Breathable valve and shell assembly

Abstract

The ventilation valve comprises a valve body, a waterproof ventilation film and a valve cover, the valve body comprises a main body part and an installation part which are connected, the valve cover is positioned at one end, deviating from the installation part, of the main body part, the waterproof ventilation film is fixed to the end face, deviating from the installation part, of the main body part in a sealed mode, and at least two supporting ribs are arranged on the end face, deviating from the installation part, of the main body part at intervals in the circumferential direction. At least one clamping part is arranged on the outer edge of the surface, facing the main body part, of the valve cover, each clamping part comprises an axial limiting rib used for being connected with the corresponding supporting rib and two circumferential limiting ribs arranged on the two circumferential sides of the axial limiting rib correspondingly, and the axial limiting ribs axially limit the supporting ribs; and each circumferential limiting rib is positioned adjacent to one supporting rib in the circumferential direction. Axial and circumferential limiting between the clamping part and the supporting rib can be achieved at the same time, an axial limiting structure does not need to be additionally arranged in the ventilation area, and the structure of the valve body and the structure of the valve deck are simplified. A gas exhaust path in the ventilation valve is smoother, the flow resistance is small, and the ventilation volume of the ventilation valve is larger.

Description

TECHNICAL FIELD

[0001] The utility model relates to waterproof and breathable technical field, especially in a kind of breathable valve and shell assembly. BACKGROUND

[0002] The utility model discloses a kind of breathable valves with the utility model patent No.CN221569550U discloses a kind of breathable valve, including valve cover, valve body and waterproof and breathable membrane, valve body includes main part and installation part, valve body has breathable passage, and it is through main part and installation part, installation part is with the function of cooperation, fixed with the vent of equipment, it is fixed on equipment with breathable valve, installation part can be claw type structure or structure with external thread.Valve cover is fixedly installed on main part, and it is formed in the venting area between valve cover and main part, waterproof and breathable membrane is fixed on main part and covers breathable passage, venting area is communicated with breathable passage by waterproof and breathable membrane.

[0003] The connecting structure between valve cover and main part is as follows: the outer ring of valve cover extends downward to form a buckle towards the surface of valve body, the outer ring of the main part of valve body forms a notch matched with the buckle, and the buckle is connected to the corresponding notch after the installation of valve cover.In addition, a second protrusion is provided on the inner surface of the valve cover, and a first protrusion corresponding to the second protrusion is provided at the corresponding position of the valve body, so that the second protrusion and the first protrusion are in contact in the installed state, thereby limiting the axial relative displacement between the valve cover and the valve body.

[0004] In the breathable valve, the connecting structure between the valve cover and the valve body and the structure for limiting the axial relative displacement between the valve cover and the valve body are provided separately, so that the structure of the valve cover and the valve body is relatively complex.

[0005] In addition, the first protrusion and the second protrusion for limiting the axial relative displacement between the valve cover and the valve body are located in the venting area, and the first protrusion and the second protrusion both extend in the circumferential direction and have a certain circumferential length, so that the path of the gas in the venting area to the outside is blocked, which hinders the outward discharge of the gas and reduces the air permeability of the breathable valve.

[0006] Therefore, the structure of the valve cover and the valve body needs to be improved to realize stable connection between the valve cover and the valve body, simplify the structure of the valve cover and the valve body, avoid additional resistance to the discharge of the gas, and provide higher air permeability. SUMMARY

[0007] To solve the problem of the complex structure of the valve cover and the valve body of the existing breathable valve and the relatively low air permeability, the present application is proposed, and the specific scheme is as follows:

[0008] A kind of breathable valve, including valve body, waterproof and breathable membrane and valve cover;

[0009] The valve body includes a main part and an installation part connected to each other, and the main part and the installation part form a breathable passage through them.

[0010] The valve cover is positioned at one end of the main body part away from the mounting part and forms a ventilation area with the main body part;

[0011] The waterproof and breathable membrane is sealed and fixed to the end surface of the main body part away from the mounting part and covers the ventilation passage;

[0012] At least two support ribs are circumferentially spaced apart on the end surface of the main body part away from the mounting part, and the support ribs are arranged around the outer periphery of the waterproof and breathable membrane;

[0013] At least one clamping part is arranged on the outer edge of the surface of the valve cover facing the main body part, the clamping part comprises one axial limiting rib for connecting with the support rib and two circumferential limiting ribs respectively arranged on the circumferential two sides of the axial limiting rib, the axial limiting rib axially limits the support rib, and each of the circumferential limiting ribs is circumferentially adjacent to one support rib.

