KR200194782Y1 - A hands free device for a mobile telephone - Google Patents

Abstract

The present invention transmits the transmission sound to the hands-free microphone, and the reception sound is wirelessly received from the hands-free module for the mobile phone and is generated by a speaker that can be positioned at an arbitrary place. A hands-free device for a wireless telephone, comprising: a hands-free module (40) for detecting a call signal of a mobile wireless telephone (50) and outputting it wirelessly; Cigar jack 10 for connecting the battery of the car and the rechargeable battery of the mobile radio telephone; A charging unit 20 installed in parallel to the cigar jack 10 and supplying charging power; And a wireless speaker unit 30 placed in the charging unit 20 to be connected to the charging connection terminals 43 'and 44' to receive power and to receive and output a wireless signal from the hands free module 40. And the earphones can get rid of the annoyance felt by being in close contact with the ears, and also the power supply to the audio amplifier only during a call can extend the use time even if using a normal battery.

Description

Hands free device for a mobile radio {a hands free device for a mobile telephone}

The present invention relates to a hands-free device for a mobile radio telephone. In particular, a transmission sound is transmitted to the hands-free microphone, and a reception sound is wirelessly received from the hands-free of the mobile radio telephone and generated by a speaker that can be positioned at an arbitrary place. The present invention relates to a hands-free device for a mobile phone, which allows a mobile phone call to be made while making a call.

The conventional hands-free device for a mobile phone allows a hands-free call to be made by transmitting / receiving a mobile phone's transmission / reception signal in a hands-free transmission / reception device composed of an earphone or a headset and a microphone by wire or wireless.

International application WO 97/13332, "Hands-free mobile telephone apparatus", comprising: support means for holding a mobile telephone in a designated position such that its audio transmitter is located adjacent to a hands-free acoustic receiving means; A hands-free device comprising a hands-free sound receiving means coupled with a transmission device for transmitting a transmission signal of the mobile telephone to a sound reproduction system.

Korean Practical Publication Nos. 99-11641 and 99-11642, 'Wireless Hands-Free Presets,' attach a separate wireless transmitting / receiving device to the mobile phone, and attach a hands-free device composed of ear micros to transmit / receive the device. It is starting.

Republic of Korea Utility Publication No. 99-11714 'Wireless Handsfree for Mobile Phones Using FM Radio' is equipped with a separate FM wireless transmitter connected to the mobile phone by wire and receives the incoming sound of the mobile phone through the FM radio installed in the vehicle. Discloses a handsfree device configured for input to a separate wired micro mobile phone.

In Korean Practical Publication No. 99-11715, 'Wireless Hands Free Using Built-in Speaker and FM Radio in Mobile Phone Terminal', the sound of the speaker embedded in the mobile phone is received by a separate external microphone through a waveform shaping and amplification process. A hands-free device for transmitting over FM radio is disclosed.

The conventional hands-free device reproduces a voice signal received by a mobile phone with a wired / wireless earphone or a headset, and transmits a wired / wireless micro voice to the mobile phone. Abnormalities may occur, and the headset may cause stress on the eardrum because it is attached to the head and puts pressure on the head for a long time, and generates sound in close contact with the ear. In addition, since the ear is blocked by a headset or earphone, there is a problem in that it cannot hear a horn or an abnormal sound of an engine room informing the danger generated from the outside, and thus cannot cope with the danger.

In addition, when using a sound reproducing system such as the FM radio of the vehicle, if you operate the tuning buttons stored at the specified frequency, you cannot concentrate on driving while the vehicle is running, and you cannot cope with the risk of accidents. Due to the incoming noise, it was necessary to increase the volume unnecessarily in order to receive the correct sound. If the hands-free device was not turned off, there was a problem that white noise was heard through the sound reproducing system.

The present invention was created to solve the above problems,

It is an object of the present invention to provide a handsfree device for a mobile radiotelephone capable of positioning the handsfree in an arbitrary place in a vehicle interior.

