US20200178412A1 - Water ingress prevention in electronic components - Google Patents
Water ingress prevention in electronic components Download PDFInfo
- Publication number
- US20200178412A1 US20200178412A1 US16/205,477 US201816205477A US2020178412A1 US 20200178412 A1 US20200178412 A1 US 20200178412A1 US 201816205477 A US201816205477 A US 201816205477A US 2020178412 A1 US2020178412 A1 US 2020178412A1
- Authority
- US
- United States
- Prior art keywords
- electronics enclosure
- channel
- chassis cover
- upper chassis
- periphery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 21
- 230000002265 prevention Effects 0.000 title description 2
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 238000007373 indentation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
- H05K5/0214—Venting apertures; Constructional details thereof with means preventing penetration of rain water or dust
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1424—Card cages
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
Definitions
- the present disclosure relates to methods and devices for preventing or minimizing water ingress in electronic components, particularly card cages or similarly sized and configured components.
- IP Ingress Protection
- dripping within the context of electronic apparatus may be caused by condensation or melting from a temperature chamber or the dripping of saline or other solution from a materials, biomedical or similar testing device.
- the problem When applied to larger electronics in commercial applications, the problem is typically addressed by housing the components in a weather-tight box. Whether customized for a given application or using one of many available products in the marketplace, the solution typically includes a plastic or metal box where the cover may or may not have a gasket and locations along the box where holes may be cut or punched out to allow for connections to the outside.
- the solution typically includes a plastic or metal box where the cover may or may not have a gasket and locations along the box where holes may be cut or punched out to allow for connections to the outside.
- the disclosed embodiment works around the need for an expensive and large solution or requiring the machine to provide water ingress protection through sealing embodiments. It has been found that attempting to seal against water ingress at the machine level results in considerable complexity and cost increases.
- the disclosed embodiment of the method and apparatus includes providing formed features built into the electronics enclosure's sheet metal chassis such that it redirects water away from the sensitive electronics.
- the chassis cover has, along its perimeter, gutters, raised lips and designated openings to control where water may run off so as to avoid various elements of electronics enclosure which may be susceptible to water.
- FIG. 1 is a perspective view of an embodiment of the present disclosure, such as may be used in a materials testing application, but is not limited thereto.
- FIG. 2 is a cross-sectional view along plane 2 - 2 of FIG. 1 , illustrating the gutter of the present disclosure.
- FIG. 3 is a cross-sectional view along plane 3 - 3 of FIG. 1 , illustrating the raised lip.
- FIG. 4 is a top plan view of an embodiment of the chassis cover of the present disclosure.
- FIG. 5 is a first edge view of an embodiment of the chassis cover of the present disclosure.
- FIG. 6 is a second edge view of an embodiment of the chassis cover of the present disclosure.
- FIG. 7 is a third edge view of an embodiment of the chassis cover of the present disclosure.
- FIG. 8 is a perspective view of an embodiment of the chassis cover of the present disclosure.
- FIG. 1 is an embodiment of the electronics enclosure 10 (such as, but not limited to, a card cage, and further particularly adaptable to a materials testing device) of the present disclosure, illustrating how water or other liquid dripping, pouring or impinging over the electronics enclosure 10 at location 100 on chassis cover 12 is diverted away from apertures, opening or entries into the electronics enclosure 10 .
- the electronics enclosure 10 such as, but not limited to, a card cage, and further particularly adaptable to a materials testing device
- FIG. 1 illustrates the electronics enclosure 10 , which is typically made of sheet metal, being subjected to water or other liquid flowing dripping, pouring, or impinging from a source above the enclosure 10 , which may be in excess of the volume of water the electronics enclosure 10 expect to see in any ordinary operation or course of events, such as, but not limited to, materials testing applications.
- the chassis cover 12 is square or rectangular in shape with four sides or edges and further includes gutters 14 and 15 , configured as first channels which may include troughs, raised portions, depressed portions, contours or indentations (see FIG.
- Raised lips 16 , 17 can likewise be configured as second channels which may include troughs, raised portions, depressed portions, contours or indentations.
