Abstract: An improved hanger structure, which is fitted with a U-shaped arched clipper; hooks are set separately at end of two support arms of the clipper and at its opposite flat end; a slot is set separately at the other end of two support arms, into which a tape spring with pretension force is embedded; the hook could drive and pull the tape spring via the hooking rack, such that the hook could be pulled back into the clipper; the present invention is stably supported in a three jaw pattern, so it can be mounted flexibly on the back of the rear-view mirror of various dimensions, meanwhile on-board electronics such as driving recorder, GPS and velometer can be efficiently integrated, allowing to maintain good vision in the vehicle compartment without affecting the driving safety.