JPH1051522A - On-vehicle telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily optionally attach a hands-free microphone or to make it easy to handle. SOLUTION: This on-vehicle telephone set has a wireless microphoneand- switch with which a microphone is put into a case together with a switch, and radio waves are radiated into a car body by modulating audio signals and switch signals. This radio wave is captured by an antenna 22 inside an on-vehicle adapter 20 and demodulated by a demodulation circuit 23, and the control signal and transmission signal of a portable telephone 21 attached to the on-vehicle adapter are provided. Then, hands-free speaking is performed, while using the wireless microphone-and-switch attached at an arbitrary position inside the car body and a fixed type speaker 7. In this case, subordinate hands- free speaking may be performed, while taking the wireless microphone-and- switch with a hand together with the fixed speaker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle telephone for making a call in a vehicle without putting a speaker of a handset or a speaker of a portable telephone into an ear.

[0002]

2. Description of the Related Art In a conventional automobile telephone, a hands-free call is carried out with a microphone and a speaker fixed to a vehicle while a handset is placed on a cradle. Since this microphone has to be connected to the cradle by an electric wire, there is a problem that it is difficult to retrofit after purchasing the vehicle or that the microphone cannot be placed at an arbitrary position.
There is also a wireless communication between the handset and the cradle, which can take the handset to an arbitrary position. However, the handset is heavy and the handset must be accurately placed on the ear.

[0003] There is also a portable telephone which is mounted in a vehicle with a vehicle-mounted adapter to form a vehicle-mounted telephone. This hands-free function has the same problem as described above because it uses a microphone attached to a vehicle-mounted adapter with an electric wire.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it easy to mount a microphone when talking using a speaker fixed in a vehicle, and it is possible to arbitrarily select a mounting position. Another object of the present invention is to provide an in-vehicle telephone that can be used as a quasi-hands-free phone call.

[0005]

According to the present invention, a microphone and at least one switch are provided in a vehicle, and a voice signal and a control signal from the microphone and the switch are modulated to generate a wireless signal. A wireless microphone and switch provided in one case with a wireless circuit transmitting in the vehicle,
And a demodulation circuit that receives and demodulates the wireless signal and obtains the demodulated audio signal and control signal, and performs a call between the microphone of the wireless microphone and switch and a fixed-type speaker, Since the on-board telephone is controlled by the control signal by the operation of, there is no need to connect the microphone with an electric wire, so the microphone can be attached to an arbitrary position, and a quasi-hands-free call can be held by hand. It can be.

According to a second aspect of the present invention, a microphone and at least one switch, and a voice signal and a control signal from the microphone and the switch are provided outside the on-vehicle adapter connected to a mobile phone, and a wireless signal is modulated. A wireless microphone and switch provided in one case and a wireless circuit for transmitting the signal in the vehicle, and a wireless circuit provided in the in-vehicle adapter for receiving and demodulating the wireless signal to obtain a demodulated audio signal. A demodulation circuit is provided for making a call between the microphone of the wireless microphone and switch and a fixed type speaker, and controlling the mobile phone connected to the onboard adapter by the control signal by operating the switch. Therefore, attach the mobile phone to the vehicle adapter,
It can be used as an in-vehicle telephone and performs the same operation as described above.

According to a third aspect of the present invention, the control signal from the demodulation circuit is input to the vehicle-mounted adapter-side control circuit, and the mobile phone is controlled by the control signal via the control circuit. . Therefore, without improving the mobile phone, only by improving the control circuit on the vehicle-mounted adapter side,
You can use a wireless microphone and switch.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. 1 to 3 show an embodiment of the telephone according to the present invention. In FIG. 1, reference numeral 1 denotes a wireless microphone and switch, and a microphone 2 is provided in one case 1a.
And switches 3, 4, 5, and 6, and a battery is housed inside.

Reference numeral 7 denotes a fixed speaker.
It is attached to an in-vehicle adapter which forms the main body 8 of the in-vehicle telephone. Note that this speaker may be mounted on the vehicle body.
9 is an external antenna of the vehicle. FIG. 2 shows an internal circuit of the wireless microphone and switch. Reference numeral 2 denotes a microphone, which converts a transmission voice into an electric signal. 3 to 6 are switches, and 11 is a signal generation circuit. When this signal generation circuit detects that any of the switches 3 to 6 has been pressed, it generates a signal corresponding thereto.

