JPH0448030Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a wireless telephone having a base unit connected to a telephone line and a slave unit that communicates with the base unit wirelessly, and in particular performs a hold operation. Regarding wireless telephones. (b) Prior art In wireless telephones that enable telephone calls by transmitting and receiving signals wirelessly between a base unit connected to a telephone line and a portable handset, the base unit is generally Since it is installed and used in a fixed location, it receives operating power from a commercial power supply, and the handset receives operating power from a built-in secondary battery for making calls. For this reason, when the handset is not making a call, it is placed on the cradle of the base unit or on the charging surface of the charger to charge the secondary battery. For example, such technology is disclosed in Japanese Patent Application Laid-Open No. 1986-
There is one described in Publication No. 177038. Furthermore, recently, such wireless telephones have been added with a hold operation function similar to that provided in general telephones. In such wireless telephones, when the handset is making a telephone call, when the handset's hold switch is operated, the handset sends a signal corresponding to the hold operation to the base unit, and the base unit disconnects the telephone line. A hold operation is performed for. Furthermore, when you want to release the hold on the phone line, operate the hold release switch on the handset, the handset sends a signal corresponding to the release to the base unit, and the base unit releases the hold on the phone line. Allowing the action to take place. (c) Problems to be solved by the invention The telephone line holding operation performed by the above-mentioned radio telephone is generally performed by operating a hold switch and a hold release switch provided on the handset. Therefore, if the owner of a wireless telephone operates the hold switch while talking on the handset and puts the telephone line on hold, the telephone line will remain on hold unless the owner operates the hold release switch. It remains as it is. Therefore, the owner often felt troubled by having to perform two operations to put the telephone line on hold.
Furthermore, placing a telephone line on hold consumes as much power as making a telephone call.
For this reason, when a handset that operates by receiving operating power from a secondary battery is on hold for a long time, the voltage supplied as the operating power decreases, which may cause trouble when making a call. The present invention solves this problem and provides a wireless telephone with an effective hold operation function. (d) Means for Solving Problems The wireless telephone of the present invention has a hold switch and a hold operation signal generation function that generates a hold operation signal by operating the hold switch in a handset that uses a secondary battery as an operating power source. a charging operation detection circuit that detects when the charging state of the secondary battery is released due to operation of the holding switch; and a holding operation detecting circuit that generates a holding release signal based on the detection output of the charging operation detection circuit. A release signal generation circuit is provided, a hold operation signal detection circuit detects the hold operation signal in the base unit, and a detection output of the hold operation signal detection circuit,
A hold voice signal generation circuit that becomes operational and sends a hold voice signal to the telephone line; and a hold release signal detection circuit that makes the hold voice signal generation circuit inactive when detecting the hold release signal. It is composed of (E) Function In the wireless telephone of the present invention, when the hold switch of the handset is operated during a call operation, the hold operation signal generation circuit and the charging operation detection circuit are activated, and the charging operation detection circuit is activated to charge the secondary battery. When the operation is detected, the hold operation signal generation circuit transmits a hold operation signal to the base unit, and in the base unit, the hold operation signal is detected by the hold operation signal detection circuit, thereby generating a hold audio signal. When the circuit becomes operational, a hold voice signal is sent to the telephone line, a hold operation is performed, and in this state, the secondary battery in the handset is brought into a charging state, and then the charging state is released.
The charging operation detection circuit outputs a detection output, and in response, the hold release signal generation circuit enters an operating state, transmits a hold release signal to the base unit, and causes the hold release signal detection circuit of the base unit to detect it, thereby: With the hold audio signal generation circuit inactive,
This makes it possible to make calls using a handset again. (f) Example An example of the wireless telephone of the present invention is shown in Figures 1 and 2.
