CN2702868Y

CN2702868Y - Pencil sharpener

Info

Publication number: CN2702868Y
Application number: CN 200420062311
Authority: CN
Inventors: 陈军
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-29
Filing date: 2004-06-29
Publication date: 2005-06-01
Anticipated expiration: 2014-06-29

Abstract

The utility model relates to a pencil sharpener which can not break off lead of pencil when sharpening pencil. The utility model comprises a shell, a knife blade, a guide groove and a baffling block arranged on the front end of guide groove which forms the approximative top part of a circular cone on the guide groove. The distance of the plane between the baffling block and the open end of the guide groove is smaller than the height of the circular cone. The guide groove forms a space whose shape is like an approximative truncated circular cone by the additional installation of the baffling block. The frangible state caused by too shape of the front end of the lead presenting the circular cone in use can be avoided; meanwhile, the lead of pencil is non-perishable during sharpening the pencil. The utility model has the advantages of simple structure, convenience and practicality.

Description

Pencil-knife

(1) technical field:

The utility model relates to a kind of stationery, particularly relates to a kind of pencil-knife.

(2) background technology:

Pencil-knife of the prior art (or claiming pencil sharpener) is one of stationery of using always, it is made up of housing, blade, guide groove etc., described housing is the rectangular box that blade is housed on the cover plate, described guide groove is positioned at housing and forms a cavity that is approximately the normal cone body, the openend of guide groove is positioned on the side of housing, the cutting edge of described blade is positioned at the bus inboard of this cone, and basic and this cone is tangent, and described guide groove front end is that the space at position, cone summit increases suddenly.The pencil that is column moves ahead and is cone by blade cut along the guide groove rotation, and lead for retractable pencil is a cone by blade cut also.The deficiencies in the prior art part is that the pencil-lead front end of planing out is too sharp-pointed, frangibility during use, simultaneously, also frangibility of pen core during planing.

(3) summary of the invention:

The pen core pencil-knife of frangibility not when the utility model aims to provide a kind of the planing.

Technical solution of the present utility model is as follows:

A kind of pencil-knife, comprise housing, blade, guide groove, described housing is the box body that blade is housed on the cover plate, described guide groove is positioned at housing and forms a cavity that is approximately the normal cone body, the openend of guide groove is that the bottom surface of cone is positioned on the side of housing, the cutting edge of described blade is positioned at the bus inboard of this cone, and it is basic and this cone is tangent, it is characterized in that: it also includes and is fixedly installed in the guide groove front end is the stopper that guide groove forms a position, cone summit that is approximately, and this stopper is slightly less than the height of cone to the distance on the plane, openend place of guide groove.

In the above-mentioned technical scheme, the existence of stopper makes guide groove form the round platform of the cone that a space is approximately, the situation of frangibility when thereby it has avoided the pencil-lead front end of planing out too sharply to cause using because of being cone, simultaneously, also frangibility not during planing.

Special needs to be pointed out is that at this stopper must be fixedly installed in the guide groove front end, its working face is certain to the distance on the plane, openend place of guide groove when promptly working, otherwise, still can fracture during planing.

The utility model is simple in structure, and is convenient and practical, and effect is obvious.

(4) description of drawings:

Accompanying drawing 1 is the schematic diagram of the utility model embodiment;

Each sequence number is respectively among the figure: 1, housing, 2, stopper, 3, cover plate, 4, blade, 5, installation nut, 6, cutting edge, 7, guide groove

(5) specific embodiment:

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail:

Referring to accompanying drawing, the utility model embodiment is by the uncovered rectangular box-like housing 1 that has the guide groove mouth on the side, by being installed, nut 5 is installed on blade 4 on the rectangular box inner cover plate 3, be positioned at housing 1 and be guide groove 7 compositions that are approximately the cavity of normal cone body, the openend of guide groove 7 is that the bottom surface of cone is positioned on the side of housing 1, the cutting edge 6 of described blade 4 is positioned at the bus inboard of this cone, and it is basic and this cone is tangent, the position, summit that guide groove 7 front ends promptly are approximately cone fixedly mounts a plastics stopper 2, and this stopper is slightly less than the height of cone to the distance on the plane, openend place of guide groove.Because the existence of this stopper 2, in fact guide groove is the round platform of the cone that is approximately, like this, thereby the pencil-lead front end of planing out with regard to not being cone frangibility during too sharp-pointed the use, simultaneously, also frangibility not during planing.

Claims

1, a kind of pencil-knife, comprise housing, blade, guide groove, described housing is the box body that blade is housed on the cover plate, described guide groove is positioned at housing and forms a cavity that is approximately the normal cone body, the openend of guide groove is positioned on the side of housing, the cutting edge of described blade is positioned at the bus inboard of this cone, and it is basic and this cone is tangent, it is characterized in that: it also includes and is fixedly installed in the guide groove front end is the stopper that guide groove forms the position, summit of a cone that is approximately, and this stopper is slightly less than the height of cone to the distance on the plane, openend place of guide groove.