Patent Grant
11450979
The subject matter herein relates generally to receptacle connectors having alignment features.
High speed electrical connectors typically transmit and receive data signals across a mating interface. For example, some known receptacle connectors are mounted to a circuit board and include a card slot that receives a card edge of a plug connector at the mating interface. The receptacle connectors have contacts with deflectable spring beams at the mating interface that are spring loaded against the plug connector when the plug connector is loaded into the slot. However, known receptacle connectors are not without disadvantages. For example, the beams of the contacts may be over-deflected causing stress and/or plastic deformation, which may lead to low contact normal force on subsequent mating cycles.
A need remains for a receptacle connector that limits beam travel to reduce the risk of plastic deformation of the metal contacts.
In an embodiment, a receptacle connector configured to mate with a plug connector is provided including a housing having a mating end at a top of the housing configured to mate with the plug connector and a mounting end at a bottom of the housing configured to be mounted to a circuit board. The housing has first and second side walls extending between the top and the bottom and first and second end walls extending between the top and the bottom. The housing holds a plurality of contacts in first and second contacts arrays along the first and second side walls, respectively. The contacts have mating ends configured for electrical connection with the plug connector. The contacts have terminating ends configured for electrical connection with the circuit board. The housing has a card slot open at the mating end for receiving the plug connector. The card slot is defined by interior surfaces of the first and second side walls. The mating ends of the contacts are exposed in the card slot for mating electrical connection with the plug connector. The housing has alignment tabs extending inward into the card slot from the interior surface for aligning the plug connector within the card slot.
In another embodiment, a receptacle connector configured to mate with a plug connector is provided including a housing having a mating end at a top of the housing configured to mate with the plug connector and a mounting end at a bottom of the housing configured to be mounted to a circuit board. The housing has first and second side walls extending between the top and the bottom and first and second end walls extending between the top and the bottom. The housing has contact channels holding corresponding contacts in first and second contacts arrays along the first and second side walls, respectively. The contacts having terminating ends configured for electrical connection with the circuit board and mating ends configured for electrical connection with the plug connector. The mating ends are deflectable within the contact channels when mated with the plug connector. The housing has over-travel blocks in the contact channels blocking deflection of the mating ends beyond an over-travel limit of the contacts. The housing has a card slot open at the mating end for receiving the plug connector defined by interior surfaces of the first and second side walls. The mating ends of the contacts are exposed in the card slot for mating electrical connection with the plug connector. The housing includes alignment tabs extending inward into the card slot from the interior surface for aligning the plug connector within the card slot.
In a further embodiment, a receptacle connector configured to mate with a plug connector is provided including a housing having a mating end at a top of the housing configured to mate with the plug connector and a mounting end at a bottom of the housing configured to be mounted to a circuit board. The housing has first and second side walls extending between the top and the bottom and first and second end walls extending between the top and the bottom. The housing has a card slot open at the mating end for receiving the plug connector. The housing has contact channels holding corresponding contacts in first and second contacts arrays along the first and second side walls, respectively. The contacts have terminating ends configured for electrical connection with the circuit board and mating ends configured for electrical connection with the plug connector. The mating ends are deflectable within the contact channels when mated with the plug connector. The housing includes over-travel blocks in the contact channels blocking deflection of the mating ends beyond an over-travel limit of the contact.
