Slide rail assembly and operation method thereof

A slide rail assembly, comprising:

• a first rail, and a first auxiliary member disposed on the first rail, the first auxiliary member including a disengaging portion;
• a second rail displaceable with respect to the first rail, the second rail including a synchronizing mechanism movably mounted thereon, wherein the second rail is provided with a working feature;
• a third rail displaceable with respect to the second rail, the third rail including a contact feature;
• and
• a switching member disposed on the third rail;
• wherein the switching member is configured to contact the working feature of the second rail when the third rail reaches a predetermined retracted position after being displaced from an extended position in a retracting direction, thereby allowing the third rail to displace the second rail to a predetermined position in the retracting direction, with the second rail displaced simultaneously with the third rail;
• wherein the third rail is configured to push the synchronizing mechanism via the contact feature and thereby displace the second rail from the predetermined position in an opening direction, with the second rail displaced simultaneously with the third rail;
• and when the second rail reaches a predetermined location after being displaced by, and simultaneously with, the third rail from the predetermined position in the opening direction, the disengaging portion of the first auxiliary member disengages the synchronizing mechanism from the contact feature.

A slide rail assembly, comprising:

• a first rail;
• a second rail longitudinally displaceable with respect to the first rail, the second rail being provided with a working feature, and the second rail being displaceable with respect to the first rail to a first extended position in an opening direction;
• a third rail longitudinally displaceable with respect to the second rail, the third rail being displaceable with respect to the first rail to a second extended position in the opening direction;
• a switching member configured to be operated and thereby switched between a first state and a second state, wherein by switching the switching member from the first state to the second state and displacing the third rail from the second extended position to a predetermined retracted position in a retracting direction, the switching member is brought into contact with the working feature of the second rail, the third rail thereby displaces the second rail to a predetermined position in the retracting direction, and the second rail being displaced simultaneously with the third rail;
• a first working member mounted on the third rail, wherein the first working member is switchable between a first working state and a second working state with respect to the third rail;
• the second rail is provided with a blocking portion;
• when the third rail is at the second extended position and the first working member is in the first working state, the first working member is located at one side of the blocking portion to prevent the third rail from being displaced in the opening direction with respect to the second rail at the first extended position;
• and
• once the first working member is operated and thereby switched from the first working state to the second working state, the third rail is allowed to be detached with respect to the second rail in the opening direction;
• and
• a second working member mounted on the third rail, wherein the second working member is switchable between a first working state and a second working state with respect to the third rail;
• when the third rail is at the second extended position and the second working member is in the first working state, the second working member is located at an opposite side of the blocking portion to prevent the third rail from being displaced in the retracting direction with respect to the second rail at the first extended position;
• and when the third rail is at the second extended position and the second working member is in the second working state, the third rail is displaceable in the retracting direction with respect to the second rail at the first extended position.