JP2006011196A - Optical fiber receptacle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a ferrule connecting section of an optical fiber at the position which is close to the center axis of a receptacle box and to store an optical fiber cable pulled out from a wall surface inside the wall buried receptacle box while maintaining a minimum allowable bending radius. <P>SOLUTION: An optical fiber receptacle device comprises a receptacle main body 2 which fits to a ferrule 5 that is mounted on an optical fiber P tip; a first holder section 3 which is to be attached to the receptacle main body 2 from one of the side surfaces in a sliding manner and forms curved guide groove section 8, that engages with the optical fiber P while its direction is changed, on a cylindrical surface section 9; and a second holder section 4 which is to be attached from the other side surface in a sliding manner and has an inner wall curved surface section 10 which abuts to the cylindrical surface section 9 of the first holder section 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an embedded optical fiber outlet device for providing a broadband service by optical communication.

  Conventionally, the optical fiber cable has a minimum allowable bending radius of about 30 mm, and the wall-embedded outlet width cannot be accommodated within about 44 mm. Recently, however, fiber optic cables have been developed that have a minimum allowable bend of less than half of that.

  Further, as disclosed in Patent Document 1, a cable guide for holding an optical fiber cable inside a body having a plug insertion port is provided with a predetermined distance from a mounting portion for mounting a receptacle, The cable guide is formed in an arc shape with a radius that matches the recommended minimum radius of the fiber optic cable, and the width of the cable guide is the same as the major radius of the cross section of the fiber optic cable routed inside the wall, In addition, a technique is provided in which the cable guide is provided with a protrusion for preventing a shift in the longitudinal direction of the optical fiber cable at the end on the receptacle housing side.

In addition, as disclosed in Patent Document 2, there is a technique in which the extra length portions of the first optical fiber cable and the second optical fiber cable are accommodated in the box-shaped protective member with a curvature exceeding the allowable minimum curvature. Is provided.
JP 2003-98383 A (see FIG. 3) JP-A-9-127369

  However, in the past, in order to realize an optical outlet composed of a passive lens system having mounting compatibility with that used for an electrical wiring outlet, first, an optical fiber fitting portion is an outlet box. It is necessary to come close to the center axis of the. Second, in order to process the tip of the optical fiber, it is necessary to accommodate the optical fiber cable drawn from the wall surface in the wall-embedded outlet box while ensuring the minimum allowable bending radius. If possible, it is desirable that a telephone jack, a TV antenna terminal, etc. can also be provided.

  Conventionally, when optical fiber cables are wired, the optical fiber drawn from the wall surface is stored only in the storage box in the storage box, so it must be handled with great care when storing the optical fiber. It could only be handled by a worker.

  Therefore, the present invention has been made in view of the conventional problems as described above, and can be set so that the ferrule connection portion of the optical fiber comes close to the center axis of the outlet box. An optical fiber that can accommodate an optical fiber cable drawn from the wall surface in a wall-embedded outlet box while ensuring the minimum allowable bending radius for tip processing, and can also be equipped with a telephone jack, TV antenna terminal, etc. An object is to provide an outlet device.

  In order to solve the above-described problems, in the present invention, an outlet body for fitting a ferrule attached to the tip of an optical fiber, and a slide attachment from one side to the outlet body, the direction of the optical fiber is changed. The first holder part formed by forming a curved guide groove part to be engaged with the cylindrical surface while being slid from the other side with respect to the insertion groove of the outlet body, and attached to the cylindrical surface of the first holder part And a second holder part having an inner wall curved surface part to be brought into contact with.

  The guide groove portion can be formed such that the direction of the optical fiber cable can be changed in the direction perpendicular to the connector connecting axis while protecting the core wire and ensuring the minimum allowable bending radius of the optical fiber.

  The guide groove is divided into four equal parts along the central axis and is arranged in a lateral direction, and the guide groove is provided on the cylindrical surface portion having a radius of curvature larger than the minimum allowable bending radius of the optical fiber. The pair of left and right ferrule connection portions of the main body may be formed in a pair of substantially meandering shapes at positions that are symmetrical to each other.

  The pair of left and right guide groove portions are branched in a substantially Y-shape from the middle, and two of the guide groove portions branched toward the inner side intersect with each other, and then each of them is branched toward the outer side. It can be formed by joining the guide groove portion.

