Anti-shaking rear seat folding device for two-row seat of car

Abstract

This invention discloses an anti-sway car second-row seat backrest folding device, including a lower connecting plate, a positioning shaft connected to one side of the lower connecting plate, an upper connecting plate rotatably connected to both sides of the positioning shaft, a support column connected to one side of the upper connecting plate, a transmission plate rotatably mounted on the surface of the support column, a locking block connected to one side of the transmission plate, and a locking groove formed on one side of the lower connecting plate. An anti-sway mechanism is provided inside the lower connecting plate and the locking groove, and an unlocking mechanism is provided between the transmission plate and the upper connecting plate. This invention, by setting up an anti-sway mechanism composed of a clamping bolt and a positioning nut, rotates the clamping bolt so that its end directly presses against the transmission plate, forcing the locking block to tightly adhere to the inner wall of the locking groove. This effectively fills the tiny gaps caused by manufacturing tolerances or assembly errors, and through mechanical pre-tightening, fundamentally suppresses the large-scale swaying of the top of the backrest caused by the leverage effect.

Description

Technical Field

[0001] This invention relates to the field of automotive seat accessories technology, and more specifically, to an anti-sway automotive second-row seat back folding device. Background Technology

[0002] In modern automotive design, the folding function of rear seats has become a key feature for enhancing the flexibility and practicality of interior space. This function is typically achieved through a folding mechanism: the upper connecting plate of the folding mechanism is fixedly connected to the seat back, while the lower connecting plate is connected to the car seat frame. This allows the seat back to fold forward while also reliably locking it in the unfolded state to ensure passenger safety and comfort.

[0003] However, in existing technologies, some folding mechanisms exhibit wobbling during use. This is due to unavoidable manufacturing errors, stamping gaps, and assembly tolerances, resulting in a small but significant relative displacement space between the upper and lower connecting plates even in the locked state. Although this gap may be small at the connection point itself, the seat backrest has a certain height, and according to the lever principle, this small bottom gap is significantly amplified at the top of the backrest, manifesting as noticeable back-and-forth or side-to-side wobbling. This wobbling not only reduces the stability of the seat backrest, affecting the riding experience, but also causes abnormal noises due to continuous vibration during vehicle operation and accelerates the wear of connecting components. Long-term use may lead to loosening or even failure of the locking mechanism, thus posing a safety hazard.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] In view of the problems in the related technologies, the present invention proposes an adjustable friction pendulum isolation bearing to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by the present invention is as follows: An anti-sway car second-row seat back folding device includes a lower connecting plate, a positioning shaft connected to one side of the lower connecting plate, an upper connecting plate rotatably connected to both sides of the positioning shaft, a support column connected to one side of the upper connecting plate, a transmission plate rotatably mounted on the surface of the support column, a locking block connected to one side of the transmission plate, a locking groove opened on one side of the lower connecting plate, an anti-sway mechanism provided inside the lower connecting plate and the locking groove, and an unlocking mechanism provided between the transmission plate and the upper connecting plate.

[0007] Furthermore, in order to achieve the anti-shaking effect after the lower connecting plate and the upper connecting plate are locked, the anti-shaking mechanism includes a clamping bolt threaded on one side of the lower connecting plate. The clamping bolt passes through one side of the lower connecting plate and extends to the side of the transmission plate. A positioning nut is threaded on the clamping bolt. When the clamping bolt is rotated, its end can squeeze the transmission plate, so that the locking block is tightly attached to the inner wall of the locking groove, thereby eliminating the shaking caused by the machining gap. The positioning nut is used to lock the clamping bolt to prevent loosening.

[0008] Furthermore, in order to achieve the unlocking function after the transmission plate is rotated, the unlocking mechanism includes a rotating column mounted on one side of the upper connecting plate, a toggle block mounted on one side of the rotating column, a driven groove on one side of the transmission plate, and one end of the toggle block slidably mounted in the driven groove.

[0009] Furthermore, in order to achieve the automatic locking function when the lower connecting plate and the upper connecting plate are unfolded, a return spring is installed on one side of the upper connecting plate, a positioning hook is connected to one end of the toggle block, and one end of the return spring is installed on the positioning hook.

