JP2001156901A - Hands-free telephony equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hands-free telephony equipment, with which a portable telephone set mounted on a main body can be easily used close to a driver and operation far incoming or transmitting can be easily performed on a driver's seat. SOLUTION: Concerning this hands-free telephony equipment, a power source plug 4 attached at the lower end of a flexible rod part 3 is inserted into a cigar lighter receptacle 15 close to the driver's seat of an automobile, a general portable telephone set 20 is loaded on a holder part 2 provided on the front of a main body 1, and a connecting plug 13 drawn from the main body 1 is inserted and connected to an external speaker/microphone terminal holding part 21 of the portable telephone set 20. The portable telephone set 20 on the main body 1 can be easily used close to a driver by bending the flexible rod part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a vehicle,
The present invention relates to a hands-free telephone device used by mounting a general-purpose mobile phone.

[0002]

2. Description of the Related Art In recent years, there has been a remarkable spread of portable telephones, and portable telephones are frequently used even in automobiles. If a driver uses a mobile phone while driving a car, the driver must hold the mobile phone with one hand and hold the steering wheel with one hand, causing a danger of a traffic accident. There has been a need for a usable hands-free telephone device.

[0003]

Therefore, conventionally, a simple holder for a mobile phone is provided near the driver's seat of an automobile, and a small earphone is attached to an external speaker / microphone terminal of the mobile phone held by the simple holder. -Instruments have been developed that can be used by inserting the connector of the microphone unit. When a driver uses a telephone, the driver places it in a simple holder, attaches a small earphone / microphone unit to the head, plugs the connector into the external terminal of the telephone, and holds the mobile phone by hand. Make a call without.

However, in such a device using an earphone / microphone unit, a lead wire is connected between the portable telephone and the earphone / microphone unit, and this lead wire passes around the driver's body. Therefore, for a driver who operates the steering wheel by moving both hands, such a lead wire becomes a considerable obstacle, and there is a problem that the lead wire is hooked by hand.

On the other hand, there has been proposed a hands-free telephone device which can be used in a driver's seat in a car by mounting a portable telephone. In this hands-free telephone device, the device main body is held on or near a cup holder on a lid of a console box next to a driver's seat, and a mobile phone is mounted on the device main body, and connected to an external speaker / external microphone terminal of the mobile phone. Used by connecting the internal circuit of the telephone device.

[0006] However, this hands-free telephone device is mounted at a relatively low position beside the driver, and the external microphone is located at that position. If it is difficult to enter the microphone and the amplification level of the audio signal is increased,
There is a problem that howling easily occurs. Also, when operating a mobile phone at the time of receiving or transmitting a call, it is necessary to operate the mobile phone sideways because the telephone device is located at a low position near the driver's seat and is low. However, there was a problem that it was difficult to see and operation was difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and enables a portable telephone mounted on a main body to be easily brought close to a driver and used, and the operation at the time of an incoming call or transmission can be performed. It is an object of the present invention to provide a hands-free telephone device that can be easily performed at a seat.

[0008]

In order to achieve the above-mentioned object, a hands-free telephone device according to the present invention is a hands-free telephone device in which a portable telephone is mounted on a holder provided on a front surface of a main body. , A flexible rod fixed to the bottom of the body, attached to the lower end of the flexible rod,
A power plug that can be plugged into and connected to a car's cigarette lighter socket, an external speaker provided in a part of the main body, an external microphone provided in a part of the main body, and operates by receiving power from the power plug And operates by receiving a power supply from a power plug and a reception voice amplifier built in the main body for amplifying a reception voice signal from a mobile phone,
A reception audio amplifier built in the main body for amplifying a transmission audio signal from an external microphone, and an echo cancellation circuit built in the main body for preventing howling caused by overlapping loop amplification of the reception audio signal and the transmission audio signal A connection plug that is connected to the circuit in the main body, pulled out from the main body, and inserted into and connected to an external speaker / microphone terminal receiving portion of the mobile phone.

[0009]

In the hands-free telephone device having such a configuration, the power plug attached to the lower end of the flexible rod portion is inserted into a cigarette lighter socket near the driver's seat of the automobile, and the general-purpose mobile phone is mounted on the front of the main body. The connection plug, which is attached to the provided holder and pulled out from the main body, is inserted into and connected to the external speaker / microphone terminal receiving portion of the mobile phone for use.

When the driver uses the mobile phone, if the user holds the main body and pulls it toward the driver's seat, the flexible rod portion bends appropriately and the mobile phone on the main body is easily brought close to the driver. In this state, the user operates the operation buttons of the mobile phone to perform a transmission or an incoming call. The voice signal from the other party received by the mobile phone is amplified by the receiving voice amplifier via the echo canceling circuit, and transmitted to the user through the external speaker.

