Wire harness expansion device for automobile seat

Abstract

The invention 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] The present invention belongs to the technical field of automotive parts, and particularly relates to a wire harness telescopic device for an automotive seat. Background Art

[0002] For the industry, the application scenario of the above-mentioned wire harness telescopic device is not unfamiliar. It is used for dynamic wiring between the automotive body and the seat, and has positive significance for the wire speed control and telescopic guidance of a slidable automotive seat.

[0003] Modern automotive seats, especially high-end models or luxury vehicles, have increasingly rich functions supported by in-vehicle power supplies. In addition to basic functions such as forward and backward sliding, backrest adjustment, and swiveling seat, many functions aimed at improving comfort, health, convenience, and advanced functions are not uncommon on seats. For example: multi-mode massage systems such as kneading, wave massage, air pressure massage, acupoint massage, and even providing exclusive massage programs for the neck, shoulders, and waist; seat ventilation, which realizes active air suction or blowing through a fan or ventilator to relieve summer heat (commonly configured in mid- to high-end models); zone temperature control, such as the seat and backrest can independently adjust the heating / ventilation temperature (seen in Lexus and Land Rover models); dynamic support adjustment such as adjusting the support strength of the side wings or lumbar support; pressure distribution optimization such as adjusting the seat cushion hardness through airbags (such as the relaxation seat of Audi); convenience and intelligence, safety and driving assistance, personalization and luxury configuration, special scenario functions (such as hidden interfaces or one-key pop-up child seats), and so on. Not all of the aforementioned functions require the support of a wire harness connected to the in-vehicle power supply.

[0004] If there are more and more functions for automotive seats and the number of wires also increases accordingly, and the many wires that make up the aforementioned wire harness cannot be effectively controlled, then electrical wire problems such as pulling, hard bending, winding, and wear will occur, affecting the performance of the seat functions. Taking an electric seat slide rail as an example, wires such as power wires and sensor wires are routed from the vehicle body floor (also called the "carriage floor") to the bottom of the movable seat. Thus, it can be seen that the aforementioned wire harness telescopic device (also called the "wire harness guiding device") is an indispensable device for solving the dynamic wiring connection of automotive seat wires. Still taking the electric seat slide rail as an example, when the moving slide rail (also called the "upper slide rail" or "inner slide rail" in the industry) moves relative to the static slide rail (also called the "lower slide rail" or "outer slide rail" in the industry), the wire harness connected to the moving slide rail as a sliding component also moves with the moving slide rail, and the excess length of the wire harness pushed out from the slide rail can be accommodated by the wire harness telescopic device, and vice versa.

[0005] In the publicly available Chinese patent documents, technical information related to the aforementioned wire harness stretching device can be found. For example, CN218616351U recommends "a reset assist mechanism for a wire harness box drag chain of a long slide rail of an automotive seat". Since this patent requires the separate setting of a reset component and a drag chain sliding component in the drag chain box, the structure is relatively complex; CN214929502U provides "a seat leg rest extension wire harness". This patent uses cable ties to fix the wire harness with the middle part laid in the drag chain and the two ends led out of the drag chain 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 holding part, the structure is also relatively complex, adding corresponding difficulties to manufacturing, assembly, and use. Summary of the Invention

[0006] The object of the present invention is to provide a wire harness telescopic device for an automotive seat, which helps to significantly reduce the number of components, simplifies the structure, is convenient for manufacturing, installation, and use, is conducive to achieving an ideal modular effect, reduces the volume, and meets the usage requirements in the limited space of the vehicle, is beneficial to the good protection of the wire harness, and avoids situations such as pulling, winding, and abrasion of the wire harness during use, thereby ensuring the service life of the wire harness.

[0007] The object of the present invention is achieved as follows: A wire harness telescopic device for an automotive seat includes a drag chain guiding mechanism, which is arranged on the vehicle floor on one side of the automotive seat slide rail of the vehicle, facing away from the length direction of the automotive seat, in the use state; a drag chain, one end of the drag chain facing the drag chain guiding mechanism is connected to the drag chain guiding mechanism, the middle part forms a sliding pair with the drag chain guiding mechanism, and the other end of the drag chain is configured as a moving part connection end, which is connected to the moving slide rail of the automotive seat slide rail in the use state; characterized in that: it further includes a drag chain shield, the rear end of the drag chain shield is connected to the drag chain guiding mechanism in a state corresponding to one end and the middle part of the drag chain and shields the drag chain, and the front end of the drag chain shield is fixed to the vehicle floor in the use state.

