CN101416359A - Vehicle cable for serial data transmission - Google Patents

Abstract

The invention relates to a vehicle cable for serially transmitting data. Said vehicle cable comprises a shield (1.5), several strands (1.1, 1.2, 1.3, 1.4), a plug-in connector (2) with several terminal pins (2.1, 2.2, 2.3, 2.4), and an electrically conducting shielding housing (3) which surrounds the plug-in connector (2). The shielding housing (3) is electrically connected to the shield (1.5) while one respective strand (1.1, 1.2, 1.3, 1.4) is in direct contact with one respective terminal pin (2.1, 2.2, 2.3, 2.4).

Description

The vehicle cable that is used for Serial Data Transfer Mode

The present invention relates to according to claim 1, boundling, as to be used for Serial Data Transfer Mode vehicle cable, described vehicle cable comprises plug-in connector.

Such vehicle cable for example can be used in motor vehicle or the aircraft and usually and be required in a large number numbers of packages.For corresponding vehicle cable is provided at low cost, but simple structure and simple convergence are significant.In addition, this vehicle cable must be the good electrical magnetic screen, and the electromagnetic wave that gives off thus can not cause for example interference in the vehicle electronics assembly of related vehicle.

Disclose a kind of plug-in connector that is used for motor vehicle by WO 03 058 765 A1, described plug-in connector has the frame mode of conductively-closed.At this, plug-in connector is fixed on the printed circuit board (PCB).

Show a kind of plug-in connector of conductively-closed in US 5 766 041 equally, its situation common in road vehicle application of this plug-in connector equally is installed in the skirting board of front side.Also recommended to have the frame mode of printed circuit board (PCB) in the document.

Usually, the frame mode that plug-in connector is installed on the printed circuit board (PCB) is applied in the vehicle, and wherein this plug-in connector is used to connect outside electronic equipment.Often also dispose electric parts on printed circuit board (PCB), these electric parts can satisfy the most changeable function.In addition, other plug-in connector that is connected with the onboard power system (Bordnetz) of vehicle is installed usually on printed circuit board (PCB).

Known vehicle cable mainly has such shortcoming, and they especially under the high-frequency transfer of data situation, when occurring under high data transmission rate situation as them, do not have enough Electro Magnetic Compatibilities (EMV).

Therefore, task of the present invention is to provide a kind of vehicle cable, and it is conductively-closed admirably, makes the electromagnetic power that gives off be reduced, and guarantees high EMV compactness (EMV-dichtigkeit).Yet in addition, vehicle cable also should be able to be processed with less manufacturing cost.

Described task is solved by the feature of claim 1 according to the present invention.

According to the present invention, for the transfer of data of serial, described vehicle cable comprises the shielding around a plurality of heart yearns.In addition, the plug-in connector with a plurality of connection pins also belongs to this vehicle cable.Here, the shielding case that conducted electricity of plug-in connector surrounds.Described shielding case is electrically connected with shielding and each is connected pin and directly contacts with a corresponding heart yearn.

Directly contact especially is understood that not have the frame mode of printed circuit board (PCB), wherein heart yearn for example with is connected pin and welds.Illustrate in mirable mode, different with known structure mode with printed circuit board (PCB), can significantly improve now in the characteristic aspect the Electro Magnetic Compatibility (EMV).Therefore, theme of the present invention does not especially have the vehicle cable of printed circuit board (PCB) or printed wiring board.

As being proved particularly advantageous frame mode, vehicle cable of the present invention has at least four heart yearns.

The outline that plug-in connector or its housing have the essentially rectangular shape usually.Advantageously, the whole outer surface of plug-in connector, except for that important with the acting in conjunction of plug-in connector counterpart face all the conductively-closed shell closely surround.Under the outline situation of the rectangular shape that exists usually, five outer surfaces of plug-in connector correspondingly conductively-closed shell surround.

In preferred version of the present invention, if connecting (Crimp-Verbindung) by crimping, shielding case is connected with described shielding, then obtain extra high EMV compactness.

Vehicle cable is required usually especially in large quantities, and therefore especially importantly: such vehicle cable can be simple and manufactured at low cost.For this reason and consider high EMV compactness, advantageously, described shielding case is constituted by single type (einstueckig).If shielding case at first with the extrusion process manufacturing and subsequently further by deep-draw, has then been realized fabulous and economic manufacturability.Advantageously, the material of shielding case is made of aluminum until the weight that surpasses 70%.The weight of especially technical pure aluminium (≧ 90%) be suitable for as the material that is used for shielding case especially goodly.

In another program of the present invention, be provided with at least one electric parts in shielding case inside, by the test or the diagnostic function of described electric parts realization for vehicle cable.When using a plurality of so electric parts, circuit can be set in shielding case, can realize test or diagnostic function by described circuit for vehicle cable.

Advantageously, electric parts are directly being contacted on one of described heart yearn and/or on one of described connection pin." directly contact " means also that at this vehicle cable does not especially have printed circuit board (PCB), makes that for example related electric parts can be welded direct on pin or the heart yearn.

