JP5755872B2 - Optical connector and method for manufacturing optical connector with cable - Google Patents

Optical connector and method for manufacturing optical connector with cable Download PDF

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JP5755872B2
JP5755872B2 JP2010266855A JP2010266855A JP5755872B2 JP 5755872 B2 JP5755872 B2 JP 5755872B2 JP 2010266855 A JP2010266855 A JP 2010266855A JP 2010266855 A JP2010266855 A JP 2010266855A JP 5755872 B2 JP5755872 B2 JP 5755872B2
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optical fiber
portion
cable
direction
optical connector
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JP2012118221A (en
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研爾 桑原
研爾 桑原
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スリーエム イノベイティブ プロパティズ カンパニー
スリーエム イノベイティブ プロパティズ カンパニー
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Description

  The present invention relates to an optical connector for connecting optical fibers to each other and a method for manufacturing an optical connector with a cable.

  There has been known a technique in which an optical connector with a cable is manufactured by assembling an optical fiber to a connector body at a site other than a factory (see, for example, Patent Document 1). The optical connector with a cable described in Patent Document 1 includes a connector main body having a connection optical fiber that is built in the ferrule in advance so as to protrude from the rear end of the ferrule having a joint end surface at the front end, and after the ferrule of the connection optical fiber. And a retaining member that has a retaining groove for retaining another optical fiber that is optically connected to the portion protruding from the end and is detachably connectable to the connector body. The connector body has a substantially L-shaped housing, and the clasp is inserted into the housing along the axis of the ferrule and then rotated 90 ° to be accommodated in the housing with the optical fiber bent. The

JP 2007-240943 A

  By the way, in the optical connector described in Patent Document 1, when another optical fiber is assembled to the connector main body at an optical fiber installation site or the like, the connection between the connection optical fiber built in the connector main body and the other optical fiber is secured. In order to achieve this, it is preferable that the optical fibers are brought into a butt-end state to cause the other optical fibers to bend and the operator can visually check the bends. However, since the housing of the connector body described in Patent Document 1 has an L shape, it is difficult to visually check the bent state when the optical fiber is bent toward the housing.

  An object of the present invention is to provide an optical connector and a method for manufacturing an optical connector with a cable, in which bending of the optical fiber can be easily visually recognized from the outside when the optical fiber is assembled.

One aspect of the present invention is an optical connector to which an optical fiber cable from which an optical fiber strand having a predetermined length protrudes is assembled, wherein a distal end portion extends in a first direction and a proximal end portion extends in the first direction. A substantially L-shaped main body having a cylindrical ferrule extending in a second direction substantially perpendicular to the front end and projecting from the distal end in the first direction, and a base end portion of the main body from the axis of the ferrule. in the use position along the predetermined angle inclined working position and a second direction toward the two directions, respectively and a holding suitable cable retention means the leading end of the optical fiber cable, the cable retention means, in the working position The tip of the optical fiber cable is held so that the optical fiber is bent in a predetermined direction, and the main body has a notch that allows visual observation of the bending of the optical fiber when the optical fiber cable is held in the working position. The A connector.

According to another aspect of the present invention, there is provided a method of manufacturing an optical connector with a cable in which an optical fiber cable from which an optical fiber strand having a predetermined length protrudes is assembled to the optical connector, and the optical connector has a tip portion in the first direction. A substantially L-shaped main body having a cylindrical ferrule extending in the first direction from the distal end and extending in a second direction substantially perpendicular to the first direction. A cable holding member attached to the base end portion of the main body and holding the tip end portion of the optical fiber cable, and attaching the jig to the tip end portion of the main body; and the cable holding member in the second direction from the axis of the ferrule The optical fiber is inserted into the main body until the tip of the optical fiber comes into contact with the end face of the jig while being held at the working position inclined by a predetermined angle toward the second direction. Bend to the opposite side of A degree, a step of visually check the deflection of the optical fiber through a cutout provided in the main body, the tip of the optical fiber and a step of fixing to the body, the manufacture of the cable with optical connector Method.

  According to the present invention, since the tip of the optical fiber cable can be held at a working position inclined by a predetermined angle from the axis of the ferrule, the optical fiber is bent to the opposite side of the main body when the optical fiber is assembled. And the bending of the optical fiber can be easily visually recognized from the outside.

The perspective view which shows the whole structure of the optical connector which concerns on embodiment of this invention. The figure which shows one procedure of the manufacturing method of the optical connector with a cable which concerns on embodiment of this invention. The perspective view of the cable optical connector which concerns on embodiment of this invention. The perspective view which shows the state which fitted the adapter to the optical connector with a cable of FIG. (A), (b) is a perspective view of the housing which comprises the optical connector of FIG. 1, respectively. FIG. 4 is a horizontal sectional view of the optical connector with cable of FIG. 3. The disassembled perspective view of the holder assembly which comprises the optical connector of FIG. The perspective view of the cap which comprises the optical connector of FIG. The perspective view of the cable holder which comprises the optical connector of FIG. The arrow X figure of FIG.5 (b). (A) is a perspective view of a jig | tool, (b) is an exploded perspective view of a jig | tool. The perspective view which shows one procedure of the manufacturing method of the optical connector with a cable. (A) is horizontal direction sectional drawing of FIG. 12, (b) is the b section enlarged view of FIG. 13 (a). The perspective view which shows the modification of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing the overall configuration of an optical connector 100 according to an embodiment of the present invention, and FIG. 2 shows a method for manufacturing an optical connector with a cable in which an optical fiber 200 is assembled to the optical connector 100. It is a figure which shows a procedure. In the following, for convenience, front and rear, left and right directions and up and down directions are defined as illustrated, and the configuration of each part will be described according to this definition, but the directions are not limited thereto.

