Extending chair frame connecting structure

Abstract

The utility model provides an extension chair frame connecting structure, which relates to the technical field of furniture and comprises a chair frame body, the chair frame body comprises side plates positioned on the left side and the right side, and a main rod piece is connected between the side plates on the two sides; the front end of the side plate is rotationally connected with an extending foot stool, and the rear end of the side plate is rotationally connected with a backrest fixing plate; a pushing component is arranged on the main rod piece, one end of the connecting rod body is connected with one extension foot stool, and the other end of the connecting rod body is connected with the other extension foot stool; the extending foot stand comprises a first plate body, the upper end of the first plate body is rotationally connected with the side plate, the middle of the first plate body is connected with one end of a linkage rod, and the other end of the linkage rod is connected with the backrest fixing plate. The backrest mounting piece has the beneficial effects that the flat connecting surface is arranged on the backrest mounting piece, so that the connecting surface of the backrest mounting piece and the backrest is enlarged, the fixing effect of the backrest and the backrest mounting piece is enhanced, and the stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to an extended chair frame connection structure. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for seats. As people sit on office chairs most of the day, their comfort needs to be paid more attention. At present, most office chairs on the market can only improve the basic sitting function. When people take a lunch break, they cannot adjust their lunch break posture well, which is not conducive to people's modification during work breaks. Therefore, office chairs with adjustable backrests and footrests have gradually been introduced on the market so that people can achieve a semi-lying posture when resting. Therefore, many chair frame structures with extended functions have appeared.

[0003] Chinese patent announcement number CN220675590U discloses a skeleton structure of a reclining chair, wherein the structural setting for connecting with the backrest is "one end of the automatic footrest opening and closing frame is rotatably connected with a backrest connecting frame, and the backrest connecting frame is provided with a frame groove, which is conducive to the installation of the chair backrest, so that the chair backrest can be connected with the backrest connecting frame by plugging when it is installed, thus making the whole mechanism more stable". However, the defect of the above patent structure is that the connection area of ​​the backrest on the backrest connecting frame is only limited to the frame groove, which will have certain limitations, and the contact area of ​​the frame groove is small, which will lead to the phenomenon of unstable connection of the backrest.

[0004] Based on this, it is necessary to disclose a connection structure of an extended chair frame about a backrest to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides an extended chair frame connection structure, which can enhance the stability of the backrest connection.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] A connecting structure for an extended chair frame comprises a chair frame body, the chair frame body comprises side panels located on left and right sides, a main rod is connected between the side panels on both sides; the front end of the side panel is rotatably connected to an extended foot frame, and the rear end of the side panel is rotatably connected to a backrest fixing plate; a pushing member is arranged on the main rod, and also comprises a connecting rod body, one end of the connecting rod body is connected to one of the extended foot frames, and the other end of the connecting rod body is connected to the other extended foot frame; the extended foot frame comprises a first plate body, the upper end of the first plate body is rotatably connected to the side panel, the middle part of the first plate body is connected to one end of a linkage rod, and the other end of the linkage rod is connected to the backrest fixing plate; when the linkage rod moves, it will pull the backrest fixing plate to rotate the backrest fixing plate relative to the side panel; also comprises a backrest mounting member, the two ends of the backrest mounting member are respectively connected to the corresponding backrest fixing plates, and the backrest mounting member has a flat joint surface for fixing to the backrest.

[0008] Furthermore, the backrest mounting component includes an arch plate and an angle bracket, and both ends of the arch plate are respectively connected to the corresponding backrest fixing plates; the angle bracket includes a top plate, a middle plate and a bottom plate connected in sequence, and the flat joint surface is located on the upper surface of the bottom plate, and the opening formed by the top plate, the middle plate and the bottom plate faces the side opposite to the extended tripod; the angle bracket is hooked on the arch plate through the top plate, so that the angle bracket is in a suspended state, so that an insertion space is formed between the upper surface of the arch plate and the bottom plate.

[0009] Furthermore, the top plate is provided with a first connection hole, the bottom plate is provided with a second connection hole; and the arched plate is provided with an elliptical hole corresponding to the first connection hole.

