Foot rest mechanism and seat

Abstract

The utility model relates to the technical field of seat accessories, in particular to a footrest mechanism and a seat, which comprise a sliding rod component arranged at the lower end of the seat in a sliding manner and a first footrest plate arranged at the front end part of the sliding rod component. The bottom of the first footrest is supported on the front end portion of the sliding rod assembly. A second footrest plate is rotationally arranged on the front end part of the sliding rod assembly or the first footrest plate; and the second footrest plate can be overturned around a hinge point of the second footrest plate to be basically flush with the first footrest plate and is locked. The scheme has the advantages that the supporting area is expanded, and the use stability and the adjustment flexibility are improved.

Description

Technical Field

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

[0002] Traditional chair footrest mechanisms typically employ a single footrest structure, offering limited support area and failing to accommodate the diverse foot placement needs of different users, especially those who require prolonged sitting, lacking sufficient support and comfort. Furthermore, while some existing adjustable footrests can achieve angle changes through movable connections, in practice, their loose structure or lack of effective locking mechanisms often leads to footrest wobbling or instability in the unfolded state, impacting the user experience. For example, some footrests achieve folding functionality through simple hinge structures, but lack rigid support when unfolded, making them prone to displacement due to user leg movements. Other footrest mechanisms using sliding rails can expand the support range, but multi-level adjustments are cumbersome and struggle to create a stable support plane when unfolded. Moreover, existing technologies lack optimized designs for coordinated adjustment of two footrests, failing to simultaneously meet the demands for a large support area and adaptive angle adjustment.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0004] In order to solve the above problems, the purpose of this utility model is to provide a footrest mechanism and seat, which has the advantages of expanding the support area, improving the stability of use and the flexibility of adjustment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a footrest mechanism, the technical solution of which is as follows: it includes a slide rod assembly slidably disposed at the lower end of the chair seat, and a first footrest plate disposed on the front end of the slide rod assembly. The bottom of the first footrest plate is supported on the front end of the slide rod assembly. A second footrest plate is rotatably disposed on the front end of the slide rod assembly or on the first footrest plate, and the second footrest plate can be flipped around its hinge point to a state substantially flat with the first footrest plate and locked.

[0007] The sliding rod assembly is slidably mounted on the lower end of the seat, enabling position adjustment of the footrest mechanism. The first footrest is fixedly supported at the front end of the sliding rod assembly, providing a basic support surface. The second footrest is hinged and can be flipped onto either the first footrest or the sliding rod assembly, with a locking mechanism securing its unfolded position. These features work synergistically: the sliding rod assembly enables overall position adjustment of the footrest mechanism; the first footrest provides primary support; the second footrest expands its support area by flipping; and the locking mechanism ensures stability after unfolding, thus forming an adjustable footrest mechanism with expanded support capabilities.

[0008] This solution, through the sliding adjustment of the slide rod assembly and the combined design of two-stage footrests, not only expands the support area but also ensures the stability of the unfolded state through the locking mechanism, thus solving the technical problems of limited support area and inability to stably expand traditional footrest mechanisms.

[0009] Furthermore, this application proposes that the first footrest is movably mounted on the front end of the slide rod assembly. When the second footrest is flipped to be substantially level with the first footrest, the second footrest can lock itself to the first footrest, keeping them relatively fixed. The application includes a movable connection structure between the first footrest and the front end of the slide rod assembly, and a locking mechanism between the second footrest and the first footrest. The movable connection structure allows the first footrest to be position-adjustable, while the locking mechanism, through mechanical cooperation, ensures a rigid connection between the two footrests after unfolding, eliminating relative displacement between them. These two features work together to ensure both the flexibility of footrest angle adjustment, making it suitable for the user's leg support angle, and the overall structural stability after unfolding. This solution, through the combined design of the movable connection and the locking mechanism, allows the two-stage footrests to form a stable composite support plane after unfolding, avoiding structural swaying caused by user movements, while maintaining adaptive adjustment capability to leg posture.

[0010] Furthermore, this application proposes that the first footrest is rotatably mounted on the front end of the slide rod assembly, with a torsion spring disposed between them. The torsion spring generates a reset torque that keeps the first footrest supported on the front end of the slide rod assembly. This solution achieves a rotatable connection of the first footrest through a pivot mechanism, providing a structural basis for angle adjustment. As an elastic element, the torsion spring generates a reset torque that dynamically balances with the weight of the footrest, allowing the user to freely adjust the angle of the footrest while automatically resetting it to the standard support position after the external force is removed. This solves the problem of unstable support caused by the lack of a reset function in traditional footrests.

