A portable fundus photograph auxiliary device

Abstract

This invention belongs to the field of ophthalmic examination instrument technology, specifically a portable fundus imaging auxiliary device, including an optical imaging module, an illumination module, a mask, a strap, and an electronic control system; it also includes a drive module, which is installed on the inner wall of the mask facing the eye, and the drive module drives the optical imaging module and the illumination module to move for alignment with the eye; the mask opening has a partition plate, which is vertically installed and located in the middle of the mask; when it is necessary to expand the mask to fit the patient, the knob is turned forward, the length of the adjustment ring increases and the adjustment mask is released, the adjustment mask swings and expands due to the influence of the torsion spring, the adjustment mask pulls the protective pads together to lengthen, so that the protective pads can maintain the fit with the patient's face as the coverage area expands, thereby increasing the contact area and contact effect between the mask and the patient, improving the stability of the mask wearing, and thus improving the accuracy of fundus imaging.

Description

Technical Field

[0001] This invention belongs to the field of eye examination instrument technology, specifically a portable fundus imaging auxiliary device. Background Technology

[0002] The fundus imaging auxiliary device, with its core component being a fundus camera, is a key piece of equipment in ophthalmology clinics used for non-invasive and objective recording of the fundus, including the morphology of the retina, optic nerve, macula, and choroid. It is the gold standard tool for screening, diagnosing, and following up on diseases such as diabetic retinopathy, glaucoma, and macular degeneration. The portable fundus imaging auxiliary device is a lightweight, portable, and low-cost fundus imaging solution that addresses the pain points of traditional desktop equipment, which is bulky, expensive, and required for fixed scenarios. It is widely used in primary care screening, bedside examinations, community clinics, and telemedicine.

[0003] However, in actual use, when the patient's face is oily or sweaty, the friction between the flexible mask and the skin decreases, making it prone to lateral slippage, which can cause optical path deviation, image defocusing, or field of view shift. Furthermore, the device relies solely on facial fit and hand pressure to maintain its posture; even slight head movements, blinking, or body displacement can cause the mask to loosen, altering the relative position of the camera and the eyeball, resulting in blurred images and poor repeatability. Moreover, different ages and face shapes can lead to uneven mask fit and gaps, allowing stray light from the outside to easily enter the optical path, causing artifacts such as corneal reflection and lens reflection, thus reducing image quality. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a portable fundus imaging auxiliary device.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention proposes a portable fundus imaging auxiliary device, including an optical imaging module, an illumination module, a mask, a strap, and an electronic control system; it also includes:

[0006] A drive module is installed on the inner wall of the mask facing the eyes. The drive module moves the optical imaging module and the illumination module to align with the eyes. The mask opening has a partition plate, which is vertically installed and located in the middle of the mask. A fixing plate is provided on the outward side of the partition plate. The fixing plates are symmetrically distributed on the partition plate and arranged vertically. A winding shaft is provided inside the partition plate. A fixing strap is provided inside the winding shaft. The fixing strap is slidably connected to the outward side of the fixing plate. A partition plate is provided on the inward side of the partition plate, and a wiping cloth is provided on the partition plate.

[0007] An adjustment cover is hinged to the opening end of the mask by a torsion spring. A shielding cloth is provided between adjacent adjustment covers, and the shielding cloth is rolled up inside one side of the adjustment cover. An adjustment ring is surrounded on the adjustment cover and fixed above the partition plate by a knob. A slider is slidably connected to the adjustment ring. One end of the adjustment cover is wrapped with an elastic protective pad, and one side of the slider contacts the protective pad.

