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Vision detecting device with replaceable visual charts

A vision detection and vision chart technology, which is applied in the fields of eye testing equipment, medical science, diagnosis, etc., can solve the problem that the light box cannot replace the vision chart, etc., and achieve the effect of increasing fairness

Inactive Publication Date: 2012-10-24
THE SECOND FOREIGN LANGUAGE SCHOOL AFFILIATED TO SHANGHAI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a vision testing device that can replace the vision chart. By setting the reel inside the light box, a plurality of different vision charts can be scrolled and displayed, which overcomes the deficiency that the traditional vision chart light box cannot replace the vision chart, thereby realizing Purpose of the invention

Method used

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  • Vision detecting device with replaceable visual charts
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Embodiment Construction

[0011] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0012] Such as figure 1 and figure 2 As shown, it is a visual inspection device for a replaceable eye chart according to the present invention, which includes a box body 100, a ring-shaped eye chart 110 arranged in the box body 100, a transmission shaft 130, a drive shaft 120, a drive device 140 and a drive handle 141 .

[0013] The lighting device required by the vision detection device, such as a fluorescent lamp, is arranged in the box body 100 .

[0014] The ring-shaped vision chart 110 is formed by connecting the main vision chart and the backup vision chart. The ring-shaped vision chart 110 is arranged on the casing 100 through the transmission shaft 130 and the drive shaft 120 and can rotate around the transmission shaft 130 and the driv...

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Abstract

The invention discloses a vision detecting device with replaceable visual charts, comprising a box body, a visual chart, a standby visual chart, a lighting device, a driving shaft, a transmission shaft and a driving device, wherein the visual chart and the standby visual chart are arranged in the box body and wound into a closed ring through a rolling shaft; the driving device is connected with the rolling shaft; and the visual chart and the standby visual chart are mutually switched under the drive of the rolling shaft. The vision detecting device has the beneficial effects that different visual charts can be freely switched, the condition that a testee remembers the contents of the visual charts in advance is stopped, and the fairness of visual test is improved.

Description

technical field [0001] The invention relates to an eye chart light box, in particular to a visual acuity detection device which can replace the eye chart. Background technique [0002] An eye chart is a picture for testing eyesight. There are several rows of symbols or letters printed on the picture, and the size of each row is different. The strength of eyesight is judged by the size of the symbols or letters that can be seen clearly. The eye chart light box is to place the eye chart in the bright light of the light box, so that the testee can test the vision under the appropriate illumination to ensure the accuracy of the vision test. Among the testees, some people sometimes try to cheat for some reason and memorize the arrangement of the symbols or letters on the eye chart in advance, which affects the correctness and fairness of the vision test. Contents of the invention [0003] The purpose of the present invention is to provide a vision testing device that can repla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/032
Inventor 朱兆园
Owner THE SECOND FOREIGN LANGUAGE SCHOOL AFFILIATED TO SHANGHAI NORMAL UNIV
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