Anti-backlash mechanism, automobile seat sliding rail with anti-backlash mechanism and automobile seat with anti-backlash mechanism

Abstract

The utility model discloses an anti-backlash mechanism, an automobile seat sliding rail provided with the anti-backlash mechanism and an automobile seat provided with the automobile seat sliding rail, and belongs to the technical field of automobile parts. Comprising an upper sliding rail matching frame; and the upper and lower sliding rail front lateral clearance compensation device and the upper and lower sliding rail rear lateral clearance compensation device are arranged on the upper sliding rail matching frame in a state of corresponding to each other in the front-back direction. The sliding rail has the advantages that the strength can be improved, the structure can be simplified, the excellent integration degree of parts can be reflected, the lasting use stability, the operation comfort and the reliability of the anti-backlash effect can be guaranteed, the sliding resistance of the sliding rail can be reduced when the sliding rail is adjusted, and the problem that the sliding rail is blocked in the adjusting process is solved; the provided automobile seat slide rail can extremely play an excellent role in eliminating a gap between the upper slide rail and the lower slide rail; the provided automobile seat can embody the advantages of an automobile seat slide rail provided with an anti-backlash mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a gap-eliminating mechanism, and also to an automotive seat slide rail equipped with the gap-eliminating mechanism and an automotive seat thereof. Background Technology

[0002] The aforementioned backlash elimination mechanism is applied to automotive seat slide rails. Broadly speaking, it eliminates the gap between the upper and lower slide rails (also known as "inner and outer slide rails" or "moving and stationary slide rails"), ensuring the stability and safety of the seat during movement. This is because automotive seat slide rails allow the car seat to move back and forth. If gaps exist, they can cause abnormal noises or vibrations while the vehicle is in motion, affecting ride comfort. The backlash elimination mechanism aims to reduce and / or eliminate these adverse factors.

[0003] The aforementioned backlash elimination mechanisms for automotive seat slide rails mainly include, but are not limited to, roller type, roller type, elastic compression type, linkage tension type, and inclined self-locking type, etc.

[0004] Several technical information related to gap-eliminating mechanisms can be found in publicly available Chinese patent documents. For example, CN215042255U recommends a "gap-eliminating structure and its elastic element for automobile seat slide rails," which involves pivoting one end of an H-shaped bracket, approximately offset by 90°, onto the upper slide rail, while an elastically deformable element and a bearing pivotally mounted on the bracket are provided at the other end of the bracket. The elastic element abuts against the corresponding end of the bracket, causing the bracket to lift upwards, and the bearing abuts against the top of the lower slide rail, thereby eliminating the gap between the upper and lower slide rails (see paragraphs 0039 to 0041 of the patent specification). Another example is CN213799340U, which describes a "gap-eliminating mechanism for automobile seat slide rails." By reading paragraphs 0022 to 0023 of the patent specification, it can be seen that it achieves the gap-eliminating effect by adjusting the compression fit gap between the outer edge of the gap-eliminating block and the inner wall of the lower slide rail through a contact adjustment mechanism. For example, CN220842279U provides a "roller gap-eliminating mechanism for an automobile seat slide rail". This patent directly sets elastic rollers on both sides of the upper slide rail (referred to as slide rail bracket in the patent). That is, a mounting seat insertion groove is formed on the front and rear sides of the left and right ends of the upper slide rail. A roller mounting seat is set in the mounting seat insertion groove, and the roller mounting seat and the elastic roller embedded therein are embedded in the mounting seat insertion groove, thereby eliminating the gap between the upper and lower slide rails. Furthermore, CN221213598U discloses a "gaps-eliminating mechanism for an automobile seat", the specific structure of which is described in paragraphs 0024 to 0030 of its specification.

[0005] Existing backlash elimination mechanisms, including those mentioned in the patents above, generally suffer from drawbacks such as complex structures, low strength, and poor stability. Complex structures increase the number of components, size, and failure rate, leading to higher manufacturing costs. Low strength affects the long-term stability of the backlash elimination effect, causing deformation or even complete damage, resulting in the reappearance of gaps, seat shaking, and technical problems such as slide rail jamming or adjustment malfunction. Therefore, exploring and designing backlash elimination mechanisms that are high-strength, simple in structure, and avoid problems during use such as instability, uncomfortable operation, poor backlash elimination function leading to abnormal noise, high slide rail sliding resistance, and slide rail adjustment jamming is of positive significance. Utility Model Content

[0006] The objective of this invention is to provide a gap-eliminating mechanism that helps to improve strength, significantly simplify the structure, and demonstrate excellent integration of components, thereby ensuring stability for long-term use, operational comfort, and reliability of the gap-eliminating effect. It also helps to reduce the sliding resistance of the slide rail during use and avoid problems such as jamming of the slide rail during adjustment.

[0007] Another objective of this invention is to provide an automotive seat slide rail equipped with a backlash elimination mechanism, which can fully realize the technical effects of the backlash elimination mechanism.

[0008] Another objective of this invention is to provide a car seat that embodies the advantages of the car seat slide rail equipped with a backlash elimination mechanism.

[0009] The present invention accomplishes its objective as follows: a gap-reducing mechanism includes an upper slide rail mounting frame; an upper and lower slide rail front lateral gap compensation device and an upper and lower slide rail rear lateral gap compensation device, wherein the upper and lower slide rail front lateral gap compensation device and the upper and lower slide rail rear lateral gap compensation device are arranged on the upper slide rail mounting frame in a corresponding manner to each other.

[0010] In a specific embodiment of this utility model, the upper slide rail fitting frame includes a fitting frame base plate, a fitting frame front folding plate, and a fitting frame rear folding plate. The fitting frame front folding plate is formed by folding the front side of the fitting frame base plate upwards along its length direction, and a positioning cavity for the upper and lower slide rail front lateral gap compensation device is formed at the center of the upper part of the front folding plate along its length direction. The fitting frame rear folding plate is formed by folding the rear side of the fitting frame base plate upwards along its length direction, and a positioning cavity for the upper and lower slide rail rear lateral gap compensation device is formed at the center of the upper part of the rear folding plate along its length direction. The upper and lower slide rail front and rear lateral gap compensation device positioning cavities are corresponding to each other front and back, and each is open at the top. The upper and lower slide rail front lateral gap compensation device is positioned on the fitting frame front folding plate at a position corresponding to the upper and lower slide rail front lateral gap compensation device positioning cavity, and the upper and lower slide rail rear lateral gap compensation device is positioned on the fitting frame rear folding plate at a position corresponding to the upper and lower slide rail rear lateral gap compensation device positioning cavity.

