A seat rail assembly with dual unlocking mechanism

Abstract

This invention relates to a seat rail assembly with a dual unlocking mechanism. A toothed plate at a higher position engages with the toothed window of the lower rail to lock the upper rail to the lower rail. An unlocking handle assembly, via an unlocking pin, acts on the toothed plate to disengage it from the toothed window of the lower rail, thereby unlocking the upper rail and enabling comfort adjustment. An EE unlocking bracket is rotatably mounted on the upper rail assembly and has an upper comfort adjustment stop point. A front bracket is fixedly mounted on the lower rail and has a lower comfort adjustment stop point. The upper and lower comfort adjustment stop points contact each other to limit the forward travel of the upper rail relative to the lower rail during comfort adjustment. A fork unlocking assembly is mounted on the upper rail and acts on the toothed plate to disengage it from the toothed window of the lower rail, thereby unlocking the upper rail and enabling easy entry and exit adjustment. According to the seat rail assembly with the dual unlocking mechanism of this invention, in addition to the unlocking handle assembly acting on the toothed plate for unlocking, the fork unlocking assembly acting on the toothed plate adds an unlocking point for the manual rail, enabling easy entry and exit for three rows of passengers.

Description

Technical Field

[0001] This invention relates to automobile seats, and more specifically to a seat slide rail assembly with a dual unlocking mechanism. Background Technology

[0002] For six-seater and seven-seater models, different seat folding methods are required to enable access for three rows of passengers. Currently, manual seat rails usually have only one unlocking point. The rail needs to be activated at this unlocking point for both normal comfort unlocking and access for three rows of passengers. The requirements for rail travel and seat layout space are often different for the two functions, which makes the implementation of the Easy Entry (EE) function more complicated. Summary of the Invention

[0003] To address the problem in the prior art that both comfort unlocking and the entry / exit unlocking for all three rows of passengers operate at the same unlocking point, this invention provides a seat slide rail assembly with a dual unlocking mechanism.

[0004] According to the present invention, a seat slide rail assembly with a dual unlocking mechanism includes an unlocking handle assembly, a slide rail assembly, an EE unlocking bracket, and a front bracket. The unlocking handle assembly is rotatably mounted on the slide rail assembly. The slide rail assembly includes an upper rail assembly and a lower rail assembly that are slidably parallel to each other. The lower rail assembly has a lower rail. The upper rail assembly includes an unlocking pin, a toothed plate, an upper rail, and a fork unlocking assembly. The upper rail is slidably mounted on the lower rail. The assembly formed by the unlocking pin and the toothed plate is vertically mounted on the upper rail. The toothed plate at the higher position engages with the toothed window of the lower rail to unlock the upper rail. The upper rail is locked to the lower rail; the unlocking handle assembly acts on the toothed plate via the unlocking pin to disengage it from the toothed window of the lower rail, thereby unlocking the upper rail and enabling comfort adjustment; the EE unlocking bracket is rotatably mounted on the upper rail assembly and has a comfort adjustment upper stop point, the front bracket is fixedly mounted on the lower rail and has a comfort adjustment lower stop point, the comfort adjustment upper stop point and the comfort adjustment lower stop point contact each other to limit the travel of the upper rail relative to the lower rail during comfort adjustment; the shift fork unlocking assembly is mounted on the upper rail and acts on the toothed plate to disengage it from the toothed window of the lower rail, thereby unlocking the upper rail and enabling easy access for adjustment.

[0005] Preferably, the fork unlocking assembly has a fork, and the upper rail has a square groove through which the fork extends.

[0006] Preferably, the shift fork unlocking assembly further includes an EE unlocking plastic head, which inserts into a groove-shaped structure at the front end of the shift fork to prevent abnormal noise when acting on the toothed plate.

[0007] Preferably, the shift fork is a symmetrical component, and the shift fork unlocking assembly also includes a POP rivet, with the two symmetrically arranged shift forks being riveted together by the POP rivet.

[0008] Preferably, the slide rail assembly further includes a trigger roller assembly and an EE return spring, wherein the trigger roller assembly is rotatably mounted on the upper rail assembly through the EE return spring and provides a restoring force through the EE return spring.

