CN202088751U

CN202088751U - Rotary and telescopic eraser

Info

Publication number: CN202088751U
Application number: CN2011200079528U
Authority: CN
Inventors: 张磊; 张牧原
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-12
Filing date: 2011-01-12
Publication date: 2011-12-28
Anticipated expiration: 2021-01-12

Abstract

The utility model discloses a rotary and telescopic eraser which is mainly designed for overcoming the defects in a conventional eraser. The rotary and telescopic eraser comprises an eraser, wherein the eraser is arranged in a back-out device used for controlling the lifting of the eraser. After the adoption of the structure, a small part of eraser can be spun out by a user during the use, and the eraser is effectively prevented from fracture during the use.

Description

The rotary extension erasing rubber

Technical field

The utility model relates to a kind of study article, relates in particular to a kind of rotary extension erasing rubber.

Background technology

At present, the erasing rubber outside that people use without any protection, be easy in the use rupture.

The utility model content

At the problems referred to above, rotary extension erasing rubber described in the utility model comprises erasing rubber, and described erasing rubber is arranged on a back-out device that is used for controlling the erasing rubber lifting.

Further, described back-out device comprises: erasing rubber lifting pedestal, and the knob that is threaded with described erasing rubber lifting pedestal.

Further, described rotary extension erasing rubber comprises that also one is arranged on the urceolus in the described back-out device outside.

Further, described outer tube inner wall is provided with at least one lifting sliding rail or track, described erasing rubber lifting pedestal arranged outside have with described outer tube inner wall on lifting sliding rail or corresponding track of track or slide rail.

Further, the cross section of described urceolus is triangle, quadrangle or hexagon.

Further, be provided with a protective cover at the top of described urceolus.

Further, be provided with pencil sharpener or casper in the bottom of described protective cover or described back-out device.

The beneficial effects of the utility model are: the result is simple, and is easy to use, and can effectively prevent the erasing rubber fracture.

Description of drawings

Fig. 1 is an example structure schematic diagram of rotary extension erasing rubber described in the utility model;

Fig. 2 stretches out view for erasing rubber among the embodiment of rotary extension erasing rubber described in the utility model;

Fig. 3 is another example structure schematic diagram of rotary extension erasing rubber described in the utility model;

Fig. 4 stretches out view for erasing rubber among another embodiment of rotary extension erasing rubber described in the utility model;

Fig. 5 is covered with the structural representation of protective cover for the urceolus top of rotary extension erasing rubber described in the utility model;

Fig. 6 is leg-of-mutton structural representation for the urceolus cross section of rotary extension erasing rubber described in the utility model;

Fig. 7 is tetragonal structural representation for the urceolus cross section of rotary extension erasing rubber described in the utility model;

Fig. 8 is hexagonal structural representation for the urceolus cross section of rotary extension erasing rubber described in the utility model.

The specific embodiment

Below in conjunction with Figure of description the specific embodiment of the present utility model is done detailed description.

As shown in Figure 1, rotary extension erasing rubber described in the utility model comprises erasing rubber 1, and described erasing rubber is arranged on a back-out device 2 that is used for controlling the erasing rubber lifting.

Preferably, screwing out device described in the present embodiment comprises: erasing rubber lifting pedestal 21, and the knob 22 that is threaded with described erasing rubber lifting pedestal.

Further, described rotary extension erasing rubber comprises that also one is arranged on the urceolus 3 in the described back-out device outside, to play the effect of described back-out device 2 of protection and described erasing rubber 1.

Preferably, for making the lifting stably under the effect of described knob 22 of described erasing rubber lifting pedestal, described urceolus 3 inwalls are provided with at least one lifting sliding rail 51 or track 52, described erasing rubber lifting pedestal 21 arranged outside have with described urceolus 3 inwalls on lifting sliding rail 51 or track 52 corresponding tracks 62 or slide rail 61 (shown in Fig. 6,7 and 8).

Preferably, as Fig. 6, Fig. 7 and shown in Figure 8 rolls on the table for preventing described rotary extension erasing rubber, and the cross section of described urceolus 2 is triangle, quadrangle or hexagon.

Preferably, as shown in Figure 5, be provided with a protective cover 4 at the top of described urceolus; when not using the described rotary extension erasing rubber of present embodiment; erasing rubber can be screwed in the urceolus, cover is gone up this protective cover 4 again, guarantees that erasing rubber in the urceolus is not subjected to outside contamination and dirty.

Preferably, for improving the functional and attractive in appearance of the described rotary extension erasing rubber of present embodiment, be provided with pencil sharpener or casper in the bottom of described protective cover or described back-out device.

The utility model only needs the turn knob in use, and the erasing rubber that then is in the urceolus screws out, and uses up back turn in the other direction knob, and the erasing rubber of back-out then enters in the urceolus.The user in use can only screw out the sub-fraction of erasing rubber like this, has avoided erasing rubber in use to rupture, and can also keep the cleaning of erasing rubber in addition.

More than; it only is preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.

Claims

1. a rotary extension erasing rubber comprises erasing rubber, it is characterized in that, described erasing rubber is arranged on a back-out device that is used for controlling the erasing rubber lifting.

2. according to the described rotary extension erasing rubber of claim 1, it is characterized in that described back-out device comprises: erasing rubber lifting pedestal, and the knob that is threaded with described erasing rubber lifting pedestal.

3. according to the described rotary extension erasing rubber of claim 1, it is characterized in that described rotary extension erasing rubber comprises that also one is arranged on the urceolus in the described back-out device outside.

4. according to the described rotary extension erasing rubber of claim 3, it is characterized in that, described outer tube inner wall is provided with at least one lifting sliding rail or track, described erasing rubber lifting pedestal arranged outside have with described outer tube inner wall on lifting sliding rail or corresponding track of track or slide rail.

5. according to the described rotary extension erasing rubber of claim 3, it is characterized in that the cross section of described urceolus is triangle, quadrangle or hexagon.

6. according to the described rotary extension erasing rubber of claim 3, it is characterized in that, be provided with a protective cover at the top of described urceolus.

7. according to the described rotary extension erasing rubber of claim 6, it is characterized in that, be provided with pencil sharpener or casper in the bottom of described protective cover or described back-out device.