JP2012103415A - Optical connector plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector plug that can prevent a plug body from being pulled out from an adapter as a release lever is pressed carelessly, maliciously, etc., and that is adaptive to specifications and uses such that an operator should not pull out the optical connector plug by the operator's choice.SOLUTION: After a plug body 11 is mounted on an adapter 31, a rear end of a release lever 18 is stored and located in the adapter to correspond to the position of a lock part 34 so that manual operation from outside is disabled. When the plug body is pulled out from the adapter, a removal key tool 51 for disengagement is inserted between an inner wall of the adapter and the rear end of the release lever to press the release lever toward the plug body, and latch parts 19a, 19b are released from engaging the lock part, thereby enabling the plug body to be pulled out from the adapter. Further, the plug body has a key hole part 41 for guide into which the removal key tool is inserted and which guides a tip thereof to a press surface 18A of the release lever.

Description

  The present invention relates to an optical connector for detachably connecting an optical connector plug having a ferrule to an adapter.

  Conventionally, as a technique for detachably connecting an optical connector plug provided with a ferrule to an adapter, there is one provided with a release lever that protrudes obliquely from the outer peripheral surface of the plug body toward the proximal end. A latch piece protrudes from a substantially intermediate portion of the release lever so as to be engaged with a locking portion formed on the inner wall of the mating adapter to be connected. A manual operation unit is provided for easy removal of the plug body.

  When the plug body is attached to the adapter, the plug body is inserted as it is, the release lever is deformed, and the latch piece is engaged with the engaging portion of the adapter inner wall. This prevents the optical connector plug from being removed from the adapter. Also, when removing the plug body from the adapter, push down the manual operation part at the rear end of the release lever with your fingers to release the engagement between the latch piece and the locking part of the adapter inner wall, and then pull the plug body forward I was doing.

Specifically, the optical connector shown in Patent Document 1 is known.
Thus, the optical connector shown in Patent Document 1 has the following configuration and functions.

  On the upper surface side of the connector 4a, a lever portion 12 having elasticity in the vertical direction extending obliquely upward from the distal end side to the proximal end side is integrally formed. A pair of left and right engaging protrusions 13 that are engaged with the two locking holes 2 b in the upper wall portion of the adapter 2 are formed in the middle portion of the lever portion 12 in the length direction. Therefore, when the connector 4a is inserted into the mounting hole 2a of the adapter 2, the lever portion 12 is elastically deformed, and when the connector 4a is inserted in a predetermined state, the lever portion 12 is elastically returned and deformed up and down. The pair of engaging protrusions 13 are engaged with the two locking holes 2b of the adapter 2, and the mounting state of the two-core connector unit 1 is maintained.

The operation lever 20a is for a user to operate when removing the two-core connector unit 1 attached to the adapter 2. As shown in FIGS. 4 and 5, the operating lever 20a
Has elasticity in the vertical direction, and the operation lever 20a is formed to extend obliquely upward from a middle portion of the upper surface of the clip body 20 toward the distal end side. In a state where the pair of connectors 4a and 4b are attached to the clip 5, the distal end portion of the operation lever 20a overlaps the upper surface of the base end portion of the lever portion 12, and the user pushes the distal end portion of the operation lever 20a downward. Then, the pair of lever portions 12 are also pushed downward, the engagement projections 13 engaged with the mounting holes 2b of the adapter 2 are released, and the two-core connector unit 1 can be detached from the adapter 2. Become.

JP 2005-189288 A

  However, in the conventional optical connector, since the manual operation unit (clip) is provided at the rear end of the release lever, the manual operation unit is pushed carelessly or by mischief or the like when the adapter is mounted, and the plug body is moved from the adapter. There is a risk of being pulled out.

  Also, in the high-density mounting optical fiber connector system, the adapter and plug body are a very dense and dense composite system in a narrow space, so when pulling out a specific plug body, There is a risk that even objects will be pushed and removed by fingers or withdrawn plugs, etc., and the security function as a connector system is not fulfilled sufficiently, and the manual operation part (clip) protrudes outside the adapter As a result, the actual situation is an obstacle to high-density mounting.

