An iron frame for an electric sofa

Abstract

The present invention discloses an iron frame for an electric sofa, comprising: a lifting frame; a seat frame support member that moves back and forth relative to the lifting frame; two sets of link mechanisms for connecting the seat frame support member to the lifting frame; both sets of link mechanisms include a link mechanism main body, a first link, a second link, a sixth link and other links; one end of the first link is rotatably connected to the seat frame support member, and the other end of the first link is rotatably connected to one end of the sixth link; one end of the second link is rotatably connected to the middle of the first link, the middle of the second link is rotatably connected to the link mechanism main body, the upper part of the other end of the second link is rotatably connected to one end of the link mechanism main body, and the lower part of the other end of the second link is rotatably connected to other links; the other end of the sixth link is rotatably connected to the link mechanism main body and at the same time is rotatably connected to the footrest bracket.

Description

Technical Field

[0001] The invention belongs to the technical field of furniture manufacturing, and in particular relates to an electric sofa iron frame. Background Art

[0002] An electric reclining sofa is an electric sofa that can automatically recline. The surface is generally covered with leather and the middle is filled with sponge. The main structure is supported by a retractable reclining iron frame. It is fashionable and beautiful, and is widely used in homes, companies and other places.

[0003] The traditional electric sofa frame includes a seat frame support frame, a footrest support frame, a backrest support frame, a lifting frame and a set of connecting rod mechanisms. The seat frame support frame is installed on the lifting frame through the connecting rod mechanism, and the footrest support frame and the backrest support are also connected to the connecting rod mechanism respectively. The forward tilt or backward extension of the backrest is adjusted by the different positions of the seat frame support frame, and the extension and contraction of the footrest are adjusted. The traditional electric sofa iron frame can be divided into the auxiliary standing posture, initial posture, TV posture and leisure posture according to the different positions of the seat frame support frame, footrest and backrest. The various posture adjustments of the entire electric sofa iron frame are driven by a linear motor to drive the seat frame support frame forward and backward, and at the same time cooperate with the connecting rod mechanism to drive the footrest support and the backrest support to move.

[0004] The existing electric sofa bracket has the following problems:

[0005] (1) The footrest bracket in the existing electric sofa iron frame has problems such as weak left and right rigidity and poor fit of the footrest board;

[0006] (2) When the existing electric sofa iron frame is in the TV posture and leisure posture, the left and right rigidity of the iron frame is seriously insufficient, and there is a problem of large left and right shaking;

[0007] (3) The connecting pipe of the driving connecting rod of the existing electric sofa iron frame is not rigid enough and breaks frequently, which greatly shortens the service life of the electric sofa iron frame and poses a safety hazard;

[0008] (4) The rear connecting rod and other connecting rods in the existing electric sofa iron frame are relatively long, making the left and right torsion resistance poor;

[0009] (5) The existing electric sofa iron frame is generally connected by a single connecting rod, the overall rigidity of the iron frame is poor, and it shakes violently from side to side;

[0010] (6) The existing electric sofa iron frame basically adopts the waist groove structure design, but the waist groove structure design has the disadvantages of poor connecting rod transmission stability, frequent jamming, and strong power frustration. Summary of the invention

[0011] Purpose of the invention: In order to overcome the above-mentioned deficiencies of the existing electric sofa bracket, the present invention proposes an electric sofa iron frame.

[0012] Technical solution: An iron frame of an electric sofa, comprising: a lifting frame; a seat frame support member that moves back and forth relative to the lifting frame; two sets of link mechanisms for connecting the seat frame support member to the lifting frame; each of the two sets of link mechanisms includes a link mechanism main body, a first link, a second link, a sixth link, and other links; one end of the first link is rotatably connected to the seat frame support member, and the other end of the first link is rotatably connected to one end of the sixth link; one end of the second link is rotatably connected to the middle of the first link, the middle of the second link is rotatably connected to the link mechanism main body, the upper part of the other end of the second link is rotatably connected to one end of the link mechanism main body, and the lower part of the other end of the second link is rotatably connected to other links; the other end of the sixth link is rotatably connected to the link mechanism main body and at the same time rotatably connected to the footrest support.

