Chair backrest and armrest connecting structure

Abstract

The utility model discloses a chair backrest and armrest connecting structure which comprises a backrest and an armrest, the backrest comprises a backrest framework and a backrest covering body, the armrest comprises an armrest framework and an armrest covering body, the armrest framework is connected with a cushion framework, a rear vertical pipe is arranged on the rear portion of the armrest framework, and at least one height adjusting screw hole is formed in the upper portion of the rear vertical pipe. The lower portions of the two sides of the backrest framework are provided with matching pipes matched with the rear vertical pipes, the matching pipes are provided with fixing holes matched with screw holes formed in the rear vertical pipes, and the rear vertical pipes and the matching pipes are inserted in a sleeved mode and are fixedly connected in the mode that fastening screws are matched with the fixing holes and the screw holes. Disassembly and connection can be facilitated, the packaging size is reduced, and the loading capacity of the packaging box is improved. The height adjusting screw hole is formed, so that the relative height of the rear vertical pipe and the matching pipe is adjusted, and the requirements of users with different heights on different heights and riding comfort of the backrest are met.

Description

Technical Field

[0001] The utility model relates to the technical field of chairs, and particularly to a connecting structure between a chair backrest and an armrest. Background Art

[0002] A common lift swivel chair on the market is composed of a lift foot, a seat cushion, a backrest and armrests. The seat cushion, the backrest and the armrests adopt a skeleton structure inside and are covered with soft materials outside. The backrest skeleton is fixedly connected to the seat cushion skeleton, and the armrest skeleton is fixedly connected to the seat cushion skeleton. The disadvantage of this chair with a fixed connection structure is that since the backrest skeleton is fixedly connected to the seat cushion skeleton, a box with a relatively large volume is required to package a single chair, which occupies a relatively large amount of transportation space. For users of different heights, backrests of different heights are required to meet the comfort requirements, but the existing swivel chairs cannot solve the problem of adjustable backrest height. Summary of the Invention

[0003] Aiming at the above problems and deficiencies, the purpose of the utility model is to provide a connecting structure between a chair backrest and an armrest that can be conveniently disassembled and assembled, reduce the packaging volume, and increase the loading capacity of the packaging box. On this basis, a further purpose of the utility model is to provide a connecting structure between a chair backrest and an armrest with an adjustable backrest height.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a connecting structure between a chair backrest and an armrest, including a backrest and armrests. The backrest includes a backrest skeleton and a backrest covering body, and the armrests include an armrest skeleton and an armrest covering body. The armrest skeleton is connected to the seat cushion skeleton. At least one height adjustment screw hole is provided at the upper part of a rear riser on the rear part of the armrest skeleton. At the lower parts on both sides of the backrest skeleton, there are fitting pipes adapted to the rear riser. Fixing holes adapted to the screw holes provided on the rear riser are provided on the fitting pipes. The rear riser and the fitting pipes are sleeved and fixedly connected through fastening screws in cooperation with the fixing holes and the screw holes.

[0005] Further, the rear riser is a sleeve pipe, and the fitting pipe is an insertion pipe adapted to the inner cavity of the rear riser.

[0006] Further, the rear riser is an insertion pipe, and the fitting pipe is a sleeve pipe adapted to the outer diameter of the rear riser.

[0007] Further, the armrest skeleton includes a front vertical rod, a rear riser, an upper steel rod connecting the front vertical rod and the rear riser, and a side stop rod connecting the upper steel rod and the seat cushion skeleton.

[0008] Further, the backrest skeleton includes a first back skeleton, and the first back skeleton includes a first left side rod, a first right side rod, a first upper cross rod, a first lower cross rod that enclose a frame, and a neutral rod connecting the first upper cross rod and the first lower cross rod. The first lower cross rod is higher than the rear riser.

[0009] Further, the backrest frame includes a second back frame and a waist-hip frame. The second back frame includes a second left rod, a second right rod, an upper arc rod, a lower arc rod, a second neutral rod connecting the upper arc rod and the lower arc rod, and a middle cross rod connecting the second left rod and the second right rod. The lower arc rod is higher than the rear riser pipe.