[0014] In the ventilation valve provided by the application, the clamping part of the valve cover comprises one axial limiting rib and two circumferential limiting ribs located on the circumferential two sides of the axial limiting rib, the support rib of the main body part is connected with the axial limiting rib of the clamping part, thereby realizing the basic connection between the valve cover and the valve body, and the axial limiting rib axially limits the support rib, thereby preventing the axial relative displacement between the valve cover and the valve body after the connection of the valve cover and the valve body, and realizing the stability of the axial connection between the valve cover and the valve body; meanwhile, the two circumferential limiting ribs on the circumferential two sides of the axial limiting rib are respectively circumferentially adjacent to one support rib, thereby preventing the rotation of the valve cover relative to the valve body and forming stable circumferential limiting between the valve cover and the valve body; and since no axial limiting structure is additionally arranged in the ventilation area, the structure of the valve body and the valve cover is simplified.

[0015] Moreover, since no protrusion for axial limiting is additionally arranged at the corresponding position of the ventilation area, the gas discharge path in the ventilation area is smoother, the flow resistance is reduced, and the ventilation amount of the ventilation valve is increased.

[0016] Further, the two support ribs are clamped on the circumferential two sides of the axial limiting rib and are positioned between the two circumferential limiting ribs.

[0017] When the valve cover is connected to the valve body, the two circumferential limiting ribs on the circumferential two sides of the axial limiting rib can also play the role of positioning and indication, that is, the corresponding two support ribs are positioned with reference to the two circumferential limiting ribs, and then the two support ribs are clamped on the circumferential two sides of the axial limiting rib, thereby realizing the rapid connection between the valve cover and the valve body. Therefore, the connection operation between the valve cover and the valve body is faster and simpler.

[0018] Further, the valve cover has a side wall at the outer edge, the axial limiting rib is a convex rib formed on the inner surface of the side wall, the convex rib and the surface of the valve cover towards the body part form an axial limiting groove, and each of the circumferential limiting ribs is a stop rib formed on the circumferential two sides of the convex rib.

[0019] The end of each of the support ribs forms a clamping protrusion, each of the clamping protrusions is clamped into the axial limiting groove, and each of the clamping protrusions is arranged circumferentially adjacent to the corresponding stop rib.

[0020] The axial limiting rib and the surface of the valve cover form an axial limiting groove, the clamping protrusion at the end of the support rib is clamped into the axial limiting groove, and the clamping protrusion is arranged circumferentially adjacent to the stop rib, the connection between the valve cover and the valve body is achieved, and the structure for limiting the axial and circumferential directions is simple, and the effect of limiting the axial and circumferential directions is stable.

[0021] Further, the convex rib extends in an arc shape, the stop rib extends in the axial direction, and each of the stop ribs is connected to the circumferential two sides of the convex rib.

[0022] The arc-shaped convex rib and the two stop ribs are connected, the overall strength of the clamping part is higher, and the axial and circumferential limiting effects of the support rib are more stable.

[0023] Further, the support rib further includes a thickness reduction area between the clamping protrusion and the starting end of the support rib, and the outer side of the support rib is formed with the thickness reduction area by lacking material.

[0024] The convex rib of the valve cover is clamped to the outer side of the thickness reduction area, and the surfaces of the convex rib and the clamping protrusion axially opposite to each other form abutment.

[0025] The outer side of the support rib is formed with the thickness reduction area below the clamping protrusion in the axial direction, which makes the support rib easy to deform, so that the operation of clamping the convex rib of the valve cover to the thickness reduction area is more labor-saving, and after the clamping is completed, the surfaces of the convex rib and the clamping protrusion axially opposite to each other form abutment, thereby forming stable axial limiting between the valve cover and the valve body.

[0026] Further, the outer wall of the thickness reduction area includes a cylindrical wall surface directly adjacent to the clamping protrusion, an arc-shaped wall surface directly adjacent to the cylindrical wall surface, and a tapered wall surface adjacent to the arc-shaped wall surface, the arc-shaped wall surface is concave inward, and the two ends of the arc-shaped wall surface are tangent to the cylindrical wall surface and the tapered wall surface, respectively.

