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Torque adjustment device, movement and mechanical timepiece

An adjustment device and mechanical technology, which is applied in the field of torque adjustment devices, movement and mechanical clocks and watches, can solve the problems such as the change of the action torque of the escapement, and achieve the effect of inhibiting the change and inhibiting the change of the action torque

Inactive Publication Date: 2015-03-18
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem that the operating torque of the escapement changes when the torque of the mainspring is transmitted to the balance with hairspring

Method used

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  • Torque adjustment device, movement and mechanical timepiece
  • Torque adjustment device, movement and mechanical timepiece
  • Torque adjustment device, movement and mechanical timepiece

Examples

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no. 1 approach

[0043] A first embodiment of the present invention will be described with reference to the drawings.

[0044] The mechanical body including the driving part of the timepiece is called "movement". The dial and hands are attached to the movement, and the finished product is placed in the watch case, which is called the "finished product" of the watch. Of the two sides of the bottom plate constituting the base plate of the timepiece, the side where the glass of the watch case is located, that is, the side where the dial is located is referred to as the "back side", "glass side" or "dial side" of the movement. Of the two sides of the bottom plate, the side where the back cover of the watch case is located, that is, the side opposite to the dial is referred to as the "front side" or "back cover side" of the movement.

[0045] figure 1 It is a plan view of the back side of the finished product of the mechanical timepiece 1 . The finished product of the mechanical timepiece 1 is pro...

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Abstract

The invention relates to a torque adjustment device, a movement and a mechanical timepiece which can restrain the change of movement torque of an escape device. The torque adjustment device comprises a torque adjustment clockwork spring mounted in a wheel train from a barrel to an escape device, an escape device side torque adjustment wheel connected with a first end of the torque adjustment clockwork spring and connected to the wheel chain part closer to the escape device side than the torque adjustment clockwork spring, a barrel side torque adjustment wheel connected with a second end of the torque adjustment clockwork spring and connected to the wheel train part closer to the barrel side than the torque adjustment clockwork spring, and a period control mechanism comprising a locking portion and a locking release portion. The locking portion locks the barrel side torque adjustment wheel after enabling the barrel side torque adjustment wheel to rotate a specified angle so as to prevent the torque from being transmitted to the escape device side from the barrel side torque adjustment wheel. The locking release portion works on the locking portion according to a specified period and releases the locking of the barrel side torque adjustment wheel. The period control mechanism enables the barrel side torque adjustment wheel to rotate relatively and intermittently relative to the escape device side torque adjustment wheel.

Description

technical field [0001] The invention relates to a torque adjusting device, a movement and a mechanical clock. Background technique [0002] In mechanical timepieces, when the operating torque transmitted from the barrel to the escapement changes with the unwinding of the mainspring of the barrel, the swing angle of the balance with hairspring changes, and the rate of the watch changes. Therefore, in order to suppress fluctuations in the operating torque transmitted to the escapement, a constant torque mechanism (torque adjustment device) in which a subspring (spring for torque adjustment) is arranged between the barrel and the escapement has been proposed. ). Constant-torque mechanisms are roughly classified into those using a flywheel (for example, refer to Patent Document 1) and those involving periodical control by a cam or the like (for example, see Patent Document 2). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Specification o...

Claims

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Application Information

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IPC IPC(8): G04B15/14G04B15/12
CPCG04B15/00G04B1/22G04B1/225G04B15/08G04B15/14G04B17/06
Inventor 藤枝久
Owner SEIKO INSTR INC
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