Small fundus imaging equipment

Abstract

The technical scheme of the utility model discloses a small fundus imaging device which comprises an outer cylinder and an inner cylinder which are telescopically connected with the outer cylinder through a pull-rotation connecting mechanism. The ophthalmoscope is arranged in the inner cylinder; the eye curtain is movably connected with the inner cylinder through a rotary adjusting mechanism and used for adjusting the eyes of the user; and the camera shooting base is detachably connected with the outer cylinder and is used for shooting the eye actions of the user through the ophthalmoscope. The small fundus imaging device is small and exquisite in structure, convenient to carry about in daily life, simple in structure and convenient to operate, fundus imaging can be achieved only by pulling the outer cylinder and the inner cylinder open, rotating and fixing the outer cylinder and the inner cylinder, separating the eyelids of a user through the rotating ring to expose eyeballs and cooperating with interactive games of a mobile phone end or other mobile ends, and the fundus imaging efficiency is improved. The detection information result can be obtained through data analysis, the user can achieve fundus detection by himself / herself without going to a medical institution, and the early diagnosis rate and the mother and infant safety are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of fundus endoscope technology, and in particular to a small fundus imaging device. Background Technology

[0002] In the field of maternal and infant health, gestational hypertension (GEHD) has always been a major challenge affecting the safety of pregnant women and fetuses. GEHD can not only cause pregnant women to experience a series of serious symptoms such as high blood pressure, proteinuria, and edema, but it can also lead to life-threatening complications such as abnormal liver function, liver rupture, hypertensive heart disease, and pulmonary edema. For the fetus, GEHD can lead to adverse consequences such as intrauterine growth restriction, premature birth, and low birth weight, and may even induce emergencies such as eclampsia, posing a significant threat to the safety of both mother and child.

[0003] Currently, the detection of preeclampsia mainly relies on methods such as ambulatory blood pressure monitoring and 24-hour urine protein quantification. However, these methods have limitations such as complex operation and non-quantitative data, making it difficult to meet the immediate needs of early screening and disease management. Therefore, exploring a more convenient, accurate, and non-invasive detection method is of great significance for improving the early diagnosis rate of preeclampsia and ensuring maternal and infant safety.

[0004] The ratio of retinal vessel diameter to retinal vessel diameter and other fundus changes, as important indicators reflecting the state of blood circulation and systemic microvascular disease, have shown great potential in the early diagnosis of preeclampsia in recent years. Fundus examination can not only quickly reflect the patient's basic condition, but also has the advantages of being rapid, non-invasive, and repeatable, making it an emerging direction for early screening and management of preeclampsia.

[0005] However, traditional fundus imaging equipment often suffers from problems such as bulky size, high cost, and complex operation, requiring manual assistance from specialized ophthalmologists who analyze data based on their ophthalmological knowledge. This significantly limits its potential for large-scale application in obstetrics. The scarcity of specialized ophthalmologists, particularly in primary healthcare institutions and remote areas, further underscores the urgency of this issue.

[0006] Traditional fundusoscopes include three types, each with different fields of view, subjectivity, comfort, and technical requirements:

[0007] 1. Direct fundus camera

[0008] Limited field of view: Direct ophthalmoscopy has a relatively small field of view, which may not be able to fully cover the fundus area, leading to the omission of some lesions and increasing the risk of misdiagnosis or missed diagnosis.

[0009] Highly subjective: The results of direct fundus examination rely on the doctor's direct observation and experience, which involves a certain degree of subjectivity and uncertainty, and may affect the accuracy of diagnosis.

[0010] Discomfort: During the examination, doctors and patients need to be in close contact, which may make doctors feel tired, while patients may also feel nervous and uncomfortable.

[0011] High technical threshold: Using a direct ophthalmoscope requires certain operating skills and experience, which is difficult for non-professional doctors or patients to operate on their own.

[0012] 2. Indirect ophthalmoscopy

[0013] Image inversion: The image seen by indirect ophthalmoscope is inverted, which requires training to master, increasing the difficulty of use and the learning cost.

