JP4414108B2 - Intercom device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interphone device, and more particularly, to an interphone device in which a handset can be retrofitted to an interphone device that performs a call in a loud state as a hands-free door phone.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of intercom apparatus, the one shown in FIG. 2 is known.
[0003]
In the figure, the conventional intercom apparatus includes an entrance slave unit 10 installed at the entrance and an indoor master unit 30 installed indoors. The entrance slave unit 10 is connected to the indoor master unit via the trunk line L10. 30.
[0004]
The entrance handset 10 is composed of a handset speaker 110, a handset microphone 120, a handset hybrid circuit 130, a call button 140, and a handset call detection circuit 150. The handset speaker 110 and handset microphone 120 are The call button 140 is connected to the trunk line L10 via the slave unit call detection circuit 150. The call button 140 is connected to the trunk line L10 via the slave unit hybrid circuit 130.
[0005]
The indoor parent device 30 includes a power supply circuit 310, a speech path changeover switch 320, a voice switch 330 including a parent device hybrid circuit 340 and a comparator 350, a parent device speaker 360, a parent device microphone 370, and a parent device call detection circuit. 380, indoor base unit CPU 390, and base unit call button 400. Here, the voice switch 330 has a function of switching the transmission state or the reception state by comparing the signal level of the transmission sound and the signal level of the reception sound when talking with the front door 10 in a loud state. Yes. Thus, the indoor base unit CPU 390 is connected to the base unit hybrid circuit 340, the base unit call detection circuit 380, and the base unit call button 400 constituting the speech path switch 320, the voice switch 330, and the base unit hybrid circuit 340 includes A parent speaker 360 and a parent microphone 370 are connected via a comparator 350 constituting the voice switch 330. The trunk line L10 is connected to a power supply circuit 310, a speech path changeover switch 320, and a parent device call detection circuit 380. The speech path changeover switch 320 is connected to a parent device hybrid circuit 340 constituting the voice switch 330. .
[0006]
Next, the operation of the intercom apparatus configured as described above will be described.
[0007]
First, in the standby state, power is supplied from the power supply circuit 310 to each part (circuit) of the front door 10 via the trunk line L10. In addition, power is supplied to each unit (circuit) of the indoor base unit 30 from a power supply unit (not shown).
[0008]
When the visitor presses the call button 140, a call detection signal is output from the child device call detection circuit 150, and this call detection signal is sent to the parent device call detection circuit 380 of the indoor parent device 30 via the trunk line L10. Is done. When such a call detection signal is detected by indoor base unit CPU 390, a call signal is output from indoor base unit CPU 390, and this call signal is sent to base unit speaker 360 via voice switch 330. As a result, a ringing tone sounds from the parent device speaker 360.
[0009]
Here, when a resident in the room who confirms a call from a visitor by pressing the ringing sound from the parent unit speaker 360 presses the parent unit call button 400, a switching signal is output from the indoor parent unit CPU 390, and this switching signal Is sent to the speech path changeover switch 320, and the speech path changeover switch 320 is connected to the voice switch 330 side based on this switching signal.
[0010]
As a result, a communication path is formed between the main unit speaker 360 and the main unit microphone 370 and the sub unit speaker 110 and the sub unit microphone 120 via the trunk line L 10, and a loudspeaking call based on an automatic alternate call using the voice switch 330 is established. To do.
[0011]
[Problems to be solved by the invention]
In this way, in the conventional intercom device, as a hands-free door phone, it is possible to make a call between the front door unit and the indoor base unit in a loud state, but furniture is installed in front of the indoor base unit due to limited space etc. In this case, it is difficult to talk in a loud state as a hands-free door phone because the distance from the indoor base unit is large, and when the indoor resident becomes deaf due to aging, the visitor's There were difficulties such as difficulty in listening to voice. For this reason, in an intercom device that talks in a loud state as a hands-free door phone, there is a problem that the intercom device must be replaced.
[0012]
The present invention has been made in order to solve such a problem, and is configured so that a handset can be retrofitted to an interphone device that calls in a loud state as a hands-free door phone, so that the loudspeaker state as a hands-free door phone. It is an object of the present invention to provide an intercom apparatus that has both a function of making a phone call and a function of making a call using a handset.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, an interphone device according to the present invention is an interphone device that makes a voice call in a loudspeaker state as a hands-free door phone between an indoor cordless handset and a voice switch using an entrance cordless handset. Provided with a communication path changeover switch for switching the communication path between the slave unit and the voice switch, and a master unit modular jack connected to the speech path changeover switch, and having a handset modular jack that can be connected to the master unit modular jack. A handset with a built-in hybrid circuit , a hook switch for entering a call, and a detection circuit for detecting a switching operation of the hook switch. The handset modular jack and the handset modular jack allow the handset to be used indoors. It is connected to the master unit, detecting circuit operated by the power supply to the handset off Upon detection of a hookup of click switches, it is characterized by having an indoor base unit CPU for controlling the speech path switching switch to be switched call path base unit jack side entrance door station from the voice switch side .
