Office chair with adjustable backrest angle
By designing a mechanism that can adjust the angle of the backrest on the office chair, using the combination of steel rope and pulleys, the problem of the angle of the backrest of the existing office chair cannot be adjusted, achieving higher comfort and adaptability, and further improving the use experience of the chair through the ventilation mechanism.
Patent Information
- Application Number
- CN202422594966.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-10-28
AI Technical Summary
The backrest angle of the existing office chair cannot be effectively adjusted, which causes users to feel fatigue and discomfort after long-term use. Especially for those who maintain a posture for a long time, a fixed office chair will have adverse effects on the body.
An office chair with adjustable backrest angle is designed. By setting adjustment grooves and fixing pins on the armrests, the angle adjustment of the seat back is achieved using a combination of steel ropes and pulleys, and a ventilation mechanism is provided at the bottom of the chair to improve comfort.
The adjustable function of the seat back angle is realized, which meets users' diverse needs for the back angle, reduces the fatigue of users when sitting for a long time, and improves the comfort of the office chair through good ventilation.
Smart Images
Figure CN222929463U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of office chairs, in particular to an office chair with an adjustable backrest angle. Background Art
[0002] An office chair is an important piece of office furniture that greatly improves the comfort and efficiency of people at work. It can provide good support for users. The shape and size of the seat are carefully designed to adapt to the body shapes of different users, and can provide effective support for the user's waist, back and neck, relieve the pressure on the spine, and ensure that users do not feel fatigued after sitting for a long time.
[0003] As people's working hours continue to extend, the requirements for the comfort of office chairs are getting higher and higher. Therefore, office chairs with adjustable backrest angles are produced, which can adjust the angle of the backrest according to the needs and usage scenarios of different users, so as to provide more comfortable support for users, thereby improving the versatility and practicality of office chairs.
[0004] In the manufacturing process of existing office chairs, in order to save costs, the office chairs are non-adjustable or have a very small adjustable angle range, which cannot meet the user's needs for backrest angle adjustment. Due to the relatively fixed backrest angle, users are prone to fatigue and discomfort after long-term use. Especially for those who need to work in a fixed posture for a long time, fixed office chairs will have an adverse impact on their bodies. Summary of the Utility Model
[0005] In order to make up for the above deficiencies, the utility model provides an office chair with an adjustable backrest angle, aiming to improve the problem that office chairs that are non-adjustable or have a very small adjustable angle range cannot meet the user's needs for backrest angle adjustment. Due to the relatively fixed backrest angle, users are prone to fatigue and discomfort after long-term use. Especially for those who need to work in a fixed posture for a long time, fixed office chairs will have an adverse impact on their bodies.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme: An office chair with an adjustable backrest angle includes a seat cushion. A rotating shaft is fixedly connected to the rear side of the seat cushion. A seat backrest is fixedly connected to the top of the rotating shaft. A base is fixedly connected to the bottom of the seat cushion. Armrests are fixedly connected to the left and right sides of the seat cushion. Adjustment grooves are formed in the top walls of the two armrests. Fixed pins are arranged on the inner walls of the two adjustment grooves. Steel ropes are fixedly connected to the bottom ends of the two fixed pins. Pulleys are rotatably connected to the rear sides of the two armrests. Fixed columns are fixedly connected to the middle parts of the left and right sides of the two seat backrests. The two steel ropes respectively penetrate through the interiors of the armrests and are fixedly connected to the outer walls of the two fixed columns. A ventilation mechanism is arranged on the left side of the bottom wall of the seat cushion.
[0007] As a further description of the above technical solution:
[0008] The ventilation mechanism includes a main power supply. An air inlet hole is formed in the rear side of the bottom wall of the seat cushion. An air intake fan is fixedly understood on the inner wall of the air inlet hole. A ventilation pipe is communicated with the top of the inner wall of the air inlet hole. A plurality of shunt pipes are communicated with the left and right sides of the outer wall of the ventilation pipe. A plurality of air outlet holes are formed in the tops of the plurality of shunt pipes. A plurality of ventilation grooves are formed at equal intervals on the top wall of the seat cushion. The plurality of ventilation grooves are respectively communicated with the plurality of air outlet holes.
[0009] As a further description of the above technical solution:
[0010] A plurality of universal wheels are rotatably connected to the bottom of the base at equal intervals. The outer walls of the plurality of universal wheels are rubber layers.
[0011] As a further description of the above technical solution:
[0012] A control board is fixedly connected to the inner bottom wall of the left armrest. A control button is fixedly connected to the rear side of the top wall of the control board.
[0013] As a further description of the above technical solution:
[0014] A charging port is arranged on the front side of the top wall of the control board. The charging port is electrically connected to the main power supply.
