Automobile seat sliding rail with anti-deformation function and automobile seat thereof

Abstract

The utility model discloses an automobile seat sliding rail with an anti-deformation function and an automobile seat thereof. Comprising a lower sliding rail, an upper sliding rail left-right displacement driving mechanism arranged in a lower sliding rail cavity, an upper sliding rail, a front gap eliminating mechanism and a lower gap eliminating mechanism, wherein the upper sliding rail is movably matched with the lower sliding rail, and the middle of the upper sliding rail is fixed to the upper sliding rail left-right displacement driving mechanism; the front gap eliminating mechanism is used for enabling the upper sliding rail to be movably matched with the lower sliding rail and is arranged between the front portions of the upper sliding rail and the lower sliding rail; the anti-deformation sliding guide structure is characterized by further comprising an upper sliding rail anti-deformation sliding guide mechanism used for increasing the sliding rail contact area of the upper sliding rail, and the upper sliding rail anti-deformation sliding guide mechanism is arranged in a lower sliding rail cavity. The lower portion of the upper sliding rail is supported on the upper sliding rail anti-deformation sliding guide mechanism and forms a sliding pair with the upward side of the upper sliding rail anti-deformation sliding guide mechanism. The automobile seat sliding rail has the advantages that the situation that the upper sliding rail sinks and even deforms due to violent jolting in the automobile driving process can be avoided, the service life of the automobile seat sliding rail is guaranteed, and the automobile seat sliding rail has excellent adjusting precision reliability and position stability after adjustment.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and particularly relates to an automobile seat slide rail with an anti-deformation function, and also relates to the automobile seat thereof. Background Art

[0002] The aforementioned car seat slide rails are known as seat adjustment rails and are an essential component of fore-and-aft adjustable car seats. They not only secure the car seat, but also adjust it, impacting numerous factors, including passenger safety. The macroscopic structure of a car seat slide rail primarily consists of a lower rail (also known as an "outer rail"), an upper rail (also known as an "inner rail"), and a drive mechanism that drives the upper rail along the lower rail to move as needed (e.g., forward or backward) to achieve adjustment. Since the car seat's seat is secured to the upper rail via its seat basin, when the upper rail is driven forward or backward by the drive mechanism, it drives the seat basin, along with the car seat, to move accordingly.

[0003] As is known in the industry, the aforementioned lower rail is a static rail. Once installed, it is fixed to the vehicle floor (also known as the "carriage floor") and cannot be adjusted during use. The aforementioned upper rail, on the other hand, is a dynamic rail. Because it forms a sliding pair with the lower rail, it can be adjusted forward or backward as needed by the passenger.

[0004] There is no shortage of technical information about automobile seat slides in the published Chinese patent documents. A few examples include CN116022040B (a sliding mechanism for an automobile seat slide), CN103029600A (a structurally improved automobile seat slide), CN203974599U (an automobile seat slide), CN104108322B (an automobile seat slide), CN116039463A (an automobile seat slide locking structure), CN217892570U (a gap-eliminating device for a long vehicle seat slide), and CN115593282A (a long slide for an automobile seat with a good gap-eliminating effect), etc.

[0005] A common structural form for achieving automotive seat adjustment currently employs a ball bearing rack equipped with balls within the space between the longitudinally facing walls of the upper and lower slide rails. This allows the upper rail (i.e., the "inner rail") to slide relative to the lower rail (i.e., the "outer rail") under the influence of a power unit. The facing walls are the outer sidewalls of the upper rail and the inner sidewalls of the lower rail. The ball bearing rack equipped with balls is often referred to as a backlash elimination mechanism. The sliding of the upper rail is essentially achieved through this backlash elimination mechanism. A typical example of this structure can be found in the aforementioned CN203974599U. However, this structural form presents the following technical problems: Because the ball bearings are tangentially connected to the outer sidewalls of the upper rail and the inner sidewalls of the lower rail, stress is highly concentrated at the contact points, easily causing wear and fatigue damage to the aforementioned sidewalls. Under axial load, the ball bearings and the contact surface undergo elastic contact deformation, further exacerbating stress concentration. Although rolling friction between the ball bearings and the contact surface is less than sliding friction, friction can still significantly increase under heavy loads and / or poor lubrication. Due to contact stress concentration and friction, wear between the ball bearings and the contact surface increases with repeated adjustments, affecting transmission accuracy and service life, resulting in a relative lack of accuracy. If the upper rail is formed using a sliding bracket with rollers at the bottom and the lower rail to form a rolling pair, with the sliding bracket driving the upper rail and the car seat to which it is fixed, this structure often becomes relatively complex. A typical example is the "Sliding Mechanism for Car Seat Rails" recommended in CN218750424U.

[0006] As mentioned above, it is of positive significance to explore a car seat slide rail that can not only make up for the disadvantages of the structure similar to CN203974599U, but also eliminate the shortcomings of the structural design such as CN218750424U. The technical solution to be introduced below is produced in this context. Utility Model Content

[0007] The purpose of the present utility model is to provide a car seat slide rail with an anti-deformation function, which helps to increase the sliding contact area of ​​the lower part of the upper slide rail in the longitudinal direction, thereby avoiding the lower slide rail from being dented or even deformed due to bumps in the vehicle during driving, which causes the passenger to feel uncomfortable and insecure due to up and down jumping and / or moving back and forth, and is conducive to ensuring excellent adjustment accuracy and reliability during a long service life and maintaining stability in the adjusted position, and is beneficial to ensuring the simplicity of the structure, thereby facilitating manufacturing and assembly and reflecting economy.

[0008] Another task of the present invention is to provide a car seat, which can faithfully and comprehensively realize all the technical effects of the car seat slide rail with anti-deformation function.

[0009] The task of the utility model is accomplished in this way: a car seat slide rail with an anti-deformation function, comprising a lower rail, an upper slide rail left and right displacement driving mechanism arranged in the lower rail cavity of the lower rail, an upper slide rail that cooperates with the movement of the lower rail and is fixed to the upper slide rail left and right displacement driving mechanism in the middle part in the length direction, a front clearance elimination mechanism for making the upper slide rail cooperate with the movement of the lower rail and arranged between the front of the upper and lower rails in the length direction, and a rear clearance elimination mechanism arranged between the rear of the upper and lower rails in the length direction, characterized in that it also includes an upper slide rail anti-deformation sliding guide mechanism for increasing the slide rail contact area of ​​the upper slide rail, the upper slide rail anti-deformation sliding guide mechanism is arranged in the lower rail cavity, the lower part of the upper slide rail in the length direction is supported on the upper slide rail anti-deformation sliding guide mechanism and forms a sliding pair with the upper side of the upper slide rail anti-deformation sliding guide mechanism.

