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Title:
INDUCED MAGNET TYPE PICKUP CARTRIDGE
Document Type and Number:
Japanese Patent JPS5829299
Kind Code:
A
Abstract:

PURPOSE: To elevate power generation efficiency, to suppress deterioration of a characteristic due to a variation of stylus pressure, and also to make a magnet and a vibration system light in weight, by placing a pair of magnets, and yokes so as to place an armature of a cantilever between them.

CONSTITUTION: A cantilever 31 is fixed to the center part of an armature 33, and the armature 33 is constituted by forming a magnetic permeable plate crosswise. An axis of the cantilever 31 is made to meet at right angles with the surface where the armature 33 is positioned. They are fitted to a holder 35 through a damper 34 of an elastic body. Before and behind a projecting part 33d of the armature 33, magnets 40, 41 are disposed while keeping the projecting part 33d between them and keeping the same poles oposed. On the circumference of projecting parts 33a∼33c, horizontal and vertical yokes 42, 43 and 44 are provided. Each yoke has each coil as shown in the figure 7, and each end part is opposed and provided by placing the projecting part of the armature between them.


Inventors:
ITOU TSUGIO
Application Number:
JP12754081A
Publication Date:
February 21, 1983
Filing Date:
August 14, 1981
Export Citation:
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Assignee:
NIPPON MUSICAL INSTRUMENTS MFG
International Classes:
H04R11/08; (IPC1-7): H04R11/08
Attorney, Agent or Firm:
Masatake Shiga