JP6671847B2 - Optical connector and optical cable with connector - Google Patents

Description

  The present invention relates to an optical connector and an optical cable with a connector.

There is known an optical connector system including a receptacle-side optical connector and a plug-side optical connector. When the plug-side optical connector is connected to the receptacle-side optical connector, the plug-side ferrule abuts on the receptacle-side ferrule, thereby realizing optical connection.
Patent Literatures 1 to 4 disclose an optical connector system including a receptacle-side optical connector and a plug-side optical connector.

U.S. Pat. No. 7,881,576 U.S. Pat. No. 6,648,520 U.S. Pat. No. 7,137,742 U.S. Pat. No. 7,572,065

  In Patent Documents 1 to 4, a spring (elastic member) for applying a pressing force to the plug-side ferrule is disposed on the rear side of the plug-side ferrule (opposite to the receptacle-side optical connector), and the plug-side ferrule is retracted. It is configured to be possible. When the connector is connected, the plug-side ferrule abuts against the ferrule of the receptacle-side optical connector, so that the plug-side ferrule moves backward (moves rearward) when the connector is connected. However, such a configuration requires a space for allowing the plug-side ferrule to be retracted, which makes it difficult to reduce the size of the optical connector.

  An object of the present invention is to reduce the size of an optical connector.

A main invention for achieving the above object is a plug-side optical connector connected to a receptacle-side optical connector, which has a flange portion, and a plug-side ferrule that abuts against a ferrule of the receptacle-side optical connector, and an optical cable. is fixed, the example Bei a housing having a pressing section for pressing from the opposite side to the side of the flange portion of the receptacle side optical connector of the plug-side ferrule, the pressing portion, the receptacle and the plug-side ferrule It is in contact with the flange portion of the plug-side ferrule before butting against the ferrule of the optical connector, and does not retract the ferrule when the plug-side ferrule and the ferrule of the receptacle-side optical connector are abutted. Plug-side optical connector.

  Other features of the present invention will be apparent from the description in the specification and the drawings described below.

  According to the present invention, it is possible to reduce the size of the optical connector.

1A and 1B are explanatory diagrams of the optical connector system 1. FIG. FIG. 1A is a perspective view of the optical connector 100 on the receptacle side. FIG. 1B is a perspective view of the plug-side optical connector 10. FIG. 2 is a sectional view of the optical connector 100 on the receptacle side and the optical connector 10 on the plug side. FIG. 3 is an exploded view of the optical connector 100 on the receptacle side. 4A and 4B are explanatory diagrams of the optical cable 3 to which the plug-side optical connector 10 is attached. FIG. 4A is a sectional view of the optical cable 3. FIG. 4B is a perspective view of the optical cable 3. FIG. 5 is an exploded view of the plug-side optical connector 10. FIG. 6A is an explanatory diagram of the arrangement of the fitting O-ring 25. FIG. 6B is an explanatory diagram of the arrangement of the O-ring 27 for the cap. FIG. 7 is an exploded view of the inner housing 30 and the application mechanism 40. FIGS. 8A to 8F are explanatory views of a state when the inner housing 30 and the applying mechanism 40 are assembled. FIG. 9 is a top view of the fixing housing 31 at the time of bonding. FIG. 10 is a sectional view of the inner housing 30. FIG. 11 is an explanatory diagram of a central housing 32 according to another embodiment.

  At least the following matters will be apparent from the description in the specification and the drawings described below.

  A plug-side optical connector connected to the receptacle-side optical connector, the plug-side optical connector having a flange portion, which abuts against a ferrule of the receptacle-side optical connector, and is fixed to an optical cable, and the plug-side ferrule of the plug-side ferrule. A plug-side optical connector, comprising: a housing having a pressing portion for pressing the flange portion from the side opposite to the side of the receptacle-side optical connector. As a result, the size of the optical connector can be reduced.

  The housing has a fixing housing fixed to the optical cable, a first housing and a second housing attached to the receptacle side of the fixing housing on the side of the optical connector, and the pressing portion includes After the optical fiber is formed in one housing and the optical fiber to which the plug-side ferrule is attached in advance and the optical fiber exited from the optical cable are fused, the fixing housing is attached to the exit portion of the optical cable, It is preferable that the first housing and the second housing are attached to the fixing housing, and the pressing portion can be arranged on the opposite side of the flange portion. This eliminates the need to insert the housing into the optical fiber 5 before fusion, thus simplifying the operation of assembling the optical connector and miniaturizing the optical connector.

  An engaging hole is formed in the fixing housing, and an engaging claw protruding toward the fixing housing to engage with the engaging hole in each of the first housing and the second housing. Is desirably formed. Thereby, the displacement of the first housing and the second housing with respect to the fixing housing can be suppressed.

  The first housing is a semi-cylindrical member, and the second housing has a semi-cylindrical portion that covers a part of the semi-cylindrical first housing from outside, and has an outer peripheral surface of the first housing. Preferably, a guide portion is formed on an inner peripheral surface of the semi-cylindrical portion of the second housing along a connector attaching / detaching direction. This makes it difficult for the second housing to shift with respect to the first housing.

  It is preferable that the second housing has another holding portion for holding the flange portion of the plug-side ferrule from the side of the receptacle-side optical connector. As a result, the plug-side ferrule is pressed from both sides, and the position of the plug-side ferrule is fixed.

  A plug-side coupling portion that couples with the coupling portion of the receptacle-side optical connector, and a plug-side coupling portion that is arranged on the side of the receptacle-side optical connector of the housing, and that is connected to the receptacle-side optical connector when the housing and the receptacle-side optical connector are connected to each other. It is desirable to further include an elastic member that generates a repulsive force by being compressed and deformed with the connector. Accordingly, the work of assembling the optical connector is simplified, and the size of the optical connector can be reduced.

  An optical connector system including a receptacle-side optical connector and a plug-side optical connector, wherein the plug-side optical connector has a flange portion, and a plug-side ferrule that abuts against a ferrule of the receptacle-side optical connector, and an optical cable. And a housing having a holding portion for holding the flange portion of the plug-side ferrule from the side opposite to the side of the receptacle-side optical connector. As a result, the size of the optical connector can be reduced.

  An optical cable with a connector having a plug-side optical connector attached to an end, wherein the plug-side optical connector has a flange portion, and a plug-side ferrule that abuts against a ferrule of a receptacle-side optical connector, and is fixed to the optical cable. An optical cable with a connector, comprising: a housing having a pressing portion for pressing the flange portion of the plug-side ferrule from the side opposite to the side of the receptacle-side optical connector. Thus, the size of the optical connector attached to the end of the optical cable can be reduced.

=== embodiment ===
Before describing the structure of the optical connector (plug-side optical connector 10) of the present embodiment, first, an outline of the optical connector system 1 including the receptacle-side optical connector 100 will be described.

