Vision testing auxiliary device

Abstract

The utility model discloses a vision testing auxiliary device, which belongs to the technical field of ophthalmology vision testing and comprises a base and a vertical adjusting mechanism, the vertical adjusting mechanism comprises a first shell, a first driving mechanism and a first connecting plate, the first driving mechanism is positioned in the first shell, and the first connecting plate is positioned outside the first shell; the first shell is connected to the base, the first driving mechanism comprises a vertically-arranged first lead screw and a first sliding table connected with the first lead screw, the first sliding table is connected with the first connecting plate, and the first connecting plate is used for being connected with a visual chart. The visual chart is connected to the vertical adjusting mechanism, the first driving mechanism can be used for driving the visual chart to move up and down, then the height of the visual chart can be adjusted according to the height of a student, and the accuracy of vision detection results of children and adolescents of different school ages is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ophthalmic vision detection, in particular to a vision detection auxiliary device. Background Art

[0002] Vision is a comprehensive expression of eye health. In addition to the impact of academic burden, the increased use of electronic products is one of the main reasons for the increasing incidence of myopia among children and adolescents. In order to meet the needs of protecting children and adolescents' eyes, school physical examinations are a quick way to screen children and adolescents' eye health and vision, and a vision chart is needed in the process of school physical examinations to screen vision.

[0003] Currently, most vision charts are fixed on the wall or placed on the table, and then students stand at specified positions to measure students' vision in a designated manner.

[0004] However, during the physical examination upon entering school, the heights of children and adolescents of different school ages are different, and the angles at which students look at the eye chart are also different. In particular, the height difference between first grade and ninth grade students is very large. The use of fixed auxiliary testing devices will lead to errors in the test results, as different viewing angles will result in different visual observation results.

[0005] Therefore, if the height of the eye chart can be adjusted according to the student's height, the accuracy of vision test results for children and adolescents will be improved. Utility Model Content

[0006] The purpose of the utility model is to provide a vision detection auxiliary device to solve the problems existing in the above-mentioned prior art. By connecting the vision chart to the vertical adjustment mechanism, the vision chart can be driven to move up and down by the first driving mechanism, and the height of the vision chart can be adjusted according to the height of the students, thereby improving the accuracy of vision detection results of children and adolescents of different school ages.

[0007] To achieve the above purpose, the utility model provides the following solutions:

[0008] The utility model provides a vision detection auxiliary device, including a base and a vertical adjustment mechanism, the vertical adjustment mechanism including a first shell, a first driving mechanism located in the first shell and a first connecting plate located outside the first shell, the first shell is connected to the base, the first driving mechanism includes a vertically arranged first screw and a first slide connected to the first screw, the first slide is connected to the first connecting plate, and the first connecting plate is used to connect a vision chart.

[0009] Preferably, the first connecting plate includes a first body and a first L-shaped connecting portion connected to the first body, first guide grooves parallel to the first screw are opened on the left and right sides of the first shell, and the support arm of the first L-shaped connecting portion is slidably arranged in the first guide groove and connected to the first slide.

[0010] Preferably, it includes a first motor, which is located at the top end of the first housing, and the first motor is connected to the first screw through a first coupling.

[0011] Preferably, it includes a first optical bar and a first guide rail parallel to the first lead screw, the first optical bar is distributed on both sides of the first lead screw, the first slide is provided with a first through hole for the first optical bar to pass through, the first optical bar is slidably connected to the first slide, and the first slide is slidably connected to the first guide rail on one side thereof close to the first guide rail.

[0012] Preferably, a reinforcing rib is provided between the first shell and the base, and the reinforcing rib is located at a side away from the eye chart.

[0013] Preferably, it includes a lateral adjustment mechanism, which includes a second shell, a second driving mechanism located in the second shell, and a second connecting plate located outside the second shell, the second shell is connected to the first connecting plate, the second driving mechanism includes a transversely arranged second lead screw and a second slide connected to the second lead screw, the second slide is connected to the second connecting plate, and the second connecting plate is connected to the eye chart.

[0014] Preferably, the second connecting plate includes a second body and a second L-shaped connecting portion connected to the second body, and second guide grooves parallel to the second screw are provided on the upper and lower sides of the second shell, and the support arm of the second L-shaped connecting portion is slidably arranged in the second guide groove and connected to the second slide.

[0015] Preferably, a second motor is included, the second motor is located at one side of the second housing, and the second motor is connected to the second lead screw via a second coupling.

