WO2023185418A1 - 一种座椅腿部连杆机构、座椅支架及座椅 - Google Patents

一种座椅腿部连杆机构、座椅支架及座椅 Download PDF

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Publication number
WO2023185418A1
WO2023185418A1 PCT/CN2023/080797 CN2023080797W WO2023185418A1 WO 2023185418 A1 WO2023185418 A1 WO 2023185418A1 CN 2023080797 W CN2023080797 W CN 2023080797W WO 2023185418 A1 WO2023185418 A1 WO 2023185418A1
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WO
WIPO (PCT)
Prior art keywords
rod
footrest
seat
connecting rod
hinged
Prior art date
Application number
PCT/CN2023/080797
Other languages
English (en)
French (fr)
Inventor
李晓鸿
李元坤
宋刚
吕战征
Original Assignee
锐迈科技股份有限公司
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Application filed by 锐迈科技股份有限公司 filed Critical 锐迈科技股份有限公司
Publication of WO2023185418A1 publication Critical patent/WO2023185418A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/86—Parts or details for beds, sofas or couches only not fully covered in a single one of the sub-groups A47C17/02, A47C17/04, A47C17/38, A47C17/52, A47C17/64, or A47C17/84; Drawers in or under beds

Definitions

  • This application relates to the technical field of furniture manufacturing, specifically to a seat leg linkage mechanism, a seat bracket and a seat.
  • Functional sofa refers to a multi-functional sofa that can adjust the seat angle and headrest angle to adapt to the different needs of the body for seat angles at different times.
  • the sofa seat has a stretch function, and the seat legs use a telescopic linkage mechanism to expand and contract the legs and foot rest components.
  • the extendable range of the link mechanism is limited, or the sofa structure with extension function is to facilitate leg extension, and the seat height is generally high, which affects the comfort.
  • the existing leg linkage mechanism with a long extension distance of the footrest is generally provided with an extension auxiliary footrest in front of the main footrest.
  • the auxiliary footrest is extended and retracted from the bottom of the main footrest according to the relative Constant arc movement can easily cause the auxiliary footrest to wipe the floor.
  • the purpose of this application is to solve the problem in the prior art that the extension distance of the leg linkage mechanism is limited and the height of the sofa seat is low, and the leg linkage mechanism is prone to wiping the floor during the process of unfolding and retracting.
  • the present application provides a seat leg linkage mechanism, which includes a footrest and a telescopic link assembly.
  • the telescopic link assembly includes a first link group and a second link group;
  • the first connecting rod group includes a first linking rod, a first extension rod, a second extension rod and a first footrest connecting rod that are hinged in sequence, and the second link group includes a second linking rod that is hinged in sequence, a third The third extension rod, the fourth extension rod and the second foot rest connecting rod;
  • first linking rod and the second linking rod is used to be hinged with the seat mounting plate, and the middle parts of the first linking rod, the first extension rod and the second extension rod are respectively connected with the third
  • the extension rod, the fourth extension rod and the second footrest connection rod are cross-hinged, and the first footrest connection rod and the second footrest connection rod are cross-hinged.
  • the connecting rods are all hingedly connected to the footrest.
  • the footrest component includes a connection surface bent into an angular shape and a footrest installation surface, and both the first footrest connection rod and the second footrest connection rod are hingedly connected to the connection surface.
  • hinge points of the first footrest connecting rod and the second footrest connecting rod and the connecting surface are both located at an end of the connecting surface close to the seat mounting plate.
  • the vertical distance from the hinge point of the second footrest connection rod and the connection surface to the footrest installation surface is greater than the vertical distance from the hinge point of the first footrest connection rod and the connection surface to the footrest installation surface. Vertical distance from the foot mounting surface.
  • first extension rod and the fourth extension rod are cross-hinged, and a line connecting three connection points on the fourth extension rod is bent toward one side of the second extension rod.
  • the bending direction of the line connecting the three connection points of an extension rod is opposite to that of the fourth extension rod.
  • the distance L1 from the farthest end of the foot rest to the hinge point of the first linkage rod and the seat mounting plate is 450 -650mm.
  • the angle between the footrest mounting surface of the footrest component and the vertical plane is ⁇ 5°.
  • the distance L2 from the footrest mounting surface to the hinge point of the first linkage rod and the seat mounting plate is 100mm-140mm.
  • the maximum telescopic ratio of the leg linkage is 1:3.0-1:6.5.
  • first linkage rod is provided with a first limiter at a position close to the third extension rod, and the edge of the third extension rod is provided with an extension that matches the first limiter. limit surface and contraction limit surface.
  • a second limiter is provided at one end of the first footrest connecting rod close to the second extension rod.
  • a third limiting member is provided on the connecting surface.
  • This application also provides a seat bracket, which includes a support mechanism, a seat mounting plate, a backrest mechanism and the leg linkage mechanism.
  • the seat mounting plate is rotatably connected above the support mechanism, and the legs
  • the linkage mechanism and the backrest mechanism are respectively rotatably connected to both ends of the seat mounting plate;
  • the backrest mechanism includes a back mounting piece and a back linking rod.
  • One end of the back mounting piece is hinged to the seat mounting plate, and the other end of the back mounting piece is hinged to the back linking rod;
  • One end of the moving rod is hinged to the back mounting piece, and the other end of the back linking rod is hinged to the support mechanism;
  • the distance L3 between the farthest points of the foot rest and the back mounting part is 1000mm-1300mm.
  • the support mechanism includes a base, a first support member, a support connection member, an intermediate connection member, a support linkage member and a second support member;
  • the first support member and the second support member are respectively hinged at both ends of the base.
  • One end of the support connector is hinged with the first support member, and the other end of the support connector is installed with the seat.
  • the plate is hinged.
  • One end of the intermediate connector is hinged to the middle part of the support connector, and the other end is hinged to the support linkage.
  • the support linkage is hinged to the seat mounting plate and the second support member respectively.
