JP2012141392A - Optical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector in which various plug security systems can be constructed by allowing the pull-out of an optical connector plug only after a responsible person performs an operation of unlocking a key and forbidding persons other than the responsible persons of respective departments from pulling out the optical connector plug.SOLUTION: The optical connector includes a lock plate 21 for preventing the axial movement of a knob 18 with respect to a plug frame 12. The lock plate 21 includes a grip arm portion 21a externally fitted around a stop ring 14, an elastic plate portion 21b extending from the grip arm portion 21a along the axial direction, and an engagement part 22 orthogonally outward protruding with respect to the axial direction from the tip end of the elastic plate portion 21b. The engagement part 22 is locked to a locking part 31d provided on the inner wall of the knob 18 so as to prevent the axial movement of the knob 18 with respect to the plug frame 12.

Description

  The present invention relates to an optical connector that detachably connects an optical connector plug having a ferrule to an adapter, and more particularly to an optical connector that can be used for applications that are difficult for an operator or the like to unplug.

  Conventionally, SC adapters that detachably connect optical connector plugs equipped with ferrules to the adapter have adopted a push-on type fastening structure with a slide lock structure, and can be connected / disconnected by simply pushing the optical connector plug into / out of the adapter. Can do. When the optical connector plug is pushed into the adapter, the claws formed on the sleeve in the adapter are spread out by the knobs of the optical connector plug, and the claws are locked and coupled to the projections of the plug frame by further pushing. Also, when the optical connector plug is pulled out of the adapter with the knob, the adapter can be released by pushing the tab of the adapter while releasing it while sliding with respect to the plug frame.

nothing special

  However, in the conventional optical connector, since it is possible for anyone to freely retract the knob by a predetermined stroke, it cannot be used for applications where it is difficult for an operator to unplug the optical connector plug without permission. It has become.

  For example, if you need a network security system that locks patch panels, HUBs, information board empty boards, protects personal information, protects important data from unauthorized access or viruses, etc. Since the knob itself can be freely moved even if it is attached to the counterpart connector or adapter, the operator may unplug the optical connector plug without permission.

  Moreover, recently, with the spread of IT technology, an optical connection system is often installed in the home, and there is a risk that a child or the like will accidentally or mischiefly pull out the optical connector plug.

  Thus, in the conventional optical connector, the actual situation is that a sufficient network security system is not utilized.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and the responsible person unlocks the key so as to cope with the use where it is difficult for the operator to unplug the optical connector plug without permission. The optical connector plug can be removed for the first time by performing the operation, and the optical connector plug cannot be removed by anyone other than the person in charge of each department. An object is to provide a connector.

  In order to solve the above-described problems, in the present invention, a plug frame incorporating a ferrule into which the vicinity of the tip of the optical fiber is inserted, and a rear end portion side of the ferrule are inserted, and the plug frame has a rear end portion inside. An optical connector tab having a stop ring inserted through a spring and a knob for inserting and storing the plug frame from the distal end side, and the knob and the plug frame move separately to release the lock of the adapter. A plug is provided, which is provided with a lock plate for preventing the knob from moving in the axial direction with respect to the plug frame.

  The lock plate includes a gripping arm portion fitted on the stop ring, an elastic plate portion extending in the axial direction from the gripping arm portion, and a right angle with respect to the axial direction from the tip of the elastic plate portion. An engaging portion projecting outward, and the engaging portion is locked to a locking portion provided on an inner wall of the knob to prevent the plug frame from being removed in the axial direction relative to the knob. It is formed as follows.

  When removing the optical connector plug from the adapter, it is inserted between the inner wall of the knob and the engaging part of the lock plate to press the engaging part toward the stop ring, and the engaging part engages with the engaging part of the knob. It is provided with an extraction key tool for releasing engagement that can be released.

  The knob is provided with a guide key hole portion for inserting the extraction key tool and guiding the tip thereof to the pressing surface portion of the lock plate. The key hole shape of the guide key hole portion is the extraction key tool. It is formed so as to correspond to the key groove shape.

  Also, there is provided a removal tool provided with one or more guide protrusions inside the key hole of the guide key hole, and provided with one or more key grooves corresponding to the guide protrusions. Yes.

  ADVANTAGE OF THE INVENTION According to this invention, it can respond to the use which an operator etc. need to remove an optical connector plug arbitrarily, and can remove an optical connector plug only when a person in charge performs key release operation.

