JP2002247219A - Intercom system for multiple dwelling house - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply power to an entrance set and a plurality of master sets in a living room not through a power source private line but through a common bus for transmitting a data signal or a speech signal. SOLUTION: A common bus 6 is connected with the entrance set 5 consisting of a speech module 2 for calling and speaking and a plurality of switch modules 3 connected to the speech module for tuning and calling the master set in the living room. The common bus is connected with a bus I/F module 1 for supplying power and the plurality of the master sets 4 in the living rooms the tuned one of which calls and speaks to the entrance set. The respective master sets are capable of receiving power through an impedance upper circuit 41 for increasing input impedance in the case of waiting to output impedance. The entrance set is capable of receiving power through an impedance upper circuit 21 for increasing input impedance in the case of waiting to output impedance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom system for a dwelling house, and more particularly to an intercom system for a dwelling house in which an entrance device and a plurality of parent devices are connected to a common bus.

[0002]

2. Description of the Related Art Conventionally, as this type of intercom system for an apartment house, an intercom system for an apartment house as shown in FIG. 3 has been proposed. The intercom system for a condominium includes an entrance device 105 installed at an entrance of the condominium, a parent device 104 installed in a plurality of dwelling units of the condominium,.
, And a common bus 106 for connecting the plurality of living room master units 104,..., And a power supply for supplying DC power to the entrance machine 105 and the plurality of living room master units 104,. And a bus I / F module 101 having a circuit 111.

The entrance unit 105 is connected to a common bus 106 and a dedicated power line 107 for calling and talking, and a plurality of switch modules connected to the calling module 102 and for selecting a parent unit of a living room. 1
03,... Call module 1
Reference numeral 02 denotes an interface circuit 121 connected to the common bus 106 for multiplexing / demultiplexing various signals, a communication circuit 122 connected to the interface circuit 121 and including a microphone, a speaker, and the like, and a data transmission / reception circuit 124 to the interface circuit 121. Control circuit 12 to be connected
3 and a power supply circuit 125 connected to the power supply dedicated line 107. The control circuit 123 is connected to the communication circuit 122. Switch module 103
Has a switch control circuit 133 to which a call switch 131 is connected, and this switch control circuit 133 is connected to the control circuit 123 of the call module 102. The switch module 103 has an illumination circuit 132. Note that the other plurality of switch modules 103,
.. Indicate that the switch control circuits 133 are connected in series.

The parent room unit 104 is connected to a common bus 106 and is an interface circuit 1 for multiplexing and separating various signals.
41, a communication circuit 142 connected to the interface circuit 141 and including a handset, a control circuit 143 connected to the interface circuit 141 via a data transmission / reception circuit 144, and a power supply circuit 145 connected to the power line 107. It is composed of The control circuit 143 is connected to the communication circuit 142.

In the intercom system for a multi-family housing constructed as described above, when a call operation is performed by the call switch 131 of the switch module 103 which can call the room main unit 104 of a predetermined dwelling unit at the entrance device 105, a call data signal is generated. Call module 102 and common bus 1
It is transmitted to the selected living room master unit 104 via 06.
Resident responds to this call by calling circuit 14 of living room base unit 104.
When a call operation is performed with the second handset, a call path is formed between the selected living room parent device 104 and the entrance device 105.

[0006]

However, in the intercom system for an apartment house having such a configuration, as described above, the entrance device 105 and the plurality of living room master devices 104,
, Power supply dedicated line 107
Had to be provided.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is intended to supply power to an entrance device or a plurality of living room master devices by transmitting a data signal or a voice signal instead of a dedicated power line. It is an object of the present invention to provide an intercom system for a condominium that can be operated by bus.

