JP2579241Y2 - Signal input / output device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal input / output device for switching between two input signals.

[0002]

2. Description of the Related Art FIG. 5 is a circuit diagram of a conventional signal input / output circuit. FIGS. 5A to 5C show three types of circuits.
Each is a circuit diagram of a monaural / stereo input terminal in an audio device such as a mixer.

[0005] FIG. 5A shows a configuration in which jacks 11 and 12 internally provided with switches 11 a and 12 a are used for the L channel and the R channel to switch between two types of input signals, monaural and stereo.

First, when a plug is inserted only into the L-channel jack 11 and an L-channel signal is input, the switch 11a is opened, and an L-channel signal is output from the L terminal. With the switch 12a kept closed, the L channel signal is distributed to the R terminal and becomes a monaural output. Jack 1
When the plug is inserted into each of the switches 1 and 12, the switches 11a and 12a are both opened, the L channel signal is sent to the L terminal, and the R channel signal is sent to the R terminal to provide a stereo output.

In FIG. 5A, when a plug is inserted only into the R channel jack 12, only the R channel signal is output from the R terminal. In FIG. The channel signal is also distributed to the L terminal, and a monaural output is performed even when a plug is inserted into any of the jacks 11 and 12.

FIG. 5C shows a circuit for selecting a destination of an input signal in an audio device such as a mixer, which is shown in FIG. 5A (or FIG. 5B). This is a circuit for sending signals to, for example, external terminals AUX1 and AUX2 in addition to the terminal and the R terminal. That is, the assignment switch 13 switches between the L and R terminals and the AUX 1 and 2 terminals. The assignment switch 13 is usually provided on an operation panel surface of a mixer or the like.

[0007]

However, when the assignment switch 13 is to be provided in a small mixer or the like, since the operation panel surface is small, there is no space for providing the assignment switch 13 and the assignment switch 13 must be provided. There is a problem that can not be.

The present invention has been made in view of the above problems, and has as its object to provide a signal input circuit for distributing input signals to a plurality of terminals in a small space.

[0009]

The above object is achieved by providing a single set of switching contacts at first and second input sections for inputting two external input signals via respective connecting members. A first switching unit which is switched by the connection member, and which is connected to distribute the input signal to first and second lines of two corresponding systems, The first and second lines and the other lines are connected to at least one of the first and second input units.
A plurality of sets of switching contacts that can be selectively connected to the input section, wherein the switching contacts are operated by inserting / removing the connection member from / to the input section, and a second switching section that switches the line to be connected is provided by the first switching section. Is installed in place of the switching part of
And a distribution path of the input signal to the first and second lines and other lines is selectively switched according to a connection pattern of the connection member to a second input unit. .

[0010]

As described above, at least one of the first and second input sections is connected to the first and second lines and the other lines.
A second switching unit having a plurality of sets of switching contacts that can be selectively connected to the switching unit is provided therein. The second switching unit, wherein said switching contact in response to the insertion and removal is switched lines connected is operated for the input portion of the connecting member, with respect to the first and second lines and other lines 2 distribution channels of the input signal of the system is switched selectively.

That is, in the conventional first switching section provided in the first and second input sections, since a single set of switching contacts is provided, only two lines are provided for two input signals. While the signal cannot be distributed, the input signal can be distributed to another line in addition to the first and second lines by including the second switching unit having a plurality of sets of switching contacts. Become.

That is, by providing the second switching section in the input section, it is not necessary to provide an assignment switch, and the space is small and the apparatus can be downsized.

[0013]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.
FIG. 1 shows a signal input / output device 21 used in, for example, a mixer.
The L-channel plug connection unit 22 as the first input unit and the R-channel plug connection unit 23 as the second input unit are grounded via terminals 22 ₁ and 23 ₁ , respectively. A switch 24 as a second switching unit and a switch 25 as a first switching unit are provided inside the plug connection units 22 and 23. These switches 24, 25
Operates by inserting and removing a plug (see FIG. 2) as a connecting member. The switch 24 has two sets of terminals (switching contact) 24 _2, 24 ₃ and the 24 _3, 24 _4, switch 25 is a set of terminals (switching contact) 25 _1, 25 ₂
Having.

