A type of seat and its multi-row seat assembly

Abstract

This utility model relates to a seat, including a base, a backrest frame, a seat cushion frame, and an adjustment mechanism. The adjustment mechanism is configured to allow the seat to switch between a sitting state and a table state. The adjustment mechanism includes a linkage assembly connecting the seat cushion frame and the base, the linkage assembly including a front linkage and a rear linkage. The front linkage is hinged to both the seat cushion frame and the base, forming upper and lower hinge points. The rear linkage is also hinged to both the seat cushion frame and the base, forming upper and lower hinge points. When the seat is in the table state, at least one of the upper hinge points of the front and rear linkages is closer to the front of the seat than its lower hinge point. This utility model also relates to a multi-row seat assembly. The seat and its multi-row seat assembly according to this utility model not only meet basic seating needs but can also be quickly converted into a table or other uses when needed, meeting different usage scenarios and achieving multifunctionality and flexibility.

Description

Technical Field

[0001] This utility model relates to vehicles, and more specifically to a seat and a multi-row seat assembly thereof. Background Technology

[0002] In modern transportation, especially in multi-purpose vehicles (MPVs) and commercial vehicles, seat design must not only meet basic seating comfort but also possess multiple functions to adapt to different usage scenarios. Traditional seat designs typically only fulfill a single seating function, lacking the flexibility to adjust the seat layout and purpose. For example, during family trips, business receptions, or long journeys, passengers may require more space for placing items, resting, or interacting. Therefore, developing a seat structure that can flexibly adjust its layout and possess multiple functions has become an important technological requirement. Utility Model Content

[0003] To address the problem of limited functionality in existing seats, this invention provides a seat and a multi-row seat assembly thereof.

[0004] The chair according to this utility model includes a base, a backrest frame, a seat cushion frame, and an adjustment mechanism; the adjustment mechanism is configured to switch the chair between a sitting state and a table state; the adjustment mechanism includes a linkage assembly connecting the seat cushion frame and the base, the linkage assembly including a front linkage and a rear linkage; the front linkage is hinged to the seat cushion frame and the base to form upper and lower hinge points respectively; the rear linkage is hinged to the seat cushion frame and the base to form upper and lower hinge points respectively; when the chair is in the table state, at least one of the upper hinge points of the front linkage and the rear linkage is closer to the front of the chair than its lower hinge point.

[0005] In a preferred embodiment, the adjustment mechanism further includes a first angle adjuster connected between the seat cushion frame and the backrest frame, the first angle adjuster being configured to allow the backrest frame to be flipped to a folded state relative to the seat cushion frame; when the seat is in the table-like state, the backrest frame is in the folded state.

[0006] In a preferred embodiment, the base is provided with a stop point, which is configured to abut against the front link and / or the rear link when the seat frame is raised to its highest position under the action of the linkage assembly, thereby limiting the pivot angle of the linkage assembly.

[0007] In a preferred embodiment, the length of the rear link is greater than the length of the front link, and the upper hinge point of the front link is higher than the upper hinge point of the rear link when the user is seated.

[0008] In a preferred embodiment, the adjustment mechanism further includes a drive mechanism, which includes a lifting motor that directly or indirectly drives the front link or the rear link to rotate.

[0009] In a preferred embodiment, the driving mechanism further includes a fixing member fixedly connected to the front link or the rear link, the fixing member having a shaped hole, and the lifting motor having a shaped shaft adapted to the shaped hole, so that the lifting motor directly drives the front link or the rear link to rotate relative to the base.

[0010] In a preferred embodiment, a gap-eliminating structure is provided between the connecting rod assembly and the base to eliminate the gap between the output shaft and the motor body caused by the shaking of the lifting motor.

[0011] In a preferred embodiment, the gap-eliminating structure includes a positive leaf spring and a negative leaf spring with opposite force directions; during the lifting process of the four-bar linkage, the positive leaf spring releases elastic energy to reduce the load on the lifting motor, and the negative leaf spring stores elastic energy to eliminate the gap; during the lowering process of the four-bar linkage, the positive leaf spring stores elastic energy to eliminate the gap.

