JPH0128696Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cabinet made mainly of plastic used in electrical appliances such as televisions and radios, and is particularly applicable to cabinets consisting of the front plate and cover of a television, which serves as a control mask. The present invention relates to a cabinet that has a strong joint state and is easy to assemble by forming uneven surfaces having the same radius of curvature at the joint portions of the two and fitting them together.

2. Description of the Related Art Conventionally, a connecting portion of a cabinet used in electrical appliances such as televisions and radios has a structure as shown in FIG. That is, in the figure, the cabinet consists of a cover 1 and a control mask 5, and a fitting piece 3 provided at the end of the cover 1 is inserted into a fitting groove 4 formed at the end of the control mask 5. It was connected. In this connection method, the connection in the horizontal direction (AB direction) in the same figure is strong and will not necessarily shift or come off, but the connection in the vertical direction (C, D direction) is weak and can easily come off. , it is necessary to tighten with screws or the like near the fitting part, which has the drawback of increasing the number of parts and manufacturing man-hours, which also increases the manufacturing cost.

The object of the present invention is to eliminate the above-mentioned drawbacks of conventional cabinets, and to provide a cabinet that has a strong connection and is easy to assemble.

The present invention achieves the above object by providing a concave and convex curved surface with the same radius of curvature at the joint between the control mask and the cover, so that the two curved surfaces are brought into contact with each other and fitted together.

Embodiments of the present invention will be described below based on the drawings. FIG. 2 is a cross-sectional view of the main parts of the cabinet according to the present invention, showing a state in the middle of connection. In the figure, a receiving rib 7 is provided near one end of the control mask 5, and a fitting portion 4a is formed between the receiving rib 7 and the end surface portion 5a of the control mask 5. The receiving rib 7 is formed with a cylindrical concave surface 7a having a radius of curvature R.

A fitting piece 3 is provided at the connecting portion of the cover 1 to the control mask 5, and a cylindrical convex surface 3a having a radius of curvature R is formed in a part of the fitting piece 3.
The central axis of the cylindrical concave surface 7a coincides with the edge 6 of the end surface portion 5a of the control mask, while the central axis of the cylindrical convex surface 3a coincides with the edge 2 of the cover 1. Therefore, when assembling the cover 1 and the control mask 5, as shown in the figure, the edge 2
If the edges 6 and 6 are aligned, both uneven surfaces 7a, 3
a contact each other, and when the cover 1 is rotated in the direction of arrow E in the figure, the tip of the fitting piece 3 is inserted into the fitting part 4a. In order to smoothly rotate the cover 1, it is desirable to provide a chamfer 8 on the inner edge of the control mask end face portion 5a.

FIG. 3 is a diagram showing a state in which the cover 1 and control mask 5 have been assembled. As is clear from the figure, in this state the movement of the cover 1 is A,
There is no degree of freedom in the B, C, and D directions, and only rotation in the F direction is possible. Therefore, the screw 1 shown in the diagram
The cover 1 and the control mask 5 are firmly connected by only tightening the 31 pieces.

FIG. 4 is a perspective view showing details of the connection portion of the control mask 5 to the cover 1. In the case illustrated in this figure, there are three receiving ribs 7 provided near the end of the control mask 5,
Orthogonal reinforcing ribs 10 are integrally provided. Further, the concave surface 7a formed on the receiving rib 7 and the edge of the control mask end face portion 5a are connected by a rib 9 in order to allow the mold to slide during molding of the control mask 5.

FIG. 5 is a perspective view showing details of the connection portion of the cover 1 to the control mask 5. As shown in FIG. The example shown in this figure is for the control mask shown in FIG. 4, and the fitting piece 3 is provided with a relief 3b for the rib 9.

FIG. 6 is a diagram showing the case where the present invention is implemented in a cabinet for small equipment. In the figure, the cabinet consists of a control mask 5 and two covers 1a, 1b, and as shown in the figure, the present invention is adopted in both the joints of the control mask 5 and the two covers 1a, 1b. ing. Further, the cover 1a and the cover 1b are connected by engaging the claw 11 and the claw receiver 12. As mentioned above, in the cabinet according to the present invention, the degree of freedom of movement of the covers 1a and 1b is only in the F direction shown in the figure. If sufficient strength is obtained, the illustrated method can provide a sufficiently strong connection, and the connection is extremely simple since there is no need to use screws.

In the embodiments described above, a cylindrical concave surface is formed on the receiving rib of the control mask, and a cylindrical convex surface is formed on the fitting piece of the cover, but the concavo-convex surface does not necessarily have to be cylindrical. The present invention can be effectively implemented even in the case of a spherical shape.

According to the present invention, as described above, it is possible to obtain a cabinet with extremely strong connections without using any screws or with only a very small number of screws, thereby improving the quality of electrical products such as televisions and radios. It is clear that this will make a significant contribution to cost reduction.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the connected portion of a conventional cabinet, Fig. 2 is a cross-sectional view of the main part of the cabinet according to the present invention showing a state in the middle of connection, and Fig. 3 is a view showing the state when the connection is completed. , FIG. 4 is a perspective view showing details of the connection part of the control mask, FIG. 5 is a perspective view showing details of the connection part of the cover, and FIG. 6 is a sectional view showing a cabinet for small equipment in which the present invention is implemented. be. 1... Cover, 2... End edge, 3... Fitting piece, 3
a...Convex surface, 3b...Escape, 4a...Fitting part, 5
...Control mask, 5a... End face portion, 6...
...Edge, 7...Receiving rib, 7a...Concave surface, 8...
Chamfer, 9...rib, 11...claw, 12...claw holder, 13...screw.

Claims (1)

[Scope of utility model registration request] In a cabinet consisting of a control mask and a cover, a receiving rib integrally formed with a concave curved surface with a predetermined radius of curvature is provided near the end face of the control mask, and the receiving rib and the control A fitting portion is provided between the end face portion of the mask, and a convex curved surface having a radius of curvature that is approximately the same as the radius of curvature of the concave curved surface of the receiving rib, which becomes the connecting portion to the control mask, is integrally formed at the tip end of the cover. A fitting piece formed in the shape of the fitting piece is provided, and the center axis of the concave curved surface of the receiving rib is aligned with the edge of the end face portion of the control mask, and the center axis of the convex curved surface of the fitting piece is aligned with the edge of the end face of the cover. The edges of the control mask and the cover are aligned so that the concave and convex curved surfaces are brought into contact with each other, and the control mask and the cover are rotated relative to each other. A cabinet configured to be inserted into a mating part to connect the two.