JP2017161327A - Power reserve mechanism, movement, and timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power reserve mechanism capable of effectively using a space of a movement, and improving the layout flexibility of a display portion.SOLUTION: A power reserve mechanism 20 is equipped with a barrel wheel 21 storing a spiral spring 22; a square hole wheel 23 provided so as to wind up the spiral spring 22; a second sun wheel 29 which rotates in one direction on the basis of rotations of the square hole wheel 23 when the spiral spring 22 is wound up, and rotates in another direction on the basis of rotations of the barrel wheel 21 when the spiral spring 22 is wound back; and a winding wheel 37 to which a hand 17 is attached, and which is coupled to the second sun wheel 29. The winding wheel 37 is coaxially disposed with a scoop wheel 47 attached with an hour hand 4a, and is coupled to the second sun wheel 29 through a first winding intermediate wheel 33 and a second winding intermediate wheel 35.SELECTED DRAWING: Figure 3

Description

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

  Conventionally, a mechanical timepiece has a mainspring as a power source. The mainspring is powered by gradually rewinding from the fully wound state. A mechanical timepiece using a mainspring as a power source may have a power reserve mechanism including a display unit that displays the remaining amount of the mainspring winding (power) (for example, see Patent Document 1). The display unit of the power reserve mechanism includes a pointer that rotates within a predetermined angle range. The pointer rotates in one direction when the mainspring is wound, and rotates in the other direction when the mainspring is unwound. In this way, the mechanical timepiece having the power reserve mechanism displays the amount of winding of the mainspring.

JP 2000-98056 A

  By the way, a display unit other than the power reserve mechanism, such as a date display unit for displaying the date, may be arranged at a place other than the central part on the dial of the watch. The arrangement position of the display unit of the power reserve mechanism is determined by the relationship with other display units. For this reason, the power reserve mechanism needs to appropriately set the position of the train wheel in relation to the position of the display unit. As a result, the train wheel of the power reserve mechanism must be arranged in a limited movement space, and may not be arranged in some cases.

  Therefore, the present invention provides a power reserve mechanism, a movement, and a timepiece that can effectively use the space of the movement and can improve the degree of freedom of arrangement of the display unit.

  The power reserve mechanism of the present invention includes a barrel wheel housing a mainspring, a square hole wheel provided to wind up the mainspring, and rotating in one direction based on the rotation of the square hole wheel when the mainspring is rolled up. A main gear that rotates in the other direction based on the rotation of the barrel wheel when the mainspring is unwound, and a winding mark wheel that is attached to the gear and is connected to the gear. It is arranged coaxially with the attached hour wheel, and is connected to the gear via at least one intermediate wheel.

According to the present invention, the winding mark wheel to which the pointer is attached is arranged coaxially with the hour wheel to which the hour hand is attached. Therefore, the rotation center of the pointer can be arranged coaxially with the rotation center of the hour hand. As a result, the region where the pointer is rotated can be set to any region around the rotation center of the hour hand without changing the position of the wheel train including the barrel wheel, the square hole wheel, the gear and the winding wheel of the power reserve mechanism. can do. In addition, since the winding mark wheel is connected to the gear via at least one intermediate wheel, the number of wheels, the size, the position, etc. of the intermediate wheel can be set appropriately so that the winding mark wheel and the gear connected to the wheel are connected. The diameter can be reduced. Moreover, since the rotation range of the pointer attached to the winding mark wheel can be adjusted by appropriately changing the reduction ratio of the intermediate wheel, the size of the display unit including the pointer of the power reserve mechanism can be adjusted. Therefore, it is possible to provide a power reserve mechanism that can effectively use the space of the movement and improve the degree of freedom of arrangement of the display unit.
Further, since the rotation center of the pointer can be arranged coaxially with the rotation center of the hour hand, the pointer can be formed longer than the configuration in which the rotation center of the pointer is provided at a position shifted from the rotation center of the hour hand. Thereby, the visibility of the display part of a power reserve mechanism can be improved.

