CN103144468A

CN103144468A - Engineering drawing pencil

Info

Publication number: CN103144468A
Application number: CN2013100738726A
Authority: CN
Inventors: 梁建伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-08
Filing date: 2013-03-08
Publication date: 2013-06-12

Abstract

The invention relates to an engineering drawing pencil, which comprises a pencil holder and pencil leads, wherein a central cavity used for accommodating the pencil leads is arranged inside the pencil holder; N cavities used for accommodating N spare pencil leads are arranged on the periphery of the central cavity; a pencil point is arranged on the pencil holder; the pencil point is a big-end-down cone-shaped body; three U-shaped clamping pieces used for clamping the pencil leads are evenly distributed at the upper part of the pencil point; the pencil holder comprises an upper end, a lower end and a middle end which is connected between the upper end and the lower end; the inner diameter of the lower end is larger than that of the upper end; the cross section of the middle end is conical; the central cavity penetrates through a whole pencil body; the cavities are arranged inside the lower end; the upper end is connected with the pencil point; a rear cover is connected to the upper end; the pencil point and the pencil holder are in threaded connection; the lower end of the pencil holder and the rear cover are in threaded connection; and the N cavities are evenly distributed around the central cavity. The engineering drawing pencil is provided with a plurality of the spare pencil leads, troubles of repeated pencil sharpening are avoided, the utilization rate of the pencil leads is improved, and the pencil can be used repeatedly and has a better practical application value.

Description

The Graphing of Engineering pen

Technical field

The present invention relates to a kind of pen, particularly a kind of Graphing of Engineering pen.

Background technology

At present, the drawing personnel are the pencils that use in drawing course more, and existing pencil generally is made of penholder and lead for retractable pencil.The penholder materials mainly comprise timber and adhesive, and lead for retractable pencil raw material and auxiliary material raw material have graphite and clay.Mainly there is following problem in this pen: prepare several pencils if 1 drawing personnel complete drawing for guarantee, carry inconvenience; If the 2 offhand enough drawing pencils of drawing personnel are difficult to continue to draw when pencil is only used remaining pencil stub again; 3, for the drawing personnel, sharpening a pencil repeatedly not only bothers but also lose time; 4, traditional pencil is used last remaining pencil stub and is difficult to cut again, and also is not easy to use, and generally, such a pencil stub just can be wasted, thereby causes the waste of resource; 5, traditional drawing pencil bar majority is all wooden, and this must cut down a large amount of trees, thereby environment is caused to a certain degree destruction.

Summary of the invention

The technical problem to be solved in the present invention is the defects that how to overcome prior art, a kind of Graphing of Engineering pen is provided, and this project drawing pen has many spare lead cores, has avoided the trouble that repeatedly sharpens a pencil, the utilization rate that has improved lead for retractable pencil and can reuse.

For solving the problems of the technologies described above, this Graphing of Engineering pen comprises penholder and lead for retractable pencil, and penholder inside is provided with a center cavity that is used for placing lead for retractable pencil, is provided with for N cavity placing N spare lead core around this center cavity.

So design, center cavity is used for installing the lead for retractable pencil (same mechanical pencil) that is using, N cavity is used for placing spare lead core, can say, an engineering drawing pen is equipped with N+1 lead for retractable pencil altogether, add it and can use to greatest extent lead for retractable pencil, therefore more than the N+1 of the traditional drawing pencil drawing of the once drawing amount of this pen amount times; In addition, carry conveniently, itself have the function of the lead for retractable pencil that stores for future use due to the Graphing of Engineering pen, to prop up traditional drawing pencil convenient than once carrying N+1 for it, and it has been avoided offhand standby pencil and has caused the situation that can't continue to draw.

Be connected with nib on penholder, nib is up-small and down-big bullet, and this nib top is provided with 3 equally distributed U-shaped intermediate plates for fixing lead for retractable pencil.So design, the drawing personnel only need turn the nib of front end, can easy adjustment leak the length of lead for retractable pencil outside and clamp lead for retractable pencil, then cutting a little that lead for retractable pencil just can use (identical with the compasses using method), can improve to greatest extent like this utilization rate of lead for retractable pencil.Traditional pencil is used last remaining pencil stub and is difficult to cut again, and also is not easy to use, and generally, such a pencil stub just can be wasted, and the semi-automatic design of Graphing of Engineering pen has solved this problem.Lead for retractable pencil inserts from the center cavity of Graphing of Engineering pen, and along with the continuous consumption of lead for retractable pencil, lead for retractable pencil constantly moves forward, until it can not be clamped by intermediate plate, the more traditional remaining lead for retractable pencil of drawing pencil of lead for retractable pencil that this moment is remaining is few.Thereby accomplished taking full advantage of of resource.

