Vision board

Abstract

The utility model relates to a vision board, which comprises a vision board main body provided with a test hole for vision examination; and the adjusting plate is movably arranged on the vision board main body, a through hole matched with the shape of the test hole is formed in the adjusting plate, and the position of the through hole can be adjusted by controlling the adjusting plate to move, so that the through hole is overlapped and communicated with the test hole and staggered from the test hole to shield the test hole. According to the vision board, through the matched design of the adjusting plate and the testing holes, an extra small-hole black film or other auxiliary tools are not needed any more, a subject can directly adjust the adjusting plate on the vision board to rapidly switch to a small-hole vision examination mode, and the vision board has the functions of small-hole vision examination and normal vision examination at the same time; the practicability of the vision board is improved, the requirement for replacing or adding additional auxiliary tools in the examination process is reduced, and the complexity and time cost in the examination process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vision testing, and more particularly to a vision card. Background Art

[0002] Vision is a crucial way for humans to perceive external information and is crucial for daily life, study, and work. Therefore, regular vision exams and timely detection and correction of vision problems are crucial for protecting eye health and preventing eye diseases.

[0003] When a routine vision test reveals that a person's visual acuity is less than 1.0, a pinhole vision test may be recommended to further assess the extent of visual impairment and determine whether there is refractive error or other problems. The pinhole vision test uses a pinhole black film to reduce the impact of refractive error on vision, thereby more accurately assessing the person's true visual acuity level.

[0004] Currently, the pinhole vision test typically involves the examinee standing about 5 meters away from an eye chart, completely covering one eye, placing a pinhole black film in front of the other eye, viewing the chart through the pinhole, and attempting to recognize characters or graphics. The operator records the visual acuity at this point, then changes the covered eye and repeats the process. However, the currently used vision cards can only be used to cover one eye for normal vision testing. For pinhole vision testing, additional pinhole black film is needed to assist with the test, or additional holes must be drilled in the original card. This single function increases the complexity and time cost of the test. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a vision card in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Construct a vision card, including:

[0008] The main body of the vision card has a test hole for vision testing;

[0009] An adjustment plate is movably arranged on the vision sign body. The adjustment plate is provided with a through hole that matches the shape of the test hole. The position of the through hole can be adjusted by controlling the movement of the adjustment plate so that the through hole overlaps with the test hole and is connected, or is staggered with the test hole to block it.

[0010] As an improvement of the vision sign, the adjustment plate is rotatably connected to the vision sign body.

[0011] As an improvement of the vision sign, one side of the vision sign body is at least partially recessed to form a groove, and the adjustment plate is located in the groove.

[0012] As an improvement of the vision sign, the vision sign body includes a shielding portion and a handle portion connected to a middle position of one side of the shielding plate, and the adjustment plate is close to the handle portion.

[0013] As an improvement of the vision sign, it further includes a limiting component arranged between the adjustment plate and the handle, and the limiting component cooperates with the adjustment plate to limit the adjustment plate in a state where the through hole and the test hole overlap and in a state where the through hole and the test hole are offset.

[0014] As an improvement of the vision sign, the limit assembly includes a limit rod, an elastic member and at least two groups of limit members, the two groups of limit members are respectively arranged on both sides of the adjustment plate, one group of limit members includes at least two limit blocks, and a slot that can cooperate with the limit rod is formed between the two limit blocks. The limit rod is arranged on the handle part and can be slid along the length direction of the handle part to be inserted into the slot and removed from the slot. The two ends of the elastic member are respectively connected to the limit rod and the bottom of the slide groove.

[0015] As an improvement to the vision sign, a first magnet is provided on both opposite sides of the groove, and a second magnet with opposite magnetic properties to the first magnet is provided on the side of the adjustment plate facing the bottom of the groove. The second magnet cooperates with the first magnets on both sides to position the adjustment plate in a state where the through hole and the test hole overlap and in a state where the through hole and the test hole are staggered.

[0016] As an improvement of the vision sign, a handle is provided on the side of the adjustment plate facing away from the vision sign body, and the adjustment plate can be rotated by the handle.

[0017] As an improvement to the vision card, at least a portion of the cross section of the handle is elliptical.

[0018] As an improvement to the vision sign, the handle portion and the shielding portion are detachably connected.

