JP2006050492A - Hands-free device for portable telephone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a hands-free device for portable telephone is desired which can be easily removed by a portable telephone itself, and in which components do not disturb carriage of the portable telephone and battery exchange is not required. <P>SOLUTION: A hands-free device for portable telephone of the present invention is comprised of a primary side device that is connected to an earphone/microphone terminal of the portable telephone and can be carried together with the portable telephone, and a secondary side device that is configured integrally with a portable phone holder fixed inside an automobile. The primary side device includes a primary side magnetic field coil unit for converting out an electric signal of a received voice supplied from the portable telephone into a magnetic flux signal, and the secondary side device includes a secondary side pickup coil unit for receiving the magnetic flux signal of the received voice outputted from the primary side device and converting out the magnetic flux signal into an electric signal, an amplifier for amplifying the electric signal of the received voice, and a speaker for converting the electric signal of the received voice amplified by the amplifier into a voice. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hands-free device for a mobile phone that enables a call without gripping the mobile phone while driving an automobile.

  Mobile phones are rapidly becoming popular because they can talk freely while moving without being limited by location and time, and the number of cases where mobile phones are used while driving is increasing. . In this case, since the mobile phone must be held with one hand, it is a one-handed operation during the call, which may impair safe driving of the car and hinder steering operations in an emergency. In addition, when a mobile phone is received and transmitted, the operation is manually performed, so that the concentration on the vehicle operation is distracted, which may cause a traffic accident. For this reason, due to the revision of the Road Traffic Law, the use of mobile phones has been prohibited while driving. However, the use of hands-free devices that can talk without having a mobile phone is allowed.

  In the conventional hands-free device, as described in Patent Document 1, a cable connection type earphone / microphone-type hands-free device that enables a call while holding the handle of an automobile with both hands is disclosed. In the disclosed technology, an earphone microphone main body in which an earphone and a microphone are set, and a connection plug provided at the tip of a connection cable extending from the earphone microphone main body are connected to an earphone microphone terminal of a mobile phone.

  Patent Document 2 discloses a hands-free device that transmits and receives audio signals from a microphone and a speaker to / from a mobile phone by radio waves. The disclosed technology is a main body unit that is attached to a mobile phone and incorporates wireless communication means using radio waves, a cable that extends from the main body unit, and is connected to an earphone microphone terminal of the mobile phone that is provided at the tip of the cable. A primary side transmitting / receiving device that can be carried together with a mobile phone comprising a connector, a microphone and a speaker, and transmitting and receiving audio signals using radio waves with the wireless communication means of the primary side transmitting / receiving device. It consists of two transmission / reception devices.

  Patent Document 3 discloses a hands-free device that transmits only a sound signal to a reception earphone from a mobile phone side by a wireless signal. In this disclosed technology, a microphone is connected to a telephone in a wired manner to transmit a first voice signal to the telephone, and a transmitter is connected to the telephone to receive the second voice signal of the telephone and convert it to a radio signal and transmit it. The receiving earphone receives the radio signal transmitted from the transmitter and converts it into a third audio signal so that the user can listen to it. The radio signal uses infrared or radio waves. When the transmitter is installed inside the telephone, the power of the transmitter can be supplied from the battery of the telephone.

Japanese Patent Laid-Open No. 10-285266 JP 2002-118635 A JP 2000-236382 A

  However, the above-mentioned cable connection type earphone / microphone-type hands-free device described in Patent Document 1 must attach / detach the connection plug to / from the earphone / microphone terminal of the mobile phone each time the vehicle gets on / off. For this reason, even if you have the hands-free device of the earphone microphone type, the connection plug may not be connected to the mobile phone until it becomes necessary to actually operate the mobile phone. In particular, when the connection operation is performed, the concentration on the vehicle operation is particularly distracting, which may cause a traffic accident. In addition, the connection cable itself extending from the earphone microphone main body may be entangled with the handle, the shift lever, or the like, thereby hindering driving. In addition, since the ears are closed with earphones, there is a problem that it is difficult to hear sounds such as alarm sounds from outside the vehicle.

