JPH04223639A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To enable calling between a master device and a slave device even when the slave device is mounted on a charger. CONSTITUTION:A charger 5 is equipped with a speaker 53, microphone 54, incoming signal detection circuit 56, and automatic response circuit 57, and both the slave device and the charger 5 are equipped with communication terminals (A5, B5, and D5) for mutually transferring signals. An incoming call from the master device is detected through the incoming signal detection circuit 56 by the automatic response circuit 57, so that the signal is transmitted through the response signal output terminal D5 and the slave device to the master device side. And also, a voice signal from the master device is outputted through the slave device and the received signal input terminal A5 to the speaker 53, and a voice input from the microphone 54 is transmitted through the transmitted signal output terminal B5 and the slave device to the master device side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone, and more particularly, to a cordless telephone that allows a telephone call to be made between a base unit and a base unit even when the slave unit is placed on a charger.

0002

2. Description of the Related Art Cordless telephones have recently become widespread and are now widely used. Cordless telephones eliminate cords that are complicated to handle, and are much more convenient than conventional telephones. However, since the cordless handset is cordless, it is necessary to store a power source within itself, and generally it has a built-in storage battery that eliminates the hassle of battery replacement. Therefore, when the handset is not in use, it is necessary to constantly charge the storage battery by placing it on a charger.

0003

[Problem to be Solved by the Invention] By the way, when a call comes in while the handset is being charged, it is difficult to remove the handset from the charger even if the user is busy doing other work and cannot take his hands off the phone. There was a glitch where the phone could not be answered unless the phone was picked up and answered, causing work to be interrupted.

[0004] The present invention was made in view of the above circumstances, and its purpose is to automatically answer and make a call without taking the handset from the charger when a call comes in while the handset is being charged. Our goal is to provide cordless telephones with a wide range of features.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the cordless telephone of the present invention outputs received signals such as data signals and audio signals sent from the base unit to the charger side. a reception signal output terminal for receiving a transmission signal such as an audio signal sent from the charger, a transmission signal input terminal for receiving a transmission signal such as an audio signal sent from the charger, and a response signal for receiving an automatic response signal sent from the charger. an input terminal, the charger is provided with a reception signal input terminal in contact with the reception signal output terminal, a transmission signal output terminal in contact with the transmission signal input terminal, and a response signal output in contact with the response signal input terminal. a hands-free circuit connected to the received signal input terminal and the transmitted signal output terminal, a microphone and a speaker connected to the hands-free circuit, and an incoming signal detection circuit connected to the received signal input terminal. , an automatic response circuit to which the output of the incoming signal detection circuit is connected and also connected to the response signal output terminal,
When the handset is placed on the charger, the automatic response circuit automatically answers incoming calls from the base unit, and the microphone and speaker provided on the charger allow communication between the slave unit and the base unit. It is configured so that it is possible to make phone calls.

[0006]

[Operation] When the handset is placed on the charger, the reception signal output terminal on the handset side, the reception signal input terminal on the charger side, the transmission signal input terminal on the handset side and the transmission signal output terminal on the charger side, The response signal input terminal on the device side and the response signal output terminal on the charger side are in contact with each other. As a result, the incoming call signal sent from the base unit to the handset via radio waves is guided to the incoming call detection circuit via the receive signal output terminal on the handset side and the receive signal input terminal on the charger side, and the incoming call detection signal is You will be guided by an automatic response circuit. As a result, a response signal is output from the automatic response circuit, and this response signal is transmitted to the base unit via the response signal output terminal on the charger side and the response signal input terminal on the slave unit side. In addition, when a communication path is established between the base unit and the handset by this automatic response signal, the audio signal from the base unit is transmitted through the reception signal output terminal on the handset side and the reception signal input terminal on the charger side. is guided through the hands-free circuit, and the sound is emitted from the built-in speaker. Also,
The audio signal input from the microphone built into the charger is
The signal is guided to the high-speed free circuit and transmitted to the base unit via the transmission signal output terminal on the charger side and the transmission signal input terminal on the slave unit side. In this way, it is possible to talk to the base unit while leaving the slave unit on the charger.

[0007]

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

FIG. 1 shows a base unit 1 of a cordless telephone according to the present invention.
2 is a block diagram showing the electrical configuration of the handset 3, and FIG. 3 is a block diagram showing the electrical configuration of the charger 5.

