Waterproof structure

• US 20080081679A1
• Filed: 09/10/2007
• Published: 04/03/2008
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: Casio Hitachi Mobile Communications Company Limited (NEC Corporation)
• Inventors: Baba, Takeru, Yamaguchi, Tsutomu, Kato, Shigeru, Kawasaki, Yasuhiko, Murakami, Toshiyuki
• Granted Patent: US 7,941,196 B2
• Time in Patent Office: Days
• US Class Current: 455/575.8
• CPC Class Codes: H04B 1/3888 Arrangements for carrying or protecting transceivers
• CPC Class Codes: H04M 1/0249 Details of the mechanical connection between the housing parts or relating to the method of assembly
• CPC Class Codes: H04M 1/18 Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment H04M1/19 takes precedence

Abstract

A waterproof structure for a casing has a first casing, a second casing to be put together with the first casing, and a waterproof member formed of an elastic material to prevent water from penetrating between the first casing and the second casing. The second casing has a recess. The waterproof member has a peripheral part which, when fitted into the recess, prevents penetration of water. The peripheral part is provided at the periphery of the waterproof member, which is laid out all around space between the first casing and the second casing. A projection engages with a dent. A restriction part of the first casing, provided at a position facing the peripheral part and protruding toward the second casing, prevents the peripheral part from coming out.

Claims

1. A waterproof structure for a casing, comprising:

a first casing;

a second casing to be put together with the first casing;

a waterproof member formed of an elastic material to prevent water from penetrating between the first casing and the second casing,

the second casing having a recess with a dent in which a projection is insertable,

the waterproof member having a protruding seal part which, when fitted into the recess, prevents penetration of water and has a projection engageable with the dent when being inserted in the dent.

2. The waterproof structure according to claim 1, wherein the protruding seal part is a peripheral part of the waterproof member, which is laid out all around space between the first casing and the second casing,

the first casing is provided with a restriction part at that position of the waterproof member which faces the peripheral part to be press fitted in the recess, the restriction part preventing the peripheral part from coming out, and

the waterproof member is provided with a circumferential wall part bent inward from the peripheral part and standing upright toward the first casing, the circumferential wall part being guided by the first casing and the second casing.

3. The waterproof structure according to claim 1, wherein the waterproof member is a film covering between the first casing and the second casing.

4. The waterproof structure according to claim 2, wherein the second casing is provided with a support which supports an end face of the circumferential wall part of the waterproof member.

5. The waterproof structure according to claim 3, wherein a part of the waterproof member is transparent, and a mount part where a light guide plate is mounted is provided at the transparent part.

6. The waterproof structure according to claim 3, wherein a silver sheet or a metal plate is integrally formed on an internal side of the waterproof member.

7. The waterproof structure according to claim 3, wherein the waterproof member partly includes a metal plate.

8. The waterproof structure according to claim 7, wherein the metal plate has a protruding part at a part of a flat surface of the metal plate.

9. The waterproof structure according to claim 1, wherein the waterproof member has a circumferential wall part standing upright toward the first casing from the protruding seal part, and partially has a metal plate provided at a position extending approximately horizontally from the circumferential wall part,

the metal plate has a first hook which is bent toward the second casing at a position inward of an end portion of the metal plate by a predetermined distance, and is bent toward the first casing at a position slightly outward of the inward-bent position, the first hook having an end portion protruding from the circumferential wall part, and

the second casing has a second hook engageable with the first hook.

10. The waterproof structure according to claim 9, wherein the waterproof member has a flat part extending approximately horizontally from the circumferential wall part, and

the metal plate is adhered to a second casing side of the flat part.

11. The waterproof structure according to claim 10, wherein the metal plate is provided with a first opening, and

the first casing is provided with a second opening at a position facing the first opening with the waterproof member in between.

12. The waterproof structure according to claim 9, wherein the metal plate is provided with a first opening in which a seal formed of an elastic material is fitted, and

the first casing is provided with a second opening which exposes the seal.

13. The waterproof structure according to claim 11, wherein the first opening and the second opening are circular or elliptic.