Tool Head Structure

Abstract

A tool head structure is used to screw a general screw or screw a damaged screw and comprises two cutting edges located at the center of the front end thereof. Between the two cutting edges is formed a ridge line, at the central axis of the tool head structure is formed a chisel point, and behind the two cutting edges are formed two concave flank portions, and each flank portion is correspondingly linked up with the concave engaging portion. By such arrangements, the tool head structure of the present invention can solve the problem of easy slipping and being unable to remove the damaged screw.

1 . A tool head structure comprising a plurality of protruding driving portions and concave engaging portions shaped correspondingly to a screwing recess of a screw at a front end thereof, characterized in that:
 at a convergence center of the protruding driving portions and the concave engaging portions are formed two cutting edges, and between the two cutting edges is formed a ridge line, on the ridge line is formed a chisel point located correspondingly to a central axis of the tool head structure, and behind the two cutting edges are formed two concave flank portions, each flank portion is correspondingly linked up with the concave engaging portion.   
   
   
       2 . The tool head structure as claimed in  claim 1 , wherein each protruding driving portion of the tool head structure is formed a scraping surface, and a cutting direction of the scraping surface is the same as a screwing direction of the screw. 
   
   
       3 . The tool head structure as claimed in  claim 1 , wherein the tool head structure is integrally formed, and one end of the tool head structure opposite the chisel point is in the form of a hexagonal column for assembling with relevant tools. 
   
   
       4 . The tool head structure as claimed in  claim 1 , wherein the front end of the tool head structure is shaped correspondingly to a cross-shaped screwing recess of the screw and equally formed with four protruding driving portions. 
   
   
       5 . The tool head structure as claimed in  claim 1 , wherein the front end of the tool head structure is shaped correspondingly to a slot-shaped screwing recess of the screw and equally formed with two protruding driving portions.