The design is a bending control structure at the end of the endoscope tube.The catheter is composed of tube bodies with different soft hardness.At least one section of the tail end part is an elastic bendable part.The rest is a support made of hard material.There is an axial through groove in the conduit.It is used for holding the control panel.The tail end of the control sheet is provided with an elastic part with a bending tendency to one side.The other end extends to the inside of the handle.Combined with a toothed strip,And a gear set is arranged at the handle.When turning the gear set at the handle,It can connect the toothed strip and the control plate.When the elastic part of the control sheet moves to the bendable part of the conduit,It can drive the bendable part to swing to one side.The end of the conduit is bent.When the control plate moves towards the handle end,Leave the bendable part in the elastic part.The bendable part will be supported by an unguided elastic pushing top.The recovery and support parts are straight.To control whether the end of the catheter is bent or not.本創作為一種內視鏡導管尾端彎折控制結構，該導管由不同軟硬度的管體所組成，其尾端部位至少設有一段為彈性可彎折部，其餘部份為較硬材質所形成的支撐部，於導管內部設有一軸向的貫穿槽，以供控制片容置其間，該控制片的尾端設為具有向一側彎曲傾向的彈性部，另端延伸至把手的內部，並結合以一齒狀條，而把手處設有齒輪組，當於把手處轉動齒輪組時，可連動齒狀條和控制片，在控制片的彈性部移動至導管的可彎折部時，便能帶動該可彎折部向一側擺動，達到使導管尾端彎曲之效果，而當控制片朝向把手端方向移動時，在彈性部離開可彎折部，該可彎折部便會在無導向彈力推頂支撐下，回復與支撐部為平直狀態，而達到控制導管尾端彎折與否之目的。
