JP2019020461A - Optical connector plug prevention tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for preventing accidental disconnection of an optical connector plug, which can avoid a large data loss due to interruption of optical fiber communication by preventing accidental disconnection of the optical connector plug with respect to an adapter. SOLUTION: The erroneous detachment prevention tool 2 is formed by a frame member such as a substantially U-shape so as to be detachably attached and held on the outer surface of a coupling 13, and is provided with a stopper portion 4 formed at the rear end. There is. Then, by holding the stopper portion 4 in contact with the rear end of the housing 18 or the front portion of the spring push 11, the coupling 13 is held in the forward position, the backward movement of the coupling 13 is prevented, and the plug main body with respect to the adapter 21 is prevented. It is configured to prevent the pulling out of 1. [Selection diagram] Fig. 1

Description

  The present invention provides an optical connector plug that can prevent an optical connector plug (hereinafter abbreviated as a plug body) of an MPO type push-pull system connected to an optical connector adapter (hereinafter abbreviated as an adapter) from being accidentally detached. It relates to a preventive tool.

  In recent years, it has become essential to increase the density of communication devices in various data centers and the like, and a form in which a plurality of optical fiber cores are mounted on one of the plug bodies has become widespread.

  As a plug main body that connects switch-shaped optical fiber core wires (so-called optical fiber tape core wires) in a switchable manner, for example, an optical connector ferrule (so-called MT type optical connector) established in the JIS-C5981 standard or the like Is provided.

  In recent years, in view of improving the connection workability of the optical connector ferrule, an optical connector having a structure in which a so-called MPO connector (multi-fiber optical connector ferrule established in JIS-C5982 standard etc. is housed in a plastic housing is provided. ) Is provided.

  Conventionally, the MPO-type plug body 1 houses a ferrule 12 attached to the tip of the optical fiber ribbon FT at the tip (front end) of a sleeve-like housing 18 as shown in FIGS. ing. The housing 18 is provided with a spring 15 that elastically biases the ferrule 12 toward the front side of the plug body 1.

  Further, the MPO-type plug body 1 is provided so as to be slidable within a movable range secured in the axial direction with respect to the housing 18 and a housing 18 with a spring housing recess 17 fitted on the housing 18. And a cylindrical coupling 13 elastically biased toward the front side of the plug body 1 by a spring 16 housed in the recess 17 of the housing 18 and the front end of the housing 18 where the ferrule 12 is provided. And a spring push 11 attached to the rear end portion.

  A boot 19 is attached to the rear end of the spring push 11, and a key protrusion K2 (see FIGS. 3 and 4) is formed on the outer surface of the front end (front end) of the housing 18.

  The insertion of the plug body 1 into the adapter 21 is performed by the operator pressing a part of the plug body 1 located on the rear side from the coupling 13, for example, the boot 19, with the finger toward the adapter 21. Yes.

  On the other hand, the plug body 1 is removed from the adapter 21 by pulling the coupling 13 toward the boot 19 against the elastic biasing force of the spring 16.

nothing special

  However, since the conventional MPO-type plug body does not have a function for preventing the coupling from moving backward after connection to the adapter, the locking of the adapter may occur when the coupling is moved backward by mistake. There is a possibility that the locking to the portion is released and the plug body is pulled out.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and prevents large disconnection of the plug body with respect to the adapter, thereby enabling a large amount of data due to interruption of optical fiber communication. An object of the present invention is to provide an optical connector plug mis-detachment preventive tool that can avoid loss.

  In order to solve the above-described problems, in the present invention, a ferrule, a housing that houses the ferrule at the tip, and a slidable outer fit in the front-rear direction with respect to the housing, and always forward An elastically biased coupling, and a spring push inserted in the rear end of the housing, and the locking of the elastic locking portion inside the adapter is maintained by moving the coupling forward; An optical connector plug mis-detachment preventive device that is unlocked and can be pulled out with respect to the elastic locking portion inside the adapter, and this mis-detachable preventive device is detachably mounted on the outer surface of the coupling. And a stopper portion projecting from the rear end, and the stopper portion is connected to the rear end of the housing or the spring. And held at the forward position of the coupling by contact held in front of the Gupusshu characterized by blocking the backward movement of the coupling.