[0010] The cam is secured to the left of the chassis and has a slot for sliding the upper and lower guide rails together with the front edge of the chassis to allow the chassis to move relative to the left chassis. The cam is fixed to the chassis and the rear portion of the chassis is fixed to the chassis, and the rear portion of the chassis is fixed to the chassis, and the rear portion of the chassis is fixed to the chassis.

[0011] The rear end of the upper and lower parts ... The front side of the upper slide rail anti-deformation sliding guide mechanism constitutes a sliding pair, and the front side of the lower slide rail rear side wall front flange protruding into the groove of the bottom wall of the lower slide rail, which is opposite to the side of the lower slide rail rear side wall front flange protruding into the groove, and the rear side of the upper slide rail anti-deformation sliding guide mechanism fixed in the bracket fixing cavity constitutes a sliding pair; an upper slide rail left and right displacement driving mechanism yielding opening is provided in the middle of the length direction of the upper slide rail, and the upper part of the upper slide rail left and right displacement driving mechanism protrudes out of the upper surface of the upper slide rail at a position corresponding to the yield opening of the upper slide rail left and right displacement driving mechanism; the front gap eliminating mechanism is arranged between the front folding edge of the upper slide rail and the facing side of the inner wall of the front folding edge accommodating cavity of the upper slide rail, and the rear gap eliminating mechanism is arranged between the rear folding edge of the upper slide rail and the facing side of the inner wall of the rear folding edge accommodating cavity of the upper slide rail

[0012] and a right positioning flange insertion hole is provided on the upper slide rail and located on the left side of the upper slide rail displacement driving mechanism, and a right positioning flange insertion hole is provided on the right side of the upper slide rail displacement driving mechanism, and the upper slide rail is fixed to the upper part of the upper slide rail left and right displacement driving mechanism by the position corresponding to the screw left end support seat clearance hole and the screw right end support seat fixing screw hole; the upper slide rail anti-deformation sliding guide mechanism is fixed to the upper part of the upper slide rail left and right displacement driving mechanism by the left and right positioning flange insertion holes; the upper slide rail anti-deformation sliding guide mechanism is fixed to the card foot matching hole in the bracket fixing cavity.

[0013] In another specific embodiment of the present invention, the left and right displacement driving mechanism of the upper slide rail includes a left end support seat of the screw, a right end support seat of the screw, a worm gear box seat, a worm gear box and a worm gear box moving screw, the upper end of the left end support seat of the screw extends upward from the side of the bottom wall of the bracket fixing cavity facing away from the bracket fixing cavity at a position corresponding to the clearance hole of the left end support seat of the screw and is fixed with a screw sleeve, the lower end of the left end support seat of the screw is formed with an extended flange edge, and the surface of the extended flange edge facing upward is aligned with the bracket fixing cavity. The bottom wall of the frame cavity is in contact with the side of the bracket fixing cavity, wherein the left end support seat of the screw rod and the portion corresponding to the clearance hole of the left end support seat of the screw rod are tightly matched with the clearance hole of the left end support seat of the screw rod, and the right end support seat of the screw rod is supported in the bracket fixing cavity at a position corresponding to the fixing screw hole of the right end support seat of the screw rod and is fixed by the fixing screw of the right end support seat of the screw rod, and a matching threaded hole for the right end of the screw rod is provided at the upper end of the right end support seat of the screw rod, and a left fixed wing is formed on the left side of the upper part of the worm gear box seat, and on the side of the left fixed wing facing upward and corresponding to the The position of the left positioning flange insertion hole constitutes a left positioning flange, and the left positioning flange is inserted into the left positioning flange insertion hole and is welded to the upper slide rail. The upper right side of the worm gear box seat is formed with a right fixed wing, and a right positioning flange is formed on the side facing upward and at a position corresponding to the right positioning flange insertion hole. The right positioning flange is inserted into the right positioning flange insertion hole and is also welded to the upper slide rail. The worm gear box is fixed to the middle part of the worm gear box seat, and the upper part of the worm gear box is at the left and right positions corresponding to the upper slide rail. The position of the shift driving mechanism's yielding port protrudes from the upper surface of the upper slide rail, and the middle part of the worm gear box's moving screw cooperates with the worm gear box thread, so that the worm gear box and the upper slide rail move left or right along the worm gear box's moving screw, and the left end of the worm gear box's moving screw cooperates with the screw sleeve, and the left end of the worm gear box's moving screw extends to the left side of the screw's left end support seat and is limited by a limiting nut, and the right end of the worm gear box's moving screw is supported on the screw's right end support seat at a position corresponding to the matching threaded hole of the screw's right end.

[0014] In another specific embodiment of the present invention, the upper slide rail anti-deformation sliding guide mechanism includes a front sliding guide rod, a rear sliding guide rod, a sliding guide rod left connecting frame, a sliding guide rod right connecting frame and a sliding guide rod middle connecting frame. The front sliding guide rod and the rear sliding guide rod are parallel to each other front and back in the length direction. The left connecting frame of the sliding guide rod is welded and fixed between the left ends of the front and rear sliding guide rods facing downward, the right connecting frame of the sliding guide rod is welded and fixed between the right ends of the front and rear sliding guide rods facing downward, and the left connecting frame of the sliding guide rod and the sliding guide rod The right connecting frame is fixed with the said card foot matching hole, and the middle connecting frame of the sliding guide rod is welded and fixed between the middle side of the front and rear sliding guide rods facing downward and is limited by the bottom wall of the bracket fixing cavity of the bracket fixing cavity; the rear flange of the front side wall of the lower sliding rail protrudes into the groove and the side surface of the front sliding guide rod facing upward constitutes a sliding pair, and the front flange of the rear side wall of the lower sliding rail protrudes into the groove and the side surface of the rear sliding guide rod facing upward constitutes a sliding pair.

