Leg support and seat comprising same

Abstract

The utility model provides a leg support and a seat. The leg support comprises a deployable assembly, and the deployable assembly comprises a first section and a second section, the second section can relatively move in the unfolding direction or the folding direction of the leg support relative to the first section, and the direction of relative movement of the second section in the unfolding direction or the folding direction of the leg support relative to the first section is defined as a first direction; the driving assembly is connected with the first section and the second section so as to drive the second section to be unfolded or folded relative to the first section, the driving assembly comprises a driving mechanism, and the output end of the driving mechanism is used for driving the second section to move relative to the first section in the first direction; and the scissor fork mechanism is connected with the first section and the second section, and the scissor fork mechanism amplifies the driving stroke of the driving mechanism.

Description

Technical Field

[0001] The present application relates to a leg rest and a seat including the same. Background Art

[0002] For seats, such as vehicle seats, users have an increasingly high demand for seat comfort. For the comfort of the seat, a leg rest can be provided on the seat to support the legs of the occupant and provide a comfortable riding experience, especially for zero-gravity seats and seats in the large bed mode.

[0003] In some solutions, the leg rest is retractably placed at the lower part of the seat and is deployed when needed. However, limited by the limited space at the lower part of the seat, the volume of the mechanism corresponding to the deployment function of the leg rest is limited.

[0004] In some comparative solutions, the deployment and retraction of the leg rest are achieved by a scissor mechanism that amplifies the driving mechanism to achieve a large deployment stroke of the leg rest on the basis of a compact structure. However, the inventor has found that the current structure using the scissor mechanism to amplify the driving stroke has a large shaking situation and the stability needs to be further improved.

[0005] Therefore, there is a need in the art for a new leg rest and seat to solve at least one of the above-mentioned technical problems. Summary of the Utility Model

[0006] The purpose of the present application is to provide a leg rest.

[0007] The purpose of the present application is to provide a seat.

[0008] In a first aspect, the present application provides a leg rest, including a deployable component, including: a first section; a second section capable of relatively moving with respect to the first section in the deployment direction or retraction direction of the leg rest, and defining the direction of the relative movement of the second section with respect to the first section in the deployment direction or retraction direction of the leg rest as the first direction; a driving component connected to the first section and the second section to drive the deployment or retraction of the second section with respect to the first section, the driving component including: a driving mechanism, the output end of the driving mechanism is used to drive the second section to move with respect to the first section in the first direction; a scissor mechanism connecting the first section and the second section, the scissor mechanism amplifying the driving stroke of the driving mechanism; wherein, the driving mechanism is arranged on one side of the first section, the scissor mechanism is arranged on the other side of the first section, and the two are separated by the first section, the first section has a chute extending in the first direction, and the driving mechanism is connected to the scissor mechanism through a sliding member passing through the chute to drive the scissor mechanism.

[0009] In the solution of the leg rest introduced in the above embodiments, by providing a sliding groove in the first section, the driving mechanism is connected to the scissor mechanism through a sliding member passing through the sliding groove to drive the scissor mechanism. Compared with the existing solutions for amplifying the stroke of the scissor mechanism, on the basis of achieving a larger unfolding stroke with a compact structure of the leg rest, the unfolding and folding processes of the leg rest, as well as its stability in the unfolded state, are all better, improving the user experience of the user.

[0010] In one or more embodiments of the leg rest, the first section includes a first housing, and the second section includes a second housing; when the leg rest is in the folded state, the first housing covers the second housing and the range of the driving assembly, so that the space occupied by the leg rest in the folded state is the space occupied by the first housing; the maximum unfolding stroke of the leg rest is 200 mm - 300 mm.

[0011] In one or more embodiments of the leg rest, the driving mechanism includes a screw motor, including a screw nut mechanism and a motor. The motor is fixedly connected to the first section. The screw member of the screw nut mechanism receives the rotation output from the motor. The nut member of the screw nut mechanism is a moving member, and the nut member is connected to the scissor mechanism through a sliding member passing through the sliding groove. The scissor mechanism is driven to move by the displacement of the nut member relative to the screw member; or the nut member of the screw nut mechanism is a fixed member, and the screw member is a moving member. The screw member is connected to the scissor mechanism through a sliding member passing through the sliding groove, and the scissor mechanism is driven to move by the displacement of the screw member relative to the nut member.

