Surgical lift chair

Abstract

The application discloses a surgical lifting chair and relates to the field of surgical auxiliary equipment.The surgical lifting chair comprises a base, a universal wheel group arranged on the bottom surface of the base, a moving locking assembly arranged on the two sides of the base and used for locking the position of the base, a first air pressure rod arranged in the middle of the base, and a first foot switch arranged on the base and used for controlling the first air pressure rod.The bottom end of the first foot switch is located in the base, a lifting control rod is arranged in the base, a lifting control shaft with an axis in the horizontal direction is arranged in the middle of the lifting control rod, and one end of the lifting control rod is in abutment with the bottom end of the first foot switch.The second air pressure rod is controlled through an elbow switch, so that the position of a backrest is adjusted to enable deep sitting adjustment.The height of a seat plate base and the seat plate is adjusted through the first foot switch controlling the first air pressure rod.The whole adjustment process is completed through the feet or elbows of a main surgeon, and the main surgeon can complete the adjustment according to his / her own feeling.

Description

Technical Field

[0001] This invention relates to the field of surgical aids, and more specifically to a surgical lifting chair. Background Technology

[0002] Many modern surgical procedures require delicate manipulation and are lengthy, necessitating easily controllable, comfortable, and stable chairs. Existing chairs often only allow adjustment of the seat height based on the surgeon's height, lacking other adjustments such as footrests and backrests. However, surgeons vary in height, build, and posture, and may require different seat depths and footrest heights for different surgeries. Currently, seat height and depth adjustments are often made manually. However, to ensure aseptic technique during surgery, the surgeon cannot touch any instruments other than surgical tools. Therefore, most current adjustments are made by assistants, which is cumbersome, inefficient, and difficult for others to accurately adjust to the appropriate position, increasing the assistant's workload. For some major surgeries that require the use of multiple surgical instruments, the area around the surgeon's position is often cluttered with the pedals and switches for various surgical equipment. Furthermore, each pedal switch is connected to its corresponding device via electrical wires, making the area around the surgeon extremely cluttered and hindering the surgeon's movement. Moreover, due to the overlapping and intertwined pedals, the surgeon must bend down to find the switch each time they need to use the appropriate device. Despite this, it is not uncommon for the surgeon to accidentally step on or miss a pedal switch, which significantly impacts the progress of maxillofacial surgery and increases the surgical risk. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a surgical chair with adjustable height that can be controlled and adjusted by the surgeon, effectively avoiding cumbersome operations caused by excessive communication.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0005] A surgical lifting chair is provided, comprising a base, a set of universal wheels on the bottom surface of the base, movable locking components for locking the position of the base on both sides of the base, a first gas spring in the middle of the base, and a first foot switch for controlling the first gas spring on the base; the bottom end of the first foot switch is located inside the base, and a lifting control rod is provided inside the base, with a horizontally oriented lifting control pivot in the middle of the lifting control rod; one end of the lifting control rod abuts against the bottom end of the first foot switch, and the other end of the lifting control rod abuts against the control column of the first gas spring;

[0006] The top of the gas spring is connected to the seat base, and the gas spring and the seat base are rotatably engaged; the top of the seat base is provided with a seat, and the two sides of the seat base are provided with armrests; the seat base is connected to a backrest through a backrest adjustment assembly; the backrest adjustment assembly includes a crossbar, the middle of which is provided with a second gas spring, the crossbar connects the armrests on both sides of the seat base, and each armrest is provided with an elbow switch to control the second gas spring.

[0007] Furthermore, a foot pedal is also provided on the base. The foot pedal is connected to the base through an adjustment component. The adjustment component adjusts the relative height between the foot pedal and the base. A second foot switch for controlling the adjustment component is provided on the foot pedal.

[0008] When the seat height is adjusted to a suitable position for surgery, the legs will dangle in the air if the person is not tall enough. Setting up a foot pedal and adjusting the height of the foot pedal through a second foot switch can avoid the above problem.