[0015] In a more specific embodiment of the present invention, an intermediate connecting frame boss limiting hole is provided on the bottom wall of the bracket fixing cavity of the bracket fixing cavity and at a position corresponding to the intermediate connecting frame of the sliding guide rod, and an intermediate connecting frame boss is fixed at the bottom of the intermediate connecting frame of the sliding guide rod and at a position corresponding to the intermediate connecting frame boss limiting hole, and the intermediate connecting frame boss is placed in the intermediate connecting frame boss limiting hole; a pair of left connecting frame clamping feet are extended on the right side of the left connecting frame of the sliding guide rod, and the pair of left connecting frame clamping feet are clamped with the pair of clamping foot matching holes located at the middle left end of the width direction of the bottom wall of the bracket fixing cavity, and a pair of right connecting frame clamping feet are extended on the right side of the right connecting frame of the sliding guide rod, and the pair of right connecting frame clamping feet are clamped with the pair of clamping foot matching holes located at the middle right end of the width direction of the bottom wall of the bracket fixing cavity.

[0016] In another specific embodiment of the present invention, a guide rod left end fixed connecting plate is welded and fixed between the left end portions of the front and rear sliding guide rods, and the guide rod left end fixed connecting plate is located on the left side of the sliding guide rod left connecting frame, and a guide rod right end fixed connecting plate is welded and fixed between the right end portions of the front and rear sliding guide rods, and the guide rod right end fixed connecting plate is located on the right side of the sliding guide rod right connecting frame.

[0017] In another specific embodiment of the present invention, the surface of the front sliding guide rod facing upwards and the side of the rear flange of the front side wall of the lower slide rail that is opposite to the side of the rear flange of the front side wall of the lower slide rail that is opposite to the side of the rear flange of the front side wall of the lower slide rail that is opposite to the side of the rear flange of the rear side wall of the lower slide rail that is opposite to the side of the rear flange of the rear side wall of the lower slide rail that is opposite to the side of the rear flange of the rear side wall of the lower slide rail that is opposite to the side of the rear sliding guide rod sliding surface is matched, and the front sliding guide rod sliding surface and the rear sliding guide rod sliding surface are arc The bottom wall of the rear flange of the front side wall of the lower slide rail extends into the groove, and the bottom wall has a front concave cavity of the bottom wall at a position corresponding to the sliding surface of the front sliding guide rod, and the bottom wall front concave cavity and the bottom wall rear concave cavity are concave arc-shaped cavities and respectively form sliding pairs with the sliding surface of the front sliding guide rod and the sliding surface of the rear sliding guide rod.

[0018] Another task of the present invention is accomplished by providing a car seat equipped with the car seat slide rail with anti-deformation function.

[0019] The invention also provides a method for preventing the lower portion of the upper track from being swung back and forth, so that the lower portion of the upper track can be prevented from being swung back and forth by the upper track when the vehicle is in a state of being moved forward and backward, thereby preventing the lower track from being swung back and forth and causing discomfort to the passengers and a sense of security. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the left side after assembly;

[0022] Figure 3 for Figure 1 and Figure 2The schematic diagram of the upper slide rail anti-deformation sliding guide mechanism shown is observed after being flipped 180°. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical essence and beneficial effects of the present invention, a detailed description will be given below in the form of embodiments. However, the description of the embodiments does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0024] In the following description, all concepts related to direction or orientation such as up, down, left, right, front and back are based on the current Figure 1 The position state is used as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0025] See Figure 1 and Figure 2 , showing a lower slide rail 1 which is fixed to the vehicle floor in the use state, either directly or indirectly and in any fixing manner, but is ultimately fixed to the vehicle floor (usually directly fixed to the vehicle floor is the most common method), an upper slide rail left-right displacement driving mechanism 2 arranged in the lower slide rail cavity 11 of the lower slide rail 1, an upper slide rail 3 which is matched with the lower slide rail 1 for movement and is fixed to the upper slide rail left-right displacement driving mechanism 2 in the middle of the length direction, a front anti-backlash mechanism 4 for making the upper slide rail 3 match the lower slide rail 1 for movement and is arranged between the front of the upper and lower slide rails 3 and 1 in the length direction, and a rear anti-backlash mechanism 5 which is arranged between the rear of the upper and lower slide rails 3 and 1 in the length direction.

[0026] As the technical key points of the technical solution provided by the present invention, the structural system of the automobile seat slide rail with anti-deformation function of the present invention also includes an upper slide rail anti-deformation sliding guide mechanism 6 for increasing the slide rail contact area of ​​the upper slide rail 3. The upper slide rail anti-deformation sliding guide mechanism 6 is arranged in the aforementioned lower slide rail cavity 11, and the lower part of the aforementioned upper slide rail 3 in the longitudinal direction is supported on the upper slide rail anti-deformation sliding guide mechanism 6 and forms a sliding pair with the upper slide rail anti-deformation sliding guide mechanism 6 facing upward.

[0027] From the above description, it can be known that the automobile seat slide rail with anti-deformation function described in the present invention refers to the anti-deformation of the upper slide rail 3, that is, enhancing the anti-deformation ability of the upper slide rail 3, because the existing technology, for example, is not limited to the patents mentioned by the applicant in the background technology column above, which only rely on the front and rear anti-backlash mechanisms 4 and 5 to realize the dynamic sliding adjustment of the upper slide rail 3 relative to the static lower slide rail 1. Since the back side of the seat of the automobile seat, that is, the downward side, is fixed to the upper slide rail 3, when the upper slide rail 3 slides left and right as needed, the entire seat together with the backrest also slides accordingly.

[0028] The applicant needs to explain that: the above mentioned upper slide rail 3 slides left or right as needed, that is, slides left or right as needed based on Figure 1 However, when the upper slide rail 3 is installed on a vehicle, according to common knowledge, it slides forward or backward.

[0029] Furthermore, the applicant deems it necessary to clarify that car seat slides should be provided in pairs. Although this application only provides one side of a pair of car seat slides (i.e., one set) for each car seat, the structures of the pair are identical and thus will not confuse those skilled in the art. For further information, please refer to Chinese Patent Application Nos. 202211044758.6 and 202210897640.1, etc.