[0012] In a preferred embodiment, the strength of the positive leaf spring is greater than the strength of the negative leaf spring.

[0013] In a preferred embodiment, the adjusting mechanism further includes a second angle adjuster, and the front link and / or the rear link are pivotally connected to the base via the second angle adjuster. In a preferred embodiment, the output shaft of the lifting motor is drively connected to the second angle adjuster to drive the front link or the rear link to rotate relative to the base. In a preferred embodiment, the second angle adjuster is a manual angle adjuster.

[0014] In a preferred embodiment, a locking wire is installed on one of the seat frame and the base, and at least one lock is installed on the other of the seat frame and the base, the locking hook of which engages the locking wire in the initial state to limit the riding state.

[0015] In a preferred embodiment, an elastic buffer is fixedly provided on the seat cushion frame and / or the base. When the seat cushion frame contacts the base, the elastic buffer is compressed to eliminate the contact gap between the seat cushion frame and the base.

[0016] According to the present invention, a multi-row seat assembly includes a second row of seats and a rear row of seats, wherein the rear row of seats includes the aforementioned seats.

[0017] In a preferred embodiment, the seat is a rear two-seat unit, with its base mounted on a slide rail, which is mounted on the vehicle floor.

[0018] In a preferred embodiment, the seat serves as an armrest for rear passengers when in a table-like configuration.

[0019] In a preferred embodiment, the seat, in its table-like state, is moved via a slide rail to the middle of the second row of seats to serve as a table for the front row passengers.

[0020] In a preferred embodiment, the second-row seats face the rear seats, and the seats, when in a table-like state, are moved via a slide rail to the middle of the second-row seats and the rear seats to serve as a table for the front and rear passengers.

[0021] The seat and its multi-row seat assembly according to this utility model realize the lifting and tilting movement of the seat through a four-bar linkage mechanism, ensuring stability and reliability. It can not only meet the basic seating needs, but also be quickly converted into a table or other uses when needed, meeting different usage scenarios and realizing multifunctionality and flexibility. Attached Figure Description

[0022] Figure 1 The initial state of a multi-row seat assembly according to a preferred embodiment of the present invention is shown.

[0023] Figure 2 This illustrates a first use scenario of a multi-row seat assembly according to a preferred embodiment of the present invention.

[0024] Figure 3 yes Figure 2 Top view.

[0025] Figure 4 This illustrates a second usage scenario of a multi-row seat assembly according to a preferred embodiment of the present invention.

[0026] Figure 5 yes Figure 4 Top view.

[0027] Figure 6 yes Figure 4 Side view.

[0028] Figure 7 This shows the seating position of the middle seat in the third row.

[0029] Figure 8 This shows the middle seat in the third row with the table in place.

[0030] Figure 9 Corresponding to Figure 7 The specific structure of the middle seat in the third row is shown.

[0031] Figure 10 Corresponding to Figure 8 The specific structure of the middle seat in the third row is shown.

[0032] Figure 11 This is a schematic diagram of the overall structure of the middle seat in the third row.

[0033] Figure 12 yes Figure 11 Axonometric view of a four-bar linkage.

[0034] Figure 13 yes Figure 12 Exploded view.

[0035] Figure 14 yes Figure 11 An assembly diagram of the drive mechanism.

[0036] Figure 15 The rear connecting rod is shown to stop at a stop point.

[0037] Figure 16 Show Figure 11 The gap-free structure.

[0038] Figure 17 yes Figure 16 Exploded view.

[0039] Figure 18 and Figure 19 The installation of the leaf spring is shown.

[0040] Figure 20 yes Figure 14 A first structural schematic diagram of an alternative to direct-drive motor.

[0041] Figure 21 yes Figure 20 A structural diagram from another angle.

[0042] Figure 22 yes Figure 11 A schematic diagram of the silencing mechanism.

[0043] Figure 23 yes Figure 22 A magnified view of a portion of the image.

