Waterproof ventilation valve and waterproof ventilation valve assembly

Abstract

The waterproof ventilation valve comprises a valve cover, a valve body and a waterproof ventilation film, the valve body is provided with a ventilation channel, the valve body comprises a main body part and a clamping jaw, the valve cover is fixedly installed on the main body part, a ventilation area is formed between the valve cover and the main body part, and the waterproof ventilation film is fixed to the main body part and covers the ventilation channel. Each clamping jaw comprises a fixed end and a free end, one end of each fixed end is connected with the main body part, the other end of each fixed end is connected with the corresponding free end, a first notch is formed between every two adjacent free ends, and the opening radian of each first notch is gradually increased from the corresponding fixed end to the corresponding free end in the axial direction; and the radial thickness of the clamping jaw is gradually reduced from the fixed end to the free end in the axial direction. The clamping jaws of the waterproof ventilation valve have good deformation capacity and large deformation space, and can better adapt to complex installation environments.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof and breathable technology, in particular to a waterproof and breathable valve and a waterproof and breathable valve component. Background Art

[0002] The main function of the breathable valve is to exchange internal and external gases at the installation component and achieve internal and external air pressure balance at the installation component. The traditional breathable valve includes a valve body and a waterproof breathable membrane. The waterproof breathable membrane is arranged on the valve body. A claw is formed at the end of the valve body away from the waterproof breathable membrane. The claws are circumferentially surrounded to form a breathable channel for gas circulation, and the waterproof breathable membrane is connected to the breathable channel.

[0003] The vent valve in the related art has a claw structure as shown in the attached Fig.12 As shown, a slit 60 is formed between adjacent claws 22, the width of the slit 60 is small and the inner circumferential surface of the claw 22 and the inner circumferential surface of the slit 60 are located on the same circumference, and the two side surfaces of the slit 60 along the circumferential direction are parallel to the central axis direction of the air valve. Such a claw structure is relatively stable and can better prevent the claw from being damaged due to excessive deformation. Such a claw can better align with the installation port and perform snap-on assembly during the process of directly installing into the installation port, and has the functions of simple assembly and stable structure.

[0004] However, in the actual assembly process of the air valve, the air valve is not only installed directly into the installation port. Due to the limitation of the assembly scene space, the air valve cannot be installed directly and clamped into the installation port ideally. For example, when the size of the installation port is slightly smaller than the size of the claw in the initial state, the air valve cannot be assembled by direct installation. In such an application scenario, the air valve often needs to be clamped into the installation port in a relatively inclined state. However, when such a air valve is clamped into the installation port in a relatively inclined state, one of the claws usually abuts against the inner wall of the installation port first, which makes the contact area between the remaining claws and the installation port relatively small. In addition, since the deformation capacity of the claw structure of the above-mentioned air valve is relatively limited, the remaining claws may not be deformed well at this time, which greatly increases the difficulty of installing the air valve in an environment where it is assembled at a relatively inclined angle. In addition, if the deformation capacity of the claws is insufficient, when the air valve is assembled into the installation port, the claws may interfere with each other during the inward deformation process, thereby increasing the difficulty of installing the air valve. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a waterproof breathable valve and a waterproof breathable valve assembly, which solves the problem that the deformation capacity of the claw structure of the existing breathable valve is relatively limited.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A waterproof breathable valve comprises a valve cover, a valve body and a waterproof breathable membrane, wherein the valve body has a breathable passage, the valve body comprises a main body and a claw, the valve cover is fixedly mounted on the main body, and a ventilation area is formed between the valve cover and the main body, the waterproof breathable membrane is fixed on the main body and covers the breathable passage,

[0008] The claw comprises a fixed end and a free end, one end of the fixed end is connected to the main body, and the other end is connected to the free end, a first notch is formed between adjacent free ends, and the opening curvature of the first notch is gradually enlarged from the fixed end to the free end along the axial direction;

[0009] The radial thickness of the claw is gradually reduced from the fixed end to the free end along the axial direction.

[0010] The waterproof breathable valve of the utility model is fixed on the shell by means of a clamping claw, and the clamping claw will be deformed during installation. When the clamping claw is deformed, the free end is mainly deformed. First, the first notch formed between adjacent free ends has an opening arc that gradually increases in the axial direction from the fixed end to the free end, that is, the opening arc of the first notch at the end where the clamping claw first contacts the installation port is larger, which means that the closer the clamping claw is to the free end, the larger its circumferential deformation space is. Second, based on the circumferential spacing of the free ends, the opening arc of the first notch becomes larger and the circumferential arc length of the free end becomes smaller, that is, the circumferential arc length of the end where the clamping claw first contacts the installation port is the smallest, and it is less likely to interfere with each other. Third, the radial thickness of the clamping claw is also gradually reduced in the axial direction from the fixed end to the free end, that is, the closer to the end that first contacts the installation port, the smaller the radial thickness of the free end is, and the better the ability to deform in the radial direction is. In summary, the clamping claw of the utility model has better deformation ability and larger deformation space, and can better adapt to complex installation environments.