[0030] See you next time Figure 1 and Figure 2 The aforementioned lower rail cavity 11 is formed on the upper side of the aforementioned lower rail 1 and passes through from the left end to the right end in the length direction of the lower rail 1. The lower rail cavity 11 includes a bracket fixing cavity 111, an upper rail front folding accommodating cavity 112, an upper rail rear folding accommodating cavity 113 and an upper rail moving clearance groove 114. The bracket fixing cavity 111 is located in the middle of the lower rail 1. The upper rail front folding accommodating cavity 112 is formed by folding the lower rail front side wall 12 in the length direction of the lower rail 1 toward the bracket fixing cavity 11. The upper rail rear folding accommodating cavity 113 is formed by folding the lower rail rear side wall 13 in the length direction of the lower rail 1 also toward the bracket fixing cavity. The lower rail front side wall 12 is formed by folding and unfolding in the direction of the lower rail rear side wall 13 and corresponding to the upper rail front folding accommodating cavity 112, wherein the lower rail front side wall 12 is formed with a lower rail front side wall rear flange 121 folded and unfolded in the direction of the lower rail rear side wall 13, and the lower rail rear side wall 13 is formed with a lower rail rear side wall front flange 131 folded and unfolded in the direction of the lower rail front side wall 12 and corresponding to the lower rail front side wall rear flange 121, the space between the lower rail front side wall rear flange 121 and the lower rail rear side wall front flange 131 is formed as the upper rail moving clearance groove 114 for making the aforementioned bracket fixing cavity 111 communicate with the outside world, according to the above description and combined with Figure 1 and Figure 2It can be seen that the space between the rear flange 121 of the front side wall of the lower slide rail and the opposite side of the front side wall 12 of the lower slide rail constitutes the aforementioned upper slide rail front folding accommodating cavity 112. Similarly, the space between the front flange 131 of the rear side wall of the lower slide rail and the opposite side of the rear side wall 13 of the lower slide rail constitutes the aforementioned upper slide rail rear folding accommodating cavity 113; the aforementioned upper slide rail left and right displacement driving mechanism 2 and the upper slide rail anti-deformation sliding guide mechanism 6 are fixed in the aforementioned bracket fixing cavity 111; the length direction of the aforementioned upper slide rail 3 The front side of the upper rail 3 is movably accommodated in the upper rail front folding accommodating cavity 112, and the rear side is movably accommodated in the upper rail rear folding accommodating cavity 113, and the middle portion of the upper rail 3 in the longitudinal direction is fixed to the upper rail left-right displacement driving mechanism 2 in a state where it protrudes from the upper surface of the lower rail 1 through the upper rail moving clearance groove 114; the front clearance eliminating mechanism 4 is arranged between the front side of the upper rail 3 and the inner wall 1121 of the upper rail front folding accommodating cavity 112 of the upper rail front folding accommodating cavity ( Figure 2 The aforementioned rear clearance elimination mechanism 5 is arranged on the rear side of the aforementioned upper rail 3 and the inner wall 1131 of the upper rail rear folding accommodating cavity 113 of the upper rail rear folding accommodating cavity ( Figure 2 between the display).

[0031] See you next time Figure 1 and Figure 2 The front lower portion of the upper rail 3 in the longitudinal direction is formed with an upper rail front fold 31. A lower rail front side wall rear flange insertion groove 311 is formed between the upper rail front fold 31 and the lower front side surface of the upper rail 3. The lower rail front side wall rear flange 121 is inserted into the lower rail front side wall rear flange insertion groove 311 ( Figure 2 As shown, an upper rail rear side fold 32 is formed at the lower rear part in the longitudinal direction of the upper rail 3, and a lower rail rear side wall front flange insertion groove 321 is formed between the upper rail rear side fold 32 and the lower rear side surface of the upper rail 3, and the aforementioned lower rail rear side wall front flange 131 is inserted into the lower rail rear side wall front flange insertion groove 321 ( Figure 2 The bottom wall 3111 of the front side wall of the lower rail with the rear flange protruding into the groove 311 of the lower rail is opposite to the side of the rear flange protruding into the groove 311 of the lower rail, and the front side of the upper rail anti-deformation sliding guide mechanism 6 fixed in the bracket fixing cavity 111 of the lower rail cavity 11 of the aforementioned lower rail 1 constitutes a sliding pair, and the bottom wall 3211 of the front side wall of the lower rail with the front flange protruding into the groove 321 of the lower rail is opposite to the side of the front flange protruding into the groove 321 of the lower rail, and the rear side of the upper rail anti-deformation sliding guide mechanism 6 fixed in the aforementioned bracket fixing cavity 111 constitutes a sliding pair; an upper rail left and right displacement driving mechanism yielding opening 33 ( Figure 2As shown in the figure), the upper part of the aforementioned upper slide rail left-right displacement driving mechanism 2 protrudes from the upper surface of the upper slide rail 3 at a position corresponding to the yield opening 33 of the aforementioned upper slide rail left-right displacement driving mechanism; the aforementioned front gap eliminating mechanism 4 is arranged between the aforementioned upper slide rail front side fold 31 and the opposite side of the upper slide rail front fold accommodating cavity inner wall 1121, and the aforementioned rear gap eliminating mechanism 5 is arranged between the aforementioned upper slide rail rear side fold 32 and the opposite side of the upper slide rail rear fold accommodating cavity inner wall 1131.

[0032] Since the specific structure and function of the front and rear clearance eliminating mechanisms 4 and 5 mentioned above are all existing technologies, they are composed of a ball rack and balls arranged on the ball rack, and can be referred to but not limited to the mentioned Chinese patents such as CN203974599U, the applicant will not elaborate on them.

[0033] In order to prevent the front clearance eliminating mechanism 4 composed of the front ball retainer 41 and the front balls 42 spaced apart on the front ball retainer 41 from running out, a front clearance eliminating mechanism stopper 312 is formed at the positions corresponding to the left and right end slots of the rear flange protruding into the groove 311 of the front side wall of the aforementioned lower slide rail. Similarly, in order to prevent the rear clearance eliminating mechanism 5 composed of the rear ball retainer 51 and the rear balls 52 spaced apart on the rear ball retainer 51 from running out, a rear clearance eliminating mechanism stopper 322 is formed at the positions corresponding to the left and right end slots of the front flange protruding into the groove 321 of the rear side wall of the aforementioned lower slide rail. Figure 1 and Figure 2 According to the diagram and professional common sense, the function of the front and rear balls 42 and 52 of the structural system of the front and rear clearance eliminating mechanisms 4 and 5 is to respectively form a sliding fit with the front and rear side wall folds 31 and 32 of the upper slide rail 3.