[0044] Figure 24 yes Figure 11 A schematic diagram of the locking mechanism.

[0045] Figure 25 Show Figure 24 The locked and unlocked states of the lock.

[0046] Figure 26 Show Figure 24 The specific installation structure of the lock.

[0047] Figure 27 This illustrates the movement principle of the middle seat in the third row.

[0048] Figure 28 yes Figure 27 A simplified diagram. Detailed Implementation

[0049] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0050] In the following text, the longitudinal direction X corresponds to the front-to-back direction of the vehicle's normal driving direction, the lateral direction Y corresponds to the left-to-right direction perpendicular to the vehicle's normal driving direction, and the vertical direction Z corresponds to the height direction perpendicular to the vehicle.

[0051] The multi-row seat assembly of this utility model is applicable to MPV (Multi-Purpose Vehicle) models and includes three rows of seats spaced apart in the X direction. The first row of seats consists of a driver's seat and a front passenger seat. The second row of seats includes two seats spaced apart in the Y direction. The third row of seats includes three seats, which can accommodate more passengers and is suitable for family or group travel.

[0052] like Figure 1 As shown, in the initial state, the three seats in the third row are arranged side by side in the Y direction, in a normal seating position.

[0053] like Figure 2 and Figure 3 As shown, in the first usage scenario, the middle seat of the third row moves forward along the X direction between the two seats of the second row, unfolding to form a table for use by second-row passengers. This layout is particularly suitable for scenarios where second-row passengers need to use the table for work, dining, or entertainment.

[0054] like Figures 4-6 As shown, in the second usage scenario, the two seats in the second row rotate 180° backward to face the third row. The middle seat in the third row moves forward along the X-axis between the second and third rows, unfolding to form a table for simultaneous use by passengers in both rows. This layout is particularly suitable for family or group travel where passengers need to communicate face-to-face or share a table.

[0055] Thus, the multi-row seat assembly of this utility model, through its flexible seat layout and movement mechanism, can meet the usage needs of MPV models in various scenarios such as family, business and travel, demonstrating its versatility and flexibility.

[0056] Specifically, the middle seat S in the third row can be adjusted to either a seated position or a table position. Figure 7 As shown, in the seating position, the middle passenger is seated normally in the middle seat. Figure 8As shown, in the table configuration, passengers on both sides sit normally on their respective seats. The backrest of the middle seat folds down and rises forward and upward to form a horizontal table. The height of the table is higher than the thigh height of the passengers on both sides. It can function as a table as described above, or it can be moved in the X direction to serve as a large armrest for the passengers on both sides, offering good comfort and versatility. It should be understood that the middle seat S in the third row is also referred to as a two-part seat, and the seats on either side of the two-part seat are referred to as four-part seats. This embodiment only uses the two-part seat as an example for illustration, but its corresponding functions can actually be performed by the four-part seats.

[0057] The following describes in detail the specific structure of the middle seat S in the third row.

[0058] like Figures 9-10 As shown, the middle seat S includes a backrest frame 1, a seat cushion frame 100, an adjustment mechanism, a base 300, and a slide rail 14. The base 300 is mounted on the vehicle floor and can move forward and backward along the X direction via the slide rail 14, allowing the seat to be adjusted within the vehicle. The seat cushion frame 100 is mounted on the base 300 via a linkage assembly 200, forming a four-bar linkage for achieving the seat's lifting and tilting movements. The backrest frame 1 is rotatably mounted on the seat cushion frame 100 to facilitate backrest folding.

[0059] In one embodiment, the tabletop is provided directly by the back panel of the backrest frame 1, which is designed as a flat desktop. In another embodiment, the tabletop includes a main board and an extension board, with the back panel of the backrest frame 1 providing the main board or fixedly connected to it. The extension board can be implemented in various ways. For example, two flaps are hinged to both sides of the main board, opening when in use to form a larger flat surface with the main board. Alternatively, at least one sliding plate is integrated inside the main board, sliding out from the side of the main board via a track groove to increase the desktop area. Yet another example is at least one flat panel stacked above or below the main board, forming a flat surface with the main board when in use, thus creating a large tabletop.