  Furthermore, in the conventional optical connector, there are specifications and applications that make it difficult for an operator or the like to unplug the optical connector plug without permission. For example, if you need a network security system that locks patch panels, HUBs, and information outlet empty boards to protect personal information and protect important data from unauthorized access and viruses, Even if it is attached to the mating connector or adapter, the manual operation section (clip) described above is always exposed from the mating connector or adapter. Was.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and the manual operation unit is pushed inadvertently or by mischief or the like, and the plug body is removed from the adapter. It can be prevented in advance, and it can be fully adapted to specifications and applications that would otherwise be difficult for workers etc. to unplug optical connector plugs on their own. An object of the present invention is to provide an optical connector capable of constructing various plug security systems that cannot be unlocked.

  In order to solve the above-described problem, in the present invention, a plug body incorporating a ferrule into which the vicinity of the distal end of an optical fiber is inserted, and an obliquely upward direction from the outer peripheral surface of the distal end of the plug body toward the proximal end side. An optical connector comprising a protruding release lever and a latch portion protruding from the release lever so as to engage with a locking portion formed on the inner wall of the mating adapter to be connected, the plug to the adapter After the main body is mounted, the rear end of the release lever is accommodated in the adapter so that manual operation from the outside is impossible, and the rear end is provided corresponding to the position of the locking portion of the adapter inner wall. .

  Also, when removing the plug body from the adapter, the release lever (latch part) is pushed toward the plug body by inserting it between the inner wall of the adapter and the rear end of the release lever, and the latch part is engaged with the locking part. It is provided with an extraction key tool for releasing engagement that can be released.

  Furthermore, the latch portion is formed outward from both sides of the rear end portion of the release lever, and the center of the rear end portion sandwiched between both latch portions is formed as a substantially chevron-shaped pressing surface. The release lever (latch part) is formed so as to be displaceable to the plug main body side by pressing the inclined part formed at the tip of the key tool for removal onto the surface.

  The plug body is provided with a guide key hole portion for inserting the extraction key tool and guiding the tip to the pressing surface, and the key hole shape of the guide key hole portion is the key of the extraction key tool. It is formed so as to correspond to the groove shape. Also, an extraction tool having one or more guide protrusions inside the key hole of the guide key hole portion of the plug body, and one or more key grooves corresponding to the guide protrusions. It has.

  According to the present invention, after the plug body is mounted on the adapter, the rear end of the release lever is accommodated in the adapter so that manual operation from the outside is impossible, and the rear end corresponds to the position of the locking portion. In other words, since the manual operation part (the part exposed from the adapter after the plug body is mounted) extending to the conventional release lever has been eliminated, the manual operation part (cancellation) is inadvertently or mischiefed. The lever can be prevented from being pulled out of the adapter by pushing the lever, and it is possible to handle the specifications and applications that would be difficult for the operator to remove the optical connector plug without permission. Thus, it is possible to construct various optical connector plug security systems in which the latch pieces cannot be released (key release) by anyone other than the person in charge of each department such as a company or office.

  When removing the plug body from the adapter, insert the removal release key tool between the inner wall of the adapter and the rear end of the release lever to press the release lever inward (plug body side). Because the engagement of the latch part with the locking part is made releasable, the plug body can be easily removed from the adapter only by inserting the removal key tool only when it is necessary to remove the plug body from the adapter. Can do.

  Specifically, the latch portion is formed from both sides of the rear end portion of the release lever toward the upper outside, and the center of the rear end portion sandwiched between both latch portions is formed as a substantially chevron-shaped pressing surface. Because the release lever (latch part) can be displaced toward the plug body side by pressing the inclined part formed at the tip of the removal key tool against this pressing surface, the release lever of the removal key tool can be The inward displacement can be reliably and smoothly performed, and therefore the plug body can be easily and easily removed.

