Hairspring being fixed by a spring washer

A technology of hairspring and inner ring, applied in the field of hairspring, can solve problems such as stress change of inner pile polygonal strips

Active Publication Date: 2018-04-20
NIVAROX FAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when applying the Von Mises criterion, collets have t

Method used

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  • Hairspring being fixed by a spring washer
  • Hairspring being fixed by a spring washer
  • Hairspring being fixed by a spring washer

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Embodiment Construction

[0021] The invention relates to a balance spring for elastic fixation by a washer. More precisely, the invention relates to a collet designed to secure the balance spring to the shaft using the elastic clamping of the washer.

[0022] This module system is described in European patent applications EP 2860591 and 2860592 in the name of the applicant and incorporated by reference in this specification. This component system offers a great deal of freedom with regard to the materials used. It is therefore particularly suitable for parts whose material has no plastic domain available, ie has a very limited plastic domain, which has components comprising different types of materials.

[0023] Therefore, in the field of horology, it is necessary to propose components of this type that allow a large degree of freedom in terms of the materials used, due to the increasing share of materials with very limited plastic domains, such as silicon-based materials, so Such silicon-based mate...

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Abstract

A hairspring being fixed by a spring washer. A collet elastically mounted on a staff whose geometry produces fewer internal stresses in particular on the contact points and the vertices of its polygonal shape.

Description

technical field [0001] The invention relates to a balance spring for elastic fixation by a washer. More precisely, the invention relates to a collet designed to secure the balance spring to the shaft using the elastic clamping of the washer. Background technique [0002] European patent EP 2916177 in the name of the applicant discloses such a collet that does not require adhesives or welding. Said collet advantageously makes it possible to avoid displacement of the connection point when the collet is received on the shaft, makes it possible to position the center of gravity on the geometric center of the strip, and also makes it possible to limit material is damaged. [0003] However, when applying the Von Mises criterion, the collet has the problem of large variations in stress along its polygonal strip. In fact, high contact stresses are generated at the contact points with the shaft and are accompanied by bending stresses at the vertices of the polygon. Contents of t...

Claims

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Application Information

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IPC IPC(8): G04B17/06G04B17/32G04B17/34
CPCG04B17/06G04B17/32G04B17/345G04B17/00
Inventor I·埃尔南德斯P·屈赞
Owner NIVAROX FAR
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