Ophthalmic multi-purpose ophthalmic examination device

Abstract

The application relates to the technical field of medical auxiliary devices, in particular to a multi-purpose ophthalmic examination device for ophthalmology, which comprises a fixed base, a head supporting mechanism movably arranged on the fixed base, the head supporting mechanism comprising a lower supporting assembly and an upper supporting assembly for positioning the lower jaw and the forehead of a patient respectively, an adjusting frame movably connected to the upper supporting assembly, two positioning frames corresponding to the eyes movably arranged on the adjusting frame, and a lid opening module arranged in the positioning frame for assisting the patient in opening the eyelids; a detection mechanism movably arranged on the fixed base, the detection mechanism being located on the side of the eye positioning mechanism away from the head supporting mechanism, and being used for checking the eye parameters of the patient. The head supporting mechanism realizes stable three-dimensional positioning, the double activity adjustment of the eye positioning mechanism and the active opening function of the eyelids are matched, the detection window is continuously opened, the detection alignment accuracy and the patient comfort are remarkably improved, and a reliable physical basis is provided for multi-parameter homologous measurement.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary device technology, and in particular to a multi-purpose ophthalmic examination device. Background Technology

[0002] In the existing ophthalmology diagnosis and treatment system, the acquisition of different parameters usually relies on multiple independent devices to complete the process separately. Patients need to move back and forth between different examination rooms, change positions multiple times, and undergo one-by-one examinations using devices such as computer refractionators, corneal topography machines, non-contact tonometers, slit-lamp microscopes, and fundus photography. This process is not only time-consuming and increases patient fatigue and discomfort, but also, due to the differences in the detection principles, coordinate systems, and measurement times of each device, the data lacks commonality, making it difficult to achieve cross-validation of multiple parameters and affecting the accuracy and efficiency of clinical interpretation.

[0003] While some existing devices attempt to integrate two or three functions, such as corneal topometry systems or anterior segment analysis systems with refractive modules, significant limitations remain: First, integration is limited, failing to cover the core examination chain from the anterior segment to the fundus, and from morphology to function. Preoperative refraction and aberration analysis often require additional modules, complicating operation. Second, most combined devices are "piecemeal" integrations, with independent optical paths and different timing sequences for each measurement unit. Switching probes or adjusting patient alignment during measurement leads to inconsistent measurement points and poor data comparability. Third, for diseases requiring multi-indicator interpretation, such as cataracts, keratoconus, and glaucoma, existing devices lack mechanisms for cross-verification of source data, easily leading to missed or misdiagnosed cases due to cumulative measurement errors. Furthermore, existing devices generally lack systematic consideration for patient comfort. Frequent air puffing, strong light stimulation, and prolonged fixation during measurement reduce the cooperation of special populations such as children and the elderly.

[0004] Therefore, developing a multi-purpose ophthalmic examination device that can achieve simultaneous measurement of multiple parameters from the same source and with cross-validated data has become a pressing technical challenge in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-purpose ophthalmic examination device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a multi-purpose ophthalmic examination device, comprising: A fixed base, which is fixed to the tabletop; A head support mechanism, comprising a lower support assembly movably mounted on the fixed base, an upper support assembly movably mounted at the top of the lower support assembly, the user's chin resting on the lower support assembly, and the upper support assembly positioned on the patient's forehead; An eye positioning mechanism includes an adjustment frame movably connected to the upper support assembly. Two corresponding positioning frames corresponding to the eyes are movably arranged on the adjustment frame. An opening module for assisting the patient to open the eyelids is provided in the positioning frame. The testing mechanism is movably mounted on the fixed base and located on the side of the eye positioning mechanism away from the head support mechanism, and is used to examine the patient's eye parameters.

[0007] Preferably, the lower support assembly includes a lower support frame slidably disposed on the fixed base, the bottom end of the lower support frame being connected to a first drive module disposed in the fixed base; the lower support frame is provided with an arc-shaped placement groove, and a flexible support pad for supporting the user's chin is provided at the bottom end of the placement groove; the upper support assembly is provided at the top end of the lower support frame.

[0008] Preferably, the first drive module includes a first guide groove formed on the fixed base, a first drive rod rotatably connected in the first guide groove, and the first drive rod being drive-connected to a first operating lever rotatably connected to the fixed base; the bottom end of the lower support frame is slidably connected in the first guide groove and drive-connected to the first drive rod.

