A foot-operated lifting chair for an operating room

Abstract

The application discloses a foot-pedal lifting chair for operating rooms and belongs to the technical field of operating room auxiliary equipment, and aims to solve the problems of the existing operating room seat that needs to be manually or nurse-assisted to adjust the height, is prone to interrupting operation, is complicated to operate, and has poor linkage between seat moving braking and lifting operation and insufficient use stability. The equipment is matched with a telescopic supporting structure composed of a fixed circular plate, a supporting rod and a sliding inner rod, a foot-pedal assembly, a lifting assembly and a linkage type braking assembly are additionally arranged, the seat braking, position moving locking and step-by-step adjustment of the seat height can be completed by relying on the foot pedaling, the seat height is locked through the cooperation of two groups of clamping plates and corresponding limiting grooves, the counterweight structure and the elastic component guarantee structure are matched to ensure quick resetting and stable operation, the operating room clinical operation scene is effectively adapted, the interruption of the operation is reduced, and the stability and comfort of the operation are improved.

Description

Technical Field

[0001] This invention relates to the field of operating room auxiliary equipment technology, and in particular to a foot-operated lifting chair for operating rooms. Background Technology

[0002] Maintaining sterility in the surgical area is a core principle in aseptic surgical procedures. The surgeon's hands, sterile gloves, and the chest and shoulder areas of their surgical gown are considered sterile and must avoid contact with any non-sterile items. Equipment in the operating room, such as chairs, becomes contaminated if touched by non-sterile personnel during surgery. Therefore, if a surgeon manually operates the chair's adjustment mechanisms after sitting down during surgery, they will contaminate their sterile gloves.

[0003] Currently, the height adjustment of operating room chairs used by surgeons generally relies on manual mechanical or electric adjustment. Manual adjustment is usually achieved by operating an adjustment lever or knob on the side; electric adjustment is operated by control buttons on the side of the chair or armrest. During surgery, when a surgeon needs to adjust the chair height in real time due to fatigue, changes in operating posture, or changes in surgical procedures, the routine practice is to interrupt the surgery and verbally instruct the circulating nurse to assist. The nurse needs to repeatedly adjust the height based on the surgeon's verbal description, which may not only disrupt the continuity of the surgery but also consume additional time in the communication and adjustment process.

[0004] From the perspective of operating room space layout and equipment integration, some chairs with complex adjustment mechanisms may have mechanical components or electric drive units that occupy a significant amount of space. In a densely populated operating room environment, these components can sometimes interfere with other instruments or pipelines, limiting the flexible placement of the chairs. Furthermore, from the perspective of surgeons' operating habits, when performing delicate surgical procedures while maintaining a seated posture for extended periods, their feet are typically in a relatively fixed natural position. Some existing foot-operated adjustment systems may, in some cases, have foot pedal positions and lever arm designs that deviate from the natural resting position of the surgeon's feet. This can make adjustment movements less intuitive or require deliberate foot movement, potentially distracting the surgeon from their surgical procedures. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing operating room chairs, such as the need for manual or nurse-assisted height adjustment, which can easily interrupt surgery, cumbersome operation, poor linkage between seat movement braking and lifting operation, and insufficient stability in use. Therefore, this invention proposes a foot-operated lifting chair for operating rooms.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A foot-operated lifting chair for operating rooms includes a fixed circular plate, a support rod fixedly mounted on the top of the fixed circular plate, a sliding inner rod slidably passing through the top of the support rod, a mounting circular plate fixedly mounted on the top of the sliding inner rod, a seat body fixedly mounted on the top of the mounting circular plate, two symmetrically arranged side plates II fixedly mounted on one side of the support rod, a common rotating plate I rotatably connecting the two side plates II, and a lifting assembly for controlling the upward movement of the sliding inner rod at one end of the rotating plate I. The bottom outer side of the support rod is provided with a foot pedal assembly for driving the rotating plate I to rotate; Multiple guide rods are fixedly installed at the bottom of the fixed circular plate, and the same rotating cross is fixedly installed at the bottom of the multiple guide rods. Universal wheels are fixedly installed at the four corners of the bottom of the rotating cross. A braking assembly for braking the device is provided below the fixed circular plate.