[0019] The beneficial effects of the present invention are as follows: the vision card is designed to cooperate with the adjustment plate and the test hole, so there is no need to use additional pinhole black film or other auxiliary tools. The examinee can directly switch to the pinhole vision test mode by adjusting the adjustment plate on the vision card, so that it has the functions of performing pinhole vision test and normal vision test at the same time, which improves the practicality of the vision card, reduces the need to replace or add additional auxiliary tools during the inspection process, and reduces the complexity and time cost of the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0021] Figure 1 This is a three-dimensional structural diagram of a vision sign provided by the utility model;

[0022] Figure 2 This is an enlarged view of point A of a vision sign provided by the utility model;

[0023] Figure 3 This is one of the three-dimensional structural diagrams of the shielding portion of a vision sign provided by the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of an adjustment plate of a vision sign provided by the utility model;

[0025] Figure 5 This is the second schematic diagram of the three-dimensional structure of the shielding portion of a vision sign provided by the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the handle and the limiting assembly of a vision sign provided by the utility model;

[0027] Figure 7 This is a cross-sectional view of a partial structure of a vision sign provided by the utility model;

[0028] Figure 8 It is an enlarged view of point B of a vision sign provided by the utility model.

[0029] In the figure: 1. Vision card body; 11. Shielding part; 12. Handle part; 13. Test hole; 14. Groove; 2. Adjustment plate; 21. Through hole; 22. Handle; 3. Limiting assembly; 31. Limiting rod; 32. Elastic part; 33. Limiting block; 34. Card slot; 4. First magnet; 5. Second magnet. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 5 As shown, a vision sign includes a vision sign body 1 and an adjustment plate 2. The vision sign body 1 is provided with a test hole 13 for vision testing; the adjustment plate 2 is movably arranged on the vision sign body 1, and the adjustment plate 2 is provided with a through hole 21 that matches the shape of the test hole 13. The position of the through hole 21 can be adjusted by controlling the movement of the adjustment plate 2 so that the through hole 21 coincides with and connects with the test hole 13, or is offset from the test hole 13 to block it.

[0032] Specifically, when a pinhole vision test is required, the adjustment plate 2 is controlled to move (e.g., rotate or slide) so that the through hole 21 on the adjustment plate 2 coincides with the test hole 13 on the vision card body 1. The adjustment plate 2 no longer blocks the test hole 13, and the examinee can view the eye chart through the open test hole 13 to perform a pinhole vision test. When a normal vision test is required, the adjustment plate 2 is simply controlled to move so that the through hole 21 is offset from the test hole 13, so that the adjustment plate 2 blocks the test hole 13, resulting in a closed state. The examinee can then use the vision card to block either the right or left eye and perform a normal vision test.

[0033] The vision card is designed to cooperate with the adjustment plate 2 and the test hole 13, so there is no need to use additional pinhole black film or other auxiliary tools. The examinee can quickly switch to the pinhole vision test mode by directly adjusting the adjustment plate 2 on the vision card, so that it has the functions of performing pinhole vision tests and normal vision tests at the same time, which improves the practicality of the vision card, reduces the need to replace or add additional auxiliary tools during the examination process, and reduces the complexity and time cost of the examination process.

[0034] In some embodiments of the present application, the adjustment plate 2 is rotatably connected to the vision card body 1. The examinee or operator can control the position of the through hole 21 thereon by rotating the adjustment plate 2. When a pinhole vision test is required, the through hole 21 is rotated to a position that overlaps with the test hole 13 on the vision card body 1; when a normal vision test is required, the through hole 21 is rotated to a position offset from the test hole 13, so that the test hole 13 is blocked. The examinee or operator only needs to simply rotate the adjustment plate 2 to switch the inspection mode, which effectively simplifies the operation process and reduces the complexity and time cost of the inspection process.

[0035] In some embodiments of the present application, one side of the vision sign body 1 is partially recessed to form a groove 14, and the adjustment plate 2 is located in the groove 14. Specifically, the adjustment plate 2 is designed to be embedded in the groove 14, and is limited by the boundary of the groove 14 to ensure that the adjustment plate 2 does not separate from the vision sign body 1 when moving or rotating. The design of the groove 14 provides additional protection for the adjustment plate 2, avoiding external impact or damage during carrying, use or storage. By embedding the adjustment plate 2 in the groove 14, the volume and occupied space of the entire vision sign are reduced, making it more compact and portable. The groove 14 limits the adjustment plate 2, ensuring the stability of the adjustment plate 2 during movement or rotation, and preventing the accuracy of the inspection results from being affected by shaking or offset.

