Stretching device and sofa

Abstract

The invention provides a stretching device and a sofa. The stretching device comprises a small footrest assembly, a large footrest assembly and a footrest stretching assembly. The small footrest assembly is rotationally connected to the large footrest assembly, and the large footrest assembly is rotationally connected to the footrest stretching assembly. When the stretching device is in the TV posture state, the small footrest assembly is located above the large footrest assembly, then the feet of the user can be lifted upwards, the feet and the legs are straightened, and the comfort level of the user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sofas, and particularly to a stretching device and a sofa. Background Art

[0002] In the existing sofa designs, most sofas are equipped with a footrest function for supporting the user's legs and feet. However, in the existing sofas, the large footrest and the small footrest are usually on the same plane and parallel to the bottom surface of the sofa. Due to this design of the footrest, when the user uses the sofa in the TV position, the feet often cannot be fully straightened and the legs need to be bent, which may cause discomfort. Especially for users who lie down for a long time, the feet and legs cannot be fully stretched, easily resulting in a sense of fatigue or discomfort, thus affecting the comfort and rest quality of the user.

[0003] Therefore, it is necessary to design a stretching device and a sofa to solve the above technical problems. Summary of the Invention

[0004] The present application provides a stretching device and a sofa, which can improve the comfort of the user.

[0005] According to the first aspect of the embodiments of the present specification, a stretching device is provided, including a small footrest component, a large footrest component and a footrest stretching component. The small footrest component is rotatably connected to the large footrest component, the large footrest component is rotatably connected to the footrest stretching component, and the small footrest component is rotatably connected to the large footrest component; when the stretching device is in the TV position, the small footrest component is located above the large footrest component.

[0006] Further, the small footrest component includes a small footrest board, a small footrest link and a small footrest extension link; two ends of the small footrest link are respectively connected to the middle of the small footrest board and the large footrest component, and two ends of the small footrest extension link are respectively connected to the small footrest board and the footrest stretching component.

[0007] Further, the small footrest link includes a first connection portion connected to the small footrest board and a second connection portion connected to the large footrest component, and an obtuse angle is formed between the first connection portion and the second connection portion.

[0008] Further, when the stretching device is in the TV position, along a first direction, the first connection portion extends away from the large footrest component, and the angle between the first connection portion and the horizontal plane is a, and the range of a is 25° - 35°.

[0009] Further, the angle between the first connection portion and the second connection portion is b, and the range of b is 100° - 110°;

[0010] The length of the first connecting part is greater than that of the second connecting part. Further, the small footrest includes a first supporting part and a second supporting part, and the connecting point of the first supporting part and the second supporting part is connected to the small footrest connecting rod; an obtuse angle is formed between the first supporting part and the second supporting part.

[0011] Further, the large footrest assembly includes a large footrest board and a large footrest connecting rod; both ends of the large footrest connecting rod are respectively connected to the large footrest board and the small footrest connecting rod and are disposed therebetween.

[0012] Further, in the lying posture state, an angle c is formed between the large footrest board and the horizontal ground, and the degree range of the angle c is 10° - 15°, and an angle d is formed between the small footrest board and the horizontal ground, and the degree range of the angle d is 12° - 17°; the angle c is smaller than the angle d.

[0013] Further, the footrest extension assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod. Both ends of the first connecting rod are respectively connected to the large footrest board and the second connecting rod; both ends of the third connecting rod are respectively connected to the large footrest board, the fourth connecting rod and the small footrest extension connecting rod; the first connecting rod is connected to the fourth connecting rod.

[0014] Further, the third connecting rod is bent inwardly toward the first connecting rod; the third connecting rod and the first connecting rod partially overlap.

[0015] Further, a driving assembly is further included, and the driving assembly includes a driving member, a first extension connecting rod and a second extension connecting rod; both ends of the first extension connecting rod are respectively connected to the driving member and the second extension connecting rod, and the second extension connecting rod is connected to the middle part of the fourth connecting rod.

[0016] According to the second aspect of the embodiments of the present specification, a sofa is provided, including a base, a suspension assembly, a seat frame assembly, a backrest assembly and the sofa described in the first aspect above. The suspension assembly is respectively connected to the base and the seat frame assembly, and the backrest assembly and the extension assembly are respectively connected to the front and rear ends of the seat frame assembly.

