| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bulb-type lamp capable of securing a necessary insulating distance without the need to make an insulation member intervene between a lighting circuit board and a heat sink. <P>SOLUTION: The bulb-type lamp 11 includes a housing 12 made of metal and formed by press-molding to be a cylinder shape widening and opening towards one-end side thereof. A synthetic-resin case 13, formed into a cylinder shape widening and opening towards one-end side arranged along an inner face of the housing 12, is arranged in the housing 12. A base 15 is mounted on the other end side of the case 13. A heat sink 17 with a light-emitting module 16 having a semiconductor light-emitting element mounted thereon is arranged on the one-end side of the housing 12. A lighting circuit 19 is housed within the case 13. The lighting circuit 19 includes a lighting circuit board 73 arranged longitudinally along a lamp-axis direction in the case 13. The lighting circuit board 73 is formed into a shape that has one-end side thereof widening along the inner-shape of the case 13, and is arranged at a position nearer to the base 15 side in the case 13. <P>COPYRIGHT: (C)2012,JPO&INPIT |
