An ophthalmic care ocular examination device

Abstract

The application discloses an eye examination device for ophthalmic nursing, and belongs to the technical field of eye examination, which comprises a base, a supporting structure for supporting the lower jaw of a patient is arranged on the base, a pupil distance adjusting component and two groups of left-right symmetrical eye expanding mechanisms are arranged on the base, the pupil distance adjusting component drives the two groups of eye expanding mechanisms to move horizontally and synchronously, and the pupil distance adjusting component is adapted to the pupil distance of the eyes of the patient; each group of eye expanding mechanisms comprises a horizontally arranged examination cylinder, and a convex lens is arranged at the front end of the examination cylinder, compared with the prior art, the application has the following beneficial effects: through cooperation of the pupil distance adjusting component and the linkage limiting structure, pupil distance adjustment and head limiting are synchronously completed, additional calibration is not needed, and operation efficiency is greatly improved; the eye expanding mechanism is driven by a single group to synchronously and equally open the bilateral eyelids, the compatibility problem of pupil distance adjustment and eyelid opening transmission is solved through combination of the worm and the worm gear self-locking and the elastic fitting design, rigid contact damage is avoided, the eyelid margin is prevented from slipping, and the application is adapted to the clinical efficient diagnosis and treatment demand.

Description

Technical Field

[0001] This invention relates to the field of eye examination technology, specifically to an eye examination device for ophthalmic care. Background Technology

[0002] Ophthalmological examinations are a core component of ophthalmic nursing care, including screening for eye diseases, treatment of dry eye, and postoperative follow-up. This process relies heavily on the optical imaging path constructed by the convex lens within the examination device. Only when the patient's pupil is precisely coaxially aligned with the convex lens can clear images of the ocular surface and anterior segment structures be achieved. This is a crucial prerequisite for ensuring accurate examination results and efficient treatment procedures. Ophthalmic nursing examination devices are essential core equipment for routine eye examinations in hospital ophthalmology clinics, community health service centers, and primary healthcare institutions.

[0003] Existing ophthalmic examination devices generally employ independent designs for eyelid opening and pupillary distance adjustment, resulting in inherent defects that are difficult to reconcile. On the one hand, most eyelid opening mechanisms use a single-eye independent drive or a unilateral drive structure, making it difficult to achieve simultaneous and equal-amplitude opening of both eyelids. This easily leads to uneven opening force and inconsistent amplitude on both sides, which not only exacerbates patient discomfort but also directly compromises the accuracy of examination results. Furthermore, the eyelid opening transmission structure and pupillary distance adjustment structure have poor compatibility. Adjusting the distance between the examination mechanisms to accommodate different patients' pupillary distances directly disrupts the synchronicity of the eyelid opening transmission. Existing designs cannot simultaneously meet the two core requirements of adjustable pupillary distance and simultaneous bilateral eyelid opening, forcing doctors to repeatedly calibrate and align, significantly lengthening the examination preparation cycle. This results in extremely poor adaptability and makes it difficult to meet the fast-paced clinical needs of ophthalmic examinations and nursing care.

[0004] Therefore, this application proposes an eye examination device for ophthalmic care to solve the above problems. Summary of the Invention

[0005] Based on the aforementioned problems in the prior art, the problem to be solved by the present invention is to provide an eye examination device for ophthalmic care, thereby solving the problems mentioned in the background art.

[0006] The technical solution adopted by this invention to solve its technical problem is: An ophthalmic examination device for ophthalmic care includes a base, which can be fixed to a medical examination frame by screws or other fasteners. The base is provided with a support structure to support the patient's chin. The base is provided with a pupil distance adjustment component and two sets of left-right symmetrical eye-dilation mechanisms. The pupil distance adjustment component drives the two sets of eye-dilation mechanisms to move horizontally and synchronously to adapt to the patient's pupil distance. Each eye-expanding mechanism includes a horizontally positioned examination cylinder with a convex lens mounted at the front end and two sets of upper and lower eyelid retractors at the rear end. An eyelid-expanding rod is located on the front side of each eyelid retractor, with meshing gears fixed to the ends of the rods on the same side. An elastic fitting component is provided between the eyelid retractors and the examination cylinder, using elasticity to ensure the eyelid retractors adhere tightly to the eyelids and prevent slippage. A synchronous eye-expanding drive component is provided between the two eye-expanding mechanisms, synchronously driving the gears on both sides to rotate, achieving simultaneous and equal-amplitude expansion of both eyelids. The eye-dilation mechanism has a linkage limiting structure on the side that is far away from each other. The linkage limiting structure moves synchronously with the examination tube on the same side to limit the left and right movement of the patient's head.