[0008] In a specific embodiment of the present invention, the drag chain guiding mechanism includes a drag chain sliding seat, a drag chain sliding seat cover plate, and a drag chain guiding block. The drag chain sliding seat is fixedly arranged on the carriage floor on one side of the length direction of the vehicle seat slide rail of the vehicle facing away from the vehicle seat in the use state, and a drag chain sliding groove is formed on the upward side of the drag chain sliding seat. The drag chain sliding seat cover plate is fixed to the upward-facing surface of the drag chain sliding seat and simultaneously closes the upper opening of the drag chain sliding groove. The drag chain guiding block is fixedly embedded in the front side of the left end of the drag chain sliding seat; the middle part of the drag chain forms a sliding pair with the drag chain sliding groove and also forms a sliding pair with the upward-facing side of the right end of the drag chain block; the rear end of the drag chain guard is fixedly connected to the front side of the right end of the drag chain sliding seat.

[0009] In another specific embodiment of the present invention, a drag chain fixing seat fixing foot is formed at the middle position of the left end wall and the rear side wall of the drag chain sliding seat. A fixing foot fixing hole is opened on the bottom wall of the fixing foot of the drag chain fixing seat, and the drag chain seat fixing foot is fixed to the carriage floor by a screw at a position corresponding to the fixing foot fixing hole.

[0010] In yet another specific embodiment of the present invention, a drag chain left sliding opening is formed at the front side of the left end of the drag chain sliding groove, and a drag chain right sliding opening is formed at the front side of the right end of the drag chain sliding groove. The drag chain sliding groove communicates with the outside through the left and right drag chain sliding openings, and the shape of the drag chain sliding groove is C-shaped; a clamping foot groove is opened at the position in front of the left end wall of the drag chain sliding seat, and a clamping foot is formed at the rear side of the left end of the drag chain guiding block and at a position corresponding to the clamping foot groove. The clamping foot is fitted with the clamping foot groove. A guide block drag chain groove is formed at the upward-facing side of the right end of the drag chain guiding block and at a position corresponding to the left drag chain sliding opening. The drag chain forms a sliding pair with the left and right drag chain sliding openings and the guide block drag chain groove; one end of the drag chain is hinged to the front side of the right end 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 a screw.

[0011] In yet another specific embodiment of the present invention, on the upper part and the lower part in front of the right end of the drag chain sliding seat, and at corresponding positions with each other, there is respectively formed a drag chain shield limit seat protruding from the surface of the drag chain sliding seat, which is used to cooperate with the middle part of the rear end of the drag chain shield for shielding one end of the drag chain and the middle part of the drag chain; on the front side of the right end of the drag chain sliding seat and at a position corresponding to one end of the drag chain, there are formed a pair of drag chain hinge ears corresponding to each other up and down. Drag chain hinge ear joint shaft head hinge holes are provided on the pair of drag chain hinge ears. One end of the drag chain extends between the pair of drag chain hinge ears and is hinged between the pair of drag chain hinge ears at a position corresponding to the drag chain hinge ear joint shaft head hinge holes; on the drag chain sliding seat and at a position corresponding to the rear of one end of the drag chain, there is formed a wire harness guiding port.

[0012] In still another specific embodiment of the present invention, a drag chain connection seat is connected to the moving part connection end of the drag chain. A connection clamping foot is formed on the upper part of the drag chain connection seat. In the use state, the connection clamping foot is connected to the vehicle seat slide rail.

[0013] In yet another specific embodiment of the present invention, a drag chain shield limit seat mating notch is provided in the middle part of the rear end of the drag chain shield. The drag chain shield limit seat mating notch cooperates with the drag chain shield limit seat. On the rear end of the drag chain shield and at positions respectively on the left side and the right side of the drag chain shield limit seat mating notch, there are respectively provided a drag chain shield rear end fixing screw hole. On the drag chain sliding seat and at positions respectively on the left side and the right side of the drag chain shield limit seat, there are respectively provided a drag chain shield fixing screw hole corresponding to the position of the drag chain shield rear end fixing screw hole. The rear end of the drag chain shield is fixedly connected to the drag chain sliding seat by drag chain shield rear end fixing screws at positions corresponding to the drag chain shield rear end fixing screw holes and the drag chain shield fixing screw holes. A drag chain shield mounting and fixing seat is fixed at the front end of the drag chain shield. In the use state, the drag chain shield mounting and fixing seat is fixed to the carriage floor; one end and the middle part of the drag chain are located in the drag chain shield cavity of the drag chain shield.

