(19)
(11)EP 3 105 625 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
17.06.2020 Bulletin 2020/25

(21)Application number: 15719827.6

(22)Date of filing:  10.02.2015
(51)Int. Cl.: 
G02B 6/38  (2006.01)
(86)International application number:
PCT/IB2015/050980
(87)International publication number:
WO 2015/121791 (20.08.2015 Gazette  2015/33)

(54)

FIBER OPTIC CONNECTOR AND METHOD OF ASSEMBLING THE SAME

FASEROPTISCHER STECKER UND VERFAHREN ZUR MONTAGE DAVON

CONNECTEUR DE FIBRES OPTIQUES ET SON PROCÉDÉ D'ASSEMBLAGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 14.02.2014 CN 201410052557

(43)Date of publication of application:
21.12.2016 Bulletin 2016/51

(73)Proprietor: CommScope Telecommunications (Shanghai) Co. Ltd.
Wai Gao Qiao Free Trade Zone Shanghai (CN)

(72)Inventors:
  • LIU, Lei
    Shanghai (CN)
  • TONG, Zhaoyang
    Shanghai (CN)

(74)Representative: Murgitroyd & Company 
Murgitroyd House 165-169 Scotland Street
Glasgow G5 8PL
Glasgow G5 8PL (GB)


(56)References cited: : 
US-A1- 2003 077 045
US-B1- 6 296 399
US-A1- 2004 117 981
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    CROSS-REFERENCE TO RELATED APPLICATION



    [0001] This application claims the benefit of Chinese Patent Application No. 201410052557.X filed on February 14, 2014 in the State Intellectual Property Office of China.

    BACKGROUND OF THE INVENTION


    Field of the Invention



    [0002] The present invention relates to a fiber optic connector and a method of assembling the fiber optic connector.

    Description of the Related Art



    [0003] In prior art, optical cables/fibers generally are optically coupled by following ways of:

    1) Splicing optical fibers in field



    [0004] The way of splicing the optical cables/fibers generally comprises steps of: Firstly, processing ends of the optical fibers (including peeling off the optical cable, cleaning and cutting the optical fiber of the optical cable); Secondly, manually or automatically setting optimum splicing parameters of a splicing machine and relative positions of the optical fibers to be spliced based on material and type of the optical fiber; Thirdly, discharging an electric arc with the splicing machine to fuse the ends of the optical fibers, and slowly and linearly pushing the optical fibers toward each other to optically couple the optical fibers; Finally, contracting a heat shrinkable tube on a coupled joint of the optical fibers to protect the coupled joint, and winding the optical fibers to finish all splicing operations in the field. In this case, the splicing properties (including optical attenuation, echo, and long term reliability, etc.) of the optical fibers are in different degrees depended on various factors, such as, operation level of a splicing operator, operation steps, fiber winding level, cleanliness of electrodes of the splicing machine, splicing parameters, cleanliness of working environment, and so on. In addition, it is necessary to use various expensive apparatus, for example, high precision cutting tool, splicing machine or the like, to perform the splicing of the optical fibers in the field.

    2) Cold coupling optical fibers



    [0005] In this solution, two processed optical fibers are fixed in a high precision V-shaped or U-shaped groove and aligned to each other. In addition, an optical matching paste is filled in the V-shaped or U-shaped groove to fill a gap between end surfaces of the two optical fibers. Compared with splicing, the cold coupling is relatively simpler and quicker, because the cold coupling does not need an electric power supply and a heat shrinkable tube to protect the spliced joint. However, the cold coupling is largely depended on cutting quality of the end surfaces of the optical fibers and the optical matching paste. If the cutting quality is poor, it decreases the coupling properties (including optical attenuation, echo, and long term reliability, etc.). Furthermore, as for the cold coupling with the V-shaped or U-shaped groove, the coupling loss is increased with the variation of the temperature. With the passage of time, because of the opened V-shaped or U-shaped groove, flowing away, pollution and aging occurring in the optical matching paste may cause the insertion loss to become larger or even reduce the optical signal to zero. Thereby, the cold coupling has a poor stability and long-term reliability.

    3) Assembling connector in field



    [0006] In the way of assembling connector in field, an optical fiber is pre-embedded in a ferrule. At one end of ferrule, an end surface of a standard connector is pre-polished, and at the other end of the ferrule, the pre-embedded fiber is placed in a high precision V-shaped groove with an optical matching paste filled therein. During assembling the connector in the field, the incoming optical fiber/cable is processed in the field (for example, opening the cable, peeling the fiber, cleaning and cutting the fiber), and inserted into the rear end of the connector until the end surface of incoming fiber abuts against the end surface of the pre-embedded fiber in the V-shaped or U-shaped groove, then the fibers are fixed by an external mechanical element. The way of assembling connector in field has a relatively high cost. In addition, it is necessary to use a special tool and an operation guide provided by the connector manufacturer. Also, because the optical matching paste is used, it has a poor stability and long-term reliability.

    4) Integral cable/fiber assembly in factory



    [0007] The integral cable/fiber assembly is manufactured in the factory. As for this way, it is reliable and is easy to use. However, it cannot be applied in a limited space, for example, in an application of fiber to the home or to the resident, it often needs to pull the cable/fiber assembly through a narrow pipe, especially a pipe in which other cables are paved.

    [0008] In the above ways in the prior art, there are high requirements on the tool and the operator to assemble the connector in the field. Furthermore, in the prior art, before assembling a ferrule assembly, a spring and a spring seat into the connector housing, the ferrule assembly, the spring and the spring seat are separated from each other and cannot be pre-assembled together. Thereby, in the prior art, the ferrule assembly, the spring and the spring seat must be assembled into the connector housing one by one. Such way of assembling the connector is only adapted to assemble the ferrule assembly, the spring and the spring seat into the connector housing in the factory, and is not adapted to assemble the ferrule assembly, the spring and the spring seat into the connector housing in the field. As a result, the completely assembled connector in the factory cannot be pulled through the narrow pipe in the field, because the completely assembled connector has a large profile size. US6296399 shows an example of a fiber optic connection system.

