A long slide rail device for a vehicle seat

Abstract

A long slide rail device for a vehicle seat, comprising: a pair of sliding guide rails, arranged on both sides of the vehicle body floor and having a sliding guide rail inner cavity, and a sliding guide rail opening groove is provided on the upper surface of the sliding guide rail facing upward; a pair of wire harness guide rails, arranged at the middle position of the vehicle body floor and parallel to the sliding guide rails and capable of accommodating wire harness pipes; a pair of wire harness sliding guide modules, arranged in the wire harness guide rails and capable of driving the wire harness pipes to move; two sliding mechanisms, arranged in the sliding guide rail inner cavities corresponding to them respectively; two groups of driving components, respectively connected to the sliding mechanisms corresponding to them; two backlash elimination and locking mechanisms, respectively installed in the sliding guide rail inner cavities corresponding to them respectively and respectively connected to the two groups of driving components. Advantages: simple structure, reliable and durable, helpful for achieving the cleanliness of the vehicle body floor and no structural parts exposed after the vehicle seat is disassembled, facilitating subsequent operations, high locking strength and clearance elimination, ensuring the smooth and reliable movement of the vehicle seat.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts, and in particular relates to a long slide rail device for a vehicle seat. Background Art

[0002] With the continuous improvement of the intelligence level of my country's automobile industry and the rapid development of unmanned driving technology, the seats that originally only existed in large-space models with multiple rows of seats such as MPVs and use long slide rails for long-stroke adjustment have become more and more the focus of current intelligent automobile research and development. In order to meet their own needs such as rest and cargo, users often need to remove the seats using long slide rails to make room, but for the existing long slide rail devices installed on the bottom plate of the vehicle body, once the vehicle seats are removed, the structural parts on the long slide rail devices are often easily exposed, which greatly affects the subsequent operations and is not conducive to rapid disassembly. At the same time, with the development of the current trend of automobile intelligence and electrification, more electrical devices are installed in the car, and many electronic devices such as ventilation and heating parts, occupancy sensors, etc. are also installed on the car seats, which requires a large number of electronic wiring harnesses, but the existing long slide rail devices are often unable to reasonably accommodate or classify these electronic wiring harnesses. After the seat is removed, the wiring harness is exposed, which brings a series of subsequent problems.

[0003] In view of the above situation, it is necessary to reasonably improve the long slide rail device of the existing automobile seat. For this reason, the applicant has made a useful design, and the technical scheme to be introduced below is produced under this background. Summary of the invention

[0004] The task of the present invention is to provide a long slide rail device for vehicle seats which is simple in structure, reliable and durable, helps to keep the vehicle body floor clean and free of exposed structural parts after the vehicle seat is removed, thereby facilitating subsequent operations, and has high locking strength and can efficiently eliminate gaps.

[0005] The task of the present invention is accomplished as follows. A long slide rail device for a vehicle seat includes: a pair of long slide rails symmetrically arranged on both sides of the vehicle body floor, both having a slide rail inner cavity running through their length directions, and a slide rail opening groove extending along the length direction is provided on the upper side surface of the slide rail facing upward; a pair of long wire harness rails arranged at the middle position of the vehicle body floor, both being parallel to the slide rails and capable of accommodating wire harness pipes; a pair of wire harness sliding guide modules respectively arranged in their corresponding wire harness rails and capable of driving the wire harness pipes accommodating the wire harnesses connected to the seat electronic components to move; two sliding mechanisms both connected and installed with the vehicle seat frame, the two sliding mechanisms are respectively arranged in their corresponding slide rail inner cavities and can reciprocate back and forth in the slide rail inner cavities; two sets of driving components respectively inserted into their corresponding slide rails and both protruding upward through the slide rail opening grooves, the two sets of driving components are respectively connected to their corresponding sliding mechanisms and can drive the sliding mechanisms to reciprocate; two backlash elimination and locking mechanisms respectively installed in their corresponding slide rail inner cavities and respectively connected to the two sets of driving components, the two backlash elimination and locking mechanisms can lock the sliding mechanisms in the slide rail inner cavities of the slide rails in the locked state, and the two backlash elimination and locking mechanisms can also eliminate the gaps existing between the slide rails and the sliding mechanisms in the up-and-down and left-and-right directions.