  In addition, since the optical connector plug cannot be removed by anyone other than the person in charge of each department, various plug security systems can be constructed.

  In other words, since a lock plate is provided to prevent the knob from moving in the axial direction with respect to the plug frame, it is fully compatible with specifications and applications where it would be difficult for an operator to unplug the optical connector plug without permission. It is possible to construct various optical connector plug security systems in which an optical connector plug cannot be removed (key release) by a person other than the person in charge of each department such as a company or office.

  The lock plate includes a gripping arm portion fitted on the stop ring, an elastic plate portion extending in the axial direction from the gripping arm portion, and a right angle with respect to the axial direction from the tip of the elastic plate portion. An engaging portion projecting outward, and the engaging portion is locked by a locking portion provided on the inner wall of the knob to prevent the plug frame from being removed in the axial direction relative to the knob. Therefore, it is possible to reliably prevent unnecessary removal of the optical connector plug.

  Also, when removing the optical connector plug from the adapter, it is inserted between the inner wall of the knob and the engaging part of the lock plate to press the engaging part toward the stop ring, and the engaging part with respect to the engaging part of the knob is Since it is equipped with a removal key tool for disengagement that can be disengaged, the optical connector plug can be attached only by inserting the removal key tool when it is necessary to remove the optical connector plug from the adapter. It can be easily removed from the adapter.

  The knob is provided with 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 of the extraction key tool. Since it is formed so as to correspond to the 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.

  Thus, by preparing a plurality of optical connector plugs having various key hole shapes and extraction key tools having various key groove shapes corresponding to the key hole shapes, it is possible for a person other than the owner of the extraction key tool. Key release can be prevented.

Also, there is provided a removal tool provided with one or more guide protrusions inside the key hole of the guide key hole, and provided with one or more key grooves corresponding to the guide protrusions. Therefore, 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 disassembled perspective view of the optical connector which shows one form for implementing this invention. The state after an optical connector is assembled is shown, (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 of the optical connector plug before knob attachment. It is the perspective view which looked at the whole structure of the lock plate from the lower side. Similarly, an example of the lock plate is shown, (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 adapter and the optical connector are shown in a fitted state, (a) is a partial plan sectional view, and (b) is a partial side sectional view. The state which inserted the key tool for extraction in the key hole of a knob is shown, (a) is a partial plane sectional view, (b) is a partial side sectional view. The key tool for extraction is pushed in, and the state where the knob is unlocked is shown, (a) is a partial plan sectional view, and (b) is a partial side sectional view. The knob is retracted, and the adapter is unlocked. (A) is a partial plan sectional view and (b) is a partial side sectional view. The state which extracted the optical connector from the adapter is shown, (a) is a partial plane sectional view, (b) is a partial side sectional view. It is a perspective view of a knob and an extraction key tool. The detail of the lock part by a lock plate is shown, (a) is an expanded partial sectional view of a locked state, (b) inserts the key tool for extraction in a key hole, and the engaging part deformed inward It is an expanded sectional view of a state. 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 longitudinal cross-sectional view which shows the combined state by the key person's key tool in FIG. 13, (b) is the responsibility level in FIG. 1 is a longitudinal sectional view showing a combination state with a key tool of No. 1, (c) is a longitudinal sectional view showing a combination state with a key tool of responsibility level 2 in FIG. 13, and (d) is a key tool of responsibility level 3 in FIG. It is a longitudinal cross-sectional view which shows the combination state by. The details of the lock state of the knob by the lock plate are shown, (a) is a rear view of the optical connector, (b) is a sectional view taken along the line AA of (a), and (c) is a sectional view taken along the line BB of (a). is there. An example in which the position of the guide key hole is changed with reference to the protrusion position of the knob is shown. (A) is a perspective view when the guide key hole is provided on the protrusion-side plane of the knob, and (b) is an illustration. FIG. 4C is a perspective view when the guide key hole is provided on the left side of the knob with respect to the protrusion position, and FIG. 5C is a perspective view when the guide key hole is provided on the right side of the knob with respect to the protrusion position. is there.

Hereinafter, an embodiment of an optical connector according to the present invention will be described in detail with reference to the drawings.
The optical connector according to the present invention is a slider lock mechanism in which the knob and the plug frame, which are features of the SC connector, move separately to release the adapter lock (see FIG. 10).