  • This application also provides a seat, which includes a footrest and two seat brackets.
  • the two seat brackets are symmetrically arranged and spaced apart.
  • the footrest is fixed on the rest of the two seat brackets. on the foot pieces.
  • the leg linkage mechanism of this application forms a flexibly telescopic and foldable structure through cross-hinging to drive the telescopic movement of the footrest.
  • the first linkage rod is located at the second Above the linking rod, the first footrest connecting rod is located below the second footrest connecting rod, so that the telescopic link assembly forms an eight-link cross structure, which is simple in structure and highly reliable, and increases the expansion ratio of the telescopic link assembly. , increases the maximum stretch distance.
  • the lines connecting the connection points on the first extension rod and the fourth extension rod are all bent into angles, and the quadrilateral structure formed by cross-articulation of the connecting rods with bending angles further extends the distance.
  • Increase, and the folded height decreases, which increases the distance between the telescopic link assembly and the ground during movement, which is beneficial to avoid interference between the leg link mechanism and the base, or wiping the floor after installing the footrest.
  • Figure 1 is a schematic structural diagram of the leg linkage mechanism according to the embodiment of the present application.
  • Figure 2 is a schematic structural diagram of the extension bracket contracted to the extreme position according to the embodiment of the present application
  • Figure 3 is a structural schematic diagram of the seat bracket extended to the extreme position according to the embodiment of the present application.
  • Figure 4 is a schematic structural diagram of a seat according to an embodiment of the present application.
  • the reference signs are: 1-footrest, 2-first link group, 3-second link group, 21-first linkage rod, 22-first extension rod, 23-second extension rod , 24-The first footrest connecting rod, 31-The second linkage rod, 32-The third extension rod, 33-The fourth extension rod, 34-The second footrest connecting rod, 4-Seat mounting plate, 11- Connection surface, 12-footrest installation surface, 211-first limiter, 321-extension limiter surface, 322-retraction limiter surface, 241-second limiter, 13-third limiter, 5- Support mechanism, 51-base, 52-first support piece, 53-support connection piece, 54-middle connection piece, 55-support linkage piece, 56-second support piece, 6-backrest mechanism, 61-back mounting piece , 62-back linkage rod, 7-seat linkage component, 71-first connecting rod, 72-rotating connecting rod, 73-second connecting rod.
  • first and second are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the characteristics defined by “first” and “second” can be expressed or implicitly Implicitly includes one or more of these characteristics.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection, or Integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection can be a fixed connection or a detachable connection, or Integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • Embodiment 1 of the present application provides a seat leg linkage mechanism, which is used for seats with leg telescopic functions such as sofas, massage chairs, or leisure chairs.
  • the leg linkage mechanism of this embodiment includes a footrest 1 and a telescopic link assembly, and the telescopic link assembly includes a first link group 2 and a second link group 3;
  • the first link group 2 includes a first connecting link 21 , a first extension link 22 , a second extension link 23 and a first footrest connecting link 24 that are hinged in sequence.
  • the second link group 3 includes a second link that is hinged in sequence.
  • the moving rod 31, the third extension rod 32, the fourth extension rod 33 and the second foot rest connecting rod 34; one end of the first linking rod 21 and the second linking rod 31 are used to be hinged with the seat mounting plate 4,
  • the middle parts of the first linkage rod 21, the first extension rod 22 and the second extension rod 23 are cross-hinged with the third extension rod 32, the fourth extension rod 33 and the second footrest connecting rod 34 respectively.
  • the first footrest connecting rod 24 and the second footrest connecting rod 34 are both hinged with the footrest 1.
  • first linking rod 21 is located above the second linking rod 31, and the first footrest connecting rod 24 is located below the second footrest connecting rod 34, so that the telescopic link assembly can be composed of the first link group.
  • the eight links of the second link group 3 are cross-hinged to form an extendable link structure.
  • the first link group 2 and the second link group 3 intersect with each other to form four flexibly foldable quadrilateral structures, so that the telescopic link assembly can drive the footrest 1 away from or close to the seat mounting plate 4 .
  • the multiple foldable quadrilateral structures formed by the two link groups in this embodiment can increase the maximum extension distance of the telescopic link assembly.
  • the telescopic link assembly can also reduce the height of the telescopic link assembly after it is contracted, increasing the length of the telescopic link assembly during movement.
  • the distance from the ground helps avoid interference between the leg linkage and the base, or wiping the floor after installing the footrest.
  • the first extension rod 22 and the fourth extension rod 33 are connecting rods with a certain bending angle.
  • the first extension rod 22 and the fourth extension rod 33 are cross-hinged.
  • the connection lines of the three connection points on the fourth extension rod 33 are bent toward one side of the second extension rod 23.
  • the three connections of the first extension rod 22 are The bending direction of the line connecting the two connection points is opposite to that of the fourth extension rod 33 .
  • the three connection points of the first extension rod and the fourth extension rod are respectively the two end points and the middle hinge point of the first extension rod and the fourth extension rod.
  • the quadrilateral structure formed by the cross-hinged connecting rods with bending angles extends further, and the height after folding is reduced, and the height from the ground is increased after folding.
  • the footrest 1 includes a connecting surface 11 bent into an angular shape and a footrest mounting surface 12 . Both the first footrest connecting rod 24 and the second footrest connecting rod 34 are hingedly connected to the connecting surface 11 .
  • the connecting surface 11 and the footrest mounting surface 12 are integrally bent and formed. In this embodiment, the connecting surface 11 and the footrest mounting surface 12 form a right angle.
  • the footrest mounting surface 12 is used for fixed connection with the footrest.
  • the angular footrest 1 has a simple structure and high strength. It is connected to the telescopic link assembly through the side connection surface 11, which is beneficial to stable support of the footrest.
  • the hinge points of the first footrest connecting rod 24 and the second footrest connecting rod 34 and the connecting surface 11 are both located at one end of the connecting surface 11 close to the seat mounting plate 4 .
