JPH1041645A - Casing for electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive casing for an electronic apparatus by the acquisition of good waterproofness and electric shield effect, and the cost down by productivity improvement, and the reduction of the number of parts. SOLUTION: A casing for an electronic apparatus is made by plastic molding, and in this casing for an electronic apparatus comprising the main body 2 to mount an electronic apparatus and a cover 3 having the function of electric shield and sealing the the main body 2, the cover 3 has a bend around and besides in the direction of the main body, and a waterproof packing member 3a is made at least outside this bend, and for the main body 2, a lock to lock the waterproof packing member 3a of the cover 3 is made inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment comprising a main body formed by plastic molding and mounting electronic equipment, and a lid having a function of an electric shield and hermetically closing the main body for waterproofing. It is about the body.

[0002]

2. Description of the Related Art A portable wireless device will be described as an example of electronic equipment. FIG. 24 shows a prior art of a portable wireless device and a waterproof lid used for the portable wireless device. Until now, a known waterproof packing such as JISB2
There was a main body 22 having a structure in which it was bonded and fixed to the packing groove 21 using the O-ring 23 in 401. This body 22
In addition, the metal plate 24 waterproofs and electrically shields the main body 22.

Further, Japanese Patent Application Laid-Open Nos. 2-174351, 6-29684, and 5-22685
In the document disclosed in Japanese Patent Publication No. 1 (1999), a packing is formed by integrally molding an elastomer resin in a resin case, or a small hole is provided as a method of increasing the fixing strength to prevent separation of the elastomer resin fixed to the case. Was.

[0004]

The conventional structure shown in FIG. 24 has the following problems. Known O
When the ring 23 is used, the metal plate 24 must be thickened in order to overcome the repulsive force, which is an alienating factor in reducing the weight of the device. This has been an alienation factor for density packaging.

Further, Japanese Patent Application Laid-Open Nos. 2-174351, 6-29684, and 5-22685
In the method disclosed in Japanese Patent Laid-Open Publication No. 1 (1993), since the lid is made of resin, the purpose of the electric shield cannot be fulfilled, or the fixing strength between the lid and the resin is insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a good waterproof and electric shielding effect, a cost reduction by improving productivity, and an inexpensive housing for electronic equipment by reducing the number of parts. The purpose is to provide the body.

[0007]

A housing for electronic equipment according to the present invention is formed by plastic molding and has a main body on which electronic equipment is mounted, a lid having an electric shield function and hermetically sealing the main body. Wherein the lid has a bent portion around and in the direction of the main body, a waterproof packing member is formed at least outside the bent portion, and the main body has the lid inside. And a locking portion for locking the waterproof packing member.

Further, the lid is subjected to a rust-proof treatment.

Further, the waterproof packing member is formed in a U-shape at the bent portion of the lid.

The waterproof packing member is made of an elastomer resin.

Further, an elastomer resin is molded and fixed to the bent portion of the lid with a primer.

Further, a plurality of openings are provided in the bent portion of the lid, and the elastomer resins are fixed to each other through the openings.

Further, the opening has a flat shape that is long in the circumferential direction of the bent portion.

The opening is a notch.

Further, the notch is a trapezoidal notch having a short side on the opening side.

Further, the notch is a circular notch whose opening side is shorter than the inner diameter.

Further, a plurality of flat-shaped punches which are long in the circumferential direction of the bent portion are provided in the bent portion of the lid.

Further, a plurality of hook portions in which the bent portion of the lid is further partially inclined are provided in the peripheral direction of the bent portion.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG. 1 is a perspective view showing a housing for an electronic device according to a first embodiment of the present invention, and FIG. 2 is a diagram showing an operation of packing. FIG. 3 is a perspective view showing the waterproof lid. Reference numeral 1 denotes a waterproof seal surface, and the main body 2 is formed with the waterproof seal surface. A primer is applied to the metal plate 3b, and the packing 3a is fixedly formed on the metal plate 3b by integral molding using a thermoplastic elastomer resin by injection molding. The packing 3a is formed in a U-shape so as to surround the bent portion of the metal plate 3b. As described above, the waterproof sealing surface 1 which is the surface to receive the waterproof packing 4 is provided on the inner periphery of the main body 2, and the metal plate 3b as the waterproof lid 3 is made of a thin plate and has a high strength by plastic working.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. As the packing 3a, an olefin-based thermoplastic elastomer resin was used. The primer needs to contain no component that cures the elastomer resin from its use.
A mixed solution of 10% by weight of polyvinyl butyral, 22% by weight of n-butyl alcohol, and 68% by weight of isopropyl alcohol was prepared. Solution B contained 18% by weight of phosphoric acid and 1% of water.
Solution A 15: B solution 1 was mixed with a mixed solution of 6% by weight and 66% by weight of isopropyl alcohol.