[0016] Preferably, it includes a second optical rod and a second guide rail parallel to the second lead screw, the second optical rod is distributed on both sides of the second lead screw, the second slide is provided with a second through hole for the second optical rod to pass through, the second optical rod is slidably connected to the second slide, and the second slide is slidably connected to the second guide rail on one side thereof close to the second guide rail.

[0017] Preferably, the base comprises a bottom plate and universal wheels installed below the bottom plate, and the universal wheels are distributed in a cross shape.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model connects the eye chart to a vertical adjustment mechanism, which includes a first driving mechanism. The first driving mechanism can drive the first slide to move up and down by rotating the first screw, and the first slide can drive the eye chart to move up and down, so that the height of the eye chart can be adjusted according to the height of the student, so that the height of the eye chart matches the height of the student, and the accuracy of the vision test results of children and adolescents of different school ages can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 Sectional view;

[0023] Figure 3 for Figure 2 The structure diagram at A is enlarged;

[0024] Figure 4 This is a schematic diagram of the first driving mechanism of the utility model;

[0025] Figure 5 This is a schematic diagram of the second driving mechanism of the utility model;

[0026] Among them, 1. base; 11. universal wheel; 12. bottom plate; 2. vertical adjustment mechanism; 21. reinforcing ribs; 22. first shell; 23. first driving mechanism; 231. first limit plate; 232. first slide; 233. first lead screw; 234. first optical rod; 235. first guide rail; 236. first motor; 24. first connecting plate; 3. horizontal adjustment mechanism; 31. second driving mechanism; 311. second limit plate; 312. second slide; 313. second lead screw; 314. second optical rod; 315. second guide rail; 316. second motor; 32. first fixed plate; 33. second shell; 34. second fixed plate; 35. second connecting plate; 4. eye chart. DETAILED DESCRIPTION

[0027] 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 in 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.

[0028] The purpose of the utility model is to provide a vision detection auxiliary device to solve the problems existing in the prior art. The vision chart is connected to the vertical adjustment mechanism, and the first driving mechanism can be used to drive the vision chart to move up and down, so that the height of the vision chart can be adjusted according to the height of the students, thereby improving the accuracy of vision detection results of children and adolescents of different school ages.

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figures 1 to 5 As shown, the utility model provides a vision detection auxiliary device, including a base 1 and a vertical adjustment mechanism 2, the base 1 is used to support the vertical adjustment mechanism 2, the base 1 can be placed directly on the ground, and can also be supported on the ground by rollers for easy movement. The vertical adjustment mechanism 2 includes a first shell 22, a first driving mechanism 23 located in the first shell 22, and a first connecting plate 24 located outside the first shell 22. The bottom end of the first shell 22 is connected to the base 1 to achieve the connection between the vertical adjustment mechanism 2 and the base 1. The first driving mechanism 23 includes a first lead screw 233 arranged vertically and a first slide 232 connected to the first lead screw 233. The first lead screw 233 is connected to a power structure, which can be manual or electric. The power structure drives the first lead screw 233 to rotate, which can be converted into a vertical linear movement of the first slide 232. The first slide 232 is connected to the first connecting plate 24, and the first connecting plate 24 is used to connect the eye chart 4, so that the eye chart 4 can be lifted and lowered when the first slide 232 moves vertically. The eye chart 4 can be in various forms such as cardboard type, light box type, etc., and can be connected and fixed by bonding, hanging, clamping, etc.

[0031] The utility model connects the eye chart 4 to the vertical adjustment mechanism 2, and the vertical adjustment mechanism 2 includes a first driving mechanism 23. The first driving mechanism 23 can drive the first slide 232 to move up and down by the rotation of the first screw 233. The first slide 232 can drive the eye chart 4 to move up and down, and then the height of the eye chart 4 can be adjusted according to the height of the student, so that the height of the eye chart 4 matches the height of the student, which can improve the accuracy of the vision test results of children and adolescents of different school ages.

[0032] A scale may be provided on the first shell 22 , and different scales may correspond to children and adolescents of different age groups. When the eye chart 4 is raised or lowered, the height of the eye chart 4 may be quickly adjusted according to the corresponding position of the scale.

[0033] The first connecting plate 24 includes a first body and a first L-shaped connecting portion connected to the first body, the first L-shaped connecting portion and the first body form an embracing structure, the left and right sides of the first shell 22 are provided with first guide grooves parallel to the first lead screw 233, the support arms of the first L-shaped connecting portion are slidably arranged in the first guide grooves, embracing and connecting the first shell 22 on the left and right sides, the support arms of the first L-shaped connecting portion are connected to the first slide 232 inside the first shell 22, and a first fixing plate 32 can be provided according to the spacing between the relative positions of the first connecting plate 24 and the first slide 232, and the first connecting plate 24 and the first slide 232 are connected by the first fixing plate 32.