[0014] In yet another specific embodiment of the present invention, an installation relief opening is formed on the left side of the front end of the drag chain shield, and an insertion panel compensation opening is formed on the right side of the front end. An installation relief cavity is formed at the left end of the drag chain shield fixing seat and at a position corresponding to the installation relief opening. A carriage floor fixing screw hole is provided on the bottom wall of the installation relief cavity of the installation relief cavity. In the use state, the bottom wall of the installation relief cavity is fixed to the carriage floor by an installation relief cavity bottom fixing screw at a position corresponding to the carriage floor fixing screw hole. An insertion panel is formed on the upper part of the right end of the drag chain shield fixing seat, and the insertion panel is in insertion fit with the insertion panel compensation opening; a drag chain shield fixing screw hole is provided at the front end of the drag chain shield, and a drag chain shield fixing seat screw hole is provided on the drag chain shield fixing seat and at a position corresponding to the drag chain shield fixing screw hole. The drag chain shield fixing seat is fixed to the front end of the drag chain shield by a drag chain shield fixing seat screw disposed on the drag chain shield fixing screw hole at a position corresponding to the drag chain shield fixing seat screw.

[0015] In yet another even more specific embodiment of the present invention, the drag chain is composed of a plurality of link units connected in a cycle in the length direction. The link unit includes a skeleton, a joint guide slider, a joint shaft head hinge seat, and a joint shaft head. The skeleton is provided with a skeleton wire harness through cavity communicating with the outside at both ends. The joint guide sliders are respectively formed symmetrically on the upper wall body and the lower wall body of the skeleton of the skeleton, and the end face of the joint guide slider is formed as a guide slider sliding surface. The joint shaft head hinge seats are also formed symmetrically on the upper wall body and the lower wall body of the skeleton, and the joint shaft head hinge seats are provided with a joint shaft head hinge cavity. The joint shaft heads are respectively formed symmetrically on the upper wall body and the lower wall body of the skeleton of the carriage and are located on one side of the joint guide slider. The joint shaft head is hinged to the joint shaft head hinge cavity of the joint shaft head hinge seat of an adjacent link unit; wherein, the joint shaft head of the first link unit at one end of the drag chain is hinged to the joint shaft head hinge hole of the drag chain hinge ear, and the joint shaft head hinge cavity of the joint shaft head hinge seat of the last link unit at the other end of the drag chain is hinged to the drag chain hinge seat.

[0016] In yet another specific embodiment of the present invention, on the drag chain hinge seat and on one side facing the joint shaft head hinge seat of the last link unit, a pair of drag chain hinge seat hinge ears corresponding to each other in the up-and-down position are formed. On each of the two sides of this pair of drag chain hinge seat hinge ears facing away from each other, a drag chain hinge seat hinge ear shaft head is formed. The drag chain hinge seat 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 drag chain hinge seat is provided with a drag chain hinge seat wire harness lead-out cavity, which is communicated with the skeleton wire harness through cavity and also communicated with the outside. The wire harness led out from the drag chain hinge seat wire harness lead-out cavity is electrically connected to an electrical controller provided on the vehicle seat.

[0017] One of the technical effects of the technical solution provided by the present invention is that since it is only composed of a drag chain mechanism, a drag chain and a drag chain shield, and since the component and the drag chain sliding component are abandoned compared with the prior art, the number of parts is significantly reduced, which not only simplifies the structure, but also facilitates manufacturing and installation and reflects economy. Second, since one end and the middle part of the drag chain are shielded by the drag chain shield and the drag chain shield is fixed to the drag chain guiding mechanism, it has a good modular effect, can reduce the volume and meet the use requirements in the limited space of the vehicle. Since the drag chain can play a good role in protecting the wire harness, it can avoid situations such as pulling, winding and wear of the wire harness during use, thus ensuring the service life of the wire harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the assembly structure diagram of the present invention; Figure 2 is Figure 1 the schematic diagram after assembly; Figure 3 is composed of Figure 1 and Figure 2 the detailed structure diagram of the link unit of the drag chain shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to be able to more clearly understand the technical essence and beneficial effects of the present invention, the applicant will make a detailed description below in the form of embodiments. However, the description of the embodiments is not a limitation to the technical solution of the present invention. Any equivalent transformation that is only formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solution of the present invention.

[0020] In the following description, all concepts related to the directionality or orientation such as up, down, left, right, front and back are based on Figure 1 the position state, and thus cannot be understood as a special limitation to the technical solution provided by the present invention.

