JP3040531B2 - Intercom equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device capable of making an outside-line call using a telephone and a door phone using the telephone.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional communication device. This communication device is a base unit 1 'provided indoors.
And a doorphone slave 2 provided outdoors such as at the entrance. The master unit 1 ′ and the doorphone slave 2 are connected by, for example, a two-core signal line 5. In this communication device, when a visitor presses the call button 4 provided on the door phone handset 2, a ringing tone is sounded from the speaker 6 provided in the base unit 1 ', and the base unit 1' is provided according to the calling sound. Handset (handset)
When 3 is picked up, a communication path between the intercom slave 2 and the master 1 'is formed, and the intercom can be performed.

By the way, telephone equipment is usually provided indoors, and in the case of the above-mentioned communication device, it is provided completely independently of the telephone equipment. Therefore, various systems are mixed indoors, which is not preferable. Therefore, there is provided a communication device capable of performing a normal telephone call (hereinafter, this call is referred to as an outside line call) together with a door phone call. This communication device is shown in FIG. In this communication device, a telephone 7 is connected to the parent device 1 "via a two-core signal line 8 in addition to the intercom slave 2, and external telephone calls can be performed using the telephone 7, and intercom calls can be performed using the telephone 7. It is.

In the case of this communication device, there is an advantage that the intercom system and the telephone system can be unified, and the telephone 7 can be enhanced in function.

[0005]

However, the communication apparatus shown in FIG. 6 has no means for performing a door phone call and an outside line call before the telephone 7 is attached, and cannot inspect the door phone call and the outside line call after the installation is completed. There was a problem. Note that such a situation occurs, for example, when a new house is constructed before moving in.

[0006] Further, when making a door phone call and an outside line call using the telephone 7, the handset must be picked up without fail, and there is an inconvenience that the intercom call and the outside line call cannot be performed when the hands are dirty in a kitchen or the like. is there. The present invention has been made in view of the above points, and an object of the present invention is to provide a communication device capable of performing a door phone call and an outside line call without using a telephone.

[0007]

According to the present invention, in order to achieve the above object, a hands-free call means for making a hands-free call and a switch for starting and ending a call using the hands-free call means are provided. When a hands-free call is made by a hands-free calling means when a door phone call is made, a communication path is formed between the hands-free calling means and the door phone handset. A communication path forming means for forming a communication path between the communication means and the telephone line is provided in the master unit.

[0008]

The present invention has the above-described structure,
Door phone calls and outside line calls can be made with the parent device,
In this system, a door phone call and an outside line call can be performed without a telephone. In addition, if the intercom and outside line calls can be performed by the parent device as described above, the intercom and outside line calls can be inspected even when no telephone is attached. For example, a new house before entering the house can be inspected. In this case, the intercom call and the outside call can be inspected. Further, intercom calls and there is no need to always perform intercom calls and external call pick up the handset, as is the case of performing the external call, intercom calls and external calls, even when dirty hands in the kitchen or the like using a telephone < can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
It is composed of a parent device 1, a door phone slave device 2 and a telephone 7, and FIG.
In the same manner as the above-described communication device, the outside telephone call can be performed together with the intercom call using the receiver of the telephone 7. In the present embodiment, the microphone 9 is provided on the base unit 1 to enable a hands-free intercom call and an outside line call. That is, the doorphone slave 2 is provided with the microphone 13 and the speaker 14 for making a call with the telephone 7, and the master 1
Is provided with a speaker 6 for sounding a ringing tone so that the base unit 1 can notify that there is an intercom call.
As described above, simply providing the microphone 9 on the master 1
Using the microphones 9 and 13 and the speakers 6 and 14 of both the telephone and the intercom 2 enables hands-free communication. However, in order to perform the hands-free call, it is necessary to provide a circuit, which will be described later, in the base unit 1. This circuit will be described later.

Hereinafter, the structure and circuit configuration of the parent device 1 will be described. As shown in FIG. 1, the base unit 1 includes external line connection terminals L ₁ and L _{2 to} which a telephone line is connected, extension line connection terminals T ₁ and T ₂ to which a telephone 7 is connected, and a door phone handset 2.
Are provided with intercom connection terminals D ₁ and D ₂ . As shown in FIG. 2, a modular jack 11 is used as the extension connection terminals T ₁ and T ₂ , and a modular plug 12 is attached to the end of a telephone cord which is a signal line 8 connecting the telephone 7 and the base unit 1. The telephone 7 can be detachably connected to the parent device 1.

The circuit configuration of the parent device 1 will be described with reference to FIG. The incoming call detection unit 15 detects an incoming call by detecting an incoming signal transmitted through a telephone line, and is provided, for example, to notify a user of an incoming call when there is an incoming call during a door phone call. It is. The hook detection unit 16 detects a hook state of the telephone 7 to detect a response state of the telephone 7 when a door phone is called.
The output of the hook detection unit 16 is used as a command for forming a communication path for a door phone call.

