ROTARY TYPE IRRADIATING UNIT

PURPOSE:To facilitate and ensure supporting of a rotary plate of a rotary type irradiation unit, wherein the plate supports a reflex mirror and an electric bulb. CONSTITUTION:A cylindrical part to be supported 10 provided in the center of a rotary plate 8 is rotatably fitted on a cylindrical collar installed upright at a chassis 2 and having a flange 5 at the bottom, and a cylindrical shaft 12 supporting the bottom of a socket 16 is fitted on the top of this collar 4, wherein an electric bulb 7 is fitted in the socket 16 removably. A set spring 23 is detained with notches 7, 15 provided in the collar and shaft, and that part of rotary plate to be borne is supported by the flange and the shaft bottom while pinched thereby. The rotary plate can be supported rotatably by the collar in the optimum condition, i.e., not too tight and not too loose, as long as the dimension from the flange oversurface to the collar top, the dimension from the stopper edge 13 undersurface of the shaft to its bottom, and the length of that part of rotary plate to be born are formed precisely.