<Optical Connector System 1 and Optical Connector 100 on Receptacle Side>
Outline of Optical Connector System 1 FIGS. 1A and 1B are explanatory diagrams of the optical connector system 1. FIG. FIG. 1A is a perspective view of the optical connector 100 on the receptacle side. FIG. 1B is a perspective view of the plug-side optical connector 10. FIG. 2 is a sectional view of the optical connector 100 on the receptacle side and the optical connector 10 on the plug side. As shown in FIG. 2, the optical connector system 1 has a receptacle-side optical connector 100 and a plug-side optical connector 10. The receptacle-side optical connector 100 is sometimes called a socket-side optical connector. The optical connector system 1 of the present embodiment is assumed to be used mainly outdoors, and a cap 160 can be attached to and detached from the receptacle-side optical connector 100 (similarly, in the plug-side optical connector 10, the cap 160 can also be used). 60 is removable).

  In the following description, each direction is defined as shown in the figure. That is, the connector attaching / detaching direction is referred to as the “front-back direction”, the partner optical connector side is referred to as “front”, and the opposite side is referred to as “rear”. Note that the longitudinal direction of the optical fiber in the optical connector is the front-back direction. The long-axis direction of the cross section of the flat optical cable 3 on the plug side (the direction in which the two strength members 7 of the optical cable 3 are arranged: see FIG. 4A) is the left-right direction, and the right hand when viewed from the rear to the front. The side is “right” and the opposite side is “left”. A direction perpendicular to the front-rear direction and the left-right direction is referred to as a “vertical direction”.

  When the receptacle side optical connector 100 and the plug side optical connector 10 are connected, the end faces of the receptacle side ferrule 111 and the plug side ferrule 11 abut against each other. As a result, the end faces of the optical fibers physically abut each other, and the optical fibers are optically connected to each other.

.Receptacle side optical connector 100
FIG. 3 is an exploded view of the optical connector 100 on the receptacle side. The configuration of the receptacle-side optical connector 100 will be described with reference to FIGS.

The receptacle-side optical connector 100 has a connector main body 110, an outer housing 120, and an inner housing 130.
The connector main body 110 is a member having a ferrule 111 and a housing part 112. The ferrule 111 is a member that holds the end of the optical fiber. Here, a ferrule 111 made of cylindrical zirconia that holds the end of the single-core optical fiber is used. The housing part 112 is a plastic housing part for housing the ferrule 111. Here, an SC connector, which is a general-purpose connector, is used as the connector main body 110.

  The outer housing 120 is a member that houses the connector main body 110 via the inner housing 130. Here, the outer housing 120 houses the connector main body 110 via the inner housing 130, but may house the connector main body 110 without going through the inner housing 130. The outer housing 120 has a housing part 121, a coupling part 122, a front sleeve part 123, and a flange part.

  The housing section 121 is a section for housing the connector main body 110 and the internal housing 130. The accommodation section 121 is formed on the rear side of the outer housing 120.

  The coupling part 122 is a part that couples with the coupling part 22 (rotary part 21) on the plug side. Here, as the coupling section 122, a bayonet type BNC type coupling mechanism which is also employed in an electric coaxial connector is employed. For this reason, the coupling part 122 on the receptacle side is formed in a cylindrical shape, and the outer peripheral surface and the inner peripheral surface of the cylindrical coupling part 122 are formed with protrusions 122A.

  The front sleeve portion 123 is a sleeve portion for inserting the ferrule 11 on the plug side. The front sleeve portion 123 is formed inside the outer housing 120, and is formed inside the coupling portion 122.

  The flange portion 124 is a portion for fixing the external housing 120 (and the receptacle-side optical connector 100) to a board (see FIG. 2). A packing 125 for waterproofing is arranged between the flange portion 124 and the board.

  The inner housing 130 is a member that fixes the connector main body 110 to the outer housing 120. The inner housing 130 has a latch portion 131 and a fixing portion 132. The latch section 131 is a member for retaining the connector main body 110. A sleeve 131A is formed in the latch 131, and the ferrule 111 of the connector main body 110 is inserted into the sleeve 131A. That is, the sleeve portion 131A and the front sleeve portion 123 of the outer housing 120 function as a split sleeve for abutting the two ferrules 11 and 111. The fixing portion 132 is a member that fixes the latch portion 131 to the external housing 120. By fixing the fixing portion 132 to the external housing 120 with a screw, the latch portion 131 is prevented from slipping back.

  The receptacle side optical connector 100 further has a cap 160. The cap 160 is a member that covers the coupling part 122 on the receptacle side in order to protect the coupling part 122 of the optical connector 100 on the receptacle side. The cap 160 is connected to the receptacle-side optical connector 100 (outer housing 120) by a connecting member 161 (see FIG. 1A). A key groove 160A is formed on the inner peripheral surface of the cap 160, and the cap 160 is attached to the cylindrical coupling portion 122 while aligning the projection 122A of the coupling portion 122 with the key groove 160A. As shown in FIG. 1A, the key groove 160A is formed in an L shape. First, the cap 160 is inserted in parallel in the front-rear direction, and then the cap 160 is rotated to attach the cap 160. Conversely, when removing the cap 160, the cap 160 is pulled out after the cap 160 is rotated.

  A hexagonal hole 160B is formed on the front side of the cap 160 on the receptacle side (see FIG. 3). By inserting the hexagonal wrench 60A (see FIG. 1B) of the plug-side cap 60 into the hexagonal hole 160B and rotating the receptacle-side cap 160, the receptacle-side cap 160 can be attached and detached.

<Plug-side optical connector 10>
4A and 4B are explanatory diagrams of the optical cable 3 to which the plug-side optical connector 10 is attached. FIG. 4A is a sectional view of the optical cable 3. FIG. 4B is a perspective view of the optical cable 3.
The optical cable 3 has an optical fiber 5 and two strength members 7. The optical fiber 5 is housed in a tube cable 4 in which a tube 4A is filled with a gel 4B. Here, the tube cable 4 accommodates one optical fiber 5, but it is also possible to accommodate a plurality of optical fibers 5. The two strength members are arranged so as to sandwich the tube cable 4. Therefore, inside the optical cable 3, two tensile members 7 are arranged so as to sandwich the optical fiber 5. Since the two tensile strength members 7 are arranged so as to sandwich the tube cable 4, the optical cable 3 configured by covering these with the jacket has a flat cross section.
The optical cable 3 further has a waterproof member 8 and a lip cord 9. The waterproof member 8 is a member that absorbs water that has entered the optical cable 3, and is made of, for example, an absorbent yarn. The rip cord 9 is a cord-like member used when tearing the jacket of the optical cable 3. The waterproof member 8 and the lip cord 9 are disposed between the tube cable 4 and the strength member 7. However, the arrangement of the waterproof member 8 and the lip cord 9 is not limited to this. Further, the optical cable 3 does not have to include the waterproof member 8 and the lip cord 9.

  FIG. 5 is an exploded view of the plug-side optical connector 10. The configuration of the plug-side optical connector 10 will be described with reference to FIGS.

