CN215944149U

CN215944149U - Pencil sharpener hob

Info

Publication number: CN215944149U
Application number: CN202120535662.4U
Authority: CN
Inventors: 王可佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-03-04
Anticipated expiration: 2031-03-15

Abstract

The utility model relates to a hob for a pencil sharpener. A pencil sharpener hob cutter is characterized in that two kinds of cutting edges are arranged on the hob cutter, and a protruding cutting edge higher than the conventional cutting edge is added on the basis of the conventional cutting edge of the pencil sharpener hob cutter in the prior art. At present, no pencil sharpener capable of directly sharpening eyebrow pencils with flat penpoints and 2B pencils exists in the prior art. On the basis of fully utilizing the working principle and the characteristics of the traditional pencil sharpener, the structure of the hob is changed, so that the pencil sharpener can directly cut flat penpoints to replace manual eyebrow pencil cutting and card coating pencils. The utility model has the advantages that the cutting function of the pencil sharpener is expanded, and the function of directly cutting the flat pencil point can be realized by slightly changing and perfecting the prior art.

Description

Pencil sharpener hob

Technical Field

The utility model relates to a pencil sharpener, in particular to a hob of a pencil sharpener.

Background

In the field of pencil sharpener, especially pencil sharpener using hob cutter, because its working principle is that hob cutter rotates along the cutting object, the cut pencil point can only be conical or truncated cone shape, and there is no pencil sharpener for cutting flat pencil point directly in the existing technology. The eyebrow pencils and the card coating pencils are products which are more suitable for use only by cutting flat penpoints, particularly the eyebrow pencils, because the pencil cores are soft, the flat penpoints are always cut by hands, the success rate is low, and unnecessary waste and inconvenience are caused to users; also, the cutting of 2B pencils for taking exam cards, while relatively easy, is still inconvenient for students to manually cut.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a pencil sharpener for directly sharpening a flat pencil point for a user on the basis of controlling the eccentricity to the maximum extent by utilizing the hobbing cutter cutting characteristic of the pencil sharpener, and replacing manually sharpening eyebrow pencils and coating pencils.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a pencil sharpener hob cutter, said hob cutter has two kinds of cutting edges, it is a higher than the conventional cutting edge on the basis of the conventional cutting edge of the existing pencil sharpener hob cutter, that is, said hob cutter is equipped with a raised cutting edge besides the conventional cutting edge, because the moving gear on the hob cutter is meshed with the fixed gear on the frame for transmission, the rotating process of the cutter frame drives the hob cutter to rotate in the opposite direction when the pencil sharpener works, the hob cutter edge is forced to rotate and cut in the opposite direction around the rotating edge of the cutting object along with the cutter frame, the raised cutting edge is a part of the hob cutter and has a spiral with a specific angle, the raised cutting edge cuts a plane part in the movement time difference between the cutter frame and the hob cutter, and at the same time, the conventional cutting edge cuts the side part of the circular truncated cone like the ordinary pencil sharpener, only needs to be thicker than the pencil core cut by the ordinary pencil sharpener, and leaves a cylindrical part with a certain length on the top of the circular cone, so that the pencil sharpener can finally sharpen the flat pencil point.

The further preferred scheme is as follows: the hob cutter is characterized in that the protruding cutting edge on the hob cutter is only provided with 1-2 cutting edges, the conventional cutting edge is connected with the moving gear through a cylinder lower than the conventional cutting edge, the protruding cutting edge is arranged on the conventional cutting edge and the cylinder and is higher than the conventional cutting edge, an included angle is formed between the cutting surface of the protruding cutting edge and the cutting surface of the conventional cutting edge, and one end of the protruding cutting edge close to the cylinder is longer than the conventional cutting edge by one section. The cylinder is used for making the pen point continuously move forward for a certain distance after the cutting of the circular truncated cone shape is completed, and a cylinder part with a certain length is formed, and at the same time, the convex blade is used for cutting the pen point into a flat pen point, and the cylinder is used for controlling the length of the cut pen core.

