JPH089955Y2 - TV door horn device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door horn device having a television camera, and in particular, operating a talk switch of a parent device to monitor the field of view of the television camera on a television screen for a required time and to display a child device. The present invention relates to a TV door horn device which enables a conversation with the user.

[0002]

2. Description of the Related Art Today, in a door horn device in which a main unit is installed indoors, a slave unit is installed outdoors, etc., and a visitor or the like is notified of a visit by operating a button on the slave unit, a microphone or a speaker is used for the slave unit. Not only that, but there is also one that has a built-in TV camera so that the face and figure of the visitor can be shown on the indoor monitor TV for conversation.

In the door horn device having the slave unit with the built-in television camera, when the push button of the slave unit is operated, the speaker of the master unit emits a chime sound and the slave unit is operated for a short time. Show the field of view of the TV camera installed on the slave unit on the monitor TV and operate the talk switch on the master unit to activate the macrophone installed on the master unit and check the screen on the monitor TV to have a conversation with the slave unit. There is something that makes it possible.

An example of a circuit of such a door horn device is, for example, as shown in FIG. 4, a microphone 21 and an audio modulation circuit 23, a speaker 25 and an audio demodulation circuit 2 in a base unit 20.
7. The push button 11 of the handset 10 is operated, including the monitor / relay device 31, the monitor power supply circuit 33, the constant current circuit 35, the timer circuit 45, the talk switch 41, and the call detection circuit 37. When the ringing detection circuit 37 is detected, the first timer-46 of the timer circuit 45 is operated to operate the monitor power supply circuit 23 and the constant current circuit 35 for a short time, for example, 30 seconds, and thus the slave unit. The sound collected by the microphone 13 of 10 is the master device 20.
When a sound is produced from the speaker 25 and the field of view of the television camera 17 of the child device 10 is projected on the screen of the monitor television device 31 provided in the parent device 20 and the talk switch 41 is operated, the timer is displayed. -The second timer-47 of the circuit 45 is operated, the monitor power supply circuit 23 and the constant current circuit 35 are operated for a required time such as 3 minutes, and the voice modulation circuit 23 is also activated, and the microphone of the master device 20 is activated. The speaker 15 of the slave unit 10 can be made to output the sound to be collected by the speaker 21, and the two-way conversation between the master unit 20 and the slave unit 10 can be performed for the required time while checking the indoors on the screen of the monitor TV device 31. It is what

[0005]

A door switch for starting a microphone, a speaker, a monitor television set, etc. of the master unit by activating a power supply circuit such as a constant current circuit for a required time by the talk switch of the master unit. The device is in a state in which two-way conversation is possible for the time specified by the timer, and when the conversation becomes long, the voice and images disappear when the time specified by the timer elapses, The talk switch had to be operated again to continue the conversation, and there was a drawback that the image and voice were suddenly cut off and the conversation was interrupted.

[0006]

Means for Solving the Problems A switch detection circuit for detecting the operation of a talk switch, and a reset when a time notice signal is output when the switch detection circuit detects the operation of the talk switch. It outputs a signal and outputs a start signal when the timing warning signal is not output, and an operation command signal for activating the power supply circuit by the start signal or the timing end pulse signal from the timing circuit. A command output circuit that starts or stops output and outputs an operation end pulse signal when the operation command signal output is stopped, and a circuit that outputs a time end pulse signal by measuring the required time from the output of the operation command signal. , A second timing circuit that outputs a timekeeping warning signal before the required time elapses and restarts the timekeeping of the required time from the beginning by the reset signal output from the determination circuit. - it to be provided as.

[0007]

[Operation] A door horn device according to the present invention is a timer for determining a talk time, a switch detection circuit for outputting a switch signal when a talk switch is operated, and a start signal based on the switch signal. Or, it has a discriminator that outputs a reset signal and a command circuit that outputs an operation command signal for operating the power supply circuit, etc. by a start signal. The circuit can be activated to activate a monitor television device, a microphone, an audio modulation circuit, and the like.

