US Patent 7887085 Folding and fixing structure of a people-carrying vehicle

A foldable people-carrying vehicle includes two pivotal members interposed between and pivoted at two ends thereof to a vehicle body and a seat of the vehicle; the vehicle further includes a fixing mechanism to fix the seat; the pivotal members each have a first fixing hole to cooperate with the fixing mechanism in order to fix the seat in a lowered not-in-use position, and a second fixing hole to cooperate with the fixing mechanism to fix the seat in a raised in-use position; the fixing mechanism includes two spring-biased fixing components, which are normally partly held in the fixing holes to fix the seat; a handle is fitted on the seat, and two pulling strings are connected to the handle, and connected to the fixing components respectively; the fixing components can be moved out of the fixing holes for the seat to become movable when the handle is pulled.