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JPS53128303

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DESCRIPTION JPS53128303
Statement 1. The present invention relates to the improvement 6 of a moving magnet type
(hereinafter referred to as M-M type) cartridge. The conventional M-Mg cartridge is generally
used with the end page of the cantilever with a styla step attached to the end and a small magnet
attached to the other end. The force i was generally used as the medium, and the vibration and
magnet of the styla step are the medium. The vibrations did not perfectly match, and the
cartridge manufacture has struggled for regeneration with high fidelity. JP-A-51-21802 discloses
an MM type cartridge which is not largely influenced by the characteristics of the cantilever in
order to eliminate the cause. This cartridge is provided with a magnet No. 0 having a cross
section of an isosceles right triangle on the magnet stand at the upper position of the needle tip
(company) in the axial direction of the C two-needle support bar as shown in FIG. The magnet
stand is provided on the needle support bar (2). In addition, the output detection coil α 71 of
each of the left and right channels is a cartridge of M-MW in which magnetic core astw wound
with Is is arranged substantially perpendicular oiC at a constant gap of 45 degrees in the magnet.
Since the M-M type cartridge is not greatly affected by the cantilever, the vibration of the needle
tip (company) is more effectively made of the magnet (two attempts to transmit). However, there
is a drawback that increasing the quantity of the magnet (base) and the magnet base (rightmost)
having a right-angled triangular cross-section in this way (since the acoustic characteristics are
adversely affected). Also, in this cartridge, adhesive fixing is not performed between the styler
step 4 and the needle support bar or needle support bar @ and the foundation stone base (or),
and also between the magnet base (2) and the magnet a-. It must not be. Since the adhesive (d) is
a synthetic resin, it has a buffer action, and because the adhesive 011 has three layers of
cushioning zones, it is necessary to transmit the vibration of the needle tip (company) in
complete agreement with the six stones. It is impossible. An object of the present invention is to
eliminate the above-mentioned drawbacks and to transmit the vibration of the needle tip to the
magnet completely, thereby providing an efficient MM type cartridge. Having described the
invention with respect to the embodiment shown in FIGS. 3 to $ U, the following will be given. A
magnet style tip (1) composed of a magnet (1a) is fitted and fixed to a needle supporting rod G of
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a metal part of the junction styler step. From the upper end of this magnet styler step (1), as
shown in FIG. 1 with a constant interval of 9 (: detection in a substantially vertical direction; each
end face of the pole piece (4) wound with t As opposed to (: get up.
FIG. 2 is a front view of the cartridge of the present invention. A magnetic stylus tip (1) is fitted to
the needle support rod (2), and a ball heath (4) in which a detection coil (3) is wound in the
direction of 45 degrees from the vertical axis close to the magnet styler step (1) ) Is installed. The
structure of the magnet styler step (1) is as shown in FIG. 3 to FIG. The structure shown in FIG. 3
is the same as that of a conventional bonding type diamond needle, and as shown in the crosssectional view of IJ6, the cylindrical portion and a portion of the conical portion consist of
Magnets (la). 1b) is bonded and fixed with a brazing material (IC). FIG. 4 shows the cylinder of
the embodiment of FIG. 3 converted into a prism. The magnet styler step (5) in FIG. 5 is obtained
by joining the tip (two conical needle tip (51)) of a pipe-shaped magnet (5a). FIG. 8 is a
longitudinal sectional view of FIG. (5C) is a base portion of the conical needle tip. FIG. 7 shows a
magnet stylus having a hole at the center of a cylindrical or prismatic magnet (1a) and a
protrusion (1d) at the center of the base of a substantially conical needle tip, fitted in the hole of
the magnet It is. Fig. 9 shows that the upper end of the magnet styler step (1) is 45 degrees to
the central axis (= grind and two inclined planes +61 + 61 are provided, and this is placed close
to the two thousand planes to make the pole piece It is a magnet stylus which is provided on the
end face. In FIG. 10, two projections (7) and (7) are provided in the direction of 45 贋 from the
upper end of the magnet styler step (1) to the central axis, and these projections are provided so
as to provide the end face of the pole piece It is a magnet stylus. FIG. 11 shows that the upper
end portion of the magnet styler step (1) is formed in a round shape. Since the vibration of the
needle tip is the vibration of the shank as it is a magnet stylus as described above, the movement
of the needle tip can be completely transmitted to the magnet because the magnet constituting
the shank is a magnet. EndPage: 2 Therefore, it is possible to construct the cartridge without
separately mounting the magnet base α = and the magnet (good) as in the conventional case, so
that the vibration of the needle tip can be completely transmitted to the magnet without
increasing the effective tip weight The cartridge is made. Also, since there is no adhesive between
the needle tip and the magnet and the brazing material 6: joined by n, there is no damping effect,
so it is possible to faithfully transmit the vibration of the needle tip to the magnet, etc. There is.
Also, since the power generation mechanism can be attached to the place where the amplitude is
the largest, there is an effect that an efficient MM cartridge can be produced.
4. Brief description of the drawings Fig. 1 shows one embodiment of the cartridge of the present
invention @: a face, Fig. 2 is a front view of the cartridge, and Figs. 3 to 5 show a magnet styler
step of the present invention. 6 to 8 are longitudinal sectional views of the magnet stylus tip, FIG.
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9 is a perspective view of an embodiment of the magnet styler step, and FIG. 10 is an
implementation side view of the magnet styler step, FIG. The drawing is a perspective view of the
embodiment of the magnet stylus tip in Japanese Patent Application Laid-Open No. 53-128303,
FIG. Ν is a front view of the conventional MM cartridge, and FIG. 13 is a plan view of the
conventional MM cartridge. . (1) ... Magnet Styler step, (1a) ... Magnet, (1 b) ... Needle point
portion, (lc) ... Wax material, (1 d) ... Protrusiveness, (5) · · Pipe-like magnet styler step, (5a) · · ·
pipe-like magnet, (5b) · · · needle tip portion, (6) · · · inclined plane, (7) · · · magnet protrusion.
Applicants Okra Gem Seiki Kogyo Co., Ltd. Representative, one figure, two figures, three figures,
four figures, five figures EndPage: 3
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