JP2017125745A - Jumper mechanism, movement, and timepiece - Google Patents

Abstract

A jumper mechanism, a movement, and a timepiece capable of suppressing excessive rotation of a gear by an external force while suppressing a decrease in durability.
A leap control portion 54 that swings around a swing axis O3 and engages / disengages from a date star wheel 34 that rotates around a central axis O1 to control the rotation of the date star wheel 34, and a swing shaft O3. A claw portion 55 that swings integrally with the leap control portion 54 and is capable of contacting the star wheel 34, and one of the leap control portion 54 and the claw portion 55 approaches the day star wheel 34. Sometimes, the other is separated from the date star wheel 34.
[Selection] Figure 3

Description

  The present invention relates to a jumper mechanism, a movement, and a timepiece.

  2. Description of the Related Art Conventionally, a timepiece having a calendar mechanism that displays calendar information related to a calendar (for example, month, day, day of the week, etc.) with hands (calendar hands) is known (see, for example, Patent Documents 1 and 2 below). This type of calendar mechanism includes, for example, a date star wheel with a date hand attached to indicate the date, a date turning wheel that rotates the date star wheel, and a date jumper that controls the rotation of the date star wheel. Yes.

The date jumper is configured to be swingable in a direction approaching and separating from the date star wheel. The day jumper is biased toward the day star by a jumper spring.
According to this configuration, when the date star wheel is rotated by the rotation of the date indicator driving wheel, the date jumper is pushed out to the tooth portion of the date star wheel, so that it swings in the direction against the urging force of the jumper spring. Thereby, the engagement between the date jumper and the date star wheel is released. After that, when the date jumper gets over the teeth of the date star wheel, it swings toward the date star wheel by the urging force of the jumper spring. Thereby, the date jumper is again engaged with the date star wheel. As a result, the date hand rotates one day by rotating the date star wheel by one tooth.

Japanese Utility Model Publication No. 63-187089 Japanese Utility Model Publication No. 63-10383

  By the way, in the above-described prior art, when an external force such as a drop impact is applied to the timepiece, there is a possibility that the Sun-star wheel rotates unexpectedly. Specifically, when the moment around the rotation center of the date star wheel exceeds the urging force of the jumper spring, the engagement between the date jumper and the date star wheel is released. In particular, a large date hand is used in a so-called center date system in which the date hand is provided coaxially with a time hand (hour hand, minute hand, second hand, etc.) indicating time information. For this reason, the date star wheel easily rotates excessively (for example, two teeth or more) due to the inertia of the date hands. As a result, there is a possibility that a so-called needle jump occurs in which the date hand rotates for, for example, two days or more. In this case, there are problems such as discomfort to the user and complicated date correction operation.

  It is conceivable to increase the biasing force of the jumper spring with respect to the above-mentioned problem. However, in this case, a large load is applied to the date jumper, the date star wheel, etc., which may lead to a decrease in durability.

  The present invention has been made in view of such circumstances, and its purpose is to provide a jumper mechanism, a movement, and a timepiece capable of suppressing excessive rotation of a gear by an external force while suppressing a decrease in durability. Is to provide.

  In order to solve the above-described problem, a jumper mechanism according to an aspect of the present invention oscillates around a first axis and engages / disengages with a gear that rotates around a second axis to dramatically control the rotation of the gear. And a claw portion that swings integrally with the jumping portion around the first axis and is capable of contacting the gear, and one of the jumping portion and the claw portion is the gear. When approaching, the other is separated from the gear.

