| 摘要 |
<p>A myopia preventor for ear is composed of a body (1), a cover (2), a voice IC (3), an annunciator (4), a power switch (5), a forward slant switch (6), a left slant switch (7) and a right slant switch (8). While using it, we just need turn on the power and hang the preventor on students'ears. When the angles which students' heads slant forward or left or right exceed stated angles, the annunciator generates sound or music to remind students to keep right pose. The invention has the advantages of having simple structure, costing low and operating conveniently.</p> |