    SUMMARY OF THE INVENTION



    [0009] The present invention has been made to overcome or alleviate at least one aspect of the above mentioned disadvantages.

    [0010] According to an object of the present invention, there is provided a fiber optic connector and a method of assembling the fiber optic connector, wherein a ferrule assembly and a crimping seat are adapted to be pre-assembled to an integral cable assembly having a profile size less than that of a connector housing. In this way, the cable assembly with small profile size may be easily pulled through an elongated pipe in the field. Furthermore, after being pulled through the elongated pipe, the cable assembly as a whole may be quickly assembled into the connector housing in the field.

    [0011] According to another object of the present invention, there is provided a fiber optic connector and a method of assembling the fiber optic connector, wherein various components of the connector may be correctly and quickly assembled into the connector housing, effectively saving the assembling time and reducing mistake operations.

    [0012] According to another object of the present invention, there is provided a fiber optic connector and a method of assembling the fiber optic connector, wherein various components of the connector may be pre-assembled to an integral assembly, and an end surface of a ferrule and a fiber are protected to prevent them from damage during assembling the integral assembly into the connector housing, improving the long term reliability of an interconnection of fiber optic connectors.

    [0013] According to an aspect of the present invention, there is provided a fiber optic connector comprising a housing, a spring, a ferrule assembly and a crimping seat. Before being inserted into the housing, the ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. The spring is pre-assembled into the housing before the ferrule assembly is inserted into the housing. After the pre-assembled ferrule assembly and the crimping seat are inserted into the housing, the crimping seat is snap-fitted in the housing, and the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat.

    [0014] According to an exemplary embodiment of the present invention, the ferrule assembly comprises: a ferrule; and a ferrule seat with a front end fixedly connected to the ferrule and a rear end fitted in the crimping seat.

    [0015] According to another exemplary embodiment of the present invention, the ferrule and the ferrule seat are formed into a single piece.

    [0016] According to another exemplary embodiment of the present invention, a slot is formed in an outer circumferential surface of a front end of the ferrule seat, a retaining member is fitted in the slot through the housing after the ferrule seat is inserted into the housing, and the spring pushes the retaining member, so as to exert an axial elastic force on the ferrule assembly.

    [0017] According to another exemplary embodiment of the present invention, a spring holding seat and a spring moving block are provided in the housing, and the spring is compressed between the spring holding seat and the spring moving block; and the spring moving block abuts against the retaining member under the push of the spring.

    [0018] According to another exemplary embodiment of the present invention, a protrusion is formed on a front end portion of the crimping seat, and the protrusion is snapped into a recess formed in the spring holding seat.

    [0019] According to another exemplary embodiment of the present invention, an insertion opening is formed in the housing, and the retaining member is inserted into the slot of the ferrule seat through the insertion opening after the ferrule assembly is inserted into the housing.

    [0020] According to another exemplary embodiment of the present invention, the crimping seat has an insertion chamber defined by a plurality of petal shaped parts, and the rear end of the ferrule seat is inserted into the insertion chamber of the crimping seat.

    [0021] According to another exemplary embodiment of the present invention, the fiber optic connector further comprises: a crimp ring configured to crimp a strengthening element of an optical cable on a rear end of the crimping seat; and a stress relief tube configured to be sleeved on the crimp ring crimped on the rear end of the crimping seat.

    [0022] According to another exemplary embodiment of the present invention, the fiber optic connector further comprises: a dust cap fitted on the front end of the ferrule.

    [0023] According to another exemplary embodiment of the present invention, the optical cable, the dust cap, the ferrule assembly, the spring seat, the crimp ring and the stress relief tube are pre-assembled together to form a cable connection assembly as a whole before being inserted into the housing; the spring, the spring moving block and the spring holding seat are pre-assembled in the housing before the cable connection assembly is inserted into the housing; and the protrusion of the crimping seat is snapped into the recess of the spring holding seat after the cable connection assembly is inserted into the housing, so as to limit the cable connection assembly in the housing.

    [0024] According to another aspect of the present invention, there is provided a method of assembling a fiber optic connector, comprising steps of:

    pre-assembling an optical cable, a dust cap, a ferrule assembly, a crimping seat, a crimp ring and a stress relief tube together to form a cable connection assembly as a whole;

    pre-assembling a spring, a spring moving block and a spring holding seat in a housing of the fiber optic connector before the cable connection assembly is inserted into the housing; and

    inserting the cable connection assembly as a whole into the housing in which the spring, the spring moving block and the spring holding seat have been pre-assembled.



    [0025] The ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. After the cable connection assembly is inserted into the housing, the crimping seat is snapped in the spring holding seat, so as to limit the cable connection assembly in the housing. After the cable connection assembly is inserted into the housing, the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat.

    [0026] According to an exemplary embodiment of the present invention, the above method further comprises a step of: pulling the cable connection assembly through an elongated pipe before inserting the cable connection assembly into the housing.

    [0027] According to another exemplary embodiment of the present invention, the ferrule assembly comprises a ferrule, and a ferrule seat with a front end fixedly connected to the ferrule and a rear end fitted in the crimping seat.

    [0028] According to another exemplary embodiment of the present invention, a slot is formed in an outer circumferential surface of a front end of the ferrule seat, and a retaining member is fitted in the slot after the ferrule seat is inserted into the housing, so as to block the ferrule seat from being moved out of the housing under the push of the spring.

    [0029] According to another exemplary embodiment of the present invention, the spring is compressed between the spring moving block and the spring holding seat; and the spring moving block abuts against the retaining member under the push of the spring.

    [0030] According to another exemplary embodiment of the present invention, a protrusion is formed on a front end portion of the crimping seat, and the protrusion is snapped into a recess formed in the spring holding seat after the crimping seat is inserted into the housing.

    [0031] According to another exemplary embodiment of the present invention, an insertion opening is formed in the housing, and the retaining member is inserted into the slot of the ferrule seat through the insertion opening after the ferrule assembly is inserted into the housing.

