TW202411557A - Porous pressure relief valve with waterproof - Google Patents

Abstract

A porous pressure relief valve with waterproof is provided. The porous pressure relief valve includes a pressure relief valve body, an annular post and a waterproof breathable membrane. The pressure relief valve body is connected with a casing of an electronic device, the casing has an inner space, and the pressure relief valve body has an inner surface facing the inner space and an outer surface back the inner space. The pressure valve body is also provided with a plurality of air holes. The annular post is protruding from the inner surface along a first direction toward the inner space, and a groove is formed along a second direction opposite to the first direction, and the air hole is communicated with an outer edge of the groove. The waterproof breathable membrane is disposed on the annular post to close the groove. Then, when the air pressure in the inner space is greater than the air pressure outside the casing, part of a gas is discharged from the inner space through the waterproof breathable membrane, grooves and air holes to reduce the internal air pressure.

Description

Multi-hole waterproof pressure relief valve

The present invention relates to a pressure relief valve, and more particularly to a porous waterproof pressure relief valve.

In recent years, technology has developed rapidly, and a variety of electronic products can be seen everywhere in daily life, which has greatly improved people's living standards. In order to allow users to use electronic devices in various environments, most electronic devices are designed for various environments; among them, rainy days or humid environments have the most serious impact on electronic devices.

As mentioned above, in order to prevent the electronic components inside the electronic devices from being affected by moisture, the electronic devices are usually sealed to prevent these electronic devices from being used normally even on rainy days. However, when using electronic devices, it is still possible that due to vibration or impact, or even incomplete sealing, rainwater may enter the internal space of the electronic device through the gaps, especially for navigation devices or dashcams that are often exposed to the outside. As a result, due to the sealing design, the rainwater cannot be discharged smoothly and accumulates at the bottom of the internal space. Then, when the electronic device generates heat due to operation or is exposed to the sun when the weather clears, the rainwater accumulated in the electronic device will evaporate into water vapor. However, because it cannot be discharged, the electronic components inside the electronic device are easily corroded by water vapor, which will reduce the service life of the electronic device over time. It is even possible that the shell of the electronic device will swell due to excessive internal water vapor pressure, affecting the safety of use.

In order to solve the problem of waterproofing and excessive pressure of electronic devices, the existing method is to install a waterproof pressure relief valve on the housing of the electronic device to prevent rainwater from entering the electronic device and allow the gas inside and outside the electronic device to circulate to maintain pressure balance. Among them, the existing waterproof pressure relief valve mainly opens a hole on the housing of the electronic device and then seals the hole with a waterproof breathable membrane. However, in order to prevent external water from directly spraying into the hole and destroying the sealing of the waterproof breathable membrane, some water-blocking structures are usually provided at the hole connected to the outside to prevent water from spraying.

However, although the water-blocking structure used to prevent external water jets can prevent the direct impact of the water flow, it is easy for the water to splash around when the water flow hits the water-blocking structure and accumulate between the water-blocking structure and the waterproof breathable membrane, and cannot be discharged smoothly.

In view of the fact that in the prior art, the existing waterproof pressure relief valve can use a water-blocking structure to prevent water flow from directly impacting the waterproof breathable membrane, but it is easy for water to accumulate between the water-blocking structure and the waterproof breathable membrane and cannot be discharged smoothly; therefore, the main purpose of the present invention is to provide a porous waterproof pressure relief valve, which can not only effectively prevent water flow from directly impacting the waterproof breathable membrane, but also allow water flow to be discharged smoothly without the problem of accumulation.

The present invention is to solve the problems of the prior art. The necessary technical means adopted is to provide a porous waterproof pressure relief valve, which is applied to an electronic device. The porous waterproof pressure relief valve includes a pressure relief valve body, an annular protrusion and a waterproof breathable membrane.

The pressure relief valve body is integrally connected to a housing of the electronic device, the housing encloses an internal space, and the pressure relief valve body has an inner side surface and an outer side surface facing and facing away from the internal space respectively, and the pressure relief valve body is also provided with a plurality of vent holes penetrating from the outer side surface to the inner side surface.

The annular protrusion protrudes from the inner side surface toward the inner space along a first direction, and a groove is opened along a second direction opposite to the first direction, and the air hole is connected to the outer edge of the groove.

