| 摘要 |
An exhalation valve assembly for a wearable protective device (such as a respiratory mask) comprises a valve support (1b, Fig 2) for, in use, receiving a valve member (3, Fig 2), a valve cover 4 and a releasable mounting mechanism for releasably mounting the valve cover to the valve support so as to substantially cover the valve member. The mounting mechanism is a bayonet locking mechanism with a first part 110 located on the valve support and a second part 20a, 20b, 20c located on the valve cover; the two parts being configured to engage in a locked configuration when the cover is rotated, in use, relative to the support from an unlocked configuration. |
