Abstract:
The invention provides a connector boot having an integral latch release for engaging an operative portion of a latching mechanism of a connector to switch the latching mechanism between a latched position and an unlatched position. In one embodiment, the boot includes a housing having exterior walls that define an internal cavity sized to accept a portion of the connector. The boot includes a latch release cowl that is integrally formed on one of the exterior walls of the housing. The release cowl comprises side walls and an outer wall that joins the side walls to form the cowl. Slots are formed in each of the side walls so as to form a cantilevered beam in a portion of the outer wall. Thus, when the connector is positioned within the internal cavity of the boot, the cantilevered beam of the release cowl is positioned in operative relation over the latching mechanism of the connector.

Description:
FIELD OF THE INVENTION 
     The present invention generally relates to electrical connectors, and more particularly to devices adapted for the actuation of locking latches. 
     Background of the Invention 
     Electrical connectors typically have a multiplicity of terminal contacts positioned in an insulating housing, and arranged so as to be connected to a complementary connector to form a connector pair. It is well known to use mechanical latching mechanisms for maintaining the connection between the two connectors. The latching mechanism will ensure that the mating connectors maintain an electrical connection. Typically, the connector includes an integral latch member which is secured to the housing by a leg or biased hinge, or a connection point with the housing of the connector. The mating connector has a catch or a lug which will engage the latch mechanism when the two connectors are interengaged thereby ensuring that the connectors remain secured together. Examples of connectors utilizing such devices may be found in U.S. Pat. Nos.: 6,089,898; 6,071,141; 5,947,776; 5,941,726; 5,785,540; 5,725,324; 5,399,109; 5,255,154; 5,207,593; 4,995,826; 4,647,128; and 4,272,145. 
     These arrangements are not always satisfactory, especially when they are used in conjunction with multiple, but separate connectors that are positioned side-by-side. There is a need in the art for connectors that can be released from one another when latching mechanism is located in a remote position, or in an arrangement with other connector pairs that provides little or no space for actuation. This need in the art has become acute in connection with many “high density” interconnection systems, where unlatching must take place under difficult circumstances, e.g., in a blind space where several such connectors are arranged in a stacked configuration. 
     SUMMARY OF THE INVENTION 
     The present invention provides a connector boot having an integral latch release for engaging an operative portion of a latching mechanism of a connector to switch the latching mechanism between a latched position and an unlatched position. In one embodiment, the boot includes a housing having exterior walls that define an internal cavity sized to accept a portion of the connector. The boot includes a latch release cowl that is integrally formed on one of the exterior walls of the housing. The release cowl comprises side walls and an outer wall that joins the side walls to form the cowl. Slots are formed in each of the side walls so as to form a cantilevered beam in a portion of the outer wall. Thus, when the connector is positioned within the internal cavity of the boot, the cantilevered beam of the release cowl is positioned in operative relation over the latching mechanism of the connector. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     These and other features and advantages of the present invention will be more fully disclosed in, or rendered obvious by, the following detailed description of the preferred embodiments of the invention, which are to be considered together with the accompanying drawings wherein like numbers refer to like parts and further wherein: 
     FIG. 1 is a perspective view of a connector boot having an integral latch release formed according to the invention, and assembled to an electrical connector including a terminated cable; 
     FIG. 2 is a perspective view of the connector boot having an integral latch release, as shown in FIG. 1 but with the electrical connector and cable removed for clarity of illustration; 
     FIG. 3 is a rear perspective view of the connector boot having an integral latch release shown in FIG. 2; 
     FIG. 4 is a side elevational view of the connector boot having an integral latch release formed according to the invention, and assembled to an electrical connector including a terminated cable as shown in FIG. 1; and 
     FIG. 5 is a perspective view of the connector boot having an integral latch assembled to an electrical connector including a terminated cable as shown in FIG. 1, but with a finger actuating the latch release. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     This description of preferred embodiments is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description of this invention. In the description, relative terms such as “horizontal,” “vertical,” “up,” “down,” “top” and “bottom” as well as derivatives thereof (e.g., “horizontally,” “downwardly” “upwardly,” etc.) should be construed to refer to the orientation as then described or as shown in the drawing figure under discussion. These relative terms are for convenience of description and normally are not intended to require a particular orientation. Terms including “inwardly” versus “outwardly,” “longitudinal” versus “lateral” and the like are to be interpreted relative to one another or relative to an axis of elongation, or an axis or center of rotation, as appropriate. Terms concerning attachments, coupling and the like, such as “connected” and “interconnected,” refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise. The term “operatively connected” is such an attachment, coupling or connection that allows the pertinent structures to operate as intended by virtue of that relationship. 