[0010] Furthermore, the arched plate includes an arched plate convex in the middle and concave plates located on both sides of the arched plate, and the elliptical hole is located on the arched plate.

[0011] Furthermore, the extended tripod also includes a second plate body, one end of which is rotatably connected to the side plate, the other end of the second plate body is rotatably connected to the third plate body, and the connecting rod body is connected to the second plate body; it also includes a fourth plate body, the middle position of the fourth plate body is rotatably connected to the middle position of the second plate body, one end of the fourth plate body is rotatably connected to the first plate body, the other end of the fourth plate body is rotatably connected to the foot support plate, and the outer end of the third plate body is also rotatably connected to the foot support plate.

[0012] Furthermore, the pushing member is an electric push rod.

[0013] Furthermore, the cross section of the backrest mounting member is arc-shaped.

[0014] Furthermore, a backrest is included, and the backrest has a mounting portion for fixing to a flat joint surface.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By providing a flat joint surface on the backrest mounting member, the joint surface between the backrest mounting member and the backrest is increased, thereby enhancing the fixing effect of the backrest and the backrest mounting member and improving stability; in addition, the arched plate includes an arched plate protruding in the middle and concave plates on both sides of the arched plate, so that the whole has a certain arched design and high compressive strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 The three-dimensional structure of the extended chair frame connection structure described in the embodiment of the utility model Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the extended chair frame connection structure described in the embodiment of the utility model Figure 2 , at this time, the backrest is in a separated state;

[0020] Figure 3 is a schematic diagram of a backrest mounting member according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of another structure of the backrest mounting member of the extended chair frame connection structure described in an embodiment of the utility model.

[0022] In the figure: 1, side panel; 2, main rod; 3, extended foot frame; 301, first plate body; 302, second plate body; 303, third plate body; 304, fourth plate body; 305, foot support plate; 4, backrest fixing plate; 5, pushing member; 6, connecting rod body; 7, backrest mounting member; 701, bow plate; 7011, arch plate; 70111, elliptical hole; 7012, concave plate; 702, corner code; 7021, top plate; 70211, first connecting hole; 7022, middle plate; 7023, bottom plate; 70231, second connecting hole; 8, flat joint; 9, linkage rod; 10, backrest; 1001, mounting part; 11, side package plate, 1101, corner cutting. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] like Figures 1 to 3As shown, an extended chair frame connection structure includes a chair frame body, the chair frame body includes side panels 1 located on the left and right sides, and a main rod 2 is connected between the side panels 1 on both sides; the seat cushion is installed and fixed on the side panel 1, the front end of the side panel 1 is rotatably connected to the extended foot frame 3, and the rear end of the side panel 1 is rotatably connected to the backrest fixing plate 4; the extended foot frame 3 can be deformed, extended or retracted, and a pushing member 5 is arranged on the main rod 2, and also includes a connecting rod body 6, one end of the connecting rod body 6 is connected to one of the extended foot frames 3, and the other end of the connecting rod body 6 is connected to the other extended foot frame 3; the extended foot frame 3 includes a first plate body 301, the upper end of the first plate body 301 is rotatably connected to the side panel 1, the middle part of the first plate body 301 is connected to one end of a linkage rod 9, and the other end of the linkage rod 9 is connected to the backrest fixing plate 4; when the linkage rod 9 moves, it will pull the backrest fixing plate 4 to make the backrest fixing plate 4 rotate relative to the side panel 1.

[0025] The extended tripod 3 also includes a second plate body 302, one end of the second plate body 302 is rotatably connected to the side plate 1, the other end of the second plate body 302 is rotatably connected to the third plate body 303, and the connecting rod body 6 is connected to the second plate body 302; it also includes a fourth plate body 304, the middle position of the fourth plate body 304 is rotatably connected to the middle position of the second plate body 302, one end of the fourth plate body 304 is rotatably connected to the first plate body 301, the other end of the fourth plate body 304 is rotatably connected to the foot support plate 305, the outer end of the third plate body 303 is also rotatably connected to the foot support plate 305, and the foot support plate 305 is used to install the footrest.

