Flat wire harness transmission structure for a vehicle door

Abstract

The utility model discloses a kind of flat wire harness transmission structures for automobile door, the structure includes a bendable hollow chain, the flat FFC line of multiple stacks and is housed in the cavity of chain, and first and second mounting members are connected in chain two ends respectively, part FFC line surface selectively adheres shielding film, the utility model greatly improves tank chain space utilization, can increase more than 30 loops, and reliable structure, can effectively protect cable, satisfy the high density, high reliability layout demand of harness for the intelligent development of automobile door.

Description

Technical Field

[0001] This utility model relates to the field of automotive wiring harness technology, specifically to a flat wiring harness transmission structure applied inside automotive sliding doors. Background Technology

[0002] With the rapid development of automotive intelligence, especially new energy vehicles, the number of electronic functional modules that need to be controlled in car doors (such as speakers, microphones, sensors, indicator lights, etc.) is increasing, leading to a sharp increase in the number of signal harnesses that need to be laid. The traditional solution is to lay multiple circular electronic wires within the force transmission channel (such as a tank chain) between the door and the vehicle body. However, the internal space of a tank chain is limited, and circular cables have low fill power and large volume, severely restricting the number of wires that can be laid. Furthermore, for signals susceptible to interference, such as communication signals, additional shielded twisted-pair cables are required, further occupying valuable space and increasing the complexity and cost of the harness. Therefore, there is an urgent need for a harness solution that can improve space utilization, has high integration, and meets anti-interference requirements. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a flat wire harness transmission structure for automobile doors. By adopting stacked flat FFC wires (flexible flat cables) and a matching chain structure, it greatly improves the utilization rate of the internal space of the tank chain and can integrate shielding function.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A flat wiring harness drive structure for automobile doors, comprising:

[0006] A flexible hollow chain, the chain being composed of multiple joints connected in series via rotating parts;

[0007] Multiple flat FFC wires are stacked and housed within the cavity of the hollow chain;

[0008] The first mounting component and the second mounting component are respectively fixedly connected to both ends of the chain;

[0009] The first mounting component is used to connect to the vehicle door, and the second mounting component is used to connect to the vehicle body;

[0010] The chain extends from both ends of the FFC line and is provided with terminal connection areas.

[0011] In this technical solution, the chain is formed by multiple joints connected in series through rotating parts, creating a hollow flexible channel to accommodate and protect the flat FFC wires; multiple flat FFC wires (flexible flat cables) are stacked and housed within the cavity of the chain, serving as signal transmission carriers; a first mounting member and a second mounting member are respectively fixedly connected to both ends of the chain; the first mounting member is used for fixed connection with the car door (sliding door), and the second mounting member is used for fixed connection with the vehicle body; both ends of the FFC wires extend out of the chain and are provided with terminal connection areas for docking with the electronic module connectors of the car door / vehicle body.

[0012] It should be noted that the "FFC cable" mentioned in this article refers to a flexible cable made of a composite of a flat conductor (such as copper foil) and an insulating film layer. Its cross-section is flat, and it can be stacked in multiple layers with small gaps. The "hollow chain" is the "tank chain" commonly used in the industry, which is used to drive the wire harness to move synchronously during the opening and closing of the car door to avoid pulling and damaging the wire harness. The "terminal connection area" refers to the area at the end of the FFC cable used to mate with the connector terminal, and the conductor needs to be exposed to achieve electrical connection.

[0013] In some embodiments, the contact surface between the rotating part and the adjacent joint is a semi-circular arc surface, so that the chain forms a smooth R-angle when bent.

[0014] In some embodiments, the first or second mounting member is provided with a limiting groove made of soft material, the limiting groove being for cable ties to pass through in order to limit the binding of FFC lines extending from the side of the mounting member.

[0015] In some embodiments, the first mounting member and / or the second mounting member includes a mounting plate having a circular first mounting hole and an oblong second mounting hole.

