Adjustable pencil sharpener
AssigneeSDI Corporation
InventorSzu-Yu Chen
Life of this patent
Estimating the term…
Abstract
A pencil sharpener has a waste case, a blade base, a blocking chunk, a blade, a rotating knob and an adjusting shaft. The waste case has a mounting hole and multiple positioning segments formed on the inner wall of the mounting hole. The blocking chunk is moveably mounted on the bottom of the blade base along an axial direction of the blade base. The blade is mounted securely on the blade base. The rotating knob is mounted rotatably in the mounting hole in the waste case and has at least one engaging segment selectively engaging the positioning segments of the waste case. The adjusting shaft is connected securely with the rotating knob and is disposed on the blocking chunk. When the rotating knob is rotated, the adjusting shaft is rotated to push the blocking chunk to move along the axial direction of the blade base.
Claims16
A pencil sharpener comprising:
- a waste case having
- a mounting hole defined in the waste case and having an inner wall;
- and
- multiple positioning segments formed on the inner wall of the mounting hole;
- a blade base mounted in the waste case and having a bottom;
- a blocking chunk moveably mounted on the bottom of the blade base along an axial direction of the blade base and having a bottom;
- a blade mounted securely on the blade base;
- a rotating knob mounted rotatably in the mounting hole of the waste case and having
- a front side;
- a rear side;
- an operating rib formed on the front side of the rotating knob and exposed from an outer surface of the waste case;
- and
- at least one connecting tab formed on and protruding from the rear side of the rotating knob and mounted rotatably through the mounting hole in the waste case, and each one of the at least one connecting tab having
- an outer surface;
- a holding block formed on one end of the connecting tab and engaging an edge of the mounting hole;
- and
- at least one engaging segment formed respectively on the outer surface of the at least one connecting tab, wherein each one of the at least one engaging segment selectively engages one of the positioning segments of the waste case;
- and
- an adjusting shaft connected securely with the rotating knob and disposed on the bottom of the blocking chunk, wherein when the rotating knob is rotated, the adjusting shaft is rotated to push the blocking chunk to move along the axial direction of the blade base.
Dependencies are inferred from the claim text.