Zero-gravity zero-wall-leaning sofa iron stand and sofa

Abstract

The utility model provides a zero-gravity zero-wall-leaning sofa iron stand and a sofa, the sofa iron stand comprises a seat frame bracket, a suspension mechanism, a pedal mechanism, a backrest mechanism, a driving mechanism and an armrest mounting plate, so that the sofa iron stand is switched among a sitting posture state, a TV posture state and a lying posture state; when the sofa iron stand is in a sitting posture state, the pedal mechanism is folded below the seat frame bracket; when the sofa iron stand is switched from the sitting posture state to the TV posture state, the pedal mechanism moves forwards and upwards; when the sofa iron stand is switched from the TV posture state to the lying posture state, the backrest mechanism inclines backwards, and the highest point of the pedal mechanism is not lower than the highest point of the backrest mechanism; when the sofa iron stand is sequentially switched among a sitting posture state, a TV posture state and a lying posture state, the seat frame bracket is forwards and upwards lifted, and the rearmost end of the backrest mechanism has a forward movement trend, so that the problem that a sofa in the prior art cannot completely meet the use requirements of a user is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, and particularly to a sofa iron frame and a sofa with zero gravity and zero wall contact. Background Technique

[0002] At present, with the improvement of people's living standards, the furniture in the home is gradually developing towards high quality and high grade. As one of the main furniture in the home, the sofa is gradually changing from focusing on traditional practicality to paying more attention to functionality and comfort. For this reason, movable sofa units, also known as functional sofas, have emerged on the market.

[0003] The functionality of the sofa includes special arrangements such as zero wall contact and zero gap, or comfort requirements such as zero gravity and zero back rubbing. Among them, zero wall contact means that the sofa backrest can be against the wall and the posture of the sofa can be adjusted while maintaining the state of being against the wall; zero gravity means that when adjusting the posture of the sofa, the setting of the space capsule can be simulated, so that the user's legs are slightly higher than the heart to reduce the pressure on the spine and joints, allowing people to enjoy the relaxed state of zero pressure freely.

[0004] However, with the continuous improvement of users' living standards, users have extreme pursuits for the layout convenience and comfort of the sofa. For example, users have requirements for both the zero wall contact layout and the zero gravity comfort experience of the sofa, while the sofas in the existing technology cannot fully meet the user's usage requirements. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a sofa iron frame and a sofa with zero gravity and zero wall contact to solve the problem that the sofas in the existing technology cannot fully meet the user's usage requirements.

[0006] To achieve the above purpose, according to one aspect of the utility model, a sofa iron frame with zero gravity and zero wall contact is provided, including: a seat frame support, a suspension mechanism, a footrest mechanism, a backrest mechanism, a driving mechanism, and an armrest mounting plate. The footrest mechanism is hinged to the seat frame support, the backrest mechanism is respectively hinged to the seat frame support and the armrest mounting plate, the driving mechanism is respectively connected to the footrest mechanism and the armrest mounting plate, and the suspension mechanism is connected to the seat frame support, the footrest mechanism, and the armrest mounting plate to enable the sofa iron frame to switch between a sitting posture state, a TV posture state, and a lying posture state; wherein, when the sofa iron frame is in the sitting posture state, the footrest mechanism is retracted below the seat frame support; when the sofa iron frame switches from the sitting posture state to the TV posture state, the footrest mechanism moves forward and upward; when the sofa iron frame switches from the TV posture state to the lying posture state, the backrest mechanism tilts backward, and the highest point of the footrest mechanism is not lower than the highest point of the backrest mechanism; when the sofa iron frame sequentially switches between the sitting posture state, the TV posture state, and the lying posture state, the seat frame support moves forward and upward, and the rearmost end of the backrest mechanism has a tendency to move forward.

[0007] Further, when the sofa iron frame switches from the sitting position to the TV position, the angle β between the upper surface of the seat frame bracket and the horizontal line increases by 2° to 10°; and / or when the sofa iron frame switches from the TV position to the lying position, the angle β between the upper surface of the seat frame bracket and the horizontal line increases by 6° to 14°; and / or when the sofa iron frame is in the lying position, the angle β between the upper surface of the seat frame bracket and the horizontal line is 14° to 30°.

[0008] Further, when the sofa iron frame switches from the sitting position to the TV position, the angle β between the upper surface of the seat frame bracket and the horizontal line increases by 4° to 8°; and / or when the sofa iron frame switches from the TV position to the lying position, the angle β between the upper surface of the seat frame bracket and the horizontal line increases by 8° to 11.5°; and / or when the sofa iron frame is in the lying position, the angle β between the upper surface of the seat frame bracket and the horizontal line is 20° to 26°.

[0009] Further, the suspension mechanism includes: a first link assembly, in which a plurality of links in the first link assembly are sequentially connected to the seat frame bracket and surround to form a loop; a second link assembly, in which a plurality of links in the second link assembly are sequentially connected to the armrest mounting plate and surround to form a loop; a linkage rod assembly, which is used to connect the footrest mechanism and the first link assembly, and the linkage rod assembly is used to connect the first link assembly and the second link assembly.

[0010] Further, the first link assembly includes a second rod, a third rod, and a fourth rod, and the seat frame bracket, the second rod, the third rod, and the fourth rod are sequentially connected; wherein, the ratio of the distance between the hinge point of the second rod and the seat frame bracket and the hinge point of the second rod and the third rod to the distance between the hinge point of the fourth rod and the seat frame bracket and the hinge point of the fourth rod and the third rod is 0.91 to 1.1; the second link assembly includes a sixth rod and an eighth rod respectively connected to the armrest mounting plate, and a seventh rod or multiple rods are simultaneously connected between the sixth rod and the eighth rod; the linkage rod assembly includes a ninth rod and a tenth rod, and two ends of the ninth rod are respectively hinged to the front end of the third rod and the middle lower part of the eighth rod; two ends of the tenth rod are respectively hinged to the upper end of the eighth rod and the middle part of the third rod; wherein, the ratio of the distance between the hinge point of the eighth rod and the armrest mounting plate and the hinge point of the eighth rod and the ninth rod to the distance between the hinge point of the eighth rod and the armrest mounting plate and the hinge point of the eighth rod and the tenth rod is 0.35 to 0.4.

[0011] Further, the backrest mechanism includes a first backrest rod, a second backrest rod, a third backrest rod, and a backrest mounting plate, and the first backrest rod, the second backrest rod, the third backrest rod, and the backrest mounting plate are sequentially connected and surround to form a loop. The first backrest rod is used to be hinged to the armrest mounting plate, the second backrest rod is used to be connected to the backrest plate of the sofa including the sofa iron frame, and the backrest mounting plate is fixedly connected to the seat frame bracket.

[0012] Further, the hinge point between the second backrest rod and the third backrest rod is point O. Among them, when the sofa iron frame switches from the sitting position state to the TV position state, the angle α between the side of the second backrest rod close to the human body and the upper surface of the seat frame bracket increases by 0.5° to 5°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle α between the side of the second backrest rod close to the human body and the upper surface of the seat frame bracket increases by 30° to 35°; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the angle γ between the extension line of the third backrest rod and the upper surface of the seat frame bracket decreases by 7° to 11°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle γ between the extension line of the third backrest rod and the upper surface of the seat frame bracket decreases by 30° to 40°; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the first distance L1 that point O moves forward is 100 mm to 150 mm; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the first distance M1 that point O moves downward is 95 mm to 110 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance L2 that point O moves forward is 125 mm to 175 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance M2 that point O moves upward is 70 mm to 90 mm.