[0011] Preferably, the inner edge of one end of the fixed end close to the free end is on a first imaginary circle with the central axis of the valve body as the center, and the inner edge of one end of the free end away from the main body is on a second imaginary circle with the central axis of the valve body as the center, and the diameter of the first imaginary circle is smaller than the diameter of the second imaginary circle; thus, the closer to the end where the claw first contacts the installation port, the larger the internal space size of the claw, and relative to the inner diameter of the fixed end, the free end has a larger radial deformation space, thereby improving the deformation ability of the claw and avoiding the free ends from interfering with each other too early during the installation process, which increases the difficulty of installation.

[0012] Preferably, the outer peripheral wall of the claw is parallel to the central axis of the valve body in the direction of extension from the end close to the waterproof breathable membrane to the end away from the waterproof breathable membrane;

[0013] The inner peripheral wall of the clamping claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a first slope.

[0014] With the above structure, the radial thickness of the claw gradually decreases and the deformation capacity gradually increases as the claw is farther away from the waterproof breathable membrane; the processing difficulty of the claw is relatively low, and the claw will naturally expand outward after being inserted into the installation opening of the shell, so that the waterproof breathable valve is fixed more firmly.

[0015] Preferably, the outer peripheral wall of the claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a second slope with the central axis of the valve body;

[0016] The inner peripheral wall of the claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a third slope with the central axis of the valve body;

[0017] The second slope is greater than the third slope.

[0018] With the above structure, the radial thickness of the claw gradually decreases and the deformation capacity gradually increases as the claw is further away from the waterproof breathable membrane; after a sealing ring is sleeved on the outer peripheral wall of the claw, the compression deformation of the sealing ring will increase after being subjected to water pressure, and the contact sealing area between the sealing ring and the outer peripheral wall of the claw will increase, which can better achieve a waterproof effect.

[0019] Preferably, the outer peripheral wall of the claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane toward a direction close to the central axis, and has a fourth slope;

[0020] The inner peripheral wall of the clamping claw extends from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction parallel to the central axis of the valve body.

[0021] Similarly, the inner circumferential wall of the claw is parallel to the central axis, and the outer circumferential wall has a fourth slope. As a result, the inner and outer circumferential walls of the claw are also relatively inclined, so that the inner and outer circumferential walls of the claw gradually approach each other along the axial direction from the end close to the waterproof breathable membrane to the end away from the waterproof breathable membrane, the radial thickness of the claw gradually decreases, and the deformation capacity gradually increases.

[0022] Preferably, the outer peripheral wall of the free end protrudes along the circumferential direction to form a block, the block is located at one end of the free end away from the main body, and both ends of the block along the circumferential direction are formed with avoidance portions for reducing the interference area.

[0023] The avoidance portion forms a default structure from both ends of the outer circumference of the clamping block to the inside, thereby reducing the interference area, reducing the probability of interference, and improving the stability of the clamping claw.

[0024] Preferably, the waterproof breathable valve also includes a sealing ring, which is sleeved on the outer periphery of the claw, and the sealing ring is in contact with the outer peripheral wall of the claw to form a sealing contact area. The axial spacing between the sealing contact area and the main body is recorded as L1, and the minimum axial spacing between the first notch and the main body is recorded as L2, wherein L1<L2.

[0025] The above structural setting can reduce the contact between the sealing ring and the first notch. The sealing ring can form a complete annular sealing contact area with the area of ​​the claw having a complete outer peripheral wall, thereby achieving abutment sealing and ensuring sealing performance.

[0026] Preferably, a first rounded corner structure for reducing deformation stress concentration is formed at both ends of the connection between the free end and the fixed end along the circumferential direction, which can improve the strength of the claw part when it is deformed and is less likely to break to a certain extent.

[0027] Preferably, the circumferential arc length between two adjacent free ends away from the end of the main body is recorded as L3, and the circumferential arc length of the free end away from the end of the main body is recorded as L4, wherein the value range of L3 / L4 is 0.7-1.3.

[0028] Preferably, a second rounded corner structure for increasing the sealing area is formed along the circumferential direction at the connection between the outer wall of the fixed end and the main body. The function of the second rounded corner structure is that, compared with the angular structure, the rounded corner structure enables the sealing ring to better fit the connection between the outer wall of the fixed end and the main body after compression deformation.

[0029] A waterproof breathable valve assembly, comprising the waterproof breathable valve and a housing, wherein the housing is provided with an installation opening for installing the waterproof breathable valve, the housing is provided with a fixing surface on a side of the installation opening close to an internal space, a sealing ring is sealed with an inner peripheral wall of the installation opening by extrusion, and a clamping block of the clamping claw is in conflict with the fixing surface;

[0030] The aperture of the mounting port is set to remain unchanged along the axial direction from the external space of the shell to the internal space of the shell; or, the aperture of the mounting port is set to decrease along the axial direction from the external space of the shell to the internal space of the shell; or, the aperture of the mounting port is set to first decrease and then remain unchanged along the axial direction from the external space of the shell to the internal space of the shell.