[0013] Further, the other links include: a third link, a fourth link, a fifth link, a seventh link, and an eighth link;

[0014] The lower part of the other end of the second link is rotatably connected to one end of the third link; the other end of the third link is rotatably connected to the lower part of one end of the fourth link, the upper part of one end of the fourth link is rotatably connected to the link mechanism main body, and the other end of the fourth link is rotatably connected to the middle of the fifth link; one end of the fifth link is rotatably connected to the link mechanism main body, and the other end of the fifth link is rotatably connected to the middle of the eighth link; the other end of the sixth link is rotatably connected to the middle of the seventh link; one end of the seventh link is rotatably connected to one end of the eighth link, and the other end of the eighth link is rotatably connected to the link mechanism main body.

[0015] Further, a limit pin is provided on the link mechanism main body, and the limit pin is used to limit the first link.

[0016] Further, the link mechanism main body includes a first main board and a second main board, and a plurality of bending parts are provided on both the first main board and the second main board. One end of the second main board is fixed to one end of the first main board, and the other end of the second main board is fixed to the other end of the first main board. By using the bending parts on the first main board and the second main board, a plurality of frame-shaped spaces are formed between the first main board and the second main board.

[0017] Further, it further includes a footrest support. The footrest support is rotatably connected to the seat frame support member, and the footrest support is rotatably connected to the other end of the seventh link. An anti-torsion link is provided between the two sets of footrest supports.

[0018] Further, a connecting pipe is provided between the two sets of link mechanisms. The connecting pipe is used to drive the two sets of link mechanisms under the drive of a driving mechanism, and a reinforcing angle steel is provided on the connecting pipe.

[0019] Furthermore, an I-beam is provided in the lifting frame.

[0020] Furthermore, it also includes a backrest bracket, one side of the lower end of the backrest bracket is rotatably connected to the seat frame support member, and the other side of the lower end of the backrest bracket is rotatably connected to the connecting rod mechanism body.

[0021] Furthermore, the other connecting rods include a ninth connecting rod, a tenth connecting rod and an eleventh connecting rod, one end of the ninth connecting rod is rotatably connected to the inner side of the seat frame support, the other end of the ninth connecting rod is rotatably connected to one end of the tenth connecting rod, and the other end of the tenth connecting rod is fixedly connected to the connecting tube; one end of the eleventh connecting rod is rotatably connected to the connecting rod mechanism body, and the other end of the eleventh connecting rod is fixedly connected to the connecting tube.

[0022] Furthermore, the connecting tube is a square tube, and a right-angle opening is provided on the other end of the eleventh connecting rod, and the right-angle opening is adapted to the connecting tube; a limit pin is provided at a corresponding position of the connecting rod mechanism body, and the limit pin is used to limit the rotation angle of the eleventh connecting rod.

[0023] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0024] (1) Different from the existing driving mechanism for the footrest on the sofa iron frame, the present invention drives the sixth connecting rod through the first connecting rod and the second connecting rod to extend the footrest, and no jamming occurs during the extension and retraction of the footrest, thereby greatly improving the user experience;

[0025] (2) The present invention greatly enhances the rigidity of the entire iron frame through the main body of the connecting rod mechanism structure, reducing the shaking in the TV posture and leisure posture;

[0026] (3) The present invention increases the rigidity of the connecting pipe of the driving connecting rod by adding a reinforcing angle steel to the connecting pipe, thereby greatly reducing the probability of the connecting pipe breaking;

[0027] (4) The present invention greatly enhances the left and right rigidity of the footrest bracket through the torsion-resistant connecting rod, and optimizes the recovery fit of the footrest board;