[0027] The deformation of the thickness reduction area is smoother, the thickness reduction is more uniform and gentle, and on the basis of being easy to deform, the strength of the support rib is ensured.

[0028] Further, the valve cover has at least two, the side wall of the valve cover includes a first area corresponding to the area between the two adjacent circumferential limiting ribs in the adjacent clamping part and a second area corresponding to the position of each axial limiting rib, the average distance between the outer wall of the first area and the center of the valve cover is smaller than the average distance between the outer wall of the second area and the center of the valve cover, and the first area and the second area are circumferentially adjacent.

[0029] The two adjacent circumferential limiting ribs of the two adjacent clamping parts are relatively close, and the two adjacent circumferential limiting ribs themselves occupy a certain space, causing the area in the ventilation area corresponding to the two adjacent circumferential limiting ribs to be relatively crowded. This area is the area in the ventilation area corresponding to the position of the first area (the area in the ventilation area whose horizontal projection has a central angle equal to that of the horizontal projection of the first area), which is called the first space, and the space in the ventilation area corresponding to the position of the second area is called the second space (the area in the ventilation area whose horizontal projection has a central angle equal to that of the horizontal projection of the second area). Compared with the second space, the resistance of the gas in the first space to further flow outward to the outer surface of the first area is relatively large.

[0030] However, after the first area is provided, the flow path of the gas in the first space to the outer surface of the first area is shortened, so even if the flow resistance of the gas in the first space to further flow to the outer surface of the first area is relatively large, in general, the gas in the first space can still be discharged at a relatively fast rate, and accordingly, the gas in the ventilation area can be discharged at a relatively uniform rate.

[0031] Further, the outer wall of the first area is an axially extending plane or an obliquely extending conical surface, and / or the outer wall of the second area is a curved surface.

[0032] Further, the ratio L1 / L2 of the minimum distance L1 between the outer wall of the first area and the center of the valve cover to the distance L2 between the outer wall of the second area and the center of the valve cover is 0.8-0.96. This design first ensures that the flow path of the gas in the first space to the outer surface of the first area can be significantly shortened, and at the same time, avoids excessive deformation of the outer walls of the first area and the second area, causing strength problems at the connection between the two.

[0033] And / or, the ratio A1 / A2 of the central angle A1 corresponding to the first area to the central angle A2 corresponding to the second area is 0.3-0.7.

[0034] This design ensures that the two adjacent circumferential limiting ribs of the two adjacent clamping parts are sufficiently separated, and at the same time, ensures that the circumferential length of the second area is large enough, so that the gas in the ventilation area can be quickly and uniformly discharged.

[0035] Furthermore, this application also provides a housing assembly, including a housing with a mounting port and the above-mentioned vent valve, wherein the mounting port is flared and conical.

[0036] A sealing ring is fitted around the outer periphery of the mounting part, and the mounting part is inserted into the mounting port so that at least a portion of the sealing ring is positioned inside the mounting port, and the sealing ring is compressed by the mounting part, the mounting port and the main body.

[0037] In the housing assembly provided in this application, since at least a portion of the sealing ring fitted around the outer periphery of the mounting part is inserted into the mounting opening of the housing, the sealing ring can be squeezed by the mounting part, the mounting opening and the main body, that is, the sealing ring is simultaneously squeezed at three points, including multiple axial and radial squeezes, resulting in stable and reliable sealing performance. Attached Figure Description

[0038] Figure 1 A perspective view of the vent valve provided in this application;

[0039] Figure 2 for Figure 1 The provided front view of the vent valve;

[0040] Figure 3 for Figure 1 A cross-sectional view of the provided vent valve;

[0041] Figure 4 for Figure 1 The front view of the valve body of the provided vent valve;

[0042] Figure 5 for Figure 1 A top view of the valve body of the provided vent valve;

[0043] Figure 6 for Figure 1 A sectional view of the valve body of the provided vent valve;

[0044] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0045] Figure 8 for Figure 1 A 3D view of the valve cover of the provided vent valve;

[0046] Figure 9 for Figure 8 A top view of the valve cover of the provided vent valve;

[0047] Figure 10 for Figure 8 A bottom view of the valve cover of the provided vent valve;

[0048] Figure 11 for Figure 10 A cross-sectional view of the AA plane;

[0049] Figure 12 For Figure 1 The schematic view of the air breather valve installed on the shell.