[0008] Preferably, the slider is provided with a disinfectant cotton, which is convex in shape. A rotating rod is rotatably connected to the slider via a torsion spring. The rotating rod is connected to the teeth of the adjusting ring evenly distributed. The rotating rod is provided with a spiral groove and a squeezing plate. The inner side of the squeezing plate extends into the spiral groove. A squeezing airbag is provided between the squeezing plate and the slider. The air outlet of the squeezing airbag extends into the disinfectant cotton, and the air inlet faces outward. Cleaning chambers are provided on both sides of the adjusting cover away from the middle. A scraper is provided on the inner wall of the cleaning chamber. The scraper contacts the disinfectant cotton. A squeezing water bag is provided at the top of the cleaning chamber, and the top of the slider contacts the squeezing water bag. The water spray end of the squeezing water bag contacts the disinfectant cotton. The squeezing water bag contains disinfectant water.

[0009] Preferably, the cleaning chamber is provided with a positioning block, and the positioning block is made of hard rubber, and the positioning block contacts the top of the ear.

[0010] Preferably, a cleaning sheet is slidably connected inside the slider by a spring, with one end of the cleaning sheet close to the squeezing sheet and the other end in contact with the disinfectant cotton.

[0011] Preferably, one side of the cleaning sheet is provided with a roller rotatably connected to it, and the end of the roller has a protective pad.

[0012] Preferably, the roller is fitted with wiping cotton, and the wiping cotton is in contact with the protective pad.

[0013] Preferably, the protective pad has uniformly arranged folded strips inside, which are folded inward toward the face mask.

[0014] Preferably, the folding strip is connected to a portion of the shielding cloth. When the folding strip is folded and stored, the portion of the shielding cloth extends into the folded portion of the protective pad. When the folding strip is unfolded, the portion of the shielding cloth is pulled away from one side of the protective pad.

[0015] Preferably, a torsion bar is rotatably connected to the adjusting cover, the torsion bar is located in the middle of the adjusting cover, and one side of the torsion bar is connected to the fixing belt.

[0016] Preferably, the torsion bar is provided with positioning rubber strips at the top and bottom, and the positioning rubber strips are located above and below the adjustment cover.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The portable fundus imaging auxiliary device of the present invention, when it is necessary to expand the adjustment cover to fit the patient, the knob is turned in the forward direction, the length of the adjustment ring increases and the adjustment cover is loosened. The adjustment cover is affected by the torsion spring and swings and expands with each other. The adjustment cover pulls the protective pad with each other, causing it to stretch. This allows the protective pad to maintain the degree of fit with the patient's face as the coverage area expands, thereby increasing the contact area and contact effect between the mask and the patient, improving the stability of the mask wearing, and thus improving the accuracy of fundus imaging.

[0019] 2. The portable fundus imaging auxiliary device of the present invention, when the adjustable covers swing away from each other, the stored shielding cloth is pulled out to block the gaps between the adjustable covers, avoiding the influence of external light on fundus imaging, improving the accuracy of fundus imaging, and thus improving the accuracy of patient eye diagnosis; the protective pad fills the gap between the adjustable cover and the patient's facial skin, and together with the shielding cloth, further improves the light-blocking effect of the mask, so that the illumination module can provide more precise lighting at the shooting angle, further improving the accuracy of fundus imaging. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 It is a cross-sectional view of the mask from a top-down perspective;

[0023] Figure 3 yes Figure 2 A schematic diagram showing the middle slider entering the cleaning chamber;

[0024] Figure 4 yes Figure 2 A schematic diagram of the folded strip inside the protective pad;

[0025] Figure 5 This is a cross-sectional view of the cleaning chamber;

[0026] Figure 6 This is a cross-sectional view of the slider.

[0027] In the diagram: 1. Face mask, 11. Drive module, 12. Divider plate, 13. Fixing plate, 14. Rewinding shaft, 15. Fixing strap, 16. Divider plate, 17. Wiping cloth, 18. Adjusting cover, 19. Covering cloth, 2. Adjusting ring, 21. Slider, 22. Protective pad, 23. Disinfecting cotton, 24. Rotating rod, 25. Spiral groove, 26. Squeezing plate, 27. Squeezing airbag, 28. Cleaning chamber, 29. Squeezing water bag, 31. Positioning block, 32. Cleaning plate, 33. Roller, 34. Wiping cotton, 35. Folding strip, 36. Torsion rod, 37. Positioning rubber strip. Detailed Implementation

[0028] 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.

