• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
      OPTICAL CONNECTOR AND METHOD FOR ASSEMBLING THE SAMEAn optical connector 1A to which an optical fiber strand including an optical fiber strip and a sheath must be attached includes: an adapter element 6 which holds a plurality of embedded fibers 14 which must be fused to a plurality of fibers respectively optics constituting the fiber optic tape; a fusion bond protection sleeve 16 to protect the fused bond portion; housings 7 to 8 to house the adapter element 6 and the fusion union protection sleeve 16, housings 7 and 8 having; at the rear end, a recess for receiving a forked portion of the liner; and a fixing element 9 for fixing the liner to the housings 7 and 8 by retaining it.
    公开号:BR112013003470A2
    申请号:R112013003470-0
    申请日:2012-01-10
    公开日:2020-10-27
    发明作者:Seiji Shitama；Yoshikyo Tamekuni；Yukihiro Yokomachi；Yoshio Ukita；Motoyoshi Kimura
    申请人:Sei Optifrontier Co., Ltd.；Sumitomo Electric Industries, Ltd；
    IPC主号:
    专利说明:

    BR “OPTICAL CONNECTOR AND METHOD FOR ASSEMBLING THE SAME”
    BACKGROUND OF THE INVENTION - Field of the Invention The present invention relates to an optical connector to which a fiber optic strand including a fiber optic ribbon must be attached, and also to a method of attaching an optical fiber strand to the connector optical. Description of the Prior Art The publication of Japanese patent application no. 2010-224195 describes an optical connector to which a fiber optic cord is attached in such a way that a bonding reinforcement part and an adapter are provided in an optical connector housing, where the bonding reinforcement part is a part reinforced with a reinforcement sleeve in a portion joined by fusion of embedded optical fibers, which are inserted in and fixed to the adapter, and a plurality of optical fibers included in the optical fiber cord and exposed in an extreme portion of the fiber cord optics. With the aforementioned conventional technique, when the optical fiber strand is pulled tightly, the optical fiber strand could be detached from the optical connector. because the lining of the fiber optic cord is not attached to the optical connector. If any structure to fix the lining of the fiber optic cord is provided, it would increase the size of the optical connector, and consequently a high density arrangement of a plurality of optical optic connectors having a fiber optic cord would become difficult. In the case of the conventional technique mentioned above, a reinforcement in the shape of a rod is incorporated into the reinforcement sleeve. The provision of a rod-shaped reinforcement could only cause the reinforcement sleeve to warp when the reinforcement sleeve is subjected to heat shrinkage. However, the provision of a plurality of reinforcements in the form of “hastenaluvade reinforcement” would increase the size of a reinforcement sleeve. In a male-type optical connector, which has guide pins, of the conventional technique mentioned above, a pin holder to prevent a guide pin from sliding out is formed at the rear of an adapter body in such a way that a guide pin from the pin clamp is penetrated through a guide pin hole in the adapter body. On the other hand, the pin holder is unnecessary with respect to a female type optical connector that has no guide pins. However, there are cases where a spacer equivalent to a pin fastener is provided so that coordination with the operating characteristics of an optical male connector can be achieved. Since such a spacer is a miniscule part, it is difficult to perform positioning of the adapter and spacer body, which would result in degradation of work capacity in mounting the optical connector. Summary of the invention The purpose of the present invention is to provide an optical connector that allows
    . coating a fiber optic strand without increasing the connector size, and a method of attaching an optical fiber strand to the optical connector. . For this purpose, the invention provides an optical connector to which a strand of optical fibers including a fiber optic strip and a coating must be attached, the fiber optic strip containing a plurality of optical fibers, and the coating covering the strip optical fibers, and comprising: (1) an adapter element that retains a plurality of embedded fibers that must be fused together respectively to the plurality of optical fibers; (2) a fusion bond protection sleeve to protect the fusion bonded portion of the optical fibers and the embedded fibers, (3) a housing to accommodate the adapter element and the fusion bond protection sleeve, the housing having, at the rear end, a recess for receiving a torn portion of the liner; and (4) a fixing element for fixing the coating to the housing by retention, the fixing element being fixed to the rear portion of the housing.
    The bonding protective sleeve may have a reinforcing metal plate extending in the longitudinal direction of the bonding protective sleeve. The adapter element may have an adapter body and a spacer, the adapter body having a pair of guide holes into which a guide pin is inserted, and the spacer being arranged at the rear of the adapter body and having a pair of projections respectively to be inserted in each guide hole.
