Stretching device and sofa

Abstract

The utility model provides a stretching device and a sofa. The stretching device can be arranged in a reciprocating and switchable manner among a sitting posture state, a leisure state and a lying posture state; when the stretching device is in the sitting posture state, the foot rest piece is retracted below the seat frame, and the minimum distance between the highest point of the backrest cushion and a preset vertical plane is equal to zero; when the stretching device is in a leisure state, the foot rest piece stretches to the front of the seat frame and inclines relative to the horizontal direction, and the distance between the highest point of the backrest cushion and a preset vertical plane is larger than zero; when the stretching device is in the lying posture state, the minimum distance between the highest point of the backrest cushion and the preset vertical plane is equal to zero, and the height of the highest point of the foot rest piece relative to the horizontal installation base plane is larger than that of the highest point of the backrest piece relative to the horizontal installation base plane. The utility model solves the problem that the iron stand floor sofa in the prior art cannot meet the requirements of customers on zero wall-leaning arrangement and zero-gravity comfortable experience of the sofa at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of multifunctional sofas, in particular to a stretching device and a sofa. Background Art

[0002] A typical movable sofa consists of a functional metal frame (also known as an extension mechanism), which is divided into sections based on upholstered components such as the backrest, seat frame, and footrest. This frame is equipped with a linear actuator that drives the frame between sitting, relaxing (also known as TV position), and reclining positions, thereby driving the movable sofa's transitions between these three positions. A movable sofa also includes a floor-standing metal frame, which refers to a sofa with an internal floor-standing metal frame.

[0003] Users demand functional or comfort features such as zero gravity and zero wall leaning for movable sofas. Zero wall leaning means the sofa backrest can be leaned against a wall and adjusted while remaining leaning against the wall, without interference between the backrest and the wall. Zero gravity also means that when the sofa is adjusted to a reclining position, it simulates a space capsule setting, allowing the user's legs to be slightly higher than their heart, reducing pressure on the spine and joints, allowing the user to freely enjoy a stress-free state of relaxation.

[0004] However, common iron frame floor sofas cannot simultaneously meet customers' requirements for zero-wall placement and zero-gravity comfort experience. Utility Model Content

[0005] The main purpose of the present invention is to provide an extension device and a sofa to solve the problem that the iron frame floor-standing sofa in the prior art cannot simultaneously meet the customer's requirements for the zero-wall arrangement of the sofa and the zero-gravity comfortable experience.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a stretching device is provided, comprising: a supporting iron frame and two stretching components, the supporting iron frame is arranged on a horizontal installation base surface, and the two stretching components are respectively arranged on opposite sides of the supporting iron frame; each stretching component comprises: a base plate, a foot support component and a back support component, the base plate is used to connect the seat frame of the sofa, the base plate can be movably arranged on the supporting iron frame, the foot support component and the back support component are both movably connected to the base plate, the foot support component includes a footrest component, and the back support component includes a backrest component, which is used to connect the back cushion of the sofa; the stretching device has a sitting state, a leisure state and a lying state, and the base plates of each stretching component can be movably arranged so that the stretching device can be stretched when sitting The invention can be switched back and forth between a sitting position, a leisure position and a lying position; wherein, when the extension device is in a sitting position, the footrest is retracted under the seat frame, and the minimum distance between the highest point of the back cushion and a preset vertical plane is equal to zero; when the extension device is in a leisure position, the footrest is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion and the preset vertical plane is greater than zero; when the extension device is in a lying position, the highest point of the back cushion is lowered relative to the stretching device in the leisure position, and the minimum distance between the highest point of the back cushion and the preset vertical plane is equal to zero; the height of the highest point of the foot support component relative to the horizontal mounting base surface is greater than the height of the highest point of the back support component relative to the horizontal mounting base surface.

[0007] Furthermore, when the stretching device is in a lying state, the angle θ1 between the upper surface of the footrest and the horizontal mounting base surface is in the range of 10°≤θ1≤12°; when the stretching device is in a leisure state, the angle θ1 between the upper surface of the footrest and the horizontal mounting base surface is in the range of 6°≤θ1≤7°.

[0008] Furthermore, there are two footrests, one of the two footrests is the first footrest, and the other of the two footrests is the second footrest. The highest point of the second footrest is higher than the highest point of the first footrest, and the height of the highest point of the first footrest relative to the horizontal mounting base surface is greater than the height of the highest point of the backrest relative to the horizontal mounting base surface; the angle θ1 between the upper surface of the second footrest and the horizontal mounting base surface is in the range of 10°≤θ1≤12°; when the extension device is in the leisure state, the angle θ1 between the upper surface of the second footrest and the horizontal mounting base surface is in the range of 6°≤θ1≤7°.

[0009] Furthermore, when the extension device is in a lying state, the range of the angle β1 between the backrest member and the horizontal mounting base surface is: 15°≤β1≤30°; in the process of the extension device switching from a sitting state to a lying state, the range of the change angle δ1 of the angle β1 between the backrest member and the horizontal mounting base surface is: 25°≤δ1≤50°; wherein, δ1=β1sitting position-β1lying position.

