JP7023124B2 - Movement and watches - Google Patents

Description

The present invention relates to movements and watches.

Conventionally, the movement of a mechanical timepiece is equipped with a barrel wheel containing a powered royal fern, a square hole wheel for winding the royal fern, and a hoisting wheel train for rotating the square hole wheel. The square hole wheel is engaged with a haze that regulates the reversal of the square hole wheel in order to prevent the unwinding of the wound royal fern. For example, Patent Document 1 describes a regulation lever that is made of a plate material and uses one end as a shaving.

Jitsukaisho 52-16172A Gazette

However, in the technique described in Patent Document 1, since the regulation lever is provided so as to straddle the square hole wheel in the radial direction, a space for arranging the control lever is required at a position overlapping with the square hole wheel. Therefore, the movement becomes larger in the thickness direction of the square hole wheel. Further, the technique described in Patent Document 1 requires a structure for maintaining the posture of the kohaze, so that the movement may become large in plan. Therefore, in the prior art, there is a problem of miniaturizing the movement and the timepiece provided with the movement.

Therefore, the present invention provides a movement and a timepiece that can be miniaturized.

The movement of the present invention has a square hole wheel that is rotatable around the first axis and is provided so that the sword can be wound up, and a claw portion that is rotatably provided around the second axis and meshes with the square hole wheel. The contact portion between the claw portion and the square hole wheel is located in the first rotation direction of the square hole wheel when the sword is wound up, rather than the center line of the kohaze and the square hole wheel. Located on the downstream side, the surface of the claw portion faces the downstream side in the first rotation direction at the contact portion, and the normal at the contact portion is the same as seen from the axial direction of the second axis. It is characterized by passing through the second axis .

According to the present invention, when the torque in the direction opposite to the first rotation direction acts on the square hole wheel due to the unwinding of the zenmai, the position on the downstream side in the first rotation direction from the center line of the kohaze and the square hole wheel. In, the square hole wheel contacts the claw portion of the kohaze from the downstream side in the first rotation direction. Therefore, the claw portion of the kohaze stretches the square hole wheel so as to restrict the rotation of the square hole wheel in the first rotation direction. This makes it possible to regulate the rotation of the square hole wheel while maintaining the posture of the claw portion without using other members. Therefore, even if the size of the claw portion is reduced, the kohaze can function as a member for restricting the rotation of the square hole wheel in the direction opposite to the first rotation direction. Therefore, it is possible to provide a movement that can be miniaturized as compared with the case where a part of the regulation lever as in the prior art is used as a knead.

Further, of the forces from the square hole wheel acting on the claws at the contact portion, the component force in the normal direction acts toward the second axis, so that the claws of the kohaze rotate around the second axis to make a corner. It is possible to suppress the deviation with respect to the hole wheel. Therefore, the square hole wheel is surely stretched by the claw portion of the kohaze, and the rotation of the square hole wheel in the direction opposite to the first rotation direction can be surely restricted.

In the above movement, it is desirable that the claw portion includes the contact portion and has a contact surface extending in an arc shape centered on the second axis when viewed from the axial direction of the second axis.

According to the present invention, regardless of the position of the contact surface of the claw portion of the square hole wheel, the component force in the normal direction among the forces acting on the claw portion is the second component. It acts toward the axis. Therefore, it is possible to tolerate the misalignment of the contact portion due to the misalignment of the relative positions of the kohaze and the square hole wheel.

In the above movement, a urging member that engages with the sword and urges the claw portion toward the square hole wheel is further provided, and the urging member is viewed from the axial direction of the second axis. It is desirable that at least a part of the nail is provided so as to overlap the claw.

According to the present invention, the space for arranging the kohaze and the urging member can be reduced as compared with the case where the entire urging member is provided side by side with the kohaze when viewed from the front and back directions. Therefore, the movement can be made smaller.

In the above movement, the urging member is a cantilever that engages with the sword at the tip, and the intermediate portion is provided at a position farther from the second axis than the proximal end and the tip portion. It is desirable to be there.

According to the present invention, it is possible to secure the length of the cantilever while suppressing the increase in the maximum outer diameter of the urging member with respect to the second axis. Therefore, it is possible to reduce the size of the urging member and improve the degree of freedom in designing the urging force of the urging member.