[0014]
According to the interphone device of the present invention, since a handset can be retrofitted to an interphone device that makes a call in a loud state as a hands-free door phone, when furniture is installed in front of the indoor base unit due to limited space Even when the resident in the room becomes deaf or hard of hearing, the voice of the visitor can be easily heard by picking up the handset.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment to which an interphone device of the present invention is applied will be described in detail with reference to the drawings.
[0016]
FIG. 1 shows a block diagram of the intercom apparatus of the present invention. In the figure, the intercom apparatus according to the present invention includes an entrance cordless handset 1 installed at the entrance, an indoor base phone 3 installed indoors, and a handset 5 that can be connected to the indoor base phone 3. The front cordless handset 1 is connected to the indoor parent device 3 via the trunk line L1, and the handset 5 is detachably connected to the indoor parent device 3 via the curl cord L2.
[0017]
The entrance child device 1 includes a child device speaker 11, a child device microphone 12, a child device hybrid circuit 13, a call button 14, and a child device call detection circuit 15. The child device speaker 11 and the child device microphone 12 are configured as follows. The call button 14 is connected to the trunk line L1 via the slave unit call detection circuit 15 through the slave unit hybrid circuit 13.
[0018]
The indoor parent device 3 includes a power supply circuit 31, a speech path changeover switch 32 having first and second terminals 32a and 32b, a voice switch 33 including a parent device hybrid circuit 34 and a comparator 35, and a parent device speaker. 36, a parent device microphone 37, a parent device call detection circuit 38, an indoor parent device CPU 39, a parent device call button 40, and a parent device modular jack 41. Here, the voice switch 33 has a function of switching the transmission state or the reception state by comparing the signal level of the transmission sound and the signal level of the reception sound when talking with the front door 1 in a loud state. Yes. Thus, the indoor parent device CPU 39 is connected to the parent device hybrid circuit 34, the parent device call detection circuit 38, the parent device call button 40, and the parent device modular jack 41 constituting the communication path changeover switch 32 and the voice switch 33. A base unit speaker 36 and a base unit microphone 37 are connected to the unit hybrid circuit 34 via a comparator 35 constituting the voice switch 33. The trunk line L1 is connected to the power supply circuit 31, the speech path changeover switch 32, and the parent device call detection circuit 38, and the first terminal 32a that constitutes the speech path changeover switch 32 has a parent device that constitutes the voice switch 33. In the hybrid circuit 34, a master unit modular jack 41 is connected to the second terminal 32b.
[0019]
The handset 5 is composed of a handset speaker 51, a handset microphone 52, a handset hybrid circuit 53, a hook switch 54, a handset detection circuit 55, and a handset modular jack 56. Here, the handset speaker 51 and the handset microphone 52 are connected to the handset modular jack 56 via the handset hybrid circuit 53, and the hook switch 54 is connected to the handset modular jack via the handset detection circuit 55. 56.
[0020]
Next, the operation of the intercom apparatus of the present invention configured as described above will be described. In addition, since the point which talks in a loud state as a hands-free door phone between the main | base station unit 3 and the main | base station 3 using the voice switch 33 is the same as that of the conventional intercom apparatus, detailed description is abbreviate | omitted here. The operation when the curl cord L2 is connected between the base unit modular jack 41 of the indoor base unit 3 and the handset modular jack 56 of the handset 5 will be mainly described.
[0021]
First, in the first embodiment, when the curl cord L2 is connected between the main unit modular jack 41 and the handset modular jack 56, a connection signal is sent to the indoor main unit CPU 39, and this connection signal is transmitted to the indoor main unit CPU 39. When detected, power is supplied from the power supply unit (not shown) that supplies power to each part (circuit) of the indoor base unit 3 to the handset detection circuit 55 via the curl cord L2 under the control of the indoor base unit CPU 39. Is supplied from the indoor parent device CPU 39, and this switching signal is sent to the speech path switching switch 32. Based on this switching signal, the speech path switching switch 32 is connected to the second terminal 32b, that is, the second terminal 32b side. It is connected to the base unit modular jack 41 side.
