A leg rest mechanism

Abstract

The utility model relates to the technical field of seat fittings, disclose a leg rest mechanism, including leg rest body, footboard, its movably be located on leg rest body, drive assembly, it includes drive part, first connecting rod and second connecting rod, drive part install on leg rest body to, and output linear motion, first connecting rod one end with drive part's output end is connected, and other end with footboard's first hinged joint hinged, second connecting rod's one end with leg rest body hinged, and other end with footboard's second hinged joint hinged, second hinged joint is located between first hinged joint with footboard's free end, make footboard in the process of unfolding, its front end along leg rest body towards unfolding direction slip, its rear end synchronous along vertical unfolding direction lift. The utility model has the beneficial effect that footboard in the process of unfolding does not encroach on passenger foot space, convenient operation and stable support.

Description

Technical Field

[0001] This utility model relates to the field of seat accessories technology, and in particular to a leg support mechanism. Background Technology

[0002] With the development of the automotive industry and the increasing demands of users for ride comfort, the functional design of car seats has become increasingly sophisticated. Leg support components, as an important comfort feature, can effectively extend the seat cushion length and provide additional support for passengers' legs, thus finding widespread use in mid-to-high-end models.

[0003] In existing leg support assemblies, a foldable footrest is typically located at the end of the leg support plate. This footrest is connected to the leg support plate via a hinge axis. When not in use, the footrest is stored in a position roughly parallel to the leg support plate. When needed, the user operates the footrest via a mechanism, causing it to rotate around the hinge axis and fold to a position roughly perpendicular to the leg support plate or at a certain angle, thus providing support for the passenger's feet. However, this fixed-axis rotation-based opening method has inherent drawbacks. During unfolding, the footrest's outer edge forms a fan-shaped surface centered on the hinge axis. This movement encroaches on the user's foot placement space, forcing the user to proactively raise their legs or move to the sides to avoid contact with the moving footrest. Otherwise, the footrest is prone to collision, meaning the outer edge of the footrest easily comes into contact with and presses against the passenger's ankle or calf, causing discomfort and severely impacting the riding experience. Overall, this operation not only reduces the ease of use and intuitiveness, but also feels particularly cramped in the limited space inside the car, affecting the overall riding experience and the friendliness of human-computer interaction. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a leg support mechanism that does not encroach on the passenger's foot space during the unfolding of the foot pedal, is easy to operate, and provides stable support.

[0005] The technical solution adopted by this utility model to solve its technical problem is to provide a leg support mechanism, comprising:

[0006] Leg rest body;

[0007] A foot pedal, which is movably mounted on the leg rest body;

[0008] The drive assembly includes a drive member, a first link, and a second link. The drive member is mounted on the leg support body and outputs linear motion. One end of the first link is connected to the output end of the drive member, and the other end is hinged to a first hinge point of the foot pedal. One end of the second link is hinged to the leg support body, and the other end is hinged to a second hinge point of the foot pedal. The second hinge point is located between the first hinge point and the free end of the foot pedal, so that during the unfolding process, the front end of the foot pedal slides along the leg support body in the unfolding direction, and the rear end rises synchronously along the vertical unfolding direction.

[0009] In the aforementioned leg support mechanism, the length of the first link is less than the length of the second link, and the foot pedal includes a front region, a middle region, and a rear region. The first hinge point is located in the front region, and the second hinge point is located in the middle region or the rear region.

[0010] In the aforementioned leg support mechanism, the leg support body has a first placement surface extending along its own length direction, the foot pedal is movably disposed on the first placement surface and has a second placement surface extending along its own length direction, and the foot pedal has a storage state and a use state; when the foot pedal is in the storage state, the second placement surface is parallel to the first placement surface; when the foot pedal is in the use state, the second placement surface and the first placement surface form an angle greater than or equal to 90°.

[0011] In one of the leg support mechanisms described above, the driving component is a linear drive motor, a linear drive cylinder, or a linear drive hydraulic cylinder.

[0012] In one of the above-mentioned leg support mechanisms, the drive assembly includes a sliding block, the drive component includes a rotary motor and a screw mounted on the rotary motor, the sliding block is threadedly connected to the screw, and the first connecting rod is fixedly or detachably connected to the sliding block.

