JPH03205948A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To eliminate the discrepancy of an actual operation and a notice state by constituting the system so that an informing means of a master station or a slave station is not operated even if a speech operations is executed in the slave station or the master station, while the master station or the slave station is executing a speech to a line wire. CONSTITUTION:For instance, in the case a master station answers an incoming call of a line wire, a relay RY-6 is excited by an operation of a circuit connection detecting circuit 21, a relay contact RYS-61 is opened and cuts off a circuit to a slave station, and it is prevented that a speech of the master station and the line wire is heard by the slave station. Also, a relay contact RYS-64 is opened and obstructs turn-on of a light emission display element P1, and a display state is controlled so as to conform with this privacy telephone state. In such a way, while the master station is executing a speech to the line wire, even if a speech operation is executed in the slave station, an informing means of the master station does not operate, and also, while the slave station is executing a speech to the line wire, even if a speech operation is executed, an informing means of the slave station does not operate, and a notice conforming with a privacy telephone state can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention comprises a master station connected to a telephone line and equipped with a transmitter/receiver, and a slave station connected wirelessly. When the slave station is connected to an outside line and the master station is talking to an outside line, the slave station blocks calls between the slave station and the outside line, and when the slave station is talking to an outside line, prevents calls between the master station and the outside line. The present invention relates to a cordless telephone device having a confidential communication function.

(b) Conventional technology In the past, cordless telephone devices have been developed that allow calls from a slave station to an outside line via a master station, and this slave station can make calls even from a location several tens of meters away from the master station. Although this is very convenient, since the communication is carried out from a distance, the usage status of the master station or slave station cannot be known to the slave station or the master station.

For example, as disclosed in Japanese Patent Application Laid-Open No. 54-146508, a signal indicating the call status is transmitted from the master station and the slave station, and by using that signal, the master station or the slave station is in the call status. We are trying to make it known that this is the case.

By the way, in such WIt precepts, for example, when the master station is talking to an outside line and the slave station performs a call operation, the slave station transmits a signal indicating the call status, and the master station receives this signal to notify the slave station. This will notify you that you are on a call.

(c) The problem to be solved by the invention is, for example, Japanese Patent Laid-Open No. 54-62
As disclosed in Publication No. 716, when the master station is talking to an outside line, it blocks the communication between the slave station and the outside line, and when the slave station is talking to the outside line, it blocks the conversation between the master station and the outside line. If set up, for example, when the master station is talking to an outside line, even though calls between the slave station and the outside line are blocked, the master station will be notified that the slave station is in a talking state when the slave station performs a call operation. This resulted in a contradiction between the actual operation and the notification status.

(2) Means for Solving the Problems The cordless telephone device of the present invention is connected to a telephone line,
A master station equipped with a transmitter/receiver and a slave station connected by wireless are connected, and the slave station is connected to an outside line via the master station, and when the master station is talking to the outside line, the slave station and a confidential communication function that prevents calls between the master station and the outside line while the slave station is talking with the outside line, and transmits a signal to the master station and the slave station to instruct them to make a call. a transmitting means capable of transmitting data; and a notification means for always notifying the master station that the slave station is in a call by receiving a signal instructing the slave station to make a call; The notifying means is controlled so as not to operate even if a signal instructing a call from a slave station is received, and the transmitting means does not operate even if a call operation is performed at the master station while the slave station is talking to an outside line. a control means for constantly driving the transmitting means in response to a call operation; and a control means for constantly driving the transmitting means in response to a call operation; and a control means for notifying the slave station that the master station is in a call based on reception of a signal instructing a call from the master station. This system is equipped with a means for notifying the user.

(e) Operation Since the present invention is constructed as described above, while the master station is talking to an outside line, even if a call operation is performed at the slave station, the notification means of the master station will not operate, and the slave station will not operate. When the station is talking to an outside line,
Even if a call operation is performed at the master station, the notification means of the slave station will not operate.

(f) Example Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a diagram showing the structure of the master station, (1) is the terminal (L1)
A transmitter/receiver connected to an outside line at (L2) and an existing telephone (2) at terminals (L3) and (L4).
) is directly connected to the outside line terminal (L2), and the other terminal (L4) is connected to the outside line terminal (
L1). (3) is a hybrid transformer circuit that outputs the transmission signal to the slave station and the reception signal from the slave station, and as shown in Figure 3, the transformer (TI) (T2
), the coils (11) and (14) are connected in series, and the relay contacts (RYS-4) (RYS-21) (
RYS-61) is connected to external lines (Ll) (L2), and the transmitting signal is taken out from the coil (t6), and the receiving signal is input to the coil (l3). (
4) is a low frequency amplification circuit that amplifies the transmission signal output from the hybrid transformer circuit (3), and the amplified output is guided to the transmission circuit (5) and transmitted from the antenna (6). (7) is a normal heterodyne receiving circuit that receives radio waves transmitted from slave stations, and the frequency conversion circuit (8
), an intermediate frequency amplifier circuit (9), a detection circuit (10) and a low frequency amplifier circuit (11), and the output of the low frequency amplifier circuit (11) is guided to the hybrid transformer circuit (3). There is. In this case, the transmitting radio waves and the receiving radio waves use different frequencies, allowing simultaneous calls.

