JP3354015B2 - Nurse call telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nurse call telephone device, and in particular, when a nurse call button is depressed during an outside call.
The present invention relates to a nurse call telephone device that automatically holds an outside line and can immediately perform a nurse call.

[0002]

2. Description of the Related Art A nurse call telephone apparatus shown in FIG. 2 has been conventionally proposed. In this nurse call telephone device, the nurse call slave unit SQ11 is composed of a telephone circuit 41 and a nurse call circuit 51, and a telephone line L11 is connected to the office line terminal T11 of the nurse call slave unit SQ11.

A receiving terminal T12 and a transmitting / receiving terminal T13
The confirmation terminal T14 is connected to the nurse call slave unit plate PL11, and the nurse call slave unit plate PL11 is connected to the nurse call master unit M via the corridor light circuit 56 and the control circuit 57.
Connected to Q11.

The telephone circuit 41 of the nurse call slave SQ11 has a holding circuit 4 to which a speech IC 42, a dialer IC 43, a numeric keypad 44, a handset 45, and a holding button K11 are connected.
6, a photocoupler 47 is provided.

The line terminal T11 is connected to a hook switch HS11, and the normally closed side of the hook switch HS11 is a ringer 48.
Is connected to

The normally open side of the hook switch HS11 is connected to the speech IC 42 to which the handset 45 is connected and the numeric keypad 44.
Is connected to the dialer IC 43.

The holding terminal 42a of the speech IC 42 is connected to a holding circuit 46, and a light emitting diode D11 of a photocoupler 47 is connected between the normally open side of the hook switch HS11 and the holding terminal 42a.

The light receiving transistor TR of the photocoupler 47
The collector of 11 is connected to one end of a blockage loop 55 provided in the nurse call circuit 51 via the normally open side of the hook switch HS12, and the emitter is a resistor other than the resistor R11 whose one end is connected to the reference potential point. Connected to the end.

The nurse call circuit 51 includes a loudspeaker 52, a loudspeaker microphone 53, a nurse call button K12, an amplifier 5
4. Transistors TR15 and TR16 and a blockage loop 55 are provided.

The other end of the loudspeaker 52, one end of which is connected to the reference potential point, is connected to the receiving terminal T12 together with the other contact of the nurse call button K12, one contact of which is connected to the reference potential point.

The base of the transistor TR15 is connected to the other end of the resistor R11, and the emitter is connected to the collector of the light receiving transistor TR11.

The collector of the transistor TR15 is connected to a resistor R12.
And to the base of the transistor TR16 via a resistor R13.

The base of the transistor TR16 is connected via a resistor R14, the emitter is connected via a resistor R15 to one end of a blockage loop 55, and the other end of the blockage loop 55 is connected to a transmitting and receiving terminal T13.
Is connected to

One end of the blockage loop 55 is connected to the power supply side of the amplifier 54, and the collector of the transistor TR16 is connected to the amplifier 5
4 and is connected to a transmitting / receiving terminal T13.

The collector of the transistor TR16 includes a loudspeaker microphone 53, an anode of a light emitting diode D16 for call display,
It is connected to a reference potential point via a cathode.

The cathode of the light-emitting diode D17 for calling confirmation whose anode is connected to the confirmation terminal T14 is connected to the reference potential point.

In such a nurse call telephone device, when the nurse call slave unit SQ11 is talking with an outside line, the normally open side of the hook switch HS12 is closed. Applied to the emitter of TR15.

When a voltage is applied to the emitter of the transistor TR15, the transistor TR15 is turned on.
Of the transistor TR16
Cannot operate, and the loudspeaker microphone 53 is inactive.

This function is an outside line confidential function in which the voice of an outside line call is not transmitted to the nurse call base unit MQ11 via the loudspeaker microphone 53 when called from the nurse call base unit MQ11.

During an outside line call (hook switches HS11, HS
When the nurse call main unit MQ11 is called when the normally open side is closed), the handset 45 is turned on and the hook switch H is turned on.
The normally open side of S12 is opened or the hold button K11 is pressed.

