Arc-shaped lifting oral dental chair

Abstract

The invention discloses an arc-shaped lifting oral dental chair, which adopts the design that an inverted trapezoidal mounting bracket is spliced with the waist part of a trapezoidal fixing bracket, effectively integrates the functions of a force transmission fulcrum and a structure support, and integrates dispersedly arranged guide components and a load-bearing frame into a compact trapezoidal complex, thereby not only saving the space, but also simplifying the structure. And the use of complex parts, the manufacturing cost and the maintenance difficulty are reduced. Under the power driving of the driving cylinder, the guide bracket can drive the mounting bracket to lift along an arc-shaped movement track by taking the top of the guide bracket as a rotating center, so that the limitation of traditional vertical lifting is broken through, and the dental chair can more flexibly adapt to heights and postures of different patients and operation habits of dentists. No matter a patient is in a special posture or a dentist needs to treat from a specific angle, better operation convenience and comfort are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of dental chairs, and particularly to an oral dental chair with arc-shaped lifting. Background Art

[0002] In the field of existing oral medical equipment technology, conventional dental chairs generally adopt lifting structures such as multi-link mechanisms, gear-rack transmissions, or electric push rods to achieve vertical lifting functions. Such traditional technical solutions have the following significant defects: (1) The mechanical structure is complex. For example, multiple mechanisms such as cross-arm linkage components and slide rail limit devices need to be configured, resulting in cumbersome equipment assembly processes and high maintenance costs. In addition, multi-link, gear-rack, or vertical cylinder drive structures are generally adopted, and the seat is driven by a motor or a hydraulic system to achieve height adjustment in the vertical direction. However, such designs have complex transmission structures and a large number of components, resulting in high manufacturing costs and great difficulties in later maintenance; (2) The movement trajectory is single, and it can only perform linear lifting along the vertical axis, and cannot adapt to the arc-shaped lifting path required for different body position adjustments in oral diagnosis and treatment. Especially when performing fine operations in the anterior tooth area, the coordinated body positions of the patient's head and torso are difficult to effectively adjust through vertical lifting. It can be seen that the single vertical movement mode limits the flexibility of the doctor to adjust the seat inclination according to the diagnosis and treatment needs, affecting the operation vision and the accessibility of instruments; (3) The power system is redundant. To achieve vertical lifting, multiple drive units need to be superimposed or a high-precision servo motor needs to be used, significantly increasing the equipment manufacturing cost and operating energy consumption. Although the hydraulic lifting mechanism in the prior art simplifies the transmission structure, there are still technical bottlenecks such as limited movement directions and low utilization rate of the equipment layout space, and it cannot meet the advanced requirements of modern oral diagnosis and treatment for multi-dimensional movement trajectories and ergonomic adaptability.

[0003] It can be seen that the prior art still needs to be improved. Therefore, there is an urgent need for a dental chair lifting mechanism solution with a simplified structure, optimized movement trajectory, and capable of taking into account the patient's comfort and the doctor's operation requirements. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an oral dental chair with arc-shaped lifting, which is used to solve the problems of complex structure, difficult adjustment requirements of the lifting trajectory to match the natural posture of the human body, and low comfort in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: an arc-shaped lifting dental chair, comprising a seat main body, a lifting platform and a lifting mechanism. The lifting mechanism of the seat main body includes a guiding bracket, a mounting bracket, a driving cylinder and a trapezoidal fixed bracket; the mounting bracket is in an inverted trapezoid shape, and the waist of the mounting bracket is joined with the waist of the fixed bracket; the driving cylinder includes a hydraulic cylinder and a push rod movably arranged in the hydraulic cylinder, the top of the push rod is hinged to the bottom of the guiding bracket, the bottom of the hydraulic cylinder is hinged to the bottom plate of the fixed bracket, the left side of the guiding bracket is hinged to the bottom end of the mounting bracket, the right side of the guiding bracket is hinged to the top end of the fixed bracket, the hydraulic cylinder is inclined towards the guiding bracket, the fixed bracket is fixed on the lifting platform, and the seat main body is mounted on the mounting bracket.

[0006] In an embodiment of the present invention, it further includes a link bracket in a ring structure. The link bracket includes a connecting piece, a first link and a second link. The first link and the second link are connected by the connecting piece and enclose a ring shape. The first link is hinged to the mounting bracket, and the second link is hinged to the fixed bracket.

