JP6738166B2 - Power reserve mechanism, movement and clock - Google Patents

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 supplies power by gradually rewinding from the fully wound state in which it is fully wound. A mechanical timepiece that uses a mainspring as a power source may have a power reserve mechanism including a display unit that displays the remaining amount of the winding amount (power) of the mainspring (for example, see Patent Document 1). The display portion 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 up, and rotates in the other direction when the mainspring is rewound. In this way, the mechanical timepiece having the power reserve mechanism displays the winding amount 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 in a place other than the central portion on the dial of the timepiece. The arrangement position of the display section of the power reserve mechanism is determined by the relationship with other display sections. Therefore, 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 has to be arranged in a limited movement space, and in some cases, cannot be arranged.

Therefore, the present invention provides a power reserve mechanism, a movement and a timepiece capable of effectively utilizing the space of the movement and improving the degree of freedom of arrangement of the display section.

The power reserve mechanism of the present invention is a barrel wheel that accommodates a mainspring, a ratchet wheel that is capable of winding the mainspring, and a unidirectional rotation based on the rotation of the square ratchet wheel when winding the mainspring. , A gear wheel that rotates in the other direction based on the rotation of the barrel wheel at the time of rewinding the mainspring, and a winding wheel attached with a pointer and connected to the gear wheel. It is arranged coaxially with the attached hour wheel, and is connected to the gear through at least one intermediate wheel.

According to the present invention, since the winding wheel to which the pointer is attached is arranged coaxially with the hour wheel to which the hour hand is attached, the rotation center of the pointer can be arranged coaxially with the rotation center of the hour hand. As a result, the area for rotating the hands can be set to any area around the center of rotation of the hour hand without changing the position of the wheel train including the barrel wheel, the ratchet wheel, the gear wheel, and the winding wheel wheel of the power reserve mechanism. can do. Moreover, since the winding wheel is connected to the gear through at least one intermediate wheel, the winding wheel and the gear connected to the winding wheel are appropriately set by appropriately setting the number, size, position, etc. of the intermediate wheels. The diameter of can be reduced. Further, since the rotation range of the pointer attached to the winding wheel can be adjusted by appropriately changing the reduction ratio of the intermediate wheel, the size of the display section including the pointer of the power reserve mechanism can be adjusted. Therefore, it is possible to provide a power reserve mechanism capable of effectively utilizing the movement space and improving the degree of freedom in disposing the display unit.
Furthermore, since the center of rotation of the pointer can be arranged coaxially with the center of rotation of the hour hand, the pointer can be formed longer than the configuration in which the center of rotation of the pointer is displaced from the center of rotation of the hour hand. Thereby, the visibility of the display portion of the power reserve mechanism can be improved.

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

According to the present invention, since the winding wheel can rotate without sliding contact with the hour wheel, it is possible to prevent the winding wheel from rotating with the rotation of the hour wheel. Therefore, the winding amount of the mainspring can be displayed more accurately.

In the above power reserve mechanism, it is preferable that the winding wheel is biased 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 wheel is biased by the needle seat so as to be separated from the hour wheel, the winding wheel can have a gap with respect to the hour wheel. Therefore, it is possible to reliably prevent the winding wheel from being rotated along with the rotation of the hour wheel, and it is possible to more accurately display the winding amount of the mainspring.

A movement of the present invention is characterized by including the above power reserve mechanism.

According to the present invention, since the power reserve mechanism capable of effectively utilizing the space of the movement is provided, the movement can be designed with a high degree of freedom.

A timepiece of the invention is characterized by including the above-mentioned movement.

According to the present invention, it is possible to provide a timepiece capable of displaying the winding amount of the mainspring.

According to the present invention, it is possible to provide a power reserve mechanism capable of effectively utilizing the movement space and improving the degree of freedom in disposing the display unit.

