Multi-angle adjustable office chair
By designing a fully automated height adjustment system and angle adjustment mechanism on the office chair, the problems of imprecise adjustment and lack of backward angle adjustment of traditional office chairs are solved, and efficient and precise height and angle adjustment are achieved, reducing physical fatigue.
Patent Information
- Application Number
- CN202420670460.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Traditional office chairs are prone to air leakage or unstable air pressure during long-term use, resulting in insufficient adjustment and inability to automatically adjust, lack of backward angle adjustment, resulting in physical fatigue.
A multi-angle adjustment office chair is designed, adopting a fully automated height adjustment system, which can achieve precise height adjustment through a single chip computer, and adjust the backward angle through an angle adjustment mechanism.
It realizes fully automated height adjustment without tedious steps, high adjustment accuracy, can adjust the backward angle, relieve neck and back pressure, and reduce fatigue.
Smart Images
Figure CN222565427U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of office chairs, in particular to a multi-angle adjustable office chair. Background Art
[0002] With the development of science and technology and industry, the design and manufacturing technology of office chairs are constantly upgraded. Modern office chairs usually use high-tech materials and precise manufacturing processes to make them more comfortable, durable, convenient and practical. At the same time, they can also meet the requirements of ergonomic principles, so that people can maintain a correct sitting posture during long-term work and reduce the burden on the body. A traditional office chair has a gas pressure column installed at the bottom of the seat or inside the seat bracket. When the button is adjusted by the control button or lever, the seat height of the chair is changed. There are some problems. The traditional office chair is prone to leakage or unstable air pressure after long-term use, resulting in inaccurate adjustment and cumbersome automatic adjustment. At the same time, the reclining angle adjustment is lacking. For this reason, we propose a multi-angle adjustable office chair. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the existing defects, provide an office chair with multi-angle adjustment, fully automatic height adjustment without complicated steps and high height adjustment accuracy, and can adjust the reclining angle of the office chair to relax the body and reduce fatigue, which can effectively solve the problems in the background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-angle adjustable office chair, comprising a rotating shaft, a seat and a mounting frame;
[0005] Rotating shaft: Its front and rear ends are respectively rotatably connected to the bottom of a backrest, the front end of the rotating shaft is provided with an angle adjustment mechanism, the front side of the backrest is provided with a driving mechanism, and the driving mechanism is installed in coordination with the angle adjustment mechanism;
[0006] Seat: It is fixedly connected to the middle of the rotating shaft, and armrests are respectively installed on the front and rear sides of the seat by bolts. The bottom of the seat is rotatably connected to a fixed plate through a bearing, and a height adjustment mechanism is provided at the bottom of the fixed plate;
[0007] Mounting frame: It is located at the bottom of the seat, with a fixed seat fixedly connected to the middle of the mounting frame. The upper surface of the fixed seat is rotatably connected to the bottom of the height adjustment mechanism through bearing 2. The bottom of the mounting frame is provided with evenly distributed universal wheels. The height can be adjusted fully automatically without complicated steps, and the height can be adjusted with high controllable accuracy. At the same time, the reclining angle of the office chair can be adjusted to relax the body and reduce fatigue.
[0008] Furthermore, it also includes a single chip microcomputer, which is arranged on the upper surface of the front armrest, and the input end of the single chip microcomputer is electrically connected to an external power supply to facilitate the regulation of the operation of the motor.
[0009] Furthermore, the angle adjustment mechanism includes a concave wheel, a spring three, a sliding column three, a pressure plate, a spring four, a sliding column four, an extrusion block and a mounting groove, the concave wheel is fixedly connected to the front end of the rotating shaft, the interior of the concave wheel is provided with evenly distributed mounting grooves, the front and rear inner walls of the mounting groove are rotatably connected with a pressure plate through a pin shaft, the left top of the pressure plate is fixedly connected with an extrusion block, the left and right sides of the bottom wall of the mounting groove are provided with sliding holes, the interiors of the two sliding holes located in the same mounting groove are slidably connected with sliding columns three and four respectively, the top of sliding column three is fixedly connected with a fixing plate, the bottom of the fixing plate and the bottom wall of the mounting groove are fixedly connected with a spring three, the spring three are all sleeved on the outer surface of sliding column three, the top of sliding column four is fixedly connected to the left bottom of the pressure plate, the left bottom of the pressure plate and the bottom wall of the mounting groove are fixedly connected with a spring four, the spring four are all sleeved on the outer surface of sliding column four, the reclining angle is adjusted.
