JP2815518B2 - Cordless telephone - Google Patents

Abstract

PURPOSE:To inform the corresponding relation of a slave machine and a cradle. CONSTITUTION:A cradle call key 17 and a cradle call means 15 are provided on a slave machine, and when the cradle call key 17 is operated, a cradle call signal is transmitted from a slave machine part communication means 11. Also, on a cradle, a cradle part communication means, a slave machine call key and a slave machine call means for executing a radio connection to the slave machine part communication means are provided, and when the cradle part communication means receives the cradle cable call signal, a ring-back tone is generated, and when the slave machine call key is operated, the slave machine call signal is transmitted from a cradle part communication means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone which generates a ringing tone from a cradle by operating a slave unit and generates a ringing tone from a slave unit by operating the cradle.

[0002]

2. Description of the Related Art A cordless telephone which can be used at an arbitrary position within a radio wave reachable range is characterized by having no connection cable. Although possible, this creates a new problem of forgetting where to place the handset.

A cordless telephone for solving this problem has been conventionally proposed in Japanese Patent Application Laid-Open No. 1-195744, the outline of which is described below.

This cordless telephone transmits / receives a voice signal of a telephone line using radio waves, and an operation button for calling a child device is provided to a parent device which transmits a radio call signal in response to an incoming call from the telephone line. Is provided. Then, when the operation button is operated, a radio calling signal is transmitted.

[0005] With the above configuration, when the place where the child device is placed is not known, the radio signal is transmitted from the parent device by operating the operation button. As a result, the radio paging signal is received by the handset, and the handset emits a ringing sound, and this ringing sound acts to indicate the location of the handset.

[0006]

At present, since cordless telephones are widely used, there are many cases where a plurality of slave units are used at the same place, and each of these slave units has A cradle corresponding to is provided. When the above-described device is applied in such a use state, the following problem occurs.

[0007] That is, the correspondence between the slave unit and the cradle is one-to-one, and when the slave unit and the cradle are combined out of the correspondence relationship, the shape of the cradle and the shape of the slave unit are different. Therefore, the position of the charging terminal provided on the cradle does not match the position of the child device, and the child device is not charged. Therefore, the function of the child device is stopped by discharging the battery. If the charging voltages do not match, a failure occurs in the slave unit or the cradle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a cordless telephone capable of notifying the correspondence between a slave unit and a cradle.

[0009]

In order to solve the above-mentioned problems, a cordless telephone according to the present invention comprises a slave unit communication means for making a wireless connection with a master unit, and a slave unit communication signal is transmitted to the slave unit communication means. The present invention is applied to a cordless telephone including a handset that generates a ringing tone when received by the mobile phone and a cradle that charges the handset when the handset is placed in a predetermined position. A call key, and cradle calling means for transmitting a cradle calling signal, which is a signal for calling the cradle, from the slave unit communication means when the cradle calling key is operated. The cradle unit communication means for making the connection, the slave unit calling key, and when the slave unit calling key is operated, the slave unit calling signal is transmitted from the cradle unit communication unit. And the slave device calling means, when the cradle ringing signal is received by the cradle unit communication means,
A ring tone generating means for generating a ring tone from the cradle.

[0010]

The cradle calling means provided in the slave unit causes the slave unit communication means to transmit a cradle calling signal which is a signal for calling the cradle when the cradle calling key is operated. Therefore, the cradle generates a ringing tone when the cradle calling signal is received by the cradle unit communication means.

The handset calling means causes the cradle communication means to transmit a handset calling signal when the handset calling key is operated. For this reason, on the side of the handset, when the handset calling signal is received by the handset communication means, a calling sound is generated by the calling sound generating means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cordless telephone according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of a child device according to an embodiment of the present invention.

In the figure, an R to which an antenna 22 is connected is shown.
The F modulation / demodulation unit 12 is bidirectionally connected to the signal processing unit 13, and the control unit 1
4 is also a bidirectional connection. The output from the key switch 16 is given to the control means 14.

The audio signal sent from the signal processing unit 13 is sent to the speaker 20 via the amplifier 18, and the audio signal sent from the microphone 21 is sent to the amplifier 19.
Is introduced into the signal processing unit 13 via the.

The details of the configuration of each block will be described below.

The RF modulation / demodulation unit 12 receives a radio wave captured by the antenna 22 to extract an audio band signal, and sends the extracted audio band signal to the signal processing unit 13. The audio band signal transmitted from the signal processing unit 13 is a block for transmitting a high frequency signal modulated by the audio band signal from the antenna 22 as a radio wave.