[0031] Through the cooperation between the above waterproof breathable valve and the installation opening of the shell, the waterproof breathable function of the shell can be well achieved, and a good sealing effect can be achieved between the waterproof breathable valve and the installation opening of the shell.

[0032] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0033] First, the opening curvature of the first notch formed between adjacent free ends is gradually enlarged in the axial direction from the fixed end to the free end, that is, the opening curvature of the first notch at the end where the claw first contacts the installation port is larger, which means that the closer the claw is to the free end, the larger its circumferential deformation space is; second, based on the circumferential spacing of the free ends, the opening curvature of the first notch becomes larger, and the circumferential arc length of the free end becomes smaller, that is, the circumferential arc length of the end where the claw first contacts the installation port is the smallest, and it is less likely to interfere with each other; third, the radial thickness of the claw is also gradually reduced in the axial direction from the fixed end to the free end, that is, the closer to the end that first contacts the installation port, the smaller the radial thickness of the free end is, and the better the ability to deform radially; in summary, the claw of the utility model has better deformation ability and larger deformation space, and can better adapt to complex installation environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a waterproof breathable valve according to an embodiment of the utility model;

[0036] Figure 2 A schematic diagram of the waterproof breathable valve of the embodiment of the utility model from another angle;

[0037] Figure 3 This is a bottom schematic diagram of a waterproof breathable valve according to an embodiment of the utility model installed on a housing;

[0038] Figure 4 for Figure 3 The cross-sectional view at AA in FIG.

[0039] Figure 5 for Figure 3 The cross-sectional view at BB in FIG.

[0040] Figure 6 This is a schematic cross-sectional structure diagram of a waterproof breathable valve according to Embodiment 1 of the present utility model;

[0041] Figure 7 This is a schematic cross-sectional structure diagram of a waterproof breathable valve according to Embodiment 2 of the present utility model;

[0042] Figure 8 This is a schematic cross-sectional structure diagram of a waterproof breathable valve according to Embodiment 3 of the present utility model;

[0043] Fig. 9 It is a schematic cross-sectional structure diagram of a first implementation mode of a waterproof breathable component according to an embodiment of the utility model;

[0044] Fig.10 It is a cross-sectional structural schematic diagram of a second implementation mode of the waterproof breathable component of the utility model embodiment;

[0045] Fig.11 It is a cross-sectional structural schematic diagram of a third implementation mode of the waterproof breathable component of the utility model embodiment;

[0046] Fig.12 It is a schematic diagram of a breathable valve in the related art.

[0047] Description of Reference Numerals

[0048] 10. Valve cover; 11. Buckle; 12. Ventilation area;

[0049] 20. valve body; 21. main body; 22. claw; 221. fixed end; 222. free end; 223. first notch; 224. outer peripheral wall; 225. inner peripheral wall; 226. block; 227. avoidance portion; 228. first fillet structure; 229. second fillet structure; 23. air permeable channel; 24. first imaginary circle; 25. second imaginary circle;

[0050] 30. Waterproof and breathable membrane;

[0051] 40. housing; 41. mounting opening;

[0052] 50. Sealing ring; 51. Sealing contact area;

[0053] 60. Slit;

[0054] 70. Fixed surface. DETAILED DESCRIPTION

[0055] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] As attached Figures 1 to 5 As shown, the waterproof breathable valve of the utility model embodiment is installed in the installation port 41 of the housing 40 to exchange internal and external gases and achieve internal and external pressure balance at the installation component. Figure 1 Only a part of the housing 40 is shown. The waterproof breathable valve of the embodiment of the utility model can be applied to equipment that needs to be waterproof and breathable, such as automotive. In theory, it can be used in any place where the components in the vehicle need to be waterproof and breathable, including battery packs, electronic controls, inverters, engine controllers, gearbox controllers, steering controllers, domain controllers, thermal management controllers, etc. Its main function is to achieve waterproof and breathable functions, balance the internal and external pressure differences, prevent solid particles and oil from entering the housing 40, ensure that the housing 40 is dry, and prevent the housing 40 from corrosion.