[0007] The beneficial effects of the above embodiment are as follows: The ring-shaped link bracket integrates the first and second links through the connecting piece to form a closed ring structure, enhancing the connection rigidity between the mounting bracket and the fixed bracket, dispersing the stress concentration during the movement process, and further improving the lifting stability; the ring-shaped design can also form an adaptive deformation during the movement, buffer the impact force, and extend the service life of the mechanism.

[0008] In an embodiment of the present invention, the cross-section of the guiding bracket is triangular, and the push rod is hinged at the center of the guiding bracket, and is respectively hinged to the mounting bracket and the fixed bracket on the left and right sides.

[0009] The beneficial effects of the above embodiment are as follows: The guiding bracket adopts a triangular cross-section structure, and utilizes the geometric stability of the triangle to improve the anti-torsion performance and ensure the accuracy of the lifting trajectory; the design of hinging the push rod at the center optimizes the power transmission direction, and the hinging points on the left and right sides form symmetric forces, avoiding the yaw problem caused by uneven unilateral load.

[0010] In an embodiment of the present invention, it further includes a telescopic pull rod. The top of the telescopic pull rod is hinged to the guiding bracket, and the bottom is fixedly hinged to the fixed bracket. The telescopic pull rod is arranged in parallel with the driving cylinder.

[0011] The beneficial effects of the above embodiment are as follows: Adding a telescopic pull rod arranged in parallel with the driving cylinder can share the axial load of the cylinder, prevent the push rod from deforming due to excessive lateral force; it also maintains the movement synchronization of the mechanism and ensures the smooth and coherent arc trajectory.

[0012] In an embodiment of the present invention, a horizontally arranged hinge member is fixed to the bottom of the guiding bracket, and the telescopic pull rod and the push rod are respectively hinged to the bottom end of the guiding bracket through the hinge member.

[0013] The beneficial effects of the above embodiment are as follows: The horizontal hinge member integrates the hinge points of the telescopic pull rod and the push rod at the bottom end of the guiding bracket, reducing the assembly error caused by multi-stage hinges. At the same time, unnecessary degrees of freedom are restricted through horizontal constraints, enhancing the overall structural rigidity and reducing vibration and noise during movement.

[0014] In an embodiment of the present invention, it further includes a supporting block, which is fixed at the center of the guiding bracket, and the supporting block is located on the extension line of the push rod and abuts against the top end of the hinge member.

[0015] The beneficial effects of the above embodiment are as follows: The supporting block is located on the extension line of the push rod and abuts against the top end of the hinge member, forming an auxiliary fulcrum for thrust transmission, avoiding direct impact of the push rod on the hinge member and causing wear. At the same time, the concentrated stress is dispersed to the center of the guiding bracket, preventing local structural fatigue damage.

[0016] In an embodiment of the present invention, it further includes an arc-shaped lifting outer shell, and the arc-shaped side surface of the lifting outer shell is close to the side of the guiding bracket facing away from the fixed bracket.

[0017] The beneficial effects of the above embodiment are as follows: The arc-shaped lifting outer shell fits the movement trajectory of the guiding bracket, forming a physical protection barrier to prevent dust or foreign objects from entering the hinged part; its arc profile matches the lifting path, reducing friction interference between the outer shell and the internal mechanism, and at the same time enhancing the integrity and aesthetics of the equipment appearance.

[0018] In an embodiment of the present invention, a fixed outer shell is arranged around the circumference of the lifting outer shell, and a movable opening is provided at the top of the fixed outer shell, and the lifting outer shell can be arranged to lift in the movable opening.

[0019] The beneficial effects of the above embodiment are as follows: The fixed outer shell restricts the movement range of the lifting outer shell through the movable opening at the top, preventing the outer shell from shifting or shaking during the lifting process; the surrounding design on the circumference further isolates mechanical noise and avoids accidental contact of patients or doctors with moving parts, improving safety.

[0020] In an embodiment of the present invention, the inclination angle of the hydraulic cylinder is 20 - 60°.

[0021] The beneficial effects of the above embodiment are as follows: By limiting the inclination angle of the hydraulic cylinder to 20 - 60°, the balance between space occupation and driving force efficiency is optimized through experiments to meet the requirements of different scenarios.

[0022] In an embodiment of the present invention, a plurality of mounting holes are provided on the top surface of the mounting bracket, and the seat body is detachably mounted on the mounting holes.