[0012] In one or more embodiments of the leg rest, the driving mechanism is disposed on one side of the first housing of the first section, and the scissor mechanism is disposed on the other side of the first housing of the first section. The two are separated by the first housing. The first housing has a sliding groove extending in the first direction, and the nut member is fixedly connected to the scissor mechanism through a sliding member passing through the sliding groove.

[0013] In one or more embodiments of the leg support, the scissor mechanism includes a first link group, a second link group, and a third link group; wherein, the first link group includes a first link and a second link, the first link and the second link cross and are connected by a first hinge, and are fixedly connected to the first section through the first hinge; the second link group includes a third link and a fourth link, the third link and the fourth link cross and are connected by a second hinge, and the second hinge is fixedly connected to the nut member, the third link is connected to the first link through a movable third hinge, and the fourth link is connected to the second link through a movable fourth hinge; the third link group includes a fifth link and a sixth link, the fifth link and the sixth link cross and are connected by a fifth hinge, and are fixedly connected to the second section through the fifth hinge, the fifth link is connected to the third link through a movable sixth hinge, and the sixth link is connected to the fourth link through a movable seventh hinge.

[0014] In one or more embodiments of the leg support, a rod assembly is further included, the second section and the first section are connected by the rod assembly, the rod assembly includes a first rod fixedly connected to the first section, a second rod fixedly connected to the second section, and a third rod located between the first rod and the second rod, the third rod can move relative to the first rod in the first direction, the second rod can move relative to the third rod in the first direction, first sliding parts and second sliding parts are respectively connected to two sides of the third rod in the length direction, the first sliding part is in sliding cooperation with the first rod, the second sliding part is in sliding cooperation with the second rod, a first stop part is provided on the first section, a second stop part is provided on the second section, the first stop part can stop the relative sliding of the first sliding part in the first direction, and the second stop part can stop the relative sliding of the second sliding part in the first direction.

[0015] In one or more embodiments of the leg support, the first sliding part includes a first bush kit, the second sliding part includes a second bush kit, the first bush kit is sleeved on the first rod to form sliding cooperation with the first rod, and the second bush kit is sleeved on the second rod to form sliding cooperation with the second rod.

[0016] In one or more embodiments of the leg rest, when the leg rest is in the retracted state, the first sliding portion abuts against the first stop portion at the first end of the first section in the first direction, and the second sliding portion abuts against the second stop portion at the second end of the second section in the first direction; when the leg rest is in the deployed state, the first sliding portion abuts against the first stop portion at the second end of the first section in the first direction, and the second sliding portion abuts against the second stop portion at the first end of the second section in the first direction. The deployment stroke of the leg rest is the length of the first sliding portion and the second sliding portion in the first direction.

[0017] In one or more embodiments of the leg rest, the material of the rod assembly is plastic.

[0018] In a second aspect, the present application provides a seat, including a seat body and a leg rest as introduced in the first aspect, and the leg rest is connected to the lower part of the seat body.

[0019] The beneficial effect is that, due to the adoption of the leg rest introduced in the first aspect, the lower legs of the seat users can be stably supported by the leg rest, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features, properties and advantages of the present application will become more obvious through the following description with reference to the drawings and embodiments, where:

[0021] Figure 1 is a schematic diagram of a seat according to an embodiment.

[0022] Figure 2 is a schematic structural diagram of a leg rest in the retracted state according to an embodiment.

[0023] Figure 3 is a schematic structural diagram of a leg rest between the retracted state and the deployed state according to an embodiment.

[0024] Figure 4A 、 Figure 4B are schematic structural diagrams of a leg rest in the deployed state from different perspectives according to an embodiment.

