JP6449558B2 - Adapter with shutter for MU type optical connector - Google Patents

Description

  The present invention relates to an adapter with a shutter for a MU type optical connector having a built-in dustproof shutter for interconnecting a pair of opposing MU type optical connector plugs.

  Conventionally, as shown in FIG. 8C (conventional example of the present application), a support shaft 15 is integrally formed at the lower end so that the fitting portion A is closed from the inside in an oblique arrangement with the fitting portion A of the connector housing 1. A shutter plate 11 having both ends of the support shaft 15 rotatably supported on the lower portion of the fitting portion A of the connector housing 1, and a plate spring 18 for urging the shutter plate 11 in the closing direction. There has been proposed an optical connector adapter which is arranged and configured to open the shutter plate 11 against the pressing force of the leaf spring 18 by fitting an optical connector plug to the fitting portion A of the connector housing 1. Yes.

  In addition, as shown in Patent Document 1, which is a prior application by the present applicant, a key groove having a linear groove along the optical axis direction is formed at the inner center of the upper side wall of the connector housing, and corresponds to the key groove. When the shutter plate is obliquely arranged and the fitting portion is closed, the key groove is sealed from the inside by the convex portion of the shutter plate. The shutter plate guides the optical connector to be fitted into the fitting portion of the connector housing, and for the SC type optical connector in which guide members are provided on both upper sides of the front of the shutter plate so as to hold the shutter plate in a horizontal position. A plug has been proposed.

  Further, as shown in Patent Document 2 which is a prior application by the present applicant, a ferrule, a holder for fixing the ferrule to the tip, a stop ring fitted to the rear end of the holder, the holder and the stop ring around the axis There has been proposed a plug for an MU type optical connector that includes a knob that is inserted and held so as to be rotatable in a direction, and a coil spring that is interposed between the holder and the stop ring and biases a ferrule integral with the holder forward.

Japanese Patent No. 4824608 JP 2004-184723 A (see FIG. 9)

  By the way, in order to mutually connect a pair of MU type optical connector plugs according to Patent Document 2 described above, an adapter having a connector housing having an integrated structure with openings at both ends capable of receiving bidirectional MU type optical connector plugs. When the shutter plate is incorporated in the connector housing, the MU type optical connector plug knob itself has many key portions for determining the direction, so that the shutter plate is moved in the closing direction by the leaf spring. If the connector housing itself is made to be a substantially sealed type in the biased state, there is a problem that the shape of the shutter plate becomes complicated according to the shape of the key.

  That is, as shown in FIGS. 8 (a), 8 (b), and 8 (c), the MU type optical connector plug P1 is guided in a proper orientation in the fitting portion A of the connector housing 1. In order to make this happen, there are convex guide keys 102, 103a, 103b for direction determination at the upper center of the knob 101 and on both the left and right sides. Corresponding to these guide keys 102, 103 a, 103 b, insertion guide key grooves 22, 23 a, 23 b are formed at the upper center and the left and right sides of the fitting part A of the connector housing 1. , 23a and 23b, the shape of the shutter plate 11 becomes complicated.

  Further, as shown in FIG. 8 (c), a cylinder 25a on which a cylindrical split sleeve 24 is mounted and held projects toward one fitting portion A, as shown in FIG. In the case of an adapter with a shutter for the MU type optical connector, the right and left of the plug for the MU type optical connector (knob 101) inserted into the fitting portion A on the inner wall of the connector housing 1 at the symmetrical position in the front view of the cylinder 25a. Since the pair of left and right latch pieces 26 protrudes inwardly toward each other in a front view to be suspended in the locking recess 104 formed on the side surface, When the shutter plate 11 is rotated in the opening direction, the shutter plate 11 interferes with the base of the latch piece 26.

  Furthermore, in the case of the SC type optical connector plug shown in Patent Document 1, the guide key 102 for determining the direction is simply provided on a part of the upper surface of the knob 101, and the shutter plate 11 is accordingly changed accordingly. The shape can also be simplified, but this also has a problem that when the shutter plate 11 is rotated in the opening direction by the fitting of the plug, the shutter plate 11 interferes with the inner cylinder 25a of the connector housing 1. It was.

