JPH0879636A - Signal input terminal with switch - Google Patents

Abstract

PURPOSE: To integrate an S-video signal input terminal and a video input terminal, to automatically turn off a signal from the video input terminal when the S-video signal input terminal is connected and to generate a control signal switching a signal processing circuit. CONSTITUTION: A video terminal part 1, an S-terminal part 4, the switches 8 and 12 are provided in the same casing. The fixing piece 9 of the switch 8 is connected to the signal terminal 3 of the video terminal part 1. A moving piece 10 is connected to the output terminal 20 of a composite signal, and the fixing piece 13 of the switch 12 is connected to ground. A moving piece 14 is connected to the output terminal 23 of the control signal and the connector of a prescribed form is connected to the S-terminal part 4. When an S-video signal is inputted, operation levers 11 and 15 are pushed at the external part of the connector, the moving pieces 10 and 14 are moved and the switches 8 and 12 are turned off. The signal from the video terminal part 1 is automatically interrupted, the output terminal 23 connected to a B-power source through a resistor 19 is set to be an H-level and the control signal is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal input terminal, and more particularly to a switch-equipped signal input terminal for switching and outputting two inputs. In satellite broadcasting, a wideband (S) video signal (hereinafter abbreviated as S video signal) whose frequency band has been widened is used. In order to receive the S video signal and reproduce an image with high resolution, Requires the signal processing by switching between the processing circuit for processing the S video signal and the normal video signal.

[0002]

2. Description of the Related Art In conventional video equipment such as televisions,
As shown in FIG. 3, an S video signal input terminal 40 having a changeover switch 42 and a video input terminal 41 for inputting a normal video signal such as a terrestrial broadcast are independently provided, and the video input terminal 41 and the changeover switch 42 are provided. The composite signal is output from the output side of the selector switch 42 by connecting to the input side of the selector switch 42, the composite signal is processed by the composite signal processing unit 16 incorporated in the television, and the composite signal is output via the selector 18. , So that it can be displayed as an image by the same output. When receiving the S video signal, the selector switch 42 is manually turned off to prevent the composite signal from being output from the selector switch 42, and the S video signal is input to the S video signal input terminal 40 using a predetermined connector. Input,
Switch 43 connected to ground by connecting the same connector
Is opened, the control terminal of the switch 18 connected to the switch 43 and connected to the B power source through the pull-up resistor 19 is set to the H level, and the S video signal processing circuit 1
The signal from No. 7 is output via the switch 18, and the S video signal can be displayed as an image by the output.

[0003]

Therefore, since the S video signal input terminal 40 and the video input terminal 41 are independently mounted, the switching provided at the video input terminal 41 and the S video signal input terminal 40 is performed. It is necessary to connect with the switch 42, which requires time and effort for installation and connection.
When receiving the S video signal, it was necessary to operate the changeover switch 42. According to the present invention, the S-video signal input terminal and the video input terminal having the changeover switch are attached in advance by connecting the changeover switch and the video input terminal in the same housing and integrating them. In addition to saving connection work, when a connector is connected to the S video signal input terminal, a signal input with a switch that automatically cuts off the signal from the video input terminal and outputs a control signal for switching the signal processing unit It is intended to provide terminals.

[0004]

Means for Solving the Problems The first invention of the present application is the first invention.
A second input terminal for inputting the second video signal, a second input terminal for inputting the second video signal, and a second input terminal provided with the second input terminal. When the video signal is input, the opening / closing means for automatically shutting off the signal output circuit from the first input terminal is provided in the same housing. A second invention of the present application is provided with a first input terminal for inputting a first video signal, a second input terminal for inputting a second video signal, and the second input terminal,
An opening / closing means for automatically shutting off the signal output circuit from the first input terminal when a second video signal is input by connecting a connector having a predetermined shape, and the first input terminal or the first input terminal. It is characterized in that the same housing is provided with control signal generating means for generating a control signal for switching a signal processing unit for processing a signal from the two input terminals.