[0007] Furthermore, the interpupillary distance adjustment component includes a hollow plate fixed on the base. A bidirectional lead screw is rotatably connected inside the hollow plate. The left and right sections of the bidirectional lead screw have opposite thread directions and are respectively threaded to a drive rod. The top of the drive rod is rigidly fixed to the bottom of the inspection cylinder on the same side. An inner guide rod is also fixed inside the hollow plate. The drive rod and the inner guide rod are slidably engaged. A linkage rod is fixed on one side of the drive rod. An outer guide rod is slidably engaged at the lower end of the linkage rod. The two sides of the outer guide rod are respectively fixedly connected to the base through fixing blocks.

[0008] Furthermore, the synchronous eyelid-expanding drive assembly includes a rotating rod rotatably connected to the upper part of the hollow plate. A first worm gear is fixedly connected to the middle of the rotating rod, and a first worm is meshed below the first worm gear. A set of linkage boxes are respectively provided on the upper part of the hollow plate. The two sides of the bidirectional lead screw are respectively threaded to the bottom end of the linkage box, and the lower end of the linkage box is also slidably engaged with the inner guide rod. A set of drive pulleys are respectively provided on the lower part of the linkage box. One of the gears on the same side is fixed to the driven pulley through a rotating shaft. The eyelid-expanding rod is rotatably connected to the examination cylinder through the rotating shaft. A synchronous belt is wound between the drive pulley and the driven pulley on the same side. A set of guide strips are fixedly installed on both sides of the rotating rod. The guide strips are slidably engaged with the drive pulleys. The lower part of the linkage box has a clearance opening that matches the position of the rotating rod to provide clearance space for the rotation of the rotating rod.

[0009] Furthermore, the elastic fitting component includes a squeezing rod and a spring. One end of the squeezing rod is fixedly connected to the eyelid opening piece, and the other end is slidably installed inside the eyelid expanding rod. The spring is located inside the squeezing rod, and both ends of the spring are fixedly connected to the end of the squeezing rod and the inside of the eyelid expanding rod, respectively. The elasticity of the spring provides a continuous fitting force to the eyelid opening piece.

[0010] Furthermore, an annular elastic ring is fixed to the rear opening edge of the examination tube. The elastic ring is coaxially arranged with the eyelid retractor. The eyelid retractor is an arc-shaped structure with mirror images of the upper and lower parts, and its front end and the elastic ring are both made of silicone.

[0011] Furthermore, the linkage limiting structure includes a limiting frame extending rearward along the axial direction of the examination cylinder, and the inner rear end of the limiting frame is provided with an elastic inner pad for conforming to the bony protrusion of the patient's temporal region, thereby limiting the horizontal displacement of the patient's head.

[0012] Furthermore, the linkage limiting structure also includes a spacing adjustment component, which includes an adjusting rod, a fixed frame, a guide sleeve, an adjusting screw, and a limiting plate. The fixed frame is fixed to the front end of the inspection cylinder, and the adjusting rod is disposed inside the fixed frame. A set of guide sleeves is slidably connected to the upper and lower sides of the fixed frame, and the upper and lower ends of the adjusting rod are fixedly connected to the upper and lower sets of guide sleeves, respectively. The adjusting screw is rotatably installed inside the fixed frame and threadedly engaged with the adjusting rod to drive the limiting frame to move and adjust the spacing between the limiting frame and the inspection cylinder. An adjusting knob is installed at one end of the adjusting screw, and two sets of limiting plates are provided, which are fixed at the upper and lower positions of the fixed frame, respectively, to limit the sliding position of the guide sleeves.

[0013] Furthermore, an elastic bandage assembly is provided on the rear side of the limiting frame. The elastic bandage assembly includes a wrapping frame and an elastic bandage. The wrapping frame and the elastic bandage are respectively fixed on the left and right sets of limiting frames. The elastic bandage has a hook and loop side of Velcro on both sides, wherein the hook side fits against the patient's head and is used to assist in fixing the patient's head.