[0013] Further, the hinge point between the second backrest rod and the third backrest rod is point O, and the side of the backrest mounting plate close to the footrest mechanism is the front end of the backrest mounting plate; when the sofa iron frame is in the sitting position state, the angle α between the side of the second backrest rod close to the human body and the upper surface of the seat frame bracket is 100° to 110°; and / or the angle γ between the extension line of the third backrest rod and the upper surface of the seat frame bracket is 103° to 107°; and / or point O is located on the side of the front end of the backrest mounting plate away from the human body, and the distance N between point O and the front end of the backrest mounting plate in the direction parallel to the upper surface of the seat frame bracket is 60 mm to 90 mm, and the distance P between point O and the upper surface of the seat frame bracket is 110 mm to 160 mm; and / or the angle β between the upper surface of the seat frame bracket and the horizontal line is 8° to 11°.

[0014] Further, the hinge point between the second backrest rod and the third backrest rod is point O, and the side of the backrest mounting plate close to the footrest mechanism is the front end of the backrest mounting plate; when the sofa iron frame is in the TV position, the angle α between the side of the second backrest rod close to the human body and the upper surface of the seat frame bracket is 100° to 110°; and / or the angle γ between the extension line of the third backrest rod and the upper surface of the seat frame bracket is 94° to 98°; and / or point O is located on the side of the front end of the backrest mounting plate away from the human body, and the distance N between point O and the front end of the backrest mounting plate in the direction parallel to the upper surface of the seat frame bracket is 40 mm to 65 mm, and the distance P between point O and the upper surface of the seat frame bracket is 90 mm to 120 mm; and / or the angle β between the upper surface of the seat frame bracket and the horizontal line is 12° to 18°; and / or the vertical distance H1 between the foremost end of the footrest mechanism and the center of the rear mounting hole of the armrest mounting plate is 330 mm to 380 mm.

[0015] Further, the hinge point between the second backrest rod and the third backrest rod is point O, and the side of the backrest mounting plate close to the footrest mechanism is the front end of the backrest mounting plate; when the sofa iron frame is in the reclined position, the angle α between the side of the second backrest rod close to the human body and the upper surface of the seat frame bracket is 135° to 140°; and / or the angle γ between the extension line of the third backrest rod and the upper surface of the seat frame bracket is 55° to 65°; and / or point O is located on the side of the front end of the backrest mounting plate close to the human body, and the distance N between point O and the front end of the backrest mounting plate in the direction parallel to the upper surface of the seat frame bracket is 10 mm to 30 mm, and the distance P between point O and the upper surface of the seat frame bracket is 100 mm to 130 mm; and / or the vertical distance H1 between the foremost end of the footrest mechanism and the center of the rear mounting hole of the armrest mounting plate is greater than or equal to 550 mm.

[0016] According to another aspect of the present invention, there is provided a sofa, including the above zero-gravity zero-wall-adjacent sofa iron frame.

[0017] Applying the technical solution of the present utility model, the sofa iron frame of the present utility model includes: a seat frame bracket, a suspension mechanism, a footrest mechanism, a backrest mechanism, a driving mechanism, and an armrest mounting plate. The footrest mechanism is hinged to the seat frame bracket, the backrest mechanism is respectively hinged to the seat frame bracket and the armrest mounting plate, the driving mechanism is respectively connected to the footrest mechanism and the armrest mounting plate, and the suspension mechanism is connected to the seat frame bracket, the footrest mechanism, and the armrest mounting plate, so that the sofa iron frame can be switched between a sitting posture state, a TV posture state, and a lying posture state; wherein, when the sofa iron frame is in the sitting posture state, the footrest mechanism is retracted under the seat frame bracket; when the sofa iron frame is switched from the sitting posture state to the TV posture state, the footrest mechanism moves forward and upward; when the sofa iron frame is switched from the TV posture state to the lying posture state, the backrest mechanism tilts backward, and the highest point of the footrest mechanism is not lower than the highest point of the backrest mechanism; when the sofa iron frame is sequentially switched between the sitting posture state, the TV posture state, and the lying posture state, the seat frame bracket moves forward and upward, and the rearmost end of the backrest mechanism has a tendency to move forward. In this way, by setting the above-mentioned zero-gravity zero-wall-touching sofa iron frame, the present utility model can not only realize the switching of the zero-gravity zero-wall-touching sofa between the sitting posture state, the TV posture state, and the lying posture state, but also reduce the pressure exerted by the connecting rods at the backrest on the cushion soft package, improving the overall comfort of the seat using the zero-gravity zero-wall-touching sofa iron frame of the present utility model, and solving the problem that the sofas in the prior art cannot fully meet the user's usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0019] Figure 1 shows a schematic structural diagram of an embodiment of the sofa iron frame according to the present utility model in a sitting posture state in one direction; and

[0020] Figure 2 shows Figure 1 the schematic structural diagram of the sofa iron frame shown in another direction;

[0021] Figure 3 shows Figure 1 the front view of the sofa iron frame shown;

[0022] Figure 4 shows Figure 1 the rear view of the sofa iron frame shown;

[0023] Figure 5 shows a schematic structural diagram of an embodiment of the sofa iron frame according to the present utility model in a TV posture state in one direction;

[0024] Figure 6 shows Figure 5 a schematic structural view of the shown sofa iron frame in another direction;

[0025] Figure 7 shows Figure 5 the front view of the shown sofa iron frame;

[0026] Figure 8 shows Figure 5 the rear view of the shown sofa iron frame;

[0027] Figure 9 shows a schematic structural view of an embodiment of the sofa iron frame according to the present utility model in a lying position state in one direction;

[0028] Figure 10 shows Figure 9 a schematic structural view of the shown sofa iron frame in another direction;

[0029] Figure 11 shows Figure 9 the front view of the shown sofa iron frame;

[0030] Figure 12 shows Figure 9 the rear view of the shown sofa iron frame;

[0031] Figure 13 shows a diagram of the position change of point O of the sofa iron frame according to the present utility model in different states;

[0032] Figure 14 shows Figure 1 a dimensional schematic view of the shown sofa iron frame in a sitting position state;

[0033] Figure 15 shows Figure 1 a dimensional schematic view of the shown sofa iron frame in a TV position state;

[0034] Figure 16 shows Figure 1 a dimensional schematic view of the shown sofa iron frame in a lying position state.

[0035] Among them, the above-mentioned drawings include the following reference numerals:

[0036] 1. Seat frame bracket; 11. First limit post;

[0037] 2. Suspension mechanism; 21. First rod; 22. Second rod; 23. Third rod; 24. Fourth rod; 25. Fifth rod; 26. Sixth rod; 27. Seventh rod; 28. Eighth rod; 29. Ninth rod; 210. Tenth rod;

[0038] 3. Footrest mechanism; 31. Extension rod group; 301. First leg link; 302. Second leg link; 32. Main footrest; 33. Sub-footrest assembly;

[0039] 4. Backrest mechanism; 40. Backrest plate; 41. First backrest rod; 42. Second backrest rod; 43. Third backrest rod; 44. Backrest mounting plate; 45. Armrest connecting rod; 46. Second limit post;

[0040] 5. Driving mechanism; 51. First driving rod; 52. Second driving rod;

[0041] 6. Armrest mounting plate. Specific embodiments

[0042] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.