[0009] Preferably, the trigger roller assembly includes a trigger roller, a bracket, and an EE unlocking pin, wherein the trigger roller and the bracket are riveted together, the EE unlocking pin and the bracket are riveted together, and the EE unlocking pin is torsionally connected to the fork unlocking assembly.

[0010] Preferably, the front bracket has an EE function retaining surface, on which the trigger roller rolls to maintain the raised state of the trigger roller assembly.

[0011] Preferably, the slide rail assembly further includes a connecting pin mounted on the upper rail assembly, and the EE unlocking bracket is rotatably mounted on the upper rail assembly via the connecting pin.

[0012] Preferably, the slide rail assembly further includes a gear pair consisting of a meshing large gear and a small gear, the trigger roller assembly is torsionally connected to the large gear, and the connecting pin is torsionally connected to the small gear.

[0013] Preferably, in the initial position, the upper rail is locked to the lower rail, and the distance between the upper and lower comfort adjustment points limits the comfort adjustment travel.

[0014] Preferably, in the EE start position, the upper comfort adjustment point rotates past the lower comfort adjustment point.

[0015] Preferably, the slide rail assembly further includes an EE upper stop welding assembly, which is fixedly mounted on the upper rail assembly and has a downwardly extending EE upper stop. In the initial position, the distance between the EE upper stop and the comfort adjustment upper stop limits the easy-in and out adjustment stroke.

[0016] Preferably, the seat slide rail assembly further includes a rotating bushing mounted on the slide rail assembly, and the unlocking handle assembly is rotatably mounted on the slide rail assembly via the rotating bushing.

[0017] Preferably, the upper rail assembly further includes an EE mounting bracket fixedly mounted on the upper rail, wherein the rotating bushing is engaged in the EE mounting bracket to support the rotation of the unlocking handle assembly.

[0018] Preferably, the upper rail assembly also includes a limiting pin, which is riveted to the side of the EE mounting bracket to limit the comfort adjustment.

[0019] Preferably, the slide rail assembly further includes an EE unlocking return spring, the two ends of which are respectively connected to the EE unlocking bracket and the EE mounting bracket to provide a restoring force to the EE unlocking bracket.

[0020] Preferably, the seat slide rail assembly further includes an unlocking return spring mounted on the unlocking handle assembly, which acts on the slide rail assembly to provide a restoring force to the unlocking handle assembly.

[0021] The seat slide rail assembly with dual unlocking mechanism according to the present invention, based on the unlocking handle assembly acting on the toothed plate to achieve unlocking, adds an unlocking point for the manual slide rail by means of a fork unlocking component acting on the toothed plate, enabling easy access for three rows of passengers. The seat slide rail assembly with dual unlocking mechanism according to the present invention features a new unlocking method independent of the unlocking point of the platform slide rail, ensuring that the unlocking force and unlocking stroke for comfort adjustment are unaffected. The seat slide rail assembly with dual unlocking mechanism according to the present invention provides adjustable unlocking force and displacement for easy access, and the unlocking handle does not tilt upwards, maximizing space saving and avoiding any impact on appearance. In summary, the seat slide rail assembly with dual unlocking mechanism according to the present invention is based on the platform design of all toothed manual locking slide rails. The relevant slide rail platform parts can be shared. Only the process of assembling the fork and installing the relevant application parts after riveting the unlocking pin at the upper rail assembly level needs to be added. It can meet the easy entry and exit function of three rows of passengers in all TIP and PITCH seats on the market. It can also increase the unlocking stroke and reduce the unlocking force, which can solve the problem that the unlocking stroke needs to be compensated after the zipper unlocking has been durable. For seats with TIP easy entry and exit function, the use of related modules and zipper stroke compensators can be eliminated, which has a cost advantage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the seat slide rail assembly of the dual unlocking mechanism according to a preferred embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Exploded view;

[0024] Figure 3 yes Figure 2 Exploded view of the upper rail assembly;

[0025] Figure 4 yes Figure 3 Assembly diagram of the EE mounting bracket;

[0026] Figure 5 yes Figure 3 A schematic diagram of the assembly of the toggle fork unlocking component;

[0027] Figure 6 yes Figure 2 Assembly diagram of the trigger roller assembly;

[0028] Figure 7 yes Figure 2 A cross-sectional view of the assembly of the large gear;

[0029] Figure 8 yes Figure 2 A sectional view of the assembly of the small gear;

[0030] Figure 9 yes Figure 2 A schematic diagram of the meshing state of the large gear and the small gear;

[0031] Figure 10 It shows Figure 1 The initial position of the seat slide rail assembly;

[0032] Figure 11 It shows Figure 1 The seat comfort adjustment status;

[0033] Figure 12 It shows Figure 1 The seat rail assembly is adjusted to its most forward position for comfort.