[0010] The waist-hip frame includes a lower waist-hip arc rod, a left waist-hip rod and a right waist-hip rod respectively connecting the upper parts of both ends of the lower waist-hip arc rod. The upper part of the left waist-hip rod is connected to the left side of the lower arc rod, and the upper part of the right waist-hip rod is connected to the right side of the lower arc rod. The lower end of the second neutral rod extends and is welded to the lower arc rod. A first connecting ear for fixing the seat cushion covering is provided inside the lower waist-hip arc rod.

[0011] Further, in order to meet the different requirements of users of different heights for the height of the backrest, 1 to 4 height adjustment screw holes are provided.

[0012] Further, the first left rod, the first right rod and the first upper cross rod are integrally bent and made of steel pipes; the first lower cross rod and the neutral rod are made of flat steel bars. The left and right ends of the first lower cross rod are respectively connected to the first left rod and the first right rod by welding, and the upper and lower ends of the neutral rod are respectively connected to the first upper cross rod and the first upper cross rod by welding.

[0013] Further, the second left rod, the second right rod and the upper arc rod are integrally bent and made of steel pipes; the second neutral rod, the left waist-hip rod, the right waist-hip rod and the lower waist-hip arc rod are made of steel pipes; the lower arc rod is made of flat steel bars. There are two second neutral rods, middle cross rods and third neutral rods, and the middle cross rod is made of iron wire.

[0014] Further, the front riser pipe and the upper steel rod are made of pipe fittings or solid steel bars; the seat cushion frame is made of pipe fittings or solid steel bars; the side baffle rod is made of flat steel bars.

[0015] The beneficial technical effects of the present invention: The backrest frame and the armrest frame of the chair are inserted with the rear riser pipe and the matching pipe sleeve and fixedly connected through fastening screws and the cooperation of the fixing holes and the screw holes, which can facilitate disassembly and connection, reduce the packaging volume, and increase the loading capacity of the packing box. On this basis, the further technical effect is to set 1 to 4 height adjustment screw holes to adjust the relative height of the rear riser pipe and the matching pipe, so as to meet the requirements of users of different heights for different backrest heights and riding comfort, and is suitable for more users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the connection of the backrest frame and the armrest frame in the first embodiment of the present invention;

[0017] Figure 2 is Figure 1 the schematic diagram of the decomposition structure;

[0018] Figure 3 is Figure 1 the schematic diagram of the decomposition structure of the backrest and armrest in the embodiment;

[0019] Figure 4 is the schematic diagram of the structure of the chair in the first embodiment;

[0020] Figure 5 is the schematic diagram of the connection structure of the backrest frame and the armrest frame in the second embodiment of the present utility model;

[0021] Figure 6 is the schematic diagram of the structure when the first embodiment of the present utility model is used on a swivel chair. Specific implementation manners

[0022] Embodiment 1: As shown in Figures 1-4 , 6, the present utility model relates to a connection structure between a chair backrest and an armrest, which includes a backrest and an armrest. The backrest includes a backrest frame and a backrest covering body, and the armrest includes an armrest frame and an armrest covering body. The armrest frame is connected to the seat cushion frame. At least one height adjustment screw hole 11 is provided on the upper part of the rear riser 1 of the armrest frame. At the lower parts on both sides of the backrest frame, there are fitting pipes 2 adapted to the rear riser 1. Fixing holes 21 adapted to the screw holes 11 provided on the rear riser 1 are provided on the fitting pipes 2. The rear riser 1 and the fitting pipe 2 are sleeved and fixedly connected by fastening screws in cooperation with the fixing holes 21 and the screw holes 11. As shown in Figure 4 shown, the fastening screws are internal hexagonal screws.

[0023] In this embodiment, the rear riser 1 is a sleeve pipe, and the fitting pipe 2 is an inserting pipe adapted to the inner cavity of the rear riser 1.

[0024] The armrest frame in this embodiment includes a front vertical rod 31, a rear riser 1, an upper steel rod 32 connecting the front vertical rod 31 and the rear riser 1, and a side baffle rod 33 connecting the upper steel rod 32 and the seat cushion frame.

[0025] The backrest frame in this embodiment includes a first backrest frame. The first backrest frame includes a first left side rod 51, a first right side rod 52, a first upper cross rod 53, a first lower cross rod 54 that enclose a frame, and a neutral rod 55 connecting the first upper cross rod 53 and the first lower cross rod 54. The first lower cross rod 54 is higher than the rear riser 1.

