JP2003134244A - Interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To additionally connect two or more interphones to an existing house information panel without the need for any modification on the house information panel. SOLUTION: The two extension interphones JB are connected to the house information panel J via a speech signal line L. Each of the extension interphones is provided with a speech use amplifier 4 and a disconnection section 5 connected to the amplifier 4. When the one extension interphone JB2 is used, the disconnection section 5 of the other extension interphone JB1 not in use is controlled to disconnect the amplifier 4 as the control. Further, in this case, a display light 11C of the extension interphone JB1 not in use is lighted. Each of the extension interphones is provided with a voltage electrode 7 for detecting a dropped voltage of the speech signal line and a hook ON/OFF detection section 3 for detecting a state of a hook switch 2 so as to discriminate the state of use of the extension interphones.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom system, and more particularly to an intercom system installed in an apartment house.

[0002]

2. Description of the Related Art FIG. 2 is a system diagram showing a configuration of an intercom system for an apartment house disclosed in Japanese Patent Laid-Open No. 2000-69182. An intercom system for an apartment house will be described with reference to FIG.

In FIG. 2, EP1 and EPk are collective entrance machines installed in the collective entrance. Also SM1, SM2
Is an administrator intercom installed in the administrator room.
The manager intercom SM1 is integrated with the call control device TC to form a manager SMP. The VC is a video control device connected to the call control device.

J1 and J2 to Jn are housing information boards installed in each dwelling unit. A crime prevention sensor SE1 and a fire sensor SE2 are connected to the house information board J2 via an intercom DP2 installed at the entrance and monitoring lines LS1 and LS2. Further, an additional intercom JB2 having a part of the functions of the house information board J2 is connected to the house information board J2 as required. Similar door phones DP and sensors SE for disaster prevention are connected to the other house information boards J1 and Jn.

[0005] These collective entrance machines EP, manager room parent machine SM
The P, the video control device VC, and the house information board J are connected by a control line, a call line, and a video line (L11 to L51), respectively, and control signals, voice (call) signals, video signals, and the like are exchanged.

In such an intercom system for an apartment house, in response to a call from the apartment entrance EP, the house information panel J or the extension intercom JB can use the intercom function to make a call. The lock can be unlocked. Similarly, the doorphone DP
In response to a call from the home information panel J and the extension intercom JB, the intercom function can be used.
In addition, a call can be made between the house information board J and the extension intercom JB by using the intercom function.

If an additional intercom is provided, it is possible to answer a call from the collective entrance EP or the doorphone DP without going to the place where the house information board J is installed. Therefore, this extension intercom JB is often installed when the floor area of the dwelling unit is large.

[0008]

By the way, in recent years, in a dwelling unit having a large floor area and a large number of rooms, one extension intercom is not enough, and it is possible to connect two or more extension intercoms to a home information board. Is desired. Therefore, an object of the present invention is to make it possible to connect two or more extension intercoms without changing the existing home information panel that can be connected to only one.

[0009]

SUMMARY OF THE INVENTION The present invention is an intercom system in which at least two extension intercoms are connected to a home information panel via a call signal line, and the extension intercoms are provided with indicator lights, When the extension intercom is used, only the indicator light of the other extension intercom not in use is turned on. Further, the extension intercom is provided with an amplifier for communication and a setting unit for setting a delay time, and the amplifier is controlled so as to be disconnected after the delay time elapses. Also, provide an amplifier for communication and a disconnecting part on the extension intercom, and when one extension intercom is used, control the disconnection part of the other extension intercom that is not in use to disconnect the amplifier. It is characterized by.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a drawing showing an intercom system for an apartment house of the present invention, and particularly a block diagram of an extension intercom. In addition, in FIG. 1, a doorphone DP and an extension intercom J are added to the housing information board J.
Although the state where only B is connected is shown, as shown in FIG. 2 of the conventional example, the collective entrance EP is connected to the house information board J via the call control device TC.

At least two or more extension intercoms JB are connected to the house information board J via a call signal line L. This call signal line L includes two transmission lines (call lines)
And the control lines and the like are shown together. A predetermined voltage (for example, 9V) is constantly applied to the call signal line L.

JB1 and JB2 are additional intercoms, which have some functions of the house information board J, such as an intercom function and an alarm function. In FIG. 1, the extension intercom JB2 has the same internal configuration as the extension intercom JB1, and therefore the internal illustration is omitted. These additional intercoms JB1 and JB2 and the house information board J are distributed and installed in a dwelling unit such as a bedroom, a study, and a living room.

First, the structure of the internal block of the extension intercom JB1 will be described. Reference numeral 1 denotes a handset, which has a speaker SP and a microphone MC built therein. The handset 1 is normally hung on the main body of the extension intercom JB, and in that state, the hook switch 2 is off. One end of the hook switch 2 is connected to the call signal line L, and when the handset 1 is lifted and hooked on the hook, the voltage of the call signal line L decreases to, for example, 6V.