[0014] Furthermore, the support structure includes an arc-shaped support plate, a guide plate, a hollow fixed plate, and a lifting drive assembly. The fixed plate is fixed to the rear end of the base, the guide plate is slidably disposed within the fixed plate, and the support plate is fixedly connected to the top of the guide plate. The lifting drive assembly includes a screw cylinder fixed below the support plate, a lifting screw threadedly connected to the bottom of the screw cylinder, a drive box fixedly connected to the base below the lifting screw, and a second worm gear and a second worm gear meshing with each other in the drive box. The second worm gear is fixedly connected to the lower end of the lifting screw, and a transmission rod is installed on one side of the second worm gear. The transmission rod rotates with the base, and one end of the transmission rod passes through one side of the base and is connected to a height adjustment knob.

[0015] Furthermore, one end of the first worm gear extends through the hollow plate and is fixed with a flare adjustment rocker, one end of the bidirectional lead screw extends through the hollow plate and is fixed with a spacing adjustment rocker, and multiple sets of fixing holes are formed on the surface of the base. Beneficial effects

[0016] The beneficial effects of this invention are: 1. This invention achieves simultaneous completion of pupil distance adjustment and head positioning adaptation through the linkage design of the pupil distance adjustment component and the linkage limiting structure. By adjusting the distance between the two sets of examination tubes to adapt to the patient's pupil distance, and at the same time limiting the temporal region on both sides of the patient, the preparation time for examination is greatly shortened, the coaxiality of the examination optical axis and the visual axis of the patient's eyeball is guaranteed, and the efficiency of examination and diagnosis is significantly improved.

[0017] 2. The eye-expanding mechanism of this invention achieves simultaneous and equal-amplitude opening of both eyelids through a single set of worm gear transmission combined with a rotating rod structure with guide strips. Simultaneously, the circumferential limiting and axial sliding cooperation design of the drive pulley and guide strips solves the compatibility problem between pupillary distance adjustment and eyelid opening transmission. Regardless of how the distance between the two sets of eye-expanding mechanisms is adjusted, the synchronicity of the eyelid opening action and the uniformity of torque transmission can be guaranteed. Furthermore, the self-locking design of the worm gear ensures that the eyelids are fixed in position after opening. Combined with the design of the elastic fitting component, a flexible fitting force is continuously provided by springs throughout the eyelid opening process. This avoids eye discomfort and iatrogenic damage caused by rigid contact, and ensures that the eyelid opening plate remains firmly attached to the eyelid margin, preventing slippage during the opening process.

[0018] 3. This invention uses a support structure to adjust the height of the support plate, providing stable support for the patient's mandible. Through the meshing transmission of a worm gear, a lifting screw rotates within a screw barrel, converting the screw drive into smooth vertical adjustment of the support plate. Simultaneously, the worm gear transmission's inherent reverse self-locking characteristic automatically locks the support plate's height after adjustment, preventing slippage and ensuring the stability and safety of the patient's support. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention in cross-section from the side; Figure 4 This is a cross-sectional view of the connection structure of the hollow plate in this invention; Figure 5 This is a schematic diagram of the structure of the linkage box in cross-section at the top of the present invention; Figure 6 This is a schematic diagram of the connection structure of the eyelid stretcher in this invention; Figure 7 for Figure 6 A schematic diagram of the side sectional structure; Figure 8 for Figure 1 A magnified structural diagram of part A; In the diagram, 1. Eye-expanding mechanism; 11. Examination cylinder; 12. Base; 13. Convex lens; 14. Eyelid retractor; 15. Eyelid expanding rod; 16. Squeezing rod; 17. Spring; 18. Rotating shaft; 19. Gear; 110. Elastic ring; 111. Driven pulley; 112. Synchronous belt; 113. Hollow plate; 114. Double-acting lead screw; 115. Inner guide rod; 116. Rotating rod; 117. Drive rod; 118. Linkage rod; 119. Outer guide rod; 120. Linkage box; 21. Drive pulley; 122. Guide bar; 123. First worm gear; 124. First worm; 2. Linkage limiting structure; 21. Limiting frame; 22. Fixing frame; 23. Elastic inner pad; 24. Elastic strap; 25. Wrapping frame; 26. Guide sleeve; 27. Adjusting rod; 28. Adjusting screw; 29. ​​Limiting piece; 3. Support structure; 31. Support plate; 32. Guide plate; 33. Fixing plate; 34. Screw barrel; 35. Lifting screw; 36. Drive box; 37. Transmission rod. Detailed Implementation

[0020] 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.

