Recitation-preventing visual chart lamp box
By installing transparent boards and adjustment rods in the vision meter light box, a regulatable vision sheet is formed, solving the problem of single and insufficient anti -recitation ability in the existing technology, and realizing the flexible switching and efficient anti -recitation effect of the vision table. Essence
Patent Information
- Application Number
- CN202420608575.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing vision meter light box has a single form and cannot meet the needs of different detectors. It has poor ability to prevent reciting and lacks adaptability and operation convenience.
A kind of anti -recitation vision table light box is designed. By installing a transparent board inside the box, combining the adjustment rod connection tube and ring belt to form a regulatory vision table, it allows temporarily switching the vision table in the process of inspection to prevent recitation.
The flexible switching and combination of the vision sheet is achieved, which improves the effect and adaptability of the recitation, and at the same time enhances the convenience of operation and the effect of visual detection.
Smart Images
Figure CN222398288U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of eye charts, and more specifically to an anti-recitation eye chart light box. Background Art
[0002] At present, there are many vision charts for vision testing, and their test results are obviously different. These vision charts include the international standard vision chart, the standard logarithmic vision chart, the ETDRS logarithmic vision chart, the Lang's ring vision chart, the children's graphic vision chart, the single vision chart, the spatial frequency (grating) vision chart, etc. Different medical institutions often choose one of these vision charts. In order to prevent the testee from memorizing the vision chart, the same type of vision chart with multiple vision charts in different directions is used.
[0003] Authorization announcement number CN201414787 discloses an anti-recitation eye chart light box. The utility model relates to the field of eye vision testing and vision care technology. The purpose of the utility model is to solve the problem that the existing eye chart light box has a single eye chart format and cannot meet the needs of different testers. The technical solution is: a variety of different types of eye charts and eye charts of the same type with different arrangement directions of sight marks are concentrated in an eye chart light box in the form of a scroll, and the required eye chart is selected through an infrared remote control or button. The single-chip microcomputer receives the control command issued by the infrared remote control, and at the same time determines the eye chart position information sent back by the sensor, drives the AC motor to drag the eye chart to run, until the eye chart position information sent back by the sensor matches the information displayed on the digital tube, and then controls the AC motor to stop working.
[0004] In the above disclosed structure, an integral eye chart is used for replacement, which has poor anti-recitation capability, cannot be directly changed in position for switching during the detection process, has poor adaptability, and is not convenient for adjustment and operation, and needs to be improved. Utility Model Content
[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an anti-recitation eye chart light box. By installing a transparent plate inside the box and combining an adjustment rod to connect the adjustment tube and the annular belt, an adjustable eye chart can be formed. The adjustment position can be rotated to facilitate viewing, so as to display the alphabet in different directions. It can be temporarily switched during the inspection process to prevent recitation, facilitate combined use, and has high adaptability.
[0006] To solve the above problems, the utility model adopts the following technical solutions.
[0007] A light box for preventing recitation of eye charts, comprising a box body, an observation window being provided on one side of the box body, a transparent plate being fixedly connected to the inside of the observation window, adjustment rods being rotatably connected to the inner sides of the box body, an adjustment cylinder being sleeved and installed on the outer surface of the adjustment rod, a locking ring being threadedly connected to the surface of the adjustment rod, one side surface of the locking ring being pressed and connected to the end position of the adjustment cylinder, an annular belt being rotatably connected to the outer surface of the adjustment cylinder, an eye chart being printed on the surface of the annular belt, one side surface of the annular belt being attached to one side surface of the transparent plate, lamp posts being fixedly installed on the inner sides of the box body, the lamp posts being located on one side of the annular belt, one end surface of the adjustment rod being fixedly connected to a hand wheel, and the hand wheel being rotatably installed on the upper surface of the box body.
[0008] Furthermore, there are four adjusting rods, which are respectively connected to the four inner corners of the box.
[0009] Furthermore, the adjusting cylinder and the annular belt each have at least six layers, and are evenly spaced and distributed inside the box.
[0010] Furthermore, the lamp post is located on one side of the transparent plate and at both ends of the annular belt. By arranging multiple layers of annular belts, a gradually varying size vision chart can be formed, which is convenient for inspection.
