The subject matter herein relates generally to latch assemblies for connector systems.
Connector systems typically include electrical connectors and mating electrical connectors configured to be mated with corresponding electrical connectors. In some applications, the electrical connectors are part of a backplane and the mating electrical connectors are part of a daughtercard. The electrical connectors are coupled to the backplane and positioned for mating with the mating electrical connectors. The electrical connectors need to be mounted to the backplane.
Current retention methods include designs with screws that secure the electrical connectors to the backplane. Such retention methods require tools to assemble and unassembled, which is time consuming. Also, problems with foreign objects and/or debris introduced prior to or during assembly cause problems in assembly. Also, loosening of the screws due to vibration is another potential problem.
A need remains for a mechanism to retain an electrical connector to a surface in such a way to create a simple interface. A need remains for a tool-less means of attaching electrical connectors to a backplane.
In one embodiment, a connector system is provided including a base mount configured to hold a connector module therein and a slider latch received in the base mount and movable in a longitudinal direction. The slider latch has a profiled groove configured to latchably receive a cam of the connector module. A faceplate is coupled to the base mount. The faceplate has an opening providing access to the slider latch. The base mount is configured to receive the connector module through the opening in the faceplate. An ejector button is operatively coupled to the slider latch to move the slider latch from a latched position to an unlatched position. The slider latch is configured to eject the connector module as the slider latch moves between the latched and unlatched positions. A spring engages the slider latch and acts on the slider latch in a biasing direction. The spring forces the slider latch to return to the latched position after the ejector button is released.
In another embodiment, a connector system is provided having a backplane having a connector channel therethrough and a connector module received in the connector channel for mating with a mating connector module. The connector module has a profiled cam. A latch assembly releasable couples the connector module to the backplane. The latch assembly includes a base mount configured to hold a connector module therein and a slider latch received in the base mount and movable in a longitudinal direction. The slider latch has a profiled groove configured to latchably receive a cam of the connector module. A faceplate is coupled to the base mount. The faceplate has an opening providing access to the slider latch. The base mount is configured to receive the connector module through the opening in the faceplate. An ejector button is operatively coupled to the slider latch to move the slider latch from a latched position to an unlatched position. The slider latch is configured to eject the connector module as the slider latch moves between the latched and unlatched positions. A spring engages the slider latch and acts on the slider latch in a biasing direction. The spring forces the slider latch to return to the latched position after the ejector button is released.
In an exemplary embodiment, the backplane 102 includes both board mounted electrical connectors and cable mounted electrical connectors, both generally designated by reference 104. A single daughter card may have mating electrical connectors that are electrically connected to and mated with corresponding board mounted electrical connectors and cable mounted cable connectors. The cable mounted electrical connectors 104 are part of connector modules 106 that are coupled to the backplane 102. The backplane 102 includes channels 108 through which the connector modules 106 partially extend.
The backplane 102 includes a plurality of openings 110. The openings 110 may be used to mount components to the backplane 102. For example, latch assemblies 120 (shown in
Metal shells 112 may be coupled to a front surface 114 of the backplane 102. The metal shells 112 may protect the electrical connectors 104. The metal shells 112 may provide a structure for mating the mating electrical connectors and/or the daughter cards to the backplane 102. The metal shells 112 may be coupled to the backplane 102 using fasteners that extend into and/or through the openings 110.
The electrical connectors 104 may be any type of connectors. The electrical connectors 104 may include a plurality of contacts or terminals that are configured to be mated to corresponding contacts or terminals of the mating electrical connectors. The contacts or terminals may be terminated directly to the circuit board of the backplane 102, such as by surface mounting or through hole mounting to the backplane 102. Alternatively, the contacts or terminals may be terminated to ends of wires of the cables of the cable mounted electrical connectors. The contacts of terminals may be any types of contacts or terminals, such as pins, sockets, blades, tuning forks, plugs, receptacles, and the like. The electrical connectors may be fiber optic connectors in alternative embodiments.