[0014] Low image magnification: Indirect ophthalmoscopes have relatively low image magnification, which limits their ability to distinguish small lesions and may affect the accuracy of diagnosis.

[0015] Bulky equipment: Compared to portable equipment, indirect ophthalmoscopes may be bulky and inconvenient to use in many situations, especially in homes or primary healthcare facilities.

[0016] Complex operation: Although indirect ophthalmoscopy plays an important role in the diagnosis and treatment of diseases of the posterior segment of the eye, its operation is relatively complex and requires professional doctors to operate and interpret it.

[0017] 3. Fundus camera

[0018] High equipment price: Fundus cameras are usually expensive, which may be difficult for primary healthcare institutions or patients with poor economic conditions to afford.

[0019] High skill requirements: Using a fundus camera requires certain operating skills and experience, which may be difficult for non-professionals to master.

[0020] Data interpretation relies on professional doctors: Images taken by fundus cameras need to be interpreted and analyzed by professional doctors, which increases the complexity and time cost of diagnosis.

[0021] High equipment maintenance costs: As a precision medical device, the fundus camera requires regular maintenance and calibration to ensure its accuracy and stability, which increases the equipment's maintenance costs.

[0022] Therefore, designing a small, user-friendly fundus imaging device has become a topic worthy of in-depth exploration. Meanwhile, existing imaging devices all have certain shortcomings in the early screening and management of preeclampsia. To better meet clinical needs, future research should focus on developing more portable, easy-to-operate, affordable, and diagnostically accurate fundus imaging devices to improve the early diagnosis rate of preeclampsia and enhance maternal and infant safety. Utility Model Content

[0023] The technical problem solved by this invention is that traditional fundus lenses are inconvenient to carry, require high operating skills, and are expensive, making them unsuitable for the general population, especially for patients with common pregnancy-induced hypertension.

[0024] To solve the above-mentioned technical problems, the present invention provides a small fundus imaging device, wherein the fundus imaging device includes:

[0025] The outer cylinder is open at both ends and runs through the axial direction.

[0026] The inner cylinder is telescopically connected to the outer cylinder via a pull-turn connection mechanism;

[0027] An ophthalmoscope is disposed within the inner cylinder;

[0028] The eyelids, movably connected to the inner cylinder via a rotation adjustment mechanism, are used to adjust the user's eyes; and

[0029] A camera base, detachably connected to the outer tube, is used to capture images of the user's eye movements through the ophthalmoscope.

[0030] Optionally, the inner cylinder includes:

[0031] The upper inner cylinder is open at both ends and runs through the axial direction.

[0032] The lower inner cylinder is open at both ends and runs through the entire cylinder along its axis; and

[0033] The ophthalmoscope connects the upper inner tube and the lower inner tube, and brings the upper inner tube and the lower inner tube into contact.

[0034] Optionally, the pull-rotate connection mechanism includes:

[0035] A positioning convex ring is formed outwardly on the outer side of the bottom of the lower inner cylinder;

[0036] A positioning concave ring is formed concavely on the inner side of the outer cylinder near the top position. The positioning convex ring and the positioning concave ring are size-matched to prevent the lower inner cylinder and the outer cylinder from separating during the stretching process.

[0037] Multiple positioning grooves are evenly arranged on the inner top circumferential direction of the outer cylinder;

[0038] Multiple positioning guide grooves are formed along the axial direction of the inner cylinder at positions on the outer side of the inner cylinder corresponding to the positioning groove member. The positioning groove member is submerged in the positioning guide groove to prevent the inner cylinder from rotating in the circumferential direction when stretched with the outer cylinder.

[0039] A positioning ring groove is provided at the bottom outer side of the lower inner cylinder and near the positioning protrusion.

[0040] Multiple positioning blocks are connected to the surface of the positioning ring groove and located outside the plane in the extension direction of the positioning guide groove. The positioning blocks remain horizontal with the positioning groove when the positioning guide groove is separated from the positioning groove, and are inserted into the positioning groove to fix the lower inner cylinder and the outer cylinder when the lower inner cylinder is rotated.