[0010] Furthermore, the driving mechanism includes a button, a shell, a spring 1, a slide column 1, a slide column 2, a spring 2 and a pressure block. The shell is fixedly connected to the front side of the backrest, and the left side of the shell is slidably connected to the slide column 1, and the spring 1 is fixedly connected between the upper and lower inner walls on the left side of the shell. A set of springs is arranged on the outer surface of the slide column 1, and the bottom end of the slide column 1 is installed in cooperation with the top of the extrusion block. The right side of the shell is slidably connected to the inside, and the spring 2 is fixedly connected between the upper and lower inner walls on the right side of the shell. The spring 2 is set on the outer surface of the slide column 2, and the bottom end of the slide column 2 is fixedly connected to the pressure block. A slot is opened on the left side of the pressure block, and the slot is clamped with the top of the pressure plate. The tops of the slide column 1 and the slide column 2 are both fixedly connected to buttons to drive the adjustment angle.
[0011] Furthermore, the height adjustment mechanism includes a rotating cylinder, an internally threaded cylinder and a screw. The rotating cylinder is rotatably connected to the upper surface of the fixed seat through bearing 2. The interior of the rotating cylinder is slidably connected with the screw. The top end of the screw is rotatably connected to the bottom end of the fixed plate. The top end of the rotating cylinder is fixedly connected to the internally threaded cylinder. The external thread on the upper end of the screw is threadedly connected to the internal thread of the internally threaded cylinder, so as to facilitate the adjustment of the seat height.
[0012] Furthermore, the height adjustment mechanism also includes a fixed plate and a limiting column. The fixed plate is rotatably connected to the top outer surface of the rotating cylinder. The front and rear ends of the fixed plate are respectively slidably connected to the limiting column. The top of the limiting column is fixedly connected to the bottom end of the fixed plate to limit the position.
[0013] Furthermore, the height adjustment mechanism also includes a motor, a small bevel gear and a large bevel gear. The large bevel gear is fixedly sleeved on the outer surface of the bottom end of the rotating cylinder. The motor is installed on the upper surface of the front side of the mounting frame by bolts. The left end of the output shaft of the motor is fixedly connected with a small bevel gear. The small bevel gear is meshingly connected with the large bevel gear. The input end of the motor is electrically connected to the output end of the single-chip microcomputer to drive the height adjustment.
[0014] Compared with the prior art, the beneficial effects of the utility model are: the multi-angle adjustable office chair has the following advantages:
[0015] 1. When a person sits on the seat, the single-chip motor on the armrest is operated, and the output shaft of the motor drives the small bevel gear to rotate. The small bevel gear meshes and rotates with the large bevel gear through bearing 2. The rotation of the large bevel gear drives the rotating cylinder to rotate while driving the internal threaded cylinder, which is threadedly connected with the screw through the internal threaded cylinder, thereby driving the screw to slide upward, thereby lifting the fixed plate upward, and at the same time, the fixed plate drives the seat on the top of the fixed seat to rise upward, thereby achieving fully automatic height adjustment without cumbersome steps. When the height is too high, the single-chip motor on the armrest is controlled to operate in the opposite direction, and the output shaft of the motor drives the small bevel gear to rotate in the opposite direction. The small bevel gear meshes and rotates with the large bevel gear through bearing 2. The rotation of the large bevel gear drives the rotating cylinder to rotate in the opposite direction while driving the internal threaded cylinder, which is threadedly connected with the screw through the internal threaded cylinder, thereby driving the screw to slide downward, thereby lowering the fixed plate downward, and at the same time, the fixed plate drives the seat on the top of the fixed seat to drop downward, thereby achieving fully automatic height adjustment without cumbersome steps, and the height adjustment can be controlled with high precision.
[0016] 2. At the same time, the limiting columns on both sides of the fixed plate can achieve a limiting effect to prevent the fixed plate from rotating along with it during the rotation process. After the height is adjusted, the bearings between the fixed seat and the fixed plate can be used to rotate in any direction for easy work.
