Patent attributes
A tool holder includes: a base, including a chassis, a boss and a convex shaft formed with an abutment plate. A rotating sleeve, including a seat and a quadrangular sleeve joint, and a groove is formed on the bottom surface of the seat to set on the boss. The hollow chamber in the quadrangular sleeve joint is laterally formed with elastic pieces. An intermediate wall is formed between the hollow chamber and the groove, and the intermediate wall is formed with a perforation. A segmented positioning member, including an engaging part formed on the periphery of the boss, and first and second inserting parts. The first and second inserting parts are formed on the circumferential wall of the groove of the rotating sleeve. An elastic anti-dropping flange is formed on the convex shaft of the base, and the outer diameter must be larger than the diameter of the corresponding perforation.
