Seat device attached to baggage handcart

Claim 1

A seat device attached to a baggage handcart and comprising: a base attached to said baggage handcart and including two ends, each of said ends having a first passage defined perpendicularly therethrough and two rear legs respectively and securely extending through said two first passages, two frames each extending transversely from each one of said two ends of said base; a seat plate having a front end and a rear end, said rear end having two recesses defined therein so as to respectively and pivotally receive said frame therein, two lugs extending downwardly from a bottom of said front end, two first receiving members disposed to both sides of said bottom of said seat plate and a second receiving member disposed to said rear end of said bottom of said seat plate; a front leg having a first end pivotally connected between said two lugs and a second passage defined longitudinally therein which has a non-circular inner periphery defining said second passage and accessing to a second end of said front leg; a flexible block received in said second passage and having a slit defined therein which communicates with a periphery of said block, a receiving hole defined in said block and communicating with said slit, and a rod retractably received in said second passage and having a first end and a second end, said second end of said rod having an eccentric protrusion extending therefrom and said protrusion having a head formed on a distal end thereof wherein said protrusion has a diameter larger than a width of the slit and the same as a diameter of said hole and, said head has a larger diameter than said hole.