Title:
SPEAKER
Document Type and Number:
Japanese Patent JP3746587
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive speaker that is easily manufactured by effectively interrupting thermal conduction between eyelets and a diaphragm.
SOLUTION: A contact 1 is formed to a diaphragm 2, a wire to conduct a signal current is connected to a voice coil via the contact 1, and a thermal foaming polymer resin layer 3 is formed to the entire face of the diaphragm 2 or around the contact 1 of the diaphragm 2. Through the configuration above, when the surrounding of the contact 1 reaches a prescribed temperature or over, the thermal foaming polymer resin layer 3 is foamed and a foamed carbide layer is formed around the contact 1. The foamed carbide layer insulates the heat from the contact layer 1 effectively.
Inventors:
Takashi Ogura
Murata Kosaku
Murata Kosaku
Application Number:
JP10066797A
Publication Date:
February 15, 2006
Filing Date:
April 17, 1997
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
C08J9/06; H04R7/02; B32B5/20; C08J9/14; H04R1/06; H04R9/00; (IPC1-7): H04R7/02; B32B5/20; C08J9/06; C08J9/14; H04R1/06; H04R9/00
Domestic Patent References:
| JP3195297A | ||||
| JP1147599U | ||||
| JP57158288U | ||||
| JP57141496U | ||||
| JP6000493A | ||||
| JP6150802A | ||||
| JP2286259A | ||||
| JP7262904A | ||||
| JP63141233A | ||||
| JP1233999A | ||||
| JP6333493A | ||||
| JP10126883A |
Attorney, Agent or Firm:
Hiroyuki Ikeuchi
Kimihiro Sato
Kimihiro Sato