One extracting coffee machine parts

The present invention relates to a coffee machine of the extraction parts, including an organism, comprising: a body composed of an outer housing and an inner housing having a cavity and a cavity communicating with the inlet passage on the outer housing, the inner housing through the opened front end face of the housing outlet passage, the outlet passage equipped with the check valve assembly within the housing restraint cavity in the outer housing and slide forward and backward, the rear end surface of the cavity within the housing a gap exists between the bottom surface activity, a seal ring between the housing inner wall and the outer periphery of the cavity. This extraction depends not only on the locking force of the driving parts of the sealing structure, but also through the hot water extraction pressure used for sealing the auxiliary propulsion, when extracted, is present between the bottom surface of high pressure hot water into the housing rear end surface of the cavity activity gap, the inner housing pushes forward pressing or other mechanical extracted coffee pods, the extraction chamber to ensure an effective seal.