  As shown in FIG. 1, the optical connector 100 includes a main body 1 having a substantially L shape in plan view extending in the front-rear direction and the left-right direction, and a cable holder 2 that is rotatably attached to a rear end portion of the main body 1. And have. A substantially cylindrical ferrule 3 protrudes forward from the front end surface of the main body 1. An optical fiber strand 201 at the tip of the optical fiber 200 shown in FIG. 2 is inserted into the central through hole 3 a of the ferrule 3, and the optical fiber 200 is integrally assembled with the optical connector 100. The assembly work of the optical fiber 200 is performed at the construction work site of the optical fiber 100 or the like.

  When the assembly work of the optical fiber 200 is performed on site, the jig 300 is first attached to the front end of the main body 1 as shown in FIG. Next, the optical fiber 201 is inserted into the main body 1 from the rear via the cable holder 2. Alternatively, the optical fiber 201 is inserted into the main body 1 from the rear via the cable holder 2, and then the jig 300 is attached to the front end portion of the main body 1. The inserted optical fiber 201 penetrates the ferrule 3 of the main body 1 and comes into contact with the jig 300, whereby the protruding amount of the optical fiber 201 from the front end surface of the ferrule 3 is defined as described later. The At this time, the operator visually confirms the amount of bending of the optical fiber 201 from the outside to determine whether or not the tip of the optical fiber 201 is in contact with the jig 300, that is, the tip of the optical fiber 201. Is determined to project from the front end face of the ferrule 3 by a predetermined amount.

  In this specification, the optical fiber 201 refers to an optical fiber 200 having a core and a clad covering the periphery of the core, and an optical fiber core having a soft coating on the outer surface of the clad of the optical fiber 200. This is called line 202. The optical fiber cable 203 includes a single-core or multi-core optical fiber in a sheath (generally a resin sheath) together with a tensile member, and includes an optical fiber cord in a broad sense.

  In FIG. 2, a jacket gripping member 204 is attached to the tip of the optical fiber cable 203, an optical fiber core 202 having a predetermined length protrudes from the tip of the jacket gripping member 204, and from the tip of the optical fiber core 202. An optical fiber 201 having a predetermined length protrudes. Slit grooves 205 that fit into the guide portions 24 (FIG. 9) of the cable holder 2 are formed in the longitudinal direction on the upper and lower surfaces of the jacket holding member 204, and the optical fiber 201 is guided by the cable holder 2. While being inserted into the main body 1. Note that the attachment of the jacket gripping member 204 to the optical fiber cable 203 and the removal of the coating of the optical fiber cable 203 can be performed at a work site using a jig (not shown). Omitted. The length of the optical fiber 201 protruding from the outer gripping member 204 is set to a predetermined length using a jig.

  FIG. 3 is a perspective view of an optical connector 400 with a cable in which the optical fiber 200 is assembled to the optical connector 100. FIG. 3 shows a connector usage state in which the jig 300 is removed from the optical connector 100. In this connector use state, the cable holder 2 is rotated rightward from the state shown in FIG. 1 and stored inside the main body 1, and the optical fiber cable 203 extends in a direction orthogonal to the ferrule 11. It can be used as a type optical connector. Hereinafter, the position of the cable holder 2 shown in FIG. 1 is referred to as a work position, and the position of the cable holder 2 shown in FIG. 3 is referred to as a use position.

  FIG. 4 is a perspective view showing a state in which the optical connector with cable 400 is fitted to the adapter 500. The adapter 500 has fitted portions 501 and 502 into which optical connectors are fitted at both front and rear ends, and the adapter 500 is provided between the fitted portion 501 and the fitted portion 502 inside the adapter 500. A split sleeve (not shown) is installed along the front-rear direction. A pair of optical fibers 200 can be connected via the adapter 500 by fitting the optical connector with cable 400 to the fitted portion 501 and fitting another optical connector to the fitted portion 502.

  Hereinafter, the configuration of the optical connector 100 will be described in more detail. In FIG. 1, a main body 1 of an optical connector 100 includes a housing 10 that is substantially L-shaped in plan view extending in the front-rear direction and the left-right direction, a ferrule 3 that protrudes from the front end surface of the housing 10, and light that passes through the ferrule 3. And a fixing portion 20 for fixing the fiber strand 201 in the housing 10.