  In the above power reserve mechanism, it is desirable that the winding mark wheel is disposed with a gap with respect to the hour wheel and is rotatably supported by a train wheel bridge.

  According to the present invention, the winding mark wheel can be rotated without being in sliding contact with the hour wheel, so that it is possible to prevent the winding mark wheel from being accompanied by the rotation of the hour wheel. Therefore, the amount of winding of the mainspring can be displayed more accurately.

  In the power reserve mechanism, it is desirable that the winding mark wheel is urged in the axial direction of the hour wheel by a needle seat so as to be separated from the hour wheel.

  According to the present invention, since the winding mark wheel is urged by the needle seat so as to be separated from the hour wheel, the winding mark wheel can have a gap with respect to the hour wheel. Therefore, it is possible to reliably prevent the winding mark wheel from being accompanied by the rotation of the hour wheel, and to display the amount of winding of the mainspring more accurately.

  A movement according to the present invention is characterized by including the power reserve mechanism described above.

  According to the present invention, since the power reserve mechanism that can effectively use the space of the movement is provided, the movement with a high degree of design freedom can be obtained.

  A timepiece according to the present invention includes the above-described movement.

  ADVANTAGE OF THE INVENTION According to this invention, the timepiece which can display the amount of winding of a mainspring can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, while utilizing the space of a movement effectively, the power reserve mechanism which can improve the arrangement | positioning freedom degree of a display part can be provided.

It is a top view of the timepiece concerning an embodiment. It is a top view of the front side of the movement which concerns on embodiment. It is sectional drawing along the III-III line of FIG. It is a top view which shows the other example of the timepiece which concerns on embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view of a timepiece according to the embodiment.
As shown in FIG. 1, a timepiece 1 is a mechanical timepiece, and has a movement 5 and a dial 11 having a scale indicating time information in a timepiece case 3 including a case back and a glass 2 (not shown). And. Between the dial 11 and the glass 2, an hour hand 4a for indicating the hour, a minute hand 4b for indicating the minute, and a second hand 4c for indicating the second are coaxially arranged on the central axis O. In the following description, the glass 2 side of the watch case 3 is referred to as the “back side” of the movement 5 with respect to the base plate 71 constituting the substrate of the movement 5, and the case back cover (not shown) is the “front side” of the movement 5. (Refer to FIG. 3).

  On the dial 11, a date display unit 12 for displaying the date and a display unit 15 of the power reserve mechanism 20 described later are provided. The date display unit 12 includes a circular scale 13 provided at the 6 o'clock position on the dial 11, and a date display hand 14 that is rotatably arranged at the center of the scale 13. As a result, the timepiece 1 can check the date in addition to the time. In FIG. 1, only a part of the date on the scale 13 is shown on the date display unit 12. The display unit 15 of the power reserve mechanism 20 rotates within a range of the scale 16 with a fan-shaped scale 16 provided over an angular range from 1 o'clock to 5 o'clock with the central axis O as the center, and with the central axis O as the rotation center. And a pointer 17 provided to be movable.

  The timepiece 1 also has a winding stem 6. The winding stem 6 is, for example, a timepiece component used when correcting the date or correcting the time display (hour and minute display). A crown 7 located on the side of the watch case is attached to one end of the winding stem 6.

FIG. 2 is a plan view of the front side of the movement according to the embodiment. FIG. 3 is a sectional view taken along line III-III in FIG.
As shown in FIGS. 2 and 3, the movement 5 has a main plate 71. On the front side of the main plate 71, an escapement and speed control mechanism (not shown) including a balance, an escape wheel, an ankle, etc., a fourth wheel 43, a third wheel (not shown), a second wheel 41 and a barrel wheel 21 are provided. Including at least a front train wheel. On the back side of the main plate 71, at least a back wheel train including the hour pinion 45 and the hour wheel 47 is disposed.

  The timepiece 1 is a so-called self-winding wristwatch, and the mainspring 22 that is a power source of the timepiece 1 is wound up through the automatic winding wheel train by rotating the rotary weight 8 by the movement of the user. The timepiece 1 can also wind the mainspring 22 manually, and the mainspring 22 is wound up via the manual winding wheel train by rotating the crown 7 (see FIG. 1).

