Multi-posture adjustable seat

Abstract

The utility model relates to the technical field of seat, disclose a kind of multi-posture adjustment seat of seat, including rack;Seat body, the seat body includes respectively with the front end and rear end of the rack hinged, and the front end is hinged with the rack by connecting rod structure, and the connecting rod structure includes first connecting rod and second connecting rod that are hinged and form hinged point;First drive assembly, the first drive assembly is installed on the second connecting rod, and is hinged with the first connecting rod or the hinged point connection, and the first drive assembly can drive the first connecting rod and the second connecting rod relative rotation, and make the front end lift or lower.Effective of the utility model is in, simple structure, stable operation and can realize large-angle adjustment.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a multi-posture adjustable seat. Background Technology

[0002] To meet people's pursuit of seating comfort, some existing seats integrate "zero-gravity" adjustment and height adjustment functions to achieve multi-posture adjustment. The zero-gravity adjustment function is mainly achieved by a lead screw motor driving a linkage structure. In traditional designs, one end of the lead screw motor is fixed to the frame, and the other end is connected to the linkage mechanism. The extension and retraction of the lead screw drives the linkage to deform, thereby changing the seat angle. However, in this structure, the drive unit must directly resist the entire gravitational torque generated by the weight of the human body and the seat itself, resulting in excessive driving force. A high-power motor is required to achieve adjustment, which not only increases production costs but also leads to poor operational stability. To address this issue, some existing technologies reduce the required thrust to some extent by setting a drive connection point on the seat body, using a force couple to achieve a labor-saving effect. However, due to the limitation of the motion path, the maximum tilt angle that this type of structure can achieve is still relatively limited, making it difficult to meet the large-angle reclining adjustment requirements of the "zero-gravity posture." Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a multi-posture adjustable seat that is simple in structure, stable in operation and can achieve large-angle adjustment.

[0004] The technical solution adopted by this utility model to solve its technical problem is to provide a multi-posture adjustable seat, including:

[0005] frame;

[0006] The seat body includes a front end and a rear end that are respectively hinged to the frame, and the front end is hinged to the frame through a linkage structure, the linkage structure including a first link and a second link that are hinged to each other and form a hinge point;

[0007] A first drive assembly is mounted on the second link and is hinged to or connected to the hinge point of the first link. The first drive assembly can drive the first link and the second link to rotate relative to each other and raise or lower the front end.

[0008] In the aforementioned multi-posture adjustable seat, the first drive component is a lead screw motor, an angle adjuster assembly, or a toothed plate drive assembly; when the first drive component is a lead screw motor, the output end of the first drive component is hinged to the first connecting rod; when the first drive component is an angle adjuster assembly and a toothed plate drive assembly, the output end of the first drive component is connected to the hinge point.

[0009] In the aforementioned multi-posture adjustable seat, one end of the first link is hinged to the seat body, and the other end extends toward the frame. One end of the second link is hinged to the extension end of the first link to form the hinge point, and the other end extends away from the first link and is hinged to the frame.

[0010] In the aforementioned multi-posture adjustable seat, when the first drive component is the lead screw motor, it includes a first motor base, a first lead screw, and a first bushing. The first motor base is mounted on the second connecting rod and is hinged to the second connecting rod. The first lead screw is disposed on the first motor base and extends toward the first connecting rod. The first bushing is rotatably sleeved on the extended end of the first lead screw and is hinged to the first connecting rod.

[0011] In the aforementioned multi-posture adjustable seat, the first bushing includes a fixing frame and a sleeve. The fixing frame is hinged to the first connecting rod and has a mounting groove communicating with the outside. The sleeve is fixed in the mounting groove.

[0012] In the aforementioned multi-posture adjustable seat, when the first drive component is the angle adjuster component, it includes a second motor base, a rotating gear, and a rotating shaft. The second motor base is mounted on the second connecting rod, the rotating gear is rotatably mounted at the hinge point, one end of the rotating shaft is connected to the output end of the second motor base, and the other end passes through the rotating gear.