  That is, in this optical connector P, as shown in FIGS. 1 to 3, the plug frame 12 incorporating the ferrule 11 with the flange 11a into which the vicinity of the tip of the optical fiber is inserted, and the rear end side of the ferrule 11 are inserted. , A stop ring 14 fitted into the rear end portion of the plug frame 12 via a spring 13, a kevlar fixing caulking ring 15 fitted to the rear end side of the stop ring 14, and a rear end of the caulking ring 15 The outer ring fixing ring 16 attached to the side, the caulking ring 15 and the boot 17 fitted to the rear end side of the stop ring 14 so as to cover the ring 16, and the plug frame 12 are inserted and stored from the front end side. It has a rectangular tube shaped knob 18 to be arranged.

  The slide lock mechanism employs a conventionally known push-on type fastening structure, and can be coupled or detached by simply pushing or pulling the optical connector plug P into an adapter 31 described later.

  That is, when the optical connector plug P is pushed into the adapter 31, a lock portion 38 of a locking arm 37, which will be described later, in the adapter 31 is pushed wide by the knob 18 of the optical connector plug P and further pushed into the lock portion 38. Is engaged and locked (coupled) to an engaging portion 39 described later. Further, when the knob 18 is pulled out from the adapter 31, the knob 18 pushes the lock portion 38 of the locking arm 37 of the adapter 31 while sliding backward with respect to the plug frame 12 to release the lock, and further pulls out. Thus, the optical connector plug P can be detached from the adapter 31. That is, both ends of the lock portion 38 ride on a pair of upper and lower inclined surface portions 45 (see FIGS. 1, 2B, and 11) of the engaging opening 46 formed at the symmetrical position of the knob 18. The lock is released, whereby the optical connector P is pulled out from the adapter 31.

  A groove-shaped peripheral wall sandwiched between a pair of front and rear annular flanges at a substantially central portion of the stop ring 14 is used as a mounting portion 14a of a lock plate 21 described later, and a rear flange is provided on the stop ring 14. The rear end side is a locking portion of the boot 17 fitted together with the caulking ring 15. The lock plate 21 is a mechanism for preventing the movement of the tab 18 of the plug frame 12 in the axial direction when the plug frame 12 is inserted into the tab 18. That is, the lock plate 21 is provided so that the knob 18 cannot be retracted in the axial direction so that the adapter 31 cannot be unlocked.

  Specifically, as shown in FIGS. 4 and 5, the lock plate 21 is fitted in the mounting portion 14 a of the stop ring 14 so as to be externally fitted and gripped in the diameter increasing direction via the central groove 26. A substantially C-ring-shaped gripping arm portion 21a that can be bent, an elastic plate portion 21b that is integrally extended along the axial direction from the base side surface of the gripping arm portion 21a, and a shaft that extends from the tip of the elastic plate portion 21b. A step-shaped engaging portion 22 projecting outward at a right angle with respect to the direction and a central protruding portion 21 c connected to the engaging portion 22 are provided. Further, the surface of the elastic plate portion 21b on the side opposite to the position of the engaging portion 22 is recessed in an arc shape in cross section and is thinned to give elasticity. Further, when the gripping arm portion 21a is fitted into the mounting portion 14a of the stop ring 14 and the elastic plate portion 21b is bent and deformed toward the stop ring 14, the elastic plate portion 21b itself contacts the outer wall of the boot 17 and is deformed. It doesn't get in the way.

  The protrusion 21c has a vertical locking surface portion 22a, a tapered pressing surface portion 23, and a narrow top surface portion 24, and is formed in a substantially right trapezoidal shape when viewed from the side. Yes. Further, notches 25 a and 25 b are formed on both the left and right sides of the protrusion 21 c and connected to the engagement portion 22.

  On the other hand, a guide key hole 41 for inserting the extraction key tool 51 is provided on one side (lower surface side) of the knob 18. When the plug frame 12 is inserted into the knob 18 as shown in FIGS. 6 (b), 12 (a), 15 (a), 5 (b), and 15 (c). The engaging portion 22 of the lock plate 21 is engaged with engaging portions 31d and 31d formed on both sides inside the guide key hole 41 of the knob 18 on both sides thereof, so that the knob 18 is connected to the plug frame 12. It is designed to prevent it from moving backward in the axial direction.

