Optimized installation scheme of dental chair chair position hydraulic cylinder

Abstract

The application discloses a kind of dental chair chair position hydraulic cylinder optimization installation scheme, including base, chair surface, first lifting arm, second lifting arm, hydraulic cylinder are arranged between base and chair surface, first lifting arm two ends are respectively rotationally connected to base, chair surface, second lifting arm two ends are respectively rotationally connected to base, chair surface, and hydraulic cylinder two ends are respectively rotationally connected to first lifting arm, second lifting arm.This application changes the distance between base and chair surface by hydraulic cylinder, increases the ground clearance of chair surface, and cooperates with the first lifting arm and the second lifting arm arranged in parallel, wherein the first lifting arm, the second lifting arm and the first lifting arm and the second lifting arm are connected on the base and the chair surface, forming a parallelogram. In the process of lifting the chair surface driven by the hydraulic cylinder, the angle of the chair surface relative to the ground is guaranteed not to change, only the height of the chair surface is increased, and the purpose of facilitating the use of the chair surface by disabled persons and the stability of the chair surface during the height change process are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of dental chair technology, specifically to an optimized installation scheme for a dental chair seat hydraulic cylinder. Background Technology

[0002] Dental chairs are mainly used for oral surgery and examination and treatment of oral diseases. In actual use, dental chairs need to be adjusted to different positions and fixed. In order to facilitate disabled people to get on and off the chair, the chair position should be lowered as much as possible. Traditional chairs can only be lowered to a minimum of 500mm, which is still not enough to meet the needs of disabled patients. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an optimized installation scheme for a dental chair hydraulic cylinder, solving at least one of the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An optimized installation scheme for a hydraulic cylinder in a dental chair includes a base and a chair surface. A first lifting arm, a second lifting arm, and a hydraulic cylinder are disposed between the base and the chair surface. The two ends of the first lifting arm are rotatably connected to the base and the chair surface, respectively. The two ends of the second lifting arm are rotatably connected to the base and the chair surface, respectively. The two ends of the hydraulic cylinder are rotatably connected to the first lifting arm and the second lifting arm, respectively.

[0005] Preferably, the first lifting arm and the second lifting arm are arranged in parallel, one end of the hydraulic cylinder is rotatably connected to the end of the second lifting arm near the base, and the other end of the hydraulic cylinder is rotatably connected to the end of the first lifting arm away from the base.

[0006] Preferably, the ends of the first lifting arm and the second lifting arm away from the base are rotatably connected to the balance block, the balance block is provided with a support frame, and the support frame is fixedly connected to the seat surface; The support frame is rotatably connected to symmetrically arranged armrests, with the two sets of armrests located on both sides of the chair surface; A backrest is fixedly connected to the chair surface.

[0007] Preferably, a limit lever is provided between the handrail and the support frame. The limit lever is used to restrict the relative rotation between the handrail and the support frame. When the limit lever is in the initial position, the limit lever and the support frame can rotate relative to each other. The limiting rod is connected to the pressure block, the pressure block is rotatably connected to the mounting block, and a first spring is provided between the pressure block and the mounting block. The two ends of the first spring are fixedly connected to the pressure block and the mounting block, respectively. A fixing block is fixedly connected to the mounting block, and the fixing block is fixedly connected to the support frame. The pressure block is used to adjust the position of the limit lever.

[0008] Preferably, a locking block is slidably connected inside the mounting block, and a slider is provided between the locking block and the mounting block. The slider is slidably connected to the locking block, and a second spring is provided between the slider and the mounting block. The two ends of the second spring are respectively connected to the slider and the mounting block. A connecting ball is rotatably connected inside the locking block. A linkage rod is fixedly connected to the part of the connecting ball outside the locking block. One end of the linkage rod away from the connecting ball is rotatably connected to one end of a second pressure rod. The other end of the second pressure rod is rotatably connected to the mounting block. A first pressure rod is provided between the second pressure rod and the pressure block, and the two ends of the first pressure rod are rotatably connected to the pressure block and the second pressure rod, respectively.

