Timepiece

Abstract

To provide a timepiece in which it has been made possible to exchange an edge member, to which a glass has been fixed, without accompanying a case band. A wristwatch comprises an annular case band, a case back, an annular edge member, a glass, and a snap ring. A front side end part of the case band forming a fitting hole has an edge receiving face around the fitting hole and an engaging back face. A case back is detachably attached to a back side end part of the case band. The glass is fitted and fixed to an annular step part having been formed in the edge member. In the edge member there are provided a tubular part penetrating through the fitting hole so as to be capable of being inserted and disengaged, and a cover part overlapping with the edge receiving face. In the tubular part there is provided an annular attaching groove opening to an outer periphery of the tubular part. A snap ring is formed in a C-shaped form by a material having an elasticity. Under a state that the case back has been detached, the tubular part is detachably attached to the front side end part by nipping the front side end part by the snap ring, which is attached/detached to/from the attaching groove and catches to the engaging back face, and the cover member.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

A preferred form of the present invention is illustrated in the accompanying drawings in which:

FIG. 1 is a plan view showing a wristwatch concerned with a first embodiment of the present invention;

FIG. 2 is a sectional view showing one part of the wristwatch of FIG. 1, while being enlarged;

FIG. 3 is a sectional view showing along an arrow line F3-F3 in FIG. 2;

FIG. 4 is a perspective view showing one part of an edge member that the wristwatch of FIG. 1 possesses, while being seen from an outside;

FIG. 5 is a perspective view showing one part of the edge member that the wristwatch of FIG. 1 possesses, while being seen from an inside;

FIG. 6 is a perspective view showing a snap ring that the wristwatch of FIG. 1 possesses;

FIG. 7 is a sectional view showing a wristwatch concerned with a second embodiment of the present invention, which corresponds to FIG. 2;

FIG. 8 is a perspective view showing a snap ring that the wristwatch of FIG. 7 possesses;

FIG. 9A is a plan view showing a snap ring that a wristwatch concerned with a third embodiment of the present invention possesses; and FIG. 9B is a perspective view showing the same snap ring.

Claims

1. A timepiece comprising: an annular case band which has a front side end part forming a fitting hole, and in which this end part has an edge receiving face around the fitting hole and an engaging back face continuous so as to bulge around the fitting hole;a case back having been detachably attached to a back side end part of the case band;an annular edge member which has a tubular part fitted so as to be capable of being inserted into and disengaged from the fitting hole and a cover part overlapped with the edge receiving face, and in which in the tubular part there has been formed an annular attaching groove opening to an outer periphery of the tubular part;a glass having been fitted and fixed to an annular step part having been formed in the edge member; anda snap ring which is formed in a C-shaped form by a material having an elasticity, which is detachably attached to the attaching hole, in which the front side end part is nipped between it and the cover part while catching to the engaging back face, and which is attached/detached under a state that the case back has been detached.

2. A timepiece according to claim 1, wherein there has been possessed an annular seal packing having been nipped between the edge receiving face and the cover part under a compressed state.

3. A timepiece according to claim 1, wherein at least one part of the snap ring is made an operating part when the snap ring is detached from the attaching groove by protruding it from the outer periphery of the tubular part and, between the operating part and the tubular part, there has been formed a wedge-like tool inserting gap when it is seen from the case back side.

4. A timepiece according to claim 1, wherein a tool inserting small hole is provided in a site having been separated from the tubular part in at least one end part of the snap ring, and thereby the one end part has been made an operating part when the snap ring is detached from the attaching groove.

5. A timepiece according to claim 1, wherein the glass is fixed to the annular step part by an adhesive.