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Patent Searching and Data


Title:
ELECTROACOUSTIC TRANSDUCER AND HEARING AID USING THE SAME
Document Type and Number:
Japanese Patent JP2007074499
Kind Code:
A
Abstract:

To provide an electroacoustic transducer in which reduction of output sound pressure and rise of distortion ratio are hard to occur even when it is influenced by an excess external impact by improving shock resistance.

In the electroacoustic transducer in the casing of which an armature 2, a yoke 3, a coil 4 and a pair of magnets 5, 6, etc. are arranged, the armature 2 has an armature movable part 14, a movable foil member 8 is provided at least one of spaces 30a, 30b formed on inner peripheral surfaces 4d between the armature movable part 14 and the coil 4 in the movable direction of the armature movable part 14 and one edge 8a of edges of the foil member 8 is adhered to outer peripheral surfaces 4e except the inner peripheral surface 4d of the coil 4 by adhesive agent 32.


Inventors:
TAMURA KENJI
FUNAHASHI FUMITAKA
MIKAMI ATSUSHI
Application Number:
JP2005000260560
Publication Date:
March 22, 2007
Filing Date:
September 08, 2005
Export Citation:
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Assignee:
RION CO
International Classes:
H04R11/02; H04R25/00
Attorney, Agent or Firm:
小山 有
稲元 富保