JPS63119333A - Cordless speaking device - Google Patents

Abstract

PURPOSE:To obtain an inexpensive desk cordless speaking device by providing a mobile part with an AC plug, through which the mobile part is connected to an external AC power source, and a constant voltage circuit. CONSTITUTION:A telephone set 2 is provided with an AC plug 11, through which the telephone set 2 is connected to the external AC power source, and the constant voltage circuit which converts the voltage of the AC power source to a constant voltage and sends it to a circuit, and the telephone set 2 is connected to an AC receptacle and is used in the range where the rado wave transmitted from a fixed connector 1 can reach the telephone set 2. Because of the AC power source type, it is unnecessary to return the telephone set to the fixed connector 1 or the like as the fixed part for the purpose of charging the telephone set after the end of speaking, and consequently, the installation place of the fixed connector can be freely selected. Since the enclosure is made slightly larger than that of a hand-held type telephone set and the telephone set 2 is used on a desk, it consists of inexpensive standard parts without using expensive micro parts and a device is inexpensive as the whole, and a ringing tone is emitted loudly.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a wireless communication device used in a relatively narrow range, and particularly relates to a fixed connection device connected to a public telephone line, etc., and the fixed connection device. The present invention relates to a cordless communication device comprising a mobile layer telephone and a mobile layer telephone that transmits and receives signals wirelessly.

[Technical Background of the Invention] Conventionally, as shown in FIG. 4, this type of communication device includes a fixed connection device 101 that is connected to lines such as a public telephone line and a doorbell line, and a fixed connection device 101 that is detached from the fixed connection device 101 and connected to a wireless communication device. and a mobile layer telephone 102 used in the mobile phone 102, each having a circuit configuration as shown in FIG.

In such a configuration, when a call is made from the public telephone line 103 or the intercom line 104.

The information is sent to the control unit 106 via the interface circuit 105 of the fixed connection device 101.

The control unit 106 sends the corresponding incoming call signal to the transmission unit 107, modulates it, and sends it out as a radio wave from the antenna. When this radio wave arrives at the receiving section 109 of the mobile layer telephone 102,
After demodulating, the receiving section 109 sends the incoming call signal to the control section 110, which decodes the signal, generates a corresponding ring tone, and causes the ring tone generation speaker to generate the ring tone. This allows the phone 102 to be fixed in the connection bag @101
After picking up the phone and pressing the book up switch 112 to answer and make a call, press the hook down switch 112 to end the call, then return the phone 102 to the fixed connection device 12101 and remove its rechargeable battery. 1
Charge to 14. When making an outside call.

Pick up the telephone 102 from the fixed connection device 1101, press the hook-up switch 112, and then press the channel selection button 11.
Press 3 and when the other party's station comes up, make a call.

After the call ends, press the hook down switch 1 in the same way as when the first call arrives.
Press 12 to return the telephone 102. Since the conventional cordless telephone device has the above-described configuration, in order to charge the telephone 102, the telephone 102 must be returned to the fixed connection device 101. For this reason, the fixed connection device 101 has to be installed at a different location. It was restricted. In addition, since the telephone is a hand belt type and compact, it requires expensive super-heavy parts, which increases the cost of the entire device.

Furthermore, small rechargeable telephones cannot use power amplifiers or large speakers that consume a large amount of current, so they have the disadvantage that they cannot generate special ring tones such as chimes or loud ring tones.

[Object of the Invention] The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and it is an object of the present invention to provide an inexpensive desk-top type cordless telephone device that can be used with an AC power source.

[Summary of the Invention] In order to achieve the above object, the cordless telephone device of the present invention is a cordless telephone device comprising a fixed part connected to one line and a mobile part connected to the fixed part by a wireless line. , the moving part is characterized in that it is equipped with an AC plug connected to an external AC power source and a constant voltage circuit, and further, the moving part amplifies a ringing tone signal and a voice signal generated by the signal from the fixed part. It is characterized by having an amplifier and a speaker connected to the amplifier.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

Figure 1(a) shows the fixed connection bag @1, which is the fixed part, and Figure 1(a).
b) is a diagram illustrating the external appearance of the telephone 2, which is a mobile unit.

Fixed connection device 1 connects to public telephone circuit 3. It is connected to the line of the door intercom handset 3', etc., and can be installed at any location in the room. Phone 2 has a 10 keypad 4. on its panel. Hook switch 5. It is equipped with a speaker 6, a microphone 7, a volume changeover switch 8, a doorbell display lamp 9, a call-in-progress display lamp 1O, and an AC plug 11 for connection to an external AC power source.

