Screw device that drops is prevented to screwdriver

The utility model discloses a screw device that drops is prevented to screwdriver, including screwdriver and sleeve, in the screwdriver inserts the sleeve, be provided with the spout on the sleeve, outer surface of sleeve overlaps and has put the cutting ferrule, be provided with fastening screw on the cutting ferrule, fastening screw pass the spout support to lean on with the screwdriver on, still be provided with reset spring between cutting ferrule and the sleeve, it prevents hole and diaphragm spring still to be provided with the screw on the sleeve, the utility model discloses a diaphragmspring and reset spring realization are fixed to the screw, and it is fixed reliable, can prevent effectively that the screw from dropping, simultaneously the utility model discloses a direct axis direction along the barrel of screw stretches out and final and screwdriver breaks away from the contact, is suitable for the operation in narrow and small space, can effectively improve the operating efficiency of screwdriver