STRUCTURE AND METHOD FOR AIRTIGHT INSPECTION OF DISPLAY SUBSTRATE UNIT FOR RICE COOKER

PROBLEM TO BE SOLVED: To improve the operability of of the airtight inspection of airtight space in a display substrate unit for a rice cooker which houses liquid crystal supported by a display substrate inside the airtight space formed by combining a cover panel and the outer periphery of a substrate cover air tight. SOLUTION: A hollow protrusion 23 communicating with the inside of the airtight space 8 is formed in the substrate cover 7 of the display substrate unit 4. A fragile part 25 which is easy to cut off is formed at a part of the hollow protrusion 23. In the case of being the subject of an inspection, the hollow protrusion 23 is cut off at the fragile part 25 to bore a hole 26 for the inspection, and the hole 26 is closed after finishing the inspection. In the case of being not the subject of the inspection, an inspection process is finished without cutting off the hollow protrusion 23. COPYRIGHT: (C)2005,JPO&NCIPI