(12) is a tone signal fl generation circuit with a frequency f1 that operates when calling a slave station, and the tone signal f1 is generated by a mixer (13
), the signal is guided to the transmitting circuit (5), the carrier wave is modulated, and the signal is transmitted from the antenna (6). This tone signal f1 generating circuit (12) is activated when the call switch (14) is operated and when the first
An OR gate (OR1) is configured to generate a tone signal (f1) when the bell signal detection circuit (15) detects an incoming call from an outside line or when the master station transfers a received call to the slave station.
and a control signal is supplied via a relay contact (RYS-22). (16), (17), and (18) are tone signal detection circuits that detect the tone signals (f2), (f3, and f4) transmitted from the slave stations, and the outputs of the detection circuits (10) are guided to detect the tone signals. It is designed to be detected. In addition, each tone signal (fz) (f3) (f4) is
(f2) indicates that the slave station is in the transmitting state, and (f3)
indicates that the slave station is operating the intercom, and (
f4) indicates that the slave station is performing a transfer operation to the master station, and the master station is configured to be controlled by detecting this tone signal. (RY-1) is the first relay that is excited by the conduction of the transistor (Q1) whose base is input to the output of the OR gate (ORI) and the tone signal (f2) through the OR gate (OR2). Relay contact (
By closing RYS-1), power is supplied to the low frequency amplifier circuit (4) and the transmitting circuit (5), and the master station is set to the transmitting state. (RY-2) is a second relay that is energized by conduction of transistor (Q2) upon detection of tone signal (f2). By closing the normally open relay contact (RYS-21), the line to the slave station is connected. By connecting and opening the normally closed relay contact (RYS-22), the tone signal (f1) is not generated when the slave station is in the transmitting state. (RY-3) is a transistor ( Q3
) The third relay is energized by conduction, and acts to interrupt the circuit of the master station telephone (2) by opening the normally closed relay contacts (RYS-31, RYS-32). (P1) is a light emitting display element that is turned on when the transistor (Q3) is conductive, and indicates that the slave station is talking to an outside line. Also, this third relay (RY-3) has a relay contact (
The relay contact (RYS-64) is connected to the power supply via the relay contact (RYS-64) so that it is not excited when it is OFF. (RY-4') is the output of the AND gate (A2) into which the tone signal (f3) and the "H" level signal are input via the relay contact (RYS-65), and the slave station line control circuit (25) which will be described later. ) The fourth relay is excited by the conduction of the transistor (Q4) by the output of (OR3), and connects the shorting type relay contact (RYS-4) from the normally closed contact on the A side. By switching to the regular contact point on the B side, the outside line during intercom talk between the master station and the slave station is connected to the second bell signal detection circuit (19). (P2) is a transistor (Q4)
A light-emitting display element that lights up when the intercom is connected indicates that an intercom call is in progress.

(20) is the call switch signal (S1), the output signal (S2) of the line connection detection circuit (21), and the slave station line control circuit (
25) output signal (S3), transfer switch signal (S4)
and a hold control circuit that receives the tone signal (f4) as input,
When transferring from the master station to the slave station or from the slave station to the master station, the transistor (Q
5), the fifth relay (RY-5) is energized, the relay contact (RYS-5) is closed, and the external line is held in a reserved state, and the tone signal f is transmitted via the diode (D1).
By operating the 1 generation circuit (12), a tone signal (
f]). (P3) is a light emitting display element that is turned on when the transistor (Q5) is turned on to indicate the pending state. The hold control circuit (20) is configured as shown in FIG.
) is input to the set terminal (S) of the flip-flop (FF-1) via the OR gate (OR5), and the transfer switch signal (S4) and the output signal of the line connection detection circuit (21) The output of the AND gate (A4) into which (S2) is input is connected to the first input, the reset output (page) of the flip-flop (FF-1) is connected to the second input, and the third input A flip-flop (FF-) is set by the output of the AND gate (A3) and reset by the signal (S3) from the slave station line control circuit (25).
AND gate (2) into which the reset output (σ) is input (
The output of A5) is input to the set terminal (S) of the flip-flop (FF-1) via the OR gate (OR5). Furthermore, the output of the AND gate (A4) and the set output (Q) of the flip-flop (FF-1) are input to the reset terminal (R) of the flip-flop (FF-1). The set output (Q) of the flip-flop (FF-1) is supplied to the base of the transistor (Q5).

(21) is a line connection detection circuit that detects when the handset of the master station telephone (2) is picked up and the line is connected.
When the relay (RY-6) is energized, the normally closed relay contact (RY
S-61) is opened to cut off the line to the slave station, and the normally open relay contact (RYS-62) is closed to drive the line use signal generation circuit (22) to generate a tone signal, which is the line use signal. (f5). This line connection detection circuit (21) detects changes in line voltage between when the line is connected and when it is not connected, and as shown in Figure 5, it includes a full-wave rectifier circuit (23) and a voltage comparator ( 24), when the line voltage drops below the set voltage during line connection, an output is generated from the voltage comparator (24) and the transistor (Q6
) acts to conduct.

(25) is a call switch signal (S1), a tone signal (
f2), tone signal (f4) and transfer switch signal (S
4) in the slave station line control circuit that inputs the transistor (
By making Q7) conductive, the seventh relay (RY-7)
By energizing the relay and opening the normally closed relay contact (RYS-7), the sixth relay (RY-6) is rendered inoperable. The slave station line control circuit (25) includes three 7 flip-flops (FF-3) (FF-3) as shown in FIG.
F-4) (FF-5), flip-flop (
FF-3) is an AND gate (A7) output that is opened when the calling switch signal (S1) and tone signal (f2) match;
Or, when the tone signal (f2) is present, one-shot multi-by-break by operation of the transfer switch (26) - AND game opened by output generation of (27)}
(A8) to be set by the output of the AND gate (A8).
7) (A8) is connected to the set terminal (S) via the OR gate (OR6) and generates a pulse at the falling edge of the tone signal (f2) so that it is reset at the falling edge of the tone signal (f2). The output of the generator (28) is OR game}
It is connected to the reset terminal (R) via (OR7), and the set output (Q) is led to the base of the transistor (Q7).

