A lifting device for adjusting the angle of a car seat

Abstract

The utility model discloses a kind of lifting devices of automobile seat angle adjustment, including pedestal fixed on vehicle body and the support frame for installing seat, the support frame is rotatably connected with pedestal by at least one pivot to realize angle adjustment.The pivot one end is equipped with the locking portion with external spline, pedestal is equipped with one axially slidable internal spline sleeve.The internal spline sleeve is linked with the adjusting connecting rod of support frame by a lever mechanism.When operating adjusting connecting rod changes seat angle, linkage drives internal spline sleeve axial movement and engages or separates with the locking portion of pivot.When engaging, pivot is circumferentially locked, prevent the change of seat angle due to vibration, linkage of adjustment and locking is realized, compact structure, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and more specifically, to a lifting device for adjusting the angle of an automotive seat. Background Technology

[0002] The angle adjustment function of car seats is crucial for improving driving and riding comfort. To achieve stepless angle adjustment and maintain the position, mechanisms such as worm gears or helical rods are typically used. However, these mechanisms are prone to loosening under long-term vehicle vibration, leading to unexpected changes in the seat angle and affecting comfort and safety.

[0003] Chinese invention patent CN118322956B discloses a car seat that uses an additional anti-loosening device to lock the connecting bolts. Although it can effectively prevent loosening, the device is separate from the seat adjustment system, has a complex structure, occupies a large space, and requires additional operating steps. It does not form an integrated system with the seat adjustment process, making it inconvenient to use and costly. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an integrated anti-loosening car seat adjustment device that is compact in structure, easy to operate, and can effectively prevent the adjustment mechanism from loosening.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A lifting device for adjusting the angle of a car seat includes a base fixed to a vehicle body and a support frame for mounting the car seat. The support frame is rotatably connected to the base via at least one pivot. One end of the pivot extends to form a locking portion. The outer peripheral surface of the locking portion is provided with an external spline. A sliding bearing coaxial with the locking portion is provided on the base. An inner spline sleeve is axially slidably installed inside the sliding bearing. The inner hole of the inner spline sleeve is provided with an inner spline adapted to the external spline. A return spring is sleeved on the outer periphery of the inner spline sleeve. One end of the return spring abuts against the sliding bearing, and the other end abuts against a spring retainer fixed on the inner spline sleeve. A lever is hinged to the base via a pin. The lever is hinged at the middle. One end of the lever is movably connected to the end of the inner spline sleeve via a first connecting pin. An adjusting rod for adjusting its angle is hinged to the support frame. The other end of the lever is movably connected to the adjusting rod via a second connecting pin.

[0006] As an improvement of this utility model, the end of the locking part is a guide cone surface, so that when the inner spline sleeve is reset under the action of the return spring, it can be smoothly introduced and the spline engagement can be completed.

[0007] As an improvement of this utility model, the adjusting connecting rod is a lead screw, which is threadedly engaged with a nut block fixed on the support frame. An adjusting handwheel for driving the lead screw to rotate is connected to the end of the lead screw. The second connecting pin is set on the nut block. Rotating the handwheel drives the lead screw to rotate, which is converted into linear motion of the nut block.

[0008] As an improvement of this utility model, the base is provided with a limiting block to restrict the rotation stroke of the nut block, so as to prevent over-adjustment.

[0009] As an improvement of this utility model, an angle pointer is fixed on the support frame, and an angle scale corresponding to the angle pointer is fixed on the base, so as to make it easy to read the current seat angle intuitively.

[0010] The car seat adjustment angle lifting device provided by this utility model has the following beneficial effects: This invention mechanically integrates the anti-loosening locking mechanism (spline sleeve and spline shaft) and the angle adjustment mechanism (adjusting linkage) through a lever system. During angle adjustment, the anti-loosening mechanism automatically unlocks; upon completion of adjustment, it automatically locks. This greatly simplifies the overall structure, reduces the number of parts, and improves the system's reliability and compactness.

[0011] Users can simultaneously set the angle and lock the seat with a single angle adjustment (such as turning the handwheel), without needing any additional steps to tighten the locking mechanism. At the same time, the automatic locking mechanism ensures that the seat angle remains stable over time even in vehicle vibration environments, guaranteeing driving and passenger safety.

[0012] The entire device requires no sensors, controllers, or electric drive mechanisms; it relies entirely on the interconnectedness of its mechanical structure to achieve its functions. This eliminates the malfunctions that can occur with electronic systems, ensuring extremely stable operation and a long lifespan. Furthermore, the purely mechanical structure facilitates mass production, resulting in low manufacturing costs, making it ideal for the automotive parts industry, where cost and reliability are paramount. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal spline sleeve connection.