[0013] In one of the above-mentioned leg support mechanisms, a support plate is detachably provided on the side of the leg support body away from the first placement surface. The support plate extends along the movement direction of the foot pedal and has a sliding part that is slidably connected to the sliding block.

[0014] In the aforementioned leg support mechanism, the sliding block is provided with a threaded hole that is threadedly connected to the screw, and two slots symmetrically arranged on both sides of the threaded hole. The sliding part is slidably embedded in the slots, and one end of the first connecting rod is detachably connected to the sliding block by fasteners.

[0015] In the aforementioned leg support mechanism, the second link includes a first connecting part and a second connecting part that are perpendicularly connected to each other, wherein the end of the first connecting part away from the second connecting part is hinged to the second hinge point, and the end of the second connecting part away from the first connecting part is hinged to the third hinge point of the leg support body.

[0016] In the above-mentioned leg support mechanism, one end of the first connecting part connected to the second connecting part extends in a direction perpendicular to the second connecting part and forms a first limiting end, and the leg support body is provided with a first limiting surface on the side away from the driving member; when the foot pedal is in the use state, the first limiting end abuts against the first limiting surface.

[0017] In the above-mentioned leg support mechanism, the end of the second connecting portion away from the first connecting portion extends in a direction perpendicular to the first connecting portion and forms a second limiting end, and the leg support body is also provided with a second limiting surface perpendicular to the first limiting surface; when the foot pedal is in the use state, the second limiting end abuts against the second limiting surface.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. In this utility model, the foot pedal is movably mounted on the leg support body. The drive assembly includes a drive member, a first connecting rod, and a second connecting rod. The drive member is mounted on the leg support body and outputs linear motion. One end of the first connecting rod is connected to the output end of the drive member, and the other end is hinged to the first hinge point of the foot pedal. One end of the second connecting rod is hinged to the leg support body, and the other end is hinged to the second hinge point of the foot pedal. The second hinge point is located between the first hinge point and the free end of the foot pedal, so that during the unfolding process, the front end of the foot pedal slides along the leg support body in the unfolding direction. This design constructs an asymmetrical double-link mechanism that effectively constrains the movement of the foot pedal during deployment, allowing its front end to slide horizontally backward while its rear end rises synchronously upward, forming a unique compound motion, rather than swinging from front to back along a traditional arc path. This ensures that the foot pedal does not encroach on the foot placement space in front of the passenger during deployment, eliminating the need for the user to lift their leg in advance or move to the sides. It completely solves the discomfort such as leg discomfort and collision that may occur when traditional foot pedals are deployed, significantly improving the intuitiveness of operation and the comfort of riding.

[0020] 2. In this utility model, the end of the first connecting part connected to the second connecting part extends in a direction perpendicular to the second connecting part and forms a first limiting end, and the leg support body is provided with a first limiting surface on the side away from the driving member; when the foot pedal is in use, the first limiting end abuts against the first limiting surface. This design provides a reliable mechanical hard limit for the foot pedal in use, which not only realizes precise control of the unfolded position and avoids the possible errors that may exist in positioning by relying solely on the driving member and hinge point, but also effectively disperses and bears the main load from the foot, significantly reducing the force on the hinge point and driving member, thereby improving the stability and service life of the entire mechanism.

[0021] 3. In this utility model, the end of the second connecting part away from the first connecting part extends in a direction perpendicular to the first connecting part and forms a second limiting end. The leg support body also has a second limiting surface perpendicular to the first limiting surface. When the foot pedal is in use, the second limiting end abuts against the second limiting surface. This design, together with the first limiting end, forms a bidirectional limiting structure, completely locking the movement of the second link from two mutually perpendicular directions, forming a stable support system. This not only greatly enhances the overall rigidity and stability of the foot pedal in the unfolded state but also effectively suppresses swaying in all directions, ensuring reliable support even under multi-directional loads, further improving the product's safety and durability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the leg support mechanism of this utility model in use.

[0023] Figure 2 This is a cross-sectional view of the leg support mechanism of this utility model in use.

[0024] Figure 3 for Figure 1 A structural diagram from another perspective.