[0029] Example 1:

[0030] To effectively solve the above problems, see the attached diagram in the instruction manual. Figures 1-6 As shown, a portable fundus imaging aid includes an optical imaging module, an illumination module, a mask 1, a strap, and an electronic control system; it also includes:

[0031] A drive module 11 is installed on the inner wall of the mask 1 facing the eyes. The drive module 11 drives the optical imaging module and the illumination module to move for alignment with the eyes. The mask 1 has a partition plate 12 at the opening end. The partition plate 12 is vertically installed and located in the middle of the mask 1. A fixing piece 13 is provided on the outward side of the partition plate 12. The fixing pieces 13 are symmetrically distributed on the partition plate 12 and arranged vertically. A winding shaft 14 is provided inside the partition plate 12. A fixing strap 15 is provided inside the winding shaft 14. The fixing strap 15 is slidably connected to the outward side of the fixing piece 13. A partition plate 16 is provided on the inward side of the partition plate 12, and a wiping cloth 17 is provided on the partition plate 16.

[0032] An adjustment cover 18 is hinged to the opening end of the mask 1 by a torsion spring. A shielding cloth 19 is provided between adjacent adjustment covers 18, and the shielding cloth 19 is rolled up inside one side of the adjustment cover 18. An adjustment ring 2 is surrounded on the adjustment cover 18, and the adjustment ring 2 is fixed above the partition plate 12 by a knob. A slider 21 is slidably connected to the adjustment ring 2. One end of the adjustment cover 18 is wrapped with an elastic protective pad 22, and one side of the slider 21 contacts the protective pad 22.

[0033] The drive module 11 is a conventional moving device used to move the optical imaging module and the illumination module within the mask 1 to capture fundus images of the left or right eye as needed. Furthermore, the user can remove the drive module 11 and replace it with manual operation, and use a mobile phone to replace the optical imaging module and illumination module, for example, by fixing the camera in front of the left or right eye of the mask 1 and manually taking pictures using the collected optical image and illumination. The take-up shaft 14 can be a conventional shaft that slides within the partition plate 12 via a spring. The spring force on the take-up shaft 14 enables... The tightening of the fixing strap 15, for example, when the fixing strap 15 is attached to the patient's nose bridge, the fixing strap 15 bends and lengthens, and the retractor 14 moves to loosen the fixing strap 15, so that the fixing strap 15 can fit more closely to the patient's nose bridge. When the fixing strap 15 is away from the patient's nose bridge, the retractor 14 moves to tighten the fixing strap 15, and the fixing straps 15 between adjacent fixing pieces 13 return to a taut state; the wiping cloth 17 is a tool commonly used for wiping the optical imaging module and the illumination module; the adjusting ring 2 binds the adjusting cover 18 together, and the knob fixes the adjusting ring 2 and is used to adjust the tightness of the adjusting ring 2;

[0034] Specific workflow: When wearing mask 1, the patient secures mask 1 by wrapping the strap around the back of the head once. At this time, mask 1 moves the adjustment cover 18 closer to the patient's eyes. The adjustment cover 18 contacts the patient's skin through the elastic or sponge protective pad 22. When it is necessary to expand the fit of the adjustment cover 18 to the patient, the knob is turned in the forward direction, the length of the adjustment ring 2 increases and the adjustment cover 18 is released. The adjustment cover 18 swings and expands due to the influence of the torsion spring. The adjustment cover 18 pulls the protective pad 22 to stretch it, so that the protective pad 22 can maintain the fit with the patient's face as the coverage area expands. This increases the contact area and contact effect between mask 1 and the patient, improves the stability of wearing mask 1, and thus improves the accuracy of fundus imaging.