[0034] The first motor 236 includes a first motor 236, which can be a stepper motor, and can better control the number of rotations. The first motor 236 is located at the top of the first housing 22, and the first motor 236 is connected to the first lead screw 233 through a first coupling. By controlling the first motor 236, the rotation of the first lead screw 233 can be controlled, thereby controlling the lifting height of the first slide 232.

[0035] The first guide rail 235 includes a first optical bar 234 and a first guide rail 235 which are parallel to the first lead screw 233. The ends of the first lead screw 233, the first optical bar 234 and the first guide rail 235 are connected to the same first limit plate 231. The first optical bars 234 are distributed on both sides of the first lead screw 233. The first optical bars 234 arranged on both sides can improve the stability of the operation of the first slide 232. The first slide 232 is provided with a first through hole for the first optical bar 234 to pass through. The first optical bar 234 and the first slide 232 are slidably connected through the first through hole. The first slide 232 is slidably connected to the first guide rail 235 on one side thereof close to the first guide rail 235. The first optical bar 234 and the first guide rail 235 jointly constrain the movement of the first slide 232, which can further improve its stability.

[0036] A reinforcing rib 21 is provided between the first shell 22 and the base 1 . The reinforcing rib 21 may be a triangular structure or a trapezoidal structure. The reinforcing rib 21 is located on a side of the first shell 22 away from the eye chart 4 , which can further improve the stability of the vertical adjustment mechanism 2 .

[0037] In addition to the vertical adjustment mechanism 2, the utility model can also be provided with a transverse adjustment mechanism 3, through which the transverse position of the visual acuity chart 4 can be adjusted, avoiding the need to move the entire device when transverse adjustment is required, which can improve the convenience of operation and further improve the accuracy of the test results. Specifically, the transverse adjustment mechanism 3 includes a second shell 33, a second drive mechanism 31 located in the second shell 33, and a second connecting plate 35 located outside the second shell 33. One side of the second shell 33 is connected to the first connecting plate 24 to achieve the connection between the transverse adjustment mechanism 3 and the vertical adjustment mechanism 2. When the vertical adjustment mechanism 2 is in operation, it can drive the transverse adjustment mechanism 3 to move up and down as a whole. The second driving mechanism 31 includes a second lead screw 313 arranged laterally and a second slide 312 connected to the second lead screw 313. The second lead screw 313 is connected to a power structure, which can be manual or electric. The power structure drives the second lead screw 313 to rotate, which can be converted into a lateral linear movement of the second slide 312. The second slide 312 is connected to the second connecting plate 35, and the second connecting plate 35 is connected to the eye chart 4, so that the eye chart 4 can be adjusted laterally when the second slide 312 moves laterally.

[0038] The second connecting plate 35 includes a second body and a second L-shaped connecting portion connected to the second body, the second L-shaped connecting portion and the second body form an embracing structure, the second shell 33 is provided with second guide grooves parallel to the second lead screw 313 on the upper and lower sides, the support arms of the second L-shaped connecting portion are slidably arranged in the second guide grooves, embracing and connecting the second shell 33 on the upper and lower sides, the support arms of the second L-shaped connecting portion are connected to the second slide 312 inside the second shell 33, and a second fixing plate 34 can be provided according to the spacing size of the relative positions of the second connecting plate 35 and the second slide 312, and the second fixing plate 34 is used to connect the second connecting plate 35 and the second slide 312.

[0039] It includes a second motor 316, which can be a stepper motor, and can better control the number of rotations. The second motor 316 is located on one side of the second shell 33, and the second motor 316 is connected to the second screw 313 through a second coupling. By controlling the second motor 316, the rotation of the second screw 313 can be controlled, and then the lateral position of the second slide 312 can be controlled.

[0040] The second guide rail 315 includes a second optical rod 314 and a second guide rail 315 which are parallel to the second lead screw 313. The ends of the second lead screw 313, the second optical rod 314 and the second guide rail 315 are connected to the same second limit plate 311. The second optical rods 314 are distributed on both sides of the second lead screw 313. The second optical rods 314 arranged on both sides can improve the stability of the operation of the second slide 312. The second slide 312 is provided with a second through hole for the second optical rod 314 to pass through. The second optical rod 314 and the second slide 312 are slidably connected through the second through hole. The second slide 312 is slidably connected to the second guide rail 315 on one side thereof close to the second guide rail 315. The second optical rod 314 and the second guide rail 315 jointly constrain the movement of the second slide 312, which can further improve its stability.