[0007] In one possible design, the lifting assembly includes a clearance opening at one end of a rotating plate I. A retaining plate II is rotatably connected inside the clearance opening. An operating rod II is fixedly installed on one side of the top of the retaining plate II. A circular groove is formed on one side of the inner wall of the clearance opening. A limiting rod slides through the circular groove. A compression spring is provided between one end of the limiting rod and one side of the inner wall of the circular groove. One side of the retaining plate II is flat. One end of the limiting rod abuts against the flat surface of the retaining plate II. A vertical hole is formed on the outer wall of the support rod. A plurality of longitudinally arranged limiting grooves I and limiting grooves II are formed on the outer wall of the sliding inner rod. The limiting grooves I are used in conjunction with the retaining plate II.

[0008] In one possible design, two symmetrically arranged side plates I are fixedly installed on one side of the support rod, and the two side plates I are rotatably connected by the same clamping plate I. An operating rod I is fixedly installed on one side of the top of the clamping plate I, and an installation rod I is fixedly installed on one side of the clamping plate I. A counterweight I is fixedly installed at one end of the installation rod I. The clamping plate I is used in conjunction with the limiting groove II.

[0009] In one possible design, the foot pedal assembly includes two fixed rectangular plates fixedly mounted on the outer wall of a support rod. A common rotating plate II is rotatably connected between the two fixed rectangular plates. A rectangular hole I is opened inside the rotating plate II. A connecting rotating plate is rotatably connected inside the rectangular hole I. The top of the connecting rotating plate is rotatably connected to one end of the rotating plate I. A foot pedal is fixedly mounted on one end of the rotating plate II. A mounting rod II is fixedly mounted on one side of the rotating plate II. A counterweight II is fixedly mounted on one end of the mounting rod II.

[0010] In one possible design, the braking assembly includes a single support plate slidably mounted on multiple guide rods, the bottom of the support plate having multiple rectangular holes II that cooperate with a rotating cross, a support pedal fixedly mounted on one side of the support plate, and multiple tension springs II disposed between the top of the support plate and the bottom of the fixed circular plate.

[0011] In one possible design, two symmetrically arranged connecting guide rods are fixedly installed on one side of the top of the support plate, and the same sliding horizontal plate is fixedly installed on the top of the two connecting guide rods. The sliding horizontal plate is slidably connected to one side of the support rod, and two symmetrically arranged side plates III are fixedly installed on the top of the sliding horizontal plate. The same triangular block is fixedly installed between the tops of the two side plates III.

[0012] In one possible design, the top of the fixed rectangular plate has a slot I, a locking block is slidably connected inside the slot I, a sliding plate is fixedly installed at one end of the locking block, the triangular block is located between two sliding plates, and the same tension spring I is fixedly installed between the two sliding plates, with the tension spring I and the triangular block being offset.

[0013] In one possible design, a slot II is provided on one side of the top of the rotating plate II, and the locking block engages with the slot II.

[0014] In this application, when in use, the doctor can sit on the main body of the chair, and his feet can be placed on the support pedals at the beginning. At this time, the support plate is in a suspended state, and the four casters are in contact with the ground. At this time, the device can be moved freely and can be quickly moved to the required location, ensuring that the device is easy to move. At this time, the chair is at the lowest point. When it is necessary to ensure the stability of the device and the shaking of the device is no longer required, you can directly step on the support pedal with your foot. The support pedal will drive the support plate to move down and make contact with the ground, thus ensuring the stability of the device. At this time, the support plate stretches the tension spring II and slides on multiple guide rods to ensure the stability of the downward movement of the tension spring II. This can ensure the stability of the device and make it difficult to move. Furthermore, after the support plate moves down, the support plate drives the connecting guide rod to move down, the connecting guide rod drives the sliding cross plate to move down, the sliding cross plate drives the side plates III on both sides to move down, the side plates III drive the triangular blocks to move down, and after the triangular blocks move down, they will squeeze the two sliding plates. The two sliding plates stretch the tension spring I and drive the two locking blocks to move away from each other. The two locking blocks slide inside the locking groove I and move out from both sides of the locking groove II, which can release the braking state of the rotating plate II. At this time, the foot pedal is in a pressable state. When the height of the device needs to be adjusted, the front of the foot can step on the support pedal and the heel can press the foot pedal continuously. At this time, the foot pedal drives the rotating plate II to rotate, the rotating plate II drives the connecting rotating plate to move down, the connecting rotating plate drives the rotating plate I to rotate, the rotating plate I drives the locking plate II to rotate, the locking plate II is locked inside the limiting groove I and drives the sliding inner rod to move up. The limiting groove II pushes the locking plate I on the other side. After the locking plate I rotates, it drives the mounting rod I to rotate. The mounting rod I drives the counterweight I to move up. At this time, the locking plate I moves out of one of the limiting grooves II and is locked inside the next limiting groove II to prevent the sliding inner rod from moving down. Furthermore, the limiting rod is always pressed against one side of the clamping plate II under the elastic force of the compression spring. After the foot pedal is stepped on, it is released. At this time, the rotating plate II is reset under the weight of the mounting rod II and the counterweight II. When the clamping plate II is disengaged, the limiting rod will push the clamping plate II to reset, and then the clamping plate II can be locked in the next limiting groove I. This process is repeated to realize the lifting and lowering process of the device. Pressing the operating rod II and the operating rod I can make the clamping plate I and the clamping plate II rotate, helping the device to reset to the lowest point.

