US20030226676A1 - Dynamically moveable exhausting emc sealing system - Google Patents
Dynamically moveable exhausting emc sealing system Download PDFInfo
- Publication number
- US20030226676A1 US20030226676A1 US10/161,930 US16193002A US2003226676A1 US 20030226676 A1 US20030226676 A1 US 20030226676A1 US 16193002 A US16193002 A US 16193002A US 2003226676 A1 US2003226676 A1 US 2003226676A1
- Authority
- US
- United States
- Prior art keywords
- housing
- bezel
- emc
- printed circuit
- docking apparatus
- 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
- 238000007789 sealing Methods 0.000 title description 7
- 238000003032 molecular docking Methods 0.000 claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 2
- 239000007769 metal material Substances 0.000 claims 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 description 14
- 230000007246 mechanism Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000013022 venting Methods 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
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0015—Gaskets or seals
Definitions
- the present invention is generally directed to pluggable cartridges for inserting printed circuit cards into and for removing them from printed circuit boards. More particularly, the present invention is directed to a removable exhausting EMC sealing system incorporated with the cartridge which provides a level of EMC shielding and thermal protection.
- packaging designs should be fully compatible with those aspects of system design associated with cooling functions. Also, to whatever extent possible, packaging designs should be: economical to produce; function smoothly; require little or no maintenance; be producible from inexpensive, readily available materials; and be reliably operable over a large number of insertion and removal operation cycles.
- EMC electromagnetic compatibility
- the present discussion refers to printed circuit boards and printed circuit cards.
- the printed circuit board is the larger component into which at least one printed circuit card is inserted for purposes of electrical connection.
- the present disclosure places no specific limits on either the size of a printed circuit board or the size of a printed circuit card.
- a circuit board will be populated with a plurality of printed circuit cards. That is, the printed board will have a number of printed circuit cards inserted therein. Accordingly, as used herein, the terms “printed circuit board” and “printed circuit card” are considered to be relative terms.
- the present inventors are presented with the following sometimes competing packaging problems: dense and close packaging, cooling, electromagnetic interference shielding, hot pluggability, the desire to provide an easy-to-load cartridge for carrying printed circuit cards, the removal of fully populated printed circuit boards and the insertion thereof, and means to provide a removable cooperative EMI shielding arrangement in a system which also provides circuit board thermal protection.
- a docking apparatus for printed circuit boards including a cassette housing, having a housing base, a housing cover and a housing wall, wherein the housing base and the housing wall are disposed relative to each other so as to define a housing cavity for containing a printed circuit card and wherein the housing wall includes a cable opening disposed so as to be communicated with the housing cavity, a housing bezel, disposed relative to the cassette housing so as to be associated with the cable opening, the housing bezel includes an outer bezel having a first plurality of openings and an inner bezel having a second plurality of apertures, the inner bezel in electrical communication with the printed circuit card, wherein said housing bezel is removable, and an EMC gasket disposed between the outer and inner bezels of said housing bezel, the EMC gasket configured to provide a removable EMC seal proximate the cable opening while still allowing airflow through the first and second plurality of apertures having the EMC gasket therebetween.
- FIG. 1 is an exploded overall view of a docking cassette and a computer system in accordance with an embodiment of the invention.
- FIG. 2 is a perspective view of a docking cassette in accordance with an embodiment of the invention.
- FIG. 3 is an exploded view of a docking cassette in accordance with an embodiment of the invention.
- FIG. 4 is a perspective view of an exemplary housing bezel disposed on the docking cassette of FIG. 3;
- FIG. 5 is a top view of the exemplary housing bezel of FIG. 4 attached to a printed circuit card.
- FIG. 6 is a perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card with an outer tail-stock bezel removed;
- FIG. 7 is an exploded perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card;
- FIG. 8 is a perspective view of a perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card;
- FIG. 9 is a partial cross section view of the exemplary housing bezel of FIGS. 5 and 8 taken along lines 9 - 9 ;
- FIG. 10 is a top view of an exemplary EMC sealing gasket used with the exemplary housing bezel in the FIGURES;
- FIG. 11 is a partial perspective view of the exemplary EMC sealing gasket used with the exemplary housing bezel in the FIGURES.
- FIG. 12 is a partial enlarged top perspective view of the exemplary housing bezel of FIG. 4 illustrating cooperation between vents in the outer tail-stock bezel and the exemplary EMC sealing gasket.
- FIG. 1 a docking apparatus or cassette 10 for mounting a printed circuit card (PCC) into a computer system 12 is shown, in accordance with an embodiment of the invention.
- Docking apparatus 10 preferably provides structural support to the PCC so as to allow for the easy insertion and removal of the PCC from computer system 12 , as well as thermal and electrical isolation from other PCC's and components within the computer system.
- Docking cassette 10 is disposed onto a computer system main board 14 or main printed circuit board (PCB) having a PCB connector receptacle 16 , a first receptacle 18 and a second receptacle 20 .
- Docking cassette 10 is preferably disposed onto computer system main board 14 such that a PCB connector is adjacent to PCB connector receptacle 16 .