[0006] In a specific embodiment of the present invention, a pair of decorative dust-proof strips are fitted on the upper part of the top panel of the slide rail, and the pair of decorative dust-proof strips extend along the length direction of the slide rail and are symmetrically arranged on both sides of the slide rail opening groove.

[0007] In another specific embodiment of the present invention, a plurality of slide rail mounting holes are arranged at intervals along the length direction on the bottom panel of the slide rail.

[0008] In still another specific embodiment of the present invention, both of the two sliding mechanisms include a pair of sliding plates arranged inside the slide rail inner cavity, the pair of sliding plates are symmetrically arranged, and a sliding guide wheel is arranged at both ends of the opposite side surface of the two sliding plates. The sliding guide wheel is in contact with the bottom panel of the slide rail and can roll on the bottom panel; and a guide rod is further connected to the end position of one of the two sliding plates of a sliding mechanism close to the driving component, and the guide rod is connected to the driving component; a pair of sliding plate connection convex blocks are further formed on the upper parts of the two sliding plates of a sliding mechanism, and the two pairs of sliding plate connection convex blocks are symmetrically arranged with the vertical center line of the sliding plate as the axis of symmetry.

[0009] In yet another specific embodiment of the present invention, the driving assembly includes a receiving box body that extends downward into the inner cavity of the sliding guide rail. The receiving box body is composed of left and right shells that are connected and fastened to each other. Both the upper and lower ends of the receiving box body are open. Inside the receiving box body, a pull rope member, an upper positioning shaft, a driving plate and a driven plate hinged on the upper positioning shaft, a lower positioning shaft, and a driving plate rotatably mounted on the lower positioning shaft are sequentially arranged from top to bottom. The lower end of the pull rope member forms a pull rope head that can move up and down under the action of an external force. The axial two ends of the upper positioning shaft are respectively connected to the left and right shells of the receiving box body. One end of the driving plate close to the pull rope member forms a driving plate connecting portion, and the pull rope head is inserted into the driving plate connecting portion. A driven plate connecting shaft is installed on the driven plate at a position corresponding to the upper part of the driving plate connecting portion. A return torsion spring is also sleeved on the shaft body of the upper positioning shaft. A driving plate protrusion is convexly provided on the driving plate at a position corresponding to one end of the return torsion spring, and the driving plate protrusion abuts against one end of the return torsion spring. A tension spring extending downward is also provided on the driven plate connecting shaft. The upper end of the tension spring is hooked on the driven plate connecting shaft, and the lower end of the tension spring is hooked on the plate part above the middle of the driving plate. The axial two ends of the lower positioning shaft are respectively connected to the left and right shells of the receiving box body. The upper end of the driving plate abuts against the lower end of the driven plate. The middle part of the driving plate is hinged on the lower positioning shaft, and a driving groove is formed at the lower end of the driving plate. The guide rod of the sliding mechanism is fitted and installed in the driving groove.

