Carrier device for monitor

A carrier device comprising:

• a supporting base including at least one column extended therefrom,
• a mounting seat for attaching to an object and including an arm extended from said mounting seat,
• a linkage including a bar having a first end and a second end,
• a first fastener including a non-circular shank engaged through said first end of said bar and said at least one column of said supporting base,
• a first disc including a non-circular bore formed therein for engaging with said non-circular shank said first fastener and for coupling said first disc to said first fastener and for preventing said first disc from being rotated relative to said first fastener,
• a second fastener including a non-circular shank engaged through said second end of said bar and said arm of said mounting seat,
• a second disc including a non-circular bore formed therein for engaging with said non-circular shank of said second fastener and for coupling said second disc to said second fastener and for preventing said second disc from being rotated relative to said second fastener, and
• a pair of levers disposed parallel to each other and attached to said bar of said linkage and having end portions pivotally coupled to said first disc and said second disc for forming a parallelogrammic structure and for stably supporting said mounting seat to said at least one column of said supporting base and for allowing said bar of said linkage to be rotated and adjusted relative to said at least one column of said supporting base to a selected angular position.