[0034] Please see the key Figure 1, on the bottom wall of the bracket fixing cavity 111 of the lower rail cavity 11 of the aforementioned lower rail 1 and at the left end, a screw left end support seat clearance hole 1111 is opened, and a screw right end support seat fixing screw hole 1112 is opened at the right end, and a pair of card foot matching holes 1113 are opened at the left and right ends of the middle part of the width direction of the bottom wall of the aforementioned bracket fixing cavity; on the aforementioned upper rail 3 and at the left side of the clearance opening 33 of the aforementioned upper rail left and right displacement driving mechanism, a left positioning flange insertion hole 34a is opened, and at the left side of the upper rail left and right displacement driving mechanism, a left positioning flange insertion hole 34a is opened. A right positioning flange insertion hole 34b is provided at the right side of the structure yielding opening 33. The aforementioned upper slide rail left-right displacement driving mechanism 2 is located in the aforementioned bracket fixing cavity 111 at a position corresponding to the aforementioned screw left end support seat yielding hole 1111 and the screw right end support seat fixing screw hole 1112. The aforementioned upper slide rail 3 is fixed to the upper part of the aforementioned upper slide rail left-right displacement driving mechanism 2 through the aforementioned left and right positioning flange insertion holes 34a and 34b; the aforementioned upper slide rail anti-deformation sliding guide mechanism 6 is fixed to the aforementioned card foot matching hole 1113 in the aforementioned bracket fixing cavity 111.

[0035] Depend on Figure 1As shown, the aforementioned upper slide rail left-right displacement driving mechanism 2 includes a screw left end support seat 21, a screw right end support seat 22, a worm gear box seat 23, a worm gear box 24 and a worm gear box moving screw 25. The upper end of the screw left end support seat 21 extends upward from the side of the aforementioned bracket fixing cavity facing away from the aforementioned bracket fixing cavity 111 at a position corresponding to the aforementioned screw left end support seat clearance hole 1111 and is fixed with a screw sleeve 211. The lower end of the screw left end support seat 21 is formed with an extended flange edge 212, and the surface of the extended flange edge 212 facing upward is aligned with the bottom wall of the bracket cavity facing away from the bracket fixing cavity 111. One side is in contact, wherein the left end support seat 21 of the screw rod is tightly matched with the corresponding portion of the aforementioned left end support seat clearance hole 1111 (i.e., "tight fit") with the left end support seat clearance hole 1111 of the screw rod, and the right end support seat 22 of the screw rod is supported in the aforementioned bracket fixing cavity 111 at a position corresponding to the aforementioned right end support seat fixing screw hole 1112 of the screw rod and is fixed by the right end support seat fixing screw 222 of the screw rod, and a right end matching threaded hole 221 of the screw rod is provided at the upper end of the right end support seat 22 of the screw rod, and a left fixed wing 231 is formed on the upper left side of the worm gear box seat 23, and on the side of the left fixed wing 231 facing upward and corresponding to the aforementioned left positioning The position of the flange insertion hole 34a constitutes a left positioning flange 2311, and the left positioning flange 2311 probes into the aforementioned left positioning flange insertion hole 34a and is welded to the aforementioned upper slide rail 3. The upper right side of the worm gear box seat 23 is formed with a right fixed wing 232, and a right positioning flange 2321 is formed on the side facing upward and at a position corresponding to the aforementioned right positioning flange insertion hole 34b. The right positioning flange 2321 probes into the aforementioned right positioning flange insertion hole 34b and is also welded to the aforementioned upper slide rail 3. The worm gear box 24 is fixed to the middle of the worm gear box seat 23, and the upper part of the worm gear box 24 is at the position corresponding to the front The position of the yielding opening 33 of the upper slide rail left-right displacement driving mechanism protrudes from the upper surface of the aforementioned upper slide rail 3, and the middle part of the worm gear box moving screw 25 is threadedly engaged with the worm gear box 24, so that the worm gear box 24 and the upper slide rail 3 move left or right along the worm gear box moving screw 25, and the left end of the worm gear box moving screw 25 is engaged with the aforementioned screw sleeve 211, and the left end of the worm gear box moving screw 25 extends to the left side of the aforementioned screw left end support seat 21 and is limited by the limiting nut, and the right end of the worm gear box moving screw 25 is supported on the aforementioned screw right end support seat 22 at a position corresponding to the aforementioned screw right end engaging threaded hole 221.

[0036] See Figure 3 And combined Figure 1 and Figure 2The upper slide rail anti-deformation sliding guide mechanism 6 includes a front sliding guide rod 61, a rear sliding guide rod 62, a sliding guide rod left connecting frame 63, a sliding guide rod right connecting frame 64 and a sliding guide rod middle connecting frame 65. The front sliding guide rod 61 and the rear sliding guide rod 62 are parallel to each other in the length direction. The sliding guide rod left connecting frame 63 is welded and fixed between the left ends of the front and rear sliding guide rods 61 and 62 facing downward. The sliding guide rod right connecting frame 64 is welded and fixed between the right ends of the front and rear sliding guide rods 61 and 62 facing downward. The sliding guide rod left connecting frame 63 and the sliding guide rod right connecting frame 64 are each connected to the aforementioned The card foot fitting hole 1113 is fixed by snapping, and the middle connecting frame 65 of the sliding guide rod is welded and fixed between the downward side of the middle part of the front and rear sliding guide rods 61 and 62 and is limited by the bottom wall of the bracket fixing cavity 111 of the aforementioned bracket fixing cavity; the side of the rear flange of the front side wall of the aforementioned lower sliding rail protruding into the groove bottom wall 3111 facing away from the rear flange of the front side wall of the aforementioned lower sliding rail protruding into the groove 311 and the side surface of the aforementioned front sliding guide rod 61 facing upward constitute a sliding pair, and the side of the front flange of the rear side wall of the aforementioned lower sliding rail protruding into the groove bottom wall 3211 facing away from the front flange of the rear side wall of the aforementioned lower sliding rail protruding into the groove 321 and the side surface of the aforementioned rear sliding guide rod 62 facing upward constitute a sliding pair.

[0037] An intermediate connecting frame boss limiting hole 1114 is provided on the bottom wall of the bracket fixing cavity 111 and at a position corresponding to the intermediate connecting frame 65 of the sliding guide rod, and an intermediate connecting frame boss 651 is fixed at the bottom of the intermediate connecting frame 65 of the sliding guide rod and at a position corresponding to the intermediate connecting frame boss limiting hole 1114, and the intermediate connecting frame boss 651 is placed in the intermediate connecting frame boss limiting hole 1114; a pair of left connecting frame clamping feet 631 is extended on the right side of the left connecting frame 63 of the sliding guide rod, and the pair of left connecting frame clamping feet 631 are engaged with the pair of clamping foot matching holes 1113 located at the middle left end of the width direction of the bottom wall of the bracket fixing cavity; a pair of right connecting frame clamping feet 641 is extended on the right side of the right connecting frame 64 of the sliding guide rod, and the pair of right connecting frame clamping feet 641 are engaged with the pair of clamping foot matching holes 1113 located at the middle right end of the width direction of the bottom wall of the bracket fixing cavity.

