JPH08222863A - Case for electronic apparatus - Google Patents

Abstract

PURPOSE: To provide a case for electronic apparatus which can prevent the breakage of such parts as the substrate, etc., and the part fitting leg itself and, at the same time, which does not increase the numbers of parts and assembly processes. CONSTITUTION: In the case for an electronic apparatus composed of an upper case 24 and a lower case 26 and fitting legs 32 and 34 are respectively provided to the upper and lower cases 24 and 26 so that parts can be held and fixed between the fitting legs 32 and 34 of the upper and lower cases 24 and 26, the case is formed in a molded double-layer structure composed of an internal layer 20 of thermoplastic resin and an external layer 30 of thermoplastic elastic resin and the legs 32 and 34 of the upper and lower cases 24 and 26 are integrally formed with the cases 24 and 26 by extending and protruding the external resin layer 30 to and toward the inside of the case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an electric equipment case having a two-part shape as a two-layer molded structure composed of an inner thermoplastic resin layer and an outer thermoplastic elastic resin layer, and has an outer thermoplastic elastic layer. The present invention relates to an electric equipment case in which a component mounting leg having elasticity is formed by extending and projecting resin into the case.

[0002]

2. Description of the Related Art Conventionally, as a structure for mounting a substrate inside a case of an electric device such as a portable radio transmitter, as shown in FIGS. 2 consisting of case 12
Inside the split-shaped electric device case 14, the mounting legs 16 and 18 are formed integrally with the case, respectively.
There is known a structure in which a component such as a substrate 20 is sandwiched and fixed between the mounting leg 16 of 0 and the mounting leg 18 of the lower case 12.
The mounting legs 16 and 18 and the substrate 20 are joined and fixed with an adhesive or the like.

Further, as shown in FIG. 6, there is known a structure in which mounting legs 16a and 18a formed of a soft material such as rubber are provided inside the case in order to protect components such as the substrate 20. .

[0004]

However, FIG. 4 and FIG.
In the structure shown in (1), the mounting legs 16 and 18 are hard, and the components such as the substrate 20 are cracked due to the impact when the device is dropped, and the mounting legs are fragile, so that the mounting legs are cracked.
Further, although the structure shown in FIG. 6 is strong against an impact such as a drop of a device, since the mounting legs 16a and 18a are required as separate parts from the case, the number of parts and the number of assembling steps increase. Further, there is a possibility that the adhesive portion between the case and the mounting leg may peel off.

The present invention has been made in view of the above points, and an object of the present invention is to provide a two-layer molded structure including a case having a split shape and an inner thermoplastic resin layer and an outer thermoplastic elastic resin layer. By integrally molding the mounting legs with the outer thermoplastic elastic resin, it is possible to prevent damage to components such as the board and the component mounting legs themselves, and the number of components and the number of assembly steps do not increase. It is to provide an electric equipment case.

[0006]

In order to achieve the above object, the electric equipment case of the present invention is provided with mounting legs inside the electric equipment case composed of an upper case and a lower case, respectively. In an electric equipment case in which parts are sandwiched and fixed between a leg and a mounting leg of a lower case, the electric equipment case is provided with an inner thermoplastic resin layer (so-called plastic layer) and an outer thermoplastic elastic resin layer. (A so-called elastomer layer), and a mounting leg is integrally formed with the case by extending and projecting the outer thermoplastic elastic resin into the electric equipment case.

In the above electric equipment case, instead of sandwiching and fixing the component between the mounting leg of the upper case and the mounting leg of the lower case, the inside of the tip of the mounting leg of the lower case and / or the upper case is replaced. A notch may be provided on the inner side of the tip of the mounting leg, and the component end may be held and fixed in the notch. Further, the electric equipment case of the present invention is suitable for mounting a substrate as a component, but other components such as a transformer can also be mounted.

In the electric equipment case of the present invention, the thermoplastic resin layer is made of a material selected from the group consisting of ABS resin, polycarbonate resin, polypropylene resin and polyacetal resin, and the thermoplastic elastic resin layer is olefin resin. It is made of a material selected from the group consisting of elastomers, polyether elastomers and polyester elastomers.

[0009]

Since the entire case is covered with the elastic material layer (elastomer layer), the shock is easily absorbed when the case is dropped or an object hits the case. Further, since the elastic material (elastomer) on the surface side of the case is extended to the inside of the case to form the mounting leg, the elastic material, that is, the appropriate elasticity of the thermoplastic elastic resin causes the mounting leg to act as a cushioning material.

