JP2018096814A - Watch movement and mechanical type watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a watch movement and a mechanical type watch capable of reducing the size.SOLUTION: The watch movement includes: a movement barrel 31; an escape pinion 352; an escape wheel 354; a basic wheel train which includes plural toothed wheels for rotating the escape pinion 352 in conjunction with the movement barrel 31; a square wheel; a rotary weight 51; a self-winding upper wheel column that winds a spiral spring by rotating square wheel in conjunction with the rotary weight 51; a bottom board 61; and a train wheel bridge 64 which is a reception member disposed between the bottom board 61 and the rotary weight 51. The basic wheel train and the self-winding upper wheel column are disposed between the bottom board 61 and the train wheel bridge 64 in an axial direction, and the rotary weight 51 side is journaled by the train wheel bridge 64.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a timepiece movement and a mechanical timepiece having a mainspring automatic winding mechanism.

Conventionally, as a mainspring automatic winding mechanism in a mechanical timepiece, a rotary weight, an eccentric wheel that rotates in conjunction with the rotary weight, a claw lever that is attached to the eccentric wheel and includes a push claw and a pull claw, and a claw Some have a transmission wheel that engages with the pushing claw and pulling claw of the lever and rotates the square wheel. According to this mechanism, the eccentric wheel rotates in conjunction with the rotary weight, so that the claw lever moves forward and backward in the direction approaching and moving away from the transmission wheel. Then, the transmission wheel rotates in one direction in conjunction with the forward / backward movement of the claw lever, the square wheel rotates in conjunction with the transmission wheel, and the mainspring is wound up (for example, see Patent Document 1).
The automatic winding mechanism of the self-winding timepiece of Patent Document 1 includes a first transmission intermediate wheel that rotates in conjunction with a rotating weight, a first transmission wheel (eccentric wheel) that rotates in conjunction with the first transmission intermediate wheel, It has a claw lever and a second transmission wheel.
Moreover, the self-winding timepiece of Patent Document 1 includes a barrel wheel, a minute wheel (second wheel), a third wheel, a fourth wheel, and an escape wheel as basic wheel trains. The rear cover side of the minute wheel is supported by the second support, and the rear cover side of the third, fourth and escape wheels is supported by the third support.
In the automatic hoisting mechanism, the first transmission intermediate wheel and the back cover side of the first transmission wheel are pivotally supported by a third receiver, and the rear cover side of the second transmission wheel is pivotally supported by a transmission receiver. .

Japanese Patent Laid-Open No. 11-183645

  In the self-winding timepiece of Patent Document 1, a plurality of receiving members are provided so as to overlap in the thickness direction. Such a self-winding timepiece has a demand for thinning.

  An object of the present invention is to provide a timepiece movement and a mechanical timepiece that can be reduced in thickness.

  The movement for a watch of the present invention includes a barrel wheel, an escape gear, an escape gear, and a basic wheel train including a plurality of gears that rotate the escape gear in conjunction with the barrel wheel, a square hole wheel, a rotary weight, An automatic winding wheel train that rotates the square wheel wheel in conjunction with the rotating weight to wind up the mainspring, a train wheel receiver that includes a ground plate, and one receiving member provided between the ground plate and the rotating weight. The basic wheel train and the automatic winding train wheel are provided between the main plate and the train wheel bridge in the axial direction, and the rotary weight side is pivotally supported by the wheel train bridge. It is characterized by that.

  In the present invention, the basic wheel train and the self-winding wheel train are pivotally supported by one receiving member on the back cover side. For this reason, compared with the case where the back cover side of the basic train wheel and the automatic winding train wheel is pivotally supported by a plurality of receiving members overlapped in the thickness direction, it is easy to make the watch movement thinner.

  In the timepiece movement of the present invention, the basic wheel train includes a second wheel that meshes with the barrel wheel, a third wheel that meshes with the second wheel, a fourth wheel that meshes with the third wheel and rotates the escaper. The watch movement is provided on the opposite side of the rotating weight side with respect to the main plate, and includes a minute wheel that rotates in conjunction with the second wheel, and the second wheel in plan view. The rotation shaft and the rotation shaft of the fourth wheel are not overlapped, and it is preferable that the fourth wheel and the minute wheel are provided on the same axis.

Since the rotation shaft of the second wheel and the rotation shaft of the fourth wheel are not overlapped in plan view, the rotation weight side of the second and fourth wheels can be supported by a common wheel train.
In addition, the minute wheel to which the minute hand is attached is provided on the side opposite to the rotating weight side with respect to the main plate, so even if the fourth wheel and the minute wheel are provided on the same axis, the rotating weight side of the fourth wheel is Can be supported by a train wheel bridge.
According to this, the rotation weight side of the basic wheel train and the automatic hoisting train wheel can be supported by a common train wheel bearing, and the pointer shaft of the minute hand can be provided coaxially with the rotation shaft of the fourth wheel. it can.

