WO2024060958A1 - 一种沙发支架及座椅单元 - Google Patents

一种沙发支架及座椅单元 Download PDF

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Publication number
WO2024060958A1
WO2024060958A1 PCT/CN2023/116152 CN2023116152W WO2024060958A1 WO 2024060958 A1 WO2024060958 A1 WO 2024060958A1 CN 2023116152 W CN2023116152 W CN 2023116152W WO 2024060958 A1 WO2024060958 A1 WO 2024060958A1
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WO
WIPO (PCT)
Prior art keywords
hinge point
link
hinged
connecting piece
extension
Prior art date
Application number
PCT/CN2023/116152
Other languages
English (en)
French (fr)
Inventor
蔡赛军
李晓鸿
吴启明
Original Assignee
锐迈科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 WO2024060958A1 publication Critical patent/WO2024060958A1/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
    • A47C17/86—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
    • 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

Definitions

  • the present application relates to the technical field of sofa supports, and in particular to a sofa support and a seat unit.
  • Functional sofa refers to a sofa with multiple functions. Through special structural design, the sofa can be deformed to meet the user's needs of sitting, lying down or massaging.
  • the support of a functional sofa generally includes a leg extension component and a mounting bracket.
  • Most of the existing leg extension assemblies are flat four-bar mechanisms, which have a simple structure and are easy to assemble.
  • the gap between a set of opposite sides of the structure can easily pinch the user during posture adjustment; and it can provide structural support for the user.
  • the area is limited, and blindly increasing the support surface will cause the leg extension component to increase in size. After being stored, the space between it and the ground will become smaller, making it difficult for users to clean the floor in this area.
  • the first purpose of this application is to provide a sofa support whose second extension link can block the first extension link to prevent pinching of the user during use.
  • Another object of the present application is to provide a seat unit that can provide support for the user's feet or lower legs and is easy to use.
  • a sofa support includes a leg extension assembly and a mounting frame that are connected to each other.
  • the leg extension assembly includes a first drive link and a support link that are hingedly connected to the mounting frame. It also includes a first extension link, a third Two extension links, a main footrest link, an auxiliary footrest link and a second drive link, wherein: one end of the first extension link is hinged to the free end of the support link, and its hinge point is the third A hinge point, the other end of the first extension link is hinged to the second drive link, and the first extension link is hinged to the main footrest link; one end of the auxiliary footrest link is hinged to The free end of the main footrest connecting rod and the second driving link is hinged to the auxiliary footrest connecting rod; one end of the second extension link is hinged to the main footrest connecting rod, and its hinge point As a second hinge point, the other end of the second extension link is hinged to the free end of the first drive link; the second extension link and the support link are hinged between their two
  • its hinge point is the third hinge point; when the first driving link rotates around its hinge point with the mounting frame, the first drive link is defined
  • the rod section of the extension link between the second hinge point and the third hinge point is the main link section, when axially facing along the rotation axis of the first drive link from the outside of the second extension link When viewing the first extended link, the upper edge of the main rod section can be blocked by the second extended link.
  • the hinge point of the first extension link and the main footrest link is a fifth hinge point
  • the hinge point of the auxiliary footrest link and the main footrest link is The fourth hinge point; the second hinge point, the fifth hinge point and the fourth hinge point are not collinear.
  • the second extension link is provided with a limiting protrusion;
  • the support link is provided with a storage notch and an extension notch that cooperate with the limiting protrusion; when the first driving When the connecting rod rotates, the storage notch is used to limit the limiting protrusion so that the leg extension assembly is in a stowed state, and the extension notch is used to limit the limiting protrusion so that the leg extension assembly is in a stowed state.
  • the extension component is in an extended state.
  • the main footrest link is provided with a first assembly surface
  • the auxiliary footrest link is provided with a second assembly surface; when the leg extension assembly is in the stowed state , the first assembly surface and the second assembly surface form a first included angle; when the leg extension assembly is in the extended state, the first assembly surface and the second assembly surface form a second included angle. angle.
  • the hinge point of the first drive link and the second extension link is a sixth hinge point, and the limiting protrusions are distributed between the third hinge point and the sixth hinge point. Between the hinge points; the storage notch and the extension notch are both arranged toward the limiting protrusion.
  • the second extended link includes a lower working section and an upper working section connected to each other, the lower working section is connected to the first drive link, and the upper working section is connected to the Main footrest connecting rod; the connection between the lower working section and the upper working section is equipped with a first transition fillet, and the first transition fillet is distributed on the side close to the first hinge point; the third transition fillet is distributed on the side close to the first hinge point; A transition fillet protrudes toward the first hinge point.
  • the third hinge point and the sixth hinge point are both arranged in the lower working section.
  • the first extended link includes a front working section, a middle working section and a rear working section connected in sequence, wherein: the rear working section is connected to the support link; the rear working section A second transition fillet is arranged at the connection point with the middle working section, and the second transition fillet protrudes away from the first hinge point.
  • the front working section includes a working section and a transition section connected to each other, the transition section is connected to the middle working section, and the working section is connected to the second drive link;
  • the working part is parallel to the middle working section and not coplanar.
  • the hinge point between the support link and the mounting frame is the seventh hinge point; the rotation axis when the first driving link rotates around its hinge point with the mounting frame is defined as the reference axis, perpendicular to the datum axis
  • the plane is the datum plane; the distance between the projection point of the first hinge point in the datum plane and the projection point of the seventh hinge point in the datum plane is 200-240mm.
  • the mounting frame includes a seat frame and an adjustment component for adjusting the seat frame, wherein: the adjustment component includes a relatively arranged fixed base plate, a rotation drive plate and an adjustment mechanism, and the rotation drive plate
  • the rotation drive plate is adjustably connected to the seat frame through at least two first connectors, the first end of the first connector being hinged to the seat frame. , the other end is hinged to the rotation drive plate.
  • the hinge point of the first connecting member and the seat frame is the eighth hinge point
  • the hinge point of the first connecting member and the rotation drive plate is the ninth hinge point
  • the distance between the projection point of the eighth hinge point in the datum plane and the projection point of the ninth hinge point on the same first connecting piece as the eighth hinge point in the datum plane is 110-150mm.
  • the adjustment mechanism includes a second connecting piece, a third connecting piece, a fourth connecting piece, a fifth connecting piece, a sixth connecting piece, a seventh connecting piece and an eighth connecting piece, wherein:
  • the second connecting piece is provided with hinge hole one and hinge hole two.
  • the second connecting piece is hinged to the rotation drive plate through hinge hole one.
  • the second connecting piece is hinged to the third hinge hole through hinge hole two.
  • the second hinge hole is between the two ends of the third connector; the first end of the third connector is hinged to the fixed base plate, and the second end is hinged to the fourth connection the first end of the fourth connecting piece; the second end of the fourth connecting piece is hinged to the fifth connecting piece, and the hinge point of the two is between the two ends of the fifth connecting piece; the fifth connecting piece The first end of the connecting piece is hinged to the second connecting piece, and the hinge point of the two is between the hinge hole one and the hinge hole two. The second end of the fifth connecting piece is hinged to the hinge hole.
  • the first end of the sixth connecting piece; the second end of the sixth connecting piece is hinged to the fixed base plate; the first end of the seventh connecting piece is hinged to the sixth connecting piece, and the two are hinged
  • the point is between the two ends of the sixth connection piece, the second end of the seventh connection piece is hinged to the rotation drive plate; the first end of the eighth connection piece is hinged to the rotation drive plate plate with a second end hinged to the first drive link.
  • the seat frame is provided with a backrest assembly.
  • the backrest assembly includes a backrest connection block, a backrest limiter block, a backrest limiter rod, and a ninth connector.
  • the backrest connection block is connected to the backrest.
  • the limiting block is hinged.
  • One end of the ninth connecting piece is hinged to between the two end points of the backrest connecting block, and the other end is hinged to the backrest limiting rod.
  • a limiting post is provided on the backrest limiting rod.
  • the backrest limit block is provided with a limit surface that matches the limit column; the backrest limit block is fixedly connected to the seat frame.
  • the backrest assembly further includes a tenth connecting piece, the first end of the tenth connecting piece is hinged to the fixed base plate, and the hinge point of the two is the tenth hinge point; the tenth connecting piece has a second end hinged to the backrest limit One end of the rod is away from the backrest connecting block, and the hinge point of the two is the eleventh hinge point; the projection point of the tenth hinge point in the datum plane and the projection point of the eleventh hinge point in the datum plane The distance between projection points is 65-100mm.
  • a seating unit includes the above-mentioned sofa support.