A modulation circuit 12 modulates an audio signal input from the microphone 2 or a switch signal input from the signal generation circuit 11 by a modulation method such as AM, FM, PM, or the like. A transmission circuit 13 transmits a radio wave of a specific frequency transmitted from the wireless microphone and switch from the built-in antenna 14. Next, the vehicle-mounted telephone body will be described with reference to FIG.

The vehicle-mounted telephone body is mounted on a vehicle-mounted adapter 20.
, A mobile phone 21, an antenna 22, and a demodulation circuit 23, which converts a signal input from the receiving circuit 24 into a baseband audio signal or a switch signal. A transmission circuit 26 amplifies or filters the audio signal input from the demodulation circuit 23 and outputs it to the connection interface 28.

Reference numeral 29 denotes a signal processing circuit which analyzes a switch signal input from the demodulation circuit and outputs a serial signal suitable for the state at that time to an upstream serial signal terminal 28a of the connection interface 28. Also, the signal processing circuit 2
9 also analyzes the signal input from the downstream serial signal terminal 28b of the connection interface 28. A receiving circuit 30 amplifies or filters an audio signal input from a receiving terminal 28c of the connection interface and outputs the amplified signal to the external speaker 7.

A series of operations using the hook switch 3 (start, end) of FIG. 1 will be described. When making a call somewhere, the telephone number of the other party is input to the mobile phone, and the switch 3 of the wireless microphone and switch 1 is pressed. Then, the signal generation circuit 11 of FIG. 2 detects that the switch has been pressed, and outputs a corresponding switch signal to the modulation circuit 12.
The modulation circuit converts the switch signal to a specific frequency,
Radio waves are transmitted from the antenna 14.

The in-vehicle adapter 20 receives the radio wave of the specific frequency from the antenna 22 by the receiving circuit 24, and converts the radio wave into a baseband switch signal by the demodulation circuit 23. This switch signal is analyzed by the signal processing circuit 29, and as a start command, the mobile phone 2 is connected through the connection interface 28.
1 up serial signal. The mobile phone performs call processing with the base station and starts talking.

During a telephone call, the transmitted voice is modulated through a microphone in the same manner as a switch signal, and is converted into a radio wave to produce a radio wave.
0, and is received by the antenna 22 and the receiving circuit 24. The voice received by the reception circuit 24 and demodulated by the demodulation circuit 23 is amplified or filtered by the transmission circuit 26 and becomes the transmission voice of the mobile phone through the connection interface 28. The received voice of the mobile phone is input to the receiving circuit 30 through the connection interface 28, amplified or filtered, and output to the fixed type speaker 7. In this way, hands-free calling becomes possible.

In the case of an end call, the signal of the switch 3 in FIG.
It is determined to be an end command. In addition, the switch signal at the time of an incoming call becomes a response (start) command. Here, the in-vehicle adapter 20 is housed and fixed in, for example, a center console box, and the mobile phone is connected by placing it on the center console box. The wireless microphone and switch 1 is fixed to a pillar on the driver side, for example.

The wireless microphone and switch wirelessly communicates with the vehicle-mounted adapter 20, so that there is no need to connect wires or the like. Also, since the wireless microphone and switch can be easily installed anywhere by anyone, it is possible to realize a safer and more convenient hands-free call tailored to the driver. Next, a second embodiment will be described with reference to FIGS.

In FIGS. 4 and 5, reference numeral 20 denotes a cradle constituting a vehicle-mounted adapter provided in the automobile, on which a case of a mobile phone 21 is placed. Reference numeral 40 denotes a cable for connecting the cradle 20 and the mobile phone 21, and a connector of a cable 40 can be connected by removing a rubber cover of a connector connecting portion. 4 and 5 show that the mobile phone and the cradle are connected by a cable.
Fig. 3 illustrates a connected vehicle antenna connection mode.

Next, an electric circuit diagram will be described. FIG.
In the figure, 21 is a mobile phone side, and 20 is a cradle side, that is, a vehicle-mounted adapter side. An antenna 60, a speaker 65, a microphone 66, and a wireless unit 61 connected to the antenna 60 are provided in the mobile phone 21.
The receiving high-frequency circuit 61a and the receiving low-frequency circuit 6
1b, frequency synthesizer 61c, transmission high-frequency circuit
61d, a transmission low frequency circuit 61e and the like are provided. The control circuit 67 outputs a signal to the display panel 68 and receives a signal from the operation key 69.

