| 摘要 |
PURPOSE:To form spiral wall easily by setting a number of laminated rectangular insulated small pieces shifted by an equal angle in succession, with the center as fulcrum. CONSTITUTION:The spiral wall of a fluorescent lamp is formed by combining a number of insulated small pieces 9. The insulated small pieces 9 are set-up on an closed element 10 and installed onto a bolt 2' arranged on the cylindrical 1 shaft of an one-end closed cylindrical lamp bulb 1'. In other words, a number of insulated small pieces 9 are laminated on the closed element 10 by inserting bolts 2' into a bolt insertion hole in succession, and said insulated small pieces 9 are piled up in spiral staircase form, slided little by little in the same direction, and from over the small pieces, a nut 11 is tightened onto the bolt 2', and a spiral wall is formed. |