    Another embodiment of the present invention is a method of attaching an optical fiber strand to an optical connector, the optical fiber strand having a coating and an optical fiber strip containing a plurality of optical fibers. The method comprising steps of (1) tearing the coating on an extreme portion of an optical fiber strand in order to expose an optical fiber tape; (2) attach a protective glove to the fiber optic cable; (3) fusingly joining a plurality of optical fibers respectively with embedded fibers retained in an adapter element; (4) protect the joined portion by fusing the optical fibers and the incorporated fibers by a union protection glove; (5) place the adapter element and the union protection sleeve in a housing; (6) placing the torn portion of the cover over a recess that exists in an extreme part of the housing - trouser; and (7) fixing the liner to the housing by fixing an element and fixing to the rear portion of the housing in order to fix the liner.
    According to the present invention, it is possible to attach, without increasing the size of an optical connector, the coating of an optical fiber strand to the optical connector. This allows for high density arrangement of a plurality of optical connectors having a fiber optic cable.
    Brief description of the drawings The region (A) of figure 1 is a perspective view showing a state in which
    . a fiber optic cord is attached to a male type MPO connector, which is an optical connector mode of the present invention, and region (b) is a perspective view. showing a state in which a fiber optic cord is attached to the female type MPO connector, which is an embodiment of the optical connector of the present invention. Figure 2 is a detailed perspective view of the male type MPO connector shown in region (a) of figure 1. The regions (a) and (b) of figure 3 are seen in section of the male type MPO connector shown in region (a) of figure 1; region (b) is a sectional view taken along line B-B- of region (a) of figure 3. Figure 4 is a perspective view of a protective union sleeve included in an optical connector of the present invention.
    Figure 5 is a perspective view of a front housing included in an optical connector of the present invention.
    Figure 6 is a perspective view of a rear housing included in the connector of the present invention. The regions (a) to (c) of figure 7 are conceptual diagrams showing how the covering of a fiber optic cord is fixed in a rear housing by the fixing element included in the optical connector of the present invention. . Figure 8 is a detailed perspective view of the female type MPO connector shown in region (b) of figure 1.
    The regions (a) and (b) of figure 9 are seen in section of the female type MPO connector shown in region (b) of figure 1; region (b) is a sectional view taken along line B-B of region (a) in figure 9.
    Figure 10 is a perspective view showing a spacer included in a female type MPO connector.
    Detailed description of the invention In the following, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, an identical mark represents the same element and the repetition of explanation is omitted. Dimensional ratios in drawings are not always exact.
    The region (a) of figure 1 is a perspective view showing a state in which a fiber optic cord 2 is attached to a male type MPO connector 1A which is an embodiment of the present invention (an optical connector having an optical cord ), and region (b) is a perspective view similarly showing a state in which a strand of “fiberoptics2” is attached to a female type 1B MPO connector. Optical connectors 1h and 1B are loosely coupled together via an optical adapter (not shown).
    . Figure 2 is a detailed perspective view of a plug type MPO connector 1A. In figure 3, regions (a) and (b) show section views of the MPO connector of the male type 1A, while region (b) is a section view taken along the BB line of region (a) . The fiber optic cord 2 attached to the optical connector 1A comprises: an optical fiber fit 3 formed by disposing a plurality of optical fibers 3a; a coating 4 covering the fiber optic tape 3; and a plurality of traction fibers (aramid fibers) 5 which are arranged between the optical fiber strip 3 and the sheath 4. The optical connector 1A includes an adapter element 6, a front housing 7, a rear housing 8 , a fastener 9 and a case 10.
    Adapter element 6 consists of an adapter body of type MT 11 and a pin guard means 12 disposed at the rear of the adapter body 11. Adapter body 11 has a pair of guide holes and a plurality of holes fiber arranged between each pair of guide holes. Each fiber hole contains each of the embedded fibers of short length 14 that must be joined by fusing with each optical fiber 3a of the optical fiber tape 3. The pin guard means 12 retains a pair of guide pins 15 that penetrate , respectively in each guide hole.
    The front housing 7 is a component for accommodating the adapter element 6 'and a part of the coupling protection sleeve 16. A coupling 20 for pulling out the. optical connector 1A from an optical adapter (not shown) is attached to the front housing7 in a mode in which it can move in a forward and backward direction from the front housing 7. Front housing 7 is connected to the rear housing 8 The rear housing 8 collaborates with the front housing 7 in accommodating a bonding protective sleeve 16. The bonding protective sleeve 16 reinforces the respective merged portion S of the optical fibers 3a of the optical fiber tape 3 and the fibers 14 are retained in the adapter body 6. An adapter spring 27 is disposed between the adapter element 6 and the rear housing 8 so as to push the adapter element 6 towards the front side of the front housing 7.
