A blade sharpener has a frame, first and second rods, a first hub, and a second hub. The first and second rods are adapted and configured to engage a blade to be sharpened. The first hub is operatively connected to the frame and the first rod. The second hub is operatively connected to the frame and the second rod. The first hub being rotatable between an outer position of the first rod relative to the frame and an inner position of the first rod relative to the frame. The second hub being rotatable between an outer position of the second rod relative to the frame and an inner position of the second rod relative to the frame.

A storage box includes a base having a bottom portion with inner and outer surfaces, and a peripheral wall surrounding the bottom portion to form a storage space with the inner surface. The outer surface has a placing slot and a knife sharpener fixing portion adjacent thereto. When the user places a knife sharpener in the storage space and closes a covering plate, the whole storage box is portable. The knife is sharpened when the covering plate is detached and embedded in the placing slot while the bottom portion is orientated upward, and the knife sharpener is disposed on the knife sharpener fixing portion. The user moves a knife back and forth between the knife sharpener by one hand and puts the other hand beside the covering plate to avoid being gashed by the knife in the knife sharpening process, thereby achieving protection purpose.

A storage box includes a base having a bottom portion with inner and outer surfaces, and a peripheral wall surrounding the bottom portion to form a storage space with the inner surface. The outer surface has a placing slot and a knife sharpener fixing portion adjacent thereto. When the user places a knife sharpener in the storage space and closes a covering plate, the whole storage box is portable. The knife is sharpened when the covering plate is detached and embedded in the placing slot while the bottom portion is orientated upward, and the knife sharpener is disposed on the knife sharpener fixing portion. The user moves a knife back and forth between the knife sharpener by one hand and puts the other hand beside the covering plate to avoid being gashed by the knife in the knife sharpening process, thereby achieving protection purpose.

Provided is a device for observing and positioning a sharpening angle of a cutting edge. The device includes a spirit bubble for observing a change of a sharpening angle of a cutting edge and positioning the sharpening angle of the cutting edge, and a base for fixing the device on a knife body. The spirit bubble is rotatably connected to the base for adjusting an angle between the spirit bubble and the base. The device enables, in a dynamic process of grinding a cutting edge of a knife, a grinder to continuously remain in a correct sharpening angle range and grind the cutting edge in accordance with a correct sharpening angle of the knife when holding the knife to perform a grinding action, and also meets a requirement for controlling sharpening angles of cutting edges of knives with various edge shapes in respective edge grinding processes of the knives.

Provided is a device for observing and positioning a sharpening angle of a cutting edge. The device includes a spirit bubble for observing a change of a sharpening angle of a cutting edge and positioning the sharpening angle of the cutting edge, and a base for fixing the device on a knife body. The spirit bubble is rotatably connected to the base for adjusting an angle between the spirit bubble and the base. The device enables, in a dynamic process of grinding a cutting edge of a knife, a grinder to continuously remain in a correct sharpening angle range and grind the cutting edge in accordance with a correct sharpening angle of the knife when holding the knife to perform a grinding action, and also meets a requirement for controlling sharpening angles of cutting edges of knives with various edge shapes in respective edge grinding processes of the knives.

A magnetic sharpening jig, in particular for holding, by magnetic force, a cutting tool which is to be sharpened or polished and which includes a magnetizable blade, and for positioning said cutting tool relative to a sharpening and/or polishing tool, e.g. a rolling sharpener. In order to provide a versatile magnetic sharpening jig, the magnetic sharpening jig includes at least one flexible contact element with which the magnetically attracted blade of the cutting tool comes into contact during normal operation. Also disclosed are a set including a magnetic sharpening jig and a rolling sharpener, as well as a method for sharpening or polishing the cutting tool using the magnetic sharpening jig.

A magnetic sharpening jig, in particular for holding, by magnetic force, a cutting tool which is to be sharpened or polished and which includes a magnetizable blade, and for positioning said cutting tool relative to a sharpening and/or polishing tool, e.g. a rolling sharpener. In order to provide a versatile magnetic sharpening jig, the magnetic sharpening jig includes at least one flexible contact element with which the magnetically attracted blade of the cutting tool comes into contact during normal operation. Also disclosed are a set including a magnetic sharpening jig and a rolling sharpener, as well as a method for sharpening or polishing the cutting tool using the magnetic sharpening jig.

A method for producing a rolling sharpener having at least one grinding or polishing face for grinding and/or polishing a cutting tool, the rolling grinder being formed substantially from two rollers, a grip body to be arranged between the rollers and rotatably relative thereto, and a shaft to be supported rotatably in the grip body. To make correct operation of the rolling grinder user-friendly and to facilitate correct operation overall, each of the rollers is connected to the shaft in a frictionally engaged manner.

A knife handle comprising a handle body with a proximal end and a distal end, a sharpener body removably attached to the handle body, the sharpener body comprising at least one cut-away for housing a replaceable sharpener, the sharpener body rotatable relative to the handle body, and a selectively actuatable locking mechanism for locking the sharpener body in place on the handle body. The selectively actuatable locking mechanism may have a first, locked position wherein the sharpener body cannot rotate relative to the handle body and a second, open position wherein the sharpener body can rotate relative to the handle body. The selectively actuatable locking mechanism may be biased in the first, locked position.

A method for producing a roll grinder with two running rollers, a handle body arranged between the running rollers and can be rotated relative thereto, and at least one grinding or polishing surface. The method includes steps of: producing the handle body; measuring the handle body in order to determine the actual dimensions of the handle body; providing at least two differently dimensioned types of spacer elements, by means of each of which a different distance can be set between one of the running rollers and the handle body in the installed state of the roll grinder compared to at least one other type; selecting one of the types of spacer elements provided depending on the measured dimension of the handle body; and connecting the handle body to the running rollers to form the roll grinder while using at least one spacer element of the type selected.