Middle-row seat lifting keeping structure

Abstract

The utility model provides a middle-row seat lifting keeping structure which comprises a seat framework and a sliding rail assembly, the sliding rail assembly comprises an inner sliding rail and an outer sliding rail, the front end of the bottom of the seat framework is hinged to the inner sliding rail, a front rotating shaft connecting rod is arranged at the front end of the bottom of the seat framework, a locking hook assembly is arranged on the inner sliding rail, and the locking hook assembly is arranged on the outer sliding rail. A lifting keeping and releasing mechanism is arranged between the inner sliding rail and the outer sliding rail, when the seat framework is lifted upwards around the front end hinge point, the front rotating shaft connecting rod can be driven to be clamped into the locking hook assembly, and lifting keeping of the seat framework is achieved. When the seat framework moves forwards, the seat framework can be kept in a lifting state all the time; when the seat framework moves backwards to return, the lifting keeping and releasing mechanism can be driven to move, so that lifting keeping and releasing of the seat framework are achieved, and at the moment, the seat framework is pressed downwards, and resetting of the seat framework can be achieved. According to the utility model, the use requirements of the middle-row seat in a comity function scene can be met, and the flexibility and convenience of the use of the seat are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a middle row seat lifting and retaining structure. Background Technology

[0002] With the continuous development of the automotive industry, people have placed higher demands on the functionality and comfort of car seats. In multi-seat vehicles, such as MPVs (Multi-Purpose Vehicles) and some SUVs (Sport Utility Vehicles), the middle row seats often need to have a courtesy function to allow passengers easier access to the third row or other spaces within the vehicle. This courtesy function typically requires the middle row seats to be able to rise at a certain angle around the front hinge point after unlocking, and automatically maintain this raised state during forward movement. After the passenger has passed, the seat should automatically de-raise and return to its normal seating position.

[0003] However, the existing middle-row seat structure has several shortcomings in achieving the aforementioned courtesy function. Specifically, after unlocking the floor lock and raising the seat around the front hinge point, the existing seat structure lacks an effective lifting and holding mechanism. This causes the seat to easily fall due to external forces or its own weight during the raising process, making it impossible to maintain a stable raised position and causing inconvenience for passengers. Furthermore, when the seat moves forward to provide more passage, the existing structure often cannot ensure that the seat remains raised throughout the entire forward movement, further affecting the effectiveness of the courtesy function. More importantly, after a passenger has passed, the existing seat structure lacks an automatic release mechanism during the reset process. Passengers need to manually release the raised position, which not only increases the complexity of use but may also damage the seat or other components in the vehicle due to improper operation. Therefore, the existing middle-row seat structure has significant functional defects and operational inconveniences in achieving the courtesy function. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model aims to provide a middle row seat lifting and holding structure, which can realize the functions of automatic holding after the seat is lifted, continuous lifting and holding during the forward movement, and automatic release of the lifting and holding state when returning to the rear position, thereby improving the convenience of passengers getting on and off the vehicle.

[0005] To achieve the above objectives, this utility model aims to provide a middle-row seat lifting and holding structure, including a seat frame and a slide rail assembly. The slide rail assembly includes an inner slide rail and an outer slide rail, with a sliding locking mechanism between them. The bottom front end of the seat frame is hinged to the inner slide rail, and the bottom rear end of the seat frame is locked and fixed to the inner slide rail by a floor lock. A front pivot connecting rod is provided at the bottom front end of the seat frame, and a locking hook assembly is provided on the inner slide rail corresponding to the front pivot connecting rod. A lifting and holding release mechanism is provided between the inner and outer slide rails. After the floor lock is unlocked, when the rear end of the seat frame rises around the hinge point between its front end and the inner slide rail, it can drive the front pivot connecting rod to engage in the locking hook assembly, thereby achieving the lifting and holding of the seat frame; when the sliding locking mechanism is unlocked, the seat frame can always maintain the lifting state when it moves forward; when the seat frame moves backward to return to its original position, it can drive the lifting and holding release mechanism to move, thereby driving the front pivot connecting rod to separate from the locking hook assembly, thus achieving the lifting and holding release of the seat frame. At this time, pressing down on the seat frame can achieve the reset of the seat frame.

