JPH0539057U - TV door horn device - Google Patents

Abstract

(57) [Summary] [Purpose] In a door horn device that operates a button on the base unit to talk with the handset for the required time, keeps the call with the handset uninterrupted during a call. A switch detection circuit 50 for detecting the operation of the talk switch 41, and a discrimination circuit 60 for making the output of the switch detection circuit 50 a start signal or a reset signal,
A command output circuit 70 that outputs an operation command signal by a start signal, and a reset signal that repeatedly measures the required time to output a timing end pulse signal after the timing ends, and a timing advance notice before the timing end pulse signal is output. A timing circuit 80 that outputs a signal and a lighting circuit 90 that blinks a lamp according to a timing notification signal are provided, and the output of the operation command signal from the command output circuit 70 is stopped by the timing end pulse signal,
The operation command signal activates the power circuit of the door horn.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door horn device having a television camera, and in particular, by operating the toque switch of the parent device, it is possible to have a conversation with the child device while monitoring the view of the television camera on the television screen for a required time. It is related to the TV door horn device.

[0002]

[Prior Art]

 Today, in the door horn device where the main unit is installed indoors, the slave unit is installed outdoors, etc., and the visitor etc. informs of the visit by operating the buttons of the slave unit, not only the microphone and the speaker but also the TV camera is installed in the slave unit. There is also a built-in monitor that allows visitors to have conversations by displaying the faces and figures of the visitors on the indoor monitor TV.

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 in the slave unit on the monitor TV and operate the talk switch of the master unit to activate the macrophone installed in the master unit and check the screen of the monitor TV while talking with the slave unit. There is something that makes it possible.

A circuit example of such a door horn device is, for example, as shown in FIG. 4, in the master device 20, a microphone 21 and an audio modulation circuit 23, a speaker 25 and an audio demodulation circuit 27, and a monitor / relay device 31. In addition to the monitor power supply circuit 33, the constant current circuit 35, a timer circuit 45, a talk switch 41 and a call detection circuit 37, the call detection circuit 37 indicates that the push button 11 of the handset 10 has been operated. When it 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 only for a short time such as 30 seconds, so that the microphone of the handset 10 is activated. An image of the monitor television device 31 provided in the master device 20 in which the sound picked up by the speaker 13 is sounded from the speaker 25 of the master device 20 and the view of the TV camera 17 of the slave device 10 is captured in the master device 20. When the token switch 41 is operated, the second timer 47 of the timer circuit 45 is activated to turn on the monitor power supply circuit 23 and the constant current circuit 35 for a required time such as 3 minutes. In addition to the operation, the sound modulation circuit 23 is also activated so that the sound collected by the microphone 21 of the master device 20 can be generated from the speaker 15 of the slave device 10 by the screen of the monitor TV device 31. The two-way conversation between the master device 20 and the slave device 10 can be performed for the required time while confirming.

[0005]

[Problems to be solved by the device]

 The door horn device that activates the microphone, speaker, monitor TV device, etc. of the master unit by operating the power supply circuit such as the constant current circuit for a required time by the talk switch of the master unit is set by the timer. It allows two-way conversation for a specified time.When the conversation becomes long, the voice and image disappear after the time specified by the timer elapses, and the talk switch is operated again. They had to continue the conversation again, and suddenly the images and sounds were cut off and the conversation was interrupted.

[0006]

[Means for Solving the Problems]

 A switch detection circuit that detects the operation of the talk switch and a reset signal are output when the time signal is output when the switch detection circuit detects the operation of the talk switch, and the time notification signal is output. Is not output, the judgment circuit that outputs a start signal and the output of the operation command signal that operates the power supply circuit by the start signal or the timing end pulse signal from the timing circuit are started or stopped to operate. A command output circuit that outputs an operation end pulse signal when the instruction signal output is stopped, and a circuit that outputs a time end pulse signal after measuring the required time from the output of the operation command signal. A second timer is provided with a timing circuit that outputs a timing notification signal to the terminal and restarts timing of the required time from the beginning by the reset signal output from the determination circuit. That.

