JPS5837027Y2 - Structure of watch case - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof fixing structure between the body of a watch case and the glass rim.

Conventionally, the structure of this part was attached to the body 3 as shown in Fig. 1, but by press-fitting the glass edge 2 through the backing 5, the body 3 and the glass edge 2 were kept fixed and waterproof. .

However, with regard to fixing, the backing 5 is compressed in the radial direction, and the fixing force is unstable and insufficient because the backing 5 is compressed in the radial direction and the force is only due to frictional resistance as a reaction force.

For this reason, when replacing the glass during after-sales service, if you push the glass from below, the glass edge comes off first, which increases the process of removing the glass again, installing the glass, replacing the backing, pressing the glass edge, and increases costs. It was also the cause.

Furthermore, the glass edge 2 may float due to the reaction force of the push-in, or float may occur in the glass edge 2 due to impact such as dropping, creating a gap in the direction of arrow A, resulting in problems in appearance.

The present invention eliminates these drawbacks and provides a structure that securely fixes the glass edge to prevent it from slipping upward.

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 3 in FIG. 2 is a barrel, which has a stepped portion at the upper part of its inner periphery, and has a groove 3a and a chamfer 3b serving as a guide when compressing the backing 5 on the inner periphery 3C of this stepped portion.

Reference numeral 2 denotes a glass edge, which has a groove 2b at the lower part of the outer periphery for attaching the backing 5, and a protrusion 2a at the lower part thereof.

The protrusion 2a and the groove 2b may be formed alternately all around the circumference, or may be formed only partially.

The backing 5 is attached to the groove 2b of the glass edge 2, is pushed into the body 3 using the chamfer 3b of the body 3, and is inserted between the stepped inner periphery 3C of the body 3 and the groove 2b of the glass edge 2 in the radial direction. It is compressed to maintain airtightness between the body 3 and the glass edge.

The outer diameter of the projection 2a of the glass edge 2 is formed to be slightly smaller than the diameter of the stepped inner periphery 3C of the shell 3, and after assembly, by applying external force from the inner periphery to the outer periphery, the projection 2a is 3
into the groove 3a.

That is, by applying an external force to the pressing surface 2C provided at the lower part of the glass edge 2, the projection 2a is plastically deformed, and the projection 2a is deformed plastically.
The outer diameter of the glass edge 2 is made larger than the diameter of the inner periphery of the stepped portion of the body 3, thereby reliably fixing the glass edge 2 and the body 3.

Note that it is sufficient that the length of the protrusion 2a is slightly smaller than the length of the groove 3a.

Further, although the pressing surface 2c is formed obliquely as shown in FIG. 2, it may be formed vertically.

As described above, since the present invention has a structure that separates the waterproof part and the fixing part, it provides a structure that ensures the fixing force, which was unstable in the past, and makes it easier to replace glass during after-sales service. We were able to solve the problem of the body and glass edge coming off first during the process.

Furthermore, the glass edge was prevented from protruding from the upper surface of the body due to the reaction force of pushing or impact from falling.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of a conventional watch case, and FIG. 2 is a sectional view showing an embodiment of the present invention. 1...Glass, 2...Glass edge, 2a
...Protrusion, 2b...Groove, 2C...
... Pressing part, 3 ... Body, 3a ... Groove, 3b ... Chamfer, 3C ... Inner circumference of step, 4 ...・Backing, 5...Backing.

Claims (1)

[Scope of utility model registration request] In the structure of a watch case that waterproofly fixes the body and the glass rim by compressing the backing in the radial direction, the body has a stepped portion at the upper part of the inner periphery and a groove is provided on the inner periphery of the stepped portion. , the glass rim is provided with a groove portion for attaching a backing to the lower part of the outer periphery, and furthermore, a groove part is provided at the lower part of the outer periphery, the diameter of which is smaller than the stepped inner periphery of the body, and which extends from the inner periphery toward the outer periphery after the glass rim is assembled into the body. It has a protrusion that is pressed by an external force and inserted into the groove of the body, and the upper surface of the groove of the glass edge is in contact with the upper surface of the stepped portion of the body, and the upper surface of the groove of the glass edge is in contact with the upper surface of the groove of the body. A structure of a watch case characterized in that the protrusions are in contact with each other.