  • the rod section (main rod section) of the first extension link between the second hinge point and the third hinge point is ) is coincident with the second extension link in the axial direction of the rotation axis of the first drive link, that is, when viewed from the outside of the second extension link toward the first extension link in the axial direction of the rotation axis of the first drive link , the upper edge of the main rod section can be blocked by the second extension link; thus, the gap between the first extension link and the second extension link can avoid pinching the user during the posture adjustment process of the leg extension assembly.
  • the second extension link plays the role of structural support and connection on the one hand, and on the other hand plays the role of safety protection. There is no need to add specific anti-pinch components, which ensures safety and simplifies the installation process.
  • the structure of the sofa support at the same time, by setting the second driving link and the auxiliary footrest link, the auxiliary footrest link can perform a certain degree of functionality on the main footrest link when providing support to the user.
  • the auxiliary footrest connecting rod and the main footrest connecting rod also provide support to the user.
  • the auxiliary footrest connecting rod here can be stored, has a compact structure and takes up little space.
  • Figure 1 is a schematic three-dimensional structural diagram of a leg extension assembly provided by an embodiment of the present application
  • Figure 2 is a schematic front structural view of the leg extension component provided by the embodiment of the present application in an extended state
  • Figure 3 is a schematic front structural view of the leg extension assembly provided by the embodiment of the present application in a stowed state
  • Figure 4 is a schematic three-dimensional structural diagram of the second extension link provided by the embodiment of the present application.
  • Figure 5 is a schematic three-dimensional structural diagram of the first extension link provided by the embodiment of the present application.
  • Figure 6 is a schematic top structural view of the first extension link provided by the embodiment of the present application.
  • Figure 7 is a schematic three-dimensional structural diagram of a support link provided by an embodiment of the present application.
  • Figure 8 is a schematic three-dimensional structural diagram of the sofa support provided by the embodiment of the present application in a stowed state
  • Figure 9 is a schematic three-dimensional structural diagram of the sofa support provided by the embodiment of the present application in a semi-extended state
  • Figure 10 is a schematic three-dimensional structural diagram of the sofa support provided by the embodiment of the present application in an extended state
  • Figure 11 is a schematic front structural view of the sofa support provided by the embodiment of the present application in an extended state
  • FIG12 is a rear view structural schematic diagram of a sofa support provided in an embodiment of the present application in an extended state
  • FIG13 is a front view of the first connecting member provided in an embodiment of the present application.
  • Figure 14 is a schematic front structural view of the tenth connector provided by the embodiment of the present application.
  • Figure 15 is a schematic three-dimensional structural diagram of the sofa support provided by the embodiment of the present application after being assembled with the first driving member;
  • Figure 16 is a schematic structural diagram of the front view relative to the ground after the sofa bracket provided by the embodiment of the present application is assembled to the seat unit;
  • Figure 17 is a schematic front structural view of the sofa support provided by the embodiment of the present application in a lying position.
  • Icon 1. Leg extension assembly; 11. First drive link; 12. Support link; 121. Extension notch; 122. Storage notch; 123. Hinge hole three; 124. Hinge hole four; 13. Second extension Connecting rod; 131. Upper working section; 132. Lower working section; 133. First transition fillet; 14. Main footrest connecting rod; 141. First assembly surface; 15. First extension connecting rod; 151. Rear working Section; 152. Middle working section; 153. Front working section; 1531. Transition part; 1532. Working part; 154. Second transition fillet; 16. Second driving link; 17. Auxiliary footrest link; 171. The second assembly surface; 18. Limiting protrusion; 191. The first hinge point; 192. The sixth hinge point; 193.
  • a sofa support includes a leg extension assembly 1 and a mounting frame 2 connected to each other.
  • the leg extension assembly 1 includes a first driving link 11 and a support link 12 hinged to the mounting frame 2.
  • the other end of the first extension link 15 is hinged to the second drive link 16, and the first extension link 15 is hinged to the main footrest link 14.
  • One end of the auxiliary footrest link 17 is hinged to the main footrest link 14, and the free end of the second driving link 16 is hinged to the auxiliary footrest link 17; one end of the second extension link 13 is hinged to the main footrest link.
  • the hinge point of the rod 14 is the second hinge point 194, and the other end of the second extension link 13 is hinged to the free end of the first drive link 11; the second extension link 13 and the support link 12 are connected between the two
  • the two end points are hinged, and the hinge point is the third hinge point 193; when the first driving link 11 rotates around its hinge point with the mounting bracket 2, the first extension link 15 is defined at the second hinge point 194 and
  • the rod section between the third hinge points 193 is the main rod section.
  • the mounting bracket 2 in this embodiment can be any of the prior art mounting brackets 2 used for working sofas, and can be combined with the leg extension assembly 1 to form a sofa bracket.
  • the hinge point of the first extension link 15 and the main footrest link 14 is the fifth hinge point 196
  • the hinge point of the auxiliary footrest link 17 and the main footrest link 14 is the fourth hinge point 195.
  • the second hinge point 194, the fifth hinge point 196 and the fourth hinge point 195 are not collinear.
  • the hinge point of the first driving link 11 and the second extension link 13 is the sixth hinge point 192 .
  • this planar four-bar mechanism can adjust the attitude from Figure 2 to Figure 3 when the first driving link 11 exerts an external force on the second extension link 13, and is more specifically reflected in Figures 8 to 3 Figure 10 (from the stowed state to the extended state) or Figure 10 to Figure 8 (from the extended state to the stowed state), thereby realizing the posture adjustment of the functional sofa and making it convenient for users to use.
  • the leg extension assembly 1 is in the stowed state.
  • the main footrest link 14 can provide support for the user's feet or legs. The lower legs provide upward support to relieve the fatigue of the user's lower limbs.
  • the first extension link 15 and the second extension link 13 are one set of opposite sides of the first planar four-bar mechanism, and the first extension link 15 is located inside the second extension link 13.
  • the first extension link is between the second hinge point 194 and the third hinge point 193
  • the upper edge of the partial rod section coincides with the second extension link 13 in the axial direction of the rotation axis of the first drive link 11 , that is, on the outside of the second extension link 13 along the axial direction of the rotation axis of the first drive link 11 .
  • the upper edge of the main rod section can be blocked by the second extended link 13 .
  • This can prevent the user from being pinched by the gap between the first extension link 15 and the second extension link 13 during the posture adjustment process of the leg extension assembly 1 .
  • the second extension link 13 here serves as a component of the leg extension assembly 1. On the one hand, it plays the role of structural support and connection, and on the other hand, it plays the role of safety protection. There is no need to add specific anti-pinch components, ensuring safety. At the same time, the structure of the sofa bracket is simplified.
  • the main footrest link 14, the second drive link 16, the first extension link 15 and the auxiliary footrest link 17 constitute a second plane four-bar mechanism, and the second plane four-bar mechanism is connected in series with the first plane four-bar mechanism.
  • the leg extension assembly 1 can provide a larger support area for the user's feet or calves in the extended state, and the support effect is good, and the functional sofa using the sofa bracket can adapt to users of a larger body range, that is, the user coverage is wider.
  • the second extended link 13 includes a lower working section 132 and an upper working section 131 connected to each other.
  • the lower working section 132 is connected to the first driving link 11, and the upper working section 132 is connected to the first driving link 11.
  • Section 131 is connected to the main footrest link 14;
  • a first transition fillet 133 is configured at the connection between the lower working section 132 and the upper working section 131, and the first transition fillet 133 is distributed on the side close to the first hinge point 191;
  • a transition fillet 133 is protruding toward the first hinge point 191 .
  • the upper working section 131 and the lower working section 132 are integrally formed, and the third hinge point 193 and the sixth hinge point 192 are both provided on the lower working section 132 .
  • the structural center of the upper working section 131 is always higher than the structural center of the lower working section 132, so that whether the sofa stand is in the stowed state or the extended state, the leg extension assembly 1.
  • This structural design can, on the one hand, enable the main footrest link 14 to lift the user's feet or calves as high as possible when the sofa support is in an extended state.
  • leg extension component 1 promote blood circulation in the user's lower limbs to achieve relaxation; on the other hand, when the sofa stand is in the stowed state, the front end of the leg extension component 1 is tilted up to make the space between it and the ground large, making it convenient for the user to perform operations on the bottom of the leg extension component 1 Sanitary cleaning.
  • the first transition fillet 133 is used to block part of the structure of the first hinge point 191.
  • the first hinge point 191 makes a circular motion around the third hinge point 193.
  • the structural design of the first transition fillet 133 is basically consistent with the movement trajectory of the first hinge point 191.
  • the first hinge point 191 can be blocked during its movement, and the effect of the width of the second extension link 13 can be reduced as much as possible on the basis of blocking the first extension link 15, thereby saving the second extension link. 13
  • the volume of the leg extension component 1 can be reduced, and the height between the leg extension component 1 and the ground can be increased to facilitate cleaning by the user.