Further, in the flip-flop (FF-4), the output of the AND gate (A7) is connected to the set terminal (S), and the output of the pulse generator (26) and the output of the one-shot multivibrator (27) are connected to the OR gate ( The set output (Q) is connected to the reset terminal (R) via the OR gate (OR8), and the set output (Q) is connected to one side of the OR gate (OR-3) via the OR gate (OR9). is guided by the input. and flip-flop (FF)
-5) are the ringing switch signal (S1) and tone signal (f
4) is set by the AND gate (A9) output which is opened on a match, and the one-shot multi-bye break-(27
), and the set output is sent to the OR gate via a delay circuit (29) and an AND gate (AIO), one input of which is the output of the one-shot multivibrator (27). } (OR7) and is designed to reset the flip-flop (FF-3). Further, the output of the pulse generator (28) is sent to the 7 flip-flops (FF-) of the hold control circuit (20).
2) is input to the reset terminal.

(30) is the output of the second bell signal detection circuit (19) and the output of the calling signal control circuit (31)
The calling signal generating circuit is inputted via R4) and is driven when a call is received from an outside line during an intercom call or when a slave station calls as an intercom, and generates a calling signal from the speaker (32).

The first and second bell signal detection circuits (15) (19)
As shown in the figure, a neon lamp (33) and C d s (
34) and a photocell (35) consisting of a transistor (Q
9), and when there is an incoming call on the outside line, the neon lamp (33) is lit by a bell signal, and C d s (3
The transistor (Q9) is made conductive due to the decrease in the resistance value of 4), thereby operating so that an output signal is taken out from the emitter.

Further, as shown in FIG. 8, the calling signal control circuit (31) outputs a calling switch signal (S1) and a tone signal (f3).
Pulse generation that is set by the output of the AND gate (All) with input as input, and generates a pulse at the falling edge of the tone signal (f3)! A flip-flop (FF-6) that is reset by the output of (36), and a flip-flop (FF-6) that is reset by the output of
FF-6) reset output (σ) and tone signal (f3
) is controlled by the AND gate (A12) which inputs the signal, and the operation of the calling signal generating circuit (30) which is driven by the generation of the tone signal (f3) is controlled by the calling switch (]4).
It works to stop by setting the flip-flop (FF-6) with the operation.

(RY-8) is the eighth relay that drives the line use signal generator (22), and is excited by the conduction of the transistor (Q8) by the output of the reset circuit (37), and the relay contact (
By closing RYS-8), power is supplied and a tone signal (f5) is generated. The reset circuit (37) is configured as shown in FIG. 9, and is set by the transfer switch signal (S4) to generate a pulse at the falling edge of the tone signal (f2). The flip-flop (FF-7) is reset by the output of (38), the inverter output of the tone signal (f2) and the output signal (S5) of the OR gate (OR3), and the reset of the flip-flop (FF-7) AN with output (σ) input
D game} (A13) and a timer circuit (39) that is activated by the output generation of the AND gate (A13) and generates a pulse output after a predetermined period of time, and a pulse at the falling edge of the AND gate (A13) output. A flip-flop (FF-8) that is set by the output of the pulse generator (40) and reset by the output of the pulse generator (38), the output of the timer circuit (39), and the flip-flop (FF-8)
) inputs the reset output (σ) of the AND gate (A
14), and the AND gate (A14) output is input to the base of the transistor (Q8). still,
The pulse generator (38) is provided with a low-pass filter at the front stage and does not respond to high-speed pulses such as dial pulses, and the pulse generator (40) is set to respond to dial pulses. In addition, a pulse generator (
38) generates a pulse after being delayed by a low-pass filter. (41) is a relay contact (RYS-3
2) is connected in series with the reset switch to optionally drive the line use signal generation circuit (22) and generate the tone signal (f5
).

FIG. 2 is a diagram showing the groove control of the slave station, where (42) is a receiving section that receives radio waves transmitted from the master station, and (43) is a transmitting section that transmits radio waves toward the master station. The receiving section (42) includes a frequency conversion circuit (44), an intermediate frequency amplification circuit (45), a detection circuit (46), a low frequency amplification circuit (47), a speaker (48), and a tone signal. f】
It is driven by the detection circuit (49) and the generation of the tone signal (f1), and the output is passed through the mixer (50) to the low frequency amplification circuit (
47), a tone signal f5 detection circuit (53), and a tone signal f5 detection circuit (53).
5) is input through an AND gate (A15), driven by the generation of a tone signal (f5), and the output is sent to a mixer (50
), a carrier wave detection circuit (55), a transistor (Q1.O) which is made conductive by the circuit output, and a light emitting display element (P4).

On the other hand, the transmitter (43) includes a low frequency amplification circuit (57) that amplifies the output of the microphone (56), and a tone signal (f2).
(f3) (f4) generation circuit (58) (59) (60)
, dial pulse generation circuit (61), output of the low frequency amplification circuit (57), tone signals (f2) (f3) (f
4) and dial pulse generation circuit (61) output,
It is composed of a transmitting circuit (62) that modulates and transmits a carrier wave, and a switch circuit (63), and each of the circuits is set to an appropriate operation mode by the switch circuit (competitor). Switch circuit (
63) consists of a return type response switch (64), an intercom switch (65) and a transfer switch (66),
Response switch (64) and intercom switch (65)
is a flop flop (FF-9) (FF-
10) should be set and reset alternately.
One input of the R gate (ORIO) (ORII) is
The output of a one-shot multivibrator (67) that operates when a tone signal (f5) is generated from the tone signal f5 detection circuit (53) of the receiver (lock) is input, and even when a tone signal (f5) is generated, the flip-flop ( FF-9)(
I am advised to reset the FF-10). The set output (Q) of the flip-flop (FF-9) supplies power to the low frequency amplification circuit (57), the transmission circuit (62) and the tone signal f2 generation circuit (58), and ) supplies power to the tone signal f3 generation circuit (59) and also connects the diode (D2).
Power is also supplied to the tone signal f2 generation circuit (58) and the like via the power supply. Also, flip-flop (FF-9) (FF
The output of -10) is supplied to the receiving section (婬) and OR game}
It is input to the AND gate (A15) via (ORI2). When the transfer switch (66) is operated, it supplies power to the tone signal f4 generation circuit (60), and also supplies power to the tone signal f3 generation circuit (59) via the diode (D3), thereby generating the tone signal f4. Signal (f3), (f
4). (P5) is a light-emitting display element that lights up when the response switch (64) and intercom switch (65) are operated, and indicates the transmitting state, and (P6) is an intercom switch (65) and transfer switch (66). ) is a light-emitting display element that lights up when operated.
Indicates that the intercom is in use.

