CN2242800Y - Black-lead-sharpening device - Google Patents

Abstract

The utility model relates to a lead sharpening device which is characterized in that a pencil pilot hole (2) is arranged on a casing (1) whose inside is fixed with a sharpening tool (3) which is compose of two sheets of elastic sheet metal, one end of the sharpening tool is connected with the casing (1) through a retaining clip (5), the other end is bifurcate, and the bifurcate end plane of each sheet of sheet metal is stamped with a V-shaped gap and a protective hole (4). The utility model can be matched to use for various simple pencil sharpeners or automatic pencil sharpeners, having the advantages of simple structure, low cost, capability of single use, no lead breaking off during sharpening, rapidity, high durability, and smooth and sharpening surface with beautiful appearance.

Description

The pencil-lead topping machanism

The utility model relates to a kind of writing or drawing article, particularly a kind of pencil-lead topping machanism.

Existing pencil topping machanism is of a great variety, and using maximum is that Simple pencil digs, and one not only cuts planing tool the wooden part of pencil but also cut pencil-lead, and it is simple in structure but pen core is easily broken, wastes bigger; Another kind of comparatively advanced hand milling cutter formula pencil sharpener, because of adopting the rotary cutter cutting, its shortcoming mainly is that volume is big, complex structure, cost an arm and a leg; When in addition electronic mill pen core device was used the wheel grinding pen core, the pencil bits easily accumulated on the emery wheel, and ground effect descends with the increase of service time.

The purpose of this utility model is to overcome above-mentioned weak point and a kind of pen core simple in structure, cheap, continuous, the quick and durable pencil-lead topping machanism of cutting are provided.

The pencil-lead topping machanism is characterized in that having on the housing pencil pilot hole; be fastened with cutting tool in the housing; cutting tool is made up of two elastic sheet metals; the one end is fastening with geometrical clamp and housing; other end bifurcated, angle are β, and each sheet metal bifurcated end face punching press has V-notch; angle α=the β of V-notch also has a nib protection hole at the drift angle place of V-notch.The thickness of elastic sheet metal is the 0.3--0.6 millimeter, and length is the 10--20 millimeter, and width is the 4--8 millimeter, angle α=β=10 of V-notch °--25 °.Cutting tool can be installed in the housing and use separately, also can dig with Simple pencil to be used, and cutting tool can also be connected rotating shaft, ratio wheel and motor, and pencil-lead is cut automatically.

The accompanying drawing drawing is described as follows:

Fig. 1 is a pencil-lead topping machanism structural representation;

Fig. 2 is the cutting tool front view;

Fig. 3 is the cutting tool vertical view;

Fig. 4 is Fig. 2 A-A profile;

Fig. 5 is a self-action pencil-lead topping machanism structural representation.

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

Fig. 1 is a pencil-lead topping machanism structural representation, and a pilot hole 2 is arranged on the housing 1, and there is certain length in this hole, and is more steady when pencil rotates in the hole, can the off-axis direction, be fastened with cutting tool 3 in the housing 1.Fig. 3 is the cutting tool vertical view, and cutting tool 3 is formed by stacking by two elastic sheet metals, and thickness is 0.4 millimeter, and length is 20 millimeters, and width is 6 millimeters, and the one end is fastening with geometrical clamp 5 and housing 1, other end bifurcated, angle β=15 °.Fig. 2 is the cutting tool front view, and each sheet sheet metal bifurcated end face of cutting tool 3 strikes out V-notch, and there is the nib protection hole 4 of =3 millimeter angle α=β=15 of V-notch ° in the drift angle place punching press of V-notch.Fig. 4 is Fig. 2 A-A profile, and the cross section of cutting tool 3 can see that the blade of four shapes that meet at right angles is symmetrically distributed because pilot hole 2 is arranged, so pencil can not swing, no matter pen core forward or reverse in blade is all stressed evenly.Simultaneously have certain elasticity because of superimposed sheet metal, the β angle can change along with the axial feed size of pen core, but blade keeps certain pressure and keep cutting pen core all the time, but can pen core be fractureed because of pressure is excessive.

Cutting tool 3 also can dig with Simple pencil and be used, but the length of planing tool need adjust, and makes planing tool only cut the wooden part of pencil, and pencil-lead is then cut by cutting tool 3.

Fig. 5 is a self-action pencil-lead topping machanism structural representation, cutting tool 3 needs to link into an integrated entity with rotating shaft 6, the other end of rotating shaft connects reduction gearing 7 and motor 8, and the power switch K of motor places in the pencil pilot hole 2, when pencil inserts pilot hole, motor is connected power supply and is rotated, and output torque drives rotating shaft 6 and cutting tool 3 rotations after reduction gearing 7 is slowed down, and can cut automatically pencil-lead.

The utility model is simple in structure, cheap, can use separately, and also can be installed in various Simple pencils and dig, be used in the pencil sharpener automatically, the pen core that do not fracture during cutting, durable fast, the cutting face smooth and beautiful appearance has the wide development prospect.

Claims (4)

1. pencil-lead topping machanism; it is characterized in that housing (1) has a pencil pilot hole (2); be fastened with cutting tool (3) in the housing (1); cutting tool (3) is made up of two elastic sheet metals, and the one end is fastening by geometrical clamp (5) and housing (1), other end bifurcated; its angle is β; each sheet metal bifurcated end face punching press has V-notch, and the angle α=β of V-notch has a protection hole (4) at the drift angle place of V-notch.

2. topping machanism according to claim 1, the thickness that it is characterized in that the elastic sheet metal of cutting tool (3) is the 0.3--0.6 millimeter, and its length is the 10--20 millimeter, and width is the 4--8 millimeter, angle α=β=10 of V-notch °--25 °.

3. topping machanism according to claim 1 is characterized in that cutting tool (3) can be used with the Simple pencil plane.

4. topping machanism according to claim 1 is characterized in that cutting tool (3) also can link to each other with rotating shaft (6), and rotating shaft (6) connects reduction gearing (7) and motor (8) again.

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