Visual chart for visual training

Abstract

The utility model discloses a visual chart for visual training, relates to the technical field of visual charts, and solves the problems that a visual chart in the prior art is inconvenient to carry and easy to damage when people go out. The visual chart comprises a box body and a visual chart board, the box body comprises an upper frame, a lower frame and a rotating shaft, lamp panels are arranged in the upper frame and the lower frame, first side plates extend from two sides below the upper frame, second side plates extend from two sides above the lower frame, and the first side plates and the second side plates are arranged at intervals. The rotating shaft sequentially penetrates through the first side plate and the second side plate and is rotationally connected with the first side plate and the second side plate, the lower portion of the lower frame and the upper portion of the upper frame can be embedded, the visual chart board comprises an upper surface board and a lower surface board, and the upper surface board and the lower surface board are detachably installed on the upper frame and the lower frame respectively. The portable visual chart can be folded for storage, is convenient to carry, effectively protects the visual chart, prevents the visual chart from being damaged and generating creases, and ensures the effects of vision detection and vision training.

Description

Technical Field

[0001] The utility model belongs to the technical field of vision charts, and in particular relates to a vision chart for vision training. Background Art

[0002] In existing medical treatment, the eye chart is a chart used to measure vision. The eye charts used in China include: the international standard eye chart, the logarithmic eye chart, and the Langerhans circle eye chart. Functionally, they are divided into near vision charts and far vision charts. The eye chart is formulated based on the principle of visual angle. When testing vision, the eye chart is one of the existing basic tools.

[0003] Eye charts are often used in schools, hospitals, optician centers and other places. They can not only be used to test vision, but also for vision training to relax the ciliary muscles of the eyes and relieve eye fatigue from looking at close objects. They can also relieve accommodative myopia caused by ciliary muscle tension due to excessive close looking, and guide people to develop the habit of paying attention to looking into the distance and identifying small targets.

[0004] The eye chart has developed from the original paper type to the current light box type, and from the light tube type to the LED type to ensure sufficient brightness when testing vision. The physical examination centers of various medical institutions often have physical examination tasks outside, and vision testing is an indispensable item. However, the existing eye chart has a rigid structure and is too long. When carrying it outside, it is not only inconvenient to carry, but also easily damaged, increasing medical costs. In addition, the eye chart often has creases, which leads to poor vision test results and causes trouble for examiners.

[0005] Therefore, we propose a vision chart for vision training to solve the above technical problems. Utility Model Content

[0006] In order to solve the technical problems in the prior art that the eye chart is inconvenient to carry and easy to be damaged, the utility model provides an eye chart for vision training.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A vision chart for vision training comprises a box body and a vision chart board, the box body comprises an upper frame, a lower frame and a rotating shaft, light panels are provided in the upper frame and the lower frame, first side panels extend from both sides below the upper frame, second side panels extend from both sides above the lower frame, the first side panels and the second side panels are arranged at intervals, the rotating shaft passes through the first side panel and the second side panel in sequence and is rotatably connected to the first side panel and the second side panel, the lower portion of the lower frame can be engaged with the upper portion of the upper frame, and the vision chart board comprises an upper panel and a lower panel, and the upper panel and the lower panel can be detachably mounted on the upper frame and the lower frame, respectively.

[0009] By adopting the above technical scheme, when the utility model is in use, the first side plate and the second side plate on the upper frame and the lower frame are arranged at intervals and are connected by rotation through a rotating shaft. By removing the upper panel and the lower panel and storing them, staggering the positions of the upper frame and the lower frame, and rotating the upper frame downward until the upper part of the upper frame and the lower part of the lower frame are embedded together, the eye chart is folded and stored together, so that it is convenient to carry and use outside, and meet the requirements of the medical examination center for outpatient physical examinations. The eye chart plate adopts a hard light-transmitting plate, which is not easy to be damaged and creased, and can be unfolded and installed according to the above reverse steps when in use, which is convenient to use. Compared with the eye chart of the prior art, the utility model effectively reduces the length of the eye chart by staggering the upper frame and the lower frame for folding and storing. In addition to being convenient for inspectors to carry when going out to test their vision, for families who attach importance to the health of children's vision, it can be carried at home and convenient for children to train their vision, and guide them to develop the habit of paying attention to looking far away and identifying small targets, which greatly improves the scope of use of the eye chart.