    [0032] According to another exemplary embodiment of the present invention, the crimping seat has an insertion chamber defined by a plurality of petal shaped parts, and the rear end of the ferrule seat is inserted into the insertion chamber of the crimping seat.

    [0033] According to another exemplary embodiment of the present invention, the crimp ring is configured to crimp a strengthening element of the optical cable on a rear end of the crimping seat; and the stress relief tube is configured to be sleeved on the crimp ring crimped on the rear end of the crimping seat.

    [0034] In the fiber optic connector and the method of assembling the fiber optic connector according to the above exemplary embodiments of the present invention, before being inserted into a housing of the fiber optic connector, some components, including the ferrule assembly and the crimping seat, of the connector may be pre-assembled together to form an integral assembly having a size less than that of a housing of the fiber optic connector. Accordingly, the integral assembly may be smoothly pulled through a small long pipe. Furthermore, after being pulled through the pipe, the integral assembly may be easily and quickly inserted into the housing as a whole at one time, saving the assembly time, avoiding mistake operations, effectively preventing the warp of the spring, protecting the end surface of the ferrule and the fiber from being damaged during the assembling process, and increasing the long term reliability of the interconnection of the fiber optic connectors.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0035] The above and other features of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which:

    Fig.1 is an illustrative perspective view of a cable connection assembly formed by assembling some components, including a ferrule assembly and a crimping seat, of a fiber optic connector according to an exemplary embodiment of the present invention;

    Fig.2 is an illustrative perspective view of a housing of a fiber optic connector according to an exemplary embodiment of the present invention, wherein a spring is pre-assembled in the housing;

    Fig.3 is an illustrative cross section view of the housing of the fiber optic connector shown in Fig.2;

    Fig.4 is an illustrative view of inserting the cable connection assembly of Fig.1 into the housing in which the spring has been pre-assembled;

    Fig.5 is an illustrative perspective view of a complete fiber optic connector after the cable connection assembly of Fig. 1 is inserted into the housing in which the spring has been pre-assembled; and

    Fig.6 is an illustrative cross section view of the fiber optic connector of Fig.5.


    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE IVENTION



    [0036] Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein the like reference numerals refer to the like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

    [0037] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.

    [0038] According to a general concept of the present invention, there is provided a fiber optic connector comprising a housing, a spring, a ferrule assembly and a crimping seat. Before being inserted into the housing, the ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. The spring is pre-assembled into the housing before the ferrule assembly is inserted into the housing. After the pre-assembled ferrule assembly and crimping seat are inserted into the housing, the crimping seat is snapped in the housing, and the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat.

    [0039] Fig.1 is an illustrative perspective view of a cable connection assembly formed by assembling some components, including a ferrule assembly, a crimping seat, and so on, of a fiber optic connector according to an exemplary embodiment of the present invention.

    [0040] In an exemplary embodiment, as shown in Fig.1, the cable connection assembly 1 mainly comprises a ferrule assembly, a crimping seat 300 and an optical cable 10. In another exemplary embodiment, the cable connection assembly 1 may further comprise a crimp ring 410 (Fig. 6), a stress relief tube 400, and a dust cap 110.

    [0041] Fig.5 is an illustrative perspective view of a complete fiber optic connector after the cable connection assembly 1 of Fig.1 is inserted into the housing in which a spring 500 has been pre-assembled; and Fig.6 is an illustrative cross section view of the fiber optic connector of Fig.5.

    [0042] As shown in Figs.1, 5-6, the ferrule assembly comprises: a ferrule (100); and a ferrule seat (200) with a front end (left end or distal end in the Figs.) fixedly connected to a rear end of the ferrule (100) and a rear end (right end or approximate end in the Figs.) fitted in the crimping seat (300). In an alternative embodiment, the ferrule 100 and the ferrule seat 200 may be formed into a single piece. A fiber of the optical cable 10 is inserted into and fixed in a bore of the ferrule 100. In the illustrated embodiment, the ferrule 100, the ferrule seat 200 and the optical cable 10 may be together regarded as the ferrule assembly.

    [0043] Referring to Figs.1 and 6, the dust cap (indicated by dash line in Fig.1) 110 is fitted on a front end of the ferrule 100, so as to protect the front end surface of the ferrule 100 and a fiber of the optical cable 10 from being damaged during assembling the pre-assembled cable connection assembly 1 into the connector housing.

    [0044] As shown in Figs.1 and 6, the crimping seat 300 has an insertion chamber defined by a plurality of petal shaped parts, and a rear end of the ferrule seat 200 is inserted into the insertion chamber of the crimping seat 300 and movable forward and backward relative to the crimping seat 300 in the insertion chamber of the crimping seat 300.

    [0045] As shown in Figs.1 and 6, the crimp ring 410 is constructed to crimp a strengthening element of the optical cable 10 on a rear end of the crimping seat 300, and the stress relief tube 400 is sleeved on the crimp ring 410 crimped on the rear end of the crimping seat 300.

    [0046] Fig.2 is an illustrative perspective view of housings 800, 900 of a fiber optic connector according to an exemplary embodiment of the present invention, wherein a spring 500 is pre-assembled in the housings 800, 900; Fig.3 is an illustrative cross section view of the housings 800, 900 of the fiber optic connector shown in Fig.2.

    [0047] As shown in Figs.2-3, the fiber optic connector comprises an outer housing 800 and an inner housing 900 adapted to be fitted in the outer housing 800.

    [0048] As shown in Figs.2-3 and 6, a spring holding seat 700 and a spring moving block 600 are provided in the inner housing 900, and the spring 500 is compressed between the spring holding seat 700 and the spring moving block 600.

    [0049] Fig.4 is an illustrative view of inserting the cable connection assembly 1 of Fig.1 into the housings 800, 900 in which the spring 500 has been pre-assembled.

