Locking mechanism for a seat slide rail

Abstract

This utility model relates to the field of automotive seat technology, specifically to a locking mechanism for automotive seat slide rails. It includes a bottom rack and two side racks within the slide rail, a central groove and a bottom through groove connected within the seat legs, and a locking assembly for locking the seat legs. The locking assembly includes a vertical insert block slidably disposed within the bottom through groove and engaging with the bottom rack, a support frame, a horizontal insert block slidably sleeved outside the vertical insert block with at least two rollers, and a horizontal insert block that is inserted and connected to horizontal through holes on two vertical surfaces within the bottom through groove. This utility model uses two movable frames located between two sliders, the vertical insert block, and the support frame to form a rhomboid support. This allows control of the extension and retraction of a telescopic cylinder to lower the rollers and support the seat, or to raise and retract the rollers. This ensures that the rollers are only subjected to force when adjusting the seat position, preventing deformation due to prolonged continuous heavy pressure and ensuring smooth seat adjustment, thus extending the rollers' lifespan.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a locking mechanism for automotive seat slide rails. Background Technology

[0002] The sliding rail locking mechanism is a crucial component for adjusting the fore-and-aft position of car seats. The structure and operation of the sliding rail and car seat are as follows: the sliding rail is fixed inside the car cabin, and the bottom end of the seat leg slides within the sliding rail. The seat leg is equipped with rollers to reduce frictional resistance during movement. The locking mechanism is located between the seat leg and the sliding rail. When the seat needs to be adjusted fore-and-aft, the locking mechanism is unlocked, and then the seat is slid back and forth, causing the seat leg to slide axially along the sliding rail. Once the seat leg has slid to the desired position within the sliding rail, the locking mechanism is engaged to lock the seat leg securely within the sliding rail.

[0003] When a car seat is being moved, adjusted, or kept stationary, the rollers located between the seat legs and the sliding rails bear the total weight of the seat and the items placed on it. Over time, the connection between the rollers and the seat legs can deform due to gravity and impact, affecting the smoothness of the seat's movement. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a locking mechanism for automotive seat slide rails to solve the problem that the connection between the roller and the seat support leg is prone to deformation due to gravity and impact, which affects the smoothness of seat movement.

[0005] To achieve the above objectives, this utility model provides a locking mechanism for automotive seat slide rails, including a bottom rack and two side racks disposed within the slide rail.

[0006] A central groove and a bottom through groove are connected inside the seat leg.

[0007] A locking assembly for locking the position of the seat legs, the locking assembly including a vertical insert block that is slidably disposed in a bottom through groove and engages with a bottom rack.

[0008] The support frame is slidably fitted onto the outside of the vertical insert block and has at least two rollers on it.

[0009] A horizontal insert block that is connected to the horizontal through holes on two vertical surfaces located in the bottom through groove.

[0010] An adjustment section is located between two opposing horizontal and vertical insert blocks and the support frame.

[0011] When unlocked, the adjustment unit drives the horizontal and vertical insert blocks to separate from the side rack and bottom rack respectively, while also causing the rollers to support the seat legs.

[0012] When locked, the adjusting part drives the roller to retract and causes the horizontal and vertical insert blocks to engage with the side rack and bottom rack, respectively.

[0013] Preferably, the two side racks are respectively fixed on two vertical surfaces parallel to the axial direction inside the slide rail, and multiple teeth on the side racks are distributed side by side in the vertical direction.

[0014] Preferably, the bottom rack is fixedly disposed at the bottom inside the slide rail, and several teeth on the bottom rack are arranged side by side along the axial direction of the slide rail.

[0015] Preferably, the end face of the horizontal insert block near the slide rail is a toothed surface, and the bottom of the vertical insert block is also a toothed surface.

[0016] Preferably, the transverse through holes are located on the vertical surface of the bottom through groove near the vertical inner wall of the slide rail, and the transverse through holes correspond one-to-one in the width direction of the slide rail.