The control circuit 17 is constituted by a CPU, performs signal processing in accordance with the detection output of the incoming call detection unit 15 and the hook detection unit 16, detects the output of the incoming call detection unit 15 and the hook detection unit 16, and makes a call to be described later. The operation of each of the following units is controlled according to the operation of the switch 10. The switching circuit 18
For example, it is constituted by a relay, and two contacts of the relay are connected to external line connecting terminals L ₁ and L ₂ and internal line connecting terminals T ₁ and T ₁ , respectively.
It is inserted between the T _2. The switching circuit 18
Now, connect and disconnect the telephone 7 to the telephone line,
When the telephone 7 is disconnected from the telephone line, the telephone 7 is connected to the intercom slave unit 2. In the case of the present embodiment, the switching circuit 18 is switched so as to connect the telephone 7 to a normal telephone line, and when the receiver of the telephone 7 is picked up in response to a call from the intercom slave 2, The telephone 7 is connected to the door phone slave 2.

The current supply unit 19 is provided to supply a telephone current to the telephone 7 when the telephone 7 is disconnected from the telephone line by the switching circuit 18. Call circuit 2
Numeral 0 is provided in a door phone communication path, which is a communication path between the telephone 7 and the door phone slave unit 2 formed by the switching of the switching circuit 18, and amplifies both audio signals and transmits the signals in both directions. The communication circuit 20 is controlled by the control circuit 17 so as to operate only during door phone communication.

The call detector 21 detects a door phone call from the fact that the call button 4 of the door phone slave unit 2 has been pressed,
The detection output is given to the control circuit 17. Melody generator 22
Generates a ringing tone (for example, a "ping-pong" sound) under the control of the control circuit 17 when the intercom is called, and the melody generating unit 22 generates a pseudo ringing tone (for example, "lean / lean") at the time of an incoming call. Sound, etc.), and a ringing tone sounds from the speaker 6. When an incoming call is received during a door phone call, the incoming call can be notified.

The speech network 23 is a circuit for making a hands-free call using the microphone 9 and the speaker 6, and for example, a hands-free call circuit provided in an ordinary hands-free call device can be used. The speech network 23 is controlled by the control circuit 17 to operate only when a hands-free call is made. In the case of the present embodiment, the speech network 23, the speaker 6 and the microphone 9 constitute a hands-free communication means.

The call switch 10 is used to start a hands-free call and terminate the call. The control circuit 17 controls the switching of the communication path according to the operation of the communication switch 10. The outside line communication network 24 is a circuit for making an outside line call in a hands-free call,
Talking circuit 25 for transmitting voice signals in two directions almost in the same manner as talking circuit 20 for door phone talking, DC closing circuit 28 for capturing a telephone line during hands-free talking, and insulating calling circuit 25 from the telephone line. It comprises a transformer 27. The outside line communication network 24 is connected to the speech network 23 via a switch element 26 including a relay contact or the like.
The switch element 26 is controlled to be turned on and off to switch between an outside line call by the telephone 7 and an outside line call by the hands-free call of the base unit 1.

The operation of this embodiment will be described. In addition,
For an outside call using the telephone 7, since the switching circuit 18 is normally in a state where the telephone 7 is connected to the telephone line,
It is performed in the same way as a normal outside call. Therefore, detailed description is omitted. Now, the call button 4 of the door phone slave 2 is shown in FIG.
When a call is made from the intercom slave 2 by being pressed as shown in (a), this call is detected by the call detection unit 21 and
When the control circuit 17 drives the melody generating section 22, a ringing tone is sounded from the speaker 6 as shown in FIG.

When the telephone 7 answers the call, the receiver of the telephone 7 only needs to be picked up. That is, when the receiver of the telephone 7 is picked up, the hook detector 16 detects this, and the control circuit 17 which has received the detection output drives and controls the switching circuit 18. At this time, the telephone 7 is disconnected from the telephone line and connected to the intercom slave 2 via the communication circuit 20. Therefore, thereafter, the intercom can be performed with the intercom slave 2 using the telephone 7.
At this time, the speech network 23 is in an inactive state, so that the telephone 7 does not affect the intercom.

Next, a description will be given of a case where the base unit 1 responds to the above call by a hands-free call. In this case, the user may press the call switch 10 as shown in FIG. That is, when the call switch 10 is pressed, the control circuit 17 activates the speech network 23 so that the audio signal input from the microphone 9 is output to the communication circuit 20 and the audio signal input from the communication circuit 20 is output from the speaker 6. , And a hands-free intercom call can be performed between the parent device 1 and the intercom slave device 2 as shown in FIG. 3 (d).

In the case of a door phone call, the outside line communication network 24 is separated from the call path for the door phone call because the switch element 26 is opened. The switching circuit 18 keeps the state where the telephone 7 is connected to the telephone line. By the way, in the device for performing a hands-free call between the base unit 1 and the intercom slave unit 2 as described above, the call switch 10 is unnecessarily depressed due to the mischief of the child and the inter-unit call between the intercom unit 2 and the intercom unit 2 When a road is formed, there is a problem that indoor sound leaks. Therefore, only when the call switch 10 of the base unit 1 is pressed within a certain time period (for example, within 30 seconds) after the call is made, a call can be made with the intercom slave unit 2.

