A stable driver's seat

Abstract

The present invention relates to the technical field of automotive seats, and specifically relates to a stable driver's seat, which includes a seat frame assembly and a backrest frame assembly. The backrest frame assembly includes an angle adjustment mechanism. The seat frame assembly includes seat frame side plates, a seat pan, a rear cross tube, and a lifting adjustment mechanism. The seat frame side plates, the seat pan, and the rear cross tube enclose a rectangular seat frame. The rear cross tube is connected to the lifting adjustment mechanism. Both ends of the rear cross tube are spin riveted to the seat frame side plates, and a clamping boss is formed by spin riveting at the end of the rear cross tube. The diameter of the clamping boss is greater than the diameter of the rear cross tube. An annular connecting protrusion for engaging with the clamping boss is provided on the seat frame side plate. The diameter of the connecting protrusion is smaller than the diameter of the clamping boss. The present invention can solve the problem in the prior art that the stability of the seat is not high due to the poor stability of the rear cross tube.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seats, and particularly to a stable driver's seat. Background Art

[0002] With the gradual improvement of people's living standards, automobiles are increasingly widely used in people's lives. As one of the important means of transportation for people to travel, people's requirements for various aspects of automobiles are also getting higher and higher. Among them, as one of the vehicle components that directly contact the occupants, the quality of the seat is directly related to the comfort and safety of the occupants during riding.

[0003] Among them, the stability and strength of the seat lifting and adjusting mechanism in an automobile directly affect the stability of the seat. As one of the main components of the seat lifting and adjusting mechanism, the stability of the rear cross tube is one of the important factors determining the stability of the seat lifting and adjusting mechanism. However, in the prior art, the rear cross tube is mostly connected to the side plate of the seat frame by direct press-fitting. During long-term use, the rear cross tube is prone to further deformation and loosening, and the lifting and adjusting of the seat cannot be stably realized, so it seriously affects the strength and stability of the seat and there are potential safety hazards.

[0004] In addition, the stability of the angle adjusting mechanism is also one of the important factors determining the overall stability of the seat. The existing angle adjusting mechanism includes a main angle adjuster, a sub-angle adjuster and a synchronous shaft. The synchronous shaft is used to connect the main angle adjuster and the sub-angle adjuster so that the sub-angle adjuster and the main angle adjuster adjust the angle synchronously. Both the main angle adjuster and the sub-angle adjuster include a seat frame connecting plate, a backrest connecting plate and an angle adjusting core. A fixing bracket is connected to the seat frame connecting plate by screws, a hook spring plate is connected to the backrest connecting plate by screws, a coil spring is connected between the hook spring plate and the fixing bracket, and both ends of the coil spring are respectively fixed on the hook spring plate and the fixing bracket. The existing fixing bracket is connected to the seat frame connecting plate by screws. When the seat is adjusted in angle, the coil spring deforms, generating a large torque on the fixing bracket. After long-term use, the fixing bracket is prone to loosening, resulting in instability of the overall structure of the angle adjuster, and further affecting the stability of the entire seat. Summary of the Invention

[0005] The present invention aims to provide a stable driver's seat to solve the problem of low seat stability caused by poor stability of the rear cross tube in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A stable driver's seat includes a seat frame assembly and a backrest frame assembly. The backrest frame assembly includes an angle adjustment mechanism. The seat frame assembly includes seat frame side plates, a seat pan, a rear cross tube, and a lifting adjustment mechanism. The seat frame side plates, the seat pan, and the rear cross tube enclose a rectangular seat frame. The rear cross tube is connected to the lifting adjustment mechanism. Both ends of the rear cross tube are spin riveted to the seat frame side plates. The end of the rear cross tube is spin riveted to form a clamping boss. The diameter of the clamping boss is larger than that of the rear cross tube. An annular connecting protrusion for engaging with the clamping boss is provided on the seat frame side plate. The diameter of the connecting protrusion is smaller than that of the clamping boss.