  A locking protrusion is provided on the rear end of the coupling, to which a stopper protruding from the rear end of the accidental disconnection prevention device is locked, while being attached to the optical connector at the rear end of the housing or the front of the spring push. Further, when the coupling is held at the forward position of the housing, a locking projection for hooking a finger or a removal tool and forcibly moving the coupling backward is provided.

  The misplacement preventive tool is formed by a substantially U-shaped frame member by an upper wall surface portion, a right wall surface portion, and a left wall surface portion.

  The stopper part of the accidental removal prevention tool is formed by a claw that is bent obliquely downward at the rear end of the erroneous removal prevention tool.

  A notch portion is provided in the center of the claw forming the stopper portion, and the rear end of the housing or the locking projection at the front portion of the spring push is formed in the notch portion so as to be movable backward through a finger or a removal jig.

  The locking projection at the rear end of the coupling is formed higher than the locking projection at the rear end of the housing.

  According to the present invention, it is possible to avoid a large amount of data loss due to interruption of optical fiber communication by preventing the plug body from being accidentally detached from the adapter.

  That is, in the present invention, a ferrule, a housing that houses the ferrule at the tip, a coupling that is slidably fitted in the front-rear direction with respect to the housing, and that is always elastically urged forward, A spring push inserted in the rear end of the housing, and the coupling advances to hold the elastic locking portion inside the adapter, and the backward movement locks to the elastic locking portion inside the adapter. Is an optical connector plug mis-detachment preventive tool that is released and can be pulled out, and this preventive tool is formed by a frame member so as to be detachably mounted on the outer surface of the coupling, and A stopper is provided at the end, and the stopper is kept in contact with the rear end of the housing or the front of the spring push. By holding the coupling in the forward position, the backward movement of the coupling is prevented, so that it is possible to prevent the plug body from being erroneously pulled out of the adapter after connection to the adapter. And various plug security systems can be constructed.

  A locking protrusion is provided on the rear end of the coupling, to which a stopper protruding from the rear end of the accidental disconnection prevention device is locked, while being attached to the optical connector at the rear end of the housing or the front of the spring push. Further, when the coupling is held at the forward position of the housing, a locking projection for hooking a finger or a removal tool and forcibly moving the coupling backward is provided. By forcibly moving the coupling backward, the tip of the stopper portion of the accidental removal preventive device rides on the locking protrusion of the rear end of the housing or the front of the spring push, and the locking by the stopper portion is released. Both the locking protrusions are in contact with each other, so that even if the accidental prevention device is still attached to the coupling of the plug body, Withdrawal of the plug body can be performed smoothly.

  The accidental removal prevention tool is formed by a substantially U-shaped frame member by the upper wall surface portion, the right wall surface portion, and the left wall surface portion, so that it can be easily removed by one-touch operation on the outer surface of the coupling. You can wear preventive tools.

  Since the stopper portion of the accidental removal prevention tool is formed by a claw that is bent obliquely downward at the rear end of the erroneous removal prevention tool, the rear end of the housing of the optical connector or the front part of the spring push The locking projection provided on the coupling is smoothly and reliably abutted and held, and the erroneous removal prevention tool for the coupling is securely attached.

  A notch is provided in the center of the claw that forms the stopper, and the rear end of the housing or the locking protrusion at the front of the spring push is formed in the notch so as to be movable backward through a finger or a removal jig. As a result, the coupling can be easily and reliably slid in a state where the accidental removal prevention tool is mounted on the connector body.

  Since the locking projection at the rear end of the coupling is formed higher than the locking projection at the rear end of the housing, the front end of the stopper of the accidental removal preventer is located at the rear end of the housing or the front part of the spring push. When the locking protrusions are run up and the locking protrusions abut, the stopper is locked and held by the locking protrusion at the rear end of the coupling or the front part of the spring push. When the plug body is pulled out of the connector, it is possible to prevent the loss due to the accidental removal of the preventive tool from the coupling. Moreover, after the plug body is pulled out of the adapter, the coupling elastically moves forward and returns, so that the stopper portion is automatically brought into the original state where it is held in contact with the rear end of the housing or the front portion of the spring push. Can do.

