Patent ID: 7832930

Claim:
A linear motion guide unit comprising: an elongated guide rail having a first lengthwise raceway surface thereon, and a slider being lengthwise movable along the elongated guide rail, the slider being comprised of: a carriage made therein with a second raceway surface in opposition to the first raceway surface and a return passage extending in parallel with a load-carrying race defined between the first and second raceway surfaces, end caps mounted on lengthwise opposite ends of the carriage and made therein with turnaround passages connecting the load-carrying race with the return passage, more than one roller capable of rolling through a circulating circuit composed of the load-carrying race, the return passage, and the turnaround passages, a retainer plate extending lengthwise in opposition to the load-carrying race to keep the roller in the load-carrying race, and a binding strip to fasten the retainer plate to the carriage; wherein the end caps each have spigots extending out of an end of the end cap to come into communication with the turnaround passages, while the retainer plate has lengthwise opposite ends to make connections with the spigots of the end cap to guide axially opposite ends of the roller, and the lengthwise opposite ends of the retainer plate conform to ends of the spigots in a complementary relation to fit over the ends of the spigots in a sliding direction.