JP2013029580A - Optical connector plug wrong demounting prevention tool - Google Patents

Abstract

An object of the present invention is to completely cover a pressing operation lever of an LC type optical connector plug having a latch means, to prevent the pressing operation lever from falling off, and to perform a latch release operation erroneously. Make sure it can be prevented.
An optical connector plug having a latch means includes a preventer main body for preventing an accidental removal of a plug main body due to an erroneous operation of a pressing operation lever for pressing a latch piece. Includes a lever protection part 2 that covers and protects the pressing operation lever 12 from above on the plug body P, and a boot holding part 3 that extends rearward from the lever protection part 2. The lever protection part 2 is formed by a U-shaped enclosure having a lower opening, and is provided with holding projections 4 that hold the pressing operation lever 12 on both the left and right sides on the inner surfaces of the left and right side walls.
[Selection] Figure 3

Description

  The present invention provides an optical connector plug error prevention device for preventing a communication failure caused by accidentally disconnecting an optical connector plug relating to an important line of an optical fiber communication network in an exchange station or a data center from an adapter. It relates to a removal prevention tool.

  2. Description of the Related Art In recent years, an MT-RJ optical connector having a basic structure of an MT connector developed for a network device with an increase in information transmission capacity is provided with a latch means for maintaining a connection that can be easily attached and detached.

  A conventionally known MT-RJ optical connector includes a plug connector connected to an optical fiber ribbon or the like, and a connector adapter attached and fixed to a patch panel or the like. The plug connector is configured such that an MT ferrule with a mechanical splice is accommodated in a plug housing, and a boot for protecting the introduction portion of the tape core wire is disposed at the rear.

  The plug housing has a bulging portion on the rear side thereof, and is formed by integrally providing a latch arm in a cantilever shape from one surface of the bulging portion, and the latch arm has a free end portion. Has a latch protrusion whose front surface is an inclined surface, and a pressing portion that elastically displaces the latch arm by pressing at the base portion.

  When the plug connector is removed from the connector adapter, the pressing portion is pushed with a finger, the latch arm is elastically displaced and the latch protrusion is lowered so as to be released from the latch engagement hole, the engagement is released, and the plug connector is removed. It can be easily removed by pulling it forward.

  However, in an optical connector device in which optical connectors are arranged at high density on a patch panel or the like, it is easy to touch other adjacent plug connectors because it is small when trying to remove a certain plug connector. The pressing portion of the latch arm of the connector may be pushed. This mistaken disconnection is likely to occur particularly in a connector used for a LAN or the like in which optical transmission lines are provided with high density.

  Therefore, in such a conventional MT-RJ optical connector, as disclosed in Patent Document 1, there has already been proposed an optical connector erroneous removal prevention member for preventing the latch means from being released accidentally. ing. The optical connector error prevention member has a latch protection part and a connector holding part as basic components, and is additionally provided with a tilt prevention piece that prevents the optical connector error prevention member from falling down due to pressing. .

  That is, the latch protection part is formed in a structure in which the hand does not directly touch the pressing part of the plug connector when the optical connector error prevention member is pushed forward by hand. The connector holding portion is configured so that the side wall surface does not protrude from the outer surface of the housing of the connector adapter, is fitted to the front portion of the boot of the plug connector, and is held by the frictional force.

Japanese Patent Laid-Open No. 2002-40287

  However, in the past, there has been little demand for erroneous prevention devices for single- or double-core LC type optical connector plugs having latch means other than MT-RJ optical connectors, and so far have been developed. It was not. In recent years, as the use of such LC type optical connector plugs in exchange offices, data centers, and the like has progressed, the demand for such optical connector plug erroneous removal prevention tools has gradually increased.

  By the way, the LC type optical connector plug having a conventional latch means has a push operation lever obliquely projected from the front of the boot of the plug body incorporating a ferrule, a ferrule holder, a coil spring and the like, and the tip of the plug body is opposed to this. Latch pieces are provided obliquely from the rear to the rear, and the latch pieces are engaged with the pressing operation lever at their tips. The pressing operation lever is displaced toward the plug main body to displace the latch piece in a direction approaching the plug main body. Thus, the latch piece is engaged with the housing of the adapter.