[0034] Figure 13 yes Figure 1 A cross-sectional view of the seat rail assembly;

[0035] Figure 14 It shows Figure 1 The EE start position of the seat rail assembly;

[0036] Figure 15 It shows Figure 1 The EE function toothed plate unlocking position of the seat slide rail assembly;

[0037] Figure 16 It shows Figure 1 The seat rail assembly retains the unlocked position;

[0038] Figure 17 and Figure 18 It shows Figure 1 The foremost position of the EE in the seat rail assembly. Detailed Implementation

[0039] The preferred embodiments of the present invention are given below with reference to the accompanying drawings and described in detail.

[0040] like Figure 1 As shown, the seat slide rail assembly of the dual unlocking mechanism according to a preferred embodiment of the present invention is an H-shaped slide rail assembly, which includes an unlocking handle assembly 1, an unlocking return spring 2, a slide rail assembly 3 and a rotating bushing 4. The two slide rail assemblies 3 are arranged in parallel and spaced apart. The two ends of the unlocking handle assembly 1 located between the slide rail assemblies 3 are respectively rotatably mounted on the two slide rail assemblies 3 through the rotating bushing 4. The unlocking return spring 2 is mounted on the unlocking handle assembly 1 and acts on the slide rail assembly 3 to provide a restoring force for the unlocking handle assembly 1.

[0041] like Figure 2As shown, the slide rail assembly 3 includes an upper rail assembly 17 and a lower rail assembly 23 that can slide back and forth relative to each other, wherein the lower rail assembly 23 has a lower rail 10 fixedly mounted on the vehicle body.

[0042] like Figure 3 As shown, the upper rail assembly 17 includes an unlocking pin 7, a toothed plate 8, and an upper rail 9, wherein the upper rail 9 is slidably mounted on the lower rail 10 (see Figure 10). Figure 2 On the upper rail 9, the assembly formed by the unlocking pin 7 and the toothed plate 8 is vertically and flexibly mounted on the upper rail 9 below it. The toothed plate 8, initially in a high position, engages with the toothed window of the lower rail 10 to lock the upper rail 9 to the lower rail 10. The unlocking handle assembly 1, through the unlocking pin 7, acts on the toothed plate 8, causing it to move downwards to a low position, disengaging from the toothed window of the lower rail 10, thereby unlocking the upper rail 9 and allowing it to slide, thus realizing the seat's fore-and-aft adjustment function (i.e., comfort adjustment). Specifically, the upper rail 9 has an upper rail spring latch 9.1, and the assembly formed by riveting the unlocking pin 7 and the toothed plate 8 together is latched in the upper rail spring latch 9.1 via a spring.

[0043] like Figure 3 As shown, the upper rail assembly 17 also includes an EE mounting bracket 24, which is fixedly mounted on the upper rail 9 above it. Specifically, an inner rail nut 27 is welded to the upper rail 9, and bolts 13 pass through the EE mounting bracket 24 and the upper rail 9 to connect with the inner rail nut 27 to secure the EE mounting bracket 24. Figure 4 As shown, the rotating bushing 4 is installed in the EE mounting bracket 24, which supports the unlocking handle assembly 1 (see...). Figure 1 The rotation also eliminates gaps and abnormal noises. The upper rail assembly 17 also includes a limit pin 25, which is riveted to the side of the EE mounting bracket 24 and serves as a comfort adjustment limit.

[0044] like Figure 3 As shown, the upper rail assembly 17 also includes a fork unlocking assembly 26, which is disposed between the upper rail 9 and the toothed plate 8. Specifically, the upper rail 9 has a square groove 9.2, one end of the fork unlocking assembly 26 is inserted into the square groove 9.2, and the other end can act on the toothed plate 8 to drive the toothed plate 8 to descend. The fork unlocking assembly 26 acts on the toothed plate 8 to move it downward to a low position and disengage it from the lower rail 10 (see...). Figure 2 The toothed window can unlock the upper rail 9 to allow it to slide, enabling the seat to be adjusted forward (i.e., Easy Entry adjustment). Figure 5 As shown, the fork unlocking assembly 26 includes a fork 26.1, an EE unlocking plastic head 26.2, a POP rivet 26.3, and a square opening 26.4. The fork 26.1 is a symmetrical piece and is riveted by the POP rivet 26.3. The EE unlocking plastic head 26.2 is inserted into the groove feature at the front end of the fork 26.1 to unlock the toothed plate 8 and prevent abnormal noise.

