PURPOSE: To promote the lightening of a body and a reduction of the assembling manhour of a seal member by sealing a seal part between the body and an interconnecting hold with a rubber bush.
CONSTITUTION: A ball press-in part structure is composed of a ball 2 sealing an interval between a body 1 and an interconnecting hole 8, silicone rubber protecting this ball 2 from the outside air while sealing an interval between the body 1 and the hole 8. Then, a rubber bush 3 provided with a recess 10 is inserted into a surface being opposed to the side of the ball 2 through the hole 8 from the outside of the ball 2. Owing to action of the rubber bush, depth of the interconnecting hole 8 is made holdable to the minimum, excess thickness in the body can be cut down into being lightweight and, moreover, assembling manhour for the rubber bush is reducible.
KOJIMA SEIICHI
HOSODA TOMOHIKO
