CN110083044B - Movement and timepiece - Google Patents
Movement and timepiece Download PDFInfo
- Publication number
- CN110083044B CN110083044B CN201910061509.XA CN201910061509A CN110083044B CN 110083044 B CN110083044 B CN 110083044B CN 201910061509 A CN201910061509 A CN 201910061509A CN 110083044 B CN110083044 B CN 110083044B
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- Prior art keywords
- pawl
- ratchet
- axis
- movement
- timepiece
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B5/00—Automatic winding up
- G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B11/00—Click devices; Stop clicks; Clutches
- G04B11/02—Devices allowing the motion of a rotatable part in only one direction
- G04B11/022—Devices allowing the motion of a rotatable part in only one direction with a ratchet which makes contact with the rotating member by means of teeth
- G04B11/024—Devices allowing the motion of a rotatable part in only one direction with a ratchet which makes contact with the rotating member by means of teeth rotatable about a fixed axis by means of spring action
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B11/00—Click devices; Stop clicks; Clutches
- G04B11/02—Devices allowing the motion of a rotatable part in only one direction
- G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B5/00—Automatic winding up
- G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
- G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission Devices (AREA)
- Electromechanical Clocks (AREA)
Abstract
The invention provides a movement and a timepiece, wherein the movement can be miniaturized. A movement (10) is provided with: a ratchet (30) rotatable about a 1 st axis (O) and arranged to wind up a spring; and a pawl (40) provided rotatably about the 2 nd axis (P) and having a pawl portion (42) that engages with the ratchet (30). A contact portion (60) of the pawl portion (42) and the ratchet wheel (30) is located on the downstream side of the center line (C) of the pawl (40) and the ratchet wheel (30) in the 1 st rotation direction (D1) of the ratchet wheel (30) when the mainspring is wound up. The distal end surface (46) of the claw (42) faces the downstream side in the 1 st rotational direction (D1) at the contact portion (60).
Description
Technical Field
The invention relates to a movement and a timepiece.
Background
Conventionally, a movement of a mechanical timepiece includes: a barrel wheel for accommodating the power spring; a ratchet wheel for winding up the spring; and a wind-up wheel train for rotating the ratchet wheel. In order to prevent unwinding of the wound spring, a pawl for restricting reverse rotation of the ratchet is engaged with the ratchet. For example, patent document 1 describes a restricting lever formed of a plate material and having one end used as a pawl.
Patent document 1: japanese Kokai publication Sho-52-162172
However, in the technique described in patent document 1, since the regulating lever is provided so as to radially straddle the ratchet wheel, a space for disposing the regulating lever needs to be located at a position overlapping the ratchet wheel. Therefore, the movement becomes large in the thickness direction of the ratchet. Further, in the technique described in patent document 1, a structure for maintaining the posture of the pawl is also required, and therefore, the movement may become large in size on a plane. Therefore, the conventional technology has a problem of miniaturizing the movement and the timepiece including the movement.
Disclosure of Invention
Therefore, the present invention provides a movement and a timepiece that can be miniaturized.
The movement of the present invention is characterized by comprising: a ratchet wheel rotatable about a 1 st axis and arranged to wind up a power spring; and a pawl provided rotatably about a 2 nd axis and having a pawl portion that meshes with the ratchet wheel, a contact portion of the pawl portion with the ratchet wheel being located on a downstream side in a 1 st rotational direction of the ratchet wheel when the mainspring is wound up from a center line of the pawl and the ratchet wheel, a surface of the pawl portion being directed toward the downstream side in the 1 st rotational direction at the contact portion.
According to the present invention, when a torque in the direction opposite to the 1 st rotation direction acts on the ratchet by unwinding of the mainspring, the ratchet contacts the pawl portion of the pawl from the 1 st rotation direction downstream side with respect to the center line of the pawl and the ratchet in the 1 st rotation direction. Therefore, the pawl portion of the pawl abuts against the ratchet wheel in such a manner as to restrict the rotation of the ratchet wheel in the 1 st rotation direction. This makes it possible to restrict the ratchet rotation while maintaining the posture of the pawl portion without using any other member. Therefore, even if the pawl portion is downsized, the pawl can function as a member for restricting the rotation of the ratchet in the direction opposite to the 1 st rotation direction. Therefore, as compared with the case where a part of the regulating lever is used as the click as in the conventional art, a movement which can be downsized can be provided.