  • the vertical distance from the hinge point of the second footrest connection rod 34 to the connection surface 11 to the footrest installation surface 12 is greater than the vertical distance from the hinge point of the first footrest connection rod 24 to the connection surface 11 to the footrest installation surface 12 vertical distance.
  • the hinge positions of the first footrest connecting rod 24 and the second footrest connecting rod 34 and the connecting surface 11 are set so that the footrest member 1 can move relative to the first footrest connecting rod 24 and the second footrest connecting rod 34 Rotate forward, the extension distance increases, and the foot rest 1 rotates downward and folds.
  • the angle between the footrest mounting surface 12 of the footrest 1 and the vertical plane is ⁇ 5°.
  • it may be -5°, -4°, -3°, -2°, 0°, 4° or 5°.
  • the angle between the footrest installation surface 12 and the vertical plane is 0°, that is, the footrest installation surface 12 is perpendicular to the horizontal plane, and the footrest is positioned on the seat after contraction. In front of the frame, it does not occupy the space below the leg linkage mechanism after it is retracted, and increases the aesthetic appearance of the seat.
  • the distance L1 from the farthest end of the extension of the footrest 1 to the hinge point of the first linkage rod 21 and the seat mounting plate 4 is 450-650 mm.
  • it can be 450mm, 500mm, 550mm, 580mm, 600mm or 650mm.
  • the farthest end of the extension of the footrest 1 reaches the hinge between the first linkage rod 21 and the seat mounting plate 4
  • the distance L1 between the points is 545mm.
  • the distance L2 from the footrest mounting surface 12 to the hinge point of the first linkage rod 21 and the seat mounting plate 4 is 100 mm to 140 mm.
  • the maximum telescopic ratio of the leg linkage mechanism in this embodiment is 1:3.0-1:6.5.
  • the maximum telescopic ratio of the leg link mechanism can also be 1:3.0, 1:4.0, 1:4.8, 1:5, or 1 as the shape of the telescopic link assembly is optimized or the bending angle changes: 5.3, 1:5.5 or 1:6.5.
  • the ratio of the minimum contraction distance L2 and the maximum extension distance L1 of the leg linkage mechanism is 1:4.47.
  • the maximum expansion ratio of the leg linkage mechanism is increased, and the maximum extension distance is increased, thereby improving the comfort of leg support.
  • the first linking rod 21 is provided with a first limiting member 211 at a position close to the third extending rod 32 , and the edge of the third extending rod 32 is provided with an extending limiting surface that matches the first limiting member 211 321 and contraction limit surface 322.
  • a second limiter 241 is provided at one end of the first footrest connecting rod 24 close to the second extension rod 23. When the leg link mechanism contracts to the extreme position, the second limiter 241 conflicts with the second extension rod 23. .
  • a third limiter 13 is provided on the connecting surface 11. When the leg link mechanism contracts to the extreme position, the first footrest connecting rod 24 conflicts with the third limiter 13.
  • the extension limiting surface 321 on the edge of the third extension rod 32 conflicts with the first limiting member 211, and the first limiting member 211 is used to limit the leg linkage.
  • the maximum extension position of the rod mechanism to prevent it from being unable to retract or stuck due to excessive extension.
  • the contraction limiting surface 322 on the edge of the third extension rod 32 conflicts with the first limiting member 211 to limit the maximum contraction position of the third extension rod 32;
  • the extension rod 23 conflicts with the second limiting member 241 on the first footrest connecting rod 24 to limit the maximum retracted position of the first footrest connecting rod 24;
  • the third limiting member 13 is in conflict with each other and is used to limit the maximum retracted position of the footrest 1 .
  • multiple limiters are provided to limit the maximum retracted position of the leg link mechanism in sections, which is helpful to avoid the excessive folding of the quadrilateral structure formed in the leg link mechanism, causing the link mechanism to become stuck and telescopically stuck. problem, making the contraction and extension movements of the linkage mechanism more reliable and running smoothly.
  • This embodiment also provides a seat bracket, as shown in Figure 2-3, including a support mechanism 5, a seat mounting plate 4, a backrest mechanism 6 and a leg linkage mechanism.
  • the seat mounting plate 4 is rotatably connected to the support mechanism 5
  • the leg linkage mechanism and the backrest mechanism 6 are respectively rotatably connected to both ends of the seat mounting plate 4;
  • the backrest mechanism 6 includes a back mounting part 61 and a back linking rod 62, one end of the back mounting part 61 is connected to the seat mounting plate 4 Hinged, the other end of the back mounting part 61 is hinged with the back linking rod 62; one end of the back linking rod 62 is hinged with the back mounting part 61, and the other end of the back linking rod 62 is hinged with the support mechanism 5;
  • the backrest mounting part 61 in this embodiment has a T-shaped structure.
  • the distance between the farthest points of the footrest 1 and the back mounting part 61 is L3 is 1000mm-1300mm.
  • it can be 1000mm, 1050mm, 1100mm, 1200mm, 1250mm or 1300mm.
  • the distance L3 between the two furthest points between the footrest 1 and the back mounting member 61 is 1083 mm.
  • the support mechanism 5 includes a base 51, a first support member 52, a support connection member 53, an intermediate connection member 54, a support linkage member 55 and a second support member 56; the first support member 52 and the second support member 56 are respectively Hinged at both ends of the base 51, one end of the support connector 53 is hinged to the first support member 52, the other end of the support connector 53 is hinged to the seat mounting plate 4, one end of the middle connector 54 is hinged to the middle of the support connector 53, The other end is hinged with the support linkage 55 , and the support linkage 55 is hingedly connected with the seat mounting plate 4 and the second support 56 respectively.
  • the seat bracket also includes a seat linkage assembly 7.
  • the seat linkage assembly 7 includes a first connecting rod 71, a rotating link 72 and a second connecting rod 73.
