JP2000049952A - Interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily discriminate a visitor making a call operation from a family coming home based on the difference of a ringing call tone pattern. SOLUTION: In the case of a call by a visitor that depresses a call switch 10 of an entrance slave set 1 installed at a house entrance, a call detection circuit 20 of an in-room master set 2 installed in the house detects the call, a call speaker 24 sounds a call tone for the visitor through a 1st call tone generating circuit 21, and in the case of a call by a family coming home or the like, a signal stream S11 with a prescribed frequency band is sounded from a remote control speaker 43 through the operation of a remote control call switch 3 that can only be carried by the family and the sound is received by a slave set microphone 13 of the entrance slave set 1, the call detection circuit 20 of the in-room master set 2 detects the call and a 2nd call tone generating circuit 22 allows the speaker 24 to sound the family use call tone to unlock the house entrance for a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom apparatus, which can easily determine a visitor before answering a call such as a telephone call based on a difference in a ringing pattern of a ringing sound at the time of calling, and perform an operation of the apparatus. The present invention relates to an intercom device for improving convenience.

[0002]

2. Description of the Related Art Conventionally, as this type of intercom apparatus, an intercom apparatus having a configuration shown in a block diagram of FIG. 3 has been proposed. The intercom apparatus shown in the figure is usually a door-to-door slave unit 51 installed at the entrance of a dwelling unit (dwelling unit entrance).
And an indoor master unit 52 installed in the dwelling unit and connected to the main entrance unit 52 via a line L51, and an electric lock 55 installed in the dwelling unit and connected to the indoor main unit 52 via a line L55. Have been.

[0003] The entrance slave unit 51 is depressed (call operation) when a visitor or a family member calls a resident in a dwelling unit at home.
A call switch 60, a display lamp 61 which is always lit by a power supplied from the indoor master unit 52 (not shown) via a line L51, and a caller who has performed a call operation or a family member who returns home. Speaker 62 and handset microphone 6 used to establish a call with a resident in the dwelling unit
And a two-wire / four-wire conversion circuit 64 to which a line L51 is connected to the two-wire side and a handset speaker 62 and a handset microphone 63 are respectively connected to the four-wire side. 6
4 is a call switch 60 having the other end connected to the reference potential point.
And an indicator light 61 connected to a reference potential point via a resistor R51.

The indoor master unit 52 detects a call when the call switch 60 of the entrance slave unit 51 is depressed, and a call which is activated by the control of the call detection circuit 70 and outputs a ring tone signal S53. A sound generation circuit 71, a ring tone amplifier 72 that amplifies the ring tone signal S53 output from the ring tone generation circuit 71, a ring speaker 73 that rings a ring tone with the ring tone signal S53 via the ring tone amplifier 72, The called resident of the dwelling unit is connected to the base unit speaker 74 and the transmitting amplifier 77 connected to the receiving amplifier 76 used for establishing a call with the visitor who performed the calling operation or the family when returning home. And a two-wire / four-wire conversion circuit 78 to which the line L51 is connected to the two-wire side, the input side of the receiving amplifier 76, and the output side of the transmitting amplifier 77 are connected to the four-wire side. Eteori, 2-wire 4-wire conversion circuit 7
8 has a ring tone generating circuit 71 and a ring tone amplifier 72 on the output side.
Call detection circuit 7 connected to call speaker 73 through
The input side of 0 is connected.

The indoor master unit 52 further includes an unlock switch 80 for unlocking an electric lock 55 installed at the entrance of the dwelling unit, and an electric lock driving circuit 7 operated by operating the unlock switch 80.
9 and a drive relay 79a.
Is connected to the electric lock 55 via the line L55.

In the intercom apparatus configured as described above, a visitor or a family member at the time of returning home calls a resident in the dwelling unit so that the entrance slave unit 51 installed at the entrance of the dwelling unit can be used.
Is pressed, the two-wire / four-wire conversion circuit 6
A call signal S51 is sent from 4 through a line L51 to a main entrance device 52 installed in the dwelling unit.

The call signal S51 input to the indoor parent device 52 is input to the call detection circuit 70 via the two-wire / four-wire conversion circuit 78, and the call detection circuit 70 receives the call signal S51 from the entrance child device 51 from the input call signal S51. A call detection signal S52 that has detected a call
To the ringing tone generation circuit 71. The ringing tone generation circuit 71 that has detected the ringing detection signal S52 outputs a ringing tone signal S53 for sounding the ringing speaker 73. This ringing tone signal S53 is amplified via the ringing tone amplifier 72 and is sounded as a ringing tone on the calling speaker 73, so that the resident in the dwelling unit is notified of the call from the entrance cordless handset 51.

