JPH06303185A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To make possible the setting of the current capacity of the power source circuit of a master machine to small capacity and to miniaturize an AC adapter supplying power supply by making the circuit which is provided on a master machine and charges the battery of a slave machine have a constitution that the circuit is made inoperative and does not perform a charging during the operation of the master machine. CONSTITUTION:When a master machine is in a standby mode, only a reception circuit 1 is energized by a power source circuit 7, a transmission circuit 4 is not energized and a relay is made inoperative by controlling a switching transistor 12 by the signal of a control circuit 6. Therefore, when relay contacts 11a and 11b are closed and a slave machine is mounted, the battery of the slave machine is charged by the connection of charging terminals 9 and 10. During a calling, the transistor 12 makes the relay 11 operate by the signal from the circuit b, open contacts 11a and 11b, cut off the terminals 9 and 10 from the circuit 7 and does not charge the battery of the slave machine. Thus, because the charging of the battery is not performed while the master machine is in operation, the capacity of a power source can be set to small capacity, and therefore, an AC adapter can be miniaturized.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cordless telephone device.

[0002]

2. Description of the Related Art A cordless telephone device comprising a master unit connected to a telephone line and a slave unit wirelessly connected to the master unit is disclosed in, for example, Japanese Utility Model Publication No. 61-83350. Generally, the slave unit is driven by a rechargeable secondary battery, the master unit is provided with a charging circuit for charging the battery, and the slave unit is mounted on the master unit to be charged. .

When the slave unit is placed during operation of the master unit, the master unit requires an operating current of the master unit and a charging current for charging the battery of the slave unit, so that the master unit has an AC current. When the power is supplied by an adapter, increasing the current capacity increases the size of the adapter and increases the cost, so improvement has been demanded.

In Japanese Patent Laid-Open No. 258538/1986, if a call is received while the master unit is being charged, the transmission circuit of the master unit is not operated but the charging terminal is used. There is one that tries to suppress the operating current of the master unit by sending an incoming call detection signal to the slave unit, but in this case, the master unit is provided with a circuit for sending an incoming signal to the charging terminal,
In addition, a circuit for detecting an incoming signal from the charging terminal has to be provided in the child device, which complicates the configuration.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a cordless telephone device configured to disable the battery charging circuit of the slave unit while the master unit is operating. It is provided.

[0006]

According to the present invention, a master unit is provided with a charging circuit for charging a battery of a slave unit, and means for disabling the charging circuit during operation of the master unit.

[0007]

Since the present invention is configured as described above, when the slave unit is placed while the master unit is in the standby state, the charging circuit operates to charge the battery of the slave unit. When the machine is on the charging circuit is deactivated and charging is not performed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a master unit, in which (1) is a receiving circuit for receiving a signal from a slave unit, and the received signal is supplied to a hybrid transformer circuit (3) through an amplifier circuit (2). There is. The hybrid transformer circuit (3) is a telephone line (L
1) It is connected to (L2). (4) is a telephone line (L
1) A voice signal from (L2) is supplied via the hybrid transformer circuit (3) by a transmission circuit, and is configured to be transmitted to a slave unit. (5) is a bell signal detection circuit for detecting a bell signal at the time of incoming call, and the detection output is supplied to the transmission circuit (4). (6) is a control circuit for controlling the entire master unit, which detects the call request signal and dial signal from the slave unit included in the reception signal from the reception circuit (1), and the control circuit in the hybrid transformer circuit (3) A telephone line is connected by closing a switch contact (not shown), and dial oscillation is controlled, and the transmission circuit (4) and the like are set to an operating state by detecting an incoming call by the bell signal detection circuit (5). Control. (7) is a power supply circuit that supplies a drive voltage to the base unit, which is supplied with a voltage from an AC adapter (8) to supply the drive voltage to each unit, and a slave unit via relay contacts (11a) (11b). The charging voltage is supplied to the charging terminals (9) and (10) to which is connected. (11)
Is a relay which is driven and controlled by the control circuit (6), and when the master unit is in the standby mode, the control circuit (6) supplies an L-level signal to the switching transistor (12) to render it inoperative and to the relay contact (11a) ( 11b) is closed, and during operation, an H level signal is supplied from the control circuit (6) to the switching transistor (12) to operate and open the relay contacts (11a) (11b).