In this aspect, when the gear rotates, the jump control portion is pushed up in the direction away from the gear by the gear tooth portion. As a result, the leap control portion swings from a calm position where the gear is engaged to restrict the rotation of the gear to a release position where the engagement with the gear is released and the rotation of the gear is allowed. By repeating the above-described operation, the jump control unit dramatically controls the rotation of the gear.
Here, when the gear rotates unexpectedly due to the influence of an external force, the jumping control unit may be largely pushed out of the gear. In this case, the gear tends to rotate excessively (for example, by one tooth or more) before the jump control unit returns from the release position to the calm position.
Therefore, according to this aspect, when one of the jumping part and the claw part approaches the gear, the other part is separated from the gear, and accordingly, the claw part according to the distance that the jumping part is separated from the gear. Approaches the gear. Therefore, when the gear rotates unexpectedly due to the external force and the jumping portion is largely pushed out of the gear, the claw portion can be brought into contact with the gear. Thereby, it can suppress that a gearwheel rotates excessively (for example, 2 teeth or more).
Moreover, in order to prevent the jump control portion from being largely pushed out of the gear by an external force, it is possible to suppress an increase in the load applied to the jumper mechanism and the gear compared to, for example, a configuration in which the urging force of the jumper spring is increased. Thereby, it can suppress that a gear rotates excessively, maintaining durability.

In the above aspect, the claw portion may come into contact with the gear when the jumping portion moves in a radial direction perpendicular to the second axis and more radially outward than the outermost peripheral portion of the gear.
According to this aspect, it is possible to suppress contact between the claw portion and the tooth portion during a normal calendar feeding operation. Thereby, it is possible to prevent a load from being applied between the claw portion and the gear during the calendar feeding operation. As a result, the gear can be rotated smoothly and a decrease in the durability of the claw portion and the gear can be suppressed.

The said aspect WHEREIN: The said nail | claw part may be formed so that it can approach between the adjacent tooth parts in the said gearwheel.
According to this aspect, since the claw portion is formed so as to be able to enter between adjacent tooth portions (valley portions) in the gear, the claw portion and the tooth portion can be brought into contact with each other in the rotation direction of the gear. Thereby, excessive rotation of the gear can be reliably controlled.

The said aspect WHEREIN: The said nail | claw part may have a recessed part which can accommodate the tooth | gear part of the said gearwheel.
According to this aspect, since the tooth portion is accommodated in the concave portion of the claw portion, it is easy to stop the rotation of the gear at a predetermined position when the gear rotates unexpectedly. As a result, when the jumping portion returns to the calm position, the jumping portion can surely enter the trough portion of the gear.

The said aspect WHEREIN: The said nail | claw part may be formed in the taper shape which tapers as it goes to a front-end | tip part by the planar view seen from the axial direction of the said 1st axis | shaft.
According to this aspect, since the claw portion is formed in a tapered shape that tapers toward the tip portion, the claw portion easily enters the trough portion of the gear. Thereby, when a gear tries to rotate excessively, a nail | claw part and the tooth part of a gear can be made to contact reliably.
Further, since the tooth portion can easily slide on the inclined surface of the claw portion, the claw portion can be pushed away from the gear by rotation of the gear. As a result, it is possible to quickly return the jumping portion to the calm position.

The said aspect WHEREIN: You may provide the jumper spring which urges | biases the said jump control part toward the said gearwheel.
According to this aspect, since the jump control portion is biased toward the gear by the jumper spring, even if the jump control portion is pushed out to the release position by the gear, it can be quickly returned to the calm position. Thereby, it can suppress that a gear rotates excessively.

A movement according to one aspect of the present invention includes the jumper mechanism according to the above aspect.
A timepiece according to one aspect of the present invention includes the movement according to the above aspect.
According to this configuration, it is possible to provide a movement and a watch having excellent operability and reliability.

  According to one aspect of the present invention, it is possible to suppress excessive rotation of a gear while suppressing a decrease in durability.

1 is an external view of a timepiece according to an embodiment. It is a top view of the movement concerning an embodiment. It is a top view of the calendar mechanism which concerns on embodiment. It is operation | movement explanatory drawing for demonstrating the date feeding operation | movement of the calendar mechanism which concerns on embodiment. It is operation | movement explanatory drawing for demonstrating the date feeding operation | movement of the calendar mechanism which concerns on embodiment. It is operation | movement explanatory drawing for demonstrating the needle jump suppression operation | movement of the calendar mechanism which concerns on embodiment. It is operation | movement explanatory drawing for demonstrating the needle jump suppression operation | movement of the calendar mechanism which concerns on embodiment. It is a top view of the calendar mechanism which concerns on the modification of embodiment. It is a top view of the calendar mechanism which concerns on the modification of embodiment.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
[clock]
FIG. 1 is an external view of the timepiece 1. In each of the drawings shown below, in order to make the drawing easy to see, some of the timepiece parts are not shown, and the timepiece parts are simplified.
As shown in FIG. 1, the timepiece 1 of the present embodiment is configured by incorporating a movement 10 (see FIG. 2), a dial plate 2, various hands 3 to 6 and the like in a timepiece case 7.

