Transmission line structure and data transmission module

Abstract

The utility model belongs to the technical field of electronic equipment discloses a transmission line structure and data transmission module. The transmission line structure includes wire body, foil and conducting cloth subassembly, the foil has conducting surface and insulating surface, at least two wire bodies are formed by foil cladding and wire group, and the insulating surface is attached to the wire body in the wire group, the conducting cloth subassembly is covered in the foil, and at least part conducting surface is attached to the conducting cloth subassembly. The foil and conducting cloth subassembly of the transmission line structure cooperate and form double shielding structure, can greatly reduce the leakage of outside electromagnetic interference and high frequency electromagnetic wave, and the conducting cloth subassembly forms low resistance conducting circuit between the foil, can conduct noise current, thereby reduces signal attenuation, greatly improves the signal transmission capacity and anti -interference ability of the transmission line structure.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to a transmission line structure and a data transmission module. Background Technology

[0002] LVDS (Low Voltage Differential Signaling) cable is one of the most important data transmission lines in a laptop computer. It connects the main circuit board of the computer to the LCD panel. The main circuit board transmits video signals or graphics data to the LCD panel through the LVDS cable so that the LCD panel can display the image.

[0003] LVDS cables typically consist of a transmission line body and an outer shielding layer. The transmission line body transmits data signals, while the shielding layer protects the data signals within the transmission line body. However, the shielding layer of LVDS cables used in computers is often made of tinned copper wire braid, which does not provide the expected shielding effect. Utility Model Content

[0004] The purpose of this invention is to provide a transmission line structure and data transmission module that can reduce external electromagnetic interference and improve signal transmission capability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Transmission line structure, including:

[0007] The conductor itself;

[0008] A foil having a conductive surface and an insulating surface, wherein at least two conductor bodies are covered by the foil to form a parallel group, and the insulating surface is attached to the conductor bodies in the parallel group;

[0009] A conductive cloth assembly, wherein the conductive cloth assembly covers the foil, and at least a portion of the conductive surface is attached to the conductive cloth assembly.

[0010] Preferably, the conductive cloth assembly includes a first conductive cloth, and the outer side of each foil of the parallel wire group is covered with the first conductive cloth, and the first conductive cloth is attached to the conductive surface.

[0011] Preferably, the conductive cloth assembly further includes a second conductive cloth, which is bundled around the outside of the first conductive cloth of the plurality of parallel groups.

[0012] Preferably, the second conductive cloth is provided in multiple portions at intervals along the length of the conductor body.

[0013] Preferably, the conductive cloth assembly further includes a third conductive cloth, which covers the outside of the first conductive cloth and the second conductive cloth. The two ends of the conductor body are respectively connected to the connector and the circuit board. One end of the third conductive cloth is connected to the circuit board, and the other end is connected to the connector.

[0014] Preferably, the conductor body includes a conductor and an insulating outer sheath wrapped around the conductor. The conductor has a first end and a second end, and the first end and the second end extend out of the insulating outer sheath respectively. The foil covers the insulating outer sheath.

[0015] Preferably, along the length of the conductor body, the distance between the end of the foil near the first end and the end of the insulating sheath near the first end is no greater than 5mm, and the distance between the end of the foil near the second end and the end of the insulating sheath near the second end is no greater than 5mm.

[0016] Preferably, the foil is aluminum foil or copper foil.

[0017] The data transmission module includes a circuit board, a connector, and the aforementioned transmission line structure. The two ends of the conductor body are respectively connected to the pads on the circuit board and the pads on the connector.

[0018] Preferably, the data transmission module further includes a grounding housing, which covers the pads of the connector and is detachably connected to the connector.

[0019] Preferably, the data transmission module further includes a ground wire, one end of which is connected to the circuit board and the other end of which is connected to the grounded housing, and the ground wire is covered with a ground wire conductive cloth.

