CN2263005Y

CN2263005Y - Pencil lengthening sleeve

Info

Publication number: CN2263005Y
Application number: CN 96213489
Authority: CN
Inventors: 于滨
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-02
Filing date: 1996-07-02
Publication date: 1997-09-24
Anticipated expiration: 2006-07-02

Abstract

The utility model relates to a hard sleeve capable of lengthening a pencil. One end of a hard sleeve is processed into an internal thread port, and meanwhile, one end of a pencil marked with hardness is also processed into an external thread port engaged with the internal thread port of the sleeve; the length of the thread ports of the hard sleeve and the pencil are both about 1 centimeter. When the pencil is used until the pencil has short length, the hard sleeve capable of lengthening a pencil is screwed on one end of the outer thread port of the pencil to be fixed so as to achieve the goal that the utility model is convenient for people to normally hold a pencil head and the pencil can be saved and utilized.

Description

Pencil prolongs sleeve

The utility model relates to a kind of extension fixture of the pencil that can extend, and especially prolongs the sleeve that " pencil stub " is convenient to hold a pen and made full use of " pencil stub ".

At present, commercially available pencil does not all have extension fixture, is unfavorable for that the user installs extension fixture voluntarily additional yet.Constantly prune in the process of use pencil, shorter and shorter, if with just abandoning to the length that can normally hold just, every pencil approximately will waste 1/3, the annual pencil that uses in the whole nation is hundreds of millions of, and raw material, the energy, the manpower and materials of waste are all very huge because can not utilize " pencil stub ".On the other hand, pencil influences writing speed and quality with to being not easy to assurance more in short-term, especially influences primary grades pupil pen holding posture, restricts the raising of its writing level.

The purpose of this utility model provides a kind of sleeve that prolongs pencil, the length utilization rate that it can not only make every pencil is brought up to more than 80% from present 60～70%, thereby save material widely and energy consumption, and be convenient to the student and form the good pen holding posture of writing, be beneficial to the raising of its writing level.

The technical solution of the utility model is: make a shape such as pen tube, the hard sleeve (plastics or metal make) slightly thicker than pencil, be about 10 centimetres, one end internal orifice car becomes internal sealing plug (as nut type), and silk mouthful is about 1 centimetre; The other end can be made into cecum, but also opening or connect an erasing rubber, the external sealing plug (as screw shaped) that an end car that again pencil is indicated hardness becomes the internal sealing plug with aforementioned sleeve to match, silk mouthful is about 1 centimetre.When pencil with to lack (about 6～8 centimetres) inconvenience when holding, sleeve is threaded onto on the pencil to the purpose that firmly can reach the prolongation pencil.

Owing to adopt such scheme, can when saving the use pencil, be convenient to normally hold pencil, be beneficial to the raising of writing level.Only needing silk mouth in the reprocessing on the existing pencil, the cover upper bush gets final product.And a sleeve and some pencil couplings can be used repeatedly, and are simple in structure, with low cost, easy to use.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the pencil drawing that an end car becomes external sealing plug in the utility model.

Fig. 2 is the hard sleeve figure that an end car becomes internal sealing plug.

Fig. 3 is the structure chart that prolongation sleeve (5) and the end in the utility model has the pencil (1) of external sealing plug to be connected.

Fig. 4 is the I-I cutaway view of Fig. 2.

Among the figure 1, pencil; 2, external sealing plug; 3, tip of a pencil; 4, internal sealing plug; 5, prolong sleeve; 6, interior external sealing plug is connected identical mutually.

The sleeve of Fig. 2 can be made with plastics or metal, sleeve is about 10 centimetres, one end is made internal sealing plug (4), again an end of the pencil (1) of Fig. 1 also is processed into the external sealing plug (2) that the internal sealing plug with sleeve matches, when pencil is used to more in short-term, to prolong sleeve (5) and be threaded onto pencil (1) a silk mouthful end is arranged is structure shown in Figure 3, just reach the purpose of this utility model.

Claims

1, a kind of prolongation sleeve of the pencil that can extend is connected by an end of hard sleeve and pencil, it is characterized in that: long 10 centimetres hard sleeve one end car becomes internal sealing plug; The end car that pencil indicates hardness becomes external sealing plug; Sleeve is threaded onto on the pencil silk mouth to firm.

2, prolongation sleeve according to claim 1 is characterized in that: sleeve is the pipe shape, make by metal or rigid plastics, and long 1 centimetre of the internal sealing plug of one end, the other end can seal into cecum, and perhaps opening perhaps connects an erasing rubber.

3, prolongation sleeve according to claim 1 is characterized in that: long 1 centimetre of external sealing plug on the pencil, its screw thread is consistent with the internal sealing plug screw thread of sleeve, can coincide.