JPS6120552Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure of a portable watch having a glass edge with a non-circular partition, and more specifically, a structure that facilitates attachment of a particularly narrow glass edge to the body of the glass edge. Regarding.

Traditionally, mobile watches have had a glass rim that can be opened and closed to incorporate the movement from the glass side, and the movement has been incorporated from the back cover side, or decorated to make the design look thinner or to vary the pattern or finish. There is a glass rim that can be placed on the wall. The present invention relates to the latter decorative glass rim. For this type of glass edge, it is common to have a circular glass edge that is simply ground and cut on a lathe, but glass edges with non-circular edges are difficult to process, so various techniques are used. has been done. The most common method is to glue or caulk the glass edge to the body.

FIG. 1 shows a conventional embodiment in which fixation is performed by caulking. The glass edge 3 has a protrusion 3a in the axial direction on its lower surface.
After being inserted into the shell 1, the protrusion 3a is pushed outward and fixed to the shell 1 by caulking as shown in 3a'. 7 is a waterproof seal that guarantees waterproof performance between the glass edge and the body. The glass 4 is bonded to the top step of the glass edge 3. 2 is the back cover to which the core 5 is brazed. 8 is a waterproof gasket that prevents water from entering from the direction of the back cover. 6 is movement. In the conventional structure shown in FIG. 1, the glass edge 3 and the body 1 are fixed by caulking at the portion 3a' as described above, so the glass edge 3 needs to have sufficient strength to withstand the caulking process. For waterproofness, if the waterproof gasket 7 is arranged as shown above, a space must be secured for the gasket, and the edge width W of the glass edge cannot be made too thin, so it is limited (approximately 2 mm).
It was hot. However, as the number of watch designs has increased and become more diverse, there has been an increasing demand for slimmer designs with narrower glass edge widths W. The caulking method described above can no longer be used.

Furthermore, in the bonding method, there is also a limit to how thin the edge width W can be made due to constraints on the effective bonding area in terms of bonding strength.

The present invention ameliorates these drawbacks and provides a structure for attaching a slimmer and thinner glass edge.

FIG. 2 shows a basic embodiment of the present invention.

The glass edge 3 is provided with two or more (usually four as standard) protrusions that protrude in the radial direction at the bottom. In order to insert the glass rim 3 into the barrel, as shown in the plan view of Fig. 3, the protruding part 3a is elastically deformed in the inner radial direction (elastically deformed as shown by the broken line contour 3A' in Fig. 3). ) Insert into barrel 1. When it is inserted to a predetermined position, the restriction on the insertion diameter 1A portion is released, and the shape is restored to the original contour 3A. In this state, there is a seam l
(0.1~0.5mm) so it will not come off. However, as described above, in order to elastically deform the glass edge 3 in the radial direction, if the glass edge width W is too thick and strong, it will not easily deform. Therefore, in this invention, this edge W is set to about 1.5 to 4 mm, and the section modulus is set to 1 compared to the conventional one.
By setting the value to 0.5, the glass edge is deformed within the elastic deformation range and to the extent that the glass edge can be pushed in by hand. However, as in the present invention, the edge width W
If it is made thinner to about 1.5 to 4 mm, it becomes easier to push the glass edge, but it also has the disadvantage that it is more likely to come off. Therefore, in the present invention, after attaching to the glass edge 3 and the body 1, the windshield 4 is inserted into the upper surface step part of the glass edge 3, so that the glass edge 3 is moved in the inner diameter direction (the broken line shape in FIG. 3, that is, the outline 3A' ). The windshield 4 may be simply pressed into the glass edge 3, but usually an adhesive is additionally used to prevent water and dust from entering. As described above, according to the present invention, a glass edge having an extremely narrow glass edge width W can be fixed to the body. Conversely, it can be said that the structure of the present invention is possible because the glass edge width W is narrow, but in any case, an extremely light and thin glass edge has become possible in terms of design.

FIG. 4 shows another embodiment of the present invention. This embodiment has a waterproof structure by placing a waterproof gasket 9 next to the windshield. Conventional waterproof structures had an undeniable impression of being bulky and thick, but with this invention we were able to create an extremely lightweight waterproof structure.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the conventional structure, Fig. 2 is a cross-sectional view of the embodiment of the present invention, Fig. 3 is a plan view of the engagement portion between the glass edge and the barrel, showing the engagement principle of the present invention, and Fig. 4. is another embodiment of the present invention. The symbols in the diagram are common to each diagram: 1...Body, 2...Back cover, 3...Glass rim, 3a
... Protrusion, 4 ... Windshield glass, 5 ... Core, 6
...Movement, 7, 8, 9...Waterproof packing.

Claims (1)

[Scope of utility model registration request] An engagement protrusion that engages with an opening formed in the body direction with a slight engagement allowance, and a non-circular groove formed on the outer periphery between the body opening and the groove for inserting the waterproof gasket. After providing a glass edge and arranging a waterproof gasket in the groove, the glass edge is elastically deformed in a plane in the inner radial direction to engage the engagement protrusion with the lower surface of the opening of the body, and the glass edge is A structure of a mobile watch case characterized in that the glass edge and the body are integrally fixed by restricting deformation of the glass edge in the inner diameter direction by pushing a windshield glass into the inner diameter of the upper part.