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Title:
ELECTRO-MECHANO-ACOUSTIC CONVERTER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3680562
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a high-quality product which prevents damage and performance deterioration by a falling impact, relating to an electro-mechano-acoustic converter used mainly for portable telephones, or the like.
SOLUTION: This electro-mechano-acoustic converter comprises at least one suspension 14 which supports a moving section 19 comprising a magnetic circuit section 17 and a weight section 13 and a frame 9 which supports a diaphragm 8 and this suspension 14 and is disposed with a spacing within the elastic deformation range of the suspension 14 between itself and the outer periphery of the moving section 19. Even if a portable terminal device falls and the impact is applied on the built-in electro-mechano-acoustic converter, the outer periphery of the moving section 19 is received by the frame 9, by which the permanent deformation of the suspension 14 is prevented.


Inventors:
福山 敬則
Application Number:
JP1998000183736
Publication Date:
August 10, 2005
Filing Date:
June 30, 1998
Export Citation:
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Assignee:
松下電器産業株式会社
International Classes:
H04R31/00; B06B1/04; G10K9/22; H04M1/03; H04R11/02; B06B1/02; H04R9/06; (IPC1-7): B06B1/04; H04R31/00
Domestic Patent References:
JP9172763A
Attorney, Agent or Firm:
岩橋 文雄
坂口 智康
内藤 浩樹