The resident in the dwelling unit who uses the resident in the dwelling unit to confirm the call from the entrance cordless handset 51 is used by the resident in the dwelling unit to determine the visitor who performed the calling operation or the family when returning home. Base speaker 74 and base microphone 75
The caller 76 and the transmitter amplifier 77, the two-wire / four-wire conversion circuit 78, the line L51, and a visitor who has performed a call operation via the two-wire / four-wire conversion circuit 64 of the entrance cordless handset 51 or a family member when returning home are Slave speaker 62 and slave microphone 6 to be used
The voice signal S60 is transmitted / received via the communication path formed between the three, and the communication is established, and then each is determined.

[0009] Then, when the family at home or the like is determined,
By operating the unlock switch 80, the electric lock 55 installed at the entrance of the dwelling unit was unlocked to bring the family into the dwelling unit.

[0010]

However, since the conventional intercom apparatus is configured as described above,
When a call is made from the entrance cordless handset 51 installed at the entrance of the dwelling unit, the resident in the called dwelling unit uses the indoor base unit 52 to answer the call and perform a call operation or return home until a call is established. There was a problem that it was not possible to discriminate the family at the time. Therefore, there is a problem that the crime prevention and safety when calling from a suspicious visitor or the like who cannot distinguish the child are insufficient, especially when only the child is in the house. Further, when it is determined that the family member has returned home, the electric lock 55 installed at the entrance of the dwelling unit must be unlocked to bring the family member into the dwelling unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and it is intended to provide a ringing tone generated by an indoor master unit installed in a dwelling unit when a call is made from an entrance slave unit installed in a dwelling unit. By distinguishing the pattern between the ringing tone for the visitor and the ringing tone for the family, the resident in the called dwelling unit can call the family based on the difference in the ringing pattern of the ringing sound. It is an object of the present invention to provide an intercom device that can distinguish calls from a user, thereby improving security and security and improving the convenience of operation of the device.

[0012]

In order to achieve the above object, an intercom apparatus according to the present invention detects a call by a call detection circuit of an indoor master unit by pressing a call switch of a main unit installed at the entrance. And the first ringing tone is transmitted through the first ringing tone generating circuit to make the calling speaker ring, and a call is made using the slave unit speaker of the entrance slave unit, the slave unit microphone, the master unit speaker of the indoor master unit, and the master unit microphone. And an intercom device for unlocking the electric lock at the entrance by operating the indoor master unit, and a remote control call switch for sounding a signal sequence of a predetermined frequency from the remote control speaker and inputting the signal sequence to the slave unit microphone of the entrance slave unit. A second ringing tone generation circuit for receiving a signal sequence, detecting a ringing in a ringing detection circuit, and ringing a ringing speaker as a second ringing tone, and operation of the second ringing tone generation circuit It is characterized in that it comprises an electric lock driving circuit for a predetermined time unlocking the front door of the electric lock on.

According to such an intercom apparatus, when a visitor or a family member calls a resident in the dwelling unit at the entrance of the dwelling unit, the call operation at the entrance slave unit of the visitor, the return operation, etc. Using the remote control call switch that can be carried only by the family, the ringing pattern of the indoor main unit installed in the dwelling unit can be distinguished between the ringing tone for the visitor and the ringing tone for the family. By this, the resident of the called dwelling unit can determine the call from the visitor or the family at the time of returning home based on the difference in the pattern of the ringing sound to be ringed, and from the family at the time of returning home or the like. In this case, the electric lock at the entrance can be unlocked for a predetermined time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment to which an intercom apparatus according to the present invention is applied will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of an intercom apparatus according to the present invention.
Only the entrance slave unit 1 installed at the entrance of the dwelling unit (dwelling unit entrance), the indoor master unit 2 installed in the dwelling unit and connected to the entrance entry unit 1 via the line L1, and only the family of the resident in the dwelling unit It is composed of a remote control call switch 3 which is portable and can be appropriately operated (call operation) at the time of calling, and an electric lock 5 installed at the entrance of the dwelling unit and connected to the indoor master unit 2 via a line L5.

The entrance slave unit 1 is supplied via a line L1 from a call switch 10 to be pressed (call operation) when a visitor calls a resident in a dwelling unit, and an indoor master unit 2 not described in detail. Indicator light 11 constantly lit by power supply
Handset speaker 1 used to establish a call with the resident in the dwelling unit called by the visitor who performed the calling operation
2. Line L1 is connected to the slave unit microphone 13 via the line connection terminal T1 on the two-line side, and slave unit speaker 1 is connected to the four-line side.
2. a two-wire / four-wire conversion circuit 14 to which each of the slave unit microphones 13 is connected; one end of the call switch 10 having the other end connected to the reference potential point;
Indicator lights 11 connected to the reference potential point via the resistor R1 are connected.

