| 摘要 |
<p>A device for inflating air and releasing air includes a pump seat (4), a panel (3), a pump and a knob (9). An air hole (41) is located on the pump seat (4), and the pump connects with a valve. The valve includes an airway switcher (11), a sleeve (12), upside and downside valve plates (14, 15), and a sealing pad (16). A spring (13) is placed between the upside valve plate (14) and the airway switcher. Two air chambers (23) are located in the airway switcher (11), the air chambers are communicated with the room in the pump and the outside via airholes respectively. The device has simple structure, improves the sealing property, and reduces probability of leakage.</p> |
