JP6576051B2 - Optical connector, optical cable with connector, and optical connector mounting method - Google Patents

Optical connector, optical cable with connector, and optical connector mounting method Download PDF

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JP6576051B2
JP6576051B2 JP2015044428A JP2015044428A JP6576051B2 JP 6576051 B2 JP6576051 B2 JP 6576051B2 JP 2015044428 A JP2015044428 A JP 2015044428A JP 2015044428 A JP2015044428 A JP 2015044428A JP 6576051 B2 JP6576051 B2 JP 6576051B2
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Prior art keywords
housing
optical
ferrule
portion
connector
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JP2016164598A (en
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茂雄 高橋
茂雄 高橋
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株式会社フジクラ
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Priority to JP2015044428A priority Critical patent/JP6576051B2/en
Priority claimed from PCT/JP2015/083574 external-priority patent/WO2016143202A1/en
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Description

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

An optical connector system including a receptacle-side optical connector and a plug-side optical connector is known. 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 describe an optical connector system including a receptacle-side optical connector and a plug-side optical connector. These documents also describe a housing that covers an optical fiber (bare fiber) extending from the ferrule.

US Patent No. 7881576 US Pat. No. 6,648,520 US Pat. No. 7,137,742 US Pat. No. 7,572,065

As a method of fixing the housing to the optical cable, there is a method of caulking a metal member with a tool. However, in the method of caulking the metal member, it is necessary to insert the metal member into the optical cable in advance when assembling the optical connector, which complicates the assembling work.
Patent Document 4 describes that two parts (a main body 36 and a cover 41) having a halved structure are bonded to a tensile body of an optical cable and the adhesive overflowing from the bleed opening (reference numeral 122) is wiped off. . However, in Patent Document 4, it is considered that workability is poor because two parts (the main body 36 and the cover 41) having a halved structure are assembled after applying an adhesive in advance.

  An object of the present invention is to easily fix a housing of an optical connector to a strength member of an optical cable.

A main invention for achieving the above object is an optical connector attached to an end of an optical cable having an optical fiber and a tensile body, and a ferrule that holds the end of the optical fiber;
A fixing housing that covers at least a part of the optical fiber extending from the ferrule and is fixed to the optical cable, and the fixing housing includes an insertion hole in which the optical fiber and the tensile body can be disposed. the communicated with the outside of the internal and the fixed housing of the insertion hole, the internal adhesive of the insertion hole have a filling adhesives filled windows, the insertion hole, the extent of the optical cable can not be inserted And an optical connector characterized in that it is a size that can pass through the ferrule .

  Other characteristics of the present invention will be made clear by the description and drawings described later.

  According to the present invention, the housing of the optical connector can be easily fixed to the tensile body of the optical cable.

1A and 1B are explanatory diagrams of the optical connector system 1. FIG. FIG. 1A is a perspective view of the receptacle-side optical connector 100. FIG. 1B is a perspective view of the plug-side optical connector 10. FIG. 2 is a cross-sectional view of the receptacle-side optical connector 100 and the plug-side optical connector 10. FIG. 3 is an exploded view of the receptacle-side optical connector 100. 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 cross-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 cap O-ring 27. FIG. 7 is an exploded view of the inner housing 30 and the applying mechanism 40. FIG. 8A to FIG. 8F are explanatory views showing 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 during bonding. FIG. 10 is a cross-sectional view of the inner housing 30. FIG. 11 is an explanatory diagram of an inner housing 30 according to another embodiment.

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

  An optical connector attached to an end portion of an optical cable having an optical fiber and a tensile body, the ferrule holding the end portion of the optical fiber, and covering at least a part of the optical fiber extending from the ferrule, the optical cable A fixing housing fixed to the insertion housing, wherein the fixing housing communicates an insertion hole in which the optical fiber and the tensile body can be arranged, and an inside of the insertion hole and an outside of the fixing housing. The optical connector is characterized by having an adhesive filling window capable of being filled with an adhesive inside the insertion hole. According to such an optical connector, the housing of the optical connector can be easily fixed to the tensile body of the optical cable.

  In the optical cable, the optical fiber is disposed between the two strength members, and the adhesive filling window is in a direction perpendicular to the direction in which the two strength members are aligned and the longitudinal direction of the optical cable. It is desirable that the fixing housing is formed so as to open. Thereby, the operation | work which apply | coats an adhesive agent to two strength members becomes easy.

  It is desirable that the adhesive filling window has a shape extending along the longitudinal direction of the optical cable. Thereby, the area | region where an adhesive agent is apply | coated between a strength body and the inner wall of a fixing housing becomes long, and both adhesion fixation becomes strong.

  The width of the adhesive filling window is preferably wider than the width of the optical fiber. Thereby, the visibility from the adhesive filling window is improved, and the operation of applying the adhesive is facilitated.

  Two protrusions protruding toward the optical cable are formed at the rear end portion of the fixing housing, and it is preferable that the outer cover of the flat optical cable is held by the two protrusions. Thereby, the position shift of the fixing housing with respect to the optical cable before bonding can be suppressed, and the work of filling the adhesive becomes easy.

  It is desirable that the insertion hole has such a size that the optical cable cannot be inserted and can pass through the ferrule. Thereby, the optical connector can be miniaturized.

  An optical cable with a connector having an optical fiber and a tensile body, and having an optical connector attached to an end, wherein the optical connector is fixed to the optical cable and holds the end of the optical fiber And a fixing housing fixed to the optical cable while covering at least a part of the optical fiber extending from the ferrule, and the fixing housing is an insertion through which the optical fiber and the tensile body can be disposed. A hole, an inside of the insertion hole and the outside of the fixing housing, and an adhesive filling window capable of filling the inside of the insertion hole with an adhesive, and the strength member of the optical cable includes: An optical cable with a connector characterized by being fixed to the fixing housing by the adhesive filled in the insertion hole It made. According to such an optical cable with a connector, the housing of the optical connector can be easily fixed to the tensile body of the optical cable.

=== Embodiment ===
Before describing the structure of the optical connector (plug-side optical connector 10) of this 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 Receptacle Side Optical Connector 100>
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 receptacle-side optical connector 100. FIG. 1B is a perspective view of the plug-side optical connector 10. FIG. 2 is a cross-sectional view of the receptacle-side optical connector 100 and the plug-side optical connector 10. As shown in FIG. 2, the optical connector system 1 includes 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 this 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, the plug-side optical connector 10 also has a cap). 60 is removable).

  In the following description, each direction is defined as shown in the figure. That is, the connector mounting / removal direction is “front / rear direction”, the opposite optical connector side is “front”, and the opposite side is “rear”. The longitudinal direction of the optical fiber in the optical connector is the front-rear direction. Also, the right-hand side when viewed from the rear side toward the front side with the major 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) being the left-right direction. 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 “up-down direction”.

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

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

The receptacle-side optical connector 100 includes a connector main body 110, an external housing 120, and an internal housing 130.
The connector main body 110 is a member having a ferrule 111 and a housing portion 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 a single-core optical fiber is used. The housing portion 112 is a plastic housing portion that houses the ferrule 111. Here, an SC connector which is a general-purpose connector is used as the connector body 110.

  The outer housing 120 is a member that accommodates the connector main body 110 via the inner housing 130. Here, the external housing 120 accommodates the connector main body 110 via the internal housing 130, but the connector main body 110 may be accommodated without the internal housing 130. The outer housing 120 includes a housing part 121, a coupling part 122, a front sleeve part 123, and a flange part 124.

  The accommodating part 121 is a part that accommodates the connector main body 110 and the inner housing 130. The accommodating part 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 (rotating part 21) on the plug side. Here, a bayonet type BNC type coupling mechanism, which is also employed in an electrical coaxial connector, is employed as the coupling portion 122. For this reason, the coupling portion 122 on the receptacle side is formed in a cylindrical shape, and protrusions 122 </ b> A are formed on the outer peripheral surface and the inner peripheral surface of the cylindrical coupling portion 122.

  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 outer housing 120 (and the receptacle-side optical connector 100) to the board (see FIG. 2). A gasket 125 for waterproofing is disposed 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 part 131 and a fixing part 132. The latch part 131 is a member for fastening the connector main body 110. A sleeve portion 131A is formed in the latch portion 131, and the ferrule 111 of the connector main body 110 is inserted into the sleeve portion 131A. That is, the sleeve portion 131 </ b> A and the front sleeve portion 123 of the external 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 outer housing 120. The fixing portion 132 is fixed to the outer housing 120 with a screw, so that the latch portion 131 is prevented from coming off.

  The receptacle-side optical connector 100 further has a cap 160. The cap 160 is a member that covers the coupling portion 122 on the receptacle side in order to protect the coupling portion 122 of the receptacle-side optical connector 100. The cap 160 is connected to the receptacle-side optical connector 100 (external 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 the protrusion 122A of the coupling portion 122 is aligned with the key groove 160A. As shown in FIG. 1A, a 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 rotated and then pulled out.

