Coupling assembly and bracket device thereof

A bracket device, comprising:

• a bracket;
• a fastening member movably mounted on the bracket and including a first supporting portion;
• a supporting frame including a second supporting portion, wherein once the supporting frame is operated and thereby displaced with respect to the bracket to a first position, the second supporting portion of the supporting frame supports the first supporting portion of the fastening member such that the fastening member is in a particular position;
• and once the supporting frame is operated and thereby displaced with respect to the bracket to a second position, the second supporting portion of the supporting frame does not support the first supporting portion of the fastening member such that the fastening member is no longer in the particular position;
• and
• a fitting;
• wherein when the fitting is at a predetermined position on the supporting frame, the supporting frame is prevented from being displaced with respect to the bracket from the first position to the second position;
• and
• wherein when the fitting is not at the predetermined position, the supporting frame is allowed to be displaced with respect to the bracket from the first position to the second position.

A coupling assembly adapted to be mounted to a post, the coupling assembly comprising:

• a slide rail mechanism;
• and
• a bracket device coupled to the slide rail mechanism, wherein the bracket device includes:
• a bracket provided with a mounting member in order to be mounted to the post;
• a fastening member displaceable to either an unlocked position or a locked position by operation;
• and
• a fitting;
• wherein when the fitting is at a predetermined position, the fastening member is prevented from being displaced from the unlocked position to the locked position;
• and
• wherein when the fitting is not at the predetermined position, the fastening member is allowed to be displaced from the unlocked position to the locked position and thereby fasten the bracket to the post.