Leg support and seat

Abstract

The utility model provides a leg support and a seat. The leg support comprises a plurality of sections of deployable assemblies which comprise a first section, a second section and a third section, the second section can move relative to the first section in the unfolding direction or the folding direction of the leg support; the third section can move relative to the second section in the unfolding direction or the folding direction of the leg support; the driving assembly is connected with the multi-section deployable assembly so as to drive the multi-section deployable assembly to be unfolded or folded, the driving assembly comprises a driving mechanism, the output end of the driving mechanism is connected with the second section, and the driving mechanism outputs linear motion to drive the second section to move so as to provide a driving stroke; the scissor fork mechanism is connected with the first section, the second section and the third section, and the scissor fork mechanism amplifies the driving stroke so as to provide the unfolding stroke of the leg support.

Description

Technical Field

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

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

[0003] In some solutions, the leg rest is folded and placed under the seat, and unfolded when needed. However, due to the limited space under the seat, the size of the mechanism corresponding to the leg rest for unfolding is limited, and because the leg rest is generally subjected to greater force, its reliability requirements are also higher, so the unfolding stroke of the leg rest from folding to unfolding is relatively small, and the leg support effect needs to be further improved.

[0004] Therefore, there is a need in the art for a new leg rest and a seat to solve at least one of the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this application is to provide a leg support.

[0006] The purpose of this application is to provide a seat.

[0007] In the first aspect, the present application provides a leg rest, comprising a multi-section expandable component, including: a first section; a second section, capable of moving relative to the first section in the expansion direction or the folding direction of the leg rest; a third section, capable of moving relative to the second section in the expansion direction or the folding direction of the leg rest; a driving component, connected to the multi-section expandable component to drive the expansion or folding of the multi-section expandable component, the driving component comprising: a driving mechanism, the output end of the driving mechanism is connected to the second section, the output linear motion drives the second section to move, so as to provide a driving stroke; a scissors mechanism, the scissors mechanism connects the first section, the second section, and the third section, the scissors mechanism amplifies the driving stroke to provide an expansion stroke of the leg rest.

[0008] The leg rest scheme introduced in the above embodiment combines a multi-section expandable component with a scissor-fork mechanism of a driving component, provides a maximum travel of the leg rest for expansion through relative movement between the multiple sections, and amplifies the driving stroke of the driving mechanism through the scissor-fork mechanism, thereby realizing expansion of the leg rest through linear motion drive, and through the amplification of the scissor-fork mechanism, the leg rest has a longer height adjustment stroke, further improving the effect of the leg rest in supporting the legs, and has good reliability, high rigidity and good stability after expansion, and at the same time, the leg rest has a compact structure.

[0009] In one or more embodiments of the leg support, the driving mechanism includes a screw motor, including a screw and a motor, the motor is fixedly connected to the first section via a first bracket, and the screw is connected to the second section via a second bracket.

[0010] In one or more embodiments of the leg support, the first section is a fixed part, and the second section and the third section are movable parts.

[0011] In one or more embodiments of the leg rest, first sliding parts extending along the unfolding direction or the folding direction are respectively provided on both sides of the width direction of the first section, and second sliding parts extending along the unfolding direction or the folding direction are respectively provided on both sides of the width direction of the third section, and when the multi-section expandable assembly is unfolded or folded, the first sliding part and the second sliding part slide relative to each other in cooperation.

[0012] In one or more embodiments of the leg rest, the first section has a first plate-like member, the second section has a second plate-like member, and the third section has a third plate-like member. When the multi-section expandable assembly is in a folded state, the third plate-like member covers the first plate-like member and the second plate-like member, and the occupied area of ​​the leg rest is the occupied area of ​​the third plate-like member.

[0013] In one or more embodiments of the leg rest, the scissor-type mechanism includes a first link group, a second link group connected to the first link group, and a third link group connected to the second link group; wherein the first link group is fixedly connected to the first section, the second link group is fixedly connected to the second section, and the third link group is fixedly connected to the third section.