This will be explained using FIG. 1 and 3 show a handset 1 and a charger 2 of a wireless telephone,
FIG. 2 shows the base unit 2 of the wireless telephone. First, in Figures 1 and 3, 3 is an antenna, 4
receives the signal transmitted from the base unit 2 via the antenna 3 and demodulates the signal.
a demodulation circuit; 5 is a first modulation circuit that modulates a signal to be transmitted to the base unit 2 via the antenna 3;
6 is a first amplifier circuit that amplifies the output of the first demodulation circuit 4; 7 is a speaker that emits the output of the first amplifier circuit 6; and 8 is an audio signal from the microphone 9 that is added to the first modulation circuit 5. A second amplification circuit 10 corresponds to the operation of the keyboard switch 11 and applies a dial signal generated by a dial signal generation circuit that generates a dial signal to the first modulation circuit 5 and transmits the dial signal via the antenna 3. , base unit 2
Send to. 12 is activated when a hold switch 13 (a non-lock type is used in this embodiment) is operated, and the second amplifier circuit 8 is rendered inactive so that the audio signal applied to the microphone 9 is not activated. The handset mute circuit 14, which is prevented from being transmitted to the first modulation circuit 5, is similar to the handset mute circuit 12 and generates a hold operation signal that becomes active in response to the operation of the hold switch 13 and generates a hold operation signal. The hold operation signal generated in the circuit is applied to the first modulation circuit 5 and sent to the base unit 2 via the antenna 3. Numeral 15 is a charging operation detection circuit which, like the holding operation signal generating circuit 14, becomes active in response to the operation of the holding switch 13, and outputs a detection output when a charging voltage is once applied to the charging input terminal described later and is no longer applied again. It is configured so that it can be released. 1
6 is a hold release switch, and 17 is activated when a detection output is output from the charging operation detection circuit 15 or the hold release switch 16 is operated, generates a hold release signal, and transmits the hold release signal to the parent. A hold release signal generation circuit 18 is used to detect the operation of the hold switch 13 and the charging operation detection circuit 15.
Based on the detection output of
A slave unit control circuit 19 controls the operation of the slave unit control circuit 18, and a secondary battery 19 is charged with an operating voltage for the slave unit control circuit 18, and supplies operating power to the slave unit control circuit 18 via a power switch 20. ing. Reference numeral 21 denotes a charging input terminal for applying a charging voltage to the secondary battery 19. Reference numeral 22 denotes a mode changeover switch; when the power switch 20 is closed and the handset 1 is in a standby state, when the handset 1 is operated, the handset 1 goes into a talk state; when operated when the handset 1 is in a call state, the mode changeover switch changes the mode. A non-lock switch was used for handset 1 to put it in standby mode. 23 is a pilot signal generation circuit which generates a pilot signal under the control of the handset control circuit 18 and sends it to the base unit 2 when the handset 1 is placed in a talking state by operating the mode changeover switch 22; 24 is a charger which connects the handset to the handset; The secondary battery 19 of No. 1 is charged. 25 is a charging output terminal provided on the charger 24 , and when it comes into contact with the charging input terminal 21 of the handset 1 , a charging voltage is applied. The charger 24 converts the voltage from the commercial power source into a charging voltage and applies it to a charging output terminal 25. Then the second
In the figure, 26 is the antenna of the base unit 2 , 27 is a second demodulation circuit that receives the signal transmitted from the slave unit 1 via the antenna 26, and demodulates the signal, and 28 is the antenna 26. 29 is a third amplifier circuit that amplifies the output of the second demodulation circuit 27; 30 is the second modulation circuit 28;
a fourth amplifier circuit for amplifying the signal added to the
is a telephone line; 32 is connected to the telephone line 31 via a switch 33 that opens and closes the telephone line 31; 4 a hybrid circuit for adding an audio signal via the telephone line 31 to the amplifier circuit 30; 34 a ringer signal detection circuit for detecting a ringer signal transmitted via the telephone line 31; 35 a ringer signal detection circuit for detecting a ringer signal transmitted via the telephone line 31; An operation of receiving the detection output of the signal detection circuit 34, controlling the sound emission signal generation circuit 36 to generate an audio signal corresponding to the ringer signal, and emitting the audio signal from the speaker 38 via the power amplification circuit 37. While the control circuit 39, which performs control and also controls the operation of each circuit provided in the base unit 2 , detects the pilot signal transmitted from the slave unit 1 ,
a pilot signal detection circuit 40 for operating the control circuit 35 to open the switch 33;
41 is a switch circuit that applies a part of the audio signal output from the sound emitting signal generation circuit 36 to the second modulation circuit 28 under the control of the control circuit 35; 41 is a switch circuit that detects a hold operation signal transmitted from the handset 1 ; The second demodulation circuit 27 is a pending operation signal detection circuit that performs
