JPH0131984Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a transparent front cover that is secured to a case of a watch or the like to protect a display section.

[Background technology]

This type of front cover is generally made of transparent synthetic resin by injection molding. In injection molding, a gate is indispensable for injecting resin, but when cutting the front cover of a watch, etc., the residue left after cutting the gate, that is, the gate mark, deteriorates the appearance, and the process of cutting the gate is troublesome. Ta. Conventionally, as shown in the first diagram, a gate B is provided on the end face of the peripheral wall of the front cover A, and in order to make the trace of the gate B difficult to see, the part where it overlaps with the end face of the peripheral wall of the dial C is made into a white band shape. . In this case, there are restrictions on the design of the dial C, and the gate cutting process must be performed carefully, which reduces work efficiency. Further, as shown in the second figure, a gate B is provided on the outer surface of the peripheral wall of the front cover A, and knurling D is provided on the inner peripheral surface of the peripheral wall in order to make the marks of the gate B difficult to see. Even in this case, there are restrictions on the design of the front cover A, and the workability of the gate cutting process is also reduced.

[Purpose of invention]

The present invention was developed in view of the above-mentioned reasons, and its purpose is to provide a front cover for a watch, etc., in which gate marks are difficult to see, and the gate can be easily cut, thereby improving workability. It is in.

[Disclosure of invention]

(Example) Hereinafter, an explanation will be given based on FIGS. 3 to 8, which are shown as examples of the present invention.

In FIG. 3, reference numeral 1 denotes a transparent box-shaped front cover that is secured to a case of a watch or the like to protect the display section thereof. Near the tip of the outer surface of the peripheral wall 2 of the front cover 1, a plurality of locking portions 3 for locking to the case are provided protrudingly. This locking part 3 has a triangular cross section, and its distal end 3a has a gentle slope to facilitate the locking operation, and its proximal end 3b
The locking position is made steeply sloped to make it difficult for the locking state to come off.
Furthermore, a gate 4 for injection molding is provided on either of the locking portions 3. In this case, if the gate 4 is provided on a gentle slope on the distal end side 3a of the locking portion 3, it will be easier to lock the gate 4 to the case.

Note that the cross section of the locking portion 3 is not limited to a triangle, and may be any shape such as a rectangle or a trapezoid.

FIG. 4 shows a state in which the gate 4 is cut leaving an appropriate amount, and the locking portion 3 of the front cover 1 is locked in the locking hole 6 of the case 5.

FIG. 5 shows the procedure for locking the front cover 1 to the case 5. First, the locking part 3 provided with the gate 4 is fitted into the locking hole 6 of the case 5, and then the gate 4 is installed. The locking portion 3 that is not attached is inserted into the locking hole 6 and locked.

6 to 8 show the shapes of the gates. The one in FIG. 6 has a thin part 4a so that the thickness of the gate 4a can be different, and the one in FIG. 7 has a recessed part 4b in the gate 4. , the one in FIG. 8 has a narrow portion 4c formed so that the width of the gate 4 can be different,
In either case, the gate 4 can be easily cut, and the remaining amount of the gate can be kept approximately constant.

[Effect of idea]

As mentioned above, in the present invention, an injection molded gate is provided on one of the plurality of locking parts protruding near the tip of the outer surface of the peripheral wall of the front cover of a watch, etc., so that the front cover can be attached to the case of the watch, etc. When the gate is stopped, the marks on the gate will not be visible and the appearance will not be spoiled, and since the gate is hidden in the locking hole of the case, there is no need to be particularly careful when cutting the gate, which improves work efficiency. It is possible to provide a front cover for a watch or the like that improves the quality of the watch.

[Brief explanation of the drawing]

1 and 2 are a cross-sectional view and a side view including a partial cross-section of a conventional example, and FIGS. 3 to 8 are an embodiment of the present invention, and FIG. Figure 4 is a side sectional view showing the state locked to the case, Figure 5 is a side sectional view showing the procedure for locking to the case, and Figures 6, 7 and 8 are side sectional views showing different gate shapes. FIG. 2 is a diagram and a plan view. DESCRIPTION OF SYMBOLS 1... Front cover, 2... Surrounding wall, 3... Locking part, 4... Gate, 5... Case, 6... Locking hole.

Claims (1)

[Scope of utility model registration request] It is a transparent box-shaped front cover that is secured to the case of a watch or the like to protect the display section, and has a gate formed by injection molding on one of the multiple retaining parts protruding near the tip of the outer surface of the peripheral wall. A front cover of a watch, etc., characterized by: