Wire harness expansion device for automobile seat

Abstract

The utility model discloses a wire harness telescopic device for an automobile seat, and belongs to the technical field of automobile parts. Comprising a drag chain guiding mechanism which is arranged on a carriage bottom plate along with the side, back to an automobile seat, of an automobile seat sliding rail. The end, facing the drag chain guiding mechanism, of the drag chain is connected with the drag chain guiding mechanism, the middle of the drag chain and the drag chain guiding mechanism form a sliding pair, the other end of the drag chain forms a movable part connecting end, and the movable part connecting end is connected with a movable sliding rail of the automobile seat sliding rail in the using state. The drag chain protection device is characterized by further comprising a drag chain protection cover, the rear end of the drag chain protection cover is connected with the drag chain guiding mechanism and shields the drag chain in the state that the drag chain protection cover corresponds to one end of the drag chain and the middle of the drag chain, and the front end of the drag chain protection cover is fixed to the carriage bottom plate in the using state. The device has the advantages that the number of parts is reduced, the structure is simplified, manufacturing and mounting are convenient, and economy is embodied; a good modularization effect is achieved; and the service life of the wire harness is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a wire harness telescopic device for automotive seats. Background Technology

[0002] For the industry, the application scenarios of the wire harness extension device mentioned above are not unfamiliar. It is used for dynamic wiring between the car body and the seat, and has positive significance for the wire speed control and extension guidance of the sliding car seat.

[0003] Modern car seats, especially in high-end or luxury vehicles, are increasingly equipped with a wide range of functions supported by the vehicle's power supply. Beyond basic features like fore-and-aft sliding, backrest adjustment, and seat rotation, numerous advanced features designed to enhance comfort, health, convenience, and overall functionality are now commonplace. Examples include: multi-mode massage systems such as kneading, wave-like massage, air pressure massage, acupressure massage, and even dedicated massage programs for the neck, shoulders, and lower back; seat ventilation, using fans or ventilators to actively draw or blow air, alleviating summer heat (often found in mid-to-high-end models); zoned temperature control, allowing independent adjustment of heating / ventilation temperatures for the seat and backrest (found in Lexus and Land Rover models); dynamic support adjustment, such as adjusting the strength of side bolsters or lumbar support; optimized pressure distribution, such as adjusting seat cushion firmness via airbags (e.g., Audi's relaxation seats); convenience and intelligence; safety and driver assistance; personalization and luxury features; and special-scenario functions (such as hidden interfaces or one-touch pop-out child seats), and so on. Not all of these functions require a wiring harness connected to the vehicle's power supply.

[0004] If the functions of car seats increase and the wiring also increases accordingly, resulting in numerous interconnected wires forming the aforementioned wiring harness, and these cannot be effectively controlled, electrical wiring problems such as pulling, forced bending, tangling, and wear will occur, affecting the functioning of the seats. Taking electric seat rails as an example, wiring harnesses such as power lines and sensor lines are routed from the vehicle floor (also known as the "car floor") to the bottom of the movable seat. Therefore, the aforementioned wiring harness extension device (also known as a "wiring harness guide device") is an indispensable device for solving the dynamic wiring connection of car seat circuits. Again, using car seat rails as an example, when the moving rail (also known in the industry as the "upper rail" or "inner rail") moves relative to the stationary rail (also known in the industry as the "lower rail" or "outer rail"), the wiring harness connected to the moving rail, which is a sliding component, also moves with the moving rail. The excess length of the wiring harness extending from the rail can be received by the wiring harness extension device, and vice versa.

[0005] Technical information related to the aforementioned wire harness extension device can be found in publicly available Chinese patent documents. For example, CN218616351U recommends a "mechanism for resetting a long sliding rail wire harness box and cable chain in an automobile seat". Since this patent requires setting a reset component and a cable chain sliding component separately in the cable chain box, the structure is relatively complex. CN214929502U provides a "seat leg support extension wire harness". This patent uses cable ties to fix the wire harness, which is laid in the middle of the cable chain and leads out of the cable chain at both ends, to the first and second connectors respectively. This patent does not have the function of storing the wire harness. CN110574250A introduces a "wire harness wiring device". Since this patent requires the use of a sliding retaining part, the structure is also relatively complex, which increases the difficulty of manufacturing, assembly and use. Utility Model Content

[0006] The objective of this invention is to provide a wiring harness extension device for automotive seats that helps to significantly reduce the number of parts, thereby simplifying the structure and facilitating manufacturing and installation; it also helps to achieve an ideal modular effect, thereby reducing the size and adapting to the usage requirements within the limited space of a vehicle; and it provides good protection for the wiring harness and avoids situations such as pulling, tangling, and wear during use, thus ensuring the service life of the wiring harness.

