| 摘要 |
<p>A facial mask assembly for use in providing a supply of air at pressure to the entrance of the airways of a person, the mask assembly comprising: a frame; a substructure (clip 3234) that is connected to the frame; and a cushion (3232) supported by the substructure, the cushion being formed at least in part from foam. The mask assembly is arranged to promote a rolling-in effect at least in selected regions of the cushion on application of force to the cushion in-use. The rolling-in effect being created by way of at least one of the following: the base of the cushion having a base surface which, in-use, extends at an angle (a2) with respect to a horizontal plane, the angle being arranged to vary along the circumference of the cushion, the angle facilitating, in use, the rolling-in effect; the base of the cushion having a base surface supportingly engaged by a supporting surface of the substructure, an inner circumferential edge of the supporting surface of the substructure being outwardly offset from an inner circumferential edge of the cushion, with the offset varying along the circumference of the cushion; and the outer side of the cross section of the cushion being longer than the inner side in at least a portion of the circumference of the cushion.</p> |