[0009] Preferably, the locking block is provided with a locking groove, and the fixing block on the lower side of the locking block is provided with a cavity, the cavity being located below the locking groove; A locking rod is provided on one side of the cavity. The locking rod is slidably connected to the fixed block, and a third spring is sleeved on the locking rod. The two ends of the third spring are respectively connected to the fixed block and the locking rod. A sealing bladder is fixedly connected to one end of the clamp rod outside the fixed block. The sealing bladder is used to seal the sliding channel of the clamp rod. An air pressure chamber is provided on the outside of the sealing bladder. The air pressure chamber is connected to the sliding channel of the sealing rod and is connected to an airbag provided inside the chair surface.

[0010] Preferably, a lever is fixedly connected below the locking block, the lever is slidably connected inside the cavity, and the lever portion is located outside the cavity.

[0011] Preferably, a stabilizing component is provided between the chair surface and the balance block. The stabilizing component includes a stabilizing plate, on which a longitudinal elastic telescopic rod and a transverse elastic telescopic rod are provided. The stabilizing plate is fixedly connected to the support frame. The outer end of the transverse elastic telescopic rod is fixedly connected to the chair surface. The longitudinal elastic telescopic rod located above the stabilizing plate is slidably connected to the chair surface. The longitudinal elastic telescopic rod located above the stabilizing plate is fixedly connected to the balance block.

[0012] Preferably, the stabilizer includes an outer shell and an inner shell, with the inner shell nested inside the outer shell. A longitudinal fixing member is provided between the outer shell and the inner shell. The longitudinal fixing member has a semi-circular cross-section and is symmetrically arranged. A fixing buckle is engaged in a fixing hole provided on the outer shell outside the longitudinal fixing member. The fixing buckle is used to fix the outer shell and the longitudinal fixing member. A longitudinal elastic telescopic rod is connected inside the longitudinal fixing member. A horizontally placed fixing member is provided through the outer shell and the inner shell, and a horizontally placed elastic telescopic rod is connected inside the horizontally placed fixing member; One end of the horizontally fixed member located inside the inner shell is fixedly connected to one end of the fourth spring, and the other end of the fourth spring is fixedly connected to an auxiliary moving block. A rolling wheel is rotatably connected to the auxiliary moving block. An installation compartment is fixedly connected inside the inner shell, and a pressure plate is rotatably connected to the installation compartment. The pressure plate is located outside the auxiliary moving block, and a fifth spring is fixedly connected between two adjacent sets of pressure plates. The auxiliary moving block is fixedly connected to a limiting rod at one end away from the fourth spring. The limiting rod is slidably inserted into the placement chamber, and a limiting plate is fixedly connected to the limiting rod located in the placement chamber.

[0013] Preferably, a balance plate is fixedly connected to the longitudinal fixing member, and the balance plate overlaps the outer periphery of the transverse fixing member.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: This application uses a hydraulic cylinder to change the distance between the base and the seat, increasing the distance between the seat and the ground. At the same time, it works in conjunction with a first lifting arm and a second lifting arm arranged in parallel. The first lifting arm, the second lifting arm, and the connection interval between the first lifting arm and the second lifting arm on the base and the seat form a parallelogram. During the process of the hydraulic cylinder driving the seat to rise, it ensures that the angle of the seat relative to the ground does not change. It only increases the height of the seat, which not only ensures that the seat is convenient for people with disabilities to use, but also ensures the stability of the seat during the height change process. When the seat is at its lowest position, the angle between the hydraulic cylinder and the horizontal plane is less than 10°, the first lifting arm is parallel to the horizontal plane, and the seat height is 258mm, making it convenient for people with disabilities to get on and off. When the chair is at its highest position, the hydraulic cylinder makes an angle of 75° with the horizontal plane, and the chair height is 685mm, which facilitates the operation of dentists. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the chair surface of the present invention in its lowest position. Figure 2 This is a structural diagram of the chair surface of the present invention in its highest position. Figure 3 This is a schematic diagram of the handrail limiting component structure of the present invention; Figure 4 This is a schematic diagram of the stable component structure of the present invention; Figure 5 This is a schematic diagram of the stabilizer disk structure of the present invention; Figure 6 This is a schematic diagram of the longitudinally placed fixing member structure of the present invention.

