JPS57125092

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DESCRIPTION JPS57125092
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the structure of a conventional
pickup cartridge, and FIG. 2 is a view showing the structure of a pickup cartridge of the present
invention. 3.4 is a generating coil, 3a, 3b, 4a, 4b are lead portions of the generating coil, 5a, 5b,
6a, 6b are output terminal pins, 7a, 7b, 8a, 8b are single core coated wires, 7, 8 are It is a parallel
2 core wire.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a No type pickup cartridge. As shown in FIG. 1, the conventional No type pickup cartridge
accommodates the pickup main body (2) in the case (1), and the power generating coil (3 turns)
of this pickup main body (for 2) 1095 · 7 · / ψ p2 , (4) lead parts (8a), (3b), (4a), (4b) fixed to the
case (1) in the output terminal bins (5a), (5b), (6a), (6b) respectively Connected structure. Have a
construction. In this structure, the lead portions (3a), (3b), (4a) and (4b) of the generating coils
(3) and (4) are located in the leakage flux leaking from the magnetic circuit of the pickup main
body (2) Since these lead portions vibrate in different modes due to the vibration of the pickup
cartridge, different electromotive forces are generated in the respective lead portions (3a), (8b),
(4a) and (4b) to increase distortion. It was the cause of the deterioration of the S / N ratio. The
present invention is an improvement of such a conventional defect, and will be described below
with reference to the drawings. In FIG. 2, the same parts as those of the conventional example of
FIG. 1 will be described with the same reference numerals. The lead parts (8a), (8b), (4a), (4a) of
the generating coils (3) and (4) will be described. 4b) and single cored coated wire (7a), ())
10511; 3? b), the parallel two cores (7), (8) consisting of (8a), (8b) are connected by the magnetic
circuit (yoke) portion of the pickup main body (2), and the parallel two cores (7), (8) ) Is
connected to the output terminal pins (5a), (5b), (6a) and (6b), respectively. As described above,
according to the present invention, two parallel cores (7), (8) are located in the leakage flux, and
these two parallel cores (7L (8) vibrate, but each parallel two cores (7 ), (8) are the single core
sympathetic lines (7a), (? b), (8a), (8b) integrally vibrates in the same direction with the same
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displacement, so that the induction induced by the single-core pick-up lines (7a), (7b), (8a), (sb)
Power is reversed in the opposite direction, and has the advantage of being able to eliminate
adverse effects such as increased distortion and S / N ratio deterioration due to different
electromotive forces as in the prior art.
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