  On the dial 2, a time display unit 8 indicating information related to the time and a date display unit 9 indicating information related to the day are attached. In the present embodiment, the date display unit 9 is configured with numerals “1” to “31” attached to the outer peripheral side of the time display unit 8 in the dial 2. The date display unit 9 is not limited to numbers and may be a scale or the like.

  The various hands 3 to 6 are a time hand (hour hand 3, minute hand 4 and second hand 5) indicating the time display unit 8 and a date hand 6 indicating the date display unit 9. These hands 3 to 6 are configured to be rotatable around the central axis O1 (second axis) of the movement 10. That is, the timepiece 1 of the present embodiment is a so-called center date system in which various hands 3 to 6 are rotated on the same axis.

  The watch case 7 includes a case main body 11, a case lid (not shown), and a cover glass 12. Of the side surface of the case body 11, a crown 15 is provided at a portion (right side in FIG. 1) located at 3 o'clock. The crown 15 is for operating the movement 10 from the outside of the case body 11. The crown 15 is integrated with a winding stem 16 inserted into the case main body 11.

[Movement]
FIG. 2 is a plan view of the movement 10. In the following description, the cover glass 12 side (the dial plate 2 side) of the watch case 7 with respect to the base plate 21 constituting the substrate of the movement 10 is referred to as the “back side” of the movement 10, and the case lid side (the dial plate 4). The side opposite to the side) is referred to as the “front side” of the movement 10.
As shown in FIG. 2, the movement 10 has a main plate 21. The above-described winding stem 16 shown in FIG. 1 is incorporated in a winding stem guide hole (not shown) of the main plate 21. The winding stem 16 is used to correct the date and time. The winding stem 16 is rotatable about its axis and movable in the axial direction. The leading end of the winding stem 16 (the end opposite to the crown 15 side) is linked to the movement 10.

On the front side of the main plate 21, a front wheel train 22, an escapement speed governor (not shown) that controls the rotation of the front wheel train 22, and the like are incorporated. The front wheel train 22 includes a barrel wheel 23, a second wheel, a third wheel, and a fourth wheel (all not shown).
Of the front wheel train 22, the second hand 3 described above is attached to the fourth wheel. A minute hand 4 is attached to the center wheel & pinion. Further, the hour hand 5 described above is attached to the hour wheel 25 that rotates with the rotation of the center wheel & pinion. The fourth wheel, the second wheel, and the hour wheel 25 are coaxially disposed on the central axis O1 of the movement 10.

<Calendar mechanism>
A calendar mechanism 31 is incorporated on the back side of the main plate 21. The calendar mechanism 31 includes a date turning intermediate wheel 32, a date turning wheel 33, a date star wheel 34, a date jumper 35, a date jumper spring 36, and the like. Of the calendar mechanism 31, the date jumper 35 and the date jumper spring 36 constitute the jumper mechanism of this embodiment. Note that reference numeral 41 in FIG. 2 is a calendar correction train wheel for correcting the date, and reference numeral 42 is a day correction train wheel for correcting the day of the week.

  The intermediate date driving wheel 32 is fixed to the hour wheel 25 by press fitting or the like. That is, the date driving intermediate wheel 32 is configured to be rotatable integrally with the hour wheel 25 in a clockwise direction around the central axis O1 (hereinafter referred to as CW direction). In this case, the date driving intermediate wheel 32 rotates once in 12 hours.

The date driving wheel 33 is configured to be rotatable in a counterclockwise direction (hereinafter referred to as a CCW direction) around a rotation axis O2 parallel to the central axis O1. Specifically, the date driving wheel 33 includes a date driving gear portion 44 and a date feeding claw 45.
The date turning gear portion 44 meshes with the date turning intermediate wheel 32 described above. The number of teeth of the date driving gear portion 44 is set so that the date driving wheel 33 rotates once in 24 hours.
The date feeding claw 45 is configured to be able to engage with the tooth portion 51 of the date star wheel 34. The date feeding claw 45 rotates the date star wheel 34 once a day (at 0:00 am) for one day (one tooth).

