A tilt angle adjustable by-wire seat chassis

Abstract

The utility model relates to a seat chassis technical field especially is a kind of line control seat chassis of adjustable reclining angle, including bottom plate, it is characterized by: the bottom of bottom plate is equipped with movable seat, the movable seat center is equipped with conical tube fixed plate, connecting spinal canal is equipped below the conical tube fixed plate, movable seat inside one side is equipped with reclining adjustment mechanism, the reclining adjustment mechanism includes pre-tightening spring, pre-tightening spring one end is connected with angle adjustment torsional spring, angle adjustment torsional spring bottom is equipped with torsional spring pedestal, torsional spring pedestal one end is connected with angle adjustment block, pre-tightening spring one end is connected with angle adjustment pull line, the reclining adjustment mechanism one side is equipped with lifting adjustment mechanism, the utility model provides a kind of line control seat chassis of adjustable reclining angle, realizes multi-angle reclining adjustment and line control operation by pre-tightening spring and torsional spring combination, and the comfort and the operation convenience are improved;Lifting torsional spring and pull line cooperation realize accurate lifting.

Description

Technical Field

[0001] This utility model relates to the field of seat chassis technology, and in particular to a drive-by-wire seat chassis with adjustable tilt angle. Background Technology

[0002] With the continuous improvement of modern office environments and home living standards, people have placed higher demands on the comfort, functionality, and ergonomic design of chairs. As the primary support tool for prolonged sitting during work or rest, the adjustable functions of chairs, especially the backrest tilt angle and seat height, directly affect the user's posture health, fatigue relief, and operational experience. Traditional chair chassis typically only offer simple fixed support, or can only adjust the backrest angle or seat height through basic manual knobs or levers. This is not only complex to operate and lacks precision, but also makes it difficult to achieve accurate multi-angle positioning and wired operation, failing to meet users' needs for comfort and personalization. Especially in modern high-end office chairs, gaming chairs, and professional ergonomic chairs, users expect easy-to-use controls to freely adjust the chair's tilt angle and height to adapt to different usage scenarios and physical conditions. However, existing seat chassis generally suffer from problems such as complex structure but single function, scattered and uncoordinated adjustment mechanisms, laborious operation or inaccurate feedback, easy to produce abnormal noise or jamming during adjustment, and decreased stability after long-term use. It is difficult to achieve precise wire control and linkage adjustment of tilt and height functions while ensuring structural compactness and reliability, which restricts the improvement of the overall user experience of the seat.

