| 摘要 |
PURPOSE: A driver is provided to improve work efficiency by enabling a user to selectively control rotational speed when large torque is required. CONSTITUTION: A driver(D) comprises a front body(100), a rear body(200), a connecting ring(300), one or more side gears(400), a center shaft(500), and an elastic member(600). A second main gear(210) of the rear body and a first main gear(110) of the front body are coaxially arranged. The connecting ring is arranged between the first and second main gears. The side gears are engaged with the first and second main gears at a right angle. A driver bit is coupled to one end of the center shaft. The elastic member moves the center shaft from a contraction position to a return position. |