The detection output of the pending operation signal detection circuit 41 is applied to the control circuit 35. Reference numeral 42 denotes a base unit mute circuit which, when the detection output of the hold operation signal detection circuit 41 is output, makes the fourth amplifier circuit 30 inactive under the control of the control circuit 35, and transmits the signal via the telephone line 31. The audio signal is prevented from being transmitted to the second modulation circuit 28. Reference numeral 43 denotes a held voice signal generated by a held voice signal generation circuit which is activated under the control of the control circuit 35 in response to the holding operation signal detection operation of the held operation signal detection circuit 41 and generates a held voice signal. is sent to the telephone line via the third amplifier circuit 29-hybrid circuit 32. Reference numeral 44 denotes a hold release signal detection circuit for detecting a hold release signal transmitted from the handset 1 , which directly detects the hold release signal from the output of the second demodulation circuit 28, applies the detection output to the control circuit 35, and detects the hold release signal transmitted from the handset 1. The control circuit 35 controls the hold audio signal generation circuit 43.
The operation of the telephone line 31 is made inactive, and a call can be made via the telephone line 31. The above-mentioned components constitute the wireless telephone of the present invention. Next, the operation of the wireless telephone according to the present invention will be explained. First, the charging operation for the secondary battery 19 provided in the handset 1 will be described. Charger 24 for handset 1
, and the charging input terminal 21 of the handset 1 is brought into contact with the charging output terminal 25 of the charger 24 .
This operation causes the charge output terminal 2 of the charger 24 to
5 applies charging voltage to the charging input terminal 21 of the handset 1 . In such a state, if the power switch 20 of the handset 1 is open, so-called off, the charging voltage applied to the charging input terminal 21 is applied only to the secondary battery 19, and the secondary battery 19 is charged. Further, if the power switch 20 of the slave unit 1 is closed, so-called on state, an operating voltage is applied to the slave unit control circuit 18, and the slave unit 1
If the device is placed in a standby state, the charging voltage applied to the charging input terminal 21 is supplied to the handset control circuit 18 as an operating voltage via the power switch 20, which is connected to the secondary battery 19.
It also joins and is charged. Next, the incoming and outgoing operations of the wireless telephone of the present invention will be explained. In the incoming call operation, it is assumed that the power switch 20 of the handset 1 is closed and the handset 1 is placed in a standby state. In such a state, when a ringer signal is transmitted through the telephone line 31 and applied to the base unit 2 of the wireless telephone, the base unit 2 transmits the ringer signal to the ringer signal detection circuit 3.
4, and in response to the detection, the control circuit 35 controls the sound emitting signal generation circuit 36 to generate an audio signal corresponding to the ringer signal, which is amplified by the power amplification circuit 37, and then output to the speaker of the base unit 2 . At the same time, the control circuit 35 controls the switch circuit 40 to put it into operation, and adds the audio signal outputted from the sound emission signal generation circuit 36 to the second modulation circuit 28 to modulate it. Have handset 1 send the data. Corresponding to this operation, the handset 1 in a standby state receives an audio signal corresponding to the ringer signal transmitted from the base unit 2 via the antenna 3, demodulates it in the first demodulation circuit 4, and performs first amplification. The sound is amplified by the circuit 6 and emitted by the speaker 7 of the handset 1 . In such a state, when the handset 1 is picked up and the mode changeover switch 22 is pressed down in response to the emission of the audio signal corresponding to the ringer signal, the handset control circuit 18 of the handset 1 operates the mode changeover switch 22. In response to this, the first demodulation circuit 4 is made to continue operating, and the first modulation circuit 5 is made to be in the operating state, and the pilot signal generation circuit 23 is also made to be in the operating state, and the first modulation circuit 5 is made to be in the operating state. A pilot signal is sent out, and the pilot signal is transmitted to the base unit 2 via the antenna 3. As a result, in the base unit 2 , the pilot signal is received by the antenna 26, demodulated by the second demodulation circuit 27, detected by the pilot signal detection circuit 39, and outputted to the control circuit 35. This operation causes the control circuit 35 to close the switch 33 and close the hybrid circuit 32.
is connected to the telephone line 31. As a result, the voltage of the telephone line 31 decreases to an off-hook voltage, the ringer signal that has been transmitted via the telephone line 31 is no longer transmitted, and the telephone line 31 becomes available for communication. In such a situation, handset 1 is sent to the caller.