  The barrel complete 21 is rotatably supported by a main plate 71 and a first receptacle 73 disposed on the front side of the main plate 71. The barrel complete 21 accommodates the mainspring 22 and is rotated by a rotational torque when the mainspring 22 is rewound. When winding the mainspring 22, the barrel 21b attached to the barrel 21a is rotated in one direction. When the mainspring 22 is rewound, the barrel 21c is rotated in the other direction together with the barrel gear 21d. The barrel complete 21 is connected to an escapement / regulation mechanism (not shown) via a front train wheel.

  The center wheel 41 is supported by a main plate 71 and a second receptacle 74 disposed between the main plate 71 and the first receptacle 73 so as to be rotatable around the central axis O. The center wheel & pinion 41 has a hollow shaft portion 41a and a second gear 41b fixed to the shaft portion 41a. The second gear 41b is connected to the barrel gear 21d of the barrel 21.

  The fourth wheel 43 is disposed coaxially with the second wheel 41. The fourth wheel & pinion 43 has an axle 43a and a fourth gear 43b fixed to the axle 43a. The axle 43a is rotatably inserted into the shaft portion 41a of the center wheel & pinion 41. A second hand 4c is attached to the axle 43a.

  The cylindrical pinion 45 is arranged coaxially with the center wheel & pinion 41. The cylindrical pinion 45 is extrapolated to the shaft portion 41a of the center wheel & pinion 41 so as to be capable of slip rotation. A minute hand 4 b is attached to the cylindrical pinion 45.

  The hour wheel 47 is arranged coaxially with the center wheel & pinion 41. The hour wheel 47 includes a hollow shaft portion 47a, a cylindrical gear 47b provided at the front end portion of the shaft portion 47a, and a hour wheel pinion 47c disposed on the back side of the cylindrical gear 47b. The shaft portion 47a is rotatably inserted into the cylindrical pinion 45. The hour wheel 47 is restricted from moving in the axial direction by the base plate 71 and the second base plate 72 disposed on the back side of the base plate 71. An hour hand 4 a is attached to the hour wheel 47.

  Under such a configuration, when the second wheel 41 rotates, the fourth wheel 43 rotates via the third wheel (not shown), and the second hand 4c attached to the fourth wheel 43 displays “second”. To do. When the center wheel 41 is rotated, the cylindrical pinion 45 lightly press-fitted into the shaft 41a of the second wheel 41 is simultaneously rotated, and the minute hand 4b attached to the cylindrical pinion 45 displays “minute”. Further, based on the rotation of the hour pinion 45, the hour wheel 47 is rotated through the rotation of a minute wheel (not shown), and the hour hand 4a attached to the hour wheel 47 displays “hour”.

  The timepiece 1 also includes a date turning mechanism 50, a calendar correction mechanism 60, and a power reserve mechanism 20. The date turning mechanism 50 is a train wheel that is incorporated in the movement 5 and drives the above-described date indicator hand 14 (see FIG. 1). The date driving wheel 51 makes one rotation in 24 hours, and the date driving wheel 52 sends the date star wheel 53 one tooth for each rotation. The day star wheel 53 is energized by the date jumper 54. The calendar correction mechanism 60 is a calendar correction wheel train that is incorporated in the movement 5 and corrects the date. One end of the date correction lever 62 is sandwiched by the first day correction transmission wheel 61 with a light force, and is attached to the rotation axis of the first day correction transmission wheel 61 so as to be swingable. A second date correction transmission wheel 63 is attached to the other end of the date correction lever 62 so as to freely rotate. The date correction lever 62 swings, and the date is corrected at a position where the second date correction transmission wheel 63 meshes with the date correction wheel 64. The power reserve mechanism 20 displays the amount of winding of the mainspring 22. The power reserve mechanism 20 includes the display unit 15 described above and a train wheel that is incorporated in the movement 5 and drives the hands 17.

