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Patent Searching and Data


Title:
ELECTROMAGNETIC OUTPUT UNIT
Document Type and Number:
Japanese Patent JPS5671907
Kind Code:
A
Abstract:

PURPOSE: To attempt an increase in the driving force of a reciprocating drive type electromagnetic output unit and the improvement of the responsiveness by arranging a magnetic substance having an exciting coil between both projections magnetized the same pole by a permanent magnet.

CONSTITUTION: Circumferential projected walls 5a, 5b provided at the opposite ends of a cylindrical case 1 are magnetized the same pole by a permanent magnet 6. An output shaft 9 of a nonmagnetic substance and a plunger 8 having an exciting coil 7 are also arranged between both circumferential projected walls to freely slide. Therefore, when the plunger 8 is excited, attractive force and repulsive force act to the opposite ends respectively in the same direction. So the plunger 8 is driven by the resultant force and the driving force becomes strong and no difference in the driving force exists at the time of reciprocation as well. Furthermore, the electromagnetic force caused by the magnetic field of the permanent magnet 6 and the current of the coil 7 acts with the resultant force in the same direction. Therefore, stronger driving force is available and the responsiveness will also be increased.


Inventors:
Takase, Yoshio
Muraoka, Takeshi
Application Number:
JP1979000148534
Publication Date:
June 15, 1981
Filing Date:
November 15, 1979
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H01F7/16; H01H51/22; H01F7/122; (IPC1-7): H01H51/22