Demand for bandwidth by enterprises and individual consumers continues to experience exponential growth. To meet this demand efficiently and economically, data centers have to achieve ultra-high density cabling with low loss budgets. Fiber optics have become the standard cabling medium used by data centers to meet the growing needs for data volume and transmission speeds. Many installations, such as transmission towers or relay sites, however require electrical connections as well as power receivers and transmitters, for example. Signal towers may often be located at remote distances from telecommunication switching equipment and power connections, requiring that both signal conductors and power conductors be run between the signal tower and switching equipment.
Fiber optic connectors are provided for connecting optical fibers for transmitting light signals for data transmission, while electrical connectors are provided for connecting electrical conductors to power any electrically operated equipment. While data transmission may still be done with electrical conductors, with an increase in the number of broadband wireless installations, more fiber optic cables have been installed for transmitting data signals between signal towers and switching equipment. Electrical data conducting lines are typically run separately from power lines to minimize EMF interference and shielding constraints. Optical fibers of such systems have also typically been installed separately from electric power conductors, such that separate fiber optic connectors and electric power connectors were provided for connecting optical fibers and for connecting electric power conductors, respectively.
Hybrid connectors having both optical fiber and electrical connectors included in a single connector eliminate the need for providing two separate connectors. Electric wires and fiber optic cables may be run together in a single cable, and the ends of the cable may be terminated with a single hybrid connector that is configured to be coupled with an adapter to connect the optical transmission paths of the optical cable to other fiber optic cables or devices, and simultaneously connect the electrical wires to other electrical wires or devices. An adapter generally includes a housing, or portion of a housing, having at least one port which is configured to receive and hold a connector to facilitate the optical and/or electrical connection of one connector to another connector or other device. Adapters may be used to facilitate connections contained within a chassis. The term “chassis” as used herein broadly refers to a containment structure for housing electrical components or switching components.
In external applications wherein the adapters and connectors may be exposed to weather, particularly rain or moisture in general, the connectors may be configured as ingress protection (IP) connectors that are waterproof. A standard for such connectors may be an OVDA connector. While each of the various types of optical fiber connectors is different in construction, in order to minimize tooling and manufacturing costs, while also minimizing inventory (the number/variety of parts on hand), there is a need for a connector system having a single adapter and a single connector housing component that is mateable with the adapter, wherein the connector housing is configured to receive any of a plurality of different connector types (fiber optic and/or electrical) therein for mating of the Connectors with other connectors.
A connector system may include an adapter and a connector that is configured to be removably attachable with the adapter. The connector may be configured to receive any of a variety of clip-in attachments that may include different types of fiber optic connectors and/or electrical connectors capable of transmitting power, thereby providing a modular system. In various embodiments, the clip-in attachments may include, but are not limited to: only fiber optic connectors, such as, but not limited to, LC, SC, MPO connectors; electrical connectors, such as, but not limited to, RJ45 connectors, electrical socket connectors, power cabling, or electrical pin-type connectors; or hybrid connectors that include any of the listed fiber optic connectors and electrical pin-type connectors together in a single clip-in attachment.
According to one aspect, there is provided a connector system comprising a housing and a fiber optic connector clip insert removably coupled to the housing, and wherein the insert is removably coupled to a plurality of connectors including at least one of an optical fiber connector and an electrical connector. In some embodiments, the insert may be a clip. This connector clip assembly may include a flexible wing configured to engage a recessed opening of connector housing so as to couple the connector clip assembly to connector housing. The flexible latch may be a wedge shaped. In some embodiments, an interior surface of the connector housing may be keyed to match a corresponding surface of the connector clip assembly so as to allow coupling of the insert to the housing in a single orientation. The clip further includes a cover used to secure the fiber optic connectors and electrical cabling to the removably attached insert. The clip housing may be one piece securing the top and bottom cabling, or one piece surrounding a proximal end of the clip assembly. The clip assembly further comprises a snap-in that secures to a corresponding receiving surface on the assembly.
In some embodiments, the connector clip assembly may include a plurality of channels configured to receive a plurality of fiber optic connectors. Each of the plurality of channels may include a respective catch configured to engage a recess in a sidewall of a respective one of the plurality of connectors. In some embodiments, the connector clip assembly may include a respective tab configured to engage lead-in of a respective one of the plurality of connectors. Alternatively, the channel may just receive a distal end of the fiber optic connector, and the standard latch portion of the connector engages a corresponding recess, in an adapter, that depresses the connector latch. In various embodiments, the plurality of connectors may be a plurality of LC connectors or a plurality of SC connectors. In some embodiments, the connector clip assembly may include a plurality of connector clip inserts configured to hold at least one optical fiber connector. In some embodiments, at least one optical fiber connector may be an MPO connector.
According to some embodiments, the connector clip insert may be a hybrid clip and the plurality of connectors may include at least one optical fiber connector and at least one electrical connector. At least one optical fiber connector may be an LC connector, an SC connector, or an MPO connector. At least one electrical connector may be a pin contact, an electrical socket or an RJ45 connector. The hybrid clip may include a protective sheath disposed around one or more electrical connectors. The hybrid connector clip insert may be configured so as to hold at least one optical fiber connector and at least one electrical connector in a stacked arrangement. In some embodiments, the hybrid connector clip insert may include a bottom clip portion configured to hold at least one electrical connector, and a top clip portion disposed against the bottom clip portion so as to clamp at least one optical fiber connector therebetween.