  The train wheel of the power reserve mechanism 20 includes the barrel wheel 21, the square hole wheel 23, the planet transmission wheel 25, the first sun wheel 27, the second sun wheel 29 (gear), the planetary unit 30, and the like. A first winding mark intermediate wheel 33, a second winding mark intermediate wheel 35, and a winding mark wheel 37 are provided.

  The square hole wheel 23 is connected to the manual winding wheel train and the automatic winding wheel train. The square hole wheel 23 is fixed to the barrel complete 21a and rotates to wind up the mainspring 22 accommodated in the barrel complete 21.

  The planetary transmission wheel 25 is rotatably supported by a main plate 71 and a second wheel train receiver 75 disposed on the back side of the second main plate 72. The planet transmission wheel 25 has a planet transmission pin 25a and a planet transmission gear 25b. The planetary transmission kana 25a is engaged with the barrel 21b. Thereby, the planetary transmission wheel 25 rotates based on the rotation of the barrel 21a. The planet transmission gear 25b is provided so as to be capable of slip rotation with respect to the planet transmission pin 25a.

  The first sun wheel 27 is rotatably supported by the main plate 71 and the second wheel train receiver 75. The first sun wheel 27 includes a sun true 27a, a first sun gear 27b, and a first sun pinion 27c. The first sun gear 27b is mounted on the sun shaft 27a and meshes with the barrel 21c. Thereby, the 1st sun wheel 27 rotates based on rotation of barrel 21c.

  The second sun wheel 29 is arranged coaxially with the first sun wheel 27, and is extrapolated rotatably on the sun stem 27a. The second sun wheel 29 has a second sun gear 29a and a second sun pinion 29b.

  The planetary unit 30 includes a planetary intermediate wheel 31 and a planetary wheel 32. The planetary intermediate wheel 31 is arranged coaxially with the first sun wheel 27, and is rotatably inserted in the sun true 27a between the first sun gear 27b and the second sun gear 29a. The planetary intermediate wheel 31 has a planetary intermediate gear 31a that meshes with the planetary transmission gear 25b. A bearing hole 31 b is formed at the eccentric position of the planetary intermediate wheel 31. The planetary car 32 has a planetary true 32a, a planetary gear 32b, and a planetary pinion 32c. The planetary truth 32a is rotatably inserted into the bearing hole 31b of the planetary intermediate wheel 31. The planetary gear 32b is attached to the planetary true 32a on the front side of the planetary intermediate wheel 31 and meshes with the first sun pinion 27c. The planetary kana 32c is attached to the planetary true shaft 32a on the back side of the planetary intermediate wheel 31 and meshes with the second sun gear 29a.

  The first winding mark intermediate wheel 33 is rotatably supported by the second base plate 72 and the second wheel train receiver 75. The first winding mark intermediate wheel 33 has a first winding mark intermediate gear 33a. The first winding mark intermediate gear 33a meshes with the second sun pinion 29b. Thereby, the first winding mark intermediate wheel 33 rotates based on the rotation of the second solar wheel 29.

  The second winding mark intermediate wheel 35 is rotatably supported by the second base plate 72 and the second wheel train receiver 75. The second winding mark intermediate wheel 35 has a second winding mark intermediate gear 35a. The second winding mark intermediate gear 35a meshes with the first winding mark intermediate gear 33a. As a result, the second winding mark intermediate wheel 35 rotates based on the rotation of the first winding mark intermediate wheel 33.

  The winding mark wheel 37 is arranged coaxially with the hour wheel 47 and is rotatably supported by a second wheel train receiver 75. The winding mark wheel 37 is in contact with the second wheel train bridge 75 from the front side. The winding mark wheel 37 includes a hollow winding mark 37a and a winding mark gear 37b provided at the front end of the winding mark 37a. The shaft 47a of the hour wheel 47 is inserted through the winding mark 37a with a gap. The winding mark gear 37b meshes with the second winding mark intermediate gear 35a. As a result, the winding mark wheel 37 rotates based on the rotation of the second winding mark intermediate wheel 35.