The receptacle connector 104 includes a housing 106 extending between a mating end 108 and a mounting end 110. The mounting end 110 is terminated to a top surface of the circuit board 102. The mating end 108 defines an interface for connecting to the plug connector 105. In the illustrated embodiment, the mating end 108 defines a socket or card slot 112 that is configured to receive the plug connector 105 therein. For example, a mating end of the plug connector 105 may be defined by a card edge 114 (
The receptacle connector 104, in the illustrated embodiment, is a vertical board-mount connector such that the card slot 112 is configured to receive the plug connector 105 in a loading direction that is transverse to, such as perpendicular to, the top surface of the circuit board 102. In an alternative environment, the receptacle connector 104 may be a right angle style connector that is configured to receive the plug connector 105 in a loading direction that is parallel to the top surface. In another alternative embodiment, as shown in
The housing 106 of the receptacle connector 104 holds a plurality of contacts 116 held at least partially within the housing 106. The housing 106 extends between a top 118 and an opposite bottom 120. The top 118 defines the mating end 108 of the connector 104 such that the card slot 112 extends into the connector 104 via the top 118. The bottom 120 may define at least a portion of the mounting end 110 of the connector 104. For example, the bottom 120 abuts or at least faces the top surface of the circuit board 102. The card slot 112 is defined by a first side wall 122, a second side wall 124, and first and second end walls 126, 128 that each extend between the side walls 122, 124. The side walls 122, 124 and end walls 126, 128 extend from the top 118 of the housing 106 towards the bottom 120. As used herein, relative or spatial terms such as “front,” “rear,” “first,” “second,”, “top”, “bottom”, “left,” and “right” are only used to distinguish the referenced elements and do not necessarily require particular positions or orientations in the connector system 100 or the receptacle connector 104 relative to gravity or relative to the surrounding environment.
The contacts 116 of the receptacle connector 104 are configured to provide conductive signal paths through the receptacle connector 104. For example, each contact 116 includes a contact beam or spring beam defining a mating end 130 of the contact 116 configured to engage and electrically connect to a corresponding conductor (for example, trace or mating contact) of the plug connector 105 within the card slot 112 when the plug connector 105 is fully mated to the receptacle connector 104. The mating end 130 engages the mating conductor at a separable mating interface. The mating ends 130 are disposed within the card slot 112. The contacts 116 further include terminating ends 132 configured to be terminated to corresponding contact elements (not shown) of the circuit board 102 via thru-hole mounting to conductive vias, surface-mounting to conductive pads, and/or the like. In the illustrated embodiment, the terminating ends 132 of the contacts 116 are surface-mounted to pads on the top surface of the circuit board 102 and may be soldered to the pads on the circuit board 102.
In an embodiment, the contacts 116 are organized in at least one contact array 134. The contacts 116 in a respective array 134 are arranged side-by-side in a row. In the illustrated embodiment, the contacts 116 are organized in two arrays 134. The only portions of the contacts 116 in a first contact array 134A of the two arrays 134 that are visible in
The contacts 116 are distributed in the arrays 134A, 134B. For example, the first array 134A is provided in one contact sub-assembly 138 and the second array 134B is provided in the other contact sub-assembly 138. The mating ends 130 of the contacts 116 in the first array 134A are arranged side-by-side in a first row 144 (
Each contact 116 extends continuously between the terminating end 132 and the mating end 130. Adjacent contacts 116 in the same array 134 may extend parallel to one another. The contacts 116 are composed of an electrically conductive material, such as one or more metals. The contacts 116 may be stamped and formed into shape from a flat sheet of metal. In an embodiment, at least some of the contacts 116 of the receptacle connector 104 are used to convey high speed data signals and some other contacts 116 are used as ground conductors to provide electrical shielding for the high speed signals and ground paths through the receptacle connector 104. Some of the contacts 116 may be used to provide low speed data signals, power, or the like, instead of high speed data signals.
The contacts 116 in each array 134 are evenly spaced-apart along the longitudinal axis of the contact assembly 136. In an embodiment, the contacts 116 are held in place by the dielectric carrier 140. The dielectric carrier 140 extends between a top 152 and a bottom 154. The dielectric carrier 140 has a front 156 and a rear 158 between the top 152 and the bottom 154. The rears 158 of the dielectric carriers 140 face and may abut against each other when the contact assembly 136 is assembled. The rear 158 of each dielectric carrier 140 may include one or more securing features 160 for securing the dielectric carriers 140 together when the contact assembly 136 is assembled. The securing features 160 may interact with each other to secure the contact sub-assemblies 138 together. For example, the securing features 160 may be any combination of posts, openings, latches, catches, clips, fasteners or other types of securing features. In other alternative embodiments, rather than having two dielectric carriers 140, the contact assembly 136 may include a single dielectric carrier 140 holding either both arrays 134 or a single array 134. The fronts 156 of the dielectric carriers 140 may face in opposite directions and may engage the housing 106. The front 156 of either or both dielectric carriers 140 may include one or more securing features 162 for securing the contact assembly 136 to the housing 106. The securing features 162 may interact with corresponding securing features of the housing 106 to secure the contact assembly 136 to the housing 106. For example, the securing features 162 may be any combination of clips, latches, catches, protrusions, openings or other types of securing features.