[0007] The present invention achieves its objective as follows: a wire harness extension device for automotive seats includes a cable chain guide mechanism, which, in use, is mounted on the vehicle floor along the side of the vehicle seat slide rail opposite to the length direction of the vehicle seat; a cable chain, one end of which is connected to the cable chain guide mechanism, the middle portion of which forms a sliding pair with the cable chain guide mechanism, and the other end of which forms a moving part connection end, which, in use, is connected to the moving slide rail of the vehicle seat slide rail; characterized in that: it further includes a cable chain guard, the rear end of which, corresponding to one end and the middle portion of the cable chain, is connected to the cable chain guide mechanism and protects the cable chain, while the front end of the cable chain guard is fixed to the vehicle floor in use.

[0008] In a specific embodiment of this utility model, the cable chain guiding mechanism includes a cable chain sliding seat, a cable chain sliding seat cover, and a cable chain guide block. In use, the cable chain sliding seat is fixedly mounted on the vehicle floor along the side of the vehicle seat slide rail facing away from the vehicle seat's length direction. A cable chain sliding groove is formed on the upward-facing side of the cable chain sliding seat. The cable chain sliding seat cover is fixed to the upward-facing surface of the cable chain sliding seat and simultaneously closes the upper opening of the cable chain sliding groove. The cable chain guide block is embedded in the left front end of the cable chain sliding seat. The middle part of the cable chain forms a sliding pair with the cable chain sliding groove and also forms a sliding pair with the right upward-facing side of the cable chain guide block. The rear end of the cable chain guard is fixedly connected to the right front end of the cable chain sliding seat.

[0009] In another specific embodiment of this utility model, a cable chain fixing foot is formed on the left end wall and the center position of the rear side wall of the cable chain sliding seat. A fixing hole is formed on the bottom wall of the fixing foot of the cable chain fixing foot, and the cable chain fixing foot is fixed to the car floor plate by screws at the position corresponding to the fixing hole.

[0010] In another specific embodiment of this utility model, a left sliding opening is formed on the front left side of the drag chain sliding groove, and a right sliding opening is formed on the front right side of the drag chain sliding groove. The drag chain sliding groove is connected to the outside through the left and right sliding openings, and the shape of the drag chain sliding groove is C-shaped. A foot groove is formed at the front of the left end wall of the drag chain sliding seat, and a foot is formed on the rear left side of the drag chain guide block at a position corresponding to the foot groove. The foot fits into the foot groove. A guide block guide chain groove is formed on the upward-facing side of the right end of the drag chain guide block at a position corresponding to the left sliding opening. The drag chain, the left and right sliding openings of the drag chain, and the guide block guide chain groove form a sliding pair. One end of the drag chain is hinged to the front right side of the drag chain sliding seat. The drag chain sliding seat cover plate is fixed to the upward-facing side of the drag chain sliding seat by screws.

[0011] In another specific embodiment of this utility model, a cable chain guard limiting seat is formed at the upper and lower parts of the right front of the cable chain slide seat and at corresponding positions, protruding from the surface of the cable chain slide seat. The middle part of the rear end of the cable chain guard, which protects one end and the middle part of the cable chain, cooperates with the cable chain guard limiting seat. A pair of cable chain hinge ears are formed on the right front side of the cable chain slide seat and at a position corresponding to one end of the cable chain. A cable chain hinge ear joint shaft head hinge hole is formed on the pair of cable chain hinge ears. One end of the cable chain extends into the pair of cable chain hinge ears and is hinged between the pair of cable chain hinge ears at a position corresponding to the position of the cable chain hinge ear joint shaft head hinge hole. A wire harness guide port is formed on the cable chain slide seat and at a position corresponding to the rear end of the cable chain.

[0012] In another specific embodiment of this utility model, a cable chain connecting seat is connected to the moving part connecting end of the cable chain, and a connecting clip is formed on the upper part of the cable chain connecting seat. In use, the connecting clip is connected to the car seat slide rail.

