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Patent Searching and Data


Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049846
Kind Code:
A1
Abstract:
Provided is a sound production device which, as a sound production device enabling easy and accurate coil alignment and having improved ease of assembly, is provided with: a diaphragm; an armature that is formed from a magnetic material; a magnet that faces the armature; a yoke that supports the magnet; a coil; a transmission body that transmits vibration of the armature to the diaphragm; and a support member that holds the coil, wherein the support member is provided with a positioning part and a biasing part, and the coil is elastically biased toward the positioning part by the biasing part, and positioned and held between the positioning part and the biasing part.

Inventors:
NUMATA,Taishi (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
AOKI, Daigo (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
TSUCHIYA, Akihiro (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
IGUCHI, Shuji (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
Application Number:
JP2018/032696
Publication Date:
March 14, 2019
Filing Date:
September 04, 2018
Export Citation:
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Assignee:
ALPS ALPINE CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
International Classes:
H04R11/02
Domestic Patent References:
WO2017018074A12017-02-02
Foreign References:
JP2006186615A2006-07-13
JP2016076980A2016-05-12
Attorney, Agent or Firm:
OKUBO, Katsuyuki (7th Floor, SEIBUNDO Building 4-3-26, Kudan-kita, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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