[0036] In some embodiments of the present application, the vision sign body 1 includes a shielding portion 11 and a handle portion 12 connected to the middle position of one side of the shielding plate, and the adjustment plate 2 is close to the handle portion 12 .

[0037] In some embodiments of the present application, Figures 6 to 8 As shown, the apparatus further includes a limit assembly 3 disposed between the adjustment plate 2 and the handle. The limit assembly 3 cooperates with the adjustment plate 2 to limit the position of the adjustment plate 2 when the through hole 21 and the test hole 13 overlap, or when the through hole 21 and the test hole 13 are offset. Specifically, the limit assembly 3 ensures that the adjustment plate 2 stops moving when it reaches a preset position, thereby achieving precise control of the overlap between the through hole 21 and the test hole 13 and improving the accuracy and reliability of the inspection. The locking function of the limit assembly 3 effectively prevents the position of the adjustment plate 2 from shifting due to misoperation or external interference, thereby protecting the safety of the equipment and the examinee.

[0038] In some embodiments of the present application, the limiting assembly 3 includes a limiting rod 31, an elastic member 32, and at least two groups of limiting members, the two groups of limiting members being respectively arranged on either side of the adjustment plate 2, wherein one group of limiting members includes at least two limiting blocks 33, a slot 34 being formed between the two limiting blocks 33 and being capable of cooperating with the limiting rod 31, the limiting rod 31 being arranged on the handle portion 12 and being slidable along the length of the handle portion 12 into and out of the slot 34, the two ends of the elastic member 32 being respectively connected to the limiting rod 31 and the bottom of the slide. Specifically, the elastic member 32 is a spring, the limiting rod 31 is located on the handle portion 12 in a slidable position, the two ends of the elastic member 32 being respectively connected to the limiting rod 31 and the bottom of the slide, providing an outward elastic force to the limiting rod 31, so that it maintains a certain position when no external force is applied. When the cam 31 is in the initial state, the cam 31 is inserted into the slot 34 on the corresponding side; when the position of the through hole 21 of the adjustment plate 2 needs to be adjusted, the user operates the handle portion 12 to push the cam 31 to slide along the length direction of the handle portion 12, and the elastic member 32 is deformed. As the cam 31 slides, when the cam 31 moves out of the slot 34, the limit on the adjustment plate 2 is released, and then the adjustment plate 2 can be rotated to adjust the position of the through hole 21. After the adjustment, the cam 31 is aligned with the slot 34 formed by the limit block 33 in a certain group of limit members, and the elastic member 32 drives the cam 31 to reset and insert into the slot 34 through the rebound force. Due to the constraint of the slot 34, the further movement of the adjustment plate 2 at this position is limited.

[0039] The precise fit between the limiting rod 31 and the slot 34 allows precise control of the position of the adjustment plate 2, ensuring that the through hole 21 and the test hole 13 are accurately aligned or offset. The user can adjust and lock the position of the adjustment plate 2 simply by sliding the limiting rod 31, making operation simple and quick, improving work efficiency.

[0040] Specifically, the handle portion 12 is provided with a sliding groove for the limiting rod 31 to slide, and an active hole communicating with the outside is provided on the inner wall of the sliding groove. The limiting rod 31 has a transmission part, which protrudes outward through the active hole.

[0041] In some embodiments of the present application, first magnets 4 are disposed on opposite sides of the groove 14. A second magnet 5 with opposite magnetic properties to the first magnet 4 is disposed on the side of the adjustment plate 2 facing the bottom of the groove 14. The second magnets 5 cooperate with the first magnets 4 on either side to position the adjustment plate 2 when the through hole 21 and the test hole 13 are aligned or offset. Specifically, when the first magnets 4 and the second magnets 5 have opposite magnetic properties, they generate a mutual magnetic attraction. When the adjustment plate 2 is moved to a position where the through hole 21 and the test hole 13 are aligned, the second magnets 5 generate a magnetic attraction with the first magnets 4 at the corresponding position in the groove 14, thereby stabilizing the adjustment plate 2 in that position. Similarly, when the adjustment plate 2 is moved to a position where the through hole 21 and the test hole 13 are offset, the second magnets 5 generate a corresponding magnetic force with the other set of first magnets 4, stabilizing the position. Utilizing the principle of magnetic interaction, the position of the adjustment plate 2 can be precisely controlled, ensuring that the through hole 21 and the test hole 13 are accurately aligned or offset. The adjustment plate 2 is prevented from rotating and causing an impact during the process of the limiting rod 31 being inserted into the slot 34 , so that the limiting rod 31 and the slot 34 cooperate to provide preliminary positioning for the adjustment plate 2 .