FIG. 3 is a plan view of the calendar mechanism 31.
As shown in FIG. 3, the date star wheel 34 is arranged coaxially with the central axis O1. The date star wheel 34 is configured to be rotatable relative to the hour wheel 25 and the date indicator driving intermediate wheel 32 in the CW direction around the central axis O1. The above-described date hand 6 (see FIG. 1) is attached to a portion of the date star wheel 34 that is located behind the dial 2.
The star wheel 34 has 31 tooth portions 51. The tooth part 51 is configured to be able to engage with the above-mentioned date feeding claw 45. The day star wheel 34 is fed by one tooth per day by the date feeding claw 45 of the date indicator driving wheel 33 as described above. Thereby, the date star wheel 34 rotates once in 31 days.

  The date jumper 35 is configured to be swingable about a swing axis O3 disposed in parallel with the central axis O1. The date jumper 35 includes a jumper true 50 extending along the swing axis O3, a lever portion 53 fixed to the jumper true 50, and a jumping portion 54 and a claw portion 55 formed on the lever portion 53. ing. In the following description, a direction along the central axis O1 may be simply referred to as an axial direction, a direction around the central axis O1 may be referred to as a circumferential direction, and a direction orthogonal to the central axis O1 may be referred to as a radial direction.

  The lever portion 53 is formed in a V shape that spreads toward the central axis O1 in a plan view viewed from the axial direction. The lever portion 53 includes a base portion 61 fixed to the jumper true 50, and a first arm 62 and a second arm 63 extending in a bifurcated manner from the base portion 61. Each of the arms 62 and 63 extends in a direction away from each other toward the distal end portion in plan view. In the example of FIG. 3, the width of the first arm 62 is thicker than the width of the second arm 63. In the example of FIG. 3, the lengths of the arms 62 and 63 are the same, but are not limited thereto. Further, the lever portion 53 may be configured to swing relative to the jumper true 50.

  The jump control portion 54 protrudes from the distal end portion of the first arm 62 toward the central axis O1. The jumping portion 54 is formed in a triangular shape (tapered shape) whose width gradually decreases toward the central axis O1 in plan view. That is, the jumping control unit 54 has a back side inclined surface 54a located on the back side in the CW direction of the date star wheel with respect to the apex, a front side inclined surface 54b in the CW direction of the date star wheel 34 with respect to the apex, have. The leading portion of the jumping portion 54 can enter between adjacent tooth portions 51 (valley portion 52) of the star wheel 34.

  As the date jumper 35 swings, the leap control portion 54 engages and disengages with the tooth portion 51 of the above-described date star wheel 34 to greatly control the rotation of the date star wheel 34. Specifically, when the date jumper 35 swings in the CW direction around the swing axis O <b> 3, the jumping portion 54 enters the valley 52 in the date star wheel 34 and moves to the tooth portion 51 in the circumferential direction (day star wheel). 34 in the direction of rotation). Thereby, the leap control part 54 controls rotation of the date star wheel 34 (settlement position). On the other hand, when the date jumper 35 swings in the CCW direction around the swing axis O <b> 3, the jumping portion 54 retreats from the valley portion 52 of the date star wheel 34 and engages the jumping portion 54 and the tooth portion 51. Is released. Thereby, the leap control part 54 accept | permits rotation of the date star wheel 34 (release position).

  The claw portion 55 projects from the distal end portion of the second arm 63 toward the central axis O1. The claw portion is formed in a triangular shape (tapered shape) whose width gradually decreases toward the central axis O1 in plan view. The claw portion 55 is configured such that a tip portion thereof can enter the valley portion 52 of the star wheel 34. That is, the claw portion 55 has a back side inclined surface 55a positioned on the back side in the CW direction of the date star wheel 34 with respect to the apex, and a front side inclined surface 55b in the CW direction of the date star wheel 34 with respect to the apex, have.

