CN2116593U

CN2116593U - Pencil sharpener with arc blade

Info

Publication number: CN2116593U
Application number: CN 92204209
Authority: CN
Inventors: 汪震夏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-14
Filing date: 1992-03-14
Publication date: 1992-09-23

Abstract

The utility model relates to a pencil sharpener with arc blade, which comprises mainly an arc cutter blade and a knife frame. The utility model is characterized in that a screw hole is drilled on the cutter blade, the knife frame is provided with a thread hole and a hollow cone for position cutting of the pencil, and the seating surface of the cutter blade on the knife frame is arc. When assembling, the arc cutter blade is arranged in the arc seating surface of the knife frame and then the cutter blade and the knife frame are fastened with a screw nail. Due to the adoption of arc cutter blade, the included angles between every tangent line of every point of the cutting edge and the axial cords are different, the angle is large in the positions near the nib holder, as well as the cutting output of the pencil, while the angle is small in the positions near the nib, thus the cutting output is small. Taking the included angle on the pencil lead of the nib of the pencil as r, then the included angle on the sharpened pencil lead is 2r, thus the requirement of writing is meet.

Description

Pencil sharpener with arc blade

The utility model belongs to the stationery that the what people learn to use.

The lead pencil knife that uses is a planar shaped referring to Fig. 1～Fig. 4 blade (1) please at present, and the seating surface (7) of a support blade (1) is arranged on knife rest (2), is a hollow cone (3) with what pencil location in the knife rest (2).Blade (1) is contained in the side line of the hollow cone of parallel what (3) and to axis direction some displacements is arranged.Use screw (10) that blade (1) is connected with knife rest (2) then and tighten up, to realize the function of cutting.In the hollow cone (3) that pencil is stretched into knife rest (2), with pencil phase blade (1) rotation, constantly pencil to be pushed ahead simultaneously on the one hand, this just cuts a taper nib gradually.The taper of nib and the hollow cone (3) on the knife rest (2) have identical shaped drift angle.But nib (5) is not a complete cone, and especially from the tip of the brushstyle of a writing or painting lead for retractable pencil (6) of nib (5), in cutting, blade (1) can be to the continuous again oblique cutting in the established end of the plumbous heart.Plane blade (1) its cutting output on whole blade is identical in addition, in order to make penholder (4) certain cutting output is arranged, and the cutting of lead for retractable pencil is seen relatively just excessive.Above working angles makes the end shape of lead for retractable pencil imperfect, too point very easily fracture in working angles of nib.

In order to overcome above-mentioned shortcoming, the purpose of this utility model is a kind of lead pencil knife that adopts cambered blade of design, improves the cutting quality that sharpens a pencil, and makes the pencil tip of the brushstyle of a writing or painting lead for retractable pencil of being cut be satisfactory cone, and make not easy fracture of tip of the brushstyle of a writing or painting lead for retractable pencil, so that better be fit to write use.

The utility model is made up of cambered blade (11) and knife rest (2), on knife rest (2), be shaped on for the arc seating surface (8) that cambered blade (11) is installed, be shaped on hollow cone (3) in the middle of the knife rest (2) for the pencil location, be drilled with on the knife rest (2) and use the fixedly screwed hole of cambered blade (11) of screw (10), on the position of the last corresponding screwed hole of cambered blade (11), have via hole, pass through for screw (10), during assembling cambered blade (11) subsides are placed on the arc seating surface (8) of knife rest (2), and make the side line of the hollow cone of the parallel what of cambered blade (11) (3) and some displacements are arranged to axis direction, make via hole on the cambered blade (11) aim at screwed hole on the knife rest (2), by screw (10) cambered blade (11) is connected with knife rest (2) then and tightens up.By the what blade is arc, therefore the tangent line of every bit has different angles to the angle (hereinafter to be referred as " angle ") of axis on the blade, nib (5) is maximum at the end angle near penholder (4), therefore cutting output is also bigger, nib (5) is being located near tip of the brushstyle of a writing or painting lead for retractable pencil (6), the minimum cutting output of angle is also less, can get angle is zero at the tip place of tip of the brushstyle of a writing or painting lead for retractable pencil (6), the distance that also can make blade and axis is r, and r can be that the diameter of 0.25,0.35,0.5 tip of the brushstyle of a writing or painting lead for retractable pencil (6) then is 2r.Can get 2r is 0.5,0.7 or 1.0 millimeter.Use the pencil of the utility model cutting, be gradually reduced to zero by the what cutting output, the nib of the tip of the brushstyle of a writing or painting lead for retractable pencil of therefore cutting out (6) can become complete garden shape tack and easy fracture not, gets pencil tip of the brushstyle of a writing or painting lead for retractable pencil (6) the diameter difference that required r value then cuts out and more helps writing use.Adopting the arc seating surface (8) on the knife rest (2) of cambered blade (11) in addition can single injection-molded be arc, also the knife rest (2) with flat shape face seating surface (7) can be processed into arc, promptly add a bead (9) and make the curved shape of planar shaped seating surface (7) at the last end of seating surface (7) near tip of the brushstyle of a writing or painting lead for retractable pencil (6).It is to utilize the pressure of screw (10) when assembling plane blade (1) to be pressed to become arc that knife rest (2) with arc seating surface can use cambered blade (11) also can use blade (1) to use blade (1).