Reference numeral 3 is a hook ON / OFF detecting section for detecting the ON / OFF state of the hook switch 2. Reference numerals 4A and 4B are call amplifiers, which are connected to the speaker SP and the microphone MC of the handset 1. Reference numeral 6 denotes a call unit, which connects the handset 1 to the call signal line L when the hook switch 2 is turned on, and exchanges voice signals with the handset 1 and the housing information board J (or the intercom DP or the collective entrance EP). Is to do.

Reference numeral 7 denotes a voltage detecting section which is connected to the call signal line L and detects a drop in the voltage of the call signal line L.
The voltage detection unit 7 can identify whether one extension intercom JB is on-hook or two extension intercom JB is on-hook based on the amount of voltage decrease. Reference numeral 8 denotes a signal transmission / reception unit, which is a portion for exchanging signals with the housing information board J via the call signal line L. For example, it receives an alarm signal from the house information board J or sends an unlock signal for auto-lock when an unlock button (not shown) of the extension intercom JB is pressed.

Reference numeral 10 is composed of a DIP switch or the like,
It is a setting unit for setting the delay time. By setting the delay time, the priority of the call when two or more extension intercoms JB are simultaneously on-hooked is set. Setting section 1
In 0, several different delay times are prepared. Specifically, the call signal line L of the extension intercom JB
The delay time is more than the number of connected devices above. Then, the delay time is selectively set for each extension intercom JB. That is, different delay times are set for the additional intercoms JB.

Reference numeral 11 is a display portion provided on the surface of the additional intercom JB, and is provided with a busy lamp 11C as an indicator light. The in-use lamp 11C is lit when another extension intercom JB is used for a call,
In other words, the extension intercom JB that is not used
Only the in-use light of turns on. Although not shown, the display unit 11 is provided with a visitor lamp that lights up when there is a visitor.
Reference numeral 12 is a calling section, which is a section for outputting a ringing sound by a buzzer or the like when a call is made from the intercom DP or the collective entrance EP.

Reference numeral 13 is an alarm unit composed of a speaker.
For example, when a fire detector connected to the house information board J detects a fire, an alarm sound is output. Amplifiers 4C and 4D are connected to the calling unit 12 and the alarm unit 13. Note that the amplifiers 4A to 4D are connected with disconnecting units 5A to 5D. The disconnecting sections 5A to 5D are composed of, for example, switches that are normally closed, and are opened by a signal from the control section 16.

Although the amplifier 4C of the calling unit 12 and the amplifier 4A of the handset 1 for reception (for speaker SP) are shown separately, they may be combined. A transistor may be used instead of the switch of the disconnecting section 5. The disconnecting section 5 disables the use of the amplifier 4,
This is an example of means for turning off, and for example, in addition to disconnecting the connection with the handset 1 or the like by a switch or the like,
The line may be short-circuited to cut off the connection.

Reference numeral 16 is a control unit, which is the hook ON / O described above.
The FF detector 3 controls each block of the alarm unit 13. In particular, the control unit 16 determines the usage status of the extension intercom JB based on the signals from the hook ON / OFF detection unit 3 and the voltage detection unit 7, and turns on and off the in-use lamp 11C and disconnects units 5A to 5D. It controls.
It should be noted that each of the constituent blocks 3 to 16 includes an extension intercom J
Power is supplied from a power supply unit (not shown) of B.

Next, the operation of the extension intercom JB will be described. As an example, there is a call from the collective entrance machine EP,
A case of responding with the extension intercom JB1 will be described. Expansion intercom JB1 and expansion intercom J
Since the processing is different in B2, each case will be sequentially described.

First, a visitor operates the collective entrance machine EP to call a person in a house. When the calling signal is output from the collective entrance EP, the signal transmitting / receiving unit 8 receives the calling signal from the call control line L. Then, the control unit 16 causes the calling unit 12 to
A ring tone is output from to notify that there is a visitor. At this time, a ringing tone is output from the two additional intercoms JB1 and JB2 and the house information board J.

Then, when the handset 1 of the additional intercom JB1 is lifted, the hook switch 2 is turned on. At this time, the hook switch 2 is turned on, so that the voltage of the call signal line L (more precisely, the transmission line therein) drops from 9V to 6V. This voltage drop is detected by the voltage detector 7, and the on-hook state is detected by the hook ON / OFF detector 3.

In the control section 16 of the extension intercom JB1, the extension intercom JB1 itself is used for a call among the plurality of extension intercoms on the call signal line L because the voltage has dropped and the hook has gone on hook. You can judge that. In this way, when the telephone itself is used for a call, the control unit 16 keeps the switch state of the disconnecting units 5A to 5D as it is in the ON state.

