Patent ID: 7383756

Claim:
A torque screwdriver structure comprising: a holder that has an elongated hole, and inner threads on its top; an adjusting tube has a penetrating hole for the screwdriver bit bar to penetrate through, and male threads on the outer surface set to thread with the said inner threads of the said holder; a positioning bar that has, in one side, a fitting body that can fit with the said holder, and has, in the other side, a fixing ring with at least three equally-spaced ball holes on its wall with each said ball hole collaborating with one fixing ball; a screwdriver bit bar, in one side, is mounted with a thin rod that in order fit with a spring and a sliding tube that has a conical hole at bottom; the said screwdriver bit bar further has multiple teeth at its bottom; the said teeth fit inside the said fixing ring of the said positioning bar in one side and collaborates with the said conical hole of the sliding tube in the other side; the driving torque can be set by threading the said adjusting tube clockwise or counterclockwise.