The invention provides a lip external type tooth lateral fixing device used for a tongue back elastic traction device. The lip external type tooth lateral fixing device comprises a supporting frame, an elastic traction body tooth lateral connection mechanism and a tooth lateral fixing mechanism, wherein the supporting frame of the lip external type tooth lateral fixing device is in an arch-shaped triangular supporting structure the supporting frame is not in contact with sensitive tissues including lips and the like in a process of elastically pulling a tongue back the lip external type tooth lateral fixing device has the advantages of stability in supporting and light weight and meets the requirements of human biology particularly, when the lip external type tooth lateral fixing device is provided with an adjusting mechanism for adjusting the size of a traction force, the traction force can be conveniently adjusted through spinning and rotating a ratchet wheel.本發明之一種用於舌背彈性牽引裝置的唇外式牙側固定器,包含支撐架、彈性牽引體牙側連接機構及牙側固定機構。唇外式牙側固定器的支撐架呈拱形的三角形支撐結構,在對舌背進行彈性牽拉的過程中,支撐架不與唇等敏感組織接觸,具有支撐平穩,重量輕的優點,符合人體生物學要求。特別是當本發明之唇外式牙側固定器含有可調節牽拉力大小的調節機構時,通過旋轉轉動棘輪,可以方便地調節牽拉力的大小。31‧‧‧支撐架31-4‧‧‧唇外固定支撐架32‧‧‧彈性牽引體牙側連接機構32-1‧‧‧定位凹槽32-2‧‧‧定位凸階33‧‧‧牙側固定機構
