JP2013108795A - Display switching device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display switching device and electronic apparatus which can quickly switch display of a display wheel.SOLUTION: A display switching device comprises a differential wheel 23 to which rotation of a second step motor 14 is transmitted through a fourth and fifth intermediate wheels 19 and 20, thereby rotating. The differential wheel 23 comprises: a first differential gear 26 rotating by engaging the fifth intermediate wheel 20; a second differential gear 27 rotating by engaging a feed wheel 24 for switching display by rotating a display wheel 4, the rotation of which is regulated by a regulation member 25 in an engageable/disengageable manner; and a torque applying member 28 applying a positional deviation as torque to the second differential gear 27, the positional deviation generated by the rotation of the first differential gear 26 to the second differential gear 27. Therefore, the rotation of the second differential gear 27 is regulated by the regulation member 25, and thereby the positional deviation is generated between the first differential gear 26 and the second differential gear 27 in a rotation direction. When the regulation of the regulation member 25 to the second differential gear 27 is released in this state, the second differential gear 27 quickly rotates, thereby rotating the display wheel 4.

Description

  The present invention relates to a display switching device and an electronic device used in devices such as a clock, a calendar device, or a meter of a meter.

  For example, in a display switching device used in a wristwatch, as described in Patent Document 1, the rotation of a step motor is transmitted to an indicator wheel by an intermediate wheel, and the rotation of the pointer wheel is transmitted by another intermediate wheel. It is transmitted to a transmission vehicle that is a Geneva vehicle, and the claw wheel is rotated with the rotation of this transmission vehicle, and the feed wheel is intermittently rotated by this claw vehicle, thereby rotating the display vehicle by this feed vehicle, A device configured to switch the display of a display vehicle is known.

JP 2009-198437 A

  However, in such a wristwatch display switching device, the claw wheel makes one rotation in 24 hours by the transmission wheel, and the feed wheel is rotated by a predetermined angle each time the claw wheel makes one rotation. Since it is configured to switch the display by rotating the display vehicle by a predetermined angle by rotation, it takes about 3 to 4 hours from the start of the display vehicle to the completion of the display switching. In the meantime, there is a problem that the display is displayed in a state of being shifted halfway.

  The problem to be solved by the present invention is to provide a display switching device and an electronic device that can quickly switch the display of a display vehicle.

  The present invention includes a transmission wheel that is rotated by transmission of rotation of a drive source, a differential wheel that rotates by rotation of the transmission wheel, a feed wheel that rotates intermittently by rotation of the differential wheel, and rotation of the feed wheel The display switching device includes a display wheel that is rotated to switch the display and a regulating member that removably regulates the rotation of the differential wheel, and the differential wheel meshes with the transmission wheel and rotates. A first differential gear and a second differential gear that is rotatably provided on the same axis as the first differential gear and that meshes with the feed wheel to rotate and is removably restricted by the restricting member. A display switching device comprising: a gear, and a rotation force applying member that applies to the second differential gear as a rotational force a positional shift caused by the rotation of the first differential gear with respect to the second differential gear. Device.

  According to the present invention, when the display of the display wheel is switched, even if the first differential gear of the differential wheel is rotated by the transmission wheel, the rotation of the second differential gear is restricted by the restriction member, and the first difference gear is changed. The moving gear and the second differential gear are displaced in the rotational direction, and the rotational force due to the displacement can be applied to the second differential gear by the rotational force applying member. For this reason, when the restriction of the restriction member for the second differential gear is released, the second differential gear that is displaced with respect to the first differential gear can be quickly rotated. Can be quickly switched.

It is the expanded back view which showed the timepiece module in one Embodiment which applied this invention to the pointer-type electronic wristwatch. FIG. 2 is an enlarged cross-sectional view of a main part showing a first drive system in the timepiece module shown in FIG. 1. FIG. 4 is an enlarged cross-sectional view of a main part showing a second drive system in the timepiece module shown in FIG. 1. FIG. 2 is an enlarged plan view of the timepiece module shown in FIG. 1. The differential wheel of the display switching device in the timepiece module shown in FIG. 4 is shown, (a) is an exploded plan view of the main part showing a state in which the rotational positions of the first differential gear and the second differential gear are shifted. (B) is the exploded top view of the principal part which showed the state where each magnetic pole of a 1st differential gear and a 2nd differential gear attracted | matched and corresponded mutually. It is an expanded sectional view of the principal part which showed the regulating member in the timepiece module shown in FIG. FIG. 5 is an enlarged plan view showing a state in which the restriction of the restriction member for the second differential gear is released in the timepiece module shown in FIG. 4.