    Figure 4 is a perspective view of a union protection sleeve 16 included in optical connectors 1A and 1B. The joint protection sleeve 16 has a heat shrinkable tube 17 having an ellipse-shaped cross section and a thermoplastic tube 18 having an ellipse-shaped cross section and disposed in the heat shrinkable tube 17. A reinforcing metal plate 19 extending in a longitudinal direction of the coupling protection sleeve 16 is arranged between the heat shrinkable tube 17 and the thermoplastic tube 18. Metal plate 19 is a thin plate made of SUS 304 stainless steel, for example. The joint protection sleeve 16 is approximately 27 mm in length, for example, and the dimensions of the metal plate 19 are 0.2 to 0.3 mm in thickness, 3.7 mm in width and 26 mm in length, for example.
    . Figure 5 is a perspective view of a front housing 7 included in optical connectors 1A and 1B. Spring accommodation slots 21 are formed on both sides. of the front housing 7. An ejector spring 22 for pushing a housing 20 towards the front side of the front housing 7 is arranged in the spring accommodation slot 21. Double-opening windows 23 are formed at the rear respectively on the top and bottom sides of the front housing 7.
    Figure 6 is a perspective view of a rear housing 8 included in optical connectors 1A and 1B. Hitch protrusions 24 for engaging the hitch windows 23 of the front housing 7 respectively are formed at the front on the upper and lower surfaces of the rear housing 8. The cross section of the rear end portion of the rear housing 8 is substantially at ellipse shape. In a rear end part of the rear housing 8, a recess 25 for receiving the torn portion (see figure 2) of the lining 4 of the fiber optic cord 2 is formed on the upper and lower surfaces, which correspond to the locations of the respective hitch protrusions
    24. With respect to recess 25, it is preferable that the rear housing 8 is machined so that the total thickness corresponding to the portion of the recess 25 can be uniform.
    . A male screw part 26 is formed, in a region between the engagement protuberance 24 and the recess 25, around the outer circumference of the rear housing 8.. A fixing element 9 is fixed by screwing it to the rear housing 8. The fixing element 9 is a cylindrical element for fixing the coating 4 and tensile fiber 5 of the fiber optic cord 2 to the rear housing 8 by retention. A female screw part 28 is formed around the inner circumference of the front side portion of the fastening element 9 so as to engage with the male screw part 26 of the rear housing 8.
    A case 10, which is provided in a rear portion of the fastener 9 - helps to protect the fiber optic cord 2 so that severe flexing is not applied to the fiber optic cord 2. A reinforcement tube 29 is previously attached to the case
    10. The regions (a) to (c) of figure 7 show a conceptual diagram illustrating how the covering of a fiber optic cord is attached to the rear housing 8 by the fastening element 9 included in the optical connectors 1A and 1B. To attach the cladding 4 and the traction fiber 5 (not shown) of the optical fiber cord 2 to the rear housing 8 by the fixing element 9, first tear off a tip portion of the cladding 4 of the optical fiber cord 2 so that it can be forked (region (a)). Next, place this forked portion of the liner 4 in each recess 25 of the housing 8 (region (b)). Subsequently, pull out the traction fiber 5 of the fiber optic cord 2 from a gap in the forked portion of the liner 4 and place the traction fiber 5 in the male screw part 26 of the rear housing 8, and in this state, push the fixing element
    . tion 9 on the rear housing 8 (region (c)). In this way, the liner 4 and the traction fiber 5 are fixed in a state in which they are trapped between the rear housing 8 and the ele-. fixing device 9. In the following, a method of fixing the fiber optic cord 2 to the optical connector 1 which is constituted as mentioned above will be described. First, remove the coating 4 around the tip portion of the fiber optic cord 2 so that an optical fiber tape 3 and a tensile fiber 5 can be exposed. Subsequently, tear off the tip portion of the liner 4 so as to fork it. Attach the bonding protection sleeve 16 to the fiber optic cord 2 in advance by inserting the fiber optic cord 2 into the bonding protection sleeve 16. Next, expose the optical fibers 3a by removing the cover from the fiber optic tape 3, and cut the tip portion of the respective optical fibers 3 a. Subsequently, by using fusion joining equipment (not shown), one per fusion each optical fiber 3a of the optical fiber tape 3 and each incorporated fiber 14 retained by the adapter element 6. In such a case, it is desirable to fuse the fibers incorporated 14 and the optical fibers 3a under the conditions in which a dust cap tied by rope (not shown) is placed on the adapter body 11. 'Subsequently, move the union protection sleeve 16 so that the portion . fused together S of the incorporated fibers 14 and optical fibers 3a can be located in a longitudinally central part of the union protection sleeve 16, and under such conditions, perform heat shrinkage of the union protection sleeve 16. In this case, the portion fusion bonded S will be fully protected by the union protection sleeve 16, since the metal plate 19 is contained in the union protection sleeve 16. Place the adapter element 6 in the front housing 7 in a state in which optical fibers 2 is connected to adapter element 6. Subsequently, attach the rear housing 8 to the front housing 7 in a state in which the rear housing 8 and the fixing element 9 having a case 10 cover the union protection sleeve
