Title:
スピーカ用振動板
Document Type and Number:
Japanese Patent JP4561960
Kind Code:
B2
Abstract:
A diaphragm body (12) is provided with a plurality of slits (14, 14a) extending from the central part thereof toward the outer circumference. The slits (14, 14a) are filled with a low-elasticity filling material composed of a material different from that of the diaphragm body (12). The slits (14, 14a) are extended rectilinearly or curvedly. The filling material (15) has a Young's modulus lower than that of the principal material of the diaphragm body (12) and/or an internal loss larger than of the principal material of the diaphragm body (12). Furthermore, the filling material (15) employs UV ray and/or visible ray curable resin or thermoplastic resin. Alternatively the filler (15) may be a porous material or a foamed material. The diaphragm body (12) produced by filling the slits (14, 14a) with the filling material (15) is employed for constituting a loudspeaker.
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Inventors:
Fumio Saito
Takashi Mikuniya
Takashi Mikuniya
Application Number:
JP2004015079A
Publication Date:
October 13, 2010
Filing Date:
January 23, 2004
Export Citation:
Assignee:
Foster Electric Co., Ltd.
International Classes:
H04R7/14; H04R9/02; H04R7/02; H04R7/12; H04R9/04; H04R9/06
Domestic Patent References:
| JP7312798A | ||||
| JP5050894U | ||||
| JP11234793A |
Attorney, Agent or Firm:
Michio Takayama