CN201989471U

CN201989471U - Chalk protecting cover

Info

Publication number: CN201989471U
Application number: CN201120001509XU
Authority: CN
Inventors: 柳淑庸
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-04
Filing date: 2011-01-04
Publication date: 2011-09-28
Anticipated expiration: 2021-01-04

Abstract

The utility model relates to a chalk protecting cover, which belongs to a teaching aid and mainly solves the problems that fingers are polluted when a chalk is used and waste is caused by the breakage of chalks. The chalk protecting cover comprises a protecting cover body, wherein the protecting cover body is in a piston type and consists of a push rod and an outer barrel, both ends of the outer barrel are opened, one end of the push rod is arranged in the outer barrel and is connected with the chalk, and the other end of the push rod extends out of the outer barrel. The chalk protecting cover is safe and convenient to use, can protect fingers against dust pollution, and effectively reduces and avoids the problems that long chalks are broken off in a process in use and short chalks are not easy to grip, the chalk protecting cover can be reused, and the waste is reduced.

Description

A kind of chalk protective jacket

Technical field

The utility model relates to a kind of teaching aid, specifically is a kind of chalk protective jacket.

Background technology

Class hour on to the student, the chalk teaching aid is the indispensable instrument of teaching at present, and teacher can often take chalk write on blackboard, because chalk dust has stronger adsorption capacity, hand directly contacts again for a long time with chalk, and hand skin can be badly damaged, and has influenced the healthy of educator; Frangibility when in addition, long chalk uses; Short and small chalk is not easy again to hold, and causes very big waste; If a kind of chalk sleeve of protecting finger can be arranged, will be to teachers healthy useful especially, can also reduce the fracture and the wasting phenomenon of chalk simultaneously.

The utility model content

The purpose of this utility model is to provide a kind of chalk protective jacket, and this protective jacket can suitably be regulated protection simultaneously according to the different length of chalk and point not by dust pollution.

The technical scheme in the invention for solving the technical problem is: a kind of chalk protective jacket, its structure comprises the protective jacket body, described protective jacket body is a piston type, constitute by push rod and urceolus, described urceolus both ends open, push rod one end is arranged in the urceolus and connects chalk, and the other end extends to the urceolus outside.

The beneficial effects of the utility model are: make simple, with low cost, safe and convenient to use; the protection finger is not subjected to dust pollution; effectively reduce and avoided in the long chalk use fractureing and short chalk is difficult for the problem that grips, reusable, phenomenon cuts the waste.

Description of drawings

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

Among the figure: 1 push rod, 2 urceolus, 3 chalks.

The specific embodiment

As shown in Figure 1.A kind of chalk protective jacket, its structure comprises the protective jacket body, described protective jacket body is a piston type, constitute by push rod 1 and urceolus 2, described urceolus 2 both ends opens, push rod 1 one ends are arranged in the urceolus 2 and connect chalk 3, and the other end extends to urceolus 2 outsides, and push rod 1 length is slightly larger than urceolus 2 length.Before the use, chalk 3 is directly packed in the urceolus 2,, expose the 5-10 millimeter to chalk 3, hold urceolus 2 and write,, promote push rod 1 at any time inwards and get final product then according to chalk 3 abrasion conditions according to chalk 3 length adjustment push rods 1 position.

The utility model is made simple, and is safe and convenient to use, and the protection finger is not subjected to dust pollution, effectively reduce and avoided in the long chalk use fractureing and short chalk is difficult for the problem that grips, reusable, phenomenon cuts the waste.

Claims

1. a chalk protective jacket is characterized in that, comprises the protective jacket body, and described protective jacket body is a piston type, is made of push rod and urceolus, and described urceolus both ends open, push rod one end are arranged in the urceolus and connect chalk, and the other end extends to the urceolus outside.