  On the other hand, the plug body is inserted by simply pushing it in from the front or rear of the housing of the adapter, and is inserted along the inner wall of the housing by elastically bending the latch piece. Then, the latch piece is elastically restored at the position reaching the latch engagement hole of the housing, and is engaged with the latch engagement hole in a snap-in manner, and the plug body is engaged. Thus, the plug main body inserted from the front part and the rear part of the housing of the adapter forms an optical connection at the center of the housing with the end faces of the optical fibers colliding with each other.

  However, the latch means of such an LC type optical connector plug has an MT-RJ light because the pressing lever protrudes obliquely forward from the front of the boot and its tip is suspended from the tip of the latch piece. With the conventional accidental prevention tool used for connectors, the pressure operation lever in the LC type optical connector plug cannot be completely covered, and the accidental prevention tool easily falls off the pressure operation lever. It is insufficient as an accidental escape prevention function.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and it is completely possible to provide a pressing lever for a single-core or two-core LC type optical connector plug having a latch means. It can be covered and can be prevented from falling off the pressing lever, and it can be easily installed without changing the configuration of the optical connector plug, and completely prevents the latch release operation from being performed accidentally. An object of the present invention is to provide a simple and inexpensive optical connector plug mis-detachment preventing member.

  In order to solve the above-described problems, in the present invention, in the optical connector plug having the latch means, the preventer main body for preventing the plug main body from being accidentally detached due to the erroneous operation of the pressing operation lever for pressing the latch piece. The prevention tool body includes a lever protection part that covers and protects the pressing operation lever from above on the plug body, and a boot holding part that extends rearward from the lever protection part. To do.

  The lever protection part is formed by a U-shaped enclosure having a lower opening, and on the inner surfaces of the left and right side walls, holding levers for holding the pressing operation lever on both the left and right sides are provided.

  The lever protection part is provided with a slit part on the left and right side walls, and the slit part is located on the rear side of the holding projection.

  The lever protector has a guide arm portion projecting forward, and the pair of left and right guide arm portions are inserted into the adapter when the preventer body is attached to the plug body attached to the adapter. It has become a thing.

  The boot holding part is placed along the boot.

  The boot holding portion includes a fitting hole portion that is fitted to the front portion of the boot that is extended from the rear end of the plug body, and the boot rear portion when the preventer body is attached to the plug body that is attached to the adapter. A cut portion communicating with the fitting hole portion is provided below the boot holding portion so that the cord extended into the fitting hole portion is introduced into the fitting hole portion and slid to the boot side.

  The cut portion is formed in a meandering shape.

  According to the present invention, it is possible to completely cover the pressing operation lever of the LC type optical connector plug having the latch means, prevent the dropping from the pressing operation lever, and change the configuration of the optical connector plug. It is possible to easily prevent the latch release operation from being performed erroneously.

  That is, in the present invention, in the optical connector plug having the latch means, the preventer main body is provided with a preventer main body that prevents the plug main body from being accidentally detached due to an erroneous operation of the pressing operation lever for pressing the latch piece. An LC type optical connector having a latch means, comprising a lever protection part that covers and protects the pressing operation lever from above on the plug body and a boot holding part that extends rearward from the lever protection part Since the plug pressing lever can be completely covered, it is possible to completely prevent the latch release operation from being performed erroneously. In addition, the optical connector plug mis-detachment preventing member can be easily attached without changing the configuration of the optical connector plug.

  The lever protection part is formed by a U-shaped enclosure with a lower opening, and on the inner surfaces of the left and right side walls, there are holding projections that hold the pressing operation lever on both the left and right sides. Can be prevented.

  The lever protection part is provided with slits on the left and right side walls, and the slit part is located on the rear side of the holding projection, so at the time of mounting the prevention tool body on the plug body mounted on the adapter, The left and right side walls of the pressing operation lever can be hung on the holding projection while the left and right side walls bend outward through the slit portion, and the lever protector can be smoothly attached to the plug body. .

  The lever protector has a guide arm portion projecting forward, and the pair of left and right guide arm portions are inserted into the adapter when the preventer body is attached to the plug body attached to the adapter. As a result, the holding stability of the lever protector against the adapter is ensured.

