JPS59178855A - Interphone set - Google Patents

Abstract

PURPOSE:To attain indoor individual calling without increasing the number of indoor wirings by providing a switching device transmitting bi-directionally an address signal of individual calling via a receiving line and connecting an indoor calling signal receiver and a speaker of a device to be called only to a call line. CONSTITUTION:A handset of an indoor set is hooked off and a calling button designating a desired opposite indoor set is depressed. Since a transmission line (l) is energized by a constant current source 15, when any indoor set is hooked up, an output terminal of an amplifier 2 having a low impedance is connected to the transmission line (l) via a hook switch 3-1 and a potential Vl is dropped to an output terminal operating voltage of the amplifier 2. A calling switch 4 is closed by the depression of the calling button, and this potential Vl is dropped further. The call switch 4 is closed by the calling button and this potential Vl is dropped further. A master set M detects the drop of the potential Vl of the transmission line due to the depressing of the calling button, i.e., the closing of the calling switch 4, a latch circuit inverts switches SWA and SWB to change over the operating mode of the interphone set into the indoor talking state and also drive a chime tone generating circuit 10, which generates a call tone.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention provides a main unit/sub-main unit type intercom device that allows mutual communication between a plurality of indoor units and also allows individual calls between these indoor units. This is intended to omit wiring.

(Background of the Invention) A conventional intercom device having the configuration shown in FIG. 1 is known. In the same figure, M is family 1, sM(siν
``11-3) is the sub-master unit, D (Dl, I) 2) is the outdoor unit (
(commonly called door pong). The main unit M and the sub-main unit 18M have the same functions except that the DC power source of the intercom device and the circuit for external communication with the outdoor unit are built into the main unit M. Each of these indoor units, ie, the master unit M and the sub-master unit SM, is equipped with a handset including a microphone and a speaker. In addition, these indoor units are connected to each other by four indoor wirings consisting of a sending line, a receiving line, a calling line, and a common line, and the base unit M has an outdoor unit with a 2-way type. Connected via outdoor wire.

Between the indoor units, there is a transmitting arm and a receiving wire, each consisting of 4 wires.
A common telephone line of the communication path is formed, and when the handset is picked up, the microphone and speaker of the handset are connected to the transmitting arm and the receiving line, respectively. Therefore,
By picking up the handset in the indoor unit of the desired mantissa, a circuit from the microphone of one handset to the speaker of the other handset via the transmitting arm, the base unit M and the receiving line can be connected between the handsets. The indoor units are configured to have a handset-type mutual communication/)3'of function between these indoor units.

When the handset is placed at a predetermined position on the indoor unit, for example, when it is hung on a hook, the speaker of the handset is connected to the calling line. For this reason, the outdoor unit's ringing is performed for all indoor units, producing a "bing-pong" or "poro-boro" sound (if a ringing sound is not required, a ringing sound will not be generated for each indoor unit). ).

Then, by picking up the handset of one of the indoor units, the microphone of this handset, the transmitting arm, the outdoor communication circuit of base unit M, and the outdoor area are connected to the speaker of the outdoor unit. A mutual communication path is formed from the microphone of the outdoor unit to the speaker of the handset via the outdoor communication circuit, the outdoor communication circuit of the base unit M, and the receiving line. As a result, indoor fi
It is possible to talk to the outdoor unit from either M or SIV [.

By the way, in this intercom device, when making a call between rooms, after picking up the handset from one indoor unit, the indoor call button is operated to generate a ringing sound (for example, a "beeping sound"). In this case, if a call is made in the same way as when calling from an outdoor unit, all indoor units will generate a ringing tone, causing confusion. In order to avoid such a situation, one possible method is to use Morse code to determine the calling party, but this method is only applicable to the number of indoor stations or 2 to 3 stations. However, when there are multiple stations, it is impossible to use Morse code for each station (-j).For this reason, conventionally, as shown by the dotted line in Figure 1, a dedicated Morse code for indoor calls, A wire is wired between each indoor unit, but the number of wires is 2 + 2 wires when the number of indoor units is 1, which is inconvenient as there are many layout parameters and the wiring etc. work is complicated. .