When the hold button K11 is depressed, the hold mode is entered, and under the control of the hold circuit 46, the transmitter / receiver 45 and the speech IC 42 are disconnected, and the light emitting diode D11 of the photocoupler 47 emits light.

When the light emitting diode D11 emits light, the light receiving transistor TR11 of the photocoupler 47 is turned on, the emitter and the base of the transistor TR15 have the same potential, the transistor TR15 is turned off, and the hook switch HS11 is turned off.
Is in the same state as when the normally open side is opened, the loudspeaker microphone 53 becomes active, and a nurse call is made. If the nurse call base unit MQ11 is to be called during a telephone call during outside line communication, the hold button K11 is pressed, and the hold circuit 46
A hold signal is sent to the hold terminal 42a of C42.

When the hold signal is input to the hold terminal 42a, the speech IC 42 disconnects the handset 45 from the speech IC 42. As a result, the telephone circuit 42 enters the hold mode.

In the nurse call circuit 51, when the nurse call button K12 is pressed, the receiving terminal T12 changes from the H level to the L level, and the nurse call slave unit plate PL11 detects a call.

When the nurse call slave plate PL11 detects a call, the confirmation terminal T14 is changed from L level to H level.

When the confirmation terminal T14 changes from the L level to the H level, the call confirmation light emitting diode D17 is turned on.

Thereafter, when a response is made by the nurse call master unit MQ11, the voice signal from the nurse call master unit MQ11 is transmitted to the loudspeaker 52 via the receiving terminal T12.

At the same time, nurse call slave unit plate PL11
A voltage is applied to the transmitting / receiving terminal T13 from the
One end of 5 is in a power receiving state.

When one end of the blockage loop 55 enters a power receiving state,
A voltage is applied to the loudspeaker microphone 53 and the call display light emitting diode D16 via the transistor TR16, and the call display light emitting diode D16 is turned on.

When a voltage is applied to the loudspeaker microphone 53, an audio signal to the nurse call master unit MQ11 is sent to the nurse call master unit MQ11 via the amplifier 54 and the transmission / reception terminal T13.

[0031]

In such a nurse call telephone device, a nurse call base unit MQ11 is used during an outside call.
If you want to make a nurse call, call
5 on-hook and press the nurse call button K12 or
There is a drawback in that either operation of pressing the hold button K11 and then pressing the nurse call button K12 is required, and both operations must be performed twice.

[0032]

SUMMARY OF THE INVENTION It is an object of the present invention to solve such a problem. When a nurse call button is depressed during an outside line call, the outside line is automatically held and a nurse call can be made immediately. It is an object to provide a call telephone device.

[0033]

In order to achieve this object, a nurse call telephone device according to the present invention comprises a nurse call slave unit connected to a telephone line and provided with a nurse call button, a loudspeaker and a loudspeaker microphone. and a nurse call parent device speaker and loudspeaker microphone can nurse call handset and nurse call call, the nurse call handset, coercive
A hold circuit for holding the telephone line by operating the stay button and a drive circuit for operating the hold circuit by operating the nurse call button are provided.

[0034] In addition, the nurse call the handset, Nasuko
Operation of the hold circuit by the drive circuit by operating the
After activating the call, the call with the nurse call base unit ends.
Until the drive circuit is not operated, a restoration prevention circuit is provided to prevent restoration of the holding circuit due to re-operation of the nurse call button.

[0035]

In this nurse call telephone device, when the nurse call button is operated, the drive circuit operates the hold circuit.

When the hold circuit is driven by the drive circuit, the power supply for talking to the loudspeaker microphone is supplied from the power supply circuit.

When the power for communication to the loudspeaker microphone is supplied from the power supply circuit, the loudspeaker and the loudspeaker microphone allow the nurse call slave unit and the nurse call master unit to perform a nurse call.

When the nurse call button is operated again while the hold circuit is being driven by the drive circuit, the recovery prevention circuit operates to prevent the recovery of the hold circuit.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a nurse call telephone apparatus according to the present invention will be described in detail with reference to FIG.

