KR200204514Y1 - communication assistance hand-free apparatus for wireless communication system which is available for earphone type and car type - Google Patents

Abstract

The present invention discloses a hands-free device for call assistance of a mobile communication terminal that can be used as an earphone type and a vehicle type. The hands-free device of the present invention includes an audio signal line, a microphone signal line, and a ground line connected to an earphone jack of a mobile communication terminal through a speaker terminal and a microphone unit, and a plug terminal connected to each end of the speaker unit and the microphone unit. And a speaker microphone unit configured to adjust the opening and closing of the audio signal line according to the mounting state, a holder for mounting the mobile communication terminal and the speaker, and an amplification circuit unit for amplifying the output audio signal of the mobile communication terminal. When the hands-free device simultaneously mounts the mobile communication terminal and the speaker on the cradle, the hands-free device amplifies the output signal of the mobile communication terminal by the amplifying circuit unit and provides the same to the speaker unit. When separated from the cradle, the output audio signal of the mobile communication terminal is provided to the speaker unit as it is.

Description

Communication assistance hand-free apparatus for wireless communication system which can be used as earphone type and vehicle type which is available for earphone type and car type}

The present invention relates to a hands-free device for supporting a call without a user's hand by mounting a mobile communication terminal such as a cellular phone, a PCS phone, an IMT-2000, or the like, and more specifically, a mobile device. The present invention relates to a multi-functional hands-free device that can be used as an earphone-type hands-free device in a state of being separated from the cradle as well as a vehicle-type hands-free device which can be used by mounting a communication terminal and a speaker on a holder.

While driving a vehicle, it is often necessary to make a call using a mobile communication terminal. In this case, making a call with a mobile communication terminal by hand without using another call assistance device increases the risk of causing a traffic accident. Therefore, in order to enable safe communication while driving, so-called hands-free devices for assisting the call without having to directly hold the mobile communication terminal have been commercialized in various ways.

Early models of hands-free devices mainly followed the method of forming the interface through the connection terminal provided at the bottom of the mobile communication terminal. However, the connection terminal does not have the same signal configuration or layout of terminals for each manufacturer of the mobile communication terminal. Therefore, the existing hands-free device has a lot of restrictions in the applicability of each type of mobile communication terminal.

In order to overcome this problem, recently, hands-free devices have been introduced to form an interface through the earphone jack 120 of the mobile communication terminal. The present invention also follows this manner.

There are a wide variety of hands-free devices known in the art. Among them, a hands-free device having a simple configuration may include an in-ear earphone type hands-free device. This device is a hands-free device configured to listen to audio signals and place microphones near the mouth through a plug that is connected to the earphone jack of the mobile communication terminal. The hands free device does not have a stand for the mobile communication terminal. Therefore, the use space is not necessarily limited to the vehicle, but is integrally formed with a necklace, for example, so that the user can make a phone call in a hands-free manner by putting the earphone on his or her ear. However, this hands-free device has various inconveniences when the vehicle is being driven because the earphone must always be plugged into the ear to make a call. In other words, you should always put your earphones in your ears while driving or when you receive a signal, the former is not inconvenient from the driver's point of view, and the latter will prevent you from driving safely. do.

Another kind is a vehicle-type hands-free device. The vehicle-type hands-free device is basically provided with a cradle for fixedly mounting a mobile communication terminal. The cradle is installed in the proper position in the vehicle. The cradle is equipped with a microphone and a speaker, and the user makes a call at a distance from the microphone and the speaker. There is even a more complex vehicle-type hands-free device with charging capability. However, the vehicle-type hands-free device is not portable due to the volume of the cradle and because the speaker or microphone is formed integrally with the cradle, it cannot be used as a portable hands-free device and is used only for a vehicle.

In order to solve the conventional problems as described above, the present invention is not only as a vehicle hands-free device that can be used by mounting the mobile communication terminal and the speaker to the cradle, but also can be used as an earphone-type hands-free while carrying it separately from the cradle while saving power. It is an object of the present invention to provide a multi-functional hands-free device having a.

1 shows a schematic circuit configuration of a hands free device of the present invention.