[0059] The waterproof breathable valve comprises a valve cover 10, a valve body 20 and a waterproof breathable membrane 30. The valve body 20 comprises a main body 21 and a claw 22. The valve body 20 has a breathable passage 23 which penetrates the main body 21 and the claw 22. The claw 22 cooperates with the mounting opening 41 of the housing 40 to fix the breathable valve on the housing 40. The valve cover 10 is fixedly mounted on the main body 21, and a ventilation area 12 is formed between the valve cover 10 and the main body 21. The waterproof breathable membrane 30 is fixed on the main body 21 and covers the breathable passage 23. The breathable area 12 is connected to the breathable passage 23 through the waterproof breathable membrane 30. The valve cover 10 cooperates with the valve body 20 to wrap the waterproof breathable membrane 30 between the valve cover 10 and the valve body 20, and protects the waterproof breathable membrane 30. The valve cover 10 and the valve body 20 can be a split structure or an integrated structure; when the valve cover 10 and the valve body 20 are a split structure, the valve cover 10 can be connected to the valve body 20 through the buckles 11, and a ventilation area 12 is formed between adjacent buckles 11; when the valve cover 10 and the valve body 20 are an integrated structure, the valve cover 10 and the valve body 20 can reserve a ventilation area 12 during manufacturing.

[0060] It should be noted that in the following embodiments, in a top view, the valve cover 10, the valve body 20 and the waterproof breathable membrane 30 are circular, the axial direction refers to the direction of the central axis of the valve body 20, the circumferential direction refers to the circumferential direction of a circle drawn with the central axis as the center, and the radial direction refers to the radial direction of a circle drawn with the central axis as the center.

[0061] As attached Figure 6 As shown, the claw 22 of this embodiment includes a fixed end 221 and a free end 222, one end of the fixed end 221 is connected to the main body 21, and the other end is connected to the free end 222, a first notch 223 is formed between adjacent free ends 222, and the fixed end 221 and the free end 222 are divided by the plane where the highest point of the first notch 223 in the axial direction is located (i.e., the dotted line in the figure), the part above the dividing line is the fixed end 221, and the part below the dividing line is the free end 222.

[0062] A first notch 223 is formed between adjacent free ends 222. Figure 2As shown, in the upward state, the claw 22 is arranged on a circumference with the central axis as the center, and the free end 222 and the first notch 223 are arranged circumferentially at intervals, corresponding to the circular installation opening 41. The opening arc of the first notch 223 is gradually enlarged from the fixed end 221 to the free end 222 along the axial direction, that is, the opening arc of the first notch 223 at the end of the claw 22 that first contacts the installation opening 41 is larger, which means that the closer the claw 22 is to the free end 222, the larger its circumferential deformation space; the opening arc of the first notch 223 becomes larger, and the circumferential arc length of the free end 222 becomes smaller, that is, the circumferential arc length of the end of the claw 22 that first contacts the installation opening 41 is the smallest, and it is less likely to interfere with each other. Based on the above two points, even if the vent valve is clamped into the installation opening 41 in a relatively inclined state, one free end 222 first contacts the inner wall of the installation opening 41, and the other free ends 222 also have sufficient residual deformation space and will not interfere with each other. At the same time, the radial thickness of the claw 22 is gradually reduced from the fixed end 221 to the free end 222 along the axial direction, that is, the closer to the end that first contacts the installation port 41, the smaller the radial thickness of the free end 222, and the better the ability to deform in the radial direction. In summary, the claw 22 has good deformation ability and a large deformation space, good comprehensive deformation performance, and can better adapt to complex installation environments; especially when the claw 22 cannot be directly clamped into the installation port 41, the claw 22 needs to be clamped into the installation port 41 at a relatively inclined angle, or when the size of the claw 22 is similar to the size of the installation port 41, the claw of the air-permeable valve in the utility model can have good deformation ability to adapt to the above special application scenarios.

[0063] There are many ways to gradually reduce the radial thickness of the claw 22 from the fixed end 221 to the free end 222 along the axial direction, which are briefly described below with several embodiments. It should be noted that the slope in the following embodiments refers to the amount of inclination of a straight line (or the tangent of a curve) with respect to the (horizontal) coordinate axis, and the absolute value is taken. The horizontal coordinate axis in the following embodiments is the horizontal axis perpendicular to the central axis.

[0064] As attached Figure 6 In the first embodiment shown, the outer peripheral wall 224 of the clamping claw 22 extends from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in a direction parallel to the central axis of the valve body 20; the inner peripheral wall 225 of the clamping claw 22 is inclined in the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in a direction away from the central axis, and has a first slope. Since the outer peripheral wall 224 of the clamping claw 22 is parallel to the central axis and the inner peripheral wall 225 has the first slope, the inner and outer peripheral walls 224 of the clamping claw 22 are also relatively inclined, so that the inner and outer peripheral walls 224 of the clamping claw 22 gradually approach each other in the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30, that is, the radial thickness of the clamping claw 22 gradually decreases and the deformation capacity gradually increases as it is further away from the waterproof breathable membrane 30.

