A seat pan with high safety stability

Abstract

The utility model relates to a seat chassis technical field especially relates to is a kind of high safety stability seat chassis, including bottom plate, it is characterized by: the bottom plate is equipped with U-shaped support and locking tooth group respectively from front to back along longitudinal axis, the bottom plate lower is equipped with movable middle disc and is equipped with connecting rivet at junction, one side of movable middle disc is equipped with conical tube fixed plate, the conical tube fixed plate bottom is equipped with connecting conical tube, the other side of movable middle disc is equipped with elastic force adjusting mechanism, the elastic force adjusting mechanism bottom is equipped with protective cover, movable middle disc center corresponds conical tube and is equipped with lifting adjusting mechanism, the utility model provides a kind of high safety stability seat chassis, and the comprehensive performance is promoted by the cooperation design of multiple components;U-shaped support and locking tooth group are reasonably laid out on bottom plate, movable middle disc is riveted firm through bushing;Conical tube fixed plate and elastic force adjusting mechanism realize height adjustment and elastic force adaptation, and lifting adjusting mechanism accurately controls height.

Description

Technical Field

[0001] This utility model relates to the field of seat chassis technology, and in particular to a seat chassis with high safety and stability. Background Technology

[0002] Traditional seat chassis, as a key component connecting the seat surface and the support structure, primarily serve to achieve seat height adjustment, stability maintenance, and basic load-bearing functions. In existing technologies, common seat chassis typically only offer a single height adjustment function or are equipped with only a basic locking device. While some products attempt to integrate a spring adjustment module, these often suffer from loose structures and poor component coordination. Specifically, the locking mechanisms of traditional chassis often suffer from limited locking strength due to a limited number of teeth or insufficient precision, making them prone to loosening over long-term use and unable to meet the stability needs of users of different weights or under dynamic loads. Height adjustment functions often rely on a single lifting component, which is prone to jamming or positioning deviations during adjustment, affecting the user experience. Spring adjustment modules often suffer from rapid spring decay or difficulty in adjustment due to a lack of protective structures for the compression springs or low precision in the adjustment mechanism. These shortcomings collectively limit the performance of seat chassis in terms of safety, comfort, and long-term reliability, making it difficult to meet modern users' demands for multifunctionality and high stability in seats.

[0003] Chinese patent discloses a seat chassis (publication number: CN 213216130 U), which includes a main base, a rear base, a clamping block, a clamping block notch, a clamping block stop, an adjusting screw, and an adjusting knob. The rear base is hinged to one end of the main base, and a clamping block is inserted and fixed inside the rear base. The upper end of the clamping block is provided with a clamping block notch, and a clamping block stop is fixed to one side of the clamping block. An adjusting screw is inserted into the rear base on one side of the clamping block, and an adjusting knob is screwed to one end of the adjusting screw. However, this seat chassis has a single function, insufficient locking strength and is easy to loosen, the height adjustment is prone to jamming and deviation, the elastic adjustment is easy to decay and difficult to operate, the structure is loose and the coordination is poor, and the overall safety, comfort and reliability are low, making it difficult to meet the needs of modern users for multi-functional and highly stable seats. Therefore, a seat chassis with high safety and stability is needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing seat chassis in the prior art, such as limited functionality, insufficient locking strength and easy loosening, easy jamming and deviation in height adjustment, easy attenuation and difficult operation of elastic adjustment, loose structure and poor coordination, and low overall safety, comfort and reliability, which make it difficult to meet the needs of modern users for multifunctional and highly stable seats. Therefore, this invention proposes a highly safe and stable seat chassis.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-safety and stable seat chassis of this utility model includes a base plate, characterized in that: a U-shaped bracket and a locking gear assembly are respectively provided along the longitudinal axis from front to back on the base plate; a movable disc is provided below the base plate with connecting rivets at the connection points; bushings are provided at the connection points between the connecting rivets and the movable disc; a conical tube fixing plate is provided on one side of the movable disc; a positioning groove is provided on one side of the conical tube fixing plate; a connecting conical tube is provided at the bottom of the conical tube fixing plate; an elastic adjustment mechanism is provided on the other side of the movable disc; a protective cover is provided at the bottom of the elastic adjustment mechanism; a lifting adjustment mechanism is provided at the center of the movable disc corresponding to the conical tube; and a locking adjustment mechanism is provided on one side of the lifting adjustment mechanism. Reasonable Structural Layout: By orderly arranging components such as U-shaped brackets and locking gears on the base plate, the entire seat chassis structure is more regular, facilitating the installation of various components and subsequent maintenance operations; Enhanced Connection Stability: Connecting rivets link the base plate and the movable center plate, and bushings are installed, effectively reducing friction and wear at the connection points, improving the stability and reliability of the connection, and ensuring that the seat chassis will not pose a safety hazard due to loose connections during long-term use; High Functional Integration: Integrating the cone tube fixing plate, elastic adjustment mechanism, height adjustment mechanism, and locking adjustment mechanism into one unit, the seat chassis can achieve multiple functions, such as height adjustment, elastic adjustment, and locking functions, meeting the user's needs for different seat usage states; Providing a Positioning Foundation: The positioning grooves on the cone tube fixing plate provide a precise positioning foundation for related components, helping to improve the matching accuracy between various components, thereby enhancing the overall performance and stability of the seat chassis.

