Semiautomatic chalk sleeve

A chalk cover, semi-automatic technology, applied in the field of teaching tools, can solve the problems of many operation steps, waste, unfavorable teaching and the like

Inactive Publication Date: 2019-02-12
吴和键
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The chalk currently used is very fragile, and it is easy to break when the teacher writes, which is inconvenient to write, and breaking the chalk will cause more waste and is not environmentally friendly. It can slide in the chalk cover, adjust the position of the chalk, and then close the chalk cover to fix the chalk. There are too many operation steps, which is not conducive to teaching

Method used

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  • Semiautomatic chalk sleeve
  • Semiautomatic chalk sleeve
  • Semiautomatic chalk sleeve

Examples

Experimental program
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specific Embodiment approach

[0024] As an improved specific embodiment, a second limiting groove 1020 is opened on the groove wall of the second sliding groove 102, and a second limiting block 211 is arranged on the pushing block 21, and the second limiting The block 211 is embedded in the second limiting groove 1020 and is slidably connected with the second limiting groove 1020 .

[0025] Through the above technical solution, when the pushing block 21 slides on the second sliding groove 102, the second limiting block 211 is embedded in the second limiting groove and slides, which strengthens the connection strength between the pushing block 21 and the chalk cover body 1. The stability of the connection further improves the stability of using the chalk set.

[0026] As an improved specific implementation, the push block 21 is provided with an arc-shaped push surface 210 on one side of the push rod 12 for the thumb to push.

[0027] Through the above technical scheme, the arc-shaped pushing surface 210 is...

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PUM

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Abstract

The invention discloses a semiautomatic chalk sleeve. The semiautomatic chalk sleeve has the advantages that when the chalk sleeve is used, a fixing ring is pushed firstly, the fixing ring is made toget away from clamping blocks, the clamping blocks are opened, chalk is inserted, then, the fixing ring is pushed to fix the clamping blocks, the chalk is fixed in a chalk sleeve body, and the chalk sleeve body is grabbed during usage; and when the part, stretching out of the clamping blocks, of the chalk is used up through writing, a pushing rod is pushed, a connecting piece drives the fixing ring to move at the time, the fixing ring gets away from the clamping blocks, the clamping blocks are separated, the chalk can normally stretch out, and only single-hand operation is needed; and during pushing, the fixing ring is driven to get away from the clamping blocks, few operation steps are adopted, efficiency is high, and accordingly the class efficiency is improved.

Description

technical field [0001] The invention relates to the field of teaching aids, in particular to a semi-automatic chalk set. Background technique [0002] The chalk currently used is very fragile, and it is easy to break when the teacher writes, which is inconvenient to write, and breaking the chalk will cause more waste and is not environmentally friendly. It can slide in the chalk cover, adjust the position of the chalk, and then close the chalk cover to fix the chalk. There are too many operation steps, which is not conducive to teaching. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a semi-automatic chalk set with simple operation. [0004] In order to achieve the above object, the present invention provides the following technical solutions: a semi-automatic chalk set, including: a chalk set body, the chalk set body is hollow, and one end of the chalk set body is provided with clamps dis...

Claims

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Application Information

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IPC IPC(8): B43K23/016
CPCB43K23/016
Inventor 吴和键
Owner 吴和键
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