  • the second extension link 13 is provided with a limiting protrusion 18;
  • the support link 12 is provided with a storage notch 122 and an extension notch 121 that cooperate with the limiting protrusion 18;
  • the storage notch 122 is used to cooperate with the limiting protrusion 18 so that the leg extension assembly 1 is in the stowed state, and the extension notch 121 is used to cooperate with the limiting protrusion 18 so that the leg extension assembly 1 is in the extended state.
  • the extension notch 121 and the storage notch 122 here are used to cooperate with the limiting protrusion 18.
  • the first driving link 11 During the movement of the rotationally driven leg extension assembly 1, the support link 12 and the second extension link 13 rotate relative to each other around the third hinge point 193.
  • the support link 12 rotates relative to the second extension link 13 around the third hinge point 193
  • the extension notch 121 is rotated clockwise until it snaps into the limiting protrusion 18
  • the extension component remains in an extended state
  • the support link 12 is rotated counterclockwise around the third hinge point 193 relative to the second extension link 13 to the storage notch 122
  • the extension component remains in the stowed state.
  • the limiting protrusion 18 is distributed between the third hinge point 193 and the sixth hinge point 192; the receiving notch 122 and the extending notch 121 are both disposed toward the limiting protrusion 18.
  • the main footrest link 14 is provided with a first assembly surface 141
  • the auxiliary footrest link 17 is provided with a second assembly surface 171; when the leg extension assembly 1 is in the stowed state, The first assembly surface 141 and the second assembly surface 171 form a first included angle ⁇ , and the first included angle ⁇ is 85°-95°; when the leg extension assembly 1 is in the extended state, the first assembly surface 141 and the second assembly surface 171 are in an extended state.
  • the two assembly surfaces 171 form a second included angle ⁇ , and the second included angle ⁇ is 0°-10°.
  • the first included angle ⁇ is 90°; when the leg extension component 1 is in the extended state, the second included angle ⁇ is 0°.
  • the first assembly surface 141 is substantially perpendicular to the ground, and the second assembly surface 171 is substantially parallel to the ground. This arrangement makes the leg extension assembly 1 compact in structure and takes up little space.
  • the leg extension assembly 1 that is, the sofa support
  • the first assembly surface 141 and the second assembly surface 171 are substantially parallel and facing the same side, so that the second assembly surface 171 is at Functionally, the support area of the first assembly surface 141 can be well expanded, and the support area of the leg extension assembly 1 can be increased, which is beneficial to improving the comfort of the leg extension assembly 1 .
  • the first extension link 15 includes a front working section 153, a middle working section 152 and a rear working section 151 connected in sequence, wherein the rear working section 151 is connected to the support link 12;
  • a second transition fillet 154 is configured at the connection between the rear working section 151 and the middle working section 152, and the second transition fillet 154 protrudes away from the first hinge point 191.
  • the front working section 153, the middle working section 152 and the rear working section 151 are integrally formed.
  • the rear working section 151 and the middle working section 152 here are arranged at an included angle, so that the function of the first extending link 15 can be maintained between the first hinge point 191 and the second hinge point 194 without changing the function of the first extension link 15 .
  • the upper edge is closer to the upper edge of the second extension link 13, and the structure is compact, which facilitates the second extension link 13 to block the first extension link 15 and prevents the lower edge of the second extension link 13 from interfacing with the first extension link 13.
  • a gap is formed between the upper edges of 15, which can prevent the user from being pinched and has high safety.
  • the second transition fillet 154 formed at the connection between the rear working section 151 and the middle working section 152 can reduce stress concentration at the connection and achieve high structural strength.
  • the front working section 153 includes a working section 1532 and a transition section 1531 connected to each other.
  • the transition section 1531 is connected to the middle working section 152
  • the working section 1532 is connected to the second driving link 16 ;
  • the working section 1532 and the middle working section 152 are parallel and not coplanar.
  • the structural design in which the working part 1532 and the middle working section 152 are parallel and non-coplanar facilitates the hinged connection between the working part 1532 and the second driving link 16 .
  • the hinge point between the support link 12 and the mounting frame 2 is the seventh hinge point 197
  • the axis of rotation of the first drive link 11 around the hinge point with the mounting frame 2 is defined as the reference axis
  • the plane perpendicular to the reference axis is the reference plane
  • D1 215.53mm.
  • the support link 12 is respectively provided with a hinge hole three 123 and a hinge hole four 124, wherein the seventh hinge point 197 is located on the central axis of the hinge hole three 123, the first hinge point 191 is located on the central axis of the hinge hole four 124, and the central axis of the hinge hole three 123 and the central axis of the hinge hole four 124 are both parallel to the reference axis.
  • D1 is the distance between the central axis of the hinge hole three 123 and the central axis of the hinge hole four 124.
  • the length limit D1 here ensures that the leg extension assembly 1 is opened to a certain length in the extended state, while also ensuring that it does not interfere with the ground during the storage process.
  • the installation frame 2 includes a seat frame 21 and an adjustment component for adjusting the seat frame 21, wherein: the adjustment component includes a relatively arranged fixed base plate 201, a rotation drive plate 202 and an adjustment mechanism.
  • the rotation drive plate 202 can be adjusted through the adjustment mechanism. Adjustably connected to the fixed base plate 201; the rotation drive plate 202 is adjustably connected to the seat frame 21 through at least two first connectors 22, the first end of the first connector 22 is hinged to the seat frame 21, and the other end is hinged to the rotation Driver board 202.
  • the seat frame 21 and the rotation drive plate 202 are hinged through two first connecting parts 22 to form a planar four-bar mechanism as shown in Figure 11.
  • the fixed base plate 201 When in use, the fixed base plate 201 is fixedly installed relative to the ground and rotates by driving The drive plate 202 adjusts the attitude of the planar four-bar mechanism composed of the seat frame 21, the rotating drive plate 202 and the first connecting member 22, thereby adjusting the attitude of the seat frame 21.
  • a hinge hole 5 221 and a hinge hole 6 222 are provided on the first connecting member 22.
  • the hinge point between the first connecting member 22 and the seat frame 21 is the eighth hinge point
  • the hinge point between the first connecting member 22 and the rotating drive plate 202 is the ninth hinge point.
  • the eighth hinge point here is on the central axis of the hinge hole 5 221, and the ninth hinge point is on the central axis of the hinge hole 6 222.
  • the central axis of the hinge hole 5 221 and the central axis of the hinge hole 6 222 are both parallel to the reference axis.
  • D2 is the distance between the central axis of the hinge hole 5 221 and the central axis of the hinge hole 6 222.
  • the adjustment mechanism includes a second connector 23 , a third connector 24 , a fourth connector 25 , a fifth connector 26 , a sixth connector 27 , and a seventh connector 28 and an eighth connecting member 29, wherein: the second connecting member 23 is provided with a hinge hole 231 and a hinge hole 2, the second connecting member 23 is hinged to the rotating drive plate 202 through the hinge hole 231, and the second connecting member 23 is hinged through Hole two is hinged to the third connector 24, and hinge hole two is between the two ends of the third connector 24; the first end of the third connector 24 is hinged to the fixed base plate 201, and the second end is hinged to the fourth connection.
  • the first end of the fourth connecting piece 25; the second end of the fourth connecting piece 25 is hinged to the fifth connecting piece 26, and the hinge point of the two is between the two ends of the fifth connecting piece 26; the fifth connecting piece 26
  • the first end is hinged to the second connector 23, and the hinge point of the two is between hinge hole one 231 and hinge hole two.
  • the second end of the fifth connector 26 is hinged to the first end of the sixth connector 27;
  • the front end of the rotating drive plate 202 (the end close to the leg extension component 1) is adjustably mounted to the front end of the fixed base plate 201 (the end close to the leg extension component 1) through the seventh connecting member 28 and the sixth connecting member 27, and the rear end of the rotating drive plate 202 (the end opposite to its front end) is adjustably mounted to the rear end of the fixed base plate 201 (the end opposite to its front end) through the second connecting member 23 and the third connecting member 24, and cooperates with the first connecting member 22, the fourth connecting member 25, the fifth connecting member 26 and the eighth connecting member 29 so that when the rotating drive plate 202 rotates, the posture of the seat frame 21 can be adjusted.
  • the rotating drive plate 202 is driven in the forward direction, and the adjustment mechanism drives the seat frame 21, so that the front end of the seat frame 21 (the end close to the leg extension component 1) is lifted relative to the ground, and the rear end of the seat frame 21 is lowered relative to the ground, so that the sofa support is adjusted to a lying position.
  • the leg extension component 1 is in an extended state, and the seat frame 21 can be adjusted to a reclining position.