[0016] In some embodiments, one end of the chain is rotatably connected to the first mounting member via a first pin, and the other end is rotatably connected to the second mounting member via a second pin.

[0017] In some embodiments, a shielding film is attached to the surface of a portion of the FFC line.

[0018] In some embodiments, the terminal connection area of ​​the FFC line is an exposed copper conductor for connection to a pierced terminal or a crimped terminal.

[0019] The beneficial effects of this utility model are as follows:

[0020] High space utilization: By using multiple flat FFC lines stacked together, the space utilization of the tank chain pipe cross section is greatly improved compared with traditional round cables. It can add 30 or more signal loops in the same space to meet the needs of intelligent vehicle upgrades.

[0021] Reasonable structure to protect cables: The chain joints adopt a semi-circular arc contact design, forming a natural R angle when bending, which effectively avoids the FFC cable being scratched by sharp edges or damaged by excessive bending during repeated bending, thus extending its service life.

[0022] Reliable and flexible installation: The mounting hardware features round and oblong mounting holes, ensuring installation strength while providing adjustment margins for easy on-site assembly. Dedicated limiting grooves, in conjunction with cable ties, effectively manage and secure the wire harness exit, preventing movement.

[0023] High functional integration: Shielding films can be selectively applied only to the FFC lines connecting communication terminals (such as microphones) as needed, which can effectively resist interference and avoid the increased cost of full shielding, making it more economical.

[0024] High versatility: The exposed copper design of FFC wire terminals makes it compatible with both crimped and pierced connector types, resulting in wide adaptability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the flat wire harness transmission structure of this utility model.

[0026] Figure 2 This is a planar schematic diagram of the flat wire harness transmission structure of this utility model.

[0027] Figure 3 A schematic diagram of the cross-section of an FFC line with a shielding film attached.

[0028] Explanation of the labels in the diagram:

[0029] 1-Chain, 11-Joint, 12-Rotating part, 13-First pin, 14-Second pin;

[0030] 2-FFC line, 21-terminal connection area, 22-shielding film;

[0031] 3-First mounting component, 31-Limiting groove, 32-Mounting plate, 321-First mounting hole, 322-Second mounting hole;

[0032] 4-Second mounting component.

[0033] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0034] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.

[0035] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0036] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 3 As shown, a flat wiring harness drive structure for automobile doors includes:

[0039] A flexible hollow chain 1, the chain 1 being formed by multiple joints 11 connected in series via rotating parts 12;

[0040] Multiple flat FFC wires 2 are stacked and housed within the cavity of the hollow chain 1;

[0041] The first mounting component 3 and the second mounting component 4 are respectively fixedly connected to both ends of the chain 1;

[0042] The first mounting component 3 is used to connect to the vehicle door, and the second mounting component 4 is used to connect to the vehicle body;

[0043] The chain 1 extends from both ends of the FFC line 2 and is provided with a terminal connection area 21.

[0044] In this technical solution, the chain 1 is formed by multiple joints 11 connected in series through rotating parts 12, forming a hollow flexible channel for accommodating and protecting the flat FFC wire 2; multiple flat FFC wires (flexible flat cables) are stacked and housed in the cavity of the chain 1 as signal transmission carriers; a first mounting member 3 and a second mounting member 4 are respectively fixedly connected to both ends of the chain 1; the first mounting member 3 is used for fixed connection with the car door (sliding door), and the second mounting member 4 is used for fixed connection with the vehicle body; both ends of the FFC wire extend out of the chain 1 and are provided with terminal connection areas 21 for docking with the electronic module connector of the car door / vehicle body.

[0045] Multiple flat FFC wires 2 are stacked side by side and threaded as a whole wire bundle through the cavity of chain 1.

[0046] It should be noted that the "FFC cable" mentioned in this article refers to a flexible cable made of a composite of a flat conductor (such as copper foil) and an insulating film layer. Its cross-section is flat, and it can be stacked in multiple layers with small gaps. "Hollow chain 1" is the "tank chain" commonly used in the industry, which is used to drive the wire harness to move synchronously during the opening and closing of the car door to avoid pulling and damaging the wire harness. "Terminal connection area 21" refers to the area at the end of the FFC cable used to mate with the connector terminal, and the conductor needs to be exposed to achieve electrical connection.

