Visual chart with anti-recitation function

Abstract

The utility model discloses a visual chart with an anti-recitation function, which comprises an upper supporting cover, a lower base is arranged below the upper supporting cover, a supporting channel shell is fixedly arranged between the upper supporting cover and the lower base, an LED lamp is inserted in the supporting channel shell, a visual chart rotating column structure is arranged on the supporting channel shell, and the visual chart rotating column structure is connected with the lower base. A covering plate is arranged on the outer side of the visual chart rotating column structure and located between the upper supporting cover and the lower base, and visual chart detection fonts are attached to the visual chart rotating column structure. Detection patterns can be changed randomly through the visual chart rotating column structure and the covering plate, so that during vision testing, the sequence and rules cannot be remembered through recitation, and vision detection is effectively prevented from being avoided through recitation.

Description

Technical Field

[0001] The utility model relates to the technical field of vision charts, in particular to a vision chart with an anti-recitation function. Background Art

[0002] An eye chart is a chart used to measure vision. Existing eye charts are attached to lamps. Because the eye chart occupies a large area and is fixed in position on the lamp, during some vision tests, it is easy for people to memorize the chart and remember the corresponding positions and pattern changes to avoid vision testing, resulting in an inability to accurately diagnose vision conditions. Utility Model Content

[0003] The purpose of the utility model is to provide an eye chart with an anti-recitation function to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an eye chart with an anti-recitation function, comprising an upper support cover, a lower base is provided below the upper support cover, a support channel shell is fixedly provided between the upper support cover and the lower base, an LED lamp is plugged into the interior of the support channel shell, an eye chart rotating column structure is provided on the support channel shell, a cover plate is provided on the outside of the eye chart rotating column structure, located between the upper support cover and the lower base, and an eye chart detection font is attached to the eye chart rotating column structure.

[0005] Preferably, the eye chart rotating column structure includes a rotating unit column, and the upper and lower surfaces of the rotating unit column are provided with sliding grooves. Several sliding blocks are slidingly connected inside the sliding grooves, and the rotating unit columns are slidingly connected to each other. Multiple rotating unit columns form a rotating column, and the eye chart rotating column structure is made of transparent material.

[0006] Preferably, the supporting channel shell is provided with a light source channel, the front side of the covering plate is provided with an observation port, and the back side of the covering plate is provided with a rotation opening.

[0007] Preferably, a sliding groove is provided on the lower surface of the upper support cover and the upper surface of the lower base.

[0008] Preferably, the LED lamp is an LED lamp with adjustable brightness, and a charging port, a power switch and a rotary knob are provided above the LED lamp.

[0009] Compared with the prior art, the beneficial effect of the present invention is that the detection pattern can be randomly changed by rotating the column structure and the cover plate of the vision chart, so that when conducting a vision test, it is impossible to remember the order and rules by reciting, which effectively prevents reciting to evade vision testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the support channel housing structure of the utility model;

[0012] Figure 3 This is a schematic diagram of the back structure of the cover plate of the present invention;

[0013] Figure 4 This is a schematic diagram of the structure of the rotating column of the eye chart of the present utility model.

[0014] In the figure: 1. Upper support cover; 2. Lower base; 3. Support channel shell; 4. LED light; 5. Eye chart rotating column structure; 51. Rotating unit column; 52. Slide groove; 53. Sliding block; 6. Cover plate. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Please refer to 1-4. An embodiment of the present invention provides: an eye chart with an anti-recitation function, comprising an upper support cover 1, a lower base 2 is provided below the upper support cover 1, a support channel shell 3 is fixedly provided between the upper support cover 1 and the lower base 2, the support channel shell 3 is used to support the upper support cover 1 and the lower base 2, an LED lamp 4 is plugged into the support channel shell 3, an eye chart rotating column structure 5 is provided on the support channel shell 3, an eye chart rotating column structure 5 is provided on the outside of the eye chart rotating column structure 5, a cover plate 6 is provided between the upper support cover 1 and the lower base 2, an eye chart detection font is attached to the eye chart rotating column structure 5, the cover plate 6 can effectively cover the detection pattern on the eye chart rotating column structure 5, and the next detection pattern cannot be remembered without rotating the eye chart rotating column structure 5.