When the timekeeping circuit is outputting the timekeeping notice signal, the switch detection circuit has a discriminating circuit which detects the operation of the talk switch and outputs a reset signal in response to the switch signal. Since the timing circuit for restarting the timing by the reset signal is provided, the talk time can be extended by operating the talk switch.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 4, the embodiment of the door horn device according to the present invention includes a microphone 21, a voice modulation circuit 23, a speaker 25 and a voice demodulation circuit 27 in a base unit 20.
A monitor television device 31, a monitor power supply circuit 33, a constant current circuit 35, a call detection circuit 37, a talk switch 41,
Further, it is a door horn device having a timer circuit 45,
As shown in FIG. 1, the second timer 47 used in the timer circuit 45 of this door horn device detects that the talk switch 41 is operated and outputs a switch signal to the B signal. Switch detection circuit 50, which outputs a start signal to the C signal when this switch signal is input, or a discrimination circuit 60 which outputs a reset signal to the D signal, and G signal when the start signal is input Command output circuit 7 for starting or stopping the output of the operation command signal to and outputting the operation end pulse signal to the I signal when the output of the operation command signal is stopped
0, when the operation command signal is output to the G signal from the command output circuit 70, the time measurement is started, and when the elapsed time is measured, the time is F
A time counting circuit 80 that outputs a time counting end pulse signal to a signal and outputs a time counting advance notice signal to an E signal for a predetermined time before outputting the time counting end pulse signal, and turns on a lamp when the operation command signal is output, It comprises a lighting circuit 90 which blinks the lamp when the timekeeping notice signal is inputted.

In this switch detection circuit 50, as shown in FIG. 2, one end of a capacitor 51 provided in parallel with the talk switch 41 is connected to an H level power source via a resistor 53, and the capacitor 51 and the resistor 53 are connected. Is connected to the first pulse generator 57 via the first inverter 55, and the output terminal of the first pulse generator 57 is connected as an output terminal of the switch detection circuit 50 to the discrimination circuit 60 described later. It is a thing.

Therefore, when the talk switch 41 is operated, the switch detection circuit 50 discharges the electric charge accumulated in the capacitor 51, and the connection point with the resistor 53 becomes the L level, and the first inverter. The output of 55 becomes the H level, and the first pulse generator 57 outputs the H pulse,
The first pulse generator 57 outputs a single H pulse as a switch signal to the B signal every time the talk switch 41 is operated.

Discrimination circuit 6 to which this switch signal is input
0 is composed of one inverter and two AND circuits,
The output terminal of the first pulse generator 57 in the switch detection circuit 50 is connected to the respective input terminals of the first AND circuit 63 and the second AND circuit 65, and the timing notification signal output terminal of the timing circuit 80 described later is used as the second AND circuit. 65 and another input terminal of the first AND circuit 63 via the second inverter 61, and the output terminal of the first AND circuit 63 is used as a start signal output terminal. Output circuit 7
0, the output terminal of the second AND circuit 65 is connected to the clock circuit 80 as a reset signal output terminal.

Therefore, the discriminating circuit 60 is comprised of the clock circuit 8
When the H-level time advance notice signal is not output from 0 to the E signal, the second AND circuit 65 is closed and the first AND circuit 63 is opened to allow the switch signal output to the B signal to pass, so that C A H pulse start signal is output as a signal, and when the H level timing advance notice signal is output as an E signal, the first AND circuit 63 is closed and the second AND circuit 65 is opened to switch the switch. The signal is passed through the D signal, and the H pulse reset signal is output as the D signal.

