Stretching device and sofa

Abstract

The utility model 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] This application relates to the field of sofa technology, and more particularly to an extension device and a sofa. Background Technology

[0002] In existing sofa designs, most sofas are equipped with footrests to support the user's legs and feet. However, the large and small footrests on existing sofas are usually located on the same plane and parallel to the bottom of the sofa. Due to this design, when users use the sofa in a TV-like position, their legs often cannot be fully straightened, and they need to bend their legs, which may cause discomfort. Especially for users who lie down for long periods of time, their legs and feet cannot be fully stretched, easily leading to fatigue or discomfort, thus affecting the user's comfort and rest quality.

[0003] Therefore, it is necessary to design an extension device and sofa that solves the above-mentioned technical problems. Utility Model Content

[0004] This application provides an extension device and sofa that can improve user comfort.

[0005] According to a first aspect of the embodiments of this specification, an extension device is provided, including a small footrest assembly, a large footrest assembly, and a footrest extension assembly, wherein the small footrest assembly is rotatably connected to the large footrest assembly, the large footrest assembly is rotatably connected to the footrest extension assembly, and the small footrest assembly is rotatably connected to the large footrest assembly; when the extension device is in a TV posture state, the small footrest assembly is located above the large footrest assembly.

[0006] Furthermore, 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.

[0007] Furthermore, the small footrest link includes a first connecting part connected to the small footrest plate and a second connecting part connected to the large footrest assembly, wherein the first connecting part and the second connecting part form an obtuse angle.

[0008] Furthermore, when the extension device is in the TV posture state, along the first direction, the first connecting part extends away from the large footrest assembly, and the angle between the first connecting part and the horizontal plane is α, where α ranges from 25° to 35°.

[0009] Furthermore, the included angle between the first connecting part and the second connecting part is b, and the range of b is 100°-110°;

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

[0011] Furthermore, 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 placed between the two.

[0012] Furthermore, in the lying position, the large footrest forms an angle c with the horizontal ground, the angle c ranging from 10° to 15°, and the small footrest forms an angle d with the horizontal ground, the angle d ranging from 12° to 17°; the angle c is smaller than the angle d.

[0013] Furthermore, the footrest extension assembly includes a first link, a second link, a third link, and a fourth link. The two ends of the first link are respectively connected to the large footrest and the second link; the two ends of the third link are respectively connected to the large footrest, the fourth link, and the small footrest extension link; and the first link is connected to the fourth link.

[0014] Furthermore, the third link bends inward toward the inside of the first link; the third link and the first link partially overlap.

[0015] Furthermore, it also includes a drive assembly, which includes a drive member, a first extension link, and a second extension link; the two ends of the first extension link are respectively connected to the drive member and the second extension link, and the second extension link is connected to the middle of the fourth link.

[0016] According to a second aspect of the embodiments of this 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, wherein 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] Furthermore, in the lying position, the horizontal plane where the highest point of the small footrest component is located is above the horizontal plane where the highest point of the backrest component is located.

[0018] This application has the following beneficial effects: In the TV posture, by placing the small footrest component above the large footrest component, the user's feet can be lifted upwards, straightening the legs and improving user comfort.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0021] Figure 1 This is a front view of the sofa in the seated position.

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

[0023] Figure 3 This is a front view of the sofa in the reclining position.

[0024] Figure 4 This is a partial perspective view of the extension component of this application;

[0025] Figure 5 This is a structural schematic diagram of the small foot support linkage of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10-Small footrest assembly; 11-Small footrest plate; 111-First support part; 112-Second support part; 12-Small footrest connecting rod; 121-First connecting part; 122-Second connecting part; 13-Small footrest extension connecting rod; 131-Support block;

[0028] 20 - Large footrest assembly; 21 - Large footrest plate; 22 - Large footrest connecting rod;

[0029] 30 - Footrest extension assembly; 31 - First link; 32 - Second link; 33 - Third link; 34 - Fourth link;

[0030] 40 - Drive assembly; 41 - Drive element; 42 - First extension link; 43 - Second extension link;

[0031] 50 - Base;

[0032] 60 - Suspension assembly;

[0033] 70 - Seat frame assembly;

[0034] 80 - Backrest assembly. Detailed Implementation

[0035] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0037] The embodiments described in this specification will now be described in detail.

[0038] Reference Figure 1-5 As shown, this application discloses an extension device, which includes a small footrest assembly 10, a large footrest assembly 20, a footrest extension assembly 30, and a drive 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 extension assembly 30, and the drive assembly 40 is rotatably connected to the footrest extension assembly 30, thereby driving the footrest extension assembly 30 to unfold. When the large footrest assembly 20 unfolds, it also drives the small footrest assembly 10 and the large footrest assembly 20 to unfold.

[0039] When the extension device is in the TV position, the small footrest assembly 10 is located above the large footrest assembly 20. Specifically, the horizontal plane at the highest point of the small footrest assembly 10 is the first plane, and the horizontal plane at the highest point of the large footrest assembly 20 is the second plane, wherein when the seat is placed on the ground, the aforementioned reference horizontal plane is the ground.

[0040] When the seat is in the TV position, the first plane is above the second plane. In this way, the height of the third plane relative to the fourth plane can be used to place the heel, and the small footrest that supports the user's heel can raise the heel, straightening the gap between the heel and the calf, thus improving the user's sitting comfort.

