JP2001057657A - Signal input output controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a signal input output controller that allows a user to simply view and hear video and audio signals by turning on/off an AV device through a simple operation of plugging/withdrawing a plug fitted to a cord to/from a jack of the AV device or the like. SOLUTION: When plugs 6, 7 are plugged into jacks 3, 4, signal terminals 6b, 7b and ground side terminals 6a, 7a of the plugs 6, 7 are mutually connected to signal input output terminals 3b, 4b and ground side input output terminals 3a, 4a of the jacks 3, 4 so as to attain the input output of a signal between an external device and a control object device 1 via the signal input output terminals 3b, 4b in the signal input output controller. The signal input output terminals 3b, 4b are provided with a switch means that is turned on/off by plugging/withdrawing the plugs 6, 7 to/from the jacks 3, 4, and when the switch means outputs an ON or OF signal, a control means 16 conducts operation control of the control object device 1 in response to the type of the signal introduced from the signal terminals 6a, 7b of the plugs 6, 7 to the signal input output terminals 3b, 4b of the jacks 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal for introducing a video / audio signal from a television receiver (TV) to a video tape recorder (VTR) and transmitting the output of these AV devices to earphones or headphones. It relates to an input / output control device.

[0002]

2. Description of the Related Art As an example of a device having an input terminal for switching and introducing a signal from an AV device, an automatic signal switching device for selectively taking in a TV television signal and a video signal or a plurality of video signals is known. (Japanese Patent Laid-Open No. 62
-84663). This automatic signal switching device
A plurality of input terminals, signal switching means, detection means, special control means, and the like are provided as main parts. Then, the detection output of the signal detection means for detecting the presence or absence of a video signal applied to the video input terminal is input, and it is determined that the detection output has changed from the "absence" state to the "presence" state, and the change has occurred. The signal switching means is controlled so as to select a video input terminal.

Further, a special control means for controlling the power supply control means is provided in order to turn on the power of the circuit after the signal switching means. Thus, when an external video device or the like enters the playback state, the switching signal processing circuit is turned on so that the signal is detected and the signal is automatically taken in, and the switch is automatically switched so that the image of the signal can be seen. Can be switched. Therefore, the user does not have to turn on the power or switch the switch, and the number of erroneous operations can be reduced.

[0004]

By the way, the above-mentioned conventional automatic signal switching device enables automatic viewing when a reproduction signal is input to a TV after an external video device is set to a reproduction state. On the contrary, there has been a problem that when a signal is transmitted from the TV to an external video device for recording, it cannot be automated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a simple operation of inserting / removing a plug attached to a cord into a jack of an AV device or the like to turn on / off the AV device and easily perform the operation. It is an object of the present invention to provide a signal input / output control device capable of listening to video and audio.

[0006]

To achieve the above object, according to the first aspect of the present invention, when a plug is inserted into a jack, a signal side terminal and a ground side terminal of the plug are connected to the jack. A signal input / output control device which is connected to a signal side input / output terminal and a ground side input / output terminal and enables input / output of a signal between an external device and a controlled device via the signal side input / output terminal. And the signal-side input / output terminals
A switch means for turning on and off by inserting and removing the plug from the jack is provided. When an on or off signal is transmitted from the switch means, a signal side input / output terminal of the jack is connected to a signal side terminal of the jack. And control means for controlling the operation of the controlled device in accordance with the type of signal introduced to the device. Further, in the invention according to claim 2, the control means includes:
When an ON signal is sent from the switch means,
When the power of the control target device is off, control for turning on the power of the control target device is performed. Further, the invention according to claim 3 is characterized in that the control means is configured such that when an ON signal is transmitted from the switch means, and when the power of the controlled device is off,
It is characterized in that the control target device is turned on and then switched to the external input mode, and if the power is on, control is performed to immediately switch to the external input mode. The invention according to claim 4 is characterized in that the controlled device is a video / audio device. The invention according to claim 5 is characterized in that the external device is an information reproducing device. The invention according to claim 6 is characterized in that the plug is connected to an earphone, headphones, or the like. The invention according to claim 7 is characterized in that the signal-side input / output terminal and the ground-side input / output terminal are each divided into a pair of a signal input terminal and a signal output terminal.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an electric circuit diagram of a signal input / output control device according to an embodiment of the present invention. This signal input / output control device is applied to a popular television receiver (TV) 1 and has a plug 6 of a cord connected to a video tape recorder (VTR) not shown.
7 and the plug 8 of the earphone to the jacks 3, 4, 5,
The TV 1 is turned on and off by plugging in and out, so that the reproduced image or broadcast program can be viewed. The TV 1 includes a power supply unit 9, a tuner 10, a Y / C / A separation circuit 11 of a reception circuit unit, a video signal processing unit 12, an audio signal processing unit 13, a changeover switch (not shown), a transmission / reception unit, and a control unit in a cabinet body. 16 etc. are built in,
A plurality of pairs of jacks 3, 4, and 5 are provided on front and rear panels of the cabinet body. These jacks 3, 4
Three sets are provided for external inputs into which video and audio plugs 6 and 7 are inserted. Usually, one set is provided on the rear panel side and one set is provided on the front panel side. About 2
Since this set of stereo units has the same configuration, only one configuration will be described as shown in the illustrated example. Note that the earphone jack 5 to which the earphone plug 8 is plugged in is provided on the front panel side.