[0013] In the aforementioned multi-posture adjustable seat, the linkage structure is provided in two sets and is arranged at intervals along the width direction of the seat body. The rotating gear and the second motor base are both provided in two sets, and the two ends of the rotating shaft are respectively passed through the two sets of rotating gears.

[0014] In the aforementioned multi-posture adjustable seat, the first link is provided with a first limiting structure, which protrudes from the periphery of the first link toward the direction closer to the second link. The second link is provided with a second limiting structure, which protrudes from the surface of the second link toward the direction closer to the first link. When the first link rotates relative to the second link to a preset position, the first limiting structure abuts against the second limiting structure and can restrict the first link from continuing to rotate in the original direction.

[0015] In the aforementioned multi-posture adjustable seat, the rear end of the seat body is hinged to the frame via a third link, and the front end of the seat body is hinged to a second drive assembly. The second drive assembly extends toward the third link and is hinged to the third link, and the second drive assembly can drive the front end and rear end of the seat body to rise or fall synchronously.

[0016] In the aforementioned multi-posture adjustable seat, the second drive assembly includes a third motor mount, a second lead screw, and a second bushing. The third motor mount is hinged to the front end of the seat body. The second lead screw is disposed on the third motor mount and extends toward the third connecting rod. The second bushing is rotatably sleeved on the extended end of the second lead screw and hinged to the third connecting rod. The rear end of the seat body is provided with a connecting shaft extending along its own width direction. The third connecting rod is rotatably connected to the connecting shaft.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. In this utility model, the linkage structure includes a first linkage and a second linkage that are hinged to each other and form a hinge point. A first drive assembly is mounted on the second linkage and is hinged to the first linkage or connected to the hinge point of the first and second linkages. The first drive assembly can drive the first and second linkages to rotate relative to each other, thereby raising or lowering the front end of the seat body. This design not only significantly reduces the thrust required by the first drive assembly by utilizing the principle of force couple, achieving a force-saving effect, but also unlocks a larger movement path because the first drive assembly moves with the linkage, allowing the seat to achieve a tilt angle far exceeding that of traditional force-saving structures, thus achieving both force-saving and large-angle adjustment.

[0019] 2. In this utility model, the first driving component is a lead screw motor, an angle adjuster assembly, or a gear plate drive assembly. When the first driving component is a lead screw motor, its output end is hinged to the first connecting rod. When the first driving component is both an angle adjuster assembly and a gear plate drive assembly, its output end is hinged to the hinge point of the first and second connecting rods. This design, by adapting to the output characteristics and optimal force application of different driving components, provides diverse driving solutions to meet different cost and performance requirements. Furthermore, the optimized force transmission path ensures transmission efficiency and reliability under various configurations, enhancing the product's design flexibility and market adaptability.

[0020] 3. In this utility model, the second connecting rod is provided with a first limiting structure, which protrudes from the surface of the second connecting rod toward the direction closer to the first connecting rod. The first connecting rod is provided with a second limiting structure, which protrudes from the periphery of the first connecting rod toward the direction closer to the second connecting rod. When the first connecting rod rotates relative to the second connecting rod to a preset position, the first limiting structure abuts against the second limiting structure, thus restricting the first connecting rod from continuing to rotate in the original direction. This design provides a reliable constraint on the range of motion of the connecting rod structure through mechanical hard limiting, effectively preventing mechanism collisions, component damage, or drive system overload caused by overtravel, and significantly improving the safety and durability of the system. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0022] Figure 2 for Figure 2 A structural diagram from another perspective.

[0023] Figure 3 This is an exploded view of Embodiment 1 of this utility model.

[0024] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0025] Figure 5 for Figure 4 A structural diagram from another perspective.

[0026] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention.

