Slide rail assembly

A slide rail assembly comprising:

• a first rail, a bracket being arranged on the first rail;
• a second rail displaceable relative to the first rail longitudinally;
• a third rail movably mounted between the first rail and the second rail;
• a mounting fitting comprising a connecting portion and a first engaging portion;
• and
• an aid-sliding device;
• wherein each of the first rail, the second rail and the third rail comprises a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall;
• wherein the aid-sliding device comprises a plurality of rolling balls supported between the first wall of the third rail and the first wall of the second rail and between the second wall of the third rail and the second wall of the second rail;
• wherein one of the first rail and the bracket comprises a predetermined feature;
• wherein when the second rail is located at a retracted position relative to the first rail, the plurality of rolling balls are neither supported between a non-supporting section of the first wall of the third rail and a non-supporting section of the first wall of the second rail nor between a non-supporting section of the second wall of the third rail and a non-supporting section of the second wall of the second rail, such that a first gap is formed between the non-supporting section of the first wall of the third rail and the non-supporting section of the first wall of the second rail and a second gap is formed between the non-supporting section of the second wall of the third rail and the non-supporting section of the second wall of the second rail;
• wherein the connecting portion of the mounting fitting is configured to be detachably connected to the predetermined feature, and the first engaging portion of the mounting fitting is configured to stretch into the first gap to engage with the first wall of the second rail for preventing the second rail from displacing away from the retracted position.

A slide rail assembly comprising:

• a first rail, the first rail comprising a front end and a rear end opposite to the front end, a bracket being arranged on the first rail, the bracket comprising a predetermined feature and a lateral wall exceeding the front end of the first rail by a predetermined longitudinal distance, and the predetermined feature being arranged on a section of the lateral wall exceeding the front end of the first rail;
• a second rail displaceable relative to the first rail;
• a mounting fitting comprising a connecting portion and a blocking portion;
• wherein when the second rail is located at a retracted position relative to the first rail and the connecting portion of the mounting fitting is detachably connected to the predetermined feature, the blocking portion of the mounting fitting blocks the second rail for preventing the second rail from displacing away from the retracted position in an opening direction.