[0023] The beneficial effects of the above embodiments are as follows: The multiple mounting holes at the top of the mounting bracket enable modular installation of the seat body, facilitating quick replacement or adaptation to different models of seats and reducing maintenance costs; the detachable design also supports personalized configuration to meet diverse clinical needs.

[0024] As described above, the arc-shaped lifting dental chair of the present invention has the following beneficial effects: The waist joint design of the trapezoidal fixed bracket and the inverted trapezoidal mounting bracket, combined with the inclined driving cylinder and the multi-node articulated linkage structure, realizes the lifting of the seat body along an ergonomic arc-shaped trajectory. Compared with the traditional vertical lifting mechanism, this structure significantly reduces the overall volume of the mechanism by fitting the waists of the fixed bracket and the mounting bracket, making the lifting component more compact, especially suitable for the layout of dental clinics with limited space. The inclined arrangement of the driving cylinder and the articulated design of the push rod and the guiding bracket form a stable power transmission path. Through the swinging motion of the guiding bracket with the top as the rotation center, the linear thrust of the cylinder is converted into the circular arc lifting motion of the mounting bracket. This motion trajectory simulates the physiological curve of the natural adjustment of the human sitting posture, avoiding the sudden change in body position caused by the traditional rigid vertical lifting, and reducing the tension of the patient caused by the sudden change of the center of gravity during the lifting process, which is especially friendly to patients with sensitive lumbar vertebrae or limited mobility.

[0025] At the same time, the arc-shaped lifting trajectory provides the doctor with a more flexible angle adjustment freedom. The seat generates an inclination change synchronously during the lifting process, enabling the doctor to obtain an operation vision suitable for different treatment stages without frequent manual adjustment, improving the positioning accuracy of the instrument and the treatment efficiency. From a structural perspective, this design simplifies the traditional transmission components such as multi-linkages and gear racks, and replaces the complex mechanical linkage with the trapezoidal bracket joint and articulated structure, significantly reducing the number of parts and the assembly complexity. This not only reduces the manufacturing cost, but also reduces the risk of failure caused by structural redundancy, enhancing the reliability of the equipment during long-term use. In addition, the inclined layout of the hydraulic driving cylinder not only saves the horizontal space occupation, but also optimizes the power output efficiency through the lever principle, ensuring a smooth and stable lifting process and avoiding the shaking problem caused by the high center of gravity of the traditional vertical cylinder. Overall, through structural simplification and motion trajectory innovation, this solution achieves lightweight and low cost while taking into account the professional needs of medical operations and patient comfort, providing a practical technical path for the performance upgrade of dental treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the arc-shaped lifting dental chair provided by the present invention;

[0028] Figure 2 Partial structural schematic diagram of the arc-shaped lifting dental chair provided by the present invention;

[0029] Figure 3 Schematic diagram of the lifting mechanism of the arc-shaped lifting dental chair provided by the present invention;

[0030] Figure 4 Another structural schematic diagram of the lifting mechanism of the arc-shaped lifting dental chair provided by the present invention;

[0031] Figure 5 Exploded view of the lifting mechanism of the arc-shaped lifting dental chair provided by the present invention;

[0032] Figure 6 Schematic diagram of the guiding bracket structure of the arc-shaped lifting dental chair provided by the present invention.

[0033] Element reference numeral description

[0034] 1. Seat main body; 2. Lifting platform; 3. Guiding bracket; 4. Mounting bracket; 5. Driving cylinder; 51. Hydraulic cylinder; 52. Push rod; 6. Fixed bracket; 7. Link bracket; 71. Connecting piece; 72. First link; 73. Second link; 8. Telescopic pull rod; 9. Hinge; 10. Abutting block; 11. Lifting outer shell; 12. Fixed outer shell. Detailed implementation manners