[0020] The beneficial effects of this utility model are as follows:

[0021] The transmission line structure provided by this utility model includes a conductor body, a foil, and a conductive cloth assembly. The foil has a conductive surface and an insulating surface. The foil covers the conductor body, and the insulating surface of the foil is in contact with the conductor body. Therefore, the side of the foil facing outward is the conductive surface. Since the conductive cloth assembly is wrapped around the foil along the length of the conductor body, both the conductive cloth assembly and the foil can absorb and reflect electromagnetic waves. Together, they form a double shielding structure for the conductor body. Therefore, this transmission line structure can greatly reduce external electromagnetic interference and leakage of high-frequency electromagnetic waves. Since the conductive cloth assembly is in contact with the conductive surface, a low-resistance conductive circuit can be formed between the conductive cloth assembly and the conductive surface of the foil to conduct the noise current generated in the conductor body, thereby reducing signal attenuation in the conductor body and greatly improving the signal transmission capability and anti-interference capability of this transmission line structure. Since the foil wraps around at least two adjacent conductor bodies, making at least two conductor bodies closely attached to form an integral parallel group, the influence of edge effects is reduced, further improving the anti-interference capability of the conductor body.

[0022] The data transmission module provided by this utility model includes a circuit board, a connector, and the aforementioned transmission line structure. The two ends of the conductor body are respectively connected to the pads on the circuit board and the pads on the connector. Since the conductor body is sequentially covered with foil and conductive cloth components, this data transmission module can greatly reduce external electromagnetic interference, effectively reduce the leakage of high-frequency electromagnetic waves, and further improve signal transmission capability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the appearance of the data transmission module provided in a specific embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the data transmission module provided in a specific embodiment of this utility model;

[0025] Figure 3 This is an assembly drawing of the wire body and connector provided in a specific embodiment of this utility model;

[0026] Figure 4 This is a cross-sectional view of the conductor body provided in a specific embodiment of this utility model;

[0027] Figure 5 This is a structural schematic diagram of the connector and grounding shell provided in a specific embodiment of this utility model.

[0028] In the picture:

[0029] 100 - Circuit board;

[0030] 200 - Connector; 210 - Body; 220 - Positioning protrusion; 230 - Limiting buckle; 240 - Locking block;

[0031] 300 - Grounding outer casing; 310 - Housing; 320 - Pull rod; 330 - Slot; 340 - Positioning slot;

[0032] 400-Ground wire;

[0033] 500-ground conductive cloth;

[0034] 1-Wire body; 11-Conductor; 12-Insulating outer sheath;

[0035] 2-Foil;

[0036] 3-Conductive cloth assembly; 31-First conductive cloth; 32-Second conductive cloth; 33-Third conductive cloth; 331-First connector section; 332-Transition section; 333-Second connector section;

[0037] 4-Insulation layer. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] like Figures 1 to 4 As shown, this utility model provides a transmission line structure, which includes a conductor body 1, a foil 2, and a conductive cloth assembly 3; the foil 2 has a conductive surface and an insulating surface, at least two conductor bodies 1 are covered by the foil 2 to form a parallel group, and the insulating surface is attached to the conductor body 1 in the parallel group; the conductive cloth assembly 3 is covered by the foil 2, and at least part of the conductive surface is attached to the conductive cloth assembly 3. In this embodiment, the foil 2 is wrapped around the conductor body 1, and the insulating surface of the foil 2 is in contact with the conductor body 1. Therefore, the side of the foil 2 facing outward is the conductive surface. Since the conductive cloth assembly 3 is wrapped around the foil 2 along the length of the conductor body 1, both the conductive cloth assembly 3 and the foil 2 can absorb and reflect electromagnetic waves. Together, they form a double shielding structure for the conductor body 1. Therefore, this transmission line structure can greatly reduce external electromagnetic interference and leakage of high-frequency electromagnetic waves. Since the conductive cloth assembly 3 is in contact with the conductive surface, a low-resistance conductive circuit can be formed between the conductive cloth assembly 3 and the conductive surface of the foil 2 to conduct the noise current generated in the conductor body 1, thereby reducing the signal attenuation in the conductor body 1 and greatly improving the signal transmission capability and anti-interference capability of the transmission line structure. Since the foil 2 wraps around at least two adjacent conductor bodies 1, making at least two conductor bodies 1 closely attached to form an integral parallel group, the influence of edge effect is reduced, further improving the anti-interference capability of the conductor body 1.

