| 摘要 |
PURPOSE:To make it possible to smoothly insert a heating element from the front surface of a main body and mounting the same on the main body by providing a cutaway in a side surface reflection plate through which a heating element can be inserted from the front surface of the main body. CONSTITUTION:A lamp type heating element 9 is inserted into a cutaway 17 provided in a side surface reflection plate 11 from the front surface of a main body 8, and thereafter held by a holding part 15a of a heater holding metal fitting 15 fitted in the cutaway 16 so as to cover the cutaway 16. Upon this occasion, when the rotation of left and right side surface reflection plates 11 is considered so that the heater sealing port 18 of the heating element 9 is located outside the side surface reflection plate 11, it serves as a high temperature prevention of the heater sealing part 18. As a result, fitting and replacement of the lamp type heating element 9 are extremely facilitated only by removing the heater holding metal fitting 15 without removing the side surface reflection plate.
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