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JPS5099501

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DESCRIPTION JPS5099501
Patent Office Secretary Mr. Muraka-Namer Murakami Susumu (1 other) Hiroshi [Fa] Patent
applicant address Osaka Prefecture Kadoma city Oda Kadama address 1006 Name (582)
Matsushita Electric Industrial Co., Ltd. Representative Masashi Matsushita ? Japan Patent Office
0 Japanese Patent Application Laid-Open No. 50-99501-Serial No. ? 7672 in the Office,
Specification 1, Title of the Invention
Video disc pickup
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a playback head
for a video disc. The pickup for video disc, which is a conventional pressing and reproducing
method, uses a single needle to perform recording, recording, and signal reproduction of a record
groove. Generally, in video discs, a great deal of information has to be excavated in a limited
amount of accumulation, so high density recording and paper cutting, the width of the cutting of
the cutting width, etc. are as small as several ?s. It becomes minute. Therefore, when playing
back a video disc, the forced feed flK is sent so that the player can play and record the record
groove. However, due to the friction between the record and the needle, the surface record is
electrostatically charged and adsorbs the soot, causing a needle jump and dropout. If the needle
pressure is increased, the followability of the needle will be improved even if there is a little #I],
but it is not a hindrance to disturb the high frequency signal reproduction, but rather for the
stable image reproduction by shifting the needle wear. It will be counterproductive. The present
invention solves the above-mentioned drawbacks, and an embodiment of the present invention
will now be described with reference to the drawings. FIG. 111 shows the video disc pickup of
the present invention. It is characterized in that the support 6 is provided with the signal
reproduction needle 2 and the tiger and the king needle 3. The signal reproduction needle 2 is
firmly fixed to the piezoelectric transducer 4, and the mosquito piezoelectric transducer is softly
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held by the elastic damping layer 6. The change in pressure between the record 1 and the needle
2 is taken out of the piezoelectric transducer as an electrical output. In this signal regeneration
method, the tiger and the king needle 3 are fixed to the same support and the EndPage: 1 gloss,
when needle pressure is applied (+ 1l ? the regeneration needle is held elastically so a relatively
small pressure is Although it only adds, strong pressure is applied to tiger and king needles. And
to increase the pressure marriage of the needle now Tiger, WtL in the King, yes. In addition,
tigers and king needles are required to make sharp edges like the signal regeneration needle, and
they need to be sharp-even if the needle pressure is increased, it is not possible to damage the
unevenness in the record ridge even if the needle pressure is increased. In addition, this and
Maitora, the needle for the king is signal re-maining and I. It is not necessary to have a sharp
edge because it does not need sharp edges. Therefore, 8 strong pressure will not damage 10
records. Even if there is an eccentricity or ups and downs of the 7-d in the support pin, the signal
reproduction needle does not change the pressure of the needle, so that the change in needle
pressure does not occur, and the stability is <S Can follow. In this case, it is not necessary to track
the ?elastically weakened layer? because it is relatively a prefectural song.
When the tracking-is placed on the left side of the ten records of the signal reproduction needle
shown in Fig. 1 (as opposed to the circumference of the ten records of the signal reproduction
needle, the tiger and the king needle fly away the dust attached to the eyebrows) Signals can be A
method of giving a thousand-power difference will be described in FIG. 6 is a support, 2 is a
signal reproduction needle, 6 is an attenuation layer thereof, 3 is a tracking needle, and 7d is a
spheroid. Tiger, King needle long by h, kerber t to make the support body 7 harder than the area
soak 6 K Pager i Tiger, Add needle pressure to King needle, signal regeneration needle % Can be
guided so that the record groove can be traced. '$ 3 + g came from the top of the needle. ???
?? The signal regenerating needle 2 and tiger and king needle 3 are sprayed on the support 6
like a threshold. At the time of reproduction, the tracking needle traces a signal reproduction
needle and Vta, so a lot of dust adheres, and if both travels-interval-(duration 41 in 1 figure) of
both hands is not sufficient, it adheres to the tracking needle This interval must be taken, as
extraneous debris can have a false effect on the signal reproduction needle. By arranging the
needles in the width direction of the track as in the fourth L3N, the width of the support 6 can be
reduced. In this method, when a dynamic pressure is applied, the needle at the tip is smeared and
pressure is mainly applied to the needle at the tip of the needle until the fulcrum of pressure is
shifted. For this reason, it is desirable that the signal regeneration needle 2 be distributed on the
receiving side at the tip of a tiger and a king needle 3-support. -It is also difficult to trace both
hands bright and tiger, it is practically difficult and it is important to distribute the tiger and
medium needle to the inner cylinder 411 of the record rather than the signal regeneration needle
from the point of removal of the gods. It is preferable. As described above, the stable tiger and
king of the video discon are conventionally pointed to, and as a method, it is attempted to train a
traffic signal, out and tiger, and king from a single wood needle VC, and signal detection is
necessary. Pressure -1? ?? 9 ? King is secure enough, and in the present invention, the
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present invention supports #iK, 1 signal regeneration needle, tiger, king needle, and an eccentric
9th surface of the record. In order to convey to the signal regeneration needle on the same
support, the signal regeneration needle has an almost constant pressure and contacts with 1
conid-1 and-due to the arrangement reached, the tiger, the king needle becomes dust or dirt
Stable tracking of the signal regeneration needle is ensured to eliminate the D, D, D and K out of
the needle, and can eliminate the drooling and dropout.
4, Brief description of the drawings Fig. 1 ?? A block diagram of one embodiment of the
present invention, Fig. 2 is a tiger, the tax of the method of pressing the '4mK pressure force on
the king needle-Fig. 1, * 3 RH Fig. 4 is a distribution diagram for not giving a signal reproduction
needle, and Fig. 4 is a layout diagram of the needle in the case where the needles are cascaded in
the throat direction. 2 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и и и и и и и и и и и и piezoelectric transducer, 6 и и и и. .... Supporter. One innocent patent
attorney Atsushi Nakao-man and one other EndPage: 2 (1) inventor (2) agent ? EndPage: ?
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