[0022]
In this state, when a visitor presses the call button 14, a call detection signal is output from the child machine call detection circuit 15, and this call detection signal is detected via the main line L1. It is sent to the circuit 38. When such a call detection signal is detected by the indoor parent device CPU 39, a calling signal is output from the indoor parent device CPU 39, and this call signal is sent to the parent speaker 36 via the voice switch 32. A ringing tone sounds from the machine speaker 36.
[0023]
Here, when a resident in the room who has confirmed the call from the visitor picks up the handset 5 by the ringing sound ringing from the main unit speaker 36, the hook switch 54 is switched, and the curl code L2 is sent from the power supply circuit 31. Then, power is supplied to the handset hybrid circuit 53, the handset speaker 51, and the handset microphone 52 of the handset 5 to perform a call. As a result, a handset call can be performed.
[0024]
Next, in the second embodiment, when the curl cord L2 is connected between the base unit modular jack 41 and the handset modular jack 56, a connection signal is sent to the indoor base unit CPU 39, and this connection signal is sent to the indoor base unit CPU 39. Is detected from the power supply unit (not shown) that supplies power to each part (circuit) of the indoor base unit 3 to the handset detection circuit 55 via the curl cord L2 under the control of the indoor base unit CPU39. Power is supplied.
[0025]
In this state, when a visitor presses the call button 14, a call detection signal is output from the child machine call detection circuit 15, and this call detection signal is detected via the main line L1. It is sent to the circuit 38. When such a call detection signal is detected by the indoor parent device CPU 39, a calling signal is output from the indoor parent device CPU 39, and this call signal is sent to the parent speaker 36 via the voice switch 32. A ringing tone sounds from the machine speaker 36.
[0026]
Here, when a resident in the room who has confirmed a call from a visitor picks up the handset 5 by a ringing sound ringing from the main unit speaker 36, the hook switch 54 is switched, and a hookup detection is detected from the handset detection circuit 55. A signal is output, and this hook-up detection signal is sent to the indoor base unit CPU 39 via the curl code L2. Then, a switching signal is output from the indoor base unit CPU 39, and this switching signal is sent to the speech path switching switch 32. Based on this switching signal, the speech path switching switch 32 is connected to the second terminal 32b side, that is, the master unit modular jack. 41 is connected. Thus, power is supplied from the power supply circuit 31 to the handset hybrid circuit 53, handset speaker 51, and handset microphone 52 of the handset 5 via the curl code L2.
[0027]
As a result, a speech path is formed between the handset speaker 51 and handset microphone 52 and the handset speaker 11 and handset microphone 12 via the curl cord L2, the speech path switch 32 and the trunk line L1, and the handset is used. The call that was received is established.
[0028]
In the state described above, when the next visitor presses the call button 14 when the call button 14 is pressed, the call path switch 32 is switched to the first terminal 32a side by the control of the indoor parent device CPU 39 . You can switch back to hands-free calling.
[0029]
【The invention's effect】
As is clear from the above description, according to the intercom device of the present invention, a handset can be retrofitted to an interphone device that makes a call in a loud state as a hands-free door phone. Even when furniture is installed on the front of the room, or when a resident in the room becomes deaf due to aging, the voice of the visitor can be easily heard by picking up the handset.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of an intercom apparatus according to the present invention.
FIG. 2 is a block diagram showing an embodiment of a conventional intercom apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Entrance cordless handset 3 ... Indoor | base station master 32 ... Communication path switch 33 ... Voice switch 39 ... Indoor base unit CPU
41 ... Master unit modular jack 5 ... Handset 56 ... Handset modular jack 53 ... Hybrid circuit (handset hybrid circuit)
54 ... Hook switch
55. Detection circuit (handset detection circuit)

Claims (1)

An interphone device for making a voice call in a loudspeaker state as a hands-free door phone between the main door unit (1) and the indoor base unit (3) using the voice switch (33), wherein the indoor main unit includes the front door unit and the A speech path changeover switch (32) for switching a speech path between voice switches, and a master unit modular jack (41) connected to the speech path changeover switch;
A handset modular jack (56) connectable to the base unit modular jack, a hybrid circuit (53) for making a call with the entrance handset , a hook switch (54) for entering the call, and the hook switch A handset (5) with a built-in detection circuit (55) for detecting the switching operation of
When the handset is connected to the indoor base unit by the base unit modular jack and the handset unit modular jack, and the detection circuit that operates by supplying power to the handset detects the hook switch hookup, An intercom apparatus comprising an indoor master unit CPU (39) for controlling the speech path switching switch so that a slave unit can be switched from the voice switch side to the master unit modular jack side.

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