Abstract: A slide rail assembly includes a rail member that has a hold portion, a middle block member that is disposed on the rail member, and an operation member that has a resilient plate and a middle push portion. The resilient plate has a first resilient portion. When the first resilient portion of the resilient plate engages the hold portion of the rail member upon operating the operation member, the operation member is not movable relative to the rail member. When the first resilient portion of the resilient plate engages the hold portion of the rail member, the middle push portion of the operation member pushes against the middle block member such that the operation member prevents the middle block member from moving.

Abstract: A slide rail mechanism includes a slide rail device having a support frame, and a slide rail assembly including a displacement structure, an auxiliary structure set on the displacement structure, a first rail, a second rail and a third rail. The displacement structure, the auxiliary structure, or the switching structure is installed between the slide rail assembly and the slide rail device, enabling the slide rail assembly to achieve stable movable displacement or convenient operation relative to the slide rail device. The support frame, working in conjunction with the slide rail device, effectively integrates the slide rail assembly, resulting in a synergistic effect.

Abstract: A returning mechanism and a slide rail assembly using the returning mechanism, which has a synchronous member disposed between a first engagement feature and a second engagement feature. When the synchronous member is displaced between the first end of the first engagement feature and the stroke of the second engagement feature, the synchronous member continues to abut against a first elastic body until the synchronous member is displaced to the second end of the second engagement feature to complete the return. When the synchronous member is between the stroke of the first engagement feature and the second end of the second engagement feature, the synchronous member continues to rest against the second elastic structure until the synchronous member moves to the first end of the first engagement feature to complete the return.