Seat

Abstract

The invention provides a seat. The seat comprises a main footrest assembly, an auxiliary footrest assembly and a linkage rod. The horizontal plane where the highest point of the main footrest assembly is located is a first plane, and the horizontal plane where the highest point of the auxiliary footrest assembly is located is a second plane. The linkage rod comprises a first linkage part connected with the main footrest assembly and a second linkage part connected with the auxiliary footrest assembly, and an obtuse included angle is formed between the first linkage part and the second linkage part. When the seat is in the TV posture state, the first plane is located below the second plane. When the seat is in the TV posture state, the first plane is located below the second plane, and then a height difference can be formed between the first plane and the second plane and used for placing heels, the situation that the heels drive shanks to bend upwards is avoided, and the sitting comfort of a user is improved.

Description

Technical Field

[0001] This application relates to the technical field of furniture, and particularly to a seating furniture. Background Art

[0002] In the design of functional seating furniture, the leg rest adjustment, as a key component to enhance the user experience, its structural optimization has always been the focus of industry research. Modern seating furniture generally adopts a multi-stage linkage device to achieve the angle and height adjustment of the leg support surface, so as to meet the comfort requirements in different usage scenarios.

[0003] When the user is in a semi-reclined posture, a specific physiological curvature will be formed between the ankle joint and the tibia. However, during the unfolding process of the two-stage support plates (corresponding to the foot and calf regions respectively) of the existing leg rest system, the phenomenon of mismatched support surface heights often occurs. Especially when the user is wearing shoes or the feet are in a natural bent state, this height difference of the support surface will cause tension in the lower limb muscles.

[0004] Therefore, it is necessary to design a seating furniture that solves the above technical problems. Summary of the Invention

[0005] This application provides a seating furniture that can improve the comfort of the user when sitting.

[0006] According to an embodiment of the present specification, a seating furniture is provided, which includes a main footrest component, a secondary footrest component, and a linkage rod; the horizontal plane where the highest point of the main footrest component is located is the first plane, and the horizontal plane where the highest point of the secondary footrest component is located is the second plane; the linkage rod includes a first linkage portion connected to the main footrest component and a second linkage portion connected to the secondary footrest component, and an obtuse angle is formed between the first linkage portion and the second linkage portion; wherein, when the seating furniture is in the TV posture state, the first plane is located below the second plane.

[0007] Further, when the seating furniture is in the TV posture state, along the first direction, the first linkage portion extends away from the secondary footrest component, and the angle between the first linkage portion and the horizontal plane is a, and the range of a is 10° - 15°.

[0008] Further, the angle between the first linkage portion and the second linkage portion is b, and the range of b is 155° - 165°;

[0009] The length of the first linkage portion is greater than the length of the second linkage portion.

[0010] Further, when the seat is in the lying position, an angle c is formed between the main footrest assembly and the horizontal plane, and the degree range of the angle c is 5° - 20°. An angle d is formed between the auxiliary footrest assembly and the horizontal plane, and the degree range of the angle d is 7° - 23°. The angle c is less than the angle d.

[0011] Further, it further includes an extension assembly. The main footrest assembly includes a main support plate, a linkage rod, and a main extension link. One end of the main support plate is used to support the user's feet, and the other end is connected to one end of the main extension link. The other end of the main extension link is connected to the extension assembly.

[0012] Further, the main support plate includes a first support portion and a second support portion. The connection point between the first support portion and the second support portion is connected to the linkage rod. An obtuse angle is formed between the first support portion and the second support portion.

[0013] Further, the auxiliary footrest assembly includes an auxiliary support plate and an auxiliary link. The two ends of the auxiliary link are respectively connected to the auxiliary support plate and the main extension link and are disposed therebetween.

[0014] Further, the 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 auxiliary support plate and the second link. One end of the third link is connected to the main extension link and the auxiliary support plate, and the other end of the third link is connected to the fourth link. Among them, the middle of the first link is connected to the fourth link.