[0014] In one or more embodiments of the leg support, the first link group includes a first link and a second link, the first link and the second link are cross-connected by a first hinge, and are fixedly connected to the first section by the first hinge; the second link group includes a third link and a fourth link, the third link and the fourth link are cross-connected by a second hinge, and are fixedly connected to the second section by the second hinge, the third link is connected to the first link by a movable third hinge, and the fourth link is connected to the second link by a movable fourth hinge; the third link group includes a fifth link and a sixth link, the fifth link and the sixth link are cross-connected by a fifth hinge, and are fixedly connected to the third section by the fifth hinge, the fifth link is connected to the third link by a movable sixth hinge, and the sixth link is connected to the fourth link by a movable seventh hinge.

[0015] In one or more embodiments of the leg rest, the second section has a second slide groove, and the third section has a third slide groove; the first section and the second section are connected by a first connecting member arranged on the second slide groove, and when the second section moves relative to the first section in the expansion direction or the folding direction of the leg rest, the first connecting member and the second slide groove slide relative to each other; the second section and the third section are connected by a second connecting member arranged on the third slide groove, and when the third section moves relative to the second section in the expansion direction or the folding direction of the leg rest, the second connecting member and the third slide groove slide relative to each other.

[0016] In one or more embodiments of the leg rest, the maximum deployment stroke of the leg rest is 200mm-300mm.

[0017] In a second aspect, the present application provides a seat, comprising a seat body and a leg rest as described in the first aspect, wherein the leg rest is connected to a lower portion of the seat body.

[0018] The beneficial effect is that, due to the use of the leg rest introduced in the first aspect, the lower space of the seat is made compact, and can provide a better leg support effect, thereby improving the comfort of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0020] Figure 1 A schematic diagram of a seat according to an embodiment.

[0021] Figure 2 It is a schematic structural diagram of a leg rest in a folded state according to an embodiment.

[0022] Figure 3A , Figure 3B , Figure 3C The diagrams are schematic diagrams of the structure of a leg rest according to an embodiment in an unfolded state from the front, back and another perspective respectively.

[0023] Reference numerals:

[0024] 100-Leg Support

[0025] 200-seats

[0026] 300-Seat body

[0027] 1-Multi-section expandable components

[0028] 11-First Quarter

[0029] 111-first sliding portion

[0030] 112-First plate member

[0031] 12-Second Quarter

[0032] 121- second plate-like member

[0033] 122-Second chute

[0034] 13-3rd Quarter

[0035] 131- Second sliding part

[0036] 133-third plate-like member

[0037] 134-Third chute

[0038] 141-First connecting piece

[0039] 142-Second connecting piece

[0040] 2-Drive components

[0041] 21- Driving mechanism

[0042] 211-Screw

[0043] 212-Motor

[0044] 213-First bracket

[0045] 214-Second bracket

[0046] 22-Scissor mechanism

[0047] 221-First connecting rod group

[0048] 222-Second connecting rod group

[0049] 223-Third connecting rod group

[0050] 2211-First connecting rod

[0051] 2212-Second connecting rod

[0052] 2223-Third connecting rod

[0053] 2224-Fourth connecting rod

[0054] 2235-Fifth connecting rod

[0055] 2236-Sixth connecting rod

[0056] 2241-First hinge

[0057] 2242-Second hinge

[0058] 2243-Third hinge

[0059] 2244-Fourth hinge

[0060] 2245-Fifth hinge

[0061] 2246-Sixth hinge

[0062] 2247-Seventh hinge. DETAILED DESCRIPTION

[0063] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0065] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0068] The armrest and its application scenario disclosed in the embodiment of the present application take the leg rest of a vehicle seat as an example. However, it can be understood that it can also be other means of transportation, such as trains, airplanes, ships and other means of transportation. In addition, the seats applicable to the leg rest are not limited to seats of means of transportation, for example, they can also be seats in fixed places, such as massage chairs, seats for audience seats for large-scale events and conferences, office chairs, etc. The seats are not limited to fixed seats, for example, they can also be wheelchairs.

