JPS59204299A - Case of electronic device or the like - 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] This is related to cases such as child devices.

In general, the case of electronic devices, such as the case of a Nokuso pool computer, is generally used to prevent electromagnetic waves generated from external forces from affecting the electronic devices inside the case, or conversely from electronic devices inside the case. In recent years, it has become increasingly necessary to prevent electromagnetic waves from being emitted to the outside. Cases that can shield such electromagnetic waves are conventionally known as cases whose outer surfaces are painted with electromagnetic shielding paint, but since the painted surface has the disadvantage of peeling, recently 'electromagnetic shielding 4'A has been used. A case made by injection molding of plastic with a mixture of different sizes has been developed [Note 1], but the electromagnetic shielding characteristics between the injection gate 1 area and other parts of the case are uneven, and the outer surface of the case is coated with fibers, etc. There was a problem that the electromagnetic shielding material was exposed and the appearance was low.

The first object of the present invention is to provide a case for electronic equipment, etc., which is made of a case part made of blow-molded heat-resistant plastic with electromagnetic shielding properties, and which has uniform electromagnetic shielding properties throughout the case. There is a particular thing. The first object of the present invention is to construct the case part 1η on the two walls, the inner wall is made of thermoplastic resin with electromagnetic wave shielding property, and the outer wall is Blow ratio, v
Our objective is to provide a case for electronics, equipment, etc., which is made of 5-thermal I+J plastic plastic and has excellent appearance characteristics.

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

In FIG. 7, / is a case of a personal computer, and the case / is a combination of the main body λ and the lid 3.
It is joined at. The hinge q is a hinge that is integrally connected to the main body S and the lid 3, and the latch S, which is integrally connected to the lid 3, is connected to the main body λ and the lid 3 using the hinge q as an axis point. U, case / is closed by matching L+93 with the convex part of the receiving part. Further, 7 is an operation panel such as a guitar board and a display section located on the front side of the personal computer.

In FIG. 2, the electronic equipment g of the computer is protected by a case. The main body and the lid 3 each have a hollow double-walled structure, and the inner wall 9 is made of thermoplastic plastic (hereinafter referred to as EMITP) given electromagnetic shielding properties, and the outer wall 9 has electromagnetic shielding properties. It is made of thermoplastic plastic (hereinafter referred to as 1'TP) with a high blowing ratio that does not give any damage.

Moreover, the boundary between the inner wall 7 and the outer wall 10 is located at the outer periphery of the mating surface PL, thereby improving electromagnetic shielding characteristics.

Below, the manufacturing method of the case according to the present invention will be explained based on FIG. 53 and FIG. Cavity a is
A gate-shaped cavity b is formed in the other mold 2.

First, EMITP and TP are melt-kneaded using respective extruders (not shown), and then joined using an extruder (not shown) connected to each extruder. ,?
a7! l'EMITP, and the other semicircle/3b is TP
Extrude the ballisun/3 in the plasticized autumn state consisting of the following. Then,
-The force semicircle/3a is on the convex cavity a side, and the other force 1
'The mold // is held so that the ballison /3 extruded and placed so that the integral part /3b is located on the concave cavity b side is held by the entire circumferential surface of the cavity edge C of mold //, 7.2. ,/
Close 2. The 1F stage of gripping can be done by blowing a Balison/3 or by extruding a large-diameter piece. Next, the ballistic /3 surrounded by the mold //, /,2
Introduce a force fluid such as compressed air into the parison/
3 is expanded to a shape corresponding to that of the convex cavity a and the concave cavity b to form the main body. In addition, when manufacturing a case in which the main body case and the lid body 3 are integrally connected by a hinge as shown in FIG.
As shown in Publication 7q-/'g7''1g93, a hinge is formed by compressing and thinning approximately the middle of parison /3 in the extrusion direction using a protrusion in a mold, and barisons located on both sides of hinge q. By expanding /3, the main body λ and the lid 3 can be constructed.

