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Timepiece

A technology for timepieces and watchcases, which is applied to clocks, instruments, casings, etc. It can solve the problems of easy rusting of soft magnetic materials, large total thickness of antimagnetic watches, and difficult to obtain polished surfaces.

Inactive Publication Date: 2004-04-14
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Also, if the layer of soft magnetic material is added directly to the case back, it creates many problems because the soft magnetic material is prone to rust and it is difficult to obtain a polished surface
[0008] Therefore, due to the above reasons, in the conventional method of bonding soft magnetic materials, the total thickness of the anti-magnetic watch is large, and it is a big problem when it is desired to wear an easy and attractive shape.

Method used

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Experimental program
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Effect test

Embodiment 1

[0022] In order to solve the above problems, embodiments of the present invention will be described based on the drawings. Figure 1 shows a cross-sectional view of a timepiece with one or two layers of covering material in the case back. The case back cover 100 is made of a covering material. The covering material is composed of a soft magnetic material 140 and a non-magnetic material 120. The soft magnetic material 140 includes pure iron, silicon steel sheet, permalloy or ferrite One of stainless steel, and the above-mentioned non-magnetic material 120 includes one of titanium material or austenitic stainless steel. The outer side of the case back cover 100 in contact with the wearer's wrist is made of a non-magnetic material 120 , while the side of the movement 7 is a soft magnetic material 140 . The soft magnetic material 140 and the non-magnetic material 120 respectively form raised portions 120a, 140a at the boundary edges of the soft magnetic material 140 and the non-ma...

Embodiment 2

[0024] Fig. 2 is a cross-sectional view of a timepiece in which three layers of covering material are employed in the case back. A non-magnetic material 220 is arranged on the side of the case back cover 200 contacting the wearer's wrist, and a non-magnetic material 230 is also arranged on the side of the movement, and a soft magnetic material is sandwiched between the above two non-magnetic materials. Between the magnetic material 220,230. Both the non-magnetic material 220 on the wrist side and the non-magnetic material 230 on the movement side may be the same material, or may be different materials.

[0025] If a three-layer covering material in which the soft magnetic material 240 has been arranged in the middle is adopted, it also becomes unnecessary to add a corrosion-resistant coating because it has been covered by a titanium material or austenitic stainless steel inside, and it also becomes The cover can be made thinner by using pure iron, silicon steel sheet, permall...

Embodiment 3

[0027] FIG. 3 shows a sectional view of a timepiece using a case back 300 in which a vibrating plate 320 is bonded to the case back 100 used in Embodiment 1. Referring to FIG. The vibrating piece 320 is bonded and fixed to the surface of a soft magnetic material 140 by applying an adhesive 310 . The vibrating plate 320 vibrates by a signal from the movement, thereby emitting a sound such as an alarm. Since the other parts are the same as those of Embodiment 1, description thereof will be omitted.

[0028] Next, FIG. 4 shows the conditions under which the experiment was actually performed and the experimental results thereof. Manufactured an antimagnetic case back for wristwatches meeting the conditions for Class I diving watches for use at a water depth of 100m as specified in JIS B7024 "Waterproof watches for diving - Types and performance", And the conditions of the second class of antimagnetic watches as specified in JIS B7024 "Antimagnetic watches". In order to minimize...

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Abstract

Provided is a thin type timepiece having antimagnetic performance and waterproofness. A case side wall includes therein a movement. A case back lid is fixed to the case side wall by raised portions. Further, the case back uses a two-layer clad material of a soft magnetic material and a non-magnetic material, and the soft magnetic material is disposed on the movement side of the case back lid.

Description

technical field [0001] The invention relates to an electronic device. Background technique [0002] An antimagnetic watch is defined in Japanese Industrial Standard JIS B7024 "Antimagnetic Watch". This definition is made to specify a timepiece whose time does not deviate when the watch is wrongly placed on a magnet-generating article. [0003] An ordinary wrist watch is shown in FIG. 5 . To the upper part of the case side wall 20, a through hole is defined in its central part, and a decorative watch glass bezel 10 having an inner diameter smaller than the through hole is pushed and fitted in the above through hole, on the case side A sealing gasket 30 is provided between the wall 20 and the bezel 10 of the decorative watch bezel. The watch glass 6 is fitted to the upper part of the bezel 10 of the decorative watch glass with a sealing gasket 40 between the watch glass 6 and the bezel 10 of the decorative watch glass. A movement 7 with a dial 5 is inserted in this space. ...

Claims

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Application Information

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IPC IPC(8): G04B43/00G04B37/08G04B37/22
CPCG04B37/22G04B37/081
Inventor 深山茂
Owner SEIKO INSTR INC
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