[0025] Figure 4 This is a schematic diagram of the leg support mechanism of this utility model in its stowed state.

[0026] Figure 5 This is an exploded view of the leg support mechanism of this utility model in its stowed state.

[0027] Figure 6 This is a cross-sectional view of the leg support mechanism of this utility model in its stowed state.

[0028] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0029] 100. Leg support body; 101. Third hinge point; 102. Rectangular cavity; 103. Receiving cavity; 110. First placement surface; 120. First limiting surface; 130. Second limiting surface; 200. Foot pedal; 201. First hinge point; 202. Second hinge point; 210. Second placement surface; 300. Driving component; 310. Rotary motor; 320. Screw; 400. First connecting rod; 500. Second connecting rod; 510. First connecting part; 511. First limiting end; 520. Second connecting part; 521. Second limiting end; 600. Sliding block; 610. Threaded hole; 620. Slot; 700. Support plate; 710. Sliding part. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Figures 1 to 6 As shown, this embodiment provides a leg support mechanism, including:

[0036] Leg rest body 100;

[0037] Foot pedal 200, which is movably mounted on the leg rest body 100;

[0038] The drive assembly includes a drive member 300, a first link 400, and a second link 500. The drive member 300 is mounted on the leg support body 100 and outputs linear motion. One end of the first link 400 is connected to the output end of the drive member 300, and the other end is hinged to the first hinge point 201 of the foot pedal 200. One end of the second link 500 is hinged to the leg support body 100, and the other end is hinged to the second hinge point 202 of the foot pedal 200. The second hinge point 202 is located between the first hinge point 201 and the free end of the foot pedal 200, so that the front end of the foot pedal 200 slides along the leg support body 100 in the unfolding direction during the unfolding process. This design constructs an asymmetrical double-link mechanism that effectively constrains the movement of the foot pedal 200 during deployment, allowing its front end to slide horizontally backward while its rear end rises simultaneously, forming a unique compound motion rather than swinging from front to back along a traditional arc path. This ensures that the foot pedal 200 does not encroach on the foot placement space in front of the passenger during deployment, eliminating the need for the user to lift their leg in advance or move to the sides. This completely solves the discomfort such as leg discomfort and collisions that may occur when traditional foot pedals are deployed, significantly improving the intuitiveness of operation and the comfort of riding.

[0039] like Figures 1 to 6 As shown in the figure, the leg support mechanism provided in this embodiment of the present invention mainly includes a leg support body 100, a foot pedal 200, and a drive assembly. The leg support body 100 serves as the basic support structure of the entire mechanism, used to install and support the foot pedal 200 and the drive assembly, and to provide primary support for the user's legs in the use state. The foot pedal 200 is used for the user's feet to step on in the use state. The drive assembly is used to drive the foot pedal 200 to switch between a stowed state and a use state.

[0040] In this embodiment, the leg support body 100 is generally rectangular, and its upper surface has a first placement surface 110 extending along its own length. The first placement surface 110 serves as a positioning reference surface when the foot pedal 200 is in the stored state, and as a support area for the user's legs when the foot pedal 200 is unfolded into the use state.

[0041] Furthermore, the first placement surface 110 is recessed inward along a direction perpendicular to its surface on the side closest to the user's foot, forming a rectangular cavity 102 for accommodating the foot pedal 200. When the foot pedal 200 is in the retracted state, its upper surface is flush with the upper surface of the leg rest body 100, thereby achieving a flat overall appearance and a compact spatial layout, avoiding any impact on riding comfort or aesthetics due to protrusions or steps.

[0042] Furthermore, the leg support body 100 has a rectangular receiving cavity 103 arranged along its length on the side opposite to the first placement surface 110, for accommodating the drive assembly. This receiving cavity 103 integrates the drive assembly inside the leg support body 100, effectively avoiding exposed parts, which not only improves the product's appearance but also helps prevent accidental impacts to mechanical parts, thereby enhancing the reliability and service life of the mechanism.

