Electric driver

摘要

A power screwdriver ( 10 ) includes a bit holder ( 14 ) bored to receive the shaft of a screwdriver bit ( 12 ) and adapted to securely hold the screwdriver bit ( 12 ) in place, and a housing ( 18 ) having a through cavity ( 16 ). The bit holder ( 14 ) is inserted into the through cavity ( 16 ) so that the bit holder ( 14 ) is rotatable about and movable along the axis of the bit holder. This arrangement securely holds the screwdriver bit and thus, minimize rattling of the screwdriver bit during rotation.