JP3519914B2 - Doorphone for two households - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom system for two households, and more particularly, to an intercom slave installed in a common entrance of a two-family house, in which a call button pushes a connection line between a parent household and an intercom master of the child household. It relates to a two-door intercom device for switching to the one that has been operated.

2. Description of the Related Art Conventionally, a two-door intercom system as shown in FIG. 2 has been proposed. The intercom system for two households shown in FIG. 2 includes an intercom slave unit BQ51 attached to a common entrance of a two-family house and two-line parent-household connection lines L51 and L52.
The parent household intercom master AQ51 connected to the intercom slave BQ51 via the telephone and the two-line child household connection line L5
3 and L54, which is connected to the intercom slave unit BQ51 via the intercom slave unit AQ52. Two
The parent household connection lines L51 and L52 are the terminals T on the parent household side, respectively.
51, T52 and slave unit side terminals T53, T54 are connected.
The two-line child household connection lines L53 and L54 are connected between the child household side terminals T61 and T62 and the child machine side terminals T63 and T64. The parent household intercom master device AQ51 and the child household intercom master device AQ52 are generated and transmitted from the intercom slave device BQ51 and transmitted via the two-line parent household connection lines L51 and L52 or the two-line child household connection lines L53 and L54, respectively. Call detection section 7 to which loudspeaker speakers SP71 and SP81 for emitting a ringing sound (loud sound) generated from the called ringing signal are connected.
1 and 81, and call circuits 72 and 82 to which handset devices 73 and 83 each of which includes a speaker and a microphone for transmitting and receiving a voice signal for a call are connected. Handset 7
Reference numerals 3 and 83 are connected to parent household side terminals T51 and T52 and child household side terminals T61 and T62, respectively, via communication circuits 72 and 82, respectively. In addition, the output side is a loud speaker SP71, SP
The respective input sides of the call detection circuits 71, 81 connected to the 81 are the parent household side terminals T51, T52 and the child household side terminals T61, T.
It is connected to 62 respectively. The intercom slave unit BQ51 has a parent household call button SW51 and a child household call button SW52 that perform a pressing operation for calling the parent household intercom master device AQ51 and the child household intercom master device AQ52, respectively, and one of the above-described call buttons is pressed. Power adapter 52
And relays RY51 and RY52 that operate in conjunction with each other by the current supplied from the power supply circuit 51, a light emitting diode D51 and a light receiving transistor Q51 that form a photocoupler.
, Door phone circuit 54, and two-line parent household connection line L5
The connection line switching circuit 55 provided with relay switches 56 and 57 for selecting and switching either one of the 1, L52 and the two-child household connection lines L53 and L54 by the operation of the relays RY51 and RY52, and the above-mentioned switching. A speaker SP51 and a microphone MIC51 for transmitting and receiving a voice signal for a call to and from the base unit called via each two-line connection line,
Normally, a small amount of electric current is supplied from each base unit to the intercom slave unit B.
Night indicator light LE to distinguish the position of Q51 even at night
D51 and are provided. The switching contact 56a of the relay switch 56 and the switching contact 57a of the relay switch 57 provided in the connection line switching circuit 55 are connected to the intercom circuit 54, respectively. Also, relay switch 5
The normally closed contact 56b and the normally open contact 56c of No. 6 are connected to the slave unit side terminals T53 and T63, respectively. Further, the normally-closed contact 57b and the normally-opened contact 57c of the relay switch 57 are connected to the slave-side terminals T54 and T64, respectively. In the conventional intercom system for two households shown in FIG. 2 configured as described above, for example, the parent household intercom base unit AQ51
When the parent household calling button SW51 of the intercom slave device BQ51 is pressed to call the relay, the relay RY51 is generated by the current through the power adapter 52 and the power supply circuit 51.
Is turned on and the relay RY52 is turned off, and this current is used as a calling signal by the light emitting diode D which forms the photocoupler.
51 and the intercom circuit 54 via the light receiving transistor Q51
Entered in. Relay RY51, RY by this calling signal
By the operation of 52, the relay switch 5 of the line switching circuit 55
By closing the normally closed contact 56b of No. 6 and the normally closed contact 57b of the relay switch 57, respectively, a call signal is input to the terminals T53 and T54 on the child device side, and the two-wire parent household connection line L
51, L52, and is transmitted to the parent household intercom master unit AQ51, and the call detection circuit 71 is operated to operate the intercom slave unit BQ.
Loudspeaker SP that the call from 51 was detected
It can be confirmed by emitting a ringing sound (loud sound) from 71, and the speaker S of the intercom slave BQ51 via the two-line parent household connection line L51, L52 using the handset 73.
It is also possible to send and receive a voice signal for a call between the P51 and the microphone MIC51. At this time, the child household intercom base unit AQ61 is in a standby state. In the above description, the parent household calling button SW51 of the intercom child device BQ51 is pressed to call the parent household intercom master device AQ51, but the child household calling button SW52 is pressed to call the child household intercom master device A.
Even when Q52 is called, it is generated from the calling signal via the two-line child household connection lines L53 and L54 selected by switching the relay switches 56 and 57 by the connection line switching circuit 55 in the same manner as described above. It is possible to confirm the calling by emitting a ringing sound (loudspeaking sound) from the loudspeaker SP81, and the intercom slave BQ
It is also possible to send and receive voice signals for calling 51. still,
At this time, the parent household intercom base unit AQ51 is in a standby state. Furthermore, from the parent household intercom master unit AQ51 or the child household intercom master unit AQ52 connected to the relay switches 56 and 57, the two-line parent household connection lines L51 and L52 or the two child household connection lines L53 and L54 are connected. The night indicator LED 51 is constantly lit by the supplied small current.

