KR200186229Y1 - Hands-free device for mobile phone with automatic switching feature - Google Patents

Abstract

The present invention discloses a hands free device for a mobile phone. This hands-free device for a mobile telephone comprises a switch means provided between a stereo and a speaker, an electromagnetic receiver on a signal line of the telephone, and a circuit assembly. If no incoming call is made, there is no electromagnetic radiation emitted by the telephone, so the electromagnetic receiver is not activated, and the switch means transmits the music reproduced from the stereo to the speaker and, if an incoming call is made, The electromagnetic wave is radiated by the electromagnetic wave receiver so that the electromagnetic wave receiver receives the electromagnetic wave, the switch means blocks the music transmitted from the stereo, and is instructed by the electromagnetic wave receiver to switch the circuit assembly to allow the incoming call to be played on the speaker. Through this operation, automatic switching between music playback and incoming calls is performed.

Description

Hands-free device for mobile phones with automatic switching {HANDS-FREE DEVICE FOR MOBILE PHONE WITH AUTOMATIC SWITCHING FEATURE}

The present invention relates to a hands-free device, and more particularly to a hands-free for mobile phone that is automatically switched to receive an incoming call.

Recently mobile phones have become popular all over the world. Many drivers also want to use the phone while driving for convenience. As such, various hands-free devices are commercially available. In general, these kits can be subdivided into three forms as described in detail below.

1. Earphone based device. The earphone is connected to the earphone jack of the mobile phone. Such earphone-based devices are similar in shape to conventional earphones, except that they further provide a microphone. Earphones are inserted into the driver's ears, and the microphone is clipped onto the driver's clothing. The quality of the device is poor, the voice is weak, and there is a problem that charging is impossible during use. Therefore, it is not widely used among consumers.

2. Cigar lighter based device. One terminal of this apparatus is connected to a speaker and a microphone which are alternately connected to a cigarette lighter jack, and the other terminal is directly connected to a plug of a mobile telephone. The device has the advantage of being able to charge while in use. This device has a problem of poor voice quality and severe reverberation.

3. Cassette based device. This device is implemented by connecting a signal line of a mobile telephone to a cassette signal line of a car stereo, so that an incoming call can be heard through the speaker of the stereo. However, this device is still unsatisfactory for the following reasons: For example, if the driver is listening to music played on tape or CD when a call comes in, the driver switches the music playback state to an incoming call state. You must press the incoming call button on the phone and then the appropriate stereo button. As a result, the incoming call can be heard through the stereo playback button. In turn, there is a problem in which a series of steps must be executed to distract the driver. Thus, this device is dangerous.

However, there is no conventional automatic switching means between the car stereo 10 and the speaker 12 as shown in FIG. As shown, only the signal line 11 is connected between the stereo 10 and the speaker 12 to send a reproduction music signal to the speaker 12.

Accordingly, it is desirable to provide a hands-free device for a mobile telephone equipped with an automatic switching feature in order to solve the above problems of the prior art.

It is an object of the present invention to provide a hands-free for mobile telephone with an automatic switching feature, whereby the quality is good because the audio is reproduced through the stereo speakers.

As a feature of the present invention, the state of a mobile phone can be detected. Normally, music played through a speaker is stopped when an incoming call is detected. Instead, an incoming call is heard through the speaker.

Switch means are provided between the car stereo and the speaker to achieve the purpose for automatic switching to receive an incoming call.

Thus, the switch means will automatically cut off the music signal transmitted from the stereo to the speaker and then transmit the communication signal of the mobile telephone to the speaker instead of the music signal.

In order to achieve the above and other objects, the present invention provides an electromagnetic wave receiver on a signal line of a mobile telephone. The electromagnetic receiver is implemented to detect electromagnetic waves emitted by the mobile telephone to automatically detect the state of the mobile telephone and then switch to another state.

The above and other objects, features and advantages of the present invention will become apparent from the following detailed description with reference to the accompanying drawings.

1 schematically illustrates a conventional connection between a car stereo and a speaker;

2 schematically illustrates a connection between a car stereo and a speaker with a switch means of the present invention;

3 is a view showing a preferred embodiment of the present invention.

4 is an electric block diagram of the present invention shown in FIG.

5 is an electrical block diagram of another preferred embodiment of the present invention.

2, a hands free device 8 for a mobile phone constructed in accordance with the present invention is shown. As shown, the hands free device 8 is connected to a signal line 11 connected between the stereo 10 and the speaker 12 for transmission to the speaker 12 to reproduce the music signal. In this state, the music played from the stereo 10 through the speaker 12 is usually interrupted when an incoming call is detected by the device 8. Instead, the voice of the incoming call is output through the speaker 12.