[0027] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0028] 100, Frame; 110, First guide rail; 120, Second guide rail; 130, Support plate; 200, Seat body; 210, Backrest frame; 220, Seat frame; 221, Connecting shaft; 300, Linkage structure; 310, First link; 311, First limiting structure; 320, Second link; 321, Second limiting structure; 400, Lead screw motor; 410, First motor mount; 420, First lead screw; 430, First bushing; 431, Fixing frame; 432, Sleeve; 433, Mounting slot; 500, Angle adjuster assembly; 510, Second motor mount; 520, Rotating gear; 530, Rotating shaft; 600, Third link; 700, Second drive assembly; 710, Third motor mount; 720, Second lead screw; 730, Second bushing. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] like Figures 1 to 6 As shown, in this embodiment, a multi-posture adjustable seat includes:

[0035] Rack 100.

[0036] The seat body 200 includes a front end and a rear end that are respectively hinged to the frame 100. The front end is hinged to the frame 100 via a linkage structure 300, which includes a first link 310 and a second link 320 that are hinged to each other and form a hinge point.

[0037] The first drive assembly is mounted on the second link 320 and hinged or hinged to the first link 310. The first drive assembly can drive the first link 310 and the second link 320 to rotate relative to each other, raising or lowering the front end. This design not only significantly reduces the thrust required by the first drive assembly by utilizing the principle of force couple, achieving a labor-saving effect, but also unlocks a larger movement path because the first drive assembly moves with the link, allowing the seat to achieve a tilt angle far exceeding that of traditional labor-saving structures, thus achieving both labor-saving and large-angle adjustment.

[0038] Specifically, such as Figures 1 to 6 As shown, the multi-posture adjustable seat includes a frame 100, a seat body 200, a first drive assembly, and a second drive assembly 700. It can achieve electric adjustment of the seat's "zero-gravity" posture and height, and is especially suitable for smooth switching between a normal sitting posture and a large-angle reclining relaxation mode, meeting users' needs for comfort and functional versatility.

[0039] Furthermore, the frame 100 serves as the supporting foundation for the entire seat, bearing the seat body 200 and the drive assembly. Preferably, the frame 100 includes a first guide rail 110 and a second guide rail 120 symmetrically arranged along the width direction of the seat body 200. These two rails are parallel to each other and fixed to the ground or an external support platform, forming the basic load-bearing frame of the seat. This design not only improves the lateral stability of the seat but also provides a precise geometric reference for the synchronous operation of the left and right adjustment mechanisms, effectively preventing uneven loading or torsional deformation.

[0040] Furthermore, the first guide rail 110 and the second guide rail 120 are respectively provided with two sets of support plates 130 extending along the length of the guide rail. The two sets of support plates 130 are arranged at intervals and are used to hinge the connecting rod structure 300 and the third connecting rod 600 to realize the "zero gravity" attitude adjustment and height adjustment functions.

[0041] Furthermore, the support plate 130 is detachably (e.g., by bolts, quick-release clips, or pin connections) vertically fixed to the guide rail. This design facilitates the independent assembly and disassembly of the support plate 130 during assembly, maintenance, or replacement without disassembling the entire frame 100, significantly improving maintenance efficiency and production flexibility.

[0042] In this embodiment, the seat body 200 includes a backrest frame 210 and a seat frame 220. The seat frame 220 serves as the main structure supporting the human buttocks and thighs, and includes a front end and a rear end. Both the front end and the rear end are hinged to the frame 100, thereby forming a multi-degree-of-freedom adjustment mechanism to achieve flexible changes in seat posture.

[0043] Furthermore, the front end of the seat frame 220 is hinged to the frame 100 via a linkage structure 300. This linkage structure 300 includes a first link 310 and a second link 320 that are hinged to each other and form a hinge point, together constituting part of a four-bar linkage. A first drive assembly is mounted on the second link 320 and connected to the first link 310 or its hinge point. When the first drive assembly is activated, it drives the first link 310 and the second link 320 to rotate relative to each other, thereby raising or lowering the front end of the seat frame 220, realizing the linkage adjustment of the seat frame 220 tilt angle and the backrest angle. This design can support large-angle reclining movement, satisfying a smooth transition from standard sitting posture to zero-gravity posture and other comfort modes, improving the user's physical comfort during long-term sitting or resting.