  Thus, in order to avoid such interference between the shutter plate 11 and the base of the latch piece 26, the length of the fitting portion A of the connector housing 1 is increased so that the position of the shutter plate 11 is on the front side. Therefore, there is a problem that the entire length of the MU type optical connector adapter is increased.

Therefore, the present invention has been devised in view of the conventional circumstances as described above. In the upper center of the MU type optical connector plug knob and on both the left and right sides, it is used as a guide key for ridges for direction determination. A shutter plate having a corresponding shape and having an adapter with a shutter for the MU optical connector itself that is substantially hermetically closed when the shutter is pivoted. When the shutter plate is pivoted to the open side, dust can surely enter the connector housing. At the same time, even if the length of the MU optical connector adapter is small, it is possible to avoid interference with the latch piece when the shutter plate is pivoted to the open side. An object is to provide an adapter with a shutter.

In order to solve the above-described problems, in the present invention,
One end provided with a fitting portion of one of the MU-type optical connector plugs, and interior one end of the split sleeve is fitted holding the ferrule tip of the one MU-type optical connector plug to be inserted from the fitting portion projecting one cylinder is toward the fitting portion of the MU-type optical connector plug of the one to the locking formed in the left and right side surfaces of the knob of the MU-type optical connector plug inserted into the fitting portion A connector housing in which a pair of left and right latch pieces to be suspended in the recess are projected in an inclined manner toward each other;
The connector housing is formed by a casing having a locking piece for fixing a panel inserted from the opening side of the other end of the connector housing, and has a fitting portion for the other MU type optical connector plug at one end. The other cylinder that mounts and holds the ferrule tip of the other MU-type optical connector plug inserted from the part and that houses the other end of the split sleeve is the fitting part of the other MU-type optical connector plug. It is headed projecting pair of left and right latch pieces for keeping Kakarika the engagement recess formed in the left and right side surfaces of the knob of the other MU-type optical connector plug inserted into the fitting portion to each other A sleeve holder that is inclined and projecting inward,
Is urged in the closing direction by a leaf spring so as to close the fitting portion is arranged obliquely into the fitting portion of one of the MU-type optical connector plug of said connector housing, said one of the MU-type optical connector from the fitting portion A shutter plate that is inserted against the pressing force of the leaf spring by inserting a plug for use, and
An adapter with a shutter for a MU type optical connector comprising:
The shutter plate is a fitting portion of the one MU type optical connector plug for guiding direction determining guide keys formed at the upper center and lower left and right sides of the knob of the one MU type optical connector plug. top center and to respond to the key groove for insertion guide formed on the lower left and right sides, by forming the protrusions at the top center and bottom right and left sides of the shutter plate, the connector housing when closed rotation of the shutter plate While making itself a substantially sealed type,
The shutter plate is formed with a notch portion so as to be continuous with the upper central protrusion on the left and right sides of the upper portion of the shutter plate so that contact with the latch piece can be avoided when the shutter plate rotates on the open side.
Side surfaces of the movable portion of the shutter plate including notches on both the left and right sides of the upper part and protrusions on the left and right sides of the lower part of the shutter plate are arranged in two fan-shaped recesses inside the left and right side walls of the connector housing. The shutter plate itself swings in the opening and closing direction while engaging with the
The left and right sides and the center upper side of the front surface of the shutter plate are formed with recesses for preventing dust adhering to the front surface of the shutter plate from entering the connector housing .

According to the present invention, an adapter with a shutter for a MU type optical connector has a shape corresponding to the guide key of the convex stripe for direction determination at the upper center and both the left and right sides of the knob of the plug for the MU type optical connector and is closed and rotated. In the shutter plate which is itself substantially hermetically sealed , dust can be reliably prevented from entering the inside of the connector housing when the shutter plate is pivoted to the open side, and at the same time, the length of the entire MU type optical connector adapter can be reduced. Even if it is small, it is possible to avoid interference with the latch piece when the shutter plate is pivoted on the open side.