[0007]

[Operation] The door horn device according to the present invention, as a timer for determining a talk time, is a switch detection circuit that outputs a switch signal when a toque switch is operated, and a start based on the switch signal. Operation of the talk switch because it has a discriminating device that outputs a signal or a reset signal, and a command circuit that outputs an operation command signal for operating the power supply circuit etc. by the start signal. With this, the power supply circuit can be activated, and the monitor television device, the microphone, the voice modulation circuit, etc. can be activated.

Further, when the timing circuit outputs the timing notification signal, the switch detection circuit has a determination circuit that outputs a reset signal by a switch signal that detects the operation of the talk switch and outputs the signal. Since the time counting circuit for restarting the time counting from the reset signal is provided, the talk time can be extended by operating the talk switch.

[0009]

【Example】

 The embodiment of the door horn device according to the present invention is, as shown in FIG. 4, a microphone 21 and an audio modulation circuit 23, a speaker 25 and an audio demodulation circuit 27, a monitor TV device 31 and a monitor in the master device 20. A door horn device having a power supply circuit 33, a constant current circuit 35, a call detection circuit 37, a talk switch 41, and a timer circuit 45, which is used in the timer circuit 45 of the door horn device. As shown in FIG. 1, the second timer 47 which is present detects the operation of the talk switch 41 and outputs a switch signal to the B signal. The switch detection circuit 50 receives this switch signal. A discrimination circuit 60 that outputs a start signal to the C signal or a reset signal to the D signal, and when the start signal is input, starts or stops the output of the operation command signal to the G signal. line A command output circuit 70 that outputs an operation end pulse signal to the I signal when the output of the operation command signal is stopped. When the operation command signal is output to the G signal from the command output circuit 70, time counting is started and the elapsed time is measured. Then, the timing end pulse signal is output to the F signal, and the timing circuit 80 outputs the timing advance notice signal to the E signal for a predetermined time before the timing end pulse signal is output, and the ramp circuit when the operation command signal is output. And a lighting circuit 90 for turning on the lamp and blinking the lamp when the timing advance notice signal is input.

As shown in FIG. 2, the switch detection circuit 50 includes one end of a capacitor 51 arranged in parallel with the talk switch 41, which is connected to an H level power source via a resistor 53, and the capacitor 51 and the resistor 51. The connection point to the generator 53 is connected to the first pulse generator 57 via the first inverter 55, and the output terminal of the first pulse generator 57 is used as the output terminal of the switch detection circuit 50 to make a discrimination circuit 60 described later. To connect to.

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

The determination circuit 60 to which the switch signal is input is composed of one inverter and two AND circuits, and the output terminal of the first pulse generator 57 in the switch detection circuit 50 is connected to the first AND circuit. The input terminal of the circuit 63 and the second AND circuit 65 is connected to each other, and the timing notice signal output terminal of the timing circuit 80 described later is connected to the other input terminal of the second AND circuit 65 and the second inverter 61 is connected. To the other input terminal of the first AND circuit 63, the output terminal of the first AND circuit 63 is used as a start signal output terminal to the command output circuit 70, and the output terminal of the second AND circuit 65 is reset signal. It is connected to the clock circuit 80 as an output terminal.