[0065] In this embodiment, the first slope is the ratio of the axial distance between the two end points of the inner circumferential wall 225 of the claw 22 in the axial direction to the radial distance between the two end points on the horizontal axis, and the value range of the first slope is 1-50; if the value of the first slope is too small, the inner circumferential wall 225 of the claw 22 is too inclined outward, which may easily cause the radial thickness of the free end 222 that first abuts against the mounting port 41 to be too thin, which may cause the structural strength of the claw 22 to be insufficient, and then the free end 222 may be easily broken when the force applied during installation is large; and, in order to ensure that the radial thickness of the free end 222 is not easy to break, it is necessary to control the radial thickness of the free end 222 to have a certain value. At the same time, if the inner circumferential wall 225 of the claw 22 is still too inclined outward, the force required for the deformation of the free end will be large, which makes it inconvenient to install the claw 22 in the mounting port 41; if the value of the first slope is too large, the inner circumferential wall 225 of the claw 22 is not inclined outward enough, and the change in deformation capacity is not large.

[0066] It should be noted that “tilting outward” refers to tilting in a direction away from the central axis on a vertical section passing through the central axis; “tilting inward” refers to tilting in a direction close to the central axis on a vertical section passing through the central axis.

[0067] In this embodiment, as shown in the attached Figure 3 As shown, based on the outward inclination of the inner circumferential wall 225 of the claw 22, the inner edge of the end of the fixed end 221 close to the free end 222 is on a first imaginary circle 24 with the central axis of the valve body 20 as the center, and the inner edge of the end of the free end 222 away from the main body 21 is on a second imaginary circle 25 with the central axis of the valve body 20 as the center, and the diameter of the first imaginary circle 24 is smaller than the diameter of the second imaginary circle 25, that is, the inner edge circle diameter close to the free end 222 of the claw 22 is larger; therefore, the closer to the end of the claw 22 that first contacts the installation port 41, the larger the internal space size of the claw 22, and relative to the inner diameter of the fixed end 221, the free end 222 has a larger radial deformation space, thereby improving the deformation ability of the claw 22 and avoiding the free ends 222 from interfering with each other too early during the installation process, thereby increasing the difficulty of installation.

[0068] As attached Figure 7In the second embodiment shown, the outer peripheral wall 224 of the clamping claw 22 is inclined along the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in the direction away from the central axis, and has a second slope; the inner peripheral wall 225 of the clamping claw 22 is inclined along the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in the direction away from the central axis, and has a third slope; the second slope is greater than the third slope. As a result, the inner and outer peripheral walls 224 of the clamping claw 22 are also relatively inclined; and the second slope is greater than the third slope, then the inner and outer peripheral walls 224 of the clamping claw 22 gradually move closer along the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30, the radial thickness of the clamping claw 22 gradually decreases, and the deformation capacity gradually increases. After the sealing ring 50 is sleeved on the outer peripheral wall 224 of the claw 22 of this embodiment and assembled in the installation port 41, the sealing ring 50 will move to the end away from the waterproof breathable membrane 30 under the water pressure. At this time, the compression deformation of the sealing ring will increase. The farther the outer peripheral wall 224 is away from the waterproof breathable membrane 30, the larger its outer diameter is, and the contact sealing area between the sealing ring 50 and the outer peripheral wall 224 of the claw 22 increases, which can better achieve the waterproof effect.

[0069] In this embodiment, the second slope is the ratio of the axial distance between the two end points of the outer peripheral wall 224 of the claw 22 in the axial direction to the radial distance between the two end points on the horizontal axis, and the third slope is the ratio of the axial distance between the two end points of the inner peripheral wall 225 of the claw 22 in the axial direction to the radial distance between the two end points on the horizontal axis. The value range of the second slope is 2-50, and the value range of the third slope is 1-45. The difference between the second slope and the third slope can be adjusted according to the radial thickness of the free end 222 of the claw 22, preferably 0.5-40, to ensure that the free end 222 of the claw 22 has a suitable deformation capacity; if the value of the second slope is too small, the outer peripheral wall 224 of the claw 22 is too inclined outward, which may increase the difficulty of aligning the claw 22 with the mounting opening 41 during installation, and the sealing ring 50 is not easy to be set on the outer peripheral wall 224 of the claw 22; if the value of the second slope and the value of the third slope are both too small, the outer peripheral wall 224 and the inner peripheral wall 225 of the claw 22 If both are tilted too outward, it may cause the claw 22 to be deformed and installed into the installation port 41 with a large force, and the deformation range of the claw 22 is too large, making it inconvenient for the claw 22 to be installed into the installation port 41, and the claw 22 is also prone to breakage due to excessive deformation; if the difference between the second slope and the third slope is too small, the radial thickness of the claw 22 is not thin enough, which may cause the deformation ability of the claw 22 to change little; if the difference between the second slope and the third slope is too large, it is easy to cause the radial thickness of the free end 222 that first abuts against the installation port 41 to be too thin, resulting in insufficient structural strength, and then the free end 222 breaks when the force applied during installation is large.

