JPH03923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio signal switching device for a device that reproduces a plurality of audio input signals, respectively.

[Prior art]

Normally, this type of audio signal switching device connects multiple input terminals to the switching contacts of a selector switch.
The common contact of the selector switch is connected to the output terminal. In conventional devices, a variable resistor that adjusts the output volume is installed between the common contact of the selector switch and the output terminal, and according to this, when the level of the audio input signal applied to each input terminal is different, The problem was that the volume had to be adjusted every time the selector switch was switched. On the other hand, there is a selector switch in which a variable resistor is installed in front of each switching contact. According to this, the volume can be set for each level of each audio input signal, and the volume is adjusted each time the selector switch is switched. There will be no need to do so.

[Problem that the invention seeks to solve]

However, in the second prior art, the large number of operation knobs provided on the operation panel makes it unsightly, and there are problems in that it may cause erroneous operations such as operating an unrelated variable resistor. The present invention attempts to solve the above problems in the second prior art by reducing the number of operation knobs provided on the operation panel to one.

[Means for solving problems]

For this reason, the present invention provides, as shown in FIG. 1, an audio signal switching device shown in the second prior art,
Each of the variable resistors 13a to 13c is linked to one operation knob via clutches 14a to 14c, respectively, and is connected to an output terminal 16 by a selector switch S1.
Only the clutch corresponding to the variable resistor connected to is coupled, and only the variable resistor is connected to the operating knob 18.
It is configured such that it can be adjusted by.

[Effect]

When the selector switch S1 of the present invention is switched to the position of the switching contact 1b, for example, the clutch 14b corresponding to the variable resistor 13b connected to the output terminal 16 is automatically coupled, and the other clutches 14a and 14c are automatically coupled. be canceled. Therefore, the variable resistor 13b is adjusted in conjunction with the operation knob 18, but the other variable resistors 13
a and 13c are not adjusted and remain in their original states. Even when the selector switch S1 is switched to another position, the variable resistor corresponding to the switched position is adjusted by the operation knob 18, but the other variable resistors are not adjusted.

〔Effect of the invention〕

In the present invention, variable resistors are provided in front of each switching contact of the selector switch S1, and although the volume can be adjusted for each audio input signal, there is only one operation knob, and moreover, the selector switch S1 has only one operating knob. Since only the variable resistor corresponding to the switching position is linked to the same operation knob, the operation panel is simplified and the appearance is improved, and the risk of erroneous operation of operating an unrelated variable resistor is completely eliminated. It can be resolved.

〔Example〕

Figure 1 shows three input terminals 10a, 10b, 10
An example provided with c. 1st to 3rd input terminal 1
0a, 10b, 10c are variable resistors 13, respectively.
a, 13b, 13c, and the other end of each variable resistor 13a, 13b, 13c is grounded. In addition, the first to third input terminals 10a, 10
b, 10c are mixing resistors 11a, 11b, 1
1c, and is connected to one end of the variable resistor 13a via the amplifier 12.
The other end of d is grounded. Each variable resistor 13a
~13d sliders 131a, 131b, 131
The outputs from c and 131d are respectively connected to the switching contacts 1a, 1b, 1c and 1d of the selector switch S1, and the common contact of the selector switch S1 is connected to the output terminal 16 via the sound quality adjustment device 15. Connected to a speaker (not shown).

Each of the variable resistors 13a to 13d is linked to an operating knob 18 rotatably provided on an operating panel 19 via electromagnetic clutches 14a, 14b, 14c, and 14d, respectively. Each electromagnetic clutch 14a
-14d are switching contacts 2a, 14d of the second selector switch S1, which are interlocked with the selector switch S1, respectively.
2b, 2c, 2d, and the common contact of the second selector switch S2 is connected to each electromagnetic clutch 14a to 14a.
It is connected to a battery 17 that excites the 4d. Thus, output terminal 16 is selected by selector switch S1.
Only the electromagnetic clutch (electromagnetic clutch 14d in the above figure) corresponding to the variable resistor (variable resistor 13d in the state shown in FIG. 1) connected to the variable resistor (in the state shown in FIG. 131d) is the only operating knob 18
The contact position to the resistor moves in conjunction with the other sliders (sliders 131a and 13 in the same example).
1b and 131c), the contact position does not change even if the operating knob 18 is rotated.

Next, the operation of this embodiment will be explained.