The timepiece of the present invention is characterized by having the above-mentioned movement.

According to the present invention, since the movement that can be miniaturized is provided, the timepiece can be miniaturized.

According to the present invention, it is possible to provide a movement and a timepiece that can be miniaturized.

It is an external view of the timepiece of an embodiment. It is a top view which looked at the movement of an embodiment from the front side. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. It is a top view which looked at the main part of the movement of an embodiment from the front side. It is sectional drawing in the VV line of FIG. It is a figure explaining the operation of the movement of an embodiment. It is a figure explaining the operation of the movement of an embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. Then, the duplicate description of those configurations may be omitted.

Generally, a mechanical body including a driving part of a watch is referred to as a "movement". The state in which the dial and hands are attached to this movement and put in the watch case to make a finished product is called "complete" of the watch. Of both sides of the main plate that constitutes the watch board, the side with the glass of the watch case (the side with the dial) is called the "back side" of the movement. Of both sides of the main plate, the side of the watch case with the case back cover (the side opposite to the dial) is referred to as the "front side" of the movement. In each of the vehicles described below, the front and back directions of the movement are provided as the rotation axis direction.

FIG. 1 is an external view of the clock of the embodiment.
As shown in FIG. 1, the complete watch 1 of the present embodiment has a movement 10 and a dial 4 having at least a scale indicating information about time in a watch case 3 including a case back cover and a glass 2 (not shown). And a pointer including an hour hand 5 indicating an hour, a minute hand 6 indicating a minute, and a second hand 7 indicating a second. The watch 1 is a so-called self-winding wristwatch, and is a power source of the watch 1 via a self-winding wheel train by rotating a rotary weight (not shown) by a user's movement (see FIG. 3). ) Is rolled up. Further, the watch 1 can be manually wound up with the royal fern 23, and by rotating the crown 8, the royal fern 23 is wound up via the manual winding wheel train.

FIG. 2 is a plan view of the movement of the embodiment as viewed from the front side. FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
As shown in FIGS. 2 and 3, the movement 10 is provided so that the main plate 11, the barrel holder 12 arranged on the front side of the main plate 11, the barrel wheel 20 containing the royal fern 23, and the royal fern 23 can be wound up. The square hole wheel 30 is provided, a kobako 40 having a claw portion 42 that meshes with the square hole wheel 30, and a kobako spring 50 (a urging member) that engages with the kobako 40. The movement 10 is provided with a barrel 20 including a barrel wheel 20, a front wheel train including a second wheel, a third wheel, a fourth wheel, etc. (not shown), and an escape / speed control mechanism including a balance wheel, an escape wheel, ankle, etc. However, a detailed explanation will be omitted.

As shown in FIG. 3, the barrel wheel 20 has a barrel 21, a barrel 22 attached to the barrel 21, and a royal fern 23 housed in the barrel 22. The barrel Shin 21 is rotatably supported around the first axis O by the main plate 11 and the barrel receiver 12. The barrel 22 is rotatably supported by the barrel 21. The inner end of the royal fern 23 is connected to the barrel 21. The outer end of the royal fern 23 is connected to the inner peripheral surface of the barrel 22. The Zenmai 23 is wound up by the rotation of the barrel Shin 21. The barrel 22 is rotated by the restoring force when the royal fern 23 is unwound to drive the front wheel train.

The square hole wheel 30 is arranged coaxially with the barrel wheel 20. The square hole wheel 30 is fixed to a portion of the barrel Shin 21 located between the barrel 22 and the barrel receiver 12. The square hole wheel 30 winds up the royal fern 23 housed in the barrel 22 by rotating integrally with the barrel 21 in the first rotation direction D1 (see FIG. 4) around the first axis O. A torque in the second rotation direction D2 opposite to the first rotation direction D1 acts on the square hole wheel 30 due to the restoring force when the zenmai 23 is unwound. Teeth 31 are formed on the outer peripheral portion of the square hole wheel 30. The square hole wheel 30 is meshed with a gear (for example, a round hole wheel) having a self-winding wheel train or a manual winding wheel train.