Incidentally, the metal plate 3b for the waterproof lid of the housing for electronic equipment is usually used after the surface is rust-proofed by a treatment such as nickel plating. Therefore, since the packing 3a has a weak adhesion to nickel plating or the like, by applying the above-mentioned primer in advance, it reacts with the metal surface and the adhesion can be improved.

The hardness of the elastomer resin is desirably 30 to 60 degrees A for the purpose of waterproofing, and is not limited to the above-mentioned olefin-based thermoplastic elastomer resin, but may be a styrene-based thermoplastic elastomer resin or a thermoplastic polyurethane. Elastomers, thermoplastic polyurethane / PVC copolymers, or polyamides may be used. The primer needs to contain no component for curing the above-mentioned elastomer resin due to its use, and the liquid A contains 10% by weight of polyvinyl butyral, 22% by weight of n-butyl alcohol, and 68% by weight of isopropyl alcohol. A mixed solution of 18 wt% of phosphoric acid, 16 wt% of water, and 66 wt% of isopropyl alcohol was mixed with Liquid B at a weight ratio of Liquid A 15: Liquid 1.

Further, as the elastomer resin, a fluoroelastomer resin may be used. In that case, the primer needs to contain no component for curing the elastomer resin because of its use, and is used for coating with chromic acid. Wash primers were used.

Embodiment 2 FIG. 4 is a perspective view illustrating a waterproof cover of an electronic device housing according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a state where an elastomer resin is fixed to a bent portion of a metal plate in the waterproof cover of FIG. FIG. FIG. 6 is a perspective view of the structure of the metal plate of the waterproof lid of FIG. 4, and FIG. 7 is an enlarged perspective view showing a main part of the metal plate of FIG.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. Metal plate 3
In FIG. 2B, a notch hole was formed in the bent portion, and the elastomer resins were welded and fixed to each other to improve the strength. It is appropriate to form a notch hole having a diameter of about 1 mm from the fluidity of the resin. When the cutout holes are provided as many as possible, the fixing strength between the elastomer resins is improved.

Embodiment 3 FIG. 8 is a perspective view showing a waterproof lid of an electronic device housing according to a third embodiment of the present invention. FIG. 9 is a cross-sectional view showing a state where an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. FIG. FIG. 10 is a perspective view showing the structure of the metal plate of the waterproof lid of FIG. 8, and FIG. 11 is an enlarged perspective view showing a main part of the metal plate of FIG.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. Metal plate 3
In (b), an elliptical hole was formed in the bent portion, and the elastomer resins were welded and fixed to each other to improve the strength. It is appropriate to form a hole of about 1 mm × 10 mm in the oblong hole from the fluidity of the resin. Providing as many oblong holes as possible improves the bonding strength between the elastomer resins. In addition,
As long as the oblong hole is not only an elliptical shape but also a long hole having a flat shape, any hole may be used as long as fluidity of the resin is considered.

Embodiment 4 FIG. 12 is a perspective view showing a waterproof lid of an electronic device housing according to a fourth embodiment of the present invention. FIG. 13 is a cross-sectional view showing a state where an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. FIG. FIG. 14 is a perspective view showing the structure of the metal plate of the waterproof lid of FIG. 12, and FIG. 15 is an enlarged perspective view showing a main part of the metal plate of FIG.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. Metal plate 3
In (b), a trapezoidal cutout hole having a short side on the opening side was formed in the bent portion, and the elastomer resins were welded and fixed together to improve the strength. It is appropriate that the trapezoidal cutout hole has a height of 1 mm × a lower side of 10 mm and an elevation angle of 60 ° or less in view of the fluidity of the resin. If the trapezoidal cutout holes are provided with as many holes as possible, the bonding strength between the elastomer resins is improved.