The connector module 106 includes mounting lugs 136 extending from opposite sides 138, 140 of the back shell 130. The mounting lugs 136 are used to mount the connector module 106 to the latch assembly 120 (shown in
The connector module 106 includes cams 150 extending from a top 152 and a bottom 154 of the back shell 130. The cams 150 interact with the latch assemblies 120 to secure the connectors modules 106 within the latch assemblies 120.
The base mount 160 includes a base 172 and sidewalls 174, 176 extending from the base 172. A pocket 178 is defined by the base 172 and side walls 174, 176. The pocket 178 may be open general opposite the base 172. In an exemplary embodiment, the base mount 160 includes post mounts 180 in the pocket 178 extending from the base 172. Guide posts 182 are configured to be mounted to the post mounts 180. The guide posts 182 guide mating of the connector module 106 (shown in
The slider latch 122 includes side walls 184, 186 and end walls 188, 190. The sidewalls 184, 186 extend longitudinally along the longitudinal axis 170. The springs 168 are configured to engage the end walls 188, 190 and impart a biasing force on the slider latch 122 against the end walls 188, 190. The side walls 184, 186 include profiled grooves 192 that are configured to receive corresponding cams 150 (shown in
The face plate 164 is a planar structure configured to be coupled to the base mount 160 over the slider latch 122. The face plate 164 includes an opening therethrough that provides access to the pocket 178 and the slider latch 122. The connector module 106 is configured to be loaded into the latch assembly 120 through the opening 194. The face plate 164 includes post openings 196 aligned to receive the guide post 182. In an exemplary embodiment, the face plate 164 may be coupled to the base mount 160 using fasteners. Other fastening means may be used in alternative embodiments to couple the face plate 164 to the base mount 160.
The face plate 164 includes cutouts 198 in the opening 194. The cutouts 198 are configured to receive corresponding cams 150 therethrough as the connector module 106 is loaded into the base mount 160. The cutouts 198 are aligned with corresponding profiled grooves 192 to receive the cams 150. Optionally, the cutouts 198 may be aligned across the opening 194. Alternatively, the cutouts 198 may be offset. Having the cutouts 198 offset may provide a feature for polarizing the mating of the connector module 106 with the latch assembly 120. For example, the cutouts 198 may be positioned such that the connector module 106 may be loaded into the latch assembly 120 in only one way. For example, cutouts 198 on one side of the opening 194 may have a first spacing therebetween and cutouts 198 on the other side of the opening 194 may have a second spacing therebetween different from the first spacing. The cams 150 on one side may correspond to the first spacing and the cams 150 on the other side may correspond to the second spacing such that the connector module 106 may only be loaded into the opening 194 in one way.
The guide posts 182 are coupled to the post mounts 180 and extend from the faceplate 164 to interact with the connector module 106 during mating of the connector module 106 with the latch assembly 120. In an exemplary embodiment, the guide posts 182 have flat sides 200 that interact with the flat surfaces 144 of the post holes 142 (both shown in
The ejector button 166 has an actuation end 202 that is configured to be located outside of the base mount 160 to be pressed by an operator to release the slider latch 122 to eject the connector module 106 from the latch assembly 120. The ejector button 166 has a head 204 opposite the actuation end 202 that is captured in the pocket 178. The ejector button 166 may be pressed in the direction along the longitudinal axis 170 to move the slider latch 122 between a latched position and an unlatched position, the latched and unlatched positions may correspond to unactuated and actuated positions of the ejector button 166. Actuation of the slider latch 122 ejects the connector module 106 from the latch assembly 120.
The connector module 106 is shown coupled to the latch assembly 120. The connector module 106 is loaded into the latch assembly 120 such that a portion of the connector module 106 extends through the latch assembly 120 into the backplane 102. The connector module 106 is loaded through the channels 108 in the backplane 102. The electrical connectors 104 are presented at the backplane 102 for mating with the electrical connectors of the daughter card. The guide posts 182 are coupled to the mounting lugs 136. For example, the guide posts 182 extend through the post holes 142 and the mounting lugs 136. The guide post 182 position the connector module 136 with respect to the base mount 160 and the backplane 102. The guide posts 182 align the electrical connectors 104 with the channel 108 and the backplane 102.