Hereinafter, an embodiment in which the present invention is applied to a pointer-type electronic wristwatch will be described with reference to FIGS.
As shown in FIG. 1, the electronic wristwatch includes a watch module M incorporated in a watch case. As shown in FIGS. 1 to 3, the timepiece module M includes a first drive system 5 that drives the second hand 1 and the minute hand 2, and a second drive system 6 that drives the hour hand 3 and the display wheel 4. .

  As shown in FIGS. 1 and 2, the first drive system 5 includes a first step motor 7, a fifth wheel 8 rotated by the first step motor 7, and a fourth wheel rotated by the fifth wheel 8. A second hand wheel 9, a third wheel 10 rotated by the second hand wheel 9, and a minute hand wheel 11 which is a second wheel rotated by the third wheel 10. It is the structure arrange | positioned through the intermediate receptacle 29 between these.

  In this case, as shown in FIGS. 1 and 2, the first step motor 7 includes a stator 7a, a coil portion 7b provided on the stator 7a, and a rotor 7c disposed between the stator 7a. The rotor 7c is configured to perform step rotation by a magnetic field generated in the stator 7a by the coil portion 7b. The fifth wheel & pinion 8 is configured to mesh with the rotor kana 7d of the rotor 7c and rotate.

  As shown in FIGS. 1 and 2, the second hand wheel 9 that is the fourth wheel is configured to mesh with the pinion 8 a of the fifth wheel 8 and rotate to move the second hand 1. The second hand wheel 9 includes a second hand shaft 9a. The second hand shaft 9a protrudes above the main plate 12, and the second hand 1 is attached to the protruding upper end portion. The third wheel & pinion 10 is configured to mesh with the pinion 9b of the second hand wheel 9 and rotate.

  As shown in FIGS. 1 and 2, the minute hand wheel 11 that is the second wheel is configured to mesh with the pinion 10 a of the third wheel 10 and rotate to move the minute hand 2. The minute hand wheel 11 includes a cylindrical minute hand shaft 11a. The second hand shaft 9a is rotatably inserted into the minute hand shaft 11a. The minute hand shaft 11a protrudes above the main plate 12 together with the second hand shaft 9a, and the minute hand 2 is attached to the protruding upper end portion.

  On the other hand, as shown in FIGS. 1 and 3, the second drive system 6 includes a second step motor 14 and first to third intermediate wheels 15 to which the rotation of the second step motor 14 is sequentially transmitted. 17, hour hand wheel 18 which is a hour wheel rotated by the third intermediate wheel 17, fourth and fifth intermediate wheels 19 and 20 to which the rotation of the hour hand wheel 18 is sequentially transmitted, and the fifth intermediate wheel And a display switching device 21 operated by the car 20.

  In this case, the second step motor 14 and the first to third intermediate wheels 15 to 17 of the second drive system 6 are interposed between the main plate 12 and the train wheel bridge 13 like the first drive system 5. 29. Further, the hour hand wheel 18, the fourth and fifth intermediate wheels 19, 20 and the display switching device 21 in the second drive system 6 are arranged between the main plate 12 and the presser plate 22 as shown in FIG. 3. Has been placed.

  As shown in FIGS. 1 and 3, the second step motor 14 includes a stator 14a, a coil portion 14b provided in the stator 14a, and a rotor 14c disposed between the stator 14a, and the coil portion 14b. Thus, the rotor 14c is configured to rotate stepwise by the magnetic field generated in the stator 14a.

