JPH1116060A - Door phone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use this device as a burglar preventing function by generating a warning sound from a doorphone to an intruder staying for a long time for any purpose except communication at a front door. SOLUTION: This device is provided with a doorphone slave device 15 having a microphone 10 and a speaker 11 which is provided at a front door, and a doorphone master device 25 having a microphone 16 and a receiver 17 which is provided in a room for executing communication with the doorphone slave device. The doorphone slave device incorporates an infrared human body sensor 18 for detecting a human body staying in front of the front door slave device, and transmitting a detection signal (f), and the doorphone master device is provided with a controlling part 19 for allowing the speaker of the doorphone slave device to generate a warning sound at the time of receiving the detection signal except the communication time, and detecting it in a prescribed title.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door phone apparatus, and more particularly to a door phone which is useful for crime prevention by generating a warning sound from a door phone for an intruder who has been standing still at an entrance for a long time other than talking for a long time. Related to the device.

[0002]

2. Description of the Related Art Conventionally, an intercom apparatus shown in FIG. 3 has been proposed as a general parent-child intercom. This intercom apparatus includes an intercom slave unit 35 provided at the entrance and having a microphone 30 and a speaker 31, and an intercom master unit 45 provided indoors and having a microphone 36 and a receiver 37 and communicating with the intercom sub unit 35. I have.

The microphone 30 and speaker 31 of the intercom slave unit 35 are connected via a two-wire / four-wire conversion circuit 32, and the microphone 36 and receiver 37 of the intercom master unit 45 are connected via a two-wire / four-wire conversion circuit 38 to the line L1. Can be connected to each other via a telephone.

[0004]

In this intercom apparatus, the microphone 30 and the speaker 31 of the intercom slave 35 and the microphone 36 and the receiver 37 of the intercom master 45 can communicate with each other. There is a drawback that it does not have security against an intruder who has been standing still for a long time for other purposes.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and allows a microphone and a speaker of an intercom slave unit to communicate with each other by a microphone and a receiver of the intercom master unit. It is an object of the present invention to provide a door phone device that is useful for crime prevention by generating a warning sound from a door phone for an intruder who has been standing still for a long time.

[0006]

In order to achieve this object, a door phone apparatus according to the present invention comprises a door phone sub-unit having a microphone and a speaker provided at an entrance and a door phone sub-unit having a microphone and a receiver provided indoors. The main unit has a built-in infrared human body sensor that detects a human body staying in front of the main unit and sends out a detection signal. And a control unit for generating a warning sound from the speaker of the entrance slave unit when a predetermined time is detected.

[0007]

In this intercom apparatus, the infrared human body sensor of the intercom slave unit detects a human body existing or staying in front of the intercom slave unit and sends out a detection signal. The detection signal is
It is transmitted to and received by the control unit of the intercom master unit. The control unit generates a warning sound signal when a detection signal is detected for a predetermined time in a state other than during a call, and generates a warning sound from a speaker of the intercom slave unit.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a door phone apparatus according to the present invention will be described below with reference to FIG. The door phone apparatus of the present invention includes a door phone slave unit 15 provided at the entrance and having a microphone 10 and a speaker 11, and a door phone master unit 25 provided indoors and having a microphone 16 and a receiver 17 and communicating with the door phone slave unit 15. Have.

The microphone 10 and speaker 11 of the intercom slave unit 15 are connected to the microphone 16 and the receiver 17 of the intercom master unit 25 via the two-wire / four-wire conversion circuit 12, and the line La is connected via the two-wire / four-wire conversion circuit 20. Can be connected to each other via a telephone. The intercom slave unit 15 has a built-in infrared human body sensor 18 for detecting a human body staying in front of the intercom slave unit and transmitting a detection signal f.

The intercom master unit 25 receives the detection signal f except for a call and detects the interrogation signal f for a predetermined time.
A control unit 19 for generating a warning sound from the speaker 11 is provided. The control unit 19 includes a storage circuit 21 connected to the infrared human body sensor 18 of the intercom slave unit 15 via the line Lb, and a voltage comparator 22 connected to the storage circuit 21.
And a warning sound generator 23 connected to the voltage comparator 22. The storage circuit 21 includes a hook switch 29 that operates by hook-on and hook-off of a handset including the microphone 16 and the receiver 17, and a hook switch 2.
9 is connected to a hook switch detection circuit 24 for detecting the operation of the switch 9. The warning sound signal of the warning sound generator 23 is 2 lines / 4
The signal is input to the line conversion circuit 20.