     FIGS. 1-5 show an electrical connector  5  that is terminated to the end of a cable  7  and supporting a boot  8  having an integral latch release  10  formed in accordance with the present invention. More particularly, electrical connector  5  may comprise any of the well known high density interconnection devices that are known in the art. Connectors of this type typically include a plurality of closely spaced, electrically conductive pin or receptacle contacts (not shown) arranged within an insulative housing  11 , and individually terminated at one end to a corresponding plurality of conductors (not shown) that form the central portion of cable  7 . The electrical interconnection features of the plurality of closely spaced pin or receptacle contacts are positioned adjacent to an interface surface  14  of the connector. 
     Housing  11  of electrical connector  5  is typically formed from one of the well known polymer materials that are suitable for injection molding, e.g., polyhalo-olefins, polyamides, polyolefins, polystyrenes, polyvinyls, polyacrylates, polymethacrylates, polyesters, polydienes, polyoxides, polyamides, polycarbonates, polyterephthalates, and polysulfides and their blends, co-polymers and substituted derivatives thereof. Housing  11  also normally includes a resilient latch  16  having an operative portion positioned on an outer surface, and arranged to releasably engage a corresponding feature on a mating electrical connector (not shown) that may be, e.g., mounted on the edge of a printed wiring board or terminated to the end of another cable, or the like. Latch  16  may comprise various known shapes and include several alternative features that are adapted for releasably engaging a corresponding feature on the mating electrical connector, e.g., recesses, notches, shoulders, catches, or tabs, etc. FIGS. 1 and 4 show a representative latch  16  that includes a catch  24  that is adapted to engage a corresponding recess, or the like (not shown) on a mating connector. 
     Typically, latch  16  will comprise a cantilevered beam that is fixed, via a living hinge  21  or the like. For example, in the embodiments shown in FIGS. 1,  4  and  5 , latch  16  extends rearwardly from interface surface  14  toward cable  7 , and at an acute angle relative to the top surface of housing  11 . In this way, depressing latch  16  toward the top surface of housing  11  stores elastic energy in living hinge  21  so that when released, latch  16  springs away from the top surface of housing  11  and toward its original unloaded position. Of course, the integral latch release of the present invention, and its obvious variations, is not limited in any way to the latch arrangement shown in the figures, but may be advantageously used in connection with many other arrangements of latches and connectors. 
     Terminal end  26  of latch  16  may include various known features that are adapted for aiding in depressing latch  16 , and are arranged so that a finger  27  may depress terminal end  26  to release latch  16  from engagement with the mating connector. For example, when connectors are mated together latch  16  may be depressed, thus disengaging catch  24  from a corresponding recessed portion (not shown) on the mating connector. However, due to the high density requirements placed on such connectors, little or no space is available for the positioning of a person&#39;s finger directly over top of latch  16  so as to depress latch  16  and thereby release connector  5  from its corresponding mating connector, as intended by the design. This situation is often acute in applications that require a plurality of interconnection devices to be engaged to the same device in a closely spaced architecture, e.g., mounted side-by-side and/or in stacked formation. 