The kohaze 40 is arranged so as not to overlap the square hole wheel 30 when viewed from the front and back directions. The barrel 40 is rotatably supported around the second axis P by the barrel holder 12. Specifically, the kohaze 40 is extrapolated to a cylindrical support cylinder 13 erected on the front side from the barrel holder 12. The front end of the support cylinder 13 is formed to have a smaller diameter than the extrapolated portion of the support cylinder 13. A bush 14 is extrapolated to the front end of the support cylinder 13. The bush 14 is sandwiched between the stepped surface of the support cylinder 13 and the seat surface of the screw 15 screwed into the support cylinder 13 from the front side. A flange 14a projecting outward in the radial direction is provided at an end portion on the back side of the bush 14. The outer diameter of the flange 14a is formed to be larger than the extrapolated portion of the support cylinder 13 in which the kohaze 40 is extrapolated. The outer diameter of the portion of the bush 14 on the front side of the flange 14a is smaller than the outer diameter of the head of the screw 15. The barrel 40 is supported by the support cylinder 13 in a state including a vertical shaving between the barrel holder 12 and the flange 14a of the bush 14. The vertical agaki is a play in the thrust direction with respect to the axis.

FIG. 4 is a plan view of the main part of the movement of the embodiment as viewed from the front side.
As shown in FIG. 4, the kohaze 40 includes an annular base 41 extrapolated to the support cylinder 13 (see FIG. 3), a claw portion 42 extending from the base 41 in a direction orthogonal to the second axis P, and an operation portion. It includes a 43, an extrapolated lever 44, and a pin 45 provided on the extrapolated lever 44. The claw portion 42 extends toward the square hole wheel 30. The claw portion 42 is in contact with the square hole wheel 30 at the contact portion 60. The contact portion 60 between the claw portion 42 and the square hole wheel 30 is located downstream of the center line C of the kohaze 40 and the square hole wheel 30 in the first rotation direction D1. The center line C of the kohaze 40 and the square hole wheel 30 is a line segment connecting the center of the kohaze 40 (second axis P) and the center of the square hole wheel 30 (first axis line O) when viewed from the front and back directions. be.

The claw portion 42 has a tip surface 46 (contact surface) including the contact portion 60. The tip surface 46 of the claw portion 42 extends in an arc shape centered on the second axis P when viewed from the front and back directions. The tip surface 46 of the claw portion 42 faces the downstream side in the first rotation direction D1. The tooth surface 32 of the square hole wheel 30 is in contact with the tip surface 46 of the claw portion 42 from the downstream side in the first rotation direction D1. In the following description, among the circumferential directions around the second axis P, the direction in which the tip of the claw portion 42 approaches the center line C is referred to as an engagement direction.

The operation unit 43 is a lever-shaped portion that is operated when the kohaze 40 is manually rotated. The operation unit 43 is provided at a position different from that of the claw unit 42. In the present embodiment, the operation unit 43 is provided on the side opposite to the claw unit 42 with the second axis line P interposed therebetween. As shown in FIG. 2, the barrel receiving 12 is formed with an avoiding portion 12a formed so as to avoid the operating portion 43 at a position overlapping with the tip of the operating portion 43 when viewed from the front and back directions. In the present embodiment, the avoiding portion 12a is a through hole that penetrates the barrel receiving 12 in the front and back directions. The avoiding portion 12a is a space for avoiding contact between the tool for operating the operating portion 43 and the barrel receiving 12 when the kohaze 40 is manually rotated.

As shown in FIG. 4, the urging lever 44 is provided at a position different from that of the claw portion 42 and the operating portion 43. In the present embodiment, the urging lever 44 is provided between the operation portion 43 and the center line C on the side opposite to the claw portion 42 with the center line C interposed therebetween when viewed from the front and back directions.

FIG. 5 is a cross-sectional view taken along the line VV of FIG.
As shown in FIG. 5, the imposition lever 44 is formed with a pin insertion portion 44a into which the pin 45 is inserted. The pin insertion portion 44a is a hole that penetrates in the front and back directions.

The pin 45 is inserted into the pin insertion portion 44a from the front side and fixed to the urgency lever 44. The pin 45 is formed in a columnar shape extending in the front-back direction. At the front end of the pin 45, a flange portion 45a projecting outward in the radial direction is formed.