  • the user can achieve a zero-gravity lying position; conversely, when the rotating drive plate 202 is driven in the reverse direction, the adjustment mechanism drives the seat frame 21 so that the front end of the seat frame 21 (the end close to the leg extension component 1) is lowered relative to the ground, while the rear end of the seat frame 21 is raised relative to the ground, so that the sofa support is adjusted to a sitting position.
  • the leg extension component 1 is in a storage state, allowing the user to achieve a conventional sitting position.
  • a backrest assembly 3 is provided on the seat frame 21 to provide support for the user's back to better adjust the posture of the sofa support.
  • the backrest assembly 3 includes a backrest connecting block 31, a backrest limiting block 32, a backrest limiting rod 33, and a ninth connecting piece 35.
  • the backrest connecting block 31 is hinged with the backrest limiting block 32, and one end of the ninth connecting piece 35 is hinged. Between the two end points of the backrest connecting block 31, the other end is hinged to the backrest limit rod 33.
  • the backrest limit rod 33 is provided with a limit column 331, and the backrest limit block 32 is provided with a stopper that matches the limit column 331.
  • the limiting surface 321; the backrest limiting block 32 is fixedly connected to the seat frame 21.
  • the backrest assembly 3 also includes a tenth connecting piece 34.
  • the first end of the tenth connecting piece 34 is hinged to the fixed base plate 201, and the hinge point of the two is the tenth hinge point; the second end of the tenth connecting piece 34 is hinged to One end of the backrest limit rod 33 is away from the backrest connecting block 31, and the hinge point of the two is the eleventh hinge point; the projection point of the tenth hinge point in the datum plane is between the projection point of the eleventh hinge point in the datum plane.
  • the ninth connecting member 35 is provided with hinge hole seven 341 and hinge hole eight 342 respectively.
  • the tenth hinge point is located on the central axis of hinge hole eight 342, and the eleventh hinge point is located on the hinge hole eight.
  • D3 here is the distance between the central axis of hinge hole eight 342 and the central axis of hinge hole seven 341. distance.
  • the backrest limiting block 32 is bifurcated and has two ends, an upper end and a lower end.
  • One end of the backrest connecting block 31 is hinged to the upper end of the backrest limiting block 32, and the backrest limiting block 32 has two ends.
  • the lower end of the bit block 32 is hinged to between the two end points of the backrest limiting rod 33 .
  • This embodiment also provides a seating unit, including the above-mentioned sofa support.
  • the seat unit can be used in a functional sofa, which can provide support for the user's feet or calves, and can provide the user with a zero-gravity lying position through posture adjustment, making it easy to use.
  • two parallel and linked sofa brackets are installed in the seat unit, and the two sofa brackets are linked at least through the front installation pipe 42 and the rear installation pipe 41 .
  • one end of the front mounting tube 42 is connected to the first driving link 11 of one of the sofa brackets, and the other end is connected to the first driving link 11 of the other sofa bracket (not shown in the figure).
  • the rear One end of the installation tube 41 is connected to the fixed base plate 201 of one of the sofa supports, and the other end is connected to the fixed base plate 201 of the other sofa support.
  • a first driving member 4 is provided between the front mounting tube 42 and the rear mounting tube 41 for providing driving force to the first driving link 11 .
  • the first driving member 4 here may be an electric push rod.
