High-resolution transmission device for flexible flat cable (FFC)

Abstract

The utility model discloses an FFC flexible flat cable high resolution transmission device, which relates to the FFC flat cable technology field, and comprises a connector main body and an interface slot, the interface slot is provided with a flat cable main body, and the joint of the flat cable main body and the interface slot is provided with a flat cable protection mechanism. The flat cable protection mechanism comprises a contraction cylinder, a straight cylinder and an expansion cylinder which sleeve one end, close to the interface slot, of the flat cable main body, the contraction cylinder and the expansion cylinder are positioned on two sides of the straight cylinder and are arranged in a mirror image manner, and the longitudinal sections of the expansion cylinder and the straight cylinder are semicircles which are gradually reduced towards the straight cylinder; according to the utility model, a progressive protection channel is formed through the flat cable protection mechanism composed of the contraction cylinder, the straight cylinder and the expansion cylinder, the diameter of the inlet end of the contraction cylinder is large, flat cables can enter smoothly, and the semi-arc-shaped raised lines on the inner wall of the straight cylinder are made of elastic rubber materials, so that the frictional wear between the flat cables and the channel is reduced, and the service life of the flat cables is prolonged. And the outlet end of the expansion cylinder is gradually expanded, so that the bending stress of the flat cable is effectively relieved.

Description

Technical Field

[0001] This utility model relates to the field of FFC cable technology, specifically to a high-resolution transmission device for FFC flexible cables. Background Technology

[0002] FFC (Flexible Flat Cable) cables are widely used in high-resolution signal transmission in electronic devices due to their advantages such as small size, light weight, and flexibility, including internal connections in LCD screens, camera modules, printers, and various precision electronic devices. However, existing FFC flexible cables still have some technical defects in practical applications, especially in terms of insufficient mechanical strength and durability at the interface.

[0003] Traditional FFC cables typically use simple plug-in or soldering methods to fix the interface. However, due to the softness of the FFC cable itself, local stress concentration can easily occur at the interface during frequent plugging and unplugging or equipment vibration and bending, leading to bending, breakage or poor contact of the cable, which in turn affects the stability and reliability of signal transmission. Especially in high-resolution, high-speed signal transmission applications, signal integrity places higher demands on the mechanical stability and electrical performance of the connector, and the interface design of existing FFC cables often fails to meet these requirements. Utility Model Content

[0004] The purpose of this invention is to provide a high-resolution transmission device for FFC flexible flat cable to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-resolution transmission device for FFC flexible ribbon cable, including a connector body and an interface slot. The interface slot is equipped with the ribbon cable body, and a ribbon cable protection mechanism is provided at the junction of the ribbon cable body and the interface slot. The ribbon cable protection mechanism includes a shrinking cylinder, a straight cylinder, and an expanding cylinder sleeved on one end of the ribbon cable body near the interface slot. The shrinking cylinder and the expanding cylinder are located on both sides of the straight cylinder and are arranged in a mirror image. The longitudinal section of the expanding cylinder and the straight cylinder is a semi-circle that gradually decreases towards the straight cylinder.

[0006] Furthermore, mounting blocks are fixedly installed on both sides of the shrinking cylinder, the straight cylinder, and the expanding cylinder. There are two shrinking cylinders, the straight cylinder, and the expanding cylinder, which are arranged horizontally and symmetrically, and together form a mounting cavity.

[0007] Furthermore, several semi-circular protrusions are installed on the contact surface between the straight cylinder and the main body of the cable.

[0008] Furthermore, the mounting block has mounting holes.

[0009] Furthermore, the main body of the cable is provided with copper wires, which are multiple thin copper wires connected in parallel.

[0010] Furthermore, between the inner arc wall and the outer arc wall where the main body of the cable connects to the copper wire, an insulation layer, a heat dissipation layer, a shielding layer, a reinforcement layer, a wave-absorbing layer, and a protective outer layer are sequentially provided.

[0011] Furthermore, the insulating layer is formed by stacking multiple polyimide films, the heat dissipation layer is made of graphite sheet, and the shielding layer is made of mesh aluminum foil.

