JPS60123378A - Case made of synthetic resin for cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a case C for a video or audio cassette, that is, a tape reel rotatably incorporated therein and forming a frame for the cassette 1.

All conventional products are separated into a front case and a back case, and they are not the same shape.
There are various inconveniences due to the fact that they are separate structures, starting from the quantity control of both cases, the sorting of both cases must be managed so that they do not clutter, and both cases must be assembled without fail. Moreover, since the demand for this product is expected to increase year by year, the problems caused by its unproductive structure must be resolved as soon as possible.

The present invention solves the problems on paper and is structured to be easy and productive to assemble, and the front case and the back case are connected to each other by forming one side wall of at least one of the cases. It is characterized in that it is constructed by connecting a joint wall portion that can be bent from the original side.

An example of implementation of the present invention will be described below based on the drawings.

The drawing shows an example of a case for a video cassette, and this case (A) made of synthetic resin includes a front case (1), a back case (2), ! i'r-s (1)
(2) and a joint wall (3) having an integral structure, and the cover head (4) of the tape is attached so as to be openable.

The front case (1) and the back case (2) are each molded into the desired shape, including a holding part that rotatably stores the tape reel, and the joint wall part (3) that connects both cases is One side wall of at least one case, that is, the embodiment shown in FIGS. 1 to 7, and the front case (
It is formed on the - side 1 (la) of 1). This joint wall part (3) is formed by making the joint wall part (3a) with the front side case (1) and the joint molding part (3b) with the back case (2) thin and bendable. Both cases (1) and (2) are molded into the same body as the joint wall (
3) as a medium, that is, the state of injection molding with a molding die (Figures 5 and 6), and the coupled molding (3)
a) is bent to the valley side to form one side wall (1a), and then the coupled mold (3b) is bent to the valley side to form both cases (1) and (2).
It is J, sea urchin, which can be assembled into a case shape.

Join 1 to wall (3) are connected to the − side wall (
It is formed so as to be able to engage with the - side wall (1a), and is integrally coupled with the - side wall (1a). Specifically, the front case (1
) on the − side wall (1a) side is the concave hooking portion (1b), and the bonding surface on the joint wall (3) side is the convex hooking portion (3).
0), the hooking portion (3C) meshes with the hooking portion (1b) to integrally form one side wall (1a).

(Fig. 3) In addition, the joint wall (3) may be formed on both cases (1) and (2) (Fig. 8), or the - side wall (1a) of cases (1) and/or (2). Formed in part of 2a) (
(Fig. 9).

Thereby, one case and the other case can be assembled by bending the joint wall portion (3) from its joint mold.

The case (A) of the present invention is of a mass-produced type in which the case (A) is injection molded into the same body using upper and lower molding dies in the 1 state shown in FIGS. 5 and 6.

Therefore, the present invention has the following advantages.

■ The front and back cases have a one-piece structure through the joint wall, and the front and back cases were blindly folded together by bending and connecting with the case attached to the joint wall. It can be assembled easily.

■ The joint wall is formed by one side wall of the case.
After assembly, the join 1 to wall part forms one side wall of the case, the outer surface of the fast-forming part has no unevenness, and the mating surfaces of the front and back cases are included (indicating a combined structure with no gaps,
It has a sealed structure that prevents foreign matter such as dust from entering.

■ Integral structure C1 that can be integrally molded by injection molding etc. Low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the case of the present invention. FIG. 2 is a longitudinal sectional view taken along line [-II. FIG. 3 is a partially enlarged plan view taken along line mm. FIG. 4 is a developed perspective view. Figure 5 shows the state before assembly. Figure 6 is IV-IV
A vertical cross-sectional view along the line. FIG. 7 is a longitudinal sectional view of the same showing a state in the middle of assembly. FIG. E3 and FIG. 9 are enlarged longitudinal sectional views of the main parts. In the figure, 1) is the front case (Ia), (2a) is the − side wall (2) is the back case (3) is the joint wall <3a), and (3b) is the coupled molding patent applicant: Taka Nakamoto.

Claims (1)

[Claims] A synthetic resin case for a cassette, in which a front case and a back case are connected by a joint wall part that forms one side wall of at least one of the cases and is bent from the connected side.