  In the timepiece movement of the present invention, the automatic winding train is attached to the eccentric wheel that rotates in conjunction with the rotating weight, the transmission wheel that rotates the square hole wheel, and the eccentric wheel, and A claw lever that engages with the transmission wheel and moves back and forth in a direction approaching and moving away from the transmission wheel in conjunction with the rotation of the eccentric wheel. It is preferable that the rotating shaft of the gear meshing with the rotating shaft of the eccentric wheel does not overlap.

The gear that meshes with an escape is, for example, the fourth wheel.
According to the present invention, since the rotation shaft of the fourth wheel and the rotation shaft of the eccentric wheel do not overlap in plan view, the fourth wheel and the eccentric wheel can be supported by the common wheel train on the rotary weight side. .

  The timepiece movement of the present invention includes a winding stem and a manual winding wheel train that rotates the square wheel wheel in conjunction with the rotation of the winding stem, and includes at least a part of the manual winding wheel train. The gear is preferably provided between the main plate and the train wheel bridge in the axial direction, and the rotary weight side is pivotally supported by the train wheel bridge.

  According to the present invention, the number of receiving members can be reduced as compared with the case where the rotating weight side of the manually hoisted wheel train is pivotally supported by a receiving member different from the train wheel receiver.

  A mechanical timepiece according to the invention includes the timepiece movement and a case in which the timepiece movement is accommodated.

Since the watch movement is easily thinned, the mechanical watch can also be thinned.
Further, compared to the case where the rotating weight side of the basic train wheel is pivotally supported by a plurality of receiving members, it is less susceptible to the manufacturing variation of the receiving members, and the timepiece accuracy can be improved.

The top view of the timepiece in the embodiment according to the present invention. The top view of the movement in an embodiment. Sectional drawing of the principal part (basic wheel train) of the movement in embodiment. Sectional drawing of the principal part (ankle, balance, small second wheel) of the movement in embodiment. Sectional drawing of the principal part (manual winding mechanism) of the movement in embodiment. Sectional drawing of the principal part (automatic winding mechanism) of the movement in embodiment. The top view of the principal part (automatic winding wheel train) of the movement in an embodiment. The figure which shows the positional relationship of the nail | claw lever which moves forward and backward in embodiment, and a through-hole. The figure which shows the positional relationship of the nail | claw lever which moves forward and backward in embodiment, and a through-hole. The figure which shows the positional relationship of the nail | claw lever which moves forward and backward in embodiment, and a through-hole. The figure which shows the positional relationship of the nail | claw lever which moves forward and backward in embodiment, and a through-hole.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
[Clock configuration]
FIG. 1 is a plan view showing a timepiece 1 which is a mechanical timepiece.
The timepiece 1 includes a cylindrical outer case 11, and a disk-shaped dial 12 is disposed on the inner peripheral side of the outer case 11. Of the two openings of the outer case 11, the opening on the watch face side is closed with a cover glass 13, and the opening on the back face side is closed with a back cover (not shown). Here, the exterior case 11 and the back cover constitute a case.

The timepiece 1 includes a movement 2 (see FIG. 2), a small second hand 21, a minute hand 22, an hour hand 23, and a date wheel 24 housed in a case.
The hands 21 to 23 are arranged on the front side of the dial 12, and the movement 2 is arranged on the back side of the dial 12. The pointers 21 to 23 are attached to the rotation shafts 361, 712, and 722 included in the movement 2 and are driven by the movement 2. The minute hand 22 and the hour hand 23 are attached to rotation shafts 712 and 722 provided at the plane center of the dial 12, and the small second hand 21 is a rotation shaft provided on the 6 o'clock side with respect to the plane center of the dial 12. 361 is attached.

Further, the dial 12 is provided with a calendar small window 12A, and the numerals of the date wheel 24 are visible from the calendar small window 12A. The number of the date indicator 24 represents the “day” of the date.
A crown 14 is provided on the side surface of the outer case 11. By operating the crown 14, it is possible to perform input in accordance with the operation.

[Composition of movement]
FIG. 2 is a plan view of the movement 2 (timepiece movement) of the timepiece 1 as viewed from the back cover side. 2 is the 3 o'clock direction side, the lower side of the drawing is the 9 o'clock direction side, the right side of the drawing is the 12 o'clock direction side, and the left side of the drawing is the 6 o'clock direction side. In FIG. 2, among the receiving members, only the train wheel bridge 64 is indicated by a two-dot chain line, and the remaining receiving members are not shown. In FIG. 2, the illustration of the rotating weight 51 and the bearing 52 is also omitted.
The movement 2 includes a basic wheel train 30, a small second wheel 36, an ankle 37, a balance 38, a manual hoisting mechanism 40, and an automatic hoisting mechanism 50.

3-6 is sectional drawing of the principal part of the movement 2. As shown in FIG. 3 to 6, the upper side of the drawing is the back cover side, and the lower side of the drawing is the dial 12 side.
The movement 2 includes a base plate 61, a winding stem receiver 62, a hoisting receiver 63, and a train wheel receiver 64 from the dial 12 toward the back cover side. The train wheel bridge 64 is also referred to as a rotary weight receiver.

