JPH10190816A - On-vehicle hands-free unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce number of wires and to improve safety driving. SOLUTION: This unit is fitted to a sun visor 31 placed to an upper front part of a driver's seat and composed of a portable telephone set holder 42, a microphone 43, a speaker 44, a dial key 46, a means that reads dial numbers stored in the portable telephone set as abbreviated dials, a control main body 32 that connects these elements, so as to make hands-free speech through the portable telephone set and a means that connects this control main body to a power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle hands-free unit, and more particularly to an in-vehicle hands-free unit in which an automobile telephone or a portable telephone used in an automobile can be used hands-free.

[0002]

2. Description of the Related Art Recently, traffic accidents due to the use of a mobile phone or a mobile phone (hereinafter referred to as a mobile phone) in a car have been increasing, so that hands-free communication is possible without holding a mobile phone by hand. Various types have been proposed. FIG. 3 shows a typical hands-free type, which is provided with a control unit 12 for connecting and arranging a mobile phone 11 between a driver's seat and a passenger seat. The control unit 12 is connected to the control unit 12 via a connection cable 13. The in-vehicle antenna 14 is connected, and the connection cable 1
A hands-free microphone 18 is connected to a sun visor 17 arranged at an upper front part of the driver's seat via the cable 6. Then, the control unit 12 is inserted into a cigar lighter or the like via the connection cable 20 to obtain electric power.

[0003]

However, in such a configuration, since each component constituting the hands-free device is arranged at a position distant from the control unit 12, a large number of wiring operations are difficult. Also, in such a configuration,
Since the hands-free device is not provided with a calling input unit for making a call, the calling operation is carried out by holding the mobile phone itself when making a call, which is not preferable in terms of safe driving.

[0004]

According to the present invention, to solve such a problem, a portable telephone holder and a microphone can be attached to a sun visor disposed in the upper front of a driver's seat. , A speaker, means for reading out a calling number stored in the mobile phone as a dial key and abbreviated dial, and a control body for connecting these elements to enable hands-free communication via the mobile phone. A hands-free unit is provided.

[0005]

FIG. 1 shows an embodiment of a hands-free unit for a vehicle according to the present invention, in which a hands-free unit 30 for a vehicle is disposed in the upper front of a driver's seat. One control body 32 and a connection cable 3
4 and an connection cable 36 connected to a power source such as a cigarette lighter.

The control body 32 incorporates various control circuits and various components integrally so that the portable telephone 41 can be used in a hands-free state. That is, the control main body 32 includes a mobile phone holder 42 into which the mobile phone 41 can be inserted and fixed, a microphone 43 for collecting the voice of the driver, a speaker 44 for emitting the voice received by the mobile phone 41, and a microphone 43. A volume 45 for adjusting the volume collected by the speaker and / or the volume emitted from the speaker, a dial key 46 for reading out information stored in the mobile phone and performing a dial operation,
It is composed of a transmission key 47 and a display section 48 for performing display necessary for various control operations. This display section 48
Is used to display a calling number, a registered name, and the like stored in the mobile phone, and clarifies the calling number when dialing. FIG. 1 shows numeral keys 1 to 0, a memory key,
An input key unit is provided which receives signals from control keys such as a start key, an end key, and an arrow key to perform setting and control operations necessary for various hands-free operations.

[0007] According to this configuration, since the transmission input section such as a dial (memory) key and the like are arranged intensively in the upper front part of the driver's seat of the automobile, the power supply wiring and the antenna wiring are provided. It is possible to use a minimum number of wirings, and it is not necessary to perform a large number of wiring connections as in the related art. By doing so, the number of wiring components can be reduced, which can contribute to the cost reduction of the entire unit.

Further, since the outgoing key for making a call is incorporated in the control body instead of the mobile phone, it is easy to operate the key of the control body 32 attached to the sun visor attached to the sun visor while looking forward. A call can be made. For this reason, the operation of the conventional mobile phone is not required.