[0043] As Figures 1 to 16 shown, the present utility model provides a zero-gravity zero-wall-adjacent sofa iron frame, including: seat frame bracket 1, suspension mechanism 2, footrest mechanism 3, backrest mechanism 4, driving mechanism 5 and armrest mounting plate 6. The footrest mechanism 3 is hinged to the seat frame bracket, the backrest mechanism 4 is respectively hinged to the seat frame bracket 1 and the armrest mounting plate 6, the driving mechanism 5 is respectively connected to the footrest mechanism 3 and the armrest mounting plate 6, and the suspension mechanism 2 is connected to the seat frame bracket 1, the footrest mechanism 3 and the armrest mounting plate 6, so that the sofa iron frame can be switched between a sitting posture state, a TV posture state and a lying posture state; wherein, when the sofa iron frame is in the sitting posture state, the footrest mechanism 3 is retracted under the seat frame bracket 1; when the sofa iron frame is switched from the sitting posture state to the TV posture state, the footrest mechanism 3 moves forward and upward; when the sofa iron frame is switched from the TV posture state to the lying posture state, the backrest mechanism tilts backward, and the highest point of the footrest mechanism 3 is not lower than the highest point of the backrest mechanism 4; when the sofa iron frame is sequentially switched between the sitting posture state, the TV posture state and the lying posture state, the seat frame bracket 1 moves forward and upward, and the rearmost end of the backrest mechanism 4 has a tendency to move forward.

[0044] In this way, by setting the above zero-gravity zero-wall-adjacent sofa iron frame, the present utility model can not only realize the switching of the zero-gravity zero-wall-adjacent sofa between the sitting posture state, the TV posture state and the lying posture state, but also reduce the pressure exerted by the link at the backrest on the cushion soft package, improving the overall comfort of the seat using the zero-gravity zero-wall-adjacent sofa iron frame of the present utility model, and solving the problem that the sofas in the prior art cannot fully meet the user's usage requirements.

[0045] It should be noted that in the present utility model, the front end refers to the end on the side away from the wall and close to the sofa, and the rear end refers to the end on the side close to the wall and close to the sofa. Specifically, the "rear end of the backrest mechanism 4" in the above-mentioned "when the sofa iron frame sequentially switches between the sitting position state, the TV position state, and the lying position state, the seat frame bracket 1 is lifted forward and upward, and the rear end of the backrest mechanism 4 has a tendency to move forward" refers to: when the backrest mechanism 4 is in the sitting position state as shown in Figure 14 , the position or component on the side close to the wall and close to the sofa in the backrest mechanism 4 (that is, the position or component close to the backrest plate 40 of the sofa in the backrest mechanism 4).

[0046] In the sofa iron frame of the present utility model, when the sofa iron frame switches from the sitting position state to the TV position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 2° to 10°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 6° to 14°; and / or when the sofa iron frame is in the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line is 14° to 30°.

[0047] Furthermore, when the sofa iron frame switches from the sitting position state to the TV position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 4° to 8°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 8° to 11.5°; and / or when the sofa iron frame is in the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line is 20° to 26°.

[0048] Specifically, when the sofa iron frame switches from the sitting position state to the TV position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 6°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line increases by 10°; and / or when the sofa iron frame is in the lying position state, the angle β between the upper surface of the seat frame bracket 1 and the horizontal line is 25.6°.

[0049] As shown in Figures 1 to 12 , the footrest mechanism 3 includes a telescopic rod group 31, a main footrest 32, and a secondary footrest assembly 33 connected in sequence. The telescopic rod group 31 includes a first leg link 301 and a second leg link 302; wherein, one end of the first leg link 301 away from the main footrest 32 is hinged to the front end of the first rod 21, the first leg link 301 is hinged to the middle front part of the seat frame bracket 1, and the hinge point of the first leg link 301 and the seat frame bracket 1 is located between the two ends of the first leg link 301; one end of the second leg link 302 away from the main footrest 32 is hinged to the front end of the seat frame bracket 1, and the drive mechanism 5 is drivingly connected to the second leg link 302.

[0050] As Figures 1 to 12 shown, the driving mechanism 5 includes: a first driving rod 51, the first driving rod 51 is hinged to the middle of the second leg link 302; a second driving rod 52, the second driving rod 52 is parallel to the first driving rod 51, and the second driving rod 52 is hinged to the rear end of the armrest mounting plate 6; a driving component, the fixed part of the driving component is connected to the second driving rod 52, and the moving part of the driving component is connected to the first driving rod 51 to drive the first driving rod 51 to move in a direction close to or away from the second driving rod 52.

[0051] As Figures 1 to 12 shown, the suspension mechanism 2 includes: a first link assembly, a plurality of links in the first link assembly are sequentially connected to the seat frame bracket 1 and surround to form a loop; a second link assembly, a plurality of links in the second link assembly are sequentially connected to the armrest mounting plate 6 and surround to form a loop; a linkage rod assembly, the linkage rod assembly is used to connect the footrest mechanism 3 and the first link assembly, and the linkage rod assembly is used to connect the first link assembly and the second link assembly.

[0052] As Figures 1 to 12 shown, the first link assembly includes a second rod 22, a third rod 23 and a fourth rod 24, and the seat frame bracket 1, the second rod 22, the third rod 23 and the fourth rod 24 are sequentially connected; the second link assembly includes a sixth rod 26, a seventh rod 27 and an eighth rod 28, and the sixth rod 26, the seventh rod 27, the eighth rod 28 and the armrest mounting plate 6 are sequentially connected; the linkage rod assembly includes a first rod 21, a fifth rod 25, a ninth rod 29 and a tenth rod 210, the first rod 21 is respectively hinged to the footrest mechanism 3 and the second rod 22, the fifth rod 25 is respectively hinged to the sixth rod 26 and the third rod 23, the ninth rod 29 is respectively hinged to the third rod 23 and the eighth rod 28; the tenth rod 210 is respectively hinged to the eighth rod 28 and the third rod 23.

[0053] In an embodiment not shown in the present utility model, the first link assembly includes a second rod 22, a third rod 23 and a fourth rod 24, and the seat frame bracket 1, the second rod 22, the third rod 23 and the fourth rod 24 are sequentially connected; the second link assembly includes a sixth rod 26, a plurality of links and an eighth rod 28, and the sixth rod 26, the plurality of links, the eighth rod 28 and the armrest mounting plate 6 are sequentially connected; the linkage rod assembly includes a first rod 21, a fifth rod 25, a ninth rod 29 and a tenth rod 210, the first rod 21 is respectively hinged to the footrest mechanism 3 and the second rod 22, the fifth rod 25 is respectively hinged to the sixth rod 26 and the third rod 23, the ninth rod 29 is respectively hinged to the third rod 23 and the eighth rod 28; the tenth rod 210 is respectively hinged to the eighth rod 28 and the third rod 23.

