ELECTRIC DISCHARGE TUBE, FERRULE, AND ILLUMINATING DEVICE, DISPLAY, AND TV RECEIVER WITH SAID DISCHARGE TUBE

摘要

A ferrule 50 includes a body 51 having a cylindrical shape. Elastic gripping parts 54 are provided on the body 51 so as to bulge radially inwardly. The elastic gripping parts 54 can have elastic contact with the outer circumferential surface of a glass tube 40. The body 51 of the ferrule 50 is mounted to the glass tube 40 via the elastic gripping parts 54 capable of elastic and radial deformation. Thereby, the variation in outer diameter of the glass tube 40 can be absorbed, and therefore the dimensional control with high precision is not required for glass tubes 40 at the time of manufacturing. This leads to cost reduction.