[0021] like Figures 1-7 As shown, an ophthalmic examination device for ophthalmic care includes a base 12, a support structure 3 for supporting the patient's chin on the base 12, a pupil distance adjustment component and two sets of left-right symmetrical eye-expanding mechanisms 1 on the base 12, the pupil distance adjustment component drives the two sets of eye-expanding mechanisms 1 to move horizontally synchronously to adapt to the pupil distance of the patient's eyes. Each eye-expanding mechanism 1 includes a horizontally arranged examination cylinder 11. A convex lens 13 is installed at the front end of the examination cylinder 11, and two sets of upper and lower eyelid opening plates 14 are provided at the rear end. An eyelid expanding rod 15 is provided on the front side of the eyelid opening plate 14, and a gear 19 that meshes with each other is fixed at the end of the eyelid expanding rod 15 on the same side. An elastic fitting component is provided between the eyelid opening plate 14 and the examination cylinder 11, so that the eyelid opening plate 14 is tightly attached to the eyelid to prevent slippage through the elastic force. A synchronous eyelid expanding drive component is provided between the two sets of eye-expanding mechanisms 1, which synchronously drives the gears 19 on both sides to rotate, so as to realize the synchronous and equal-amplitude opening of both eyelids. The eye-dilation mechanism 1 is provided with a linkage limiting structure 2 on the side that is far away from each other. The linkage limiting structure 2 moves synchronously with the examination tube 11 on the same side to achieve left and right limitation of the patient's head.

[0022] like Figures 1-4 As shown, the interpupillary distance adjustment component includes a hollow plate 113 fixed on the base 12. A bidirectional lead screw 114 is rotatably connected inside the hollow plate 113. The left and right sections of the bidirectional lead screw 114 have opposite threads and are respectively threaded to drive rods 117. The top of the drive rod 117 is rigidly fixed to the bottom of the inspection cylinder 11 on the same side. An inner guide rod 115 is also fixed inside the hollow plate 113. The drive rod 117 and the inner guide rod 115 are slidably engaged. A linkage rod 118 is fixed to one side of the drive rod 117. An outer guide rod 119 is slidably engaged at the lower end of the linkage rod 118. The two sides of the outer guide rod 119 are fixedly connected to the base 12 through fixing blocks. When the bidirectional lead screw 114 rotates, the two drive rods 117 on both sides move synchronously in opposite directions using the two reverse threads, thereby adjusting the distance between the two sets of inspection cylinders 11 to achieve interpupillary distance adaptation. The inner guide rod 115 and the outer guide rod 119 guide the drive rod 117 and the linkage rod 118 respectively, ensuring that the inspection cylinder 11 moves smoothly and avoids deviation.

[0023] like Figures 1-6 As shown, the synchronous eyelid-expanding drive assembly includes a rotating rod 116 rotatably connected to the upper part of the hollow plate 113. A first worm gear 123 is fixedly connected to the middle of the rotating rod 116, and a first worm 124 is meshed below the first worm gear 123. A set of linkage boxes 120 are respectively provided on the upper part of the hollow plate 113. The two sides of the bidirectional lead screw 114 are respectively threaded to the bottom end of the linkage box 120, and the lower end of the linkage box 120 is also slidably engaged with the inner guide rod 115. A set of drive pulleys are respectively provided on the lower part of the linkage box 120. 121; One of the gears 19 on the same side is fixed with a driven pulley 111 via a rotating shaft 18. The eyelid expander 15 is rotatably connected to the examination cylinder 11 via the rotating shaft 18. A synchronous belt 112 is wound between the drive pulley 121 and the driven pulley 111 on the same side. A set of guide bars 122 are fixedly installed on both sides of the rotating rod 116. The guide bars 122 are slidably engaged with the drive pulley 121. The lower part of the linkage box 120 is provided with a clearance opening that matches the position of the rotating rod 116, which is used to provide clearance space for the rotation of the rotating rod 116.