[0015] Further, the third link is bent toward one side of the first link, and the third link and the first link partially overlap.

[0016] Further, it further includes a drive assembly. The drive assembly 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.

[0017] Further, it further includes a base, a suspension assembly, a seat frame assembly, and a backrest assembly. 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.

[0018] The present application has the following beneficial effects: When the seat of the present application is in the TV position, the first plane is located below the second plane. Furthermore, a height difference can be formed between the first plane and the second plane to place the heel, avoiding the heel driving the calf to bend upward and improving the comfort of the user when sitting.

[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 a schematic structural diagram of the seat of this application in the sitting posture state;

[0022] Figure 2 is a schematic structural diagram of the seat of this application in the TV posture state;

[0023] Figure 3 is a schematic structural diagram of the seat of this application in the lying posture state;

[0024] Figure 4 is a schematic structural diagram of the linkage rod of this application.

[0025] Description of the Reference Numerals in the Drawings:

[0026] 10 - Main footrest assembly; 11 - Main support plate; 111 - First support portion; 112 - Second support portion; 12 - Main extension link; 121 - Support block;

[0027] 20 - Sub - footrest assembly; 21 - Sub - support plate; 22 - Sub - link;

[0028] 30 - Linkage rod; 31 - First linkage portion; 32 - Second linkage portion;

[0029] 40 - Extension assembly; 41 - First link; 42 - Second link; 43 - Third link; 44 - Fourth link;

[0030] 50 - Driving assembly; 51 - Driving member; 52 - First extension link; 53 - Second extension link;

[0031] 60 - Base; 70 - Suspension assembly; 80 - Seat frame assembly; 90 - Backrest assembly. Detailed Embodiments

[0032] Here, the technical solutions in the embodiments (or "embodiment modes") of this application will be clearly and completely described in conjunction with the drawings. When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0033] 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, motion conditions, etc. between components in a specific posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, terms such as "first" and "second" in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0034] Next, the embodiments of this specification will be described in detail.

[0035] Refer to Figures 1-4 As shown, the embodiments of the present application disclose a seating furniture, which includes a main footrest assembly 10, a secondary footrest assembly 20, a linkage rod 30, an extension assembly 40, a drive assembly 50, a base 60, a suspension assembly 70, a seat frame assembly 80, and a backrest assembly 90.

[0036] The main footrest assembly 10 is rotatably connected to the secondary footrest assembly 20 through the linkage rod 30. The secondary footrest assembly 20 is rotatably connected to the extension assembly 40, and the extension assembly 40 is rotatably connected to the drive assembly 50. Thus, when the drive assembly 50 drives the extension assembly 40 to expand, while driving the secondary footrest assembly 20 to expand, the main footrest assembly 10 also expands synchronously, realizing the switching of the seating posture of the seating furniture. The seating furniture in the embodiments of the present application refers to a sofa. In some cases, the seating furniture may also refer to a chair, a stool, etc., which is not specifically limited herein.

[0037] The main footrest assembly 10 includes a main support plate 11 and a main extension link 12. The horizontal plane where the highest point of the main footrest assembly 10 is located is the first plane. When the seating furniture is placed on the ground, the above-mentioned reference horizontal plane is the ground.

[0038] The main support plate 11 includes a first support portion 111 and a second support portion 112. The first support portion 111 extends away from the secondary footrest assembly 20, thereby avoiding collision between the first support portion 111 and the secondary footrest assembly 20 during the contraction process.

[0039] 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 to support the user's heel. The first support portion 111 is substantially parallel to the horizontal plane, and the second support portion 112 is inclined away from the secondary footrest assembly 20.

[0040] Both ends of the main extension link 12 are respectively connected to the main support plate 11 and the extension assembly 40. A support block 121 is provided on the main extension link 12. When the linkage rod 30 abuts against the support block 121, it can help disperse the pressure borne by the linkage rod 30 and improve the load-bearing capacity of the linkage rod 30.

