Title:
ACOUSTIC TRANSDUCER AND SOUND OUTPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/018074
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve an acoustic characteristic without causing increases in manufacturing cost and size.
An acoustic transducer is provided with: a drive unit comprising a yoke formed of a magnetic material, a magnet attached to the yoke, a coil to which a drive current is supplied, and an armature in which a vibration part that vibrates when the drive current is supplied to the coil is provided; and a diaphragm unit comprising a holding frame having an opening, a film affixed to the holding frame while covering the opening, a diaphragm held inside the holding frame while affixed to the film, and a transmission beam for transmitting the vibration of vibration part to the diaphragm, wherein all of the outer periphery of the diaphragm is spaced apart from all of the inner periphery of the holding frame.
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Inventors:
MATSUDA KOJI (JP)
Application Number:
PCT/JP2016/067390
Publication Date:
February 02, 2017
Filing Date:
June 10, 2016
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H04R11/02
Foreign References:
| JP2012129838A | 2012-07-05 | |||
| JPS58106998A | 1983-06-25 | |||
| JP2006041768A | 2006-02-09 | |||
| JP2001245390A | 2001-09-07 | |||
| JP2012004850A | 2012-01-05 |
Attorney, Agent or Firm:
IWATA, Masanobu et al. (JP)
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