[0041] Optionally, the upper inner cylinder and the lower inner cylinder are respectively provided with an upper mounting hole and a lower mounting hole for connecting the ophthalmoscope. The ophthalmoscope is installed with an interference fit between the upper mounting hole and the lower mounting hole so that the upper inner cylinder and the lower inner cylinder are in close contact.

[0042] Optionally, the eyelid includes:

[0043] A pair of eyelid pieces are symmetrically installed in the upper inner cylinder;

[0044] A pair of eye contact pads are detachably connected to the corresponding eyelid components;

[0045] The face contact pad has an opening for the passage of a pair of eyelid pieces. It is fitted over the pair of eyelid pieces through the opening and connected to the upper inner cylinder. When the pair of eyelid pieces move, they move away from or closer to each other within the range of the opening.

[0046] Optionally, the rotation adjustment mechanism is disposed in the upper inner cylinder for controlling the movement of the pair of eyelid pieces away from or towards each other, and includes:

[0047] A rotating ring is fitted around the outside of the upper inner cylinder;

[0048] A rotating base is connected to the inside of the upper inner cylinder, and one end passes through the upper inner cylinder and is connected to the rotating ring;

[0049] A base limiting component is connected to the inside of the upper inner cylinder and contacts the surface of the rotating base;

[0050] A protruding limiting member is connected inside the upper inner cylinder and contacts the surface of the base limiting member; wherein...

[0051] The pair of eyelid pieces are connected to the rotating base by fasteners and pass through the base limiting member and the protrusion limiting member; and the base limiting member and the protrusion limiting member are located between the face contact pad and the rotating base.

[0052] Optionally,

[0053] The inner wall of the rotating ring is provided with a connecting groove;

[0054] One end of the rotating base extends outward to form a connecting block. The surface of the rotating base is provided with an observation hole and a pair of moving tracks running vertically through it. The observation hole is located in the middle of the rotating base, and the pair of moving tracks are symmetrically distributed on the outer side of the observation hole.

[0055] The side wall of the upper inner cylinder is provided with a moving groove;

[0056] The connecting block of the rotating base passes through the moving groove and is connected to the connecting groove. The fastener passes through the moving track and is connected to the pair of eyelid pieces. When the rotating ring rotates, the fastener drives the pair of eyelid pieces to move in the moving track so as to move the pair of eyelid pieces away from or closer to each other.

[0057] The base limiting member has a first limiting hole, and the protruding limiting member has a second limiting hole. The first limiting hole and the second limiting hole are used to limit the movement of the pair of eyelid members.

[0058] The facial contact pad has an opening whose size and structure match the second limiting hole.

[0059] Optionally, the camera base includes:

[0060] The battery box is detachably connected to one end opening of the outer cylinder;

[0061] The camera is vertically fixed to the middle of the battery box and faces the eyelid;

[0062] An LED light, vertically fixed to the battery box and located next to the camera; and

[0063] A limiting plate is fitted onto the camera and the LED light and connected to the opening of the outer cylinder, with a gap between the limiting plate and the battery box.

[0064] Optionally, the battery box has a power loading section for installing a power source and a box cover.

[0065] The beneficial effects of this utility model's technical solution are:

[0066] This invention relates to a compact fundus imaging device, which is easy to carry and operate. The device is simple in structure and convenient to use. Users simply pull apart and rotate the outer and inner tubes to secure them, then use a rotating ring to separate the eyelids and expose the eyeball. Combined with an interactive game on a mobile device, fundus imaging can be achieved. Data analysis provides the test results, allowing users to perform fundus examinations themselves without visiting a medical institution, significantly improving early diagnosis rates and maternal and infant safety. Because the construction of this compact fundus imaging device is less complex than that of traditional ophthalmoscopes, its price is significantly lower, making it more affordable, while maintaining high diagnostic accuracy. Attached Figure Description