The kohaze spring 50 is arranged on the front side of the barrel holder 12. The kohaze spring 50 is a cantilever that urges the kohaze 40 in the engaging direction. The base end portion 51 of the kohaze spring 50 is formed in an annular shape and is extrapolated to the front end portion of the bush 14. The base end portion 51 of the kohaze spring 50 is supported by the support cylinder 13 via the bush 14 in a state including a vertical shaving between the flange 14a of the bush 14 and the seat surface of the screw 15.

As shown in FIG. 4, the kohaze spring 50 is formed in a U shape so that the intermediate portion 52 is provided at a position farther from the second axis P than the base end portion 51 and the tip end portion 53. In the present embodiment, the kohaze spring 50 extends linearly from the base end portion 51 when viewed from the front and back directions, then bends 180 ° at the intermediate portion 52, and extends linearly toward the tip end portion 53. The first portion 54 between the base end portion 51 and the intermediate portion 52 is located downstream of the second portion 55 between the intermediate portion 52 and the tip portion 53 in the engaging direction. A pin 45 of the kohaze 40 is arranged between the first portion 54 and the second portion 55. The second portion 55 is in contact with the pin 45 from the upstream side in the engaging direction. In this embodiment, the tip portion 53 is in contact with the pin 45. The first portion 54 is in contact with the contact pin 16 fixed to the barrel holder 12 from the downstream side in the engaging direction. The contact pin 16 is erected on the front side from the barrel holder 12 in the region between the first portion 54 and the second portion 55 when viewed from the front and back directions. As a result, the kohaze spring 50 is restricted from rotating in the direction opposite to the engaging direction with respect to the barrel receiving 12. Then, the kohaze spring 50 urges the pin 45 with respect to the barrel receiving 12 in the engaging direction. Therefore, the kohaze spring 50 urges the claw portion 42 of the kohaze 40 toward the square hole wheel 30.

Here, the force acting on the kohaze 40 and the square hole wheel 30 will be described.
6 and 7 are views for explaining the operation of the movement of the embodiment, and is a plan view of the main part of the movement of the embodiment as viewed from the front side.
As shown in FIG. 6, the contact portion 60 between the claw portion 42 of the kohaze 40 and the square hole wheel 30 is located downstream of the center line C in the first rotation direction D1. The tip surface 46 of the claw portion 42 faces the downstream side of the first rotation direction D1 at the contact portion 60 between the kohaze 40 and the square hole wheel 30. The tooth surface 32 of the square hole wheel 30 is in contact with the tip surface 46 of the claw portion 42 from the downstream side in the first rotation direction D1. When the square hole wheel 30 receives the torque in the second rotation direction D2 due to the restoring force when the royal fern 23 is unwound, the force F from the square hole wheel 30 acts on the tip surface 46 of the claw portion 42. The force F from the square hole wheel 30 acts from the contact portion 60 between the kohaze 40 and the square hole wheel 30 in the tangential direction of the circle centered on the first axis O.

Here, since the tip surface 46 of the claw portion 42 extends in an arc shape centered on the second axis P when viewed from the front and back directions, the tip surface 46 of the claw portion 42 and the tooth surface 32 of the square hole wheel 30 The normal line N at the contact portion 60 of the above passes through the second axis line P. Therefore, of the forces F from the square hole wheel 30 acting on the tip surface 46 of the claw portion 42, the component force F1 in the normal direction N direction acts toward the second axis P. Therefore, the claw portion 42 of the kohaze 40 stretches the square hole wheel 30 without rotating around the second axis P, and regulates the rotation of the square hole wheel 30 in the second rotation direction D2.

Further, the claw portion 42 of the kohaze 40 is urged toward the square hole wheel 30 by the kohaze spring 50. Therefore, the claw portion 42 is located on the upstream side of the first rotation direction D1 of the plurality of teeth 31 of the square hole wheel 30 with respect to the tooth 31 in contact with the tip surface 46 of the claw portion 42. It is in contact with the tooth 31 from the upstream side in the engaging direction. Therefore, the claw portion 42 is restricted from rotating in the engaging direction, and maintains the state in which the square hole wheel 30 is stretched.