  5A and 5B are perspective views of the housing 10, respectively. FIG. 6 is a horizontal cross-sectional view of the optical connector 400 with a cable in FIG. The housing 10 is an integrally molded product using resin as a constituent material, and as shown in FIGS. 5A and 5B, the front fitting portion 11 into which the jig 300 and the adapter 500 are fitted, and a cable holding unit. And a rear housing portion 12 for housing the tool 2. A substantially rectangular concave portion 13 is provided on the upper surface of the fitting portion 11, and a front wall portion 111, a rear wall portion 112, and a pair of left and right side wall portions 113 and 114 are formed around the concave portion 13. The upper and lower end surfaces of the front wall portion 111, the rear wall portion 112, and the side wall portions 113 and 114 constitute a flat fitting surface. Although not shown, a pair of left and right through holes that are elongated in the front-rear direction are opened on the bottom surface of the recess 13, and legs 33 (FIG. 7) of the holder 31 described later are fitted into the through holes.

  As shown in FIG. 6, a groove portion 14 having a predetermined depth is formed on the front end surface of the front wall portion 111 of the housing 10, and a through hole 14 a is opened in the front-rear direction at the center of the groove portion 14. As shown in FIG. 5A, a substantially cylindrical ferrule 3 is fitted into the groove portion 14 from the front, and the ferrule 3 is fixed integrally to the housing 10 with an adhesive. A through hole 3a through which the optical fiber 201 is penetrated is opened at the center of the ferrule 3, and a tapered guide surface 3b is formed on the rear end surface of the ferrule 3 so as to communicate with the through hole 3a. The ferrule 3 can be made of ceramic, resin, or the like.

  A trapezoidal notch 115 is provided on the front surface of the rear wall portion 112 in the vertical direction, and substantially rectangular guide portions 116 project from the inner side surfaces of the side wall portions 113 and 114, respectively. As shown in FIG. 6, cylindrical portions 117 and 118 protrude from the front and rear surfaces of the rear wall portion 112 coaxially with the ferrule 3, respectively. The front cylindrical portion 117 has a smaller diameter than the rear cylindrical portion 118 and a smaller diameter than the width of the notch 115. A through hole 112 a is opened in the rear wall portion 112 coaxially with the through hole 3 a of the ferrule 3 from the rear end surface of the column portion 118 to the front end surface of the column portion 117. The diameter of the through hole 112a is gradually reduced from the rear to the front, and a tapered guide surface is formed on the peripheral surface of the through hole 112a. In particular, in FIG. 6, the guide surface is not linear but curved in a convex shape.

  A pair of substantially L-shaped arms 15 are supported on the left and right outer surfaces of the rear end portions of the side wall portions 113 and 114, and the arms 15 extend forward. A claw portion 151 that engages with an engagement groove of the jig 300 or the adapter 500 is provided at the distal end portion of the arm 15, and is gripped on the left and right outer surfaces of the arm 15 behind the claw portion 151 toward the left and right outer sides. A portion 152 is projected. When a compressive force is applied to the gripping part 152, the claw part 151 is displaced inward by elastic deformation of the arm 15, and the engagement with the jig 300 and the adapter 500 can be released.

  As shown in FIGS. 5A and 5B, the housing portion 12 of the housing 10 has a substantially box shape with the rear surface and the right surface opened. A housing space 120 for housing the cable holder 2 is provided inside the housing portion 12, and an upper wall portion 121, a bottom wall portion 122, a left wall portion 123, and a front wall portion 124 are formed around the housing space 120. Has been. The upper wall part 121 and the bottom wall part 122 are respectively connected to the rear wall part 112 of the fitting part 11. The upper end surface of the upper wall portion 121 and the lower end surface of the bottom wall portion 122 respectively extend in the horizontal direction above and below the upper and lower end surfaces (fitting surfaces) of the fitting portion 11, and are stepped with respect to the fitting surface. Has produced. The left side wall part 123 is connected to the left side wall part 113 of the fitting part 11, and a long hole-like notch 16 is provided from the rear end surface to the rear wall part 112 at the center in the height direction. The front wall portion 124 connects the front edge of the upper wall portion 121 and the front edge of the bottom wall portion 122 to the right of the fitting portion 11.

  In the upper wall 121 and the bottom wall 122, a support hole 17 that pivotally supports the cable holder 2 is opened coaxially in the vertical direction slightly to the right of the axis of the ferrule 3. A through hole 18 for holding the cable holder 2 in the working position (FIG. 2) is opened on the left rear end of the upper wall 121 and the bottom wall 122 on the same axis in the vertical direction. The through-hole 19 for holding the cable holder 2 in a use position (FIG. 3) is opened coaxially in the vertical direction. The through hole 18 has a circular shape, whereas the through hole 19 has a rectangular shape with a larger opening area than the through hole 18, whereby the cable holder 2 can be held at the working position with a weaker force than the use position. .