Further, according to this structure, since the operation keys required for telephone operation are arranged a thousand steps above the driver's seat, even when making a call, the operation can be performed while confirming the front of the car. Yes, higher security than before can be ensured.

FIG. 2 shows an example of a circuit configuration of the control main body 32. In FIG. 2, the portable telephone 41 is attached to a telephone holder 42 (see FIG. 1), and is connected to a power supply circuit / charging circuit 51. Connected and receive power.

The portable telephone 41 has an interface circuit 52, a CODEC (A / D / D / A conversion circuit) 53, an echo canceller 54, and a CODEC (A /
D / D / A conversion circuit) 55 in this order, and a sound signal at the time of the incoming call is supplied to a speaker amplifier / filter circuit 56 connected to the output side of the CODEC (A / D / D / A conversion circuit) 55. From the speaker 44 via
The audio signal from the microphone 43 is sent to the D / A conversion circuit 55 via the microphone amplifier / filter circuit 57.

Further, the telephone body 32 is connected to a system control circuit 61 composed of a microcomputer via a communication interface control circuit 60, and the system control circuit 61
Is connected to an LCD display 63 via an LCD drive circuit 62 to display a telephone number or other information or control information. Further, the system control circuit 61
Numeric keys 64a, memory key 64b, start key 6
4c, an end key 64d, an arrow key 65e, and the like, are configured to perform a control operation necessary for various hands-free operations in response to signals from the control keys. The system control circuit 61 is also connected to a memory 66 such as a ROM and a RAM to store control sequence software.

The configuration and operation of each part of the control body 32 having such a configuration are well-known and will not be described in detail here.

[0014]

As described above, the use of the hands-free unit for mounting on a vehicle according to the present invention is concentrated on the front upper portion of the driver's seat including the transmission input section, so that a minimum Wiring may be used, and it is not necessary to perform many wiring connections as in the related art.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a vehicle-mounted hands-free unit according to the present invention.

FIG. 2 is a system diagram showing a specific example of the control main body shown in FIG. 1;

FIG. 3 is a configuration diagram of a conventional typical hands-free unit.

[Explanation of symbols]

 11, 41 ... mobile phone 12 ... control unit 13, 16, 20, 34, 36 ... connection cable 14, 35 ... in-vehicle antenna 17, 31 ... sun visor 18, 43 ...・ Hands-free microphone 30 ・ ・ ・ Car-mounted hands-free unit 32 ・ ・ ・ Control body 42 ・ ・ ・ Cellular phone holder 44 ・ ・ ・ Speaker 45 ・ ・ ・ Volume 46 ・ ・ ・ Dial memory key 47 for setting and storing calling number ··· Incoming / sending key 48 ··· Display unit 52 ··· Interface circuit 53 ··· CODEC (A / D / D / A conversion circuit) 54 ··· Echo canceller 55 ··· CODEC (A / D・ D / A conversion circuit) 56 ・ ・ ・ Speaker amplifier / filter circuit 57 ・ ・ ・ Microphone amplifier / filter circuit 60 ・ ・ ・ Communication interface Control circuit 61 ・ ・ ・ System control circuit 62 ・ ・ ・ LCD drive circuit 63 ・ ・ ・ LCD display 64a ・ ・ ・ 1-0 numeric keys 64b ・ ・ ・ Memory key 64c ・ ・ ・ Start key 64d ・ ・ ・End key 65e Arrow key 66 Memory such as ROM and RAM

Claims (3)

[Claims] 1. A mobile phone holder, which can be attached to a sun visor disposed in the upper front of a driver's seat.
A microphone, a speaker, means for reading out a calling number stored in the mobile phone as a dial key and abbreviated dialing, a control body for connecting these elements to enable hands-free communication via the mobile phone, Means for connecting the control body to a power source. 2. The in-vehicle hands-free unit according to claim 1, wherein an antenna is connected to the control body via a connection cable. 3. The in-vehicle hands-free unit according to claim 1, wherein the control body is attached to the sun visor so that the control body can be operated without using the sun visor.