In other words, in the present invention, the shutter plate 11 guides the guide keys 102, 103a, 103b for direction determination formed at the upper center and lower left and right sides of the knob 101 of the one MU type optical connector plug P1. The upper center of the shutter plate 11 and the upper center of the shutter plate 11 and the insertion guide key grooves 22, 23 a, 23 b formed on the left and right sides of the fitting portion A of the one MU type optical connector plug P 1. By forming the protrusions 32 on the left and right sides of the lower part, the connector housing 1 itself is substantially sealed when the shutter plate 11 is closed and rotated.
The shutter plate 11 is formed with notches 33 so as to be continuous with the protrusions 32 at the upper center on both the left and right sides of the upper portion of the shutter plate 11 so as to avoid contact with the latch piece 26 when the shutter plate 11 is rotated on the open side. And
Side surfaces of the movable part of the shutter plate including the notches 33 on both the left and right sides of the upper part and the protrusions 32 on the left and right sides of the lower part of the shutter plate are fan-shaped in two stages inside the left and right side walls of the connector housing. Since the shutter plate itself swings in the opening and closing direction while engaging in the recess,
When the shutter plate 11 is rotated on the opening side, dust can be reliably prevented from entering the connector housing 1 through the recess 11b. That is, since the side surface of the movable portion of the shutter plate 11 is always in contact with the recess portion 11b, the shutter plate 11 can swing smoothly in the opening and closing direction, and in the closed state, there are key grooves 23a and 23b on the left and right sides of the lower portion. In addition, it is possible to reliably prevent the dust from entering the connector rising 1.

At the same time, when the shutter plate 11 is rotated on the open side, the shutter plate 11 can be rotated without the shutter plate 11 and the latch piece 26 being brought into contact with each other by the cutout portion 33, whereby the MU type optical connector can be rotated. Even if the overall length of the adapter with a shutter is small, interference with the latch piece 26 can be avoided in advance.

Further, on both the left and right sides and the center upper side of the front surface of the shutter plate 11, a recess 31 for preventing dust adhering to the front surface of the shutter plate 11 from entering the connector housing 1 is formed. Therefore, the amount of dust entering the connector housing 1 stays in the recess 31 and the function of preventing entry into the connector housing 1 is greatly improved.

It is a disassembled perspective view of the adapter with a shutter for MU type optical connectors which shows one form for implementing this invention. Similarly, the state where the connector housing, the sleeve holder, and the shutter plate of the adapter with a shutter for the MU type optical connector are assembled is shown, (a) is a perspective view and (b) is a longitudinal sectional view. Similarly, the connector housing, the sleeve holder, and the shutter plate of the adapter with a shutter for the MU type optical connector are shown assembled, where (a) is a right side view and (b) is a cross-sectional view. An example of a structure of a connector housing is shown, (a) is a right view, (b) is a cross-sectional view. An example of a structure of a sleeve holder is shown, (a) is a right view, (b) is a cross-sectional view. 1 shows an example of the configuration of a shutter plate, (a) is a perspective view, (b) is a front view, (c) is a right side view, (d) is a rear view, and (e) is an A- of (b). It is A sectional drawing. Similarly, the process of inserting the optical connector into the adapter with the shutter for the MU type optical connector will be described. (A) is a central longitudinal sectional view before the insertion, and (b) is tilted when the shutter plate is pushed by the insertion. FIG. Furthermore, the insertion process of the optical connector to the adapter with a shutter for the MU type optical connector will be described. (C) is a central longitudinal sectional view of the inserted state, and (d) is a central longitudinal sectional view of the state after the insertion. FIG. It shows a conventional example, (a) is a perspective view of a plug for MU type optical connector, (b) is a front view of a plug for MU type optical connector, (c) is a central longitudinal section of an adapter with a shutter for MU type optical connector. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
In this embodiment, as shown in FIG. 7, an adapter Q with a shutter for a MU type optical connector (hereinafter, referred to as a plug body for a MU type optical connector) (hereinafter abbreviated as a plug body) is connected. 1 to 5, the adapter main body Q includes a connector housing 1 provided with a fitting portion A of one plug main body P1 at one end, and one end at the other end, as shown in FIGS. The sleeve holder 21 having the fitting part B of the other plug body P1 (not shown) and the plug body P1 are inserted from the fitting part A and opened against the pressing force of the leaf spring 18 described later. And a shutter plate 11.

