Portable stand chair

Abstract

The utility model discloses a portable stand chair which comprises a seat frame and a backrest frame, the seat frame and the backrest frame are matched in a rotating mode, a seat cushion is installed on the seat frame, the backrest frame comprises two stand columns, two supporting columns and two adjusting columns, the two stand columns are symmetrically fixed to the top of the seat frame, one ends of the two supporting columns are matched with the tops of the stand columns in a hinged mode, and the other ends of the two supporting columns are matched with the tops of the adjusting columns in a hinged mode. The adjusting column is slidably arranged at the top of the supporting column, a plurality of adjusting holes communicated with the interior of the adjusting column are formed in the back of the adjusting column, matching holes corresponding to the adjusting holes are formed in the supporting column, an elastic piece is installed in the supporting column, one end of the elastic piece is fixedly connected with the inner wall of the supporting column, and a first telescopic ball is fixed to the other end of the elastic piece. The first telescopic balls are matched with the matching holes and the adjusting holes, the telescopic balls play a role in limiting the adjusting columns, the two adjusting columns and the two supporting columns are further provided with supporting cloth strips facilitating supporting of the human body, and the problems that in the prior art, a backrest frame of a stand chair is designed in a fixed mode, adjustment cannot be conducted, and comfort is poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of grandstand chair technology, and in particular to a portable grandstand chair. Background Technology

[0002] With the rapid development of social productivity, people's material enjoyment and spiritual pursuits have greatly improved. The number of large-scale sporting events, concerts, and galas is increasing, giving rise to derivative products such as movable grandstands and grandstand chairs. For movable grandstands in various stadiums and competition venues, the design of the seating needs to be not only sturdy and durable, but also aesthetically pleasing, durable, and easy to install. Traditional grandstand seating is a long, rectangular bench structure made of rigid materials, resulting in poor comfort when sitting for extended periods. There is no back support, leading to discomfort in the buttocks after prolonged sitting.

[0003] Prior art document CN221012549U provides a grandstand chair, including a seat frame and a backrest frame, which are rotatably connected. Armrest frames are provided in pairs between the seat frame and the backrest frame. Each armrest frame includes an armrest bar and a connecting rod. The front end of the armrest bar is connected to the upper end of the connecting rod, and the rear end of the armrest bar is connected to the backrest frame. The lower end of the connecting rod is rotatably connected to the seat frame. A telescopic rod is provided at the upper end of the connecting rod, and the upper end of the telescopic rod is rotatably connected to the armrest bar. The lower end of the telescopic rod passes through the connecting rod, and a telescopic channel is provided within the connecting rod. The diameter of the telescopic channel is larger than the diameter of the telescopic rod. The telescopic rod passes through the telescopic channel and can move up and down within it. When folding, the backrest frame is driven to rotate forward, which in turn moves the armrest bar forward and downward, pressing the telescopic rod, causing it to retract into the connecting rod. The telescopic rod then drives the connecting rod to rotate downward. This design facilitates folding and improves user comfort when seated.

[0004] In the above solution, the backrest frame of the grandstand chair is a fixed design and cannot be adjusted. As a result, the grandstand chair does not provide good back support for some taller people during actual use, and the users do not feel comfortable when leaning against the backrest frame. To address the above problems, a solution is proposed below. Utility Model Content

[0005] The purpose of this invention is to provide a portable grandstand chair to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A portable grandstand chair includes a seat frame and a backrest frame, which are rotatably connected. A seat cushion is installed on the seat frame. The backrest frame includes two uprights, two support columns, and two adjusting columns. The two uprights are symmetrically fixed to the top of the seat frame. One end of each support column is hinged to the top of the upright. The adjusting column is slidably disposed on the top of the support column. The back of the adjusting column has multiple adjusting holes communicating with its interior. The support column has mating holes corresponding to the adjusting holes. A spring is installed inside the support column. One end of the spring is fixedly connected to the inner wall of the support column. The other end of the spring is fixed with a telescopic ball, which is adapted to the mating hole and the adjusting hole. The telescopic ball serves to limit the adjustment column. Support strips for supporting the human body are also provided on the two adjusting columns and the two support columns.

[0008] Preferably, both support columns are equipped with limiting columns, which are slidably disposed on the outer wall of the support column. The inner bottom wall of the adjusting column is installed on the outer wall of the limiting column, and the adjusting column achieves better adaptation with the support column through the limiting columns.