[0060] like Figure 11As shown, the seat cushion frame 100 includes two seat cushion side plates 5, two connecting plates 18, and a seat cushion anti-submarine tube 19. The two seat cushion side plates 5 are spaced apart from each other along the Y direction on both sides of the seat, forming the basic structure of the seat. The seat cushion anti-submarine tube 19 is fixedly connected to the front side of the two seat cushion side plates 5 to enhance the structural strength and safety of the seat. In this embodiment, the seat cushion side plates 5 and the seat cushion anti-submarine tube 19 are fixedly connected by welding. The two connecting plates 18 are respectively fixedly connected to the rear side of the seat cushion side plates 5 by bolts. A first angle adjuster 3 is installed on the connecting plate 18 to realize the folding function of the backrest frame 1 relative to the seat cushion frame 100. The folding motor 2 is installed on the inner side of the backrest frame 1 and connected to the first angle adjuster 3 to drive the folding action of the backrest frame 1. The first angle adjuster 3 is configured to allow the backrest frame 1 to be flipped to a folded state relative to the seat cushion frame 100; when the seat is in a table-like state, the backrest frame 1 is in the folded state.

[0061] like Figure 11 As shown, the base 300 provides stable support and includes two first supports 10, a first support tube 20, two second supports 11, and a second support tube 21. The two first supports 10 are spaced apart from each other along the Y-direction on the front side of the seat, forming the front support structure of the base. The first support tube 20 is fixedly connected between the two first supports 10 to enhance the structural strength and stability of the base. In this embodiment, the first supports 10 and the first support tube 20 are fixedly connected by welding. The two second supports 11 are spaced apart from each other along the Y-direction on the rear side of the seat, forming the rear support structure of the base. The second support tube 21, fixedly connected between the two second supports 11, also enhances the structural strength and stability of the base. In this embodiment, the second supports 11 and the second support tube 21 are also fixedly connected by welding.

[0062] like Figure 11 As shown, the linkage assembly 200 includes a pair of front links 8 and a pair of rear links 9. Figure 12 As shown, the two ends of the front link 8 are rotatably connected to the front sides of the first bracket 10 and the seat cushion side plate 5, forming two hinge points at the top and bottom. The two ends of the rear link 9 are rotatably connected to the rear sides of the first bracket 10 and the seat cushion side plate 5, forming two hinge points at the top and bottom, thus forming a four-bar linkage. This connection method allows the link assembly 200 to effectively transmit motion, realizing the seat's lifting and tilting functions. In this embodiment, the two ends of the front link 8 and the rear link 9 are respectively hinged to the first bracket 10 and the seat cushion side plate 5 via stepped bolts. Specifically, as... Figure 13As shown, three welding nuts 43 are welded and fixed to the inner sides of the first bracket 10 and the seat cushion side plate 5. Bolts 42 pass through the front connecting rod 8 or the rear connecting rod 9 and the first bracket 10 or the seat cushion side plate 5 in sequence, and are then assembled with the welding nuts 43. This connection method not only ensures the stability of the connecting rod assembly 200, but also facilitates installation and maintenance. In this embodiment, the bushing 38 is inserted into the mounting hole of the front connecting rod 8 or the rear connecting rod 9 to reduce friction between moving parts and extend service life. In particular, when the seat is in the table-like state, the upper hinge point of at least one of the front connecting rod 8 and the rear connecting rod 9 is closer to the front of the seat than its lower hinge point, making the backrest frame 1 extend further forward in the table-like state and closer to the second row of seats. This is beneficial for meeting multi-functional usage scenarios, such as when the second row of seats is flipped backward, the seat in the table-like state can be used more conveniently as a table.

[0063] The adjustment mechanism also includes the drive mechanism of the four-bar linkage, which can have various drive methods, such as direct motor drive, motor and angle adjuster drive, and motor, gear plate and push rod drive, etc. These different drive methods each have their own characteristics and applicable scenarios.