- main board 14 is slidably engaged with a cable tray 22 for releasably supporting and securing computer system 12 in a system rack (not shown).
- FIGS. 2 and 3 docking apparatus 10 for mounting to a printed circuit board (PCB) in computer system 12 is shown, in accordance with an embodiment of the invention.
- Docking apparatus 10 preferably includes a cassette housing 24 , a linkage mechanism 26 and a housing bezel 30 .
- Cassette housing 24 preferably includes a housing base 32 , a housing cover 34 and a housing wall 36 , wherein housing base 32 and housing wall 36 are non-movably associated with each other and disposed relative to each other so as to define a housing cavity 38 for movably containing a PCC 40 .
- housing base 32 preferably includes a linkage cavity 42 and four mounting devices 44 for movably holding PCC 40 .
- PCC 40 preferably includes a PCC mounting mechanism 46 and mounting device 44 preferably includes a device opening 48 for slidingly containing PCC mounting mechanism 46 , wherein PCC mounting mechanism 46 may be a screw, a pin or any mounting mechanism suitable to the desired end purpose.
- housing base 32 preferably includes a linkage mounting receptacle 50 for associating linkage mechanism 26 with housing base 32 .
- linkage mounting receptacle 50 is preferably a receptacle opening for receiving a linkage mounting screw 52
- linkage mounting receptacle 50 may be any receptacle device suitable to the desired end purpose, such as a clip receptacle.
- PCC 40 may be movably associated with housing base 32 using any device or method suitable to the desired end purpose, such as a screw or pin.
- Housing wall 36 preferably includes a cable opening 54 , a PCB connector opening 56 and a plurality of vent openings 58 .
- housing wall 36 preferably includes a first protrusion 60 and a second protrusion 62 , wherein first protrusion 60 and second protrusion 62 are disposed so as to lockingly engage with main board 14 of computer system 12 .
- first protrusion 60 and second protrusion 62 are shown as being disposed on housing wall 36 . However, it is considered within the scope of the invention that first protrusion 60 and second protrusion 62 may be disposed anywhere on cassette housing 24 in a manner suitable to the desired end purpose.
- housing wall 36 preferably includes at least one mounting structure 64 which defines a threaded cavity 66 for receiving a mounting apparatus 68 , such as a screw.
- PCB connector opening 56 and cable opening 54 are preferably disposed so as to allow communication with the PCB connector 70 and the PCC cable connections 72 when PCC 40 is disposed within housing cavity 38 .
- Housing cover 34 preferably includes at least one cover opening 74 disposed so as to allow communication with mounting structure 64 when housing cover 34 is associated with housing wall 36 .
- Cover opening 74 is preferably disposed so as to allow mounting apparatus 68 to communicate with threaded cavity 66 for removably securing housing cover 34 with housing wall 36 .
- housing cover 34 may also be removably secured with housing base 32 and/or housing wall 36 using any mounting device or method suitable to the desired end purpose.
- housing bezel 30 preferably includes an inner tail-stock bezel 76 , an EMC gasket 80 and an outer tail-stock bezel 82 .
- Inner bezel 76 preferably includes a forward bezel wall 84 having at least one forward opening 86 (FIG. 3).
- EMC gasket 80 preferably includes a plurality of apertures 88 disposed along a length defining gasket 80 and plurality of retaining clips 90 extending from an edge of gasket 80 for attachment to a flange extending from inner bezel 76 described more fully below having apertures aligned with apertures 88 of gasket 80 for venting air therethrough.
- Outer tail-stock bezel 82 preferably includes a tail-stock front 92 having a tail-stock front opening 94 and a tail-stock wall 96 having a tail-stock top 98 , a tail-stock bottom 100 and a tail-stock side 102 .
- tail-stock front 92 and tail-stock wall 96 are preferably non-movably associated with each other so as to form a tail-stock cavity 104 .
- tail-stock bottom 100 preferably includes at least one flanged opening 106 .
- Tail-stock top 98 also preferably includes at least one tail-stock mounting hole 108 for mounting housing bezel 30 to cassette housing 24 .
- inner tail-stock bezel 76 includes a flange 110 extending from forward bezel wall 84 .
- Flange 110 includes apertures 112 disposed in a length thereof for allowing air to pass therethrough.
- Retaining clips 88 extending from an edge defining a surface of EMC gasket 80 are configured to clip onto flange 110 such that apertures 90 of gasket 80 are aligned with apertures 112 disposed along flange 110 .
- Inner bezel 76 further includes a mounting lip 114 extending from an opposite edge of wall 84 in the same direction and substantially parallel to flange 110 .
- Mounting lip 114 is configured to mount PCC 40 in an offset position within docking apparatus 10 so that a bottom surface of PCC 40 is not positioned against housing base 32 (shown in FIG. 9).
- inner bezel 76 having EMC gasket 80 coupled thereto is disposed within tail-stock cavity 104 such that apertures 90 of gasket 80 and apertures 112 of inner bezel are aligned with vents 120 configured in tail-stock wall 96 of outer tail sock bezel 82 .