When the owner makes a sound to the microphone 9 of the slave unit 1 , the sound is transmitted to the base unit 2 via the microphone 9, the second amplification circuit 8, the first modulation circuit 5, and the antenna 3. As a result, base unit 2 transmits the audio transmitted from slave unit 1 to antenna 26 - second demodulation circuit 27 - third amplifier circuit 29 - hybrid circuit 32.
- added to telephone line 31 via switch 33 and transmitted to the calling party; On the other hand, telephone line 31
The voice from the caller transmitted via the telephone line 31 is transmitted to the antenna 26 via the hybrid circuit 32 - fourth amplifier circuit 30 - second modulation circuit 28.
is sent to handset 1 . As a result, the handset 1 adds the audio transmitted from the base unit 2 to the speaker 7 via the antenna 3 - first demodulation circuit 4 - first amplifier circuit 6, and sends the voice of the caller to the owner of the handset 1 . A call can be made between the calling party and the owner of the handset 1 by transmitting the voice. Even in such a state, the pilot signal generation circuit 23 of the slave unit 1 generates a pilot signal and transmits it to the base unit 2 . Next, in the outgoing operation, pick up the handset 1 , and with the power switch 20 of the handset 1 closed, press down the mode changeover switch 22 to set the handset 1 to a ready state under the control of the handset control circuit 18. In response to such an operation, the handset control circuit 18 controls the first demodulation circuit 4 and the first modulation circuit 5.
The parott signal generation circuit 2 is activated.
3 into an operating state and causes the base unit 2 to send out a pilot signal. On the other hand, the master unit 2 receives the pilot signal from the slave unit 1 , causes the pilot signal detection circuit 39 to detect it, and controls the control circuit 35 to switch the control circuit 3 to the control circuit 35.
3 is closed and the hybrid circuit 32 is connected to the telephone line 31 via the switch 33, making it possible to make a call. In such a state , when the keyboard switch 11 of the handset 1 is operated to cause the dial signal generation circuit 10 to generate a dial signal corresponding to the desired telephone number of the other party, the dial signal is transmitted from the first modulation circuit 5 to the antenna 3. -Antenna 2
6-second demodulation circuit 27-third amplifier circuit 29-hybrid circuit 32-fukuswitch 33 , the signal is sent from handset 1 to telephone line 31 via base unit 2. Through this action, the desired party is called,
The other party and the person in possession of handset 1 can make a telephone conversation using the same operation as in the case of receiving a call. Through the above-described operations, it is possible to make a telephone call via the telephone line 31 using the wireless telephone. Next, the operation related to holding, which is the purpose of the present invention, will be explained. First, by the operation described above,
It is assumed that the wireless telephone is in a state where a telephone call is being made via the telephone line 31 while the handset 1 continues to output a pilot signal to the base unit 2 . In order to perform a hold operation in such a state, when the hold switch 13 provided on the handset 1 is operated, the hold switch 1
The handset control circuit 18 detects the operation No. 3, puts the handset mute circuit 12 into an active state, causes the second amplifier circuit 8 to become inactive by the handset mute circuit 12, and outputs the microphone to the first modulation circuit 5. 9 prevents audio signals from being transmitted. Further, the handset control circuit 18 causes the hold operation signal generation circuit 14 to be activated to generate a hold operation signal, and the first modulation circuit 5
- Transmit to base unit 2 via antenna 3. At this time, the charging operation detection circuit 15 is also brought into operation under the control of the slave device control circuit 18. Even in such a state, the handset 1 continues to issue a pilot signal to the base unit 2 . Furthermore, in such a state , base unit 2
The pending operation signal from the pending operation signal generation circuit 17 is received by the antenna 26, demodulated by the second demodulation circuit 27, and then detected by the pending operation detection circuit 41.