[0006] In the above solution: the slide rail assembly includes two sets of symmetrically arranged inner slide rails and outer slide rails. Each inner slide rail on both sides is equipped with a front slide rail bracket. The bottom front end of the seat frame is equipped with a front pivot, which is hinged between the two front slide rail brackets, thereby achieving hinged connection between the bottom front end of the seat frame and the inner slide rails. The hinged design of the front pivot allows the front end of the seat frame to be directly adjusted with the inner slide rail as the rotation center, making it suitable for scenarios requiring frequent adjustments to the seat posture.

[0007] In the above scheme: the middle part of the locking hook assembly is hinged to one side of the slide rail front bracket via the locking hook assembly pivot. The slide rail front bracket is provided with a tension spring fixing pin. A positioning tension spring is provided between the tension spring fixing pin and the locking hook assembly. The positioning tension spring is located below the locking hook assembly pivot and has a spring force that drives the locking hook assembly to rotate counterclockwise. Under this spring force, the counterclockwise side of the locking hook assembly abuts against the tension spring fixing pin, thereby fixing the locking hook assembly in the designed position. The locking hook assembly is also provided with a locking edge and a return pin. The front pivot connecting rod is inverted U-shaped, with its top end fixed to the front pivot. One lower end of its side is provided with a linkage pin corresponding to the locking edge, and the other lower end of its side is provided with a locking mechanism return contact edge corresponding to the return pin. When the seat frame is raised, it can drive the front pivot connecting rod to rotate counterclockwise, thereby driving the linkage pin to engage in the locking edge, thereby realizing the lifting and holding of the seat frame. The locking hook assembly is designed to achieve stable positioning after the seat frame is raised through mechanical locking, and has the advantages of compact structure, convenient maintenance and high reliability.

[0008] In the above scheme: the lifting and holding release mechanism includes a one-way arm and a quick-access stop pin. The upper end of the one-way arm is hinged to the lower end of the locking hook assembly via a one-way arm pivot, and a one-way arm torsion spring is provided between the one-way arm and the locking hook assembly. The one-way arm torsion spring has the torque to drive the one-way arm to remain in the designed position. The quick-access stop pin is fixed to the outer wall of the front end of the outer slide rail. When the sliding locking mechanism is unlocked, when the seat frame moves forward, the one-way arm can abut against the quick-access stop pin and be pushed to rotate counterclockwise until it passes the quick-access stop pin. After passing the quick-access stop pin, the one-way arm can return to the designed position under the action of the one-way arm torsion spring. The locking hook assembly is provided with a stop point, and the one-way arm is aligned with the stop point on the clockwise side. When the seat frame moves backward to return to its original position, it drives the one-way arm to rotate the locking hook assembly clockwise, separating the linkage pin from the locking edge. This releases the lifting and holding mechanism of the seat frame. At this time, the positioning tension spring is located below the rotating shaft of the locking hook assembly and has the elastic force to drive the locking hook assembly to rotate clockwise. Under this elastic force, the clockwise side of the locking hook assembly abuts against the tension spring fixing pin, thus fixing the locking hook assembly in the open position. At this time, pressing down on the seat frame can reset the seat frame. When the seat frame resets downward, it drives the front rotating shaft connecting rod to rotate clockwise, thereby driving the locking mechanism's return contact edge to push the return pin downward, thus returning the locking hook assembly from the open position to the designed position.

[0009] That is, when the locking mechanism's return contact edge pushes the return pin downward, it can cause the positioning spring to pass over the axis of the locking hook assembly's rotating shaft, thereby changing the direction of the positioning spring's elastic force, so as to pull the locking hook assembly back to the designed position through the elastic force.

[0010] In summary, the automatic unlocking is triggered when the seat frame moves forward and then returns to its original position, eliminating the need for manual operation and improving the user experience. Furthermore, when the seat frame is pressed down, the locking hook assembly automatically resets via the linkage between the front pivot connecting rod and the return pin, further simplifying the operation. It should be noted that when the seat frame's own weight is sufficient to drive it to reset, downward pressure on the seat frame is unnecessary; after the seat frame resets, the floor lock engages to secure it.