    16. Next, fix the fastening element 9 to the rear housing 8, and in this way make the rear housing 8 and the fastening element 9 secure the cover 4 and the traction fiber5 of the fiber optic cord 2. According with the above-mentioned steps, optical connector 1A having a fiber optic strand 2 is completed. The fixing of the liner 4 and the tensile fiber 5 of the fiber optic cord 2 by the rear housing 8 and the fixing element 9 prevent the coating 4 (fiber optic cord 2) from rotating around the longitudinal geometric axis in relation to the adapter element 6 even if the cover-4 cannot necessarily be fixed at the end. Figure 8 is a detailed perspective view of a female type MPO connector 1B, and the regions (a) and region (b) of figure 9 respectively show a view in
    . 1B female type MPO optical connector section. The region (b) of figure 9 is a sectional view taken along the line B-B in the region (a) of figure 9. Optical connector 1B comprises. it holds an adapter element 30, a front housing 7, a rear housing 8, a fastening element 9 and a case 10.
    In the optical connector of the female type 16, no guide pin is provided, and therefore it is unnecessary to provide such a pin guard means 12 as it is formed in the adapter body 6 of the optical connector of the male type 1A. However, instead of the pin guard means 12, a spacer 13 is provided in the adapter body 11 of the female type optical connector 1B to make the pressure force of the adapter spring 27 uniform with respect to the connector optical type 1A male and optical type 1B female connector.
    Figure 10 is a perspective view showing spacer 31. Spacer 31 has a pair of pin-like protrusions 32 to be inserted into the respective guide holes 13 of the adapter body 11. The pin-like protrusions 32 have a section substantially circular cross-section in which four protruding parts 32, which project slightly outward, are formed at equal intervals. The pin-like protuberances 32 are formed in such a way that the root portion is thicker than the tip portion, with an inclination of approximately 0.5 degrees towards the tip from the root. The insertion of the pin-like protuberances: 32 in the guide holes 13 of the adapter body 11 makes it easy to position the spacer 31 in relation to the adapter body 11. As a result, it is possible to improve the performance of field assembly work for the optical connectors 1A and 1B. The spacer structure 31 can be applied to other types of multi-core connectors such as those using only one ribbon fiber (ribbon).
    The other structural composition of the optical connector 18 and the procedure for attaching a fiber-optic cord2 to the optical connector 1B are the same as in the case of the optical connector 1A described above.
    As described above, with the optical connector according to the modality of the present invention, it is possible to fix the coating 4 easily and safely in the field without increasing the external dimensions of the fastening element 9, since two recesses 25 for receiving the bifurcated portions of the lining 4 of the fiber optic cord 2 are formed at the rear end of the rear housing 8 and the fastening element 9 is placed in the rear housing 8 by screwing in a state in which the forked portions of the lining 4 are placed for positioning in the recesses 25. Consequently, in a case of organizing a plurality of optical connectors 1A and 1B having a strand of optical fibers 2 winged side in a given space, for example, it is possible to organize the optical connectors 1A and 1B with high density in a vertical direction.
    The recess number 25 provided in the rear housing 8 for receiving the liner
    . Part 4 is not necessarily two in particular, but it is desirable that recess 25 is provided at least in a part having a smaller curvature (part corresponding to the upper surface and the lower surface of figure 6) in an extreme rear portion of the rear housing 8 (the cross section of the rear end portion is substantially in the shape of an ellipse), since the metal plate 19 for reinforcement was provided in the union protection sleeve 16, it is possible to fully brake the union protection sleeve 16 from flexing when shrinking the heat of the union protection glove 16 is carried out, and after the heat shrinkage of the union protection glove 16 is carried out, the fusion-bonded portion S is protected - the union protection sleeve 16. Here, it could be considered to use instead of metal plate 19, a glass-based ceramic plate as a reinforcement element for the joint protection sleeve; however, to ensure resistance in such a case, it would be inevitable to increase the thickness of the glass-based ceramic plate, leading to an increase in the size of the protective joint glove 16, and consequently leading to an increase in the size of the housing. Using a metal plate as a reinforcement element makes it possible to ensure the resistance of the joint protection sleeve without increasing the size.
