Backrest structure, armrest floor stand and zero-gravity armrest floor sofa

Abstract

The utility model provides a backrest structure, an armrest floor stand and a zero-gravity armrest floor sofa. The backrest structure is used for being connected with a seat support, the seat support comprises an installation part and a base frame capable of moving relative to the installation part, and the backrest structure comprises a backrest installation part; the connecting assembly is hinged with one end of the backrest mounting piece and is respectively hinged with the mounting piece and the base frame; the linkage assembly comprises a first linkage rod and a second linkage rod which are hinged to each other, one end of the first linkage rod is hinged to the other end of the backrest mounting piece, and one end of the second linkage rod is hinged to the base frame; wherein the linkage assembly is connected with a limiting part, when the base frame moves, the backrest installation piece is driven to move from the containing position to the backward leaning position through the connecting assembly and the linkage assembly, and the linkage assembly is limited through the limiting part; the problem that in the prior art, a backrest piece of an armrest landing subway frame is connected with a seat frame only through a linkage rod or without a linkage rod, and consequently the smoothness of a backrest structure is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent furniture, and particularly to a backrest structure, an armrest floor bracket and a zero-gravity armrest floor sofa. Background Art

[0002] At present, a general movable sofa includes a functional iron frame (also called a mechanical stretching device). The functional iron frame includes a seat frame and a main body mechanism for adjusting the front and rear positions of the seat frame. The seat frame and the main body mechanism are also connected with a backrest, a footrest and other mechanisms at the same time. Soft packages are partitioned and arranged on corresponding structures, and finally, soft package seats, soft package backrests, soft package footrests and other structures of the sofa are formed. A linear driver is also arranged on the functional iron frame to drive the overall functional iron frame to perform three-position transformation or two-position transformation between a sitting position, a leisure position (also called a TV position) and a lying position, so as to drive the movable sofa to perform three-position transformation or two-position transformation. Among them, for the functional iron frame with a lying position, its backrest mechanism includes a backrest pad for connecting the backrest cushion. The backrest cushion is connected to the seat frame through a linkage rod. When the linear driver is adjusted, the backrest mechanism will be driven to move, and thus the posture changes such as the falling down and standing upright of the backrest cushion are realized.

[0003] However, when the backrest cushion moves forward a large distance in the lying position, the lodging situation of the linkage rod is obvious. In this case, the linkage rod is not easy to lift when restoring to the TV position, which easily affects the smoothness of the overall movement of the iron frame. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a backrest structure, an armrest floor bracket and a zero-gravity armrest floor sofa, so as to solve the problem that the backrest member of the existing armrest floor iron frame is only connected to the seat frame through a linkage rod or without a linkage rod, resulting in low smoothness of the backrest structure.

[0005] To achieve the above purpose, according to one aspect of the utility model, a backrest structure is provided for connecting with a seat bracket. The seat bracket includes a mounting member and a base frame movable relative to the mounting member. The backrest structure includes: a backrest mounting member; a connecting component, which is hinged to one end of the backrest mounting member and respectively hinged to the mounting member and the base frame; a linkage component, which includes a first linkage rod and a second linkage rod hinged to each other. One end of the first linkage rod far from the second linkage rod is hinged to the other end of the backrest mounting member, and one end of the second linkage rod far from the first linkage rod is hinged to the base frame; wherein, a limiting member is connected to the linkage component. The backrest mounting member has a storage position retracted relative to the armrest mounting plate and a reclined position inclined relative to the mounting member, so as to drive the backrest mounting member to move from the storage position to the reclined position through the connecting component and the linkage component when the base frame moves, and enable the limiting member to limit the linkage component.

[0006] Further, the limiting member includes a third linkage rod. One end of the third linkage rod is hinged to the base frame, and the other end of the third linkage rod is hinged to the first linkage rod or the second linkage rod.

[0007] Further, the second linkage rod is in a bent rod shape so as to avoid the third linkage rod when the backrest mounting member is in the reclined position.

[0008] Further, the connecting assembly includes a first connecting rod and a second connecting rod which are hinged to each other. One end of the first connecting rod away from the second connecting rod is hinged to the backrest mounting member, the middle part of the first connecting rod is hinged to the base frame, and one end of the second connecting rod away from the first connecting rod is hinged to the mounting member.