The contacts 116 extend through the dielectric carrier 140 such that the mating ends 130 protrude from the top 152 and terminating ends 132 protrude from the bottom 154 with the dielectric carrier 140 engaging and holding an intermediate section 164 of the contacts 116 to retain the relative positioning and orientations of the contacts 116. The dielectric carrier 140 is formed of a dielectric material, such as a plastic or one or more other polymers. Optionally, the dielectric carrier 140 may be overmolded around the contacts 116. Alternatively, the contacts 116 may be loaded or stitched into the dielectric carrier 140.
In an exemplary embodiment, the mating ends 130 are deflectable into the contact channels 180 when the plug connector 105 is loaded into the card slot 112. When the mating ends 130 are deflected, the contacts 116 are spring loaded against the plug connector 105 due to an internal biasing force exerted by the spring beams of the contacts 116. Spring loading the contacts 116 creates a mechanical and electrical connection with the plug connector 105.
In an exemplary embodiment, the housing 106 includes features that center the plug connector 105 within the card slot 112 to prevent over-travel of any of the contacts 116 caused when the mating ends 130 are deflected beyond an elastic limit. Centering the plug connector 105 also balances the opposing spring forces of the two rows of contacts 116.
The card slot 112 is defined by interior surfaces 202, 204 of the first and second side walls 122, 124, respectively. The interior surfaces 202, 204 oppose each other on opposite sides of the card slot 112. In an exemplary embodiment, the mating ends 130 of the contacts 116 extend beyond the interior surfaces 202, 204 into the card slot 112 such that the mating ends 130 may interface with the plug connector 105 when plugged into the card slot 112.
The alignment tabs 200 extend into the card slot 112 from the interior surfaces 202, 204 for positioning the plug connector 105 within the card slot 112. As such, the width of the card slot 112 between the alignment tabs 200 is less than the width of the card slot 112 along other portions of the card slot 112. In an exemplary embodiment, the housing 106 includes alignment tabs 200 at each corner 206 of the card slot 112 defined by the intersections between the side walls 122, 124 and the end walls 126, 128. Optionally, the alignment tabs 200 may be provided at the ends walls 126, 128. For example, the alignment tabs 200 may be positioned outward of the contact arrays 134A, 134B, such as between the contacts 116 and the end walls 126, 128. The alignment tabs 200 may be provided at other locations in alternative embodiments.
In an exemplary embodiment, the housing 106 includes chamfered surfaces 208 at the top 118 that provide a lead-in for the plug connector 105 into the card slot 112. The chamfered surfaces 208 may be provided on the side walls 122, 124 and/or the end walls 126, 128. The chamfered surfaces 208 guide the plug connector 105 into the card slot 112. In an exemplary embodiment, the chamfered surfaces 208 extend to the alignment tabs 200. For example, the chamfered surfaces 208 may extend onto top ends of the alignment tabs 200, such that the top ends of the alignment tabs 200 are chamfered.
The alignment tabs 200 include alignment surfaces 210 facing the card slot 112. The alignment surfaces 210 are positioned interior of the interior surfaces 202, 204 of the first and second side walls 122, 124. For example, the alignment tabs 200 extend beyond the interior surfaces 202, 204 into the card slot 112. The alignment tabs 200 are used to hold the plug connector 105 (
In an exemplary embodiment, both alignment tabs 200 extend the same distance from the corresponding side walls 122, 124 such that the plug connector 105 may be centered between the side walls 122, 124. For example, the alignment tabs 200 have a tab center line 220 centered between the alignment surfaces 210 of the alignment tabs 200. The tab center line 220 is aligned with a card slot center line 222 of the card slot 112 centered between the interior surfaces 202, 204 of the first and second side walls 122, 124. Because the tab center line 220 is aligned with the card slot center line 222, the alignment tabs 200 serve to center the plug connector 105 between the mating ends 130 of the contacts 116.
