JPH04262652A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To prevent sudden wear of a battery in the inside of a master set used as a backup power supply by informing it to the user in busy with a slave set that an AC power supply for control and talking of a master set is failed. CONSTITUTION:A master set 10 is provided with an AC power failure detection circuit 17 detecting AC power failure on the occurrence of an AC power failure and an AC power failure generating circuit 15 outputting information representing the detection of the AC power failure, and a slave set 20 is provided with an AC power failure signal detection circuit 26 receiving information representing the AC power failure outputted from the AC power failure signal generating circuit 15 and outputting a notice tone or the like to inform the occurrence of AC power failure to the user of the slave set.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a cordless telephone, and more particularly, the present invention relates to a cordless telephone, and more particularly, an AC
This invention relates to a cordless telephone that can notify the user of a power outage.

0002

2. Description of the Related Art Cordless telephones generally consist of a base unit connected to a telephone line and a slave unit connected to the base unit via a wireless line. And the main unit is AC
The power supply is used for communication and control, and in the event of an AC power outage, each circuit is backed up by an internal battery.

[0003] Therefore, if the AC power supply is interrupted while the user is making a call using this cordless telephone, the base unit will continue to maintain the call using its internal battery.

0004

[Problems to be Solved by the Invention] However, in conventional cordless telephones, when an AC power outage occurs, the base unit maintains the call using an internal battery, but there is a method for notifying the user that the AC power is out of power. Because there was no , there was a problem that the battery would rapidly drain after a long call.

[0005] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to prevent the AC power supply from failing when there is a power outage in the AC power supply used for communication and control of the base unit. To provide a cordless telephone that notifies a user of the following.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the cordless telephone of the present invention is connected to a telephone line, and uses an AC power source as a power source for communication and control.
C: In a device consisting of a base unit that is configured to be backed up by an internal battery in the event of a power outage, and a slave unit connected to the base unit via a wireless line, the base unit is provided with AC power when an AC power outage occurs. AC power outage detection means for detecting a power outage; and power outage information output means for outputting power outage information to the slave device when the AC power failure detection means detects a power outage of the AC power supply; The apparatus is configured to include a power outage occurrence notification means for notifying a user of the occurrence of a power outage based on power outage information sent from a power outage information output means.

[0007]

[Operation] In the base unit, when the AC power supply used for communication and control is out of power, the AC power outage detection means detects this and provides the detection signal to the power outage information output means.

The power outage information output means generates, for example, a command indicating that a power outage has occurred based on this detection signal, and sends it to the slave device.

On the other hand, when the handset receives this command, it activates a power outage notification means, generates, for example, a notification sound indicating that there is a power outage, and emits the sound from the receiver. Also,
If the power outage notification means is equipped with a display device such as an LED or an LCD, a message indicating that there is a power outage is displayed on the display device. This display is, for example, a text display such as "power outage" or lighting (or flashing) of a lamp indicating a power outage.

[0010] Furthermore, the power outage information output means of the base unit
Based on a detection signal indicating an AC power outage from the power outage detection means,
It is also possible to generate a notification sound to notify of a power outage and transmit this notification sound to the handset side. When a call is in progress using the handset, this notification sound is superimposed on the voice signal of the other party sent through the telephone line and is transmitted to the handset. As a result, the user of the handset hears the notification sound along with the voice of the other party during a call, and can know that there is currently an AC power outage.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an electrical block diagram showing one embodiment of a cordless telephone according to the present invention.

In the figure, the cordless telephone of the present invention includes a base unit 10 connected to a telephone line 1, and a base unit 10 connected to a telephone line 1.
and a slave unit 20 connected via a wireless line.

A speech network circuit 12 is bidirectionally connected to the telephone line 1 via a hook switch 11 for mixing and separating transmitting signals and receiving signals. Further, a transmitting/receiving circuit 13 that modulates and demodulates audio signals, etc. is bidirectionally connected to the speech network circuit 12, and the transmitting/receiving circuit 13 transmits and receives audio signals, etc. An antenna 14 is connected thereto.

The hook switch 11 and the speech network circuit 12 are led to the output of a control circuit 16 that controls the operation of the base unit 10 as a whole. Also,
The transmitting/receiving circuit 13 and the control circuit 16 are bidirectionally connected.

Further, the transmitting/receiving circuit 13 is led to the output of an AC power outage signal generation circuit 15 which generates a signal indicating that the AC power supply 3 is out of power. 16 outputs are led.

