TWI630012B - Check valve and respirator with check valve - Google Patents

Abstract

The invention relates to a one-way valve and a respirator with the one-way valve. The one-way valve includes a base and a diaphragm. The seat has an opening, and one side wall of the opening has an inclined surface. The diaphragm is located at the opening and resists the inclined surface. . The one-way valve of the present invention can be applied to a respirator, and is arranged on an air port of a mask body of one of the respirators. The diaphragm of the one-way valve of the present invention abuts the inclined surface of the seat body, thereby increasing the air-tight effect to avoid the phenomenon of gas leakage.

Description

Check valve and respirator with check valve

The present invention relates to a one-way valve and a respirator having the one-way valve, in particular to a one-way valve and a respirator with good air tightness.

    According to the press, breathing filter devices range from early military gas masks for chemical weapons, to industrial respirators for working environments with harmful gases or suspended particles, or filtering masks for medical care. The history of their development and evolution shows that breathing The use of filtering devices is becoming more and more widespread. Generally speaking, a respiratory filter device mainly includes a mask and at least one air port, which is an air inlet or an exhalation port. The mask is provided on the face of the user and is mainly used to isolate the respiratory organs (mouth and nose) from the outside. Avoid direct inhalation of outside air. The air inlet is arranged in front of or on both sides of the mask. The air inlet is mainly connected to a filter (such as a canister) or an air supply device, so as to provide clean and non-toxic air to the user. In addition, the exhalation port is also provided in front of or on both sides of the mask. The exhalation port is mainly used for the user to discharge the exhaled gas.

    According to the above, when the user establishes a negative pressure in the mask by inhaling, the air will be guided through the filter and into the mask through the air inlet, and when the user exhales, exhale from the user's mouth The positive air will build a positive pressure in the mask, so that the exhaled gas will be discharged out of the mask through the exhalation port. However, in order to avoid that the unfiltered air directly enters the mask through the exhalation port during inhalation, the breath filter device will set an exhalation valve at the exhalation port. The exhalation valve will make the gas flow in one direction, so Allows exhaled gas to escape from the inside of the mask. Furthermore, in order to provide the user with high comfort and high safety, when the user exhales, the membrane valve plate of the exhalation valve will be easily pushed by the exhaled gas of the user to open the exhalation valve, and the user breathes in When exhaling, the diaphragm of the exhalation valve can be quickly closed and sealed to prevent harmful gas from entering the mask.

    Please refer to the first diagram, the second diagram, and the third diagram, which are a perspective view of a conventional respirator, an exploded view of an exhalation section, and a sectional view of an exhalation section. As shown in the figure, the conventional respirator 1 'includes a mask body 10', two air intake portions 12 ', and an exhalation portion 14'. The mask body 10 'is worn by a user on the face to provide an air-tight space. Each air inlet portion 12 ′ includes a filter device 122 ′ (such as a poison filter canister) and an air inlet (not shown). The filter device 122 ′ is disposed on both sides of the mask body 10 ′, and the filter device 122 'With respect to the air inlet of the mask body 10', the air filtered by the filtering device 122 'enters the inside of the mask body 10' through the air inlet.

    The exhalation part 14 'is provided with an exhalation port 140', an exhalation valve 142 ', and a cover 144', and the exhalation port 140 'is provided in the mask body 10'. The exhalation valve 142 'includes a fixing member 1420', a base 1426 ', and a diaphragm 1422'. The seat 1426 'is provided on the exhalation port 140', the fixing member 1420 'is provided on the seat 1426', the diaphragm 1422 'is provided on the fixing member 1420', and covers the outside of the fixing member 1420 ' . The cover 144 'is disposed outside the exhalation valve 142' and is fixed to the seat 1426 '.

    Please refer to FIG. 4A and FIG. 4B together, which are schematic diagrams showing the operation of the exhalation valve in the inhalation state of the user and the operation diagram of the exhalation state. The detailed structure of the exhalation valve 142 'will be further described here. The fixing member 1420 'has a first fixing portion 1421' (such as a hole), the diaphragm 1422 'is provided with a second fixing portion 1423' (such as a protruding post), the first fixing portion 1421 'and the second fixing portion 1423 'cooperate with each other to fix the membrane 1422' to the fixing member 1420 '. The fixing member 1420 'has a plurality of holes 1424' for allowing gas to pass through.