[0009] Furthermore, the movable locking assembly includes a foot plate, a pivot on one side of the foot plate, and lifting rods rotatably connected to both ends of the pivot. The lifting rods include a fixed rod and a telescopic rod, with a telescopic return spring abutting the bottom end of the telescopic rod against the bottom end of the fixed rod. An anti-slip plate is provided on the bottom surface of the foot plate, perpendicular to the foot plate, and an anti-slip rubber block is provided at the bottom end of the anti-slip plate. A locking hook plate is also provided on the bottom surface of the foot plate, with a barb at the bottom end. A locking groove that mates with the barb is provided on the bottom surface of the base. When the movable locking assembly is in the unlocked state, the locking hook plate is perpendicular to the base.

[0010] The movable locking component achieves locking and contact locking by applying pressure to different positions on the footplate, and the whole process is simple and quick.

[0011] Furthermore, a vertical first linkage rod is provided at the bottom of the elbow switch. The bottom end of the first linkage rod is located inside the handrail, and a return spring abuts against the bottom end of the first linkage rod and the handrail. A first abutment block protruding from the first linkage rod is provided on the side wall of the first linkage rod, and the lower end of the first abutment block smoothly transitions to the side wall of the first linkage rod. A second linkage rod perpendicular to the first linkage rod is provided inside the handrail, and the second linkage rod abuts against the first linkage rod. When the elbow switch is pressed, the second linkage rod is abutted away from the first linkage rod by the first abutment block.

[0012] The handrail is provided with a sliding groove for the second linkage rod to slide. The end of the second linkage rod away from the first linkage rod is rotatably connected to a third linkage rod. The third linkage rod is located inside the crossbar. A vertical linkage shaft is provided in the middle of the third linkage rod. The end of the third linkage rod away from the second linkage rod abuts against the control column of the second pneumatic rod.

[0013] Furthermore, the adjustment component includes a hollow square column with two symmetrically arranged lifting slots on one side. A slider is slidably fitted inside the lifting slot, and the slider is fixedly connected to the foot pedal. A strong spring is connected to the top surface of the slider and the top wall of the lifting slot. A rack is vertically arranged on the side wall of the square column. A locking rod is arranged inside the foot pedal and is slidably arranged in a direction perpendicular to the rack. One end of the locking rod near the rack protrudes from the foot pedal, and a toothed block that meshes with the rack is provided at the end of the locking rod near the rack. A locking spring is abutted against the inner wall of the foot pedal at the other end of the locking rod. The locking rod is connected to the second foot switch through a linkage component. When the second foot switch is pressed, the toothed block disengages from the rack. When the second foot switch is released, the toothed block engages with the rack.

[0014] Furthermore, the linkage assembly includes a pedal rod vertically located inside the foot pedal. The top end of the pedal rod is fixedly connected to the second foot switch, and the bottom end of the pedal rod abuts against the foot pedal with a pedal rod return spring. A slot is provided on the locking rod, and the pedal rod is located in the slot. A raised second abutment is provided on the pedal rod, and the second abutment is located on the side of the slot near the second foot switch. The second abutment smoothly transitions to the side wall of the pedal rod. When the second foot switch is pressed, the second abutment is located in the slot, and the second abutment pushes the locking rod away from the square column, separating the toothed block from the rack.

[0015] Furthermore, the foot pedal includes a horizontal board body, and a stabilizing plate perpendicular to the board body is provided below the board body. The stabilizing plate is in contact with the surface of the square column, and the stabilizing plate and the square column are in sliding cooperation.

[0016] The stabilizing plate increases the stability of the main body of the plate and prevents it from bending and causing irreversible damage when stepped on.

[0017] Furthermore, several reinforcing uprights are provided between the main body of the plate and the stabilizing plate; these reinforcing uprights are evenly distributed along the length of the stabilizing plate.

[0018] The reinforcement of the uprights enhances the stability of the main body of the board.

[0019] Furthermore, the base is provided with a groove to accommodate the foot pedal, and when the foot pedal is in the lowest position, the top surface of the foot pedal is flush with the top surface of the base.