  Further, the plug body is provided with a guide key hole portion for inserting the extraction key tool and guiding the tip to the pressing surface, and the key hole shape of the guide key hole portion is the key of the extraction key tool. Since it is formed so as to correspond to the groove shape, insertion of the removal key tool is prevented in the case of a guide key hole portion having a key hole shape different from the key groove shape.

  As a result, by preparing a plurality of plug main bodies having various key hole shapes and extraction key tools having various key groove shapes corresponding to the key hole shapes, keys by persons other than the owner of the extraction key tool can be obtained. Release can be prevented.

  For example, an optical connector plug security system that cannot be unlocked by a person other than the person in charge at each level (department) in a company or business office can be constructed. Therefore, it is possible to expand the specifications and applications of the optical connector over a wide range.

It is a perspective view of the plug main body and the extraction key tool which show one form for carrying out the present invention. It is a side view of a plug main body similarly. It is a side view of the state which similarly inserts the extraction key tool in the guide key hole of the plug body. (A) is a vertical side view which shows the fitting state of an adapter and a plug main body, (b) is an expanded sectional view which shows the latching | locking part of an adapter inner wall. Similarly, in a fitting state of the adapter and the plug main body, it is a vertical side view of a state in which the extraction key tool is inserted into the guide key hole of the plug main body. Similarly, in a fitting state of the adapter and the plug main body, it is a vertical side view of a state in which the removal key tool is inserted into the guide key hole portion of the plug main body and the release lever is pressed down (the latch portion is released). It is a perspective view of a plug main part and an extraction key tool showing an example of a key hole part for a guide by an assembly type similarly to a plug main part. It is a perspective view which similarly shows the key hole part for a guide by an assembly type, and a clip frame. It is a perspective view of a plug main body and an extraction key tool showing an example of an integral type guide key hole for the plug main body. (A) thru | or (c) is the perspective view which showed the state which inserted these extraction key tools in the key hole part for guides corresponding to the extraction key tool provided with various different keyways. It is explanatory drawing which shows whether the key groove shape of the extraction key tool and the key hole shape of the guide key hole part which is a receiving side can be inserted, and classifies the key groove of the extraction key tool by A thru | or D, 4 categorizes the key hole shapes of the guide key holes. Similarly, it is an explanatory view showing whether or not the key groove shape of the key tool for removal and the key hole shape of the guide key hole portion on the receiving side can be inserted, and the range in which the responsibility level (position) can be operated in correspondence with the key shape Is shown. The state which inserted the key tool for extraction in the key hole part for a guide is shown, (a) is a cross-sectional view of the combination by A-1 in FIG. 11, (b) is the crossing of the combination by B-2 in FIG. FIG. 12C is a cross-sectional view of the combination according to C-3 in FIG. 11, and FIG. 11D is a cross-sectional view of the combination according to D-4 in FIG. The state which inserted the key tool for extraction in the key hole part for a guide is shown, (a) is a longitudinal cross-sectional view of the combination by A-1 in FIG. 12, (b) is a vertical section of the combination by B-2 in FIG. FIG. 13C is a longitudinal sectional view of the combination according to C-3 in FIG. 12, and FIG. 13D is a longitudinal sectional view of the combination according to D-4 in FIG.

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

  As shown in FIG. 1, the optical connector according to the present invention includes a plug main body 11 including a ferrule 15 into which the vicinity of the distal end of an optical fiber is inserted, and a distal end outer peripheral surface of the plug main body 11 toward the base end side (rear). The release lever 18 projecting diagonally upward is engaged with the engaging portion 34 (see FIGS. 4 to 6) formed opposite to both sides of the inner wall of the mating portion of the mating adapter 31 to be connected. A pair of left and right latch portions 19a and 19b projecting on both sides of the rear end of the release lever 18 are provided, and when the engagement release key tool 51 to be described later is inserted into the plug body 11, the key tool 51 is provided. A guide key hole 41 for guiding the tip to the pressing surface 18A of the release lever 18 is provided.

  As shown in FIGS. 4 to 6, the adapter 31 is formed by a housing 31a in which an upper side wall, left and right side walls, a bottom wall, and one partition wall are integrally formed. The fitting portions 31b of the connector plugs open in the horizontal direction.