[0010] Furthermore, when the stretching device is in a lying state, the range of the angle β2 between the preset axis on the substrate and the horizontal mounting base surface is: 13°≤β2≤19°; when the stretching device is in a sitting state, the range of the angle β2 between the preset axis on the substrate and the horizontal mounting base surface is: 6°≤β2≤10°; when the stretching device is in a leisure state, the range of the angle β2 between the preset axis on the substrate and the horizontal mounting base surface is: 10°≤β2≤13°; in the process of switching the stretching device from a sitting state to a lying state, the range of the change angle δ2 of the angle β2 between the preset axis on the substrate and the horizontal mounting base surface is: 3°≤δ2≤13°.

[0011] Furthermore, the foot support component includes a first foot support component and a second foot support component, one end of the first foot support component and one end of the second foot support component are hinged to the base plate, the other end of the first foot support component is hinged to the first footrest, and the other end of the second foot support component is hinged to the second footrest; wherein, when the extension device is in a lying state and a leisure state respectively, the maximum distance d4 between the first footrest and the second footrest is in the range of 200mm≤d4≤220mm; when the extension device is in the lying state, the height d5 of the highest point of the first footrest relative to the horizontal installation base surface is in the range of 560mm≤d5≤580mm; when the extension device is in the leisure state, the height d5 of the highest point of the first footrest relative to the horizontal installation base surface is in the range of 450mm≤d5≤470mm.

[0012] Furthermore, the stretching device also includes a driving member, and each stretching component also includes a driving rod, which is movably arranged on the base plate, and the driving rod is transmission-connected to the foot support component, and the driving member and the driving rod are drivingly connected to drive the driving rod to move, so that the driving rod drives the base plate to move, so that the stretching device switches back and forth between a sitting state, a leisure state and a lying state; wherein, before the base plate moves forward a first preset distance d1, the driving rod is rotatably arranged around its axis and movably arranged in a horizontal direction, so that the driving rod drives the footrest to move, so that the stretching device switches from a sitting state to a leisure state; before the base plate continues to move forward a second preset distance d2, the driving rod is movably arranged in a horizontal direction to drive the base plate and the backrest to move, so that the stretching device switches from a leisure state to a lying state.

[0013] Furthermore, each extension component also includes a connecting component, which is movably arranged on the supporting iron frame, and the connecting component has a first connecting end, a second connecting end and a third connecting end; the back support component includes a first backrest rod, a second backrest rod and a third backrest rod, and the two ends of the third backrest rod are respectively hinged to the first backrest rod and the second backrest rod; one end of the first backrest rod is hinged to the base plate, and the other end of the first backrest rod is hinged to the backrest member, one end of the second backrest rod is hinged to the third connecting end, and the other end of the second backrest rod is hinged to the backrest member, so that the base plate drives the backrest member to move in a direction toward the supporting iron frame through the first backrest rod, so that the base plate drives the backrest member to move in a direction toward the supporting iron frame through the connecting component and the second backrest rod.

[0014] Furthermore, the backrest member includes a first connecting plate segment, a second connecting plate segment and a third connecting plate segment, the first end of the first connecting plate segment, the first end of the second connecting plate segment and the first end of the third connecting plate segment are connected to each other, the second connecting plate segment and the third connecting plate segment are respectively arranged on opposite sides of the first connecting plate segment, the second end of the second connecting plate segment is hinged to the first backrest rod, and the second end of the third connecting plate segment is hinged to the second backrest rod; and / or, when the extension device is in a lying state, the angle between the side of the second connecting plate segment away from the first connecting plate segment and the side of the first backrest rod close to the first connecting plate segment is α1, and the value range of α1 is; 80°≤α1≤88°.

[0015] Furthermore, each extension component also includes a reinforcement component, which includes a reinforcement piece, a first reinforcement rod and a second reinforcement rod. The two ends of the first reinforcement rod are respectively connected to the supporting iron frame and the first end of the second reinforcement rod. The middle part of the second reinforcement rod is hinged to the connecting component. The second end of the second reinforcement rod is provided with a reinforcement piece. When the extension device is in a lying state, the reinforcement piece is used to abut against the horizontal installation base surface.

[0016] According to another aspect of the present invention, a sofa is provided, comprising a seat frame, a footrest, a backrest cushion and the above-mentioned stretching device.

[0017] By applying the technical solution of the present invention, when the extension device is in a sitting state, the footrest is retracted under the seat frame, and the highest point of the back cushion contacts a preset vertical plane; when the extension device is in a leisure state, relative to when the extension device is in a sitting state, the distances between the footrest and the seat frame in the horizontal and vertical directions increase, so that the footrest is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion and the preset vertical plane is greater than zero; when the extension device is in a lying state, relative to when the extension device is in a leisure state, and the minimum distance between the highest point of the back cushion and the preset vertical plane is equal to zero, the height of the highest point of the foot support component relative to the horizontal mounting base surface is greater than the height of the highest point of the back support component relative to the horizontal mounting base surface degrees, therefore, the user's legs can be roughly level with or slightly higher than the heart, achieving the technical effect of zero gravity. At the same time, since the minimum distance between the highest point of the back cushion and the preset vertical plane is equal to zero when the extension device is in the sitting state and the lying state, the user does not need to reserve an installation gap when installing the sofa. At the same time, since the back cushion does not interfere with the preset vertical plane when the extension device switches between the sitting state, the leisure state and the lying state, the application can achieve the zero-wall arrangement of the sofa, thereby solving the problem in the prior art that the iron frame floor sofa cannot simultaneously meet the customer's requirements for the zero-wall arrangement of the sofa and the zero-gravity comfort experience, so that the sofa can have the advantages of zero-wall arrangement and zero gravity at the same time, and is more convenient to place and more comfortable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of the stretching device (without the reinforcement component) according to the present utility model is shown;