[Basic train wheel]
As shown in FIGS. 2 to 4, the basic wheel train 30 includes a barrel wheel 31, a second wheel 32, a third wheel 33, a fourth wheel 34, and an escape wheel 35.

[Incense car]
As shown in FIGS. 2 and 3, the barrel complete 31 includes a barrel full 311, a barrel complete gear 312, a barrel complete 313, and a spring (not shown) housed in a space surrounded by the barrel complete 312 and the barrel complete 313. It has.
The barrel 311 is provided on the 1 o'clock side with respect to the plane center of the dial 12 in plan view, and is pivotally supported by the main plate 61 and the train wheel bridge 64.
The mainspring is wound up by rotating the barrel complete 311 by a manual hoisting mechanism 40 or an automatic hoisting mechanism 50 described later. The barrel gear 312 rotates around the barrel 311 when the wound spring is rewound.

[Second wheel]
The second wheel 32 includes a rotation shaft 323, a second pinion 321, and a second gear 322. The rotating shaft 323 and the second kana 321 are integrally formed. The rotary shaft 323 is provided on the 10 o'clock side with respect to the plane center of the dial 12 in plan view, and is supported by the main plate 61 and the train wheel bridge 64. The second pinion 321 meshes with the barrel gear 312, and the second wheel 32 rotates in conjunction with the barrel gear 312.
In the timepiece 1, since the minute wheel 71 to which the pointer 22 (minute hand) is attached is provided separately, the rotation shaft 323 of the center wheel & pinion 32 can be provided at a position shifted from the plane center of the dial 12.

[Third car]
The third wheel & pinion 33 includes a rotation shaft 333, a third pinion 331, and a third gear 332. The rotation shaft 333 and the third kana 331 are integrally formed. The rotation shaft 333 is provided on the 10 o'clock side with respect to the plane center of the dial 12 in plan view, and on the plane center side of the dial 12 relative to the rotation shaft 323 of the center wheel 32. The rotating shaft 333 is pivotally supported by the main plate 61 and the train wheel bridge 64. The third pinion 331 meshes with the second gear 322, and the third wheel 33 rotates in conjunction with the second wheel 32.

[Fourth car]
The fourth wheel 34 includes a rotation shaft 343, a fourth pinion 341, and a fourth gear 342. The rotating shaft 343 and the fourth kana 341 are integrally formed. The rotation shaft 343 is provided at the center of the dial 12 in plan view, and is supported by the main plate 61 and the train wheel bridge 64. The fourth pinion 341 meshes with the third gear 332, and the fourth wheel 34 rotates in conjunction with the third wheel 33.

Here, on the dial 12 side of the main plate 61, a minute wheel 71 and an hour wheel 72 (see FIG. 3) provided with rotation shafts (pointer shafts) 712 and 722 at the plane center of the dial 12 in a plan view, An unillustrated sun carriage is provided.
The minute wheel 71 includes a rotary shaft 712, a minute gear 711, and a minute pinion 713 formed integrally with the rotary shaft 712. The minute gear 711 meshes with the third pinion 331, and the minute wheel 71 rotates in conjunction with the third wheel 33. The minute wheel of the minute wheel meshes with the minute pinion 713, and the minute wheel rotates in conjunction with the minute wheel 71. The hour wheel 72 includes a rotating shaft 722 and a cylindrical gear 721 formed integrally with the rotating shaft 722. The cylindrical gear 721 meshes with the pinion of the minute wheel, and the hour wheel 72 rotates in conjunction with the minute wheel.
The minute hand 22 is attached to the rotation shaft 712 of the minute wheel 71, and the hour hand 23 is attached to the rotation shaft 722 of the hour wheel 72.

[Spindle car]
The escape wheel 35 includes a rotation shaft 351, a first escape gear 352 (see FIG. 3), a second escape gear 353 (see FIG. 3), and an escape gear 354. The rotating shaft 351 and the first escaper 352 are integrally formed. The rotation shaft 351 is provided on the 6 o'clock side with respect to the plane center of the dial 12 in plan view, and is supported by the main plate 61 and the train wheel bridge 64. The first escape gear 352 meshes with the fourth gear 342, and the escape wheel 35 rotates in conjunction with the fourth wheel 34.

[Uncle and balance]
As shown in FIGS. 2 and 4, the ankle 37 includes two claw stones that mesh with the escape gear 354, and controls the rotational speed of the escape wheel 35 by feeding the escape gear 354 according to the rotational reciprocation of the balance 38. To do. Thereby, the rotational speeds of the barrel wheel 31, the second wheel 32, the third wheel 33, the fourth wheel 34, and the small second wheel 36 are controlled.
The timepiece 1 includes a regulation lever 81 (see FIG. 2). When the time is adjusted, the regulation lever 81 abuts on the balance of the balance 38, and the movement of the balance 38 is regulated. The regulating lever 81 engages with a pinion wheel 43 (described later) attached to the winding stem 41 and rotates in conjunction with the movement of the pinion wheel 43 in the winding stem axis direction. When the winding lever 41 is pulled in two steps from the state in which the winding stem 41 is pushed in the center direction of the movement 2 (0 step position) and the time can be adjusted, the regulating lever 81 contacts the tenwa.

