Multi-fiber coil and adapter arrangement

Description

TECHNICAL FIELD

[0001] This disclosure relates generally the field of apparatuses for the installation of optical access networks. In particular, this disclosure relates to a reel and adapter assembly that is configured to breakout a plurality of fibers from a multi-fiber cable to a plurality of single fiber cables and to distribute the plurality of single fiber cables to multiple different locations.BACKGROUND

[0002] As demand for data and connectivity increases, network planners and installers are seeking more efficient and cost-effective deployment options for their fiber to the X (FTTX) rollouts. FTTX comprises the many variants of fiber optic access infrastructure. These include fiber to the home (FTTH), fiber to the premise (FTTP), fiber to the building (FTTB), fiber to the node (FTTN), and fiber to the curb or cabinet (FTTC). The optical FTTP or FTTH network is an optical access network that supplies broadband or ultra-broadband communication services to a number of end users (e.g., services that require data transmission speeds measuring several hundred Mbit / s or even higher).

[0003] An optical FTTP or FTTH network typically includes a fiber distribution hub (FDH), which is typically located in the basement or vault of a multi-dwelling unit building in which the end users reside. A multi-fiber distribution cable typically leads out of the distribution hub to a fiber connection point that is typically located remote from the distribution hub. At the distribution hub, the distribution cable can be connected optically to one or more drop cables. As used herein, a "drop cable" is an optical fiber cable that typically runs towards an apartment or office of an end user. To connect the distribution cable to the drop cables, a number of optical fibers are broken out of the distribution cable and into a same number of single-fiber cables that are each terminated with an optical fiber connector. Each drop cable is then typically terminated in a termination box located in the proximity of or inside an apartment or office of an end user. A building may include a single FDH for the entire building, or one FDH per floor, or any combination in between, depending on the fiber connection needs and capacity of the building.

[0004] When installing an FDH, it is difficult for a technician to determine the length of input fiber cable needed to connect the FDH to a fiber connection point, which is usually outdoors where the connections to the larger fiber networks (e.g., a city wide fiber network) are made. In some installations, the fiber connection point could also be within the same building, perhaps on another floor or in the basement of the building. Regardless of the location of the fiber connection point, it is typically necessary to physically locate the FDH before the required length of input fiber cable between the FDT and the fiber connection point is known. As a result, the technician needs to approximate the length of input fiber cable to the fiber connection point and prepare that length of the input fiber cable before installing the FDH.

[0005] If the approximated length is too short, the technician must then splice the approximated length of input fiber cable with another length of input fiber cable. On the other hand, if the approximated length is too long, the excess slack of the input fiber cable must be stored somewhere along the length of fiber cable. If not properly stored, unwanted bends and thus unwanted bend loss can be introduced into the fiber cable path.

[0006] Although it is convenient for a technician to secure the FDH to its permanent location before connecting the input fiber cable to the fiber connection point, conventional FDHs include an adapter plate mounted to the spool of fiber cable such that the adapter plate will rotate with the spool when the input fiber cable is deployed from the spool to the fiber connection point. Thus, although the terminated breakout cables can be connected to the adapter plate before the input fiber cable is deployed from the spool to the fiber connection point, the drop cables that run from the FDH to an apartment or office of an end user cannot be connected until after the input fiber cable is deployed from the spool to the fiber connection point because the adapter plate rotates with the spool and would damage the drop cables.

[0007] Therefore, it may be desirable to provide a multi-fiber reel and adapter assembly that permits a technician to connect drop cables to the adapters in advance of the multi-fiber cable being deployed or paid out from the reel to a remote fiber connection of a FTTX application and keep the drop cables connected to the adapters while the reel is being rotated to deploy or pay out the multi-fiber cable to the remote fiber connection. It may also be desirable to provide a multi-fiber reel and adapter assembly that includes a reel that holds the multiple connectors of breakout cables that are broken out from the multi-fiber cable while the reel is being rotated to deploy or pay out the multi-fiber cable to the remote fiber connection.

[0008] US 20170285286 A1 shows an assembly comprising a housing, a spool rotatably coupled within the cavity of the housing, prongs receiving optical cable ends, and a module releasably coupled to the housing with an adapter to optically couple the fiber optic cable to another fiber optic cable.SUMMARY

[0009] A multi-fiber reel and adapter assembly according to the invention is disclosed din any one of claims 1-11.