[0043] In this embodiment, the foot pedal 200 is generally rectangular and horizontally movably disposed on the first placement surface 110. Its upper surface has a second placement surface 210 extending along its own length direction to provide support for the user's feet. The foot pedal 200 has a retracted state and a used state. When the foot pedal 200 is in the retracted state, the second placement surface 210 is parallel to the first placement surface 110, making the foot pedal 200 flush with the upper surface of the leg support body 100. When the foot pedal 200 is in the used state, the second placement surface 210 and the first placement surface 110 form an angle greater than or equal to 90°, thereby providing effective vertical or inclined support for the user's feet.

[0044] Preferably, the included angle is greater than 90°, so that the foot pedal 200 tilts slightly backward when in use. This design is more ergonomic and further improves the comfort and stability of foot support.

[0045] Furthermore, the foot pedal 200 has a first hinge point 201 and a second hinge point 202 arranged at intervals along its length on the side opposite to the second placement surface 210. These hinge points are used to hinge with the first link 400 and the second link 500 in the drive assembly, respectively, thereby forming a linkage mechanism to achieve a smooth switching between the foot pedal 200's retracted state and its use state. The second hinge point 202 is located between the first hinge point 201 and the free end of the foot pedal 200, ensuring an effective lever and motion constraint relationship during drive. It is worth noting that the free end of the foot pedal 200 is the rear end.

[0046] Furthermore, the foot pedal 200 includes a front region, a middle region, and a rear region. The first hinge point 201 is located in the front region, and the second hinge point 202 is located in either the middle or rear region. This design, through the rational configuration of the relative positions of the two hinge points and combined with the non-equal length structure of the first link 400 and the second link 500 in the drive assembly, effectively controls the movement posture of the foot pedal 200 during deployment. This allows the front end to slide horizontally backward while the rear end rises synchronously, forming a unique composite motion, rather than swinging outward along the arc trajectory of a traditional fixed-axis structure. This significantly reduces the encroachment on the passenger's foot space, eliminating the need for the user to actively avoid the area, thereby improving the convenience, intuitiveness, and overall riding comfort of operation.

[0047] To enable the foot pedal 200 to switch between a stowed state and a usable state, in this embodiment, a drive assembly connected to the foot pedal 200 is installed on the leg rest body 100. This drive assembly includes a drive member 300, a first connecting rod 400, and a second connecting rod 500. The drive member 300 is horizontally installed within the receiving cavity 103 and arranged along the length of the first placement surface 110. One end of the first connecting rod 400 is connected to the output end of the drive member 300, and the other end passes through the first placement surface 110 and is hinged to the first hinge point 201 of the foot pedal 200, for transmitting the linear output motion of the drive member 300 to the foot pedal 200. One end of the second connecting rod 500 is hinged to the leg rest body 100, and the other end passes through the first placement surface 110 and is hinged to the second hinge point 202 of the foot pedal 200, together forming a linkage transmission assembly for driving the movement of the foot pedal 200.

[0048] Furthermore, the length of the first link 400 is less than the length of the second link 500. This non-equal length design, combined with the specific arrangement of the first hinge point 201 and the second hinge point 202 on the foot pedal 200, can effectively control the movement trajectory of the foot pedal 200 during the unfolding process, causing its free end to rise upward.

[0049] Furthermore, the second link 500 is hinged to the third hinge point 101 of the leg support body 100. This third hinge point 101 is fixedly located at the rear end of the leg support body 100. During the retraction or unfolding of the foot pedal 200, the first hinge point 201 and the second hinge point 202 shift with the movement of the foot pedal 200, while the third hinge point 101 remains stationary, serving as a fixed fulcrum for the entire linkage mechanism. This design, by arranging the third hinge point 101 at the rear end of the leg support body 100 and maintaining its fixed position, provides a stable rotational reference for the linkage system, effectively constraining the movement trajectory of the foot pedal 200 and preventing swaying or instability during operation.

[0050] Furthermore, the drive component 300 is a linear drive motor, a linear drive cylinder, or a linear drive hydraulic cylinder. Preferably, a linear drive motor is used. This design not only enables precise control of output displacement and speed, with rapid response and smooth operation, but also eliminates the need for an additional air source or hydraulic system. It features a compact structure, low noise, and is more suitable for automotive seating environments with high requirements for space layout and quiet performance, thus improving overall integration and user experience.