    [0050] As shown in Figs. 1-6, a slot 201 is formed in an outer circumferential surface of a front end of the ferrule seat 200. After the ferrule seat 200 is inserted into the housings 800, 900, a retaining member 910 is fitted in the slot 201 through the outer housing 800. The spring 500 pushes the retaining member 910, so as to exert an axial elastic force on the ferrule assembly.

    [0051] As shown in Fig.6, the spring moving block 600 abuts against the retaining member 910 under the push of the spring 500. In this way, the spring 500 is provided to push the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring 500 relative to the crimping seat 300.

    [0052] As shown in Figs. 1-6, a protrusion 310 is formed on a front end (distal end) portion of the crimping seat 300, and the protrusion 310 is snapped into a recess formed in the spring holding seat 700 after the crimping seat 300 is inserted into the connector housing.

    [0053] As shown in Fig.4, an insertion opening 890 is formed in the outer housing 800 of the fiber optic connector, and the retaining member 910 is inserted into the slot 201 of the ferrule seat 200 through the insertion opening 890 after the cable connection assembly 1 is inserted into the housings 800, 900.

    [0054] In an exemplary embodiment, as shown in Figs. 1-6, the optical cable 10, the dust cap 110, the ferrule assembly, the spring seat 300, the crimp ring 410 and the stress relief tube 400 are pre-assembled together to form a cable connection assembly 1 as a whole before being inserted into the connector housing. The spring 500, the spring moving block 600 and the spring holding seat 700 are pre-assembled in the housing before the cable connection assembly 1 is inserted into the connector housing. The protrusion 310 of the crimping seat 300 is snapped into the recess of the spring holding seat 700 after the cable connection assembly 1 is inserted into the housing, so as to limit the cable connection assembly 1 in the housing. In this way, a complete fiber optic connector is obtained.

    [0055] According to another exemplary embodiment of the present invention, there is also disclosed a method of assembling a fiber optic connector, comprising steps of:

    pre-assembling an optical cable 10, a dust cap 110, a ferrule assembly, a crimping seat 300, a crimp ring 410 and a stress relief tube 400 together to form a cable connection assembly 1 as a whole; and

    pre-assembling a spring 500, a spring moving block 600 and a spring holding seat 700 in a housing of the connector before the cable connection assembly 1 is inserted into the housing; and

    inserting the cable connection assembly 1 as a whole into the housing in which the spring 500, the spring moving block 600 and the spring holding seat 700 have been pre-assembled, then snap-fitting a protrusion 310 of the crimping seat 300 into a recess of the spring holding seat 700 after the cable connection assembly 1 being inserted into the housing, so as to limit the cable connection assembly 1 in the housing.



    [0056] In the above method, the ferrule assembly is pre-assembled into the crimping seat 300 in a manner of being movable relative to the crimping seat 300, as shown in Fig.1.

    [0057] In the above method, after the cable connection assembly 1 is inserted into the housing, as shown in Fig.6, the crimping seat 300 is snap-fitted in the spring holding seat 700, so as to limit the cable connection assembly 1 in the housing.

    [0058] In the above method, after the cable connection assembly 1 is inserted into the housing, as shown in Fig.6, the spring 500 pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring 500 relative to the crimping seat 300.

    [0059] In an exemplary embodiment, the above method further comprises a step of: pulling the cable connection assembly 1 through an elongated pipe before inserting the cable connection assembly 1 into the connector housing.

    [0060] Although the housing, in the illustrated embodiment, comprises the outer housing 800 and the inner housing 900 fitted in the outer housing 800, the present invention is not limited to this, the housing may comprise a single housing.

    [0061] In the fiber optic connector and the method of assembling the fiber optic connector according to the above exemplary embodiments of the present invention, before being inserted into the connector housing, some components, including the ferrule assembly and the crimping seat, of the connector may be pre-assembled together to form an integral assembly having a size less than that of the housings of the fiber optic connector. Accordingly, the integral assembly with small size may be smoothly pulled through a small long pipe. Furthermore, after being pulled through the pipe, the integral assembly may be easily and quickly inserted into the housing as a whole at one time, saving the assembly time, avoiding mistake operations, effectively preventing the warp of the spring, protecting the end surface of the ferrule and the fiber from being damaged during the assembling process, and increasing the long term reliability of the interconnection of the fiber optic connectors.

    [0062] It should be appreciated for those skilled in this art that the above embodiments are intended to be illustrated, and not restrictive. For example, many modifications may be made to the above embodiments by those skilled in this art, and various features described in different embodiments may be freely combined with each other without conflicting in configuration or principle.

    [0063] Although several exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that various changes or modifications may be made in these embodiments without departing from the principles of the disclosure, the scope of which is defined in the claims and their equivalents.

    [0064] As used herein, an element recited in the singular and proceeded with the word "a" or "an" should be understood as not excluding plural of said elements or steps, unless such exclusion is explicitly stated. Furthermore, references to "one embodiment" of the present invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Moreover, unless explicitly stated to the contrary, embodiments "comprising" or "having" an element or a plurality of elements having a particular property may include additional such elements not having that property.


    Claims

    1. A fiber optic connector comprising a housing, a spring (500), a ferrule assembly and a crimping seat (300), comprising:

    a first pre-assembly adapted to be inserted in a second pre-assembly,

    the first pre-assembly comprising the ferrule assembly and the crimping seat (300) in which the ferrule assembly is adapted to be pre-assembled into the crimping seat (300) such that the ferrule assembly is movable relative to the crimping seat (300),the second pre-assembly comprising the housing and the spring (500), such that the spring (500) is adapted to be pre-assembled into the housing, and

    wherein the first pre-assembly is adapted to be inserted in the second pre-assembly such that the crimping seat (300) is provided to be adapted for snap-fitting in the housing, the spring (500) is provided to push the ferrule assembly, and the ferrule assembly is mounted to be movable against the spring (500) relative to the crimping seat (300).


     
    2. The fiber optic connector according to claim 1, wherein the ferrule assembly comprising:

    a ferrule (100); and

    a ferrule seat (200) with a front end fixedly connected to the ferrule (100) and a rear end fitted in the crimping seat (300).