- apertures 90 and 112 align with two rows of vents 120 for allowing air to flow therethrough. The two rows of vents 120 is best seen in FIG. 4.
- inner bezel 76 When PCC 40 is operably connected to mounting lip 114 and inner bezel 76 is disposed within tail-stock cavity 104 , inner bezel 76 is adjacent to tail-stock front 92 such that the tail-stock front opening 94 and forward opening 86 are also adjacent. Inner bezel 76 is disposed such that tail-stock top 98 electrically engages a top surface of flange 110 via gasket 80 . Housing bezel 30 is preferably disposed over cable opening 54 so as to enclose housing cavity 38 . In addition, housing bezel 30 is preferably disposed such that tail-stock mounting hole 108 is in communication with cover opening 74 and threaded cavity 66 . Housing cover 34 , linkage mechanism 26 and tail-stock mechanism 82 are then securely associated with housing wall 36 using mounting apparatus 68 .
- gasket 90 is configured to provide electrical continuity between PCC 40 , inner tail-stock bezel 76 and outer tail-stock bezel 82 and thus provide EMC shielding while allowing air to flow through vents 120 , apertures 90 and 120 aligned with each other.
- gasket 80 includes apertures 90 extending a length of gasket 80 .
- Each aperture 90 is configured defining a hexagon.
- Three spokes 122 extend radially inwardly and upwardly from three side edges 124 of the six sided edges 124 defining each hexagon shaped aperture 90 terminating in a center 126 to define a compressible pyramid shaped structure 130 .
- Each spoke 122 is configured having at least one bend 128 in a length thereof intermediate said edge 124 and said center 126 to increase compressibility of the pyramid structure 130 formed by the three spokes 122 .
- the pyramid structure 130 is outlined with three spokes 122 terminating to a point at center 126 which is substantially a center of the hexagon defined by aperture 90 while still allowing air to flow through aperture 90 .
- Pyramid structure 130 is compressible to provide electrical continuity between inner bezel 76 and outer bezel 82 when gasket 80 is disposed therebetween providing air flow and EMC sealing, while allowing universal fit and adaptability.
- Compressible pyramid 130 allows universal fit and adaptability because it is clipped onto inner bezel 76 via clips 88 and allows installation with different dimensioned outer bezels 82 while maintaining EMC sealing as a result of the compressible spokes 122 extending from a surface of gasket 80 to provide contact with outer bezel 82 .
- EMC gasket 80 has been described with apertures 90 defining a hexagon, a number of different configurations may optionally be employed to provide suitable airflow therethrough.
- raised spokes 122 have been described as forming a pyramid structure, more and less than three spokes 122 may be employed to form other configurations, such as, including for example, but not limited to, a hemisphere, a box frame structure, and the like.
- FIG. 12 an enlarged view of FIG. 5 is shown detailing cooperation between EMC gasket 80 providing electrical continuity between inner bezel 76 via clips 88 and outer bezel 82 via an intermediate rib 132 separating one row of vents 120 from another row of vents 120 . More specifically a bottom surface of EMC gasket 80 and clips 88 contact inner bezel 76 while center 126 contacts a bottom surface defining rib 132 of outer bezel 82 while allowing air to flow through corresponding apertures aligned with each other as shown in FIG. 12.
- spokes 122 meet at center 126 corresponding to generally to a center thereof or within aperture 90 and 110 , it is contemplated that spokes 122 may form other compressible configurations that also do not necessarily form an apex of the resulting structure disposed above apertures 90 and 110 .
- EMC gasket 80 is preferably constructed from a rigid material having sufficient strength and electromagnetic compatibility properties, such as beryllium copper and/or stainless steel. However, it is considered within the scope of the invention that gasket 80 may be constructed from any material suitable to the desired end purpose. It will also be understood that although EMC gasket has been described having a pyramid structure disposed over aperture 90 to provide electrical continuity between inner and outer bezels 76 and 82 , a different configuration and/or number of spokes 122 are contemplated and do not necessarily extend over aperture 90 or terminate above aperture 90 as described above for one exemplary embodiment.
- the EMC gasket described herein is a movable seal that allows for PCC insertion and extraction with the docking cassette that is universally adaptable for use with differently configured housing bezels, while still making suitable ground contact and allowing proper air flow therethrough.
- inner tail-stock bezel 76 and outer tail-stock bezel 82 are preferably constructed from a rigid material having sufficient strength, such as steel and/or stainless steel. However, it is considered within the scope of the invention that inner tail-stock bezel 76 and outer tail-stock bezel 82 may be constructed from any material suitable to the desired end purpose.
Abstract
Description
- [0001] This invention was made with Government support under subcontract B338307 under prime contract W-7405-ENG-48 awarded by the Department of Energy. The Government has certain rights in this invention.
- The present invention is generally directed to pluggable cartridges for inserting printed circuit cards into and for removing them from printed circuit boards. More particularly, the present invention is directed to a removable exhausting EMC sealing system incorporated with the cartridge which provides a level of EMC shielding and thermal protection.
