上几何课时,我经常看到数学老师因为教学圆规笨重、不方便而不喜欢使用,干脆用手画,但又画不圆,从那时起,我便一直想设计一种既操作简便又便于携带的圆规。后来我从老师上课时用磁铁固定挂图中得到了启发,我想:能否用磁铁来固定圆心呢?我把这个想法告诉了学校负责科技课的吴清凉老师,吴老师很支持。 During the geometry class, I often saw mathematics teachers not using it because of the heavy, inconvenient teaching compasses. I simply used my hand to draw but I didn’t draw a circle. Since then, I have always wanted to design a simple and easy operation. Carry compasses. Later, I was inspired by the use of a magnet-mounted flip chart in my teacher’s class. I thought: Can we use a magnet to fix the center of the circle? I told the teacher Wu Qingliang who is responsible for science and technology in the school. Teacher Wu is very supportive.