[0070] In this embodiment, based on the outward inclination of the inner circumferential wall 225 of the claw 22, the inner edge of the end of the fixed end 221 close to the free end 222 is on a first imaginary circle 24 with the central axis of the valve body 20 as the center, and the inner edge of the end of the free end 222 away from the main body 21 is on a second imaginary circle 25 with the central axis of the valve body 20 as the center. The diameter of the first imaginary circle 24 is smaller than the diameter of the second imaginary circle 25, that is, the diameter of the inner edge circle close to the free end 222 of the claw 22 is larger; therefore, the closer to the end of the claw 22 that first contacts the installation port 41, the larger the internal space size of the claw 22, and relative to the inner diameter of the fixed end 221, the free end 222 has a larger radial deformation space, thereby improving the deformation ability of the claw 22 and avoiding the free ends 222 from interfering with each other too early during the installation process, thereby increasing the difficulty of installation.

[0071] As attached Figure 8 In the third embodiment shown, the outer peripheral wall 224 of the claw 22 is inclined in the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in the direction close to the central axis, and has a fourth slope; the inner peripheral wall 225 of the claw 22 extends from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30 in a direction parallel to the central axis of the valve body 20. In this embodiment, the inner peripheral wall 225 of the claw 22 is parallel to the central axis, and the outer peripheral wall 224 has a fourth slope, thereby, the inner and outer peripheral walls 224 of the claw 22 are also relatively inclined, so that the inner and outer peripheral walls 224 of the claw 22 gradually approach each other in the axial direction from the end close to the waterproof breathable membrane 30 to the end away from the waterproof breathable membrane 30, the radial thickness of the claw 22 gradually decreases, and the deformation capacity gradually increases.

[0072] In this embodiment, the fourth slope is the ratio of the axial distance between the two end points of the outer peripheral wall 224 of the claw 22 in the axial direction to the radial distance between the two end points on the horizontal axis. The value range of the fourth slope is 1-50. At this time, the setting of the claw 22 is relatively easier to align with the installation port 41 and install compared with the above embodiment; if the value of the fourth slope is too small, the outer peripheral wall 224 of the claw 22 is too inclined inward. On the one hand, the tangent direction of the sealing ring 50 and the outer peripheral wall 224 of the claw 22 is inclined inward, which is inconvenient for testing and measurement. On the other hand, when the waterproof breathable valve is subjected to water pressure, it will have a force on the sealing ring 50, and the diameter of the outer peripheral wall 224 of the claw 22 is smaller towards the free end 222, which will cause the deformation of the sealing ring 50 to decrease, thereby affecting the sealing and waterproof effect; if the value of the fourth slope is too large, the radial thickness of the claw 22 is not thinned enough, the deformation capacity does not change much, and the deformation capacity of the claw 22 is weak.

[0073] In this embodiment, the inner edge of the fixed end 221 close to the free end 222 is located on a first imaginary circle 24 with the central axis of the valve body 20 as the center, and the inner edge of the free end 222 away from the main body 21 is located on a second imaginary circle 25 with the central axis of the valve body 20 as the center, and the diameters of the first imaginary circle 24 and the second imaginary circle 25 are the same.

[0074] Based on the above embodiments, as shown in the attached Figure 3 and attached Figure 4 As shown, the outer peripheral wall 224 of the free end 222 of the claw 22 protrudes along the circumferential direction to form a clamping block 226, and the clamping block 226 is located at one end of the free end 222 away from the main body 21. The two ends of the clamping block 226 along the circumferential direction are formed with avoidance portions 227 for reducing the interference area. During the installation process of the waterproof breathable valve, the two ends of the clamping block 226 along the circumferential direction are least likely to deform and enter the installation port 41, and are also most likely to interfere with the inner wall of the installation port 41. Therefore, avoidance portions 227 are formed at these two ends. The avoidance portions 227 form a default structure from the two ends of the outer circumference of the clamping block 226 to the inside, thereby reducing the interference area, reducing the probability of interference, and improving the stability of the claw 22. The avoidance portion 227 can be a rounded structure or a chamfered structure, wherein the default structure means that the two ends of the claw 226 can form the avoidance portion 227 by, for example, chamfering or cutting off a part.

[0075] As attached Figure 4 and attached Figure 5 As shown, the waterproof breathable valve of the embodiment of the utility model also includes a sealing ring 50, which is sleeved on the outer periphery of the claw 22. The sealing ring 50 contacts the outer peripheral wall 224 of the claw 22 and forms a sealing contact area 51. The axial spacing between the sealing contact area 51 and the main body 21 is recorded as L1, and the minimum axial spacing between the first notch 223 and the main body 21 is recorded as L2, wherein L1<L2. It should be noted that the axial spacing L1 between the sealing contact area 51 and the main body 21 refers to the axial spacing between the side of the sealing contact area 51 close to the main body 21 and the main body 21. Therefore, the sealing ring 50 can cooperate with the outer peripheral wall 224 of the fixed end 221 of the claw 22 to form a sealing contact area 51 with a complete annular sealing surface. The complete annular sealing surface is used to achieve abutment sealing between the waterproof air valve and the mounting port 41 of the shell 40 to ensure the sealing performance. Therefore, even if part of the sealing ring 50 contacts the first notch 223 after deformation, it will not affect the sealing performance. On the other hand, it can also make the sealing ring 50 closer to the main body and away from the first notch 223, reduce the contact between the sealing ring 50 and the first notch 223, and make the effective sealing area of ​​the sealing ring 50 larger.

