JPH0555947A - Radio telephone set - Google Patents

Abstract

(57) [Abstract] [Purpose] S / N in wireless telephone devices such as car telephones.
It is possible to send a high audio signal to the other party. [Structure] The power supply of the wireless telephone device main body is supplied from a cigarette lighter plug 7 inserted in a cigarette lighter socket, and the cigarette lighter plug 7 is provided with a microphone unit 21 for voice transmission input. By supporting the microphone unit 21 in the inside by the microphone supporting member 20 having a high vibration-proof effect, the vibration during traveling is not directly applied to the microphone unit 21, and the noise caused by the vibration is eliminated, so that the S / N ratio is improved. A high-quality audio signal can be transmitted to the other party.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device such as a car telephone.

[0002]

2. Description of the Related Art Conventionally, a wireless telephone device such as a car telephone often makes a call while driving a vehicle. Therefore, it is desirable that a hands-free call can be made without a handset.

Therefore, conventionally, a hands-free wireless telephone device as shown in FIG. 2 has been provided.

In this figure, reference numeral 1 is a microphone unit for transmitting voice input, 2 is a speaker unit for outputting voice reception, 3
Is a circuit unit for suppressing ringing sound generated by acoustic coupling (howling) between the microphone unit 1 and the speaker unit 2, 4 is a main body of the wireless telephone device, and 5 is an antenna.

In the above conventional radiotelephone device, the microphone unit 1 converts the voice uttered by the user into an electric signal and sends it to the radiotelephone device main body 4 via the suppression circuit unit 3.
The main body 4 of the wireless telephone device converts this electric signal into an electromagnetic wave and sends it out from the antenna 5 to the other party.

Further, the electromagnetic wave emitted from the other party is received by the antenna 5, converted into a voice signal by the radio telephone main body 4, and is output to the speaker unit 2 via the suppression circuit unit 3 to produce a speaker. The contents of the other party's call are transmitted from the unit 2 to the user via the speaker unit 2.

FIG. 3 shows a concrete example in which the above conventional radio telephone device is mounted in an automobile. The power source of the radio telephone device main body 4 is supplied from a cigarette lighter plug 7 inserted in a cigarette lighter socket 6 of the automobile through a cable 8. In the cigarette lighter plug 7, a transmission voice input microphone unit 1 having acoustically directional characteristics is installed as shown in FIG.

In the figure, 9 is a plus electrode provided at the tip of the cigarette lighter plug 7, 10 is a minus electrode,
The electric power extracted from the electrodes 9 and 10 is sent to the radio telephone device body 4 via the connection cable 11 in the cigarette lighter plug 7 and the cable 8.

In the conventional radiotelephone device configured as described above,
When a telephone user driving a car emits a voice to make a call, the voice is collected by the microphone unit 1 having acoustic directivity and converted into a voice signal.

At this time, even if there is noise in the automobile, the influence of noise is reduced due to the acoustic properties of the microphone unit 1, and a voice signal with an improved S / N is transmitted to the radio telephone main body 4
To the other party through the antenna 5.

The call of the other party is converted into a voice signal in the main body 4 of the radio telephone and then transmitted to the user as voice from the speaker unit 2 provided in the main body 4 of the radio telephone, and the speaker unit 2 and the microphone The ringing sound generated by the acoustic coupling between the units 1 is suppressed by the suppression circuit unit 3 provided in the wireless telephone device body 4.

[0012]

However, in the above-described conventional wireless telephone device, the microphone unit 1 is directly fixed in the cigarette lighter plug 7 via the support 13 as shown in FIG. Vibration or the like is transmitted from the cigarette lighter socket 6 to the microphone unit 1 through the cigarette lighter plug 7, and noise is generated in the microphone unit 1 due to this vibration, and this noise is sent to the other party together with the voice signal. As a result, the other party hears the voice whose S / N is lowered, and the conventional wireless telephone has a drawback that the voice is difficult to hear.

The present invention has been made to solve the above-mentioned drawbacks, and provides a radiotelephone device in which noise caused by vibration during traveling is less likely to be mixed in a voice signal.
The object is to enable transmission of a transmission voice signal having a good / N to the other party.

