| 摘要 |
PURPOSE: A wireless compact electric driver using a rotation speed reducer is provided to reduce working time because a plurality of driver bits is replaced using a multi-socket. CONSTITUTION: A wireless compact electric driver comprises a driver bit, a socket, a lighting lamp, a rotation speed reducer(500), and an overcharge prevention circuit. One end or both ends of the driver bit are formed into a shape corresponding to a bolt, so that the driver bit can be replaced. The lower exterior part of the driver bit is processed with synthetic resin in order to improve the contact force between a driver case and the driver bit. The lighting lamp emits light to the end of the driver bit. The socket is coupled to one side of the driver case and coupled with the driver bit. The rotation speed reducer comprises a first shaft(501), first and second carriers(504,509), first and second planetary gears(505,506), and a ring gear(507). The first carrier has a fitting shaft(502) which is coupled with a gear shaft(501b) and a sun gear(503). The first carrier is coupled with the sun gear of the first carrier and rotated. The second carrier comprises a sun gear which is inserted in the center of the first planetary gear. The ring gear is coupled with the second planetary gear and rotated. The rotation speed reducer transfers torque to the socket and increases torque. The overcharge prevention circuit is arranged inside the driver case.
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