Title:
A waterproof sound-transmittable film, a case for a waterproofing The sound-permeable member provided with it, electronic equipment, and electronic equipment, and waterproofing The sound-permeable structure
Document Type and Number:
Japanese Patent JP5942004
Kind Code:
B2
Abstract:
A waterproof sound-transmitting membrane of the present disclosure includes: a non-porous resin film having formed therein a plurality of through holes extending through a thickness of the non-porous resin film; and a liquid-repellent layer formed on a principal surface of the resin film and having openings at positions corresponding to positions of the plurality of through holes. The through holes have a diameter of 4.0 µm or more and 12.0 µm or less, and the waterproof sound-transmitting membrane has a through-thickness air permeability of 2.0 cm 3 /(cm 2 ¢ second) or more and 50 cm 3 /(cm 2 ¢ second) or less in terms of Frazier number as measured according to JIS L 1096. With this waterproof sound-transmitting membrane placed over an opening of a housing of an electronic device or the like, entry of water into the housing from outside can be prevented, in addition to which the characteristics of sound transmitted through the membrane can be kept even when the membrane has a reduced effective area.
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Inventors:
Mori Masaaki
Ryo Furuyama
Ryo Furuyama
Application Number:
JP2015043239A
Publication Date:
June 29, 2016
Filing Date:
March 05, 2015
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
H04R1/00; H04M1/02
Domestic Patent References:
| JP2012195928A | ||||
| JP2012025160A | ||||
| JP3041182A | ||||
| JP2002502561A |
Foreign References:
| WO2013004347A1 |
Attorney, Agent or Firm:
Koichi Kamata