  A hexagonal hole 160B is formed on the front side of the cap 160 on the receptacle side (see FIG. 3). By inserting the hexagon wrench portion 60A (see FIG. 1B) of the plug-side cap 60 into the hexagon 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 cross-sectional view of the optical cable 3. FIG. 4B is a perspective view of the optical cable 3.
The optical cable 3 includes an optical fiber 5 and two strength members 7. The optical fiber 5 is accommodated in a tube cable 4 in which a gel 4B is filled in a tube 4A. 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. For this reason, two strength members 7 are arranged inside the optical cable 3 so as to sandwich the optical fiber 5. Since the tube cable 4 is disposed so that the two strength members 7 are sandwiched between them, the optical cable 3 configured by covering these with the outer cover has a flat cross section.
The optical cable 3 further includes 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 lip cord 9 is a string-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 tensile body 7. However, the arrangement of the waterproof member 8 and the lip cord 9 is not limited to this. Further, the optical cable 3 may not include the waterproof member 8 and the lip cord 9.

  FIG. 5 is an exploded view of the plug-side optical connector 10. A configuration of the plug-side optical connector 10 will be described with reference to FIGS. 1, 2, and 5.

  The plug-side optical connector 10 is a connector attached to the 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 becomes 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 coupling portion 22 on the plug side in order to protect the coupling portion 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). The plug-side cap 60 is formed with a hexagonal wrench portion 60A. The plug-side cap 60A is inserted into the hexagonal hole 160B of the receptacle-side cap 160 and used to attach and detach the receptacle-side cap 160. The hexagon wrench portion 60A is further formed with a through hole 60B. When it is difficult to remove the cap 60 attached to the plug-side optical connector 10, it is easy to remove the cap 60 by inserting a rod-shaped member (not shown) into the through hole 60B and rotating the cap 60 using the rod-shaped member. Become.

  The plug-side optical connector 10 includes a ferrule 11, a rotating part 21, an external housing 23, an internal housing 30, and an applying 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 body portion 11A and a flange portion 11B. The ferrule body 11A is a cylindrical zirconia part that holds the end of the single-core optical fiber. The flange portion 11B is a portion (a collar portion) that is disposed on the rear side of the ferrule main body portion 11A and projects outward from the outer peripheral surface of the ferrule main body portion 11A.

・ Rotating part 21
The rotating portion 21 is a member that is coupled to the receptacle-side coupling portion 122, and is a cylindrical member (coupling portion) that can be rotated outside the external housing 23 (insertion portion 24A). The rotating portion 21 and the insertion portion 24A of the external housing 23 constitute a bayonet type BNC type coupling mechanism (coupling portion 22). The rotating part 21 is formed with an entry part 21A and a locking part 21B. When connecting to the receptacle-side coupling portion 122, the receptacle-side projection portion 122A (projection portion 122A on the outer peripheral surface of the coupling portion 122) is passed through the entry portion 21A, and then the plug-side rotation portion 21 is rotated to project the projection. The part 122A is locked (hooked) to 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 portion that houses 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 screw thread is not shown in FIG. 5) is formed on the outer peripheral surface of the rear end portion of the front housing 24, and the male screw and the female screw of the rear housing 26 are connected. The rear housing 26 functions like a nut that fits into the front housing 24.

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

The insertion portion 24A is a portion on the front side of the front housing 24, and is a portion that is inserted inside the cylindrical coupling portion 122 on the receptacle side. The insertion portion 24 </ b> A constitutes the coupling portion 22 of the plug-side optical connector 10 together with the rotating portion 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 to the receptacle-side coupling portion 122, the plug-side insertion portion 24A has a cylindrical shape on the receptacle side while aligning the receptacle-side projection 122A (the projection 122A on the inner peripheral surface of the coupling portion 122) with the key groove 241. It will be inserted into the connecting part 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 the gap.

  The support portion 24 </ b> B is a portion that supports the rotating portion 21 to be rotatable with respect to the front housing 24. The support portion 24 </ b> B is formed on the outer peripheral surface of the center portion of the front housing 24.

  Note that the rear end surface 24C of the front housing 24 has a front edge of the flange portion 30A of the inner housing 30 (a front flange formed by the first flange portion 33E of the first housing 33 and the second flange portion 341C of the second housing 34). It is a contact part which contacts part 32A).