[0020] Furthermore, the foot pedal is equipped with a foot switch bracket, which includes a connecting rod and several bracket rings for placing the foot switch. Cable management channels are also provided on both sides of the foot pedal.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention uses an elbow switch to control the second gas spring, thereby adjusting the backrest position to achieve seat depth adjustment. A first foot switch controls the first gas spring, thereby adjusting the height of the seat base and seat. The entire adjustment process is completed by the surgeon's feet or elbows, and the surgeon can make the adjustment based on their own comfort, allowing for a faster adjustment to a position that better suits their preferences. This eliminates the need for coordination with an assistant, reducing the assistant's workload and the time spent on communication and adjustment.

[0023] The seat height, backrest, footrest height, and overall position locking adjustments all utilize a stable mechanical structure, eliminating the need for batteries or other power sources. This prevents situations where forgetting to charge the chair results in insufficient power for adjustments during surgery. Furthermore, the footrest switch bracket cleverly conceals the cables of other surgical equipment at the rear of the adjustable chair, preventing them from obstructing the surgeon's view. The footrest switches are secured by a bracket ring, allowing for convenient access without the surgeon needing to bend down to search for multiple switches. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 A schematic diagram of the control connection structure between the first foot switch and the first pneumatic rod;

[0026] Figure 3 This is a schematic diagram of the movable locking component in the unlocked state.

[0027] Figure 4 A schematic diagram of the structure when the movable locking component is in the locked state;

[0028] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 This is a schematic diagram of the internal structure of the lifting boom;

[0030] Figure 7 A schematic diagram of the control connection structure between the elbow switch and the second pneumatic lever;

[0031] Figure 8 To adjust the component assembly diagram;

[0032] Figure 9 A schematic diagram of the internal structure of the adjustment component;

[0033] The components include: 1. Base; 2. Casters; 3. First gas spring; 4. First foot switch; 5. Lifting control lever; 6. Lifting control pivot; 7. Seat base; 8. Seat; 9. Armrest; 10. Backrest; 11. Crossbar; 12. Second gas spring; 13. Elbow switch; 14. Foot pedal; 15. Second foot switch; 16. Step plate; 17. Pivot; 18. Lifting rod; 181. Fixed rod; 182. Telescopic rod; 183. Telescopic return spring; 19. Anti-slip plate; 20. Anti-slip rubber block; 21. Locking hook plate; 22. Barb; 23. Locking groove; 4. First connecting rod; 25. Return spring; 26. First abutment block; 27. Second connecting rod; 28. Slide groove; 29. ​​Third connecting rod; 30. Connecting shaft; 31. Square column; 32. Lifting groove; 33. Sliding block; 34. Strong spring; 35. Rack; 36. Locking rod; 37. Tooth block; 38. Step rod; 39. Step rod return spring; 40. Bar hole; 41. Second abutment block; 42. Plate body; 43. Stabilizing plate; 44. Reinforcing upright plate; 45. Groove; 46. Locking block; 47. Locking spring; 48. Connecting rod; 49. Bracket ring; 50. Cable management groove. Detailed Implementation

[0034] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0035] like Figure 1-9 As shown, a surgical lifting chair includes a base 1, with casters 2 on the bottom surface of the base 1, and movable locking components for locking the position of the base 1 on both sides of the base 1. A first gas spring 3 is located in the middle of the base 1, and a first foot switch 4 for controlling the first gas spring 3 is located on the base 1. The bottom end of the first foot switch 4 is located inside the base 1, and a lifting control rod 5 is located inside the base 1. A horizontal lifting control pivot 6 is located in the middle of the lifting control rod 5. One end of the lifting control rod 5 abuts against the bottom end of the first foot switch 4, and the other end of the lifting control rod abuts against the control column of the first gas spring 3.

