Opening and/or closing mechanism on doors, gates/flaps or the like, in particular on motor vehicles

An opening and closing mechanism for a motor vehicle having a door, said mechanism comprising:

• a lock having a housing, in which there is arranged a retention element, which has a pawl and a rotary latch, and with a closing element designed as a striker hoop, which is in operative connection with the lock in a closed position, it being possible for the rotary latch to be moved between a release position and a retention position, in which the rotary latch catches the closing element, the rotary latch having at least one rotary latch section with a stop surface, and the pawl having a pawl section with a stop surface, and, in the retention position, the stop surface of the at least one rotary latch section and the stop surface of the pawl section touching in a contact region, and, upon deformation of the housing, the housing being contacted at least partially by the retention element, in particular by a section of the rotary latch, in order to prevent the door from opening, wherein upon deformation of the housing in the retention position, the stop surface of the at least one rotary latch section of the rotary latch enters into a positive-locking connection with the housing, the positive-locking connection preventing the door from opening.