Due to this detection, the suspended operation detection circuit 41 applies a detection output to the control circuit 35, and the control circuit 3
5, the base unit mute circuit 42 becomes active, and the fourth amplifier circuit 30 becomes inactive, so that the audio signal transmitted from the telephone line 31 is not applied to the second modulation circuit 28. Further, the control circuit 35 also controls the hold audio signal generation circuit 43 at the same time as the base unit mute circuit 42 to put it into operation, generate the hold audio signal, and transfer the generated hold audio signal to the third amplifier circuit 29. After amplification, the hybrid circuit 32 - the switch 33
to the telephone line 31 and send it to the other party,
Notify the telephone line 31 that the wireless telephone has been placed on hold. In such a state, if the handset 1 is placed on the charging surface of the charger 24 as shown in FIGS. 1 and 3, the charging input terminal 21 and the charging output terminal 25 are in contact with each other. The voltage applied to the charging output terminal 25 of the charger 24 is applied to the charging input terminal 21 of the slave unit 1 , and is applied as an operating voltage to the slave unit control circuit 18 via the power switch 20 in the closed state. The next battery 19 is charged. In such a state, the charging operation detection circuit 15
detects that voltage is applied to charging input terminal 21 of handset 1 , but does not output any output, so no change occurs in handset 1 , and the handset remains on the charging surface of charger 24 . The second amplifier circuit 8 of the device 1 remains inactive due to the handset mute circuit 12, which is the same as before the device was placed. Furthermore, since no signal is transmitted from the handset 1 to the handset 22 , the fourth amplifier circuit 3 is still operated by the master unit mute circuit 42.
0 is in an inactive state, and the held audio signal generating circuit 43 is in an active state and transmits a held audio signal to the telephone line 31. Therefore, both handset 1 and base unit 2 are on hold with respect to telephone line 31. Note that even in this state, the handset 1 is still sending out a pilot signal to the base unit 2 . Furthermore, in such a state, if the handset 1 is separated from the charger 24 , the voltage from the charging output terminal 25 of the charger 24 is no longer applied to the charging input terminal 21 of the handset 1 , so that the handset control circuit 18 The operating voltage is now received from the secondary battery 19 which was being charged. Further, since the charging operation detection circuit 15 detects that the voltage applied to the charging input terminal 21 of the slave unit 1 is no longer applied, the charging operation detection circuit 15 sends a detection output to the slave unit control circuit 18. put out. Through this operation, the handset control circuit 18 puts the handset mute circuit 12 into a non-operating state so that the audio signal transmitted from the microphone 9 can be transmitted to the first modulation circuit 5 via the second amplifier circuit 8. Further, the handset control circuit 18 controls the handset mute circuit 12 and at the same time activates the hold release signal generation circuit 17 to generate a hold release signal and transmits it to the base unit 2 . Even in such a state, the handset 1 continues to transmit the pilot signal to the base unit 2 . Therefore, in such a state, base unit 2 receives the hold release signal from slave unit 1 via antenna 26, and
After demodulating in the demodulation circuit 27, the hold release signal detection circuit 44 detects the hold release signal.
The detection output of is added to the control circuit 35, and the control circuit 3
5, the base unit mute circuit 42 is made inactive, and the audio signal transmitted via the telephone line 31 is transmitted to the second modulation circuit 28 via the fourth amplifier circuit 30.
At the same time, the hold audio signal generation circuit 43 is also put into an inoperable state by the control circuit 35, and both the handset 1 and the base unit 2 are released from the hold state.
The user of handset 1 is now able to talk, and the owner of handset 1 can talk again with the other party from before the hold operation via telephone line 31 connected to base unit 2 . To end a call in such a state, by pressing down the mode changeover switch 22 of the handset 1 and putting the handset control circuit 18 into a standby state, the handset 1 can switch the handset 1 to the base unit 2 in a hold state and a call state. The pilot signal transmission operation that was always being sent will stop.
