| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent backup data from being mistakenly erased by providing a three-step slide lever that restricts a lock state of main and auxiliary battery covers. SOLUTION: When a slide lever 1 is set to a release (main battery) position, a main battery cover is pressed clockwise and removed from a case 8, and a main battery can be replaced. At this time, since an auxiliary battery cover is locked so that is cannot be turned counterclockwise, the auxiliary battery cannot be replaced. When the lever 1 is set to a lock (when in use) position, both of the main and auxiliary battery covers are locked. Further, when the lever 1 is set to the release (auxiliary battery) position, the auxiliary battery can be replaced; however, the main battery cover is locked by an engagement part 7 and cannot be removed from the case 8. Thus, an operation step of the lever 1 is increased, a mechanism is added so that the lever 1 is actuated only when the main battery cover is mounted, whereby backup data can be prevented from being mistakenly erased.</p> |