  Since the boot holding part is placed along the boot, it is easy to attach the main body of the preventer to the plug body and at the same time the LC type optical connector for single or double core. An inexpensive optical connector mis-detachment preventing member can be provided.

  The boot holding portion includes a fitting hole portion that is fitted to the front portion of the boot that is extended from the rear end of the plug body, and the boot rear portion when the preventer body is attached to the plug body that is attached to the adapter. Since the optical cord extended to the fitting hole is introduced into the fitting hole and is slid to the boot side, a cut portion leading to the fitting hole is provided below the boot holding part. It is possible to provide a uniboot type optical connector mis-detachment preventing member that can provide a more stable guide than a type of optical connector plug.

  Since the cut portion is formed in a meandering shape, it has a function of more reliably preventing the plug body attached to the boot holding portion from being detached from the light coat.

It is a perspective view of the prevention tool main body for single cores which shows one form for carrying out the present invention. Similarly, it shows the structure of a single-core preventer body, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. is there. It explains the mounting example of the prevention tool main body for a single core to the plug main body mounted on the adapter, (a) is a side view of the state before mounting, (b) is a side view of the state after mounting, (C) is a side view which shows the prevention tool main body of the state after mounting | wearing in a cross section. It is a perspective view which shows the other example of a prevention tool main body. Similarly, it shows the configuration of another example of the main body of the protective device, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. . It is a perspective view which shows the state mounted | worn with the plug main body which arranged two prevention tool main bodies of the other example similarly. It is the perspective view of the state which looked at the uniboot type | mold prevention tool main body from diagonally upward. It is the perspective view of the state which looked at the uniboot type | mold prevention tool main body from the diagonally lower side. It shows the configuration of a uni-boot type protective device body, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. . The example of mounting of the uniboot type preventive device main body to the plug main body mounted on the adapter will be described. (A) is a side view showing a state in the middle of being mounted on the cord, A side view showing a state of sliding to the boot side after mounting, (c) is a side view of a state in which the lever is protected by covering the pressing operation lever from above by sliding to the boot side, and (d) is (c). It is a side view which shows the prevention tool main body of a state in a cross section. It is a perspective view of the state which mounted | wore the plug main body with the uniboot type | mold prevention tool main body. It is a half notch sectional view of the state where a uni-boot type prevention device main body was attached to a plug main body. It is sectional drawing of the state which mounted | wore the uniboot type | mold prevention tool main body with the plug main body with which the adapter was mounted | worn.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings.
In the present embodiment, as shown in FIG. 3, the preventer main body 1 constituting the optical connector plug mis-attachment preventer includes a plug main body P (FIG. 11) having a LC-type optical connector plug latch L for a single core. To prevent the plug main body P from being accidentally detached from the adapter Q due to an erroneous operation of the pressing operation lever 12 for pressing the latch piece 11 of the latch means L.

  As shown in FIG. 13, the latch means L includes a pressing operation lever 12 projecting obliquely from the front of the boot 16 attached to the rear end of the plug body P containing the ferrule 13, ferrule holder 14, coil spring 15, etc. The latch piece 11 is provided obliquely from the front end of the plug body P to the rear so as to oppose this, and the latch piece 11 is engaged with the pressing operation lever 12 at the front end. When the pressing operation lever 12 is pressed toward the plug body P, the latch piece 11 is displaced in a direction approaching the plug body P, and the latch piece 11 is engaged with the housing H of the adapter Q.

  That is, the plug body P is inserted simply by pushing it in from the front or rear portion of the housing H of the adapter Q, and the latch piece 11 is elastically bent to be inserted along the inner wall of the housing H. Then, the latch piece 11 is elastically restored at a position reaching a latch engagement hole (not shown) of the housing H, and is engaged with the latch engagement hole in a snap-in manner, whereby the plug body P is engaged in the housing H. Is done. The prevention tool main body 1 according to the present embodiment can cover the pressing operation lever 12 completely by being directly attached to the plug main body P attached to the adapter Q in this way.

  As shown in FIGS. 1 and 2 (a) to 2 (d), the prevention device main body 1 has a U-shaped lower opening for protecting the pressing operation lever 12 from above on the plug main body P. The lever protection part 2 is formed by the enclosed enclosure, and is generally composed of a boot holding part 3 extending rearward from the lever protection part 2.

