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公开(公告)号：US20170164088A1
公开(公告)日：2017-06-08
申请号：US14907588
申请日：2015-04-09
发明人： MIKIO FUKUDA
CPC分类号： H04R1/1008 , H04R1/1016 , H04R1/24 , H04R1/345 , H04R1/46 , H04R7/04 , H04R9/06 , H04R25/48 , H04R25/606 , H04R2460/13
摘要： Problem: To provide a bone conduction speaker that, while it is a bone conduction speaker, additionally has a structure allowing a respiratory tract sound to be generated, thereby the high frequency characteristics thereof being improved, and thus, that, in the case where it is used by a hearing non-impaired person, communications at a good voice level can be made as well as in the case where it is used by a hearing impaired person, and further, when the hearing non-impaired person uses it to listen to a music, the music can be enjoyed with a high sound quality.Solution: A second diaphragm 3 is fixed to a bottom face of a bone conduction speaker unit 2 incorporated in a housing 1; a peripheral part of the second diaphragm 3 is fixed to an inner surface of the housing 1 over its entire periphery, thereby an upper air chamber 4 being formed on the upper side of the second diaphragm 3, and a lower air chamber being formed on the lower side thereof; and a sound emitting port 6 is formed in a side face or a bottom face of the lower air chamber 5.
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公开(公告)号：US20210127184A1
公开(公告)日：2021-04-29
申请号：US16493881
申请日：2018-12-17
发明人： MIKIO FUKUDA
IPC分类号： H04R1/02
摘要： Provided is a bone conduction speaker unit with which, in order to improve the vibration characteristics, a vibration-suppressing structure is incorporated in a unit main body, whereby sound leakage and vibration from the unit as a single body can be suppressed. The bone conduction speaker unit, including a bone conduction speaker main body incorporated in a casing, uses a flat plate spring for holding the bone conduction speaker main body in the casing, the flat plate spring being disposed such that the direction of vibration of the bone conduction speaker main body being in parallel with the direction of vibration of the flat plate spring.
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