It is a perspective view which shows an example of the accidental removal prevention tool in one form for implementing this invention. 2, (a) is a front view, (b) is a rear view, (c) is a plan view, (d) is a bottom view, (e) is a left side view, and (f) is a right side view. It is a perspective view which shows the state before mounting | wearing to the plug main body of an accidental removal prevention tool. It is a perspective view of the state before connecting the plug main body equipped with the accidental removal prevention tool to an adapter. It is a perspective view of the state which connected the plug main body equipped with the erroneous removal prevention tool to the adapter. In FIG. 5, (a) is a cross-sectional view of the plug main body when the plug main body equipped with the accidental removal prevention tool is connected to the adapter, and (b) is a coupling retracted through the notch of the accidental prevention prevention tool. Sectional drawing (c) of a state is sectional drawing which shows the other example which provided the latching protrusion which the stopper part of an accidental removal prevention tool latches in the spring push. In FIG. 6, (a) is a cross-sectional view of a state where a plug main body equipped with an accidental prevention device is connected to the adapter, and (b) is a cross-section of a state where the coupling is retracted through a notch of the accidental prevention device. FIG. 4C is a cross-sectional view of the state where the accidental prevention device is removed. In FIG. 7, (a) is a cross-sectional view of a state in which the plug body with the accidental prevention device attached is connected to the adapter, and (b) is the coupling body retracted after removing the accidental prevention device and the plug body is removed from the adapter. It is sectional drawing of the state extracted. It shows the usage example of the extraction jig, (a) is a perspective view of the state before using the extraction jig, (b) is extracted to the locking projection of the coupling through the notch of the accidental removal prevention tool It is a perspective view of the state which hooked the hook nail | claw of the jig | tool.

  Hereinafter, an embodiment of a protective cap for an optical connector plug according to the present invention will be described in detail with reference to the drawings.

<Configuration of optical connector plug>
The plug body 1 according to the present invention is configured by an MPO type push-pull system. That is, as shown in FIGS. 6, 7, and 8, the plug body 1 includes a ferrule 12 attached to the tip of the optical fiber ribbon FT, and a sleeve-like housing 18 that houses the ferrule 12 at the tip. The cylindrical coupling 13 provided so as to be slidable within a movable range secured in the axial (front-rear) direction with respect to the housing 18 and the ferrule 12 housed in the housing 18 are elastically moved to the front side of the optical connector. A spring 15 that biases, a spring 16 that is housed in a recess 17 provided between the coupling 13 and the housing 18 and elastically biases the coupling 13 toward the front side of the housing 18, and the housing 18 The spring push 1 inserted inside the rear end opposite to the front end where the ferrule 12 is provided When, and a boot 19 fitted to the spring push 11.

  Further, as shown in FIGS. 6, 7 and 8, the plug body 1 connected to the adapter 21 is slid forward (advanced) by the coupling 13 attached to the outer surface of the plug body 1 so as to be slidable back and forth. The housing 18 that is locked by the elastic locking portion 22 that protrudes from the left and right inner walls of the adapter 21 toward the opening side is held unremovable, and the coupling 13 is slid backward (retracted) to thereby move the adapter 21. The housing 18 is disengaged from the elastic locking portion 22, and the plug body 1 is removed from the adapter 21.

  That is, when the distal end side of the housing 18 of the plug body 1 is inserted into the adapter 21, the distal end of the coupling 13 is pushed by the elastic locking portion 22 provided inside the adapter 21, and then retracts once. The elastic locking portion 22 has an elastic restoring force after the locking protrusion 22a formed on the inner surface of the front end of the elastic locking portion 22 passes over the locking convex portion 31 protruding from the front end of the housing 18 via the hook portion 31a. It works and bites into and engages with the catch portion 31a.