[0041] The base 1 may include a bottom plate 12 and universal wheels 11 installed under the bottom plate 12. The universal wheels 11 are distributed in a cross shape, which can provide stable support for the bottom plate 12 while being able to move the position conveniently. In addition, the universal wheels 11 may also be provided with a locking structure to enable the device to be placed at a specified position.

[0042] The working principle of the utility model is as follows:

[0043] When the staff conducts the physical examination upon entering the school, the vertical adjustment mechanism 2 is adjusted first, and the first motor 236 is controlled to rotate the first lead screw 233 to drive the first slide 232 to move up and down along the first guide rail 235 and the first optical bar 234. The eye chart 4 is pre-adjusted according to the average height of the grade being tested. The height of the eye chart 4 can be determined by the scale on the side of the first shell 22. After the height of the eye chart 4 is adjusted, the horizontal direction of the eye chart 4 is appropriately adjusted by the lateral adjustment mechanism 3 according to the standing position of the tested student. The adjustment method of the lateral adjustment mechanism 3 is consistent with the adjustment method of the vertical adjustment mechanism 2. After the height and horizontal directions are adjusted, the vision test is performed after the tested student's line of sight is kept consistent with the eye chart 4.

[0044] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A vision detection auxiliary device, comprising a base and a vertical adjustment mechanism, wherein the vertical adjustment mechanism comprises a first shell, a first driving mechanism located in the first shell, and a first connecting plate located outside the first shell, wherein the first shell is connected to the base, the first driving mechanism comprises a first vertically arranged lead screw and a first slide connected to the first lead screw, the first slide is connected to the first connecting plate, and the first connecting plate is used to connect a vision chart; characterized in that: The first connecting plate includes a first body and a first L-shaped connecting portion connected to the first body. First guide grooves parallel to the first lead screw are opened on the left and right sides of the first shell. The support arm of the first L-shaped connecting portion is slidably arranged in the first guide groove and connected to the first slide.

2. The vision detection auxiliary device according to claim 1, characterized in that: It includes a first motor, which is located at the top end of the first housing and is connected to the first lead screw via a first coupling.

3. The vision detection auxiliary device according to claim 2, characterized in that: It includes a first optical rod and a first guide rail parallel to the first lead screw, the first optical rod is distributed on both sides of the first lead screw, the first slide is provided with a first through hole for the first optical rod to pass through, the first optical rod is slidably connected to the first slide, and the first slide is slidably connected to the first guide rail on one side thereof close to the first guide rail.

4. The vision detection auxiliary device according to claim 1, characterized in that: A reinforcing rib is arranged between the first shell and the base, and the reinforcing rib is located at a side away from the eye chart.

5. The vision detection auxiliary device according to claim 1, characterized in that: It includes a lateral adjustment mechanism, which includes a second shell, a second driving mechanism located in the second shell, and a second connecting plate located outside the second shell, the second shell is connected to the first connecting plate, the second driving mechanism includes a transversely arranged second lead screw and a second slide connected to the second lead screw, the second slide is connected to the second connecting plate, and the second connecting plate is connected to the eye chart.

6. The vision detection auxiliary device according to claim 5, characterized in that: The second connecting plate includes a second body and a second L-shaped connecting portion connected to the second body. Second guide grooves parallel to the second lead screw are provided on the upper and lower sides of the second shell. The support arm of the second L-shaped connecting portion is slidably arranged in the second guide groove and connected to the second slide.

7. The vision detection auxiliary device according to claim 5, characterized in that: A second motor is included, wherein the second motor is located at one side of the second housing, and the second motor is connected to the second lead screw via a second coupling.

8. The vision detection auxiliary device according to claim 7, characterized in that: It includes a second optical rod and a second guide rail parallel to the second lead screw, the second optical rod is distributed on both sides of the second lead screw, the second slide is provided with a second through hole for the second optical rod to pass through, the second optical rod is slidably connected to the second slide, and the second slide is slidably connected to the second guide rail on one side thereof close to the second guide rail.

9. The vision detection auxiliary device according to claim 1, characterized in that: The base comprises a bottom plate and universal wheels installed below the bottom plate, and the universal wheels are distributed in a cross shape.

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