Extruded fountain pen for black board

Abstract

The invention relates to an extrusion tap water blackboard pen, comprising a cap, a head, a compression chamber, a liquid chamber and a pouring cover, wherein a limit lock opening is arranged between the front pen holder and the middle pen holder, the back pen holder is connected with the pouring cover which contains a valve, the front, middle and back pen holders form the compression chamber whose back end of the striking switch container is connected with a ventilation tube and through a stop steel ball which can slide up and down, the liquid chamber via a limit support is fixed at the axis of pen. The invention is characterized in that the pen can be used on blackboard, white board or any other boards, with rough write line, or the like.

Description

Technical field: [0001] The invention relates to the technical field of teaching supplies, in particular to a novel teaching writing pen-extrusion type tap 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 answer is n...

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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