[0043] Specifically, the foil 2 is made of aluminum foil or copper foil, and the conductor bodies 1 are wrapped and wound in pairs by the foil 2 to form parallel groups; the insulating side of the foil 2 is attached to the two conductor bodies 1 with its inward side facing inward, and the conductive side of the foil 2 is attached to the conductive cloth assembly 3 with its outward side facing outward. The conductive cloth assembly 3 is composed of multiple conductive cloths. The conductive cloth is a flexible conductive material commonly used in the field, which can form a low-resistance conductive circuit with the conductive side of the foil 2.

[0044] like Figure 3 and Figure 4As shown, the conductive cloth assembly 3 includes a first conductive cloth 31. The outer side of the foil 2 of each parallel group is covered with the first conductive cloth 31, and the first conductive cloth 31 is attached to the conductive surface. Specifically, the foil 2 covers the conductor body 1 along the length direction of the conductor body 1. The adhesive side of the first conductive cloth 31 is covered on the foil 2. The first conductive cloth 31 and the foil 2 together wrap and cover the conductor body 1, improving the shielding effect against external signals. At the same time, since the first conductive cloth 31 is attached to the conductive surface of the foil 2, a conductive circuit is formed between the first conductive cloth 31 and the conductive surface of the foil 2 to conduct noise current.

[0045] Furthermore, such as Figure 3 As shown, the conductive cloth assembly 3 also includes a second conductive cloth 32. The second conductive cloth 32 is bundled around the outside of the first conductive cloth 31 of multiple parallel groups. The second conductive cloth 32 binds and fixes the first conductive cloth 31 and the foil 2, so that the foil 2 and the first conductive cloth 31 maintain a sufficiently tight contact. Specifically, multiple second conductive cloths 32 are arranged at intervals along the length direction of the conductor body 1. The adhesive side of the second conductive cloth 32 is wrapped and bundled around the first conductive cloth 31 of all parallel groups, thereby binding and fixing all parallel groups. While improving the structural strength of the transmission line, it also ensures good contact between the first conductive cloth 31 and the conductive surface of the foil 2.

[0046] To further improve the transmission line structure's immunity to external signals, such as Figure 1 As shown, the conductive cloth assembly 3 also includes a third conductive cloth 33, which covers the outside of the first conductive cloth 31 and the second conductive cloth 32. The two ends of the conductor body 1 are respectively connected to the connector 200 and the circuit board 100. One end of the third conductive cloth 33 is connected to the circuit board 100, and the other end is connected to the connector 200. Specifically, the third conductive cloth 33 includes a first connector segment 331, a transition segment 332, and a second connector segment 333. The first connector segment 331 covers the connection position between the conductor body 1 and the circuit board 100, the transition segment 332 covers the main body position of the conductor body 1, and the second connector segment 333 covers the connection position between the conductor body 1 and the connector 200. The first connector segment 331, the transition segment 332, and the second connector segment 333 can be a continuous integral conductive cloth, or they can be three independent conductive cloths with the joints of adjacent segments overlapping to avoid gaps. Understandably, the third conductive cloth 33 wraps the circuit board 100, each parallel line group, the first conductive cloth 31, the second conductive cloth 32, and the connector 200 into a dense whole, covering the seam of the foil 2 and the first conductive cloth 31, thereby greatly improving the shielding effect of the conductive cloth assembly 3.

