JPH0317268B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an intercom device used in hospital nurse call systems and the like.

Conventional configuration and problems thereof Generally, in an intercom device used in a hospital nurse call system, a large number of slave units must be connected to one base unit. Conventionally, when connecting a large number of slave units to one base unit, each slave unit and the base unit are electrically connected directly to each other with two or three wires. When a large number of slave units must be connected, such as in a hospital nurse call system, the number of wires between the slave units and the base unit increases significantly, making the wiring work extremely complicated and expensive. It was hot.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the conventional technology, and has a simple configuration that greatly facilitates the wiring between the base unit and the slave unit, and further reduces the call time from the slave unit to the base unit. The object of the present invention is to provide an excellent intercom device that can be significantly shortened.

Structure of the Invention The present invention connects a repeater between a base unit and a slave unit, and searches for a called slave unit based on the respective number information of the repeater and slave unit stored in advance in the base unit.
This is configured to be performed between the repeater and the base unit.

DESCRIPTION OF EMBODIMENTS FIG. 1 shows an embodiment of the intercom device of the present invention. In the figure, M is a base unit installed in a nurse station, etc., _S5 is a power switch attached to the base unit M, T ₁ to Tn are repeaters installed in each hospital room, etc., S ₁₁ to S _1o , S ₂₁ to S _2o , S _o1 to
S _on is a call switch for each slave unit connected to the base unit M via repeaters T ₁ to Tn, respectively.

And A, B, G are base unit M and repeater respectively.
These terminals are provided at _T1 to Tn, and terminal A is a data line connection terminal for transmitting and receiving data, B is a terminal for connecting a calling signal line, and G is a ground line terminal.

In addition, the repeaters T ₁ to Tn and the main unit M are the second
It is constructed as shown in FIGS. That is, FIG. 2 shows the configuration of repeater _T1 ,
In the figure, 1 and 2 are buffer circuits connected to terminals A and B for the data line and the call signal line, respectively;
3a to 3m are call switches for slave units S ₁₁ to 3m respectively.
A latch circuit 5 is connected to S _1o and holds the calling signal from the above-mentioned handset, and the input end of 5 is connected to the output end of each of the latch circuits 3a to 3m, and when a call is received from any of the above-mentioned handsets, this latch circuit is connected to One input terminal of the OR circuits 6a to 6m that transmits the signal to the calling signal line via the buffer circuit 2 is connected to the output terminal of the latch circuits 3a to 3m, and the other input terminal is connected to the slave device setting switch described later. AND circuit connected to the output terminal of _S4 , 8 is AND circuit 6a~
OR circuit with 6m output as input, 9 is a transmitting/receiving circuit that transmits and receives digital signals, _S3 is a repeater
A representative number setting switch 10 for setting the representative number of _T1 indicates that the representative number information received by the transmitting/receiving circuit 9 and the representative number information set by the representative number setting switch _S3 are mutually connected. a comparison circuit that outputs a predetermined match signal when a match occurs; 1;
1 is a circuit that decodes and latches the handset number information received by the transmitter/receiver circuit 9, and _S4 is a repeater.
_T1 is a handset setting switch that sets the number of the handset connected to T1; 12 is a latch circuit that latches the output of handset setting switch 11; 13 is an OR circuit that takes the output of handset setting switch 11 as input; 14 15 is a latch circuit operated by the output of the OR circuit 12;
is a switching circuit that switches between transmission and reception.

FIG. 3 shows the configuration of the main unit M, in which 17 and 18 are buffer circuits connected to the terminals A and B for the data line and the calling signal line, respectively, 19 is a data receiving means, and 20 21 is a signal processing means, 21 is a memory, 22 is an output means, 23 is a display circuit for displaying the call status of the handset, 24 is a rewritable memory, 25 is a microcomputer equipped with each of these means, and 26 is a power supply circuit. It is.