The further preferred scheme is as follows: the pencil sharpener is characterized in that two hobs are arranged on a sharpener cutter frame, protruding cutting edges and conventional cutting edges are arranged on the two hobs respectively, a plane and a circular truncated cone side face can be cut simultaneously, a cylindrical part can be reserved, the two hobs are symmetrically arranged along a cutter frame axis, the two hobs are opposite to each other, a pencil is supported by the two opposite hobs, eccentricity is prevented, and an accurate mutual supporting effect is achieved.

Compared with the prior art, the utility model has the advantages that the cutting function of the pencil sharpener is expanded, the function of directly cutting the flat pen point can be realized by slightly changing and perfecting the prior art, and the cutting problem in the field of eyebrow pencils and card coating pencils is solved.

Drawings

Fig. 1 is a schematic view of the hob structure of the present invention.

FIG. 2 is a schematic cross-sectional view taken at A-A of FIG. 1 according to the present invention

FIG. 3 is a partial schematic view of a penknife equipped with the roller cutter of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 3, a hob cutter 1 for a pencil sharpener, said hob cutter 1 having two kinds of cutting edges, is to add a raised cutting edge 12 higher than the conventional cutting edge 11 on the basis of the conventional cutting edge 11 of the hob cutter of the pencil sharpener in the prior art, that is, besides the conventional cutting edge 11, the hob cutter 1 is further provided with a raised cutting edge 12, since the moving gear 14 on the hob cutter 1 is meshed with the fixed gear 5 on the frame for transmission, the rotation process of the tool holder 6 during the pencil sharpener operation drives the hob cutter 1 to rotate in the opposite direction, the hob cutter 1 is forced to rotate and cut in the opposite direction along with the rotation of the tool holder 6 around the cutting object, the raised cutting edge 12 is a part of the hob cutter 1 and has a spiral with a specific angle, so that the raised cutting edge 12 cuts a plane part in the movement time difference between the tool holder 1 and the hob cutter 1, and at the same time, the conventional cutting edge 11 cuts a side part like a common pencil sharpener, the pencil lead is thicker than the pencil lead cut by a common pencil sharpener, and a cylindrical part with a certain length is reserved at the top end of the circular truncated cone, so that the pencil sharpener can finally cut a flat pencil point.

The hob cutter 1 is characterized in that the protruding blade 12 on the hob cutter 1 is only provided with 1-2 blades, the conventional blade 11 is connected with the moving gear 14 through a cylinder 13 lower than the conventional blade 11, the protruding blade 12 is arranged on the conventional blade 11 and the cylinder 13 and is higher than the conventional blade 11, an included angle is formed between the blade surface of the protruding blade 12 and the blade surface of the conventional blade 11, and one end of the protruding blade 12 close to the cylinder 13 is relatively longer than the conventional blade 11. The function of this cylinder 13 is to allow the nib to continue to advance a distance after the cutting of the truncated cone shape is completed and to form a cylindrical portion of a certain length, while the protruding cutting edges 12 cut the nib flat, in effect this cylinder 13 controls the length of the lead cut.

Examples

As shown in fig. 1 to 3, two hobs 1 are arranged on a penknife rest 6 of the pencil sharpener, a raised cutting edge 12 and a conventional cutting edge 11 are respectively arranged on the two hobs 1, a plane and a circular truncated cone side face can be cut simultaneously, a cylindrical part is reserved, the two hobs 1 are symmetrically arranged along the axis of the penknife rest 6, the hobs which are opposite to each other support pens to prevent eccentricity, and an accurate mutual supporting effect is achieved.

Claims

1. The pencil sharpener hob cutter is characterized in that the hob cutter is provided with two kinds of cutting edges, and a raised cutting edge higher than the conventional cutting edge is added on the basis of the conventional cutting edge of the pencil sharpener hob cutter in the prior art.

2. The sharpener hob according to claim 1, characterized in that the raised cutting edge on the hob is only 1-2 cutting edges, the regular cutting edge is connected with the moving gear by a cylinder lower than the regular cutting edge, the raised cutting edge is arranged on the regular cutting edge and the cylinder and higher than the regular cutting edge, an included angle exists between the cutting surface of the raised cutting edge and the cutting surface of the regular cutting edge, and the raised cutting edge is extended by a section near the cylinder relative to the regular cutting edge.