The waterproof breathable membrane is arranged on the annular protrusion and is used to close the groove. When the internal air pressure of a gas in the internal space is greater than the external air pressure outside the shell, part of the gas is discharged from the internal space through the waterproof breathable membrane, the groove and the vent hole in sequence to the outside of the shell to reduce the internal air pressure.

In an auxiliary technical means derived from the above necessary technical means, the groove further has a central axis parallel to the first direction, and the vent holes are distributed around the central axis.

Preferably, the groove has a radius length extending from the central axis to the inner wall of the groove, each vent hole has a hole edge length extending from the central axis to the outer edge of each vent hole, and the hole edge length is greater than the radius length.

In addition, the hole edge length further includes at least one outer length and at least one inner length, the at least one outer length is adjacent to the outer surface, the at least one inner length is farther from the outer surface than the at least one outer length, and the at least one outer length is greater than or equal to the at least one inner length.

In an auxiliary technical means derived from the above necessary technical means, an annular connecting channel is further provided on the inner wall of the annular protrusion, and the annular connecting channel is respectively connected to the groove and the vent hole.

In an auxiliary technical means derived from the above necessary technical means, the annular protrusion is integrally formed from the inner side surface and protrudes toward the inner space along the first direction.

In an auxiliary technical means derived from the above necessary technical means, the annular protrusion further has an end protrusion ring protruding along the first direction, the end protrusion ring is formed at the end of the annular protrusion to form a concave space connected to the groove, and the waterproof breathable membrane is fixed in the concave space.

In an auxiliary technical means derived from the above necessary technical means, each vent hole is an arc-shaped through hole.

In this embodiment, the electronic device of the present invention is, for example, a vehicle-mounted device of a bicycle or a motorcycle.

As described above, the present invention mainly connects the air holes to the edge of the groove to form a two-stage space structure, which effectively prevents water flow from directly impacting the waterproof breathable membrane used to seal the groove. Moreover, since the plurality of air holes of the present invention are connected to the outer edge of the groove, the water flow can be discharged more smoothly compared to the air holes located below the groove.

The specific embodiments of the present invention will be further described by the following embodiments and drawings.

Please refer to the first and second figures. The first figure is a three-dimensional schematic diagram of the electronic device applied to the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention; the second figure is a three-dimensional exploded schematic diagram of the electronic device applied to the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention.

As shown in the first and second figures, an electronic device 200 includes a housing 201 and a screen 202. The housing 201 further includes a bottom housing 2011 and a frame 2012. The frame 2012 is integrally connected to the bottom housing 2011, and the bottom housing 2011 and the frame 2012 further enclose an internal space S1. The screen 202 is fixed to the edge of the frame 2012 to close the internal space S1. In practice, the internal space S1 of the electronic device 200 is used to accommodate a plurality of electronic components, and these electronic components can display images through the screen 202. In addition, the electronic device 200 of the present invention is, for example, a vehicle-mounted device for a bicycle or a motorcycle.

Please continue to refer to Figures 3 to 6. Figure 3 is an enlarged schematic diagram of circle A in Figure 2; Figure 4 is a three-dimensional schematic diagram showing another viewing angle of the electronic device used in the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention; Figure 5 is a three-dimensional schematic diagram of the B-B section of Figure 4; and Figure 6 is an enlarged schematic diagram of frame C in Figure 5.

As shown in the first to sixth figures, a porous waterproof pressure relief valve 100 includes a pressure relief valve body 1, an annular protrusion 2 and a waterproof breathable membrane 3.

The pressure relief valve body 1 is integrally connected to the bottom shell 2011 of the housing 201, and the pressure relief valve body 1 has an inner surface 11 and an outer surface 12 arranged opposite to each other, the inner surface 11 faces the inner space S1, and the outer surface 12 faces away from the inner space S1; wherein, the pressure relief valve body 1 is further provided with a plurality of vent holes 13 (only one is marked in the figure) penetrating from the outer surface 12 to the inner surface 11. In this embodiment, each vent hole 13 is an arc-shaped through hole.

