US Patent 7318248 Cleaner having structures for jumping obstacles

A cleaner having structures for jumping obstacles is provided. A lower portion of a main body of the cleaner is disposed with a movable chassis, and the center of the chassis is formed with a hollow post that is to be inserted in a sleeve of the main body of the cleaner and is hooked by a hook element. The hollow post and the sleeve are moveable with each other, such that the hollow post can move up and down in the sleeve freely. A movable dustpan board is mounted on a front periphery of the chassis by long posts and springs.