3 illustrates a preferred embodiment of the present invention. As shown, the signal line is connected from the jack 16 of the mobile telephone 41 to the apparatus 8, between which an electromagnetic receiver 3 is provided. The microphone 42 is also connected to the device 8. Optionally, a cigarette lighter jack 15 may be connected to the device 8. This device 8 is also connected between the car stereo 10 and the speaker 12. In this state, the device 8 can control the stereo 10 and the mobile phone 41 to reproduce the music or the voice of the incoming call by detecting the occurrence of the incoming call.

4 illustrates an electrical block diagram of the present invention. As shown, the present invention provides a car stereo 10, a speaker 12, a cigarette lighter jack 15, a jack 16 of a mobile telephone 41, a switch means 2, an electromagnetic receiver 3, a mobile A telephone 41, a microphone 42, a charger circuit 51, a microphone amplifier circuit 52, and an amplifier circuit 53. It is to be noted that all of these components are prior art, and detailed descriptions thereof are omitted herein for brevity.

It is to be understood that whenever an incoming or outgoing call is made, electromagnetic waves are emitted by the mobile phone 41. In this state, the state of the mobile telephone 41 can be known accurately by detecting whether there is an electromagnetic wave emitted by the mobile telephone 41.

The switch means 2 is connected between the stereo 10 and the speaker 12, the input of the switch means 2 is connected to the stereo 10 via a signal line and the output is connected to the speaker 12. The switch means 2 is controlled by the electromagnetic receiver 3 to determine the signal source (ie stereo 10 or incoming call).

Since the electromagnetic wave is not emitted by the mobile telephone 41 in the first state, that is, without the incoming call, no electromagnetic wave is received by the electromagnetic receiver 3. Thus, the switch means 2 transmits the music for reproduction from the stereo 10 to the speaker 12. Instead, the electromagnetic wave is emitted by the mobile telephone 41 in the second state (that is, the state where the incoming call is made), so that the electromagnetic wave receiver 3 receives the electromagnetic wave. Thus, the switch means 2 is instructed to cut the music signal from the stereo 10 and then switch the signal line so that the incoming call can be reproduced on the speaker 12.

Note that the music signal is only temporarily interrupted by an incoming call. That is, the stereo 10 is still in operation. Once the incoming call has finished playing through the speaker 12, the music from the stereo 10 will be played immediately. Therefore, frequent on / off switching does not occur in the present invention.

The switch means 2 are implemented by a relay (not shown). The relay of the switch means 2 such that the on state is a normal state between the stereo 10 and the speaker 12 for music reproduction, and an off state is generated only when electromagnetic waves are received by the electromagnetic receiver 3. Is designed to operate. The switch means 2 also comprise a driver circuit (not shown) which is driven such that the relay of the switch means 2 is operated when electromagnetic waves are received by the electromagnetic receiver 3.

In addition, an external speaker 55 may be provided to obtain additional features. In addition, the cigarette lighter jack 15 is removed when the power supply of the present invention device is directly connected to the power supply of the vehicle.

Referring to FIG. 5, the electromagnetic wave receiver 3 is implemented with a microcontroller 31. The microcontroller 31 can directly detect the voltage level of the jack 16 and the mobile telephone 41 to perform the same function as the electromagnetic receiver 3. Alternatively, the microcontroller 31 can be coupled in the electromagnetic receiver 3.

Although the subject matter disclosed herein has been described by way of specific embodiments, various changes and modifications may be made by those skilled in the art without departing from the scope and spirit of the subject matter disclosed within the claims.

In the present invention, by automatically detecting the occurrence of an incoming call and an outgoing call and switching the signal between the car stereo and the speaker, the voice quality is good, the charging is possible even during use, and the on / off switching effect is simplified. Is achieved.

Claims (5)

In hands-free device for mobile phone, a) stereo; b) speakers; c) microphone; d) a circuit assembly comprising a charger circuit, a microphone amplifier circuit, and an amplifier circuit; e) switch means connected between said stereo and a speaker; And f) an electromagnetic receiver connected between the mobile telephone and the switch means to detect electromagnetic waves and determine whether the mobile telephone is receiving an incoming call Including, If no incoming call is made, no electromagnetic waves are emitted by the mobile phone, the electromagnetic receiver is not activated, the switch means transmits music reproduced from stereo to the speaker, When an incoming call is made, electromagnetic waves are emitted by the mobile telephone, the electromagnetic receiver receives the electromagnetic waves, and the switch means blocks the music transmitted from the stereo and then the incoming call can be played on the speaker. Receive instructions from the electromagnetic receiver to switch to the circuit assembly Hands free device for mobile phones. The method of claim 1, Hands free device for a mobile telephone, wherein said switch means comprises a relay and a driver circuit. The method of claim 1, And a external speaker connected to said switch means. The method of claim 1, Hands free device for a mobile phone wherein the electromagnetic wave receiver is implemented by a microcontroller. The method of claim 4, wherein Hands free device for a mobile telephone, wherein the electromagnetic wave receiver is implemented by a combination of the electromagnetic wave receiver and a microcontroller.