[0017] 3. When resting, lean back by your own gravity and press the button. The button drives the slide column 1 to expand and contract through the spring 1, and then the bottom end of the slide column 1 contacts the top of the extrusion block. The extrusion block is squeezed downward by the pressing force, and the left top of the pressure plate is squeezed by the extrusion block. At the same time, the bottom of the pressure plate squeezes the top slide column 4 downward, and then the slide column 4 is driven to slide downward through the slide hole through the expansion and contraction of the spring 4. At the same time, the pressure plate is tilted to one side through the pin shaft, so that the card slot of the pressure block at the bottom of the slide column 2 is separated from the top of the pressure plate, and then the slide column 2 is bounced upward by the force of the spring 2, and then the button is released, and the backrest is driven to lean back by its own gravity and then through The rotary shaft rotates, thereby driving the cam wheel to rotate. When leaning back to a suitable and comfortable angle, by pressing the button on the top of the slide column 2, the button drives the slide column 2 to expand and contract through the spring 2, and then the pressure block at the bottom of the slide column 2 is in contact with and squeezed with the fixed plate at the top of the slide column 3, so that the slide column 3 is driven downward through the sliding hole through the expansion and contraction of the spring 3. While sliding downward, the pressure block is in contact with and squeezed with the right side surface of the pressure plate, and the pressure plate is tilted to one side through the pin shaft. When it is tilted to a certain angle, the card slot inside the pressure block is engaged with the top right side of the pressure plate, thereby locking the rotation of the cam wheel. By adjusting the reclining angle of the office chair, the pressure on the neck and back can be relieved, and the body can be relaxed and fatigue can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 It is a schematic diagram of the structure of the utility model in cross section;
[0020] Figure 3 It is a schematic diagram of the structure of the utility model enlarged at A;
[0021] Figure 4 It is a schematic diagram of the structure enlarged at B of the utility model;
[0022] Figure 5 It is a schematic diagram of the structure enlarged at C of the utility model;
[0023] Figure 6 It is a partial structural schematic diagram of the height adjustment mechanism of the utility model.
[0024] In the figure: 1 driving mechanism, 101 button, 102 housing, 103 spring 1, 104 slide column 1, 105 slide column 2, 106 spring 2, 107 pressure block, 2 backrest, 3 angle adjustment mechanism, 31 concave wheel, 32 spring 3, 33 slide column 3, 34 pressure plate, 35 spring 4, 36 slide column 4, 37 extrusion block, 38 installation groove, 4 rotating shaft, 5 armrest, 6 single chip computer, 7 mounting frame, 8 universal wheel, 9 height adjustment mechanism, 91 motor, 92 small bevel gear, 93 large bevel gear, 94 rotating cylinder, 95 internal thread cylinder, 96 fixing plate, 97 screw, 98 limiting column, 10 fixing seat, 11 bearing 2, 12 seat, 13 bearing 1, 14 fixing plate. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1-6 , this embodiment provides a technical solution: a multi-angle adjustable office chair, including a rotating shaft 4, a seat 12 and a mounting frame 7;
[0027] Rotating shaft 4: Its front and rear ends are respectively rotatably connected with the bottom of a backrest 2, an angle adjustment mechanism 3 is provided at the front end of the rotating shaft 4, a driving mechanism 1 is provided on the front side of the backrest 2, the driving mechanism 1 is installed in cooperation with the angle adjustment mechanism 3, the angle adjustment mechanism 3 includes a concave wheel 31, a spring three 32, a sliding column three 33, a pressure plate 34, a spring four 35, a sliding column four 36, an extrusion block 37 and a mounting groove 38, the concave wheel 31 is fixedly connected to the front end of the rotating shaft 4, and evenly distributed mounting grooves 38 are opened inside the concave wheel 31, the front and rear inner walls of the mounting groove 38 are rotatably connected with the pressure plate 34 through a pin shaft, the left top of the pressure plate 34 is fixedly connected with the extrusion block 37, and the left and right sides of the bottom wall of the mounting groove 38 are provided with