CN203004666U

CN203004666U - Chalk sleeve

Info

Publication number: CN203004666U
Application number: CN 201220618272
Authority: CN
Inventors: 吴岚
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-21
Filing date: 2012-11-21
Publication date: 2013-06-19
Anticipated expiration: 2022-11-21

Abstract

The utility model provides a chalk sleeve, which is characterized by comprising a chalk cylinder and a push-outward cylinder, wherein an internal thread is arranged on the inner wall of the chalk cylinder, and the push-outward cylinder is positioned in the chalk cylinder; an external thread corresponding to the internal thread is arranged at the push cylinder head corresponding to the push-outward cylinder, and a push handle is arranged at the end part of the push-outward body corresponding to the push-outward cylinder; a regulating fixing bolt is also arranged on the chalk cylinder; and a holding part is arranged on the outer side of the chalk cylinder. The utility model provides the chalk sleeve through improvement, the chalk sleeve has a simple structure and is easily manufactured, and only chalks are put into the chalk sleeve. After a chalk is shortened, the push-outward cylinder is rotated so that the remaining chalk is pushed. The chalk sleeve is conveniently used and is practical, and the cost is low. The chalk sleeve can be widely popularized and is convenient for class writing of teachers, the chalk resource can be reasonably utilized, chalk dust can be prevented from dirtying fingers, the chalk is not easily broken, and the chalk sleeve is simple and is easily used.

Description

A kind of bush of chalk

Technical field

The utility model relates to a kind of auxiliary teaching device, is specifically a kind of bush of chalk.

Background technology

Chalk is convenient, economical because of it in teaching, and is subject to being widely used of teachers and students.At present, most of chalks have all been lost after having used short, as people when using chalk, normally directly arrest chalk with finger and write, the operation finger is very easily dirty like this, and this health for teacher is disadvantageous, and chalk can break when a little firmly writing, cause waste, cause the waste of chalk resource, therefore need to make improvements.

The utility model content

The purpose of this utility model is to overcome the deficiency that existing chalk exists in writing process, provides a kind of bush of chalk at this, plays booster action during with chalk-writing.

The utility model thing realizes like this, construct a kind of bush of chalk, it is characterized in that: include chalk cylinder and outer pushing cylinder, the chalk cylinder inner wall is provided with internal thread, outer pushing cylinder is positioned in the chalk cylinder, and pushing cylinder head corresponding to outer pushing cylinder is with the external screw thread corresponding with internal thread, and the end of the extrapolation body that outer pushing cylinder is corresponding is provided with and pushes away handle, also be provided with the adjusting set bolt on the chalk cylinder, the outside of chalk cylinder is provided with and grips the position.

The beneficial effects of the utility model are: the utility model provides a kind of bush of chalk by improvement, the utility model is simple in structure, making is easy, as long as chalk is packed in the chalk cylinder, write when chalk and rotate by outer pushing cylinder the chalk that just can will not write after short and release, practicality easy to use, cost is low, can promote widely, write for teacher's classroom and brought convenience, also make the chalk resource be able to reasonable utilization and can prevent the chalk dust finger of making dirty, make chalk be not easy fracture, and simple.

Description of drawings

Fig. 1 shows the utility model structural representation

Fig. 2 is outer pushing cylinder part schematic diagram

Fig. 3 is chalk cylindrical outer schematic diagram

In figure: 101, chalk cylinder, 101a, internal thread, 102, outer pushing cylinder, 102a, pushing cylinder head, 102b, external screw thread, 102c, extrapolation body, push away handle at 102d, and 103, regulate set bolt, 104, grip the position, 105, chalk.

The specific embodiment

1-3 is elaborated to the utility model below in conjunction with accompanying drawing, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model provides a kind of bush of chalk, include chalk cylinder 101 and outer pushing cylinder 102, chalk cylinder 101 inwalls are provided with internal thread 101a, outer pushing cylinder 102 is positioned at 101 li of chalk cylinders, the pushing cylinder head 102a of outer pushing cylinder 102 correspondences is with the external screw thread 102b corresponding with internal thread 101a, the end of the extrapolation body 102c of outer pushing cylinder 102 correspondences is provided with and pushes away handle 102d, also is provided with on chalk cylinder 101 to regulate set bolt 103, and the outside of chalk cylinder 101 is provided with and grips position 104.As long as chalk is packed in the chalk cylinder, write when chalk and rotate by outer pushing cylinder the chalk that just can will not write after short and release, practicality easy to use, cost is low, can be undertaken by the hand-held position 104 that grips when writing, be convenient to finger and surely hold, regulate set bolt 103 and can withdraw from and precession, be used for pushing away the also chalk of fixing internal.

Above-mentioned explanation makes this area professional and technical personnel can realize or use the utility model.Therefore, the utility model will can not be restricted to shown in this article these and implement, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. bush of chalk, it is characterized in that: include chalk cylinder (101) and outer pushing cylinder (102), chalk cylinder (101) inwall is provided with internal thread (101a), it is inner that outer pushing cylinder (102) is positioned at chalk cylinder (101), the pushing cylinder head (102a) of outer pushing cylinder (102) correspondence is with the external screw thread (102b) corresponding with internal thread (101a), the end of the extrapolation body (102c) that outer pushing cylinder (102) is corresponding is provided with and pushes away handle (102d), also be provided with on chalk cylinder (101) and regulate set bolt (103), the outside of chalk cylinder (101) is provided with and grips position (104).