CN201895485U - Breakage-resistant tube for chalk - Google Patents

Abstract

A breakage-resistant tube for a chalk relates to teaching aids and mainly solves the problems that the chalk is easy to be broken and chalk powder is easy to attach to hands. The breakage-resistant tube for the chalk structurally comprises a hard rubber tube and a plastic rod, and is characterized in that the plastic rod is a solid rod with a diameter identical to that of the chalk, and the hard rubber tube is sleeved outside the plastic rod and connected with the plastic rod threadedly. The breakage-resistant tube for the chalk solves the problems that the chalk is easy to be broken due to overexertion and the chalk powder is easy to attach to fingers, and is convenient for people to use.

Description

The anti-breaking pipe of a kind of chalk

Technical field

The utility model relates to a kind of teaching aid, the anti-breaking pipe of specifically a kind of chalk.

Background technology

Last class hour, chalk is the requisite educational aid of teacher, but, when on blackboard, writing, owing to exert oneself excessive or the chalk poor quality with chalk, chalk is easy to fracture, lose time like this, also can cause unnecessary waste, and the full hand that can be stained with when writing with chalk word all is the chalk face, will be stained with clothes or on the face because of carelessness, influence attractive in appearance.

The utility model content

The purpose of this utility model is to provide a kind of chalk anti-breaking pipe, and solution chalk easy fracture and chalk powder easily are infected with problem to hand.

The technical scheme in the invention for solving the technical problem is: the anti-breaking pipe of a kind of chalk, its structure comprises ebonite pipe and sticking plaster, it is characterized in that, described sticking plaster is the diameter solid bar identical with chalk, sticking plaster is with the ebonite pipe outward, and ebonite pipe and sticking plaster are by being threaded.

The beneficial effects of the utility model are: prevent chalk fracture, directly contact chalk without hand when using chalk, prevent that chalk powder is infected with to hand.

Description of drawings

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

Among the figure: 1 chalk, 2 sticking plasters, 3 ebonite pipes.

The specific embodiment

As shown in Figure 1.The anti-breaking pipe of a kind of chalk, its structure comprise ebonite pipe 3 and sticking plaster 2, described sticking plaster 2 solid bar identical that be diameters with chalk 1, and the sticking plaster 2 outer ebonite pipes 3 that are with, ebonite pipe 3 and sticking plaster 2 are by being threaded.

During use, chalk 1 is put into ebonite pipe 3, rotation ebonite pipe 3 and sticking plaster 2 are regulated the length that chalk 1 exposes, and can prevent to make because of overexertion the problem of chalk 1 fracture like this, can also solve the problem of being infected with chalk powder on the finger, are convenient for people to use.

Claims (1)

1. anti-breaking pipe of chalk, its structure comprises ebonite pipe and sticking plaster, it is characterized in that, and described sticking plaster is the diameter solid bar identical with chalk, and sticking plaster is with the ebonite pipe outward, and ebonite pipe and sticking plaster are by being threaded.