Abstract: A conventional shaped, generally oval, toilet seat assembly having a toilet seat lid with an aft extension which houses a spring-latch bolt mechanism and a common axle which serves to hold the lid, and toilet seat, and the companion anchor bolt lock-block assemblies and hinges together. A single removable compression spring exerts a constant outward pressure on the latch bolts in the lid extension which interface with and are forced against the inside surface of the companion anchor bolt lock-blocks. When the lid is moved to the horizontal (down) position the latch bolts are aligned with and automatically extend from the lid into the matching latch bolt holes in the anchor bolt lock-bolt assembly. The lid and seat remain in the down and locked position until the latch bolts are retracted.