  The plug-side optical connector 10 is a connector attached to an end of the optical cable 3 and is a connector that can be attached to and detached from the receptacle-side optical connector 100. The optical cable 3 extends from the rear side of the plug-side optical connector 10. A boot 51 for protecting the optical cable 3 is attached to the rear side of the plug-side optical connector 10. The optical cable 3 to which the plug-side optical connector 10 is attached is an optical cable with an optical connector.

  The plug-side optical connector 10 also has a cap 60. The cap 60 is a member that covers the plug-side coupling section 22 in order to protect the coupling section 22 of the plug-side optical connector 10. The cap 60 is connected to the plug-side optical connector 10 (the rear housing 26 of the external housing 23) by a connecting member 61 (see FIG. 1B). A hexagon wrench part 60A is formed on the plug-side cap 60, and is inserted into the hexagonal hole 160B of the receptacle-side cap 160 and used for attaching and detaching the receptacle-side cap 160. The hexagon wrench part 60A is further formed with a through hole 60B. When the cap 60 attached to the plug-side optical connector 10 is difficult to remove, inserting a rod-shaped member (not shown) into the through hole 60B and rotating the cap 60 using the rod-shaped member facilitates the operation of removing the cap 60. Become.

  The plug-side optical connector 10 includes a ferrule 11, a rotating part 21, an outer housing 23, an inner housing 30, and an application mechanism 40.

・ Ferrule 11
The ferrule 11 is a member that holds the end of the optical fiber 5. Here, a cylindrical ferrule that holds the end of a single-core optical fiber is used. The ferrule 11 has a ferrule main body 11A and a flange 11B. The ferrule main body 11A is a cylindrical zirconia part that holds the end of the single-core optical fiber. The flange portion 11B is a portion (flange portion) that is arranged on the rear side of the ferrule main body 11A and protrudes outside the outer peripheral surface of the ferrule main body 11A.

・ Rotating part 21
The rotating part 21 is a member that is coupled to the coupling part 122 on the receptacle side, and is a cylindrical member (coupling part) that is rotatable outside the external housing 23 (the insertion part 24A). The rotating portion 21 and the insertion portion 24A of the external housing 23 form a bayonet-type BNC-type coupling mechanism (the coupling portion 22). The rotating portion 21 is formed with an entering portion 21A and a locking portion 21B. At the time of connection with the coupling part 122 on the receptacle side, after the projection part 122A on the receptacle side (the projection part 122A on the outer peripheral surface of the coupling part 122) is passed through the entry part 21A, the rotating part 21 on the plug side is rotated. The part 122A is locked (hooked) by the locking part 21B.

・ External housing 23
The outer housing 23 is a cylindrical member that houses the inner housing 30. The inside of the cylindrical outer housing 23 serves as a housing for housing the ferrule 11 and the inner housing 30. The outer housing 23 has a front housing 24 and a rear housing 26. A male screw (a thread is not shown in FIG. 5) is formed on the outer peripheral surface of the rear end of the front housing 24, and the male screw is connected to a female screw of the rear housing 26. The rear housing 26 functions like a nut fitted to the front housing 24.

  The front housing 24 is a tubular member that houses the front side of the internal housing 30. The front housing 24 has an insertion portion 24A and a support portion 24B.

The insertion part 24A is a part on the front side of the front housing 24, and is a part to be inserted inside the cylindrical coupling part 122 on the receptacle side. The insertion section 24 </ b> A forms a coupling section 22 of the plug-side optical connector 10 together with the rotating section 21.
The end face of the ferrule 11 (and the movable housing 41) is exposed from the opening on the front side of the insertion portion 24A. A key groove 241 is formed on the outer peripheral surface of the insertion portion 24A along the front-rear direction. At the time of connection with the coupling portion 122 on the receptacle side, the insertion portion 24A on the plug side is formed into a cylindrical shape on the receptacle side while the projection 122A on the receptacle side (the projection 122A on the inner peripheral surface of the coupling portion 122) is aligned with the key groove 241. Is inserted into the connecting portion 122. There is a gap between the outer peripheral surface of the insertion portion 24A and the inner peripheral surface of the rotating portion 21, and the cylindrical coupling portion 122 on the receptacle side enters this gap.

  The support portion 24B is a portion that rotatably supports the rotating portion 21 with respect to the front housing 24. The support portion 24B is formed on the outer peripheral surface at the center of the front housing 24.

  The rear end surface 24C of the front housing 24 is formed by a front edge of a flange 30A of the inner housing 30 (a front flange formed by a first flange 33E of the first housing 33 and a second flange 341C of the second housing 34). The contact portion is in contact with the portion 32A).

  The rear housing 26 is a tubular member that is attached to the rear side of the front housing 24 and houses the rear side of the internal housing 30. The rear housing 26 has a contact portion 26A and a mounting portion 26B.

  The contact portion 26A (see FIG. 2) is a portion protruding from the inner peripheral surface of the cylindrical rear housing 26, and is a rear edge of the flange 30A of the inner housing 30 (a rear flange 31E of the fixing housing 31). Is the part that comes into contact with Between the contact portion 26A and the rear end surface 24C of the front housing 24, a flange 30A of the internal housing 30 is sandwiched from front and rear. The boot 51 is attached to the attachment portion 26B. Note that a shrink sleeve 52 (see FIG. 2) is arranged between the mounting portion 26B and the boot 51. The inside of the shrink sleeve 52 is filled with a filler (not shown), and the shrink sleeve 52 closes a gap between the rear ends of the outer housing 23 and the inner housing 30 and the optical cable 3.

The outer housing 23 further has a fitting O-ring 25 and a cap O-ring 27.
FIG. 6A is an explanatory diagram of the arrangement of the fitting O-ring 25. The fitting O-ring 25 is a waterproof member that waterproofs the optical connection part when connecting the connector. The fitting O-ring 25 is arranged on the outer peripheral surface of the insertion portion 24A inside the rotating portion 21. When the insertion portion 24A is inserted inside the coupling portion 122 of the receptacle-side optical connector 100, the receptacle-side optical connector 100 contacts the inner peripheral surface of the coupling portion 122. Thereby, at the time of connector connection, the space between the insertion portion 24A, which is the plug-side coupling portion 22, and the receptacle-side coupling portion 122 is waterproofed, and the abutting portion between the receptacle-side ferrule 111 and the plug-side ferrule 11 ( Optical connection) can be waterproofed.

  A key groove 241 for the projection 122A inside the coupling portion 122 on the receptacle side is formed on the outer peripheral surface of the insertion portion 24A, but the O-ring 25 for fitting is located behind the key groove 241. Located on the side. Thereby, water intrusion from the key groove 241 can be prevented.

  By the way, even if the fitting O-ring 25 is arranged on the outer peripheral surface of the cylindrical coupling portion 122 of the receptacle-side optical connector 100, when the connector is connected, the plug-side coupling portion 22 (in this case, the rotating portion 21) is connected. The O-ring 25 for fitting can be arranged between the coupling portion 122 on the receptacle side. However, in this case, since the fitting O-ring 25 comes into contact with the rotating rotating part 21, there is a possibility that the waterproofness of the fitting O-ring 25 is reduced as compared with the present embodiment. Therefore, by disposing the fitting O-ring 25 on the outer peripheral surface of the insertion portion 24A as in the present embodiment, the connection between the plug-side insertion portion 24A and the receptacle-side cylindrical coupling portion 122 at the time of connector connection is made. It is desirable to dispose an O-ring 25 for fitting.