  As shown in FIGS. 1 and 3, the first intermediate wheel 15 is configured to mesh with the rotor kana 14 d of the rotor 14 c and rotate. The second intermediate wheel 16 is configured to mesh with the pinion 15a of the first intermediate wheel 15 and rotate. The third intermediate wheel 17 is configured to mesh with the pinion 16a of the second intermediate wheel 16 and rotate. As shown in FIG. 3, the hour hand wheel 18 that is an hour wheel is configured to mesh with the pinion 17 a of the third intermediate wheel 17 and rotate to move the hour hand 3.

  As shown in FIGS. 2 and 3, the hour hand wheel 18 includes a cylindrical hour hand shaft 18a. At this time, the hour hand wheel 18 is configured to be rotatably held by a presser plate 22 disposed on the main plate 12 with the minute hand shaft 11a being rotatably inserted into the hour hand shaft 18a. The hour hand 3 is attached to the upper end of the hour hand shaft 18a. The hour hand 3 rotates once in 12 hours and displays the time for 12 hours, and is configured to rotate twice in one day (24 hours).

  In this case, a dial 30 is arranged on the upper surface of the presser plate 22 as shown in FIGS. The dial 30 is provided with a through hole 30a into which the respective needle shafts 9a, 11a, and 18a of the second hand 1, the minute hand 2, and the hour hand 3 are inserted from below to protrude above the dial 30. As a result, the second hand 1, the minute hand 2, and the hour hand 3 have their respective needle shafts 9a, 11a, 18a protruding above the dial plate 30 through the through holes 30a of the dial plate 30, and the protruding needle shafts 9a, 11a, 18a. In this state, the needle shaft 9a, 11a, 18a is rotated to move the dial 30 above the dial 30.

  By the way, as shown in FIGS. 3 and 4, the display switching device 21 includes a fourth intermediate wheel 19 that rotates in mesh with the hour hand wheel 18 and a fifth intermediate wheel that rotates in mesh with the pinion 19 a of the fourth intermediate wheel 19. A differential wheel 23 rotated by a car 20a of the fifth intermediate wheel 20, a feed wheel 24 rotated intermittently by the differential wheel 23, a display wheel 4 rotated by the feed wheel 24, and a differential wheel And a restricting member 25 that removably restricts the rotation of the cover 23, and these are arranged between the base plate 12 and the presser plate 22.

  As shown in FIGS. 3 to 5, the differential wheel 23 can rotate on the same axis as the first differential gear 26 and the first differential gear 26 that rotates in mesh with the pinion 20 a of the fifth intermediate wheel 20. A second differential gear 27 that rotates in mesh with the feed wheel 24 and that is removably restricted by a restricting member 25, and a first differential gear 26 with respect to the second differential gear 27. And a rotational force applying member 28 that applies a positional shift caused by the rotation to the second differential gear 27 as a rotational force.

  In this case, the first differential gear 26 is made of magnetized metal, and is rotatably attached to a support shaft 23a provided between the base plate 12 and the presser plate 22, as shown in FIGS. It has been. The first differential gear 26 is configured such that the tooth portion 26a of the outer peripheral portion thereof meshes with the pinion 20a of the fifth intermediate wheel 20 and rotates in this state by the rotation of the fifth intermediate wheel 20. The first differential gear 26 is configured to rotate at a predetermined angle, for example, in the range of 30 to 55 degrees, preferably 48 degrees, when the hour hand 3 rotates twice a day.

  The second differential gear 27 is made of magnetized metal, and, as shown in FIGS. 3 and 4, the second differential gear 27 overlaps the first differential gear 26 on the support shaft 23 a to which the first differential gear 26 is attached. It is attached so that it can rotate freely. The second differential gear 27 is configured to rotate to rotate the feed wheel 24 when the teeth 27a of the outer peripheral portion thereof mesh with the feed wheel 24 and the restriction by the restriction member 25 is released in this state. Has been.

  As a result, the first differential gear 26 and the second differential gear 27 are in a state in which the rotation of the second differential gear 27 is regulated by the regulating member 25 as shown in FIGS. When the differential gear 26 is rotated by the fifth intermediate wheel 20, the rotational position of the first differential gear 26 is deviated from the second differential gear 27.