[0014] List of identifiers in attached diagrams: 1. Base; 2. Support frame; 3. Pivot; 31. Locking part; 311. Guide cone surface; 5. Inner spline sleeve; 6. Return spring; 7. Spring retaining ring; 8. Lever; 81. Pin; 82. First connecting pin; 83. Second connecting pin; 9. Adjusting rod; 10. Nut block; 11. Adjusting handwheel; 13. Angle pointer; 14. Angle scale. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0016] Furthermore, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] As shown in the figure, this utility model provides a lifting device for adjusting the angle of a car seat, including a base 1 fixed to the vehicle body and a support frame 2 for mounting the car seat. The support frame 2 is rotatably connected to the base 1 via at least one pivot 3. One end of the pivot 3 extends to form a locking part 31. The outer peripheral surface of the locking part 31 is provided with an external spline. The base 1 is provided with a sliding bearing coaxial with the locking part 31. An inner spline sleeve 5 is axially slidably installed in the sliding bearing. The inner hole of the inner spline sleeve 5 is provided with a hole that matches the outer spline. The inner spline sleeve 5 is fitted with a return spring 6 on its outer periphery. One end of the return spring 6 abuts against the sliding bearing, and the other end abuts against the spring retaining ring 7 fixed on the inner spline sleeve 5. The base 1 is hinged to a lever 8 via a pin 81. The lever 8 is hinged in the middle, and one end of the lever 8 is movably connected to the end of the inner spline sleeve 5 via a first connecting pin 82. An adjusting rod 9 for adjusting its angle is hinged to the support frame 2, and the other end of the lever 8 is movably connected to the adjusting rod 9 via a second connecting pin 83.

[0018] The locking part 31 of this utility model has a guide cone surface 311 at its end, so that when the inner spline sleeve 5 is reset under the action of the reset spring 6, it can be smoothly introduced and the spline engagement can be completed.

[0019] The adjusting connecting rod 9 of this utility model is a lead screw. The lead screw is threadedly engaged with a nut block 10 fixed on the support frame 2. An adjusting handwheel 11 for driving the lead screw to rotate is connected to the end of the lead screw. The second connecting pin 83 is set on the nut block 10. Rotating the handwheel drives the lead screw to rotate, which is converted into linear motion of the nut block 10.

[0020] The base 1 of this utility model is provided with a limiting block to restrict the rotation stroke of the nut block 10, so as to prevent over-adjustment.

[0021] An angle pointer 13 is fixed on the support frame 2 of this utility model, and an angle scale 14 corresponding to the angle pointer 13 is fixed on the base 1, so as to make it easy to read the current seat angle intuitively.

[0022] Specifically, the working principle of this utility model is as follows: When the seat angle is not adjusted, the inner spline sleeve 5 is pushed to the right by the elastic force of the return spring 6, and its inner spline fully engages with the outer spline of the locking part 31 of the pivot 3. At this time, the pivot 3 cannot rotate, and the seat angle is firmly locked.

[0023] When the seat angle needs to be adjusted, the user rotates the adjustment handwheel 11 counterclockwise. The adjustment handwheel 11 drives the lead screw (adjustment linkage 9) to rotate, causing the nut block 10 to move backward. The nut block 10 pulls the lower end of the lever 8 backward via the second connecting pin 83, forcing the lever 8 to rotate counterclockwise around the pin 81. The upper end of the lever 8 then pushes the inner spline sleeve 5 to the left via the first connecting pin 82, compressing the return spring 6, causing the inner spline of the inner spline sleeve 5 to disengage from the locking part 31 of the pivot 3, at which point the pivot 3 is unlocked. Continuing to rotate the handwheel, the movement of the nut block 10 applies a torque to the support frame 2 through the hinge point of the lever 8 and the support frame 2, forcing the support frame 2 to rotate around the pivot 3, thereby changing the seat angle. The angle pointer 13 indicates the current angle on the dial.

[0024] Once the desired angle is achieved, the user stops turning the handwheel. At this point, if the seat experiences a slight tendency to rotate due to vibration, the support frame 2 will create a slight disturbance in the system through the adjusting linkage 9 and lever 8 mechanism. However, under the strong restoring force of the return spring 6, the inner spline sleeve 5 will be pushed to the right. With the help of the guide cone surface 311 at the end of the locking part 31, the inner spline sleeve 5 can automatically align and quickly re-engage with the locking part 31, producing a "click" sound, completing the automatic locking and fixing the seat back to the new angle.

[0025] The accompanying drawings merely illustrate the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, various improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A lifting device for adjusting the angle of a car seat, comprising a base fixed to the vehicle body and a support frame, wherein the support frame is rotatably connected to the base via at least one pivot, characterized in that: One end of the pivot extends to form a locking portion, the outer peripheral surface of which is provided with an external spline. A sliding bearing coaxial with the locking portion is provided on the base. An inner spline sleeve is axially slidably installed inside the sliding bearing. The inner hole of the inner spline sleeve is provided with an inner spline adapted to the external spline. A return spring is sleeved on the outer periphery of the inner spline sleeve. One end of the return spring abuts against the sliding bearing, and the other end abuts against a spring retaining ring fixed on the inner spline sleeve. A lever is hinged to the base by a pin. The lever is hinged in the middle. One end of the lever is movably connected to the end of the inner spline sleeve by a first connecting pin. An adjusting rod is hinged to the support frame. The other end of the lever is movably connected to the adjusting rod by a second connecting pin.

2. The lifting device for adjusting the angle of a car seat according to claim 1, characterized in that: The end of the locking part is a guide cone surface.

3. The lifting device for adjusting the angle of a car seat according to claim 1, characterized in that: The adjusting connecting rod is a lead screw, which is threadedly engaged with a nut block fixed on the support frame. An adjusting handwheel for driving the lead screw to rotate is connected to the end of the lead screw, and the second connecting pin is disposed on the nut block.

4. The lifting device for adjusting the angle of a car seat according to claim 3, characterized in that: The base is equipped with a limiting block.

5. The lifting device for adjusting the angle of a car seat according to claim 1, characterized in that: An angle pointer is fixed on the support frame, and an angle scale corresponding to the angle pointer is fixed on the base.

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