[0067] Figure 1 This is a perspective view of the small fundus imaging device in the embodiments of this utility model;

[0068] Figure 2 This is an exploded view of the small fundus imaging device in the embodiments of this utility model;

[0069] Figure 3 This is a schematic diagram of the stretching process of the small fundus imaging device in the embodiment of this utility model;

[0070] Figure 4 This is a structural diagram showing the relationship between the lower inner cylinder and the outer cylinder in an embodiment of this utility model;

[0071] Figure 5 This is a schematic diagram of the connection process between the lower inner cylinder and the outer cylinder in an embodiment of this utility model;

[0072] Figure 6 This is an exploded view of the upper inner cylinder and eyelid in an embodiment of this utility model;

[0073] Figure 7 This is a schematic diagram showing the connection relationship between the eyelid and the rotating base in an embodiment of this utility model;

[0074] Figure 8 This is a schematic diagram illustrating the motion relationship between the rotating base and the eyelid in an embodiment of this utility model;

[0075] Figure 9 This is a schematic diagram showing the relationship between the upper inner cylinder and the rotating ring in an embodiment of this utility model;

[0076] Figure 10 This is a schematic diagram showing the relationship between the upper inner cylinder and the rotating base in an embodiment of this utility model;

[0077] Figure 11 This is a cross-sectional view of the upper inner cylinder and rotating base after installation in an embodiment of this utility model;

[0078] Figure 12 This is a schematic diagram showing the relationship between the upper inner cylinder, the lower inner cylinder, and the ophthalmoscope in an embodiment of this utility model. Figure 1 ;

[0079] Figure 13 This is a schematic diagram showing the relationship between the upper inner cylinder, the lower inner cylinder, and the ophthalmoscope in an embodiment of this utility model. Figure 2 ;

[0080] Figure 14 This is a schematic diagram of the camera base in an embodiment of the present invention;

[0081] Figure 15 This is a schematic diagram of the installation of the camera base and outer cylinder in an embodiment of this utility model;

[0082] Figure 16 This is a schematic diagram of the battery box in an embodiment of the present invention.

[0083] In the attached diagram: 1. Outer cylinder, 2. Inner cylinder, 3. Eyelid, 4. Camera base, 5. Rotation adjustment mechanism, 6. Ophthalmoscope, 7. Fastener, 8. Pull-turn connection mechanism, 21. Upper inner cylinder, 22. Lower inner cylinder, 31. Eyelid component, 32. Eye contact pad, 33. Face contact pad, 41. Battery box, 42. Camera, 43. LED light, 44. Limiting plate, 45. Gap, 51. Rotating ring, 52. Rotating base, 53. Base limiting component, 54. Protrusion limiting component, 81. Positioning protrusion ring 82. Positioning concave ring; 83. Positioning groove; 84. Positioning guide groove; 85. Positioning ring groove; 86. Positioning block; 211. Moving groove; 212. Upper mounting hole; 221. Lower mounting hole; 311. Eyelid base; 312. Eyelid protrusion; 313. Mounting groove; 411. Power supply loading part; 412. Box cover; 441. Mounting hole; 511. Connecting groove; 521. Observation hole; 522. Moving track; 523. Connecting block; 531. First limiting hole; 541. Second limiting hole. Detailed Implementation

[0084] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0085] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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 utility model.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0087] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0088] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] Please see Figure 1 , Figure 2 and Figure 3 The illustration shows a small fundus imaging device according to one embodiment. The fundus imaging device includes an outer tube 1, which is open at both ends and runs through the axial direction; an inner tube 2, which is telescopically connected to the outer tube 1 via a pull-and-turn connection mechanism 8; an ophthalmoscope 6, which is disposed in the inner tube 2; an eyelid 3, which is movably connected to the inner tube 2 via a rotation adjustment mechanism 5 for adjusting the user's eyes; and a camera base 4, which is detachably connected to the outer tube 1 for capturing images of the user's eye movements through the ophthalmoscope 6.