However, since the conventional intercom system for two households is configured as described above, a two-line connection line connected to the parent household intercom master unit and the child household intercom master unit is provided. There is a drawback in that the current for operating the connection line switching circuit for switching must be supplied through the power adapter. The present invention has been made in order to solve such a problem, and a small current supplied from a parent household intercom parent device and a child household intercom parent device affects a connection line of two wires and a night indicator light. It is an object of the present invention to provide a two-door intercom device that can be switched to the master unit whose call button is pressed without using the current supply from the power adapter by storing electricity so that there is no effect. .

A two-door intercom device of the present invention that achieves the above object comprises an intercom slave unit,
The intercom slave unit includes a parent household intercom master unit and a child household intercom master unit that are connected to the intercom slave unit via a two-line parent household connection line and a two-line child household connection line, respectively. Machine and child household intercom Interacting with one of the parent household call button circuit and child household call button circuit that generate and send a call signal to call the parent machine, and one of the parent household call button circuit and child household call button circuit operated by the call Connection door switching circuit for switching the intercom slave to one of the two-line parent household connection line and the two-line child household connection line, and a parent household call button circuit and a child household call button circuit
The current for operating the connection line switching circuit connected to each of the above is stored by the current supplied from the parent household intercom master unit and the child household intercom master unit during standby, and the current is supplied to the connection line switching circuit when calling. And a switching capacitor for supplying current for switching operation.
In such a two-door intercom system of the present invention, a two-line parent-household connection line connected between the parent-household intercom base unit and the intercom slave unit, and a connection between the child-intercom intercom master unit and the intercom slave unit. In order to select and switch the two-line child household connection line on the intercom slave,
Using a capacitor via a rectifying bridge connected to the two-line connection line on the doorphone handset side, a certain small current is stored during standby, and when calling, the stored small current is supplied as a discharge current to supply power. By doing so, the two connection lines are selected and switched. Further, the night indicator light is turned on by the small current supplied from each parent device.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a two-door intercom system according to the present invention will be described below with reference to the drawings. The intercom system for two households shown in FIG. 1 is an intercom slave BQ1 attached to a common entrance of a two-family house, and a parent household connected to the intercom slave BQ1 via two-line parent household connection lines L1 and L2. The intercom master unit AQ1 and the intercom master unit AQ2 of the child household are connected to the intercom slave unit BQ1 via the two-line child household connection lines L3 and L4. The two parent household connection lines L1 and L2 are connected between the parent household side terminals T1 and T2 and the child machine side terminals T3 and T4, respectively. Also, the two-line child household connection lines L3, L4 are connected between the child household side terminals T11, T12 and the child machine side terminals T13, T14, respectively. A parent household intercom master device AQ1 and a child household intercom master device AQ2 are generated and transmitted from the intercom slave device BQ1 and transmitted via the two-line parent household connection lines L1 and L2 and the two-line child household connection lines L3 and L4, respectively. Call detection circuits 21 and 3 which operate by the input of the ringing signal
1 and a loudspeaker S for emitting a ringing sound (loud sound) generated by the ringing detection circuits 21 and 31 by the ringing signal described above.
P21 and SP31, and call circuits 22 and 32 to which handset devices 23 and 33 each of which includes a speaker and a microphone for transmitting and receiving a voice signal for a call with the intercom slave unit BQ1 are connected are provided. The handsets 23 and 33 are the communication circuit 22,
