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JPS58147298

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DESCRIPTION JPS58147298
[0001]
The present invention relates to an audio fjA @ circuit, and more particularly to an audio signal
circuit associated with an audio signal jack used for a human h @ path such as a stereo device.
FIG. 1 is a diagram showing an amplification unit and a speaker unit in a so-called system
component-conventional conventional stereo device. In the figure, an amplification 112 is
connected to, for example, the right (hereinafter referred to as R) side speaker 1. Further, for
example, an amplifier 4 is connected to the left (hereinafter referred to as) speaker 3. Then, the
jack 5 is connected to the amplifier 2, and the jack 6 is connected to the amplifier 114. A plug 7
connected to an R signal output terminal of another component (not shown) such as a stereo
player or a tape recorder is inserted into the jack 5. As a result, the signal terminal 5a of the jack
5 and the signal terminal 71 of the plug 7 make electrical contact, and the ground terminal 5b of
the jack 5 and the ground terminal 72 of the plug 7 make electrical contact. Therefore, R (! (! The
IJ 8 is applied to the amplifier 2 through the signal terminal 5 a of the jack 5. The amplification
112 amplifies the R signal and causes the R-side speaker 1 to ring. The plug 8 connected to the
signal output terminal of the other component is inserted into the same -k, jack 6. As a result, the
signal terminal 6a of the jack 6 and the signal terminal 81 of the plug 8 make electrical contact,
and the ground terminal 6b of the jack 6 and the ground terminal 82 of the plug 8 make
electrical contact. Therefore, the signal output from the signal terminal 81 of the plug 8 is
applied to the amplifier 4 through the signal terminal 6 a of the jack 6. The amplifier 4 amplifies
the received signal and makes the L-side speaker 3 ring. By the way, in the above-mentioned
stereo device, when the plug connected to the monaural signal output terminal of the other
component is inserted into any one of the jacks 5 and 6, one of the R-speaker 1 or the L-side
speaker 3 There is no sound from me. In order to eliminate such an identity, in the stereo device
of FIG. 1, a changeover switch 9 is provided between the signal terminal 5a and the signal
terminal 6a. This switch 9 is opened when listening to stereo reproduced audio. Therefore, the R
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signal and the L signal input from the jacks 5 and 6 are individually given to the R side speaker 1
and the L side speaker 3 respectively, and are uttered. On the other hand, when listening to the
audio reproduced in monaural, the changeover switch 9 is closed.
Therefore, the monaural signal input from the jack 5 or 6 is uttered from one of the speakers,
and is supplied to the amplifier of the other speaker through the changeover switch 9 and the
same sound is uttered from the other speaker. As in the stereo device of FIG. 1, the changeover
switch 9 is effective in order to make sounds from both speakers regardless of stereo
reproduction or monaural reproduction. However, the switch 9 has to be switched each time
according to whether the input audio signal is stereo or monaural, and there is a disadvantage
that the operation becomes troublesome. Therefore, the main object of the invention is to w8!
providing an audio signal circuit that can According to the present invention, in summary, the
first jack means for receiving a signal from the plug means connected to and connected to the
first speech means, and the second jack means connected to the second speech means
Connecting the signal terminal of the first jack means and the switch terminal of the second jack
means in the second jack means for receiving a signal supplied from the plug means to be
inserted; When the plug means is inserted into each jack means so as to connect the switch
means of the jack means, the signal from each plug means is applied to the corresponding voice
producing means, and the first and second voice means are provided. When the plug means is
inserted into only one of the jack means, the same signal from the plug means is to be supplied
to both voice producing means. The above-described object and other objects and features of the
present invention will become apparent from the following detailed description given with
reference to the drawings-FIGS. 2 to 4 show an embodiment of the present invention FIG. 2
shows a state in which a plug is not inserted into either of jacks 50 and 60, and FIG. 3 shows a
state in which a plug is inserted into both jacks 50 and 60; The figure shows that only the jack
5o is plugged. First, the configuration of this embodiment will be described with reference to FIG.
For example, a jack 50 for R signal input is provided with a signal terminal 50a and a switch
terminal 50C. The signal terminal 50a is configured to have elasticity, and is in electrical contact
with the switch terminal 50C regularly (when the plug is not inserted). Furthermore, the jack 5 o
is provided with a ground terminal 50 b.
