Rack system and slide rail mechanism thereof

A slide rail mechanism, comprising:

• a rail;
• a movable member longitudinally displaceable with respect to the rail, the movable member including a contact portion extending beyond a rear end of the rail;
• a buffer member provided on one of the rail and the movable member, wherein the buffer member is configured to produce a buffering effect in response to displacement of the movable member in a first direction;
• and
• an elastic member for applying an elastic force to the movable member, wherein the elastic force acts in a second direction, and the second direction and the first direction are opposite directions.

A rack system, comprising:

• a rack having a first side and a second side, wherein the first side is provided with a front post and a rear post, the second side corresponds to the first side, and the second side is provided with a front post and a rear post;
• a first rail including a front bracket and a rear bracket, wherein the front bracket and the rear bracket of the first rail are configured to be mounted on the front post and the rear post of the first side of the rack respectively;
• a second rail including a front bracket and a rear bracket, wherein the front bracket and the rear bracket of the second rail are configured to be mounted on the front post and the rear post of the second side of the rack respectively, each of the first rail and the second rail has a longitudinal wall and a supporting portion substantially perpendicularly connected to the longitudinal wall, and the first rail and the second rail jointly define a supporting space therebetween for receiving an object;
• and
• two buffer devices respectively provided on the first rail and the second rail, wherein each buffer device includes a base, a movable member, and a buffer member, each movable member is displaceable with respect to a corresponding base, and each movable member includes a contact portion corresponding to the supporting space and respectively extending beyond a rear end of a corresponding one of the first rail and the second rail;
• wherein while the object is being pushed into the rack, the object is brought into contact with the contact portion of each of the movable members, and the buffer members produce a buffering effect in response to displacement of the movable members in a first direction in order to decelerate displacement of the object in the first direction.