| 摘要 |
PURPOSE:To reliably improve a thermal and mechanical strength of switch pin for realizing a heat-cooking utensil which can be used safely, by constituting a hollow swith pin such that it may be placed in position at the intersection of adjacent two sides of door frame body. CONSTITUTION:By providing a switch pin 9 with a cavity 14 and a wall thickness t2 smaller than that t1 of choke cover 8, the wall surface of switch pin 9 is resiliently deformed upon applying of external force F so as to prevent the breakage of its base portion. Moreover, by placing the switch pin 9 at position within a shaded area, the choke cover 8 may be located along the entire periphery of peripheral wall end portion of door so that the switch pin 8 may obtain a superior stability in the vertial plane and an extreme strength against a vertical load. The hollow and thinly walled switch pin 9 can ensure a good thermal conductivity even when the choke cover 8 and the switch pin 9 are made hot at their surfaces opposing against a heating compartment. Thus, the pin 9 can improve its heat radiation effect relative to a choke groove side and therefore its thermal resistance. In consequence, it is available to prevent a mechanical strength from being deteriorated due to a thermal effect. |