[0009] According to another aspect of the present invention, there is provided an armrest floor bracket, which includes an armrest mounting plate and a base frame movable relative to the armrest mounting plate, and further includes: the backrest structure mentioned above; a suspension structure; which are respectively connected to the armrest mounting plate and the base frame, and the backrest structure is connected to the base frame; a footrest structure, which is respectively connected to the suspension structure and the base frame.

[0010] Further, the suspension structure includes: a movable assembly movably connected to the base frame; a motion assembly movably connected to the armrest mounting plate and linked to the movable assembly through a linkage member.

[0011] Further, the movable assembly includes a first movable rod, a second movable rod, a third movable rod and a linkage adjusting rod. One ends of the second movable rod and the third movable rod are respectively hinged to two ends of the first movable rod, the other ends of the second movable rod and the third movable rod are respectively hinged to the base frame, one end of the linkage adjusting rod is hinged to any one of the first movable rod, the second movable rod and the third movable rod, and the other end of the linkage adjusting rod is connected to the footrest structure; the motion assembly includes a first motion rod, a second motion rod and a third motion rod which are sequentially hinged to each other. One ends of the first motion rod and the third motion rod away from the second motion rod are respectively hinged to the armrest mounting plate.

[0012] Further, the linkage member includes: a first linkage member, a second linkage member and a third linkage member. One end of the first linkage member is hinged to the middle part of the third motion rod, and the other end of the first linkage member is hinged to one end of the first movable rod near its hinge point with the third movable rod; one end of the second linkage member is hinged to the middle part of the first motion rod, and the other end of the second linkage member is hinged to one end of the first movable rod near its hinge point with the second movable rod; one end of the third linkage member is hinged to one end of the first motion rod near its hinge point with the second motion rod, and the other end of the third linkage member is hinged to the middle part of the first movable rod.

[0013] Further, when the backrest mounting member is in the reclined position, the first included angle A between the backrest mounting member and the base frame satisfies: 115° ≤ A ≤ 138°, and the second included angle B between the base frame and the horizontal direction satisfies: 14° ≤ B ≤ 30°; alternatively, when the backrest mounting member is in the reclined position, the preset distance L between the position of the footrest structure extended to the highest point in the vertical direction and the highest point position of the hinge point between the backrest mounting member and the first linkage rod satisfies: 2.8 cm ≤ L ≤ 5 cm.

[0014] According to another aspect of the present invention, there is provided a zero-gravity armrest floor sofa, including the armrest floor bracket mentioned above.

[0015] Applying the technical solution of the present invention, the backrest structure is used to connect with the seat bracket. The seat bracket includes a mounting member and a base frame movable relative to the mounting member. The backrest structure includes a backrest mounting member, a connecting component, and a linkage component; the connecting component is hinged to one end of the backrest mounting member and is respectively hinged to the mounting member and the base frame; the linkage component includes a first linkage rod and a second linkage rod hinged to each other. The end of the first linkage rod away from the second linkage rod is hinged to the other end of the backrest mounting member, and the end of the second linkage rod away from the first linkage rod is hinged to the base frame; wherein, a limiting member is connected to the linkage component. The backrest mounting member has a storage position retracted relative to the armrest mounting plate and a reclined position inclined relative to the armrest mounting plate, so as to drive the backrest mounting member to move from the storage position to the reclined position through the connecting component and the linkage component when the base frame moves, and the limiting member limits the linkage component. With the above arrangement, the backrest mounting member and the base frame are connected by the first linkage rod and the second linkage rod, so that the linkage component and the base frame are connected by two hinged linkage rods. In this way, when the backrest mounting member moves from the storage position to the reclined position, when the first linkage rod and the second linkage rod follow the backrest mounting member to move, the limiting member respectively limits and supports the first linkage rod and the second linkage rod, making the overall backrest structure more stable and having better support performance; and, when the backrest mounting member is in the reclined position, the included angles between the first linkage rod and the second linkage rod and the base frame are not too small, so that the first linkage rod and the second linkage rod can be more easily lifted when the backrest mounting member switches from the lying position to the TV position, which is beneficial to the smoother operation of the posture switching, thereby solving the problem that the backrest member of the existing armrest floor iron frame is connected to the seat frame only by one linkage rod or without a linkage rod, resulting in a lower smoothness of the backrest structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 Shows a schematic structural view in a sitting position provided by an embodiment of an armrest floor bracket according to the present utility model;