[0015] As a further description of the above technical solution:
[0016] Hinge shafts are fixedly connected to the top ends of the two armrests on the far away sides. Covers are fixedly connected to the tops of the two hinge shafts. A plurality of fitting holes are formed on the left and right sides of the two covers. The plurality of fitting holes are engaged with the fixed bolts.
[0017] As a further description of the above technical solution:
[0018] A damping regulating valve is arranged on the left side of the rotating shaft. The damping regulating valve is used for regulating the tension degree of the rotating shaft.
[0019] As a further description of the above technical solution:
[0020] A secondary power supply is fixedly connected to the right side of the bottom wall of the seat cushion. The secondary power supply is electrically connected to the main power supply.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the present utility model, by inserting the fixed bolt into different adjustment slots, the steel cable is tightened. The steel cable transfers the pulling force to the fixed column through the guiding action of the pulley, and the fixed column drives the seat back to maintain at the adjusted angular position, realizing the adjustable function of the seat back angle.
[0023] 2. In the present utility model, the intake fan sucks the external air through the air inlet holes and into the ventilation pipe, and then the air is split into multiple split pipes on the left and right sides. The air outlet holes 206 opened at the tops of the multiple split pipes blow the air upward through multiple ventilation slots, providing a good ventilation effect for the user, reducing the stuffiness caused by sitting for a long time, and improving the comfort of the office chair. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a perspective view of the office chair with an adjustable backrest angle proposed by the present utility model;
[0025] Figure 2 is a side view of the office chair with an adjustable backrest angle proposed by the present utility model;
[0026] Figure 3 is a schematic structural view of the adjustment slot of the office chair with an adjustable backrest angle proposed by the present utility model;
[0027] Figure 4 is a bottom view of the seat cushion of the office chair with an adjustable backrest angle proposed by the present utility model;
[0028] Figure 5 is a schematic structural view of the ventilation pipe of the office chair with an adjustable backrest angle proposed by the present utility model.
[0029] LEGEND DESCRIPTION:
[0030] 1. Seat cushion; 2. Ventilation mechanism; 201. Main power supply; 202. Air inlet holes; 203. Intake fan; 204. Ventilation pipe; 205. Split pipe; 206. Air outlet holes; 207. Ventilation slots; 3. Rotating shaft; 4. Seat back; 5. Base; 6. Armrest; 7. Adjustment slot; 8. Fixed bolt; 9. Steel cable; 10. Pulley; 11. Fixed column; 12. Universal wheel; 13. Control panel; 14. Control button; 15. Charging port; 16. Hinge shaft; 17. Cover plate; 18. Fitting hole; 19. Damping regulating valve; 20. Sub-power supply. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0032] Referring to Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: an office chair with an adjustable backrest angle, including a seat cushion 1. A rotating shaft 3 is fixedly connected to the rear side of the seat cushion 1. A seat backrest 4 is fixedly connected to the top of the rotating shaft 3. A base 5 is fixedly connected to the bottom of the seat cushion 1. Armrests 6 are fixedly connected to the left and right sides of the seat cushion 1. Adjustment grooves 7 are provided on the top walls of the two armrests 6. Fixed pins 8 are provided on the inner walls of the two adjustment grooves 7. Steel ropes 9 are fixedly connected to the bottom ends of the two fixed pins 8. Pulleys 10 are rotatably connected to the rear sides of the two armrests 6. Fixed columns 11 are fixedly connected to the middle parts of the left and right sides of the two seat backrests 4. The two steel ropes 9 respectively pass through the interiors of the armrests 6 and are fixedly connected to the outer walls of the two fixed columns 11. A ventilation mechanism 2 is provided on the left side of the bottom wall of the seat cushion 1;
[0033] Specifically, when it is necessary to adjust the angle of the seat backrest 4, the user operates the components on the armrest 6 to achieve it. The fixed pin 8 is provided in the adjustment groove 7 on the top wall of the armrest 6. The bottom end of the fixed pin 8 is connected to the steel rope 9. The steel rope 9 passes through the interior of the armrest 6 and changes its direction through the pulley 10 at the rear side of the armrest 6. The fixed column 11 in the middle of the left and right sides of the seat backrest 4 is connected to the steel rope 9. When the user pulls up the fixed pin 8, the fixed pin 8 is pulled out from the adjustment groove 7. At this time, the steel rope 9 is in a slack state. The user can adjust the angle of the seat backrest 4 according to his own needs. The seat backrest 4 rotates through the rotating shaft 3. After adjusting to the appropriate angle, the fixed pin 8 is reinserted into a new appropriate adjustment groove 7, so as to tighten the steel rope 9. The steel rope 9 transmits the pulling force to the fixed column 11 through the guiding action of the pulley 10. The fixed column 11 drives the seat backrest 4 to maintain the adjusted angle position, realizing the adjustable function of the angle of the seat backrest 4. The base 5 plays a role in supporting the entire office chair to ensure the stability of the office chair.