[0038] Preferably, a guide rod left end fixed connecting plate 66 is welded and fixed between the left ends of the aforementioned front and rear sliding guide rods 61 and 62, and the guide rod left end fixed connecting plate 66 is located on the left side of the aforementioned sliding guide rod left connecting frame 63, and a guide rod right end fixed connecting plate 67 is welded and fixed between the right ends of the front and rear sliding guide rods 61 and 62, and the guide rod right end fixed connecting plate 67 is located on the right side of the aforementioned sliding guide rod right connecting frame 64.

[0039] Depend on Figure 2As shown, the surface of the front sliding guide rod 61 facing upwards and cooperating with the bottom wall 3111 of the front side wall of the lower slide rail and the side facing away from the rear flange of the front side wall of the lower slide rail and the side facing away from the rear flange of the front side wall of the lower slide rail and the side facing away from the rear flange of the rear ... The bottom wall 3111 of the rear flange of the front side wall of the sliding rail is opposite to the side of the rear flange of the front side wall of the lower sliding rail that extends into the groove 311 and has a bottom wall front concave cavity 3112 at a position corresponding to the sliding surface 611 of the aforementioned front sliding guide rod. The bottom wall 3211 of the front flange of the rear side wall of the lower sliding rail that extends into the groove is opposite to the side of the front flange of the rear side wall of the lower sliding rail that extends into the groove 321 and has a bottom wall rear concave cavity 3212 at a position corresponding to the sliding surface 621 of the aforementioned rear sliding guide rod. The bottom wall front concave cavity 3112 and the bottom wall rear concave cavity 3212 are concave arc-shaped cavities and respectively form sliding pairs with the aforementioned front sliding guide rod sliding surface 611 and the rear sliding guide rod sliding surface 621.

[0040] As can be seen from the above, because the front and rear concave bottom walls 3112 and 3212 respectively form a mortise-shaped (i.e., spherical) joint-effect sliding fit with the front and rear sliding guide rod sliding surfaces 611 and 621, respectively, the mating area between the bottom of the upper rail 3 and the upper rail anti-deformation sliding guide mechanism 6 is effectively increased. A more substantial benefit is that the upper rail anti-deformation sliding guide mechanism 6 alleviates the stress concentration problem in the front and rear clearance-eliminating mechanisms 4 and 5. Without the upper rail anti-deformation sliding guide mechanism 6, and if debris such as sand and debris intrudes into the lower rail cavity 11, the lower rail 1 could easily become concave (depressed) or even deformed on the side that slidably fits with the front and rear clearance-eliminating mechanisms 4 and 5, leading to the technical problems described above by the applicant. Therefore, the technical solution provided by the present utility model is undoubtedly superior.

[0041] As mentioned above, in actual use, the present invention comprises a pair of synchronously operated electric power mechanisms, such as a motor with forward and reverse rotation functions, which, through a linkage shaft, drive the worm 241 of the worm gear box 24 of the present invention. The worm 241 then drives the worm wheel (via external threads formed on the outer ring, i.e., the outer wall, of the worm wheel). Because the aforementioned worm gear box moving screw 25 engages with the threads (internal threads) on the worm wheel hole wall, the worm drives the worm wheel, causing the entire worm gear box 24, along with the seat secured to the upper rail 3 and the seat secured to the upper rail 3, to move along the worm gear box moving screw 25. Since the connection relationship between the motor and the aforementioned worm belongs to the prior art, for example, reference can be made to structural forms disclosed in Chinese patent applications No. 202011597739.7, 202211044758.6, 202210897640.1, 202420854798.6, etc., the applicant has only made the above brief description.

[0042] The utility model also provides a car seat which is not specifically shown in the figures. The car seat is equipped with the car seat slide rail with the anti-deformation function.

[0043] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A car seat slide rail with an anti-deformation function, comprising a lower slide rail (1), an upper slide rail left-right displacement driving mechanism (2) arranged in a lower slide rail cavity (11) of the lower slide rail (1), an upper slide rail (3) that is movably matched with the lower slide rail (1) and fixed to the upper slide rail left-right displacement driving mechanism (2) in the middle of the length direction, a front clearance eliminating mechanism (4) for making the upper slide rail (3) movably matched with the lower slide rail (1) and arranged between the front of the upper and lower slide rails (3, 1) in the length direction, and a rear clearance eliminating mechanism (5) arranged between the rear of the upper and lower slide rails (3, 1) in the length direction, characterized in that: It also includes an upper slide rail anti-deformation sliding guide mechanism (6) for increasing the slide rail contact area of ​​the upper slide rail (3), the upper slide rail anti-deformation sliding guide mechanism (6) is arranged in the lower slide rail cavity (11), the lower part of the upper slide rail (3) in the longitudinal direction is supported on the upper slide rail anti-deformation sliding guide mechanism (6) and forms a sliding pair with the upper side of the upper slide rail anti-deformation sliding guide mechanism (6).