[0050] Wherein, 1-valve body, 11-body part, 12-mounting part, 13-air passage, 14-ventilation area, 15-supporting rib, 16-clamping protrusion, 17-thickness reduction area, 171-cylindrical wall surface, 172-arc wall surface, 173-tapered wall surface, 18-anti-sinking support, 2-valve cover, 21-side wall, 211-first area, 212-second area, 22-clamping part, 221-axial limiting rib, 222-circumferential limiting rib, 223-axial limiting groove, 3-waterproof air permeable membrane, 4-sealing ring, 5-shell, 50-mounting port. DETAILED DESCRIPTION

[0051] The specific structure of the air breather valve provided by the embodiment of the present application is described in detail below.

[0052] As Figures 1-11 shown, the air breather valve includes a valve body 1, a waterproof air permeable membrane 3 and a valve cover 2, the valve body 1 includes a body part 11 and a mounting part 12 connected together, and the body part 11 and the mounting part 12 form an air passage 13 in communication. In this embodiment, the mounting part 12 includes a hollow columnar structure connected to the body part 11 and a plurality of clamping claws circumferentially spaced apart at the end of the hollow columnar structure, and the cavities surrounded by the plurality of clamping claws, the hollow interior of the hollow columnar structure and the hollowed-out area of the body part 11 are connected together to form the air passage 13.

[0053] The waterproof air permeable membrane 3 is sealingly fixed to the end surface of the body part 11 away from the mounting part 12 and covers the air passage 13 of the valve body 1. Preferably, the waterproof air permeable membrane 3 can be a PTFE microporous membrane. More preferably, a cross-shaped anti-sinking support 18 can be provided on the surface of the body part 11 away from the mounting part 12, which spans the air passage 13 and serves to support the waterproof air permeable membrane 3 to prevent the central area of the waterproof air permeable membrane 3 from being excessively concave.

[0054] The valve cover 2 is positioned at the end of the body part 11 away from the mounting part 12 and forms a ventilation area 14 with the body part 11, at least two supporting ribs 15 are circumferentially spaced apart on the end surface of the body part 11 away from the mounting part 12, the supporting ribs 15 are arranged around the outer periphery of the waterproof air permeable membrane 3, at least one clamping part 22 is provided on the outer edge of the surface of the valve cover 2 facing the body part 11, each clamping part 22 includes one axial limiting rib 221 for connecting with the supporting rib 15 and two circumferential limiting ribs 222 respectively arranged on the circumferential two sides of the axial limiting rib 221, the axial limiting rib 221 axially limits the supporting rib 15, and each circumferential limiting rib 222 is circumferentially adjacent to one supporting rib 15.

[0055] The clamping portion 22 of the valve cover 2 comprises an axial limiting rib 221 and two circumferential limiting ribs 222 located on the circumferential two sides of the axial limiting rib 221, and the support rib 15 of the main body portion 11 is connected with the axial limiting rib 221 of the clamping portion 22, thereby realizing the basic connection between the valve cover 2 and the valve body 1, and the axial limiting rib 221 limits the support rib 15 in the axial direction, so that the axial relative displacement between the valve cover 2 and the valve body 1 is prevented after the connection of the valve cover 2 and the valve body 1, thereby realizing the stability of the axial connection between the valve cover 2 and the valve body 1; meanwhile, the two circumferential limiting ribs 222 on the circumferential two sides of the axial limiting rib 221 are respectively located circumferentially adjacent to the support rib 15, thereby preventing the rotation of the valve cover 2 relative to the valve body 1 and realizing the stable circumferential limiting between the valve cover 2 and the valve body 1; since the axial limiting structure is not additionally arranged in the venting area 14, the structure of the valve body 1 and the valve cover 2 is simplified.

[0056] Moreover, since the protrusion for axial limiting is not additionally arranged at the corresponding position of the venting area 14, the gas exhaust path in the venting area 14 is smoother, the flow resistance is reduced, and the venting capacity of the venting valve is increased.

[0057] wherein, Figure 3 The extension direction of the central axis O-O line of the venting valve represents the aforementioned “axial direction”.

[0058] As shown in Figure 3 and Figure 4 , a plurality of support ribs 15 are arranged in the annular area of the surface outer circle of the main body portion 11 away from the mounting portion 12, which surrounds the outer periphery of the waterproof and venting membrane 3, and the height of the radial inner side is higher than that of the radial outer side, thereby avoiding the accumulation of water and other liquids.

