Universal Joint Structure

Abstract

A connecting rod device for tools contains: a base, a connector, and a limiting element. The base includes a fitting portion, an accommodation portion and at least two locking grooves. The connector includes a spherical knob formed on a first end thereof and accommodated in the accommodation portion of the base, and the connector also includes a drive portion arranged on a second end thereof, wherein the spherical knob has at least two receiving grooves defined therein and corresponding to the at least two locking grooves of the base respectively so as to accommodate at least two balls respectively, and the at least two balls rotatably retain with and drives the at least two locking grooves of the base individually. The limiting element is housed in the accommodation portion of the base so as to limit the spherical knob of the connector in the accommodation portion of the base.

Dependencies are inferred from the claim text.