  • One end of the first connecting rod 71 is connected to the first connecting rod 71 and the second connecting rod 73.
  • the middle part of the first support member 52 is hinged, and the other end is hinged with the rotating link 72.
  • the rotating link 72 is hinged with the second connecting rod 73.
  • the second connecting rod 73 is used to connect with the legs.
  • the second linkage rod 31 of the lever mechanism is hinged.
  • the seat linkage assembly 7 is used to link with the leg link mechanism and the support mechanism 5 during the position adjustment of the seat, in which the rotating link 72 rotates reciprocally around its connection point with the seat mounting plate 4 .
  • This embodiment also provides a seat, as shown in Figure 4, which includes a footrest and two seat brackets.
  • the two seat brackets are symmetrically arranged and spaced apart.
  • the footrest is fixed on the footrest parts 1 of the two seat brackets.
  • the seat also includes a backrest frame and armrest frames on both sides.
  • the armrest frame is fixedly connected to the seat mounting plate 4
  • the backrest frame is fixedly connected to the back mounting piece 61 of the backrest mechanism 6 .
  • a seat frame is installed on the seat mounting plate 4.
  • the seat frame, backrest frame and armrest frame are used to support the seat upholstery.
  • the seat of this embodiment can realize three postures: sitting, relaxing and lying down under the adjustment of the seat bracket. Position posture.
  • a driving mechanism is provided between the two seat brackets. The driving mechanism is used to drive the telescopic movement of the leg linkage mechanism, thereby driving the seat mounting plate 4, the support mechanism 5, the seat linkage assembly 7 and the backrest mechanism 6 to linkage.
  • This embodiment defines the stretching direction of the leg link mechanism as forward and the contraction direction as backward.
  • the leg linkage mechanism contracts to the extreme position, and the backrest mechanism 6 remains basically upright; when the seat frame is adjusted from the sitting position to the leisure position, the driving mechanism drives the leg linkage mechanism to tilt relative to the seat mounting plate 4 Stretch forward and upward, and simultaneously drive the seat mounting plate 4, support mechanism 5, seat linkage component 7 and backrest mechanism 6 to linkage; when adjusting from the leisure position to the lying position, the leg linkage mechanism continues to lift upward, and the backrest The mechanism 6 rotates and extends backward relative to the seat mounting plate 4. When extended to the extreme position, a lying position is achieved.