[0059] As shown in Figure 4 and Figure 8 , each clamping portion 22 comprises an axial limiting rib 221 and two circumferential limiting ribs 222 respectively arranged on the circumferential two sides of the axial limiting rib 221, and after the assembly of the valve cover 2 and the valve body 1, the two support ribs 15 are clamped on the circumferential two sides of the axial limiting rib 221 and positioned between the two circumferential limiting ribs 222.

[0060] When connecting the valve cover 2 to the valve body 1, the two circumferential limiting ribs 221 on the circumferential two sides of the axial limiting rib 221 can also play the role of positioning and indication, that is, the corresponding two support ribs 15 are positioned by taking the two circumferential limiting ribs 222 as the reference, and then the two support ribs 15 are clamped between the circumferential two sides of the axial limiting rib 221 and the area surrounded by the two circumferential limiting ribs 222, thereby realizing the quick connection between the valve cover 2 and the valve body 1, so that the connection operation between the valve cover 2 and the valve body 1 is faster and simpler.

[0061] As shown in Figure 10 and Figure 11As shown in the figure, the valve cover 2 has a side wall 21 at the outer edge, an axial limiting rib 221 is a convex rib formed on the inner surface of the side wall 21, the convex rib and the surface of the valve cover 2 towards the main body 11 form an axial limiting groove 223, and each circumferential limiting rib 222 is a stop rib formed on the circumferential two sides of the convex rib. As shown in the figure, Figure 6 and Figure 3 As shown in the figure, the end of each support rib 15 forms a clamping protrusion 16, each clamping protrusion 16 is clamped into the axial limiting groove 223, and is arranged circumferentially adjacent to the corresponding stop rib.

[0062] The axial limiting rib 221 and the surface of the valve cover 2 form an axial limiting groove 223, the clamping protrusion 16 at the end of the support rib 15 is clamped into the axial limiting groove 223, and is arranged circumferentially adjacent to the stop rib, the structure of the connection between the valve cover 2 and the valve body 1 and the axial and circumferential limiting is simple, and the circumferential and axial limiting effect is stable.

[0063] More preferably, as shown in the figure, Figure 8 and Figure 10 The convex rib extends in an arc shape, the stop rib extends in an axial direction, and each stop rib is connected to the circumferential two sides of the convex rib. The arc-shaped convex rib and the two stop ribs connected thereto have higher overall strength of the clamping portion 22, and can further form more stable axial and circumferential limiting with the support rib 15.

[0064] The clamping portion 22 has at least two, for example, the clamping portion 22 can have two, three, four or more. Similarly, each clamping portion 22 includes one axial limiting rib 221 and two circumferential limiting ribs 222 on the circumferential two sides thereof.

[0065] As shown in the figure, Figures 8-10 The valve cover 2 has three clamping portions 22, the side wall 21 of the valve cover 2 includes a first area 211 corresponding to the area between the two circumferential limiting ribs 222 closest to the adjacent clamping portion 22 and a second area 212 corresponding to the position of each axial limiting rib 221, the average distance L1 between the outer wall of the first area 211 and the center of the valve cover 2 is less than the average distance l2 between the outer wall of the second area 212 and the center of the valve cover 2, that is, the outer wall of the second area 212 protrudes outward relative to the outer wall of the first area 211, and the first area 211 and the second area 212 are arranged circumferentially adjacent to each other.

[0066] As shown in the figure, Figure 10As shown, the two adjacent circumferential limiting ribs 222 of the two adjacent clamping portions 22 are relatively close to each other, and the two adjacent circumferential limiting ribs 222 themselves occupy a certain space, resulting in that the area in the ventilation area 14 corresponding to the two adjacent circumferential limiting ribs 222 is relatively crowded, which is the area in the ventilation area 14 corresponding to the position of the first area 211 (the area in the ventilation area 14, the central angle of the projection in the horizontal direction is equal to the central angle of the projection in the horizontal direction of the first area 211 and the position corresponds), which is called the first space, and the space in the ventilation area 14 corresponding to the position of the second area is called the second space (the area in the ventilation area 14, the central angle of the projection in the horizontal direction is equal to the central angle of the projection in the horizontal direction of the second area 212 and the position corresponds). Compared with the second space, the resistance of the gas in the first space to further flow outward is relatively large.

