CN212010396U

CN212010396U - Three-wire cable for computer

Info

Publication number: CN212010396U
Application number: CN202020562411.0U
Authority: CN
Inventors: 余宗双; 何俊晨; 张启邦; 张明新; 唐磊
Original assignee: Anhui Zhongbang Special Cable Technology Co ltd
Current assignee: Anhui Zhongbang Special Cable Technology Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-24
Anticipated expiration: 2030-04-16

Abstract

The utility model relates to the technical field of cables, a three-way cable for computer is disclosed for solve traditional ribbon cable because the integrated configuration requires, the conductor in the cable often can only utilize 75%, and coaxial cable transmits the same signal volume many that will be big, and termination department is very hard simultaneously, is not suitable for the problem of being used for the connection of computer. The following scheme is proposed: the ground conductor is positioned on two sides of the signal conductor, the diameter of the signal conductor is smaller than that of the ground conductor, and the insulating medium layer wraps the outer sides of the signal conductor and the ground conductor. The utility model relates to a rationally, its cable has ribbon cable and coaxial cable's advantage concurrently, simple structure simultaneously, and the compliance is good, and light in weight, small, characteristics such as with low costs replace traditional ribbon cable, are applicable to very much and connect between the computer interconnection equipment and use.

Description

Three-wire cable for computer

Technical Field

The utility model relates to the technical field of cables, especially, relate to a three-way cable for computer.

Background

The miniaturization of packages in computers means that less and less space is left for wiring, and flexible multi-core ribbon cables have been used in the past, however, coupling noise in ribbon cables has become a serious problem due to increased computer speed and reduced circuit delay time and signal rise time, and has been limited in the application of high-speed computers. In addition, because of the requirements of the combined structure, the conductor in the cable can only be used by 75%, so the ribbon cable can not meet the requirements, as for the coaxial cable, the transmission of the same signal volume of the coaxial cable is much larger, and meanwhile, the termination part is very hard and is not suitable for the connection of a computer, so a three-wire cable which can integrate the advantages of the ribbon cable and the advantages of the coaxial cable is developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-way cable for computer, this cable have ribbon cable and coaxial cable's advantage concurrently to transmission signal loss is little, the impedance is stable, simple structure, small, light in weight, the expense is low, simple to operate etc..

The utility model provides a three-wire cable for computer, including signal conductor, ground conductor and insulating medium layer, ground conductor is located signal conductor's both sides, just signal conductor's diameter is less than ground conductor's diameter, insulating medium layer parcel is in signal conductor and ground conductor's the outside.

Preferably, the signal conductor and the grounding conductor both adopt stranded silver-plated copper alloy stranded conductors, and the thickness of the silver plating layer is not less than microns.

Preferably, the insulating medium layer is made of Teflon plastic or flame-retardant polyethylene material and is in a flat structure formed by gapless extrusion of the mold core and the mold sleeve.

Preferably, the center-to-center spacing between the signal conductors and the ground conductors is 0.28-0.30 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the conductor of the utility model has different designs, because the central signal conductor is smaller, the shielding result is better;

2. the utility model has larger signal-to-ground distance, and separates adjacent signals;

3. the independent cable geometry eliminates all noise in each ribbon cable and reduces noise between stacked cables;

4. the three-wire cable has the advantages of simple structure, small volume, light weight, excellent bending performance, low cost, convenient installation, stable characteristic impedance, low noise and the like.

To sum up, the utility model relates to a rationally, its cable has ribbon cable and coaxial cable's advantage concurrently, simple structure simultaneously, and the compliance is good, light in weight, small, characteristics such as with low costs replace traditional ribbon cable, are applicable to very much and connect between the computer interconnection equipment and use.

Drawings

Fig. 1 is a schematic structural diagram of a three-wire cable for a computer according to the present invention.

In the figure: 1 signal conductor, 2 grounding conductor and 3 insulating medium layer.

Detailed Description

The present invention will be further explained with reference to the following embodiments.

Examples

Referring to fig. 1, the three-wire cable for the computer comprises a signal conductor 1, a ground conductor 2 and an insulating medium layer 3, wherein the ground conductor 2 is positioned on two sides of the signal conductor 1, the diameter of the signal conductor 1 is smaller than that of the ground conductor 2, and the insulating medium layer 3 is wrapped on the outer sides of the signal conductor 1 and the ground conductor 2.