[0069] refer to Figure 1 As shown, in some embodiments, the seat 200 includes a seat body 300 and a leg support 100 as will be specifically described in the following embodiments, the leg support 100 is connected to the lower portion of the seat body 300 to provide support for the legs of the occupant, Figure 1 The leg rest 100 shown in the figure can be understood to be in a folded state, and the leg rest 100 can be further unfolded and extended to further improve the supporting effect on the legs.

[0070] refer to Figure 2 as well as FIG. 3A to FIG. 3C As shown, the leg support 100 includes a multi-section expandable component 1 and a drive component 2.

[0071] The multi-section expandable assembly 1 includes a first section 11; a second section 12, which can move relative to the first section 11 in the expansion direction or the folding direction of the leg rest; and a third section 13, which can move relative to the second section 12 in the expansion direction or the folding direction of the leg rest. The relative movement of the three can refer to the expansion and folding of the three-section slide rail. In some embodiments, the first section 11 is a fixed part, and the second section 12 and the third section 13 are movable parts.

[0072] like Figure 2 As shown, in some embodiments, the specific structures of the first section 11, the second section 12 and the third section 13 can be that the first section 11 has a first plate-shaped member 112, the second section 12 has a second plate-shaped member 121, and the third section 13 has a third plate-shaped member 133, as shown in FIG. Figure 2 As shown, when the multi-section expandable component 1 is in the folded state, the third plate-shaped member 133 covers the first plate-shaped member 112 and the second plate-shaped member 121, and the occupied area of ​​the leg rest 100 is the occupied area of ​​the third plate-shaped member 133. In this way, the leg rest 100 occupies a smaller area when folded, and the structure is compact.

[0073] Continue to refer Figure 2 as well as FIG. 3A to FIG. 3C As shown, in some embodiments, the structure in which the second section 12 moves relative to the first section 11 in the expansion direction or the folding direction of the leg rest, and the third section 13 moves relative to the second section 12 in the expansion direction or the folding direction of the leg rest may include: the second section 12 has a second slide groove 122, and the third section 13 has a third slide groove 134; the first section 11 and the second section 12 are connected by a first connecting member 141 arranged on the second slide groove 122, and when the second section 12 moves relative to the first section 11 in the expansion direction or the folding direction of the leg rest, the first connecting member 141 and the second slide groove 122 slide relative to each other; the second section 12 and the third section 13 are connected by a second connecting member 142 arranged on the third slide groove 134, and when the third section 13 moves relative to the second section 12 in the expansion direction or the folding direction of the leg rest, the second connecting member 142 and the third slide groove 134 slide relative to each other. It can be understood that the extension direction of the second slide groove 122 and the third slide groove 134 are the expansion direction or the folding direction of the above-mentioned leg rest. The first connecting member 141 and the second connecting member 142 can specifically be in the form of step bolts and nuts, but are not limited to this. The structure of relative sliding between the slide groove and the connecting member is compact and reliable.

[0074] refer to FIG. 3A to FIG. 3C As shown, in some embodiments, first sliding portions 111 extending along the expansion direction or the folding direction are respectively provided on both sides of the width direction of the first section 11, and second sliding portions 131 extending along the expansion direction or the folding direction are respectively provided on both sides of the width direction of the third section 13. When the multi-section expandable component 1 is expanded or folded, the first sliding portion 111 and the second sliding portion 131 cooperate to slide relative to each other, which can further improve the structural stability during expansion.

[0075] The driving assembly 2 is connected to the multi-section expandable assembly 1 to drive the expansion or folding of the multi-section expandable assembly 1. The driving assembly 2 includes: a driving mechanism 21, the output end of which is connected to the second section 13, and the output linear motion drives the second section 13 to move to provide a driving stroke; a scissor mechanism 22, which connects the first section 11, the second section 12, and the third section 13, and the scissor mechanism 22 amplifies the driving stroke to provide the expansion stroke of the leg support 100. The stroke provided by the driving mechanism 21 is the driving stroke, and the scissor mechanism 22 amplifies the driving stroke to provide the expansion stroke of the leg support 100.