[0045] In this embodiment, the assembly of the upper rail assembly 17 includes: first, connecting the inner rail nut 27 to the upper rail 9 by projection welding; then, inserting the rotating bushing 4 into the relevant features of the EE mounting bracket 24; and then riveting the limiting pin 25 to the EE mounting bracket 24. Next, inserting the fork unlocking assembly 26 from the inside of the upper rail 9 into the square groove 9.2 from bottom to top; and then, engaging the assembly formed by the unlocking pin 7 and the toothed plate 8 into the upper rail spring latch 9.1 using a spring clip. Finally, connecting the EE mounting bracket 24 to the inner rail nut 27 with bolts 13, thus completing the assembly of the entire upper rail assembly 17.

[0046] Back Figure 1 The H-type slide rail assembly includes an EE unlocking bracket 5 and a front bracket 6. The EE unlocking bracket 5 is rotatably mounted on the EE mounting bracket 24 and has a comfort adjustment upper stop point 5.1. The front bracket 6 is fixedly mounted on the lower rail 10 and has a comfort adjustment lower stop point 6.1. The comfort adjustment upper stop point 5.1 and the comfort adjustment lower stop point 6.1 contact each other to limit the travel of the upper rail 9 relative to the lower rail 10 during comfort adjustment.

[0047] like Figure 2 As shown, the slide rail assembly 3 also includes a trigger roller assembly 14 and an EE return spring 15, wherein the trigger roller assembly 14 is rotatably mounted on the EE mounting bracket 24 through the EE return spring 15 and provides a restoring force through the EE return spring 15. Figure 6 As shown, the trigger roller assembly 14 includes a trigger roller 14.1, a step pin 14.2, a bracket 14.3, and an EE unlocking pin 14.4. The trigger roller 14.1 and the bracket 14.3 are riveted together by the step pin 14.2, and the EE unlocking pin 14.4 is riveted to the bracket 14.3 and connected to the fork unlocking assembly 26 (see [link]). Figure 7 Torsional connection. Specifically, the EE unlocking pin 14.4 of the trigger roller assembly 14 passes through the square opening 26.4 of the fork unlocking assembly 26 (see...). Figure 5 Installation. It should be understood that after riveting, the trigger roller 14.1 and the bracket 14.3 are preferably designed to allow the trigger roller 14.1 to rotate freely, enabling it to roll while maintaining its function and reducing slippage force; after riveting, the axis of the EE unlocking pin 14.4 and the bracket 14.3 are preferably designed to be perpendicular to the plane of the bracket 14.3. In this embodiment, the trigger roller assembly 14 also includes an EE return spring attachment point 14.5, with one arm of the EE return spring 15 resting on the inner surface of the EE mounting bracket 24 (see...). Figure 2 The other arm is engaged with the EE return spring attachment point 14.5. Additionally, returning... Figure 2The front bracket 6 also has an EE function holding surface 6.2, which is set above the top surface of the lower rail 10. The trigger roller 14.1 rolls on the EE function holding surface 6.2 to maintain the tilted state of the trigger roller assembly 14.

[0048] like Figure 2 As shown, the slide rail assembly 3 also includes a connecting pin 16 mounted on the EE mounting bracket 24, and the EE unlocking bracket 5 is rotatably mounted on the EE mounting bracket 24 via the connecting pin 16 (see...). Figure 8 Additionally, the EE unlocking bracket 5 also has an EE zipper attachment point 5.2, to which an external force is applied to drive the EE unlocking bracket 5 to rotate around the axis of the connecting pin 16.