[0006] Preferably, the height adjustment mechanism includes a fixed base, a height adjustment block connected to one side of the fixed base, a height adjustment spring connected to one end of the height adjustment block, and a height adjustment cable connected to one end of the height adjustment spring. By operating the height adjustment cable, the height adjustment spring and the height adjustment block can be moved, thereby adjusting the seat height. Users can easily adjust the seat to a suitable height according to their needs, improving comfort. The fixed base provides a stable support foundation for the entire height adjustment mechanism, and the height adjustment spring plays a buffering and balancing role during the adjustment process, making the seat height adjustment process smoother and avoiding sudden changes in height, thus improving the user experience.

[0007] Preferably, the locking adjustment mechanism includes a locking plate, a guide pin at the center of the locking plate, a locking torsion spring on the guide pin, a locking adjustment cable connected to the other side of the locking torsion spring, a positioning screw at the center of the locking torsion spring that cooperates with the locking torsion spring, and a return spring between the positioning screw and the locking adjustment cable. Pulling the locking adjustment cable activates the locking plate and locking torsion spring, thus adjusting the seat chassis's locking status. Users can easily control the seat's locking and unlocking as needed, facilitating seat use and adjustment. The locking torsion spring acts as an elastic buffer during the locking adjustment process, reducing the impact force between the locking plate and the locking gear assembly, protecting related components from damage, and making the locking process smoother and more stable. The return spring returns the locking plate and locking torsion spring to their initial state after the tension on the locking adjustment cable is released, achieving automatic locking or unlocking of the seat chassis and improving the ease of use. The guide pin provides precise positioning and guidance for the locking plate and locking torsion spring, ensuring that the locking plate accurately engages with the locking gear assembly, improving the stability and reliability of the locking mechanism.

[0008] Preferably, one side of the locking plate engages with the locking gear assembly, and its bottom engages with the positioning groove via a guide pin. The engagement of the locking plate and the locking gear assembly enables reliable locking of the seat chassis, preventing accidental sliding or movement of the seat during use and ensuring user safety. The bottom of the locking plate, through the guide pin and engagement with the positioning groove, provides precise guidance and positioning for the movement of the locking plate, ensuring accurate engagement of the locking plate with each tooth of the locking gear assembly, improving locking accuracy and stability. This engagement method creates a collaborative whole between the locking plate, the locking gear assembly, and the positioning groove, enhancing the overall structural stability and reliability of the seat chassis and ensuring good locking performance under various usage conditions.

[0009] Preferably, the locking gear assembly consists of a base plate and multiple layers of gear blocks. The base plate has several mounting holes. Multiple gear blocks are stacked vertically, extend horizontally, and are parallel to each other, with grooves between adjacent blocks. The base plate can be securely mounted on the base plate through the mounting holes, providing a stable support foundation for the multiple layers of gear blocks and ensuring the installation stability of the locking gear assembly on the seat chassis, thus providing reliable support for seat locking. The multiple layers of gear blocks are stacked vertically, with grooves between adjacent blocks, allowing the locking plate to engage with gear blocks at different positions to achieve multi-level locking. Users can select different locking positions as needed to adjust the locking strength and stability of the seat to meet different usage requirements. The horizontal extension and parallel arrangement of the gear blocks, as well as the groove design between adjacent blocks, make the engagement between the locking plate and the gear blocks tighter and more reliable, effectively preventing the seat from loosening or slipping during use and improving seat safety.