Each of the video and audio jacks 3, 4 comprises ground side input / output terminals 3a, 4a and signal side input / output terminals 3b, 4b.
Are provided in the insertion holes 2a and 2b, respectively. The jacks 3 and 4 are provided with movable contacts 3c and 4c constituting a switch means and a pair of fixed contacts 3d and
3e, 4d and 4e are provided. Ground side input / output terminal 3
Reference numerals a and 4a denote cylindrical conductors, which are fitted in the insertion holes 2a and 2b. Also, the signal side input / output terminals 3b, 4b
Is made of a leaf-spring-like conductor whose tip is bent in a substantially rectangular shape, is insulated from the ground-side input / output terminals 3a, 4a, and has its base end fixedly provided inside the insertion holes 2a, 2b. ing. Further, the movable contacts 3c and 4c of each switch means are made of a plate-like conductor, and are connected to the signal-side input / output terminals 3 via an insulating shaft.
b, 4b. In addition, fixed contact 3
d, 3e, 4d, and 4e are provided at predetermined intervals at positions facing the movable contacts 3c and 4c.

The plugs 6 and 7 have pin-shaped and electrically conductive signal-side terminals 6b and 7b integrated with grounded terminals 6a and 7a made of a conductor via an insulating material. The ground-side terminals 6a and 7a are covered on the rear end side with an insulating cover, exposing the front end side. This plug 6,7
Is attached to both ends of the cord, and the plug at one end is
The plugs are inserted into the jacks 3 and 4 on one side, and the plug on the other end is inserted into the jack on the VTR side (not shown) to connect them.
Thus, the plugs 6 and 7 are inserted into the insertion holes 2 of the jacks 3 and 4.
a, 2b, the ground-side terminals 6a, 7a of the plugs 6, 7 are connected to the ground-side input / output terminals 3 of the jacks 3, 4.
a, 4a, and the signal side terminals 6b, 7b contact the signal side input / output terminals 3b, 4b. At this time, when the signal-side input / output terminals 3b, 4b are elastically deformed by the pressing force and move downward, the movable contacts 3c, 4c become fixed contacts 3d, 3e.
And 4d and 4e, respectively, to be turned on. On the other hand, when the plugs 6, 7 are pulled out from the insertion holes 2a, 2b of the jacks 3, 4, the signal side terminals 6b, 7
b is separated from the signal-side input / output terminals 3b, 4b, the signal-side input / output terminals 3b, 4b return to their original shapes, and the movable contacts c3c, 4c and the fixed contacts 3d, 3e, 4d, 4e do not contact each other. And the switch is turned off.

A jack 5 for the earphone comprises a ground-side output terminal 5a and a signal-side output terminal 5b, and includes a movable contact 5c and a pair of fixed contacts 5d and 5 which constitute switch means.
In addition to e, a switching contact 5f for signal switching and a holding contact 5g are provided, and are provided in an insertion hole 2c opened in the side wall 2. The ground-side output terminal 5a is also a cylindrical conductor,
It is fitted in the insertion hole 2c. The signal-side output terminal 5b is also made of a leaf spring-like conductor whose tip is bent in a substantially elliptical shape, and is insulated from the ground-side output terminal 5a.
The base end is fixed inside the inside of c.

Further, the movable contact 5c of the switch means also
It is made of a plate-shaped conductor, and is connected to the base end of the signal output terminal 5b via an insulating shaft. Further, the fixed contacts 5d and 5e are provided at a position facing the movable contact 5c with a required interval. The switching contact 5f for signal switching is made of a leaf spring-like conductor whose tip is bent in a substantially elliptical shape, and has a base end fixed inside the insertion hole 2c so as to be parallel to the signal side output terminal 5b. are doing. Also, the holding contact 5
g is provided at a position facing the switching contact 5f so as to maintain contact with the switching contact 5f in a normal state. The holding contact 5g is connected to the speaker 15.

