Abstract: A sharpener contains a housing having a receiving channel for a pencil which is to be sharpened. The sharpener is intended to be seated as a protective cap, when the pencil is not in use, with a clamping fit on the pencil circumference. The clamping connection necessary for this purpose is an external clamping-force producer which can be removed manually from acting on the housing, in particular a cleaning stick, with, for the purpose of providing the clamping force, is for example a pressure-exerting lug in the form of a wedge or with an eccentric.

Abstract: A sharpener (1) contains a housing (5) with a blade (13) which is screwed on said housing and forms a tangent to a hollow-conical region (6b) of a guide channel (6) for the pencil (2), said hollow-conical region adjoining a hollow-cylindrical region (6a), a bending edge (19) being formed in the process. In the fixed position, the blade (13) is subjected to bending stressing in that, with the outer end (14) of the blade (13) being guided beneath the housing-side protrusion (16), the inner end (18) of said blade is fixed on the housing (5), the blade (13) being bent about the bending edge (19) in the process. This thus provides particularly secure and space-saving blade fixing (12) at both ends.