CN2286458Y

CN2286458Y - Rotational type pencil sharpener

Info

Publication number: CN2286458Y
Application number: CN 96212679
Authority: CN
Inventors: 王树海; 刘京玲
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-19
Filing date: 1996-05-19
Publication date: 1998-07-22
Anticipated expiration: 2006-05-19

Abstract

The utility model discloses a rotary type pencil sharpener which can cut wooden pole pencils with longer exposed lead cores. In an existing pencil sharpener composed of a cutting frame and a cutting blade which is arranged on the cutting frame, the shape of the cutting blade is changed, namely, the cutting edge of the cutting blade is changed into non-line shape, or the assembly position of the cutting blade is changed, namely, the cutting edge is not arranged in the same plane with the axial cord of the pencil core of a pencil in cutting the pencil. Thus, the exposed part of the pencil core of the pencil cut by the rotary type pencil sharpener is longer, which is convenient for use.

Description

Rotating lead pencil knife

The utility model relates to a kind of rotating lead pencil knife that is used for Wood-bar pencil, especially can make the long rotating lead pencil knife of cutting out of pencil lead exposed part.

At present, known rotating lead pencil knife is to adopt the linear pattern blade, its rigging position make its in use blade and pencil lead axis be in the same plane, thereby the machined surface of the pencil of cutting out just is a taper seat.Because the minimum process angle that the Wood pencil bar has limited this processing conical surface, thereby the lead for retractable pencil exposed part of the pencil of cutting out is very short.

The purpose of this utility model provides a kind of rotating lead pencil knife, and it not only can cut Wood-bar pencil by rotation, and can make the pencil lead exposed part of cutting out longer.

The purpose of this utility model is achieved in that from the blade of rotating lead pencil knife and rigging position thereof, designs the lead pencil knife of two kinds of main types.First knife-blade is linearly, is called straight sword type; Another is that blade is non-linear shape, is called non-straight sword type.The rigging position of the knife-blade of straight sword type lead pencil knife make its in use blade with sharpened a pencil the lead for retractable pencil axis not in same plane, make that the pencil lead exposed part of cutting out is longer like this.

The blade of the blade of the non-straight sword type lead pencil knife of the utility model is non-directional, the machined surface of the pencil of cutting out with this lead pencil knife just is not single taper seat like this, its machined surface bus just is not a straight line, so can make the wooden part of processing be not less than limit machining angle, and can make the pencil lead exposed part of cutting out longer simultaneously.

Owing to adopted such scheme, can make the lead for retractable pencil exposed part of the Wood-bar pencil of cutting out longer, easy to use.And rotating lead pencil knife overall structure is simple.

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1 is the schematic diagram of present known rotating lead pencil knife.

Fig. 2 is first embodiment of the present utility model.

Fig. 3 is second embodiment of the present utility model.

Fig. 4 is the 3rd embodiment of the present utility model.

Among the figure: 1: knife-blade,

2: pencil lead machined surface bus,

3: the pencil lead axis,

4: pencil rod machined surface bus,

α: the pencil rod is cut out back machined surface semiapex angle,

θ: the angle of knife-blade and the projection of pencil lead axis,

φ: knife-blade knuckle.

In Fig. 1, at present known rotating lead pencil knife is to adopt the linear pattern blade, its rigging position make its in use blade 1 be in the same plane with pencil lead axis 3, thereby the machined surface 2+4 of the pencil of cutting out just is a taper seat.Because the Wood pencil bar has limited the semiapex angle of this processing conical surface, makes it not process the angle less than the limit.Thereby the lead for retractable pencil exposed part 2 of the pencil of cutting out is very short.

In Fig. 2, when straight sword type lead pencil knife of the present utility model sharpens a pencil, edge line 1 and pencil lead axis 3 be not in same plane, the angle of blade and the projection of pencil lead axis is θ, its value is for 0.1-15 °, thereby the pencil machined surface bus 2+4 that cuts out just is not straight line, but camber line, the pencil lead exposed part of so cutting out 2 is longer.This design also has an advantage, promptly add man-hour since in blade and the pencil rod wood materials direction of fiber and processing direction of rotation three's relativeness make cut more favourable.

In Fig. 3, the blade of the blade of another embodiment of the present utility model is polyline shaped, its angle is φ, and the machined surface with its pencil of cutting out is that a taper seat (lead for retractable pencil part) combines with a round table surface (rod part) like this, and its machined surface bus 2+4 is a broken line.The pencil lead exposed part of so cutting out 2 is just longer, and can make the part machined surface semiapex angle α of wooden stick be not less than limit processing angle.

In Fig. 4, the blade of the blade of another embodiment of the present utility model is arc shaped, its radian is 0.1-15 °, with the bus 2+4 of the machined surface of its pencil of cutting out be one with the corresponding camber line of knife-blade camber line, the pencil lead exposed part of so cutting out 2 is just longer.And do not make the machined surface semiapex angle α of wooden stick process the angle less than the limit.

Claims

1. rotating penknife of Wood-bar pencil, it is improved on the basis of at present common rotating lead pencil knife, by the pedestal of a band conical bore and be installed in that near the conical bore bus the blade with non-linear edge constitutes, the rigging position of its blade is that its knife-blade master basal plane has angle with the taper hole axis of placing processed pencil, and this angle is 10-15 °.

2. rotating penknife according to claim 1 is characterized in that its knife-blade is non-linearity, promptly is broken line type or arc line type.

3. rotating penknife according to claim 1 is characterized in that the rigging position of its blade makes that its blade is sharpened a pencil the lead for retractable pencil axis not in same plane with quilt when sharpening a pencil, and the angle of blade and the projection of pencil lead axis is 0.1-15 °.

4. rotating penknife according to claim 2 is characterized in that its blade master basal plane is folding face type, and folding face angle is 0.1-15 °.

5. rotating penknife according to claim 2 is characterized in that its blade master basal plane is cabochon, and its radian is 0.1-15 °.

6. rotating penknife according to claim 2 it is characterized in that its blade master basal plane is the plane, and its blade is arc line type or nonlinear type.

7. rotating penknife according to claim 1, the material that it is characterized in that its blade are structural ceramics or other nonmetallic materials.