It is a top view of the timepiece which concerns on embodiment. It is a front side plan view of the movement according to the embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. 2. 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 an embodiment.
As shown in FIG. 1, a timepiece 1 is a mechanical timepiece, and includes a movement case 5 and a dial 11 having a scale or the like indicating time-related information in a timepiece case 3 composed of a case back and glass 2 not shown. And are equipped with. Between the dial 11 and the glass 2, an hour hand 4a indicating the hour, a minute hand 4b indicating the minute and a second hand 4c 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 main plate 71 forming the substrate of the movement 5, and the case back cover (not shown) is the “front side” of the movement 5. (See FIG. 3).

Further, on the dial 11, a date display section 12 for displaying the date and a display section 15 of the power reserve mechanism 20 described later are provided. The date display unit 12 has a circular scale 13 provided at the 6 o'clock position on the dial 11, and a date display hand 14 rotatably arranged at the center of the scale 13. This allows the clock 1 to confirm the date in addition to the time. It should be noted that in FIG. 1, only a part of the date on the scale 13 is shown on the date display portion 12. The display unit 15 of the power reserve mechanism 20 has a fan-shaped scale 16 provided over an angle range from 1 o'clock to 5 o'clock about the center axis O, and a rotation within the range of the scale 16 about the center axis O as a rotation center. And a pointer 17 movably provided.

The timepiece 1 also includes a winding stem 6. The winding stem 6 is, for example, a timepiece component used for correcting the date and the time display (display of the hour and minute). 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 cross-sectional view taken along the line III-III of FIG.
As shown in FIGS. 2 and 3, the movement 5 has a base plate 71. On the front side of the main plate 71, an escape/governing mechanism (not shown) including a balance wheel, escape wheel, pallet fork, etc., a fourth wheel 43, a third wheel (not shown), a second wheel 41 and a barrel wheel 21 are provided. At least the front train wheel including the wheel train is arranged. At least the back train wheel including the cannon pinion 45 and the hour wheel 47 is arranged on the back side of the main plate 71.

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

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

The center wheel & pinion 41 is rotatably supported about the central axis O by a main plate 71 and a second bridge 74 arranged between the main plate 71 and the first bridge 73. The center wheel & pinion 41 has a hollow shaft section 41a and a second gear 41b fixed to the shaft section 41a. The second gear 41b is connected to the barrel wheel 21d of the barrel wheel 21.

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

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

The hour wheel 47 is arranged coaxially with the center wheel & pinion 41. The hour wheel 47 has a hollow shaft portion 47a, a hour wheel gear 47b provided at the front end of the hour wheel portion 47a, and a hour wheel pinion 47c disposed on the back side of the hour wheel gear 47b. The shaft portion 47 a is rotatably fitted on the tubular pinion 45. Movement of the hour wheel 47 in the axial direction is restricted by a main plate 71 and a second main plate 72 arranged on the back side of the main plate 71. The hour wheel 4 a is attached to the hour wheel 47.

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

The timepiece 1 also includes a date driving mechanism 50, a calendar correction mechanism 60, and a power reserve mechanism 20. The date driving mechanism 50 is a train wheel that is incorporated in the movement 5 and drives the date indicating hand 14 (see FIG. 1) described above. The date indicator driving wheel 51 rotates once in 24 hours, and the date indicator driving wheel 52 feeds the date star wheel 53 by one tooth for each rotation. The date star wheel 53 is urged by a date jumper 54. The calendar correction mechanism 60 is a calendar correction train wheel that is incorporated in the movement 5 and corrects the date. One end of a date correction lever 62 is held by the first day correction transmission wheel 61 with a light force, and is swingably attached to the rotation shaft of the first day correction transmission wheel 61. A second date correction transmission wheel 63 is rotatably attached to the other end of the date correction lever 62. The date correction lever 62 swings to correct the date at the position where the second date correction transmission wheel 63 meshes with the date correction wheel 64. The power reserve mechanism 20 displays the winding amount of the mainspring 22. The power reserve mechanism 20 includes the above-described display unit 15 and a train wheel incorporated in the movement 5 and driving the pointer 17.