[0010] In still another specific embodiment of the present invention, the backlash elimination and locking mechanism includes a locking plate, a pair of linkage hinge plates disposed on both sides in the length direction of the locking plate, and two backlash elimination members. At both ends near the end portions in the length direction of the locking plate, locking plate positioning rods extending in the vertical direction are respectively inserted. A locking return spring is sleeved on each of the locking plate positioning rods. The locking return spring also extends upward in the vertical direction and passes through the locking plate body. The diameter of the lowermost end of the locking return spring located below the locking plate is larger than the body diameter of the upper part of the locking plate, and the portion of the locking return spring located below the locking plate is in a conical structure that gradually contracts from bottom to top. The two linkage hinge plates are in a hook-shaped structure. The middle of the linkage hinge plate is hinged and installed with the sliding plates on both sides through a hinge shaft, and one end of the linkage hinge plate abuts against the downward-facing side surface of the locking plate. The backlash elimination member is in a T-shaped plate structure, and the backlash elimination member is provided with a backlash elimination member connecting rod and a pair of backlash elimination sleeve blocks. The backlash elimination member connecting rod is connected to the end of the linkage hinge plate far from the locking plate, and the two backlash elimination sleeve blocks are respectively sleeved on the sliding plate connection protrusions of the sliding plates on both sides.

[0011] After the present invention adopts the above structure, it has the following technical effects: First, by providing a wire harness guide rail on the vehicle floor that can be used to accommodate the wire harness, its structure is compact, which can realize the regular storage of the wire harness and prevent wire entanglement. The wire harness sliding guide module can drive the wire harness pipeline to move smoothly and reliably in the wire harness guide rail, which can meet the follow-up of the wire harness for electrical connection during the movement of the seat. At the same time, by providing a pair of sliding guide rails, the efficient storage of structural parts can be realized. When the vehicle seat needs to be disassembled, it can be quickly disassembled, and no structural parts leak out of the vehicle body floor after disassembly, ensuring a clean and refreshing effect. Second, by adopting the structure in which the backlash elimination member of the backlash elimination and locking mechanism is mutually locked with the sliding plate, and when the backlash elimination sleeve block with a backlash elimination function and the sliding plate connection protrusion are in the locked state of the sliding mechanism, it can ensure a small gap between the sliding plate and the sliding guide rail in the up-down and left-right directions. At the same time, when the backlash elimination sleeve block moves towards the inside of the sliding plate connection protrusion, the two are in a released state, so as to realize the smooth sliding of the sliding plate and ensure the smooth and reliable movement of the vehicle seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0013] Figure 2 is Figure 1 a schematic diagram of the structure of the sliding mechanism and the drive assembly in the shown embodiment.

[0014] Figure 3 is Figure 1 a schematic diagram of the structure of the sliding mechanism and the backlash elimination and locking mechanism in the shown embodiment.

[0015] In the figure: 1. Sliding guide rail, 11. Inner cavity of the sliding guide rail, 12. Open slot of the sliding guide rail, 13. Decorative dust-proof strip, 14. Mounting hole of the sliding guide rail; 2. Wiring harness guide rail; 3. Wiring harness sliding guiding module; 4. Sliding mechanism, 41. Sliding plate, 411. Connecting convex block of the sliding plate, 42. Sliding guide wheel, 43. Guide rod; 5. Driving assembly, 51. Accommodating box body, 52. Pulling rope member, 521. Pulling rope head, 53. Upper positioning shaft, 531. Reset torsion spring, 54. Active plate, 541. Connecting portion of the active plate, 542. Protrusion of the active plate, 55. Driven plate, 551. Connecting shaft of the driven plate, 552. Tensile spring, 56. Lower positioning shaft, 57. Driving plate, 571. Driving slot; 6. Backlash elimination and locking mechanism, 61. Locking plate, 611. Positioning rod of the locking plate, 612. Locking and reset spring, 62. Linkage hinge plate, 63. Backlash elimination member, 631. Link of the backlash elimination member, 632. Backlash elimination sleeve block. Detailed implementation mode

[0016] In order to more clearly understand the technical essence and beneficial effects of the present invention, detailed descriptions will be given below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the solutions of the present invention. Any equivalent transformation that is merely formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0017] In the following descriptions, all directional or positional concepts such as up, down, left, right, front and back are based on Figure 1 the position state where it is located, and thus cannot be understood as a special limitation on the technical solutions provided by the present invention.