    As shown in Figure 4A, when the user inhales, the lower surface of the membrane 1422 'covers the outside of the fixing member 1420', and covers the outside of the holes 1424 'to prevent outside air from entering the mask. Inside the body 10 '(as shown in the first figure). The lower surface of the membrane 1422 'covers the upper surface of the base 1426', so that external air can be prevented from entering the holes 1424 'and entering the inside of the mask body 10'. In addition, as shown in FIG. 4B, when the user exhales, the gas exhaled by the user pushes the diaphragm 1422 ', and the diaphragm 1422' is flipped to the outside of the exhalation valve 142 ', so that the holes 1424 'communicates with the outside to let the user exhale the gas.

    It can be known from the above that the lower surface of the membrane 1422 'covers the upper surface of the base 1426', and the holes 1424 'are sealed to prevent outside air from entering the inside of the mask body 10' without filtering. However, the lower surface of the membrane 1422 'is not easy to be completely flat due to manufacturing factors or weather changes, so the lower surface of the membrane 1422' cannot be completely flat and covers the upper surface of the base 1426 ', so the membrane A gap is easily generated between the lower surface of 1422 'and the upper surface of the base 1426'. In addition, the respirator 1 'is prone to deform under the surface of the membrane 1422' under long-term use or in a harsh environment, so it cannot completely cover the upper surface of the base 1426 ', so the membrane There is a gap between the sheet 1422 'and the base 1426'. In this way, when the user inhales, harmful external air will pass through the gap of the exhalation valve 142 'and the holes 1424' through the gap of the exhalation valve 142 'and endanger the user. Therefore, the conventional respirator 1 'has unsafe factors.

    In addition, since the lower surface of the membrane 1422 'covers the upper surface of the base 1426', the contact area between the membrane 1422 'and the base 1426' is large. The gas exhaled by the user is under water, and the water will stay on the lower surface of the membrane 1422 ', so that the lower surface of the membrane 1422' will easily adhere to the upper surface of the base 1426 ', resulting in the The diaphragm 1422 'is not easy to be pushed by the user's exhaled gas, so the user needs to exhale harder to push the diaphragm 1422', which will cause the user's breathing discomfort.

    In addition, when the user exhales, the gas exhaled by the user pushes the membrane 1422 'through the holes 1424' of the fixing member 1420 'to be discharged to the outside of the mask body 10'. Because the total area of the holes 1424 'is small, only the lower surface of the membrane 1422' is pushed by the user's exhaled gas, which causes a pressure difference between the upper and lower surfaces of the membrane 1422 '. It is large, so the user needs to work hard to exhale in order to discharge the exhaled gas to the outside of the mask body 10 ', which will also cause the user's breathing discomfort.

    Generally speaking, the existing exhalation valve has the above problem, that is, there is a gap between the diaphragm and the seat, which causes the user to inhale harmful external air into the mask body through this gap of the exhalation valve. Harm to users. For example, U.S. Patent No. 2,999,498, as shown in the fifth figure, discloses an exhalation valve that includes a seat body 8 and a diaphragm 9, and the seat body 8 has three sealing ribs 8b, 8c, and 8d. The sealing ribs 8b, 8c, and 8d are arranged on the surface of the base body 8 like a mountain peak, and are located outside the opening 81 of the base body 8. The sealing ribs 8b, 8c, and 8d are annular and have different diameters. The diameter of the first sealing rib 8b is larger than the diameter of the second sealing rib 8c. The diameter of the second sealing rib 8c is larger than the diameter of the third sealing rib 8d. The second sealing rib 8c is located in the first sealing rib 8b. Below, the third sealing rib 8d is located below the second sealing rib 8c. From a sectional view, the three sealing ribs 8b, 8c, and 8d are arranged in an arc shape. In addition, there are grooves between the three sealing ribs 8b, 8c, and 8d. The lower surface of the diaphragm 9 covers the three sealing ribs 8b, 8c, and 8d, and its operation is similar to that of the fourth A and fourth B figures.