[0012] Furthermore, the reinforcing layer is made of aramid fiber and arranged in a spiral shape, the wave-absorbing layer is made of carbon fiber, and the protective outer layer is made of thermoplastic polyurethane.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model forms a progressive protection channel through a cable protection mechanism composed of a shrinking cylinder, a straight cylinder, and an expanding cylinder. The inlet end of the shrinking cylinder has a large diameter, which facilitates the smooth entry of the cable. The semi-circular convex strip on the inner wall of the straight cylinder is made of elastic rubber, which reduces the friction and wear between the cable and the channel. The gradually expanding outlet end of the expanding cylinder effectively alleviates the bending stress of the cable, thereby improving the service life and reliability of the cable.

[0015] 2. This utility model incorporates a multi-layered structure between the main body of the ribbon cable and the copper wire, including an insulation layer, a heat dissipation layer, a shielding layer, a reinforcement layer, a wave-absorbing layer, and a protective outer layer. The selection and design of materials for each layer fully consider the electrical performance, mechanical performance, and environmental adaptability of the ribbon cable. The insulation layer has excellent insulation and high-temperature resistance, ensuring that the ribbon cable can work normally in high-temperature environments. The heat dissipation layer quickly dissipates the heat generated by the copper wire, preventing the ribbon cable from overheating. The shielding layer effectively shields external electromagnetic interference, ensuring stable signal transmission. The reinforcement layer greatly enhances the tensile strength and wear resistance of the ribbon cable. The wave-absorbing layer further reduces the impact of external interference on signal transmission. The protective outer layer has excellent wear resistance and anti-aging properties, protecting the ribbon cable from damage caused by the external environment. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main body of a high-resolution transmission device using FFC flexible flat cable;

[0017] Figure 2 This is a schematic diagram of the structure of one end of the interface slot of the main body of an FFC flexible flat cable high-resolution transmission device;

[0018] Figure 3 This is a schematic diagram of the cable protection mechanism in a high-resolution FFC flexible cable transmission device.

[0019] Figure 4 This is a cross-sectional view of the main body of the FFC flexible flat cable high-resolution transmission device.

[0020] In the picture:

[0021] 1. Cable body; 2. Connector body; 3. Interface slot; 4. Shrink tube; 5. Straight tube; 6. Expansion tube; 7. Mounting block; 8. Mounting hole; 9. Semi-circular protrusion; 10. Copper wire; 11. Insulation layer; 12. Heat dissipation layer; 13. Shielding layer; 14. Reinforcing layer; 15. Wave absorbing layer; 16. Protective outer layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] See Figure 1 , Figure 2 and Figure 3 As shown, a high-resolution transmission device for FFC flexible ribbon cable includes a connector body 2 and an interface slot 3. The interface slot 3 is fitted with a ribbon cable body 1. A ribbon cable protection mechanism is provided at the junction of the ribbon cable body 1 and the interface slot 3. The ribbon cable protection mechanism includes a shrinking cylinder 4, a straight cylinder 5, and an expanding cylinder 6 fitted onto one end of the ribbon cable body 1 near the interface slot 3. The shrinking cylinder 4 and the expanding cylinder 6 are located on both sides of the straight cylinder 5 and are arranged in a mirror image. The longitudinal section of the expanding cylinder 6 and the straight cylinder 5 is a semi-circle that gradually decreases towards the straight cylinder 5. Mounting blocks 7 are fixedly installed on both sides of the shrinking cylinder 4, the straight cylinder 5, and the expanding cylinder 6. There are two shrinking cylinders 4, the straight cylinder 5, and the expanding cylinder 6, which are arranged horizontally and symmetrically and together form a mounting cavity. Several semi-arc-shaped protrusions 9 are installed on the contact surface between the straight cylinder 5 and the ribbon cable body 1. The mounting blocks 7 have mounting holes 8.

[0025] In the specific implementation process, the connector body 2 and the interface groove 3 form a basic frame. The cable body 1 is inserted into the connector body 2 through the interface groove 3 to achieve electrical connection. It consists of a shrink tube 4, a straight tube 5 and an expansion tube 6, which are symmetrically distributed on both sides of the access end of the cable body 1 to form a progressive protection channel. The inlet end of the shrink tube 4 has a larger diameter to guide the cable body 1 to enter smoothly. The inner wall of the straight tube 5 is provided with a semi-circular protrusion 9, which is made of elastic rubber material. The elastic contact reduces the friction and wear of the cable. The outlet end of the expansion tube 6 is gradually widened to relieve the bending stress of the cable. Two mounting holes 8 are used to install and remove the two horizontally symmetrical shrink tubes 4, straight tubes 5 and expansion tubes 6.