The indoor master unit 2 includes a call detection circuit 20 for detecting a call from a visitor or a family member when returning home.
And a first ringing tone signal S3 activated by the control of the call detecting circuit 20 to notify a call from a visitor.
, A second ringing signal S13 having a signal pattern different from that of the first ringing signal S3 for notifying a call from a family member when returning home or the like.
And a ring tone amplifier 23 that amplifies the first and second ring tone signals S3 and S13 output from the first and second ring tone generating circuits 21 and 22, respectively. A ringing speaker 24 for generating different patterns of ringing tones (ringing for visitors and ringing for families) by the first and second ringing tone signals S3 and S13 via the ringing tone amplifier 23; The resident in the dwelling unit is connected to a main unit speaker 25 and a transmitting amplifier 28 connected to a receiving amplifier 27 used for establishing a call with a visitor who has mainly performed a calling operation at the entrance slave unit 1. A connected base unit microphone 26;
A bandpass filter 29 that allows only a signal in a specific frequency band to pass therethrough, a line L1 connected to a 2-wire side via a line connection terminal T2, an input side of a receiving amplifier 27 and an output of a transmitting amplifier 28 to a 4-wire side A two-wire / four-wire conversion circuit which is connected to each side, an electric lock drive circuit 31 and a drive relay 31a which are driven for a predetermined time when the second ringing tone generating circuit 22 operates, and 30 is connected to an input side of a ring detection circuit 20 connected to a ringing speaker 24 via a first ringing tone generating circuit 21 and a second ringing tone generating circuit 22 and a ringing tone amplifier 23 at an output side. The input side of the pass filter 29 is connected to a connection point between the 4-wire side of the 2-wire 4-wire conversion circuit 30 and the input side of the receiving amplifier 27, and the output side is connected to the input side of the call detection circuit 20.

The remote control call switch 3 is depressed when the family calls a resident in the dwelling unit when the family returns home or the like, and the call switch 40 is activated when the call switch 40 is depressed. A signal sequence S11 having a predetermined frequency of 4 kHz (length 10 ms, pause time 10 ms) shown in FIG.
, A signal sequence generating circuit 41 for outputting
Sequence amplifier 42 for amplifying the signal sequence S11 output from the
And a remote control speaker 43 which is sounded by the signal train S11 through the signal train amplifier 42 and transmits the signal train S11 to the slave unit microphone 13 of the entrance slave unit 1, and the other end of the input side is connected to the reference potential point. The output side of the signal train generation circuit 41 to which one end of the connected call switch 40 is connected is connected to the signal train amplifier 4.
2 is connected to the remote control speaker 43.

The operation of the intercom apparatus configured as described above will be described below. When a visitor presses the call switch 10 of the entrance slave unit 1 installed at the entrance of the dwelling unit to call a resident in the dwelling unit, a call signal S1 is sent from the 2-wire 4-wire conversion circuit 14, and the line connection terminal T1 Are input to the line connection terminal T2 of the indoor slave unit 2 via the line L1.

The calling signal S1 input to the indoor master unit 2 is 2
The call detection circuit 20 is input to the call detection circuit 20 via the line-to-wire conversion circuit 30, and the call detection circuit 20 outputs a call detection signal S2, which detects a call from the entrance slave unit 1 by the visitor, from the input call signal S1 to a first call. The signal is sent to the sound generation circuit 21. The first ringing tone generation circuit 21 which has detected the input of the ringing detection signal S2
Outputs a first ringing tone signal S3 for ringing the calling speaker 24. This first ringing tone signal S3 is amplified via the ringing tone amplifier 23 and is ringed as a ringing tone for the visitor at the calling speaker 24, so that the resident in the dwelling unit is notified of the call by the visitor. You.

In order for the resident who has confirmed the call from the entrance slave unit 1 by the visitor to determine who the visitor is, the base unit speaker 25 and the base unit microphone used by the resident in the dwelling unit. 26, a receiving amplifier 27, a transmitting amplifier 28, a two-wire / four-wire conversion circuit 30, a line connection terminal T2,
The line L1, the line connection terminal T1 of the entrance slave 1, and the call speaker via the two-wire / four-wire conversion circuit 14 via the communication channel formed between the slave speaker 12 and the slave microphone 13 used by the visitor. It is possible to make a determination after transmitting and receiving the voice signal S10 based on the call response and establishing the telephone conversation.

Next, in order to allow the resident in the dwelling unit to know the resident in the dwelling unit when returning home, the entrance child unit 1
Remote control call switch 3 near the entrance of the dwelling unit where the
Is pressed, the signal train generation circuit 41
Is activated, and a signal train S11 shown in the pulse waveform diagram of FIG. 2 for sounding the remote control speaker 43 is output.
This signal sequence S11 is amplified via a signal sequence amplifier 42,
The remote control speaker 43 is sounded and transmitted to the slave unit microphone 13 of the entrance slave unit 1.