[0018] Figure 2 Shows a schematic structural view in a TV position provided by an embodiment of an armrest floor bracket according to the present utility model;

[0019] Figure 3 Shows a schematic structural view of a first perspective in a lying position provided by an embodiment of an armrest floor bracket according to the present utility model;

[0020] Figure 4 Shows a schematic structural view of a second perspective in a lying position provided by an embodiment of an armrest floor bracket according to the present utility model.

[0021] Wherein, the above-mentioned drawings include the following reference numerals:

[0022] 10, backrest structure; 11, backrest mounting member; 12, connection assembly; 13, linkage assembly; 14, first linkage rod; 15, second linkage rod; 16, third linkage rod; 17, first connecting rod; 18, second connecting rod; 19, backrest pad; 20, armrest mounting plate; 30, base frame; 40, suspension structure; 50, footrest structure; 51, first link; 52, second link; 53, third link; 54, fourth link; 55, first footrest member; 551, first section; 552, second section; 56, second footrest member; 60, movable assembly; 61, first movable rod; 62, second movable rod; 63, third movable rod; 64, linkage adjustment rod; 70, motion assembly; 71, first motion rod; 72, second motion rod; 73, third motion rod; 80, linkage member; 81, first linkage member; 82, second linkage member; 83, third linkage member. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] In order to solve the problem that the backrest member of the existing armrest floor iron frame is connected to the seat frame only through one linkage rod or without a linkage rod, resulting in a low smoothness of the backrest structure. The present utility model provides a backrest structure, an armrest floor bracket and a zero-gravity armrest floor sofa.

[0025] Please refer to Figures 1 to 4As shown, in one aspect of the technical solution of the present utility model, a backrest structure 10 is provided for connecting with a seat bracket. The seat bracket includes a mounting member and a base frame 30 that is movable relative to the mounting member. The backrest structure 10 includes a backrest mounting member 11, a connecting assembly 12, and a linkage assembly 13. The connecting assembly 12 is hinged to one end of the backrest mounting member 11 and is respectively hinged to the mounting member and the base frame 30. The linkage assembly 13 includes a first linkage rod 14 and a second linkage rod 15 that are hinged to each other. One end of the first linkage rod 14 away from the second linkage rod 15 is hinged to the backrest mounting member 11, and one end of the second linkage rod 15 away from the first linkage rod 14 is respectively hinged to the base frame 30. Among them, a limiting member is connected to the linkage assembly 13. The backrest mounting member 11 has a storage position retracted relative to the mounting member and a reclined position inclined relative to the armrest mounting plate 20, so that when the base frame 30 moves, the backrest mounting member 11 is driven by the connecting assembly 12 and the linkage assembly 13 to move from the storage position to the reclined position, and the limiting member limits the linkage assembly 13.

[0026] In one aspect of the technical solution applied to this embodiment, the backrest mounting member 11 and the base frame 30 are connected by the first linkage rod 14 and the second linkage rod 15, so that the linkage assembly 13 and the base frame 30 are connected by two hinged linkage rods. In this way, when the backrest mounting member 11 moves from the storage position to the reclined position, when the first linkage rod 14 and the second linkage rod 15 follow the backrest mounting member 11 to move, the limiting member respectively provides limiting support for the first linkage rod 14 and the second linkage rod 15, making the overall backrest structure 10 more stable and having better support performance. And when the backrest mounting member 11 is in the reclined position, the angles between the first linkage rod 14 and the second linkage rod 15 and the base frame 30 will not be too small, so that the first linkage rod 14 and the second linkage rod 15 can be more easily lifted when the backrest mounting member 11 switches from the lying position to the TV position, which is beneficial to the smoother operation of the posture switching, thus solving the problem that the backrest member of the armrest landing iron frame in the prior art is only connected to the seat frame by one linkage rod or without a linkage rod, resulting in a lower smoothness of the backrest structure 10.