[0010]

EXAMPLES The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited to the following examples, and various modifications can be made as appropriate. Embodiment 1 FIG. 1 is a vertical cross-sectional view of one embodiment of the electric equipment case of the present invention,
FIG. 2 is an exploded perspective view of the same. This electrical equipment case 22
Is a two-layer molding structure having an upper case 24 and a lower case 26 in a two-part shape, and an inner thermoplastic resin layer (plastic layer) 28 and an outer thermoplastic elastic resin layer (elastomer layer) 30. is there.

Then, the outer thermoplastic elastic resin is extended / protruded to the inside of the electric equipment case, and the upper mounting leg 32 and the lower mounting leg 34 for mounting the substrate 20 are mounted.
Is formed integrally with the case. When the board 20 is sandwiched and fixed between the elastic mounting legs 34 of the lower case and the elastic mounting legs 32 of the upper case, the mounting legs 32 and 34 made of a thermoplastic elastic resin have an appropriate elasticity, so that the mounting legs are secured. Acts as a cushioning material and can prevent damage to the board and the mounting legs themselves. 36 is an engaging groove inside the lower case 26, and 38 is an engaging piece inside the upper case 24.

1 and 2, the case where the board 20 is mounted in the case of the electric device has been described, but the invention is not limited to the mounting of the board, and other parts to be arranged inside the case, for example, a part such as a transformer, etc. The present invention can be applied to mounting and the like. Further, although the case shows the upper and lower split shapes, the left and right split shapes may also be used.

Embodiment 2 In this embodiment, as shown in FIG. 3, the mounting leg 34 of the lower case is used.
The stepped portion is formed by providing the notch 40 inside the front end of the substrate, and the end of the component such as the substrate 20 is fitted and held in the notch 40 to be fixed. The notch may be provided on the mounting leg of the upper case, or may be provided on both the lower case and the upper case. Other configurations and operations are the same as the first embodiment.
Is the same as

[0014]

Since the present invention is configured as described above, it has the following effects. (1) Since the mounting leg is integrally formed with the case by extending the thermoplastic elastic resin (elastomer) on the surface of the case to the inside of the case, the mounting leg has a cushioning material due to the appropriate elasticity of the thermoplastic elastic resin. As a result, it is possible to prevent damage to components such as the substrate. In addition, it is possible to prevent the mounting leg itself from being damaged. (2) Since the mounting leg is integrally formed with the thermoplastic elastic resin layer on the outside of the case, the number of parts is reduced and the number of assembly steps is reduced. (3) Since the entire case is covered with the thermoplastic elastic resin layer, it is possible to absorb the impact applied to the case. Therefore, even if the case falls,
The effect of (1) can be fully exhibited.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an electric device case of the present invention.

FIG. 2 is an exploded perspective view of the electric device case in FIG.

FIG. 3 is a vertical cross-sectional view showing another embodiment of the electric equipment case of the present invention.

FIG. 4 is a vertical sectional view showing an example of a conventional electric device case.

5 is an exploded perspective view of the electric device case in FIG.

FIG. 6 is a vertical cross-sectional view showing another example of a conventional electric device case.

[Explanation of symbols]

 20 Substrate 22 Electrical Equipment Case 24 Upper Case 26 Lower Case 28 Thermoplastic Resin Layer (Plastic Layer) 30 Thermoplastic Elastic Resin Layer (Elastomer Layer) 32 Upper Mounting Leg 34 Lower Mounting Leg 40 Notch

Claims (4)

[Claims] 1. An electric machine in which a mounting leg is provided inside an electric device case including an upper case and a lower case, and parts are sandwiched and fixed between the mounting leg of the upper case and the mounting leg of the lower case. In the equipment case, the electric equipment case is formed as a two-layer molded structure including an inner thermoplastic resin layer and an outer thermoplastic elastic resin layer, and the outer thermoplastic elastic resin is extended / projected into the electric equipment case. An electric device case characterized in that the mounting legs are integrally formed with the case. 2. Instead of sandwiching and fixing the component between the mounting leg of the upper case and the mounting leg of the lower case, the inner side of the mounting leg of the lower case and / or the distal end of the mounting leg of the upper case. 2. The electric device case according to claim 1, wherein a notch is provided inside, and the end of the component is held and fixed in the notch. 3. The electric device case according to claim 1, wherein the component is a substrate. 4. The thermoplastic resin layer is made of a material selected from the group consisting of an ABS resin, a polycarbonate resin, a polypropylene resin and a polyacetal resin, and the thermoplastic elastic resin layer is an olefin elastomer or a polyether elastomer. The electric equipment case according to claim 1, 2 or 3, which is made of a material selected from the group consisting of: and a polyester-based elastomer.