[0020] Figure 2 A schematic structural diagram of an embodiment of the stretching device according to the present invention (excluding the driving member, driving rod, slider, guide rail, first transmission rod, second transmission rod and part of the supporting iron frame) is shown;

[0021] Figure 3 A schematic structural diagram of an embodiment of the stretching device in a sitting position (without the reinforcement component) and a preset vertical plane according to the present invention is shown;

[0022] Figure 4 A schematic structural diagram of an embodiment of the stretching device in a leisure state (without the reinforcement component) and a preset vertical plane according to the present invention is shown;

[0023] Figure 5 A schematic structural diagram of an embodiment of the stretching device in a lying position (without the reinforcement component) and a preset vertical plane according to the present invention is shown;

[0024] Figure 6 A schematic diagram showing the moving distance of the driving rod when the stretching device according to the present invention switches between the sitting state, the leisure state and the lying state.

[0025] The above drawings include the following reference numerals:

[0026] 10. Support frame; 20. Extension assembly; 21. Base plate; 22. Foot support member; 221. Footrest; 2211. First footrest; 2212. Second footrest; 222. First foot support member; 223. Second foot support member; 23. Back support member; 231. Backrest member; 232. Backrest cushion; 30. Drive member; 31. Drive rod; 32. Slider; 33. Guide rail; 34. First transmission rod; 35. Second transmission rod; 40. Connecting parts; 51, first backrest rod; 52, second backrest rod; 521, third backrest rod; 53, first connecting plate section; 54, second connecting plate section; 55, third connecting plate section; 56, first connecting end; 57, second connecting end; 58, third connecting end; 61, reinforcement; 62, first reinforcement rod; 63, second reinforcement rod; 41, first connecting rod; 42, second connecting rod; 43, third connecting rod; 44, fourth connecting plate; 45, fifth connecting rod. DETAILED DESCRIPTION

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0029] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0030] Please refer to Figures 1 to 6The utility model provides a stretching device, comprising: a supporting iron frame 10 and two stretching components 20, the supporting iron frame 10 is arranged on a horizontal installation base, and the two stretching components 20 are respectively arranged on opposite sides of the supporting iron frame 10; each stretching component 20 includes: a base plate 21, a foot support component 22 and a back support component 23, the base plate 21 is used to connect the seat frame of the sofa, the base plate 21 is movably arranged on the supporting iron frame 10, the foot support component 22 and the back support component 23 are both movably connected to the base plate 21, the foot support component 22 includes a footrest 221, the back support component 23 includes a backrest component 231, and the backrest component 231 is used to connect the back cushion 232 of the sofa; the stretching device has a sitting state, a leisure state and a lying state, and the base plate 21 of each stretching component 20 can be movably set to make the stretching device The seat belt is provided so as to be switchable back and forth between a sitting position, a leisure position and a lying position; wherein, when the stretching device is in the sitting position, the footrest 221 is retracted under the seat frame, and the minimum distance between the highest point of the back cushion 232 and a preset vertical plane is equal to zero; when the stretching device is in the leisure position, the footrest 221 is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion 232 and the preset vertical plane is greater than zero; when the stretching device is in the lying position, the back cushion leans back relative to the stretching device in the leisure position, the highest point of the back cushion 232 is lowered, and the minimum distance between the highest point of the back cushion 232 and the preset vertical plane is equal to zero; the height of the highest point of the foot support component 22 relative to the horizontal mounting base surface is greater than the height of the highest point of the back support component 23 relative to the horizontal mounting base surface.

[0031] When the stretching device of the present invention is in a sitting state, the footrest 221 is retracted under the seat frame, and the highest point of the back cushion 232 is in contact with a preset vertical plane; when the stretching device is in a leisure state, relative to when the stretching device is in a sitting state, the distances between the footrest 221 and the seat frame in the horizontal and vertical directions are increased, so that the footrest 221 is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion 232 and the preset vertical plane is greater than zero; when the stretching device is in a lying state, relative to when the stretching device is in a leisure state, and the minimum distance between the highest point of the back cushion 232 and the preset vertical plane is equal to zero, the height of the highest point of the foot support component 22 relative to the horizontal mounting base surface is greater than the height of the highest point of the back support component 23 relative to the horizontal mounting base surface. The height of the mounting base is such that the user's legs can be roughly level with or slightly higher than the heart, achieving the technical effect of zero gravity. At the same time, since the minimum distance between the highest point of the back cushion 232 and the preset vertical plane is equal to zero when the extension device is in a sitting state and a lying state, the user does not need to reserve an installation gap when installing the sofa. At the same time, since the back cushion 232 does not interfere with the preset vertical plane when the extension device switches between a sitting state, a leisure state and a lying state, the application can achieve zero-wall arrangement of the sofa, thereby solving the problem that the iron frame floor-standing sofa in the prior art cannot simultaneously meet the customer's requirements for zero-wall arrangement and zero-gravity comfort experience of the sofa, so that the sofa can have the advantages of zero-wall arrangement and zero gravity at the same time, and is more convenient to place and more comfortable to use.

[0032] Specifically, the preset vertical plane may be a vertical wall, the horizontal installation base may be a horizontal ground, and the footrest 221 is used to connect to the footrest of the sofa, and the user's feet and legs may be placed on the footrest.