One end 24 of the switch 24 on the L channel side
a is connected to a volume 26 composed of a sliding resistor 26a via a terminal 24 ₁ and a terminal 25 ₁ of a switch 25 on the R channel side, and the other end of the sliding resistor 26a is grounded. Also, the sliding portion 26a ₁ of the sliding resistor 26a ₁
Are connected via a resistor 27 to an output terminal 28 of an L channel line as a first line.

The other end 24 of the switch 24 between the L channels
b are connected (the volume 26 configuration) sliding resistance R channel side 26b sliding portion 26b ₁ through the terminal 24 _3. Further, one contact at the other end 24b side of the switch 24 of the L-channel side terminal 24 ₂ than the resistance 2
Is connected to the output terminal 30 of the Q external output line via the 9, second the other contact via a resistor 31 from the terminal 24 ₄
Is connected to the output terminal 32 of the R channel line. The switch 25 on the R channel side is
Terminal 25 ₂ is connected to one end of the sliding resistance 26b from the other end of the sliding resistance 26b is grounded.

The switch 24 has one end 24a and the other end 2a.
24c interposed between 4b is an insulator.

FIG. 2 is a view for explaining the contact operation of FIG. 2A and 2B show the switch 24.
2C and 2D show the operation of the switch 25.
This is the contact operation.

[0018] 2 (A) is a state where the plug 33a is not inserted into the plug connection 22, the other end 24b of the switch 24 is contact with the terminals 24 ₂ side, terminals 2
The 4 ₄ side is a non-contact state. When the plug 33a is inserted into the plug connection 22 as shown in FIG. 2 (B), the other end 24b of the switch 24 is rendered non-contact state with the terminals 24 ₂ side, the contact with the terminals 24 ₄ side .

Further, FIG. 2 (C) shows a state in which no plug 33b is inserted into the plug connection 23, the terminal 25 ₂ of the switch 25 is contact with the terminals 25 ₁ side, FIG. 2 ( plug 33b as shown in D) is a non-contact state and the terminal 25 ₁ side be inserted.

FIG. 3 is a diagram for explaining the signal flow in FIG. FIG. 3A illustrates the plug connection unit 22.
A case where plugged 33a only, the L channel signal, sliding resistance 26a first from the terminal 24 ₁ is output from the output terminal 28 of the L-channel line via a resistor 27.

The L channel signal is supplied to terminals 25 ₁ and 25 2 of the switch 25 on the R channel side from the terminal 24 _1.
5 through sliding resistance 26b via _two further terminals 24 _third switch 24 in the L-channel side, of the R-channel line through the resistor 31 via a 24 ₄ output terminal 32
Output.

That is, the L channel signal is output to the L channel line and the R channel line and becomes a monaural output.

Next, FIG. 3B shows a case where the output is made only from the Q line when the plug 33b is inserted only into the plug connection portion 23 of the R channel. That is, the R (Q) channel signal is supplied to the terminal 2 of the switch 25.
As the sliding resistance 26b via the 5 _2, through the resistor 29 through the terminal 24 _3, 24 ₂ of the switch 24 of the L-channel side is outputted from the output terminal 30 of the Q-line.

FIG. 3C shows that the plugs 33a and 33a are connected to both the L and R channel plug connections 22 and 23.
b is inserted. First, L-channel signal through the sliding resistance 26a via the terminal 24 ₁ of the switch 24, is output from the output terminal 28 of the L-channel line via a resistor 27. Also, R-channel signal through the sliding resistance 26b through the terminal 25 ₂ of the switch 25, is output from the output terminal 32 of the R-channel line through the resistor 31 through the terminal 24 _3, 24 ₄ of the switch 24 .

That is, the L channel signal is output from the output terminal 28 of the L channel line, and the R channel signal is output from the output terminal 32 of the R channel line and output in stereo.

It should be noted that the plug connection section 22 is connected to R (MONO)
For the channel, the plug connection may be for the L (Q) channel.

FIG. 4 is a circuit diagram of another embodiment of the present invention. FIG. 4 (A), which was provided with a switch 25 _A having a plurality of sets of switching contacts similar to the switch 24 to the plug connection 23 of the R-channel side in FIG. 1, Briefly, the switches 22 and 23 The terminals 22 ₁ and 23 ₁ are connected to one ends of the sliding resistors 26a and 26b and are grounded. As described above, one end 2 of the switch 24
An insulator 24c is interposed between 4a and the other end 24b.

