| 摘要 |
PURPOSE:A device capable of easy change of the light distribution curve of lamps wherein a direction display control interlocked with a light controller is placed in the center of two or more lamps arranged along a circumference. CONSTITUTION:A suspension ctlinder in the center of lamps 3a-3d arranged along a circumference is fitted with a rotary switch 5 comprising a rotatable direction display control 4. With the control 4 rotated, a slider 9 (serving as a common terminal A) fitted on the rotary shaft 6 of the control 4 slidably contacts the fixed terminals 8a-8d arranged on an insulator plate 7 and connected with lamps, to form a lamp circuit or circuits; so that the lamp(s) corresponding to the direction of the control 4 is lighted and the other lamps are not lighted. When the control 4 is directed between two lamps, the slider contacts two terminals to light two lamps. Thus the number and direction of the lamp(s) lighted can be changed easily. |