[0011] Furthermore, this application proposes that the sliding rod assembly includes several parallel sliding rods and a flip shaft assembly. The sliding rods are slidably disposed at the lower end of the chair seat, and the flip shaft assembly is disposed at the front end of the sliding rods. The first footrest and the second footrest are mounted on the flip shaft assembly via a coaxially arranged rotating shaft. The first rotating seat sidewall of the first footrest is provided with a rotating groove, and the second rotating seat of the second footrest is provided with a rotating block that can slide within the rotating groove. When the second footrest is in the unfolded state and the fully retracted state, the rotating block and the rotating groove form a locking engagement. The sliding rod assembly achieves forward and backward sliding adjustment through parallel sliding rods, providing basic support for the footrest; the flip shaft assembly integrates a rotating shaft installation function, enabling the two-stage footrest to rotate coaxially, reducing structural space occupation; the cooperation design of the rotating groove and the rotating block achieves rigid locking through mechanical interlocking in the unfolded state, and maintains stable locking through the contact surface positioning structure in the retracted state; this solution solves the stability of the two-stage footrest when unfolded and retracted simultaneously through the linkage design of the coaxial rotating shaft and the rotating groove block. This technical solution achieves a dual locking function through a mechanical interlocking structure: in the unfolded state, the engagement of the rotating block and the rotating groove forms a torsional rigid connection, ensuring that the two-stage footrests maintain a flat support surface; in the retracted state, the second footrest is tightly fitted under the first footrest.

[0012] Furthermore, this application proposes that a bayonet is provided on the front side of the rotating groove, and the shaft hole of the second rotating seat is a gourd-shaped structure, including a first shaft hole portion and a second shaft hole portion that are interconnected. When the rotating shaft is located in the first shaft hole portion, the rotating block can slide freely in the rotating groove. When an external force is applied to the second foot plate to move the rotating shaft to the second shaft hole portion, the rotating block enters the bayonet to form a position lock, at which time the second foot plate remains in an unfolded state that is basically flat with the first foot plate. The bayonet on the front side of the rotating groove and the gourd-shaped shaft hole structure form a mechanical locking mechanism, and the two working states are switched by the displacement of the rotating shaft between the first shaft hole portion and the second shaft hole portion. In the free sliding state, the rotating shaft is located in the first shaft hole portion, and the rotating block can move in the rotating groove to adapt to the adjustment requirements; in the locked state, an external force pushes the rotating shaft into the second shaft hole portion, causing the rotating block to embed into the bayonet to form a rigid constraint. This design, through the variable diameter structure of the gourd-shaped shaft hole and the limiting effect of the bayonet, realizes the self-locking function of the second foot plate after unfolding, effectively preventing accidental displacement caused by external force. This technical solution, through innovative mechanical structure design, achieves position locking by utilizing the cooperation of a rotating block and a bayonet without adding extra locking components. This ensures stability in the deployed state while simplifying the operation process. The gourd-shaped shaft hole structure achieves state switching by changing the position of the rotating shaft, and its variable diameter design provides clear positioning feedback, ensuring accurate execution of the locking action.

[0013] Furthermore, this application also proposes that the contact surface between the rotating block and the rotating groove is provided with a positioning groove and a positioning protrusion that cooperate with each other. When the second foot plate is in a fully retracted state, the positioning protrusion is engaged with the positioning groove to form a lock, so that the second foot plate remains in a retracted posture that fits against the lower surface of the first foot plate.

[0014] Furthermore, this application also proposes that the slide rod assembly includes two parallel slide rods, and the flip shaft assembly includes bushings respectively fitted onto the front ends of the two slide rods, and a rotating shaft connecting the two bushings.

[0015] Furthermore, this application also proposes that it includes a sliding seat fixed to the lower end of the chair seat, the sliding rod passing through the sliding seat and maintaining the freedom of forward and backward sliding, and the rear end of the sliding rod is provided with an anti-detachment block to prevent the sliding rod from falling out.

[0016] Furthermore, this application also proposes a seat that includes the footrest mechanism described above.