  • the leg linkage mechanism of the present application forms a flexibly telescopic and foldable structure through cross-hinging to drive the telescopic movement of the footrest.
  • the first linkage rod is located at the second linkage rod.
  • the first footrest connecting rod is located below the second footrest connecting rod, so that the telescopic link assembly forms an eight-link cross structure, which has a simple structure and high reliability, increases the expansion ratio of the telescopic link assembly, and increases the Maximum reach.
  • the first extension rod, the second extension rod and the fourth extension rod of the present application are connecting rods with a certain bending angle.
  • the quadrilateral structure formed by the cross-hinged connecting rods with the bending angle further increases the extension distance, and the folded
  • the reduced height increases the distance between the telescopic link assembly and the ground during movement, which helps avoid interference between the leg link mechanism and the base, or wiping the floor after installing the footrest.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Passenger Equipment (AREA)

Abstract

一种座椅腿部连杆机构，包括搁脚件(1)和伸缩连杆组件，伸缩连杆组件包括第一连杆组(2)和第二连杆组(3)；第一连杆组(2)和第二连杆组(3)都包括依次铰接的四个连杆件，其中，第一连动杆(21)和第二连动杆(31)的一端都用于与座部安装板(4)铰接，第一连动杆(21)、第一伸展杆(22)和第二伸展杆(23)的中部分别与第三伸展杆(32)、第四伸展杆(33)和第二搁脚连接杆(34)交叉铰接，第一搁脚连接杆(24)和第二搁脚连接杆(34)都与搁脚件(1)铰接，在伸缩连杆组件伸展到极限位置时，第一连动杆(21)位于第二连动杆(31)的上方，第一搁脚连接杆(24)位于第二搁脚连接杆(34)的下方。该座椅腿部连杆机构的最大伸展距离增加、伸缩比增加，且在运动过程中距离地面的高度更高，运动平顺度增加。

Description

一种座椅腿部连杆机构、座椅支架及座椅 技术领域
本申请涉及家具制造技术领域，具体涉及一种座椅腿部连杆机构、座椅支架及座椅。
背景技术
功能性沙发是指多功能沙发，可以调节座椅角度、靠头角度，适应不同时段身体对座椅角度不同的需求。具有伸展功能的沙发座椅，座椅腿部通过可伸缩的连杆机构实现腿部和搁脚组件的展开和收缩。一般地连杆机构能伸长的范围有限，或者具有伸展功能的沙发结构为方便腿部伸展，座高普遍较高，影响舒适度。现有的搁脚板伸展距离较远的腿部连杆机构一般是在主搁脚件的前方设置延伸副搁脚件，副搁脚板在伸出和收回的过程中从主搁脚件下方按照相对恒定的弧度运动，容易产生副搁脚板擦地的情况。
申请内容
本申请的目的在于解决现有技术中腿部连杆机构伸展距离有限，沙发座高较低的情况下，腿部连杆机构在展开和回收的过程中容易产生擦地现象的情况。
为了达到上述目的，本申请提供了一种座椅腿部连杆机构，包括搁脚件和伸缩连杆组件，所述伸缩连杆组件包括第一连杆组和第二连杆组；所述第一连杆组包括依次铰接的第一连动杆、第一伸展杆、第二伸展杆和第一搁脚连接杆，所述第二连杆组包括依次铰接的第二连动杆、第三伸展杆、第四伸展杆和第二搁脚连接杆；
所述第一连动杆和第二连动杆的一端都用于与座部安装板铰接，所述第一连动杆、第一伸展杆和第二伸展杆的中部分别与所述第三伸展杆、第四伸展杆和第二搁脚连接杆交叉铰接，所述第一搁脚连接杆和第二搁脚连 接杆都与所述搁脚件铰接，在所述伸缩连杆组件伸展到极限位置时，所述第一连动杆位于所述第二连动杆的上方，所述第一搁脚连接杆位于所述第二搁脚连接杆的下方。
进一步地，所述搁脚件包括弯折成角形的连接面和搁脚安装面，所述第一搁脚连接杆和第二搁脚连接杆都与所述连接面铰接。
进一步地，所述第一搁脚连接杆和第二搁脚连接杆与所述连接面的铰接点都设置于所述连接面靠近所述座部安装板的一端。
进一步地，所述第二搁脚连接杆与所述连接面的铰接点到所述搁脚安装面的垂直距离大于所述第一搁脚连接杆与所述连接面的铰接点到所述搁脚安装面的垂直距离。
进一步地，所述第一伸展杆与所述第四伸展杆交叉铰接，所述第四伸展杆上的三个连接点的连线向所述第二伸展杆的一侧弯折，所述第一伸展杆的三个连接点的连线的弯折方向与所述第四伸展杆的相反。
进一步地，当所述腿部连杆机构伸展到极限位置时，所述搁脚件伸展的最远端到所述第一连动杆与所述座部安装板的铰接点的距离L1为450-650mm。
进一步地，当所述腿部连杆机构收缩到极限位置时，所述搁脚件的搁脚安装面与铅垂面的夹角为±5°。
进一步地，当所述腿部连杆机构收缩到极限位置时，所述搁脚安装面到所述第一连动杆与所述座部安装板的铰接点的距离L2为100mm-140mm。
进一步地，所述腿部连杆机构的最大伸缩比为1：3.0-1：6.5。
进一步地，所述第一连动杆靠近所述第三伸展杆的位置上设置有第一限位件，所述第三伸展杆的边缘设置有与所述第一限位件相配合的伸展限位面和收缩限位面。
进一步地，所述第一搁脚连接杆靠近所述第二伸展杆的一端设置有第二限位件，当所述腿部连杆机构收缩到极限位置时，所述第二限位件与所述第二伸展杆相抵触。
