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JPS55162498

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DESCRIPTION JPS55162498
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural explanatory view showing an
example of a conventional optical power-trickle, and FIG. 2 is a structural explanatory view
showing an essential portion of one embodiment of the present invention. 1 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 ... Optical fiber. In the drawings, the same reference numerals indicate the same or
corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record player
provided with a cartridge for extracting a 4t signal as the intensity of an optical signal in the
sound groove of a record board. Photoelectric cartridges and light emitting diode (LED)
cartridges have been developed for use as record player cartridges as a means of upgrading the
audio apparatus and enhancing its performance. As shown in FIG. 1, the light source 2 and the
light receiving element 8 are disposed opposite to each other in the cartridge 1 as shown in FIG.
By arranging the jack 5 attached to the 1 bar 4, the notch lever 4 is moved by the displacement
of the sound groove of the recording disc 6, and the pin 5 is vibrated accordingly. A change in
the amount of light received by the light receiving element 1 is taken out as an electric signal.
Such a thing is improved in frequency characteristics, channel separation, phase characteristics,
distortion 1 mechanical impedance, etc., and contributes to extraneous life such as delicate
music. However, although the characteristics of the cartridge are improved, photoelectric
conversion is immediately carried out in the cartridge portion to convert the signal into an
electric quantity, and the signal is led by the shield line with the shield line. Ru. In addition, a
multicore shielded wire tends to cause an increase in crosstalk due to induction. Furthermore,
since the signal is a low level electrical signal, the drawback such as easy pick up of external
noise such as a motor can not be solved, and thus there is a problem that the advantage of the
photoelectric cartridge is not utilized. Instead of the above-mentioned light-receiving element
position of force-to-trick, the end of the optical fiber 81. (2) A person-face is faced, and the light
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1
intensity change received by the optical fiber is provided as an optical signal to the photoelectric
conversion portion provided in the vicinity of the multiplier / jector by this fiber without
performing photoelectric conversion at the cart IJ edge portion It is an object of the present
invention to solve the above-mentioned problems and to provide a high-performance record
player by transmitting. An embodiment of the present invention will be described below with
reference to FIG. In FIG. 2, 1 is a cartridge, and this cartridge 1 is equipped with a light source 2%
cantilever 4 similar to that of FIG. 1 and a 1 hinge 5 attached to the lens. The leading surface of
the optical fiber 7 is 1 in opposition to 2. ??????? rl: The tono arm 8 passes through the
inside of the player case 9 in which it is mounted, and through the connector 10 it is provided in
the vicinity of this amplifier and in the vicinity of this amplifier via the connector 10 (A?) 41Tii
will face.
6 in FIG. 42 is a record board. In the nfc record player configured as described above, when the 4
'░ hiccup Kutch lever 4 is the sound mvr of the record @ 6, the group 5 vibrates according to the
signal recorded in the sound groove. The end face of the optical fiber 7 receives the light emitted
from the light source 2 as a change in the amount of received light, guides this as an optical
signal to the photoelectric conversion unit by the optical fiber 7, and converts it to an electrical
signal here. In the case of stereo, of course, the optical fiber 7 of two left and two stones is used.
As described above, according to this invention, since the optical signal is transmitted from the
cartridge to the charge conversion unit provided in the vicinity of the pre-amplifier as the optical
signal as it is, in the middle of transmission by the wide bandwidth of the optical fiber There is no
deterioration of the frequency characteristics in the circuit, there is no picking up of noise due to
the electrical external source, and there is no induced crosstalk. Furthermore, since the optical
fiber is light and the light receiving element is not mounted on the cartridge, the effective mass
of the vibration system can be reduced, and the high frequency resonance frequency can be
increased to a sufficiently high level. ) Helps improve flt habits. In addition, it is possible to easily
cope with a wide band such as a CD-4 system 4-channel record. The photoelectric conversion
unit is provided on both sides of the conventional mass amplifier, but may be installed in the
same case or in an adapter type, and in any case, the retroactive source can be freely taken. 1
High-performance photoelectric conversion element For example, a PIN photodiode or an
avalanche photodiode can be used, which also has the effect of improving the characteristics.
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2
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