  As shown in FIGS. 5A and 5B, the rotational force applying member 28 is magnetized on the first magnet portion 31 magnetized on the first differential gear 26 and on the second differential gear 27. The magnetic poles (N, S) of the first magnet unit 31 and the magnetic poles (S, N) of the second magnet unit 32 are attracted to each other. As a result, the rotational force applying member 28 is configured to apply a positional shift caused by the rotation of the first differential gear 26 relative to the second differential gear 27 to the second differential gear 27 as a rotational force.

  That is, the rotational force applying member 28 is in a state where the rotational position of the first differential gear 26 is deviated from the second differential gear 27 as shown in FIGS. 5 (a) and 5 (b). When the restriction by the restriction member 25 on the second differential gear 27 is released, the magnetic poles (S, N) of the second magnet part 32 are attracted to the magnetic poles (N, S) of the first magnet part 31. The second differential gear 27 is configured to rotate.

  On the other hand, as shown in FIGS. 4 and 6, the regulating member 25 regulates the regulation lever 33 that regulates the rotation of the second differential gear 27 of the differential wheel 23 and the regulation lever 33 that regulates the second differential gear 27. A restriction release wheel 34 to be released and a sixth intermediate wheel 35 for rotating the restriction release wheel 34 are provided. In this case, the sixth intermediate wheel 35 is configured to mesh with the hour hand wheel 18 that is an hour wheel and rotate.

  As shown in FIGS. 4 and 6, the regulation release wheel 34 is attached to a rotary shaft 36 that is rotatably provided between the main plate 12 and the presser plate 22. The restriction release wheel 34 is configured such that the tooth portion 34a of the outer peripheral portion thereof meshes with the pinion 35a of the sixth intermediate wheel 35 and rotates in accordance with the rotation of the sixth intermediate wheel 35 in this state. Further, the regulation release wheel 34 is provided with a cam wheel 37 at the center thereof. The cam wheel 37 is provided with a cam protrusion 37a on its outer peripheral portion, and is configured to rotate once (360 degrees) together with the regulation release wheel 34 when the hour hand wheel 18 rotates twice a day. .

  As shown in FIG. 6, the regulation lever 33 is attached to a rotary shaft 38 that is rotatably provided between the main plate 12 and the presser plate 22. As shown in FIGS. 4 and 6, the restriction lever 33 is disposed on the outer periphery of the restriction arm portion 40 that restricts the rotation of the second differential gear 27 of the differential wheel 23 and the cam wheel 37 of the restriction release wheel 34. The interlocking arm portion 41 and the tip end portion 40a of the regulating arm portion 40 are elastically contacted between the tooth portions 27a of the second differential gear 27, and the tip end portion of the interlocking arm portion 41 is elastically applied to the outer peripheral portion of the cam wheel 37. And a spring portion 42 to be brought into contact with.

  In this case, as shown in FIG. 4, the position of the spring portion 42 is regulated by abutting the tip portion of the spring portion 42 against the fixing pin 43. Accordingly, as shown in FIG. 7, when the cam wheel 37 of the restriction release wheel 34 is rotated once by the sixth intermediate wheel 35, the restriction lever 33 moves the tip end portion 40 a of the restriction arm portion 40 to the cam protrusion 37 a of the cam wheel 37. As a result, the restricting arm portion 40 rotates about the rotation shaft 38 against the spring force of the spring portion 42, and the tip end portion 40 a of the restricting arm portion 40 is moved from the tooth portion 27 a of the second differential gear 27. It is configured to release the restriction on the second differential gear 27.

  Incidentally, as shown in FIGS. 3 and 4, the feed wheel 24 is arranged at a predetermined angle when the second differential gear 27 of the differential wheel 23 rotates in a state where it is disposed in the vicinity of the outer peripheral surface of the differential wheel 23. The display wheel 4 is configured to rotate only by a predetermined angle. As shown in FIG. 3, the feed wheel 24 is provided with a rotation shaft 24 b at the center thereof, and the rotation shaft 24 b is rotatably attached between the main plate 12 and the presser plate 22. .

