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该螺旋测微器包括U形尺架、小砧、测微螺杆、主尺、螺旋尺、旋钮以及微调旋钮,其还包括一游标尺筒,游标尺筒可移动设置于主尺上,游标尺筒由多条等间距的与中心线相平行的直线组成。本实用新型结构简单,使用方便,在原有的螺旋测微器的基础上进行改进,在主尺上增设一刻有刻度的游标尺筒,其上的总刻度比螺旋尺上同样的长度小1个分度,这样游标尺筒上每1个刻度比原筒上最小刻度小1/10个分度,1个分度在螺旋尺上表示0.01 mm,即游标尺筒上每个刻度比螺旋尺代表的刻度小0.001 mm,大大提高了螺旋测微器的精度。
The spiral micrometer includes a U-shaped ruler, a small anvil, a micrometer screw, a main ruler, a helical ruler, a rotary knob, and a trimming knob. The micrometer also includes a cursor ruler which is movably disposed on the main ruler. Cylinder by a number of equally spaced and the center line parallel to the composition. The utility model has the advantages of simple structure and convenient use. The utility model is improved on the basis of the original spiral micrometer. A scale graduated vernier scale cylinder is added on the main scale, the total scale on the main scale is smaller than the same length on the spiral scale by one Indexing, so that each ruler on the scale ruler than the original cylinder on the smallest scale of 1/10 sub-index, a sub-index on the screw that 0.01 mm, that the cursor ruler than each scale on behalf of spiral scale The small scale of 0.001 mm, greatly improving the accuracy of spiral micrometer.