[0017] Further, in the lying posture state, the horizontal plane where the highest point of the small footrest assembly is located is above the horizontal plane where the highest point of the backrest assembly is located.

[0018] The present application has the following beneficial effects: In the TV posture state, by arranging the small footrest assembly above the large footrest assembly, the user's feet can be lifted upward, so that the feet and legs are straightened, improving the user's comfort.

[0019] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0021] Figure 1 is the front view of the sofa of this application in the sitting position;

[0022] Figure 2 is the front view of the sofa of this application in the TV position;

[0023] Figure 3 is the front view of the sofa of this application in the lying position;

[0024] Figure 4 is the partial perspective view of the stretching assembly of this application;

[0025] Figure 5 is the structural schematic diagram of the small footrest link of this application.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 10 - small footrest assembly; 11 - small footrest board; 111 - first support portion; 112 - second support portion; 12 - small footrest link; 121 - first connection portion; 122 - second connection portion; 13 - small footrest extension link; 131 - support block;

[0028] 20 - large footrest assembly; 21 - large footrest board; 22 - large footrest link;

[0029] 30 - footrest stretching assembly; 31 - first link; 32 - second link; 33 - third link; 34 - fourth link;

[0030] 40 - drive assembly; 41 - drive member; 42 - first stretching link; 43 - second stretching link;

[0031] 50 - base;

[0032] 60 - suspension assembly;

[0033] 70 - seat frame assembly;

[0034] 80 - backrest assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Here, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, lateral, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0037] Next, the embodiments of this specification will be described in detail.

[0038] Referring to Figures 1-5 As shown, the present application discloses a stretching device, which includes a small footrest assembly 10, a large footrest assembly 20, a footrest stretching assembly 30, and a driving assembly 40. The small footrest assembly 10 is rotatably connected to the large footrest assembly 20, the large footrest assembly 20 is rotatably connected to the footrest stretching assembly 30, and the driving assembly 40 is rotatably connected to the footrest stretching assembly 30, thereby driving the footrest stretching assembly 30 to unfold. When the large footrest assembly 20 unfolds, it drives the small footrest assembly 10 and the large footrest assembly 20 to unfold simultaneously.

[0039] When the stretching device is in the TV posture state, the small footrest assembly 10 is located above the large footrest assembly 20. Specifically, the horizontal plane where the highest point of the small footrest assembly 10 is located is the first plane, and the horizontal plane where the highest point of the large footrest assembly 20 is located is the second plane. When the seat is placed on the ground, the above-mentioned reference horizontal plane is the ground.

[0040] When the seat is in the TV posture state, the first plane is located above the second plane. In this way, the height by which the third plane rises compared to the fourth plane can be used to place the heel, and thus the small footrest pad that supports the user's heel can raise the heel, straightening the angle between the heel and the calf, thereby improving the comfort of the user when sitting.

[0041] The small footrest assembly 10 includes a small footrest plate 11, a small footrest connecting rod 12, and a small footrest extension connecting rod 13. The two ends of the small footrest connecting rod 12 are respectively connected to the middle of the small footrest plate 11 and the large footrest assembly 20, and the two ends of the small footrest extension connecting rod 13 are respectively connected to the small footrest plate 11 and the footrest extension assembly 30. A support block 131 is provided on the small footrest extension connecting rod 13. The small footrest plate 11 includes a first support portion 111 and a second support portion 112. The first support portion 111 extends away from the large footrest assembly 20, and the connection point between the first support portion 111 and the second support portion 112 is connected to the small footrest connecting rod 12.

[0042] An obtuse angle is formed between the first support portion 111 and the second support portion 112, thereby lifting the first support portion 111 away from the ground, and controlling the height difference between the first plane and the second plane, facilitating the elevation of the user's heel placed on the main support plate 11.

[0043] The small footrest connecting rod 12 includes a first connection portion 121 connected to the small footrest plate 11 and a second connection portion 122 connected to the large footrest assembly 20. The second connection portion 122 is connected to the large footrest assembly 20.

[0044] When the seat is in the TV position, along the first direction, the first connection portion 121 extends away from the large footrest assembly 20, and the angle between the first connection portion 121 and the horizontal plane is a, and the range of a is 25° - 35°. Thus, the first connection portion 121 extends away from the horizontal plane, increasing the height of the connection point between the first support portion 111 and the second support portion 112, and further increasing the height of the footrest extension assembly 30, ensuring that when the seat is in the TV position, the third plane is above the fourth plane.