The annular protrusion 2 is integrally formed from the inner side surface 11 and protrudes toward the inner space S1 along a first direction D1, and a groove S2 is formed along a second direction D2 opposite to the first direction D1, and the vent hole 13 is connected to the outer edge of the groove S2. The annular protrusion 2 further has an end protrusion 21 protruding along the first direction D1, and the end protrusion 21 is formed at the end of the annular protrusion 2 to form an inner concave space S3 connected to the groove S2.

In addition, an annular connecting channel S4 is further formed on the inner wall of the annular protrusion 2. The annular connecting channel S4 connects the groove S2 and the three vents 13, so that the three vents 13 can be connected to the groove S2 through the annular connecting channel S4.

The waterproof breathable membrane 3 is fixed in the concave space S3 and is used to close the groove S2; wherein the waterproof breathable membrane 3 is, for example, PTFE (Teflon), which can block the flow of liquids such as water and allow gas to pass through.

Please continue to refer to Figures 7 and 8. Figure 7 is a schematic diagram of the B-B section of Figure 4; Figure 8 is an enlarged schematic diagram of circle D in Figure 7.

As shown in FIG. 7 and FIG. 8 , the groove S2 further has a central axis X parallel to the first direction D1, and the air holes 13 are arranged around the central axis X. In this embodiment, three air holes 13 are arranged around the central axis X, so only one of the air holes 13 is visible in the cross-sectional view. The groove S2 further has a radius length d1 extending from the central axis X to the inner wall of the groove S2, and each air hole 13 has a hole edge length d2 extending from the central axis X to the outer edge of each air hole 13, and the hole edge length d2 is greater than the radius length d1.

As mentioned above, since the air holes 13 are distributed around the central axis X, and the hole edge length d2 is greater than the radius length d1, as long as the screen 202 faces upward, no matter what the actual placement angle of the electronic device 200 is, the hole edge length d2 of the lower of the three air holes 13 will be relatively lower than the groove S2, so that water entering the groove S2 can flow out through the air holes 13.

In addition, the above-mentioned hole edge length d2 can be further divided into an infinite number of hole edge lengths d2 in the first direction D1, wherein the hole edge length d2 adjacent to the outer side surface 12 is an outer length, and the hole edge length d2 far from the outer side surface 12 is an inner length. In this embodiment, any outer length is equal to any inner length, but in other embodiments, any outer length can be greater than or equal to any inner length. At any inner length relatively far from the outer side surface 12, that is, when the electronic device 200 is placed horizontally so that the central axis X is perpendicular to the direction of gravity, because any outer length of the hole edge length d2 is greater than any inner length relatively far from the outer side surface 12, the outer edge of the air vent 13 relatively located below will extend downward, thereby allowing water entering the groove S2 to flow out more easily.

In practical application, since the waterproof breathable membrane 3 has waterproof and breathable functions, it can prevent water from entering the internal space S1 through the groove S2. When the internal air pressure of a gas in the internal space S1 is greater than the external air pressure outside the shell 201, part of the gas is discharged from the internal space S1 through the waterproof breathable membrane 3, the groove S2 and the air hole 13 in sequence to the outside of the shell 201, thereby reducing the internal air pressure. In this way, even if rainwater enters the internal space S1 of the shell 201 through the gap and forms water vapor due to natural evaporation or thermal evaporation, it can also be discharged from the shell 201 through the waterproof breathable membrane 3.

In summary, compared to the waterproof pressure relief valve of the prior art that uses a water-blocking structure to block water, which easily allows water to accumulate between the water-blocking structure and the waterproof breathable membrane, thereby preventing the water flow from being discharged smoothly, the porous waterproof pressure relief valve of the present invention mainly connects the air holes to the edge of the groove to form a two-stage space structure, which effectively prevents the water flow from directly impacting the waterproof breathable membrane used to seal the groove, and because the multiple air holes of the present invention are connected to the outer edge of the groove, the water flow can be discharged more smoothly compared to the air holes located below the groove. Among them, since the multiple ventilation holes of the present invention are distributed around the central axis, no matter whether the electronic device is upright or horizontal, there will be at least one ventilation hole located relatively low, which is conducive to the discharge of water.

