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Stapler is one of the common office supplies.The theory is a kind of equal armed lever.Due to the structural characteristic of staplers, the process of using is not labor-saving,even toilsome.This product is designed to solve the problem.By reforming the upper part of the ordinary stapler,its length can be lengthed forward a proper extent.Thus, the stapler can lengthen the length of arm of force and make it become a labor-saving lever, which makes people get rid of the trouble of stapling files. Especially for females and children,"labor-saving stapler" can improve the efficiency of stapling files.
Dalian Nationalities University
Xuefei Liu Di Fang Desheng Si Chengcheng Gu