A driving mechanism for a slide rail assembly with a first and a second rails includes a first driving device, a locking device, a swing member and a second driving device. The first driving device includes a first elastic member and a first base. The first elastic member accumulates a first driving force when the swing member abutting against a locking part of the locking device. The second driving device is mounted to the second rail and includes a second base movably connected to the first base, a blocking member movable in a guiding section of the second base, and a second elastic member. When the second rail and the second base are moved from a retrieve position toward an open position relative to the first rail, the blocking part abuts against a portion of the guiding section for allowing the second elastic member to accumulate a second driving force.

A slide rail assembly includes a first rail, a second rail and a sliding auxiliary device. The second rail is longitudinally movable relative to the first rail. The sliding auxiliary device is movably arranged between the first rail and the second rail. The sliding auxiliary device includes a first part and a second part mutually engaged. At least one rolling member is mounted to one of the first part and the second part for facilitating the second rail to move relative to the first rail.

A three-sectional hidden sliding rail, which is able to solve a usage problem influenced by asynchronous sliding rails at two sides of a conventional three-sectional hidden sliding rail during using, includes a pair of sliding rail sub-mechanisms which is symmetrically mounted at a left side and a right side of a movable object. Each sliding rail sub-mechanism includes a fixed guide rail (1), a middle rail (2), and a movable guide rail (3). The fixed guide rail (1) is mounted on a fixed object through a fixed guide rail bracket (4). The movable guide rail (3) is mounted on a side surface of the movable object through a movable guide rail bracket (5). The fixed guide rail (1) and the movable guide rail (3) both have a horizontally parallel sliding guide groove. An upper end and a lower end of the middle rail (2) are respectively mounted in the sliding guide grooves of the movable guide rail (3) and the fixed guide rail (1). The middle rail (2) is able to slide along the sliding guide groove of the fixed guide rail (1), and meanwhile the movable guide rail (3) is able to slide along the middle rail (2). The sliding rail sub-mechanisms at the left side and the right side of the movable object are connected through a synchronous mechanism. The synchronous mechanism includes gear rack mechanisms which are respectively mounted on the sliding rail sub-mechanisms at the left side and the right side of the movable object horizontally and in parallel. The gear rack mechanisms on the sliding rail sub-mechanisms at the left side and the right side of the movable object are connected through a connection shaft (29).

An embodiment of the present invention provides a pull-out system comprising: at least two slide rails each having a fixed rail, an intermediate rail slidably disposed on the fixed rail, and a moving rail slidably disposed on the intermediate rail; and a synchronization means for synchronizing movements of the respective slide rails with each other.

An electric slide rail (100) comprising: a track system (110); a power assembly (120); and a transmission system; wherein the track system (110) comprises an upper rail (111), a middle rail (112), and a lower rail (113) arranged from top to bottom, the power assembly (120) is fixed to the lower rail (113), the transmission system is fixed to the middle rail (112), and the electric slide rail (100) is configured such that the power assembly (120) provides power to move the track system (110) via the transmission system.