An article of the invention is incorporated herein by reference in its entirety. BACKGROUND OF THE INVENTION

摘要

The present disclosure provides a pivot stop comprising a pivot member, a first protrusion coupled to the pivot member and a second protrusion coupled to the pivot member, and a second plate having a first interference surface and a second interference surface. Interference between the first protrusion and the first interference surface and the second protrusion and the second interference surface tends to limit the rotation of the rotating member relative to the second plate. the pivot stop may further comprise a rail, wherein the second plate is configured to travel along the rail.