. 27 is the battery 38 (→ spring, rivet 27
It is fixed by caulking a to the circuit base 21. The circuit base 21 is fixed to the base plate 1 with screws 21a and the like. The milling part 1j of the main plate 1 in which the circuit board 21 is accommodated has thick parts le, If, and Ig left on the outer periphery of the main board to match the recessed parts of the circuit board 21, and these are located on the inner periphery of the case. It has the function of determining the position of the movement in conjunction with other parts.

FIG. 2 is a sectional view taken along line A-A in FIG.

The winding stem 7 is loosely fitted into a horizontal hole in the main plate 1, and a stepped portion 7b formed at the cut-up portion of the tooth splitter of the tooth portion 7a at the tip engages with the mandrel 8. The small iron car 11 is rotatably mounted on the switching lever 10 by means of seats 11a and rivets 11b so as to provide an appropriate axial clearance, and the intermediary wheel 12 is similarly attached to the switching lever 10 by rivets 12a. The switching lever 10 is the stud 1
It is held on the main plate 1 at 0a. A portion 11b' of the stud 11b of the small iron car 11 that protrudes from the switching lever 10 has a reverse slope. From the right end of FIG. 2, the rotor 6 has a magnet 6a inserted in a hole in the stator 17, a pinion 6c that fixes it via a seat 6b, a fourth wheel & pinion 5, a third wheel & pinion 4. The center wheel 3 is shown. The shaft support of the rotor 6 in the direction of the lower surface (direction of the dial) is a bush 18b implanted in the stator plate 18. 2 is a train wheel bridge located close to the dial 35. The central axis 1a is installed perpendicularly to the plane of the base plate 1 with high precision. 3a is a washer that softens the friction between the hour wheel 16 and the center wheel 3, and 32 is a dial washer. The Hinouraguruma 15 is regulated in the downward direction by a protrusion 14a provided on the Hinoibuke 14. 39 is the back cover, and 36 is the windshield. When the winding stem 7 is pulled out and rotated, the rotation is transmitted to the rotor 6, and a needle setting operation is performed.

FIG. 3 is a sectional view taken along line D-D in FIG. 1.

A cannula 9 for swinging the small iron car 11 and the like is fastened to the mandarin duck 8 with screws 9a. Step part 7 of winding stem 7 of mandarin duck 8
The portion 8d that engages with the winding stem 7 is cut into a semicircular shape, and Ik is a hole into which a jig is inserted to push up the winder 8 and disengage it from the winding stem 7. The pin 8a installed in the mandarin duck 8 slides on the edges of the two holes 13a of the back pusher 13, and performs a click operation when the winding stem 7 is pulled out or pushed in.

13b is a spring portion that presses the battery 38, and 13d is a set screw of the back press 13. 38a is conductive rubber/
It is. Press the battery 38 into the recess 39a of the back cover 39 (
→The spring 27 has an insulating coating on its lower surface, I is fixed to the circuit base 21 with studs 27a, 27b is solder for conducting, and 25a is a lead-out portion to the contact 26.

FIG. 4 is a sectional view taken along line CC in FIG. 1.

Pull-out portion 2 of the conductive sheet 25 that has passed through the lower surface side of the battery 38
5a/'i is connected to a fixed contact 26 via a ground plate IK insulating bushing 26a with a hang 26b. A contact spring 8c, which is point-welded to the mandarin duck 8 located between the back pusher 13 and the base plate 1 with the mandarin shaft 1c as the center of rotation, is normally in contact with the contact 26.

35 is a dial plate, 35a is a dial foot, and 35b is a dial screw.

FIG. 5 is a block diagram of the electronic circuit of the present invention, and FIG.
The figure is a waveform diagram of the drive voltage supplied to the coil.

The switch spring 8c, which is at Vdd, swifts the switch circuit 40 including the differentiating circuit and the shaping circuit. oscillation in which the output of the switch circuit 40 is connected to the reset R;
The frequency dividing circuit 41 has outputs Ql + Q2 + . . . of appropriate flip-flop circuits at each stage.

