JPH11341168A - Interphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To very the sound volume (output level) of a calling confirmation sound to be rung at a front door slave device. SOLUTION: When a visitor depresses a calling switch 10 of a front door slave device 1, a calling detecting circuit 20 of an indoor master device 2 detects this, and allows a calling sound producing circuit 22a to ring a calling sound S21 to a receiver 23a for a handset of the indoor master device, and to ring calling confirmation sounds S31 and S32 to a speaker 11 of the front door slave device 1 so that the achievement of the calling can be announced to the visitor in this interphone device. In this case, the indoor master device 2 is provided with a timer circuit 21 for detecting the depressing time of the calling switch of the front door slave device 1 and a calling sound gain converting circuit 22d for muting a calling confirmation sound when the depressing time which is a prescribed value or more is detected by the timer circuit 21, and allowing the calling sound producing circuit 22a to output the calling confirmation sound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom apparatus, and more particularly, to an intercom apparatus capable of changing the volume (output level) of a call confirmation sound ringing at an entrance terminal.

[0002]

2. Description of the Related Art Conventionally, as this kind of intercom apparatus, an intercom apparatus shown in a block diagram of FIG. 2 has been proposed. The intercom apparatus shown in the figure is usually installed at the entrance of a dwelling unit (dwelling unit entrance) and inside the dwelling unit, respectively.
Entrance cordless handset 5 connected by two lines L51 and L52
1. An indoor master unit 52 is provided.

[0003] The entrance cordless handset 51 includes a call switch 60 which is pressed when a visitor calls a resident in the dwelling unit,
It is mainly used for establishing a call with a resident called by a visitor, and generates a call confirmation sound S81 by inputting a ring sound signal S61 output from a ring sound generation circuit 71 of the indoor master unit 52 described later. Entrance cordless handset speaker 6
1. Entrance unit microphone 62, microphone amplifier circuit 63 for amplifying and transmitting audio signal S90 input via entrance unit microphone 62, and maintaining the brightness near the periphery of the dwelling unit at night or the like. For this purpose, a night indicator light 64 that is turned on by power supply from the indoor master unit 52, which is not described in detail, is provided.

[0004] The indoor master unit 52 inputs a call signal S51 transmitted via a line L51 when the call switch 60 of the entrance slave unit 51 is pressed, and calls the entrance slave unit 51 from a visitor. By detecting the call detection circuit 70 to be detected and the call detection signal S52 output from the call detection circuit 70, the resident is notified of the call from the visitor of the entrance cordless handset 51, and the visitor is normally notified. Indoor parent device 52
A ringing tone generating circuit 71 for outputting a ringing tone signal S61 for notifying that the calling state is called, and a ringing tone mainly used by a resident to establish a call with a visitor, The receiver 72a includes a handset receiver 72a and a handset microphone 72b that sound a ringing tone S71 by inputting a ringing tone signal S61 output from the generation circuit 71.

[0005] In the intercom apparatus configured as described above, when the visitor presses the call switch 60 of the entrance cordless handset 51 to call the resident in the dwelling unit, the line L51
The call signal S51 is transmitted to the indoor master unit 52 via the terminal and input to the call detection circuit 70. The call detection circuit 70 receives the call signal S 51, detects a call from a visitor of the entrance cordless handset 51, and outputs a call detection signal S 52 to the ring tone generation circuit 71. The ringing tone generation circuit 71 that has detected the input of the call detection signal S52 notifies the resident of the call from the visitor of the entrance cordless handset 51 and notifies the visitor to the indoor master unit 5.
2 outputs a ringing tone signal S61 for notifying that the calling state is normal.

The ringing tone signal S61 is input to a receiver 72a for a handset constituting the handset 72, and the line L
And transmitted to the entrance terminal 51 via the entrance terminal 51 and the entrance speaker 6
1 is input. Therefore, a ringing tone S71 is sounded from the handset receiver 72a constituting the handset 72, a resident is notified of a call from a visitor of the entrance cordless handset 51, and a call confirmation sound S81 is sounded from the entrance cordless handset speaker 61. Then, the visitor is notified that the indoor master unit 52 is in a calling state in which the indoor base unit 52 is normally called.