[0015] Beneficial effects: This system enables foot-operated height adjustment of the seat, eliminating the need for manual operation by the doctor. Doctors can adjust the seat height simply by pressing the foot pedal while maintaining their surgical posture, avoiding interruptions and ensuring the continuity of the surgical procedure. Through the cooperation of the lifting and foot pedal components, the locking plate II can sequentially engage with multiple limiting slots I of the sliding inner rod, achieving gradual adjustment of the seat height. Simultaneously, the cooperation between the locking plate I and the limiting slots II prevents the sliding inner rod from shifting downwards, ensuring stability after seat height adjustment and meeting the height requirements of doctors of different heights and in different surgical scenarios.

[0016] Integrating movement and braking functions, the universal wheels at the bottom of the fixed circular plate allow the device to move freely, facilitating quick adjustment of the seat to the required surgical position and saving operation time. When the seat needs to be fixed, the surgeon simply steps on the support pedal to lower the support plate to contact the ground, braking the device and preventing the seat from shaking during surgery, ensuring the safety of the procedure. The guide rod ensures the stability of the support plate during its downward movement, and tension spring II can reset the support plate after releasing the support pedal, facilitating subsequent movement of the device.

[0017] The braking assembly and foot pedal assembly are linked. As the support plate moves downward to apply brakes, a connecting guide rod simultaneously moves the sliding plate downward. This, in turn, causes the triangular block to press against the sliding plate, disengaging the locking block from slot II and releasing the brake on the rotating plate II. Only then can the foot pedal be used for raising and lowering. This linkage structure prevents the device from being raised or lowered in an unsecured state, preventing wobbling during lifting and lowering, further improving operational safety. It also simplifies the operation process, allowing doctors to perform a seamless braking and raising / lowering operation using their feet, reducing the workload.

[0018] Under the elastic force of the compression spring, the limiting rod is always pressed against the locking plate II, ensuring that the locking plate II quickly resets and engages in the next limiting groove I after rotation, thus ensuring smooth lifting and lowering operations. The counterweight I can drive the locking plate I to quickly reset and engage in the limiting groove II, further improving the stability of the seat height. The counterweight II can drive the rotating plate II to quickly reset after being stepped on, facilitating continuous foot pedal lifting and lowering operations for doctors and improving the efficiency of height adjustment.

[0019] The overall structure is rationally laid out, and the components work together seamlessly. It can perform functions such as movement, braking, lifting, and resetting through simple foot operation, which is suitable for the clinical operation needs of the operating room. It can reduce the limb fatigue of doctors, improve the comfort and accuracy of surgical operations, and provide a guarantee for the smooth performance of surgery. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a foot-operated lifting chair for operating rooms proposed in this invention; Figure 2 This is a three-dimensional view from a second perspective of a foot-operated height-adjustable chair for operating rooms proposed in this invention. Figure 3 This is an exploded view of the support rod and rotating cross in a foot-operated lifting chair for operating rooms according to the present invention. Figure 4 This is an exploded view of the sliding inner rod and support rod in a foot-operated lifting chair for operating rooms according to the present invention. Figure 5 This is an exploded view of the rotating plate I and side plate II in a foot-operated lifting chair for operating rooms proposed in this invention; Figure 6 This is an exploded view of the connecting plate and foot pedal in a foot-operated lifting chair for operating rooms according to the present invention. Figure 7 This is an exploded view of the rotating plate II and side plate III in a foot-operated lifting chair for operating rooms proposed in this invention; Figure 8 This is an exploded view of the fixed circular plate and support plate in a foot-operated lifting chair for operating rooms according to the present invention.