(68) is a rechargeable battery, and the power switch (68) is a rechargeable battery.
Power is supplied to the receiving section (婬) and the transmitting section (bee) through the power switch (69), and when the power switch (69) is closed, power is supplied to the receiving section (ri) and the receiving section is in a reception standby state. is set to

Next, the operation of the present invention including such IIIljE will be explained.

Assuming that the power switches of both the master station and the slave stations are closed and the receivers are set to a reception standby state, the intercom operation for freely communicating between the master station and the slave stations will be explained first.

10th when calling a slave station from the master station when making a call.
This will be explained with figures. At this time, the master station first picks up the receiver of the telephone (2) (Tl in Figure 10) and calls the call switch (14).
) is closed (T2 in Figure 10). call switch (
14), the fourth relay (R
Y-4) is excited, switches the relay contact (RYS-4) from the A side to the B side contact, cuts off the connection between the outside line (Ll) (L2) and the telephone (2), and also opens the OR gate (ORI).
) (OR2) to make the transistor (Q1) conductive, and drive the tone signal f1 generating circuit (12) via the OR gate (ORI). Therefore, the first relay (RY-
1) is energized and the relay contact (RYS-1) is closed,
The transmitting circuit (5) is operated and the tone signal (f1) is transmitted from the antenna (6). Tone signal (f1) from the master station
is transmitted, the tone signal (f1) is received by the slave station in reception standby state, and the tone signal f1 detection circuit (49)
Upon detection of the tone signal (f1), the calling signal generating circuit (52) is driven, whereby a calling signal is generated from the speaker (48) and the slave station is called.

The person at the slave station who hears the calling signal from the speaker (48) closes the response switch (64) (Fig. 10T
3). Before this, the flip-flop (FF-9) was in the reset state, so closing the response switch (64) will cause the AND
By opening the gate (A16), the flip-flop (FF-9) is set and the low frequency amplifier circuit (57) is set.
, a transmitting circuit (62) and a tone signal f2 generating circuit (58)
) is supplied with power and a tone signal (f2) is transmitted. When the tone signal (f2) is transmitted, the master station receives it and detects the tone signal (f2) by the tone signal f2 detection circuit (16).
f2) is detected. By continuing to conduct the transistor (Q1) through the OR gate (OR2) upon detection of the tone signal (f2), the first relay (RY-1) is energized even after the call switch (14) is released. While maintaining the transmitting state, the second relay (RY-2) is energized by the conduction of the transistor (Q2), and the relay contact (RYS-21) is energized.
) by closing (RYS-22) and opening (RYS-22),
By forming the line between the telephone set (2) and the slave station and stopping the transmission of the tone signal (f1), the calling signal of the slave station is stopped. Therefore, the call switch (14)
To prevent the ringing signal of a slave station from continuing to ring if it continues to be operated. Furthermore, due to the generation of the tone signal (f2), the AND game 1- (A7) of the slave station line control circuit (25)
is opened and flip-flops (FF-3) (FF-4)
When set, the set output of the flip-flop (FF-4) is supplied to the transistor (Q4) via the OR gate (OR9) (OR3), thereby continuing to excite the fourth relay (RY-4). At the same time, when the set output of the flip-flop (FF-3) is supplied to the transistor (Q7), the transistor (Q7) becomes conductive and the seventh relay (R
Y-7) to open the relay contact (RYS-7).

When this relay contact (RYS-7) is opened, by first picking up the handset of the master station telephone (2), the sixth relay (which has been energized by the operation of the line connection detection circuit (21))
RY-6) becomes inoperable, and the relay contact (RYS-61) becomes inoperable.
) returns, the above-mentioned relay contact (RYS-
21), the master station and slave station are connected.

These operations mentioned above are performed instantaneously, and when the master station hears the response voice from the slave station, it presses the call switch (14).
Cancel the operation. Even after the call switch (14) is released, the line is maintained as described above, and the voice of the master station is guided from the coil (t6) of the hybrid transformer circuit (3) to the transmission circuit (5) and transmitted to the slave station. speakers (48
), the voice of the slave station is guided to the coil (l3) of the hybrid transformer circuit (3) of the master station, and is reproduced by the receiver, allowing the two parties to talk freely.

After this, when you want to end the call from the slave station, press the response switch (
64) again (Figure 10, D4). This results in
The AND gate (A17) is opened and the flip-flop (
FF-9) is reset and transmission of the tone signal (f2) is stopped. At the master station, due to the disappearance of the tone signal (f2), the first and second relays (RY-1) (RY-2) become inoperable, and the seven flip-flops (FF- 3) (FF-4) is the tone signal (f2
), the fourth and seventh relays (RY-
4) (RY-7) becomes inactive and returns to the initial reception standby state.

Further, after confirming the end of the call, when the master station wants to end the call, the reset switch (41) can be closed. In other words, during an intercom call, the third relay (RY-3)
The relay contact (RYS-32) is closed due to non-operation (
In addition, when the relay contacts (RYS-8) (RYS-62) remain open) and the reset switch (4l) is operated, the tone signal (f5) is generated by driving the line use signal generation circuit (22). Sent. When the tone signal (f5) is detected in the slave station, the one-shot multivibrator (67) is operated, thereby resetting the flip-flop (FF-9) and returning it to the initial state as described above. I can do it.

In this way, the master station can return the slave station to the reception standby state, so there is no need to forget the return operation on the slave station side.
The parent and child are kept in intercom mode, and the phone (2)
The relay contact (RYS-4) can prevent the situation where the line remains cut off from the outside line.

