JPH0542385Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to glass edges for watches and the like.

[Prior Art] Conventionally, polygonal glass edges of watches and the like have been formed by a long frame member having a substantially L-shaped cross section and a reinforcing member connecting the frame member. Legs are integrally formed to protrude from the outer periphery of the frame member, and locking claws for locking the glass edge to the rear frame are formed at the tips of the legs. The ends of the frame member are cut at a predetermined angle so that the ends can abut against each other. During manufacturing, a frame member is formed by extrusion molding, cut at a predetermined length and angle, and the unnecessary parts of the outer periphery are pressed out to form legs, and the ends are butted and connected with reinforcing material. ing.

[Problems to be Solved] According to the above-mentioned conventional structure, manufacturing of the glass edge requires two steps: extrusion molding and subsequent plate processing in which the legs are left behind and removed, which takes time and effort.

Further, the positional accuracy of the engaging pawl is determined during extrusion molding, but in extrusion molding, it is extremely difficult to control these, which impairs the yield of frame manufacturing and lowers productivity. Furthermore, if it becomes necessary to change the length even with the same cross-sectional shape due to changes in the size of the watch, the position of the legs will be changed and a new press mold will have to be made, resulting in higher costs. Become.

The purpose of the present invention is to eliminate the need for secondary processing for forming the legs, improve yield, increase versatility, and reduce costs.

[Means for solving the problem] In order to achieve this object, in the glass edge of the present invention, the frame and the connecting member are separate members, and the frame formed by extrusion is pressed at the corner. The connecting member, which is cut so as to fit together and connects the abutting portions of the frame portions facing the back surfaces of the corner portions, is formed by injection molding. The connecting member has a planar shape corresponding to the corner, has locking legs extending in the back direction at both ends thereof, and has claws projecting inward at the tips of the legs. be.

[Function] By forming the frame portion and the connecting member as separate members, the present invention eliminates the need to press the frame portion, and there is no need to remake the connecting member even if the dimensions of the watch change.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in Fig. 1, the glass edge of the present invention has four frame parts 1a, 1b, 1c, and 1d arranged in a rectangular manner.
A connecting member 2 having locking legs 2a is fixed to the back surface of the corner portion 1e to connect the frame portions.

The frame portions 1a, 1b, 1c, and 1d are made by cutting a long material formed by low-cost extrusion molding into a predetermined length at an angle of 45 degrees since it is a rectangle in this example. be. Its cross-sectional shape is 1st, 5th
As shown in the figure, it is approximately L-shaped.

The connecting member 2 is made by injection molding, and as shown in the second and third figures, it has a planar shape corresponding to the corner 1e of the abutted frame parts, and in this example, it is a right-angled plane. The cross section is 4th,
5, it is formed into a substantially L-shape so as to be able to come into contact with the back surface of the corner 1e of the frame. As shown in Figures 1, 3, and 4, locking legs 2a are provided at both ends so that they can be elastically deformed toward the back (downward in the drawing), and each leg 2a has an inner end at its tip. A locking claw portion 2b protruding toward the front is formed.

The assembly of the glass edge in the present invention consists of frame parts 1a, 1b, 1c, which are cut in advance so that they can butt together.
The connecting members 2 are brought into contact with the back surfaces of the corners 1e where both ends of the members 1d are abutted, and fixed by ultrasonic welding or adhesive. Locking leg 2a in this state
is located at a predetermined position, and the claw portion 2b also protrudes inward, completing assembly of the glass edge.

When fixing the front glass 4 to the rear frame 3 using this glass edge as shown in FIG. 5, the glass edge is placed at a predetermined position on the rear frame 3 and pressed downward in FIG. Since the tip of the claw part 3b is formed in a tapered shape, when the claw part 2b comes into contact with the rear frame 3, the leg part 2a
is smoothly elastically deformed outward and is locked into the locking portion 3a in a snap-like manner.

Note that the shape of the glass edge to which the present invention is applied is not limited to rectangular, but can be applied to all polygonal shapes, and depending on the number of corners, the meeting angle of the corners, that is, the cutting angle, The planar shape of the connecting member is determined. Furthermore, the cross-sectional shapes of the frame portion and the connecting member are not limited to those shown in the drawings.

[Effects] As described above, in the present invention, the frame portion is manufactured by extrusion processing, and no secondary processing is performed, so that processing is not labor-intensive and costs are reduced.

Since the frame part is not provided with a claw part, there is no need to manufacture the shape with high precision, and the yield is improved, which also contributes to lowering the manufacturing cost.

Further, since the connecting member having the leg portions and the claw portion is formed by injection molding, it can be molded with high precision, and the engagement precision between the glass edge and the rear frame is increased. Further, changes in the dimensions of the watch can be handled simply by changing the dimensions of the frame, making it easy to handle changes.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged plan view of a corner, Fig. 3 is an enlarged plan view of a connecting member, and Fig. 4 is a cross section taken along the line shown in Fig. 3. 5 are enlarged sectional views showing a state in which the glass edge according to the present invention is engaged with the rear frame. 1a, 1b, 1c, 1d... frame portion, 1e... corner portion, 2... connecting member, 2a... leg portion, 2b... claw portion.

Claims (1)

[Scope of Claim for Utility Model Registration] A frame portion formed by extrusion processing and cut so as to be able to abut each other at the corner, and a frame portion formed by injection molding and connecting the abutting portion to the back surface of the corner portion. The connecting member has a planar shape corresponding to the corner, and has locking legs at both ends thereof extending in the back direction, and a connecting member extending inwardly at the tip of the leg. A glass edge characterized in that it has a claw portion that protrudes toward the glass edge.