  In addition, since the hands-free device using radio waves in which the microphone and the speaker described in Patent Document 2 are separated from the mobile phone, the mobile phone and the microphone and the speaker are not directly connected with a cable. However, it is difficult to transmit and receive audio signals using radio waves only with the power supplied from the earphone microphone terminal of the mobile phone. It was necessary to install a battery or to separately provide wiring for taking power from a cigarette lighter socket of an automobile, etc. However, when the battery is built in the primary side transmitting / receiving device, the weight and volume increase and the mobile phone is It is a hindrance when carrying, and informs the user of the battery status with an indicator or alarm before the battery runs out. That need is there has been an increase factor of cost. Also, when wiring for power from a car cigarette lighter socket, etc., it is necessary to attach / detach the power cord to / from the primary transmission / reception device every time a car gets in / out of the car. The connection of the power source is not made until it becomes necessary to operate the telephone, and when the connection operation is performed during driving such as when an unexpected incoming call is received, the concentration on the vehicle operation becomes particularly distracting, which may cause traffic accidents. There was a possibility.

  Furthermore, since the hands-free device for transmitting an audio signal from only the reception earphone described in Patent Document 3 from the mobile phone side by radio signal does not directly connect the mobile phone to the microphone and the speaker, the connection cable itself has a handle. In addition, it does not interfere with driving because of entanglement with the shift lever, etc., but it is difficult to transmit audio signals by radio waves using only the power supplied from the earphone microphone terminal of the mobile phone. It was necessary to install a battery on the side of the instrument or to provide a separate wiring for taking power from a cigarette lighter socket of an automobile. If a battery is built in the transmitter, the weight and volume increase, which is an obstacle when carrying a mobile phone, and it is necessary to inform the user of the battery status with an indicator or alarm before the battery runs out. It is a rise factor. Also, when wiring for taking power from a car's cigarette lighter socket, etc., it is necessary to attach / detach the power cord to / from the transmitter each time the car gets in / out of the car. The connection of the power supply is not made until it becomes necessary to operate the vehicle, especially when the connection operation is performed during driving such as when an unexpected incoming call is received. There was a possibility. In addition, the power of the transmitter can be supplied from the battery of the telephone by incorporating the transmitter of the radio wave inside the telephone, but the telephone and the hands-free device itself need to be specially designed in advance. It was impossible to adapt to a specific number of telephones. Furthermore, when infrared rays are used as radio signals, it is possible to transmit audio signals using infrared rays only with the power supplied from the earphone microphone terminal of the mobile phone, but between the transmitter and the receiving earphones. If there is an obstacle, there is a problem that communication becomes difficult. Further, in order to receive an infrared signal and convert it into an electric signal, a dedicated pickup element and circuit are required, which causes an increase in cost. It was.

  The present invention has been made to solve the above-described problems, and promotes the use of a hands-free device for mobile phones and contributes to safe driving.

  The present invention provides a hands-free device for a mobile phone comprising a primary device connected to an earphone microphone terminal of a mobile phone and portable with the mobile phone, and a secondary device fixed in a room of an automobile or the like. The primary-side device includes a connector connected to an earphone microphone terminal having an electric signal output terminal for reception voice and an electric signal input terminal for transmission voice, and an electric signal of reception voice supplied from the electric signal output terminal. Primary magnetic field coil unit that converts and outputs a magnetic flux signal, and a primary pickup coil that receives a magnetic flux signal of transmission voice output from the secondary side device, converts it to an electrical signal, and outputs it to the electrical signal input terminal The secondary side device receives the magnetic flux signal of the received voice output from the primary side device, converts it into an electrical signal, and outputs it. A secondary pickup coil unit, a speaker for converting the electric signal of the received sound into sound, a microphone for converting the transmitted sound emitted by the user into an electric signal, and converting the electric signal of the transmitted sound into a magnetic flux signal for output It has the secondary side magnetic field coil unit which carries out.