[0011] In another specific embodiment of this utility model, the upper and lower sliding rail front lateral clearance compensation device includes a front folding plate insert, a front roller support frame, and a front roller. The front folding plate insert is fitted with the front folding plate of the mating frame at a position corresponding to the positioning cavity of the upper and lower sliding rail front lateral clearance compensation device. The front roller support frame is inserted into the front folding plate insert. The front roller is horizontally mounted on the front roller support frame, and its left and right end faces are fitted with the front folding plate insert. The upper and lower sliding rail rear lateral clearance compensation device includes a rear folding plate insert, a rear roller support frame, and a rear roller. The rear folding plate insert is fitted with the rear folding plate of the mating frame at a position corresponding to the positioning cavity of the upper and lower sliding rail rear lateral clearance compensation device. The rear roller support frame is inserted into the rear folding plate insert. The rear roller is horizontally mounted on the rear roller support frame, and its left and right end faces are fitted with the rear folding plate insert.

[0012] In another specific embodiment of this utility model, the front folding plate insert includes an upper and lower sliding rail front lateral gap compensation plate, a left front insert foot, and a right front insert foot. The upper and lower sliding rail front lateral gap compensation plate is arched with the arch facing forward. The front side of the left front insert foot forms an integral structure with the left end of the upper and lower sliding rail front lateral gap compensation plate, and the left front insert foot forms a left front insert foot n-shaped cavity. The front side of the right front insert foot forms an integral structure with the right end of the upper and lower sliding rail front lateral gap compensation plate, and the right front insert foot forms a right front insert foot n-shaped cavity. The left and right front insert feet are connected by a pair of mating frames that are parallel to each other front and back and maintain mutual engagement. The thickness of the front folding plate is related to the front clearance of the front fitting foot connecting plate. The width of the left and right front fitting foot n-shaped cavities is adapted to the thickness of the front folding plate of the mating frame. The left and right front fitting foot n-shaped cavities are fitted with the front folding plate of the mating frame at the positions corresponding to the left and right ends of the positioning cavity of the front lateral clearance compensation device of the upper and lower slide rails, respectively. The front clearance is inserted into the front folding plate of the mating frame corresponding to the bottom of the positioning cavity of the front lateral clearance compensation device of the upper and lower slide rails. The front roller support frame includes a front insert plate and a front roller bed. The front insert plate is inserted between the front lateral clearance compensation plate of the upper and lower slide rails and the opposite sides of the left and right front fitting feet. The length of the front roller bed and the front insert plate is... The rear side in the degree direction forms an integral structure. The front roller is mounted horizontally on the front roller bed. The left end face of the front roller is in contact with the end face of the left front insert foot facing the right front insert foot, and the right end face of the front roller is in contact with the end face of the right front insert foot facing the left front insert foot. The rear folding plate insert includes an upper and lower slide rail rear lateral clearance compensation plate, a left rear insert foot, and a right rear insert foot. The upper and lower slide rail rear lateral clearance compensation plate is arched, and the arching direction of the arch is rearward. The rear side of the left rear insert foot forms an integral structure with the left end of the upper and lower slide rail rear lateral clearance compensation plate, and the left rear insert foot forms a left rear insert foot n-shaped insert cavity. The rear side of the right rear insert foot is in contact with the upper and lower slide rail rear lateral clearance compensation plate. The right end of the slide rail rear lateral clearance compensation plate forms an integral structure, and the right rear insert foot forms a right rear insert foot n-shaped cavity. The left and right rear insert feet are connected by a pair of rear insert foot connecting plates that are parallel to each other and maintain a rear gap between them equal to the thickness of the rear folding plate of the fitting frame. The width of the left and right rear insert foot n-shaped cavity is adapted to the thickness of the rear folding plate of the fitting frame. The left and right rear insert foot n-shaped cavity are fitted with the rear folding plate of the fitting frame at the positions corresponding to the left and right ends of the positioning cavity of the upper and lower slide rail rear lateral clearance compensation device, respectively. The rear gap is inserted into the rear folding plate of the fitting frame at the bottom of the positioning cavity of the upper and lower slide rail rear lateral clearance compensation device.The rear roller support frame includes a rear insert plate and a rear roller bed. The rear insert plate is inserted between the lateral clearance compensation plate behind the upper and lower slide rails and the opposite sides of the left and right rear insert feet. The rear roller bed and the rear side of the rear insert plate in the longitudinal direction form an integral structure. The rear rollers are horizontally mounted on the rear roller bed. The left end face of the rear roller is in contact with the end face of the left rear insert foot facing the right rear insert foot, and the right end face of the rear roller is in contact with the end face of the right rear insert foot facing the left rear insert foot.

[0013] In another specific embodiment of the present invention, a downwardly recessed semi-circular cavity is formed on the upward-facing side of the front roller bed, and a downwardly recessed semi-circular cavity is formed on the upward-facing side of the rear roller bed.

[0014] In another specific embodiment of this utility model, the front roller and the rear roller are elastic rollers; the elastic rollers are high-carbon chromium bearing steel rollers, high-strength nylon rollers, ethylene plastic rollers or elastic metal composite material rollers; the elastic metal composite material is aluminum-based composite material, nickel-based composite material, titanium-based composite material, particle-reinforced composite material or layered composite material.

[0015] Another objective of this utility model is achieved as follows: a car seat slide rail includes a slide rail that is fixed to the car's floor in use. The front and rear sidewalls of the slide rail are parallel to each other in the longitudinal direction, and the space between the front and rear sidewalls forms a slide rail cavity. The upper part of the slide rail cavity in the longitudinal direction forms a slide rail opening. A pair of inner folded edges, parallel to the front and rear sidewalls respectively, are folded towards the slide rail cavity on the upper part of the front and rear sidewalls in the longitudinal direction. Locking teeth and locking plate teeth are formed in the middle region of the pair of inner folded edges in the longitudinal direction. The groove, the locking teeth of the locking plate, and the locking tooth groove of the locking plate form a one-to-one positional relationship. The space between the inner fold of the lower slide rail and the front side wall and the inner side wall of the lower slide rail each constitutes a mating cavity for the outer fold of the upper slide rail. An upper slide rail has a pair of outer folds parallel to the front and rear side walls of the upper slide rail, respectively, folded towards each other in the lower part of the length direction of the front and rear side walls of the upper slide rail. The pair of outer folds of the upper slide rail are located in the mating cavity of the outer fold of the upper slide rail. The upper part of the upper slide rail protrudes from the opening of the lower slide rail in the length direction, and the left and right ends of the upper part of the upper slide rail are each fixed with a device for use in the operating state. The car seat's seat pan is fixed by a seat pan connecting nut seat. A left roller is provided at the left end of a pair of upper slide rail outer folded edges, with corresponding front and rear positions. Similarly, a right roller is provided at the right end of a pair of upper slide rail outer folded edges, with corresponding front and rear positions. The left and right rollers of the upper slide rail outer folded edges form a rolling pair with the bottom plate of the lower slide rail cavity. Locking teeth and locking grooves are formed in the middle region along the length of each pair of upper slide rail outer folded edges, with the locking teeth and locking grooves forming a one-to-one positional relationship. An upper and lower slide rail locking and unlocking mechanism is provided on the... The upper slide rail is located in the middle and engages or disengages with the locking tooth groove and locking tooth groove of the locking tooth plate. When engaged with both the locking tooth groove and locking tooth groove, the upper slide rail is locked to the lower slide rail. When the upper and lower slide rail locking and unlocking mechanisms disengage from the locking tooth groove, the upper slide rail is unlocked from the lower slide rail. The upper slide rail is characterized by having a gap-eliminating mechanism as described in claim 1 at the lower left and lower right ends of the upper slide rail. The gap-eliminating mechanism compensates for the gap between the cavity wall of the upper slide rail outer folded edge engagement cavity and the outer folded edge of the upper slide rail within the engagement cavity corresponding to the outer folded edge of the upper slide rail.

