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 defining a channel of the first rail cooperatively;
• a second rail movably mounted on the channel of the first rail and displaceable relative to the first rail longitudinally;
• an aiding-slide device movably mounted between the first rail and the second rail, the aiding-slide device comprising a first surface and a second surface, a transverse distance between the first surface and the longitudinal wall of the first rail being greater than a transverse distance between the second surface and the longitudinal wall of the first rail;
• an auxiliary member connected to the aiding-slide device, the auxiliary member comprising an engaging feature, a connecting portion and an extending portion, the connecting portion being configured to be connected to the second surface, the extending portion extending from the connecting portion, and the engaging feature being arranged on the extending portion;
• and
• a retaining member arranged on the longitudinal wall of the first rail, the retaining member comprising a resilient portion, and the resilient portion comprising an accommodating structure;
• wherein the auxiliary member and the aiding-slide device are made of a first material and a second material, respectively;
• wherein when the second rail is detached from the channel of the first rail by displacing relative to the first rail along an opening direction, the engaging feature of the auxiliary member stretches into the accommodating structure of the resilient portion of the retaining member to restrain the aiding-slide device from displacing relative to the first rail longitudinally;
• wherein the longitudinal wall of the first rail comprises a protrusion configured to stretch into the accommodating structure, and the accommodating structure is a hole structure defined by a plurality of walls.