| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce workloads for removing inner cases deeply engaged into mutual cracks into one each before assembly of inner cases with the cracks into the outer cases. <P>SOLUTION: An inner case 30 is formed with a diameter larger than an inner diameter of an outer case at a free state, after reducing the diameter to be inserted into the outer case, becomes a pressure-contact state to the inner wall of the outer case by elastic return force. A crack Q of the inner case 30 includes: a first straight part Q1 on both ends of the axis direction; a second straight part Q2 in the middle of offset in the circumferential direction to the first straight part Q1; and an inclination part Q3 between both, even when other inner case 30 attempts to enter the second straight part Q2 from the first straight part Q1, the other inner case 30 is blocked at the inclination part 30, and even when the inner cases 30 are sometimes engaged into mutual cracks, engagement is limited to the first linear parts Q1. Thus, since inner cases 30 are not deeply engaged into each other, even the engaged inner cases 30 can be easily separated into each one only by slightly whisking off. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
