Patent ID: 8905470

Claim:
A seat unit comprising: a seat ( 6 ) and a backrest ( 61 ); a dining board ( 1 ) having a body ( 10 ) and an engaging portion ( 14 ) located on a top face ( 101 ) of the body ( 10 ); a reception member ( 3 ) connected to the backrest ( 61 ) and having a recessed area ( 34 ) defined therein and a hook ( 33 ) connected to the recessed area ( 34 ), two grooves ( 311 ) respectively defined in two inner sides of the recessed area ( 34 ), and a guide device having multiple operation members connected to the dining board ( 1 ) and slidably engaged with the grooves ( 311 ) of the recessed area ( 34 ) so as to slide the dining board ( 1 ) up and down, the reception member ( 3 ) located on a horizontal view level of a passenger behind the seat ( 6 ), the dining board ( 1 ) being received in the recessed area ( 34 ) of the reception member ( 3 ); wherein the operation members of the guide device comprises first guide unit ( 4 ) and a second guide unit, the first guide unit ( 4 ) comprises two links which are inserted into two slots ( 11 ) defined in the dining board ( 1 ), two respective lower ends ( 41 ) of the two links are respectively and pivotably connected to two respective top ends ( 51 ) of two legs ( 5 ), the two legs ( 5 ) are connected to two recesses ( 62 ) of the backrest ( 61 ), the second guide unit has the multiple operation members which are cooperated with the grooves ( 311 ) of the reception member ( 3 ), the multiple operation members are connected to a left side ( 105 ) and a right side ( 106 ) of the dining board ( 1 ).