一般圆规使用的铅心直径为2mm,使用前,先要把铅心削尖,连续使用时就要经常削铅芯。用刚削好的铅心画出来的线条很细,但铅心尖头很快被磨去而使线条变粗。这样画出来的线条是先细后粗,影响图面质量,工效也不高,而且不换附件不能画小圆。为此,我们设计了一种新颖的圆规活动铅笔脚,经使用,效果良好,简介如下: 结构 L形圆规铅笔脚由L形铅笔脚和活动铅笔等组成,其中L形铅笔脚又由铅笔脚插头和对开夹紧机构组成,见图1,它可安装在各种类型、型号的圆规及其附件上。各个零件的形状和要求见图2,材料可用金 Lead diameter of the general compass used 2mm, before use, we must first lead sharpening, continuous use of lead-off should always be cut. With just cut a good lead to draw a very thin lines, but the lead tip quickly worn away and make the lines thicker. The lines drawn in this way are fine and rough, affecting the surface quality and ergonomics are not high, and can not draw a small circle without changing attachments. To this end, we have designed a novel compasible activity pencil foot, the use of good effect, as follows: Structure L-shaped compasses pencil foot by the L-shaped pencil and movable pencil and other components, including L-shaped pencil foot by the pencil foot Plug and split clamping mechanism, shown in Figure 1, it can be installed in various types and models of compasses and accessories. The shape of the various parts and requirements shown in Figure 2, the material available gold