    Although this patent improves the base body 8, its structure is complicated. This patent covers the bottom surface of the diaphragm 9 with three sealing ribs 8b, 8c, and 8d of the seat 8 to prevent unfiltered external air from entering the interior of the respirator through the exhalation valve, so the diaphragm There is still a gap between 9 and the seat 8 so that when the user inhales, it still cannot effectively block the unfiltered external air from entering the respirator through the exhalation valve. In addition, since the diaphragm 9 must cover the three sealing ribs 8b, 8c, and 8d of the base body 8, and the three sealing ribs 8b, 8c, and 8d are located outside the opening 81 of the base body 8, the membrane The lower surface of the sheet 9 must be larger than the opening 81 of the base body 8. In this way, a part of the lower surface of the diaphragm 9 is pushed by the user's exhaled gas, and a part of the lower surface of the diaphragm 9 is not pushed by the user's exhaled gas, so that the upper and lower surfaces of the diaphragm 9 are caused by There is a large difference in pressure between the two, so the user needs to work harder to exhale to discharge the exhaled air to the outside of the respirator, which will also cause the user's breathing discomfort.

    Therefore, how to break through and solve such missing problems of the conventional one-way valve, and then improve its airtightness and economic benefits, is the key project that the industry or people with wisdom should strive to solve and overcome at present.

For this reason, the inventors have taken into account the lack of the known one-way valve and the fact that its structural design is not ideal. The inventor of this case set out to develop a solution for it, hoping to develop a more secure and economical solution. The one-way valve, to serve the public and promote the development of this industry, has led to the invention of this invention after many years of conception.

    The purpose of the present invention is to provide a one-way valve, in which the side wall of the opening of the seat body has an inclined surface, and the diaphragm abuts against the inclined surface, so that when the diaphragm is stressed against the inclined surface, it can ensure that the diaphragm closes the opening of the seat body. To actually block the gas flow.

    The purpose of the present invention is to provide a one-way valve. The side wall of the opening of the seat body has an inclined surface, and one surface of the diaphragm is located in the opening and abuts the inclined surface. When the person exhales, the diaphragm can be easily pushed away by the exhaled gas, thereby improving the breathing comfort of the user.

    The purpose of the present invention is to provide a respirator with a one-way valve. When the user inhales, the exhalation valve does seal the exhalation port to prevent unfiltered harmful air from entering the mask through the exhalation port. With high security.

    The check valve of the present invention has a base body and a diaphragm, the seat body has an opening, and one side wall of the opening has an inclined surface, and the diaphragm is located at the opening and abuts against the inclined surface.

The respirator with a one-way valve according to the present invention has a mask body, a base body and a diaphragm. The mask body is provided with an air port, the seat body is provided at the air port, the seat body has an opening, and the opening communicates with the air port. One side wall of the opening has an inclined surface, and the diaphragm is located on the opening and abuts against the inclined surface.

Conventional technology:

1'. ． ． Respirator

10 ’. ． ． Mask body

12 ’. ． ． Air intake

122 '. ． ． filter

14 '. ． ． Exhalation

140 '. ． ． Exhalation

142 '. ． ． Exhalation valve

1420 '. ． ． Fastener

1421 '. ． ． First fixed part

1422 '. ． ． Diaphragm

1423 '. ． ． Second fixed part

1424 '. ． ． Hole

1426 ’. ． ． Seat

144 '. ． ． Cover

8. ． ． Seat

8b. ． ． Sealing rib

8c. ． ． Sealing rib

8d. ． ． Sealing rib

81. ． ． Opening

9. ． ． Diaphragm

this invention:

1. ． ． Respirator

10． ． ． Mask body

102. ． ． Air inlet

104. ． ． Exhalation

11. ． ． Seat

111. ． ． Opening

1111. ． ． First entrance

1113. ． ． Second entrance

1115. ． ． Air outlet

113. ． ． Bevel

12. ． ． Fastener

122. ． ． First fixed part

124. ． ． Hole

14. ． ． Diaphragm

141. ． ． First surface

142. ． ． Second fixed part

143. ． ． Second surface

145. ． ． Side surface

149. ． ． Side surface

15. ． ． Cover

151. ． ． Hole

152. ． ． First fixed part

16. ． ． filter

18. ． ． power

19. ． ． power

20. ． ． power

The first picture is a perspective view of a conventional respirator;
The second picture is an exploded view of the exhalation part of the conventional technology;
The third figure is a sectional view of the exhalation part of the conventional technology;
The fourth diagram A is a schematic diagram of the operation of the conventional exhalation valve in the user's inhalation state;
The fourth diagram B is a schematic diagram of the operation of the conventional exhalation valve in the exhalation state of the user;
The fifth figure is a cross-sectional view of an exhalation valve of another conventional technique;
The sixth diagram is a perspective view of a respirator according to an embodiment of the present invention;
The seventh figure is an exploded view of the exhalation part of an embodiment of the present invention;
The eighth figure is a cross-sectional view of an exhalation part of an embodiment of the present invention;
FIG. 9A is a schematic diagram of an action of a diaphragm in a user inhaling state according to an embodiment of the present invention;
FIG. 9B is a schematic diagram of an action of a diaphragm in a user's exhalation state according to an embodiment of the present invention;
The tenth figure is a sectional view of another embodiment of the present invention; and the eleventh figure is a sectional view of still another embodiment of the present invention.

    In order to make the reviewing committee members have a better understanding and understanding of the structural features and achieved effects of the present invention, I would like to provide examples and cooperation with detailed descriptions as follows:

    The gap between the diaphragm of the conventional exhalation valve and the seat body is easy to cause, so that the unfiltered harmful or suspended particles of gas enter the inside of the mask, thereby jeopardizing the user, and between the two sides of the diaphragm The pressure difference is large, which causes the user's breathing discomfort. Therefore, the inventor designed this one-way valve to achieve the goals of high safety and improved breathing comfort.

    Please refer to the sixth figure, the seventh figure and the eighth figure, which are a perspective view of the respirator of the present invention, an exploded view of the exhalation part, and a sectional view of the exhalation part. As shown in the figure, the respirator 1 with a one-way valve according to the present invention includes a mask body 10 and at least one one-way valve. The one-way valve includes a base 11, a fixing member 12, and a diaphragm 14. The mask body 10 is provided with at least one air port. In this embodiment, the air port 102 and the exhalation port 104 are taken as examples. The air inlet 102 communicates with a filtering device 16. The filtering device 16 is used for filtering harmful external air or air with suspended particles. The exhalation port 104 can expel the air exhaled by the user. The base 11 is disposed on the air port. In this embodiment, the base 11 is disposed on the exhalation port 104.

    The base 11 has an opening 111 that communicates with the air port. In this embodiment, the opening 111 communicates with the exhalation port 104. The side wall of the opening 111 of the base 11 has an inclined surface 113, the inclined surface. 113 is directed toward the outside of the mask body 10. In one embodiment of the present invention, the base body 11 and the mask body 10 are integrally formed, that is, directly formed on the air port of the mask body 10. In addition, as shown in FIG. 9A, the opening 111 has a first entrance and exit 1111 and a second entrance and exit 1113. The first entrance and exit 1111 is larger than the second entrance and exit 1113. The gas exhaled by the user is discharged to the outside of the mask body 10 through the second inlet and outlet 1113 and the first inlet and outlet 1111. A cover 15 is disposed on the base 11. The cover 15 has a plurality of holes 151 for discharging gas.

