Patent ID: 7866236

Claim:
An automatic screw feeding apparatus for a power screwdriver, comprising: a base assembly for connection with the power screwdriver; a slide assembly slidably mounted to said base assembly for forward and backward movement between a first position and a second position along a straight path, said slide assembly having a passage defining a first inlet and a first outlet, whereby a screw carrier can enter said passage from said first inlet and exit said passage from said first outlet; a first spring mounted between said base assembly and said slide assembly for keeping said slide assembly located at the first position; a screw carrier driving device mounted on said slide assembly and movable from the second position to the first position, for driving a screw carrier to move along said passage for a distance, said screw carrier having a part located in said passage; and a screw carrier guidance device having a connection member, a guide member, and at least one second spring, said connection member being connected with said base assembly, said guide member having a first end, a second end, and a guide groove, said guide groove defining a second inlet and a second outlet at the first end and the second end of said guide member respectively, whereby a screw can enter said guide groove from said second inlet and exit said guide groove from said second outlet; said guide member being mounted to said connection member for forward and backward movement between a third position and a fourth position, when said guide member is located at the third position, said second outlet is located close to said first inlet of said slide assembly to enable a screw to smoothly enter said passage from said second outlet of said guide member through said first inlet; said at least one second spring being mounted between said guide member and said connection member for keeping said guide member located at the third position.