Reference numeral 70 denotes a battery, which is detachable from the main body of the portable telephone, and power from the battery is supplied to a power supply circuit 71. Next, on the cradle side 20, there are a fixed type speaker 7 attached to the cradle itself and a vehicle-mounted adapter-side control circuit 80.
Note that the speaker 7 may be fixed to any of the vehicle bodies. The power supply circuit 81 in the cradle is supplied with electric power from an automobile battery.

Further, a signal processing circuit 29 for communicating with a hands-free wireless microphone and switch provided in the automobile from the cradle 20 by radio waves, and a demodulation circuit 2
3, a receiving circuit 24, and an antenna 22 are provided. FIG. 7 schematically illustrates this connection state more easily and easily. The connector 40 a of the cable 40 can be connected to the connector connection portion of the mobile phone 21.
The other end of the cable 40 is connected to the cradle 20. The cradle 20 is configured to be supplied with power from a vehicle battery through a power line 91 via a cigarette lighter 90.

The cradle 20 has a feed line 92 for feeding a high-frequency signal from the cradle to the antenna and a connector 9.
The high-frequency output is transmitted to the vehicle antenna 9 via 3, 94. FIG. 8 shows the mounting of the wireless microphone and switch 95 on the steering pad 9.
6, the wireless microphone and switch 1 is detachably attached to the attachment 95.
A primary battery is housed inside the wireless microphone and switch.

In addition, a secondary battery may be housed in a case of the wireless microphone and switch, and at the time of charging, the wireless microphone and switch may be attached to a vehicle-mounted adapter for charging.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an on-vehicle telephone showing one embodiment of the present invention.

FIG. 2 is an electric circuit diagram of a wireless microphone and switch of the telephone.

FIG. 3 is an electric circuit diagram of the telephone body.

FIG. 4 is a plan view of a telephone body according to a second embodiment of the present invention.

FIG. 5 is a side view of a telephone body according to a second embodiment.

FIG. 6 is an electric circuit diagram of a second embodiment.

FIG. 7 is an overall connection diagram of the second embodiment.

FIG. 8 is a view showing how the wireless microphone and switch according to the second embodiment is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wireless microphone and switch 21 Mobile telephone 20 In-vehicle adapter 28 Connection interface 80 In-vehicle adapter side control circuit 23 Demodulation circuit 7 Fixed speaker

Claims (3)

[Claims] 1. A vehicle-mounted telephone used in a vehicle, wherein the vehicle-mounted telephone is fixed to one of the vehicle side and the vehicle-mounted telephone main body, and is a fixed-type speaker that reproduces a voice of a partner in the vehicle. Provided in the vehicle away from the phone body,
A microphone and at least one switch, and a wireless microphone and switch provided in one case, a wireless circuit for modulating an audio signal and a control signal from the microphone and the switch and transmitting the modulated signal as a wireless signal into the vehicle; A demodulation circuit in the main body of the vehicle-mounted telephone for receiving and demodulating a wireless signal to obtain a demodulated audio signal and a control signal; and performing a call between the microphone of the wireless microphone and switch and the fixed type speaker. And an on-vehicle telephone, wherein the on-vehicle telephone body is controlled by the control signal by operating the switch. 2. A mobile telephone connected to a vehicle-mounted adapter in a vehicle via a connection interface and used as a vehicle-mounted telephone, wherein the mobile phone is always fixed to one of the vehicle and the vehicle-mounted adapter. A fixed-type speaker that reproduces the voice of the other party; a microphone and at least one switch that are provided outside the vehicle-mounted adapter connected to the mobile phone; and modulates a voice signal and a control signal from the microphone and the switch. A wireless microphone and switch provided in one case, and a wireless circuit for transmitting the wireless signal as a wireless signal into the vehicle; a wireless microphone and switch provided in the in-vehicle adapter; receiving and demodulating the wireless signal; A demodulation circuit for obtaining the wireless microphone and switch. A telephone call between the microphone and the speaker, and controlling the mobile telephone connected to the vehicle-mounted adapter by the control signal by operating the switch. 3. The vehicle-mounted adapter according to claim 2, further comprising a vehicle-mounted adapter-side control circuit having a microcomputer connected to the connection interface in the vehicle-mounted adapter, wherein the control signal from the demodulation circuit is provided on the vehicle-mounted adapter side. An in-vehicle telephone set, which is input to a control circuit, and controls the mobile phone by the control signal via the control circuit.