[0033] In this embodiment, if Figure 4 and Figure 5 As shown, when the stretching device is in a lying state, the angle θ1 between the upper surface of the footrest 221 and the horizontal mounting base surface is in the range of 10°≤θ1≤12°; when the stretching device is in a leisure state, the angle θ1 between the upper surface of the footrest 221 and the horizontal mounting base surface is in the range of 6°≤θ1≤7°.

[0034] In this embodiment, if Figure 4 and Figure 5As shown, there are two footrests 221, one of the two footrests 221 is the first footrest 2211, and the other of the two footrests 221 is the second footrest 2212, the highest point of the second footrest 2212 is higher than the highest point of the first footrest 2211, and the height of the highest point of the first footrest 2211 relative to the horizontal mounting base surface is greater than the height of the highest point of the backrest member 231 relative to the horizontal mounting base surface; the angle θ1 between the upper surface of the second footrest 2212 and the horizontal mounting base surface has a value range of 10°≤θ1≤12°; when the extension device is in the leisure state, the angle θ1 between the upper surface of the second footrest 2212 and the horizontal mounting base surface has a value range of 6°≤θ1≤7°.

[0035] Specifically, the height of the highest point of the first footrest 2211 relative to the horizontal mounting base is greater than the height of the highest point of the backrest 231 relative to the horizontal mounting base. This arrangement ensures that the user's legs can be roughly level with or slightly higher than the heart, achieving the technical effect of zero gravity.

[0036] Preferably, when the stretching device is in the reclining position, the angle θ1 between the upper surface of the second footrest 2212 and the horizontal mounting base is 12°; when the stretching device is in the resting position, the angle θ1 between the upper surface of the second footrest 2212 and the horizontal mounting base is 7°. This configuration makes the angle of the second footrest 2212 more gradual, and the position of the user's calf or foot is more gentle during use, thereby improving user comfort.

[0037] In this embodiment, if Figures 3 to 5 As shown, when the stretching device is in a lying state, the value range of the angle β1 between the backrest member 231 and the horizontal mounting base is: 15°≤β1≤30°; when the stretching device is in a sitting state, the value range of the angle β1 between the backrest member 231 and the horizontal mounting base is: 55°≤β1≤65°; when the stretching device is in a leisure state, the value range of the angle β1 between the backrest member 231 and the horizontal mounting base is: 58°≤β1≤60°; when the stretching device switches from the sitting state to the lying state, the value range of the change angle δ1 of the angle β1 between the backrest member 231 and the horizontal mounting base is: 25°≤δ1≤50°; wherein, δ1=β1 坐姿 -β1 躺姿 .

[0038] Preferably, when the stretching device is in a lying state, the angle β1 between the backrest member 231 and the horizontal mounting base surface is equal to 24°; when the stretching device is in a sitting state, the angle β1 between the backrest member 231 and the horizontal mounting base surface is equal to 62°; when the stretching device is in a leisure state, the angle β1 between the backrest member 231 and the horizontal mounting base surface is equal to 59°.

[0039] Specifically, such a setting can ensure that the reclining range of the backrest 231 is moderate, which is more in line with the user's body structure, thereby improving the user's comfort.

[0040] In this embodiment, if Figures 3 to 5 As shown, when the stretching device is in a lying state, the range of the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is: 13°≤β2≤19°; when the stretching device is in a sitting state, the range of the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is: 6°≤β2≤10°; when the stretching device is in a leisure state, the range of the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is: 10°≤β2≤13°; in the process of the stretching device switching from a sitting state to a lying state, the range of the change angle δ2 of the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is: 3°≤δ2≤13°.

[0041] Specifically, when the stretching device is in a lying state, the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is equal to 16°; when the stretching device is in a sitting state, the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is equal to 8°; when the stretching device is in a leisure state, the angle β2 between the preset axis on the substrate 21 and the horizontal mounting base surface is equal to 12°.

[0042] Specifically, such a setting makes the angle of the seat frame more gentle, preventing the user's body from being lifted upward too much, thereby improving the user's comfort.

[0043] In this embodiment, if Figure 5As shown, the foot support member 22 includes a first foot support member 222 and a second foot support member 223. One end of the first foot support member 222 and one end of the second foot support member 223 are both hinged to the base plate 21, the other end of the first foot support member 222 is hinged to the first footrest 2211, and the other end of the second foot support member 223 is hinged to the second footrest 2212; wherein, when the extension device is in the lying state and the leisure state, the maximum distance d4 between the first footrest 2211 and the second footrest 2212 has a value range of 2 00mm≤d4≤220mm; the height d6 of the highest point of the second footrest 2212 relative to the horizontal installation base surface is 505mm and 623mm respectively; when the stretching device is in the lying state, the height d5 of the highest point of the first footrest 2211 relative to the horizontal installation base surface is in the range of 560mm≤d5≤580mm; when the stretching device is in the leisure state, the height d5 of the highest point of the first footrest 2211 relative to the horizontal installation base surface is in the range of 450mm≤d5≤470mm.

[0044] Specifically, the footrest pad is arranged on the two footrest parts 221. By setting the maximum distance d4 between the first footrest part 2211 and the second footrest part 2212 to a value range of 200mm≤d4≤220mm, the distance between the first footrest part 2211 and the second footrest part 2212 when unfolded is greater than the distance between the first footrest part 2211 and the second footrest part 2212 when folded. In this way, the overall area of ​​the footrest pad can be lengthened to meet the usage needs of users with longer legs and feet.

