End structure of flexible flat cable

Abstract

The utility model discloses an end structure of flexible flat cable belongs to wire and cable technical field. The structure includes a plurality of parallel arrangement's conductor, the insulating film of cladding conductor and set up in the reinforcing plate of cable at least one end. The insulating film of cable end is stripped and forms the bare copper area, and the reinforcing plate includes the upper reinforcing plate and lower reinforcing plate, and symmetrically adheres to the upper and lower surface of bare copper area and its adjacent area. The length of reinforcing plate is greater than the length of bare copper area, makes its one part cover on the conductor, and another part covers on the insulating film that has not been stripped. The structure has strengthened the cohesive force of reinforcing plate and cable, effectively prevented the reinforcing plate from falling off and the conductor from breaking, improved the mechanical durability and connection reliability of cable. In addition, the cable end can also set up the sub -stock wire harness and wrap high temperature insulating tape, further promote the anti -tugging and insulating performance.

Description

Technical Field

[0001] This utility model belongs to the field of wire and cable technology, and specifically relates to an end structure of a flexible flat cable. Background Technology

[0002] Flexible flat cables (FFCs) are widely used in the internal connections of electronic devices such as printers, scanners, laptops, and LCD TVs due to their small size, light weight, and good flexibility. FFCs typically achieve circuit connections by directly inserting the bare copper conductors at their ends into the slots of a connector.

[0003] To facilitate insertion, existing FFC (Flying Cable Connector) ends typically have a section of insulation film peeled off to expose the conductor, and a reinforcing plate is attached to this area to increase the end's rigidity. However, traditional reinforcing plate designs often have the following problems: insufficient bonding strength between the reinforcing plate and the bare copper area, making it prone to warping or detachment from the edge during repeated insertions and removals or under bending stress; the junction between the reinforcing plate edge and the insulation film and conductor is a stress concentration point, easily leading to conductor breakage; furthermore, the cable end lacks effective protection after branching, resulting in weak tensile strength.

[0004] Therefore, there is an urgent need for a new FFC end structure to solve the above problems and improve the mechanical durability and connection reliability of the cable. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides an end structure for a flexible flat cable. By optimizing the arrangement of the reinforcing plate, the mechanical strength of the plug end is effectively enhanced, preventing the reinforcing plate from falling off and the conductor from breaking.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An end structure for a flexible flat cable is provided, comprising: a plurality of parallel conductors; an insulating film covering all conductors; and a reinforcing plate disposed at at least one end of the cable, wherein the insulating film at the cable end is peeled off to form a bare copper area; the reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate, symmetrically attached to the upper and lower surfaces of the bare copper area and its adjacent areas; the length of the reinforcing plate is greater than the length of the bare copper area, such that a portion of the reinforcing plate covers the conductors of the bare copper area, and another portion covers the unpeeled insulating film.

[0007] Furthermore, the lengths S1 and S2 of the bare copper area are 3.0 ± 0.5 mm, and the length B1 of the reinforcing plate is 4.0 ± 1.0 mm.

[0008] Furthermore, the conductor at the end of the cable is stranded into several strands, and high-temperature insulating tape is wrapped at the stranding points, with the wrapping width of the high-temperature insulating tape being 5mm.

[0009] Furthermore, the total number of conductors is 18, and the stranding method is a four-strand bundle of 5, 4, 4, and 5 conductors. The spacing P between the conductors is 0.5 ± 0.05 mm, and the total width W of the cable is 9.5 ± 0.08 mm.

[0010] Furthermore, the insulating film is made of PVC, with a plug-in end thickness T of 0.3±0.03mm and a wire body thickness ST of 0.12±0.03mm.

[0011] Furthermore, the conductor has a thickness of 0.035±0.005mm, a width of 0.3±0.03mm, and a tin layer plated on its surface.

[0012] Furthermore, the reinforcing plate is made of a rubbery material with a thickness of 225 μm.

[0013] Furthermore, the length of the portion of the reinforcing plate covering the unpeeled insulating film is not less than 0.5 mm.

[0014] Furthermore, the cable is provided with the reinforcing plate at both ends, and the stranding of the conductors at both ends is symmetrical.

[0015] Furthermore, the insulating film includes a printing layer, which is a white film.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. Enhanced anchoring effect: Because the length of the reinforcing plate is greater than the length of the bare copper area, a portion of it adheres to the robust insulation film area, forming a strong "anchoring" effect. This greatly improves the bonding force between the reinforcing plate and the cable body, effectively preventing the reinforcing plate from lifting off the edges or falling off during insertion and removal.

[0017] 2. Stress Dispersion: The reinforcing plate spans the boundary between the bare copper area and the insulating film area, dispersing the stress generated by insertion, removal and bending from the fragile boundary to a larger area of ​​the reinforcing plate and insulating film, significantly reducing the risk of conductor breakage due to stress concentration at the boundary.

[0018] 3. Improved overall reliability: The design of stranded ends wrapped with high-temperature tape makes the end structure more compact, further improving tensile strength and insulation protection level, and extending the service life of the cable.