  • the fixed base plate 201 is provided with a rear mounting hole, and the height of the center of the rear mounting hole from the ground is 60-100 mm. Preferably, the height of the center of the rear mounting hole from the ground is 85mm.

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

Abstract

本申请提供了一种沙发支架及座椅单元，其中，沙发支架包括铰接至安装架的第一驱动连杆和支撑连杆；还包括第一延伸连杆、第二延伸连杆、主脚凳连杆，第一延伸连杆的一端铰接至支撑连杆的自由端，并且第一延伸连杆铰接至主脚凳连杆；第二延伸连杆的一端铰接至主脚凳连杆，其铰接点为第二铰点，第二延伸连杆和支撑连杆之间的铰接点为第三铰点；当第一驱动连杆绕其与安装架的铰接点转动时，定义第一延伸连杆的处于第二铰点和第三铰点之间的杆段为主杆段，当从第二延伸连杆的外侧沿第一驱动连杆的转轴轴向朝向第一延伸连杆观察时，主杆段的上沿能够被第二延伸连杆遮挡。本申请可防止第二延伸连杆和第一延伸连杆对用户造成夹伤。

Description

一种沙发支架及座椅单元 技术领域
本申请涉及沙发支架技术领域，尤其涉及一种沙发支架及座椅单元。
背景技术
功能性沙发是指具有多种功能的沙发，通过特殊的结构设计能够实现沙发的变形，满足用户坐、躺或者按摩等需求。在使用过程中，为了能够对用户下肢提供支撑，功能沙发的支架一般包括腿部伸展组件和安装架。现有的腿部伸展组件多为平面四杆机构，结构简单方便装配，但是该结构的一组对边之间的间隙在姿态调整过程中容易夹伤用户；并且能够为用户提供支撑的结构支撑面积有限，盲目增大支撑面则会导致腿部伸展组件的体积增大，收纳后其与地面之间的空间变小，用户难以对该区域的地面进行卫生清理。
发明内容
针对现有技术之不足，本申请的第一个目的在于提供一种沙发支架，其第二延伸连杆能够对第一延伸连杆进行遮挡，防止使用过程中对用户造成夹伤。
本申请的另一个目的在于提供一种座椅单元，其能够为用户脚部或者小腿部提供支撑，使用方便。
本申请的实施例通过以下技术方案实现：
一种沙发支架，包括彼此连接的腿部伸展组件和安装架，所述腿部伸展组件包括铰接至所述安装架的第一驱动连杆和支撑连杆；还包括第一延伸连杆、第二延伸连杆、主脚凳连杆、副脚凳连杆和第二驱动连杆，其中：所述第一延伸连杆的一端铰接至所述支撑连杆的自由端，其铰接点为第一铰点，第一延伸连杆的另一端铰接所述第二驱动连杆，并且所述第一延伸连杆铰接至所述主脚凳连杆；所述副脚凳连杆的一端铰接至所述主脚凳连杆，所述第二驱动连杆的自由端铰接至所述副脚凳连杆；所述第二延伸连杆的一端铰接至所述主脚凳连杆，其铰接点为第二铰点，第二延伸连杆的另一端铰接至所述第一驱动连杆的自由端；所述第二延伸连杆和所述支撑连杆在其两者的两端点之间铰接，其铰接点为第三铰点；当第一驱动连杆绕其与所述安装架的铰接点转动时，定义所述第一 延伸连杆的处于所述第二铰点和第三铰点之间的杆段为主杆段，当从所述第二延伸连杆的外侧沿所述第一驱动连杆的转轴轴向朝向所述第一延伸连杆观察时，所述主杆段的上沿能够被所述第二延伸连杆遮挡。
根据一种优选实施方式，所述第一延伸连杆和所述主脚凳连杆的铰接点为第五铰点，所述副脚凳连杆与所述主脚凳连杆的铰接点为第四铰点；所述第二铰点、第五铰点和第四铰点不共线。
根据一种优选实施方式，所述第二延伸连杆上配置有限位凸起；所述支撑连杆上配置有与所述限位凸起配合的收纳缺口和伸展缺口；当所述第一驱动连杆转动时，所述收纳缺口用于限位所述限位凸起以使得所述腿部伸展组件处于收纳状态，所述伸展缺口用于限位所述限位凸起以使得所述腿部伸展组件处于伸展状态。
根据一种优选实施方式，所述主脚凳连杆上配置有第一装配面，所述副脚凳连杆上配置有第二装配面；当所述腿部伸展组件处于所述收纳状态时，所述第一装配面和第二装配面之间呈第一夹角；当所述腿部伸展组件处于所述伸展状态时，所述第一装配面和第二装配面之间呈第二夹角。
根据一种优选实施方式，所述第一驱动连杆和所述第二延伸连杆的铰接点为第六铰点，所述限位凸起分布于所述第三铰点和所述第六铰点之间；所述收纳缺口和所述伸展缺口均朝向所述限位凸起设置。
根据一种优选实施方式，所述第二延伸连杆包括彼此连接的下工作段和上工作段，所述下工作段连接至所述第一驱动连杆，所述上工作段连接至所述主脚凳连杆；所述下工作段与所述上工作段连接处配置有第一过渡圆角，所述第一过渡圆角分布于靠近所述第一铰点的一侧；所述第一过渡圆角朝向所述第一铰点凸出设置。
根据一种优选实施方式，所述第三铰点和所述第六铰点均设置于所述下工作段。
根据一种优选实施方式，所述第一延伸连杆包括依次连接的前工作段、中工作段和后工作段，其中：所述后工作段连接至所述支撑连杆；所述后工作段与所述中工作段连接处配置有第二过渡圆角，所述第二过渡圆角背向所述第一铰点凸出设置。
根据一种优选实施方式，所述前工作段包括彼此连接的工作部和过渡部，所述过渡部连接至所述中工作段，所述工作部连接至所述第二驱动连杆；所述工作部与所述中工作段平行且不共面。
根据一种优选实施方式，所述支撑连杆与所述安装架之间的铰接点为第七铰点；定义第一驱动连杆绕其与所述安装架的铰接点转动时的转轴为基准轴，与所述基准轴垂直 的平面为基准面；所述第一铰点在所述基准面内的投影点与所述第七铰点在所述基准面内的投影点之间的距离为200-240mm。
根据一种优选实施方式，所述安装架包括座框以及用于调节该座框的调节组件，其中：所述调节组件包括相对设置的固定基板、旋转驱动板和调节机构，所述旋转驱动板通过调节机构可调节地连接至所述固定基板；所述旋转驱动板通过至少两个第一连接件可调节地连接至所述座框，第一连接件的第一端铰接至所述座框，另一端铰接至所述旋转驱动板。
根据一种优选实施方式，所述第一连接件与所述座框的铰接点为第八铰点，该第一连接件与所述旋转驱动板的铰接点为第九铰点；所述第八铰点在所述基准面内的投影点和与该第八铰点在同一个所述第一连接件上的所述第九铰点在所述基准面内的投影点之间的距离为110-150mm。
根据一种优选实施方式，所述调节机构包括第二连接件、第三连接件、第四连接件、第五连接件、第六连接件、第七连接件和第八连接件，其中：所述第二连接件上设置有铰接孔一和铰接孔二，所述第二连接件通过铰接孔一铰接至所述旋转驱动板，所述第二连接件通过铰接孔二铰接至所述第三连接件，所述铰接孔二处于所述第三连接件的两个端部之间；所述第三连接件的第一端铰接至所述固定基板，第二端铰接至所述第四连接件的第一端；所述第四连接件的第二端铰接至所述第五连接件，且二者的铰接点处于所述第五连接件的两个端部之间；所述第五连接件的第一端铰接至所述第二连接件，且二者的铰接点处于所述铰接孔一和所述铰接孔二之间，所述第五连接件的第二端铰接至所述第六连接件的第一端；所述第六连接件的第二端铰接至所述固定基板；所述第七连接件的第一端铰接至所述第六连接件，且二者的铰接点处于所述第六连接件的两个端部之间，所述第七连接件的第二端铰接至所述旋转驱动板；所述第八连接件的第一端铰接至所述旋转驱动板，第二端铰接至所述第一驱动连杆。
根据一种优选实施方式，所述座框上设置有靠背组件，所述靠背组件包括靠背连接块、靠背限位块、靠背限位杆、第九连接件，所述靠背连接块与所述靠背限位块铰接，所述第九连接件的一端铰接至所述靠背连接块的两个端点之间，另一端铰接至靠背限位杆，所述靠背限位杆上设置有限位柱，所述靠背限位块上设有与所述限位柱相匹配的限位面；所述靠背限位块固定连接至所述座框。
根据一种优选实施方式，所述靠背组件还包括第十连接件，第十连接件的第一端铰接至固定基板，二者的铰接点为第十铰点；所述第十连接件第二端铰接至所述靠背限位 杆远离靠背连接块的一端，二者的铰接点为第十一铰点；所述第十铰点在所述基准面内的投影点与所述第十一铰点在所述基准面内的投影点之间的距离为65-100mm。
一种座椅单元，包括上述的沙发支架。
本申请实施例的技术方案至少具有如下优点和有益效果：
本申请提供的沙发支架，通过对第一延伸连杆和第二延伸连杆的结构设计，使得第一延伸连杆的处于第二铰点和第三铰点之间的杆段(主杆段)的上沿在第一驱动连杆的转轴轴向上与第二延伸连杆重合，即在第二延伸连杆的外侧沿第一驱动连杆的转轴轴向朝向第一延伸连杆观察时，主杆段的上沿能够被第二延伸连杆遮挡；进而可避免在腿部伸展组件姿态调整过程中，第一延伸连杆和第二延伸连杆之间的缝隙对用户造成夹伤，第二延伸连杆作为腿部伸展组件的构成杆件，一方面起到结构支撑连接作用，另一方面起到安全防护作用，无需外加特定的防夹伤构件，保障了安全性的同时简化了该沙发支架的结构；同时，通过设置第二驱动连杆和副脚凳连杆的方式，使得副脚凳连杆能够对主脚凳连杆在为用户提供支撑时进行一定程度上的功能性补充，即副脚凳连杆与主脚凳连杆同样为用户提供支撑，这里的副脚凳连杆可收纳，结构紧凑，占用空间小。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，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他相关的附图。
图1为本申请实施例提供的腿部伸展组件的立体结构示意图；
图2为本申请实施例提供的腿部伸展组件处于伸展状态的正视结构示意图；
图3为本申请实施例提供的腿部伸展组件处于收纳状态的正视结构示意图；
图4为本申请实施例提供的第二延伸连杆的立体结构示意图；
图5为本申请实施例提供的第一延伸连杆的立体结构示意图；
