TWM609698U - Data transmission cable - Google Patents

Abstract

The present invention provides a data transmission cable, which includes a plurality of signal wire groups arranged at intervals, and a metal shield film for fixing the plurality of signal wire groups together. Wherein, each of the signal wire groups has at least one pair of signal wires arranged side by side and a plastic layer integrally covering the aforementioned at least one pair of signal wires. The metal mask film has a width not less than the sum of the circumferential extension lengths of the plurality of signal wire groups, and covers each of the signal wire groups.

Description

Data transmission cable

This creation relates to a data transmission cable, in particular to a data transmission cable with stable transmission performance.

In the 3C industry, a transmission cable can be used as a medium for electrical connection between two electronic devices, and can perform expected signal transmission operations stably. Therefore, transmission cables are widely used in various electronic devices. Among them, transmission cables connected to interfaces such as USB, HDMI, DVI, Displayport, SAS have high transmission rate, long distance, and high quality, and are popular with the public, and the number of use is also increasing. The transmission cables have multiple metal wires inside, and the multiple metal wires are generally only fixed by the outer Mylar layer in a cylindrical shape, and are arranged without a shield, so that the signal transmission stability of the entire transmission cable is poor.

In view of this, it is indeed necessary to improve the conventional technology to solve the above-mentioned problems.

The purpose of this creation is to provide a data transmission cable with stable transmission performance.

In order to achieve the above-mentioned object, the present creation provides a data transmission cable, which includes a plurality of signal wire groups arranged at intervals, and a metal mask film that fixes the plurality of signal wire groups together, wherein each of the signal wires The group has at least one pair of signal wires arranged side by side and a plastic layer integrally covering the aforementioned at least one pair of signal wires, the metal mask film has a width not less than the sum of the circumferential extension lengths of the plurality of signal wire groups, and Covering each of the signal wire groups.

Further, the length of the metal mask film is set to be no less than the length of the data transmission cable.

Further, the two ends of the metal mask film in the width direction are tightly bonded to each other on one side in the width direction of the data transmission cable.

Further, the metal mask film has a covering part covering the periphery of each of the signal wire groups and a pressing part connecting the covering parts, and the covering parts are bonded to the periphery of the signal wire group from the upper and lower sides facing each other , The pressing part is pressed and pressed together in the up and down direction.

Further, the data transmission cable further includes a ground wire arranged adjacent to the signal wire group, and the metal mask film simultaneously covers the ground wire.

Further, the ground wire is spaced apart from an adjacent signal wire group, the metal mask film has a covering part adhered to the ground wire from the upper and lower sides facing each other, and the pressing part includes the metal The mask film is connected to the part between the covering part and the covering part.

Further, the ground wire is arranged on one side or both sides of all signal wire groups, and/or between adjacent signal wire groups.

Further, the center lines of the ground wire and all the signal wires in the signal wire group are located on the same plane.

Further, the metal mask film has at least an aluminum foil layer and a bonding layer disposed on the side of the aluminum foil layer facing the plastic layer, and the metal mask film is bonded and fixed to the outside of the plastic layer by the bonding layer after heat fusion.

Further, the metal mask film also has an insulating layer disposed on the surface of the aluminum foil layer facing away from the plastic layer.

The beneficial effect of this creation is that the metal mask film of this creation has a width not less than the circumferential extension length of the data transmission cable, and wraps each signal wire group in the circumferential direction of the signal wire group to provide each signal The wire group has a better signal transmission environment; in addition, the metal mask film can be All the transmission wires are covered and fixed at one time in the width direction, which is not only convenient for covering and fixing, and the shielding effect is better, but also enables continuous and stable signal transmission.

100: Data transmission cable

1: Signal wire group

2: Metal mask film

11: Signal wire

12: Plastic layer

21: Covering part

22: Compression part

23: Covering part

3: Ground wire

201: aluminum foil layer

202: Adhesive layer

Fig. 1 is a partial three-dimensional diagram of the first preferred embodiment of the authoring data transmission cable.

Fig. 2 is a front view of the data transmission cable shown in Fig. 1.

Figures 3 to 9 show schematic cross-sectional views of other preferred embodiments of the authored data transmission cable.

