Retractable headphone holder to mount under your desk.
The holder hides under your desk until you need it.
Pull it out to use it as headphone holder (or hold anything you want)
It uses a simple gear + gear rack to allow pull/push of the rack.
(optionally) A spring can be attached to the lever to lock the rack at a certain position, unless you pull the lever.
Tip: Try out GCode Simulator to check your print upfront
On Thingiverse: http://www.thingiverse.com/thing:44286
GCodePrintr - 3D printing from an Android device
Printed using GCodePrintr App on Android