The plug 8 has a pin-shaped, electrically conductive signal-side terminal 8b in a cylindrical, electrically-conductive ground-side terminal 8a.
Are integrated via an insulating material. The ground terminal 8a is
The rear end side is covered with an insulating cover, and the front end side is exposed. The plug 8 is attached to one end of a cord provided with an earphone (not shown).
Into the jack 5 on the TV 1 side for connection. Thus, when the plug 8 is inserted into the insertion hole 2c of the jack 5, the ground-side terminal 8a of the plug 8 contacts the ground-side output terminal 5a of the jack 5, and the signal-side terminal 8b is connected to the signal-side output terminal. The terminal 5b contacts the switching contact 5f. At this time, when the signal side output terminal 5b is elastically deformed by the pressing force and moves downward, the movable contact 5c comes into contact with the fixed contacts 5d and 5e to be in a switch-on state. Further, when the switching contact 5f is elastically deformed by the pressing force and moves upward, the switching contact 5f is separated from the holding contact 5g to be in a non-contact state.

On the other hand, the plug 8 is inserted into the insertion hole 2 c of the jack 5.
When the signal is pulled out from the terminal, the signal side terminal 8b is separated from the signal side output terminal 5b, so that the signal side output terminal 5b returns to its original shape, and the movable contact 5c and the fixed contacts 5d and 5e become non-contact. The switch is turned off. Also, plug 8
Is pulled out from the insertion hole 2c of the jack 5, the switching contact 5f returns to its original shape and moves down, so that the switching contact 5f comes into contact with the holding contact 5g again.

The power supply section 9 comprises an input circuit section 9a and an output circuit section 9b, and a commercial power supply is introduced into the input circuit section 9a via a fuse. Input circuit section 9a
Has a rectifier circuit, a smoothing circuit, a switching circuit, a plurality of output terminals, and the like. The low-voltage output terminals have fixed contacts 3d, 4d, 5d of the jacks 3, 4, 5, and a power input of the control unit 16. Side is connected. The output circuit section 9b is connected to the output terminal on the high voltage side via the switch 9c. When commercial power is introduced into the power supply unit 9,
A low-voltage signal voltage is supplied from the input circuit section 9a to each of the fixed contacts 3d, 4d, and 5d, and a signal voltage is also sent to the control section 16. When the control section 16 turns on the switch 9c, the control section 16 supplies a high voltage to a built-in electric circuit connected to each terminal of the output circuit section 9b to operate the TV1.

The tuner 10 is connected to a Y / C / A separation circuit 11 and a control unit 16.
A specific broadcast station is selected based on the channel selection signal from, and the signal of that channel is sent to the Y / C / A separation circuit 11. The Y / C / A separation circuit 11 includes a video signal processing unit 1
2. It is connected to the audio signal processing unit 13 and the transmission / reception unit, and separates an input signal to convert a video signal into a video signal processing unit 12.
Then, the audio signal is sent to the audio signal processing unit 13 respectively.
In addition, an audio / video signal is supplied to a transmission / reception unit in response to a command signal from the control unit 16. The video signal processing unit 12 is composed of a chroma IC, and is connected to a cathode ray tube (CRT) 1 via a transmission / reception unit and an image processing circuit (not shown).
4 is connected. The audio signal processing unit 13 is a stereo IC, and is connected to a speaker driving circuit and a transmitting / receiving unit.

The transmission / reception unit is connected to the control unit 16 and the changeover switch. When an audio / video signal is transmitted from the Y / C / A separation circuit 11, the signal is transmitted to the changeover switch. When an audio / video signal is transmitted from the changeover switch, the video signal is transmitted to the video signal processing unit 1.
Second, an audio signal is transmitted to the audio signal processing unit 13. Thereby, the reception signal of the broadcast wave received by the antenna is transmitted to the video signal processing unit 12 and the audio signal processing unit 13 of the TV 1 so that the video is displayed on the screen of the CRT 14 and the sound is emitted from the speaker 15. . Also, the reception signals input to the video signal processing unit 12 and the audio signal processing unit 13 can be transmitted to the jacks 3 and 4 and transmitted to an external VTR. On the other hand, this V
The reproduced signals transmitted from the TR to the jacks 3 and 4 are introduced into the video signal processing unit 12 and the audio signal processing unit 13 so that the reproduced image is displayed on the screen of the CRT 14 and the sound is emitted from the speaker 15. Will be possible.