FIG. 2 is a diagram showing the construction of the slave unit. (13)
Is a speaker (15) in which the signal received by the receiving circuit for receiving the signal from the base unit is amplified by the amplifying circuit (14)
Be loud. (16) is a transmission circuit for transmitting a signal from the slave unit to the master unit, the output signal of the microphone (17), the output signal of the dial signal generation circuit (18), and the output from the control circuit (19). The signal is being supplied. The control circuit (19) controls the dial signal generation circuit (18) based on the dial number input from the keyboard (20) and also generates a control signal such as a call request signal.
(21) is composed of a secondary battery that can be charged by a power supply battery that drives a child device, and is connected to charging terminals (22) and (23) connected to charging terminals (9) and (10) of the parent device. . (2
Reference numeral 4) is a call switch, which supplies the battery voltage to the receiving circuit (13) through the diode (25) and directly to the transmitting circuit (16) in the call mode. In the standby mode, only the receiving circuit (13) is supplied with the drive voltage and is set in the operating state.

Next, the operation of the present invention having such a configuration will be described.

First, when the base unit is in the standby mode, only the receiving circuit (1) is energized by the power supply circuit (7).
The transmission circuit (4) is not energized, and an L level signal is supplied from the control circuit (6) to the switching transistor (12), and the relay contacts (11a) (11b) due to the non-operation of the relay (11). Charging terminal by closing (9)
The charging voltage is supplied to (10). Therefore, when the slave unit is placed on the master unit at this time, the charging terminals (9) (10)
By connecting (22) and (23), the battery (21) of the child device is charged.

Therefore, when the call switch (24) of the handset is set to the call mode to make a call, the control circuit (1)
When the call request signal is generated from 9) and is transmitted to the master unit by the transmission circuit (16), the control circuit (6) of the master unit that detects the call request signal connects the telephone lines (L1) and (L2). At the same time, the power supply circuit (7) is controlled to supply a drive voltage to the transmission circuit (4) to set it in an operating state. When the cordless handset is operated after the telephone line is connected, a dial signal is transmitted to the base unit, and the control circuit (6) of the base unit that receives the dial signal dials the telephone line (L1) (L2). I do. If the other party responds to the dialed call, the child device person can talk by using the speaker (15) and the microphone (17).

Next, when there is an incoming call on the telephone lines (L1) and (L2), the incoming signal is transmitted to the handset by detection of the incoming call by the bell signal detection circuit (5), and the speaker (15) of the handset.
The call is announced by and the person in the handset is notified of the incoming call. Then, when the person of the child device who notices the incoming call switches the call switch (24) from the standby mode to the call mode, the person of the child device can talk with the caller in the same manner as described above.

Thus, during a call, an H level signal is supplied to the switching transistor (12) from the control circuit (6) of the master unit, and the relay contact (11a) is activated by the operation of the relay (11). ) (11b) is opened and disconnected from the charging terminals (9), (10) and the power supply circuit (7), so when the call is temporarily suspended, the slave unit is not placed on the master unit. However, the battery (21) of the child device is not charged.

The call switch (24) of the child device after ending the call
Control circuit (6) of the base unit that detects that the standby mode has been switched when is switched to the standby mode
Controls the power supply circuit (7) to stop the energization of the transmission circuit (4) to make the transmission circuit (4) inoperative, and switches the signal to the switching transistor (12) to the L level, and the relay (11 ) Not working, relay contact (11a)
Since (11b) is closed, the battery (21) of the child device is charged when the child device is placed on the parent device.

[0016]

As described above, in the cordless telephone device of the present invention, the current capacity of the power supply circuit of the master unit can be reduced by disabling the charging circuit for charging the battery of the slave unit while the master unit is operating. It can be set to a small size, and the AC adapter that supplies power can be small, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a master unit of a cordless telephone device of the present invention.

FIG. 2 is a block diagram showing a configuration of a child device of the cordless telephone device of the present invention.

[Explanation of symbols]

 1 Receiving Circuit 4 Transmitting Circuit 6 Control Circuit 7 Power Supply Circuit 9 Charging Terminal 10 Charging Terminal 13 Receiving Circuit 16 Transmitting Circuit 19 Control Circuit 22 Charging Terminal 23 Charging Terminal

Claims (1)

[Claims] 1. A cordless telephone device comprising a master unit connected to a telephone line and a slave unit wirelessly connected to the master unit,
A cordless telephone device characterized in that a base unit is provided with a charging circuit for charging a power supply battery of the base unit and a control means for disabling the charging circuit while the transmission circuit of the base unit is operating.