[0011] The tension spring retaining pin has a dual function: it serves to fix and position the tension spring, and at the same time, it acts as a limit point for the locking hook assembly to remain in the designed position and open position, eliminating the need for additional limiting structures and simplifying the mechanical design.

[0012] In the above scheme, one end of the positioning tension spring is hooked and fixed to the tension spring fixing pin, and the other end is hooked and fixed to the return pin of the locking hook assembly. The structure is simple, the assembly is convenient, and it helps to reduce the number of parts.

[0013] In the above solution: the quick-access stop pin is fixed to the outer slide rail by a mounting bracket. The mounting bracket fits against the outer surface of the outer slide rail and is snapped onto the outer slide rail by a snap-fit ​​structure. The quick-access stop pin is fixed to the mounting bracket. This structure makes the quick-access stop pin easy to install and remove, facilitating subsequent maintenance and replacement.

[0014] In the above solution: the pivot connecting rod, locking hook assembly, one-way arm and quick-access stop pin are all arranged on the side of the slide rail front bracket close to the seat interior, thus hiding under the seat frame, making full use of the unused space under the seat, avoiding the occupation of other areas in the vehicle by the components, avoiding the impact of exposed structures on the overall appearance of the seat, and making the seat appearance more concise and streamlined.

[0015] The beneficial effects of this utility model are:

[0016] 1. It meets the needs of the middle row seats in the courtesy function scenario. Through a series of operations such as unlocking the floor lock, raising the seat around the front hinge point, and maintaining the raised state while moving forward, it greatly facilitates passenger passage, solves the problem that existing middle row seat structures cannot achieve this function, and improves the flexibility and convenience of seat use. 2. During the seat's forward movement, the cooperation between the front pivot connecting rod and the locking hook assembly ensures that the seat remains raised, ensuring stability and safety during movement and avoiding inconvenience or potential danger to passengers caused by seat shaking or accidental descent. 3. When the seat moves backward to its original position, it automatically drives the lifting and holding release mechanism to separate the front pivot connecting rod from the locking hook assembly, releasing the seat's lifting and holding function. This allows passengers to easily press the seat down to its original position without additional manual operation, further improving the convenience and user experience of seat use. 4. This structure cleverly utilizes the cooperation between components such as the seat frame, slide rail assembly, front pivot connecting rod, locking hook assembly, and lift-hold release mechanism to achieve the seat's lift-hold and reset functions. The components work together, resulting in a compact and reasonable structure that effectively utilizes the seat's internal space and reduces the impact on the overall vehicle layout. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the present invention.

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of point M in the middle.

[0020] Figure 4 This is a schematic diagram of the seat frame in the design phase.

[0021] Figure 5 This is a schematic diagram of the seat frame when it is raised but not moved forward.

[0022] Figure 6 This is a schematic diagram of the seat frame in a raised and forward position. Detailed Implementation

[0023] like Figure 1 As shown in Figure 6, a middle-row seat lifting and retaining structure mainly consists of a seat frame A and a slide rail assembly. The slide rail assembly includes an inner slide rail B and an outer slide rail C that are slidably connected, with a sliding locking mechanism between them. The bottom front end of the seat frame A is hinged to the inner slide rail B, and the bottom rear end of the seat frame A is locked and fixed to the inner slide rail B by a floor lock.

[0024] The bottom front end of the seat frame A is provided with a front pivot connecting rod 1, and the inner slide rail B is provided with a locking hook assembly 2 corresponding to the front pivot connecting rod 1. A lifting and holding release mechanism D is provided between the inner slide rail B and the outer slide rail C.

[0025] When the floor lock is unlocked, the rear end of seat frame A rises around the hinge point between its front end and the inner slide rail B, causing the front pivot connecting rod 1 to engage with the locking hook assembly 2, thus maintaining the raised position of seat frame A. When the sliding locking mechanism is unlocked, seat frame A remains raised as it moves forward. When seat frame A moves backward to its original position, it activates the raised position release mechanism D, causing the front pivot connecting rod 1 to separate from the locking hook assembly 2, thereby releasing the raised position of seat frame A. Pressing down on seat frame A at this point allows it to reset, returning to its designed position.