[0011] Furthermore, adjustment blocks are slidably mounted on both ends of the box, and a right-angle rod is disposed on one side of the adjustment block.
[0012] Furthermore, one end of the right-angle rod is fixedly connected to an auxiliary rod, and the auxiliary rod is tightly connected to the two ends of the annular belt.
[0013] Furthermore, the interior of the adjustment block is slidably connected to a guide rod, one end of the guide rod is fixedly connected to the interior of the box, and the other end of the guide rod is sleeved with a tightening spring. The auxiliary rod and the guide rod are connected by the adjustment block, and can be slidably adjusted to perform auxiliary tightening, thereby ensuring that the annular belt fits the transparent plate, improving the viewing effect, and avoiding interference.
[0014] Compared with the prior art, the advantages of the present invention are:
[0015] (1) This solution can form an adjustable eye chart by installing a transparent plate inside the box and combining an adjustment rod to connect the adjustment tube and the ring belt. It is convenient to watch and can be rotated to adjust the position, so as to display the alphabet in different directions. It can be temporarily switched during the inspection process to prevent recitation, facilitate combined use, and has high adaptability.
[0016] (2) By providing multiple layers of annular bands, a visual acuity chart with gradually varying sizes can be formed, which is convenient for examination and use.
[0017] (3) The auxiliary rod and the guide rod are connected by an adjustment block, which can be slidably adjusted to assist in tightening, ensuring that the annular belt fits the transparent plate, improving the viewing effect and avoiding interference. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a partial schematic diagram of the utility model;
[0020] Figure 3 It is a partial structural diagram of the connection between the adjustment block and the guide rod of the utility model.
[0021] Description of the numbers in the figure:
[0022] 1 box body, 11 observation window, 12 transparent plate, 13 adjusting rod, 14 adjusting cylinder, 15 locking ring, 16 annular belt, 17 lamp post, 18 hand wheel, 2 adjusting block, 21 right angle rod, 22 auxiliary rod, 23 guide rod, 24 tightening spring. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.
[0024] Example 1
[0025] See also Figure 1 and Figure 2 A light box for preventing recitation of eye charts comprises a box body 1, an observation window 11 is provided on one side of the box body 1, a transparent plate 12 is fixedly connected inside the observation window 11, adjusting rods 13 are rotatably connected on both sides of the inside of the box body 1, an adjusting cylinder 14 is sleeved and installed on the outer surface of the adjusting rod 13, a locking ring 15 is threadedly connected on the surface of the adjusting rod 13, one side surface of the locking ring 15 is pressed and connected to the end position of the adjusting cylinder 14, an annular belt 16 is rotatably connected on the outer surface of the adjusting cylinder 14, an eye chart is printed on the surface of the annular belt 16, one side surface of the annular belt 16 is attached to one side surface of the transparent plate 12, lamp posts 17 are fixedly installed on both sides of the inside of the box body 1, the lamp posts 17 are located on one side of the annular belt 16, one end surface of the adjusting rod 13 is fixedly connected to a hand wheel 18, and the hand wheel 18 is rotatably installed on the upper surface of the box body 1.
[0026] There are four adjusting rods 13, and they are respectively connected to the four corners of the box body 1. The adjusting tube 14 and the annular belt 16 have at least six layers, and are evenly spaced inside the box body 1. The lamp post 17 is located on one side of the transparent plate 12 and at both ends of the annular belt 16. By setting up multiple layers of annular belts, a gradually changing eye chart can be formed, which is convenient for inspection and use. When in use, the direction of the letters on the annular belt 16 can be viewed through the transparent plate 12 to perform a vision test. At the same time, the hand wheel 18 can be manually rotated to rotate the adjusting rod 13 and the adjusting tube 14, and the annular belt 16 can also be rotated. The letters in different positions can be rotated to the position of the observation window 11, which is convenient for temporary changes during the detection process, effectively improving the anti-recitation effect, facilitating combined installation, and facilitating adjustment and use.