  FIG. 6B is an explanatory diagram of the arrangement of the O-ring 27 for the cap. The cap O-ring 27 is a waterproof member that waterproofs the optical connection portion when the optical connector 10 is capped. The cap O-ring 27 is arranged on the outer peripheral surface of the rear housing 26, and comes into contact with the inner peripheral surface of the cap 60 when the cap 60 is put on the plug-side optical connector 10. Accordingly, when the optical connector 10 is capped, the inside of the cap 60 is waterproofed, and the ferrule 11 on the plug side can be waterproofed.

  In the present embodiment, the fitting O-ring 25 and the cap O-ring 27 are separately provided. If the fitting O-ring 25 is also used as the cap O-ring 27, the cap must be inserted into the gap between the rotating part 21 and the insertion part 24A. Therefore, the rotating part 21 must be protected by the cap. Can not be done. In addition, since the O-ring 27 for a cap is arrange | positioned behind the rotating part 21, it is difficult to also use the O-ring 27 for a cap as the O-ring 25 for fitting. For this reason, in the present embodiment, a waterproof member (O-ring 25 for fitting) that waterproofs the optical connection portion when the connector is connected, and a waterproof member (O-ring 27 for cap) that waterproofs the optical connection portion when the optical connector 10 is capped. Are provided separately.

  Further, as shown in FIG. 2, the outer housing 23 has a housing O-ring 29. The housing O-ring 29 is arranged at a connection portion between the front housing 24 and the rear housing 26. The housing O-ring 29 is a waterproof member that waterproofs the inside of the outer housing 23.

・ Inner housing 30
FIG. 7 is an exploded view of the inner housing 30 and the application mechanism 40. FIGS. 8A to 8F are explanatory views of a state when the inner housing 30 and the applying mechanism 40 are assembled. The assembling work of the optical connector 10 may be performed in an assembling factory, or may be performed at each site outside the factory.

  The inner housing 30 is a member (housing) that protects the optical fiber (the bare fiber with the coating removed) on the rear side of the ferrule 11 inside the outer housing 23. This is a member for protecting the optical fiber 5 (bare fiber with the coating removed) on the rear side of the ferrule 11. As shown in FIG. 8A, when the pigtail optical fiber to which the ferrule 11 is attached in advance and the optical fiber 5 led out from the optical cable 3 are fused, the reinforcing tube 35 is arranged on the optical fiber 5 near the fusion point. Sometimes. The inner housing 30 can accommodate the reinforcing tube 35. When the optical fiber 5 is not fused (when the optical fiber 5 led out from the optical cable 3 is directly connected to the ferrule 11), the reinforcing tube 35 becomes unnecessary, but in such a case, the reinforcing tube 35 can be accommodated. A simple internal housing 30 can be used.

  The inner housing 30 has a fixing housing 31 and a central housing 32.

  The fixing housing 31 is a member (housing) that covers at least a part of the optical fiber 5 extending from the ferrule 11 and is fixed to the optical cable 3 (specifically, the tensile strength member 7). The fixing housing 31 is also a member that fixes the central housing 32 (the first housing 33 and the second housing 34) to the optical cable 3. However, the fixing housing 31 and the central housing 32 may be integrally formed, and the integrated fixing housing 31 may be fixed to the optical cable 3.

  The fixing housing 31 is a cylindrical member through which the optical fiber 5 can be inserted, and has an insertion hole 31A and an adhesive filling window 31B.

  The insertion hole 31A is a hole through which the optical fiber 5 output from the optical cable 3 is inserted. The optical fiber 5 of the optical cable 3 and the two strength members 7 can be inserted into the insertion hole 31A. The strength member 7 may or may not penetrate the insertion hole 31A. Here, the front end of the tensile strength member 7 is arranged inside the insertion hole 31A without penetrating the insertion hole 31A.

  The size of the insertion hole 31A is such that the optical fiber 5 and the two strength members 7 can be inserted, but the entire optical cable 3 cannot be inserted. If the insertion hole 31A becomes large enough to insert the entire optical cable 3, the fixing housing 31 becomes large. On the other hand, in the present embodiment, the insertion hole 31A can be made small, so that the fixing housing 31 can be made small.

  By the way, if the optical cable 3 cannot be inserted into the insertion hole 31A of the fixing housing 31, there is a restriction that the fixing housing 31 cannot be arranged before the outlet of the optical cable 3 at the time of assembling the optical connector 10. However, in the present embodiment, the insertion hole 31A is configured to be large enough to pass through the ferrule 11. For this reason, since the fixing housing 31 can be inserted and attached from the front side of the ferrule 11 after the fusion of the optical fiber 5 (see FIGS. 8A and 8B described later), the insertion hole 31A of the fixing housing 31 is The restriction at the time of assembling due to the inability to insert is allowed.

  The adhesive filling window 31B is a window (opening) that allows the insertion hole 31A to communicate with the outside. By filling the insertion hole 31A with the adhesive from the adhesive filling window 31B, the strength member 7 of the optical cable 3 and the fixing housing 31 are bonded and fixed. Since the metal members can be fixed with an adhesive instead of being caulked and joined, the mounting work of the housing is simplified. Further, since the adhesive is filled from the adhesive filling window 31B, the operation of applying the adhesive between the strength member 7 and the inner wall of the fixing housing 31 is facilitated. Further, since the application state of the adhesive inside the fixing housing 31 can be checked from the adhesive filling window 31B, the operation of applying the adhesive becomes easy.

FIG. 9 is a top view of the fixing housing 31 at the time of bonding.
The adhesive filling window 31B is formed in the fixing housing 31 so as to open in the up-down direction. That is, the adhesive-filled window 31B is opened in the direction (vertical direction) perpendicular to the direction in which the two strength members 7 are arranged (left-right direction) and the longitudinal direction (front-back direction) of the optical cable 3. Is formed. This facilitates the operation of applying the adhesive to the two strength members 7.

  The adhesive filling window 31B has a shape extending in the front-rear direction (the longitudinal direction of the optical cable 3). Thereby, the adhesive can be applied along the front-rear direction of the strength member 7 in the fixing housing 31, and the area where the adhesive is applied between the strength member 7 and the inner wall of the fixing housing 31 becomes longer. Thus, the adhesion and fixation of both are strengthened.

  The width of the adhesive filling window 31B in the left-right direction is wider than the width of the optical fiber 5 (the diameter of the optical fiber 5 including the coating). Thereby, since the two strength members 7 sandwiching the optical fiber 5 can be visually recognized from the adhesive filling window 31B, the operation of applying the adhesive to the strength members 7 becomes easy.