[0021] In the diagram: 1. Support plate; 2. Fixed circular plate; 3. Support rod; 4. Seat body; 5. Connecting rotating plate; 6. Foot pedal; 7. Support pedal; 8. Rotating cross; 9. Mounting circular plate; 10. Sliding inner rod; 11. Casters; 12. Counterweight I; 13. Mounting rod I; 14. Clamping plate I; 15. Operating lever I; 16. Side plate I; 17. Side plate II; 18. Limiting groove I; 19. Limiting groove II; 20. Rotating plate I; 21. Circular groove; 22. Allowing 23. Position port; 24. Compression spring; 25. Operating lever II; 26. Clamping plate II; 27. Limiting rod; 28. Counterweight II; 29. ​​Mounting rod II; 30. Triangular block; 31. Rotating plate II; 32. Sliding horizontal plate; 33. Connecting guide rod; 34. Side plate III; 35. Slot I; 36. Fixed rectangular plate; 37. Rectangular hole I; 38. Clamping block; 39. Sliding plate; 40. Tension spring I; 41. Tension spring II; 42. Rectangular hole II; 43. Guide rod. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In one embodiment: Refer to Figure 1-8 This embodiment provides a footrest height-adjustable chair. Its overall structure mainly includes a fixed circular plate 2, a support rod 3, a sliding inner rod 10, a mounting circular plate 9, a seat body 4, a rotating plate I 20, a lifting assembly, a footrest assembly, a guide rod 43, a rotating cross 8, a caster wheel 11, and a braking assembly.

[0024] In terms of assembly, the fixed circular plate 2 is horizontally positioned, and a vertical support rod 3 is fixed to its top by welding or using eight M8 socket head cap screws. The support rod 3 is a 304 stainless steel circular tube with an outer diameter of 50mm and a wall thickness of 3mm. The sliding inner rod 10 slides through the top of the support rod 3, and a nylon bushing is provided between the two to reduce friction and noise. The top of the sliding inner rod 10 is fixed to the mounting circular plate 9 by welding, and the seat body 4 is fixed to the top of the mounting circular plate 9 by four M10 bolts. On one side of the support rod 3, two symmetrically arranged side plates II 17 are fixed by welding, and the two side plates II 17 are rotatably connected to the same rotating plate I 20 by a pin with a diameter of 8mm. One end of the rotating plate I 20 is provided with a lifting assembly for controlling the rise of the sliding inner rod 10.

[0025] A foot pedal assembly is provided on the outer bottom of the support rod 3 to drive the rotating plate I20 to rotate. Four guide rods 43, each with a diameter of 12mm, are evenly distributed and welded to the bottom of the fixed circular plate 2. A rotating cross 8 is welded to the bottom of the four guide rods 43. Universal wheels 11 with brake pads are bolted to the four corners of the bottom of the rotating cross 8. A braking assembly for braking the device is located below the fixed circular plate 2.

[0026] The lifting assembly specifically includes a clearance opening 22 at one end of the rotating plate I 20. A clamping plate II 25 is rotatably connected to the interior of the clearance opening 22 via a short pin with a diameter of 5mm. An operating rod II 24 is welded and fixed to one side of the top of the clamping plate II 25. A circular groove 21 is formed on one side of the inner wall of the clearance opening 22, through which a limiting rod 26 slides. A compression spring 23 is provided between one end of the limiting rod 26 and one side of the inner wall of the circular groove 21. The side of the clamping plate II 25 near the limiting rod 26 is machined into a flat surface, and under the elastic force of the compression spring 23, the end of the limiting rod 26 always abuts against this flat surface. A vertical hole is formed along the axial direction on the outer wall of the support rod 3, and multiple limiting grooves I 18 and limiting grooves II 19 are machined on the outer wall of the sliding inner rod 10, arranged longitudinally at equal intervals. The cross-sectional shape of the limiting groove I 18 matches the end shape of the clamping plate II 25 for engagement.

[0027] On one side of the support rod 3, below the rotating plate I20, two symmetrically arranged side plates I16 are welded and fixed. The two side plates I16 are rotatably connected to the same clamping plate I14 via a pin. An operating rod I15 is welded and fixed to the top side of the clamping plate I14. A mounting rod I13 is welded and fixed to the side of the clamping plate I14 away from the rotation axis, and a counterweight I12 is fixedly installed at the end of the mounting rod I13. The weight of the counterweight I12 is calculated to be approximately 150g, ensuring that the end of the clamping plate I14 tends to deflect towards the support rod 3 in its natural state. The shape of the end of the clamping plate I14 matches the limiting groove II19 for engagement.