[0016] In a further specific embodiment of this utility model, a dust cover for preventing dust and debris from entering the lower rail cavity is fixed at both the left and right ends of the lower rail. Lower rail brackets are fixed at intervals along the length of the lower rail, and at least a pair of spaced-apart lower rail car floor plate fixing brackets are riveted to the bottom of the lower rail. Lower rail car floor plate fixing brackets have fixing bolt holes on their front and rear sides at the center. A through-hole is provided at the left end of the lower rail, to the right of the dust cover at the left end, and at the right end of the lower rail, to the left of the dust cover at the right end. The upper slide rail movement limit position stop pin of the lower slide rail cavity is limited at its front end and rear end by retaining springs; a roller mating cavity is opened at the left end and right end of each of the pair of upper slide rail outer folds of the upper slide rail; the mating frame base plate of the upper slide rail mating frame of the backlash elimination mechanism is welded and fixed to the bottom of the upper slide rail; the front roller mates with the roller mating cavity at the left and right ends of the front upper slide rail outer fold of the pair of upper slide rail outer folds; and the rear roller mates with the roller mating cavity at the left and right ends of the rear upper slide rail outer fold of the pair of upper slide rail outer folds.

[0017] In a further specific embodiment of this utility model, a drive post clearance hole communicating with the upper slide rail cavity is formed on the top wall of the upper slide rail at a position corresponding to the upper and lower slide rail locking and unlocking mechanism. A left hanger of the return spring is formed on the left side corresponding to the drive post clearance hole, and a right hanger of the return spring is formed on the right side corresponding to the drive post clearance hole. The upper and lower slide rail locking and unlocking mechanism includes a locking tooth plate, a locking tooth plate lifting drive post, a locking tooth plate lifting guide seat, a left return spring of the locking tooth plate, and a locking tooth plate. The right return spring has locking and unlocking teeth and locking tooth mating grooves on both the front and rear sides along the length of the locking plate. The locking and unlocking teeth and the locking tooth mating grooves are spaced apart. The locking and unlocking teeth engage or disengage with the locking tooth grooves and locking tooth slots. When the locking and unlocking teeth simultaneously engage with both the locking tooth grooves and locking tooth slots, the upper slide rail is locked to the lower slide rail. When disengaged, the upper slide rail is unlocked from the lower slide rail. A pair of locking tooth plate lifting guide posts are fixed longitudinally parallel to each other on the upward-facing side of the middle of the locking tooth plate. These two pairs of lifting guide posts, along with the lifting guide post holes at both ends of the locking tooth plate lifting guide seat, form a sliding pair. The lower end of the locking tooth plate lifting drive post is fixed to the upward-facing side of the middle of the locking tooth plate, while the upper end of the locking tooth plate lifting drive post extends from bottom to top through the locking tooth plate lifting guide seat and the drive post clearance hole, reaching above the upper slide rail for driving. The handle is used in conjunction with the locking tooth plate lifting guide. Each end of the locking tooth plate lifting guide has a locking tooth plate lifting guide fixing screw hole. The locking tooth plate lifting guide is fixed to the top of the upper slide rail cavity by the locking tooth plate lifting guide fixing screw at the position corresponding to the locking tooth plate lifting guide fixing screw hole. The upper end of the left return spring of the locking tooth plate is hung on the left hanging foot of the return spring, and the lower end is fixed to the left end of the locking tooth plate. The upper end of the right return spring of the locking tooth plate is hung on the right hanging foot of the return spring, and the lower end is fixed to the right end of the locking tooth plate.

[0018] Another objective of this invention is to provide a car seat having the car seat slide rails described above.

[0019] The technical solution provided by this utility model has the following technical effects: Since the backlash elimination mechanism consists of an upper slide rail fitting frame and identical front and rear lateral gap compensation devices for the upper and lower slide rails mounted on the upper slide rail fitting frame, it significantly improves strength, simplifies the structure, and demonstrates excellent integration of components, thus ensuring stable long-term use, comfortable operation, and reliable backlash elimination effect. It also helps reduce slide rail sliding resistance during use and avoids problems such as jamming during adjustment. The provided car seat slide rail can effectively eliminate the gap between the upper and lower slide rails, fully demonstrating the technical effects of the backlash elimination mechanism. The provided car seat can embody the advantages of a car seat slide rail equipped with a backlash elimination mechanism. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an embodiment of the backlash elimination mechanism of this utility model;

[0021] Figure 2 For equipped with Figure 1 The diagram shows a structural embodiment of the backlash elimination mechanism for a car seat slide rail.

[0022] Figure 3 for Figure 2 A schematic diagram of the upper and lower rails after assembly. Detailed Implementation

[0023] 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.

[0024] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on... Figure 1 or Figure 2 The location and state of the object are taken as examples, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0025] Please see Figure 1 The diagram shows an upper slide rail mounting frame 1; it also shows an upper and lower slide rail front lateral clearance compensation device 2 and an upper and lower slide rail rear lateral clearance compensation device 3, which are arranged on the aforementioned upper slide rail mounting frame 1 in a front-to-back correspondence with each other.

[0026] The aforementioned upper slide rail mounting frame 1 includes a mounting frame base plate 11, a mounting frame front folding plate 12, and a mounting frame rear folding plate 13. The mounting frame front folding plate 12 is formed by folding the front side of the mounting frame base plate 11 upwards along its length, and a positioning cavity 121 for the upper and lower slide rail front lateral clearance compensation device is formed at the upper center position of the upper part of the mounting frame front folding plate 12. The mounting frame rear folding plate 13 is formed by folding the rear side of the mounting frame base plate 11 upwards along its length, and a positioning cavity 121 for the upper and lower slide rail front lateral clearance compensation device is formed at the upper center position of the upper part of the mounting frame rear folding plate 13. The upper and lower slide rails have a rear lateral clearance compensation device positioning cavity 131. The upper and lower slide rails have front and rear lateral clearance compensation device positioning cavities 121 and 131 that correspond to each other and are each open at the top. The aforementioned upper and lower slide rails front lateral clearance compensation device 2 is positioned on the aforementioned front folding plate 12 of the aforementioned mating frame at the position corresponding to the upper and lower slide rails front lateral clearance compensation device positioning cavity 121, while the aforementioned upper and lower slide rails rear lateral clearance compensation device 3 is positioned on the aforementioned rear folding plate 13 of the aforementioned mating frame at the position corresponding to the upper and lower slide rails rear lateral clearance compensation device positioning cavity 131.