The utility model has the advantages that simple in structure, assembling easily, easy to use, with low cost, the cutting quality that has improved pencil helps people to use pencil to write.

The utility model has following accompanying drawing:

Fig. 1 lead pencil knife structural representation.

Fig. 2 lead pencil knife generalized section.

The schematic diagram of Fig. 3 plane blade cutting pencil process.

The pencil shape figure that Fig. 4 plane blade is cut out.

The schematic diagram of Fig. 5 cambered blade cutting pencil process.

The pencil shape figure that Fig. 6 cambered blade is cut out.

Fig. 7 adopts cambered blade lead pencil knife profile.

The another kind of lead pencil knife embodiment profile that uses cambered blade of Fig. 8.

Number in the figure is as follows:

1. blade 2. knife rests 3. hollow cones

4. penholder 5. written 6. tip of the brushstyle of a writing or painting lead for retractable pencils

7. seating surface 8. arc seating surfaces 9. flanges

10. screw 11. cambered blades

The rotation direction of pen when the rotation arrow is represented to sharpen a pencil among Fig. 3 and Fig. 5, straight shape arrow is represented the direction of propulsion of pencil.

Implementation process of the present utility model is: at first manufacture as shown in Figure 5 a cambered blade (11), on cambered blade (11), have the via hole that passes through for screw (10), manufacture a knife rest (2) with arc seating surface (8) of installation cambered blade (11) then, be shaped on hollow cone (3) on the knife rest (2), also be shaped on the screwed hole that is connected with blade for knife rest, during assembling cambered blade is inserted on the arc seating surface (8), use screw (10) that blade and knife rest are tightened up.Another embodiment adds a bead (9) at the planar shaped seating surface (7) of knife rest (2) by of the plumbous heart of the tip of the brushstyle of a writing or painting, make the planar shaped seating surface become arc, have the knife rest of arc seating surface and on planar shaped seating surface (7), added the knife rest of flange (9), can use cambered blade (11), also can use planar shaped blade (1), can blade (1) be pressed by the pressure of screw (10) when using blade (1) to become arc.

Claims

1, a kind of lead pencil knife that adopts cambered blade; It is characterized in that: this graver is made up of cambered blade (11) and knife rest (2); On knife rest (2), be shaped on for the arc seating surface (8) that cambered blade (11) is installed, be shaped on hollow cone (3) in the middle of the knife rest (2) for the pencil location, be drilled with on the knife rest (2) and use the fixedly screwed hole of cambered blade (11) of screw (10), on cambered blade (11), have the via hole that passes through for screw (10), during assembling cambered blade (11) is placed on the arc seating surface (8) of knife rest (2), make the side line of the hollow cone of the parallel what of cambered blade (11) (3) and displacement is arranged to axis direction, make via hole on the cambered blade (11) aim at screwed hole on the knife rest (2), by screw (10) cambered blade (11) is connected with knife rest (2) then and tightens up.

2, lead pencil knife according to claim 1; It is characterized in that: the every bit tangent line is to the angle angle difference of axis on the blade, and near the part of tip of the brushstyle of a writing or painting lead for retractable pencil (6), getting angle is r, r=0.25 or 0.35 or 0.5 millimeter.

3, according to claim 1 or 2 described lead pencil knifes; It is characterized in that: have the knife rest (2) of arc seating surface, can injection molded, also planar shaped seating surface (7) can be added a bead (9) at the end near tip of the brushstyle of a writing or painting lead for retractable pencil (6) and make the planar shaped seating surface become arc.