[0024] like Figures 6-7 As shown, the elastic fitting assembly includes a compression rod 16 and a spring 17. One end of the compression rod 16 is fixedly connected to the eyelid stretcher 14, and the other end is slidably installed inside the eyelid expander 15. The spring 17 is located inside the compression rod 16, and both ends of the spring 17 are fixedly connected to the end of the compression rod 16 and the inside of the eyelid expander 15, respectively. The elasticity of the spring 17 provides a continuous fitting force to the eyelid stretcher 14.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 6 as well as Figure 7As shown, an annular elastic ring 110 is fixed to the edge of the rear opening of the examination tube 11. The elastic ring 110 is coaxially arranged with the eyelid stretcher 14. The eyelid stretcher 14 is an arc-shaped structure with mirror images of the upper and lower parts. Its front end and the elastic ring 110 are both made of silicone. The silicone material improves the comfort of eye contact, reduces irritation to the eyelid skin, and reduces the risk of damage.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 as well as Figure 8 As shown, the linkage limiting structure 2 includes a limiting frame 21 extending rearward along the axial direction of the examination cylinder 11. The inner rear end of the limiting frame 21 is provided with an elastic inner pad 23 for conforming to the bony protrusion of the patient's temporal region. The elastic inner pad 23 conforms to the bony protrusion of the patient's temporal region, which can effectively limit the horizontal displacement of the patient's head from left to right, and can also improve the comfort of head limiting through elastic buffering, avoiding discomfort caused by rigid compression.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 as well as Figure 8 As shown, the linkage limiting structure 2 also includes a spacing adjustment component, which includes an adjusting rod 27, a fixed frame 22, a guide sleeve 26, an adjusting screw 28, and a limiting piece 29. The fixed frame 22 is fixed to the front end of the inspection cylinder 11. The adjusting rod 27 is set inside the fixed frame 22. A set of guide sleeves 26 are slidably connected to the upper and lower sides of the fixed frame 22, respectively. The upper and lower ends of the adjusting rod 27 are fixedly connected to the upper and lower sets of guide sleeves 26, respectively. The adjusting screw 28 is rotatably installed inside the fixed frame 22 and threadedly engaged with the adjusting rod 27. It is used to drive the limiting frame 21 to move and adjust the spacing between the limiting frame 21 and the inspection cylinder 11. An adjusting knob is installed at one end of the adjusting screw 28. There are two sets of limiting pieces 29, which are fixed at the upper and lower positions of the fixed frame 22, respectively, to limit the sliding position of the guide sleeves 26.

[0028] like Figures 1-2 As shown, an elastic band assembly is provided on the rear side of the limiting frame 21. The elastic band assembly includes a wrapping frame 25 and an elastic band 24. The wrapping frame 25 and the elastic band 24 are respectively fixed on the left and right sets of limiting frames 21. The elastic band 24 has a hook and loop side of Velcro on both sides. The hook side fits against the patient's head. The elastic band 24 is fixed by the hook and loop side of Velcro, which realizes the auxiliary fixation of the patient's head and enhances the stability of the head. The hook side fits against the patient's head, improves wearing comfort, and reduces friction damage to the scalp.

[0029] like Figures 1-3As shown, the support structure 3 includes an arc-shaped support plate 31, a guide plate 32, a hollow fixed plate 33, and a lifting drive assembly. The fixed plate 33 is fixed to the rear end of the base 12, and the guide plate 32 is slidably disposed within the fixed plate 33. The support plate 31 is fixedly connected to the top end of the guide plate 32. The lifting drive assembly includes a screw cylinder 34 fixed below the support plate 31. A lifting screw 35 is threadedly connected to the bottom of the screw cylinder 34. A drive box 36 fixedly connected to the base 12 is disposed below the lifting screw 35. The drive box 36 is equipped with a second worm gear and a second worm that mesh with each other. The second worm gear is fixedly connected to the lower end of the lifting screw 35. A transmission rod 37 is installed on one side of the second worm. The transmission rod 37 rotates with the base 12. One end of the transmission rod 37 passes through the base 12 and is connected to a height adjustment head. The arc-shaped support plate 31 adapts to the patient's jaw contour, providing stable support for the patient's jaw, reducing the burden on the patient's head, and improving the comfort of the examination.

