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JPS5625899

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DESCRIPTION JPS5625899
Description 1, title of the invention
コンデンサカートリッジ
3. Detailed Description of the Invention The present invention relates to a capacitor cartridge,
and in particular, to improvement in the case of using a pair of positive and negative electrets as
its fixed pole. 0 As is well known, the capacitor cartridge used for disc record reproduction is its
pickup As a part, it has a movable body interlocked with the cantilever and a fixed pole opposed
to the movable body, and the record needle traces the sound groove and converts the vibration
generated due to the change in the capacitance between the two electrodes for reproduction It is
intended to obtain an output. FIG. 1 shows a configuration conventionally known as such a
capacitor cartridge, in which a pair of positive and negative electrets are disposed at equal
intervals (a) and (a) on both sides of a movable body 120 supported by a cantilever 11,
respectively. The fixed poles 131 and 132 are provided in a pair. And, such a capacitor cartridge
operates as a so-called coprime (positive) resistance, and in principle has the advantage of being
able to eliminate distortion and improve output stability. However, in fact, the distortion could
not be eliminated for some reason, and thus the output stability could not be improved. Thus, the
present invention has been made in view of the above points, and in the complementary type
using a pair of positive and negative electret fixed electrodes, the distortion is eliminated and the
output stability can be improved. The purpose is to provide EndPage: 1 with a new capacitor
cartridge. That is, in the capacitor cartridge according to the present invention, a pair of positive
and negative electret fixed poles are disposed at an interval at which the negative charge side is
small and the positive charge side is large. Therefore, the present invention is characterized in
that the distortion is eliminated by equalizing the voltage of the substantial absolute value of
both fixed poles seen by the CiI pole. Hereinafter, an embodiment of the present invention will be
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described in detail with reference to the drawings. That is, as shown in FIG. 2, with respect to the
movable wedge 22 supported at the base end of the cantilever 2, a pair of positive and negative
electret fixed poles 231. In this case, the position of the movable rod 22 is charged only from the
center (b) of the positive and negative electret fixed electrodes 231.232 from the center giving
the same interval as (a) and (a). It is intended to be closer to I14'232. As described above, it is
practically impossible to eliminate the distortion when the movable rod is placed at the center,
but when the cause of this is investigated, equal voltage (load) is given to the positive and
negative electrets Even so, it was found that there was a run in the substantial absolute value
voltage of both, and it was found that a higher voltage would be applied to the electret fixed
electrode of positive polarity charge by any means.
For this reason, as described above, if the position of the movable & 22 is not the center between
the positive and negative electret fixing% 231 ° 232 but the negative charging side, the movable
wedge 22 looks like both sides 11! 23ノ。 Since a substantial absolute voltage between 232
can be equalized, so-called static balance is correctly made to prevent the occurrence of
distortion caused by the fact that the balance is broken, and it is necessary to grind the output
stability accordingly. It is possible to exhibit the essential functions of the complementary type in
which it can be improved. By the way, although it is not so clear at the present time as to why the
higher voltage is applied to the electret fixed electrode of positive charge, one of the reasons is
that the electret of positive charge from the viewpoint of manufacturing It can be considered that
the reliability of the electrification is not improved from the beginning of the day when the
development of the negative polarity electrification from the shallow place. Also, in connection
with this, even if the moving electrode contacts the electret fixed electrode, it is considered that
the electret fixed electrode of the negative-polarity titt has a lower rate of voltage drop, so this is
also movable from this point It can be said that it is preferable to have the position of the
movable wedge as close to the electret fixed pole of the negative polarity charge, in order to
avoid the hook touching the electret fixed pole of positive polarity charge. The present invention
is not limited to the above-described and illustrated embodiments, and various modifications and
applications can be made without departing from the scope of the present invention without
departing from the scope of the present invention. Therefore, according to the present invention,
according to the present invention, the both sides of the movable rod supported by the cantilever
are not equally spaced as in the prior art, but the negative charge side is small and the gap is on
the negative pole side or the dog side. By providing a pair of positive and negative electret fixed
poles, both fixed poles 0 seen from the movable rod can be equalized substantially in absolute
value voltage to eliminate distortion and thus contribute to improvement of output stability E. It
is possible to provide an improved very good complementary type capacitor cartridge.
4. Brief Description of the Drawings FIG. 1 is a structural explanatory view showing a
conventional capacitor cartridge, and FIG. 2 is a structural explanatory view showing one
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embodiment of a capacitor cartridge superior to the present invention lIc. 2 · · · cantilever, 22 · · ·
movable rod, 231.232 · a pair of positive and negative electret ",". Applicants Attorney Attorney
Takehiko Suzue EndPage: 2 1 1 才 2 End EndPage: 3
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