The terminals T1 and T2 on the parent household side and the terminals T11 and T12 on the child household side are connected via 32, respectively. Further, the input sides of the call detection circuits 21 and 31 whose output sides are connected to the loudspeakers SP21 and SP31 are the parent household side terminals T1 and T, respectively.
2. Connected to the child household side terminals T11 and T12, respectively. The intercom slave unit BQ1 has rectifying bridges 5 and 6 and rectifying bridges 5 and 6 respectively connected to the above-mentioned two-line parent household connecting lines L1 and L2 and child household connecting lines L3 and L4.
Switching electricity storage devices 3 and 4 which are respectively connected to 6 and which are stored with a constant small current during standby and discharged when calling,
A press operation is performed to call the parent household intercom base unit AQ1 and the child household intercom base unit AQ2, and the discharge currents from the above-mentioned switching storage devices 3 and 4 are generated as calling signals to generate relay signals RY1, RY2 or relay RY3. RY4
, A parent household call button circuit 2 for sending out in conjunction with, and a light emitting diode D1, D2 and a light emitting diode D1, which form a photocoupler and emit light by the discharge current from the switching storage batteries 3, 4. The light-receiving transistors Q1 and Q2 for receiving the light generated and transmitted from D2, the doorphone circuit 7, and the two-line connection line connected to the called master unit when the calling signal is input from the doorphone circuit 7 Relay switch 9, 10, 11, for selecting
A connection line switching circuit 8 for switching 12 by the operation of relays RY1, RY2, RY3, RY4, a speaker SP1 and a microphone MIC1 for transmitting and receiving a voice signal for calling with the called master unit, and a parent household Night indicator LED that constantly lights up with a small current supplied from intercom base unit AQ1 and child household intercom base unit AQ2
1, LED2, dummy circuits 13a and 13b, NPN type transistors Tr1 and Tr2, and resistors R3 to R8 are provided. Further, the parent household call button circuit 1 and the child household call button circuit 2 have call buttons SW1 and SW2, respectively.
It is composed of relays RY1, RY2 and RY3, RY4 that operate when the call button SW1 or SW2 is pressed, and the switching storage devices 3, 4 are resistors R1, R2 and a capacitor C1,
C2 and C2 respectively. Between the base and collector of the NPN transistors Tr1 and Tr2, light emitting diodes D1 and D2 forming a photo coupler and call buttons SW1 and S are formed.
W2 and resistors R3 and R5 are connected to each other, and resistors R4 and R6 are connected between the base and emitter of the NPN type transistors Tr1 and Tr2, respectively. The collectors of the NPN transistors Tr1 and Tr2 are light emitting diodes D1 and
Rectifying bridge 5, via D2 and resistors R1 and R2,
6, the emitters of the NPN transistors Tr1 and Tr2 are connected to the other (-) parts of the rectifying bridges 5 and 6, respectively. Night indicator light LED1, LED2 has a resistor R7 at one end
It is connected to the (+) part which is one of the rectification sides of the rectification bridges 5 and 6 via R8 respectively, and the capacitor C
One ends of 1 and C2 are also connected to the (+) part which is one of the rectifying sides of the rectifying bridges 5 and 6 via resistors R1 and R2, respectively. On the other hand, the other ends of the night indicator lights LED1 and LED2 and the other ends of the capacitors C1 and C2 are connected to the other (−) part of the rectification bridges 5 and 6 on the rectification side. One of the AC input sides of the rectifying bridges 5 and 6 has a parent household connection line L1.
Is connected to the child terminal T3 connected to the child terminal and the child household connection line L3 is connected to the child terminal T13 connected to the child terminal, and the other of the rectifying bridges 5 and 6 on the AC input side is connected to the parent household connecting line. L2 connected terminal side terminal T4 and child household connection line L4 connected terminal side terminal T1
Connected to 4 respectively. The normally closed contact 9b of the relay switch 9 of the connection line switching circuit 8, the normally closed contact 10b of the relay switch 10, the normally open contact 11b of the relay switch 11, and the normally open contact 12b of the relay switch 12 are connected to the intercom slave 7. ing. On the other hand, the normally open contact 9c of the relay switch 9 and the normally open contact 10c of the relay switch 10 are connected to the dummy circuit 13a, and the normally closed contact 11c of the relay switch 11 and the normally closed contact 12 of the relay switch 12 are connected.