[0035] Furthermore, when the adjustment covers 18 swing away from each other, the stored shielding cloth 19 is pulled out, blocking the gaps between the adjustment covers 18, preventing external light from affecting the fundus photography, improving the accuracy of fundus photography, and thus improving the accuracy of patient eye diagnosis; the protective pad 22 fills the gap between the adjustment cover 18 and the patient's facial skin, and together with the shielding cloth 19, further improves the light-blocking effect of the mask 1, so that the lighting module can provide more precise lighting for the shooting angle, further improving the accuracy of fundus photography;

[0036] Furthermore, after the adjustment cover 18 is adjusted and the knob is fixed, the adjustment ring 2 is also fixed. At this time, the slider 21 is located near the patient's nose bridge. The person holds the two sliders 21 and moves them to the side away from each other. The sliders 21 move and scrape over the protective pad 22 to clean the protective pad 22, improve the cleanliness of the protective pad 22, and avoid the protective pad 22 having impurities such as facial oil on it, which would make the protective pad 22 slippery and cause the mask 1 to become unstable if the patient moves slightly. The sliders 21 move to the sides of the adjustment cover 18, that is, the part near the patient's temples. The patient's temples are soft and easily injured or painful due to wearing. The sliders 21 block the area near the patient's temples and lift the straps and other parts away from this area to avoid wearing discomfort. This improves the protection of the patient and the comfort of wearing the device, thereby improving the practicality of the device.

[0037] When the mask 1 is worn, the mask 1 moves the partition plate 12 vertically in front of the bridge of the nose, which provides a separation between the patient's left and right eyes. When the left eye is photographed, the ambient light and reflected light of the right eye will not enter the imaging light path. The partition plate 12 physically blocks the light transmission between the left and right eyes, reduces glare, white fog and artifacts in the fundus image, improves the imaging quality of fundus photography, and thus improves the accuracy of fundus photography.

[0038] Furthermore, the device emits illumination light during fundus imaging. Without a separator, the strong light will simultaneously stimulate the other eye, causing the patient to blink frequently, move their eyeballs, and turn their head back, directly resulting in blurred images. The separator 12 can significantly reduce this cross-stimulation, improve patient cooperation, thereby increasing the success rate of imaging, avoiding repeated imaging, improving the efficiency of fundus imaging, and thus improving the efficiency of the device.

[0039] Moreover, the partition plate 12 is close to the center of the bridge of the nose, which is equivalent to a mechanical positioning reference, so that the mask 1 and the optical lens are always aligned with the center of the eye being examined, avoiding problems such as lateral deviation of the device, inaccurate pupillary distance, and only capturing the edge of the retina, thus improving the imaging quality of fundus imaging and improving the accuracy of fundus imaging; it can also work with the mask 1 to form a local light-blocking space, reducing the entry of external stray light such as indoor lights and window light into the light path, making the fundus imaging more contrasting and the details clearer;

[0040] In addition, when switching between the left and right eyes, only the drive module 11 needs to move the optical imaging module and the illumination module, while other fixed parts remain stationary, ensuring that the posture is consistent for both shots. This facilitates the doctor's comparison of the fundus condition of both eyes and improves the accuracy of eye diagnosis. When the optical imaging module and the illumination module move, they pass through the wiping cloth 17 on the separator 16. The wiping cloth 17 cleans the optical imaging module and the illumination module, ensuring that each shot is not affected by impurities, improving the clarity of the image, and thus improving the accuracy of fundus imaging.

[0041] When wearing the mask 1, the partition 12, through the fixing piece 13, moves the fixing strap 15 closer to the patient's nose bridge. When the fixing strap 15 is attached to the patient's nose bridge, the fixing piece 13 remains stationary on both sides of the patient's nose bridge. The fixing strap 15 between adjacent fixing pieces 13 is bent and lengthened by the pressure of the nose bridge. The retractor 14 moves to loosen the fixing strap 15, allowing the auxiliary fixing strap 15 to fit more closely to the patient's nose bridge. The fixing piece 13 positions the nose bridge and, through the fixing strap 15, fixes the mask 1 with the nose bridge as a reference, increasing the positioning and fixing method of the mask 1 based on the nose bridge. To improve the accuracy of fundus imaging, the fixation is used to reduce the instability of the mask 1 caused by the patient turning their head. The fixation function of the fixation plate 13, the binding function of the strap, the auxiliary fixation function of the slider 21, and the contact fixation function of the protective pad 22 improve the stability of the device during wearing and use, and prevent the mask 1 from moving due to the patient's movement during use, which would affect the imaging. When the fixation strap 15 is away from the patient's nose bridge, the rewind shaft 14 moves to tighten the fixation strap 15, and the fixation strap 15 between adjacent fixation plates 13 returns to a taut state.