  As shown in FIGS. 8A and 8B in the above-described conventional example, the plug body P1 includes a ferrule 105 in which a holder is fitted and fixed to the rear end, a coil spring (not shown), A stop ring (not shown) and a knob 101 are used as main members. The ferrule 105 is bonded and fixed by inserting an optical fiber from which the coating at the tip of the optical fiber cable is peeled off into a minute hole formed through the shaft. Further, on the left and right side surfaces of the knob 101 of the plug main body P1 inserted into the fitting portion A, a locking recess 104 for suspending a pair of left and right latch pieces 26 (to be described later) of the connector housing 1 is formed. (See FIG. 8A). Further, guide keys 102, 103a, 103b for determining the direction at the time of mounting and fitting to the connector housing 1 are formed on the upper center and lower left and right sides of the knob 101 (FIGS. 8A and 8B). )reference).

  By forming the knob 101 in this manner, the tip of the ferrule 105 fixed to the holder tip is projected forward at the axial center position in the fitting hole of the knob 101. That is, between the two fitting holes of the knob 101, a hook locking step (not shown) of the holder is formed, and the other end is locked to the stop ring locking rod. Thus, the collar portion is locked to the locking step portion so that the ferrule 105 protrudes forward by the elastic force of the coil spring that is extrapolated and held in the guide tube at the rear end of the holder. When the ferrule 105 comes into contact with the other ferrule 105 and receives a pressing force at the time of connection, the ferrule 105 moves backward in the fitting hole of the knob 101 together with the holder against the elastic force of the coil spring. ing.

  As shown in FIGS. 1, 2, 3, and 4, the connector housing 1 is integrally formed in a box shape with an upper side wall 1a, left and right side walls 1b, and a bottom wall 1c. The fitting part A which can insert the plug main body P1 is provided at one end. A part of the bottom wall 1c is fitted to the left and right side walls 1b so that a shutter plate 11 to be described later can be attached. The other end of the connector housing 1 is a rectangular cylindrical opening D for inserting a sleeve holder 21 formed by a rectangular casing provided with a locking piece K for fixing the panel. A horizontally long slit S for inserting the locking piece K of the sleeve holder 21 is formed from the end of the opening D to the left and right sides. Further, on the upper center and lower left and right sides of the fitting portion A of the connector housing 1, guide keys 102, 103a, 103b for direction determination formed on the upper center and lower left and right sides of the knob 101 provided on the plug body P1 are provided. Key grooves 22, 23a, 23b for insertion guides for guiding are formed. A mounting flange L having a mounting hole at the center is formed in the middle of the left and right side walls 1b of the connector housing 1.

  Further, one joining end wall 3a is arranged at the center of the connector housing 1, and the tip end of the ferrule 105 of the plug body P1 inserted from the fitting part A is provided on the joining end wall 3a. One cylinder 25a for mounting and holding in an outer fitting shape and accommodating one end side (half the full length) of the cylindrical split sleeve 24 projects toward one fitting portion A. Furthermore, a pair of left and right latch pieces for hanging on the left and right inner walls of the connector housing 1 in a locking recess 104 formed on the left and right side surfaces of the knob 101 of the plug body P1 inserted into the fitting portion A. 26 project from each other so as to be inclined inward.

  As shown in FIGS. 1, 2, 3, and 5, the sleeve holder 21 is formed integrally with a top wall 21a, left and right side walls 21b, and a bottom wall 21c in a substantially U-shaped frame shape when viewed from the front. In addition, a fitting portion B is provided at one end so that the other plug main body P1 (not shown) can be inserted. Further, the left and right side surfaces of the sleeve holder 21 are provided with a locking piece K in the form of a spring piece for fixing the panel, and the slit portion of the connector housing 1 extends from the base of the locking piece K to the fitting portion B. A pair of upper and lower protrusions 27 are formed in a substantially rectangular shape to be inserted into and engaged with S. Similarly to the fitting portion A of the connector housing 1, the upper center and lower left and right sides of the fitting portion B of the connector housing 1 are located at the upper center and lower left and right sides of the knob 101 provided in the plug body P1. Insertion guide key grooves 22, 23a, 23b for guiding the direction determining guide keys 102, 103a, 103b formed on both sides are formed.