[0027] Depend on Figure 1 As shown, the cross-sectional shape of the aforementioned upper slide rail mounting frame 1 is U-shaped, and the positioning cavities 121 and 131 of the aforementioned upper and lower slide rail front and rear lateral gap compensation devices are U-shaped.

[0028] Please stay tuned. Figure 1 The aforementioned upper and lower slide rail front lateral clearance compensation device 2 includes a front folding plate insert 21, a front roller support frame 22, and a front roller 23. The front folding plate insert 21 is fitted with the aforementioned front folding plate 12 of the mating frame at a position corresponding to the positioning cavity 121 of the aforementioned upper and lower slide rail front lateral clearance compensation device. The front roller support frame 22 is inserted into the front folding plate insert 21. The front roller 23 is horizontally mounted on the front roller support frame 22, and the left and right end faces of the front roller 23 are fitted with the aforementioned front folding plate insert 21. The aforementioned upper and lower slide rail rear lateral clearance compensation device 3 includes a rear folding plate insert 31, a rear roller support frame 32, and a rear roller 33. The rear folding plate insert 31 is fitted with the aforementioned rear folding plate 13 of the mating frame at a position corresponding to the positioning cavity 131 of the aforementioned upper and lower slide rail rear lateral clearance compensation device. The rear roller support frame 32 is inserted into the rear folding plate insert 31. The rear roller 33 is horizontally mounted on the rear roller support frame 32, and the left and right end faces of the rear roller 33 are fitted with the aforementioned rear folding plate insert 31.

[0029] The aforementioned front folding plate insert 21 includes an upper and lower slide rail front lateral clearance compensation plate 211, a left front insert foot 212, and a right front insert foot 213. The upper and lower slide rail front lateral clearance compensation plate 211 is arched with the arch facing forward. The front side of the left front insert foot 212 is integrally formed with the left end of the upper and lower slide rail front lateral clearance compensation plate 211, and the left front insert foot 212 forms a left front insert foot n-shaped insert cavity 2121. The front side of the right front insert foot 213 is integral with the front side of the upper and lower slide rail. The right end of the gap compensation plate 211 forms an integral structure, and the right front insert 213 forms a right front insert n-shaped cavity 2131. The left and right front inserts 212 and 213 are connected by a pair of front insert connecting plates 214 that are parallel to each other and maintain a distance equal to the thickness of the front folding plate 12 of the fitting frame. The width of the left and right front insert n-shaped cavities 2121 and 2131 is adapted to the thickness of the front folding plate 12 of the fitting frame, and the left and right... The front-mounted n-shaped cavities 2121 and 2131 are fitted with the front folding plate 12 of the aforementioned mating frame at positions corresponding to the left and right ends of the positioning cavity 121 of the aforementioned upper and lower slide rail front lateral clearance compensation device, respectively. The aforementioned front clearance 2141 is inserted into the front folding plate 12 of the mating frame at the bottom of the positioning cavity 121 of the upper and lower slide rail front lateral clearance compensation device. The aforementioned front roller support frame 22 includes a front insert plate 221 and a front roller bed 222. The front insert plate 221 is inserted into the aforementioned upper and lower slide rail front lateral clearance. Between the compensation plate 211 and the opposite side of the aforementioned left front insert foot 212 and right front insert foot 213, the front roller bed 222 and the rear side of the front insert plate 221 in the longitudinal direction form an integral structure. The aforementioned front roller 23 is arranged in a horizontal position on the front roller bed 222. The left end face of the front roller 23 is in contact with the end face of the aforementioned left front insert foot 212 facing the aforementioned right front insert foot 213, while the right end face of the front roller 23 is in contact with the end face of the right front insert foot 213 facing the left front insert foot 212.

[0030] The aforementioned rear folding plate insert 31 includes an upper and lower sliding rail rear lateral clearance compensation plate 311, a left rear insert foot 312, and a right rear insert foot 313. The upper and lower sliding rail rear lateral clearance compensation plate 311 is arched, and the arching direction of the arch is rearward. The rear side of the left rear insert foot 312 is integrally formed with the left end of the upper and lower sliding rail rear lateral clearance compensation plate 311, and the left rear insert foot 312 forms a left rear insert foot n-shaped insert cavity 3121. The rear side of the right rear insert foot 313 is integrally formed with the upper and lower sliding rail rear lateral clearance compensation plate 311. The right end of the lateral clearance compensation plate 311 forms an integral structure, and the right rear insert 313 forms a right rear insert n-shaped cavity 3131. The left and right rear inserts 312 and 313 are connected by a pair of rear insert connecting plates 314 that are parallel to each other and maintain a rear clearance 3141 equal to the thickness of the rear folding plate 13 of the fitting frame. The width of the left and right rear insert n-shaped cavities 3121 and 3131 is adapted to the thickness of the rear folding plate 13 of the fitting frame, and the left and right... The rear-mounted n-shaped cavities 3121 and 3131 are fitted with the rear folding plate 13 of the aforementioned mating frame at positions corresponding to the left and right ends of the positioning cavity 131 of the rear lateral clearance compensation device of the upper and lower slide rails, respectively. The rear clearance 3141 is inserted into the rear folding plate 13 of the mating frame at the bottom of the positioning cavity 131 of the rear lateral clearance compensation device of the upper and lower slide rails. The rear roller support frame 32 includes a rear insert plate 321 and a rear roller bed 322. The rear insert plate 321 is inserted into the rear lateral clearance of the aforementioned upper and lower slide rails. Between the compensation plate 311 and the opposite side of the left rear insert foot 312 and the right rear insert foot 313, the rear roller bed 322 and the rear side of the rear insert plate 321 in the longitudinal direction form an integral structure. The rear roller 33 is arranged in a horizontal position on the rear roller bed 322. The left end face of the rear roller 33 is in contact with the end face of the left rear insert foot 312 facing the right rear insert foot 313, and the right end face of the rear roller 33 is in contact with the end face of the right rear insert foot 313 facing the left rear insert foot 312.

[0031] Preferably, a downwardly recessed semi-circular cavity 2221 is formed on the upward-facing side of the aforementioned front roller bed 222, which is conducive to the stable horizontal placement of the front roller 23, and a downwardly recessed semi-circular cavity 3221 is formed on the upward-facing side of the aforementioned rear roller bed 322, which is conducive to the stable horizontal placement of the rear roller 33.

