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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a connection diagram showing an embodiment
of a switching circuit according to the present invention. 1 ...... main body side provided with the
rotary Sui Tutsi, 2 ...... movable contact, 3 ...... rotation sleep 4-7 ..... 1 which has been linked
ratchet mechanism or the like Fixed contacts, 8, 11, 13, 13 /, 20, 20/21, 21 / E, operating parts,
14, 14 '@ 19t 19 / ..... Transistor elements, 15 ... Power terminals , 16, 16 / 117,17 / ...... pilot
lamp, 18,187-river ... diode element. H-223-
Detailed Description of the Invention Si-1 (1) 1) The present invention is used as a display device
for a performance channel used for in-vehicle stereo performance installation, etc.! In particular,
it is possible to reduce the number of cables connecting the main unit to the operation unit by 5
or less, and to make it possible to eliminate the need to change the number of cables. It is a thing.
As known in the world, stereo equipment tickets that enable remote control are connected by
several cables between the main body and the main body of the ship with a single cable, 0 N-OFF,
volume control, It is possible to remotely control the switching of the +1 J channel etc., and it
requires four cables t110 to F1120 or more to connect the main unit and the operation unit. A
variety of handicrafts have been authorized to minimize as much as possible. I5) At this point, the
present idea is to improve the point, and to provide a switching circuit capable of halving the
number of cables for channel display necessary for the switching operation of the stereo
performance device or the tape track. so. 12)「]1)である。 The present invention will be
described in detail based on the illustrated embodiment. In the attached drawings, reference
numeral i11 represents a channel i15 provided in a book #fi section @ such as a car stereo, a
rotary switch for display, and the like. Rotation at the movable contact (2) of the rotary switch-(3)
interlocked with the ratchet mechanism for nettape track switching, and every time the playing
track of the tape is switched, tIJ 'Q point (2) Fi solid From the contact point 4) to the contact
point 15) → contact point 11) point (6) → contact point (rotated by the order of 71, the movable
contact 121rjO is grounded). Incidentally, the contact point (4) and the contact point (5)
correspond to the first channel and the second channel of the tape track, and the contact point
(6) and the contact point 1) are the third channel 15) and the fourth channel of the tape track.
Correspond to Also, based on the contact point (4), resistance (8) is Il! Then, the other end of the
resistor (8) is shared with the contact (2) and connected to the operation Wa via the cable (9).
Further, (6) 1c connects the resistance barb, and the other end of the second resistance (3) l pile I
is integrated with the cable (9) via another cable 115 which is bundled together Connect to the
step 1I60. Next, in the operation member, the base terminal of the transistor element U is
connected to the cable (9) via the resistor a5, and the nuclear transistor element (I4 is the emitter
terminal of the K child I connected to the terminal 1) And the collector terminal to the pilot lamp
q ・ and the lamp.
Incidentally, the pilot lamp f1e and the lamp indicator for at + t-t tape track are used for 1
channel for Pi-foot run IO) group α · Fil and for pilot channel 鱈 for 2nd channel. . The other end
ri of the pilot lamp I is connected to the cable through the diode element tIe, and at the end 411
of the pilot lamp member, a resistance cmec connected at one end to another pace + K) pace
terminal KJI of the element 0 is connected. Further, the other end of the pilot lamp 1leO is
connected to the core terminal of the control transistor element @ 慟, and the emitter terminal is
grounded via a resistor. The 1- "(4 + 1) cable 112 111 K connected is of exactly the same circuit
configuration as that described above connected to the cable □ (9), and the end of the cable 13
has a resistor I 'and a diode The other end of the resistance element 5 'is connected to the pace
terminal of the transistor element I', and the other element of the diode element D 'is connected
to the other terminal of the transistor element I' Connect to the terminal. The emitter insulator of
this transistor element at is connected to a resistor whose other end is grounded, and the
collector terminal of the nuclear transistor IO is connected to the collector terminal of the control
transistor element a4 'through the pilot lamp ringing'. , And the emitter terminal of the element
α4 'is connected to the terminal Fi. i) Insert the pilot terminal a 'of the collector terminal and
resistance of the coughing element I' and the resistance '' 15) Insert the pilot lamp a η 'of the
KFi dormitory 15) ・ 閃 榛 ・ ・ 音量 ・ 6 A switch, a switch for channel switching, etc. work
together with the above-mentioned pilot lamps α · ae ′ and a 鰭 ′ ′ 5) 1 . The present
invention has the configuration as described above and works as described below. That is, when
the channel selector switch provided in the operation W6ntsN is operated 5, the ratchet spring
on the main body side operates, the rotary switch (11 rotates its movable contact (2), and the
contact connection is made The cable (9) is switched from 4) to the weight 17 sequentially, and
the circuit connected to the cable (9) and the large one path connected to the cable 03 consist of
exactly the same circuit configuration 10). I will light only on the road that leads to (1) When the
movable contact (3) of the rotary switch fi + is in contact with the securing contact (4) K by
operating the chicken- nel switch, the resistance is connected to the operation 1ll I side 15)
resistance connected to the base terminal of the transistor element t14 The diode and the diode a
are grounded via a resistor 8) on the main body side.
