NATO40 Switch

Hey all,

I have designed a new NATO40 switch. I had designed one a while back (I'll be honest, I cannot remember if I uploaded it), but the issue was it did not let enough air through.

This new design is based on the old one, but with massively increased airflow.

The way it works is, once fully assembled the side opposite the twist handle is always open (I imagine connected to the gas mask), then twisting the handle will change between the left side and the right.

At the moment there is only one set up:

Based on the gas mask:

-Input, male connector, connects to the gas mask port. Always open

-Output, Female connector, Left and right. Can change between based on the twist of the handle.

To assemble:

1) place the "Switch Body" with the male end on the table.

2) insert the "Switch Valve" into the body with the plus facing you. The small notch sticking out of the valve should fit into the groove on the body.

3) Now press in the lid. To ensure correct orientation, the on 2 sides of the lid edge is and edge which sticks out then gradually tapers down. the bit which gradually tapers down should be facing the switch body. this should be pressed in to the grooves of the lid. Push hard until both sides clip in.

4) attach the "Switch Handle" align the plus with the handle and press on.

This should finish the assembly process.

To Print:

This file was designed and then tested on the Bambu Lab X1 Carbon. I imagine each tolerances are slightly different between printers. Let me know if you need versions which have different tolerances (or change it yourself).

I print with 20% infill, 4 walls with supports (touching build plate only). For the "Switch Body" I have the male end touching the build plate. Therefore no supports are touching the inside of the "Switch Body". For the "Switch Valve" I have it print with the plus facing up... I imagine it will work either way around. The lid and the handle should work either way (although with the lid there is one way round which does not require supports).

Hopefully this works for you. It has printed fairly well on my printer and the switch mechanism works well.