In FIG. 1, an antenna 11 of a base unit 1 is connected to an output of a transmitting circuit 12 and an input of a receiving circuit 13. Further, the output of the frequency synthesizer 14 to which the control signal from the control circuit 15 is guided is guided to the receiving circuit 13 . The receiving circuit 13 receives 250M from the handset 3.
It receives a radio signal in the Hz band and demodulates it into an audio signal and a data signal. and,
One output of the receiving circuit 13 is guided as an audio signal to the speaker 17 via the amplifier 16, and the other output of the receiving circuit 13 is guided as a data signal to the control circuit 15.
guided by. The transmitting circuit 12 also includes a microphone 18.
The output of the frequency synthesizer 14 and the output of the control circuit 15 are also guided. The transmitting circuit 12 modulates the audio signal from the microphone 18 and the data signal from the control circuit 15 into a 380 MHz band wireless signal, amplifies it to a required transmission power level, and sends it to the antenna 11. There is. In addition, the control circuit 15
The configuration is such that the output of the intercom call button 19 is guided.

In FIG. 2, an antenna 31 of the handset 3 is connected to an output of a transmitting circuit 32 and an input of a receiving circuit 33. Further, the output of the frequency synthesizer 34 to which the control signal from the control circuit 35 is guided is guided to the receiving circuit 33 . The receiving circuit 33 receives 380M from the base unit 1.
It receives a radio signal in the Hz band and demodulates it into an audio signal and a data signal. and,
One output of the receiving circuit 33 is led to an amplifier 36, where it is amplified to a required level, and then led to a speaker 37 and a received signal output terminal A3. In addition, the receiving circuit 3
The other output of 3 is led to the control circuit 35 as a data signal. The transmission circuit 32 also includes a changeover switch 3.
9 movable contacts c are connected, and the output of the frequency synthesizer 34 and the output of the control circuit 35 are guided. Further, the output of the microphone 38 is connected to one fixed contact a of the changeover switch 39, and the transmission signal input terminal B3 is connected to the other fixed terminal b. When the movable terminal c of the changeover switch 39 is connected to the fixed terminal a side, the transmission circuit 32 modulates the audio signal from the microphone 38 and the data signal from the control circuit 35 into a 250 MHz band wireless signal, The signal is amplified to a required transmission power level and sent to the antenna 31. Further, the transmitting circuit 32 has a movable terminal c of the changeover switch 39.
is connected to the fixed terminal b side, the audio signal from the charger 5 and the data signal from the control circuit 35, which will be described later, are modulated into a 250 MHz band wireless signal and amplified to the required transmission power level. , is transmitted to the antenna 31. The control circuit 35 is also connected to a response signal input terminal D3. In addition to the above-described received signal output terminal A3, transmitted signal input terminal B3, and response signal input terminal D3, the slave unit 3 has a ground terminal C3 set to ground potential, and is connected to a charging circuit on the slave side (not shown). Charging terminals E3 and F3 are provided.

In FIG. 3, the charger 5 has a reception signal input terminal A5 and a transmission signal output terminal B corresponding to each terminal A3, B3, C3, D3, E3, F3 provided on the slave unit 3.
5, a ground terminal C5, a response signal output terminal D5, and charging terminals E5 and F5 are provided. The received signal input terminal A5 is connected to the hands-free circuit 51 and the incoming signal detection circuit 5.
6, and the transmission signal output terminal B5 is connected to the hands-free circuit 51. Further, the input of a speaker 53 is connected to the hands-free circuit 51 via a speaker amplifier 52, and the output of a microphone 54 is connected via a microphone amplifier 55. Further, the output of the incoming signal detection circuit 56 is led to an automatic response circuit 57, and the output of the automatic response circuit 57 is connected to the hands-free circuit 51 and the response signal output terminal D5. The automatic answering circuit 57 includes an output of an automatic answering on/off switch 58 for automatically answering the call when receiving the incoming call detection signal from the incoming call signal detecting circuit 56, and an output terminal for ending the call by the hands-free circuit 51. The output of the talk switch 59 is also guided. Further, a charging circuit 60 for charging a storage battery (not shown) of the handset 3 is connected to the charging terminals E5 and F5.

FIG. 4 shows the appearance of the handset 3 and charger 5, and each terminal A3, B3, C3, D3, E3,
F3 is provided at the bottom when the handset 3 is placed on the charger 5, and is connected to each terminal A5, B5, C5, D5 of the charger 5.
, E5, and F5 are provided at corresponding positions on the slave device mounting section 5a. That is, each terminal comes into contact with each other only when the handset 3 is placed on the charger 5.

Next, the operation of the cordless telephone with the above configuration will be explained. When the intercom call button 19 of the base unit 1 is pressed while the slave unit 3 is placed on the charger 5, this ON signal is given to the control circuit 15. The control circuit 15 sends a calling signal based on this ON signal to the transmitting circuit 12, FM-modulates it into a 380 MHz band radio signal, amplifies it to a required power level, and transmits it from the antenna 11.