     
    3. The fiber optic connector according to claim 2,
    wherein the ferrule (100) and the ferrule seat (200) are formed into a single piece.
     
    4. The fiber optic connector according to claim 2,
    wherein a slot (201) is formed in an outer circumferential surface of the front end of the ferrule seat (200),
    wherein a retaining member (910) is adapted to fit in the slot (201) through the housing, and wherein the spring (500) is mounted to push the retaining member (910), so as to exert an axial elastic force on the ferrule assembly.
     
    5. The fiber optic connector according to claim 4,
    wherein a spring holding seat (700) and a spring moving block (600) are provided in the housing, and the spring (500) is compressed between the spring holding seat (700) and the spring moving block (600); and
    wherein the spring moving block (600) abuts against the retaining member (910) under the push of the spring (500).
     
    6. The fiber optic connector according to claim 5,
    wherein a protrusion (310) is formed on a front end portion of the crimping seat (300), and
    wherein the protrusion (310) is adapted for snap-fitting into a recess formed in the spring holding seat (700).
     
    7. The fiber optic connector according to claim 6,
    wherein an insertion opening (890) is formed in the housing, through which the retaining member (910) is adapted to be inserted into the slot (201) of the ferrule seat (200).
     
    8. The fiber optic connector according to claim 7,
    wherein the crimping seat (300) has an insertion chamber defined by a plurality of petal shaped parts, and the rear end of the ferrule seat (200) is adapted to be inserted into the insertion chamber of the crimping seat (300).
     
    9. The fiber optic connector according to claim 8, further comprising:

    a crimp ring (410) configured to crimp a strengthening element of an optical cable (10) on a rear end of the crimping seat (300); and

    a stress relief tube (400) configured to be sleeved on the crimp ring (410) crimped on the rear end of the crimping seat (300).


     
    10. The fiber optic connector according to claim 9, further comprising: a dust cap (110) fitted on the front end of the ferrule (100).
     
    11. The fiber optic connector according to claim 10,
    wherein the first pre-assembly further comprises the optical cable (10), the dust cap (110), and the stress relief tube (400);
    wherein the second pre-assembly further comprises the spring moving block (600) and the spring holding seat (700) pre-assembled in the housing and
    wherein the protrusion (310) of the crimping seat (300) is adapted for snap-fitting into the recess of the spring holding seat (700) so as to limit the first pre-assembly in the housing.
     
    12. A method of assembling a fiber optic connector, comprising steps of:

    pre-assembling an optical cable (10), a dust cap (110), a ferrule assembly, a crimping seat (300), a crimp ring (410) and a stress relief tube (400) together to form a cable connection assembly (1) as a whole;

    pre-assembling a spring (500), a spring moving block (600) and a spring holding seat (700) in a housing of the fiber optic connector before the cable connection assembly (1) is inserted into the housing; and

    inserting the cable connection assembly (1) as a whole into the housing in which the spring (500), the spring moving block (600) and the spring holding seat (700) have been pre-assembled,

    wherein the ferrule assembly is pre-assembled into the crimping seat (300) in a manner of being movable relative to the crimping seat (300),

    wherein after the cable connection assembly (1) is inserted into the housing, the crimping seat (300) is snap-fitted in the spring holding seat (700), so as to limit the cable connection assembly (1) in the housing, and

    wherein after the cable connection assembly (1) is inserted into the housing, the spring (500) pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring (500) relative to the crimping seat (300).


     
    13. The method according to claim 12, further comprising a step of:
    pulling the cable connection assembly (1) through an elongated pipe before inserting the cable connection assembly (1) into the housing.
     
    14. The method according to claim 12, wherein the ferrule assembly comprising:

    a ferrule (100); and

    a ferrule seat (200) with a front end fixedly connected to the ferrule (100) and a rear end fitted in the crimping seat (300).


     
    15. The method according to claim 14,
    wherein a slot (201) is formed in an outer circumferential surface of a front end of the ferrule seat (200), and
    wherein a retaining member (910) is fitted in the slot (201) through the housing after the ferrule seat (200) is inserted into the housing, so as to block the ferrule seat (200) from being moved out of the housing under the push of the spring (500).
     
    16. The method according to claim 15,
    wherein the spring (500) is compressed between the spring moving block (600) and the spring holding seat (700); and
    wherein the spring moving block (600) abuts against the retaining member (910) under the push of the spring (500).
     
    17. The method according to claim 16,
    wherein a protrusion (310) is formed on a front end portion of the crimping seat (300), and
    wherein the protrusion (310) is snap-fitted into a recess formed in the spring holding seat (700) after the crimping seat (300) is inserted into the housing.
     
    18. The method according to claim 17,
    wherein an insertion opening (890) is formed in the housing, and the retaining member (910) is inserted into the slot (201) of the ferrule seat (200) through the insertion opening (890) after the ferrule assembly is inserted into the housing.
     
    19. The method according to claim 18,
    wherein the crimping seat (300) has an insertion chamber defined by a plurality of petal shaped parts, and the rear end of the ferrule seat (200) is inserted into the insertion chamber of the crimping seat (300).
     
    20. The method according to claim 19,
    wherein the crimp ring (410) is configured to crimp a strengthening element of the optical cable (10) on a rear end of the crimping seat (300); and
    wherein the stress relief tube (400) is configured to be sleeved on the crimp ring (410) crimped on the rear end of the crimping seat (300).
     