[0045] Optionally, when the stretching device is in a lying state, the height d5 of the highest point of the first footrest 2211 relative to the horizontal mounting base surface is in the range of 578 mm, and the height d6 of the highest point of the second footrest 2212 relative to the horizontal mounting base surface is 623 mm; when the stretching device is in the leisure state, the height d5 of the highest point of the first footrest 2211 relative to the horizontal mounting base surface is in the range of 461 mm, and the height d6 of the highest point of the second footrest 2212 relative to the horizontal mounting base surface is 505 mm.

[0046] In this embodiment, if Figure 6As shown, the stretching device also includes a driving member 30, and each stretching component 20 also includes a driving rod 31, which is movably arranged on the base plate 21, and the driving rod 31 is transmission-connected to the footrest 221. The driving member 30 and the driving rod 31 are drivingly connected to drive the driving rod 31 to move, so that the driving rod 31 drives the base plate 21 to move, so that the stretching device switches back and forth between the sitting state, the leisure state and the lying state; wherein, before the base plate 21 moves forward a first preset distance d1, the driving rod 31 is rotatably arranged around its axis and movably arranged in the horizontal direction, so that the driving rod 31 drives the footrest 221 to move, so that the stretching device switches from the sitting state to the leisure state; before the base plate 21 continues to move forward a second preset distance d2, the driving rod 31 is movably arranged in the horizontal direction to drive the base plate 21 and the backrest 231 to move, so that the stretching device switches from the leisure state to the lying state.

[0047] Specifically, the driving member 30 is used to drive the driving rod 31 to move, and the driving rod 31 is used to drive the footrest 221 and the base plate 21 to move, so that the extension device can smoothly switch between the sitting state, the leisure state, and the reclining state. The driving member 30 drives the driving rod 31 to rotate about its axis and move horizontally, so that the driving rod 31 drives the footrest 221 to move, and at the same time, the driving rod 31 drives the base plate 21 to move forward a first preset distance d1. At this time, the extension device switches from the sitting state to the leisure state. Thereafter, the driving rod 31 cannot rotate any further and can only drive the base plate 21 to continue to move forward horizontally by a second preset distance d2. At this time, the extension device switches from the leisure state to the reclining state.

[0048] Specifically, the cross section of the driving rod 31 along the axial direction perpendicular to the driving rod 31 is rectangular or polygonal. Figure 6 As shown in the figure, A shows the position of the driving rod 31 when the stretching device is in a sitting state, B shows the position of the driving rod 31 when the stretching device is in a leisure state, and C shows the position of the driving rod 31 when the stretching device is in a lying state. The first preset distance d1 is 117.04 mm, and the second preset distance d2 is 155.82 mm.

[0049] In this embodiment, if Figure 1 As shown, the stretching device also includes a slider 32 and a guide rail 33. The guide rail 33 is arranged on the supporting iron frame 10, and the guide rail 33 extends in the horizontal direction. The slider 32 is movably mounted on the guide rail 33. The driving member 30 and the slider 32 are driven and connected, and the slider 32 and the driving rod 31 are transmission-connected so that the slider 32 drives the driving rod 31 to move.

[0050] Specifically, if Figure 1As shown, each extension assembly 20 also includes a first transmission rod 34 and a second transmission rod 35, one end of the first transmission rod 34 is connected to the slider 32, the other end of the first transmission rod 34 is hinged to one end of the second transmission rod 35, and the other end of the second transmission rod 35 is hinged to the driving rod 31, so as to drive the driving rod 31 to move through the movement of the slider 32.

[0051] In this embodiment, if Figure 2 and Figure 3 As shown, each extension component 20 also includes a connecting component 40, which is movably arranged on the supporting iron frame 10, and the connecting component 40 has a first connecting end 56, a second connecting end 57 and a third connecting end 58; the back support component 23 includes a first backrest rod 51, a second backrest rod 52 and a third backrest rod 521, and the two ends of the third backrest rod 521 are respectively hinged to the first backrest rod 51 and the second backrest rod 52; one end of the first backrest rod 51 is hinged to the base plate 21, and the other end of the first backrest rod 51 is hinged to the backrest member 231, one end of the second backrest rod 52 is hinged to the third connecting end 58, and the other end of the second backrest rod 52 is hinged to the backrest member 231, so that the base plate 21 drives the backrest member 231 to move in a direction toward the supporting iron frame 10 through the first backrest rod 51, so that the base plate 21 drives the backrest member 231 to move in a direction toward the supporting iron frame 10 through the connecting component 40 and the second backrest rod 52.

[0052] Specifically, the first backrest rod 51 is used to transmit and connect the base plate 21 and the backrest part 231, so that the base plate 21 can drive the backrest part 231 to move; the second backrest rod 52 is used to transmit and connect the backrest part 231 and the connecting part 40, so that the connecting part 40 can drive the backrest part 231 to move, and then the base plate 21 can drive the backrest part 231 to move; the first backrest rod 51 and the second backrest rod 52 jointly ensure the reliability of the transmission connection between the base plate 21 and the backrest part 231, and ensure that the extension device can smoothly switch from the leisure state to the lying state.