At the same time, the handset 1 enters a state in which only the first demodulation circuit 4 is operating under the control of the handset control circuit 18. On the other hand, at the same time that the base unit 2 becomes unable to receive the pilot signal, the control circuit 35 controls the switch 33 to open the main unit 2, disconnect it from the telephone line 31, and enter the standby state. Furthermore, when the wireless telephone is on hold as described above, the hold release switch 1 provided on handset 1
6, the handset control circuit 18 disables the handset mute circuit 12 and outputs the audio signal via the microphone 9, in the same way as when receiving the detection output of the charging operation detection circuit 15 described above. Master unit 2
At the same time, the hold release signal generation circuit 17 is activated to transmit the hold release signal to the base unit 2. As a result, the base unit 2 also performs the same operation as described above, and the control circuit 35 causes the base unit mute circuit 42 and the hold audio signal generation circuit 4 to
3 is made inactive so that the audio signal transmitted via the telephone line 31 is transmitted to the handset 1 . This operation releases the wireless telephone from the hold state and returns to the talking state. The wireless telephone of the present invention can perform the operations described above. In this embodiment, there is no problem if either a digital signal or an analog signal is used as the output signal of the hold operation signal generation circuit 14 and the hold release signal generation circuit 17 as long as each detection circuit can detect the signal. Furthermore, in the operation of this embodiment, the slave unit mute circuit 12 is controlled by the slave unit control circuit 18.
Although the second amplifier circuit 8 was made inoperable, the second
Instead of disabling the amplifier circuit 8, the audio signal from the microphone 9 may be biased so that it is not applied to the second amplifier circuit 8. Similarly, regarding the base unit mute circuit 42, instead of disabling the fourth amplifier circuit 30, the audio signal from the telephone line 31 may be biased so that it is not applied to the fourth amplifier circuit 30. Furthermore , the charger 24 used in the present invention is one that performs a charging operation on the handset 1 , and any device that has a function of charging the handset 1 is included in the charger 24 . Think of it as something. (G) Effects of the Invention The radio telephone of the present invention can charge the secondary battery of the cordless handset during the hold operation, and the secondary battery does not have to be consumed by the hold operation. Furthermore, since the charging state of the secondary battery has been released, the charging operation detection circuit of the slave unit outputs a detection output, releases the slave unit from hold, and sends a hold release signal to the base unit to release the hold of the slave unit. Operability has been improved by releasing the call from hold and returning the call state.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a handset in an embodiment of the wireless telephone of the present invention, Fig. 2 is a block diagram showing a master unit in an embodiment of the radio telephone of the present invention, and Fig. 3 is a block diagram showing a base unit in an embodiment of the radio telephone of the present invention. FIG. 2 is a perspective view showing the external configuration of a handset and a charger in an embodiment of the wireless telephone. Explanation of main drawing numbers, 12...Slave unit Mute circuit,
14... Hold operation signal generation circuit, 15... Charging operation detection circuit, 17... Hold release signal generation circuit, 1
9... Secondary battery, 24 ... Charger, 41... Hold operation signal detection circuit, 42... Base unit mute circuit,
43... Hold audio signal generation circuit, 44... Hold release signal detection circuit.

Claims (1)

[Scope of utility model registration request] In a wireless telephone comprising a base unit connected to a telephone line and a slave unit communicating with the base unit wirelessly, the slave unit having a secondary battery installed therein, the slave unit includes:
A holding switch, a holding operation signal generation circuit that generates a holding operation signal when the holding switch is operated, and a charging operation detection circuit that detects when the secondary battery is released from the charging state when the holding switch is operated. and a hold release signal generation circuit that generates a hold release signal based on the detection output of the charging operation detection circuit, and a hold operation signal detection circuit that detects the hold operation signal in the base unit, and the hold operation signal detection circuit. a hold voice signal generation circuit that becomes operational upon detection output of the phone line and sends a hold voice signal to the telephone line; and a hold release signal that turns the hold voice signal generation circuit into an inoperable state when the hold release signal is detected. A wireless telephone characterized by being provided with a detection circuit.