| 摘要 |
PROBLEM TO BE SOLVED: To provide a readily handled, simple and effective manufacturing method for an electric lamp bulb of U-shape in section and also a simple and effective method to fix the bulb on a base case by installing the folded fluoresecent tube to be connected inside the peripheral opening of the base case. SOLUTION: The electric lamp bulb 1 is formed by the synthetic resin containing a coloring agent. The gate-trace 11 formed during the processing is set inside the bulb to make the outside smooth. Further, the claw-portion 12 is formed outside around the peripheral opening portion of the bulb 1, which is adapted to the concave portion 32 inside the peripheral opening of the base case 3. |