[0025] Figure 5A 、 Figure 5B are respectively connection schematic diagrams of a scissor mechanism and a driving mechanism of a leg rest according to an embodiment.

[0026] Reference Signs:

[0027] 100 - leg rest

[0028] 101 - retracted state

[0029] 102 - deployed state

[0030] 200 - Seat

[0031] 300 - Seat Body

[0032] 1 - Deployable Component

[0033] 11 - First Section

[0034] 110 - First Housing

[0035] 1101 - Slide Groove

[0036] 1102 - Sliding Part

[0037] 111 - First Stopping Portion

[0038] 12 - Second Section

[0039] 120 - Second Housing

[0040] 121 - Second Stopping Portion

[0041] 3 - Rod Assembly

[0042] 31 - First Rod

[0043] 32 - Second Rod

[0044] 33 - Third Rod

[0045] 341 - First Sliding Portion

[0046] 3410 - First Shaft Kit

[0047] 342 - Second Sliding Portion

[0048] 3420 - Second Shaft Kit

[0049] 2 - Driving Component

[0050] 21 - Driving Mechanism

[0051] 211 - Lead Screw Nut Mechanism

[0052] 2111 - Lead Screw Part

[0053] 2112 - Nut Part

[0054] 212 - Motor

[0055] 22 - Scissor Mechanism

[0056] 221 - First Link Group

[0057] 222 - Second Link Group

[0058] 223 - Third Link Group

[0059] 2211 - First Link

[0060] 2212 - Second connecting rod

[0061] 2223 - Third connecting rod

[0062] 2224 - Fourth connecting rod

[0063] 2235 - Fifth connecting rod

[0064] 2236 - Sixth connecting rod

[0065] 2241 - First hinge

[0066] 2242 - Second hinge

[0067] 2243 - Third hinge

[0068] 2244 - Fourth hinge

[0069] 2245 - Fifth hinge

[0070] 2246 - Sixth hinge

[0071] 2247 - Seventh hinge. Detailed implementation manners

[0072] The present application will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present application. However, the present application is obviously capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present application. Therefore, the scope of protection of the present application should not be limited by the content of this specific embodiment.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0074] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0075] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0076] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0077] The armrest and its application scenarios disclosed in the embodiments of the present application take the leg rest of a vehicle seat as an example, especially applicable to zero-gravity seats with a flat mode. However, it can be understood that it can also be other means of transportation, such as trains, airplanes, ships, etc. In addition, the seats applicable to the leg rest are not limited to the seats of means of transportation. For example, it can also be the seats in fixed places, such as massage chairs, seats for the audience in large-scale competitions and conferences, office chairs, and so on. The seats are not limited to stationary seats. For example, it can also be a wheelchair.

[0078] Referring Figure 1 As shown, in some embodiments, the seat 200 includes a seat body 300 and a leg rest 100 that will be specifically introduced in the following embodiments. The leg rest 100 is connected to the lower part of the seat body 300 to provide support for the legs of the occupant. Figure 1 The leg rest 100 shown can be understood to be in the deployed state 102 to provide support for the lower legs of the seat user. By adopting the leg rest 100 introduced in the following embodiments, the leg rest can support the lower legs of the user more stably.

[0079] Referring Figures 2 to 4B As shown, the leg rest 100 includes a deployable component 1 and a drive component 2.

[0080] The deployable component 1 includes a first section 11 and a second section 12, which can move relative to the first section 11 in the deployment direction or the retraction direction of the leg rest; the direction in which the second section 12 moves relative to the first section 11 in the deployment direction or the retraction direction of the leg rest is defined as the first direction. In some embodiments, the first section 11 is a fixed member and the second section 12 is a movable member.

[0081] Reference Figure 2 As shown, the leg rest 100 is in the retracted state 101, until Figure 4A , Figure 4B As shown, the leg rest 100 is in the deployed state 102. At this time, the second section 12 is located at the end point of the deployment stroke relative to the first section 11, Figure 3 As shown, the leg rest 100 is in the intermediate state 103 between the retracted state 101 and the deployed state 102, that is, the second section 12 is located at an intermediate position point between the end point of the deployment stroke and the retracted end point relative to the first section 11.