[0042] Example 2:

[0043] Based on Embodiment 1, the slider 21 is provided with disinfectant cotton 23, which has a convex shape. A rotating rod 24 is rotatably connected to the slider 21 through a torsion spring. The rotating rod 24 is connected to the teeth evenly distributed on the adjusting ring 2. The rotating rod 24 is provided with a spiral groove 25 and a squeezing plate 26. The inner side of the squeezing plate 26 extends into the spiral groove 25. A squeezing airbag 27 is provided between the squeezing plate 26 and the slider 21. The air outlet of the squeezing airbag 27 extends into the disinfectant cotton 23, and the air inlet faces outward. The adjusting cover 18 is provided with cleaning chambers 28 on both sides away from the middle. A scraper 29 is provided on the inner wall of the cleaning chamber 28. The scraper 29 contacts the disinfectant cotton 23. A squeezing water bag 3 is provided at the top of the cleaning chamber 28, and the top of the slider 21 contacts the squeezing water bag 3. The water spray end of the squeezing water bag 3 contacts the disinfectant cotton 23. The squeezing water bag 3 contains disinfectant water.

[0044] The cleaning chamber 28 is provided with a positioning block 31, which is made of hard rubber and contacts the top of the ear.

[0045] The cleaning sheet 32 ​​is slidably connected to the slider 21 by a spring. One end of the cleaning sheet 32 ​​is close to the squeezing sheet 26, and the other end is in contact with the disinfectant cotton 23.

[0046] The cleaning sheet 32 ​​is provided with a roller 33 rotatably connected on one side, and the end of the roller 33 has a protective pad 22 for pushing.

[0047] The roller 33 is fitted with a wiping cotton 34, and the wiping cotton 34 contacts the protective pad 22;

[0048] Specific workflow: When slider 21 moves, it moves the disinfectant cotton 23 to wipe the protective pad 22 while simultaneously wiping the skin around the patient's eyes, improving cleanliness and thus enhancing the anti-slip effect and wearing stability. It also allows for quick cleaning of the protective pad 22 and skin each time the pad is worn, preventing cross-contamination. The convex shape of the disinfectant cotton 23 minimizes the volume of the part near the protective pad 22, reducing deformation caused by compression during cleaning and minimizing pressure on the patient's skin, thus improving patient comfort during the cleaning process.

[0049] Slider 21 moves into cleaning chamber 28. The top of slider 21 penetrates the top of cleaning chamber 28, providing a protruding part for easy movement within the chamber. Slider 21 moves disinfectant cotton 23 within the chamber, while scraper 29 scrapes the cotton 23, removing dirt and impurities that fall to the bottom of the chamber, improving its cleanliness and thus enhancing the cleaning effect. Furthermore, after entering the chamber, slider 21 contacts and squeezes the water-squeezing bag 3, gradually squeezing out disinfectant water. This water moistens the cotton 23, providing cleaning and disinfection, further improving the cleaning effect of slider 21. Then, slider 21 is removed from the chamber, and scraper 29 squeezes out excess disinfectant water from the cotton 23, preventing it from contacting the skin. After being moistened, the cotton 23 moves again between the cleaning protective pad 22 and the patient's skin before returning to the chamber for storage. It can also be moved near the patient's temples for support.

