| 摘要 |
<p>Assembly of screw and screwdriver which are mutually self-gripping and comprising a screw head having slits separated by means of four similar teeth so that the point of a screwdriver in conformity with said slits can be introduced therein. Each slitted section is formed essentially by a base and the two side walls which also form the side walls of the teeth so that the orientation of said side walls in each tooth form an angle therebetween; the centre of said angle is located towards the inside of the screw head so that said angle has a configuration which widens away from the centre of the screw head; the side walls have a slightly oblique configuration which forms a larger width at the lower portion of the tooth in comparison with the upper portion of said tooth. The assembly is also characterized in that the screwdriver has a point which matches the slits of the screw head in order to facilitate the nesting and gripping between said point and said screw head.</p> |