When the handset 1 is lifted and the hook switch 2 is turned on, voice can be exchanged between the handset 1 and the collective entrance EP through the call section 8 and the call signal line L. When an unlock button (not shown) of the extension intercom JB1 is pressed, an unlock signal is sent from the signal transmitting / receiving unit 8 to unlock the auto lock,
Can invite guests.

Next, the operation of the extension intercom JB2 will be described. As described above, when the hook switch 2 of the extension intercom JB1 is turned on, the voltage of the call signal line L decreases. This voltage drop is due to the extension intercom JB
It is also detected by the voltage detector 7 of No. 2. However, in the extension intercom JB2, since the handset 1 cannot be lifted, the hook switch 2 is off, which is detected by the hook ON / OFF detection unit 3.

Therefore, in the control unit 16 of the extension intercom JB2, the voltage drops and the hook is off-hook. Therefore, among the extension intercoms on the call signal line L, any extension intercom other than itself is present. It can be determined that (JB1 in this case) is being used during a call.

When another extension intercom JB1 is used as described above, the control unit 16 disconnects the separation units 5A to 5A.
The amplifier 4 is controlled by controlling D so that the switch state is opened.
Separate A to 4D and turn off. As a result, the extension intercom JB2 eliminates the ringing sound output from the calling unit 12. Further, the control unit 16 of the extension intercom JB2 turns on the in-use lamp 11C of the display unit 11. By turning on the in-use lamp 11C, the extension intercom JB
The person in the dwelling unit who wants to operate 2 can know that another extension intercom JB1 is in use, and discontinues the operation. Even if the user does not notice that the busy lamp 11C is lit, the handset 1 cannot be used even if the handset 1 is lifted because the call amplifiers 4A and 4B are separated by the disconnecting portions 5A and 5B.

Next, in response to calling the collective entrance machine EP,
A ringing tone is output from the calling unit 12, and a person in the dwelling unit simultaneously receives the extension intercoms JB1 and JB2 handsets 1,
The case of lifting 1 will be described. The setting unit 10
As a result, delay time is 300m for the extension intercom JB1
s is set, and delay time 9 is added to the extension intercom JB2.
It is assumed that 00 ms is set.

When two handsets 1 are lifted at the same time, the respective hook switches 2 are turned on, and the voltage of the call signal line L is further lowered from 6V when one is set, for example 4.5V. Fall to. Voltage detector 7
Detects a drop in voltage and detects that the two additional intercoms JB are on-hook from the amount of drop.
Further, the hook ON / OFF detection unit 3 detects that the hook switch 2 is turned on. In the control unit 16,
When judging such voltage drop and on-hook condition,
After the delay time of the setting unit 10 has elapsed, the amplifiers 4A to 4D are controlled so as to be disconnected.

That is, in the extension intercom JB1, after the delay time of 300 ms has elapsed, the disconnecting section 5
The switch states of A to 5D are opened, and the amplifiers 4A to 4D are
Turns off. As a result, the extension intercom JB1 eliminates the ringing sound output from the calling unit 12.
Further, since the call amplifiers 4A, 4B are also turned off, even if the handset 1 is lifted, it is not possible to talk with the calling visitor. At this time, the control unit 16 of the extension intercom JB1 turns on the in-use lamp 11C. By lighting the busy lamp 11C, a person who operates the handset 1 of the additional intercom JB1 can determine that the other additional intercom JB2 is used and has answered the call.

By the way, when the disconnecting parts 5A and 5B of the extension intercom JB1 are opened, the voltage of the call signal line L rises from the state of 4.5V and returns to 6V. This is because the amplifiers 4A and 4B for communication have a certain load, and the disconnection portions 5A and 5B are opened, so that this load is not applied to the communication signal line L. The degree of load is designed to be 6 V when disconnected, that is, the same voltage as when only one extension intercom JB is on-hook.

Next, the extension intercom J whose delay time is set to 900 ms which is longer than the extension intercom JB1
The process of B2 will be described. When 300 ms elapses after the two handsets 1 are lifted at the same time, as described above, the disconnecting section 5A of the extension intercom JB1
~ 5D is disconnected, the voltage of the call signal line L is 4.5V
To 6V. Therefore, additional intercom JB2
Detects a voltage drop of 6V by the voltage detection unit 7, and further detects an on-hook by the hook ON / OFF detection unit 3. This state is the same as the state in which only the extension intercom JB2 itself is on-hook among the plurality of extension intercoms JB.

