A kind of cutter head can swing positioning shearing tool structure,It includes: a cutter head,One pivotal part,One pivot connector and a control device,Wherein the pivotal part is equipped with an interconnecting piece and a turntable,The interconnecting piece connects in conjunction with cutter head,The turntable top surface is equipped with two semicirculars to connect and rises inclined-plane,First teeth portion of circle is equipped at the turntable bottom surface proximal edge,An articulated section is arranged in the pivot connector one end,The articulated section top surface posts the turntable bottom surface of what pivotal part,The second teeth portion that a circle can engage with above-mentioned first teeth portion is equipped at the articulated section top surface proximal edge,The control device,Group is set between what pivotal part and pivot connector,Include a control piece,One screw rod,One nut and an elastic component,The turntable top surface of what pivotal part is arranged in the control piece system,The control piece bottom surface is equipped with two semicirculars that connect and climbs inclined-plane,And can by the switching of the control piece,Reach limitation or lift restrictions pivotal part and cutter head rotation； Thereby,It is easy to use and operate in order to reaching,And manufacturing cost is low.一種刀頭可旋擺定位之剪具結構，其包含：一刀頭、一樞轉件、一樞接頭及一控制裝置，其中該樞轉件設有一連接部及一轉盤，該連接部與刀頭結合連接，該轉盤頂面上設有相接之兩半環狀頂高斜面，該轉盤底面近邊緣處設有一圈第一齒部，該樞接頭一端設置一樞接部，該樞接部頂面貼置於樞轉件之轉盤底面，該樞接部頂面近邊緣處設有一圈可與上述第一齒部卡合之第二齒部，該控制裝置，組設於樞轉件與樞接頭間，包含有一控制件、一螺桿、一螺帽及一彈性件，該控制件係設置於樞轉件之轉盤頂面，該控制件底面設有相接之兩半環狀爬升斜面，而可藉由該控制件之扳轉，達到限制或解除限制樞轉件與刀頭旋轉；藉此，俾達使用操作方便，並且製造成本低。