[0009] Preferably, armrests are symmetrically arranged on both sides of the seat frame. One end of each armrest is rotatably connected to the seat frame, and the other end is rotatably connected to the backrest frame. The backrest frame is positioned between the two armrests. Each armrest includes an armrest bar and an adjustable telescopic rod. One side wall of the armrest bar is hinged to the side wall of the support column, and the bottom of the other end of the armrest bar is hinged to the adjustable telescopic rod. The side wall of the adjustable telescopic rod away from the armrest bar is hinged to the seat frame.

[0010] Preferably, the adjustable telescopic rod includes a telescopic rod and a connecting rod. The telescopic rod is slidably disposed on the top of the connecting rod. The top of the telescopic rod is hinged to the armrest rod. The bottom side wall of the connecting rod is hinged to the seat frame. The inner diameter of the connecting rod is larger than the inner diameter of the telescopic rod. The outer wall of the telescopic rod is provided with a telescopic ball, and the connecting rod is provided with an installation hole that mates with the telescopic ball.

[0011] Preferably, a reinforcing rib is fixed between the two support columns, and a second reinforcing rib is fixed between the two adjustment columns.

[0012] Preferably, a back strap is also fixed to the side of the seat frame near the upright.

[0013] Preferably, a plug is also installed on the top of the adjusting column.

[0014] Beneficial effects: After the seat frame is installed in the stands, users can adjust the length of the backrest frame according to their own height, making the backrest frame support people of different heights, thus broadening its application range and enhancing comfort. When the length of the backrest frame needs to be adjusted, users can press the telescopic ball on the back of the adjustment column. By pressing the telescopic ball into the support column, the movement of the adjustment column is no longer limited. The extension distance of the support column can be adjusted by pulling the adjustment column. Through the multiple adjustment holes, multiple adjustment positions of the adjustment column can be achieved, which can accommodate different users. Compared with the fixed structure in the existing technology, it is more practical and more comfortable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0016] Figure 2 This is a schematic diagram illustrating the structure of the grandstand chairs after they are covered, as shown in the example.

[0017] Figure 3 This is a schematic diagram illustrating the structure of a grandstand chair with the seat cushion removed, as shown in the example.

[0018] Figure 4 This is an exploded structural diagram illustrating the backrest frame of the grandstand chairs, used as an example.

[0019] Figure 5 This is a schematic diagram illustrating the structure of the grandstand chair backrest after one adjustment, as shown in the example.

[0020] Figure 6 This is a schematic diagram illustrating the structure of the grandstand chair backrest after two-position adjustment, as shown in the example.

[0021] Reference numerals in the attached diagram: 1. Seat frame; 2. Backrest frame; 21. Upright column; 22. Support column; 23. Adjustment column; 24. Adjustment hole; 25. Mating hole; 26. Spring; 27. Telescopic ball one; 28. Support strip; 29. ​​Limiting column; 3. Seat cushion; 4. Armrest frame; 5. Armrest bar; 6. Adjustable telescopic rod; 61. Telescopic rod; 62. Connecting rod; 63. Telescopic ball two; 7. Reinforcing rib one; 8. Reinforcing rib two; 9. Back strap; 10. Plug. Detailed Implementation

[0022] See Figures 1 to 6As shown, a portable grandstand chair includes a seat frame 1 and a backrest frame 2. The seat frame 1 and the backrest frame 2 are rotatably connected. A seat cushion 3 is installed on the seat frame 1. Armrest frames 4 are symmetrically arranged on both sides of the seat frame 1. One end of the armrest frame 4 is rotatably connected to the seat frame 1, and the other end of the armrest frame 4 is rotatably connected to the backrest frame 2. Two hooks are also installed at the bottom of the seat frame 1. When the grandstand chair needs to be placed on the grandstand, the seat frame 1 can be placed on the upper part of the grandstand first, and the hooks at the bottom of the seat frame 1 can be set in the cavity at the bottom of the grandstand. The hooks are adapted to the grandstand and support the seat frame 1 to prevent the seat frame 1 from moving. The armrest frames 4 on both sides of the seat frame 1 can support the arms, and the backrest frame 2 can support the back of the person, making it more comfortable for the person to sit.

