JP3024168B2 - I / O terminal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an input / output terminal device suitable for application to, for example, a monitor television integrated VTR.

[Summary of the Invention]

The present invention relates to an input / output terminal device suitable for application to, for example, a monitor television integrated type VTR, etc., and relates to an input / output terminal, a control means for outputting a control signal based on the operation state of an operation button, and Means for automatically allocating an input / output terminal as an input terminal or an output terminal based on a control signal from the means, thereby simplifying the configuration of the input / output terminal group and inputting or outputting a signal. Can be performed reliably.

[Conventional technology]

Conventionally, an input / output terminal device as shown in FIG. 4 is used in a monitor television integrated type VTR or the like.

In FIG. 4, (1) is a video input / output jack to which a video signal is input or output, and the hot side contact (1h) of the video input / output jack (1) is a switch of the switching circuit (6). Connected to the movable contact (3a) of (3),
The cold side contact (1c) of this video input / output jack (1) is grounded. The recording-side fixed contact (3b) of the switch (3) is connected to a video signal input terminal of a recording / reproducing apparatus described later, and the reproduction-side fixed contact (3) of the switch (3) is connected.
c) is connected to the video signal output terminal of the recording / reproducing device.

The recording / reproducing device input (7) includes a stop button, not shown,
A signal supplied to a video signal input terminal is recorded on a magnetic tape or a reproduced video signal from a magnetic tape is output via a video signal output terminal in accordance with ON / OFF of a reproduction button and a recording button. Further, the video signal supplied to the video signal input terminal is supplied to the monitor (8a) so that the video signal is displayed on the display section of the monitor (8a) or the monitor (8a)
A reproduced video signal reproduced from a magnetic tape is supplied, and the reproduced video signal is displayed on a display section of the monitor (8a). The recording / reproducing apparatus has a so-called TV tuner, and is provided with an antenna (not shown).
A television signal from a broadcasting station is received and supplied to a monitor (8a) so that the received television signal is displayed on this display unit.

(2L) is a left audio input / output jack to which a left audio signal is input or output. The hot side contact (2Lh) of the left audio input / output jack (2L) is a switch (4) of a switching circuit (6). And the cold side contact (2Lc) of the left audio input / output jack (2L) is grounded. Recording side fixed contact (4b) of this switch (4)
Is connected to the left audio signal input terminal of the recording / reproducing device, and the reproduction-side fixed contact (4c) of the switch (4) is connected to the left audio signal output terminal of the recording / reproducing device.

(2R) is a right audio input / output jack to which a right audio signal is input or output. The hot side contact (2Rh) of the right audio input / output jack (2R) is a switch (5) of a switching circuit (6). And the cold side contact (2Rc) of the right audio input / output jack (2R) is grounded. Recording side fixed contact (5b) of this switch (5)
Is connected to the right audio signal input terminal of the recording / reproducing device, and the reproduction-side fixed contact (5c) of the switch (5) is connected to the right audio signal output terminal of the recording / reproducing device.

The recording / reproducing device (7) converts the left and right audio signals supplied to the left and right audio signal input terminals into a sum and difference signal of the left and right audio signals by a matrix circuit (not shown) at the time of recording. These are recorded on a magnetic tape together with video signals, and at the time of reproduction, the sum and difference signals of the left and right audio signals from the magnetic tape are converted into left and right audio signals by a matrix circuit, and these are output as left and right audio signals. In addition to the end, the sum signal of the left and right audio signals is supplied to the speaker (8b).

(9) is a switch circuit, which is a slide switch for sliding the movable contact (9a) to the left and right as shown by the arrow in the figure. When the movable contact (9a) of the switch circuit (9) is moved to the input side (leftward), the movable contacts (3a) and (3a) of the switches (3), (4) and (5) of the switching circuit (6) are moved. (Four
a) and (5a) are recording-side fixed contacts (3b), (4b), and (5b)
And the movable contact (9a) of this switch circuit (9)
Is moved to the output side (rightward), the movable contacts (3a), (3a) of the switches (3), (4), (5) of the switching circuit (6)
(4a) and (5a) are playback-side fixed contacts (3c), (4c), (5
It is configured to be connected to c).

Therefore, the video input / output jack (1) of this monitor television integrated VTR is connected to the video output jack of another VTR, and the left audio input / output jack (2L) of this monitor television integrated VTR is Connect the left audio output jack of another VTR to this monitor
VTR right audio input / output jack (2R) and other V
To connect the right audio output jack of the TR and record the reproduced video signal and the left and right audio signals from other VTRs on the magnetic tape of this monitor television integrated VTR, use the switch circuit (9). The movable contact (9a) may be slid to the input side (left side).