  In FIG. 1, the fixing portion 20 includes a holder assembly 30 that is accommodated in the recess 13 of the housing 10 from above, and a cap 40 that is accommodated from above the holder assembly 30. FIG. 7 is an exploded perspective view of the holder assembly 30. The holder assembly 30 includes a holder 31 that is an integrally molded product made of resin or the like, and an element 35 that is built in the holder 31. The holder 31 is fixed to a substantially rectangular base 32, a pair of left and right legs 33 having a substantially U-shaped cross section extending downward from the bottom surface of the base 32, and inner surfaces of the left and right legs 33. And an element support portion 34 extending in the direction, and the entirety is symmetrical.

  The left and right end portions of the base portion 32 of the holder 31 protrude outward from the leg portion 33, and the outer shape of the base portion 32 is equal to the outer shape of the recess 13 of the housing 10. On the rear surfaces of the base 32 and the leg 33, a protrusion 311 corresponding to the notch 115 of the housing 10 is formed. A pair of projecting portions 312 are provided on the left and right outer surfaces of the leg portion 33 so as to be separated in the front-rear direction, and the guide portion 116 of the housing 10 is inserted inside the projecting portion 312. A substantially rectangular opening 310 is provided at the center of the base 32, and the upper portion of the element support 34 is opened through the opening 310. A groove 313 is provided on the upper surface of the element support portion 34 from the front end surface to the rear end surface.

  The element 35 is formed by bending a thin metal plate such as copper or aluminum that has been processed into a predetermined shape into a V-shape so as to have a bilaterally symmetric shape with a bending portion 36 extending in the front-rear direction as a fulcrum. The The element 35 has a pair of wing portions 37 disposed on both the left and right sides of the central axis, and a groove portion 38 having a substantially semicircular cross section is provided in the front-rear direction on the inner side surface of each wing portion 37 so as to face each other. The optical fiber 201 is inserted into the groove 38 as described later. In order to facilitate the insertion of the optical fiber 201 into the groove 38, the cross-sectional area of the groove 38 is gradually reduced toward the front. The bent portion 36 of the element 35 is inserted from the rear along the groove portion 313 of the holder 31, and the element 35 is supported inside the left and right leg portions 33 to constitute the holder assembly 30.

  FIG. 8 is a perspective view of the cap 40. The cap 40 is an integrally molded product made of resin and is a substantially rectangular base 41, and a pair of left and right legs 42 protruding from the bottom surface of the base 41 inside the left and right edges of the base 41. And has a symmetrical shape as a whole. Tapered portions 43 are respectively provided on the inner side surfaces of the left and right leg portions 42, and the interval between the inner sides of the left and right leg portions 42 is gradually narrowed by the tapered portion 43. As shown in FIG. 1, when the cap 40 is inserted from above through the opening 310 of the holder assembly 30, the leg portions 42 are pushed into the left and right sides of the wing portion 37 of the element 35. 1 is a half-inserted state in which the cap 40 is not completely inserted, and the wing portion 37 of the element 35 is open. By completely fitting the cap 40 from this state, a pressure contact force is applied to the wing portion 37 of the element 35 through the taper portion 43 to close the wing portion 37, and the optical fiber 201 is placed inside the element 35. Can be fixed.

  FIG. 9 is a perspective view of the cable holder 2. The cable holder 2 includes a substantially rectangular upper plate portion 21 and a lower plate portion 22 that face each other, and a side plate portion 23 that connects one edge portion of the upper plate portion 21 and the lower plate portion 22, and is vertically symmetrical. It has a shape. A rail-shaped guide portion 24 is provided in the longitudinal direction on the inner side surfaces of the upper plate portion 21 and the lower plate portion 22, and a projection portion 25 is provided at the longitudinal end portions of the inner side surfaces of the upper plate portion 21 and the lower plate portion 22. Is provided. The jacket gripping member 204 (FIG. 2) of the optical fiber 200 is slid and inserted into the cable holder 2 along the guide portion 24 until the distal end thereof abuts against the protrusion 25. As shown in FIG. 6, the side plate portion 23 of the cable holder 2 is provided with a substantially U-shaped slit hole, and a flexible thin plate portion 26 is formed inside the slit hole. An engaging claw portion 261 is provided at the distal end portion of the plate portion 26, and the engaging claw portion 261 engages with the engaging groove 206 of the outer gripping member 204, and the outer gripping member 204 is held by the cable holder 2. Is done.

  As shown in FIG. 9, shafts having shapes corresponding to the support holes 17 of the housing 10 are provided on the upper surface of the upper plate portion 21 and the lower surface of the lower plate portion 22 of the cable holder 2 in the vicinity of the corners on the side plate portion 23 side. A portion 27 is projected. Further, on the upper surface of the upper plate portion 21 and the lower surface of the lower plate portion 22, projecting portions 28 and 29 are respectively provided so as to correspond to the shapes and positions of the through holes 18 and 19 of the housing 10. Corner portions 210 on the shaft portion 27 side of the upper plate portion 21 and the lower plate portion 22 are formed in an arc shape so that the cable holder 2 rotates without interfering with the housing 10.

