Abstract: A pencil sharpener that has a strong clamping force, does not leave marks on the surface of the pencil due to clamping, and is easy to manufacture. The pencil sharpener includes a housing having a pencil insertion hole and a plurality of pivot parts arranged in a concentric circle around the pencil insertion hole, a frame body having a plurality of arc-shaped grooves, and a plurality of cam-shaped members that are pivotably attached to the pivot parts. When the frame body pivots, the cam-shaped members relatively move while being guided by the grooves, and their distal ends swing in a direction in which they move closer to or away from an insertion hole, and thereby a pencil that has been inserted is fixed or released.

Abstract: There is provided a punch comprising: a punch blade; a guide passage; a stand that has a flat surface orthogonal to the guide passage, wherein sheets placed on the stand are perforated by operating a handle, and wherein a slit is provided to an upper surface of the stand, a gauge member is slidably inserted into the slit, and the stand and the gauge member are made to be flush. The gauge member is provided with a standing portion, to which an end portion of the sheets is abutted, at one end portion of the gauge member while the gauge member is also provided with a flexible banding member toward the other end portion, wherein the banding member is curved so as to be housed into an interior of the stand.