As shown in FIG. 1, a nurse call telephone device according to the present invention comprises a nurse call slave unit SQ1 to which a telephone line L1 is connected, a nurse call button K2, a loudspeaker 12 and a loudspeaker microphone 13, and a loudspeaker. A nurse call base unit MQ1 capable of making a nurse call with a nurse call slave unit 12 and a loudspeaker microphone 13. The nurse call slave unit SQ1 has a hold circuit 6 for holding the telephone line L1 and an operation of a nurse call button K2. And drive circuits FC2 and FC3 for operating the hold circuit 6.

When the holding circuit 6 is driven by the driving circuits FC2 and FC3, the restoration preventing circuit FC4 for preventing the holding circuit 6 from restoring due to the re-operation of the nurse call button K2.
It has.

The loudspeaker microphone 13 is constituted by an electret condenser microphone, and is activated when supplied with power.

The nurse call slave unit SQ1 comprises a telephone circuit 1 and a nurse call circuit 11, and the nurse call slave unit SQ
The telephone line L1 is connected to one station line terminal T1.

The receiving terminal T2, the transmitting / receiving terminal T3 and the confirmation terminal T4 are connected to the nurse call slave unit plate PL1,
Nurse call cordless handset plate PL1 is a corridor lighting circuit 1
6. It is connected to the nurse call master unit MQ1 via the control circuit 17.

The telephone circuit 1 of the nurse call slave unit SQ1 includes a speech IC 2, a dialer IC 3, a numeric keypad 4,
A transmitter / receiver 5, a hold circuit 6 to which a hold button K1 is connected, and a photocoupler FC1 are provided.

The line terminal T1 is connected to the hook switch HS1, and the normally closed side of the hook switch HS1 is connected to the ringer 8.

The normally open side of the hook switch HS 1 is connected to the speech IC 2 to which the handset 5 is connected and the dialer IC 3 to which the numeric keypad 4 is connected.

The holding terminal 2a of the speech IC 2 is connected to the holding circuit 6, and the light emitting diode D1 of the photocoupler FC1 is connected between the normally open side of the hook switch HS1 and the holding terminal 2a.

The collector of the light receiving transistor TR1 is connected to the nurse call circuit 1 via the normally open side of the hook switch HS2.
The emitter is connected to one end of the blockage loop 15, and the emitter is connected to the other end of the resistor R1 whose one end is connected to the reference potential point.

The hook switch HS2 is connected to the emitter of the transistor TR5 via the resistor R5, the collector of the transistor TR5 is connected to the other end of the resistor R2 having one end connected to the reference potential point, and the other end of the resistor R2 is connected to the resistor R3. It is connected to the base of the power supply transistor TR6 via the power supply.

The speaker 12 of the nurse call circuit 11
Is connected to the reference potential point, and the other end is connected to the receiving terminal T2.

The receiving terminal T2 is connected to the anode of the light emitting diode D2 of the photocoupler FC2 via the nurse call button K2, and the cathode is connected to the anode of the light emitting diode D3 of the photocoupler FC3.

The cathode of the light emitting diode D3 is connected to the reference potential point, and the light receiving transistors TR2 and TR3 of the photocouplers FC2 and FC3 are connected to the holding circuit 6 to which the holding button K1 is connected.

The receiving terminal T2 is connected to a light receiving transistor TR4 provided on the photocoupler FC4 via a nurse call button K2.
And the emitter is connected to the reference potential point.

The cathode of the light emitting diode D4 provided in the photocoupler FC4 is connected to the reference potential point, and the anode of the light emitting diode D4 is connected to the confirmation terminal T4 via the calling confirmation light emitting diode D7.
Is connected to

The transmitting and receiving terminal T 3 is connected to the other end of the blockage loop 15, and one end is connected to the power supply side of the amplifier 14.

The base of the power supply transistor TR6 is connected to the resistor R4, the emitter is connected to one end of the blocking line 15 via the resistor R5, and the collector is connected to the microphone 13 and the call display light emitting diode D6. In addition, it is connected to the anode of the light emitting diode D4 provided in the photocoupler FC4 and to the input side of the amplifier 14.

In the thus configured nurse call telephone device, when the nurse call button K2 is depressed during an outside line call, the receiving terminal T2 changes from H level to L level.