  Projections 31C are formed on the upper and lower portions of the rear end of the fixing housing 31 so as to project rearward. The upper and lower protruding portions 31C grip the jacket of the optical cable 3 from above and below. That is, the upper and lower protruding portions 31C grip the flat optical cable 3 from the short diameter direction. Thereby, the displacement (particularly the displacement in the rotation direction) of the fixing housing 31 with respect to the optical cable 3 before bonding can be suppressed, and the work of filling the adhesive from the adhesive filling window 31B becomes easy.

  At the top and bottom of the front end of the fixing housing 31, engagement holes 31D are formed, respectively. Engagement claws (first engagement claw 33C, second engagement claw 341B) formed at the rear end of central housing 32 (first housing 33 and second housing 34) are engaged with this engagement hole 31D. Combine. Thereby, the displacement of the center housing 32 (the first housing 33 and the second housing 34) with respect to the fixing housing 31 can be suppressed.

  On the front side of the fixing housing 31, a rear flange portion 31E is formed. The rear flange 31E, together with the front flange 32A of the central housing 32, forms a flange 30A of the inner housing 30. The rear flange 31 </ b> E comes into contact with a contact portion 26 </ b> A of the rear housing 26 that becomes the outer housing 23.

  After fixing the optical fiber 5 and arranging the reinforcing tube 35 at the fusion point as shown in FIG. 8A, the fixing housing 31 is inserted from the front side of the ferrule 11 as shown in FIG. Attached to the outlet. Since the fixing housing 31 can be inserted and attached from the front side of the ferrule 11 after the fusion of the optical fiber 5, the optical fiber 5 coming out of the optical cable 3 can be set in the fusion splicer even if the optical fiber 5 is short. The size of the optical connector 10 can be reduced as compared with the case where the fixing housing 31 must be arranged behind the ferrule 11 in advance.

  Before attaching the fixing housing 31 to the optical cable 3, the members (the rear housing 26, the shrinkable sleeve 52, and the boot 51) arranged on the rear side of the fixing housing 31 are positioned on the rear side of the outlet of the optical cable 3. Will be inserted. The operation of inserting these members into the optical cable 3 may be performed before or after the optical fiber 5 is fused.

FIG. 10 is a sectional view of the inner housing 30.
The central housing 32 is a member that protects the optical fiber 5 (the bare fiber from which the coating is removed) on the rear side of the ferrule 11 and is a member (housing) that can accommodate the reinforcing tube 35. The center housing 32 is located at the center of the inner housing 30 and is located on the front side of the fixing housing 31.

  On the rear side of the central housing 32, a front flange portion 32A is formed. The front flange 32A, together with the rear flange 31E of the fixing housing 31, forms a flange 30A of the inner housing 30. The front flange 32 </ b> A is in contact with a rear end surface 24 </ b> C of the front housing 24 that becomes the outer housing 23. The flange 30A (the front flange 32A and the rear flange 31E) of the inner housing 30 is sandwiched between the rear end surface 24C of the front housing 24 and the contact portion 26A of the rear housing 26 from front and rear. Thereby, the inner housing 30 (the fixing housing 31 and the central housing 32) is fixed to the outer housing 23.

  The central housing 32 has a first housing 33 and a second housing 34. Although the central housing 32 may be formed as a cylindrical integral structure, in the present embodiment, the central housing 32 is divided into a first housing 33 and a second housing 34, and each has a substantially half structure. As a result, as shown in FIG. 10, the flange portion 11B of the ferrule 11 can be pressed from both front and rear sides, and the position of the ferrule 11 in the front-rear direction is fixed.

The first housing 33 is a semi-cylindrical member that covers a lower portion of the reinforcing tube 35. The first housing 33 has a first housing portion 33A, a trailing edge pressing portion 33B, a first engagement claw 33C, a guide portion 33D, and a first flange portion 33E.
33 A of 1st accommodation parts are parts which accommodate the lower part of the reinforcement tube 35. FIG. 33 A of 1st accommodation parts are formed in concave shape along the front-back direction.

  The trailing edge pressing portion 33B is a portion that presses the trailing edge of the flange portion 11B of the ferrule 11 from the rear side (the side opposite to the side of the receptacle-side optical connector 100). The trailing edge pressing portion 33B is a portion formed in a U-shape. As shown in FIGS. 8C and 10, the U-shaped trailing edge pressing portion 33 </ b> B is inserted and arranged between the flange portion 11 </ b> B of the ferrule 11 and the reinforcing tube 35. The front surface of the trailing edge pressing portion 33B comes into contact with the trailing edge of the flange portion 11B of the ferrule 11, so that the ferrule 11 can be prevented from moving rearward. Accordingly, when the ferrule 11 abuts on the ferrule 111 of the receptacle-side optical connector 100 (when the connector is connected), it is possible to suppress the ferrule 11 from moving rearward. Further, since a space for allowing the ferrule 11 to be retracted is not required, the size of the optical connector 10 can be reduced.

  The first engagement claw 33C is a portion that protrudes rearward (toward the fixing housing 31) from the rear end of the first housing 33, and is a portion that engages with the engagement hole 31D of the fixing housing 31. By engaging the first engagement claws 33C with the engagement holes 31D of the fixing housing 31, displacement of the first housing 33 with respect to the fixing housing 31 can be suppressed, and dropping from the fixing housing 31 can be suppressed.

  The guide portion 33D is a portion that guides the second housing 34 in the front-rear direction. The guide portion 33D is formed on the outer peripheral surface of the semi-cylindrical first housing 33 as a ridge extending in the front-rear direction. Note that a guide groove (not shown) is formed on the inner peripheral surface of the second housing 34 along the front-rear direction so as to fit with the guide portion 33D of the first housing 33.

  The first flange portion 33E is a portion that constitutes the front flange portion 32A of the central housing 32. The first flange 33 </ b> E is a portion that protrudes outward from the outer peripheral surface of the semi-cylindrical first housing 33, and is formed on the rear side of the first housing 33.

  After the first housing 33 attaches the fixing housing 31 to the optical cable 3 (see FIG. 8C), as shown in FIGS. 8C and 10, the first engaging claws 33C are inserted into the engaging holes 31D of the fixing housing 31. While being engaged, the U-shaped trailing edge pressing portion 33B is inserted between the flange portion 11B of the ferrule 11 and the reinforcing tube 35, and is disposed so as to cover the lower portion of the reinforcing tube 35.

  The second housing 34 is a member that covers the upper part of the reinforcing tube 35. The second housing 34 has a semi-cylindrical portion 341 and a cylindrical portion 342.

  The semi-cylindrical portion 341 is a semi-cylindrical portion on the rear side of the cylindrical portion 342, and has a second accommodation portion 341A (see FIG. 10) for accommodating an upper portion of the reinforcing tube 35. The second storage portion 341A is formed in a concave shape along the front-rear direction. At the rear end of the semi-cylindrical portion 341, a second engaging claw 341B protruding rearward (toward the fixing housing 31) is formed. The second engagement claw 341B is a portion that engages with the engagement hole 31D of the fixing housing 31. The semi-cylindrical portion 341 covers a part of the semi-cylindrical first housing 33 from outside, and has an inner peripheral surface covering the first housing 33 in the front-rear direction so as to fit with the guide portion 33D of the first housing 33. Are formed along the guide groove (not shown). A second flange portion 341C is formed on the rear side of the semi-cylindrical portion 341. The second flange portion 341C is a portion that constitutes the front flange portion 32A of the central housing 32 together with the first flange portion 33E, and is a portion that protrudes outward from the outer peripheral surface of the semi-cylindrical portion 341.