[0044] Furthermore, the first link 310 is arranged vertically, with one end hinged to the inner front end of the seat body 200 via a pivot pin, forming a stable rotational connection fulcrum; the other end extends towards the frame 100, forming an extension end for connecting the second link 320. This vertical arrangement helps optimize the force transmission path, allowing the first link 310 to primarily bear axial loads during stress, reducing bending stress, and improving structural strength and fatigue life.

[0045] Furthermore, the second link 320 is arranged at an angle, with one end hinged to the extension end of the first link 310 via a pin to form a hinge point. This hinge point serves as a key motion node of the linkage mechanism, constituting not only the relative rotation center between the first link 310 and the second link 320, but also connecting and transmitting the driving force of the first drive assembly. The other end of the second link 320 extends away from the first link 310 and is hinged to the support plate 130 on the frame 100 via a pin, forming a fixed support point for the entire linkage mechanism. This angled arrangement allows the second link 320 to generate a large angular displacement during adjustment, thereby providing sufficient travel and adjustment space for the lifting and lowering of the front end of the seat.

[0046] Furthermore, the first link 310 and the second link 320, through the aforementioned hinge connection, together constitute two movable links in a four-bar linkage, forming a complete kinematic chain with the seat body 200 and the frame 100. When the first drive component is activated, its output force acts on the hinge point between the first link 310 and the second link 320 or directly on the first link 310, driving the two links to rotate relative to each other, thereby raising or lowering the front end of the seat, achieving coordinated adjustment of the seat frame 220 angle and the backrest frame 210 reclining position.

[0047] To limit the angle during the "zero gravity" posture adjustment process and prevent the linkage mechanism from overtraveling or causing structural overload, in this embodiment, a first limiting structure 311 is provided on the first link 310, which protrudes from the periphery of the first link 310 toward the direction closer to the second link 320. Correspondingly, a second limiting structure 321 is provided on the second link 320, which protrudes from the surface of the second link 320 toward the direction closer to the first link 310. When the first link 310 rotates relative to the second link 320 to a preset limit position (i.e., the seat reaches the target zero gravity angle), the first limiting structure 311 and the second limiting structure 321 physically abut against each other, forming a mechanical stop, thereby limiting the first link 310 from continuing to rotate in the original direction of movement and ensuring that the seat posture adjustment is carried out within a safe angle range. This design provides a reliable constraint on the range of motion of the linkage structure 300 through mechanical hard limiting, effectively preventing mechanism collisions, component damage or drive system overload caused by overtravel, and significantly improving the safety and durability of the system.

[0048] Preferably, both the first limiting structure 311 and the second limiting structure 321 are formed by bending a portion of the body material of the first connecting rod 310 and the second connecting rod 320. For example, a specific area of ​​the metal connecting rod is formed by stamping or bending processes to create a protrusion by upward or side flange. This integrated molding process eliminates the need for additional independent limiting components, reduces the number of parts and assembly steps, helps to reduce manufacturing costs, improve production efficiency, and enhance the overall structural integrity and strength consistency.

[0049] Furthermore, the linkage structure 300 has two sets, symmetrically spaced along the width of the seat body 200, and respectively installed on the first guide rail 110 and the second guide rail 120, forming independent but coordinated transmission units on the left and right sides. This symmetrical arrangement not only improves the structural rigidity and load uniformity of the seat during adjustment, but also effectively prevents torsion, uneven loading, or asynchronous movement caused by unilateral force.

[0050] Furthermore, the first drive component is mounted on the second link 320 and connected to the first link 310 or the hinge point between the first link 310 and the second link 320, for driving the linkage structure 300 to move, thereby raising or lowering the front end of the seat. This design abandons the traditional approach of hinged one end of the drive component to the frame 100 or the seat body 200, and innovatively integrates it into the linkage structure 300, forming a "drive-linkage integrated" floating transmission architecture. This floating drive structure can directly apply the force of the first drive component to the first link 310 and the second link 320, which not only significantly reduces the thrust required by the drive unit by utilizing the principle of force couple, achieving a force-saving effect, but also unlocks a larger motion path because the drive unit moves with the linkage, allowing the seat to obtain a tilt angle far exceeding that of traditional force-saving structures, thus achieving both force saving and large angle adjustment.