Similarly, for example, a jack 6o for inputting a signal is provided with a signal terminal 6oa, a
switch terminal 60c which is in electrical contact with the signal terminal 60a regularly, and a
ground terminal 60b. The signal terminal 50a described above is connected to the R-side speaker
1 through the amplifier 2 and to the switch terminal 60c of the jack 6 °. The signal terminal 60a
is connected to the L-side speaker 3 via the amplifier 4 and is connected to the switch terminal
50c of the jack 5o. Next, with reference to FIG. 3, the operation in the case of reproducing stereo
sound will be described. In this case, the plug 50 connected to the R signal output terminal of
another component is inserted into the jack 50. Also, a plug 8 connected to the L signal output
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terminal of another component is inserted into the jack 60. In the jack 50, when the plug 7 is
inserted, the signal terminal 50a and the signal terminal 71 of the plug 7 electrically contact. At
this time, the signal terminal 50a is lifted by the signal terminal 71 of the plug 7, and the contact
with the switch terminal 500 is disconnected. Further, the ground terminal 50b of the jack 50
and the ground terminal 72 of the plug 7 are electrically contacted. Similarly, in the jack 60, the
signal terminal 60a and the signal terminal 81 of the plug 8 are electrically contacted, and the
contact state between the signal terminal 60a and the switch terminal 60c is disconnected.
Further, the ground terminal 60b of the jack 6o and the ground terminal 82 of the plug 8 are
electrically contacted. In such a state, the R signal output from the signal terminal 71 of the plug
7 is given to the R111 speaker 1 via the signal terminal 50a of the jack 50 and the amplification
112. Also, the L signal output from the signal terminal 81 of the plug 8 is given to the L-side
speaker 3 via the signal terminal 60 a of the jack 60 and the amplification [14. At this time, the
contact state between the signal terminal 50a and the switch terminal 500 and the contact state
between the signal terminal 60a and the switch terminal 6 (M are disconnected, so the audio
signal input from the jack 50 or 60 is the other speaker It is not given to Therefore, the right side
voice and the left side voice are uttered from the R side speaker 1 and the L side speaker 3
respectively. Next, with reference to FIG. 4, the operation in the case of reproducing monaural
sound will be described. In this case, the plug 10 is inserted into either the jack 50 or the jack 60.
The plug 10 is connected to, for example, a monaural signal output terminal of another
component. For example, when the plug 10 is inserted into the jack 50 as shown in FIG. 4, the
signal terminal 50a of the jack 50 and the signal terminal 101 of the plug 10 make electrical
contact as in the case of FIG. And the contact between the signal terminal 50a and the switch
terminal 50C is disconnected. Further, the ground terminal 50 b of the jack 50 and the ground
terminal 102 of the plug 10 are electrically contacted. On the other hand, in the jack 60, the
signal terminal 60a and the switch terminal 600 are in electrical contact. In such a state, the
monaural signal output from the signal terminal 101 of the plug 10 is supplied to the R-side
speaker 1 through the signal terminal 50aI3 of the jack 50 and the amplifier 2. The monaural
signal output from the signal terminal 101 is the signal terminal 50 a of the jack 50 and the
switch terminal 600. The L-side speaker 3 is supplied via the signal terminal 60 a and the
amplifier 4. Therefore, the same sound from the plug 10 is uttered from the R-side speaker 1 and
the L-side speaker 3. When the plug 10 is inserted only into the jack 60, the same sound is
produced from both speakers in the same manner. Thus, in the embodiments shown in FIGS. 2 to
4, stereo sound or monaural sound can be produced from both speakers without operating the
changeover switch as in the prior art. In the above description, the present invention is applied to
a stereo device. However, the present invention is not limited to the present invention 1 stereo
device. For example, the speakers 1 and 3 may be provided in separate rooms or in the south,
etc., and may be applied to a device that produces a completely separate voice. In this case, if
there is only one audio signal to be input, the same audio is uttered from both speakers. As
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described above, according to the present invention, one signal terminal and two switch
terminals of two jack means having switch terminals are connected to each other, and the other
signal terminal and one switch terminal are connected to each other. When a plug is inserted into
each jack means, an audio signal from the plug is individually applied only to the corresponding
audio output means, and when the plug is inserted into only one jack means, the plug is inserted.
The speech signal from is given to both speech means. Therefore, without operating the
changeover switch as in the prior art, it is possible to cause the sound to be uttered from both of
the sounding means according to the plug insertion situation.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a diagram showing an amplification unit and a speaker unit in a so-called system
component-conventional conventional stereo device.
2 to 4 show an embodiment of the present invention. In the figure, 1 and 3 are speakers, 2 and 4
are amplifiers, 7, 8 and 10 are plugs, 50 and 60 are jacks, 5Qa and 60a are signal terminals, 50b
and 60b are ground terminals, and 50c and 60 are switch terminals. Show. Agent Shino Ono(One other person)
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