Therefore, the extension intercom JB2 keeps the state of the disconnecting sections 5A to 5D as it is, that is, turns on the amplifiers 4A to 4D. In this way, in the extension intercom JB2, it is possible to make a call via the handset 1 with the calling group entry machine EP. By providing the setting unit 10 in this manner, it becomes possible to preferentially make a call by the one having the longest delay time.

In this embodiment, the disconnection unit 5 connected to the amplifier 4 is provided in the extension intercom JB, and when one extension intercom JB2 is used, the disconnection unit 5 of the other extension intercom JB1 which is not used is controlled. Then, the amplifier 4 was controlled so as to be disconnected. Therefore, for the home information board J, the same state (situation) as when only one extension intercom JB is connected to the call signal line L is created.

By the way, in the conventional home information board J, one additional intercom J
Some are designed so that only B can be connected. However, as in the present application, by disconnecting the amplifier 4 of the extension intercom JB that is not used during a call so that it cannot be used, without changing the existing home information board J at all,
It is possible to connect two or more extension intercoms JB. Therefore, the problem that the number of connected devices increases and the voltage decreases can be solved.

In this embodiment, the case where two extension intercoms are installed has been described as an example, but the number of extension intercoms connected to the call signal line may be three or more. When the fire detector connected to the house information board J operates and the signal transmission / reception unit 8 receives an alarm signal, the control unit 1
6 controls the disconnecting unit 5D connected to the amplifier 4D of the alarm unit 13 so as to be in the ON state. By doing so, even when the extension intercom JB2 is in use by a telephone call and the extension intercom JB1 is in an unusable state, it is possible to issue only an important alarm such as a fire. Further, the separation unit may be provided in addition to the amplification circuit. For example, connect the disconnecting unit to the unlocking unit that outputs the unlocking signal, and when it is not used, that is, when another extension intercom is in use, control the disconnecting unit to prevent the unlocking signal from being output. May be. Further, as a delay time, a setting of ∞ (infinity) may be provided so as to continue waiting until another extension intercom is disconnected and always preferentially connect to the call signal line.

[0038]

As described above, the present invention is configured as described above, and the indicator light is provided in the extension intercom, and when one extension intercom is used, only the indicator light of the other extension intercom that is not used is turned on. did. Therefore, the person in the dwelling unit who wants to operate the extension intercom can know that another extension intercom is in use.

Further, the extension intercom is provided with a call amplifier and a setting unit for setting the delay time, and the amplifier is controlled so as to be disconnected after the delay time has elapsed. Therefore, when two or more extension intercoms are used at the same time, the one having the longest delay time can preferentially make a call.

Further, the extension intercom is provided with an amplifier for communication and a disconnecting part connected to the amplifier, and when one extension intercom is used, the disconnecting part of the other extension intercom not used is controlled. , Controlled to disconnect the amplifier. Therefore, the home information panel is in the same state as when only one additional intercom is connected to the call signal line. Therefore, it is possible to connect two or more additional intercoms to the house information board without changing the existing housing information board that can connect only one additional intercom.

[Brief description of drawings]

FIG. 1 is a block diagram of an extension intercom of the present invention.

FIG. 2 is a system diagram showing a configuration of a conventional intercom of an apartment house.

[Explanation of symbols]

4A to 4D amplifier, 5A to 5D disconnecting unit, 7 voltage detecting unit, 8 signal transmitting / receiving unit, 10 setting unit, 11
C busy light, 16 control section, J housing information board, JB
Extension intercom, L call signal line,

Claims (5)

[Claims] 1. An intercom system in which at least two extension intercoms are connected to a housing information panel via a call signal line, wherein an indicator light is provided on the extension intercom, and when one extension intercom is used, An intercom system characterized by turning on only the indicator light of the other extension intercom that is not in use. 2. An intercom system in which at least two extension intercoms are connected to a housing information panel via a call signal line, and an amplifier for a call and a setting unit for setting a delay time in the extension intercoms. And an intercom system for controlling the amplifier to be disconnected after the delay time has elapsed. 3. A voltage detector for detecting a drop in the voltage of the call signal line, and a hook O for detecting the state of a hook switch.
An N / OFF detector is provided, and when it is determined from the voltage drop and the state of the hook switch that a plurality of extension intercoms are used, control is performed to disconnect the amplifier after the delay time elapses. The intercom system according to claim 2, which is characterized in that. 4. An intercom system in which at least two extension intercoms are connected to a house information panel via a call signal line, wherein the extension intercom is provided with a call amplifier, and one extension intercom is used. An intercom system characterized by controlling so as to disconnect the amplifier of the other extension intercom that is not used at the time. 5. A voltage detector for detecting a voltage drop of the call signal line and a hook O for detecting a state of a hook switch.
The intercom system according to claim 1 or 4, further comprising an N / OFF detection unit, wherein the usage status of the extension intercom system is determined based on the voltage drop and the state of the hook switch.