Sequential motion slide assembly and working method thereof

A sequential motion slide assembly, comprising a slide and a slide rear locking device, wherein the slide comprises an inner rail (1), a middle rail (2) slidable relative to the inner rail, and an outer rail (3) slidable relative to the middle rail;

• and the slide rear locking device comprises a middle and inner rail rear locking device (11) provided on the inner rail (1) and located close to a closed end of the inner rail (1), a locking pin (21) provided on the middle rail (2) and located close to a closed end of the middle rail (2), and a middle and outer rail rear locking device (31) provided on the outer rail (3) and located at a middle portion of the outer rail (3);
• from a fully closed state of the slide to a first pull-out state of the slide, the locking pin (21) is clamped in the middle and inner rail rear locking device (11), thereby locking the inner rail (1) and the middle rail (2);
• during the transition from the first pull-out state to a second pull-out state of the slide, after the locking pin (21) clamped in the middle and inner rail rear locking device (11) makes contact with the middle and outer rail rear locking device (31), the locking pin slides from the middle and inner rail rear locking device (11) into the middle and outer rail rear locking device (31) along with movement of the slide and becomes clamped;
• alternatively, after the locking pin (21) clamped in the middle and outer rail rear locking device (31) makes contact with the middle and inner rail rear locking device (11), the locking pin slides from the middle and outer rail rear locking device (31) to the middle and inner rail rear locking device (11) along with the movement of the slide and becomes clamped;
• and
• from the second pull-out state of the slide to a fully extended state of the slide, the locking pin (21) is clamped in the middle and outer rail rear locking device (31), thereby locking the middle rail (2) and the outer rail (3).