[0013] In a further specific embodiment of this utility model, a cable chain cover limiting seat mating notch is provided at the middle of the rear end of the cable chain cover. The cable chain cover limiting seat mating notch mates with the cable chain cover limiting seat. A cable chain cover rear end fixing screw hole is provided at the rear end of the cable chain cover, respectively located on the left and right sides of the cable chain cover limiting seat mating notch. A cable chain cover fixing screw hole is provided on the cable chain sliding seat, respectively located on the left and right sides of the cable chain cover limiting seat, corresponding to the cable chain cover rear end fixing screw hole. The rear end of the cable chain cover is fixedly connected to the cable chain sliding seat by the cable chain cover rear end fixing screw at the positions corresponding to the cable chain cover rear end fixing screw hole and the cable chain cover fixing screw hole. A cable chain cover mounting bracket is fixed at the front end of the cable chain cover. In use, the cable chain cover mounting bracket is fixed to the vehicle floor plate. One end and the middle part of the cable chain are located inside the cable chain cover cavity of the cable chain cover.

[0014] In a further specific embodiment of this utility model, a mounting clearance opening is formed on the left side of the front end of the cable chain guard, and a insert plate compensation opening is formed on the right side of the front end. A mounting clearance cavity is formed at the left end of the cable chain guard mounting base, corresponding to the mounting clearance opening. A carriage floor fixing screw hole is formed on the bottom wall of the mounting clearance cavity. In use, the bottom wall of the mounting clearance cavity is connected to the carriage floor fixing screw at the position corresponding to the carriage floor fixing screw hole. The bottom plate is fixed, and an insert plate is formed on the upper right end of the cable chain cover mounting base. The insert plate is inserted into the compensation port of the insert plate. A cable chain cover fixing screw hole is opened at the front end of the cable chain cover, and a cable chain cover fixing screw hole is opened on the cable chain cover mounting base at the position corresponding to the cable chain cover fixing screw hole. The cable chain cover mounting base is fixed to the front end of the cable chain cover by the cable chain cover fixing screw provided on the cable chain cover fixing screw hole at the position corresponding to the cable chain cover fixing screw hole.

[0015] In yet another specific embodiment of this utility model, the cable chain is composed of a plurality of chain link units cyclically connected in the length direction. Each chain link unit includes a skeleton, joint guide sliders, joint head hinge seats, and joint heads. The skeleton has a skeleton wire harness passage cavity with both ends communicating with the outside. The joint guide sliders are symmetrically configured on the upper and lower walls of the skeleton, and the end faces of the joint guide sliders form sliding surfaces. Similarly, the joint head hinge seats are symmetrically configured on the upper and lower walls of the skeleton. The joint head hinge seat has a joint head hinge cavity. The joint heads are symmetrically formed on the upper and lower walls of the skeleton and located on one side of the joint guide slider. The joint head is hinged to the joint head hinge cavity of the joint head hinge seat of the adjacent link unit. The joint head of the first link unit at one end of the cable chain is hinged to the joint head hinge hole of the cable chain hinge ear, while the joint head hinge cavity of the joint head hinge seat of the last link unit at the other end of the cable chain is hinged to the cable chain connecting seat.

[0016] In another specific embodiment of this utility model, a pair of cable chain hinge ears are formed on the cable chain connector seat and on the side facing the joint shaft head hinge seat of the last link unit. A cable chain hinge ear shaft head is formed on each side of the pair of cable chain hinge ear and on the opposite side. The cable chain hinge ear shaft head extends into the joint shaft head hinge cavity of the joint shaft head hinge seat of the last link unit. The cable chain connector seat is provided with a cable chain hinge seat wire harness lead-out cavity. The cable chain hinge seat wire harness lead-out cavity communicates with the skeleton wire harness through the cavity and is also open to the outside. The wire harness led out from the cable chain hinge seat wire harness lead-out cavity is electrically connected to the electrical controller installed on the car seat.

