US Patent 10973322 Slide rail assembly

A slide rail assembly includes a first rail and a second rail. The first rail has a plurality of walls and is provided with a blocking feature, wherein the walls jointly define a channel. The second rail is provided with a foolproof feature. When the second rail, after being turned through a predetermined angle with respect to the first rail, is mounted into the channel from outside the channel, the foolproof feature and the blocking feature block each other to prevent the second rail from being retracted with respect to the first rail.