进一步地，所述连接面上设置有第三限位件，当所述腿部连杆机构收 缩至极限位置时，所述第一搁脚连接杆与所述第三限位件相抵触。
本申请还提供一种座椅支架，包括支撑机构、座部安装板、靠背机构和所述的腿部连杆机构，所述座部安装板转动连接在所述支撑机构的上方，所述腿部连杆机构和所述靠背机构分别转动连接在所述座部安装板的两端；
所述靠背机构包括背部安装件和背部连动杆，所述背部安装件一端与所述座部安装板铰接，所述背部安装件的另一端与所述背部连动杆铰接；所述背部连动杆一端与所述背部安装件铰接，所述背部连动杆的另一端与所述支撑机构铰接；
当所述腿部连杆机构和所述靠背机构都伸展至极限位置时，所述搁脚件和所述背部安装件相距最远的点之间的距离L3为1000mm-1300mm。
进一步地，所述支撑机构包括底座、第一支撑件、支撑连接件、中间连接件、支撑连动件和第二支撑件；
所述第一支撑件和第二支撑件分别铰接在所述底座的两端，所述支撑连接件一端与所述第一支撑件铰接，所述支撑连接件的另一端与所述座部安装板铰接，所述中间连接件一端与所述支撑连接件的中部铰接，另一端与所述支撑连动件铰接，所述支撑连动件分别与所述座部安装板和第二支撑件铰接。
本申请还提供一种座椅，包括搁脚板和两个所述的座椅支架，两个所述座椅支架对称且相间隔设置，所述搁脚板固定在两个所述座椅支架的搁脚件上。
与现有技术相比，本申请具有如下有益效果：
(1)本申请腿部连杆机构通过交叉铰接形成可灵活伸缩折叠的结构带动搁脚件伸缩运动，在伸缩连杆组件带动搁脚件伸缩运动的过程中，第一连动杆位于第二连动杆的上方，第一搁脚连接杆位于第二搁脚连接杆的下方，使得伸缩连杆组件形成八连杆交叉结构，结构简单、可靠性高，增加了伸缩连杆组件的伸缩比，增加了最大伸展距离。
(2)本申请第一伸展杆和第四伸展杆上的连接点的连线都弯折成角，具有弯折角度的连接杆交叉铰接形成的四边形结构使得伸展的距离进一步 增加，且折叠后的高度减小，增加了伸缩连杆组件运动过程中与地面的距离，有利避免腿部连杆机构与底座产生干涉，或安装搁脚板后产生擦地的情况。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方式，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它附图。
图1为本申请实施例腿部连杆机构的结构示意图；
图2为本申请实施例伸展支架收缩到极限位置的结构示意图；
图3为本申请实施例座椅支架伸展到极限位置的结构示意图；
图4为本申请实施例一种座椅的结构示意图。
其中，附图标记为：1-搁脚件，2-第一连杆组，3-第二连杆组，21-第一连动杆，22-第一伸展杆，23-第二伸展杆，24-第一搁脚连接杆，31-第二连动杆，32-第三伸展杆，33-第四伸展杆，34-第二搁脚连接杆，4-座部安装板，11-连接面，12-搁脚安装面，211-第一限位件，321-伸展限位面，322-收缩限位面，241-第二限位件，13-第三限位件，5-支撑机构，51-底座，52-第一支撑件，53-支撑连接件，54-中间连接件，55-支撑连动件，56-第二支撑件，6-靠背机构，61-背部安装件，62-背部连动杆，7-座部联动组件，71-第一连转杆，72-转动连杆，73-第二连转杆。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本申请进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本申请的范围。
在本申请的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐 含地包括一个或者更多个该特征。
此外，在本申请中，除非另有明确的规定和限定，术语“安装”、“连接”等术语应做广义理解，例如，可以是线油孢子粉固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
实施例1
如图1所示，本申请实施例1提供了一种座椅腿部连杆机构，用于沙发、按摩椅或休闲椅等具有腿部伸缩功能的座椅。具体地，本实施例腿部连杆机构包括搁脚件1和伸缩连杆组件，伸缩连杆组件包括第一连杆组2和第二连杆组3；
第一连杆组2包括依次铰接的第一连动杆21、第一伸展杆22、第二伸展杆23和第一搁脚连接杆24，第二连杆组3包括依次铰接的第二连动杆31、第三伸展杆32、第四伸展杆33和第二搁脚连接杆34；第一连动杆21和第二连动杆31的一端都用于与座部安装板4铰接，第一连动杆21、第一伸展杆22和第二伸展杆23的中部分别与第三伸展杆32、第四伸展杆33和第二搁脚连接杆34交叉铰接，第一搁脚连接杆24和第二搁脚连接杆34都与搁脚件1铰接，在伸缩连杆组件伸展到极限位置时，第一连动杆21位于第二连动杆31的上方，第一搁脚连接杆24位于第二搁脚连接杆34的下方。
具体地，第一连动杆21位于第二连动杆31的上方，第一搁脚连接杆24位于第二搁脚连接杆34的下方，使得伸缩连杆组件可以为由第一连杆组2和第二连杆组3的八个连杆交叉铰接形成的可伸展连杆结构。第一连杆组2和第二连杆组3相互交叉形成四个可灵活折叠的四边形结构，使得伸缩连杆组件可带动搁脚件1远离或靠近座椅安装板4。本实施例两个连杆组形成的多个可折叠四边形结构可以增加伸缩连杆组件的最大伸展距离，同时也可以使得伸缩连杆组件收缩后的高度减小，增加伸缩连杆组件运动过程中与地面的距离，有利避免腿部连杆机构与底座产生干涉，或安装搁脚板后产生擦地的情况。
在本实施例中，第一伸展杆22和第四伸展杆33为具有一定弯折角度的连接杆。具体地，第一伸展杆22与第四伸展杆33交叉铰接，第四伸展杆33上的三个连接点的连线向第二伸展杆23的一侧弯折，第一伸展杆22的三个连接点的连线的弯折方向与第四伸展杆33的相反。第一伸展杆和第四伸展杆的三个连接点分别第一伸展杆和第四伸展杆的两端点和中间铰接点。具有弯折角度的连接杆交叉铰接形成的四边形结构伸展的距离进一步增加，且折叠后的高度减小，折叠后距地面高度增加。
具体地，搁脚件1包括弯折成角形的连接面11和搁脚安装面12，第一搁脚连接杆24和第二搁脚连接杆34都与连接面11铰接。连接面11和搁脚安装面12一体弯折成型。在本实施例中，连接面11与搁脚安装面12之间成直角。搁脚安装面12用于与搁脚板固定连接。角形搁脚件1结构简单、强度高，通过侧面的连接面11与伸缩连杆组件连接，有利于对搁脚板的稳定支撑。
