Slide rail assembly and slide rail kit thereof

A rack system, comprising:

• a rack;
• a carried object;
• and
• a plurality of slide rail assemblies arranged on one side of the carried object and configured to mount the carried object to the rack, each of the slide rail assemblies comprising:
• a first rail comprising a blocking feature;
• a second rail movable relative to the first rail and configured to carry the carried object;
• a third rail configured to be mounted to the rack;
• a working mechanism and an engaging member arranged on the second rail, wherein the engaging member comprises an engaging part;
• and
• an operating member arranged on the second rail and configured to drive the working mechanism, the operating member comprising an auxiliary feature;
• wherein the first rail is movably mounted between the third rail and the second rail, and the first rail is configured to extend a moving distance of the second rail relative to the third rail;
• wherein the working mechanism comprises a pair of working members pivotally connected to the second rail, the pair of working members are configured to be held at a first state in response to elastic force of at least one elastic feature;
• wherein when the operating member is located at a first operating position, the working mechanism is in the first state and corresponding to the blocking feature of the first rail;
• when the operating member is located at a second operating position, the working mechanism is in a second state and not corresponding to the blocking feature of the first rail;
• wherein when the second rail is moved relative to the first rail along an opening direction to an extended position and when the operating member is located at the first operating position, the working mechanism and the blocking feature are configured to block each other;
• wherein when the operating member is located at the second operating position, the working mechanism and the blocking feature no longer block each other such that the second rail is movable relative to the first rail from the predetermined position along the first predetermined direction to be detached from the first rail or along a second predetermined direction opposite to the first predetermined direction to be retracted relative to the first rail, and the auxiliary feature of the operating member is configured to engage with the engaging part of the engaging member in order to hold the operating member at the second operating position.

A slide rail kit, comprising:

• a slide rail;
• a working mechanism and an engaging member arranged on the slide rail;
• and
• an operating member;
• wherein when the operating member is moved from a first operating position to a second operating position, the working mechanism is driven by the operating member to switch from a first state to a second state;
• wherein when the operating member is located at the second operating position, the operating member is engaged with the engaging member without the engaging member providing an elastic force to the operating member toward the first operating position, in order to stop and hold the operating member at the second operating position by the engaging member to further hold the working mechanism at the second state.