Electromagnetic wave shielding properties (heat i"if plasticity plastic material M I T l') are plastics that can be blow molded, such as polyethylene, polypropylene, polyamide, AB'S, etc. It is a material made of a mixture of fiber, flake, or powdered carbon, iron, brass, or aluminum, and 4g t+, which is a plastic that itself has electromagnetic shielding properties. EMl, TP, heat iiJ Plastic plastics (e.g. polyethylene,
A fiber made by mixing >700 parts by weight of a polyolefin such as polypropylene with 3 parts of iron, brass or aluminum Ia of thickness SO~/Otsu0/l and length/~Yuto. It is preferable in terms of extrusion II nn 1 ml, bondability within the wire, blow moldability, and electromagnetic wave no/lid properties. In addition, the electromagnetic wave shielding property of EMITP is defined as a volumetric resistance value of /Ω・B or less, preferably /X/0-'! Q - Definitely 1. Also.

Thermoplastic plastic (TP) with a high electromagnetic shielding property is a plastic that can be blow molded with polyethylene, polypropylene, polyamide, A B S <9, and in TP, it has a gray color, red,
In terms of appearance characteristics, plasti made by mixing colors other than black such as blue and yellow σ) fK'+l'l are preferable.

In addition, a high blow ratio of TP indicates that it has excellent elongation in the molten state, and is engraved into a mold by using a thermoplastic with a high IJ ratio of 11'lj. At depth 00~0<1! The Enovos pattern of mu can be almost faithfully reproduced on the case surface, and a case with uniform thickness j1/ can be obtained. Also, the volume resistivity value of TP is 10
It is 5 to 10 Ω·G.

In addition, in the present invention, a case refers to a housing case member, a carrying case member, etc. for a personal computer, a computer, a computer, an electric/electronic device, an electronic music device, etc., and a part of the case, for example, the main body. While the case member of the present invention may be used for some purposes, known case members may be used for other purposes.

In the embodiment described in I-, the main body or the fluid 3, which is the case member, has a hollow, double-walled structure.
The inner wall 9 can be formed with ribs, recesses, etc. suitable for protecting the electronic device g, regardless of the shape of the outer wall 10, and has cushioning properties.

Excellent in terms of lightness. In addition, as shown in Figure 2, E
The boundary between the inner wall 9 made of MT TP and the outer wall made of TP can improve the electromagnetic wave shielding property by the shield located at the outer periphery of the mating plane PL.

As described above, the present invention provides a storage case for electronic devices, etc., which has uniform electromagnetic shielding characteristics over the entire case, and is made of thermoplastic plastic material that has been given an electromagnetic shielding effect, and is made up of a case part that is made of heat-resistant plastic. ) can be done, and also,
The case member is made of double walls ('4''), the inner wall is made of thermoplastic plastic that has been given electromagnetic shielding properties, and the outer wall is made of thermoplastic plastic with a high blow ratio. , excellent appearance 'J, 'rljl-'i, consisting of
ii) A storage case for r-devices etc. can be obtained. In addition, the outer wall of the case member according to the present invention is made of thermoplastic plastic with a high blow ratio. It can be reproduced and configured on the exterior wall.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a case according to the present invention, FIG. 1 is a sectional view of the main part of FIG. This is a schematic diagram. / Case unit for electronic equipment, etc. Main body 3 Lid body? Inner wall 10 Outer wall Fig. 3

Claims (1)

[Scope of Claims] /) A case for electronic equipment, etc., characterized in that the case is made of a case part A which is blow-molded from a thermoplastic plastic that exhibits electromagnetic wave shielding properties. 2) The case part is constructed with a double wall, and the inner wall is made of electromagnetic wave flux (uniform thermal rrf plasticity).
The outer wall is made of high blow ratio thermal plastics. '1 Case for electronic equipment, etc. as set forth in Claim No./Claim AI2.