[0064] Let's combine the following... Figures 11 to 19 Let's introduce the direct drive method of the lifting motor 6. The seat lifting and adjustment functions are achieved by directly driving the linkage assembly with the motor. This method offers advantages such as fast response, high adjustment precision, compact structure, and the ability to achieve large-angle adjustments.

[0065] like Figure 11 As shown, the lifting motor 6 is fixedly connected to the inner side of one of the first brackets 10 by bolts. Specifically, as... Figure 14 As shown, three projection-welded nuts 27 are welded and fixed to the inner side of the lifting motor 6. Bolts 24 pass sequentially through the first bracket 10, bushing 26, and the mounting plate of the lifting motor 6 before being assembled with the projection-welded nuts 27, thus firmly fixing the lifting motor 6 to the first bracket 10. A fixing member 23 is welded and fixed to the front end of the rear connecting rod 9, and the fixing member 23 has a shaped hole. The shaft of the lifting motor 6 is torsionally connected to the fixing member 23 through the shaped hole, and the rotation of the shaft of the lifting motor 6 drives the rear connecting rod 9 to move. The movement of the rear connecting rod 9 further drives the seat cushion side plate 5 to move, and the front connecting rod 8 follows suit, thereby lifting the seat cushion forward and upward. In this embodiment, nuts 22 are threaded onto the top of the shaft of the lifting motor 6 on the leaf spring shaft 37 to prevent the shaft of the lifting motor 6 from dislodging. In this embodiment, the fixing member 23 is a spline nut, which is only an example and not a limitation. It should be understood that the fastener 23 can be omitted, and it is also feasible to directly open a special-shaped hole on the front link 8 or the rear link 9 to match the shaft of the lifting motor 6, as long as the front link 8 or the rear link 9 can be driven by the lifting motor 6.

[0066] like Figure 12As shown, the stop point 35 is fixedly connected to the outside of the first bracket 10 by welding. When the rear connecting rod 9 hits the stop point 35, as... Figure 15 As shown, the forward and upward lifting motion of the seat cushion stops, and the seat cushion is raised to its highest horizontal position. It should be understood that the abutment between the rear link 9 and the stop point 35 here is only an example and not a limitation. It is also feasible for the stop point 35 on the base 300 to abut against the front link 8 to limit the pivot angle of the link assembly 200.

[0067] like Figure 16 As shown, on the opposite side from the lifting motor 6, a gap-eliminating structure is connected between the rear connecting rod 9 and the first bracket 10. This structure is used to eliminate the gap between the output shaft and the motor body caused by the swaying of the lifting motor 6. It should be understood that the gap-eliminating structure is not limited to the position shown in the figure; all four hinge points can be arranged as needed, and the gap-eliminating structure can use elastic elements such as leaf springs or torsion springs as required. In this embodiment, combined with... Figure 17 The gap-eliminating structure includes a nut 22, a bushing 25, a forward leaf spring 36, a leaf spring shaft 37, a washer 38, a reverse leaf spring 39, and a coil spring stop 40. The spline nut 23 is welded and fixed to the rear connecting rod 9. The coil spring stop 40 is welded and fixed to one side of the first bracket 10. The bushing 25 is riveted and installed in the mounting hole of the first bracket 10. The leaf spring shaft 37 is inserted into the bushing 25 and rotatably mounted on the first bracket 10. The first ends of the forward leaf spring 36 and the reverse leaf spring 39, separated by the washer 38, are respectively mounted on the locking grooves in the middle of the first end of the leaf spring shaft 37. The second ends 36a and 39a of the forward leaf spring 36 and the reverse leaf spring 39 are respectively mounted on the opposite ends of the coil spring stop 40 (see...). Figure 18 and Figure 19 Nut 22 is threaded onto the second end of leaf spring shaft 37 to prevent it from coming off.