[0050] Furthermore, when the slider 21 moves, the rotating rod 24 engages with the evenly distributed teeth on the adjusting ring 2, causing the rotating rod 24 to periodically contact the teeth on the adjusting ring 2 during movement and rotate. The rotation of the rotating rod 24 causes the squeezing plate 26 to rotate through the spiral groove 25, while the outer periphery of the squeezing plate 26 slides up and down with the inner wall of the slider 21, thus restricting the squeezing plate 26 to slide up and down along the rotating rod 24 following the spiral groove 25. The rise and fall of the squeezing plate 26 causes the squeezing airbag 27 to expand and contract. The squeezing airbag 27 sprays air into the disinfectant cotton 23, accelerating the evaporation of disinfectant water, such as disinfectant alcohol, in the disinfectant cotton 23, increasing the dryness of the disinfectant cotton 23, and reducing the occurrence of the disinfectant cotton 23 being too wet, which may affect the patient's ability to open their eyes, thereby improving the fundus imaging effect. The air sprayed from the disinfectant cotton 23 by the squeezing airbag 27 comes into contact with the patient's skin, increasing the dryness of the disinfectant water after wiping, and avoiding disinfectant water residue in the eyes, which may affect the patient's comfort. When the squeezing airbag 27 contracts, it draws air out through the suction end.

[0051] By setting the positioning block 31, when the mask 1 is worn, the rubber positioning block 31 rests against the top of the patient's ear, providing upward support for the mask 1. This ensures that the mask 1 can provide sufficient support when the patient raises or lowers their head, improving the stability of the mask 1 during use and thus improving the accuracy of fundus imaging. Furthermore, the positioning block 31 can be set as a sliding connection, allowing it to be flexibly adjusted according to the position of different patients' ears, improving ease of use.

[0052] When the squeezing plate 26 slides up and down, it squeezes the cleaning plate 32 and moves it to contact the protective pad 22, achieving the purpose of hard scraping and cleaning, and improving the cleanliness; when the squeezing plate 26 slides away from the cleaning plate 32, the cleaning plate 32 moves back to its original position due to the influence of the spring, and the cleaning plate 32 scrapes the disinfection cotton 23, scraping away the impurities on the disinfection cotton 23, and improving the cleanliness of the disinfection cotton 23.

[0053] By setting up roller 33, the cleaning plate 32 moves roller 33, which in turn moves and pushes the protective pad 22. This movement creates a gap, allowing roller 33 to move between the protective pad 22 and the patient's skin. Roller 33 then contacts and wipes the protective pad 22 through wiping cotton 34, improving the cleanliness of the protective pad 22. Furthermore, while moving and wiping the protective pad 22, roller 33 also flattens and tightens the pad, making its surface smoother and wrinkle-free. This allows the mask 1 to fit more tightly against the face, reducing light leakage, loosening, and slippage, thus improving shooting stability. During the wiping process, wiping cotton 34 removes grease, sweat, cosmetic residue, and dust from the inside of the protective pad 22.

[0054] This increases the friction between the protective pad 22 and the skin, significantly improving the slippage and positioning misalignment of the mask 1 caused by facial oiliness. Moreover, the movement and agitation of the roller 33 can regulate and reset the protective pad 22, ensuring that the protective pad 22 maintains the correct shape and position after multiple uses, improving the repeatability of the mask 1 device and extending its service life.

[0055] Example 3:

[0056] Based on Embodiment 2, the protective pad 22 is provided with folding strips 35 evenly inside, and the folding strips 35 are folded inward toward the face mask 1;

[0057] The folding strip 35 is connected to a portion of the shielding cloth 19. When the folding strip 35 is folded and stored, the portion of the shielding cloth 19 extends into the folded portion of the protective pad 22. When the folding strip 35 is unfolded, the portion of the shielding cloth 19 is pulled away from one side of the protective pad 22.