[0016] In the diagram: 1. Base; 2. Seat surface; 3. Backrest; 4. Support frame; 5. First lifting arm; 6. Second lifting arm; 7. Hydraulic cylinder; 8. Armrest; 9. Balance block; 10. Fixing block; 11. Pressure block; 12. First spring; 13. First pressure rod; 14. Second pressure rod; 15. Linkage rod; 16. Connecting ball; 17. Locking block; 18. Mounting block; 19. Locking groove; 20. Second spring; 21. Lever; 22. Cavity; 23. Locking rod; 24. Third... 25. Spring; 26. Sealing bladder; 27. Air chamber; 28. Stabilizing disc; 29. ​​Longitudinal elastic telescopic rod; 30. Transverse elastic telescopic rod; 31. Fixing hole; 32. Outer shell; 33. Inner shell; 34. Longitudinal fixing component; 35. Fixing buckle; 36. Transverse fixing component; 37. Fourth spring; 38. Auxiliary moving block; 39. Rolling wheel; 40. Limiting rod; 41. Placement chamber; 42. Limiting plate; 43. Pressure plate; 44. Fifth spring; 45. Balance plate. Detailed Implementation

[0017] 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.

[0018] Example 1 Please see Figure 1-2 The present invention provides a technical solution: an optimized installation scheme for a hydraulic cylinder for a dental chair seat, including a base 1 and a chair surface 2. A first lifting arm 5, a second lifting arm 6, and a hydraulic cylinder 7 are provided between the base 1 and the chair surface 2. The two ends of the first lifting arm 5 are rotatably connected to the base 1 and the chair surface 2, respectively. The two ends of the second lifting arm 6 are rotatably connected to the base 1 and the chair surface 2, respectively. The two ends of the hydraulic cylinder 7 are rotatably connected to the first lifting arm 5 and the second lifting arm 6, respectively.

[0019] Preferably, the first lifting arm 5 and the second lifting arm 6 are arranged in parallel, one end of the hydraulic cylinder 7 is rotatably connected to the end of the second lifting arm 6 near the base 1, and the other end of the hydraulic cylinder 7 is rotatably connected to the end of the first lifting arm 5 away from the base 1.

[0020] Preferably, the ends of the first lifting arm 5 and the second lifting arm 6 away from the base 1 are rotatably connected to the balance block 9. The balance block 9 is provided with a support frame 4, and the seat 2 is fixedly connected to the support frame 4. The support frame 4 is rotatably connected to symmetrically arranged armrests 8, with the two sets of armrests 8 located on both sides of the seat surface 2; A backrest 3 is fixedly connected to the seat 2.

[0021] The working principle and beneficial effects of the above scheme are as follows: This application uses a hydraulic cylinder 7 to change the distance between the base 1 and the seat 2, increasing the distance between the seat 2 and the ground. At the same time, it works in conjunction with the first lifting arm 5 and the second lifting arm 6 arranged in parallel. The first lifting arm 5, the second lifting arm 6, and the connection interval of the first lifting arm 5 and the second lifting arm 6 on the base 1 and the seat 2 form a parallelogram. During the process of the hydraulic cylinder 7 driving the seat 2 to rise, it ensures that the angle of the seat 2 relative to the ground does not change. It only increases the height of the seat 2, which not only ensures that the seat 2 is convenient for people with disabilities to use, but also ensures the stability of the seat 2 during the height change process. When the seat 2 is at its lowest position, the angle between the hydraulic cylinder 7 and the horizontal plane is less than 10°, the first lifting arm 5 is parallel to the horizontal plane, and the height of the seat 2 is 258mm, which makes it convenient for people with disabilities to get on and off. When the seat 2 is at its highest position, the angle between the hydraulic cylinder 7 and the horizontal plane is 75°, and the height of the seat 2 is 685mm, which facilitates the operation of dentists.

