Air pump device

An air pump device comprising:

• an air generating mechanism including an air generating unit, and a linking unit connected to said air generating unit;
• an air tube unit;
• an air cylinder including:
• a cylinder body that has an air-receiving space, and an air channel being in fluid communication with said air-receiving space, and
• a valve unit that is operable for opening and closing said air channel;
• and
• a control mechanism including:
• a manifold seat that interconnects said linking unit of said air generating mechanism and said air tube unit, said air cylinder being removably connected to said manifold seat, and
• a control unit that is mounted to said manifold seat and that is convertible between an air-storing position, where air advanced from said linking unit into said manifold seat is limited to flow into said air channel, and said valve unit is urged by pressure of the air to open so as to allow entrance of the air into said air-receiving space of said air cylinder, and an air-pumping position, where air advanced from said linking unit into said manifold seat is limited to flow into said air tube unit for output to inflate an object;
• wherein said manifold seat has
• a main tube that defines a main channel, and that has a coupling segment,
• an inlet channel that is connected between said main channel and said linking unit, and
• a tube-connecting channel that is connected between said main channel and said air tube unit;
• and
• wherein said control mechanism further includes a coupling ring unit that is coupled to said coupling segment of said main tube, said cylinder body of said air cylinder being coupled removably to said coupling ring unit.