[0036] When the height of the seat base 7 needs to be adjusted, step on the first foot switch 4, which will cause one end of the lifting control lever 5 to move downward. Because the lifting control shaft 6 is set to realize the lever structure, the other end of the lifting control lever 5 will rise upward. The rise of the other end of the lifting control lever 5 will drive the control column of the first gas rod 3 to move upward, thereby connecting the gas in the two chambers of the first gas rod 3. By controlling the pressure on the seat base 7, the length of the first gas rod 3 can be adjusted to realize the height adjustment of the seat 8.

[0037] A seat base 7 is connected to the top of a pneumatic lever, and the pneumatic lever and seat base 7 are rotatably engaged. A seat 8 is mounted on the top of the seat base 7, and armrests 9 are mounted on both sides of the seat base 7. The seat base 7 is connected to a backrest 10 via a backrest adjustment assembly. The backrest adjustment assembly includes a crossbar 11, with a second pneumatic lever 12 positioned in the middle of the crossbar 11. The crossbar 11 connects the armrests 9 on both sides of the seat base 7, and an elbow switch 13 controlling the second pneumatic lever 12 is mounted on each armrest 9. In actual operation, the elbow switch 13 is positioned in the middle of the armrest 9, so that it does not affect the elbow's support on the armrest 9. When the elbow switch 13 needs to be pressed, the elbow only needs to be moved slightly backward to make contact with the elbow switch 13. During general anesthesia, to ensure a sterile environment, the armrests 9 are covered with sterilized surgical drapes, and the elbow switch 13 is also covered with sterilized surgical drapes, ensuring aseptic operation for the surgeon.

[0038] The base 1 is also provided with a foot pedal 14, which is connected to the base 1 via an adjustment component. The adjustment component adjusts the relative height between the foot pedal 14 and the base 1. The foot pedal 14 is provided with a second foot switch 15 for controlling the adjustment component.

[0039] The movable locking assembly includes a foot plate 16, a pivot 17 on one side of the foot plate 16, and lifting rods 18 rotatably connected to both ends of the pivot 17. The lifting rods 18 include a fixed rod 181 and a telescopic rod 182. The bottom end of the telescopic rod 182 abuts against the bottom end of the fixed rod 181 with a telescopic return spring 183. An anti-slip plate 19 is provided on the bottom surface of the foot plate 16. The anti-slip plate 19 is perpendicular to the foot plate 16, and an anti-slip rubber block 20 is provided at the bottom end of the anti-slip plate 19. A locking hook plate 21 is also provided on the bottom surface of the foot plate 16. A barb 22 is provided at the bottom end of the locking hook plate 21. A locking groove 23 that mates with the barb 22 is provided on the bottom surface of the base 1. When the movable locking assembly is in the unlocked state, the locking hook plate 21 is perpendicular to the base 1.

[0040] When the moving locking component is in an unlocked state, such as Figure 3As shown, when locking is required, the foot applies downward pressure to the edge of the footplate 16 away from the base 1. The footplate 16 drives the locking hook plate 21 to rotate along the pivot 17. The bottom end of the anti-slip plate 19 contacts the ground, and the anti-slip rubber block 20 deforms under pressure, providing friction. At the same time, the barbs 22 of the locking hook plate 21 engage in the locking groove 23, preventing the footplate 16 from rotating under pressure. Figure 4 As shown; when it is necessary to unlock, use your foot to apply downward pressure to the edge of the footrest 16 away from the anti-slip plate 19. The edge of the footrest 16 away from the anti-slip plate 19 moves downward, increasing the downward pressure. The deformation of the anti-slip rubber block 20 increases. Since the anti-slip plate 19 is in contact with the ground, the footrest 16 moves downward and rotates in the opposite direction along the pivot 17. The downward movement distance is just enough to disengage the hook 22 from the locking groove 23. With the rotation of the footrest 16, the moving locking assembly is unlocked, the downward pressure is released, and under the action of the strong spring 34, the pivot 17 moves upward. At this time, the locking hook plate 21 abuts against the side wall of the base 1, so that the anti-slip rubber block 20 will not contact the ground and will not affect the movement of the chair.