[0022] Example 2 Please see Figure 3 Based on embodiment 1, a limiting rod is provided between the handrail 8 and the support frame 4. The limiting rod is used to restrict the relative rotation between the handrail 8 and the support frame 4. When the limiting rod is in the initial position, the limiting rod and the support frame 4 can rotate relative to each other. The limiting rod is connected to the pressure block 11, the pressure block 11 is rotatably connected to the mounting block 18, and a first spring 12 is provided between the pressure block 11 and the mounting block 18. The two ends of the first spring 12 are fixedly connected to the pressure block 11 and the mounting block 18 respectively. A fixing block 10 is fixedly connected to the mounting block 18, and the fixing block 10 is fixedly connected to the support frame 4; The pressure block 11 is used to adjust the position of the limit lever.

[0023] Preferably, a locking block 17 is slidably connected inside the mounting block 18, and a slider is provided between the locking block 17 and the mounting block 18. The slider is slidably connected to the locking block 17, and a second spring 20 is provided between the slider and the mounting block 18. The two ends of the second spring 20 are respectively connected to the slider and the mounting block 18. A connecting ball 16 is rotatably connected inside the locking block 17. A linkage rod 15 is fixedly connected to the part of the connecting ball 16 located outside the locking block 17. One end of the linkage rod 15 away from the connecting ball 16 is rotatably connected to one end of the second pressure rod 14. The other end of the second pressure rod 14 is rotatably connected to the mounting block 18. A first pressure rod 13 is provided between the second pressure rod 14 and the pressure block 11, and the two ends of the first pressure rod 13 are rotatably connected to the pressure block 11 and the second pressure rod 14, respectively.

[0024] Preferably, the locking block 17 is provided with a locking groove 19, and the fixing block 10 on the lower side of the locking block 17 is provided with a cavity 22, the cavity 22 being located below the locking groove 19; A locking rod 23 is provided on one side of the cavity 22. The locking rod 23 is slidably connected to the fixing block 10, and a third spring 24 is sleeved on the locking rod 23. The two ends of the third spring 24 are respectively connected to the fixing block 10 and the locking rod 23. The end of the clamping rod 23 located outside the fixing block 10 is fixedly connected to a sealing bladder 25, which is used to seal the sliding channel of the clamping rod 23. An air pressure chamber 26 is provided on the outside of the sealing bladder 25. The air pressure chamber 26 is connected to the sliding channel of the sealing rod 23. The air pressure chamber 26 is also connected to an airbag provided inside the seat surface 2.

[0025] Preferably, a lever 21 is fixedly connected below the locking block 17, the lever 21 is slidably connected inside the cavity 22, and part of the lever 21 is located outside the cavity 22.

[0026] The working principle and beneficial effects of the above scheme are as follows: During the process of a patient sitting in the chair, the front of the dental chair is relatively long, making it difficult to sit on the chair from the front. The armrests 8 of traditional dental chairs are fixed, and even if the height of the seat 2 is lowered, the height of the armrests 8 is still relatively high, making it difficult for the patient to sit on the chair. This application solves the problem by rotating the armrests 8 to the support frame 4 and setting a limit lever to control whether the armrests 8 and the support frame 4 can rotate. When the armrests 8 and the support frame 4 can rotate, the armrests 8 are rotated to be flush with the support frame 4, ensuring that the patient can get on and off smoothly. After the patient is seated, the armrests 8 are rotated to return to their original position, thus limiting the rotation function of the armrests 8 and the support frame 4 and ensuring the stability of the armrests 8. When the first spring 12 is in the contracted state, the rotation function of the handrail 8 and the support frame 4 is restricted; During the process of the patient sitting in the chair, the armrest 8 needs to be laid flat until it is flush with the support frame 4. Then, the patient sits in the chair, the seat 2 is compressed, and the internal airbag is compressed, which increases the air pressure in the air chamber 26. The locking lever 23 is squeezed and moved, and the armrest 8 is rotated to be perpendicular to the support frame 4. During the above process, the first spring 12 is in a relaxed state. Then, the lever 21 is moved so that the lever 21 is not in the locking position of the locking lever 23. The pressure block 11 is pressed until the first spring 12 is in a contracted state. The lever 21 is moved again, and the locking lever 23 is engaged in the locking groove 19, so that the first spring 12 is in a contracted state and cannot be relaxed. That is, the rotation function of the armrest 8 and the support frame 4 is restricted, ensuring the safety of the patient after sitting down.