[0003] Chinese patent discloses a wire-controlled seat chassis (publication number: CN 209018137 U) including a chassis, a tail plate, a fixed plate, a first rotating shaft, a second rotating shaft, and a third rotating shaft. The chassis and the fixed plate are rotatably connected via the first rotating shaft, the chassis and the tail plate are rotatably connected via the second rotating shaft, and the tail plate and the fixed plate are rotatably connected via the third rotating shaft. The chassis has a reclining elastic adjustment mechanism, a reclining locking mechanism, and a lifting mechanism. However, this type of seat chassis has problems such as scattered adjustment functions, inconvenient operation, poor structural stability, insufficient adjustment accuracy and feel, and difficulty in achieving precise wire control and comfortable multi-angle reclining and lifting adjustment. Therefore, a wire-controlled seat chassis with adjustable reclining angle is needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of existing seat chassis, such as scattered adjustment functions, inconvenient operation, poor structural stability, insufficient adjustment accuracy and feel, and difficulty in achieving precise wire control and comfortable multi-angle tilt and height adjustment. Therefore, a wire-controlled seat chassis with adjustable tilt angle is proposed.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A wire-controlled seat chassis with adjustable tilt angle, comprising a base plate, characterized in that: a movable seat is provided at the bottom of the base plate; a conical tube fixing plate is provided at the center of the movable seat; a connecting conical tube is provided below the conical tube fixing plate; a tilt adjustment mechanism is provided on one side inside the movable seat; the tilt adjustment mechanism includes a pre-tension spring; one end of the pre-tension spring is connected to an angle adjustment torsion spring; a torsion spring base is provided at the bottom of the angle adjustment torsion spring; an angle adjustment block is connected to one end of the torsion spring base; both the torsion spring base and the angle adjustment block cooperate with the movable seat; multiple screws are provided between the torsion spring base and the movable seat; one end of the pre-tension spring is connected to an angle adjustment cable; a lifting adjustment mechanism is provided on one side of the tilt adjustment mechanism; a rivet is provided at the connection between the movable seat and the base plate; and a bushing is provided at the connection between the rivet and the movable seat. This technical solution, through the setting of a tilt adjustment mechanism, utilizes a combination of pre-tension springs and angle-adjusting torsion springs to achieve flexible adjustment and stable support of the seat back tilt angle, improving the user's comfort experience in different sitting postures. The cooperative design of the torsion spring base, angle adjustment block, and movable seat allows the tilt angle to be positioned in multiple stages or continuously, meeting the personalized needs of different users. The use of an angle adjustment cable for wired operation makes tilt adjustment more convenient and user-friendly, avoiding the cumbersome traditional manual adjustment. The movable seat and the base plate are connected by rivets and bushings, which not only ensures the relative mobility between the two but also reduces friction and wear, improving the smoothness of adjustment and service life.

[0006] Preferably, the lifting adjustment mechanism includes a lifting torsion spring, one end of which is connected to a lifting cable. A linkage adjustment block is provided on one side of the top of the lifting torsion spring, and the linkage adjustment block cooperates with a rivet. By setting an independent lifting adjustment mechanism, the seat height adjustment function and tilt adjustment function are separated but integrated into the same chassis structure, resulting in a reasonable structural layout and no interference between operations. The combination of the lifting torsion spring and the lifting cable enables wired height adjustment, improving the convenience of seat height adjustment for users. The cooperative design of the linkage adjustment block and the rivet ensures that the lifting action can be effectively transmitted and converted into the vertical displacement of the seat, ensuring the stability and reliability of the lifting process and enhancing the overall coordination of the adjustment mechanism.

[0007] Preferably, the linkage adjustment sleeve is provided with a first protrusion and a second protrusion. The first protrusion is associated with the lifting torsion spring, and the second protrusion is concentrically and coaxially arranged with the connecting tapered tube. By providing two protrusions with different functions on the linkage adjustment sleeve, precise cooperation and motion guidance between the lifting torsion spring and the connecting tapered tube are achieved, ensuring a clear and stable force transmission path during the lifting adjustment process. The associated design of the first protrusion and the lifting torsion spring allows the elastic effect of the torsion spring to be effectively utilized, improving the smoothness and feedback of the lifting operation. The concentric and coaxial arrangement of the second protrusion and the connecting tapered tube enhances the coaxiality and motion accuracy of the overall structure, avoids skewness or jamming, and improves the reliability of the lifting function and the user experience.

[0008] Preferably, both the lifting cable and the angle adjustment cable are equipped with fixing blocks at their connections to the movable seat. By setting fixing blocks at the cable connections, loosening, shifting, or detachment of the cables during use is effectively prevented, ensuring the stability and accuracy of the cable transmission. The fixing blocks also improve the reliability of the connection between the cable and the movable seat, allowing users to obtain more precise control feedback when operating the tilt or lifting functions, thus enhancing the user experience and safety of the wired adjustment.

