Based on the traditional hand-operated pencil sharpener, the behavior analysis is carried out, and a new form of pencil sharpener is designed from the aspects of human habits, actions and forces. This pencil sharpener refers to the pedal form of the bicycle tooth plate, which makes the left and right hands alternately save effort and effort when winding the pen. The innovative shrink-fold design makes this pencil sharpener more portable.
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Genius Designer
Interesting, very thoughtful!
Wow, big brother has a lot of ideas.
I came to gather together a lively ah
It feels quite interesting
It's amazing.
The rocker that looks like a walking tractor.
Ladies and gentlemen, spray