[0010] Use of an assembly according to the invention is disclosed in claim 12.BRIEF DESCRIPTION OF THE FIGURES

[0011] For a further understanding of the invention, reference will be made to the following detailed description of the invention which is to be read in connection with the accompanying drawing and in which like numbers refer to like parts, wherein: FIG. 1 is a first perspective view of an exemplary reel and adapter assembly for a multi-fiber cable in accordance with various aspects of the disclosure; FIG. 2 is a second perspective view of the reel and adapter assembly of FIG. 1; FIG. 3 is a third perspective view of the reel and adapter assembly of FIG. 1 with a locking member in a locked position; FIG. 4 is a fourth perspective view of the reel and adapter assembly and the locking member of FIG. 3; FIG. 5 is a top view of the reel and adapter assembly and the locking member of FIG. 3; FIG. 6 is an enlarged perspective view of a header of the reel and adapter assembly of FIG. 1; and FIG. 7 is an enlarged perspective view of the header of FIG. 6 without cables. DETAILED DESCRIPTION

[0012] As a preface to the detailed description, it should be noted that, as used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents, unless the context clearly dictates otherwise.

[0013] FIGS. 1-5 illustrate an exemplary reel and adapter assembly 100 for a multi-fiber cable in accordance with various aspects of the disclosure. As shown in the embodiment of FIGS. 1-5, the reel and adapter assembly 100 includes a base 102, an adapter plate 120, and a cable reel 130. The base 102 includes a back wall 104 and four side walls 106, 108, 110, 112. The back wall 104 and the four side walls 106, 108, 110, 112 define an interior 114, which is configured to receive the cable reel 130. A bearing mount 116 extends from the back wall 104 into the interior 114 and is configured to rotatably receive the cable reel 130. It should be appreciated that, in some aspects, the base 102 can be closed by a door or panel (not shown) if it is desired to prevent access to the interior 114 of the base 102 and / or if it is desired to shield the interior 114 of the base 102 from the environment (e.g., dust, moisture, etc.).

[0014] In the embodiment of FIGS 1-5, the first wall 106 defines the adapter plate 120. The adapter plate 120 includes a plurality of adapters 122 that are each configured to couple a pair of fiber optic connectors. In the embodiment shown in the figures, the adapters 122 are configured to couple SC connectors. However, in various aspects, the adapters 122 may be configured to couple any fiber optic connector, including but not limited to ST, LC, MU, and MPO connectors. The first wall 106 also includes an opening 124 configured to receive a cable such as, for example, a multi-fiber cable 190. Each adapter 122 includes a first end 126 configured to receive a connector 192 of one of the breakout cables 196 (described in more detail below) broken out from the multi-fiber cable 190 and a second end 128 configured to receive a connector of a drop cable (not shown) that runs from the adapter plate 120 towards an apartment or office of an end user.

[0015] The reel 130 includes a hub portion 132 having a radially inner surface 134, an outer rim portion 136, and a pair of reel flanges 138, 139 extending radially outward from the outer rim portion 136. The radially inner surface 134 is sized such that the reel 130 can be rotatably mounted to the bearing mount 116 so as to rotate about an axis X that extends through the bearing mount 116. That is, the diameter of the radially inner surface 134 is greater than the outer diameter of the bearing mount 116 by an amount that permits the reel 130 to rotate relative to the bearing mount 116. In some aspects, the radially inner surface 134 can be substantially the same as the outer diameter of the bearing mount 116.

[0016] The outer rim portion 136 defines an outer circumferential surface 140 about which the cable 190 can be wound. The reel flanges 138, 139 prevent the cable 190 from sliding off the outer rim portion 136 in the axial direction of the reel 130. The reel flanges 138, 139 include one or more openings 142 through which the cable 190 can pass from a space between the reel flanges 138, 139 to a space outside of the reel flanges 138, 139 in the axial direction of the reel 130, as illustrated in FIGS. 1-5.

[0017] As illustrated, the reel flange 139 is adjacent the back wall 104, and the reel flange 138 is spaced from the reel flange 139 and the back wall 104 in the interior 114 of the assembly 100. A latching member 105 may be configured to selectively limit rotation of the reel 130 relative to the back wall 104. For example, the latching member 105 may be integral with the back wall 104 and / or one of the side walls, for example, side wall 108. That is, the latching member 105 may be monolithically constructed with the back wall 104 and / or the side wall 108, or the latching member 105 may be constructed separately from the back wall 104 and the side wall 108 and then fixedly coupled with the back wall 104 and / or the side wall 108. The latching member 105 may be configured to selectively extend through one of the openings 142 of the reel flange 139 to restrict rotation of the reel 130 relative to the latching member 105, back wall 104, and side wall 108 to the arcuate length of the opening 142.

[0018] A header portion 144 extends from an outer surface 146 of the reel flange 138 that faces away from the back wall 104. In some aspects, the header portion 144 extends substantially perpendicular to the reel flange 138 in a direction parallel to the axial direction of the reel 130. It should be appreciated that the header portion 144 can be an integral monolithic structure with the reel flange 138 in some embodiments. In other embodiments, the header portion 144 can be removably attached to the reel flange 138. For example, as shown in the drawings, in an exemplary embodiment, the reel flange 138 can include a mount portion 148 configured to receive the header portion 144. The header portion 144 can be fixedly attached to the mount portion 148 by any conventional attachment mechanism, including but not limited to a friction fit, a snap fit, a fastener, etc.