[0010] Preferably, the elasticity adjustment mechanism includes an adjusting nut, a cup-shaped washer at the center of the inner wall of the adjusting nut, a compression spring at one end of the cup-shaped washer, a protective sleeve on the outside of the compression spring, and a screw above the base plate. One end of the screw passes through the compression spring, the cup-shaped washer, and the adjusting nut in sequence and connects to the adjusting nut. By rotating the adjusting nut, the compression degree of the compression spring can be changed, thereby adjusting the seat elasticity. Users can adjust the seat elasticity according to their own weight and usage habits to improve the comfort and adaptability of the seat. The cup-shaped washer can evenly distribute the pressure of the compression spring, preventing local deformation or damage to the compression spring during compression. The protective sleeve on the outside of the compression spring can protect the compression spring from the influence of the external environment, extend the service life of the compression spring, and ensure the long-term stable operation of the elasticity adjustment mechanism. The cooperation between the adjusting nut and the screw can achieve precise adjustment, and users can make fine adjustments according to actual needs to achieve the optimal elasticity of the seat and improve the performance of the seat.

[0011] The advantages of this utility model are: This utility model provides a highly safe and stable seat chassis, which significantly improves the overall performance of the seat in actual use through a multi-component collaborative structural design. Firstly, by rationally arranging U-shaped brackets and locking gears along the longitudinal axis of the base plate, and combining this with the connection method of the movable disc and connecting rivets, the overall structural regularity and ease of component installation and maintenance are ensured. Furthermore, the bushing design at the connection points effectively reduces friction and wear, enhances the long-term stability of the connection, and avoids safety hazards caused by loose connections. Secondly, the movable disc, as the core load-bearing component, has a tapered tube fixing plate and connecting tapered tube integrated on one side providing reference support for lifting and positioning functions. The elastic adjustment mechanism on the other side allows for flexible adjustment of the seat's cushioning elasticity to meet the personalized needs of different users for seat firmness. The lifting adjustment mechanism in the central area achieves precise adjustment of the seat height through mechanical linkage. Combined with the locking function of the locking adjustment mechanism, the seat can be quickly locked at any adjusted height to prevent accidental slippage and ensure safe use. In addition, the locking gear assembly adopts a stacked structure of base plate and multi-layer tooth blocks, which, together with the precise engagement of the locking plate, enables flexible switching of multiple levels of locking strength, which not only improves the reliability of locking but also adapts to the needs of different load scenarios. The elastic adjustment mechanism, through the cooperation of adjusting nut, cup-shaped washer, compression spring and protective sleeve, can not only accurately control the elastic force, but also protect the compression spring from environmental corrosion through the protective sleeve, thus extending the service life of the components. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the exploded structure of this utility model.

[0014] Figure 2 For the control of this utility model Figure 1 Enlarged view of I in the middle.

[0015] Figure 3 This is a schematic diagram of the initial locking structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the initial locking internal structure of this utility model.

[0017] Figure 5 This is a top view of the initial locking structure of this utility model.

[0018] Figure 6 This is a top-view schematic diagram of the control and relaxation structure of this utility model.

