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JPS538902

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DESCRIPTION JPS538902
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a needle
vibrating mechanism according to the present invention. FIG. 2 is the same longitudinal sectional
view. Fig. 3 and Fig. 4 are examples of the same site. 5, 6 and 7 are reference diagrams showing
the prior art. In the figure, 1: needle tip, 2: canterever, 3: macnet, 4: damper rubber, 5: pivot, 6:
screw, 7: back needle case, 8: ring for fixing cantilever, 9: cone Hole, 10: 5 pot tip, 11: conical
hole bottom, 12: pivot extraction hole, 13: needle holder. Correction Akira 51.10-19
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a needle vibration
mechanism of a pickup cartridge, and is intended to improve the faithfulness of reproduced
sound and to prevent the distortion of compliance change, mixing change, metering and the like.
is there. A conventional vibration transmission mechanism pulls a thin wire from the center of
the magnet and applies dampers to the damper rubber to fix the wire to the needle case, and a
needle tip tip on the front of the magnet There is a book in which the damper rubber is
positioned and pivoted from the opposite side of the needle tip, or, most generally, a book is
configured to wrap the damper 5 with rubber around the magnet. The disadvantage of these is
that with thin wire use the oscillating fulcrum does not concentrate at one point in the thin wire.
In the case of using a pivot, since the force acting in the record rotation direction is zero with
only the damper rubber, the entire vibration system tends to be pulled in one direction. In
addition, since the vibration system is supported only by the damper rubber of the configuration
in which the magnet is wrapped with the damper rubber, the vibration fulcrum is unknown. &
Quot; & 0 · & quot; -1 ° ljl & 71 & quot; 1 & quot; fillbJl # A & quot; 91. There was a drawback
of each being finished and scolded. 'L The present invention is proposed to improve the function
of these defects 1 kwF never Vik-alaff cartridge. Below, in the drawing! More specifically, the
present invention is a vibration transmission system 0'gnet 'needle in which a magnet 3, a
damper rubber number, and a back portion 21 are sequentially disposed continuously to a can
31 to a lever 2 having a needle V in the tip direction. In the front end 7 ′ * 1 face, the
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center of the eyebrows is 5 , and in the case of the cantilever 2, a tapered conical hole 9 is
drilled at any position on the y longitudinal central axis, 6. Insert the conical hole 9 of the magnet
3 from the conical hole 9 of the magnet 3 and the conical hole bottom 11 from the direction
parallel to the needle center of the cantilever 2 and parallel to the longitudinal central axis, The
extension of the Vibot 6 is drawn out contactlessly 1 out of the cantilever through the extraction
hole 12 attached to the cantilever 2, == − doll case on the −− side. Alternatively, the present
invention is characterized in that it is extended to a needle case at another place and fixed there.
With such a configuration, when the needle tip 1 is driven by a signal from the recording sound
groove because of the operating principle of the vibration transmission unit, the signal becomes
needle tip ◇ tube 1 through cantilever 2 and magnet 3) Transmitted to
At that time, the bottom portion 11 of the magnet 30 conical hole 9 is completely supported by
the pivot tip 1o, so that one point portion thereof becomes one point support and a perfect fk
imaging fulcrum. The needle movement system can perform a complete rotational movement
around this oscillation fulcrum. The vibration fulcrum is clearer than this K, and a high fidelity
reproduced sound can be obtained from the low band to the high band. On the other hand, at the
time of playing a record, the entire needle vibration system is influenced by a force which is
pulled in the record rotation direction, that is, in the direction of arrow A in FIG. As a result, the
needle vibration system may cause an increase in intermodulation distortion and other various
distortions, and may inhibit the faithfully reproduced sound. In this respect, in the present
invention, the pivots 5, r- and-which are attached in the opposite direction to the pulling force in
the direction of arrow X exert a remarkable effect of eliminating the above-mentioned defects.
Since the pivot 5 is configured to contact the magnet 3 so as to press the back damper rubber
No. according to the present invention, the pressure can be adjusted by adjusting the pressing
force 9 during the configuration. There is an advantage that the compliance of can be easily
obtained. The extension part of the pivot 5 may be fixed at the back needle case as shown in FIG.
2, or may be extended to other needle cases as shown in FIG. 3 and FIG. . Particularly in the case
of FIG. 4, it may be preferable to implement it in the conventional moving magnet type cartridge.
It is needless to say that any method can be taken such as fixing with a screw 6 but using an
adhesive side. As described above, according to the present invention, it is possible to provide a
needle vibration mechanism of a pickup cartridge which can improve the fidelity of reproduced
sound and obtain compliance and can prevent distortion of intermodulation distortion. It became.
ン141.。、。 FIG. 1 is an overall perspective view of a needle vibrating mechanism
according to the present invention. FIG. 2 is the same longitudinal sectional view. Fig. 3 and Fig.
4 are other embodiments. 5, 6 and 1 are reference drawings showing the prior art. In the figure,
1 = needle tip chip 2: cantilever 3: magnet 4 = damper rubber 5: pivot 6: screw 〒 F-dollar case 8:
non-uniform, fixed ring 9: conical hole lo: pivot tip 11: Conical hole bottom 12: Pivot extraction
hole (A) 13: Needle holder type utility model climbing-out person Mitachi Acoustics
Manufacturing Co., Ltd. 2
j j さ V (Jl /, '/' 4" ' 7
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<5, 7 <· 7 box · ′ //, '::, 乙 7; · Pa 0 brother, / □, z '· · · · · · · · · · ·: (1 · · · · · · · · · · · · · · · · · · "", "" \ "-",
/' · · 2 gu: ',,,,,, 7 *', ',,,,,,. \ \ Et al "· 0 Figure 1" 111 111 、 、 111, 111:] 111: 111 ,, 1. Pa · a · · · ·
1, 1] · · · · · · · · · Figure 7, 8902 ¥ 8. '% Mi · 実 用 utility model registration applicant procedure
amendment (method) Showa 51 Gi 10th Oct Patent attorney General Katayama Ishibe 1 display
case Showa s utility model registration application number 9 0092 No. 2 name of the device
pick-up cartridge The relationship between the needle vibration mechanism 3 correction case
and the incident case Utility model registration Applicant address Numazu City Shizuoka
Prefecture Ooka Kise 329 4 Mitaka Provincial Police Co., Ltd. '8 M representative 圭 V 1 ♀ Ni
Am 4 correction instruction Date September 11, 1977
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