[0027] Example 3 Please see Figure 4-6Based on embodiments 1-2, a stabilizing component is provided between the seat surface 2 and the balance block 9. The stabilizing component includes a stabilizing plate 27, on which a longitudinal elastic telescopic rod 28 and a transverse elastic telescopic rod 29 are provided. The stabilizing plate 27 is fixedly connected to the support frame 4. The outer end of the transverse elastic telescopic rod 29 is fixedly connected to the seat surface 2. The longitudinal elastic telescopic rod 28 located above the stabilizing plate 27 is slidably connected to the seat surface 2. The longitudinal elastic telescopic rod 28 located above the stabilizing plate 27 is fixedly connected to the balance block 9.

[0028] Preferably, the stabilizing disk 27 includes an outer shell 31 and an inner shell 32, with the inner shell 32 nested inside the outer shell 31. A longitudinal fixing member 33 is provided between the outer shell 31 and the inner shell 32. The cross-section of the longitudinal fixing member 33 is semi-circular, and the longitudinal fixing members 33 are symmetrically arranged. A fixing buckle 34 is engaged in the fixing hole 30 provided on the outer shell 31 outside the longitudinal fixing member 33. The fixing buckle 34 is used to fix the outer shell 31 and the longitudinal fixing member 33. A longitudinal elastic telescopic rod 28 is connected inside the longitudinal fixing member 33. A horizontal fixing member 35 is provided through the outer shell 31 and the inner shell 32, and a horizontal elastic telescopic rod 29 is connected inside the horizontal fixing member 35. One end of the horizontally fixed member 35 located inside the inner shell 32 is fixedly connected to one end of the fourth spring 36, and the other end of the fourth spring 36 is fixedly connected to the auxiliary moving block 37. A rolling wheel 38 is rotatably connected to the auxiliary moving block 37. An installation chamber 40 is fixedly connected inside the inner shell 32. A pressure plate 42 is rotatably connected to the installation chamber 40. The pressure plate 42 is located outside the auxiliary moving block 37. A fifth spring 43 is fixedly connected between two adjacent sets of pressure plates 42. The auxiliary moving block 37 is fixedly connected to a limiting rod 39 at one end away from the fourth spring 36. The limiting rod 39 is slidably inserted into the placement chamber 40, and a limiting plate 41 is fixedly connected to the limiting rod 39 located in the placement chamber 40.

[0029] Preferably, a balance plate 44 is fixedly connected to the longitudinal fixing member 33, and the balance plate 44 overlaps the outer periphery of the transverse fixing member 35.

