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JPS4731601

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DESCRIPTION JPS4731601
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a conventional device, and
FIG. 2 is a circuit diagram of the device of the present invention. 1- 47-160 (2) Fig. 2 = 2
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a 4- and 2-gen stereo player. The conventional device interlocks with the switch (83 to 88) for
discriminating the type of the tape cartridge and switching the input circuit and the indicator
circuit as shown in FIG. 1 and the head switching cam (6) at the time of reproducing the dual
tape cartridge. A method has been proposed for reproducing 4- and 2-primary tape cartridges
using switches l) and (S,) for selecting a reproduction channel by the auxiliary cam (6). When the
tape is inserted, the four-way / two-way automatic changeover switch (53 to 86) is in contact
with the contact (1), and the changeover switch (S2) and ('8e) are in contact with the contact (a)
KQ) II ! The signal transmission circuit and the indicator circuit are set as the four-way
reproduction position. When a binary tape is inserted, the changeover switch (85 to 86) is at the
i6 point (a) KJII! Since the output side of 1st and JIg2 output increase 1-11 width circuit (6 mu)
(3B) is connected, 1g1 · second IJ2 output amplifier circuit (3 mu · 3B) switching switch (3 mu ·
3B) An audio signal will be input through 8), 1). At this time, the head position is lowered by one
stage when the head position switching cam (5) is rotated in the direction of the arrow. At this
time, since the leaf spring (7) for detecting the unevenness of the auxiliary cam (6) is not
deteriorated, the signal of the first left and right preamplifiers (2A and 2C), that is, 0H-2 is
reproduced. Further, when the head position switching cam (6) is ima, the head position is at the
upper stage, but the leaf spring (7) for detecting the unevenness of the auxiliary cam (6) falls into
four parts, and thus interlocks with the leaf spring (7) Switch (S. Switch from the contact ta) of 8
□) to the contact (b) to regenerate CH-3. Similarly, CH-4.CH-1 is repeatedly reproduced.
Therefore, in the above method, it is difficult to miniaturize the device due to the complexity of
the switch group, auxiliary cam, and switch mechanism interlocking with this for using 4 or 2
sources, and a large number of switches are used in the input transmission line. There were
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drawbacks such as contact failure accident and increase of manufacturing process and cost. The
present invention has been made in view of the above-mentioned disadvantages. The
embodiments of the present invention will be described below. A magnetic head element 1 has a
magnetic head element 47-3160-1 04 "j 43" ((1 m to ID) connected to each channel and
performs magnetic switching in 12 steps by a head position switching cam (5) It is a head. 2 and
2C are a first right preamplifier and a left preamplifier of M1 having the same power supply
circuit, and one side of the power supply circuit has a diode (D1-) and (D-) via a channel indicator
notch (S5-) The fixed contacts (b) and (a) K are connected.
Reference numerals 2B and 2D denote a second right preamplifier and a second left preamplifier,
both of which have the same power supply circuit, and one side of the power supply circuit has a
diode (D? And (d) the fixed contacts (d)... (N) of the channel 3 and the indicator switch TS). The
above-mentioned channel indicator switch iB, is provided coaxially with the rad position
switching cam (5), operates an electromagnetic solenoid (not shown) with the conductive foil at
the end of the dip, and the head position switching cam IIS, When 1 is rotated, the movable
contact is also rotated at the same time .: @ Mark for channel indicator J-marked □ (s) (D # A
fixed point (IL) is 4-way · 2-way automatic switching Switch (8,) at one fixed contact point (a), 47
160 ε \ ε: 4), 47-31601-054-k "(8 g) (D fixed contact point tb) is a # switch switch (82) Solid 5i
of the switch (87) linked with The contact (alK), the fixed contact (e) of the switch (85) is the
moving contact (111 K) of the changeover switch (S, f), and the fixed contact (d) Fi of the switch
(85-). ) Movable contact (0) K each connection field, and the switch (8 da) possible JE! The l
contact (0) is grounded. The switches (S7) and (S2) which are switched in conjunction with the
above-described 4- and 2-way automatic changeover switches (S3 and (8)) are Jgl right preamps
(2A) and second right preamps <2B). Transmission line, and 1g1 left Guriamp (2C) and J1! The
transmission lines of the left pre-amplifier (2D) of 2 are connected between the respective
transmission lines in order to discriminate the insertion cartridge and short-circuit it, and the
father mentioned above switches 9 (S! ) And (82)! 9 signals are connected to be amplified by the
respective output amplifier circuits + 3A to 5D) K and to be emitted by speakers (4A to 4D). Also,
I! Of 4- and 2-way automatic changeover switches (8 □) and (S,). The one-foot anchor point is
one having indicium 5-47-31601-06'idicator-hun 1 (8a-eld) K * # n to indicate regeneration
channel fi / respectively. Next, the operation of the dormitory example of FIG. 2 will be described.