     The present invention solves this problem in the art by providing a boot  8  having an integrally formed latch release  10  that is adapted to slip over a rear portion of electrical connector  5  so as to provide an easily accessible means for engaging and depressing latch  16  of electrical connector  5 . More particularly, boot  8  comprises a one-piece molded slip-over cover for the rear portion of electrical connector  5  that includes a housing receptacle  30 , a cable strain relief  32 , and a release cowl  34 . Boot  8  is typically formed from any of the well-known resilient but substantially stiff elastomeric polymer materials that are well known in the art. Such materials will exhibit good structural rigidity and an elastic resiliency that is sufficient to maintain the memory of its shape even after substantial deformation. Housing receptacle  30  comprises side walls  38 , a top wall  40 , and a bottom wall  42  that together define an internal recess  44  shaped so as to be complementary with the outer profile of housing  11  of electrical connector  5 . A housing retention shoulder  48  is formed on an interior surface of bottom wall  42 , with a corresponding mating recess formed in a portion of electrical connector  5 . In this way, a secure engagement between boot  8  and electrical connector  5  may be maintained. 
     Cable strain relief  32  extends from the rear portion of housing receptacle  30 , and comprises an inner passageway  50  that is sized and shaped so as to be complementary with the outer profile of cable  7 . A wall  52  encloses passageway  50 , and may includes a plurality of recesses  54  throughout its length. Recesses  54  provide for side-to-side bending of cable  7  when cable  7  is positioned within passageway  50 , without placing high bending loads on either housing  11  of electrical connector  5  or the portion of housing  11  that structurally supports cable  7 . 
     Release cowl  34  projects from an outer surface of housing receptacle  30 , and includes side walls  60 , 61  and a radiused outer wall  63  that forms a portion of a latch engagement beam  66 . More particularly, side walls  60 , 61  project outwardly from top wall  40  in spaced relation to one another, and together with radiused outer wall  63 , define an interior cavity  69  of release cowl  34  that is in open communication with the interior  44  of housing receptacle  30 . A pair of slots  68 , 70  are formed in side walls  60 , 61  respectively, and are positioned in aligned, spaced relation to one another. Each slot  68 , 70  defines a profile that tapers or narrows inwardly to a radiused corner  72 . As a result of this construction, side walls  60 , 61  are partially divided by slots  68 , 70 , and latch engagement beam  66  is substantially cantilevered by a living hinge portion (shown generally at reference numeral  79  in FIG. 5) that is formed through the portion of outer radiused wall  63  and side walls  60 , 61  that are adjacent to radiused corner  72 . It will be understood that the choice of elastomeric material to form boot  8  must be such that it will exhibit good structural rigidity prior to deformation of latch engagement beam  66 , and an elastic resiliency that is sufficient to maintain the memory of the shape of release cowl  34  even after substantial deformation. 
     As a result of this arrangement, when boot  8  is assembled to electrical connector  5 , a portion of terminal end  26  of latch  16  extends into the interior cavity of release cowl  34 , below latch engagement beam  66 . When the outer surface of latch engagement beam  66  is depressed, e.g., by sliding a finger  27  over-top of it and the outer surface of boot  30 , latch engagement beam  66  bends about its living hinge portion  79 , thereby moving latch engagement beam  66  downwardly into contact with terminal end  26  of latch  16  (FIG.  5 ). As this occurs, latch  16  bends toward housing  11  of electrical connector  5  with elastic energy being stored in living hinges  21  and  79 . This action, in turn, tends to bias latch  16  outwardly, away from electrical connector  5 . With latch  16  disposed in this biased state, electrical connector  5  may be pulled from engagement with its mating connector (not shown). Thus the present invention allows for the easy actuation of latch  16  when electrical connector  5  is mated in a high density interconnection architecture, e.g., when mounted either side-by-side, in stacked formation, and/or in any combination with minimal clearance between adjacent connectors or other structures. When finger  27  is lifted from the outer surface of latch engagement beam  66 , it resiliently springs back to its original shape and configuration. 
     It is to be understood that the present invention is by no means limited only to the particular constructions herein disclosed and shown in the drawings, but also comprises any modifications or equivalents within the scope of the claims.