  As shown in FIG. 1, the cable holder 2 is inserted inside the housing portion 12 of the housing 10, and the shaft portions 27 are fitted into the upper and lower support holes 17 so as to be rotatably supported by the housing 10. . In the state of FIG. 1, the protrusion 28 of the cable holder 2 is fitted into the through hole 18 of the housing 10, and the cable holder 2 is positioned at the working position. In this working position, as shown in FIG. 13, the guide direction of the jacket gripping member 204 by the cable holder 2 (the direction of the guide portion 24), that is, the axis L1 of the optical fiber cable 203 when the optical fiber 201 is inserted is , It is inclined rightward with respect to the axis L0 of the ferrule 3 by a predetermined angle θ1 (for example, about 15 °). On the other hand, in the use position, the protrusion 29 of the cable holder 2 is fitted in the through hole 19 of the housing 10, and the cable holder 2 has the axis L 1 of the optical fiber cable 201 as the axis of the ferrule 3 as shown in FIG. It is accommodated by being rotated by a predetermined angle θ2 (90 degrees) to the right with respect to L0.

  FIG. 10 is a view taken along the arrow X in FIG. 5B (viewed from the rear). As shown in FIG. 10, projecting portions 125 project from the lower surface of the upper wall portion 121 and the upper surface of the bottom wall portion 122 of the housing 10 so as to face each other. As shown in FIG. 5B, the protrusion 125 is provided at the left front end of the upper wall 121 and the bottom wall 122. For this reason, when the cable holder 2 is further rotated leftward from the state of FIG. 1, the edge of the cable holder 2 comes into contact with the protruding portion 125, and the cable holder 2 can be held in the working position. . That is, in the present embodiment, the rotation range of the cable holder 2 is restricted by the protrusion 125, and the rotation of the cable holder 2 beyond the work position is prevented.

  A procedure for assembling the optical connector 400 with cable of FIG. 3 by assembling the optical fiber 200 to the optical connector 100 configured as described above will be described. When manufacturing the optical connector with cable 400, first, the jig 300 is attached to the fitting portion 11 on the front side of the housing 10 as shown in FIG. FIG. 11A is a perspective view of the jig 300, and FIG. 11B is an exploded perspective view of the jig 300. The jig 300 includes a jig main body 301 that is an integrally molded product made of resin, and a substantially cylindrical ferrule 302 that is incorporated in the jig main body 301, and the whole has a substantially symmetrical shape. .

  As shown in FIG. 11B, the jig main body 301 includes a fitted part 310 into which the optical connector 100 is fitted, a pressing part 320 that applies a pressing force to the cap 40 in FIG. A pair of left and right grips 330 for gripping, a ferrule support 340 that supports the ferrule 302 coaxially with the ferrule 3 of the optical connector 100, and a biasing member 350 that imparts a forward biasing force to the ferrule 302 Have. The fitted part 310 has a substantially box shape corresponding to the fitting part 11 of the housing 10, and the rear surface is open. The ferrule support portion 340 has a groove shape extending in the front-rear direction of a substantially arc-shaped cross section corresponding to the peripheral surface shape of the ferrule 302, and the ferrule 302 is accommodated in the ferrule support portion 340 from above.

  FIG. 12 is a perspective view showing a state where the optical fiber 200 is inserted into the optical connector 100. As shown in FIGS. 11 and 12, a notch 312 having a predetermined width in the left-right direction is formed on the upper wall 311 of the fitting portion 310 of the jig 300 from the rear end surface to the front, A notch 314 having a predetermined width in the vertical direction is formed from the rear end surface to the front. Further, a vertical plate portion 315 is provided on the outer side surfaces of the left and right side wall portions 313 across the notch 314, and an engagement groove 316 is formed in front of the vertical plate portion 315.

  As shown in FIG. 12, when the fitting portion 11 of the housing 10 is inserted inside the fitting portion 310 of the jig 300, the cap 40 on the upper surface of the housing moves forward along the notch 312, and the notch 314 The arm 15 on the side surface of the housing moves forward. FIG. 13A is a horizontal sectional view of FIG. As shown in FIG. 13A, when the claw portion 151 at the end of the arm is engaged with the groove portion 316 beyond the vertical plate portion 315, the jig 300 is locked to the housing 10. When a compressive force is applied to the grip portion 152 of the arm 15 from the left and right in this state, the engagement of the claw portion 151 is released and the jig 300 can be removed from the housing 10.

  As shown in FIG. 11B, one end portions of a pair of left and right arms 321 are supported on the inner wall surfaces of the lower end portions of the left and right grip portions 330. The arm 321 is curved and extends upward and rearward in a substantially L shape, and the pressing portion 320 of the jig 300 is attached to the other end of the arm 321, and the pressing portion 320 is the upper wall of the fitted portion 310. It is separated from the part 311 and is held in a substantially horizontal posture. In FIG. 12, when a pressing force is applied to the upper surface of the pressing portion 320, the pressing portion 320 is displaced downward by the elastic deformation of the arm 321, and the cap 40 can be pushed into the housing 10 of the optical connector 10.