(Aspects of the Invention) The present invention was made in order to eliminate the drawbacks of the conventional type described in L.
The intercom device, which is connected by an indoor arrangement including a telephone line and a call line, is connected to the intercom device, and the purpose is to make the call the first in town without increasing the number of intercom devices. .

(Structure of the Invention) In order to achieve the above object, the present invention provides a main unit/sub-main unit type intercom device having a plurality of indoor units interconnected by indoor wiring including a transmitting arm, a receiving line, and a calling line. and an indoor call signal transmitter/receiver which is connected to the receiver section and selects a called device by bidirectionally transmitting and receiving an address signal for individual calling through the receiver line to each of the indoor units.

The apparatus is characterized in that a switching device is provided for connecting only the speaker of the called machine to the calling line when the called machine is selected.

(Explanation of Examples) The present invention will be described in detail below using sections 1 and 24.

FIG. 2 shows the configuration of an intercom device according to the first embodiment of the present invention. In the same figure, the submaster unit SM is the microphone 1
, an amplifier 2, a hook switch 3 (3-L3-2), a calling switch 4, a sect calling signal transmitting/receiving circuit 5, a speaker 6, and the like. In addition, the main unit M has the same configuration with the same reference numerals as the sub-main unit SM, and also has an amplifier 7 for outdoor calls.
and /S (grid transformer 8, buffer amplifier 9 for indoor calls, outdoor units DI and D2 related to calls, and generates ring tones such as "bi-9-bong", "polo f-guchi", and "beep") depending on the type of indoor call The device is equipped with a chime sound generator 10, an amplifier 11 for driving the speaker 6 with the ringing sound, and a direct current '1 source (not shown).The container indoor unit M or SM usually has a microphone 1 and a speaker. 6 constitutes an integrated transmitter and receiver, and this transmitter normally sets the hook switch 3 of the unit inside the container to the position shown in the figure.Furthermore, when the transmitter is picked up, the hook switch 3 switches to the opposite direction. Note that in the present invention, the microphone IS and the speaker 6 do not necessarily have to be an integrated transmitter/receiver, but at least one of the microphone 1 and the speaker 6 may be used to switch the hook switch. is required.

A common side C1 transmission Ml is used between the units in these containers.

It is connected by four indoor wires consisting of receiving line, calling line, and IB. In this embodiment, an example has been given in which the indoor unit is composed of two indoor units, one main unit M and one sub-master unit SM, but it is also possible to use a plurality of sub-master units SM. In this case, all the submaster units SM are connected in parallel to the four indoor wirings.

Next, the operation of the intercom device shown in FIG. 2 will be explained.

In Q) in Figure 2, each switch SWA in the standby state
, SWB, SW1 to SW3, and the state of each contact of the hook switch 3.

When a call button is pressed on the door phone D1 (not shown), the potential between the base unit M and the door phone D1 outside the room drops, and the chime sound generating section 10 detects this potential and generates a ringing tone "Boro Boro". This ringing tone is also emitted from the speakers 6 of all the indoor units M and 8M via the amplifier 11 and the switch SW3 and hook switch 3-2 of each indoor unit M and SM. In response to this ringtone, indoor mm, 8r
When the handset is picked up at either V+, the amplifier 2 and speaker 6 of that room/unit are connected to the transmitting edge l and the receiving line, respectively. i.e. microphone]
The output is amplified by the amplifier 2 and sent to the transmission line l, and after being amplified by the amplifier 7 via the switch SWA, it is output to the door phone D1 via the high print transformer 8 and the switch SWL"l. be done.

In addition, the sound from the door phone D1 can be heard using the switch S'W.
D. Hybrid transformer 8 rollers and switch SW
B, the signal is sent to the receiving line via the amplifier 9 and the switch SW1, and can be heard from the speaker 6 via the switch SW2 and the hook switch 3-2.