The control section 16 is a microcomputer comprising a CPU, a ROM and a RAM. The control section 16 has signal-side input / output terminals 3b and 4b of the jacks 3 and 4, and fixed contacts 3e, 4e and 5e of each switch means. Is connected to Further, it is connected to the tuner 10, the video signal processing unit 12, the audio signal processing unit 13, each switch, the transmission / reception unit and others. When any of the plugs 6, 7, 8 is plugged into or unplugged from the jacks 3, 4, 5, the control unit 16 turns on / off the power of the TV 1 in response to an on or off signal sent from the switch means. In addition to performing the operation control of turning off, the operation is controlled in accordance with the type of signal introduced from the signal side terminals 6b, 7b of the plugs 6, 7 to the signal side input / output terminals 3b, 4b of the jacks 3, 4. Has become.

Next, the operation of the signal input / output control device will be described with reference to FIGS. However, if the user wants to use the TV1 and VTR in various ways,
It is assumed that the VTR has a jack, a control unit, and the like having the same signal-side input / output terminals as those provided on the TV 1.
First, when it is desired to listen to the reproduction information from the VTR on the TV 1, as shown in FIG. 2, when the video plug 6 is inserted into the jack 3 and connected, for example, the signal side terminal 6 b
Contacts the signal side input / output terminal 6b, and the movable contact 3c of the switch means contacts the fixed contacts 3d and 3e to be turned on. Then, the signal voltage from the power supply unit 9 changes to the control unit 1.
6 and the input side of the control unit 16 changes from L level to H level. Accordingly, the control section 16 turns on the switch 9c of the power supply section 9 to supply a voltage from the output circuit section 9b to each section of the built-in circuit, thereby turning on the TV1.

In this state, when the user inserts and connects the video plug at the other end of the cord to the jack of the VTR,
Since the TR also turns on, the reproduced signal from this VTR
It is sent to the V1 side. When this reproduced signal is introduced into the signal side input / output terminal 3b of the jack 3, the control unit 16 detects a synchronizing signal of the video signal and sends it out to the image processing circuit via the video signal processing unit 12. When the audio plug 7 is plugged into the jack 4, an audio signal is transmitted to the speaker drive circuit via the audio signal processing unit 13. Therefore,
A reproduced image is displayed on the CRT 14 and a sound is emitted from the speaker 15. As a result,
VT without the need to press remote control keys as before
R playback information can be viewed.

On the other hand, when a user wants to record a broadcast program received by TV 1 on a VTR, as shown in FIG.
After the video plug 6 and the audio plug 7 are plugged into the respective jacks 3 and 4, the video plug and the audio plug at the other end are plugged into the respective jacks of the VTR. Accordingly, the TV 1 and the VTR are turned on, and if the VTR is set in the recording mode in advance,
The broadcast program of the selected channel is recorded on a video tape. To stop the TV 1 and the VTR, the plugs 6 and 7 are inserted into the insertion holes 2a and 2a of the jacks 3 and 4.
What is necessary is just to extract from 2b. Then, the movable contacts 3c and 4c of any of the switch means and the fixed contacts 3d, 3e or 4
Since d and 4e are not in contact with each other and are turned off, the signal voltage from the power supply unit 9 is not transmitted to the control unit 16 side. The control unit 16 is configured such that the input side is lower than H level.
As the level changes, the switch 9c of the power supply unit 9 is turned off and the TV 1 is turned off. Such behavior is
The same applies to the VTR side, and the VTR can be turned off when the plug is removed from the jack.

When the user wants to view only the broadcast program on the TV 1, as shown in FIG. 3, when the earphone plug 8 is plugged into the jack 5, the signal side terminal 8b is connected to the signal side output terminal 5b. Upon contact, the switch means is switched on. Accordingly, when the control unit 16 turns off the switch 9c of the power supply unit 9, the TV 1 is turned on to turn it on. When the earphone plug 8 is inserted and connected, the switching contact 5f moves upward, so that the switching contact 5f is separated from the holding contact 5g to be in a non-contact state, and the audio signal from the audio signal processing unit 13 is transmitted to the speaker 15
It is not sent to the side, but sent to the earphone side. Therefore, C
Since the playback image is displayed on the RT 14 and the sound is emitted from the earphone, the user can view the broadcast program without the need to operate the remote controller by pressing the keys as in the related art.