具体地，第一搁脚连接杆24和第二搁脚连接杆34与连接面11的铰接点都设置于连接面11靠近座部安装板4的一端。在本实施例中，第二搁脚连接杆34与连接面11的铰接点到搁脚安装面12的垂直距离大于第一搁脚连接杆24与连接面11的铰接点到搁脚安装面12的垂直距离。具体地，第一搁脚连接杆24和第二搁脚连接杆34与连接面11的铰接位置的设置使得搁脚件1可以相对于第一搁脚连接杆24和第二搁脚连接杆34向前转动、伸展距离增加，且搁脚件1向下转动折叠。具体地，当腿部连杆机构收缩到极限位置时，搁脚件1的搁脚安装面12与铅垂面的夹角为±5°。优选地，可以为﹣5°、﹣4°、﹣3°、﹣2°、0°、4°或5°。在本实施例中，当腿部连杆机构收缩到极限位置时，搁脚安装面12与铅垂面的夹角为0°，即搁脚安装面12与水平面垂直，搁脚板收缩后位于座框前方，不占用腿部连杆机构收缩后下方空间，且增加座椅外观美观性。
具体地，当腿部连杆机构伸展到极限位置时，搁脚件1伸展的最远端到第一连动杆21与座部安装板4的铰接点的距离L1为450-650mm。优选地，可以为450mm、500mm、550mm、580mm、600mm或650mm。在本实施例中，搁脚件1伸展的最远端到第一连动杆21与座部安装板4的铰接 点的距离L1为545mm。当腿部连杆机构收缩到极限位置时，搁脚安装面12到第一连动杆21与座部安装板4的铰接点的距离L2为100mm-140mm。优选地，可以为100mm、110mm、120mm、130mm或140mm。在本实施例中，搁脚件1收缩后，搁脚安装面12到第一连动杆21与座部安装板4的铰接点的距离L2为122mm。优选地，本实施例腿部连杆机构的最大伸缩比为1：3.0-1：6.5。在一些实施例中，腿部连杆机构的最大伸缩比随伸缩连杆组件的零件形状优化或弯折角度改变还可以为1:3.0、1:4.0、1:4.8、1:5、1：5.3、1:5.5或1:6.5。在本实施例中，腿部连杆机构的最小收缩距离L2和最大伸展距离L1的比值为1:4.47。本实施例腿部连杆机构的最大伸缩比增加，最大伸展距离增加，提高了腿部支撑舒适性。
具体地，第一连动杆21靠近第三伸展杆32的位置上设置有第一限位件211，第三伸展杆32的边缘设置有与第一限位件211相配合的伸展限位面321和收缩限位面322。第一搁脚连接杆24靠近第二伸展杆23的一端设置有第二限位件241，当腿部连杆机构收缩到极限位置时，第二限位件241与第二伸展杆23相抵触。连接面11上设置有第三限位件13，当腿部连杆机构收缩至极限位置时，第一搁脚连接杆24与第三限位件13相抵触。本实施例当腿部连杆机构伸展到极限位置时，第三伸展杆32边缘上的伸展限位面321与第一限位件211相抵触，第一限位件211用于限制腿部连杆机构的最大伸展位置，防止其过度伸展造成无法收缩或卡顿。当腿部连杆机构收缩到极限位置时，第三伸展杆32边缘上的收缩限位面322与第一限位件211相抵触，用于限制第三伸展杆32的最大收缩位置；第二伸展杆23与第一搁脚连接杆24上的第二限位件241相抵触，用于限制第一搁脚连接杆24的最大收缩位置；第一搁脚连接杆24与搁脚件1上的第三限位件13相抵触，用于限制搁脚件1的最大收缩位置。本实施例设置多个限位件用于分段限制腿部连杆机构的最大收缩位置，有利于避免腿部连杆机构中形成的四边形结构过渡折叠导致连杆机构卡死和伸缩卡顿的问题，使得连杆机构的收缩和伸展运动更加可靠、运行顺畅。
本实施还提供一种座椅支架，如图2-3所示，包括支撑机构5、座部安装板4、靠背机构6和腿部连杆机构，座部安装板4转动连接在支撑机构5 的上方，腿部连杆机构和靠背机构6分别转动连接在座部安装板4的两端；靠背机构6包括背部安装件61和背部连动杆62，背部安装件61一端与座部安装板4铰接，背部安装件61的另一端与背部连动杆62铰接；背部连动杆62一端与背部安装件61铰接，背部连动杆62的另一端与支撑机构5铰接；
具体地，本实施例靠背安装件61为T字形结构，当腿部连杆机构和靠背机构6都伸展至极限位置时，搁脚件1和背部安装件61相距最远的点之间的距离L3为1000mm-1300mm。优选地，可以为1000mm、1050mm、1100mm、1200mm、1250mm或1300mm。在本实施例中，搁脚件1和背部安装件61之间相距最远的两点之间的距离L3为1083mm。
具体地，支撑机构5包括底座51、第一支撑件52、支撑连接件53、中间连接件54、支撑连动件55和第二支撑件56；第一支撑件52和第二支撑件56分别铰接在底座51的两端，支撑连接件53一端与第一支撑件52铰接，支撑连接件53的另一端与座部安装板4铰接，中间连接件54一端与支撑连接件53的中部铰接，另一端与支撑连动件55铰接，支撑连动件55分别与座部安装板4和第二支撑件56铰接。
具体地，座椅支架还包括座部联动组件7，座部联动组件7包括第一连转杆71、转动连杆72和第二连转杆73，所述第一连转杆71一端与所述第一支撑件52的中部铰接，另一端与转动连杆72铰接，所述转动连杆72与所述第二连转杆73铰接，所述第二连转杆73用于与腿部连杆机构的第二连动杆31铰接。座部联动组件7用于在座椅的位置调节过程中随腿部连杆机构和支撑机构5联动，其中转动连杆72绕其与座部安装板4的连接点往复转动。
本实施还提供一种座椅，如图4所示，包括搁脚板和两个座椅支架，两个座椅支架对称且相间隔设置，搁脚板固定在两个座椅支架的搁脚件1上。座椅还包括靠背架和两侧扶手架，扶手架与座部安装板4固定连接，靠背架与靠背机构6的背部安装件61固定连接。座部安装板4上安装有座框。座框、靠背架和扶手架用于承托座椅软包。
本实施例座椅在座椅支架的调节下可以实现坐姿、休闲姿和躺姿三种 位置姿态。两座椅支架之间设置有驱动机构，驱动机构用于驱动腿部连杆机构伸缩运动，从而带动座部安装板4、支撑机构5、座部联动组件7和靠背机构6联动。本实施例定义腿部连杆机构伸展运动的方向为前，收缩的方向为后。在坐姿状态，腿部连杆机构收缩到极限位置，靠背机构6基本保持直立；当座椅支架从坐姿调节到休闲姿时，驱动机构驱动腿部连杆机构相对于座部安装板4倾斜向前和向上伸展，同时带动座部安装板4、支撑机构5、座部联动组件7和靠背机构6联动；当从休闲姿调节到躺姿状态时，腿部连杆机构继续向上抬高，靠背机构6相对于座部安装板4向后转动伸展，当伸展到极限位置时，实现躺姿状态。
本申请腿部连杆机构通过交叉铰接形成可灵活伸缩折叠的结构带动搁脚件伸缩运动，在伸缩连杆组件带动搁脚件伸缩运动的过程中，第一连动杆位于第二连动杆的上方，第一搁脚连接杆位于第二搁脚连接杆的下方，使得伸缩连杆组件形成八连杆交叉结构，结构简单、可靠性高，增加了伸缩连杆组件的伸缩比，增加了最大伸展距离。