sliding holes, which are located in the same mounting groove 38 The insides of the two sliding holes are slidably connected with sliding column three 33 and sliding column four 36 respectively, the top of sliding column three 33 is fixedly connected with a fixing plate, the bottom of the fixing plate is fixedly connected with a spring three 32 between the bottom of the fixing plate and the bottom wall of the mounting groove 38, and the springs three 32 are all sleeved on the outer surface of sliding column three 33, the top of sliding column four 36 is fixedly connected with the left bottom of the pressure plate 34, and the left bottom of the pressure plate 34 is fixedly connected with a spring four 35 between the bottom of the left side of the pressure plate 34 and the bottom wall of the mounting groove 38, and the springs four 35 are all sleeved on the outer surface of sliding column four 36. The driving mechanism 1 includes a button 101, a shell 102, a spring one 103, a sliding column one 104, a sliding column two 105, a spring two 106 and a pressing block 107. The shell 102 is fixedly connected to the front side of the backrest 2, and the left side of the shell 102 is slidably connected with Sliding column 104, a spring 103 is fixedly connected between the upper and lower inner walls on the left side of the shell 102, the spring 103 is sleeved on the outer surface of the sliding column 104, the bottom end of the sliding column 104 is installed in cooperation with the top of the extrusion block 37, and a sliding column 105 is slidably connected to the right side of the shell 102, and a spring 106 is fixedly connected between the upper and lower inner walls on the right side of the shell 102, the spring 106 is sleeved on the outer surface of the sliding column 105, and the bottom end of the sliding column 105 is fixedly connected to a pressure block 107, and a card slot is provided on the left side of the pressure block 107, and the card slot is engaged with the top of the pressure plate 34, and the tops of the sliding columns 104 and the sliding columns 105 are fixedly connected with buttons 101, and at the same time, the limiting effect is achieved through the limit columns 98 on both sides of the fixing plate 96. , to prevent the fixed plate 14 from rotating together during the rotation process. After the height is adjusted, the bearing 2 11 between the fixed seat 10 and the fixed plate 14 can be rotated 360 degrees in any direction for easy work. When resting, lean back by your own gravity, and press the button 101. The button 101 drives the slide column 104 through the expansion and contraction of the spring 103, and then the bottom end of the slide column 104 contacts the top of the extrusion block 37. The extrusion block 37 is squeezed downward by the pressing force, and the left top of the pressure plate 34 is squeezed by the extrusion block 37. At the same time, the top slide column 4 36 of the bottom of the pressure plate 34 is squeezed downward, and then the slide column 4 36 is driven to slide downward through the slide hole through the expansion and contraction of the spring 4 35. At the same time, the pressure plate 34 is tilted to one side through the pin axis.Thereby, the slot of the pressing block 107 at the bottom of the second sliding column 105 is separated from the top of the pressure plate 34, and then the second sliding column 105 is bounced upward by the force of the second spring 106, and then the button 101 is released, and the backrest 2 is driven to rotate through the rotating shaft 4 by its own gravity, thereby driving the cam wheel 31 to rotate. When the backrest is reclined to a suitable and comfortable angle, the button 101 on the top of the second sliding column 105 is pressed, and the button 101 drives the second sliding column 105 to expand and contract through the second spring 106, thereby expanding the bottom of the second sliding column 105 The pressing block 107 at the end contacts and squeezes with the fixed sheet at the top of the sliding column 33, so that the sliding column 33 is driven to slide downward through the sliding hole through the expansion and contraction of the spring 32. While sliding downward, the pressing block 107 contacts and squeezes with the right side of the pressing plate 34, and the pressing plate 34 is tilted to one side through the pin shaft. When it is tilted to a certain angle, the card slot inside the pressing block 107 is engaged with the right top of the pressing plate 34, thereby locking the rotation of the concave wheel 3. By adjusting the reclining angle of the office chair, the pressure on the neck and back can be relieved, so that the body can be relaxed and fatigue can be reduced;