Thus, a reproduced video signal from another VTR connected to the monitor television integrated VTR is supplied to the recording / reproducing device (7) via the video input / output jack (1) and the switch (3). On the other hand, the reproduced left and right audio signals from the other VTRs are sent to the recording / reproducing device (7) via the left and right audio input / output jacks (2L) and (2R) and the switches (4) and (5), respectively. Supplied. These left and right audio signals are converted into a sum and difference signal of the left and right audio signals by a matrix circuit, modulated with a video signal, and recorded on a magnetic tape.

On the other hand, the recorded video signal is transmitted to a monitor (8
The sum signal and the difference signal of the recorded left and right audio signals are also supplied to the speaker (8b) and supplied to the speaker (8b) to be monitored.

When the video signal and the left and right audio signals reproduced by the monitor television integrated VTR and the received video and audio signals are supplied to another VTR and recorded on the magnetic tape of the VTR, the monitor television is used. Connect the video I / O jack (1) of the VTR and the video input jack of the other VTR, and connect the left audio I / O jack (2L) of the VTR and the left of the other VTR. Connect the audio input jack to this monitor television integrated type
VTR right audio input / output jack (2R) and other VTRs mentioned above
Connect the right audio input jack. Then, after the movable contact (9a) of the switch circuit (9) is slid to the output side (right side), and the recording / reproducing device (7) is set to the reproducing state or the receiving state, the monitor / television integrated VTR is provided. Playback video signal and playback left and right audio signals, or
The received video signal and the received audio signal are supplied to the other VTR, and are recorded on the magnetic tape of the VTR.

[Problems to be solved by the invention]

However, the above-mentioned I / O terminal device connects another VTR or the like to a monitor television integrated VTR to which the I / O terminal device is applied, and reproduces a reproduction signal from the other VTR. To the integrated VTR,
When a recording signal is recorded on a magnetic tape or a reproduction signal reproduced by this monitor television integrated VTR is supplied to another VTR and recorded on a magnetic tape of the other VTR, a switch circuit ( The movable contact (9a) of 9) must be manually switched between the input side and the output side, causing the user to feel troublesome. If the switching is erroneous, this VTR is integrated into another VTR.
There is a problem that the reproduced signal from the VTR is not recorded or the reproduced signal from another VTR is not recorded by the monitor television integrated VTR.

It is desired that the monitor television integrated VTR be as small as possible. However, if a switch circuit (9) having a movable contact (9a) of the above-described means is provided,
There is a disadvantage that this monitor television integrated VTR becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an input / output device capable of eliminating misuse of a user in a device in which the input / output terminal device is used, as well as simplifying the structure and reducing the size. It is intended to propose a shared terminal device.

[Means for solving the problem]

In order to solve the above problems, the present invention provides an input / output terminal device having the following means. That is, a control signal is generated based on the operation of the operation button, and in the input / output terminal device that automatically allocates a plurality of input / output terminals as input terminals or output terminals of the AV device by the control signal, A pair of input / output jack circuits selectively connected to a pair of audio signal input lines or a pair of audio signal output lines of the AV device, the first jack having a first signal output terminal and a ground terminal. A second input / output terminal), a second signal output terminal and an earth terminal, and an auxiliary terminal which is contact-connected to the second signal output terminal and disconnected from the second signal output terminal when the plug is inserted. A stereo audio signal jack circuit including two jacks (second input / output terminals) and a first signal output terminal of the first jack and an auxiliary terminal of the second jack are connected to form a second jack. A connection circuit configured to add signals from a pair of input / output jack circuits when a plug is not inserted into the jack (monaural); and an input connected to the connection circuit. A control circuit for detecting a change in input potential when the auxiliary terminal is disconnected from the signal output terminal of the second jack and notifying the AV device of the stereo connection mode, and an operation mode of the AV device A controller that controls the switching circuit based on the monaural or stereo connection mode detected by the control circuit to switch and connect the pair of input / output jack circuits to an input line or an output line of the AV device. And an input / output terminal device.

[Action]

According to the present invention described above, the allocating means (6) automatically sets the input / output terminals (1), (2L) and (2R) as input terminals or output terminals based on the control signal from the control means (11). , It is possible to simplify the configuration of the input / output terminal group and to reliably input or output signals.

