CN215911683U - D type data interface connecting wire with shielding - Google Patents
D type data interface connecting wire with shielding Download PDFInfo
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- CN215911683U CN215911683U CN202122230999.7U CN202122230999U CN215911683U CN 215911683 U CN215911683 U CN 215911683U CN 202122230999 U CN202122230999 U CN 202122230999U CN 215911683 U CN215911683 U CN 215911683U
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Abstract
The utility model is suitable for the technical improvement field of connecting wires, and provides a D-type data interface connecting wire with a shield, which comprises a connecting cable, a first connecting terminal and a second connecting terminal, wherein one end of the connecting cable is connected with one end of the first connecting terminal, the other end of the connecting cable is connected with one end of the second connecting terminal, a reference level pin of the first connecting terminal is connected with one end of a shielding net of the connecting cable, and a reference level pin of the second connecting terminal is connected with the other end of the shielding net of the connecting cable. And the ground interference is avoided during signal transmission, and the signal transmission quality in the shielding layer is reduced, so that the use environment of the wire rod is improved. The whole shielding layer is not damaged, so that the shielding effect of the whole transmission line cannot be reduced. The shielding layer is used for transmitting 0V signals, so that the number of wire cores of the wire can be reduced, and the cost is reduced.
Description
Technical Field
The utility model belongs to the technical improvement field of connecting wires, and particularly relates to a D-type data interface connecting wire with shielding.
Background
At present, the interface modes for multi-strand signal data transmission are various, the D-type data interface is generally called as a DB terminal, when the DB terminal is used for transmitting multi-strand signal data, signal shielding is generally required to be performed, the connection mode of the signal shielding is generally to be connected to the ground 0V or to be connected to the ground 0V after a shielding net is covered on a signal cable, and the following defects are found in practical use: when high-speed signals are transmitted, the shielding effect is poor. Strict grounding standard and avoiding ground loop interference. And thirdly, the human body electrostatic interference cannot be prevented.
Common mode signals and differential mode signals are generally available in data communication, and the common differential mode signals have stronger interference resistance. In order to improve the anti-interference capability of communication between devices in a complex industrial operation environment, data transmission is generally performed by adopting a differential mode signal mode, and further, in order to avoid interference by other electric signals, a cable for communication is generally changed into a shielded cable with a shielding net package.
The D-type data interface has the advantages of multiple types, multiple pin numbers, flexible plugging and fixing modes, and wide application in connection and data communication between equipment.
The current general way to arrange the shielded wires is: and the metal cover of the D-type data interface is communicated with the shielding net of the shielding cable. In practical use, the shielding effect is poor, which means that when the grounding effect of the equipment shell is poor, the communication is seriously interfered and the equipment can not be normally used; when the grounding of a factory is not standardized, 0V of the ground does not strictly accord with the electrical specification, and the communication is also seriously interfered, so that the equipment cannot be normally used; when the human body has more static electricity and inadvertently touches the metal shell of the D-type data terminal, the communication of the device is interfered.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a shielded D-type data interface connecting wire, and aims to solve the technical problems.
The shielded D-type data interface connecting wire comprises a connecting cable, a first connecting terminal and a second connecting terminal, wherein one end of the connecting cable is connected with one end of the first connecting terminal, the other end of the connecting cable is connected with one end of the second connecting terminal, a reference level pin of the first connecting terminal is connected with one end of a shielding net of the connecting cable, and a reference level pin of the second connecting terminal is connected with the other end of the shielding net of the connecting cable.
The further technical scheme of the utility model is as follows: the connecting cable comprises a plurality of cable cores with insulating layers, a composite film layer, a shielding layer and a cable surface layer, the cable cores are wrapped in the composite film layer after being mixed, the shielding layer is sleeved on the composite film layer, and the cable surface layer is sleeved on the shielding layer.
The further technical scheme of the utility model is as follows: the shielding layer adopts a shielding net.
The further technical scheme of the utility model is as follows: the composite film layer adopts a composite aluminum film.
The further technical scheme of the utility model is as follows: the cable surface layer is made of cable plastics.
The further technical scheme of the utility model is as follows: the first connecting terminal and the second connecting terminal are the same, and comprise a connecting terminal body, connecting screws arranged on two sides of the connecting terminal body, and a plurality of contact pins in the connecting terminal body, wherein one of the contact pins is a reference level contact pin.
The further technical scheme of the utility model is as follows: a plurality of the even range of contact pin is located this internal, control adjacent two of connecting terminal the interval of contact pin equals.
The utility model has the beneficial effects that: and the ground interference is avoided during signal transmission, and the signal transmission quality in the shielding layer is reduced, so that the use environment of the wire rod is improved. The whole shielding layer is not damaged, so that the shielding effect of the whole transmission line cannot be reduced. The shielding layer is used for transmitting 0V signals, so that the number of wire cores of the wire can be reduced, and the cost is reduced.
Drawings
Fig. 1 is a first structural diagram of a D-type data interface connection line with shielding according to an embodiment of the present invention.
Fig. 2 is a second structural diagram of a D-type data interface connection line with shielding according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a structure of a shielded D-type data interface connection line according to an embodiment of the present invention.