[0028] (5) The present invention adopts a segmented structure to connect the connecting pipe with the connecting rod mechanism, that is, the ninth connecting rod, the tenth connecting rod and the eleventh connecting rod are connected to the connecting pipe; the segmented structure has the advantages of simple assembly and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of an electric sofa iron frame;

[0031] Figure 2 It is a side view of an electric sofa iron frame;

[0032] Figure 3 It is a schematic diagram of the inner plane structure of a set of seat frame supports, a set of link mechanisms, a set of backrest brackets, and a set of ottoman brackets;

[0033] Figure 4 It is a schematic diagram of the inner three-dimensional structure of a set of seat frame supports, a set of link mechanisms, a set of backrest brackets, and a set of ottoman brackets. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the following further details the present invention in combination with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "first", "second", "third", "fourth", "fifth", and "sixth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth", "fifth", and "sixth" may explicitly or implicitly include one or more of such features.

[0036] In addition, in the present invention, unless otherwise clearly defined and limited, terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, the up, down, left, and right are descriptions of the specific orientations in actual use according to the drawings of the specification.

[0038] Embodiment 1:

[0039] like Figure 1 As shown, this embodiment discloses an electric sofa iron frame, comprising:

[0040] Lifting frame 1; the lifting frame is driven by a linear motor to perform lifting motion;

[0041] Two sets of seat frame support members 2 are movable forward and backward relative to the lifting frame; specifically, the linear motor drives the seat frame support members 2 to move forward and backward on the lifting frame 1 through the connecting rod mechanism 3;

[0042] Two sets of connecting rod mechanisms 3 are used to connect the seat frame support 2 to the lifting frame 1; the two sets of connecting rod mechanisms 3 include a connecting rod mechanism body 30, a first connecting rod 31, a second connecting rod 32, a sixth connecting rod 36 and other connecting rods; specifically, one end of the first connecting rod 31 is rotatably connected to the seat frame support 2, and the other end of the first connecting rod 31 is rotatably connected to one end of the sixth connecting rod 36; one end of the second connecting rod 32 is rotatably connected to the middle part of the first connecting rod 31, and the middle part of the second connecting rod 32 is rotatably connected to the connecting rod mechanism body 30, and the upper part of the other end of the second connecting rod 32 is rotatably connected to one end of the connecting rod mechanism body 30, and a corresponding positioning pin is arranged on the connecting rod mechanism body 30 for limiting the rotation angle of the second connecting rod 32, and the lower part of the other end of the second connecting rod 32 is rotatably connected to other connecting rods; the other end of the sixth connecting rod is rotatably connected to the connecting rod mechanism body and the foot support bracket at the same time.

[0043] Compared with the traditional connecting rod mechanism, the connecting rods in the connecting rod mechanism of this embodiment have stable transmission, avoiding the jamming phenomenon when the posture is changed, and improving the user experience. Specifically, unlike the existing driving of the footrest on the sofa iron frame, the present invention drives the sixth connecting rod through the first connecting rod and the second connecting rod to extend the footrest, and there will be no jamming phenomenon during the extension and retraction of the footrest, which greatly improves the user experience.

[0044] The auxiliary standing posture of the electric sofa iron frame of this embodiment is: the lifting frame is lifted and the seat frame support is kept tilted forward; the initial posture of the electric sofa iron frame of this embodiment is: the lifting frame is lowered and is in the original position, and the seat frame support frame is normally placed on the lifting frame.

[0045] Embodiment 2:

[0046] like Figures 1 to 4 As shown, this embodiment discloses an electric sofa iron frame, comprising:

[0047] Lifting frame 1; the lifting frame 1 is driven by a linear motor to perform lifting motion; in order to improve the rigidity of the lifting frame 1 and reduce the left and right shaking amplitude of the lifting frame, an I-beam 11 is added to the lifting frame of this embodiment.

[0048] The seat frame support member 2 moves back and forth relative to the lifting frame 1. Specifically, the linear motor drives the seat frame support member 2 through the link mechanism 3 to move back and forth on the lifting frame 1.