    In addition, the fixing member 12 is disposed on the base body 11 and located within the opening 111, and the fixing member 12 is provided with a first fixing portion 122. The diaphragm 14 is disposed on the outer side of the fixing member 12, that is, the diaphragm 14 is disposed on the base body 11 and located at the opening 111, and the diaphragm 14 is provided with a second fixing portion 142, and the second fixing portion 142 is fixed to the first fixing portion 122. This embodiment is described by taking the first fixing portion 122 as a fixing hole and the second fixing portion 142 as a fixing post as an example. The first fixing portion 122 and the second fixing portion 142 can also be other connections. Fixed structure. The first fixing portion 122 is disposed at the center of the fixing member 12, and the second fixing portion 142 is passed through the first fixing portion 122 so that the diaphragm 14 can be fixed to the fixing member 12.

    The diaphragm 14 has a first surface 141, a second surface 143, and a side surface 145. The side surface 145 is located between the first surface 141 and the second surface 143, and as shown in FIG. 9A, The second surface 143 is smaller than the first entrance and exit 1111 and larger than the second entrance and exit 1113, so the diaphragm 14 is located in the opening 111, and the edge connecting the second surface 143 and the side surface 145 abuts the inclined surface 113 . The diaphragm 14 can also abut against the uppermost end of the inclined surface 113, and not all of the diaphragm 14 is located in the opening 111, and only a part of the diaphragm 14 is located in the opening 111, such as the diaphragm 14第二 表面 143。 The second surface 143.

    Please refer to FIG. 9A and FIG. 9B together, which are cross-sectional views at the section line AA ′ of FIG. 7. Figures 9A and 9B show the movement of the diaphragm 14 of the check valve provided in the exhalation port 104 in the inhalation state and the exhalation state of the user. The use state of the respirator with a one-way valve according to the present invention is further described here. When the user inhales, the inside of the mask body 10 assumes a negative pressure state, and external air will enter the mask body 10 through the filtering device 16 and the air inlet 102 (as shown in the sixth figure). At this time, the diaphragm 14 of the one-way valve provided on the exhalation port 104 will abut the inclined surface 113 of the seat body 11, and external air can be prevented from entering the mask body 10 through the exhalation port 104.

    Furthermore, because the diaphragm 14 is under the suction of the user, the diaphragm 14 is equivalent to being subjected to a downward force 18, and the downward force 18 is decomposed into two forces 19 and 20. The force 19 will be perpendicular to the slope 113 and the force 20 will be parallel to the slope 113. The forces 19 and 20 are applied to the diaphragm 14, and the diaphragm 14 will abut against the inclined surface 113 and closely contact the inclined surface 113, so there will be no gap between the diaphragm 14 and the inclined surface 113, but it will be completely Sealing the exhalation port 104 increases the air-tightness effect to prevent external air from entering the mask body 10 through the exhalation port 104, so it has excellent safety to protect the user.

    In addition, in another embodiment of the present invention, part of the first surface 141, part of the second surface 143, or part of the side surface 145 or all of the side surface 145 of the diaphragm 14 of the present invention may also abut against the The inclined surface 113, or part of the first surface 141, part of the second surface 143, and the side surface 145 all abut against the inclined surface 113, so that when the user inhales, the diaphragm 14 completely seals the exhalation port 104 To prevent outside air from entering the mask body 10 through the exhalation port 104.

    As shown in FIG. 9B, when the user exhales gas, the inside of the mask body 10 assumes a positive pressure state, and the exhaled gas will push the diaphragm 14 at this time, except for the place where the diaphragm 14 is fixed. The diaphragm 14 will be turned outward, so that the exhaled gas can be easily discharged from the exhalation port 104 without being blocked by the diaphragm 14. Since the area of the diaphragm 14 contacting the inclined surface 113 of the present invention is small, the diaphragm 14 will not adhere to the base 11 due to water vapor staying on the diaphragm 14, so the user is easy to use when exhaling gas. The breath exhaled by the person is pushed away, thereby improving the breathing comfort of the user.

