Stable anti-toppling office chair

Abstract

A stable anti-toppling office chair is used for solving the problems that most of office chairs with a rotating function in the background technology are suspended after a backrest is rotated, however, the office chairs have the hidden danger that the whole office chairs are turned over backwards when the gravity center leans against the back, and the office chairs are inconvenient to use. Therefore, the technical problem that the backrest of the rotated office chair needs to be supported by a supporting assembly is solved. The backrest is arranged at the top of the seat plate, the rollers are arranged at the bottom of the seat plate, and the backrest is rotatably connected with the seat plate.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a stable, anti-tipping office chair. Background Technology

[0002] Office chairs refer to various types of chairs provided for convenience during daily work and social activities. In a narrow sense, office chairs refer to backrested chairs used for desk work in a seated position, while in a broad sense, office chairs include all chairs used in offices.

[0003] In the existing technology, most office chairs with swivel function have their backrests suspended after swivel. However, such office chairs have the potential to tip over backward when the center of gravity shifts backward. Therefore, a support component is needed to support the backrest of the office chair after it has swiveled. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a stable, anti-tipping office chair. This addresses the issue mentioned in the background art where, in most office chairs with rotating functions, the backrest is suspended after rotation. However, such office chairs have the potential to tip backward when the center of gravity shifts backward. Therefore, a support component is needed to support the backrest of the office chair after rotation.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A stable, anti-tipping office chair includes a seat, a backrest located at the top of the seat, and casters located at the bottom of the seat. The backrest is rotatably connected to the seat. A first mounting groove, aligned with the length of the backrest, is provided on the back of the backrest. Two sliders are slidably disposed within the first mounting groove along the length of the backrest. A first rotating shaft, parallel to the seat width direction, is rotatably disposed between the two sliders. A telescopic rod is fixedly disposed on the outer periphery of the first rotating shaft. A first positioning block is provided at the other end of the telescopic rod. A second mounting groove is provided on the surface of the first positioning block away from the telescopic rod. A mounting block is detachably disposed inside the second mounting groove. A bottom side of the mounting block is provided with… The third mounting slot has through holes on both side walls. Bearings are fixed in the two through holes on both side walls of the third mounting slot. A second rotating shaft is fixed between the inner walls of the two bearings on both side walls of the third mounting slot. A connecting block is fixed on the outer periphery of the second rotating shaft. The other end of the connecting block extends out of the second mounting slot and has a first suction cup at its end. The first suction cup is used to adhere to the ground. A pneumatic rod is fixed at the bottom of the base plate. A second positioning block is fixed at the bottom of the pneumatic rod. A roller is fixed on the outer periphery of the mounting block. A second suction cup is detachably installed at the bottom of the second positioning block. The second suction cup is used to adhere to the ground.

[0007] Working principle:

[0008] This device has two states: office state and leisure state. Office state refers to a 90° angle between the backrest and the seat; leisure state refers to a greater than 90° angle between the backrest and the seat, and the office state is the initial state of this device.

[0009] When switching from office to leisure mode, the initial angle between the backrest and seat is 90°. The steps are as follows: First, activate the gas spring to adjust the chair's height. Second, attach the first suction cup to the ground. Third, rotate the backrest clockwise. Fourth, rotate the telescopic rod counter-clockwise, moving it out of the first mounting slot. Fifth, extend the telescopic rod so that the first positioning block on it is close to the mounting block. Sixth, install the mounting block in the second mounting slot. Seventh, attach the second suction cup to the ground. Eighth, install the second suction cup at the bottom of the second positioning block. These steps describe the installation of the first and second suction cups. When adjusting the backrest's rotation angle after installation, adjust the length of the telescopic rod. The extension and retraction of the telescopic rod causes two sliders to slide in the first mounting slot, and the first and second rotating shafts to rotate, thus coordinating with the backrest's rotation.

[0010] Beneficial effects:

[0011] 1. By setting the first positioning block, the second mounting slot, and the mounting block, the first suction cup can be installed and removed, preventing the first suction cup from being unable to extend into the first mounting slot after rotating with the telescopic rod, thus preventing the first suction cup from obstructing the protruding part on the back of the backrest and occupying space.