In the movement described above, it is preferable that a normal line at the contact portion passes through the 2 nd axis when viewed from the 2 nd axis axial direction.
According to the present invention, the normal direction component of the force from the ratchet acting on the pawl at the contact portion acts toward the 2 nd axis, and therefore, the pawl portion of the pawl can be suppressed from rotating about the 2 nd axis and shifting with respect to the ratchet. Therefore, the ratchet is reliably pressed by the pawl portion of the pawl, and the rotation of the ratchet in the direction opposite to the 1 st rotation direction can be reliably restricted.
In the above-described movement, it is preferable that the claw portion has a contact surface including the contact portion, and the contact surface extends in an arc shape with the 2 nd axis as a center when viewed from the 2 nd axis direction.
According to the present invention, even when the ratchet wheel is in contact with an arbitrary position of the contact surface of the pawl portion, a component force in the normal direction among forces from the ratchet wheel acting on the pawl portion acts toward the 2 nd axis. Therefore, the positional deviation of the contact portion accompanying the positional deviation of the relative positions of the pawl and the ratchet can be allowed.
In the above-described movement, it is preferable that the movement further includes a biasing member that engages with the pawl and biases the pawl portion toward the ratchet, the biasing member being provided to: at least a part of the urging member overlaps the pawl when viewed in the 2 nd axis line direction.
According to the present invention, the space for disposing the pawl and the biasing member can be reduced as compared with a case where the entire biasing member is arranged side by side with the pawl when viewed from the front-back direction. Therefore, the movement can be further miniaturized.
In the above-described movement, it is preferable that the biasing member is a cantilever beam that engages with the pawl at a distal end portion, and is provided at a position where an intermediate portion is further away from the 2 nd axis than a proximal end portion and the distal end portion.
According to the present invention, the length of the cantilever can be ensured while suppressing the increase in the maximum outer diameter of the biasing member with respect to the 2 nd axis P. Therefore, the miniaturization of the urging member and the improvement of the degree of freedom in the design of the urging force of the urging member can be both achieved.
The timepiece of the present invention is characterized by including the movement described above.
According to the present invention, since the timepiece includes the movement that can be miniaturized, the timepiece can be miniaturized.
According to the present invention, a movement and a timepiece that can be miniaturized can be provided.
Drawings
Fig. 1 is an external view of a timepiece according to an embodiment.
Fig. 2 is a plan view of the movement of the embodiment viewed from the front side.
Fig. 3 is a sectional view taken along the line III-III in fig. 2.
Fig. 4 is a plan view of an important part of the movement of the embodiment, as viewed from the front side.
Fig. 5 is a sectional view taken along line V-V in fig. 2.
Fig. 6 is a diagram illustrating an operation of the movement according to the embodiment.
Fig. 7 is a diagram illustrating an operation of the movement according to the embodiment.
Description of the reference symbols
1: a timepiece; 10: a movement; 23: a clockwork spring; 30: a ratchet wheel; 40: a pawl; 42: a claw portion; 46: a tip surface (contact surface); 50: a pawl spring (urging member); 51: a base end portion; 52: an intermediate portion; 53: a terminal portion; 60: a contact portion; o: 1 st axis; p: a 2 nd axis; d1: 1 st rotation direction; c: a centerline; n: normal line.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are used for the components having the same or similar functions. Moreover, a repetitive description of these configurations may be omitted.
In general, a mechanical body including a drive portion of a timepiece is referred to as a "movement". The state in which the dial and the hands are mounted on the movement and then put into the timepiece case to be formed into a finished product is called "finished product" of the timepiece. Of the two sides of the bottom plate constituting the timepiece substrate, the side on which the glass of the timepiece case is present (the side on which the dial is present) is referred to as the "back side" of the movement. Of the two sides of the bottom plate, the side on which the case back cover of the timepiece case (the side opposite to the dial) is present is referred to as the "front side" of the movement. Each gear described below is provided with the front-back direction of the movement as the rotation axis direction.