  That is, the upper wall surface inside the guide key hole portion 41 of the knob 18 is recessed as a rectangular cutout portion 31e, and a rectangular concave guide having a narrower width than the rectangular cutout portion 31e at the center in the back side. A recess 31f is provided, and the locking portions 31d and 31d described above are formed on both sides between the rectangular cutout 31e and the guide recess 31f. When the plug frame 12 is inserted into the tab 18, both sides of the engaging portion 22 are engaged with both locking portions 31 d and 31 d of the tab 18, so that the tab 18 extends in the axial direction of the plug frame 12. When the both sides of the locking portion 22 are pushed upward and downward from the locking portions 31d and 31d by the removal key tool 51 inserted in the guide key hole portion 41, the knob is prevented. 18 can move backward in the axial direction of the plug frame 12.

  That is, as shown in FIG. 7B, when the removal key tool 51 is inserted into the guide key hole 41 of the knob 18, the tip of the key tool 51 is pressed against the protrusion 21 c of the lock plate 21. As shown in FIG. 8B and FIG. 12B, when the inclined portion 52 formed at the tip of the removal key tool 51 is in pressure contact with the pressing surface portion 23 while being guided to the surface portion 23 side, When the elastic plate portion 21b is bent, the engaging portion 22 is displaced to the stop ring 14 side, and both sides of the engaging portion 22 are released upward from the locking portions 31d and 31d of the knob 18 so that the lock on the knob 18 is released. It has come to be.

  Thus, when the optical connector P is pulled out, the knob 18 can be retracted by inserting the removal key tool 51 and pushing the projection 21c of the lock plate 21 to release the lock part of the engaging part 22. Can be removed from the adapter 31 in the same manner as a normal SC connector.

  As shown in FIGS. 6 (a), 7 (a), 8 (a), 9 (a), and 10 (a), the adapter 31 includes an upper wall, left and right side walls, a bottom wall, and one partition. The housing 31a is formed integrally with a wall, and fitting portions 31b of the optical connector P are opened in the horizontal direction at both ends of the housing 31a.

  One of the pair of left and right joint end walls disposed in the central portion of the housing 31a of the adapter 31 has one cylinder 35 projecting toward the end of the fitting portion and the other joint end wall. The other cylinder 36 protrudes toward the end of the fitting portion 31b, and the cylinders 35 and 36 are engaged with each other by engaging and fixing the joining end walls with the central axis on the optical axis. A holder 32 is formed. At this time, a cylindrical split sleeve 33 is mounted and held inside the sleeve holder 32.

  Furthermore, a pair of locking arms 37 extending on both sides with both cylinders 35 and 36 as the center are provided inside the housing 31a of the adapter 31. The pair of locking arms 37 are integrally formed with the central cylinders 35 and 36 through a base portion disposed at the base thereof. A hook-like lock portion 38 that protrudes inward toward both the cylinders 35 and 36 is formed at the distal end portion of each locking arm 37 and is formed on the left and right side surfaces of the plug frame 12 to be inserted. A lock portion 38 of each locking arm 37 is engaged with the joint portion 39.

  1, 2, 6 (b), 7 (b), 8 (b), and 9 (b), a protrusion 18 a is formed on the other side (upper surface side) of the knob 18. The guide of the optical connector P and its insertion direction are regulated by being formed and engaging with the groove 31c of the housing 31a of the adapter 31.

  The optical connector P having the above-described configuration is configured so that the optical connector P cannot be removed from the adapter 31 unless an extraction key tool 51 described later is used after the adapter 31 is mounted. That is, as shown in FIG. 11, the extraction key tool 51 has a flat arm portion 54 protruding from a handle 53, and an inclined portion 52 is formed on the lower surface side of the tip of the arm portion 54. A flat concave key groove 57 is formed on one surface (upper surface in the drawing) of the portion 54 (see the key tool 51 for the general manager described later). Then, the key groove 57 of the arm portion 54 of the removal key tool 51 is inserted into the guide key hole 41 in alignment with the guide protrusion 44 formed in the guide key hole 41.

  At this time, as shown in FIG. 10B, when the handle 53 is pushed in until it is locked to the rear opening edge of the guide key hole portion 41, the tip of the arm portion 54 (inclined portion 52). Is inserted between one inner wall of the knob 18 and the pressing surface portion 23 of the protrusion 21c, while the protrusion 21c itself is pressed and deformed inward (stop ring 14 side) by the inclined portion 52. The engagements on both sides of the engagement portion 22 of the lock plate 21 with respect to the 18 engagement portions 31d and 31d are released.