Be used for frame mode test purpose, that be arranged on the electric parts in the shielding case by having, when vehicle cable must satisfy this test function, the EMV compactness of related vehicle cable further was enhanced.

Irradiation of electromagnetic waves also depends on the geometry of radiant body.Vehicle cable of the present invention is in the application of USB plug-in connector (USB plug-in connector), especially be proved to be particularly advantageous in the standard USB plug of category-A type or standard USB socket.

Especially, vehicle cable of the present invention can be used to meet the interface of USB2.0 standard, and does not have the difficulty of Electro Magnetic Compatibility aspect.Correspondingly, the data transmission rate of 480 MBit/s is possible without a doubt, and high data transmission rate although it is so can cause high voltage-frequency in vehicle cable.

In preferred version of the present invention, vehicle cable has other plug-in connector.Especially advantageously, described plug-in connector is constructed according to FAKRA (FAKRA=(Germany) auto industry Professional Committee) standard.

Plug-in connector is understood that electric coupling below, and it can be constructed to plug, also can be constructed to socket.

Favourable scheme of the present invention can obtain from dependent claims.

Other details of vehicle cable of the present invention and advantage from behind, obtain in the description by the embodiment of accompanying drawing.

Show:

The diagrammatic sketch of Fig. 1 vehicle cable,

The perspective view of Fig. 2 a shielding case,

First cutaway view of Fig. 2 b shielding case,

Second cutaway view of Fig. 2 c shielding case,

Fig. 3 has the perspective view that connects the pin and the plug-in connector of the heart yearn of the electric wire that belongs to vehicle cable,

The schematic circuit of Fig. 4 vehicle cable.

Figure 1 illustrates vehicle cable, it comprises electric wire 1, plug-in connector (being Atype USB socket 2 flat, the essentially rectangular shape in the embodiment that is introduced), and shielding case 3.In addition, an other plug-in connector is distributed to this vehicle cable, and described other plug-in connector is so-called FAKRAplug 4 here.

Electric wire 1 comprises the overcoat of insulation, and described overcoat encirclement shielding 1.5 (Fig. 3, Fig. 4).In addition, electric wire 1 also comprises four heart yearns 1.1,1.2,1.3,1.4.Two heart yearns 1.2,1.3 are determined and are used to transmit data.Two other heart yearn 1.1,1.4 should be supplied with the equipment that is connected by the voltage with 5V in the work of vehicle cable.(Fig. 4) surrounded in four heart yearn 1.1,1.2,1.3,1.4 conductively-closeds 1.5 in electric wire 1.

In installation process, at first will remove, and will shield 1.5 net and translate into the overcoat top at the designated overcoat that is used for fixing on the end on theUSB socket 2 of electric wire 1.Fix in order to shield 1.5 free end, shrinkage hose 1.6 is placed around this end and correspondingly by hot pressing suit (aufgeschrumpft).Then, with heart yearn 1.1,1.2,1.3,1.4 the end of removing insulation directly contacts with the pin ofsocket 2 2.1,2.2,2.3,2.4, and is soldered in the embodiment that is introduced.

According to Fig. 3 and 4, the electric parts of test circuit are arranged between first pin 2.1 and the 4th pin 2.4.These electric parts are constructed todiode 5 and resistance 6.Diode 5 and resistance 6 are connected in series, and also directly contact with the 4th pin 2.4 with first pin 2.1 by being welded to connect respectively respectively at this.

Vehicle cable also comprises theshielding case 3 of conduction, as shown in Fig. 2 a, 2b, the 2c.Realize the low-cost configuration mode in order to consider a large amount of numbers of packages,shielding case 3 is by by the aluminum component manufacturing of press strip, and described aluminum component is by deep-draw, makes the geometry thatshielding case 3 obtains according to Fig. 3.At this, be roughly the mode of zone 3.1 structures of hollow cylinder, make it be suitable for being crimped.Previous section 3.2 is used to receive USB socket 2.Fine aluminium as situation in an illustrated embodiment, has multiple advantage as the material that is used forshielding case 3 on the operation technique: described like this material can be well by press strip and simultaneously also well by deep-draw.In addition, it also has outstanding conductivity and is light, and this exactly is favourable in auto manufacturing.

In installation,shielding case 3 is pulled to above the USB socket 2 (coming from the right in Fig. 3), makesUSB socket 2 conductively-closedshells 3 surround.On this position, the zone 3.1 of hollow cylinder correspondingly surrounds shielding 1.5, wherein also conductively-closedshell 3 encirclements of the previous section 3.2 of USB socket 2.Forshielding case 3 1.5 is electrically connected with shielding reliably, withshielding case 3 plastic deformation slightly, make set up with the outer surfaces ofUSB socket 2 fix contact.In addition, flexible member, suitably crooked tongue for example usually also instead or are set with replenishing, yet they are not illustrated in described accompanying drawing on USB socket 2.These elements should can be realized reliable contact equally.The vehicle cable of finishing is configured in this wise, and a promptly whole ground comes crimpingshielding case 3 around USB socket 2.At this,shielding case 3 is gone up at five outer surfaces (with regard to USB socket 2) and is centered onUSB socket 2 and also additionally center on shielding 1.5 in join domain.By this frame mode, realized extraordinary EMV compactness.