  As shown in FIG. 13A, the urging member 350 extends in the left-right direction and has a substantially J shape in plan view, and is cantilevered on the inner surface of the rear end portion of the left grip portion 330. When the jig 300 is attached to the optical connector 100, the front end surface of the ferrule 3 and the rear end surface of the ferrule 302 come into contact with each other. At this time, due to the elastic deformation of the urging member 350, a rearward urging force acts on the ferrule 3 via the ferrule 302, and the front end surface of the ferrule 3 and the rear end surface of the ferrule 302 come into contact with each other by a desired pressing force.

  FIG.13 (b) is the b section enlarged view of Fig.13 (a). A groove 303 having a predetermined depth D corresponding to the protruding length of the optical fiber 201 is formed on the rear end surface of the ferrule 302. For this reason, when the optical fiber 201 is brought into contact with the bottom surface of the groove 303 in a state where the ferrules 3 and 302 are in contact with each other as shown in FIG. Projects by a length D. In this state, the protruding amount of the optical fiber 201 can be set to a predetermined value D by fixing the optical fiber 201 to the housing 10.

  In this case, as shown in FIG. 13A, the cable holder 2 is held at a working position inclined rightward with respect to the axis of the ferrule 3, and the optical fiber 201 is moved from the cable holder 2 to the housing 10. When the tip of the optical fiber 201 is in contact with the rear end surface of the ferrule 302 (the bottom surface of the groove 303), the optical fiber 201 is bent to the left. This bending is visible through the notch 16 in the left side wall 123 of the housing 10 as shown in FIG. 12, and whether or not the tip of the optical fiber 201 is in contact with the end face of the ferrule 302 is checked. Personnel can easily judge.

  On the other hand, when the cable holder 2 is held on the axis of the ferrule 3, the optical fiber 201 is inserted straight through the housing 10. For this reason, the bending direction of the optical fiber 201 is not specified, and when the tip of the optical fiber 201 comes into contact with the end surface of the ferrule 302, the optical fiber 201 bends to other than the left (for example, right). There is a fear. In this case, since the optical fiber 201 is bent toward the back of the housing 10, it is difficult for an operator to visually check the bending state of the optical fiber 201, and the tip of the optical fiber 201 is attached to the ferrule 302. It cannot be determined whether or not it is in contact with the end face.

  The manufacturing method of the optical connector with cable 400 according to the embodiment of the present invention is summarized as follows. First, the assembly procedure of the optical connector 100 will be described. When assembling the optical connector 100, first, as shown in FIG. 5A, the ferrule 3 is fitted into the groove 14 on the front end surface of the housing 10, and the ferrule 3 is bonded integrally to the housing 10. Next, as shown in FIG. 7, the element 35 is inserted along the groove 313 on the upper surface of the element support 34 of the holder 31 to form the holder assembly 30, and the holder assembly 30 is received in the recess 13 on the upper surface of the housing 10. To do. At this time, the position of the holder assembly 30 is regulated by the notch 115 and the guide portion 116 of the recess 13.

  Thereafter, the cap 40 is inserted into the opening 310 on the upper surface of the holder 31. In this case, the cap 40 is not completely inserted, and the wing portion 37 of the element 35 is in a semi-inserted state. Finally, as shown in FIG. 1, the cable holder 2 is inserted into the housing portion 12 of the housing 10 to fit the shaft portion 27 into the support hole 17 of the housing 10, and the cable holder 2 is rotated to the left. The protrusions 28 are fitted into the through holes 18 to move the cable holder 2 in the working position. The assembly of the optical connector 100 described above can be performed at a factory.

  At the site where the optical fiber 200 is laid, first, a jacket holding member 204 is attached to the tip of the optical fiber 200 using a jig, and the coating of the optical fiber cable 203 is removed, and a predetermined length as shown in FIG. The optical fiber 200 for assembling the optical connector from which the optical fiber 201 is protruded is formed. Next, the jig 300 is attached to the fitting portion 11 of the housing 10 of the optical connector 100. In this state, the optical fiber 201 is inserted into the housing while sliding the slit groove 205 of the jacket holding member 204 along the guide portion 24 of the cable holder 2. After inserting the optical fiber 201 into the housing, the jig 300 may be attached to the fitting portion 11 of the housing 10.

  As shown in FIG. 13, when the cable holder 2 is in the working position, the axis L <b> 1 of the optical fiber cable 203 intersects the inner peripheral surface of the tapered through hole 112 a of the rear wall portion 112 of the housing 10. For this reason, when the optical fiber 201 is inserted into the housing via the cable holder 2, the tip of the optical fiber 201 comes into contact with the inner peripheral surface of the through-hole 112 a and is guided to the through-hole 112 a. It advances and penetrates the groove 38 and the ferrule 3 of the element 35. At this time, the optical fiber 201 and the optical fiber 202 are bent inside the cable holder 2.

