JPS6246836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof watch case, and more particularly to a sealing device between a case back and a body bezel of an ultra-flat watch having a thickness of 4 mm or less.

It is an object of the invention that the barrel bezel, which has a thickness practically equal to the case thickness, includes a lower shoulder adapted to receive the case back, and the annular tight gasket has at least two wings in cross section. characterized in that one of the wings is compressed between the case back and the case ring supporting the movement, and the other wing is compressed between the body bezel and the case ring. It is in an ultra-flat waterproof watch case.

The accompanying drawings schematically illustrate, by way of example, two embodiments of an ultra-flat waterproof watch case according to the invention.

In FIG. 1, the watch case is arranged in a circular or otherwise formed housing and includes a back cover 1 provided on the underside of the body bezel and resting on a shoulder 3 of the body bezel. I'm here.

In the use position, this back cover is secured by screws (not shown) that are screwed into tappings provided on the body bezel 2 perpendicular to the plane of the shoulder 3. The body bezel 2, which is equal to the total thickness of the watch, i.e. less than 4 mm, includes an upper housing forming a shoulder 5 which is adapted to receive a mirror 6.

The tightness between the mirror 6 and the body bezel 2 can be obtained in any known manner, in particular by gluing.

The body bezel 2 has a second housing defining a second lower shoulder 7 of smaller dimensions than the housing receiving the back cover 1.

A case ring 8 is provided to secure the movement. This case ring is accommodated, like the dial 9, in the third housing of the barrel bezel 2, which is smaller in size than the shoulder 7.

Case ring 8 includes an annular lower housing.

The tight gasket made of flexible material has an annular, circular or polygonal shape, depending on the shape of the watch. This gasket consists of three wings 10, 11, 12 in cross section. First wing part 1
0 is compressed between the back cover 1 and the case ring 8 which is supported against the shoulder 13 of the body bezel 2 via the dial 9, and the back cover is supported in a predetermined position by screws (not shown). be done.

The second wing 11 of the elastic gasket is compressed between the case ring 8 and the body bezel 2, while the third wing 12 of the gasket is compressed between the case back 1 and the body bezel 2. .

The main advantage of such a gasket is that it simultaneously ensures tightness between the case back, body bezel and case ring, and above all the body bezel so as not to increase the thickness of the case in any way. and is located entirely within the housing of the case ring and cannot be accessed or viewed from outside the case.

The dimensions of the gaskets 10, 11, 12 are such that, in the illustrated use position, they are compressed in their entirety between the case back 1 and the case ring 8 on the one hand and between the case ring 8 and the body bezel 2 on the other hand. It's becoming like that. Furthermore, this gasket also covers the part 1 placed between the case ring 8 and the barrel bezel 2.
1 along a radially extending direction relative to the case.

Complete sealing to several atmospheres, for example 3 to 4 atmospheres, is thus obtained with a single gasket which is very easy to manufacture and to install in place and which does not increase the thickness of the ultra-flat case.

This structure is extremely easy to manufacture since it is a straight-away assembly that is easy to machine and easily ensures good quality of the tight case.

In the second embodiment shown in FIG. 2, the gasket consists of only two wings 10, 11 and thus has a generally rectangular shape in cross section.

Here, the case ring 8 has a Z-shape in cross section. In the position of use, the gaskets 10, 11 extend in their entirety axially between the case back 1 and the case ring 8 and between the case ring 8.
and the body bezel (middle bezel) 2.

The same advantages as described in the first embodiment are also observed here.

It is self-evident that the described sealing device can be used independently of round or molded cases and that this has further advantages.

[Brief explanation of the drawing]

FIG. 1 is a partial radial sectional view of a timepiece according to the first embodiment, taken along the axis of the winding shaft, and FIG. 2 is a partial radial sectional view of the second embodiment. In the figure, 1 is the camera back, 2 is the body bezel, 3 is the shoulder, 7 is the lower shoulder, 8 is the case ring, 10, 1
1 and 12 are gaskets or wing parts.

Claims (1)

Claims: 1. A barrel bezel with a thickness practically equal to the thickness of the case includes a lower shoulder dedicated to receiving the case back, and an annular tight gasket at least It has two wings, one of which is compressed between the case back and a case ring supporting the movement, and the other wing is compressed between the body bezel and the case ring. An ultra-flat waterproof watch case. 2. The ultra-flat waterproof watch case according to claim 1, wherein the gasket includes a third wing section compressed between the case back and the body bezel. 3. The ultra-flat waterproof watch case according to claim 1, wherein the gasket has an L-shaped cross section. 4. The ultra-flat waterproof watch case according to claim 2, wherein the gasket has a T-shaped cross section. 5. In the position of use, the gasket is compressed axially in its entirety and radially in respect of the part disposed between the case ring and the barrel bezel. The ultra-flat waterproof watch case described in any of the preceding paragraphs.