c is connected to the dummy circuit 13b. Further, the switching contacts 9a, 10 of the relay switches 9, 10, 11, 12
a, 11a and 12a are connection terminals T3, T4 and T on the entrance slave side
13 and T14, respectively. The operation of the intercom system for two households of the present invention configured as described above will be described below. In order to store the current consumed for operating the connection line switching circuit 8 immediately after the operation of pressing the call button SW1 or SW2 of the intercom slave unit BQ1 in the standby state, the parent household intercom master unit AQ1 and the child household intercom Of the currents supplied from the master unit AQ2 to the rectifier bridges 5 and 6 through the two-line parent household connecting lines L1 and L2 and the child household connecting lines L3 and L4, respectively, the above-mentioned two connecting lines are connected. The capacitor C1 is connected via the resistors R1 and R2 constituting the switching storage devices 3 and 4 so that the influence and the night indicator lights LED1 and LED2 are not affected.
Alternatively, the night indicator LED1 and LED2 are stored in C2.
When the call button SW1 of the parent household call button circuit 1 is pressed in order to call the parent household intercom master unit AQ1 in the state where each is turned on, the current stored in the capacitor C1 of the switching electricity storage device 3 is Is discharged, the relays RY1 and RY2 operate and
The NPN transistor Tr1 becomes active, and a calling signal is input to the doorphone circuit 7 via the light emitting diode D1 and the light receiving transistor Q1 which form a photocoupler. Also, by operating the relays RY1 and RY2,
The normally closed contact 9b of the relay switch 9 and the normally closed contact 10b of the relay switch 10 are closed, and the normally open contact 11b and the relay switch 12 of the relay switch 11 are closed.
Since the normally open contacts 12b of the two are opened respectively, the two-line parent household connection lines L1 and L2 are selected, and the call signal from the intercom circuit 7 is transmitted through the connection line switching circuit 8 to the slave side terminals T3 and T4. Is output from. This calling signal is transmitted through the two parent-household connecting lines L1 and L2 to the parent-household connecting terminal T1,
When the signal is input to T2, the ringing detection circuit 21 is operated and a ringing sound (loud sound) is emitted from the loud speaker SP21. Also,
When the parent household intercom master device AQ1 is in a calling state, the handset 23 of the parent household intercom master device AQ1 and the speaker SP1 and microphone of the intercom slave device BQ1 via the communication circuit 22 and the two-line parent household connection lines L1 and L2 It is possible to send and receive voice signals for communication between MIC1.
When the parent household intercom master unit AQ1 is called, the child household intercom master unit AQ2 is in the standby state.
In the above, the intercom slave unit BQ1 called the parent household intercom master unit AQ1, but when calling the intercom master unit AQ2 in the standby state, the call button S
By depressing W2, the small current stored in the capacitor C2 of the switching electricity storage device 4 is discharged, and the relays RY3, R
By supplying power to Y4, the relay switches 11 and 12 of the connection line switching circuit 8 are respectively switched and the two-line child household connection lines L3 and L4 are selected. Therefore, the two-line child household connection line L3, A call signal is transmitted to the child household intercom base unit AQ2 via L4, and the call detection circuit 31
To activate the ringing sound from the loud speaker SP31 (loud sound)
Is emitted. Further, when the child household intercom base unit AQ2 is in a calling state, the handset 33 of the child household intercom base unit AQ2 and the speaker SP1 of the intercom subunit BQ1 via the communication circuit 32 and the two-line child household connection lines L3 and L4.
It is also possible to send and receive a voice signal for a call between the microphone MIC1 and the microphone MIC1. In addition, child household intercom base unit AQ
When 2 is called, parent household intercom base unit AQ1
Is in standby mode. In the above embodiment, the dummy circuit is provided in order to enable transmission and reception of the video signal multiplexed with the audio signal, but the dummy circuit may be removed when the video signal is unnecessary.

