Headgear tensioning for respiratory mask

A patient interface assembly configured to deliver pressurized gas to a patient's airways, the patient interface assembly comprising:

• a patient interface structure configured to sealingly engage the patient's face and including a receptacle;
• and
• headgear configured to support the patient interface structure on the patient's head, the headgear including a clip that is receivable by the receptacle,
• wherein the receptacle and the clip together form a multiple stage connection arrangement in which each of the multiple stages corresponds to an interlocked position of the clip in the receptacle, and
• wherein each stage is associated with a corresponding range of headgear tension.

A patient interface assembly configured to deliver pressurized gas to a patient's airways, the patient interface assembly comprising:

• a patient interface structure configured to sealingly engage the patient's face and including a receptacle;
• and
• headgear configured to support the patient interface structure on the patient's head, the headgear including a clip that is receivable by the receptacle,
• wherein the receptacle and the clip together form a two-stage connection arrangement in which a first stage corresponds to a first interlocked position of the clip in the receptacle and a second stage correspond to a second interlocked position of the clip in the receptacle, and
• wherein the first and second interlocking positions are arranged so that the two-stage connection arrangement must be in the first stage before entering the second stage.

A patient interface assembly configured to deliver pressurized gas to a patient's airways, the patient interface assembly comprising:

• a patient interface structure configured to sealingly engage the patient's face and comprising a receptacle with opposed sides that each includes an inward projection;
• and
• headgear configured to support the patient interface structure on the patient's head, the headgear comprising a clip that is receivable by the receptacle and inlcudes at least one spring arm having first and second projections that form first and second recesses,
• wherein the receptacle and the clip together form a two-stage latch arrangement that is in a first stage when the inward projections of the opposed sides of the receptacle are in the first recess,
• wherein the two-stage latch arrangement is in a second stage when the inward projections of the opposed sides of the receptacle are in the second recess.