[0018] Please refer to Figures 1 to 3, which shows a long slide rail device for a vehicle seat, including a pair of long slide rails 1, symmetrically arranged on both sides of the vehicle body floor and both having a slide rail inner cavity 11 running through their length directions, and a slide rail opening groove 12 extending along the length direction is provided on the upper side surface of the slide rail 1 facing upward; a pair of long wire harness rails 2 are shown, arranged at the middle position of the vehicle body floor and both are parallel to the slide rail 1 and can be used to accommodate wire harness pipes. A pair of wire harness slide guiding modules 3 are also shown, respectively arranged in their corresponding wire harness rails 2 and can drive the wire harness pipes accommodating the wires connected to the seat electronic components to move. For the specific structural information of the wire harness rail 2 and the wire harness slide guiding module 3, reference can be made to the "Wire Harness Storage Device for a Vehicle Seat" disclosed in the Chinese utility model patent with the authorized patent number CN214689363U; two slide mechanisms 4 are shown, both connected and installed with the vehicle seat frame. The two slide mechanisms 4 are respectively arranged in their corresponding slide rail inner cavities 11 and can reciprocate back and forth in the slide rail inner cavity 11 to drive the vehicle seat to reciprocate back and forth; two sets of driving components 5 are shown, respectively passing through their corresponding slide rails 1 and both extending upward out of the slide rail opening groove 12. The two sets of driving components 5 are respectively connected to their corresponding slide mechanisms 4 and can drive the slide mechanisms 4 to reciprocate; two backlash elimination and locking mechanisms 6 are shown, respectively installed in their corresponding slide rail inner cavities 11 and respectively connected to the two sets of driving components 5. The two backlash elimination and locking mechanisms 6 can lock the slide mechanisms 4 in the slide rail inner cavity 11 of the slide rail 1 in the locked state, and the two backlash elimination and locking mechanisms 6 can also eliminate the gaps existing between the slide rail 1 and the slide mechanisms 4 in the up and down and left and right directions.

[0019] In this embodiment, a pair of decorative dust-proof strips 13 are fitted on the upper part of the top panel of the slide rail 1. The pair of decorative dust-proof strips 13 extend along the length direction of the slide rail 1 and are symmetrically arranged on both sides of the slide rail opening groove 12.

[0020] Furthermore, a plurality of slide rail mounting holes 14 are arranged at intervals along the length direction on the bottom panel of the slide rail 1.

[0021] Please refer to Figure 2 and Figure 3, both of the two sliding mechanisms 4 include a pair of sliding plates 41 disposed inside the inner cavity 11 of the aforementioned sliding guide rail. The pair of sliding plates 41 are symmetrically arranged, and at both ends of the opposite side surfaces of the two sliding plates 41, a sliding guide wheel 42 is provided. The aforementioned sliding guide wheel 42 contacts the bottom plate of the sliding guide rail 1 and can roll on the bottom plate; and at the end positions of the two sliding plates 41 of a sliding mechanism 4 close to the driving assembly 5, a guide rod 43 is further connected. The guide rod 43 is connected to the driving assembly 5; on the upper parts of the two sliding plates 41 of a sliding mechanism 4, a pair of sliding plate connection bumps 411 are formed. The two pairs of sliding plate connection bumps 411 are symmetrically arranged with the vertical center line of the sliding plate 41 as the axis of symmetry.