  The rear housing 26 is a cylindrical member that is attached to the rear side of the front housing 24 and accommodates the rear side of the inner housing 30. The rear housing 26 has a contact portion 26A and an attachment 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 the rear edge of the flange portion 30A of the inner housing 30 (the rear flange portion 31E of the fixing housing 31). It is a part which contacts with. Between the contact portion 26A and the rear end surface 24C of the front housing 24, the flange portion 30A of the inner housing 30 is sandwiched from the front and rear. A boot 51 is attached to the attachment portion 26B. A shrink sleeve 52 (see FIG. 2) is disposed between the attachment portion 26B and the boot 51. The shrink sleeve 52 is filled with a filler (not shown), and the shrink sleeve 52 closes a gap between the rear end portions of the outer housing 23 and the inner housing 30 and the optical cable 3.

The outer housing 23 further includes 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 portion when the connector is connected. The fitting O-ring 25 is disposed on the outer peripheral surface of the insertion portion 24A inside the rotating portion 21, and when the insertion portion 24A is inserted inside the coupling portion 122 of the receptacle-side optical connector 100, the receptacle-side optical connector. It contacts the inner peripheral surface of 100 coupling parts 122. Accordingly, when the connector is connected, the insertion portion 24A, which is the plug-side coupling portion 22, and the receptacle-side coupling portion 122 are waterproofed, so that the receptacle-side ferrule 111 and the plug-side ferrule 11 abut ( The optical connection part) can be waterproofed.

  A key groove 241 for the protrusion 122A inside the coupling portion 122 on the receptacle side is formed on the outer peripheral surface of the insertion portion 24A, but the fitting O-ring 25 is located behind the key groove 241. Arranged on the side. As a result, water from the keyway 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, the plug-side coupling portion 22 (in this case, the rotating portion 21) is connected to the connector side when the connector is connected. The fitting O-ring 25 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 portion 21, the waterproofness of the fitting O-ring 25 may be reduced as compared with the present embodiment. For this reason, as in this embodiment, by disposing the fitting O-ring 25 on the outer peripheral surface of the insertion portion 24A, between the plug-side insertion portion 24A and the receptacle-side cylindrical coupling portion 122 when the connector is connected. It is desirable to dispose the fitting O-ring 25 on the rim.

  FIG. 6B is an explanatory diagram of the arrangement of the cap O-ring 27. The cap O-ring 27 is a waterproof member that waterproofs the optical connecting portion when the optical connector 10 is capped. The cap O-ring 27 is disposed 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. Thereby, 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.

  By the way, in this embodiment, the fitting O-ring 25 and the cap O-ring 27 are provided separately. If the fitting O-ring 25 is to be used as the cap O-ring 27, the cap is inserted into the gap between the rotating portion 21 and the insertion portion 24A, so that the rotating portion 21 is protected by the cap. Will not be able to. Since the cap O-ring 27 is disposed on the rear side of the rotating portion 21, it is difficult to use the cap O-ring 27 as the fitting O-ring 25. Therefore, in this embodiment, a waterproof member (fitting O-ring 25) that waterproofs the optical connection portion when the connector is connected, and a waterproof member (cap O-ring 27) 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 disposed 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 applying mechanism 40. FIG. 8A to FIG. 8F are explanatory views showing a state when the inner housing 30 and the applying mechanism 40 are assembled. The assembly work of the optical connector 10 may be performed in an assembly 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 from which the coating has been removed) on the rear side of the ferrule 11 inside the outer housing 23. It is a member that protects the optical fiber 5 (the bare fiber from which the coating has been 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, a reinforcing tube 35 is disposed 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 is unnecessary, but in this case, the reinforcing tube 35 can be accommodated. A simple inner 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 is fixed to the optical cable 3 (specifically, the tensile strength member 7) while covering at least a part of the optical fiber 5 extending from the ferrule 11. 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 configured, 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 led out from the optical cable 3 is inserted. The optical fiber 5 and the two strength members 7 of the optical cable 3 can be inserted into the insertion hole 31A. The strength member 7 may or may not penetrate through the insertion hole 31A. Here, the front end of the strength member 7 is disposed 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 has a size that allows the entire optical cable 3 to be inserted, the fixing housing 31 is increased in size, whereas in this embodiment, the insertion hole 31A can be reduced, so that the fixing housing 31 can be reduced in size.