In a third invention of the present application, the opening / closing means is the first
Second fixed input, a first movable piece that is in contact with the first fixed piece, and the second movable input that moves the first movable piece to separate the contact point with the first fixed piece. A first switch having a first operation lever provided in a terminal mounting portion, and with respect to the first fixed piece and the first movable piece,
When one of the connectors is connected to the first input terminal and the other is a signal output side and a connector having a predetermined shape is connected to the second input terminal, the first operating lever is provided outside the connector. Is operated to move the first movable piece to automatically cut off the signal from the first input terminal.

According to a fourth aspect of the present invention, the control signal output means moves the second fixed piece, the second movable piece in contact with the second fixed piece, and the second movable piece. The second
The second fixed piece and the second movable piece, the second switch having a second operation lever provided in the mounting portion of the second input terminal for separating the contact point with the fixed piece. In contrast, when one of the connectors is connected to the ground and the other is connected to the power source through the pull-up resistor, and the connector having a predetermined shape is connected to the second input terminal, the outer shell of the connector is connected. Is operated to move the second movable piece to generate an H level signal. A fifth aspect of the present invention is characterized in that a wideband (S) video signal having a widened frequency band is input to the second input terminal.

[0007]

The signal input terminal with switch of the first invention of the present application is
A first input terminal for inputting a first video signal into the same housing, a second input terminal for inputting a second video signal, and a connector provided in the second input terminal and having a predetermined shape. And an opening / closing means for automatically shutting off the signal output circuit from the first input terminal when the second video signal is input by connecting the first input terminal to the same housing. The opening / closing means for blocking the signals from the terminals, the second input terminal and the first input terminal is provided, and the labor for attaching the individual input terminals or connecting the input terminal and the opening / closing means is saved. By connecting a connector having a predetermined shape to the second input terminal, the signal from the first input terminal is cut off, so that the trouble of manually switching the output signal can be saved.

The signal input terminal with switch according to the second invention of the present application is the first input according to the first invention, when the second video signal is input by connecting the connector having a predetermined shape. A control signal generating means for generating a control signal for switching a signal processing unit for processing a signal from the terminal or the second input terminal is provided, and therefore, a connector having a predetermined shape is connected to the second input terminal. By doing so, the signal from the first input terminal is cut off as in the first aspect of the invention, so that the trouble of manually switching the output signal is saved and a control signal for switching the signal processing unit is automatically generated. By doing so, the signal processing unit can be switched so that the video signal input to the second input terminal is preferentially processed.

The switch-equipped signal input terminal according to the third invention of the present application is, in the first and second inventions, a first fixing piece and this first fixing piece as opening / closing means for cutting off a signal from the first input terminal. The first movable piece brought into contact with the first fixed piece, and the first movable piece is moved to separate the contact point with the first fixed piece. A first switch having a first operation lever is provided, and one of the first fixed piece and the first movable piece is connected to the first input terminal and the other is set to the signal output side, and the second When a connector of a predetermined shape is connected to the input terminal of, the first operating lever is operated by the outer shell of the connector to move the movable piece, and the contact between the fixed piece and the movable piece is separated. , Therefore the second
If a second video signal is input to the input terminal of the connector using a connector having a predetermined shape, the signal from the first input terminal can be automatically cut off.

A signal input terminal with a switch according to a fourth aspect of the present invention generates a control signal for switching a signal processing unit for processing a signal from the first input terminal or the second input terminal in the second aspect of the invention. As a control signal generating means,
A second input, a second fixed piece, a second movable piece that is in contact with the second fixed piece, and a contact between the second movable piece and the second fixed piece that are moved to separate the contact point with the second fixed piece. A second switch having a second operation lever provided on the terminal mounting portion is provided, and one of the second fixed piece and the second movable piece is connected to the ground and the other is for pull-up. When the second input terminal is connected to the power supply via the resistor and the connector having the predetermined shape is connected to the second input terminal, the second operating lever is operated by the outer shell of the connector to move the second movable piece. The H-level signal is generated by moving it. Therefore, if the second video signal is input to the second input terminal by using the connector having the predetermined shape, the signal processing unit is automatically switched. It becomes possible to generate a control signal. In the signal input terminal with switch of the fifth invention of the present application, in the first to fourth inventions, an S video signal having a wide frequency band is input to the second input terminal. By inputting, the video signal input from the first input terminal is blocked, and the signal processing unit can be switched, so that it becomes possible to preferentially process the S video signal. It is possible to prevent interference with the video signal input from the terminal.