  At this time, the coupling 13 is constantly urged to the front side of the housing 18 by the spring 16 housed in the recess 17 of the housing 18 while being locked to a spring stopper 13b provided in the front portion of the lower portion. The coupling 13 slides forward and the outer surface of the elastic locking portion 22 of the adapter 21 is shielded and held by the inner surface of the distal end of the coupling 13 so that the housing 18 of the plug body 1 cannot be removed. To. A key groove K1 is formed along the sliding direction on at least one of the upper and lower inner surfaces of the coupling 13, and the key protrusion K2 of the housing 18 is engaged with the key groove K1 (see FIG. 3). 3 is a guide pin inserted into the ferrule 12, and is fitted into a guide pin hole of a not-shown counterpart ferrule to position the ferrule 12 (the optical fiber between the optical fiber tape cores FT). Axis alignment is performed.

  When the plug body 1 is removed, the coupling 13 is moved rearward in a state where the locking protrusion 22a of the elastic locking portion 22 of the adapter 21 is engaged with the hook portion 31a at the tip of the housing 18. Slide to. At this time, the hook portion 31a in a state where the locking protrusion 22a is engaged is exposed to the outside. Then, by pulling out the plug body 1, the locking projection 22 a of the elastic locking portion 22 engaged with the hook portion 31 a of the housing 18 gets over the locking projection 31 at the tip of the housing 18. . As a result, the locking projection 22 a is released upward from the gap between the housing 18 of the plug body 1 and the coupling 13, and at the same time, the coupling 13 is slid back to the front by the spring 16.

<Configuration of accidental prevention device>
The accidental removal preventing tool 2 according to the present embodiment is erroneously pulled out even though it is not necessary to pull out the plug body 1 for an MPO type optical connector according to, for example, JIS-C5982 standard, which is attached to the adapter 21 for the optical connector. It is formed by a substantially U-shaped frame member made of synthetic resin so as to be detachably mounted on and held on the outer surface of the coupling 13 of the plug body 1.

  That is, as shown in FIGS. 1 and 2, (a) to (f), and FIGS. 3 to 5, the erroneous removal prevention tool 2 is constituted by an upper wall surface portion 2a, a left wall surface portion 2b, and a right wall surface portion 2c. The entirety is formed of a substantially U-shaped frame member, and the lower tip ends of the left and right side wall surface portions 2b and 2c are slightly curved toward each other. Incidentally, the four portions of the joint portion of the left and right side wall surface portions 2b, 2c and the upper wall surface portion 2a and the curved portion at the lower end of the left and right side wall surface portions 2b, 2c are both formed with a slight thickness in order to increase the holding force to the plug body 1. Has been.

  In addition, the erroneous prevention device 2 has slits 3 formed at the corners of the upper wall surface portion 2a and the left wall surface portion 2b, and at the corner portions of the upper wall surface portion 2a and the right wall surface portion 2c. A stopper portion 4 projects from the rear end.

  The stopper portion 4 is formed by a claw 4a that protrudes obliquely downward toward the rear end of the accidental escape prevention device 2. Further, a substantially U-shaped notch 5 is provided in the center of the claw 4a. In this way, a pair of the claws 4a is formed on the left and right sides of the rear end of the accidental prevention device 2 with a predetermined distance between the slits 3 at both ends and the notch 5 at the center.

  Further, the accidental prevention device 2 is formed of a substantially U-shaped frame member made of a synthetic resin having elasticity. As shown in FIG. 3, the outer surface of the coupling 13 of the plug body 1 is used. Is attached and held from above. That is, in the state where each of the left and right side wall surface portions 2b and 2c is once bent and attached to the coupling 13 and covers the outer surface of the coupling 13, the lower front end sides of the left and right side wall surface portions 2b and 2c are mutually connected. Return to the inside and hold the lower surface of the coupling 13 firmly.

  On the other hand, the claw 4a is held in contact with a locking projection 18a formed at the rear end of the upper surface of the housing 18 to hold the coupling 13 in an advanced position, whereby an elastic locking portion of the adapter 21 is obtained. The plug main body 1 is locked with respect to 22 so as to be prevented from being pulled out (see FIGS. 5 and 6A).