    In addition, please refer to FIG. 9A. The position where the diaphragm 14 contacts the inclined surface 113 will form an air outlet 1115, and the air outlet 1115 is opposite to the entire second surface 143 of the diaphragm 14. As shown in FIG. 9B, when the user exhales the gas, the gas will flow to the air outlet 1115 and push the diaphragm 14. Since all of the second surface 143 is relative to the air outlet 1115, the gas exhaled by the user will push the entire second surface 143. In other words, the breath exhaled by the user will act on the entire second surface 143, so the pressure difference between the first surface 141 and the second surface 143 is small, so that the diaphragm 14 can be easily used by the user. The exhaled gas is pushed away, which can improve the breathing comfort of the user. In this embodiment, the maximum air outlet area of the air outlet 1115 is equal to the area of the second surface 143 of the diaphragm 14.

    As can be seen from the above, the present invention seals the exhalation port 104 by the diaphragm 14 abutting against the inclined surface 113. However, the existing one-way valve uses the surface of the diaphragm to cover the surface of the seat body and seals the exhalation port. Under the uneven surface of the diaphragm, there will be a gap between the surface of the diaphragm and the surface of the base, so the air-tight effect is poor, so that harmful or suspended particles of external air easily enter the mask through the exhalation port . The present invention solves the above-mentioned shortcomings, because the side wall of the base 11 of the present invention has the inclined surface 113, and the diaphragm 14 abuts against the inclined surface 113, so that the diaphragm 14 can completely seal the breath when the user inhales. The air port 104 can avoid outside air from the face entering the mask body 10 through the exhalation port 104, thereby improving the safety of the user.

    Please refer to FIG. 7, FIG. 9A and FIG. 9B. As shown in the figure, the fixing member 12 mainly fixes the diaphragm 14. Since the fixed portion of the first fixing portion 122 and the second fixing 142 is a single point, the unfixed portion of the diaphragm 14 can be moved to facilitate gas discharge. When the user exhales, the exhaled air of the user will push the membrane 14 away from the fixed place and discharge it outward. In this embodiment, as shown in FIG. 9B, the outer edge of the diaphragm 14 is pushed away by the gas exhaled by the user and discharged outward. The fixing member 12 is not limited to a specific shape, and it only needs to be capable of fixing the diaphragm 14. The fixing member 12 in this embodiment may be in a plate shape (circular plate), and the fixing member 12 is provided with a plurality of holes 124, which are used for gas to be discharged from the exhalation port 104 (as shown in the sixth figure). Therefore, the holes 124 are not limited in size and number, and the fixing member 12 can support the membrane 14 where the holes 124 are not provided. In addition, the fixing member 12 may be additionally disposed in the base body 11, or the base body 11 and the fixing member 12 may be integrally formed.

    Since the diaphragm 14 of the present invention is tightly abutted against the inclined surface 113 under a force, there is no gap between the diaphragm 14 and the inclined surface 113. Therefore, external air can be completely prevented from entering the mask body 10 through the exhalation port 104.

    Please refer to the tenth figure, which is a cross-sectional view of another embodiment of the present invention. As shown in the figure, it is changed based on the above embodiment. The cross-section of the side surface 149 of the diaphragm 14 in this embodiment has a circular shape, which can increase the area of the diaphragm 14 against the inclined surface 113. To increase the effect of airtightness.

    Please refer to FIG. 11, which is a cross-sectional view of another embodiment of the present invention. As shown in the figure, the diaphragm 14 of this embodiment is disposed on the cover 15, so the cover 15 serves as a fixing member to fix the diaphragm 14. The cover 15 has a first fixing portion 152, and the second fixing portion 142 of the diaphragm 14 is fixed to the first fixing portion 152. This embodiment is described by taking the first fixing portion 152 as a fixing hole and the second fixing portion 142 as a fixing post as an example. The first fixing portion 152 and the second fixing portion 142 can also be other connections. Fixed structure. The second fixing portion 142 is passed through the first fixing portion 152, so that the diaphragm 14 can be fixed to the cover body 15 and disposed on the base body 11.

