Abstract: A collapsible labyrinth is constructed with a plurality of collapsible separating boards temporarily secured by vertical pivotal posts, two horizontal bars respectively on and under a line of separating boards to secure upper and lower ends of the pivotal posts, and tenons fitting in a mortise in a lower end of each separating board and also in one of tenon holes preset in the ground for securing temporatily each separating board so that the boards can be altered in position to make up a labyrinth route.

Abstract: An automobile safety belt device includes a retract unit for stopping a safety belt from lengthening by using a motor which pulls a rope to move an adjusting wheel nearer two fixing wheels in the retract unit for pinching immovable the safety belt in case of a shock caused by an accident or an urgent stepping on a brake.