CN204726085U - Chalk sleeve - Google Patents

Abstract

The utility model proposes a kind of chalk sleeve, comprise chalk sleeve body, the shape of described chalk sleeve body be with the shape of chalk relative to truncated cone-shaped; Described chalk sleeve body is provided with longitudinal opening; Also be provided with push-pull device at fixed in described chalk sleeve body, described push-pull device at fixed comprises the resettlement section of the larger end of the diameter of the push-and-pull portion outside described longitudinal opening of protrusion and collecting chalk; The end that the diameter of described chalk sleeve body is less is also arranged with dead ring; The end that the diameter of described chalk sleeve body is larger is also provided with cleaning part, and described cleaning part is removably mounted on described end.Had by chalk sleeve of the present utility model and economize on resources.The advantage of the convenient and chalk of wiping not frangibility etc.

Description

Chalk sleeve

Technical field

The utility model relates to stationery, relates to a kind of chalk sleeve particularly.

Background technology

Chalk is the instrument widely used in daily life, and be generally used for book and write on the blackboard, user mostly is teacher.The chalk of domestic use mainly contains common chalk and dust-free chalk two kinds, and its main component is calcium carbonate (lime stone) and calcium sulfate (gypsum), or containing a small amount of calcium oxide.About two cun, common chalk is long, thick, a thin truncated cone-shaped, very well-balanced, very hard very crisp.Because the one-tenth of chalk is grouped into, normal taking can hinder hand, and chalk dust easily sticks to your hands, unclean.In addition, be left chalk end when chalk is write below, due to bad grasping, so only abandon, cause waste.

In addition, when using chalk-writing, occasional has the appearance of wrong word, and usual writer needs again to go to take blackboard eraser wiping wrong word, can cause waste of time when writing time is long.

Utility model content

For the problems referred to above of the prior art, the utility model proposes one and effectively can utilize chalk and wiping chalk sleeve easily.

The utility model provides a kind of chalk sleeve, comprises chalk sleeve body, and the shape of described chalk sleeve body is the truncated cone-shaped corresponding with the shape of chalk;

Described chalk sleeve body is provided with longitudinal opening;

Also be provided with push-pull device at fixed in described chalk sleeve body, described push-pull device at fixed comprises the resettlement section of the larger end of the diameter of the push-and-pull portion outside described longitudinal opening of protrusion and collecting chalk;

The end that the diameter of described chalk sleeve body is less is also arranged with dead ring;

The end that the diameter of described chalk sleeve body is larger is also provided with cleaning part, and described cleaning part is removably mounted on described end.

Further, described chalk sleeve body is made up of soft plastic material.

Further, described cleaning part is sponge.

Chalk in use, is inserted in the push-pull device at fixed resettlement section in chalk sleeve, when chalk long enough, push-pull device at fixed is pushed into top, then fine rotation dead ring by chalk sleeve of the present utility model, then chalk can be fixed in chalk sleeve and use; When shortening gradually along with chalk, then the length by regulating dead ring and push-pull device at fixed to regulate chalk.The adjustment of push-pull device at fixed and dead ring all can complete by one hand, easy to operate, and also can be used when chalk is shorter by chalk sleeve, has saved resource, avoids direct hand contact chalk and the easily broken defect of chalk.

In addition, by being removably mounted on the cleaning part on chalk sleeve end, wiping easily when wrong word appears in writer can be worked as, without the need in addition by blackboard eraser.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of using state of the present utility model.

Reference numeral

Chalk sleeve body 10; Longitudinal opening 11; Push-pull device at fixed 20; Push-and-pull portion 21; Resettlement section 22; Dead ring 30; Cleaning part 40.

Detailed description of the invention

Be clearly and completely described the technical scheme in the utility model below, obviously, described embodiment is only one of them embodiment of the present utility model.

With reference to figure 1 and Fig. 2, the utility model discloses a kind of chalk sleeve, and it comprises chalk sleeve body 10, and the shape of described chalk sleeve body 10 is the truncated cone-shaped corresponding with the shape of chalk 50, and this is that in prior art, the shape of chalk is truncated cone-shaped usually;

Described chalk sleeve body 10 is provided with longitudinal opening 11;

Also be provided with push-pull device at fixed 20 in described chalk sleeve body 10, described push-pull device at fixed comprises the resettlement section 22 of the larger end of the diameter of the push-and-pull portion 21 outside described longitudinal opening 11 of protrusion and collecting chalk;

The end that the diameter of described chalk sleeve body 10 is less is also arranged with dead ring 30;

The end that the diameter of described chalk sleeve body 10 is larger is also provided with cleaning part 40, and described cleaning part 40 is removably mounted on described end.

Further, described chalk sleeve body 10 is made up of soft plastic material.

Further, described cleaning part 40 is sponge

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (3)

1. a chalk sleeve, is characterized in that, comprises chalk sleeve body (10), and the shape of described chalk sleeve body (10) is the truncated cone-shaped corresponding with the shape of chalk (50);

Described chalk sleeve body (10) is provided with longitudinal opening (11);

Also be provided with push-pull device at fixed (20) in described chalk sleeve body (10), described push-pull device at fixed (20) comprises the resettlement section (22) of protruding in the larger end of the diameter of the outer push-and-pull portion (21) of described longitudinal opening (11) and collecting chalk;

The end that the diameter of described chalk sleeve body (10) is less is also arranged with dead ring (30);

The end that the diameter of described chalk sleeve body (10) is larger is also provided with cleaning part (40), and described cleaning part (40) is removably mounted on described end.

2. chalk sleeve according to claim 1, is characterized in that, described chalk sleeve body (10) is made up of soft plastic material.

3. chalk sleeve according to claim 1, is characterized in that, described cleaning part (40) is sponge.