Rubber gasket for fuel cell

摘要

A rubber gasket for a fuel cell is interposed between a first member and a second member stacked in the fuel cell. The fuel cell includes: a seat portion arranged on a surface of the first member; and a lip portion that includes a first hill portion projecting from the seat portion toward the second member and having a curved surface with a first curvature radius and a second hill portion projecting from the first hill portion toward the second member and having a curved surface with a second curvature radius smaller than the first curvature radius, and that makes elastic contact with the second member. The seat portion includes a planar inclined surface inclined with respect to the surface direction at a connecting portion leading to a bottom of the first hill portion.

主权项

1. A rubber gasket for a fuel cell, the rubber gasket having a frame shape and interposed between two members stacked in the fuel cell, a direction in which the two members are stacked being a stacking direction, a direction orthogonal to the stacking direction being a surface direction, one of the two members being a first member, and the other member being a second member, the rubber gasket for a fuel cell comprising:
a seat portion arranged on a surface of the first member; and a lip portion that includes: a first hill portion projecting from the seat portion toward the second member in the stacking direction and having a curved surface with a first curvature radius; and a second hill portion projecting from the first hill portion toward the second member in the stacking direction and having a curved surface with a second curvature radius smaller than the first curvature radius, and that makes elastic contact with the second member, wherein the seat portion has a planar inclined surface inclined with respect to the surface direction at a connecting portion leading to a bottom of the first hill portion, and a center of curvature of the first hill portion does not lie on a central axis of the second hill portion, the central axis being a perpendicular line drawn from a center of curvature of the second hill portion to the first member, wherein both the curved surface of the first hill portion and the curved surface of the second hill portion are convex with respect to the central axis of the second hill portion.