[0049] Two sets of link mechanisms 3 are used to connect the seat frame support member 2 to the lifting frame 1.

[0050] Two sets of backrest brackets 4, and each set of backrest brackets 4 is rotatably connected to a link mechanism 3 and the seat frame support member 2.

[0051] Two sets of footrest brackets 5, and each set of footrest brackets 4 is rotatably connected to a link mechanism 3 and the seat frame support member 2.

[0052] Specifically, the seat frame support member 2 of this embodiment includes a seat frame fixing member 21 and a seat frame link 22. A plurality of seat frame fixing members 21 are arranged on the seat frame link 22 for installing the seat frame. And in some embodiments, by lengthening the waist slot holes on the seat frame fixing member 21, it is convenient to fix the seat frame to the seat frame support member 2. If the waist slot holes are set too small, the seat frame is likely to become loose.

[0053] Specifically, the link mechanism 3 of this embodiment includes a link mechanism main body 30, a first link 31, a second link 32, a third link 33, a fourth link 34, a fifth link 35, a sixth link 36, a seventh link 37, and an eighth link 38. Among them, in order to enhance the overall rigidity of the iron frame and reduce the shaking in the TV position and the leisure position, the link mechanism main body 30 of this embodiment adopts a frame structure. Specifically, the link mechanism main body 30 includes a first main board 301 and a second main board 302. A plurality of bending parts are provided on both the first main board 301 and the second main board 302. One end of the second main board 302 is fixed to one end of the first main board 301, and the other end of the second main board 302 is fixed to the other end of the first main board 301. By using the bending parts on the first main board 301 and the second main board 302, a plurality of frame spaces are formed between the first main board 301 and the second main board 302, so as to improve the overall rigidity of the iron frame. In order to improve work efficiency, self-tapping screws are used in this embodiment to fix the first main board 301 and the second main board 302. Connecting by self-tapping screws can effectively improve work efficiency and is convenient for assembly.

[0054] Among them, in order to ensure the stable transmission of each connecting rod and avoid jamming during attitude conversion, the connection relationship of each connecting rod in this embodiment will be further described. One end of the first connecting rod 31 of this embodiment is rotatably connected to the seat frame support 2, and a limit pin is provided at the corresponding position of the seat frame support 2 to limit the rotation angle of the first connecting rod 31; the other end of the first connecting rod 31 is rotatably connected to one end of the sixth connecting rod 36; one end of the second connecting rod 32 is rotatably connected to the middle of the first connecting rod 31, the middle of the second connecting rod 32 is rotatably connected to the connecting rod mechanism main body 30, and the upper part of the other end of the second connecting rod 32 is rotatably connected to one end of the connecting rod mechanism main body 30. Assuming that the first main board 301 faces the outside of the iron frame, the middle of the second connecting rod 32 is rotatably connected to the first main board 301, and the upper part of the other end of the second connecting rod 32 is rotatably connected to one end of the first main board 301; a positioning pin is correspondingly provided on the first main board 301 to limit the rotation angle of the second connecting rod 32, and the lower part of the other end of the second connecting rod 32 is rotatably connected to one end of the third connecting rod 33; the other end of the third connecting rod 33 is rotatably connected to the lower part of one end of the fourth connecting rod 34, the upper part of one end of the fourth connecting rod 34 is rotatably connected to the connecting rod mechanism main body 30, and the other end of the fourth connecting rod 34 is rotatably connected to the middle of the fifth connecting rod 35; one end of the fifth connecting rod 35 is rotatably connected to the connecting rod mechanism main body 30. Specifically, a waist slot hole is provided at one end of the fifth connecting rod 35. Using a rivet and the waist slot hole, one end of the fifth connecting rod 35 is rotatably connected to the first main board 301; the other end of the fifth connecting rod 35 is rotatably connected to the middle of the eighth connecting rod 38; the other end of the sixth connecting rod 36 is rotatably connected to the middle of the seventh connecting rod 37; one end of the seventh connecting rod 37 is rotatably connected to one end of the eighth connecting rod 38, and the other end of the eighth connecting rod 38 is rotatably connected to the connecting rod mechanism main body 30. Each of the connecting rods rotatably connected to the seat frame support 2 is rotatably connected to the outside of the seat frame support 2. The risk of using a rivet design for the connection rotation core drive is relatively high. Therefore, in some embodiments, a shaft screw structure is used for the rotational connection. By appropriately increasing the diameter of the shaft screw, the torsional resistance and assembly efficiency of the connecting rod can be effectively improved.

