Over-center latch apparatus for a portable computing device

A portable computing device comprising:

• a base unit comprising a processor;
• a display panel coupled to the base unit;
• an apparatus for securing a door comprising:
• a pivot portion coupled to the base unit of a portable computing device;
• an oversnapping arm configured to rotate about the pivot portion;
• and
• an enclosure door comprising an inside surface, an outside surface, a geometric mating feature on the outside surface and an enclosure sealer on the inside surface, wherein the geometric mating feature is configured to present a physical interference to the oversnapping arm when the oversnapping arm is rotated in the direction of the enclosure door;
• wherein the oversnapping arm is configured to bend around the physically interfering geometric mating feature when sufficient force is applied to the oversnapping arm in the rotation direction toward the enclosure door;
• whereby the oversnapping arm is deflected over the geometric mating feature and snaps into a stable, geometrically interlocked position with the geometric mating feature.

An apparatus for sealing a door on a portable computing device, comprising:

• oversnapping means for snapping over an interfering feature;
• an arm interference means for deflecting the progress of a rotating arm;
• an enclosure sealer for creating a water and dust resistant seal around an enclosure;
• and
• a seal tightening means for applying positive pressure on the card enclosure sealer.