To protect an antenna section, to clarify the insertion/removal of a top plate not to forget its insertion and to improve discrepancy awareness and operation of the insertion/removal in a heating device cooking food with an electric heater and microwaves.
A rotatable rotary antenna 21 is provided at a gap in a feed port 22 opened on the ceiling of a heating chamber 2, and a top plate A23 and a top plate B25 protecting the rotary antenna 21 are doubly formed at a gap below a rotary antenna section. When the top plate B25 is removed for periodic cleaning or inspection of the top plate B25, the deformation, damage on or spark at the rotary antenna 21 is not generated by the operation, no fatal failure occurs on major components, and the performance and quality durability as an apparatus can be sharply improved.
YAMAGUCHI MASAAKI
MORIKAWA HISASHI
ISHIGURO TOSHIYUKI
ORITA MASATOMO
MIZUTA ISAO
ITO TAKESHI