- Gutters 14 , 15 and raised lips 16 , 17 form the periphery of the chassis cover 12 . This combination of gutters 14 , 15 , raised lips 16 , 17 and the positioning of the exit ports incorporated into tabs 18 , 18 ′, 20 , 20 ′ results in directing the water away from the air intake 30 and the electronic terminal 32 , the backplane 34 and similar openings and elements.
- some embodiments may include a first channel configuration around a portion or the entirety of the periphery of the chassis cover 12 .
- FIG. 1 shows that the water ingress prevention strategy works well, holding a large amount of water and properly redirecting it where desired.
- FIGS. 4-8 illustrate various view of the chassis cover 12 , including further detail of the gutters 14 , 15 , raised lips 16 , 17 and tabs 18 , 18 ′, 20 , 20 ′.
- Tab 18 , 20 is illustrated directly opposing tabs 18 ′, 20 ′ on opposite sides of the chassis cover.
- raised lip 16 is formed at a 165 degree angle with the chassis cover 12 while raised lip 17 is formed at a 135 degree angle, in order to direct impinging liquid away from the raised lips 16 , 17 and toward the gutters 14 , 15 .
- Those skilled in the art will recognize that these values are representative and may vary in different embodiments.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The present disclosure relates to methods and devices for preventing or minimizing water ingress in electronic components, particularly card cages or similarly sized and configured components, which may be used in many applications including, but not limited to, materials testing. A gutter is formed around a first portion of the perimeter of a chassis cover and a second channel is formed around a second portion of the perimeter of the chassis cover. This configuration is arranged and constructed to direct the impinging water or liquid away from such components as the air intake, the backplane, openings and exposed electronic terminals
Description
- The present disclosure relates to methods and devices for preventing or minimizing water ingress in electronic components, particularly card cages or similarly sized and configured components.
- The concept of protecting electronics against water or debris ingress is well understood and applied. Many products, notably smart phone manufacturers recently, readily advertise the Ingress Protection (IP) rating of their devices to market the robustness of their products against contact with, or in some cases submersion in, water.
- Moreover, dripping within the context of electronic apparatus may be caused by condensation or melting from a temperature chamber or the dripping of saline or other solution from a materials, biomedical or similar testing device.
- When applied to larger electronics in commercial applications, the problem is typically addressed by housing the components in a weather-tight box. Whether customized for a given application or using one of many available products in the marketplace, the solution typically includes a plastic or metal box where the cover may or may not have a gasket and locations along the box where holes may be cut or punched out to allow for connections to the outside. These solutions work quite well for placing a series of related electric or electronic components, including individually-mounted printed circuit boards.
- No solution was found that offers water ingress mitigation for a card cage that houses multiple boards that blind-mate to a midplane or backplane board. Typically, such card cages are inside another structure that guarantees protection from water ingress at the higher level (parent) structure.
- It is therefore an object of the present disclosure to provide improvements to minimize or eliminate water leakage into electronic components, particularly a card cage, or electronic components that are similarly sized and configured.
- The disclosed embodiment works around the need for an expensive and large solution or requiring the machine to provide water ingress protection through sealing embodiments. It has been found that attempting to seal against water ingress at the machine level results in considerable complexity and cost increases.
- The disclosed embodiment of the method and apparatus includes providing formed features built into the electronics enclosure's sheet metal chassis such that it redirects water away from the sensitive electronics. In effect, the chassis cover has, along its perimeter, gutters, raised lips and designated openings to control where water may run off so as to avoid various elements of electronics enclosure which may be susceptible to water.
- Further objects and advantages of the disclosure will become apparent from the following description and from the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of an embodiment of the present disclosure, such as may be used in a materials testing application, but is not limited thereto. -
FIG. 2 is a cross-sectional view along plane 2-2 ofFIG. 1 , illustrating the gutter of the present disclosure. -
FIG. 3 is a cross-sectional view along plane 3-3 ofFIG. 1 , illustrating the raised lip. -
FIG. 4 is a top plan view of an embodiment of the chassis cover of the present disclosure. -
FIG. 5 is a first edge view of an embodiment of the chassis cover of the present disclosure. -
FIG. 6 is a second edge view of an embodiment of the chassis cover of the present disclosure. -
FIG. 7 is a third edge view of an embodiment of the chassis cover of the present disclosure. -
FIG. 8 is a perspective view of an embodiment of the chassis cover of the present disclosure. - Referring now to the drawings in detail, one sees that
FIG. 1 is an embodiment of the electronics enclosure 10 (such as, but not limited to, a card cage, and further particularly adaptable to a materials testing device) of the present disclosure, illustrating how water or other liquid dripping, pouring or impinging over theelectronics enclosure 10 atlocation 100 onchassis cover 12 is diverted away from apertures, opening or entries into theelectronics enclosure 10. -
FIG. 1 illustrates theelectronics enclosure 10, which is typically made of sheet metal, being subjected to water or other liquid flowing dripping, pouring, or impinging from a source above theenclosure 10, which may be in excess of the volume of water theelectronics enclosure 10 expect to see in any ordinary operation or course of events, such as, but not limited to, materials testing applications. Thechassis cover 12 is square or rectangular in shape with four sides or edges and further includesgutters FIG. 2 for a cross-sectional view of a typical gutter 14), around a first pair of opposed sides of the four sides of thechassis cover 12, directing water (or other liquid) to an exit port or predetermined spot incorporated into downwardly extendingtabs 18 and 20 (secured byrespective bolts gutter 14, and downwardly extendingtabs 18′ and 20′ (shown inFIGS. 4-9 and secured to side walls by bolts similar tobolts 19, 20) ongutter 15. Additionally, raisedlips 16, 17 (seeFIG. 3 for a cross-sectional view of raised lip 17) are presented on a second pair of opposed sides of thechassis cover 12. Raisedlips Gutters lips chassis cover 12. This combination ofgutters lips tabs air intake 30 and theelectronic terminal 32, thebackplane 34 and similar openings and elements. - It is envisioned that some embodiments may include a first channel configuration around a portion or the entirety of the periphery of the
chassis cover 12. -
FIG. 1 shows that the water ingress prevention strategy works well, holding a large amount of water and properly redirecting it where desired. -
FIGS. 4-8 illustrate various view of thechassis cover 12, including further detail of thegutters lips tabs Tab opposing tabs 18′, 20′ on opposite sides of the chassis cover. Further, it is noted that in the illustrated embodiment ofFIG. 7 , raisedlip 16 is formed at a 165 degree angle with thechassis cover 12 while raisedlip 17 is formed at a 135 degree angle, in order to direct impinging liquid away from the raisedlips gutters - Thus the several aforementioned objects and advantages are most effectively attained. Although preferred embodiments of the invention have been disclosed and described in detail herein, it should be understood that this invention is in no sense limited thereby.
Claims (20)
1. An electronics enclosure including an upper chassis cover, wherein the upper chassis cover includes a first channel around at least a first portion of the periphery thereof, the first channel arranged and constructed to direct liquid impinging from above the electronic enclosure to at least one pre-determined location of the periphery to flow downwardly therefrom along an exterior of the electronics enclosure thereby avoiding or minimizing entry of liquid into an interior of the electronics enclosure.
2. The electronics enclosure of claim 1 wherein the first channel is chosen from the group consisting of a gutter, a trough, a raised portion, a depressed portion, a contour and an indentation.
3. The electronics enclosure of claim 1 wherein the upper chassis cover includes a second channel around at least a second portion of the periphery thereof, the second channel arranged and constructed to direct impinging liquid to the first channel.
4. The electronics enclosure of claim 3 wherein the second channel is chosen from the group consisting of a raised lip, a trough, a raised portion, a depressed portion, a contour and an indentation.
5. The electronics enclosure of claim 3 wherein the upper chassis cover includes four sides, comprising a first pair of opposed sides and a second pair of opposed sides.
6. The electronics enclosure of claim 5 wherein the first pair of opposed sides comprises the first portion of the periphery, including the first channel.
7. The electronics enclosure of claim 6 wherein the second pair of opposed sides comprises the second portion of the periphery, including the second channel.
8. The electronics enclosure of claim 7 wherein each of the first pair of opposed sides includes at least one pre-determined location to direct impinging liquid to flow downwardly therefrom.
9. The electronics enclosure of claim 7 wherein each of the first pair of opposed sides includes at least two pre-determined locations to direct impinging liquid to flow downwardly therefrom.
10. The electronics enclosure of claim 7 including at least one element selected from the group consisting of a backplane, an air intake, an opening, and an electronic terminal, wherein the pre-determined location of the periphery is chosen to direct impinging liquid away from the at least one element.
11. The electronics enclosure of claim 1 wherein the predetermined location is incorporated into at least one tab in the upper chassis cover, the at least one tab being secured to a side wall of the electronics enclosure.
12. An upper chassis cover for an electronics enclosure, the upper chassis cover including a first channel around at least a first portion of the periphery thereof, the first channel arranged and constructed to direct liquid impinging from above the electronics enclosure to at least one pre-determined location of the periphery to flow downwardly therefrom along an exterior of the electronics enclosure thereby avoiding or minimizing entry of liquid into an interior of the electronics enclosure.
13. The upper chassis cover of claim 12 wherein the first channel is chosen from the group consisting of a gutter, a trough, a raised portion, a depressed portion, a contour and an indentation.
14. The upper chassis cover of claim 12 further including a second channel around at least a second portion of the periphery thereof, the second channel arranged and constructed to direct impinging liquid to the first channel.
15. The upper chassis cover of claim 14 wherein the second channel is chosen from the group consisting of a raised lip, a trough, a raised portion, a depressed portion, a contour and an indentation.
16. The upper chassis cover of claim 15 further including four sides, comprising a first pair of opposed sides and a second pair of opposed sides.
17. The upper chassis cover of claim 16 wherein the first pair of opposed sides comprises the first portion of the periphery, including the first channel.
18. The upper chassis cover of claim 17 wherein the second pair of opposed sides comprises the second portion of the periphery, including the second channel.
19. The upper chassis cover of claim 18 wherein each of the first pair of opposed sides includes at least one pre-determined location to direct impinging liquid to flow downwardly therefrom.
20. A materials testing device including an electronics enclosure which further includes an upper chassis cover, wherein the upper chassis cover includes a first channel around at least a first portion of the periphery thereof, the first channel arranged and constructed to direct liquid impinging from above the electronics enclosure to at least one pre-determined location of the periphery to flow downwardly therefrom along an exterior of the electronics enclosure thereby avoiding or minimizing entry of liquid into an interior of the electronics enclosure.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/205,477 US10653030B1 (en) | 2018-11-30 | 2018-11-30 | Water ingress prevention in electronic components |
EP19783916.0A EP3888429A1 (en) | 2018-11-30 | 2019-09-26 | Water ingress prevention in electronic components |
CN201980077216.9A CN113455113B (en) | 2018-11-30 | 2019-09-26 | Device and method for preventing water ingress in electronic components |
PCT/US2019/053058 WO2020112226A1 (en) | 2018-11-30 | 2019-09-26 | Water ingress prevention in electronic components |
JP2021531069A JP7466542B2 (en) | 2018-11-30 | 2019-09-26 | Preventing water ingress into electronic components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/205,477 US10653030B1 (en) | 2018-11-30 | 2018-11-30 | Water ingress prevention in electronic components |