〔Example〕

Hereinafter, an example in which the input / output terminal device of the present invention is applied to a monitor television integrated type VTR will be described in detail with reference to FIG. In FIG. 1, portions corresponding to FIG. 4 are denoted by the same reference numerals.

In FIG. 1, a hot-side contact (1) of a video input / output jack (1) to which a video signal is input or output is provided.
h) is connected to the movable contact (3) of the switch (3) of the switching circuit (6).
a) and ground the cold side contact (1c) of this video input / output jack (1). The recording-side fixed contact (3b) of the switch (3) is connected to a video signal input terminal of a recording / reproducing device (7) described later, and the reproduction-side fixed contact (3c) of the switch (3) is connected to the recording / reproducing device (7). ) Video signal output terminal.

The recording / reproducing device (7) converts a signal supplied to a video signal input terminal according to ON / OFF of a reproduction key (10P), a recording key (10L), and a stop key (10S) of the operation key group (10). The video signal is recorded on a magnetic tape or reproduced from a magnetic tape via a video signal output terminal. Also, the video signal supplied to the video signal input terminal is supplied to the monitor (8a) so that the video signal is displayed on the display section of the monitor (8a) or the monitor (8a) is supplied with a magnetic tape. The reproduced video signal is supplied, and the reproduced video signal is displayed on the display section of the monitor (8a). The recording / reproducing device (7) has a so-called TV tuner (not shown), receives a television signal from a broadcasting station via an antenna (not shown), and sends it to a monitor (8a). The received television signal is displayed on the display unit.

(2L) is a right audio input / output jack to which a left audio signal is input or output. The hot side contact (2Lh) of the left audio input / output jack (2L) is connected to a switch (4) of a switching circuit (6). And the cold side contact (2Lc) of this left audio input / output jack (2L) is grounded. The recording-side fixed contact (4b) of the switch (4) is connected to the left audio signal input terminal of the recording / reproducing device (7), and the reproducing-side fixed contact (4c) of the switch (4) is connected to the recording / reproducing device (7). To the left audio signal output terminal.

(2R) is a right audio input / output jack for inputting or outputting a right audio signal. The hot side contact (2Rh) of the right audio input / output jack (2R) is connected to a switch (5) of a switching circuit (6). And the cold contact (2Rc) of the right audio input / output jack (2R) is grounded. The recording-side fixed contact (5b) of the switch (5) is connected to the right audio signal input terminal of the recording / reproducing device, and the reproducing-side fixed contact (5c) of the switch (5) is connected to the right audio signal of the recording / reproducing device (7). Connect to the signal output terminal.

The recording / reproducing device (7) converts the left and right audio signals supplied to the left and right audio signal input terminals into a sum and difference signal of the left and right audio signals by a matrix circuit (not shown) at the time of recording. These are recorded on a magnetic tape together with video signals, and at the time of reproduction, the sum and difference signals of the left and right audio signals from the magnetic tape are converted into left and right audio signals by a matrix circuit, and these are output as left and right audio signals. In addition to the end, the sum signal of the left and right audio signals is supplied to the speaker (8b).

(11) is a controller that turns on the operation keys (10),
Each switch (3) of the switching circuit (6) based on the OFF state,
(4) and (5) are switched. That is, as shown in FIG. 2, when any one of the stop key (10s), the recording key (10r), and the reproduction key (10p) is turned on in the tuner mode, for example, the switching circuit (6) Switches (3), (4) and (5)
a), (4a) and (5a) are replaced with fixed contacts (3c), (4
Connect to c) and (5c).

As a result, the video and audio signals received by the tuner of the recording / reproducing device (7) are converted into the switch (3), the switches (4) and (5), and the video input / output jack (1).
In addition, it is supplied to an external device via a left audio input / output jack (2L) and a right audio input / output jack (2R).

When one of the stop key (10s) and the recording key (10r) is turned on in the line mode, each of the switches (3) and (3) of the switching circuit (6) is turned on.
The movable contacts (3a), (4a) and (5) of (4) and (5)
Connect a) to each input side fixed contact (3b), (4b) and (5b). Thus, the video input / output jack (1), the left audio input / output jack (2L) and the right audio input / output jack (2R), the switch (3), and the switches (4) and (5) The supplied video signal and left and right audio signals are supplied to the recording / reproducing device (7).