2 shows a detailed circuit configuration of the hands free device of the present invention.

Figure 3 is a perspective view showing the external configuration of the cradle of the hands-free device of the present invention.

4 is an actual use state diagram equipped with a mobile communication terminal in the hands-free device of the present invention.

5A, 5B, and 5C show a side cross-sectional view, a front view, and a rear view, respectively, of a wire type speaker portion, and FIG. 5D is a side cross-sectional view of a boom type speaker portion.

<Description of the symbols for the main parts of the drawings>

10: amplification unit 20: speaker unit

30: power supply portion 40: plug portion

50: amplification circuit unit 60: speaker microphone unit

100: mobile communication terminal 120: earphone jack

200: holder 210: mobile communication terminal holder

230: LED 240: grill holder

220: speaker mounting portion 330: microphone

350: speaker

In order to achieve the above object, the present invention

And a speaker, a microphone, and an audio signal line, a microphone signal line, and a ground line connected to the earphone jack of the mobile communication terminal through a plug terminal connected to each of the speaker unit and the microphone unit. A speaker-microphone unit configured to adjust an opening;

A cradle for mounting a mobile terminal and a speaker, respectively; And

An amplification circuit unit for amplifying the output audio signal of the mobile communication terminal,

When the mobile communication terminal and the speaker are mounted on the holder at the same time, the output signal of the mobile communication terminal is amplified by the amplifying circuit unit and provided to the speaker unit, and the mobile communication terminal and the speaker unit are separated from the holder. In one case, a hands-free device is provided, wherein the output audio signal of the mobile communication terminal is provided to the speaker unit as it is.

Preferably, the speaker has a structure in which the speaker is built into the cover part formed integrally with the first cover having a diameter that can be inserted into the ear and the second cover having a larger diameter than the first cover in a direction opposite to each other. Has

In addition, as a preferable configuration example of the speaker-microphone unit, the second microphone signal terminal, the second audio signal terminal for connecting the first microphone signal terminal, the first audio signal terminal and the first ground terminal of the earphone jack of the mobile communication terminal, respectively A signal terminal and a second ground terminal, wherein the second microphone signal terminal, the second audio signal terminal, and the second ground terminal are connected to ends of the microphone signal line, the audio signal line, and the ground line, respectively; A speaker unit for converting and outputting an audio signal transmitted from a mobile communication terminal into voice, a microphone unit for converting an audio signal into an audio signal and providing the audio signal to the mobile communication terminal; A switch unit S4 for intermittent input to the speaker unit and two conductive terminals, one of which is the second A first connection terminal S1b connected to the audio signal line 45a between the audio signal terminal 40a and one terminal of the switch unit S4 and the other grounded, and two conductive terminals, One has a second connection terminal S2b connected to an audio signal line between an input end of the speaker unit and the other end of the switch unit S4 and the other grounded.

Furthermore, as a preferable configuration example of the amplifying circuit unit, an amplifying unit for amplifying an output audio signal of the mobile communication terminal using a power supply unit and the power supply unit as a driving power source, and located between the power supply unit and the amplifying unit, It is closed only when the mobile communication terminal and the speaker are mounted at the same time, and is connected to a switching unit S3 for supplying power to the amplifying unit, and connected to the input terminal and the output terminal of the amplifying unit, and the speaker mounted on the cradle. In this case, the third connection terminal S1a and the fourth connection terminal S1b and the fourth connection terminal S1b are connected to the second connection terminal S2b to provide the audio signal of the mobile communication terminal to the speaker unit via the amplification unit. It has the structure provided with connection terminal S2a.

The microphone portion is a wire-type microphone disposed on a wire shell connecting the plug portion and the speaker portion, or in another form, a wire shell separate from the wire shell connecting the plug portion and the speaker portion, between the ear portion and the mouth. It extends by the length of but is connected to the end of the wire sheath having shape retention and flexibility at the same time, it is preferable to constitute a boom type (boom type) microphone.

Other features and advantages of the present invention will become more apparent with reference to the following detailed description and accompanying drawings that illustrate the features of various embodiments of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to a preferred embodiment of the present invention.