Another object of the present invention is to provide a hands-free device for a mobile wireless telephone, which does not operate when not in communication, thereby saving power and preventing unnecessary noise.

Still another object of the present invention is to provide a hands-free device for a mobile wireless telephone having a charging device that can be charged using electricity of a vehicle.

1 is a block diagram of a hands-free device for a mobile wireless telephone according to an embodiment of the present invention,

FIG. 2 is a block diagram illustrating a configuration of a hands free module of FIG. 1;

3 is a block diagram illustrating a configuration of the wireless speaker unit 30 of FIG. 1.

<Explanation of symbols for the main parts of the drawings>

10: cigar jack 20: charging unit

30: wireless speaker unit 40: hands free module

50: mobile wireless telephone

In order to achieve the above object, a hands-free device for a mobile wireless telephone according to the present invention includes a hands-free module which detects a call signal of a mobile phone and wirelessly outputs it; A cigar jack connecting the battery of the car and the rechargeable battery of the mobile phone; A charging unit installed in parallel to the cigar jack and supplying power for charging; And a wireless speaker unit placed in the charging unit for receiving power through a charging connection terminal and receiving and outputting a wireless signal from the hands free module.

The wireless speaker unit and a charging battery that is charged by receiving power through a charging connection terminal; A demodulator for receiving and demodulating a radio signal from the hands free module; A power controller configured to switch power of the battery according to a carrier detection signal output from the demodulator; An audio amplifier for amplifying the signal output from the demodulator by the power supplied from the power controller; And a speaker for converting the signal output from the audio amplifier into voice.

The wireless speaker unit is inserted into the charging connection terminal of the charging unit so that their charging terminals are in contact so that the power of the charging unit is supplied to the charging battery of the wireless speaker unit.

An embodiment of the present invention configured as described above will be described in detail based on the accompanying drawings.

1 shows an embodiment of a hands-free device for a mobile radio telephone according to the present invention.

Hands-free device for a mobile wireless telephone according to the present invention includes a hands-free module (40) for detecting a call signal of the mobile wireless telephone (50) and wirelessly outputting; Cigar jack 10 for connecting the battery of the car and the rechargeable battery of the mobile radio telephone; A charging unit 20 installed in parallel to the cigar jack 10 and supplying charging power; And a wireless speaker unit 30 placed in the charging unit 20 to receive power through the charging connection terminals 43 and 44 and to receive and output a wireless signal from the hands free module 40.

The hands-free module 40 detects a signal input / output to the mobile radio telephone 50 and modulates and outputs a received voice signal. In the conventional hands-free connection terminal, a call signal input / output may be detected and output as a wireless signal.

2 is a block diagram showing the configuration of the hands free module of FIG.

Hands-free module 40 according to the present invention is a codec unit 25 for converting a call signal input / output to the mobile phone 50; A voice modulation transmitter 22 for modulating and transmitting a voice signal output from the codec unit 25; A microphone 24 for inputting a voice signal of a caller to the codec unit 25; And a transmission power control unit 21 for detecting a voice signal input / output from the codec unit 25 and controlling the power of the cigar jack 10 provided to the voice modulation transmitter 22.

The mobile telephone 50 is provided with a hands-free terminal so that the hands-free function can be achieved by connecting the hands-free module. The hands-free module 40 may be connected to the hands-free terminal to wirelessly output the received voice signal of the mobile wireless telephone 50. The radio signal output from the hands free module 40 uses a frequency different from the frequency range of the mobile radio telephone 50. As for the call signal from the hands-free terminal of the mobile wireless telephone 50, the voice signal and the call reception signal are detected by the codec unit 25 of the hands-free module 40 to output the 'power on' signal to the transmission power control unit 21. do. By the 'power on' signal, the transmission power control unit 21 supplies the power of the cigar jack 10 to the voice modulation transmitter 22. Powered voice modulation transmitter 22 modulates the voice signal output from codec unit 25 and wirelessly outputs it.

