摘要 |
PURPOSE:To obtain the safety device for a door switch, inexpensive in the cost, excellent in the durability and high in the productivity thereof, by a method wherein a switch lever, a hook and a switch fixing part, fixing a microswitch, are formed integrally by a resin. CONSTITUTION:The wafety device, provided at the front opening of a heating chamber is constituted by forming the hook 4, the lever 6 and the switch fixing part 11, fixing the microswitch 8, integrally by the resin and fitting the microswitch thereinto. The lever 6 is swing about a supporting part A and the configuration thereof is designed so that a switch operating part B pushes the actuator 9 of the microswitch 8 and the head part C is pushed by a door key 3. According to this constitution, a load necessary to operate the microswitch 8 by the door key 3 is lightened and the operation of the door key 3 is facilitated. The amount of movement of the lever near the supporting part A, which is the supporting point of the lever, is reduced and the durability against repeated bending of the lever 6 of resin may be improved remarkably by bending the slanted part F of the lever 6 and reducing the thickness of the second thin thickness part E thereof. |