[0010] Furthermore, in order to increase the connection strength when locking, an auxiliary locking protrusion is provided on one side of the locking block, and an auxiliary locking groove is provided on one side of the locking slot. When locking, the auxiliary locking protrusion can be embedded into the auxiliary locking groove.

[0011] Furthermore, to facilitate the subsequent connection of an external unlocking lever to the folding mechanism, a transmission lever is connected to one end of the turning column.

[0012] Furthermore, to facilitate the connection of the lower connecting plate and the upper connecting plate to the seat bracket and the backrest respectively, the lower connecting plate has a first connection hole on both sides of its surface, and the upper connecting plate has a second connection hole on its surface.

[0013] The beneficial effects of this invention are as follows: By setting up an anti-sway mechanism consisting of a clamping bolt and a positioning nut, rotating the clamping bolt causes its end to directly press against the transmission plate, forcing the locking block to fit tightly against the inner wall of the locking groove, thereby effectively filling the tiny gaps caused by manufacturing tolerances or assembly errors. This mechanical pre-tightening method can fundamentally suppress the large swaying of the top of the backrest caused by the lever effect, and the positioning nut can prevent the clamping bolt from loosening in a vibration environment, ensuring locking stability during long-term use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the surface structure of an anti-sway car second-row seat backrest folding device according to an embodiment of the present invention; Figure 2 This is a side view of an anti-sway car second-row seat back folding device according to an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the internal structure of a second-row seat backrest folding mechanism for a car under sway control when locked, according to an embodiment of the present invention. Figure 5 A schematic diagram of the internal structure of an anti-sway car second-row seat backrest folding mechanism when unlocked according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of a folding second-row seat backrest folder in an anti-sway vehicle according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the installation structure of an anti-sway mechanism for the folding backrest of a second-row car seat according to an embodiment of the present invention.

[0016] In the picture: 1. Lower connecting plate; 2. Positioning shaft; 3. Upper connecting plate; 4. Support column; 5. Transmission plate; 6. Locking block; 7. Locking groove; 8. Anti-shaking mechanism; 801. Clamping bolt; 802. Positioning nut; 9. Unlocking mechanism; 901. Tightening column; 902. Actuating block; 903. Driven groove; 904. Return spring; 905. Positioning hook; 10. Auxiliary locking protrusion; 11. Auxiliary locking groove; 12. Transmission lever; 13. Connecting hole one; 14. Connecting hole two. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] According to an embodiment of the present invention, an adjustable friction pendulum vibration isolation bearing is provided. Example 1:

[0019] like Figures 1-5As shown, an anti-sway car second-row seat back folding device includes a lower connecting plate 1 made of metal. A positioning shaft 2 is connected to one side of the surface of the lower connecting plate 1. A pair of upper connecting plates 3 are rotatably connected to both sides of the positioning shaft 2. A support column 4 is connected to one side of the inner surface between the two upper connecting plates 3. A transmission plate 5 is rotatably mounted on the surface of the support column 4. A locking block 6 is connected to one side of the transmission plate 5. A locking groove 7 is opened on one side of the lower connecting plate 1. An anti-sway mechanism 8 is provided inside the lower connecting plate 1 and the locking groove 7. An unlocking mechanism 9 is provided between the transmission plate 5 and the upper connecting plate 3. The lower connecting plate 1 is installed on the car seat frame, and the upper connecting plate 3 is installed on the car seat back. The upper connecting plate 3 rotates on one side of the lower connecting plate 1 via the positioning shaft 2, thereby enabling the unfolding and folding of the car seat back. After unfolding, the locking block 6 on one side of the transmission plate 5 can be installed in the locking groove 7 on the lower connecting plate 1, thereby locking the rotation of the lower connecting plate 1 and the upper connecting plate 3. After locking, the anti-shaking mechanism 8 can effectively prevent the locking block 6 from sliding in the locking groove 7 due to processing gaps. The unlocking mechanism 9 can release the locking effect, thereby enabling the folding between the upper connecting plate 3 and the lower connecting plate 1.

