Assembly comprising a styling tool and a collecting device

Assembly comprising:

• a straightening iron to be moved along a lock of hair to which water in a liquid form and/or a cosmetic composition in a liquid or foam form has been applied, the straightening iron comprising:
• a bottom jaw and an upper jaw connected together by a hinge, the bottom jaw and the upper jaw being able to move relative to one another between a moved-together configuration for treating the hair and a spaced-apart configuration for inserting the hair to be treated between said jaws, and
• at least one heating plate disposed on one of the bottom and upper jaws and intended to come into contact with the hair while the bottom and upper jaws are in the moved-together configuration, and
• a collecting device coupled to the bottom jaw so as to collect a liquid or foam runoff generated during the movement of the straightening iron over the hair on account of the presence of water and/or said composition on the hair, the collecting device comprising:
• a reservoir for picking up the runoff, the reservoir comprising an opening for collecting the liquid or foam runoff in the reservoir, the reservoir being closed except for the opening that collects the liquid or foam runoff in the reservoir,
• a fastening system to couple the collecting device in a removable manner to the bottom jaw, and
• a grating disposed on the reservoir in the opening,
• the reservoir extending along the straightening iron, on a lateral side of the bottom jaw that is downstream of the heating plate with regard to a direction of movement of the straightening iron over the lock of hair, and laterally relative to the bottom and upper jaws.