  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 when the optical connector 10 is assembled, the fixing housing 31 cannot be disposed in advance behind the lead-out portion of the optical cable 3. However, in the present embodiment, the insertion hole 31 </ b> A is configured to have a size that can 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 optical fiber 5 is fused (see FIGS. 8A and 8B described later), the insertion hole 31A of the fixing housing 31 is formed by the optical cable 3. Restrictions during assembly due to the inability to insert are 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 rather than crimping, the housing can be easily attached. Further, since the adhesive is filled from the adhesive filling window 31B, the work of applying the adhesive between the strength member 7 and the inner wall of the fixing housing 31 becomes easy. Further, since the application state of the adhesive inside the fixing housing 31 can be confirmed 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 during bonding.
The adhesive filling window 31B is formed in the fixing housing 31 so as to open in the vertical direction. That is, the adhesive filling window 31B opens in a direction (vertical direction) perpendicular to the direction in which the two strength members 7 are arranged (left-right direction) and the longitudinal direction (front-rear direction) of the optical cable 3. Is formed. Thereby, the operation | work which apply | coats an adhesive agent to the two strength members 7 becomes easy.

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

  The width in the left-right direction of the adhesive filling window 31B 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 is facilitated.

  Protruding portions 31C are formed on the upper and lower sides of the rear end portion of the fixing housing 31 so as to protrude rearward. The upper and lower protrusions 31 </ b> C grip the outer jacket of the optical cable 3 from the vertical direction. That is, the upper and lower protrusions 31C grip the flat optical cable 3 from the short diameter direction. Thereby, the position shift (especially position shift of 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.

  Engagement holes 31D are formed above and below the front end portion of the fixing housing 31, respectively. Engagement claws (first engagement claws 33C and second engagement claws 341B) formed at the rear end of the central housing 32 (first housing 33 and second housing 34) are engaged with the engagement holes 31D. Match. Thereby, the position shift of the center housing 32 (the 1st housing 33 and the 2nd housing 34) with respect to the housing 31 for fixation can be suppressed.

  A rear flange 31E is formed on the front side of the fixing housing 31. The rear flange 31 </ b> E and the front flange 32 </ b> A of the central housing 32 constitute a flange 30 </ b> A of the internal housing 30. The rear flange 31 </ b> E is in contact with the contact portion 26 </ b> A of the rear housing 26 that becomes the external housing 23.

  The fixing housing 31 is inserted from the front side of the ferrule 11 as shown in FIG. 8B after the optical fiber 5 is fused and the reinforcing tube 35 is disposed at the fusion point as shown in FIG. It is attached to the lead-out part. Since the fixing housing 31 can be inserted and attached from the front side of the ferrule 11 after the optical fiber 5 is fused, it can be set in the fuser even if the optical fiber 5 led out from the optical cable 3 is short. Compared to the case where the fixing housing 31 has to be disposed in advance behind the ferrule 11, the optical connector 10 can be downsized.

  Before attaching the fixing housing 31 to the optical cable 3, the members (the rear housing 26, the shrink sleeve 52 and the boot 51) arranged on the rear side of the fixing housing 31 are arranged on the rear side of the lead portion of the optical cable 3. It will be inserted into. 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 cross-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 has been removed) on the rear side of the ferrule 11 and is a member (housing) that can accommodate the reinforcing tube 35. The central housing 32 is located in the central portion of the inner housing 30 and is located on the front side of the fixing housing 31.

  A front flange 32 </ b> A is formed on the rear side of the central housing 32. The front side collar part 32 </ b> A and the rear side collar part 31 </ b> E of the fixing housing 31 constitute a collar part 30 </ b> A of the internal housing 30. The front collar portion 32 </ b> A is in contact with the rear end surface 24 </ b> C of the front housing 24 that becomes the outer housing 23. Note that the flange portion 30A (the front flange portion 32A and the rear flange portion 31E) of the inner housing 30 is sandwiched from the front and rear between the rear end surface 24C of the front housing 24 and the contact portion 26A of the rear housing 26. Thus, 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 can be formed as a cylindrical integrated structure, in the present embodiment, the first housing 33 and the second housing 34 are divided into substantially half structures. 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 the lower portion of the reinforcing tube 35. The first housing 33 includes 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.
The first accommodating portion 33A is a portion that accommodates the lower portion of the reinforcing tube 35. 33 A of 1st accommodating parts are formed in the concave shape along the front-back direction.

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

  The first engaging claw 33 </ b> C is a portion protruding from the rear end portion of the first housing 33 to the rear side (the fixing housing 31 side), and is a portion that engages with the engaging hole 31 </ b> D of the fixing housing 31. When the first engagement claw 33C engages with the engagement hole 31D of the fixing housing 31, the displacement of the first housing 33 with respect to the fixing housing 31 can be suppressed, and the drop-off 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. Guide part 33D is formed in the outer peripheral surface of the semi-cylindrical 1st housing 33 as a protruding item | line along the front-back direction. 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 the guide portion 33 </ b> D of the first housing 33.

