CN201378471Y

CN201378471Y - USB cable

Info

Publication number: CN201378471Y
Application number: CN200820204949U
Authority: CN
Inventors: 白建文
Original assignee: LINOYA ELECTRONICS CO Ltd
Current assignee: LINOYA ELECTRONICS CO Ltd
Priority date: 2008-12-10
Filing date: 2008-12-10
Publication date: 2010-01-06
Anticipated expiration: 2018-12-10

Abstract

The utility model relates to a USB cable, comprising an insulating shell, a woven layer and a wire group. The wire group is covered in the woven layer; the woven layer is covered in the insulating shell; the wire group comprises two signal wire pairs and four power wires, which are stranded together; and each signal wire pair is formed by two signal wires and one grounding wire which are stranded together, wherein the signals wires are externally covered by aluminium foils. Therefore, the multicore wire group is formed by the two signal wire pairs and the four power wires, which are stranded together. The USB cable has the characteristics of good characteristic impedance, small internally-delaying difference and low attenuation, meets the requirement of USB 3.0 standard and is good for market popularization.

Description

The USB cable

Technical field

The utility model relates to a kind of cable, refers in particular to the USB cable of a kind of USB3.0 of meeting data wire requirement.

Background technology

Along with the computer hardware develop rapidly, ancillary equipment is increasing, keyboard, mouse, modulator-demodulator, printer, scanner are well-known already, digital camera, MP3/MP4 walkman come one after another, and so Duo equipment all is USB interface and the personal computer accesses by standardization, unification; As everyone knows, USB is the abbreviation of English Universal Serial BUS, and Chinese implication is " USB ".Current, the application of USB interface is very extensive, and its development trend has substantial connection with between the user naturally.

USB interface is since 1.0 versions come out, its transmission rate only is 12Mbps, be improved to 2.0 versions thereafter, this USB 2.0 has been increased to 480Mbps with data transfer between devices speed, than USB 1.0 standards fast about 40 times, the raising of speed means exactly that for user's largest benefit the user can use external equipment more efficiently, and the peripheral equipment with multiple speed can be connected on the circuit of USB 2.0, and bottleneck effect takes place when need not the concern of data transmission.Along with popularizing day by day and the continuous increase of transfer files of Digital Media, standard usb interface must be upgraded, so the USB3.0 standard interface arises at the historic moment thereupon, it has adopted antithesis simplex four-wire system differential signal line, so can support two-way simultaneous streaming transmission, high transmission speed can reach 7.5Gbps, so the required cable of this USB3.0 is proposed very high requirement.

The utility model content

The utility model main purpose be to provide a kind of characteristic impedance good, internally prolong the USB cable that the chi difference is little and decay is also little, to meet the requirement of USB3.0 data wire.

For realizing above-mentioned purpose, the utility model is taked following technical scheme:

A kind of USB cable, comprise the outer quilt of insulation, braid and line group, this line group is coated in the braid, this insulation is outer to be coated on outside the braid, this line group include two holding wires that twist together to four power lines, each holding wire is to being by the binary signal line and an earth connection is stranded forms, and this holding wire is to being coated with aluminium foil.

Described two pairs of holding wires and two pairs of power lines surround a space jointly, are filled with article shaped in this space.

The utility model advantage is by two holding wires being twisted into the split conductor group together with four power lines, this cable have characteristic impedance good, internally prolong the characteristics that the chi difference is little and decay is also little, meet the required requirement of USB3.0 standard, help marketing.

Description of drawings

Fig. 1 is the schematic cross-section of the utility model USB cable.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, a kind of USB cable includes two holding wires that twist together to 1 and four power line 2, its outer braid 3 that is surrounded with, outside this braid 3 is wrapped with insulation by 5.For making the effective moulding of cable, can surround a space 6 at two pairs of holding wires 1 and two pairs of 2 of power lines, can be filled with article shaped 7 in this space 6.

Further, described holding wire is by binary signal line 11 and an earth connection 12 stranded forming to 1, and is coated with aluminium foil 8 at this holding wire to 1, so really shield effectiveness.

Above-mentioned cable, through facts have proved, characteristic impedance (Differential Impedance) is 90 ± 6.5 Ω, internally prolongs chi poor (Intra skew) less than 15ps/M; The decay (SignalPair Attenuation) under the frequency of 0.625G greater than 0.9dB/M, under the frequency of 1.25G greater than 1.3dB/M, under the frequency of 2.5G greater than 1.9dB/M, under the frequency of 5G greater than 3.1dB/M, under the frequency of 7G greater than 4.2dB/M; So the utility model adopts two pairs of holding wires and four power lines to be twisted into multi-core cable together, have characteristic impedance good, internally prolong the characteristics that the chi difference is little and decay is also little, meet the required requirement of USB3.0 standard, help marketing.

The above, it only is the preferred embodiment of the utility model structure, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of USB cable, comprise the outer quilt of insulation, braid and line group, this line group is coated in the braid, this insulation is outer to be coated on outside the braid, it is characterized in that: this line group include two holding wires that twist together to four power lines, each holding wire is to being by the binary signal line and an earth connection is stranded forms, and this holding wire is to being coated with aluminium foil.

2, USB cable according to claim 1 is characterized in that: described two pairs of holding wires and two pairs of power lines surround a space jointly, are filled with article shaped in this space.