  Further, the other end of the sleeve holder 21 is closed by the other joining end wall portion 3b, and the tip end of the ferrule 105 of the other plug body P1 inserted from the fitting portion B is connected to the joining end wall portion 3b. The other cylinder 25b for projecting the other part of the cylindrical split sleeve 24 (the other half of the total length) protrudes toward the other fitting part B. It is. Similarly to the connector housing 1 described above, the left and right inner walls of the sleeve holder 21 are formed on the left and right side surfaces of the knob 101 of the other plug body P1 (not shown) inserted into the fitting portion B. A pair of left and right latch pieces 26 for hanging on the locking recess 104 are inclined and projecting inward from each other.

  As shown in FIG. 1, an upward inclined portion 1 d is formed at the upper end of one fitting portion A of the connector housing 1 employed in the embodiment described above. The other fitting portion B is also configured to insert the MU type optical connector plug (the plug main body P1).

  The shutter plate 11 is arranged in one fitting portion A of the connector housing 1 so as to be able to open and close the fitting portion A in an oblique arrangement so as to fit the inclined portion 1d. That is, the shutter plate 11 has a support shaft 15 integrally projecting at the lower horizontal position of the shutter plate 11, and projecting portions 15 a provided at symmetrical positions on both ends of the support shaft 15 are fitted into the fitting portion A of the connector housing 1. The shaft hole 16 formed so as to straddle the bottom wall 1c and the left and right side walls 1b at the left and right facing positions at the lower end of the joint is rotatably supported.

  A rectangular opening 17 is formed at the approximate center where the lower end of the shutter plate 11 and the support shaft 15 are connected to each other. The opening 17 is bent into an approximately L shape. The metal plate spring 18 is fitted into the center of the support shaft 15, and one end of the plate spring 18 is formed into a rectangular recess 11a formed on the inner surface of the bottom wall 1c (corresponding to the entire surface of the shutter plate 11). The shutter plate 11 is urged in the closing direction by pressing the other end of the leaf spring 18 against the inner side surface (back surface) of the shutter plate 11.

  When the plug body P1 is inserted into the shutter plate 11 from the slightly upward direction before the fitting portion A of the connector housing 1, the tip of the ferrule 105 (see FIG. 7) does not contact the front surface of the shutter plate 11. A recessed relief portion 30 is formed. That is, the escape portion 30 is recessed in a substantially trapezoidal shape from the front side toward the inside on the upper side of the opening 17 of the shutter plate 11 in order to receive the front end side of the ferrule 105 in a non-contact state (the rear surface of the shutter plate 11 In the shape of a substantially trapezoidal shape). Thus, the escape portion 30 of the shutter plate 11 receives the tip of the ferrule 105 in a non-contact state, and at the same time, the shutter is opened by the edge of the tip of the cylindrical knob 101 provided so as to cover the periphery of the ferrule 105 of the plug body P1. The plate 11 is pushed away and opened.

As shown in detail in FIG. 6, when the plug body P1 is inserted from the fitting portion A and the shutter plate 11 is opened on the left and right sides and the central upper side of the front surface of the shutter plate 11, the shutter plate 11 is opened. 11 A recess 31 is formed in the shape of a rectangular recess for preventing dust or the like adhering to the front surface from entering the connector housing 1. That is, as compared with the case where the front surface of the shutter plate 11 is formed flat, if such a concave portion 31 is provided on the front surface of the shutter plate 11, dust or the like inside the connector housing 1 remains in the concave portion 31. The function of preventing the entry into the minute connector housing 1 is greatly improved. And the insertion formed at the upper center and the lower left and right sides of the fitting part A for guiding the guide keys 102, 103a, 103b of the ridges for determining the direction formed at the upper center and the lower left and right sides of the knob 101. Projections 32 are formed on the upper center and lower left and right sides of the shutter plate 11 so as to correspond to the key grooves 22, 23 a, and 23 b of the guide groove, so that the connector can be connected when the shutter plate 11 is closed and rotated. The housing 1 itself is a substantially sealed type. Furthermore, a notch 33 is formed on both the upper left and right sides of the shutter plate 11 (on the left and right shoulder sides via the upper central protrusion 32) so as to be continuous with the upper central protrusion 32, and the shutter plate 11 is opened. Contact with the latch piece 26 can be avoided during side rotation.