[0028] The foot pedal assembly includes two fixed rectangular plates 35 bolted to the lower part of the outer wall of the support rod 3. A rotating plate II 30 is rotatably connected between the two fixed rectangular plates 35 via a 10mm diameter pin. A rectangular hole I 36 is formed inside the rotating plate II 30, and a connecting rotating plate 5 is rotatably connected inside the rectangular hole I 36 via a pin. The top of the connecting rotating plate 5 is rotatably connected to the end of the rotating plate I 20 away from the lifting assembly via a pin. A foot pedal 6 is welded to the end of the rotating plate II 30 away from the connecting rotating plate 5. A mounting rod II 28 is welded to the side of the rotating plate II 30 near the foot pedal 6, and a counterweight II 27 is fixedly installed at the end of the mounting rod II 28. The counterweight II 27 weighs approximately 200g, and its function is to keep the foot pedal 6 in its initial upward position when the rotating plate II 30 is not stepped on.

[0029] The braking assembly includes a single support plate 1 slidably mounted on four guide rods 43. The support plate 1 is a 5mm thick steel plate with four rectangular holes II 42 at its bottom. When the support plate 1 moves downward, the cross 8 can pass through the rectangular holes II 42, allowing the bottom surface of the support plate 1 to contact the ground. A support pedal 7 is welded and fixed to one side of the support plate 1. Between the top of the support plate 1 and the bottom of the fixed circular plate 2, a tension spring II 41 is provided corresponding to each guide rod 43. The initial length (free length) of the tension spring II 41 is 100mm, and its stiffness coefficient is selected so that when the doctor applies a force of 200N to 300N to the support pedal 7 with one foot, the support plate 1 can be stably pressed to the ground.

[0030] In this embodiment, two symmetrically arranged connecting guide rods 32 are welded and fixed to one side of the top of the support plate 1. A sliding horizontal plate 31 is welded and fixed to the top of the two connecting guide rods 32. The sliding horizontal plate 31 is slidably connected to one side of the support rod 3 through a sliding hole. Two symmetrically arranged side plates III 33 are welded and fixed to the top of the sliding horizontal plate 31, and the same triangular block 29 is welded and fixed between the tops of the two side plates III 33. A slot I 34 is provided on the top of each fixed rectangular plate 35, and a locking block 38 is slidably connected inside the slot I 34. A sliding plate 39 is welded and fixed to one end of the locking block 38. The two sliding plates 39 are arranged opposite each other, and the inclined part of the triangular block 29 is located between the two sliding plates 39. The same tension spring I 40 is welded and fixed between the two sliding plates 39, and the tension spring I 40 and the triangular block 29 are offset in the horizontal direction. A slot II 37 is provided on one side of the top of the rotating plate II 30. When the locking block 38 slides inward, its end can engage with the slot II 37.

[0031] The device operates as follows: In the initial state, the doctor does not step on the support pedal 7, and the support plate 1 is suspended in a high position under the tension of the tension spring II 41. The four casters 11 are in contact with the ground, allowing the device to move freely and facilitating rapid positioning within the operating room. The seat height is at its lowest point, and the locking plates I 14 and II 25 are respectively engaged in the limiting grooves II 19 and I 18 at the bottom of the sliding inner rod 10.

[0032] When the device needs to be fixed in position during surgery, the surgeon presses down on the support pedal 7. The support pedal 7 causes the support plate 1 to move downwards against the tension of the tension spring II 41 until the bottom surface of the support plate 1 is pressed firmly against the ground. Because the friction between the support plate 1 and the ground is much greater than the rolling resistance of the casters 11, the device is effectively braked and difficult to move. This design is based on the consideration of possible slight unevenness in the operating room floor. If the surface contact braking provided by the support plate 1 is not provided, and only the point brakes of the casters 11 are used, the device may still produce undesirable shaking or displacement when the surgeon makes slight movements under certain floor conditions, affecting the stability of the surgical procedure.