[0027] In this embodiment, the limiting member includes a third linkage rod 16. One end of the third linkage rod 16 is hinged to the base frame 30, and the other end of the third linkage rod 16 is hinged to the middle of the first linkage rod 14 or the middle of the second linkage rod 15. In this way, when switching from the TV position to the lying position, due to the structural arrangement that the second linkage rod 15 and the third linkage rod 16 are respectively hinged to the first linkage rod 14, the first linkage rod 14 drives the third linkage rod 16 and the second linkage rod 15 to rotate simultaneously and support the backrest mounting member 11, making its force-bearing performance better, so that the backrest is more stable. And when the first linkage rod 14 and the second linkage rod 15 rotate to the position where the backrest mounting member 11 is in the reclined position, the third linkage rod 16 limits the movement of the first linkage rod 14 and the second linkage rod 15, and makes the structure of the linkage assembly 13 more stable; at the same time, when the third linkage rod 16 rotates a small angle, it can drive the front end of the backrest mounting member 11 to move forward a greater distance through the first linkage rod 14, so that the backrest mounting member 11 has the possibility of moving forward a greater distance in design. It should be noted that the specific connection positions between the third linkage rod 16, the second linkage rod 15 and the first linkage rod 14 are not limited to this, and the corresponding connection positions can be selected according to the usage requirements of different functions and the actual working conditions, which is more free in design and has strong practicability.

[0028] Specifically, the second linkage rod 15 is in a bent rod shape to avoid the third linkage rod 16 when the backrest mounting member 11 is in the reclined position, and the hinge point of the third linkage rod 16 and the base frame 30 is located at the bent part of the second linkage rod 15. In this way, when switching from the TV position to the lying position, the third linkage rod 16 and the second linkage rod 15 rotate synchronously, and then the bent rod-shaped second linkage rod 15 avoids the hinge point of the third linkage rod 16 and the base frame 30. At the same time, its hinge point is located at the bent part of the second linkage rod 15, so that when the backrest mounting member 11 returns from the lying position to the TV position, the third linkage rod 16 can be more easily lifted.

[0029] As Figure 3 shown, the connecting assembly 12 includes a first connecting rod 17 and a second connecting rod 18 that are hinged to each other. One end of the first connecting rod 17 away from the second connecting rod 18 is hinged to the backrest mounting member 11, the middle of the first connecting rod 17 is hinged to the base frame 30, and one end of the second connecting rod 18 away from the first connecting rod 17 is hinged to the armrest mounting plate 20. With the above arrangement, the first connecting rod 17 is in a bent rod shape. In this way, when switching from the TV position to the lying position, the base frame 30 moves forward and upward, so that the first connecting rod 17 and the second connecting rod 18 drive the backrest mounting member 11 to move from the storage position to the reclined position inclined relative to the armrest mounting plate 20.

[0030] In this embodiment, an extension portion is provided at one end of the base frame 30 close to the backrest structure 10, and the middle portions of the third linkage rod 16, the second linkage rod 15, and the first connecting rod 17 are respectively hinged to the extension portion on the base frame 30.

[0031] On the other hand, applying the technical solution of the present utility model provides an armrest floor bracket, which includes an armrest mounting plate 20 and a base frame 30 that is movable relative to the armrest mounting plate 20, and further includes the above-mentioned backrest structure 10, suspension structure 40, and footrest structure 50; the suspension structure 40 is respectively connected to the armrest mounting plate 20 and the base frame 30, and the backrest structure 10 is connected to the base frame 30; the footrest structure 50 is respectively connected to the suspension structure 40 and the base frame 30.

[0032] In this embodiment, the direction from the backrest structure 10 to the footrest structure 50 is the forward direction, and the direction from the footrest structure 50 to the backrest structure 10 is the backward direction.

