| 摘要 |
A puncher having a replaceable knife holder comprises a base, a knife holder, and a wastepaper-storing case. A cover is pivotally mounted in the front of the base. The front edge of the cover is extended to the knife-holding groove such that the knife-holding groove only provides the paper-only space for holding the paper. The paper is precisely punched by adjusting the adjusting knob mounted on a front panel of the cover. The knife holder is tightly fixed by a plurality of screwing knobs. A plurality of knives is mounted on a pressing plate that mounts on the backside of the knife holder. The knife holder is tightly fixed by the screwing knobs so the knife holder can be easily detached and replaced by another knife holder having different hole type and hole number. Besides, the cover also facilitates assembly and maintenance of the knife holder.
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