JP2002135436A - Interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interphone system in which a doorphone slave unit shares connection terminals a call button. SOLUTION: In the interphone system consisting of one doorphone slave unit or more each having a speech function, of one unit 3 or more having no speech function but having contacts and of a master unit 1 that is provided with two connection terminals T1, T2 or more interconnecting the units 2, 3, the interphone master unit 1 discriminates which of the doorphone slave unit and the device 3 with the contacts is connected to which of the connection terminals T1, T2 depending on a standby state voltage of the connection terminals T1, T2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an intercom system widely used in a general house or the like.

[0002]

2. Description of the Related Art In recent years, intercom systems have been widely used in ordinary houses and the like, and have a configuration as shown in FIG.

In this system, the intercom master unit 10
At 0, the intercom handsets 201, 201 having a call function are connected to the connection terminals T101, T102, and the call button 300 is connected to the connection terminal T103 as a device having no call function and having a contact. are doing.

The intercom master unit 100 has an internal configuration as shown in FIG. 7, and includes a standby power supply circuit 110 for supplying a 5V voltage as a standby power supply to the doorphone slave 201, and a connection terminal T101 side. Door phone slave 201
A call detection circuit 111 for detecting a call from the telephone, a call detection circuit 112 for detecting a call from the doorphone slave 201 on the connection terminal T102 side, and any of the doorphone slaves 20.
Switching circuit 11 for switching electrical connection with 1,201
3 and a call power supply circuit 114 for supplying a voltage necessary for a call in response to a call from the intercom slave units 201, 201.
A recall detection circuit 115 for detecting a recall from the intercom slave units 201, 201; a microphone MIC and a speaker S.
P and the intercom slaves 201, 201 having called
And a call circuit 300 for making a call between the user and the call button 300.
A power supply circuit 117 for supplying a voltage, and a call button 300
And a call-call detecting circuit 118 for detecting a call from the user.

[0005] The intercom slave unit 201 has an internal configuration as shown in FIG. 8, and has a connection terminal MA 1 for connecting the intercom slave unit 201 to the intercom master unit 100.
Talk circuit 211 for rectifying the power supplied from intercom master device 100, call button 210, microphone MIC and speaker SP, and communicating with intercom master device 100. And

[0006] As described above, the intercom master unit 100 uses the standby power supply circuit 110 to control the intercom slave unit 201.
5V voltage is supplied to the
Due to the load of 1, the voltage value of the connection terminals T101 and T102 is 1.5 V as shown in FIG.

When the call button 210 is operated, the voltage value of the connection terminals T101 and T102 decreases to a predetermined value as shown in FIG. , 112 detect and output a predetermined ringing tone, electrically connect the called intercom slave unit 201, and operate the calling circuit 211 of the intercom slave unit 201 by the calling power supply circuit 113. Power supply with a proper voltage value. At this time, the voltage value of the connection terminals T101 and T102 becomes 5V.

[0008] Further, as described above, intercom master unit 100 uses power supply circuit 116 to call button 300.
Is supplied with a 5V voltage, and the call button 30
When the 0 contact S is closed, the voltage value of the connection terminal T103 becomes
Since the value becomes a predetermined value (for example, 0 V), this is detected by the call call detection circuit 117, and a predetermined ringing tone is output.

[0009]

In the above-described conventional intercom system, the intercom master unit is
Since the intercom slave unit and the call button have different processing systems for calling, the intercom slave unit and the call button cannot share a connection terminal.

An object of the present invention is to provide an intercom system in which a connection terminal can be shared between an intercom slave unit and a call button in an intercom master unit.

[0011]

In order to achieve the above object, in the intercom system according to the first aspect of the present invention, one or more intercom handsets having a call function are provided. An intercom system comprising at least one device having contacts and an intercom master device having two or more connection terminals for connecting the devices, wherein the intercom master device has a difference in standby voltage between the connection terminals. Thus, it is determined whether the device connected to each connection terminal is a door phone slave device or a device having a contact.

In the intercom system according to the second aspect, one or more intercom slave units having a call function, one or more devices having no contact function and having contacts, and two or more devices for connecting these devices are provided. An intercom system including an intercom master unit having a connection terminal, wherein the interphone master unit determines whether a device connected to the connection terminal is an intercom, depending on a state of a changeover switch provided for the connection terminal. It is determined whether the device is a slave or a device having a contact.

[0013] In the intercom system according to the third aspect, the intercom master unit outputs a ringing tone when the standby voltage drops to a predetermined value at the connection terminal determined to be connected to the intercom slave unit. On the other hand, when the standby voltage drops to a predetermined value at the connection terminal that is determined to be connected to a device having a contact while starting power supply required for a call, a ringing tone is output. No power is supplied.