[0032] In this embodiment, the aforementioned front roller 23 and rear roller 33 are elastic rollers; the aforementioned elastic rollers are made of high carbon chromium bearing steel, but high-strength nylon rollers, ethylene plastic rollers or elastic metal composite rollers can also be used; the aforementioned elastic metal composite material is preferably an aluminum-based composite material, but it can also be a nickel-based composite material, a titanium-based composite material, a particle-reinforced composite material or a layered composite material.

[0033] Please see Figure 2 and Figure 3 ,Should Figure 2 and Figure 3 The image shows a slide rail 5, specifically, a slide rail 5 with a [missing information - likely a number] on its left and right ends. Figure 1 The illustrated backlash-free automotive seat slide rail specifically shows a slide rail 4. According to technical knowledge, this slide rail 4 is fixed to the car's floor panel during use. The front and rear sidewalls of the slide rail 4 are parallel to each other in the longitudinal direction, and the space between the front and rear sidewalls forms a slide rail cavity 41. The upper part of the slide rail cavity 41 in the longitudinal direction forms a slide rail opening 411. A pair of inner folded edges 42, parallel to the front and rear sidewalls respectively, are folded towards the slide rail cavity 41 on the upper part of the front and rear sidewalls in the longitudinal direction. Figure 3 (As shown), in the middle region along the length of the inner folded edge 42 of the lower slide rail, there are locking teeth 421 and locking tooth grooves 422 of the locking plate. The locking teeth 421 and locking tooth grooves 422 are positioned alternately. The space between the inner folded edge 42 of the lower slide rail and the front and inner sidewalls of the lower slide rail are each configured as an outer folded edge mating cavity 423 of the upper slide rail. An upper slide rail 5 is shown. In the lower part along the length of the front and rear sidewalls of the upper slide rail 5, there are a pair of outer folded edges 51 of the upper slide rail, which are parallel to the front and rear sidewalls of the upper slide rail, respectively. The pair of outer folded edges 51 of the upper slide rail are located in the aforementioned outer folded edge mating cavity 423 of the upper slide rail. Figure 3As shown in the diagram, the upper part of the upper slide rail 5 extends beyond the aforementioned lower slide rail opening 411 along its length. A seat base connecting nut seat 52 for fixing the seat base of the car seat in use is fixed to the left and right ends of the upper part of the upper slide rail 5. A left upper slide rail outer edge roller 511 is provided at the left end of a pair of upper slide rail outer edges 51, with corresponding front and rear positions. Similarly, a right upper slide rail outer edge roller 512 is provided at the right end of a pair of upper slide rail outer edges 51, also with corresponding front and rear positions. The aforementioned corresponding left upper slide rail outer edge rollers 511 are preferably coaxially arranged, but can also be arranged with independent roller shafts. The same applies to the right upper slide rail outer edge rollers 512. The aforementioned left and right upper slide rail outer edge rollers 511 and 512, together with the bottom plate of the aforementioned lower slide rail cavity 41, form a... The rolling joint has locking teeth 513 and locking grooves 514 formed in the middle region of the outer flanges 51 of the upper slide rails along their length. The locking teeth 513 and locking grooves 514 are spaced apart from each other. An upper and lower slide rail locking and unlocking mechanism 6 is shown. This mechanism is located in the middle of the upper slide rail 5 and engages or disengages with the locking grooves 422 and 514. When engaged with both locking grooves 422 and 514, the upper slide rail 5 is locked to the lower slide rail 4. When the upper and lower slide rail locking and unlocking mechanism 6 disengages from the locking grooves 422, the upper slide rail 5 is unlocked from the lower slide rail 4. As can be seen from the foregoing description, the locking grooves 422 and 514 correspond to each other.

[0034] The feature is that: a [feature] is provided at the lower left end and the lower right end of the aforementioned upper slide rail 5. Figure 1 The aforementioned gap-eliminating mechanism of the structure shown compensates for the gap between the cavity wall of the aforementioned upper slide rail outer folded edge mating cavity 423 and the aforementioned upper slide rail outer folded edge 51 within the cavity corresponding to the aforementioned upper slide rail outer folded edge mating cavity 423 (gap compensation means "eliminating gap").

[0035] because Figure 1 The upper slide rail fitting frame 1 of the backlash elimination mechanism shown is U-shaped, and the width of the cavity of the U-shape is adapted to the width of the upper slide rail 5. Therefore, when the upper slide rail fitting frame 1 and the upper slide rail 5 are fitted together, they are preferably fixed by welding.

[0036] Please stay tuned. Figure 2 and Figure 3At the left and right ends of the aforementioned lower slide rail 4, a dust cover 43 is fixed with dust cover screws 431 to prevent dust from entering the aforementioned lower slide rail cavity 41. Preferably, lower slide rail brackets 44 are fixed at intervals along the length of the lower slide rail 4 by welding. At the bottom of the lower slide rail 4, a pair of spaced-apart lower slide rail car floor plate fixing brackets 45 are riveted with rivets 452. Lower slide rail car floor plate fixing brackets 45 have fixing bolt holes 451 on the front and rear sides of their middle sections. At the left end of the lower slide rail 4, to the right of the aforementioned dust cover 43, and at the right end of the lower slide rail 4, to the left of the aforementioned dust cover 43, an upper slide rail movement limit position passing through the aforementioned lower slide rail cavity 41 is provided. A stop pin 46 is provided, with its front and rear ends each limited by a retaining spring 461. A U-shaped roller mating cavity 515 is provided at the left and right ends of each pair of outer flanges 51 of the aforementioned upper slide rail 5. The base plate 11 of the aforementioned upper slide rail mating frame 1 of the aforementioned backlash elimination mechanism is welded and fixed to the bottom of the aforementioned upper slide rail 5. The front roller 23 of the backlash elimination mechanism's structural system mates with the roller mating cavities 515 at the left and right ends of the front outer flange of the pair of upper slide rail outer flanges 51, while the rear roller 33 of the aforementioned backlash elimination mechanism's structural system mates with the roller mating cavities 515 at the left and right ends of the rear outer flange of the pair of upper slide rail outer flanges 51. As can be seen from the foregoing description, this utility model will... Figure 1 The structure of the gap elimination mechanism shown, in which the base plate 11 of the upper slide rail mounting frame 1 is welded and fixed to the bottom of the upper slide rail 5, not only ensures the strength of the gap elimination mechanism itself, but also significantly improves the strength of the upper slide rail 5.