[0012] 2. After the first suction cup is installed in the first positioning block, the backrest is rotated by setting the first mounting groove, two sliders, the first rotating shaft, the telescopic rod, the first positioning block, the second mounting groove, the mounting block, the third mounting groove, the second rotating shaft, and the connecting block. For example, during the rotation of the backrest, the extension and retraction of the telescopic rod causes the two sliders to slide in the first mounting groove, the first rotating shaft to rotate, and the second rotating shaft to rotate. Only when the above technical features work together can the backrest rotate normally.

[0013] 3. After the first suction cup is installed in the first positioning block, the first suction cup adheres tightly to the ground, so that the telescopic rod supports the backrest after the backrest is rotated, thus avoiding the risk of the office chair tipping backward.

[0014] 4. By setting a second suction cup, the second suction cup adheres tightly to the ground, further improving the overall stability of the office chair in a relaxed state. Attached Figure Description

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

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3 for Figure 2 A schematic diagram of the backrest when it is rotated and aligned with the seat.

[0018] Figure 4 for Figure 3 A magnified structural schematic diagram of the first positioning block from the side.

[0019] In the above figures: seat plate 1, square block 101, auxiliary block 102, backrest 2, roller 3, first mounting groove 4, slider 5, first rotating shaft 6, telescopic rod 7, inner rod 701, sleeve 702, first positioning block 8, second mounting groove 9, mounting block 10, third mounting groove 11, second rotating shaft 12, connecting block 13, first suction cup 14, first mounting cylinder 1401, connector 1402, suction cup lip 1403, pneumatic rod 15, second positioning block 16, second suction cup 17, second mounting cylinder 1701, first rotating rod 18, locking plate 19, through hole 20, first positioning groove 23, first threaded hole 24, second positioning groove 25, positioning cylinder 26, strip hole 27, extension block 28, locking block 29, second threaded hole 30, through hole 32, working block 33, working groove 34, spring 35, plug-in cylinder 36, sliding block 37, sliding groove 38. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] Example:

[0022] like Figures 1-4 As shown, a stable, anti-tipping office chair includes a seat 1, a backrest 2 located at the top of the seat 1, and casters 3 located at the bottom of the seat 1. The backrest 2 is rotatably connected to the seat 1. A first mounting groove 4, aligned with the length of the backrest 2, is provided on the back of the backrest 2. Two sliders 5 are slidably mounted within the first mounting groove 4 along the length of the backrest 2. A first rotating shaft 6, parallel to the seat width direction of the seat 1, is rotatably mounted between the two sliders 5. Both ends of the first rotating shaft 6 are rotatably connected to the two sliders 5 via bearings. A telescopic rod 7 is fixedly mounted on the outer periphery of the first rotating shaft 6. Figure 4As shown, the other end of the telescopic rod 7 is provided with a first positioning block 8. The surface of the first positioning block 8 away from the telescopic rod 7 is provided with a second mounting groove 9. The second mounting groove 9 is detachably provided with a mounting block 10. The surface of the mounting block 10 away from the telescopic rod 7 is provided with a third mounting groove 11. Both side walls of the third mounting groove 11 are provided with through holes. Bearings are fixed in the two through holes on both side walls of the third mounting groove 11. A second rotating shaft 12 is fixed between the inner walls of the two bearings on both side walls of the third mounting groove 11. A connecting block 13 is fixed on the outer periphery of the second rotating shaft 12. The other end of the connecting block 13 extends out of the second mounting groove 9 and its end is provided with a first suction cup 14. The first suction cup 14 is used to adhere to the ground. The bottom of the seat plate 1 is provided with a pneumatic rod 15. The bottom end of the pneumatic rod 15 is fixed with a second positioning block 16. The roller 3 is fixed on the outer periphery of the mounting block 10. The bottom of the second positioning block 16 is detachably provided with a second suction cup 17. The second suction cup 17 is used to adhere to the ground.

[0023] By setting the first positioning block 8, the second mounting groove 9, and the mounting block 10, the first suction cup 14 can be installed and removed, preventing the first suction cup 14 from being unable to extend into the first mounting groove 4 after rotating with the telescopic rod 7, thus causing the first suction cup 14 to form an obstruction on the protruding part of the backrest 2 and occupy space.