[0082] Continue to refer to Figures 2 to 4B As shown, the drive assembly 2 is connected to the first section 11 and the second section 12 to drive the deployment or retraction of the second section 12 relative to the first section 11. The drive assembly 2 includes: a drive mechanism 21, the output end of the drive mechanism 21 is used to drive the second section 12 to move relative to the first section 11 in the first direction; a scissor mechanism 22, the scissor mechanism 22 is connected to the first section 11 and the second section 12, and the scissor mechanism 22 amplifies the driving stroke of the drive mechanism 21. In some embodiments, the maximum deployment stroke that the leg rest 100 can achieve is 200 mm - 300 mm. The meaning of the scissor mechanism 22 can also be called a scissor - type structure, which is similar to the common meaning in the art, that is, through the superposition of planar link mechanisms, the telescopic movement is achieved through the change of the angle of the link mechanism to realize the lifting and height adjustment. Due to the cross - setting of the links, it is called a scissor mechanism.

[0083] Continue to refer to Figure 2 , and Figure 5A , Figure 5B As shown, the drive mechanism 21 is arranged on one side of the first section 11, and the scissor mechanism 22 is arranged on the other side of the first section 11. The two are separated by the first section 11. The first section 11 has a chute 1101 extending in the first direction. The drive mechanism 21 is connected to the scissor mechanism 22 through a slider 1102 passing through the chute 1101 to drive the scissor mechanism 22.

[0084] The beneficial effects of adopting the above - mentioned embodiments include but are not limited to that, by arranging a chute in the first section, and the drive mechanism is connected to the scissor mechanism through a slider passing through the chute to drive the scissor mechanism. Compared with the existing scheme of amplifying the stroke of the scissor mechanism, on the basis of realizing a large deployment stroke of the leg rest with a compact structure, the deployment and retraction process of the leg rest, and the stability in the deployed state are all better.

[0085] Continue to refer to Figures 2 to 5BAs shown, in some embodiments, the specific structures of the first section 11 and the second section 12 may be such that the first section 11 includes a first housing 110, and the second section 12 includes a second housing 120; when the leg rest 100 is in the retracted state 101, the first housing 110 covers the second housing 120 and the range of the drive assembly 2, so that the space occupied by the leg rest 100 in the retracted state 101 is the space occupied by the first housing 110. In this way, the leg rest 100 can occupy a smaller area and have a compact structure when retracted.

[0086] Continue to refer to Figures 2 to 5B As shown, in some embodiments, the specific structure of the drive mechanism 21 may be that the drive mechanism 21 includes a lead screw motor, including a lead screw nut mechanism 211 and a motor 212. The motor 212 is fixedly connected to the first section 11. The lead screw member 2111 of the lead screw nut mechanism 211 receives the rotation output from the motor 212. The nut member 2112 of the lead screw nut mechanism 211 is a moving member. The nut member 2112 is connected to the scissor mechanism 22 through a sliding member 1102 passing through the chute 1101. The scissor mechanism 22 is driven to move by the displacement of the nut member 2112 along the lead screw member 2111. The structure driven by the nut member 2112 is relatively stable. However, this is not a limitation. For example, it may also be that the nut member of the lead screw nut mechanism is a fixed member, and the lead screw member is a moving member. The lead screw member 2111 is connected to the scissor mechanism 22 through a sliding member 1102 passing through the chute 1101. The scissor mechanism 22 is driven to move by the displacement of the lead screw member 2111 relative to the nut member 2112.

[0087] In some embodiments, the drive mechanism 21 is disposed on one side of the first housing 110 of the first section 11, and the scissor mechanism 22 is disposed on the other side of the first housing 110 of the first section 11. The two are separated by the first housing 110. The first housing 110 has a chute 1101 extending in the first direction. The nut member 2112 is fixedly connected to the scissor mechanism 22 through a sliding member 1102 passing through the chute 1101.