[0053] In this embodiment, if Figure 1 and Figure 2As shown, the backrest member 231 includes a first connecting plate segment 53, a second connecting plate segment 54 and a third connecting plate segment 55, the first end of the first connecting plate segment 53, the first end of the second connecting plate segment 54 and the first end of the third connecting plate segment 55 are connected to each other, the second connecting plate segment 54 and the third connecting plate segment 55 are respectively arranged on opposite sides of the first connecting plate segment 53, the second end of the second connecting plate segment 54 is hinged to the first backrest rod 51, and the second end of the third connecting plate segment 55 is hinged to the second backrest rod 52; and / or, when the extension device is in a lying state, the angle between the side of the second connecting plate segment 54 away from the first connecting plate segment 53 and the side of the first backrest rod 51 close to the first connecting plate segment 53 is α1, and the value range of α1 is; 80°≤α1≤88°.

[0054] Specifically, the value range of α1 is; 80°≤α1≤88°. Such a setting can avoid the backrest 231 from having to rotate a large angle before it can be smoothly tipped over, and thus can avoid the stretching device taking a long time to switch from a leisure state to a lying state, which helps to ensure the smooth operation of the stretching device of the present application and improve the user's comfort.

[0055] In this embodiment, if Figure 2 As shown, each extension component 20 also includes a reinforcement component, which includes a reinforcement piece 61, a first reinforcement rod 62 and a second reinforcement rod 63. The two ends of the first reinforcement rod 62 are respectively connected to the supporting iron frame 10 and the first end of the second reinforcement rod 63. The middle part of the second reinforcement rod 63 is hinged to the connecting component 40. The second end of the second reinforcement rod 63 is provided with a reinforcement piece 61. When the extension device is in a lying state, the reinforcement piece 61 is used to abut against the horizontal installation base surface.

[0056] Specifically, if Figure 2 As shown, the connecting component 40 includes a first connecting rod 41, a second connecting rod 42, a third connecting rod 43, a fourth connecting plate 44 and a fifth connecting rod 45. The fourth connecting plate 44 is an irregular structure and has four different connecting ends. One end of the first connecting rod 41 is hinged to the support iron frame 10, and the other end of the first connecting rod 41 is hinged to one end of the second connecting rod 42, and the other end of the second connecting rod 42 forms a first connecting end 56; one end of the third connecting rod 43 is hinged to the middle of the second connecting rod 42, and the other end of the third connecting rod 43 is hinged to one connecting end of the fourth connecting plate 44; the two connecting ends of the fourth connecting plate 44 respectively form a second connecting end 57 and a third connecting end 58, one connecting end of the fourth connecting plate 44 is hinged to one end of the fifth connecting rod 45, and the other end of the fifth connecting rod 45 is hinged to the support iron frame 10.

[0057] Specifically, the base plate 21 drives the connecting component 40 to move, and the connecting component 40 drives the second reinforcing rod 63 and the first reinforcing rod 62 to move and unfold, so that the reinforcement 61 moves in a direction away from the preset vertical plane until the reinforcement 61 and the horizontal mounting base abut against each other to support the extension device of the present application. This is equivalent to increasing the support range of the support iron frame 10, which can reduce the risk of forward tilting caused by the forward movement of gravity when the extension device is in a lying state, and helps to prevent the extension device from tipping over. Among them, when the extension device is in a sitting state, the first reinforcing rod 62 and the second reinforcing rod 63 are retracted under the seat frame, and the reinforcement 61 is also retracted under the seat frame, preventing the reinforcement 61, the first reinforcing rod 62 and the second reinforcing rod 63 from being exposed, thereby ensuring the aesthetics of the sofa.

[0058] Specifically, the middle portion of the second reinforcing rod 63 is hinged to the middle portion of the first connecting rod 41 ; the reinforcing member 61 is a supporting wheel.

[0059] The present invention also provides a sofa, comprising a seat frame, a footrest, a backrest cushion 232 and the above-mentioned stretching device.

[0060] In specific implementation, when the stretching device is in a sitting state, the angle θ2 between the backrest member 231 and the preset axis on the base plate 21 is 109°, and the distance h1 between the highest point of the backrest cushion 232 and the horizontal installation base surface is 915mm; when the stretching device is in a leisure state, the angle θ2 between the backrest member 231 and the preset axis on the base plate 21 is 109°, the lifting height d6 of the highest point of the second footrest member 2212 and the horizontal installation base surface is 505mm, and the lifting height d7 of the highest point of the second footrest member 2212 and the horizontal installation base surface is 505mm. The minimum distance d7 of the plate 21 in the horizontal direction is 504 mm. When the extension device is in a lying state, the angle θ2 between the backrest 231 and the preset axis on the base plate 21 is 140°, the lifting height d6 between the highest point of the second footrest 2212 and the horizontal mounting base surface is 623 mm, the distance h1 between the highest point of the backrest cushion 232 and the horizontal mounting base surface is 624 mm, and the minimum distance d7 between the highest point of the second footrest 2212 and the base plate 21 in the horizontal direction is 485 mm.

