US-12623044-B2 - Safety valve sheet, breathing tube, breathing tube assembly and breathing mask

US12623044B2US 12623044 B2US12623044 B2US 12623044B2US-12623044-B2

Abstract

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.

Inventors

Long He
Mingzhao Zhou
Zhi ZHUANG

Assignees

BMC MEDICAL CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20201228
Priority Date: 20191231

Claims (12)

1 . A breathing tube assembly, comprising a breathing tube and a safety valve sheet, wherein a safety valve hole is formed in a tube wall of the breathing tube, and the safety valve sheet is capable of being movably arranged in the breathing tube; and the safety valve sheet comprises a covering state being capable of covering the safety valve hole and an opening state being capable of opening the safety valve hole; wherein, in the covering state, an exhaust gap is arranged between the safety valve sheet and a hole edge of the safety valve hole; wherein 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 plurality of protrusions are formed on the outer side surface, and the plurality of protrusions are used for being contacted with an inner side surface of the hole edge of the safety valve hole when the sheet body covers the safety valve hole to form a plurality of exhaust gaps between the outer side surface and the hole edge; and/or, the plurality of protrusions are formed on the inner side surface of the hole edge of the safety valve hole, and the plurality of protrusions are used for being contacted with an outer side surface of a safety valve sheet when the safety valve sheet covers the safety valve hole inside the breathing tube to form a plurality of exhaust gaps between the outer side surface and the hole edge, wherein the plurality of protrusions are provided and arranged at intervals along a circumferential direction of the hole edge.
2 . The breathing tube assembly according to claim 1 , wherein the safety valve sheet is used for being arranged in a breathing tube which is provided with a safety valve hole of a breathing mask.
3 . The breathing tube assembly according to claim 2 , wherein the sheet body is a flexible body.
4 . The breathing tube assembly according to claim 2 , wherein a height of the protrusion relative to the outer side surface ranges from 0.1 mm to 1.2 mm.
5 . The breathing tube assembly according to claim 4 , wherein the plurality of protrusions are provided and arranged at intervals.
6 . A breathing mask, comprising an air cavity cover and a breathing tube assembly, wherein the breathing tube assembly is the breathing tube assembly according to claim 1 , wherein one end of the breathing tube is connected to the air cavity cover.
7 . The breathing tube assembly according to claim 1 , wherein the breathing tube is used for being connected to an air cavity cover of a breathing mask, wherein a safety valve hole is formed in a tube wall of the breathing tube.
8 . The breathing tube assembly according to claim 1 , wherein the breathing tube is used for being connected to an air cavity cover of a breathing mask, wherein a safety valve hole is formed in a tube wall of the breathing tube, a protrusion is formed on an inner side surface of a hole edge of the safety valve hole, and the protrusion is used for being contacted with an outer side surface of a safety valve sheet when the safety valve sheet covers the safety valve hole inside the breathing tube to form an exhaust gap between the outer side surface and the hole edge; and a height of the protrusion relative to the inner side surface of the hole edge ranges from 0.1 mm to 1.2 mm.
9 . A breathing tube assembly, comprising a breathing tube and a safety valve sheet, wherein a safety valve hole and a plurality of exhaust holes arranged at intervals around the safety valve hole are formed in a tube wall of the breathing tube, and the safety valve sheet is capable of being movably arranged in the breathing tube; and the safety valve sheet comprises a covering state capable of covering the safety valve hole and an opening state capable of opening the safety valve hole; and in the covering state, a plurality of exhaust gaps are formed between an outer side surface of the safety valve sheet and a hole edge of the safety valve hole; and the safety valve sheet comprises a covering state being capable of covering at least some of the exhaust holes and an opening state being capable of opening the covered exhaust holes.
10 . The breathing tube assembly according to claim 9 , wherein the exhaust holes are circular holes or strip holes.
11 . A breathing tube assembly, comprising a breathing tube and a safety valve sheet, wherein the safety valve sheet is used for being arranged in a breathing tube which is provided with a safety valve hole of a breathing mask, wherein the safety valve sheet comprises a sheet body being capable of covering the safety valve hole, and a plurality of exhaust holes are through holes arranged at intervals are formed in the sheet body; a safety valve hole is formed in a tube wall of the breathing tube, and the safety valve sheet is capable of being movably arranged in the breathing tube; and the safety valve sheet comprises a covering state capable of covering the safety valve hole and an opening state capable of opening the safety valve hole; and in the covering state, a plurality of exhaust gaps are formed between an outer side surface of the safety valve sheet and a hole edge of the safety valve hole; wherein the plurality of exhaust holes are arranged inside a portion where the safety valve sheet contacts the hole edge of the safety valve hole.
12 . The breathing tube assembly according to claim 11 , wherein the sheet body is a flexible body.