[0026] In this embodiment, the first left rod 51, the first right rod 52 and the first upper cross rod 53 are integrally bent from steel pipes; the first lower cross rod 54 and the neutral rod 55 are made of flat steel bars. The left and right ends of the first lower cross rod 54 are respectively connected to the first left rod 51 and the first right rod 52 by welding, and the upper and lower ends of the neutral rod 55 are respectively connected to the first upper cross rod 53 and the first upper cross rod 53 by welding.

[0027] In this embodiment, the front vertical rod 31 and the upper steel rod 32 are made of pipe fittings or solid steel bars; the seat cushion frame is made of pipe fittings or solid steel bars; the side retaining rod 33 is made of flat steel bars; the seat cushion frame includes a front bar 41 of the seat cushion frame, a rear bar 42 of the seat cushion frame, a left bar 43 of the seat cushion frame, and a right rod 44 of the seat cushion frame. Second connecting ears 45 for fixing the seat cushion covering are provided on the inner sides of the front bar 41 and the rear bar 42 of the seat cushion frame.

[0028] In this embodiment, there is 1 height adjustment screw hole 11. In addition, in order to adjust the height of the backrest, the height adjustment screw hole 11 can be set to 2 or 3 or 4. Users of different heights can adjust the backrest to different heights according to their needs.

[0029] During assembly, the backrest frame, the armrest frame, and the seat cushion frame are respectively wrapped with soft covering bodies. The mating pipes 2 exposed on both sides of the backrest frame are inserted into the rear vertical pipe 1 of the armrest frame, and the mating pipes 2 and the rear vertical pipe 1 are fixed by passing an Allen key screw through the fixing hole 21 and the screw hole 11, and then hidden by the covering body zipper. As Figure 5 shown in the assembled swivel chair, the rear waist part is hollow.

[0030] Embodiment Two: As Figure 5 shown, in this embodiment, the rear vertical pipe 1 is an inserted pipe, and the mating pipe 2 is a sleeve adapted to the outer diameter of the rear vertical pipe 1.

[0031] The backrest frame of this embodiment includes a second backrest frame and a waist and hip frame. The second backrest frame includes a second left rod 61, a second right rod 62, an upper arc rod 63, a lower arc rod 64, a second neutral rod 65 connecting the upper arc rod 63 and the lower arc rod 64, and a middle cross rod 66 connecting the second left rod 61 and the second right rod 62 that form a frame. The lower arc rod 64 is higher than the rear vertical pipe 1; the waist and hip frame includes a lower arc rod 73 of the waist and hip, a left rod 71 of the waist and hip and a right rod 72 of the waist and hip respectively connecting the upper parts of both ends of the lower arc rod 73 of the waist and hip. The upper part of the left rod 71 of the waist and hip is connected to the left side of the lower arc rod 64, and the upper part of the right rod 72 of the waist and hip is connected to the right side of the lower arc rod 64. The lower end of the second neutral rod 65 extends and is welded to the lower arc rod 64; a first connecting ear 74 for fixing the seat cushion covering is provided on the inner side of the lower arc rod 73 of the waist and hip.

[0032] There are two second neutral rods 65, middle cross rods 66 and third neutral rods 75 in this embodiment, and the middle cross rod 66 is made of iron wire.

[0033] In this embodiment, the second left rod 61, the second right rod 62 and the upper arc rod 63 are made by bending and integrally folding a steel pipe; the second neutral rod 65, the left hip rod 71, the right hip rod 72 and the lower arc rod 73 of the hip are made of steel pipes; the lower arc rod 64 is made of a flat steel bar.

[0034] During assembly, as Figure 4 , 6 shown, the backrest frame, the armrest frame and the seat cushion frame are respectively wrapped with a soft covering body. The rear risers 1 exposed on both sides of the armrest frame are inserted into the mating pipes 2 exposed on both sides of the backrest frame, fixed by inner hexagon screws, and then hidden by the covering body zipper.