[0014]

To achieve the above object, the present invention inserts a cigarette lighter plug into a cigarette lighter socket provided in the vicinity of the front of a driver's seat in a vehicle, and uses the cigarette lighter plug to insert the inside of the vehicle through a cable. The power supply to the main body of the wireless telephone device installed in, the microphone unit for transmitting voice input in the cigarette lighter plug, and the speaker unit for receiving voice output in the main body of the wireless telephone device and the microphone unit and speaker unit In a radiotelephone device provided with a circuit unit for suppressing acoustic coupling, the microphone unit provided in the cigarette lighter plug is supported by a microphone support member having a vibration isolation effect.

[0015]

With the above structure, the vibration during traveling is not directly applied to the microphone unit, so that the noise due to the vibration is not mixed into the voice signal, and the voice signal with high S / N can be sent to the other party. become able to.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIG.

The same parts as in the prior art are designated by the same reference numerals, and detailed description thereof will be omitted. In FIG. 1, 7 is a cigar lighter socket 6 provided in front of the driver's seat of the automobile.
(See FIG. 3) A detachable cigar lighter plug, into which a microphone unit 21 for transmitting voice is attached via a plurality of microphone supporting members 20.

The microphone supporting member 20 is made of an elastic material such as rubber having a property of absorbing vibration, and supports the outer peripheral portion of the cylindrical housing 22 of the microphone unit 21. There is. A plurality of microphone support members 23 made of the same material as the microphone support member 20 are also provided in the housing 22, and the microphone main body 24 causes the microphone body 24 to be substantially at the center of the housing 22. Supported by. The microphone main body 24 is connected to the wireless telephone device main body 4 via a connection line 11 wired in the cigarette lighter plug 6 and a cable 8 connecting the cigarette lighter plug 6 and the wireless telephone device main body 4.

The operation will now be described. The cigarette lighter plug 7 having the microphone unit 21 incorporated therein is also used by inserting it into the cigarette lighter socket 6, but the case 22 and the microphone body 24 of the microphone unit 21 are vibration-proof. Since it is supported by the microphone supporting members 20 and 23 that have the effect, the vibration during traveling is not transmitted to the microphone unit 21, and the noise caused by the vibration is eliminated by this, so that a voice signal with a high S / N is obtained. The wireless telephone device body 4
Can be sent to.

[0020]

As described in detail above, according to the present invention, since the microphone unit for transmitting voice input provided in the cigarette lighter plug is supported by the microphone supporting member having a high vibration damping effect, the vibration during running is directly It is not transmitted to the microphone unit.

As a result, noise due to vibration can be reduced, so that a voice signal with a high S / N can be sent to the other party, and the drawbacks such as the voice of a car telephone being difficult to hear can be solved. .

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a microphone unit portion for transmitting voice input of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional wireless telephone device.

FIG. 3 is a plan view showing a state in which a conventional wireless telephone device is mounted on an automobile.

FIG. 4 is a perspective view of a cigarette lighter plug equipped with a conventional microphone unit.

FIG. 5 is a perspective view showing a conventional method of fixing a microphone unit.

[Explanation of symbols]

 1 Microphone unit for transmitting voice input 2 Speaker unit for receiving voice output 3 Suppression circuit unit 4 Wireless telephone device body 6 Cigar writer socket 7 Cigar writer plug 20 Microphone support member 21 Microphone unit for transmitting voice input

Claims (1)

[Claims] 1. A cigarette lighter plug is inserted into a cigarette lighter socket provided near the front of a driver's seat in a vehicle, and the cigarette lighter plug supplies power to a wireless telephone device body installed in the vehicle through a cable, A microphone unit for transmitting voice input in the cigarette lighter plug, and a speaker unit for receiving voice output in the main body of the wireless telephone device and a wireless telephone device provided with a circuit unit for suppressing acoustic coupling between the microphone unit and the speaker unit, A wireless telephone device in which a microphone unit provided in the cigarette lighter plug is supported by a microphone supporting member having a vibration damping effect.