[0076] As attached Figure 4As shown, in this embodiment, the free end 222 needs to be deformed, and stress will be generated during the deformation process. A first rounded structure 228 for reducing deformation stress concentration is formed at both ends of the connection between the free end 222 and the fixed end 221 along the circumferential direction. The stress concentration factor of the rounded structure is small. Compared with the pointed structure with a larger stress concentration factor, the first rounded structure 228 can increase the strength of the claw 22 when it is deformed, avoid stress concentration, and make the free end 222 less likely to break to a certain extent.

[0077] As attached Figure 4 As shown, in this embodiment, a second rounded structure 229 for increasing the sealing area is formed along the circumferential direction at the connection between the outer wall of the fixed end 221 and the main body 21. The outer wall of the fixed end 221 is mainly used to sleeve the sealing ring 50. Compared with the setting of the edges and corners, the setting of the rounded corners can make the sealing ring 50 better fit the connection between the outer wall of the fixed end 221 and the main body 21 after compression deformation. If the setting of the edges and corners is adopted, no matter how the sealing ring 50 is deformed, it is impossible to fit the connection between the outer wall of the fixed end 221 and the main body 21. The setting of the second rounded structure 229 can increase the sealing between the sealing ring 50 and the valve body 20 to a certain extent.

[0078] As attached Figure 3 As shown, based on the circumferential spacing of the free ends 222 and the first notches 223, the circumferential arc length between the ends of the two adjacent free ends 222 away from the main body 21 is recorded as L3, and the circumferential arc length of the free end 222 away from the end of the main body 21 is recorded as L4. The circumferential arc length L3 between the ends of the two adjacent free ends 222 away from the main body 21 means that the first notch 223 is formed by the circumferential side walls of the two free ends 222, and the inner edges of the circumferential side walls of the two adjacent free ends 222 are on the second imaginary circle 25 with the central axis of the valve body 20 as the center at the end away from the main body 21, and the circumferential arc length of the first notch 223 corresponding to the imaginary circle is L3; the circumferential arc length L4 of the end of the free end 222 away from the main body 21 refers to the circumferential arc length of the edge arc of the inner wall of the free end 222 at the end away from the main body 21. The ratio of the corresponding circumferential arc lengths of the free end 222 and the first notch 223 on the second imaginary circle 25 determines the deformation space of the claw 22, thereby affecting the deformation performance of the claw 22. In this embodiment, the value range of L3 / L4 is 0.7-1.3. If the value is lower than this range, the opening arc of the first notch 223 is insufficient, the deformation space is insufficient, and the free ends 222 are easy to interfere with each other during the deformation process; if the value is higher than this range, the circumferential arc length of the free end 222 is insufficient, the structural strength is weak, and it cannot withstand a large installation force and is easy to break.

[0079] Since the number of free ends 222 is the same as the number of first notches 223, the above requirements are met regardless of the ratio of the circumferential arc length L4 of a single free end 222 to the circumferential arc length L3 corresponding to a single first notch 223 or the ratio of the total circumferential arc length of all free ends 222 to the circumferential arc length corresponding to all first notches 223. In this embodiment, the number of free ends 222 is three, and the number of first notches 223 is also three; in other embodiments, the number of free ends 222 may be 2, 4, 5, etc., and correspondingly, the number of first notches 223 is also 2, 4, 5, etc.

[0080] As attached Figure 5 As shown, the embodiment of the utility model also discloses a waterproof breathable valve assembly, which is composed of the waterproof breathable valves of the above embodiments and a housing 40, wherein the attached Figure 5 Only a part of the housing 40 is shown. The housing 40 is provided with an installation port 41 for installing the waterproof breathable valve. The installation port 41 communicates the internal space and the external space of the housing 40. In this embodiment, the aperture of the installation port 41 first decreases linearly from the external space of the housing 40 to the internal space of the housing 40 along the axial direction and then remains unchanged; of course, in other embodiments, the aperture of the installation port 41 can be set unchanged along the axial direction from the external space of the housing 40 to the internal space of the housing 40, that is, the inner peripheral wall of the installation port 41 is a cylindrical side surface (see the attached Fig. 9 The aperture of the mounting opening 41 may also be arranged to decrease in the axial direction from the outer space of the housing 40 to the inner space of the housing 40, wherein the aperture of the mounting opening 41 may decrease linearly (see the attached Fig.10 ); Of course, the aperture of the mounting port 41 may also be other variations, such as Fig.11 As shown, the diameter of the installation opening 41 can be gradually reduced and then kept constant along the axial direction from the outer space of the housing 40 to the inner space of the housing 40. The shape of the installation opening 41 is mainly to achieve extrusion sealing between the waterproof breathable valve and the installation opening 41.