Then, when ending the call, FIG.
When the call switch 10 is pressed again as shown in (c), the control circuit 17 stops the operation of the speech network 23, and the call ends. Incidentally, δT ₁ ~δT ₃ in the Figure 3 shows the delay time for each operation.
A case will be described in which base unit 1 responds to an incoming call. First, when an incoming call is detected by the incoming call detection unit 15, in this case, the built-in bell of the telephone 7 rings as shown in FIG. Then, the pseudo ringtone shown in FIG. 4B is sounded from the speaker 6 of the parent device 1 by the pseudo ringtone generated by the melody generating unit 22. When the base unit 1 answers in response to the pseudo ring tone, the call switch 10 is pressed as in the case of the door phone call (FIG. 4C). At this time, the control circuit 17 operates the DC closing circuit 28 and closes the switch element 26 to connect the speech network 23 and the outside line communication network 24. That is, a communication path for an outside line communication by hands-free communication is formed. In this case, the switching circuit 18 is switched to disconnect the telephone 7 from the telephone line. This enables hands-free communication. That is, the hands-free calling means can be used exclusively for incoming calls on the outside line. Here, since the communication circuit 20 is in a non-operating state, the voice does not leak from the intercom slave unit 2 at the time of the outside line communication.

Then, in order to end the outside-line call by hands-free call, the call switch 10 may be pressed again. It should be noted that the telephone 7 does not respond to the intercom call and the incoming call.
In addition, the person who responds first with the base unit 1 can talk. In other words, it takes priority to pick up the receiver first or to press the call switch 10 for the call.

As described above, if the main unit 1 can perform the intercom call and the outside call, the intercom call and the outside call can be inspected even when the telephone 7 is not attached. For example, even in a case where the telephone is constructed in a new house before moving in, it is possible to inspect the door phone call and the outside line call. In addition, it is not necessary to pick up the receiver and perform the intercom call as in the case of the intercom call and the outside call using the telephone 7, so that the intercom call and the outside call can be performed even when the hands are dirty in a kitchen or the like. There are advantages that can be done.

When a hands-free call of this type is performed, the call switch 10 is pressed again at the end of the call to end the call, but the call end operation is often forgotten. Therefore, in order to prevent the forgetting of the call end operation, for example, the presence or absence of an audio signal in a communication path for a hands-free call is detected. May be used.

In the case of the present embodiment, when a door phone call and an outside line call are performed in a hands-free manner in response to a call, communication path forming means for forming respective communication paths for the outside line call and the door phone call are provided. Control circuit 17, switching circuit 18,
The communication circuit 20, the speech network 23, the outside line communication network 24, and the switch element 26 are configured.

[0026]

As described above, according to the present invention, a hands-free call means for making a hands-free call, a switch for starting and ending a call using the hands-free call means, and a hands-free call at the time of calling a door phone. Means to form a communication path between the hands-free communication means and the door phone handset when making a door phone call, and between the hands-free communication means and the telephone line when making an external call using the hands-free communication means when receiving a call. Since the base unit is provided with a communication path forming means for forming a communication path, a door phone call and an outside line call can be performed with the base unit, so that a door phone call and an outside line call can be performed without a telephone. In addition, if the intercom and outside line calls can be performed by the parent device as described above, the intercom and outside line calls can be inspected even when no telephone is attached. For example, a new house before entering the house can be inspected. In this case, the intercom call and the outside call can be inspected. In addition, since it is not necessary to pick up the receiver and perform the intercom and external calls as in the case of intercom and external calls using a telephone, the intercom can be used even when the hands are dirty in a kitchen or the like.
And outside line communication .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of a parent device according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram of a communication device.

FIG. 3 is an explanatory diagram of an operation when a parent device answers a door phone call.

FIG. 4 is an explanatory diagram of an operation in the case of responding to an outside line call by a parent device.

FIG. 5 is a system configuration diagram of a conventional example.

FIG. 6 is a system configuration diagram of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parent device 2 Door phone handset 6 Speaker 7 Telephone 9 Microphone 10 Talk switch 17 Control circuit 18 Switching circuit 20 Talk circuit 23 Speech network 24 Outside telephone network 26 Switch element

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Kato 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Shingo Nozaki 1048 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Works Co., Ltd. (56) References JP-A-3-58559 (JP, A) JP-A-59-90452 (JP, A) JP-A-64-73954 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name ) H04M 9/00 H04M 1/02 H04M 1/60 H04M 1/72 H04Q 3/58 107

Claims (1)

(57) [Claims] A telephone and an intercom slave unit are connected to a base unit, and a communication path is switched between a public telephone line and the telephone and between the telephone and the intercom slave unit to use an outside-line telephone call and a telephone. A call device for performing a door phone call, wherein a hands-free call means for performing a hands-free call,
A switch for starting and ending a call using the hands-free calling means, and forming a communication path between the hands-free calling means and the door phone handset when a door phone call is made by the hands-free calling means when the door phone is called. And a communication device in which a base unit is provided with a communication path forming means for forming a communication path between the hands-free communication means and the telephone line when making an outside line call with the hands-free communication means at the time of an incoming call. apparatus.