| 摘要 |
<p>PURPOSE: A groove for inserting an O-ring is provided to maintain sealability when the O-ring is compressed and to tightly seal first and second parts by increasing a space where the O-ring can deform. CONSTITUTION: A groove for inserting an O-ring comprises curved side walls(111) and a bottom surface(112). The curved side walls are convexly formed toward the O-ring. The bottom surface is connected to the curved side walls. The curved side walls and the bottom surfaces are formed in a first part with a depth shallower than the diameter of the O-ring. One side of the first part facing a second part is opened.</p> |