[0030] like Figure 1 , Figure 2 as well as Figure 4 As shown, one end of the first worm gear 124 passes through the hollow plate 113 and is fixed with a diaphragm expansion adjustment rocker arm; one end of the bidirectional lead screw 114 passes through the hollow plate 113 and is fixed with a spacing adjustment rocker arm; and multiple sets of fixing holes are opened on the surface of the base 12.

[0031] Working principle: When in use, first insert screws through the fixing holes on the surface of the base 12 to connect and fix the device to the installation position; after the patient is in position, place the mandible on the support plate 31 of the support structure 3, first rotate the height adjustment head to drive the transmission rod 37 to rotate, and drive the lifting screw 35 to rotate through the meshing second worm and second worm wheel in the drive box 36, and then drive the support plate 31 and guide plate 32 to slide up and down along the fixed plate 33 through the threaded screw cylinder 34, and adjust the support plate 31 to a support height suitable for the patient's mandible; Subsequently, rotating the spacing adjustment rocker causes the bidirectional lead screw 114 inside the hollow plate 113 to rotate. With the help of the two sections of the bidirectional lead screw 114 with opposite rotation directions, the drive rod 117 connected by threads on both sides and the linkage box 120 move synchronously in opposite directions along the inner guide rod 115. During the movement of the linkage box 120, the drive pulley 121 inside slides axially along the guide strip 122 on the rotating rod 116 to ensure stable transmission of torque. At the same time, the drive rod 117 drives the examination cylinder 11, which is rigidly fixed at the top, to move synchronously, realizing the spacing adjustment of the two sets of left and right symmetrical eye-dilation mechanisms 1 to match the patient's pupillary distance. The linkage rod 118 on the side of the drive rod 117 slides synchronously along the outer guide rod 119 to provide stable guidance for the movement process. When the examination cylinder 11 moves and adjusts, the linkage limiting structure 2 moves synchronously with the examination cylinder 11, so that the spacing of the limiting frames 21 on the left and right sides matches the patient's temporal width, thus achieving the matching of left and right head limiting while completing the pupillary distance adjustment. Furthermore, the adjustment knob can be rotated according to the patient's facial dimensions, causing the adjustment screw 28 inside the fixed frame 22 to rotate. Through the threaded adjustment rod 27, the guide sleeves 26 on both sides and the limiting frame 21 move back and forth along the axis of the examination cylinder 11. The limiting plates 29 on the upper and lower parts of the fixed frame 22 limit the sliding stroke of the guide sleeves 26. Adjustment is made until the elastic inner pad 23 at the rear end of the limiting frame 21 conforms to the bony prominence of the patient's temporal region, restricting the lateral horizontal displacement of the patient's head. Further adjustments are made based on this, thereby improving the stability of the limiting position; subsequently, guidance... The patient aligns the periorbital area with the eyelid retractor 14 and elastic ring 110 at the rear end of the examination tube 11. The elastic band 24 is then passed through the wrapping frame 25 and wrapped around the back of the patient's head. It is then fixed in place by the hook and loop sides of the Velcro, thus completing the auxiliary fixation of the patient's head. During this process, after the eyelid retractor 14 comes into contact with the patient's eyelid, the spring 17 can be compressed by the squeezing rod 16 to fit the patient's eyelid. The spring 17 can prevent the eyelid retractor 14 from forming a rigid contact with the eye, preventing discomfort or damage to the eye caused by rigid force impact. Then, rotating the eyelid dilation adjustment rocker causes the first worm gear 124 inside the hollow plate 113 to rotate. Through meshing with the first worm wheel 123, the rotating rod 116 rotates synchronously. The rotating rod 116 drives the drive pulleys 121 inside the linkage boxes 120 on both sides to rotate synchronously through the guide bars 122 arranged axially on both sides. Then, through the synchronous belt 112, it drives the driven pulley 111 on the same side to rotate. In turn, through the rotating shaft 18, it drives the eyelid dilation rod 15 to rotate. With the help of the gears 19 meshing with each other at the ends of the eyelid dilation rod 15 on the same side, the two sets of eyelid opening plates 14 arranged in mirror image at the rear end of the examination cylinder 11 open and close synchronously in opposite directions, so as to realize the synchronous equal amplitude opening of the patient's two eyelids. During the opening process, the spring 17 inside the elastic fitting component continuously provides elasticity to the squeezing rod 16, causing the eyelid opening piece 14 to remain tightly attached to the patient's eyelid skin, preventing slippage during the opening process. The elastic ring 110 at the rear opening edge of the examination tube 11 has good elasticity, preventing its rear end from directly contacting the eye and causing discomfort or damage. The silicone material of the front end of the eyelid opening piece 14 and the elastic ring 110 can improve the patient's comfort during contact. At this time, the convex lens 13 at the front end of the examination tube 11 is coaxially aligned with the patient's pupil after opening, and the examination light path constructed by the convex lens 13 can be used to clearly observe the patient's ocular surface structure, so as to smoothly carry out subsequent eye examinations and nursing operations.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and 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, and therefore should not be construed as a limitation of this 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication 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.