[0090] In this embodiment, as Figure 12 and Figure 13As shown, the inner cylinder 2 includes an upper inner cylinder 21, which is open at both ends and runs through the axial direction; a lower inner cylinder 22, which is open at both ends and runs through the axial direction; and an ophthalmoscope 6, which connects the upper inner cylinder 21 and the lower inner cylinder 22 and brings them into contact. The upper inner cylinder 21 and the lower inner cylinder 22 are respectively provided with an upper mounting hole 212 and a lower mounting hole 221 for connecting the ophthalmoscope 6. The ophthalmoscope 6 is installed with an interference fit between the upper mounting hole 212 and the lower mounting hole 221, so that the upper inner cylinder 21 and the lower inner cylinder 22 are in close contact.

[0091] In this embodiment, as Figure 4 and Figure 5 As shown, the pull-and-turn connection mechanism 8 includes a positioning convex ring 81, which is formed outwardly on the bottom outer side of the lower inner cylinder 22; a positioning concave ring 82, which is formed inwardly on the inner side of the outer cylinder 1 near the top position; the positioning convex ring 81 and the positioning concave ring 82 are sized to match to prevent the lower inner cylinder 22 and the outer cylinder 1 from separating during the stretching process; a plurality of positioning grooves 83, which are evenly arranged in the circumferential direction of the top inner side of the outer cylinder 1; and a plurality of positioning guide grooves 84, which are formed along the inner cylinder 2 (including the upper inner cylinder 21 and the lower inner cylinder 22), with the positioning guide grooves 84 formed on the surfaces of the upper inner cylinder 21 and the lower inner cylinder 22, or directly on the surface of the lower inner cylinder 22 without being formed on the surface of the upper inner cylinder 21, depending on the specific requirements. The axial direction (depending on the body condition) is formed on the outer side of the inner cylinder 2 at a position corresponding to the positioning groove 83. The positioning groove 83 is submerged in the positioning guide groove 84 to prevent the inner cylinder 2 from rotating circumferentially when stretched with the outer cylinder 1. The positioning ring groove 85 is set at the bottom of the outer side of the lower inner cylinder 22 and close to the positioning convex ring 81. Multiple positioning blocks 86 are connected to the surface of the positioning ring groove 85 and are located outside the plane where the positioning guide groove 84 extends. The positioning blocks 86 remain horizontal with the positioning groove 83 when the positioning guide groove 84 is separated from the positioning groove 83, and when the lower inner cylinder 22 is rotated, they are inserted into the positioning groove 83 to fix the lower inner cylinder 22 and the outer cylinder 1.

[0092] In this embodiment, as Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, the eyelid 3 includes a pair of eyelid pieces 31, symmetrically installed in the upper inner cylinder 21; a pair of eye contact pads 32, each detachably connected to its corresponding eyelid piece 31; and a face contact pad 33, which has an opening 331 for the pair of eyelid pieces 31 to pass through. The pad is fitted over the pair of eyelid pieces 31 through the opening 331 and connected to the upper inner cylinder 21. When in motion, the pair of eyelid pieces 31 move away from or closer to each other within the range of the opening 331 (see [reference]). Figure 1 It can be known that...

[0093] In this embodiment, as Figure 6 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the rotation adjustment mechanism 5 is disposed in the upper inner cylinder 21 and is used to control the movement of a pair of eyelid pieces 31 moving away from or closer to each other. It includes a rotating ring 51, which is sleeved on the outside of the upper inner cylinder 21; a rotating base 52, which is connected to the inside of the upper inner cylinder 21 and has one end passing through the upper inner cylinder 21 and connected to the rotating ring 51; a base limiting member 53, which is connected to the inside of the upper inner cylinder 21 and contacts the surface of the rotating base 52; and a protruding limiting member 54, which is connected to the inside of the upper inner cylinder 21 and contacts the surface of the base limiting member 53. The pair of eyelid pieces 31 are connected to the rotating base 52 by fasteners 7 and pass through the base limiting member 53 and the protruding limiting member 54. The base limiting member 53 and the protruding limiting member 54 are located between the face contact pad 33 and the rotating base 52.