[0027] Example 2
[0028] See also Figure 1 and Figure 3 A light box for preventing recitation of eye charts comprises a box body 1, an observation window 11 is provided on one side of the box body 1, a transparent plate 12 is fixedly connected inside the observation window 11, adjusting rods 13 are rotatably connected on both sides of the inside of the box body 1, an adjusting cylinder 14 is sleeved and installed on the outer surface of the adjusting rod 13, a locking ring 15 is threadedly connected on the surface of the adjusting rod 13, one side surface of the locking ring 15 is pressed and connected to the end position of the adjusting cylinder 14, an annular belt 16 is rotatably connected on the outer surface of the adjusting cylinder 14, an eye chart is printed on the surface of the annular belt 16, one side surface of the annular belt 16 is attached to one side surface of the transparent plate 12, lamp posts 17 are fixedly installed on both sides of the inside of the box body 1, the lamp posts 17 are located on one side of the annular belt 16, one end surface of the adjusting rod 13 is fixedly connected to a hand wheel 18, and the hand wheel 18 is rotatably installed on the upper surface of the box body 1.
[0029] An adjusting block 2 is slidably installed at both ends of the box body 1, and a right-angle rod 21 is provided on one side of the adjusting block 2. An auxiliary rod 22 is fixedly connected to one end of the right-angle rod 21. The auxiliary rod 22 is tightly connected to the two ends of the annular belt 16. A guide rod 23 is slidably connected to the inside of the adjusting block 2. One end of the guide rod 23 is fixedly connected to the inside of the box body 1, and a tightening spring 24 is sleeved on the other end of the guide rod 23. The auxiliary rod and the guide rod are connected by the adjusting block, and sliding adjustment can be performed for auxiliary tightening to ensure that the annular belt fits the transparent plate, improve the viewing effect, and avoid interference. The tightening spring 24 is used to tighten the adjusting block 2 and slide on the guide rod 23, so that the auxiliary rod 22 can be pushed to press the two end heads of the annular belt 16, so that it is stably fitted to the surface of the transparent plate 12, ensuring the viewing effect, avoiding the feeling of the gap, and the tightening force will not be felt by manual rotation adjustment, which is convenient for combined use.
[0030] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.
Claims
1. An anti-recitation eye chart light box, comprising a box body (1), a viewing window (11) is provided on one side of the box body (1), a transparent plate (12) is fixedly connected to the inside of the viewing window (11), and the characteristics are: The inner sides of the box body (1) are rotatably connected with adjustment rods (13), the outer surface of the adjustment rod (13) is sleeved with an adjustment cylinder (14), the surface of the adjustment rod (13) is threadedly connected with a locking ring (15), one side surface of the locking ring (15) is pressed and connected to the end position of the adjustment cylinder (14), the outer surface of the adjustment cylinder (14) is rotatably connected with an annular belt (16), the surface of the annular belt (16) is printed with a vision chart, one side surface of the annular belt (16) is attached to one side surface of the transparent plate (12), the inner sides of the box body (1) are fixedly installed with lamp posts (17), the lamp posts (17) are located at one side of the annular belt (16), one end surface of the adjustment rod (13) is fixedly connected with a hand wheel (18), and the hand wheel (18) is rotatably installed on the upper surface of the box body (1).
2. The anti-recitation eye chart light box according to claim 1, characterized in that: There are four adjusting rods (13), which are respectively connected to the four inner corners of the box body (1).
3. The anti-recitation eye chart light box according to claim 1, characterized in that: The adjustment cylinder (14) and the annular belt (16) both have at least six layers and are evenly spaced and distributed inside the box body (1).
4. The anti-recitation eye chart light box according to claim 1, characterized in that: The lamp post (17) is located on one side of the transparent plate (12) and at both ends of the annular belt (16).
5. The anti-recitation eye chart light box according to claim 1, characterized in that: Adjustment blocks (2) are slidably mounted on both ends of the box body (1), and a right-angle rod (21) is provided on one side of the adjustment block (2).
6. The anti-recitation eye chart light box according to claim 5, characterized in that: One end of the right-angle rod (21) is fixedly connected to an auxiliary rod (22), and the auxiliary rod (22) is tightly connected to the two ends of the annular belt (16).
7. The anti-recitation eye chart light box according to claim 5, characterized in that: A guide rod (23) is slidably connected inside the adjustment block (2), one end of the guide rod (23) is fixedly connected to the inside of the box body (1), and the other end of the guide rod (23) is sleeved with a tensioning spring (24).