[0026] See Figure 1 and Figure 4 As shown, the main body 1 of the ribbon cable has a copper wire 10 inside. The copper wire 10 consists of multiple thin copper wires connected in parallel. Between the inner arc wall and the outer arc wall where the main body 1 of the ribbon cable connects to the copper wire 10, there are sequentially an insulating layer 11, a heat dissipation layer 12, a shielding layer 13, a reinforcing layer 14, a wave-absorbing layer 15, and a protective outer layer 16. The insulating layer 11 is formed by stacking multiple polyimide films, the heat dissipation layer 12 is made of graphite sheet, the shielding layer 13 is made of mesh aluminum foil, the reinforcing layer 14 is made of aramid fiber and arranged in a spiral shape, the wave-absorbing layer 15 is made of carbon fiber, and the protective outer layer 16 is made of thermoplastic polyurethane.

[0027] In the specific implementation process, the main body 1 of the ribbon cable contains copper wires 10, which serve as the main carrier for signal transmission. The copper wires 10 are multiple thin copper wires connected in parallel, which increases the cross-sectional area for current flow, reduces resistance, and improves transmission efficiency. Between the inner and outer arc walls where the main body 1 of the ribbon cable connects to the copper wires 10, a multi-layer structure is sequentially provided to provide comprehensive protection and functional support. The insulation layer 11 is formed by stacking multiple layers of polyimide film, which has good insulation performance and prevents short circuits between the copper wires 10 and the outside environment. The polyimide film also has excellent high-temperature resistance, ensuring that the ribbon cable can work normally in high-temperature environments. The heat dissipation layer 12 is made of graphite sheet material, which has good thermal conductivity and can quickly dissipate the heat generated by the copper wires 10 to prevent the ribbon cable from overheating. The shielding layer 13 is made of mesh aluminum foil material, which can effectively shield the external environment. Electromagnetic interference is mitigated, ensuring stable signal transmission. The mesh design of the shielding layer 13 provides excellent shielding while maintaining a degree of flexibility. The reinforcing layer 14, made of aramid fiber arranged in a spiral pattern, significantly enhances the tensile strength and abrasion resistance of the cable. Aramid fiber possesses extremely high strength and toughness, making the cable less prone to breakage when subjected to external pulling or bending. The absorbing layer 15, made of carbon fiber, absorbs some electromagnetic waves, further reducing the impact of external interference on signal transmission. Carbon fiber is also lightweight and high-strength, helping to reduce the weight of the cable. The protective outer layer 16, made of thermoplastic polyurethane, has excellent abrasion resistance and anti-aging properties, protecting the cable from environmental damage. Thermoplastic polyurethane also has a certain degree of elasticity, allowing the cable to maintain its shape and performance when bent or twisted.

[0028] It should be noted that: the graphite heat dissipation layer 12 and the spiral reinforcement layer 14 form a three-dimensional heat conduction channel, which, together with the current equalization design of the copper wire 10, controls the temperature rise to ΔT < 8℃. The mesh aluminum foil shielding layer 13 and the carbon fiber absorbing layer 15 constitute a "reflection-absorption" dual protection, which can suppress crosstalk to below -70dB in the 10GHz high-frequency band. The aramid fiber reinforcement layer 14 adopts a spiral arrangement, which can reduce the bending radius of the ribbon cable to 3mm. Each functional layer is formed by hot pressing composite process. The mesh size of the shielding layer 13 and the fiber orientation of the reinforcement layer 14 need to maintain a 30° angle to optimize the isotropic electromagnetic shielding.

[0029] Working principle:

[0030] Step 1: The connector body 2 and the interface slot 3 form a basic frame. The ribbon cable body 1 is inserted into the connector body 2 through the interface slot 3 to achieve electrical connection. The ribbon cable protection mechanism consists of a shrink cylinder 4, a straight cylinder 5 and an expansion cylinder 6, which are symmetrically distributed on both sides of the access end of the ribbon cable body 1 to form a progressive protection channel. The inlet end of the shrink cylinder 4 has a larger diameter to guide the ribbon cable body 1 to enter smoothly. The inner wall of the straight cylinder 5 is provided with a semi-circular protrusion 9 made of elastic rubber material to reduce the friction and wear of the ribbon cable through elastic contact. The outlet end of the expansion cylinder 6 is gradually widened to relieve the bending stress of the ribbon cable.

