Endoscopic light guide device, endoscope and riveting tool

The utility model provides an endoscopic light guide device, an endoscope and a riveting tool. The endoscopic light guide device comprises an insertion part, a light guide part and a riveting part, and an optical fiber penetrating the insertion portion, the optical fiber including: an optical fiber body; the light scattering part integrally extends from the far end of the optical fiber line body to protrude out of the far end face of the insertion part, the surface of the far end of the light scattering part is a convex curved surface, and the axial projection area of the light scattering part is larger than the axial projection area of the optical fiber line body, so that the loss of transmitted light is small while the endoscopic light guide device diffuses emergent light. 本实用新型提供一种内窥导光装置及内窥镜、铆制工具，该内窥导光装置包括：插入部；和光纤，贯穿插入部，光纤包括：光纤线体；以及散光部，自光纤线体的远端一体延伸以突出插入部的远端面，散光部的远端表面为凸曲面，散光部的轴向投影面积大于光纤线体的轴向投影面积，以使得内窥导光装置在实现对出射光的扩散的同时所传输的光损失较少。