[0094] In this embodiment, as Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the inner wall of the rotating ring 51 has a connecting groove 511; one end of the rotating base 52 extends outward to form a connecting block 523; the surface of the rotating base 52 has an observation hole 521 and a pair of moving tracks 522 extending vertically through it; the observation hole 521 is located in the middle of the rotating base 52, and the pair of moving tracks 522 are symmetrically distributed on the outer side of the observation hole 521; the side wall of the upper inner cylinder 21 has a moving groove 211; the connecting block 523 of the rotating base 52 passes through the moving groove 211 and connects to the connecting groove 511; the fastener 7 passes through... The moving track 522 is connected to a pair of eyelid pieces 31. When the rotating ring 51 rotates, the fastener 7 drives the pair of eyelid pieces 31 to move in the moving track 522 to move the pair of eyelid pieces 31 away from or close to each other. The base limiting member 53 has a first limiting hole 531, and the protruding limiting member 54 has a second limiting hole 541. The first limiting hole 531 and the second limiting hole 541 are used to limit the movement of the pair of eyelid pieces 31. The face contact pad 33 has an opening 331 whose size and structure match the second limiting hole 541.

[0095] After the eyelid 3 and the upper inner cylinder 21 are installed, the eyelid 31 is connected to the rotating base 52 by the fastener 7, and the upper part passes through the first limiting hole 531 of the base limiting member 53, the second limiting hole 541 of the protrusion limiting member 54 and the movable opening 331 of the face contact pad 33, and the movable opening 331 is exposed.

[0096] The eyelid component 31 includes an eyelid base 311 and an eyelid protrusion 312. The first limiting hole 531 of the base limiting member 53 is used to limit the eyelid base 311, and the second limiting hole 541 of the protrusion limiting member 54 is used to limit the eyelid protrusion 312. The eyelid protrusion 312 is also provided with a mounting groove 313 for mounting the eye contact pad 32.

[0097] In this embodiment, as Figure 14 , Figure 15 and Figure 16 As shown, the camera base 4 includes a battery box 41, detachably connected to the opening at one end of the outer cylinder 1; a camera 42, vertically fixed to the middle of the battery box 41 and facing the eyelid 3; an LED light 43, vertically fixed to the battery box 41 and located next to the camera 42; and a limiting plate 44, sleeved on the camera 42 and the LED light 43 and connected to the opening of the outer cylinder 1, with a gap 45 between the limiting plate 44 and the battery box 41. The battery box 41 has a power loading part 411 for installing a power source and a cover 412, and the limiting plate 44 has mounting holes 441 for the camera 42 and the LED light 43 to pass through.

[0098] This embodiment also provides a method of using a small fundus imaging device according to any one of the above claims, wherein the method of use is as follows:

[0099] In use, the inner cylinder 2 is pulled out from the outer cylinder 1 and rotated. The inner cylinder 2 and the outer cylinder 1 are fixed by the pull-and-turn connecting mechanism 8. The pair of eyelid pieces 31 are aligned with the upper and lower eyelids of one of the user's eyes, respectively. By rotating the rotating ring 51, the pair of eyelid pieces 31 are gradually moved away from each other, opening the user's upper and lower eyelids to a suitable position and exposing the eyeball. The user's other eye completes the eye position guidance under the guidance of the mobile interactive game. The LED light 53 provides the light source, and the camera 52 records the user's eye movements and sends the captured data to the background processor for data analysis to obtain an assessment of the fundus health. Finally, after the game ends, the interaction and health status information is summarized on the mobile phone interface.

[0100] The following description will further illustrate the characteristics and functions of this utility model.

[0101] In this embodiment, the small fundus imaging device (hereinafter referred to as the product) allows the user to assemble the device, align it with the eye to be tested, and fix the eye by rotating the sliding component with one hand. The user then opens the mini-program to enter the interactive interface, selects the eye to be tested, performs position calibration, and the eye not being tested focuses on the app interface for eye position guidance interaction.