[0022] In this embodiment, both of the aforementioned driving assemblies 5 include a receiving box body 51. The receiving box body 51 extends downward into the inner cavity 11 of the aforementioned sliding guide rail, and the receiving box body 51 is composed of left and right interconnected and buckled shells. Both the upper and lower ends of the receiving box body 51 are open. Inside the receiving box body 51, a pull rope member 52, an upper positioning shaft 53, a driving plate 54 and a driven plate 55 hinged on the upper positioning shaft 53, a lower positioning shaft 56, and a driving plate 57 rotatably mounted on the lower positioning shaft 56 are sequentially arranged from top to bottom. The lower end of the aforementioned pull rope member 52 forms a pull rope head 521 that can move up and down under the action of an external force. The axial two ends of the aforementioned upper positioning shaft 53 are respectively connected to the left and right shells of the receiving box body 51. One end of the driving plate 54 close to the aforementioned pull rope member 52 forms a driving plate connecting portion 541. The pull rope head 521 is inserted into the driving plate connecting portion 541. On the driven plate 55 and at the upper position corresponding to the driving plate connecting portion 541, a driven plate connecting shaft 551 is installed. A return torsion spring 531 is also sleeved on the shaft body of the aforementioned upper positioning shaft 53. On the driving plate 54 and at the position corresponding to one end of the return torsion spring 531, a driving plate protrusion 542 is convexly formed. The driving plate protrusion 542 abuts against one end of the return torsion spring 531; a tension spring 552 extending downward is also provided on the driven plate connecting shaft 551. The upper end of the tension spring 552 is hooked on the driven plate connecting shaft 551, and the lower end of the tension spring 552 is hooked on the plate part above the middle of the aforementioned driving plate 57. The axial two ends of the aforementioned lower positioning shaft 56 are respectively connected to the left and right shells of the receiving box body 51. The upper end of the aforementioned driving plate 57 abuts against the lower end of the driven plate 55. The middle part of the driving plate 57 is hinged on the lower positioning shaft 56, and a driving groove 571 is formed at the lower end of the driving plate 57. The guide rod 43 of the aforementioned sliding mechanism 4 is fitted and installed in the driving groove 571.

[0023] Further, the backlash elimination and locking mechanism 6 includes a locking plate 61, a pair of linkage hinge plates 62 disposed on both sides in the length direction of the locking plate 61, and two backlash elimination members 63. Locking plate positioning rods 611 extending vertically are respectively inserted through positions near the two ends in the length direction of the locking plate 61. A locking return spring 612 is sleeved on each of the locking plate positioning rods 611. The locking return spring 612 also extends vertically upward and passes through the body of the locking plate 61. The diameter of the lowermost end of the locking return spring 612 at the lower part of the locking plate 61 is larger than the diameter of the body at the upper part of the locking plate 61, and the locking return spring 612 is in a conical structure that gradually contracts from bottom to top at the lower part of the locking plate 61. The two linkage hinge plates 62 are in a hook-like structure. The middle part of the linkage hinge plate 62 is hinged and installed with the sliding plates 41 on both sides through a hinge shaft. One end of the linkage hinge plate 62 abuts against the downward-facing side surface of the locking plate 61. The backlash elimination member 63 is in a T-shaped plate structure, and the backlash elimination member 63 is provided with a backlash elimination member connecting rod 631 and a pair of backlash elimination sleeve blocks 632. The backlash elimination member connecting rod 631 is connected to the end of the linkage hinge plate 62 far from the locking plate 61, and the two backlash elimination sleeve blocks 632 are respectively sleeved on the sliding plate connecting protrusions 411 of the sliding plates 41 on both sides. When the sliding mechanism 4 is in the locked state, the backlash elimination sleeve blocks 632 are fitted and installed on the end of the sliding plate connecting protrusion 411 far from its connection with the body of the sliding plate 41 in the length direction and can eliminate the gaps existing between the sliding guide rail 1 and the sliding mechanism 4 in the vertical and horizontal directions. Thus, when the locking plate 61 is pressed downward by an external force and the seat is adjusted, the linkage hinge plate 62 flips under the downward drive of the locking plate 61 and drives the backlash elimination sleeve blocks 632 to move toward the inside of the sliding plate connecting protrusions 411, so that a fitting gap is generated between the backlash elimination sleeve blocks 632 and the sliding plate connecting protrusions 411, thereby achieving smooth sliding.