[0009] Preferably, the upper support assembly includes two symmetrically raised and lowered support rods mounted on the top of the lower support frame. The top of each raised and lowered support rod is provided with a raised and lowered support column. A support beam is fixed between the two raised and lowered support columns. An arc-shaped support groove on the support beam abuts against the patient's forehead. The adjustment frame is slidably connected to the support beam.

[0010] Preferably, an active lifting screw is rotatably connected to the lower support frame, and the active lifting screw is threadedly connected to two synchronously arranged passive lifting screws. The passive lifting screws are correspondingly arranged with the lifting support rod and are threadedly driven, and the passive lifting screws drive the lifting support rod to move up and down.

[0011] Preferably, an adjustment knob is rotatably connected to the support beam. The adjustment knob extends into the adjustment frame and is connected to a first drive gear and a second drive gear. The first drive gear meshes with an adjustment rack disposed in the adjustment frame to drive the adjustment frame closer to or further away from the patient's eye.

[0012] Preferably, an adjusting screw is movably disposed within the adjusting frame, the middle part of the adjusting screw meshes with the second driving gear for transmission, the adjusting screw meshes with an adjusting block slidably connected within the adjusting frame for transmission, an adjusting rod is slidably connected to the adjusting block, and the adjusting rod is fixedly connected to the top end of the positioning frame for adjusting the distance between the two positioning frames.

[0013] Preferably, the adjustment knob is provided with a first action section and a second action section, the first action section and the second action section are located in the adjustment frame, the first action section is detachably connected to the first drive gear, the second action section is detachably connected to the second drive gear, and the first drive gear and the second drive gear are not simultaneously connected to the adjustment knob for transmission.

[0014] Preferably, the opening module is a flexible opening plate arranged vertically and vertically, with a gap between the two flexible opening plates and the gap is adjustable. The flexible opening plate extends out of the positioning frame and abuts against the upper and lower sides of the patient's eye socket respectively, in order to assist in opening the patient's eyelids.

