Cable with demagnetizing layer of graphene

A cable includes a transmission cord having two connecting terminals formed on two opposite ends thereof, two connectors respectively mounted on the two connecting terminals of the transmission cord, two end caps mounted on the transmission cord and respectively connected with the two connectors, and at least one demagnetizing layer mounted on the two connectors and received in the two end caps. The transmission cord includes a conducting wire, an insulating layer wrapped around the conducting wire to insulate the conducting wire, and a protective layer wrapped around an outer face of the transmission cord. The at least one demagnetizing layer is made of graphene to prevent the electromagnetic waves of the ambient environment from interfering with the signal transmission of the transmission cord.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a cable and, more particularly, to a cable for a sound reproducing system.

2. Description of the Related Art

A cable is used in house appliances, instruments, electronic tools, automation equipment or the like, to function as a signal line for transmission of signals. However, the signals are easily interrupted by noises, such as external electromagnetic waves, during transmission of the signals (especially high frequency signals), so that the signals are unsteady due to the noise interference. When the cable is used in a sound reproducing system, the cable is more easily affected by the noise interference. The sound reproducing system includes many transmission cables whose noises interfere with each other, so that the audio signals are interrupted, and the sound transmitted by the transmission cables is unsteady. A metallic film (or mesh shielding layer) is coated on the transmission cable and is grounded to isolate the noise interference efficiently. Alternatively, an anti-magnetic ring made of ferrite material is mounted on the transmission cable to resist the electromagnetic interference. However, the transmission cable has two end connectors that are not coated so that the external interference cannot be isolated efficiently. Thus, the transmission cable is still interrupted by the electromagnetic interference, and produces minor noises that are amplified by the players of the sound reproducing system, thereby decreasing the sound quality. In addition, the anti-magnetic ring and the mesh shielding layer cannot filter the signal interference completely, thereby causing disturbance to the transmission cable.

BRIEF SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a cable with a demagnetizing layer made of graphene.

In accordance with the present invention, there is provided a cable comprising a transmission cord having two connecting terminals formed on two opposite ends thereof, two connectors respectively mounted on the two connecting terminals of the transmission cord, two end caps mounted on the transmission cord and respectively connected with the two connectors, and at least one demagnetizing layer mounted on the two connectors and received in the two end caps. The transmission cord includes a conducting wire, an insulating layer wrapped around the conducting wire to insulate the conducting wire, and a protective layer wrapped around an outer face of the transmission cord to protect a whole structure of the transmission cord. The conducting wire is made of metallic material. The protective layer is made of insulating material. Each of the two connectors has a first end provided with a connecting portion mounted on mounted on each of the two connecting terminals of the transmission cord and electrically connected with the conducting wire of the transmission cord. Each of the two connectors has a second end provided with a fitting portion electrically coupled to an audio device. Each of the two end caps has a tubular shape. Each of the two end caps is mounted on an outer face of the connecting portion of each of the two connectors, and the connecting portion of each of the two connectors is received in each of the two end caps. The at least one demagnetizing layer is made of graphene material and covers the connecting portion of each of the two connectors.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially toFIGS. 1 and 2, a cable in accordance with the preferred embodiment of the present invention comprises a transmission cord1having two connecting terminals15formed on two opposite ends thereof, two connectors2respectively mounted on the two connecting terminals15of the transmission cord1, two end caps3mounted on the transmission cord1and respectively connected with the two connectors2, and at least one demagnetizing layer4mounted on the two connectors2and received in the two end caps3.

The transmission cord1functions as an audio signal line or a power supply line. The transmission cord1includes a conducting wire11, an insulating layer12wrapped around the conducting wire11to insulate the conducting wire11, and a protective layer14wrapped around an outer face of the transmission cord1to protect a whole structure of the transmission cord1. The conducting wire11is made of metallic material for transmitting a signal. The protective layer14is made of insulating material.

Each of the two connectors2has a first end provided with a connecting portion21mounted on mounted on each of the two connecting terminals15of the transmission cord1and electrically connected with the conducting wire11of the transmission cord1. Each of the two connectors2has a second end provided with a fitting portion22electrically coupled to an audio device, such as a sound or an acoustics for transmitting the signal. Preferably, the fitting portion22of each of the two connectors2is inserted into a slot of the sound.

Each of the two end caps3has a tubular shape. Each of the two end caps3is mounted on an outer face of the connecting portion21of each of the two connectors2, and the connecting portion21of each of the two connectors2is received in each of the two end caps3. Thus, each of the two end caps3protects each of the two connectors2and the at least one demagnetizing layer4.

The at least one demagnetizing layer4is made of graphene material and covers the connecting portion21of each of the two connectors2. Thus, the at least one demagnetizing layer4is located between each of the two end caps3and the connecting portion21of each of the two connectors2.

In the preferred embodiment of the present invention, the at least one demagnetizing layer4presents a nanometer dimension.

