Waterproof ventilation structure and waterproof ventilation member

Patent metadata

Field	Value
Publication number	US-2016228826-A1
Application number	US-201415022423-A
Country	US
Kind code	A1
Filing date	Oct 10, 2014
Priority date	Oct 30, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

Provided is a waterproof ventilation structure including: a housing ( 20 ) including an inner space ( 22 ) and an opening portion ( 21 ); a waterproof gas-permeable membrane ( 11 ) placed to cover the opening portion ( 21 ); an electroacoustic transducing part ( 40 ) placed in the inner space ( 22 ); a first double-faced adhesive tape ( 31 ) directly joining an inner surface of the housing ( 20 ) and an edge portion of one surface of the waterproof gas-permeable membrane ( 11 ) together; and a second double-faced adhesive tape ( 32 ) directly joining an edge portion of the other surface of the waterproof gas-permeable membrane ( 11 ) and the part ( 40 ) together. The waterproof gas-permeable membrane ( 11 ) has a water entry pressure of 50 kPa or more, and the first double-faced adhesive tape ( 31 ) includes a base including a foam material. The total thickness of the waterproof gas-permeable membrane ( 11 ) and the first and second double-faced adhesive tapes ( 31 ) and ( 32 ), as measured in an uncompressed state, is preferably larger than a distance L between the inner surface of the housing ( 20 ) and the part ( 40 ) so that the foam material placed in the waterproof ventilation structure is compressed in a thickness direction.

First claim

1 . A waterproof ventilation structure comprising:
a housing comprising an inner space and an opening portion allowing the inner space to communicate with an outer space; a waterproof gas-permeable membrane placed to cover the opening portion; and an electroacoustic transducing part placed in the inner space, wherein the waterproof ventilation structure further comprises: a first double-faced adhesive tape directly joining an inner surface of the housing and an edge portion of one surface of the waterproof gas-permeable membrane together; and a second double-faced adhesive tape directly joining an edge portion of the other surface of the waterproof gas-permeable membrane and the electroacoustic transducing part together, the waterproof gas-permeable membrane has a water entry pressure of 50 kPa or more as measured by high hydraulic pressure method specified in JIS L 1092, and the first double-faced adhesive tape comprises a base comprising a foam material.

2 . The waterproof ventilation structure according to claim 1 , wherein a total thickness T of the waterproof gas-permeable membrane, the first double-faced adhesive tape, and the second double-faced adhesive tape, as measured in an uncompressed state prior to placement in the waterproof ventilation structure, is larger than a distance L between the inner surface of the housing and the electroacoustic transducing part fixed in the inner space of the housing, and
the foam material placed in the waterproof ventilation structure is compressed in a thickness direction.

3 . The waterproof ventilation structure according to claim 1 , wherein the second double-faced adhesive tape comprises a base comprising a non-foam material.

4 . The waterproof ventilation structure according to claim 1 , wherein the waterproof gas-permeable membrane comprises a stretched porous polytetrafluoroethylene membrane.

5 . A waterproof ventilation member comprising:
a waterproof gas-permeable membrane; a first double-faced adhesive tape joined to an edge portion of one surface of the waterproof gas-permeable membrane; and a second double-faced adhesive tape joined to an edge portion of the other surface of the waterproof gas-permeable membrane, wherein the waterproof gas-permeable membrane has a water entry pressure of 50 kPa or more as measured by high hydraulic pressure method specified in JIS L 1092 , and the first double-faced adhesive tape comprises a base comprising a foam material.

Assignees

• Nitto Denko Corp

Inventors

• Furuuchi Kouji

Classifications

• H04R1/086

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• B01D53/268

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• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H05K5/06

  Hermetically-sealed casings {(specially adapted for small components H05K5/0095)} · CPC title

• H04R1/023

  Screens for loudspeakers · CPC title