[0081] The axial direction refers to the direction of the central axis of the installation port 41. The aperture of the installation port 41 may be reduced in a linear manner, in a gradient manner, or in other irregular reduction trends, and may be adaptively adjusted to achieve excellent extrusion sealing between the installation port 41 and the waterproof breathable valve.

[0082] A fixing surface 70 is formed on one side of the mounting opening 41 of the shell 40 close to the internal space. When the waterproof breathable valve is installed and fixed to the mounting opening 41 of the shell 40, the sealing ring 50 and the inner peripheral wall of the mounting opening 41 are sealed by extrusion, and the surface of the block 226 of the claw 11 close to the main body 21 along the axial direction contacts the fixing surface 70, thereby allowing the waterproof breathable valve to be better installed in the mounting opening 41 of the shell 40.

[0083] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A waterproof breathable valve, comprising a valve cover, a valve body and a waterproof breathable membrane, wherein the valve body has a breathable passage, the valve body comprises a main body and a claw, the valve cover is fixedly mounted on the main body, and a ventilation area is formed between the valve cover and the main body, the waterproof breathable membrane is fixed on the main body and covers the breathable passage, characterized in that: The claw comprises a fixed end and a free end, one end of the fixed end is connected to the main body, and the other end is connected to the free end, a first notch is formed between adjacent free ends, and the opening curvature of the first notch is gradually enlarged from the fixed end to the free end along the axial direction; The radial thickness of the claw is gradually reduced from the fixed end to the free end along the axial direction.

2. The waterproof breathable valve according to claim 1, characterized in that: The inner edge of the fixed end close to the free end is located on a first imaginary circle with the central axis of the valve body as the center, and the inner edge of the free end away from the main body is located on a second imaginary circle with the central axis of the valve body as the center, and the diameter of the first imaginary circle is smaller than the diameter of the second imaginary circle.

3. The waterproof breathable valve according to claim 1, characterized in that: The outer peripheral wall of the claw extends from one end close to the waterproof breathable membrane to one end away from the waterproof breathable membrane in a direction parallel to the central axis of the valve body; The inner peripheral wall of the clamping claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a first slope.

4. The waterproof breathable valve according to claim 1, characterized in that: The outer peripheral wall of the claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a second slope; The inner peripheral wall of the claw is inclined in the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction away from the central axis, and has a third slope; The second slope is greater than the third slope.

5. The waterproof breathable valve according to claim 1, characterized in that: The outer peripheral wall of the claw is inclined along the axial direction from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane toward a direction close to the central axis, and has a fourth slope; The inner peripheral wall of the clamping claw extends from an end close to the waterproof breathable membrane to an end away from the waterproof breathable membrane in a direction parallel to the central axis of the valve body.

6. The waterproof breathable valve according to claim 1, characterized in that: The outer peripheral wall of the free end protrudes along the circumferential direction to form a block, and the block is located at one end of the free end away from the main body. Both ends of the block along the circumferential direction are formed with avoidance parts for reducing the interference area.

7. The waterproof breathable valve according to claim 1, characterized in that: It also includes a sealing ring, which is sleeved on the outer periphery of the claw, and the sealing ring contacts the outer peripheral wall of the claw to form a sealing contact area. The axial distance between the sealing contact area and the main body is recorded as L1, and the minimum axial distance between the first notch and the main body is recorded as L2, wherein L1<L2.

8. The waterproof breathable valve according to claim 1, characterized in that: A first rounded structure for reducing deformation stress concentration is formed at both ends of the connection between the free end and the fixed end along the circumferential direction.

9. The waterproof breathable valve according to claim 1, characterized in that: The circumferential arc length between two adjacent free ends away from the end of the main body is recorded as L3, and the circumferential arc length of the free end away from the end of the main body is recorded as L4, wherein the value range of L3 / L4 is 0.7-1.

3.

10. The waterproof breathable valve according to claim 1, characterized in that: A second fillet structure for increasing a sealing area is formed along a circumferential direction at a connection between the outer wall of the fixed end and the main body.

11. A waterproof breathable valve assembly, comprising the waterproof breathable valve according to any one of claims 1 to 10 and a housing, characterized in that: The housing is provided with an installation opening for installing the waterproof breathable valve, and the housing is provided with a fixing surface on one side of the installation opening close to the internal space, the sealing ring and the inner peripheral wall of the installation opening are sealed by extrusion, and the clamping block of the clamping claw is in conflict with the fixing surface; The aperture of the mounting opening is arranged to be constant along the axial direction from the outer space of the shell to the inner space of the shell; Alternatively, the aperture of the mounting opening is arranged to decrease in the axial direction from the outer space of the shell to the inner space of the shell; Alternatively, the aperture of the mounting opening is first reduced and then remains unchanged along the axial direction from the external space of the shell to the internal space of the shell.

Images