JP3569091B2 - Apartment house TV intercom system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multi-family television intercom apparatus, and more particularly to a multi-family television intercom apparatus capable of monitoring a voltage of a video main line from outside a room.
[0002]
[Prior art]
As shown in FIG. 3, the conventional collective housing television intercom apparatus includes a collective entrance unit 1, a plurality of room units 3,..., And a plurality of room units connected to the collective entrance unit 1 via a video trunk line L. , And a plurality of branch units 40, 40,... That supply power and video signals from the controller 2 to the monitors 31 of the plurality of room units 3, 3,. Have.
[0003]
The collective entrance unit 1 includes a camera 1C for imaging a visitor, a numeric keypad 1T for calling the indoor unit 3, a microphone 1M for talking with a person in the indoor unit 3, and a speaker 1S. The system includes a monitor 31 for projecting an image transmitted from the camera 1C, and a handset 32 for communicating with a visitor of the collective entrance apparatus 1.
[0004]
The control device 2 connected to the collective entrance device 1 is bus-connected to the monitor 31 and the handset 32 of each room unit 3 via a video main line L and an audio main line (not shown). In the collective housing television intercom apparatus, a power supply and a video signal are branched and supplied from the controller 2 to the monitors 31, 31,... Of the plurality of room units 3, 3,. Then, the living room unit 3 is called from the collective entrance device 1 to output a video signal to the monitor 21, and a call is made via a voice trunk line.
[0005]
[Problems to be solved by the invention]
In this collective housing television intercom apparatus, when a power supply failure occurs in a certain living room 3, whether or not a normal voltage is supplied to the living room unit 3 is determined by a branching part T <b> 7 of the branching device 40 corresponding to the living room 3. At T8, in order to check whether the voltage is normally supplied from the video main line L or whether the voltage is normally supplied from the branch circuit 45, the power supply voltage must be measured using a tester or other inspection equipment. Did not.
[0006]
Furthermore, in the case where the trouble occurs in a plurality of rooms, if the number of floors or the number of rooms in the apartment house is large, there is a problem that it takes time to specify where the abnormality is.
[0007]
The present invention has been made in order to solve such a difficulty, and it is an object of the present invention to provide a multi-family television intercom apparatus capable of displaying a voltage monitoring state of a video main line outside a living room and immediately finding an abnormal place. It is an object.
[0008]
[Means for Solving the Problems]
In order to achieve this object, a multi-family television intercom apparatus of the present invention connects a multi-entry unit having a camera to a controller, monitors the plurality of room units via a video main line and an audio main line, and transmits and receives a signal. Power supply and video signals from the controller via a branch line interposed in the video main line, branch supply to the monitors of multiple living room units, and call out each living room unit from the collective entrance unit to output the video signal. A multi-family television intercom apparatus for displaying a picture on a monitor and making a call, wherein a diode bridge for rectifying AC or DC power sent to the video main line and a minimum to be supplied to the video main line are provided in each branch. a Zener diode having a set threshold voltage to the voltage, the indicator lamp which lights when the threshold voltage or higher is applied to the Zener diode, flows through the Zener diode And a resistance value to limit current is set resistor, a Zener diode, indicator, resistance current rectified by the diode bridge is connected in series with the diode bridge to be energized.
[0009]
Each branch unit includes a zener diode having a threshold voltage set to the lowest voltage to be supplied to the video main line, and an indicator light that is turned on when a voltage equal to or higher than the threshold voltage is applied. If the voltage is not supplied, the indicator lamp does not light up and the abnormal part can be immediately identified.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a multi-family television intercom apparatus according to the present invention will be described in detail with reference to the drawings.
[0011]
As shown in FIG. 1, the collective housing television intercom apparatus of the present invention includes a collective entrance unit 1, a plurality of living room units 3,..., And a plurality of living rooms connected to the collective entrance unit 1 via a video trunk line L. , And a plurality of branch units 4, 4,... That supply power and video signals from the controller 2 to the monitors 31 of the plurality of living room units 3, 3,. It has.
[0012]
The collective entrance device 1 includes a camera 1C for capturing an image of a visitor, a numeric keypad 1T for calling the living room device 3, a microphone 1M for talking with a person in the living room device 3, and a speaker 1S. Each living room device 3, 3,. The front door 1 is provided with a monitor 31 for projecting an image transmitted from the camera 1C, and a handset 32 for communicating with a visitor of the collective front door 1.
[0013]
