JP2009265208A - Multiple optical adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple optical adapter capable of improving operability of inserting/ejecting a termination optical connector plug to/from each of insertion portions of various modules, and capable of keeping a distance between respective insertion portions at a minimum pitch distance, regarding a multi-branching structure of a compact, high-density termination optical cabinet. <P>SOLUTION: The multiple optical adapter is configured to enable inserting/ejecting the termination optical connector plug P to/from each of insertion portions 1a (1b) disposed through a partitioning wall 4, and includes a pair of right and left catching pieces 10 for fixedly catching the plug P in the inner depth part of the insertion portion 1a (1b). When the catching pieces 10 expand to the maximum with the operation of inserting/ejecting the termination optical connector plug P to/from the insertion portion 1a(1b), storage sections 5 for retracting the catching pieces 10, set to the minimum distance enough to prevent the adjacent catching pieces 10 from collide with each other, are respectively formed inside the partitioning wall 4, and inside the outer wall of both insertion portions located at right and left ends. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a multiple optical adapter such as a four-branch or eight-branch splitter module or a conversion core module in a small-sized and high-density indoor termination optical cabinet.

  Conventionally, an optical connector plug assembled at the end of a termination optical fiber is divided into two or more branches, for example, four branches by a splitter module which is a multiple optical adapter provided in a high-density optical termination termination cabinet. Are connected to an SC connector or the like arranged in a horizontal array.

  At this time, so that the two optical connector plugs for termination can be connected to each other, both ends of the multiple optical adapter made of a synthetic resin molded product, the optical axis coincides, one insertion portion, The other insertion portion is provided.

  The multiple optical adapter is formed by a horizontally long rectangular adapter housing in which an upper side wall, left and right side walls, and a bottom wall are integrated. In the case of four branches, three partition walls are interposed between the left and right side walls. Four rectangular tubular inserts are formed, and four SC connectors are arranged corresponding to each insert, and the connection opening ends of the one insert and the other insert are opened in the horizontal direction. is doing.

  As a specific configuration of this SC connector, one cylinder protrudes toward one connection opening end on one of a pair of left and right joining end walls arranged so as to partition the center portion of the adapter housing in the front and rear directions. In addition, the other cylinder is formed on the other joint end wall toward the other connection opening end, and both cylinders are aligned with the central axis on the optical axis, and the joint end walls are connected to each other via a fitting claw. The sleeve holder is formed by engaging and fixing. At this time, a cylindrical split sleeve is mounted and held inside the sleeve holder.

  Then, on both the left and right sides of both joint end walls, locking pieces each having a hook-like claw portion at the tip are provided so as to surround each end portion of both cylinders. The locking pieces are provided in pairs corresponding to the insertion portions, and the partition walls are disposed between the adjacent locking pieces. When the termination optical connector plug is inserted into the connection opening end of the insertion portion of the multiple optical adapter, the locking piece is slightly bent in the expanding direction by the front edge of the knob of the plug, and the sleeve holder of the SC connector When the ferrule is fitted to the hook, the hook is fixed by engaging the claw portion of the locking piece with the engaging recess provided on the outer periphery of the knob. Further, a key groove that is a straight groove along the optical axis direction is formed in the center of the upper side wall of each insertion portion in order to guide and stably hold the optical connector plug for termination.

  Incidentally, as is well known, as a specific configuration of the optical connector plug for termination, as is well known, a ferrule in which an optical fiber core wire is inserted and fixed and a flange is press-fitted and held at the rear end, and a ferrule abutting against the rear end of the flange A stop ring that supports the rear end of the spring that biases the front, a plug frame that covers these members, a caulking seat that secures the Kevlar, which is a tensile strength line of the optical cable, to the stop ring, and an outer side of the Kevlar of the optical cable A caulking ring that fixes a sheath, which is a synthetic resin skin, to the caulking seat, a boot that is attached to the stop ring, and a knob that covers the plug frame and the stop ring are generally configured.