[0020] like Figures 2-4 As shown, the anti-sway mechanism 8 includes a clamping bolt 801 threadedly connected to one side of the lower connecting plate 1. The clamping bolt 801 passes through one side of the lower connecting plate 1 and extends to the side of the transmission plate 5. A positioning nut 802 is threadedly connected to the clamping bolt 801. By rotating the clamping bolt 801, its end can press against the transmission plate 5, causing the locking block 6 to fit tightly against the inner wall of the locking groove 7, thereby eliminating minor gaps caused by manufacturing tolerances or assembly errors. The positioning nut 802 is used to lock the clamping bolt 801, preventing the clamping bolt 801 from loosening due to vehicle vibration and ensuring the anti-sway effect during long-term use.

[0021] like Figures 2-5As shown, the unlocking mechanism 9 includes a rotating pin 901 rotatably mounted on one side of the upper connecting plate 3, a toggle block 902 mounted on one side of the rotating pin 901, and a driven groove 903 on one side of the transmission plate 5. One end of the toggle block 902 is slidably mounted in the driven groove 903. By rotating the rotating pin 901, the toggle block 902 can slide in the driven groove 903, thereby causing the toggle block 902 to drive the transmission plate 5 to rotate around the support pin 4. After rotation, the locking block 6 on the transmission plate 5 can slide out from the locking groove 7, achieving the unlocking effect. A return spring 904 is mounted on one side of the upper connecting plate 3, and a positioning hook 905 is connected to one end of the toggle block 902. One end of the return spring 904 is mounted on the positioning hook 905. When the upper connecting plate 3 rotates and unfolds relative to the lower connecting plate 1, the locking groove 7 on the transmission plate 5 corresponds exactly to the locking groove 7 on the lower connecting plate 1. Through the elastic force of the return spring 904, the turning column 901 can be pushed to rotate, so that the toggle block 902 pushes the transmission plate 5 to rotate again in the opposite direction to the unlocking, so that the locking block 6 on the transmission plate 5 can be slidably installed in the locking groove 7, realizing the automatic locking effect when the folder is unfolded.

[0022] like Figures 4-6 As shown, to further increase the connection strength during locking, an auxiliary locking protrusion 10 is provided on one side of the locking block 6, and an auxiliary locking groove 11 is provided on one side of the locking slot 7. During locking, the auxiliary locking protrusion 10 can be correspondingly embedded into the auxiliary locking groove 11 to form a secondary engagement lock, significantly increasing the contact area and shear resistance of the locking part. One end of the turning column 901 is connected to a transmission lever 12, which has a mounting hole for attaching an external unlocking handle to the folding device, facilitating the rotation of the turning column 901 to unlock. The lower connecting plate 1 has a first connection hole 13 on both sides of its surface, and the upper connecting plate 3 has a second connection hole 14 on its surface. Through the first connection hole 13 and the second connection hole 14, the lower connecting plate 1 and the upper connecting plate 3 can be connected to the seat bracket and the backrest, respectively. Example 2:

[0023] like Figure 7 As shown, based on Embodiment 1, this embodiment can further install the anti-sway mechanism 8 by connecting a support plate to one side of the upper connecting plate 3, so that the clamping bolt 801 is threaded onto the support plate, and then the positioning nut 802 is installed on the clamping bolt 801. When the folder rotates and locks, by turning the clamping bolt 801 on the support plate, it is pressed against one side of the transmission plate 5, so that the locking block 6 is further pressed against the inner wall of the locking groove 7, eliminating the gap. Similarly, after adjusting the clamping bolt 801, turning the positioning nut 802 can lock the clamping bolt 801, reducing the possibility of loosening during subsequent use.

[0024] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0025] In summary, with the help of the above-mentioned technical solution of the present invention, in actual use, the lower connecting plate 1 is first fixed to the car seat frame (seat cushion part) through the connecting hole 13 on its surface, and the upper connecting plate 3 is connected to the seat back through the connecting hole 14. In the initial state, the seat back is in the unfolded use position. When the backrest is unfolded into place, under the elastic force of the return spring 904, the transmission plate 5 automatically rotates around the support column 4, so that the locking block 6 is accurately embedded in the locking groove 7 on the lower connecting plate 1, realizing automatic locking between the upper connecting plate 3 and the lower connecting plate 1. At the same time, the auxiliary locking protrusion 10 on one side of the locking block 6 is simultaneously embedded in the auxiliary locking groove 11 on one side of the locking groove 7, forming a secondary engagement, which enhances the strength of the locking connection.

