| 摘要 |
A cup includes an air cushion, which has first and second plastic films, an elastic plate, a pressed component, and a short plastic film; the first film has an air inlet; the first and the second films are stuck together to form an air room between them; a flow guiding passage exists between the elastic plate and the first film to allow air to flow into the air room; the elastic plate has a recess portion, which can face a first direction to allow the cushion to be inflated, and which can face an opposite direction to allow the cushion to be bled; the pressed component is resilient and interposed between the air inlet and the recess portion, and can contain air therein; the short plastic film has a hole facing the recess portion, and an air outlet exists between the short film and the elastic plate.
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