  When assembling the sleeve holder 21 to the connector housing 1, first, one end side of the split sleeve 24 is built in either one of the cylinders 25 a and 25 b, and the sleeve holder 21 is inserted from the opening D of the connector housing 1. Then, at the same time as the protrusion 27 is engaged with the slit portion S, one joining end wall portion 3a is joined to the other joining end wall portion 3b. At this time, the other end side of the split sleeve 24 is housed in either one of the cylinders 25a and 25b, and the two cylinders 25a and 25b abut the rear end surfaces via the joint end wall portions 3a and 3b. The cylinders 25a and 25b are arranged so as to protrude in opposite directions. As a result, one split sleeve 24 is inserted into both adjacent cylinders 25a and 25b. Then, after the leaf spring 18 is fitted to the center of the support shaft 15 through the opening 17 of the shutter plate 11, the protrusions 15a at both ends of the support shaft 15 of the shutter plate 11 are connected to the shaft hole 16 of the bottom wall 1c. A pair of side walls 1b disposed on the left and right of the substantially U-shaped upper side wall 1a in the front view are respectively assembled on the bottom wall 1c.

  At this time, as shown in FIG. 2, one end of the leaf spring 18 is pressed against the recess 11 a of the bottom wall 1 c and the other end is pressed against the rear wall surface of the relief portion 30 of the shutter plate 11. Then, it is biased in a substantially inclined state in the direction of closing the fitting end in one fitting portion A. When the shutter plate 11 is opened, one end of the leaf spring 18 is sandwiched between the rear wall surface of the escape portion 30 and the recess 11a of the bottom wall 1c.

Next, an example of the use of the configuration configured as described above will be described.
When the adapter body Q is used, first, as shown in FIG. 7A, before the plug body P1 is fitted into one fitting portion A of the connector housing 1, the shutter plate 11 is substantially L-shaped. The fitting end in one fitting portion A is closed by the elastic force of the mold leaf spring 18 in the expanding direction. At this time, the upper center protrusion 32 of the shutter plate 11 is locked by the upper inner wall of the connector housing 1.

  As shown in FIG. 7B, when the plug body P1 is inserted into the shutter plate 11 from the front side of the fitting portion A of the connector housing 1, the escape portion 30 contacts the front end of the ferrule 105 with the front surface of the shutter plate 11. Without closing, the shutter plate 11 being closed is pushed by the edge of the opening of the cylindrical knob 101 covering the periphery of the ferrule 105, and the shutter plate is placed inside the fitting end against the elastic force of the plate spring 18. 11 tilts.

At this time, the movable part side surface of the shutter plate 11 (the side surface including the upper shoulder side cutout 33 and the lower left and right protrusions 32) has two steps inside the left and right side walls 1 b of the connector housing 1. The shutter plate 11 itself swings in the opening direction (lower side) while engaging in the left and right fan-shaped depressions 11b, but the upper left and right sides of the shutter plate 11 (through the protrusion 32 in the upper center). On the left and right shoulder sides), the notch 33 is formed so as to be continuous with the protrusion 32 at the upper center, so that contact with the latch piece 26 is avoided when the shutter plate 11 is rotated on the open side. That is, since the notch 33 of the shutter plate 11 passes through the root portion of the latch piece 26 when the shutter plate 11 is rotated on the open side, the shutter plate 11 can be rotated when the shutter plate 11 is rotated on the open side even if the entire length of the adapter body Q is small. It does not interfere with the latch piece 26 itself.

  As shown in FIG. 7C, when the plug body P1 is further pushed into the fitting portion A of the connector housing 1, due to the presence of the key grooves 22, 23a, 23b of the fitting portion A of the connector housing 1 described above, With the insertion process, the plug body P1 itself is inserted in a naturally horizontal state.