[0009] Preferably, the movable seat has multiple compression springs on one side, with two springs arranged correspondingly. Each spring has a fixed base at its bottom and a fixed pressure block at its top, with one end of the fixed pressure block engaging with the angle adjustment block. By setting a pair of corresponding compression springs and fixed pressure blocks, auxiliary elastic support and limiting functions are provided for the angle adjustment block, enhancing its stability and responsiveness during tilt adjustment. The spring design provides gentle resistance or rebound force during adjustment, improving the user's handling when adjusting the tilt angle. The cooperation between the fixed pressure block and the angle adjustment block further ensures accurate positioning during adjustment, preventing over-adjustment or accidental slippage, and improving the overall reliability of the adjustment mechanism.

[0010] Preferably, multiple circular contact points are provided at the connection between the base plate and the movable seat around their perimeter. By setting multiple circular contact points between the base plate and the movable seat, the contact method between the two is optimized, reducing friction and wear caused by direct surface-to-surface contact, and improving the flexibility and smoothness of the movable seat's movement relative to the base plate. The circular contact point design makes the movable seat more evenly stressed and more stable during tilting or movement, enhancing user comfort. This structure also helps improve the overall durability and stability of the structure, extending the service life of the seat chassis.

[0011] The advantages of this utility model are: This utility model provides a wire-controlled seat chassis with adjustable tilt angle. Through innovative structural design, it achieves precise, convenient, and wired adjustment of the seat back tilt angle and seat cushion height, significantly improving the user experience and ease of operation. The tilt adjustment mechanism employs a combination of a pre-tension spring and an angle adjustment torsion spring, working in conjunction with the linkage between the torsion spring base and the angle adjustment block. This provides users with stable yet gentle tilt support and enables multi-angle or continuous tilt position adjustment and positioning, allowing users to flexibly adjust their sitting posture according to their needs, effectively relieving fatigue from prolonged sitting and improving comfort. Simultaneously, the angle adjustment cable enables wired operation, replacing the traditional manual adjustment method, making tilt adjustment easier, more intuitive, and more user-friendly. The height adjustment mechanism, through the cooperation of the lifting torsion spring and lifting cable, combined with the precise linkage of the linkage adjustment sleeve and rivets, achieves wired height adjustment of the seat cushion, allowing users to easily adjust the seat to the optimal height according to ground height, desktop position, or personal habits, further enhancing the seat's adaptability and functionality. Furthermore, the chassis uses compression springs and fixed blocks to provide auxiliary support and limit the angle adjustment blocks, improving stability and operation during tilt adjustment, preventing over-adjustment or accidental slippage, and ensuring accurate stopping at the target position after each adjustment. The movable seat and the base plate are connected by rivets and bushings, and multiple circular contact points are set on the edge, which not only reduces friction and wear during relative movement, but also improves the smoothness and structural durability of tilt and rise movements, making the entire adjustment process smoother and quieter, and extending service life. 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 This is a schematic diagram of the initial locking structure of this utility model.

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

[0016] Figure 4 This utility model Figure 3 A schematic diagram of the cross-sectional structure of AA.

[0017] Figure 5This is a schematic diagram of the unlocked tilting structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the unlocked, tilted-down structure of this utility model.

[0019] Figure 7 This utility model Figure 6 Schematic diagram of the cross-sectional structure of BB.

[0020] Figure 8 This is a schematic diagram of the lifting structure of this utility model.

[0021] Figure 9 This is a top-view schematic diagram of the lifting structure of this utility model.

[0022] Figure 10 This utility model Figure 9 A cross-sectional view of the CC structure.

[0023] In the diagram: 1. Base plate; 2. Circular contact point block; 3. Fixing block; 4. Compression spring; 5. Fixing base; 6. Angle adjustment cable; 7. Lifting cable; 8. Rivet; 9. Angle adjustment block; 10. Angle adjustment torsion spring; 11. Screw; 12. Preload spring; 13. Torsion spring base; 14. Movable seat; 15. Conical tube fixing plate; 16. Connecting conical tube; 17. Bushing; 18. Lifting torsion spring; 19. Linkage adjustment sleeve block; 20. Second protrusion; 21. First protrusion. Detailed Implementation