  In addition, one cylinder 35 projects from one of the pair of right and left joint end walls arranged in the center of the housing toward the end of the fitting portion, and the other joint end wall has the other joint end wall. A cylinder 36 projects toward the end of the fitting portion 31b, and the sleeve holder 32 is formed by engaging and fixing the joining end walls with the cylinders 35 and 36 having the same center axis on the optical axis. Is done. At this time, a cylindrical split sleeve 33 is mounted and held inside the sleeve holder 32. A notch 34a (see FIG. 4 (b)) is formed on both inner sides of the upper side wall of the adapter 31 as a locking portion 34 with which the latch portions 19a and 19b protruding from the release lever 18 are engaged. Yes.

  The optical connector plug is composed of, for example, an LC-type plug body 11, and the plug body 11 includes a coupling sleeve 12 and a ferrule tube in the coupling sleeve 12 as shown in FIGS. 4 to 6. 13 and a ferrule 15 attached to the frame 14, a spring 16 attached to the outer periphery of the rear end of the frame 14, a main body frame 17 fitted to the rear end of the frame 14 via the spring 16, and a main body frame 17 and a boot 20 attached to the rear part.

  Further, on the outer peripheral surface of the coupling sleeve 12, a release lever 18 for integrally engaging with and releasing the adapter 31 is provided integrally with the coupling sleeve 12. The release lever 18 is inclined and extended upward so as to gradually move away from the outer surface of the coupling sleeve 12 from the front end portion to the rear end portion of the coupling sleeve 12.

  After the plug body 11 is mounted on the adapter 31, the release lever 18 is arranged so that the rear end of the release lever 18 is accommodated in the adapter 31 so that manual operation from the outside is impossible. It is provided corresponding to the positions of the locking portions 34 on both sides of the inner wall of the adapter 31. That is, by removing the manual operation portion (the portion exposed from the adapter 31 after the plug body 11 is mounted) extending to the conventional release lever 18 and making the manual removal operation impossible, the removal operation described later is performed after the mounting. If the key tool 51 is not used, the plug body 11 cannot be removed from the adapter 31.

  Incidentally, the correspondence between the rear end portion of the release lever 18 and the locking portions 34 on both sides of the inner wall of the adapter 31 is determined by the latch portions 19a and 19b provided on the rear end of the release lever 18 and the locking portions 34 on both sides of the inner wall of the adapter 31. However, what is necessary is just to be in the positional relationship which can be engaged when the plug main body 11 is mounted.

  The latch portions 19 a and 19 b are formed outward from both sides of the rear end portion of the release lever 18, and the release lever 18 is inserted while being pushed down by the upper side wall of the adapter 31 when the plug body 11 is attached to the adapter 31. After the mounting, the release lever 18 is elastically restored so that the latch portions 19a and 19b are engaged with the notches 34a of the locking portion 34 on the inner side wall of the adapter 31, respectively.

  Further, the center of the rear end portion sandwiched between the left and right latch portions 19a and 19b of the release lever 18 is formed as a pressing surface 18A having a substantially chevron-shaped curved shape (upward convex arc shape), and is removed from the pressing surface 18A. The release lever 18 (latch portions 19a, 19b) is displaced toward the plug body 11 side when the inclined portion 52 formed on the lower surface of the front end of the key tool 51 is pressed. That is, when the plug body 11 is removed from the adapter 31, the removal key tool 51 for releasing the engagement is inserted between the upper inner wall of the adapter 31 and the pressing surface 18A of the release lever 18 so that the tip of the removal key tool 51 is inserted. The inclined portion 52 presses the pressing surface 18A at the center of the rear end portion of the release lever 18 inward (on the plug body 11 side) so that the engagement of the latch portions 19a and 19b with the notch 34a of the locking portion 34 can be released. Yes.

  Accordingly, the pressing surface 18A of the release lever 18 is formed to have a width that does not abut against the left and right latch portions 19a and 19b when the extraction key tool 51 is inserted, and the left and right latch portions 19a and 19b are formed from the pressing surface 18A. It protrudes slightly upward.

