Title:
DIAPHRAGM UNIT OF A CONDENSER MICROPHONE, A METHOD OF FABRICATING THE SAME, AND A CONDENSER MICROPHONE
Document Type and Number:
WIPO Patent Application WO/1988/006832
Kind Code:
A1
Abstract:
This invention provides a condenser microphone simply constructed without using a separately provided push-up cylinder that has hitherto been used for pressing the vibration diaphragm to give a predetermined tension thereto. In this microphone, furthermore, the tension of the vibration diaphragm is hardly affected by a change in the temperature. A vibration diaphragm (15) subjected to a predetermined tension is held between a first ring (37) and a second ring (39), and then welded together to constitute a diaphragm unit (55). Preferably, a ring-like protuberance (39a) is provided on one ring to bias the vibration diaphragm (15) toward the other ring. The condenser microphone is assembled using the diaphragm unit (55) in such a manner that an insulating plate (23) for holding a back electrode (22) is engaged with said one ring.
Inventors:
YASUDA MAMORU (JP)
TODA HITOSHI (JP)
TODA HITOSHI (JP)
Application Number:
PCT/JP1988/000236
Publication Date:
September 07, 1988
Filing Date:
March 03, 1988
Export Citation:
Assignee:
HOSIDEN ELECTRONICS CO (JP)
International Classes:
H04R19/00; H04R31/00; (IPC1-7): H04R19/04; H04R7/22
Foreign References:
| JPH05110924A | 1993-04-30 | |||
| JP5221053Y | ||||
| JPH05744399A | ||||
| JPS56108699U | 1981-08-22 | |||
| JP5223330Y |
Other References:
YOSETSU GIJUTSU, Vol. 34, No. 9, September (1986) On Morihiro "Electron Beam Yosetsu. Laser Kako no Oyo" p. 47-52
See also references of EP 0305540A4
See also references of EP 0305540A4
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