Title:
CAPACITOR MICROPHONE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2011/024396
Kind Code:
A1
Abstract:
Occurrence of variations in sensitivity characteristics between capacitor microphones having metal cases is prevented even when a large number of upper units including vibrating film subassemblies, spacers, and ring-shaped members are produced in one step. When a large number of upper units (14) are cut out in one step, an upper unit aggregate (114) is processed while the upper units are connected to each other such that grooves (114a) having a predetermined width are formed in the upper surface of each of strip portions (126a) of a ring-shaped member aggregate (126) by cutting off each of beam portions (122a) of a vibrating film subassembly aggregate (122) and each of beam portions (124a) of a spacer aggregate (124) and subsequently such that the strip portions (126a) are cut off at the central portions of the grooves (114a). With this, top end portions of outer circumferential surfaces (22a) of ring-shaped members (26) form cutoff portions (26c), and end surfaces of protrusions (22b, 24b) remaining on outer circumferential surfaces (22a, 24a) of vibrating film subassemblies (22) and spacers (24), respectively, are flush with side surfaces (26c1) of the cutoff portions (26c).
Inventors:
ITO MOTOAKI (JP)
KAMO SHOTARO (JP)
KAMO SHOTARO (JP)
Application Number:
PCT/JP2010/005011
Publication Date:
March 03, 2011
Filing Date:
August 10, 2010
Export Citation:
Assignee:
STAR MFG CO (JP)
ITO MOTOAKI (JP)
KAMO SHOTARO (JP)
ITO MOTOAKI (JP)
KAMO SHOTARO (JP)
International Classes:
H04R31/00; H04R19/04
Foreign References:
| JP2006115008A | 2006-04-27 | |||
| JP2007036386A | 2007-02-08 | |||
| JP2008219435A | 2008-09-18 | |||
| JP2007208588A | 2007-08-16 | |||
| JP2002335598A | 2002-11-22 | |||
| JP2005341390A | 2005-12-08 |
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