[0026] Ideally, the slide rail assembly includes two symmetrically arranged sets of inner slide rails B and outer slide rails C. Each inner slide rail B has a front support 7. The bottom front end of the seat frame A has a front pivot 11, which is hinged between the two front supports 7, thus achieving hinge connection between the bottom front end of the seat frame A and the inner slide rails B. The hinged design of the front pivot 11 allows the front end of the seat frame A to be directly adjusted with the inner slide rails B as the rotation center, making it suitable for scenarios requiring frequent seat posture adjustments.

[0027] Preferably, the middle part of the locking hook assembly 2 is hinged to one side of the slide rail front bracket 7 via the locking hook assembly pivot 22. The slide rail front bracket 7 is provided with a tension spring fixing pin 8. A positioning tension spring 3 is provided between the tension spring fixing pin 8 and the locking hook assembly 2. The positioning tension spring 3 is located below the locking hook assembly pivot 22 and has a spring force that drives the locking hook assembly 2 to rotate counterclockwise. Under this spring force, the counterclockwise side of the locking hook assembly 2 abuts against the tension spring fixing pin 8, thereby fixing the locking hook assembly 2 in the designed position.

[0028] The locking hook assembly 2 is also provided with a locking edge 21 and a return pin 23. The front rotating shaft connecting rod 1 is inverted U-shaped, with its top end fixed on the front rotating shaft 11. A linkage pin 12 is provided on one side of its lower end corresponding to the locking edge 21, and a locking mechanism return contact edge 13 is provided on the other side of its lower end corresponding to the return pin 23.

[0029] When seat frame A is raised, it drives the front pivot connecting rod 1 to rotate counterclockwise, thereby causing the linkage pin 12 to engage with the locking edge 21, thus achieving the raised and held position of seat frame A. This locking hook assembly 2 design achieves stable holding position of seat frame A after being raised through mechanical locking, and has the advantages of compact structure, convenient maintenance, and high reliability.

[0030] Preferably, the lifting and holding release mechanism D includes a one-way arm 5 and a quick-access stop pin 6. The upper end of the one-way arm 5 is hinged to the lower end of the locking hook assembly 2 via a one-way arm pivot 24, and a one-way arm torsion spring 4 is provided between the one-way arm and the locking hook assembly 2. The one-way arm torsion spring 4 has the torque to drive the one-way arm 5 to be held in the designed position. The quick-access stop pin 6 is fixed on the outer wall of the front end of the outer slide rail C.

[0031] When the sliding locking mechanism is unlocked, the seat frame A moves forward, and the one-way arm 5 can abut against the quick-release shift pin 6 and be pushed to rotate counterclockwise until it passes the quick-release shift pin 6. After passing the quick-release shift pin 6, the one-way arm 5 can return to the design position under the action of the one-way arm torsion spring 4.

[0032] The locking hook assembly 2 has a stop point 25. The clockwise side of the one-way arm 5 abuts against the stop point 25. When the seat frame A moves backward to return to its original position, it can drive the one-way arm 5 to push the locking hook assembly 2 to rotate clockwise, thereby separating the linkage pin 12 from the locking edge 21 and releasing the lifting and holding of the seat frame A. At this time, the positioning tension spring 3 is located below the locking hook assembly shaft 22. It has a spring force to drive the locking hook assembly 2 to rotate clockwise. Under this spring force, the clockwise side of the locking hook assembly 2 abuts against the tension spring fixing pin 8, thereby fixing the locking hook assembly 2 in the open position. At this time, pressing down on the seat frame A can realize the reset of the seat frame A. When the seat frame A resets downward, it can drive the front shaft connecting rod 1 to rotate clockwise, thereby driving the locking mechanism return contact edge 13 to push the return pin 23 downward, thereby realizing the locking hook assembly 2 returning from the open position to the designed position.