[0010] In a further technical solution, a return spring is provided between the first side plate and the second side plate, two ends of the return spring are respectively fixedly connected to the first side plate and the second side plate, and the return spring is sleeved on the rotating shaft.

[0011] By adopting the above technical solution, a reset spring is arranged between the first side plate and the second side plate, so that the upper frame and the lower frame are elastically connected. When unfolded, they can be reset under the action of elastic potential energy, which is convenient to use.

[0012] In a further technical solution, the rotating shaft includes a screw rod and a first nut. The screw rod passes through the first side plate and the second side plate in sequence and is threadedly connected to the first nut at the threaded end.

[0013] By adopting the above technical solution, the upper frame and the lower frame can be disassembled through the cooperation of the screw rod and the first nut, so as to facilitate use.

[0014] In a further technical solution, a second nut is threadedly connected to the screw, and the two second side plates are provided with limiting grooves on one side close to the screw head end, and the shape of the screw head end and the shape of the second nut match the shape of the limiting groove.

[0015] By adopting the above technical solution, the screw head and the second nut enter the limiting groove, which can not only limit the rotation of the screw but also limit the sliding of the screw, thereby effectively ensuring the stable rotation of the upper frame and the lower frame.

[0016] In a further technical solution, first slots for inserting the upper panel are provided on both sides of the upper frame, and second slots for inserting the lower panel are provided on both sides of the lower frame.

[0017] By adopting the above technical solution, the upper table plate and the lower table plate are respectively inserted into the upper frame and the lower frame through the first slot and the second slot, which is convenient for installation and disassembly. Different upper table plates and lower table plates can be replaced to combine into different eye charts. It has an anti-back function, which avoids the testee from memorizing the visual marks in the eye chart in advance, and vision testing and vision training are more scientific and accurate.

[0018] In a further technical solution, a third slot is provided on both sides of the upper frame, and a fourth slot is provided on both sides of the lower frame. After the upper frame and the lower frame are folded and stored, the position of the first slot corresponds to the position of the fourth slot, and the position of the second slot corresponds to the position of the third slot.

[0019] By adopting the above technical solution, through the setting of the third slot and the fourth slot, after the upper frame and the lower frame are folded and stored, the position of the first slot corresponds to the position of the fourth slot, and the position of the second slot corresponds to the position of the third slot. The removed upper and lower panels are reinserted into the slots, thereby effectively protecting the eye chart, avoiding damage to the eye chart, and ensuring the effect of vision testing and vision training.

[0020] In a further technical solution, it also includes an intermediate plate, which is provided with fixing rods on all four sides, and the upper frame and the lower frame are provided with holes above the first slot and the second slot respectively, and the upper panel and the lower panel are provided with sockets corresponding to the holes, and the positions of the holes and the sockets correspond to the positions of the fixing rods and the clearances are matched.

[0021] By adopting the above technical solution, by inserting the fixing rods on the middle plate into the holes and the sockets in turn, not only can the gap between the upper plate and the lower plate be covered to prevent the upper frame and the lower frame from rotating, but the upper plate and the lower plate can also be fixed to the upper frame and the lower frame respectively, which is convenient for use.

[0022] In a further technical solution, a fitting cavity is provided below the lower frame, a side wall of the fitting cavity is open, and a shape of the upper portion of the upper frame matches the shape of the fitting cavity.

[0023] By adopting the above technical solution, the upper part of the upper frame is installed in the fitting cavity below the lower frame, so that it is convenient to store.

[0024] In a further technical solution, the lower frame is provided with a receiving groove for placing the sight mark indicator rod on the edge below the fitting cavity.

[0025] By adopting the above technical solution, the storage groove is provided to facilitate the storage of the sight mark indicator stick and facilitate use.

[0026] In a further technical solution, a plurality of rows of sight mark combinations are provided on the vision chart board, each row of the sight mark combinations includes transition sight marks and ordinary sight marks, the number of transition sight marks in each row of the sight mark combinations is not greater than the number of ordinary sight marks, and the transition sight marks are the same size as the ordinary sight marks in the previous row of sight mark combinations.

