One kind having the wheelchair idler wheel of directional locking,Comprising: a roller structure,The roller structure rotates one wheelchair of axis connection through one,A sticking department and a sensing unit are provided on the idler wheel,The sticking department offers a connecting hole； One fixed device,The fixation device have a sleeve,One trip,One elastic element and a close switch,The trip is mounted slidably the inside of the what sleeve through the elastic element,Expose the what sleeve in the trip one end； And one power pressing device setting the what trip above,Wherein when the idler wheel turns to fixed device lower section suitably place,The physical message close to inductive switching to the sensing unit,Just transmitting message is to the power pressing device,The power pressing device push the trip be caught in the sticking department connecting hole make the idler wheel fixed party to.一種具有方向鎖定裝置之輪椅滾輪，其包括：一滾輪結構，該滾輪結構透過一旋轉軸連接一輪椅，該滾輪上設置有一鎖定部與一感應單元，該鎖定部開設有一卡合孔；一固定裝置，該固定裝置具有一套筒、一卡榫、一彈性元件以及一接近開關，該卡榫透過該彈性元件可滑動地設置於該套筒之內部，該卡榫一端露出於該套筒；以及一動力推壓裝置設置於該卡榫上方，其中當該滾輪轉動至固定裝置下方適當處時，該接近開關感應到該感應單元之物理性訊息，便傳遞訊息至該動力推壓裝置，該動力推壓裝置推壓該卡榫卡入該鎖定部之卡合孔使該滾輪固定一方向。
