JP2001148728A - Handsfree device for portable telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a handsfree device to be easily attached to a portable telephone, to be safely and easily operated without any hindrance to a drive and to receive and cut off a telephone call as a portable telephone bearer intends. SOLUTION: An adapter main body 14 is inserted into and extracted from the cassette deck 10 of a car audio system mounted on an automobile and in this adapter main body 14, an electromagnetic transducing element 16 which is electromagnetically coupled abutting against a magnetic head 13 in play operation and an off-hook/on-hook switch 18 are provided; when the cassette deck 10 is placed in the play operation, the magnetic head 13 is made to about against the electromagnetic transducing element 16 and the off-hook/on-hook switch 18 is turned on to turn on the portable telephone set 15 with its in signal for a handsfree telephone call. When the cassette deck 10 is placed in stop, the magnetic head 13 is made to leave the electromagnetic transducing element 16 and the off-hook/on-hook switch 18 is turned off place the portable telephone set 15 in the on-hook state with its off signal, thereby disconnecting the line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hands-free device for a portable telephone, which enables a user to talk while holding a portable telephone while driving a car.

[0002]

2. Description of the Related Art In recent years, with the progress of the information society, the social structure and the range of people's activities have been diversified and expanded, and the role played by mobile communication has become increasingly important. In particular, mobile communication on land has been remarkably growing, and with the advancement of technology for miniaturizing electronics, portable telephones such as PHSs that have been reduced in size and weight have appeared. These mobile phones are rapidly spreading and expanding because they can freely talk while moving, without being restricted by place or time. On the other hand, the place where the mobile phone is used is not limited to indoors and outdoors, and is often used even while driving a car. In this case, since the user must hold the mobile phone with one hand, one-hand driving is performed during the call, so that the safe driving of the car is impaired, and there is a possibility that the steering wheel operation in an emergency may be hindered. In addition, if the call time becomes longer and the driver's consciousness concentrates on the content of the call,
Concentration on driving a car becomes distracted, causing a traffic accident. Due to the revision of the Road Traffic Law, the use of mobile phones while driving a car has been prohibited. However, use of a hands-free device that allows a user to talk without having a mobile phone is permitted.

[0003] Conventionally, as a hands-free device for a mobile phone used while driving such an automobile, an earphone and a microphone are set, and this is inserted into an earphone jack of the mobile phone via a plug. An earphone / microphone type that connects to a mobile phone and enables calls while holding the steering wheel of the car with both hands, or a set of speakers and microphone, which is plugged into the earphone jack of the mobile phone via a plug Detects incoming calls from the mobile phone to a speaker / microphone type that allows the user to talk while holding the steering wheel of the car with both hands, or to connect to the mobile phone by plugging in. Automatically off-hook the phone and respond to on-hook by the other party Incorporated a device for on-hook (disconnect) control, and a device that enables the speaker of the car audio device and the newly added microphone to operate to enable talking with the caller has been developed. Has been offered to.

[0004]

The above-mentioned hands-free device of the earphone / microphone type is easy to mount including connection to a portable telephone, but on the other hand, the earphone must be directly worn on the ear. In addition, many people complain about the feeling of use and complain about the feeling of use. In addition, since the ears are closed with earphones, there is a problem that it is difficult to hear sounds from outside the vehicle such as alarm sounds. In addition, in order to make a call when a mobile phone receives a call, a small incoming call button provided on the mobile phone must be pressed, and this incoming button is selected from the operation panel of the mobile phone during driving of the automobile. Operation may be difficult and may hinder safe driving of the vehicle.