  Further, the plug body 11 has a guide key hole 41 for guiding the tip of the key tool 51 to the pressing surface 18A of the release lever 18 when the removal key tool 51 is inserted. 17 is provided integrally. That is, as shown in FIGS. 1 to 6, the main body frame 17 is attached so as to cover the ferrule tube 13 between the coupling sleeve 12 of the plug main body 11 and the boot 20. On one side surface, a guide key hole 41 having a square hole-shaped key hole 42 is integrally extended toward the rear boot 20 side. At this time, the pressing surface 18A at the center of the rear end portion of the release lever 18 is disposed opposite to the longitudinal extension of the key hole 42 of the guide key hole 41.

  On the other hand, the extraction key tool 51 has a square bar-like arm portion 54 protruding from a handle 53, and the inclined portion 52 is formed on the lower surface side of the tip of the arm portion 54. Then, as shown in FIG. 5, the arm portion 54 of the removal key tool 51 is inserted into the key hole 42 of the guide key hole portion 41, and the handle 53 of the guide key hole portion 41 is inserted as shown in FIG. 6. When pushed in until it is locked to the rear opening edge, the tip of the arm portion 54 (inclined portion 52) is released while being inserted between the upper inner wall of the adapter 31 and the pressing surface 18A of the release lever 18. The lever 18 itself is pressed inward (on the plug main body 11 side) by the inclined portion 52, whereby the engagement of the latch portions 19a and 19b with the notch 34a of the locking portion 34 is released.

  At this time, if the outer shape of the arm portion 54 of the removal key tool 51 does not exactly match the inner shape of the key hole 42 of the guide key hole portion 41, the arm portion 54 cannot be inserted into the key hole 42. The plug body 11 cannot be removed from the adapter 31.

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

  As shown in FIG. 4, when the plug main body 11 is attached to one fitting portion 31 b of the adapter 31, the release lever 18 is inserted while being pushed down by the upper side wall of the adapter 31. Then, the latch portions 19a and 19b are engaged with the notches 34a of the locking portion 34 on both inner sides of the upper wall of the adapter 31. At the same time, the coupling sleeve 12 of the adapter 31 is externally fitted to the sleeve holder 32, and the ferrule 15 of the plug body 11 is internally fitted to the split sleeve 33 inside the sleeve holder 32. At this time, the rear end portion of the release lever 18 is accommodated in the adapter 31 and cannot be manually operated from the outside.

  When the plug body 11 is removed from the adapter 31, as shown in FIGS. 5 and 6, the arm portion 54 of the removal key tool 51 is inserted into the key hole 42 of the guide key hole portion 41, and the handle 53 serves as a guide. Push in until the rear opening edge of the key hole 41 is locked. At this time, the inclined portion 52 at the tip of the removal key tool 51 is inserted between the upper inner wall of the adapter 31 and the pressing surface 18A of the release lever 18, and the inclined portion 52 is a pressing surface 18A at the center of the rear end of the release lever 18. Is pressed inward (on the plug body 11 side), the engagement of the latch portions 19a and 19b with the notch 34a of the locking portion 34 is released, and then the plug body 11 is removed from the adapter 31 to the front. .

7 and 8 show other examples of the optical connector plug according to the present invention.
In this example, the guide key hole 41 can be externally attached to the plug body 11. That is, the guide key hole 41 is not formed integrally with the main body frame 17 of the plug main body 11, but has two grips capable of simultaneously holding the main body frames 17 of the two plug main bodies 11. A clip frame body 43 having grooves 45 on both sides of the central partition wall 46 is provided, and a guide key hole 41 is integrally provided at the upper end of the central partition wall 46. That is, the main body frame 17 of the plug main body 11 is held in the holding grooves 45 of the clip frame body 43. Note that reference numeral 47 in FIG. 7 is a stopper portion for preventing the clip frame body 43 from sliding out toward the front of the main body frame 17.