Therefore, the discrimination circuit 60 closes the second AND circuit 65 and opens the first AND circuit 63 to open the B signal when the time circuit 80 does not output the H level time notice signal to the E signal. When the H-level start signal is output to the E signal, the first AND circuit is used to output the H-pulse start signal to the C signal. 63 is closed and the second AND circuit 65 is opened to pass the switch signal to the D signal and output the H pulse reset signal to 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. The input terminal of 71 connects the output terminal of the first AND circuit 63 in the discrimination circuit 60 and the output terminal of the timing end pulse signal of the timing circuit 80 described later, and the output of the first OR circuit 71 The terminal is connected to the clock input terminal of the D-flip-flop 73 and the input terminal of the third AND circuit 77, and the Q output terminal of 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 an operation end pulse signal output terminal, and the reset terminal and the reset terminal of the first latch circuit 79 in the command output circuit 70 are connected. The other input terminal of the third AND circuit 77 is connected to the reset terminal of the D-flip-flop 73, and the inverted Q output terminal of the D-flip-flop 73 is connected to the output terminal of the third AND circuit 77. The output terminal of the first latch circuit 79 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. The timing circuit 80, the lighting circuit 90, the sound modulation circuit 23, the monitor power supply circuit 23, and the constant current It is connected to a power supply circuit such as the circuit 35 and 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 1 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 the D input of the D-flip-flop 73 in the command output circuit 70. Since a pulse signal is input to the clock input terminal of the D-flip-flop 73 via the first OR circuit 71 when the operation command signal is output from the first latch circuit 79 because it is connected to the terminal. , D-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, and returns the G signal to the L level to return to the G level. The output of the operation command signal output as the signal is stopped, and at the same time, the D-flip-flop 73 is also reset to return to the initial state.

Further, the clock circuit 80 to which the operation command signal and the operation end pulse signal are input is composed of one OR circuit and a latch circuit, two AND circuits, a pulse counter and a pulse generator. The timing circuit 80 connects the output terminal of the first latch circuit 79, which outputs the operation command signal, to the φ input terminal of the first pulse counter 82 and the input terminal of the fifth AND circuit 83 via the fourth AND circuit 81. And the other input terminal of the fourth AND circuit 81 is connected to the output terminal of the reference frequency signal φ1, and the T signal output terminal of the first pulse counter 82 is connected to the fifth AND circuit 83 and the third pulse generator 85. 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 a time end pulse signal output terminal, and the output terminal of the third pulse generator 85 is connected to the second latch circuit 87. The output terminal of the second latch circuit 87 is connected to the second inverter 61 and the second AND circuit 65 in the discriminating circuit 60 and the lighting circuit 90 which will be described later, as a time signal signal output terminal, and further, a reset signal output terminal. The output terminal of the second AND circuit 65 in the discrimination circuit 60 and the output terminal of the second pulse generator 75 in the command output circuit 70, which is the output terminal of the operation end pulse signal, are connected to the second OR circuit 88 via the second OR circuit 88. It is connected to each reset terminal of the 1-pulse counter 82, the second pulse counter 84, and the second latch circuit 87.

The first pulse counter 82 counts the number of pulses of the reference frequency signal φ 1, and when, for example, 3 minutes are counted, the T output is set to H level, and the second pulse counter 84 counts the reference frequency signal φ 1. For example, when the time is measured for 30 seconds, the T output becomes the H level. Therefore, the timer circuit 80 opens the fourth AND circuit 81 when the command output circuit 70 outputs the H level operation command signal, inputs the reference frequency signal φ1 to the first pulse counter 82, and after 3 minutes. When the first pulse 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 become the H level, which is discriminated from the timing circuit 80. While outputting a timing notice signal to the circuit 60 and the lighting circuit 90, the fifth AND circuit 83 is opened to input the reference frequency signal φ1 via the fourth AND circuit 81 to the second pulse counter 84 to output the second pulse. When the T output of the second pulse counter 84 reaches the H level 30 seconds after the counter 84 starts timing, the H pulse is output from the fourth pulse generator 86 to the F signal, and the timing end pulse signal is output. It is intended to send the command output circuit 70 to.

The present embodiment has a lighting circuit 90 that gives a notice of interruption of a call. The lighting circuit 90 includes 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 sixth AND circuit 93 is connected in series to an L-level power source via a lamp such as an operational amplifier 95 and a light emitting diode 97, and a protective resistor 99. .