[0028] Seat 12: It is fixedly connected to the middle of the rotating shaft 4, and the front and rear sides of the seat 12 are respectively installed with armrests 5 by bolts, and also includes a single-chip microcomputer 6, which is arranged on the upper surface of the front armrest 5, and the input end of the single-chip microcomputer 6 is electrically connected to an external power supply. The bottom of the seat 12 is rotatably connected to a fixed plate 14 through a bearing 13, and a height adjustment mechanism 9 is provided at the bottom of the fixed plate 14;
[0029] The mounting frame 7 is located at the bottom of the seat 12. The middle part of the mounting frame 7 is fixedly connected with a fixed seat 10. The upper surface of the fixed seat 10 is rotatably connected to the bottom of the height adjustment mechanism 9 through a bearing 11. The bottom of the mounting frame 7 is provided with uniformly distributed universal wheels 8. The height adjustment mechanism 9 includes a rotating cylinder 94, an internally threaded cylinder 95 and a screw 97. The rotating cylinder 94 is rotatably connected to the upper surface of the fixed seat 10 through the bearing 11. The interior of the rotating cylinder 94 is slidably connected with a screw 97. The top end of the screw 97 is rotatably connected to the bottom end of the fixed plate 14. The top end of the rotating cylinder 94 is fixedly connected with an internally threaded cylinder 95. The external thread on the upper end of the screw 97 is connected to the internally threaded cylinder 95 is threadedly connected with the internal thread of the height adjustment mechanism 9, and the height adjustment mechanism 9 also includes a fixed plate 96 and a limit column 98. The fixed plate 96 is rotatably connected to the top outer surface of the rotating cylinder 94, and the front and rear ends of the fixed plate 96 are respectively slidably connected to the limit column 98. The top of the limit column 98 is fixedly connected to the bottom end of the fixed plate 14. The height adjustment mechanism 9 also includes a motor 91, a small bevel gear 92 and a large bevel gear 93. The large bevel gear 93 is fixedly sleeved on the outer surface of the bottom end of the rotating cylinder 94. The motor 91 is installed on the upper surface of the front side of the mounting frame 7 by bolts. The left end of the output shaft of the motor 91 is fixedly connected with the small bevel gear 92, and the small bevel gear 92 is meshed with the large bevel gear 93. The input end of the motor 91 is electrically connected to the output end of the single-chip microcomputer 6. When a person sits on the seat 12, the single-chip microcomputer 6 on the armrest 5 controls the operation of the motor 91. The output shaft of the motor 91 drives the small bevel gear 92 to rotate. The small bevel gear 92 meshes and rotates with the large bevel gear 93 through the bearing 11. The rotation of the large bevel gear 93 drives the rotating cylinder 94 to rotate while driving the internal thread cylinder 95. The internal thread cylinder 95 is threadedly connected with the screw 97, and then drives the screw 97 to slide upward, thereby lifting the fixed plate 14 upward. At the same time, the fixed plate 14 drives the seat 12 on the top of the fixed seat 10 to rise upward, thereby achieving fully automatic height adjustment without the need for cumbersome steps. Step 1, when the height is too high, the single-chip microcomputer 6 on the armrest 5 controls the motor 91 to run in the opposite direction, and the output shaft of the motor 91 drives the small bevel gear 92 to rotate in the opposite direction, and the small bevel gear 92 meshes and rotates with the large bevel gear 93 through the bearing 11. The rotation of the large bevel gear 93 drives the rotating cylinder 94 to rotate in the opposite direction while driving the internal threaded cylinder 95, which is threadedly connected with the screw 97 through the internal threaded cylinder 95, and then drives the screw 97 to slide downward, thereby dropping the fixed plate 14 downward, and at the same time, the fixed plate 14 drives the seat 12 on the top of the fixed seat 10 to drop downward, thereby achieving fully automated height adjustment, without the need for cumbersome steps, and the height adjustment can be controlled with high precision.