[0021] Please refer toFigure 1 , shows a drag chain guide mechanism 1, which is arranged on the car floor in the use state along the side of the car seat slide rail facing away from the car seat in the length direction. More specifically, the drag chain guide mechanism 1 is arranged on the car floor at a position parallel to the front end of the car seat slide rail facing away from the car seat in the length direction; shows a drag chain 2 (the drag chain is also called a "tank chain", the same below), which is connected to the drag chain guide mechanism 1 at one end (i.e. the first end of the drag chain 2) facing the aforementioned drag chain guide mechanism 1, and the middle part forms a sliding pair with the drag chain guide mechanism 1, and the other end of the drag chain 2 (i.e. the second end of the drag chain 2, i.e. the moving part connecting end of the drag chain 2) constitutes a moving part connecting end, which is connected to the moving slide rail of the car seat slide rail serving as the moving part in the use state.

[0022] The technical points of the technical solution provided by the present invention are as follows: the structural system of the wire harness retraction device for the aforementioned automobile seat also includes a drag chain guard 3, the rear end of the drag chain guard 3 is connected to the aforementioned drag chain guide mechanism 1 in a state corresponding to one end of the aforementioned drag chain 2 and the middle part of the drag chain 2, and shields the one end and the middle part of the drag chain 2, and the front end of the drag chain guard 3 is fixed to the aforementioned vehicle floor when in use.

[0023] The aforementioned drag chain guide mechanism 1 includes a drag chain sliding seat 11, a drag chain sliding seat cover 12 and a drag chain guide block 13. The drag chain sliding seat 11 is fixed to the car floor on the side of the car seat slide rail facing away from the car seat in the length direction when in use. More specifically, the drag chain sliding seat 11 is fixed to the car floor in a state parallel to the front end of the car seat slide rail in the length direction (the side facing away from the car seat), and on the side of the drag chain sliding seat 11 facing upward It is composed of a drag chain sliding groove 111, the drag chain sliding seat cover 12 is fixed to the upward surface of the drag chain sliding seat 11 and at the same time closes the upper opening of the aforementioned drag chain sliding groove 111, and the drag chain guide block 13 is embedded in the left front side of the drag chain sliding seat 11; the middle part of the aforementioned drag chain 2 forms a sliding pair with the aforementioned drag chain sliding groove 111 and also forms a sliding pair with the right upward side of the aforementioned drag chain block 13; the rear end of the aforementioned drag chain guard 3 is fixedly connected to the right front side of the aforementioned drag chain sliding seat 11.

[0024] Please continue to see Figure 1 A drag chain fixing seat fixing foot 112 is formed on the left end wall of the aforementioned drag chain sliding seat 11 and the center position of the rear side wall. A fixing foot fixing hole 1121 is opened on the bottom wall of the fixing foot of the drag chain fixing seat 112, and the drag chain seat fixing foot 112 is fixed to the aforementioned car floor by screws at the position corresponding to the fixing foot fixing hole 1121.

[0025] The front side of the left end of the aforementioned drag chain sliding groove 111 forms a drag chain left sliding opening 1112, and the front side of the right end of the drag chain sliding groove 111 forms a drag chain right sliding opening 1113. The drag chain left and right sliding openings 1112, 1113 communicate the drag chain sliding groove 111 with the outside, and the shape of the drag chain sliding groove 111 is C-shaped (also called "semicircular arc"); a retaining foot groove 117 is opened at the position in front of the left end wall of the aforementioned drag chain sliding seat 11, and a retaining foot 131 is formed at the left rear side of the aforementioned drag chain guide block 13 and at the position corresponding to the retaining foot groove 117. The retaining foot 131 is fitted with the aforementioned retaining foot groove 117. On the upper side facing upward of the right end of the drag chain guide block 13 and at the position corresponding to the aforementioned drag chain left sliding opening 1112, a guide block drag chain groove 132 is formed. The aforementioned drag chain 2 forms a sliding pair with the aforementioned drag chain left and right sliding openings 1112, 1113 and the guide block drag chain groove 132; one end of the aforementioned drag chain 2 is hinged to the front side of the right end of the aforementioned drag chain sliding seat 11; the aforementioned drag chain sliding seat cover plate 12 is fixed to the upward-facing side of the drag chain sliding seat 11 by screws and completely shields the aforementioned drag chain sliding groove 111.

[0026] On the upper part and the lower part of the front of the right end of the aforementioned drag chain sliding seat 11 and at the corresponding positions of each other, a drag chain shield limiting seat 113 protruding from the surface of the drag chain sliding seat 11 is formed, and the middle part of the rear end of the aforementioned drag chain shield 3 for shielding one end and the middle part of the aforementioned drag chain 2 is matched with the drag chain shield limiting seat 113.

