A foot support device of a wheelchair is mounted on a wheelchair. The wheelchair comprises a seat having a pivoting part and a driving member disposed on the seat. The foot support device of the wheelchair comprises a linkage unit, a rotary shaft unit, and a slide unit. The linkage unit comprises a first link pivotally connected to the pivoting part and a second link pivoted to the first link. The rotary shaft unit comprises a spindle driven by the driving member and mounted to a front end of the seat to be rotatable about a first axis and an inner tube extending in the direction of a second axis direction perpendicular to the first axis and mounted to the spindle. The slide unit is fit over the inner tube to be movable along the second axis and connected to the second link, wherein the slide unit is movable between a received position and a stretched position relative to the spindle.一種輪椅之腳架裝置,安裝於一輪椅,該輪椅包括一具有一樞接部的椅座及一設置於該椅座的驅動件,該輪椅之腳架裝置包含一連動桿單元、一旋轉軸單元,及一滑動單元。該連動桿單元包括一樞設於該樞接部的第一連桿及一與該第一連桿樞接的第二連桿,該旋轉軸單元包括一受該驅動件驅動且沿一第一軸線可轉動地設置於該椅座前端的心軸,及一沿一垂直於該第一軸線的第二軸線方向延伸且設置於該心軸的內管,該滑動單元沿該第二軸線可移動地套設於該內管並與該第二連桿相連接,其中,該滑動單元可相對於該心軸於一收合位置與一伸展位置之間移動。100...輪椅11...椅座111...樞接部12...驅動件121...伸縮桿2...連動桿單元21...第一連桿22...第二連桿24...第三連桿3...旋轉軸單元31...心軸32...內管322...內導槽孔323...凸出部33...受力桿4...滑動單元41...外管412...外導槽孔42...套管43...腳管44...腳踏板