On the other hand, as shown in FIG. 7, when the torque in the first rotation direction D1 when winding the Zenmai 23 acts on the square hole wheel 30, the square hole wheel 30 resists the urging force of the kohaze spring 50 and the kohaze 40. The claw portion 42 of the is rotated in the direction opposite to the engaging direction. As a result, the square hole wheel 30 rotates in the first rotation direction D1 so that the claw portion 42 of the kohaze 40 gets over the teeth 31 of the square hole wheel 30 one by one.

As described in detail above, in the present embodiment, the contact portion 60 between the claw portion 42 of the kohaze 40 and the square hole wheel 30 is in the first rotation direction D1 with respect to the center line C of the kohaze 40 and the square hole wheel 30. The tip surface 46 of the claw portion 42 of the kohaze 40 is located on the downstream side and is configured to face the downstream side in the first rotation direction D1.
According to this configuration, when the torque in the direction opposite to the first rotation direction D1 (second rotation direction D2) acts on the square hole wheel 30 due to the unwinding of the zenmai 23, the first rotation direction is more than the center line C. At the position on the downstream side of D1, the square hole wheel 30 comes into contact with the claw portion 42 of the kohaze 40 from the downstream side in the first rotation direction D1. Therefore, the claw portion 42 of the kohaze 40 stretches the square hole wheel 30 so as to restrict the rotation of the square hole wheel 30 in the first rotation direction D1. This makes it possible to regulate the rotation of the square hole wheel 30 while maintaining the posture of the claw portion 42 without using other members. Therefore, even if the size of the claw portion 42 is reduced, the kohaze 40 can function as a member for restricting the rotation of the square hole wheel 30 in the direction opposite to the first rotation direction D1. Therefore, it is possible to provide the movement 10 and the timepiece 1 which can be miniaturized as compared with the case where a part of the regulation lever as in the prior art is used as a knead.

Further, the normal line N at the contact portion 60 between the claw portion 42 of the kohaze 40 and the square hole wheel 30 passes through the second axis P when viewed from the front and back directions. According to this configuration, of the forces F from the square hole wheel 30 acting on the claw portion 42 in the contact portion 60, the component force F1 in the normal N direction acts toward the second axis P. Therefore, it is possible to prevent the claw portion 42 of the kohaze 40 from rotating around the second axis P and shifting with respect to the square hole wheel 30. Therefore, the square hole wheel 30 is surely stretched by the claw portion 42 of the kohaze 40, and the rotation of the square hole wheel 30 in the direction opposite to the first rotation direction D1 can be surely restricted.

Further, the claw portion 42 of the kohaze 40 has a tip surface 46 including the contact portion 60 and extending in an arc shape centered on the second axis P when viewed from the front and back directions. According to this configuration, regardless of the position of the tip surface 46 of the claw portion 42, the square hole wheel 30 has a normal N of the forces F from the square hole wheel 30 acting on the claw portion 42. The component force F1 in the direction acts toward the second axis P. Therefore, it is possible to tolerate the misalignment of the contact portion 60 accompanied by the misalignment of the relative positions of the kohaze 40 and the square hole wheel 30.

Further, the kohaze spring 50 is provided so that at least a part thereof overlaps the kohaze 40 when viewed from the front and back directions. According to this configuration, the space for arranging the kohaze spring 40 and the kohaze spring 50 can be reduced as compared with the case where the entire kohaze spring is provided side by side with the kohaze spring when viewed from the front and back directions. Therefore, the movement 10 can be made smaller.

Further, the kohaze spring 50 is a cantilever that engages with the kohaze 40 at the tip portion 53, and the intermediate portion 52 is provided at a position farther from the second axis P than the base end portion 51 and the tip end portion 53. There is. According to this configuration, it is possible to secure the length of the cantilever while suppressing the increase in the maximum outer diameter of the kohaze spring 50 with respect to the second axis P. Therefore, it is possible to reduce the size of the kohaze spring 50 and improve the design freedom of the urging force of the kohaze spring 50 at the same time.