On the other hand, when the earphone plug 8 is pulled out from the insertion hole 2c of the jack 5, the signal side output terminal 5b returns to its original shape and moves upward, so that the movable contact 5c and the fixed contacts 5d, 5e of the switch means are connected. The contact becomes non-contact, and the signal voltage from the power supply unit 9 is not transmitted to the control unit 16 side. Therefore, the control unit 16 turns off the switch 9c of the power supply unit 9 and sets T
V1 is turned off. Further, since the switching contact 5f moves down and returns to the original shape, it comes into contact with the holding contact 5g again, so that the audio signal from the audio signal processing unit 13 can be transmitted to the speaker 15 side. As described above, the user can turn on / off the TV 1 simply by plugging and unplugging the earphone plug 8 into / from the jack 5, so that it is not necessary to always operate the remote controller as in the related art. In the above embodiment, the signal input / output control device is set to TV1 and VTR.
Has been described above, but it goes without saying that the present invention can be widely applied to various AV devices such as radios and video cameras.

[0023]

As described above, according to the first aspect of the present invention, the device to be controlled is turned on just by inserting the plug of the external device into the jack of the device to be controlled,
In addition, while performing operation control according to the type of the input signal, the operation can be stopped by turning off the power switch once the plug is unplugged.
Further, a series of operations such as selecting and operating a function or stopping by performing an OFF operation are not required, and the operability of various electric devices is significantly improved. Further, according to the invention described in claim 2, when the power of the controlled device is turned off when the ON signal is transmitted from the switch means, the power of the controlled device is turned on. There is an advantage that it can be put into use only by inserting a plug. The invention described in claim 3 is:
When an ON signal is sent from the switch means and the power of the controlled device is off, the power of the controlled device is turned on and then switched to the external input mode. If the power is on, the external input is immediately performed. By switching to the mode, there is an advantage that use can be started only by inserting a plug into the jack and external information can be obtained.

According to the fourth aspect of the present invention, since the device to be controlled is a video / audio device, use of the video / audio device is started only by inserting a plug into the jack, so that the user can watch a video or hear a sound. There is an advantage that can be heard. Also,
Since the external device is an information reproducing device, there is an advantage that reproduction information from this information reproducing device can be obtained only by inserting a plug into a jack.
Further, in the invention according to claim 6, since the plug is connected to the earphone, the headphone, or the like, the use of the video / audio device is started only by inserting the plug of the earphone into the jack, so that the user can watch the video or sound. There is an advantage that you can listen to. According to the invention described in claim 7, the signal-side input / output terminal and the ground-side input / output terminal are separated into a pair of signal input terminals and signal output terminals, respectively. Signal transmission can be dedicated to each, and there is an advantage that various external devices can be connected and used.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of a signal input / output control device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state where a plug is inserted and connected to a jack on the signal input side of the signal input / output control device.

FIG. 3 is an explanatory diagram showing a state where a plug is inserted and connected to a jack on the signal output side of the signal input / output control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control target apparatus 3, 4 Jack 3a, 4a Ground side input / output terminal 3b, 4b Signal side input / output terminal 6, 7 Plug 6a, 7a Ground side terminal 6b, 7b Signal side terminal 16 Control means

Claims (7)

[Claims] When a plug is inserted into a jack, a signal side terminal and a ground side terminal of the plug are mutually connected to a signal side input / output terminal and a ground side input / output terminal of the jack, and the signal side input / output terminal is connected to the jack. A signal input / output control device that enables input / output of signals between an external device and a control target device via an external device, wherein the signal side input / output terminal is turned on / off by connecting / disconnecting the plug to / from the jack. A switch means, and when an on or off signal is transmitted from the switch means, the control target device according to the type of signal introduced from the signal side terminal on the plug side to the signal side input / output terminal of the jack. A signal input / output control device comprising control means for controlling the operation of the signal. 2. The control means controls the power of the controlled device to be turned on when the power of the controlled device is turned off when an on signal is transmitted from the switch device. The signal input / output control device according to claim 1, wherein the control is performed. 3. When the control unit sends an ON signal from the switch unit, and when the power of the controlled device is off, the control unit turns on the power of the controlled device and then switches to the external input mode. 3. The signal input / output control device according to claim 1, wherein control is performed to immediately switch to an external input mode when the power is turned on. 4. The signal input / output control device according to claim 1, wherein the control target device is a video / audio device. 5. The signal input / output control device according to claim 1, wherein the external device is an information reproducing device. 6. The signal input / output control device according to claim 1, wherein the plug is connected to an earphone, headphones, or the like. 7. The signal input / output control according to claim 1, wherein the signal side input / output terminal and the ground side input / output terminal are divided into a pair of signal input terminals and signal output terminals. apparatus.