Further, in the above-described speaker / microphone type hands-free device, since the voice of the other party can be heard from the speaker, dissatisfaction with the feeling of use and sound from outside the vehicle as in the earphone / microphone type handsfree device. It can solve the problem that it is difficult to hear, but on the other hand, the installation of the speaker inside the car is troublesome, and, like the earphone / microphone hands-free device, the incoming call button is operated by the operation panel of the mobile phone while driving the car. It is difficult to select and operate from the aspect, and there is a risk that it will hinder safe driving of the automobile. In addition, in the above-described hands-free device using a device that performs automatic incoming and outgoing calls, it is necessary to incorporate the hands-free device itself into the audio device, so that it becomes expensive and the assembly becomes troublesome. There was a problem that a caller would automatically enter a call state even if he or she did not want to make a call or under any circumstances.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to realize a hands-free system using a cassette deck of a car audio system mounted on an automobile, so that installation is simple and easy. It is another object of the present invention to provide a low-cost hands-free device for a mobile phone, which enables safe and easy operation without hindering driving, and enables incoming and outgoing calls at the will of the owner of the mobile phone.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a hands-free device for realizing a hands-free portable telephone using a cassette deck and a speaker of a car audio system mounted on an automobile. An adapter body detachably inserted into the cassette deck having a magnetic head for the tape cassette and formed in the same outer shape as the tape cassette; An electromagnetic conversion element which is provided movably in a direction in which the magnetic head is brought into contact with the magnetic head by a play operation of the cassette deck, and which is provided in the adapter main body in correspondence with the electromagnetic conversion element. Movement of the electromagnetic transducer when the magnetic head comes into contact with the electromagnetic transducer by the play operation of the deck A telephone call / disconnect switch that is turned on when the magnetic head moves away from the electromagnetic transducer by moving the electromagnetic head away from the electromagnetic transducer by a stop operation of the cassette deck; A microphone which picks up the voice of the mobile phone and supplies it to the mobile phone. The mobile phone is off-hook (communicable) by the ON signal of the call / disconnect switch, and the mobile phone is on-hook (communication disconnected) by the OFF signal of the call / disconnect switch. Then, a voice signal received from the other party when the mobile phone receives a call is supplied from the electromagnetic transducer to the speaker of the car audio system through the magnetic head.

In the present invention, a play operation of the cassette deck brings the magnetic head into contact with the electromagnetic transducer 16 and turns on the talk / disconnect switch, and the mobile phone is hooked off by the ON signal to enable hands-free talk. Also, by stopping the cassette deck, the magnetic head is separated from the electromagnetic transducer, and
The disconnection switch is turned off, and the cellular phone 15 is hooked and disconnected by the off signal. Therefore, according to the present invention, a hands-free device can be easily attached using an existing car audio system, and a safe and easy hands-free operation that does not hinder driving can be performed. Incoming and outgoing calls can be made at will.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view for explaining a hands-free device and a cassette deck of a mobile phone according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a relationship between the hands-free device and a mobile phone according to an embodiment of the present invention. FIG. 3 is a circuit configuration diagram of the electromagnetic transducer and the talk / disconnect switch mounted in the adapter body for the adapter according to the embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 10 denotes a cassette deck of a car audio system. The cassette deck 10 is provided with a reel shaft 11 and a capstan 12 for a tape cassette. Recording / reproducing magnetic head 13 moving in the direction of arrow A
And pinch roller 121 pressed against capstan 12
The magnetic head 13 is connected to a speaker 92 of the car audio system main body 9 via an amplifier (not shown). Reference numeral 14 denotes an adapter body which constitutes a hands-free device for realizing hands-free operation of the mobile phone 15 using a cassette deck and a speaker of a car audio system.
Reference numeral 4 is formed in the same outer shape as a tape cassette (not shown) which is removably inserted into the cassette deck 10 of the car audio system. A hole 141 through which the reel shaft 11 is inserted when the adapter body 14 is inserted into the cassette deck 10 is provided at a position of the adapter body 14 corresponding to the reel shaft 11 of the cassette deck 10 in the thickness direction of the adapter body 14. The adapter body 14 corresponding to the capstan 12 of the cassette deck 10 has a hole 1 through which the capstan 12 is inserted when the adapter body 14 is inserted into the cassette deck 10.
42 is formed through the adapter body 14 in the thickness direction.

The front end side surface 143 of the adapter body 14
A window 144 is formed at an intermediate portion of the magnetic head 1 at a position desired for the window 144 in the adapter body 14.
An electromagnetic conversion element 16 which is in contact with and electromagnetically coupled with the magnetic head 3 is provided so as to be movable toward and away from the magnetic head 13, and this electromagnetic conversion element 16 is provided with a spring (biasing means) 17.
Is biased in a direction approaching the magnetic head 13. Further, in the vicinity of the electromagnetic transducer 16 in the adapter main body 14, the magnetic head 13 is turned on in conjunction with the movement of the electromagnetic transducer 16 when the magnetic head 13 contacts the electromagnetic transducer 16 by the play operation of the cassette deck 10, And a call / disconnect switch 1 which is turned off in conjunction with the movement of the electromagnetic transducer 16 when the magnetic head 13 is separated from the electromagnetic transducer 16 by stopping or ejecting the cassette deck 10.
8 are provided.