[0033] 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 variations 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 ophthalmic examination device for ophthalmic care, comprising a base (12), wherein the base (12) is provided with a support structure (3) for supporting the patient's chin, characterized in that, The base (12) is equipped with a pupil distance adjustment component and two sets of left and right symmetrical eye expansion mechanisms (1). The pupil distance adjustment component drives the two sets of eye expansion mechanisms (1) to move horizontally synchronously to adapt to the pupil distance of the patient's eyes. Each eye-expanding mechanism (1) includes a horizontally arranged examination cylinder (11), a convex lens (13) installed at the front end of the examination cylinder (11), and two sets of upper and lower eyelid opening plates (14) at the rear end. An eyelid expanding rod (15) is provided on the front side of the eyelid opening plate (14), and a gear (19) that meshes with each other is fixed at the end of the eyelid expanding rod (15) on the same side. An elastic fitting component is provided between the eyelid opening plate (14) and the examination cylinder (11), and the eyelid opening plate (14) is tightly attached to the eyelid to prevent slippage through the elastic force. A synchronous eyelid expanding drive component is provided between the two sets of eye-expanding mechanisms (1), which synchronously drives the gears (19) on both sides to rotate, so as to realize the synchronous and equal-amplitude opening of both eyelids. The eye-expanding mechanism (1) has a linkage limiting structure (2) on one side away from each other. The linkage limiting structure (2) moves synchronously with the examination cylinder (11) on the same side to achieve left and right limitation of the patient's head. The pupil distance adjustment component includes a hollow plate (113) fixed on the base (12). A bidirectional screw (114) is rotatably connected inside the hollow plate (113). The two sections of the bidirectional screw (114) have opposite screw directions and are respectively threaded to a drive rod (117). The top of the drive rod (117) is rigidly fixed to the bottom of the examination cylinder (11) on the same side. The synchronous eye-expanding drive assembly includes a rotating rod (116) rotatably connected to the upper part of the hollow plate (113). A first worm gear (123) is fixedly connected to the middle of the rotating rod (116). A first worm gear (124) is meshed below the first worm gear (123). A set of linkage boxes (120) are respectively provided on the upper part of the hollow plate (113). The two-way screw (114) is threaded to the bottom of the linkage box (120) on both sides. A set of drive pulleys (121) are respectively provided on the lower part of the linkage box (120). One of the gears (19) on the same side is fixed with a driven pulley (111) through a rotating shaft (18). The eyelid expander (15) is rotatably connected to the inspection cylinder (11) through the rotating shaft (18). A synchronous belt (112) is wound between the drive pulley (121) and the driven pulley (111) on the same side. A set of guide strips (122) are fixedly installed on both sides of the rotating rod (116). The guide strips (122) are slidably engaged with the drive pulleys (121). The lower part of the linkage box (120) is provided with a clearance opening that matches the position of the rotating rod (116).