[0017] As can be seen from the above, the footrest mechanism and seat provided in this application, by setting a sliding and adjustable slide rod assembly and a two-stage footrest structure, wherein the first footrest is kept stably supported by a torsion spring, and the second footrest can form a flat extended support surface through a hinge and locking design, which has the advantages of expanding the support area, improving the stability of use and the flexibility of adjustment. Attached Figure Description

[0018] Figure 1 This is a top-view perspective perspective view of the unfolded state of a footrest mechanism provided in this application.

[0019] Figure 2 This is a three-dimensional schematic diagram from the bottom view of the unfolded state of a footrest mechanism provided in this application.

[0020] Figure 3 This is a top-view perspective three-dimensional diagram of a footrest mechanism in its stowed state, as provided in this application.

[0021] Figure 4 This is a cross-sectional view of a foot support mechanism.

[0022] Figure 5 This is a three-dimensional schematic diagram of the first footrest.

[0023] Figure 6 for Figure 5 Enlarged view of part A.

[0024] Figure 7 This is a three-dimensional schematic diagram of the second footrest.

[0025] Figure 8 for Figure 7 Enlarged view of part B. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] Example 1:

[0032] like Figure 1-8 As shown, this embodiment relates to a footrest mechanism, including a slide rod 1 slidably disposed at the lower end of the chair seat, and a first footrest 5 disposed on the front end of the slide rod 1. The bottom of the first footrest 5 is supported on the front end of the slide rod 1. A second footrest 10 is rotatably disposed on the front end of the slide rod 1 or on the first footrest 5. The second footrest 10 can be flipped around its hinge point to a state substantially parallel to the first footrest 5 and locked. This technical solution achieves the adjustment of the overall position of the footrest mechanism through the sliding adjustment of the slide rod 1. The first footrest 5 provides a basic support surface, and the second footrest 10 expands the support area through a hinge structure. When the second footrest 10 is unfolded to be parallel to the first footrest 5, a stable support state is maintained by a locking mechanism. Compared with the prior art, this design not only solves the problem of insufficient support area in traditional footrest mechanisms, but also avoids instability of the expanded support surface through a mechanical locking structure.

[0033] Furthermore, the first footrest 5 is movably mounted on the front end of the slide rod 1. When the second footrest 10 is flipped to be substantially level with the first footrest 5, the second footrest 10 can lock itself to the first footrest 5, keeping them relatively fixed. This technical solution solves the problem of support stability in the unfolded state of the two-stage footrests through the synergistic effect of the movable connection structure and the locking mechanism. The movable connection structure enables the first footrest 5 to have self-adaptive position capabilities, allowing it to adjust its support angle according to the user's leg posture. The locking mechanism eliminates the relative displacement between the two-stage footrests after unfolding, forming a composite support plane. Compared with existing technologies, this solution retains the flexibility of angle adjustment while effectively preventing structural swaying during use through mechanical interlocking, significantly improving the practicality and comfort of the footrest mechanism. Specifically, traditional hinged structures are prone to displacement due to the lack of effective locking, while this solution, through the combination of movable connection and locking design, ensures stability in the unfolded state while maintaining the degree of adjustment freedom.

[0034] Furthermore, this application proposes that the first footrest 5 is rotatably mounted on the front end of the slide rod 1, with a torsion spring 19 disposed between them. The torsion spring 19 generates a reset torque that keeps the first footrest 5 supported on the front end of the slide rod 1. In this technical solution, the first footrest 5 is rotatably connected to the slide rod 1, and the torsion spring 19 acts as an elastic reset element. When the footrest is rotated by an external force, it stores elastic potential energy, and when the external force is removed, it releases the potential energy to drive the footrest to automatically reset. Specifically, the reset torque of the torsion spring 19 forms a torque balance with the weight of the footrest, ensuring that the footrest can flexibly adjust its angle according to the user's leg posture, and that the footrest can accurately return to its initial support position after the external force disappears. Compared with the prior art, this design solves the problem of unstable support caused by the lack of automatic reset function in traditional footrests, avoids the trouble of repeated manual adjustment by the user, and ensures the reliability and immediacy of the support state through the mechanical automatic reset structure, while also preventing the first footrest 5 from shaking.

