| 摘要 |
Discharge bulb 10 comprising an arc tube unit 12, pinch seal portions 20b1, 20b2 and lead 28B which is bent. The lead 28B may be bent in a zigzag, spiral or helical configuration and may be point symmetric. The bend or flexion may be formed by crimping between metal moulds. The bulb may comprise an insulating plug 14 for securing the arc tube unit 12 with a lead passage hole 40g and a terminal cap 42 for securing the end of the lead. The lead may be composed of molybdenum wire which is annealed and possesses an expansion property of 5-25%. A method of assembling an arc tube to an insulating plug where a lead including a bend or flexion extends from a rear pinch seal of the tube comprising: inserting the lead through a terminal cap on the plug unit, applying a tensile load to an end portion of the lead thereby expanding the flexion and securing the end portion of the lead to the terminal cap. Any portion of the lead that extends from the terminal cap may be removed and the lead may be secured to the terminal cap by laser welding. |
