# Patent

## Title
Connector guide member

## Abstract

A shroud that forms a guide channel for a connector is disclosed and it has the shape of an inverted U-shape, with a press tab for engaging a mating connector. The shroud has notches and tabs formed on it that serve to orient the mating connector for entry into the shroud. A placement member is also described and it serves to hold the connector and the shroud together as a single unit for robotic placement of the shroud and connector in preselected positions on the circuit board.

## Background
REFERENCE TO RELATED APPLICATIONS
This application claims priority from prior U.S. provisional Patent Application No. 60/655,673, filed Feb. 23, 2005.
BACKGROUND OF THE INVENTION
The present invention relates generally to connector shrouds, and more particularly to a shroud and placement member that cooperate as an engaged assembly for mounting the shroud and an associated connector on a circuit board.
Most small form factor pluggable style connectors are surface mounted to a circuit board and then are enclosed in a metal or metallic shielding cage. The use of this external cage requires that the connector be first mounted to a circuit board, and then the cage must be mounted to the circuit board. Many times the connector may be of a surface mount style, while the shielding cage is of a press fit style, meaning that each of the two components must be separately applied to the circuit board. This adds cost to the assembly process of the electronic device the connector and cage are used in.
In order to speed the assembly process and to reduce the costs involved, it is desirable that the connector and cage somehow be formed so as top enable their placement by a robotic assembler. Also, inasmuch as components other than the receptacle connector are applied to the supporting circuit board, it is desirable to provide a means for guiding a plug connector into engagement with the receptacle connector which also provides a measure of electrical shielding.
The present invention is directed to guide member that overcomes the aforementioned disadvantages.
SUMMARY OF THE INVENTION
Accordingly, it is a general object of the present invention to provide a connector and shroud, or guide member, that are easily mounted to a circuit board by automated means.
Another object of the present invention is to provide a metal shroud for use with an associated circuit board connector, the shroud being positioned away from the connector and having a pressure tab that extends toward the connector to define a contact member that engages the exterior of a corresponding mating plug connector.
A further object of the invention is to provide a shroud having at least one interior biasing member that applies a biasing force onto a mating plug connector to properly direct the plug connector into contact with the circuit board connector, and the shroud further having a means for engaging two opposing sides of the plug connector to align the plug connector with the circuit board connector.
A still further object of the present invention is to provide a placement member that is insertable into the shroud and which has a forward engagement face that mates with the circuit board connector so that the circuit board connector and the shroud may be properly spaced apart as an assembly and the placement members having one or more planar surfaces disposed thereon that may be used for vacuum deposit onto a circuit board.
Yet another object of the present invention is to provide an insulative insert that is insertable into and engageable with the metal shroud, the insert having additional means for engaging a surface mount circuit board connector, the engagement means taking the form of a pair of engagement arms, or a blade member that engages a portion of the circuit board connector, while supporting the shroud in its proper distance and orientation with respect to the circuit board connector so that the circuit board connector and shroud may be placed as a unit, onto a circuit board.
Still yet another object of the present invention is to provide a metal guide member for use with an associated receptacle connector that is mounted to a circuit board, the guide member providing a means for guiding in an opposing plug connector into alignment and engagement with the receptacle connector, the guide member having three sides defining a hollow interior cavity that receives the plug connector therein, the guide member including a plurality of strengthening ribs formed therein that modify the cross-section of the sides of the guide member to provide increased resistance to bending.
The present invention accomplishes these and other objects by way of its structure. In a first embodiment of the invention, a shroud, or guide, is provided having a top and two spaced-apart sidewalls. The shroud has a general inverted U-shape, when viewed from an end, and when placed on a circuit board spaced apart from a connector mounted to the circuit board, it provides a channel that may guide an opposing connector into engagement with the circuit board connector. The shroud also serves to retain the mating connector in place.