In the preferred embodiment of the present invention, the transmission cord1is made of copper, silver, silver-plated copper, tin-plated copper, gold or an alloy.

In the preferred embodiment of the present invention, the transmission cord1is a single-core cord or a stranded cord.

In the preferred embodiment of the present invention, each of the two connectors2has a 3.5 connector type, a 6.3 connector type, an RCA terminal type, an XLR balance terminal type, a banana plug type, a corrugated plug type, a Y-shaped plug type or an electric plug type. Thus, each of the two connectors2is available for sounds having slots of different specifications.

In the preferred embodiment of the present invention, the transmission cord1further includes at least one isolating layer13wrapped around an outer face of the insulating layer12for isolating an electromagnetic signal interference caused by noises produced by radio waves. The protective layer14protects and prevents the at least one isolating layer13from being worn out or broken.

In the preferred embodiment of the present invention, the at least one isolating layer13is made of an aluminum foil, a hot melt aluminum foil, a tin foil or a mesh weaving metallic thread that is wrapped from inside to outside.

In the preferred embodiment of the present invention, the connecting portion21of each of the two connectors2is connected with the conducting wire11of the transmission cord1by soldering.

In the preferred embodiment of the present invention, the transmission cord1further includes a steel wire located in the protective layer14, to reinforce a tensile strength of the transmission cord1.

In assembly, when the two connectors2are respectively mounted on the two connecting terminals15of the transmission cord1, the conducting wire11of the transmission cord1is exposed outward, so that the at least one isolating layer13cannot isolate the electromagnetic signal interference at the two connecting terminals15of the transmission cord1. At this time, the at least one demagnetizing layer4covers the two connecting terminals15of the transmission cord1to provide an isolating effect. It is appreciated that, the at least one demagnetizing layer4is made of graphene material to provide a better isolating effect. In addition, the at least one demagnetizing layer4presents a nanometer dimension, to produce a volume effect, so that when the diameter of the solid particles is reduced gradually, the chemical property thereof produces variation, such that the at least one demagnetizing layer4has a prominent demagnetizing feature and provides a better isolating effect. It is noted that, each of the two end caps3is made of a metallic shell that attenuates the electromagnetic waves by reflection to reduce the electromagnetic signal interference caused by the electromagnetic waves.

Besides, the conducting wire11is made of different kinds of metallic material, with different transmission features, and with different noise absorbing extents, so that the at least one isolating layer13cannot obstruct the noise interferences completely. Thus, the at least one demagnetizing layer4has different mounting manners to correspond to the conducting wire11made of different kinds of metallic material.

In the preferred embodiment of the present invention, the at least one demagnetizing layer4presents a manner of a mounting tube, a sticking manner or a clamping manner.

As shown inFIG. 3, when the at least one demagnetizing layer4presents a manner of a mounting tube, the at least one demagnetizing layer4is a mounting tube extending from the connecting portion21of each of the two connectors2toward the transmission cord1and completely covering the protective layer14and a connection of the two connecting terminals15of the transmission cord1and the connecting portion21of each of the two connectors2. Thus, the at least one demagnetizing layer4is available, for the transmission cord1without the at least one isolating layer13.

As shown inFIG. 4, when the at least one demagnetizing layer4presents a sticking manner, the at least one demagnetizing layer4is a roll tape wound around the transmission cord1successively. Thus, the at least one demagnetizing layer4is available for the transmission cord1that is old and does not have any demagnetizing effect.

As shown inFIG. 5, when the at least one demagnetizing layer4presents a clamping manner, the at least one demagnetizing layer4is clamped on the two connectors2or the transmission cord1and includes a shell41and a cover42. The shell41and the cover42are connected by tenon and mortise engagement. Thus, the at least one demagnetizing layer4is adjusted on the transmission cord1and is located at a position with the maximum electromagnetic signal interference so as to obstruct the electromagnetic waves efficiently.

As shown inFIG. 6, the at least one demagnetizing layer4is wrapped around an electrical connection of the conducting wire11of the transmission cord1and the connecting portion21of each of the two connectors2to enhance the effect for isolating the electromagnetic signal interference.

Accordingly, the at least one demagnetizing layer4covers the transmission cord1and the connecting portion21of each of the two connectors2to prevent the noises or the electromagnetic waves of the ambient environment from interfering with or interrupting the signal transmission of the transmission cord1and to eliminate the noises, so that the transmission cord1produces clean and bright audio signals and transmits the audio signals smoothly and steadily. In addition, each of the two end caps3is locked onto the connecting portion21of each of the two connectors2, so that the at least one demagnetizing layer4is secured on the connecting portion21of each of the two connectors2to closely cover the connecting portion21of each of the two connectors2. Further, the at least one demagnetizing layer4is made of graphene material to provide an enhanced isolating effect and to obstruct the noises or the electromagnetic waves efficiently.