[Small second wheel]
As shown in FIGS. 2 and 4, the small second wheel 36 includes a rotation shaft (pointer shaft) 361 to which the small second hand 21 is attached and a small second gear 362.
The rotation shaft 361 is on the 6 o'clock side with respect to the plane center of the dial 12 in plan view, and is provided on the opposite side of the plane center side of the dial 12 with respect to the rotation shaft 351 of the escape wheel 35. Yes. Further, the back cover side of the rotating shaft 361 is pivotally supported by the winding stem holder 62, the dial plate 12 side of the rotating shaft 361 is pivotally supported by the base plate 61, and the tip protrudes toward the dial plate 12 side of the base plate 61. .
The small second gear 362 meshes with the second escape wheel 353, and the small second wheel 36 rotates in conjunction with the escape wheel 35. Here, the small second wheel 36 rotates at the same speed as the fourth wheel & pinion 34.

[Manual hoisting mechanism]
As shown in FIGS. 2 and 5, the manual hoisting mechanism 40 includes a winding stem 41, a chime wheel 42, a clutch wheel 43, a round hole wheel 44, square hole transmission wheels 45, 46, 47, and a square hole wheel 48. I have. Here, the chichi wheel 42, the pinion wheel 43, the round hole wheel 44, and the square hole transmission wheels 45 to 47 constitute a manual winding wheel train that rotates the square hole wheel 48 in conjunction with the rotation of the winding stem 41. .
The winding stem 41 is provided between the main plate 61 and the winding stem receiver 62 and the winding receiver 63. The chichi wheel 42, the pinion wheel 43, and the round hole wheel 44 are provided between the main plate 61 and the hoisting receiver 63.
The pinion wheel 43 is provided with a square hole passing through the center of rotation, and a winding stem 41 is inserted through this hole. Thereby, the pinion wheel 43 rotates integrally with the winding stem 41.
The chisel wheel 42 is provided with a circular hole that passes through the center of rotation, and a winding stem 41 is rotatably inserted into the hole. When the winding stem 41 is in the 0-step position, the chimney wheel 42 meshes with the pinion wheel 43 and rotates in conjunction with the pinion wheel 43.
The round hole wheel 44 meshes with the chi-wheel 42 and rotates in conjunction with the chi-chi wheel 42.

The square hole transmission wheels 45 to 47 and the square hole wheel 48 are provided between the hoisting receiver 63 and the wheel train receiver 64. The dial 12 side of the square hole transmission wheel 45 is pivotally supported by a hoisting receiver 63. The back cover side of the square hole transmission wheels 46 and 47 is pivotally supported by a train wheel bridge 64.
The square hole transmission wheels 45, 46 and 47 rotate in conjunction with the round hole wheel 44 and rotate the square hole wheel 48. When the square hole wheel 48 rotates, the barrel complete 311 rotates together with the square hole wheel 48 and the mainspring is wound up.
According to such a manual hoisting mechanism 40, the user can wind up the mainspring by rotating the crown 14 attached to the tip of the winding stem 41.

[Automatic hoisting mechanism]
FIG. 7 is a plan view of the main part of the movement 2. 2, 6, and 7, the automatic hoisting mechanism 50 includes a rotating weight 51 (see FIG. 6), a bearing 52 (see FIGS. 6 and 7), an eccentric wheel 53, a claw lever 54, and a transmission wheel. 55. Here, the eccentric wheel 53, the claw lever 54, and the transmission wheel 55 constitute an automatic hoisting wheel train that rotates the square hole wheel 48 in conjunction with the rotating weight 51.
The bearing 52 has a rotational axis provided at the center of the dial 12 in plan view. The bearing 52 is provided on the back cover side of the train wheel bridge 64 and is pivotally supported by the train wheel bridge 64.
The rotary weight 51 has a semicircular shape centering on the rotation axis of the bearing 52 in plan view (see FIG. 8). The rotary weight 51 is provided on the back cover side of the train wheel bridge 64 and is attached to the outer ring 521 of the bearing 52. As a result, the outer ring 521 rotates integrally with the rotary weight 51.

