| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the illegal disassembly of a user, and to improve the failure analyzing property of a product by enabling a service man or the like to easily disclose a product in the case of maintenance, and detecting the history of disclosure by a product unit body. <P>SOLUTION: The conductive end top surface of a screw stop boss 101a projected from an electronic equipment casing 101 is brought into contact with a wiring pattern foil 105 on a circuit board 103, and the contact status is detected by a microcomputer 106 so that it is possible to detect that a screw 104 has come off. The detected data are stored in a non-volatile memory 107 so that it is possible to recognize a disassembly history by a means for displaying data on a PC picture 108. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
