Patent ID: 7631935

Claim:
A seat device comprising: a seat assembly; a backrest assembly connected with the seat assembly; and a headrest assembly connected with the backrest assembly; the headrest assembly including: a headrest body having a plurality of first engaging portions; a headrest wing component having a second engaging portion, the second engaging portion being engageable with the first engaging portions such that a first angle is defined between the headrest wing component and the headrest body; and a first pivot being received within the headrest wing component and the headrest body by which the headrest wing component and the headrest body are pivotally connected; wherein the first angle can be altered by selectively engaging the second engaging portion with the first engaging portions such that a first value of the first angle when the second engaging portion is engaged with a first one of the first engaging portions is different from a second value of the first angle when the second engaging portion is engaged with a second one of the first engaging portions, wherein the headrest body has a first pivoting block through which a first hole passes, the headrest wing component has a second pivoting block through which a second hole passes, the first pivot is received in the first hole and the second hole, the first engaging portions are a plurality of grooves on the first pivoting block, and the second engaging portion is a rib adjacent to the second pivoting block.