The control circuit 16 also detects a power outage of the AC power source 3, and also detects a power outage of the AC power source 3 and the internal battery 1.
The output of the AC power failure detection circuit 17 that switches the connection to the AC power failure detection circuit 17 is connected to the output of the battery 18 and the output of the AC adapter 2 connected to the AC power source 3. The configuration is as follows.

Although not shown, the AC power failure detection circuit 17 supplies power to each circuit of the base unit 10.

During normal operation when power is supplied from the AC power supply 3, the AC power failure detection circuit 17 connects the internal connection to the AC adapter 2 side and transfers the voltage from the AC power supply 3 to the main unit 10. It is supplied to each circuit. And A.C.
When the power supply 3 is out of power, the internal connection is switched from the AC adapter 2 side to the battery 18 side, and voltage from the battery 18 is supplied to each circuit of the base unit 10.

The AC power failure detection circuit 17 is configured to detect a power failure in the AC power supply 3 and output a detection signal to the control circuit 16.

When the control circuit 16 receives a detection signal indicating a power outage of the AC power supply 3 from the AC power outage detection circuit 17, the control circuit 16
A drive control signal is output to the C power outage signal generation circuit 15. Based on this drive control signal, the AC power outage signal generation circuit 15 generates a command indicating that an AC power outage has occurred, and outputs it to the transmitting/receiving circuit 13.

On the other hand, the handset 20 is equipped with an antenna 21 for transmitting and receiving audio signals, etc., to and from the base unit 10, and this antenna 21 includes a transmitting/receiving circuit that modulates and demodulates the audio signals, etc. 22 are connected.

The transmitter/receiver circuit 22 is also connected to the output of the transmitter 24 and the input of the receiver 25, and also includes an AC power failure signal detection circuit 26 for detecting commands sent from the base unit 10. The output of the AC power failure signal detection circuit 26 is connected to the input of the receiver 25.

Further, the output of a dial circuit 27 that detects an input operation from an operation section (not shown) and makes a dial call, etc. is led to a control circuit 23 that controls the overall operation of the handset 20. 23 and the transmitting/receiving circuit 22 are bidirectionally connected.

The AC power outage signal detection circuit 26 detects a command sent from the base unit 10, generates a notification sound based on the detected command, and outputs it to the receiver 25.

Next, the operation of the cordless telephone with the above configuration will be explained. In a normal operating state where power is supplied from the AC power supply 3, the AC power failure detection circuit 17 has its internal connection connected to the AC adapter 2 side, and therefore each circuit of the base unit 10 is connected to the AC power supply 3. Voltage is supplied from

In this state, when a call arrives from the other party's terminal through the wired line 1, for example, the call is detected by an incoming call detection circuit (not shown), and an incoming call detection signal is given to the control circuit 16.

The control circuit 16 outputs this incoming call detection signal to the transmitting/receiving circuit 13, and transmits it from the antenna 14 to the handset 20 using the control channel. In the handset 20, this incoming call detection signal is sent to the transmitter/receiver circuit 22 via the antenna 21.
and sends it to the control circuit 23. The control circuit 23 outputs a ringing tone from an internal speaker (not shown) based on this incoming call detection signal.

When the user presses a call button (not shown) on the handset 20 in response, a response signal indicating this call operation is sent from the transmitter/receiver circuit 22 to the base unit 10 via the antenna 21.
sent to the side. After this, the handset 20 switches from the control channel to the communication channel.

On the other hand, in the main unit 10, this response signal is received by the transmitting/receiving circuit 13 via the antenna 14, and the control circuit 1
Send on 6. Based on this response signal, the control circuit 16 outputs a control signal to the hook switch 11 to close the hook switch 11 and connect the telephone line 1 and the speech network circuit 12. After this, base unit 10 also switches from the control channel to the call channel.

[0031] This allows communication between the slave unit 20 and an outside line via the base unit 10. That is, the voice signal sent from the other party's terminal through the telephone line 1 is sent to the transmitter/receiver circuit 13 via the hook switch 11 and the speech network circuit 12, where the carrier signal is modulated and sent from the antenna 14 to the handset 20. sent to the side.

[0032] In the handset 20, this transmitted radio wave is transmitted to the antenna 2.
1, the received signal is received by the transmitting/receiving circuit 22, where it is demodulated and output to the receiver 25.