The signal processing unit 13 includes an RF modulation / demodulation unit 12.
If the signal is a signal indicating data, the signal is converted to a digital signal and sent to the control means 14, and if the signal is a sound signal, the signal is transmitted through an amplifier 18 via the amplifier 18. A digital signal sent from the control means 14 to an audio band signal, which is sent to the RF modulation / demodulation unit 12, and which is guided via the amplifier 19 from the microphone 21. Is transmitted to the RF modulation / demodulation unit 12.

The key switch 16 is provided on a panel portion of the main unit, and is composed of a group of a plurality of switches such as numeric keys used for inputting a dial number.
The block includes a cradle call key 17 which is a switch for calling the cradle.

The control means 14 is constituted mainly by software executed by a microcomputer, and generates a digital signal indicating a dial number in accordance with an output from the key switch 16 and converts the digital signal into data from the signal processing section 13. The control operation and the ringing sound indicating that there is a call are sent to the amplifier 18 via the signal processing unit 13.

The cradle calling means 15 is a block formed inside the control means 14. When the cradle calling key 17 is operated, a cradle calling signal for calling the cradle is processed by a signal processing. The antenna 22 via the unit 13 and the RF modulation / demodulation unit 12
It is a block to be transmitted more.

In the above configuration, the slave unit communication means 1
Reference numeral 1 denotes a configuration including two blocks of an RF modulation / demodulation unit 12 and a signal processing unit 13.

FIG. 2 is a block diagram showing an electrical configuration of an embodiment of the cradle according to the present invention.

In the figure, an R to which an antenna 41 is connected is shown.
The F modulation / demodulation unit 32 is bidirectionally connected to the signal processing unit 33, and the control unit 3
4 is also a bidirectional connection. The output of the child unit call key 36 is given to the control means 34.

The audio signal transmitted from the signal processing unit 33 is transmitted to a speaker (ringing sound generating means) 38 via an amplifier 37, and an output from the control means 34 is guided to a charging circuit 39. I have. And AC adapter 4
The power output of 0 is given to the block indicated by the broken line 42 and the charging circuit 39.

Next, the configuration of each block will be described in detail.

The RF modulation / demodulation unit 32 receives a signal guided to the antenna 41 to extract an audio band signal, and sends the extracted audio band signal to the signal processing unit 33. The audio band signal transmitted from the signal processing unit 33 is a block for transmitting a signal modulated according to the audio band signal from the antenna 41 as a radio wave.

The signal processing unit 33 includes an RF modulation / demodulation unit 32.
This is a block that converts the audio band signal output from the control unit into a digital signal and sends it to the control unit 34, and converts the digital signal sent from the control unit 34 into an audio band signal and sends it to the RF modem 32. I have.

The handset call key 36 is a switch operated when calling the handset, and is provided on the upper surface of the cradle main body. The charging circuit 39 is a block that charges a battery inside the slave unit by supplying a charging current to a charging terminal when the slave unit is placed at a predetermined position.

The control means 34 includes a control signal processing unit 33
When a digital signal indicating a call is derived from,
A signal for a ringing tone is generated and a charging circuit 39 is generated.
Is a block for controlling the charging operation.

The sub unit calling unit 35, which is a block provided inside the control unit 34, is a block for generating a signal for calling the sub unit in response to the operation of the sub unit calling key 36. The RF modulation / demodulation unit 3 via the processing unit 33
2 is a block for transmitting a signal modulated by the signal generated in 2 from the antenna 41 as a handset calling signal.

The AC adapter 40 serves as a power supply circuit for supplying a direct current of several volts to the charging circuit 39 and the block 42 by transforming and rectifying the commercial power.

In the above configuration, the cradle unit communication means 31 is composed of the RF modulation / demodulation unit 32 and the signal processing unit 33.
It consists of three blocks.

The operation of one embodiment of the present invention having the above configuration will be described below.

The method of wireless connection between the master unit and the slave unit is the same as that of the prior art, and the RF modulation / demodulation unit 12, the signal processing unit 1
3 and the control means 14 are used to transmit and receive data corresponding to the respective procedures of sending and receiving.

The voice signal from the telephone line connected according to the above procedure is guided to the amplifier 18 via the master unit, the RF modulation / demodulation unit 12 and the signal processing unit 13, and
The sound is transmitted from the speaker 20 as sound. Also microphone 2
1 is supplied to an amplifier 19, a signal processing unit 13,
The data is transmitted to the parent device via the F modem unit 12 and transmitted to the telephone line.

Next, the operation when the cradle is called from the slave unit will be described.

When an operation start instruction is given to the cradle calling means 15 by operating the cradle calling key 17, the cradle calling means 15 generates a digital signal set in advance to call the cradle, and generates the generated digital signal. The signal is sent to the signal processing unit 13.

