Title of the Invention] ELECTROMAGNETIC-WAVE-SHIELDABLE EARPHONE FOR MOBILE PHONE [Technical Field] The present invention relates to an electromagnetic-wave-shieldable earphone for a mobile phone, and more particularly, to an earphone that can shield electromagnetic waves generated from the earphone to reduce the electromagnetic effect on a human body while talking over the mobile phone using the earphone, and that can improve the communicating sound quality.

[Background Arts] Generally, when a user talks over a mobile phone or a wireless phone in a state where the phone directly contacts the ear of the user, electromagnetic waves are generated by the phone, which is harmful for the human body, and they are transmitted to the head of the user. The repeated electromagnetic wave effect on the human body may cause a disease such as a cancer.

FIG. 1 shows a conventional earphone for a mobile phone.

The conventional earphone comprises a jack 10; a wire 11 extending from the jack 10; a voice transmission part 12 into which a user's voice is input, the transmission part 12 having a connection button 12a, and being installed on a portion of the wire 11 proximal to the mouth of a user; and a receiving part 13 for sending a received sound to a user's ear, the receiving part 13 being

installed on a distal end of the wire 11.

A microphone (not shown) in which the transmission voice is input is installed in the transmission part 12. The receiving part 13 is designed such that it can be inserted in the user's ear. A speaker (not shown) is installed in the receiving part 13.

Accordingly, when it is intended that the user talks over the phone, he/she inserts the receiving part 13 in his/her ear and pushes the connection button 12a. At this point, the voice of the talking companion is transmitted to the user's ear through the speaker in the receiving part 13, and the voice of the user is input to the transmission part 12 through the microphone, thereby making mutual telecommunication possible.

However, such a conventional earphone for a mobile phone generates electromagnetic waves from the speaker and/or the microphone. The electromagnetic waves are very harmful for the human body. That is, when the electromagnetic waves are accumulated in the human body, the human body may be fatally damaged. Particularly, in the course of sending and receiving the sound signal, the earphone functions as an antenna. As a result, the electromagnetic waves are transmitted to the user's head, particularly to the brain. Furthermore, the electromagnetic waves function as noise, deteriorating the quality of the sound from the speaker.

[Disclosure of Invention] Therefore, the present invention has been made in an effort to solve the above-described problems.

It is an objective of the present invention to provide an earphone that can shield electromagnetic waves generated from an earphone to reduce the electromagnetic effect on a human body while talking over the mobile phone using the earphone, and that can improve the communicating sound quality.

To achieve the objective, the present invention provides an earphone for a mobile phone, the earphone comprising a jack for connecting with the mobile phone; a wire extending from the jack ; and transmission and receiving parts, wherein an electromagnetic-wave-shielding layer is deposited on outer surfaces of the jack, the wire, and the transmission and receiving parts, and an electromagnetic-wave-shielding member is provided in the transmission and receiving parts.

Therefore, as the electromagnetic-wave-shielding layer is formed on the outer surface of the earphone, and the electromagnetic-wave-shielding member is in the transmission and receiving parts to shield the minute electromagnetic waves generated from the speaker and the microphone, the harmful electromagnetic waves generated during telephone communication can be eliminated.

[Brief Description of the Drawings] FIG. 1 is a perspective view of a conventional earphone for a mobile phone; FIG. 2 is a perspective view of an electromagnetic-wave-shieldable earphone for a mobile phone according to the present invention; FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view of a speaker portion of an earphone for a mobile phone according to an embodiment of the present invention; FIG. 5 is a sectional view of a speaker portion of an earphone for a mobile phone according to another embodiment of the present invention; FIG. 6 is a sectional view of a speaker portion of an earphone for a mobile phone according to another embodiment of the present invention; FIG. 7 is a perspective view of an earphone for a mobile phone according to another embodiment of the present invention; and FIG. 8 is a modified example of the embodiment depicted in FIG. 7.

[Best Mode for Carrying Out the Invention] Preferred embodiments of the present invention will be described hereinafter in conjunction with the accompanying drawings.

FIG. 2 shows an electromagnetic-wave shieldable earphone for a mobile phone according to the present invention. The inventive earphone 20 comprises a jack 21, a wire 22 extending from the jack 21, and transmission and receiving parts 23 and 24 that are formed on the wire 22.

A microphone (not shown) for converting a voice sound into an electric signal to input a transmission sound is installed in the transmission part 23. An operation button 23a is provided on the wire in the vicinity of the transmission part 23.