[0027] As shown by Figure 1 a pair of vertically corresponding drag chain hinge ears 114 are formed at the front side of the right end of the aforementioned drag chain sliding seat 11 and at the position corresponding to one end of the aforementioned drag chain 2. A drag chain hinge ear joint shaft head hinge hole 1141 is opened on the pair of drag chain hinge ears 114. One end of the aforementioned drag chain 2 extends between the pair of drag chain hinge ears 114 and is hinged between the pair of drag chain hinge ears 114 at the position corresponding to the drag chain hinge ear joint shaft head hinge hole 1141; a wire harness guiding opening 115 is formed on the drag chain sliding seat 11 and at the position corresponding to the rear of one end of the aforementioned drag chain 2.

[0028] Continue to see Figure 1 And in combination with Figure 2 a drag chain connecting seat 4 is connected to the moving part connecting end of the aforementioned drag chain 2. A connecting retaining foot 41 is formed on the upper part of the drag chain connecting seat 4. In the use state, the connecting retaining foot 41 is connected to the automotive seat slide rail as the aforementioned moving part.

[0029] Please refer to Figure 2 And in combination with Figure 1, a drag chain shield limit seat mating notch 31 is provided in the middle of the rear end of the aforementioned drag chain shield 3. The drag chain shield limit seat mating notch 31 is mated with the aforementioned drag chain shield limit seat 113, that is, the aforementioned drag chain shield limit seat 113 is located within the drag chain shield limit seat mating notch 31. At the rear end of the drag chain shield 3 and at positions respectively on the left and right sides of the drag chain shield limit seat mating notch 31, a drag chain shield rear end fixing screw hole 32 is provided. On the aforementioned drag chain sliding seat 11 and at positions respectively on the left and right sides of the aforementioned drag chain shield limit seat 113, a drag chain shield fixing screw hole 116 corresponding to the aforementioned drag chain shield rear end fixing screw hole 32 in position is provided. The rear end of the drag chain shield 3 is fixedly connected to the aforementioned drag chain sliding seat 11 by a drag chain shield rear end fixing screw at positions corresponding to the drag chain shield rear end fixing screw hole 32 and the drag chain shield fixing screw hole 116. A drag chain shield mounting and fixing seat 33 is fixed at the front end of the drag chain shield 3. In the use state, the drag chain shield mounting and fixing seat 33 is fixed to the carriage floor of the aforementioned vehicle; one end and the middle of the aforementioned drag chain 2 are located within the drag chain shield cavity 34 of the drag chain shield 3.

[0030] Continue to see Figure 1 and Figure 2 , a mounting relief opening 35 is formed at the left front of the aforementioned drag chain shield 3, and an insertion panel compensation opening 36 is formed at the right front. At the left end of the aforementioned drag chain shield fixing seat 33 and at a position corresponding to the aforementioned mounting relief opening 35, a mounting relief cavity 331 is formed. A carriage floor fixing screw hole 33111 is provided on the mounting relief cavity bottom wall 3311 of the mounting relief cavity 331. In the use state, the mounting relief cavity bottom wall 3311 is fixed to the carriage floor of the aforementioned vehicle by a mounting relief cavity bottom wall fixing screw at a position corresponding to the carriage floor fixing screw hole 33111. An insertion panel 332 is formed at the upper right end of the drag chain shield fixing seat 33, and the insertion panel 332 is in insertion fit with the aforementioned insertion panel compensation opening 36; a drag chain shield fixing screw hole 37 is provided at the front end of the drag chain shield 3, and a drag chain shield fixing seat screw hole 333 is provided on the aforementioned drag chain shield fixing seat 33 and at a position corresponding to the drag chain shield fixing screw hole 37. The drag chain shield fixing seat 33 is fixed to the front end of the aforementioned drag chain shield 3 by a drag chain shield fixing seat screw disposed on the drag chain shield fixing screw hole 37 at a position corresponding to the drag chain shield fixing seat screw 333.