[0027] By adopting the above technical solution, through the design of transition sight marks and ordinary sight marks, when identifying from top to bottom, it is possible to determine whether the person being tested is guessing the answer, thereby reducing errors and making vision testing and vision training more scientific and accurate.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0029] 1. The utility model effectively reduces the length of the eye chart by staggering the upper frame and the lower frame for folding and storage. In addition to being convenient for inspectors to carry when going out to test their eyesight, families who value the eyesight health of their children can carry the chart out of the home to facilitate vision training for children, and guide them to develop the habit of paying attention to looking into the distance and identifying small targets, which greatly increases the scope of use of the eye chart.

[0030] 2. The utility model not only facilitates the installation and disassembly of the upper table plate and the lower table plate through the setting and coordination of the first slot, the second slot, the third slot and the fourth slot, but also can reinsert the removed upper table plate and the lower table plate into the slot when folded for storage, thereby effectively protecting the eye chart, avoiding damage to the eye chart and creases, and ensuring the effect of vision testing and vision training.

[0031] 3. The utility model, through the design of the transition sight mark and the ordinary sight mark, can judge whether the subject is guessing when identifying from top to bottom, reduce errors, and make vision testing and vision training more scientific and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0033] Figure 1 It is a schematic diagram of the structure of the utility model;

[0034] Figure 2 It is a structural schematic diagram of the folding and storage process of the utility model;

[0035] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0036] Figure 4 This is a schematic diagram of the structure of the utility model after folding and storage;

[0037] Figure 5It is a structural schematic diagram of the upper frame of the utility model;

[0038] Figure 6 It is a structural schematic diagram of the lower frame of the utility model;

[0039] Figure 7 It is a structural schematic diagram of the middle plate of the utility model.

[0040] Figure markings: 1-upper frame, 2-lower frame, 3-light board, 4-first side panel, 5-second side panel, 6-upper panel, 7-lower panel, 8-reset spring, 9-screw, 10-first nut, 11-second nut, 12-limiting groove, 13-first slot, 14-second slot, 15-third slot, 16-fourth slot, 17-middle plate, 18-fixing rod, 19-mating cavity, 20-storage slot, 21-hole, 22-jack. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] Embodiment 1:

[0043] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment provides a vision chart for vision training, including a box and a vision chart board, wherein the box includes an upper frame 1, a lower frame 2 and a rotating shaft, Figure 5 and Figure 6 A light panel 3 is provided in the upper frame 1 and the lower frame 2. A first side panel 4 extends from both sides below the upper frame 1. A second side panel 5 extends from both sides above the lower frame 2. The first side panel 4 and the second side panel 5 are arranged at intervals. The rotating shaft passes through the first side panel 4 and the second side panel 5 in sequence and is rotatably connected to the first side panel 4 and the second side panel 5. The lower part of the lower frame 2 can be embedded with the upper part of the upper frame 1. The vision chart includes an upper table panel 6 and a lower table panel 7, and the upper table panel 6 and the lower table panel 7 can be detachably installed on the upper frame 1 and the lower frame 2, respectively.

[0044] Specifically, by staggering the upper frame 1 and the lower frame 2 for folding and storage, the length of the eye chart is effectively reduced. In addition to being convenient for examiners to carry when going out to test their eyesight, families who value the vision health of their children can carry it at home to facilitate vision training for children, and guide them to develop the habit of paying attention to looking into the distance and identifying small targets, which greatly increases the scope of use of the eye chart.

[0045] In this embodiment, see Figure 1 , Figure 2 and Figure 3 The rotating shaft includes a screw rod 9 and a first nut 10. The screw rod 9 sequentially passes through the first side plate 4 and the second side plate 5 and is threadedly connected with the first nut 10 at the threaded end. A return spring 8 is provided between the first side plate 4 and the second side plate 5. The two ends of the return spring 8 are respectively fixedly connected with the first side plate 4 and the second side plate 5. The return spring 8 is sleeved on the rotating shaft. The screw rod 9 is also threadedly connected with a second nut 11. Figure 6 The two second side plates 5 are provided with a limiting groove 12 on one side close to the head end of the screw rod 9 , and the shape of the head end of the screw rod 9 and the shape of the second nut 11 match the shape of the limiting groove 12 .

