Small electricity-sound converter with three-mode replaying property

Application Number: 00108038
Application Date: 2000.06.09
Publication Number: 1285705
Publication Date: 2001.02.28
Priority Information: 1999/8/23 KR 34975/1999
International: H04R9/06
Applicant(s) Name: Microtech Co., Ltd.
Inventor(s) Name: Ryo Gan-Wa;Kim Gyong-Ho
Patent Agency Code: 11219
Patent Agent: fang ting
Abstract An electro-acoustic micro-transducer having a high power, high efficiency acoustic transducing feature and a three-mode broad band frequency reproduction feature on a micro-scale basis is provided. The electro-acoustic micro-transducer includes a yoke formed of an internal groove and a vertical incision portion for removing a vertical wall at one side surface, a permanent magnet installed in the groove of the yoke, a plate for forming a magnetic gap, a coil wound on the bobbin, a frame which surrounds the yoke, in which a throughhole is formed in the groove corresponding to the incision portion of the yoke, and a vibration diaphragm. Therefor, spaces in the incision portion of the yoke and the frame are formed so that a connection portion between the coil and lead wire can be prevented from contacting the yoke during vertical vibration, to thereby extend an up-and-down vibration width of the bobbin.