The command output circuit 70 to which the start signal is input is composed of one OR circuit, a D-flip-flop, a pulse generator, an AND circuit and a latch circuit, and a first OR circuit 71. The discrimination circuit 6 is provided at the input terminal of
The output terminal of the first AND circuit 63 at 0 and the time end pulse signal output terminal of the time counting circuit 80 described later are connected, and the output terminal of the first OR circuit 71 is connected to the clock input terminal of the D-flip-flop 73. And the input terminal of the third AND circuit 77, the D-flip-flop 73
Is connected to the input terminal of the second pulse generator 75, the output terminal of the second pulse generator 75 is connected to the timing circuit 80 as the operation end pulse signal output terminal, and the first in the command output circuit 70 is connected. The third AND circuit 77 is connected to the reset terminal of the latch circuit 79 and the reset terminal of the D-flip-flop 73, and the other input terminal of the third AND circuit 77 is connected to the inverted Q output terminal of the D-flip-flop 73. The output terminal of the circuit 77 is connected to the input terminal of the first latch circuit 79, and the output terminal of the first latch circuit 79 is used as an operation command signal output terminal to serve as a clock circuit 80, a lighting circuit 90, a voice modulation circuit 23, and a monitor described later. While being connected to the power supply circuit such as the power supply circuit 23 and the constant current circuit 35,
It is connected to the D input terminal of the D-flip-flop 73 in the command output circuit 70.

Therefore, when the start signal of the H pulse is output from the discriminating circuit 60 as the C signal, the command output circuit 70 passes the H pulse through the first OR circuit 71 and the third AND circuit 77. The signal is input to the first latch circuit 79, the G signal output from the first latch circuit 79 is set to the H level, and the operation command signal is output as the G signal. This operation command signal is sent to the lighting circuit 90, the timing circuit 80, the monitor power supply circuit 33, the constant current circuit 35, and the audio modulation circuit 23, and also to the D input terminal of the D-flip-flop 73 in the command output circuit 70. Since they are connected, when a pulse signal is input to the clock input terminal of the D-flip-flop 73 via the first OR circuit 71 while the operation command signal is being output from the first latch circuit 79, D- The flip-flop 73 sets the Q output to the H level, outputs the operation end pulse signal to the I signal from the second pulse generator 75, resets the first latch circuit 79, returns the G signal to the L level, and outputs it to the G signal. The output of the activated operation command signal is stopped, and the D-flip-flop 73 is also reset to return to the initial state.

Further, the time counting circuit 80 to which the operation command signal and the operation end pulse signal are inputted is composed of one OR circuit and a latch circuit, two AND circuits, a pulse counter and a pulse generator. The clock circuit 80 connects the output terminal of the first latch circuit 79 that outputs the operation command signal to the φ of the first pulse counter 82 via the fourth AND circuit 81.
Connect to the input terminal and the input terminal of the fifth AND circuit 83,
The other input terminal of the fourth AND circuit 81 has a reference frequency signal φ.
1 output terminal is connected, and the T signal output terminal of the first pulse counter 82 is the fifth AND circuit 83 and the third pulse generator 8
5, the output terminal of the fifth AND circuit 83 is connected to the φ input terminal of the second pulse counter 84, and the T signal output terminal of the second pulse counter 84 is connected to the fourth pulse generator 86. The output terminal of the generator 86 is connected to the first OR circuit 71 of the command output circuit 70 as the time counting end pulse signal output terminal, and the output terminal of the third pulse generator 85 is connected to the second latch circuit 87. 2 The determination circuit 6 uses the output terminal of the latch circuit 87 as the time notice signal output terminal.
Second inverter 61 and second AND circuit 65 at 0
And a lighting circuit 90 described later, and further, an output terminal of the second AND circuit 65 in the determination circuit 60 which is a reset signal output terminal, and a second pulse in the command output circuit 70 which is an output terminal of the operation end pulse signal. The output terminal of the generator 75 is connected to the first pulse counter 82, the second pulse counter 84, and the second latch circuit 8 via the second OR circuit 88.
7 is connected to each reset terminal.

