CN201058544Y

CN201058544Y - Pencil lengthening bar

Info

Publication number: CN201058544Y
Application number: CNU2007201046629U
Authority: CN
Inventors: 李浩东
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-29
Filing date: 2007-05-29
Publication date: 2008-05-14
Anticipated expiration: 2017-05-29

Abstract

The utility model provides an extension rod for short pencil, belonging to an auxiliary tool for writing tools, which is made of hollow pipe rod with inner thread at the end. The extension rod can fasten the pencil firmly for convenient writing, moreover the pencil can be utilized effectively, in general cases the pencil can be used until can not be cut any more, thereby facilitating for saving resource and reducing pollution. The utility model can be widely suitable for departments where pencils are often used such as education, design and drawing.

Description

Pencil elongated bar

Technical field

The utility model relates to a kind of aid of writing appliance, is specifically related to a kind of extension bar of fixedly pencil.

Background technology

Much more especially the fixedly pencil of fixing between carbon black lead for retractable pencil and pencil shaft is the writing implement that a kind of people use always, to be used for departments such as education, design, drawing, and its consumption is very big.The unworn brand-new fixedly length of pencil is about 177 millimeters, and its pencil shaft is generally made with timber or become with paper roll.When normally using pencil, be to grip the penholder lower end, and in the middle part of the penholder or upper end load lean against on the tiger of staff with thumb and forefinger.And when pencil length with short, to such an extent as to the no penholder in the tiger of staff place can carry on a shoulder pole by the time, re-use pencil and just be difficult to normally write.Generally for the adult, be shorter in length than a half of new pencil when pencil, for the pupil, when pencil is shorter in length than three of new pencil/for the moment, above-mentioned condition just appears, this moment remaining short pencil, often will go out of use, and cause the waste of resources such as timber, paper, carbon black and the pollution of environment.Can be fully used for making short pencil, to economize on resources, people have found out the various instruments that make pencil " growth ", " a kind of penholder that utilizes pencil stub " that the Patent Office of the People's Republic of China grants patent (patent No.: 94248626.9) be exactly wherein a kind of, this patented technology be short pencil is inserted certain size the termination of pipe reaching the effect of " growth " pencil, and the pipe barrier of restriction pencil insertion depth is set at 10-20 millimeter place, distance pipe termination.The weak point of this patent is the dimensional requirement of ips tighter, if caliber is less, pencil inserts just difficulty; On the contrary, gapped between pipe and pencil if caliber is excessive, pipe just can not be fixed pencil, and pencil can be deviate from pipe, or is difficult to control pencil and writes.

Summary of the invention

Purpose of the present invention is to provide a kind of short pencil that can make to be fully utilized, and cheap extension bar, utilizes this extension bar, and short pencil is fully used, can also pencil is fixing securely, and make and write conveniently freely.

The purpose of this utility model is achieved in that at the termination of hollow pipe body of rod internal diameter, makes one section internal thread hole, makes the external diameter of the crest diameter of this internal thread hole less than pencil, and root diameter is greater than the external diameter of pencil.

The purpose of this utility model further can realize like this: before the internal thread hole of hollow pipe body of rod termination, make one section targeting port; This section internal thread hole is made as double thread; Materials such as hollow pipe body of rod available metal, plastics, lucite are made.

Use this product when short pencil, only need pencil stub is screwed in 2-3 tooth in the internal thread of this pencil elongated bar gently, extension bar just can be fixed pencil securely, so pencil can obtain utilizing effectively, generally can use pencil can't carry out again cutter when cutting till, saved resource, reduced because the environmental pollution that waste caused of resource.Because this pencil elongated bar is simple in structure, make easily, so cheap.As identical processing is all carried out at the two ends of the hollow pipe body of rod, then same pencil elongated bar can be simultaneously uses for the short pencil of two kinds of different pencil-leads, or the other end also can be loaded onto erasing rubber and uses.Screw in pencil elongated bar as the head with pencil, then this extension bar also can play the effect of pen cap protection pencil stub.

Description of drawings

Fig. 1 is a structure chart of the present utility model.

Fig. 2 and Fig. 3 are two kinds of user mode figure of the present utility model.Fig. 2 is the same pencil elongated bar two kinds of different short pencils of packing into simultaneously; Fig. 3 is the head that an end of pencil elongated bar screws in short pencil, and the other end screws in the afterbody of short pencil.

Among the figure, 1 targeting port; 2 internal thread holes; The 3 hollow pipe bodies of rod

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples, but they are not to qualification of the present utility model.

See Fig. 1, less than the aluminium-alloy pipe of pencil external diameter, make the targeting port that be about 5 millimeter in its two ends with internal diameter size, this targeting port size is a bit larger tham the pencil external diameter so that pencil when screwing in internal thread hole to the not run-off the straight of pencil elongated rod axis.Be right after the internal thread hole that is made into behind the targeting port and have double thread, when screwing in this internal thread hole with further assurance pencil not to pencil elongated rod axis run-off the straight.The about 5-10 millimeter of this internal thread hole length, the crest diameter of screw thread is less than the external diameter of pencil, and root diameter is greater than the external diameter of pencil, and this extension bar promptly completes.During use, the short pencil afterbody is screwed in extension bar 2-3 tooth by targeting port to get final product, pencil elongated bar can be to pencil shaft " mantle fiber ", make and produce the external screw thread that cooperates fully with the internal thread hole of pen extension bar on the pencil shaft, pencil shaft is promptly fixed by pencil elongated bar, and it is any loosening that the axial force when writing can not make pencil take place.Because pencil shaft makes with timber or paper, when pencil shaft is screwed in the extension bar screwed hole and leicht fallen D/A, only need to screw in gently and get final product.

Claims

1. pencil elongated bar is processed by the hollow pipe body of rod, it is characterized in that: in hollow pipe body of rod termination one internal thread hole is arranged, the crest diameter of this internal thread hole is less than the external diameter of pencil, and root diameter is greater than the external diameter of pencil.

2. pencil elongated bar according to claim 1 is characterized in that: before the internal thread hole of hollow pipe body of rod termination, a targeting port is arranged.

3. pencil elongated bar according to claim 1 and 2 is characterized in that: this section internal thread hole is a double thread.

4. pencil elongated bar according to claim 1 and 2 is characterized in that: hollow pipe rod body material available metal, plastics, lucite are made.