The user's voice is converted into a voice signal through an external microphone, amplified by a transmission voice amplifier through an echo cancellation circuit, input to a mobile phone, transmitted to a wireless base station through a wireless communication unit of the mobile phone, and relayed therefrom. It is sent to the other party's telephone through an exchange or the like. When leaving the car, the connection plug can be pulled out from the external speaker / microphone terminal receiving portion of the mobile phone, and the mobile phone can be easily removed from the holder portion of the mobile phone and carried.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the hands-free telephone device. Reference numeral 1 denotes a main body of the telephone device, and a holder 2 for holding a mobile phone 20 is formed at a front portion of the main body 1 formed in a vertically long shape. Holder part 2
On both sides, holding portions for holding with spring elasticity are provided on both sides so as to be sandwiched from both sides, and the mobile phone 20 is inserted from above and held by the holder portion 2.

A flexible rod portion 3 is attached to the bottom of the main body 1, and a power plug 4 for a cigarette lighter is attached to a lower portion of the flexible rod portion 3. That is, the flexible rod 3 is rotatably or fixedly mounted on the power plug 4 for the cigarette lighter, and the main body 1 is fixed on the flexible rod 3.

An external speaker 5 is provided on the upper front surface of the main body 1, and an external microphone 6 is provided on the lower left side of the front surface of the main body 1. Also, a circuit for hands-free communication as shown in FIG. 5, that is, a transmission audio amplifier 7, a reception audio amplifier 8, and an echo cancellation circuit 9 are built in the main body 1. The power source of these circuits is a vehicle power source, that is, a vehicle battery. For this purpose, a cigarette lighter power plug 4 that can be inserted into a cigarette lighter socket in the vehicle is used. A power cable 11 from the power plug 4 It is connected to a circuit in the main body 1 through the inside of the flexible rod portion 3. A power switch 12 for turning the power on and off is provided on the lower side of the main body 1.

The echo canceling circuit 9 detects an incoming voice level and a transmitting voice level, and attenuates any of the levels by an attenuator to output a voice signal. Connect the adaptive filter between the receiving voice circuit and the transmitting voice circuit, connect the adaptive filter to the adaptive filter, and update the coefficients of the adaptive filter with the output of the adaptive control algorithm circuit. Or a device that operates so as to cancel the received audio signal in the transmitted audio signal, or connects an audio mute circuit to the transmitted audio circuit, and shuts off the audio output from the microphone when the received audio is output from the speaker. Things can be used.

As shown in FIG. 5, a connection plug 13 having three terminals is connected to a transmission audio output circuit and a reception audio input circuit via lead wires. The connection plug 13 is pulled out from the side of the main body 1 as shown in FIG.
Is inserted and connected to an external speaker (earphone) / microphone terminal receiving section of the mobile phone 20 mounted on the holder section 2.

The flexible rod portion 3 is constructed by attaching a band-shaped metal plate 3b as a core material inside a bellows hose 3a made of synthetic resin. The metal plate 3b has such a rigidity that it can be easily bent by hand in the direction of its thickness.
A large number of holes are arranged in the longitudinal direction so that they can be easily plastically deformed in the thickness direction. As the bellows hose 3a, a soft and flexible corrugated hose such as vinyl chloride can be used, and a circular base plate 3c is fixed to the lower end of the bellows hose 3a so as to close, and a metal base is placed on the base plate 3c. Board 3
The lower part of b is fixed. The upper ends of the bellows hose 3a and the metal plate 3b are fixed to the bottom of the main body 1. The front surface of the main body 1 is arranged so as to be parallel to the plane of the metal plate 3b.

Since such a flexible rod portion 3 can be composed of a bellows hose 3a and a metal plate 3b,
It can be manufactured very cheaply. Also, the metal plate 3b
Can be bent only in two front and rear directions, but in use, the flexible rod portion 3 only needs to bend in a direction approaching the driver, and the direction of the driver, that is, the bending direction is When plugging the power plug 4 into the cigarette lighter socket, it can be determined arbitrarily.
There is no problem if you turn in the direction.

A power plug 4 for cigarette lighter is fixed to the bottom of the base plate 3c. The power plug 4 is formed so as to be insertable into a cigarette lighter socket provided in the interior of the vehicle, and the terminals of the positive electrode 4a and the negative electrode 4b are provided so as to protrude. Although the power plug 4 is fixed to the base plate 3c, it can be rotatably mounted around its central axis. By making the power plug 4 rotatable, the power plug 4 is inserted into a cigarette lighter socket and becomes flexible. By turning the sex rod portion 3 around its axis, the front of the main body 1, that is, the mobile phone can be easily turned to an arbitrary side.

The hands-free telephone device thus constructed is used in a car, and the power plug 4 at the lower end of the flexible rod 3 is connected to a console box or the like beside the driver's seat as shown in FIG. Into the cigarette lighter socket 15 provided in the. At this time, the direction of the front of the main body 1 is set to the driver side. With this insertion, the power plug 4
The positive electrode 4a and the negative electrode 4b are connected to the power supply of the vehicle, and the circuit of the telephone device in the main body 1 can be energized via the power switch 12.