[0024] After the first suction cup 14 is installed in the first positioning block 8, the first mounting groove 4, two sliders 5, the first rotating shaft 6, the telescopic rod 7, the first positioning block 8, the second mounting groove 9, the mounting block 10, the third mounting groove 11, the second rotating shaft 12, and the connecting block 13 are set to cooperate with the rotation of the backrest 2. For example, during the rotation of the backrest 2, the extension and retraction of the telescopic rod 7 causes the two sliders 5 to slide in the first mounting groove 4, the first rotating shaft 6 to rotate, and the second rotating shaft 12 to rotate. Only when the above technical features work together can the backrest 2 rotate normally.

[0025] After the first suction cup 14 is installed in the first positioning block 8, the first suction cup 14 adheres tightly to the ground, so that after the backrest 2 is rotated, the telescopic rod 7 supports the backrest 2, avoiding the risk of the office chair tipping backward; by setting the second suction cup 17, the second suction cup 17 adheres tightly to the ground, further improving the overall stability of the office chair in the leisure state.

[0026] like Figure 2As shown, the seat plate 1 includes a square block 101 and two auxiliary blocks 102 fixed on both sides of the same end of the square block 101. A first rotating rod 18 is rotatably provided between the two auxiliary blocks 102. The two ends of the first rotating rod 18 are rotatably connected to the two auxiliary blocks 102 through bearings. The backrest 2 is fixedly sleeved on the outer periphery of the first rotating rod 18 at one end near the seat plate 1. A locking plate 19 is fixedly provided on the outer periphery of the section of the first rotating rod 18 that passes through one of the auxiliary blocks 102. The locking plate 19 is provided with a through hole 20. The side wall of one of the auxiliary blocks 102 through which the first rotating rod 18 passes away from the backrest 2 is provided with a mounting hole. It also includes a plug rod, which is used to pass through the through hole 20 and into the mounting hole, thereby locking the backrest 2.

[0027] like Figures 1-3 As shown, the second positioning block 16 has a vertical first positioning groove 23 on its bottom side and a first threaded hole 24 on its outer side wall. The second suction cup 17 includes a second mounting cylinder 1701, a second positioning groove 25 on its top surface, a positioning cylinder 26 that slides vertically inside the second positioning groove 25, a vertical strip hole 27 on the outer side wall of the second mounting cylinder 1701, an extension block 28 fixedly mounted on the side wall of the positioning cylinder 26, the extension block 28 passing through the strip hole 27 and sliding vertically within the strip hole 27, a long locking block 29 fixedly mounted at one end of the extension block 28 extending out of the strip hole 27, a second threaded hole 30 on the top of the locking block 29, and a bolt. When the locking block 29 is inserted into the first positioning groove 23 along with the positioning cylinder 26, the bolt is inserted into the first threaded hole 24 and the second threaded hole 30 to fix the second suction cup 17. This bolt-locking method is common, simple, and easy to operate.

[0028] like Figures 1-3 As shown, the telescopic rod 7 includes an inner rod 701 and a sleeve 702. The inner rod 701 includes a threaded section and a smooth section. The threaded section of the inner rod 701 is threadedly connected to the sleeve 702, and the smooth section of the inner rod 701 is fixedly connected to the first rotating shaft 6. A bearing is fixedly mounted on the surface of the first positioning block 8 facing the sleeve 702. The end of the sleeve 702 is fixed to the inner wall of the bearing on the first positioning block 8. Therefore, the sleeve 702 and the first positioning block 8 are rotatably connected through the bearing. Thus, the telescopic rod 7 is extended or retracted by rotating the sleeve 702, which facilitates operation.

[0029] like Figure 4As shown, the second mounting groove 9 has through holes 32 on both sides. The mounting block 10 has working blocks 33 fixed to its two sidewalls facing the through holes 32. Each working block 33 has a working groove 34 on its side facing the through hole 32. A spring 35 is fixed inside the working groove 34, and a plug-in cylinder 36 is fixed to the other end of the spring 35. The working groove 34 also has sliding grooves 38 on both sides. The plug-in cylinder 36 has sliding blocks 37 fixed to its two sidewalls. The sliding blocks 37 slide within the corresponding sliding grooves 38. The plug-in cylinder 36 is pushed into the corresponding through hole 32 as the spring 35 extends, thus installing the mounting block 10. This method of installing the mounting block 10 is relatively simple and easy to operate. The sliding blocks 37 and sliding grooves 38 limit the position of the plug-in cylinder 36, preventing it from being pushed out of the working groove 34 by the corresponding spring 35.

