SELF-RETAINING ASSEMBLY PIN
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2001-Oct-30
Most pivoting belt-clip systems incorporate a metal pin which serves as a rotation bearing surface and fastening device. The majority of these pins require a snap ring or washer to retain them in the assembly. This additional piece-part adds to the product cost and manufacturing complexity. There are pivot pins on the market which are self-retaining, however they require a frictional force from the bearing surface for retention. This weakens plastic bosses commonly used in radio products. Some designs rely on a compression fit which results in stress relaxation, others require a spline force fit which create stress concentrations in the boss. Both of these designs sacrifice the structural integrity of the assembly.