[0019] In the diagram: 1. Screw; 2. Base plate; 3. Locking gear assembly; 4. Guide pin; 5. Connecting rivet; 6. Positioning screw; 7. Lifting adjustment cable; 8. Lifting torsion spring; 9. Return spring; 10. Locking torsion spring; 11. Tapered tube fixing plate; 12. Locking plate; 13. Positioning slide; 14. Protective cover; 15. Adjusting nut; 16. Cup-shaped washer; 17. Compression spring; 18. Locking adjustment cable; 19. Protective sleeve; 20. Bushing; 21. Moving center plate; 22. Lifting adjustment block; 23. Gear groove; 24. Base plate; 25. Mounting hole; 26. U-shaped bracket; 27. Fixing seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0021] Please see Figure 1-6As shown, a high-safety and stable seat chassis includes a base plate 2, characterized in that: a U-shaped bracket 26 and a locking gear group 3 are respectively provided on the base plate 2 from front to back along the longitudinal axis; a movable disc 21 is provided below the base plate 2 and a connecting rivet 5 is provided at the connection point; a bushing 20 is provided at the connection point between the connecting rivet 5 and the movable disc 21; a cone tube fixing plate 11 is provided on one side of the movable disc 21; a positioning groove 13 is provided on one side of the cone tube fixing plate 11; a connecting cone tube is provided at the bottom of the cone tube fixing plate 11; an elastic adjustment mechanism is provided on the other side of the movable disc 21; a protective cover 14 is provided at the bottom of the elastic adjustment mechanism; a lifting adjustment mechanism is provided at the center of the movable disc 21 corresponding to the cone tube; and a locking adjustment mechanism is provided on one side of the lifting adjustment mechanism. Reasonable structural layout: By orderly arranging components such as U-shaped brackets and locking gear groups 3 on the base plate 2, the structure of the entire seat chassis is more regular, facilitating the installation of various components and subsequent maintenance operations; Enhanced connection stability: Connecting rivets 5 connect the base plate 2 and the movable disc 21, and bushings 20 are provided, which can effectively reduce friction and wear at the connection points, improve the stability and reliability of the connection, and ensure that the seat chassis will not pose a safety hazard due to loose connections during long-term use; High functional integration: The cone tube fixing plate 11, elastic adjustment mechanism, lifting adjustment mechanism, and locking adjustment mechanism are integrated into one unit, enabling the seat chassis to achieve multiple functions, such as height adjustment, elastic adjustment, and locking functions, to meet the user's needs for different use states of the seat; Provides a positioning basis: The positioning groove 13 on the cone tube fixing plate 11 provides a precise positioning basis for related components, which helps to improve the matching accuracy between various components, thereby improving the overall performance and stability of the seat chassis.

[0022] In this embodiment, the height adjustment mechanism includes a fixed base 27, a height adjustment block 22 connected to one side of the fixed base 27, a height adjustment spring 8 connected to one end of the height adjustment block 22, and a height adjustment cable 7 connected to one end of the height adjustment spring 8. By operating the height adjustment cable 7, the height adjustment spring 8 and the height adjustment block 22 can be moved, thereby adjusting the seat height. Users can easily adjust the seat to a suitable height according to their own needs, improving the comfort of use. The fixed base 27 provides a stable support foundation for the entire height adjustment mechanism, and the height adjustment spring 8 plays a buffering and balancing role during the adjustment process, making the seat height adjustment process smoother and avoiding sudden changes in height, thus improving the user experience.

[0023] In this embodiment, the locking adjustment mechanism includes a locking plate 12, a guide pin 4 is provided at the center of the locking plate 12, a locking torsion spring 10 is provided on the guide pin 4, a locking adjustment cable 18 is connected to the other side of the locking torsion spring 10, a positioning screw 6 that cooperates with the locking torsion spring 10 is provided at the center of the locking torsion spring 10, and a return spring 9 is provided between the positioning screw 6 and the locking adjustment cable 18. Pulling the locking adjustment cable 18 activates the locking plate 12 and the locking torsion spring 10, thereby adjusting the locking state of the seat chassis. Users can easily control the locking and unlocking of the seat as needed, facilitating its use and adjustment. The locking torsion spring 10 acts as an elastic buffer during the locking adjustment process, reducing the impact force between the locking plate 12 and the locking gear assembly 3, protecting related components from damage, and making the locking process smoother and more stable. The return spring 9 returns the locking plate 12 and the locking torsion spring 10 to their initial state after the tension on the locking adjustment cable 18 is released, enabling automatic locking or unlocking of the seat chassis and improving the convenience of using the seat chassis. The guide pin 4 provides precise positioning and guidance for the locking plate 12 and the locking torsion spring 10, ensuring that the locking plate 12 can accurately engage with the locking gear assembly 3, improving the stability and reliability of the locking.