[0030] like Figure 4 As shown, the first suction cup 14 includes a first mounting cylinder 1401, a connector 1402, and a suction cup lip 1403. One end of the first mounting cylinder 1401 is fixedly connected to the end of the connecting block 13 away from the second rotating shaft 12. The first mounting cylinder 1401 has an internal thread, and the connector 1402 has an external thread. The connector 1402 is threaded into the inside of the first mounting cylinder 1401. The suction cup lip 1403 is connected to the end of the connector 1402 away from the first mounting cylinder 1401. This method allows for the replacement of the suction cup lip 1403, thus facilitating its replacement.

[0031] Working principle:

[0032] This device has two states: office state and leisure state. The office state refers to the angle between the backrest 2 and the seat 1 being 90°; the leisure state refers to the angle between the backrest 2 and the seat 1 being greater than 90°, and the office state of this device is the initial state.

[0033] When switching from office mode to leisure mode, initially, the angle between the backrest 2 and the seat 1 is 90°. First, activate the gas spring 15 to adjust the height of the office chair. Second, attach the suction cup lip 1403 of the first suction cup 14 to the ground. Third, pull the connecting rod to disengage it from the through hole 20 and rotate the backrest 2 clockwise. Fourth, rotate the telescopic rod 7 counterclockwise and rotate it out of the first mounting slot 4. Fifth, rotate the sleeve 702 to change the length of the telescopic rod 7, so that the first positioning block 8 on the telescopic rod 7 approaches the mounting block 10. Sixth, install the mounting block 10 inside the mounting block 10. The specific operation steps are as follows: The user squeezes the two connecting cylinders 36, at which point the two springs 35 contract, and simultaneously the corresponding sliding blocks 37 on the two connecting cylinders 36 move within the sliding slot 38 and approach the mounting block 10. Then, the mounting block 10 is inserted into the first mounting slot 4. The two insert cylinders 36 are aligned with the two through holes 32 in the mounting groove 9. Then, the pressure on the two insert cylinders 36 is released, and the two springs 35 extend and push the two insert cylinders 36 into the two through holes 32. At this time, the corresponding sliding blocks 37 on the two insert cylinders 36 move in the sliding groove 38 and move away from the mounting block 10, thus completing the installation of the first suction cup 14. The seventh step is to attach the second suction cup 17 to the ground. The eighth step is to install the second suction cup 17 at the bottom of the second positioning block 16. The specific operation steps are as follows: Hold the locking block 29 and move the locking block 29 upward. The vertical upward movement of the locking block 29 causes the extension block 28 to move in the strip hole 27 and the positioning cylinder 26 to extend into the first positioning groove 23. Then, screw the bolt into the second threaded hole 30 on the locking block 29 and the first threaded hole 24 on the second positioning block 16, thus realizing the installation of the second suction cup 17.

[0034] The above steps are the specific steps for installing the first suction cup 14 and the second suction cup 17. When the installation is completed and the rotation angle of the backrest 2 needs to be adjusted, rotate the sleeve 702 to change the length of the telescopic rod 7. During the rotation of the sleeve 702, the extension and retraction of the telescopic rod 7 causes the two sliders 5 to slide in the first mounting groove 4, the first rotating shaft 6 to rotate, and the second rotating shaft 12 to rotate, thus cooperating with the rotation of the backrest 2. The entire operation is then completed.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A stable anti-toppling office chair, comprising a seat plate (1), a backrest (2) arranged on the top of the seat plate (1), and a roller (3) arranged on the bottom of the seat plate (1), characterized in that: The backrest (2) is rotatably connected to the seat plate (1). A first mounting groove (4) with the length direction of the backrest (2) is provided on the back of the backrest (2). Two sliders (5) are slidably arranged in the first mounting groove (4) along the length direction of the backrest (2). A first rotating shaft (6) parallel to the seat width direction of the seat plate (1) is rotatably arranged between the two sliders (5). A telescopic rod (7) is fixedly arranged on the outer periphery of the first rotating shaft (6). A first positioning block (8) is provided at the other end of the telescopic rod (7). A second mounting groove (9) is provided on the surface of the first positioning block (8) away from the telescopic rod (7). A mounting block (10) is detachably arranged inside the second mounting groove (9). A third mounting groove (11) is provided on the surface of the mounting block (10) away from the telescopic rod (7). 1) Both side walls are provided with through holes. Bearings are fixed in the two through holes on both side walls of the third mounting groove (11). A second rotating shaft (12) is fixed between the inner walls of the two bearings on both side walls of the third mounting groove (11). A connecting block (13) is fixed on the outer periphery of the second rotating shaft (12). The other end of the connecting block (13) extends out of the second mounting groove (9) and its end is provided with a first suction cup (14). The first suction cup (14) is used to adhere to the ground. A pneumatic rod (15) is provided at the bottom of the seat plate (1). A second positioning block (16) is fixed at the bottom end of the pneumatic rod (15). The roller (3) is fixed on the outer periphery of the mounting block (10). A second suction cup (17) is detachably provided at the bottom of the second positioning block (16). The second suction cup (17) is used to adhere to the ground.