[0051] Furthermore, the first drive component can be a common electric drive unit such as a lead screw motor 400, an angle adjuster assembly 500, or a gear plate drive assembly (not shown in the figure). It can be flexibly selected according to product positioning, cost control, and performance requirements to improve the versatility and scalability of the solution.

[0052] In this embodiment, the rear end of the seat frame 220 is hinged to the frame 100 via a third link 600, and its lifting motion is achieved under the drive of the second drive assembly 700. Specifically, the output end of the second drive assembly 700 is hinged to the third link 600, and the third link 600 is driven to swing via linear extension or rotation, thereby pushing the rear end of the seat to rise or fall as a whole, realizing the adjustment of the overall height of the seat. This design can adapt to the usage needs of users of different heights and optimize the ergonomic matching of sitting posture.

[0053] Furthermore, the third link 600 is arranged at an angle, with one end hinged to the support plate 130 on the frame 100 via a pin, forming a fixed rotation fulcrum; the other end extends toward the rear end of the seat frame 220 and is rotatably connected to the connecting shaft 221 arranged along the width direction of the seat. Preferably, there are two sets of the third link 600, symmetrically arranged on the left and right sides of the seat, one set is installed on the support plate 130 of the first guide rail 110, and the other set is installed on the support plate 130 of the second guide rail 120, ensuring balanced force and synchronous movement on both sides, effectively preventing the seat from tilting, twisting, deforming, or jamming on one side during lifting and lowering.

[0054] Furthermore, the rear end of the seat frame 220 is provided with a connecting shaft 221 extending along its width direction. This connecting shaft 221 passes through the hinged ends of the third links 600 on both sides or is connected to them through a joint structure to achieve rigid linkage of the third links 600 on both sides. The connecting shaft 221 not only serves as a motion support for the third links 600, but also enhances the overall structural rigidity of the rear end of the seat frame 220 and improves load-bearing stability.

[0055] Furthermore, the second drive assembly 700 can be selected from common electric drive units such as a lead screw motor, an angle adjuster assembly, or a gear plate drive assembly, and can be flexibly configured according to product performance requirements. Preferably, the second drive assembly 700 adopts a lead screw motor, one end of which is hinged to the front end of the seat body 200, and the other end extends obliquely towards the third link 600 and is hinged to the third link 600, so as to drive the front end and rear end of the seat body 200 to rise or fall synchronously.

[0056] Furthermore, the second drive assembly 700 includes a third motor base 710, a second lead screw 720, and a second bushing 730. The third motor base 710 is hinged to the support frame at the front end of the seat frame 220 via a pin. The second lead screw 720 is rotatably disposed within the third motor base 710, with its output end extending obliquely towards the third connecting rod 600. The second bushing 730 is rotatably fitted onto the extended end of the second lead screw 720 and hinged to the third connecting rod 600 via a pin, forming a stable push-pull transmission pair. The first, second, and third motor bases 710 respectively house the drive motor body.

[0057] When the lead screw motor is working, the second lead screw 720 applies a pushing or pulling force to the third connecting rod 600 through the second bushing 730, driving the third connecting rod 600 to swing, thereby raising and lowering the rear end of the seat. Since the second drive assembly 700 is installed at the front end of the seat body 200, its driving force is transmitted to the rear end through the linkage mechanism. Combined with the posture adjustment at the front end controlled by the first drive assembly, the coordinated raising and lowering of the front and rear ends of the seat can be achieved, completing the overall height adjustment and improving the smoothness and posture consistency of the adjustment process.

[0058] Example 1

[0059] like Figures 1 to 3 As shown, when the first drive component uses a lead screw motor 400, its output end is hinged to the first connecting rod 310; when using an angle adjuster component 500 or a gear plate drive component, its output end is connected to the hinge point between the first connecting rod 310 and the second connecting rod 320. This differentiated connection method fully matches the power output characteristics of different types of drive components: the lead screw motor 400 is mainly linear push-pull, suitable for acting on the connecting rod arm to achieve lever drive; the angle adjuster component 500 or the gear plate assembly is mainly rotary output, more suitable for directly acting on the hinge point to apply torque. By optimizing the force transmission path, efficient, stable, and low-loss transmission can be achieved under various drive configurations, improving the overall reliability and response accuracy of the system.