[0019] Referring now to FIGS. 6 and 7, an exemplary embodiment of the header portion 144 is shown in detail. The header portion 144 includes a plate portion 150 and a plurality of pairs of fingers 152 that extend from the plate portion 150 in a direction away from the surface 146 of the reel flange 138. Each pair of fingers 152 is configured to receive and hold a connector 192, for example, a fiber optic connector such as the SC connectors shown in the drawings. For example, in the illustrated exemplary embodiment, each pair of fingers 152 and is structured and arranged such that the fingers can bend or deflect away from one another when receiving a portion, for example, a boot portion, of the connector 192. That is, the pairs of fingers 152 may be resilient fingers.

[0020] As shown, the fingers of each pair of fingers 152 are curved in opposite directions such that some regions of the pair of fingers 152 are closer to one another than other regions. As a result, when the connector 192 is received by the pair of fingers 152, the fingers 152 are urged away from one another when the connector 192 passes through the closer regions and then return toward their original configurations after the connector 192 passes through the closer regions and is disposed in a more spaced apart region. As also illustrated, the plate portion 150 of the header portion 144 includes a U-shaped cutout region 154 in the direction perpendicular to the reel flange 138, with the pairs of fingers 152 extending from a base 156 of the cutout region 154 into an opening 155 of the cutout region 154.

[0021] As shown in FIGS. 1-6, the cable 190 is a multi-fiber cable that is wound onto the reel 130. A first end 194 of the cable 190 is arranged on the reel 130 so that the first end 194 can be deployed or paid out from the reel 130 to a remote fiber connection of a FTTX application. In the illustrated exemplary embodiment, the multi-fiber cable 190 includes six fibers, and the six fibers are broken out from a second end of the cable 190 into six single-fiber breakout cables 196, as would be understood by persons of ordinary skill in the art. The multi-fiber cable 190 extends from a space between the reel flanges 138, 139 through one of the openings 142 and to a space outside of the reel flange 138 where the fibers of the cable 190 are broken out into the six single-fiber breakout cables 196. A length 198 of the cable 190 is disposed in the space outside the reel flange 138 to provide slack for connecting the breakout cables 196 to the adapters 122 of the adapter plate 120. The slack length 198 of the cable 190 is retained on the outer surface 146 of the reel flange 138 by a plurality of retaining members 158 that extend from the outer surface 146 of the reel flange 138 in a direction away from the back wall 104. The plurality of retaining members 158 define a slack storage path along which the slack length 198 can be wound and prevent the slack length 198 from unwinding in a radially outward direction from the reel flange 138. The breakout cables 196 each have a length that enables the connectors 192 that terminate the breakout cables 196 to be received by the pairs of fingers 152.

[0022] In use, the reel 130 is mounted on the bearing mount 116 and includes the wound multi-fiber cable 190, the slack length 198 of the cable 190 in the space outside of the reel flange 138, and the connectors 192 of the breakout cables 196 securely received by the fingers 152 of the header portion 144. A technician can then pay out the multi-fiber cable 190 from the reel 130 by grasping the first end 194 of the cable 190, passing the first end 194 through the opening 124 in the first wall 106, and deploying the first end 194 of the cable 190 to a desired remote fiber connection of a FTTX application. The reel 130 rotates relative to the adapter plate 120 since the adapter plate 120 is fixed to the base 102. As a result, the reel and adapter assembly 100 permits a technician to connect drop cables from the adapter plate 120 to an apartment or office of an end user in advance of the multi-fiber cable 190 being deployed or paid out from the reel to a remote fiber connection of a FTTX application. Because the reel 130 rotates while the adapter plate remains stationary, the technician can keep the drop cables connected to the adapters 122 while the reel 130 is being rotated to deploy or pay out the multi-fiber cable 190 to the remote fiber connection. Meanwhile, the reel 130 holds the multiple connectors 192 of breakout cables 196 that are broken out from the multi-fiber cable 190 while the reel 130 is being rotated to deploy or pay out the multi-fiber cable 190 to the remote fiber connection.

[0023] It should be understood that, although the illustrated embodiment includes a multi-fiber cable 190 having six fibers and six breakout cables 196, the multi-fiber cable 190 can include any number of fibers and breakout cables such as, for example, 12, 24, etc. In other embodiments, the assembly 100 can include multiple fiber connectors held together, rather than individually, such that the multiple fiber connectors can be removed and plugged in simultaneously.