- The past twenty-five or so years have seen the development of ever smaller electrical circuit components at the chip level. However, to take fullest advantage of achievements in electrical circuit miniaturization, one must package the resultant printed circuit cards containing these chips in an efficient manner. Clearly, the packaging of printed circuit cards in tight spaces is a direct logical extension of increasing chip level circuit densities. It should also be noted that the tight packaging of integrated circuit chips on printed circuit cards and the correspondingly dense packaging of the printed circuit cards is a design goal that is carried out for more than just the convenience of compactness. Compactness provides shorter distances between circuit components which, in turn, serves the very desirable goal of being able to operate the circuits effectively at higher frequencies, thus increasing the speed of numerous different forms of electrical systems, including but not limited to data processing systems.
- Moreover, mainly for reasons associated with long-term system operation and reliability, it is likewise very desirable to be able to easily insert and remove these printed circuit cards even when they are disposed in very tight spaces. The insertion and removal operations are also provided as an important part of a “hot-pluggability” function which is very desirable for “on the fly” repairs, replacements, maintenance and upgrades.
- With increased circuit density there has also been an additional constraint on packaging design. It should be appreciated that increased circuit density is more susceptible to damage and performance disruptions due to thermal effects. As components and circuits become smaller, their packaging becomes smaller thus allowing manufacturers and designers to more densely populate boards and systems. However, the smaller packaging means that there is less opportunity to dissipate heat generated by the component. As a result, any externally radiated heat from PCB's or components surrounding the smaller packaging is less likely to be dissipated, thus producing thermal damage and/or noise within the circuit and component with increased circuit density, there is also a concomitant increase in power density and heat dissipation. Accordingly, packaging designs should be fully compatible with those aspects of system design associated with cooling functions. Also, to whatever extent possible, packaging designs should be: economical to produce; function smoothly; require little or no maintenance; be producible from inexpensive, readily available materials; and be reliably operable over a large number of insertion and removal operation cycles.
- Yet one other concern arises in electrical systems as circuit feature size shrinks, operating frequencies increase and packaging densities grow larger, namely, the generation of electromagnetic interference (EMI). Electronic circuit packaging designs should thus also be compatible with structures and configurations that are employed to prevent the leakage of electromagnetic interference. To whatever extent possible, packaging designs should also include structures which actually contribute positively to the containment of electromagnetic interference. There is an ever increasing problem of electromagnetic interference caused by such devices. Virtually every electronic device, intentionally or not, emits some form of electromagnetic radiation. While this condition could be tolerated when few devices existed, the increasing number of electronic devices has made the problem more acute. The problem has been exacerbated by the “improvement” in semiconductor devices which allows them to operate at higher speeds, generally causing emission in the higher frequency bands where interference is more likely to occur. Successful minimization of the interference problem, sometimes referred to as “electromagnetic compatibility” or “EMC”, generally requires that emissions from a given device be reduced by shielding and other means, and shielding be employed to reduce the sensitivity of a device to fields from other devices. Since shielding helps to reduce sensitivity to external fields as well as reduce emissions from the device, it is a common approach to a solution of the problem.
- It is also noted that the present discussion refers to printed circuit boards and printed circuit cards. As contemplated herein, the printed circuit board is the larger component into which at least one printed circuit card is inserted for purposes of electrical connection. The present disclosure places no specific limits on either the size of a printed circuit board or the size of a printed circuit card. In the most general situation, a circuit board will be populated with a plurality of printed circuit cards. That is, the printed board will have a number of printed circuit cards inserted therein. Accordingly, as used herein, the terms “printed circuit board” and “printed circuit card” are considered to be relative terms.
- Accordingly, the present inventors are presented with the following sometimes competing packaging problems: dense and close packaging, cooling, electromagnetic interference shielding, hot pluggability, the desire to provide an easy-to-load cartridge for carrying printed circuit cards, the removal of fully populated printed circuit boards and the insertion thereof, and means to provide a removable cooperative EMI shielding arrangement in a system which also provides circuit board thermal protection.
- A docking apparatus for printed circuit boards including a cassette housing, having a housing base, a housing cover and a housing wall, wherein the housing base and the housing wall are disposed relative to each other so as to define a housing cavity for containing a printed circuit card and wherein the housing wall includes a cable opening disposed so as to be communicated with the housing cavity, a housing bezel, disposed relative to the cassette housing so as to be associated with the cable opening, the housing bezel includes an outer bezel having a first plurality of openings and an inner bezel having a second plurality of apertures, the inner bezel in electrical communication with the printed circuit card, wherein said housing bezel is removable, and an EMC gasket disposed between the outer and inner bezels of said housing bezel, the EMC gasket configured to provide a removable EMC seal proximate the cable opening while still allowing airflow through the first and second plurality of apertures having the EMC gasket therebetween.
- Referring now to the figures, which are exemplary embodiments, and wherein the like elements are numbered alike:
- FIG. 1 is an exploded overall view of a docking cassette and a computer system in accordance with an embodiment of the invention.