[0061] Specifically, by limiting the range of the angle between the backrest 231 and the preset axis on the base plate 21, the degree of proximity of the user's back and legs can be limited, preventing the user's back and legs from being too close, causing the user's body to bend excessively, affecting the user experience, and also preventing the user's legs from being lifted at too small an angle, affecting the user's zero-gravity experience; by limiting the highest point of the second footrest 2212 and the lifting height of the horizontal mounting base, it can be ensured that the user's legs are only slightly higher than the heart, while satisfying the user's zero-gravity experience and avoiding discomfort caused by inverted legs; by limiting the distance between the highest point of the backrest cushion 232 and the horizontal mounting base, it can be avoided that the user's heart height is too high or too low, thereby ensuring that the user's legs are only slightly higher than the heart, thereby ensuring the user's comfort.

[0062] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0063] The sofa of the present invention combines the three elements of the iron frame on the ground, zero gravity and zero leaning against the wall, so that the sofa can have the advantages of zero leaning against the wall and zero gravity at the same time, which is more convenient to place and more comfortable to use; the extension device of the present application has a simple structure and lower production cost; the extension device of the present application operates smoothly.

[0064] When the stretching device of the present invention is in a sitting state, the footrest 221 is retracted under the seat frame, and the highest point of the back cushion 232 is in contact with a preset vertical plane; when the stretching device is in a leisure state, relative to when the stretching device is in a sitting state, the distances between the footrest 221 and the seat frame in the horizontal and vertical directions are increased, so that the footrest 221 is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion 232 and the preset vertical plane is greater than zero; when the stretching device is in a lying state, relative to when the stretching device is in a leisure state, and the minimum distance between the highest point of the back cushion 232 and the preset vertical plane is equal to zero, the height of the highest point of the foot support component 22 relative to the horizontal mounting base surface is greater than the height of the highest point of the back support component 23 relative to the horizontal mounting base surface. The height of the mounting base is such that the user's legs can be roughly level with or slightly higher than the heart, achieving the technical effect of zero gravity. At the same time, since the minimum distance between the highest point of the back cushion 232 and the preset vertical plane is equal to zero when the extension device is in a sitting state and a lying state, the user does not need to reserve an installation gap when installing the sofa. At the same time, since the back cushion 232 does not interfere with the preset vertical plane when the extension device switches between a sitting state, a leisure state and a lying state, the application can achieve zero-wall arrangement of the sofa, thereby solving the problem that the iron frame floor-standing sofa in the prior art cannot simultaneously meet the customer's requirements for zero-wall arrangement and zero-gravity comfort experience of the sofa, so that the sofa can have the advantages of zero-wall arrangement and zero gravity at the same time, and is more convenient to place and more comfortable to use.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A stretching device, characterized in that: include: A supporting iron frame (10) and two extension assemblies (20), wherein the supporting iron frame (10) is arranged on a horizontal installation base surface, and the two extension assemblies (20) are respectively arranged on opposite sides of the supporting iron frame (10); Each of the extension components (20) comprises: a base plate (21), a foot support component (22) and a back support component (23); the base plate (21) is used to connect to the seat frame of the sofa; the base plate (21) is movably arranged on the support iron frame (10); the foot support component (22) and the back support component (23) are both movably connected to the base plate (21); the foot support component (22) comprises a footrest component (221); the back support component (23) comprises a backrest component (231); and the backrest component (231) is used to connect to the back cushion (232) of the sofa; The stretching device has a sitting state, a leisure state and a lying state, and the base plate (21) of each stretching assembly (20) can be movably arranged so that the stretching device can be reciprocally switched between the sitting state, the leisure state and the lying state; Wherein, when the stretching device is in the sitting state, the footrest (221) is retracted under the seat frame, and the minimum distance between the highest point of the back cushion (232) and the preset vertical plane is equal to zero; when the stretching device is in the leisure state, the footrest (221) is extended to the front of the seat frame and tilted relative to the horizontal direction, and the distance between the highest point of the back cushion (232) and the preset vertical plane is greater than zero; when the stretching device is in the lying state, the highest point of the back cushion (232) is lowered relative to the stretching device in the leisure state, and the minimum distance between the highest point of the back cushion (232) and the preset vertical plane is equal to zero; The height of the highest point of the foot support component (22) relative to the horizontal installation base surface is greater than the height of the highest point of the back support component (23) relative to the horizontal installation base surface.

2. The stretching device according to claim 1, characterized in that When the stretching device is in the lying state, the angle θ1 between the upper surface of the footrest (221) and the horizontal installation base surface has a value range of 10°≤θ1≤12°; when the stretching device is in the leisure state, the angle θ1 between the upper surface of the footrest (221) and the horizontal installation base surface has a value range of 6°≤θ1≤7°.

3. The stretching device according to claim 2, characterized in that There are two footrests (221), one of the two footrests (221) is a first footrest (2211), and the other of the two footrests (221) is a second footrest (2212), the highest point of the second footrest (2212) is higher than the highest point of the first footrest (2211), and the height of the highest point of the first footrest (2211) relative to the horizontal installation base is greater than the height of the highest point of the backrest (231) relative to the horizontal installation base; the value range of the angle θ1 between the upper surface of the second footrest (2212) and the horizontal installation base is 10°≤θ1≤12°; when the stretching device is in the leisure state, the value range of the angle θ1 between the upper surface of the second footrest (2212) and the horizontal installation base is 6°≤θ1≤7°.

4. The stretching device according to claim 1, characterized in that When the stretching device is in the lying state, the value range of the angle β1 between the backrest member (231) and the horizontal installation base surface is: 15°≤β1≤30°; when the stretching device switches from the sitting state to the lying state, the value range of the change angle δ1 of the angle β1 between the backrest member (231) and the horizontal installation base surface is: 25°≤δ1≤50°; wherein δ1=β1 坐姿 -β1 躺姿 .