  As shown in FIG. 7D, when the plug body P1 is completely pushed into the fitting portion A and the ferrule 105 is fitted into the one cylinder 25a, the shutter force is generated by the elastic force of the leaf spring 18. The plug body P1 is firmly clamped between the plate 11 and the upper side wall 1a of the connector housing 1, and the connection work is completed. At this time, one end of the leaf spring 18 is sandwiched between the rear wall surface of the escape portion 30 and the recess 11a of the bottom wall 1c. Thus, the ferrule 105 of the plug main body P1 and the ferrule 105 of another plug main body P1 (not shown) fitted into the adapter main body Q from the other opening portion protrude in the adapter main body Q. Together, both cores are butt-connected.

P1 Plug body Q Adapter body A One fitting part B The other fitting part D Opening part K Locking piece S Slit part L Mounting flange 1 Connector housing 1a Upper side wall 1b Left and right side wall 1c Bottom wall 1d Inclined part 3a, 3b Joint end wall portion 11 Shutter plate 11a Recessed portion 11b Recessed portion 15 Support shaft 15a Protrusion portion 16 Shaft hole 17 Opening portion 18 Plate spring 21 Sleeve holder 21a Upper side wall 21b Left and right side walls 21c Bottom walls 22, 23a, 23b Key groove 24 Split sleeve 25a One cylinder 25b The other cylinder 26 Latch piece 27 Protrusion 30 Escape part 31 Recess part 32 Protrusion part 33 Notch part 101 Knob 102, 103a, 103b Guide key 104 Locking recessed part 105 Ferrule

Claims (1)

One end is provided with a fitting portion of one MU type optical connector plug, the tip end portion of the ferrule of the one MU type optical connector plug inserted from the fitting portion is mounted and held, and one end side of the split sleeve is internally provided One of the cylinders to be projected protrudes toward the fitting portion of the one MU type optical connector plug, and is formed on the left and right side surfaces of the knob of the MU type optical connector plug inserted into the fitting portion. A connector housing in which a pair of left and right latch pieces to be suspended in the recess are projected in an inclined manner toward each other;
The connector housing is formed by a casing having a locking piece for fixing a panel inserted from the opening side of the other end of the connector housing, and has a fitting portion for the other MU type optical connector plug at one end. The other cylinder that mounts and holds the ferrule tip of the other MU-type optical connector plug inserted from the part and that houses the other end of the split sleeve is the fitting part of the other MU-type optical connector plug. A pair of left and right latch pieces projecting toward each other and suspended in locking recesses formed on the left and right side surfaces of the knob of the other MU-type optical connector plug inserted into the fitting portion are mutually connected. A sleeve holder that is inclined and projecting inward,
The MU type optical connector is urged in a closing direction by a leaf spring so as to close the fitting portion in an oblique arrangement within the fitting portion of one MU type optical connector plug of the connector housing, and the one MU type optical connector from the fitting portion. A shutter plate that is inserted against the pressing force of the leaf spring by inserting a plug for use, and
An adapter with a shutter for a MU type optical connector comprising:
The shutter plate is a fitting portion of the one MU type optical connector plug for guiding direction determining guide keys formed at the upper center and lower left and right sides of the knob of the one MU type optical connector plug. In order to correspond to the insertion guide key grooves formed on the upper center and the lower left and right sides of the shutter plate, protrusions are formed on the upper center and the lower left and right sides of the shutter plate. While making itself a substantially sealed type,
The shutter plate is formed with a notch portion so as to be continuous with the upper central protrusion on the left and right sides of the upper portion of the shutter plate so that contact with the latch piece can be avoided when the shutter plate rotates on the open side.
Inside the left and right side walls of the connector housing, the shutter plate has an upper portion formed in a pair of fan-shaped depressions formed on the inner upper side of the side wall, and the lower portion formed on the inner lower side of the side wall. The shutter plate itself swings in the opening and closing direction while engaging with each of the pair of fan-shaped depressions .
A MU for preventing dust adhering to the front of the shutter plate from entering the inside of the connector housing is formed on both the left and right sides and the center upper side of the front surface of the shutter plate. Adapter with shutter for type optical connector.

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