[0035] like Figure 1-8 As shown, the sliding rod 1 has a flip shaft assembly 3 at its front end. The sliding rod 1 is slidably mounted on the lower end of the chair seat, and the flip shaft assembly 3 is located at the front end of the sliding rod 1. The first footrest 5 and the second footrest 10 are mounted on the flip shaft assembly 3 via a coaxially arranged rotating shaft 18. The first rotating seat 6 of the first footrest 5 has a rotating groove 7 on its side wall, and the second rotating seat 12 of the second footrest 10 has a rotating block 13 that can slide into the rotating groove 7. When the second footrest 10 is in the unfolded state and the fully retracted state, the rotating block 13 and the rotating groove 7 form a locking engagement. This technical solution achieves stable linkage between the two levels of footrests through the coordinated design of the coaxial rotating shaft 18 and the mechanical interlocking structure. The sliding rod 1 provides a linear adjustment basis, and the flip shaft assembly 3 integrates the movement of the sliding rod and the rotation of the footrests onto the same axis, reducing the structural space occupation. The engagement between the rotating groove 7 and the rotating block 13 forms a torsional rigid connection through the bayonet 9 when unfolded, ensuring that the two levels of footrests maintain a flat support surface. When stored, the positioning protrusion 8 engages with the positioning groove 14, ensuring that the second foot plate 10 fits snugly against the bottom of the first foot plate 5. Compared to traditional single-stage foot plates or simple hinged structures, this design maintains structural compactness while achieving a double locking function through mechanical interlocking, effectively solving the problems of easy shaking in the unfolded state and instability in the stored state.

[0036] like Figure 6 and 8As shown, a bayonet 9 is provided on the front side of the rotating groove 7, and the shaft hole 15 of the second rotating seat 12 has a gourd-shaped structure, including a first shaft hole portion 16 and a second shaft hole portion 17 that are interconnected. When the rotating shaft 18 is located in the first shaft hole portion 16, the rotating block 13 can slide freely in the rotating groove 7. When an external force is applied to the second foot plate 10 to move the rotating shaft 18 to the second shaft hole portion 17, the rotating block 13 enters the bayonet 9 to form a position lock. At this time, the second foot plate 10 is kept in an unfolded state that is basically flat with the first foot plate 5.

[0037] Specifically, the bayonet 9 can be designed as a rectangular groove, a V-groove, or an arc-shaped recess, and its depth must ensure that the rotating block 13 can resist axial tension after being embedded. The transition area between the first shaft hole portion 16 and the second shaft hole portion 17 of the gourd-shaped shaft hole 15 adopts a bevel or arc transition to facilitate axial displacement of the rotating shaft 18 under force. As a preferred embodiment, a rubber pad or textured surface can be added to the contact surface between the rotating block 13 and the bayonet 9 to enhance the friction locking effect.

[0038] To address this, the technical solution utilizes the variable diameter characteristic of the gourd-shaped shaft hole 15 and the spatial fit with the bayonet 9 to construct a bistable locking mechanism based on mechanical deformation. When the rotating shaft 18 is in the first shaft hole portion 16, the clearance fit between the rotating block 13 and the rotating groove 7 allows the second foot plate 10 to freely adjust its angle. After applying an axial thrust to make the rotating shaft 18 slide into the second shaft hole portion 17, the rotating block 13 is forced into the bayonet 9 by the radial constraint force generated by the variable diameter of the shaft hole 15, forming a three-point positioning. This design utilizes the forward and backward displacement of the second foot plate 10 relative to the rotating shaft 18 to synchronously control the radial movement of the rotating block 13, thereby controlling the rotating block 13 to enter or exit the bayonet 9, reducing the number of parts compared to traditional independent locking mechanisms. The transition slope of the gourd-shaped shaft hole 15 provides tactile feedback, allowing the user to perceive the achievement of the locking state.

[0039] like Figure 6 and 8As shown, the contact surfaces of the rotating block 13 and the rotating groove 7 are provided with mutually cooperating positioning grooves 14 and positioning protrusions 8. When the second foot plate 10 is in the fully retracted state, the positioning protrusions 8 engage with the positioning grooves 14 to form a lock, keeping the second foot plate 10 in a retracted posture that fits against the lower surface of the first foot plate 5. Specifically, the positioning groove 14 can be designed as a hemispherical recess or a rectangular slot, and the positioning protrusions 8 correspond to spherical protrusions or wedge-shaped blocks. The positioning protrusions 8 are preferably made of elastic material, achieving engagement and disengagement through deformation. Furthermore, the height of the positioning protrusions 8 is designed to be slightly greater than the depth of the positioning groove 14, thereby creating an interference fit to ensure that the locked state does not experience displacement due to vibration. This technical solution achieves forced locking in the retracted state through a mechanical interlocking structure: when the second foot plate 10 rotates to the fully retracted position, the geometric interference between the positioning protrusions 8 and the positioning grooves 14 forms a physical barrier, while the friction between the mating surfaces resists external disturbances. Compared to traditional folding structures that rely on a single frictional force, this design features a clearly defined locking position and enhanced anti-interference capabilities, effectively preventing accidental unfolding due to accidental bumps or vibrations. Furthermore, this locking mechanism only activates when the device is folded; when unfolded, the rotating block 13 can still slide freely within the rotating groove 7, ensuring smooth function switching. Thus, it solves the problem of folding stability while retaining the convenience of unfolding operation.

