Locking mechanism for folding legs

A portable support device, comprising:

• a substantially planar support surface having an underside;
• a plurality of pairs of coupled legs attached to the underside of the support surface, said coupled legs of each pair of legs having a connecting member connected therebetween, and being rotatable between a folded position substantially parallel to the support surface, and an extended position for supporting the support surface;
• a leg locking mechanism connecting a top end of each leg to the underside of the support surface, said leg locking mechanism comprising a pair of oppositely disposed locking faces having a plurality of flat-topped angularly spaced, radial teeth, said teeth being configured for interlocking engagement;
• and
• said leg locking mechanism further comprising a selectively releasable engagement mechanism configured for engaging and disengaging the teeth, to allow rotation of the respective leg between the extended position and the folded position.

A locking mechanism for a support leg hingedly attached to a support surface and rotatable between an extended position and a folded position, comprising:

• a base attached to the support surface, having a locking side including a plurality of angularly spaced, radial teeth;
• a rotatable coupler disposed at an end of the support leg, the rotatable coupler having a counter-locking side disposed opposite the locking side of the base, the counter-locking side having a plurality of angularly spaced, radial teeth configured to mate with the teeth of the base, and a cam surface disposed in a cam aperture of the coupler;
• a cam cylinder rotatably disposed in the cam aperture of the coupler, the cam cylinder having a cam surface in rotatable sliding engagement with the cam surface of the coupler, and having a first rotational position wherein the respective cam surfaces are engaged so as to create the cam biasing force, and a second rotational position wherein the cam surfaces are disengaged;
• a biasing spring configured for biasing the counter-locking side of the coupler away from the locking side of the base;
• a torsion spring connected to the base and the cam cylinder, and configured for biasing the cam cylinder in the first position, the biasing force of the torsion spring being greater than the biasing force of the biasing spring;
• and
• a release lever connected to the cam cylinder, the release lever configured for allowing a user to rotate the cam cylinder from the first position to the second position by pressing on the lever, to thereby allow disengagement of the teeth of the base and the coupler.

A locking mechanism for a folding leg attached to a table, comprising:

• a two-position mating lock attached to the table and the leg, configured for selectively locking the folding leg in an extended position or a folded position;
• a biasing member configured for biasing the mating lock in a disengaged position;
• and
• a selectively releasable cam mechanism configured for biasing the mating lock in an engaged position, and providing a force greater than the disengaging force of the biasing member.