[0017] One of the technical effects of the present invention is that, since it consists only of a cable chain mechanism, a cable chain, and a cable chain cover, and since it eliminates components and cable chain sliding components compared to existing technologies, the number of parts is significantly reduced, which not only simplifies the structure but also facilitates manufacturing and installation and reflects economy. Secondly, since the cable chain cover protects one end and the middle of the cable chain and fixes the cable chain cover to the cable chain guiding mechanism, it has a good modular effect, which reduces the size and adapts to the use requirements in the limited space of the vehicle. Since the cable chain can play a good protective role for the wiring harness, it can avoid situations such as pulling, tangling, and wear during the use of the wiring harness, thus ensuring the service life of the wiring harness. Attached Figure Description

[0018] Figure 1 This is an assembly structure diagram of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the assembled assembly;

[0020] Figure 3 To constitute Figure 1 and Figure 2 The diagram shows a detailed structural diagram of the chain link unit of the cable carrier. Detailed Implementation

[0021] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0022] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on Figure 1The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0023] Please see Figure 1 The diagram shows a cable chain guide mechanism 1, which, in use, is mounted on the vehicle floor along the side of the car seat rail opposite to the length direction of the car seat. More specifically, the cable chain guide mechanism 1 is mounted on the vehicle floor at its front end on the side of the car seat rail parallel to the length direction of the car seat rail opposite to the car seat. The diagram also shows a cable chain 2 (also called a "tank chain"). One end of the cable chain 2 facing the aforementioned cable chain guide mechanism 1 (i.e., the first end of the cable chain 2) is connected to the cable chain guide mechanism 1, and the middle part forms a sliding pair with the cable chain guide mechanism 1. The other end of the cable chain 2 (i.e., the second end of the cable chain 2, i.e., the moving part connection end of the cable chain 2) is configured as the moving part connection end. In use, this moving part connection end is connected to the moving rail of the car seat rail, which is the moving part.

[0024] The key technical point of the technical solution provided by this utility model is that the structure of the aforementioned wire harness telescopic device for automobile seats also includes a drag chain cover 3. The rear end of the drag chain cover 3 is connected to the aforementioned drag chain guide mechanism 1 in a state corresponding to one end and the middle of the aforementioned drag chain 2, and protects the one end and the middle of the drag chain 2. The front end of the drag chain cover 3 is fixed to the aforementioned vehicle floor in the use state.

[0025] The aforementioned cable chain guiding mechanism 1 includes a cable chain slide seat 11, a cable chain slide seat cover 12, and a cable chain guide block 13. In use, the cable chain slide seat 11 is fixedly mounted on the vehicle floor along the side of the vehicle seat slide rail facing away from the vehicle seat's length direction. More specifically, the cable chain slide seat 11 is fixed to the vehicle floor in a state parallel to the front end (side facing away from the vehicle seat) of the vehicle seat slide rail's length direction, and on the upward-facing side of the cable chain slide seat 11... The cable chain has a sliding groove 111. The cable chain sliding seat cover 12 is fixed to the upward-facing surface of the cable chain sliding seat 11 and simultaneously closes the upper opening of the cable chain sliding groove 111. The cable chain guide block 13 is embedded in the left front side of the cable chain sliding seat 11. The middle part of the cable chain 2 forms a sliding pair with the cable chain sliding groove 111 and also forms a sliding pair with the right upward-facing side of the cable chain guide block 13. The rear end of the cable chain cover 3 is fixedly connected to the right front side of the cable chain sliding seat 11.

[0026] Please stay tuned. Figure 1A cable chain fixing foot 112 is formed on the left end wall and the center of the rear side wall of the aforementioned cable chain sliding seat 11. A fixing foot fixing hole 1121 is formed on the bottom wall of the fixing foot of the cable chain fixing seat 112. The cable chain fixing foot 112 is fixed to the aforementioned carriage floor plate by screws at the position corresponding to the fixing foot fixing hole 1121.

[0027] The aforementioned cable chain sliding groove 111 has a left sliding opening 1112 formed on the front left side, and a right sliding opening 1113 formed on the front right side. These left and right sliding openings 1112 and 1113 allow the cable chain sliding groove 111 to communicate with the outside. The cable chain sliding groove 111 is C-shaped (or semi-circular). A retaining groove 117 is formed in front of the left end wall of the aforementioned cable chain sliding seat 11, and a retaining groove 117 is formed on the rear left side of the aforementioned cable chain guide block 13, corresponding to the retaining groove 117. The locking foot 131 is fitted into the locking foot groove 117. A guide block guide groove 132 is formed on the upward-facing side of the right end of the drag chain guide block 13, corresponding to the position of the left sliding opening 1112 of the drag chain. The drag chain 2, the left and right sliding openings 1112 and 1113 of the drag chain, and the guide block guide groove 132 form a sliding pair. One end of the drag chain 2 is hinged to the front right end of the drag chain sliding seat 11. The drag chain sliding seat cover plate 12 is fixed to the upward-facing side of the drag chain sliding seat 11 by screws, and fully protects the drag chain sliding groove 111.