  The first flange portion 33 </ b> E is a part constituting the front flange portion 32 </ b> A of the central housing 32. The first flange portion 33 </ b> E is a portion protruding 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 fixing housing 31 is attached to the optical cable 3 (see FIG. 8C), the first housing 33 is inserted into the engaging hole 31D of the fixing housing 31 as shown in FIGS. 8C and 10. The U-shaped trailing edge pressing portion 33B is inserted between the flange portion 11B of the ferrule 11 and the reinforcing tube 35 while being engaged so as to cover the lower portion of the reinforcing tube 35.

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

  The semi-cylindrical portion 341 is a semi-cylindrical portion on the rear side of the cylindrical portion 342, and has a second accommodating portion 341A (see FIG. 10) that accommodates the upper portion of the reinforcing tube 35. The second housing portion 341A is formed in a concave shape along the front-rear direction. A second engagement claw 341B is formed at the rear end portion of the semi-cylindrical portion 341 so as to protrude rearward (fixing housing 31 side). The second engagement claw 341 </ b> B is a portion that engages with the engagement hole 31 </ b> D of the fixing housing 31. The semi-cylindrical portion 341 covers a part of the semi-cylindrical first housing 33 from the outside, and the inner peripheral surface covering the first housing 33 is arranged in the front-rear direction so as to fit the guide portion 33D of the first housing 33. A guide groove (not shown) is formed. Further, a second flange portion 341 </ b> C 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 front portion of the semi-cylindrical portion 341 and is a cylindrical portion that covers the flange portion 11 </ b> B of the ferrule 11. A holding portion 342 </ b> A is formed on the front edge of the cylindrical portion 342. As shown in FIG. 10, the rear surface (inner surface) of the pressing portion 342 </ b> A is in contact with the front edge of the flange portion 11 </ b> B of the ferrule 11, and the ferrule 11 can be prevented from moving to the front side. That is, the flange portion 11B of the ferrule 11 is pressed from both 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 in the front-rear direction of the ferrule 11 is fixed. A hole is formed in the center portion of the holding portion 342A, and the ferrule body portion 11A protrudes from the hole. The front surface of the pressing portion 342A is in contact with the rear end of a spring 42 described later.

After the first housing 33 is attached (see FIG. 8C), the second housing 34 is fitted 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. On the other hand, it is slid rearward and attached to the position shown in FIG. 8D. 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 vertical direction or the horizontal direction with respect to the first housing 33 is limited. 2 The housing 34 is less likely to be displaced with respect to the first housing 33, and the mounting operation of the second housing 34 is facilitated.
When the second housing 34 is slid rearward, the second engagement claw 341B engages with the engagement hole 31D of the fixing housing 31 as shown in FIG. Thereby, the position shift of the 2nd housing 34 with respect to the housing 31 for fixation can be suppressed.
Further, when the second housing 34 is slid rearward, as shown in FIG. 10, the ferrule body 11 </ b> A protrudes from the center hole of the pressing portion 342 </ b> A of the cylindrical portion 342, and the ferrule is inside the cylindrical portion 342. 11 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 with the rear edge pressing portion 33B of the first housing 33. Thereby, the flange part 11B of the ferrule 11 is pressed from both front and rear sides, and the position of the ferrule 11 in the front-rear direction is fixed.

  As shown in FIG. 8D, when the second housing 34 is attached, the central housing 32 is configured 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. The front flange 32A and the rear side of the fixing housing 31 are formed. The flange portion 31E constitutes the flange portion 30A of the inner housing 30 (the flange portion 30A to be clamped 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 applying mechanism 40 includes a movable housing 41 and a spring 42.

  The movable housing 41 is a member (housing) that is movable in the front-rear direction while accommodating the ferrule body 11A. The movable housing 41 functions as a housing that covers the ferrule main body portion 11A, thereby protecting the ferrule main body portion 11A. The movable housing 41 has a cylindrical shape, and the ferrule body 11A is inserted through the center, and a spring 42 is housed in the center cavity. The movable housing 41 is disposed in front of the central housing 32, and the spring 42 is disposed 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 11 </ b> A is inserted into the central cavity of the spring 42. The spring 42 is disposed 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 342 </ b> A of the second housing 34.
The spring 42 is attached to the ferrule main body 11A protruding forward from the second housing 34 as shown in FIG. 8E after the second housing 34 is attached (see FIG. 8D).

  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 plug-side ferrule 11 is inserted into the receptacle-side front sleeve portion 123 (see FIG. 2) when the connector is connected, the receptacle-side front sleeve portion 123 enters the gap between the movable housing 41 and the ferrule 11. Become.