  In another embodiment of the present invention, for a mobile phone comprising a primary side device connected to an earphone microphone terminal of a mobile phone and portable with the mobile phone, and a secondary side device fixed in a room such as an automobile. In the hands-free device, the primary-side device is supplied from a connector connected to an earphone microphone terminal having an electric signal output terminal for reception voice and an electric signal input terminal for transmission voice of the mobile phone, and the electric signal output terminal. A primary-side magnetic field coil unit that converts an electric signal of received audio into a magnetic flux signal and outputs it, and a microphone that converts transmission audio emitted by a user into an electric signal and outputs the electric signal to the electric signal input terminal. The secondary side device receives the magnetic flux signal of the received sound output from the primary side device, converts it into an electrical signal, and outputs it. And dot and electric signal of the received speech, characterized in that it has a speaker-to-speech.

  The primary device preferably has a selection means for selecting whether or not transmission / reception of the mobile phone is via a hands-free device for mobile phone.

  Furthermore, it has a holder for holding the mobile phone, and in the state where the mobile phone to which the primary side device is connected is held by the holder, the secondary side is positioned near the primary side magnetic coil unit on the holder. It is preferable that the side pickup coil unit can be fixed.

  Further, it is preferable that each electrical component of the primary device is housed in an integral case, and a string that can be connected to a mobile phone is connected to the case.

  The primary device may be driven only by power supplied from the earphone microphone terminal of the mobile phone.

  Since the present invention uses a magnetic field coil that consumes less power and does not require a conversion circuit for transmission of an audio signal, and uses a pickup coil that consumes less power and does not require a conversion circuit for receiving an audio signal, The primary device connected to the terminal can be driven only by the electric signal supplied from the terminal for the earphone microphone, does not require a power source means such as a battery, can be configured to have a very small volume, Even when carrying around, there is no problem with the primary side device connected to the mobile phone.

  In addition, it is possible to switch whether or not the transmission / reception of the band phone is via the hands-free device for the mobile phone by means of detecting that it has been set in the change-over switch or the hands-free device for the mobile phone and automatically switching it. The operation becomes very simple, and the secondary pickup coil unit is fixed at a suitable position of the holder for holding the mobile phone in advance, so that the mobile phone can only be fixed to the holder when the vehicle is on board. When the hands-free device is set, the mobile phone can be used safely even when an unexpected incoming call is received.

  Furthermore, each electrical component of the primary side device is housed in an integrated case, and a string that can be connected to a mobile phone is connected to the case, so that the primary side device is lost when the mobile phone is carried. In addition, by providing a design element as an accessory to the appearance of the primary side device, there is no sense of incongruity even with an existing strap for a mobile phone, which leads to promotion of use.

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

  As shown in FIGS. 1 to 5, in the mobile phone holder for a vehicle according to the present invention, a primary device 3 that is connected to the earphone microphone terminal 2 of the mobile phone 1 and can be carried together with the mobile phone 1, and a room such as an automobile In the hands-free device for a mobile phone constituted by the secondary side device 4 fixed to the earphone, the primary side device 3 has an earphone having an electric signal output terminal for received voice and an electric signal input terminal for transmitted voice of the mobile phone 1. A connector 10 connected to the microphone terminal 2, a primary magnetic field coil unit 11 that converts a received voice electric signal supplied from the electric signal output terminal into a magnetic flux signal and outputs the magnetic signal, and an output from the secondary device 4. The primary pickup coil unit 12 that receives the magnetic flux signal of the transmitted voice, converts it to an electrical signal and outputs it to the electrical signal input terminal, and the transmission of the mobile phone 1 Shin has a changeover switch 13 for selecting whether or not intervention of a hands-free device for a mobile phone. Instead of the change-over switch 13, means for automatically detecting that it has been set in the hands-free device for cellular phones (for example, a magnetic flux signal sent from the secondary-side magnetic coil unit is used as the primary-side pickup coil unit 12. May be automatically switched to the hands-free mode, and the mobile phone 1 performs transmission / reception via the hands-free device.