[0068] The forward leaf spring 36 and the reverse leaf spring 39 exert forces in opposite directions. The width of the forward leaf spring 36 is greater than that of the reverse leaf spring 39, resulting in a greater strength for the forward leaf spring 36 than for the reverse leaf spring 39. During the upward lifting of the rear connecting rod 9, the leaf spring shaft 37 rotates with the rear connecting rod 9, causing the reverse leaf spring 39 to gradually tighten and the forward leaf spring 36 to gradually relax and release elastic energy. Because the strength of the forward leaf spring 36 is greater than that of the reverse leaf spring 39, the forward leaf spring 36 provides assistance during the lifting phase of the connecting rod, thereby reducing the burden on the lifting motor 6. At the lowest position, the forward leaf spring 36 reaches its minimum force state, while the reverse leaf spring 39 reaches its maximum force state, with the reverse leaf spring 39 eliminating wobbling clearance. Conversely, during the downward return of the rear connecting rod 9, the reverse leaf spring 39 gradually relaxes, while the forward leaf spring 36 gradually tightens to store elastic energy. At the highest position, the forward leaf spring 36 reaches the maximum force state, and the reverse leaf spring 39 reaches the minimum force state. The forward leaf spring 36 plays the role of eliminating the swaying gap.

[0069] Specifically, the four-bar linkage forms a cantilever-like structure after being lifted, and the locking stability required by the four-bar linkage is provided by the self-locking function of the lifting motor 6, the stop point 35, and the leaf springs 36 and 39.

[0070] The following is combined with Figures 20-21 This section introduces the driving method of the lifting motor 6, which is implemented using an angle adjuster. Compared with direct motor drive, the angle adjuster driving method can achieve a stronger locking force, making it suitable for scenarios requiring higher stability and safety.

[0071] like Figures 20-21As shown, the two rear connecting rods 9 are rotatably mounted on the two first brackets 10 via two second angle adjusters 23a. The two second angle adjusters 23a are synchronized via a synchronizing rod 23b to ensure coordinated movement of the connecting rods on both sides. Additionally, thrust caps 23c are mounted from the outside at both ends of the synchronizing rod 23b to prevent them from coming loose. In this embodiment, the lifting motor 6 is not directly mounted to the inside of one of the first brackets 10 via screws, but rather via a motor mounting bracket 6a. This mounting method provides better stability and adjustment flexibility. Furthermore, the first bracket 10 has a first stop point 35a and a second stop point 35b, and the second angle adjuster 23a is fitted with a first corresponding stop point 231a and a second corresponding stop point (not shown in the figure), which limit the forward and backward rotation range of the rear connecting rod 9, ensuring the accuracy and reliability of the connecting rod movement. Thus, the lifting motor 6 indirectly drives the rear connecting rod 9 to rotate relative to the base 300 via the through-penetrating synchronizing rod 23b and the second angle adjuster 23a. It should be understood that the structure of the indirect drive front linkage is the same as that of the drive rear linkage, both being connected to the angle adjuster via a synchronizing rod, and will not be elaborated further here. Moreover, the above-described method of driving the second angle adjuster 23a via the lifting motor 6 is merely an example and not a limitation; the second angle adjuster 23a can be configured as a manual angle adjuster.

[0072] like Figure 22 As shown, the front and rear portions of the seat cushion side panel 5 are respectively equipped with a first rubber stud 15 and a second rubber stud 16. Simultaneously, a first rubber pad 29 is installed on the first bracket 10, and a second rubber pad 17 is installed on the second bracket 11. Figure 1 In the initial state shown, the first rubber stud 15 is in contact with the first rubber pad 29, and the second rubber stud 16 is in contact with the second rubber pad 17, thereby effectively eliminating the gaps and wobbling problems of the seat in the initial state and enhancing the strength and stability of the seat. When the seat cushion is lifted, the first rubber stud 15 and the second rubber stud 16 move with the seat cushion and disengage from the first rubber pad 29 and the second rubber pad 17.