Fig. 1 is an external view of a timepiece according to an embodiment.
As shown in fig. 1, the finished timepiece 1 of the present embodiment includes, in a case 3 including a case back cover and a glass 2, not shown: a movement 10; a dial 4 having scales or the like indicating at least time-related information; and hands including an hour hand 5 indicating hours, a minute hand 6 indicating minutes, and a second hand 7 indicating seconds. The timepiece 1 is a so-called automatic winding type wristwatch in which a pendulum (not shown) is rotated by the movement of a user, and a power spring 23 (see fig. 3) as a power source of the timepiece 1 is wound up via an automatic winding train. In addition, timepiece 1 can wind up spring 23 manually, and wind up spring 23 via a manual winding train by rotating crown 8.
Fig. 2 is a plan view of the movement of the embodiment viewed from the front side. Fig. 3 is a sectional view taken along the line III-III in fig. 2.
As shown in fig. 2 and 3, the movement 10 includes: a base plate 11; a barrel clamp plate 12 disposed on the front side of the bottom plate 11; a barrel wheel 20 in which a power spring 23 is housed; a ratchet 30 provided to wind up the power spring 23; a pawl 40 having a pawl portion 42 that engages with the ratchet wheel 30; and a pawl spring 50 (urging member) engaged with the pawl 40. The movement 10 includes a barrel wheel 20, a face-side gear train including a second, third, and fourth wheels, not shown, and an escape governor including a balance spring mechanism, an escape wheel, an escape fork, and the like, but detailed description thereof is omitted.
As shown in fig. 3, the barrel wheel 20 has: a bar shaft 21; a barrel 22 mounted on the barrel shaft 21; and a power spring 23 housed in a barrel 22. The barrel shaft 21 is supported by the bottom plate 11 and the barrel plate 12 so as to be rotatable about the 1 st axis O. The barrel 22 is rotatably supported by the barrel shaft 21. The inner end of the power spring 23 is connected to the barrel shaft 21. The outer end of the power spring 23 is connected to the inner peripheral surface of the barrel 22. By rotating the winding shaft 21, the power spring 23 is wound up. The barrel 22 is rotated by the restoring force when the clockwork 23 is unwound, and drives the front side train.
The ratchet 30 is arranged on the same axis as the barrel wheel 20. The ratchet 30 is fixed to the barrel shaft 21 at a portion between the barrel 22 and the barrel plate 12. The ratchet 30 rotates integrally with the barrel shaft 21 in the 1 st rotation direction D1 (see fig. 4) about the 1 st axis O, thereby winding up the mainspring 23 housed in the barrel case 22. The ratchet 30 is applied with a torque in the 2 nd rotation direction D2 opposite to the 1 st rotation direction D1 due to the restoring force of the winding spring 23 during unwinding. Teeth 31 are formed on the outer periphery of the ratchet 30. The automatic winding wheel train or the manual winding wheel train has a gear (e.g., a small steel wheel) engaged with the ratchet 30.
The pawl 40 is configured not to coincide with the ratchet 30 when viewed from the forward and reverse directions. The pawl 40 is supported by the barrel clamp 12 for rotation about the 2 nd axis P. Specifically, the pawl 40 is externally fitted to a cylindrical support tube 13 that is erected from the barrel plate 12 to the front side. The end portion of the support cylinder 13 on the front surface side is formed to have a diameter smaller than that of the portion of the support cylinder 13 to which the pawl 40 is externally inserted. A bush 14 is inserted to the outside of the front end of the support cylinder 13. The bush 14 is sandwiched between the stepped surface of the support tube 13 and a seat surface of a screw 15 screwed into the support tube 13 from the front side. A flange 14a protruding radially outward is provided at the end portion on the back side of the bush 14. The outer diameter of the flange 14a is formed to be larger than the portion of the support tube 13 to which the pawls 40 are externally fitted. The outer diameter of the portion of the bush 14 on the front surface side of the flange 14a is smaller than the outer diameter of the head of the screw 15. The pawl 40 is supported on the support tube 13 in a state including a longitudinal play between the barrel plate 12 and the flange 14a of the bush 14. And, the longitudinal play is a play in the thrust direction with respect to the shaft.