[0102] Users can remove and wear disposable masks and replace disposable eye pads (in cases of multiple users). Pick up the product, stretch the inner cylinder 2, and rotate it to the right (or left) to lock it in place, completing the assembly of the ophthalmoscope 6. Place the side of the product with the silicone pads (i.e., the two eyelid pieces 31) on the eye being examined, with the two opening and closing pads (i.e., eye contact pads 32, which can be made of silicone or other soft, skin-friendly materials) resting against the upper and lower eyelids. Rotate the rotating ring 51 on the product with one hand; the two opening and closing structures move downwards (upwards), opening the eyelids, ready for imaging.

[0103] The other eye (the unexamined eye) completes eye positioning guidance under the guidance of a mobile interactive game (see the user guide on the APP for details). During this process, the smart fundus mirror's camera 42 automatically captures images and uploads them to the system for image analysis and fundus health assessment. Finally, after the game ends, the interaction and health status information is summarized on the feedback interface.

[0104] The mobile interactive game is used in conjunction with the product to guide eye movement and capture images. Based on the principle of conjugate eye movement (left and right eyes move in the same direction), the app uses small stars to guide the idle eye to capture a large star. While the large star disappears, the device captures an image of the tested eye. The device then sends eye-position interaction commands to the mini-program based on the detected image, guiding changes in the eye's interactive position within the program. The eye status of the interactive program NPC (Maisi) indicates to the user whether the capture was successful.

[0105] Place the product on the eye being tested - select the eye to be tested within the mini-program - adjust the human-machine position - start the game - the untested eye controls the NPC to catch stars by rotating the eyeball - the NPC switches between different states to provide real-time feedback on the capture situation, and the end page informs the user of the current eye health status and the ratio of the diameter of the arteries and veins in the fundus, while generating a periodic change graph to help the user understand the phased changes in eye health. If an abnormal ratio is detected, the mini-program will automatically pop up medical advice.

[0106] In summary, this utility model's miniature fundus imaging device is compact and easy to carry, with a simple structure and convenient operation. It only requires pulling apart and rotating the outer and inner tubes to fix them in place, then using a rotating ring to separate the user's eyelids and expose the eyeball. Combined with interactive games on a mobile phone or other mobile device, fundus imaging can be achieved. Data analysis yields the detection results, allowing users to perform fundus examinations themselves without visiting medical institutions, significantly improving early diagnosis rates and maternal and infant safety. Because the construction of this miniature fundus imaging device is less complex than traditional fundus endoscopes, its price is far lower, making it more affordable, and it offers high diagnostic accuracy.

[0107] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small fundus imaging device, characterized in that, The fundus imaging device includes: The outer cylinder is open at both ends and runs through the axial direction. The inner cylinder is telescopically connected to the outer cylinder via a pull-turn connection mechanism; An ophthalmoscope is disposed within the inner cylinder; The eyelids, movably connected to the inner cylinder via a rotation adjustment mechanism, are used to adjust the user's eyes; and A camera base, detachably connected to the outer tube, is used to capture images of the user's eye movements through the ophthalmoscope.

2. The miniature fundus imaging device according to claim 1, characterized in that, The inner cylinder includes: The upper inner cylinder is open at both ends and runs through the axial direction. The lower inner cylinder is open at both ends and runs through the entire cylinder along its axis; and The ophthalmoscope connects the upper inner tube and the lower inner tube, and brings the upper inner tube and the lower inner tube into contact.