  When the jacket gripping member 204 is completely accommodated in the cable holder 2, the tip of the optical fiber strand 201 comes into contact with the rear end surface of the ferrule 302 in the jig, and the optical fiber strand 201 is shown in FIG. Receives a reaction force from the ferrule 302 and bends to the left. The worker visually observes the bent state through the notch 16 in the left side wall 123 of the housing 10 and determines whether or not the tip of the optical fiber 201 is in contact with the end face of the ferrule 302. When it is determined that the tip of the optical fiber 201 is in contact with the ferrule 302, a pressing force is applied to the pressing portion 320 of the jig 300 in FIG. As a result, a pressure contact force acts on the wing portion 37 of the element 35, and the optical fiber strand 201 is fixed inside the element 35.

  Thereafter, the right and left grips 152 of the housing 10 are gripped, the jig 300 is removed from the optical connector 100, and the manufacture of the optical connector 400 with cable is completed. When the optical connector with cable 400 is used, as shown in FIG. 3, the cable holder 2 is rotated to the right and accommodated in the accommodation space 120 (FIG. 5) inside the housing 10. Further, as shown in FIG. 4, the adapter 500 is attached to the fitting portion 11 of the housing 10, and the pair of optical fibers 200 are connected via the adapter 500.

According to the present embodiment, the following operational effects can be achieved.
(1) The cable holder 2 is rotatably provided on the substantially L-shaped main body 1 of the optical connector 100, and the protrusion 125 is protruded from the inner surface of the housing 10 of the main body 1 to operate the cable holder 2. The position-side rotation range is restricted, and the cable holder 2 is held at a predetermined angle θ1 from the axis L0 of the ferrule 3 to the use position side at the working position. As a result, when the tip of the optical fiber 201 is brought into contact with the ferrule 302 of the jig 300, the optical fiber 201 is bent to the opposite side of the housing 10, and the operator can change the bending state of the optical fiber 201. It can be easily visually observed.

(2) A cylindrical portion 118 is provided on the rear wall 112 of the fitting portion 11 of the housing 10 so as to protrude rearward, and a tapered through hole 112a that penetrates the rear wall 112 is provided. The axis L1 that is the insertion direction intersects with the inner peripheral surface of the through hole 112a. As a result, the tip of the optical fiber 201 is brought into contact with the peripheral surface of the through hole 112a and guided forward along the through hole 112a, so that the optical fiber 201 can be easily guided to the fixed portion 20.
(3) The optical fiber 201 is passed through the ferrule 3 at the tip of the optical connector 100 and brought into contact with the end face of the ferrule 302 of the jig 300. In this state, the cap 40 is pushed into the element 35. I fixed it. For this reason, it is not necessary to pre-install a ferrule having an optical fiber having a predetermined length in the housing 10, and the optical connector 100 can be shortened. Further, the number of parts is small, and the assembly of the optical connector 100 is easy.

  In the above embodiment, the optical connector 100 is configured by penetrating the optical fiber 201 inserted from the outside by a predetermined amount from the ferrule 3, but if it has a substantially L-shaped main body, The configuration of the optical connector is not limited to this. For example, the optical connector may be configured as shown in FIG. FIG. 14 shows a state in which a ferrule 602 having an optical fiber strand 601 of a predetermined length is assembled in the connector in advance, and the optical fiber strand 601 and the optical fiber strand 201 of the optical fiber 200 introduced from the outside are brought into contact with each other. The optical connector 600 with cable is configured by being fixed at As with the optical connector 100 described above, the fixing unit 620 includes a cap 640 and an element (not shown) that is pressed by pressing the cap 640, and the pair of optical fiber strands 201 and 601 are fixed inside the element. The

  In the above-described embodiment, the cable holder 2 is rotatably provided in the housing 10, but the tip end portion (outer gripping member 204) of the optical fiber cable 203 with respect to the axis L 0 of the ferrule 3 at the working position. The configuration of the cable holding means is not limited to this as long as it is held in a direction inclined by the predetermined angle θ1. For example, a guide portion that guides the jacket gripping member 204 may be provided on the inner surface of the housing 10, and the jacket gripping member 204 may be moved between the working position and the use position along the guide portion. The configuration of the cable holder 2 as the cable holding member is not limited to that described above. A restricting means other than the protrusion 125 may be provided to restrict the rotation range of the cable holder 2.

  A fitting portion 11 (first housing portion) formed along a first direction (for example, the front-rear direction) and a second direction (for example, left-right direction) that is continuous with the fitting portion 11 and is perpendicular to the first direction. The configuration of the housing 10 having the housing portion 12 (second housing portion) formed is not limited to that described above. The cylindrical portion 118 is provided on the rear wall portion 112 of the housing 10 so as to be provided with the tapered through hole 112a. However, the through hole 112a is provided so as to intersect the axis L1 of the optical fiber 201 at the working position. If it is possible, the structure of the guide part which guides the optical fiber strand 201 to the fixing | fixed part 20 is not restricted to this.

  The cap 40 as the operating member is fitted into the fitting portion 11 of the housing 10 by pressing force from the outside, and the pressing force is applied to the optical fiber 201 by the element 35 as the pressing member. The configuration of the fixing unit 20 that fixes the tip of the optical fiber 201 is not limited to this. That is, the present invention is not limited to the optical connector according to the embodiment as long as the features and functions of the present invention can be realized.