In the above embodiment, it is assumed that the call switch S ₁ a of the handset connected to the repeater T ₁ is turned on. When the call switch _S1a is turned on, the latch circuit 3a detects its state and outputs a high level signal to its output terminal. When a high level signal is output to the output terminal of the latch circuit 3a, this signal is transmitted to the call signal line B via the OR circuit 5 and the buffer circuit 2.
transmitted to. When the high level signal is output to the calling signal line B, it is received by the base unit M side. On the base unit M side, the data receiving means 19 receives the high level signal via the buffer circuit 18, and determines that a call has been received from one of the slave units. When the base unit M determines that there is a call from one of the slave units, the signal processing means 20 changes the number information of the repeater and the number information of the slave unit stored in the memory 24 to 1.
It is output to the data line A via the output circuit 22 and the buffer circuit 17 as an individual serial signal.
The number information outputted to the data line A is applied to the transmitting/receiving circuit 9 via the buffer circuit 1,
Here, serial to parallel conversion is performed. Among the serial-parallel converted number information, the repeater number information representing the repeater number is applied to the comparator circuit 10, where it is applied to the own repeater number set in advance by the repeater number setting switch _S3 . compared to When the two match, a predetermined match signal is output from the comparison circuit 10, and this is applied to the decoder circuit 11. When a coincidence signal is applied to the decoder circuit 11, the decoder circuit 11 decodes the number information of the handset received by the transmitting/receiving circuit 9 and converted into serial/parallel, and sends the decoded signal to each output terminal a. Output to ~m. That is,
Now, if the number information of the handset received by the transmitting/receiving circuit 9 and converted into serial/parallel is "1", the decoder circuit 11 outputs the first output terminal a.
Outputs a high level signal only to Therefore, if the a terminal of the slave setting switch _S4 is turned on in advance in this state, a high level signal is similarly output to the output terminal a of the slave setting switch _S4 .

In this way, when a high level signal is output to the output terminal a of the slave setting switch _S4 , this signal is applied to the latch circuit 14 via the OR circuit 13. When the high level signal is input to the latch circuit 14, the transmission/reception switching circuit 15 operates, and the signal appearing at its output terminal switches the transmission/reception circuit 9 to the transmission mode. Since the high level signal appearing at the output terminal a of the handset setting switch _S4 is simultaneously applied to the AND circuit 6a, a high level signal is also output to the output terminal of the AND circuit 6a. Therefore, the high level signal appearing at the output terminal of the AND circuit 6a is applied to the transmitter/receiver circuit 9 via the OR circuit 8, and thereby the transmitter/receiver circuit 9
transmits handset acquisition information to the base unit M side.

When the acquisition information is transmitted to the base unit M side via the data line A, the data receiving means 19 receives this information via the buffer circuit A on the base unit M side. Then, the signal processing means 20 operates based on the received capture information, reads out the repeater number information and slave unit number information that were previously transmitted to the repeater side from the memory 24, and based on this, the output means 22 is operated, and the display circuit 23 is operated. Therefore, on the base unit M side, the display corresponding to the above number information, that is, the display corresponding to the number of the slave unit whose call switch _S1a is turned on, lights up, indicating that a call has been received from the slave unit. Show that.

In this state, a high-level signal is still output from the latch circuit 3a on the repeater _T1 side, and this is transmitted to the base unit M side via the OR circuit 5, buffer circuit 2, and call signal line B. There is. Therefore, on the base unit M side, the number information of the next repeater and the next slave unit are stored in memory 2.
4, output means 22, buffer circuit 1
8. Transmitted to the repeater side via data line A.

Until the base unit M side transmits the number information of the next repeater and the next slave unit, the repeater _T1 side performs the following operation and switches the transmitting/receiving circuit 9 to the receiving mode. That is, when the transmitting/receiving switching circuit 15 is brought into operation by the output of the latch circuit 14 and the transmitting/receiving circuit 9 is switched to the transmitting mode by a signal from the output terminal, the transmitting/receiving switching circuit 15 then activates the built-in timer means. Depending on the function, a predetermined signal is output from the output end after a certain period of time has elapsed.
Therefore, this causes the latch circuit 14 to unlatch, and the transmission/reception switching circuit 15 to return to its original state. Therefore, at this point, a predetermined signal is output from the output end of the transmission/reception switching circuit 15, and the transmission/reception circuit 9 is switched to the reception mode.

