Laser ring to turn it on permanently

This ring push the switch for turning on the 301 cheap green laser http://www.banggood.com/301-5mw-Adjust-Green-Laser-Pointer-Pen-Light-18650-Battery-Charger-p-981343.html
I use it for pointing the stars with my telescope, coupling to this https://www.thingiverse.com/thing:608140