A wheelchair includes two pedal mechanisms mounted on a chair frame mechanism.Each pedal mechanism includes a pedal unit and a control unit mounted on an extension tube thereof.The control unit comprises a control rod pivoted on its shell and capable of being operated by the front and rear pivots, a driving wheel fixedly connected to the control rod, an extension pin arranged in the extension pipe and driving the main driving rod connected to the driving wheel, and a connecting rod pivoted on the pedal unit and driving the main driving rod.When the control lever changes from the lower position to the upper swing position, the driving wheel will be turned by the linkage pivot to drive the main drive lever and the linkage lever to rotate, and then the linkage pedal body will pivot from the yaw state to the straight swing state.Through the structural design of the pedal mechanism, it is convenient for users to control and adjust the pedal body in normal sitting posture. It is an innovative and practical structural design of wheelchair.一種輪椅，包含兩個安裝於椅架機構的踏板機構。每一踏板機構包括安裝於其延伸管之踏板單元與操控單元。操控單元包括一樞設於其殼體而能被前後操作樞擺之操控桿、一固接於操控桿之傳動輪、一延伸樞設於延伸管中並傳動連結於傳動輪之主傳動桿，及一樞設於踏板單元並傳動連結於主傳動桿之連動桿。當操控桿自下放位置變化至上擺位置時，傳動輪會被連動樞轉而傳動主傳動桿與連動桿旋轉，進而連動踏板本體自橫擺狀態往上樞擺至直擺狀態。透過踏板機構之結構設計，可方便使用者以正常坐姿方式操控調整踏板本體，是一種創新實用的輪椅結構設計。