- FIG. 2 is a perspective view of a docking cassette in accordance with an embodiment of the invention;
- FIG. 3 is an exploded view of a docking cassette in accordance with an embodiment of the invention;
- FIG. 4 is a perspective view of an exemplary housing bezel disposed on the docking cassette of FIG. 3; and
- FIG. 5 is a top view of the exemplary housing bezel of FIG. 4 attached to a printed circuit card.
- FIG. 6 is a perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card with an outer tail-stock bezel removed;
- FIG. 7 is an exploded perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card;
- FIG. 8 is a perspective view of a perspective view of the exemplary housing bezel of FIG. 5 attached to the printed circuit card;
- FIG. 9 is a partial cross section view of the exemplary housing bezel of FIGS. 5 and 8 taken along lines9-9;
- FIG. 10 is a top view of an exemplary EMC sealing gasket used with the exemplary housing bezel in the FIGURES;
- FIG. 11 is a partial perspective view of the exemplary EMC sealing gasket used with the exemplary housing bezel in the FIGURES; and
- FIG. 12 is a partial enlarged top perspective view of the exemplary housing bezel of FIG. 4 illustrating cooperation between vents in the outer tail-stock bezel and the exemplary EMC sealing gasket.
- Referring generally to the FIG. 1, a docking apparatus or
cassette 10 for mounting a printed circuit card (PCC) into acomputer system 12 is shown, in accordance with an embodiment of the invention.Docking apparatus 10 preferably provides structural support to the PCC so as to allow for the easy insertion and removal of the PCC fromcomputer system 12, as well as thermal and electrical isolation from other PCC's and components within the computer system. -
Docking cassette 10 is disposed onto a computer systemmain board 14 or main printed circuit board (PCB) having aPCB connector receptacle 16, a first receptacle 18 and asecond receptacle 20.Docking cassette 10 is preferably disposed onto computer systemmain board 14 such that a PCB connector is adjacent toPCB connector receptacle 16. In addition,main board 14 is slidably engaged with acable tray 22 for releasably supporting and securingcomputer system 12 in a system rack (not shown). - Referring to FIGS. 2 and 3,
docking apparatus 10 for mounting to a printed circuit board (PCB) incomputer system 12 is shown, in accordance with an embodiment of the invention.Docking apparatus 10 preferably includes acassette housing 24, alinkage mechanism 26 and ahousing bezel 30. Cassette housing 24 preferably includes ahousing base 32, ahousing cover 34 and ahousing wall 36, whereinhousing base 32 andhousing wall 36 are non-movably associated with each other and disposed relative to each other so as to define ahousing cavity 38 for movably containing aPCC 40. - In accordance with an exemplary embodiment,
housing base 32 preferably includes alinkage cavity 42 and fourmounting devices 44 for movably holding PCC 40. PCC 40 preferably includes a PCC mounting mechanism 46 andmounting device 44 preferably includes a device opening 48 for slidingly containing PCC mounting mechanism 46, wherein PCC mounting mechanism 46 may be a screw, a pin or any mounting mechanism suitable to the desired end purpose. In addition,housing base 32 preferably includes alinkage mounting receptacle 50 for associatinglinkage mechanism 26 withhousing base 32. In accordance with an exemplary embodiment, althoughlinkage mounting receptacle 50 is preferably a receptacle opening for receiving a linkage mounting screw 52,linkage mounting receptacle 50 may be any receptacle device suitable to the desired end purpose, such as a clip receptacle. In accordance with an exemplary embodiment, it is considered within the scope of the disclosure thatPCC 40 may be movably associated withhousing base 32 using any device or method suitable to the desired end purpose, such as a screw or pin. -
Housing wall 36 preferably includes acable opening 54, aPCB connector opening 56 and a plurality ofvent openings 58. In addition,housing wall 36 preferably includes afirst protrusion 60 and asecond protrusion 62, whereinfirst protrusion 60 andsecond protrusion 62 are disposed so as to lockingly engage withmain board 14 ofcomputer system 12. In accordance with an embodiment of the invention,first protrusion 60 andsecond protrusion 62 are shown as being disposed onhousing wall 36. However, it is considered within the scope of the invention thatfirst protrusion 60 andsecond protrusion 62 may be disposed anywhere oncassette housing 24 in a manner suitable to the desired end purpose. Moreover,housing wall 36 preferably includes at least one mountingstructure 64 which defines a threadedcavity 66 for receiving a mountingapparatus 68, such as a screw. In addition,PCB connector opening 56 andcable opening 54 are preferably disposed so as to allow communication with thePCB connector 70 and thePCC cable connections 72 whenPCC 40 is disposed withinhousing cavity 38. -