    With the optical connector according to the modality of the present invention, for using a metal plate instead of a glass-based ceramic plate for a. metal 19, the strength can be ensured even if the metal plate 19 is made somewhat thinner, and therefore the increase in the size of the joining protection sleeve 16 can be suppressed, and therefore the increase in size optical connectors 1A and 1B can be suppressed as a whole. The joint protection sleeve 16 can be applied not only to one type of cord but also to other types of multi-core connectors, such as those using a fiber tape (tape) only.
    The present invention is not limited to the above mentioned modalities. For example, in the aforementioned embodiment, the male screw part 26 is formed around the outer circumference of the rear housing 8 and the female screw part 28 is formed on the inner circumference of the fastener 9; however, the means for securing the fastening element 9 to the rear housing 8 is not necessarily such a screw retainer. In addition, the optical connectors 1A and 1B according to the above mentioned modality are field mounted type MPO connectors; however, the present invention can be applied to factory-mounted type MPO connectors and other single-core or multi-core connectors, etc.
    Citation list Patent literature Patent literature 1: publication of Japanese patent application no. 2010-
    224195.
    权利要求:
    Claims (5)
    [1]
    1. Optical connector to which a fiber optic cord including an optical fiber ribbon and a coating is attached, the optical fiber ribbon containing a plurality of optical fibers, and the coating covering the optical fiber ribbon, FEATURED by the factor includes: an adapter element that retains a plurality of embedded fibers to be fused together respectively to the plurality of optical fibers; a fusion union protection sleeve to protect the fusion joined portion of the optical fibers and the incorporated fibers, a housing to accommodate the adapter element and the fusion union protective sleeve, the housing having a male screw part in around the outer circumference and having, at the rear end, a recess for receiving a torn portion of the liner; and a fixing element for fixing the liner to the housing by retaining the liner between the housing and the fixing element, the fixing element having a female screw part around the inner circumference in order to engage with the male screw part and being fixed to the rear portion of the housing.
    [2]
    2. Optical connector, according to claim 1, CHARACTERIZED by the fact that the union protection sleeve has a reinforcing metal plate extending in the longitudinal direction of the union protection sleeve.
    [3]
    3. Optical connector, according to claim 1 or claim 2, CHARACTERIZED by the fact that the adapter element has an adapter body and a spacer, the adapter body having a pair of guide holes in which a guide pin is inserted, and the spacer is arranged on the rear side of the adapter body and has a pair of projections respectively to be inserted into each guide hole.
    [4]
    4. Optical connector, according to claim 1, CHARACTERIZED by the fact that the cross section of the extreme rear portion of the housing is an ellipse that expands in a wide direction of the fiber optic tape, and the recess is provided on one side having a smaller curvature of the ellipse.
    [5]
    5. Method of fixing a fiber optic cord in an optical connector, the fiber optic cord having a coating and a fiber optic tape containing a plurality of optical fibers, the method being CHARACTERIZED by the fact that it comprises the steps of: exposing the fiber optic tape on an extreme portion of the fiber optic strand through the thin coating; attach a protective union glove to the fiber optic cord; merge the plurality of optical fibers respectively with incorporated fibers
    those retained in an adapter element;
    protect the joined portion by fusing the optical fibers and the fibers incorporated by the union protection glove;
    place the adapter element and the coupling protection sleeve in a housing;
    placing a torn portion of the liner over a recess that exists at the rear end of the housing; and fixing the liner to the housing by fixing an element and fixing to the rear portion of the housing in order to fix the liner.
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    法律状态:
    2020-11-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-10| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: G02B 6/40 Ipc: G02B 6/38 (2006.01), G02B 6/255 (2006.01) |
    2021-12-07| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2022-03-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011005999A|JP5759183B2|2011-01-14|2011-01-14|Optical connector and assembly method thereof|
    JP2011-005999|2011-01-14|
    PCT/JP2012/050229|WO2012096246A1|2011-01-14|2012-01-10|Optical connector and method for assembling same|
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