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.

A slide rail assembly includes a first rail, a second rail, a slide assisting device, an engaging member and a supporting structure. The slide assisting device is configured to assist in relative movement between the second rail and the first rail. The engaging member and the supporting structure are arranged on the first rail. The second rail is movable from a retraced position along a first direction to be detached from the first rail. When the second rail is moved along the first direction and detached from the first rail, the slide assisting device is moved to be adjacent to the engaging member. During a process of the second rail being moved from a passage entrance of the first rail toward the retracted position along a second direction, the supporting structure is configured to support the second rail, and is extended beyond the engaging member along the first direction.

A slide rail assembly includes a first rail, a second rail and a positioning device. The first rail includes a first structure and a second structure. The second rail is movable relative to the first rail. The positioning device is arranged to the second rail and includes an elastic member and a positioning member. The elastic member provides an elastic force to the positioning member. When the second rail is moved relative to the first rail from a first position to a second position, the positioning member is moved to an engaging position through the elastic force and abuts against the first structure. When the second rail is moved relative to the first rail from the second position to a third position, the positioning member is moved from the engaging position to a disengaging position and no longer abuts against the first structure by guidance of the second structure.

A slide rail assembly includes a first rail, a second rail, a third rail, a functional member and a movable member. The first rail is movably mounted between the third rail and the second rail. The functional member is arranged on the third rail and includes a positioning part. The movable member is arranged on the first rail and includes an engaging section elastically extended toward the third rail. When the first rail is moved relative to the third rail to an open position, the first rail is configured to be engaged with the positioning part of the functional member through the engaging section of the movable member, in order to hold the first rail at the open position.

A slide rail assembly includes a first rail, a second rail, a third rail, a locking member, and an operating member. The second rail is displaceable with respect to the first rail from a first position to a second position. The third rail is displaceable with respect to the second rail. The locking member can prevent the second rail from displacement with respect to the first rail from the second position toward the first position when in a first state. The operating member can be operated in order to switch the locking member from the first state to a second state, in which the second rail is displaceable with respect to the first rail from the second position toward the first position.

A slide rail assembly includes a first rail, a second rail, a first locking mechanism, and a second locking mechanism. The second rail can be displaced with respect to the first rail. The first locking mechanism and the second locking mechanism are disposed at two different portions of the second rail respectively and can be locked to the first rail separately in order to keep the second rail at either of two predetermined extended positions. The first locking mechanism and the second locking mechanism can then be operated and thereby unlocked from the first rail so that the second rail can be retracted with respect to the first rail.

A slide rail assembly includes a first rail, a second rail, a mounting member, a third rail, a fourth rail and a synchronizing member. The first rail includes a disengaging feature. The third rail and the fourth rail are arranged on two side of the mounting member, and the synchronizing member is arranged on the mounting member. The third rail is movable relative to the first rail and the second rail is movable relative to the fourth rail. When the second rail is moved from a retracted position along a direction, the second rail and the mounting member are synchronously moved through the synchronizing member. When the second rail and the mounting member are moved to a predetermined position, the synchronizing member is driven by the disengaging member of the first rail to be no longer synchronously moved.

A slide rail assembly includes a first rail, a second rail and a blocking member. The second rail is movable relative to the first rail. The blocking member is movably arranged on the first rail. When the second rail is moved relative to the first rail from a retracted position to an extension position, the second rail is blocked by the blocking member.

A slide rail assembly includes a first rail, a second rail and a mounting member. The mounting member is arranged with a third rail and a fourth rail. Wherein, the third rail is movable relative to the first rail, and the second rail is movable relative to the fourth rail.

A rail assembly includes a panel, a first rail, a second rail, an installation device, a support device and a locking device. The panel is connected to the locking device and one side of the first rail. The second rail is mounted to the first rail. The installation device includes a first part and a second part respectively connected to the first and second rails. The support device is connected to one side of the second rail and supports the shelves. The locking device is located between the panel and the first rail. The locking device includes a release member and a locking member. The locking device prevents the first rail from separating from the second rail.