The control device 2 connected to the collective entrance device 1 is bus-connected to the monitor 31 and the handset 32 of each of the room units 3, 3,... Via a video main line L and an audio main line (not shown). , A power supply and a video signal are branched and supplied from the controller 2 to the monitors 31, 31,... Of the plurality of room units 3, 3, via the branch unit 4 interposed on the video main line L, The living room unit 3 is called from the collective entrance unit 1 to output a video signal to the monitor 31, and a call is made via a voice trunk line.
[0014]
Each of the branch units 4, 4,... For branching and supplying a power supply and a video signal from the controller 2 to the monitors 31, 31,. A zener diode 41 having a threshold voltage that has been set, an LED as an indicator light 42 that is lit when a voltage equal to or higher than the threshold voltage is applied to the zener diode 41, and a resistance value set to limit the current flowing through the zener diode 41. A resistor 43, a diode bridge 44 for rectifying an AC or nonpolarly connected DC power sent to the video main line L, and a branch circuit 45 for branching power and video signals supplied from the video main line L to the living room unit 3. The Zener diode 41, the indicator light 42, the resistor 43, and the diode bridge 44 are connected in series with each other and in parallel with the branch circuit 45. .
[0015]
The appearance of the branch unit 4 is as shown in FIG. 2. If the LED 42 of the branch unit 4 is lit, it is estimated that power is normally supplied from the corresponding branch circuit 45 to the living room unit 3.
[0016]
The operation of the multi-family television intercom apparatus of the present invention will be described below.
[0017]
An AC or DC power supply (in the case of non-polar connection) and a video signal are sent from the controller 2 to the video main line L. The power supply and the video signal are branched from the video main line L via the branch portions T1 and T2 and the branch circuit 45, and sent to the living room unit 3.
[0018]
The current entering the circuit consisting of the diode bridge 44, the LED 42, the resistor 43 and the Zener diode 41 connected in parallel with the branch circuit 45 is rectified by the diode bridge 44, and the power supply over the voltage set in the Zener diode 41 is controlled by the controller. The LED 42 is lit when supplied from the second.
[0019]
The LED 42 is turned on when power is not supplied from the controller 2, when the branches T1 and T2 are not correctly connected from the video main line L, or when there is a problem in the video main line L and the loss of the video main line L is large. do not do.
[0020]
When a power supply failure occurs in a certain room unit 3, the lighting of the LED 42 of the branch unit 4 that branches to the room may be checked to see if there is a problem on the room unit 3 side from the branch circuit 45, It is possible to immediately determine whether there is a problem with the connection of the branch portions T1 and T2 or the trouble of the video trunk line L.
[0021]
Even if the trouble occurs in a plurality of rooms, it is possible to quickly identify whether the trouble is on the image main line L side or an abnormality in the room from outside the room.
[0022]
Since the Zener diode 41 is employed and the LED 42 does not light at a voltage lower than the voltage set for the Zener diode 41, the voltage applied to the video main line L can be monitored.
[0023]
【The invention's effect】
As is clear from the above description, according to the multi-family television intercom apparatus of the present invention, the indicator lamp does not light unless a predetermined voltage or more is supplied, and an abnormal location can be immediately identified from outside the room.
[Brief description of the drawings]
FIG. 1 is a block diagram showing one embodiment of a multi-family television intercom apparatus of the present invention.
FIG. 2 is an external view of a branching device of the multi-family television intercom apparatus according to the present invention.
FIG. 3 is a block diagram illustrating a conventional multi-dwelling house TV intercom apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Entrance machine 1C ... Camera 2 ... Controller 3 ... Room unit 31 ... Monitor 32 ... Handset 4 ... Branching device 41 ... Zener diode 42 ... Indicator light L ... Video trunk line
43 ... resistance
44… Diode bridge

Claims (1)

An entrance hall (1) having a camera (1C) is connected to a controller (2), and the controller is monitored by a plurality of living room units (3, 3,...) Via a video trunk (L) and a voice trunk. (31) The bus is connected to the transmitter / receiver (32), and the controller supplies a power supply and a video signal to the monitors of the plurality of living room units via the branch unit (4) interposed in the video main line. A multi-family television intercom apparatus for calling each living room unit from the multi-entry unit, outputting the video signal to the monitor, and performing a call,
In each branch, a diode bridge (44) for rectifying the AC or DC power sent to the video mains, and a Zener diode (41) having a threshold voltage set to the lowest voltage to be supplied to the video mains An indicator light (42) that lights when a voltage equal to or higher than the threshold voltage is applied to the Zener diode, and a resistor (43) having a resistance value set to limit a current flowing through the Zener diode , The multi- family television intercom device , wherein the Zener diode, the indicator light, and the resistor are connected in series to the diode bridge so that a current rectified by the diode bridge flows.

Images