  The cylindrical portion 342 is a portion on the front side of the semi-cylindrical portion 341, and is a cylindrical portion that covers the flange portion 11 </ b> B of the ferrule 11. At the front edge of the cylindrical portion 342, a pressing portion 342A is formed. As shown in FIG. 10, the rear surface (inner surface) of the pressing portion 342 </ b> A comes into contact with the front edge of the flange portion 11 </ b> B of the ferrule 11, and it is possible to suppress the ferrule 11 from moving forward. That is, the flange portion 11B of the ferrule 11 is pressed from the front and rear sides by the rear edge pressing portion 33B of the first housing 33 and the pressing portion 342A of the second housing 34. Thereby, the position of the ferrule 11 in the front-back direction is fixed. A hole is formed in the center of the pressing portion 342A, and the ferrule main body 11A protrudes from this hole. The front surface of the pressing portion 342A is in contact with the rear end of the spring 42 described later.

After the first housing 33 is attached (see FIG. 8C), the second housing 34 is attached to the first housing 33 while aligning a guide groove (not shown) inside the second housing 34 with the guide portion 33D of the first housing 33. 8D. Then, it is attached to the position shown in FIG. At this time, since the guide portion 33D of the first housing 33 enters the guide groove of the second housing 34, the movement of the second housing 34 in the up-down direction or the left-right direction with respect to the first housing 33 is restricted. The second housing 34 is less likely to be displaced with respect to the first housing 33, and the work of attaching the second housing 34 is facilitated.
When the second housing 34 is slid rearward, the second engagement claws 341B engage with the engagement holes 31D of the fixing housing 31, as shown in FIG. Thereby, the displacement of the second housing 34 with respect to the fixing housing 31 can be suppressed.
When the second housing 34 is slid rearward, as shown in FIG. 10, the ferrule main body 11A protrudes from the hole at the center of the holding portion 342A of the cylindrical portion 342, and the ferrule main body 11A is inserted inside the cylindrical portion 342. Eleven flange portions 11B are accommodated. At this time, the pressing portion 342A of the second housing 34 sandwiches the flange portion 11B of the ferrule 11 between the pressing portion 342A and the rear edge pressing portion 33B of the first housing 33. Thereby, the flange portion 11B of the ferrule 11 is pressed from both front and rear sides, and the position of the ferrule 11 in the front and rear direction is fixed.

  As shown in FIG. 8D, when the second housing 34 is attached, the central housing 32 is formed on the front side of the fixing housing 31. When the second housing 34 is attached, the front flange 32A is constituted by the second flange 341C and the first flange 33E of the first housing 33, and the front flange 32A and the rear side of the fixing housing 31 are formed. The flange portion 31E forms a flange portion 30A of the inner housing 30 (a flange portion 30A to be sandwiched by the outer housing 23).

・ Granting mechanism 40
The applying mechanism 40 is a mechanism that applies a rearward force to the plug-side optical connector 10 when the connector is connected. The application mechanism 40 has a movable housing 41 and a spring 42.

  The movable housing 41 is a member (housing) movable in the front-rear direction while housing the ferrule main body 11A. The movable housing 41 functions as a housing that covers the ferrule main body 11A, thereby protecting the ferrule main body 11A. The movable housing 41 has a cylindrical shape. The ferrule main body 11A is inserted into the center of the movable housing 41, and a spring 42 is housed in the center cavity. The movable housing 41 is arranged on the front side of the central housing 32, and the spring 42 is arranged between the movable housing 41 and the central housing 32.

The spring 42 (see FIG. 7) is an elastic member that applies a rearward force to the plug-side optical connector 10 when the connector is connected. Here, a coil spring is used as the spring 42, but a spring of another shape may be used, or an elastic member of another material such as rubber may be used. The ferrule main body 11A is inserted into the center cavity of the spring 42. The spring 42 is arranged in a compressed state between the movable housing 41 and the inner housing 30 (the pressing portion 342A of the second housing 34), and generates a repulsive force therebetween. The front end of the spring 42 is in contact with the inner wall surface of the movable housing 41, and the rear end of the spring 42 is in contact with the front surface of the pressing portion 342A of the second housing 34.
After the second housing 34 is attached (see FIG. 8D), the spring 42 is attached to the ferrule main body 11A projecting forward from the second housing 34, as shown in FIG. 8E.

  The front side of the movable housing 41 is open, and the end face of the ferrule 11 is exposed from this opening (see FIGS. 1B and 2). There is a gap between the movable housing 41 and the ferrule 11. When the ferrule 11 on the plug side is inserted into the front sleeve portion 123 on the receptacle side (see FIG. 2) at the time of connecting the connector, the front sleeve portion 123 on the receptacle side enters the gap between the movable housing 41 and the ferrule 11. Become.

  The movable housing 41 is exposed from an opening on the front side of the insertion portion 24A, and is arranged so as to slightly protrude forward from the front edge of the insertion portion 24A (see FIG. 2). Since the movable housing 41 protrudes forward from the insertion portion 24A, when the connector is connected, the movable housing 41 comes into contact with the optical connector 100 on the receptacle side (specifically, the base of the front sleeve portion 123 of the external housing 120) and the receptacle side. Receive power from. The repulsive force of the spring 42 thus compressed acts between the receptacle-side optical connector 100 and the plug-side optical connector 10 via the central housing 32. As a result, the receptacle-side coupling portion 122 (projection 122A). (Trapping) between the plug and the coupling portion 22 (the locking portion 21B of the rotating portion 21) on the plug side is strengthened, and is hardly released.

  A flange 41A is formed on the movable housing 41. The foremost position of the movable housing 41 with respect to the front housing 24 is defined by the contact of the flange 41A with a protrusion (not shown) formed on the inner peripheral surface of the front housing 24. Thus, the movable housing 41 to which the force is applied to the front side from the spring 42 is prevented from slipping forward, and the movable housing 41 is allowed to move rearward when the connector is connected.

  After attaching the spring 42 to the ferrule main body 11A (see FIG. 8E), the movable housing 41 is attached from the front side to accommodate the spring 42 as shown in FIG. 8F. Thereafter, the front housing 24 to which the rotating portion 21 is attached is inserted from the front side of the inner housing 30, and the front housing 24 and the rear housing 26 previously inserted into the optical cable 3 are connected by fitting (screw fastening). . At this time, the flange 30A of the internal housing 30 is sandwiched between the contact portion 26A of the rear housing 26 and the rear end surface 24C of the front housing 24 from the front and rear. When the front housing 24 is connected to the rear housing 26, the flange 41 </ b> A of the movable housing 41 comes into contact with a protrusion (not shown) formed on the inner peripheral surface of the front housing 24, and the spring 42 is connected to the movable housing 41. It is arrange | positioned in the state compressed between the internal housing 30 (press part 342A of the 2nd housing 34).