In this way, when the base unit M transmits the number information of the next repeater and the next slave unit, the transmit/receive switching circuit 9 of the repeater is in the receiving mode.
The number information is received by the transmitter/receiver circuit 9 and serial-parallel converted as before. Then, the number information of the repeater is compared by the comparison circuit 10 with the repeater number set by the repeater number setting switch _S3 as before, and the number information of the slave unit is compared by the decoder circuit 11. is decoded and applied to slave unit setting switch _S4 . When the number information of the repeater matches the own repeater number set by the repeater number setting switch _S3 , and the contact point of the handset setting switch _S4 corresponding to the number information of the handset, for example b, is turned on. If so, a high level signal is output to the output terminal of the contact b of the handset setting switch _S4 as before. Therefore, the high level signal is input to the AND circuit 6b corresponding to the contact b. However, in this case, call switch S ₁ b is not turned on, and latch circuit 3 b
Since the output of is not at high level, AND circuit 6b
A higher level signal is not output, and the transmitter/receiver circuit 9 does not transmit handset acquisition information. That is, in this case, the handset non-acquisition information is transmitted to the base unit M side.
Therefore, based on this information, the base unit M side immediately reads the number information of the next repeater and the next slave unit from the memory 24 and transmits it to the repeater side.

In this way, while any of the call switches S ₁ a to S ₁ m is turned on and the latch circuits 3 a to 3 m are latching that state, the repeater numbers memorized one after another from the base unit M side are , the handset number information is transmitted, and the search continues for handsets that have the call switch turned on.

When a handset having a call switch turned on is detected, the display 23 is activated as described above to display that a call has been received from the handset.

When the above-mentioned handset that received a call is detected and the display corresponding to the above-mentioned handset is lit, the main unit M
When a response switch (not shown) provided on the side is operated, the signal processing circuit 20 operates based on this, and in addition to the repeater number and number of the slave unit stored in the memory 24, the response switch is A response signal from the operation is simultaneously transmitted to the repeater side. Therefore, the repeater receives this information and
Latch circuit 1 installed after slave setting switch S ₄
2 to the operating state. That is, when the response signal is received by the transmitting/receiving circuit 9, the selection signal S is outputted to its output terminal, and this is applied to the latch circuit 12, so that the output terminal of the latch circuit 12 corresponding to the slave device is A predetermined output appears. Therefore, this is applied to the latch circuits 3a to 3m that have been in the latched state until now, and the latch circuits 3a to 3m
releases the latch and goes into standby mode.

In this way, according to the above embodiment, a repeater capable of accommodating several slave units is provided between the base unit and the slave unit,
Information is exchanged between the repeater and the base unit, and the caller is searched and displayed based on the repeater number and handset number information stored in advance on the base unit. Therefore, it has the advantage that at least the wiring between the base unit and the repeater is significantly simplified. Further, according to the above embodiment, the memory 2 provided in the base unit in advance
4, the number information of each repeater and slave unit to be searched is sequentially stored and sequentially read out to search for repeaters and slave units. Even if a large number of repeater connection terminals and child device connection terminals are provided, if no repeaters, child devices, etc. are actually connected to these terminals, connect these repeaters, child devices, etc. in advance. This has the advantage that the search operation can be disabled, and the necessary series of search operations can be completed significantly faster as a whole.