Fig. 4 is a plan view of an important part of the movement of the embodiment, as viewed from the front side.
As shown in fig. 4, the pawl 40 includes: an annular base 41 externally fitted to the support cylinder 13 (see fig. 3); a claw portion 42, an operating portion 43, and a forced lever 44 that extend from the base portion 41 in a direction perpendicular to the 2 nd axis P; and a pin 45 provided on the applied-force lever 44. The pawl 42 extends toward the ratchet 30. The pawl 42 contacts the ratchet 30 at the contact portion 60. The contact portion 60 between the pawl 42 and the ratchet 30 is located downstream of the center line C between the pawl 40 and the ratchet 30 in the 1 st rotational direction D1. Further, the center line C of the pawl 40 and the ratchet 30 is a line segment connecting the center of the pawl 40 (the 2 nd axis P) and the center of the ratchet 30 (the 1 st axis O) when viewed from the forward and reverse directions.
The claw portion 42 has a distal end surface 46 (contact surface) including a contact portion 60. The distal end surface 46 of the claw portion 42 extends in an arc shape centered on the 2 nd axis P when viewed from the front-back direction. The distal end surface 46 of the claw portion 42 faces the downstream side in the 1 st rotation direction D1. The tooth surface 32 of the ratchet 30 abuts against the distal end surface 46 of the pawl 42 from the downstream side in the 1 st rotation direction D1. In the following description, a direction in which the tip of the claw portion 42 approaches the center line C in the circumferential direction around the 2 nd axis P is referred to as an engagement direction.
The operating portion 43 is a rod-shaped portion that is operated when the pawl 40 is manually rotated. The operation portion 43 is provided at a position different from the claw portion 42. In the present embodiment, the operation portion 43 is provided on the opposite side of the claw portion 42 with the 2 nd axis P therebetween. As shown in fig. 2, a relief portion 12a is formed in the barrel plate 12 at a position overlapping with the tip end of the operating portion 43 when viewed in the front-back direction, and the relief portion 12a is formed so as to avoid the operating portion 43. In the present embodiment, the escape portion 12a is a through hole that penetrates the barrel plate 12 in the forward and backward directions. The escape portion 12a is a space for preventing a tool for operating the operating portion 43 from coming into contact with the barrel clamp 12 when the pawl 40 is manually rotated.
As shown in fig. 4, the applied-force lever 44 is provided at a position different from the claw portion 42 and the operating portion 43. In the present embodiment, the urged lever 44 is provided between the operating portion 43 and the center line C and on the opposite side of the claw portion 42 with the center line C therebetween when viewed from the front-back direction.
Fig. 5 is a sectional view taken along line V-V in fig. 2.
As shown in fig. 5, a pin insertion portion 44a into which the pin 45 is inserted is formed in the force application lever 44. The pin insertion portion 44a is a hole penetrating in the front-back direction.
The pin 45 is inserted into the pin insertion portion 44a from the front side and fixed to the force application rod 44. The pin 45 is formed in a cylindrical shape extending in the front and back directions. A flange 45a protruding outward in the radial direction is formed at the front end of the pin 45.
The click spring 50 is disposed on the front surface side of the barrel plate 12. The pawl spring 50 is a cantilever beam that biases the pawl 40 in the engaging direction. A base end portion 51 of the click spring 50 is formed in an annular shape and is externally fitted to an end portion on the front surface side of the bush 14. The base end portion 51 of the click spring 50 is supported by the support tube 13 via the bush 14 in a state where there is a vertical play between the flange 14a of the bush 14 and the seat surface of the screw 15.
