| 摘要 |
<p>PURPOSE:To make it possible to load and unload an external enclosure in one easy step so that a projection of a fixing spring interlocks with a recession of the external enclosure elastically by crowning the internal enclosure with the external enclosure. CONSTITUTION:A projection 25 of a fixing spring 3 interlocks elastically with a recession 32 of an external enclosure 32 by crowing an internal enclosure 2 with the external enclosure 4. Accordingly, the external enclosure 4 can be fixed to the internal enclosure 2 without levitating the external enclosure 4, and the fixing spring 3 can be covered with the external enclosure 4. When a jig 28 is inserted into a jig insertion section 29 to punch a releasing push section 26 of the fixing spring 3, the external enclosure 4 can be released because the projection 25 comes off the recession 32. According to the constitution, loading and unloading of the external enclosure 4 can be made with one easy step.</p> |