[0008]

The intercom system for a condominium according to the present invention, which achieves the above object, is connected to a common bus and is used for calling / calling and a calling module connected to the calling module to select a main room unit. Equipped with an entrance machine composed of multiple switch modules for
The common bus has a bus I / F module for supplying power, and a selected intercom system for a multi-dwelling unit, in which one selected unit is connected to a plurality of living room master units for calling and talking with an entrance device. The living room master unit is configured such that a plurality of living room master units can be connected to a common bus by receiving power via an impedance upper circuit that increases the input impedance during standby to a high impedance.

According to such an intercom system for a condominium, since the impedance upper circuit performs a constant current operation when power is received by the living room master, a plurality of living room masters are connected to the common bus. This also makes it possible to prevent the AC impedance of the common bus from lowering.

[0010] In the intercom system for a multi-family housing according to the present invention, the front door is connected to a common bus by receiving power through an impedance upper circuit that increases input impedance during standby to high impedance. Things. Accordingly, when power is received by the entrance device, the impedance upper circuit of the entrance device performs a constant current operation, so that even if the entrance device is connected to the common bus, the AC impedance of the common bus is prevented from lowering. It becomes possible.

Further, in the intercom system for an apartment house of the present invention, the bus I / F module can be connected to a common bus by supplying power through an impedance upper circuit that increases the output impedance to a high impedance. It is. This allows the bus
When power is supplied to the common bus by the I / F module, power can be supplied via the impedance upper circuit that performs constant current operation. It is possible to prevent the AC impedance of the bus from lowering.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the intercom system for a condominium according to the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the intercom system for an apartment house according to the present invention has an entrance device 5 installed at the entrance of the apartment house, a living room master unit 4 installed in a plurality of dwelling units of the apartment house, , And a common bus 6 for connecting the entrance device 5 and the plurality of living room master devices 4,..., And the entrance device 5 and the plurality of living room master devices 4 via the common bus 6.
. And a bus I / F module 1 for supplying a DC power supply of, for example, a voltage of 24V.

The entrance machine 5 is connected to a common bus 6 and
It is composed of a call module 2 for making a call, and a plurality of switch modules 3 connected to the call module 2 for selecting a parent unit in the room. As shown in FIG. 1, the communication module 2 has a multiplexing / demultiplexing circuit 26 connected to the common bus 6 via an impedance upper circuit 21 for increasing the input impedance to a high impedance, for example, 9 to 10 kΩ. The separation circuit 26 includes a communication circuit 22 including a microphone M, a speaker S (FIG. 2), a data transmission / reception circuit 24 connected to a control circuit 23, and a power supply circuit 25 for supplying power to each circuit of the entrance machine 5. And are connected respectively. The control circuit 23 is connected to the communication circuit 22 and controls the communication circuit 22. As shown in FIG. 1, the switch module 3 is a switch control circuit 3 to which a call switch 31 is connected.
The switch control circuit 33 is connected to the control circuit 23 of the communication module 2. Further, the switch module 3 has an illumination circuit 32 for illuminating the switch module 3. The switch control circuits 33 of the other plurality of switch modules 3 are connected in series.

As shown in FIG. 1, the living room master unit 4 applies an input impedance to the common bus 6 to a high impedance, for example, 9
It has a multiplexing / demultiplexing circuit 46 connected via an impedance upper circuit 41 increasing to 0-100 kΩ, and the multiplexing / demultiplexing circuit 46 includes a telephone circuit 42 including a handset HS, a calling speaker CS (FIG. 2) and the like. And a data transmission / reception circuit 44 connected to the control circuit 43 and a power supply circuit 45 for supplying power to each circuit of the living room master unit 4. Note that the control circuit 43 is
To control the communication circuit 42.

As shown in FIG. 1, the bus I / F module 1 changes the output impedance connected to a DC power supply via a power supply circuit 11 to a high impedance, for example, 200 to 30.
It has an impedance upper circuit 12 that increases to 0Ω.