Publications (2)
Publication Number | Publication Date |
---|---|
US10653030B1 US10653030B1 (en) | 2020-05-12 |
US20200178412A1 true US20200178412A1 (en) | 2020-06-04 |
Family
ID=68165856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/205,477 Active US10653030B1 (en) | 2018-11-30 | 2018-11-30 | Water ingress prevention in electronic components |
Country Status (5)
Country | Link |
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US (1) | US10653030B1 (en) |
EP (1) | EP3888429A1 (en) |
JP (1) | JP7466542B2 (en) |
CN (1) | CN113455113B (en) |
WO (1) | WO2020112226A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7041085B2 (en) * | 2019-02-05 | 2022-03-23 | ファナック株式会社 | Electronic device |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6462270B1 (en) * | 2001-04-18 | 2002-10-08 | Sumitomo Electric Wiring Systems, Inc. | Two-piece junction box cover having gutters for reducing water infiltration |
JP2002325212A (en) | 2001-04-25 | 2002-11-08 | Matsushita Electric Ind Co Ltd | Casing of electric equipment |
JP3893145B2 (en) * | 2001-07-26 | 2007-03-14 | トヨタ車体株式会社 | Junction block water-proof cover |
US6774309B2 (en) * | 2002-06-14 | 2004-08-10 | Sumitomo Wiring Systems, Ltd. | Drainage construction of a waterproof cover of an electrical connection box |
US7786391B1 (en) * | 2006-07-05 | 2010-08-31 | Universal Lighting Technologies, Inc. | Ballast housing having rolled edge lead wire exit |
JP4191794B2 (en) * | 2006-07-25 | 2008-12-03 | パナソニック株式会社 | Portable electronic devices |
JP4901374B2 (en) * | 2006-08-31 | 2012-03-21 | 矢崎総業株式会社 | Drainage structure of electrical junction box |
US7586038B2 (en) * | 2006-12-21 | 2009-09-08 | Yazaki Corporation | Electrical junction box and assembling method thereof |
US8315040B2 (en) * | 2007-10-16 | 2012-11-20 | Traxxas Lp | Protective enclosure for model vehicle |
JP4425961B2 (en) * | 2008-01-15 | 2010-03-03 | パナソニック株式会社 | Circuit board module and electronic device |
GB2462842A (en) | 2008-08-22 | 2010-02-24 | Siemens Ag | A human machine interface panel for electronic equipment |
JP2011063124A (en) | 2009-09-17 | 2011-03-31 | Denso Corp | Electric control equipment |
JP5612987B2 (en) * | 2010-09-29 | 2014-10-22 | 矢崎総業株式会社 | Electrical junction box |
JP5791000B2 (en) | 2011-09-26 | 2015-10-07 | 住友電装株式会社 | Electrical junction box |
JP5546689B2 (en) | 2011-09-28 | 2014-07-09 | 三菱電機株式会社 | Electronics |
US8619417B1 (en) * | 2011-11-08 | 2013-12-31 | The United States Of America As Represented By The Secretary Of The Navy | Water-resistant computer docking station |
JP5851849B2 (en) * | 2012-01-13 | 2016-02-03 | 矢崎総業株式会社 | Electrical junction box |
JP5861683B2 (en) * | 2013-09-18 | 2016-02-16 | 株式会社デンソー | Vehicle electronic control unit |
US20150138785A1 (en) * | 2013-11-15 | 2015-05-21 | Osram Sylvania Inc. | Enclosure with grommetless strain relief |
US20160014910A1 (en) * | 2014-07-10 | 2016-01-14 | Peerless Industries, Inc. | Enclosed media device with improved heat transfer capabilities |
JP6594717B2 (en) * | 2015-09-17 | 2019-10-23 | 株式会社デンソーテン | Waterproof structure |
US9868408B2 (en) * | 2016-01-29 | 2018-01-16 | Ford Global Technologies, Llc | Protective cover for vehicular control module |
-
2018
- 2018-11-30 US US16/205,477 patent/US10653030B1/en active Active
-
2019
- 2019-09-26 WO PCT/US2019/053058 patent/WO2020112226A1/en unknown
- 2019-09-26 JP JP2021531069A patent/JP7466542B2/en active Active
- 2019-09-26 EP EP19783916.0A patent/EP3888429A1/en active Pending
- 2019-09-26 CN CN201980077216.9A patent/CN113455113B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN113455113B (en) | 2023-04-07 |
US10653030B1 (en) | 2020-05-12 |
WO2020112226A1 (en) | 2020-06-04 |
EP3888429A1 (en) | 2021-10-06 |
JP7466542B2 (en) | 2024-04-12 |
CN113455113A (en) | 2021-09-28 |
JP2022509674A (en) | 2022-01-21 |
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