[0033] In this embodiment, the footrest structure 50 includes two sets of link members, a first footrest member 55, and a second footrest member 56; the two sets of link members are arranged alternately. One set of link members includes a first link 51 and a second link 52 that are hinged to each other, and the other set of link members includes a third link 53 and a fourth link 54 that are hinged to each other. The middle portion of the second link 52 is hinged to the middle portion of the third link 53. One end of the first link 51 away from the second link 52 and one end of the third link 53 away from the fourth link 54 are respectively hinged to the base frame 30. The first footrest member 55 includes a first section 551 and a second section 552 that are connected to each other. The second footrest member 56 is hinged to the first section 551. One end of the fourth link 54 away from the third link 53 is respectively hinged to the second footrest member 56 and the second section 552; wherein, the first section 551 and the second section 552 are arranged at an angle to each other.

[0034] In this embodiment, the armrest floor bracket further includes a driving assembly. The driving assembly includes a driving member and a driving piece connected to the driving end of the driving member. The driving member is connected to the armrest mounting plate 20 through a connecting rod, and the driving member is a linear driver. The large head (motor end) of the driving member is arranged upward, and this motor end is connected to the rod body of the rod-shaped driving piece. The driving piece can be selectively connected to one of the link members in the two sets of link members to drive the footrest structure 50 to extend or contract.

[0035] In the above setting, the first link 51 and the second link 52, and the third link 53 and the fourth link 54 are all arranged at a preset angle. The preset angle a satisfies: 30° ≤ a ≤ 120°, and the two sets of link members together form two planar quadrilateral structures. The first footrest member 55 and the second footrest member 56 are respectively used to support the user's legs. In this way, after the driving component applies a driving force to a link through the driving member, when the footrest structure 50 performs an extension or contraction movement, the first link 51 and the third link 53 are respectively infinitely close to being parallel to the second link 52 and the fourth link 54. Its overall structure is stable and operates smoothly, and while the two planar quadrilateral structures are unfolded in sequence, the first footrest member 55 and the second footrest member 56 are driven to unfold.

[0036] In this embodiment, the first footrest member 55 and the second footrest member 56 are respectively detachably connected to the links through bolts or self-tapping screws or other means.

[0037] It should be noted that in this embodiment, the number of groups of link members is not limited to this, and can be selected according to the usage requirements and actual working conditions. Optionally, the link members are one group, or three groups, or four groups, or five groups, or multiple groups.

[0038] Specifically, the footrest structure 50 further includes a limit protrusion, and the limit protrusion can be selectively arranged on one of the links of the two sets of link members, the first footrest member 55, the second footrest member 56, and the base frame 30, so that when the footrest structure 50 extends to the first preset position, the limit protrusion is in limit cooperation with one of the first link 51, the second link 52, the third link 53, and the fourth link 54 that is close to it. In this way, when the footrest structure 50 extends to the first preset position and the first link 51 and the second link 52, and the third link 53 and the fourth link 54 are all in the limit state of 120°, the limit protrusion abuts against any one of the links to keep the footrest structure 50 in the limit extension state and enhance the overall stability of the footrest structure 50.

[0039] In this embodiment, the suspension structure 40 includes a movable component 60 and a motion component 70; the movable component 60 is movably connected to the base frame 30; the motion component 70 is movably connected to the armrest mounting plate 20 and is linked to the movable component 60 through a linkage component 80. In this way, when switching from the sitting position to the TV position, the driving component of the linear actuator continuously extends to drive the driving member to move, so that the footrest structure 50 extends to the first preset position and the limit protrusion abuts against one of the links, so that the footrest structure 50 no longer continues to extend. When switching from the TV position to the lying position, the driving component of the linear actuator continues to extend to drive the base frame 30 to move significantly forward, and then under the linkage of the movable component 60 and the motion component 70, the backrest structure 10 moves from the storage position to the reclined position.