2. The anti-deformation automobile seat slide rail according to claim 1, characterized in that: The lower rail cavity (11) is formed on the upper side of the lower rail (1) and passes through from the left end to the right end in the length direction of the lower rail (1). The lower rail cavity (11) includes a bracket fixing cavity (111), an upper rail front folding accommodating cavity (112), an upper rail rear folding accommodating cavity (113) and an upper rail movable clearance groove (114). The bracket fixing cavity (111) is located in the middle of the lower rail (1). The upper rail front folding accommodating cavity (112) is formed by folding the lower rail front side wall (12) in the length direction of the lower rail (1) toward the bracket fixing cavity (111). The upper slide rail rear folding edge accommodating cavity (113) is formed by the lower slide rail rear side wall (13) in the length direction of the lower slide rail (1) being folded and unfolded in the direction of the bracket fixing cavity (111) and corresponding to the upper slide rail front folding edge accommodating cavity (112), wherein the lower slide rail front side wall (12) is formed with a lower slide rail front side wall rear flange (121) folded and unfolded in the direction of the lower slide rail rear side wall (13), and the lower slide rail rear side wall (13) is formed with a lower slide rail rear side wall front flange (121) folded and unfolded in the direction of the lower slide rail front side wall (12) and corresponding to the lower slide rail front side wall rear flange (121). 131), the space between the rear flange (121) of the front side wall of the lower slide rail and the front flange (131) of the rear side wall of the lower slide rail is formed as the upper slide rail movable clearance groove (114) for making the bracket fixing cavity (111) communicate with the outside world; the upper slide rail left and right displacement driving mechanism (2) and the upper slide rail anti-deformation sliding guide mechanism (6) are fixed in the bracket fixing cavity (111); the front side of the upper slide rail (3) in the longitudinal direction is movably accommodated in the upper slide rail front folding accommodating cavity (112), and the rear side is movably accommodated in the upper slide rail rear folding accommodating cavity (113) , and the middle part of the upper slide rail (3) in the longitudinal direction is fixed to the upper slide rail left-right displacement driving mechanism (2) in a state where it protrudes from the upper surface of the lower slide rail (1) through the upper slide rail moving clearance groove (114); the front clearance eliminating mechanism (4) is arranged between the front side of the upper slide rail (3) and the upper slide rail front folding accommodating cavity inner wall (1121) of the upper slide rail front folding accommodating cavity (112); the rear clearance eliminating mechanism (5) is arranged between the rear side of the upper slide rail (3) and the upper slide rail rear folding accommodating cavity inner wall (1131) of the upper slide rail rear folding accommodating cavity (113).

3. The anti-deformation automobile seat slide rail according to claim 2, characterized in that: An upper rail front fold (31) is formed at the lower front portion of the upper rail (3) in the longitudinal direction, and a lower rail front side wall rear flange insertion groove (311) is formed between the upper rail front fold (31) and the lower front side of the upper rail (3), and the lower rail front side wall rear flange (121) is inserted into the lower rail front side wall rear flange insertion groove (311). An upper rail rear fold (32) is formed at the lower rear portion of the upper rail (3) in the longitudinal direction, and the upper rail rear fold (32) is interlocked with the upper rail rear fold. A lower rail rear side wall front flange protruding groove (321) is formed between the lower rear side surfaces of the upper rail (3), the lower rail rear side wall front flange (131) protrudes into the lower rail rear side wall front flange protruding groove (321), and the lower rail front side wall rear flange protruding groove bottom wall (3111) of the lower rail front side wall rear flange protruding groove (311) is opposite to the lower rail front side wall rear flange protruding groove (311) and is fixed in the bracket fixing cavity (111) of the lower rail cavity (11) of the lower rail (1). The front side of the upper slide rail anti-deformation sliding guide mechanism (6) constitutes a sliding pair, and the side of the lower slide rail rear side wall front flange protruding into the groove (321) of the lower slide rail rear side wall front flange protruding into the groove (321) facing away from the lower slide rail rear side wall front flange protruding into the groove (321) and the rear side of the upper slide rail anti-deformation sliding guide mechanism (6) fixed in the bracket fixing cavity (111) constitute a sliding pair; an upper slide rail left and right displacement drive mechanism yielding opening (33) is provided in the middle of the length direction of the upper slide rail (3). The upper portion of the upper slide rail left-right displacement driving mechanism (2) protrudes from the upper surface of the upper slide rail (3) at a position corresponding to the yielding opening (33) of the upper slide rail left-right displacement driving mechanism; the front gap eliminating mechanism (4) is arranged between the front folding edge (31) of the upper slide rail and the opposite side of the inner wall (1121) of the upper slide rail front folding edge accommodating cavity; the rear gap eliminating mechanism (5) is arranged between the rear folding edge (32) of the upper slide rail and the opposite side of the inner wall (1131) of the upper slide rail rear folding edge accommodating cavity.

4. The anti-deformation automobile seat slide rail according to claim 3, characterized in that: A screw left end support seat clearance hole (1111) is provided on the bottom wall of the bracket fixing cavity (111) of the lower rail cavity (11) of the lower rail (1) and is located at the left end, and a screw right end support seat fixing screw hole (1112) is provided at the right end, and a pair of card foot matching holes (1113) are provided at the left and right ends of the middle part of the bottom wall of the bracket fixing cavity in the width direction; a left positioning flange insertion hole (34a) is provided on the upper rail (3) and is located at the left side of the upper rail left and right displacement drive mechanism clearance opening (33), and a left positioning flange insertion hole (34b) is provided at the left side of the upper rail left and right displacement drive mechanism clearance opening ( A right positioning flange insertion hole (34b) is provided at the right side of the upper slide rail, and the upper slide rail left-right displacement driving mechanism (2) is fixed in the bracket fixing cavity (111) at a position corresponding to the left end support seat concession hole (1111) of the screw rod and the right end support seat fixing screw hole (1112). The upper slide rail (3) is fixed to the upper part of the upper slide rail left-right displacement driving mechanism (2) through the left and right positioning flange insertion holes (34a, 34b); the upper slide rail anti-deformation sliding guide mechanism (6) is fixed in the bracket fixing cavity (111) with the card foot matching hole (1113).

