Support mechanism for slide assembly

A slide assembly includes a first rail (10), a second rail (12), an engaging member (14) and a resilient member (16). The first rail (10) includes an extension wall (34) and the second rail (12) is slidably connected to the first rail (10), and has a passage (40). The engaging member (14) is pivotably connected to the second rail (12), and has a first end (46) and a second end (48). The first end (46) includes a stop (50). The resilient member (16) is connected between the second end (48) of the engaging member (14) and the second rail (12) so as to provide a resilient force to the engaging member (14) so that the stop (50) of the first end (46) of the engaging member (14) is inserted into the passage (40) of the second rail (12) by the resilient force from the resilient member (16). The stop (50) is longitudinally located corresponding to the extension wall (34) of the first rail (10). When the second rail (12) is slid to a pre-set position relative to the first rail (10), the stop (50) of the engaging member (14) contacts the extension wall (34) of the first rail (10) to form a stop point.