  The shape of the key hole 42 of the guide key hole portion 41 is a flat rectangular hole having a wide width so as to face the pressing surface 18A of each release lever 18 of the two plug bodies 11, and at the center of the inner upper surface thereof. By providing the guide protrusion 44, it becomes a substantially concave hole when viewed from the front.

  In response to this, the removal key tool 51 is provided with a band-plate-like insertion portion 56 protruding from a handle 55, and a key groove 57 that engages with the guide protrusion 44 is formed at the center of the insertion portion 56. ing. A pair of left and right arm portions 58 whose lower surface side is the inclined portion 52 are extended from the distal end of the insertion portion 56.

  By inserting the removal key tool 51 into the guide key hole 41, the pressing surfaces 18A of the release levers 18 of the two plug bodies 11 are simultaneously pressed inward (plug body 11 side) and locked. The latch portions 19a and 19b are disengaged from the notch 34a of the portion 34, and the two plug bodies 11 can be removed from the adapter 31.

FIG. 9 shows still another example of the optical connector plug according to the present invention.
In this example, the guide key hole 41 is integrated with the two plug bodies 11. That is, the guide key hole 41 is integrally formed in place of the main body frames 17 of the two plug main bodies 11.

  Specifically, the guide key hole 41 is formed by a pair of upper and lower frame bodies 61a and 61b, and two front and rear leg parts 62a and 62b each having a hook portion (not shown) at the tip are provided at the lower end of the frame body 61a. The frame body 61b is formed with two front and rear engaging grooves 63a and 63b for engaging the leg portions 62a and 62b. The pair of upper and lower frame bodies 61a and 61b are integrated and fixed to the two plug bodies 11 by being fixedly fitted to each other. The upper frame 61a is provided with a key hole 42 that is substantially concave when viewed from the front as described above, penetrating in the front-rear direction. In addition, the extraction key tool 51 corresponding to this has an arc recess 55 </ b> A so that the lower side of the handle 55 does not hit the boot 20.

  Further, (a) to (c) in FIG. 10 show various different key grooves with respect to the key holes 42 of various shapes of the integrated guide key hole portion 41 attached over the two plug bodies 11. 5 shows a state in which an extraction key tool 51 having 57 is inserted.

  That is, in FIG. 10A, one key groove 57 that engages with one guide protrusion 44 of the key hole 42 is formed in the insertion portion 56 of the key tool 51, and in FIG. Two key grooves 57 that engage with the two guide protrusions 44 of the hole 42 are formed in the insertion portion 56 of the key tool 51. In FIG. 10C, the three guide protrusions 44 of the key hole 42 are formed. Three key grooves 57 are formed in the insertion portion 56 of the key tool 51. An arc recess 55A is formed so that the lower side of the handle 55 corresponding to this does not hit the boot 20.

  In FIG. 11 and FIG. 12, whether or not the shape of the key groove 57 and the shape of the key hole 42 on the receiving side can be inserted is indicated by ○ and ×.

  13 shows a state in which the extraction key tool 51 is inserted into the guide key hole 41 in FIG. 11, (a) is a cross-sectional view of the combined state by A-1 in FIG. 11, and (b) is a diagram. 11 is a cross-sectional view in a combined state by B-2 in FIG. 11, (c) is a cross-sectional view in a combined state by C-3 in FIG. 11, and (d) is a cross-sectional view in a combined state by D-4 in FIG. FIG.

  FIG. 14 also shows a state in which the extraction key tool 51 is inserted into the guide key hole 41 in FIG. 11, (a) is a longitudinal sectional view of the combined state by A-1 in FIG. 11, (b). 11 is a longitudinal sectional view of the combined state by B-2 in FIG. 11, (c) is a longitudinal sectional view of the combined state by C-3 in FIG. 11, and (d) is a combined state by D-4 in FIG. It is a longitudinal cross-sectional view.