[0011]

FIG. 1 is a block diagram of a signal input terminal with a switch showing an embodiment of the present invention. In the figure, the same components as those shown in FIG. 3 are designated by the same symbols. The S terminal section 4 is composed of signal terminals 5 and 6 for inputting an S video signal, a ground terminal 7, and switches 8 and 12, and the video terminal section 1 uses, for example, a phono pin plug, and a signal terminal 3 and a ground terminal. 2 and the S terminal portion 4 and the video terminal portion 1 are housed in the same housing. The S video signal is input between the signal terminals 5 and 6 and the ground terminal 7. For example, the luminance signal Y is input to the signal terminal 5, the color signal C is input to the signal terminal 6, and the luminance signal Y and the color signal are input. C is output from each of the output terminals 21 and 22 of the housing of the signal input terminal. A composite signal of a video signal is input between the signal terminal 3 and the ground terminal 2 of the video terminal unit 1.

The fixed piece 9 of the switch 8 is connected to the signal terminal 3 of the video terminal portion 1, the movable piece 10 is connected to the output terminal 20 of the composite signal provided in the housing, and the S terminal portion 4 is formed in a predetermined shape. When the S connector is connected and the S video signal is input, the operating lever 11 is pushed in by the outer shell of the connector to move the movable piece 10 to disconnect the contact between the fixed piece 9 and the movable piece 10. Therefore, the composite signal can be blocked so as not to be output from the output terminal 20. The fixed piece 13 of the switch 12 is connected to the ground, the movable piece 14 is connected to the output terminal 23 of the control signal provided in the housing, and the S terminal portion 4 is connected to a connector having a predetermined shape to connect the S video signal. When inputting, enter the operation lever 1 on the outside of the connector.
The movable piece 14 is moved by pushing 5 to separate the contact between the fixed piece 13 and the movable piece 14.

The control signal output terminal 23 is connected to the control terminal of the switching device 18 and is also connected to the B power source on the video equipment side such as a television via the pull-up resistor 19, and the fixed piece 13 and the movable piece. When the contact of 14 is cut off, the switch 18
The control terminal of is set to H level. On the video equipment side such as a television, a composite signal processing unit 16 and an S video signal processing unit 17 are provided.
And the composite signal processing unit 1
In 6, the composite signal input from the output terminal 20 is subjected to processing such as amplification and output to be input to one of the input terminals of the switch 18, and in the S video signal processing unit 17, the S signal input from the output terminals 21 and 22. The video signal is output after being subjected to processing such as amplification, and is input to the other input terminal of the switch 18.

The switch 18 selects and outputs the signal from the composite signal processing section 16 when the control terminal is at the L level, and outputs the signal from the S video signal processing section 17 when the control terminal is at the H level. I am trying to select and output
Therefore, when the S video signal is input using the connector having the predetermined shape, the switches 8 and 12 are automatically turned off, and the S video signal is preferentially given to the S video signal processing unit 17
And is output as a video signal output through the switch 18, and based on the output, the image of the S video signal input can be displayed on the display unit or the like.

FIG. 2 is a partially cutaway perspective view of a signal input terminal with a switch showing an embodiment of the present invention. Output terminals 20 to 23 and a ground terminal 24 are provided on the surface of the housing 32 of the signal input terminal, and these terminals are used to input a signal to a video equipment such as a television. A video signal 34 for inputting a composite signal and an S terminal 33 for inputting an S video signal are arranged on the surface of the housing 32, and the electrode portion 31 provided in the connector 30 of the S cable is inserted into the S terminal 33. S
The video signal can be input. The operation levers 11 and 15 are provided in the vicinity of the S terminal 33, and when the connector 30 of the S cable is connected to the S terminal 33, the operation levers 11 and 15 are pressed by the outer shell of the connector 30. It is placed in a proper position.