[0028] From terminal 24 ₁ of the switch 24 is connected to the other end of the sliding resistance 26a, it is connected to the switch 25 _A of the terminal 25 _A3 from the sliding portion 26a _1. An output terminal of the external line from the terminal 24 ₂ via the resistor 29 (AUX2) 3
0 (Q line in FIG. 1). From the terminal 24 ₃ is connected to the sliding portion 26b ₁ of the sliding resistance 26b, the other end of the sliding resistance 26b is connected to the terminal 25 _A1. Then, connected to the output terminal 32 of the R-channel line via a resistor 31 from the terminal 24 _4.

On the other hand, the output terminal 35 of the external line (AUX1) is connected via the resistor 34 from the terminal 25 _{A2 of the} switch 25.
And from the terminal 25 _A4 to the output terminal 28 of the L channel line via the resistor 27.

In such a signal input device 21, the plug connection section 22 is connected to the L channel signal (external line AUX1).
The plug connection unit 23 is for an R channel signal (external line AUX2). That is,
When the plug 33a is inserted only into the plug connection unit 22, the L channel signal is output from the output terminal 35 of the external line AUX1, and the plug 3 is connected only to the plug connection unit 23.
When 3b is inserted, the R channel signal is output from the output terminal 30 of the external line AUX2. And
Plugs 33a, 33b are connected to both plug connection portions 22, 23.
Is inserted, the L and R channel signals are output from the output terminal 28 of the L channel line and the output terminal 32 of the R channel line, respectively, to provide a stereo output.

FIG. 4B shows the terminal 24 ₂ of the switch 24 and the terminal 24 _{A2 of the} switch 25 in FIG.
Are short-circuited. The switch 25
However, an insulator 25c is interposed between one end 25a and the other end 25b.
Be present.

According to this, when the plug 33a is inserted only into the plug connection part 22 of the L channel, or when the R
When the plug 33b is inserted only into the plug connection part 23 of the channel, the signal of the L channel or the R channel is output from the output terminal 30 of the external line AUX.

When the plugs 33a and 33b are inserted into both of the plug connectors 22 and 23, the L channel signal is output from the L output terminal 28 and the R channel signal is output from the R output terminal 32. Output terminal 2
It is a stereo output between 8, 32.

As described above, since the assigning function can be provided without providing an expensive assigning switch as in the related art, the input terminals can be effectively used, and the equipment can be reduced in cost and space. The size can be reduced.

The above embodiment has been described with reference to a case where the present invention is applied to a mixer. However, the present invention is not limited to this, and can be applied to a device for distributing two input signals to more output terminals. is there.

[0036]

As described above, according to the present invention, at least one of the first and second input units is provided with the first and second input units .
It has a plurality of sets of switching contacts that can be selectively connected to a line and another line, and the switching contacts are operated according to the insertion and removal of the connecting member to switch the line to be connected, and the connection pattern of the connecting member By internally providing a second switching unit for selectively switching the distribution path according to
It is possible to distributable to the output line of the above is this input signal of the system, compact equipment and is able to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a diagram for explaining a contact operation of FIG. 1;

FIG. 3 is a diagram for explaining a signal flow in FIG. 1;

FIG. 4 is a circuit diagram of another embodiment of the present invention.

FIG. 5 is a circuit diagram of a conventional signal input / output circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Signal input / output device 22, 23 Plug connection part 24, 25 Switch 26 Volume 26a, 26b Sliding resistance 27, 29, 31, 34 Resistance 28, 30, 32, 35 Output terminal 33a, 33b Plug

Claims (1)

(57) [Scope of request for utility model registration] 1. A first and a second input unit for inputting two external input signals via respective connection members,
First switching units each having a single set of switching contacts and switched by the connecting members are respectively provided therein, and are connected so as to distribute the input signal to corresponding two first and second lines. A signal input / output device, wherein at least one of the first and second input units includes:
A plurality of sets of switching contacts selectively connectable to the first and second lines and other lines , wherein the switching contacts are operated by inserting / removing the connection member from / to the input portion, and a line to be connected is provided. A second switching unit to be switched is internally provided instead of the first switching unit, and the first and second lines are switched according to a connection pattern of the connection member to the first and second input units. A signal input / output device configured to selectively switch a distribution path of the input signal to another line.