[0041] The elbow switch 13 has a vertical first linkage 24 at its bottom end, the bottom end of which is located inside the handrail 9, and a return spring 25 abuts against the bottom end of the first linkage 24 and the handrail 9. A first abutment 26 protruding from the side wall of the first linkage 24 is provided, and the lower end of the first abutment 26 smoothly transitions to the side wall of the first linkage 24. A second linkage 27 perpendicular to the first linkage 24 is provided inside the handrail 9. The second linkage 27 abuts against the first linkage 24; when the elbow switch 13 is pressed, the second linkage 27 is pushed away from the first linkage 24 by the first abutment block 26; in order to prevent the first linkage 24 and the second linkage 27 from slipping off, a locking block 46 with a recessed contact surface is provided at the contact point between the second linkage 27 and the first linkage 24, and in order to prevent the locking block 46 from jamming with the first abutment block 26, the upper end of the concave surface of the locking block 46 is also provided with an arc corner;

[0042] The handrail 9 is provided with a sliding groove 28 for the second linkage 27 to slide. The end of the second linkage 27 away from the first linkage 24 is rotatably connected to a third linkage 29. The third linkage 29 is located inside the crossbar 11. A vertical linkage shaft 30 is provided in the middle of the third linkage 29. The end of the third linkage 29 away from the second linkage 27 abuts against the control column of the second pneumatic rod 12.

[0043] When the position of the backrest 10 needs to be adjusted, the elbow switch 13 is pressed down with the elbow, which moves the first linkage 24 and the first stop block 26 downward. The downward movement of the first stop block 26 moves the second linkage 27 horizontally along the slide groove 28. The movement of the second linkage 27 drives the third linkage 29 to rotate along the linkage shaft 30. Under the action of the lever principle, the third linkage 29 will drive the control column of the second gas rod 12 to move horizontally towards the backrest 10, thereby connecting the gas in the two chambers of the second gas rod 12. By controlling the pressure against the backrest 10, the length of the second gas rod 12 can be adjusted, thereby adjusting the position of the backrest 10 and thus adjusting the seat depth. When doctors who need to lean forward during surgery or have short thighs use this invention, the backrest 10 can still provide good support.

[0044] The adjustment assembly includes a hollow square column 31. Two lifting slots 32 are symmetrically arranged on one side of the square column 31. A slider 33 slides within each lifting slot 32 and is fixedly connected to the foot pedal 14. A strong spring 34 connects the top surface of the slider 33 to the top wall of the lifting slot 32. A rack 35 is vertically arranged on the side wall of the square column 31. A locking rod 36 is installed inside the foot pedal 14 and slides perpendicular to the rack 35. One end of the locking lever 36 near the rack 35 extends out of the foot pedal 14, and the end of the locking lever 36 near the rack 35 is provided with a tooth block 37 that meshes with the rack 35. The other end of the locking lever 36 abuts against the inner wall of the foot pedal 14 with a locking spring 47. The locking lever 36 is connected to the second foot switch 15 through a linkage assembly. When the second foot switch 15 is pressed, the tooth block 37 disengages from the rack 35. When the second foot switch 15 is released, the tooth block 37 meshes with the rack 35.

[0045] When the toothed block 37 disengages from the rack 35, the foot pedal 14 moves upward under the pull of the strong spring 34, adjusting the force applied to the foot pedal 14, thereby adjusting the height of the foot pedal 14.

[0046] The linkage assembly includes a pedal 38 vertically located inside the foot pedal 14. The top end of the pedal 38 is fixedly connected to the second foot switch 15, and the bottom end of the pedal 38 abuts against the foot pedal 14 with a pedal return spring 39. A locking rod 36 has a slotted hole 40, and the pedal 38 is located inside the slotted hole 40. A protruding second abutment 41 is provided on the pedal 38, and the second abutment 41 is located on the side of the slotted hole 40 closer to the second foot switch 15. The second abutment 41 smoothly transitions to the side wall of the pedal 38. When the second foot switch 15 is pressed, the second abutment 41 is located inside the slotted hole 40, and the second abutment 41 pushes the locking rod 36 away from the square column 31, separating the toothed block 37 from the rack 35. To prevent the slotted hole 40 and the second abutment 41 from jamming, the upper end of the side wall where the slotted hole 40 contacts the second abutment 41 is provided with an arc corner.

