Multi-blade pencil sharpener
A pencil sharpener and blade technology, applied in the field of stationery, can solve the problems of up and down fluctuation of the pencil, unsharp edge, and large contact angle between the lead and the blade, so as to reduce the force of sharpening, reduce the risk of breakage, and reduce the risk of clogging.
Inactive Publication Date: 2013-05-08
SICHUAN UNIV
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- Application Information
AI Technical Summary
Problems solved by technology
[0002] The blades of commonly used pencil sharpeners are generally iron sheets, which are prone to rust and cause the edge of the knife to be unsharp
[0003] Because the pen hole of the pencil sharpener is a conical surface, the pen hole is relatively short, which easily causes the pencil to fluctuate up and down in the direction of travel, resulting in a large contact angle between the lead core and the blade; The wooden material of the pencil is cut, and there is only one blade,
Method used
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Embodiment Construction
[0017] The shape of the pencil sharpener is composed of a cylinder or a cuboid and a cone. There is a pen hole 1 inside. The pen hole is composed of a large cylinder 4, a conical surface 5 and a small cylinder 6. The diameter of the large cylinder is 7-8mm, and the length 15-20mm, the diameter of the small cylinder is 2mm, the conical surface connects the large cylinder and the small cylinder. -20 degrees, 3-4 convex ribs 7 are symmetrically distributed on the conical surface, the convex ribs are 1mm higher than the conical surface, and a rectangular hole is milled from the outside of the cone, the width of the hole is 1mm, and the plane of the rectangular hole is 8 to the central plane of the cone. -10 degree angle, the rectangular hole just cuts half of the convex edge, and the remaining half of the convex edge forms a blade 2.
[0018] If there are four convex ribs, two convex ribs that are symmetrical about the center can be made into a group. Seen from the direction of ro...
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Abstract
The invention discloses a multi-blade pencil sharpener, belongs to the field of stationeries, and particularly relates to a pencil sharpener for cutting pencils. A pencil hole of a common pencil sharpener is a conical surface and is short, a blade is easy to abrade and rust, and a pencil core is easy to break. A pencil-sharpening machine is small in the front end, so that broken pencil core blocks at the front end easily, and the usage of the pencil-sharpening machine is affected. To reduce the risk of breaking the pencil core, the invention discloses the multi-blade pencil sharpener. The technical scheme is that that multi-blade pencil sharpener is internally provided with a pencil hole which is composed of a large cylinder, a conical surface and a small cylinder, the conical surface is connected with the large cylinder and the small cylinder, and three to four protruding edges are symmetrically distributed on the conical surface. The protruding edges are higher than the conical surface by 1mm, a rectangular hole is milled outside a cone which rightly incises half protruding edges, and a cutter opening is formed by the remaining protruding edges. The multi-blade pencil sharpener has the advantages that the front end of a pencil is enabled to be stressed evenly, the large cylinder is beneficial for stabilizing the pencil advancing direction of the pencil, the small cylinder is beneficial for cutting powder of the pencil leaking, and blades can be polished.
Description
technical field [0001] The invention relates to the field of stationery, in particular to a pencil sharpener for sharpening pencils. Background technique [0002] The blades of commonly used pencil sharpeners are generally iron sheets, which are prone to rust and cause the edge of the knife to be unsharp. [0003] Because the pen hole of the pencil sharpener is a conical surface, the pen hole is relatively short, which easily causes the pencil to fluctuate up and down in the direction of travel, resulting in a large contact angle between the lead core and the blade; The wooden material of the pencil is cut, and there is only one blade, which easily leads to uneven force; when the contact angle is large and the force is large, the pencil lead is easily broken. [0004] Now there is a pencil sharpener that reduces the risk of breaking the pencil, but because the front end is small, it is easy to cause the broken lead to block the front end, resulting in the inability of subse...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B43L23/08
Inventor 胡再国
Owner SICHUAN UNIV