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1. (WO2018040398) MOVING-COIL LOUDSPEAKER

Pub. No.:    WO/2018/040398    International Application No.:    PCT/CN2016/111132
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Dec 21 00:59:59 CET 2016
IPC: H04R 9/06
H04R 9/02
Applicants: GOERTEK. INC
歌尔股份有限公司
Inventors: CAO, Huixian
曹惠娴
JIANG, Shu
姜舒
YANG, Xinfeng
杨鑫峰
Title: MOVING-COIL LOUDSPEAKER
Abstract:
Disclosed is a moving-coil loudspeaker, comprising a vibration system and a magnetic circuit system located below the vibration system. The vibration system comprises a vibrating diaphragm, a spider, and a voice coil that are combined from top to bottom. The vibrating diaphragm comprises a vibrating diaphragm body with a surround, and a vibrating diaphragm reinforcing portion incorporated in the central position below the vibrating diaphragm body. The vibrating diaphragm reinforcing portion comprises a first layer of electrically conductive material, the spider comprises a second layer of electrically conductive material, and the vibrating diaphragm reinforcing portion is bonded to the spider by an insulating adhesive. The magnetic circuit system comprises a central spring washer, a central magnet, and a magnetically conductive yoke combined together from top to bottom. The first layer of electrically conductive material and the second layer of electrically conductive material serve as a movable plate, and the central spring washer, the central magnet and the magnetically conductive yoke serve as a fixed plate, thus forming a capacitor structure for detecting the vibration displacement of the moving-coil loudspeaker. With the capacitor structure provided by the present invention, the vibration displacement of the moving-coil loudspeaker can be monitored. (FIG. 2)