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

The square wheel & pinion 23 is connected to a manual winding wheel train and an automatic winding wheel train. The ratchet wheel 23 is fixed to the barrel 21a and rotates to wind up the mainspring 22 housed in the barrel 21.

The planetary transmission wheel 25 is rotatably supported by a main plate 71 and a second train wheel bridge 75 arranged on the back side of the second main plate 72. The planetary transmission wheel 25 has a planetary transmission pinion 25a and a planetary transmission gear 25b. The planet transmission kana 25a is in mesh with the barrel sword 21a. As a result, the planet 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 pinion 25a.

The first sun wheel 27 is rotatably supported by the main plate 71 and the second train wheel bridge 75. The first sun wheel 27 has a sun true 27a, a first sun gear 27b, and a first sun pinion 27c. The first sun gear 27b is attached to the sun true 27a and meshes with the barrel 21c. As a result, the first sun wheel 27 rotates based on the rotation of the barrel barrel 21c.

The second sun wheel 29 is arranged coaxially with the first sun wheel 27 and is rotatably externally attached to the sun arbor 27a. The second sun wheel 29 has a second sun gear 29a and a second sun pinion 29b.

The planetary unit 30 has 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 fitted to 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 31b is formed at an eccentric position of the planetary intermediate wheel 31. The planetary wheel 32 has a planetary gear 32a, a planetary gear 32b, and a planetary pinion 32c. The planetary stem 32a is rotatably inserted in the bearing hole 31b of the planetary intermediate wheel 31. The planetary gear 32b is mounted on the planetary gear 32a on the front side of the planetary intermediate wheel 31, and meshes with the first sun pinion 27c. The planetary pinion 32c is mounted on the planetary gear 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 main plate 72 and the second train wheel bridge 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. As a result, the first winding mark intermediate wheel 33 rotates based on the rotation of the second sun wheel 29.

The second winding mark intermediate wheel 35 is rotatably supported by the second main plate 72 and the second train wheel bridge 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 wheel 37 is arranged coaxially with the hour wheel 47 and is rotatably supported by the second train wheel bridge 75. The winding wheel 37 is in contact with the second train wheel bridge 75 from the front side. The winding mark wheel 37 has a hollow winding mark stem 37a and a winding mark gear 37b provided at the front end of the winding mark stem 37a. The shaft 47a of the hour wheel 47 is inserted inside the winding stem 37a with a gap. The winding mark gear 37b meshes with the second winding mark intermediate gear 35a. As a result, the winding wheel 37 rotates based on the rotation of the second winding intermediate wheel 35.

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

The operation of the power reserve mechanism 20 of this embodiment will be described below.
When winding the mainspring 22, the square hole wheel 23 is rotated to rotate the barrel complete 21a of the barrel wheel 21 in one direction. As a result, the barrel transmission pinion 21b rotates, and the planet transmission wheel 25 having the planet transmission pinion 25a engaging with the barrel connection pinion 21b rotates. The barrel 21c does not rotate when the mainspring 22 is wound up.

When the planet transmission wheel 25 rotates, the planet intermediate wheel 31 having the planet intermediate gear 31a that meshes with the planet transmission gear 25b rotates. The planet wheel 32 revolves with the rotation of the planet intermediate wheel 31. At this time, since the barrel pin 21c is not rotating, the first sun wheel 27 having the first sun gear 27b that meshes with the barrel pin 21c is not rotating. Therefore, the planetary wheel 32 having the planetary gear 32b that meshes with the first sun pinion 27c performs revolution and rotation at the same time. When the planet wheel 32 revolves and rotates at the same time, the second sun wheel 29 having the second sun gear 29a that meshes with the planet pinion 32c rotates.