    Ansprüche

    1. Ein LWL-Steckverbinder, beinhaltend ein Gehäuse, eine Feder (500), eine Ferrulenanordnung und einen Crimpsitz (300), beinhaltend:

    eine erste Vormontage, die angepasst ist, um in eine zweite Vormontage eingeführt zu werden, wobei die erste Vormontage die Ferrulenanordnung und den Crimpsitz (300) beinhaltet, wobei die Ferrulenanordnung angepasst ist, um in den Crimpsitz (300) vormontiert zu werden, sodass die Ferrulenanordnung relativ zu dem Crimpsitz (300) beweglich ist, wobei die zweite Vormontage das Gehäuse und die Feder (500) beinhaltet, sodass die Feder (500) angepasst ist, um in das Gehäuse vormontiert zu werden, und

    wobei die erste Vormontage angepasst ist, um in die zweite Vormontage eingeführt zu werden, sodass der Crimpsitz (300) bereitgestellt ist, um zur Schnapppassung in dem Gehäuse angepasst zu sein, wobei die Feder (500) bereitgestellt ist, um die Ferrulenanordnung zu drücken, und die Ferrulenanordnung angebracht ist, um relativ zu dem Crimpsitz (300) gegen die Feder (500) beweglich zu sein.


     
    2. LWL-Steckverbinder gemäß Anspruch 1, wobei die Ferrulenanordnung Folgendes beinhaltet:

    eine Ferrule (100); und

    einen Ferrulensitz (200) mit einem vorderen Ende, das fest mit der Ferrule (100) verbunden ist, und einem hinteren Ende, das in den Crimpsitz (300) gepasst ist.


     
    3. LWL-Steckverbinder gemäß Anspruch 2,
    wobei die Ferrule (100) und der Ferrulensitz (200) zu einem einzigen Stück gebildet sind.
     
    4. LWL-Steckverbinder gemäß Anspruch 2,
    wobei in einer äußeren Umfangsfläche des vorderen Endes des Ferrulensitzes (200) eine Aussparung (201) gebildet ist,
    wobei ein Rückhalteelement (910) angepasst ist, um durch das Gehäuse in die Aussparung (201) zu passen, und
    wobei die Feder (500) angebracht ist, um das Rückhalteelement (910) zu drücken, um eine axiale Federkraft auf die Ferrulenanordnung auszuüben.
     
    5. LWL-Steckverbinder gemäß Anspruch 4,
    wobei in dem Gehäuse ein Federhaltesitz (700) und ein Federbewegungsblock (600) bereitgestellt sind und die Feder (500) zwischen dem Federhaltesitz (700) und dem Federbewegungsblock (600) komprimiert wird; und
    wobei der Federbewegungsblock (600) unter dem Druck der Feder (500) an das Rückhalteelement (910) stößt.
     
    6. LWL-Steckverbinder gemäß Anspruch 5,
    wobei an einem Vorderendabschnitt des Crimpsitzes (300) ein Vorsprung (310) gebildet ist, und
    wobei der Vorsprung (310) zum Schnapppassen in eine in dem Federhaltesitz (700) gebildete Vertiefung angepasst ist.
     
    7. LWL-Steckverbinder gemäß Anspruch 6,
    wobei in dem Gehäuse eine Einführungsöffnung (890) gebildet ist, wobei das Rückhalteelement (910) angepasst ist, durch diese in die Aussparung (201) des Ferrulensitzes (200) eingeführt zu werden.
     
    8. LWL-Steckverbinder gemäß Anspruch 7,
    wobei der Crimpsitz (300) eine Einführungskammer aufweist, die durch eine Vielzahl von blütenblattförmigen Teilen definiert ist, und das hintere Ende des Ferrulensitzes (200) angepasst ist, um in die Einführungskammer des Crimpsitzes (300) eingeführt zu werden.
     
    9. LWL-Steckverbinder gemäß Anspruch 8, der ferner Folgendes beinhaltet:

    einen Crimpring (410), der konfiguriert ist, ein Verstärkungselement eines Lichtleitkabels (10) auf ein hinteres Ende des Crimpsitzes (300) zu crimpen; und

    einen Zugentlastungsschlauch (400), der konfiguriert ist, auf den Crimpring (410), der auf das hintere Ende des Crimpsitzes (300) gecrimpt ist, gestülpt zu werden.


     
    10. LWL-Steckverbinder gemäß Anspruch 9, der ferner Folgendes beinhaltet: eine Staubkappe (110), die auf das vordere Ende der Ferrule (100) gepasst ist.
     
    11. LWL-Steckverbinder gemäß Anspruch 10,
    wobei die erste Vormontage ferner das Lichtleitkabel (10), die Staubkappe (110) und den Zugentlastungsschlauch (400) beinhaltet;
    wobei die zweite Vormontage ferner den in dem Gehäuse vormontierten Federbewegungsblock (600) und Federhaltesitz (700) beinhaltet und
    wobei der Vorsprung (310) des Crimpsitzes (300) zum Schnapppassen in die Vertiefung des Federhaltesitzes (700) angepasst ist, um die erste Vormontage in dem Gehäuse zu begrenzen.
     
    12. Ein Verfahren zum Montieren eines LWL-Steckverbinders, das die folgenden Schritte beinhaltet:

    Zusammen-Vormontieren eines Lichtleitkabels (10), einer Staubkappe (110), einer Ferrulenanordnung, eines Crimpsitzes (300), eines Crimprings (410) und eines Zugentspannungsschlauchs (400), um eine Kabelverbindungsanordnung (1) als Ganzes zu bilden;

    Vormontieren einer Feder (500), eines Federbewegungsblocks (600) und eines Federhaltesitzes (700) in einem Gehäuse des LWL-Steckverbinders, bevor die Kabelverbindungsanordnung (1) in das Gehäuse eingeführt wird; und

    Einführen der Kabelverbindungsanordnung (1) als Ganzes in das Gehäuse, in dem die Feder (500), der Federbewegungsblock (600) und der Federhaltesitz (700) vormontiert worden sind,

    wobei die Ferrulenanordnung in den Crimpsitz (300) auf eine solche Weise vormontiert ist, dass sie relativ zu dem Crimpsitz (300) beweglich ist,

    wobei, nachdem die Kabelverbindungsanordnung (1) in das Gehäuse eingeführt worden ist, der Crimpsitz (300) in den Federhaltesitz (700) schnappgepasst wird, um die Kabelverbindungsanordnung (1) in dem Gehäuse zu begrenzen, und

    wobei, nachdem die Kabelverbindungsanordnung (1) in das Gehäuse eingeführt worden ist, die Feder (500) die Ferrulenanordnung drückt, sodass die Ferrulenanordnung in der Lage ist, relativ zu dem Crimpsitz (300) gegen die Feder (500) bewegt zu werden.