[0045] The angle between the first connection portion 121 and the second connection portion 122 is b, and the range of b is 100° - 110°. And the length of the first connection portion 121 is greater than the length of the second connection portion 122. Thus, the small support plate 11 fixed on the first connection portion 121 can be arranged away from the small footrest connecting rod 12, avoiding interference during their movement while meeting the distance between the heel and the calf, enabling the user to better support on the small footrest assembly 10 and the large footrest assembly 20.

[0046] The two ends of the small footrest extension connecting rod 13 are respectively connected to the small support plate 11 and the footrest extension assembly 30. A support block 131 is provided on the small footrest extension connecting rod 13. When the first connection portion 121 abuts against the support block 131, it can help disperse the pressure borne by the small footrest connecting rod 12 and improve the load-bearing capacity of the small footrest assembly 10.

[0047] The large footrest assembly 20 includes a large footrest plate 21 and a large footrest connecting rod 22. The two ends of the large footrest connecting rod 22 are respectively connected to the large footrest plate 21 and the small footrest connecting rod 12. The middle part of the small footrest connecting rod 12 is bent inward, and the formed space is used to accommodate the large footrest connecting rod 22, so that the large footrest connecting rod 22 is placed between the large footrest plate 21 and the small footrest connecting rod 12. The above-mentioned inner side refers to the inner side of the sofa.

[0048] In the lying position, an angle c is formed between the large footrest plate 21 and the horizontal ground, and the degree range of the angle c is 10° - 15°. An angle d is formed between the small footrest plate 11 and the horizontal ground, and the degree range of the angle d is 12° - 17°. The angle c is smaller than the angle d. The larger angle d can appropriately raise the feet, enabling a natural transition between the legs and feet, thereby improving comfort.

[0049] The footrest extension assembly 30 includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, and a fourth connecting rod 34. The two ends of the first connecting rod 31 are respectively connected to the large footrest plate 21 and the second connecting rod 32. One end of the third connecting rod 33 is connected to the fourth connecting rod 34, and the two sides of the other end are respectively connected to the large footrest plate 21 and the small footrest extension connecting rod 13. The first connecting rod 31 is connected to the fourth connecting rod 34.

[0050] The third connecting rod 33 is bent inward towards the first connecting rod 31 and is arranged in a V shape, and the V-shaped structure has an obtuse angle. The third connecting rod 33 and the first connecting rod 31 partially overlap, making the overall structure of the footrest extension assembly 30 more compact. At the same time, it can play a role in shielding the third connecting rod 33, improving the appearance design of the extension assembly, and enhancing the overall aesthetic and neatness of the product.

[0051] The drive assembly 40 includes a drive member 41, a first extension connecting rod 42, and a second extension connecting rod 43. The two ends of the first extension connecting rod 42 are respectively connected to the drive member 41 and the second extension connecting rod 43. The second extension connecting rod 43 is connected to the middle part of the fourth connecting rod 34. The drive member 41 transmits force to the footrest extension assembly 30 through the first extension connecting rod 42 and the second extension connecting rod 43.

[0052] In this application, by adding the small footrest assembly 10, the structure is simple, the number of parts is small, the production and processing costs are low, and it can realize the support of the user's feet. Further, when the extension device is in the lying position, the small footrest assembly 10 is located above the large footrest assembly 20, and the user's feet can be lifted upward, straightening the feet and legs, thereby improving the comfort of the user.

[0053] The connecting rods of the small footrest assembly 10, the large footrest assembly 20, the footrest extension assembly 30, and the drive assembly 40 of the present application are provided with bends. On the one hand, the bends can make the structure more compact, and on the other hand, they help to disperse the force and avoid local stress concentration, thereby improving the stability and strength of the extension device. In addition, a plurality of arc-shaped avoidance grooves are formed on the connecting rods of the above components.