2. A stable anti-tip office chair according to claim 1, characterized in that: The seat plate (1) includes a square block (101) and two auxiliary blocks (102) fixed on both sides of the same end of the direction block. A first rotating rod (18) is rotatably provided between the two auxiliary blocks (102). The backrest (2) is fixedly sleeved on the outer periphery of the first rotating rod (18) at one end near the seat plate (1). One end of the first rotating rod (18) passes through one of the auxiliary blocks (102), and a locking plate (19) is fixedly provided on the outer periphery of the rod segment through which the first rotating rod (18) passes. A through hole (20) is provided on the locking plate (19). An installation hole is provided on the side wall of one of the auxiliary blocks (102) through which the first rotating rod (18) passes away from the backrest (2). The backrest (2) also includes a plug rod, which is used to pass through the through hole (20) and into the installation hole to lock the backrest (2).

3. The stable anti-tip office chair of claim 1, wherein: The second positioning block (16) has a vertical first positioning groove (23) on its bottom side and a first threaded hole (24) on its side wall; the second suction cup (17) includes a second mounting cylinder (1701), the second mounting cylinder (1701) has a second positioning groove (25) inside, a positioning cylinder (26) is vertically slidably provided inside the second positioning groove (25), the side wall of the second mounting cylinder (1701) has a strip hole (27), and an extension block (28) is fixedly provided on the side wall of the positioning cylinder (26). The extension block (28) passes through the strip hole (27) and slides vertically in the strip hole (27). A long strip-shaped locking block (29) is fixed at one end of the extension block (28) that extends out of the strip hole (27). The top of the locking block (29) is provided with a second threaded hole (30) and also includes a bolt. When the locking block (29) is inserted into the first positioning groove (23) along with the positioning cylinder (26), the bolt is used to insert into the first threaded hole (24) and the second threaded hole (30) to fix the second suction cup (17).

4. The stable, tip-resistant office chair of claim 1, wherein: The telescopic rod (7) includes an inner rod (701) and a sleeve (702), wherein the inner rod (701) is threadedly connected inside the sleeve (702).

5. The stable, tip-resistant office chair of claim 1, wherein: The second mounting groove (9) has through holes (32) on both sides. The mounting block (10) has working blocks (33) fixed on both sides of the through holes (32). Each working block (33) has a working groove (34) on the side of the through hole (32). A spring (35) is fixed inside the working groove (34). A plug-in cylinder (36) is fixed at the other end of the spring (35). The working groove (34) also has sliding grooves (37) on both sides. Sliding blocks (38) are fixed on both sides of the plug-in cylinder (36). The sliding blocks (38) are slidably disposed in the corresponding sliding grooves (37). The plug-in cylinder (36) is used to be pushed into the corresponding through hole (32) as the spring (35) extends, thereby installing the mounting block (10).

6. A stable anti-tip office chair according to claim 5, wherein: The first suction cup (14) includes a first mounting cylinder (1401), a connector (1402), and a suction cup lip (1403). One end of the first mounting cylinder (1401) is fixedly connected to the end of the connecting block (13) away from the second rotating shaft (12). The first mounting cylinder (1401) is provided with an internal thread, and the connector (1402) is provided with an external thread. The connector (1402) is threadedly connected to the inside of the first mounting cylinder (1401). The suction cup lip (1403) is connected to the end of the connector (1402) away from the first mounting cylinder (1401).

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