Title:
BONE CONDUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/217399
Kind Code:
A1
Abstract:
A vibrator (4) has a planar shape, comprises a base material layer and a piezoelectric layer stacked on the base material layer, and vibrates by being warped by expansion and compression of the piezoelectric layer. A housing (2) includes an inner space (2C) housing the vibrator (4) and a fixing portion (2D) fixing the outer edge of the vibrator (4), and is able to externally transmit vibrations conveyed via the fixing portion (2D) from the vibrator (4). A signal input portion (3) inputs and applies a voice voltage signal input from a smartphone to the piezoelectric layer. The vibrator (4), with respect to a direction orthogonal to the direction from the fixing portion (2D) to the center of the vibrator (4) on a principal surface (4A) thereof, has a total width W1 greater than a total width of the fixing portion (2D).
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Inventors:
OGATA KENJI (JP)
KUROGI SHOGO (JP)
WATANABE YOSHIYUKI (JP)
KUROGI SHOGO (JP)
WATANABE YOSHIYUKI (JP)
Application Number:
PCT/JP2017/021779
Publication Date:
December 21, 2017
Filing Date:
June 13, 2017
Export Citation:
Assignee:
DAI-ICHI SEIKO CO LTD (JP)
International Classes:
H04R1/00; H04R17/00
Domestic Patent References:
| WO2013039033A1 | 2013-03-21 |
Foreign References:
| JP2007036530A | 2007-02-08 | |||
| JP2003274470A | 2003-09-26 | |||
| JP2005175985A | 2005-06-30 | |||
| JP2006238072A | 2006-09-07 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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