[0023] The backrest frame 2 includes two uprights 21, two support columns 22, and two adjusting columns 23. The two uprights 21 are symmetrically fixed to the top of the seat frame 1. One end of each support column 22 is hinged to the top of the uprights 21. The adjusting columns 23 are slidably mounted on the top of the support columns 22. The back of the adjusting column 23 has multiple adjusting holes 24 communicating with its interior. The support columns 22 have mating holes 25 corresponding to the adjusting holes 24. A spring piece 26 is installed inside the support column 22. One end of the spring piece 26 is fixedly connected to the inner wall of the support column 22. The other end of the spring piece 26 is fixed with a telescopic ball 27. The telescopic ball 27 is adapted to the mating hole 25 and the adjusting hole 24. The telescopic ball 27 serves to limit the adjustment column 23. When a person sits on the bleacher chair, the length of the backrest frame 2 can be adjusted according to their own height, so that the backrest frame 2 can support people of different heights and improve its practicality.

[0024] During adjustment, the user can press the telescopic ball 27 with both hands simultaneously. By applying pressure to the telescopic ball 27, it is pushed into the mating hole 25 of the support column 22. This removes the limitation on the movement of the adjusting column 23, allowing the extension distance of the support column 22 to be adjusted by pulling the adjusting column 23. As the adjusting column 23 continues to move, the next adjusting hole 24 of the adjusting column 23 will correspond to the mating hole 25. The telescopic ball 27 is pushed out of the mating hole 25 by the elastic force of the spring piece 26 and re-enters the adjusting hole 24, thus providing limiting support for the adjusting column 23. Through the multiple adjusting holes 24, multiple adjustments of the adjusting column 23 can be achieved, accommodating different users.

[0025] The two adjusting columns 23 and the two supporting columns 22 are also equipped with supporting fabric strips 28 to facilitate the support of the human body. By designing supporting fabric strips 28 on the adjusting columns 23 and the supporting columns 22, when the human body leans against the backrest frame 2, the supporting fabric strips 28 can support the back of the human body. A reinforcing rib 1 7 is also fixed between the two supporting columns 22, and a reinforcing rib 2 8 is also fixed between the two adjusting columns 23. The reinforcing ribs 1 7 and 2 8 designed between the supporting columns 22 and the adjusting columns 23 can improve the strength between the supporting columns 22 and the adjusting columns 23, so as to better support the human body.

[0026] Both support columns 22 are equipped with limiting columns 29, which are slidably mounted on the outer wall of the support column 22. The inner bottom wall of the adjusting column 23 is mounted on the outer wall of the limiting column 29. The adjusting column 23 achieves better fit with the support column 22 through the limiting column 29. The top of the limiting column 29 is also provided with a U-shaped groove, and the telescopic ball 27 is set in the U-shaped groove. The setting of the limiting column 29 ensures that there is a gap between the support column 22 and the adjusting column 23. When the telescopic ball 27 is pushed, it will move into the gap between the support column 22 and the adjusting column 23, which facilitates the better ejection of the telescopic ball 27 and prevents the telescopic ball 27 from being pushed into the support column 22 and getting stuck later, thus preventing the telescopic ball 27 from ejecting properly.

[0027] The armrest frame 4 includes an armrest bar 5 and an adjustable telescopic rod 6. One end of the armrest bar 5 is hinged to the side wall of the support column 22, and the bottom of the other end of the armrest bar 5 is hinged to the adjustable telescopic rod 6. The side wall of the adjustable telescopic rod 6 away from the armrest bar 5 is hinged to the seat frame 1. The armrest frame 4 is hinged to the seat frame 1 and the backrest frame 2, which facilitates the rotation of the armrest frame 4 and allows the grandstand chair to be folded and stored. The seat frame 1 is also fixed with a back strap 9 on the side near the column 21. The back strap 9 is designed so that users can carry the grandstand chair by carrying it on their back.