As shown in
The mating ends 130 may be deflected outward, such as into the contact channels 180, when the plug connector 105 is loaded into the card slot 112. For example, relief slots 234 are provided in the side walls 122, 124 to receive the contacts 116 when the contacts 116 are deflected outward.
The alignment tabs 200 serve to center the plug connector 105 within the card slot 112 such that the plug connector 105 does not overstress the spring beams of the contacts 116. For example, the alignment tabs 200 restrict the plug connector 105 from being loaded too close to the first side wall 122 or too close to the second side wall 124, which may overstress the corresponding contacts 116. By centering the plug connector 105 in the card slot 112, neither row of contacts 116 is overstressed.
In an exemplary embodiment, the housing 106 includes over-travel blocks 240 to block deflection of the mating ends 130 of the contacts 116 beyond an over-travel limit of the contacts 116. In the illustrated embodiment, the over-travel blocks 240 are provided in the contact channels 180. For example, the over-travel blocks 240 may be provided in the relief slots 234 behind the mating ends 130. Optionally, the over-travel blocks 240 may be positioned being the interface bumps 230 to block deflection of the mating ends 130.
The over-travel blocks 240 may have any shape to interact with the contacts 116. In the illustrated embodiment, the over-travel blocks 240 are rectangular in shape with corners 242 of the over-travel blocks 240 engaging two different points of the interface bumps 230 to block deflection of the contacts 116 beyond the over-travel limit. However, the over-travel blocks 240 may have other shapes in alternative embodiments, such as a curved shape matching the curved shape of the interface bumps 230. In other alternative embodiment, the over-travel blocks 240 may be used to block other portions of the contacts 116, such as the distal end of the contact 116 or a portion of the contact 116 below the interface bumps 230.
Prior to loading the plug connector 105 into the card slot 112 the mating ends 130 of the contacts 116 may be spaced-apart from the over-travel blocks 240 such that a gap 244 exists between the contacts 116 and the over-travel blocks 240. When the plug connector 105 is loaded into the card slot 112, the mating ends 130 may be deflected outward into the first and second side walls 122, 124 until the contacts 116 engage the over-travel blocks 240. The over-travel blocks 240 limit deflection of the mating ends 130 of the contacts 116 and hold the contacts 116 against the plug connector 105.
Optionally, the shape of the interface bumps 230 may change when the plug connector 105 is loaded into the card slot 112. For example, as the interface bumps 230 are squeezed between the plug connector 105 and the over-travel blocks 240, the shape of the interface bumps 230 may change. For example, the interface bumps 230 may become flatter as the contact 116 is sandwiched between the over-travel block 240 and the plug connector 105.
In other various embodiments, the over-travel blocks 240 may hold the positions of the contacts 116 such that very little or no deflection of the mating ends 130 is allowed when the plug connector 105 is loaded into the card slot 112. For example, the over-travel blocks 240 in both the first and second side walls 122, 124 hold the contacts 116 such that the mating interfaces 232 between the contacts 116 on opposite side of the card slot 112 are spaced-apart by the width of the card edge 114 of the plug connector 105 such that the plug connector 105 is centered between the contacts 116 within the card slot 112. The alignment tabs 200 (shown in
It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments (and/or aspects thereof) may be used in combination with each other. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Dimensions, types of materials, orientations of the various components, and the number and positions of the various components described herein are intended to define parameters of certain embodiments, and are by no means limiting and are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. Further, the limitations of the following claims are not written in means-plus-function format and are not intended to be interpreted based on 35 U.S.C. § 112(f), unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
This application is a continuation application of U.S. patent application Ser. No. 16/572,247 filed Sep. 16, 2019, which is a continuation application of U.S. patent application Ser. No. 15/230,853 filed Aug. 8, 2016 (now U.S. Pat. No. 10,439,311, issued Oct. 8, 2019), the subject matter of each are herein incorporated by reference in their entirety.
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| Number | Date | Country | |
|---|---|---|---|
| Parent | 16572247 | Sep 2019 | US |
| Child | 17073974 | US | |
| Parent | 15230853 | Aug 2016 | US |
| Child | 16572247 | US |