[0047] In some embodiments, the contact surface between the rotating part 12 and the adjacent joint 11 is a semi-circular arc surface, so that the chain 1 forms a smooth R-angle when bent.

[0048] Specifically, the chain 1 is formed by multiple plastic joints 11 connected end-to-end by a rotating part 12, creating a hollow, flexible tube. A key improvement is that the contact surface between the rotating part 12 and the adjacent joints 11 is designed as a semi-circular arc. When the chain 1 bends as the car door opens and closes, the semi-circular arc contact structure guides the chain 1 to bend along a preset arc. This structure naturally forms a smooth radius (R-angle), providing gentle bending space for the internal FFC line 2, effectively preventing scratches and damage.

[0049] Compared with existing technologies, the contact surfaces of the joints 11 of traditional tank chains are mostly flat or have a small arc design, which can easily produce sharp edges when bent, causing the internal circular cables to be scratched or excessively bent (exceeding the cable bending limit). This solution provides a gentle bending space for the FFC cable through the R-angle formed by the semi-circular arc surface, effectively avoiding damage to the insulation layer or conductor breakage of the FFC cable, and extending the service life of the harness.

[0050] In some embodiments, the first mounting member 3 or the second mounting member 4 is provided with a limiting groove 31 made of soft material, the limiting groove 31 is used for cable ties to pass through, so as to bind and limit the FFC line 2 extending from the side of the mounting member; the first mounting member 3 and / or the second mounting member 4 includes a mounting plate 32, the mounting plate 32 is provided with a circular first mounting hole 321 and an oblong second mounting hole 322.

[0051] Specifically, the soft materials are rubber and silicone, and the cable ties are nylon cable ties.

[0052] Specifically, the limiting groove 31 is integrally formed on the output end of the mounting component, and its groove width is adapted to the cable tie width: when the FFC wire is led out from the end of the chain 1, the FFC wire harness can be bundled and fixed by passing the cable tie through the limiting groove 31, preventing the wire harness from rubbing against the mounting component due to vibration during vehicle operation, or causing poor terminal contact due to movement. The circular first mounting hole 321 on the mounting plate 32 is used to realize a fixed connection (such as a rigid connection to the door / body by bolts) to ensure installation strength; the oblong second mounting hole 322 provides an adjustment margin of ±2mm, which can compensate for dimensional deviations during door / body processing or assembly, and can complete the alignment without re-drilling, improving on-site assembly efficiency.

[0053] In existing technologies, traditional mounting components mostly use a single fixing hole design with no adjustment margin, making assembly difficult; moreover, there is no dedicated limiting structure after the wire harness is led out, making it prone to movement. This solution solves the problems of wire harness fixing and assembly flexibility simultaneously through the combination of "limiting groove 31 and irregularly shaped mounting hole".

[0054] In some embodiments, one end of the chain 1 is rotatably connected to the first mounting member 3 via a first pin 13, and the other end is rotatably connected to the second mounting member 4 via a second pin 14, ensuring the flexibility of the entire structure during the movement of the door.

[0055] Specifically, the joints 11 at both ends of the chain 1 are provided with pin holes. The first pin 13 passes through the pin hole at one end of the chain 1 and the corresponding hole in the first mounting part 3, and the second pin 14 passes through the pin hole at the other end of the chain 1 and the corresponding hole in the second mounting part 4, forming a rotatable hinge structure. When the car door is opened or closed, the chain 1 can rotate freely around the pins to adapt to the angle changes between the car door and the car body, avoiding rigid tension between the chain 1 and the mounting part, and further protecting the internal FFC wire.

[0056] Traditional tank tracks and mounting components are mostly fixed connections (such as snap-fit), which can easily cause stress concentration during rotation, leading to breakage at the connection point; the pin hinge structure of this solution can disperse stress and improve transmission reliability.