[0014] In the intercom system according to the fourth aspect, the intercom master unit may determine whether or not the intercom base unit has a connection terminal by changing the state of a changeover switch provided for the connection terminal.
A different ringing tone is output when the standby voltage drops to a predetermined value.

[0015] In the intercom system according to the fifth aspect, at least one of the devices having a contact is a call button for closing the contact when a button is operated, or
The wireless contact output receiver closes a contact when a predetermined wireless signal is received.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a main configuration of an intercom system of the present invention.

In this system, the intercom master unit 1 connects the intercom handset 2 having a call function to the connection terminal T1 thereof, and the connection terminal T2 does not have the call function and has a contact. Call button 3 is connected. This system can also be configured by applying a television intercom master unit and a camera-equipped door phone slave unit in place of the intercom master unit 1 and door phone slave unit 2.

The intercom base unit 1 has an internal configuration as shown in FIG. 2, and the configuration is the same as that shown in FIG. 7A, except that the connection terminals T1 and T2 are The feature is that the software processing has been changed to share with the call button 3.

That is, when the intercom master unit 1 supplies a 5 V voltage to the connection terminals T1 and T2 by the standby power supply circuit 10, the terminal voltages of the connection terminals T1 and T2 are:
As described above, the following operation is performed using the fact that the voltage becomes 1.5 V when the intercom slave unit 2 is connected, and the voltage becomes 5 V when the call button 3 is connected.

FIG. 3 shows a flowchart of such an operation. If a device is connected to the connection terminals T1 and T2 (100), the intercom master unit 1 connects to the connection terminal T
It is determined whether the terminal voltage of T1 and T2 is 1.5 V or 5 V (101).
1, it is recognized that the intercom slave unit 2 is connected to T2 (102).

At this time, when the call button of the intercom slave unit 2 is operated (103), this is detected by the call detection circuits 11, 1
2 (104), the communication power supply circuit 13 supplies power of a voltage value necessary for the operation of the communication circuit (described above) of the intercom slave unit 2 and the main unit 1 main body,
A predetermined ringing sound, for example, a ringing sound such as “ping-pong ping-pong” is output from the intercom slave unit 2 that called (10).
5) After that, if there is a response by operating the talk button of the base unit 1, the talk circuit 16 operates, and the talk with the intercom slave unit 2 that called is possible (106).

On the other hand, when the terminal voltage of the connection terminals T1 and T2 is 5
If it is V (107), it is recognized that the call button 3 is connected to the connection terminals T1 and T2 (108). At this time, when the call button 3 is operated (109), this is detected by the call detection circuits 11 and 12 (11).
0), a predetermined ringing sound, for example, a ringing sound such as “ping-pong ping-pong” is output (111).

When the equipment is connected to the connection terminals T1 and T2 (100), and when the terminal voltage is neither 1.5 V nor 5 V (101, 107), an abnormality such as disconnection / short-circuit of the wiring, equipment, etc. Is not connected, and even if the voltage fluctuates at the connection terminals T1 and T2, it is ignored (112).

Here, an example in which two connection terminals are provided in intercom master unit 1 has been described. However, the present invention is not limited to this example. For example, as shown in FIG.
Three connection terminals T1 to T3 are provided, and these connection terminals T
Each of 1 to T3 may be shared by the intercom slave unit 2 and the call button 3. Here, the connection terminal T1
Not only the call button 3 but also any device having a contact without a call function other than the wireless contact output receiver 4 can be connected to T3. FIG.
Reference numeral 5 denotes a wireless transmitter that closes its contact by transmitting a predetermined wireless signal to the wireless contact output receiver.

FIG. 5 shows another example of the intercom master unit. In the intercom master 1A, in addition to the configuration of the intercom master 1 described above, the equipment connected to the connection terminals T1 and T2 corresponds to one of the connection terminals T1 and T2, A doorphone / switch for setting which one of the buttons 3 is provided, and a doorphone / button for detecting the setting state of the switch SW.
A call button detection circuit 19 is further added.

In this intercom master unit 1A, if the changeover switch SW is provided, for example, corresponding to the connection terminal T2,
The connection terminal T2 can be used as a shared terminal, and it is determined whether the device connected to the connection terminal T2 is the intercom slave unit 2 or the call button 3 according to the on / off state of the changeover switch SW. A series of processing including this determination processing is the same as the processing shown in the flowchart of FIG.

Note that, depending on the state of the changeover switch SW,
At the connection terminal, the ringing tone output when the standby voltage drops to a predetermined value may be made different. In this case, in step 105 of FIG. For example, while outputting a ringing sound such as “ping-pong ping-pong”, step 1 in FIG.
At 11, the intercom master 1A outputs a ringing tone such as "pu-pu-poo".