[0076] The unfolding stroke of the leg support 100 can be referred to from Figure 2 The collapsed state to FIG. 3A to FIG. 3C The deployed state shown shows the second section 12 deployed relative to the first section 11 , and the third section 13 deployed relative to the second section 12 .

[0077] The meaning of the driving mechanism 21, as the name implies, is to provide the driving force of the driving assembly 2. In some embodiments, it can be as follows Figure 3B The screw motor shown includes a screw 211 and a motor 212. The motor 212 is fixedly connected to the first section 11 through a first bracket 213, and the screw 211 is connected to the second section 13 through a second bracket 214. That is, by using the screw (screw) and the nut to engage with each other, the screw (screw) and the nut are prevented from rotating relative to each other, so that the screw (screw) moves axially. Generally speaking, there are two ways to achieve this conversion. The first is to build a rotor with internal threads into the motor, and the internal threads of the rotor are engaged with the screw (screw) to achieve linear motion. The second is to use the screw (screw) as the motor output shaft, and an external drive nut is engaged with the screw outside the motor to achieve linear motion. The solution using a screw motor has a compact structure and low cost.

[0078] The meaning of the scissor-fork mechanism 22 can also be a scissors-fork structure, which is similar to the general meaning in this field, that is, through the superposition of planar connecting rod mechanisms, the extension and retraction are achieved through the change of the angle of the connecting rod mechanism to achieve the function of lifting and lowering to adjust the height. Due to the cross setting of the connecting rods, it is called a scissor-fork mechanism.

[0079] Continue to refer FIG. 3A to FIG. 3C As shown, in some embodiments, the scissor mechanism 22 may include a first link group 221, a second link group 222 connected to the first link group 221, and a third link group 223 connected to the second link group 222; wherein the first link group 221 is fixedly connected to the first section 11, the second link group 222 is fixedly connected to the second section 12, and the third link group 223 is fixedly connected to the third section 13. Such a beneficial effect is that the structural rigidity can be further improved, thereby further reducing the risk of shaking in the unfolded state.

[0080] In some embodiments, the first link group 221 includes a first link 2211 and a second link 2212, the first link 2211 and the second link 2212 are cross-connected by 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 are cross-connected by a second hinge 2242, and are fixedly connected to the second section 12 through the second hinge 2242, and the third link 2223 is connected to the first link 2223 through a movable third hinge 2243. 11, 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 the fifth hinge 2245, and are fixedly connected to the third section 13 through the fifth hinge 2245, the fifth link 2235 is connected to the third link 2223 through the movable sixth hinge 2246, and the sixth link 2236 is connected to the fourth link 2224 through the movable seventh hinge 2247, and the scissor mechanism of such a structure has a better effect of amplifying the driving stroke. It can be understood that the form of the hinge connection can be, for example, a common hinge connection structure such as a screw, a bolt, a rivet, a pin, etc., but it is not limited to this and will not be repeated here.

[0081] In summary, the beneficial effects of the leg rest and the seat introduced in the above embodiments include but are not limited to: by combining the multi-section expandable component with the scissor mechanism of the drive component, the maximum travel of the leg rest is provided through the relative movement between the multiple sections, and the drive travel of the drive mechanism is amplified by the scissor mechanism, so that the expansion of the leg rest is provided by linear motion drive, and the leg rest has a longer height adjustment travel through the amplification of the scissor mechanism, which further improves the effect of the leg rest in supporting the legs, improves the comfort of the seat, and has good reliability, high rigidity and good stability after expansion, and at the same time, the structure of the leg rest is compact, making the space of the seat compact. Specifically, the inventor found that, especially when the installation space at the bottom of the seat is limited, the combination of the multi-section expansion and the scissor mechanism can achieve a larger leg rest expansion travel by using a screw motor, a compact and low-cost drive mechanism. For example, for a certain model of seat, the maximum expansion travel of the leg rest can be 200mm-300mm, and the stability (rigidity) of the leg rest in the expanded state is good, and the shaking is small.