The first pulse counter 82 counts the number of pulses of the reference frequency signal φ1, and when it counts, for example, 3 minutes, the T output becomes H level, and the second pulse counter 84.
When the reference frequency signal φ1 is counted and, for example, 30 seconds are counted, the T output is set to H level. Therefore,
This time counting circuit 80 opens the fourth AND circuit 81 when the H level operation command signal is output from the command output circuit 70, inputs the reference frequency signal φ 1 to the first pulse counter 82, and after 3 minutes, outputs the first pulse. When the counter 82 sets the T output to the H level, the third pulse generator 85 outputs the H pulse, and the H pulse causes the output of the second latch circuit 87 to change to the H level.
It becomes a level and outputs a timing notice signal from the timing circuit 80 to the determination circuit 60 and the lighting circuit 90, and also opens the fifth AND circuit 83 to output the reference frequency signal φ1 via the fourth AND circuit 81 to the second pulse counter. When the T output of the second pulse counter 84 reaches the H level after 30 seconds, the H pulse is output from the fourth pulse generator 86 to the F signal and the time measurement ends. It is sent to the command output circuit 70 as a pulse signal.

The present embodiment has a lighting circuit 90 for giving notice of interruption of a call. The lighting circuit 90 is composed of a NAND circuit, an AND circuit, an operational amplifier, a light emitting diode and a protection resistor. The input terminal of the NAND circuit 91 is connected to the output terminal of the second latch circuit 87 in the timing circuit 80, and the other input terminal of the NAND circuit 91 is connected to the output terminal of the reference frequency signal φ2 of 1 Hz, for example. , The output terminal of the NAND circuit 91 is connected to the input terminal of the sixth AND circuit 93, and the other input terminal of the sixth AND circuit 93 is connected to the output terminal of the first latch circuit 79 in the command output circuit 70. The output terminal of the circuit 93 is
Lamps such as the tional amplifier 95 and the light emitting diode 97,
And a protection resistor 99, and is connected in series to the L level power supply.

Therefore, in the lighting circuit 90, the NAND circuit 9 is used when the H-level time advance notice signal is not input.
When the J signal which is the output of No. 1 is held at the H level and the command output circuit 70 outputs the operation command signal of the H level to the G signal, the output of the sixth AND circuit 93 becomes the H level and the light emitting diode. When a lamp such as 97 is turned on and the timing advance notice signal is input to the lighting circuit 90, the J signal which is the output of the NAND circuit 91 becomes a pulse signal based on the reference frequency signal φ 2 of 1 Hz, and the light emitting diode is activated. 97 will blink.

As described above, in this embodiment, since the second timer 47 is composed of the switch detection circuit 50, the discrimination circuit 60, the command output circuit 70, the time counting circuit 80 and the lighting circuit 90, the switch detection circuit 50 operates as follows. When the operation of the switch 41 is detected and the H pulse switch signal is output to the B signal, the H pulse passes through the first AND circuit 63 in the discrimination circuit 60 and is output to the C signal as the H pulse start signal. The H pulse passes through the first OR circuit 71 and the third AND circuit 77 in the command output circuit 70 and is latched by the first latch circuit 79, and the command output circuit 70 outputs the H level operation command signal to the G signal. Will be.

As described above, when the operation command signal is output by operating the talk switch 41, the lighting circuit 90 lights the light emitting diode 97, and the time counting circuit 80.
The first pulse counter 82 in FIG.
Based on the above, the timing advance notice signal is output after 3 minutes, the second pulse counter 84 is caused to start the timing, and the first AND circuit 63 in the determination circuit 60 is closed to open the second AND circuit 65, Moreover, the light emitting diode 97 in the lighting circuit 90 is caused to blink.

