Return bend angular instrument

The utility model discloses a return bend angular instrument, including scale and movable auxiliary scale, the one end fixed mounting of scale has rotary encoder, rotary encoder's the other end pass through the screw with the one end fixed connection of lateral wall in the vertical orientation of movable auxiliary scale, adsorption component is installed to the bottom of scale, movable auxiliary scale last with the top fixed mounting of the terminal surface of scale top parallel has locating component, adsorption component specifically adsorbs the block group by two and becomes, a V type groove has been offered to the bottom of adsorbing the piece, the permanent magnet has been set to the bottom in a V type groove, the top of adsorbing the piece seted up with the corresponding draw -in groove in scale bottom, locating component specifically comprises two locating pieces, the 2nd V type groove has been offered at the top of locating piece, the utility model discloses can measure the contained angle between two