The present creation relates to a flat data transmission cable 100. The data transmission cable 100 includes a plurality of signal wire groups 1 arranged at intervals and a metal shield film 2 for fixing the plurality of signal wire groups 1 together. Wherein, each of the signal wire groups 1 has at least one pair of signal wires 11 arranged side by side, and a plastic layer 12 integrally covering the aforementioned at least one pair of signal wires 11, and the metal mask film 2 has no less than a plurality of The width of the sum of the circumferential extension lengths of the signal wire group 1 and wraps each of the signal wire groups 1 in the circumferential direction of the signal wire group 1.

Preferably, the length of the metal shielding film 2 is set to be no less than the length of the data transmission cable 100, so that the metal shielding film 2 can be integrally covered and arranged to further ensure the shielding of the metal shielding film Continuity, to avoid any impedance discontinuity, so that the signal transmission can continue and stably proceed. In addition, the metal shielding film 2 also has a fire-proof function, which can make the data transmission cable 100 reach the horizontal flame-retardant grade FT-2 and the vertical flame-retardant grade VW-1.

Specifically, please refer to FIGS. 1 and 2 together. FIGS. 1 and 2 show the first preferred embodiment of the creative data transmission cable 100. This embodiment mainly takes the data transmission cable 100 including two signal wire groups 1 as an example for description; each signal wire group 1 has a pair of signal wires 11, and the pair of signal wires 11 constitute a differential signal for transmitting differential signals. Signal wire group. The plastic layer 12 is integrally wrapped around the pair of signal wires 11 to ensure the position setting and insulation protection of the pair of signal wires 11.

Wherein, the plastic layer 12 is preferably made of a plastic material with a dielectric constant close to air, so that the impedance of the plastic layer 12 can be made smaller, thereby providing a better signal transmission environment for the signal wire 11 and reducing signal propagation delay. Reduce crosstalk between signals, ensure high-speed and effective signal transmission, and reduce signal attenuation. This kind of plastic layer 12 can be made of polyhydrocarbon compound, and further, the polyhydrocarbon compound is preferably high-density polyethylene.

After the pair of signal wires 11 are covered with a plastic layer 12, in the thickness direction of the data transmission cable 100, the upper and lower sides of the plastic layer 12 are in a parallel plane shape. Refers to the upper and lower surfaces between the center of a pair of signal wires; and in the width direction of the data transmission cable 100, the outer surface of the plastic layer 12 outside the center of the pair of signal wires 11 is round It is arc-shaped and arranged concentrically with the center of the signal wire 11, so as not only to facilitate the application of the metal mask film 2, but also to ensure the consistency of the distance between the signal wire 11 and the metal mask film 2 to promote signal transmission The stability.

It can be seen from the drawings that the two ends of the metal mask film 2 in the width direction are pressed against each other on one side in the width direction of the data transmission cable 100, that is, after the metal mask film 2 is folded in half, the signal The two sides of the wire group 1 are coated, and the coated middle part and the excess part are respectively pressed and fitted and fixed. In this embodiment, the metal mask film 2 has a covering part 21 covering the periphery of each of the signal wire groups 1 and a pressing part 22 connecting the covering parts 21. The covering parts 21 are bonded to the signal wire group 1 from the upper and lower sides, and the pressing parts 22 are pressed against each other in the up and down direction, so that the signal wire group 1 is covered by metal as much as possible Film 2 covers all.

In combination with the position of the arc-shaped outer surface of the plastic layer 12, the metal mask film 2 can be attached from the covering part 21 to the pressing part 22 when the above-mentioned metal mask film 2 is attached to the signal wire group 1 up and down. The transition is smoother, making the fit better.

Further, as shown in FIGS. 1 and 2, the data transmission cable 100 further includes a ground wire 3 arranged adjacent to the signal wire group 1, and the metal mask film 2 simultaneously covers the ground wire 3. Specifically, in this embodiment, the ground wire 3 is spaced apart from the adjacent signal wire group 1, and the metal mask film 2 also has coatings bonded to the ground wire 3 from the upper and lower sides facing each other. Part 23, the pressing part 22 includes the part where the metal mask film 2 is connected between the covering part 23 and the covering part 21.

In addition, in this embodiment, the ground wires 3 are provided on both sides of each signal wire group 1, thereby providing a better transmission environment for each signal wire group 1, especially as a differential During signal transmission, the stability of high-frequency transmission is ensured.

Of course, as other implementations of this creation, as shown in FIGS. 3 to 9, the grounding wire 3 can also be arranged on one side or both sides of all the signal wire groups 1 according to the transmission environment or transmission requirements of the signal wire 11 , And/or between adjacent signal wires 11, or no ground wire 3 is required.

