JPH0182599U

JPH0182599U -

Info

Publication number: JPH0182599U
Application number: JP1987178148U
Authority: JP
Priority date: 1987-11-20
Filing date: 1987-11-20
Publication date: 1989-06-01

Description

[Brief explanation of the drawing]

第１図は本考案第１実施例の断面図、第２図は
同第２実施例の断面図、第３図は同第３実施例の
断面図、第４図は従来の可動磁石型電気音響変換
器の断面図である。１は振動体、２は駆動軸、３は磁石、４はコイ
ルＡ、５はコイルＢ、６はハウジング、７は支持
部材、８はヨーク、９はカバーである。 Fig. 1 is a sectional view of the first embodiment of the present invention, Fig. 2 is a sectional view of the second embodiment of the invention, Fig. 3 is a sectional view of the third embodiment of the invention, and Fig. 4 is a sectional view of the conventional movable magnet type electric FIG. 2 is a cross-sectional view of an acoustic transducer. 1 is a vibrating body, 2 is a drive shaft, 3 is a magnet, 4 is a coil A, 5 is a coil B, 6 is a housing, 7 is a support member, 8 is a yoke, and 9 is a cover.

Claims

[Claims for Utility Model Registration] 1. A drive shaft 2 coupled to the vibrating body 1, and a magnet fixed to the drive shaft 2, magnetized in the axial direction, and having an axial length approximately equivalent to twice the amplitude. 3, a cylindrical coil A4 that encloses the magnet 3 with a gap in between and to which an audio current is applied; and a cylindrical coil A4 that also includes the magnet 3 with a gap in between and to which an audio current is applied in the opposite direction to the coil A4. A cylindrical coil B5, a housing 6 that holds the coils A4 and B5 in series, and a drive shaft 2 to which the magnet 3 is fixed.
An electric sound alarm exchanger comprising a support member 7 that vibrably supports the coil B5 and the coil A4 inside the coil B5 and the coil A4. 2. The electroacoustic transducer according to claim 1, wherein a yoke 8 is coupled to both end surfaces of the magnet 3. 3. The electroacoustic transducer according to claim 1, which is a registered utility model, and includes a cover 9 made of a magnetic material on the outside of the series of coils A4 and B5. 4. The electroacoustic transducer according to claim 1, wherein the magnet is a rare earth magnet. 5. The electroacoustic transducer according to claim 1, wherein the support member is a bearing 7a. 6. The electroacoustic transducer according to claim 1, wherein the support member is a damper 7b. 7. The electroacoustic transducer according to claim 1, wherein a plurality of sets of the magnet 3 and the yoke 8 are attached to the same drive shaft 2. 8. The electroacoustic transducer according to claim 1 of the registered utility model claim, characterized in that a plurality of sets of drive mechanisms each consisting of the magnet 3, the coil A4, and the coil B5 are attached to the same drive shaft 2. vessel.