Inside the housing 32, the fixed piece 9 of the switch 8 is integrated with the signal terminal of the video terminal 34, and is bent to form the fixed piece 9, which is brought into contact with the movable piece 10 arranged below the fixed piece 9. When the operating lever 11 is pushed in, the operating lever 1 is attached to the tip of the movable piece 10.
Make 1 hit. Also, the fixed piece 1 of the switch 12
3 is connected to the ground, and is arranged so as to be in contact with a movable piece 14 arranged below the fixed piece 13;
When 5 is pushed in, the operating lever 15 is brought into contact with the tip of the movable piece 14. Therefore, when the S video signal is input to the S terminal 33 using a connector having a predetermined shape, the switches 8 and 12 are automatically turned off.

[0017]

As described above, according to the present invention,
An S terminal 33 and a video input terminal 34 are provided on the housing 32 of the signal input terminal, and the switch 8 and the video input terminal 34 are further provided.
Are pre-connected and integrated, and therefore, the labor of mounting each terminal individually and the labor of connecting between the video input terminal 34 and the switch 8 are eliminated, and the S terminal 3
When the connector 30 of a predetermined shape is connected to 3, the signal from the video input terminal 34 is automatically cut off, and
A switch-equipped signal input terminal capable of generating a control signal for switching the signal processing unit can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of a signal input terminal with a switch showing an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a signal input terminal with a switch showing an embodiment of the present invention.

FIG. 3 is a block diagram of a signal input terminal showing a conventional example.

[Explanation of symbols]

 1 Video terminal part 2 Ground terminal 3 Signal terminal 4 S terminal part 5 Signal terminal 6 Signal terminal 7 Ground terminal 8 Switch 9 Fixed piece 10 Movable piece 11 Operation lever 12 Switch 13 Fixed piece 14 Movable piece 15 Operation lever 16 Composite signal processing section 17 S video signal processing section 18 Switching device 19 Resistor 20 Output terminal 21 Output terminal 22 Output terminal 23 Output terminal 24 Ground terminal 30 Connector 31 Electrode section 32 Housing 33 S terminal 34 Video terminal

Claims (5)

[Claims] 1. A first input terminal for inputting a first video signal, a second input terminal for inputting a second video signal, and a connection of a predetermined shape provided on the second input terminal. Signal with a switch equipped with an opening / closing means for automatically shutting off a signal output circuit from the first input terminal when a second video signal is input by connecting a controller. Input terminal. 2. A first input terminal for inputting a first video signal, a second input terminal for inputting a second video signal, and a connection of a predetermined shape provided on the second input terminal. From the first input terminal or the second input terminal, which automatically shuts off the signal output circuit from the first input terminal when the second video signal is input by connecting the controller. A signal input terminal with a switch, the control signal generating means for generating a control signal for switching a signal processing unit for processing the signal of 1. 3. The opening / closing means moves a first fixed piece, a first movable piece in contact with the first fixed piece, and the first movable piece to move the first fixed piece. A first switch having a first operation lever provided on a mounting portion of the second input terminal for separating a contact point between the first switch and the first switch,
When one of the fixed piece and the first movable piece is connected to the first input terminal and the other is a signal output side, and a connector having a predetermined shape is connected to the second input terminal. 7. A signal from the first input terminal is automatically cut off by operating the first operating lever outside the same connector to move the first movable piece. The signal input terminal with a switch according to claim 1 or claim 2. 4. The control signal output means moves a second fixed piece, a second movable piece brought into contact with the second fixed piece, and the second movable piece to move the second movable piece. A second switch having a second operation lever provided on a mounting portion of the second input terminal for separating a contact point with a fixed piece,
One of the second fixed piece and the second movable piece is connected to ground, the other is connected to a power source through a pull-up resistor, and the second input terminal is connected in a predetermined shape. 3. The H-level signal is generated by operating the second operation lever on the outer shell of the connector when the device is connected to move the second movable piece. Signal input terminal with switch. 5. The switch-equipped signal input terminal according to claim 1, wherein a wideband (S) video signal having a widened frequency band is input to the second input terminal.