[0042] In some embodiments of the present application, a handle 22 is provided on the side of the adjustment plate 2 facing away from the main body 1 of the vision card. The adjustment plate 2 can be rotated using the handle 22. Specifically, by rotating the adjustment plate 2 using the handle 22, the user can more precisely control the alignment of the through-hole 21 with the test hole 13, thereby ensuring the accuracy of the inspection results. The handle 22 provides a stable grip, helping to reduce misoperation caused by slipping or unstable hands.

[0043] In some embodiments of the present application, the cross-section of the handle portion 12 is elliptical. Specifically, the elliptical cross-section of the handle design better conforms to the natural gripping curvature of the human hand. When grasping the elliptical handle, the palm and fingers can more naturally conform to the handle surface, reducing hand muscle tension and discomfort.

[0044] In some embodiments of the present application, the handle portion 12 is detachably connected to the shielding portion 11. When not in use, the user can separate the handle portion 12 and the shielding portion 11 and store them separately to reduce space occupied and facilitate transportation. Through the detachable connection, the user can easily remove the shielding portion 11 for cleaning and maintenance, keeping the product neat and hygienic. In some cases, the handle portion 12 or the shielding portion 11 may need to be replaced due to wear or damage. The detachable connection design allows the user to replace damaged parts separately without having to scrap the entire handle, thereby extending the service life of the product and reducing the cost of use.

[0045] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A vision card, characterized in that: include: The main body of the vision card has a test hole for vision testing; An adjustment plate is movably provided on the vision card body, the adjustment plate is provided with a through hole that matches the shape of the test hole, and the position of the through hole can be adjusted by controlling the movement of the adjustment plate so that the through hole overlaps with the test hole and is connected, or is offset from the test hole to block it; The vision sign body includes a shielding portion and a handle portion connected to the middle position of one side of the shielding portion, and the adjustment plate is close to the handle portion; One side of the vision sign body is at least partially recessed to form a groove, and the adjustment plate is located in the groove; A first magnet is provided on both opposite sides of the groove, and a second magnet with opposite magnetic properties to the first magnet is provided on the side of the adjustment plate facing the bottom of the groove. The second magnet cooperates with the first magnets on both sides to position the adjustment plate in a state where the through hole and the test hole overlap and in a state where the through hole and the test hole are staggered.

2. A vision card according to claim 1, characterized in that: The adjustment plate is rotatably connected to the vision sign body.

3. A vision card according to claim 1, characterized in that: It also includes a limit assembly arranged between the adjustment plate and the handle, and the limit assembly cooperates with the adjustment plate to limit the adjustment plate in a state where the through hole and the test hole overlap and in a state where the through hole and the test hole are staggered; the handle part is provided with a sliding groove for the limit rod to slide, and the inner wall of the sliding groove is provided with a movable hole connected to the outside, and the limit rod has a transmission part, and the transmission part protrudes outward through the movable hole.

4. A vision card according to claim 3, characterized in that: The limiting assembly includes a limiting rod, an elastic member and at least two groups of limiting members, the two groups of limiting members are respectively arranged on both sides of the adjustment plate, one group of limiting members includes at least two limiting blocks, a slot that can cooperate with the limiting rod is formed between the two limiting blocks, the limiting rod is arranged on the handle part, and can be slid along the length direction of the handle part to be inserted into the slot and removed from the slot, and the two ends of the elastic member are respectively connected to the limiting rod and the bottom of the slide groove.

5. The vision card according to claim 1, characterized in that: A handle is provided on the side of the adjustment plate facing away from the vision sign body, and the adjustment plate can be rotated by the handle.

6. A vision card according to claim 1, characterized in that: The cross section of at least a portion of the handle portion is oval.

7. The vision card according to claim 1, characterized in that: The handle portion and the shielding portion are detachably connected.

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