Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1997-05-14
1998-12-22
Heitbrink, Jill L.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156293, 181199, 312213, G10K 1100, H04N 564, H04R 102
Patent
active
058513345
ABSTRACT:
A casing for an audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter .phi.d mm of the tapered fine holes to be practically the smallest, the relationship between the diameter .phi.d mm and the thickness T mm of the casing must be expressed by the following formula: (1/6).times.T mm.ltoreq..phi.d mm.ltoreq.0.5 mm. When the fine holes are formed to be straight, the relationship between the diameter .phi.ds mm and the thickness tmm of the casing must be expressed by the following formula: (1/5).times.t mm.ltoreq..phi.ds mm.ltoreq.0.5 mm.
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Shikata Naohiro
Shimizu Kaoru
Shiota Tomio
Heitbrink Jill L.
Matsushita Electric - Industrial Co., Ltd.
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