[0008] The principle and beneficial effects of this solution are as follows:

[0009] The seat frame side plates, the seat pan, and the rear cross tube are connected to enclose the seat frame of the seat. The angle adjustment mechanism is used to adjust the angle of the backrest. The lifting adjustment mechanism is used to adjust the height of the seat. Thus, the seat can be adjusted according to the needs of the occupant, making the occupant more comfortable. The lifting adjustment mechanism is used to control the rotation of the rear cross tube. The rear cross tube is used to drive the rotation of the seat, thereby realizing the lifting adjustment of the seat. The rear cross tube is connected to the seat frame side plates by spin riveting. Compared with the method of directly pressing into the seat frame side plates in the prior art, a clamping boss is formed at the end of the rear cross tube by spin riveting and is buckled on the connecting protrusion, which can make the rear cross tube better connected to the seat frame side plates; improve the stability of the rear cross tube, prevent the rear cross tube from loosening during long-term use, thereby improving the stability of the seat lifting adjustment and also improving the stability and structural strength of the entire seat.

[0010] Furthermore, a booster spring is arranged inside the rear cross tube. The booster spring abuts against the rear cross tube. One end of the booster spring extends out of the rear cross tube and is fixed on the seat frame side plate.

[0011] Beneficial effect: The booster spring serves as a boosting component for the seat lifting adjustment. When the rear cross tube rotates, the booster spring is twisted, providing an upward pushing force to the seat, making the adjustment of the seat easier and more convenient.

[0012] Furthermore, two concave depressions are formed by inwardly denting the side wall of the rear cross tube. The two concave depressions are symmetrically arranged with the axis of the rear cross tube as the symmetry line. The booster spring is clamped between the two concave depressions.

[0013] Beneficial effect: The two concave depressions are symmetrically arranged with the axis of the rear cross tube as the symmetry line, which can better clamp the booster spring inside the rear cross tube, prevent the booster spring from rotating during the twisting process, thereby improving the installation stability of the booster spring and reducing the potential failure risk of the booster spring.

[0014] Furthermore, two sets of the above-mentioned concave depressions are provided on the rear cross tube.

[0015] Beneficial effect: Arranging multiple sets of concave depressions can better clamp the booster spring and further improve the installation stability of the booster spring.

[0016] Further, the connecting projection is stamped on the side plate of the seat frame.

[0017] Beneficial effects: The connecting projection is directly stamped on the side plate of the seat frame, with better connection strength and stability, enabling better cooperation with the rear cross tube, thereby further improving the installation stability and strength of the rear cross tube.

[0018] Further, a grid and several cushion plates are arranged inside the seat frame. The grid is connected to the inner wall of the seat frame. The cushion plate includes a main body and a torsion-resistant connecting part integrally formed on the main body. Both ends of the main body and the torsion-resistant connecting part are connected to the grid.

[0019] Beneficial effects: The grid and cushion plates inside the seat frame are used to form the seat cushion frame of the seat. The grid is used to install the cushion plates. By adding a torsion-resistant connecting part to the cushion plates, compared with simply relying on both ends of the main body to be connected to the grid, the cushion plates rely on both ends of the main body and the torsion-resistant connecting part to be connected to the grid together. The entire cushion plate is pulled by multiple connection points, so it can improve the situation of being distorted due to thermal expansion and contraction, improve the problem of abnormal noise of the grid seat cushion, and at the same time improve the comfort of the occupant when sitting.

[0020] Further, the backrest frame assembly further includes backrest side plates, an upper cross beam and a lower cross beam. The backrest side plates, the upper cross beam and the lower cross beam enclose a rectangular backrest frame. The upper cross beam is U-shaped. Both ends of the upper cross beam are connected to the top of the backrest side plates. A headrest tube is vertically fixedly connected to the top of the upper cross beam. The middle part of the vertical part of the upper cross beam is recessed in an arc towards the rear of the seat, and the angle of the recess is 171 - 176 degrees.

[0021] Beneficial effects: The backrest side plates, the upper cross beam and the lower cross beam enclose a rectangular backrest frame. The headrest tube is used to install the pillow. The upper cross beam is recessed in an arc towards the rear of the seat, which is more in line with the structure of the human head and neck, and can improve the comfort of the occupant when using the pillow.