The waveform shaping circuit 42 is composed of a NAND circuit that inputs only Ql with the highest frequency among the inputs through an inverter circuit, and an alternating i? The signal is output to a drive circuit 43 that causes a pulse current to flow. Further, the power terminals of these electronic circuits are connected via a switch 8c. Therefore, when the hand setting operation is completed and the crown is pushed back, the switch 8c is closed and power is turned on to all rol path elements, but in an instant, the frequency dividing circuit 41 is reset, so that the ° coil 1
9, the current flows for too little time to drive the rotor 6 mentioned above. When the Lewes is pushed back, a time period approximately equal to the time constant of the differential circuit of the switch circuit 40, for example, approximately 10m5, which is longer than the time for the needle rotation gear train to disengage from the instruction gear train and the deceleration gear train, elapses. , the reset of the frequency dividing circuit 41 is canceled and there is a delay of the pulse width of Ql, but immediately, at the reset release point 50, the waveform shaping circuit 42 outputs the positive compensation/P pulse 51, and the pulse tffi flows through the coil 19. . This is because, as mentioned above, the rotor 6 rotates when the needle is turned, so the direction of the magnetic pole is not determined when the needle is turned.1. Drive circuit・↓３
Since the stable state of the internal flip-flop circuit is not determined when the power is turned on, current flows through the coil 19 immediately when the crown is pushed back, and the output direction of the drive circuit 43 and the magnetism of the rotor 6 mentioned above are changed. If the direction is correct, the clock is held still for one step, and if it is not, it is held still, and the rotor 6 rotates and moves the hands accurately with the normal pulse 52 at the subsequent accurate movement interval, thereby making the clock's instructions advance. Also, try not to give late instructions. After a certain period of time after the compensation pulse 51 is output, a normal pulse 52 having a phase opposite to that of the compensation/2 pulse 51 is output, but due to the output of the compensation/malus 51, the rotor 6 has already been compensated to synchronize with the pulse. Therefore, from the output of the normal pulse 52, the hands will move as usual.

In this embodiment, it has been shown that the battery 38 can be prevented from being consumed when storing the clock by cutting off the power supply, but if the battery capacity is sufficient, the oscillation circuit and frequency dividing circuit can be configured to continue operating. It's okay.

In this embodiment, the compensation pulse is output immediately after the reset is released, but a compensation pulse that covers delays and miscounts may be output within a period of time that the user does not have any doubts about.

According to the above embodiment, if the watch is a two-hand watch, the time will start from 10 seconds.
In a two-hand watch with a small reduction ratio for 60-second movement, the rotor's 2
The holding force at ≠ matches the torque when aligning the needles,
In particular, it is not so strong that it becomes difficult to turn the crown, and there is no need to improve the strength of the hand-setting wheel train, and it is also not so weak that the crown tends to spin freely. Furthermore, since the rotor does not rotate at high speed, there is no possibility of damage to the rotor.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, there is no problem when the user tries to set the hands, and from the point of view of the watch structure, there is no problem with the conventional slip mechanism between the rotor and center wheel. This eliminates the need for a brake mechanism for the reduction wheel train, and it is possible to achieve great effects such as simplifying the structure of the watch and making it possible to obtain a highly reliable timepiece.

[Brief explanation of drawings]

FIG. 1 is a plan view of the electronic wristwatch of the present invention as seen from the back cover side;
Figure 2 is a sectional view taken along line A-A in Figure 1, and Figure 3 is a cross-sectional view taken along line D-- in Figure 1.
4 is a sectional view taken along line CC in FIG. 1, FIG. 5 is a block diagram of the electronic circuit of the present invention, and FIG. 6 is a supply to the coil. FIG. 3 is a waveform diagram of driving voltage. 1...Main plate, 1a...Center axis, 3...2nd wheel, 4.
...3rd wheel, 5...4th wheel, 6...rotor, 7...
・Rolling stem, 11... Kotetsu car, 12... Brokerage car, 15...
・Hinori wheel, 16・Hour wheel, 17・Stator, 19・
・Coil, 33.. Hour hand, 34.. Minute hand, 40.. Sinch circuit, 41.. Frequency dividing circuit, 42.. Waveform shaping circuit, 43.. Drive circuit, 51.. Compensation. ,5
2...Normal/Yarus. Applicant: Citizen Watch Co., Ltd., 1″・〕, ・-1,
3 Figure 4 Figure 5 M56 ζ

Claims (1)

[Claims] An electromechanical converter having at least a rotor, a center wheel and center wheel to which a minute hand is attached, a reduction gear train that transmits power from the rotor to the center wheel, and an external operating member operable in the axial direction and rotational direction. It is equipped with a winding stem and a needle setting wheel train for performing needle alignment by rotating the winding stem, and the rotor of the electromechanical converter is directly coupled without a slip mechanism by rotating the winding stem during needle alignment. and a switch mechanism that is linked to the pushing and pulling operation of the winding stem when setting the hands, and a compensation that compensates for a delay in hand movement due to a rotational error of the rotor due to asynchrony between the rotor and the circuit output. and an electronic circuit having a pulse output means, which compensates for a delay in movement of the hands due to a rotation error of the rotor due to asynchrony between the rotor and the circuit output resulting from rotation by the operation of the winding stem during a needle setting operation. A two-hand display type electronic wristwatch.