[0024] Please refer to Figures 1 to 3 , and briefly describe the working principle of the technical solution provided by the present invention: First, during assembly, the vehicle seat is placed above the sliding track 1 and the vehicle seat and the two sets of sliding mechanisms 4 are installed together through fasteners such as bolts. When the driver or passenger needs to move the seat forward and backward according to the actual riding experience, the locking plate 61 of the locking mechanism 6 is pressed downward by operating an external handle, so that the sliding mechanism 4 is in the unlocked state. At this time, the pulling rope head 521 of the pulling rope member 52 of the driving assembly 5 is pulled, which further drives the driving plate 54 and the driving plate 57 to move, thereby driving the guide rod 43 of the sliding mechanism 4 to move. Thus, the sliding plate 41 moves in the inner cavity 11 of the sliding guide rail and drives the seat to move forward and backward.

[0025] 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 long slide rail device for a vehicle seat, It is characterized in that include: A pair of elongated sliding guide rails (1) are symmetrically arranged on both sides of the vehicle body floor, and both have a sliding guide rail inner cavity (11) running through their length directions. A sliding guide rail opening groove (12) extending along its length direction is provided on the upper surface of the sliding guide rail (1) facing upwards; two sliding mechanisms (4) are both connected and installed to the vehicle seat frame. The two sliding mechanisms (4) are respectively arranged in the corresponding sliding guide rail inner cavities (11) and can reciprocate back and forth in the sliding guide rail inner cavities (11); two sets of driving components (5) are respectively inserted into the corresponding sliding guide rails (1), and both of them project upwards out of the sliding guide rail opening grooves (12). The two sets of driving components (5) are respectively connected to the corresponding sliding mechanisms (4) and can drive the sliding mechanisms (4) to reciprocate; each of the driving components (5) includes a receiving box body (51). The receiving box body (51) extends downwards into the sliding guide rail inner cavity (11), and the receiving box body (51) is composed of left and right shells connected and buckled with each other. Both the upper and lower ends of the receiving box body (51) are open. Inside the receiving box body (51), a pull rope member (52), an upper positioning shaft (53), a driving plate (54) and a driven plate (55) hinged on the upper positioning shaft (53), a lower positioning shaft (56), and a driving plate (57) rotatably installed on the lower positioning shaft (56) are sequentially arranged from top to bottom. The lower end of the pull rope member (52) forms a pull rope head (521) that can move up and down under the action of an external force. The axial two ends of the upper positioning shaft (53) are respectively connected to the left and right shells of the receiving box body (51). One end of the driving plate (54) close to the pull rope member (52) forms a driving plate connecting portion (541). The pull rope head (521) is inserted into the driving plate connecting portion (541). A driven plate connecting shaft (551) is installed on the driven plate (55) at a position corresponding to the upper part of the driving plate connecting portion (541). A return torsion spring (531) is also sleeved on the shaft body of the upper positioning shaft (53). A driving plate protrusion (542) is convexly provided on the driving plate (54) at a position corresponding to one end of the return torsion spring (531). The driving plate protrusion (542) abuts against one end of the return torsion spring (531);On the driven plate connecting shaft (551), a tension spring (552) extending downward is further provided. The upper end of the tension spring (552) is hooked on the driven plate connecting shaft (551), and the lower end of the tension spring (552) is hooked on the plate body part above the middle of the driving plate (57). The axial two ends of the lower positioning shaft (56) are respectively connected to the left and right shells of the accommodating box body (51), and the upper end of the driving plate (57) abuts against the lower end of the driven plate (55). The middle part of the driving plate (57) is hinged on the lower positioning shaft (56), and a driving groove (571) is formed at the lower end of the driving plate (57). The guide rod (43) of the sliding mechanism (4) is fitted and installed in the driving groove (571).; 2. A long slide rail device for a vehicle seat according to claim 1, Features: It also includes a pair of long strip-shaped harness guide rails (2), which are arranged at the middle position of the vehicle body floor and both are kept in parallel with the sliding guide rails (1) and can be used to store harness ducts; a pair of harness sliding guide modules (3), which are respectively arranged in the corresponding harness guide rails (2) and can drive the harness ducts that accommodate the harness connected to the seat electronic components to move.