  As shown in FIGS. 3 and 4, the outer periphery of the feed wheel 24 meshes with a tooth portion 27 a of the second differential gear 27 of the differential wheel 23 and a plurality of meshes with internal teeth 4 a described later of the display wheel 4. A tooth portion 24a is provided. The feed wheel 24 has a total of six teeth 24a, and any one of the teeth 24a meshes with the teeth 27a of the second differential gear 27 and rotates. .

  As shown in FIGS. 3 and 4, the display wheel 4 is a date wheel, for example, and is formed in a flat ring shape. On the surface of the display wheel 4, date displays (not shown) corresponding to 1st to 31st are displayed at equal intervals. Further, as shown in FIG. 3, the display wheel 4 is configured such that an inner tooth 4a is provided on an inner peripheral portion thereof and each tooth portion 24a of the feed wheel 24 is sequentially meshed with the inner tooth 4a.

  Thereby, as shown in FIGS. 3 and 4, the display wheel 4 rotates by a predetermined angle with the intermittent rotation of the feed wheel 24, and the date display corresponding to the display window portion 30 b of the dial 30 is switched. It is configured as follows. In this case, the display window portion 30 b is provided at the 3 o'clock position of the dial 30. Further, as shown in FIGS. 4 and 5, the display wheel 4 is quickly rotated by the rotation of the second differential gear 27 of the differential wheel 23 when the date display corresponding to the display window 30b is switched. The date display corresponding to the display window 30b is switched.

Next, the operation of the display switching device 21 in such a pointer-type electronic wristwatch will be described.
The display switching device 21 transmits the rotation of the second step motor 14 to the hour hand wheel 18 which is an hour wheel. When the hour hand wheel 18 rotates twice a day, the rotation of the hour hand wheel 18 is fourth, Each of the fifth intermediate wheels 19 and 20 is transmitted to the first differential gear 26 of the differential wheel 23. At this time, the first differential gear 26 rotates, but the second differential gear 27 of the differential wheel 23 does not rotate because its rotation is restricted by the restricting member 25.

  In other words, in the restricting member 25, the rotation of the hour hand wheel 18 is transmitted to the restriction releasing wheel 34 via the sixth intermediate wheel 35, and the restriction releasing wheel 34 rotates together with the cam wheel 37, and the interlocking arm portion 41 of the restriction lever 33. Of the cam wheel 37 slides along the outer peripheral surface of the cam wheel 37. However, at this time, the distal end portion of the interlocking arm portion 41 does not reach the cam protrusion 37 a of the cam wheel 37. For this reason, as shown in FIG. 4, the restriction lever 33 has its tip end portion 40 a pressed against the tooth portion 27 a of the second differential gear 27 by the spring force of the spring portion 42. Accordingly, the rotation of the second differential gear 27 is restricted by the restriction member 25.

  Thus, when the hour hand wheel 18 rotates twice a day, as shown in FIG. 5A, the first differential gear 26 of the differential wheel 23 has a predetermined angle, for example, 30 to 55 degrees. Even if it rotates in the angle range, preferably 48 degrees, the second differential gear 27 does not rotate because it is regulated by the regulating lever 33 of the regulating member 25.

  Therefore, as shown in FIG. 5A, the first differential gear 26 and the second differential gear 27 are overlapped with each other, and the rotational position of the first differential gear 26 is in the second differential gear 27. The magnetic pole of the first magnet portion 31 of the first differential gear 26 and the magnetic pole of the second magnet portion 32 of the second differential gear 27 are 30 degrees to 55 degrees. In the angle range, it is preferably shifted by an angle of 48 degrees.

  In this state, when the hour hand wheel 18 rotates twice, the restriction of the restriction member 25 with respect to the second differential gear 27 is released. That is, when the hour hand wheel 18 rotates twice, as shown in FIG. 7, the regulation release wheel 34 rotates once, and the cam wheel 37 also rotates one time, so that the cam protrusion 37a of the cam wheel 37 interlocks. The tip of the arm part 41 is pushed. As a result, the interlocking arm portion 41 rotates around the rotation shaft 38 against the spring force of the spring portion 42, the tip end portion 40a of the restriction arm portion 40 is separated from between the tooth portions 27a of the second differential gear 27, The restriction on the second differential gear 27 is released.