Hands-free device according to the present invention is largely divided into a speaker-microphone unit 60, the cradle 200, and the amplification circuit unit 50.

1 shows a schematic circuit configuration of a hands free device of the present invention, and FIG. 2 shows a detailed circuit configuration of a hands free device of the present invention. 3 is a perspective view showing the external configuration of the holder 200 of the hands-free device of the present invention.

The cradle 200 is installed at a predetermined position in front of the front seat in the interior of the vehicle and is a means for mounting the mobile communication terminal and the speaker, respectively. The cradle 200 is formed of an integrated case having a speaker mounting unit 220 and a terminal mounting unit 210 for mounting the speaker unit 350 and the mobile communication terminal 100, respectively. And the back of this case is provided with the grill holder 240 for fixing to a vehicle. In addition, an LED 230 indicating the state of the power supply unit V is installed outside the case.

The speaker-microphone unit 60 is connected to the earphone jack of the mobile communication terminal through a speaker terminal 350 and a microphone unit 330 and a plug terminal connected to each of the speaker unit 350 and the microphone unit 330 at one end. And an audio signal line 45a, a microphone signal line 45b, and a ground line 45c, and are configured to adjust the opening and closing of the audio signal line according to the mounting state.

More specifically, the speaker-microphone unit 60 includes a plug portion 40, a speaker portion 350, a microphone portion 350, a switch portion S4, a first connection terminal S1b, and a second connection terminal ( S2b).

The plug part 40 is a first microphone signal terminal (not shown), a first audio signal terminal (not shown) and a first ground terminal (not shown) of the earphone jack 120 of the mobile communication terminal 100, respectively; A second microphone signal terminal 40b, a second audio signal terminal 40a and a second ground terminal 40c are provided. The second microphone signal terminal 40b, the second audio signal terminal 40a, and the second ground terminal 40c are terminated with the microphone signal line 45b, the audio signal line 45a, and the ground line 45c, respectively. Connected.

The speaker unit 350 is configured to receive an audio signal transmitted from one side of the input terminal and the other side of the mobile communication terminal and converts the audio signal into voice and outputs the audio signal.

The structure of the speaker unit 350 is shown in FIGS. 5A, 5B, 5C and 5D. 5A, 5B, and 5C show a side cross-sectional view, a front view, and a rear view of a wire type speaker, respectively, and FIG. 5D is a side cross-sectional view of a boom type speaker. Wire type or boom type or speaker unit 350 has a first cover 370 having a small aperture that can be inserted into the ear and a much larger aperture (about 20 mm in diameter) than the first cover 370. The cover 360 has a structure in which the cover 360 is integrally formed while facing in the opposite direction, and the speaker 380 is built in the cover. The speaker 380 is connected to the audio signal line 45a through the switch S4 and also to the audio signal line 45d connected to the connection terminal S2b connected to the amplifying circuit 50.

The switch unit S4 is disposed in the middle of the audio signal line 45a to intermittently input the audio signal transmitted from the mobile communication terminal 100 to the speaker unit 350 by a switching operation. . In particular, the switch unit S4 is formed such that the switch button protrudes from the outer surface of the cover unit of the speaker unit 350. When the speaker unit 350 is mounted on the speaker mounting unit 220 of the holder 200, the speaker unit 350 is opened. As a result, the audio signal is transmitted to the speaker 380 only through the audio signal line 45d.

In addition, the switch button of the switch (S5) for switching the mobile communication terminal to the call start mode is formed to be exposed to the outside of the second cover (360).

The wire type microphone 330 is disposed on the wire shell 332 connecting the plug portion 40 and the speaker portion 350 (see FIG. 5A).

The boom type microphone 340 is a wire sheath separate from the wire sheath 332 connecting the plug portion 40 and the speaker portion 350, and extends from the speaker portion 350 by the length between the ear and the mouth. It is connected to the end of the wire sheath 334 having both retention and flexibility.

The microphones 330 and 340 employ a compact and high performance microphone. When the distance to the caller is within 3m, the voice of the caller can be clearly transmitted to the mobile communication terminal 100.

