CN2723223Y - Pencil sharpener - Google Patents

Abstract

The utility model discloses a major structure of a new style pencil sharpener, comprising a guiding cylindrical hole part, a conical bore guiding forming part and a knife blade part. Compared with the present pencil sharpener, the utility model is extendedly provided with the cylindrical hole guiding part and the cylindrical hole is connected with the conical hole; wherein, the center is provided with a favorable concentricity. The knife blades arranged around the conical hole is one to three slices, which is used for sharpening a pencil. The conical angle of the conical hole is similar to the present between 16-30 degrees and the guiding cylindrical hole makes the pencil and the hole of the pencil sharpener easy to align but not easy to break a cartridge in sharpening when the pencil is inserted. When the knife blades has three slices, the sharpening effect is better and the utility model is an ideal and practical pencil sharpener due to the advantages of low cost, compactness, light weight and the cartridge which is not easy to be broken.

Description

A kind of penknife

Technical field

The utility model relates to the penknife of common pencil, is specifically related to the structure at its cutter body position.

Background technology

At present, the penknife of common pencil mainly contains two kinds of agent structures: a kind of is that cheap conical bore, planar square blade unit is the penknife of cutter body, is referred to as a type penknife; Another kind is that the more expensive conical bore of price, mechanism, the cylindrical milling cutter that clamps pencil are that blade unit is the penknife of cutter body, and the planetary rotation of cylindrical milling cutter blade adds the mode of revolution and cuts pencil, is referred to as b type penknife.Preceding a kind of, cheap, volume is little, and is in light weight, easily broken pen core during use; The back is a kind of, and price is expensive, and volume is big, and weight is heavier, not easily broken pen core during use.

Summary of the invention

The purpose of this utility model is exactly a kind of penknife agent structure that provides at above-mentioned deficiency: it is cheap, and volume is little, and is in light weight, not easily broken pen core during use.Realized the advantage of two kinds of penknives above-mentioned.

The utility model is to adopt following scheme to realize above-mentioned purpose: the penknife that this is novel, its agent structure comprises the cylindrical hole part of conical bore guiding shaped portion, blade section, guiding, and the cylindrical hole part of this guiding is concentric with conical bore guiding shaped portion.As the further improvement of such scheme, blade of the present utility model can adopt two to three, and blade is installed on the periphery of conical bore, for the ease of chip removal, and corresponding two～three place's open slots that are provided with of the hole wall of conical bore.

Adopt the following characteristics that the utlity model has of said structure:

Compare with a type penknife, set up the cylindrical hole targeting part.Cylindrical hole is connected with conical bore, and there is good concentricity at its center.Blade is one to three, is installed on the periphery of conical bore, and for the edge of a knife of blade partly stretches into conical bore inner cutting pencil and chip removal, the hole wall of conical bore has open slot.The coning angle of conical bore is with similar at present, between 16～30 degree.The cylindrical hole of guiding makes that pencil and penknife hole were easy to align, not easily broken pen core during cutting when pencil inserted.When blade is two～three, stressed even, cutting effect will be better.

Description of drawings

Fig. 1 is of the present utility model one routine structural representation;

Fig. 2 is the plan structure schematic diagram of Fig. 1;

Fig. 3 is the A-A broken section structural representation of Fig. 1.

Fig. 4 is another routine structural representation of the present utility model;

Fig. 5 is the plan structure schematic diagram of Fig. 4;

Fig. 6 is A '-A ' sectional structure schematic diagram of Fig. 4.

The specific embodiment

Fig. 1, Fig. 2, shown in Figure 3, cylindrical hole of the present utility model (1) is connected with conical bore (2), and a slice blade (3) is installed on the periphery of conical bore, and the edge of a knife of blade partly stretches into conical bore inside, has adopted screw (4) to connect.The coning angle a of conical bore is with similar at present, between 16～30 degree.For the edge of a knife of blade partly stretches into conical bore inner cutting pencil and chip removal, the hole wall of conical bore has open slot.

Fig. 4, Fig. 5, shown in Figure 6, cylindrical hole of the present utility model (1 ') is connected with conical bore (2 '), and the even dutiful cloth of two blades (3 ') is installed on the periphery of conical bore, and the edge of a knife of blade partly stretches into conical bore inside, has adopted screw (4 ') to connect.The coning angle a ' of conical bore is with similar at present, between 16～30 degree.For the edge of a knife of blade partly stretches into conical bore inner cutting pencil and chip removal, the hole wall of conical bore has two place's open slots.

Claims (2)

1. penknife, its agent structure comprise conical bore guiding shaped portion, blade section, it is characterized in that its agent structure also includes the cylindrical hole part of guiding, and the cylindrical hole part and the conical bore guiding shaped portion of this guiding are concentric.

2, a kind of novel penknife according to claim 1 is characterized in that, described blade is two to three, and blade is installed on the periphery of conical bore, and the hole wall of conical bore has corresponding two～three place's open slots.

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