[0019] 4. High process feasibility: This structural improvement does not require complex processes and can be implemented in the existing FFC production process, making it easy to promote. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a partially enlarged cross-sectional view of the cable end connector of this utility model; Figure 2 This is a cross-sectional structural diagram of the overall cable body of this utility model; Figure 3 This is a schematic diagram illustrating the specific connection method of the cable end stranded wire harness according to this utility model; In the diagram: 1. Insulating film; 2. Reinforcing plate; 3. Conductor. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 3 The present invention provides the following technical solution: an end structure of a flexible flat cable, comprising: a plurality of parallel conductors 3; an insulating film 1 covering all conductors 3; and a reinforcing plate 2 disposed at at least one end of the cable, wherein the insulating film 1 at the cable end is peeled off to form a bare copper area; the reinforcing plate 2 includes an upper reinforcing plate and a lower reinforcing plate, which are symmetrically attached to the upper and lower surfaces of the bare copper area and its adjacent areas; the length of the reinforcing plate 2 is greater than the length of the bare copper area, such that a part of the reinforcing plate 2 covers the conductors 3 of the bare copper area, and another part covers the insulating film 1 that has not been peeled off, forming an "anchoring" structure.

[0023] like Figure 1 As shown, the lengths S1 and S2 of the bare copper area are 3.0±0.5mm, and the length B1 of the reinforcing plate 2 is 4.0±1.0mm.

[0024] The conductor 3 at the cable end is split into several strands, and high-temperature insulating tape is wrapped at the split points. The width of the high-temperature insulating tape is 5mm. It is wrapped at the split points to strengthen the fixation and improve the heat resistance insulation level of this part.

[0025] like Figure 2 and Figure 3As shown, conductor 3 has a total of 18 wires, arranged in four-strand bundles of 5, 4, 4, and 5 wires respectively. The spacing P of conductor 3 is 0.5 ± 0.05 mm, and the total width W of the cable is 9.5 ± 0.08 mm. Conductor 3 is made of tin-plated copper, with a thickness of 0.035 ± 0.005 mm and a width of 0.3 ± 0.03 mm. The surface of conductor 3 is plated with a tin layer. The number of conductors 3, N, is 18, and the spacing P is 0.5 mm. The insulating film 1 is made of a special new material, PVC. At both ends of the cable, bare copper areas with lengths S1 = 3.0 mm and S2 = 3.0 mm are peeled off. Then, blue reinforcing plates 2 with lengths B1 = 4.0 mm and B2 = 4.0 mm are precisely aligned, so that their centers are approximately aligned with the centers of the bare copper areas, thus ensuring that each end of the reinforcing plate 2 has approximately 0.5 mm of length covering the insulating film 1. Next, the 18 conductors at the end of the cable are divided into four strands of 5, 4, 4, and 5 strands, and the ends of the strands are tightly wrapped with 5mm wide high-temperature tape to enhance tensile strength and insulation performance.

[0026] The insulating film 1 is made of PVC, with a connector thickness T of 0.3±0.03mm and a wire thickness ST of 0.12±0.03mm. The insulating film 1 includes a printing layer, which is a white film.

[0027] The reinforcing plate 2 is made of a rubber material with a thickness of 225μm. The length of the portion of the reinforcing plate 2 covering the unpeeled insulating film 1 is not less than 0.5mm.

[0028] Reinforcing plates 2 are installed at both ends of the cable, and the stranding of the conductors 3 at both ends is symmetrical.

[0029] The cable has a total length TL of 190mm and a total width W of 9.5mm. This structure provides the cable connector with excellent mechanical strength and durability.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An end structure for a flexible flat cable, comprising: Multiple conductors arranged in parallel; an insulating film covering all conductors; The cable includes a reinforcing plate disposed at at least one end of the cable, wherein the insulating film at the cable end is peeled off to form a bare copper area; characterized in that the reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate, which are symmetrically attached to the upper and lower surfaces of the bare copper area and its adjacent areas; the length of the reinforcing plate is greater than the length of the bare copper area, such that a portion of the reinforcing plate covers the conductor of the bare copper area, and another portion covers the unpeeled insulating film.

2. The end structure of the flexible flat cable according to claim 1, characterized in that, The lengths S1 and S2 of the bare copper area are 3.0±0.5mm, and the length B1 of the reinforcing plate is 4.0±1.0mm.

3. The end structure of the flexible flat cable according to claim 1, characterized in that, The conductor at the end of the cable is split into several strands, and high-temperature insulating tape is wrapped at the split points. The width of the high-temperature insulating tape is 5mm.

4. The end structure of the flexible flat cable according to claim 3, characterized in that, The total number of conductors is 18, and the stranding method is a four-strand bundle of 5, 4, 4, and 5 conductors. The spacing P between the conductors is 0.5 ± 0.05 mm, and the total width W of the cable is 9.5 ± 0.08 mm.

5. The end structure of the flexible flat cable according to claim 1, characterized in that, The insulating film is made of PVC, with a plug-in end thickness T of 0.3±0.03mm and a wire body thickness ST of 0.12±0.03mm.

6. The end structure of the flexible flat cable according to claim 1, characterized in that, The conductor has a thickness of 0.035±0.005mm and a width of 0.3±0.03mm, and its surface is plated with a tin layer.

7. The end structure of the flexible flat cable according to claim 1, characterized in that, The reinforcing plate is made of a rubber material and has a thickness of 225μm.

8. The end structure of the flexible flat cable according to claim 1, characterized in that, The length of the portion of the reinforcing plate covering the unpeeled insulating film is not less than 0.5 mm.

9. The end structure of the flexible flat cable according to claim 1, characterized in that, The cable is equipped with the reinforcing plate at both ends, and the conductors at both ends are symmetrically stranded.

10. The end structure of the flexible flat cable according to claim 1, characterized in that, The insulating film includes a printed layer, which is a white film.

Images