Patent ID: 6905221
Filing Date: 2005-06-14
Classification: B25B

Abstract:
1. A screwdriver comprising: a handle having a plastic gear mechanism and a bit engaging device connected to a first end of the gear mechanism, a power source connected to the gear mechanism, a positive plate and a negative plate respectively connected to the gear mechanism received in the handle, a light frame connected to the gear mechanism and at least one light bulb connected to the light frame, a positive ring and a negative ring respectively engaged with the light frame, a spring mounted to the bit engaging device and connected between the negative ring and the negative plate, the at least one light bulb connected to the positive ring and the negative ring, a gap defined between the positive plate and an extension of the positive ring, and an annular switch rotatably mounted to the light frame and including a touch piece which contacts both of the position plate and the extension of the positive ring to light the at least one light bulb.