| 摘要 |
A positioning pivot including a shaft having a first portion, a second portion and a third portion, a sleeve and a hinge butt and is able to prolong its life span by inserting the third portion into the sleeve and the second portion into a first collar of the hinge butt. With the helical grooves defined in the second and the third portions, the helical slits defined in the sleeve and the first collar are able to disperse the lubricant over a larger area and thus provide the proper friction therebetween. |