[0046] Specifically, through the cooperation of the screw 9, the first nut 10 and the second nut 11, the installation and disassembly of the upper frame 1 and the lower frame 2 can be facilitated, and the head end of the screw 9 and the second nut 11 match the shape of the limiting groove 12. The head end of the screw 9 and the second nut 11 enter the limiting groove 12, which can not only limit the rotation of the screw 9, but also limit the sliding of the screw 9, thereby effectively ensuring the stable rotation of the upper frame 1 and the lower frame 2.

[0047] In this embodiment, see Figure 1 , Figure 3 , Figure 5 and Figure 6 Both sides of the upper frame 1 are provided with first slots 13 for inserting the upper panel 6 , and both sides of the lower frame 2 are provided with second slots 14 for inserting the lower panel 7 .

[0048] Specifically, the upper table plate 6 and the lower table plate 7 are respectively inserted into the upper frame 1 and the lower frame 2 through the first slot 13 and the second slot 14, which is convenient for installation and disassembly. Different upper table plates 6 and lower table plates 7 can be replaced to combine into different eye charts. It has an anti-back function to avoid the testee from memorizing the visual marks in the eye chart in advance, and vision testing and vision training are more scientific and accurate.

[0049] In this embodiment, see Figure 1 and Figure 7, and also includes an intermediate plate 17, wherein fixing rods 18 are arranged on all four sides of the intermediate plate 17, wherein the upper frame 1 and the lower frame 2 are respectively provided with holes 21 above the first slot 13 and the second slot 14, and the upper surface plate 6 and the lower surface plate 7 are respectively provided with plug holes 22 corresponding to the holes 21, and the positions of the holes 21 and the plug holes 22 correspond to the positions of the fixing rods 18 and the clearances are matched.

[0050] Specifically, by inserting the fixing rod 18 on the middle plate 17 into the hole 21 and the socket 22 in sequence, not only can the gap between the upper plate 6 and the lower plate 7 be covered to prevent the upper frame 1 and the lower frame 2 from rotating, but the upper plate 6 and the lower plate 7 can also be fixed to the upper frame 1 and the lower frame 2 respectively, which is convenient for use.

[0051] In this embodiment, a fitting cavity 19 is provided below the lower frame 2 , the side wall of the fitting cavity 19 is open, and the shape of the upper portion of the upper frame 1 matches the shape of the fitting cavity 19 .

[0052] Specifically, the upper part of the upper frame 1 is installed in the fitting cavity 19 at the lower part of the lower frame 2, so as to facilitate storage.

[0053] In this embodiment, see Figure 1 , Figure 2 and Figure 6 The lower frame 2 is provided with a receiving groove 20 for placing the sight mark indicator rod on the side below the fitting cavity 19.

[0054] Specifically, by providing the storage slot 20, the sight mark indicator stick can be stored conveniently and used conveniently.

[0055] In another embodiment, another way of engaging the upper frame 1 and the lower frame 2 is provided. Specifically, a first plug interface and a second plug interface are respectively provided above the upper frame 1 and below the lower frame 2. The first plug interface and the second plug interface cooperate with each other and are staggered so that the upper frame 1 and the lower frame 2 can be engaged with each other.

[0056] Embodiment 2:

[0057] This embodiment is obtained by further optimizing the embodiment 1. Figure 1 , Figure 3 , Figure 5 and Figure 6 A third slot 15 is provided on both sides of the upper frame 1, and a fourth slot 16 is provided on both sides of the lower frame 2. After the upper frame 1 and the lower frame 2 are folded and stored, the position of the first slot 13 corresponds to the position of the fourth slot 16, and the position of the second slot 14 corresponds to the position of the third slot 15.

[0058] Specifically, through the setting of the third slot 15 and the fourth slot 16, after the upper frame 1 and the lower frame 2 are folded and stored, the position of the first slot 13 corresponds to the position of the fourth slot 16, and the position of the second slot 14 corresponds to the position of the third slot 15. The removed upper table plate 6 and lower table plate 7 are reinserted into the slots, thereby effectively protecting the eye chart, avoiding damage to the eye chart, and ensuring the effect of vision testing and vision training.