[0055] The connecting rod mechanism of this embodiment further includes a ninth connecting rod 39 and a tenth connecting rod 310. One end of the ninth connecting rod 39 is rotatably connected to the inner side of the seat frame support 2, the other end of the ninth connecting rod 39 is rotatably connected to one end of the tenth connecting rod 310, the other end of the tenth connecting rod 310 is fixedly connected to the connecting pipe 6, and both ends of the connecting pipe 6 are respectively connected to the tenth connecting rods 310 of two sets of connecting rod mechanisms 3. When the linear motor drives the connecting pipe 6, due to the insufficient rigidity of the connecting pipe 6, there are often fracture phenomena. Therefore, in this embodiment, a reinforcing angle steel 61 is added to the connecting pipe 6 to improve the rigidity of the connecting pipe 6 and prevent the connecting pipe from breaking.

[0056] To ensure the connection strength between the link mechanism and the connecting pipe 6, the link mechanism of this embodiment further includes an eleventh link 311. One end of the eleventh link 311 is rotatably connected to the main body 30 of the link mechanism, and the other end of the eleventh link 311 is fixedly connected to the connecting pipe 6. That is to say, the other ends of both the eleventh link 311 and the tenth link 310 are connected to the connecting pipe 6. And a limit pin is provided at the corresponding position of the main body 30 of the link mechanism to limit the rotation angle of the eleventh link 311. The connecting pipe 6 of this embodiment is a square pipe, and a right-angle opening is provided at the other end of the eleventh link, and the right-angle opening is adapted to the connecting pipe.

[0057] In this embodiment, a spring 7 is also used to connect the main body 30 of the link mechanism and the seat frame link 22. Specifically, one end of the spring 7 is connected to the seat frame link 22, and the other end of the spring 7 is connected to the main body 30 of the link mechanism.

[0058] The backrest bracket 4 of this embodiment is connected to the seat frame link 22 at a certain angle. Specifically, the backrest bracket 4 includes a backrest main bracket 41 and a backrest link 42. One side of the lower end of the backrest main bracket 41 is rotatably connected to the seat frame link 22, the other side of the lower end of the backrest main bracket 41 is rotatably connected to one end of the backrest link 42, and the other end of the backrest link 42 is rotatably connected to the main body 30 of the link mechanism.

[0059] The footrest bracket 5 of this embodiment includes a footrest 50, a first footrest link 51, a second footrest link 52, a third footrest link 53, and a fourth footrest link 54. One end of the first footrest link 51 is rotatably connected to one end of the footrest 50, the other end of the first footrest link 51 is rotatably connected to one end of the second footrest link 52, the other end of the second footrest link 52 is rotatably connected to the seat frame link 22, one end of the third footrest link 53 is rotatably connected to the other end of the footrest 50, the other end of the third footrest link 53 is rotatably connected to one end of the fourth footrest link 54, and the other end of the fourth footrest link 54 is rotatably connected to the seat frame link 22. Specifically, the connection between the second footrest link 52 and the seat frame link 22 is located below the connection between the fourth footrest link 54 and the seat frame link 22. The middle section of the fourth footrest link 54 is rotatably connected to a certain position on the first footrest link 51. Since the rigidity strength of the footrest bracket is very weak and the fitting degree of the footrest during retraction is poor, to solve this problem, this embodiment adds a torsion-resistant link 55, and both ends of the torsion-resistant link 55 are respectively connected to the second footrest links 52 of two sets of footrest brackets 5.