[0037] On the top wall of the aforementioned upper slide rail 5, at a position corresponding to the aforementioned upper and lower slide rail locking and unlocking mechanism 6, a drive post clearance hole 54 communicating with the upper slide rail cavity 53 of the upper slide rail 5 is provided. A left hanger 55a of the return spring is formed on the left side corresponding to the drive post clearance hole 54, and a right hanger 55b of the return spring is formed on the right side corresponding to the drive post clearance hole 54. The aforementioned upper and lower slide rail locking and unlocking mechanism 6 includes a locking tooth plate 61, a locking tooth plate lifting drive post 62, a locking tooth plate lifting guide seat 63, a left return spring 64 of the locking tooth plate, and a right return spring 65 of the locking tooth plate. On the front side of the locking tooth plate 61 in the length direction, a drive post 54 is provided. Each of the upper and lower slide rails has a locking / unlocking tooth 611 and a locking tooth engaging groove 612. The locking / unlocking tooth 611 and the locking tooth engaging groove 612 are spaced apart from each other. The locking / unlocking tooth 611 engages with or disengages from the aforementioned locking tooth groove 422 and locking tooth groove 514. When the locking / unlocking tooth 611 engages with both the aforementioned locking tooth groove 422 and locking tooth groove 514, the upper slide rail 5 is locked to the lower slide rail 4. When the locking / unlocking tooth 611 disengages from the locking tooth groove 422, the upper slide rail 5 is locked to the lower slide rail 4. 5 is in a state of being unlocked from the lower slide rail 4. A pair of locking plate lifting guide posts 613 are fixed longitudinally parallel to each other on the upward-facing side of the middle of the locking plate 61. These two pairs of lifting guide posts 613 and the lifting guide post holes 631 at both ends of the locking plate lifting guide seat 63 form a sliding pair. The lower end of the locking plate lifting drive post 62 is fixed to the upward-facing side of the middle of the locking plate 61, while the upper end of the locking plate lifting drive post 62 extends from bottom to top through the locking plate lifting guide seat 63 and the aforementioned drive post clearance hole 54, reaching above the aforementioned upper slide rail 5. A drive handle (not shown in the figure) is provided to cooperate with it (lower part). (Further explanation needed) A locking tooth plate lifting guide seat fixing screw hole 632 is provided at the upper part of each end of the locking tooth plate lifting guide seat 63. The locking tooth plate lifting guide seat 63 is fixed to the top of the upper slide rail 5 in the aforementioned upper slide rail cavity 53 by the locking tooth plate lifting guide seat fixing screw 6321 at the position corresponding to the locking tooth plate lifting guide seat fixing screw hole 632. The upper end of the locking tooth plate left return spring 64 is hung on the aforementioned return spring left hanging foot 55a, and the lower end is fixed to the left end of the locking tooth plate 61. The upper end of the locking tooth plate right return spring 65 is hung on the aforementioned return spring right hanging foot 55b, and the lower end is fixed to the right end of the locking tooth plate 61.

[0038] This utility model also relates to a device equipped with Figure 1 The backlash elimination mechanism shown refers to the car seat slide rail used in the car seat, that is, the car seat slide rail has... Figure 1 The backlash elimination mechanism shown.

[0039] The applicant needs to explain that: Figure 1 The backlash elimination mechanism shown is used in addition to... Figure 2In addition to the car seat slide rail with the structure shown, it can also be used for car seat slide rails with other structural forms.

[0040] The applicant describes the locking and unlocking process of the upper and lower sliding rails 5 and 4 by the upper and lower sliding rail locking and unlocking mechanism 6, when the user, i.e., the passenger, engages the locking and unlocking mechanism. Figure 2 When the handle mechanism (not shown) which falls within the scope of existing technology is operated, the handle mechanism applies downward pressure to the locking plate lifting drive column 62 by lever effect, causing the locking plate lifting drive column 62 to push the locking plate 61. Under the resistance of the left and right return springs 64 and 65 of the locking plate and under the guidance of a pair of locking plate lifting guide columns 613, the locking plate 61 moves downward, causing the locking unlocking teeth 611 of the locking plate to move downward accordingly and disengage from the locking tooth groove 422 of the locking plate. At this time, the upper and lower slide rails 5 and 4 are in an unlocked state. In this state, the passenger can move the car seat and the car seat basin forward or backward through the seat basin connecting nut seat 52 and the upper slide rail 5, taking the direction of the car as an example, until the car seat is adjusted to the desired position. After the car seat is adjusted to the desired position, the passenger releases the aforementioned handle mechanism. At this time, under the synchronous restoring force of the left and right return springs 64 and 65 of the aforementioned locking plate, the locking plate 61 is pulled upward, so that the locking and unlocking teeth 611 of the locking plate enter the locking tooth groove 422 of the locking plate and the locking tooth groove 514 of the locking plate corresponding to or nearly coinciding with the locking tooth groove 422, thereby locking the upper and lower rails 5 and 4.

[0041] 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. An anti-backlash mechanism, characterized by: The utility model provides a slide rail cooperation frame, upper and lower slide rail front side gap compensation device and upper and lower slide rail rear side gap compensation device, the upper and lower slide rail front side gap compensation device and the upper and lower slide rail rear side gap compensation device are set up on the upper slide rail cooperation frame in the state of corresponding to each other, the upper slide rail cooperation frame includes cooperation frame bottom plate, cooperation frame front flange and cooperation frame rear flange, cooperation frame front flange is constituted by the length direction's front side to the upper folding of cooperation frame bottom plate, and the length direction's upper central position of cooperation frame front flange constitutes upper and lower slide rail front side gap compensation device positioning cavity, cooperation frame rear flange is constituted by the length direction's rear side to the upper folding of cooperation frame bottom plate, and the length direction's upper central position of cooperation frame rear flange constitutes upper and lower slide rail rear side gap compensation device positioning cavity, and upper and lower slide rail front side gap compensation device positioning cavity, upper and lower slide rail rear side gap compensation device positioning cavity correspond to each other and are open in the upper part, the upper and lower slide rail front side gap compensation device in the position corresponding to upper and lower slide rail front side gap compensation device positioning cavity is positioned on cooperation frame front flange, and the upper and lower slide rail rear side gap compensation device in the position corresponding to upper and lower slide rail rear side gap compensation device positioning cavity is positioned on cooperation frame rear flange.

2. The backlash elimination mechanism of claim 1, wherein: The utility model discloses a slide rail cooperation frame, upper and lower slide rail front side gap compensation device and upper and lower slide rail rear side gap compensation device, the upper and lower slide rail front side gap compensation device and the upper and lower slide rail rear side gap compensation device are set up on the upper slide rail cooperation frame in the state of corresponding to each other, the upper slide rail cooperation frame includes cooperation frame bottom plate, cooperation frame front flange and cooperation frame rear flange, cooperation frame front flange is constituted by the length direction's front side to the upper folding of cooperation frame bottom plate, and the length direction's upper central position of cooperation frame front flange constitutes upper and lower slide rail front side gap compensation device positioning cavity, cooperation frame rear flange is constituted by the length direction's rear side to the upper folding of cooperation frame bottom plate, and the length direction's upper central position of cooperation frame rear flange constitutes upper and lower slide rail rear side gap compensation device positioning cavity, and upper and lower slide rail front side gap compensation device positioning cavity, upper and lower slide rail rear side gap compensation device positioning cavity correspond to each other and are open in the upper part, the upper and lower slide rail front side gap compensation device in the position corresponding to upper and lower slide rail front side gap compensation device positioning cavity is positioned on cooperation frame front flange, and the upper and lower slide rail rear side gap compensation device in the position corresponding to upper and lower slide rail rear side gap compensation device positioning cavity is positioned on cooperation frame rear flange.