[0051] Specifically, the drive assembly includes a sliding block 600, and the drive component 300 includes a rotary motor 310 and a screw 320 mounted on the rotary motor 310. The sliding block 600 is threadedly connected to the screw 320 and can move linearly along its axial direction when the screw 320 rotates. The first connecting rod 400 is fixedly or detachably connected to the sliding block 600 and is used to transmit the linear motion of the sliding block 600 to the foot pedal 200. During the drive process, the sliding block 600 drives the first connecting rod 400 to push the front part of the foot pedal 200 to slide along the length direction of the first placement surface 110. At the same time, the second connecting rod 500 uses its third hinge point 101, which is hinged to the leg support body 100, as a fulcrum to guide the rear part of the foot pedal 200 to lift upward synchronously, so that the entire foot pedal 200 can be smoothly unfolded from the storage state to the use state.

[0052] Preferably, the first connecting rod 400 and the sliding block 600 are detachably connected by fasteners. This design not only facilitates assembly, debugging, and subsequent maintenance, but also allows for quick separation of the connecting rod and sliding block 600 during transportation or disassembly, effectively reducing the risk of damage and improving product maintainability and production efficiency.

[0053] Furthermore, a support plate 700 is detachably provided on the side of the leg rest body 100 opposite to the first placement surface 110. The support plate 700 is located within the receiving cavity 103 of the leg rest body 100, extends along the movement direction of the foot pedal 200, and has a sliding portion 710 that is slidably connected to the sliding block 600 for guiding the sliding block 600 to move smoothly along a predetermined trajectory. It is worth noting that the support plate 700 not only provides guiding support for the sliding block 600, but also serves as a mounting base for the drive component 300, realizing the compact integration of the drive assembly inside the leg rest body 100.

[0054] Preferably, the two ends of the support plate 700 are detachably connected to the leg support body 100 by fasteners. This design facilitates the overall assembly and subsequent maintenance of the drive assembly, while also improving the modularity. The drive component 300 or the sliding block 600 can be replaced and adjusted without disassembling the main structure of the leg support body 100, further improving the integration and ease of assembly and disassembly of the drive assembly.

[0055] Furthermore, the sliding block 600 is provided with a threaded hole 610 for threaded connection with the screw 320, and two symmetrically arranged slots 620 on both sides of the threaded hole 610. The sliding parts 710 on both sides of the support plate 700 are slidably embedded in the corresponding slots 620, thereby realizing a guided sliding connection between the sliding block 600 and the support plate 700. This design not only effectively limits the lateral displacement and torsion of the sliding block 600 during movement, but also ensures the structural stability of the connection between the two, making the force uniform and the operation smooth during sliding, which helps to improve the overall reliability and service life of the drive assembly.

[0056] Furthermore, the second link 500 includes a first connecting portion 510 and a second connecting portion 520 that are perpendicularly connected to each other. The end of the first connecting portion 510 away from the second connecting portion 520 is hinged to the second hinge point 202 of the foot pedal 200, and the end of the second connecting portion 520 away from the first connecting portion 510 is hinged to the third hinge point 101 of the leg support body 100. This design makes the second link 500 have an overall L-shaped structure, which not only facilitates its arrangement in a limited space, avoiding other components inside the leg support body 100, but also provides a geometric basis for subsequent limit setting, while helping to optimize the force transmission path and improve the overall rigidity and motion stability of the mechanism.

[0057] Furthermore, one end of the first connecting portion 510 connected to the second connecting portion 520 extends in a direction perpendicular to the second connecting portion 520, forming a first limiting end 511, and a first limiting surface 120 is provided on the side of the leg support body 100 away from the drive member 300; when the foot pedal 200 is in use, the first limiting end 511 abuts against the first limiting surface 120. This design provides a reliable mechanical hard limit for the foot pedal 200 in use, not only achieving precise control of the unfolded position and avoiding possible errors that may exist in positioning solely based on the drive member 300 and the hinge point, but also effectively distributing and bearing the main load from the foot, significantly reducing the force on the hinge point and the drive member 300, thereby improving the stability and service life of the entire mechanism.