  In addition, the inner surfaces of the left and right side walls of the lever protection unit 2 are provided with holding projections 4 in the form of skew projections for holding the pressing lever 12 on both the left and right sides, and further on the inner surfaces of the left and right side walls adjacent to the holding projections 4. Is formed with an oblique locking portion 5 for holding the pressing lever 12 obliquely from above.

  Further, slit portions 6 are provided on the left and right side walls of the lever protection portion 2 at positions on the rear side of the holding projection 4 from the lower edge toward the oblique front. At this time, a part of the locking portion 5 corresponding to the position of the slit portion 6 is cut off.

  Since the slit portion 6 is provided on each of the left and right side walls of the lever protection portion 2, when the pressing operation lever 12 is inserted into the lever protection portion 2 when the prevention device body 1 is mounted on the plug body P. At the same time, it is assumed that a bending elastic force (flexibility) is applied to the lever protection portion 2 itself so that the left and right sides of the pressing operation lever 12 get over the respective holding projections 4 and are held by the locking portions 5. is there. A pair of left and right rectangular openings 9 are formed on the upper surface of the lever protection unit 2.

  Furthermore, a guide arm portion 7 is projected forward from the lower side of each front end of the left and right side walls of the lever protection portion 2, and when the prevention device main body 1 is attached to the plug main body P attached to the adapter Q. Since the pair of left and right guide arm portions 7 are inserted into the adapter Q, the holding stability of the lever protection portion 2 with respect to the adapter Q is ensured.

  On the other hand, the boot holding portion 3 is held in a mounted manner along the boot 16 and has an upper surface tapered, and a distal end of the boot holding portion 3 includes a plug main body P or an adapter of the preventer main body 1. A flange-like operation portion 8 for facilitating the pushing operation or the pulling operation with respect to Q is formed.

  Next, an example of use of the embodiment configured as described above will be described with reference to FIG. The plug body P is inserted in advance in the housing H of the adapter Q.

  First, as shown in FIG. 3A, the operation unit 8 is held with fingers, and the prevention tool main body 1 is placed on the plug main body P. Then, as shown in FIG. 3 (b), the preventer main body 1 is slid along the boot 16 toward the front adapter Q side to guide the pair of left and right guide arm portions 7 into the adapter Q. At this time, as shown in FIG. 3 (c), the pressing lever 12 is inserted into the lever protection portion 2, and at the same time, the right and left sides of the pressing lever 12 get over the holding projections 4 and then the pressing lever 12 is pressed. The operation lever 12 itself is locked and held by the skewed locking portions 5 on the inner surfaces of the left and right side walls. Thus, the pressing operation lever 12 is completely covered and protected by the lever protection portion 2.

  In this way, the pressing operation lever 12 can be completely covered by the lever protection portion 2 and the holding device 4 can prevent the prevention device main body 1 from falling off the pressing operation lever 12, and the latch release operation is erroneously performed. Can be completely prevented.

  4, FIG. 5A to FIG. 5E, and FIG. 6 show a modification of the preventer main body 1 in the present embodiment. That is, in this modification, the width of the lever protection portion 2, that is, the distance between the left and right side walls corresponds to the two plug main bodies P so that the protective device main body 1 can be attached to the two LC core optical connectors arranged side by side. The length is possible.

  In addition, since it is the same as that of this embodiment mentioned above about the structure of the prevention tool main body 1 other than the lever protection part 2, and a usage example, the detailed description is abbreviate | omitted.

  Thus, FIGS. 7 to 13 show another modified example (uni-boot type) of the preventer main body 1 in the present embodiment. In this uni-boot type, unlike the above modification, an optical connector coupling structure in which a pair of plug bodies P branched from one boot 16 are held and fixed to the clip body K in a double parallel state. The body is the basic configuration.

  That is, in this modification, as shown in FIGS. 7, 8, 9 (b), 9 (d), and 9 (e), the rectangular shape extended downward is provided below the boot holding portion 3. The boot holding part 3 is provided with a fitting hole part 18 penetrating forward and backward so as to be fitted to the front part of the boot 16. Further, as shown in FIGS. 9A to 9C, a plurality of protrusions 20 for preventing slipping are formed on the upper and lower surfaces of the base.