[0031] Please refer to Figure 3 and in combination with Figure 1 and Figure 2, the aforementioned drag chain 2 is composed of a plurality of link units 21 connected in a loop in the length direction. The aforementioned link unit 21 includes a skeleton 211, a joint guide slider 212, a joint shaft head hinge seat 213, and a joint shaft head 214. The skeleton 211 is formed with a skeleton wire harness through cavity 2111 communicating with the outside at both ends. The joint guide sliders 212 are respectively formed on the upper skeleton wall 2112 and the lower skeleton wall 2113 of the skeleton 211 in a symmetric state (also referred to as the upper and lower corresponding state, the same hereinafter). And the end face of the joint guide slider 212 is formed as a guide slider sliding surface 2121. The joint shaft head hinge seats 213 are also formed on the upper skeleton wall 2112 and the lower skeleton wall 2113 of the aforementioned skeleton in a symmetric state. And the joint shaft head hinge seat 213 is formed with a joint shaft head hinge cavity 2131. The joint shaft heads 214 are respectively formed on the upper skeleton wall 2112 and the lower skeleton wall 2113 of the carriage ********* and are located on one side of the aforementioned joint guide slider 212. The joint shaft head 214 is hinged to the joint shaft head hinge cavity 2131 of the joint shaft head hinge seat 213 of an adjacent link unit 21. Among them, the joint shaft head 214 of the first link unit 21 at one end of the drag chain 2 is hinged to the joint shaft head hinge hole 1141 of the aforementioned drag chain hinge ear. And the joint shaft head hinge cavity 2131 of the joint shaft head hinge seat 213 of the last link unit 21 at the other end of the drag chain 2 is hinged to the aforementioned drag chain hinge seat 4. From the above description, it can be seen that the sliding of the drag chain 2 is realized through the guiding action of the aforementioned guide slider sliding surface *********

[0032] On the aforementioned drag chain hinge seat 4 and on one side facing the joint shaft head hinge seat 213 of the aforementioned last link unit 21, a pair of drag chain hinge seat hinge ears 43 corresponding to each other in the up and down positions are formed. On each of the opposite sides of the pair of drag chain hinge seat hinge ears 43, a drag chain hinge seat hinge ear shaft head 431 is formed. The drag chain hinge seat hinge ear shaft head 431 extends into the joint shaft head hinge cavity 2131 of the joint shaft head hinge seat 213 of the aforementioned last link unit 21. The aforementioned drag chain hinge seat 4 is formed with a drag chain hinge seat wire harness lead-out cavity 42. The drag chain hinge seat wire harness lead-out cavity 42 communicates with the aforementioned skeleton wire harness through cavity 2111 and also communicates with the outside at the same time. The wire harness led out from the drag chain hinge seat wire harness lead-out cavity 42 is electrically connected to an electrical controller provided on the vehicle seat.

[0033] It should be noted that there are some parts in the original text where the content seems to be incomplete (indicated by *********), which may affect the accuracy of the overall translation. You may need to check and supplement the complete text for a more perfect translation.The present invention is installed on the vehicle floor together with the automotive seat slide rail. The wiring harness (not shown in the figure) passes through the aforementioned wiring harness guiding port 115 in sequence, passes through the wiring harness passing cavity 2111 of the skeleton 211 of all the link units 21 constituting the drag chain 2, and is led out of the drag chain hinge seat wiring harness passing cavity 42 of the drag chain connecting seat 4 and is electrically connected to the electrical controller that is usually provided on the automotive seat and belongs to the structural system of the seat. Since the form of connection between the wiring harness and the electrical controller belongs to the prior art, for example, reference can be made to, but not limited to, CN222650483U, CN110574250A, etc., the applicant will not elaborate further.

[0034] When the automotive seat is adjusted backward (taking the sitting direction of the occupant as an example), then the automotive seat slide rail, as a moving part, slides backward along the main slide rail, drives the drag chain connecting seat 4 to slide accordingly through the connecting lug 41, and the drag chain 2 previously received in the drag chain shield cavity 34 extends outward through the drag chain sliding groove 111, such as forward to the position state shown in the present application. Figure 1 Conversely, when the automotive seat needs to be adjusted forward, then the redundant part of the drag chain 2 is received in the drag chain shield cavity 34 in an S-shaped or serpentine state through the drag chain sliding groove 111. Since the principle of the aforementioned moving slide rail driving the automotive seat to move forward and backward belongs to the prior art, for example, reference can be made to, but not limited to, Chinese Patent Publication No. CN119428374A, CN113320450A, CN113335151A, etc., the applicant will not repeat it.

[0035] In the above process, since the wiring harness is effectively protected by the drag chain 2, situations such as pulling, winding, and friction will not occur.

[0036] Although the applicant has cited an example applied to the moving slide rail in the present invention, it is not specifically limited. For example, a leg rest, etc. can also be applicable.

[0037] In summary, the technical solution provided by the present invention makes up for the deficiencies in 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 telescopic device for an automotive seat, comprising a drag chain guiding mechanism (1), which is arranged on the vehicle floor on one side of the automotive seat slide rail of the vehicle seat in the length direction facing away from the automotive seat in the use state; a drag chain (2), one end of the drag chain (2) facing the drag chain guiding mechanism (1) is connected to the drag chain guiding mechanism (1), the middle part forms a sliding pair with the drag chain guiding mechanism (1), and the other end of the drag chain (2) is configured as a moving part connection end, which is connected to the moving slide rail of the automotive seat slide rail in the use state; characterized in that: It further includes a drag chain shield (3). The rear end of the drag chain shield (3) is connected to the drag chain guiding mechanism (1) in a state corresponding to one end and the middle part of the drag chain (2), and shields the drag chain (2), while the front end of the drag chain shield (3) is fixed to the carriage floor in the use state.

