The invention relates generally to electrical connector assemblies, and more particularly, to electrical connector assemblies for pluggable electronic modules.
Some known electrical connector assemblies include a metal cage having a plurality of ports the each receive a small form factor pluggable (SFP) module therein. The pluggable modules may plug into an electrical connector that is held within the cage and is electronically connected to a host circuit board. An end of the cage that includes the ports for the pluggable modules is typically held within a panel of a housing that contains the host circuit board therein. For example, the housing may be a housing for a computer that includes the host circuit board. The end of the cage that is held within the panel typically includes a plurality of springs formed integrally from a wall thereof. The springs extend circumferentially about the end of the cage and exert a spring force on an interior surface of the panel opening that receives the cage end to securely hold the cage end within the panel opening. The springs also facilitate containing electromagnetic interference (EMI) emissions by providing a plurality of contact points that ground the cage to the panel.
However, maintaining a predetermined structural integrity of the cage at the end held within the panel opening limits the number of springs that can be formed from the cage wall. Accordingly, maintaining the predetermined structural integrity may limit the number of contact points that facilitate the containment of EMI emissions. Specifically, if the cage wall is formed with too many springs, the structural integrity of the cage wall at the end held within the panel opening may fall below design limits, thereby leading to instability and possible deformation of the cage. Therefore, the springs must be spaced far enough apart along the circumference of the cage wall such that the structural integrity of the cage wall at the end held within the panel opening does not fall below design limits.
There is a need for an electrical connector assembly that includes a cage that facilitates minimizing EMI emissions while maintaining a predetermined structural integrity of the cage.
In one aspect, an electrical connector assembly is provided. The electrical connector assembly includes a cage member configured for mounting in an opening in a panel. The cage member has at least one compartment for receiving a pluggable electrical component therein. An EMI gasket is mounted externally on the cage member. The EMI gasket includes a dielectric carrier holding a plurality of electrically conductive springs that are configured to engage the panel when the cage member is mounted in the opening in the panel.
In another aspect, an electrical connector assembly is provided. The electrical connector assembly includes a cage member configured for mounting in an opening in a panel. The cage member has at least one compartment for receiving a pluggable electrical component therein. An electrical connector is at least partially held by the cage member. The electrical connector is configured to electrically connect to the pluggable electrical component when the pluggable electrical component is received within the compartment. An EMI gasket is mounted externally on the cage member. The EMI gasket includes a dielectric carrier holding a plurality of electrically conductive springs that are configured to engage the panel when the cage member is mounted in the opening in the panel.
Although the cage member 12 is shown as including eight internal compartments arranged in two rows and four columns, the cage member 12 may include any number of internal compartments 40, arranged in any number of rows and columns, for receiving any number of pluggable electrical components 22.
The cage member 12 may have features that ground the cage member 12 to the circuit board 20, the panel 26, and/or another circuit board and/or panel. For example, the cage member body 28 may include a plurality of printed circuit board tines 64 and/or 66, which may both mechanically hold and ground the cage member body 28 to the circuit board 20. Additionally or alternatively, the cage member body 28 may include one or more resilient tongues 68 extending from the lower wall 32 to provide grounding of the cage member body 28 to the circuit board 20. The upper and lower walls 50 and 52, respectively, of the central separator member 42 may include grounding tabs 70 adjacent the front face portion 54 thereof for grounding a pluggable electrical component 22 that is received within the corresponding internal compartment 40. The grounding tabs 70 may include latching openings 72, as will be described in more detail below. The cage member body 28 may include kick-out springs 74 to facilitate removing the electrical connectors 14 from the body 28.
The spring carrier 76 and the spring assemblies 78 may have any suitable configuration and/or arrangement, and/or may include any suitable structure and/or means, that enable the spring assemblies 78, the spring carrier, and the gasket 16 to function as described herein. Moreover, the spring assemblies 78 may be held by the spring carrier 76 in any suitable manner, configuration, arrangement, and/or orientation, and/or using any suitable structure and/or means, that enable the spring carrier 76, the spring assemblies 78, and the gasket 16 to function as described herein. One example of the two preceding sentences is the exemplary embodiment illustrated in
The base 94 engages the cage member body 28 to provide an electrical connection between the individual springs 88 and the cage member 12. The base 94 connects to an end portion 100 of the spring carrier body 80 where a surface 102 of the body 80 intersects a radially inner surface 104 of the radially inner side 82 of the body 80. Specifically, the base 94 defines a channel 106 that overlaps the end portion 100 such that a wall 108 of the channel 106 engages the radially inner surface 104 of the spring carrier body 80, and such that a wall 110 of the channel 106 engages the surface 102 of the body 80. The base 94 may be secured to the end portion 100 in any suitable manner, configuration, and/or arrangement, and/or using any suitable structure and/or means, that enables the gasket 16 to function as described herein. For example, in the exemplary embodiment, the channel wall 110 includes a plurality of openings 112 that each receives an extension 114 that extends outwardly from the surface 102 of the spring carrier body 80. The channel wall 110 may include any number of openings 112 that each receives any number of extensions 114. In addition or alternative to the openings 112/extensions 114, another example includes a snap-fit arrangement, wherein the channel 106 is provided with a size and/or shape such that the channel walls 108 and/or 110 are deformed and/or displaced when the channel 106 overlaps the end portion 100 of the spring carrier body 80. In such a snap-fit arrangement, the channel 106 forms a spring portion of the spring assembly 78 that engages, or overlaps, the end portion 100 of the spring carrier body 80. The channel 106, or spring portion, holds the base 94 on the end portion 100 via the bias of the spring portion to return to its non-deformed and/or non-displaced size and/or shape.