  Incidentally, the repulsive force of the spring 42 has a function of making it difficult for the coupling portion 122 (projection portion 122A) on the receptacle side and the coupling portion 22 (locking portion 21B of the rotating portion 21) of the plug side to be disengaged (locked). . Since the spring 42 having such a function is disposed on the front side of the housing portion 11B of the ferrule 11, the spring 42 can be inserted and attached from the front side of the ferrule 11 after the optical fiber 5 is fused. In the case of a configuration in which a spring is disposed behind the housing portion 11B of the ferrule 11, the spring must be disposed in advance behind the ferrule 11 before fusion, so that compared to such a case. Even if the optical fiber 5 coming out of the optical cable 3 is short, it can be set in the fusion splicer, so that the optical connector 10 can be downsized.

  In the case of a configuration in which a spring is disposed behind the housing portion 11B of the ferrule 11, it is necessary to provide a space so that the ferrule 11 can be retracted (retracted) to the rear when the connector is connected. On the other hand, in the present embodiment, the spring 42 is arranged on the front side of the housing portion 11B of the ferrule 11, the ferrule 11 does not move in the front-rear direction, and a space for allowing the ferrule 11 to retreat becomes unnecessary. Therefore, the size of the optical connector 10 can be reduced.

<Summary>
The above-described plug-side optical connector 10 includes a ferrule 11 (plug-side ferrule) having a flange portion 11B, and an internal housing 30 (a fixing housing 31 and a central housing 32) fixed to the optical cable. As shown in FIGS. 7 and 10, the inner housing 30 has a trailing edge pressing portion 33 </ b> B (pressing portion) that presses the flange portion 11 </ b> B of the ferrule 11 from the rear side (the side opposite to the optical connector 100 on the receptacle side). doing. Accordingly, when the ferrule 11 abuts on the ferrule 111 of the receptacle-side optical connector 100 (when the connector is connected), it is possible to suppress the ferrule 11 from moving rearward. Compared to the case where the ferrule is configured to be retractable, in the present embodiment, a space for allowing the ferrule 11 to be retractable is not required, so that the optical connector 10 can be reduced in size.

  As shown in FIG. 7, the inner housing 30 includes a fixing housing 31 and a first housing 33 and a second housing 34 attached to the front side of the fixing housing 31 (the side of the receptacle-side optical connector 100). The rear edge pressing portion 33 </ b> B is formed in the first housing 33. Then, as shown in FIGS. 8A to 8D, after fusion of the optical fiber 5, the fixing housing 31 is attached to the leading portion of the optical cable 3, and the first housing 33 and the second housing 34 are attached to the fixing housing 31. Thus, the trailing edge pressing portion 33B can be arranged behind the flange portion 11B of the ferrule 11. For this reason, since it is not necessary to insert the internal housing 30 into the optical fiber 5 before fusion, the assembling work of the optical connector is simplified, and even if the optical fiber 5 coming out of the optical cable 3 is short, the fusion splicer can be used. Since the optical connector 10 can be set, the size of the optical connector 10 can be reduced.

  As shown in FIG. 7, the fixing housing 31 has an engaging hole 31D formed therein, the first housing 33 has a first engaging claw 33C (engaging claw), and the second housing 33 has a second engaging claw 33C. The housing 34 has a second engagement claw 341B (engagement claw). As shown in FIG. 10, the first engagement claw 33 </ b> C and the second engagement claw 341 </ b> B engage with the engagement holes 31 </ b> D of the fixing housing 31, so that the first housing 33 and the second housing with respect to the fixing housing 31. 34 can be suppressed.

  As shown in FIG. 7, the first housing 33 is a semi-cylindrical member, and has a guide portion 33D formed on the outer peripheral surface thereof in the front-rear direction (connecting / removing direction). Further, the second housing 34 has a semi-cylindrical portion 341 that covers a part of the semi-cylindrical first housing 33 from outside, and the inner peripheral surface of the semi-cylindrical portion 341 has a guide groove ( A guide portion: not shown in FIG. 7) is formed. As shown in FIG. 8D, when the second housing 34 is attached to the first housing 33, the movement of the second housing 34 with respect to the first housing 33 in the up-down direction or the left-right direction is restricted by the guide portion. Are less likely to be displaced with respect to the first housing 33, and the work of attaching the second housing 34 is facilitated.

  As shown in FIG. 10, the second housing 34 has a pressing portion 342A (another pressing portion) for pressing the flange portion 11B of the ferrule 11 from the front side (the side of the receptacle-side optical connector 100). Thereby, the flange portion 11B of the ferrule 11 is pressed from both front and rear sides by the rear edge pressing portion 33B of the first housing 33 and the pressing portion 342A of the second housing 34, so that the position of the ferrule 11 in the front-rear direction is fixed. it can.

  The above-described plug-side optical connector 10 includes a plug-side coupling portion 22 (the rotating portion 21 and the insertion portion 24A) coupled to the coupling portion 122 of the receptacle-side optical connector 100, and a spring 42 (elastic member). . Since the spring 42 is disposed on the front side of the flange portion 11B of the ferrule 11, the spring 42 does not have to be inserted into the optical fiber 5 before the ferrule 11 is attached at the time of assembling the optical connector 10. As a result, the work of assembling the optical connector is simplified and the optical connector 10 can be set in the fusion splicer even if the optical fiber 5 coming out of the optical cable 3 is short, so that the optical connector 10 can be downsized.

  In this embodiment, an adhesive filling window 31B is formed in the fixing housing 31. However, it is possible to fill the inside of the fixing housing 31 with the adhesive through the insertion hole 31A without providing the adhesive filling window 31B in the fixing housing 31, and bond the fixing housing 31 and the tensile strength member 7 of the optical cable 3 to each other. . Even in such a case, if the inner housing 30 has the trailing edge pressing portion 33B (pressing portion), the size of the optical connector 10 can be reduced as compared with the case where the ferrule is configured to be retractable.

=== Another embodiment ===
The central housing 32 composed of the first housing 33 and the second housing 34 is not limited to the shape of the above-described embodiment.
FIG. 11 is an explanatory diagram of a central housing 32 according to another embodiment. The configuration other than the central housing 32 (for example, the rotating unit 21 and the outer housing 23) is the same as in the above-described embodiment.
The first housing 33 and the second housing 34 of the present embodiment are each configured in a semi-cylindrical half-structure, and the upper surface of the first housing 33 and the lower surface of the second housing 34 are aligned with each other from the top and the The housing 32 is configured (in contrast, in the above-described embodiment, the inner peripheral surface of the semi-cylindrical portion 341 of the second housing is configured to cover a part of the semi-cylindrical first housing 33 from the outside. There). Therefore, in the present embodiment, the guide portion 33D (see FIG. 7) is not formed in the first housing 33, and the guide groove is not formed in the inner peripheral surface of the second housing 34. In the present embodiment, the front flange 32A of the central housing 32 can be reduced in size in the radial direction.