  In the optical fiber outlet device according to the present invention configured as described above, the optical fiber is guided from the state where the ferrule attached to the tip of the optical fiber is pushed and fitted into the outlet body, and the guide groove portion of the first holder portion is inserted. By engaging with the optical fiber, it is possible to protect the optical fiber having an outer diameter of about 0.25 mm of the optical fiber which needs to be handled with care and to ensure a minimum allowable bending radius of the optical fiber while maintaining a plane perpendicular to the connector connecting axis. The direction of the optical fiber cable can be changed in the direction.

  According to the present invention, it is possible to set the ferrule connection portion of the optical fiber so as to be close to the center axis of the outlet box, and when processing the tip of the optical fiber, the optical fiber cable drawn from the wall surface is connected to the wall-embedded outlet box. It can be accommodated while ensuring a minimum allowable bending radius, and a telephone jack, a television antenna terminal, and the like can also be provided.

  That is, this is a curved main body in which the present invention is fitted with a ferrule attached to the tip of an optical fiber, and the outlet main body is slid from one side and engaged while changing the direction of the optical fiber. A first holder portion formed by forming a guide groove portion on a cylindrical surface, and an inner wall curved surface portion that is slidably mounted from the other side to the insertion groove of the outlet main body and is brought into contact with the cylindrical surface of the first holder portion. The second holder portion having the optical fiber cable with a simple and low-cost configuration while ensuring a minimum allowable bending radius in the wall-embedded outlet box and being not affected by external influences. Can be accommodated.

  The guide groove is formed so that the direction of the optical fiber cable can be changed in the direction perpendicular to the connector connecting axis while protecting the core wire and ensuring the minimum allowable bending radius of the optical fiber. The fiber ferrule connection can be set to be close to the center axis of the outlet box.

  The guide groove is divided into four equal parts along the central axis and is arranged in a lateral direction, and the guide groove is provided on the cylindrical surface portion having a radius of curvature larger than the minimum allowable bending radius of the optical fiber. Each pair of left and right ferrule connection parts of the outlet body is formed in a pair of substantially meandering shapes at symmetrical positions corresponding to the positions of the pair of left and right ferrule connection parts of the main body. In any of the connected optical fibers, the direction of the optical fiber can be easily changed in a state where the minimum allowable bending radius is ensured.

  The pair of left and right guide groove portions are branched in a substantially Y-shape from the middle, and two of the guide groove portions branched toward the inner side intersect with each other, and then each of them is branched toward the outer side. In any of the optical fibers connected to each of the pair of left and right ferrule connection portions of the outlet body, the optical fiber is connected to either the left or right direction of 90 ° with respect to the vertical direction. The direction can be changed.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the figure denotes an optical fiber outlet using a large-angle optical outlet corresponding to an optical indoor cable, an optical drop cable, or the like. The outlet body 2 having a pair of left and right ferrule connection portions 2A and 2B on one end side and the connector connection portion 2C on the other end side, and one side with respect to the ferrule connection portions 2A and 2B side of the outlet body 2 A first holder portion 3 that is slidably mounted from the side surface, and a second holder portion 4 that is slidably mounted from the other side surface to the ferrule connection portions 2A and 2B of the outlet body 2. , 4, the optical fiber P connected to the ferrule connection portions 2 </ b> A, 2 </ b> B of the outlet body 2 is sandwiched.

  That is, as shown in FIGS. 1 and 2, the outlet body 2 is formed in a substantially rectangular box shape as a whole, and a cylindrical ferrule 5 attached to the tip of the optical fiber P from which the cable jacket Q has been peeled off. Is selected from either one of the pair of left and right ferrule connection portions 2A and 2B, and is pushed in, for example, a modular jack to be connected. A ferrule 5 is connected to the other side of the pair of left and right ferrule connection portions 2A and 2B as necessary.

  Further, as shown in FIGS. 3 to 6, recessed insertion grooves 6 are formed in the left and right symmetrical portions of the edge portions on the ferrule connection portions 2 </ b> A and 2 </ b> B side of the outlet body 2. 4. Engagement portions 7 formed to face each other inwardly at the front end of a substantially U-shaped wall surface portion projecting to the lower side of each 4 are installed next to the insertion groove 6 after sliding from the side. The ferrule connection portions 2A, 2A, and 2B of the outlet body 2 are respectively engaged with the two engagement holes 6a and the open sides of the substantially U-shaped wall surfaces of the holder portions 3 and 4 are aligned with each other. The optical fiber P connected to 2B is clamped and fixed.