The first connection terminal S1b and the second connection terminal S2b are formed to be exposed to a predetermined position on the outer surface of the second cover part 360. The third connection terminal S1b and the second connection terminal S2b are installed at a position where the third connection is formed so that the inner surface of the speaker holder 220 is exposed when the speaker unit 350 is mounted on the speaker holder 220. It should be a position where the terminal S1a and the fourth connection terminal S2a can be connected.

In the electrical connection relationship between the first connection terminal S1b and the second connection terminal S2b, the first connection terminal S1b includes two conductive plate-shaped terminals, one of which is the second audio signal terminal. It is connected to the audio signal line 45a between 40a and one terminal of the switch section S4, and the other is grounded. In addition, the second connection terminal S2b also includes two conductive terminals, one of which is connected to an audio signal line between the input terminal of the speaker unit and the other end of the switch unit S4 and the other is grounded.

The microphone 330 has an input port connected to the microphone signal line 45b and the ground line 45c to convert a voice of a user of the mobile communication terminal into an audio signal and provide the audio signal to the mobile communication terminal. In addition, a switch S5 for switching the mobile communication terminal to a call initiation mode is coupled between the microphone signal line 45b and the ground line 45c connected to the input port of the microphone unit 300. Furthermore, a noise canceling circuit composed of a capacitor C4 and a diode D1 connected in parallel is coupled in parallel with the switch S5 between the microphone signal line 45b and the ground line 45c. The noise removing circuit removes the noise included therein before the microphone signal output from the microphone unit 330 is transmitted to the mobile communication terminal 100.

When the amplification circuit unit 50 simultaneously mounts the mobile communication terminal 100 and the speaker unit 350 to the holder 200, amplifies the output audio signal of the mobile communication terminal 100 to provide the speaker unit 350. When the mobile communication terminal 100 and the speaker unit 350 are separated from the cradle 200, the mobile communication terminal 100 and the speaker unit 350 are configured to provide the output audio signal of the mobile communication terminal to the speaker unit.

More specifically, the amplifying circuit unit 50 includes a power supply unit V, an amplifying unit 10, a switching unit S3, a third connection terminal S1a, and a fourth connection terminal S2a.

The amplifier 10 receives the output audio signal of the mobile communication terminal 100 by using the power supply unit V as a driving power and outputs the amplified signal according to a predetermined gain ratio.

The switching unit S3 is positioned between the power supply unit V and the amplification unit 10, and is closed only when the mobile communication terminal and the speaker unit 350 are simultaneously mounted on the holder. Allow power to be supplied to the amplifier 10. Specifically, the switching unit S3 is composed of two switches S3a and S3b connected in series. The switch S3b and the switch S3a are installed to protrude the switch buttons on the outer surfaces of the speaker mounting unit 220 and the terminal mounting unit 210, respectively. Therefore, the switch S3b is closed when the speaker unit 350 is mounted to the speaker mounting unit 220 and is opened when it is removed. In addition, the switch S3a is closed when the mobile communication terminal 100 is mounted on the terminal mounting unit 210 and is opened when it is removed.

The third connection terminal S1a and the fourth connection terminal S2a are respectively connected to the input terminal and the output terminal of the amplifier 10. When the speaker unit 350 is mounted on the speaker mounting unit 220, the third connection terminal S1a is connected to the first connection terminal S1b, and the fourth connection terminal S2a is the second connection terminal. It is connected to (S2b). Therefore, when such a connection is made, the audio signal of the mobile communication terminal 100 is provided to the speaker unit 350 via the amplification unit 10. When the speaker unit 350 is mounted on the speaker mounting unit 220, the switch S4 is opened, so that the audio signal of the mobile communication terminal 100 transmitted to the speaker unit 350 is always an amplifier 10. Is subjected to amplification.

The power supply unit V and the amplification unit 10 are embedded in a case 200, and the third connection terminal S1a and the fourth connection terminal S2a are formed on the inner inner surface of the speaker mounting unit 220. The first connecting terminal (S1b) and the second connecting terminal (S2b) is installed so as to face the exposure.