The body 80 of the spring carrier 76 includes a plurality of slots 116 for receiving the individual spring bodies 96 when the base 94 is connected to the spring carrier body 80. In the exemplary embodiment, each slot 116 receives one individual spring 88 therein, however one or more slots 116 may alternatively each receive two or more individual springs 88 therein. The spring carrier body 80 may include any number of slots 116 for receiving any number of individual springs 88. The individual spring bodies 96 extend within the slots 116 such that the free end portions 98 engage an end portion 118 of the spring carrier body 80 that is opposite the end portion 100. A portion of each of the slots 116 extends completely through the spring carrier body 80 such that when the individual springs 88 are received within the slots 116, the radially outer side 84 of the spring carrier body 80 includes the spring portions 90 of the individual springs 88 extending along the side 84, and such that the radially inner side 82 of the spring carrier body 80 includes other portions of the individual springs 88 (e.g., at least a portion of the free end portions 98 and the channel wall 108). Although the individual spring bodies 96 are described and illustrated in the exemplary embodiment as having a length extending in a direction generally perpendicular to the length of the legs 92 of the spring carrier body 80, the spring carrier body 80 and/or the spring assemblies 78 may be configured such that the individual spring bodies 96 extend in any other direction relative to the length of the legs 92 when the spring assemblies 78 are held by the spring carrier 76, such as a direction generally parallel or generally oblique relative to the length of the legs 92.
Although each spring assembly 78 is described and illustrated herein in the exemplary embodiment as including a plurality of individual springs 88, each spring assembly 78, and/or the gasket 16 overall, may include any number of individual springs, including only one individual spring. Similarly, although the spring carrier 76 is described and illustrated herein in the exemplary embodiment as including four spring assemblies 78 (one for each leg 92 of the spring carrier body 80), the spring carrier 76 may hold any number of spring assemblies 78, including only one spring assembly 78. For example, one or more legs 92 of the spring carrier body 80 may not hold a spring assembly 78, one or more legs 92 of the spring carrier body 80 may hold more than one spring assembly 78, and/or a plurality of the legs 92 of the spring carrier body 80 may hold a common spring assembly 78 (e.g., two or more of the legs 92 are connected to a common base 94 as described and illustrated with respect to
Referring now to
When the cage member end portion 18 is received within the panel opening 24, the spring portion 90 of each individual spring 88 engages the surface 91 defining the panel opening 24. If included, the gasket flange 86 may limit how much of the cage member end portion 18 extends through the panel opening 24. The engagement between the spring portions 90 and the panel opening surface 91 facilitates containing electromagnetic interference (EMI) emissions by providing a plurality of contact points that ground the cage member 12 to the panel 26. The engagement between the spring portions 90 and the panel opening surface 91 also facilitates securely holding the cage member end portion 18 within the panel opening 24. Specifically, as the cage member end portion 18 is received within the panel opening 24, the panel opening surface 91 displaces and/or deforms the spring portions 90 generally radially inwardly against their bias, which exerts a spring force on the panel opening surface 91 to securely hold the cage member end portion 19 within the panel opening 24. The spring assemblies 78 may be held within the spring carrier 76 such that the spring portions 90 are non-deformed and/or non-displaced from their natural size and/or shape when the cage member end portion 18 is not received within the panel opening 24. In such an embodiment, the panel opening surface 91 displaces and/or deforms the spring portions 90 from their natural size and/or shape as the cage member end portion 18 is received within the panel opening 24. In such an embodiment, a size, shape, and/or material of the spring portions 90 may be selected to provide a predetermined spring force.
Alternatively, the spring assemblies 78 may be held within the spring carrier 76 such that the spring portions 90 are initially deformed and/or displaced from their natural size and/or shape when the cage member end portion 18 is not received within the panel opening 24. For example, the spring portions 90 may be deformed and/or displaced such that they have an increased curvature from their natural size and/or shape. In such an embodiment, as the cage member end portion 18 is received within the panel opening 24, the panel opening surface 91 displaces and/or deforms the spring portions 90 generally radially inwardly against the bias of their initially deformed and/or displaced size and/or shape. In such an embodiment, in addition or alternative to a size, shape, and/or material of the spring portions 90, a length of the slots 116 may be selected to provide the spring portions 90 with an initial deformation and/or displacement that provides a predetermined spring force.
The electrical connector 14 can be positioned within the cage member 12 by inserting the connector 14 through the openings 58 and 60 (
The pluggable electrical component 22 also includes an electrical interconnection to an interface (not shown) at an end portion 150 that is opposite the plug portion 126, such as, but not limited to, a copper interface in the way of a modular jack (not shown), or to a fiber optic connector (not shown) for further interfacing. The pluggable electrical component 22 may include grounding tabs 152 and/or 154 for grounding the pluggable electrical component 22 to the cage member 12. A raised embossment 156 may also be provided for cooperation with the latching openings 72 (
The embodiments described and illustrated herein provide an electrical connector assembly that includes a cage member that facilitates minimizing EMI emissions while maintaining a structural integrity that is within design limits.
Exemplary embodiments are described and/or illustrated herein in detail. The embodiments are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component, and/or each step of one embodiment, can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles “a”, “an”, “the”, “said”, and “at least one” are intended to mean that there are one or more of the element(s)/component(s)/etc. The terms “comprising”, “including” and “having” are intended to be inclusive and mean that there may be additional element(s)/component(s)/etc. other than the listed element(s)/component(s)/etc.
While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.