[0088] Continue to refer to Figures 2 to 5BAs shown, in some embodiments, the specific structure of the scissors mechanism 22 may be that the scissors mechanism 22 includes a first link group 221, a second link group 222, and a third link group 223. Among them, the first link group 221 includes a first link 2211 and a second link 2212. The first link 2211 and the second link 2212 cross and are connected through a first hinge 2241, and are fixedly connected to the first section 11 through the first hinge 2241. The second link group 222 includes a third link 2223 and a fourth link 2224. The third link 2223 and the fourth link 2224 cross and are connected through a second hinge 2242, and the second hinge 2242 is fixedly connected to the nut member 2112, that is, fixedly connected to the nut member 2112 through the sliding member 1102. The sliding member 1102 may be, for example, a pin member, but is not limited thereto. The third link 2223 is connected to the first link 2211 through a movable third hinge 2243, and the fourth link 2224 is connected to the second link 2212 through a movable fourth hinge 2244. The third link group 223 includes a fifth link 2235 and a sixth link 2236. The fifth link 2235 and the sixth link 2236 cross and are connected through a fifth hinge 2245, and are fixedly connected to the second section 12 through the fifth hinge 2245. The fifth link 2235 is connected to the third link 2223 through a movable sixth hinge 2246, and the sixth link 2236 is connected to the fourth link 2224 through a movable seventh hinge 2247. The scissors mechanism with such a structure has a better effect of amplifying the driving stroke. It can be understood that the form of hinge connection may be common hinge connection structures such as screws, bolts, rivets, and pins, but is not limited thereto, and will not be elaborated here.

[0089] Continue to refer to Figures 2 to 4BAs shown, in some embodiments, the leg rest 100 may further include a rod assembly 3. The second section 12 and the first section 11 are connected by the rod assembly 3. The rod assembly 3 includes a first rod 31 fixedly connected to the first section 11, a second rod 32 fixedly connected to the second section 12, and a third rod 33 located between the first rod 31 and the second rod 32. The third rod 33 can move relative to the first rod 31 in a first direction, and the second rod 32 can move relative to the third rod 33 in the first direction. On both sides of the third rod 33 in the length direction, a first sliding portion 341 and a second sliding portion 342 are respectively connected. The first sliding portion 341 is slidably engaged with the first rod 31, and the second sliding portion 342 is slidably engaged with the second rod 32. The first section 11 is provided with a first stop portion 111, and the second section 12 is provided with a second stop portion 121. The first stop portion 111 can stop the relative sliding of the first sliding portion 341 in the first direction, and the second stop portion 121 can stop the relative sliding of the second sliding portion 342 in the first direction. The beneficial effect of this is that by setting the structure of the rod assembly, that is, the first rod, the second rod, the third rod, and the cooperation relationship between the first sliding portion and the first stop portion, and the second sliding portion and the second stop portion, a multi-section unfolding structure of the leg rest is realized through the structure of the rod assembly. Compared with the traditional slide rail scheme, the rod assembly scheme not only simplifies the structure, reduces the occupied space, but also can reduce the overall weight of the leg rest. While achieving lightweight, it can also reduce the manufacturing cost. In some embodiments, the material of the rod assembly can be plastic, which can further reduce the cost and optimize the lightweight effect.

[0090] In some embodiments, the structure for realizing sliding can be the sliding of the shaft-sleeve fit. Specifically, the first sliding portion 341 may include a first bush kit 3410, and the second sliding portion 342 may include a second bush kit 3420. The first bush kit 3410 is sleeved on the first rod 31 to form a sliding fit with the first rod 31, and the second bush kit 3420 is sleeved on the second rod 342 to form a sliding fit with the second rod 342. Refer to Figure 2 and Figure 4A 、 Figure 4B As shown, the structure of the rod assembly providing the unfolding stroke can be, as Figure 2 shown, when the leg rest 100 is in the retracted state 101, the first sliding portion 341 is stopped by the first stop portion 111 at the first end of the first section 11 provided in the first direction, and the second sliding portion 341 is stopped by the second stop portion 121 at the second end of the second section provided in the first direction; as Figure 4A 、 Figure 4BWhen the leg rest 100 is in the deployed state 102, the first sliding portion 341 abuts against the first stop portion 111 provided at the second end of the first section 11 in the first direction, and the second sliding portion 341 abuts against the second stop portion 121 provided at the first end of the second section in the first direction. The deployment stroke of the leg rest 100 is the length of the first sliding portion 341 and the second sliding portion 342 in the first direction.