Housing cover 34 preferably includes at least one cover opening 74 disposed so as to allow communication with mountingstructure 64 whenhousing cover 34 is associated withhousing wall 36. Cover opening 74 is preferably disposed so as to allow mountingapparatus 68 to communicate with threadedcavity 66 for removably securinghousing cover 34 withhousing wall 36. Although an exemplary embodiment describeshousing cover 34 being removably secured withhousing wall 36, it is considered within the scope of the disclosure thathousing cover 34 may also be removably secured withhousing base 32 and/orhousing wall 36 using any mounting device or method suitable to the desired end purpose. - Referring now to FIGS.3-5,
housing bezel 30 preferably includes an inner tail-stock bezel 76, anEMC gasket 80 and an outer tail-stock bezel 82.Inner bezel 76 preferably includes aforward bezel wall 84 having at least one forward opening 86 (FIG. 3).EMC gasket 80 preferably includes a plurality ofapertures 88 disposed along alength defining gasket 80 and plurality of retainingclips 90 extending from an edge ofgasket 80 for attachment to a flange extending frominner bezel 76 described more fully below having apertures aligned withapertures 88 ofgasket 80 for venting air therethrough. Outer tail-stock bezel 82 preferably includes a tail-stock front 92 having a tail-stock front opening 94 and a tail-stock wall 96 having a tail-stock top 98, a tail-stock bottom 100 and a tail-stock side 102. In accordance with an embodiment of the invention, tail-stock front 92 and tail-stock wall 96 are preferably non-movably associated with each other so as to form a tail-stock cavity 104. In addition, tail-stock bottom 100 preferably includes at least oneflanged opening 106. Tail-stock top 98 also preferably includes at least one tail-stock mounting hole 108 for mountinghousing bezel 30 tocassette housing 24. - Still referring now to FIGS. 3 and 5, inner tail-
stock bezel 76 includes aflange 110 extending fromforward bezel wall 84.Flange 110 includesapertures 112 disposed in a length thereof for allowing air to pass therethrough. Retaining clips 88 extending from an edge defining a surface ofEMC gasket 80 are configured to clip ontoflange 110 such thatapertures 90 ofgasket 80 are aligned withapertures 112 disposed alongflange 110.Inner bezel 76 further includes a mountinglip 114 extending from an opposite edge ofwall 84 in the same direction and substantially parallel toflange 110. Mountinglip 114 is configured to mountPCC 40 in an offset position withindocking apparatus 10 so that a bottom surface ofPCC 40 is not positioned against housing base 32 (shown in FIG. 9). - Referring now to FIGS. 3, 4,8, and 9,
inner bezel 76 havingEMC gasket 80 coupled thereto is disposed within tail-stock cavity 104 such thatapertures 90 ofgasket 80 andapertures 112 of inner bezel are aligned withvents 120 configured in tail-stock wall 96 of outertail sock bezel 82. In a preferred embodiment,apertures vents 120 for allowing air to flow therethrough. The two rows ofvents 120 is best seen in FIG. 4. - When
PCC 40 is operably connected to mountinglip 114 andinner bezel 76 is disposed within tail-stock cavity 104,inner bezel 76 is adjacent to tail-stock front 92 such that the tail-stock front opening 94 and forward opening 86 are also adjacent.Inner bezel 76 is disposed such that tail-stock top 98 electrically engages a top surface offlange 110 viagasket 80.Housing bezel 30 is preferably disposed over cable opening 54 so as to enclosehousing cavity 38. In addition,housing bezel 30 is preferably disposed such that tail-stock mounting hole 108 is in communication with cover opening 74 and threadedcavity 66.Housing cover 34,linkage mechanism 26 and tail-stock mechanism 82 are then securely associated withhousing wall 36 using mountingapparatus 68. - Referring to FIGS.9-11,
gasket 90 is configured to provide electrical continuity betweenPCC 40, inner tail-stock bezel 76 and outer tail-stock bezel 82 and thus provide EMC shielding while allowing air to flow throughvents 120,apertures gasket 80 includesapertures 90 extending a length ofgasket 80. Eachaperture 90 is configured defining a hexagon. Threespokes 122 extend radially inwardly and upwardly from threeside edges 124 of the sixsided edges 124 defining each hexagon shapedaperture 90 terminating in acenter 126 to define a compressible pyramid shapedstructure 130. Each spoke 122 is configured having at least onebend 128 in a length thereof intermediate saidedge 124 and saidcenter 126 to increase compressibility of thepyramid structure 130 formed by the threespokes 122. Thepyramid structure 130 is outlined with threespokes 122 terminating to a point atcenter 126 which is substantially a center of the hexagon defined byaperture 90 while still allowing air to flow throughaperture 90.Pyramid structure 130 is compressible to provide electrical continuity betweeninner bezel 76 andouter bezel 82 whengasket 80 is disposed therebetween providing air flow and EMC sealing, while allowing universal fit and adaptability.Compressible pyramid 130 allows universal fit and adaptability because it is clipped ontoinner bezel 76 viaclips 88 and allows installation with different dimensionedouter bezels 82 while maintaining EMC sealing as a result of thecompressible spokes 122 extending from a surface ofgasket 80 to provide contact withouter bezel 82. It will be understood that althoughEMC gasket 80 has been described withapertures 90 defining a hexagon, a number of different configurations may optionally be employed to provide suitable airflow therethrough. In addition, although raisedspokes 122 have been described as forming a pyramid structure, more and less than threespokes 122 may be employed to form other configurations, such as, including for example, but not limited to, a hemisphere, a box frame structure, and the like. - Referring to FIG. 12, an enlarged view of FIG. 5 is shown detailing cooperation between
