JPH021682Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal switching device for source switching to an amplifier and for performing recording/reproducing operations.

A conventional signal switching device was constructed as shown in FIG. 1, for example. In Figure 1, SW ₁ is the function changeover switch, SW ₂ is the tape changeover switch, AUX, TUNER, PHONO, TAPE A,
TAPE B is an input terminal. Input terminal AUX,
TUNER, PHONO, TAPE A, and TAPE B each have an AUX signal, a playback signal from the tuner,
A playback signal from a record player, a playback signal from tape recorder A, and a playback signal from tape recorder B are supplied, respectively. EQ is input terminal
This is an equalizer amplifier that amplifies and equalizes the reproduced signal supplied to the PHONO. REC OUT(A),
REC OUT(B) is an output terminal for recording signals to tape recorders A and B. The fixed contacts 1 to 5 of the function changeover switch SW ₁ are connected to PHONO, TAPE A, and TAPE B through the input terminals AUX, TUNER, and equalizer amplifier EQ via the transmission line, and the movable contacts are connected to the mode selector MS.
is connected to the input terminal of the preamplifier PA via. Tape changeover switches SW _2-1 and SW _2-2 operate in conjunction. Tape changeover switch SW _2-1 ,
Fixed contacts 1 to 3 of SW _2-2 are connected to the input terminal AUX, the input terminal TUNER, and the output terminal of the equalizer amplifier EQ via transmission lines, respectively. Further, the fixed contact 6 of the tape changeover switch SW _2-1 is connected to the input terminal TAPE B via the transmission line, and the fixed contact 5 of the tape changeover switch SW _2-2 is connected to the input terminal TAPE A via the transmission line. The movable contacts of changeover switches SW _2-1 and SW _2-2 are output terminals.
Connected to REC OUT(A) and REC OUT(B).
In addition, Fig. 2 a and b show the function changeover switch SW ₁ and the tape changeover switch SW _2-1 ,
The fixed contact arrangement of SW _2-2 is shown.

However, when using the conventional signal switching device as described above, the output terminals REC OUT (A) and REC OUT (B) are connected to the input terminals AUX, TUNER, and TAPE, respectively.
Since the output terminals of A, TAPE B, and the equalizer amplifier EQ are directly connected via the tape changeover switches SW _2-1 and SW _2-2 , the output terminals REC OUT(A),
There was a drawback that signal processing such as tone control was not performed on the signal supplied to REC OUT (B).

Also, since the load conditions for the input signal are different between the state in which the fixed contacts of tape changeover switches SW _2-1 and SW _2-2 are selected and the state in which the other fixed contacts are selected, AUX, TUNER,
Connect a low impedance device to the input terminals such as ..., or connect the output terminals REC OUT(A),
A high impedance device must be connected to REC OUT (B). Therefore, there was a drawback that impedance matching was impossible. For this reason, the above-mentioned signal switching device has a drawback that it cannot be used for switching video signals.

The present invention has been developed in consideration of the above, and eliminates the above drawbacks, allows signal correction using tone control, etc., and allows monitoring of other input signals during dubbing, as well as tone control equipment, etc. It is an object of the present invention to provide a signal switching device which also makes it possible to switch video signals by using an impedance buffer instead.

This purpose, according to the present invention, includes a signal processing circuit;
A terminal in which reproduction signals from a plurality of signal reproduction devices are each supplied to one common terminal, an output signal from a signal processing circuit is supplied to the other common terminal, and which contacts one common terminal at the movable piece position before switching. and a terminal that contacts the other common terminal at the movable piece position after switching are connected to the first group of switches, and playback signals from a plurality of signal recording and playback devices are each supplied to one common terminal, and signal processing is performed. An output signal of the circuit is supplied to the other common terminal, and a terminal that contacts one common terminal at the movable piece position before switching is connected to a terminal that contacts the other common terminal at the movable piece position after switching, and a second group of switches in which a signal via a terminal that contacts the other common terminal at the position of the movable piece before switching is supplied as a recording signal to a corresponding signal recording/reproducing device; During the switch, the position of the movable piece of only one switch operated is changed, and the signal via the terminal that contacts one common terminal at the position of the movable piece after switching of the first and second group of switches is a signal. The double-pole double-throw switch group that is input to the processing circuit, the output from the signal processing circuit, and each output via the terminal connected to one common terminal at the movable side position before switching of each switch composing the switch group. This is achieved by providing a selection switch that selectively outputs one output of the output.

