随着时代的进步,科技的发展,教学设施也越来越轻捷、方便.但现在教学中所用的示教圆规,还存在着较大的缺陷,如针尖不能在黑板上固定,尺寸太大,不易操作等等.在使用过程中,根据示教圆规的实际使用环境,参照游标卡尺、天平的设计思想,我构思了对示教圆规的改造方案.具体构思如下: With the advancement of the times and the development of science and technology, teaching facilities have become more and more frivolous and convenient. However, the teaching compasses used in teaching are still relatively flawed. For example, the needle tip cannot be fixed on the blackboard, and the size is too large. It is not easy to operate, etc. In the course of use, according to the actual use environment of teaching compasses, with reference to the design ideology of vernier caliper and balance, I have conceived a plan for the transformation of teaching compasses. The specific ideas are as follows: