A sliding device is capable of decreasing a moving distance of a middle rail while maintaining a maximum moving distance of a movable rail. The sliding device includes a fixed rail fixed to a body into which a storage body is inserted, the movable rail fixed to the storage body, the middle rail installed between the movable rail and the fixed rail and configured to move relatively with respect to the movable rail and the fixed rail, and a driving part configured to move the middle rail so as to move the movable rail by a distance twice a moving distance of the middle rail.

A slide rail assembly includes a first rail including a blocking member and a positioning member, a second rail including a predetermined feature, a working member and an operation member. When the second rail is at a first extending position, the blocking member is in a blocking state capable of blocking the working member so as to prevent the second rail from displacing along a retracting direction. The operation member is capable of being operated to drive the blocking member to leave the blocking state so as to allow the second rail to displace along the retracting direction. When the second rail is displaced from the first extending position to a second extending position along the retracting direction, the second rail is engaged with the positioning member through the predetermined feature so as to prevent the second rail from leaving the second extending position.

A slide rail assembly and a slide rail kit are provided. The slide rail assembly includes a first rail, a second rail, a blocking member, and an operating member. The blocking member is movably mounted on the second rail. When the second rail is positioned at an extending position relative to the first rail, a blocking feature of the first rail blocks the blocking member at a first state, so as to prevent the second rail from being moved from the extending position in a retracting direction. The operating member is operated to be positioned at a position that moves the blocking member from the first state to a second state, such that the blocking feature is unable to block the blocking member at the second state. The operating member is engaged with the predetermined portion of the second rail to be retained at the position.

A slide rail assembly includes a first rail, a second rail, and a third rail. The first rail includes a supporting feature. The second rail can be displaced with respect to the first rail. The third rail is movably disposed between the first rail and the second rail. When the slide rail assembly is in a predetermined state, the supporting feature protrudes beyond an end portion of the third rail by a predetermined distance and supports the second rail.

An embodiment of the present invention provides a pull-out system comprising: at least two slide rails each having a fixed rail, a middle rail slidably arranged on the fixed rail, and a movable rail slidably arranged on the middle rail; and a synchronization means for synchronizing the movement of the movable rail, wherein the synchronization means comprises a roller unit, a synchronization bar connected to the roller unit, and a deflectable element having an end portion fixe to the roller unit and an opposite end portion connected to the movable rail, and the movable rail is configured to move as much as the amount of rotation of the roller unit.

A slide rail assembly includes a first rail, a second rail, a third rail, a synchronization device and a contact feature. The second rail is displaceable relative to the first rail. The third rail is displaceable relative to the second rail. The synchronization device is arranged on one of the second rail and the third rail. The contact feature is arranged on the other of the second rail and the third rail. The third rail and the second rail can synchronously displace relative to the first rail through the collaboration between the synchronization device and the contact feature.

The invention relates to a drawer extraction guide with a corpus rail, a drawer rail, and a center rail and carriages arranged between them. It is provided that a synchronization device comprises at least a first and a second gear set with one or more synchronization wheels that are coupled with each other; that rolls a first synchronization wheel of the first gear set on one of the rails, on a component attached to the rail, on one of the carriages, or on an element attached to the carriage; that rolls a synchronization wheel of the second gear set on a further rail, on an element attached to a further rail, on a further carriage, or on an element attached to a further carriage; the synchronization device comprising a transfer member that is linearly and freely adjustable relative to the corpus rail, the center rail, the drawer rail, and the gear sets; and that one synchronization wheel of the first and the second gear set each roll on the transfer member. The invention allows for a compact configuration of a drawer extraction guide that is synchronized in its movement.

A synchronizing and locking mechanism of a server slide rail includes a middle rail installing structure, an operating plate, an outer rail locking structure and an inner rail synchronous locking structure. The middle rail installing structure is formed on the middle rail and includes an installing part and a through hole. The operating plate is installed to the installing part and has first and second elastic plates, and the first elastic plate has a middle/outer rail locking stop point, an inner rail releasing outer rail locking hook and a pull operation part, and the second elastic plate has an inner/middle rail synchronous stop point and a jack-up part. The outer rail locking structure is installed to the outer rail and includes an outer rail locking hole. The inner rail synchronous locking structure is installed to the inner rail and includes an inner rail locking hole and a synchronous hook.

An embodiment of the present invention provides a pull-out system comprising: at least two slide rails each having a fixed rail, a middle rail slidably arranged on the fixed rail, and a movable rail slidably arranged on the middle rail; and a synchronization means for synchronizing the movement of the movable rail, wherein the synchronization means comprises a roller unit, a synchronization bar connected to the roller unit, and a deflectable element having an end portion fixe to the roller unit and an opposite end portion connected to the movable rail, and the movable rail is configured to move as much as the amount of rotation of the roller unit.

A slide rail assembly includes a first rail, a second rail, and a third rail. The first rail includes a supporting feature. The second rail can be displaced with respect to the first rail. The third rail is movably disposed between the first rail and the second rail. When the slide rail assembly is in a predetermined state, the supporting feature protrudes beyond an end portion of the third rail by a predetermined distance and supports the second rail.