  The movable housing 41 is exposed from the opening on the front side of the insertion portion 24A, and is disposed so as to slightly protrude from the front edge of the insertion portion 24A (see FIG. 2). Since the movable housing 41 protrudes to the front side of the insertion portion 24A, the movable housing 41 comes into contact with the receptacle-side optical connector 100 (specifically, the root of the front sleeve portion 123 of the external housing 120) when the connector is connected. 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 portion 122A). And the coupling portion 22 on the plug side (the locking portion 21B of the rotating portion 21) are strengthened (hooked) and are difficult to come off.

  The movable housing 41 has a flange 41A. The foremost position of the movable housing 41 relative to the front housing 24 is defined by the flange 41 </ b> A coming into contact with a protrusion (not shown) formed on the inner peripheral surface of the front housing 24. Thereby, the movement to the rear side of the movable housing 41 when the connector is connected is allowed while preventing the front of the movable housing 41 being given a force from the spring 42 to the front side.

  After the spring 42 is attached to the ferrule body 11A (see FIG. 8E), the movable housing 41 is attached from the front so as to accommodate the spring 42 as shown in FIG. 8F. Thereafter, the front housing 24 to which the rotating part 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 in the optical cable 3 are fitted (screwed) to be connected. . At this time, the flange portion 30A of the inner housing 30 is sandwiched from the front and rear between the contact portion 26A of the rear housing 26 and the rear end surface 24C of the front housing 24. When the front housing 24 is connected to the rear housing 26, the flange portion 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 arrange | positions in the state compressed with the internal housing 30 (pressing part 342A of the 2nd housing 34).

  By the way, the repulsive force of the spring 42 has a function of making it difficult to disengage the coupling (hook) between the receptacle-side coupling portion 122 (projection portion 122A) and the plug-side coupling portion 22 (the locking portion 21B of the rotating portion 21). . Since the spring 42 having such a function is disposed on the front side of the housing part 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 arranged on the rear side of the housing part 11B of the ferrule 11, it is necessary to arrange a spring behind the ferrule 11 in advance before fusion. Since the optical fiber 5 led out from the optical cable 3 can be set to the fuser even if it is short, the optical connector 10 can be miniaturized.

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

<Summary>
The plug-side optical connector 10 is an optical connector attached to the end of the optical cable 3 having the optical fiber 5 and the strength member 7, and extends from the ferrule 11 that holds the end of the optical fiber 5. And a fixing housing 31 fixed to the optical cable 3 while covering at least a part of the optical fiber. The fixing housing 31 has an insertion hole 31A in which the optical fiber 5 and the strength member 7 can be disposed, and an adhesive filling window 31B in which an adhesive can be filled in the insertion hole 31A. Accordingly, the metal member can be fixed with an adhesive instead of being joined by caulking, so that the mounting operation of the housing is simplified. Further, since the adhesive is filled from the adhesive filling window 31B, the work of applying the adhesive between the strength member 7 and the inner wall of the fixing housing 31 becomes easy.

  As shown in FIG. 9, the adhesive filling window 31 </ b> B opens in a direction (up and down direction) perpendicular to the direction in which the two strength members 7 are arranged (left and right direction) and the longitudinal direction (front and back direction) of the optical cable 3. Thus, the fixing housing 31 is formed. Thereby, the operation | work which apply | coats an adhesive agent to the two strength members 7 becomes easy. However, the adhesive filling window 31B may be formed in the fixing housing 31 so as to open in the left-right direction, for example.

  As shown in FIG. 9, the adhesive filling window 31 </ b> B has a shape extending along the front-rear direction (longitudinal direction of the optical cable 3). As a result, the adhesive can be applied along the longitudinal direction of the strength member 7 in the fixing housing 31, and the region where the adhesive is applied between the strength member 7 and the inner wall of the fixing housing 31 becomes longer. , The adhesion and fixation of both of them become strong. However, for example, when viewed from above, the adhesive filling window 31B may be formed in a square opening.

  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, the visibility from the adhesive filling window 31B is improved, and the operation of applying the adhesive is facilitated. However, the adhesive filling window 31B can be configured such that the width in the left-right direction of the adhesive filling window 31B is narrower than the width of the optical fiber 5.

  Two protruding portions 31C protruding rearward (optical cable side) are formed at the rear end of the fixing housing. Then, as shown in FIG. 8B and FIG. 10, the outer cover of the flat optical cable can be held by the two protrusions. For this reason, the position shift (especially position shift of 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.