As shown in fig. 4, the detent spring 50 is formed in a U shape as follows: the intermediate portion 52 is provided at a position farther from the 2 nd axis P than the base end portion 51 and the tip end portion 53. In the present embodiment, the click spring 50 extends linearly from the base end portion 51, then bends 180 ° at the intermediate portion 52, and extends linearly toward the tip end portion 53 when viewed from the front-back direction. The 1 st portion 54 between the base end portion 51 and the intermediate portion 52 is located on the downstream side in the engaging direction from the 2 nd portion 55 between the intermediate portion 52 and the tip end portion 53. The pin 45 of the pawl 40 is disposed between the 1 st part 54 and the 2 nd part 55. The 2 nd portion 55 is in contact with the pin 45 from the upstream side in the engaging direction. In the present embodiment, the tip portion 53 is in contact with the pin 45. The 1 st portion 54 is in contact with the abutment pin 16 fixed to the barrel plate 12 from the downstream side in the engaging direction. The abutment pin 16 is provided upright from the barrel plate 12 to the front side in a region between the 1 st part 54 and the 2 nd part 55 as viewed from the front-back direction. Thereby, the rotation of the click spring 50 in the direction opposite to the engagement direction with respect to the barrel bridge 12 is regulated. The click spring 50 biases the pin 45 in the engaging direction with respect to the barrel plate 12. Thus, the pawl spring 50 urges the pawl portion 42 of the pawl 40 toward the ratchet 30.
Here, the force acting on the pawl 40 and the ratchet 30 will be explained.
Fig. 6 and 7 are views for explaining the operation of the movement according to the embodiment, and are plan views of important parts of the movement according to the embodiment as viewed from the front side.
As shown in fig. 6, the contact portion 60 between the pawl portion 42 of the pawl 40 and the ratchet 30 is located downstream of the center line C in the 1 st rotational direction D1. The distal end surface 46 of the pawl 42 faces the downstream side in the 1 st rotation direction D1 at the contact portion 60 of the pawl 40 and the ratchet 30. The tooth surface 32 of the ratchet 30 contacts the tip end surface 46 of the pawl 42 from the downstream side in the 1 st rotation direction D1. When the ratchet 30 receives a torque in the 2 nd rotation direction D2 due to a restoring force generated when the spring 23 unwinds, a force F from the ratchet 30 acts on the distal end surface 46 of the pawl 42. The force F from the ratchet 30 acts from the contact portion 60 of the pawl 40 and the ratchet 30 in a tangential direction of a circle centered on the 1 st axis O.
Here, the distal end surface 46 of the pawl 42 extends in an arc shape centered on the 2 nd axis P when viewed from the front-back direction, and therefore the normal N at the contact portion 60 between the distal end surface 46 of the pawl 42 and the tooth surface 32 of the ratchet 30 passes through the 2 nd axis P. Thus, a component force F1 in the normal N direction among the forces F from the ratchet 30, which acts on the distal end surface 46 of the pawl 42, acts toward the 2 nd axis P. Thus, the pawl portion 42 of the pawl 40 bears against the ratchet wheel 30 without rotating about the 2 nd axis P, thereby restricting rotation of the ratchet wheel 30 in the 2 nd rotational direction D2.
Further, the pawl portion 42 of the pawl 40 is biased toward the ratchet 30 by the pawl spring 50. Therefore, the pawl 42 contacts the tooth 31 of 1 tooth on the upstream side in the 1 st rotation direction D1 from the tooth 31 contacting the distal end surface 46 of the pawl 42 among the plurality of teeth 31 of the ratchet wheel 30 on the upstream side in the engaging direction. Accordingly, the rotation of the pawl 42 in the engaging direction is restricted, and the state of being pressed against the ratchet 30 can be maintained.
On the other hand, as shown in fig. 7, when the torque in the 1 st rotational direction D1 is applied to the ratchet 30 when the wind spring 23 is wound up, the ratchet 30 rotates the pawl portion 42 of the pawl 40 in the opposite direction to the engaging direction against the biasing force of the pawl spring 50. Thereby, the ratchet 30 rotates in the 1 st rotation direction D1 such that the pawl portions 42 of the pawls 40 pass over the teeth 31 of the ratchet 30 one by one.