[0028] A cable chain cover limiting seat 113 is formed at the upper and lower front of the right end of the aforementioned cable chain slide seat 11 and at corresponding positions on each side. The cable chain cover limiting seat 113 is used to protect one end of the aforementioned cable chain 2 and the middle part of the cable chain 2. The middle part of the rear end of the aforementioned cable chain cover 3 cooperates with the cable chain cover limiting seat 113.

[0029] Depend on Figure 1 As shown, a pair of cable chain hinge ears 114 are formed on the right front side of the aforementioned cable chain slide seat 11 and at the position corresponding to one end of the aforementioned cable chain 2. A cable chain hinge ear joint head hinge hole 1141 is provided on the pair of cable chain hinge ears 114. One end of the aforementioned cable chain 2 extends into the pair of cable chain hinge ears 114 and is hinged between the pair of cable chain hinge ears 114 at the position corresponding to the position of the cable chain hinge ear joint head hinge hole 1141. A wire harness guide port 115 is formed on the cable chain slide seat 11 and at the position corresponding to the rear end of the aforementioned cable chain 2.

[0030] See you later Figure 1 And combined Figure 2A cable chain connector 4 is connected to the aforementioned moving part connection end of the aforementioned cable chain 2. A connecting pin 41 is formed on the upper part of the cable chain connector 4. In use, the connecting pin 41 is connected to the car seat slide rail, which is the aforementioned moving part.

[0031] Please see Figure 2 And combined Figure 1 A cable chain cover limiting seat mating notch 31 is provided at the middle of the rear end of the aforementioned cable chain cover 3. This notch 31 mates with the aforementioned cable chain cover limiting seat 113, meaning the cable chain cover limiting seat 113 is located within the notch 31. A cable chain cover rear end fixing screw hole 32 is provided at the rear end of the cable chain cover 3, located on the left and right sides of the notch 31. A cable chain cover sliding seat 11 is also provided with a fixing screw hole 32 at the left and right sides of the cable chain cover limiting seat 113. Each of the above-mentioned cable chain cover has a cable chain cover fixing screw hole 116 corresponding to the cable chain cover rear end fixing screw hole 32. The cable chain cover rear end fixing screw is used to fix the rear end of the cable chain cover 3 to the cable chain sliding seat 11 at the positions corresponding to the cable chain cover rear end fixing screw hole 32 and the cable chain cover fixing screw hole 116. A cable chain cover mounting bracket 33 is fixed at the front end of the cable chain cover 3. In use, the cable chain cover mounting bracket 33 is fixed to the vehicle floor. One end and the middle part of the cable chain 2 are located in the cable chain cover cavity 34 of the cable chain cover 3.

[0032] See you later Figure 1 and Figure 2 A mounting clearance opening 35 is formed on the left side of the front end of the aforementioned cable chain guard 3, and a insert plate compensation opening 36 is formed on the right side of the front end. A mounting clearance cavity 331 is formed at the left end of the aforementioned cable chain guard mounting base 33, corresponding to the aforementioned mounting clearance opening 35. A vehicle floor fixing screw hole 3311 is formed on the bottom wall 3311 of the mounting clearance cavity 331. In use, the bottom wall 3311 of the mounting clearance cavity is fixed to the vehicle floor of the aforementioned vehicle by the mounting clearance cavity bottom fixing screw at the position corresponding to the vehicle floor fixing screw hole 33111. An insert plate 332 is formed on the upper right end of the cable chain cover mounting base 33. The insert plate 332 is inserted into and cooperates with the aforementioned insert plate compensation port 36. A cable chain cover fixing screw hole 37 is provided at the front end of the cable chain cover 3. A cable chain cover fixing screw hole 333 is provided on the aforementioned cable chain cover mounting base 33 at the position corresponding to the cable chain cover fixing screw hole 37. The cable chain cover mounting base 33 is fixed to the front end of the aforementioned cable chain cover 3 by the cable chain cover fixing screw provided on the cable chain cover fixing screw hole 37 at the position corresponding to the cable chain cover fixing screw hole 333.