The signal sequence S11 input to the slave unit microphone 13 of the entrance slave unit 1 is the same as that at the time of calling by the visitor described above.
Line 4-wire conversion circuit 14, line connection terminal T1, line L1,
The signal is input to the two-wire / four-wire conversion circuit 30 via the line connection terminal T2 of the indoor master unit 2. The two-wire / four-wire conversion circuit 30 detects the input of the signal sequence S11, switches the signal transmission line of the signal sequence S11 from the connection to the call detection circuit 20 to the connection to the bandpass filter 29, and sends out the signal sequence S11. .
Therefore, the signal sequence S11 passes through the band-pass filter 29 and is input to the call detection circuit 20. The call detection circuit 20 sends to the second ringing tone generation circuit 22 a call detection signal S12 which detects a call from the remote control call switch 3 by a family member when returning home from the input signal sequence S11. The second ringing tone generating circuit 22 that has detected the input of the ringing detection signal S12 outputs a second ringing tone signal S13 for causing the calling speaker 24 to ring in a different pattern from that at the time of calling by the visitor. The second ringing signal S13 is output from the ringing amplifier 23.
And is ringed by the call speaker 24 as a ringing tone for family members having a different pattern from the ringing tone for visitors described above. Be informed. Second ringing tone generation circuit 2
2 operates, the electric lock driving signal S14 is transmitted to the electric lock driving circuit 3.
1, the electric lock drive circuit 31 makes the drive relay 31a closed, and unlocks the electric lock 5 installed at the entrance. Therefore, the resident in the called dwelling unit can secure crime prevention and safety without establishing a call by answering the call, and can unlock the dwelling unit, thereby improving the convenience of operation in the device. Is done.

In the above-described embodiment, the intercom apparatus has been described. However, the present invention is not limited to this. The present invention may be applied to a TV door phone device to which a playback function is added, and a visitor performing a call operation or a family at the time of returning home can be easily identified not only by a video but also by a difference in a ringing sound pattern. Becomes

[0024]

As is clear from the above description, according to the intercom apparatus of the present invention, when a visitor or a family member calls a resident in a dwelling unit at the time of returning home, the intercom apparatus is installed at the entrance of the visitor's dwelling unit. By the calling operation of the remote control calling switch which can be carried only by the family at the time of returning to the home, such as when returning home, the pattern of the ringing sound to be sounded by the indoor master unit installed in the dwelling unit is changed for the visitor. By distinguishing the ringing tone from the ringing tone for the family, the resident in the called dwelling unit distinguishes the calling from the visitor or the family at the time of returning home based on the difference in the ringing tone pattern. When a call is made from a family member when returning home, the door of the dwelling unit can be unlocked for a predetermined time without answering the call, and the convenience of operation of the device is improved. Security and safety for calls from suspicious visitors, etc. be unable to determine a child in the case where the body is answering machine is also improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of an intercom apparatus according to the present invention.

FIG. 2 is a pulse waveform chart showing a signal train transmitted from a remote control call switch of FIG. 1;

FIG. 3 is a block diagram showing a configuration of a conventional intercom apparatus.

[Explanation of symbols]

 1 ... Entrance cordless handset 2 ... Indoor master unit 3 ... Remote control call switch 5 ... Electric lock 10 ... Call switch 12 ... Child Machine speaker 13... Slave unit microphone 20... Ringing detecting circuit 21... First ringing tone generating circuit 22... Second ringing tone generating circuit 24. ..Calling speaker 25... Master speaker 26... Master microphone 31.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E203 AA02 BB08 BB62 DD02 EE02 FF24 FF39 5C087 AA44 BB03 FF01 FF02 FF24 FF25 5K027 AA09 FF01 FF25 5K038 AA06 CC02 DD16 EE05 FF01 GG06

Claims (1)

[Claims] A first ringing tone is detected by a call detection circuit (20) of an indoor master unit (2) by pressing a call switch (10) of an entrance slave unit (1) installed at the entrance. A first ringing tone is sent out through a generating circuit (21) to ring a ringing speaker (24), and the child speaker (12) and the child microphone (13) of the entrance slave and the master speaker of the indoor master. (25) An intercom apparatus for making a telephone call with the base unit microphone (26) and unlocking the electric lock (5) at the entrance by operating the indoor base unit, wherein a signal train (S11) of a predetermined frequency is transmitted. Remote control speaker (4
A remote control call switch (3) for sounding from 3) and inputting the signal to the slave unit microphone of the entrance slave unit, wherein the indoor master unit receives the signal sequence, performs a call detection in the call detection circuit, and performs a second call detection. A second ringing tone generating circuit (22) for sounding the ringing speaker as a ringing tone, and an electric lock driving circuit (31) for unlocking the electric lock at the entrance for a predetermined time when the second ringing tone generating circuit operates. ).