[0047] The foot pedal 14 includes a horizontal board body 42, and a stabilizing plate 43 perpendicular to the board body 42 is provided below the board body 42. The stabilizing plate 43 is in contact with the surface of the square column 31, and the stabilizing plate 43 and the square column 31 are in sliding cooperation.

[0048] Several reinforcing uprights 44 are also provided between the plate body 42 and the stabilizing plate 43; the several reinforcing uprights 44 are evenly distributed along the length of the stabilizing plate 43.

[0049] The base 1 is provided with a groove 45 to accommodate the foot pedal 14. When the foot pedal 14 is in the lowest position, the top surface of the foot pedal 14 is flush with the top surface of the base 1. In actual installation, the main body 42, the stabilizing plate 43, and the reinforcing upright plate 44 can all be accommodated in the groove 45.

[0050] The foot pedal 14 is equipped with a foot switch bracket, which includes a connecting rod 48. The connecting rod 48 is provided with several bracket rings 49 for placing the foot switch. Cable management channels 50 are also provided on both sides of the foot pedal 14.

Claims

1. A surgical lifting chair, characterized in that, Includes a base (1), the bottom surface of which is provided with a set of casters (2), and the two sides of which are provided with movable locking components for locking the position of the base (1). A first pneumatic rod (3) is provided in the middle of the base (1), and a first foot switch (4) for controlling the first pneumatic rod (3) is provided on the base (1). The bottom end of the first foot switch (4) is located inside the base (1), and a lifting control rod (5) is provided inside the base (1). A lifting control pivot (6) with a horizontal axis is provided in the middle of the lifting control rod (5). One end of the lifting control rod (5) abuts against the bottom end of the first foot switch (4), and the other end of the lifting control rod abuts against the control column of the first pneumatic rod (3). The top of the gas spring is connected to a seat base (7), and the gas spring and the seat base (7) are rotatably coupled; a seat (8) is provided on the top of the seat base (7), and armrests (9) are provided on both sides of the seat base (7); the seat base (7) is connected to a backrest (10) through a backrest adjustment assembly; the backrest adjustment assembly includes a crossbar (11), a second gas spring (12) is provided in the middle of the crossbar (11), the crossbar (11) connects the armrests (9) on both sides of the seat base (7), and an elbow switch (13) for controlling the second gas spring (12) is provided on any of the armrests (9); The base (1) is also provided with a foot pedal (14), which is connected to the base (1) through an adjustment component. The adjustment component adjusts the relative height between the foot pedal (14) and the base (1). The foot pedal (14) is provided with a second foot switch (15) for controlling the adjustment component. The movable locking assembly includes a foot plate (16), a pivot (17) is provided on one side of the foot plate (16), and a lifting rod (18) is rotatably connected to both ends of the pivot (17). The lifting rod (18) includes a fixed rod (181) and a telescopic rod (182). The bottom end of the telescopic rod (182) abuts against the bottom end of the fixed rod (181) with a telescopic return spring (183). The bottom surface of the foot plate (16) is provided with an anti-slip plate (19), which is perpendicular to the foot plate (16). The bottom end of the anti-slip plate (19) is provided with an anti-slip rubber block (20). The bottom surface of the foot plate (16) is also provided with a locking hook plate (21), which is provided with a barb (22) at the bottom end. The bottom surface of the base (1) has a locking groove (23) that cooperates with the barb (22). When the movable locking assembly is in an unlocked state, the locking hook plate (21) is perpendicular to the base (1). The adjustment assembly includes a hollow square column (31), with two symmetrically arranged lifting slots (32) on one side of the square column (31). A slider (33) is slidably fitted inside the lifting slot (32), and the slider (33) is fixedly connected to the foot pedal (14). A strong spring (34) is connected to the top surface of the slider (33) and the top wall of the lifting slot (32). A rack (35) is vertically arranged on the side wall of the square column (31). A locking rod (36) is arranged inside the foot pedal (14), and the locking rod (36) slides in a direction perpendicular to the rack (35). The locking rod (36) extends out of the foot pedal (14) at one end near the rack (35), and the locking rod (36) near the rack (35) is provided with a tooth block (37) that meshes with the rack (35). The other end of the locking rod (36) abuts against the inner wall of the foot pedal (14) with a locking spring (47). The locking rod (36) is connected to the second foot switch (15) through a linkage assembly. When the second foot switch (15) is pressed, the tooth block (37) disengages from the rack (35). When the second foot switch (15) is released, the tooth block (37) meshes with the rack (35).