[0091] In summary, the beneficial effects of the leg rest and the seat introduced in the above embodiments include, but are not limited to: by providing a sliding groove in the first section, the driving mechanism is connected to the scissor mechanism through a sliding member passing through the sliding groove to drive the scissor mechanism. Compared with the existing scissor mechanism amplification stroke scheme, on the basis of realizing a large deployment stroke with a compact structure of the leg rest, the deployment and retraction processes of the leg rest, as well as the stability in the deployed state, are all better, so that the lower legs of the seat user can be stably supported by the leg rest, improving the user experience.

[0092] Although this application is disclosed above with preferred embodiments, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. All modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A leg support (100), characterized in that: include: The expandable component (1) includes: Paragraph 1 (11); The second section (12) is capable of moving relative to the first section (11) in the direction of expansion or folding of the leg support, and the direction in which the second section (12) moves relative to the first section (11) in the direction of expansion or folding of the leg support is defined as a first direction; A driving assembly (2) is connected to the first section (11) and the second section (12) to drive the second section (12) to expand or collapse relative to the first section (11), and the driving assembly (2) comprises: a driving mechanism (21), wherein an output end of the driving mechanism (21) is used to drive the second section (12) to move in the first direction relative to the first section (11); A scissor-fork mechanism (22), wherein the scissor-fork mechanism (22) connects the first section (11) and the second section (12), and the scissor-fork mechanism (22) amplifies the driving stroke of the driving mechanism (21); The driving mechanism (21) is arranged on one side of the first section (11), and the scissor-type mechanism (22) is arranged on the other side of the first section (11), and the two are separated by the first section (11); the first section (11) has a slide groove (1101) extending in a first direction; the driving mechanism (21) is connected to the scissor-type mechanism (22) via a sliding member (1102) passing through the slide groove (1101) to drive the scissor-type mechanism (22).

2. The leg support (100) according to claim 1, characterized in that: The first section (11) includes a first shell (110), and the second section (12) includes a second shell (120); when the leg rest (100) is in the folded state (101), the second shell (120) covers the range of the first shell (110) and the drive assembly (2), so that the space occupied by the leg rest (100) in the folded state (101) is the space occupied by the second shell (120); the maximum unfolding stroke of the leg rest (100) is 200mm-300mm.

3. The leg support (100) according to claim 1, characterized in that: The driving mechanism (21) comprises a screw motor, a screw nut mechanism (211) and a motor (212); the motor (212) is fixedly connected to the first section (11); a screw member (2111) of the screw nut mechanism (211) receives the rotation output from the motor (212); the nut member (2112) of the screw nut mechanism (211) is a moving member; the nut member (2112) is connected to the scissors fork via a sliding member (1102) passing through the sliding groove (1101). The scissor mechanism (22) is connected to the scissor mechanism (22), and the scissor mechanism (22) is driven to move by the displacement of the nut member (2112) relative to the screw member (2111); or the nut member of the screw nut mechanism is a fixed member, and the screw member is a movable member, and the screw member (2111) is connected to the scissor mechanism (22) via a sliding member (1102) passing through the slide groove (1101), and the scissor mechanism (22) is driven to move by the displacement of the screw member (2111) relative to the nut member (2112).