The shroud has a front face and a rear face, and a press tab extends outwardly from the shroud along the rear face in a cantilevered fashion and engages an upper surface of the mating connector when it is inserted into the shroud. The front face of the shroud has one or more tabs formed thereon, and these tabs serve to orient the mating connector when they are properly received within corresponding slots, or notches, disposed on the mating connector housing.
The rear face of the shroud also may include two tabs that are bent inwardly upon the shroud to form a pair of spring arms, and these spring arms preferably extend lengthwise within the interior shroud toward the rear of the shroud. The spring arms terminate in free ends, which are captured by other tabs to define an overall biasing structure that resembles a leaf spring. These spring arms serve to exert a downward pressure onto the housing of the mating connector to ensure that it will be inserted into the shroud and mated with the circuit board connector properly.
The shroud may further include one or more slots or recesses in its top wall that are engaged by clip or lugs formed on the mating connector as part of a mating mechanism. The shroud can also include a pair of notches that are formed in the shroud sidewalls, and preferably along the front edges thereof. These notches engage corresponding lugs formed on the mating connector housing. With the present invention, the spring arms of the shroud serve to orient and position the mating connector in the vertical direction and the notch-lug combination serve to orient the mating connector in the horizontal direction.
In another embodiment of the present invention, a placement, or insert, member is provided that serves to engage both the circuit board connector and the shroud, and it positions them in their spacing at which they would be mounted to a circuit board. As such, the placement member forms an assembly or unit with the shroud and connector that may be robotically placed onto the circuit board. The placement member includes a plurality of planar surfaces disposed thereon in either or both horizontal and vertical planes.
The placement member include a body portion that fits in the interior of the shroud and it has notches and recesses in similar locations to those used on the mating connector so that it will be properly oriented in the shroud. The placement member preferably includes a primary clip member disposed on the top of the placement member and which engages the top wall of the shroud. A pair of rails may be provided in opposition to the primary clip with guide surfaces to facilitate assembly of the placement member to the shroud.
The placement member also preferably includes an extending tab that will pass over the top of the circuit board connector and engages the press tab formed in the shroud. A pair of secondary clips are also provided along one face of the placement member and these secondary clips extend into engagement with the circuit board connector, preferably on the underside thereof so that they exert an upward directed engagement force on the connector while the placement member rear tab and the shroud press tab exert a downward directed force on the connector. By the use of the balanced force arrangement, the circuit board connector, shroud and placement member are maintained together as a unit during assembly, transportation and robotic application.
In another embodiment of the invention, the guide member is formed by bending a piece of sheet metal into a hollow box-like structure with three sides, two of the sides defining sidewalls of the guide member and the third side defining a top wall of the guide member. The hollow interior of the structure receives a plug connector and the top wall or two sidewalls may include one or more, and preferably two, guide tabs that extend from away from the structure's sides. These guide tabs serves to orient one surface of the plug connector, while slots, or notches may be formed in one or both of the two side walls to provide an additional means for guiding a plug connector into the interior of the guide member.
In order to resist the stress which may be incurred from repeated insertions and removals of the associated plug connector, the sides of the guide member are preferably provided with one or more strengthening aspects, which in the preferred embodiment, include reinforcement ribs that are formed in the sides. These ribs desireably run transversely in the top wall and longitudinal in the side walls. The ribs serve to modify the cross section of the sides of the guide member, in a manner that increases the moment of inertia of the side, which thereby increases the resistance of the specific side to bending. This provides a durable guide member structure that will reliably complete numerous insertions and withdrawals of an associated plug connector.
These and other objects, features and advantages of the present invention will be clearly understood through a consideration of the following detailed description