EMC gasket 80 providing electrical continuity betweeninner bezel 76 viaclips 88 andouter bezel 82 via anintermediate rib 132 separating one row ofvents 120 from another row ofvents 120. More specifically a bottom surface ofEMC gasket 80 and clips 88 contactinner bezel 76 whilecenter 126 contacts a bottomsurface defining rib 132 ofouter bezel 82 while allowing air to flow through corresponding apertures aligned with each other as shown in FIG. 12. Again, it will be appreciated that althoughspokes 122 meet atcenter 126 corresponding to generally to a center thereof or withinaperture spokes 122 may form other compressible configurations that also do not necessarily form an apex of the resulting structure disposed aboveapertures - In accordance with an embodiment of the invention and referring to FIGS. 10 and 11,
EMC gasket 80 is preferably constructed from a rigid material having sufficient strength and electromagnetic compatibility properties, such as beryllium copper and/or stainless steel. However, it is considered within the scope of the invention that gasket 80 may be constructed from any material suitable to the desired end purpose. It will also be understood that although EMC gasket has been described having a pyramid structure disposed overaperture 90 to provide electrical continuity between inner andouter bezels spokes 122 are contemplated and do not necessarily extend overaperture 90 or terminate aboveaperture 90 as described above for one exemplary embodiment. The EMC gasket described herein is a movable seal that allows for PCC insertion and extraction with the docking cassette that is universally adaptable for use with differently configured housing bezels, while still making suitable ground contact and allowing proper air flow therethrough. - In accordance with an embodiment of the invention, inner tail-
stock bezel 76 and outer tail-stock bezel 82 are preferably constructed from a rigid material having sufficient strength, such as steel and/or stainless steel. However, it is considered within the scope of the invention that inner tail-stock bezel 76 and outer tail-stock bezel 82 may be constructed from any material suitable to the desired end purpose. - While the invention has been described with reference to an exemplary embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (22)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/161,930 US6660932B1 (en) | 2002-06-05 | 2002-06-05 | Dynamically moveable exhausting EMC sealing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/161,930 US6660932B1 (en) | 2002-06-05 | 2002-06-05 | Dynamically moveable exhausting EMC sealing system |
Publications (2)
Publication Number | Publication Date |
---|---|
US6660932B1 US6660932B1 (en) | 2003-12-09 |
US20030226676A1 true US20030226676A1 (en) | 2003-12-11 |
Family
ID=29709797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/161,930 Expired - Fee Related US6660932B1 (en) | 2002-06-05 | 2002-06-05 | Dynamically moveable exhausting EMC sealing system |
Country Status (1)
Country | Link |
---|---|
US (1) | US6660932B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110180314A1 (en) * | 2010-01-22 | 2011-07-28 | Fujitsu Network Communications, Inc. | Filler Panel with Cable Management Feature |
US20110261526A1 (en) * | 2010-04-27 | 2011-10-27 | International Business Machines Corporation | Input/output and disk expansion subsystem for an electronics rack |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6816383B2 (en) * | 2002-07-12 | 2004-11-09 | International Business Machines Corporation | Cassette housing for printed circuit cards |
US6924988B2 (en) * | 2003-07-07 | 2005-08-02 | International Business Machines Corporation | Dynamic zero clearance exhausting EMC sealing system |
US7081587B1 (en) | 2005-05-02 | 2006-07-25 | Lsi Logic Corporation | Self-sealing EMC door for removable units requiring a continuous grounding barrier |
US7357675B2 (en) * | 2006-08-08 | 2008-04-15 | International Business Machines Corporation | Universal EMC gasket |
TWI313575B (en) * | 2006-09-05 | 2009-08-11 | Compal Electronics Inc | Circuit board carrier |
US7504591B2 (en) * | 2007-01-23 | 2009-03-17 | Uber Co., Ltd. | Electromagnetic shielding gasket and electronic device provided therewith |
US7498524B2 (en) * | 2007-04-23 | 2009-03-03 | Hewlett-Packard Development Company, L.P. | Enclosure and gasket assembly for reducing EMI |
US7491900B1 (en) * | 2007-09-28 | 2009-02-17 | International Business Machines Corporation | EMC gasket filler and method |
