Breast pumping system

A breast pumping system, comprising:

• a housing having a lower portion, a front side and a rear side;
• an air pump arranged inside the housing;
• a milk container arranged at the lower portion of the housing, having a storing chamber with a rear opening;
• a pipe arranged inside the storing chamber of the milk container, having a front side, a receiving chamber, a top port, a middle port and a lower port, the top port, the middle port and the lower port communicating with the receiving chamber, the middle port facing backward, the lower port communicating with the storing chamber;
• a diaphragm arranged inside the receiving chamber of the pipe and located between the top port and the middle port;
• a shield having a passage facing backward for receiving a nipple, the passage communicating with the middle port of the pipe, the shield covering the rear opening of the milk container;
• a cover arranged inside the storing chamber and located at the top port of the pipe, an air chamber being defined between the cover and the diaphragm, the cover having a vent pipe communicating with the air chamber and the air pump;
• wherein,
• the diaphragm has an opening and is at least partially distortable in shape and is capable of isolating air from the vent pipe from milk inside the receiving chamber of the pipe;
• when the air pump acts on the air chamber through the vent pipe, the diaphragm is distorted so as to form a negative pressure inside the receiving chamber of the pipe, accordingly the milk from the passage flows into the storing chamber of the milk container after passing through the receiving chamber and the lower port successively;
• the cover is detachably sealed to the diaphragm;
• the opening of the diaphragm has an edge which extends out of the pipe forming a bent portion surrounding the front side of the pipe;
• the vent pipe presses against the bent portion of the diaphragm when vertically disposed;
• the cover has an insertion portion extending backward from a bottom of the vent pipe, the insertion portion is inserted into the opening of the diaphragm, so that the air chamber is enclosed by the cover and the diaphragm;
• the diaphragm further has a hook portion extending backward from the bent portion, and the hook potion clamps to the periphery of the pipe the milk container has a vertical column in communication with the storing chamber;
• a sealing sleeve has an upper end and a lower end, the upper end of the sealing sleeve passes through the column to be sleeved outside an output end of the air pump and the lower end thereof is removably sleeved outside a periphery of the vent pipe, the sealing sleeve is sealed to a wall of the column and the vent pipe, respectively, and an edge of the lower end of the sealing sleeve presses against the hook portion.