[0040] like Figure 1-3 As shown, the slide rod 1 includes two parallel slide rods, and the flipping shaft assembly 3 includes bushings 4 respectively fitted onto the front ends of the two slide rods 1, and a rotating shaft 18 connecting the two bushings 4. Specifically, the two parallel slide rods can be made of metal tubing with circular or rectangular cross-sections. The bushings 4 are preferably copper-based bushings with flanges, with their inner diameter forming a clearance fit with the outer diameter of the slide rod 1. The flange end face is fixedly connected to the end of the rotating shaft 18 by screws. In addition, an annular limiting groove can be machined at the front end of the slide rod 1, and an elastic retaining ring is provided in the bushing 4 to cooperate with it, preventing the bushing 4 from moving axially along the slide rod 1. This technical solution, through the symmetrical layout of the double slide rods and double bushings 4, ensures that the load when the foot plate flips is evenly distributed on both sides of the support points, effectively avoiding deformation or jamming problems caused by unilateral force. Among them, the parallel slide rods 1 provide a stable linear guiding foundation, and the sleeve-type bushing 4 design ensures a reliable connection between the slide rod 1 and the rotating shaft 18, while allowing the slide rod 1 to be slightly adjusted within the bushing 4 to accommodate installation errors. The rotating shaft 18 connecting the two bushings 4 forms a unified center of rotation, ensuring that the two footrests rotate around the same axis and eliminating motion interference caused by axis deviation. Compared with the single slide bar structure, this design improves the traditional single-point support to double-point support, giving the flip shaft assembly 3 higher bending stiffness when bearing the pressure of the user's feet, while maintaining smooth rotation through the sliding fit characteristics of the bushings 4.

[0041] Furthermore, this application also proposes a sliding seat 20 fixed to the lower end of the chair seat. A sliding rod 1 passes through the sliding seat 20 and maintains freedom of forward and backward sliding. The rear end of the sliding rod 1 is provided with an anti-detachment block 2 to prevent the sliding rod from dislodging. The sliding seat 20 can be made of stamped metal or injection molded from engineering plastic. Its inner hole is equipped with a linear bearing or self-lubricating bushing to reduce the frictional resistance of the sliding rod 1. The anti-detachment block 2 can be fixed to the rear end of the sliding rod 1 by welding, riveting, or threaded connection. Its outer diameter is larger than the inner hole of the sliding seat 20 to ensure effective limiting. As a preferred embodiment, the sliding seat 20 is provided with a mounting groove and is fastened to a pre-positioned hole in the lower beam of the chair seat by bolts. A rubber shock-absorbing pad can be added to the mounting surface to reduce sliding noise. The anti-detachment block 2 can be made of nylon to reduce weight, and its end face can be machined into a spherical structure to reduce the contact stress with the end face of the sliding seat 20. This technical solution, through the precise cooperation between the sliding seat 20 and the sliding rod 1, completely eliminates the risk of the sliding rod detaching while ensuring the forward and backward sliding adjustment function, thanks to the mechanical limiting effect of the anti-detachment block 2. Specifically, the sliding seat 20 provides linear guiding constraint for the sliding rod 1, ensuring that the sliding rod 1 moves only axially. The anti-detachment block 2, on the other hand, prevents the sliding rod 1 from moving beyond its travel range through physical interference. The combined effect of the two ensures that the footrest mechanism maintains a reliable connection during frequent adjustments. Compared to traditional slide rail structures without anti-detachment design, this solution significantly improves the service life and safety of the mechanism, making it particularly suitable for office chairs or lounge chairs where the footrest position needs to be repeatedly adjusted.

[0042] In summary, when the footrest mechanism needs to be unfolded for use, simply flip the second footrest 10 so that it is basically level with the first footrest 5; then pull the second footrest 10 forward, which will pull the second footrest 10 and the first footrest 5 forward through the slide bar 1 until they are pulled to their limit; finally, continue to pull the second footrest 10 so that the rotating block 13 on the second footrest 10 enters the latch 9 to form a position lock, and the second footrest 10 is locked in the unfolded state where it is basically level with the first footrest 5.