[0047] like Figure 2 and Figure 4As shown, the conductor body 1 includes a conductor 11 and an insulating sheath 12 wrapped around the conductor 11. The conductor 11 has a first end and a second end, and the first end and the second end extend out of the insulating sheath 12 respectively. The foil 2 covers the insulating sheath 12. Specifically, the conductor body 1 is a data transmission line commonly used in the art. The insulating sheath 12 is concentrically wrapped around the conductor 11. The conductor 11 is used to transmit electrical signals, and the insulating sheath 12 provides insulation and protection for the conductor 11. The conductor 11 has a first end and a second end. The first end extends out of the insulating sheath 12 and connects to the pads of the circuit board 100, and the second end extends out of the insulating sheath 12 and connects to the pads of the connector 200. The foil 2 covers the insulating sheath 12.

[0048] To reduce the risk of short circuits caused by contact between the conductor body 1 and the conductive cloth assembly 3, thereby improving the safety of the transmission line structure, such as... Figure 2 As shown, the transmission line structure also includes an insulating layer 4, which has an inner and an outer covering. Along the length of the conductor body 1, one end of the inner covering overlaps the circuit board 100, and the other end overlaps the insulating outer sheath 12. The outer covering is attached to the conductive cloth assembly 3. In this embodiment, the insulating layer 4 is a commonly used PET insulating tape, with its adhesive side being the inner covering. Along the length of the conductor body 1, both ends of the inner covering are respectively adhered to the circuit board 100 and the insulating outer sheath 12 of the conductor body 1. The outer covering of the insulating layer 4 is attached to the conductive cloth assembly 3. When the insulating outer sheath 12 retracts due to external force, the insulating layer 4 can form a barrier between the conductor 11 and the conductive cloth assembly 3, thereby preventing a short circuit. It is understood that the third conductive cloth 33 in the conductive cloth assembly 3 surrounds all the parallel wire groups; therefore, the insulating layer 4 is arranged around all the parallel wire groups corresponding to the third conductive cloth 33.

[0049] To ensure the stability of the characteristic impedance of the transmission line structure, the distance between the end of the foil 2 near the first end and the end of the insulating sheath 12 near the first end along the length of the conductor body 1 is no greater than 5 mm, and the distance between the end of the foil 2 near the second end and the end of the insulating sheath 12 near the second end is no greater than 5 mm. Specifically, the foil 2 covers at least two conductor bodies 1 to form a tightly fitted parallel group. The conductor bodies 1 at both ends of the parallel group will spread out and connect to the pads of the circuit board 100 and the connector 200, respectively. To avoid excessive spreading distance of the conductor bodies 1 in the parallel group causing uneven electromagnetic field distribution, the distance between both ends of the foil 2 and both ends of the insulating sheath 12 is no greater than 5 mm. Specifically, the foil 2 is aluminum foil or copper foil commonly used in the art.

[0050] This embodiment also provides a data transmission module, which includes a circuit board 100, a connector 200, and the aforementioned transmission line structure. The two ends of the conductor body 1 are respectively connected to the pads of the circuit board 100 and the connector 200. In this embodiment, since the conductor body 1 is sequentially covered with a foil sheet 2 and a conductive cloth assembly 3, this data transmission module can significantly reduce external electromagnetic interference, effectively reduce high-frequency electromagnetic wave leakage, and further improve signal transmission capabilities.

[0051] Furthermore, such as Figures 1 to 3 As shown, the data transmission module also includes a grounding housing 300, which covers the pads of the connector 200 and is detachably connected to the connector 200. Specifically, the grounding housing 300 covers the pads of the connector 200 and is detachably connected to the connector 200, so the grounding housing 300 can protect the connection position between the conductor body 1 and the connector 200.

[0052] Specifically, such as Figure 2 and Figure 3 As shown, the data transmission module also includes a ground wire 400. One end of the ground wire 400 is connected to the circuit board 100, and the other end is connected to the grounding housing 300. The ground wire 400 is covered with a ground wire conductive cloth 500. The grounding housing 300 is made of conductive metal. The ground wire 400 is connected to the grounding housing 300, thereby realizing the grounding of the data transmission module. The ground wire conductive cloth 500 can increase the contact area between the ground wire 400 and the grounding housing 300 to further improve the safety of the data transmission module. At the same time, it can also protect the ground wire 400 and the conductor body 1, preventing the ground wire 400 from directly contacting the conductor body 1 and damaging the insulation sheath of the conductor body 1.