The eccentric wheel 53 includes an eccentric shaft member 532 and an eccentric gear 531 attached to the eccentric shaft member 532. The eccentric shaft member 532 is provided on the 4 o'clock side with respect to the plane center of the dial 12 in plan view. The eccentric shaft member 532 is inserted through a hole provided in the hoisting receiver 63, the dial 12 side is pivotally supported by the winding stem receiver 62, and the back cover side is pivotally supported by the train wheel bridge 64.
Further, the eccentric shaft member 532 includes an eccentric shaft 532A that is eccentric from the rotation shaft 532B. A claw lever 54, which will be described later, is rotatably attached to the eccentric shaft 532A.
The eccentric gear 531 is provided between the winding receiver 63 and the wheel train receiver 64 in the axial direction. The eccentric gear 531 meshes with a rotary weight pinion 522 provided on the outer periphery of the outer ring 521 of the bearing 52, and the eccentric wheel 53 rotates in conjunction with the rotary weight 51. Thereby, the eccentric shaft 532A revolves around the rotation shaft 532B of the eccentric wheel 53, and the claw lever 54 attached to the eccentric shaft 532A moves forward and backward in a direction approaching and moving away from the transmission wheel 55. Note that the stroke of the forward / backward movement of the pawl lever 54 is twice as long as the distance between the center of the rotating shaft 532B and the center of the eccentric shaft 532A.

The claw lever 54 is provided between the hoisting receiver 63 and the train wheel receiver 64 and is rotatably attached to the eccentric shaft 532A. The dial 12 side of the claw lever 54 is supported by a hoisting receiver 63.
As shown in FIG. 7, the claw lever 54 has a base end portion 541 having a hole through which the eccentric shaft 532A is inserted, and a pulling claw that extends from the base end portion 541 and sandwiches the transmission gear 551 of the transmission wheel 55 in a plan view. A lever portion 542 and a push claw lever portion 543 are provided. Here, in plan view, the distance between the pull claw lever portion 542 and the push claw lever portion 543 increases as the distance from the base end portion 541 increases.

The pulling claw lever portion 542 includes an extended portion 542A that extends linearly from the base end portion 541, a curved portion 542B that is continuous with the extended portion 542A and is curved along the outer periphery of the transmission gear 551 in a plan view, A pulling claw 542C that protrudes from the tip of the curved portion 542B toward the transmission gear 551 and engages with the transmission gear 551 is provided.
The push claw lever portion 543 includes an extended portion 543A that extends linearly from the base end portion 541, a curved portion 543B that is continuous with the extended portion 543A, and is curved along the outer periphery of the transmission gear 551 in a plan view. A push claw 543C that protrudes from the tip of the curved portion 543B toward the transmission gear 551 and engages with the transmission gear 551 is provided.
Examples of the material of the claw lever 54 include carbon tool steel (for example, SK-5, SK-4).

As shown in FIGS. 2, 6, and 7, the transmission wheel 55 includes a rotation shaft 553, a transmission gear 551, and a transmission hook 552. The rotating shaft 553 and the transmission kana 552 are integrally formed.
The rotation shaft 553 is provided on the 2 o'clock side with respect to the plane center of the dial 12 in a plan view, and is supported by a hoisting receiver 63 and a train wheel receiver 64.
A pulling claw 542C and a pushing claw 543C of the claw lever 54 are engaged with the transmission gear 551, and the transmission wheel 55 rotates in one direction in conjunction with the forward / backward movement of the claw lever 54. The square hole wheel 48 rotates in conjunction with the transmission wheel 55. When the square hole wheel 48 rotates, the barrel complete 311 rotates together with the square hole wheel 48 and the mainspring is wound up.
According to such an automatic hoisting mechanism 50, for example, the mainspring can be wound up by swinging the arm and rotating the rotary weight 51 while the user wears the timepiece 1 on the arm.

[Configuration of through hole of train wheel bridge]
As shown in FIG. 2, the train wheel bridge 64 overlaps with the automatic winding train wheel in a plan view, and has a circular shape in a plan view at a position corresponding to the claw lever 54 as shown in FIGS. Two through holes 641 (first through holes) and through holes 642 (second through holes) are provided. Although described later in detail, an operation pin for releasing the engagement between the claw lever 54 and the transmission wheel 55 is inserted into the through holes 641 and 642. That is, the through holes 641 and 642 correspond to release portions for releasing the engagement.

FIG. 7 shows a state in which the pawl lever 54 is at the position closest to the transmission wheel 55 (approach position) in the movable range in the forward / backward movement. That is, the distance D1 between the eccentric shaft 532A of the eccentric wheel 53 and the rotation shaft 553 of the transmission wheel 55 is the shortest. In this state, the operation pin is inserted into the through holes 641 and 642.
When the claw lever 54 is located at the approach position, as shown in FIG. 7, in the plan view, the opening 641A on the dial 12 side of the through hole 641 is partially on the curved portion 542B side in the extending portion 542A. The remaining portion is located on the push claw lever portion 543 side of the end portion. Further, in the plan view, the center of the opening 641A is located on the push claw lever portion 543 side of the end portion.
Here, the area of the extended portion 542A that overlaps the opening 641A can escape in a direction perpendicular to the insertion direction of the operation pin by bending the pulling claw lever portion 542 even if the operation pin hits the portion. Set as much as possible.

On the other hand, the opening 642A on the dial 12 side of the through hole 642 partially overlaps the end of the extended portion 543A on the curved portion 543B side, and the remaining portion is positioned on the pulling claw lever portion 542 side of the end. ing. In plan view, the center of the opening 642A is located on the pulling claw lever portion 542 side of the end portion.
Here, the area of the extended portion 543A that overlaps the opening 642A can escape in a direction perpendicular to the insertion direction of the operation pin by bending the push-claw lever portion 543 even if the operation pin hits the portion. Set as much as possible.

