Seal structure for flow-path connection part

摘要

A seal structure for a flow-path connection part is aligned easily. In a seal structure for a flow-path connection part including a pair of flanges arranged to face each other, the seal structure includes a gasket having protrusions provided symmetrically on front and back sides of the gasket at an outer periphery thereof or near the outer periphery, and flanges each having a receiving groove provided annularly in a connected surface thereof. The receiving groove is wider than the protrusion and it has an arc-shaped deepest portion against which a top portion of the protrusion abuts, and the top portion of the protrusion has a curved surface formed such that the curvature of the top portion is greater than or equal to the curvature of the deepest portion of the receiving groove. A liquid ejection device and a liquid storage container can include the seal structure.

主权项

1. A seal structure for a flow-path connection part including a pair of flanges arranged to face each other, the seal structure comprising:
a gasket having protrusions provided symmetrically on front and back sides of the gasket at an outer periphery thereof or near the outer periphery; and the flanges each having a receiving groove provided annularly in a connected surface thereof, wherein the receiving groove is wider than the protrusion and has an arc-shaped deepest portion against which a top portion of the protrusion abuts, and the top portion of the protrusion has a curved surface formed such that the curvature of the top portion is greater than or equal to the curvature of the deepest portion of the receiving groove, wherein a curved surface that forms the arc-shaped deepest portion within the receiving groove being less than a curved surface that forms the entire receiving groove provided in the connected surface, the curved surface of the protrusion abuts less than the entire curved surface of the receiving groove.