  As shown in FIGS. 5 and 9, the first holder portion 3 is a curve for engaging the optical fiber P portion connected to the ferrule connection portions 2A and 2B via the ferrule 5 while changing the direction thereof. A guide groove portion 8 is formed on the cylindrical surface portion 9. On the other hand, as shown in FIG. 5 and FIG. 10, the second holder portion 4 has an inner wall curved surface portion 10 for closely contacting the cylindrical surface portion 9 having the guide groove portion 8 of the first holder portion 3. And when the holder parts 3 and 4 are respectively slidably mounted and engaged with each other with respect to the insertion groove 6 of the outlet body 2, the cylindrical surface part 9 of the first holder part 3 and the second The inner wall curved surface portion 10 of the holder portion 4 is abutted and matched so that the optical fiber P engaged in the guide groove portion 8 is sandwiched and fixed.

  Both holder parts 3 and 4 have wedge-nail-like engaging protrusions 11a formed in the upper concave part 11 of the first holder part 3 and flexible protruding pieces formed on the upper side of the second holder part 4. 12 is fixed by a so-called patching stop that is engaged with an engagement hole 12A formed inside.

  As shown in FIGS. 3, 4, 5, and 9, the guide groove portion 8 of the first holder portion 3 is a cylindrical shape that is arranged sideways by dividing the cylindrical body into four equal parts along the central axis. On the surface portion 9, a total of four are formed in a pair of substantially meandering shapes at left and right symmetrical positions corresponding to the positions of the pair of left and right ferrule connection portions 2 </ b> A and 2 </ b> B of the outlet body 2. Yes. At this time, the guide groove portions 8 on the left and right sides are branched in a substantially Y shape from the middle, and the two guide groove portions 8B and 8C branched toward the inside of the guide grooves 8 intersect each other, The other guide grooves 8A and 8D branched toward the outside are joined. Further, the radius of curvature of the cylindrical surface portion 9 is greater than or equal to the minimum allowable bending radius of the optical fiber P. In this way, in any of the optical fibers P connected to the pair of left and right ferrule connection portions 2A and 2B of the outlet body 2, the optical fiber P is connected to either the left or right in the 90 ° horizontal direction with respect to the vertical direction. The direction can be changed to the direction.

  As shown in FIGS. 1 and 2, the ferrule 5 attached to the tip of the optical fiber P is pushed into and fitted into the ferrule connection portions 2A and 2B of the outlet body 2 as shown in FIGS. Further, by engaging the optical fiber P with the guide groove 8, the optical fiber P having an outer diameter of about 0.25 mm, which requires careful handling, is protected and the minimum allowable bending radius of the optical fiber P is reduced. While ensuring, the direction of the optical fiber cable can be changed in the direction perpendicular to the connection axis of the connector connecting portion 2C. As shown in FIGS. 6, 7, 8, and 9, both the holder portions 3, from the guide groove portion 8, are formed on the upper rear surface of the first holder portion 3 and the upper left and right side surfaces of the second holder portion 4. A downwardly protruding presser portion 13 is formed for pressing and fixing the cable jacket Q of the optical fiber cable drawn out to the four side surfaces.

  Further, as shown in FIGS. 5, 6, 7, and 8, each of the first holder portion 3 and the second holder portion 4 includes a portion with a gable jacket Q of an optical fiber cable, for example, A winding portion 14 for winding only one turn is provided so that the cable extra length can be accommodated in a substantially half space in a wall-embedded box (not shown). Thus, since the cable core wire is protected and is directed in the cable winding direction, the extra-length winding process can be easily performed only by the easy-to-handle portion with the cable jacket Q.

  Next, the assembly method in the above-described configuration will be described. First, as shown in FIGS. 1 and 2, the cable jacket Q of the optical fiber cable is peeled off and the tip thereof is attached to the ferrule 5, and then the outlet. The ferrule 5 is inserted and attached to the ferrule connection portions 2A and 2B of the main body 2.