DESCRIPTION OF SYMBOLS 1 Main body 2 Cable holder 3 Ferrule 10 Housing 11 Fitting part 12 Storage part 20 Fixing part 35 Element 40 Cap 100 Optical connector 112a Through-hole 118 Cylindrical part 125 Projection part 300 Jig 400 Optical connector with cable

Claims (6)

  1. An optical connector to which an optical fiber cable from which an optical fiber of a predetermined length protrudes is assembled,
    The distal end portion extends in the first direction, the proximal end portion extends in a second direction substantially perpendicular to the first direction, and has a cylindrical ferrule projecting from the distal end portion in the first direction. A substantially L-shaped body;
    At the proximal end portion of the main body, the distal end portion of the optical fiber cable is held at a working position inclined by a predetermined angle from the ferrule axis toward the second direction and a use position along the second direction, respectively. Possible cable holding means ,
    The cable holding means holds the tip of the optical fiber cable so that the optical fiber strand bends in a predetermined direction at the working position, and the main body is provided when the optical fiber cable is held at the working position. that having a visible notch bending of the optical fiber, the optical connector.
  2. The optical connector according to claim 1,
    The body is
    A first housing portion formed along the first direction, and a second housing portion formed along the second direction and connected to a proximal end portion of the first housing portion, the use position being set on the inner side A housing having
    An optical connector, further comprising: a fixing portion that fixes a distal end portion of the optical fiber in the first housing.
  3. The optical connector according to claim 2,
    The cable holding means is
    A cable holding member rotatably attached to the second housing;
    The optical connector which has a control means which controls the rotation range of the said cable holding member between the said work position and the said use position.
  4. The optical connector according to claim 2 or 3,
    The fixing part is
    A pressure contact member that is installed in the first housing portion in the vicinity of the ferrule and applies a pressure contact force to the optical fiber in a state where the optical fiber penetrates the ferrule;
    An optical connector comprising: an operating member that is fitted into the first housing portion by an external pressing force and generates a pressing force by the pressing member.
  5. The optical connector according to claim 4,
    The main body further includes a guide portion provided in the housing adjacent to the fixing portion and guiding the optical fiber to the fixing portion;
    The guide portion is an optical connector in which an inner peripheral surface has a substantially conical shape and intersects an axis of the optical fiber cable at the working position.
  6. A method of manufacturing an optical connector with a cable, wherein an optical fiber cable from which an optical fiber strand of a predetermined length protrudes is assembled to an optical connector,
    The optical connector has a distal end portion extending in the first direction, a base end portion extending in a second direction substantially perpendicular to the first direction, and a cylinder projecting from the distal end portion in the first direction. A substantially L-shaped main body having a ferrule in shape, and a cable holding member that is attached to the base end portion of the main body and holds the front end portion of the optical fiber cable;
    Attaching a jig to the tip of the main body;
    While holding the cable holding member at a working position inclined at a predetermined angle from the axis of the ferrule in the second direction, the optical fiber strand is held until the tip of the optical fiber comes into contact with the end surface of the jig. Inserting a fiber strand into the main body and bending the optical fiber strand to the opposite side of the second direction;
    A step of visually checking the bending of the optical fiber through a notch provided in the main body;
    A method of manufacturing an optical connector with a cable, comprising: fixing a distal end portion of the optical fiber strand to the main body.
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JP2010266855A JP5755872B2 (en) 2010-11-30 2010-11-30 Optical connector and method for manufacturing optical connector with cable
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105278048A (en) * 2014-07-25 2016-01-27 鸿富锦精密工业(深圳)有限公司 Optical fiber connector assembling jig

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JP6199665B2 (en) * 2013-09-03 2017-09-20 株式会社フジクラ Optical connector assembling method and optical connector assembling jig

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Publication number Priority date Publication date Assignee Title
FR2586304B1 (en) * 1985-08-13 1987-12-18 Radiall Ind An apparatus for establishing, in reversible manner, a connection between two optical fibers, loose sheets and attachment device for this device, and method of preparing a fiber optic termination suitable
JPH09178981A (en) * 1995-12-22 1997-07-11 Fujikura Ltd Assembling jig and assembling method for multi-fiber optical connector
JP2005189332A (en) * 2003-12-24 2005-07-14 Three M Innovative Properties Co Optical connector, optical fiber with connector, optical fiber connecting apparatus and method for connecting optical fiber
JP5027789B2 (en) * 2008-12-03 2012-09-19 住友電気工業株式会社 Optical connector assembly method and optical connector
JP5497332B2 (en) * 2009-05-14 2014-05-21 スリーエム イノベイティブ プロパティズ カンパニー Optical connector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105278048A (en) * 2014-07-25 2016-01-27 鸿富锦精密工业(深圳)有限公司 Optical fiber connector assembling jig
CN105278048B (en) * 2014-07-25 2017-05-24 鸿富锦精密工业(深圳)有限公司 The fiber optic connector assembly fixture

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