A nasal breathing apparatus including a main unit, a head-mount unit, a nasal unit and a gas supply unit. The main unit is provided with a main body capable of defining a chamber, two connection members and two inset holes. A rear wall of the main body has a recess portion, a perforation, a shoulder surface provided between the recess portion and the perforation, and an airtight ring protruding from the shoulder surface. The nasal unit has a main board embedded in the recess portion and abutting against the airtight ring, and two pinch plates fittingly inserted into the inset holes. Accordingly, by fittingly inserting such pinch plates into the inset holes, the nasal unit can positioned with respect to the main body better, thereby preventing the detachment due to pull-out, and the main board abutting against the airtight ring can help achieve the better air-tightness.一種鼻塞式呼吸器,包含一主體單元、一頭帶單元、一鼻塞單元及一輸氣單元。該主體單元具有一可界定一腔室的主體、二連結件及二嵌孔,該主體的一後壁具有一凹陷部、一穿孔、一設置在該凹陷部與該穿孔之間的肩面及一由該肩面凸設的氣密環圈,該鼻塞單元的一主板嵌設在該凹陷部中且抵止於該氣密環圈、二扣板嵌插在該等嵌孔中。藉此,利用該等扣板嵌插在該等嵌孔中,可使該鼻塞單元相對於該主體產生較好的定位性,防止被拉動而脫離,利用該主板抵止於該氣密環圈,可達到較佳氣密目的。10...主體單元11...腔室12...主體121...後壁122...前壁123...後壁面125...穿孔127...氣密環圈128...結合孔13...連結件14...嵌孔141...入口端142...末端143...扣止面30...鼻塞單元31...主板311...安裝孔32...鼻塞件321...插置筒322...鼻塞頭33...扣板331...連結端部332...卡止端部333...扣勾40...輸氣單元41...環套件411...凹環部42...輸氣管421...頭部422...彈性卡勾423...勾部424...按壓部