  When the outer shape of the arm portion 54 of the removal key tool 51 does not exactly match the inner shape of the guide key hole portion 41 (the position and number of the guide protrusion 44), the guide key hole portion 41 Since the arm portion 54 cannot be inserted, the optical connector plug 11 cannot be removed from the adapter 31.

  In the present embodiment, the guide key hole 41 is provided on the surface (lower surface side) opposite to the protrusion 18a side of the knob 18. However, the guide key hole 41 is provided on the basis of the protrusion 18a of the knob 18. You may change a position suitably. For example, FIG. 16A shows a case where the guide key hole 41 is provided on the projection 18a side plane of the knob 18, and FIG. 16B shows the guide key hole 41 with respect to the position of the projection 18a. (C) is a case where the guide key hole 41 is provided on the right side of the knob 18 with respect to the position of the protrusion 18a.

Next, an example of use / operation of the configuration configured as described above will be described.
First, the knob 18 is held with fingers, and the optical connector plug P is attached to one fitting portion 31 b of the adapter 31. At this time, as shown in FIGS. 1, 2, and 6 (b), the protrusion 18 a of the knob 18 engages with the groove 31 c of the housing 31 a of the adapter 31, and at the same time, the engaging portions 39 on the left and right side surfaces of the plug frame 12. The lock portion 38 of the adapter 31 is engaged with
That is, when the optical connector plug P is pushed into the adapter 31, the lock portion 38 of the locking arm 37 in the adapter 31 is pushed and widened by the knob 18 of the optical connector plug P, and further, the lock portion 38 is engaged with the plug frame 12. Engage with and lock (couple) the joint 39.

  Further, in this locked state, the engaging portion 22 of the lock plate 21 has a pair of left and right engaging portions 31d provided at intervals above the rectangular cutout portion 31e of the guide key hole portion 41 of the knob 18 on both sides thereof. The plug frame 12 is engaged with 31d to prevent the plug frame 12 from retreating in the axial direction with respect to the knob 18 (see FIGS. 12A and 15C).

  When the optical connector plug P is removed from the adapter 31, as shown in FIGS. 7B, 8B, and 12B, the arm portion 54 of the removal key tool 51 is inserted into the guide key hole portion 41. The handle 53 is pushed in until it is locked to the rear opening edge of the guide key hole 41. At this time, the tip of the arm portion 54 (inclined portion 52) is inserted between the inner wall on one side of the knob 18 and the pressing surface portion 23 of the protruding portion 21c, while the protruding portion 21c itself is moved inward (stop ring 14) by the inclined portion 52. The engagement portion 22 of the lock plate 21 with respect to the locking portion 31d of the knob 18 is thereby released in the vertical direction.

  Thus, as shown in FIG. 9A, the knob 18 pushes and widens the locking portion 38 of the locking arm 37 of the adapter 31 while sliding backward with respect to the plug frame 12, and further pulls it out. Thus, the optical connector plug P is detached from the adapter 31 and the optical connector P is removed from the adapter 31 to the front.

  In addition, by forming the extraction key tool 51 having various different key grooves 57 in the guide key hole portion 41, it is possible to determine the range in which the key can be operated according to the responsibility level.

  That is, as shown in FIG. 13, for example, the extraction key tool 51 owned by the general manager has a flat arm portion 54 protruding from the handle 53, and a wide flat concave surface at the center of one surface of the arm portion 54. Key groove 57 is formed. The removal key tool 51 owned by the general manager has a guide protrusion 44 formed in the guide key hole 41 in the center corresponding to the groove width of the key groove 57. When the three elongated guide ridges 44 are juxtaposed at equal intervals corresponding to the groove width of the key groove 57, the two guide ridges 44 extend over the groove width of the key groove 57 on one side. When juxtaposed, it is possible to cope with all cases where there is one elongated guide protrusion 44 at the center, and key operation becomes possible.

  Further, in the case of responsibility level 1, three elongated groove-like key grooves 57 are formed at the center of one surface of the arm portion 54. In the extraction key tool 51 owned by the person in charge of level 1, the guide protrusion 44 formed in the guide key hole 41 corresponds to the central groove width of these three key grooves 57. If there are one guide protrusion 44 in the center and two guide protrusions 44 are juxtaposed on one side so as to span the groove width of the two key grooves 57, the three elongated guide protrusions 44 are provided in the three key grooves. The keys can be operated in correspondence with the case where the grooves are arranged in parallel at equal intervals corresponding to the respective groove widths 57.