As is apparent from the above description, according to the two-door intercom system of the present invention, the small current supplied to each intercom slave unit from each master unit of two households is supplied to each two-line connection line. Since there is a switching storage device that is stored and used so that it will not affect the influence of the above and the night indicator light, it will be connected to each base unit for two households without receiving the power supply from the separately installed power adapter. It is possible to select and switch the two connecting lines that are connected.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a two-door intercom system of the present invention.

FIG. 2 is a block diagram showing a conventional intercom system for two households.

[Explanation of symbols]

AQ1 ... Parent household Intercom Base unit AQ2 ‥‥‥ Child household intercom Base unit BQ1 ‥‥‥ Doorphone cordless handset 1 ... Call button circuit for parent household 2 ‥‥‥ Child household call button circuit 3, 4, ... switching storage battery 8 Connection line switching circuit LED1, LED2 ... Night indicator light L1, L2 ..... Two-line parent-household connection line L3, L4 ..... Two-line child household connection line

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04M 9/00-9/10

Claims (2)

(57) [Claims] 1. An intercom slave unit (BQ1) is connected to the intercom slave unit via a two-line parent household connection line (L1, L2) and a two-line child household connection line (L3, L4), respectively. A parent household intercom master unit (AQ1) and a child household intercom master unit (AQ2) are provided, and the intercom slave unit generates and sends a call signal to call the parent household intercom master unit and the child household intercom master unit, respectively. A parent household call button circuit (1) and a child household call button circuit (2), and one of the parent household call button circuit and the child household call button circuit operated by the call, and the intercom slave unit A connection line switching circuit (8) for switching to one corresponding to the parent household connection line of the line and the child household connection line of the two lines, the parent household call button circuit and the front Household
A current for operating the connection line switching circuit that is connected to each of the call button circuits is stored by the current supplied from the parent household intercom master unit and the child household intercom master unit during standby, and the current is stored when calling. An intercom system for two households, wherein the connection line switching circuit includes a switching power storage device (3, 4) for supplying a current for the switching operation. 2. The intercom slave includes the switching power storage device and
2. The intercom system for two households according to claim 1, further comprising night indicator lights (LED1, LED2) connected in parallel and each of which is turned on by an electric current supplied from the parent household intercom master unit and the child household intercom master unit. .