[0024] In this embodiment, one side of the locking plate 12 engages with the locking tooth assembly 3, and its bottom engages with the positioning groove 13 via a guide pin 4. The engagement of the locking plate 12 with the locking tooth assembly 3 enables reliable locking of the seat chassis, preventing accidental sliding or movement of the seat during use and ensuring user safety. The bottom of the locking plate 12, through the guide pin 4 engaging with the positioning groove 13, provides precise guidance and positioning for the movement of the locking plate 12, ensuring that the locking plate 12 accurately engages with each tooth of the locking tooth assembly 3, improving locking accuracy and stability. This engagement method forms a collaborative whole between the locking plate 12, the locking tooth assembly 3, and the positioning groove 13, improving the overall structural stability and reliability of the seat chassis and ensuring good locking performance under various usage conditions.

[0025] In this embodiment, the locking gear assembly 3 is composed of a base plate 24 and multiple layers of gear blocks. The base plate 24 is provided with several mounting holes 25. Multiple gear blocks are stacked vertically, extend horizontally, and are parallel to each other, with tooth grooves 23 between adjacent gear blocks. The base plate 24 can be firmly installed on the base plate 2 through the mounting holes 25, providing a stable support foundation for the multiple layers of gear blocks and ensuring the installation stability of the locking gear assembly 3 on the seat chassis, thereby providing reliable support for the locking of the seat. The multiple layers of gear blocks are stacked vertically, and the tooth grooves 23 between adjacent gear blocks allow the locking plate 12 to cooperate with gear blocks at different positions to achieve multi-level locking function. Users can select different locking positions as needed to adjust the locking strength and stability of the seat to meet different usage requirements. The horizontal extension and parallel arrangement of the gear blocks, as well as the design of the tooth grooves 23 between adjacent gear blocks, make the cooperation between the locking plate 12 and the gear blocks tighter and more reliable, effectively preventing the seat from loosening or slipping during use and improving the safety of the seat.

[0026] In this embodiment, the elasticity adjustment mechanism includes an adjusting nut 15, with a bowl-shaped washer 16 at the center of its inner wall. A compression spring 17 is located at one end of the bowl-shaped washer 16, and a protective sleeve 19 is located on the outer side of the compression spring 17. A screw 1 is located above the base plate 2, with one end of the screw 1 passing sequentially through the compression spring 17, the bowl-shaped washer 16, and the adjusting nut 15, and connecting to the adjusting nut 15. By rotating the adjusting nut 15, the compression degree of the compression spring 17 can be changed, thereby adjusting the seat elasticity. Users can adjust the seat elasticity according to their own weight and usage habits, improving the seat's comfort and adaptability. The bowl-shaped washer 16 can evenly distribute the pressure of the compression spring 17, preventing local deformation or damage to the compression spring 17 during compression. The outer sheath 19 of the compression spring 17 can protect the compression spring 17 from the influence of the external environment, extend the service life of the compression spring 17, and ensure the long-term stable operation of the elasticity adjustment mechanism. The cooperation between the adjusting nut 15 and the screw 1 can achieve precise adjustment. Users can make fine adjustments according to actual needs to make the elasticity of the seat reach the best state and improve the performance of the seat.

[0027] The implementation principle of this embodiment is as follows: Height Adjustment Function: When the user needs to adjust the seat height, the lifting adjustment cable 7 connected to the lifting adjustment mechanism is operated. The cable drives the lifting torsion spring 8 to retract and drives the lifting adjustment block 22 to move along the fixed seat 27. The movement of the lifting adjustment block 22 is transmitted mechanically to the connecting tapered tube, pushing the movable disc 21 to move up and down relative to the base plate 2 along the longitudinal axis, thereby changing the overall height of the seat. Because the tapered tube fixed plate 11 has a positioning groove 13 on one side, the movable disc 21 maintains stable vertical guidance during the lifting process through the cooperation between the tapered tube and the base plate 2, avoiding deviation or shaking. Elasticity Adjustment Function: The elasticity adjustment mechanism is used to adjust the cushioning elasticity between the seat surface and the chassis. The user rotates the adjustment knob connected to the adjustment nut 15, causing the adjustment nut 15 to move axially along the screw 1. This movement of the adjustment nut 15 changes its relative position to the cup-shaped washer 16, thereby compressing or releasing the compression spring 17. When the compression of the compression spring 17 increases, its supporting elasticity on the movable disc 21 strengthens; conversely, the elasticity weakens. The cup-shaped washer 16, in this process, evenly distributes the pressure of the compression spring 17, preventing localized stress concentration that could lead to deformation of the compression spring 17, and ensuring the linearity and stability of the elasticity adjustment.