Indoor talk 0: pick up the handset of the desired indoor unit, and then press a call button (not shown) specifying the desired partner indoor unit. The transmitter, 1, is a constant voltage, and is connected by the 1 source 15, so if the handset is hooked up in any room, this transmitter @l
The output end of the low impedance up 02 is connected to ff through the hook switch 3-1, and the ridge level Vl falls to the ridge. When the user lies down and presses the call button, the call switch 4 closes, and the potential 1 of B further drops. In the base unit M, when the call button is pressed, that is, when the call switch 4 is closed,
Detecting the drop in the W level Vl, the switches SWA, SW, 13 are reversed by a launch circuit (not shown), and the operation mode of this intercom device is switched to indoor call interruption, and the chime sound generating circuit 10 is driven to 1. Generates a ringing tone (“beep”). In conventional ink-phone devices, all the speakers of the indoor units in the hooked-down state of the handset were connected to the ringer B, so all of these indoor units generated ringing tones, and the called party I couldn't tell which side. In the present invention, switches S to ■3 are provided in the speaker 6 and the 1σ row, and the switches S to ■3 are provided in the speaker 6 and the 1σ row.
By picking up the acceptance (hookup), all switches SW3 are opened, and the called side switch SW3 is opened.
By omitting only 3, the ringing tone is generated only from the called machine, making it possible to make individual calls. (Distinguishing between the called machine and other indoor units) The indoor calling signal transmitting/receiving device uses the receiving line as a transmission path to perform transmitting/receiving operations by transmitting pulse codes. Note that during this indoor call, while the receiver line L is also disconnected from the buffer amplifier 9 by switch SW1, mutual communication by the handset is cut off, but it is only for a short time and the indoor call is in progress, so there is no difference. There will be no installation problems. In addition, the indoor room where you are about to perform the calling operation is 1 m
Or SM is hooked up and receives the call from speaker 6,
If this is done, the speaker 6 will also emit an indoor call signal. Switch SW2 is indoor 11
゛! The output/support and middle speakers 6 are separated from the receiving line.

During this basic call, the hookup was on the other hand F''3
The audio output from the microphone on the beach is amplified by the amplifier 2 and sent to the transmitter NWβ via the hook switch 3-1. In Oyasui M, the audio signal of this transmission 411 is input to the buffer amplifier 9 via 8WB.

It is sent to the receiving line via switch SWI. In the other indoor unit to which the handset is hooked up, the voice (signal) on the receiving line is emitted from the speaker 6 via the switch SW2 and the hook switch 3-2. A similar indoor communication path is formed between the above-mentioned one indoor unit and the speaker 6 of the above-mentioned one indoor unit, and thereby mutual communication between both indoor units can be performed. It is a flowchart showing the operation of a series of switches SW1 to SW3. Fig. 3 shows the transmission mode. In the standby mode, all the switches SW1 to SW3 are in the on (closed) state and turn on. When you pick up the phone, press the indoor call button, and set the Vl of the transmitter ML to ゛L level, 1.9 W 1 to 3 are all turned off, and the transmitter/receiver circuit 5 sends an address signal to the receiver line. When you release the call button (turn off), the standby state (SW
] to 3 all on).

FIG. 4 is a flowchart on the receiving side. When the calling (sending) side turns on the call switch 4 from the standby state and sets the transmitting IT position v7 to l L l'' level, this transmitting Kl is connected to all the indoor units, so it is the same as the calling side. SW to
1 to 3 are turned off. Note that the switch SWI is provided only on the master machine M, and is not on the sub-master machine 8M, but the operation is the same for the main machine M and the sub-master machine SM. When the handset is hooked up on the transmitting side and the call button is pressed, all SWs 1 to 3 on the transmitting and receiving sides are turned off, and the receiving line 1 is completely disconnected from the receiving circuit. It will be done. In this state, an address signal is sent from the transmitting/receiving device 5 on the transmitting side to the receiving line. The six transmitting/receiving devices 5 on the receiving side receive this address signal, compare it with a preset local address, and turn on the switch SW3 only when they match. As mentioned above, by transmitting a call and changing the position from Vl to 'L' level, the chime sound generation section sends out a ring tone "beep"0) to the calling station B, and the switch SW3 is turned on at the station to which the chime sound is emitted. When this happens, a ringing tone will be generated from speaker G.

Figure 5 shows an indoor call transmitter/receiver that transmits and receives address signals! A basic circuit example is shown. In the figure, reference numeral 21 denotes a transmitting/receiving one-word remote control IC, in which ED-5 manufactured by V Male Partex is used.