  When the restriction on the second differential gear 27 is released in this way, the magnetic poles of the first magnet portion 31 of the first differential gear 26 and the magnetic poles of the second magnet portion 32 of the second differential gear 27 become magnetic forces. As a result, the second differential gear 27 quickly rotates by a predetermined angle as shown in FIG. 5B.

  That is, the magnetic poles of the first magnet portion 31 of the first differential gear 26 and the magnetic poles of the second magnet portion 32 of the second differential gear 27 are shifted as shown in FIG. The magnetic pole of the second magnet portion 32 of the second differential gear 27 is attracted to the magnetic pole of the first magnet portion 31 of the first differential gear 26 by the magnetic attractive force, and as shown in FIG. In addition, the second differential gear 27 rotates quickly.

  When the second differential gear 27 rotates quickly in this way, as shown in FIG. 4, the rotation of the second differential gear 27 causes the feed wheel 24 to quickly rotate by a predetermined angle. As a result, the display wheel 4 quickly rotates by a predetermined angle. Thereby, the date display of the display wheel 4 corresponding to the display window part 30a of the dial 30 is quickly switched.

  After the date display is thus switched, the first differential gear 26 of the differential wheel 23 rotates with the rotation of the hour hand wheel 18, and the restriction release wheel 34 of the restriction member 25 also rotates with the cam wheel 37. At this time, the distal end portion of the interlocking arm portion 41 of the regulating lever 33 of the regulating member 25 gets over the cam projection 37a, so that the regulating arm portion 40 is pushed toward the second differential gear 27 by the spring force of the spring portion 42, The distal end portion 40a of the restriction arm portion 40 is inserted between the tooth portions 27a of the second differential gear 27, and the rotation of the second differential gear 27 is restricted. Thereby, preparation for the next display switching is performed.

  As described above, according to the display switching device 21, the difference between the rotation of the second step motor 14 that is the driving source is transmitted through the fourth and fifth intermediate wheels 19 and 20 that are the transmission wheels. The moving wheel 23, the feed wheel 24 that rotates intermittently by the rotation of the differential wheel 23, the display wheel 4 that is rotated by the rotation of the feed wheel 24, and the display is switched, and the rotation of the differential wheel 23 is releasably restricted. The differential wheel 23 includes a first differential gear 26 that rotates in mesh with the fifth intermediate wheel 20, and is rotatably provided on the same axis as the first differential gear 26. The second differential gear 27 that rotates while meshing with the feed wheel 24 and whose rotation can be engaged and disengaged by the restricting member 25, and the positional deviation caused by the rotation of the first differential gear 26 with respect to the second differential gear 27. As a rotational force, the second differential gear 27 By and a rotational force applying member 28 to impart, it can be switched quickly the display of the display wheel 4.

  That is, in the display switching device 21, even when the first differential gear 26 of the differential wheel 23 is rotated by the fifth intermediate wheel 20 when the display of the display wheel 4 is switched, the second differential gear 27 is not restricted. 25, the first differential gear 26 and the second differential gear 27 are displaced in the rotational direction, and the rotational force due to the positional displacement is applied to the second differential gear 27 by the rotational force applying member 28. Can be granted. For this reason, when the restriction of the restriction member 25 with respect to the second differential gear 27 is released, the second differential gear 27 that is displaced with respect to the first differential gear 26 can be quickly rotated. Thereby, the display of the display vehicle 4 can be switched quickly.

  In this case, the rotational force imparting member 28 includes a first magnet part 31 magnetized by the first differential gear 26 and a second magnet part 32 magnetized by the second differential gear 27, and Since the magnetic poles (N, S) of the magnet part 31 and the magnetic poles (S, N) of the second magnet part 32 attract each other, the rotation direction of the first differential gear 26 with respect to the second differential gear 27 Can be reliably and satisfactorily applied to the second differential gear 27 as a rotational force by the magnetic attractive force, and the structure is simple and the number of parts can be obtained by using the magnetic attractive force. There are few, and assembly work can be done easily.