[0017] Preferably, the adjustment part includes two horizontal bars fixed in parallel within the bottom groove and two sliders slidably sleeved on the horizontal bars, and a telescopic cylinder for pushing the two coaxial sliders closer or further apart. One side of the horizontal insertion block is fixed on the slider. A movable frame is provided between the vertical surface of the slider near the vertical insertion block and the vertical insertion block and the support frame. Two adjacent movable frames together form a rhomboid support.

[0018] Preferably, the movable frame includes two connecting arms that are vertically and parallelly hinged to the slider, and the free ends of the two connecting arms are respectively hinged to the vertical insert block and the support frame.

[0019] Preferably, the horizontal insert block and the crossbar are staggered in the horizontal radial direction of the crossbar, and the horizontal insert block is located between the slider and the side rack.

[0020] The beneficial effects of this utility model are:

[0021] This invention controls the telescopic cylinder to retract laterally, pulling two sliders and two horizontal inserts closer together, causing the horizontal inserts to separate from the side rack. Simultaneously, two movable frames are connected between the two sliders, the vertical insert, and the support frame, forming a rhomboid support. This reduces the lateral width of the rhomboid support and increases its vertical height, causing the support frame to move down and lift the vertical insert. This allows the rollers to support the seat when it is unlocked and retract when it is not. This ensures that the rollers are only subjected to gravity compression when the seat position needs to be adjusted, preventing deformation caused by prolonged continuous pressure and ensuring smooth seat adjustment, thus extending the rollers' lifespan. Furthermore, the vertical inserts support the seat and engage with the bottom rack, while the horizontal inserts engage with the side rack laterally, locking the seat's freedom of movement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0024] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0025] Figure 3 for Figure 2 The main view;

[0026] Figure 4 This is a three-dimensional illustration of the present invention. Figure 3 ;

[0027] Figure 5 This is a three-dimensional illustration of the present invention. Figure 4 .

[0028] The diagram is marked as follows:

[0029] 1. Middle groove; 2. Side rack; 3. Bottom rack; 4. Locking assembly; 41. Vertical insert block; 42. Adjustment part; 421. Horizontal bar; 422. Slider; 423. Telescopic cylinder; 424. Movable frame; 43. Support frame; 44. Roller; 45. Horizontal insert block; 46. Horizontal through hole; 5. Bottom through groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] like Figures 1 to 5 As shown, a locking mechanism for a car seat slide rail includes a bottom rack 3 and two side racks 2 disposed within the slide rail.

[0033] A central groove 1 and a bottom through groove 5 are connected inside the seat leg, with the central groove 1 located at the top of the bottom through groove 5.

[0034] Locking assembly 4 for locking the position of the seat support leg includes a vertical insert 41 that is slidably disposed in the bottom through groove 5 and engages with the bottom rack 3.

[0035] The support frame 43 is slidably sleeved on the outside of the vertical insert block 41, and has at least two rollers 44. The cross-section of the support frame 43 is U-shaped and located at the bottom of the outside of the vertical insert block 41. The rollers 44 are located on two opposite vertical surfaces on the support frame 43, and the rollers 44 are also located on both sides of the bottom rack 3. This allows the rollers 44 to roll in the adjustment direction when the seat is adjusted forward and backward, and also avoids interference between the bottom rack 3 and the rollers 44.

[0036] A horizontal insertion block 45 is inserted and connected to the horizontal through holes 46 on the two vertical surfaces of the bottom through groove 5.

[0037] An adjustment part 42 is provided between two opposing horizontal inserts 45 and vertical inserts 41 and support frame 43.

[0038] When unlocked, the adjustment unit 42 drives the horizontal insertion block 45 and the vertical insertion block 41 to separate from the side rack 2 and the bottom rack 3 respectively, and at the same time causes the roller 44 to support the seat legs.

[0039] When locked, the adjustment unit 42 drives the roller 44 to retract and causes the horizontal insert block 45 and the vertical insert block 41 to mesh with the side rack 2 and the bottom rack 3, respectively.