Further, the kohaze 40 includes an operation portion 43 extending from the base portion 41, and the barrel receiving 12 has an avoidance portion 12a formed so as to avoid the operation portion 43 when overlapping with the tip of the operation portion 43 when viewed from the front and back directions. It is formed. According to this configuration, when the kohaze 40 is manually rotated, it is possible to prevent the tool for operating the operation unit 43 from coming into contact with the barrel holder 12, so that workability such as maintenance of the movement 10 can be improved. Can be improved.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above embodiment, the kohaze spring 50 is a cantilever, but the present invention is not limited to this. For example, the kohaze spring may be a torsion coil spring.

Further, in the above embodiment, the normal line N at the contact portion 60 between the tip surface 46 of the claw portion 42 and the tooth surface 32 of the square hole wheel 30 passes through the second axis P, but the present invention is not limited to this. The normal at the contact portion between the tip surface of the claw portion and the tooth surface 32 of the square hole wheel 30 may intersect the center line C between the first axis O and the second axis P. In this case, of the forces from the square hole wheel 30 acting on the claw portion, the component force in the normal direction shifts to the downstream side in the engagement direction with respect to the direction toward the second axis P, and thus engages with the claw portion. Torque in the direction acts. However, since the claw portion is in contact with the tooth 31 located on the upstream side of the first rotation direction D1 from the upstream side in the engaging direction, the claw portion is in contact with the tooth 31 located on the upstream side of the first rotation direction D1. The square hole wheel 30 can be stretched without rotating.

Further, the normal at the contact portion between the tip surface of the claw portion and the tooth surface 32 of the square hole wheel 30 does not have to intersect the center line C. In this case, of the forces from the square hole wheel 30 acting on the claw portion, the component force in the normal direction shifts to the upstream side in the engagement direction with respect to the direction toward the second axis P, and thus engages with the claw portion. Torque acts in the direction opposite to the direction. However, by appropriately setting the frictional force at the contact portion between the claw portion and the square hole wheel 30, the claw portion is suppressed from rotating in the direction opposite to the engaging direction, and the square hole wheel 30 is stretched. be able to.

Further, in the above embodiment, the tip surface 46 of the claw portion 42 extends in an arc shape centered on the second axis P when viewed from the front and back directions, but the present invention is not limited to this. For example, the tip surface of the claw portion may extend linearly when viewed from the front and back directions.

Further, in the above embodiment, the pin 45 of the kohaze 40 is provided on the urging lever 44, but the portion where the pin is provided is not particularly limited. Further, the kohaze spring may be provided so as to engage with a portion other than the pin, such as an urging lever.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 ... Clock 10 ... Movement 23 ... Zenmai 30 ... Square hole wheel 40 ... Kohaze 42 ... Claw 46 ... Tip surface (contact surface) 50 ... Spring (spring) 51 ... Base end 52 ... Middle part 53 ... Tip Part 60 ... Contact part O ... 1st axis P ... 2nd axis D1 ... 1st rotation direction C ... Center line N ... Normal

Claims (5)

A square hole wheel that can rotate around the first axis and is provided so that the royal fern can be wound up.
A kohaze that is rotatably provided around the second axis and has a claw that meshes with the square hole wheel.
Equipped with
The contact portion between the claw portion and the square hole wheel is located downstream of the center line of the kohaze and the square hole wheel in the first rotation direction of the square hole wheel when the royal fern is wound up.
The surface of the claw portion faces the downstream side in the first rotation direction at the contact portion .
The normal at the contact portion passes through the second axis when viewed from the axial direction of the second axis.
A movement characterized by that. The claw portion includes the contact portion and has a contact surface extending in an arc shape centered on the second axis when viewed from the axial direction of the second axis.
The movement according to claim 1 . Further provided with an urging member that engages with the saw and urges the claw portion toward the square hole wheel.
The urging member is provided so that at least a part thereof overlaps with the knead when viewed from the axial direction of the second axis.
The movement according to claim 1 or 2 , wherein the movement is characterized in that. The urging member is a cantilever that engages with the knot at the tip portion, and the intermediate portion is provided at a position away from the base end portion and the tip portion from the second axis.
The movement according to claim 3 . A timepiece comprising the movement according to any one of claims 1 to 4 .

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