JPH08213765A - Frame structure of electronic apparatus - Google Patents

Abstract

PURPOSE: To provide a frame structure for an electronic apparatus with an advantage of use of a plastic case manufactured at low cost without generating abnormal deformation of a button hooking member in molding. CONSTITUTION: In a frame structure for an electronic apparatus, at least one tongue-shaped flexible button nail 2 is molded at the front of a plastic case 1. An electric switch is mounted on the rear side near to an end part 2b of the button nail 2, and a push button 2c at the end part 2b on a front side is operated manually. A base part of the button nail 2 has a deformation preventive hole for preventing compressional deformation in molding. In addition, a reinforcement rib elongated across the button nail 2 is formed in a body on the rear side of the base part 2a of the button nail 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic equipment casing structure, and more particularly to an improvement of a structure in which a button claw for operating an electric switch is integrally formed on a front portion of a plastic case.

[0002]

2. Description of the Related Art As is well known, in an electronic equipment housing structure such as a cable broadcasting terminal equipment as shown in FIGS. 4 and 5, an electronic equipment housing may be molded by plastic molding. , Such a plastic case 1
In A, a tongue-shaped flexible button claw 2A is integrally formed on the front wall portion 1a of the plastic case 1A, and the electric switch 3A incorporated inside the plastic case 1A is indirectly connected via these button claws 2A. It may be operated externally.

That is, the front wall portion 1 of the plastic case 1A
Although a plurality of button claws 2A for integrally molding the base portion 2a with the front wall portion 1a are arranged in a, as shown in FIG. 5, on the back side of the tip end portions 2b of these button claws 2A, as shown in FIG.
Printed wiring board 4A inside plastic case 1A
The electric switches 3A mounted on each are exposed.

Push buttons 2c which can be pushed by a fingertip are formed on the front surface side of the tip end portion 2b of each button claw 2A, and these push buttons 2c are formed on a decorative panel 5A which covers the outer surface of the front wall portion 1a. The corresponding button hole 6A is penetrated so that the push button 2c can be pressed from the outside.

[0005]

By the way, according to the structure of the button claw 2A having such a structure, as shown in FIG. 5, the button to be molded into the state shown by the solid line by the contraction deformation at the time of molding the plastic case 1A. In many cases, the claw 2A is deformed and shaped as shown by an imaginary line. That is, the cause of such deformation is due to the sink mark of the base portion 2a of the button claw 2A which is a sudden change portion of the resin flow path cross section, but when such a deformation occurs, the button claw 2A and the electric switch 3 are formed.
Not only does this cause a malfunction of the electric switch 3A, but in a significant case, the push button 2c of the button claw 2A interferes with the corresponding button hole 6A and the product yield decreases.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional electronic equipment housing structure as described above.
An object of the present invention is to obtain an electronic device housing structure that fully exhibits the characteristics of a plastic case whose product cost is low and does not cause abnormal deformation of button claws during molding.

[0007]

To achieve this object, according to the present invention, at least one tongue-like flexible button claw is integrally molded on the front part of a plastic case, and the tip part of the button claw is shifted toward the front part. In a housing structure of an electronic device in which an electric switch is faced to the back side of the device and a push button provided on the surface of the tip end thereof is manually operated, a deformation prevention hole capable of preventing contraction deformation at the time of molding is formed in the base part of the button claw. At the same time, the present invention proposes an electronic device housing structure in which a reinforcing rib extending in a direction perpendicular to the button claw is integrally formed on the back side of the base portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described below with reference to FIGS. The illustrated embodiment is an example applied to a cable broadcasting terminal device. In a front wall portion 1a of a plastic case 1 injection-molded with resin, a plurality of button claws integrally forming a base portion 2a on the front wall portion 1a. Although two are placed,
As shown in FIG. 2, the electric switches 3 mounted on the printed wiring board 4 inside the plastic case 1 are respectively exposed on the back side of the tip portions 2b of the button claws 2 as in the conventional case. is there.

Further, push buttons 2c which can be pushed by fingertips are respectively formed on the surface side of the tip end portion 2b of each button claw 2 as in the conventional case, and these push buttons 2c are formed on the front wall portion 1.
Corresponding button hole 6 formed in the decorative panel 5 covering the outer surface of a
The corresponding electric switch 3 can be operated by pressing these push buttons 2c.

In the illustrated embodiment, the deformation preventing holes 7 are formed in the base portions 2a of the button claws 2, respectively, and the deformation of the base portion 2a of the push button 2c by forming these deformation preventing holes 7 in the front wall portion 1a. As the stress is relieved,
A pair of reinforcing ribs 8 oriented at right angles to the button claws 2 are integrally formed on the back side of the button claws 2 on both sides of each deformation prevention hole 7.

Since the electronic equipment casing structure of the illustrated embodiment has the above-mentioned structure, the deformation preventing hole 7 is formed in the base portion 2a of each button claw 2 to prevent the contraction deformation strain of the base portion 2a. The deformation of the base portion 2a, whose cross section is substantially reduced, is reliably prevented by the reinforcing rib 8 having a large cross-section quadratic coefficient, which is oriented at a right angle to the button claw 2. Therefore, according to the illustrated structure, the contraction deformation of the button claw 2 at the time of molding the button claw 2 is eliminated, so that not only the malfunction of the electric switch 3 and the yield of the plastic case 1 can be improved, but also the deformation preventing hole 7 and the reinforcing rib 8 are provided. The addition of does not increase the product cost.

[0012]

As is apparent from the above description, according to the present invention, the cost of the product does not become expensive due to the addition of the deformation preventing hole and the reinforcing rib, and the button claw is abnormally deformed when the plastic case is molded. Since it is possible to reliably prevent this, there is an effect that the product yield can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged exploded perspective view of a main part of an electronic device housing structure according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of the electronic device housing structure.

FIG. 3 is an enlarged perspective view of a button claw viewed from the back side.

FIG. 4 is an enlarged exploded perspective view of a main part of a conventional electronic device housing structure.

FIG. 5 is an enlarged cross-sectional view of a main part of the electronic device housing structure.

[Explanation of symbols]

 1 Plastic Case 1a Front Wall 2 Button Claw 2a Base 2b Tip 2c Push Button 3 Electric Switch 7 Deformation Prevention Hole 8 Reinforcing Rib

Claims (1)

[Claims] 1. A plastic case is integrally formed with at least one tongue-shaped flexible button claw, and an electric switch is made to face the rear side of the button claw near the tip, and the surface of the tip is formed. In an electronic device housing structure for manually operating a push button provided in a base plate, a deformation prevention hole that can prevent thermal deformation during molding is formed in the base of the button claw, and the back side of the base claw is perpendicular to the button claw. An electronic device housing structure, characterized in that reinforcing ribs extending in the same direction are integrally molded.