The above explanation was for a call from a master station to a slave station, but
Next, the operation of calling the master station from the slave station will be explained with reference to FIG.

A call from the slave station is made by closing the intercom switch (65) (T1 in FIG. 11). That is, when the intercom switch (65) is closed, the AND gate (A18) is opened, and the flip-flop (FF-1) is opened.
．． 0) is set, the tone signal f3 generation circuit (5
9) is driven, and the transmission circuit (62) and tone signal f2 generation circuit (58) are also driven via the diode (D2), whereby tone signals (f2) (f3) are transmitted from the slave station. Ru. Tone signal (f2) from slave station (
f3), the master station receives the tone signal f2 detection circuit (1
By detecting the tone signal (f2) according to 6), the OR game}
By energizing the first relay (RY-1) by making the transistor (Q1) conductive through (OR2), the transmitter circuit (5) is operated, and the relay contact is activated by energizing the second relay (RY-2). (RYS-21) and connect the line. Furthermore, when the tone signal (f3) is detected by the tone signal f3 detection circuit (17), the AND gate (A2) is opened, and the fourth relay (RY-4) is excited via the OR gate (OR3). Then, as mentioned above, the relay contact (RYS-4) is switched to the B side to disconnect the outside line, and the AND game of the calling signal control circuit (31)
2) is opened, the calling signal generation circuit (30
) is driven via the OR game (OR4) and generates a calling signal from the speaker (32).

When the person at the master station notices the paging signal, he or she first presses the paging switch (14) to stop the paging signal before answering.
When A is closed (FIG. 11, 72), the AND gate (All) of the calling signal control circuit (31) is opened, and the flip-flop (FF-6) is set.
The ND gate (A12) closes and the calling signal generation circuit (3
0) stops operating and the ringing signal stops ringing. Since the relay contact (RYS-22) is open at this time, no tone signal (fl) is generated, and therefore no calling signal is generated at the slave station. At the same time, the AND game (A7) of the slave station line control circuit (25) is opened, so that the flip 7 lop (FF-3) is set and the seventh relay (R
Y-7) is excited. By energizing the seventh relay (RY-7) and disabling the sixth relay (RY-6),
When you pick up the handset, the line with the slave station is connected and you can talk.

After this, when you want to end the call from the slave station, just operate the intercom switch (65) again (Fig. 11, 73).
. This opens the AND gate (A19), resets the flip-flop (FF-10), and stops transmitting the tone signals (f2) (f3). Tone signal (f
2) When the transmission of (f3) is stopped, the first and second
, 4th and 7th relays (RY-1) (RY-2) (RY-
4) (RY-7> becomes inoperable and returns to the initial state.

At this time, when the tone signal (f3) falls, the pulse generator (36) of the calling signal control circuit (31) generates a pulse, and the 7 flip-flop (FF-6) is also reset and returned to the initial state.

After confirming the end of the call, when the master station wants to end the call, close the reset switch (41) as described above to reset the slave station's 7 flip-flop (FF-10) and set it to intercom mode. All you have to do is release it.

In addition, as mentioned above, when there is an incoming call to an outside line while talking with a slave station as an intercom, the relay contact (RYS-4) is switched to the B side, so that the bell signal is sent to the second bell signal detection circuit. (19), the photocell (35) turns on the transistor (Q9), and the output becomes an OR gate.
A calling signal is generated from the speaker (32) by being led to the calling signal generating circuit (30) via (OR4). Therefore, the master station knows that there is an incoming call on the outside line. When the master station hears the paging signal, it informs the slave station, cancels the call between the master station and the slave station, and switches to an outside line. To switch to an outside line, the fourth relay (R
Y-4> is not working, relay contact (RYS-4) A@
By switching back to
2) and can make calls to outside lines.

Next, a case will be described in which a call is received on an outside line while both the master station and the slave station are in a reception standby state.

At this time, the relay contact (RYS-4) of the master station is switched to the A side, so that the telephone (2) rings with the bell signal, and the bell signal is transmitted to the first bell signal detection circuit (15).
), the OR gate (OR1) (O
At the same time, the first relay (RY-1) is excited to be in the transmitting state via the tone signal fl generating circuit (12).
A tone signal (f1) is generated by driving the tone signal (f
By transmitting 1), the slave station can also know that there is an incoming call by the generation of a paging signal as described above.

The operation in the case where the master station and the slave station simultaneously confirm the incoming call and the master station responds will be described with reference to FIG. 12. When the master station picks up the handset, it can make a call to an outside line in the same way as a normal telephone. At this time, by picking up the receiver (72 in Fig. 12), the line connection detection circuit (21)
When the sixth relay (RY-6) is energized by the operation of Relay contact (RYS-62) (RYS-6
3) is closed, transmitting a tone signal (f5) as a line use signal. Therefore, if the slave station attempts to make a call to an outside line or an intercom call to the master station and closes the response switch (64) or intercom switch (65), the flip-flop (F
F-9) (FF-10) sets OR gate (OR
12) to the AND gate (A15), the tone signal (f5) is detected and the AND gate (
A15) is opened, the line use signal generation circuit (54) is driven, and a line use signal is generated from the speaker (48), thereby informing the slave station that the parent station is currently talking to an outside line. be able to. Also, relay contact (RYS-6
4) is opened, the response switch (6) of the slave station is opened.
When the tone signal (f2) is transmitted by the operation in step 4), the AND gate (A1) of the master station is opened and the third relay (RY-3)
operates to prevent the main station and outside line from being disconnected due to the relay contact (RYS-31) opening, and also prevents the light emitting display element (P1) from being disconnected.
The illumination of ilJ is prevented and the display state is controlled to match this confidential message state. Furthermore, the relay contact (RY
S-65) is opened, the tone signal (f3) is transmitted by operating the slave station's intercom switch (65), the AND gate (A2) of the master station is opened, and the fourth relay (RY-65) is opened.
4) is activated and the relay contact (RYS-4) is switched to the B side, thereby preventing the master station and the outside line from being disconnected. In this way, when the master station is talking to an outside line, this is indicated to the slave stations, and no matter what operation the slave station performs, it does not affect the conversation of the master station. Furthermore, when the slave station operates the intercom, the call signal generation circuit (30) is driven as described above upon detection of the tone signal (f3), so that the master station can detect that the slave station wishes to make an intercom call. I understand. After the call is over, the initial state is restored by returning the handset (T3 in FIG. 12).