In addition, a key projection having a substantially oval shape in a plane for fitting in the key groove provided at both opening ends of the connection in each insertion portion of the splitter module protrudes at the center of the upper surface of the upper wall of the knob, for example. It is installed.
nothing special

  However, conventionally, the locking pieces provided on the left and right sides of both joint end walls are provided in pairs corresponding to the respective insertion portions, and the partition is disposed between the adjacent locking pieces. Thus, when the optical connector plug for termination is inserted into the connection opening end of the insertion portion of the multiple optical adapter and the locking piece is bent in the expanding direction, the locking piece does not collide with the partition wall. For this reason, the space between the insertion portions of the multiple optical adapter is widened, which does not meet the recent demand for miniaturization and high density.

  Further, since the shape of each of the insertion portions of the rectangular tube shape is a vertical opening, it is very difficult to insert / remove the termination optical connector plug via the knob.

  Therefore, the present invention has been devised in view of the existing circumstances as described above. In a multi-branch structure in a small-sized and high-density optical cabinet for building termination, the present invention is configured to insert each module into each insertion portion. The insertion / removal operation of the optical connector plug for end can be improved, and at the same time, when the engagement piece is expanded to the maximum by the insertion / removal operation of the termination optical connector plug, the adjacent engagement pieces are mutually connected. It is an object of the present invention to provide a multiple-type optical adapter that can be set to a minimum distance that does not collide, so that the interval between the insertion portions can be kept within the minimum pitch interval.

  In order to solve the above-described problems, in the present invention, an optical connector plug for termination can be inserted into and removed from each insertion portion provided via a partition wall, and the plug is inserted into the inner back of each insertion portion. A multiple-type optical adapter comprising a pair of left and right locking pieces for locking and fixing the plug, and the locking pieces are expanded to the maximum by inserting / removing the termination optical connector plug into / from each insertion portion. When opened, a retaining portion for retracting a locking piece that can be set to a minimum distance so that adjacent locking pieces do not collide with each other is formed on the inner surface of the outer wall of the partition wall and both insertion portions at the left and right ends. It is characterized by comprising.

  By providing the jaw portion on the lower side of the insertion portion, the opening portion is formed to open obliquely upward at the connection opening end.

  According to the present invention, it is possible to improve the operability of inserting / extracting the optical connector plug for termination into each insertion portion of various modules in a multi-branch structure in a small-sized and high-density optical cabinet for termination. By making it possible to set the distance between adjacent locking pieces so that they do not collide with each other when the locking pieces are expanded to the maximum by inserting / removing the optical connector plug for the end, the interval between the insertion portions can be set. The minimum pitch interval can be accommodated.

  That is, the present invention provides a minimum distance so that adjacent locking pieces do not collide with each other when the locking pieces are expanded to the maximum by inserting / extracting the termination optical connector plug into / from each insertion portion. Since the holding portion for retracting the locking piece that can be set is formed on the inner surface of the outer wall of the insertion portion at both the partition wall and the left and right ends, the interval between the insertion portions can be kept within the minimum pitch interval. Therefore, it is possible to meet the recent demand for miniaturization and high density of various modules with a multi-branch structure.

  In addition, by providing an jaw portion below each insertion portion, both open ends for connection are formed so as to open obliquely upward, so in a small-sized and high-density optical termination optical cabinet. It is possible to easily and surely improve the operability of inserting / extracting the termination optical connector plug into / from each insertion portion of various modules in the multi-branch structure.

The best mode for carrying out the optical connector plug for termination according to the present invention will be described below in detail with reference to the drawings.
The optical connector plug P for termination assembled at the end of the optical fiber for termination is a small and high-density light for indoor termination as shown in FIGS. 6, 7A to 7C, and FIG. It is connected to an SC connector in a horizontal arrangement such as a four-branch of the splitter module SM, which is a multiple optical adapter as various modules provided in the cabinet.

  The splitter module SM as the multiple optical adapter may have an SC connector having, for example, an 8-branch horizontal arrangement, or a 2-branch, 4-branch, 8-branch vertical arrangement, or the like. . In addition to the splitter module SM, a conversion core module may be used.

  At this time, as shown in FIG. 1 to FIG. 6, the optical axes coincide with both ends of the splitter module SM made of synthetic resin so that two termination optical connector plugs P can be interconnected. Thus, one insertion portion 1a and the other insertion portion 1b are provided.