[0035] The present invention provides an arc-shaped lifting dental chair. To make the purpose, technical solutions and effects of the present invention clearer and more definite, the following will further describe the present invention in detail with reference to the accompanying drawings and by way of examples.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "up and down, left and right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and should not be construed as a limitation of the present invention; in addition, terms such as "installation" and "connection" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Please refer to Figures 1 to 6 , the present invention provides an arc-shaped lifting dental chair, which includes a seat body 1, a lifting platform 2 and a lifting mechanism. The lifting mechanism of the seat body 1 includes a guiding bracket 3, a mounting bracket 4, a driving cylinder 5 and a trapezoidal fixed bracket 6; the mounting bracket 4 is in an inverted trapezoidal shape, and the waist of the mounting bracket 4 is joined with the waist of the fixed bracket 6; the driving cylinder 5 includes a hydraulic cylinder 51 and a push rod 52 movably arranged in the hydraulic cylinder 51. The top of the push rod 52 is hinged to the bottom of the guiding bracket 3, the bottom of the hydraulic cylinder 51 is hinged to the bottom plate of the fixed bracket 6, the left side of the guiding bracket 3 is hinged to the bottom end of the mounting bracket 4, the right side of the guiding bracket 3 is hinged to the top end of the fixed bracket 6, the hydraulic cylinder 51 is inclined towards the guiding bracket 3, the fixed bracket 6 is fixed on the lifting platform 2, and the seat body 1 is mounted on the mounting bracket 4.

[0038] It can be understood that the trapezoidal fixed bracket 6 has its upper base and lower base parallel and of different lengths. The waist on the side away from the mounting bracket 4 slightly contracts inward, and the waist on the side close to the mounting bracket 4 is a straight structure, forming a stable support structure. The mounting bracket 4 is designed in an inverted trapezoidal shape, with its upper base shorter and lower base longer. The waist on the side away from the fixed bracket 6 slightly contracts inward, and the waist on the side close to the fixed bracket 6 is a straight structure, which just fits tightly with the straight waist of the fixed bracket 6. The trapezoidal shape of the fixed bracket 6 enables it to better disperse the force, prevent shaking or tilting caused by external forces, and ensure the stability and safety of the entire mechanism during operation. The inverted trapezoidal design of the mounting bracket 4 not only perfectly fits with the fixed bracket 6 and has a smaller volume when folded and retracted, but also further compresses the overall volume of the lifting mechanism through the tight joining of their waists, while avoiding interference when they approach each other.

[0039] Furthermore, it also includes a connecting rod bracket 7 of an annular structure, the connecting rod bracket 7 includes a connecting piece 71, a first connecting rod 72 and a second connecting rod 73, the first connecting rod 72 and the second connecting rod 73 are connected by the connecting piece 71 and form a ring, the first connecting rod 72 is hinged on the mounting bracket 4, and the second connecting rod 73 is hinged on the fixed bracket 6. During the lifting and lowering movement of the dental chair, especially when subjected to a large load or frequent movement, the traditional connecting rod structure is prone to stress concentration, resulting in premature wear or damage of local components. The annular design of the annular connecting rod bracket 7 can evenly distribute the stress to the entire annular structure, avoiding excessive concentration of stress in a single part. This can significantly reduce the risk of component fatigue and damage caused by stress concentration, extend the service life of the lifting mechanism, reduce the maintenance cost and downtime of the equipment, and improve the overall durability and reliability of the dental chair. In addition, the annular connecting rod bracket 7 has a certain adaptive deformation ability during the movement. When the dental chair is subjected to external impact or unstable factors during the arc lifting process, the ring structure can absorb and buffer these impacts through slight elastic deformation, making the lifting movement smoother and more stable. This adaptive deformation and buffering function can not only reduce the discomfort caused by the shaking of the equipment to patients and doctors, but also protect the key components of the equipment from damage caused by sudden impact, further improving the safety and comfort of the dental chair, and also helping to maintain the long-term stable operation of the equipment.

[0040] See also Figure 6 The cross section of the guide bracket 3 is triangular, and the push rod 52 is hinged at the center of the guide bracket 3, and the left and right sides are respectively hinged to the mounting bracket 4 and the fixed bracket 6. The inherent stability characteristics of the triangle in geometric form are utilized, thereby greatly improving the torsion resistance of the guide bracket 3. The triangular cross-sectional structure can effectively disperse and resist these torques, ensuring that the guide bracket 3 always maintains a stable state during the entire lifting process, thereby providing a reliable guarantee for the accuracy of the lifting trajectory. Whether in the ascending stage or the descending stage, or under different load conditions, the guide bracket 3 can rely on its own torsion resistance to make the lifting trajectory accurately follow the predetermined path, avoiding the trajectory deviation problem caused by the shaking or twisting of the bracket. The position layout of the central hinged push rod 52 enables power to be transmitted to the push rod 52 in a more direct and efficient way, reducing the power loss and energy dissipation during the transmission process. At the same time, the hinge points on the left and right sides form a symmetrical force structure.

