Method and device for fixing a sheet of glass with counter-blade

A watch glass and fastening technology, which is applied in the field of watch manufacturing, can solve the problems of a large amount of investment, etc., and achieve the effect of facilitating assembly and improving sturdiness

Active Publication Date: 2013-07-17
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for mass production bonding requires a lot of manpower to perform precise and repetitive positioning of the components to be assembled; while ultrasonic welding requires a large investment

Method used

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  • Method and device for fixing a sheet of glass with counter-blade
  • Method and device for fixing a sheet of glass with counter-blade
  • Method and device for fixing a sheet of glass with counter-blade

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] The present invention uses the concept of a snap fit or press fit installation, which involves elastic deformation of the elements during assembly, but unlike the push-in method (also specifically called setting in the jewelry field), which does not require friction to hold assembly position. The snap-fit ​​assembly also differs from the push-in method in that since the snap-fit ​​element then returns to the normal shape it had at rest before the snap-fit ​​operation, once the snap-fit ​​has started, the force applied to the snap-fit The deformation force on the component should disappear.

[0018] figure 1 Shows bezel 1 and crystal 2 not yet assembled to each other according to a preferred variant of the invention viewed from above, which concerns square plastic bezel 1 and crystal 2 .

[0019] On the bezel 1 is shown the outer substantially vertical wall 12 and the top outer surface 11 forming a substantially horizontal, slightly domed surface to better match the pr...

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PUM

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Abstract

The method involves snap fitting a watch bezel (1) on a crystal (2), where the bezel includes a snap fit unit that is guided by a guide unit (5) installed on a case (3). The snap fit unit is located against the crystal by the guide unit. The crystal is secured to the case. Axial positioning of the crystal relative to the bezel is ensured by axial positioning unit arranged on an internal face of the bezel and a top face (213) of peripheral edge of the bezel. A snap fit surface of the snap fit unit is formed underneath a snap fit surface of the crystal located on peripheral edge of the crystal. An independent claim is also included for a device for securing a watch bezel, comprising an axial positioning unit.

Description

technical field [0001] The invention relates to the field of watchmaking. More specifically, it relates to methods of fastening bezels on watches. The invention also relates to a fastening device for carrying out the fastening method. Background technique [0002] For assembling bezel and crystal, so-called friction fit fittings are known, which usually require gaskets to absorb the radial pressure of the crystal on the bezel. These methods are commonly used for high-end field watches that use metal bezels and watch glasses made of very hard and very expensive materials such as corundum or sapphire. [0003] For plastic bezels and crystals, alternative mounting methods to the push-in method are known, using for example gluing, ultrasonic welding, or fastening by snap-fit ​​(also known as press-fit) mounting through elastic deformation during assembly element. However, for mass production bonding requires a lot of manpower to perform precise and repetitive positioning of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04D3/00G04D3/04
CPCG04B39/00G04B39/004Y10T29/53Y10T29/23Y10T29/53639Y10T29/49579Y10T29/5347Y10T29/53643E06B3/6604B32B17/10055E06B3/66309
Inventor T·阿尔滕霍文A·恩格尔曼J-C·克劳格
Owner ETA SA MFG HORLOGERE SUISSE
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