Embodiment 5 FIG. 16 is a perspective view showing a waterproof cover of an electronic device housing according to a fifth embodiment of the present invention. FIG. 17 is a cross-sectional view showing a state in which an elastomer resin is fixed to a bent portion of a metal plate in the waterproof cover of FIG. FIG. FIG. 18 is a perspective view showing the structure of the metal plate of the waterproof lid of FIG. 16, and FIG. 19 is an enlarged perspective view showing a main part of the metal plate of FIG.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. Metal plate 3
b, at the bending portion, partially further bending,
Elastomer resins were welded and fixed together to improve strength. The greater the number of bends provided, the better the bonding strength between the elastomer resins.

Embodiment 6 FIG. FIG. 20 is a perspective view showing a waterproof lid of an electronic device housing according to a sixth embodiment of the present invention. FIG. 21 is a cross-sectional view showing a state where an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. FIG. FIG. 22 is a perspective view showing the structure of the metal plate of the waterproof lid of FIG. 20, and FIG. 23 is an enlarged perspective view showing a main part of the metal plate of FIG.

The metal plate 3b is made of a general rolled steel plate SPCC-
Using a 0.5 mm SD thickness, the periphery is drawn and bent by plastic working to improve strength. The metal plate 3b is not limited to a general rolled steel plate, and may be made of any material such as aluminum, copper, brass, etc., as long as the material can be bent around by plastic working. Metal plate 3
An elliptical undercut is formed in the bent portion b to prevent the elastomer resin from separating from the metal plate 3b.

[0035]

As is apparent from the above description, according to the present invention, a main body formed by plastic molding and mounting an electronic device, and a lid having a function of an electric shield and hermetically sealing the main body are provided. In the electronic device housing, the lid has a bent portion around and in the body direction, and a waterproof packing member is formed at least outside the bent portion,
The main body has a locking part for locking the waterproof packing member of the lid inside, so that a reliable waterproofing effect of the housing for electronic equipment can be obtained, stable performance can be sufficiently secured, and production efficiency can be secured. And the housing for electronic equipment can be manufactured at low cost.

In addition, by providing the lid with a rustproofing treatment, it is possible to prevent the occurrence of rust as well as the waterproof effect.

Further, since the waterproof packing member is formed in a U-shape at the bent portion of the lid, the waterproof effect of the waterproof packing member is further improved.

Further, since the waterproof packing member is made of an elastomer resin whose molding temperature is lower than that of plastic, it is possible to perform secondary molding after forming the main body made of plastic, and to manufacture the housing for electronic equipment. It is convenient in the process.

Further, by forming and fixing an elastomer resin to the bent portion of the lid with a primer, the bonding strength between the bent portion of the lid and the thermoplastic elastomer resin is improved. In particular, the effect is great when the lid is nickel-plated.

Further, since a plurality of openings are provided in the bent portion of the lid, the elastomer resins can be fixed to each other through the openings, and the bonding strength between the elastomer resin and the bent portion of the lid can be reduced. It can be further improved.

In addition, since the opening has a flat shape that is long in the circumferential direction of the bent portion, the area for fixing the elastomer resin to each other is increased, and the fixing strength between the bent portion of the elastomer resin and the lid can be further improved. it can.

Further, since the opening is a cut-out portion, the elastomer resin is filled in the cut-out portion even if the fluidity of the elastomer resin is somewhat poor, and the adhesion strength between the elastomer resin and the bent portion of the lid is secured. can do.

Further, since the notch is a trapezoidal notch having a short side on the opening side, the fixed elastomer resin is less likely to be detached from the bent portion of the lid.

Further, since the cut-out portion is a circular cut-out portion whose opening side is shorter than the inner diameter, the fixed elastomer resin is less likely to be separated from the bent portion of the lid, and the cut-out portion is formed. Is circular, so that the notch can be easily filled with the elastomer resin.

Further, by providing a plurality of flattened dents extending in the circumferential direction of the bent portion at the bent portion of the lid, the fixed elastomer resin is less likely to be detached from the bent portion of the lid.