  The claw portion 55 can be engaged with the tooth portion 51 of the date star wheel 34 as the date jumper 35 swings. Specifically, when the date jumper 35 swings in the CCW direction around the swing axis O <b> 3, the sun jumper 35 enters the valley 52 in the date star wheel 34 and engages the tooth portion 51 in the circumferential direction. Thereby, the claw portion 55 regulates the rotation of the date star wheel 34. On the other hand, when the date jumper 35 swings in the CW direction around the swing axis O3, the claw portion 55 is retracted from the valley portion 52 of the date star wheel 34 and the engagement between the claw portion 55 and the tooth portion 51 is released. Is done. Accordingly, the claw portion 55 allows the date star wheel 34 to rotate.

  As described above, in the date jumper 35 of the present embodiment, the jumping portion 54 and the claw portion 55 are integrally formed at portions of the lever portion 53 that are located on both sides of the swing shaft O3. Therefore, when one of the jumping portion 54 and the claw portion 55 approaches the central axis O1, the swinging portion 54 and the claw portion 55 swing together so that the other is separated from the central axis O1. In this case, the claw portion 55 is located on the outer side in the radial direction from the outermost peripheral portion of the date star wheel 34 when the jumping portion 54 is in the calm position, and the engagement between the claw portion 55 and the tooth portion 51 is performed. It has been released. On the other hand, the claw portion 55 moves the apex of the jump control portion 54 in the CCW direction around the swing axis O3 of the date jumper 35 to the outside in the radial direction from the outermost peripheral portion of the date star wheel 34 (outside the release position). Is set so as to come into contact with the tooth portion 51. The outermost peripheral portion of the date star wheel 34 is a radial position at the apex of the tooth portion 51.

  As shown in FIG. 2, the date jumper spring 36 is configured to be elastically deformable in an in-plane direction perpendicular to the swing axis O3. Specifically, the base end portion of the date jumper spring 36 is fixed to the main plate 21. On the other hand, the tip of the date jumper spring 36 is a free end. The front end portion of the date jumper spring 36 is in contact with the first arm 62 from the side opposite to the central axis O1 with the date jumper 35 interposed therebetween. The date jumper spring 36 urges the date jumper 35 in the CW direction around the swing axis O3. If the date jumper spring 36 is configured to urge the date jumper 35 in the CW direction around the swing axis O3, the contact position with the date jumper 35 can be changed as appropriate. In this case, for example, the second arm 63 may be urged away from the central axis O1.

[Calendar mechanism operation method]
Next, an operation method of the calendar mechanism 31 described above will be described.
First, a normal daily feeding operation will be described. In the following description, the initial state is described when the jumping portion 54 is in the calm position. That is, in the initial state, the leap control portion 54 enters the valley portion 52 of the date star wheel 34 and the inclined surfaces 54 a and 54 b engage with the tooth portion 51, thereby restricting the rotation of the date star wheel 34. Has been. A chain line L in the figure indicates a reference position in the circumferential direction in the initial state.
As shown in FIG. 2, in the timepiece 1 of the present embodiment, the rotational force of the barrel complete 23 is transmitted to the hour wheel 25 via the front wheel train 22. The rotational force transmitted to the hour wheel 25 is transmitted to the date indicator driving wheel 33 (the date indicator gear portion 44) via the date indicator driving intermediate wheel 32. Thereby, the date driving wheel 33 rotates once in 24 hours in the CCW direction around the rotation axis O2.

  As the date indicator driving wheel 33 rotates, the date feeding claw 45 of the date indicator driving wheel 33 approaches the tooth portion 51 of the date star wheel 34. Thereafter, at the timing of midnight, the date feeding finger 45 engages with the tooth portion 51 of the date star wheel 34 and rotates the date star wheel 34 by one tooth in the CW direction around the central axis O1.