  In the case of responsibility level 2, two key grooves 57 are formed in the center of one surface of the arm portion 54, and only the arm portion 54 on one side via the key groove 57 is wide. In the extraction key tool 51 owned by the person in charge of level 2, the guide protrusion 44 formed in the guide key hole 41 corresponds to the central groove width of the two key grooves 57. When there is one at the center, it is possible to cope with a case where two guide protrusions 44 are arranged side by side so as to span the widths of the two key grooves 57 on one side.

  In the case of responsibility level 3, one narrow key groove 57 is formed at the center of one surface of the arm portion 54. In the extraction key tool 51 owned by the person in charge of level 3 as described above, the guide protrusion 44 formed in the guide key hole 41 has a center corresponding to the groove width of the single key groove 57. Only when there is one, etc., the key operation is possible.

  FIG. 14 is a cross-sectional view showing a state in which the extraction key tool 51 is inserted into the guide key hole 41 so as to correspond to FIG. 13, and FIG. 14A shows the extraction key tool 51 owned by the general manager. The longitudinal cross-sectional view in the state inserted in the guide key hole part 41 which has the guide protrusion 44, (b) is the key for guide which has the guide key 44 for the 3rd extraction key tool 51 which the person in charge of level 1 owns The longitudinal cross-sectional view of the state inserted in the hole 41, (c) is a longitudinal section of the state in which the extraction key tool 51 owned by the person in charge of level 2 is inserted into the guide key hole 41 having two guide protrusions 44 FIG. 6D is a longitudinal sectional view of a state in which the extraction key tool 51 owned by the person in charge of level 3 is inserted into the guide key hole 41 having one guide protrusion 44.

  In this way, by making the shape, arrangement, and number of the guide key hole 41 correspond to the shape, arrangement, and number of the key groove 57 of the extraction key tool 51, the extraction key tool 51 according to each responsibility level (position). The optical connector security system can be constructed so that keys other than those responsible for each level (department) cannot be released.

P Optical connector 11 Ferrule 12 Plug frame 13 Spring 14 Stop ring 14a Mounting portion 15 Caulking ring 16 Ring 17 Boot 18 Knob 18a Protrusion 21 Lock plate 21a Holding arm portion 21b Elastic plate portion 21c Protrusion portion 22 Engaging portion 22a Locking surface portion 23 Press surface portion 24 Top surface portions 25a, 25b Notch portion 26 Groove 31 Adapter 31a Housing 31b Fitting portion 31c Groove portion 31d Locking portion 31e Rectangular notch portion 31f Guide recess 32 Sleeve holder 33 Split sleeve 35, 36 Cylinder 37 Locking arm 38 Locking portion 39 Engagement part 41 Guide key hole 44 Guide protrusion 45 Inclined surface part 46 Engagement opening 51 Extraction key tool 52 Inclination part 53 Handle 54 Arm part 57 Key groove

Claims (5)

  A plug frame with a built-in ferrule inserted near the tip of the optical fiber, a stop ring inserted at the rear end of the ferrule and inserted into the rear end of the plug frame via a spring, and the plug frame on the front side An optical connector plug that has a knob that is inserted and stored and is movable separately, and the lock of the adapter can be unlocked, and the movement of the knob in the axial direction relative to the plug frame An optical connector provided with a lock plate for preventing this.   The lock plate includes a gripping arm portion fitted on the stop ring, an elastic plate portion extending in the axial direction from the gripping arm portion, and outwards perpendicular to the axial direction from the tip of the elastic plate portion. And the engaging portion is locked to a locking portion provided on the inner wall of the knob so as to prevent the plug frame from being removed in the axial direction with respect to the knob. The optical connector according to claim 1.   When removing the optical connector plug from the adapter, it is inserted between the inner wall of the knob and the engaging part of the lock plate to press the engaging part toward the stop ring, and the engaging part engages with the engaging part of the knob. The optical connector according to claim 2, further comprising an extraction key tool for releasing engagement that can be released.   The knob is provided with a guide key hole portion for inserting the extraction key tool and guiding the tip to the pressing surface portion of the lock plate, and the key hole shape of the guide key hole portion is the key of the extraction key tool. The optical connector according to claim 3, wherein the optical connector is formed so as to correspond to a groove shape.   An extraction tool having one or a plurality of guide protrusions provided inside the key hole of the guide key hole portion and one or a plurality of key grooves corresponding to each guide protrusion is provided. 4. The optical connector according to 4.

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