图6为本申请实施例提供的第一延伸连杆的俯视结构示意图；
图7为本申请实施例提供的支撑连杆的立体结构示意图；
图8为本申请实施例提供的沙发支架处于收纳状态的立体结构示意图；
图9为本申请实施例提供的沙发支架处于半伸展状态的立体结构示意图；
图10为本申请实施例提供的沙发支架处于伸展状态的立体结构示意图；
图11为本申请实施例提供的沙发支架处于伸展状态的正视结构示意图；
图12为本申请实施例提供的沙发支架处于伸展状态的后视结构示意图；
图13为本申请实施例提供的第一连接件的正视结构示意图；
图14为本申请实施例提供的第十连接件的正视结构示意图；
图15为本申请实施例提供的沙发支架装配第一驱动件后的立体结构示意图；
图16为本申请实施例提供的沙发支架装配至座椅单元后相对于地面的正视结构示意图；
图17为本申请实施例提供的沙发支架处于躺姿状态的正视结构示意图。
图标：1、腿部伸展组件；11、第一驱动连杆；12、支撑连杆；121、伸展缺口；122、收纳缺口；123、铰接孔三；124、铰接孔四；13、第二延伸连杆；131、上工作段；132、下工作段；133、第一过渡圆角；14、主脚凳连杆；141、第一装配面；15、第一延伸连杆；151、后工作段；152、中工作段；153、前工作段；1531、过渡部；1532、工作部；154、第二过渡圆角；16、第二驱动连杆；17、副脚凳连杆；171、第二装配面；18、限位凸起；191、第一铰点；192、第六铰点；193、第三铰点；194、第二铰点；195、第四铰点；196、第五铰点；197、第七铰点；α、第一夹角；β、第二夹角；2、安装架；201、固定基板；202、旋转驱动板；21、座框；22、第一连接件；221、铰接孔五；222、铰接孔六；23、第二连接件；231、铰接孔一；24、第三连接件；25、第四连接件；26、第五连接件；27、第六连接件；28、第七连接件；29、第八连接件；3、靠背组件；31、靠背连接块；32、靠背限位块；321、限位面；33、靠背限位杆；331、限位柱；34、第十连接件；341、铰接孔七；342、铰接孔八；35、第九连接件；4、第一驱动件；41、后安装管；42、前安装管。
具体实施方式
为了更好地理解和实施，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
在本申请的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在限制本申请。
请参照图1至图17，一种沙发支架，包括彼此连接的腿部伸展组件1和安装架2，腿部伸展组件1包括铰接至安装架2的第一驱动连杆11和支撑连杆12；还包括第一延伸连杆15、第二延伸连杆13、主脚凳连杆14、副脚凳连杆17和第二驱动连杆16，其中：第一延伸连杆15的一端铰接至支撑连杆12的自由端，其铰接点为第一铰点191，第一延伸连杆15的另一端铰接第二驱动连杆16，并且第一延伸连杆15铰接至主脚凳连杆14；副脚凳连杆17的一端铰接至主脚凳连杆14，第二驱动连杆16的自由端铰接至副脚凳连杆17；第二延伸连杆13的一端铰接至主脚凳连杆14，其铰接点为第二铰点194，第二延伸连杆13的另一端铰接至第一驱动连杆11的自由端；第二延伸连杆13和支撑连杆12在其两者的两端点之间铰接，其铰接点为第三铰点193；当第一驱动连杆11绕其与安装架2的铰接点转动时，定义第一延伸连杆15的处于第二铰点194和第三铰点193之间的杆段为主杆段，当从第二延伸连杆13的外侧沿第一驱动连杆11的转轴轴向朝向第一延伸连杆15观察时，主杆段的上沿能够被第二延伸连杆13遮挡。。本实施例中的安装架2可以是现有技术中任一种应用于工作能沙发安装架2，配合腿部伸展组件1能够组成沙发支架即可。
本实施例中，第一延伸连杆15和主脚凳连杆14的铰接点为第五铰点196，副脚凳连杆17与主脚凳连杆14的铰接点为第四铰点195；第二铰点194、第五铰点196和第四铰点195不共线。第一驱动连杆11和第二延伸连杆13的铰接点为第六铰点192。具体地如图1、图2、图3、图8和图10所示，这里的第一延伸连杆15、第二延伸连杆13、主脚凳连杆14和支撑连杆12构成第一平面四杆机构，该平面四杆机构在第一驱动连杆11对第二延伸连杆13施加外力的情况下能够进行由图2至图3的姿态调整，更具体地体现在如图8至图10(由收纳状态至伸展状态)或者图10至图8(由伸展状态至收纳状态)，从而实现功能沙发的姿态调整，便于用户使用。在使用时，用户无需对其腿部进行支撑放松时，腿部伸展组件1处于收纳状态，当用户将腿部伸展组件1调整为伸展状态时，主脚凳连杆14能够给用户脚部或者小腿部提供向上的支撑力，进而达到缓解用户下肢疲劳的目的。
本实施例中，第一延伸连杆15和第二延伸连杆13为第一平面四杆机构的其中一组对边，且第一延伸连杆15处于第二延伸连杆13的内侧，这里通过加宽第二延伸连杆13 的方式以对第一延伸连杆15在外侧进行遮挡，使得第一平面四杆机构姿态调整轨迹不变的情况下，第一延伸杆的处于第二铰点194和第三铰点193之间部分的杆段的上沿在第一驱动连杆11的转轴轴向上与第二延伸连杆13重合，即在第二延伸连杆13的外侧沿第一驱动连杆11的转轴轴向朝向第一延伸连杆15(朝向如图8所示的内侧)观察时，主杆段的上沿能够被第二延伸连杆13遮挡。进而可避免在腿部伸展组件1姿态调整过程中，第一延伸连杆15和第二延伸连杆13之间的缝隙对用户造成夹伤。这里需要说明的是，主杆段的区域并不是固定的，而是随着腿部伸展组件1的运动不断变化的。这里的第二延伸连杆13作为腿部伸展组件1的构成杆件，一方面起到结构支撑连接作用，另一方面起到安全防护作用，无需外加特定的防夹伤构件，保障了安全性的同时简化了该沙发支架的结构。
进一步地，本实施例中，如图1、图2和图3所示，主脚凳连杆14、第二驱动连杆16、第一延伸连杆15和副脚凳连杆17构成第二平面四杆机构，这里的第二平面四杆机构与第一平面四杆机构串联。在第一平面四杆机构进行姿态调整时，第二平面四杆机构随之进行姿态调整，可通过副脚凳连杆17对主脚凳连杆14在结构空间上进行补充，使得在腿部伸展组件1收纳后与地面之间的距离基本不变的条件下，腿部伸展组件1在伸展状态下能够为用户的脚部或者小腿部提供更大的支撑面积，支撑效果好的同时能够使得应用该沙发支架的功能沙发适应更大体型区间的用户，即用户覆盖面更广。
如图2、图4、图8和图10所示，第二延伸连杆13包括彼此连接的下工作段132和上工作段131，下工作段132连接至第一驱动连杆11，上工作段131连接至主脚凳连杆14；下工作段132与上工作段131连接处配置有第一过渡圆角133，第一过渡圆角133分布于靠近第一铰点191的一侧；第一过渡圆角133朝向第一铰点191凸出设置。本实施例中，上工作段131和下工作段132一体成型，第三铰点193和第六铰点192均设置于下工作段132。在装配后，无论是沙发支架处于收纳状态还是伸展状态，上工作段131的结构中心总是高于下工作段132的结构中心，从而使得沙发支架无论是收纳状态还是伸展状态，腿部伸展组件1总是保持主脚凳连杆14一端上翘，这种结构设计一方面可以在沙发支架处于伸展状态时使得主脚凳连杆14能尽可能高地将用户的脚部或者小腿部太高，促进用户下肢血液循环达到放松的目的；另一方面当沙发支架处于收纳状态时，腿部伸展组件1前端上翘使得其与地面之间的空间大，方便用户对腿部伸展组件1下方进行卫生清理。
本实施例中，如图2、图3和图4所示，第一过渡圆角133用于对第一铰点191部分结构进行遮挡。具体地，在第一平面四杆机构姿态调整过程中，第一铰点191绕第三铰点193做圆周运动，这里的第一过渡圆角133结构设计与第一铰点191运动轨迹基本适配，能够在第一铰点191运动过程中对其进行遮挡，能够在满足遮挡第一延伸连杆15的基础上尽可能减小第二延伸连杆13宽度的作用，节省第二延伸连杆13生产成本的同时可减小腿部伸展组件1体积，增加腿部伸展组件1与地面之间的高度，方便用户打扫卫生。
本实施例中，第二延伸连杆13上配置有限位凸起18；支撑连杆12上配置有与限位凸起18配合的收纳缺口122和伸展缺口121；当第一驱动连杆11转动时，收纳缺口122用于配合限位凸起18以使得腿部伸展组件1处于收纳状态，伸展缺口121用于配合限位凸起18以使得腿部伸展组件1处于伸展状态。如图1、图2、图4和图7所示，这里的伸展缺口121和收纳缺口122均用于与限位凸起18配合，具体地，如图2所示，第一驱动连杆11转动驱动腿部伸展组件1运动过程中，支撑连杆12与第二延伸连杆13绕第三铰点193相对转动，当支撑连杆12相对于第二延伸连杆13绕第三铰点193顺时针转动至伸展缺口121卡接至限位凸起18时，伸展组件保持伸展状态；而当支撑连杆12相对于第二延伸连杆13绕第三铰点193逆时针转动至收纳缺口122卡接至限位凸起18时，伸展组件保持收纳状态。本实施例中，限位凸起18分布于第三铰点193和第六铰点192之间；收纳缺口122和伸展缺口121均朝向限位凸起18设置。