Fig. 4 is a first top view of a terminal of a connection terminal according to an embodiment of the present invention.
Fig. 5 is a second top view of the terminal of the connection terminal according to the embodiment of the present invention.
Detailed Description
Reference numerals: 10-connecting terminal body 20-cable surface layer 30-composite aluminum film 40-shielding layer 50-connecting screw 60-shielding net
A shielded wire connection mode for a D-type data interface mainly uses a common shielded cable as a conductor for transmitting signals, connects a digital sampling reference level 0V to a shielded net of the shielded cable, and avoids the interference of the ground 0V on the transmission signals because the shielded net is not connected with a metal cover of the D-type data interface.
Firstly, a lead signal pin to be transmitted is welded to a pin of a D-type data interface, then a shielding net is twisted into a bundle and welded to a pin corresponding to a digital 0V, and the other end of a transmission signal is also subjected to the same welding treatment, so that a signal transmission lead with electromagnetic interference shielding is obtained. The related wire is a common shielded cable, the cable is provided with a plurality of twisted pairs which are mutually intertwined pairwise, a composite aluminum film formed by compounding a layer of plastic and aluminum foil is wrapped outside the plurality of twisted pairs, a shielding net woven by fine stainless steel is arranged on the outer layer of the composite aluminum film, and the outermost layer is silica gel plastic.
As shown in fig. 1 to 5, the shielded D-type data interface connection line provided by the present invention includes a connection cable, a first connection terminal, and a second connection terminal, wherein one end of the connection cable is connected to one end of the first connection terminal, the other end of the connection cable is connected to one end of the second connection terminal, a reference level pin of the first connection terminal is connected to one end of a shielding net of the connection cable, and a reference level pin of the second connection terminal is connected to the other end of the shielding net 60 of the connection cable.
The connecting cable comprises a plurality of cable cores with insulating layers, a composite film layer, a shielding layer 40 and a cable surface layer 20, the cable cores are wrapped in the composite film layer after being mixed, the shielding layer 40 is sleeved on the composite film layer, and the cable surface layer is sleeved on the shielding layer 40.
The shielding layer 40 is made of a shielding net 60.
The composite film layer adopts a composite aluminum film 30.
The cable surface layer 20 is made of cable plastic.
The first connecting terminal and the second connecting terminal are the same and comprise a connecting terminal body 10, connecting screws 50 arranged on two sides of the connecting terminal body 10, and a plurality of contact pins arranged in the connecting terminal body, wherein one of the contact pins is a reference level contact pin.
A plurality of the pins are arranged uniformly in the connecting terminal body 10, and the distance between the left and right adjacent pins is equal.
And the ground interference is avoided during signal transmission, and the signal transmission quality in the shielding layer is reduced, so that the use environment of the wire rod is improved. The whole shielding layer is not damaged, so that the shielding effect of the whole transmission line cannot be reduced. The shielding layer is used for transmitting 0V signals, so that the number of wire cores of the wire can be reduced, and the cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a D type data interface connecting wire with shield which characterized in that: the D type data interface connecting wire with the shielding comprises a connecting cable, a first connecting terminal and a second connecting terminal, one end of the connecting cable is connected with one end of the first connecting terminal, the other end of the connecting cable is connected with one end of the second connecting terminal, a reference level pin of the first connecting terminal is connected with one end of a shielding net of the connecting cable, and a reference level pin of the second connecting terminal is connected with the other end of the shielding net of the connecting cable.
2. The shielded D-type data interface connection cable according to claim 1, wherein the connection cable comprises a plurality of cable cores with insulating layers, a composite film layer, a shielding layer and a cable surface layer, the cable cores are wrapped in the composite film layer after being mixed, the shielding layer is sleeved on the composite film layer, and the cable surface layer is sleeved on the shielding layer.
3. The shielded D-type data interface connection cable according to claim 2, wherein the shielding layer is a shielding mesh.
4. The shielded D-type data interface connection cable according to claim 3, wherein the composite film layer is made of a composite aluminum film.
5. The shielded D-type data interface connection cable of claim 4, wherein the cable cover is made of cable plastic.
6. The shielded D-type data interface connection cable according to any one of claims 1 to 5, wherein the first connection terminal and the second connection terminal are identical, and include a connection terminal body, connection screws disposed on both sides of the connection terminal body, and a plurality of pins disposed in the connection terminal body, wherein one of the plurality of pins is a reference level pin.
7. The shielded D-type data interface connection cable according to claim 6, wherein the plurality of pins are uniformly arranged in the connection terminal body, and the distance between two pins adjacent to each other on the left and right is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122230999.7U CN215911683U (en) | 2021-09-14 | 2021-09-14 | D type data interface connecting wire with shielding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122230999.7U CN215911683U (en) | 2021-09-14 | 2021-09-14 | D type data interface connecting wire with shielding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215911683U true CN215911683U (en) | 2022-02-25 |
Family
ID=80309494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122230999.7U Active CN215911683U (en) | 2021-09-14 | 2021-09-14 | D type data interface connecting wire with shielding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215911683U (en) |
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2021
- 2021-09-14 CN CN202122230999.7U patent/CN215911683U/en active Active
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