Therefore, in the lighting circuit 90, the J signal, which is the output of the NAND circuit 91, is held at the H level when the H level timing notice signal is not input, and the command output circuit 70 outputs the G signal at the H level. When the operation command signal is output, the output of the sixth AND circuit 93 becomes H level to turn on the lamp such as the light emitting diode 97, and when the timekeeping advance signal is input to the lighting circuit 90, the NAND circuit is turned on. The J signal, which is the output of 91, becomes a pulse signal based on the reference frequency signal .phi.2 of 1 Hertz, and causes the light emitting diode 97 to blink.

As described above, in the present embodiment, the switch detection circuit 50 is configured as the second timer-47 because it includes the switch detection circuit 50, the determination circuit 60, the command output circuit 70, the time counting circuit 80, and the lighting circuit 90. -When the switch signal of the H pulse is detected and the switch signal of the H pulse is output to the B signal, the H pulse passes through the first AND circuit 63 in the discrimination circuit 60 and becomes the C signal and the start signal of the H pulse. This 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. From the command output circuit 70 to the G signal, the H level operation command is output. A signal will be output.

As described above, when the operation command signal is output by operating the talk switch 41, the lighting circuit 90 turns on the light emitting diode 97, and the first circuit in the timing circuit 80. The pulse counter 82 starts timing based on the reference frequency signal φ1, outputs a timing notification signal after 3 minutes, and causes the second pulse counter 84 to start timing, and at the same time, causes the first AND circuit 63 in the determination circuit 60 to operate. The second AND circuit 65 is closed to open, and the light emitting diode 97 in the lighting circuit 90 is blinked.

In this way, 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 causes the B signal to be output. The switch signal of the H pulse output to the D signal 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 and the second pulse counter 84 in the timing circuit 80 are output. It is also possible to reset the second latch 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 after the timing advance notice signal is output from the timing circuit 80, the fourth pulse generator 86 outputs a timing end pulse signal, and a command is issued. The D-flip-flop 73 in the output circuit 70 sets its Q output to the H level, the second pulse generator 75 outputs the H pulse operation end pulse signal to the I signal, and the first pulse counter 82, The two-pulse counter 84 and the second latch circuit 87 are reset, the first latch circuit 79 and the D-flip-flop 73 in the command output circuit 70 are reset, the output of the operation command signal is stopped, and the second timer-47. Is reset to the initial state, and after the operation command signal is output, the torque switch is restarted before the timing warning signal is output. Even when 41 is operated, the start signal from the discriminating circuit 60 is input to the command output circuit 70, the output of the operation command signal is stopped, and the second timer 47 can be returned to the initial state.

[0024]

[Effect of the device]

 The door horn device according to the present invention includes a switch detection circuit as a second timer that outputs a switch signal by detecting that a talk switch is operated, and a switch signal as a start signal or a reset signal. A discriminating circuit for outputting, a command output circuit for outputting 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 a start of clocking at the same time as the start of the operation command signal output. Outputs the timing end pulse signal that stops the output of the operation command signal after a certain period of time, and outputs the timing advance notice signal for the predetermined time period before the timing end pulse signal is output. Since it has a clock circuit to perform, if the talk time becomes long, the talk time can be extended by operating the talk switch, and the call can be communicated during the call with the cordless handset. It can be prevented from being cut off.

[Brief description of drawings]

FIG. 1 is a second view showing a second embodiment of 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 Base Unit 31 Monitor Television 33 Monitor Power Supply 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 only 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 output of the operation command signal is started or stopped alternately. A command output circuit that outputs an operation end pulse signal when the output of the operation command signal is stopped, and starts the timing of the required time by detecting the operation command signal, and after the required time, a timing end pulse The determination circuit has a timing circuit that outputs a signal and outputs a timing warning signal for a predetermined time before outputting the timing end pulse signal, and when the reset signal is input, measures the required time again from the beginning. , When a 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.