  More specifically, at this time, a locking projection 13a is formed upright at the rear end of the upper surface of the coupling 13 so as to face the locking projection 18a provided above the rear end of the housing 18. Even if the locking projection 13a is covered from above with the claw 4a of the accidental prevention device 2, the finger or the later-described removal is performed on the locking projection 13a of the coupling 13 through the central notch 5. The coupling 13 can be forcibly moved backward by hooking the jig S (see FIG. 9). Thus, after the plug body 1 is pulled out from the adapter 21, the spring 13 or the unloading jig S described later is released from the locking projection 13a, so that the coupling 13 is locked to the spring stopper 13b. 16, the claw 4a is automatically brought into contact with and held by the locking projection 18a at the front end of the housing 18 (see FIG. 6A).

  Thus, since the locking projection 13a at the rear end of the coupling 13 is disposed higher than the locking projection 18a at the rear end of the housing 18, the locking projection 18a of the housing 18 is located inside the locking projection 18a. When the locking projection 13a of the coupling 13 hits, the claw 4a rides on the locking projection 13a at the rear end of the coupling 13 and is elastically held (see FIG. 6B).

  On the other hand, when the erroneous removal prevention tool 2 is removed from the plug body 1, the holding of the coupling 13 at the forward movement position is released, and the coupling 13 can be retracted. Thus, by retracting the coupling 13, the plug body 1 is unlocked from the elastic locking portion 22 of the adapter 21 and can be pulled out (see FIG. 8B).

  As shown in FIGS. 9A and 9B, the extraction jig S is formed by bending a long strip piece S2 into a U shape to give elasticity, Is configured by projecting a hook arm S1 to be hooked on the locking projection 13a of the coupling 13 so as to face each other.

  Next, an example of use / operation of the configuration configured as described above will be described.

  First, as shown in FIGS. 7A and 7B, when the distal end side of the housing 18 of the plug body 1 is forcibly inserted into the adapter 21, the coupling 13 is caused by the elastic locking portion 22 of the adapter 21. The front end is pushed, and the coupling 13 is once retracted while pushing the claw 4a constituting the stopper portion 4 of the erroneous removal prevention tool 2 upward.

  Thus, as shown in FIG. 8 (a), the elastic locking portion 22 of the adapter 21 has a locking projection 22a formed on the inner surface of the front end thereof protruding from the front end of the housing 18 via the hook portion 31a. After getting over the locking projection 31, the locking portion 31 a is firmly caught and locked.

  Thus, the coupling 13 is locked to the spring stopper 13b, and is always urged to the front side of the housing 18 by the spring 16 accommodated in the recess 17, so that it slides back to the front, and the erroneous removal The claw 4a of the preventer 2 is held in contact with the locking projection 18a of the housing 18 so that the coupling 13 is held in the forward position. At this time, the outer surface of the elastic locking portion 22 of the adapter 21 is shielded and held by the tip portion of the coupling 13, and at the same time, the plug body 1 is locked to the elastic locking portion 22 of the adapter 21 to prevent pulling out. (See FIG. 5, FIG. 6 (a) and FIG. 8 (a)).

  When the plug body 1 is removed, as shown in FIGS. 6A and 7B, the claw 4a of the accidental removal preventer 2 abuts against the locking projection 18a of the housing 18. From the state in which the coupling 13 is held in the forward position, the coupling 13 is locked through the notch 5 of the accidental prevention device 2 as shown in FIGS. 6 (b) and 7 (b). A finger or a hook arm S1 (see FIG. 9) of the removal jig S is hooked on the protrusion 13a to forcibly move the coupling 13 backward.

  When the coupling 13 is forcibly moved backward (sliding the coupling 13 backward), the hook portion 31a in the state in which the locking protrusion 22a of the elastic locking portion 22 of the adapter 21 is engaged is exposed. In this state, when the plug body 1 is forcibly pulled out, the locking protrusion 22a of the elastic locking portion 22 engaged with the hook portion 31a gets over the locking projection 31 and is released. Thereafter, the coupling 13 is slid back to the front by the spring 16.