When the receiving terminal T2 changes from the H level to the L level, the nurse call slave unit plate PL1 detects this change, and knows that there is a call from the nurse call slave unit SQ1.

At the same time, the light emitting diodes D2 and D3 of the photocouplers FC2 and FC3 emit light, and the light receiving transistor TR2
And TR3 are turned on, and the outside line is held under the control of the holding circuit 6.

As a result, the light emitting diode D1 of the photocoupler FC1 emits light, and the light receiving transistor TR1 is turned on.

When the light receiving transistor TR1 is turned on,
The transistor TR5 turns off, and the hook switch HS2
Is off-hook, the power supply transistor TR6 is turned on and the loudspeaker microphone 13 is activated, so that a call can be made with the loudspeaker microphone 13 in response to the response of the nurse call master unit MQ1.

At this time, if the nurse call button K2 is pressed before the nurse call base unit MQ1 answers, the hold is released by the control of the hold circuit 6, and the loudspeaker microphone 1 is released.
3 becomes inactive.

However, even if the nurse call button K2 is pressed again, a photocoupler FC4 is provided to prevent such a state.

That is, once the nurse call button K2 is depressed, the call is provided from the confirmation terminal T4 to the call confirming light emitting diode D7 and the photocoupler FC4 until the conversation with the nurse call master unit MQ1 is completed. A current flows through the light emitting diode D4, and the light emitting diode D4 emits light.

When the light emitting diode D4 emits light, the light receiving transistor TR4 is turned on.

When the light receiving transistor TR4 is turned on,
The light emitting diodes D2 and D3 provided in the photocouplers FC2 and FC3 cannot emit light.
C3 does not operate.

The function of the photocoupler FC4 prevents the outside call hold from being released by pressing the nurse call button K2 twice.

If the nurse call base station MQ1 responds, a path is formed from the transmitting and receiving terminal T3 to the loudspeaker microphone 13, the call display light emitting diode D6, and the light emitting diode D4 of the photocoupler FC4. The diode D6 emits light.

[0070]

As is clear from the above description, according to the nurse call telephone apparatus of the present invention, a telephone call is connected, a nurse call slave unit provided with a nurse call button, a loudspeaker and a loudspeaker microphone, and a loudspeaker. It has a nurse call base unit that can make a nurse call with a nurse call slave unit using a speaker and a loudspeaker microphone. The nurse call slave unit operates a hold circuit that holds the telephone line and a hold circuit by operating a nurse call button. When a nurse call button is depressed during an outside line call, the outside line is automatically held and a nurse call call can be immediately made.

Further, since the recovery circuit is provided for preventing the recovery of the hold circuit due to the re-operation of the nurse call button when the hold circuit is driven by the drive circuit, the nurse call button is pressed during the nurse call. The hold circuit does not recover even if it is operated again.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a nurse call telephone device of the present invention.

FIG. 2 is a block diagram of a conventional nurse call telephone device.

[Explanation of symbols]

 SQ1 Nurse call slave unit MQ1 Nurse call master unit 6 Hold circuit 12 Loudspeaker 13 Loudspeaker microphone FC2 , FC3 ... Photocoupler (drive circuit) FC4 ... Photocoupler (restoration prevention circuit) K1 ... Hold button K2 ... Nurse call button L1 ... ····telephone line

Claims (2)

(57) [Claims] 1. A nurse call slave unit (SQ1) connected to a telephone line (L1) and provided with a nurse call button (K2), a loudspeaker (12) and a loudspeaker microphone (13), the loudspeaker and the loudspeaker Nurse call base unit (M
Q1), the nurse call slave unit has a holding circuit (6) for holding the telephone line by operating a hold button (K1), and a holding circuit for operating the nurse call button. Drive circuit (F
C2, FC3). 2. The nurse call handset includes the nurse call
Operation of the hold circuit by the drive circuit by operating the
After activating the loudspeaker microphone (13),
Until the call with the master unit ends,
Recovery blocking circuit not to operate to prevent the recovery of the hold circuit due to re-operation of the nurse call button (FC
The nurse call telephone device according to claim 1, further comprising (4).