[0054] As Figures 1 to 12As shown, both ends of the first rod 21 are respectively hinged to the pedal mechanism 3 and the middle part of the second rod 22; and / or the upper end of the second rod 22 is hinged to the seat frame support 1, and the lower end of the second rod 22 is hinged to the middle part of the third rod 23; and / or the upper end of the fourth rod 24 is hinged to the seat frame support 1, and the lower end of the fourth rod 24 is hinged to the front lower end of the third rod 23; and / or the top end of the fifth rod 25 is hinged to the middle part of the sixth rod 26, the middle part of the fifth rod 25 is hinged to the rear end of the third rod 23, and the lower end of the fifth rod 25 is used to connect the synchronous rod of the sofa, and the synchronous rod can make the two symmetrically arranged sofa iron frames of the same set of sofas move synchronously; and / or the upper end of the sixth rod 26 is hinged to the rear end of the seventh rod 27, and the lower end of the sixth rod 26 is hinged to the armrest mounting plate 6; and / or the middle upper part of the eighth rod 28 is hinged to the front end of the seventh rod 27, and the lower end of the eighth rod 28 is hinged to the armrest mounting plate 6; and / or both ends of the ninth rod 29 are respectively hinged to the front end of the third rod 23 and the middle lower part of the eighth rod 28; and / or both ends of the tenth rod 210 are respectively hinged to the upper end of the eighth rod 28 and the middle part of the third rod 23.

[0055] Wherein, two first limit posts 11 are arranged at intervals on the seat frame support 1, and the two first limit posts 11 are respectively located on the front and rear sides of the hinge point between the fourth rod 24 and the seat frame support 1 to limit the rotation of the fourth rod 24.

[0056] In the sofa iron frame of the present utility model, the distance between the hinge point of the first rod 21 and the footrest mechanism 3 and the hinge point of the first rod 21 and the second rod 22 is 310 mm to 360 mm; and / or the distance between the hinge point of the second rod 22 and the seat frame bracket 1 and the hinge point of the second rod 22 and the first rod 21 is 30 mm to 50 mm; and / or the distance between the hinge point of the second rod 22 and the seat frame bracket 1 and the hinge point of the second rod 22 and the third rod 23 is 120 mm to 160 mm; and / or the distance between the hinge point of the second rod 22 and the third rod 23 and the hinge point of the third rod 23 and the fourth rod 24 is 250 mm to 300 mm; and / or the distance between the hinge point of the fourth rod 24 and the seat frame bracket 1 and the hinge point of the fourth rod 24 and the third rod 23 is 120 mm to 170 mm; and / or the distance between the hinge point of the fifth rod 25 and the sixth rod 26 and the hinge point of the fifth rod 25 and the third rod 23 is 40 mm to 90 mm; and / or the distance between the hinge point of the second rod 22 and the third rod 23 and the hinge point of the fifth rod 25 and the third rod 23 is 35 mm to 85 mm; and / or the distance between the hinge point of the third rod 23 and the fourth rod 24 and the hinge point of the fifth rod 25 and the third rod 23 is 310 mm to 360 mm; and / or the distance between the hinge point of the fifth rod 25 and the sixth rod 26 and the hinge point of the sixth rod 26 and the seventh rod 27 is 20 mm to 30 mm; and / or the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the sixth rod 26 and the armrest mounting plate 6 is 60 mm to 80 mm; and / or the distance between the hinge point of the eighth rod 28 and the tenth rod 210 and the hinge point of the eighth rod 28 and the seventh rod 27 is 35 mm to 60 mm; and / or the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the eighth rod 28 and the seventh rod 27 is 250 mm to 300 mm; and / or the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the ninth rod 29 is 20 mm to 40 mm; and / or the distance between the hinge point of the eighth rod 28 and the ninth rod 29 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 25 mm to 60 mm; and / or the distance between the hinge point of the sixth rod 26 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 280 mm to 320 mm; and / or the distance between the hinge point of the eighth rod 28 and the ninth rod 29 and the hinge point of the ninth rod 29 and the third rod 23 is 45 mm to 65 mm; and / or the distance between the hinge point of the ninth rod 29 and the third rod 23 and the hinge point of the fourth rod 24 and the third rod 23 is 20 mm to 35 mm; and / or the distance between the hinge point of the eighth rod 28 and the tenth rod 210 and the hinge point of the tenth rod 210 and the third rod 23 is 45 mm to 65 mm; and / or the distance between the hinge point of the first leg link 301 and the seat frame bracket 1 and the hinge point of the second leg link 302 and the seat frame bracket 1 and the seat frame bracket 1 is 55 mm to 105 mm;The distance between the hinge point of the first leg link 301 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 50 mm to 100 mm; and / or the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 230 mm to 270 mm.

[0057] Specifically, the distance between the hinge point of the first rod 21 and the pedal mechanism 3 and the hinge point of the first rod 21 and the second rod 22 is 343.1 mm; and / or the distance between the hinge point of the second rod 22 and the seat frame bracket 1 and the hinge point of the second rod 22 and the first rod 21 is 40.9 mm; and / or the distance between the hinge point of the second rod 22 and the seat frame bracket 1 and the hinge point of the second rod 22 and the third rod 23 is 140.7 mm; and / or the distance between the hinge point of the second rod 22 and the third rod 23 and the hinge point of the third rod 23 and the fourth rod 24 is 272.1 mm; and / or the distance between the hinge point of the fourth rod 24 and the seat frame bracket 1 and the hinge point of the fourth rod 24 and the third rod 23 is 146.2 mm; and / or the distance between the hinge point of the fifth rod 25 and the sixth rod 26 and the hinge point of the fifth rod 25 and the third rod 23 is 68.5 mm; and / or the distance between the hinge point of the second rod 22 and the third rod 23 and the hinge point of the fifth rod 25 and the third rod 23 is 61.3 mm; and / or the distance between the hinge point of the third rod 23 and the fourth rod 24 and the hinge point of the fifth rod 25 and the third rod 23 is 332.6 mm; and / or the distance between the hinge point of the fifth rod 25 and the sixth rod 26 and the hinge point of the sixth rod 26 and the seventh rod 27 is 25 mm; and / or the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the sixth rod 26 and the armrest mounting plate 6 is 75 mm; and / or the distance between the hinge point of the eighth rod 28 and the tenth rod 210 and the hinge point of the eighth rod 28 and the seventh rod 27 is 46 mm; and / or the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the eighth rod 28 and the seventh rod 27 is 280 mm; and / or the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the ninth rod 29 is 32.8 mm; and / or the distance between the hinge point of the eighth rod 28 and the ninth rod 29 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 47.6 mm; and / or the distance between the hinge point of the sixth rod 26 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 293.9 mm; and / or the distance between the hinge point of the eighth rod 28 and the ninth rod 29 and the hinge point of the ninth rod 29 and the third rod 23 is 55 mm; and / or the distance between the hinge point of the ninth rod 29 and the third rod 23 and the hinge point of the fourth rod 24 and the third rod 23 is 28.4 mm; and / or the distance between the hinge point of the eighth rod 28 and the tenth rod 210 and the hinge point of the tenth rod 210 and the third rod 23 is 55 mm; and / or the distance between the hinge point of the first leg link 301 and the seat frame bracket 1 and the hinge point of the second leg link 302 and the seat frame bracket 1 is 80.5 mm; and / or the distance between the hinge point of the first leg link 301 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 74 mm; and / or the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 248.7 mm.