Penholder comprises upper end, lower end and the intermediate ends that connects top and bottom; The internal diameter of lower end is greater than the internal diameter of upper end, and the cross section of intermediate ends is tapered, and center cavity runs through whole handwriting, and cavity is arranged on inside, lower end; Connect nib on the upper end.Installation and easy to use is convenient in so design.

Be connected with bonnet on the lower end.So design, can prevent that lead for retractable pencil from skidding off from handwriting.

Nib and penholder upper end are threaded; Penholder lower end and bonnet are threaded.So design, be connected firmly.

N cavity evenly distributes around center cavity.So design, not only attractive in appearance but also reached the store for future use purpose of lead for retractable pencil of other remaining spaces that take full advantage of in handwriting.

Graphing of Engineering pen of the present invention, simple in structure, design science, easy to use has many spare lead cores, has avoided the trouble that repeatedly sharpens a pencil, the utilization rate that has improved lead for retractable pencil, and can reuse, and has actual application value and promotional value preferably.

Description of drawings

Below in conjunction with accompanying drawing, this Graphing of Engineering pen is described further:

Fig. 1 is the semi-section structural representation of this Graphing of Engineering pen;

Fig. 2 is that the B-B of Fig. 1 is to structural representation;

Fig. 3 is that the A-A of Fig. 1 is to structural representation.

In figure: 1 is that U-shaped intermediate plate, 2 is that nib, 3 is that upper end, 4 is that intermediate ends, 5 is that cavity centered by lower end, 6,7 is that cavity, 8 is bonnet.

The specific embodiment

For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

As Figure 1-3, this Graphing of Engineering pen comprises penholder and lead for retractable pencil, it is characterized in that: penholder inside is provided with a center cavity 6 that is used for placing lead for retractable pencil, is provided with for 6 cavitys 7 placing 6 spare lead cores around this center cavity 6; Be connected with nib 2 on penholder, nib 2 is up-small and down-big bullet, and penholder comprises upper end 3, lower end 5 and the intermediate ends 4 that connects upper end 3 and lower end 5; 3 tops, upper end are provided with 3 equally distributed U-shaped intermediate plates 1 for fixing lead for retractable pencil; The internal diameter of lower end 5 is greater than the internal diameter of upper end 3, and the cross section of intermediate ends 4 is tapered, and center cavity 6 runs through whole handwriting, and cavity 7 is arranged on 5 inside, lower end; Connect nib 2 on upper end 3; Be connected with bonnet 8 on lower end 5; Nib 2 and penholder upper end 3 are threaded; Penholder lower end 5 and bonnet 8 are threaded; 6 cavitys 7 evenly distribute around center cavity 6.

The above-mentioned specific embodiment is only concrete case of the present invention; scope of patent protection of the present invention includes but not limited to product form and the style of the above-mentioned specific embodiment; any Graphing of Engineering pen that meets claims of the present invention and any person of an ordinary skill in the technical field all should fall into scope of patent protection of the present invention to its suitable variation or modification of doing.

Claims

1. Graphing of Engineering pen, this Graphing of Engineering pen, comprise penholder and lead for retractable pencil, it is characterized in that: described penholder inside is provided with a center cavity (6) that is used for placing described lead for retractable pencil, and this center cavity (6) is provided with on every side for N the cavity (7) of placing N spare lead core.

2. Graphing of Engineering pen according to claim 1, it is characterized in that: be connected with nib (2) on described penholder, described nib (2) is up-small and down-big bullet, and this nib (2) top is provided with 3 equally distributed U-shaped intermediate plates (1) for fixing lead for retractable pencil.

3. Graphing of Engineering pen according to claim 2 is characterized in that: described penholder comprises upper end (3), lower end (5) and the intermediate ends (4) that connects upper end (3) and lower end (5); The internal diameter of described lower end (5) is greater than the internal diameter of described upper end (3), and the cross section of described intermediate ends (4) is tapered, and described center cavity (6) runs through whole handwriting, and described cavity (7) is arranged on inside, described lower end (5); The upper described nib (2) that connects in described upper end (3).

4. Graphing of Engineering pen according to claim 3, is characterized in that: be connected with bonnet (8) on described lower end (5).

5. Graphing of Engineering pen according to claim 4, it is characterized in that: the upper end (3) of described nib (2) and described penholder is threaded; The lower end of described penholder (5) and described bonnet (8) are threaded.

According to claim 1 to 5 arbitrary described Graphing of Engineering pen, it is characterized in that: N cavity (7) evenly distributes around described center cavity (6).