A locking apparatus for covering and releasing a charging interface of a motor vehicle. The locking apparatus comprises a cover element, which is pivotable relative to the charging interface and which can be displaced between a closed position and an open position. The locking apparatus is equipped with a flexible connection element, which is rigidly connected to the cover element at one upper end region of the cover element in the direction of the vehicle along the transverse extent of the cover element. The cover element is at the same time permanently and in every position coupled by the connection element for protecting the charging interface with a part that is stationary relative to the charging interface.