One end of a multi-core signal cable 19 for lead is fixed to one side of the adapter body 14, and an electromagnetic transducer 16 is connected to the multi-core signal cable 19 via a resistor 20 (see FIG. 3). The call / disconnect switch 18 is connected to the multi-core signal cable 19, and the microphone 22 is connected to the end of the multi-core signal cable 19 on the adapter body 14 side via a signal line 21 for lead. I have. The other end of the multi-core signal cable 19 is configured to be detachably connected to a multi-pole jack 24 provided on the mobile phone 15 via a multi-pole plug 23.

Next, the operation of the hands-free device according to the present embodiment configured as described above will be described.
When the hands-free mobile phone is realized by using the cassette deck 10, first, the adapter body 14 is attached to the cassette deck 10 of the car audio system body 9 shown in FIG.
, The microphone 22 is attached to a sun visor or the like near the driver via a clip, and the multi-pole plug 23 of the multi-core signal cable 19 is inserted into the multi-pole jack 24 of the mobile phone 15. When the multi-pole plug 23 is inserted into the multi-pole jack 24, the transmitting microphone and the receiving speaker of the mobile phone 15 are separated from the baseband circuit section constituting the mobile phone 15. At this time, the mobile phone 15 is placed in a passenger seat of a car or the like.

In this state, when there is an incoming call to the portable telephone 15, the play button 91 provided on the panel surface of the car audio system main body 9 is pressed to put the cassette deck 10 into the play state. Play button 9
1 is pressed, the magnetic head 13 including the pinch roller 121 moves in the direction of arrow A in FIG.
And moves the electromagnetic transducer 16 in the direction of arrow B1 in FIG. Electromagnetic transducer 16
Is moved in the direction of arrow B1 in FIG. 1, the call / disconnect switch 18 is turned on, and the ON signal is supplied to the mobile phone 15 through the multi-core signal cable 19, the multi-pole plug 23 and the multi-pole jack 24, and The telephone 15 is off-hook (communicable). As a result, when the mobile phone 15 enters a talking state, the voice signal of the other party received by the mobile phone 15 is transmitted from the baseband circuit section of the mobile phone 15 through the multi-pole jack 24, the multi-pole plug 23 and the multi-core signal cable 19. It is supplied to the electromagnetic transducer 16. In the electromagnetic conversion element 16, the audio signal is converted into an electromagnetic signal and supplied to the magnetic head 13. Therefore, the magnetic head 13 converts the electromagnetic signal into an audio signal, and the speaker 9 connected to the car audio system body 9 through an amplifier (not shown).
2 to the speaker 9
You can hear it in 2.

On the other hand, the voice spoken by the owner of the portable telephone is picked up by the microphone 22, and the voice signal is transmitted to the multi-core signal cable 19, the multi-pole plug 23 and the multi-pole jack 2.
4 and transmitted to the mobile phone 15, and further transmitted through a baseband circuit unit and a wireless circuit unit built in the mobile phone 15. Thus, it is possible to talk with the calling party hands-free while driving the car.

When the stop button 93 provided on the panel surface of the car audio system main body 9 is pressed with the end of the call with the caller, the magnetic head 13 including the pinch roller 121 is moved in the direction indicated by the arrow A in FIG. The electromagnetic transducer 16 moves in the opposite direction, moves away from the electromagnetic transducer 16, and the electromagnetic transducer 16 is moved by the spring 17 in the direction of arrow B2 in FIG. When the electromagnetic transducer 16 is moved in the direction of arrow B2 in FIG. 1, the talk / disconnect switch 18 is turned off, and the off signal is transmitted to the mobile phone 15 through the multi-core signal cable 19, the multi-pole plug 23 and the multi-pole jack 24. Supplied. As a result, the mobile phone 15 is hooked on (disconnected), and the wireless line with the caller is also disconnected. When taking out the adapter body 14 from the cassette deck 10,
What is necessary is just to press the eject button 94 provided on the panel surface of the car audio system main body 9.