[0057] In some embodiments, a shielding film 22 is attached to the surface of a portion of the FFC line 2, and the terminal connection area 21 of the FFC line 2 is an exposed copper conductor for connection with a pierced terminal or a crimped terminal.

[0058] In some of the FFC lines, a shielding film 22 (such as an aluminum-plastic composite film) is attached to the surface through a hot-pressing process. The shielding film 22 is only used for FFC lines that transmit sensitive signals (such as microphone signals and sensor signals), while FFC lines that transmit ordinary signals (such as switch signals and indicator light signals) are not attached to the shielding film 22, in order to meet the requirements for electromagnetic interference (EMI).

[0059] The terminal connection area 21 of the FFC line removes the surface insulating film through a windowing process, exposing the exposed copper conductor inside, which is used to connect with pierced terminals or crimped terminals.

[0060] Specifically, the application of the shielding film 22 adopts a selective design: only the FFC lines susceptible to electromagnetic interference are shielded, which satisfies the anti-interference requirements and avoids the increased cost caused by applying the shielding film 22 to the entire line; the width of the exposed copper conductor in the terminal connection area 21 is adapted to the terminal contact area, the piercing type terminal can directly pierce the oxide layer on the surface of the copper conductor to achieve connection, and the crimping type terminal is fixed by crimping, which is compatible with two mainstream connector types and improves versatility.

[0061] In existing technologies, traditional circular wire harnesses require separate shielding cables, which are costly and space-consuming; terminal connections require matching with dedicated terminal types, resulting in poor compatibility. This solution, through a "selective shielding and compatible terminal" design, balances interference resistance, cost, and versatility.

[0062] The installation process of this utility model is as follows: First, fix the first mounting part 3 to the car door and the second mounting part 4 to the vehicle body. Then, thread the stacked FFC wire bundle 2 through one end of the chain 1 until it comes out from the other end. Finally, connect the pins at both ends of the chain 1 to the corresponding mounting parts, and use cable ties to finally fix the wire bundle at the limiting groove 31.

[0063] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. A flat wire harness transmission structure for a vehicle door, characterized by, include: A flexible hollow chain (1), the chain (1) being formed by multiple joints (11) connected in series by a rotating part (12); Multiple flat FFC wires (2) are stacked and housed in the cavity of the hollow chain (1); The first mounting component (3) and the second mounting component (4) are respectively fixedly connected to both ends of the chain (1); The first mounting component (3) is used to connect to the door, and the second mounting component (4) is used to connect to the vehicle body; The chain (1) extends from both ends of the FFC line (2) and is provided with terminal connection areas (21).

2. The flat wire harness transmission structure according to claim 1, characterized by The contact surface between the rotating part (12) and the adjacent joint (11) is a semi-circular arc surface, so that the chain (1) forms a smooth R-angle when it is bent.

3. The flat wire harness transmission structure according to claim 1, characterized in that, The first mounting member (3) or the second mounting member (4) is provided with a limiting groove (31) made of soft material, the limiting groove (31) is used for cable ties to pass through, so as to bind and limit the FFC line (2) extending from the side of the mounting member.

4. The flat wire harness transmission structure according to claim 1, characterized in that, The first mounting component (3) and / or the second mounting component (4) include a mounting plate (32), on which a circular first mounting hole (321) and an oblong second mounting hole (322) are provided.

5. The flat wire harness transmission structure according to claim 1, characterized in that, One end of the chain (1) is rotatably connected to the first mounting component (3) via a first pin (13), and the other end is rotatably connected to the second mounting component (4) via a second pin (14).

6. The flat wire harness transmission structure according to claim 1, characterized in that, A shielding film (22) is attached to the surface of some of the FFC lines (2).

7. The flat wire harness transmission structure according to claim 1, characterized in that, The terminal connection area (21) of the FFC line (2) is an exposed copper conductor used to connect with pierced terminals or crimped terminals.

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