BONE CONDUCTION SPEAKER

WIPO Patent Application WO/2018/079340

A1

[Problem] The present invention addresses the problem of providing a bone conduction speaker, with which a high range that cannot be covered by bone vibration can be efficiently made audible by transmitting an air-conducted sound generated by a diaphragm through the eardrum. [Solution] A bone conduction speaker is obtained by loading a yoke assembly 4 in a container 2 of a unit case 1. The container 2 is provided with a first diaphragm 5 disposed on an upper portion thereof and a second diaphragm 6 installed on a lower portion thereof. The yoke assembly 4 is installed on the second diaphragm 6, and a voice coil 10 is installed on the rear surface of the first diaphragm 5. A space in a lid portion on the upper side of the first diaphragm 5 serves as an air-conducted sound generation chamber 11. A part of a lid portion 3 is opened to form a sound discharge port 12. An air-conducted sound generated in the air-conducted sound generation chamber 11 by vibration of the first diaphragm 5 can be discharged through the sound discharge port 12 in a direction substantially orthogonal to a vibration direction of the bone conduction speaker.

JPS58119298	[Title of the device] The ultrasonic transducer using a polymers piezoelectric film
JPS62250798	ACOUSTIC REPRODUCING DEVICE
WO/2005/062397	ACTUATOR

FUKUDA MIKIO (JP)

PCT/JP2017/037536

May 03, 2018

October 17, 2017

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TEMCO JAPAN (JP)

H04R1/00; H04R1/10; H04R7/12; H04R9/02

WO2005069586A1	2005-07-28
WO2015198683A1	2015-12-30

JP2000023438A	2000-01-21
JP2008092460A	2008-04-17
JP2006304262A	2006-11-02

SAITOH Haruo (JP)

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