[0082] Although the utility model is disclosed as above in the form of a preferred embodiment, it is not intended to limit the utility model. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the utility model. Any changes, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the scope of protection defined by the claims of the utility model.

Claims

1. A leg support (100), characterized in that: include: A multi-section expandable component (1), comprising: Section 1 (11); The second section (12) is capable of moving relative to the first section (11) in the direction of unfolding or folding the leg support; The third section (13) is capable of moving relative to the second section (12) in the direction of unfolding or folding the leg support; A driving component (2) is connected to the multi-section expandable component (1) to drive the multi-section expandable component (1) to expand or collapse, and the driving component (2) comprises: A driving mechanism (21), wherein an output end of the driving mechanism (21) is connected to the second section (12), and outputs a linear motion to drive the second section (12) to move, thereby providing a driving stroke; A scissor mechanism (22), wherein the scissor mechanism (22) connects the first section (11), the second section (12), and the third section (13), and the scissor mechanism (22) amplifies the driving stroke to provide an unfolding stroke of the leg support (100).

2. The leg support (100) according to claim 1, characterized in that: The driving mechanism (21) comprises a screw motor, including a screw (211) and a motor (212); the motor (212) is fixedly connected to the first section (11) via a first bracket (213); and the screw (211) is connected to the second section (12) via a second bracket (214).

3. The leg support (100) according to claim 1, characterized in that: The first section (11) is a fixed part, and the second section (12) and the third section (13) are movable parts.

4. The leg support (100) according to claim 1, characterized in that: First sliding parts (111) extending along the expansion direction or the folding direction are respectively arranged on both sides of the width direction of the first section (11), and second sliding parts (131) extending along the expansion direction or the folding direction are respectively arranged on both sides of the width direction of the third section (13). When the multi-section expandable assembly (1) is expanded or folded, the first sliding part (111) and the second sliding part (131) slide relative to each other in a coordinated manner.

5. The leg support (100) according to claim 1, characterized in that: The first section (11) has a first plate-like member (112), the second section (12) has a second plate-like member (121), and the third section (13) has a third plate-like member (133). When the multi-section expandable component (1) is in a folded state, the third plate-like member (133) covers the first plate-like member (112) and the second plate-like member (121), and the occupied area of ​​the leg rest (100) is the occupied area of ​​the third plate-like member (133).

6. The leg support (100) according to claim 1, characterized in that: The scissor-type mechanism (22) comprises a first link group (221), a second link group (222) connected to the first link group (221), and a third link group (223) connected to the second link group (222); wherein the first link group (221) is fixedly connected to the first section (11), the second link group (222) is fixedly connected to the second section (12), and the third link group (223) is fixedly connected to the third section (13).

7. The leg support (100) according to claim 6, characterized in that: 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) includes 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 through a second hinge (2242), and are fixedly connected to the second section (12) through the second hinge (2242); the third connecting rod (2223) is connected to the first connecting rod (2211) through a movable third hinge (2243); and the fourth connecting rod (2224) is connected to the second connecting rod (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 by a fifth hinge (2245), and are fixedly connected to the third section (13) by the fifth hinge (2245), the fifth link (2235) is connected to the third link (2223) by a movable sixth hinge (2246), and the sixth link (2236) is connected to the fourth link (2224) by a movable seventh hinge (2247).

8. The leg support (100) according to claim 1, characterized in that: The second section (12) has a second slide groove (122), and the third section (13) has a third slide groove (134); the first section (11) and the second section (12) are connected by a first connecting member (141) arranged on the second slide groove (122), when the second section (12) moves relative to the first section (11) in the expansion direction or the folding direction of the leg rest, the first connecting member (141) and the second slide groove (122) slide relative to each other; the second section (12) and the third section (13) are connected by a second connecting member (142) arranged on the third slide groove (134), when the third section (13) moves relative to the second section (12) in the expansion direction or the folding direction of the leg rest, the second connecting member (142) and the third slide groove (134) slide relative to each other.

9. The leg support (100) according to claim 1, characterized in that: The maximum unfolding stroke of the leg support (100) is 200 mm-300 mm.

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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