Ergonomic Fume Extractor

The fume extractor has to be printed with supports. It can be printed in PLA, but I d recommend a more heat resistant plastic,at least for the fan cover. If wanted, an active carbon filter can be added between the fan and the fan cover.  

Additional pieces:

1 or 2* 18650 batteries

1* bms for the battery with charging protection

1* boost convertor (my fan at least requires 12V, so an boost covertor has to be used) 

1* main switch

1* OPTIONAL potentiometer to adjust the speed of the fan

1*small spring

1* 3x15 M3 bolt and nut

4* M3 screws for mounting the fan and fan's covers

1* glue

Instructions:

The gear, screw and threadPart go in their place like in the photos , then the case can be glued together. The boost convertor has enough space on the opposite side of the HeightScrew and the battery stays on the bottom. For reference use the attached schematic. 

Don t forget to use a spring or a rubber washer at the adjustable joint.