BRIEF DESCRIPTION OF THE DRAWINGS
In the course of this description, references will be made to the drawings, in which:
FIG. 1 is a perspective view of a connector and shroud constructed in accordance with the principles of the present invention and with a plug connector shown in alignment with but spaced apart from the connector and shroud;
FIG. 2 is the same view as FIG. 1, but taken from a low angle and with the plug connector removed for clarity to illustrate parts of the circuit board connector through the interior of the shroud;
FIG. 3 is the same view as FIG. 1, but with the plug connector partially inserted into the shroud;
FIG. 4 is the same view as FIG. 3, but with the plug connector fully engaged in the shroud and in mating engagement with the circuit board connector;
FIG. 5 is a perspective view of the plug connector of FIG. 1, taken from the front thereof;
FIG. 6 is a sectional view of the shroud of FIG. 1, taken along lines 6-6 thereof, and the circuit board connector removed from clarity;
FIG. 6A is a perspective view of the shroud, taken from the top and illustrating its interior and its circuit board mounting members;
FIG. 7 is a sectional view of FIG. 1, taken generally along lines 6-6 thereof, but with the plug connector in place within the shroud and mated to the circuit board connector;
FIG. 8 is an exploded view of the circuit board connector, shroud of FIG. 1 and a placement member that is constructed in accordance with the principles of the present invention;
FIG. 9 is a perspective view of the placement member inserted into the shroud and engaged with the circuit board connector;
FIG. 10 is a perspective view of the placement member of FIG. 8;
FIG. 10A is a slight perspective view of the front end of the placement member of FIG. 8;
FIG. 11 is a sectional view of FIG. 10, taken along lines 11-11 thereof to illustrate the manner of engagement that the placement member has with the shroud and the circuit board connector;
FIG. 12 is the same view as FIG. 11, but taken along a different location to illustrate the manner of engagement between the placement member and the circuit board connector;
FIG. 13 is a perspective view of another embodiment of a guide member constructed in accordance with the principles of the present invention, supported on a circuit board and aligned with a receptacle connector;
FIG. 14 is a front end elevational view of the guide member of FIG. 13; and,
FIG. 15 is a bottom plan view of the guide member of FIG. 13.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 illustrates a first embodiment of the invention, namely a shroud, or guide 100, having a top wall 102 and two spaced-apart sidewalls 104. 105. The shroud 100 has a general inverted U-shape when viewed from an end, and when placed on a circuit board 110 spaced apart from a connector 150 mounted to the circuit board 110. The shroud 100 provides a hollow channel 106 that may guide an opposing (plug-style) connector 200 into engagement with the circuit board connector 150. The shroud 100 also serves to retain the mating connector 200 in place.
As shown in FIGS. 2 & 6A, the shroud 100 has a front face 115 and a rear face 116. A press tab, or press arm 117, is formed with the shroud 100, and the tab 117 extends outwardly from the shroud 100 along the rear face 116 in a cantilevered fashion. (FIG. 6A.) The purpose of this press tab 117 is to engage an upper surface 202, preferably a channel, or recess 290, of the mating connector 200 when it is inserted into the interior channel 106 of the shroud 100. The front face 115 of the 100 shroud has one or more tabs 118 formed thereon. These tabs 118 are formed along an edge of the side walls, and preferably along the front face 115 of the shroud 100, and as shown best in FIG. 1, they are disposed along the base 119 of the two shroud sidewalls 104, 105. These tabs 118 serve to orient the mating connector 200 when they are properly received within corresponding slots, or notches 207, disposed on the mating connector housing 200.
The mating connector 200, as best illustrated in FIGS. 1, 3 & 5, has a generally polygonal structure, and is shown in the drawings as generally a solid rectangle with a top surface 202, two side walls 204, 205, a bottom wall 106 and a rear wall 208. Cables will usually exit from the rear wall, but they have been omitted from the drawings for clarity. The front face 210 of the connector defines a mating face of the connector and in applications such as shown in the drawings, the mating connector 200 will take the form of a plug connector with a forwardly projecting mating blade 212, typically the edge of a circuit card 214. The top surface 202 (and in the drawings, bottom surface 106) may have an extension 215 that extend forwardly above and below the circuit card 214.
The shroud press tab 117 is bent downwardly to impart a slight bias to it so that it will slidingly or abuttingly contact the top surface 202 of the mating connector 200, and in particular, the top extension 215 thereof. This type of engagement is shown best in FIG. 4, and the press tab edge preferably engages a recess 290, when either an audible signal
The rear face 116 of the shroud 100 also may include two tabs 120 that are bent inwardly upon the shroud 100, into its interior channel 106, to form a pair of spring arms 122, and these spring arms 122 preferably extend lengthwise within the interior channel 106 of the shroud 100 toward the front face 115 of the shroud 100. As shown in FIG. 6, the spring arms 120 have curved backbone portions 123 terminate that in free ends 124. These free ends engage other tabs 126 that define inner ledges 127 against which the free ends 124 are biased. The free ends 124 of the spring arms 122 are in essence “captured” in place by the other tabs 126 to define an overall biasing structure that resembles a leaf spring. These spring arms 122 serve to exert a downward pressure onto the housing of the mating connector 200. Particularly, the upper surface 202 thereof. This downward bias ensures that the mating connector 200 is inserted into the shroud properly so that it slides along the circuit board 110 and mated with the circuit board connector 150 properly.
The shroud 100 may further include one or more slots or recesses 130 in its top wall 102 that are engaged by clips, or lugs, 220 that are preferably formed on the mating connector 200 as part of a mating mechanism. These lugs 220 are moved in and out of engagement with the slots 130 by means of a push-type button 225, shown as formed from sheet metal.