4 and 5 are operation explanatory views for explaining the date feeding operation of the calendar mechanism 31. FIG.
As shown in FIGS. 3 and 4, when the date star wheel 34 starts to rotate in the CW direction, the tooth portion 51 of the date star wheel 34 comes into sliding contact with the front side inclined surface 54 b of the jump control portion 54. As a result, the jumping portion 54 moves outward in the radial direction (a direction away from the central axis O1). That is, the jumping portion 54 is pushed up against the urging force of the date jumper spring 36 by the tooth portion 51 of the date star wheel 34, so that the date jumper 35 swings in the CCW direction. As a result, as shown in FIG. 4, the jumping portion 54 moves to a release position where the engagement between the jumping portion 54 and the tooth portion 51 is released. In the present embodiment, the apexes of the jumping portion 54 and the tooth portion 51 are in contact with each other at the release position. On the other hand, in the released state, the claw portion 55 has entered the valley portion 52 of the date star wheel 34, but a gap is provided between the claw portion 55 and the tooth portion 51. That is, the claw portion 55 and the tooth portion 51 are not in contact with each other in the released state.

  As shown in FIG. 5, when the star wheel 34 further rotates in the CW direction, the apex of the jump control portion 54 gets over the apex of the tooth portion 51. Then, the date jumper 35 swings in the CW direction by the urging force of the jumper spring 36. Specifically, the jumping portion 54 of the date jumper 35 moves toward the inside in the radial direction (direction approaching the central axis O1) while the back side inclined surface 54a is in sliding contact with the tooth portion 51. As a result, the jump control unit 54 returns to the calm position again while pushing the day star wheel 34 toward the CW direction. And the date hand 6 rotates one day because the date star wheel 34 rotates one tooth. Thus, the date feeding operation is completed.

Next, a description will be given of the needle skipping suppression operation when an external force such as a drop impact is applied to the timepiece 1. FIG. 6 is an operation explanatory diagram for explaining the needle jump suppression operation of the calendar mechanism 31.
As shown in FIGS. 3 and 6, when an external force acts on the timepiece 1, for example, the date star wheel 34 may rotate in the CW direction due to the inertia of the date hand 6. In this case, similarly to the above-described date feeding operation, the jumping portion 54 moves to the release position by the date jumper 35 swinging in the CCW direction. In this state, the date star wheel 34 tries to further rotate (for example, one tooth or more) in the CW direction before the date jumper 35 returns to the calm position. Thereby, as shown in FIG. 6, the apex of the jumping portion 54 is separated from the apex of the tooth portion 51.

  Here, in the present embodiment, the claw portion 55 enters the valley portion 52 of the date star wheel 34 at the release position. Therefore, if the date star wheel 34 tries to rotate in the CW direction before the date jumper 35 returns to the settled position, the tooth portion 51 contacts the front side inclined surface 55b of the claw portion 55 in the circumferential direction. Thereby, the further rotation (for example, 1 tooth or more) to the CW direction of the date star wheel 34 is controlled. Thereafter, the date jumper 35 swings in the CW direction by the urging force of the date jumper spring 36. Thereby, the claw part 55 retracts | saves from the trough part 52 of the date star wheel 34 similarly to the date feeding operation | movement mentioned above. Further, the jumping portion 54 enters the valley portion 52 of the star wheel 34 and engages with the tooth portion 51. As a result, the jumping unit 54 becomes the above-described calm position.

FIG. 7 is an operation explanatory diagram for explaining the needle skipping suppressing operation of the calendar mechanism 31.
As shown in FIG. 7, even when the date star wheel 34 is about to rotate in the CCW direction by an external force, excessive rotation of the date star wheel 34 is suppressed by the same operation as the above-described needle jump suppression operation. Is done. That is, when the date star wheel 34 rotates in the CCW direction, the date jumper 35 is brought into sliding position by the tooth portion 51 of the date star wheel 34 coming into sliding contact with the rear side inclined surface 54a of the jump control portion 54. Move to. In this state, the claw portion 55 has entered the valley portion 52 of the date star wheel 34. Therefore, when the date star wheel 34 tries to further rotate in the CCW direction, the back side inclined surface 55a of the claw portion 55 and the tooth portion 51 come into contact with each other. Thereby, the further rotation of the date star wheel 34 is controlled. Thereafter, the date jumper 35 swings in the CW direction by the urging force of the date jumper spring 36 so that the claw portion 55 is retracted from the valley portion 52 of the date star wheel 34 and the jumping portion 54 is in the above-described settled position. It becomes.