  The diameters of the openings 641A and 642A are approximately the same as the diameter of the operation pin. The diameter of the opening 641B on the back cover side of the through hole 641 is larger than the diameter of the opening 641A, and the diameter of the opening 642B on the back cover side of the through hole 642 is larger than the diameter of the opening 642A.

[Positional relationship between claw lever moving forward and backward and through hole]
In the present embodiment, as shown in FIG. 8, when the rotary weight 51 is positioned on the 9 o'clock side, the eccentric shaft 532 </ b> A is closest to the rotary shaft 553 of the transmission wheel 55. At this time, as shown in FIG. 7, the opening 641 </ b> A partially overlaps with the pulling claw lever portion 542 and the opening 642 </ b> A partially overlaps with the pushing claw lever portion 543 in the plan view.
Next, as shown in FIG. 9, when the rotary weight 51 rotates 90 degrees clockwise as viewed from the back cover side and moves toward the 6 o'clock side, the eccentric shaft 532A is centered on the rotational shaft 532B of the eccentric wheel 53. And rotate 90 degrees counterclockwise. As a result, the claw lever 54 moves away from the transmission wheel 55. At this time, the opening 641A does not overlap with the pulling claw lever portion 542 in a plan view, and a part of the opening 642A overlaps with the pushing claw lever portion 543.

Next, as shown in FIG. 10, when the rotary weight 51 further rotates 90 degrees clockwise and moves toward the 3 o'clock direction, the eccentric shaft 532 </ b> A is further counteracted around the rotational shaft 532 </ b> B of the eccentric wheel 53. Rotate 90 degrees clockwise. In this case, the eccentric shaft 532A is furthest away from the rotation shaft 553 of the transmission wheel 55. At this time, the opening 641A does not overlap the pulling claw lever portion 542 and the opening 642A does not overlap the pushing claw lever portion 543 in plan view.
Next, as shown in FIG. 11, when the rotating weight 51 further rotates 90 degrees clockwise and moves toward the 12 o'clock direction, the eccentric shaft 532A is further countered around the rotating shaft 532B of the eccentric wheel 53. Rotate 90 degrees clockwise. Thereby, the claw lever 54 approaches the transmission wheel 55. At this time, the opening 641A partially overlaps with the pulling claw lever portion 542 and the opening 642A does not overlap with the pushing claw lever portion 543 in plan view.
Then, when the rotating weight 51 further rotates 90 degrees clockwise and moves toward the 9 o'clock direction, the state shown in FIG. 8 is restored.

That is, the distance between the pulling claw lever portion 542 and the pushing claw lever portion 543 increases as the distance to the transmission wheel 55 increases. Therefore, when the claw lever 54 is located at a position other than the approaching position (the state shown in FIGS. In the plan view, the area overlapping the opening 641A of the pulling claw lever portion 542 and the area overlapping the opening 642A of the pushing claw lever portion 543 are larger than when the claw lever 54 is located at the approach position. There is nothing.
For this reason, even when the operation pin is inserted into the through holes 641 and 642 when the claw lever 54 is located at a position other than the approach position, it is possible to suppress the claw lever 54 from being deformed by being pushed by the operation pin. That is, even if the operation pin does not hit the claw lever 54, or even if the operation pin hits the claw lever, the claw lever 54 can move so as to bend and escape.

[Claw lever disengagement method]
In the movement 2, in order to release the engagement between the claw lever 54 and the transmission wheel 55, first, the rotary weight 51 is moved to the 9 o'clock side, and as shown in FIGS. Is exposed to the back cover side, and the claw lever 54 is disposed at a position closest to the transmission wheel 55.
Next, an operation pin (operation member) having a round tip is inserted into the through holes 641 and 642 from the back cover side. When the operation pin is inserted into the through hole 641, the tip of the operation pin hits the extending portion 542A. When the operation pin is further inserted, the extending portion 542A slides at the tip of the operation pin, and bends and moves to the side opposite to the push claw lever portion 543 in the plan view. That is, it moves in a direction away from the transmission gear 551. Thereby, the engagement between the pulling claw 542C and the transmission gear 551 is released.
When the operation pin is inserted into the through hole 642, the tip of the operation pin hits the extending portion 543A. When the operation pin is further inserted, the extending portion 543A slides on the tip of the operation pin and bends and moves to the side opposite to the pulling claw lever portion 542 in the plan view. That is, it moves in a direction away from the transmission gear 551. Thereby, the engagement between the push claw 543C and the transmission gear 551 is released.
In this way, the engagement between the claw lever 54 and the transmission gear 551 can be released.