3. An anti-backlash mechanism according to claim 2, wherein: The front folding plate embedding part (21) comprises a front side gap compensation plate (211) of upper and lower sliding rails, a left front embedding foot (212) and a right front embedding foot (213), the front side gap compensation plate (211) of upper and lower sliding rails is arched and the arch direction of the arch is towards the front, the front side of the left front embedding foot (212) and the left end of the front side gap compensation plate (211) of upper and lower sliding rails form an integral structure, and the left front embedding foot (212) is provided with a left front embedding foot n-shaped embedding cavity (2121), the front side of the right front embedding foot (213) and the right end of the front side gap compensation plate (211) of upper and lower sliding rails form an integral structure, and the right front embedding foot (213) is provided with a right front embedding foot n-shaped embedding cavity (2131), wherein the left front embedding foot (212) and the right front embedding foot (213) are connected by a front embedding foot connecting plate (214) which is parallel to each other and has a front gap (2141) with a thickness of the front folding plate (12) of the matching frame between them, the width of the left front embedding foot n-shaped embedding cavity (2121) and the right front embedding foot n-shaped embedding cavity (2131) is adapted to the thickness of the front folding plate (12) of the matching frame, and the left front embedding foot n-shaped embedding cavity (2121) and the right front embedding foot n-shaped embedding cavity (2131) are embedded with the front folding plate (12) of the matching frame at positions corresponding to the left end and the right end of the front side gap compensation device positioning cavity (121) of upper and lower sliding rails respectively, and the front gap (2141) is embedded with the front folding plate (12) of the matching frame corresponding to the bottom of the front side gap compensation device positioning cavity (121) of upper and lower sliding rails.The front roller support frame (22) comprises a front plug-in panel (221) and a front roller bed (222), the front plug-in panel (221) is plugged between the front side gap compensation panel (211) of the upper and lower slide rails and the opposite side of the left front fitting foot (212) and the right front fitting foot (213), the front roller bed (222) is integrated with the rear side of the length direction of the front plug-in panel (221), the front roller (23) is arranged on the front roller bed (222) in a lying state, the left end face of the front roller (23) is in contact with the end face of the left front fitting foot (212) facing the right front fitting foot (213), and the right end face of the front roller (23) is in contact with the end face of the right front fitting foot (213) facing the left front fitting foot (212), the rear folding plate embedding part (31) comprises an upper and lower slide rail rear side gap compensation panel (311), a left rear fitting foot (312) and a right rear fitting foot (313), the upper and lower slide rail rear side gap compensation panel (311) is arched and the arch direction of the arch is towards the rear, the rear side of the left rear fitting foot (312) is integrated with the left end of the upper and lower slide rail rear side gap compensation panel (311), and the left rear fitting foot (312) is provided with a left rear fitting foot N-shaped embedding cavity (3121), the rear side of the right rear fitting foot (313) is integrated with the right end of the upper and lower slide rail rear side gap compensation panel (311), and the right rear fitting foot (313) is provided with a right rear fitting foot N-shaped embedding cavity (3131), wherein the left rear fitting foot (312) and the right rear fitting foot (313) are connected by a rear fitting foot connecting plate (314) which is parallel to each other and has a rear gap (3141) between them, the width of the left rear fitting foot N-shaped embedding cavity (3121) and the right rear fitting foot N-shaped embedding cavity (3131) is adapted to the thickness of the fitting frame rear folding plate (13), and the left rear fitting foot N-shaped embedding cavity (3121) and the right rear fitting foot N-shaped embedding cavity (3131) are fitted with the fitting frame rear folding plate (13) at positions corresponding to the left end and the right end of the upper and lower slide rail rear side gap compensation device positioning cavity (131) respectively, and the rear gap (3141) is plugged and fitted with the fitting frame rear folding plate (13) corresponding to the bottom of the upper and lower slide rail rear side gap compensation device positioning cavity (131).The rear roller support frame (32) comprises a rear insertion panel (321) and a rear roller bed (322). The rear insertion panel (321) is inserted between the rear side gap compensation panel (311) of the upper and lower slide rails and the opposite side of the left rear fitting foot (312) and the right rear fitting foot (313). The rear side of the length direction of the rear insertion panel (321) and the rear roller bed (322) form an integrated structure. The rear roller (33) is arranged in a lying state on the rear roller bed (322). The left end face of the rear roller (33) is in contact with the end face of the left rear fitting foot (312) facing the right rear fitting foot (313), and the right end face of the rear roller (33) is in contact with the end face of the right rear fitting foot (313) facing the left rear fitting foot (312).

4. An anti-backlash mechanism according to claim 3, characterised in that: A front roller bed semicircular arc cavity (2221) is formed on the upper side of the length direction of the front roller bed (222), and a rear roller bed semicircular arc cavity (3221) is formed on the upper side of the length direction of the rear roller bed (322).