3. The miniature fundus imaging device according to claim 2, characterized in that, The pull-rotate connection mechanism includes: A positioning convex ring is formed outwardly on the outer side of the bottom of the lower inner cylinder; A positioning concave ring is formed concavely on the inner side of the outer cylinder near the top position. The positioning convex ring and the positioning concave ring are size-matched to prevent the lower inner cylinder and the outer cylinder from separating during the stretching process. Multiple positioning grooves are evenly arranged on the inner top circumferential direction of the outer cylinder; Multiple positioning guide grooves are formed along the axial direction of the inner cylinder at positions on the outer side of the inner cylinder corresponding to the positioning groove member. The positioning groove member is submerged in the positioning guide groove to prevent the inner cylinder from rotating in the circumferential direction when stretched with the outer cylinder. A positioning ring groove is provided at the bottom outer side of the lower inner cylinder and near the positioning protrusion. Multiple positioning blocks are connected to the surface of the positioning ring groove and located outside the plane in the extension direction of the positioning guide groove. The positioning blocks remain horizontal with the positioning groove when the positioning guide groove is separated from the positioning groove, and are inserted into the positioning groove to fix the lower inner cylinder and the outer cylinder when the lower inner cylinder is rotated.

4. The miniature fundus imaging device according to claim 3, characterized in that, The upper inner cylinder and the lower inner cylinder are respectively provided with an upper mounting hole and a lower mounting hole for connecting the ophthalmoscope. The ophthalmoscope is installed with an interference fit between the upper mounting hole and the lower mounting hole so that the upper inner cylinder and the lower inner cylinder are in close contact.

5. The miniature fundus imaging device according to claim 4, characterized in that, The eyelid includes: A pair of eyelid pieces are symmetrically installed in the upper inner cylinder; A pair of eye contact pads are detachably connected to the corresponding eyelid components; The face contact pad has an opening for the passage of a pair of eyelid pieces. It is fitted over the pair of eyelid pieces through the opening and connected to the upper inner cylinder. When the pair of eyelid pieces move, they move away from or closer to each other within the range of the opening.

6. The miniature fundus imaging device according to claim 5, characterized in that, The rotation adjustment mechanism is disposed in the upper inner cylinder and is used to control the movement of the pair of eyelid pieces moving away from or closer to each other, and includes: A rotating ring is fitted around the outside of the upper inner cylinder; A rotating base is connected to the inside of the upper inner cylinder, and one end passes through the upper inner cylinder and is connected to the rotating ring; A base limiting component is connected to the inside of the upper inner cylinder and contacts the surface of the rotating base; A protruding limiting member is connected inside the upper inner cylinder and contacts the surface of the base limiting member; wherein... The pair of eyelid pieces are connected to the rotating base by fasteners and pass through the base limiting member and the protrusion limiting member; and the base limiting member and the protrusion limiting member are located between the face contact pad and the rotating base.

7. The miniature fundus imaging device according to claim 6, characterized in that, The inner wall of the rotating ring is provided with a connecting groove; One end of the rotating base extends outward to form a connecting block. The surface of the rotating base is provided with an observation hole and a pair of moving tracks running vertically through it. The observation hole is located in the middle of the rotating base, and the pair of moving tracks are symmetrically distributed on the outer side of the observation hole. The side wall of the upper inner cylinder is provided with a moving groove; The connecting block of the rotating base passes through the moving groove and is connected to the connecting groove. The fastener passes through the moving track and is connected to the pair of eyelid pieces. When the rotating ring rotates, the fastener drives the pair of eyelid pieces to move in the moving track so as to move the pair of eyelid pieces away from or closer to each other. The base limiting member has a first limiting hole, and the protruding limiting member has a second limiting hole. The first limiting hole and the second limiting hole are used to limit the movement of the pair of eyelid members. The face contact pad has an opening whose size and structure match the second limiting hole.

8. The miniature fundus imaging device according to claim 7, characterized in that, The camera base includes: The battery box is detachably connected to one end opening of the outer cylinder; The camera is vertically fixed to the middle of the battery box and faces the eyelid; An LED light, vertically fixed to the battery box and located next to the camera; and A limiting plate is fitted onto the camera and the LED light and connected to the opening of the outer cylinder, with a gap between the limiting plate and the battery box.

9. The miniature fundus imaging device according to claim 8, characterized in that, The battery box has a power loading section for installing a power source and a box cover.

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