A charging mechanism for charging a stored-energy spring of a stored-energy spring mechanism includes a charging gear coupled to the stored-energy spring, an intermediate shaft coupled to the charging gear, an idler gear that can be driven by a charging motor, a freewheel coupled to the idler gear, and a dog clutch that couples the freewheel to the intermediate shaft in order to charge the stored-energy spring and uncouples same from the intermediate shaft in the charged state of the stored-energy spring. The dog clutch has a first clutch block coupled to the intermediate shaft for conjoint rotation, and a second clutch block connected to the freewheel. The first clutch block can be displaced along an axis of rotation of the intermediate shaft between two end positions and, in an intermediate position between the end positions can be freely rotated only in a direction of rotation with respect to the second clutch block.