[0030] The working principle of the multi-angle adjustable office chair provided by the utility model is as follows: when a person sits on the seat 12, the single-chip microcomputer 6 on the armrest 5 controls the operation of the motor 91, and the output shaft of the motor 91 drives the small bevel gear 92 to rotate, and the small bevel gear 92 meshes and rotates with the large bevel gear 93 through the bearing 11, and the large bevel gear 93 rotates to drive the rotating cylinder 94 to rotate while driving the internal thread cylinder 95, which is threadedly connected with the screw 97 through the internal thread cylinder 95, and then drives the screw 97 to slide upward, thereby lifting the fixed plate 14 upward, and at the same time, the fixed plate 14 drives the seat 12 on the top of the fixed seat 10 to rise upward, thereby achieving fully automated height adjustment without complicated steps. When the height is too high, the single-chip microcomputer 6 on the armrest 5 controls the motor 91 to move in the opposite direction. The output shaft of the motor 91 drives the small bevel gear 92 to rotate in the opposite direction, and the small bevel gear 92 meshes and rotates with the large bevel gear 93 through the bearing 2 11. The rotation of the large bevel gear 93 drives the rotating cylinder 94 to rotate in the opposite direction while driving the internal thread cylinder 95, which is threadedly connected with the screw 97 through the internal thread cylinder 95, and then drives the screw 97 to slide downward, so that the fixed plate 14 drops downward. At the same time, the fixed plate 14 drives the seat 12 on the top of the fixed seat 10 to drop downward, so as to achieve fully automatic height adjustment without complicated steps, and the height adjustment can be controlled with high precision. At the same time, the limiting columns 98 on both sides of the fixing plate 96 are used to limit the effect, so as to prevent the fixed plate 14 from rotating together during the rotation process. After the height adjustment is completed, the fixing seat 10 and the fixing seat 10 can be used to adjust the height. The bearing 11 between the fixed disks 14 can rotate 360 degrees in any direction for easy work. When resting, the user can lean back by his own gravity. By pressing the button 101, the button 101 drives the slide column 104 to expand and contract the spring 103, and then the bottom end of the slide column 104 contacts the top of the extrusion block 37. The extrusion block 37 is pressed downward by the pressing force, and the top left side of the pressure plate 34 is squeezed by the extrusion block 37. At the same time, the bottom of the pressure plate 34 squeezes the top slide column 4 36 downward, and then the slide column 4 36 is driven to slide downward through the slide hole through the expansion and contraction of the spring 4 35. At the same time, the pressure plate 34 is tilted to one side through the pin shaft, so that the slot of the pressure block 107 at the bottom of the slide column 105 is separated from the top of the pressure plate 34, and then the slide column 105 is pressed downward. 05 Through the force of the second spring 106, the second slide column 105 is bounced upward, and then the button 101 is released, and the backrest 2 is driven to lean back through its own gravity, and then the rotating shaft 4 is rotated, thereby driving the cam wheel 31 to rotate. When leaning back to a suitable and comfortable angle, by pressing the button 101 on the top of the second slide column 105, the button 101 drives the second slide column 105 through the expansion and contraction of the second spring 106, and then the pressure block 107 at the bottom of the second slide column 105 is contacted and squeezed with the fixed plate at the top of the third slide column 33, so that the expansion and contraction of the spring third 32 drives the third slide column 33 to slide downward through the sliding hole. While sliding downward, the pressure block 107 is in contact and squeezed with the right side surface of the pressure plate 34, and the pressure plate 34 is tilted to one side through the pin shaft. When it tilts to a certain angle,The slot inside the pressing block 107 is engaged with the top right side of the pressing plate 34, thereby locking the rotation of the concave wheel 3. By adjusting the reclining angle of the office chair, the pressure on the neck and back can be relieved, so that the body can be relaxed and fatigue can be reduced.
[0031] It is worth noting that the specific model of the single chip microcomputer 6 disclosed in the above embodiment is S7-200, and the motor 91 can be selected as D180M-0160030B-E. The single chip microcomputer 6 controls the operation of the motor 91 using a method commonly used in the prior art.
[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. Multi-angle adjustable office chair, characterized by: It comprises a rotating shaft (4), a seat (12) and a mounting frame (7); A rotating shaft (4): the front and rear ends of the rotating shaft (4) are respectively rotatably connected to the bottom of a backrest (2); the front end of the rotating shaft (4) is provided with an angle adjustment mechanism (3); the front side of the backrest (2) is provided with a driving mechanism (1); the driving mechanism (1) and the angle adjustment mechanism (3) are installed in coordination; The seat (12) is fixedly connected to the middle of the rotating shaft (4). The front and rear sides of the seat (12) are respectively equipped with armrests (5) by bolts. The bottom of the seat (12) is rotatably connected to a fixed plate (14) by a bearing (13). The bottom of the fixed plate (14) is provided with a height adjustment mechanism (9). The mounting frame (7) is located at the bottom of the seat (12). A fixing seat (10) is fixedly connected to the middle of the mounting frame (7). The upper surface of the fixing seat (10) is rotatably connected to the bottom of the height adjustment mechanism (9) via a second bearing (11). The bottom of the mounting frame (7) is provided with uniformly distributed universal wheels (8).
2. The multi-angle adjustable office chair according to claim 1, characterized in that: It also includes a single chip microcomputer (6), which is arranged on the upper surface of the front armrest (5), and the input end of the single chip microcomputer (6) is electrically connected to an external power supply.