  The winding wheel 37 is urged in the axial direction of the hour wheel 47 so as to be separated from the hour wheel pinion 47c by being elastically pressed by a needle seat 39 arranged between the hour wheel pinion 47c. ing. Thereby, the winding mark wheel 37 is always in a state of having a gap with respect to the hour wheel 47.

Hereinafter, the operation of the power reserve mechanism 20 of the present embodiment will be described.
When winding the mainspring 22, the square hole wheel 23 is rotated to rotate the barrel 21a of the barrel 21 in one direction. Thereby, the barrel transmission pin 21b rotates, and the planet transmission wheel 25 having the planet transmission pin 25a meshing with the barrel barrel 21b rotates. When the mainspring 22 is wound up, the barrel 21c does not rotate.

  When the planetary transmission wheel 25 rotates, the planetary intermediate wheel 31 having the planetary intermediate gear 31a meshing with the planetary transmission gear 25b rotates. As the planetary intermediate wheel 31 rotates, the planetary vehicle 32 revolves. At this time, since the barrel 21c is not rotating, the first sun wheel 27 having the first sun gear 27b meshing with the barrel 21c is not rotating. For this reason, the planetary wheel 32 having the planetary gear 32b that meshes with the first sun pinion 27c simultaneously performs revolution and rotation. When the planetary wheel 32 performs revolution and rotation at the same time, the second solar wheel 29 having the second sun gear 29a meshing with the planetary pinion 32c rotates.

  When the second sun wheel 29 rotates, the winding wheel 37 rotates clockwise via the first winding mark intermediate wheel 33 and the second winding mark intermediate wheel 35. Accordingly, the pointer 17 is rotated clockwise toward the position where the winding amount of the mainspring 22 on the display unit 15 is maximum.

  When the mainspring 22 is rewound, the barrel 21c rotates in the other direction. Note that the barrel 21a does not rotate when the mainspring 22 is rewound. When the barrel 21c rotates, the first sun wheel 27 having the first sun gear 27b that meshes with the barrel 21c rotates. When the first sun wheel 27 rotates, the planet wheel 32 having the planet gear 32b meshing with the first sun pinion 27c rotates. At this time, because the barrel 21c is not rotating, the planetary intermediate wheel 31 connected to the barrel 21c via the planet transmission wheel 25 is not rotating. For this reason, the planetary car 32 performs only rotation without revolving. When the planetary wheel 32 rotates, the second sun wheel 29 having the second sun gear 29a meshing with the planetary pinion 32c rotates in the direction opposite to that when the mainspring 22 is wound up.

  When the second sun wheel 29 rotates, the winding wheel 37 rotates counterclockwise via the first winding mark intermediate wheel 33 and the second winding mark intermediate wheel 35. As a result, the pointer 17 is rotated counterclockwise in a direction indicating a decrease in the remaining amount of the mainspring 22 wound on the display unit 15.

  In this way, the power reserve mechanism 20 can rotate the pointer 17 around the central axis O between one end and the other end of the scale 16 of the display unit 15 according to the amount of winding of the mainspring 22. .

As described above in detail, the power reserve mechanism 20 of the present embodiment has a configuration in which the winding mark wheel 37 is arranged coaxially with the hour wheel 47.
According to this configuration, the winding mark wheel 37 to which the pointer 17 is attached is arranged coaxially with the hour wheel 47 to which the hour hand 4a is attached. Therefore, the pointer is coaxial with the rotation center (center axis O) of the hour hand 4a. 17 rotation centers can be arranged. As a result, the region where the pointer 17 is rotated can be set to any region around the central axis O without changing the position of the train wheel of the power reserve mechanism 20. Specifically, in the example shown in FIG. 1, the display unit 15 of the power reserve mechanism 20 is provided in the vicinity of the 3 o'clock position, but only by changing the attachment angle of the pointer 17 to the winding mark wheel 37, for example, As in the example shown in FIG. 4, the display unit 15 can be provided at the 9 o'clock position. Moreover, since the winding mark wheel 37 is connected to the second solar wheel 29 via the first winding mark intermediate wheel 33 and the second winding mark intermediate wheel 35, the size and position of each winding mark intermediate wheel 33, 35 are determined. By appropriately setting, the diameters of the winding mark wheel 37 and the second solar wheel 29 connected thereto can be reduced. Further, by appropriately changing the reduction ratio of the first winding mark intermediate wheel 33 and the second winding mark intermediate wheel 35, the rotation range of the pointer 17 attached to the winding mark wheel 37 can be adjusted. The size can be adjusted. Therefore, it is possible to provide the power reserve mechanism 20 that can effectively use the space of the movement 5 and improve the degree of freedom of arrangement of the display unit 15.