[0058] In the sofa iron frame of the present utility model, the ratio of the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the second link 22 and the third link 23 to the distance between the hinge point of the fourth link 24 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the third link 23 is 0.91 - 1.1; and / or the ratio of the distance between the hinge point of the second link 22 and the third link 23 and the hinge point of the third link 23 and the fourth link 24 to the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 0.95 - 1.05; and / or the ratio of the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the first link 21 and the second link 22 to the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the second link 22 and the third link 23 is 0.25 - 0.35.

[0059] Specifically, the ratio of the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the second link 22 and the third link 23 to the distance between the hinge point of the fourth link 24 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the third link 23 is 0.96; and / or the ratio of the distance between the hinge point of the second link 22 and the third link 23 and the hinge point of the third link 23 and the fourth link 24 to the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the fourth link 24 and the seat frame bracket 1 is 1.09; and / or the ratio of the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the first link 21 and the second link 22 to the distance between the hinge point of the second link 22 and the seat frame bracket 1 and the hinge point of the second link 22 and the third link 23 is 0.29.

[0060] In the sofa iron frame of the present utility model, the ratio of the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the sixth rod 26 and the armrest mounting plate 6 to the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.88 to 0.98; and / or the ratio of the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the eighth rod 28 and the seventh rod 27 to the distance between the hinge point of the sixth rod 26 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.9 to 1; and / or in the sofa iron frame of the present utility model, the ratio of the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the ninth rod 29 to the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.55 to 0.65; the ratio of the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the ninth rod 29 to the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the tenth rod 210 is 0.35 to 0.4.

[0061] Specifically, the ratio of the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the sixth rod 26 and the armrest mounting plate 6 to the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.93; and / or the ratio of the distance between the hinge point of the sixth rod 26 and the seventh rod 27 and the hinge point of the eighth rod 28 and the seventh rod 27 to the distance between the hinge point of the sixth rod 26 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.95; and / or the ratio of the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the ninth rod 29 to the distance between the hinge point of the eighth rod 28 and the seventh rod 27 and the hinge point of the eighth rod 28 and the armrest mounting plate 6 is 0.59; the ratio of the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the ninth rod 29 to the distance between the hinge point of the eighth rod 28 and the armrest mounting plate 6 and the hinge point of the eighth rod 28 and the tenth rod 210 is 0.38.

[0062] As Figures 1 to 12 shown, the backrest mechanism 4 includes a first backrest rod 41, a second backrest rod 42, a third backrest rod 43 and a backrest mounting plate 44. The first backrest rod 41, the second backrest rod 42, the third backrest rod 43 and the backrest mounting plate 44 are connected in sequence and surround to form a ring. The first backrest rod 41 is used for being hinged to the armrest mounting plate 6. The second backrest rod 42 is used for being connected to the backrest plate 40 of the sofa including the sofa iron frame. The backrest mounting plate 44 is fixedly connected to the seat frame bracket 1.

[0063] By Figures 14 to 16It can be seen that when the sofa iron frame is sequentially switched between the sitting position state, the TV position state, and the lying position state, the backrest rod 41, the backrest rod 42, the backrest rod 43, and the backrest mounting plate 44 all tend to move forward relative to the armrest mounting plate 6.

[0064] As Figures 1 to 12 shown, the backrest mechanism 4 further includes an armrest connecting rod 45 for connecting the backrest rod 41 and the armrest mounting plate 6. The front end of the backrest rod 41 is hinged to the rear end of the backrest rod 42, the middle part of the backrest rod 41 is hinged to the rear end of the backrest mounting plate 44, and the lower end of the backrest rod 41 is hinged to the front end of the armrest connecting rod 45. The front end of the backrest rod 42 is hinged to the upper end of the backrest rod 43, and the upper end of the backrest rod 42 is hinged to the lower front end of the backrest plate 40. The lower end of the backrest rod 43 is hinged to the middle part of the backrest mounting plate 44. The lower end of the backrest mounting plate 44 is fixedly connected to the rear end of the seat frame bracket 1. The rear end of the armrest connecting rod 45 is hinged to the armrest mounting plate 6.

[0065] From Figures 14 to 16 it can be seen that when the sofa iron frame is sequentially switched between the sitting position state, the TV position state, and the lying position state, the end of the armrest connecting rod 45 connected to the backrest rod 41 tends to move forward relative to the armrest mounting plate 6.

[0066] Wherein, two second limiting columns 46 are arranged at intervals on the backrest mounting plate 44, and the two first limiting columns 11 are respectively located on the front and rear sides of the hinge point between the backrest rod 43 and the backrest mounting plate 44 to limit the rotation of the backrest rod 43.

[0067] In the sofa iron frame of the present invention, the hinge point between the backrest rod 42 and the backrest rod 43 is point O. Among them, when the sofa iron frame is switched from the sitting position state to the TV position state, the angle α between the side of the backrest rod 42 close to the human body and the upper surface of the seat frame bracket 1 increases by 0.5° to 5°; and / or when the sofa iron frame is switched from the TV position state to the lying position state, the angle α between the side of the backrest rod 42 close to the human body and the upper surface of the seat frame bracket 1 increases by 30° to 35°; and / or when the sofa iron frame is switched from the sitting position state to the TV position state, the angle γ between the extension line of the backrest rod 43 and the upper surface of the seat frame bracket 1 decreases by 7° to 11°; and / or when the sofa iron frame is switched from the TV position state to the lying position state, the angle γ between the extension line of the backrest rod 43 and the upper surface of the seat frame bracket 1 decreases by 30° to 40°.

[0068] Specifically, the hinge point between the second backrest rod 42 and the third backrest rod 43 is point O. When the sofa iron frame switches from the sitting position state to the TV position state, the angle α between the side of the second backrest rod 42 close to the human body and the upper surface of the seat frame bracket 1 increases by 1°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle α between the side of the second backrest rod 42 close to the human body and the upper surface of the seat frame bracket 1 increases by 32°; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the angle γ between the extension line of the third backrest rod 43 and the upper surface of the seat frame bracket 1 decreases by 9°; and / or when the sofa iron frame switches from the TV position state to the lying position state, the angle γ between the extension line of the third backrest rod 43 and the upper surface of the seat frame bracket 1 decreases by 36°.

[0069] In the sofa iron frame of the present utility model, the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the backrest mounting plate 44 is 80 mm to 120 mm; and / or the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the first backrest rod 41 and the armrest connecting rod 45 is 80 mm to 120 mm; and / or the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the armrest connecting rod 45 is 80 mm to 120 mm; and / or the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the second backrest rod 42 and the third backrest rod 43 is 50 mm to 100 mm; and / or the distance between the hinge point of the second backrest rod 42 and the third backrest rod 43 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 100 mm to 150 mm; and / or the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 80 mm to 120 mm; and / or the distance between the hinge point of the first backrest rod 41 and the armrest connecting rod 45 and the hinge point of the armrest connecting rod 45 and the armrest mounting plate 6 is 90 mm to 140 mm.

[0070] Specifically, the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the backrest mounting plate 44 is 97.4 mm; and / or the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the first backrest rod 41 and the armrest connecting rod 45 is 95.1 mm; and / or the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the armrest connecting rod 45 is 95.1 mm; and / or the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the second backrest rod 42 and the third backrest rod 43 is 72.4 mm; and / or the distance between the hinge point of the second backrest rod 42 and the third backrest rod 43 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 129.7 mm; and / or the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 96.6 mm; and / or the distance between the hinge point of the first backrest rod 41 and the armrest connecting rod 45 and the hinge point of the armrest connecting rod 45 and the armrest mounting plate 6 is 115 mm.