Audio input signals from a player, microphone, tape recorder, etc. are provided to the first to third input terminals 10a to 10c, respectively. First, the selector switch S1 and the second selector switch S2, which are interlocked with each other, are set to the switching contacts 1a and 2a, respectively, and the audio input signal from the first input terminal 10a is selected and sent to the output terminal 16, and the electromagnetic clutch 1
The variable resistor 1 is controlled by the operation knob 18 via the
Adjust 3a to get the appropriate volume. As mentioned above,
Even after this adjustment, the other variable resistors 13a to 13
d never changes. Next, the selector switch S1 and the second selector switch S2 are sequentially switched, and the variable resistors 13b and 13 are switched in the same manner as above.
By adjusting d, the volume of the audio input signals from the input terminals 10b and 10c and the mixed signal from the amplifier 12 is adjusted to an appropriate value.

After making this adjustment, selector switch S1
By switching the , the appropriate volume can be immediately obtained for each audio input signal and mixed signal. That is, the selector switch S1 is switched between the switching contacts 1a to 1c.
If the selector switch S1 is set to the switching contact position 1d, the audio input signals applied to the input terminals 10a to 10c are mixed. will be played.

In addition, in the above embodiment, each input terminal 10
Immediately after a to 10c, mixing resistors 11a to 1
1c, the mixed signals were taken out through sliders 131a to 131c and switching contacts 1a to 1c.
The mixed signal may be taken out through a mixing resistor between the two.

Furthermore, instead of being electromagnetic clutches, the clutches 14a to 14d may be mechanically interlocked with the selector switch S1 to release the coupling.

In addition, only the variable resistors 13a to 13c are linked to the operation knob 18 via the clutch,
The variable resistor 13d may be operated by a separate operating knob.

Note that the circuit shown in FIG. 2 is provided between the amplifier 12 and the variable resistor 13d, and the two tape recorders 21,
22, the following functions become possible. In addition, in the following explanation, selector switch S
1 shall always be placed at the position of the switching contact 1d.

(1) Playback from tape recorders 21, 22 If the tape changeover switch S6 is set to the switching contact 6r position, the audio signal from the tape recorder 21 will be played back, and if it is set to the switching contact 6s position, the audio signal from the tape recorder 22 will be played back. be done.

(2) Recording to tape recorders 21 and 22 First to third switching switches S3,
S4 and S5 are at the positions of switching contacts 3q, 4q, and 5q, and tape switching switch S6 is set at switching contact 6r.
, the audio input signals to the input terminals 10a to 10c are mixed and output to the tape recorder 21.
At the same time as being recorded, it is monitored through a speaker (not shown) connected to the output terminal 16. By reversing the positions of the switches S3 to S6, the mixed audio signal on the tape recorder 22 is simultaneously recorded and monitored.

(3) Re-recording between the tape recorders 21 and 22 If the first to third switching switches S3 to S5 are set to the switching contacts 3p to 5p, and the tape switching switch S6 is set to the switching contact 6s, the tape recorder 21 The re-recording to the tape recorder 22 is simultaneously monitored. By reversing the positions of the switches S3 to S6, re-recording from the tape recorder 22 to the tape recorder 21 is simultaneously monitored.

(4) When the tape recorders 21 and 22 are not used If the first to third switching switches S3 to S5 are set to the switching contacts 3p to 5p, and the tape switching switch S6 is set to the switching contact 6r, the state shown in Fig. 1 is obtained. The audio input signals applied to the input terminals 10a to 10c are mixed and reproduced. The same effect can be obtained even if the positions of the switches S3 to S6 are reversed.

Note that the circuit diagrams in Figures 1 and 2 show the principle operation, and in actual implementation, emitter follower circuits and related associated circuits will be installed at the locations where each signal is mixed. Well-known configurations shall be added as necessary.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment of the present invention, with FIG. 1 being an overall circuit diagram and FIG. 2 being a circuit diagram when a tape recorder is provided. Explanation of symbols, S1...Selector switch, 1
a, 1b, 1c, 1d...Switching contact, 10a, 1
0b, 10c...input terminal, 11a, 11b, 1
1c...Mixing resistor, 13a, 13b, 13
c, 13d...variable resistor, 14a, 14b, 1
4c, 14d...clutch, 16...output terminal,
18...Operation knob.

Claims (1)

[Claims] 1. A selector switch having a plurality of variable resistors each connected to a plurality of input terminals, a switching contact to which the output of each variable resistor is connected, and an output terminal connected to a common contact of the selector switch. In the audio signal switching device equipped with,
Each variable resistor is linked to one operating knob via a clutch, and only the clutch corresponding to the variable resistor connected to the output terminal is connected by the selector switch, so that only the variable resistor is linked by the operating knob. An audio signal switching device characterized in that it is configured to be adjustable.