As shown in FIG. 3, an electromagnetic-wave-shielding layer 30 is deposited on an outer surface of the earphone 20, that is, outer surfaces of the jack 21, the wire 22, the transmission part 23, and the receiving part 24.

The electromagnetic-wave-shielding layer 30 is formed of electromagnetic-wave-shielding resin, or a metal powder such as copper or aluminum.

In addition, the electromagnetic-wave-shielding layer 30 may also be formed of a tube of a fine mesh.

Meanwhile, an electromagnetic-wave shielding member 40 is installed in the receiving part 24 to intercept and remove the electromagnetic waves generated from the speaker.

FIG. 4 shows an embodiment of the electromagnetic-wave shielding member 40. The speaker 26 is mounted in the receiving groove 25 formed on an inner surface of the receiving part 24. A spiral tube 41 for inducing and interrupting the current flowing out of the speaker 26 is installed in front of the speaker 16.

A plurality of projections 41a are formed on an inner surface of the spiral tube 41 to shield or obstruct the electromagnetic waves flowing through the speaker 26.

Therefore, the sound generated in the speaker 26 is transmitted to the user, but the electromagnetic waves are intercepted and dissipated while passing through the spiral tube 41, and reflected rearward by the projections 41 a, thereby completely shielding the electromagnetic waves.

An ear-inserting portion 27 is formed on a front portion of the receiving part 24. The ear-inserting portion 27 is formed of a nonconducting material with a predetermined elastic force.

Therefore, the ear-inserting portion 27 prevents the current induced by

the electromagnetic-wave-shielding layer 30 from flowing into the human body through the ear.

At this point, the electromagnetic-wave-shielding layer 30 is formed on a surface of the receiving groove 25 to contact the spiral tube 41.

The electromagnetic-wave-shielding member 40 is not limited to the spiral tube 41. For example, as shown in FIG. 5, a plurality of mesh-shaped metal plates 42a, 42b, and 42c are provided to induce the current flowing through the speaker and prevent the electromagnetic waves from radiating frontward, thereby minimizing the electromagnetic wave effect on the human body.

At this point, the mesh-shaped metal plates 42a, 42b, and 42c are designed to contact the electromagnetic-wave-shielding layer 30 formed on the receiving groove 25.

Furthermore, the electromagnetic-wave-shielding member 40, as shown in FIG. 6, comprises a plurality of inclined shielding plates 43a, 43b, and 43c formed on a front portion of the speaker 26 to eliminate the electromagnetic waves caused by the current radiated from the speaker 26, thereby minimizing the electromagnetic waves transmitted to the human body.

A plurality of projections 44 are also formed on the inclined shielding plates 43a, 43b, and 43c to obstruct and suppress the electromagnetic waves generated from the speaker 26.

That is, the electromagnetic waves generated from the speaker 26 are reflected by the inclined shielding plates 43a, 43b, and 43c as well as the projections 44, thereby preventing the electromagnetic waves from being

radiated frontward.

The electromagnetic-wave-shielding member 40 may be also formed in the transmission part 23. In this case, the spiral tube 41, the mesh-shaped metal plates 42a, 42b, and 42c, and the inclined shielding plates 43a, 43b, and 43c are formed identically to the receiving part 24.

Meanwhile, as shown in FIG. 7, an earth plate 70 is formed on a side of the jack 21 to realize the earth by the user's hand so that the electromagnetic waves induced into the shielding layer 30 can be naturally earthed through the hand, thereby further preventing the generation of the electromagnetic waves.

FIG. 8 shows an example where the inventive earphone is employed to a vehicle. An insertion pin 81 is provided on a front end of an earth wire 80, and the insertion pin 82 is inserted into an insertion hole 82 formed on a side of the jack 21 so that the earth can be realized through a vehicle body. Therefore, when the user talks over the phone using the earphone in the vehicle, the electromagnetic waves induced into the electromagnetic-wave-shielding layer 30 can be eliminated through the earth wire 80, thereby preventing the generation of electromagnetic waves. llndustrial Applicability] As described above, as the electromagnetic-wave-shielding layer is formed on the outer surface of the earphone, and the electromagnetic-wave- shielding member is in the transmission and receiving parts to shield the minute electromagnetic waves generated from the speaker and the microphone, the harmful electromagnetic waves generated during telephone communication can be eliminated. Furthermore, as the earth wire contacts the jack, the harmful electromagnetic waves are earthed to improve the communication quality.