  In addition, after the plug body 1 is pulled out from the adapter 21, the finger 13 or the removal jig S is released from the locking projection 13 a of the coupling 13, so that the coupling 13 is elastically moved back by the spring 16. Then, the pawl 4a of the accidental removal preventing device 2 is automatically brought into contact with and held by the locking projection 18a at the front end of the housing 18. In this way, the plug main body 1 can be removed even with the erroneous removal prevention tool 2 attached.

  Further, as shown in FIG. 8 (b), by removing the accidental prevention device 2 from the plug main body 1, the holding of the coupling 13 at the advanced position is released, and the coupling 13 is retracted. The plug body 1 can also be pulled out. In this case as well, the locking protrusion 22a engaged with the catching portion 31a of the housing 18 gets over the locking projection 31 and is released, and at the same time, the coupling 13 is slid forward by the spring 16 and as a result. The plug body 1 can be removed.

  By the way, in the above embodiment, all the locking projections 18a are integrally formed at the rear end of the housing 18, but as shown in FIG. It may be formed integrally with a little forward.

  Further, in the above embodiment, the claw 4a constituting the stopper portion 4 of the accidental removal preventing device 2 is formed to bend obliquely downward at the rear end of the preventing device. It is not limited to such a configuration as long as it has a stopper function capable of preventing retreat.

FT Optical fiber ribbon K1 Key groove K2 Key protrusion S Removal jig S1 Hook arm S2 Strip piece G Guide pin 1 Plug body 2 Accidental prevention tool 2a Upper wall surface portion 2b Left wall surface portion 2c Right wall surface portion 3 Slit 4 Stopper Part 4a Claw 5 Notch 11 Spring push 12 Ferrule 13 Coupling 13a Locking protrusion 13b Stopper 15 Spring 16 Spring 17 Recess 18 Housing 18a Locking protrusion 19 Boot 21 Adapter 22 Elastic locking part 22a Locking protrusion 31 Locking Convex part 31a Hook part

Claims (6)

  A ferrule, a housing that houses the ferrule at the tip, a coupling that is slidably fitted to the housing in the front-rear direction, and is always elastically urged forward, and is inserted into the rear end of the housing. The above-mentioned spring push is provided, and when the coupling moves forward, the locking to the elastic locking portion inside the adapter is held, and by moving backward, the locking to the elastic locking portion inside the adapter is released and can be pulled out The optical connector plug is designed to be prevented from being accidentally detached, and is formed by a frame member so as to be detachably mounted on the outer surface of the coupling, and a stopper portion projects from the rear end. And the stopper is held in contact with the rear end of the housing or the front part of the spring push. Godatsu preventing device of an optical connector plug, characterized in that to prevent the backward movement of the coupling to hold the coupling in the forward position.   A locking protrusion is provided on the rear end of the coupling, to which a stopper protruding from the rear end of the accidental disconnection prevention device is locked, while being attached to the optical connector at the rear end of the housing or the front of the spring push. 2. A locking projection for forcibly moving the coupling backward by hooking a finger or a removal tool when the coupling is held at the forward position of the housing. Prevents accidental removal of optical connector plugs.   2. The optical connector plug erroneous removal prevention device according to claim 1, wherein the erroneous removal prevention device is formed by a substantially U-shaped frame member by an upper wall surface portion, a right wall surface portion, and a left wall surface portion.   The optical connector plug accidental removal prevention device according to claim 1, wherein the stopper portion of the erroneous removal prevention tool is formed by a claw bent obliquely downward at a rear end of the erroneous removal prevention tool.   A notch portion is provided in the center of the claw forming the stopper portion, and a locking protrusion of the rear end of the housing or the front portion of the spring push is formed in the notch portion so as to be movable backward through a finger or a removal jig. 4. A tool for preventing accidental removal of the optical connector plug according to 4.   3. The optical connector plug misplacement prevention device according to claim 2, wherein the locking projection at the rear end of the coupling is formed higher than the locking projection at the rear end of the housing.

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