[0060] Furthermore, when the first drive assembly uses a lead screw motor 400, its specific structure includes a first motor base 410, a first lead screw 420, and a first bushing 430. The first motor base 410 is rotatably mounted on the second connecting rod 320 via a pin or rotating part, forming a hinged connection. This allows the lead screw motor 400 to swing synchronously with the second connecting rod 320, avoiding stress concentration caused by rigid fixing. The first lead screw 420 is rotatably mounted on the first motor base 410 and extends horizontally or obliquely towards the first connecting rod 310. The first bushing 430 is rotatably fitted onto the output end of the first lead screw 420 and hinged to the first connecting rod 310 via a pin, forming a stable kinematic pair. This design allows the linear extension and retraction motion of the lead screw motor 400 to be smoothly converted into the rotational motion of the first connecting rod 310. This rotation drives the first connecting rod 310 and the second connecting rod 320 to rotate relative to each other, causing geometric deformation of the linkage mechanism. Ultimately, this causes the front end of the seat body 200 to rise or fall, thus adjusting the angle of the seat frame 220. Simultaneously, the hinged relationship between the first bushing 430 and the first connecting rod 310 allows for adaptive deflection at a certain angle, effectively compensating for geometric deviations during movement, preventing jamming or interference, and further improving the smoothness and durability of the adjustment process.

[0061] Furthermore, the first bushing 430 includes a U-shaped fixed frame 431 and a hollow cylindrical sleeve 432. The fixed frame 431 is hinged to the first connecting rod 310 via a pin, forming a rotatable connection to transmit driving force and allow for a certain degree of freedom of swing. The fixed frame 431 has a U-shaped mounting groove 433 communicating with the outside, facilitating the assembly and positioning of the sleeve 432. The hollow cylindrical sleeve 432 is fixedly installed in the U-shaped mounting groove 433, preferably using welding to achieve a firm connection, ensuring no relative displacement between the sleeve 432 and the fixed frame 431. The inner hole of the sleeve 432 forms a helical fit with the output end of the first lead screw 420, allowing it to reciprocate linearly along the axis of the first lead screw 420, thereby driving the first connecting rod 310 to rotate around its hinge point, realizing the linkage deformation of the linkage mechanism. The combined structure of the fixing frame 431 and the sleeve 432 not only has high structural rigidity and load-bearing capacity, but also facilitates separate manufacturing and modular assembly.

[0062] Example 2

[0063] like Figures 4 to 6As shown, when the first drive assembly uses the angle adjuster assembly 500, its specific structure includes a second motor base 510, a rotating gear 520, and a rotating shaft 530. The second motor base 510 is fixedly mounted on the second connecting rod 320, achieving integrated layout with the connecting rod structure 300, ensuring that the drive assembly moves synchronously with the second connecting rod 320. The rotating gear 520 is rotatably mounted at the common hinge point of the first connecting rod 310 and the second connecting rod 320, and is arranged coaxially with this hinge point. One end of the rotating shaft 530 is connected to the output end of the second motor base 510 and is driven to rotate by a built-in motor; the other end passes axially through the rotating gear 520, forming a transmission connection. When the second motor base 510 outputs power, the rotating shaft 530 drives the rotating gear 520 to rotate around the hinge point axis, thereby driving the first connecting rod 310 to swing relative to the second connecting rod 320, realizing the deformation of the connecting mechanism and the lifting and lowering adjustment of the front end of the seat.

[0064] Furthermore, two sets of rotating gears 520 and second motor mounts 510 are respectively provided, symmetrically arranged on the connecting rod structures 300 on the left and right sides along the width direction of the seat body 200. The rotating shaft 530 is a rigid, integral shaft, with its two ends passing through the output ends of the two sets of second motor mounts 510, and further extending to the corresponding rotating gears 520, coaxially connected or meshing with the rotating gears 520 to achieve synchronous power transmission. Specifically, when the drive motor in the second motor mount 510 starts, its output torque drives the rotating gears 520 on the left and right sides to rotate synchronously through the rotating shaft 530. Compared to the lead screw motor 400, the angle adjuster assembly 500 has significant advantages in structural stability and self-locking performance.