As described above, in the present embodiment, the claw portion 55 that swings integrally with the jump control portion 54 around the swing axis O3 and can come into contact with the star wheel 34 is provided. When either one approaches the central axis O1, the other swings away from the central axis O1.
According to this configuration, the claw portion 55 approaches the central axis O1 in accordance with the distance that the jump control portion 54 is separated from the central axis O1. Therefore, when the date star wheel 34 rotates unexpectedly due to the external force and the jump control portion 54 is largely pushed out of the date star wheel 34, the claw portion 55 can be brought into contact with the date star wheel 34. Thereby, it can suppress that the date star wheel 34 rotates excessively (for example, 2 teeth or more), and the needle jump of the date hand 6 can be suppressed within one day.
In addition, the load applied to the date jumper 35 and the date star wheel 34 is increased as compared with the configuration in which the urging force of the date jumper spring 36 is increased in order to suppress the leap control portion 54 from moving to the release position by an external force. Can be suppressed. Thereby, it is possible to suppress the date star wheel 34 from rotating excessively while maintaining durability.

In the present embodiment, the claw portion 55 and the tooth portion 51 come into contact with each other when the apex of the jumping portion 54 moves outward in the radial direction from the outermost peripheral portion of the date star wheel 34 in the CCW direction of the date jumper 35. The configuration is set to
According to this structure, it can suppress that the nail | claw part 55 and the tooth | gear part 51 contact at the time of a normal date feeding operation | movement. Thereby, it is possible to prevent a load from being applied between the claw portion 55 and the date star wheel 34 during the date feeding operation. As a result, the date star wheel 34 can be smoothly rotated, and a decrease in the durability of the claw portion 55 and the date star wheel 34 can be suppressed.

  In the present embodiment, since the claw portion 55 is formed so as to be able to enter the valley portion 52 of the date star wheel 34, the claw portion 55 and the tooth portion 51 are brought into contact with each other in the rotation direction (circumferential direction) of the date star wheel 34. be able to. Thereby, the excessive rotation of the date star wheel 34 can be regulated reliably.

In the present embodiment, since the claw portion 55 is formed in a tapered shape that tapers toward the tip portion, the claw portion 55 can easily enter the valley portion 52 of the date star wheel 34. Thereby, when the date star wheel 34 tries to rotate excessively, the claw portion 55 and the tooth portion 51 of the date star wheel 34 can be reliably brought into contact with each other.
Further, since the tooth portion 51 can easily come into sliding contact with the inclined surfaces 55a and 55b of the claw portion 55, the claw portion 55 can be pushed outward in the radial direction by the rotation of the date star wheel 34. Thereby, the jump control part 54 can be promptly returned to the calm position.

  In the present embodiment, since the jumping portion 54 is biased toward the date star wheel 34 (central axis O1) by the date jumper spring 36, the jumping portion 54 is pushed out to the release position by the date star wheel 34. However, it is possible to quickly return to the calm position. Thereby, it can suppress that the date star wheel 34 rotates excessively.

  And since the movement 10 and timepiece 1 of this embodiment are provided with the structure mentioned above, the movement 10 and timepiece 1 excellent in operativity and reliability can be provided.

(Modification)
Next, a modification of this embodiment will be described. In the embodiment described above, the case where the claw portion 55 is formed in a triangular shape has been described. However, the shape is not limited to this, and the shape of the claw portion can be changed as appropriate. In the following description, the same components as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

FIG. 8 is a plan view of a calendar mechanism 31 according to a modification.
For example, like the date jumper 101 shown in FIG. 8, the claw portion 110 may be formed in a trapezoidal shape in plan view. Specifically, the claw portion 110 includes a back side inclined surface 110a and a front side inclined surface 110b, and a connection surface 110c that connects the inclined surfaces 110a and 110b. The entire claw portion 110 is formed in a size that allows entry into the valley 52 of the date star wheel 34.
According to this structure, since the whole nail | claw part 110 will approach into the trough part 52, the clearance gap between the nail | claw part 110 and the adjacent tooth part 51 can be made small. Thereby, when the date star wheel 34 rotates unexpectedly, it becomes easy to stop the rotation of the date star wheel 34 at a predetermined position. As a result, when the jumping portion 54 returns to the calm position, the jumping portion 54 can be surely entered into the valley portion 52 of the date star wheel 34.