[0022] Further, the angle adjustment mechanism includes a main angle adjuster, a sub-angle adjuster and a synchronizing shaft. Both the main angle adjuster and the sub-angle adjuster include a seat frame connecting plate, a backrest connecting plate and an angle adjustment core located between the seat frame connecting plate and the backrest connecting plate. A fixed bracket is integrally formed on the seat frame connecting plate. A hook spring plate is fixedly connected to the backrest connecting plate. A coil spring is connected between the hook spring plate and the fixed bracket.

[0023] Beneficial effects: In this solution, the fixed bracket is integrally formed with the seat frame connecting plate, enhancing the connection strength. When the seat adjusts the angle and the coil spring deforms, the torsion force received by the fixed bracket is borne by the entire seat frame connecting plate as a whole. Compared with the prior art, the connection strength of this solution is better, and there is no problem of the fixed bracket becoming loose due to the loosening of the screw.

[0024] Further, the cross section of the synchronizing shaft is polygonal.

[0025] Beneficial effects: The synchronous shaft in the prior art adopts a circular tube structure. After both ends are flattened, a circular tube is welded to connect with the main angle adjuster and the auxiliary angle adjuster. Due to quality problems at the welding positions, such as false welding and virtual welding, the entire structure is prone to instability and the synchronization rate at both ends of the synchronous shaft is reduced. In this solution, the cross-section of the synchronous shaft is polygonal, which can not only be directly connected to the main angle adjuster and the auxiliary angle adjuster, facilitating processing, but also avoid the structural instability and low synchronization rate caused by welding quality problems.

[0026] Furthermore, the cross-section of the synchronous shaft is a regular quadrilateral.

[0027] Beneficial effects: The regular quadrilateral structure is simple and is easier to process compared to pentagons and hexagons. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0029] Figure 2 is Figure 1 the left view of;

[0030] Figure 3 is a schematic structural diagram of the seat frame assembly in an embodiment of the present invention;

[0031] Figure 4 is a partial schematic structural diagram of the seat frame assembly in an embodiment of the present invention;

[0032] Figure 5 is Figure 3 the top view of;

[0033] Figure 6 is Figure 3 a partial right view of;

[0034] Figure 7 is a schematic structural diagram of the backrest frame assembly in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following is a further detailed description through specific embodiments:

[0036] The reference numerals in the accompanying drawings of the specification include: mounting seat 1, seat frame side plate 2, assist spring 3, card slot 4, rear cross tube 5, indentation 6, sector gear plate 7, connecting protrusion 8, clamping boss 9, main body 10, anti-torsion connection part 11, grid 12, seat pan 13, headrest tube 14, upper cross beam 15, backrest side plate 16, backrest connecting plate 17, hook spring plate 18, clamping groove 19, fixed bracket 20, synchronous shaft 21, seat frame connecting plate 22, lower cross beam 23, coil spring 24.

[0037] Embodiment 1

[0038] As Figure 1 and Figure 2 shown, a stable driver's seat includes a seat frame assembly and a backrest frame assembly. Combining Figure 3 and Figure 4 it can be known that the seat frame assembly includes a rear cross tube 5, seat frame side plates 2 and a seat pan 13. The rear cross tube 5, seat frame side plates 2 and seat pan 13 enclose a rectangular seat frame. An elevation adjustment mechanism is installed on the seat frame. The elevation adjustment mechanism is connected to the rear cross tube 5 and is used to drive the rear cross tube 5 to rotate so as to realize the elevation adjustment of the seat.