Further, the resident who confirms the call from the visitor of the entrance slave unit 51 to the handset 72 by the ringing tone S71 which is sounded by the handset receiver 72a constituting the handset 72 of the indoor master unit 52, turns on the handset 72. Housing of indoor master unit 52 (not shown)
If you perform a response operation that picks up from
Hooked off (not shown), between the handset receiver 72a and handset microphone 72b that form the handset 72, and the handset speaker 61 and the handset microphone 62 of the handset 51 via the two lines L51 and L52. Was formed, and the transmission and reception of the audio signal S90 became possible via this communication path, and the communication was established.

[0008]

However, since the conventional intercom apparatus is configured as described above,
When a visitor calls a resident in the dwelling unit, a function for adjusting the volume (output level) of the call confirmation sound S81 that is sounded by the entrance terminal speaker 61 of the entrance terminal 51 is not added. In particular, when the above-described calling operation is performed at night, such as at midnight, the volume (output level) of the call confirmation sound S81 becomes excessively large, and there is a problem that the quietness of the surrounding environment of the dwelling unit is hindered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned difficulties. By adding a timer function (timer circuit) for detecting the time when the call switch of the entrance slave unit is pressed down to the indoor master unit. At the time of calling by a visitor, if the calling switch is pressed for a time equal to or greater than a predetermined threshold value set in the timer circuit of the indoor master unit,
It is an object of the present invention to provide an intercom apparatus capable of performing gain control (mute) of a volume (output level) of a call confirmation sound to be sounded by an entrance speaker of an entrance slave.

[0010]

In order to achieve such an object, an intercom apparatus according to the present invention provides a call detection circuit of an indoor master unit which detects when a visitor presses a call switch of an entrance slave unit. An interphone that informs a visitor that a call has been made by sounding a ringing tone from the ringing tone generation circuit to the handset receiver of the indoor master unit and simultaneously sounding a ringing confirmation sound at the entrance slave unit speaker of the entrance slave unit. The indoor master unit includes a timer for detecting a pressing time of a call switch of an entrance slave unit, and muting a call confirmation sound when the timer detects a pressing time equal to or more than a predetermined threshold. And a ring tone gain conversion circuit for outputting from a generation circuit.

According to such an intercom apparatus, a timer function (timer circuit) for detecting the time when the call switch of the entrance cordless handset is pressed down is added to the indoor master unit, so that when the visitor calls, If the call switch is pressed for a time equal to or greater than a predetermined threshold value set in the timer circuit of the indoor master unit, the volume of the call confirmation sound (output Level) can be gain controlled (muted).
In particular, when a call operation by a visitor is performed at night, such as at midnight, the quietness of the surrounding environment of the dwelling unit can be maintained.

[0012]

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 as an embodiment with reference to the drawings. The intercom apparatus shown in the block diagram of FIG. 1 is usually installed at the entrance of a dwelling unit (dwelling unit entrance) and inside the dwelling unit, and includes an entrance slave unit 1 and an indoor master unit 2 connected by two lines L1 and L2. Is done.

The entrance cordless handset 1 is used to establish a call with a call switch 10 that is pressed when a visitor calls a resident in a dwelling unit and a resident called by the visitor. The ringing tone signal S11 output from the ringing tone generation circuit 22a of the indoor master unit 2 and the ringing tone signal S12 whose gain is controlled (muted) through the ringing tone gain conversion circuit 22d are input. As a result, the entrance terminal speaker 11, the entrance terminal microphone 12, and the audio signal S40 input via the entrance terminal microphone 12 sounding the call confirmation sound S31 and the call confirmation sound S32 of different volumes (output patterns), respectively. A microphone amplifier circuit 13 for amplifying and transmitting the power, and a power supply from the indoor master unit 2 (not described in detail) in order to maintain the brightness near the entrance of the dwelling unit at night or the like. Nighttime display lamp 14 to be lit by
And

