Lid construction for breathing apparatus

摘要

A breathing assistance apparatus has a lid and latch assembly configured for one-handed operation. The apparatus also includes a hinge assembly that separates when over-rotated but that reengages upon closing of the lid onto the main body of the apparatus.

主权项

1. A breathing assistance apparatus comprising:
a lid and a main body, the lid and the main body selectively enclosing a cavity configured to hold a body of liquid, the lid comprising a button member; and at least one hinge assembly comprising at least one post mounted to the lid and at least one support mounted to the main body, wherein the at least one support comprises a recess configured to receive at least a portion of the post, the at least one hinge assembly adapted to provide restraint against air pressure within the apparatus in use, wherein, when the lid is in an open position, the lid can be separated from the main body with application of a sufficient force without breakage of either the at least one support or the at least one post; wherein the at least one hinge assembly comprises a guide structure and cam structure, the guide structure and the cam structure configured to cause sliding movement of the at least one post during rotation of the post, wherein the guide structure comprises a recess configured to receive the cam structure such that the cam structure and the guide structure engage each other and resist detachment of the lid from the main body when the lid is in an at least partially closed position, and wherein when the lid is in the open position, the guide structure is sufficiently spaced from the cam structure such that the lid can be separated from the main body with application of the sufficient force; and wherein the guide structure comprises a guide surface, wherein in use the guide surface contacts the cam structure to move the lid from a detached state to an attached state relative to the main body via the sliding movement of the at least one post as a result of closing motion of the lid.