The signal processing unit 13 includes a cradle calling unit 1
After converting the digital signal transmitted from 5 into a voice band signal, the signal is transmitted to the RF modulator / demodulator 12. RF modem 12
Transmits a high-frequency signal modulated according to this signal to the antenna 2
Output to 2.

Therefore, a cradle calling signal, which is a signal corresponding to the digital signal generated by the cradle calling means 15 and is a signal for calling the cradle, is:
It is transmitted from the antenna 22 as a radio wave.

On the other hand, on the cradle side, a cradle calling signal from the slave unit is received by the RF modulation / demodulation unit 32, and the received signal is converted into a digital signal by the signal processing unit 33 and then transmitted to the control means 34. You.

The control means 34 determines that the cradle is being called because the signal sent from the signal processing section 33 is a signal indicating calling, and generates a ringing tone signal. This ringing tone signal is sent to the amplifier 37 via the signal processing unit 33. Therefore, the amplifier 37 amplifies the ringing signal and outputs it to the speaker 38,
To generate a ring tone.

Next, the operation for calling a slave unit from the cradle will be described.

When the operation of the handset calling means 35 is started by operating the handset calling key 36, the handset calling means 35 generates a digital signal preset for calling the handset, The generated digital signal is sent to the signal processing unit 33.

The signal processing unit 33 converts the digital signal from the handset calling unit 35 into a voice band signal, and then sends it to the RF modulation / demodulation unit 32. For this reason, the RF modulation / demodulation unit 32 uses a high-frequency signal modulated according to this signal as a handset calling signal (this handset calling signal is the same as the handset calling signal used when the base unit calls the handset) through the antenna. Transmit from 41.

On the other hand, on the handset side, the handset calling signal from the cradle is received by the RF modulation / demodulation unit 12, and the received signal is converted into a digital signal by the signal processing unit 13 and then given to the control unit 14. Can be

The control means 14 interprets this digital signal and determines that it is a call for a slave unit. Then, according to the result of the determination, a ringing tone signal is transmitted to the amplifier 18 via the signal processing unit 13. This ringing signal is output to the amplifier 18.
After being amplified by the speaker 20, the ringing tone is emitted from the speaker 20.

The charging circuit 39 provided in the cradle
The DC current supplied from the AC adapter 40 is supplied to the battery of the slave unit located at a predetermined position, and when the control unit 34 instructs to stop charging, the supply of the DC current to the battery is stopped. An operation is performed (this operation is the same as the prior art).

It should be noted that the present invention is not limited to the above-described embodiment, and the case where the signal applied to the speaker 38 is only a signal indicating a ringing tone has been described. The signal is guided to the amplifier 37 via the signal processing unit 13, the RF modulation / demodulation unit 12, the RF modulation / demodulation unit 32, and the signal processing unit 33, so that the sound from the slave unit is transmitted from the speaker 38. It is possible.

[0049]

According to the cordless telephone of the present invention, a cradle calling key and a cradle calling means are provided in the slave unit, and when the cradle calling key is operated, a cradle calling signal for calling the cradle is transmitted to the slave unit communication means. More. Further, the cradle is provided with a cradle communication means for making a wireless connection with the slave communication means, a handset call key and a handset calling means, and generates a ringing tone when the cradle communication means receives a cradle calling signal. When the handset calling key is operated, the handset calling signal is transmitted from the cradle communication means. When the cradle calling key is operated, a ringing sound is generated from the cradle and the handset calling key is operated. When this is done, a ringing tone is generated from the child device, so that the correspondence between the child device and the cradle can be notified.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing an electrical configuration of an embodiment of the cradle of the cordless telephone according to the present invention.

[Explanation of symbols]

 11 Slave Unit Communication Means 15 Cradle Calling Means 17 Cradle Call Key 31 Cradle Communication Means 35 Slave Calling Means 36 Slave Call Key 38 Speaker

Claims (1)

(57) [Claims] 1. A slave unit, comprising: a slave unit communication unit for making a wireless connection with a master unit, wherein a slave unit generates a ring tone when a slave unit call signal is received by the slave unit communication unit; When the handset is placed in a predetermined position, the cordless telephone includes a cradle for charging the handset. The handset includes a cradle call key, and when the cradle call key is operated, the cradle is operated. Cradle calling means for transmitting a cradle calling signal, which is a calling signal, from the slave unit communication means, the cradle comprising: a cradle unit communication means for making a wireless connection with the slave unit communication means; and a slave calling key. And a slave unit calling means for transmitting the slave unit calling signal from the cradle unit communication means when the slave unit calling key is operated; A cordless telephone comprising: a ringing tone generating unit that generates a ringing tone when the cradle calling signal is received by the dollar communication unit.