[0059] Embodiment 3:

[0060] This embodiment is obtained by further optimizing on the basis of Embodiment 1 or Embodiment 2. In this embodiment, fourteen rows of sight mark combinations are provided on the vision chart board, each row of the sight mark combinations includes transition sight marks and ordinary sight marks, the number of transition sight marks in each row of the sight mark combinations is not greater than the number of ordinary sight marks, and in this embodiment, the number of transition sight marks is one, and the transition sight mark is the same size as the ordinary sight mark in the previous row of sight mark combinations.

[0061] Specifically, through the design of transition sight marks and ordinary sight marks, when identifying from top to bottom, it is possible to determine whether the subject is guessing the answer, thereby reducing errors and making vision testing and vision training more scientific and accurate.

[0062] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vision chart for vision training, characterized in that: The invention comprises a box body and a vision chart board, wherein the box body comprises an upper frame (1), a lower frame (2) and a rotating shaft, wherein a light board (3) is arranged inside the upper frame (1) and the lower frame (2), wherein first side panels (4) extend from both sides below the upper frame (1), and second side panels (5) extend from both sides above the lower frame (2), wherein the first side panels (4) and the second side panels (5) are arranged at intervals, wherein the rotating shaft passes through the first side panels (4) and the second side panels (5) in sequence and is rotatably connected to the first side panels (4) and the second side panels (5), wherein the lower part of the lower frame (2) can be engaged with the upper part of the upper frame (1), and wherein the vision chart board comprises an upper panel (6) and a lower panel (7), wherein the upper panel (6) and the lower panel (7) can be detachably mounted on the upper frame (1) and the lower frame (2), respectively.

2. A vision chart for vision training according to claim 1, characterized in that: A return spring (8) is provided between the first side plate (4) and the second side plate (5), and two ends of the return spring (8) are respectively fixedly connected to the first side plate (4) and the second side plate (5), and the return spring (8) is sleeved on the rotating shaft.

3. A vision chart for vision training according to claim 2, characterized in that: The rotating shaft comprises a screw rod (9) and a first nut (10); the screw rod (9) passes through the first side plate (4) and the second side plate (5) in sequence and is threadedly connected to the first nut (10) at the threaded end.

4. A vision chart for vision training according to claim 3, characterized in that: The screw rod (9) is also threadedly connected to a second nut (11), and the two second side plates (5) are provided with a limiting groove (12) on one side close to the head end of the screw rod (9), and the shape of the head end of the screw rod (9) and the shape of the second nut (11) both match the shape of the limiting groove (12).

5. A vision chart for vision training according to any one of claims 1 to 4, characterized in that: Both sides of the upper frame (1) are provided with first slots (13) for inserting the upper panel (6), and both sides of the lower frame (2) are provided with second slots (14) for inserting the lower panel (7).

6. A vision chart for vision training according to claim 5, characterized in that: A third slot (15) is also provided on both sides of the upper frame (1), and a fourth slot (16) is also provided on both sides of the lower frame (2); after the upper frame (1) and the lower frame (2) are folded and stored, the position of the first slot (13) corresponds to the position of the fourth slot (16), and the position of the second slot (14) corresponds to the position of the third slot (15).

7. A vision chart for vision training according to claim 6, characterized in that: The invention also comprises an intermediate plate (17), wherein fixing rods (18) are arranged around the intermediate plate (17), holes (21) are arranged on the upper frame (1) and the lower frame (2) above the first slot (13) and the second slot (14), respectively, and plug holes (22) corresponding to the holes (21) are arranged on the upper surface plate (6) and the lower surface plate (7), and the positions of the holes (21) and the plug holes (22) correspond to the positions of the fixing rods (18) and are clearance-matched.

8. The vision chart for vision training according to claim 1, characterized in that: A fitting cavity (19) is provided below the lower frame (2), the side wall of the fitting cavity (19) is open, and the shape of the upper portion of the upper frame (1) matches the shape of the fitting cavity (19).

9. The visual acuity chart for vision training according to claim 1, characterized in that: The lower frame (2) is provided with a receiving groove (20) for accommodating a sight mark indicator rod on the side below the fitting cavity (19).

10. The vision chart for vision training according to claim 1, characterized in that: The vision chart board is provided with multiple rows of sight mark combinations, each row of the sight mark combinations includes transition sight marks and ordinary sight marks, the number of transition sight marks in each row of the sight mark combinations is not greater than the number of ordinary sight marks, and the transition sight marks are the same size as the ordinary sight marks in the previous row of sight mark combinations.

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