[0030] The working principle and beneficial effects of the above scheme are as follows: During the process of a patient getting on and off the chair, a certain force is applied to the chair surface 2. This can easily cause instability in the chair, affecting the stability and long-term use of the lifting structures such as the first lifting arm 5, the second lifting arm 6, and the hydraulic cylinder 7. The stabilizing component is designed so that when the patient applies a longitudinal force to the chair, the longitudinally placed elastic telescopic rod 28 retracts to store force, counteracting the force applied by the patient, and then releases it. During this process, the lifting structures such as the first lifting arm 5, the second lifting arm 6, and the hydraulic cylinder 7 are not affected, and the force applied by the patient to these structures is significantly reduced. The multiple lifting mechanisms, including the first lifting arm 5, the second lifting arm 6, and the hydraulic cylinder 7, are protected. When a patient applies a lateral force to the chair, the horizontal elastic telescopic rod 29 retracts to store force. When the lateral force exceeds a certain level, it compresses the fourth spring 36, which in turn compresses the auxiliary moving block 37, causing it to move. The rolling wheel 38 on the auxiliary moving block 37 moves relative to the pressure plate 42, causing the pressure plate 42 to rotate and compress the fifth spring 43, storing force. This ensures the stability of the lifting mechanisms, including the first lifting arm 5, the second lifting arm 6, and the hydraulic cylinder 7, making the chair more durable. Because the chair is subjected to a lot of longitudinal forces, the longitudinal elastic telescopic rod 28 is more prone to damage. A fixing buckle 34 is set to fix the longitudinal fixing part 33, and then the longitudinal elastic telescopic rod 28 is fixed. After unscrewing the fixing buckle 34, the longitudinal elastic telescopic rod 28 can be removed, making maintenance simpler.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An optimized installation scheme for a dental chair seat hydraulic cylinder, characterized in that: Includes a base (1) and a seat (2). A first lifting arm (5), a second lifting arm (6), and a hydraulic cylinder (7) are provided between the base (1) and the seat (2). The two ends of the first lifting arm (5) are rotatably connected to the base (1) and the seat (2), respectively. The two ends of the second lifting arm (6) are rotatably connected to the base (1) and the seat (2), respectively. The two ends of the hydraulic cylinder (7) are rotatably connected to the first lifting arm (5) and the second lifting arm (6), respectively. The ends of the first lifting arm (5) and the second lifting arm (6) away from the base (1) are rotatably connected to the balance block (9). A support frame (4) is provided on the balance block (9), and a seat surface (2) is fixedly connected to the support frame (4). The support frame (4) is rotatably connected to symmetrically arranged armrests (8), and the two sets of armrests (8) are located on both sides of the seat surface (2); A limit lever is provided between the handrail (8) and the support frame (4). The limit lever is used to restrict the relative rotation between the handrail (8) and the support frame (4). When the limit lever is in the initial position, the limit lever and the support frame (4) can rotate relative to each other. The limiting lever is connected to the pressure block (11), the pressure block (11) is rotatably connected to the mounting block (18), and a first spring (12) is provided between the pressure block (11) and the mounting block (18). The two ends of the first spring (12) are fixedly connected to the pressure block (11) and the mounting block (18) respectively. A fixing block (10) is fixedly connected to the mounting block (18), and the fixing block (10) is fixedly connected to the support frame (4); The pressure block (11) is used to adjust the position of the limiting lever; A locking block (17) is slidably connected inside the mounting block (18), and a slider is provided between the locking block (17) and the mounting block (18). The slider is slidably connected to the locking block (17), and a second spring (20) is provided between the slider and the mounting block (18). The two ends of the second spring (20) are respectively connected to the slider and the mounting block (18). The locking block (17) is rotatably connected to a connecting ball (16), and the part of the connecting ball (16) located outside the locking block (17) is fixedly connected to a linkage rod (15). The end of the linkage rod (15) away from the connecting ball (16) is rotatably connected to one end of a second pressure rod (14), and the other end of the second pressure rod (14) is rotatably connected to the mounting block (18). A first pressure rod (13) is provided between the second pressure rod (14) and the pressure block (11), and the two ends of the first pressure rod (13) are rotatably connected to the pressure block (11) and the second pressure rod (14), respectively. The locking block (17) is provided with a locking groove (19), and the fixing block (10) on the lower side of the locking block (17) is provided with a cavity (22), and the cavity (22) is located below the locking groove (19); A locking rod (23) is provided on one side of the cavity (22). The locking rod (23) is slidably connected to the fixing block (10), and a third spring (24) is sleeved on the locking rod (23). The two ends of the third spring (24) are respectively connected to the fixing block (10) and the locking rod (23). The end of the lever (23) located outside the fixing block (10) is fixedly connected to a sealing bladder (25), which is used to seal the sliding channel of the lever (23); An air pressure chamber (26) is provided on the outside of the sealing bladder (25). The air pressure chamber (26) is connected to the sliding channel of the sealing rod (23). The air pressure chamber (26) is connected to the airbag provided inside the seat surface (2). A lever (21) is fixedly connected below the locking block (17). The lever (21) is slidably connected inside the cavity (22), and part of the lever (21) is located outside the cavity (22).