As described above, when the timekeeping notice signal is output from the timekeeping circuit 80 and the talk switch 41 is operated again while the lamp such as the light emitting diode 97 is blinking, the switch detection circuit 50 outputs the B signal. The H-pulse switch signal to be output passes through the second AND circuit 65 in the determination circuit 60 and is output as the D signal as a reset signal, and the first pulse counter 82, the second pulse counter 84, and the second latch in the time counting circuit 80. It is possible to reset the circuit 87, stop the output of the timing advance notice signal output from the second latch circuit 87, and cause the first pulse counter 82 to again count the time for 3 minutes.

When the second pulse counter 84 measures that 30 seconds have elapsed since the timing advance notice signal was output from the timing circuit 80, the fourth pulse generator 86 outputs a timing end pulse signal to output a command. D- in circuit 70
The flip-flop 73 sets its Q output to the H level, and the second pulse generator 75 outputs the operation end pulse signal of the H pulse to the I signal so that the first pulse counter 82, the second pulse counter 84, and the A circuit for resetting the second latch circuit 87, resetting the first latch circuit 79 and the D-flip-flop 73 in the command output circuit 70, stopping the output of the operation command signal, and returning the second timer-47 to the initial state. Therefore, after the operation command signal is output, before the timing warning signal is output, the
Even when the switch 41 is operated, the start signal from the determination circuit 60 is input to the command output circuit 70, and the output of the operation command signal can be stopped to return the second timer 47 to the initial state.

[0024]

The door horn device according to the present invention includes a switch detecting circuit as a second timer for detecting the operation of the talk switch and outputting a switch signal, and a start signal for the switch signal. Alternatively, a determination circuit that outputs as a reset signal, a command output circuit that outputs an operation command signal to a power supply circuit such as a monitor power supply and a constant current circuit by a start signal, and start timing with the output of the operation command signal, Outputs a timing end pulse signal that stops the output of the operation command signal after the required time, and outputs a timing advance notice signal for a predetermined time before the timing end pulse signal is output, and starts the timing of the required time by the reset signal. Since it has a timekeeping circuit that operates from the above, when the talk time becomes long, the talk time can be extended by operating the talk switch, and communication with the slave unit can be performed. It can be prevented from being cut off the call in.

[Brief description of drawings]

FIG. 1 is a second view of the second embodiment incorporated in the door horn device according to the present invention.
The block diagram of a timer.

FIG. 2 is a second part incorporated in the door horn device according to the present invention.
The figure which shows the implementation circuit example of a timer.

FIG. 3 is a second part incorporated in the door horn device according to the present invention.
The time chart which shows each signal in the circuit of the timer.

FIG. 4 is a block diagram showing a circuit example of the entire door horn device.

[Explanation of symbols]

10 Slave Unit 20 Master Unit 31 Monitor Television 33 Power Supply for Monitor 35 Constant Current Circuit 41 Talk Switch 45 Timer Circuit 47 Second Timer 50 Switch Detection Circuit 60 Discrimination Circuit 70 Command Output Circuit 80 Timing Circuit 90 Lighting Circuit

Claims (1)

[Scope of utility model registration request] 1. A master unit installed indoors and a slave unit installed outdoors, and a timer is set when a push button on the slave unit and a talk switch on the master unit are operated. In a door horn device having a power supply circuit that operates for a required time, a switch detection circuit that outputs a switch signal by detecting the operation of a talk switch, and a start signal when the switch signal is input Alternatively, when a determination circuit that outputs either a reset signal and a start signal output from the determination circuit or a timing end pulse signal from the timing circuit is input, the operation command signal is alternately started or stopped and A command output circuit that outputs an operation end pulse signal when the output of the operation command signal is stopped, and the operation command signal is detected to start the time measurement of the required time, and after the required time the time measurement end pulse It has a timing circuit that outputs a signal and outputs a timing warning signal for a predetermined time before the timing end pulse signal is output, and when the reset signal is input, measures the required time again from the beginning. , When the timing warning signal is input, the reset signal is output by the switch signal input, and when the timing warning signal is not input, the start signal is output by the switch signal input. A TV door horn device characterized in that a power supply circuit is operated by an operation command signal.