In some embodiments, the housing may be configured to removably couple to any one of a plurality of different types of connector clip inserts. The plurality of different types of connector clip inserts may include a first connector clip insert and a second connector clip insert. The first connector clip insert may be a hybrid connector clip insert coupled to both an optical fiber connector and an electrical connector. The second connector clip insert may be coupled only to at least one optical fiber connector. The plurality of different types of connector clip inserts may further include a third connector clip insert coupled only to at least one electrical connector. In various embodiments, the connector housing may be configured to accommodate any number of different types of connector clip inserts.
According to some embodiments, the connector system may further comprise a coupling nut disposed around the housing. The connector system may comprise an adapter coupled to the housing by the coupling nut. The connector system may further comprise a coupling nut lock ring. In various embodiments, the housing may comprise a front portion and a rear portion. The rear portion of the housing may be threaded for receiving a cable strain relief member.
Various embodiments of connector systems disclosed herein may be ingress protected connector systems. Such systems may further comprise at least one weather proofing seal.
According to some embodiments, a connector system may comprise a housing, an insert removably coupled to the housing, and at least one connector removably coupled to the insert, the at least one connector including at least one of an optical fiber connector and an electrical connector. A connector may be an LC connector, an SC connector, an MPO connector, an electrical pin, an electrical socket, or an RJ45 connector.
According to another aspect, a connector system may comprise a housing configured to couple to any one of a plurality of different connector clip assembly, and at least one connector clip assembly configured to removably couple to the housing. Each one of the connector clip assembly clips may include at least one connector configured to removably couple to a connector clip insert coupled to the connector clip assembly, and the connectors may be optical fiber connectors and/or electrical connectors. In various embodiments, a fiber optic connector may be an LC connector, an SC connector, an MPO connector, an electrical pin, an electrical socket, or an RJ45 connector.
According to another aspect, a connector clip assembly may comprise a housing a with a pair or lead-ins. The lead-ins extend from a proximal end of the connector housing. The lead-ins extend beyond a proximal end of a ferrule to protect the ferrule from damage when the hybrid IP assembly is connected to a corresponding panel or inserted into an adapter portion without a line of site when mating.
According to another aspect, a connector system may comprise a housing with a pair of lead-ins, the lead-ins are of similar radius but of differing lengths. Each lead-in can only engage its corresponding recess on an inside receiving port of an adapter, thus requiring a blind mating of the connector to the adapter. The different shape between the lead-ins or plural of lead-ins ensures the hybrid assembly is inserted and align so the fiber optic connectors have proper polarity (e.g. Tx, Rx) and power has the correct source and return.
The invention is described with a proximal end closer to the fiber optic and power connections that are connected to a panel or enclosure and a distal end closer to a cable gland. Various features disclosed in conjunction with some embodiments may apply to other embodiments.
As used herein, the term “optical fiber” is intended to apply to all types of single mode and multi-mode light waveguides, including one or more bare optical fibers, coated optical fibers, loose-tube optical fibers, tight-buffered optical fibers, ribbonized optical fibers, bend performance optical fibers, bend insensitive optical fibers, nanostructured optical fibers or any other expedient for transmitting light signals. A multi-fiber optic cable includes a plurality of the optical fibers. Such cables have a variety of names depending on their particular usage, and may be considered as “trunk cables” or “trunks” when connected to fiber optic modules used to tom connections to jumper cables using a select polarity.
For connection of cables together or with other fiber optic devices, the terminal ends of a cable may include a connector. A connector may include a housing structure configured to interact with and connect with an adapter. An adapter, in a simple form, may include two aligned ports for aligning fiber optic connectors and/or electrical connectors therein to align and connect optical fibers end-to-end, or allow for pin/socket electrical connections. For weatherproof or waterproof installations, the connectors may include protective housings and seals to inhibit water penetration. Such connectors may be named IP connectors, or Ingress Protection connectors, and may include different levels of ‘ingress protection’ depending on the environment to which they will be exposed. While the general discussion herein is directed to IP connecters, the invention is not meant to be limited to such and may also be applied to other types of connectors as well.
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Various parts, components or configurations described with respect to any one embodiment above may also be adapted to any others of the embodiments provided. Various embodiments including LC connectors as described above may be configured with SC connectors, and various embodiments including SC connectors as described above may also be configured with LC connectors.
This disclosure is not limited to the particular systems, devices and methods described, as these may vary. The terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope.
In the above detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.
Various of the above-disclosed and other features and functions, or alternatives thereof, may be combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art, each of which is also intended to be encompassed by the disclosed embodiments.
This application claims priority to U.S. Patent Application 62/651,679 filed Apr. 4, 2018, entitled “Hybrid Ingress Protected Connector and Adapter Assembly”, which is fully incorporated herein by reference.
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