  Further, in this display switching device 21, the restriction member 25 is a restriction lever 33 that restricts the rotation of the second differential gear 27 of the differential wheel 23 and a restriction that releases the restriction by the restriction lever 33 on the second differential gear 27. By providing the release wheel 34, when the restriction release wheel 34 makes one rotation, the restriction of the restriction lever 33 with respect to the second differential gear 27 can be released. The misaligned second differential gear 27 can be quickly rotated.

  In this case, the restriction lever 33 includes a restriction arm portion 40 that restricts the rotation of the second differential gear 27 of the differential wheel 23, an interlocking arm portion 41 that is disposed on the outer peripheral portion of the cam wheel 37 of the restriction release wheel 34, A spring portion 42 that elastically contacts the distal end portion 40 a of the regulating arm portion 40 between the tooth portions 27 a of the second differential gear 27 and elastically contacts the distal end portion of the interlocking arm portion 41 to the outer peripheral portion of the cam wheel 37 is provided. The restriction release wheel 34 includes a cam wheel 37 having a cam projection 37a provided on the outer peripheral portion. Therefore, when the restriction release wheel 34 makes one rotation, the restriction wheel portion of the restriction lever 33 is moved by the cam wheel 37. The front end portion 40a of the 40 can be reliably separated from the second differential gear 27, and thereby the restriction on the second differential gear 27 can be reliably and satisfactorily released.

  That is, when the regulation release wheel 34 makes one rotation with the cam wheel 37, the regulation lever 33 rotates by the cam arm 37 being pushed by the interlocking arm part 41 to resist the regulation arm part 40 against the spring force of the spring part 42. As a result, the tip 40a of the restricting arm 40 can be detached from the second differential gear 27, so that the restriction on the second differential gear 27 can be reliably and quickly released.

  In this case, the restriction lever 33 restricts the rotation of the second differential gear 27 by inserting the distal end portion 40a of the restriction arm portion 40 between the tooth portions 27a of the second differential gear 27. The rotation of the feed wheel 24 can be reliably regulated by the differential gear 27, and the rotation of the display wheel 4 can also be reliably regulated by the feed wheel 24. Thereby, since the play in the rotation direction of the display wheel 4 can be prevented, the display of the display wheel 4 can be always maintained in a stable state.

  Further, in the display switching device 21, the fourth and fifth intermediate wheels 19 and 20 are rotated in accordance with the rotation of the hour hand wheel 18 which is rotated by the rotation of the second step motor 14 which is a driving source, The first differential gear 26 of the differential wheel 23 is rotated by the rotation of the fourth and fifth intermediate wheels 19 and 20, or is dedicated for rotating the first differential gear 26 of the differential wheel 23. The second drive motor 14 for rotating the hour hand wheel 18 can be used in combination without the need for a drive source, thereby simplifying the drive source and reducing the cost. it can.

  Further, in this display switching device 21, the restriction release wheel 34 is rotated via the sixth intermediate wheel 35 in accordance with the rotation of the hour hand wheel 18 that is rotated by the rotation of the second step motor 14 that is a drive source. Therefore, a dedicated drive source for rotating the regulation release wheel 34 is not required, and the second step motor 14 for rotating the hour hand wheel 18 can also be used, thereby simplifying the drive source. In addition, the cost can be reduced.

  In the above-described embodiment, the case where the first and second differential gears 26 and 27 are made of metal having magnetism has been described. However, the present invention is not limited to this, and the first and second differential gears. 26 and 27 may be made of synthetic resin, and the first and second differential gears 26 and 27 may be embedded in the first and second magnets, respectively. A configuration in which a material is contained and the first and second magnets are magnetized may be used.

  In the above-described embodiment, the case where the present invention is applied to a wristwatch having the first drive system 5 and the second drive system 6 has been described. However, the first and second drive systems 5 and 6 are necessarily provided. It can also be applied to a wristwatch having only one drive system.

  Furthermore, in the above-described embodiments, the case where the present invention is applied to a pointer-type wristwatch has been described. However, the present invention is not necessarily a wristwatch. be able to. Further, the present invention can be widely applied not only to the timepiece but also to various devices such as a calendar device and a meter meter.