     
    13. Verfahren gemäß Anspruch 12, das ferner einen folgenden Schritt beinhaltet:
    Ziehen der Kabelverbindungsanordnung (1) durch ein längliches Rohr, bevor die Kabelverbindungsanordnung (1) in das Gehäuse eingeführt wird.
     
    14. Verfahren gemäß Anspruch 12, wobei die Ferrulenanordnung Folgendes beinhaltet:

    eine Ferrule (100); und

    einen Ferrulensitz (200) mit einem vorderen Ende, das fest mit der Ferrule (100) verbunden ist, und einem hinteren Ende, das in den Crimpsitz (300) gepasst ist.


     
    15. Verfahren gemäß Anspruch 14,
    wobei in einer äußeren Umfangsfläche eines vorderen Endes des Ferrulensitzes (200) eine Aussparung (201) gebildet ist, und
    wobei ein Rückhalteelement (910) durch das Gehäuse in die Aussparung (201) gepasst wird, nachdem der Ferrulensitz (200) in das Gehäuse eingeführt worden ist, um den Ferrulensitz (200) davon abzuhalten, unter dem Druck der Feder (500) aus dem Gehäuse bewegt zu werden.
     
    16. Verfahren gemäß Anspruch 15,
    wobei die Feder (500) zwischen dem Federbewegungsblock (600) und dem Federhaltesitz (700) komprimiert wird; und
    wobei der Federbewegungsblock (600) unter dem Druck der Feder (500) an das Rückhalteelement (910) stößt.
     
    17. Verfahren gemäß Anspruch 16,
    wobei an einem Vorderendabschnitt des Crimpsitzes (300) ein Vorsprung (310) gebildet ist, und
    wobei der Vorsprung (310) in eine in dem Federhaltesitz (700) gebildete Vertiefung schnappgepasst wird, nachdem der Crimpsitz (300) in das Gehäuse eingeführt worden ist.
     
    18. Verfahren gemäß Anspruch 17,
    wobei in dem Gehäuse eine Einführungsöffnung (890) gebildet ist und das Rückhalteelement (910) durch die Einführungsöffnung (890) in die Aussparung (201) des Ferrulensitzes (200) eingeführt wird, nachdem die Ferrulenanordnung in das Gehäuse eingeführt worden ist.
     
    19. Verfahren gemäß Anspruch 18,
    wobei der Crimpsitz (300) eine Einführungskammer aufweist, die durch eine Vielzahl von blütenblattförmigen Teilen definiert ist, und das hintere Ende des Ferrulensitzes (200) in die Einführungskammer des Crimpsitzes (300) eingeführt wird.
     
    20. Verfahren gemäß Anspruch 19,
    wobei der Crimpring (410) konfiguriert ist, ein Verstärkungselement des Lichtleitkabels (10) auf ein hinteres Ende des Crimpsitzes (300) zu crimpen; und
    wobei der Zugentlastungsschlauch (400) konfiguriert ist, auf den Crimpring (410), der auf das hintere Ende des Crimpsitzes (300) gecrimpt ist, gestülpt zu werden.
     


    Revendications

    1. Un connecteur de fibres optiques comprenant un logement, un ressort (500), un assemblage formant ferrule et une embase de sertissage (300), comprenant :

    un premier pré-assemblage conçu pour être inséré dans un deuxième pré-assemblage, le premier pré-assemblage comprenant l'assemblage formant ferrule et l'embase de sertissage (300) dans laquelle l'assemblage formant ferrule est conçu pour être pré-assemblé dans l'embase de sertissage (300) de telle sorte que l'assemblage formant ferrule est mobile relativement à l'embase de sertissage (300), le deuxième pré-assemblage comprenant le logement et le ressort (500), de telle sorte que le ressort (500) est conçu pour être pré-assemblé dans le logement, et

    où le premier pré-assemblage est conçu pour être inséré dans le deuxième pré-assemblage de telle sorte que l'embase de sertissage (300) est prévue pour être conçue pour un emboîtement-pression dans le logement, le ressort (500) est prévu pour pousser l'assemblage formant ferrule, et l'assemblage formant ferrule est monté pour être mobile à l'encontre du ressort (500) relativement à l'embase de sertissage (300).


     
    2. Le connecteur de fibres optiques selon la revendication 1, où l'assemblage formant ferrule comprend :

    une ferrule (100) ; et

    une embase de ferrule (200) avec une extrémité avant connectée de façon fixe à la ferrule (100) et une extrémité arrière emboîtée dans l'embase de sertissage (300).


     
    3. Le connecteur de fibres optiques selon la revendication 2,
    où la ferrule (100) et l'embase de ferrule (200) sont formées d'une seule pièce.
     
    4. Le connecteur de fibres optiques selon la revendication 2,
    où une fente (201) est formée dans une surface circonférentielle externe de l'extrémité avant de l'embase de ferrule (200),
    où un élément de retenue (910) est conçu pour s'emboîter dans la fente (201) à travers le logement, et
    où le ressort (500) est monté pour pousser l'élément de retenue (910), de façon à exercer une force élastique axiale sur l'assemblage formant ferrule.
     
    5. Le connecteur de fibres optiques selon la revendication 4,
    où une embase de maintien de ressort (700) et un bloc à déplacement par ressort (600) sont prévus dans le logement, et le ressort (500) est comprimé entre l'embase de maintien de ressort (700) et le bloc à déplacement par ressort (600) ; et
    où le bloc à déplacement par ressort (600) se met en aboutement contre l'élément de retenue (910) sous la poussée du ressort (500).
     
    6. Le connecteur de fibres optiques selon la revendication 5,
    où une saillie (310) est formée sur une portion d'extrémité avant de l'embase de sertissage (300), et
    où la saillie (310) est conçue pour un emboîtement-pression dans un renfoncement formé dans l'embase de maintien de ressort (700).
     