[0067] After the first area 211 is provided, the average distance L1 between the outer wall of the first area 211 and the center of the valve cover 2 is smaller than the average distance L2 between the outer wall of the second area 212 and the center of the valve cover 2, that is, the outer wall of the second area 212 protrudes outward relative to the outer wall of the first area 211, so that the flow path of the gas in the first space to flow outward to the outer surface of the first area 211 is shortened, and then even if the flow resistance of the gas in the first space to further flow to the outer surface of the first area 211 is large, in general, the gas in the first space can still be discharged at a relatively fast rate, and correspondingly, the gas in the ventilation area 14 can be discharged at a relatively uniform rate.

[0068] Preferably, the outer wall of the first area 211 is an axially extending plane or an obliquely extending conical surface; and / or, the outer wall of the second area 212 is a curved surface.

[0069] As shown in FIG. 1 and FIG. 2, the outer wall of the first area 211 is an axially extending plane, and the outer wall of the second area 212 is a curved surface. Figure 9 and Figure 10 As shown in FIG. 1 and FIG. 2, the outer edge of the valve cover 2 is formed by alternating straight line segments and curved line segments, the straight line segments are the projections of the first area 211 in the horizontal direction, and the curved line segments are the projections of the second area 212 in the horizontal direction, and correspondingly, the boundaries between the straight line segments and the curved line segments are the boundaries between the first area 211 and the second area 212.

[0070] In a more preferred embodiment, the ratio L1 / L2 of the minimum distance L1 between the outer wall of the first area 211 and the center of the valve cover 2 to the distance L2 between the outer wall of the second area 212 and the center of the valve cover 2 is 0.8-0.96, which is designed to first ensure that the flow path of the gas in the first space to flow outward to the outer surface of the first area can be significantly shortened, and at the same time, avoid the outer walls of the first area 211 and the second area 212 from deforming excessively, causing strength problems at the boundaries of the two. Preferably, the value of L1 / L2 can be 0.8, 0.85, 0.9, 0.92, 0.94 or 0.96, etc.

[0071] In a more preferred embodiment, the ratio A1 / A2 of the central angle A1 corresponding to the first area 211 to the central angle A2 corresponding to the second area 212 is 0.3-0.7. In this way, the two adjacent circumferential limiting ribs 222 of the two adjacent clamping portions 22 are sufficiently separated, and at the same time, the circumferential length of the second area 212 is large enough, so that the gas in the venting area 14 can be quickly and evenly discharged. The value of A1 / A2 can be 0.3, 0.5 or 0.7, etc.

[0072] In a more preferred embodiment of the present application, as shown in FIGS. 6 and Figure 7 As shown in FIGS. 6 and

[0073] More preferably, the outer wall of the thickness-reduced area 17 includes a cylindrical wall surface 171 directly adjacent to the clamping protrusion 16, an arc-shaped wall surface 172 directly adjacent to the cylindrical wall surface 171, and a tapered wall surface 173 adjacent to the arc-shaped wall surface 172, the arc-shaped wall surface 172 is concave inward, and the two ends thereof are tangent to the cylindrical wall surface 171 and the tapered wall surface 173, respectively. The deformation of the thickness-reduced area 17 is smoother, and the thickness reduction is more uniform and gentle, which ensures the strength of the support rib 15 on the basis of easy deformation.

[0074] As shown in FIGS. 6 and Figure 12 The present application also provides a housing assembly, which includes a housing 5 having a mounting port 50, and the venting valve described above, the mounting port 50 is flared and tapered; the outer periphery of the mounting portion 12 is sleeved with a sealing ring 4, the mounting portion 12 is inserted into the mounting port 50, so that at least part of the sealing ring 4 is positioned in the mounting port 50, the clamping pawl at the end of the mounting portion 12 is in abutment with the outer peripheral area of the mounting port 50 of the housing 5, thereby fixing the venting valve relative to the housing 5, and the sealing ring 4 is simultaneously pressed by the mounting portion 12, the mounting port 50 and the main body portion 11. Since at least part of the sealing ring 4 sleeved on the outer periphery of the mounting portion 12 is inserted into the mounting port 50 of the housing 5, the sealing ring 4 can be pressed by the mounting portion 12, the mounting port 50 and the main body portion 12, i.e. the sealing ring 4 is simultaneously pressed by three parts, including multiple axial and radial pressing, so that the sealing performance is stable and reliable.

