Air extraction structure and keep-fresh container having same

A keep-fresh container, comprising:

• an air extraction structure, comprising:
• an elastic press cover;
• a seat fastened to and in sealing connection with the elastic press cover, wherein an air extraction chamber is formed between the elastic press cover and the seat, the seat is provided with a mounting hole, and a plurality of air extraction holes are arranged in a circumferential direction of the mounting hole;
• a valve seat mounted on the seat, wherein the valve seat is provided with a receiving hole, and the receiving hole is communicated with the mounting hole and the air extraction hole;
• a blocking member comprising a flexible diaphragm and a clamping part vertically arranged on a lower surface of the flexible diaphragm, wherein the clamping part passes through the receiving hole and the mounting hole and is clamped and placed on a lower surface of the seat, the lower surface of the flexible diaphragm is able to be attached to an upper surface of the valve seat and blocks the air extraction hole, the blocking member is movable along an axial direction of the mounting hole to control the communication or disconnection between the air extraction chamber and the air extraction hole, the lower surface of the flexible diaphragm has a first reinforcing rib extending circumferentially, and the first reinforcing rib can be attached to the upper surface of the valve seat;
• and
• a second reinforcing rib on an edge of the flexible diaphragm extending around a circumferential direction of the flexible diaphragm;
• and
• an air exhaust check valve mounted on the seat and configured to exhaust air from the air extraction chamber;
• a container cover and a container body, wherein the container cover and container body are able to be in sealing connection;
• and
• the air extraction structure is sealed on the container cover, the container cover is provided with a communication hole, and the air extraction hole is communicated with the interior of the container body through the communication hole.

A keep-fresh container, comprising:

• an air extraction structure, comprising:
• an elastic press cover;
• a seat fastened to and in sealing connection with the elastic press cover, wherein an air extraction chamber is formed between the elastic press cover and the seat, the seat is provided with a mounting hole, and a plurality of air extraction holes are arranged in a circumferential direction of the mounting hole;
• a valve seat mounted on the seat, wherein the valve seat is provided with a receiving hole, and the receiving hole is communicated with the mounting hole and the air extraction hole;
• a blocking member comprising a flexible diaphragm and a clamping part vertically arranged on a lower surface of the flexible diaphragm, wherein the clamping part passes through the receiving hole and the mounting hole and is clamped and placed on a lower surface of the seat, the lower surface of the flexible diaphragm is able to be attached to an upper surface of the valve seat and blocks the air extraction hole, the blocking member is movable along an axial direction of the mounting hole to control the communication or disconnection between the air extraction chamber and the air extraction hole, the lower surface of the flexible diaphragm has a first reinforcing rib extending circumferentially, and the first reinforcing rib can be attached to the upper surface of the valve seat;
• and
• an air exhaust check valve mounted on the seat and configured to exhaust air from the air extraction chamber;
• and
• an inner surface of the elastic press cover is provided with a sealing rib along a circumferential direction of the elastic press cover, the upper surface of the seat is provided with a sealing groove at a position corresponding to the sealing rib, and the sealing rib is able to be inserted into the sealing groove when the elastic press cover is fastened on the seat;
• a container cover and a container body, wherein the container cover and container body are able to be in sealing connection;
• and
• the air extraction structure is sealed on the container cover, the container cover is provided with a communication hole, and the air extraction hole is communicated with the interior of the container body through the communication hole.