[How to unwind the mainspring]
When unwinding the mainspring in the movement 2, first, the crown 14 is fixed with a finger, and the rotation of the square wheel 48 is restricted.
Then, with the rotation of the square wheel 48 restricted, the engagement between the claw lever 54 and the transmission wheel 55 is released by the claw lever disengagement method.
Then, in a state where the engagement is released, the crown 14 is rotated in a direction opposite to the winding direction. Thereby, the square wheel 48 is rotated in the direction opposite to the winding direction, and the mainspring is unwound to a predetermined position.
Instead of operating the crown 14, the rotation of the square hole wheel 48 may be restricted or rotated by fixing the square hole screw with a screwdriver or turning the square hole screw.

[Effects of Embodiment]
According to the timepiece 1, the engagement between the claw lever 54 and the transmission wheel 55 can be released without removing the train wheel bridge 64. For this reason, for example, the work can be simplified compared with the case where the train wheel bridge 64 is removed and the automatic hoisting mechanism 50 is disassembled to release the engagement. Further, the engagement can be released without removing the movement 2 from the case.
Further, since the engagement between the claw lever 54 and the transmission wheel 55 can be released simply by inserting the operation pin into the through holes 641 and 642, the operation can be further simplified.
Further, since the openings 641B and 642B on the back cover side of the through holes 641 and 642 are larger than the diameter of the operation pins, the operation pins can be easily inserted into the through holes 641 and 642.

  When unwinding the mainspring to a predetermined position, there is no need to remove the train wheel bridge 64, so there is no need to provide a part for restricting the rotation of the square wheel 48 such as a corkscrew. That is, when the train wheel bridge 64 is removed, the automatic hoisting mechanism 50 is disassembled, and the rotation of the square wheel 48 is not restricted by the automatic hoisting mechanism 50. For this reason, the square wheel 48 rotates in the direction opposite to the winding direction, and the mainspring is completely unwound. In order to regulate this, a component such as a koji that prevents the square wheel 48 from rotating in the direction opposite to the winding direction is required. According to the timepiece 1, it is not necessary to remove the train wheel bridge 64 when unwinding the mainspring to a predetermined position, so that it is not necessary to provide the parts. For this reason, cost can be reduced and the assembly process of the movement 2 can also be simplified.

Since the release portion can be provided simply by forming the through holes 641 and 642 in the train wheel bridge 64, the movement 2 can be easily manufactured.
Even when the operation pin is inserted into the through holes 641 and 642 when the claw lever 54 is located at a position other than the approach position, it is possible to suppress the claw lever 54 from being deformed by being pushed by the operation pin.
The mainspring can be unwound by rotating the winding stem 41 in the direction opposite to the winding direction in a state where the engagement of the claw lever 54 and the transmission wheel 55 is released by the operation pin. There is no need to turn the square hole screw with a screwdriver to solve it.

In plan view, the rotation shaft 323 of the second wheel 32 and the rotation shaft 343 of the fourth wheel 34 do not overlap, so the rear cover side of the second wheel 32 and the fourth wheel 34 is connected to the common wheel train 64. Can be pivotally supported. Further, in plan view, since the rotation shaft 343 of the fourth wheel 34 and the rotation shaft 532B of the eccentric wheel 53 do not overlap, the back cover side of the fourth wheel 34 and the eccentric wheel 53 is connected to the common wheel train receiver 64. Can be pivotally supported. Thereby, in the timepiece 1, the basic wheel train and the automatic hoisting wheel train are pivotally supported by one receiving member (wheel train receiver 64) on the back cover side.
For this reason, it is easy to make the movement 2 thinner than in the case where the back cover sides of the basic train wheel and the automatic winding train wheel are pivotally supported by a plurality of receiving members overlapped in the thickness direction. Moreover, since the number of parts can be reduced, the movement 2 can be reduced in weight, or the cost of the movement 2 can be reduced.
Further, compared to the case where the back cover side of the basic train wheel is pivotally supported by a plurality of receiving members, it is less susceptible to the manufacturing variation of the receiving members, and the timepiece accuracy can be improved.

  The minute wheel 71 to which the minute hand (pointer 22) is attached is provided on the dial 12 side with respect to the main plate 61. Therefore, even if the fourth wheel 34 and the minute wheel 71 are provided coaxially, The back cover side can be pivotally supported by a train wheel bridge 64. As a result, in the timepiece 1, the back cover side of the basic wheel train and the self-winding wheel train is pivotally supported by the common wheel train receiver 64, and the pointer shaft of the minute hand is coaxial with the rotating shaft 343 of the fourth wheel 34. Can be provided above.

  Since the back cover side of the square hole transmission wheels 46 and 47 constituting the manual hoisting wheel train is pivotally supported by the train wheel bridge 64, it is compared with the case where it is pivotally supported by a receiving member different from the train wheel bridge 64. The number of receiving members can be reduced.

[Other Embodiments]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

  In the embodiment, the timepiece 1 includes the minute wheel 71 to which the hands 22 (minute hands) are attached, but the present invention is not limited to this. For example, when the pointer shaft of the pointer 22 and the rotation shaft 343 of the fourth wheel & pinion 34 are deviated, the minute wheel 71 may be omitted and the pointer 22 may be attached to the rotation shaft 323 of the second wheel & pinion 32.