Claims

1. A multi-posture adjustable seat, characterized in that, include: frame; The seat body includes a front end and a rear end that are respectively hinged to the frame, and the front end is hinged to the frame through a linkage structure, the linkage structure including a first link and a second link that are hinged to each other and form a hinge point; A first drive assembly is mounted on the second link and is hinged to or connected to the hinge point of the first link. The first drive assembly can drive the first link and the second link to rotate relative to each other and raise or lower the front end.

2. The multi-posture adjustable seat according to claim 1, characterized in that, The first driving component is a lead screw motor, an angle adjuster assembly, or a gear plate drive assembly; when the first driving component is a lead screw motor, the output end of the first driving component is hinged to the first connecting rod; when the first driving component is an angle adjuster assembly and a gear plate drive assembly, the output end of the first driving component is connected to the hinge point.

3. A multi-posture adjustable seat according to claim 2, characterized in that, One end of the first link is hinged to the seat body, and the other end extends toward the frame. One end of the second link is hinged to the extension end of the first link to form the hinge point, and the other end extends away from the first link and is hinged to the frame.

4. A multi-posture adjustable seat according to claim 3, characterized in that, When the first drive assembly is the lead screw motor, it includes a first motor base, a first lead screw, and a first bushing. The first motor base is mounted on the second connecting rod and is hinged to the second connecting rod. The first lead screw is disposed on the first motor base and extends toward the first connecting rod. The first bushing is rotatably sleeved on the extended end of the first lead screw and is hinged to the first connecting rod.

5. A multi-posture adjustable seat according to claim 4, characterized in that, The first bushing includes a fixing frame and a sleeve. The fixing frame is hinged to the first connecting rod and has a mounting groove communicating with the outside. The sleeve is fixed in the mounting groove.

6. A multi-posture adjustable seat according to claim 3, characterized in that, When the first drive component is the angle adjuster component, it includes a second motor base, a rotating gear and a rotating shaft. The second motor base is mounted on the second connecting rod, the rotating gear is rotatably mounted at the hinge point, one end of the rotating shaft is connected to the output end of the second motor base, and the other end passes through the rotating gear.

7. A multi-posture adjustable seat according to claim 6, characterized in that, The linkage structure has two sets, which are arranged at intervals along the width direction of the seat body. The rotating gear and the second motor base each have two sets, and the two ends of the rotating shaft are respectively passed through the two sets of rotating gears.

8. A multi-posture adjustable seat according to claim 1, characterized in that, The first connecting rod is provided with a first limiting structure, which protrudes from the periphery of the first connecting rod toward the direction closer to the second connecting rod. The second connecting rod is provided with a second limiting structure, which protrudes from the surface of the second connecting rod toward the direction closer to the first connecting rod. When the first connecting rod rotates relative to the second connecting rod to a preset position, the first limiting structure abuts against the second limiting structure and can restrict the first connecting rod from continuing to rotate in the original direction.

9. A multi-posture adjustable seat according to claim 1, characterized in that, The rear end of the seat body is hinged to the frame via a third link, and the front end of the seat body is hinged to a second drive assembly. The second drive assembly extends toward the third link and is hinged to the third link, and the second drive assembly can drive the front end and rear end of the seat body to rise or fall synchronously.

10. A multi-posture adjustable seat according to claim 9, characterized in that, The second drive assembly includes a third motor mount, a second lead screw, and a second bushing. The third motor mount is hinged to the front end of the seat body. The second lead screw is disposed on the third motor mount and extends toward the third connecting rod. The second bushing is rotatably sleeved on the extended end of the second lead screw and hinged to the third connecting rod. The rear end of the seat body is provided with a connecting shaft extending along its own width direction. The third connecting rod is rotatably connected to the connecting shaft.

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