4 is an actual use state diagram in which a mobile communication terminal is mounted in a hands-free device according to an embodiment of the present invention. As shown in FIG. 4, when the mobile communication terminal 100 is placed on the terminal mounting unit 210 of the holder 200, the switch S3a is closed by the weight of the mobile communication terminal 100. In addition, when the speaker unit 350 of the microphone-speaker unit 60 is mounted on the speaker mounting unit 220 of the holder 200, the switch S3b is closed and at the same time, the switch S4 is opened. In addition, the third connection terminal S1a and the fourth connection terminal S2a are electrically connected to the first connection terminal S1b and the second connection terminal S2b.

In the state in which the mobile communication terminal 100 and the speaker unit 350 are simultaneously mounted on the holder 200 as described above, the power supply unit V is connected to the power supply terminal of the amplifier unit 10 so that the amplifier unit 10 supplies power. The audio signal line 45a is opened and the audio signal of the mobile communication terminal 100 transmitted through the audio signal terminal 40a of the plug 40 is amplified by the connection terminal S1. The amplified signal is amplified and input to the speaker unit 350 through the audio signal line 45d via the connection terminal S2. That is, in a state where the mobile communication terminal 100 and the speaker unit 350 are simultaneously mounted on the holder 200, when the incoming call of the mobile communication terminal 100 rings, the user presses the switch S5 to make a call. After switching, the audio signal of the mobile communication terminal 100 is input to the amplifying unit 10 and amplified and then provided to the speaker unit 350, so that the user can receive a sound even when the user is away from the speaker unit 350 by a certain distance. Being able to listen accurately, the device of the present invention can function as a vehicle hands-free device.

On the other hand, the hands-free device of the present invention can also be used as an earphone-type hands-free for the ear insertion, for this purpose, by removing the mobile communication terminal 100 and the microphone-speaker unit 60 from the cradle 200, it is now a switch (S3a) The and switch S3b is opened, the connection terminal S1 and the connection terminal S2 are also disconnected, and the switch S4 is closed. In such a state, when the ringing tone rings, when the user presses the switch S5 once, the mobile communication terminal 100 is switched to the call mode, and the first cover 370 of the speaker 350 is inserted into the ear so that the call is possible. Become. At this time, the audio signal of the mobile communication terminal 100 that is transmitted through the audio signal terminal 40a of the plug unit 40 is not provided to the amplifying unit 10 and is provided to the speaker unit 350 only through the audio signal line 45a. Is provided. As a result, since the audio signal is provided to the speaker unit 350 without being amplified, a sound having an appropriate intensity can be output for the earphone, so that the hands-free device of the present invention can be used as an earphone-type hands-free device for the ear insertion.

As can be seen from the above description, the hands-free device according to the present invention can be used as a vehicle-type hands-free device by mounting the mobile communication terminal 100 and the speaker unit 35 to the holder 200 and at the same time, the holder 200. It is a hands-free device with a complex function that can be used separately as an earphone-type hands-free device. Conventionally, only hands-free devices functioning as either an earphone type or a vehicle type have a burden of separately purchasing two types of hands-free devices. However, the hands-free device of the present invention can be used as an earphone type or a vehicle type even if only one is purchased, so that the user can obtain a cheap and convenient hands-free device.

In addition, since the power supply unit V is configured to supply power to the amplification unit 10 only when the mobile communication terminal and the speaker unit are mounted on the holder 200 at the same time, for example, the user mistakenly mistakes the microphone-speaker unit 60 and the unit. Except when the mobile communication terminal 100 is left in the state mounted on the cradle at the time, the power supply is cut off even if only one of them comes out, so it is designed to save power to reduce the power consumption of the power supply (V). .

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims You can. Accordingly, all changes that come within the meaning or range of equivalency of the claims are to be embraced within their scope.