5. The stretching device according to claim 1, characterized in that When the stretching device is in the lying state, the value range of the angle β2 between the preset axis on the substrate (21) and the horizontal mounting base surface is: 13°≤β2≤19°; when the stretching device is in the sitting state, the value range of the angle β2 between the preset axis on the substrate (21) and the horizontal mounting base surface is: 6°≤β2≤10°; when the stretching device is in the leisure state, the value range of the angle β2 between the preset axis on the substrate (21) and the horizontal mounting base surface is: 10°≤β2≤13°; in the process of the stretching device switching from the sitting state to the lying state, the value range of the change angle δ2 of the angle β2 between the preset axis on the substrate (21) and the horizontal mounting base surface is: 3°≤δ2≤13°.

6. The stretching device according to claim 3, characterized in that The foot support component (22) comprises a first foot support component (222) and a second foot support component (223); one end of the first foot support component (222) and one end of the second foot support component (223) are both hinged to the base plate (21); the other end of the first foot support component (222) is hinged to the first footrest component (2211); the other end of the second foot support component (223) is hinged to the second footrest component (2212); wherein, when the stretching device is in the lying state and the leisure state respectively, the first footrest component The maximum distance d4 between the first footrest (2211) and the second footrest (2212) is in the range of 200mm≤d4≤220mm; when the stretching device is in the lying state, the height d5 of the highest point of the first footrest (2211) relative to the horizontal installation base surface is in the range of 560mm≤d5≤580mm; when the stretching device is in the leisure state, the height d5 of the highest point of the first footrest (2211) relative to the horizontal installation base surface is in the range of 450mm≤d5≤470mm.

7. The stretching device according to claim 1, characterized in that The stretching device further comprises a driving member (30), and each of the stretching components (20) further comprises a driving rod (31), wherein the driving rod (31) is movably arranged on the base plate (21), the driving rod (31) and the foot support component (22) are in driving connection, and the driving member (30) and the driving rod (31) are in driving connection to drive the driving rod (31) to move, so that the driving rod (31) drives the base plate (21) to move, so that the stretching device switches back and forth between the sitting state, the leisure state and the lying state; wherein, when the base plate ( 21) before moving forward a first preset distance d1, the driving rod (31) is rotatably arranged around its axis and movably arranged along the horizontal direction, so that the driving rod (31) drives the footrest (221) to move, so that the stretching device switches from the sitting state to the leisure state; before the base plate (21) continues to move forward a second preset distance d2, the driving rod (31) is movably arranged along the horizontal direction to drive the base plate (21) and the backrest (231) to move, so that the stretching device switches from the leisure state to the lying state.

8. The stretching device according to claim 1, characterized in that Each of the extension assemblies (20) further comprises a connecting component (40), the connecting component (40) being movably arranged on the supporting iron frame (10), the connecting component (40) having a first connecting end (56), a second connecting end (57) and a third connecting end (58); the back support component (23) comprises a first backrest rod (51), a second backrest rod (52) and a third backrest rod (521), the two ends of the third backrest rod (521) being hinged to the first backrest rod (51) and the second backrest rod (52) respectively; one end of the first backrest rod (51) is hinged to the base plate (21), The other end of the first backrest rod (51) is hinged to the backrest member (231), one end of the second backrest rod (52) is hinged to the third connecting end (58), and the other end of the second backrest rod (52) is hinged to the backrest member (231), so that the base plate (21) drives the backrest member (231) to move in a direction toward the support iron frame (10) through the first backrest rod (51), so that the base plate (21) drives the backrest member (231) to move in a direction toward the support iron frame (10) through the connecting component (40) and the second backrest rod (52).

9. The stretching device according to claim 8, characterized in that The backrest member (231) comprises a first connecting plate segment (53), a second connecting plate segment (54) and a third connecting plate segment (55); the first end of the first connecting plate segment (53), the first end of the second connecting plate segment (54) and the first end of the third connecting plate segment (55) are connected to each other; the second connecting plate segment (54) and the third connecting plate segment (55) are respectively arranged on opposite sides of the first connecting plate segment (53); the second end of the second connecting plate segment (54) is hinged to the first backrest rod (51); and the second end of the third connecting plate segment (55) is hinged to the second backrest rod (52); and / or When the stretching device is in the lying state, the angle between the side of the second connecting plate segment (54) away from the first connecting plate segment (53) and the side of the first backrest rod (51) close to the first connecting plate segment (53) is α1, and the value range of α1 is; 80°≤α1≤88°.

10. The stretching device according to claim 8, characterized in that Each of the extension components (20) further includes a reinforcing component, which includes a reinforcing piece (61), a first reinforcing rod (62) and a second reinforcing rod (63). The two ends of the first reinforcing rod (62) are respectively connected to the supporting iron frame (10) and the first end of the second reinforcing rod (63). The middle part of the second reinforcing rod (63) is hinged to the connecting component (40). The second end of the second reinforcing rod (63) is provided with the reinforcing piece (61). When the extension device is in the lying state, the reinforcing piece (61) is used to abut against the horizontal installation base surface.

11. A sofa, characterized in that: The utility model comprises a seat frame, a footrest, a backrest cushion (232) and the stretching device according to any one of claims 1 to 10.

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