The same as already mentioned, vehicle cable also has FAKRA plug 4.This FAKRAplug 4 is installed on end electric wire 1, relative with USB socket 2.According to Fig. 1 and 4, FAKRAplug 4 except four heart yearns 1.1,1.2,1.3,1.4 also have one other, be used to shield 1.5 contact site, contact site for example can be connected with ground.

Gou Zao vehicle cable for example can be assembled in the automobile like this, and whereinUSB socket 2 can be installed on the skirting board of front side.Before automobile is paid, can carry out so-called assembling control (Verbaukontrolle) usually at the manufacturer place.That is to say, check in the electronics mode and in automobile, in fact whether to have assembled required equipment, and also check the ability to function that whether has provided the equipment element in case of necessity.In order to realize this test function, be provided withdiode 5 and resistance 6.When carrying out test or diagnostic procedure, voltage is applied on the quad 1.4 and with heart yearn 1.1 is connected with ground.If flow through electric current, then can think:USB socket 2 vehicle cable in other words is installed in the automobile of being checked and has suffered.In order not flow through unallowed high electric current, resistance 6 is connected in series withdiode 5.

In the work of vehicle cable, just in time opposite in the symbol of the voltage potential between the quad 1.4 and first heart yearn 1.1 and thetest process.Diode 5 not conducting under this state makes the test circuit of being made up ofdiode 5 and resistance 6 not influence work.

This structure by the test circuit be made up ofdiode 5 and resistance 6 can realize now, and vehicle cable can be tested and be for example need not from the outside visit by switch.Thus, test circuit also can fully be realized with shielding, has therefore guaranteed very high EMV compactness.The circuit that is used for test function in traditional vehicle cable is installed in printed circuit board (PCB) or circuit board (platine) usually.

If the data transmission rate with high for example 480Mbit/s is a condition, for example high voltage-frequency of the 40MHz order of magnitude then appears in vehicle cable.Show now,, especially under the condition of using printed circuit board (PCB), when work, can cause higher relatively radiation level with the corresponding vehicle cable of traditional structure mode.Described high radiation level especially may trigger interference in the vehicle electronics assembly, in any case this especially must be avoided in the relevant function of the safety of vehicle electronics assembly.By vehicle cable of the present invention, the electromagnetism incompatibility of the USB interface in vehicle is excluded.

Claims (11)

1. be used for the vehicle cable of Serial Data Transfer Mode, comprise

Shielding (1.5),

A plurality of heart yearns (1.1,1.2,1.3,1.4),

Plug-in connector (2) with a plurality of connection pins (2.1,2.2,2.3,2.4), and

Surround the shielding case (3) of the conduction of described plug-in connector (2),

Wherein said shielding case (3) is electrically connected with described shielding (1.5) and each described heart yearn (1.1,1.2,1.3,1.4) directly contacts with a corresponding described pin (2.1,2.2,2.3,24) that is connected.

2. according to the described vehicle cable of claim 1, wherein:

Described shielding case (3) connects by crimping and is connected with described shielding (1.5).

3. according to claim 1 or 2 described vehicle cables, wherein:

Described shielding case (3) is constituted by single type ground.

4. each described vehicle cable in requiring according to aforesaid right, wherein:

Described shielding case (3) is constructed to the parts of deep-draw.

5. each described vehicle cable in requiring according to aforesaid right, wherein:

Described shielding case (3) is made by the material with the aluminium that surpasses 70% weight.

6. each described vehicle cable in requiring according to aforesaid right, wherein:

In described shielding case (3), be provided with at least one electric parts (5,6), by the test function of described electric parts realization for described vehicle cable.

7. according to the described vehicle cable of claim 6, wherein:

In described shielding case (3), be provided with diode as electric parts (5).

8. according to claim 6 or 7 described vehicle cables, wherein:

In described shielding case (3), be provided with resistance as electric parts (6).

9. according to each described vehicle cable in the claim 6 to 8, wherein:

At least one electric parts (5,6) is gone up or is upward directly contacted at one of described connection pin (2.1,2.2,2.3,2.4) at one of described heart yearn (1.1,1.2,1.3,1.4).

10. each described vehicle cable in requiring according to aforesaid right, wherein:

Described plug-in connector (2) is constructed to the USB plug-in connector, especially is constructed to the standard plug or the standard socket of category-A type.

11. according to each described vehicle cable in the aforesaid right requirement, wherein:

Described vehicle cable comprises other plug-in connector (4), especially comprises the FAKRA-plug-in connector.

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