When the reproduction key (10p) is turned on in the line mode, the movable contacts (3a), (4a) of the switches (3), (4) and (5) of the switching circuit (6) are turned on. )
And (5a) are replaced with the fixed contacts (3c), (4c) and (5
Connect to c). As a result, the reproduced video signal and the reproduced left and right audio signals reproduced by the recording / reproducing device (7) are switched by the switch (3) and the switch (4)
And (5), supplied to an external device via a video input / output jack (1), a left audio input / output jack (2L) and a right audio input / output jack (2R).

Also, for example, the above-described monitor television integrated VTR
In the case where a camera is provided and a camera mode for taking a picture with the camera is newly provided, the operation is as follows. That is, the stop key (10
s), when any one of the recording key (10r) and the reproduction key (10p) is turned on, each of the switches (3), (4) and (5) of the switching circuit (6) is movable. Contact (3
a), (4a) and (5a) are replaced with fixed contacts (3c), (4
Connect to c) and (5c). by this,
A photographed video signal and a left and right audio signal from a camera (not shown) are switched (3) and switch (4).
And (5), supplied to an external device via a video input / output jack (1), a left audio input / output jack (2L) and a right audio input / output jack (2R).

As is apparent from the above description, the user does not need to manually switch the input / output terminal to the input terminal or the output terminal each time, so that there is no erroneous use and the small size of this monitor television integrated VTR. Can be achieved.

FIG. 3 shows another example in which the input / output terminal device of the present invention is applied to a monitor television integrated type VTR. In FIG. 3, parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 3, the input / output terminal device described with reference to FIG. 1 is further adapted to automatically determine whether the audio signal is monaural or stereo. That is, arranged condenser C _1, C ₂ and C ₃ between the fixed contacts of the hot-side contact of the left audio input-output jacks (2L) (2Lh) and a switch (4) (4a), further a capacitor C ₂ and C one end of the resistor R ₁ is connected between ₃ and grounding the other end.

On the other hand, a capacitor C ₄ is arranged between the hot contact (2Rh) of the right audio input / output jack (2R) and the movable contact (5a) of the switch (5), and further, the hot contact (2Rh) and the capacitor C ₄ one end of the resistor R ₂ connected between grounds the other end.

A new contact (2Rp) is provided for the right audio input / output jack (2R). The contact (2Rp) is opened when a plug is inserted into the right audio input / output jack (2R). And this contact (2R
It connects the input terminal of the p) and the control circuit (12), further connects the connection midpoint, and the contact capacitor C ₁ and C ₂ (2Rp).

To describe the control circuit (12), contacts the aforementioned (2Rp) and the transistor resistor between the bases of Q ₁ R ₃ and R
₅ through the connecting and grounding the emitter of the transistor Q _1, to connect the the collector and a power source + B The transistor Q ₁ via the resistor R _6. Then, a connection between the connection point of the power supply + B and the resistor R ₃ and R ₅ through a resistor R _4,
The resistance midpoint of the resistors R ₃ and R ₅ is grounded via a capacitor C _5. The output terminal of the control circuit (12), i.e., the collector and the recording and reproducing apparatus of the transistor Q ₁ (7)
Connect the input terminals of

If the base voltage is Vx, the resistance values of the resistors R _{1 to} R ₃ are r _{1 to} r _3, and the voltage of the power supply + B is + b, this voltage Vx is a voltage that does not turn on the transistor Q ₁ , That is, And

When the plug is not inserted in this case right audio input-output jacks (2R), a resistor R _1, since the bias is lowered with respect to the transistor Q _1, the transistor Q ₁
Is turned off, and the detection signal supplied to the recording / reproducing device (7) is at a high level. Also, when the plug is inserted into the right audio input / output jack (2R),
Since bias due resistor R ₃ is subjected to the base of the transistor Q _1, the transistor Q ₁ is turned on,
Therefore, the detection signal supplied to the recording / reproducing device (7) is at a low level.

When monaural audio is handled, in this case, a plug should be inserted into the left audio input / output jack (2L).

With the configuration described above, the stop key (10s) and the recording key (1) are set in the tuner mode as described with reference to FIG.
0r) and the play key (10p) are turned on, the play key (10p) is turned on in the line mode, the stop key (10s) and the recording key (10
r), when one of the play keys (10p) is turned on,
First, when the plug is inserted only into the left audio input / output jack (2L), that is, when the plug is not inserted into the right audio input / output jack (2R), the recording / reproducing device (7) Based on the high-level detection signal from the control circuit (12), it is determined that a monaural audio signal is to be output, and the sum signal of the left audio signal and the right audio signal is output via the switch (4) and the left audio input / output jack (2L). To external equipment.