The shroud 100 may also include a pair of notches 135 that are formed in the shroud sidewalls 104, 105 and preferably along the front edges thereof. These notches 135 engage corresponding lugs 226 formed on the mating connector housing 200. The lugs 226 have an overall T-shape when viewed from the side, with a center leg 227 that is received within the corresponding shroud notch 135 and two other legs that form a base 228 that is perpendicular the center leg. The base 228 serves as a stop when it abuts the edge of the sidewalls 104, 105. With the present invention, the spring arms 122 of the shroud 100 serve to orient and position the mating connector 200 in the vertical direction and the notches 135 and lugs 226 further cooperate to orient the mating connector 200 in the horizontal direction.
As shown in FIG. 6A, the shroud 100 may also include surface mount feet 138 that are formed along the bottom edges of the two sidewalls 104, 105. For purposes of properly orienting the shroud 100 on the circuit board 110, the shroud 100 may also include through hole pins 139 that are arranged in a polarizing pattern along the bottom edges of the sidewalls 104, 105.
The circuit board connector 150, to which the mating connector 200 mates, is a receptacle style connector with an insulative housing 151 that supports a plurality of conductive terminal 152, which are shown as having surface mount feet 153 that are connected to conductive pads arranged on the surface of the circuit board 110. The connector includes a card-receiving cavity 154 that receives the edge card 214 of the mating connector 200, and it includes a second cavity 155 beneath the first cavity 154. This second cavity receives the lower extension portion 2316 of the mating connector 200 and as such, it provides a measure of polarization to the connector so that the mating connector 200 will be properly mated therewith.
In another embodiment of the present invention, as illustrated in FIGS. 8-12, a placement, or insert, member 300 is provided that serves to engage both the circuit board connector 150 and the shroud 100 in a manner so that it positions them in their spacing at which they would be mounted to the circuit board 110. As such, the placement member 300 forms an assembly or unit with the shroud 100 and the connector 150 that may be robotically placed as a whole onto the circuit board 110. The placement member includes 300 a plurality of planar surfaces disposed thereon in either or both horizontal and vertical planes to permit a vacuum pick and place pie to contact.
The placement member 300 include a body portion 302 that fits in the interior channel 106 of the shroud 100 and it has notches 303 and recesses in similar locations to those used on the mating connector 200 so that the placement member 300 will be properly oriented in the shroud 100. The placement member 300 preferably includes a primary clip member 305 disposed on the top 304 of the placement member 300 and which engages the top wall 102 of the shroud 100. This clip 305 extends forwardly in a cantilevered fashion over a pair of rails 306 (FIG. 8) that are aligned in opposition to the primary clip 305. These rails 306 may include guide surfaces 310 at their forward ends so as to facilitate assembly of the placement member 300 to the shroud 100. The rails are spaced apart widthwise along the placement member top, and they preferably extend underneath the arms 304 of the primary clip 305. As shown in the drawings, the placement member may be easily inserted into the shroud 100 from the front. The top surface of the clip 305 is preferably planar so that it may serve as a vacuum pick and place surface.
The placement member 300 also preferably includes a forwardly extending tab 312 that will pass over the top of the circuit board connector 150 and engages the press tab 117 formed in the shroud rear face 116. This forward tab 312 extends past the leading edge 320 of the placement member body 302. A pair of secondary clips 314 are also provided along the forward face of the placement member 300 and these secondary clips 314 extend into engagement with the circuit board connector 150, preferably on the underside thereof and into the lower cavity 155, as shown best in FIG. 12. This is so they can exert an upward directed engagement force by way of their hook ends 325 on the connector 150 while the placement member forward tab 312 and the shroud press tab 117 exert a downward directed force on the connector 150. By the use such of the balanced force arrangement, the circuit board connector 150, shroud 100 and placement member 300 are maintained together as a unit during assembly, transportation and robotic application.
The placement member 300 has notches 303 that engage the tabs 118 on the shroud so that the placement member may be positioned properly within the shroud 100. As shown in FIG. 8, the shroud 100 used in this embodiment is a compressible mount to the circuit board 110, and so uses compliant pin tail portions 170. The placement member thus integrates the connector 150 and the shroud 100 into a single unit for easy robotic placement directly in place onto a circuit board without fear of significant deviation from its assigned position.
FIGS. 13-5 illustrate another embodiment of a connector guide member 400 constructed in accordance with the principles of the present invention. This guide member 400 also has three side walls 401, 402 & 403, two of which are vertical side walls and the other is a horizontal top wall 403. The general structure of this guide member 400 is similar to that described above, including the notches 405 formed in the forward edges of the two side walls 401, 402. Two guide tabs 406 are formed along the forward edges of the top wall 403 and the tabs 406 depend downwardly and they serve to orient the plug connector into the hollow interior of the guide member 400. The guide tabs 406 are spaced apart from each other in the horizontal direction and the guide member top wall 403 includes a pair of openings 409 that are also spaced apart horizontally, but which are disposed inside of the guide tabs 406 as illustrated.
The walls of the guide member may each include one or more reinforcing ribs 410 that are stamped in the walls. These ribs 410 extend longitudinally in the side walls 401, 402 and transversely in the top wall 403. The ribs 410 are stamped so that they project outwardly, and this projection serves to increase the resistance of the walls to bending forces that may be incurred due to insertions and removals of the plug connector into the guide member. This increase is accomplished by changing the cross-section of the walls so as to positively affect the moment of inertia of the wall, which in turn increase resistance of the walls to bending.
The guide member includes a press arm 420 extending rearwardly from the rear edge of the top wall 403, and two notches, or reentrant portions 421, are disposed in the top wall 403 adjacent the opposite sides of the press arm 420. (FIG. 15.)
While the preferred embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that changes and modifications may be made to these embodiments without departing from the spirit of the invention, the scope of which is defined by the appended claims.

