Unmanned aerial vehicle undercarriage folding mechanism and unmanned aerial vehicle

The utility model relates to an unmanned aerial vehicle undercarriage folding mechanism and unmanned aerial vehicle, this unmanned aerial vehicle undercarriage folding mechanism includes the adapter, undercarriage and button assembly, the undercarriage is including rotating first supporting legs and the second supporting legs of connecting in the relative both sides of adapter, first supporting legs and second supporting legs adapter relatively rotate to merge into each other with deviating from and nearly launch the position, and the adapter rotates to merge into each other closely and reaches folding position relatively, button assembly is including the button, lock piece and the reset spring of sliding connection on the adapter, the opposite direction of pressing the direction of reset spring orientation button promotes the button, the one end and the button fixed connection of lock piece, the other end can with first supporting legs and second supporting legs locking, and this locking can be relieved by p