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Broad-spectrum and easy-to-use chalk sleeve

A chalk sleeve and sleeve technology, applied in the field of teaching equipment, can solve the problems of skin damage, waste of chalk head resources, unhygienic, etc., and achieve the effect of ensuring cleanliness

Inactive Publication Date: 2017-11-24
廖华勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a broad-spectrum easy-to-use chalk sleeve. The present invention solves the problems of traditional chalk burns hands, damages the skin, is very unhygienic, and causes great waste of resources due to unusable chalk tips.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The structural features of this embodiment are:

[0040] Consists of chalk, sleeve, push rod and sleeve cap;

[0041] The sleeve is a tubular structure, the push rod is arranged inside the sleeve, the chalk is arranged in the front end of the sleeve, and the push rod is set at the rear end of the chalk; a strip-shaped through groove is arranged longitudinally on the outer surface of the sleeve, and the strip There are mutually symmetrical teeth on both sides of the type through groove, a chalk button is connected to the rear end of the push rod, and the lower end of the chalk button is arranged in the bar type through groove.

[0042] The sleeve, the push rod and the sleeve cover belong to an integrated structure, and are all integrally formed by a plastic.

Embodiment 2

[0044] The structural features of this embodiment are:

[0045] Consists of chalk, sleeve, push rod and sleeve cap;

[0046] The sleeve is a tubular structure, the push rod is arranged inside the sleeve, the chalk is arranged in the front end of the sleeve, and the push rod is set at the rear end of the chalk; a strip-shaped through groove is arranged longitudinally on the outer surface of the sleeve, and the strip There are mutually symmetrical teeth on both sides of the type through groove, a chalk button is connected to the rear end of the push rod, and the lower end of the chalk button is arranged in the bar type through groove.

[0047] The sleeve, the push rod and the sleeve cover belong to an integrated structure and are all made of a piece of stainless steel coiled.

Embodiment 3

[0049] The structural features of this embodiment are:

[0050] Consists of chalk, sleeve, push rod and sleeve cap;

[0051] The sleeve is a tubular structure, the push rod is arranged inside the sleeve, the chalk is arranged in the front end of the sleeve, and the push rod is set at the rear end of the chalk; a strip-shaped through groove is arranged longitudinally on the outer surface of the sleeve, and the strip There are mutually symmetrical teeth on both sides of the type through groove, a chalk button is connected to the rear end of the push rod, and the lower end of the chalk button is arranged in the bar type through groove.

[0052] The sleeve, the push rod and the sleeve cover belong to an integrated structure and are all formed of one rubber material.

[0053] Four, embodiment four

[0054] The structural features of this embodiment are:

[0055] Consists of chalk, sleeve, push rod and sleeve cap;

[0056] The sleeve is a tubular structure, the push rod is arran...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A wide-spectrum easy-to-use chalk sleeve relates to teaching tools, in particular to a chalk with a chalk sleeve. The purpose of the present invention is to provide a broad-spectrum easy-to-use chalk sleeve. The present invention solves the problems that traditional chalk burns hands, hurts the skin, is very unhygienic, and the chalk tip cannot be used, resulting in a great waste of resources. Its structure As follows: the present invention is mainly composed of chalk, sleeve, push rod and sleeve cover; the sleeve is a tubular structure, the push rod is arranged inside the sleeve, the chalk is arranged in the front end of the sleeve, and the push rod is set at the rear end of the chalk ;The outer surface of the sleeve is longitudinally provided with a strip-shaped through groove, and there are mutually symmetrical teeth on both sides of the strip-shaped through-groove. The two sides are clamped on the teeth on both sides of the bar-shaped through groove; the rear end of the sleeve is also provided with a sleeve cover. The invention solves the disadvantages of traditional chalk burning hands and skin damage.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a chalk with a chalk cover. Background technique [0002] Traditional chalk also has the following disadvantages. One is a trapezoidal structure with a cross-section at the front end. At the beginning of writing, the lines were too thin, so a small part was often broken off; but when it was later, the remaining part appeared thick and round, and it was difficult to hold it in the hand, and it was often thrown away. Contents of the invention [0003] The purpose of the present invention is to provide a broad-spectrum easy-to-use chalk sleeve, which solves the problems of traditional chalk burns hands, damages the skin, is very unhygienic, and causes great waste of resources due to unusable chalk tips. [0004] A wide-spectrum easy-to-use chalk sleeve of the present invention is composed of chalk, a sleeve, a push rod and a sleeve cover; the sleeve is a tubular structure, the push rod is arran...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K23/016B43K24/16
CPCB43K23/016B43K24/16
Inventor 廖华勇
Owner 廖华勇
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