Patent ID: 8752917

Claim:
A ball bushing positioning structure, comprising: a sliding rail configured to be affixed to a server for slidably coupling to a carrier rail; a carrier rail comprising a bottom wall, and a slot cut through said bottom wall near a front side thereof; a ball bushing movably set between said sliding rail and said carrier rail and carrying a plurality of spaced rolling balls, said ball bushing comprising an opening, a narrow mouth defined in a front side of said opening, opposing rearward facing left and right stop edges bilaterally and transversely disposed between said opening and said narrow mouth, and opposing left and right guide edges respectively and obliquely outwardly extended forwardly from said left and right stop edges at two opposite lateral sides relative to said narrow mouth; a release hook having a front side thereof affixed to said carrier rail and a rear side thereof terminating in a protruding hook tail and a retaining flange at opposite left and right sides relative to said hook tail, said retaining flange comprising two upright guide walls respectively spaced from said hook tail by a gap and two stop edges respectively located at respective front sides of said upright guide walls, said protruding hook tail being stoppable at a bottom surface of said bottom wall of said carrier rail to force said hook tail into said slot of said carrier rail; and a release control member affixed to said sliding rail at a selected location for forcing said hook tail of said release hook into said slot of said carrier rail to cause disengagement of the stop edges of said release hook from the stop edges of said ball bushing after insertion of said sliding rail into said ball bushing and said carrier rail during installation.