[0026] In this embodiment, the pushing member 5 is an electric push rod, and the movable end of the pushing member 5 pushes or pulls back the connecting rod body 6, and the connecting rod body 6 drives the second plate body 302 to rotate. On the one hand, the second plate body 302 will pull the fourth plate body 304, thereby raising or lowering the footrest plate 305. On the other hand, the second plate body 302 will also pull the first plate body 301, and the first plate body 301 will pull the linkage rod 9 to move, thereby rotating the backrest fixing plate 4; it also includes a backrest mounting member 7, and the two ends of the backrest mounting member 7 are respectively connected to the corresponding backrest fixing plate 4, and the backrest mounting member 7 has a flat joint surface 8 for fixing to the backrest.

[0027] The backrest mounting member 7 includes an arch plate 701 and an angle code 702. The two ends of the arch plate 701 are respectively connected to the corresponding backrest fixing plate 4. Specifically, the arch plate 701 includes an arch plate 7011 convex in the middle, and concave plates 7012 located on both sides of the arch plate 7011. The arch plate 7011 and the concave plates 7012 on both sides make the arch plate 701 have a certain arch design and high compressive strength; the angle code 702 includes a top plate 7021, a middle plate 7022, and a bottom plate 7023 connected in sequence. The plate 7022 and the bottom plate 7023, the flat joint 8 is located on the upper surface of the bottom plate 7023, and the opening surrounded by the top plate 7021, the middle plate 7022 and the bottom plate 7023 faces the side opposite to the extended leg frame 3; the angle code 702 is hooked on the arch plate 701 through the top plate 7021, so that the angle code 702 is in a suspended state, so that an insertion space is formed between the arch plate 701 and the upper surface of the bottom plate 7023; the insertion space is for the backrest 10 to be inserted and installed.

[0028] The top plate 7021 is provided with a first connection hole 70211, and the bottom plate 7023 is provided with a second connection hole 70231; the arch plate 701 is provided with an elliptical hole 70111 corresponding to the first connection hole 70211; the elliptical hole 70111 is located on the arch plate 7011. The angle code 702 is fixed to the arch plate 701 by making the first connection hole 70211 correspond to the elliptical hole 70111, and then tightening the mounting bolts through the holes to fix the angle code 702 to the arch plate 701; the elliptical hole 70111 is to facilitate the angle code 702 to properly adjust the front and rear positions. The second connecting hole 70231 is a threaded hole, and the backrest 10 has a mounting portion 1001 for fixing to the flat joint surface 8. The mounting portion 1001 is inserted into the insertion space between the arch plate 701 and the upper surface of the base plate 7023, and then a bolt is screwed into the second connecting hole 70231 from bottom to top to tighten the mounting portion 1001, so that the backrest 10 can be fixed to the chair frame body.

[0029] In the present structure, the width of the angle code 702 is not limited, as long as it does not exceed the installation width on the arch plate 7011, that is, the width of the flat surface 8 can be increased according to actual conditions, and the installation width of the mounting portion 1001 can also be set according to actual conditions; therefore, a sufficiently wide size can be set so that the contact area between the flat surface 8 and the mounting portion 1001 is large enough, so that the mounting portion 1001 can be stably fixed in the angle code 702, thereby enhancing the stability of the installation of the backrest 10.

[0030] In actual application, depending on the different models of the backrest, the angle code 702 may not be used, and the backrest may be directly locked in the elliptical hole 70111 on the arch plate 701 to achieve the purpose of fixation.

[0031] The chair frame body also has a side panel 11, and the side panel 11 has a cut corner 1101. When the extended leg frame 3 is retracted, the foot support plate 305 is close to the cut corner 1101. By forming the cut corner 1101 here, the foot support plate 305 can be closer when retracted, and the compactness is better.

