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JPS5576595

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DESCRIPTION JPS5576595
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged sectional view of an essential part
showing an embodiment of the present invention. 1 ...... stylus tip, 2 ...... cantilever, 3 ......
permanent magnets, 4 ...... damper rubber, 5 ······ sleeve, 6- ·········································································
Pole piece
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an
electromagnetic pickup cartridge. In order to accurately convert 1 ° 1 'y j 7' j "-J y ', Iti, FAH *
mt to its electrical signal, its vibrating part 楚% 1' 142 min contacts other parts in the air It is
held without. When the oscillator vibrates in air of low magnetic permeability, it has a process of
electrically detecting the mechanical vibration of the oscillator comprising a permanent magnet
by fluctuating the magnetic flux. The magnetic resistance of the magnetic path is increased, and
the conversion efficiency for detecting the fluctuation of the magnetic flux is limited. The present
invention eliminates the above-mentioned deficiencies and provides an electromagnetic type
pink-up cartridge having a high output voltage and higher conversion efficiency. Hereinafter, the
present invention will be described based on the illustrated embodiments. In the drawing,
reference numeral 1 denotes a stylus tip that moves in accordance with the sound groove of the
record, and is fixed to the tip of the cantilever 2. A cylindrical permanent magnet 3 is fitted and
fixed to the other end of the cantilever 2 and is permanently magnetized in the longitudinal
direction of the cantilever 2, and it grooves the vibrator. 4 is a ring-shaped damper rubber mixed
with particles of high magnetic permeability material, the inner periphery of which is fitted with
the outer periphery of the permanent magnet 3) and the outer periphery of which is fitted with
the inner periphery of the snorve 5. 6 is an elastic support wire having one end fixed to the
cantilever 2 and the other end fixed to the support + 11 '+ material 7. The support member 7 is
fixed to the sleeve 5. A pole piece 8 detects a change in magnetic flux of the permanent magnet
3. With the above configuration, the damper rubber 4 in which particles of the high magnetic
permeability material are mixed is disposed in the path of the magnetic flux generated by the
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permanent magnet 3, so that the magnetic flux generated by the permanent magnet 3 is
efficiently changed. It is possible to realize large-scale electromagnetic pinotank cartridge
resources.
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