2. The optimized installation scheme for the hydraulic cylinder of the dental chair seat according to claim 1, characterized in that: The first lifting arm (5) and the second lifting arm (6) are arranged in parallel. One end of the hydraulic cylinder (7) is rotatably connected to the end of the second lifting arm (6) near the base (1), and the other end of the hydraulic cylinder (7) is rotatably connected to the end of the first lifting arm (5) away from the base (1).

3. The optimized installation scheme for the hydraulic cylinder of the dental chair seat according to claim 1, characterized in that: A backrest (3) is fixedly connected to the seat (2).

4. The optimized installation scheme for the hydraulic cylinder of the dental chair seat according to claim 2, characterized in that: A stabilizing component is provided between the seat surface (2) and the balance block (9). The stabilizing component includes a stabilizing plate (27). The stabilizing plate (27) is provided with a longitudinal elastic telescopic rod (28) and a transverse elastic telescopic rod (29). The stabilizing plate (27) is fixedly connected to the support frame (4). The outer end of the transverse elastic telescopic rod (29) is fixedly connected to the seat surface (2). The longitudinal elastic telescopic rod (28) located above the stabilizing plate (27) is slidably connected to the seat surface (2). The longitudinal elastic telescopic rod (28) located above the stabilizing plate (27) is fixedly connected to the balance block (9).

5. The optimized installation scheme for the hydraulic cylinder of the dental chair seat according to claim 4, characterized in that: The stabilizer (27) includes an outer shell (31) and an inner shell (32). The inner shell (32) is nested inside the outer shell (31). A longitudinal fixing member (33) is provided between the outer shell (31) and the inner shell (32). The cross-section of the longitudinal fixing member (33) is semi-circular, and the longitudinal fixing members (33) are symmetrically arranged. A fixing buckle (34) is snapped into the fixing hole (30) provided on the outer shell (31) outside the longitudinal fixing member (33). The fixing buckle (34) is used to fix the outer shell (31) and the longitudinal fixing member (33). A longitudinal elastic telescopic rod (28) is connected inside the longitudinal fixing member (33). A horizontal fixing member (35) is provided through the outer shell (31) and the inner shell (32), and a horizontal elastic telescopic rod (29) is connected inside the horizontal fixing member (35). The horizontal fixing member (35) is fixedly connected to one end of a fourth spring (36) inside the inner shell (32), and the other end of the fourth spring (36) is fixedly connected to an auxiliary moving block (37). A rolling wheel (38) is rotatably connected to the auxiliary moving block (37). The inner shell (32) is fixedly connected to a placement chamber (40), and a pressure plate (42) is rotatably connected to the placement chamber (40). The pressure plate (42) is located outside the auxiliary moving block (37), and a fifth spring (43) is fixedly connected between two adjacent sets of pressure plates (42). The auxiliary moving block (37) is fixedly connected to a limiting rod (39) at one end away from the fourth spring (36). The limiting rod (39) is slidably inserted into the placement chamber (40), and a limiting plate (41) is fixedly connected to the limiting rod (39) located in the placement chamber (40).

6. The optimized installation scheme for the hydraulic cylinder of the dental chair seat according to claim 5, characterized in that: A balance plate (44) is fixedly connected to the longitudinal fixing member (33), and the balance plate (44) overlaps the outer periphery of the transverse fixing member (35).

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