| 摘要 |
PURPOSE:To enable materialization of a highly safety device for opening and closing a door, by making a device into such a simple construction that an electric power source for an electric motor is turned off before the door is closed completely, and after that closing action of the door is completed by tension of a spring installed on a door arm. CONSTITUTION:A door 8 which opens and closes by making a hinge 12 provided in the vicinity of the bottom of the inside of a main body housing 1 into a fulcrum is provided to open and close an opening part of a heating chamber 3 provided inside the main body housing 1. An arm 14 which is connected with a position of the door 8 located between the top face of the door 8 and the hinge part 12 so that a setting angle of an opening and closing direction of the door against the door becomes free. Then, a spring 18 which acts in a closing direction of the door 8 between the arm 14 and the main body housing 1 in the main body housing 1 is provided, an electric motor 20 is provided in the main body housing 1, and the door 8 is opened and closed by the electric motor 20 through the arm 14. In a course of closing the door 8, an electric power source for the electric motor is turned off by a switch 27 before the door 8 is closed completely, in that high-frequency heater. |