  Further, in the primary device 3, each electrical component is housed in an integrated case 14, and a string 15 that can be connected to the mobile phone 1 is connected to the case 14, and each electrical component is connected to an earphone microphone terminal. It is driven only by the electric power supplied from 12.

  The secondary side device 4 receives the magnetic signal of the received voice output from the primary side device 3, converts it into an electrical signal and outputs it, and the electrical signal of the received voice. An amplifier (not shown) for amplifying the sound, a speaker 21 for converting the electric signal of the reception sound amplified by the amplifier into sound, a microphone 22 for converting the transmission sound emitted by the user into an electric signal, and the transmission sound The secondary magnetic field coil unit 23 converts the electrical signal into a magnetic flux signal and outputs it, and power for the amplifier is supplied from a cigarette lighter plug 24 inserted into a cigarette lighter socket of the automobile. Each electrical component of the secondary device 4 is configured integrally with a holder 25 that holds the mobile phone 1, and the secondary pickup coil unit 20 and the secondary magnetic coil unit 23 are in a case. 26 and can be fixed to the holder 25 at a position close to the primary magnetic field coil unit 11 and the primary pickup coil unit 12 of the primary device 3 in a state where the mobile phone 1 is held by the holder 25. As described above, the fixing portion 27 of the case 26 is fixed to the slits 28 provided on the left and right side surfaces of the holder so as to be vertically adjustable. The fixing position of the secondary side pickup coil unit 20 and the secondary side magnetic coil unit 23 is not limited to the side surface of the holder 25, and may be fixed to the back surface of the holder 25 or the like. You may fix separately near the holder 25, without fixing to.

  As a second embodiment of the present invention, as shown in FIGS. 6 to 10, a primary device 5 that is connected to the earphone microphone terminal 2 of the mobile phone 1 and can be carried with the mobile phone 1, and a room such as an automobile. In a hands-free device for a mobile phone constituted by a fixed secondary device 6, the primary device 5 has an earphone microphone having an electric signal output terminal for reception voice and an electric signal input terminal for transmission voice of the mobile phone 1. A connector 10 connected to the terminal 2 for use, a primary-side magnetic coil unit 11 that converts the electric signal of the received voice supplied from the electric signal output terminal into a magnetic flux signal, and outputs the transmitted voice generated by the user. A microphone 16 that converts the signal into a signal and outputs the signal to the electrical signal input terminal, and a switching switch that selects whether transmission / reception of the cellular phone 1 is performed via a hands-free device for cellular phones. Having a switch 13. Instead of the change-over switch 13, a means for automatically detecting the fact that it is set in the hands-free device for the mobile phone (for example, a push button of the change-over switch is brought into contact with a holding tool for holding the mobile phone 1. The push button may be automatically pushed in a state where the mobile phone 1 is fixed to the holder.

  Further, in the primary side device 5, each electrical component is housed in an integrated case 17, and a string 15 that can be connected to the mobile phone 1 is connected to the case 17, and each electrical component is an earphone microphone terminal. 2 is driven only by the electric power supplied from 2.

  The secondary side device 6 receives the received voice magnetic flux signal output from the primary side device 5, converts it into an electrical signal and outputs it, and outputs the received voice electrical signal. A cigarette lighter having at least a power source of the amplifier inserted into a cigarette lighter socket of an automobile. Supplied from the plug 24. Each electrical component of the secondary device 6 is integrally formed with a holder 29 that holds the mobile phone 1, and the secondary pickup coil unit 20 is housed in a case 30, and the holder 29 The fixing portion 31 of the case 30 is provided on the left and right sides of the holding device 29 so that the mobile phone 1 can be fixed to the holding device 29 at a position close to the primary magnetic field coil unit 11 of the primary device 5 while the mobile phone 1 is held. It is fixed to the slit 32 provided on the side surface so as to be adjustable up and down. The fixing position of the secondary pickup coil unit 20 is not limited to the side surface of the holding tool 29, and may be fixed to the back surface of the holding tool 29 or the like. It may be fixed separately nearby.