When plugs are inserted into the left and right audio input / output jacks (2L) and (2R), respectively, that is, when plugs are inserted into the right audio input / output jack (2R), recording and reproduction are performed. The device (7) determines that the stereo audio signal is output based on the low-level detection signal from the control circuit (12), and switches the left and right audio signals to the switches (4) and (5) and the left and right audio input, respectively. It is supplied to external equipment via output jacks (2L) and (2R).

On the other hand, when the stop key (10s) or the recording key (10r) is turned on in the line mode, first, when the plug is inserted only in the left audio input / output jack (2L), the recording / reproducing device ( 7) determines that a monaural audio signal is input based on a high-level detection signal from the control circuit (12), and outputs a sum signal of the left and right audio signals from the outside, for example, a monaural signal at the time of recording. ID indicating that there is
A signal or the like is added and recorded on a magnetic tape.

When the left and right audio input / output jacks (2L) and (2R) are plugged in, respectively, the recording / reproducing device (7) outputs a stereo signal by a low level detection signal from the control circuit (12). When it is determined that an audio signal is supplied, for example, at the time of recording, the left and right audio signals supplied from the outside are converted into a sum and difference signal of the left and right audio signals by a matrix circuit (not shown), The sum and difference signals of the left and right audio signals are recorded on a magnetic tape.

As is apparent from the above description, the input / output terminal is automatically assigned as the input and output terminals, and further, whether the audio signal to be handled is monaural or stereo is automatically detected, and the processing according to the detection result is performed by the recording / reproducing apparatus. Since the method (7) is performed, the user does not feel troublesome, and it is possible to prevent the user from erroneously using the monitor television integrated VTR.

In the above-described embodiment, the monitor television integrated type VTR has been described, but the monitor, the VTR, and the tuner may be separated.

In addition, the present invention is not limited to the above-described embodiment, and may adopt various other configurations without departing from the gist of the present invention.

According to the present invention described above, the allocating means automatically allocates the input / output terminal as the input terminal or the output terminal based on the control signal from the control means. There is an advantage that the configuration can be simplified and signal input or output can be performed reliably. Also,
Plug detecting means for automatically detecting monaural or stereo at the left and right audio input / output terminals (control circuit 12 in FIG. 3)
Is provided, there is an advantage that misuse can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example 1 in which the input / output terminal device of the present invention is applied to a monitor television integrated type VTR, FIG. 2 is an explanatory diagram showing input / output determination by a signal mode and an operation mode, and FIG. FIG. 4 is a configuration diagram showing an example 2 in which the input / output terminal device of the present invention is applied to a monitor television integrated VTR, and FIG. 4 is a configuration showing an example in which the conventional input / output terminal device is applied to a monitor television integrated VTR. FIG. (1) is a video input / output jack, (2L) is a left audio input / output jack, (2R) is a right audio input / output jack,
(6) is a switching circuit, (10) is an operation key group, and (11) is a controller.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-213803 (JP, A) JP-A-61-131980 (JP, A) JP-A-62-141294 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) G11B 5/027 G11B 20/00 H04N 5/225

Claims (1)

(57) [Claims] An input / output terminal device for generating a control signal based on an operation of an operation button and automatically allocating a plurality of input / output terminals as input terminals or output terminals of AV equipment according to the control signal. A pair of input / output jack circuits selectively connected to a pair of audio signal input lines or a pair of audio signal output lines of the AV device, the first having a first signal output terminal and a ground terminal. In addition to a jack (first input / output terminal), a second signal output terminal and a ground terminal, the second signal output terminal is contact-connected to the second signal output terminal and the plug is inserted into the second signal output terminal.
A second terminal having an auxiliary terminal that is disconnected from the signal output terminal;
A jack circuit for a stereo audio signal including a jack (second input / output terminal) and a first signal output terminal of the first jack and an auxiliary terminal of the second jack are connected, and a plug is connected to the second jack. A connection circuit configured to add signals from a pair of input / output jack circuits when not inserted (monaural); and an input connected to the connection circuit. A control circuit for detecting a change in input potential when the auxiliary terminal is disconnected from the second signal output terminal of the second jack and notifying the AV device of a stereo connection mode; an operation mode of the AV device and the control The switching circuit is controlled based on the monaural or stereo connection mode detected by the circuit to disconnect the pair of input / output jack circuits to the input line or output line of the AV device. Input-output terminal device and a controller connected.