[0058] Specific workflow: When the protective pad 22 is stretched and unfolded, the folding strip 35 unfolds simultaneously. Since the folding direction of the folding strip 35 faces the patient's face, the folding strip 35 can fold and fit according to the actual shape of the patient's face. It can adaptively deform and fold according to different patients' facial contours, nose bridge height, and periorbital curvature, so that the protective pad 22 fits tightly to the skin, reducing gaps, light leakage, and displacement, and improving the stability of the optical path and image quality during fundus imaging. Furthermore, through the adaptive fit of the folding strip 35 to the face, the gap between the protective pad 22 and the skin is reduced, effectively blocking external ambient light from entering the imaging optical path, reducing corneal reflection, light spots, artifacts, and other problems, and improving the clarity of fundus images.

[0059] When the folding strip 35 is folded and stored, the shielding cloth 19 extends into the folded parts of the protective pad 22 and wipes the contact surfaces of the protective pad 22 during relative movement. This removes residual grease, sweat, and dust, automatically achieving a cleaning function and ensuring the device is hygienic for reuse. Furthermore, the shielding cloth 19 acts as an insulating medium between the folded surfaces of the protective pad 22, preventing the protective pads 22 from directly contacting each other in the stored state. This avoids the transfer, adhesion, and bacterial growth of dirt between the contact surfaces, improving the safety and hygiene of reuse. Through the flexible deformation of the folding strip 35 and the isolation and protection of the shielding cloth 19, the wear, adhesion, and deformation caused by repeated folding of the protective pad 22 are reduced, allowing the protective pad 22 to maintain good fit and structural stability after multiple opening and closing. When the folding strip 35 is unfolded, part of the shielding cloth 19 is pulled away from one side of the protective pad 22.

[0060] Example 4:

[0061] Based on Embodiment 3, a torsion rod 36 is rotatably connected to the adjustment cover 18. The torsion rod 36 is located in the middle part of the adjustment cover 18, and one side of the torsion rod 36 is connected to the fixing belt 15.

[0062] The torsion bar 36 is provided with positioning rubber strips 37 at its top and bottom, and the positioning rubber strips 37 are located above and below the adjustment cover 18;

[0063] Specific workflow: By setting the torsion bar 36, when the slider 21 is stationary, part of the disinfectant cotton 23 contacts the fixing plate 13 and the fixing belt 15. Personnel drive the fixing belt 15 to rotate through the torsion bar 36, and the disinfectant cotton 23 cleans and disinfects the fixing plate 13 and the fixing belt 15, thereby improving the cleanliness of the device and the hygiene of repeated use.

[0064] By setting the positioning strip 37, and since the torsion rod 36 is located in the middle of the adjustment cover 18, a clear and intuitive central axis reference can be formed. The operator can quickly align it with the midline of the patient's nasal bridge, keeping the mask 1 centered and avoiding left and right deviation. This ensures that the optical lens is coaxially aligned with the examined eye. Combined with the positioning functions of the separator 12 and the positioning block 31, the positioning accuracy of the mask 1 is improved, thereby improving the accuracy of fundus imaging. Furthermore, each time the mask is worn, it is aligned with the nasal bridge using the central torsion rod 36 as a reference. This ensures that the mask 1 maintains a consistent positioning posture across multiple uses and different patients, guaranteeing that the imaging angle and optical path conditions are basically consistent, thus improving the comparability and stability of fundus images. Moreover, the clear central reference structure simplifies the alignment logic. Even in non-professional scenarios such as grassroots screening and free clinics, the operator can quickly and accurately position the mask 1, reducing human error.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable fundus imaging aid, comprising an optical imaging module, an illumination module, a mask (1), a strap, and an electronic control system; characterized in that, Also includes: A drive module (11) is installed on the inner wall of the mask (1) facing the eyes. The drive module (11) drives the optical imaging module and the illumination module to move for aiming at the eyes. The mask (1) has a partition plate (12) at the opening end. The partition plate (12) is installed vertically and located in the middle of the mask (1). A fixing piece (13) is provided on the outer side of the partition plate (12). The fixing pieces (13) are symmetrically distributed on the partition plate (12) and arranged vertically. A winding shaft (14) is provided inside the partition plate (12). A fixing strap (15) is provided inside the winding shaft (14). The fixing strap (15) is slidably connected to the outer side of the fixing piece (13). A partition piece (16) is provided on the inner side of the partition plate (12), and a wiping cloth (17) is provided on the partition piece (16). An adjustment cover (18) is hinged to the opening end of the mask (1) by a torsion spring. A shielding cloth (19) is provided between adjacent adjustment covers (18), and the shielding cloth (19) is rolled up inside one side of the adjustment cover (18). An adjustment ring (2) is surrounded on the adjustment cover (18), and the adjustment ring (2) is fixed above the partition plate (12) by a knob. A slider (21) is slidably connected on the adjustment ring (2), and an elastic protective pad (22) is wrapped around one end of the adjustment cover (18).