[0015] Preferably, the detection mechanism includes a detection lifting rod slidably connected to the fixed base, and the top end of the detection lifting rod is provided with a detection device for detecting the patient's eye parameters, and the detection device is correspondingly set with the positioning frame.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention discloses a multi-purpose ophthalmic examination device. Through the synergistic effect of the head support mechanism, the eye positioning mechanism and the adjustable detection mechanism, a complete physical link from head fixation, eyelid opening to detection alignment is realized on a single device. This effectively replaces the cumbersome process of multiple independent devices performing separate tests in the prior art. It fundamentally solves the problem of lack of data homogeneity caused by different coordinate systems and measurement time differences between multiple devices, ensuring that all parameters are acquired synchronously under the same head posture and eye state, making the data mutually verifiable, reducing cumulative errors, simplifying operation steps, shortening examination time, and improving patient comfort and clinical diagnostic efficiency. The fixed base serves as a foundation, securing the device to a table or floor for stable support. A head support mechanism is movably mounted on the fixed base, comprising a lower support component and an upper support component movably connected to its top. During use, the relationship between the upper and lower supports can be flexibly adjusted according to the patient's head and face shape, ensuring the patient's chin rests against the lower support component and the forehead is positioned on the upper support component. This flexibility and convenience resolves the fatigue and discomfort caused by repeated changes in patient position between different devices, significantly improving the stability and comfort of head support and creating a durable, fixed foundation for multi-parameter homologous measurements. An adjustment frame is movably connected to the upper support component, and two corresponding eyes are movably mounted on the adjustment frame. The positioning frame of the eye is designed to precisely adapt to the interocular distance and detection angle of different patients through the dual movement of the adjustment frame and the positioning frame. An opening module is also included within the positioning frame to assist patients in opening their eyelids. This effectively overcomes the shortcomings of frequent airflow, strong light stimulation, and prolonged fixation requirements that could cause patients to blink or have their eyelids obstruct the measurement, thus ensuring a continuously open detection window and avoiding data loss or errors due to eyelid interference. The detection mechanism is mounted on a fixed base and located on the side of the eye positioning mechanism away from the head support mechanism. This allows the detection mechanism to flexibly adjust its detection position and angle on a stable base, enabling targeted examination of different patients' eye parameters. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is an axial view of the multi-purpose ophthalmic examination device of the present invention; Figure 2 This is a side view of the multi-purpose ophthalmic examination device of the present invention; Figure 3 This is a schematic diagram of the fixed base structure of the present invention; Figure 4 This is a schematic diagram of the lower support frame of the present invention; Figure 5 This is a schematic diagram of the adjusting screw structure of the present invention; Figure 6 This is a schematic diagram of the adjustment knob structure of the present invention; Figure 7 This is a schematic diagram of the fixing component structure in Embodiment 2 of the present invention; In the diagram: 1. Fixed base; 2. Head support mechanism; 3. Eye positioning mechanism; 4. Detection mechanism; 11. First guide groove; 12. Second guide groove; 13. First drive rod; 14. First control lever; 15. Support foot; 16. Retrieval groove; 17. Fixed suction cup; 18. Retrieval rod; 19. Upper positioning plate; 110. Lower positioning plate; 111. Air duct; 112. First air duct; 113. Second air duct; 114. Sealing slip ring; 21. Lower support frame; 22. Placement groove; 23. Flexible support pad; 24. Lifting support rod; 25. Lifting support 26. Column; 27. Support beam; 28. Arc-shaped support groove; 29. ​​Active lifting screw; 30. Passive lifting screw; 31. Adjusting frame; 32. Positioning frame; 33. Adjusting knob; 34. First driving gear; 35. Second driving gear; 36. Adjusting rack; 37. Adjusting screw; 38. Adjusting gear; 39. Adjusting block; 310. Adjusting rod; 311. First working section; 312. Second working section; 313. First force-bearing hole; 314. Second force-bearing hole; 315. Flexible spreading plate; 316. Spreading screw; 41. Detection lifting rod; 42. Detection equipment. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more readily understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 Reference Figures 1 to 6 As shown, this embodiment provides a multi-purpose ophthalmic examination device, including: Fixed base 1, fixed base 1 is fixed to the table; The head support mechanism 2 includes a lower support component movably mounted on a fixed base 1, an upper support component movably mounted on the top of the lower support component, the user's chin resting on the lower support component, and the upper support component positioned on the patient's forehead. The eye positioning mechanism 3 includes an adjustment frame 31 movably connected to the upper support component. Two corresponding positioning frames 32 are movably set on the adjustment frame 31, and an opening module for assisting the patient to open the eyelids is set inside the positioning frame 32. The testing mechanism 4 is movably mounted on the fixed base 1 and located on the side of the eye positioning mechanism 3 away from the head support mechanism 2, and is used to examine the patient's eye parameters.

[0021] This invention discloses a multi-purpose ophthalmic examination device. Through the synergistic action of the head support mechanism 2, the eye positioning mechanism 3, and the adjustable detection mechanism 4, a complete physical link from head fixation and eyelid opening to detection alignment is realized on a single device. This effectively replaces the cumbersome process of multiple independent devices performing separate tests in the prior art. It fundamentally solves the problem of data lack of commonality caused by different coordinate systems and measurement time differences between multiple devices, ensuring that all parameters are acquired synchronously under the same head posture and eye state, making the data mutually verifiable, reducing cumulative errors, simplifying operation steps, shortening examination time, and improving patient comfort and clinical diagnostic efficiency. The fixed base 1 serves as a foundation, fixed to a table or the ground, providing stable support for the entire device. A head support mechanism 2 is movably mounted on the fixed base 1, including a lower support component and an upper support component movably connected to its top. During use, the relationship between the upper and lower supports can be flexibly adjusted according to the patient's head and face shape, allowing the patient's chin to rest against the lower support component and the forehead to be positioned on the upper support component. This flexibility and convenience solves the problem of fatigue and discomfort caused by repeated changes in position between different devices, significantly improving the stability and comfort of head support and creating a durable, fixed foundation for multi-parameter homogeneous measurements. An adjustment frame 31 is movably connected to the upper support component, and two corresponding eye-mounted supports are movably mounted on the adjustment frame 31. The positioning frame 32, through the dual movement of the adjustment frame 31 and the positioning frame 32, precisely adapts to the interocular distance and detection angle of different patients. An opening module is set in the positioning frame 32 to assist patients in opening their eyelids, effectively overcoming the defects of frequent air jets, strong light stimulation, and long-term fixation requirements that cause patients to blink or their eyelids to block the measurement, ensuring a continuously open detection window and avoiding data loss or errors caused by eyelid interference. The detection mechanism 4 is movably set on the fixed base 1 and located on the side of the eye positioning mechanism 3 away from the head support mechanism 2, so that the detection mechanism 4 can flexibly adjust the detection position and angle on the stable base to perform targeted examinations of eye parameters for different patients.

