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JPS50133102

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DESCRIPTION JPS50133102
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an example of a
conventional moving-seven gnets 1 type stereo cassette, and FIGS. 2a and 2b are a block diagram
showing the actual case of the present invention and an external view respectively Output
terminal layout diagram. E и Middle tap, 8 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 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 1 Output terminal. Fig. 1 No. 113>
? 121325 j 1--C = bow = ? 1 ?---(: == ? ? ? 45 ? 45 real open 50-133 102 (2) FIG. 2 (l))
872 500 T3 ]]] 1500 TEART H81-4-
DETAILED DESCRIPTION OF THE INVENTION In the present invention, moving magnets are used
to change the magnetic flux linked to the generator coil fixed to the main body by the vibration
of the vibration system, and to output the induced electromotive force generated in the generator
coil. To change the storm of pickup cartridges such as Toyo. In general, pickup carts such as
moving magnet plastic, independent magnet type, etc. follow the sound groove of the record as
shown in FIG. 1, for example, showing only the left channel as an example of the moving magnet
type stereo cartridge. The motion of the imaging system 1 consisting of the vibrating tip 11, the
cantilever 12 and the magnet 13 is detected by a pair of left and right generating coils 3 fixed to
the body 2, and this detecting No. Similarly, the left and right pair 1 ? ? ? ? ? ? are
connected to both ends of the ring 3 and the external output terminal 4 provided on the body 2
is valved to the outside. The connection to the external output terminal 4 is usually performed by
the connection chip 5 as shown in the figure. When performing ordinary 2-channel writing with
this simple pickup cartridge (-it is preferable to obtain an output voltage as high as possible in
order to improve the / N ratio of the writing system and obtain a good reproduction sound. In
this ridge pickup cartridge generally used widely, the number of turns of the @ distribution coil 3
is often 1t00 to 8500 turns. On the other hand, when such a pickup cartridge is used to
reproduce, for example, a discrete 4-channel of 0D-4 system, the upper limit of the frequency
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band of signal output is 5 kHz in the 2-channel stereo, while In some cases, it is necessary to
reproduce the signal output, and the super high frequency characteristic is emphasized.
Therefore, when the discrete 4-channel or the like is reproduced by using the above-mentioned
pickup cartridge, the number of turns of the power generation coil 3 is reduced to prevent the
deterioration of the ultra high frequency characteristic due to the stray capacitance of the
connection cord or the like and the amplifier input capacity. It is necessary to reduce the same
group impedance, and for the discrete 4 channel, the number of turns per 1500 turns is used,
and the number of turns of the generating coil 3 is used. However, when the power generation
coil 3 is used in a small number of two-channel stereos such as 86, the output voltage may be
insufficient or it may be difficult to obtain good sound quality. Therefore, conventionally, for
reproduction of 2-channel stereo reproduction and reproduction of discrete 4-channel etc. =,!
L, ~ Separate Bicaras with different number of turns of generator coil 3,. ;-) ;-), y)) is compatible
with each other for the reproduction of two channel stereo reproduction and the reproduction of
four channels, etc. There was an open circuit. The present invention has been made in view of the
above-described circumstances, and an internal tap and an output voltage are provided by
providing an intermediate tap on a generating coil for detecting vibration of a vibration system
and providing a second external output terminal connected to the intermediate tap. The purpose
is to provide a pickup cartridge that has two different external output terminals and can be used
for 3-channel stereo or discrete 4-channel. An embodiment of the present invention will be
described below with reference to the drawings. Fig. 3 (a) on the left shows a moving magnet
type stereo cartridge according to the present invention in which only the channel is illustrated
as in the case of -hi, and the same parts as in Fig. In FIG. 0, '-11-?1 6 is, for example, a pair of
left and right generating coils having a total number of turns of 2500 and an intermediate tag
6m of 1500 turns, and this generating coil 6 is fixed to the body 2 as described above. The
power generation coil 6 has one end connected to the ground terminal 8 and the other end
connected to the output terminal 82 of # 11 and the middle tap 6 connected to the second
output terminal 83. The ground terminal 81, the first output terminal 82, and the second output
terminal 83 have one end centered on the body 7 and are arranged in a pair as shown in FIG. The
terminal 8 is configured. When S-channel stereo reproduction is performed in this way, power
can be generated between the left and right channels by connecting the ground side of both the
front convex side of the connection step 6 to the ground terminal 81 and the hot side to the first
output terminal 82. The number of turns of the coil 6 is 2500 turns, a large output voltage can
be obtained, and good 2-channel stereo reproduction can be performed. When the discrete 4
channel or the like is to be reproduced, the ground side of the connection chip 5'1 is connected
to the ground terminal 81 and the hot side is connected to the third output terminal 83 in the left
and right channels. The number of turns of the power generation coil 6 between these is the
number of turns between ground and the middle tap 6, ie, 1,500 turns, so that the internal
impedance is small and an excellent output with ultra high frequency characteristics can be
obtained. I can understand. By selecting the # connection position of the connecting shaft 5 at
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this point, it is possible to use both when high power is required and when low internal
impedance is required.
Also, since the internal isopydance changes depending on the connection position, the
characteristics of the middle-order region are normally used for correlation with the input
impedance of 1116, the correlation with the hair capacitance and the stray capacitance of the
tone arm and the tone arm. You can also. The present invention is not limited only to the
embodiment shown above and shown in the drawings, but can be embodied without departing
from the scope of the invention. As described above, according to the present invention, an
internal tap is provided by providing an intermediate tap on the power generation coil for
detecting the vibration of the vibration system; It is possible to provide a pickup cartridge having
two types of external output terminals different in output voltage and capable of selectively using
them according to the purpose of use.
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