This creation is a kind of related magnetic pressure regulating mechanism of turning deceleration of what, its be mainly disposed to turning with handlebar stem on, system includes upper and lower shell block, magnet base and Hall element, a wherein fixed Hall element in shell block on this, it is equipped with a locating part simultaneously, and the magnet base is equipped with the magnetic force piece of two different magnetic poles, and magnet base corresponds to handlebar stem rotation； Thereby, correspond to the curl distance of Hall element using magnetic force piece, and can appropriate adjustment turning when voltage output, person the effect of to control power source revolution.本創作係有關於一種轉彎減速之磁力調壓機構，其主要設置在轉彎用之把手桿上，係包含有上、下殼座、磁力座及霍爾元件，其中該上殼座內固設一霍爾元件，同時設有一限位件，而該磁力座上設有兩不同磁極的磁力件，且磁力座對應把手桿轉動；藉此，可利用磁力件對應霍爾元件的旋度距離，而能適當調整轉彎時的電壓輸出，以控制動力源轉數的功效者。