[0034] Referring to Figure 1 , Figure 4 and Figure 5, the ventilation mechanism 2 includes a main power supply 201. An air inlet hole 202 is provided at the rear side of the bottom wall of the seat cushion 1. An air intake fan 203 is fixedly understood on the inner wall of the air inlet hole 202. A ventilation pipe 204 is communicated with the top of the inner wall of the air inlet hole 202. A plurality of shunt pipes 205 are communicated with the left and right sides of the outer wall of the ventilation pipe 204. A plurality of air outlet holes 206 are provided at the top of the plurality of shunt pipes 205. A plurality of ventilation grooves 207 are equidistantly provided on the top wall of the seat cushion 1. The plurality of ventilation grooves 207 are respectively communicated with the plurality of air outlet holes 206;
[0035] Specifically, when ventilation is required for the office chair, the main power supply 201 supplies power to the air intake fan 203, causing the air intake fan 203 to start working. External air is inhaled through the air inlet hole 202 at the rear side of the bottom wall of the seat cushion 1. After being inhaled, the air enters the ventilation pipe 204. The ventilation pipe 204 serves to convey the air. The air is shunted from the ventilation pipe 204 into a plurality of shunt pipes 205 on the left and right sides. The shunt pipes 205 further disperse the air. The air outlet holes 206 provided at the top of the plurality of shunt pipes 205 discharge the air. The discharged air is blown upward through a plurality of ventilation grooves 207 equidistantly provided on the top wall of the seat cushion 1. In this way, air can continuously enter from the bottom, pass through a series of channels, and be blown out from the top of the seat cushion 1, providing a good ventilation effect for the user, reducing the sultriness caused by long sitting, and improving the comfort of the office chair.
[0036] Refer to Figure 1 and Figure 2 , a plurality of universal wheels 12 are rotatably connected to the bottom of the base 5 at equal intervals. The outer walls of the plurality of universal wheels 12 are rubber layers; a control board 13 is fixedly connected to the inner bottom wall of the left armrest 6. A control button 14 is fixedly connected to the rear side of the top wall of the control board 13; a charging port 15 is provided on the front side of the top wall of the control board 13. The charging port 15 is electrically connected to the main power supply 201;
[0037] Specifically, the universal wheels 12 enable the office chair to move flexibly, facilitating the user to adjust the position. The rubber layer can play a role in shock absorption and noise reduction, while increasing the friction with the ground and improving stability. The control board 13 serves as the control center. The control button 14 on its top is used to start and close the ventilation function of the office chair, providing a convenient operation method for the user. The charging port 15 charges the main power supply 201 of the office chair to ensure the continuous normal operation of various electric functions of the office chair.
[0038] Refer to Figure 2 、 Figure 3 and Figure 4, hinge shafts 16 are fixedly connected to the tops of the two armrests 6 on the sides away from each other. Covers 17 are fixedly connected to the tops of the two hinge shafts 16. A plurality of fitting holes 18 are formed on the left and right sides of the two covers 17. All the plurality of fitting holes 18 are engaged with the fixed pins 8; a damping adjusting valve 19 is arranged on the left side of the rotating shaft 3. The damping adjusting valve 19 is used to adjust the tension degree of the rotating shaft 3; a secondary power source 20 is fixedly connected to the right side of the bottom wall of the seat cushion 1. The secondary power source 20 is electrically connected to the main power source 201;
[0039] Specifically, the cover 17 can be opened and closed through the hinge shaft 16. When the seat is in normal use, the cover 17 can be closed. The fitting holes 18 are engaged with the fixed pins 8, which plays a role in fixing the fixed pins 8 and keeps the surface of the armrest 6 flat at the same time. The damping adjusting valve 19 is used to adjust the tension degree of the rotating shaft 3, so as to adjust the resistance when the seat backrest 4 rotates. The secondary power source 20 is used as a backup power source for the main power source 201. When the power of the main power source 201 is insufficient or a fault occurs, the secondary power source 20 can continue to provide power for the key functions of the office chair to ensure that the basic use functions of the office chair are not affected.