It is a block diagram which shows the form of 1st Example of this invention. It is explanatory drawing of the primary side apparatus of 1st Example of this invention. It is explanatory drawing of the principal part of the secondary side apparatus of 1st Example of this invention. It is a perspective view for explanation of the 1st example of the present invention. It is an explanatory perspective view of the use condition of the 1st example of the present invention. It is a block diagram which shows the form of 2nd Example of this invention. It is explanatory drawing of the primary side apparatus of 2nd Example of this invention. It is explanatory drawing of the principal part of the secondary side apparatus of 2nd Example of this invention. It is a perspective view for explanation of the 2nd example of the present invention. It is a perspective view for demonstrating the use condition of 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Terminal for earphone microphone 3 Primary side device 4 Secondary side device 5 Primary side device 6 Secondary side device 10 Connector 11 Primary side magnetic coil unit 12 Primary side pickup coil unit 13 Changeover switch 14 Case 15 String 16 Microphone 17 Case 20 Secondary side pickup coil unit 21 Speaker 22 Microphone 23 Secondary side magnetic field coil unit 24 Cigarette lighter plug 25 Holder 26 Case 27 Fixed part 28 Slit 29 Holder 30 Case 31 Fixed part 32 Slit

Claims (6)

  In a hands-free device for a mobile phone configured by a primary device connected to an earphone microphone terminal of a mobile phone and portable with the mobile phone, and a secondary device fixed in a room of an automobile or the like, the primary device is: A connector connected to an earphone microphone terminal having an electric signal output terminal for receiving voice and an electric signal input terminal for transmitting voice, and an electric signal of the received voice supplied from the electric signal output terminal as a magnetic flux signal. A primary-side magnetic coil unit that converts and outputs, and a primary-side pickup coil unit that receives the magnetic flux signal of the transmission voice output from the secondary-side device, converts it into an electrical signal, and outputs it to the electrical signal input terminal The secondary side device receives the magnetic flux signal of the received sound output from the primary side device, converts it into an electrical signal, and outputs the electrical signal. An up-coil unit, a speaker for converting the electric signal of the received sound into sound, a microphone for converting the transmitted sound emitted by the user into an electric signal, and an electric signal for converting the electric signal of the transmitted sound into a magnetic flux signal for output. A hands-free device for a mobile phone, comprising a secondary magnetic field coil unit.   In a hands-free device for a mobile phone configured by a primary device connected to an earphone microphone terminal of a mobile phone and portable with the mobile phone, and a secondary device fixed in a room of an automobile or the like, the primary device is: A connector connected to an earphone microphone terminal having an electric signal output terminal for receiving voice and an electric signal input terminal for transmitting voice, and an electric signal of the received voice supplied from the electric signal output terminal as a magnetic flux signal. A primary side magnetic coil unit that converts and outputs, and a microphone that converts a transmission sound emitted by a user into an electrical signal and outputs the electrical signal to the electrical signal input terminal. The secondary side device is more than the primary side device. A secondary side pickup coil unit that receives the magnetic flux signal of the received reception sound, converts it into an electrical signal and outputs it, and outputs the electrical signal of the reception sound as a sound. Mobile phone hands-free device, characterized in that it has a speaker to convert to.   3. The hands-free device for a mobile phone according to claim 1, wherein the primary side device has selection means for selecting whether transmission / reception of the mobile phone is performed via a hands-free device for a mobile phone.   A holding device for holding the mobile phone, and holding the mobile phone connected to the primary side device in the holding device, the secondary side at a position close to the primary side magnetic coil unit on the holding device; 4. A hands-free device for a mobile phone according to claim 1, wherein the pickup coil unit can be fixed.   5. The mobile phone according to claim 1, 2, 3 or 4, wherein each electrical component of the primary device is housed in an integrated case, and a string connectable to a mobile phone is connected to the case. Hands-free device for telephones.   6. The hands-free device for a mobile phone according to claim 1, wherein the primary device is driven only by electric power supplied from an earphone microphone terminal of the mobile phone.