| 摘要 |
According to the present invention, a driving head-changeable tool comprises a tool set and a driving head. The tool set comprises an adapter, a case, and one or more restriction members. The adapter has a receiving groove and a driving end corresponding to each other. A plurality of protrusion ribs extended in an axial direction and a plurality of concave grooves positioned between the protrusion ribs are installed on the inner surface of the receiving groove. A polygonal sphere-shaped head of a driving head is inserted into the concave grooves of the receiving groove. The case is assembled to the outside of the adapter to restrict each other while sliding in the axial direction and has a recessed part and a protruding part on the inner surface thereof. The case slides to a first position and a second position with respect to the adapter. The restriction members are press-fitted in the adapter and selectively protrude from the receiving groove. When the case is positioned in the first position, the protruding part is in contact with the restriction members to protrude from the receiving groove and the restriction member allows the polygonal sphere-shaped head to be held on the receiving groove to be restricted. When the case is positioned in the second position, with regard to the recessed part and the restriction members, the restriction members enter the recessed part and the polygonal sphere-shaped head is drawn out from the receiving groove. |
