CN2234869Y - Double-hole pencil sharpener - Google Patents

Abstract

The utility model relates to a double-hole pencil sharpener which is composed of a sharpener frame, sharpener blades, etc. The utility model is characterized in that two round contignation-shaped holes are arranged on the sharpener frame whose upper surface and a tangent plane corresponding to the inner faces of two holes are respectively fixed with two sharpener blades which respectively keep interstices with two holes, wherein, the terminal diameter of one hole is not smaller than a lead diameter, and the terminal diameter of the other hole is smaller than the lead diameter. The wood part and the lead part of a pencil are sharpened in two steps, and the lead can not break off during sharpening the pencil.

Description

The diplopore pencil sharpener

The utility model relates to a kind of assistant product of writing or draw, and especially relates to a kind of sharpening device of pencil.

The present pencil sharpener that uses, various in style, shape is ever-changing, but they have a common shortcoming, and that is exactly that they are the single hole structure, and fixed apertures is constant, cause in cutting pencil essence part and cut its pen core, cut at volume that pen core is fractureed easily in the process.

The purpose of this utility model is at weak point of the prior art, provides a kind of volume to cut conveniently and the diplopore pencil sharpener that pen core can not be fractureed.

The purpose of this utility model realizes in the following way: change the single hole single blade structure of prior art into diplopore double blade structure, promptly on knife rest, be respectively arranged with two and be the hole of truncated cone-shaped, on the corresponding tangent plane of inner surface in the upper surface of described knife rest and described two holes, be fixed with two blades respectively, and between blade and hole, leave the gap, the aperture of the end in one of them hole is not less than the diameter of pen core, and the aperture of the end in another hole is then less than the diameter of pen core.

Because the utility model has adopted diplopore double blade structure, the diameter that is not less than pen core because of the aperture of the end in one of them hole is specialized in the wooden of cutting pencil, and the pen core of cutting pencil is specialized in the aperture of another Kong Yinqi end less than the diameter of pen core, with the wooden part and the cutting in two steps of pen core part of pencil, remarkable advantages such as pen core do not fracture when having the cutting pencil.

Figure one is a structural representation of the present utility model

Figure two is a front view of the present utility model

Figure three is a vertical view of the present utility model

Figure four is that A-O of the present utility model-A is to cut-away view

Figure five is that B-B of the present utility model is to cut-away view

Now in conjunction with the accompanying drawings, describe a specific embodiment of the present utility model in detail:

Wear hole (6), (7) of two truncated cone-shaped at knife rest (1), the diameter of the end (8) of its mesopore (6) is equal to or slightly greater than the diameter of pen core, and the diameter of the end (9) of hole (7) is less than the diameter of pen core, with about 0.6～1mm for well.The inner surface of (6), (7) is provided with a skewed slot (10), (11) respectively in the hole, fix its blade and become one to be not more than blade (4), (2) at 10 ° of angles with the center line of hole (6), (7) respectively with on the tangent position in hole (6), (7) at the upper surface of described knife rest (1), and between the tangent plane of described blade (4), (2) and hole (6), (7), stay a gap (3), (5) respectively.

In use, earlier pencil is put into hole (6) and rotation pencil, blade this moment (4) cutting pencil is wooden, wood chip is (3) discharge from the gap, pencil-lead is exposed gradually, because the diameter of the end (8) in hole (6) is not less than the diameter of pencil-lead, thus blade (4) only to cut pencil wooden and do not cut pen core.Behind certain-length, pencil is extracted out from hole (6) by exposed when pen core, put into hole (7), and rotation pencil slowly, because the diameter of the end (9) in hole (7) is less than the diameter of pencil-lead, so the time blade (2) cutting pencil-lead, scrap is discharged from hole (5).

Claims (3)

1. diplopore pencil sharpener, form by knife rest (1), blade etc., it is characterized in that on described knife rest (1), being respectively arranged with hole (6), (7) of truncated cone-shaped, on the upper surface of described knife rest (1) and described hole (6), the corresponding tangent plane of (7) inner surface, be fixed with blade (4), (2) respectively, leave gap (3), (5) respectively between described blade (4), (2) and described hole (6), (7), the diameter of the end (8) in described hole (6) is not less than the diameter of pencil-lead, and the diameter of the end (9) of hole (7) is less than the diameter of pencil-lead.

2. diplopore pencil sharpener as claimed in claim 1 is characterized in that described blade (4) on the knife rest (1), (2) be fixed in constitute one with the center of hole (6), (7) respectively and are not more than 10 ° acute angle theta.

3. diplopore pencil sharpener as claimed in claim 1 or 2 is characterized in that the inner surface in described hole (6), (7) is respectively arranged with groove (10), (11).

Images