In an exemplary embodiment, the cam 150 includes a first inclined surface 232, a second inclined surface 234, and third inclined surface 236 and a fourth inclined surface 238. The cam 150 may include other inclined surfaces in addition to the incline surfaces 232-238. The inclined surfaces 232-238 are configured to engage different portions of the profiled grove 192 as the slider latch 122 is moved between the latched position and the unlatched position.
The profiled grove 192 includes a plurality of inclined surfaces that are configured to guide the cam 150 into and out of the pocket 178. In an exemplary embodiment, the connector module 106 and cam 150 move linearly along a plug/unplug axis 240 while the slider latch 122 moves linearly along the longitudinal axis 170. During plugging of the connector module 106 into the latch assembly 120, the cam 150 drives the slider latch 122 along the longitudinal axis 170. To remove the connector module 106, the slider latch 122 is moved along the longitudinal axis 170 to drive the cam out of the pocket 178.
In the illustrated embodiment, the profiled groove 192 includes a first inclined surface 242, a second inclined surface 244, and third inclined surface 246, and a fourth inclined surface 248. During plugging of the connector module 106 into the latch assembly 120 and during ejection of the connector module 106 from the latch assembly 120, the first inclined surface 232 of the cam is configured to interact with the first inclined surface 242 of the profiled grove 192. Similarly, the second inclined surface 234 interacts with the second inclined surface 244, the third inclined surface 236 interacts with the third inclined surface 246 and the fourth inclined surface 238 interacts with the fourth inclined surface 248. The first inclined surfaces 232, 242 have similar angles. Similarly, the second inclined surfaces 234, 244 have similar angles; the third inclined surfaces 236, 246 have similar angles; and the fourth inclined surfaces 238, 248 have similar angles.
During mating of the connector module 106 with the latch assembly 120, the cams 150 are loaded through the cutouts 198 until the cams 150 engage the slider latch 122. The first inclined surface 232 engages the first inclined surface 242. The cams 150 slide along the profiled grooves 192. The cams 150 drive the slider latch 122 to a clearance position at which the cams 150 clear the blocker 220. The cams 150 are then loaded into a latching area 250 of the corresponding profiled grooves 192. The latching area 250 is located under the blocker 220. The latching area 250 is defined, at least in part by the second inclined surface 244 of the profiled groove 192. In an exemplary embodiment, the second inclined surface 244 has a slight angle 252 with respect to the longitudinal axis 170, such as approximately 10°. The angle 252 of the second inclined surface 244 helps draw the connector module 106 into the latch assembly 120. For example, the second inclined surface 244 forces the cam 150 downward as the slider latch 122 is driven to the latched or resting position (e.g. to the right in the view shown in
During ejection, the ejector button 166 is pressed, which drives the slider latch 122 from the latched or resting position to an unlatched position. As the slider latch 122 is moved in the actuation direction (e.g. to the left in the view shown in
Once the ejector button 166 is released, the slider latch 122 is forced in a closing direction by the springs 168. As the slider latch 122 is moved from the unlatched position toward the latched or resting position, the blocker 220 engages the cam 150. The blocker 220 is positioned inward of the holding area 254 to ensure that the cam 150 does not move back into the latching area 250, but rather is moved into an ejection area 256 and ultimately is ejected out of the pocket 178. The first inclined surface 242 engages the first inclined surface 232. The blocker 220 forces the cam 150 outward and fully ejects the cam from the pocket 178. As such, the ejection is a two stage ejection process. The first stage is accomplished with moving the slider latch 122 from the latched or resting position to the unlatched position by pressing the ejector button 166. The second stage is accomplished by releasing the ejector button 166 and having the springs 168 force the slider latch 122 to move from the unlatched position to the latched position.
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, sixth paragraph, unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
This application claims the benefit of U.S. Provisional Application No. 61/661,207 filed Jun. 18, 2012 titled LATCH ASSEMBLIES FOR CONNECTOR SYSTEMS, the subject matter of which is herein incorporated by reference in its entirety.
Number | Date | Country | |
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61661207 | Jun 2012 | US |