Abstract: A tonneau cover comprising: (a) a plurality of panels; (b) one or more hinges located between and connecting each panel of the plurality of panels; and (c) one or more rotary locks located on a first side, a second side, or both sides of one or more of the one or more hinges, one of the plurality of panels, or both, the one or more rotary locks including: (i) one or more panel caps; and (ii) one or more rail locks that create a lock with the one or more panel caps when the tonneau cover is in a closed position so that the tonneau cover is prevented from being opened proximate to the one or more hinges.

Abstract: A tonneau cover comprising: (a) a plurality of panels; (b) one or more hinges between each panel of the plurality of panels so that the plurality of panels are rotatably connected together, wherein some or all of the one or more hinges include: (i) a plurality of expansion links that are movably interconnected together, some of the plurality of expansion links including: (1) one or more expansion projections; (2) one or more pockets that receive all or a portion of the one or more expansion projections from an adjacent one of the plurality of expansion links; and (3) one or more expansion stops that restricts movement of the one or more expansion projections from the adjacent one of plurality of the expansion links that extend within the one or more pockets; wherein the one or more hinges rotate so that the one or more hinges form of angle of about 90 degrees or more and about 225 degrees or less.