专利名称：Electro-acoustic transducer发明人：Masana Ugaji,Hideo Suyama,Sadaaki
Sakurai,Shigenori Yamaoka,ToshinagaEndo,Akinobu Kusuhara
申请号：US06/066381申请日：19790814公开号：US04281223A公开日：19810728
摘要：An electro-acoustic transducer, such as a loudspeaker, a microphone, or thelike, comprises a magnetic circuit having at least one air gap, a current conductordisposed in the air gap of the magnetic circuit to form a voice coil which is traversed bymagnetic flux, and a vibratory structure mechanically coupled to the voice coil. Thevibratory structure is comprised of a heat resistant film containing an epoxide- modifiedresin in which a heterocyclic compound containing a polyimide group is the maincomponent. The voice coil is non-adhesively secured to the vibratory structure. Forexample, the voice coil is formed of a conductive substrate onto which the vibratorystructure is coated and from which portions have been etched to form a generally spiral-shaped conductor. In one embodiment, the vibratory structure is a diaphragm; and inanother embodiment, the vibratory structure is a bobbin having the voice coil woundthereon.
申请人：SONY CORPORATION
代理人：Lewis H. Eslinger,Alvin Sinderbrand
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