As a result, the transistor element 141111 is formed, and the current voltage of the pilot lamp 1 ·
and the HK # i end 1 (6) 1 element as is applied. However, because the resistance + 8111 '' pilot
lamps ae and those with a resistance tube that is four times more manageable than the filament
resistance of 11 eta, the inter lamp voltage of pilot lamp η reaches this by 5 do not do. At this
time, since the base current flows through the coughing pilot lamp ト ラ ン ジ ス タ, the
transistor element IK attacks the transistor element usri as light operating condition, and a
certain fluffer electric machine flows, and the pilot lamp 点灯 lights. That is, when the first
channel of the tape track 10) is switched to less than the first channel of the tape track 10), the
Kri pilot lamp H turns on to indicate that the active track is the first channel. Since the resistance
has a variable resistance value between the resistance anti diode element and the element, the
striking voltage is applied to the pilot lamp 15 a so that it is sufficient to light it. Next, when the
performance of the first channel is completed or the main channel of the second channel is
switched during the performance, the resistor a1 and the diode element 鱒 are switched. Is
directly grounded without the aid of a resistor 8). At this time, since the base current flows to the
transistor element 4 through the resistor as 5, the nuclear element q continues to operate in the
state 5, and the pilot lamp aη KFi diode element as is merely inserted in series, The IC has a
sufficient current for lighting it, while the transistor p element In does not operate because it is in
the state and 1 that the resistance of the diode element In) is raised by the resistance crane. The
pilot lamp 11 @ Fi does not light up. Incidentally, in the rotary switch 111, in the course of
moving the movable cylinder a (2) from the fixed point (4) to the fixed contact point (5) k 15) the
resistance lIj and the diode electron a @ m ground repulsion force) The pilot lamp 1- and a-force
does not light up either because the line is broken 6 "(躬 1-1) Furthermore, the channel selector
switch is operated to fix the angle baa (2) When switching to the contacts 16) and (71, any one
of the pilot lamps q 'and 1' of the operation unit connected to the cable aswc is turned on instead
of the cable (9) K, and the pilot The ramps 4 'and 11 eta' operate exactly as in the predication O
pilot ramps xi and 11 eta.
That is, when (2) is fused to the contact point (6) to the movable rod of the rotary switch, the
pilot lamp nts' lights up, and when the movable contact point (2) contacts the contact point (7)
Buke power is on twice. As described above, according to the present invention, the transistor
element is connected to the pilot lamp for displaying the operation part-KQ in displaying the
working channel of the tape track in a car stereo etc. Since the bias state of the transistor
element is switched to the pace terminal by using the series f: ll + resistance, the rotary switch
provided on the main body m * connects the bias setting resistance in the transistor element to
fll1) It is possible to turn on any of two 1-Pilots playing cards with Oa route construction simply
by switching whether or not, and the number of cables connecting the main unit and the
operation unit can be reduced to half of the conventional number . In addition, this invention is
not used for displaying the channel of a tape track especially in car stereos etc., but it is
necessary to connect a relay circuit or an electromagnetic plunger or other controlled device
instead of a pilot lamp. Since it can also be used, it is suitable for the control of various devices
with a small number of pieces10), and exerts extremely excellent practical effects.
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