In this way, it may be more convenient for an outside call received at the parent station to be received by a person at the slave station.

In that case, notify the other party and transfer switch (26)
) can be transferred to the slave station by performing a closed operation (first
(See Figure 3). That is, when the transfer switch (26) is closed (T3 in FIG. 13), the AND gates (A4) (A5) of the hold control circuit (20) are opened, so that the set of flip-flops (FF-1) 5th relay (RY-5)
is excited, and when the relay contact (RYS-5) is closed, the external line (
By short-circuiting Ll) (L2) by a predetermined impedance element (Z), the outside line is set to a hold state.

At this time, the set output of the flip-flop (FF-1) is sent to the tone signal f1 generation circuit (12) and the OR gate (OR9) via the diode (DI) OR gate (ORI).
(OR3), the tone signal (f1
) is transmitted and the fourth relay (RY-5) is energized and the relay contact (RYS-4) is switched to the B side contact. Upon reception of the tone signal (f1), the calling signal generation circuit (52) is driven in the slave station, and the calling signal is transmitted to the speaker (4).
8) Yo9 occurs. When the person at the slave station who notices the paging signal operates the response switch (64) (T4 in Figure 13), the slave station line control circuit (2) of the master station transmits a tone signal (f2).
5) AND gate (A7) is opened and the flip-flops (FF-3) (FF-4) are set and the seventh relay (RY
-7) is energized and the 6th relay (RY-6) is made inoperative, so that the 6th relay contacts (RYS-61) - (RYS-65) are all in their initial state. , and the intercom line with the slave station is connected (at this time, the tone signal (f2) causes the second relay (RY
-2) is energized, the relay contact (RYS-21) is closed, and the relay contact (RYS-22) is opened to stop generating the tone signal (f1) from the tone signal f1 generation circuit (12). ). At this time, the slave station line control circuit (25
), the AND game} (AI) is not opened and the third
The relay (RY-3) is inactive, and the line to the master station is never interrupted. When the slave station responds in this way, it announces that it wants to transfer and closes the transfer switch (26) again (T5 in Figure 13), and the hold control circuit (20) activates the AND gates (A4) (A6). By being opened,
When the flip-flop (FF-1) is reset and the 5th J relay (RY-5) becomes inoperable, the relay contact (RYS
-5) is opened and the hold state is released, and the flip-flop (FF-4) of the slave station line control circuit (25) is reset, causing the fourth relay (RY-4) to become inoperable and the relay When the contact (RYS-4) returns to the A side, the line between the outside line (Ll) (L2) and the slave station is connected.

Also, when the fourth relay (RY-4) is inoperable and the AND game (AI) is opened, the third relay (RY-4) is opened.
3) is excited, the relay contact (RYS-31) is opened, and the line of the master station is cut off. At this time, the reset circuit (37)
is a 7 flip-flop (F) by operating the transfer switch (26).
By setting F-7), the reset circuit (37) is not activated in response to the slave station. After the call between the slave station and the outside line ends, both the master station and the slave station are returned to the reception standby state by closing the response switch (64) of the slave station and stopping the transmission of the tone signal (f2). Ru.

In addition, if the slave station does not respond when transferring to the slave station, by operating the transfer switch (26) again, the flip-flop (FF-1) is reset and the fourth relay (RY-4
) and the fifth relay (RY-5) become inoperative, the hold state is released and the master station and the outside line are reconnected. or,
At this time, the generation of the tone signal (f1) from the tone signal f1 generating circuit (12) also stops.

Next, if the slave station responds to an incoming outside line call, the 14th
This will be explained with figures. When the response switch (64) is closed or operated (FIG. 14, 72), the tone signal (f2) is transmitted by the set of flip-flops (FF-9).
The master station is set to transmit state, and the second relay (RY
-2) excitation closes the relay contact (RYS-21) and connects the line between the outside +Iil (Ll) (L2) and the slave station, making it possible to talk to the outside line. At this time, the AND gate (A1) is opened.
Relay contact (RYS-31) is activated by excitation of J-ray (RY-3).
) (RYS-32) is opened, the line of the master station is cut off so that the master station cannot hear the line, and when the reset switch (41) is operated while the slave station is talking, the slave station Prevent the station from being reset. Also, due to the relay contact (RYS-31) being open, even if the handset of the telephone (2) is picked up, the sixth relay (RY-6) will not operate and the relay contact (RYS-62) will remain open. , the tone signal (f5) is not transmitted to the slave station. Therefore,
Not only is the slave station reset, but the line use signal generating circuit (54) is also prevented from operating, and notification control is performed to match this confidential state.

Additionally, since the tone signal (f5) is not transmitted during a call to the slave station, the call quality of the slave station can be improved (the tone signal (f5) is removed at the slave station and the speaker (48)
However, due to the circuit characteristics, the tone signal (f5
) may be leaked). Furthermore, the third relay (RY-3
) is excited and the light emitting display element (P1) is turned on, thereby informing the master station that the slave station is talking to an outside line. After the call is over, by operating the response switch (64) of the slave station again (T3 in FIG. 14), both the master station and the slave station are returned to the reception standby state.

