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Mainspring for clock and watch and mechanical clock and watch provided with the same

A clockwork and clock technology, applied in the driving mechanism of clocks, mechanically driven clocks, clocks, etc., can solve problems such as difficult shape control

Inactive Publication Date: 2012-09-05
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assuming that the curved shape is changed along the length direction of the watch spring, it is actually difficult to accurately control the shape at an appropriate manufacturing cost

Method used

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  • Mainspring for clock and watch and mechanical clock and watch provided with the same
  • Mainspring for clock and watch and mechanical clock and watch provided with the same
  • Mainspring for clock and watch and mechanical clock and watch provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Shown by unfolding the main body 30 of the watch spring 1 based on the preferred embodiment of the present invention figure 1 (a) and (b) and showing its cross-section figure 1 Before explaining (c) to (g), based on image 3 (a) to (d) briefly describe the barrel 2 assembled with the timepiece spring 1 .

[0088] Depend on image 3 It can be seen from (a) to (d) that the barrel 2 of the mechanical timepiece 5 has the timepiece mainspring 1 , the mainspring barrel 10 and the barrel arbor 20 . In addition, in image 3 In (a) to (d), only the barrel 2 of the mechanical timepiece 5 is shown, and other parts are omitted.

[0089] In the barrel wheel 2, the spiral main body 30 is engaged with the engaging portion 12 of the inner peripheral wall 11 of the barrel 10 at the bent engaging portion Hf located at the end of the outer peripheral end portion 32, The spring main body 30 is mounted to the mounting portion of the barrel arbor 20 at the mounting portion He at the tip...

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Abstract

The invention provides a mainspring for a clock and a watch and a mechanical clock and watch provided with the same, the mainspring and the method can inhibit change of an output torque generated with loosening (uncoiling) to the lowest limit and facilitate manufacture. The mainspring (1) has a spring main portion (30) having resilient, elongated, plate-like portion (31). The end portion (32) of outer circumferential side of spring main portion (30) is engaged with a barrel drum, and the end portion (33) of an inner peripheral side is engaged with a core barrel. The main portion (30) is bent along a bending line (B) extending in the length direction (J) in a mode that the bending angle (Theta) which is enlarged to the end portion of the inner peripheral side (33) in at least a part of length direction zone (Qi). The length direction zone (Qi) comprises a part close to inner peripheral side (33) engaged with the core barrel in the main portion (30). The maximal value of the bending angle (Theta) is below 25 degrees.

Description

technical field [0001] The present invention relates to a clock spring and a mechanical timepiece including the clock spring. Background technique [0002] A watch spring is composed of a spring main body. The spring main body is composed of an elongated leaf spring, that is, an elongated plate-shaped body made of elastic material. The cross-section of the elongated leaf spring or plate-shaped body is usually thin. A long (thinner than width) rectangle whose cross-sectional shape extends from the outer peripheral end that engages with the barrel to the inner peripheral end that engages with the barrel arbor in the spring body are constant (same). [0003] However, in this case, since the bending state of the mainspring is different between the inner peripheral end and the outer peripheral end, the output torque output from the mainspring is different. [0004] On the other hand, in order to obtain a constant output torque for 24 hours when the mainspring starts to unwind, ...

Claims

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Application Information

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IPC IPC(8): G04B1/16G04B1/14
CPCG04B1/145G04B1/18
Inventor 麦岛胜也
Owner SEIKO INSTR INC
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