In addition, since any outer length of the hole edge length of the air vent of the present invention is greater than any inner length relatively far from the outer side, water can be discharged more easily, and the placement angle of the electronic device that can drain water can also be increased.

The above detailed description of the preferred specific embodiments is intended to more clearly describe the features and spirit of the present invention, but is not intended to limit the scope of the present invention by the preferred specific embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent application for the present invention.

100: Multi-hole waterproof pressure relief valve 1: Pressure relief valve body 11: Inner surface 12: Outer surface 13: Ventilation hole 2: Annular protrusion 21: End protrusion 3: Waterproof breathable membrane 200: Electronic device 201: Housing 202: Screen 2011: Bottom housing 2012: Frame S1: Internal space S2: Groove S3: Concave space S4: Annular connecting channel D1: First direction D2: Second direction X: Center axis d1: Radius length d2: Hole edge length

The first figure is a three-dimensional schematic diagram showing an electronic device applied to the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention; The second figure is a three-dimensional exploded schematic diagram showing an electronic device applied to the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention; The third figure is an enlarged schematic diagram of circle A in the second figure; The fourth figure is a three-dimensional schematic diagram showing another viewing angle of the electronic device applied to the porous waterproof pressure relief valve provided by the preferred embodiment of the present invention; The fifth figure is a three-dimensional schematic diagram of the B-B section of the fourth figure; The sixth figure is an enlarged schematic diagram of frame C in the fifth figure; The seventh figure is a B-B section schematic diagram of the fourth figure; and The eighth figure is an enlarged schematic diagram of circle D in the seventh figure.

100:Porous waterproof pressure relief valve

1: Pressure relief valve body

11: Inner side

12: Outer side

13: Ventilation holes

2: Ring-shaped protrusion

21: End convex ring

3: Waterproof and breathable membrane

2011: bottom shell

S1: Inner space

S2: Groove

S3: Concave space

S4: Ring connecting channel

D1: First direction

D2: Second direction

Claims (8)

A porous waterproof pressure relief valve is applied to an electronic device. The porous waterproof pressure relief valve comprises: A pressure relief valve body is integrally connected to a shell of the electronic device, the shell encloses an internal space, the pressure relief valve body has an inner side surface and an outer side surface facing and facing away from the internal space respectively, and the pressure relief valve body is also provided with a plurality of vents penetrating from the outer side surface to the inner side surface; An annular protrusion protrudes from the inner side surface toward the internal space along a first direction, and a groove is provided along a second direction opposite to the first direction, and the vent is connected to the outer edge of the groove; and A waterproof breathable membrane is disposed on the annular protrusion and is used to seal the groove; When an internal air pressure of a gas in the internal space is greater than an external air pressure outside the shell, part of the gas is discharged from the internal space through the waterproof breathable membrane, the groove and the vents in sequence to the outside of the shell to reduce the internal air pressure. As described in claim 1, the porous waterproof pressure relief valve, wherein the groove further has a central axis parallel to the first direction, and the air holes are distributed around the central axis. A porous waterproof pressure relief valve as described in claim 2, wherein the groove has a radius length extending from the central axis to the inner wall of the groove, each of the air holes has a hole edge length extending from the central axis to the outer edge of each of the air holes, and the hole edge length is greater than the radius length. A porous waterproof pressure relief valve as described in claim 3, wherein the hole edge length further includes at least one outer length and at least one inner length, the at least one outer length is adjacent to the outer surface, the at least one inner length is farther from the outer surface than the at least one outer length, and the at least one outer length is greater than or equal to the at least one inner length. As described in claim 1, the porous waterproof pressure relief valve, wherein the inner wall of the annular boss is further provided with an annular connecting channel, and the annular connecting channel is respectively connected to the groove and the air holes. As described in claim 1, the porous waterproof pressure relief valve, wherein the annular protrusion is integrally formed from the inner side surface and protrudes toward the internal space along the first direction. As described in claim 1, the porous waterproof pressure relief valve, wherein the annular boss further has an end convex ring protruding along the first direction, the end convex ring is formed at the end of the annular boss to form a concave space connected to the groove, and the waterproof breathable membrane is fixed in the concave space. A porous waterproof pressure relief valve as described in claim 1, wherein each of the air vents is an arc-shaped through hole.

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