[0033] That is, during the process of pushing the return pin 23 downward, the return contact edge 13 of the locking mechanism can cause the positioning spring 3 to pass over the axis of the locking hook assembly shaft 22 (moving from above the locking hook assembly shaft 22 to below it), so as to change the direction of the elastic force of the positioning spring 3, so as to pull the locking hook assembly 2 back to the design position through the elastic force of the positioning spring 3.

[0034] In summary, the automatic unlocking is triggered when seat frame A moves forward and then returns to its original position, eliminating the need for manual operation and improving the user experience. Furthermore, when seat frame A is pressed down, the locking hook assembly 2 automatically resets via the linkage between the front pivot connecting rod 1 and the return pin 23, further simplifying the operation. It should be noted that when the weight of seat frame A is sufficient to drive it to reset, the downward pressure applied to seat frame A is unnecessary. After seat frame A resets, the floor lock engages to secure it.

[0035] The tension spring retaining pin 8 has a dual function: it serves to fix and position the tension spring 3, and at the same time, it acts as a limit point for the locking hook assembly 2 to be held in the design position and the open position, eliminating the need for additional limiting structures (such as independent stops) and simplifying the mechanical design.

[0036] Ideally, one end of the positioning tension spring 3 is hooked and fixed to the tension spring fixing pin 8, and the other end is hooked and fixed to the return pin 23 of the locking hook assembly 2. This structure is simple, easy to assemble, and helps to reduce the number of parts.

[0037] Ideally, the quick-access stop pin 6 is fixed to the outer slide rail C by a mounting bracket 61. The mounting bracket 61 is L-shaped, fits against the outer surface of the outer slide rail C, and is snapped onto the outer slide rail C by a snap-fit ​​structure. The quick-access stop pin 6 is fixed to the mounting bracket 61. This structure makes the quick-access stop pin 6 easy to install and remove, facilitating subsequent maintenance and replacement.

[0038] Ideally, the pivot connecting rod 1, locking hook assembly 2, one-way arm 5, and quick-release shift pin 6 are all arranged on the side of the slide rail front bracket 7 near the seat interior, thus hiding them under the seat frame A. This makes full use of the unused space under the seat, avoids the components occupying other areas of the vehicle interior, avoids the impact of exposed structures on the overall appearance of the seat, and makes the seat appearance more concise and streamlined.

Claims

1. A middle-row seat lifting and retaining structure, comprising a seat frame (A) and a slide rail assembly, the slide rail assembly comprising an inner slide rail (B) and an outer slide rail (C), wherein a sliding locking mechanism is provided between the two, the bottom front end of the seat frame (A) is hinged to the inner slide rail (B), and the bottom rear end of the seat frame (A) is locked and fixed to the inner slide rail (B) by a floor lock, characterized in that: The seat frame (A) has a front pivot connecting rod (1) at its bottom front end. The inner slide rail (B) has a locking hook assembly (2) corresponding to the front pivot connecting rod (1). The inner slide rail (B) and the outer slide rail (C) have a lifting and holding release mechanism (D). When the floor lock is unlocked, the seat frame (A) is lifted upward around the hinge point between its front end and the inner slide rail (B), which can drive the front pivot connecting rod (1) to engage in the locking hook assembly (2), thereby achieving the lifting and holding of the seat frame (A). When the sliding locking mechanism is unlocked, the seat frame (A) can always maintain the lifted state when it moves forward. When the seat frame (A) moves backward back to its original position, it can drive the lifting and holding release mechanism (D) to move, thereby driving the front pivot connecting rod (1) to separate from the locking hook assembly (2), thereby achieving the lifting and holding release of the seat frame (A). At this time, pressing down on the seat frame (A) can achieve the reset of the seat frame (A).

2. The middle row seat lifting and retaining structure according to claim 1, characterized in that: The slide rail assembly includes two sets of symmetrically arranged inner slide rails (B) and outer slide rails (C). Each inner slide rail (B) is provided with a front slide rail bracket (7). The bottom front end of the seat frame (A) is provided with a front pivot (11). The front pivot (11) is hinged between the two front slide rail brackets (7), thereby realizing the hinge connection between the bottom front end of the seat frame (A) and the inner slide rail (B).