    7. Le connecteur de fibres optiques selon la revendication 6,
    où une ouverture d'insertion (890) est formée dans le logement, à travers laquelle l'élément de retenue (910) est conçu pour être inséré dans la fente (201) de l'embase de ferrule (200).
     
    8. Le connecteur de fibres optiques selon la revendication 7,
    où l'embase de sertissage (300) a une chambre d'insertion définie par une pluralité de parties en forme de pétales, et l'extrémité arrière de l'embase de ferrule (200) est conçue pour être insérée dans la chambre d'insertion de l'embase de sertissage (300).
     
    9. Le connecteur de fibres optiques selon la revendication 8, comprenant en outre :

    un anneau à sertir (410) configuré pour sertir un élément de renforcement d'un câble optique (10) sur une extrémité arrière de l'embase de sertissage (300) ; et

    un tube de soulagement de contrainte (400) configuré pour être chemisé sur l'anneau à sertir (410) serti sur l'extrémité arrière de l'embase de sertissage (300).


     
    10. Le connecteur de fibres optiques selon la revendication 9, comprenant en outre : un cache-poussière (110) emboîté sur l'extrémité avant de la ferrule (100).
     
    11. Le connecteur de fibres optiques selon la revendication 10,
    où le premier pré-assemblage comprend en outre le câble optique (10), le cache-poussière (110), et le tube de soulagement de contrainte (400) ;
    où le deuxième pré-assemblage comprend en outre le bloc à déplacement par ressort (600) et l'embase de maintien de ressort (700) pré-assemblés dans le logement et où la saillie (310) de l'embase de sertissage (300) est conçue pour un emboîtement-pression dans le renfoncement de l'embase de maintien de ressort (700) de façon à limiter le premier pré-assemblage dans le logement.
     
    12. Un procédé d'assemblage d'un connecteur de fibres optiques, comprenant les étapes consistant à :

    pré-assembler un câble optique (10), un cache-poussière (110), un assemblage formant ferrule, une embase de sertissage (300), un anneau à sertir (410) et un tube de soulagement de contrainte (400) ensemble afin de former un assemblage de connexion de câble (1) comme un tout ;

    pré-assembler un ressort (500), un bloc à déplacement par ressort (600) et une embase de maintien de ressort (700) dans un logement du connecteur de fibres optiques avant que l'assemblage de connexion de câble (1) soit inséré dans le logement ; et

    insérer l'assemblage de connexion de câble (1) comme un tout dans le logement dans lequel le ressort (500), le bloc à déplacement par ressort (600) et l'embase de maintien de ressort (700) ont été pré-assemblés,

    où l'assemblage formant ferrule est pré-assemblé dans l'embase de sertissage (300) selon une manière qui soit mobile relativement à l'embase de sertissage (300),

    où après que l'assemblage de connexion de câble (1) est inséré dans le logement, l'embase de sertissage (300) est emboîtée par pression dans l'embase de maintien de ressort (700), de façon à limiter l'assemblage de connexion de câble (1) dans le logement, et

    où après que l'assemblage de connexion de câble (1) est inséré dans le logement, le ressort (500) pousse l'assemblage formant ferrule, de sorte que l'assemblage formant ferrule est à même d'être déplacé à l'encontre du ressort (500) relativement à l'embase de sertissage (300).


     
    13. Le procédé selon la revendication 12, comprenant en outre une étape consistant à :
    tirer l'assemblage de connexion de câble (1) à travers un conduit allongé avant d'insérer l'assemblage de connexion de câble (1) dans le logement.
     
    14. Le procédé selon la revendication 12, où l'assemblage formant ferrule comprenant :

    une ferrule (100) ; et

    une embase de ferrule (200) avec une extrémité avant connectée de façon fixe à la ferrule (100) et une extrémité arrière emboîtée dans l'embase de sertissage (300).


     
    15. Le procédé selon la revendication 14,
    où une fente (201) est formée dans une surface circonférentielle externe d'une extrémité avant de l'embase de ferrule (200), et
    où un élément de retenue (910) est emboîté dans la fente (201) à travers le logement après que l'embase de ferrule (200) est insérée dans le logement, de façon à bloquer l'embase de ferrule (200) pour ne pas sortir par déplacement du logement sous la poussée du ressort (500).
     
    16. Le procédé selon la revendication 15,
    où le ressort (500) est comprimé entre le bloc à déplacement par ressort (600) et l'embase de maintien de ressort (700) ; et
    où le bloc à déplacement par ressort (600) se met en aboutement contre l'élément de retenue (910) sous la poussée du ressort (500).
     
    17. Le procédé selon la revendication 16,
    où une saillie (310) est formée sur une portion d'extrémité avant de l'embase de sertissage (300), et
    où la saillie (310) est emboîtée par pression dans un renfoncement formé dans l'embase de maintien de ressort (700) après que l'embase de sertissage (300) est insérée dans le logement.
     
    18. Le procédé selon la revendication 17,
    où une ouverture d'insertion (890) est formée dans le logement, et l'élément de retenue (910) est inséré dans la fente (201) de l'embase de ferrule (200) à travers l'ouverture d'insertion (890) après que l'assemblage formant ferrule est inséré dans le logement.
     
    19. Le procédé selon la revendication 18,
    où l'embase de sertissage (300) a une chambre d'insertion définie par une pluralité de parties en forme de pétales, et l'extrémité arrière de l'embase de ferrule (200) est insérée dans la chambre d'insertion de l'embase de sertissage (300).
     
    20. Le procédé selon la revendication 19,
    où l'anneau à sertir (410) configuré pour sertir un élément de renforcement du câble optique (10) sur une extrémité arrière de l'embase de sertissage (300) ; et
    où le tube de soulagement de contrainte (400) est configuré pour être chemisé sur l'anneau à sertir (410) serti sur l'extrémité arrière de l'embase de sertissage (300).
     




    Drawing












    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description