公开(公告)号：US20230043056A1

公开(公告)日：2023-02-09

申请号：US17790141

申请日：2020-12-28

申请人： BMC MEDICAL CO., LTD.

发明人： Long HE ,  Mingzhao ZHOU ,  Zhi ZHUANG

IPC分类号： A61M16/20 ,  A61M16/00 ,  A61M16/06 ,  A61M16/08

摘要： A safety valve sheet, a breathing tube, a breathing tube assembly and a breathing mask are provided. The safety valve sheet is used for being arranged in the breathing tube which is provided with a safety valve hole of the breathing mask, the safety valve sheet comprises a sheet body, and the sheet body comprises an outer side surface being capable of covering the safety valve hole, wherein a protrusion is formed on the outer side surface, and the protrusion is used for being contacted with an inner side surface of a hole edge of the safety valve hole when the sheet body covers the safety valve hole to form an exhaust gap between the outer side surface and the hole edge. The safety valve sheet is simple in structure and can effectively reduce exhaust noise after being applied to the breathing mask.