3. The middle row seat lifting and retaining structure according to claim 2, characterized in that: The middle part of the locking hook assembly (2) is hinged to one side of the slide rail front bracket (7) via the locking hook assembly pivot (22). The slide rail front bracket (7) is provided with a tension spring fixing pin (8). A positioning tension spring (3) is provided between the tension spring fixing pin (8) and the locking hook assembly (2). The positioning tension spring (3) is located below the locking hook assembly pivot (22) and has a spring force that drives the locking hook assembly (2) to rotate counterclockwise. Under this spring force, the counterclockwise side of the locking hook assembly (2) abuts against the tension spring fixing pin (8), thereby fixing the locking hook assembly (2) on the slide rail front bracket (7). Design position; the locking hook assembly (2) is also provided with a locking edge (21) and a return pin (23). The front rotating shaft connecting rod (1) is inverted U-shaped, and its top end is fixed on the front rotating shaft (11). One side of its lower end is provided with a linkage pin (12) corresponding to the locking edge (21), and the other side of its lower end is provided with a locking mechanism return contact edge (13) corresponding to the return pin (23). When the seat frame (A) is raised, it can drive the front rotating shaft connecting rod (1) to rotate counterclockwise, thereby driving the linkage pin (12) to be engaged in the locking edge (21), thereby realizing the lifting and holding of the seat frame (A).

4. The middle row seat lifting and retaining structure according to claim 3, characterized in that: The lifting and holding release mechanism (D) includes a one-way arm (5) and a quick-access stop pin (6). The upper end of the one-way arm (5) is hinged to the lower end of the locking hook assembly (2) via a one-way arm pivot (24), and a one-way arm torsion spring (4) is provided between the one-way arm and the locking hook assembly (2). The one-way arm torsion spring (4) has a torque to drive the one-way arm (5) to be held in the design position. The quick-access stop pin (6) is fixed on the outer wall of the front end of the outer slide rail (C). When the sliding locking mechanism is unlocked, the seat frame (A) moves forward, and the one-way arm (5) can abut against the quick-access stop pin (6) and be pushed to rotate counterclockwise until it passes the quick-access stop pin (6). After passing the quick-access stop pin (6), the one-way arm (5) can return to the design position under the action of the one-way arm torsion spring (4). The locking hook assembly (2) is provided with a stop point (25). The one-way arm (5) abuts against the stop point (25) on one side in the clockwise direction. When the seat frame (A) moves back to its original position, it can drive the one-way arm (5) to push the locking hook assembly (2) to rotate clockwise, thereby separating the linkage pin (12) from the locking edge (21) and releasing the lifting and holding of the seat frame (A). At this time, the positioning tension spring (3) is located below the rotating shaft (22) of the locking hook assembly, and it has the function of driving the locking hook assembly (2) to rotate clockwise. The elastic force causes the clockwise side of the locking hook assembly (2) to abut against the tension spring fixing pin (8), thereby fixing the locking hook assembly (2) in the open position. At this time, pressing down the seat frame (A) can reset the seat frame (A). When the seat frame (A) resets downward, it can drive the front rotating shaft connecting rod (1) to rotate clockwise, thereby driving the locking mechanism return contact edge (13) to push the return pin (23) downward, thus realizing the locking hook assembly (2) returning from the open position to the design position.

5. The middle row seat lifting and retaining structure according to claim 3, characterized in that: One end of the positioning tension spring (3) is hooked and fixed to the tension spring fixing pin (8), and the other end is hooked and fixed to the return pin (23) of the locking hook assembly (2).

6. The middle row seat lifting and retaining structure according to claim 4, characterized in that: The quick-entry / exit stop pin (6) is fixed to the outer slide rail (C) by the mounting bracket (61). The mounting bracket (61) is attached to the outer surface of the outer slide rail (C) and is snapped onto the outer slide rail (C) by a snap-fit ​​structure. The quick-entry / exit stop pin (6) is fixed on the mounting bracket (61).

7. The middle row seat lifting and retaining structure according to claim 6, characterized in that: The pivot connecting rod (1), locking hook assembly (2), one-way arm (5) and quick-access stop pin (6) are all arranged on the side of the slide rail front bracket (7) near the inside of the seat, thus being hidden under the seat frame (A).

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