Further, by providing a plurality of hook portions in which the bent portion of the lid is further partially inclined in the circumferential direction of the bent portion, the fixed elastomer resin is less likely to be detached from the bent portion of the cover. Become.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a housing for an electronic device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation of a packing of the electronic device housing of FIG. 1;

3 is a perspective view showing a waterproof lid of the electronic device housing of FIG. 1;

FIG. 4 is a perspective view showing a waterproof lid of an electronic device housing according to a second embodiment of the present invention.

FIG. 5 is a partial detailed view showing a cross-sectional state of an elastomer resin fixed to a bent portion of a metal plate in the waterproof lid of FIG. 4;

6 is a perspective view of a structure of a metal plate of the waterproof lid of FIG.

FIG. 7 is an enlarged perspective view showing a main part of the metal plate of FIG. 6;

FIG. 8 is a perspective view illustrating a waterproof lid of an electronic device housing according to a third embodiment of the present invention.

9 is a partial detailed view showing a state in which an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. 8 in a cross section.

FIG. 10 is a perspective view showing a structure of a metal plate of the waterproof lid of FIG. 8;

FIG. 11 is an enlarged perspective view showing a main part of the metal plate of FIG. 10;

FIG. 12 is a perspective view illustrating a waterproof lid of an electronic device housing according to a fourth embodiment of the present invention.

FIG. 13 is a partial detailed view showing a cross-sectional state of an elastomer resin fixed to a bent portion of a metal plate in the waterproof lid of FIG.

FIG. 14 is a perspective view showing a structure of a metal plate of the waterproof lid of FIG.

FIG. 15 is an enlarged perspective view showing a main part of the metal plate of FIG. 14;

FIG. 16 is a perspective view showing a waterproof lid of an electronic device housing according to a fifth embodiment of the present invention.

FIG. 17 is a partial detailed view showing a cross section of a state in which an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. 16;

18 is a perspective view showing a structure of a metal plate of the waterproof lid of FIG.

19 is an enlarged perspective view showing a main part of the metal plate of FIG. 18;

FIG. 20 is a perspective view showing a waterproof lid of an electronic device housing according to a sixth embodiment of the present invention.

21 is a partial detailed view showing a state in which an elastomer resin is fixed to a bent portion of a metal plate in the waterproof lid of FIG. 20 in a cross section.

FIG. 22 is a perspective view showing a structure of a metal plate of the waterproof lid of FIG. 20.

FIG. 23 is an enlarged perspective view showing a main part of the metal plate of FIG. 22;

FIG. 24 is a perspective view showing the structure of a conventional portable wireless device housing.

[Explanation of symbols]

1 Packing surface, 2 main body, 3 waterproof lid, 3a packing, 3b metal plate.

Claims (12)

[Claims] 1. An electronic device housing formed by plastic molding and including a main body on which an electronic device is mounted and having a function of an electric shield, and a lid for hermetically sealing the main body. And a bent portion is formed in the direction of the main body, a waterproof packing member is formed at least outside the bent portion, and the main body has a locking portion for locking the waterproof packing member of the lid inside. An electronic device housing characterized by the above-mentioned. 2. The electronic device casing according to claim 1, wherein a rust-proofing treatment is applied to the lid. 3. The electronic device housing according to claim 1, wherein the waterproof packing member is formed in a U-shape at a bent portion of the lid. 4. The housing for an electronic device according to claim 3, wherein the waterproof packing member is made of an elastomer resin. 5. The electronic device casing according to claim 4, wherein an elastomer resin is molded and fixed to the bent portion of the lid with a primer. 6. The electronic device casing according to claim 4, wherein a plurality of openings are provided in the bent portion of the lid, and the elastomer resins are fixed to each other through the openings. 7. The housing for an electronic device according to claim 6, wherein the opening has a flat shape that is long in a circumferential direction of the bent portion. 8. The electronic device casing according to claim 6, wherein the opening is a notch. 9. The electronic device casing according to claim 8, wherein the notch is a trapezoidal notch having a short side on an opening side. 10. The electronic device casing according to claim 8, wherein the cutout portion is a circular cutout portion whose opening side is shorter than the inside diameter. 11. The electronic device casing according to claim 4, wherein a plurality of flattened dents extending in the circumferential direction of the bent portion are provided in the bent portion of the lid. 12. The electronic device housing according to claim 4, wherein a plurality of hook portions, in which the bent portion of the lid is further partially inclined, are provided in a peripheral direction of the bent portion.