JPS5937792B2 - tokei case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure that provides airtightness between a glass edge and a body of a watch case, and particularly to a structure that provides airtightness between a non-circular shaped glass edge and a non-circular shaped body. This is effective when obtaining .

The purpose of the present invention is to provide a reliable thin and compact watch case by arranging a gasket between the glass edge and the body of the watch case and securely fixing the two, and also to provide watch cases with a variety of designs. It's about getting.

A conventional watch case is shown as a typical example in FIG. 1, in which a glass 2 is integrally fixed to a non-circular glass edge 1 by press-fitting, caulking, etc., and a lower part 1a of the glass edge 1 is attached to an upper part 3a of a body 3. It was fixed with an adhesive, and a dowel 4a provided on the outer periphery of a non-circular back cover 4 was engaged with a groove 3c provided in the inner lower part 3b for the core.

In this structure, the fixation and airtightness between the glass edge 1 and the body 3 are maintained by adhesive, but the adhesive deteriorates over time due to humidity and temperature changes, resulting in the fatal possibility of peeling off. Due to these drawbacks, the fixation between the glass rim and the barrel was incomplete, and sufficient airtightness could not be achieved between the two.

On the other hand, in order to solve the problem of using an adhesive as shown in FIG. 1, a structure in which the glass edge is directly attached to the barrel as shown in FIG. 2 has been considered.

This structure is shown in FIG. 2 as a comparative example of the present invention and will be described in detail.

In FIG. 2, 11 is a glass edge to which the glass 12 is integrally fixed by press-fitting or caulking, 13 is a gasket,
It is arranged between the glass edge 11 and the barrel 14.

The glass edge 11 engages with the barrel 14 by biting.

That is, the lower part 11a of the glass edge 11 is connected to the barrel 140 step part 1.
Let 4a bite and make sure they don't separate from each other.

A back lid gasket 16 is disposed between the body 14 and the back lid 15, and a dowel 15a provided on the outer periphery of the back lid 15 is engaged with a groove 14c provided in the inner lower portion 14b for the core. 16 in the axial direction to make the entire watch case airtight.

However, in this case, since the lower part 11a of the glass edge 11 is directly bitten and engaged with the body 14, the lower part 11a is made of the same material as the glass edge 11, and a material that is unfavorable for biting is selected from the viewpoint of corrosion resistance and finish workability. If the lower part 11a is formed integrally with the glass edge, it becomes extremely difficult to process the lower part 11a, which requires high dimensional accuracy due to the stability of the biting force. There was a problem.

The present invention solves the above-mentioned problems all at once, and its gist is to improve the airtightness between the non-circular glass rim and the non-circular body to which the non-circular glass is integrally fixed. In this structure, a gasket is disposed between the lower surface of the glass edge and the upper surface of the body in the axial direction, and a pin or plate integrally fixed to the lower part of the glass edge is bitten into the stepped part of the body. It is something to do.

First, in FIG. 3, the glass edge 21 and the body 24 are fixed together by means such as press-fitting, caulking, welding, brazing, etc.
The zero step portion 24a is bitten to prevent them from coming apart from each other.

The arrangement of the packing 23 is exactly the same as that shown in FIG. 2, and this provides airtightness between the glass edge and the core.

The airtightness between the case 24 and the back lid 25 is also the same as in FIG. 2, and these provide airtightness for the entire watch case.

Next, in FIG. 4, the glass edge 31 and the body 34 are fixed by attaching the protrusion 36a of the plate 36, which is integrally fixed to the glass edge 31a by welding, brazing, etc., to the stepped part 34a of the body 340. This is to prevent it from coming off.

The arrangement of the packing 33 is exactly the same as that shown in FIG. 2, and this provides airtightness between the glass edge and the core.

The airtightness between the case 34 and the back lid 35 is also the same as that shown in FIG. 2, and these provide airtightness for the entire watch case.

With the structure described above, the present invention does not use any adhesive or the like, so the glass edge and the body are permanently fixed, and at the same time, the airtightness between them is maintained for a long time. be.

Therefore, the watch case is reliable in terms of quality, and also has a thin and compact design, making it useful for a wide range of applications.

In particular, in the present invention, since the glass and the glass edge have a non-circular shape, the biting portion of the glass edge is only required partially, and a wide variety of glass edges and bodies can be employed in terms of design.

In addition, since the packing is compressed in the axial direction, it has a large diameter (20 to 49 mm in most cases) and is installed between walls in the radial direction where dimensional accuracy cannot be improved. Short and small in size (mostly a few m7')
(within IL) improves dimensional accuracy, stabilizes the elastic force of the packing, and significantly improves waterproofness.

In addition, since the glass rim of the present invention bites into the body through the pins and plates attached at the bottom, the material of the pins and plates can be made to be easily elastic, and the material of the glass rim can be adjusted for processing and design finishing. The most suitable one can be selected from the above, and non-circular bits that are difficult to process can be formed using separate members such as pins or plates, providing a structure that is extremely easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing an embodiment of a conventional watch case, FIG. 2 is a partial vertical cross-sectional view showing a comparative example of the present invention, and FIGS. 3 and 4 are partial longitudinal cross-sectional views showing an example of the present invention. FIG. Part names of main numbers in the diagram, 1. IL2L 31... Glass edge, 2, 12, 22, 32...
...Glass, 3,14,24,34...Body, 4,15゜25.35...Back cover, 16...
...Urabuta Patsukin.

Claims (1)

[Claims] 1. In a structure that provides airtightness between a non-circular glass edge and a non-circular body, in which non-circular glass is integrally fixed, a gasket is installed between the lower surface of the glass edge and the upper surface of the body in the axial direction. A watch case characterized in that a pin or plate integrally fixed to the lower part of the glass edge is bitten into the stepped part of the case.