The utility model discloses a subassembly is opened to sky that can long -range switching, open including empty, the empty openly middle part outer convex who opens becomes the boss, is equipped withthe board button on the boss, and the empty left and right sides face of opening all is equipped with wiring mouthful, still include thrown cut device, thrown cut device includes the casing, locates the runner of casing and fixes the commentaries on classics board on the runner, and the pivot of runner is established in the casing, and the one side of changeing the board is extended to form alongits length direction and is used for the button cover of tight cover on the empty board button of opening, still be equipped with driving motor, controller and communication ware in the casing, driving motor's power output shaft passes through drive assembly and links to each other with the pivot and drive the pivot and rotate, and driving motor's the signal input part and the signal output part of controller link to each other, and the controller links to each other and receives the control command who comes from the peripheral hardware terminal through communication ware and peripheral hardware terminal, the utility model discloses can realize long -rangely to driving the operation of capable switching in vain into to shorten the empty operating time of opening of device power, improve switching operation efficiency, reduce staff's intensity of labour.