CN2474351Y - Pencil sharpener - Google Patents

Abstract

A pencil-knife comprises a knife body (1) provided with a penknife groove, and a plane iron (2) arranged on the knife body (1). A straight cutting edge is connected with a declivous cutting edge which is provided at one end of the plane iron (2), thereby forming a cutting edge of the plane iron (2). Compared with the existing technology, when the utility model is used for sharpening pencil, a front end of the sharpened pencil is an arc-shape, which does not cut paper and hurt people and can be written directly, further, the taper of writing-core portion of the sharpened pencil is less than the wooden portion, the writing stroke is more thicker and slower when writing-core is abraded, which can relatively extend the cycle of pencil sharpening.

Description

Pencil-knife

The utility model relates to cultural tools, especially a kind of instrument that is used to cut pencil.

Existing pencil-knife is that the side of cutting a groove of adopting the planing tool with straight cutting edge to be installed on the plane body constitutes.This pencil-knife is because the cutting edge of planing tool is straight, and the tapered tip of cutting a groove of digging on the body is arranged on the cutting edge of planing tool, and its pen core termination of the pencil that it is cut out is conical structure, and its top is very sharp-pointed.This sharp-pointed pen core is easy to scratch when bringing into use writes paper, also injures the person easily, especially is not suitable for children and uses.During use, often need its sharp-pointed partly grinding off is again used.In addition, the pen core tapering of its written portion of pencil that the pencil of this structure is planed out is identical with the tapering of the wooden part of cutting out, and the wearing and tearing of the pen core of written portion cause stroke thick excessively soon, needs to dig again.Therefore, the pencil that this pencil is planed out uses inconvenience, and is also dangerous.

The purpose of this utility model provides a kind of pencil-knife of cutting out pencil easy to use, safe.

For achieving the above object, the scheme that the utility model adopts is: it includes and wherein is provided with the plane body of cutting a groove and is contained in the planing tool that digs on the body, and the cutting edge of its planing tool is formed by connecting by straight cutting edge and the declivous cutting edge that is located at planing tool one end.

The straight cutting edge of above-mentioned planing tool and the angle α between the declivous cutting edge can be 1-45 °; The length L of the declivous cutting edge of above-mentioned planing tool can be the 1-9 millimeter; Above-mentioned plane body preferably is provided with pit on its top of cutting a groove.

An above-mentioned groove of cutting is meant the space that is used for inserting therein pencil in digging body, pencil is play the guiding role; Described top of cutting a groove is meant the other end that inserts mouth with respect to pencil.

Owing to adopted such scheme, the utility model compared with prior art has following beneficial effect:

1, because the cutting edge of planing tool is formed by connecting by straight cutting edge and the declivous cutting edge that is located at planing tool one end, and therefore, the tapering that the tapering of its pen core section of the pencil of being cut out is more wooden section is little, the pen core stroke of writing when wearing and tearing increases slightly slowlyer, can prolong the cycle that sharpens a pencil relatively.

2, cut the top of a groove and be provided with pit and can make the front end of pencil pen core grind non-sharp shape such as circular-arc digging body, the pencil that this pencil is planed out is not drawn paper and is not hurted sb.'s feelings, can be directly, write swimmingly, have safe in utilization, advantage easily

The utility model is described in further detail below in conjunction with the accompanying drawing example:

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the planing tool schematic diagram of the utility model embodiment.

Fig. 3 is the shape schematic diagram that the utility model is cut out pencil.

In Fig. 1, the example shown in Figure 2, the utility model includes and wherein is provided with the plane body 1 of cutting a groove and is contained in the planing tool 3 that digs on the body 1 by screw 3, the cutting edge of planing tool 2 is formed by connecting by straight cutting edge and the declivous cutting edge that is located at planing tool one end, angle α between its straight cutting edge and the declivous cutting edge is 6.5 °, tiltedly the length L of sword is the 1-9 millimeter, digs body 1 and is provided with pit on its top of cutting a groove.

Shown in Figure 3, the utility model is cut out the kerf of pencil and is made up of two sections cones, and the surface of wherein bigger cone segments is that the straight cutting edge by above-mentioned planing tool cuts out; The surface of less cone segments is that the declivous cutting edge by above-mentioned planing tool cuts out; The front end of pencil-lead is an arc structure, and it is ground at the pit that its top of cutting a groove is provided with by above-mentioned plane body.

Claims (4)

1, a kind of pencil-knife, it includes and wherein is provided with the plane body (1) of cutting a groove and is contained in the planing tool (2) that digs on the body (1), it is characterized in that: the cutting edge of described planing tool (2) is formed by connecting by straight cutting edge and the declivous cutting edge that is located at planing tool (2) one ends.

2, pencil-knife according to claim 1 is characterized in that: the straight cutting edge of described planing tool (2) and the angle α between the declivous cutting edge are 1-45 °.

3, pencil-knife according to claim 1 and 2 is characterized in that: the length L of the declivous cutting edge of described planing tool (2) is the 1-9 millimeter.

4, pencil-knife according to claim 3 is characterized in that: described plane body (1) is provided with pit on its top of cutting a groove.

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