The present invention will be explained below with reference to examples.

FIG. 3 is a connection diagram showing an embodiment of the present invention.

SW _3-1 , SW _3-2 , SW _3-3 , and SW _3-4 are push button switches that operate in conjunction so that when the switching operation is performed, one of the switches slides in the V direction and is switched. This is a selection switch that selects whether or not to process the input signal and output it.

Common contact c _-1 for selection switch SW _3-1 to SW _3-4
are connected to the input terminals X, Y, A, and B via transmission lines, and each contact b _-1 is connected to the signal processing circuit CU.
is connected to the input terminal of the terminal via a transmission line.

Here, a signal reproducing device is connected to the input terminals X, Y, A, and B. In this embodiment, a record player, a tuner, a tape recorder A, and a tape recorder B are connected to input terminals X, Y, A, and B, respectively, and playback signals from each are supplied. Further, the signal processing circuit CU is, for example, a tone control circuit or a tone control circuit such as a graphic equalizer. Each contact a _-1 of selection switches SW _3-1 to SW _3-4 is connected to fixed contacts X ₁ , Y ₁ , A ₁ , and B ₁ of function changeover switch SW ₄ via a transmission line, respectively, and its movable contacts is connected to the input terminal of the preamplifier PA.
The output terminal of the signal processing circuit CU is connected to the fixed contact of function changeover switch SW ₄ via a transmission line.
SOURCE and selection switch SW _3-1 ~ SW _3-4
are respectively connected to each common contact c _-2 . On the other hand, each contact a _-2 of selection switches SW _3-1 and SW _3-2 is an output terminal for tape recorders B and A, respectively.
It is connected to REC OUT(B) and REC OUT(A), and each contact b _-2 of the selection switches SW _3-1 to _{SW 3-4} is connected to each contact a _-1 .

Next, Figure 4 a and b are selection switches SW _3-1.
An example of the arrangement of push buttons of SW _3-4 and the arrangement of fixed contacts of function changeover switch SW ₄ is shown.

When the selection switches SW _3-1 to SW _3-4 are all set to the U side as shown in Fig. 3, _{the fixed contacts X 1 ,} Y ₁ ,
Each input playback signal from input terminals X, Y, A, and B is output as is to A 1 and B ₁ , and when one of them is selected by switching function switch SW _{4 ,} the selected signal is output as is. The signal is sent to the output terminal OUT via the preamplifier PA.

Therefore, the reproduced signals supplied to the input terminals X, Y, A, and B can be amplified and listened to.

Press one of the selection switches SW _3-1 to SW _3-4 ,
Move the movable piece in the V direction to connect the input terminals X, Y,
When one of A and B is selected, the contact c _-1 of the selected selection switch SW _3-1 ,... or SW _3-4
The reproduced signal from the selected input terminal X, Y, A or B via b _-1 is guided to the signal processing circuit CU and subjected to signal processing. The playback signal processed by the signal processing circuit CU is sent to the selected selection switch.
It is led to the corresponding fixed contact _{X 1 ,} Y ₁ , A ₁ or B ₁ of the function changeover switch SW ₄ through the contacts c _-2 , b _-2 of SW 3-1 , ... or SW _3-4 , and
It is led directly from the output terminal of the signal processing circuit CU to the fixed contact SOURCE of the function changeover switch _SW4 . Therefore, either the fixed contact SOURCE is selected by function changeover switch SW ₄ , or
Or, if fixed contact X ₁ , Y 1 , A ₁ or B 1 corresponding to input terminal X, Y, _A or B selected by selection switch SW _3-1 ,... or SW _3-4 is selected, _select The output obtained by signal processing the reproduced signal supplied to the input terminal X, Y, A or B selected by the switch SW _3-1 ,... or SW _3-4 is amplified by the amplifier PA and guided to the output terminal OUT. become.
Also, fixed contacts _{X 1 ,} Y ₁ , _{A 1 or}
When B ₁ is selected by function selector switch SW ₄ , selector switch SW _3-1 ,... or
Input terminals X, Y, not selected by SW _3-4
The reproduced signal from A or B is directly amplified by the amplifier PA and guided to the output terminal OUT.
Therefore, by selecting function changeover switch SW ₄ and selection switches SW _3-1 to SW _3-4 ,
It is possible to amplify and listen to the signal obtained by signal processing the reproduced signal from the selected input terminal or the reproduced signal from unselected input terminals.