如图2和图3所示，主脚凳连杆14上配置有第一装配面141，副脚凳连杆17上配置有第二装配面171；当腿部伸展组件1处于收纳状态时，第一装配面141和第二装配面171之间呈第一夹角α，第一夹角α为85°-95°；当腿部伸展组件1处于伸展状态时，第一装配面141和第二装配面171之间呈第二夹角β，第二夹角β为0°-10°。本实施例中，优选的，当腿部伸展组件1处于收纳状态时，第一夹角α为90°；当腿部伸展组件1处于伸展状态时，第二夹角β为0°。具体如图3和图8所示，在使用时，腿部伸展组件1即沙发支架处于收纳状态时，第一装配面141与地面基本垂直，第二装配面171与地面基本平行。这样设置使得腿部伸展组件1结构紧凑，占用空间小。而如图2和图10所示，腿部伸展组件1即沙发支架处于伸展状态时，第一装配面141和第二装配面171基本平行且朝向同一侧设置，从而使得第二装配面171在功能上能够很好地对第一装配面141的支撑面积进行扩充，增大腿部伸展组件1的支撑面积，有利于提高腿部伸展组件1的舒适度。
如图5和图6所示，本实施例中，第一延伸连杆15包括依次连接的前工作段153、中工作段152和后工作段151，其中：后工作段151连接至支撑连杆12；后工作段151与中工作段152连接处配置有第二过渡圆角154，第二过渡圆角154背向第一铰点191凸出设置。这里的前工作段153、中工作段152和后工作段151一体成型。这里的后工作段151与中工作段152呈夹角设置，可在不改变第一延伸连杆15作用的前提下使得其处于第一铰点191和第二铰点194之间的杆段的上沿更接近第二延伸连杆13的上沿，结构紧凑，便于第二延伸连杆13对第一延伸连杆15进行遮挡，防止第二延伸连杆13的下沿与第一延伸连杆15的上沿之间形成间隙，能够起到防止夹伤用户的作用，安全性高。后工作段151与中工作段152连接处形成的第二过渡圆角154可减小连接处的应力集中，结构强度高。
本实施例中，前工作段153包括彼此连接的工作部1532和过渡部1531，过渡部1531连接至中工作段152，工作部1532连接至第二驱动连杆16；工作部1532与中工作段152平行且不共面。具体地，如图1、图5和图6所示，工作部1532与中工作段152平行且不共面的结构设计便于工作部1532与第二驱动连杆16铰接。
本实施例中，支撑连杆12与安装架2之间的铰接点为第七铰点197，定义第一驱动连杆11绕其与安装架2的铰接点转动时的转轴为基准轴，与基准轴垂直的平面为基准面；第一铰点191在基准面内的投影点与第七铰点197在基准面内的投影点之间的距离为D1，D1＝200-240mm。本实施例中，优选的，D1＝215.53mm。具体地，如图7所示，支撑连杆12上分别设置有铰接孔三123和铰接孔四124，其中，第七铰点197处于铰接孔三123的中轴线上，第一铰点191处于铰接孔四124的中轴线上，铰接孔三123的中轴线与铰接孔四124的中轴线均与基准轴平行。这里的D1为铰接孔三123的中轴线与铰接孔四124的中轴线之间的距离。这里的D1长度限定，在保证腿部伸展组件1于伸展状态打开长度的同时，又可保证在收纳过程中不与地面产生干涉。
进一步地，安装架2包括座框21以及用于调节该座框21的调节组件，其中：调节组件包括相对设置的固定基板201、旋转驱动板202和调节机构，旋转驱动板202通过调节机构可调节地连接至固定基板201；旋转驱动板202通过至少两个第一连接件22可调节地连接至座框21，第一连接件22的第一端铰接至座框21，另一端铰接至旋转驱动板202。这里的座框21和旋转驱动板202通过两个第一连接件22铰接，以构成如图11所示的平面四杆机构。在使用时，固定基板201相对于地面固定安装，通过驱动旋转 驱动板202对由座框21、旋转驱动板202和第一连接件22构成的平面四杆机构进行姿态调整，从而实现对座框21的姿态调整。
本实施例中，如图13所示，第一连接件22上设置有铰接孔五221和铰接孔六222，第一连接件22与座框21的铰接点为第八铰点，该第一连接件22与旋转驱动板202的铰接点为第九铰点，第八铰点在基准面内的投影点与第九铰点在基准面内的投影点之间的距离为D2，D2＝110-150mm。本实施例中，优选的，D2＝125.5mm。可保证本沙发支架应用于沙发或者座椅时，沙发或者座椅的高度能够达到430-500mm之间。本实施例中，这里的第八铰点处于铰接孔五221的中轴线上，第九铰点处于铰接孔六222的中轴线上，铰接孔五221的中轴线和铰接孔六222的中轴线均与基准轴平行。这里的D2为铰接孔五221的中轴线与铰接孔六222的中轴线之间的距离。
进一步地，如图10至图12所示，调节机构包括第二连接件23、第三连接件24、第四连接件25、第五连接件26、第六连接件27、第七连接件28和第八连接件29，其中：第二连接件23上设置有铰接孔一231和铰接孔二，第二连接件23通过铰接孔一231铰接至旋转驱动板202，第二连接件23通过铰接孔二铰接至第三连接件24，铰接孔二处于第三连接件24的两个端部之间；第三连接件24的第一端铰接至固定基板201，第二端铰接至第四连接件25的第一端；第四连接件25的第二端铰接至第五连接件26，且二者的铰接点处于第五连接件26的两个端部之间；第五连接件26的第一端铰接至第二连接件23，且二者的铰接点处于铰接孔一231和铰接孔二之间，第五连接件26的第二端铰接至第六连接件27的第一端；第六连接件27的第二端铰接至固定基板201；第七连接件28的第一端铰接至第六连接件27，且二者的铰接点处于第六连接件27的两个端部之间，第七连接件28的第二端铰接至旋转驱动板202；第八连接件29的第一端铰接至旋转驱动板202，第二端铰接至第一驱动连杆11。
本实施例中，旋转驱动板202的前端(靠近腿部伸展组件1的一端)通过第七连接件28和第六连接件27可调节地安装至固定基板201的前端(靠近腿部伸展组件1的一端)，旋转驱动板202的后端(与其前端相对的一端)通过第二连接件23和第三连接件24可调节地安装至固定基板201的后端(与其前端相对的一端)，配合第一连接件22、第四连接件25、第五连接件26以及第八连接件29使得旋转驱动板202转动时，座框21的姿态能够被调节。具体地，旋转驱动板202正向驱动，调节机构驱动座框21，以使得座框21的前端(靠近腿部伸展组件1的一端)相对于地面抬升，而座框21的后端相对于地面降低，以使得沙发支架调整为躺姿，此时腿部伸展组件1处于伸展状态，可 供用户实现零重力躺姿；相对地，当旋转驱动板202反向驱动时，调节机构驱动座框21，以使得座框21的前端(靠近腿部伸展组件1的一端)相对于地面降低，而座框21的后端相对于地面抬升，以使得沙发支架调整为坐姿，此时腿部伸展组件1处于收纳状态，可供用户实现常规的坐姿。
本实施例中，座框21上设置有靠背组件3，用于给用户的背部提供支撑，以更好地实现沙发支架的姿态调整。具体地，靠背组件3包括靠背连接块31、靠背限位块32、靠背限位杆33、第九连接件35，靠背连接块31与靠背限位块32铰接，第九连接件35的一端铰接至靠背连接块31的两个端点之间，另一端铰接至靠背限位杆33，靠背限位杆33上设置有限位柱331，靠背限位块32上设有与限位柱331相匹配的限位面321；靠背限位块32固定连接至座框21。进一步地，靠背组件3还包括第十连接件34，第十连接件34的第一端铰接至固定基板201，二者的铰接点为第十铰点；第十连接件34第二端铰接至靠背限位杆33远离靠背连接块31的一端，二者的铰接点为第十一铰点；第十铰点在基准面内的投影点与第十一铰点在基准面内的投影点之间的距离为D3，D3＝65-100mm。本实施例中，优选的，D3＝74.18mm。如图11和图14所示，第九连接件35上分别设置有铰接孔七341和铰接孔八342，第十铰点处于铰接孔八342的中轴线上，第十一铰点处于铰接孔七341的中轴线上，铰接孔八342的中轴线和铰接孔七341的中轴线均与基准轴平行，这里的D3为铰接孔八342的中轴线与铰接孔七341的中轴线之间的距离。
如图11所示，本实施例中，靠背限位块32呈分叉状，具有两个端部，为上端和下端，靠背连接块31的一端铰接至靠背限位块32的上端，靠背限位块32的下端铰接至靠背限位杆33的两个端点之间。在使用时，沙发支架由坐姿调节为如图17所示的躺姿(零重力)状态时，座框21的后端相对于地面高度降低，从而使得安装在座框21后端的靠背限位块32上端相对于地面升高，而靠背限位块32的下端相对于地面下降，从而驱动靠背连接块31绕靠背限位块32的上端顺时针转动，并使得靠背连接块31通过第九连接件35驱动靠背限位杆33绕靠背限位块32的下端逆时针转动，直至限位柱331抵接至限位面321，以此使得用户的上半身能够实现更低地躺姿，从而更好地实现零重力躺姿。本实施例还提供了一种座椅单元，包括上述的沙发支架。该座椅单元可用于功能沙发，其能够为用户脚部或者小腿部提供支撑，并通过姿态调整能够为用户提供零重力躺姿，使用方便。
具体地，如图15和图16所示，座椅单元内安装有两个平行且联动的沙发支架，两个沙发支架之间至少通过前安装管42和后安装管41联动。具体地，前安装管42的一端连接至其中一个沙发支架的第一驱动连杆11，另一端连接至另一个沙发支架(图中未示出)的第一驱动连杆11，同样地，后安装管41的一端连接至其中一个沙发支架的固定基板201，另一端连接至另一个沙发支架的固定基板201。于前安装管42和后安装管41之间设置有第一驱动件4，用于给第一驱动连杆11提供驱动力。这里的第一驱动件4可以是电推杆。
本实施例中，后安装管41的最低点距地面的距离为D4，D4＝30-60mm。优选的，D4＝45.6mm。
如图12所示，本实施例中，固定基板201上设置有后安装孔，该后安装孔的中心距地面的高度为60-100mm。优选的，后安装孔的中心距地面的高度为85mm。
