Supporting device for supporting an article thereon

A supporting device for supporting an article thereon, comprising:

• a first part that is formed with upper and lower retaining grooves;
• a second part that is adapted to support the article and that is formed with an upper hook extending into said upper retaining groove in such a manner that said second part is pivotable relative to said first part between first and second positions, said second part being further formed with a lower hook that is disposed in said lower retaining groove when said second part is disposed at said first position, and that is disposed outwardly of said lower retaining groove when said second part is disposed at said second position;
• and
• a locking member mounted movably in said lower retaining groove and engageable releasably with said lower hook when said lower hook is disposed in said lower retaining groove, thereby retaining said second part at said first position,
• wherein said locking member includes a generally L-shaped plate having a hook end and movable between an upper position, in which said hook end engages said lower hook when said second part is disposed at said first position, and a lower position, in which said hook end disengages said lower hook, and
• wherein said locking member further includes a pair of urging members mounted in said lower retaining groove underneath said L-shaped plate for urging said L-shaped plate to said upper position.