Mounting appratus for slide rail

A mounting apparatus for mounting a slide rail to a rack post, the rack post defining a through hole, the mounting apparatus comprising:

• a supporting bracket fixed to the slide rail, the supporting bracket comprising an end plate and an inserting pin extending from the end plate to extend through the through hole of the rack post;
• a locking member slidably coupled to the supporting bracket between a locking position where the locking member abutting against a side of the rack post opposite to the end plate of the supporting bracket to prevent the inserting pin from disengaging from the through hole of the rack post, and an unlocking position where the locking member moves away from the rack post to enable the inserting pin to disengage from the through hole of the rack post;
• and
• a holding mechanism comprising at least one holding plate mounted to the supporting bracket, and a resilient pressing tab integrally extending from one of the at least one holding plate and comprising a pressing portion resisting against the at least one holding plate;
• wherein the at least one holding plate is movable between a first position where the at least one holding plate abuts against the locking member to prevent the locking member from sliding relative to the supporting bracket, and a second position where the at least one holding plate disengages from the locking member, the pressing tab biases the at least one holding plate towards the first position;
• and
• wherein the locking member comprises a sliding bracket slidably engaging with the supporting bracket, and a positioning pin secured to the sliding bracket, the at least one holding plate comprises a first holding plate, a second holding plate, and a third holding plate, the first holding plate comprises a first engaging portion, the second holding plate comprises a second engaging portion closer to the end plate of the supporting bracket than the first engaging portion, the third holding plate comprises a third engaging portion closer to the end plate of the supporting bracket than the first engaging portion, one of the first engaging portion, the second engaging portion, and the third engaging portion abuts against the positioning pin to prevent the sliding of the locking member.