Slide rail mechanism

A slide rail mechanism, comprising:

• a rail member;
• a first supporting frame movable relative to the rail member;
• a second supporting frame movable relative to the first supporting frame;
• a first bracket configured to mount the slide rail mechanism to a post, the first bracket and the second supporting frame being movable relative to each other;
• and
• a reinforcing member movably mounted to the rail member and the first supporting frame;
• wherein the rail member comprises a first engaging structure, the reinforcing member comprises a second engaging structure, the reinforcing member is configured to be engaged with the first engaging structure through the second engaging structure;
• wherein when the reinforcing member is moved to a predetermined position relative to the rail member, the second engaging structure of the reinforcing member is engaged with the first engaging structure of the rail member;
• wherein the first bracket comprises a disengaging structure configured to disengage the second engaging structure of the reinforcing member from the first engaging structure of the rail member.