2. The portable fundus imaging auxiliary device according to claim 1, characterized in that: The slider (21) is provided with a disinfectant cotton (23), which is convex in shape. A rotating rod (24) is rotatably connected to the slider (21) through a torsion spring. The rotating rod (24) is connected to the teeth of the adjusting ring (2) evenly distributed. The rotating rod (24) is provided with a spiral groove (25) and a squeezing plate (26) is provided on the rotating rod (24). The inner side of the squeezing plate (26) extends into the spiral groove (25). A squeezing airbag (27) is provided between the squeezing plate (26) and the slider (21) for squeezing. The air outlet of the airbag (27) extends into the disinfectant cotton (23), and the air inlet faces outward; the adjustment cover (18) is provided with cleaning chambers (28) on both sides away from the middle, and a scraper (29) is provided on the inner wall of the cleaning chamber (28). The scraper (29) contacts the disinfectant cotton (23). A squeezing water bag (3) is provided on the top of the cleaning chamber (28), and the top of the slider (21) contacts the squeezing water bag (3). The water spraying end of the squeezing water bag (3) contacts the disinfectant cotton (23), and disinfectant water is provided inside the squeezing water bag (3).

3. The portable fundus imaging auxiliary device according to claim 2, characterized in that: The cleaning chamber (28) is provided with a positioning block (31), and the positioning block (31) is made of hard rubber and contacts the top of the ear.

4. The portable fundus imaging auxiliary device according to claim 3, characterized in that: The cleaning sheet (32) is slidably connected to the slider (21) by a spring. One end of the cleaning sheet (32) is close to the squeezing sheet (26), and the other end is in contact with the disinfectant cotton (23).

5. A portable fundus imaging auxiliary device according to claim 4, characterized in that: The cleaning plate (32) has a roller (33) rotatably connected to one side, and the end of the roller (33) has a protective pad (22).

6. A portable fundus imaging auxiliary device according to claim 5, characterized in that: The roller (33) is fitted with a wiping cotton (34), and the wiping cotton (34) contacts the protective pad (22).

7. A portable fundus imaging auxiliary device according to claim 6, characterized in that: The protective pad (22) is uniformly provided with folding strips (35) inside, and the folding strips (35) are folded inward toward the face mask (1).

8. A portable fundus imaging auxiliary device according to claim 7, characterized in that: The folding strip (35) is connected to a portion of the covering cloth (19). When the folding strip (35) is folded and stored, the portion of the covering cloth (19) extends into the folded part of the protective pad (22). When the folding strip (35) is unfolded, the portion of the covering cloth (19) is pulled away from one side of the protective pad (22).

9. A portable fundus imaging auxiliary device according to claim 8, characterized in that: A torsion bar (36) is rotatably connected to the adjustment cover (18). The torsion bar (36) is located in the middle of the adjustment cover (18), and one side of the torsion bar (36) is connected to the fixing belt (15).

10. A portable fundus imaging auxiliary device according to claim 9, characterized in that: The torsion bar (36) is provided with positioning strips (37) at the top and bottom, and the positioning strips (37) are located above and below the adjustment cover (18).

Images