| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To ensure fitting at a normal position, and eliminate necessity of a sophisticated and expensive determining device when a base for a circular fluorescent lamp is assembled. <P>SOLUTION: At a pin side base part 11, four pins are planted into the front face, and on the rear face, first and second protrusive grooves 1, 2 formed by varying the center position and the shape in the mutually facing direction from the center of the axis of the longitudinal direction are provided. On the other hand, at a non-pin side base part 12, a partition wall 24 is installed in the perpendicular direction to the axis of the longitudinal direction of the rear face, and in the center of the partition wall 24, a bolt fixing hole 23 is formed, and furthermore, first and second protrusions 3, 4 which are arranged by varying the center position and the shape in the mutually facing direction from that fixing hole 23, and are fitted into the first and second protrusive grooves 1, 2 are provided. Even if these base parts 11, 12 are piled in the reverse direction, the protrusions 3, 4 and the grooves 1, 2 are at the unsymmetrical position, and therefore, incorrect fitting can be prevented. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
