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JPS57117888

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DESCRIPTION JPS57117888
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (electrical circuit diagram showing one
embodiment of the present invention; FIG. 2 is an electrical circuit diagram showing one
embodiment of the present invention in the case where the other circuit is ?=? is there. 1.2 и и и и
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и и и и и и и и и. , 7- '----Speaker 8, 8 иии Main switch, 9, 10 и и и First switching switch, 11.12 и и и Second
switching switch, 13. 14 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
иииииииииииииииииииииииииииииииииииииииииииииииииииии
DETAILED DESCRIPTION OF THE INVENTION 1-Hook 1.degree. [This invention has a headphone
switching device, in particular, a 4-wire stereo or left and right anode wire with a left and right
anode wire and a cathode wire and a shared cathode wire. The invention relates to a switchable
device for headphones, connected between a 3-wire stereo and both left and right speakers.
When enjoying audio using stereo, it is extremely convenient if audio can be enjoyed either in the
case of the speaker alone, in the case of the speaker and the headphone, or in the case of the
headphone alone. For example, if this is applied to a car stereo and a car speaker in the vehicle
compartment in particular, when the driver enjoys the sound from the car speaker while
traveling while the passenger enjoys the sound from the headphones, the driver is also included
while stopping It is a case to enjoy the sound from the headphones. In the case of such a car, it is
not only considered to be convenient, but headphones are used to cancel out the ambient noise,
and compensate for the poor sound quality generally arising from the lack of ability of car
speakers, and enjoy extremely good quality voices. it can. In this case, the present invention
provides a headphone switching device which can be simply attached between a stereo and both
left and right spins and -2 jaws, and can provide convenience and high quality sound to a person
who enjoys sound. . Hereinafter, the configuration of the present invention will be described in
detail based on the drawings. As shown in FIG. 1, which is an electric circuit diagram showing
one embodiment of the present invention, the left channel anode line terminal 1, the right
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channel anode line terminal 2, the left channel cathode line terminal 1a, and the right channel
anode line terminal 2a. Headphones between the 4-wire stereo (not shown) or the 3-wire stereo
(not shown) having the cathode line terminal 3 common to the left and right in place of the left
and right cathode line terminals 1a and 2a When the sound is only the left channel speaker 6
and the right channel speaker 7 and is connected to the terminal unit 5 (shown in the figure), in
the case where these speakers 6.7 and headphones (not shown) are shared, And on the left and
right side channel side, one main switch 8 eventually makes it possible to switch to any of the
case of only headphones (not shown). Incorporates a pair of first changeover switch 9.10 and
second changeover switch 11.12 which can also be interlocked by-░ -001 shift, and in
particular, in the case of the four-wire stereo, it is insulated so that the left and right corner
electrode lines do not collide. While, a 1/1 transformer 4 connected as a common cathode line
and connected to the terminal 5 of the headphone (not shown) is incorporated in one channel
side (the left channel side in this embodiment).
For example, when switching to the left in the figure by the main switch 8, the anode line
terminal 1.211 first switching switch 9.10, the speaker 6.7, the cathode line terminal 1a, 2a or
the cathode line terminal 3 on the left and right channels respectively. A circuit is formed, and
sound is emitted only from the left and right speakers 6.7. When switching to the center in the
figure by the main switch 8, in addition to the circuit in the case of switching to the left on the
left and right channel sides respectively, the anode wire terminal 1.2 и second switching switch
11. A circuit including terminals 5 and cathode line terminals 1a and 2a or cathode line terminals
3 of a 12 @ head phone (not shown) is formed, and sound is generated by both the left and right
side speakers 6.7 and headphones (not shown). It is emitted from If the main switch 8 is switched
to the right in the figure, the left and right channels are respectively provided with consumption
circuits including the protective resistors 13.14, and the above-described circuit when switched
to the left is not added. The circuit in the case of switching to the center is formed, and the sound
is emitted only from the headphones (not shown). By the way, according to the present invention,
high quality sound from headphones can be enjoyed arbitrarily in relation to the speaker, but it is
convenient to visually recognize the state when using headphones is there. For example, there is
a case where a person who uses headphones may leave it without operating the changeover
switch for some reason. And again, it is more convenient if you can adjust the volume when using
headphones. For such a case, the present invention can also easily incorporate the display circuit
15 and the volume control circuit 16 as shown in FIG. 2 which is an electric circuit diagram
thereof. The display circuit 15 exemplified in the 5-prefecture 003 drawing is based on a voltage
doubler rectifier circuit composed of a light emitting diode 17, a resistor 18, a capacitor 9.20,
and a diode 21.22. It is incorporated between the 2-switching switch 12 and the cathode line
terminal 2 a or the cathode line terminal 3. Further, the volume control circuit 16 incorporates a
changeover switch 24.25 interlocked by the main switch 23 so as to be adjustable in three steps,
and the second changeover switches 11 and 12 of both channels and the headphones (shown
(Not shown) and the terminal portion 5 are incorporated. As described above, the present
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invention can be easily attached between the four-wire or three-wire stereo and both the left and
right speakers, and can extremely conveniently and arbitrarily provide high quality sound from
headphones. effective.
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