[0040] Working principle: When the user needs to adjust the angle of the seat backrest 4, the user operates the components on the armrest 6 to achieve it. A fixed pin 8 is arranged in the adjustment groove 7 on the top wall of the armrest 6. The bottom end of the fixed pin 8 is connected to a steel cable 9. The steel cable 9 passes through the inside of the armrest 6 and changes direction through a pulley 10 at the rear side of the armrest 6. The fixed columns 11 in the middle of the left and right sides of the seat backrest 4 are connected to the steel cable 9. When the user pulls up the fixed pin 8, the fixed pin 8 is pulled out of the adjustment groove 7. At this time, the steel cable 9 is in a slack state. The user can adjust the angle of the seat backrest 4 according to his own needs. The seat backrest 4 rotates through the rotating shaft 3. After adjusting to the appropriate angle, the fixed pin 8 is inserted into a new appropriate adjustment groove 7 again, so as to tighten the steel cable 9. The steel cable 9 transmits the pulling force to the fixed column 11 through the guiding action of the pulley 10, and the fixed column 11 drives the seat backrest 4 to maintain the adjusted angle position;
[0041] Moreover, when ventilation is required for the office chair, the main power source 201 supplies power to the intake fan 203, so that the intake fan 203 starts to work. External air is inhaled through the air intake holes 202 at the rear side of the bottom wall of the seat cushion 1. After being inhaled, the air enters the ventilation pipe 204. The ventilation pipe 204 plays a role in conveying air. The air is diverted from the ventilation pipe 204 into a plurality of shunt pipes 205 on the left and right sides. The shunt pipes 205 further disperse the air. The air outlet holes 206 formed at the tops of the plurality of shunt pipes 205 discharge the air. These discharged airs are blown upward through a plurality of ventilation slots 207 equidistantly arranged on the top wall of the seat cushion 1. In this way, the air can continuously enter from the bottom and be blown out from the top of the seat cushion 1 after passing through a series of channels, providing a good ventilation effect for the user and reducing the sultriness caused by sitting for a long time.
[0042] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An office chair with an adjustable backrest angle, comprising a seat cushion (1), characterized in that: The rear side of the seat cushion (1) is fixedly connected to a rotating shaft (3), the top of the rotating shaft (3) is fixedly connected to a seat back (4), the bottom of the seat cushion (1) is fixedly connected to a base (5), the left and right sides of the seat cushion (1) are fixedly connected to armrests (6), the top walls of the two armrests (6) are each provided with an adjustment slot (7), the inner walls of the two adjustment slots (7) are each provided with a fixing pin (8), the bottom ends of the two fixing pins (8) are each fixedly connected to a steel rope (9), the rear sides of the two armrests (6) are rotatably connected to pulleys (10), the middle portions of the left and right sides of the two seat backs (4) are fixedly connected to fixing columns (11), the two steel ropes (9) respectively penetrate the interior of the armrests (6) and are fixedly connected to the outer walls of the two fixing columns (11), and a ventilation mechanism (2) is provided on the left side of the bottom wall of the seat cushion (1).
2. The office chair with adjustable backrest angle according to claim 1, characterized in that: The ventilation mechanism (2) comprises a main power supply (201); an air inlet (202) is provided on the rear side of the bottom wall of the seat cushion (1); an air inlet fan (203) is fixedly arranged on the inner wall of the air inlet (202); a ventilation pipe (204) is connected to the top of the inner wall of the air inlet (202); a plurality of shunt pipes (205) are connected to the left and right sides of the outer wall of the ventilation pipe (204); a plurality of air outlet holes (206) are provided on the top of the plurality of shunt pipes (205); and a plurality of ventilation slots (207) are equidistantly provided on the top wall of the seat cushion (1); the plurality of ventilation slots (207) are respectively connected to the plurality of air outlet holes (206).
3. The office chair with adjustable backrest angle according to claim 1, characterized in that: The bottom of the base (5) is rotatably connected to a plurality of universal wheels (12) at equal intervals, and the outer walls of the plurality of universal wheels (12) are all rubber layers.
4. The office chair with adjustable backrest angle according to claim 1, characterized in that: A control panel (13) is fixedly connected to the inner bottom wall of the left handrail (6), and a control button (14) is fixedly connected to the rear side of the top wall of the control panel (13).
5. The office chair with adjustable backrest angle according to claim 4, characterized in that: A charging port (15) is provided on the front side of the top wall of the control panel (13), and the charging port (15) is electrically connected to the main power supply (201).
6. The office chair with adjustable backrest angle according to claim 1, characterized in that: The top ends of the two armrests (6) on the sides away from each other are fixedly connected to hinge shafts (16), the top ends of the two hinge shafts (16) are fixedly connected to cover plates (17), and the left and right sides of the two cover plates (17) are provided with a plurality of fitting holes (18), and the plurality of fitting holes (18) are mutually meshed with the fixing pins (8).
7. The office chair with adjustable backrest angle according to claim 1, characterized in that: A damping regulating valve (19) is provided on the left side of the rotating shaft (3), and the damping regulating valve (19) is used to adjust the tension of the rotating shaft (3).
8. The office chair with adjustable backrest angle according to claim 1, characterized in that: A secondary power supply (20) is fixedly connected to the right side of the bottom wall of the seat cushion (1), and the secondary power supply (20) is electrically connected to the main power supply (201).