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Patent Searching and Data


Title:
MOVING COIL TYPE PICKUP CARTRIDGE
Document Type and Number:
Japanese Patent JPS5448202
Kind Code:
A
Abstract:

PURPOSE: To have high output characteristics and improve frequency characteristics over a wide frequency range by disposing a moving coil secured to the root part of a cantilever within the gap magnetic flux formation in which magnetic pieces of opposite polarities in outer circumference part and inner circumference part are disposed.

CONSTITUTION: A moving coil 1 secured at a right angle to axis to the root part of a cantilever 3 having a stylus 2 at the end and is formed with a coil pattern 11 for left channel on one surface of its insulating and non-magnetic thin substrate 10 of such as glass, etc. and a coil pattern 12 for right channel on the other surface. Said coil patterns 11, 12 for left and right channels comprise disposing fan type coils of respectively clockwise and counterclockwise turning within the four blocks bounding at the axes inclining 45° in the clockwise and counterclockwise directions with respect to the axis perpendicular to the modulated grooves of a record. A magnetic field forming means 4 comprises opposing magnets 17, 18 of polarities different in outer circumferential part and inner circumferential part with the moving coil 1 in-between to form an annular magnetic field and linking the magnetic flux of radiation magnetic fields of stronger repulsive force with the arc portions in the fan coils. Thereby, the occurrence of magnetic distortions may be eliminated


Inventors:
KISHI OSANORI
Application Number:
JP11394777A
Publication Date:
April 16, 1979
Filing Date:
September 24, 1977
Export Citation:
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Assignee:
VICTOR COMPANY OF JAPAN
International Classes:
H04R9/12; H04R9/16; (IPC1-7): H04R9/16