JPH0670351U - Mobile phone hands-free unit structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a hands-free unit structure of a mobile phone in which a microphone on the hands-free unit side is built in the middle of a cable connecting the mobile phone and the hands-free unit. [Structure] A microphone 14 on the hands-free unit 12 side, which is connected to a mobile phone 11 via a cable 13, is installed in the middle of one cable 13 connecting the mobile phone 11 and the hands-free unit 12. It is characterized by having done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hands-free unit structure for a mobile phone, and in particular, it has a microphone built in between cables connecting the mobile phone and the hands-free unit.

[0002]

[Prior art]

 In general, mobile phones have become so popular that they can be used in various places, and it becomes possible to answer calls while driving a car or while working. However, when using a mobile phone in a car, etc., it is difficult for the driver to talk while driving due to traffic safety issues, and the need for a hands-free unit is strongly desired. It is rare.

Therefore, in recent years, various forms of hands-free units have been proposed. For example, as shown in FIG. 2, input / output of a mobile phone 11 and a hands-free unit 12 having a microphone 12a and a speaker 12b built therein. A cable 13 is connected between the terminals, and a power switch of the handsfree unit 12 is turned on to start a call, or as shown in FIG. 3, a mobile phone 11 and a speaker 12b are incorporated. It is known that the hands-free unit 12 is connected to the hands-free unit 12 via a cable 13 and the dedicated microphone 14 is connected to the hands-free unit 12 via a microphone-dedicated cable 15.

[0004]

[Problems to be solved by the device]

 However, in the hands-free unit of the conventional structure in which the microphone 12a and the speaker 12b are built in the housing of the hands-free unit 12, howling occurs due to mechanical acoustic coupling as the hands-free unit 12 becomes smaller. There was a problem that it was easy to make calls and there was a lot of noise, and it was not possible to make calls with good sound quality. In addition, in the case where the microphone 14 is connected to the hands-free unit 12 by the cable 15 for exclusive use of the microphone, two cables are required, the cable routing becomes complicated, and the position where the microphone 14 is installed has a problem. was there.

An object of the present invention is to solve the above-mentioned problems of the conventional structure. A hands-free unit side microphone is built in the middle of a cable connecting a mobile phone and a hands-free unit. To obtain a hands-free unit structure for mobile phones.

[0006]

[Means for Solving the Problems]

 In order to solve such a problem, in the present invention, a microphone on the handsfree unit side, which is connected to a mobile phone via a cable, is installed in the middle of one cable connecting the mobile phone and the handsfree unit. It is characterized by being configured to do so.

[0007]

[Action]

 Based on such a configuration, in the handsfree unit structure of the mobile phone according to the present invention, the microphone for the handsfree unit side is built in the middle of the cable connecting the mobile phone and the handsfree unit. Howling with the speaker can be eliminated, and cable routing can be simplified, and hands-free operation can be performed by only operating the mobile phone when talking.

[0008]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing a hands-free unit structure of a mobile phone according to the present invention. In the figure, the same parts corresponding to those of the conventional structure are designated by the same reference numerals and described. First, the hands-free unit 12, which is used by connecting to the mobile phone 11, has a speaker 12b built therein. Further, a microphone 14 on the handsfree unit 12 side is connected in the middle of one cable 13 connected to the mobile phone 11. Here, the microphone 14 is composed of a condenser microphone or the like, and can be installed at an appropriate position without any trouble in communication.

On the other hand, the mobile phone 11 has an earphone microphone terminal (not shown) and is connected to an internal circuit via a capacitor or the like. The configuration operation of the mobile phone itself is publicly known. Not detailed.

The hands-free unit 12 has an input / output terminal into which the plug of the connection cable 13 is inserted, and is internally provided with a processing circuit connected via a capacitor (not shown), a power supply, and a control switch. Has been. The speaker 12b and the microphone 14 are connected to the internal processing circuit, and the microphone 14 provided separately from the handsfree unit 12 is connected via a cable 13.

In such a configuration, when the plugs at both ends of the cable 13 are connected to the earphone microphone terminal of the mobile phone 11 and the input / output terminals of the handsfree unit 12, respectively, when the mobile phone 11 is put into use. A DC bias appears at the input / output terminals of the hands-free unit 12 and activates the control switch and the power switch, so that the hands-free unit 12 is maintained in the operating state. When the mobile phone 11 is not used or is in the standby mode, the DC bias does not appear at the input / output terminals, and as a result, the control switch and the power switch are opened and the hands-free unit 12 is deactivated.

Further, the microphone 14 on the handsfree unit 12 side is installed in the middle of the cable 13 connecting the mobile phone 11 and the handsfree unit 12, and the microphone 14 is attached at an appropriate position. Howling with the speaker 12b is eliminated, and a call with good sound quality is possible.

[0014]

[Effect of device]

 As described above, according to the hands-free unit structure of the mobile phone according to the present invention, the microphone of the hands-free unit side connected to the mobile phone via the cable is connected to the mobile phone and the hands-free unit. Since it is configured to be installed in the middle of a single cable, howling due to mechanical acoustic coupling with the microphone of the speaker on the handsfree unit side is eliminated, the wiring of the cable is simplified, and at the time of a call, Hands-free operation is possible only with the mobile phone side.

[Brief description of drawings]

FIG. 1 is a schematic view showing a hands-free unit structure of a mobile phone according to the present invention.

FIG. 2 is a schematic view showing a structure of a conventional hands-free unit for a mobile phone.

FIG. 3 is a schematic view showing another conventional hands-free unit structure for a mobile phone.

[Explanation of symbols]

 11 Mobile phone 12 Hands-free unit 13 Cable 14 Microphone

Claims (1)

[Scope of utility model registration request] 1. A microphone for a hands-free unit, which is connected to a mobile phone via a cable, is arranged in the middle of one cable connecting the mobile phone and the hands-free unit. Hands-free unit structure for mobile phones.