On the other hand, the user's voice signal input from the transmitter 24 of the handset 20 is guided to the transmitter/receiver circuit 22, where the carrier signal is modulated and transmitted from the antenna 21 to the base unit 10 side. .

[0034] In base unit 10, this transmitted radio wave is transmitted to antenna 1.
4, the received signal is received by the transmitting/receiving circuit 13, where it is demodulated and outputted to the speech network circuit 12, and then outputted to the telephone line 1 via the hook switch 11.

Next, the operation when the AC power supply 3 is interrupted during a telephone call as described above will be explained.

When the AC power supply 3 is interrupted while the handset 20 is talking to an outside line, the AC power failure detection circuit 17 detects this and outputs a detection signal to the control circuit 16.

At the same time, the AC power failure detection circuit 17
Switch the internal connection from the AC adapter 2 side to the built-in battery 18 side. As a result, voltage from the battery 18 will be supplied to each circuit of the base unit 10 from now on.

On the other hand, the control circuit 16 receives the detection signal from the AC power failure detection circuit 17, and based on this detection signal, the control circuit 16
A drive control signal is output to the C power outage signal generation circuit 15, and the AC
The power outage signal generation circuit 15 is activated. This allows the AC
The power outage signal generation circuit 15 generates a command indicating that an AC power outage has occurred, and outputs it to the transmitting/receiving circuit 13.

[0039] Then, the carrier signal is modulated in the transmitting/receiving circuit 13 and transmitted from the antenna 14 to the handset 20 side.

[0040] In the handset 20, this transmitted radio wave is transmitted to the antenna 2.
1, the command is received by the transmitting/receiving circuit 22, demodulated into the original command, and sent to the AC power failure signal detection circuit 26. Based on this command, the AC power outage signal detection circuit 26 generates a notification sound to notify that an AC power outage has occurred, and outputs this to the receiver 25.

[0041] As a result, the user who is talking to an outside line on the handset 20 can know that an AC power outage has occurred by hearing the notification sound that is output mixed with the voice of the call. .

In the above embodiment, the AC power outage signal detection circuit 26 of the handset 20 generates a notification sound based on the command sent from the base unit 10, and outputs it to the receiver 25. However, AC power failure signal detection circuit 26
It is possible to connect a display device (not shown) such as an LED or LCD to the main unit 10, and have this display device display an indication that there is an AC power outage based on a command sent from the base unit 10. . The display at this time is, for example, a text display such as "Power outage in progress" or a lighting (or flashing) lamp indicating a power outage.

Further, in the above embodiment, the AC power outage signal generating circuit 15 is configured to generate a command indicating an AC power outage, but the AC power outage signal generating circuit 15 generates an AC power outage instead of the command. It is also possible to generate a notification sound to notify the user of the situation, and to send it to the handset 20 side together with the audio signal sent from the other party's terminal. In this case, the AC power failure signal detection circuit 26 on the slave unit 20 side becomes unnecessary.

[0044]

Effects of the Invention The cordless telephone of the present invention is configured to notify the user of the slave unit of the AC power outage when the AC power of the base unit is cut off during a call, so that the user can
This has the effect that it is possible to immediately know that the C power supply has experienced a power outage, and to perform operations to avoid rapid depletion of the battery inside the base unit due to subsequent long-term phone calls.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of a cordless telephone according to the present invention.

[Explanation of symbols]

1　Telephone line 3 AC power supply 10 Base unit 11 Hook switch 12 Speech network circuit 13 Transmission/reception circuit 15 AC power outage signal generation circuit 16 Control circuit 17 AC power failure detection circuit 18 Battery 20 Child machine 22 Transmission/reception circuit 23 Control circuit 24 Transmitter 25　Telephone receiver 26 AC power outage signal detection circuit 27 Dial circuit

Claims (1)

[Claims] [Claim 1] Connected to a telephone line and connected to an AC
A cordless telephone consists of a base unit that uses a power source for calls and control and is configured to be backed up by an internal battery in the event of an AC power outage, and a slave unit that is connected to the base unit via a wireless line. The master device includes an AC power outage detection means for detecting an AC power outage when an AC power outage occurs, and a power outage that outputs power outage information to the slave device when the AC power outage detection means detects an AC power outage. information output means, and the cordless telephone is equipped with a power outage occurrence notification means for notifying a user of the occurrence of a power outage based on power outage information sent from the power outage information output means. .