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JPS512203

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DESCRIPTION JPS512203
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional stereo
pickup cartridge using a pressure-sensitive conversion element, FIG. 2 is a front view of the same,
and FIG. 3 is a perspective view of the main part Fig. 4 is a view for explaining the operation, Fig.
5 is a cross-sectional view of the main part of the close-up cartridge in one embodiment of the
present invention, Fig. 6 is a cross-sectional view of an elastic supporting member of the pickup
cartridge, Fig. 7 "a", "b" and "c" are front views of elastic supporting members in other
embodiments. 3, 3 / ... conversion element, 4, 4 '... braking support material, 10 ... needle lever 11
... needle, 12 ... elastic support member, 13 ... hole, 14 · · ·・ Amateur club, 15 ・ ・ ・ Part of the
holder. Fig. 1 Fig. 2-7 Fig. 5-Fig. 5 Fig. 5 Fig. 6 Fig. 7 Fig. 7 (1) G (b) 9 (C −-8-
DETAILED DESCRIPTION OF THE INVENTION The present invention is designed for reproduction
of a -48-45 type stereo record where two sound IIIK signals are wired to a husband, and in
particular, a nine pickup cartridge using a pressure sensitive conversion element. Further, mass
production is possible without loss of transmission efficiency by integrally forming an armature
for transmitting a signal recorded in the recording sound groove to the replacement element and
an imaging support member for supporting the needle lever. , CTo provide stable pickup
cartridge performance. 1) to j-, +7, 2, and t, the bitter-up cartridge already proposed by the
present inventor will be described with reference to FIGS. In FIG. 1N-FIG. 4, 1 is a body in which a
V-shaped concave portion 2 is formed, and 3.3 'is a combination of U'lnlta (C) 1C of the above
integral 1 through a brake support 4.4 /. The pressure sensitive supported variable forest
element 6.5 'is a lead wire drawn from the variable displacement element j, 3', and the end of the
solid lead #a 6 ° 6 'is! -It is 4itM to the child 6, 6 '. Reference numeral 7 denotes a support
attached to the upper lI [8 @ body 1]. A projecting piece 8.8 'is integrally formed on the support
7, and a hinge 9 is attached. Reference numeral 10 denotes a needle lever attached to the abovementioned Amatoma 9; at the tip of the needle lever 10, a needle 11 is provided and φ is
provided. As shown in FIG. 4, when the needle 11 follows the sound groove of the record, the
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needle lever 10 is displaced in the direction of the arrow. For this reason, it is displaced by the
conversion element aH amater 9 as indicated by a static point and generates an electrical signal.
In the pickup cartridge of the above structure)) f * 3 is formed of a relatively hard material which
is rounded to reduce the transmission loss because the armature 9 transmitting the vibration of
the needle lever 10 to the conversion element 3.3 ' The supporting member 7 needs to be made
of a relatively soft-material rounded so as to improve the tracking of the recording groove. As
described above, in the case where the vibration system is made of two kinds of true materials,
the needle lever 10. The bond between the Amate air 9 and the vibration support material is
made with an adhesive or by attaching the needle lever 1 o to the attachment member 9 by
means of an adhesive, and the needle lever 1 o using a wire, a nylon rod, etc. Although it is
conceivable to draw in the direction opposite to the needle tip, in the case of first case, it is
difficult to assemble, and there is a disadvantage such as a large buff of mass production
performance. The present invention is intended to eliminate the above-mentioned conventional
drawbacks, and is characterized by integrally forming the armature 9 and the support T in the
above-mentioned conventional example. An embodiment of the present invention will be
described below with reference to FIGS.
FIG. 6 shows a conventional example of amateur and supporting material 7), 1, th ′ 4-1. An
integral elastic support member is shown, and a hole 1s is formed in the central portion of the
elastic support member 12, and a large-sized ate portion 14 is formed at the front. . When the
elastic support member 12 shown in FIG. 11116 is supported on the housing, as shown in FIG. 6,
the elastic support member 12 is inserted into the small diameter portion 16 of the mourning
holder collar 16 which protrudes from the housing. At the same time, the needle lever 1 o is
inserted into the hole 13 of the elastic support member 12 up to the surface where the amaché
portion 14 contacts the conversion element 3. The needle lever 10 and the small diameter
portion 16 are disposed so as to be in point contact or completely separated in the hole 1s. FIGS.
7a, 7b, 7a respectively show the shape of the elastic supporting member according to another
embodiment of the present invention, and in the case of a turn over type cartridge, b, C show the
case of a stereo-cartridge. -. The present invention is configured as described above, and since
the elastic supporting members are formed of the same material, the transmission loss is small,
and i9, Amat's 11131 e S-shaped, "A",> -i66. The thickness of the base can be reduced, and the
thickness can be reduced as it is separated from the needle lever 2. If the equivalent beam is
used, the vibration system O mass can also be reduced. Is thin, and evaluation is soft, and the
danger seen from the needle tip can be increased, and the vibration fulcrum of the needle lever is
positioned halfway between the needle lever and the needle holder 10, and the vibration fulcrum
becomes clear Look at what has the advantage of town. As described above, according to the
present invention, it is possible to integrally form the AMACHER portion and the vibration
supporting portion with a material having elasticity, but according to the present invention,
according to the present invention, the assembly can be performed without losing the
transmission efficiency. As well as being easy, it is possible to reduce materials, reduce variations
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in mass production, and so on, and have various excellent nine advantages.
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