[0071] In the sofa iron frame of the present utility model, the ratio of the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the backrest mounting plate 44 to the distance between the hinge point of the second backrest rod 42 and the third backrest rod 43 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 0.45 - 0.65; and / or the ratio of the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the second backrest rod 42 and the third backrest rod 43 to the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 0.7 - 0.8.

[0072] Specifically, the ratio of the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the first backrest rod 41 and the backrest mounting plate 44 to the distance between the hinge point of the second backrest rod 42 and the third backrest rod 43 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 0.54; and / or the ratio of the distance between the hinge point of the first backrest rod 41 and the second backrest rod 42 and the hinge point of the second backrest rod 42 and the third backrest rod 43 to the distance between the hinge point of the first backrest rod 41 and the backrest mounting plate 44 and the hinge point of the third backrest rod 43 and the backrest mounting plate 44 is 0.75.

[0073] In the sofa iron frame of the present utility model, when the sofa iron frame switches from the sitting position state to the TV position state, the first distance L1 that the O point moves forward is 100 mm to 150 mm; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the first distance M1 that the O point moves downward is 95 mm to 110 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance L2 that the O point moves forward is 125 mm to 175 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance M2 that the O point moves upward is 70 mm to 90 mm.

[0074] Specifically, when the sofa iron frame switches from the sitting position state to the TV position state, the first distance L1 that the O point moves forward is 130.9 mm; and / or when the sofa iron frame switches from the sitting position state to the TV position state, the first distance M1 that the O point moves downward is 102.5 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance L2 that the O point moves forward is 150.8 mm; and / or when the sofa iron frame switches from the TV position state to the lying position state, the second distance M2 that the O point moves upward is 81.9 mm.

[0075] In the sofa iron frame of the present utility model, the hinge point between the backrest second rod 42 and the backrest third rod 43 is the O point, and the side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44; when the sofa iron frame is in the sitting position state, the included angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 100° to 110°; and / or the included angle γ between the extension line of the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 103° to 107°; and / or the O point is located on the side of the front end of the backrest mounting plate 44 away from the human body, and the distance N between the O point and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 60 mm to 90 mm, and the distance P between the O point and the upper surface of the seat frame bracket 1 is 110 mm to 160 mm; and / or the included angle β between the upper surface of the seat frame bracket 1 and the horizontal line is 8° to 11°; and / or the vertical distance H0 between the frontmost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is 180 mm to 230 mm; and / or the horizontal distance V between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 510 mm to 560 mm.

[0076] As Figure 14As shown, the hinge point between the backrest second rod 42 and the backrest third rod 43 is point O. The side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44. When the sofa iron frame is in the sitting position, the backrest plate 40 is on the side away from the human body at the front end of the backrest mounting plate 44; and / or the angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 105°; and / or the angle γ between the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 105°; and / or point O is on the side away from the human body at the front end of the backrest mounting plate 44, and the distance N between point O and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 75.3 mm, and the distance P between point O and the upper surface of the seat frame bracket 1 is 138.3 mm; and / or the angle β between the seat frame bracket 1 and the horizontal line is 9.6°; and / or the vertical distance H0 between the frontmost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is 204.8 mm; and / or the horizontal distance V between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 539.5 mm.

[0077] In the sofa iron frame of the present utility model, the hinge point between the backrest second rod 42 and the backrest third rod 43 is point O. The side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44. When the sofa iron frame is in the TV position, the angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 100° to 110°; and / or the angle γ between the extension line of the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 94° to 98°; and / or point O is on the side away from the human body at the front end of the backrest mounting plate 44, and the distance N between point O and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 40 mm to 65 mm, and the distance P between point O and the upper surface of the seat frame bracket 1 is 90 mm to 120 mm; and / or the angle β between the upper surface of the seat frame bracket 1 and the horizontal line is 12° to 18°; and / or the vertical distance H0 between the frontmost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is 200 mm to 260 mm; and / or the vertical distance H1 between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 330 mm to 380 mm and / or the horizontal distance V between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 1100 mm to 1150 mm.

[0078] As Figure 15As shown, the hinge point between the backrest second rod 42 and the backrest third rod 43 is point O, and the side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44; when the sofa iron frame is in the TV position, the distance between the outermost end of the backrest plate 40 close to the human body and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is equal to zero; and / or the angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 106°; and / or the angle γ between the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 96°; and / or point O is located on the side of the front end of the backrest mounting plate 44 away from the human body, and the distance N between point O and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 56.2 mm, and the distance P between point O and the upper surface of the seat frame bracket 1 is 107.2 mm; and / or the angle β between the seat frame bracket 1 and the horizontal line is 15.6°; and / or the vertical distance H0 between the frontmost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is 231.2 mm; and / or the vertical distance H1 between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 358.8 mm and / or the horizontal distance V between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 1132.1 mm.

[0079] In the sofa iron frame of the present utility model, the hinge point between the backrest second rod 42 and the backrest third rod 43 is point O, and the side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44; when the sofa iron frame is in the lying position, the angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 135° to 140°; and / or the angle γ between the extension line of the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 55° to 65°; and / or point O is located on the side of the front end of the backrest mounting plate 44 close to the human body, and the distance N between point O and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 10 mm to 30 mm, and the distance P between point O and the upper surface of the seat frame bracket 1 is 100 mm to 130 mm; and / or the vertical distance H0 between the frontmost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is greater than or equal to 300 mm; and / or the vertical distance H1 between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is greater than or equal to 550 mm and / or the horizontal distance V between the frontmost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is greater than or equal to 1100 mm.

[0080] As Figure 16As shown, the hinge point between the backrest second rod 42 and the backrest third rod 43 is point O. The side of the backrest mounting plate 44 close to the footrest mechanism 3 is the front end of the backrest mounting plate 44. When the sofa iron frame is in the lying position, the backrest plate 40 is on the side close to the human body at the front end of the backrest mounting plate 44; and / or the included angle α between the side of the backrest second rod 42 close to the human body and the upper surface of the seat frame bracket 1 is 138°; and / or the included angle γ between the backrest third rod 43 and the upper surface of the seat frame bracket 1 is 60°; and / or point O is on the side close to the human body at the front end of the backrest mounting plate 44, the distance N between point O and the front end of the backrest mounting plate 44 in the direction parallel to the upper surface of the seat frame bracket 1 is 20 mm, and the distance P between point O and the upper surface of the seat frame bracket 1 is 115 mm; and / or the vertical distance H0 between the foremost end of the upper surface of the seat frame bracket 1 and the center of the rear mounting hole of the armrest mounting plate 6 is 354.8 mm; and / or the vertical distance H1 between the foremost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 570.8 mm and / or the horizontal distance V between the foremost end of the footrest mechanism 3 and the center of the rear mounting hole of the armrest mounting plate 6 is 1161.8 mm.

