Extruded tap water pen for black board

Abstract

The invention relates to the technical field of teaching supplies, in particular it is a novel teaching writing pen-extrusion type fountain pen blackboard pen. It includes a pen cap, nib, compression chamber, liquid storage chamber and liquid injection port cover. There is a limit lock between the front end pen holder and the middle end pen holder. The pen holder, the middle pen holder and the rear pen holder form the compression chamber. The rear end of the elastic switch liner of the compression chamber is connected to the ventilation duct and passes through the check steel ball that can slide up and down, and is limited by the limit bracket in the liquid storage chamber. Located at the axis of the pen body. The present invention is characterized in that it can be used not only on blackboards, but also on whiteboards and boards of any color. It not only has the characteristics of strong chalk covering ability, clear writing and thick lines, but also has the advantages of convenient use, labor-saving and fast writing, repeated liquid injection, and long-term use to completely solve "dust pollution".

Description

Technical field: [0001] The invention relates to the technical field of teaching supplies, in particular to a novel teaching writing pen-extrusion type fountain pen blackboard pen. Background technique: [0002] For many years, teachers have been using chalk to write on the blackboard, and "dust pollution" has been polluting the classroom and damaging the health of teachers and students. Many people have come up with various methods to solve this problem, such as China Patent application Nos. 99252756 and 02204876 respectively disclose utility model patents named "direct ink writing pen" and "coreless ink pen". Although the above disclosed inventions have their own advantages, they also have their own shortcomings. The problem of "dust pollution" has not been completely solved. [0003] With the development of science and technology, various disposable whiteboard markers have appeared on the market, so can they replace chalk? After investigation and experimentation, the an...

AI Technical Summary

Problems solved by technology

It can effectively solve the century-old problem of "dust pollution". Its principle is to use the reaction force of the blackboard to the pen during writing to compress the space of the pen body, so that the writing liquid is squeezed and flows out of the pen body. Therefore, the pen is called As squeeze fountain chalkboard markers

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