[0053] Specifically, such as Figure 5As shown, the connector 200 includes a body 210 and a positioning protrusion 230. Both the solder pad and the positioning protrusion 230 are disposed on the body. A limiting block 220 is also provided on one side of the body 210 near the solder pad, forming a limiting groove between two adjacent limiting blocks 220 to limit the placement of the wire body 1. The body 210 is made of insulating material, and two snap-fit ​​blocks 240 are provided on its side for snap-fitting with the grounding housing 300. The grounding housing 300 includes a housing 310 and a pull rod 320. The rod 320 is movably mounted on the housing 310, and the grounding housing 300 can be easily pulled off the connector 200 by pulling the rod 320; the housing 310 is provided with a slot 330 corresponding to the snap-fit ​​block 240 of the connector 200, and the grounding housing 300 and the connector 200 are connected by snap-fitting the snap-fit ​​block 240 into the slot 330; the housing 310 is also provided with a positioning groove 340 corresponding to the positioning protrusion 230 of the connector 200, which can play a positioning role in the assembly of the connector 200 and the grounding housing 300.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Transmission line structure, characterized in that, include: Conductor body (1); A foil (2) having a conductive surface and an insulating surface, wherein at least two conductor bodies (1) are covered by the foil (2) to form a parallel group, and the insulating surface is attached to the conductor body (1) in the parallel group; A conductive cloth assembly (3) is provided, which covers the foil (2) and at least a portion of the conductive surface is attached to the conductive cloth assembly (3).

2. The transmission line structure of claim 1, wherein, The conductive cloth assembly (3) includes a first conductive cloth (31), and the foil (2) of each of the parallel groups is covered with the first conductive cloth (31), and the first conductive cloth (31) is attached to the conductive surface.

3. The transmission line structure of claim 2, wherein, The conductive cloth assembly (3) further includes a second conductive cloth (32), which is tied to the outside of the first conductive cloth (31) of the plurality of parallel groups.

4. The transmission line structure of claim 3, wherein, Along the length of the conductor body (1), the second conductive cloth (32) is provided with a plurality of such portions at intervals.

5. The transmission line structure of claim 4, wherein, The conductive cloth assembly (3) further includes a third conductive cloth (33), which covers the outside of the first conductive cloth (31) and the second conductive cloth (32). The two ends of the conductor body (1) are respectively connected to the connector (200) and the circuit board (100). One end of the third conductive cloth (33) is connected to the circuit board (100), and the other end is connected to the connector (200).

6. Transmission line structure according to any of claims 1-5, characterized in that The conductor body (1) includes a conductor (11) and an insulating outer sheath (12) wrapped around the conductor (11). The conductor (11) has a first end and a second end, and the first end and the second end extend out of the insulating outer sheath (12) respectively. The foil (2) covers the insulating outer sheath (12).

7. The transmission line structure of claim 6, wherein, Along the length of the conductor body (1), the distance between the end of the foil (2) near the first end and the end of the insulating outer sheath (12) near the first end is no greater than 5 mm, and the distance between the end of the foil (2) near the second end and the end of the insulating outer sheath (12) near the second end is no greater than 5 mm.

8. The transmission line structure of claim 1, wherein, The foil (2) is aluminum foil or copper foil.

9. A data transmission module, characterized in that The device includes a circuit board (100), a connector (200), and a transmission line structure as described in any one of claims 1-8, wherein the two ends of the conductor body (1) are respectively connected to the pads of the circuit board (100) and the pads of the connector (200).

10. The data transmission module of claim 9, wherein, The data transmission module further includes a grounding housing (300), which covers the pads of the connector (200) and is detachably connected to the connector (200).

11. The data transmission module of claim 10, wherein, The data transmission module also includes a ground wire (400), one end of which is connected to the circuit board (100) and the other end is connected to the grounded housing (300). The ground wire (400) is covered with a ground wire conductive cloth (500).

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