The AC plug 11 can be stored in a storage section 12 provided in a part of the housing. Furthermore, a handle 13 is provided on the side of the telephone 2 to make it easier to carry. The telephone 2 is used by being connected to an AC outlet within the reach of radio waves emitted from the fixed connection device 1. As shown in FIG. 2, the circuit configuration of the telephone 2 mainly includes a receiving section 20. which receives radio waves from the fixed connection device 1. The sound from the microphone 7 is sent as a radio wave to the fixed connection device 1 by a transmitting section 21 and a synthesizer section 2.
3. Control unit 24. It consists of a ringing tone generation circuit 25 and a constant voltage circuit 26 that converts the voltage of an external AC power source into a constant voltage and sends it to the circuit.

The receiving section 20 includes a high frequency amplification circuit 27 and a frequency mixing circuit 28
, a detection circuit 29, and a power amplifier 30. The power amplifier 30 is an amplifier that amplifies the ringing tone signal and voice signal generated by the signal from the fixed connection device 1, and is connected to the speaker 6 via the volume changeover switch 31. The speaker 6 is generally larger than a speaker used in a receiver.

Next, the operation of the cordless telephone device configured as described above will be explained. The operation of the fixed connection device 1 is the same as the conventional one, so a description thereof will be omitted.

First, when a radio wave modulated with an incoming call signal is sent from the fixed connection device 1, it is converted into an electrical signal by the receiving antenna 32, amplified by the high frequency amplification circuit 27 of the receiving section 20, and then synthesized by the frequency mixing circuit 28. The intermediate frequency signal is mixed with the local oscillation signal from the section 23 and sent to the detection circuit 29, where the original signal is demodulated. When this signal is input to the control unit 24, the control unit 24 decodes it, outputs a predetermined output, operates the ringing tone generation circuit 25, generates a corresponding ringing signal, and also issues a call from the doorbell. If so, the doorbell display lamp 9 is turned on. After the ringing tone signal is amplified by the power amplifier 30, the volume changeover switch 31 (8) adjusts the volume to a required sound level, and the speaker 6 outputs the signal as a ringing tone.

As a result, when the hook switch (up) 5 of the telephone 2 is pressed, an answer and a call can be made. At this time.

The call indicator lamp 10 lights up. During a call, the detection circuit 29
The demodulated audio signal passes through the power amplifier 30, the volume adjustment switch 31 (8), and is output from the speaker 6, and if you are near the mobile phone 2, you can hear the voice from the other party.

In this embodiment, the mobile phone 2 is powered by an external A.
ct! Although only the AC power source is used, by providing a power backup battery 33 as shown in Fig. 3, the AC plug 1
1 can be used even when it is disconnected from the AC outlet.

[Effects of the Invention] As is clear from the above embodiments, in the present invention, since the mobile phone, which is a mobile part, is an AC power type, after the end of a call, the fixed connection device, which is a fixed part, etc. is used for charging. There is no need to return the phone to the factory, and the user is therefore free to choose the location for installing the fixed connection device. In addition, the casing was slightly larger than conventional hand belt type telephones, allowing it to be used on a desktop.

It can be constructed from inexpensive standard parts without using expensive ultra-small parts, making the entire device inexpensive.

Furthermore, since it is AC powered, there is plenty of power capacity, and it can also produce special ring tones such as chimes.
Also, the ringtone can be made louder.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are diagrams showing the external appearance of the cordless telephone device, Figure 2 is a circuit diagram of the moving unit, Figure 3 is another embodiment of the moving unit, and Figure 4 is a conventional cordless communication device. FIG. 5 is a circuit diagram of the communication device. 1...Fixed connection device! (Fixed part) 2.
......Mobile telephone (mobile part) 3.3'.
...Line 6...Speaker 8...Volume selector switch 11...
AC plug 20...Receiving section 21...Transmitting section 23...Synthesizer section 24...Control section 25...Ring tone generation circuit 30...Power amplifier (amplifier) agent
Patent Attorney Moritani -O Figure 2 L-, -+ -++ -1 ++++++ -J Figure 3 Figure 4 Figure 5 Patent Application No. 169168/1988 2, Name of Invention Cordless Telecom Device 3, Amendments Patent applicant Aiphone Co., Ltd. 4. Date of amendment order September 30, 1985 (shipment date) 5. Agent 〒103 6. Engraving of the drawing to be amended I. Written amendment to the patent procedure (, f, December 18, 1988

Claims (1)

[Claims] 1. A cordless communication device comprising a fixed part connected to a line and a moving part connected to the fixed part by a wireless line, wherein the moving part has an AC plug connected to an external AC power source. A cordless telephone device characterized by comprising: and a constant voltage circuit. 2. The movable part has an amplifier for amplifying a ringing tone signal and a voice signal generated by the signal from the fixed part, and a speaker connected to the amplifier. Cordless communication device.