[0075] Of course, in other embodiments, the mounting portion 12 can also be a hollow cylindrical structure, and the outer wall is provided with external threads, the mounting portion 12 and the mounting port 50 of the shell 5 are connected through threads, only in this assembly state, the sealing ring is no longer inserted into the mounting port, but is located at the outer periphery of the mounting port, and is subjected to axial extrusion of the main body portion and the shell to achieve sealing.

[0076] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vent valve comprising a valve body, a waterproof breathable membrane and a valve cover; the valve body comprises a main body portion and a mounting portion connected together, and a ventilation passage is formed through the main body portion and the mounting portion; the valve cover is positioned at an end of the main body portion away from the mounting portion and forms a ventilation area with the main body portion; the waterproof breathable membrane is sealed and fixed to an end surface of the main body portion away from the mounting portion and covers the ventilation passage; characterized in that at least two support ribs are arranged at the end surface of the main body portion away from the mounting portion in a circumferential direction, and the support ribs are arranged around an outer periphery of the waterproof breathable membrane; at least one clamping portion is arranged at an outer edge of a surface of the valve cover facing the main body portion, and the clamping portion comprises an axial limiting rib for connecting with the support ribs and two circumferential limiting ribs arranged respectively at two circumferential sides of the axial limiting rib, the axial limiting rib limits the support ribs in an axial direction, and each of the circumferential limiting ribs is arranged circumferentially adjacent to one of the support ribs.

2. The breather valve of claim 1, wherein, The two support ribs are clamped at the two circumferential sides of the axial limiting rib and are arranged between the two circumferential limiting ribs.

3. The breather valve of claim 2, wherein, The valve cover has a side wall at the outer edge, the axial limiting rib is a protruding rib formed on an inner surface of the side wall, the protruding rib and the surface of the valve cover facing the main body portion form an axial limiting groove, and each of the circumferential limiting ribs is a stop rib formed at two circumferential sides of the protruding rib; an end of each of the support ribs forms a clamping protrusion, each of the clamping protrusions is clamped into the axial limiting groove and is arranged circumferentially adjacent to the corresponding stop rib.

4. The breather valve of claim 3, wherein, The protruding rib extends in an arc shape, the stop rib extends in an axial direction, and each of the stop ribs is connected to the two circumferential sides of the protruding rib.

5. A vent valve according to claim 3 or 4, wherein The support rib further comprises a thickness reduction area between the clamping protrusion and a starting end of the support rib, and an outer part of the support rib is formed with a material deficiency to form the thickness reduction area; the protruding rib of the valve cover is clamped to an outer side of the thickness reduction area, and surfaces of the protruding rib and the clamping protrusion that are axially opposite to each other form an abutting portion.

6. The breather valve of claim 5, wherein, An outer wall of the thickness reduction area comprises a cylindrical wall surface directly adjacent to the clamping protrusion, an arc-shaped wall surface directly adjacent to the cylindrical wall surface, and a tapered wall surface adjacent to the arc-shaped wall surface, the arc-shaped wall surface is concave inward, and two ends of the arc-shaped wall surface are tangent to the cylindrical wall surface and the tapered wall surface respectively.

7. The breather valve of claim 3, wherein, The clamping portion has at least two, and the side wall of the valve cover comprises a first area corresponding to a region between two circumferential limiting ribs closest to each other in adjacent clamping portions and a second area corresponding to a position of each axial limiting rib, an average distance between an outer wall of the first area and a center of the valve cover is smaller than an average distance between an outer wall of the second area and the center of the valve cover, and the first area and the second area are arranged circumferentially adjacent to each other.

8. The breather valve of claim 7, wherein, The outer wall of the first area is a plane extending in an axial direction or a tapered surface extending in an inclined direction; and / or the outer wall of the second area is a curved surface.

9. The breather valve of claim 7, wherein, A ratio L1 / L2 of a minimum distance L1 between the outer wall of the first area and the center of the valve cover to a distance L2 between the outer wall of the second area and the center of the valve cover is 0.8-0.96, and / or a ratio A1 / A2 of a central angle A1 corresponding to the first area to a central angle A2 corresponding to the second area is 0.3-0.

7.

10. A housing assembly characterized by: a housing having a mounting opening, and the vent valve according to any one of claims 1-9, the mounting opening is in a flared taper shape; The mounting portion is inserted into the mounting port, so that at least part of the sealing ring is positioned in the mounting port, and the sealing ring is extruded by the mounting portion, the mounting port and the main body portion.

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