2. The surgical lifting chair according to claim 1, characterized in that, The elbow switch (13) has a vertical first linkage rod (24) at its bottom end. The bottom end of the first linkage rod (24) is located inside the armrest (9), and a return spring (25) abuts against the armrest (9) at the bottom end of the first linkage rod (24). A first abutment block (26) protruding from the first linkage rod (24) is provided on the side wall of the first linkage rod (24), and the lower end of the first abutment block (26) smoothly transitions to the side wall of the first linkage rod (24). A second linkage rod (27) perpendicular to the first linkage rod (24) is provided inside the armrest (9), and the second linkage rod (27) abuts against the first linkage rod (24). When the elbow switch (13) is pressed, the second linkage rod (27) is abutted away from the first linkage rod (24) by the first abutment block (26). The handrail (9) is provided with a sliding groove (28) for sliding the second linkage rod (27). The end of the second linkage rod (27) away from the first linkage rod (24) is rotatably connected to the third linkage rod (29). The third linkage rod (29) is located in the crossbar (11). A vertical linkage shaft (30) is provided in the middle of the third linkage rod (29). The end of the third linkage rod (29) away from the second linkage rod (27) abuts against the control column of the second pneumatic rod (12).

3. The surgical lifting chair according to claim 1, characterized in that, The linkage assembly includes a pedal (38) vertically located inside the foot pedal (14). The top end of the pedal (38) is fixedly connected to the second foot switch (15), and the bottom end of the pedal (38) abuts against the foot pedal (14) with a pedal return spring (39). A slot (40) is provided on the locking rod (36), and the pedal (38) is located inside the slot (40). A protruding second abutment (41) is provided on the pedal (38), and the second abutment (41) is located on the side of the slot (40) near the second foot switch (15). The second abutment (41) and the side wall of the pedal (38) are smoothly transitioned. When the second foot switch (15) is pressed down, the second abutment (41) is located inside the slot (40), and the second abutment (41) pushes the locking rod (36) away from the square column (31), and the toothed block (37) separates from the rack (35).

4. The surgical lifting chair according to claim 3, characterized in that, The foot pedal (14) includes a horizontal plate body (42), and a stabilizing plate (43) perpendicular to the plate body (42) is provided below the plate body (42). The stabilizing plate (43) is in contact with the surface of the square column (31), and the stabilizing plate (43) and the square column (31) slide together.

5. The surgical lifting chair according to claim 4, characterized in that, Several reinforcing uprights (44) are also provided between the main body (42) and the stabilizing plate (43); the several reinforcing uprights (44) are evenly distributed along the length of the stabilizing plate (43).

6. The surgical lifting chair according to claim 1, characterized in that, The base (1) is provided with a groove (45) for accommodating the foot pedal (14). When the foot pedal (14) is in the lowest position, the top surface of the foot pedal (14) is flush with the top surface of the base (1).

7. The surgical lifting chair according to claim 1, characterized in that, The foot pedal (14) is provided with a device foot switch bracket, the device foot switch bracket includes a connecting rod (48), the connecting rod (48) is provided with a plurality of bracket rings (49) for placing the device foot switch, and cable management grooves (50) are also provided on both sides of the foot pedal (14).

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