[0049] like Figure 2 As shown, the slide rail assembly 3 also includes a meshing large gear 18 and a small gear 19 (see...). Figure 9 The gear pair consists of a trigger roller assembly 14, which is torsionally connected to the large gear 18 via a spline, and a connecting pin 16, which is torsionally connected to the small gear 19 via a spline. Figure 7 As shown, the large gear 18 is assembled with the EE unlocking pin 14.4, and the step at the end of the EE unlocking pin 14.4 is fully exposed, allowing the large gear 18 to rotate freely after locking the nut 20. Figure 8 As shown, the pinion 19 is assembled with the connecting pin 16, and the step at the end of the connecting pin 16 is fully exposed, allowing the pinion 19 to rotate freely after the locking nut 20 is engaged. Figure 9 As shown, the large gear 18 and the small gear 19 are assembled to ensure that the meshing teeth are in the correct position, thus avoiding insufficient unlocking angle due to the different adjustable angles of the large sector gear 18.

[0050] like Figure 2 As shown, the slide rail assembly 3 also includes an EE unlocking return spring 21, whose two ends are respectively connected to the two round holes of the EE unlocking bracket 5 and the EE mounting bracket 24 to provide a restoring force for the EE unlocking bracket 5.

[0051] like Figure 2 As shown, the slide rail assembly 3 also includes an EE upper stop welding assembly 28, which is fixedly mounted on the upper rail assembly 17 and has a downwardly extending EE upper stop 22. Specifically, the inner rail nut 27 is welded and fixed to the upper rail 9, and the bolt 13 passes through the EE upper stop welding assembly 28 and the upper rail 9 to connect with the inner rail nut 27 to achieve the fixation of the EE upper stop welding assembly 28.

[0052] In this embodiment, the assembly of the slide rail assembly 3 includes: First, connecting the EE upper stop welding assembly 28 and the upper rail assembly 17 assembly with bolts 13; Next, mounting the trigger roller assembly 14 onto the EE mounting bracket 24 through the square opening 26.4 of the EE return spring 15 and the shift fork unlocking assembly 26, while simultaneously attaching the arm of the EE return spring 15 to the inner surface of the EE mounting bracket 24; Next, inserting the splined shaft feature on the EE unlocking pin 14.4 into the splined groove of the large gear 18, and using a tooling to hold the fan-shaped surface of the large gear 18, ensuring that the large gear 18 and the shift fork unlocking assembly are secure. 26 Initial position; Next, insert the connecting pin 16 into the corresponding round hole of the EE mounting bracket 24, and insert it into the spline groove of the pinion 19 through the spline shaft feature on the connecting pin 16, so that the EE unlocking bracket 5 is passed through by the connecting pin 16; Next, fix the nut 20 and the threaded feature of the EE unlocking pin 14.4 / connecting pin 16 head by thread engagement; Next, snap the other arm of the EE return spring 15 into the EE return spring hanging point 14.5, and then hang the two hanging points of the EE unlocking return spring 21 in the two round holes of the EE unlocking bracket 5 and the EE mounting bracket 24 respectively.

[0053] The following is a brief explanation of the principles of comfort adjustment.

[0054] like Figure 10 As shown, in the initial position, the upper rail 9 is locked to the lower rail 10. The distance between the upper comfort adjustment point 5.1 of the EE unlocking bracket 5 and the lower comfort adjustment point 6.1 of the front bracket 6 defines the comfort adjustment stroke L1. The distance between the upper EE point welding assembly 28 and the upper comfort adjustment point 5.1 of the EE unlocking bracket 5 defines the easy entry and exit adjustment stroke L2.

[0055] like Figure 11 As shown, when adjusting the seat comfort, the unlocking handle assembly 1 is raised and rotates counterclockwise around the rotating bushing 4, thereby driving the unlocking handle assembly 1 to press the unlocking pin 7, which causes the toothed plate 8 riveted to the unlocking pin 7 to move downward, thereby disengaging from the toothed window in the lower rail 10, allowing the upper rail 9 to slide, thus allowing the seat to be adjusted forward and backward.

[0056] like Figure 12 As shown, at the foremost position of comfort adjustment, the upper rail 9 moves forward relative to the lower rail 10 and completes the comfort adjustment stroke L1 (see...). Figure 10 The upper comfort adjustment point 5.1 of the EE unlock bracket 5 and the lower comfort adjustment point 6.1 of the front bracket 6 are about to make contact.