As described above in detail, in the present embodiment, the contact portion 60 between the pawl portion 42 of the pawl 40 and the ratchet 30 is located downstream in the 1 st rotational direction D1 from the center line C between the pawl 40 and the ratchet 30, and the distal end surface 46 of the pawl portion 42 of the pawl 40 is located downstream in the 1 st rotational direction D1.
According to this configuration, when torque in the direction opposite to the 1 st rotation direction D1 (the 2 nd rotation direction D2) acts on the ratchet 30 due to unwinding of the spring 23, the ratchet 30 contacts the pawl portion 42 of the pawl 40 from the downstream side in the 1 st rotation direction D1 with respect to the center line C at the downstream side in the 1 st rotation direction D1. Therefore, the pawl portion 42 of the pawl 40 abuts against the ratchet wheel 30 in such a manner as to restrict the ratchet wheel 30 from rotating in the 1 st rotating direction D1. This allows the ratchet 30 to be restricted from rotating while maintaining the posture of the pawl 42 without using any other member. Therefore, even if the pawl portion 42 is downsized, the pawl 40 can be made to function as a member for restricting the rotation of the ratchet 30 in the direction opposite to the 1 st rotation direction D1. Therefore, as compared with the case where a part of the regulating lever is used as the click as in the conventional art, the movement 10 and the timepiece 1 that can be downsized can be provided.
In addition, a normal N at the contact portion 60 of the pawl portion 42 of the pawl 40 and the ratchet 30 passes through the 2 nd axis P when viewed from the normal-reverse direction. According to this structure, a component force F1 in the normal N direction among the forces F from the ratchet 30 acting on the pawl 42 at the contact portion 60 acts toward the 2 nd axis P. Therefore, the following can be suppressed: the pawl portion 42 of the pawl 40 rotates about the 2 nd axis P to be offset relative to the ratchet wheel 30. Therefore, the ratchet 30 is reliably held by the pawl portion 42 of the pawl 40, and the rotation of the ratchet 30 in the direction opposite to the 1 st rotation direction D1 can be reliably restricted.
The claw portion 42 of the pawl 40 has a distal end surface 46, and the distal end surface 46 includes a contact portion 60 and extends in an arc shape centered on the 2 nd axis P when viewed in the front-back direction. According to this structure, even in the case where the ratchet 30 is in contact with an arbitrary position of the distal end surface 46 of the pawl 42, the component force F1 in the normal N direction among the forces F from the ratchet 30 acting on the pawl 42 acts toward the 2 nd axis P. Therefore, the positional deviation of the contact portion 60 accompanying the positional deviation of the relative positions of the pawl 40 and the ratchet 30, etc. can be allowed.
In addition, the detent spring 50 is provided: at least a portion of which coincides with the pawl 40 when viewed from the front-to-back direction. According to this configuration, the space for arranging the ratchet 40 and the ratchet spring 50 can be reduced as compared with a case where the ratchet spring is arranged side by side as a whole as viewed from the front-back direction. Therefore, the movement 10 can be further miniaturized.
The pawl spring 50 is a cantilever beam that engages with the pawl 40 at the distal end portion 53, and is provided at a position where the intermediate portion 52 is further away from the 2 nd axis P than the base end portion 51 and the distal end portion 53. According to this configuration, the length of the cantilever beam can be ensured while suppressing the maximum outer diameter of the click spring 50 with respect to the 2 nd axis P from increasing. Therefore, the miniaturization of the detent spring 50 and the improvement of the degree of freedom in design of the biasing force of the detent spring 50 can be achieved at the same time.
The pawl 40 includes an operating portion 43 extending from the base portion 41, and the barrel plate 12 is formed with a relief portion 12a formed so as to avoid the operating portion 43 at a position overlapping with a tip end of the operating portion 43 when viewed in the front-back direction. According to this configuration, when the pawl 40 is manually rotated, a tool for operating the operation portion 43 can be prevented from coming into contact with the barrel bridge 12, and therefore, workability in maintenance of the movement 10 and the like can be improved.