[0032] like Figure 4 As shown, it is another embodiment of the backrest mounting member 7. In this embodiment, the cross section of the backrest mounting member 7 is in an arch shape, with high support strength, and the flat joint surface 8 is located on the side of the backrest mounting member 7 that is inclined outward; correspondingly, the mounting portion 1001 of the backrest 10 is also set to be inclined to match and connect with the flat joint surface 8; the flat joint surface 8 is provided with a mounting hole, and the mounting portion 1001 is also penetrated with a connecting hole, and bolts are used to install on the mounting hole and the connecting hole, so as to fix the backrest 10 on the backrest mounting member 7. In this embodiment, the contact area between the flat joint surface 8 and the mounting portion 1001 of the backrest 10 is also large enough to enhance the fixing effect of the backrest 10.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An extension chair frame connection structure, characterized in that: The chair frame comprises a chair frame body, the chair frame body comprises side panels (1) located on the left and right sides, and a main rod (2) is connected between the side panels (1) on both sides; the front end of the side panel (1) is rotatably connected to an extension leg frame (3), and the rear end of the side panel (1) is rotatably connected to a backrest fixing plate (4); a pushing member (5) is arranged on the main rod (2), and also comprises a connecting rod body (6), one end of the connecting rod body (6) is connected to one of the extension leg frames (3), and the other end of the connecting rod body (6) is connected to the other extension leg frame (3); the extension leg frame (3) comprises a first plate body (301), the upper end of the first plate body (301) is rotatably connected to the side panel (1), the middle part of the first plate body (301) is connected to one end of a linkage rod (9), and the other end of the linkage rod (9) is connected to the backrest fixing plate (4); when the linkage rod (9) moves, it pulls the backrest fixing plate (4), so that the backrest fixing plate (4) rotates relative to the side panel (1); It also includes a backrest mounting member (7), both ends of which are respectively connected to corresponding backrest fixing plates (4), and the backrest mounting member (7) has a flat joint surface (8) for fixing to the backrest.

2. The extension chair frame connection structure according to claim 1, characterized in that: The backrest mounting member (7) comprises an arch plate (701) and an angle bracket (702), wherein the two ends of the arch plate (701) are respectively connected to the corresponding backrest fixing plates (4); the angle bracket (702) comprises a top plate (7021), an intermediate plate (7022) and a bottom plate (7023) which are connected in sequence, the flat joint surface (8) is located on the upper surface of the bottom plate (7023), and the opening formed by the top plate (7021), the intermediate plate (7022) and the bottom plate (7023) faces the side opposite to the extended leg frame (3); the angle bracket (702) is hooked on the arch plate (701) through the top plate (7021), so that the angle bracket (702) is in a suspended state, so that an insertion space is formed between the upper surfaces of the arch plate (701) and the bottom plate (7023).

3. The extension chair frame connection structure according to claim 2, characterized in that: The top plate (7021) is provided with a first connection hole (70211), and the bottom plate (7023) is provided with a second connection hole (70231); and the arch plate (701) is provided with an elliptical hole (70111) corresponding to the first connection hole (70211).

4. The extension chair frame connection structure according to claim 3, characterized in that: The arched plate (701) includes an arched plate (7011) protruding in the middle, and concave plates (7012) located on both sides of the arched plate (7011), and the elliptical hole (70111) is located on the arched plate (7011).

5. The extension chair frame connection structure according to claim 1, characterized in that: The extended tripod (3) also includes a second plate body (302), one end of which is rotatably connected to the side plate (1), the other end of which is rotatably connected to the third plate body (303), and the connecting rod body (6) is connected to the second plate body (302); it also includes a fourth plate body (304), the middle position of the fourth plate body (304) is rotatably connected to the middle position of the second plate body (302), one end of the fourth plate body (304) is rotatably connected to the first plate body (301), the other end of the fourth plate body (304) is rotatably connected to the foot support plate (305), and the outer end of the third plate body (303) is also rotatably connected to the foot support plate (305).

6. The extension chair frame connection structure according to claim 1, characterized in that: The pushing member (5) is an electric push rod.

7. The extension chair frame connection structure according to claim 1, characterized in that: The cross section of the backrest mounting member (7) is in the shape of an arc.

8. The extension chair frame connection structure according to any one of claims 1 to 7, characterized in that: The backrest (10) comprises a backrest (10), wherein the backrest (10) has a mounting portion (1001) for fixing to a flat joint surface (8).

Images