[0058] Furthermore, the end of the second connecting portion 520 furthest from the first connecting portion 510 extends in a direction perpendicular to the first connecting portion 510, forming a second limiting end 521. The leg support body 100 also has a second limiting surface 130 perpendicular to the first limiting surface 120. When the foot pedal 200 is in use, the second limiting end 521 abuts against the second limiting surface 130. This design, together with the first limiting end 511, forms a bidirectional limiting structure, completely locking the movement of the second link 500 from two mutually perpendicular directions, forming a stable support system. This not only greatly enhances the overall rigidity and stability of the foot pedal 200 in the unfolded state but also effectively suppresses swaying in all directions, ensuring reliable support even under multi-directional loads, further improving the product's safety and durability.

[0059] Preferably, there are two sets of the first connecting rod 400 and the second connecting rod 500. The two sets of the first connecting rod 400 are symmetrically arranged on both sides of the threaded hole 610, and the two sets of the second connecting rod 500 are symmetrically arranged along the width direction of the leg support body 100.

Claims

1. A leg support mechanism, characterized in that, include: Leg rest body; A foot pedal, which is movably mounted on the leg rest body; The drive assembly includes a drive member, a first link, and a second link. The drive member is mounted on the leg support body and outputs linear motion. One end of the first link is connected to the output end of the drive member, and the other end is hinged to a first hinge point of the foot pedal. One end of the second link is hinged to the leg support body, and the other end is hinged to a second hinge point of the foot pedal. The second hinge point is located between the first hinge point and the free end of the foot pedal, so that during the unfolding process, the front end of the foot pedal slides along the leg support body in the unfolding direction, and the rear end rises synchronously along the vertical unfolding direction.

2. The leg support mechanism according to claim 1, characterized in that, The length of the first link is less than the length of the second link, and the foot pedal includes a front region, a middle region, and a rear region. The first hinge point is located in the front region, and the second hinge point is located in the middle region or the rear region.

3. The leg support mechanism according to claim 1, characterized in that, The leg rest body has a first placement surface extending along its own length direction, the foot pedal is movably disposed on the first placement surface, and has a second placement surface extending along its own length direction, and the foot pedal has a storage state and a use state; when the foot pedal is in the storage state, the second placement surface is parallel to the first placement surface; when the foot pedal is in the use state, the second placement surface and the first placement surface form an angle greater than or equal to 90°.

4. A leg support mechanism according to claim 1, characterized in that, The driving component is a linear drive motor, a linear drive cylinder, or a linear drive hydraulic cylinder.

5. A leg support mechanism according to claim 3, characterized in that, The drive assembly includes a sliding block, the drive component includes a rotary motor and a screw mounted on the rotary motor, the sliding block is threadedly connected to the screw, and the first connecting rod is fixedly or detachably connected to the sliding block.

6. A leg support mechanism according to claim 5, characterized in that, The leg rest body is detachably provided with a support plate on the side opposite to the first placement surface. The support plate extends along the movement direction of the foot pedal and has a sliding part that is slidably connected to the sliding block.

7. A leg support mechanism according to claim 6, characterized in that, The sliding block is provided with a threaded hole that is threaded to the screw, and two slots symmetrically arranged on both sides of the threaded hole. The sliding part is slidably embedded in the slots. One end of the first connecting rod is detachably connected to the sliding block by fasteners.

8. A leg support mechanism according to claim 3, characterized in that, The second link includes a first connecting part and a second connecting part that are perpendicularly connected to each other, wherein the end of the first connecting part away from the second connecting part is hinged to the second hinge point, and the end of the second connecting part away from the first connecting part is hinged to the third hinge point of the leg support body.

9. A leg support mechanism according to claim 8, characterized in that, One end of the first connecting portion that is connected to the second connecting portion extends in a direction perpendicular to the second connecting portion and forms a first limiting end, and the leg support body is provided with a first limiting surface on the side away from the driving member; when the foot pedal is in the use state, the first limiting end abuts against the first limiting surface.

10. A leg support mechanism according to claim 9, characterized in that, The end of the second connecting portion away from the first connecting portion extends in a direction perpendicular to the first connecting portion and forms a second limiting end. The leg support body is also provided with a second limiting surface perpendicular to the first limiting surface. When the foot pedal is in the use state, the second limiting end abuts against the second limiting surface.

Images