[0039] The elevation adjustment mechanism is a commonly used adjustment mechanism in vehicle seats. The specific setting method of the elevation adjustment mechanism provided in this embodiment is as follows: it includes a sector gear plate 7, a pinion gear (not shown in the figure) and an elevation adjustment handle (not shown in the figure). The pinion gear is rotatably connected to the seat frame side plate 2 on the right side of the seat ( Figure 1 the right side in

[0040] As Figure 5 shown, both ends of the rear cross tube 5 are respectively connected to the two seat frame side plates 2 by means of spin riveting. Clamping bosses 9 are formed by spin riveting at both ends of the rear cross tube 5, and the diameter of the clamping bosses 9 is larger than that of the rear cross tube 5. Annular connecting protrusions 8 for engaging with the clamping bosses 9 are stamped on the outer sides of the two seat frame side plates 2. The diameter of the connecting protrusions 8 is smaller than that of the clamping bosses 9. After the rear cross tube 5 is connected to the seat frame side plates 2, the clamping bosses 9 are buckled on the connecting protrusions 8.

[0041] A boosting spring 3 is installed inside the rear cross tube 5. Specifically, the boosting spring 3 is threaded through the rear cross tube 5. As Figure 3 shown, the right end of the boosting spring 3 extends out of the rear cross tube 5 and is fixed to the seat frame side plate 2. Specifically, a convex edge extends integrally outward from the bottom of the seat frame side plate 2 on the right side, and a card slot 4 is opened at the right end of the convex edge. The right end of the boosting spring 3 extends out of the rear cross tube 5 and is clamped in the card slot 4. Combining Figure 5 and Figure 6 it can be known that two groups of indentations 6 are formed by the inward depression of the side wall of the rear cross tube 5. The number of each group of indentations 6 is two, and the two indentations 6 in each group are symmetrically arranged with the axis of the rear cross tube 5 as the symmetry line. The boosting spring 3 is clamped between the two indentations 6.

[0042] Two sets of indentations 6 on the rear cross tube 5 are symmetrically arranged with respect to the middle of the rear cross tube 5. That is, taking the middle of the rear cross tube 5 as the boundary, the two sets of indentations 6 are distributed on both sides of the middle of the rear cross tube 5, and there are no indentations 6 formed in the middle and at both ends of the rear cross tube 5. With this arrangement, on the one hand, the part of the rear cross tube 5 without the indentation 6 is convenient for fixing components such as the sector gear plate 7; on the other hand, the two sets of indentations 6 are symmetrically arranged with respect to the middle of the rear cross tube 5, which can also make the acting force exerted on the assist spring 3 more evenly distributed and better clamp the assist spring 3.

[0043] Another example is Figure 5 As shown, a grid 12 and several cushion plates are installed in the seat frame. The grid 12 is made of a metal tube in the shape shown, and of course, the metal tube can also be bent into other shapes. The free end of the grid 12 is connected to the inner wall of the seat frame by bolts or the like. The cushion plates are made of plastic cushion plates, and the plastic cushion plates can provide a certain amount of elasticity. The cushion plate includes a main body 10 and a torsion-resistant connecting portion 11 integrally formed on the main body 10. Both ends of the main body 10 and the torsion-resistant connecting portion 11 are rotatably sleeved on the grid 12. Figure 5

[0044] Figure 5 In this embodiment, the cushion plates mainly include upper ( upper middle part) and lower U-shaped cushion plates, and middle cushion plates. For the upper cushion plate, its horizontal and straight part is the main body 10, and the vertical parts at both ends of the horizontal and straight part are the torsion-resistant connecting portions 11. By connecting both ends of the main body 10 to the grid 12 and connecting the torsion-resistant connecting portion 11 to the corner of the grid 12, it is possible to effectively prevent the overall long strip-shaped cushion plate from being distorted. For the middle cushion plate, its horizontal and straight part is the main body 10, and the two vertical parts connected to the upper part of the main body 10 are the torsion-resistant connecting portions 11. Similarly, by increasing the connection between the torsion-resistant connecting portion 11 and the grid 12, it is also possible to effectively prevent this cushion plate from being distorted, improve the phenomenon of abnormal noise in the seat, and improve the comfort of the occupant when sitting.