[0073] Specifically, such as Figure 23As shown, the first rubber stud 15 is bolted to the front side of the seat cushion side plate 5. The second rubber stud 16 is bolted to the rear side of the seat cushion side plate 5. Two mounting brackets 28 are welded and fixed to the top of the first support tube 20 at a distance from each other, and each mounting bracket 28 is equipped with a first rubber pad 29. The second rubber pad 17 is mounted at both ends of the second support tube 21. In this embodiment, the rubber studs 15, 16 and the rubber pads 17, 29 are made of highly elastic material, which can maintain good performance during long-term use, not only improving the stability of the seat but also reducing noise and enhancing the passenger's riding experience. It should be understood that the rubber studs 15, 16 and the rubber pads 17, 29 are only examples of elastic buffers and not limitations. The elastic buffers can also be fixedly installed at a desired position on one of the seat cushion frame 100 and the base 300. When the seat cushion frame 100 contacts the base 300, the elastic buffer can be compressed to eliminate the contact gap between the seat cushion frame 100 and the base 300.

[0074] like Figure 12 As shown, the locking wire 13 is welded and fixed to the connecting plate 18. Figure 24 As shown, lock 4 is fixedly connected to the second bracket 11 by bolts. Lock 4 engages with locking wire 13 via locking hook 41 to lock the seat cushion frame 100 to the base 300, thereby achieving the locking function and preventing the seat from detaching during a collision. It should be understood that the positions of locking wire 13 and lock 4 can be interchanged as needed; that is, locking wire 13 can be installed on the base 300, while lock 4 can be installed on the seat cushion frame 100. In this embodiment, two locks 4 are fixedly connected to two second brackets 11 respectively to increase the locking strength. However, a single lock 4 is sufficient to achieve the locking function; therefore, two locks 4 are only used as an example and not as a limitation.

[0075] Specifically, such as Figure 26 As shown, two projection-welded nuts 34 are welded and fixed to the outside of the pull cable bracket 32. Two bolts 31 pass through the second bracket 11, the lock 4, and the pull cable bracket 32 ​​respectively, and are then assembled with the projection-welded nuts 34. The pull cable assembly 33, including the pull cable guide 30 and the pull cable wire extending within it, is mounted via the pull cable bracket 32. Figure 24 As shown, the unlocking motor 7 is bolted to the inner side of the first bracket 10 and connected to the pull wire to drive the locking hook 41. Figure 25 As shown, by opening the locking hook 41 in the direction of the pulling force F, the locking wire 13 can be released.

[0076] like Figures 27-28As shown, the process of transforming the middle seat of the third row from a seated position to a table position first involves folding the backrest. The folding motor 2 drives the adjuster 3 to rotate, causing the backrest to fold. This process is achieved by the folding motor 2 driving the adjuster 3, ensuring the backrest can be smoothly folded to the desired position. The next step in transforming the middle seat of the third row from a seated position to a table position involves extending the seat cushion forward. After the backrest is folded, the unlocking motor 7 operates, unlocking the lock 4 and releasing the seat cushion's locking position. Subsequently, the lifting motor 6 drives the four-bar linkage to lift the seat forward and upward, ultimately reaching the table position. In this embodiment, in the seated position, the rear side of the seat cushion is slightly lower than the front side, contributing to passenger comfort. The length of the rear link 9 is greater than the length of the front link 8, and in the seated position, the upper hinge point of the front link 8 is higher than the upper hinge point of the rear link 9, causing the seat cushion frame to tilt backward to ensure seating comfort. Moreover, the front link 8 being shorter than the rear link 9 reduces the space occupied by the mechanism in the X and Z directions. Meanwhile, the fact that the length of the rear link 9 is greater than the length of the front link 8 helps ensure that the backrest panel remains flush when the table is in its assembled state, forming a stable desktop. It should be understood that the rotation center of the angle adjuster 3, the rotation center of the four-bar linkage, and the lengths of links 8 and 9 can all be adjusted as needed, as long as they are matched to ensure that the backrest panel remains flush when the table is in its assembled state.

[0077] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. That is, all simple and equivalent changes and modifications made based on the claims and description of this utility model fall within the protection scope of the claims of this utility model. Any aspects not described in detail in this utility model are conventional technical content.

