CN201211774Y

CN201211774Y - Chalk sleeve

Info

Publication number: CN201211774Y
Application number: CNU2008201206389U
Authority: CN
Inventors: 戴小琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-03
Filing date: 2008-07-03
Publication date: 2009-03-25
Anticipated expiration: 2018-07-03

Abstract

The utility model discloses a chalk sleeve which comprises a rotary cover provided with a screw mandrel inside. The screw mandrel is connected with a chalk shell through screw threads, a vertical opening is arranged on the chalk shell, and a clamping device is arranged outside the chalk shell. The utility model has the advantages that a piece of chalk can be loaded in the chalk sleeve so as to reduce the contact between a teacher and the chalk, and the chalk sleeve has simple and convenient use.

Description

A kind of chalk sleeve

Technical field

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

Background technology

Chalk is indispensable on the teacher dais, the big and small chalk that has much broken of having put in the general chalk holder.The teacher directly takes chalk with hand, will be stained with chalk dust on hand, contacts other objects such as books after hand is made dirty, and make other objects also be with chalk dust, and skin is also had certain influence, be the problem of teacher's worries.And the chalk that has much broken takes up and is inconvenient to write, and often is dropped, and causes certain waste.

Summary of the invention

At the deficiencies in the prior art part, the purpose of this utility model provides the convenient again chalk sleeve that uses of a kind of environmental protection.

The purpose of this utility model is achieved through the following technical solutions: a kind of chalk sleeve, and it comprises that an inside has the swivelling cover of screw mandrel, and screw mandrel has vertical opening by the chalk housing that is threaded on the chalk housing, and Chalk casing is external a clamping device.

On at the bottom of the lid of described screw mandrel in swivelling cover.

The screw thread of screw thread corresponding to screw mandrel arranged in the described chalk housing.

Described chalk housing one side opening.

Described clamping device is a pair of handle that links to each other by rotating shaft and the chuck of handle end.

Advantage of the present utility model is: chalk can be loaded in the chalk sleeve, has reduced contacting of teacher and chalk, and chalk sleeve is easy to use.

Description of drawings

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

Fig. 2 is the cutaway view after Fig. 1 unloads lower fixture.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:

Fig. 1, Fig. 2 have provided a kind of chalk sleeve of the present utility model, and it comprises that an inside has the swivelling cover 2 of screw mandrel 1, and screw mandrel 1 has vertical opening 4 by the chalk housing 3 that is threaded on the chalk housing 3, and a clamping device 5 is arranged outside the chalk housing 3.

Screw mandrel 1 is fixed in center at the bottom of the lid in the swivelling cover 2.

The screw thread of screw thread corresponding to screw mandrel arranged in the chalk housing 3.

Chalk housing 3 one side openings can make chalk fill in the chalk housing 3.

Clamping device 5 is for by the continuous a pair of handle 7 of rotating shaft 6 and the chuck 8 of handle end.

During use, chuck 8 is opened, chalk 9 is filled in the chalk housing 3, and then, chuck 8 is clamped chalk housing 3, twisting swivelling cover 2 is screwed in the chalk housing 3 screw mandrel 1, along with constantly being screwed into of screw mandrel 1, chalk 9 is extruded thereupon outward, gets final product up to the length of needs, exposed parts uses up and can continue to twist swivelling cover 2, uses up up to whole chalk 9 and changes chalk 9.

At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above examples of implementation, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims

1, a kind of chalk sleeve is characterized in that, it comprises that an inside has the swivelling cover of screw mandrel, and screw mandrel has vertical opening by the chalk housing that is threaded on the chalk housing, and Chalk casing is external a clamping device.

2, chalk sleeve according to claim 1 is characterized in that, at the bottom of the lid of described screw mandrel in swivelling cover on.

3, chalk sleeve according to claim 1 is characterized in that, the screw thread of screw thread corresponding to screw mandrel arranged in the described chalk housing.

4, chalk sleeve according to claim 1 is characterized in that, described chalk housing one side opening.

5, chalk sleeve according to claim 1 is characterized in that, described clamping device is a pair of handle that links to each other by rotating shaft and the chuck of handle end.