FR2923659B1 (en) * | 2007-11-13 | 2009-12-11 | Legrand France | EASY ASSEMBLY CONNECTOR FOR MULTICONDUCTOR CABLE. |
US7683267B2 (en) * | 2007-11-29 | 2010-03-23 | International Business Machines Corporation | Collapsible EMC gasket |
US7883368B2 (en) * | 2008-11-18 | 2011-02-08 | International Business Machines Corporation | Hook end folding electromagnetic compatibilty gasket |
CN102378543A (en) * | 2010-08-06 | 2012-03-14 | 鸿富锦精密工业(深圳)有限公司 | Electronic device module |
US8964385B2 (en) * | 2012-10-05 | 2015-02-24 | Cisco Technology, Inc. | Air flow system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872212A (en) * | 1987-05-15 | 1989-10-03 | Eip Microwave, Inc. | Microwave main frame |
US4821145A (en) | 1987-11-17 | 1989-04-11 | International Business Machines Corporation | Pluggable assembly for printed circuit cards |
US4821146A (en) | 1987-11-17 | 1989-04-11 | International Business Machines Corporation | Plugable interposer and printed circuit card carrier |
JPH02272796A (en) | 1989-04-14 | 1990-11-07 | Nec Corp | Cooling structure for heat-emitting card in electronic device |
US5289347A (en) * | 1992-06-04 | 1994-02-22 | Digital Equipment Corporation | Enclosure for electronic modules |
US5504657A (en) | 1994-06-27 | 1996-04-02 | At&T Corp. | System for providing air flow control and EMR shielding of front panels of computers and similar electronic equipment |
US5943219A (en) | 1995-10-27 | 1999-08-24 | Lucent Technologies Inc. | System for providing air flow control and EMC shielding of front panels of computers and similar electronic equipment |
US6449150B1 (en) * | 2000-11-13 | 2002-09-10 | Cisco Technology, Inc. | Method and system for cooling a card shelf |
US6478170B1 (en) * | 2001-06-08 | 2002-11-12 | Terraworx, Inc. | EMC sealed joint and a faceplate for use therewith |
-
2002
- 2002-06-05 US US10/161,930 patent/US6660932B1/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110180314A1 (en) * | 2010-01-22 | 2011-07-28 | Fujitsu Network Communications, Inc. | Filler Panel with Cable Management Feature |
US8624133B2 (en) * | 2010-01-22 | 2014-01-07 | Fujitsu Limited | Filler panel with cable management feature |
US20110261526A1 (en) * | 2010-04-27 | 2011-10-27 | International Business Machines Corporation | Input/output and disk expansion subsystem for an electronics rack |
US8369092B2 (en) * | 2010-04-27 | 2013-02-05 | International Business Machines Corporation | Input/output and disk expansion subsystem for an electronics rack |
Also Published As
Publication number | Publication date |
---|---|
US6660932B1 (en) | 2003-12-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7473139B2 (en) | Universal EMC gasket | |
US6660932B1 (en) | Dynamically moveable exhausting EMC sealing system | |
US7990726B2 (en) | Tray-type structure device | |
US7692932B2 (en) | Resilient grounding clip in electronics chassis | |
US7327584B2 (en) | Electromagnetic radiation containment system | |
CA2084499C (en) | Emi shield apparatus and methods | |
US6866544B1 (en) | Methods and apparatus for mounting an electromagnetic interference shielding cage to a circuit board | |
US20070139904A1 (en) | Low-profile assemblies for providing board level EMI shielding for electrical components on opposite sides of printed circuit boards | |
US7355857B2 (en) | Heat sink gasket | |
US8164922B2 (en) | Heat management in an electronic module | |
US6195262B1 (en) | Low profile computer or communications network interconnecting device and housing therefor | |
US6414851B2 (en) | Computer system housing for attenuating electromagnetic interference (EMI) | |
US6654256B2 (en) | Electromagnetic interference shields | |
US20070081311A1 (en) | EMI shielding techniques using multiple EMI shields which share the same circuit board holes | |
JP3720732B2 (en) | Vent port and EMI waveguide for electronic devices | |
US10568206B2 (en) | Printed circuit board assembly and assembling method thereof | |
US6870746B2 (en) | Electronic module | |
US7081587B1 (en) | Self-sealing EMC door for removable units requiring a continuous grounding barrier | |
US6403879B1 (en) | Electronic chassis having an EMI gasket and integral ventilation holes | |
US6794571B1 (en) | EMC sealing system and method for an electrical enclosure | |
US6946598B1 (en) | Snap-in slot mount RFI/EMI clips | |
US6924988B2 (en) | Dynamic zero clearance exhausting EMC sealing system | |
US7525818B1 (en) | Memory card connector with EMI shielding | |
US20070291464A1 (en) | EMI shielding module | |
US7242586B2 (en) | Small form factor transceiver module with integral cage retainers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION, NEW Y Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BARRINGER, DENNIS R.;SEMINARO, EDWARD J.;TOFFLER, HAROLD M.;REEL/FRAME:012979/0199 Effective date: 20020604 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: ENERGY, U.S. DEPARTMENT OF, CALIFORNIA Free format text: CONFIRMATORY LICENSE;ASSIGNOR:INTERNATIONAL BUSNESS MACHINES CORPORATION (IBM);REEL/FRAME:014500/0538 Effective date: 20030407 |
|
CC | Certificate of correction | ||
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20111209 |