FIG. 9 is a plan view of a calendar mechanism 31 according to a modification.
The claw portion 121 of the date jumper 120 shown in FIG. 9 has a recess 121 a that can accommodate the tooth portion 51 of the date star wheel 34. The recess 121a is recessed from the distal end surface of the claw 121 to the outside in the radial direction. The inner surface shape of the recess 121 a in plan view is formed corresponding to the outer surface shape of the tooth portion 51.
According to this configuration, the tooth portion 51 is accommodated in the concave portion 121a of the claw portion 121, so that it becomes easy to stop the rotation of the date star wheel 34 at a predetermined position when the date star wheel 34 rotates unexpectedly. . As a result, when the jumping portion 54 returns to the calm position, the jumping portion 54 can be surely entered into the valley portion 52 of the date star wheel 34.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the present invention is applied to the mechanical timepiece 1 has been described. However, the present invention is not limited thereto, and the present invention may be applied to an analog quartz timepiece.
In the embodiment described above, the case where the present invention is applied to a jumper mechanism that performs a date feeding operation has been described. However, the present invention is not limited to this, and the present invention is applied to a jumper mechanism that performs other calendar feeding operations such as days of the week and months. It doesn't matter.
In the embodiment described above, the case where the jumper mechanism of the present invention is applied to the center date type timepiece 1 has been described. However, the present invention is not limited to this. For example, the date hand 6 may be disposed at a position shifted from the central axis O1.

  In the above-described embodiment, the configuration in which the jump control portion 54 and the claw portion 55 are integrally formed via the lever portion 53 has been described. However, as long as the jump control portion 54 and the claw portion 55 are configured to swing integrally. The jumping portion 54 and the claw portion 55 may be formed separately.

In the above-described embodiment, the configuration in which the claw portion 55 is in contact with the tooth portion 51 of the date star wheel 34 in the circumferential direction has been described, but the configuration is not limited thereto. For example, the claw part 55 and the date star wheel 34 may be configured to contact each other in the radial direction.
In the above-described embodiment, the configuration in which the claw portion 55 and the tooth portion 51 come into contact with each other when the apex of the jump control portion 54 moves outward in the radial direction from the outermost peripheral portion of the date star wheel 34 has been described. Not limited to. For example, the claw portion 55 and the tooth portion 51 may be in contact with each other when the jumping portion 54 reaches the release position.

  In addition, in the range which does not deviate from the meaning of this invention, it is possible to replace suitably the component in the embodiment mentioned above by a known component, and you may combine each modification mentioned above suitably.

1 ... Clock 10 ... Movement 34 ... Sun star wheel (gear)
36 ... Japan jumper spring 51 ... Tooth part 54 ... Jump control part 55, 110, 121 ... Claw part

Claims (8)

A jumping portion that swings about the first axis and engages / disengages with a gear that rotates about the second axis,
A claw portion that swings integrally with the jump control portion around the first axis and that can contact the gear;
The jumper mechanism characterized in that when one of the jump control portion and the claw portion approaches the gear, the other is separated from the gear.   2. The claw portion is in contact with the gear when the jumping portion moves in a radial direction perpendicular to the second axis and more radially outward than an outermost peripheral portion of the gear. Jumper mechanism described in 1.   The jumper mechanism according to claim 1, wherein the claw portion is formed so as to be able to enter between adjacent tooth portions in the gear.   The jumper mechanism according to claim 1, wherein the claw portion has a recess capable of accommodating a tooth portion of the gear.   The said nail | claw part is formed in the taper shape tapering off toward the front-end | tip part by the planar view seen from the axial direction of the said 1st axis | shaft, The any one of Claims 1-4 characterized by the above-mentioned. The jumper mechanism described.   The jumper mechanism according to any one of claims 1 to 5, further comprising a jumper spring that biases the jump control portion toward the gear.   A movement comprising the jumper mechanism according to any one of claims 1 to 6.   A timepiece comprising the movement according to claim 7.

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