Slide rail assembly

A slide rail assembly comprising:

• a first rail comprising a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the first rail, and the first wall, the second wall and the longitudinal wall of the first rail cooperatively defining a channel of the first rail;
• a second rail movably mounted on the channel of the first rail, and the second rail comprising a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the second rail;
• an aiding-slide device movably mounted on the channel of the first rail, the aiding-slide device comprising a main body and a plurality of rolling members arranged on the main body and supported between the first rail and the second rail, the main body of the aiding-slide device comprising a first predetermined feature;
• and
• an auxiliary member arranged inside the channel of the first rail, the auxiliary member comprising a resilient arm, and a second predetermined feature and an actuating section being arranged on the resilient arm;
• wherein the aiding-slide device is retained at a predetermined position by an engagement of the first predetermined feature and the second predetermined feature when the second rail is detached from the channel of the first rail along an opening direction;
• wherein the second predetermined feature is driven to engage with the first predetermined feature along a first transverse direction in response to a resilient force of the resilient arm;
• wherein when the second rail is inserted into the channel of the first rail from outside of the channel of the first rail along a retracting direction, a working portion on the second rail abuts against the actuating section of the resilient arm to drive the resilient arm to disengage the second predetermined feature from the first predetermined feature along a second transverse direction for allowing the aiding-slide device to displace from the predetermined position along the retracting direction, and the first transverse direction is opposite to the second transverse direction;
• wherein the first transverse direction is in a direction toward the longitudinal wall of the first rail, and the second transverse direction is in a direction away from the longitudinal wall of the first rail and toward the longitudinal wall of the second rail.