[0035] The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A connecting structure between a chair backrest and an armrest, comprising a backrest and an armrest. The backrest includes a backrest skeleton and a backrest covering body, and the armrest includes an armrest skeleton and an armrest covering body. The armrest skeleton is connected to the seat cushion skeleton, and it is characterized in that: A rear riser (1) is provided at the rear of the armrest frame. At least one height adjustment screw hole (11) is provided at the upper part of the rear riser (1). Matching pipes (2) adapted to the rear riser (1) are provided at the lower parts on both sides of the backrest frame. Fixing holes (21) adapted to the screw holes (11) provided on the rear riser (1) are provided on the matching pipes (2). The rear riser (1) and the matching pipes (2) are sleeved and fixedly connected by tightening screws in cooperation with the fixing holes (21) and the screw holes (11).

2. The connecting structure between a chair backrest and an armrest according to claim 1, characterized in that: The rear riser (1) is a sleeve pipe, and the matching pipe (2) is an inserted pipe adapted to the inner cavity of the rear riser (1).

3. A connecting structure between a chair backrest and an armrest according to claim 1, characterized in that: The rear riser (1) is an inserted pipe, and the matching pipe (2) is a sleeve pipe adapted to the outer diameter of the rear riser (1).

4. A connecting structure between a chair backrest and an armrest according to claim 1, characterized in that: The armrest frame includes a front vertical rod (31), a rear riser (1), an upper steel rod (32) connecting the front vertical rod (31) and the rear riser (1), and a side stop rod (33) connecting the upper steel rod (32) and the seat cushion frame.

5. A connecting structure between a chair backrest and an armrest according to claim 1, characterized in that: The backrest frame includes a first backrest frame. The first backrest frame includes a first left side rod (51), a first right side rod (52), a first upper cross rod (53), a first lower cross rod (54) that enclose a frame, and a middle vertical rod (55) connecting the first upper cross rod (53) and the first lower cross rod (54). The first lower cross rod (54) is higher than the rear riser (1).

6. The connecting structure of a chair backrest and armrest according to claim 1, characterized in that: The backrest frame includes a second backrest frame and a waist and hip frame. The second backrest frame includes a second left side rod (61), a second right side rod (62), an upper arc rod (63), a lower arc rod (64), a second middle vertical rod (65) connecting the upper arc rod (63) and the lower arc rod (64), and a middle cross rod (66) connecting the second left side rod (61) and the second right side rod (62). The lower arc rod (64) is higher than the rear riser (1); The waist and hip frame includes a waist and hip lower arc rod (73), a waist and hip left side rod (71) and a waist and hip right side rod (72) respectively connecting the upper parts of both ends of the waist and hip lower arc rod (73). The upper part of the waist and hip left side rod (71) is connected to the left side of the lower arc rod (64), and the upper part of the waist and hip right side rod (72) is connected to the right side of the lower arc rod (64). The lower end of the second middle vertical rod (65) extends and is welded to the lower arc rod (64); A first connecting ear (74) for fixing the seat cushion covering body is provided inside the waist and hip lower arc rod (73).

7. A connecting structure between a chair backrest and an armrest according to claim 1, characterized in that: There are 1 - 4 height adjustment screw holes (11).

8. A connecting structure between a chair backrest and an armrest according to claim 5, characterized in that: The first left side rod (51), the first right side rod (52), and the first upper cross rod (53) are integrally bent and made of steel pipes; the first lower cross rod (54) and the middle vertical rod (55) are made of flat steel bars. The left and right ends of the first lower cross rod (54) are respectively connected to the first left side rod (51) and the first right side rod (52) by welding, and the upper and lower ends of the middle vertical rod (55) are respectively connected to the first upper cross rod (53) and the first upper cross rod (53) by welding.

9. The connecting structure of a chair backrest and armrest according to claim 6, characterized in that: There are two of each of the second middle vertical rod (65), the middle cross rod (66), and the third middle vertical rod (75), and the middle cross rod (66) is made of iron wire; The second left rod (61), the second right rod (62) and the upper arc rod (63) are made by bending and integrally folding a steel pipe; the second neutral rod (65), the left hip rod (71), the right hip rod (72) and the lower hip arc rod (73) are made of steel pipes; the lower arc rod (64) is made of a flat steel bar.

10. A connecting structure between a chair backrest and an armrest according to claim 4, characterized in that: The front vertical rod (31) and the upper steel rod (32) are made of pipe fittings or solid steel bars; the seat cushion frame is made of pipe fittings or solid steel bars; the side baffle rod (33) is made of a flat steel bar.

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