Stake of teaching obstacle

The utility model discloses a stake of teaching obstacle, stake of teaching obstacle include base and sleeve, and the bottom surface of base is ARC structure, and the inner wall center of base is equipped with the balancing weight, and sleeve detachable connects at the top of base, and telescopic cylinder diameter reduces from bottom to top gradually, and telescopic top is equipped with the collar, hang in the collar to have to be used for the sleeve to shake the measured time sending sound warning's small bell. Above -mentioned stake of teaching obstacle, the bottom surface of base is ARC structure, and the balancing weight sets up the inner wall center of base, therefore stake of teaching obstacle's focus is lower. Receive when touching as stake of teaching obstacle, the skew balancing seat of stake of teaching obstacle slope, the focus risees, causes potential energy to increase, and under the effect of gravity, stake of teaching obstacle gets back to balancing seat initial locating place promptly, therefo