[0022] In one embodiment of the present invention, the bottom end of the fixed base 1 is provided with a plurality of support feet 15, so that the fixed base 1 is supported on the ground.

[0023] In one embodiment of the present invention, the bottom end of the support foot 15 is provided with an anti-slip pad, which further improves the stability of the device.

[0024] The design is further optimized. The lower support component includes a lower support frame 21 slidably mounted on a fixed base 1. The bottom end of the lower support frame 21 is connected to a first drive module mounted in the fixed base 1. The lower support frame 21 has an arc-shaped placement groove 22, and a flexible support pad 23 for supporting the user's chin is raised and lowered at the bottom end of the placement groove 22. The upper support component is raised and lowered at the top of the lower support frame 21. The lower support frame is slidably mounted on the fixed base and driven by the first drive module, allowing for sliding adjustment of its front and rear positions to adapt to different patients. The arc-shaped placement groove 22 adapts to the patient's face shape, and the flexible support pad 23 is located at the center of the bottom end of the placement groove 22 and can be raised and lowered to support the patient's chin position. It can also be raised and lowered as needed to adjust the patient's head position. The upper support component is raised and lowered at the top of the lower support frame to position the patient's head. The combination of multiple components achieves three-dimensional adjustable positioning of the chin and forehead, enabling positioning of the eyes of different patients, enhancing the personalized adaptability of head support, avoiding discomfort caused by fixed postures, and improving patient cooperation during long-term testing.

[0025] Further optimizing the design, the first drive module includes a first guide groove 11 formed on the fixed base 1, a first drive rod 13 rotatably connected within the first guide groove 11, and a first operating lever 14 rotatably connected to the fixed base 1. The bottom end of the lower support frame 21 is slidably connected in the first guide groove 11 and rotatably connected to the first drive rod 13. Two legs at the bottom end of the lower support frame 21 slide in the two first guide grooves 11 to limit the movement of the lower support frame 21 and improve its stability. During operation, rotating the first operating lever 14 drives the two first drive rods 13 to rotate, thereby moving the lower support frame threadedly connected to the first drive rods 13 back and forth in the first guide groove. This design is suitable for patients of different body types, allowing any patient to comfortably use the device.

[0026] In one embodiment of the present invention, a baffle plate is provided on the outer wall of the lower support frame 21. The baffle plate can block the first guide groove 11 to prevent foreign objects from entering the first guide groove 11 and improve protection.

[0027] The design is further optimized. The upper support assembly includes two symmetrically positioned lifting support rods 24 at the top of the lower support frame 21. Each lifting support rod 24 has a lifting support column 25 at its top. A support beam 26 is fixedly connected between the two lifting support columns 25. An arc-shaped support groove 27 on the support beam 26 abuts against the patient's forehead. An adjustment frame 31 is slidably connected to the support beam 26. The two lifting support rods 24 are symmetrically positioned at the top of the lower support frame 21 and can be raised and lowered, thereby adjusting the position of the support beam 26 fixed between the two lifting support columns 25. This allows the arc-shaped support groove 27 on the support beam 26 to abut and position against the patient's forehead, thus positioning the positioning frame 32 towards the patient's eyes, providing positioning accuracy for patients with different face shapes.

[0028] The design is further optimized by incorporating an active lifting screw 28 rotatably connected to the lower support frame 21. This active lifting screw 28 is threadedly connected to two synchronously arranged passive lifting screws 29. The passive lifting screws 29 are correspondingly arranged and threadedly connected to the lifting support rod 24, driving the lifting support rod 24 to move up and down. The active lifting screw 28 traverses the lower support frame 21, enabling the two passive lifting screws 29 to rotate synchronously. The passive lifting screws 29 are inserted into and threadedly connected to the bottom end of the lifting support rod 24. When the passive lifting screws 29 rotate, they drive the lifting support rod 24 to slide and move up and down at the top of the lower support frame 21, thereby causing the entire upper support assembly to move horizontally. This achieves accurate positioning of the patient's forehead, preventing tilting that could cause head sway and improving the consistency of bilateral eye examinations.