  Further, as shown in FIGS. 8 and 9D to 9E, the lower surface of the boot holding portion 3 is formed with a meandering cut portion 19 that leads to the fitting hole portion 18, and the adapter Q The optical cord 17 extended to the rear part of the boot 16 can be introduced into the fitting hole 18 when the preventer main body 1 is mounted on the plug main body P mounted on the fitting hole 18. The meandering of the notches 19 prevents the optical cord 17 from being easily removed from the boot holding portion 3 once the optical cord 17 has been introduced into the fitting hole 18. On the other hand, the fitting hole 18 has a straight hole shape, and after the optical cord 17 is mounted, the prevention device main body 1 itself can be slid along the optical cord 17 to the front portion on the boot 16 side.

  Further, similarly to the above-described modification, the lateral width of the lever protection portion 2, that is, the distance between the left and right side walls is set to a length that can correspond to the two plug bodies P. In this case, the inner surfaces of the left and right side walls of the lever protection portion 2 are provided with holding projections 4 having skew projections for holding the pressing operation lever 12 on both the left and right sides. A slit portion 6 is formed upward from the lower edge of the side wall, and is connected to a pair of left and right rectangular openings 9 formed toward the front of the upper surface of the lever protection portion 2. In addition, since it is the same as that of this embodiment and the modification which were mentioned above regarding the structure of the prevention tool main body 1 other than the boot holding part 3 and the slit part 6, the detailed description is abbreviate | omitted.

  When using the prevention tool main body 1 in this modification, first, as shown in FIG. 10A, the optical cord 17 is inserted from the notch 19 on the lower surface of the base and introduced into the fitting hole 18. Next, as shown in FIG. 10B, the preventer main body 1 is slid from the optical cord 17 along the boot 16 toward the front adapter Q side. At this time, as shown in FIGS. 10 (c), 10 (d), 12, and 13, the pressing operation lever 12 is inserted into the lever protection unit 2, and at the same time the left and right sides of the pressing operation lever 12 are After getting over each holding projection 4, the pressing lever 12 itself is locked and held by the skewed locking portions 5 on the inner surfaces of the left and right side walls. In this way, as shown in FIG. 11, the pressing operation lever 12 is completely covered and protected by the lever protection portion 2.

P Plug body L Latching means 1 Preventor body 2 Lever protection part 3 Boot holding part 4 Holding protrusion 5 Locking part 6 Slit part 11 Latch piece 12 Press operation lever 16 Boot 17 Optical cord 18 Fitting hole part 19 Serpentine cut Part

Claims (7)

  An optical connector plug having a latch means includes a preventer main body that prevents the plug main body from being accidentally detached due to an erroneous operation of a press operating lever for pressing the latch piece. The preventer main body includes a press operating lever on the plug main body. An optical connector plug misdetachment prevention device comprising: a lever protection portion that covers and protects from above, and a boot holding portion that extends rearward from the lever protection portion.   2. The optical connector plug mis-prevention prevention according to claim 1, wherein the lever protection part is formed by a U-shaped enclosure having a lower opening, and inner side surfaces of the left and right side walls are provided with holding projections for holding the pressing operation lever on both the left and right sides. Ingredients.   3. The optical connector plug misdetachment prevention device according to claim 2, wherein the lever protection part is provided with a slit part on the left and right side walls, and the slit part is located rearward of the holding projection.   The lever protector has a guide arm portion projecting forward, and the pair of left and right guide arm portions are inserted into the adapter when the preventer body is attached to the plug body attached to the adapter. 4. The optical connector plug misdetachment prevention device according to any one of claims 1 to 3.   The optical connector plug erroneous removal prevention device according to any one of claims 1 to 4, wherein the boot holding portion is placed along the boot.   The boot holding portion includes a fitting hole portion that is fitted to the front portion of the boot that is extended from the rear end of the plug body, and the boot rear portion when the preventer body is attached to the plug body that is attached to the adapter. The light according to any one of claims 1 to 4, further comprising: a notch portion that leads to the fitting hole portion below the boot holding portion so that the cord extended into the fitting hole portion is introduced into the fitting hole portion and slid to the boot side. Connector plug accidental removal prevention tool.   The optical connector plug erroneous removal prevention tool according to claim 6, wherein the cut portion is formed in a meandering shape.

Images