5. The backlash elimination mechanism of claim 3, wherein: The front roller (23) and the rear roller (33) are elastic rollers; the elastic roller is a high-carbon chromium bearing steel roller, a high-strength nylon roller, a vinyl plastic roller or an elastic metal composite material roller; the elastic metal composite material is an aluminum-based composite material, a nickel-based composite material, a titanium-based composite material, a particle reinforced composite material or a laminated composite material. 6.A car seat slide rail comprises a lower slide rail (4) fixed to the floor of a car in use, the front and rear side walls of the lower slide rail (4) are parallel to each other in the length direction, and the space between the front and rear side walls of the lower slide rail (4) forms a lower slide rail cavity (41), the upper part of the length direction of the lower slide rail cavity (41) forms a lower slide rail opening (411), the upper part of the length direction of the front and rear side walls of the lower slide rail (4) are folded towards the direction of the lower slide rail cavity (41), and a pair of lower slide rail inner folding edges (42) parallel to the front and rear side walls of the lower slide rail (4) are formed respectively, the middle part of the length direction of the pair of lower slide rail inner folding edges (42) forms a lock tooth plate lock tooth (421) and a lock tooth plate lock tooth groove (422), the lock tooth plate lock tooth (421) and the lock tooth plate lock tooth groove (422) are in a one-to-one position relationship, and the space between the lower slide rail inner folding edge (42) and the front and rear side walls of the lower slide rail (4) forms an upper slide rail outer folding edge fitting cavity (423); an upper slide rail (5), the lower part of the length direction of the front and rear side walls of the upper slide rail (5) is folded towards the direction of the front and rear side walls of the upper slide rail (5), and a pair of upper slide rail outer folding edges (51) parallel to the front and rear side walls of the upper slide rail (5) are formed respectively, the pair of upper slide rail outer folding edges (51) are located in the upper slide rail outer folding edge fitting cavity (423), the upper part of the length direction of the upper slide rail (5) protrudes from the lower slide rail opening (411), and the left and right ends of the upper part of the upper slide rail (5) are respectively fixed with a seat pan connecting nut seat (52) for fixing the seat pan of a car seat in use, the left end of the pair of upper slide rail outer folding edges (51) of the upper slide rail (5) and the corresponding front and rear positions form an upper slide rail outer folding edge left roller (511), and the right end of the pair of upper slide rail outer folding edges (51) and the corresponding front and rear positions form an upper slide rail outer folding edge right roller (512), the upper slide rail outer folding edge left roller (511), the upper slide rail outer folding edge right roller (512) and the bottom plate of the lower slide rail cavity (41) form a rolling pair, and the middle part of the length direction of the pair of upper slide rail outer folding edges (51) forms a lock tooth plate lock tooth (513) and a lock tooth plate lock tooth groove (514), the lock tooth plate lock tooth (513) and the lock tooth plate lock tooth groove (514) are in a one-to-one position relationship; an upper and lower slide rail locking and unlocking mechanism (6) is arranged in the middle part of the upper slide rail (5) and cooperates with or releases the cooperation with the lock tooth plate lock tooth groove (422) and the lock tooth plate lock tooth groove (514), when the upper and lower slide rail locking and unlocking mechanism (6) cooperates with the lock tooth plate lock tooth groove (422) and the lock tooth plate lock tooth groove (514) at the same time, the upper slide rail (5) is in a locked state with the lower slide rail (4), and when the upper and lower slide rail locking and unlocking mechanism (6) releases the cooperation with the lock tooth plate lock tooth groove (422), the upper slide rail (5) is in an unlocked state with the lower slide rail (4). An anti-clearance mechanism as claimed in claim 2 is arranged at the lower left end and the lower right end of the upper slide rail (5) to compensate for the clearance between the cavity wall of the upper slide rail outer folded edge fitting cavity (423) and the upper slide rail outer folded edge (51).

7. The automobile seat slide rail according to claim 6, characterized by: A dust cover (43) is fixed at the left end and the right end of the lower slide rail (4) to prevent dust from entering the lower slide rail cavity (41), a lower slide rail bracket (44) is fixed at intervals along the length direction of the lower slide rail (4), at least one pair of lower slide rail carriage bottom plate fixing frames (45) are riveted to the bottom of the lower slide rail (4) by rivets (452), lower slide rail carriage bottom plate fixing frame fixing bolt holes (451) are formed in the middle of the front and back sides of the lower slide rail carriage bottom plate fixing frame (45), an upper slide rail movement limit position stop pin (46) is arranged at the right side of the left end of the lower slide rail (4) and at the left side of the right end of the lower slide rail (4) to pass through the lower slide rail cavity (41), the front end and the rear end of the upper slide rail movement limit position stop pin (46) are defined by a snap spring (461), a roller fitting cavity (515) is formed at the left end and the right end of a pair of upper slide rail outer folded edges (51) of the upper slide rail (5), the fitting frame bottom plate (11) of the upper slide rail fitting frame (1) of the anti-clearance mechanism is welded and fixed to the bottom of the upper slide rail (5), the front roller (23) fits with the roller fitting cavities (515) at the left end and the right end of the front upper slide rail outer folded edge of the pair of upper slide rail outer folded edges (51), and the rear roller (33) fits with the roller fitting cavities (515) at the left end and the right end of the rear upper slide rail outer folded edge of the pair of upper slide rail outer folded edges (51).

8. The automobile seat slide rail according to claim 6, characterized by: On the top wall of the upper slide rail (5) and at the position corresponding to the upper and lower slide rail locking and unlocking mechanism (6), a driving column accommodation hole (54) is formed, which is communicated with the upper slide rail cavity (53) of the upper slide rail (5), and a reset spring left hanging leg (55a) is formed on the left side corresponding to the driving column accommodation hole (54), and a reset spring right hanging leg (55b) is formed on the right side corresponding to the driving column accommodation hole (54); the upper and lower slide rail locking and unlocking mechanism (6) comprises a locking tooth plate (61), a locking tooth plate lifting driving column (62), a locking tooth plate lifting guide seat (63), a locking tooth plate left reset spring (64) and a locking tooth plate right reset spring (65), and on the front side and the rear side of the length direction of the locking tooth plate (61), a locking tooth plate locking and unlocking tooth (611) and a locking tooth matching groove (612) are formed, the locking tooth plate locking and unlocking tooth (611) and the locking tooth matching groove (612) are distributed one by one, and the locking tooth plate locking and unlocking tooth (611) is matched or matched with the locking tooth plate locking tooth groove (422) and the locking tooth plate locking tooth groove (514), when the locking tooth plate locking and unlocking tooth (611) is matched with the locking tooth plate locking tooth groove (422) and the locking tooth plate locking tooth groove (514) at the same time, the upper slide rail (5) is in the state of being locked with the lower slide rail (4), and when the locking tooth plate locking and unlocking tooth (611) is matched with the locking tooth plate locking tooth groove (422), the upper slide rail (5) is in the state of being unlocked with the lower slide rail (4), a pair of locking tooth plate lifting guide columns (613) are fixed in the longitudinal parallel state in the middle of the locking tooth plate (61) towards the upper side, the pair of locking tooth plate lifting guide columns (613) and the lifting guide column holes (631) formed at both ends of the locking tooth plate lifting guide seat (63) form a sliding pair, the lower end of the locking tooth plate lifting driving column (62) is fixed with the middle of the locking tooth plate (61) towards the upper side, and the upper end of the locking tooth plate lifting driving column (62) extends to the upper side of the upper slide rail (5) for driving the handle to cooperate from bottom to top through the locking tooth plate lifting guide seat (63) and the driving column accommodation hole (54), a locking tooth plate lifting guide seat fixing screw hole (632) is formed on the upper part of both ends of the locking tooth plate lifting guide seat (63), the locking tooth plate lifting guide seat (63) is fixed in the upper slide rail cavity (53) with the top of the upper slide rail (5) by the locking tooth plate lifting guide seat fixing screw (6321) at the position corresponding to the locking tooth plate lifting guide seat fixing screw hole (632), the upper end of the locking tooth plate left reset spring (64) is hung on the reset spring left hanging leg (55a), and the lower end is fixed with the left end of the locking tooth plate (61), the upper end of the locking tooth plate right reset spring (65) is hung on the reset spring right hanging leg (55b), and the lower end is fixed with the right end of the locking tooth plate (61).

9. An automotive seat characterized by: The automobile seat slide rail has the advantages of the automobile seat slide rail as claimed in claim 6.

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