Slide rail assembly

A slide rail assembly comprising:

• a first rail;
• a blocking feature arranged on the first rail;
• a positioning feature arranged on the first rail;
• a second rail displaceable relative to the first rail;
• an auxiliary member arranged on the second rail, the auxiliary member comprising a resilient arm and a predetermined portion arranged on the resilient arm;
• a third rail displaceable relative to the second rail;
• a pivoting shaft;
• a blocking member;
• a positioning member, the blocking member and the positioning member being pivotally connected to the second rail by the pivoting shaft, the blocking member and the positioning member being movably switchable between a first state and a second state relative to the second rail, the blocking member comprising a blocking portion and an abutting portion, the pivoting shaft being located between the blocking portion and the abutting portion;
• and
• an operating member configured to operate the blocking member, and the operating member comprising an engaging feature;
• wherein when the second rail is located at a first extended position relative to the first rail, the blocking feature blocks the blocking portion of the blocking member in the first state for preventing the second rail from displacing relative to the first rail away from the first extended position along a retracting direction;
• wherein when the operating member moves from a first operating position to a second operating position, the abutting portion of the blocking member is driven by the operating member to switch the blocking member from the first state to the second state, such that the blocking feature does not block the blocking portion of the blocking member in the second state for allowing the second rail to displace relative to the first rail away from the first extended position along the retracting direction;
• wherein when the operating member is located at the second operating position, the engaging feature engages with the predetermined portion of the auxiliary member to retain the operating member at the second operating position;
• wherein when the operating member is located at the second operating position, the operating member is configured to retain the blocking member in the second state;
• wherein when the second rail is located at the first extended position relative to the first rail and the blocking member is in the second state, the blocking feature does not block the blocking member in the second state for allowing the second rail to displace relative to the first rail from the first extended position to a retracted position along the retracting direction.