[0017] The rotating column structure 5 of the eye chart includes a rotating unit column 51. The upper and lower surfaces of the rotating unit column 51 are provided with a slide groove 52. Several sliding blocks 53 are slidably connected inside the slide groove 52. The rotating unit columns 51 are slidably connected to each other. Multiple rotating unit columns 51 form a rotating column. The rotating column structure 5 of the eye chart is made of transparent material. Each rotating unit column 51 is provided with several detection patterns. Each rotating unit column 51 is a detection pattern of a degree, but the opening shape of the detection pattern is different. The use of transparent material can project the light source of the LED onto the pattern, thereby improving the brightness of the pattern and facilitating detection.

[0018] The support channel shell 3 is provided with a light source channel, the cover plate 6 is provided with an observation opening on the front surface, and the cover plate 6 is provided with a rotating opening on the back surface. The light source channel ensures that the light source is not blocked, the observation opening can concentrate the light source on the observation opening position, and the brightness is improved. The rotating unit column 51 is rotated from the back, and the rotating direction cannot be seen by the front detection personnel.

[0019] The upper surface of the upper support cover 1 and the upper surface of the lower base 2 are provided with sliding grooves 52, which facilitate the rotation of the visual acuity table rotating column structure 5 and improve the rotation effect.

[0020] The LED lamp 4 is an adjustable brightness LED lamp, and the LED lamp 4 is provided with a charging port, a power switch and a rotary knob above. The brightness of the LED lamp 4 can be adjusted by the rotary knob above, and the luminosity is adjusted.

[0021] Working principle: when in use, the detector is located in front of the cover plate 6, the LED lamp 4 is started through the power switch, the light passes through the rotating unit column 51, and is projected onto the pattern. The area in front of the cover plate 6 is brightened, the detection pattern is changed by rotating the rotating unit column 51, the detector cannot judge whether the rotating unit column 51 is rotating forward or backward, and the pattern appears, so it cannot be recited.

Claims

1. A vision chart with an anti-recitation function, comprising an upper support cover (1), characterized in that: A lower base (2) is provided below the upper support cover (1), a support channel shell (3) is fixedly provided between the upper support cover (1) and the lower base (2), an LED lamp (4) is plugged into the interior of the support channel shell (3), an eye chart rotating column structure (5) is provided on the support channel shell (3), a cover plate (6) is provided outside the eye chart rotating column structure (5) and between the upper support cover (1) and the lower base (2), and an eye chart detection font is attached to the eye chart rotating column structure (5).

2. The eye chart with anti-recitation function according to claim 1, characterized in that: The eye chart rotating column structure (5) comprises a rotating unit column (51), wherein the upper and lower surfaces of the rotating unit column (51) are both provided with a slide groove (52), wherein a plurality of sliding blocks (53) are slidably connected inside the slide groove (52), and the rotating unit columns (51) are slidably connected to each other, wherein a plurality of rotating unit columns (51) form a rotating column, and the eye chart rotating column structure (5) is made of a transparent material.

3. The eye chart with anti-recitation function according to claim 1, characterized in that: The supporting channel housing (3) is provided with a light source channel, the front surface of the covering plate (6) is provided with an observation port, and the back surface of the covering plate (6) is provided with a rotation opening.

4. The eye chart with anti-recitation function according to claim 1, characterized in that: A sliding groove (52) is provided on the lower surface of the upper support cover (1) and the upper surface of the lower base (2).

5. The eye chart with anti-recitation function according to claim 1, characterized in that: The LED lamp (4) is an LED lamp with adjustable brightness, and a charging port, a power switch and a rotary knob are provided above the LED lamp (4).

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