Claims

1. An iron frame of an electric sofa, characterized in that: Comprising: Lifting frame; Seat frame support member that moves back and forth relative to the lifting frame; Two sets of link mechanisms for connecting the seat frame support member to the lifting frame; Both of the two sets of link mechanisms include a link mechanism main body, a first link, a second link, a sixth link, and other links; one end of the first link is rotatably connected to the seat frame support member, and the other end of the first link is rotatably connected to one end of the sixth link; one end of the second link is rotatably connected to the middle of the first link, the middle of the second link is rotatably connected to the link mechanism main body, the upper part of the other end of the second link is rotatably connected to one end of the link mechanism main body, and the lower part of the other end of the second link is rotatably connected to other links; the other end of the sixth link is rotatably connected to the link mechanism main body and at the same time is rotatably connected to the footrest support; The other links include: a third link, a fourth link, a fifth link, a seventh link, and an eighth link; The lower part of the other end of the second link is rotatably connected to one end of the third link; the other end of the third link is rotatably connected to the lower part of one end of the fourth link, the upper part of one end of the fourth link is rotatably connected to the link mechanism main body, and the other end of the fourth link is rotatably connected to the middle of the fifth link; one end of the fifth link is rotatably connected to the link mechanism main body, and the other end of the fifth link is rotatably connected to the middle of the eighth link; the other end of the sixth link is rotatably connected to the middle of the seventh link; one end of the seventh link is rotatably connected to one end of the eighth link, and the other end of the eighth link is rotatably connected to the link mechanism main body; The link mechanism main body includes a first main board and a second main board, and a plurality of bending parts are provided on both the first main board and the second main board. One end of the second main board is fixed to one end of the first main board, and the other end of the second main board is fixed to the other end of the first main board. By using the bending parts on the first main board and the second main board, a plurality of frame-shaped spaces are formed between the first main board and the second main board.

2. The iron frame of an electric sofa according to claim 1, characterized in that: A limit pin is provided on the link mechanism main body, and the limit pin is used to limit the first link.

3. The iron frame of an electric sofa according to claim 2, characterized in that: It further includes a footrest support. The footrest support is rotatably connected to the seat frame support member, and the footrest support is rotatably connected to the other end of the seventh link. An anti-torsion link is provided between the two sets of footrest supports.

4. The iron frame of an electric sofa according to claim 1, characterized in that: A connecting pipe is provided between the two sets of link mechanisms. The connecting pipe is used to drive the two sets of link mechanisms under the drive of a drive mechanism, and a reinforcing angle steel is provided on the connecting pipe.

5. The iron frame of an electric sofa according to claim 1, characterized in that: An I-beam is provided inside the lifting frame.

6. The iron frame of an electric sofa according to claim 1, characterized in that: It further includes a backrest support. One side of the lower end of the backrest support is rotatably connected to the seat frame support member, and the other side of the lower end of the backrest support is rotatably connected to the link mechanism main body.

7. An iron frame of an electric sofa according to claim 4, characterized in that: The other links further include a ninth link, a tenth link, and an eleventh link. One end of the ninth link is rotatably connected to the inner side of the seat frame support member, the other end of the ninth link is rotatably connected to one end of the tenth link, and the other end of the tenth link is fixedly connected to the connecting pipe; one end of the eleventh link is rotatably connected to the link mechanism main body, and the other end of the eleventh link is fixedly connected to the connecting pipe.

8. The iron frame of an electric sofa according to claim 7, characterized in that: The connecting pipe is a square pipe. A right-angle opening is provided at the other end of the eleventh connecting rod, and the right-angle opening is adapted to the connecting pipe. A limit pin is provided at the corresponding position of the connecting rod mechanism body, and the limit pin is used to limit the rotation angle of the eleventh connecting rod.

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