[0043] Example 2:

[0044] This embodiment proposes a seat that includes the footrest mechanism described in Embodiment 1. By integrating this footrest mechanism, the seat solves the technical problems of insufficient support area, inconvenient adjustment, and poor stability after unfolding in traditional seat footrest mechanisms. The forward and backward sliding adjustment of the slide rod assembly allows for flexible adjustment of the footrest position according to user needs, and the two-stage footrest structure expands by flipping to form a larger continuous support plane. Specifically, the first footrest provides the basic support surface, and the second footrest, after unfolding, forms a flat extended support surface with the first footrest, with a locking mechanism ensuring stability in the unfolded state. Compared with existing technologies, this solution significantly increases the foot support area, while the torsion spring structure and locking design balance adjustment flexibility and stability, effectively improving seat comfort.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A footrest mechanism, comprising a slide rod (1) slidably disposed at the lower end of a chair seat, and a first footrest plate (5) disposed at the front end of the slide rod (1); the bottom of the first footrest plate (5) is supported on the front end of the slide rod (1); characterized in that: A second foot plate (10) is rotatably provided on the front end of the slide bar (1) or on the first foot plate (5). The second foot plate (10) can be flipped around its hinge point to be substantially flat with the first foot plate (5) and locked.

2. The foot support mechanism according to claim 1, characterized in that: The first footrest (5) is movably mounted on the front end of the slide bar (1). When the second footrest (10) is flipped to be substantially level with the first footrest (5), the second footrest (10) can lock itself to the first footrest (5) so that the two remain relatively fixed.

3. The foot rest mechanism according to claim 1, characterized in that: The first footrest (5) is rotatably mounted on the front end of the slide bar (1) and a torsion spring (19) is provided between them. The torsion spring (19) generates a restoring torque that keeps the first footrest (5) supported on the front end of the slide bar (1).

4. The foot support mechanism according to claim 1, characterized in that: The sliding rod (1) has a flip shaft assembly (3) at its front end. The first foot rest (5) and the second foot rest (10) are mounted on the flip shaft assembly (3) via a coaxially arranged rotating shaft (18). The first rotating seat (6) of the first foot rest (5) has a rotating groove (7) on its side wall. The second rotating seat (12) of the second foot rest (10) has a rotating block (13) that can slide into the rotating groove (7). When the second foot rest (10) is in the unfolded state and the fully retracted state, the rotating block (13) and the rotating groove (7) form a locking engagement.

5. The foot rest mechanism according to claim 4, characterized in that: The front side of the rotating groove (7) is provided with a bayonet (9), and the shaft hole (15) of the second rotating seat (12) is a gourd-shaped structure, including a first shaft hole (16) and a second shaft hole (17) that are interconnected. When the rotating shaft (18) is located in the first shaft hole (16), the rotating block (13) can slide freely in the rotating groove (7). When an external force is applied to the second foot plate (10) to move the rotating shaft (18) to the second shaft hole (17), the rotating block (13) enters the bayonet (9) to form a position lock. At this time, the second foot plate (10) is kept in an unfolded state that is basically flat with the first foot plate (5).

6. The foot rest mechanism according to claim 4, characterized in that: The rotating block (13) is provided with a positioning groove (14), and the rotating groove (7) is provided with a positioning protrusion (8) that cooperates with the positioning groove (14); when the second foot plate (10) is in a fully retracted state, the positioning protrusion (8) is engaged in the positioning groove (14) to form a lock, so that the second foot plate (10) remains in a retracted posture that is close to the lower surface of the first foot plate (5).

7. The foot rest mechanism according to claim 4, characterized in that: The flip shaft assembly (3) includes bushings (4) respectively fitted onto the front ends of the two slide rods (1), and a rotating shaft (18) connecting the two bushings (4).

8. The foot rest mechanism according to claim 1, characterized in that: It also includes a sliding seat (20) fixed to the lower end of the chair seat. The sliding rod (1) passes through the sliding seat (20) and maintains the freedom of forward and backward sliding. The rear end of the sliding rod (1) is provided with an anti-detachment block (2) to prevent the sliding rod from falling out.

9. A type of seat, characterized in that: It includes the footrest mechanism as described in any one of claims 1-8.

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