    The check valve of the present invention is mainly aimed at improving the problems of poor airtightness of the conventional check valve, the large pressure difference between the two surfaces of the diaphragm, and the large area of the diaphragm contacting the seat body. According to the present invention, the airtight effect can be improved by pressing the diaphragm against the inclined surface of the base body, and one surface of the diaphragm can be completely pushed by the gas exhaled by the user, thereby reducing the pressure difference between the two surfaces of the diaphragm. When the check valve of the present invention is used as an exhalation valve in a respirator, it can prevent unfiltered external air from entering the inside of the respirator through the exhalation port when the user inhales, so the respirator has excellent safety . In addition, since the pressure difference between the two surfaces of the diaphragm is small, the user's breathing comfort is improved. In addition, the area of the diaphragm contacting the seat is small, so the diaphragm will not stick to the seat due to water vapor staying on the diaphragm, so the diaphragm is easily pushed by the user's exhaled gas, which improves the user's breathing comfort degree.

    In addition, in the foregoing embodiment, a check valve is used as an exhalation valve and is provided at the exhalation port for explanation. The slanted surface and the diaphragm of the present invention can also be provided at the air inlet in the opposite direction, so that the check valve can be used as Inhalation valve, so the check valve of the present invention can be used as an exhalation valve or an inhalation valve of a respirator. In addition, the check valve of the present invention can be applied to other devices without being limited to a respirator.

    However, the above are only examples of the present invention, and are not intended to limit the scope of implementation of the present invention. For example, all equivalent changes and modifications in accordance with the shape, structure, characteristics, and spirit described in the scope of the patent application for the present invention are equivalent. It should be included in the patent application scope of the present invention.

The invention is truly a novel, progressive, and industrially available user, which should meet the patent application requirements stipulated by the Chinese Patent Law. No doubt, the invention patent application was submitted in accordance with the law. prayer.

Claims (12)

A one-way valve includes: a body having an opening, a side wall of the opening having an inclined surface; and a diaphragm located in the opening and resisting the inclined surface; wherein the opening has a first entrance and exit And a second entrance, the first entrance is larger than the second entrance, one surface of the diaphragm is smaller than the first entrance and larger than the second entrance, and is located in the opening and abuts the inclined surface. The one-way valve according to item 1 of the scope of patent application, further comprising: a fixing member provided on the seat body, and the diaphragm provided on the fixing member. The one-way valve according to item 1 of the scope of patent application, wherein the diaphragm is pressed against the inclined surface by a force parallel to the inclined surface, and an air outlet is enclosed by a position where the diaphragm contacts the inclined surface of the opening. , The air outlet is all relative to one surface of the diaphragm. A respirator with a one-way valve comprises: a mask body provided with at least one air port; a body provided at the air port; the base body having an opening communicating with the air port; The side wall has an inclined surface; and a diaphragm is located at the opening and abuts against the inclined surface; wherein the opening has a first entrance and a second entrance, and the first entrance is larger than the second entrance, and the diaphragm A surface is smaller than the first entrance and exit and larger than the second entrance and exits within the opening and abuts the slope. The respirator according to item 4 of the scope of patent application, further comprising: a fixing member provided on the base body, and the diaphragm provided on the fixing member. The respirator according to item 4 of the scope of patent application, wherein the diaphragm has a first surface, a second surface, and a side surface, and the side surface is located between the first surface and the second surface. A surface, the second surface, and / or the side surface abut against the inclined surface. The respirator according to item 4 of the scope of patent application, wherein the diaphragm has a first surface, a second surface, and a side surface, and the side surface is located between the first surface and the second surface. An edge connecting the two surfaces to the side surface abuts the inclined surface. The respirator according to item 4 of the scope of patent application, wherein the diaphragm is pressed against the inclined surface by a force parallel to the inclined surface. The respirator according to item 4 of the scope of patent application, wherein a position where the diaphragm contacts the inclined surface of the opening forms an air outlet, and the air outlet is opposite to the entire surface of one surface of the diaphragm. The respirator according to item 4 of the scope of patent application, wherein the seat body is integrally formed with the mask body, and the air port is an exhalation port or is an air inlet. The respirator according to item 10 of the scope of patent application, wherein the fixing member is a cover, and the cover is disposed on the base. The respirator according to item 4 of the scope of patent application, wherein the diaphragm has a first surface, a second surface, and a side surface, the side surface is located between the first surface and the second surface, and the side The cross section of the surface is round.