Chalk sleeve

A chalk cover and chalk technology, which is applied to non-moving pencils, printing, writing utensils, etc., can solve the problems of complex chalk advancing mechanism, inconvenient control of chalk advancing length, etc., and achieve the effect of easy control of the advancing length.

Inactive Publication Date: 2013-03-20
曲政宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this kind of chalk set pen is that: the chalk propulsion mechanism is complex, the propulsion distance is determined by the distance between the card slots, and the chalk propulsion length is not easy to control
Also do not have a kind of simple in structure, the easy-to-control chalk cover pen of advancing length

Method used

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  • Chalk sleeve

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0013] Such as figure 1 As shown, the chalk sleeve includes a sleeve 1 with an open front end. The front end of the sleeve 1 is a sleeve 10 that tapers inwards. Concave such that the diameter of the central portion is smaller than the diameter of the front port. An end cap 12 is screwed on the front section of the casing 1 . The middle front portion of the outer wall of the sleeve pipe 1 is provided with a concave hand-held portion 14, which is convenient for users to hold the present invention; a hook 13 is fixedly installed on the outer wall of the rear portion of the sleeve pipe 1, and the structure of the hook 13 is equivalent to the suspension hook on the pen , its structure is the prior art, and will not be repeated here. The rear end of the sleeve 1 is rotatably equipped with a back cover 3, the rear end of the sleeve 1 is provided with a protruding ring platform, and the inner wall of the back cover 3 is provided with a ring groove corresponding to the ring platform,...

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PUM

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Abstract

The invention discloses a chalk sleeve, which comprises a sleeve with an opening at the front end. A rear cover is rotatably installed at the rear end of the sleeve. A stud which stretches into the cavity of the sleeve is fixedly installed at the middle part of the rear cover. A nut is screwed on the stud. Supporting pipes which stretch forwards are fixedly installed on the nut. Guide discs are installed on the side surface of the nut and the supporting pipes. An annular sunk groove for the guide discs to slide forwards and rearwards is arranged on the inner wall of the sleeve. A chalk pushing core is installed at the front ends of the supporting pipes. A chalk clamping groove is arranged on the front end surface of the chalk pushing core. The chalk sleeve has the advantages that the structure is simple and the pushing length of the chalk is easy to control.

Description

technical field [0001] The invention relates to a chalk set pen which can be loaded with chalk and pushed out. Background technique [0002] In order to prevent the chalk from causing breakage and using up the chalk as much as possible in the writing process, many kinds of chalk set pens have appeared in reality. This chalk set pen has the function of being able to pack chalk and push the chalk outward. The basic structure of existing chalk set pen is as follows: it comprises the cylindrical sleeve of front end opening, and chalk propulsion mechanism is housed in the sleeve. In the invention patent with the patent number of 200420020611.4, a chalk set pen is introduced, which includes a sleeve and a push plug. The chute moves and can be snapped into the push handle of the slot. The shortcoming of this chalk set pen is that: the chalk propulsion mechanism is complex, the distance of propulsion is determined by the distance between the card slots, and the chalk propulsion le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/14B43K23/016B43K24/00
Inventor 曲政宇
Owner 曲政宇
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