CN2179263Y

CN2179263Y - Sharpening-free mobile pencil with coarse lead

Info

Publication number: CN2179263Y
Application number: CN 93247391
Authority: CN
Inventors: 王志军
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-25
Filing date: 1993-11-25
Publication date: 1994-10-12
Anticipated expiration: 2003-11-25

Abstract

The utility model relates to a propelling pencil with a thick lead core without being sharpened, which is characterized in that the round cross section of a pencil core in the existing propelling pencil changes into the triangular cross section of the pencil core. The pencil core of the utility model is thick, the pencil is used for writing by an edge angle which is formed by the end of the pencil core, and a thick stroke or a thin stroke is in a required range by rotating a pencil holder frequently. Compared with the existing propelling pencil, the utility model not only solves the problems that the pencil core is thin and is easy to be broken, but also solves the problems that the pencil core is thick and a pencil nib is grinded and cut frequently. The utility model improves the efficiency of writing and drawing, and reduces a waste of many pencil cores.

Description

Sharpening-free mobile pencil with coarse lead

The utility model is the propelling pencil of exempting to cut about a kind of thick core.

Existing propelling pencil has thick core and two types in thin core, and the cross section of its lead for retractable pencil is circle.When thin propelling pencil is write, do not need the grinding nib, but lead for retractable pencil fractures very easily, and thick propelling pencil its lead for retractable pencil frangibility not when writing, but need frequent grinding nib.

The purpose of this utility model is a kind of thick core of design propelling pencil of exempting to cut, and makes when writing neither frangibility of lead for retractable pencil, does not need grinding again.

This purpose is achieved in that at one by penholder, the taper sheath, in the existing propelling pencil that adjusting microinching mechanism and lead for retractable pencil etc. are formed, is leg-of-mutton lead for retractable pencil with cross section for circular lead for retractable pencil changes cross section into, three vertical sides of lead for retractable pencil and its end face intersect will form a plurality of corner angle, when using its a certain corner angle to write, can obtain thinner stroke, after these corner angle are ground to a certain degree, the stroke chap, rotatable again penholder selects for use another corner angle to write, existing corner angle are write to be ground off, its face that newly grinds with intersect with face or with vertical side of lead for retractable pencil, can form a plurality of new corner angle again, for selecting for use when writing, constantly write, new corner angle constantly form, and always having corner angle to exist can be for selecting for use, so reached the thin purpose that does not need the grinding nib again of writing stroke.Will form a certain size a plurality of corner angle in the end of lead for retractable pencil, lead for retractable pencil just can be made slightlyer, has then just solved the problem that lead for retractable pencil fractures easily.

The utility model technical scheme preferably is that the cross section of lead for retractable pencil is an equilateral triangle, and the corner angle that form in the lead for retractable pencil end are evenly distributed like this, each corner angle writing effect basically identical, and simultaneously, the bending strength of respectively writing the orientation lead for retractable pencil is also basic identical.

Above-mentioned propelling pencil, its lead for retractable pencil is thicker, and in the mode of frequent rotating penholder, the thickness that makes stroke and is used a rib of the triangle lead for retractable pencil end face uniform thick lines that can draw within required scope, use its a certain drift angle can mark uniform hachure.Compare with existing propelling pencil, not only solved because of lead for retractable pencil is thinner, the problem that very easily fractures when writing, and also it is thicker to have solved lead for retractable pencil, often needs the problem of grinding nib, thus improved the efficient of writing, charting greatly, reduced the waste of a large amount of lead for retractable pencils.

The utility model has following accompanying drawing:

Fig. 1 exempts to cut the cutaway view of propelling pencil locking state for thick core.1-lead for retractable pencil wherein, 2-taper sheath, 3-lock sleeve, 4-elastic force chuck, 5-spring, 6-cover for seat, 7-penholder, 8-adjusting microinching bar, 9-adjusting microinching pole cap.

Fig. 2 is the profile of lead for retractable pencil ［ 1 ］, lock sleeve ［ 3 ］, elastic force chuck ［ 4 ］.

Fig. 3 is the cutaway view of lead for retractable pencil ［ 1 ］.

Fig. 4, Fig. 5 are the lead for retractable pencil cutaway view of other two embodiment.

There is shown three kinds of embodiment of this propelling pencil.

Fig. 1, Fig. 2, Fig. 3 are a kind of embodiment.Fig. 1, Fig. 2 show the basic structure of this propelling pencil, and the cross section of its lead for retractable pencil ［ 1 ］ is an equilateral triangle, and the retained part of elastic force chuck ［ 4 ］ is equally distributed three lobes.The cross-sectional profile of penholder among Fig. 3 ［ 7 ］ is a regular hexagon, and the summit of the equilateral triangle cross section of this orthohexagonal summit and its lead for retractable pencil ［ 1 ］ differs 30 ° angle on phase place.Like this, according to the natural manner that holds a pen, can select the corner angle of lead for retractable pencil to write rapidly and accurately.

Fig. 4, Fig. 5 form two embodiment in addition with Fig. 1 and Fig. 2 respectively, and the cross-sectional profile of its penholder ［ 7 ］ is respectively circle and equilateral triangle among Fig. 4, Fig. 5.The summit of the equilateral triangle cross section of the summit of the equilateral triangle cross section of its penholder ［ 7 ］ and lead for retractable pencil ［ 1 ］ differs 60 ° angle among Fig. 5 on phase place, is equally to be convenient to select rapidly and accurately the corner angle of lead for retractable pencil to write.

Claims

1, a kind of thick core exempts to cut propelling pencil, is made up of penholder, taper sheath, adjusting microinching mechanism and lead for retractable pencil, and the cross section that it is characterized in that lead for retractable pencil is a triangle.

2, exempt to cut propelling pencil according to the described thick core of claim 1, the cross section that it is characterized in that lead for retractable pencil is an equilateral triangle.

3, exempt to cut propelling pencil according to the described thick core of claim 2, it is characterized in that the penholder cross-sectional profile is a regular hexagon, the summit of the equilateral triangle cross section of this orthohexagonal summit and lead for retractable pencil differs 30 ° angle on phase place.

4, exempt to cut propelling pencil according to the described thick core of claim 2, it is characterized in that the penholder cross-sectional profile is an equilateral triangle, the summit of the equilateral triangle cross section of the summit of this equilateral triangle and lead for retractable pencil differs 60 ° angle on phase place.