Mask apparatus

A mask apparatus comprising:

• a mask body including:
• a front body, and
• a rear body that is coupled to a rear surface of the front body, wherein a pair of accommodation portions protrude from the rear body;
• a face guard that is coupled to a rear surface of the rear body, the face guard being configured to contact a user's face and defining a breathing space therein;
• a fan module seated in an accommodation portion of the pair of accommodation portions;
• a flow guide provided at a rear surface of the fan module and defining a portion of a discharge port configured to communicate with the breathing space;
• a filter seated on the flow guide;
• a filter housing that is rotatably coupled to the rear body and configured to cover the filter;
• and
• a filter hook configured to couple to the filter housing,
• wherein the flow guide includes:
• a mount plate covering a rear surface of a fan housing;
• a duct flange that is curved and extends from a first end of the mount plate;
• a plurality of upper flanges that are curved and extend from an upper end of the mount plate and an upper end of the duct flange;
• a plurality of lower flanges that are curved and extend from a lower end of the mount plate and a lower end of the duct flange;
• and
• a rear flange provided at an end portion of the duct flange and defining a portion of a rear surface of the mask body;
• wherein a guide shoulder is rounded and protrudes from the duct flange,
• wherein the filter housing includes:
• a plurality of filter frames;
• a filter cover provided at a rear surface of each filter frame of the plurality of filter frames;
• a hinge protruding from an end portion of a filter frame of the plurality of filter frames;
• and
• a fastening hook protruding from an opposite end portion of the filter frame and configured to be caught on the filter hook, and
• wherein a plurality of guide grooves are defined in the plurality of filter frames, and a guide groove of the plurality of guide grooves is configured to engage with the guide shoulder.