[0081] The attitude switching process of the zero-gravity and zero-wall-adjacent sofa iron frame of the present utility model is as follows:

[0082] (1) As Figure 14 and Figure 15 shown, when the zero-gravity and zero-wall-adjacent sofa iron frame switches from the sitting position to the TV position, the driving component drives the first driving rod 51 to move in the direction away from the second driving rod 52, so as to push the first leg link 301 and the second leg link 302 to rotate forward, so as to unfold the footrest mechanism 3, so as to drive the first rod 21 to move backward, so as to drive the second rod 22 to rotate forward, so as to drive the fourth rod 24 to rotate forward, so as to drive the seat frame bracket 1 to move forward while the front end tilts upward; when the seat frame bracket 1 moves forward, it drives the backrest mounting plate 44 to move forward, so as to drive the middle part of the backrest first rod 41 to move forward, so as to make the top end of the backrest first rod 41 close to the backrest third rod 43, so as to drive the backrest second rod 42 to rotate around the hinge point of the backrest second rod 42 and the backrest third rod 43, so as to make the upper end of the backrest second rod 42 rotate backward, so as to make the backrest plate 40 tilt backward.

[0083] (2) As Figure 15 and Figure 16As shown, when the sofa iron frame with zero gravity and zero wall contact switches from the TV position to the lying position, the driving component drives the first driving rod 51 to continue moving away from the second driving rod 52. Since the footrest mechanism 3 has been extended to the most extended posture, the continuous extension of the driving component will drive the seat frame bracket 1 to move forward, the bottom end of the fifth rod 25 to rotate forward, and the top end of the sixth rod 26 to rotate forward, so as to drive the seventh rod 27 to move forward and drive the eighth rod 28 to rotate forward, so as to pull the front end of the third rod 23 to rise, so that the upward tilt angle of the front end of the seat frame bracket 1 becomes larger, giving the sofa a zero-gravity effect; when the seat frame bracket 1 moves forward, it drives the backrest mounting plate 44 to move forward, so as to drive the middle part of the first backrest rod 41 to move forward, so that the top end of the first backrest rod 41 approaches the third backrest rod 43, so as to drive the second backrest rod 42 to rotate around the hinge point of the second backrest rod 42 and the third backrest rod 43, so that the upper end of the second backrest rod 42 rotates backward, so that the backrest plate 40 tilts backward.

[0084] Since during the sequential switching process of the sofa iron frame from the sitting position to the TV position and then to the lying position, the backward tilt angle of the second backrest rod 42 is compensated by the forward and upward translation of the seat frame bracket 1, therefore, overall, the movement trend of the rearmost end of the second backrest rod 42 is always forward, so that when the sofa with this sofa iron frame is placed against the wall, there will be no interference between the sofa backrest and the wall during its adjustment process, thus achieving the zero-wall-contact effect.

[0085] The present utility model also provides a sofa, which includes a plurality of the above-mentioned sofa iron frames with zero gravity and zero wall contact.

[0086] Specifically, the sofa of the present utility model includes two symmetrically arranged sofa iron frames, and also includes a synchronizing rod and a backrest plate 40. The lower ends of the fifth rods 25 of the two sofa iron frames are respectively connected to both ends of the synchronizing rod, and the second backrest rods 42 of the backrest mechanisms 4 of the two sofa iron frames are respectively connected to both ends of the backrest plate 40.

[0087] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0088] The sofa iron frame with zero gravity and zero wall - leaning of the present utility model includes: a seat frame bracket 1, a suspension mechanism 2, a footrest mechanism 3, a backrest mechanism 4, a driving mechanism 5, and an armrest mounting plate 6. The footrest mechanism 3 is hinged to the seat frame bracket, the backrest mechanism 4 is respectively hinged to the seat frame bracket 1 and the armrest mounting plate 6, the driving mechanism 5 is respectively connected to the footrest mechanism 3 and the armrest mounting plate 6, and the suspension mechanism 2 is connected to the seat frame bracket 1, the footrest mechanism 3, and the armrest mounting plate 6 so that the sofa iron frame can switch between a sitting position state, a TV position state, and a lying position state. Among them, when the sofa iron frame is in the sitting position state, the footrest mechanism 3 is retracted below the seat frame bracket 1; when the sofa iron frame switches from the sitting position state to the TV position state, the footrest mechanism 3 moves forward and upward; when the sofa iron frame switches from the TV position state to the lying position state, the backrest mechanism tilts backward, and the highest point of the footrest mechanism 3 is not lower than the highest point of the backrest mechanism 4; when the sofa iron frame sequentially switches between the sitting position state, the TV position state, and the lying position state, the seat frame bracket 1 moves forward and upward, and the rearmost end of the backrest mechanism 4 has a tendency to move forward. In this way, by setting the above - mentioned sofa iron frame with zero gravity and zero wall - leaning, the present utility model can not only realize the switching of the sofa with zero gravity and zero wall - leaning between the sitting position state, the TV position state, and the lying position state, but also reduce the oppression of the connecting rod at the backrest on the cushion soft package, improving the overall comfort of the seat using the sofa iron frame with zero gravity and zero wall - leaning of the present utility model, and solving the problem that the sofas in the prior art cannot fully meet the user's usage requirements.

[0089] 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 "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0091] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0092] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations should be made for the spatial relative descriptions used here.

[0093] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0094] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sofa iron frame with zero gravity and no need to lean against the wall, characterized in that Comprising: A seat frame support (1), a suspension mechanism (2), a footrest mechanism (3), a backrest mechanism (4), a drive mechanism (5), and an armrest mounting plate (6). The footrest mechanism (3) is hinged to the seat frame support (1), the backrest mechanism (4) is respectively hinged to the seat frame support (1) and the armrest mounting plate (6), the drive mechanism (5) is respectively connected to the footrest mechanism (3) and the armrest mounting plate (6), and the suspension mechanism (2) is connected to the seat frame support (1), the footrest mechanism (3), and the armrest mounting plate (6) to enable the sofa iron frame to switch between a sitting position state, a TV position state, and a lying position state; Wherein, When the sofa iron frame is in the sitting position state, the footrest mechanism (3) is retracted below the seat frame support (1); When the sofa iron frame switches from the sitting position state to the TV position state, the footrest mechanism (3) moves forward and upward; When the sofa iron frame switches from the TV position state to the lying position state, the backrest mechanism (4) tilts backward, and the highest point of the footrest mechanism (3) is not lower than the highest point of the backrest mechanism (4); When the sofa iron frame sequentially switches between the sitting position state, the TV position state, and the lying position state, the seat frame support (1) lifts forward and upward, and the rearmost end of the backrest mechanism (4) has a tendency to move forward.

2. The zero-gravity zero-wall-touching sofa iron frame according to claim 1, wherein When the sofa iron frame switches from the sitting position state to the TV position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line increases by 2° to 10°; and / or When the sofa iron frame switches from the TV position state to the lying position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line increases by 6° to 14°; and / or When the sofa iron frame is in the lying position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line is 14° to 30°.

3. The zero-gravity zero-wall-touching sofa iron frame according to claim 1, wherein When the sofa iron frame switches from the sitting position state to the TV position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line increases by 4° to 8°; and / or When the sofa iron frame switches from the TV position state to the lying position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line increases by 8° to 11.5°; and / or When the sofa iron frame is in the lying position state, the angle β between the upper surface of the seat frame support (1) and the horizontal line is 20° to 26°.

4. The zero-gravity and zero-wall-contact sofa iron frame according to any one of claims 1 to 3, characterized in that, The suspension mechanism (2) includes: A first link assembly, in which multiple links are sequentially connected to the seat frame support (1) and form a loop; A second link assembly, in which multiple links are sequentially connected to the armrest mounting plate (6) and form a loop; A linkage rod assembly, which is used to connect the pedal mechanism (3) and the first linkage rod assembly, and is also used to connect the first linkage rod assembly and the second linkage rod assembly.