[0040] Specifically, the movable component 60 includes a first movable rod 61, a second movable rod 62, a third movable rod 63, and a linkage adjusting rod 64. One end of the second movable rod 62 and the third movable rod 63 are respectively hinged to both ends of the first movable rod 61, and the other ends of the second movable rod 62 and the third movable rod 63 are respectively hinged to the base frame 30. One end of the linkage adjusting rod 64 is hinged to any one of the first movable rod 61, the second movable rod 62, and the third movable rod 63, and the other end of the linkage adjusting rod 64 is connected to the foot pedal assembly. With the above settings, one end of the linkage adjusting rod 64 is connected to the first movable rod 61, that is, the first movable rod 61, the second movable rod 62, the third movable rod 63, and the base frame 30 form a quadrilateral linkage structure. Both ends of the linkage adjusting rod 64 are respectively connected to this quadrilateral linkage structure and the foot pedal structure 50. In this way, when the linkage adjusting rod 64 rotates, the linkage between the suspension structure 40 and the foot pedal structure 50 can be realized.

[0041] Specifically, the motion component 70 includes a first motion rod 71, a second motion rod 72, and a third motion rod 73 that are sequentially hinged. One ends of the first motion rod 71 and the third motion rod 73 away from the second motion rod 72 are respectively hinged to the armrest mounting plate 20. With the above settings, the first motion rod 71, the second motion rod 72, the third motion rod 73, and the armrest mounting plate 20 form a quadrilateral linkage structure. This quadrilateral linkage structure is connected to the quadrilateral linkage structure formed by the first movable rod 61, the second movable rod 62, the third movable rod 63, and the base frame 30 through a linkage component 80. In this way, the linkage between the movable component 60 and the motion component 70 can be realized.

[0042] As Figure 3 and Figure 4 shown, the linkage component 80 includes a first linkage 81, a second linkage 82, and a third linkage 83. One end of the first linkage 81 is hinged to the middle of the third motion rod 73, and the other end of the first linkage 81 is hinged to one end of the first movable rod 61 near its hinge point with the third movable rod 63. One end of the second linkage 82 is hinged to the middle of the first motion rod 71, and the other end of the second linkage 82 is hinged to one end of the first movable rod 61 near its hinge point with the second movable rod 62. One end of the third linkage 83 is hinged to one end of the first motion rod 71 near its hinge point with the second motion rod 72, and the other end of the third linkage 83 is hinged to the middle of the first movable rod 61. In this way, the linkage between the movable component 60 and the motion component 70 can be realized.

[0043] In this embodiment, when the backrest mounting member 11 is in the reclined position, the first angle A between the backrest mounting member 11 and the base frame 30 satisfies: 115° ≤ A ≤ 138°, and the second angle B between the base frame 30 and the horizontal direction satisfies: 14° ≤ B ≤ 30°; alternatively, when the backrest mounting member 11 is in the reclined position, the preset distance L between the position where the footrest structure 50 extends to the highest point in the vertical direction and the highest point position of the hinge point between the backrest mounting member 11 and the first linkage rod 14 satisfies: 2.8 cm ≤ L ≤ 5 cm. Preferably, the first angle A is 127° and the second angle B is 23°. With the above settings, when the angle between the backrest mounting member 11 and the base frame 30 satisfies the first angle A and the angle between the base frame 30 and the horizontal direction satisfies the second angle B, or when the distance between the position where the footrest structure 50 extends to the highest point and the highest point position of the hinge point between the backrest mounting member 11 and the first linkage rod 14 satisfies the preset distance L, the armrest floor bracket has a zero-gravity function. In this way, while the user's body is in a lying position, it can also simulate the angle of a space capsule, making the user's legs slightly higher than the heart to relieve the pressure on the spine and joints, allowing people to freely enjoy a zero-pressure relaxation state.

[0044] In this embodiment, a backrest pad 19 is connected to the backrest mounting member 11, and the first angle A between the backrest mounting member 11 and the base frame 30 is the angle between the connecting line between the centers of the two connecting holes on the backrest mounting member 11 where it is respectively connected to the backrest pad 19 and the extension line of the base frame 30.