[0028] Locking function: After the seat is adjusted to the target height, the position is locked by the locking adjustment mechanism to prevent sliding. In the default state, the locking plate 12 is engaged with the locking gear group 3 under the action of the locking torsion spring 10. One side of the locking plate 12 cooperates with the positioning groove 13 on the tapered tube fixing plate 11 through the guide pin 4 to ensure its movement trajectory is accurate; the other side is engaged with the multi-layer toothed blocks of the locking gear group 3. At this time, the locking plate 12 is embedded in the tooth groove 23 of the toothed block, preventing the moving plate 21 from moving up and down relative to the base plate 2, thereby fixing the height of the seat 27.

[0029] Unlocking Function: To readjust the height, the user pulls the unlocking handle connected to the locking adjustment cable 18. The cable causes the locking torsion spring 10 to twist and push the locking plate 12 out of the tooth groove 23 of the locking gear assembly 3. Guided by the guide pin 4, the locking plate 12 moves horizontally along the positioning slide groove 13, disengaging from the gear block. At this time, the movable disc 21 can freely rise and fall along the longitudinal axis. When the unlocking handle is released, the return spring 9 pushes the locking torsion spring 10 to reset, and the locking plate 12 re-engages with the tooth groove 23 of the locking gear assembly 3, completing the secondary locking.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-safety-stability seat chassis, comprising a base plate (2), characterized in that: The base plate (2) is provided with a U-shaped bracket (26) and a locking gear group (3) from front to back along the longitudinal axis. The base plate (2) is provided with a movable disc (21) and a connecting rivet (5) at the connection point. The connecting rivet (5) and the movable disc (21) are respectively provided with bushings (20). The movable disc (21) is provided with a tapered tube fixing plate (11) on one side. The tapered tube fixing plate (11) is provided with a positioning groove (13) on one side. The tapered tube fixing plate (11) is provided with a connecting tapered tube at the bottom. The movable disc (21) is provided with an elastic adjustment mechanism on the other side. The elastic adjustment mechanism is provided with a protective cover (14) at the bottom. The movable disc (21) is provided with a lifting adjustment mechanism at the center corresponding to the tapered tube. The lifting adjustment mechanism is provided with a locking adjustment mechanism on one side.

2. The high safety and stability seat chassis according to claim 1, characterized in that: The lifting adjustment mechanism includes a fixed base (27), a lifting adjustment block (22) is connected to one side of the fixed base (27), a lifting torsion spring (8) is connected to one end of the lifting adjustment block (22), and a lifting adjustment cable (7) is connected to one end of the lifting torsion spring (8).

3. The high safety and stability seat chassis according to claim 1, characterized in that: The locking adjustment mechanism includes a locking plate (12), a guide pin (4) is provided at the center of the locking plate (12), a locking torsion spring (10) is provided on the guide pin (4), a locking adjustment cable (18) is connected to the other side of the locking torsion spring (10), a positioning screw (6) that cooperates with the locking torsion spring (10) is provided at the center of the locking torsion spring (10), and a return spring (9) is provided between the positioning screw (6) and the locking adjustment cable (18).

4. A high-safety-stability seat chassis according to claim 3, characterized in that: The locking piece (12) is engaged with the locking tooth assembly (3) on one side and with the positioning slide groove (13) at the bottom via the guide pin (4).

5. A high-safety-stability seat chassis according to claim 1, characterized in that: The locking tooth assembly (3) is composed of a base plate (24) and multiple tooth blocks. The base plate (24) is provided with several mounting holes (25). Multiple tooth blocks are stacked in sequence along the vertical direction, extend horizontally and are parallel to each other, and tooth grooves (23) are provided between adjacent tooth blocks.

6. A high-safety-stability seat chassis according to claim 1, characterized in that: The elastic adjustment mechanism includes an adjusting nut (15), a bowl-shaped washer (16) is provided at the center of the inner wall of the adjusting nut (15), a compression spring (17) is provided at one end of the bowl-shaped washer (16), a protective sleeve (19) is provided on the outside of the compression spring (17), and a screw (1) is provided above the base plate (2). One end of the screw (1) passes through the compression spring (17), the bowl-shaped washer (16) and the adjusting nut (15) in sequence and is connected to the adjusting nut (15).

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