JPH0547911B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a recording signal switching device for an audio amplifier of a recorder (hereinafter referred to as a tape recorder), and in particular, to a recording signal switching device for an audio amplifier of a recorder (hereinafter referred to as a tape recorder), and in particular, a device that is capable of connecting multiple systems of recording/playback devices. It is.

(Constitution of Conventional Example and its Problems) A conventional recording signal switching device will be explained based on FIG. 1. 10 is a signal source input changeover switch, and input 1, input 2, and input 3 are equivalent to, for example, a record input, a tuner input, and an auxiliary input. Further, in the figure, 20 and 30 are both switches that are interlocked with each other, and at the position a, the playback signal of the tape recorder 10a is switched to the tape recorder 2.
The recording signal is set to 0a, and nothing is connected to recording output 1. That is, at this position, dubbing is performed from the tape recorder 10a to the tape recorder 20a. The reason why nothing is connected to the recording output 1 is to prevent the recording signal from being inputted again from the reproduction input 1 and causing an abnormal state such as oscillation if the tape recorder 10a has a recording monitor function. Next, switch 2
When 0 and 30 are set to position b, the signal selected by the switch 10 is output to both recording output 1 and recording output 2, allowing recording of records or tuners, for example. Interlocking switch 20,
When the tape recorder 30 is placed in the position c, dubbing from the tape recorder 20a to the tape recorder 10a becomes possible as in the position a.
However, the above configuration has a problem in that signals can only be switched between two systems of tape recorders.

(Objective of the invention) The present invention solves the above-mentioned conventional drawbacks.
It is an object of the present invention to provide a signal switching device capable of switching signals of tape recorders of more than one system.

(Structure of the Invention) The present invention includes a first changeover switch that selects one of input signals including playback signals of a plurality of recorders;
a recording output terminal for taking out respective recording outputs from the selection terminal of the first selector switch via a plurality of impedance elements; and a second recording output terminal for selecting one of the recording output terminals and shorting it to a signal ground. 2 changeover switches, the first changeover switch and the second changeover switch are interlocked, and the signal selected by the first changeover switch is a playback signal of one recorder. In some cases, the second changeover switch is a signal switching device characterized in that the recording output of the one recorder is selected, and the signal of many tape recorders can be switched with a simple configuration. It is something.

(Description of Embodiments) Embodiments of the present invention will be described based on FIGS. 2 and 3.

FIG. 2 shows a circuit diagram of a signal switching device according to a first embodiment of the present invention. 11 is a signal source input changeover switch, 12 is a switch for selecting one of output 1 and playback inputs 1 to 3 of the tape recorder, and 13 is a switch for shorting one of the recording output signals to signal ground. and
Switches 12 and 13 are interlocked. Also 14,1
5 and 16 are impedance elements, respectively.

The operation of the signal switching device of this embodiment configured as described above will be explained below.

First, the switch 11 is used to change the signal source input (tuner, record, etc.), and then the switch 12 is used to select any one of the signal source and the reproduction inputs 1 to 3 of the tape recorder. The output selected by this is the impedance element 14, 15 and 16.
At the same time, the switch 13 short-circuits the recording output signal to ground. switch 13
are interlocked with the switch 12, and the respective switching positions shown in FIG. 2 are b. That is, playback input 1 of the tape recorder is selected by the switch 12,
It is output to recording outputs 2 and 3 via impedance elements 15 and 16, respectively, but recording output 1
Since it is short-circuited to ground by the switch 13, the output becomes 0, which prevents abnormalities such as oscillation as described in the conventional example. The impedance elements 14, 15, and 16 are used to prevent other recording outputs from being affected even if one of the recording outputs is short-circuited to ground, and generally resistors are used.

As described above, according to this embodiment, even when three systems of tape recorders are connected, the recording and playback signals of the same tape recorder are cyclically amplified by the second changeover switch that is linked to the input signal switching. This makes it possible to prevent abnormalities such as oscillation.

FIG. 3 is a circuit diagram of a signal switching device showing a second embodiment. 14 to 17 are impedance elements, and the entire circuit has the same structure as that shown in FIG. 2. The configuration of the device shown in Figure 3 is the second
The difference from the configuration of the device shown in the figure is that the input selector switch 18 is shared between the tape recorder and other inputs, and the same switch is used to switch between them.
The point is that the tape recorder can be switched between up to four systems. The operation of the signal switching device of the second embodiment configured in this manner will be described below. As is clear from the figure, the signal input and the playback input of the tape recorder are arbitrarily selected by the switch 18, and the impedance elements 14, 15, 1
The signals are output to recording outputs 1, 2, 3, and 4 via signals 6 and 17. However, when the switch 18 is a tape recorder, that is, when it is in the position of the output terminals d, e, f, and g, the recording output of the same system is short-circuited to ground by the interlocking switch 19 and becomes 0, similar to the first embodiment. It is designed to prevent abnormal conditions.

As described above, according to this embodiment, by using a single input switch, the tape recorder and other inputs can be switched all at once, which simplifies the circuit, is economical, and is easy to operate. It is also convenient.

Note that in the first and second embodiments, the switch is not limited to a rotary switch, but may also be a switch or a switch circuit capable of switching, such as an interlocking push switch.

Although not shown, it goes without saying that an amplifier may be inserted before or after the impedance element.

(Effects of the Invention) The present invention is a signal switching device comprising a first switching switch and a second switching switch configured to short-circuit recording output signals of the same system to the ground in conjunction with the first switching switch. It is possible to connect a tape recorder and perform switching operations or dubbing from one tape to another, and furthermore, the operation is simplified.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional signal switching device, FIG. 2 is a circuit diagram of a signal switching device in a first embodiment of the present invention, and FIG. 3 is a circuit diagram of the same device in a second embodiment of the present invention. be. 10, 11...Signal source input changeover switch, 2
0, 30...Switch, 12, 13, 18, 19
...Switch, 14, 15, 16, 17... Impedance element.

Claims (1)

[Claims] 1 a first changeover switch that selects one input signal from a plurality of input signals including playback signals of recorders;
a recording output terminal that takes out each recording output from the selection terminal of the switching switch via a plurality of impedance elements; and a second switching switch that selects one of the recording output terminals and short-circuits it to the signal ground. The first changeover switch and the second changeover switch are interlocked, and
When the signal selected by the first changeover switch is a reproduction signal of one recorder, the second
A signal switching device characterized in that the changeover switch selects the recording output of the one recorder.