[0028] The adjustable telescopic rod 6 includes a telescopic rod 61 and a connecting rod 62. The telescopic rod 61 is slidably mounted on the top of the connecting rod 62. The top of the telescopic rod 61 is hinged to the armrest rod 5. The bottom side wall of the connecting rod 62 is hinged to the seat frame 1. The inner diameter of the connecting rod 62 is larger than the inner diameter of the telescopic rod 61. The outer wall of the telescopic rod 61 is provided with a telescopic ball 63. The connecting rod 62 has a mounting hole that mates with the telescopic ball 63. When the grandstand chair needs to be folded, the backrest frame 2 can be extended to the lowest position first, and then the telescopic ball 63 can be pressed to fold it. When pressed into the gap between the telescopic rod 61 and the connecting rod 62, the telescopic ball 63 no longer limits the movement of the telescopic rod 61, allowing the telescopic rod 61 to penetrate deeper into the connecting rod 62. During the extension and retraction process, the telescopic rod 61 pulls the connecting rod 62 to rotate. Through the connecting rod 62 and the telescopic rod 61, the armrest rod 5 can be pulled to rotate, and the armrest rod 5 can pull the support column 22 on the backrest frame 2 to rotate, thereby realizing the synchronous rotation of the armrest frame 4 and the backrest frame 2, thus realizing the folding of the grandstand chair, making the grandstand chair portable.

[0029] A rubber stopper 10 is also installed on the top of the adjusting column 23. By installing the stopper 10 on the top of the adjusting column 23, the top of the adjusting column can be sealed and protected, and the user can be prevented from being scratched by the adjusting column 23.

Claims

1. A portable grandstand chair, comprising a seat frame (1) and a backrest frame (2), characterized in that, The seat frame (1) and the backrest frame (2) are rotatably connected. A seat cushion (3) is installed on the seat frame (1). The backrest frame (2) includes two uprights (21), two support columns (22), and two adjusting columns (23). The two uprights (21) are symmetrically fixed to the top of the seat frame (1). One end of each support column (22) is hinged to the top of the upright (21). The adjusting column (23) is slidably disposed on the top of the support column (22). The back of the adjusting column (23) is provided with multiple adjusting holes (24) communicating with its interior. The support columns (22) The support column (22) has a mating hole (25) corresponding to the adjustment hole (24). A spring piece (26) is installed inside the support column (22). One end of the spring piece (26) is fixedly connected to the inner wall of the support column (22). The other end of the spring piece (26) is fixed with a telescopic ball (27). The telescopic ball (27) is adapted to the mating hole (25) and the adjustment hole (24). The telescopic ball (27) serves as a limit for the adjustment column (23). The two adjustment columns (23) and the two support columns (22) are also provided with support strips (28) to facilitate the support of the human body.

2. A portable grandstand chair according to claim 1, characterized in that, Both of the support columns (22) are equipped with limit posts (29), which are slidably disposed on the outer wall of the support column (22). The inner bottom wall of the adjusting column (23) is installed on the outer wall of the limit post (29). The adjusting column (23) achieves better adaptation with the support column (22) through the limit post (29).

3. A portable grandstand chair according to claim 1, characterized in that, The seat frame (1) is symmetrically provided with armrests (4) on both sides. One end of the armrest (4) is rotatably connected to the seat frame (1), and the other end of the armrest (4) is rotatably connected to the backrest frame (2). The backrest frame (2) is arranged between the two armrests (4). The armrest (4) includes an armrest rod (5) and an adjusting telescopic rod (6). One end of the armrest rod (5) is hinged to the side wall of the support column (22), and the bottom of the other end of the armrest rod (5) is hinged to the adjusting telescopic rod (6). The side wall of the adjusting telescopic rod (6) away from the armrest rod (5) is hinged to the seat frame (1).

4. A portable grandstand chair according to claim 3, characterized in that, The adjustable telescopic rod (6) includes a telescopic rod (61) and a connecting rod (62). The telescopic rod (61) is slidably disposed on the top of the connecting rod (62). The top of the telescopic rod (61) is hinged to the armrest rod (5). The bottom side wall of the connecting rod (62) is hinged to the seat frame (1). The inner diameter of the connecting rod (62) is larger than the inner diameter of the telescopic rod (61). The outer wall of the telescopic rod (61) is provided with a telescopic ball II (63). The connecting rod (62) is provided with an installation hole that cooperates with the telescopic ball II (63).

5. A portable grandstand chair according to claim 1, characterized in that, A reinforcing rib (7) is fixed between the two support columns (22), and a reinforcing rib (8) is fixed between the two adjustment columns (23).

6. A portable grandstand chair according to claim 1, characterized in that, The seat frame (1) is also fixed with a back strap (9) on the side near the upright (21).

7. A portable grandstand chair according to claim 1, characterized in that, A plug (10) is also installed on the top of the adjusting column (23).

Images