[0057] like Figure 13 As shown, the rearward sliding of the seat is limited by the upper rear stop point 11 of the upper rail 9 and the lower rear stop point 12 of the lower rail 10.

[0058] The following is a brief explanation of the Easy Entry principle.

[0059] like Figure 14 As shown, in the EE activation position, the upper comfort adjustment point 5.1 of the EE unlocking bracket 5 and the lower comfort adjustment point 6.1 of the front bracket 6 are spaced apart. In this embodiment, in the EE activation position, the distance between the upper comfort adjustment point 5.1 of the EE unlocking bracket 5 and the lower comfort adjustment point 6.1 of the front bracket 6 is the comfort adjustment travel L1 (see...). Figure 10 -6mm. When the seat is in easy entry and exit adjustment, by driving the EE pull lock hook point 5.2 to move backward, the EE unlock bracket 5 rotates counterclockwise around the axis of the connecting pin 16, causing the comfort adjustment upper stop point 5.1 of the EE unlock bracket 5 to rotate counterclockwise past the comfort adjustment lower stop point 6.1 on the front bracket 6, thereby allowing the slide rail to enter the Easy Entry stroke.

[0060] Since the EE unlocking bracket 5 is fixed to the connecting pin 16 by the nut 20, and the pinion 19 and the connecting pin 16 are connected by a spline, the counterclockwise rotation of the connecting pin 16 drives the large gear 18 to rotate clockwise through the externally meshing gear pair. Similarly, the large gear 18 and the trigger roller assembly 14 are connected by a spline. The square shaft of the EE unlocking pin 14.4 of the trigger roller assembly 14 passes through the square opening 26.4 of the fork unlocking assembly 26. The clockwise rotation of the large gear 18 drives the fork unlocking assembly 26 to rotate clockwise. Figure 15 As shown, the EE unlocking plastic head 26.2 acts on the toothed plate 8, causing the toothed plate 8 to move downward to the EE function toothed plate unlocking position shown in the figure, thereby disengaging from the toothed window in the lower rail 10, allowing the upper rail 9 to slide, thus enabling the seat to be adjusted forward and backward.

[0061] The large gear 18 rotates clockwise, causing the trigger roller assembly 14 to rotate clockwise as well. Synchronously, the trigger roller 14.1 rises to a certain height. As the upper rail 9 slides forward, the trigger roller 14.1 tangentially mounts the EE function holding surface 6.2. Figure 16 As shown, this keeps the trigger roller assembly 14 in this position, that is, the fixed fork unlocking assembly 26 keeps the toothed plate 8 in the pressed state, and the slide rail can achieve unlocking and holding regardless of whether the drive of the EE pull lock attachment point 5.2 is removed.

[0062] like Figure 17 As shown, the trigger roller 14.1 always rests tangentially on the EE function holding surface 6.2 to keep the slide rail in the normally unlocked state until the upper rail 9 completes the easy-in / out adjustment stroke L2 (see...). Figure 10 Slide it to the foremost position. At this point, the upper EE point 22 and the lower comfort adjustment point 6.1 contact each other to limit the foremost position of EE. Figure 18 As shown.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Various variations can be made to the above embodiments of the present invention. That is, all simple and equivalent changes and modifications made based on the claims and description of this invention fall within the protection scope of the claims of this patent. All aspects not described in detail in this invention are conventional technical content.

Claims

1. A seat slide rail assembly with a dual unlocking mechanism, characterized in that, The seat slide rail assembly includes an unlocking handle assembly, a slide rail assembly, an EE unlocking bracket, a front bracket, and a trigger roller assembly. The unlocking handle assembly is rotatably mounted on the slide rail assembly. The slide rail assembly includes an upper rail assembly and a lower rail assembly that are slidably parallel to each other. The lower rail assembly has a lower rail. The upper rail assembly includes an unlocking pin, a toothed plate, an upper rail, and a fork unlocking assembly. The upper rail is slidably mounted on the lower rail. The assembly formed by the unlocking pin and the toothed plate is vertically mounted on the upper rail. The toothed plate in the high position engages with the toothed window of the lower rail to lock the upper rail to the lower rail. The unlocking handle assembly uses an unlocking pin to act on the toothed plate, causing it to disengage from the toothed window of the lower rail, thereby unlocking the upper rail and enabling comfort adjustment. The EE unlocking bracket is rotatably mounted on the upper rail assembly and has a comfort adjustment upper stop point. The front bracket is fixedly mounted on the lower rail and has a comfort adjustment lower stop point. The comfort adjustment upper stop point and the comfort adjustment lower stop point contact each other to limit the travel of the upper rail relative to the lower rail during comfort adjustment. The fork unlocking assembly is installed on the upper rail and acts on the toothed plate to disengage it from the toothed window of the lower rail, thereby unlocking the upper rail and enabling easy entry and exit adjustment. The trigger roller assembly is mounted on the upper rail assembly and includes the trigger roller. The front bracket has an EE function retaining surface. The trigger roller rolls on the EE function retaining surface to maintain the trigger roller assembly in a tilted state. The fork unlocking assembly fixed to the trigger roller assembly maintains the toothed plate in a pressed state, thereby achieving the unlocking and retention of the slide rail.