[0040] This design allows the roller 44 to move down synchronously with the support frame 43 and lift the seat leg after the seat leg is unlocked, facilitating the adjustment of the seat's fore-and-aft position. After the seat's fore-and-aft position is adjusted, the roller 44 is retracted and the seat leg is locked simultaneously, preventing the roller 44 from deforming due to prolonged exposure to high vertical pressure, which could affect the smoothness of the seat's fore-and-aft movement adjustment.

[0041] like Figures 1 to 5 As shown, the two side racks 2 are fixedly mounted on two vertical surfaces parallel to the axial direction inside the slide rail, and multiple teeth on the side racks 2 are distributed side by side in the vertical direction.

[0042] The bottom rack 3 is fixedly installed at the bottom inside the slide rail, and several teeth on the bottom rack 3 are distributed side by side along the axial direction of the slide rail.

[0043] The end face of the horizontal insert 45 near the slide rail is a toothed surface, and the bottom of the vertical insert 41 is also a toothed surface.

[0044] This design allows the vertical insert 41 to engage with the bottom rack 3, thus restricting the seat leg's freedom in the slide rail axis. Combined with the engagement of the horizontal insert 45 with the side rack 2, this restricts the seat leg's freedom in the vertical direction and in the horizontal direction perpendicular to the slide rail axis, improving the seat leg locking effect.

[0045] like Figures 2 to 5 As shown, the transverse through holes 46 are located on the vertical surface of the bottom through groove 5 near the vertical inner wall of the slide rail, and the transverse through holes 46 correspond one-to-one in the width direction of the slide rail. This design ensures that when the roller 44 supports the seat under the drive of the adjustment part 42, the force is even, avoiding the problem of jamming between the vertical insert block 41 and the support frame 43 due to uneven force.

[0046] like Figure 4 and Figure 5 As shown, the adjustment part 42 includes two horizontal bars 421 fixed in parallel within the bottom groove 5 and two sliders 422 slidably sleeved on the horizontal bars 421. A telescopic cylinder 423 is used to push the two coaxial sliders 422 closer to or further away from each other. One side of the horizontal insertion block 45 is fixed on the slider 422. A movable frame 424 is provided between the vertical surface of the slider 422 near the vertical insertion block 41 and the vertical insertion block 41 and the support frame 43. Two adjacent movable frames 424 enclose each other to form a rhomboid support.

[0047] The movable frame 424 includes two connecting arms that are vertically and side by side hinged to the slider 422. The free ends of the two connecting arms are respectively hinged to the vertical insert block 41 and the support frame 43.

[0048] The horizontal insert block 45 and the horizontal bar 421 are staggered in the horizontal radial direction of the horizontal bar 421, and the horizontal insert block 45 is located between the slider 422 and the side rack 2.

[0049] This design allows the vertical insert 41 and the support frame 43 to be located at two vertically opposite movable points on the rhomboid bracket, and the two opposite sliders 422 to be located at two horizontally opposite movable points on the rhomboid bracket. This enables the two horizontal inserts 45 to move in opposite directions laterally, and simultaneously enables the vertical insert 41 and the support frame 43 to move in opposite directions vertically. As a result, the locking or unlocking action of the seat leg is performed at the same time as the retraction or extension action of the roller 44, thus improving the adjustment efficiency.