[0029] In one embodiment of the present invention, in order to improve the automation level of the device, the active lifting screw 28 may be automatically driven by a servo motor.

[0030] In a further optimized design, an adjustment knob 33 is rotatably connected to the supporting beam 26. The adjustment knob 33 extends into the adjustment frame 31 and is connected to a first drive gear 34 and a second drive gear 35. The first drive gear 34 meshes with an adjustment rack 36 located in the adjustment frame 31, driving the adjustment frame 31 closer to or further away from the patient's eye. The rotating shaft at the bottom of the adjustment knob 33 passes through the supporting beam 26 and extends into the adjustment frame 31. The first drive gear 34 drives the adjustment rack 36 to translate, thereby causing the adjustment frame 31, which is fixed to the adjustment rack 36, to translate and adjust the distance between itself and the patient's eye. The middle part of the adjustment screw 37 meshes with the second drive gear 35, and the adjustment screw 37 meshes with an adjustment block 39 slidably connected in the adjustment frame 31. An adjustment rod 310 is slidably connected to the adjustment block 39, and the adjustment rod 310 is fixed to the top of the positioning frame 32, used to adjust the distance between the two positioning frames 32 to accommodate patients with different pupillary distances.

[0031] In a further optimized design, an adjusting screw 37 is movably mounted within the adjusting frame 31. The middle of the adjusting screw 37 meshes with the second driving gear 35 for transmission. The adjusting screw 37 also meshes with an adjusting block 39 slidably connected within the adjusting frame 31. An adjusting rod 310 is slidably connected to the adjusting block 39 and fixed to the top of the positioning frame 32 for adjusting the distance between the two positioning frames 32. The adjusting screw 37 is positioned within the adjusting frame 31 and aligned with the supporting beam 26. An adjusting gear 38 corresponding to the second driving gear 35 is mounted on the adjusting screw 37. This ensures that when the adjusting frame 31 moves horizontally, the position of the adjusting screw 37 remains unchanged relative to the supporting beam 26. When the adjusting screw 37 rotates, the adjusting block 39 moves horizontally at both ends of the adjusting screw 37, and the vertically mounted adjusting rod 310 then adjusts the distance between the two positioning frames 32.

[0032] Further optimization involves an adjustment knob 33 equipped with a first actuating section 311 and a second actuating section 312, located within the adjustment frame 31. The first actuating section 311 is detachably connected to the first driving gear 34, and the second actuating section 312 is detachably connected to the second driving gear 35. The first driving gear 34 and the second driving gear 35 are not simultaneously connected to the adjustment knob 33 for transmission, accommodating different pupillary distances. The first actuating section 311 and the second actuating section 312 are arranged longitudinally, with only one section transmitting power to its corresponding gear at a time. This allows for switching between different motion states by moving the adjustment knob 33 up and down, simplifying the operating components, reducing the risk of misoperation, lowering manufacturing costs, and improving the intuitiveness and reliability of the adjustment.

[0033] In one embodiment of the present invention, the first driving gear 34 is provided with a first force-receiving hole 313 that is adapted to the first action section 311. When the first action section 311 is engaged in the first force-receiving hole 313, the first driving gear 34 can be driven.

[0034] In one embodiment of the present invention, the second driving gear 35 is provided with a second force-receiving hole 314 that is adapted to the second action section 312. When the second action section 312 is engaged in the second force-receiving hole 314, the second driving gear 35 can be driven.

[0035] The design has been further optimized. The opening module consists of two corresponding flexible opening plates 315, with an adjustable gap between them. The flexible opening plates 315 extend from the positioning frame 32 and abut against the upper and lower sides of the patient's eye socket, respectively, to assist in opening the patient's eyelids. The two flexible opening plates 315 are arc-shaped and their gap is adjustable. By adjusting the gap between the two flexible plates, the upper and lower eyelids are gently opened, avoiding damage from hard contact. This achieves non-invasive and comfortable eyelid fixation, effectively preventing blinking interference, and is especially suitable for children and sensitive individuals, ensuring continuous testing.