Next, if you want to transfer the call received at the slave station to the master station (see Figure 15), close or operate the transfer switch (66) after telling the other party to that effect (T3 in Figure 15). Tone signal (
This is possible by sending f3) (f4). That is, in the master station, the tone signal (f) is detected by the tone signal f3 detection circuit (17).
Upon detection of step 3), the calling signal control circuit (31) is driven to generate a calling signal from the speaker (32), and the third relay (RY-3) is inactivated by closing the AND gate (A1). Contact (RYS-31)
Connect the line of the master station by closing the . After receiving the call in this way, the master station operates the call switch (14) to stop the call signal (74 in FIG. 15), and then picks up the handset to talk to the slave station. At this time, the AND gate (A3) of the hold control circuit (20) is opened by operating the call switch (14), and the flip-flop (F
When F-1) is set, the fifth relay (RY-5) is energized to set the outside line (L1) (L2) to the hold state as described above, and also to set the slave station line control circuit (52) to the hold state. AND
The gates (A7) (A9) are opened and the flip-flop (F
When F-3) (FF-4) (FF-5) is set,
The fourth and seventh relays (RY-4) (RY-7) are energized. Therefore, even if the relay contact (RYS-4) is switched to the B side and the handset is picked up, the relay contact (RYS-4) is switched to the B side.
) remains inactive, and when the handset is picked up, parent-child communication becomes possible. In this state, the relay contact (RYS-62) remains open due to the inoperation of the relay (RY-6), and the tone signal (f5) is not generated by the line use signal generation circuit (22).

The master station, which has been informed of the transfer through a call with the slave station, closes or operates the transfer switch (26) (T5 in Figure 15).
You can talk to outside lines (Ll) (L2). That is, first, the 7 flip-flops (FF-1) of the hold control circuit (20)
) reset (reset by signals (S2) and (S4)) causes the fifth relay (RY-5) to become inoperable, the hold state is released, and the slave station line control circuit (2
When the AND gate (AIO) is opened by the output of the one-shot multivibrator (27) in 5), the flip-flop (FF-3) is reset and the seventh relay (RY-7) becomes inactive, and the flip-flop (
By resetting FF-4), the fourth relay (RY-4) is made inactive, thereby connecting the outside lines (Ll) (L2) and the line of the master station, and making a call possible. At this time, the relay contact (RY
S-4) is a shorting type, and the line will not be disconnected when returning from the B side to the A side contact.

In addition, the line connection detection circuit (21) activates the sixth relay (RY-
6) is excited and cuts off the line to the slave station. Also, when the relay contact (RYS-62) closes, a tone signal (f5) is generated from the line use signal generation circuit (22),
Sent to slave station. In the slave station, upon detection of the tone signal (f5), the flip-flop (FF-9) is reset and set to a reception standby state. In other words, when transferring from a slave station, if you operate the transfer switch (26) on the master station and a call between the master station and the outside line becomes possible (meaning the end of the call on the slave station), the slave station will be automatically transferred. Since the mobile station returns to the reception standby state, it is possible to prevent the slave station from forgetting the termination operation. After the call is over, the initial state is restored by returning the handset (T6 in FIG. 15).

In addition, if the master station does not respond even if the slave station transfers it to the master station,
Since the AND gates (A3) (A7) are not opened, the transfer operation can be canceled and the call to the outside line can be made without any effect on the master station.

Next, the operation of calling an outside line from the master station or slave station will be explained. First, when making a call from the master station, you can make a call to an outside line by picking up the handset and dialing, just like with a normal telephone. At this time, the line connection detection circuit (21
), the sixth relay (RY-6) is energized, thereby cutting off the line to the slave station as described above, and
A tone signal (f5) is transmitted to the slave station.

Next, when the slave station makes a call to an outside line, it first closes the response switch (64) or transmits a tone signal (f2). Upon reception of the tone signal (f2) from the slave station, the master station is set to the transmitting state as described above, and the relay contact (RY
S-21)) Connect the line between the slave station and the outside line.

After the slave station receives the dial tone sent from the exchange through the line connection, it dials using the dial pulse generation circuit (61).The tone signal (f2) is modulated according to the dial pulse, and the relay contact is activated accordingly. (RYS-21) is opened and closed and dial pulses are sent to the outside line. When the other party answers, you can talk between the outside line and the slave station. At this time, by opening the AND gate (^l), the third relay (RY-3) is energized, which disconnects the line of the master station as described above, and also closes the reset switch (41) while the slave station is talking. ) is operated to prevent the slave station from being reset. Also, telephone (2)
Even if you pick up the handset, the 6th relay (RY-6) is inoperative and the relay contact (RYS-62) remains closed.
It is also possible to prevent the slave station from being reset by operating the handset. Furthermore, the lighting of the light emitting display element (P1) notifies the master station that the slave station is currently talking to an outside line. After the call ends, by operating the response switch (64) again, both the master station and the slave station are returned to the reception standby state.

Next, the malfunction prevention device for the switch will be explained.

First, the transfer switch (26) of the master station selects A when the output signal (S2) of the line connection detection circuit (21) is not present as shown in FIG.
ND game} (A4) is not opened, so even if the transfer switch (26) is operated in the receiving standby state, the fifth relay (RY-5) will be energized and the outside line will be put on hold. There isn't. In addition, the reset switch (41) is connected via a relay contact (RYS-32), and when the relay contact (RYS-32) of the slave station is opened, the reset switch (41) may be operated incorrectly. Prevents the station from being reset.

Next, in the case of a slave station, when the response switch (64) is operated, the outside line and the slave station line are connected as described above, so careless operation must be prevented. In the present invention, if there is no dial operation within a predetermined time after the response switch (64) is operated, the device is automatically returned to the reception standby state. That is, as shown in FIGS. 9 and 16, the tone signal (f
2) When only the response switch (64) is operated, the output of the timer circuit (39) is activated by opening the AND gate (A13) and generates an output pulse after a predetermined period of time. , AND gate (A14
) is opened, transistor (Q8) becomes conductive, and the eighth relay (
By energizing the relay contact (RYS
-8) and generates a tone signal (f5) as a line usage signal, the slave station resets the 7 flip-flop (FF-9) upon detection of the tone signal (f5) and sets it to a reception standby state. do. Therefore, the response switch (64)
If there is no dial pulse within a predetermined period of time after the button is operated, the device automatically returns to the reception standby state.