3. A long slide rail device for a vehicle seat according to claim 1, Features: The invention also comprises two gap-eliminating locking mechanisms (6), which are respectively installed in the corresponding inner cavities (11) of the sliding guide rails and are respectively connected to the two sets of driving components (5). The two gap-eliminating locking mechanisms (6) can lock the sliding mechanism (4) in the inner cavity (11) of the sliding guide rail (1) in a locked state, and the two gap-eliminating locking mechanisms (6) can also eliminate the gap between the sliding guide rail (1) and the sliding mechanism (4) in the up-down and left-right directions.

4. A long slide rail device for a vehicle seat according to claim 1, Features: A pair of decorative dustproof strips (13) are embedded in the upper part of the top panel of the sliding guide rail (1), and the pair of decorative dustproof strips (13) extend along the length direction of the sliding guide rail (1) and are symmetrically arranged at two sides of the sliding guide rail opening groove (12).

5. The long slide rail device for a vehicle seat according to claim 1, Features A plurality of sliding guide rail mounting holes (14) are arranged on the bottom panel of the sliding guide rail (1) and at intervals along its length direction.

6. A long slide rail device for a vehicle seat according to claim 1, Features: The two sliding mechanisms (4) each include a pair of sliding plates (41) arranged inside the inner cavity (11) of the sliding guide rail, the pair of sliding plates (41) are symmetrically arranged and a sliding guide wheel (42) is arranged at both ends of the surfaces of the two sliding plates (41) on the opposite side, the sliding guide wheel (42) is in contact with the bottom plate of the sliding guide rail (1) and can roll on the bottom plate; and a guide rod (43) is connected to one end of the two sliding plates (41) of a sliding mechanism (4) close to the driving assembly (5), and the guide rod (43) is connected to the driving assembly (5); and a pair of sliding plate connecting protrusions (411) are formed on the upper parts of the two sliding plates (41) of a sliding mechanism (4), and the two pairs of sliding plate connecting protrusions (411) are symmetrically arranged with the vertical center line of the sliding plate (41) as the symmetry axis.

7. A long slide rail device for a vehicle seat according to claim 3, Features: The backlash elimination and locking mechanism (6) includes a locking plate (61), a pair of linkage hinge plates (62) arranged on both sides in the length direction of the locking plate (61), and two backlash elimination members (63). Locking plate positioning rods (611) extending in the vertical direction are respectively penetrated at positions near the ends at both ends in the length direction of the locking plate (61). A locking return spring (612) is sleeved on each of the locking plate positioning rods (611). The locking return spring (612) also extends upward in the vertical direction and passes through the body of the locking plate (61). The diameter of the lowermost end of the locking return spring (612) located at the lower part of the locking plate (61) is larger than the body diameter of the upper part of the locking plate (61). And the locking return spring (612) is in a conical structure that gradually shrinks from bottom to top at the lower part of the locking plate (61). The two linkage hinge plates (62) are in a hook-like structure. The middle part of the linkage hinge plate (62) is hinged and installed on the sliding plates (41) on both sides through a hinge shaft. And one end of the linkage hinge plate (62) abuts against the downward side surface of the locking plate (61). The backlash elimination member (63) is in a T-shaped plate structure. And the backlash elimination member (63) has a backlash elimination member connecting rod (631) and a pair of backlash elimination sleeve blocks (632). The backlash elimination member connecting rod (631) is connected to the end of the linkage hinge plate (62) far from the locking plate (61). And the two backlash elimination sleeve blocks (632) are respectively sleeved on the sliding plate connecting protrusions (411) of the sliding plates (41) on both sides.

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