[0041] It also includes a telescopic pull rod 8, the top of which is hinged on the guide bracket 3, and the bottom is hinged and fixed to the fixed bracket 6, and the telescopic pull rod 8 is arranged in parallel with the driving cylinder 5. On the one hand, it can share the axial load borne by the cylinder to a large extent. When the cylinder faces a large axial force during operation, the telescopic pull rod 8 can bear part of the force, thereby effectively avoiding the deformation of the push rod 52 due to excessive lateral force, and ensuring the structural stability and normal operation of the push rod 52; on the other hand, this arrangement can also well maintain the synchronization of the mechanism during the entire movement process, so that when the mechanism is running, whether in the starting stage, the middle stage or the end stage, the cooperation between the various components can be kept coordinated and consistent, thereby ensuring that the formed arc trajectory can be presented in a smooth and coherent state, avoiding the problems of trajectory interruption and mutation caused by asynchrony, and greatly improving the accuracy and reliability of the movement of the entire mechanism.

[0042] A horizontal hinge 9 is fixed to the bottom of the guide bracket 3, and the telescopic rod 8 and the push rod 52 are respectively hinged to the bottom end of the guide bracket 3 through the hinge 9. The horizontal hinge 9 integrates the hinge point of the telescopic rod 8 and the push rod 52 at the bottom end of the guide bracket 3, reducing the assembly error caused by multi-stage hinges, and at the same time limits unnecessary degrees of freedom through horizontal constraints, enhancing the rigidity of the overall structure, and reducing vibration and noise during movement. In more detail, the guide bracket 3 also includes a support block 10, which is fixed at the center of the guide bracket 3, and the support block 10 is located on the extension line of the push rod 52 and is supported on the top of the hinge 9. In this embodiment, the supporting block 10 is a strip-shaped structure, which is horizontally arranged at the top of the guide bracket 3. At the same time, the supporting block 10 is located on the extension line of the push rod 52 and abuts against the top of the hinge 9, forming an auxiliary fulcrum for thrust transmission, thereby preventing the push rod 52 from directly impacting the hinge 9 and causing excessive wear or sudden deformation of the hinge 9. At the same time, the concentrated stress is dispersed to the center of the guide bracket 3 to prevent local structural fatigue damage.

[0043] See also Figure 2 , and also includes an arc-shaped lifting shell 11, the arc-shaped side of the lifting shell 11 is close to the side of the guide bracket 3 away from the fixed bracket 6. The arc-shaped lifting shell 11 fits the movement trajectory of the guide bracket 3 to form a physical protective barrier to prevent dust or foreign matter from invading the hinged part; its arc-shaped contour matches the lifting path, that is, the arc-shaped design of the lifting shell 11 has been in line with the movement trajectory, reducing the friction interference between the shell and the internal mechanism, while improving the integrity and aesthetics of the equipment appearance. Optionally, the outer layer of the lifting shell 11 is an antibacterial stainless steel curved surface, and the surface is matte treated to reduce reflective interference; the inner layer of the lifting shell 11 is bonded with a high-density sound-absorbing resin, and a honeycomb-shaped sound-absorbing hole array is embedded inside, which can effectively reduce mechanical transmission noise.

[0044] A fixed housing 12 is disposed around the circumferential side of the lifting housing 11. The top of the fixed housing 12 is provided with a movable opening, and the lifting housing 11 is vertically movable and disposed within the movable opening. The fixed housing 12 restricts the movement range of the lifting housing 11 through the movable opening at the top, preventing the housing from shifting or shaking during the lifting process; the circumferential surrounding design further isolates mechanical noise and avoids accidental contact of patients or doctors with moving parts, improving safety. Further, an elastic silicone sealing strip is implanted in the gap between the lifting housing 11 and the fixed housing 12. Its cross-section is wavy to adapt to the arc-shaped movement track, forming a dynamic airtight barrier to effectively block the intrusion of particulate matter with a diameter greater than 0.1 mm. Preferably, a polyurethane guide roller group is added at the movable opening at the top of the fixed housing 12, and the surface of the roller is coated with a self-lubricating coating, so that the lifting housing 11 forms a rolling friction with the roller during movement. Compared with the traditional sliding contact mode, the wear rate is effectively reduced, and there is no need to add lubricating oil regularly, avoiding pollution of the consulting room environment.