Claims

1. A multi-fiber reel and adapter assembly (100) comprising: a base (102) including a back wall (104) and a side wall (106, 108, 109, 112) that are configured to define an interior (114); a cable reel (130) mounted to the base (102), the cable reel (130) being configured to be received in the interior of the base (102), wherein a bearing mount (116) extends from the back wall (104) into the interior (114) and is configured to rotatably receive a hub portion (132) of the cable reel (130); a plurality of adapters (122) fixedly mounted to the base (102), wherein the side wall (106, 108, 109, 112) includes the plurality of adapters (122) and an opening (124) configured to receive a distribution cable (190) that includes a fiber optic cable; wherein the cable reel (130) is configured to rotate relative to the base (102) and the adapters (122), and wherein the cable reel (130) comprises: an outer rim portion (136) radially outward relative to the hub portion (132), the outer rim portion being configured to receive the distribution cable (190) wound thereon, and a pair of reel flanges (138, 139) configured to extend radially outward from the outer rim portion (136), at least one (138) of the reel flanges including an opening (142) through which the distribution cable (190) passes from a space between the reel flanges (138, 139) to a space outside of the reel flanges, wherein one of the reel flanges (138) includes a header portion (144) which extends from an outer surface of the one reel flange (138) that faces away from the back wall, the header portion being configured to rotate with the cable reel relative to the base, and wherein the header portion (144) includes at least one pair of fingers (152) that extend in a direction away from the outer surface of the one reel flange, the pair of fingers (152) being configured to receive and hold the fiber optic cable such that the fiber optic cable is configured to rotate with the cable reel relative to the base: and wherein each of the adapters (122) is configured to couple the fiber optic cable (196) from the cable reel (130) with a fiber optic drop cable that is configured to run from the respective adapter (122) to a location of an end user that is remote from the assembly.

2. The multi-fiber reel and adapter assembly of claim 1, wherein the distribution cable (190) is a multi-fiber cable, and the fiber optic cable (196) is a breakout cable of the distribution cable (190).

3. The multi-fiber reel and adapter assembly of claim 1, wherein a length (198) of the distribution cable (190) is configured to be retained on the outer surface of the one reel flange (138) by a plurality of retaining members (158) that extend from the outer surface of the one reel flange (138) in a direction away from the back wall.

4. The multi-fiber reel and adapter assembly of claim 1, wherein the one reel flange (138) includes a mount portion (148) configured to receive the header portion (144).

5. The multi-fiber reel and adapter assembly of any one of claims 1-4, wherein the distribution cable (190) is wound onto the reel, and a first end of the distribution cable is configured to be paid out from the reel (130) to a fiber connection located remotely from the assembly.

6. The multi-fiber reel and adapter assembly of any one of claims 1-5, wherein each of the plurality of adapters (122) is configured to couple a first fiber optic connector (192) terminating the fiber optic cable (196) with a second fiber optic connector terminating the drop cable, optionally wherein the first fiber optic connector and the second fiber optic connector are SC connectors, ST connectors, LC connectors, MU connectors, or MPO connectors.

7. The multi-fiber reel and adapter assembly according to claims 2 and 6, wherein a first end of the distribution cable (190), opposite to the breakout cable, is configured to be paid out from the cable reel (130) to a fiber connection located remotely from the assembly, wherein the cable reel (130) is configured to rotate relative to the base and the adapters (122) while the fiber optic drop cables are coupled with the respective adapters.

8. The multi-fiber reel and adapter assembly of claim 1, wherein the header portion (144) includes a plate portion (150) and a plurality of pairs of fingers (152) that extend from the plate portion (150) in a direction away from the surface (146) of the reel flange (138), wherein each pair of fingers (152) is configured to receive and hold a fiber optic connector (192).

9. The multi-fiber reel and adapter assembly of claim 8, wherein each pair of fingers (152) is structured and arranged such that the fingers can bend or deflect away from one another when receiving a portion, optionally a boot portion, of the fiber optic connector (192).

10. The multi-fiber reel and adapter assembly of claim 9, wherein the fingers of each pair of fingers (152) are curved in opposite directions such that some regions of the pair of fingers (152) are closer to one another than other regions.

11. The multi-fiber reel and adapter assembly of claim 8 or 9 or 10, wherein the plate portion (150) of the header portion (144) includes a U-shaped cutout region (154) in the direction perpendicular to the reel flange (138), with the pairs of fingers (152) extending from a base (156) of the cutout region (154) into an opening (155) of the cutout region (154).

12. Use of the multi-fiber reel and adapter assembly of claim 2, wherein the drop cables are kept connected to the adapters (122) while the cable reel (130) is being rotated to deploy or pay out the multi-fiber cable (190) to the remote fiber connection, the cable reel (130) meanwhile holding multiple fiber optic connectors (192) of breakout cables that are broken out from the multi-fiber cable (190) while the cable reel (130) is being rotated to deploy or pay out the multi-fiber cable (190) to a remote fiber connection.