5. The iron frame of the zero-gravity zero-wall-touching sofa according to claim 4, characterized in that The first linkage rod assembly includes a second rod (22), a third rod (23) and a fourth rod (24), and the seat frame bracket (1), the second rod (22), the third rod (23) and the fourth rod (24) are connected in sequence; wherein, the distance between the hinge point of the second rod (22) and the seat frame bracket (1) and the hinge point of the second rod (22) and the third rod (23) is in a ratio of 0.91 to 1.1 to the distance between the hinge point of the fourth rod (24) and the seat frame bracket (1) and the hinge point of the fourth rod (24) and the third rod (23); The second linkage rod assembly includes a sixth rod (26) and an eighth rod (28) respectively connected to the armrest mounting plate (6), and a seventh rod (27) or multiple linkage rods are connected between the sixth rod (26) and the eighth rod (28) at the same time; the linkage rod assembly includes a ninth rod (29) and a tenth rod (210), and both ends of the ninth rod (29) are respectively hinged to the front end of the third rod (23) and the middle lower part of the eighth rod (28); both ends of the tenth rod (210) are respectively hinged to the upper end of the eighth rod (28) and the middle part of the third rod (23); wherein, the distance between the hinge point of the eighth rod (28) and the armrest mounting plate (6) and the hinge point of the eighth rod (28) and the ninth rod (29) is in a ratio of 0.35 to 0.4 to the distance between the hinge point of the eighth rod (28) and the armrest mounting plate (6) and the hinge point of the eighth rod (28) and the tenth rod (210).

6. The zero-gravity and zero-wall-adjacent sofa iron frame according to any one of claims 1 to 3, characterized in that, The backrest mechanism (4) includes a first backrest rod (41), a second backrest rod (42), a third backrest rod (43) and a backrest mounting plate (44), and the first backrest rod (41), the second backrest rod (42), the third backrest rod (43) and the backrest mounting plate (44) are connected in sequence and enclose a loop. The first backrest rod (41) is used for being hinged to the armrest mounting plate (6), the second backrest rod (42) is used for being connected to the backrest plate (40) of the sofa including the iron frame of the sofa, and the backrest mounting plate (44) is fixedly connected to the seat frame bracket (1).

7. The sofa iron frame with zero gravity and zero wall dependence according to claim 6, characterized in that, The hinge point between the second backrest rod (42) and the third backrest rod (43) is point O, wherein When the iron frame of the sofa switches from the sitting posture state to the TV posture state, the angle α between the side of the second backrest rod (42) close to the human body and the upper surface of the seat frame bracket (1) increases by 0.5° to 5°; and / or When the iron frame of the sofa switches from the TV posture state to the lying posture state, the angle α between the side of the second backrest rod (42) close to the human body and the upper surface of the seat frame bracket (1) increases by 30° to 35°; and / or When the sofa iron frame switches from the sitting posture state to the TV posture state, the included angle γ between the extension line of the backrest three-bar (43) and the upper surface of the seat frame bracket (1) decreases by 7° to 11°; and / or When the sofa iron frame switches from the TV posture state to the lying posture state, the included angle γ between the extension line of the backrest three-bar (43) and the upper surface of the seat frame bracket (1) decreases by 30° to 40°; and / or When the sofa iron frame switches from the sitting posture state to the TV posture state, the first distance L1 that the O point moves forward is 100 mm to 150 mm; and / or When the sofa iron frame switches from the sitting posture state to the TV posture state, the first distance M1 that the O point moves downward is 95 mm to 110 mm; and / or When the sofa iron frame switches from the TV posture state to the lying posture state, the second distance L2 that the O point moves forward is 125 mm to 175 mm; and / or When the sofa iron frame switches from the TV posture state to the lying posture state, the second distance M2 that the O point moves upward is 70 mm to 90 mm.

8. The sofa iron frame with zero gravity and zero wall contact according to claim 6, characterized in that The hinge point between the backrest two-bar (42) and the backrest three-bar (43) is the O point, and the side of the backrest mounting plate (44) close to the footrest mechanism (3) is the front end of the backrest mounting plate (44); when the sofa iron frame is in the sitting posture state, The included angle α between the side of the backrest two-bar (42) close to the human body and the upper surface of the seat frame bracket (1) is 100° to 110°; and / or The included angle γ between the extension line of the backrest three-bar (43) and the upper surface of the seat frame bracket (1) is 103° to 107°; and / or The O point is located on the side of the front end of the backrest mounting plate (44) away from the human body. The distance N between the O point and the front end of the backrest mounting plate (44) in the direction parallel to the upper surface of the seat frame bracket (1) is 60 mm to 90 mm, and the distance P between the O point and the upper surface of the seat frame bracket (1) is 110 mm to 160 mm; and / or The included angle β between the upper surface of the seat frame bracket (1) and the horizontal line is 8° to 11°.

9. The sofa iron frame with zero gravity and zero wall support according to claim 8, characterized in that, The hinge point between the backrest two-bar (42) and the backrest three-bar (43) is the O point, and the side of the backrest mounting plate (44) close to the footrest mechanism (3) is the front end of the backrest mounting plate (44); when the sofa iron frame is in the TV posture state, The included angle α between the side of the backrest two-bar (42) close to the human body and the upper surface of the seat frame bracket (1) is 100° to 110°; and / or The included angle γ between the extension line of the backrest three-bar (43) and the upper surface of the seat frame bracket (1) is 94° to 98°; and / or The point O is located on the side away from the human body at the front end of the backrest mounting plate (44). The distance N between the point O and the front end of the backrest mounting plate (44) in the direction parallel to the upper surface of the seat frame bracket (1) is 40 mm to 65 mm, and the distance P between the point O and the upper surface of the seat frame bracket (1) is 90 mm to 120 mm; and / or The included angle β between the upper surface of the seat frame bracket (1) and the horizontal line is 12° to 18°; and / or The vertical distance H1 between the foremost end of the footrest mechanism (3) and the center of the rear mounting hole of the armrest mounting plate (6) is 330 mm to 380 mm.

10. The sofa iron frame with zero gravity and zero wall contact according to claim 6, characterized in that, The hinge point between the backrest second rod (42) and the backrest third rod (43) is the point O. The side of the backrest mounting plate (44) close to the footrest mechanism (3) is the front end of the backrest mounting plate (44); when the sofa iron frame is in the lying posture, The included angle α between the side of the backrest second rod (42) close to the human body and the upper surface of the seat frame bracket (1) is 135° to 140°; and / or The included angle γ between the extension line of the backrest third rod (43) and the upper surface of the seat frame bracket (1) is 55° to 65°; and / or The point O is located on the side close to the human body at the front end of the backrest mounting plate (44). The distance N between the point O and the front end of the backrest mounting plate (44) in the direction parallel to the upper surface of the seat frame bracket (1) is 10 mm to 30 mm, and the distance P between the point O and the upper surface of the seat frame bracket (1) is 100 mm to 130 mm; and / or The vertical distance H1 between the foremost end of the footrest mechanism (3) and the center of the rear mounting hole of the armrest mounting plate (6) is greater than or equal to 550 mm.

11. A sofa, comprising the zero-gravity zero-wall-touching sofa iron frame according to any one of claims 1 to 10.

Images