[0045] In this embodiment (not shown in the drawings), by adjusting the overall structure or size of the armrest floor bracket, the armrest floor bracket can be made to have the function of zero-wall contact. Specifically, through the structural arrangement that the second linkage rod 15 and the third linkage rod 16 are respectively hinged to the first linkage rod 14, when the backrest pad 19 of the sofa is placed against the wall in the sitting position, and during the posture adjustment process of the sofa, the front end of the backrest mounting member 11 can move forward a greater distance, so that the backrest pad 19 of the sofa will never interfere with the wall, thus realizing zero-wall contact. The above settings require that when the posture of the sofa is adjusted to the lying position, the backrest pad 19 needs to move forward a greater distance to prevent the reclined backrest pad 19 from interfering with the wall, that is, when the third linkage rod 16 of the backrest structure 10 swings at a small angle, the front end of the backrest mounting member 11 can be driven by the first linkage rod 14 to move forward a greater distance.

[0046] Applied to another aspect of the present invention, a zero-gravity armrest floor sofa is provided, including the above-mentioned armrest floor bracket.

[0047] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0048] The backrest structure 10 is used to connect with a seat bracket. The seat bracket includes a mounting member and a base frame 30 that is movable relative to the mounting member. The backrest structure 10 includes a backrest mounting member 11, a connecting assembly 12, and a linkage assembly 13. The connecting assembly 12 is hinged to one end of the backrest mounting member 11 and is respectively hinged to the mounting member and the base frame 30. The linkage assembly 13 includes a first linkage rod 14 and a second linkage rod 15 that are hinged to each other. One end of the first linkage rod 14 away from the second linkage rod 15 is hinged to the backrest mounting member 11, and one end of the second linkage rod 15 away from the first linkage rod 14 is respectively hinged to the base frame 30. Among them, a limiting member is connected to the linkage assembly 13. The backrest mounting member 11 has a storage position retracted relative to the mounting member and a reclined position inclined relative to the armrest mounting plate 20. When the base frame 30 moves, the backrest mounting member 11 is driven by the connecting assembly 12 and the linkage assembly 13 to move from the storage position to the reclined position, and the limiting member limits the linkage assembly 13. With the above arrangement, the backrest mounting member 11 and the base frame 30 are connected by the first linkage rod 14 and the second linkage rod 15, so that the linkage assembly 13 and the base frame 30 are connected by two hinged linkage rods. In this way, when the backrest mounting member 11 moves from the storage position to the reclined position, when the first linkage rod 14 and the second linkage rod 15 follow the backrest mounting member 11 to move, the limiting member respectively limits and supports the first linkage rod 14 and the second linkage rod 15, making the overall backrest structure 10 more stable and having better support performance. And, when the backrest mounting member 11 is in the reclined position, the included angles between the first linkage rod 14 and the second linkage rod 15 and the base frame 30 will not be too small, so that the first linkage rod 14 and the second linkage rod 15 can be more easily lifted when the backrest mounting member 11 switches from the lying position to the TV position, which is beneficial to the smoother operation of the posture switching, thus solving the problem that the backrest member of the armrest landing iron frame in the prior art is only connected to the seat frame by a single linkage rod or without a linkage rod, resulting in a lower smoothness of the backrest structure 10.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] 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 utility model. At the same time, it should be understood that, for the sake of 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, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar 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.

[0051] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation terms 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, and thus should not be construed as limiting the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure 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 figure 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 corresponding interpretations should be made for the spatial relative descriptions used here.

[0053] 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, the present utility model can have various changes and modifications. 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 backrest structure for connecting to a seat frame, the seat frame comprising a mounting member and a base frame (30) movable relative to the mounting member, characterized in that: The backrest structure (10) comprises: Backrest mounting member (11); A connecting assembly (12) is hingedly connected to one end of the backrest mounting member (11) and is respectively hingedly connected to the mounting member and the base frame (30); A linkage assembly (13) comprises a first linkage rod (14) and a second linkage rod (15) which are hinged to each other, wherein one end of the first linkage rod (14) away from the second linkage rod (15) is hinged to the other end of the backrest mounting member (11), and one end of the second linkage rod (15) away from the first linkage rod (14) is hinged to the base frame (30); The linkage assembly (13) is connected to a limiting component, and the backrest mounting member (11) has a storage position retracted relative to the mounting member and a reclining position inclined relative to the mounting member, so that when the base frame (30) moves, the backrest mounting member (11) is driven to move from the storage position to the reclining position through the connection assembly (12) and the linkage assembly (13), and the limiting component limits the linkage assembly (13).

