Headgear for nasal masks

摘要

A nasal mask (501) is disclosed which is more comfortable for the user to wear and reduces side leakage as compared to masks of the prior art. In a first form headgear (502) for securing a mask to the user's face is disclosed where a section of at least one strap securing a mask to a user's face is substantially more elastic then the remainder of the strap. Headgear of this type allows the user to tilt the head backwards without lateral movement of the mask. In a further aspect, headgear tensioners (506,507) are disclosed which provides a preset fitting of the mask and ensures that a user cannot over tighten the straps. The tensioners are recalling tension devices attached to the straps and/or mask on either side of the mask. In another form the headgear tensioner is a strap attachment on either side of the mask that allows the straps to move back through the attachment to a predetermined position that provides an appropriate tension between the back of the user's head and mask. This limits the amount of leakage from the mask when the straps tighten or loosen as the user moves his/her head.