New whiteboard markers

Teaching aid pen Board book painting

When the whiteboard pen is writing and switching colors, the lid is inconvenient to open and close and the lid is wrong, which causes the inconvenience of using interaction and reduces the efficiency of writing and drawing. Throw away the whiteboard marker after use, waste of resources. Therefore, the lifting structure and the rotating closed iris structure are applied to the new whiteboard pen, and the two structural designs are linked to provide a more optimized interaction mode, so that the pen cover can be easily closed with a slight swipe of the thumb. The ink sac increases the circulation rate and ensures an adequate supply of ink.