CN201559417U

CN201559417U - chalk cleaner

Info

Publication number: CN201559417U
Application number: CN2009202407110U
Authority: CN
Inventors: 刘晓茗
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-29
Filing date: 2009-10-29
Publication date: 2010-08-25
Anticipated expiration: 2019-10-29

Abstract

The utility model discloses a chalk cleaner, belonging to the field of teaching aids, and particularly relates to a clean chalk sleeve which leads chalk powder to be incapable of adhering on hands. The chalk cleaner is characterized in that the chalk is sleeved with an cylindrical, telescopic and elastic sleeve, side walls of which take the shapes of wave; the length of the sleeve is shorter than that of common chalk; the opening end part of the sleeve is provided with a ring-shaped edge. When in use, the chalk is inserted into the sleeve, and one end of the chalk is contacted with the bottom part of the sleeve; the sleeve is held by hand, and one end of the chalk head of the outer part of the sleeve is led to be contacted with articles such as a desk of a teacher and a blackboard; the sleeve is pushed with effort toward the direction of the chalk head, and the length of the sleeve is adjusted according to the length of the chalk and the need of the hand for holding the chalk; and then fingers are used to clench the sleeve for writing, the clenching of the fingers are loosened at any time according to writing need, the chalk head is extruded by mean of articles, and the sleeve is extended and retracted to adjust the length of the sleeve. Therefore, without other parts, the scales of the sleeve and the chalk can be adjusted only by pushing and pressing of fingers, therefore the chalk cleaner is convenient and practical.

Description

The chalk cleaner

Technical field

The utility model belongs to the teaching aid field, and particularly a kind of chalk powder that makes can not adhere on hand the cleaning powder pen cap.

Background technology

Always be stained with the chalk powder when teacher uses chalk usually on hand, prior art also discloses some chalk cleaning sleeves, but general structure is more complicated all, operate discontinuous, it such as the patent No. 200520085106.2 the Chinese utility model patent cleaning powder pen cap, this cleaning powder pen cap comprises presses the chalk pipe that device, bottom chalk sleeve and bottom are fixed with one deck rubber, its special character is: the device of pressing that there is spring an inside is fixed on the top of chalk pipe, and a bottom chalk sleeve is fixed in described bottom of pressing device.Need operate annex when this patent is used, intermittence stops to write, the waste certain hour, and applicability is relatively poor.

The utility model content

In order to overcome existing cleaning powder pen cap complex structure, operate discontinuous, time-consuming deficiency, the utility model provides a kind of chalk cleaner, and this chalk cleaner structure is simple, can adjust the length of the pen cap at any time as required.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of chalk cleaner, it is characterized in that: the sidewall of a cylindrical shape of socket is corrugated retractable resilient sleeve on chalk, the length that is shorter in length than general chalk of its sleeve, there is the annular edge edge sleeve openings end.

During use chalk is inserted in the sleeve, its chalk one end is contacted with the bottom of sleeve, hand is taken sleeve, with the first end in contact lectern of the chalk of sleeve outside, objects such as blackboard, push hard sleeve to chalk head direction, according to the length of chalk and the length of the needs adjustment sleeve of holding chalk, write with the finger grips sleeve then, loose one's grip at any time, by object extruding chalk head according to writing needs, extension sleeve, adjust the length of sleeve, do not need miscellaneous part like this, if finger push away and press the yardstick that just can adjust sleeve and chalk, convenient and practical, cost is low, be easy to promote.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model,

Among the figure, 1. chalk, 2. telescopic resilience sleeve, 3. annular edge edge.

The specific embodiment

The specific embodiment of the present utility model is, as shown in the figure: embodiment 1, a kind of chalk cleaner, and the sidewall of a cylindrical shape of socket is corrugated retractable resilient sleeve 2 on chalk 1, the length that is shorter in length than general chalk 1 of its sleeve 2, there is annular edge the sleeve openings end along 3.During use chalk 1 is inserted in the sleeve 2, hand is taken sleeve 2, with objects such as the first end in contact lectern of the chalk of sleeve 2 outsides, blackboards, push hard sleeve 2 to chalk head direction,, write with finger grips sleeve 2 then according to the length of chalk and the length of the needs adjustment sleeve 2 of holding chalk, at any time loose one's grip according to writing needs, by object extruding chalk head, extension sleeve 2, the length of adjustment sleeve 2.

Claims

1. chalk cleaner, it is characterized in that: the sidewall of a cylindrical shape of socket is corrugated retractable resilient sleeve on chalk, the length that is shorter in length than general chalk of its sleeve, there is the annular edge edge sleeve openings end.