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Title:
ACTUATOR OF ROTARY ARM TYPE
Document Type and Number:
Japanese Patent JPS5567974
Kind Code:
A
Abstract:
PURPOSE:To prevent harmful vibrations of bobbin and arm by providing a coil assembly with a reinforcing member and a magnet assembly with an escape groove. CONSTITUTION:To reinforce bobbin 261 of coil assembly 26 of a rotary arm type actuator, a couple of reinforcing members 263 and 264 are provided and in magnetic-body pieces 274 and 275 of magnet assembly 27, escape grooves 278 and 279 preventing contact with reinforcing members 263 and 264 are formed. Consequently, the strength of coil assembly 26 increases to prevent harmful vibrations of an arm fitted to one terminal of coil assembly and bobbin 261. Consequently, the magnetic head can rapidly be positioned on a desired track with precision and greater rotation force can be obtained by the same current in comparison with an increase in the strength by increasing the thickness of bobbin 261.

Inventors:
FUJIOKA MASAHIKO
OKUMURA JIYUICHI
TAKAHASHI KEIGO
SHIMANUKI MACHIO
Application Number:
JP13895578A
Publication Date:
May 22, 1980
Filing Date:
November 13, 1978
Export Citation:
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Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
G11B21/02; G11B21/08; (IPC1-7): G11B21/08



 
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