In the handset 3, the radio signal transmitted from the base unit 1 is received by the receiving circuit 33 via the antenna 31, where it is FM demodulated into the original calling signal and sent to the control circuit 35. . The control circuit 35 recognizes the calling state by receiving this calling signal. The demodulated calling signal is output as sound from the speaker 37 via the amplifier 36, and is also input to the incoming call detection circuit 56 via the received signal output terminal A3 and the received signal input terminal A5. The incoming signal detection circuit 56 detects this calling signal and sends an incoming call detection signal to the automatic response circuit 57. Here, if the automatic response on/off switch 58 of the automatic response circuit 57 is on, the automatic response circuit 57
Based on this incoming call detection signal, a response signal is sent to the control circuit 35 of the handset 3 via the response signal output terminal D5 and the response signal input terminal D3. Further, an activation signal is output to the hands-free circuit 51 to put the hands-free circuit 51 into an operating state.

The control circuit 35 sends this response signal to the transmitting circuit 32, FM-modulates it into a 250 MHz band radio signal, amplifies it to a required power level, and transmits it from the antenna 31. Furthermore, upon receiving this response signal, the control circuit 35 sets a predetermined communication channel.

In the base unit 1 , the radio signal transmitted from the slave unit 3 is received by the receiving circuit 13 via the antenna 11 , where it is demodulated into the original response signal and sent to the control circuit 35 . Upon receiving this response signal, the control circuit 35 sets a predetermined communication channel. Thereby, a communication path is formed between base unit 1 and handset 3.

In this state, the connection of the selector switch 39 of the handset 3 is switched to the fixed terminal b side. Thereby, the audio signal sent from the base unit 1 is transmitted to the antenna 31 of the slave unit 3, the receiving circuit 33, the amplifier 36, the received signal output terminal A3, the received signal input terminal A5, the hands-free circuit 51,
The audio signal emitted from the speaker 53 via the speaker amplifier 52 and input from the microphone 54 of the charger 5 is transmitted to the microphone amplifier 55, the hands-free circuit 51, the transmission signal output terminal B5, the transmission signal input terminal B3, and the changeover switch. 39 to the transmitting circuit 32, where it is FM modulated into a 250 MHz band radio signal, amplified to a required power level, and transmitted from the antenna 31 to the base unit 1 side. In this way, hands-free communication is possible between the microphone 54 and speaker 53 of the charger 5 on which the slave unit 3 is placed and the base unit 1.

Thereafter, when the end call switch 59 of the charger 5 is pressed during a call, this ON signal is detected by the automatic response circuit 57, and the hands-free circuit 51 and the control circuit 35 of the handset 3 are notified of the call. Sends a signal indicating termination. As a result, the hands-free circuit 51 stops operating, and the control circuit 35 also stops the operation of the handset 3.

[0019]

[Effects of the Invention] When the handset is placed on the charger, the cordless telephone of the present invention automatically answers incoming calls from the base unit using the automatic answering circuit, and also uses the microphone and speaker provided on the charger. Since the device is configured so that a call can be made between the handset and the base unit, when a call comes in while the handset is being charged, the call can be made without having to pick up the handset. As a result, even if the user is busy doing other work and cannot take his hands off the phone, he can make a call without interrupting his work.

[Brief explanation of the drawing]

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

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

FIG. 3 is a block diagram showing the electrical configuration of the cordless phone charger of the present invention.

FIG. 4 is an external view of the handset and charger of the cordless telephone of the present invention.

[Explanation of symbols]

1 Base unit 3. Handset 5 Charger A3 Received signal output terminal A5 Receive signal input terminal B3 Transmission signal input terminal B5 Transmission signal output terminal D3 Response signal input terminal D5 Response signal output terminal 51 Hands-free circuit 53 Speaker 54 Microphone 56 Incoming signal detection circuit 57 Automatic response circuit

Claims (1)

[Claims] Claim 1. A cordless telephone comprising a base unit, a slave unit connected to the base unit via a wireless line, and a charger for charging a storage battery built in the slave unit, wherein the slave unit includes: A reception signal output terminal for outputting reception signals such as data signals and audio signals sent from the base unit to the charger side, and a reception signal output terminal for receiving transmission signals such as audio signals sent from the charger. a transmission signal input terminal, and a response signal input terminal for receiving an automatic response signal sent from the charger, and the charger has a reception signal input terminal in contact with the reception signal output terminal; a transmission signal output terminal in contact with the transmission signal input terminal; a response signal output terminal in contact with the response signal input terminal; a hands-free circuit connected to the reception signal input terminal and the transmission signal output terminal; A microphone and a speaker connected to the free circuit, an incoming signal detection circuit connected to the received signal input terminal, and an automatic response circuit to which the output of the incoming signal detection circuit is connected and also connected to the response signal output terminal. and when the handset is placed on the charger, the automatic answering circuit automatically answers an incoming call from the base phone, and the microphone and speaker provided on the charger automatically answer the call from the base phone. A cordless telephone characterized in that it is configured to be able to make a call between it and a base unit.