本申请方案所公开的技术手段不仅限于上述实施方式所公开的技术手段，还包括由以上技术特征任意组合所组成的技术方案。应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。

Claims (16)

  1. 一种沙发支架，包括彼此连接的腿部伸展组件(1)和安装架(2)，其特征在于，所述腿部伸展组件(1)包括铰接至所述安装架(2)的第一驱动连杆(11)和支撑连杆(12)；还包括第一延伸连杆(15)、第二延伸连杆(13)、主脚凳连杆(14)、副脚凳连杆(17)和第二驱动连杆(16)，其中：
    所述第一延伸连杆(15)的一端铰接至所述支撑连杆(12)的自由端，其铰接点为第一铰点(191)，第一延伸连杆(15)的另一端铰接所述第二驱动连杆(16)，并且所述第一延伸连杆(15)铰接至所述主脚凳连杆(14)；所述副脚凳连杆(17)的一端铰接至所述主脚凳连杆(14)，所述第二驱动连杆(16)的自由端铰接至所述副脚凳连杆(17)；
    所述第二延伸连杆(13)的一端铰接至所述主脚凳连杆(14)，其铰接点为第二铰点(194)，第二延伸连杆(13)的另一端铰接至所述第一驱动连杆(11)的自由端；
    所述第二延伸连杆(13)和所述支撑连杆(12)在其两者的两端点之间铰接，其铰接点为第三铰点(193)；
    当第一驱动连杆(11)绕其与所述安装架(2)的铰接点转动时，定义所述第一延伸连杆(15)的处于所述第二铰点(194)和第三铰点(193)之间的杆段为主杆段，当从所述第二延伸连杆(13)的外侧沿所述第一驱动连杆(11)的转轴轴向朝向所述第一延伸连杆(15)观察时，所述主杆段的上沿能够被所述第二延伸连杆(13)遮挡。
  2. 根据权利要求1所述的沙发支架，其特征在于，所述第一延伸连杆(15)和所述主脚凳连杆(14)的铰接点为第五铰点(196)，所述副脚凳连杆(17)与所述主脚凳连杆(14)的铰接点为第四铰点(195)；
    所述第二铰点(194)、第五铰点(196)和第四铰点(195)不共线。
  3. 根据权利要求2所述的沙发支架，其特征在于，所述第二延伸连杆(13)上配置有限位凸起(18)；
    所述支撑连杆(12)上配置有与所述限位凸起(18)配合的收纳缺口(122)和伸展缺口(121)；
    当所述第一驱动连杆(11)转动时，所述收纳缺口(122)用于限位所述限位凸起(18)以使得所述腿部伸展组件(1)处于收纳状态，所述伸展缺口(121)用于限位所述限位凸起(18)以使得所述腿部伸展组件(1)处于伸展状态。
  4. 根据权利要求3所述的沙发支架，其特征在于，所述主脚凳连杆(14)上配置有第一装配面(141)，所述副脚凳连杆(17)上配置有第二装配面(171)；
    当所述腿部伸展组件(1)处于所述收纳状态时，所述第一装配面(141)和第二装配面(171)之间呈第一夹角(α)；
    当所述腿部伸展组件(1)处于所述伸展状态时，所述第一装配面(141)和第二装配面(171)之间呈第二夹角(β)。
  5. 根据权利要求3所述的沙发支架，其特征在于，所述第一驱动连杆(11)和所述第二延伸连杆(13)的铰接点为第六铰点(192)，所述限位凸起(18)分布于所述第三铰点(193)和所述第六铰点(192)之间；
    所述收纳缺口(122)和所述伸展缺口(121)均朝向所述限位凸起(18)设置。
  6. 根据权利要求5所述的沙发支架，其特征在于，所述第二延伸连杆(13)包括彼此连接的下工作段(132)和上工作段(131)，所述下工作段(132)连接至所述第一驱动连杆(11)，所述上工作段(131)连接至所述主脚凳连杆(14)；
    所述下工作段(132)与所述上工作段(131)连接处配置有第一过渡圆角(133)，所述第一过渡圆角(133)分布于靠近所述第一铰点(191)的一侧；
    所述第一过渡圆角(133)朝向所述第一铰点(191)凸出设置。
  7. 根据权利要求6所述的沙发支架，其特征在于，所述第三铰点(193)和所述第六铰点(192)均设置于所述下工作段(132)。
  8. 根据权利要求1所述的沙发支架，其特征在于，所述第一延伸连杆(15)包括依次连接的前工作段(153)、中工作段(152)和后工作段(151)，其中：
    所述后工作段(151)连接至所述支撑连杆(12)；
    所述后工作段(151)与所述中工作段(152)连接处配置有第二过渡圆角(154)，所述第二过渡圆角(154)背向所述第一铰点(191)凸出设置。
  9. 根据权利要求8所述的沙发支架，其特征在于，所述前工作段(153)包括彼此连接的工作部(1532)和过渡部(1531)，所述过渡部(1531)连接至所述中工作段(152)，所述工作部(1532)连接至所述第二驱动连杆(16)；
    所述工作部(1532)与所述中工作段(152)平行且不共面。
  10. 根据权利要求1-9中任一项所述的沙发支架，其特征在于，所述支撑连杆(12)与所述安装架(2)之间的铰接点为第七铰点(197)；
    定义所述第一驱动连杆(11)绕其与所述安装架(2)的铰接点转动时的转轴为基准轴，与所述基准轴垂直的平面为基准面；
    所述第一铰点(191)在所述基准面内的投影点与所述第七铰点(197)在所述基准面内的投影点之间的距离为200-240mm。
  11. 根据权利要求10所述的沙发支架，其特征在于，所述安装架(2)包括座框(21)以及用于调节该座框(21)的调节组件，其中：
    所述调节组件包括相对设置的固定基板(201)、旋转驱动板(202)和调节机构，所述旋转驱动板(202)通过调节机构可调节地连接至所述固定基板(201)；
    所述旋转驱动板(202)通过至少两个第一连接件(22)可调节地连接至所述座框(21)，第一连接件(22)的第一端铰接至所述座框(21)，另一端铰接至所述旋转驱动板(202)。
  12. 根据权利要求11所述的沙发支架，其特征在于，所述第一连接件(22)与所述座框(21)的铰接点为第八铰点，该第一连接件(22)与所述旋转驱动板(202)的铰接点为第九铰点；
    所述第八铰点在所述基准面内的投影点和与该第八铰点在同一个所述第一连接件(22)上的所述第九铰点在所述基准面内的投影点之间的距离为110-150mm。
  13. 根据权利要求11或12所述沙发支架，其特征在于，所述调节机构包括第二连接件(23)、第三连接件(24)、第四连接件(25)、第五连接件(26)、第六连接件(27)、第七连接件(28)和第八连接件(29)，其中：
    所述第二连接件(23)上设置有铰接孔一(231)和铰接孔二，所述第二连接件(23)通过铰接孔一(231)铰接至所述旋转驱动板(202)，所述第二连接件(23)通过铰接孔二铰接至所述第三连接件(24)，所述铰接孔二处于所述第三连接件(24)的两个端部之间；
    所述第三连接件(24)的第一端铰接至所述固定基板(201)，第二端铰接至所述第四连接件(25)的第一端；
    所述第四连接件(25)的第二端铰接至所述第五连接件(26)，且二者的铰接点处于所述第五连接件(26)的两个端部之间；
    所述第五连接件(26)的第一端铰接至所述第二连接件(23)，且二者的铰接点处于所述铰接孔一(231)和所述铰接孔二之间，所述第五连接件(26)的第二端铰接至所述第六连接件(27)的第一端；
    所述第六连接件(27)的第二端铰接至所述固定基板(201)；
    所述第七连接件(28)的第一端铰接至所述第六连接件(27)，且二者的铰接点处于所述第六连接件(27)的两个端部之间，所述第七连接件(28)的第二端铰接至所述旋转驱动板(202)；
    所述第八连接件(29)的第一端铰接至所述旋转驱动板(202)，第二端铰接至所述第一驱动连杆(11)。
  14. 根据权利要求11所述的沙发支架，其特征在于，所述座框(21)上设置有靠背组件(3)，所述靠背组件(3)包括靠背连接块(31)、靠背限位块(32)、靠背限位杆(33)、第九连接件(35)，所述靠背连接块(31)与所述靠背限位块(32)铰接，所述第九连接件(35)的一端铰接至所述靠背连接块(31)的两个端点之间，另一端铰接至靠背限位杆(33)，所述靠背限位杆(33)上设置有限位柱(331)，所述靠背限位块(32)上设有与所述限位柱(331)相匹配的限位面(321)；
    所述靠背限位块(32)固定连接至所述座框(21)。
  15. 根据权利要求14所述的沙发支架，其特征在于，所述靠背组件(3)还包括第十连接件(34)，第十连接件(34)的第一端铰接至固定基板(201)，二者的铰接点为第十铰点；
    所述第十连接件(34)第二端铰接至所述靠背限位杆(33)远离靠背连接块(31)的一端，二者的铰接点为第十一铰点；
    所述第十铰点在所述基准面内的投影点与所述第十一铰点在所述基准面内的投影点之间的距离为65-100mm。
  16. 一种座椅单元，其特征在于：包括如权利要求1-15中任一项所述的沙发支架。
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CN115500641A (zh) * 2022-09-20 2022-12-23 锐迈科技股份有限公司 一种沙发支架及座椅单元

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