[0033] As the support plate 1 moves downward, the connecting guide rod 32 drives the sliding plate 31 and the triangular block 29 to move downward together. During the downward movement of the triangular block 29, its inclined surface presses against the two sliding plates 39, forcing them to overcome the tension of the tension spring I 40 and move away from each other, thereby causing the two locking blocks 38 to disengage from the locking slots II 37 of the rotating plate II 30. At this point, the rotational constraint on the rotating plate II 30 is released, and the foot pedal 6 enters a ready-to-operate state. This linkage design ensures the sequential nature of braking and unlocking operations: the device must be stabilized before height adjustment can be performed, avoiding the risk of accidental adjustment of the device while it is in motion.

[0034] When the doctor needs to raise the chair, they keep the balls of their feet on the support pedal 7 to maintain braking, and then press down on the foot pedal 6 with their heels. The foot pedal 6 drives the rotating plate II 30 to rotate against the gravitational torque of the counterweight II 27. The rotating plate II 30 pulls the rotating plate I 20 around its connection point with the side plate II 17 via the connecting plate 5. The rotation of the rotating plate I 20 causes the locking plate II 25 at its end to rise one tooth pitch on the sliding inner rod 10 (i.e., the distance from one limit groove I 18 to the next limit groove I 18). At the same time, the rise of the sliding inner rod 10 causes the inclined surface of the limit groove II 19 to push the locking plate I 14 to rotate outward, and the locking plate I 14 drives the counterweight I 12 to swing upward. After the locking plate II 25 completes one lift and the sliding inner rod 10 rises one tooth pitch, the doctor releases their heels, and under the action of the counterweight II 27, the foot pedal 6 and the rotating plate II 30 return to their original positions. At this point, the compression spring 23 pushes the limiting rod 26, thereby forcing the locking plate II 25 to rotate and reset, causing its end to fall into the next higher limiting groove I 18, preparing for the next lift. Meanwhile, the locking plate I 14, under the weight of the counterweight I 12, also rotates inward, its end locking into the limiting groove II 19 corresponding to the current height, thus preventing the sliding inner rod 10 from accidentally sliding down. Repeating the above pedaling action gradually raises the seat.

[0035] When the seat needs to be lowered, the doctor must use their hands (after the surgery is finished or while wearing non-sterile gloves) to move the operating levers II24 and I15 in sequence, so that the locking plates II25 and I14 disengage from the limiting grooves. The sliding inner rod 10 can then slowly descend to the required height or the lowest point under its own weight. Then, the operating levers are released, and the locking plates re-engage into the corresponding limiting grooves under the action of the springs and counterweights.

[0036] This application can be used in the field of operating room auxiliary equipment, or in other fields applicable to this application.

[0037] In another embodiment: Reference Figure 1-8This invention relates to a foot-operated lifting chair for operating rooms, used in the field of operating room auxiliary equipment. The structure of this embodiment is basically the same as the aforementioned embodiments, with the difference being that in some application scenarios, such as when the combined weight of the chair body 4 and the doctor is large, the downward tendency force of the sliding inner rod 10 is significant. If the weight of the counterweight I 12 is insufficient, the locking plate I 14 may not reliably engage with the limiting groove II 19 when the sliding inner rod 10 is stationary, posing a potential risk of downward slippage. Testing showed that when the total load of the chair exceeds 100kg, increasing the weight of the counterweight I 12 to approximately 220g ensures that the locking plate I 14 can effectively return to its original position and lock in various postures. Correspondingly, to balance the operating force of the foot pedal 6, the weight of the counterweight II 27 can be simultaneously increased to approximately 280g. This adjustment is an engineering adaptation for high-load conditions. Under normal loads (such as less than 80kg), the counterweight parameters of Embodiment 1 make operation easier. Therefore, the specific weight of the counterweight needs to be matched and selected according to the expected load range, and is not a fixed value.

[0038] This device features a multi-sliding, multi-pin linkage mechanical structure. During use, the pins and sliding parts can be periodically cleaned and lubricated to ensure smooth linkage and precise resetting of all components, thus extending the service life of the equipment.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A foot-operated height-adjustable chair for operating rooms, characterized in that, include: A fixed circular plate (2) is fixedly installed on the top of the fixed circular plate (2). A sliding inner rod (10) slides through the top of the support rod (3). A mounting circular plate (9) is fixedly installed on the top of the sliding inner rod (10). A seat body (4) is fixedly installed on the top of the mounting circular plate (9). Two symmetrically arranged side plates II (17) are fixedly installed on one side of the support rod (3). The two side plates II (17) are rotatably connected to the same rotating plate I (20). A lifting assembly for controlling the sliding inner rod (10) to rise is provided at one end of the rotating plate I (20). The bottom outer side of the support rod (3) is provided with a foot pedal assembly for driving the rotating plate I (20) to rotate; Multiple guide rods (43) are fixedly installed at the bottom of the fixed circular plate (2), and the same rotating cross (8) is fixedly installed at the bottom of the multiple guide rods (43). Universal wheels (11) are fixedly installed at the four corners of the bottom of the rotating cross (8). A braking component for braking the device is provided below the fixed circular plate (2).

