| 摘要 |
An inflation device has a housing, a check valve assembly, and a filtering cover. The check valve assembly is mounted inside the housing by threads, and the filtering cover covers an external wall of the housing. The check valve assembly has a body, a valve stem, a plate, a spring, and a first gasket. With resilience of the spring, the valve stem, the plate and the first gasket move axially inside the body for opening or closing the check valve assembly. The filtering cover prevents an inflatable mattress from air leakage caused by fiber blocking the check valve assembly. The filtering cover is detachably mounted in the housing for assembling flexibility according to demand. Since the diameter of each hole of the filtering cover is less than 2 mm, the fibers cannot pass through the holes to enter a passage of the body. |
