Abstract: An automatic inflation pump including a housing, an air inlet, an air outlet provided in the housing, a manual rotary switch, a sealing device located at the air outlet, an air pump provided inside the housing and a motor for driving the air pump. The manual rotary switch is provided thereon with a dovetail groove which includes a deep groove and two shallow grooves located at both sides of the deep groove. The sealing device includes a driving stem and an air sealing plate for sealing the air outlet. One end of the driving stem is connected with the air sealing plate. A spring is provided on the driving stem. One end of the spring is fixed on a free end of the driving stem and the other end of the spring is supported at the air outlet.

Abstract: Disclosed herein is an automatic inflation pump including a housing (1), an air inlet (2), an air outlet (3) provided in the housing (1), a manual rotary switch, a sealing device located at the air outlet (3), an air pump (4) provided inside the housing (1) and a motor (5) for driving the air pump (4). The manual rotary switch is provided thereon with a dovetail groove which includes a deep groove (10) and two shallow grooves (101) located at both sides of the deep groove (10). The sealing device includes a driving stem (11) and an air sealing plate (12) for sealing the air outlet (3). One end of the driving stem (11) is connected with the air sealing plate (12). When the other end of the driving stem (11) is located in the deep groove (10) of the dovetail groove, the air sealing plate (12) closes the air outlet (3); and when the other end of the driving stem (11) is located in the shallow groove (101) of the dovetail groove, the air outlet (3) is opened. A spring (15) is provided on the driving stem (11).