JPS59152506A - Signal switching device - Google Patents

Abstract

PURPOSE:To ensure a simple and assured switching operation of a switch at a time of sound recording by using the output of a switch circuit as a sound recording signal output and at the same time using the signal selected by the 1st changeover switch and the output of the 3rd changeover switch which selects another optional signal as a monitor signal output. CONSTITUTION:The changeover switches 11 and 12 interlock with each other, and inputs A, B and C and reproduced inputs A and B are connected to switching positions (a)-(e) of the switch 11 respectively. Then a signal is selected in response to the switching position, and this selected signal is delivered as sound recording outputs A and B via impedance elements 20 and 21. Then a changeover switch 13 connects the positions (a)-(e) corresponding to inputs A-C and reproduced inputs A and B to the selection output of the switch 11 and has a corresponding switching position (f). The signal selected through these switches is delivered as a monitor output. Therefore an input signal is obtained independently of the switch 11 when the monitor signal is set at positions (a)-(e) of the switch 13 and then obtained subordinately to the switch 11 at the position (f).

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a signal switching device for electrical equipment connected to or built in a stereo amplifier or a recorder such as a cassette tape recorder with a radio receiver.

1. Structure of a conventional example and its problems FIG. 1 shows a circuit of a conventional signal switching device. Figure 1 °
, 1 is a recording signal changeover switch that switches the signal of high recording output, 2 is a recording signal changeover switch that changes the signal of recording output B in conjunction with the above recording signal changeover switch 1, and 3
is a monitor signal changeover switch that changes the monitor output signal.

The operation of the signal switching device configured as described above will be explained below. The recording signal changeover switch 1 selects any one output from among the inputs, but only the signal of the reproduction input A is not selected. This is to prevent the input and output signals from forming a loop when the same recorder has a recording monitor function and causing abnormal oscillation when the same recorder's input and output signals are connected to playback input A and recording output A and enter the recording state. .

Similarly, the changeover switch 2 for the recording output B is configured so that the signal from the reproduction manual B is not selected. Further, the monitor signal selector switch 3 is designed to select any one output from each input, and is independent of the switches 1 and 2. Therefore, in conventional devices, it is usual to select a recording signal and then select a monitor signal.

However, in the conventional configuration described above, two switches are always used during recording, namely, the recording signal selection switch 1.

2 and monitor signal changeover switch 3,
The operation was complicated and could easily lead to erroneous operation.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a signal switching device that can easily and reliably perform switch switching operations during recording.

DESCRIPTION OF THE INVENTION The present invention provides an independent first . A third changeover switch and a third changeover switch configured to short-circuit the output to the signal ground when the signals selected by the first changeover switch are the same recorder playback signal or recording monitor signal. It is equipped with a switch circuit having an interlocking second switch, and the output of this sui-nochi circuit is used as a recording signal output, and the output of the first switch is
The output of a third changeover switch that selects an arbitrary signal from among the signal selected by the changeover switch and other signals is used as a monitor signal output. According to this configuration, if the third 1, i7J switch is set to the position where the output signal of the first changeover switch is selected, the recording signal and the monitor signal always match, and the interlocking first
．． Since the recording signal can be selected and the source of the recording signal can be monitored by operating only the second changeover switch, it is possible to realize reliable recording with easy operation and fewer errors.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a circuit diagram of a signal switching device in one embodiment of the present invention. In FIG. 2, 11 is a first changeover switch;
12 is a second changeover switch, and 13 is a third changeover switch. 2Q and 21 are impedance elements, which may be resistors.

The operation of the signal switching device of this embodiment configured as described above will be described below. - First, selector switch 11
and the changeover switch 12 are interlocked, and input person, input B,
Input C, regenerated human power, and regenerated human power B are selector switches 1
1 switching position 'l bl C1d and QJ e, and a signal corresponding to the switching position is selected. The selected signal is outputted as recording output high and recording output B via impedance elements 2Q and 21. The changeover switch 12 is configured to short-circuit the recording output B to the signal ground at positions d and e corresponding to the reproduction input A and reproduction input B, respectively, so that no signal is output. This is to prevent abnormal oscillations in the same recording and reproducing thread as explained in the conventional example. These impedance elements 20 and 21 are set by the changeover switch 12 to prevent IL from affecting the output when the sound output is short-circuited to the signal ground.
・This is Nofa.

Next, the changeover switch 13 switches inputs A to C and reproduction manual power A,
There is a switching position f corresponding to switching positions a - e corresponding to B by connecting the selection output of the changeover switch 11,
A signal selected from these is output as a monitor output. Therefore, the input signal for the monitor signal is obtained independently of the changeover switch 11 when the changeover switch 13 is in the changeover positions a to e, and
6. f, obtained in dependence on the selector switch 11.

According to this embodiment, as shown in ``2'' below, the switching switch No. 1-
By outputting the signal selected by 11 as recording output A and recording output B and connecting it to the switching position f of the changeover switch 13, and directly connecting the input signal to the other positions of the changeover switch 13, the switching A monitor signal dependent on the switch 11 and a monitor signal of an arbitrary input signal independent of the changeover switch 11 can be obtained. Therefore, if the dependent monitor signal, that is, the changeover switch 13, is set to the changeover position f, the sources of the recording output signal and the monitor output signal always match, so it is only necessary to operate the changeover switch 11 (X), and the input selector and the recording It can be used in combination with an input selector. Moreover, if it is necessary to use different sources for the recording output signal and the monitor output signal, the monitor signal can be obtained independently by setting the selector switch 13 to a position other than the switch position f. Can be used with two hairs. Therefore, it is now possible to switch the recording output signal and the monitor output signal together by operating only the interlocking changeover switches 11 and 12, which is convenient and allows you to switch the source during recording! 'You can record without any trouble and with reliable operation.

Note that a buffer amplifier may be inserted before and after the impedance element. This makes it possible to buffer fluctuations in the output level due to impedance fluctuations.

Further, in this embodiment, there are two input/output systems for recording/reproducing, but the number may be one, or three or more systems may be used. In this case, changes can be easily made by simply adding contacts and circuits for each switch. .

Effects of the Invention As described above, the present invention provides the first and third input signals for selecting input signals.
a changeover switch, and a second changeover switch that cuts off the recording output in conjunction with the first changeover switch, and allows any signal to be selected from among the signal selected by the first changeover switch and other signals. By setting the output of the third selector switch that selects the monitor signal to one signal output, the selection of the monitor signal can be made dependent on the recording selector. This has the advantage of eliminating danger, allowing easy operation, reliable recording, and understanding of the recording status.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional signal switching device, and FIG. 2 is a circuit diagram of a signal switching device according to an embodiment of the present invention. 11.12.13...Switch, 20.21.
...Impedance element. Name of agent: Patent attorney Toshio Nakao and 1 other person @1
figure

Claims (1)

[Claims] The first and second terminals have a group of signal input terminals to which input signals from a plurality of signal sources including playback signals from a recorder are applied, and arbitrarily select one signal or one system of signals from the plurality of input signals. 3, and the first selector switch that short-circuits the output to ESOGELAND only when the signal selected by the first selector switch is a playback signal of the same recorder or recording monitor information. The switch circuit includes a switch circuit having a second changeover switch that is linked to the switch circuit, and the same system of recording output signals is obtained through this switch circuit, and the signal selected by the first changeover switch and other signals (input A signal switching device □ characterized in that the output of a third changeover switch that selects an arbitrary signal from among terminals or signal sources is configured to output a monitor signal.