The indoor base unit 2 inputs a call signal S1 transmitted via the line L1 when the call switch 10 of the entrance unit 1 is pressed, and calls the entrance unit 1 from a visitor. A call detection circuit 20 for detecting a call;
And a timer circuit 21 for detecting the time when the call switch 10 is depressed within the time of a preset predetermined threshold value, A ringing tone generation circuit 22a for notifying a call from a visitor and outputting a ringing tone signal S11 for notifying the visitor that the indoor base unit 2 has been normally called up; An amplifier 22b for amplifying and transmitting the sound signal S11; and a relay switch 2 which is switched when the timer circuit 21 detects that the call switch 10 has been pressed for a time equal to or more than a predetermined threshold.
2c and a ring tone gain conversion circuit 22d that mutes the ring tone signal S11 via the switched relay switch 22c and outputs it as a ring tone signal S12 whose gain is controlled.
A handset receiver 23a which mainly uses the resident to establish a telephone call with the visitor and sounds the ringing tone S21 by inputting the ringing tone signal S11 output from the ringing tone generating circuit 22a. , Microphone for handset 23
b. Note that the above-mentioned ringing tone generation circuit 22a, amplifier 22b, relay switch 22
c, the ringing tone generating section 22 is constituted by the ringing tone gain conversion circuit 22d.

Of the line connection terminals T1 and T2 of the entrance slave unit 1 connected to the line connection terminals T11 and T12 of the indoor master unit 2 via the two lines L1 and L2, respectively, One end of the call switch 10 having the other end connected to the reference potential point, the anode of the night indicator lamp 14 having the cathode connected to the reference potential point, (the input side of) the entrance apparatus speaker 11, and the entrance apparatus microphone on the input side. The output side of the microphone amplifier circuit 13 to which the terminal 12 is connected is connected to each other.
A reference potential point is connected to the line connection terminal T2.

Of the line connection terminals T11 and T12 of the indoor master unit 2, the line connection terminal T11 has an input side of the ring detection circuit 20 and a ringing tone gain converter whose input side is connected to the normally open contact P3 of the relay switch 22c. The output side of the circuit 22d and the normally closed contact P2 of the relay switch 22c are connected respectively. The output side of the ring detection circuit 20 is connected to the input side of the timer circuit 21 and the line connection terminal T12. The output side of the timer circuit 21 is connected to the input side of the ring tone generation circuit 22a and the relay switch. The control input side of 22c is each connected. Further, the ringing tone generation circuit 22
The output side of a is connected to the switching contact P1 of the relay switch 22c, the transmitter / receiver 23a and the transmitter / receiver microphone 23b via the amplifier 22b.

In the intercom apparatus configured as described above, the volume (output level) of the call confirmation sound that is sounded by the entrance terminal speaker 11 of the entrance terminal 1 particularly at night, such as at midnight, is set lower than usual. The following describes the operation when the sound is made at a low level. When a visitor presses the call switch 10 of the entrance cordless handset 1 to call a resident in the dwelling unit, a call signal S1 is detected via the line connection terminal T1, the line L1, and the line connection terminal T11 of the indoor master unit 2. Input to the circuit 20. The call detection circuit 20 receives a call signal S1 and detects a call from a visitor of the entrance slave unit 1, and sends a call detection signal S2 to the timer circuit 21.
Is output.

The timer circuit 21 detects the time during which the call switch 10 of the entrance cordless handset 1 is depressed from the input call detection signal S2, so that the measured time is less than a predetermined threshold value of 3 seconds or less. Ringing tone generation circuit 22a
Only activate. Therefore, the activated ringing tone generation circuit 22a notifies the resident of the call from the visitor of the entrance cordless handset 1, and also informs the visitor that the indoor master unit 2 is in a normal calling state. A ringing tone signal S11 for notification is output.

The ringing tone signal S11 is amplified by the amplifier 22b, and is input to the handset receiver 23a forming the handset 23 and the switching contact P1 of the relay switch 22c. Therefore, the handset receiver 23a forming the handset 23
, A ringing tone S21 is sounded, and the resident is notified of the call from the visitor of the entrance slave 1. The ringing signal S11 input to the switching contact P1 of the relay switch 22c is
Entrance device speaker 1 via normally closed contact P2, line connection terminal T11, line L1, and line connection terminal T1 of entrance device 1.
1 is input. Accordingly, the call confirmation sound S31 is sounded from the entrance child device speaker 11, and the visitor is notified that the indoor master device 2 is in a calling state in which the indoor master device 2 is normally called.