When the 4-way tape cartridge is inserted, the insertion cartridge is identified and the 4-like · 2way automatic changeover switches (sl) and (8,) are interlocked with the + I [changeover switch
(8, · 82) Switches (S3) and (S,...) Are contacts (a) K connected n1 or the movable contact +01 of
the switch for channel indicator (S5) and the fixed contact (a) of the switch (eight minutes) are
grounded .
-Talil 14 of the first left and right preamps + 2A · 2C is a diode (D! ) And the second left and right
preamplifiers (2B · 2D1 one power supply) via the diode (D4) and the contact 1a of the 4-way · 2-
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way automatic changeover switch (8r) channel indicator switch (8) ) To the fixed contact 1m) to
operate, each channel's signal is input to each output amplifier circuit (3A to 3D). , Speakers (4A
to 4D) are voiced into four-way stereo. −6-6-j, (, ζ, 47-31F301 ′ ′ 07 ° 1, 1), ゝ. ζ J The
switches (S3) and (8f) interlocked with the above-mentioned 4- and 2-source automatic transfer
switches (S and 82) are the contacts (IL) Km and l! The channel indicator switch (8, 10 contacts
(Ll) is located on the fixed contact (C) and the dead (2 likelihood tape (! Display playback status
of H-3) KC! It is configured to indicate that the reproduction is H-1. Furthermore, when the
binary tape is inserted after the above operation is completed, the 4- and 2-ary automatic
changeover switches (Sl) and (S2) which are switched depending on the cartridge shape are the
contacts (&) K% III and the switches (81 and S2) Switch to interlock (day? ) And (S,) are switched
to the contact point tb + to be a binary reproduction position. In this state, since the movable
terminal of the switch for channel indicator (8 q) is at the fixed point a) position of the fixed point
a), the first left and right preamplifiers (grounded via two power sources, one power source 11 #
'i diode (D2) [1's left and right preamps (2A and 2C) operate and CH-i left / right 1 of the binary
tape! ) To the output amplifier circuit. At this point, one end of the output transmission line of the
first right preamplifier (2) is connected to the contact (a) of the 4 likelihood · binary automatic
switching '-7-47-31601-04j · d switch (Sl)! iI! Because it is connected, the output of the M1
right preamplifier (2) is input to the first right output amplifier (6) and the second right output
amplifier (3B). 4A-4B). The same amplification action is performed in the left side regeneration
system. The indicator circuit of the reproduction channel ~ is grounded via the indicator lamp
(86)-the contact (a) and movable contact (U) of the switch (85) for the channel indicator, r (! The
indicator lamp (8a) during H-IJ reproduction lights up. 'Next, with the conductive tape at the end
of the endless tape, move the magnetic head position to CM-2 by hand or by hand and at the
same time move the channel indicator switch (S5)' s movable contact + ml) the fixed contact (a)
→ (1) ), And since the power supply side of the left and right preamps (2 and 20) of 1 is
grounded via the diode (D,), “regenerate cH-2J and display lamp (8b) Lights up.
11jcl Endless tape end and magnetic head position,: to, knee a- :. '' 47-3160 1-09-,----,------------------CH, IK return to CH-IK position, channel indicator knee switch + 8. ) Move to the fixed contacts
(b)-(e). Due to the movement of the movable contact (11), the-power supply section of the left
and right preamplifiers (2B and 2D) of M2 is grounded via the diode (D4), and the second left
and right preamplifiers (2B and 2D) operate to cause CH- 6t-to play. Similarly, CH-4.OR-1-.trepetitive regeneration is performed. Incidentally, in the above-described example, the first left
and right preamplifiers (2A and 2C1 and the second left and right preamplifiers (2B and 2D) are
alternately operated by opening and closing the circuit of the single current Isj @. ~ D hard tdormitory example and reverse connection and switch ~ indicator switch (S,) pJ differential bond
point (0) K + power supply is connected, 10 power sources are connected and it is good even if it
makes ground 9 places Also, if the internal resistance of the display knob tba to 8d) is small and
malfunctions, inserting a resistor or a diode between the fixed contacts of the switches (83) and
(S +) and the display hump function to prevent the malfunction. As described above, the device
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according to the present invention has a simple circuit configuration and can perform 9- + 731601-10 wan 7% W concave tau τ open and λ 1 λ ear 7 王 U U channel switching. Because
there is a mechanism is simple and I - has Patent # of reduction of manufacturing processes and
cost reduction in size and become field these are those Naru effective and beneficial.
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