2. The wire harness telescopic device for an automotive seat according to claim 1, wherein: The described drag chain guiding mechanism (1) includes a drag chain sliding seat (11), a drag chain sliding seat cover plate (12) and a drag chain guide block (13). The drag chain sliding seat (11) is fixedly arranged on the carriage floor on one side of the length direction of the vehicle seat slide rail of the vehicle facing away from the vehicle seat in the use state, and a drag chain sliding groove (111) is formed on the upward side of the drag chain sliding seat (11). The drag chain sliding seat cover plate (12) is fixed to the upward surface of the drag chain sliding seat (11) and simultaneously closes the upper opening of the drag chain sliding groove (111). The drag chain guide block (13) is fixedly embedded at the front side of the left end of the drag chain sliding seat (11). The middle part of the drag chain (2) forms a sliding pair with the drag chain sliding groove (111) and also forms a sliding pair with the upward side of the right end of the drag chain block (13). The rear end of the drag chain shield (3) is fixedly connected to the front side of the right end of the drag chain sliding seat (11).

3. The wire harness telescopic device for an automotive seat according to claim 2, characterized in that: A drag chain fixing seat fixing foot (112) is formed at the center position of the left end wall and the rear side wall of the drag chain sliding seat (11). A fixing foot fixing hole (1121) is opened on the bottom wall of the fixing foot of the drag chain fixing seat fixing foot (112). The drag chain seat fixing foot (112) is fixed to the carriage floor by screws at positions corresponding to the fixing foot fixing holes (1121).

4. The wire harness telescopic device for an automotive seat according to claim 2, characterized in that: A drag chain left sliding opening (1112) is formed at the front side of the left end of the drag chain sliding groove (111), and a drag chain right sliding opening (1113) is formed at the front side of the right end of the drag chain sliding groove (111). The drag chain sliding groove (111) communicates with the outside through the left and right drag chain sliding openings (1112, 1113), and the shape of the drag chain sliding groove (111) is C-shaped. A clamping foot groove (117) is opened at the front position of the left end wall of the drag chain sliding seat (11), and a clamping foot (131) is formed at the rear side of the left end of the drag chain guide block (13) and at a position corresponding to the clamping foot groove (117). The clamping foot (131) is fitted with the clamping foot groove (117). A guide block drag chain groove (132) is formed at the upward side of the right end of the drag chain guide block (13) and at a position corresponding to the left drag chain sliding opening (1112). The drag chain (2) forms a sliding pair with the left and right drag chain sliding openings (1112, 1113) and the guide block drag chain groove (132). One end of the drag chain (2) is hinged to the front side of the 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 wire harness telescopic device for an automotive seat according to claim 2, wherein: On the upper and lower parts in front of the right end of the drag chain sliding seat (11) and at corresponding positions, there is respectively formed a drag chain shield limit seat (113) protruding from the surface of the drag chain sliding seat (11), which is used to cooperate with the middle part of the rear end of the drag chain shield (3) that shields one end and the middle part of the drag chain (2); on the front side of the right end of the drag chain sliding seat (11) and at a position corresponding to one end of the drag chain (2), there are formed a pair of vertically corresponding drag chain hinge ears (114), and a drag chain hinge ear joint shaft head hinge hole (1141) is provided on the pair of drag chain hinge ears (114). One end of the drag chain (2) extends between the pair of drag chain hinge ears (114) and is hinged between the pair of drag chain hinge ears (114) at a position corresponding to the drag chain hinge ear joint shaft head hinge hole (1141); on the drag chain sliding seat (11) and at a position corresponding to the rear of one end of the drag chain (2), there is formed a wire harness guiding port (115).

6. The wire harness telescopic device for an automotive seat according to claim 1, characterized in that: A drag chain connecting seat (4) is connected to the moving part connection end of the drag chain (2). A connecting clip foot (41) is formed on the upper part of the drag chain connecting seat (4), and in the use state, the connecting clip foot (41) is connected to the automobile seat slide rail.