[0045] Optionally, the inclination angle of the hydraulic cylinder 51 is 20 - 60°. By limiting the inclination angle of the hydraulic cylinder 51 to 20 - 60°, the balance between space occupation and driving force efficiency is optimized through experiments to meet the requirements of different scenarios. In this embodiment, by limiting the inclination angle of the hydraulic cylinder 51 to 60°, a refined balance is achieved between the space layout and the dynamic performance, further enhancing the comprehensive efficiency of the arc-shaped lifting mechanism. At this inclination angle, the hydraulic cylinder 51 and the lifting platform 2 form a stable large-angle support structure, and its geometric relationship enables the best mechanical transmission path to be formed between the thrust direction of the push rod 52 and the swing plane of the guide bracket 3. Specifically, the 60° inclination angle significantly amplifies the lever effect, enabling the linear thrust of the driving cylinder 5 to be more efficiently converted into the arc-shaped lifting torque of the mounting bracket 4, thereby reducing the required output power of the hydraulic system. On the premise of maintaining the same lifting speed, smaller-sized hydraulic components can be selected, saving both cost and energy consumption. At the same time, this inclination angle design tilts the hydraulic cylinder 51 backward as a whole, reducing the space occupied by the equipment in the horizontal direction, especially suitable for scenarios where the depth of the operating area in the consulting room is limited, avoiding the waste of the space at the rear of the equipment caused by the vertical installation of traditional vertical cylinders.

[0046] Specifically, a plurality of mounting holes are formed on the top end surface of the mounting bracket 4, and the seat body 1 is detachably mounted on the mounting holes. Preferably, the mounting holes are mounting screw holes. The plurality of mounting screw holes at the top end of the mounting bracket 4 enable modular installation of the seat body 1 through simple threaded connection, facilitating quick replacement or adaptation to different models of seats and reducing maintenance costs. The detachable design also supports personalized configuration to meet diverse clinical needs. Through the threaded connection method, the installation process between the seat body 1 and the mounting bracket 4 becomes simple and efficient. The operator only needs to align the corresponding connecting components on the seat body 1 with the mounting screw holes at the top end of the mounting bracket 4, and then use a suitable tool (such as a screwdriver, etc.) to perform the tightening operation to complete the installation of the seat body 1. This connection method does not require complex operation procedures and professional skills, and ordinary staff can master it proficiently after simple training, greatly improving the installation efficiency.

[0047] In summary, for the dental chair with arc-shaped lifting of the present invention, the waist joint design of the trapezoidal fixed bracket 6 and the inverted trapezoidal mounting bracket 4, in cooperation with the inclined driving cylinder 5 and the multi-node articulated linkage structure, realizes the lifting of the seat body 1 along an ergonomic arc-shaped trajectory. Compared with the traditional vertical lifting mechanism, this structure significantly reduces the overall volume of the mechanism by the waist fitting of the fixed bracket 6 and the mounting bracket 4, making the lifting assembly more compact, especially suitable for the dental clinic layout with limited space. The inclined arrangement of the driving cylinder 5 and the articulated design of the push rod 52 and the guiding bracket 3 form a stable power transmission path. Through the swinging movement of the guiding bracket 3 with the top as the rotation center, the linear thrust of the cylinder is converted into the arc-shaped lifting movement of the mounting bracket 4. This movement trajectory simulates the physiological curve of the natural adjustment of the human sitting posture, avoiding the sudden change in body position caused by the traditional rigid vertical lifting, and reducing the tension of the patient due to the sudden change in the center of gravity during the lifting process, which is especially friendly to patients with sensitive lumbar vertebrae or limited mobility.