[0028]

As can be understood from the above description, in the intercom system according to the first aspect of the present invention, the intercom master unit has a common connection terminal for connecting the intercom slave unit and a device having contacts. Therefore, the connection terminal can be shared by the intercom slave unit and the call button, the number of connection terminals can be reduced, and the cost can be reduced.

Also, it is determined whether the device connected to the connection terminal is a door phone slave device or a device having a contact point based on the difference in the standby voltage, so that the device connected to the connection terminal is the door phone slave device. This is convenient because it is not necessary to separately set the device or the device having the contacts.

In the intercom system according to the second aspect, the intercom master unit has a common connection terminal for connecting the intercom slave unit and a device having a contact, similarly to the first embodiment. The connection terminal can be shared between the device and the call button, the number of connection terminals can be reduced, and the cost can be reduced.

Further, it is determined whether the device connected to the connection terminal is an intercom slave unit or a device having a contact point according to the state of the changeover switch provided for the connection terminal. By simply performing the above operation, it is possible to arbitrarily select whether the connection terminal is to be used for a door phone slave unit or a device having a contact.

In the intercom system according to the third aspect, the intercom master unit outputs a ringing tone when the standby voltage drops to a predetermined value at the connection terminal determined to be connected to the intercom slave unit. On the other hand, when the standby voltage drops to a predetermined value at the connection terminal that is determined to be connected to a device having a contact while starting power supply required for a call, a ringing tone is output. No power is supplied.
Both devices with contacts can be connected.

In particular, when the standby voltage drops to a predetermined value at a connection terminal determined to be connected to a device having a contact, a ringing tone is output, but power supply required for a call is not performed. Power consumption can be suppressed, and a large current does not flow through a device having a contact, so that safety is improved.

[0034] In the intercom system according to the fourth aspect, the intercom master unit may be connected to the connection terminal at a connection terminal depending on a state of a changeover switch provided for the connection terminal.
Since the ringing tone output when the standby voltage drops to a predetermined value is made different, it is possible to easily confirm whether the call is from a door phone slave unit or a device having contacts.

In the intercom system according to the fifth aspect, at least one of the devices having a contact is a call button for closing the contact when a button is operated, or
Because it is a wireless contact output receiver that closes the contact when receiving a predetermined wireless signal, the common connection terminal of the TV intercom master unit, as a device having a contact,
A call button or a wireless contact output receiver can be connected, which is convenient.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a main configuration of an intercom system of the present invention.

FIG. 2 is a diagram illustrating an example of an internal configuration of an intercom master unit.

FIG. 3 is a flowchart for explaining an operation of the intercom master unit.

FIG. 4 is a diagram showing another example of a main part configuration of the intercom system of the present invention.

FIG. 5 is a diagram showing another example of the internal configuration of the intercom master unit.

FIG. 6 is a diagram showing a conventional intercom system.

FIG. 7 is a diagram showing an internal configuration of a conventional intercom master unit.

FIG. 8 is a diagram showing an internal configuration of a door phone slave unit.

FIG. 9 is a diagram for explaining a voltage change of a connection terminal when a doorphone slave device is connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Intercom master unit 2 ... Door phone slave unit 3 ... Call button 4 ... Wireless contact output receiver T1-T3 ... Connection terminal SW ... Changeover switch

Claims (5)

[Claims] 1. An intercom master unit having at least one intercom slave unit having a calling function, at least one device having no contact function and having contacts, and at least two connection terminals for connecting these devices. The intercom master unit, the device connected to each connection terminal according to the difference of the standby voltage of each connection terminal, the doorphone slave device, the device having the contact An intercom system that determines which one it is. 2. An intercom master unit having at least one intercom slave unit having a calling function, at least one unit having no contact function and having contacts, and at least two connection terminals for connecting these devices. In the intercom system, the interphone master unit is configured such that, depending on a state of a changeover switch provided for a connection terminal, a device connected to the connection terminal is connected to the doorphone slave unit and the contact. An intercom system that determines which of the devices it has. 3. The intercom master unit outputs a ringing tone when a standby voltage drops to a predetermined value at a connection terminal determined to be connected to the intercom slave unit, and supplies power necessary for a call. On the other hand, at the connection terminal that is determined to be connected to the device having the contact, when the standby voltage drops to a predetermined value, a ringing tone is output, but power supply required for a call is not performed. The intercom system according to claim 1. 4. The intercom master unit changes the ringing tone output when the standby voltage drops to a predetermined value at the connection terminal depending on the state of a changeover switch provided for the connection terminal. Claims 1 to 3
The intercom system according to any one of the above. At least one of the devices having the contact is a call button that closes a contact when a button is operated or a wireless contact output receiver that closes a contact when a predetermined wireless signal is received. The intercom system according to any one of claims 1 to 4.