In this embodiment, the signal conductor 1 transmits signals only on the outer surface of the conductor according to the skin effect transmission characteristic of high-frequency signals, so based on the double considerations of cost and performance, the cable conductor uses a silver-plated copper gold wire conforming to the ASTM B298 standard. The inner copper layer of the silver-plated round copper wire provides excellent mechanical property, and the outer silver layer provides good signal transmission performance. In order to improve the data transmission performance of the cable, the thickness of a silver coating layer of the silver-coated round copper wire is not less than 3 microns. Compared with a single-core conductor, the stranded conductor has the advantages of soft structure, increased tensile strength of the whole conductor, difficult breakage of the conductor, stable stranded structure, stable and reliable electrical property transmission and the like. Therefore, a conductor having a cross-sectional area of 0.03mm2 was designed in a 7 × 0.07mm stranded structure, and the stranded wires were regularly stranded in a 1+6 arrangement structure, with the outside diameter of the strand controlled to (0.21 ± 0.01) mm. The DC resistance of the signal conductor at 20 ℃ is not more than 750 omega/km in order to reduce attenuation. The signal conductor is small in diameter and easy to break during interconnection, the silver-plated alloy conductor is silver-plated silver-copper alloy wires with excellent tensile resistance, the overall tensile resistance of the signal conductor after stranding is not small by 11.3N, and the silver-plated silver-copper alloy comprises the following components in parts by weight: 95-96 parts of copper and 4-5 parts of silver.

In this embodiment, the two grounding conductors 2 transmit signals only on the outer surfaces of the conductors according to the skin effect transmission characteristics of high-frequency signals, so that the cable conductor adopts a silver-plated copper gold wire conforming to the ASTM B298 standard based on double considerations of cost and performance. The inner copper layer of the silver-plated round copper wire provides excellent mechanical property, and the outer silver layer provides good signal transmission performance. In order to improve the shielding performance of the grounding conductor of the cable, the thickness of a silver-plated layer of the silver-plated round copper wire is not less than 3 microns. Compared with a single-core conductor, the stranded conductor has the advantages of soft structure, increased tensile strength of the whole conductor, difficult breakage of the conductor, stable stranded structure, stable and reliable electrical property transmission and the like. Therefore, the ground conductor having a cross-sectional area of 0.09mm2 was designed in a 7 × 0.127mm stranded structure, and the stranded wires were regularly stranded in a 1+6 arrangement structure, with the outside diameter of the strand controlled to (0.36 ± 0.01) mm. In order to increase the shielding performance of the grounding conductor, the 20 ℃ direct current resistance of the grounding conductor is not more than 245 omega/km. Although the diameter of the grounding conductor is larger than that of the signal conductor, the diameter of the grounding conductor is smaller, the grounding conductor is easy to break when being interconnected, the silver-plated alloy conductor adopts silver-plated silver-copper alloy wires with excellent tensile resistance, the overall tensile resistance of the grounding conductor after being stranded is not smaller than 37.3N, and the silver-plated silver-copper alloy consists of the following components in parts by weight: 95-96 parts of copper and 4-5 parts of silver.

In this embodiment, the insulating medium 3 is a teflon material or a polyethylene material, and when the insulating medium layer 3 is the teflon material, the center-to-center distance between the signal conductor 1 and the ground conductor 2 is 0.292 mm.

The insulating medium layer 3 is extruded on the signal conductor 1 and the grounding conductor 2 in a gapless manner by a special mold core and a special mold sleeve in a high-temperature extruding machine extrusion mode, and the distance between the signal conductor 1 and the grounding conductor 2 is accurately controlled to be 0.292 mm.

The main technical parameters of the three-wire cable are that the transmission characteristic impedance is 50 +/-5 omega, the delay is 4.59 nanosecond/m, the capacitance of the signal conductor 1 and the two grounding conductors 2 is 92.0PF/m when the frequency is 1MHz, and the attenuation of the signal conductor 1 and the two grounding conductors 2 is 54.1 decibel/100 m when the frequency is 1 MHz.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The three-wire cable for the computer comprises a signal conductor (1), a grounding conductor (2) and an insulating medium layer (3), and is characterized in that the grounding conductor (2) is positioned on two sides of the signal conductor (1), the diameter of the signal conductor (1) is smaller than that of the grounding conductor (2), and the insulating medium layer (3) wraps the outer sides of the signal conductor (1) and the grounding conductor (2).

2. The three-wire cable for computers according to claim 1, wherein said signal conductor (1) and said ground conductor (2) are stranded conductors of stranded silver-plated copper alloy, and the thickness of silver plating layer is not less than 3 μm.

3. The three-wire cable for the computer as claimed in claim 1, wherein the insulating medium layer (3) is a flat structure formed by extruding teflon plastics or flame-retardant polyethylene through a mold core and a mold sleeve without a gap.

4. The three-wire cable for computers according to claim 1, wherein the center-to-center distance between the signal conductor (1) and the ground conductor (2) is 0.28-0.30 mm.