Claims

1. A seat, characterized in that, The seat includes a base (300), a backrest frame (1), a seat cushion frame (100), and an adjustment mechanism; The adjustment mechanism is configured to allow the seat to switch between a seated position and a table position; The adjustment mechanism includes a linkage assembly (200) connecting the seat frame (100) and the base (300), the linkage assembly (200) including a front link (8) and a rear link (9). The front link (8) is hinged to the seat frame (100) and the base (300) to form two hinge points, one above the other; The rear connecting rod (9) is hinged to the seat frame (100) and the base (300) to form two hinge points, one above the other; When the seat is in the table position, the upper hinge point of at least one of the front link (8) and the rear link (9) is closer to the front of the seat than its lower hinge point.

2. The seat of claim 1, wherein The adjustment mechanism further includes a first angle adjuster (3) connected between the seat cushion frame (100) and the backrest frame (1), the first angle adjuster (3) being configured to allow the backrest frame (1) to be flipped to a folded state relative to the seat cushion frame (100); when the seat is in a table-like state, the backrest frame (1) is in the folded state.

3. The seat of claim 1, wherein The base (300) is provided with a stop (35), which is configured to abut against the front link (8) and / or the rear link (9) when the seat frame (100) is raised to the highest position under the action of the link assembly (200) to limit the pivot angle of the link assembly (200).

4. The seat of claim 1, wherein The length of the rear link (9) is greater than the length of the front link (8), and the upper hinge point of the front link (8) is higher than the upper hinge point of the rear link (9) when in a riding position.

5. The seat of claim 1, wherein, The adjustment mechanism also includes a drive mechanism, which includes a lifting motor (6) that directly or indirectly drives the front link (8) or the rear link (9) to rotate.

6. The seat of claim 5, wherein, The drive mechanism also includes a fixing member (23) fixedly connected to the front link (8) or the rear link (9). The fixing member (23) is provided with a special-shaped hole, and the lifting motor (6) is provided with a special-shaped shaft that matches the special-shaped hole, so that the lifting motor (6) directly drives the front link (8) or the rear link (9) to rotate relative to the base (300).

7. The seat of claim 6, wherein A gap-eliminating structure is provided between the connecting rod assembly (200) and the base (300) to eliminate the gap between the output shaft and the motor body caused by the shaking of the lifting motor (6).

8. The seat of claim 7, wherein, The gap-eliminating structure includes a positive leaf spring (36) and a negative leaf spring (39) with opposite force directions. During the lifting process of the four-bar linkage, the positive leaf spring (36) releases elastic energy to reduce the burden on the lifting motor (6), and the negative leaf spring (39) stores elastic energy to eliminate the gap. During the lowering process of the four-bar linkage, the positive leaf spring (36) stores elastic energy to eliminate the gap.

9. The seat of claim 8, wherein, The strength of the forward leaf spring (36) is greater than that of the reverse leaf spring (39).

10. The seat of claim 1, wherein, The adjustment mechanism further includes a second angle adjuster (23a), and the front link (8) and / or the rear link (9) are pivotally connected to the base (300) via the second angle adjuster (23a).

11. The seat of claim 1, wherein, A locking wire (13) is installed on one of the seat frame (100) and the base (300), and at least one lock (4) is installed on the other of the seat frame (100) and the base (300), the locking hook (41) of the lock (4) engaging the locking wire (13) in the initial state to limit the riding state.

12. The seat of claim 1, wherein, An elastic buffer is fixedly provided on the seat cushion frame (100) and / or the base (300). When the seat cushion frame (100) contacts the base (300), the elastic buffer is compressed to eliminate the contact gap between the seat cushion frame (100) and the base (300).

13. A multi-row seating assembly, characterized by, The multi-row seat assembly includes a second row of seats and a rear row of seats, the rear row of seats including seats according to any one of claims 1 to 12.

14. The multi-row seat assembly according to claim 13, wherein the seat is a rear two-seat unit, and its base (300) is disposed on a slide rail (14), the slide rail (14) being disposed on the vehicle floor.

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