On the other hand, input terminal B is selected by selection switch SW _3-1 .
When you select , the playback signal supplied to input terminal B is processed by the signal processing circuit CU,
It is supplied to the output terminal REC OUT(A) via the common contact c _-2 and contact a _-2 of the selection switch SW _3-2 . Also, when input terminal A is selected by selection switch SW _3-2 , the playback signal supplied to input terminal A is similarly processed by the signal processing circuit CU and sent to output terminal REC OUT (B). Supplied. Therefore, during dubbing, the signal processed by the signal processing circuit CU can be recorded. Furthermore, during dubbing, it is possible to monitor not only the reproduced signal subjected to signal processing to be copied, but also the copied reproduced signal or other reproduced signals.

In addition, input terminal Y is selected by selection switch SW _3-3 .
When you select , the playback signal supplied to input terminal Y is processed by the signal processing circuit CU, and
Output terminals REC OUT(B) and REC are connected via common contact c _-2 and contact a _-2 of selection switches SW _3-1 and SW _3-2 .
Supplied to OUT(A). Also selection switch SW _3-4
The same applies when input terminal X is selected by . Therefore, the output terminal REC OUT(A), REC
The playback signal supplied to OUT(B) is sent to the signal processing circuit CU
This is a signal processed by . In this case as well, it is possible to monitor not only the signal-processed reproduced signal to be copied, but also the copied reproduced signal or other reproduced signals.

Further, the signal processing circuit CU may be provided with a default switch, for example, to select whether or not to insert the signal into the signal switching device.

In addition, when using an embodiment of the present invention by inserting it into a video signal line, the signal processing circuit CU may be an impedance buffer, and the impedance matching is performed by the impedance buffer, and the video signal is It can also be used for switching.

Furthermore, the same configuration can be used even when the number of input terminals is increased, and the selection switch can also be configured with a rotary switch.

As explained above, according to the present invention, the drawbacks of conventional signal switching devices are solved, and during dubbing, the recorded signal is processed by the signal processing circuit, such as signal correction, and then supplied to the recording/playback device. At the same time, it is possible to monitor other playback signals, signal-processed playback signals to be copied, or copied playback signals supplied to one common terminal of each switch.

Furthermore, an impedance buffer can be used in the signal processing circuit, and can also be used to switch video signals.

[Brief explanation of drawings]

FIG. 1 is a connection diagram of a conventional signal switching device. 2a and 2b are contact layout diagrams of a function changeover switch and a tape changeover switch of the signal changeover device shown in FIG. 1; FIG. FIG. 3 is a connection diagram showing an embodiment of the present invention. 4a and 4b are arrangement diagrams of a selection switch and a contact arrangement diagram of a function switch in one embodiment of the present invention shown in FIG. 3; FIG. X, Y, A and B……input terminal, OUT……
Output terminals, REC OUT(A) and REC OUT(B)…
…Output terminal for recording playback signal, SW _3-1 to SW _3-4 …
...Selection switch, SW ₄ ...Function selector switch, CU...Signal processing circuit, PA...Preamplifier.

Claims (1)

[Claims for Utility Model Registration] A signal processing circuit and reproduction signals from a plurality of signal reproduction devices are each supplied to one common terminal, and an output signal of the signal processing circuit is supplied to the other common terminal, and before switching a first group of switches in which a terminal that contacts one common terminal in the movable piece position and a terminal that contacts the other common terminal in the switched movable piece position are connected;
A terminal in which reproduction signals from a plurality of signal recording and reproducing devices are respectively supplied to one common terminal, an output signal of the signal processing circuit is supplied to the other common terminal, and which contacts one common terminal at the movable piece position before switching. and the terminal that contacts the other common terminal at the movable piece position after switching are connected, and the signal via the terminal that contacts the other common terminal at the movable piece position before switching is transmitted to the corresponding signal recording and reproducing device. and a second group of switches that are supplied as recording signals,
Switch operation was performed during the first and second group switches.
A double pole in which the movable piece position of only two switches is changed, and a signal is input to the signal processing circuit through a terminal that contacts one common terminal at the movable piece position after switching of the first and second groups of switches. Select one output from the double throw switch group, the output from the signal processing circuit, and each output via the terminal that contacts one common terminal at the position of the movable part before switching of each switch composing the switch group. A signal switching device comprising a selection switch.