Chalk using sleeve

Abstract

A chalk use case includes a sleeve, the sleeve includes an inner cylinder and an outer cylinder, and the inner cylinder is arranged in the outer cylinder. One side of the inner cylinder is provided with a first through hole, one side of the outer cylinder is provided with a second through hole, and the first through hole and the second through hole are located on the same side. The end of the inner cylinder away from the through hole 1 is fixedly equipped with a rotating rod, and the end of the outer cylinder away from the through hole 2 is provided with a through hole 3, and the rotating rod extends out of the outer cylinder from the through hole 3, and the rotating rod is connected to the through hole 3 through a rotating mechanism. A helical blade is fixedly installed in the inner cylinder, a chalk installation cylinder is adsorbed on the helical blade, and the mouth of the chalk installation cylinder extends out of the inner cylinder. An intercepting rod is fixedly installed in the outer cylinder, and the intercepting rod is connected to the chalk installation cylinder protruding from the inner cylinder. The mouth of the chalk installation cylinder is aligned with the second through hole, and a bayonet for blocking the chalk is installed in the second through hole. In the invention, the chalk is set on the spiral blade, and the rotary rod is rotated to push the chalk forward, which solves the problem that the chalk becomes short and cannot be held and cannot be written, and reduces the waste of the chalk.

Description

technical field [0001] The invention relates to a teaching appliance, in particular to a chalk use case. Background technique [0002] When using chalk, it is often accompanied by the problem that the chalk is easy to break. Simultaneously, the chalk becomes shorter after being used for a period of time, and cannot be held in the hand more comfortably after being shortened, thereby affecting writing, and then it is wasteful to replace the chalk, so it is necessary to propose a suitable chalk use case for the above problems. Contents of the invention [0003] In order to solve the above problems, the present invention provides a kind of chalk with simple structure and improved utilization rate of short chalk. [0004] The present invention solves its technical problem and realizes through the following technical solutions: [0005] A kind of chalk use cover, comprising a sleeve, the sleeve includes an inner cylinder and an outer cylinder, the inner cylinder is arranged in...

AI Technical Summary

Problems solved by technology

[0002] When using chalk, it is often accompanied by the problem that the chalk is easy to break

At the same time, the chalk becomes shorter after being used for a period of time, and it cannot be held in the hand more comfortably after being shortened, thereby affecting writing, and it is more wasteful to replace the chalk, so it is necessary to propose a suitable chalk use case for the above problems.

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