  That is, as the shape of the key groove 57, for example, FIG. 11A shows a case where there is one wide key groove 57 (see FIG. 13 and FIG. 14A), and FIG. When the grooves 57 are juxtaposed at equal intervals (see FIGS. 13 and 14B), (C) is when the two key grooves 57 are juxtaposed on one side (FIGS. 13 and 14C). (D) and (D) are four ways in the case where there is one elongated key groove 57 in the center (see FIG. 13 and FIG. 14 (d)), the shape of the key hole 42 corresponds to these, In FIG. 11 (1), when there is one wide guide protrusion 44 (see FIGS. 13 and 14A), in (2), three elongated guide protrusions 44 are juxtaposed at equal intervals. (See FIG. 13 and FIG. 14B), in (3), two guide protrusions 44 are juxtaposed on one side. (4), in the case of (4), there are four shapes in the case where there is one elongated guide protrusion 44 in the center (see FIG. 13 and FIG. 14 (d)). The width, number, and position of the guide protrusion 44 are appropriately changed.

  At this time, when the shape of the key groove 57 is (A), it can be inserted into the shapes of all the key holes 42 (1), (2), (3), (4). 2) It can be inserted into the shape of the key hole 42 of (3), (4). In the case of (C), it can be inserted into the shape of the key hole 42 of (3), (4). In the case of (D) , (4) can be inserted only into the shape of the key hole 42. Otherwise, the arm portion 54 of the removal key tool 51 cannot be inserted into the key hole 42 of the guide key hole portion 41.

  In this way, by making the shape of the key hole 42 of the guide key hole portion 41 correspond to the shape of the key groove 57 of the removal key tool 51, as shown in FIG. 12, the removal key according to each responsibility level (position). The range in which the tool 51 can be operated can be determined, whereby an optical connector plug security system can be constructed so that keys other than those responsible for each level (department) cannot be released.

11 Plug body 12 Coupling sleeve 13 Ferrule tube 14 Frame 15 Ferrule 16 Spring 17 Body frame 18 Release lever 18A Press surface 19a, 19b Latch part 20 Boot 31 Adapter 31a Housing 31b Fitting part 32 Sleeve holder 33 Split sleeve 34 Locking Portion 34a Notch 35 Cylinder 36 Cylinder 41 Guide key hole portion 42 Key hole 43 Clip frame body 44 Guide projection 45 Grip groove 46 Central partition wall 47 Stopper portion 51 Key tool 52 for removal Inclination portion 53, 55 Handle 54 Arm portion 56 Insert part 57 Key groove 58 Arm part 61a, 61b Frame body 62a, 62b Leg part 63a, 63b Engagement groove

Claims (5)

  Formed on the inner wall of the mating adapter to be connected to the plug body with a built-in ferrule inserted near the distal end of the optical fiber, the release lever projecting diagonally upward from the outer peripheral surface of the distal end of the plug body toward the proximal end The optical connector includes a latch portion protruding from the release lever so as to engage with the latched portion, and the rear end portion of the release lever is housed in the adapter after the plug body is attached to the adapter. An optical connector, characterized in that the rear end portion is provided so as to correspond to the engaging portion position of the inner wall of the adapter so that manual operation from the outside is impossible.   When removing the plug body from the adapter, the release lever (latch part) is pressed toward the plug body by inserting it between the inner wall of the adapter and the rear end of the release lever, and the latch part is engaged with the locking part. The optical connector according to claim 1, further comprising an extraction key tool for releasing engagement that can be released.   The latch portion is formed outward from both sides of the rear end portion of the release lever, and the center of the rear end portion sandwiched between both latch portions is formed as a substantially chevron-shaped curved pressing surface. The optical connector according to claim 1 or 2, wherein a release lever (latch part) is formed so as to be displaceable to the plug body side by press-contacting an inclined part formed at the tip of the extraction key tool.   The plug body has a guide key hole for inserting the extraction key tool and guiding the tip to the pressing surface. The key hole shape of the guide key hole is the key groove shape of the extraction key tool. The optical connector according to claim 1, wherein the optical connector is formed so as to correspond to the above.   One or more guide protrusions are provided inside the key hole of the guide key hole portion of the plug main body, and an extraction tool having one or more key grooves corresponding to the guide protrusions is provided. The optical connector according to claim 1.

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