[0033] Please see Figure 3 And combined Figure 1 and Figure 2 The aforementioned cable chain 2 is composed of a plurality of link units 21 connected in a circular manner along its length. Each link unit 21 includes a frame 211, joint guide sliders 212, joint shaft head hinge seats 213, and joint shaft heads 214. The frame 211 has a frame wire harness passage cavity 2111 with both ends communicating with the outside. The joint guide sliders 212 are respectively configured in a symmetrical state (also referred to as an upper and lower corresponding state, the same below) on the upper wall 2112 and lower wall 2113 of the frame 211, and the end face of the joint guide slider 212 is configured as a guide slider sliding surface 2121. The joint shaft head hinge seats 213 are also configured in a symmetrical state on the aforementioned upper wall 2112 and lower wall 2113 of the frame, and the joint... The joint head hinge seat 213 forms a joint head hinge cavity 2131. Joint heads 214 are symmetrically formed on the upper wall 2112 and lower wall 2113 of the skeleton 211 and located on one side of the aforementioned joint guide slider 212. Each joint head 214 is hinged to the joint head hinge cavity 2131 of the aforementioned joint head hinge seat 213 of an adjacent link unit 21. Specifically, the joint head 214 of the first link unit 21 at one end of the cable chain 2 is hinged to the aforementioned cable chain hinge ear joint head hinge hole 1141, while the joint head hinge cavity 2131 of the joint head hinge seat 213 of the last link unit 21 at the other end of the cable chain 2 is hinged to the aforementioned cable chain connecting seat 4. As explained above, the sliding of the cable chain 2 is achieved through the guiding action of the aforementioned guide slider sliding surface 2121.

[0034] On the aforementioned cable chain connector 4, and on one side facing the joint shaft head hinge seat 213 of the aforementioned last link unit 21, there is a pair of cable chain hinge seat hinge ears 43 that are vertically aligned with each other. On each of the pair of cable chain hinge seat hinge ears 43, and on the opposite side, there is a cable chain hinge seat hinge ear shaft head 431. The cable chain hinge seat hinge ear shaft head 431 extends into the joint shaft head hinge cavity 2131 of the aforementioned last link unit 21. The aforementioned cable chain connector 4 is provided with a cable chain hinge seat wire harness lead-out cavity 42. The cable chain hinge seat wire harness lead-out cavity 42 communicates with the aforementioned skeleton wire harness through cavity 2111 and is also open to the outside. The wire harness led out from the cable chain hinge seat wire harness lead-out cavity 42 is electrically connected to the electrical controller installed on the car seat.

[0035] This utility model is used in conjunction with the installation of car seat slide rails on the vehicle's floor. The wiring harness (not shown in the figure) passes sequentially through the aforementioned wiring harness guide port 115, the skeleton wiring harness of the skeleton 211 constituting all the chain link units 21 of the cable chain 2, the cable chain hinge seat wiring harness lead-out cavity 42 of the cable chain connector 4, and is electrically connected to the structural system of the seat and is usually installed on the car seat. Since the form of connection between the wiring harness and the electrical controller is prior art, for example, see but not limited to CN222650483U, CN110574250A, etc., the applicant will not elaborate further.

[0036] When the car seat is adjusted backward (taking the occupant's seating direction as an example), the car seat slide rail, as a moving part, slides backward along the slide rail. This causes the cable chain connecting seat 4 to slide accordingly via the connecting clip 41. The cable chain 2, previously stored in the cable chain cover cavity 34, moves outward through the cable chain sliding groove 111 towards the side of the vehicle. Figure 1 The forward extension is shown in the indicated position. Conversely, when the car seat is to be adjusted forward, the redundant portion of the cable chain 2 is housed in the cable chain cover cavity 34 in an S-shape or serpentine manner via the cable chain sliding groove 111. Since the aforementioned principle of the moving slide rail driving the car seat to move forward and backward is existing technology, for example, see, but not limited to, Chinese patent publication numbers CN119428374A, CN113320450A, CN113335151A, etc., the applicant will not elaborate further.

[0037] During the above process, the wire harness is effectively protected by the cable chain 2, so there will be no pulling, tangling, or friction.

[0038] Although the applicant has cited examples of applications in movable slide rails in this utility model, it is not specifically limited to them. For example, leg supports and so on can also be applied.

[0039] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A wire harness extension device for a car seat, comprising a cable chain guide mechanism (1), which, in use, is mounted on the floor of the vehicle compartment along the side of the car seat slide rail opposite to the length direction of the car seat; a cable chain (2), one end of which is connected to the cable chain guide mechanism (1), the middle portion of which forms a sliding pair with the cable chain guide mechanism (1), and the other end of which forms a moving part connection end, which, in use, is connected to the moving slide rail of the car seat slide rail; characterized in that: It also includes a cable chain guard (3), the rear end of which is connected to the cable chain guide mechanism (1) in a state corresponding to one end of the cable chain (2) and the middle of the cable chain (2) and protects the cable chain (2), while the front end of the cable chain guard (3) is fixed to the car floor in the use state.