In the doorphone apparatus thus constructed, the infrared human body sensor 18 of the doorphone slave unit 15 detects a human body existing or staying in front of the doorphone slave unit and sends out a detection signal f. The detection signal f is sent to the storage circuit 21 of the control unit 19 of the intercom master unit 25 and received. The accumulation circuit 21 accumulates a detection signal when the hook switch detection circuit 24 detects a state in which the handset of the microphone 16 and the receiver 17 is not in a call-on state and the voltage comparator 22 accumulates in the accumulation circuit 21. When it is determined that the data is equal to or higher than the preset threshold level, the warning sound generator 23 is started to generate a warning sound signal,
A warning sound is generated from the speaker 11 of the intercom slave unit 15 via the two-wire / four-wire conversion circuit 20, the line La, and the two-wire / four-wire conversion circuit 12.

Next, another embodiment of the intercom apparatus of the present invention will be described with reference to FIG. Door phone master unit 25
Is provided with a control unit 19 that generates a warning sound from the speaker 11 of the intercom slave unit 15 when the detection signal f is received and detected for a predetermined time except during a call.

The control unit 19 includes an infrared sensor interface (I / F) 26 connected to the infrared human body sensor 18 of the intercom slave unit 15 via the line Lb, and a control device (I / F) to which the infrared sensor interface 26 is connected. CP
U) 27 and the alarm sound generator 2 connected to the control device 27
And 3. The control device 27 includes a timer setting switch 28 and a hook switch interface (I / F) 24 to which an operation state signal of a hook switch 29 operated by hook-on and hook-off of a handset including the microphone 16 and the receiver 17 is input. It is connected. The warning sound signal of the warning sound generator 23 is connected to the two-wire / four-wire conversion circuit 20.

In the intercom apparatus thus constructed, the infrared human body sensor 18 of the intercom slave unit 15 detects a human body existing or staying in front of the intercom slave unit and sends out a detection signal f. The detection signal f is transmitted to and received by the control device 27 via the infrared sensor interface 26 of the control unit 19 of the intercom master unit 25. Control device 27
The detection signal f is set by the timer setting switch 28 when a state in which the handset of the microphone 16 and the receiver 17 is not a call in which the handset of the microphone 16 and the receiver 17 is hooked on is detected via the hook switch interface 24 interlocked with the hook switch 29. When a predetermined period of time is detected, the alarm sound generator 23 is started to generate an alarm sound signal, and the doorphone element is passed through the two-wire / four-wire conversion circuit 20, the line La, and the two-wire / four-wire conversion circuit 12. A warning sound is generated from the speaker 11 of the device 15.

[0015]

As is apparent from the above description, according to the door phone apparatus of the present invention, a warning sound is generated from the door phone to an intruder who stays at the entrance for a long time other than the purpose of talking. , Can fulfill the security function.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a door phone device of the present invention.

FIG. 2 is a block diagram showing another embodiment of the door phone apparatus of the present invention.

FIG. 3 is a block diagram of a conventional door phone device.

[Explanation of symbols]

 10 Microphone 11 Speaker 15 Doorphone slave 16 Microphone 17 Receiver 25 Doorphone Master f: Detection signal 18: Infrared human body sensor 19: Control unit

Claims (1)

[Claims] 1. A door phone slave unit (15) provided at a front door and having a microphone (10) and a speaker (11), and a telephone (16) provided indoors and having a microphone (16) and a receiver (17). A door phone base unit (25) for performing the above operation, wherein the door phone slave unit has a built-in infrared human body sensor (18) for detecting a human body staying in front of the entrance slave unit and transmitting a detection signal (f); The intercom apparatus, wherein the master unit is provided with a control unit (19) for generating a warning sound from the speaker of the intercom slave unit when the detection signal is received and detected for a predetermined time except during a call.