Also in the present embodiment, the trailing edge pressing portion 33 </ b> B (pressing portion) is formed in the first housing 33. A trailing edge pressing portion 33B (pressing portion) is formed in the first housing 33 constituting the inner housing 30. Therefore, also in the present embodiment, the size of the optical connector 10 can be reduced as compared with the case where the ferrule is configured to be retractable.
Also in the present embodiment, after fusion of the optical fiber 5, the fixing housing 31 can be attached to the leading portion of the optical cable 3, and the first housing 33 and the second housing 34 can be attached to the fixing housing 31. For this reason, since it is not necessary to insert the internal housing 30 into the optical fiber 5 before fusion, the assembling work of the optical connector is simplified, and even if the optical fiber 5 coming out of the optical cable 3 is short, the fusion splicer can be used. Since the optical connector 10 can be set, the size of the optical connector 10 can be reduced.

=== Others ===
The above embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

<About ferrules>
In the above-described embodiment, an SC connector is used as the receptacle-side optical connector 100, and the ferrules 11 and 111 on the receptacle side and the plug side use cylindrical ferrules that hold the ends of single-core optical fibers. . However, instead of the SC connector, an ST connector, an LC connector, an MU connector, or the like may be used, and the connector may not be a general-purpose connector. Instead of a single-core cylindrical ferrule, a multi-core ferrule such as an MT ferrule may be used.

1 optical connector system, 3 optical cable (optical cable with connector),
5 optical fiber, 7 strength member,
10 Optical connector on plug side,
11 ferrule, 11A ferrule body, 11B flange,
21 rotating part, 21A entry part, 21B locking part,
22 coupling part (rotating part 21 and insertion part 24A),
23 outer housing, 24 front housing,
24A insertion part, 24B support part, 24C rear end face,
241 keyway, 25 O-ring for fitting,
26 rear housing, 26A contact part, 26B mounting part,
27 O-ring for cap,
29 O-ring for housing,
30 internal housing (housing), 30A flange,
31 Housing for fixing, 31A insertion hole,
31B adhesive-filled window, 31C protrusion,
31D engagement hole, 31E rear flange,
32 central housing, 32A front flange,
33 first housing, 33A first storage section,
33B trailing edge pressing portion (pressing portion), 33C first engaging claw,
33D guide, 33E first flange,
34 second housing, 341 semi-cylindrical part,
341A second storage portion, 341B second engagement claw, 341C second flange,
342 cylindrical part, 342A holding part (another holding part),
35 reinforcing tube, 40 applying mechanism,
41 movable housing, 41A flange,
42 spring, 51 boot, 52 shrink sleeve,
60 plug side cap, 60A hexagon wrench, 60B through hole,
61 connecting member, 100 receptacle side optical connector,
110 connector body, 111 ferrule, 112 housing part,
120 outer housing, 121 housing,
122 joint, 122A protrusion,
123 front sleeve part, 124 flange part, 125 packing,
130 internal housing, 131 latch part,
131A sleeve part, 132 fixing part,
160 Receptacle side cap, 160A keyway,
160B hexagonal hole, 161 connecting member

Claims (8)

A plug-side optical connector connected to the receptacle-side optical connector,
A plug-side ferrule having a flange portion and abutting against a ferrule of the receptacle-side optical connector;
Are fixed with respect to the optical cable, e Bei a housing having a pressing section for pressing from the opposite side to the side of the receptacle side optical connector the flange portion of the plug-side ferrule,
The holding portion,
Before the abutting of the plug-side ferrule and the ferrule of the receptacle-side optical connector, it is in contact with the flange portion of the plug-side ferrule,
The plug-side optical connector, wherein the ferrule is not retracted when the ferrule of the receptacle-side optical connector comes into contact with the plug-side ferrule. The plug-side optical connector according to claim 1, wherein
The housing includes a fixing housing fixed to the optical cable, and a first housing and a second housing attached to the fixing housing on the side of the receptacle-side optical connector,
The holding portion is formed in the first housing,
After the optical fiber to which the plug-side ferrule is attached in advance and the optical fiber exited from the optical cable are fused, the fixing housing is attached to the exit portion of the optical cable, and the first housing is attached to the fixing housing. The plug-side optical connector, wherein a housing and the second housing are attached, and the pressing portion can be arranged on the opposite side of the flange portion. It is a plug side optical connector of Claim 2, Comprising:
An engagement hole is formed in the fixing housing,
A plug-side optical connector, wherein each of the first housing and the second housing is formed with an engagement claw projecting toward the fixing housing so as to engage with the engagement hole. It is a plug side optical connector of Claim 2 or 3, Comprising:
The first housing is a semi-cylindrical member,
The second housing has a semi-cylindrical portion that covers a part of the semi-cylindrical first housing from outside,
A plug-side optical connector, wherein guide portions are formed on an outer peripheral surface of the first housing and an inner peripheral surface of the semi-cylindrical portion of the second housing along a connector attaching / detaching direction. It is a plug side optical connector in any one of Claims 2-4, Comprising:
The said 2nd housing has another holding part which presses the said flange part of the said plug side ferrule from the said receptacle side optical connector side, The plug side optical connector characterized by the above-mentioned. The plug-side optical connector according to claim 1, wherein:
A plug-side coupling portion coupled to the receptacle-side optical connector coupling portion,
An elastic member that is disposed on the side of the receptacle-side optical connector of the housing and that is compressed and deformed between the housing and the receptacle-side optical connector when connected to the receptacle-side optical connector to generate a repulsive force; A plug-side optical connector, characterized in that: An optical connector system including a receptacle-side optical connector and a plug-side optical connector,
The plug-side optical connector,
A plug-side ferrule having a flange portion and abutting against a ferrule of the receptacle-side optical connector;
Are fixed with respect to the optical cable, e Bei a housing having a pressing section for pressing from the opposite side to the side of the receptacle side optical connector the flange portion of the plug-side ferrule,
The holding portion,
Before the abutting of the plug-side ferrule and the ferrule of the receptacle-side optical connector, it is in contact with the flange portion of the plug-side ferrule,
An optical connector system , wherein the ferrule is not retracted when the plug-side ferrule and the ferrule of the receptacle-side optical connector abut . An optical cable with a connector having a plug-side optical connector attached to an end thereof,
The plug-side optical connector,
A plug-side ferrule having a flange portion and abutting against a ferrule of the receptacle-side optical connector;
Are fixed with respect to the optical cable, e Bei a housing having a pressing section for pressing from the opposite side to the side of the receptacle side optical connector the flange portion of the plug-side ferrule,
The holding portion,
Before the abutting of the plug-side ferrule and the ferrule of the receptacle-side optical connector, it is in contact with the flange portion of the plug-side ferrule,
An optical cable with a connector , wherein the ferrule is not retracted when the plug-side ferrule abuts against the ferrule of the receptacle-side optical connector .

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