초록 ▼

A dustproof mask comprises a filter unit disposed inside a mask cover. The filter unit is provided with a baggy filter having an inhalation hole in a position corresponding to a mouth of a user. A boundary plate disposed adjacent the filter unit has vent holes opposing the inhalation hole. The user

A dustproof mask comprises a filter unit disposed inside a mask cover. The filter unit is provided with a baggy filter having an inhalation hole in a position corresponding to a mouth of a user. A boundary plate disposed adjacent the filter unit has vent holes opposing the inhalation hole. The user can only take in clean open air through the filter when the user inhales open air through the mouth and the user can only exhale inner air through the nostrils.

대표청구항 ▼

[ What is claimed is:] [1.] A dustproof mask comprising:a cloth mask cover;a filter unit disposed inside the mask cover and provided with a flat baggy filter having an inhalation hole at a position corresponding to a mouth of a user and defining a space therein; anda soft boundary plate disposed adj

[ What is claimed is:] [1.] A dustproof mask comprising:a cloth mask cover;a filter unit disposed inside the mask cover and provided with a flat baggy filter having an inhalation hole at a position corresponding to a mouth of a user and defining a space therein; anda soft boundary plate disposed adjacent the filter unit and having vent holes that communicate with the inhalation hole and oppose the mouth of the user such that, during inhalation, airtightness is formed between the mouth of the user and a surface of the boundary plate;wherein the dustproof mask regulates breathing of the user in a manner of inhaling open air through the mouth and of exhaling inner air through nostrils of the user.