The wireless signal thus output is input to the wireless speaker unit 30. The wireless speaker unit 30 demodulates the received wireless signal to detect a voice signal, amplifies the voice signal, and outputs the voice to the speaker.

3 is a block diagram showing the configuration of the wireless speaker unit 30 of FIG.

The wireless speaker unit 30 of FIG. 1 includes a charging battery 31 that receives charging power through charging connection terminals 43 and 44 of the charging unit 20; A demodulator (33) for receiving and demodulating a radio signal from the hands free module (40); A power control unit 32 for switching the power of the battery 31 by the carrier detection signal output from the demodulation unit 33; An audio amplifier 35 for amplifying the signal output from the demodulator 33 by the power supplied from the power controller 32; And a speaker 36 for converting the signal output from the audio amplifier 35 into voice.

The demodulator 33 of the wireless speaker unit 30 receives a radio signal transmitted from the hands free module 40 through the antenna 34 and demodulates the voice signal. The demodulator 33 outputs a carrier detection signal to the power control unit 32 when receiving a radio signal from the antenna 34. The power control unit 32 switches when the carrier detection signal is input to supply the power of the charging battery 31 to the audio amplifier 35. The powered audio amplifier 35 amplifies the audio signal output from the demodulator 33 and outputs it to the speaker 36. The speaker 36 outputs a voice signal of the audio amplifier 35 as voice.

Since the wireless speaker unit 30 is used wirelessly, it may not be connected to a power source and be supplied with power at a predetermined place. Thus, a rechargeable battery may be used to store or use a primary battery. The current consumption of the demodulator 33 is 20 mA on average, even in the absence of a signal, and the current consumption of the audio amplifier 35 is 40 mA, so that the total current consumption is 60 mA even in the absence of a signal. The capacity of the rechargeable battery or primary battery is 700 mA for nickel-cadmium batteries, 1100 mA for nickel-hydrogen batteries, and 1500 mA for alkaline batteries. = 25 hours.

However, when power is supplied to the audio amplifier 35 only when there is a signal as in the present application, since the standby current consumption of the demodulator 33 is consumed only 20 mA in a standby state, 60 mA is consumed only during a call. In case of non-continuous call, current consumption can be saved considerably.

The wireless speaker device of the present invention is installed around the driver's seat using two or more, so that even when the reception volume is low, the reception sound can be heard from a plurality of devices so that the reception can be clearly heard, and the charging time using the primary battery as well as the rechargeable battery It can also be used by replacing the battery without waiting.

As described above, according to the present invention, since the hands-free can be positioned at any place, the headset and earphones can be eliminated from being in close contact with the ears, and the power is supplied to the audio amplifier only during a call. You can also extend the service time by using the battery.

Claims (3)

A hands-free module 40 which detects a call signal of the mobile radio telephone 50 and wirelessly outputs the call signal; Cigar jack 10 for connecting the battery of the vehicle and the rechargeable battery of the mobile phone; A charging unit 20 installed in parallel to the cigar jack 10 and supplying power for charging; And a wireless speaker unit 30 connected to the charging connection terminals 43 and 44 of the charging unit 20 to receive power and to receive and output a wireless signal from the hands-free module. . The method of claim 1, wherein the hands free module 40, A codec unit 25 for converting a call signal input / output to the mobile phone 50; A voice modulation transmitter 22 for modulating and transmitting a voice signal output from the codec unit 25; A microphone 24 for inputting a voice signal of a caller to the codec unit 25; And a transmission power control unit 21 for detecting the input / output voice signal from the codec unit 25 and controlling the power of the cigar jack 10 provided to the voice modulation transmitter 22. Handsfree device for mobile phones. The hands-free device for a mobile wireless telephone according to claim 1, wherein the wireless speaker unit (30) uses a primary battery.