[0041] The secondary footrest assembly 20 includes a secondary support plate 21 and a secondary link 22. The horizontal plane at the highest point of the secondary footrest assembly 20 is the second plane. When the seat is placed on the ground, the above-mentioned reference horizontal plane is the ground. When the seat is in the TV position, the first plane is below the second plane. Thus, a height difference can be formed between the first plane and the second plane to place the heel, thereby preventing the heel from driving the calf to bend upward and improving the comfort of the user when sitting.

[0042] When the seat is in the lying position, an angle c is formed between the main footrest assembly 10 and the horizontal plane, and the degree range of the angle c is 5° - 20°. An angle d is formed between the secondary footrest assembly 20 and the horizontal plane, and the degree range of the angle d is 7° - 23°. The angle c is less than the angle d.

[0043] Both ends of the secondary link 22 are respectively connected to the secondary support plate 21 and the linkage rod 30. The middle part of the main extension link 12 is bent inward toward the seat, and the space formed by the bending is used to accommodate the secondary link 22, so that the secondary link 22 is placed between the secondary support plate 21 and the main extension link 12. The above-mentioned inner side refers to the inner side of the seat.

[0044] The linkage rod 30 includes a first linkage part 31 and a second linkage part 32. The connection point of the first support part 111 and the second support part 112 is connected to the first linkage part 31. The second linkage part 32 is connected to the secondary footrest assembly 20.

[0045] When the seat is in the TV position, along the first direction, the first linkage part 31 extends away from the secondary footrest assembly 20, and the angle between the first linkage part 31 and the horizontal plane is a, and the range of a is 10° - 15°. In this way, the first linkage part 31 is basically parallel to the horizontal plane, reducing the height of the connection point of the first support part 111 and the second support part 112, and thus reducing the height of the main footrest assembly 10, ensuring that when the seat is in the TV position, the first plane is below the second plane.

[0046] The angle between the first linkage part 31 and the second linkage part 32 is b, and the range of b is 155° - 165°. And the length of the first linkage part 31 is greater than the length of the second linkage part 32. In this way, the main support plate 11 fixed on the first linkage part 31 can be arranged away from the linkage rod 30. While avoiding interference between their movements, it meets the distance between the heel and the calf, enabling the user to better support on the main footrest assembly 10 and the secondary footrest assembly 20.

[0047] The extension assembly 40 includes a first link 41, a second link 42, a third link 43, and a fourth link 44. Both ends of the first link 41 are respectively connected to the auxiliary support plate 21 and the second link 42. One end of the third link 43 is connected to the main extension link 12 and the auxiliary support plate 21, and the other end of the third link 43 is connected to the fourth link 44. The middle of the first link 41 is connected to the fourth link 44, forming a four-link structure with stable structure.

[0048] The third link 43 is bent toward the side close to the first link 41. The third link 43 and the first link 41 partially overlap, making the overall structure of the extension assembly 40 more compact. In addition, when viewed from the outside of the seat, the first link 41 can play a role in shielding the third link 43, improving the appearance design of the extension assembly 40 and enhancing the overall aesthetic and neatness of the product.

[0049] The drive assembly 50 includes a drive member 51, a first extension link 52, and a second extension link 53. Both ends of the first extension link 52 are respectively connected to the drive member 51 and the second extension link 53, and the second extension link 53 is connected to the middle of the fourth link 44. The drive member 51 transmits force to the extension assembly 40 through the first extension link 52 and the second extension link 53.

[0050] The seat further includes a base 60, a suspension assembly 70, a seat frame assembly 80, and a backrest assembly 90. The suspension assembly 70 is respectively connected to the base 60 and the seat frame assembly 80. The backrest assembly 90 and the extension assembly 40 are respectively connected to the front and rear ends of the seat frame assembly 80. The second link 42 and the fourth link 44 are respectively connected to the seat frame assembly 80, and thus, while the extension assembly 40 is unfolding, it drives the seat frame assembly 80 to move synchronously.