2. The ophthalmic examination device for ophthalmic care according to claim 1, characterized in that, An inner guide rod (115) is fixed inside the hollow plate (113). The drive rod (117) is slidably engaged with the inner guide rod (115). A linkage rod (118) is fixed on one side of the drive rod (117). An outer guide rod (119) is slidably engaged at the lower end of the linkage rod (118). The outer guide rod (119) is fixedly connected to the base (12) on both sides by fixing blocks.

3. The ophthalmic examination device for ophthalmic care according to claim 2, characterized in that, The lower end of the linkage box (120) also slides with the inner guide rod (115).

4. The ophthalmic examination device for ophthalmic care according to claim 3, characterized in that, The elastic fitting assembly includes a squeezing rod (16) and a spring (17). One end of the squeezing rod (16) is fixedly connected to the eyelid stretcher (14), and the other end is slidably installed inside the eyelid expander (15). The spring (17) is located inside the squeezing rod (16), and both ends of the spring (17) are fixedly connected to the end of the squeezing rod (16) and the inside of the eyelid expander (15), respectively.

5. An eye examination device for ophthalmic care according to claim 4, characterized in that, The rear opening edge of the examination tube (11) is fixed with an annular elastic ring (110). The elastic ring (110) is coaxially arranged with the eyelid opening piece (14). The eyelid opening piece (14) is an arc-shaped structure with mirror images of each other.

6. An eye examination device for ophthalmic care according to claim 1, characterized in that, The linkage limiting structure (2) includes a limiting frame (21) extending rearward along the axial direction of the examination tube (11), and the inner rear end of the limiting frame (21) is provided with an elastic inner pad (23) for fitting the bony protrusion of the patient's temporal region.

7. An eye examination device for ophthalmic care according to claim 6, characterized in that, The linkage limiting structure (2) also includes a spacing adjustment component, which includes an adjusting rod (27), a fixed frame (22), a guide sleeve (26), an adjusting screw (28), and a limiting piece (29). The fixed frame (22) is fixed to the front end of the inspection cylinder (11). The adjusting rod (27) is set inside the fixed frame (22). A set of guide sleeves (26) are slidably connected to the upper and lower sides of the fixed frame (22). The upper and lower ends of the adjusting rod (27) are fixedly connected to the upper and lower sets of guide sleeves (26). The adjusting screw (28) is rotatably installed inside the fixed frame (22) and threadedly engaged with the adjusting rod (27) to drive the limiting frame (21) to move and adjust the spacing between the limiting frame (21) and the inspection cylinder (11). An adjusting knob is installed at one end of the adjusting screw (28). Two sets of limiting pieces (29) are provided and fixed at the upper and lower positions of the fixed frame (22).

8. An eye examination device for ophthalmic care according to claim 7, characterized in that, The rear side of the limiting frame (21) is provided with an elastic strap assembly. The elastic strap assembly includes a wrapping frame (25) and an elastic strap (24). The wrapping frame (25) and the elastic strap (24) are respectively fixed on the left and right sets of limiting frames (21). The elastic strap (24) is provided with a Velcro surface and a hook surface on both sides.

9. An eye examination device for ophthalmic care according to claim 1, characterized in that, The support structure (3) includes an arc-shaped support plate (31), a guide plate (32), a hollow fixed plate (33), and a lifting drive assembly. The fixed plate (33) is fixed to the rear end of the base (12). The guide plate (32) is slidably disposed in the fixed plate (33). The support plate (31) is fixedly connected to the top end of the guide plate (32). The lifting drive assembly includes a screw cylinder (34) fixed below the support plate (31). A lifting screw (35) is threadedly connected below the screw cylinder (34). A drive box (36) fixedly connected to the base (12) is provided below the lifting screw (35). The drive box (36) is equipped with a second worm gear and a second worm that mesh with each other. The second worm gear is fixedly connected to the lower end of the lifting screw (35). A transmission rod (37) is installed on one side of the second worm. The transmission rod (37) rotates with the base (12). One end of the transmission rod (37) passes through the base (12) and is connected to a height adjustment head.

10. An eye examination device for ophthalmic care according to claim 3, characterized in that, One end of the first worm (124) passes through the hollow plate (113) and is fixed with a diaphragm adjustment rocker arm; one end of the bidirectional lead screw (114) passes through the hollow plate (113) and is fixed with a spacing adjustment rocker arm; and multiple sets of fixing holes are opened on the surface of the base (12).

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