[0050] Working principle: Before seat position adjustment, the telescopic cylinder 423 retracts and simultaneously pulls the two sliders 422 and the horizontal insert block 45 at both ends closer together. This causes the two horizontally opposite intersections on the rhomboid bracket to move closer together and the two vertically opposite intersections to move further apart. This synchronously pushes the vertical insert block 41 and the support frame 43 to rise and fall respectively until the roller 44 on the support frame 43 contacts the bottom of the slide rail and lifts the seat legs. At this time, the horizontal insert block 45 separates from the side rack 2, and the vertical insert block 41 separates from the bottom rack 3, releasing the locking state of the seat legs. This allows the seat legs to slide axially along the slide rail to adjust their position. After seat position adjustment is completed... The telescopic cylinder 423 extends and simultaneously pushes the two sliders 422 and the horizontal insert block 45 at both ends away from each other, so that the two horizontally opposite intersections on the rhomboid bracket move away from each other simultaneously, and the two vertically opposite intersections on the rhomboid bracket move closer to each other simultaneously. This achieves the synchronous pushing of the vertical insert block 41 and the support frame 43 to descend and rise respectively, until the vertical insert block 41 engages with the bottom rack 3 and supports the seat leg. At this time, the horizontal insert block 45 engages with the side rack 2, and the support frame 43 drives the roller 44 to rise and retract. In this way, the roller 44 will only bear the squeezing force when the seat position is adjusted, which improves the protection effect of the roller 44, avoids the roller 44 being in a squeezed state for a long time, and extends its service life.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0052] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A locking mechanism for an automobile seat slide rail, comprising a bottom rack (3) and two side racks (2) disposed within the slide rail, characterized in that: A central groove (1) and a bottom through groove (5) are connected inside the seat leg; A locking assembly (4) for locking the position of the seat legs, the locking assembly (4) including a vertical insert (41) that is slidably disposed in the bottom through groove (5) and engages with the bottom rack (3). The support frame (43) is slidably sleeved on the outside of the vertical insert (41), and has at least two rollers (44) on it. A transverse insert (45) is inserted into and connected to the transverse through holes (46) on the two vertical surfaces of the bottom through groove (5). An adjustment part (42) is provided between the two opposing horizontal inserts (45) and the vertical insert (41) and the support frame (43); When unlocked, the adjustment unit (42) drives the horizontal insertion block (45) and the vertical insertion block (41) to separate from the side rack (2) and the bottom rack (3) respectively, and at the same time, the roller (44) supports the seat legs; When locked, the adjustment part (42) drives the roller (44) to retract and make the horizontal insert (45) and the vertical insert (41) engage with the side rack (2) and the bottom rack (3) respectively.

2. The locking mechanism for automotive seat slide rails according to claim 1, characterized in that, The two side racks (2) are respectively fixed on two vertical surfaces parallel to the axial direction inside the slide rail, and multiple teeth on the side racks (2) are distributed in parallel along the vertical direction.

3. The locking mechanism for automotive seat slide rails according to claim 1, characterized in that, The bottom rack (3) is fixedly installed at the bottom inside the slide rail, and several teeth on the bottom rack (3) are arranged side by side along the axial direction of the slide rail.

4. The locking mechanism for automotive seat slide rails according to claim 1, characterized in that, The end face of the horizontal insert (45) near the slide rail is a toothed surface, and the bottom of the vertical insert (41) is also a toothed surface.

5. The locking mechanism for automotive seat slide rails according to claim 1, characterized in that, The transverse through holes (46) are located on the vertical surface of the bottom through groove (5) near the vertical inner wall of the slide rail, and the transverse through holes (46) correspond one-to-one in the width direction of the slide rail.

6. The locking mechanism for automotive seat slide rails according to claim 1, characterized in that, The adjustment part (42) includes two horizontal bars (421) fixed in parallel in the bottom groove (5) and two sliders (422) slidably sleeved on the horizontal bars (421). A telescopic cylinder (423) is used to push the two coaxial sliders (422) closer to each other or further away. One side of the horizontal insertion block (45) is fixed on the slider (422). A movable frame (424) is provided between the vertical surface of the slider (422) near the vertical insertion block (41) and the vertical insertion block (41) and the support frame (43). Two adjacent movable frames (424) together form a rhomboid support.

7. The locking mechanism for automotive seat slide rails according to claim 6, characterized in that, The movable frame (424) includes two connecting arms that are vertically and side by side hinged to the slider (422), and the free ends of the two connecting arms are respectively hinged to the vertical insert (41) and the support frame (43).

8. The locking mechanism for automotive seat slide rails according to claim 6, characterized in that, The horizontal insert (45) and the crossbar (421) are staggered in the horizontal radial direction of the crossbar (421), and the horizontal insert (45) is located between the slider (422) and the side rack (2).

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