On the other hand, the timer switch 21 to which the above-described call detection signal S2 has been inputted is used to operate the call switch 10 of the entrance terminal 1.
When the time during which the button is pressed is detected to be equal to or longer than the predetermined threshold value of 3 seconds, the relay switch 22c is switched by the control of the timer circuit 21, the normally open contact P3 is closed, and the ringing tone generation circuit 22a is activated. Activated. Therefore, the activated ringing tone generation circuit 22a notifies the resident of the call from the visitor of the entrance slave unit 1 as described above, and also sets the call state in which the indoor master unit 2 is normally called by the visitor. A ringing tone signal S11 for notifying that

This ringing tone signal S11 is signal-processed in the same manner as described above, and is input to a handset receiver 23a forming the handset 23, so that a ringing tone S21 is sounded and the resident is allowed to visit the entrance cordless handset 1 to the resident. , And is input to the ring tone gain conversion circuit 22d via the switching contact P1 of the relay switch 22c and the normally open contact P3 which is closed. The ringing tone gain conversion circuit 22d mutes the input ringing tone signal S11 and outputs it as a gain-controlled ringing tone signal S12. This ringing tone signal S12 is input to the entrance terminal speaker 11 via the line connection terminal T11, the line L1, and the line connection terminal T1 of the entrance terminal 1. Therefore, the call confirmation sound S32 that is lower in level than the volume (output level) of the call confirmation sound S31 that is sounded at the time of the normal call from the entrance speaker 11 is sounded. It is notified that indoor master unit 2 is in a calling state in which it is normally called. When the ringing tone (ringing confirmation tone) sounded at the time of the above-mentioned calling (calling state) ends, the relay switch 22c is switched to open the normally open contact P3 which is closed to prepare for a talking state described later.

Further, the ringing tone S21 generated by the handset receiver 23a constituting the handset 23 of the indoor master unit 2,
When the resident who has confirmed the call from the visitor of the entrance slave unit 1 performs a response operation to pick up the handset 23 from the housing (not shown) of the indoor master unit 2 by an appropriate method, the hook is turned off ( (Not shown), a receiver 23a for the handset, a microphone 23b for the handset, and two lines L
1. A communication path is formed between the entrance apparatus speaker 11 and the entrance apparatus microphone 12 of the entrance apparatus 1 via L2, and the transmission and reception of the audio signal S40 becomes possible through this communication path, thereby establishing a telephone conversation.

[0023]

As is clear from the above description, according to the intercom apparatus of the present invention, the indoor master unit has a timer function (timer circuit) for detecting the time when the call switch of the entrance slave unit is pressed down. When the call switch is pressed for a predetermined threshold or more in the timer circuit of the indoor master unit at the time of calling by the visitor by the addition, the speaker of the entrance slave unit of the entrance slave unit is added. It is possible to perform gain control (mute) on the volume (output level) of the ringing confirmation sound that is sounded, especially when the call operation by a visitor is performed at night, such as midnight, so that the surrounding environment of the dwelling unit is quiet. Sex can be maintained.

[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 a conventional intercom apparatus.

[Explanation of symbols]

 1 ... Entrance cordless handset 2 ... Indoor master unit 10 ... Call switch 11 ... Entrance cordless handset speaker 20 ... Call detection circuit 21 ... · Timer circuit 22a ···································································································· Paging Confirmation sound

Claims (1)

[Claims] When a visitor depresses a call switch (10) of an entrance cordless handset (1), a call detection circuit (20) of an indoor master unit (2) detects the call, and a call sound generation circuit (22a) detects the call. A ringing tone (S21) is sounded by the handset receiver (23a) of the indoor master unit and a ringing confirmation sound (S31, S32) is sounded by the entrance speaker (11) of the entrance slave unit. An intercom apparatus for notifying that a call has been made to a person, wherein the indoor master unit has a timer circuit (21) for detecting a pressing time of a call switch of the entrance slave unit, and a predetermined threshold value in the timer circuit. An intercom apparatus comprising: a ringing tone gain conversion circuit (22d) for muting the ringing confirmation sound when the pressed time is detected and outputting the ringing sound from the ringing tone generation circuit.