In addition, as a method of pre-storing the number information of the repeaters and slave units to be searched in the memory 24 of the base unit M, a separate keyboard is provided, and from this keyboard, the number information of the repeaters and slave units can be sequentially and manually entered. There are various ways to input each input, but in this embodiment, when the power switch _S5 of the base unit M is turned on, the signal processing circuit 20 immediately operates based on this ON information and automatically connects to the base unit M. relay,
It is configured to detect slave units connected to the repeater and automatically store number information of these repeaters and slave units in the memory 24. That is, in this embodiment, when the power switch _S5 of the base unit M is turned on, the signal processing circuit 20 immediately operates, and all repeaters that can be connected to the base unit M and those that can be connected to these repeaters are activated. The number information of all slave units is sequentially transmitted to the repeater side starting from "1". If the repeater or slave unit is connected and the contacts a to m of the slave unit setting switch _S4 corresponding to the slave unit are turned on, a high level signal will be applied to the output terminals of the contacts a to m as described above. Since the signal is output, a handset capture signal and a handset non-capture signal are transmitted from the transmitting/receiving circuit 9 to the base unit M depending on the on/off state of the calling switches S ₁ a and S ₁ m, respectively. Therefore, these signals are used to operate the signal processing circuit 20 on the base unit side, and the number information of each of the repeater and slave unit that was previously transmitted to the repeater side is automatically stored in the memory 24. I have to. Therefore, according to the above embodiment, by simply wiring the base unit and the repeater, connecting the necessary slave units to each repeater, and turning on the contacts a to m corresponding to these slave units, the parent unit can be connected to the base unit. When the power switch of the device is turned on, the number information of each of the connected repeaters and child devices is automatically stored in the memory 24 of the parent device, which is extremely advantageous in practice.

Effects of the Invention As is clear from the above embodiments, the present invention connects a repeater between a base unit and a slave unit, and when a call is received from one of the slave units to this repeater, the call is transmitted to the base unit. , means for retrieving the repeater number and slave unit number stored in advance on the base unit side and transmitting them to the repeater; A means is provided to determine whether or not the repeater number corresponding to the calling handset matches the handset number, and to transmit the result to the above-mentioned base unit. Based on the received information, the display corresponding to the handset is lit, and the display indicates the handset that received the call, and there is no space between the base and handset. Since a repeater is connected and multiple slave units are connected via this repeater, the wiring between the base unit and slave units can be substantially simplified, and the This has the advantage that wiring work is extremely easy. Further, according to the present invention, the number information of the repeater and the slave unit is stored in advance in a memory provided in the base unit, and the information is sequentially retrieved to search for the repeater and the slave unit, respectively. Therefore, even if the master unit and repeater are equipped with many connection terminals for repeaters and slave units, if no repeaters and slave units are connected to these terminals, these repeaters, By not storing the number information of the handset in the memory, it is possible to prevent the above repeaters and handsets from being searched in advance. This has the advantage that the time can be significantly shortened and the response on the base unit side can be significantly faster.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of one embodiment of an intercom device of the present invention, and FIGS. 2 and 3 are more specific schematic configuration diagrams of the same essential parts. M...Main unit, _T1 ~ _To ...Repeater, _S1a ~ _S1n ,
S _2a ~ _{S 2n} , S _3a ~ S _3n ... Call switch, 1, 2,
17, 18...Buffer circuit, 3a, 3b, 1
2, 14... Latch circuit, 5, 8, 13... OR circuit, 6a to 6m... AND circuit, 9... Transmission/reception circuit, 10... Comparison circuit, 11... Decoder circuit, 15... Transmission/reception switching circuit , S ₃ ... Repeater number setting switch, S ₄ ... Handset setting switch, 19 ...
Receiving means, 20... Signal processing circuit, 21, 24...
...memory, 22...output means, 23...display circuit, 25...microcomputer, 26...power supply circuit.

Claims (1)

[Claims] 1. A repeater is connected between a base unit and a slave unit, and the base unit includes at least the respective numbers of the repeater connected to the base unit and the slave unit connected to the repeater. a storage means for storing, a means for sequentially searching the repeater number and the handset number stored in the storage means and transmitting the search results to the repeater, and blinking based on a display blinking instruction signal from the repeater. A display device is provided to display the call, and the repeater includes means for transmitting calls from the slave unit to the base unit, and the repeater number transmitted from the base unit.
The handset number is compared with the number of the repeater and handset that received the call, and if they match, a means is provided to transmit a blinking instruction signal to the base unit, and when a call is received from either handset, the calling The repeater informs the base unit that a , compares its own repeater number with the number of the called slave unit, and when the two match, transmits a flashing instruction signal from the repeater to the base unit to light up the display according to the result,
The display of the base unit is lit to display the called slave unit, and if the two do not match, the above repeater number and slave unit number are searched and transmitted next based on the results. In each of the repeaters, the intercom device is configured to compare its own repeater number and the number of the called handset in the same manner as above.