[0026] Due to manufacturing tolerances or assembly errors, there may be a slight gap between the locking block 6 and the locking groove 7. In this case, the user or assembly worker can rotate the clamping bolt 801 in the anti-sway mechanism 8 to press the end of the clamping bolt 801 inward against the side wall of the transmission plate 5. After the transmission plate 5 is under pressure, it forces the locking block 6 to further press against the inner wall of the locking groove 7, thereby completely eliminating the play gap. After the gap is eliminated, tighten the positioning nut 802 to press it against the outer surface of the lower connecting plate 1 to prevent the clamping bolt 801 from loosening due to vibration during vehicle operation. The anti-sway mechanism 8 adopts a manual pre-tightening method, which can be flexibly adjusted according to the actual gap size, ensuring zero-gap fit while avoiding operational jamming caused by over-tightening.

[0027] When the seat back needs to be folded, the user rotates the transmission lever 12 via an external unlocking handle, causing the turning column 901 to rotate. The actuating block 902 on the turning column 901 slides within the driven groove 903 of the transmission plate 5, pushing the transmission plate 5 to rotate in the opposite direction around the support column 4, causing the locking block 6 to disengage from the locking groove 7. Simultaneously, the auxiliary locking protrusion 10 also disengages from the auxiliary locking groove 11, completing the unlocking process. At this point, the locking block 6 is completely disengaged from the locking groove 7, and the upper connecting plate 3 can fold the seat back forward to expand the trunk or rear passenger space. When it is necessary to restore the seat back to its original position, simply rotate the seat back in the opposite direction. During the reset process of the upper connecting plate 3, the reset spring 904 automatically drives the locking block 6 back into the locking groove 7, while the auxiliary locking protrusion 10 engages with the auxiliary locking groove 11, achieving the locking effect after unfolding.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A folding mechanism for the second-row seats of a car to prevent swaying, characterized in that, It includes a lower connecting plate (1), a positioning shaft (2) is connected to one side of the surface of the lower connecting plate (1), an upper connecting plate (3) is rotatably connected to both sides of the positioning shaft (2), a support column (4) is connected to one side of the surface of the upper connecting plate (3), a transmission plate (5) is rotatably installed on the surface of the support column (4), a locking block (6) is connected to one side of the transmission plate (5), a locking groove (7) is opened on one side of the lower connecting plate (1), an anti-shaking mechanism (8) is provided inside the lower connecting plate (1) and the locking groove (7), and an unlocking mechanism (9) is provided between the transmission plate (5) and the upper connecting plate (3).

2. The anti-sway car second-row seat back folding device according to claim 1, characterized in that, The anti-sway mechanism (8) includes a clamping bolt (801) threaded to one side of the lower connecting plate (1). The clamping bolt (801) passes through one side of the lower connecting plate (1) and extends to the side of the transmission plate (5). A positioning nut (802) is threaded onto the clamping bolt (801).

3. The anti-sway car second-row seat back folding device according to claim 1, characterized in that, The unlocking mechanism (9) includes a rotating column (901) rotatably mounted on one side of the upper connecting plate (3), a toggle block (902) mounted on one side of the rotating column (901), a driven groove (903) opened on one side of the transmission plate (5), and one end of the toggle block (902) slidably mounted in the driven groove (903).

4. The anti-sway car second-row seat back folding device according to claim 3, characterized in that, A reset spring (904) is installed on one side of the upper connecting plate (3), and a positioning hook (905) is connected to one end of the toggle block (902). One end of the reset spring (904) is installed on the positioning hook (905).

5. A folding backrest for a second-row car seat to prevent swaying, as described in claim 1, characterized in that... The locking block (6) has an auxiliary locking protrusion (10) on one side, and the locking groove (7) has an auxiliary locking groove (11) on one side.

6. A folding backrest for a second-row car seat to prevent swaying, as described in claim 3, is characterized in that... One end of the rotating column (901) is connected to a transmission lever (12).

7. A folding backrest for second-row seats in a car to prevent swaying, as described in claim 1, is characterized in that... The lower connecting plate (1) has a connecting hole 1 (13) on both sides of its surface, and the upper connecting plate (3) has a connecting hole 2 (14) on its surface.

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