2. The seat slide rail assembly according to claim 1, characterized in that, The fork unlocking assembly has a fork, and the upper rail has a square groove through which the fork extends.

3. The seat slide rail assembly according to claim 2, characterized in that, The shift fork unlocking assembly also includes an EE unlocking plastic head, which inserts into a slotted structure at the front end of the shift fork to prevent noise when acting on the toothed plate.

4. The seat slide rail assembly according to claim 2, characterized in that, The shift forks are symmetrical components, and the shift fork unlocking assembly also includes POP rivets. The two symmetrically arranged shift forks are riveted together by the POP rivets.

5. The seat slide rail assembly according to claim 1, characterized in that, The slide rail assembly also includes an EE return spring, wherein the trigger roller assembly is rotatably mounted on the upper rail assembly through the EE return spring and provides a restoring force through the EE return spring.

6. The seat slide rail assembly according to claim 5, characterized in that, The trigger roller assembly also includes a bracket and an EE unlocking pin, wherein the trigger roller and the bracket are riveted together, the EE unlocking pin and the bracket are riveted together and are torsionally connected to the fork unlocking assembly.

7. The seat slide rail assembly according to claim 5, characterized in that, The slide rail assembly also includes a connecting pin mounted on the upper rail assembly, and the EE unlocking bracket is rotatably mounted on the upper rail assembly via the connecting pin.

8. The seat slide rail assembly according to claim 7, characterized in that, The slide rail assembly also includes a gear pair consisting of a meshing large gear and a small gear, the trigger roller assembly is torsionally connected to the large gear, and the connecting pin is torsionally connected to the small gear.

9. The seat slide rail assembly according to claim 1, characterized in that, In the initial position, the upper rail is locked to the lower rail, and the distance between the upper and lower comfort adjustment points limits the comfort adjustment travel.

10. The seat slide rail assembly according to claim 9, characterized in that, With the EE start position, the upper comfort adjustment point rotates past the lower comfort adjustment point.

11. The seat slide rail assembly according to claim 9, characterized in that, The slide rail assembly also includes an EE upper stop welding assembly, which is fixedly mounted on the upper rail assembly and has a downwardly extending EE upper stop. In the initial position, the distance between the EE upper stop and the comfort adjustment upper stop limits the easy-in and out adjustment stroke.

12. The seat slide rail assembly according to claim 1, characterized in that, The seat rail assembly also includes a rotating bushing mounted on the rail assembly, and the unlocking handle assembly is rotatably mounted on the rail assembly via the rotating bushing.

13. The seat slide rail assembly according to claim 12, characterized in that, The upper rail assembly also includes an EE mounting bracket fixedly mounted on the upper rail, wherein a rotating bushing is inserted into the EE mounting bracket to support the rotation of the unlocking handle assembly.

14. The seat slide rail assembly according to claim 13, characterized in that, The upper rail assembly also includes a limit pin, which is riveted to the side of the EE mounting bracket to limit the comfort adjustment.

15. The seat slide rail assembly according to claim 13, characterized in that, The slide rail assembly also includes an EE unlocking return spring, whose two ends are connected to the EE unlocking bracket and the EE mounting bracket respectively to provide a restoring force to the EE unlocking bracket.

16. The seat slide rail assembly according to claim 1, characterized in that, The seat rail assembly also includes an unlocking return spring mounted on the unlocking handle assembly, which acts on the rail assembly to provide a restoring force to the unlocking handle assembly.

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