Claims (10)

And a speaker, a microphone, and an audio signal line, a microphone signal line, and a ground line connected to the earphone jack of the mobile communication terminal through a plug terminal connected to each of the speaker unit and the microphone unit. A speaker-microphone unit configured to adjust an opening; A cradle for mounting a mobile terminal and a speaker, respectively; And An amplification circuit unit for amplifying the output audio signal of the mobile communication terminal, When the mobile communication terminal and the speaker are mounted on the holder at the same time, the output signal of the mobile communication terminal is amplified by the amplifying circuit unit and provided to the speaker unit, and the mobile communication terminal and the speaker unit are separated from the holder. In one case, the hands-free device characterized by providing the output audio signal of the mobile communication terminal to the speaker unit as it is. The speaker of claim 1, wherein the speaker includes a first cover having an aperture that can be inserted into an ear and a second cover having a larger aperture than the first cover in a direction opposite to each other. Hands free device characterized in that it has a structure. The device of claim 1, wherein the speaker-microphone unit And a second microphone signal terminal, a second audio signal terminal, and a second ground terminal for connecting the first microphone signal terminal, the first audio signal terminal, and the first ground terminal, respectively, of the earphone jack of the mobile communication terminal. A second microphone signal terminal, a second audio signal terminal, and a second ground terminal are connected to ends of the microphone signal line, the audio signal line, and the ground line; A speaker unit for converting an audio signal transmitted from the mobile communication terminal into a voice and outputting the voice; A microphone unit converting a voice into an audio signal and providing the voice signal to the mobile communication terminal; A switch unit (S4) disposed in the middle of the audio signal line for intermittent input of the audio signal to the speaker unit; Two conductive terminals, one of which is connected to an audio signal line 45a between the second audio signal terminal 40a and one terminal of the switch unit S4 and the other of which is grounded (S1b); And It includes two conductive terminals, one of which is connected to the audio signal line between the input terminal of the speaker unit and the other end of the switch unit (S4) and the other has a second connection terminal (S2b) that is grounded Handsfree device. The method of claim 3, wherein the amplifying circuit unit Power supply; An amplifier for amplifying the output audio signal of the mobile communication terminal using the power supply unit as a driving power source; A switching unit (S3) positioned between the power supply unit and the amplification unit and closed only when the mobile communication terminal and the speaker are mounted at the same time so that power of the power supply unit is supplied to the amplification unit; And It is connected to the input terminal and the output terminal of the amplification unit, and when the speaker is mounted on the cradle is connected to the first connection terminal (S1b) and the second connection terminal (S2b), respectively, to amplify the audio signal of the mobile communication terminal And a third connection terminal (S1a) and a fourth connection terminal (S2a) which are provided to the speaker unit via a unit. The method of claim 4, wherein the cradle is formed of an integrated case of the first mounting portion and the second mounting portion for mounting the speaker unit and the mobile communication terminal, respectively, the power supply unit and the amplification unit is embedded in the case, The third connecting terminal S1a and the fourth connecting terminal S2a are installed to face the first connecting terminal S1b and the second connecting terminal S2b on the outer surface of the first mounting part. The switching unit S3 is installed to protrude on the outer surfaces of the first mounting unit and the second mounting unit, respectively, and two switches connected in series on / off are controlled according to whether the speaker unit and the mobile communication terminal are mounted. And S3b). The hands-free device according to claim 4, wherein the switch part (S4) is formed to protrude on an outer surface of the cover part of the speaker part and is switched to an open position when the speaker part is mounted on the first mounting part. The hands-free device according to claim 1, wherein the microphone unit is a wire-type microphone disposed on a wire shell connecting the plug unit and the speaker unit. The wire sheath of claim 1, wherein the microphone is a wire sheath that is separate from the wire sheath connecting the plug and the speaker, and extends from the speaker to a length between the ear and the mouth, and simultaneously has shape retention and flexibility. Hands-free device, characterized in that connected to the end of the boom type (boom type) microphone. The method of claim 1, wherein the speaker-microphone unit further comprises a noise removing circuit comprising a capacitor (C4) and a diode (D1) coupled between the microphone signal line and the ground line connected to the input port of the microphone unit. Handsfree device. The apparatus of claim 1, wherein the speaker-microphone unit is coupled between the microphone signal line and the ground line connected to the input port of the microphone unit, and further includes a switch (S5) for switching the mobile communication terminal to a call initiation mode. Hands-free device, characterized in that.