| 摘要 |
<p>PURPOSE:To provide the subject structure wherein the rise in the sealed atmospheric pressure in the slide-fitting part is reduced by specific configurations of main slide pin and boot. CONSTITUTION:When a main slide pin 3 is pressed in the largest inserting position, the tapered surface 3b of a flange 3a expands the lip seal 10c of one end part 10a of the boot. A first part 12 and a second part 13 are communicated with each other through a concave flow path 3c of a tapered surface 3b of the pin 3 and a concave flow path 10d of the boot lip seal 10c, and since the first part 12 has a relatively large capacity and further a bellow part 10f has sufficient expansibility in diametral and axial directions, the rise in the atmospheric pressure of the second part 13 within a cylindrical part 6 escapes to the second part.</p> |