  Although the back cover side of the square hole transmission wheels 46 and 47 constituting the manual hoisting wheel train is pivotally supported by the train wheel bridge 64, the present invention is not limited to this. For example, the back cover side of the square hole transmission wheels 46 and 47 may be pivotally supported by a receiving member different from the train wheel bridge 64.

  In the above embodiment, the timepiece 1 includes the small second hand 21, but the present invention is not limited to this. For example, the timepiece may include a second hand attached to the rotation shaft 343 of the fourth wheel 34 instead of the small second hand 21. In this case, the second wheel 36 and the second escape wheel 353 of the escape wheel 35 may be omitted.

  DESCRIPTION OF SYMBOLS 1 ... Clock, 2 ... Movement, 11 ... Exterior case, 12 ... Dial, 14 ... Crown, 30 ... Basic train wheel, 31 ... Candle wheel, 32 ... Second wheel, 33 ... Third wheel, 34 ... Fourth wheel , 35 ... escape wheel, 36 ... small second wheel, 37 ... ankle, 38 ... balance, 40 ... manual hoisting mechanism, 41 ... winding stem, 42 ... chichi car, 43 ... pinwheel, 44 ... round hole car, 45 ... 47 ... Square hole transmission wheel, 48 ... Square hole wheel, 50 ... Automatic hoisting mechanism, 51 ... Rotating weight, 52 ... Bearing, 53 ... Eccentric wheel, 54 ... Claw lever, 55 ... Transmission wheel, 61 ... Ground plate, 62 ... winding stem holder, 63 ... winding receiver, 64 ... train wheel bridge, 71 ... minute wheel, 72 ... cylindrical wheel, 311 ... barrel case, 312 ... barrel box gear, 313 ... barrel holder, 321 ... second kana, 322 ... Second gear, 323, 333, 343, 351, 361, 532B, 553, 712, 722 ... rotating shaft, 3 DESCRIPTION OF SYMBOLS 1 ... 3rd pinion, 332 ... 3rd gear wheel, 341 ... 4th pinion, 342 ... 4th gear wheel, 352 ... 1st escape gear, 353 ... 2nd escape gear, 354 ... escape gear, 362 ... small second gear, 521 ... outer ring 522 ... Rotating spindle, 531 ... Eccentric gear, 532 ... Eccentric shaft member, 532A ... Eccentric shaft, 541 ... Base end, 542 ... Pulling claw lever part, 542A, 543A ... Extension part, 542B, 543B ... Curved part , 542C ... pulling claw, 543 ... push claw lever part, 543C ... push claw, 551 ... transmission gear, 552 ... transmission kana, 641, 642 ... through hole, 641A, 641B, 642A, 642B ... opening, 711 ... minute gear, 713 ... minute kana, 721 ... cylindrical gear, D1 ... distance.

Claims (5)

A basic train wheel comprising a barrel wheel, an escape gear, an escape gear, and a plurality of gears that rotate the escape gear in conjunction with the barrel wheel;
A square hole car,
A rotating weight;
An automatic winding wheel train that rotates the square hole wheel in conjunction with the rotating weight and winds the mainspring;
With the main plate,
A train wheel bridge comprising one receiving member provided between the base plate and the rotating weight,
The basic wheel train and the automatic hoisting wheel train are provided between the main plate and the train wheel bridge in the axial direction, and the rotary weight side is pivotally supported by the wheel train bridge. Watch movement. The timepiece movement according to claim 1,
The basic wheel train includes a second wheel that meshes with the barrel wheel, a third wheel that meshes with the second wheel, and a fourth wheel that meshes with the third wheel and rotates the escaper.
The timepiece movement is provided on the side opposite to the rotating weight side with respect to the main plate, and includes a minute wheel that rotates in conjunction with the second wheel,
In plan view, the rotation shaft of the second wheel and the rotation shaft of the fourth wheel are not overlapped,
The watch movement, wherein the fourth wheel and the minute wheel are provided coaxially. The timepiece movement according to claim 1 or 2,
The automatic winding train is
An eccentric wheel that rotates in conjunction with the rotating weight;
A transmission wheel that rotates the square hole wheel;
A claw lever that is attached to the eccentric wheel, engages with the transmission wheel, and moves forward and backward in a direction approaching and moving away from the transmission wheel in conjunction with rotation of the eccentric wheel,
In a plan view, a timepiece movement characterized in that a rotation shaft of a gear meshing with the escape gear in the basic wheel train does not overlap a rotation shaft of the eccentric wheel. The timepiece movement according to any one of claims 1 to 3,
Winding truth,
In conjunction with the rotation of the winding stem, a manually wound upper wheel train that rotates the square hole wheel,
At least some of the gears of the manual hoisting wheel train are provided between the main plate and the train wheel bridge in the axial direction, and the rotating weight side is pivotally supported by the wheel train bridge. A watch movement. The timepiece movement according to any one of claims 1 to 4,
And a case in which the movement for the timepiece is accommodated.

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