[0024] 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

[0025] Please see Figure 1-10As shown, a tilt-adjustable wire-controlled seat chassis includes a base plate 1. The base plate 1 has a movable seat 14 at its bottom, a conical tube fixing plate 15 at its center, a connecting conical tube 16 below the conical tube fixing plate 15, a tilt adjustment mechanism on one side of the movable seat 14, the tilt adjustment mechanism including a pre-tension spring 12, an angle adjustment torsion spring 10 connected to one end of the pre-tension spring 12, a torsion spring base 13 at the bottom of the angle adjustment torsion spring 10, an angle adjustment block 9 connected to one end of the torsion spring base 13, both the torsion spring base 13 and the angle adjustment block 9 cooperating with the movable seat 14, multiple screws 11 between the torsion spring base 13 and the movable seat 14, an angle adjustment cable 6 connected to one end of the pre-tension spring 12, a lifting adjustment mechanism on one side of the tilt adjustment mechanism, rivets 8 at the connection between the movable seat 14 and the base plate 1, and bushings 17 at the connection between the rivets 8 and the movable seat 14. This technical solution, through the setting of a tilt adjustment mechanism, utilizes a combination of a pre-tension spring 12 and an angle adjustment torsion spring 10 to achieve flexible adjustment and stable support of the seat back tilt angle, improving the user's comfort experience in different sitting postures. The cooperative design of the torsion spring base 13, the angle adjustment block 9, and the movable seat 14 allows the tilt angle to be positioned in multiple stages or continuously, meeting the personalized needs of different users. The use of an angle adjustment cable 6 for wired operation makes tilt adjustment more convenient and user-friendly, avoiding the cumbersome traditional manual adjustment. The movable seat 14 and the base plate 1 are connected by rivets 8 and bushings 17, which not only ensures the relative mobility between the two but also reduces friction and wear, improving the smoothness of adjustment and service life.

[0026] In this embodiment, the lifting adjustment mechanism includes a lifting torsion spring 18, one end of which is connected to a lifting cable 7. A linkage adjustment block 19 is provided on one side of the top of the lifting torsion spring 18, and the linkage adjustment block 19 cooperates with a rivet 8. By setting an independent lifting adjustment mechanism, the seat height adjustment function and tilt adjustment function are separated but integrated into the same chassis structure, resulting in a reasonable structural layout and no interference between operations. The combination of the lifting torsion spring 18 and the lifting cable 7 realizes wired height adjustment, improving the convenience of users adjusting the seat height. The cooperative design of the linkage adjustment block 19 and the rivet 8 ensures that the lifting action can be effectively transmitted and converted into the vertical displacement of the seat, ensuring the stability and reliability of the lifting process and enhancing the overall coordination of the adjustment mechanism.

[0027] In this embodiment, the linkage adjustment sleeve 19 is provided with a first protrusion 21 and a second protrusion 20. The first protrusion 21 is associated with the lifting torsion spring 18, and the second protrusion 20 is concentrically and coaxially arranged with the connecting tapered tube. By setting two protrusions with different functions on the linkage adjustment sleeve 19, the precise cooperation and motion guidance between the lifting torsion spring 18 and the connecting tapered tube are realized, ensuring that the force transmission path is clear and stable during the lifting adjustment process. The associated design of the first protrusion 21 and the lifting torsion spring 18 allows the elastic effect of the torsion spring to be effectively utilized, improving the smoothness and feedback of the lifting operation. The concentric and coaxial arrangement of the second protrusion 20 and the connecting tapered tube enhances the coaxiality and motion accuracy of the overall structure, avoids skewness or jamming, and improves the reliability of the lifting function and the user experience.

[0028] In this embodiment, both the lifting cable 7 and the angle adjustment cable 6 are equipped with fixing blocks at their connections to the movable seat 14. By setting fixing blocks at the cable connections, loosening, shifting, or detachment of the cables during use is effectively prevented, ensuring the stability and accuracy of the cable transmission. The fixing blocks also improve the reliability of the connection between the cable and the movable seat 14, allowing users to obtain more precise control feedback when operating the tilt or lifting functions, thus enhancing the user experience and safety of the wired adjustment.