[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] The first support part 111 and the second support part 112 form an obtuse angle, thereby raising the first support part 111 away from the ground, and controlling the height difference between the first plane and the second plane, so as to raise the user's heel placed on the main support plate 11.

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

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

[0045] The included angle between the first connecting part 121 and the second connecting part 122 is b, and b ranges from 100° to 110°. Furthermore, the length of the first connecting part 121 is greater than the length of the second connecting part 122. Thus, the small support plate 11 fixed to the first connecting part 121 can be positioned away from the small footrest link 12, avoiding interference between their movements while ensuring sufficient distance between the heel and lower leg, allowing the user to better support themselves on the small footrest assembly 10 and the large footrest assembly 20.

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

[0047] The large footrest assembly 20 includes a large footrest board 21 and a large footrest connecting rod 22. The two ends of the large footrest connecting rod 22 are connected to the large footrest board 21 and the small footrest connecting rod 12, respectively. The middle portion of the small footrest connecting rod 12 is bent inwards, and the space formed by the bend accommodates the large footrest connecting rod 22, placing the large footrest connecting rod 22 between the large footrest board 21 and the small footrest connecting rod 12. The "inner side" mentioned above refers to the inner side of the sofa.

[0048] In a lying position, the large footrest 21 forms an angle c with the horizontal ground, with an angle range of 10°-15°, while the small footrest 11 forms an angle d with the horizontal ground, with an angle range of 12°-17°. Angle c is smaller than angle d; the larger angle d allows the feet to be properly elevated, enabling a natural transition between the legs and feet, thereby improving comfort.

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

[0050] The third link 33 bends inward toward the first link 31 and is set in a V-shape with an obtuse angle. The third link 33 and the first link 31 partially overlap, making the overall structure of the footrest extension assembly 30 more compact. At the same time, it can also cover the third link 33, improve the appearance design of the extension assembly, and enhance the overall aesthetics and neatness of the product.

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

[0052] This application introduces a small footrest component 10, which has a simple structure, fewer parts, and low production and processing costs, while providing foot support for the user. Furthermore, when the extension device is in a lying position, the small footrest component 10 is located above the large footrest component 20, allowing the user's feet to be lifted upwards, straightening the leg and improving user comfort.

[0053] The connecting rods in the small foot rest assembly 10, large foot rest assembly 20, foot rest extension assembly 30, and drive assembly 40 of this application are provided with bends. These bends not only make the structure more compact but also help distribute stress, preventing localized stress concentration and improving the stability and strength of the extension device. Furthermore, multiple arc-shaped clearance grooves are formed on the connecting rods of the aforementioned assemblies.

[0054] This 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 connected to the base 50 and the seat frame assembly 70, respectively, and the backrest assembly 80 and the extension device are connected to the front and rear ends of the seat frame assembly 70, respectively. A second link 32 and a fourth link 34 are connected to the seat frame assembly 70, so that when the extension device moves forward, it can drive the seat frame assembly 70 to move synchronously.

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

[0056] In a reclining position, the horizontal plane where the highest point of the small footrest assembly 10 is located is diagonally above and in 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 a zero-gravity state and is in the most comfortable posture.

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

Claims

1. A stretching device characterized by, 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 position, the small footrest assembly is located above the large footrest assembly.

2. The extension device according to claim 1, characterized in that, 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, characterized in that, The small footrest link includes a first connecting part connected to the small footrest plate and a second connecting part connected to the large footrest assembly, with the first connecting part and the second connecting part forming an obtuse angle.

4. The extension device according to claim 3, characterized in that, When the extension device is in the TV posture state, along the first direction, the first connecting part extends away from the large footrest assembly, and the angle between the first connecting part and the horizontal plane is α, where α ranges from 25° to 35°.

5. The extension device according to claim 3, characterized in that, The included angle between the first connecting part and the second connecting part is b, and the range of b is 100°-110°. The length of the first connecting part is greater than the length of the second connecting part.

6. The extension device according to claim 2, characterized in that, The small footrest includes a first support part and a second support part, and the connection point between the first support part and the second support part is connected to the small footrest connecting rod; the first support part and the second support part form an obtuse angle.

7. The extension device according to claim 2, characterized in that, 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 placed between the two.

8. The extension device according to claim 7, characterized in that, In the lying position, the large footrest forms an angle c with the horizontal ground, the angle c ranging from 10° to 15°, and the small footrest forms an angle d with the horizontal ground, the angle d ranging from 12° to 17°; the angle c is smaller than the angle d.

9. The extension device according to claim 7, characterized in that, The footrest extension assembly includes a first link, a second link, a third link, and a fourth link. The two ends of the first link are respectively connected to the large footrest and the second link; the two ends of the third link are respectively connected to the large footrest, the fourth link, and the small footrest extension link; the first link is connected to the fourth link.

10. The extension device according to claim 9, characterized in that, The third link bends inward toward the first link; the third link and the first link partially overlap.

11. The extension device according to claim 9, characterized in that, It also includes a drive assembly, which includes a drive member, a first extension link and a second extension link; the two ends of the first extension link are respectively connected to the drive 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 The device includes a base, a suspension assembly, a seat frame assembly, a backrest assembly, and an extension device according to any one of claims 1-11, wherein 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, characterized in that, In a lying position, 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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