CN2301335Y - Pencil sharpener - Google Patents

Abstract

The utility model discloses a pencil sharpener, belonging to the improved design of a pencil sharpener. The pencil sharpener comprises a seat provided with a cone-shaped cavity for screwing pencils, and a cutting blade fixed to the seat by screws. The pencil sharpener is characterized in that the front end part of the seat, which is positioned on the small end of the cone-shaped cavity, is also provided with a grinding stone for a grinding pencil tip. When the improved pencil sharpener is used to sharpen a pencil, the screwing in depth of the pencil can be controlled, and the phenomena of lead core explosion, and pencil tip breaking are avoided; the pencil tip of the pencil is smooth and blunt after the grinding of the grinding stone, and the tip part of the pencil tip has fluent line shape without sharpened tip to scrape paper in use.

Description

Pencil-knife

The utility model belongs to a kind of improvement design of pencil-knife.

At present, when using commercially available pencil-knife to cut, since lead for retractable pencil soft, hardness is different, blade cuts lead for retractable pencil and lead for retractable pencil takes place often bursts, splits disconnected phenomenon, so that often need repeatable operation just can be whittled into pencil with required fineness degree nib, cause pencil and waste of time, the nib of cutter cutting simultaneously all is aciculiform, very easily scratch paper, form chain waste.

The utility model purpose is that a kind of improved pencil-knife will be provided, to overcome the defective of known technology pencil-knife.

The technical solution adopted in the utility model is this pencil-knife, it comprises the seat that has screw-in pencil usefulness conical cavity, by be connected blade on the seat of screw, it is characterized in that: on said seat, be positioned at conical cavity small end front end place and also be provided with and be used for the grinding stone that the grinding tip of a pencil is used.

The pencil-knife of making by technique scheme has following advantage, because of having set up grinding stone and having made blade lengths not have the blade lengths weak point of grinding stone relatively, the pencil-knife after thereby use improves can be controlled the screw-in depth of pencil when sharpening a pencil, avoid that lead for retractable pencil bursts, nib is cut disconnected phenomenon, and nib is level and smooth and blunt shape after the grinding stone polishing, nib head line style smoothness does not have sharp point, use can avoid scratching paper.

Fig. 1 is the organigram (A-A that is Fig. 2 is to cutaway view) of this pencil-knife.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is that the B-B of Fig. 2 is to cross section view.

Fig. 4 cuts open enlarged drawing for the office of grinding stone among Fig. 1.

Further describe below in conjunction with accompanying drawing.Referring to accompanying drawing, this pencil-knife includes seat (1), has conical cavity (2) structure that is used to screw in pencil on the seat (1), the blade (4) that is connected by screw (3) above the seat (1), with the pencil-knife of upper member and structure and known technology roughly the same, the utility model primary structure characteristics are to be positioned at the also bonding grinding stone (5) that is used for grinding pencil lead point that is fixed with in conical cavity (2) small end front end place on present (1), in order to guarantee the streamlined of tip of a pencil, on grinding stone (5), have awl groove (6) structure (referring to Fig. 4), wherein grinding stone (5) can select for use the commercially available prod to get final product with oilstone etc. as whetting a knife, after setting up grinding stone (5), blade lengths short (can lack 2～4 millimeters) that blade (4) length quite can not had grinding stone is not so that blade directly cuts the sharp point of pencil-lead.

Claims (3)

1, a kind of pencil-knife comprises having screwing in the seat of pencil with conical cavity, by be connected blade on the seat of screw, it is characterized in that: be positioned at conical cavity small end front end place and also be provided with and be used for the grinding stone that the grinding tip of a pencil is used on said.

2, according to the described pencil-knife of claim 1, it is characterized in that said grinding stone can bondingly be connected present on.

3,, it is characterized in that also having on the said grinding stone awl groove structure according to the described pencil-knife of claim 1.

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