[0029] In this embodiment, a plurality of compression springs 4 are provided on one side inside the movable seat 14. There are two compression springs 4 arranged in a corresponding manner. A fixed base 5 is provided at the bottom of the compression spring 4, and a fixed pressure block 3 is provided at the top of the compression spring 4. One end of the fixed pressure block 3 cooperates with the angle adjustment block 9. By setting a pair of correspondingly configured compression springs 4 and fixed pressure blocks 3, auxiliary elastic support and limiting function are provided for the angle adjustment block 9, which enhances the stability and responsiveness of the angle adjustment block 9 during tilt adjustment. The design of the compression springs 4 can provide gentle resistance or rebound force during adjustment, which improves the user's operating feel when adjusting the tilt angle. The cooperation between the fixed pressure block 3 and the angle adjustment block 9 further ensures the positioning accuracy during adjustment, avoids over-adjustment or accidental slippage, and improves the functional reliability of the overall adjustment mechanism.

[0030] In this embodiment, multiple circular contact point blocks 2 are provided at the connection points of the base plate 1 and the movable seat 14 around their perimeter. By setting multiple circular contact point blocks 2 between the base plate 1 and the movable seat 14, the contact method between the two is optimized, reducing friction and wear caused by direct surface-to-surface contact, and improving the flexibility and smoothness of the movement of the movable seat 14 relative to the base plate 1. The design of the circular contact points makes the movable seat 14 more evenly stressed and more stable during tilting or movement, enhancing the user's comfort during use. This structure also helps to improve the overall durability and stability of the structure and extend the service life of the seat chassis.

[0031] The implementation principle of this embodiment is as follows: When the user needs to adjust the recline angle of the seat back, they can manually pull the angle adjustment cable 6 connected to the recline adjustment mechanism. One end of the cable is connected to the preload spring 12, and the other end, after a series of transmissions, acts on the angle adjustment torsion spring 10 and the torsion spring base 13 assembly. The preload spring 12 provides initial elastic tension, ensuring that the seat back is in the default upright or preset angle when no external force is applied. It also provides a certain amount of rebound force and damping feel throughout the adjustment process, improving the operating feel. The angle adjustment torsion spring 10 is the core elastic element for recline adjustment. When the cable is pulled, the torsion spring deforms, storing elastic potential energy, thereby driving the torsion spring base 13 and the angle adjustment block 9 connected to it. The relative displacement is generated, which in turn pushes the movable seat 14 to rotate at a tilt angle relative to the base plate 1; the torsion spring base 13 and the angle adjustment block 9: these two components maintain a movable or positioning relationship with the movable seat 14. Under the action of the torsion spring, they can guide the movable seat 14 to tilt around a certain rotation center (usually the center of the rivet 8 or the tapered tube fixing plate 15) to achieve the backrest tilting or resetting; the fixing block 3 and the compression spring 4: are set inside the movable seat 14 and cooperate with the angle adjustment block 9 to play an auxiliary limiting and supporting role, ensuring that the tilting process will not be over-adjusted or unstable due to excessive force or structural loosening. At the same time, it also optimizes the adjustment feel and makes the tilting process more linear and controllable.

[0032] The seat height adjustment is achieved through a separate height adjustment mechanism, which mainly includes a height adjustment torsion spring 18, a height adjustment cable 7, and a linkage adjustment block 19. The height adjustment torsion spring 18, as an elastic drive component for the height adjustment action, generates corresponding extension or restoring force when the cable is pulled or released, supporting the seat cushion's rise or fall. The height adjustment cable 7, similar to the tilt cable, is a wired input component; the user triggers the height adjustment torsion spring 18 by pulling the cable. The linkage adjustment block 19 is a key intermediate component for transmitting and converting the height adjustment action. Its first protrusion 21 is directly connected to the height adjustment torsion spring 18, receiving the spring's driving force and converting it into the seat cushion's height adjustment movement. The second protrusion 20 is concentric and coaxial with the connecting tapered tube, ensuring directional accuracy and structural stability during motion transmission and preventing skewing or jamming.

