Full face respirator mask

A full face respirator mask, comprising:

• a base including a base plate suitable for covering a face of a user, a front protruding portion extending forwardly from a front portion of said base plate, an air inlet extending through said front protruding portion and said base plate in a front-rear direction, a plurality of connectors connected to said base plate for engagement with a head strap unit, and an assembling ring disposed on a rear peripheral edge of said base plate and extending rearwardly from said base plate, said assembling ring having a plurality of engaging grooves that open rearwardly;
• and
• a flexible interface detachably assembled to said base and including a ring-shaped mounting portion connected to said assembling ring, and an abutment portion connected to and extending rearwardly from a periphery of said mounting portion and suitable for abutting against the face of the user, said mounting portion having a ring-shaped embedding groove that is formed in a front peripheral edge thereof, that opens forwardly and that receives said assembling ring;
• wherein said engaging grooves provide a required deformation space of said base plate such that said base plate flexes rearwardly when said connectors are pulled rearwardly.