Then, the general-purpose mobile phone 20 is mounted on the holder 2 on the front of the main body 1. The mobile phone 20 is sandwiched by the sandwiching portion of the holder 2 so as to sandwich it from both sides.
It can be easily and stably mounted. And the main body 1
The connection plug 13 pulled out to the side of the mobile phone 20
To the external speaker / microphone terminal receiving section 21 of FIG. Thus, the transmission audio circuit in the main body 1 is
, And the receiving audio circuit in the main body 1 is connected to the external microphone terminal on the mobile phone 20 side.

When the driver uses the mobile phone, that is, when transmitting from the mobile phone, or when the mobile phone receives an incoming call, if the driver pulls the body 1 toward the driver's seat, a flexible rod is provided. The part 3 is appropriately bent, and the mobile phone 20 on the main body 1 can be easily brought close to the driver,
In this state, the user operates the operation buttons of the mobile phone 20 to perform transmission or reception, and at the same time, turns on the power switch 12 of the telephone device to operate the hands-free communication circuit. As a result, the voice signal from the other party received by the mobile phone 20 is amplified by the receiving voice amplifier 8 via the echo canceling circuit 9 and transmitted to the user through the external speaker 5.

On the other hand, the voice of the user is converted into a voice signal through the external microphone 6 and is transmitted to the echo cancel circuit 9.
Is amplified by the transmission audio amplifier 7 through the
Is sent to the wireless base station through the wireless communication unit of the mobile phone 20, and then sent to the other party's telephone through a relay exchange or the like. When the call ends, the mobile phone 2
By operating the operation button 0, the line is cut off and the power switch 12 of the telephone device is turned off. When leaving the car, the connection plug 13 is pulled out of the external speaker / microphone terminal receiving portion of the mobile phone 20 and the holder portion 2 of the main body 1 is removed.
, The mobile phone 20 can be easily removed and carried.

[0024]

As described above, according to the hands-free telephone device of the present invention, the power plug at the lower end of the flexible rod portion is simply inserted into the cigarette lighter socket disposed near the driver's seat of the automobile. The mobile phone attached to the holder on the front surface of the main body on the flexible rod can be easily used near the driver by bending the flexible rod. In addition, the operation at the time of incoming call or transmission can be easily performed in the driver's seat. Furthermore, by simply inserting the power plug for the cigarette lighter at the lower end of the flexible rod into a cigarette lighter socket arranged near the driver's seat of the car, the power connection of the device is completed,
Since power is supplied from the power supply battery of the vehicle, the built-in battery in the main body can be eliminated. Furthermore, since the flexible rod portion can be configured by disposing a metal plate in a bellows hose, it can be manufactured at very low cost.

[Brief description of the drawings]

FIG. 1 is a front view of a hands-free telephone device according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of a lower part of the telephone device.

FIG. 3 is a partial sectional view of an upper part of the telephone device.

FIG. 4 is a perspective view showing a use state of the telephone device.

FIG. 5 is a block diagram showing a circuit configuration of the telephone device.

[Explanation of symbols]

 Reference Signs List 1-Main unit 2-Holder part 3-Flexible rod part 4-Power plug 5-External speaker 6-External microphone 7-Transmission audio amplifier 8-Reception audio amplifier 9-Echo cancellation circuit 13-Connection plug 15-Cigar lighter socket 20-Mobile Phone 21-External Speaker / Microphone Terminal Receiver

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04M 1/21 H04M 1/60 C 1/60 H04B 7/26 109G

Claims (2)

[Claims] 1. A hands-free telephone device in which a mobile phone is mounted on a holder provided on a front surface of a main body and used, wherein: a flexible rod portion fixed to a bottom portion of the main body; A power plug attached to the lower end of the unit and pluggable and connectable to a cigarette lighter socket of an automobile; an external speaker disposed on a part of the main body; an external microphone disposed on a part of the main body; A receiving audio amplifier built in the main body that operates by receiving power supply from a power plug and amplifies a voice signal received from the mobile phone; and an external microphone that operates by receiving power supply from the power plug. A receiving audio amplifier built in the main body for amplifying a transmitting audio signal from the apparatus; and a howling preventing a howling caused by overlapping loop amplification of the receiving audio signal and the transmitting audio signal. An echo canceling circuit built in the body, and a connection plug connected to the circuit in the main body, pulled out from the main body, and inserted into and connected to an external speaker / microphone terminal receiving portion of the mobile phone. Features a hands-free telephone device. 2. The hands-free telephone according to claim 1, wherein the flexible rod portion is formed by fitting a bellows hose made of a synthetic resin around an outer peripheral portion of a metal plate serving as a core material. apparatus.