  That is, as shown in FIG. 1, the splitter module SM is formed by a horizontally long adapter housing 7 in which an upper side wall, left and right side walls, and a bottom wall are integrated. Four rectangular tube-shaped insertion portions 1a (1b) are formed through three partition walls 4. In addition, four SC connectors are arranged in the center corresponding to each insertion portion 1a (1b), and are shown in FIGS. 1, 3, 4, 6, 7A to 7C. As shown in the figure, at the opening end for connection in the one insertion portion 1a described above, the jaw portion 6 is provided on the lower side, so that each opening is directed obliquely upward.

  As shown in FIG. 5, the SC connector has a specific configuration in which one cylinder is connected to one of a pair of left and right joining end walls arranged so as to partition the center portion of the adapter housing 7 in the front-rear direction. Projecting toward the opening end, the other cylinder is formed on the other junction end wall toward the other connection opening end, and both cylinders are aligned with the central axis on the optical axis. The sleeve holder 8 is formed by engaging and fixing the walls together through fitting claws. At this time, a cylindrical split sleeve 9 is mounted and held inside the sleeve holder 8.

  And as shown in FIG. 5, the locking piece 10 provided with the hook-shaped nail | claw part at the front-end | tip is provided in the right-and-left both sides of both joining end walls so that each edge part of both cylinders may be enclosed, respectively. Yes. The locking pieces 10 are provided in pairs corresponding to the respective insertion portions 1a (1b), and the partition walls 4 are disposed between the adjacent locking pieces 10.

  Further, as shown in FIG. 5, each partition wall 4 is formed with a horizontally long slit-shaped accommodation portion 5 for retracting the locking piece 10 via a pair of left and right joining end walls, and each insertion portion 1a ( A retracting space is formed when the locking piece 10 is expanded to the maximum by inserting / removing the terminating optical connector plug P to 1b). At this time, as shown in FIG. 8, the accommodating portion 5 is set to a minimum distance that can be accommodated together so that the adjacent locking pieces 10 do not collide with each other, whereby the interval between the insertion portions 1 a (1 b) is set. The minimum pitch interval is set in the adapter housing 7. In addition, on the inner surface of the outer wall of both insertion portions at the left and right ends of the adapter housing 7, that is, on the inner wall side of the left and right side surfaces of the adapter housing 7, there are recessed groove accommodating portions formed corresponding to the accommodating portions 5 of the partition wall 4. 5, a retreat space for one locking piece 10 on each of both end sides is formed.

  As shown in FIGS. 1, 4, 6, and 7A to 7C, the optical connector plug P for termination is inserted in the center of the upper wall of each insertion portion 1a (1b). A plurality of key grooves 2 that are linear grooves along the optical axis direction are formed for the purpose of guiding and maintaining stability.

  Thus, as shown in FIG. 8, when each termination optical connector plug P is inserted into each connection opening end of each insertion portion 1a (1b) of the splitter module SM as a multiple optical adapter, The locking piece 10 is slightly bent in the expanding direction by the front edge of the knob Q of the plug P, and the adjacent locking pieces 10 are retracted into the accommodating portion 5 without interfering with each other. When the ferrule 13 of the termination optical connector plug P is fitted into the sleeve holder 8 of the SC connector, the engagement recess 11 provided on the outer periphery of the plug frame 16 protruding forward of the knob Q is engaged. It is fixed by engaging the claw at the tip of the stop piece 10.

  On the other hand, as a specific configuration of the termination optical connector plug P, as is well known, an optical fiber core wire a is inserted and fixed, and a flange 12 is press-fitted and held at the rear end, and the rear of the flange 12 A stop ring 15 that supports the rear end of the spring 14 that contacts the end and biases the ferrule 13 forward, a plug frame 16 that covers these members, and a Kevlar 18a that is a tensile strength line of the optical cable is fixed to the stop ring 15. A caulking seat 17, a caulking ring 19 for fixing the sheath 18, which is a synthetic resin sheath covering the outside of the optical cable Kevlar 18 a, to the caulking seat 17, a boot 20 attached to the stop ring 15, a plug frame 16 and a stop It is generally composed of a knob Q that covers the outside of the ring 15 (see FIG. 8).

  In the center of the upper surface of the upper wall of this knob Q, for example, a key having a substantially oval shape in a plane for fitting in the key groove 2 provided at both opening ends for connection in each insertion portion 1 of the splitter module SM. Although the protrusion 3 is provided in a protruding manner, an insertion / extraction operation portion having a rectangular plate shape may be integrally formed at the upper end of the key protrusion 3. The upper surface of the insertion / extraction operation part may be slightly raised, for example, in the shape of a double mountain in front and rear, and an anti-slip wave groove may be formed on the entire raised upper surface.