2. The wiring harness extension device for automobile seats according to claim 1, characterized in that: The cable chain guiding mechanism (1) includes a cable chain sliding seat (11), a cable chain sliding seat cover (12), and a cable chain guide block (13). The cable chain sliding seat (11) is fixedly mounted on the floor of the vehicle body along the side of the vehicle seat slide rail facing away from the vehicle seat in the use state. A cable chain sliding groove (111) is formed on the upward side of the cable chain sliding seat (11). The cable chain sliding seat cover (12) is fixed to the upward surface of the cable chain sliding seat (11) and simultaneously closes the upper opening of the cable chain sliding groove (111). The cable chain guide block (13) is embedded in the left front side of the cable chain sliding seat (11). The middle part of the cable chain (2) forms a sliding pair with the cable chain sliding groove (111) and also forms a sliding pair with the right upward side of the cable chain guide block (13). The rear end of the cable chain guard (3) is fixedly connected to the right front side of the cable chain sliding seat (11).

3. The wiring harness extension device for automobile seats according to claim 2, characterized in that: A cable chain fixing foot (112) is formed on the left end wall and the center of the rear side wall of the cable chain sliding seat (11). A fixing hole (1121) is formed on the bottom wall of the fixing foot of the cable chain fixing foot (112). The cable chain fixing foot (112) is fixed to the car floor plate by screws at the position corresponding to the fixing hole (1121).

4. The wiring harness extension device for automobile seats according to claim 2, characterized in that: A left sliding opening (1112) is formed on the front left side of the cable chain sliding groove (111), and a right sliding opening (1113) is formed on the front right side of the cable chain sliding groove (111). The cable chain sliding groove (111) is connected to the outside through the left and right sliding openings (1112, 1113), and the cable chain sliding groove (111) is C-shaped. A foot groove (117) is formed on the front left end wall of the cable chain sliding seat (11), and a foot groove (117) is formed on the rear left side of the cable chain guide block (13) at a position corresponding to the foot groove (117). A locking foot (131) is fitted into the locking foot groove (117). A guide block guide chain groove (132) is formed on the right end of the drag chain guide block (13) facing upward and at a position corresponding to the left sliding port (1112) of the drag chain. The drag chain (2), the left and right sliding ports (1112, 1113) of the drag chain, and the guide block guide chain groove (132) form a sliding pair. One end of the drag chain (2) is hinged to the front right end of the drag chain sliding seat (11). The drag chain sliding seat cover plate (12) is fixed to the upward side of the drag chain sliding seat (11) by screws.

5. The wiring harness extension device for automobile seats according to claim 2, characterized in that: A drag chain guard limiting seat (113) is formed at the upper and lower parts of the right front of the drag chain slide seat (11) and at corresponding positions on each side. The middle part of the rear end of the drag chain guard (3) which is used to protect one end of the drag chain (2) and the middle part of the drag chain (2) cooperates with the drag chain guard limiting seat (113). A pair of drag chain guards are formed on the right front side of the drag chain slide seat (11) and at the position corresponding to one end of the drag chain (2). The corresponding drag chain hinge lug (114) has a drag chain hinge lug joint head hinge hole (1141) on a pair of drag chain hinge lugs (114). One end of the drag chain (2) extends between the pair of drag chain hinge lugs (114) and is hinged between the pair of drag chain hinge lugs (114) at the position corresponding to the drag chain hinge lug joint head hinge hole (1141). A wire harness guide port (115) is formed on the drag chain slide seat (11) at the position corresponding to the rear of one end of the drag chain (2).

6. The wiring harness extension device for automobile seats according to claim 5, characterized in that: A cable chain connector (4) is connected to the moving part connection end of the cable chain (2). A connecting clip (41) is formed on the upper part of the cable chain connector (4). In use, the connecting clip (41) is connected to the car seat slide rail.