4. The leg support (100) according to claim 3, characterized in that: The driving mechanism (21) is arranged on one side of the first shell (110) of the first section (11), and the scissor mechanism (22) is arranged on the other side of the first shell (110) of the first section (11), and the two are separated by the first shell (110), and the first shell (110) has a slide groove (1101) extending in a first direction, and the nut member (2112) is fixedly connected to the scissor mechanism (22) via a sliding member (1102) passing through the slide groove (1101).

5. The leg support (100) according to claim 3, characterized in that: The scissor-fork mechanism (22) comprises a first connecting rod group (221), a second connecting rod group (222), and a third connecting rod group (223); wherein the first connecting rod group (221) comprises a first connecting rod (2211) and a second connecting rod (2212), the first connecting rod (2211) and the second connecting rod (2212) are cross-connected by a first hinge (2241), and are fixedly connected to the first section (11) by the first hinge (2241); the second connecting rod group (222) comprises a third connecting rod (2223) and a fourth connecting rod (2224), the third connecting rod (2223) and the fourth connecting rod (2224) are cross-connected by a second hinge (2242), and the second hinge (2242) is fixedly connected to the nut member (2112), and the third connecting rod (2211) and the second connecting rod (2212) are cross-connected by a second hinge (2242). 2223) is connected to the first link (2211) through a movable third hinge (2243), and the fourth link (2224) is connected to the second link (2212) through a movable fourth hinge (2244); the third link group (223) includes a fifth link (2235) and a sixth link (2236), the fifth link (2235) and the sixth link (2236) are cross-connected through a fifth hinge (2245), and are fixedly connected to the second section (12) through the fifth hinge (2245), the fifth link (2235) is connected to the third link (2223) through a movable sixth hinge (2246), and the sixth link (2236) is connected to the fourth link (2224) through a movable seventh hinge (2247).

6. The leg support (100) according to claim 1, characterized in that: The invention also comprises a rod assembly (3), wherein the second section (12) is connected to the first section (11) through the rod assembly (3), wherein the rod assembly (3) comprises a first rod (31) fixedly connected to the first section (11), a second rod (32) fixedly connected to the second section (12), and a third rod (33) located between the first rod (31) and the second rod (32), wherein the third rod (33) can move in the first direction relative to the first rod (31), and the second rod (32) can move in the first direction relative to the third rod (33), and the third rod (33) can move in the length direction. A first sliding part (341) and a second sliding part (342) are respectively connected on both sides, the first sliding part (341) is slidably matched with the first rod (31), and the second sliding part (342) is slidably matched with the second rod (32), the first section (11) is provided with a first stopping part (111), and the second section (12) is provided with a second stopping part (121), the first stopping part (111) can stop the first sliding part (341) from sliding relative to each other in the first direction, and the second stopping part (121) can stop the second sliding part (342) from sliding relative to each other in the first direction.

7. The leg support (100) according to claim 6, characterized in that: The first sliding part (341) includes a first bushing member (3410), and the second sliding part (342) includes a second bushing member (3420). The first bushing member (3410) is sleeved on the first rod (31) to form a sliding fit with the first rod (31), and the second bushing member (3420) is sleeved on the second rod (32) to form a sliding fit with the second rod (32).

8. The leg support (100) according to claim 6, characterized in that: When the leg rest (100) is in the folded state (101), the first sliding part (341) and the first section (11) are stopped by the first stopping part (111) at the first end in the first direction, and the second sliding part (342) and the second section are stopped by the second stopping part (121) at the second end in the first direction; when the leg rest (100) is in the unfolded state (102), the first sliding part (341) and the first section (11) are stopped by the first stopping part (111) at the second end in the first direction, and the second sliding part (342) and the second section are stopped by the second stopping part (121) at the first end in the first direction. The unfolding stroke of the leg rest (100) is the length of the first sliding part (341) and the second sliding part (342) in the first direction.

9. The leg support (100) according to claim 6, characterized in that: The rod assembly is made of plastic.

10. A seat (200), characterized in that: It comprises a seat body (300) and a leg rest (100) as claimed in any one of claims 1 to 9, wherein the leg rest (100) is connected to the lower part of the seat body (300).

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