[0036] In one embodiment of the present invention, a longitudinally arranged expansion screw 316 is provided in the positioning frame 32. When it rotates, it can drive two flexible expansion plates 315 to move up and down, thereby assisting the patient to keep their eyes open through external force, which facilitates examination.

[0037] To further optimize the design, the detection mechanism 4 includes a detection lifting rod 41 slidably connected to the fixed base 1. A detection device 42 for detecting patient eye parameters is mounted at the top of the detection lifting rod 41, and the detection device 42 is correspondingly positioned with the positioning frame 32. The detection lifting rod 41 is slidably connected to the second guide groove 12 of the fixed base 1, which allows the detection lifting rod 41 to move closer to or further away from the positioning frame 32. Simultaneously, the lifting motion of the detection lifting rod 41 ensures that the detection device 42 is accurately aligned with the opened eye, guaranteeing that the detection optical path remains coaxially aligned with the eye, thus improving the repeatability and accuracy of multi-parameter measurements.

[0038] In one embodiment of the present invention, the detection device 42 may also be replaced with other auxiliary devices, such as spraying devices, treatment devices, etc. Those skilled in the art can make replacements according to work requirements, which will not be elaborated here.

[0039] Example 2 See attached document Figure 7 As shown, compared with Embodiment 1, this embodiment replaces the fixed support foot 15 with a liftable fixing component, which further improves the stability of the fixing, avoids shaking during use, and improves safety.

[0040] The fixing component includes a recycling slot 16 at the bottom of the fixing base 1. A fixing suction cup 17 is installed in the recycling slot 16 via a recycling rod 18. When fixing is required, the recycling rod 18 drives the fixing suction cup 17 to extend out of the recycling slot 16 and adhere to the tabletop to improve stability. When moving is required, the recycling rod 18 drives the fixing suction cup 17 to rise and retract into the recycling slot 16 for easy movement.

[0041] A sealing slip ring 114 is provided at the center of the top of the fixed suction cup 17, and the sealing slip ring 114 is slidably connected to a specific section of the recovery rod 18; at the same time, an air guide channel 111 is provided in the recovery rod 18, and the air guide channel 111 is provided with a first air guide hole 112 and a second air guide hole 113. The longitudinal distance between the second air guide hole 113 and the first air guide hole 112 is greater than the thickness of the sealing slip ring; when fixing, the recovery rod 18 moves into the inner cavity of the fixed suction cup 17, at which time the bottom end of the fixed suction cup 17 contacts the table, and the second air guide... Both hole 113 and the first air guide hole 112 are located inside the fixed suction cup 17, isolating the inside of the fixed suction cup 17 from the outside. At this time, air can be drawn out through the air guide channel 111 to achieve negative pressure adsorption of the fixed suction cup 17. When it needs to be moved, the recovery rod 18 is raised, and the second air guide hole 113 and the first air guide hole 112 are raised. The first air guide hole 112 at the upper end moves out of the fixed suction cup 17, while the second air guide hole 113 is located inside the fixed suction cup 17, so that the inside and outside of the fixed suction cup 17 are connected, making it convenient for the fixed suction cup 17 to be separated.

[0042] The retrieval rod 18 is provided with an upper positioning plate 19 and a lower positioning plate 110. The upper positioning plate 19 and the lower positioning plate 110 serve as limiting mechanisms for the relative movement of the retrieval rod 18 and the sealing slip ring 114, and are used to limit the movement distance between the retrieval rod 18 and the fixed suction cup 17. When the upper positioning plate 19 contacts the top surface of the sealing slip ring 114, it applies pressure to the fixed suction cup 17 to make the fixed suction cup 17 firmly fixed. When the lower positioning plate 110 contacts the bottom surface of the sealing slip ring 114, it can apply an upward force to the fixed suction cup 17 to separate the fixed suction cup 17 from the table.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-purpose ophthalmic examination device, characterized in that, include: A fixed base (1) is fixed on a tabletop; The head support mechanism (2) includes a lower support component movably mounted on the fixed base (1), an upper support component movably mounted at the top of the lower support component, the user's chin resting on the lower support component, and the upper support component positioned on the patient's forehead. An eye positioning mechanism (3) includes an adjustment frame (31) movably connected to the upper support assembly. Two corresponding positioning frames (32) corresponding to the eyes are movably arranged on the adjustment frame (31). An opening module for assisting the patient to open the eyelids is provided in the positioning frame (32). The detection mechanism (4) is movably mounted on the fixed base (1) and located on the side of the eye positioning mechanism (3) away from the head support mechanism (2), and is used to examine the patient's eye parameters.