The present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above embodiment, the pawl spring 50 is a cantilever beam, but is not limited thereto. For example, the pawl spring may be a torsion coil spring.
In addition, in the above embodiment, the normal N at the contact portion 60 of the tip end face 46 of the pawl 42 and the tooth face 32 of the ratchet 30 passes through the 2 nd axis P, but is not limited thereto. The normal line at the contact portion of the distal end face of the pawl and the tooth face 32 of the ratchet 30 may also intersect the center line C between the 1 st axis O and the 2 nd axis P. In this case, a component force in the normal direction out of the force from the ratchet 30 acting on the pawl is shifted to the downstream side in the engaging direction with respect to the direction toward the 2 nd axis P, and therefore, a torque in the engaging direction acts on the pawl. However, since the pawl portion contacts the tooth 31 of 1 tooth on the upstream side in the 1 st rotation direction D1 from the upstream side in the engaging direction than the tooth 31 contacting the distal end surface, the pawl portion can abut against the ratchet 30 and cannot rotate in the engaging direction.
In addition, the normal line at the contact portion of the tip end face of the pawl and the tooth face 32 of the ratchet 30 may not intersect the center line C. In this case, a component force in the normal direction out of the force from the ratchet 30 acting on the pawl is offset to the upstream side in the engaging direction with respect to the direction toward the 2 nd axis P, and therefore, a torque in the opposite direction to the engaging direction acts on the pawl. However, by appropriately setting the frictional force at the contact portion between the pawl portion and the ratchet 30, the pawl portion can be prevented from rotating in the opposite direction to the engagement direction and being pressed against the ratchet 30.
In the above embodiment, the distal end surface 46 of the claw portion 42 extends in an arc shape centered on the 2 nd axis P when viewed from the front-back direction, but the present invention is not limited thereto. For example, the distal end surface of the claw portion may extend linearly when viewed from the front-back direction.
In the above embodiment, the pin 45 of the pawl 40 is provided on the force applied lever 44, but the location where the pin is provided is not particularly limited. Further, the click spring may be provided so as to engage with a portion other than the pin, such as the applied force lever.
In addition, the components in the above embodiments may be replaced with known components as appropriate without departing from the scope of the present invention.
Claims (6)
1. A machine core is characterized in that a machine core is provided,
the movement is provided with:
a ratchet wheel rotatable about a 1 st axis and arranged to wind up a power spring; and
a pawl provided to be rotatable about a 2 nd axis and having a pawl portion engaged with the ratchet,
a contact portion between the pawl portion and the ratchet wheel is located on a downstream side in a 1 st rotation direction of the ratchet wheel when the mainspring is wound up from a center line of the pawl and the ratchet wheel,
the distal end surface of the claw portion faces the downstream side in the 1 st rotation direction at the contact portion.
2. The cartridge of claim 1,
a normal line at the contact portion passes through the 2 nd axis when viewed from an axial direction of the 2 nd axis.
3. Movement according to claim 2,
the claw portion has a contact surface including the contact portion, and the contact surface extends in an arc shape with the 2 nd axis as a center when viewed from the 2 nd axis direction.
4. Movement according to any one of claims 1 to 3,
the movement further includes a biasing member that engages with the pawl and biases the pawl portion toward the ratchet,
the force application member is configured to: at least a part of the urging member overlaps the pawl when viewed in the 2 nd axis line direction.
5. Movement according to claim 4,
the urging member is a cantilever beam that engages with the pawl at a distal end portion, and is provided at a position where the intermediate portion is further away from the 2 nd axis than the proximal end portion and the distal end portion.