## Claims

1. A guide member for guiding a plug connector into engagement with a receptacle connector, comprising:
a body including three distinct walls, the three walls including two side walls and a top wall interconnecting the two side walls together, the three walls cooperatively defining a hollow shell having a general inverted U-shape for mounting to a circuit board, the shell including at least one press arm disposed along a first edge thereof, the press arm for pressing against a portion of a plug connector inserted into the hollow shell, said shell including means for aligning the plug connector when said plug connector is inserted into said shell, the alignment means comprising first and second sets of alignment members, the first alignment members including a pair of guide tabs disposed on said body and located along a second edge of said shell opposite that of said press arm, the second alignment members including a pair of alignment notches located along the shell second edge and spaced apart from said guide tabs, the hollow shell further including at least one spring arm extending interiorly of said hollow shell in a lengthwise direction between said first and second edges.

2. The guide member of claim 1, further including a second pair of notches disposed on the first edge of said shell, located adjacent to opposite side edges of said press arm, the notches extending toward said shell second edge.

3. The guide member of claim 1, further including a pair of spring arms extending interiorly of said hollow shell between said hollow shell first and second edges.

4. The guide member of claim 3, wherein said spring arms extend into contact with said guide tabs.

5. The guide member of claim 3, wherein said spring arms extend lengthwise interiorly of said hollow shell in a rear to front direction and said spring arms include free end portions.

6. The guide member of claim 1, wherein said shell includes means for mounting said shell to a circuit board.

7. The guide member of claim 6, where said mounting means includes a plurality of through hole pins and surface mount feet.

8. The guide member of claim 1, further including a pair of engagement openings disposed in said shell top wall for engagement by an opposing plug connector, the guide opening engagement openings being positioned on said shell to wall between and interior of said guide tabs.

9. The guide member of claim 1, wherein said guide tabs are disposed along a horizontal portion of the shell second edge and said alignment notches are disposed along a vertical portion of said shell second edge.

10. The guide member of claim 5, wherein said spring arms arms extend from said hollow shell first edge forwardly toward said hollow shell second edge.

11. The guide member of claim 3, wherein said spring arm free end portions extend toward said hollow shell first edge.

12. The guide member of claim 1, wherein said spring arm exerts a pressing force on a connector inserted into said hollow shell.

13. A guide for guiding a plug connector into engagement with a receptacle connector, comprising:
a body including three distinct walls, two side walls and a top wall interconnecting the two side walls together, the three walls cooperatively defining a hollow shell having a general inverted U-shape when mounted to a circuit board, the shell including a press arm extending from a first edge thereof for pressing against a portion of a plug connector inserted into the hollow shell, said shell including first and second alignment members disposed along a second edge of said hollow shell for aligning the plug connector with a receptacle connector when said plug connector is inserted into said hollow shell, the first alignment members including at least one spring arm extending lengthwise and interiorly of said hollow shell for exerting a pressing force on a plug connector inserted into said hollow shell, the second alignment members including a pair of alignment notches located along the shell second edge and spaced apart from each other said alignment notches being disposed along a vertical portion of said shell second edge.

14. The guide of claim 13, further including a pair of spring arms extending from said shell top wall longitudinally within an interior of said hollow shell.

15. The guide of claim 13, further including a pair of spaced apart guide tabs disposed along said shell second edge.

16. The guide of claim 13, further including a pair of guide tabs located along a second edge of said hollow shell, and said spring arms contacting said guide tabs.

17. A guide member for guiding a plug connector into engagement with a receptacle connector, comprising:
a body including three distinct walls, the three walls including two side walls and a top wall interconnecting the two side walls together, the three walls cooperatively defining a hollow shell having a general inverted U-shape for mounting to a circuit board, the hollow shell including opposing first and second edges, said hollow shell further including a press arm disposed along a first edge thereof for pressing against a portion of a plug connector inserted into the hollow shell and which extends past the hollow shell first edge, said hollow shell further including at least one spring arm disposed interiorly of said shell and extending lengthwise between said shell first and second edges, the spring arm exerting a pressing force on a portion of the plug connector inserted into said hollow shell which extends between said hollow shell first and second edges.