[0054] The present application also discloses a sofa, which includes a base 50, a suspension assembly 60, a seat frame assembly 70, a backrest assembly 80, and an extension device. The suspension assembly 60 is respectively connected to the base 50 and the seat frame assembly 70, and the backrest assembly 80 and the extension device are respectively connected to the front and rear ends of the seat frame assembly 70. The second connecting rod 32 and the fourth connecting rod 34 are respectively connected to the seat frame assembly 70, so that when the extension device moves forward, the seat frame assembly 70 can be driven to move synchronously.

[0055] When the sofa is in the sitting position, TV position, and lying position, the angles formed by the mounting surface of the seat frame assembly 70 and the horizontal direction are 9°, 12°, and 28° respectively.

[0056] In the lying position, the horizontal plane where the highest point of the small footrest assembly 10 is located is obliquely above the front of the horizontal plane where the highest point of the backrest assembly 80 is located. The shortest distance between the highest point of the small footrest assembly 10 and the highest point of the backrest assembly 80 is 122.1 cm. At this time, the sofa is in the zero-gravity state and is in the most comfortable posture.

[0057] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A stretching device, characterized in that, It includes a small footrest assembly, a large footrest assembly and a footrest extension assembly. The small footrest assembly is rotatably connected to the large footrest assembly, and the large footrest assembly is rotatably connected to the footrest extension assembly. When the extension device is in the TV posture state, the small footrest assembly is located above the large footrest assembly.

2. The extension device according to claim 1, wherein the small footrest assembly includes a small footrest plate, a small footrest connecting rod and a small footrest extension connecting rod. The two ends of the small footrest connecting rod are respectively connected to the middle of the small footrest plate and the large footrest assembly, and the two ends of the small footrest extension connecting rod are respectively connected to the small footrest plate and the footrest extension assembly.

3. The extension device according to claim 2, wherein the small footrest connecting rod includes a first connecting portion connected to the small footrest plate and a second connecting portion connected to the large footrest assembly, and an obtuse angle is formed between the first connecting portion and the second connecting portion.

4. The extension device according to claim 3, wherein when the extension device is in the TV posture state, along the first direction, the first connecting portion extends toward the side away from the large footrest assembly, and the angle between the first connecting portion and the horizontal plane is a, and the range of a is 25° - 35°.

5. The extension device according to claim 3, wherein the angle between the first connecting portion and the second connecting portion is b, and the range of b is 100° - 110°; the length of the first connecting portion is greater than the length of the second connecting portion.

6. The extension device according to claim 2, wherein the small footrest plate includes a first support portion and a second support portion, and the connection point between the first support portion and the second support portion is connected to the small footrest connecting rod; an obtuse angle is formed between the first support portion and the second support portion.

7. The extension device according to claim 2, wherein the large footrest assembly includes a large footrest plate and a large footrest connecting rod; the two ends of the large footrest connecting rod are respectively connected to the large footrest plate and the small footrest connecting rod and are disposed therebetween.

8. The extension device according to claim 7, wherein in the lying posture state, an angle c is formed between the large footrest plate and the horizontal ground, and the degree range of the angle c is 10° - 15°, and an angle d is formed between the small footrest plate and the horizontal ground, and the degree range of the angle d is 12° - 17°; the angle c is less than the angle d.

9. The extension device according to claim 7, wherein the footrest extension assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod. The two ends of the first connecting rod are respectively connected to the large footrest plate and the second connecting rod; the two ends of the third connecting rod are respectively connected to the large footrest plate, the fourth connecting rod and the small footrest extension connecting rod; the first connecting rod is connected to the fourth connecting rod.

10. The extension device according to claim 9, wherein the third connecting rod is bent inward toward the first connecting rod; the third connecting rod and the first connecting rod partially overlap.

11. The extension device according to claim 9, wherein It further includes a driving component, and the driving component includes a driving member, a first extension link and a second extension link; two ends of the first extension link are respectively connected to the driving member and the second extension link, and the second extension link is connected to the middle of the fourth link.

12. A sofa, characterized in that, It includes a base, a suspension assembly, a seat frame assembly, a backrest assembly and the extension device according to any one of claims 1-11, the suspension assembly is respectively connected to the base and the seat frame assembly, and the backrest assembly and the extension assembly are respectively connected to the front and rear ends of the seat frame assembly.

13. The sofa according to claim 12, wherein In the lying posture state, the horizontal plane where the highest point of the small footrest assembly (10) is located is above the horizontal plane where the highest point of the backrest assembly (80) is located.

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