In normal standby mode 7, the ``1''/R terminal of the IC21 is set to ``L'' level and the receiving mode is set. In this state, terminal D
4 to G, the self address from the self-setting address section 22,
・υ) is input. Terminals 0JOC and OT are the same group clock generation circuit. Receiving the call from the transmitting side, dL ((The sent address signal is sent to S of IC21 via input/output section 23
After being input to the DI terminal and subjected to serial/parallel conversion, the terminals D4 to D6
is compared with its own address. When this academic/signal data matches the self address, the level of the D/D Q terminal is H''
''.If there is still received data, the level of this D/DO terminal becomes +l L II during reception.D/Do
The 'l-('' output of the terminal is input to the CP terminal of the monostable multi 24, and this monostable multi 24 holds the °1-■" level at the end of the next data. Switch S
W1 to W3 are composed of laso tin relays. switch S
The valley handling points of W 1 to 3 are normally in the standby state as shown in the figure, and when the transmitter fitting crown position Vl reaches the ゛L° level, it is reset by the launch circuit 25 and reversed, and furthermore, the monostable multi 24 When the output Q reaches the "H" level, only the switch SW3 is turned on.

At the time of transmission, by pressing the destination call switch 26, the IC 21 becomes at the T/几 terminal (IIl, I+ level), and the destination address is input to the terminals D4 to D6. The destination address input in parallel to the terminals D4 to D6 is output in series from the terminals D/DQ, but by turning off the analog switch 27, it is not applied to the CP terminal of the monostable multi 24, and is output from the analog switch 28. It is sent to the receiving line via the input/output section 23. On the other hand, T/R of IC21.

Terminal level becomes "■-1" L, OR-12
9, the transistor 3o is turned on, and the transmission line l is connected to the resistor 3.
1, the potential Vl becomes 'L'' level.

Note that this transmitter/receiver circuit 5 is composed of a C'-MOS, and the consumption power is extremely small, so a special power source is not required, and as shown in FIG. It can be driven by a diode 12 and a capacitor 13 which are connected to each other.

(Effects of the Invention) As described above, according to the present invention, during an individual call, the receiving line and speaker are disconnected from the communication circuit, and this receiving line is used as an address signal line, and the speaker of the indoor unit called by this address signal is Since only the call history is read, it is possible to make individual calls between indoor stations without installing additional indoor wiring. What's great about this is that you only need to install a ringing tone generation circuit and an amplification circuit for outdoor calls on the base unit, and the sub-base unit has a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a conventional intercom device, and FIG. 2 is a circuit diagram of an intercom device according to an embodiment of the present invention.
FIG. 5 is a circuit diagram showing a specific example of the individual paging signal transmitting/receiving device in FIG. 2. M... Parent (number, SM... Sub-base unit, C... Common line, l... Transmitter, L... Receiving, silent, B... Calling, SWI, 8W2, SW3 switch, 5...・
Individual calling signal transmitting/receiving device, 6 speakers, 10... chime sound generating section. Patent Applicant Toshiba Electric Materials Corporation Representative Patent Attorney Tatsu Ito Tetsuya Yuito Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A handset-and-receiver type intercommunication system in which a constant number of indoor units equipped with a handset and a microphone and a speaker are interconnected by indoor wiring including a sending side, a receiving line, and a calling line. 3, in a main unit/sub-main unit type in-coupon device that is capable of At the same time, when an address signal is sent from another indoor unit to the receiving unit, an internal calling signal transmitting/receiving device receives this signal and compares it with the address of the own unit; When an indoor calling operation is detected in any of the above, the speaker is disconnected from the receiving line and the calling party, and when the indoor calling signal transmitting/receiving device receives an own address signal, it connects the speaker to the calling line. An intercom device characterized by comprising a switching device. 2. The plurality of indoor units includes one base unit, and the switching device disconnects the indoor direct talk circuit provided in the base unit from the receiving line at the same time as disconnecting the speaker, and connects the address to the address. 2. The intercom device according to claim 1, wherein when the handset of the indoor unit designated by the signal is raised, the indoor telephone call line and the speaker are connected to the receiving line.