Housing having electromagnetic wave shielding and waterproof structure

• US 6,822,161 B2
• Filed: 11/05/2003
• Issued: 11/23/2004
• Est. Priority Date: 11/06/2002
• Status: Expired due to Fees

• Current Assignee: Mitsuya Co., Ltd., NEC Corporation
• Original Assignee: Mitsuya Co., Ltd., NEC Corporation
• Inventors: Kusama, Hidekazu, Komatsu, Kazuo
• Primary Examiner(s): Ngo, Hung V.
• Application Number:
  US10/700,631
• Publication Number:
  US 20040188120A1
• Time in Patent Office: 384 Days
• Field of Search: 174/35.GC, 361/818, 361/800, 361/816, 277/920
• US Class Current: 174/367
• CPC Class Codes: H05K 5/061 sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing
• CPC Class Codes: H05K 9/0015 Gaskets or seals
• CPC Class Codes: H05K 9/0073 Shielding materials H05K9/0003 takes precedence
• CPC Class Codes: Y10S 277/92 Seal including electromagnetic shielding feature

Abstract

In a housing having a sealing structure providing an electromagnetic wave shielding function and a waterproof function between first and second housing components (1, 2) which define a space therebetween, the sealing structure includes a groove portion (12) made in the first housing component to extend around the space, a first seal member (13) formed by being directly applied into the groove portion, a second seal member (14) formed by being applied onto the first seal member, and a pressing portion (16) formed on the second housing component to correspond to the groove portion. The first seal member has relatively low hardness to be compressible. The second seal member has relatively high hardness, flexibility, and conductivity. When the first and second housing component are combined to each other, the pressing portion pressingly deforms the second seal member so as to be brought into surface contact with the second seal member. The first and second housing component are made of magnetic metal.

Claims

1. A housing comprising:

a first housing component made of magnetic metal and having a first surface;

a second housing component made of magnetic metal and having a second surface confronting said first surface, said second housing component being cooperated with said first housing component to define a space; and

a sealing structure providing an electromagnetic wave shielding function and a waterproof function between said first and second housing components,

said sealing structure comprising;

a groove portion formed on said first surface and extending around said space;

a first seal member formed by being directly applied into said groove portion, said first seal member having relatively low hardness to be compressible;

a second seal member formed by being applied onto said first seal member, said second seal member having relatively high hardness, flexibility, and conductivity; and

a pressing portion formed on said second surface to correspond to said groove portion, said pressing portion pressingly deform said second seal member so as to be brought into surface contact with said second seal member.

2. The housing according to claim 1, further comprising a joining member clamping said first and second housing components in mutually approaching directions to join them together.

3. The housing according to claim 2, wherein said joining member comprises a screw engaging with said first and second housing components.

4. The housing according to claim 1, wherein said first seal member is formed so as not to project from said first surface, while said second seal member is formed so as to project from said first surface.

5. The housing according to claim 1, wherein said first seal member comprises soft silicon.

6. The housing according to claim 1, wherein said first seal member comprises a high-molecular soft material having moisture resistance.

7. The housing according to claim 1, wherein said second seal member comprises hard silicon and a metal filler added to said hard silicon.

8. The housing according to claim 1, wherein said pressing portion comprises a projecting portion projecting from said second surface and inserted into said groove portion so as to be brought into contact with said second seal member.

9. The housing according to claim 8, wherein said second seal member is pressed against said projecting portion by a restoring force of said first seal member.

10. The housing according to claim 1, wherein said first housing component is a box having an opening on one side thereof and substantially forming said space, said second housing component being a cover which closes said opening.

11. The housing according to claim 1, wherein said second housing component is a box having an opening on one side thereof and substantially forming said space, said first housing component being a cover which closes said opening.

12. The housing according to claim 1, wherein said second seal member has a surface which is matched with a surface of said pressing portion when pressingly deformed by said pressing portion.