6. A timepiece, characterized in that it comprises, in a case,
the timepiece is provided with the movement of any one of claims 1 to 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-011773 | 2018-01-26 | ||
| JP2018011773A JP7023124B2 (en) | 2018-01-26 | 2018-01-26 | Movement and watches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110083044A CN110083044A (en) | 2019-08-02 |
| CN110083044B true CN110083044B (en) | 2021-10-29 |
Family
ID=67400221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910061509.XA Active CN110083044B (en) | 2018-01-26 | 2019-01-23 | Movement and timepiece |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7023124B2 (en) |
| CN (1) | CN110083044B (en) |
| CH (1) | CH714613B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7260446B2 (en) * | 2019-09-12 | 2023-04-18 | セイコーウオッチ株式会社 | Transmission wheel, self-winding mechanism, watch movement and watch |
| EP3889690A1 (en) | 2020-03-31 | 2021-10-06 | ETA SA Manufacture Horlogère Suisse | Pawl for timepiece movement |
| US20230297029A1 (en) * | 2020-08-31 | 2023-09-21 | Citizen Watch Co., Ltd. | Train wheel holding structure and timepiece |
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| US3855781A (en) * | 1972-12-22 | 1974-12-24 | Suwa Seikosha Kk | Step motor mechanism for electronic timepiece |
| JPS52162172U (en) * | 1976-06-03 | 1977-12-08 | ||
| EP1136892A1 (en) * | 2000-03-20 | 2001-09-26 | Audemars Piguet (Renaud et Papi) SA | Ratcheting drive mechanism for ratchet-wheel in a timepiece winding-mechanism |
| CN101051213A (en) * | 2006-04-07 | 2007-10-10 | Eta瑞士钟表制造股份有限公司 | Reverser mechanism for uni-directional rotational driving of a wheel set |
| CN104049518A (en) * | 2013-03-12 | 2014-09-17 | 精工电子有限公司 | Torque adjusting device, movement and mechanical clock |
| CN106909049A (en) * | 2015-12-22 | 2017-06-30 | 蒙特雷布勒盖股份有限公司 | Clockwork including setting the pivotal part of the return mechanism that is magnetic |
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| CH158576A (en) * | 1931-09-23 | 1932-11-30 | Mader & Cie | Device for automatic winding of timepieces. |
| JPS54181970U (en) * | 1978-06-13 | 1979-12-22 | ||
| JP4028865B2 (en) | 2004-10-05 | 2007-12-26 | 株式会社ヒポクラテス | Separation structure for separating liquid components from a mixed sample in which the sample and additive liquid are mixed |
| CN201302658Y (en) * | 2008-12-01 | 2009-09-02 | 浙江西尔灵钟表有限公司 | Movement device of progressive ringing mechanical alarm clock |
| JP5411081B2 (en) * | 2010-07-30 | 2014-02-12 | セイコーインスツル株式会社 | Hand-wound wheel train, watch movement equipped with the train wheel, and watch equipped with the movement |
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2018
- 2018-01-26 JP JP2018011773A patent/JP7023124B2/en active Active
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2019
- 2019-01-23 CN CN201910061509.XA patent/CN110083044B/en active Active
- 2019-01-24 CH CH00077/19A patent/CH714613B1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3855781A (en) * | 1972-12-22 | 1974-12-24 | Suwa Seikosha Kk | Step motor mechanism for electronic timepiece |
| JPS52162172U (en) * | 1976-06-03 | 1977-12-08 | ||
| EP1136892A1 (en) * | 2000-03-20 | 2001-09-26 | Audemars Piguet (Renaud et Papi) SA | Ratcheting drive mechanism for ratchet-wheel in a timepiece winding-mechanism |
| CN101051213A (en) * | 2006-04-07 | 2007-10-10 | Eta瑞士钟表制造股份有限公司 | Reverser mechanism for uni-directional rotational driving of a wheel set |
| CN104049518A (en) * | 2013-03-12 | 2014-09-17 | 精工电子有限公司 | Torque adjusting device, movement and mechanical clock |
| CN106909049A (en) * | 2015-12-22 | 2017-06-30 | 蒙特雷布勒盖股份有限公司 | Clockwork including setting the pivotal part of the return mechanism that is magnetic |
Also Published As
| Publication number | Publication date |
|---|---|
| CH714613A2 (en) | 2019-07-31 |
| CN110083044A (en) | 2019-08-02 |
| JP7023124B2 (en) | 2022-02-21 |
| CH714613B1 (en) | 2022-10-31 |
| JP2019128320A (en) | 2019-08-01 |
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