[0051] When the seat is in the sitting position, TV position, and lying position, the angular range formed by the mounting surface of the seat frame assembly 80 and the horizontal plane is 7° - 11°, 10° - 14°, and 26° - 28° respectively.

[0052] In this embodiment, the horizontal plane where the highest point of the backrest assembly 90 is located is the third plane. When the seat is in the lying position, the first plane is above the third plane, and the shortest distance between the first plane and the third plane is 120 - 125 cm. At this time, the seat is in the zero-gravity state and is in the most comfortable posture.

[0053] The main footrest assembly 10 and the auxiliary footrest assembly 20 of this application have simple structures, few parts, low production and processing costs, and can achieve heel support for users. When the seat is in the TV position, the first plane is below the second plane, and thus a height difference can be formed between the first plane and the second plane to place the heel, avoiding the heel driving the calf to bend upward and improving the comfort of the user when sitting.

[0054] In the linkages forming the main footrest assembly 10, auxiliary footrest assembly 20, extension assembly 40 and drive assembly 50 of this application, there are bending parts. On the one hand, the bending parts can make the structure itself more compact, and on the other hand, they help to disperse the force, avoid the phenomenon of local stress concentration, and improve the stability and strength of the seat. In addition, a plurality of arc-shaped avoidance grooves are formed in the linkages forming the above components to achieve anti-misoperation.

[0055] 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 this 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 this application shall be included within the scope of protection of this application.

Claims

1. A seating device, characterized in that, It includes a main footrest assembly, a secondary footrest assembly and a linkage rod; the horizontal plane where the highest point of the main footrest assembly is located is the first plane, and the horizontal plane where the highest point of the secondary footrest assembly is located is the second plane; the linkage rod includes a first linkage part connected to the main footrest assembly and a second linkage part connected to the secondary footrest assembly, and an obtuse angle is formed between the first linkage part and the second linkage part; wherein, when the seat is in the TV posture state, the first plane is below the second plane.

2. The seat according to claim 1, characterized in that when the seat is in the TV posture state, along the first direction, the first linkage part extends towards the side away from the secondary footrest assembly, and the angle between the first linkage part and the horizontal plane is a, and the range of a is 10° - 15°.

3. The seat according to claim 2, characterized in that the angle between the first linkage part and the second linkage part is b, and the range of b is 155° - 165°; the length of the first linkage part is greater than the length of the second linkage part.

4. The seat according to claim 1, characterized in that when the seat is in the lying posture state, an angle c is formed between the main footrest assembly and the horizontal plane, and the degree range of the angle c is 5° - 20°, and an angle d is formed between the secondary footrest assembly and the horizontal plane, and the degree range of the angle d is 7° - 23°; the angle c is less than the angle d.

5. The seat according to claim 1, characterized in that it further includes an extension assembly; the main footrest assembly includes a main support plate and a main extension link; one end of the main support plate is used to support the user's foot; the other end is connected to one end of the main extension link, and the other end of the main extension link is connected to the extension assembly.

6. The seat according to claim 5, characterized in that the main support plate 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 linkage rod; an obtuse angle is formed between the first support part and the second support part.

7. The seat according to claim 5, characterized in that the secondary footrest assembly includes a secondary support plate and a secondary link; both ends of the secondary link are respectively connected to the secondary support plate and the main extension link and are placed therebetween.

8. The seat according to claim 7, characterized in that the extension assembly includes a first link, a second link, a third link and a fourth link, and both ends of the first link are respectively connected to the secondary support plate and the second link; one end of the third link is connected to the main extension link and the secondary support plate, and the other end of the third link is connected to the fourth link; wherein, the middle part of the first link is connected to the fourth link.

9. The seat according to claim 8, characterized in that the third link is bent towards the side of the first link; the third link and the first link partially overlap.

10. The seat according to claim 8, characterized in that It further includes a driving component; 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.

11. The seat according to claim 8, wherein it further includes a base, a suspension assembly, a seat frame assembly and a backrest assembly; 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.

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