Lever Acuated Pen

3D printable lever acuated pen. Just as fun to play with then with the original one.
I've simplified and gave some strenght to the locking mechanism and reworked some parts in the pen. The lenght of the ballpoint pen is not so critical. The best is around 120mm. At this point it's a press fit into the piston. If yours is longer, and you don't want to cut it, it's not a problem. At this point, the screw can hold onto the pen. In the closed state, the locking looks pretty weak, tho I've been abusing this pen for half a year now, and it's still works perfecty. The lock is in a pretty unreachable place, so it won't break off easily.

In action:
https://www.youtube.com/watch?v=URJuZrVIqTg

Hardware for assembly:
- 1 M3 x 4mm
- 1 M3 x 5mm (maybe a bit shorther)
- 1 M3 x 10mm
- 1 spring from a pen
- 1 ball point pen (120mm lenght suggested)

When assemybling, put a drop of oil, or any kind of lubricant on the contact points. If you disassembled once, you might put some threadloc