3. The multi-angle adjustable office chair according to claim 1, characterized in that: The angle adjustment mechanism (3) comprises a cam (31), a spring three (32), a slide column three (33), a pressure plate (34), a spring four (35), a slide column four (36), an extrusion block (37) and a mounting groove (38). The cam (31) is fixedly connected to the front end of the rotating shaft (4). The interior of the cam (31) is provided with evenly distributed mounting grooves (38). The front and rear inner walls of the mounting groove (38) are rotatably connected with the pressure plate (34) via a pin shaft. The left top of the pressure plate (34) is fixedly connected with the extrusion block (37). The left and right sides of the bottom wall of the mounting groove (38) are provided with sliding holes. A sliding column three (33) and a sliding column four (36) are slidably connected to the inside of the two sliding holes in the same mounting groove (38), respectively; a fixing plate is fixedly connected to the top of the sliding column three (33); a spring three (32) is fixedly connected between the bottom of the fixing plate and the bottom wall of the mounting groove (38); the springs three (32) are sleeved on the outer surface of the sliding column three (33); the top of the sliding column four (36) is fixedly connected to the left bottom of the pressure plate (34); a spring four (35) is fixedly connected between the left bottom of the pressure plate (34) and the bottom wall of the mounting groove (38); the springs four (35) are sleeved on the outer surface of the sliding column four (36).
4. The multi-angle adjustable office chair according to claim 3, characterized in that: The driving mechanism (1) comprises a button (101), a housing (102), a spring 1 (103), a sliding column 1 (104), a sliding column 2 (105), a spring 2 (106) and a pressure block (107); the housing (102) is fixedly connected to the front side of the backrest (2); the sliding column 1 (104) is slidably connected to the left side of the housing (102); the spring 1 (103) is fixedly connected between the upper and lower inner walls on the left side of the housing (102); the spring 1 (103) is sleeved on the outer surface of the sliding column 1 (104); the bottom end of the sliding column 1 (104) is slidably connected to the left side of the housing (102); The top end of the extrusion block (37) is cooperatively installed, and a second slide column (105) is slidably connected to the inside of the right side of the shell (102), and a second spring (106) is fixedly connected between the upper and lower inner walls on the right side of the shell (102). The second spring (106) is sleeved on the outer surface of the second slide column (105). The bottom end of the second slide column (105) is fixedly connected to a pressure block (107). A slot is provided on the left side of the pressure block (107), and the slot is engaged with the top end of the pressure plate (34). The top ends of the first slide column (104) and the second slide column (105) are fixedly connected to buttons (101).
5. The multi-angle adjustable office chair according to claim 2, characterized in that: The height adjustment mechanism (9) comprises a rotating cylinder (94), an internally threaded cylinder (95) and a screw (97); the rotating cylinder (94) is rotatably connected to the upper surface of the fixed seat (10) via a second bearing (11); the interior of the rotating cylinder (94) is slidably connected with the screw (97); the top end of the screw (97) is rotatably connected to the bottom end of the fixed plate (14); the top end of the rotating cylinder (94) is fixedly connected to the internally threaded cylinder (95); the external thread at the upper end of the screw (97) is threadedly connected to the internal thread of the internally threaded cylinder (95).
6. The multi-angle adjustable office chair according to claim 5, characterized in that: The height adjustment mechanism (9) further comprises a fixing plate (96) and a limiting column (98), wherein the fixing plate (96) is rotatably connected to the outer surface of the top end of the rotating cylinder (94), the front and rear ends of the fixing plate (96) are respectively slidably connected to the limiting column (98), and the top end of the limiting column (98) is fixedly connected to the bottom end of the fixing plate (14).
7. The multi-angle adjustable office chair according to claim 5, characterized in that: The height adjustment mechanism (9) further comprises a motor (91), a small bevel gear (92) and a large bevel gear (93); the large bevel gear (93) is fixedly sleeved on the outer surface of the bottom end of the rotating cylinder (94); the motor (91) is mounted on the upper surface of the front side of the mounting frame (7) by means of bolts; the left end of the output shaft of the motor (91) is fixedly connected with the small bevel gear (92); the small bevel gear (92) is meshedly connected with the large bevel gear (93); and the input end of the motor (91) is electrically connected to the output end of the single chip computer (6).