In the intercom system for a multi-family housing configured as described above, when a call operation is performed by the call switch 31 of the switch module 3 which can call the room master unit 4 of a predetermined dwelling unit at the entrance machine 5, a call data signal is generated. The signal is transmitted to the selected parent device 4 via the communication module 2 and the common bus 6. The control circuit 4 of the living room master unit 4
Reference numeral 3 causes the calling speaker CS of the calling circuit 42 to emit a ringing sound based on the calling data signal. Resident responds to this call by handset H of communication circuit 42 of living room base unit 4.
When the call operation is performed in S, a communication path is formed between the selected parent device 4 and the entrance device 5, and the communication circuit 42 of the parent device 4
And the communication circuit 22 of the entrance device 5 allows the user to make a telephone call using a voice signal.

Note that stabilized DC power is supplied from the impedance upper circuit 12 of the bus I / F module 1 to the common bus 6, and the impedance upper circuit 21 of the entrance machine 5 and the plurality of living room master units 4,. Power supply circuit 25 and power supply circuit 4 via the impedance upper circuit 41 of FIG.
,... Are received as the standby power supply, and when the power is received by the living room main unit 4, the impedance upper circuit 41 of the living room main unit 4 performs a constant current operation. .. Can be prevented from lowering the AC impedance of the common bus 6. Therefore, the transmission loss of the common bus 6 can be reduced, and the transmission state of the data signal and the audio signal described above can be stabilized. In addition, when power is received by the entrance device 5, the impedance upper circuit 21 of the entrance device 5 performs a constant current operation. Therefore, even when the entrance device 5 is connected to the common bus 6, Since the impedance does not decrease, the transmission loss of the common bus 6 can be reduced, and the transmission state of the data signal and the audio signal can be stabilized. Further, when power is supplied to the common bus 6 by the bus I / F module 1, power can be supplied via the impedance upper circuit 11 which performs a constant current operation. Even if 1 is connected, the AC impedance of the common bus 6 does not decrease, so that the transmission loss of the common bus 6 can be reduced and the transmission state of the data signal and the audio signal described above can be stabilized.

[0019]

As is apparent from the above description, according to the intercom system for an apartment house of the present invention, even if power is supplied to the common bus, the AC impedance of the common bus can be prevented from lowering. In addition, a plurality of living room main units, entrance devices, or bus I / F modules can be connected to a common bus without interrupting transmission of data signals and audio signals. Therefore, even when power is supplied to the common bus, it is possible to ensure reliability when transmitting data signals and audio signals.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a preferred embodiment of a multi-dwelling intercom system according to the present invention.

FIG. 2 is an overall configuration diagram showing an intercom system for an apartment house of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional intercom system for a condominium.

[Explanation of symbols]

 1 ···· Bus I / F module 2 ······ Call module 3 ····· Switch module 4 ····· Main unit in living room 5 ················· Common bus 12, 21, 41 ... Impedance upper circuit

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kengo Nakata 2-18-18 Jinnocho, Atsuta-ku, Nagoya-shi, Aichi F-Term within Aiphone Co., Ltd. (Reference) 5K038 CC11 DD09 EE03 FF01 5K046 BB02 CC17 PP01 PS11 PS22

Claims (3)

[Claims] 1. A communication module (2) connected to a common bus (6) for making a call / call, and a plurality of switch modules (3,...) Connected to the communication module for selecting a parent unit in a room. .), A bus I / F module (1) for supplying power to the common bus, and one selected station calls and talks with the entrance machine. An intercom system for multiple dwelling units connected to a plurality of living room master units (4,...), Wherein each living room master unit has an impedance upper circuit (4) that increases the input impedance during standby to a high impedance.
An intercom system for a multi-family housing, wherein the plurality of living room master units are connected to the common bus by receiving power via 1). 2. The entrance machine is connected to the common bus by receiving power through an impedance upper circuit (21) for increasing an input impedance during standby to a high impedance. The intercom system for an apartment house according to claim 1. 3. The bus I / F module is connected to the common bus by supplying power through an impedance upper circuit (12) for increasing output impedance to high impedance. The intercom system for an apartment complex according to claim 1.