  1, 3, 4, and 7 (a) to 7 (c), a panel mounting protrusion 22 having screw mounting holes 21 on the left and right side surfaces of the adapter housing 7, and Locking spring pieces 23 for clamping the panel are provided on the front and rear sides of the projection 22.

  When connecting the termination optical connector plug P to the SC connector of the splitter module SM, as shown in FIG. 7A, first, the jaw portion 6 below the both opening ends for connection in one insertion portion 1a. 6 and FIG. 7B, the key projection 3 of the knob Q is inserted into the key groove 2 at the both opening ends of the connecting portions 1a (1b) of the splitter module SM as shown in FIGS. Fit while sliding horizontally. Accordingly, as shown in FIG. 7C, the termination optical connector plug P itself is connected to the splitter module SM via the key protrusion 3 fitted in the key groove 2 on the upper side wall of each insertion portion 1a (1b). It is kept stable.

  At this time, as shown in FIG. 8, the two left-side plugs P are accommodated without the locking pieces 10 being bent in the expanding direction by the front end periphery of the knob Q so that the adjacent locking pieces 10 do not interfere with each other. Each is retreated in the unit 5.

  Further, like the second plug P from the right side in FIG. 8, when the ferrule 13 is fitted to the sleeve holder 8 of the SC connector, it is provided on the outer periphery of the plug frame 16 protruding forward of the knob Q. The engagement recess 11 is fixed by engaging the claw portion at the tip of the locking piece 10.

  Further, like the plug P on the right side in FIG. 8, when the ferrule 13 is removed from the sleeve holder 8 of the SC connector, the locking piece 10 is bent in the expanding direction by the inner edge of the engaging recess 11. The adjacent locking pieces 10 are retracted into the accommodating portion 5 without interfering with each other.

It is a perspective view which shows an example of the splitter module as a multiple | multiplex type | mold optical adapter in the best form for implementing this invention. It is a front view of a splitter module similarly. It is a side view of a splitter module similarly. It is a top view of a splitter module similarly. It is a plane sectional view of a splitter module similarly. It is a top view which shows the state which similarly inserts the termination optical connector plug in the insertion part of a splitter module. Similarly, the procedure for inserting the optical connector plug for termination into the insertion portion of the splitter module is shown, (a) is a partially cutaway side view of the state before the knob is placed on the jaw portion, and (b) is a state where the knob is placed on the jaw portion. FIG. 5C is a partially cutaway side view of a state in which the optical connector plug for termination is connected to the insertion hole of the splitter module. It is a plane sectional view which shows the example of insertion / extraction operation | movement of the optical connector plug for termination to the insertion part of a splitter module similarly.

Explanation of symbols

P termination optical connector plug Q knob SM splitter module (multiple optical adapter according to the present invention)
a Optical fiber core wire 1a, 1b Insertion part 2 Key groove 3 Key protrusion 4 Bulkhead 5 Housing part 6 Jaw part 7 Adapter housing 8 Sleeve holder 9 Split sleeve 10 Locking piece 11 Engaging recess 12 Flange 13 Ferrule 14 Spring 15 Stop ring 16 Plug frame 17 Caulking seat 18 Sheath 18a Kevlar 19 Caulking ring 20 Boot 21 Screw mounting hole 22 Projection 23 Locking spring piece

Claims (2)

  The optical connector plug for termination can be inserted / removed into / from each insertion portion provided via a partition, and a pair of left and right locking pieces for locking and fixing the plug is provided in the inner back of each insertion portion. The adjacent locking pieces do not collide with each other when the locking pieces are expanded to the maximum by inserting / removing the termination optical connector plug into / from each insertion portion. A multiple-type optical adapter, characterized in that a retaining portion for retracting a locking piece that can be set to a minimum distance is formed on the inner surface of the outer wall of each of the insertion portions at the left and right ends.   The multiple optical adapter according to claim 1, wherein the multiple optical adapter is formed so as to be opened obliquely upward at an opening end for connection by providing an jaw portion below the insertion portion.

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