[0031] Step Two: The main body 1 of the ribbon cable contains multiple parallel copper wires 10, which serve as the main carrier for signal transmission. This increases the cross-sectional area for current flow, reduces resistance, and improves transmission efficiency. The insulation layer 11 prevents the copper wires 10 from short-circuiting with the outside environment and has good high-temperature resistance. The heat dissipation layer 12 quickly dissipates the heat generated by the copper wires 10, preventing the ribbon cable from overheating. The shielding layer 13 effectively shields external electromagnetic interference, ensuring stable signal transmission. The reinforcement layer 14 greatly enhances the tensile strength and wear resistance of the ribbon cable. The wave-absorbing layer 15 absorbs some electromagnetic waves, further reducing the impact of external interference on signal transmission. The outer protective layer 16 has good wear resistance and anti-aging properties, protecting the ribbon cable from damage caused by the external environment.

[0032] Step 3: The graphite heat dissipation layer 12 and the spiral reinforcement layer 14 form a three-dimensional heat conduction channel. Combined with the current equalization design of the copper wire 10, the temperature rise is controlled at ΔT < 8℃. The mesh aluminum foil shielding layer 13 and the carbon fiber absorbing layer 15 constitute a "reflection-absorption" dual protection, which can suppress crosstalk to below -70dB in the 10GHz high-frequency band. The aramid fiber reinforcement layer 14 adopts a spiral arrangement, which can reduce the bending radius of the cable to 3mm and improve the flexibility of the cable. Each functional layer is formed by hot pressing composite process to ensure tight bonding between layers. The mesh size of the shielding layer 13 and the fiber orientation of the reinforcement layer 14 maintain a 30° angle to optimize the isotropy of electromagnetic shielding.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-resolution transmission device of FFC flexible flat cable, comprising a connector body (2) and an interface slot (3), the interface slot (3) is installed with a cable body (1), characterized in that, The cable body (1) is provided with a cable protection mechanism at the joint of the interface slot (3), the cable protection mechanism comprises a contraction cylinder (4) sleeved on one end of the cable body (1) close to the interface slot (3), a straight cylinder (5) and an expansion cylinder (6), the contraction cylinder (4) and the expansion cylinder (6) are located on both sides of the straight cylinder (5) and are mirror image arranged, and the longitudinal section of the expansion cylinder (6) and the straight cylinder (5) is a semicircle gradually decreasing towards the straight cylinder (5).

2. The FFC flexible flat cable high-resolution transmission device according to claim 1, characterized in that: The contraction cylinder (4), the straight cylinder (5) and the expansion cylinder (6) are fixedly installed with mounting blocks (7) on both sides, the number of the contraction cylinder (4), the straight cylinder (5) and the expansion cylinder (6) is two and they are horizontally symmetrically arranged and jointly enclosed into a mounting cavity.

3. The FFC flexible flat cable high-resolution transmission device according to claim 2, characterized in that: The joint surface of the straight cylinder (5) and the cable body (1) is installed with a plurality of semicircular convex strips (9).

4. The FFC flexible flat cable high-resolution transmission device of claim 3, wherein: The mounting block (7) is provided with a mounting hole (8).

5. The FFC flexible flat cable high-resolution transmission device according to claim 4, characterized in that: The cable body (1) is internally provided with copper wires (10), and the copper wires (10) are a plurality of thin copper wires arranged in parallel.

6. The FFC flexible flat cable high-resolution transmission device according to claim 5, characterized in that: The inner arc wall to the outer arc wall of the joint of the cable body (1) and the copper wire (10) is sequentially provided with an insulation layer (11), a heat dissipation layer (12), a shielding layer (13), an enhancement layer (14), a wave absorbing layer (15) and a protective outer layer (16).

7. The FFC flexible flat cable high-resolution transmission device according to claim 6, characterized in that: The insulation layer (11) is a multi-layer polyimide film formed by laminating, the heat dissipation layer (12) is a graphite sheet material, and the shielding layer (13) is a mesh-shaped aluminum foil material.

8. The FFC flexible flat cable high-resolution transmission device according to claim 7, characterized in that: The enhancement layer (14) is an aramid fiber material and is arranged in a spiral shape, the wave absorbing layer (15) is a carbon fiber material, and the protective outer layer (16) is a thermoplastic polyurethane material.

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