  Furthermore, since the rotation center of the pointer 17 can be arranged coaxially with the central axis O, the pointer 17 can be formed longer than the configuration in which the rotation center of the pointer 17 is provided at a position shifted from the central axis O. Thereby, the visibility of the display unit 15 of the power reserve mechanism 20 can be improved.

  In addition, the winding mark wheel 37 is disposed in a state having a gap with respect to the hour wheel 47 and is rotatably supported by the second wheel train receiver 75, so that it rotates without sliding against the hour wheel 47. it can. For this reason, it is possible to prevent the winding mark wheel 37 from being accompanied by the rotation of the hour wheel 47. Therefore, the power reserve mechanism 20 capable of more accurately displaying the amount of winding of the mainspring 22 can be obtained.

  Further, since the winding mark wheel 37 is urged by the needle seat 39 so as to be separated from the hour wheel 47, the winding mark wheel 37 can have a gap with respect to the hour wheel 47. Accordingly, it is possible to reliably prevent the winding mark wheel 37 from being accompanied by the rotation of the hour wheel 47 and to display the amount of winding of the mainspring 22 more accurately.

Since the movement 5 of the present embodiment includes the power reserve mechanism 20 that can effectively utilize the space, the movement 5 having a high degree of design freedom can be obtained.
Since the timepiece 1 of the present embodiment includes the movement 5, the amount of winding of the mainspring 22 can be displayed.

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 timepiece 1 is a self-winding wristwatch, but is not limited thereto, and may be a hand-wound timepiece with a winding stem 6.

  In the above embodiment, the winding mark wheel 37 is connected to the second solar wheel 29 via two intermediate wheels (the first winding mark intermediate wheel 33 and the second winding mark intermediate wheel 35). However, the present invention is not limited to this. The winding wheel may be configured to be connected to the second solar wheel via at least one intermediate wheel. In addition, since the rotation direction of the winding wheel can be changed as appropriate by changing the number of intermediate wheels, the rotation direction of the pointer can be arbitrarily set.

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

  DESCRIPTION OF SYMBOLS 1 ... Clock 4a ... Hour hand 5 ... Movement 17 ... Pointer 20 ... Power reserve mechanism 21 ... Barrel wheel 22 ... Mainspring 23 ... Square hole wheel 29 ... Second sun wheel (gear) 33 ... First winding mark intermediate wheel (intermediate wheel) 35 ... Second winding mark intermediate wheel (intermediate wheel) 37 ... Winding mark wheel 39 ... Needle seat 47 ... Pipe wheel 75 ... Second wheel train receiver (wheel train receiver)

Claims (5)

A barrel complete with a mainspring,
A square hole wheel provided to wind up the mainspring;
A gear that rotates in one direction based on the rotation of the square hole wheel when the mainspring is wound, and rotates in the other direction based on the rotation of the barrel wheel when the mainspring is unwound.
A winding mark wheel attached with a pointer and connected to the gear;
With
The power reserve mechanism is characterized in that the winding mark wheel is disposed coaxially with an hour wheel to which an hour hand is attached and is connected to the gear via at least one intermediate wheel. The winding mark wheel is disposed with a gap with respect to the hour wheel, and is rotatably supported by a train wheel bridge,
The power reserve mechanism according to claim 1. The winding mark wheel is urged in the axial direction of the hour wheel by a needle seat so as to be separated from the hour wheel,
The power reserve mechanism according to claim 2.   A movement comprising the power reserve mechanism according to any one of claims 1 to 3.   A timepiece comprising the movement according to claim 4.

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