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

When the mainspring 22 is rewound, the barrel pin 21c rotates in the other direction. When the mainspring 22 is rewound, the barrel complete 21a does not rotate. When the barrel pin 21c rotates, the first sun wheel 27 having the first sun gear 27b that meshes with the barrel pin 21c rotates. When the first sun wheel 27 rotates, the planet wheel 32 having the planetary gear 32b that meshes with the first sun pinion 27c rotates. At this time, since the barrel barrel 21c is not rotating, the planetary intermediate wheel 31 connected to the barrel barrel 21c via the planet transmission wheel 25 is not rotating. Therefore, the planet wheel 32 does not revolve but only rotates. When the planet wheel 32 rotates, the second sun wheel 29 having the second sun gear 29a that meshes with the planet pinion 32c rotates in the direction opposite to that when the mainspring 22 is wound.

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

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 winding amount of the mainspring 22. ..

As described in detail above, the power reserve mechanism 20 of the present embodiment has a structure in which the winding wheel 37 is arranged coaxially with the hour wheel 47.
According to this structure, since the winding 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, the winding wheel 37 is coaxial with the rotation center (central axis O) of the hour hand 4a. 17 rotation centers can be arranged. As a result, the region in which 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 near the 3 o'clock position, but by changing the attachment angle of the pointer 17 to the winding 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 sun 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 can be changed. By appropriately setting, the diameters of the winding wheel 37 and the second sun wheel 29 connected to the winding wheel 37 can be reduced. Further, by appropriately changing the reduction ratios 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 capable of effectively utilizing the space of the movement 5 and improving 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 center 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 displaced from the center axis O. Thereby, the visibility of the display unit 15 of the power reserve mechanism 20 can be improved.

Further, since the winding indicator wheel 37 is arranged with a gap with respect to the hour wheel 47 and is rotatably supported by the second train wheel bridge 75, the winding wheel wheel 37 rotates without sliding contact with the hour wheel 47. it can. Therefore, it is possible to prevent the winding wheel 37 from rotating with the rotation of the hour wheel 47. Therefore, the power reserve mechanism 20 can display the winding amount of the mainspring 22 more accurately.

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

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

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 timepiece 1 is a self-winding wristwatch, but the invention is not limited to this, and may be a manual winding timepiece with a winding stem 6.

In the above embodiment, the winding wheel 37 is connected to the second sun wheel 29 via two intermediate wheels (the first winding intermediate wheel 33 and the second winding intermediate wheel 35). , But is not limited to this. The winding wheel may be configured to be connected to the second sun wheel via at least one intermediate wheel. By changing the number of intermediate wheels, the rotation direction of the winding wheel can be appropriately changed, so that the rotation direction of the pointer can be set arbitrarily.

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

1... Clock 4a... Hour hand 5... Movement 17... Pointer 20... Power reserve mechanism 21... Outer barrel wheel 22... Mainspring 23... Square hole wheel 29... Second sun wheel (gear) 33... First winding intermediate wheel (intermediate wheel) 35... Second winding mark intermediate car (intermediate car) 37... Winding mark car 39... Needle seat 47... Cylinder wheel 75... Second wheel train bridge (wheel train bridge)

Claims (4)

A barrel car containing a mainspring,
A square hole wheel provided so that the mainspring can be wound up,
A gear that rotates in one direction based on the rotation of the square hole wheel when winding the mainspring, and rotates in the other direction based on the rotation of the barrel wheel when rewinding the mainspring,
A winding wheel attached with a pointer and connected to the gear,
Equipped with
The winding wheel is arranged coaxially with the hour wheel to which the hour hand is attached, and is connected to the gear through at least one intermediate wheel ,
The power reserve mechanism , wherein the winding wheel is arranged with a gap from the hour wheel and is rotatably supported by a train wheel bridge . The winding wheel is biased 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 1 , wherein: A movement comprising the power reserve mechanism according to claim 1 or 2 . A timepiece comprising the movement according to claim 3 .

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