本申请第一伸展杆、第二伸展杆和第四伸展杆为具有一定弯折角度的连接杆，具有弯折角度的连接杆交叉铰接形成的四边形结构使得伸展的距离进一步增加，且折叠后的高度减小，增加了伸缩连杆组件运动过程中与地面的距离，有利避免腿部连杆机构与底座产生干涉，或安装搁脚板后产生擦地的情况。
应当理解的是，本申请的上述具体实施方式仅仅用于示例性说明或解释本申请的原理，而不构成对本申请的限制。因此，在不偏离本申请的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种座椅腿部连杆机构，其特征在于，包括搁脚件(1)和伸缩连杆组件，所述伸缩连杆组件包括第一连杆组(2)和第二连杆组(3)；所述第一连杆组(2)包括依次铰接的第一连动杆(21)、第一伸展杆(22)、第二伸展杆(23)和第一搁脚连接杆(24)，所述第二连杆组(3)包括依次铰接的第二连动杆(31)、第三伸展杆(32)、第四伸展杆(33)和第二搁脚连接杆(34)；
    所述第一连动杆(21)和第二连动杆(31)的一端都用于与座部安装板(4)铰接，所述第一连动杆(21)、第一伸展杆(22)和第二伸展杆(23)的中部分别与所述第三伸展杆(32)、第四伸展杆(33)和第二搁脚连接杆(34)交叉铰接，所述第一搁脚连接杆(24)和第二搁脚连接杆(34)都与所述搁脚件(1)铰接，在所述伸缩连杆组件伸展到极限位置时，所述第一连动杆(21)位于所述第二连动杆(31)的上方，所述第一搁脚连接杆(24)位于所述第二搁脚连接杆(34)的下方。
  2. 根据权利要求1所述的一种座椅腿部连杆机构，其特征在于，所述搁脚件(1)包括弯折成角形的连接面(11)和搁脚安装面(12)，所述第一搁脚连接杆(24)和第二搁脚连接杆(34)都与所述连接面(11)铰接。
  3. 根据权利要求2所述的一种座椅腿部连杆机构，其特征在于，所述第一搁脚连接杆(24)和第二搁脚连接杆(34)与所述连接面(11)的铰接点都设置于所述连接面(11)靠近所述座部安装板(4)的一端。
  4. 根据权利要求3所述的一种座椅腿部连杆机构，其特征在于，所述第二搁脚连接杆(34)与所述连接面(11)的铰接点到所述搁脚安装面(12)的垂直距离大于所述第一搁脚连接杆(24)与所述连接面(11)的铰接点到所述搁脚安装面(12)的垂直距离。
  5. 根据权利要求1所述的一种座椅腿部连杆机构，其特征在于，所述第一伸展杆(22)与所述第四伸展杆(33)交叉铰接，所述第四伸展杆(33)上的三个连接点的连线向所述第二伸展杆(23)的一侧弯折，所述第一伸展杆(22)的三个连接点的连线的弯折方向与所述第四伸展杆(33)的相反。
  6. 根据权利要求1所述的一种座椅腿部连杆机构，其特征在于，当所述腿部连杆机构伸展到极限位置时，所述搁脚件(1)伸展的最远端到所述第一连动杆(21)与所述座部安装板(4)的铰接点的距离L1为450-650mm。
  7. 根据权利要求6所述的一种座椅腿部连杆机构，其特征在于，当所述腿部连杆机构收缩到极限位置时，所述搁脚件(1)的搁脚安装面(12)与铅垂面的夹角为±5°。
  8. 根据权利要求7所述的一种座椅腿部连杆机构，其特征在于，当所述腿部连杆机构收缩到极限位置时，所述搁脚安装面(12)到所述第一连动杆(21)与所述座部安装板(4)的铰接点的距离L2为100mm-140mm。
  9. 根据权利要求8所述的一种座椅腿部连杆机构，其特征在于，所述腿部连杆机构的最大伸缩比为1：3.0-1：6.5。
  10. 根据权利要求1所述的一种座椅腿部连杆机构，其特征在于，所述第一连动杆(21)靠近所述第三伸展杆(32)的位置上设置有第一限位件(211)，所述第三伸展杆(32)的边缘设置有与所述第一限位件(211)相配合的伸展限位面(321)和收缩限位面(322)。
  11. 根据权利要求10所述的一种座椅腿部连杆机构，其特征在于，所述第一搁脚连接杆(24)靠近所述第二伸展杆(23)的一端设置有第二限位件(241)，当所述腿部连杆机构收缩到极限位置时，所述第二限位件(241)与所述第二伸展杆(23)相抵触。
  12. 根据权利要求2所述的一种座椅腿部连杆机构，其特征在于，所述连接面(11)上设置有第三限位件(13)，当所述腿部连杆机构收缩至极限位置时，所述第一搁脚连接杆(24)与所述第三限位件(13)相抵触。
  13. 一种座椅支架，其特征在于，包括支撑机构(5)、座部安装板(4)、靠背机构(6)和如权利要求1-12任一项所述的腿部连杆机构，所述座部安装板(4)转动连接在所述支撑机构(5)的上方，所述腿部连杆机构和所述靠背机构(6)分别转动连接在所述座部安装板(4)的两端；
    所述靠背机构(6)包括背部安装件(61)和背部连动杆(62)，所述背部安装件(61)一端与所述座部安装板(4)铰接，所述背部安装件(61)的另一端与所述背部连动杆(62)铰接；所述背部连动杆(62)一端与所 述背部安装件(61)铰接，所述背部连动杆(62)的另一端与所述支撑机构(5)铰接；
    当所述腿部连杆机构和所述靠背机构(6)都伸展至极限位置时，所述搁脚件(1)和所述背部安装件(61)相距最远的点之间的距离L3为1000mm-1300mm。
  14. 根据权利要求13所述的一种座椅支架，其特征在于，所述支撑机构(5)包括底座(51)、第一支撑件(52)、支撑连接件(53)、中间连接件(54)、支撑连动件(55)和第二支撑件(56)；
    所述第一支撑件(52)和第二支撑件(56)分别铰接在所述底座(51)的两端，所述支撑连接件(53)一端与所述第一支撑件(52)铰接，所述支撑连接件(53)的另一端与所述座部安装板(4)铰接，所述中间连接件(54)一端与所述支撑连接件(53)的中部铰接，另一端与所述支撑连动件(55)铰接，所述支撑连动件(55)分别与所述座部安装板(4)和第二支撑件(56)铰接。
  15. 一种座椅，其特征在于，包括搁脚板和两个如权利要求13或14任一项所述的座椅支架，两个所述座椅支架对称且相间隔设置，所述搁脚板固定在两个所述座椅支架的搁脚件(1)上。
PCT/CN2023/080797 2022-03-29 2023-03-10 一种座椅腿部连杆机构、座椅支架及座椅 WO2023185418A1 (zh)

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