[0033] When the user operates the lifting cable 7, the force is transmitted to the lifting torsion spring 18 through the linkage adjustment block 19. The torsion spring deforms or returns to its original position, thereby pushing the movable seat 14 (or the seat cushion support structure connected to it) to displace in the vertical direction, realizing the raising or lowering of the seat. In this process, the cooperation between the linkage block and the rivet 8 ensures the precise transmission of the lifting action, while the fixing block ensures that the cable is always in the correct position, preventing loosening or deviation, and ensuring the reliability of the lifting adjustment; the compression spring 4 and the fixed base 5 provide a certain degree of buffering and rebound assistance for the entire adjustment system, making the adjustment process smoother and more linear, and enhancing the comfort feedback when the user operates.

[0034] 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.

[0035] 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 tilt-adjustable drive-by-wire seat chassis, comprising a base plate (1), characterized in that: The bottom of the base plate (1) is provided with a movable seat (14), and a cone tube fixing plate (15) is provided at the center of the movable seat (14). A connecting cone tube (16) is provided below the cone tube fixing plate (15). A tilt adjustment mechanism is provided on one side inside the movable seat (14). The tilt adjustment mechanism includes a preload spring (12). One end of the preload spring (12) is connected to an angle adjustment torsion spring (10). A torsion spring base (13) is provided at the bottom of the angle adjustment torsion spring (10). One end of the torsion spring base (13) is connected to... An angle adjustment block (9) is connected. The torsion spring base (13) and the angle adjustment block (9) are both matched with the movable seat (14). Multiple screws (11) are provided between the torsion spring base (13) and the movable seat (14). An angle adjustment cable (6) is connected to one end of the pre-tightening spring (12). A lifting adjustment mechanism is provided on one side of the tilt adjustment mechanism. A rivet (8) is provided at the connection between the movable seat (14) and the base plate (1). A bushing (17) is provided at the connection between the rivet (8) and the movable seat (14).

2. The tilt-adjustable drive-by-wire seat chassis according to claim 1, characterized in that: The lifting adjustment mechanism includes a lifting torsion spring (18), one end of which is connected to a lifting pull wire (7), and a linkage adjustment sleeve (19) is provided on one side of the top of the lifting torsion spring (18), which cooperates with the rivet (8).

3. The tilt-adjustable drive-by-wire seat chassis according to claim 2, characterized in that: The linkage adjustment sleeve (19) is provided with a first protrusion (21) and a second protrusion (20). The first protrusion (21) is associated with the lifting torsion spring (18), and the second protrusion (20) is coaxially arranged with the connecting tapered tube.

4. The tilt angle adjustable drive-by-wire seat chassis according to claim 2, characterized in that: The lifting cable (7) and the angle adjustment cable (6) are both equipped with fixing blocks at the connection points with the movable seat (14).

5. The tilt-adjustable drive-by-wire seat chassis according to claim 1, characterized in that: The movable seat (14) has multiple compression springs (4) on one side inside. There are two compression springs (4) and they are arranged in a corresponding manner. The bottom of the compression spring (4) is provided with a fixed base (5) and the top of the compression spring (4) is provided with a fixed pressure block (3). One end of the fixed pressure block (3) is engaged with the angle adjustment block (9).

6. The tilt angle adjustable drive-by-wire seat chassis according to claim 1, characterized in that: Multiple circular contact point blocks (2) are provided at the connection between the base plate (1) and the movable seat (14) around the perimeter.

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