Description

CROSS REFERENCE TO RELEVANT APPLICATIONS This application is the national phase entry of International Application No. PCT/CN2020/140021, filed on Dec. 28, 2020, which is based upon and claims priority to Chinese Patent Application No. 201911421000.8, filed on Dec. 31, 2019; the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the field of medical instruments, and more particularly, to a safety valve sheet, a breathing tube, a breathing tube assembly and a breathing mask. BACKGROUND At present, full-face mask on the market may be classified into an exhausted mask and a non-exhausted mask according to different exhaust modes. The exhausted mask is connected to a pressure support device such as a ventilator through a conduit, so as to connect a gas pressure provided by, for example, the ventilator with an airway of a patient. The exhausted mask is provided with a special exhaust hole at a mask end, so as to facilitate exhausting breathing exhaust gas. In addition, in order to prevent suffocation in the case that the ventilator fails or the conduit is blocked, the full-face mask is usually provided with a safety valve hole. A safety valve sheet is arranged at the safety valve hole inside the exhausted mask. For example, there are two existing exhaust schemes for the full-face mask. In one scheme, the exhaust hole and the safety valve hole are both arranged in a bent tube of the mask. In the other scheme, the exhaust hole is arranged in a frame of the mask, and the safety valve hole is arranged in the bent tube. In this way, when the ventilator works normally, there are an inspiration state and an expiration state. In the inspiration state, an air pressure pushes up the safety valve sheet to block the safety valve hole. Some air flow from the ventilator is delivered to the patient, and some air flow is exhausted through the exhaust hole. In the expiration state, the air pressure pushes up the safety valve sheet to block the safety valve hole. The air flow from the ventilator and the exhaust gas expired by the patient are exhausted through the exhaust hole. When the ventilator has a single failure or the conduit of the ventilator is blocked, the safety valve sheet is recovered to a stretched state due to its own elasticity, thus blocking the conduit of the ventilator and opening the safety valve hole. The patient may breathe through the exhaust hole and the safety valve hole to prevent suffocation. However, the current structure also has some shortcomings. For example, most patients use the mask for a long time in a quiet environment at night, but the mask makes loud noise during exhausting, which usually affects the sleep quality of the patients and bed partners of the patients. For another example, the mask or the bent tube has a large volume, a complex structure, and relatively high material cost and economic cost. SUMMARY In a first aspect, the present disclosure aims to provide a safety valve sheet, and the safety valve sheet is simple in structure and can effectively reduce exhaust noise after being applied to a breathing mask. In order to achieve the above object, the present disclosure provides a safety valve sheet, and the safety valve sheet is used for being arranged in a breathing tube which is provided with a safety valve hole of a breathing mask, wherein the safety valve sheet includes a sheet body, and the sheet body includes 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. In the technical solution, the protrusion is formed on the outer side surface of the sheet body of the safety valve sheet, so that after the safety valve sheet is applied to the breathing tube of the breathing mask, the safety valve sheet will cover the safety valve hole during normal inspiration and expiration of a user through the breathing mask. At the moment, the protrusion is contacted with the inner side surface of the hole edge of the safety valve hole, so that the exhaust gap is formed between the outer side surface of the safety valve sheet and the hole edge, and exhaust gas expired by the user will be exhausted through the exhaust gap, thus reducing exhaust noise. In addition, it is not necessary to arrange an additional exhaust structure on the breathing tube of the breathing mask, so that the breathing mask is simple in structure, thus reducing a cost. Further, the sheet body is a flexible body. Further, a height of the protrusion relative to the outer side surface ranges from 0.1 mm to 1.2 mm; and/or, a plurality of protrusions are provided and arranged at intervals. In a second aspect, the present disclosure provides a breathing tube, and the