[0045] Figure 7 As Figure 2 shown, the backrest frame assembly includes an angle adjustment mechanism, backrest side plates 16, an upper cross beam 15, and a lower cross beam 23. The backrest side plates 16, the upper cross beam 15, and the lower cross beam 23 enclose a rectangular backrest frame. The upper cross beam 15 is U-shaped, and both ends of the upper cross beam 15 are connected to the tops of the two backrest side plates 16. A headrest tube 14 is vertically welded to the top of the upper cross beam 15 for installing a pillow. Combining Figure 2 it can be seen that the middle of the vertical part of the upper cross beam 15 is arc-shaped and recessed towards the rear of the seat, and the angle of the recess is 171 - 176 degrees, and the angle of the recess in the structure shown in

[0046] is 176 degrees. With this arrangement, it is more in line with the human head and neck structure and improves the comfort of the occupant when using the headrest. Another example is Figure 7As shown, the angle adjustment mechanism includes a main angle adjuster, a sub-angle adjuster, and a synchronization shaft 21. The main angle adjuster and the sub-angle adjuster are respectively installed on the right side ( Figure 7 right side in

[0047] the middle) and the left side of the backrest frame. An angle adjustment handle is installed on the main angle adjuster. The cross-section of the synchronization shaft 21 is square. The synchronization shaft 21 is used to connect the main angle adjuster and the sub-angle adjuster so that the sub-angle adjuster synchronously adjusts the angle of the seat with the main angle adjuster. Both the main angle adjuster and the sub-angle adjuster include a seat frame connection plate 22, a backrest connection plate 17, and an internally meshing disc type angle adjustment core (the same as the Chinese utility model patent CN204149896U) located between the seat frame connection plate 22 and the backrest connection plate 17. A fixed bracket 20 is integrally formed on the seat frame connection plate 22. A hook spring plate 18 is bolted to the backrest connection plate 17. A coil spring 24 is connected between the hook spring plate 18 and the fixed bracket 20. Clamping grooves 19 are integrally formed on both the fixed bracket 20 and the hook spring plate 18. Both ends of the coil spring 24 are respectively hooked on the clamping grooves 19 on the fixed bracket 20 and the hook spring plate 18.

[0048] The rear cross tube 5, the seat frame side plate 2, and the seat pan 13 enclose the seat frame of the seat. The mesh 12 seat cushion is used to provide the main supporting force for the occupant to sit. The lifting adjustment mechanism is used to control the rotation of the rear cross tube 5, thereby realizing the lifting adjustment of the seat. Specifically, when adjusting the height of the seat, torque is input at the adjustment handle. The small gear connected to the adjustment handle meshes with the sector gear plate 7. The torque is transmitted to the sector gear plate 7 through the small gear, driving the sector gear plate 7 to rotate, thereby realizing the purpose of lifting or lowering the seat, and finally achieving the purpose of adjusting the height of the seat.

[0049] Since both ends of the rear cross tube 5 are swaged and riveted on the seat frame side plate 2, and clamping bosses 9 are formed by swaging and riveting at both ends of the rear cross tube 5 to be buckled on the coupling protrusions 8 on the seat frame side plate 2, the installation stability of the rear cross tube 5 is greatly improved, and further the stability and reliability of the seat lifting adjustment are improved. Compared with directly press-fitting the rear cross tube 5 in the prior art, it can avoid the situation that the rear cross tube 5 further deforms and loosens during long-term use, thereby reducing the reliability of the seat lifting adjustment. At the same time, due to the improved stability of the rear cross tube 5, the stability and structural strength of the entire seat are also improved.

[0050] In this embodiment, the assisting spring 3 is threaded through the rear cross tube 5. When the rear cross tube 5 rotates, it can drive the assisting spring 3 to twist, thereby providing an upward pushing force to the seat, pushing the seat and the occupant upward, assisting in the lifting of the seat, and making the adjustment of the seat easier and more convenient. Since two sets of symmetrical indentations 6 are formed by recessing on the rear cross tube 5, these two sets of symmetrical indentations 6 tightly clamp the assisting spring 3 inside the rear cross tube 5, effectively preventing the assisting spring 3 from rotating during the adjustment of the seat. The stability of the assisting spring 3 is improved, the loosening of the assisting spring 3 is avoided, the potential failure risk of the assisting spring 3 is reduced, and thus the stability of the seat lifting adjustment is improved.