7. The wire harness telescopic device for an automotive seat according to claim 5, characterized in that: A drag chain shield limit seat mating notch (31) is provided in the middle of the rear end of the drag chain shield (3), and the drag chain shield limit seat mating notch (31) cooperates with the drag chain shield limit seat (113). At the rear end of the drag chain shield (3) and at positions respectively on the left and right sides of the drag chain shield limit seat mating notch (31), there are respectively provided a drag chain shield rear end fixing screw hole (32). On the drag chain sliding seat (11) and at positions respectively on the left and right sides of the drag chain shield limit seat (113), there are respectively provided a drag chain shield fixing screw hole (116) whose position corresponds to the drag chain shield rear end fixing screw hole (32). The rear end of the drag chain shield (3) is fixedly connected to the drag chain sliding seat (11) by a drag chain shield rear end fixing screw at positions corresponding to the drag chain shield rear end fixing screw hole (32) and the drag chain shield fixing screw hole (116). A drag chain shield mounting and fixing seat (33) is fixed at the front end of the drag chain shield (3). In the use state, the drag chain shield mounting and fixing seat (33) is fixed to the vehicle floor; one end and the middle part of the drag chain (2) are located in the drag chain shield cavity (34) of the drag chain shield (3).

8. The wire harness telescopic device for an automotive seat according to claim 7, wherein: At the left front of the drag chain shield (3), an installation relief opening (35) is formed, and at the right front, an insertion panel compensation opening (36) is formed. At the left end of the drag chain shield fixing seat (33) and corresponding to the installation relief opening (35), an installation relief cavity (331) is formed. On the bottom wall (3311) of the installation relief cavity (331), a carriage floor fixing screw hole (33111) is provided. In the use state, the bottom wall (3311) of the installation relief cavity is fixed to the carriage floor by an installation relief cavity bottom fixing screw at a position corresponding to the carriage floor fixing screw hole (33111). At the upper right end of the drag chain shield fixing seat (33), an insertion panel (332) is formed, and the insertion panel (332) is in insertion fit with the insertion panel compensation opening (36); at the front end of the drag chain shield (3), a drag chain shield fixing screw hole (37) is provided, and on the drag chain shield fixing seat (33) and corresponding to the drag chain shield fixing screw hole (37), a drag chain shield fixing seat screw hole (333) is provided. The drag chain shield fixing seat (33) is fixed to the front end of the drag chain shield (3) by a drag chain shield fixing seat screw disposed on the drag chain shield fixing screw hole (37) at a position corresponding to the drag chain shield fixing seat screw (333).

9. The wire harness telescopic device for an automotive seat according to claim 5, wherein: The drag chain (2) is composed of a plurality of link units (21) connected in a cycle in the length direction. The link unit (21) includes a skeleton (211), a joint guide slider (212), a joint shaft head hinge seat (213), and a joint shaft head (214). The skeleton (211) is provided with a skeleton wire harness passing cavity (2111) communicating with the outside at both ends. The joint guide sliders (212) are respectively formed symmetrically on the upper wall body (2112) and the lower wall body (2113) of the skeleton of the skeleton (211), and the end face of the joint guide slider (212) is formed as a guide slider sliding surface (2121). The joint shaft head hinge seats (213) are also formed symmetrically on the upper wall body (2112) and the lower wall body (2113) of the skeleton, and the joint shaft head hinge seat (213) is provided with a joint shaft head hinge cavity (2131). The joint shaft heads (214) are respectively formed symmetrically on the upper wall body (2112) and the lower wall body (2113) of the skeleton of the carriage (211) and are located on one side of the joint guide slider (212). The joint shaft head (214) is hinged to the joint shaft head hinge cavity (2131) of the joint shaft head hinge seat (213) of an adjacent link unit (21); among them, the joint shaft head (214) of the first link unit (21) at one end of the drag chain (2) is hinged to the drag chain hinge lug joint shaft head hinge hole (1141), and the joint shaft head hinge cavity (2131) of the joint shaft 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 hinge seat (4).

10. The wire harness telescopic device for an automotive seat according to claim 9, wherein: On the drag chain hinge seat (4) and on one side facing the joint shaft head hinge seat (213) of the last link unit (21), a pair of drag chain hinge seat hinge ears (43) corresponding to each other vertically in position are formed. On each of the pair of drag chain hinge seat hinge ears (43) and on the side facing away from each other, a drag chain hinge seat hinge ear shaft head (431) is formed. The drag chain hinge seat hinge ear shaft head (431) extends into the joint shaft head hinge cavity (2131) of the joint shaft head hinge seat (213) of the last link unit (21); the drag chain hinge seat (4) is formed with a drag chain hinge seat wire harness lead-out cavity (42), and the drag chain hinge seat wire harness lead-out cavity (42) communicates with the skeleton wire harness through cavity (2111) and at the same time communicates with the outside. The wire harness led out from the drag chain hinge seat wire harness lead-out cavity (42) is electrically connected to the electrical controller provided on the vehicle seat.

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