2. The backrest structure according to claim 1, characterized in that: The limiting component comprises a third linkage rod (16), one end of the third linkage rod (16) is hinged to the base frame (30), and the other end of the third linkage rod (16) is hinged to the first linkage rod (14) or the second linkage rod (15).

3. The backrest structure according to claim 2, characterized in that: The second linkage rod (15) is in the shape of a bent rod so as to avoid being arranged in the way of the third linkage rod (16) when the backrest mounting member (11) is in the reclining position.

4. The backrest structure according to claim 1, characterized in that: The connection assembly (12) comprises: A first connecting rod (17) and a second connecting rod (18) are hingedly connected, wherein one end of the first connecting rod (17) away from the second connecting rod (18) is hingedly connected to the backrest mounting member (11), the middle part of the first connecting rod (17) is hingedly connected to the base frame (30), and one end of the second connecting rod (18) away from the first connecting rod (17) is hingedly connected to the mounting member.

5. An armrest floor stand, comprising an armrest mounting plate (20) and a base frame (30) movable relative to the armrest mounting plate (20), characterized in that: The handrail floor bracket also includes: The backrest structure (10) according to any one of claims 1 to 4; The suspension structure (40) is connected to the armrest mounting plate (20) and the base frame (30) respectively, and the backrest structure (10) is connected to the base frame (30); The footrest structure (50) is connected to the suspension structure (40) and the base frame (30) respectively.

6. The handrail floor stand according to claim 5, characterized in that: The suspension structure (40) comprises: A movable assembly (60) movably connected to the base frame (30); The moving component (70) is movably connected to the armrest mounting plate (20) and is linked to the movable component (60) via a linkage component (80).

7. The handrail floor stand according to claim 6, characterized in that: The movable assembly (60) comprises a first movable rod (61), a second movable rod (62), a third movable rod (63) and a linkage adjustment rod (64); one end of the second movable rod (62) and the third movable rod (63) are respectively hinged to two ends of the first movable rod (61); the other ends of the second movable rod (62) and the third movable rod (63) are respectively hinged to the base frame (30); one end of the linkage adjustment rod (64) is hinged to any one of the first movable rod (61), the second movable rod (62) and the third movable rod (63); the other end of the linkage adjustment rod (64) is connected to the footrest structure (50); The motion assembly (70) comprises a first motion rod (71), a second motion rod (72) and a third motion rod (73) which are hingedly connected in sequence, and one end of the first motion rod (71) and the third motion rod (73) away from the second motion rod (72) are respectively hingedly connected to the armrest mounting plate (20).

8. The handrail floor stand according to claim 7, characterized in that: The linkage component (80) comprises: A first linkage member (81), a second linkage member (82) and a third linkage member (83), wherein one end of the first linkage member (81) is hinged to the middle part of the third moving rod (73), and the other end of the first linkage member (81) is hinged to one end of the first moving rod (61) close to the hinge point between the first moving rod and the third moving rod (63); one end of the second linkage member (82) is hinged to the middle part of the first moving rod (71), and the other end of the second linkage member (82) is hinged to one end of the first moving rod (61) close to the hinge point between the first moving rod and the second moving rod (62); one end of the third linkage member (83) is hinged to one end of the first moving rod (71) close to the hinge point between the first moving rod and the second moving rod (72), and the other end of the third linkage member (83) is hinged to the middle part of the first moving rod (61).

9. The handrail floor stand according to claim 5, characterized in that: When the backrest mounting member (11) is in a reclining position, a first angle A between the backrest mounting member (11) and the base frame (30) satisfies: 115°≤A≤138°, and a second angle B between the base frame (30) and a horizontal direction satisfies: 14°≤B≤30°; or, When the backrest mounting member (11) is in the reclining position, a preset distance L between the position of the highest point at which the footrest structure (50) is extended in the vertical direction and the highest point position of the hinge point between the backrest mounting member (11) and the first linkage rod (14) satisfies the following: 2.8 cm ≤ L ≤ 5 cm.

10. A zero-gravity armrest floor-standing sofa, characterized in that: A handrail floor bracket comprising the handrail floor bracket described in any one of claims 5 to 9.

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