As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 is a transmission wheel that rotates by transmitting the rotation of the drive source, a differential wheel that rotates by the rotation of the transmission wheel, a feed wheel that rotates intermittently by the rotation of the differential wheel, A display switching device comprising a display wheel that rotates by rotation of the feed wheel and the display is switched, and a regulating member that removably regulates the rotation of the differential wheel,
The differential wheel meshes with the transmission wheel and rotates, and is provided rotatably on the same axis as the first differential gear. The differential wheel meshes with the feed wheel and rotates, and the restriction member. And a rotational force applied to the second differential gear as a rotational force by a positional shift caused by the rotation of the first differential gear with respect to the second differential gear. A display switching device comprising an imparting member.

  According to a second aspect of the present invention, in the display switching device according to the first aspect, the rotational force applying member includes a first magnet portion magnetized on the first differential gear, and the second differential gear. The display switching device is characterized in that a magnetic pole of the first magnet portion and a magnetic pole of the second magnet portion attract each other.

  According to a third aspect of the present invention, in the display switching device according to the first or second aspect, the restriction member includes a restriction lever that restricts rotation of the second differential gear of the differential wheel, and the first switch. 2. A display switching device comprising a restriction release wheel for releasing restriction by the restriction lever with respect to two differential gears.

  According to a fourth aspect of the present invention, in the display switching device according to any one of the first to third aspects, the transmission wheel is rotated along with the rotation of the pointer wheel that rotates by transmitting the rotation of the drive source. A display switching device characterized by rotating.

  According to a fifth aspect of the present invention, in the display switching device according to the third or fourth aspect of the invention, the regulation release wheel rotates in accordance with the rotation of the pointer wheel that rotates by transmitting the rotation of the drive source. This is a display switching device.

  According to a fifth aspect of the present invention, there is provided an electronic device characterized in that the display switching device according to the first aspect is provided in a device case.

1 second hand 2 minute hand 3 hour hand 4 display wheel 5 first drive system 6 second drive system 14 second step motor 18 hour hand wheel 19, 20 fourth and fifth intermediate wheels 21 display switching device 23 differential wheel 24 feed wheel 25 Restricting member 26 First differential gear 27 Second differential gear 28 Rotating force applying member 30 Dial 31 First magnet portion 32 Second magnet portion 33 Restricting lever 34 Restriction release wheel 37 Cam wheel 40 Restricting arm portion 41 Interlocking arm portion 42 Spring

Claims (6)

A transmission wheel that rotates by transmitting the rotation of the drive source, a differential wheel that rotates by the rotation of the transmission wheel, a feed wheel that rotates intermittently by the rotation of the differential wheel, and a rotation that rotates by the rotation of the feed wheel A display switching device comprising: a display wheel for switching display; and a restricting member for releasably restricting rotation of the differential wheel,
The differential wheel meshes with the transmission wheel and rotates, and is provided rotatably on the same axis as the first differential gear. And a rotational force applied to the second differential gear as a rotational force by a positional shift caused by the rotation of the first differential gear with respect to the second differential gear. A display switching device comprising: an imparting member.   2. The display switching device according to claim 1, wherein the rotational force applying member includes a first magnet unit magnetized in the first differential gear and a second magnet unit magnetized in the second differential gear. 3. And the magnetic pole of the first magnet part and the magnetic pole of the second magnet part attract each other.   3. The display switching device according to claim 1, wherein the restriction member includes a restriction lever that restricts rotation of the second differential gear of the differential wheel, and the restriction lever with respect to the second differential gear. A display switching device comprising: a deregulation vehicle for deregulating.   The display switching device according to any one of claims 1 to 3, wherein the transmission wheel is rotated in accordance with rotation of a pointer wheel that is rotated by transmission of rotation of the drive source. apparatus.   5. The display switching device according to claim 3, wherein the regulation release vehicle rotates in accordance with the rotation of the pointer wheel that is rotated by transmission of rotation of the drive source. . An electronic device comprising the display switching device according to claim 1 in a device case.

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