  As shown in FIGS. 3 and 4, the first holder portion 3 is attached to the insertion groove 6 of the outlet body 2 by sliding mounting and fitting from one side surface. Then, by engaging the optical fiber P with any of the plurality of guide groove portions 8A to 8D, the optical fiber P is perpendicular to the connection axis of the connector connection portion 2C while ensuring the minimum allowable bending radius of the optical fiber P. After changing the direction of the optical fiber cable in the plane direction, the cable jacket Q is pushed into the holding portion 13 and temporarily fixed.

  Next, as shown in FIGS. 5 and 6, the second holder portion 4 is slid from the other side surface into the insertion groove 6 of the outlet body 2, and is formed in the recess 11 on the upper side of the first holder portion 3. The engaged protrusion 11a is locked and fixed to an engagement hole 12A inside the protruding piece 12 formed on the upper side of the second holder portion 4. At this time, the inner wall curved surface portion 10 of the second holder portion 4 is brought into contact with the cylindrical surface portion 9 of the first holder portion 3 without any gap, and is engaged in the guide groove portion 8. The optical fiber P is firmly clamped and fixed. Finally, after the portion with the gable jacket Q is pressed and fixed to the holding portion 13 on the second holder portion 4 side, it is wound around the winding portion 14 for, for example, one turn, and then inside the wall-embedded box (not shown) Press to fix.

It is a perspective view which shows the state which inserted the ferrule in the outlet socket body in the best form for implementing this invention. It is a partially cutaway sectional view showing a state where the ferrule is also inserted into the outlet body. It is a perspective view which shows the state which similarly attaches a 1st holder part to an outlet socket main body. It is a perspective view which shows the state which similarly attaches a 1st holder part to an outlet socket main body, and engages an optical fiber with a guide groove part. It is a perspective view which shows the state which attaches a 2nd holder part after engaging an optical fiber with a guide groove part similarly. It is a perspective view which shows the state after completion | finish of assembly | attachment of both holder parts similarly. It is the longitudinal cross-sectional view seen from the diagonal direction which shows the state after completion | finish of assembly similarly. It is a longitudinal cross-sectional view which shows the state after completion | finish of assembly similarly. An example of a 1st holder part is shown, (a) is a perspective view, (b) is a top view, (c) is a side view, (d) is a front view. An example of a 2nd holder part is shown, (a) is a perspective view, (b) is a top view, (c) is a side view, (d) is a front view.

Explanation of symbols

P Optical fiber Q Cable jacket 1 Optical fiber outlet device 2 Outlet body 2A, 2B Ferrule connection part 2C Connector connection part 3 First holder part 4 Second holder part 5 Ferrule 6 Insertion groove 7 Engagement part 8 (8A, 8B, 8C, 8D) Guide groove portion 9 Cylindrical surface portion 10 Inner wall curved surface portion 11 Engagement projection portion 12 Projection piece 12A Engagement hole portion 13 Presser portion 14 Winding portion

Claims (4)

  An outlet body that fits a ferrule attached to the tip of the optical fiber and a curved guide groove that engages the optical fiber while changing its direction are formed on the cylindrical surface. And a second holder part having an inner wall curved surface part that is slidably mounted on the insertion groove of the outlet main body from the other side surface and is brought into contact with the cylindrical surface of the first holder part. An optical fiber outlet device comprising:   2. The optical fiber according to claim 1, wherein the guide groove portion is formed so that the direction of the optical fiber cable can be changed in a direction perpendicular to the connector connecting axis while protecting the core wire and ensuring a minimum allowable bending radius of the optical fiber. Outlet device.   The guide groove portion is divided into four equal parts along the central axis and is disposed laterally, and the guide groove portion is a cylindrical surface portion having a radius of curvature greater than or equal to the minimum allowable bending radius of the optical fiber. The optical fiber outlet device according to claim 1 or 2, wherein the optical fiber outlet device is formed in a pair of substantially meandering shapes at symmetrical positions corresponding to the positions of the pair of left and right ferrule connections. The pair of left and right guide groove portions are branched in a substantially Y-shape from the middle, and two of the guide groove portions branched toward the inner side intersect with each other, and then each of them is branched toward the outer side. The optical fiber outlet device according to any one of claims 1 to 3, wherein the optical fiber outlet device is joined to the guide groove portion.

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