According to the above-described embodiment, in order to realize the hands-free operation of the portable telephone using the cassette deck 10 and the speaker 92 of the car audio system mounted on the automobile, the portable telephone is attached to and detached from the cassette deck 10. An adapter body 14 is provided so as to be inserted thereinto, and an electromagnetic conversion element 16 and a talk / disconnect switch 18 are provided in the adapter body 14 to be in contact with the magnetic head 13 during play operation and to be electromagnetically coupled. The player touches the magnetic head 13 to the electromagnetic transducer 16 and turns on the talk / disconnect switch 18, and the mobile phone 15 is hooked off by the ON signal to enable hands-free talk. When the stop operation is performed, the magnetic head 13 is separated from the electromagnetic transducer 16 and the call / Since the disconnect switch 18 is turned off and the mobile phone 15 is turned on and disconnected by the off signal, the hands-free device can be easily attached using the existing car audio system, and there is no obstacle to driving. In addition, a safe and easy hands-free operation can be performed, and incoming and outgoing calls can be made at the will of the owner of the mobile phone, and a hands-free device can be provided at low cost.

[0018]

As described above, according to the present invention, it is possible to use a cassette deck and a speaker of a car audio system mounted on an automobile to realize a hands-free portable telephone, so that the portable telephone can be detachably attached to the cassette deck. An adapter body to be inserted and attached is provided. An electromagnetic conversion element and a talk / disconnect switch are provided in the adapter body, which are in contact with the magnetic head and electromagnetically coupled during a play operation, and a talk / disconnect switch is provided. A contact / disconnect switch is turned on at the same time as contacting the conversion element 16, the mobile phone is hooked off by the ON signal to enable hands-free communication, and the magnetic head is separated from the electromagnetic conversion element by stopping operation of the cassette deck. At the same time, turns off the call / disconnect switch, and activates the cellular phone 15 by the off signal. In addition, the hands-free device can be easily installed using the existing car audio system, and safe and easy hands-free operation that does not hinder driving can be performed. In addition to being able to receive and disconnect calls at the will of the telephone owner, a hands-free device can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of a hands-free device and a cassette deck of a mobile phone according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a handsfree device and a mobile phone according to the embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of an electromagnetic conversion element and a talk / disconnect switch mounted in an adapter body for an adapter according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 9 car audio system main body, 92 speaker 10 cassette deck 13 magnetic head 14 adapter main body 15 mobile phone 16 electromagnetic conversion element 17 spring (biasing means) 18 call / disconnect switch 19 multi-core signal cable 21 signal line 22 microphone 23 multi-pole plug 24 multi-pole jack

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04M 1/02 H04B 7/26 Q 1/21 V F term (reference) 3D020 BA02 BA07 BA11 BB01 BC03 BD14 BE01 5K023 AA07 AA09 BB18 EE12 FF04 MM14 MM22 NN06 5K027 AA11 AA16 BB02 DD11 DD14 HH03 HH29 KK07 5K067 AA35 AA41 BB03 BB04 BB43 DD23 EE02 EE39 FF38 GG01 GG11 HH21 KK00

Claims (3)

[Claims] 1. A hands-free device for realizing hands-free operation of a mobile phone using a cassette deck and a speaker of a car audio system mounted on an automobile, wherein the hands-free device is attached to and detached from the cassette deck having a magnetic head for a tape cassette. An adapter body which is inserted so as to be capable of being inserted and formed in the same outer shape as the tape cassette, and is provided in the adapter body so as to be movable in a direction approaching and separating from the magnetic head. An electromagnetic conversion element which is electromagnetically coupled with the magnetic head, and which is provided in the adapter main body so as to correspond to the electromagnetic conversion element, and wherein the magnetic head comes into contact with the electromagnetic conversion element by playing the cassette deck; Is turned on in conjunction with the movement of the electromagnetic transducer at the time, and the cassette deck is stopped. A call / disconnect switch that is turned off in conjunction with movement of the electromagnetic transducer when the magnetic head is separated from the electromagnetic transducer by operation; and a microphone that picks up the voice of the mobile phone owner and supplies the voice to the mobile phone The mobile phone is off-hook (communicable) by the on signal of the call / disconnect switch, the mobile phone is on-hook (communication cut off) by the off signal of the call / disconnect switch, A hands-free device for a mobile phone, wherein a sound signal from the mobile phone is supplied from the electromagnetic transducer through the magnetic head to a speaker of a car audio system. 2. A hands-free device for a mobile phone according to claim 1, further comprising an urging means for urging said electromagnetic transducer in a direction approaching said magnetic head. 3. The electromagnetic transducer and the call / disconnect switch are connected to one end of a signal cable fixed to the adapter body, and the microphone is connected to one end of the signal cable via a signal line. 2. The hands-free device for a mobile phone according to claim 1, wherein the other end of the signal cable is detachably connected to a multi-pole jack of the mobile phone via a multi-pole plug.