2. The multi-purpose ophthalmic examination device according to claim 1, characterized in that: The lower support assembly includes a lower support frame (21) slidably disposed on the fixed base (1), the bottom end of the lower support frame (21) being connected to a first drive module disposed in the fixed base (1); an arc-shaped placement groove (22) is provided on the lower support frame (21), and a flexible support pad (23) for supporting the user's chin is provided at the bottom end of the placement groove (22); the upper support assembly is provided at the top end of the lower support frame (21).

3. The multi-purpose ophthalmic examination device according to claim 2, characterized in that: The first drive module includes a first guide groove (11) formed on the fixed base (1), a first drive rod (13) is rotatably connected in the first guide groove (11), and the first drive rod (13) is pulsatorically connected to a first operating lever (14) rotatably connected to the fixed base (1); the bottom end of the lower support frame (21) is slidably connected in the first guide groove (11) and pulsatorically connected to the first drive rod (13).

4. The multi-purpose ophthalmic examination device according to claim 2, characterized in that: The upper support assembly includes two symmetrically raised and lowered support rods (24) at the top of the lower support frame (21). The top of the raised and lowered support rods (24) is provided with a raised and lowered support column (25). A support beam (26) is fixed between the two raised and lowered support columns (25). An arc-shaped support groove (27) provided on the support beam (26) abuts against the patient's forehead. The adjustment frame (31) is slidably connected to the support beam (26).

5. The multi-purpose ophthalmic examination device according to claim 4, characterized in that: An active lifting screw (28) is rotatably connected to the lower support frame (21). The active lifting screw (28) is threadedly connected to two synchronously arranged passive lifting screws (29). The passive lifting screws (29) are correspondingly arranged with the lifting support rod (24) and threadedly driven. The passive lifting screws (29) drive the lifting support rod (24) to move up and down.

6. The multi-purpose ophthalmic examination device according to claim 5, characterized in that: An adjustment knob (33) is rotatably connected to the support beam (26). The adjustment knob (33) extends into the adjustment frame (31) and is connected to a first drive gear (34) and a second drive gear (35). The first drive gear (34) meshes with the adjustment rack (36) in the adjustment frame (31) to drive the adjustment frame (31) closer to or away from the patient's eye.

7. The multi-purpose ophthalmic examination device according to claim 6, characterized in that: An adjusting screw (37) is movably disposed inside the adjusting frame (31). The middle part of the adjusting screw (37) meshes with the second driving gear (35) for transmission. The adjusting screw (37) meshes with the adjusting block (39) slidably connected inside the adjusting frame (31). An adjusting rod (310) is slidably connected to the adjusting block (39). The adjusting rod (310) is fixedly connected to the top of the positioning frame (32) for adjusting the distance between the two positioning frames (32).

8. The multi-purpose ophthalmic examination device according to claim 7, characterized in that: The adjustment knob (33) is provided with a first action section (311) and a second action section (312). The first action section (311) and the second action section (312) are located in the adjustment frame (31). The first action section (311) is detachably connected to the first drive gear (34), and the second action section (312) is detachably connected to the second drive gear (35). The first drive gear (34) and the second drive gear (35) are not simultaneously connected to the adjustment knob (33) for transmission.

9. The multi-purpose ophthalmic examination device according to claim 1, characterized in that: The opening module consists of flexible opening plates (315) arranged vertically and vertically. The two flexible opening plates (315) are spaced apart and the spacing is adjustable. The flexible opening plates (315) extend out of the positioning frame (32) and respectively abut against the upper and lower sides of the patient's eye socket to help open the patient's eyelids.

10. The multi-purpose ophthalmic examination device according to claim 1, characterized in that: The detection mechanism (4) includes a detection lifting rod (41) slidably connected to the fixed base (1). The top of the detection lifting rod (41) is provided with a detection device (42) for detecting the patient's eye parameters. The detection device (42) is correspondingly set with the positioning frame (32).

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