However, when making a call from a slave station to an outside line, a dial pulse is always generated, so as shown in Figure 17, the 7 flip-flop (FF-8) is set at the falling edge of the dial pulse, causing a timer output. Even if the AND game is generated, the 8th relay (RY
-8) is inactive, and the slave station is not reset and calls can be made to outside lines. In this way, erroneous operation of the response switch (64) is prevented.

Next, if the intercom switch (65) is operated incorrectly, a paging signal will be generated at the master station and the person at the master station will be called, but when the person at the master station answers, the person at the slave station will not respond. If there is no signal, the person at the master station can tell that the operation was erroneous, and in that case, the reset switch (41) can be used to return the slave station to the reception standby state. Further transfer switch (66)
Even if the is operated incorrectly, the AND gate (A3) (A
7) The configuration is such that (A9) is not opened and the outside line is not placed on hold, so there is no effect on the master station or outside line. In addition, when making a call to an outside line from a slave station or operating an intercom, if the master station is malfunctioning, the power of the master station is turned off, or the slave station is out of range of the master station, the response switch (64) or intercom switch ( 65), the master station is not set to the transmitting state, so the slave station does not receive the carrier wave from the master station, and the carrier wave detection circuit (
55) disappears, the transistor (QIO) becomes non-conductive, and the light-emitting display element (P4) lights up, indicating that the master station is malfunctioning or out of communication range.

The above explanation was for a pulse dial, but it can also be applied to a tone dial by simply changing the pulse generating circuit (40) of the reset circuit (37) to change the pulse by detecting the tone frequency of the dial. It is applicable.

(g) Effects of the Invention As described above, the present invention provides a transmission means capable of transmitting a signal instructing a call to a master station and a slave station, and instructs the master station to make a call from the slave station. Notifying means for always notifying that the slave station is talking by receiving a signal, and controlling the notifying means not to operate when the master station is talking to an outside line even if it receives a signal instructing a call from the slave station. Further, a control means is provided for controlling the transmitting means so that the transmitting means does not operate even if a call operation is performed at the master station while the slave station is talking to an outside line, and the transmitting means is always driven in the slave station by the call operation. Since the system is provided with a control means and a notification means for notifying that the master station is busy on a call based on the reception of a signal instructing a call from the master station, when the master station is talking to an outside line, the slave station Even if a call operation is performed, the parent station's notification means will not operate, and while the slave station is talking to an outside line, the slave station's notification means will not operate even if a call operation is performed at the master station, resulting in a confidential call state. Matching notifications can be made. In addition, while the slave station is talking to an outside line, the transmitter is controlled so that it does not operate even if the master station performs a call operation, which improves the call quality at the slave station and allows the slave station to communicate with the outside line. In the middle, there is no need to judge whether or not to make a notification, and the system can be handled without providing a secret function.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the master station of the cordless telephone device of the present invention, FIG. 2 is a diagram showing the configuration of the slave station, and FIG. 3 is a diagram showing the configuration of the hybrid transformer circuit of FIG. 1. 4 is a diagram showing the structure of the hold control circuit, FIG. 5 is a diagram showing the Wi command of the line connection detection circuit, and FIG. 6 is a diagram showing the structure of the slave station line control circuit. Figure 7 is the same <1
1. A diagram showing lI or of the second bell signal detection circuit, FIG. 8 is a diagram also showing *O of the calling signal control circuit, FIG. 1s11
Figure, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16
17 and 17 are time charts for explaining the operating states of the master station and slave stations. (1)... Master station transceiver, (2)... Telephone, (
3)...Hybrid transformer circuit, (5)...Transmission circuit, (7)...Reception circuit, (12)...Tone signal f1 generation circuit, (14)...Call switch, (
15)...First bell signal detection circuit, (16)...Tone signal f2 detection circuit, (17)...Tone signal f3
Detection circuit, (18)...Tone signal f4 detection circuit, (
19)... Second bell signal detection circuit, (20)... Hold control circuit, (21)... Line connection detection circuit, (22)...
)...Line use signal generation circuit, (25)...Slave station line control circuit, (26)...Transfer switch, (30)...
... Call signal generation circuit, (31) ... Call signal control circuit, (37) ... Reset circuit, (41) ...
Reset switch, (42)...receiving section, (43)...
... Transmission section, (49) ... Tone signal f1 detection circuit,
(53)...Tone signal f5 detection circuit, (58)...
-Tone signal f2 generation circuit, (59)...Tone signal f3 generation circuit, (60)...Tone signal f4 generation circuit, (61)...Dial pulse generation circuit, (64)...
. . . Response switch, (65) . . . Intercom switch, (66) . . . Transfer switch.

Claims (1)

[Claims] (1) A master station connected to a telephone line and equipped with a transmitter/receiver,
Consisting of slave stations connected wirelessly, the slave station is connected to an outside line via the master station, and when the master station is talking to the outside line, it blocks the conversation between the slave station and the outside line, and In a cordless telephone device having a privacy function that blocks communication between the base station and the outside line while the station is talking to an outside line, a transmitting means capable of transmitting a signal instructing a call to the base station and the slave station is provided,
and a notification means for constantly notifying the master station that the slave station is busy by receiving a signal instructing the slave station to make a call, and for instructing the slave station to make a call when the master station is talking to an outside line. Control means is provided for controlling the notifying means so that it does not operate even if a signal is received, and controlling the transmitting means so that it does not operate even if a call operation is performed at the master station while the slave station is talking to an outside line. , the slave station is provided with a control means for constantly driving the transmitting means in response to a call operation, and a notification means for notifying that the master station is busy on a call based on reception of a signal instructing a call from the master station. A cordless telephone device with special features.