| 摘要 |
A laborsaving hole puncher has a base, at least one cutter, a top cover and at least one articulated linkage. The base has at least one bracket. The least one cutter slidably is mounted respectively on the at least one bracket. The top cover is mounted pivotally on the at least one bracket. The least one articulated linkage connects respectively to the at least one bracket, the at least one cutter and the top cover and each articulated linkage has an upper link and a lower link. The upper link is mounted pivotally on the top cover. The lower link is mounted pivotally on the upper link and is mounted pivotally on one bracket and has an intermediate segment mounted to one cutter. The at least one articulated linkage makes people easily conveniently use the laborsaving hole puncher without strenuous effort.
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