LOCKING APPARATUS, CONNECTION STRUCTURE AND ELECTRICAL DEVICE

Embodiments of the present application provides a locking apparatus, a connection structure and an electrical device. The locking apparatus comprises: a housing comprising a first wall, a first opening being formed on the first wall; a bolt provided in the housing and configured to penetrate through the first opening; a sleeve provided in the housing and sleeved on the bolt, wherein the sleeve and the bolt are circumferentially locked and axially movable; a limiting member fixed to the housing and configured to prevent the sleeve from disengaging from the housing in a direction away from the first wall; and an elastic member provided in the housing and configured to apply an elastic force in the axial direction to the sleeve, such that the sleeve is engaged with the limiting member, and the limiting member is configured to circumferentially lock the sleeve when engaged with the sleeve; wherein two ends of the elastic member are abutted against the first wall and the sleeve, respectively. The locking device can reduce the occupation of the installation space, and is suitable for different installation environments.