5. The anti-deformation automobile seat slide rail according to claim 4, characterized in that: The upper slide rail left-right displacement driving mechanism (2) comprises a screw left end support seat (21), a screw right end support seat (22), a worm gear box seat (23), a worm gear box (24) and a worm gear box moving screw (25); the upper end of the screw left end support seat (21) extends upward from the side of the bracket fixing cavity (111) facing away from the bracket fixing cavity (111) at a position corresponding to the screw left end support seat clearance hole (1111) and is fixed with a screw sleeve (211); the lower end of the screw left end support seat (21) is formed with an extended flange edge (212); the surface of the extended flange edge (212) facing upward is aligned with the bracket cavity bottom wall facing away from the bracket fixing cavity (111). The left end support seat (21) of the screw rod is in contact with the side of the screw rod, wherein the portion corresponding to the left end support seat clearance hole (1111) of the screw rod is tightly matched with the left end support seat clearance hole (1111), the right end support seat (22) of the screw rod is supported in the bracket fixing cavity (111) at a position corresponding to the screw right end support seat fixing screw hole (1112) and is fixed by the screw right support seat fixing screw (222), the upper end of the screw right end support seat (22) is provided with a screw right end matching threaded hole (221), the upper left side of the worm gear box seat (23) is formed with a left fixed wing (231), on the side of the left fixed wing (231) facing upward and corresponding to the left positioning flange insertion hole (34a) ) position forms a left positioning flange (2311), the left positioning flange (2311) penetrates into the left positioning flange insertion hole (34a) and is welded to the upper slide rail (3), the upper right side of the worm gear box seat (23) forms a right fixed wing (232), the right fixed wing (232) is formed on the side facing upward and at a position corresponding to the right positioning flange insertion hole (34b), the right positioning flange (2321) penetrates into the right positioning flange insertion hole (34b) and is also welded to the upper slide rail (3), the worm gear box (24) is fixed to the middle of the worm gear box seat (23), and the upper part of the worm gear box (24) is at the position corresponding to the upper slide rail (3). The position of the left-right displacement driving mechanism of the rail protrudes from the upper surface of the upper slide rail (3), and the middle part of the worm gear box moving screw (25) is threadedly matched with the worm gear box (24), so that the worm gear box (24) and the upper slide rail (3) move left or right along the worm gear box moving screw (25), and the left end of the worm gear box moving screw (25) is matched with the screw sleeve (211). The left end of the worm gear box moving screw (25) extends to the left side of the screw left end support seat (21) and is limited by a limiting nut. The right end of the worm gear box moving screw (25) is supported on the screw right end support seat (22) at a position corresponding to the screw right end matching threaded hole (221).

6. The anti-deformation automobile seat slide rail according to claim 4, characterized in that: The upper slide rail anti-deformation sliding guide mechanism (6) comprises a front sliding guide rod (61), a rear sliding guide rod (62), a sliding guide rod left connecting frame (63), a sliding guide rod right connecting frame (64) and a sliding guide rod middle connecting frame (65), wherein the front sliding guide rod (61) and the rear sliding guide rod (62) are parallel to each other in the longitudinal direction, the sliding guide rod left connecting frame (63) is welded and fixed between the left ends of the front and rear sliding guide rods (61, 62) facing downward, the sliding guide rod right connecting frame (64) is welded and fixed between the right ends of the front and rear sliding guide rods (61, 62) facing downward, and the sliding guide rod left connecting frame (63) and the sliding guide rod right connecting frame (64) are each The intermediate connecting frame (65) of the sliding guide rod is fixed with the said card foot matching hole (1113), and is welded and fixed between the middle parts of the front and rear sliding guide rods (61, 62) facing downwards and is limited by the bracket fixing cavity bottom wall of the bracket fixing cavity (111); the side of the rear flange protruding into the groove bottom wall (3111) of the front side wall of the lower slide rail facing away from the rear flange protruding into the groove (311) of the front side wall of the lower slide rail and the side surface facing upwards of the front sliding guide rod (61) form a sliding pair, and the side of the front flange protruding into the groove bottom wall (3211) of the rear side wall of the lower slide rail facing away from the front flange protruding into the groove (321) of the rear side wall of the lower slide rail and the side surface facing upwards of the rear sliding guide rod (62) form a sliding pair.

7. The anti-deformation automobile seat slide rail according to claim 6, characterized in that: An intermediate connecting frame boss limiting hole (1114) is provided on the bottom wall of the bracket fixing cavity (111) and at a position corresponding to the intermediate connecting frame (65) of the sliding guide rod. An intermediate connecting frame boss (651) is fixed at the bottom of the intermediate connecting frame (65) of the sliding guide rod and at a position corresponding to the intermediate connecting frame boss limiting hole (1114). The intermediate connecting frame boss (651) is placed in the intermediate connecting frame boss limiting hole (1114). A pair of left connecting frame clamping feet (631) extends from the right side of the connecting frame (63), and the pair of left connecting frame clamping feet (631) are clamped with the pair of clamping foot matching holes (1113) located at the left end of the middle part of the width direction of the bottom wall of the bracket fixing cavity. A pair of right connecting frame clamping feet (641) extends from the right side of the sliding guide rod right connecting frame (64), and the pair of right connecting frame clamping feet (641) are clamped with the pair of clamping foot matching holes (1113) located at the right end of the middle part of the width direction of the bottom wall of the bracket fixing cavity.

8. The anti-deformation automobile seat slide rail according to claim 6 or 7, characterized in that: A guide rod left end fixed connecting plate (66) is welded and fixed between the left ends of the front and rear sliding guide rods (61, 62), and the guide rod left end fixed connecting plate (66) is located on the left side of the sliding guide rod left connecting frame (63), while a guide rod right end fixed connecting plate (67) is welded and fixed between the right ends of the front and rear sliding guide rods (61, 62), and the guide rod right end fixed connecting plate (67) is located on the right side of the sliding guide rod right connecting frame (64).

9. The anti-deformation automobile seat slide rail according to claim 6, characterized in that: The surface of the front sliding guide rod (61) facing upwards and cooperating with the side of the rear flange of the front side wall of the lower rail protruding into the groove bottom wall (3111) facing away from the rear flange of the front side wall of the lower rail protruding into the groove (311) constitutes a front sliding guide rod sliding surface (611); the surface of the rear sliding guide rod (62) facing upwards and cooperating with the side of the front flange of the rear side wall of the lower rail protruding into the groove bottom wall (3211) facing away from the front flange of the rear side wall of the lower rail protruding into the groove (321) constitutes a rear sliding guide rod sliding surface (621); the front sliding guide rod sliding surface (611) and the rear sliding guide rod sliding surface (621) are arc surfaces; the rear flange of the front side wall of the lower rail protruding into the groove bottom wall (3111) is opposite to the side of the rear flange of the front side wall of the lower sliding rail and is provided with a bottom wall front concave cavity (3112) at a position corresponding to the sliding surface (611) of the front sliding guide rod. The bottom wall (3211) of the rear side wall of the lower sliding rail and is opposite to the side of the front flange of the rear side wall of the lower sliding rail and is provided with a bottom wall rear concave cavity (3212) at a position corresponding to the sliding surface (621) of the rear sliding guide rod. The bottom wall front concave cavity (3112) and the bottom wall rear concave cavity (3212) are concave arc-shaped cavities and respectively form sliding pairs with the sliding surface (611) of the front sliding guide rod and the sliding surface (621) of the rear sliding guide rod.

10. A car seat, characterized in that: The automobile seat slide rail with the anti-deformation function as claimed in claim 1 is installed.

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