When the aforementioned ground wire 3 is set, the center lines of the ground wire 3 and all the signal wires 11 in the signal wire group 1 are located on the same plane.

In addition, in this creation, the metal mask film 2 can preferably be configured to include at least an aluminum foil layer 201 and an adhesive layer 202 disposed on the side of the aluminum foil layer 201 facing the plastic layer 12. The bonding layer 202 is bonded and fixed to the outside of the plastic layer 12 or bonded to each other after being thermally melted. This makes the fixing operation of the metal mask film 2 simple and convenient, and does not require the intervention of the Mylar layer to fix, so that the entire cable can be made thinner and softer; and the air can be discharged during bonding. Adopt hot-melt bonding to fix, increase the bonding strength and tightness of the metal mask film 2 and the plastic layer 12, so that the exhausted air cannot enter, achieve a compact effect, and then achieve a tight coating, good high-frequency transmission performance, soft and thin Effect.

Furthermore, the metal mask film 2 described in this creation also has an insulating layer disposed on the surface of the aluminum foil layer 201 on the side facing away from the plastic layer 12. The insulating layer can replace the Mylar layer in the prior art to insulate the outside. , And protect the aluminum foil layer 201. Of course, the data transmission cable 100 described in the present invention may further be provided with a Mylar layer outside the metal layer 3.

In summary, the metal mask film 2 in this creation has a width not less than the circumferential extension length of the data transmission cable 100, and wraps each of the signal wire groups in the circumferential direction of the signal wire group 11 to provide each signal wire group. A signal wire group 11 has a better signal transmission environment, and the metal mask film 2 can realize a one-time covering and fixing of all transmission wires in the width direction, which is not only convenient for covering and fixing, but also has a better shielding effect. And it enables continuous and stable signal transmission.

In particular, it needs to be pointed out that for ordinary skilled artisans in the field, the equivalent changes made to the creation under the teaching of this creation should still be included in the scope of the patent application for this creation.

100: Data transmission cable

1: Signal wire group

2: Metal mask film

3: Ground wire

Claims (10)

A data transmission cable includes a plurality of signal wire groups arranged at intervals and a metal shield film for fixing the plurality of signal wire groups together; wherein each of the signal wire groups has at least one pair of signal wires arranged side by side And the plastic layer integrally covering the aforementioned at least one pair of signal wires, the metal mask film has a width not less than the sum of the circumferential extension lengths of the plurality of signal wire groups, and covers each of the signal wire groups. According to the data transmission cable described in item 1 of the scope of patent application, the length of the metal mask film is set to be no less than the length of the data transmission cable. The data transmission cable described in the first item of the scope of patent application, wherein the two ends of the metal mask film in the width direction are compressed and bonded to each other on one side in the width direction of the data transmission cable. According to the data transmission cable described in claim 1, wherein the metal mask film has a covering part covering the periphery of each of the signal wire groups and a pressing part connecting the covering part, the covering part is self-contained The upper and lower two sides are bonded to each other around the signal wire group, and the pressing part is pressed and pressed together in the vertical direction. According to the data transmission cable described in item 4 of the scope of patent application, the data transmission cable further includes a ground wire arranged adjacent to the signal wire group, and the metal mask film simultaneously covers the ground wire. According to the data transmission cable described in item 5 of the scope of patent application, wherein the ground wire is spaced apart from the adjacent signal wire group, and the metal mask film has a package bonded to the ground wire from the upper and lower sides facing each other. The covering part, the pressing part includes a part of the metal mask film connected between the covering part and the covering part. According to the data transmission cable described in item 5 of the scope of patent application, the grounding wire is arranged on one side or both sides of all signal wire groups, and/or between adjacent signal wire groups. In the data transmission cable described in item 7 of the scope of patent application, the center lines of the ground wire and all signal wires in the signal wire group are located on the same plane. The data transmission cable according to any one of items 1 to 8 of the scope of the patent application, wherein the metal shield film has at least an aluminum foil layer and an adhesive layer disposed on the side of the aluminum foil layer facing the plastic layer, and the metal shield The film is bonded and fixed on the outer side of the plastic layer by heat fusion of the bonding layer. According to the data transmission cable described in item 9 of the scope of patent application, the metal mask film further has an insulating layer disposed on the surface of the aluminum foil layer facing away from the plastic layer.

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