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US 10,870,309 B2Granted
Sharpener
OwnerYoshikazu Taniinventor
Life of this patent
Estimating the term…
Abstract
The sharpener includes a main body into which the tip portion of the pencil is inserted, and a blade portion installed inside the main body. The tip portion of the pencil is inserted into the main body, and a guide hole for guiding the tip portion of the inserted pencil to the blade portion is formed in the main body. The pencil slides in the guide hole in an axial direction, and the blade portion sharpens the tip portion of the pencil along a plane inclined with respect to the axial direction.
Claims19
A sharpener for sharpening a pencil having an unsharpened portion and a writing tip portion to be sharpened, the sharpener comprising:
- a main body having a fixing member and a cover detachably mounted on the fixing member, the cover having a front side, a rear side opposite the front side, and a guide hole, the guide hole having a first opening on the rear side and a second opening on the front side to accommodate a passage of the writing tip portion of the pencil through the main body;
- a blade portion installed on the fixing member and located inside the main body, wherein the blade portion comprises:
- a blade edge that is located at a fixed position to cut into the pencil when the pencil is drawn out of the first opening and through the guide hole in an axial direction, in order to sharpen the writing tip portion of the pencil when the blade edge is located at the fixed position;
- and
- a blade surface extending from the blade edge in a direction which is inclined with respect to the axial direction;
- and
- a contact portion located within the guide hole and located between the blade edge and the second opening of the guide hole, wherein the fixed position of the blade edge is fixed relative to the contact portion,
- wherein the contact portion is configured to raise the pencil away from the fixed position of the blade edge to prevent contact between the pencil and the blade edge when the unsharpened portion of the pencil contacts the contact portion.
5 more elements
A sharpener comprising:
- a main body having a front side, a rear side opposite the front side, and a guide hole having a first opening on the rear side and a second opening on the front side, the guide hole to accommodate a passage of a pencil through the main body in an axial direction;
- a blade located adjacent the guide hole, the blade having a blade edge located at a fixed position to cut into the pencil when the pencil is drawn out of the first opening and through the guide hole;
- and
- a contact portion located within the guide hole and located between the blade edge and the second opening of the guide hole,
- wherein the contact portion is located higher than the blade edge so that a first distance in an upward-downward direction that is transverse to the axial direction, taken between the contact portion and an inner peripheral surface of the guide hole facing the contact portion in the upward-downward direction, is less than a second distance in the upward-downward direction taken between the blade edge and the inner peripheral surface of the guide hole, wherein the second distance is taken when the blade edge is positioned at the fixed position to cut into the pencil, and
- wherein the contact portion is configured to raise the pencil away from the fixed position of the blade edge to prevent the pencil from contacting the blade edge when an unsharpened side surface of the pencil contacts the contact portion.
3 more elements
Dependencies are inferred from the claim text.