7. The wiring harness extension device for automotive seats according to claim 5, characterized in that: A cable chain cover limiting seat mating notch (31) is provided at the middle of the rear end of the cable chain cover (3). The cable chain cover limiting seat mating notch (31) mates with the cable chain cover limiting seat (113). A cable chain cover rear end fixing screw hole (32) is provided at the rear end of the cable chain cover (3), located on the left and right sides of the cable chain cover limiting seat mating notch (31). A cable chain cover sliding seat (11) is provided on the left and right sides of the cable chain cover limiting seat (113), with the hole corresponding to the cable chain cover rear end fixing screw hole. The drag chain cover fixing screw hole (116) corresponding to the nail hole (32) is fixedly connected to the drag chain sliding seat (11) by the drag chain cover rear end fixing screw at the position corresponding to the drag chain cover rear end fixing screw hole (32) and the drag chain cover fixing screw hole (116). A drag chain cover mounting bracket (33) is fixed at the front end of the drag chain cover (3). In the use state, the drag chain cover mounting bracket (33) is fixed to the car floor plate. One end and the middle of the drag chain (2) are located in the drag chain cover cavity (34) of the drag chain cover (3).

8. The wiring harness extension device for automobile seats according to claim 7, characterized in that: A mounting clearance opening (35) is formed on the left side of the front end of the cable chain cover (3), and a insert plate compensation opening (36) is formed on the right side of the front end. A mounting clearance cavity (331) is formed at the left end of the cable chain cover mounting base (33) and at a position corresponding to the mounting clearance opening (35). A carriage floor fixing screw hole (33111) is provided on the bottom wall (3311) of the mounting clearance cavity (331). In the use state, the bottom wall (3311) of the mounting clearance cavity is fixed to the carriage floor by the mounting clearance cavity bottom fixing screw at the position corresponding to the carriage floor fixing screw hole (33111). The upper right end of the cover mounting base (33) is provided with an insert plate (332), which is inserted into the insert plate compensation port (36). A cable chain cover fixing screw hole (37) is provided at the front end of the cable chain cover (3), and a cable chain cover fixing screw hole (333) is provided on the cable chain cover mounting base (33) at the position corresponding to the cable chain cover fixing screw hole (37). The cable chain cover mounting base (33) is fixed to the front end of the cable chain cover (3) by the cable chain cover fixing screw provided on the cable chain cover fixing screw hole (37) at the position corresponding to the cable chain cover fixing screw hole (333).

9. The wiring harness extension device for automobile seats according to claim 6, characterized in that: The drag chain (2) is composed of a plurality of link units (21) connected cyclically along its length. Each link unit (21) includes a frame (211), a joint guide slider (212), a joint head hinge seat (213), and a joint head (214). The frame (211) has a frame wire harness through cavity (2111) with both ends communicating with the outside. The joint guide sliders (212) are symmetrically arranged on the upper wall (2112) and lower wall (2113) of the frame (211), and the end face of the joint guide slider (212) is configured as a guide slider sliding surface (2121). The joint head hinge seat (213) is also symmetrically arranged on the upper wall (2112) and lower wall (2113) of the frame. The system comprises a joint head hinge cavity (2131), and joint heads (214) are respectively symmetrically formed on the upper wall (2112) and lower wall (2113) of the skeleton (211) and located on one side of the joint guide slider (212). The joint head (214) is hinged to the joint head hinge cavity (2131) of the joint head hinge seat (213) of the adjacent link unit (21). The joint head (214) of the first link unit (21) at one end of the drag chain (2) is hinged to the joint head hinge hole (1141) of the drag chain hinge ear, while the joint head hinge cavity (2131) of the joint head hinge seat (213) of the last link unit (21) at the other end of the drag chain (2) is hinged to the drag chain connecting seat (4).

10. The wiring harness extension device for automobile seats according to claim 9, characterized in that: On the cable chain connector (4) and on one side of the joint shaft head hinge seat (213) of the last link unit (21), there is a pair of cable chain hinge seat hinge ears (43) that are vertically aligned with each other. On each side of the pair of cable chain hinge seat hinge ears (43) that are opposite to each other, there is a cable chain hinge seat hinge ear shaft head (431). The cable chain hinge ear shaft head (431) extends into the joint shaft head hinge cavity (2131) of the joint shaft head hinge seat (2131) of the last link unit (21). The cable chain connector (4) is provided with a cable chain hinge seat wire harness lead-out cavity (42). The cable chain hinge seat wire harness lead-out cavity (42) communicates with the skeleton wire harness through cavity (2111) and is also open to the outside. The wire harness led out from the cable chain hinge seat wire harness lead-out cavity (42) is electrically connected to the electrical controller installed on the car seat.

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