[0051] In this embodiment, the fixing bracket 20 and the seat connecting plate are integrally formed, enhancing the connection strength. When the seat adjusts the angle and the coil spring 24 deforms, the torsion force received by the fixing bracket 20 is borne by the entire seat connecting plate integrally, avoiding the problem of screw loosening of the fixing bracket 20 connected by screws after the seat adjusts the angle for a long time and many times. Moreover, the synchronous shaft 21 in this embodiment adopts a square tube structure. Compared with the structure of welding three round tubes in the prior art, this embodiment is not only convenient for installation, but also can avoid the problems of poor stability and synchronization rate of the angle adjustment mechanism caused by welding quality.

[0052] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A stable driver's seat, comprising a seat frame assembly and a backrest frame assembly, the backrest frame assembly including an angle adjustment mechanism, characterized in that: The seat frame assembly includes seat frame side plates, a seat pan, a rear cross tube, and a lifting and adjusting mechanism. The seat frame side plates, the seat pan, and the rear cross tube enclose a rectangular seat frame. The rear cross tube is connected to the lifting and adjusting mechanism. Both ends of the rear cross tube are spin riveted to the seat frame side plates. A clamping boss is formed by spin riveting at the end of the rear cross tube. The diameter of the clamping boss is larger than that of the rear cross tube. An annular connecting protrusion for engaging with the clamping boss is provided on the seat frame side plate. The diameter of the connecting protrusion is smaller than that of the clamping boss. A boosting spring is arranged inside the rear cross tube and abuts against the rear cross tube. One end of the boosting spring extends out of the rear cross tube and is fixed to the seat frame side plate. Two concave depressions are formed by inward depression on the side wall of the rear cross tube. The two concave depressions are symmetrically arranged with the axis of the rear cross tube as the symmetry line. The boosting spring is clamped between the two concave depressions. The angle adjusting mechanism includes a main angle adjuster, a sub-angle adjuster, and a synchronizing shaft. Both the main angle adjuster and the sub-angle adjuster include a seat frame connecting plate, a backrest connecting plate, and an angle adjusting core located between the seat frame connecting plate and the backrest connecting plate. The seat frame connecting plate is connected to the seat frame side plate. The backrest connecting plate is connected to the backrest side plate. A fixed bracket is integrally formed on the seat frame connecting plate. A hook spring plate is fixedly connected to the backrest connecting plate. A coil spring is connected between the hook spring plate and the fixed bracket. The cross section of the synchronizing shaft is polygonal. The lifting and adjusting mechanism includes a sector gear plate, a pinion, and a lifting and adjusting handle. A grid and a number of pads are arranged inside the seat frame. The grid is connected to the inner wall of the seat frame. The pad includes a main body and a torsion-resistant connecting part integrally formed on the main body. Both ends of the main body and the torsion-resistant connecting part are connected to the grid. The grid is made of a metal tube, and the pad is made of a plastic pad.

2. The stable driver's seat according to claim 1, wherein: Two groups of the concave depressions are provided on the rear cross tube.

3. The stable driver's seat according to claim 2, characterized in that: The connecting protrusion is stamped on the seat frame side plate.

4. A stable driver's seat according to claim 3, characterized in that: The backrest frame assembly further includes backrest side plates, an upper cross beam, and a lower cross beam. The backrest side plates, the upper cross beam, and the lower cross beam enclose a rectangular backrest frame. The upper cross beam is U-shaped. Both ends of the upper cross beam are connected to the top of the backrest side plates. A headrest tube is vertically fixedly connected to the top of the upper cross beam. The middle of the vertical part of the upper cross beam is arc-shaped and recessed towards the rear of the seat. The angle of the recessed part is 171 to 176 degrees.

5. The stable driver's seat according to claim 4, characterized in that: The cross section of the synchronizing shaft is a regular quadrilateral.

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