2. The foot-operated height-adjustable chair for operating rooms according to claim 1, characterized in that, The lifting assembly includes a clearance opening (22) at one end of the rotating plate I (20). A retaining plate II (25) is rotatably connected inside the clearance opening (22). An operating rod II (24) is fixedly installed on one side of the top of the retaining plate II (25). A circular groove (21) is provided on one side of the inner wall of the clearance opening (22). A limiting rod (26) slides through the inside of the circular groove (21). A compression spring (23) is provided between one end of the limiting rod (26) and one side of the inner wall of the circular groove (21). One side of the retaining plate II (25) is flat. One end of the limiting rod (26) abuts against the plane of the retaining plate II (25). A vertical hole is provided on the outer wall of the support rod (3). A plurality of limiting grooves I (18) and limiting grooves II (19) arranged longitudinally are provided on the outer wall of the sliding inner rod (10). The limiting grooves I (18) are used in conjunction with the retaining plate II (25).

3. The foot-operated height-adjustable chair for operating rooms according to claim 1, characterized in that, Two symmetrically arranged side plates I (16) are fixedly installed on one side of the support rod (3). The two side plates I (16) are rotatably connected by the same clamping plate I (14). An operating rod I (15) is fixedly installed on one side of the top of the clamping plate I (14). An installation rod I (13) is fixedly installed on one side of the clamping plate I (14). A counterweight I (12) is fixedly installed at one end of the installation rod I (13). The clamping plate I (14) is used in conjunction with the limiting groove II (19).

4. The foot-operated lifting chair for operating rooms according to claim 1, characterized in that, The foot pedal assembly includes two fixed rectangular plates (35) fixedly installed on the outer wall of the support rod (3). The two fixed rectangular plates (35) are rotatably connected to the same rotating plate II (30). A rectangular hole I (36) is opened inside the rotating plate II (30). A connecting rotating plate (5) is rotatably connected inside the rectangular hole I (36). The top of the connecting rotating plate (5) is rotatably connected to one end of the rotating plate I (20). A foot pedal (6) is fixedly installed at one end of the rotating plate II (30). An installation rod II (28) is fixedly installed on one side of the rotating plate II (30). A counterweight II (27) is fixedly installed at one end of the installation rod II (28).

5. A foot-operated height-adjustable chair for operating rooms according to claim 4, characterized in that, The braking assembly includes a support plate (1) that is slidably sleeved on multiple guide rods (43). Multiple rectangular holes II (42) are provided at the bottom of the support plate (1). The rectangular holes II (42) are used in conjunction with the rotating cross (8). A support pedal (7) is fixedly installed on one side of the support plate (1). Multiple tension springs II (41) are provided between the top of the support plate (1) and the bottom of the fixed circular plate (2).

6. A foot-operated height-adjustable chair for operating rooms according to claim 5, characterized in that, Two symmetrically arranged connecting guide rods (32) are fixedly installed on one side of the top of the support plate (1). The same sliding horizontal plate (31) is fixedly installed on the top of the two connecting guide rods (32). The sliding horizontal plate (31) is slidably connected to one side of the support rod (3). Two symmetrically arranged side plates III (33) are fixedly installed on the top of the sliding horizontal plate (31). The same triangular block (29) is fixedly installed between the tops of the two side plates III (33).

7. A foot-operated height-adjustable chair for operating rooms according to claim 6, characterized in that, The top of the fixed rectangular plate (35) is provided with a slot I (34), and a slot block (38) is slidably connected inside the slot I (34). A sliding plate (39) is fixedly installed at one end of the slot block (38). The triangular block (29) is located between the two sliding plates (39). The same tension spring I (40) is fixedly installed between the two sliding plates (39). The tension spring I (40) and the triangular block (29) are misaligned.

8. A foot-operated height-adjustable chair for operating rooms according to claim 7, characterized in that, The rotating plate II (30) has a slot II (37) on one side of its top, and the locking block (38) engages with the slot II (37).

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