[0048] Meanwhile, the arc-shaped lifting trajectory provides doctors with a greater degree of freedom in angle adjustment. During the lifting process of the seat, the inclination angle changes synchronously, enabling doctors to obtain an operation view suitable for different diagnosis and treatment stages without frequent manual adjustment, thus improving the positioning accuracy of instruments and treatment efficiency. From a structural perspective, this design simplifies traditional transmission components such as multi-linkages and gear racks, and replaces complex mechanical linkages with a trapezoidal bracket splicing and hinged structure, significantly reducing the number of components and assembly complexity. This not only reduces manufacturing costs but also decreases the risk of failures caused by structural redundancy, enhancing the reliability of the equipment during long-term use. In addition, the inclined layout of the hydraulic drive cylinder 5 not only saves horizontal space occupancy but also optimizes the power output efficiency through the lever principle, ensuring a smooth and stable lifting process and avoiding the shaking problem caused by the high center of gravity of traditional vertical cylinders. Overall, through structural simplification and innovation of the movement trajectory, this solution achieves lightweight and low-cost while taking into account the professional requirements of medical operations and patient comfort, providing a practical technical path for the performance upgrade of oral diagnosis and treatment equipment. Therefore, the present invention effectively overcomes various drawbacks in the prior art and has high industrial utilization value.

[0049] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. An arc-shaped lifting dental chair, comprising a chair body (1), a lifting platform (2) and a lifting mechanism, characterized in that: The lifting mechanism of the seat body (1) comprises a guide bracket (3), a mounting bracket (4), a driving cylinder (5) and a trapezoidal fixed bracket (6); the mounting bracket (4) is in an inverted trapezoidal shape, and the waist of the mounting bracket (4) is spliced ​​with the waist of the fixed bracket (6); the driving cylinder (5) comprises a hydraulic cylinder (51) and a push rod (52) movably arranged in the hydraulic cylinder (51), the top of the push rod (52) is hinged to the bottom of the guide bracket (3), the bottom of the hydraulic cylinder (51) is hinged to the bottom plate of the fixed bracket (6), the left side of the guide bracket (3) is hinged to the bottom end of the mounting bracket (4), the right side of the guide bracket (3) is hinged to the top of the fixed bracket (6), the hydraulic cylinder (51) is tilted toward one side of the guide bracket (3), the fixed bracket (6) is fixed on the lifting platform (2), and the seat body (1) is installed on the mounting bracket (4).

2. The arc-shaped lifting dental chair according to claim 1, characterized in that: It also includes a connecting rod bracket (7) with an annular structure, wherein the connecting rod bracket (7) includes a connecting plate (71), a first connecting rod (72) and a second connecting rod (73), wherein the first connecting rod (72) and the second connecting rod (73) are connected to each other through the connecting plate (71) and form a ring shape, wherein the first connecting rod (72) is hinged to the mounting bracket (4), and the second connecting rod (73) is hinged to the fixing bracket (6).

3. The arc-shaped lifting dental chair according to claim 1, characterized in that: The cross section of the guide bracket (3) is triangular, the push rod (52) is hinged at the center of the guide bracket (3), and the left and right sides are respectively hinged to the mounting bracket (4) and the fixing bracket (6).

4. The arc-shaped lifting dental chair according to claim 3, characterized in that: It also includes a telescopic pull rod (8), the top of the telescopic pull rod (8) is hinged to the guide bracket (3), and the bottom is hinged and fixed to the fixed bracket (6), and the telescopic pull rod (8) is arranged in parallel with the driving cylinder (5).

5. The arc-shaped lifting dental chair according to claim 4, characterized in that: A horizontally arranged hinge (9) is fixed to the bottom of the guide bracket (3), and the telescopic pull rod (8) and the push rod (52) are respectively hinged to the bottom end of the guide bracket (3) through the hinge (9).

6. The arc-shaped lifting dental chair according to claim 5, characterized in that: It also includes a supporting block (10), which is fixed at the center of the guide bracket (3), and the supporting block (10) is located on the extension line of the push rod (52) and is supported on the top end of the hinge (9).

7. The arc-shaped lifting dental chair according to claim 1, characterized in that: It also comprises an arc-shaped lifting shell (11), wherein the arc-shaped side surface of the lifting shell (11) is close to a side of the guide bracket (3) facing away from the fixed bracket (6).

8. The arc-shaped lifting dental chair according to claim 7, characterized in that: A fixed shell (12) is arranged around the circumference of the lifting shell (11), and a movable opening is arranged on the top of the fixed shell (12). The lifting shell (11) can be lifted and lowered in the movable opening.

9. The arc-shaped lifting dental chair according to claim 1, characterized in that: The inclination angle of the hydraulic cylinder (51) is 20-60°.

10. The arc-shaped lifting dental chair according to claim 1, characterized in that: A plurality of mounting holes are provided on the top end surface of the mounting bracket (4), and the seat body (1) can be detachably mounted on the mounting holes.

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