  The insertion hole 31A has such a size 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 optical cable 3 cannot be inserted into the insertion hole 31 </ b> A of the fixing housing 31 in this way, there is a restriction that the fixing housing 31 cannot be disposed in advance behind the lead-out portion of the optical cable 3 when the optical connector 10 is assembled. . On the other hand, since the insertion hole 31A is configured to have a size that allows the ferrule 11 to pass, the fixing housing 31 can be inserted from the front side of the ferrule 11 and attached after the optical fiber 5 is fused. Therefore (see FIGS. 8A and 8B), restrictions during assembly are allowed.

=== Another Embodiment ===
The above-described internal housing 30 includes a fixing housing 31 and a central housing 32 (the first housing 33 and the second housing 34). However, the shape of the internal housing 30 (or the fixing housing 31) is not limited to this.
FIG. 11 is an explanatory diagram of an inner housing 30 according to another embodiment. In addition, the configuration other than the internal housing 30 (for example, the rotating unit 21 and the external housing 23) is the same as that of the above-described embodiment. In the inner housing 30 of this embodiment, a fixing housing 31 and the above-described central housing 32 are integrally formed. In other words, the fixing housing 31 of the present embodiment is configured by integrally forming the above-described central housing 32 and can accommodate the reinforcing sleeve 35 therein. The fixing housing 31 of this embodiment also has an insertion hole 31A (not shown in FIG. 11) and an adhesive filling window 31B. Thereby, the operation | work which fixes the housing 31 for fixation to the optical cable 3 becomes easy.

  In the present embodiment, a portion corresponding to the above-described central housing 32 (the first housing 33 and the second housing 34) is integrally configured, and the trailing edge pressing portion 33B of the first housing 33 is formed. It has not been. For this reason, the fixing housing 31 of the present embodiment is configured to be insertable from the front side of the ferrule 11 after the optical fiber 5 is fused.

  In the above-described embodiment and this embodiment, the spring 42 is arranged in front of the flange portion 11B of the ferrule 11. However, the ferrule 11 may be configured such that a spring is disposed behind the flange portion 11B of the ferrule 11 so that the ferrule 11 can be retracted. Even in such a configuration, if the fixing housing 31 has the adhesive filling window 31B, the operation of fixing (adhering) the fixing housing 31 to the optical cable 3 becomes easy.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and it goes without saying that the present invention includes equivalents thereof.

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

1 optical connector system, 3 optical cable (optical cable with connector),
5 Optical fiber, 7 Tensile body,
10 Plug side optical connector (optical connector),
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 side end surface,
241 keyway, 25 fitting O-ring,
26 rear housing, 26A contact portion, 26B mounting portion,
27 O-ring for cap,
29 O-ring for housing,
30 inner housing, 30A buttocks,
31 fixing housing, 31A insertion hole,
31B adhesive filling window, 31C protrusion,
31D engagement hole, 31E rear collar,
32 central housing, 32A front buttock,
33 first housing, 33A first housing portion,
33B trailing edge pressing portion, 33C first engaging claw,
33D guide section, 33E first collar section,
34 second housing, 341 semi-cylindrical part,
341A second accommodating portion, 341B second engaging claw, 341C second collar portion,
342 cylindrical part, 342A holding part,
35 reinforcing tube, 40 applying mechanism,
41 movable housing, 41A buttocks,
42 springs, 51 boots, 52 shrink sleeves,
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 coupling part, 122A projection part,
123 front sleeve, 124 flange, 125 packing,
130 inner housing, 131 latching part,
131A Sleeve part, 132 fixing part,
160 receptacle side cap, 160A keyway,
160B Hexagon socket, 161 connecting member

Claims (7)

  1. An optical connector attached to an end of an optical cable having an optical fiber and a tensile body,
    A ferrule that holds the end of the optical fiber;
    A fixing housing fixed to the optical cable while covering at least a part of the optical fiber extending from the ferrule,
    The fixing housing has an insertion hole in which the optical fiber and the tensile body can be disposed, communicates the inside of the insertion hole and the outside of the fixing housing, and fills the insertion hole with an adhesive. have a and possible adhesive filling window,
    The optical connector is characterized in that the insertion hole has such a size that the optical cable cannot be inserted and can pass through the ferrule .
  2. The optical connector according to claim 1,
    In the optical cable, the optical fiber is disposed between the two strength members,
    The optical connector is characterized in that the adhesive filling window is formed in the fixing housing so as to open in the direction in which the two strength members are aligned and in the direction perpendicular to the longitudinal direction of the optical cable.
  3. The optical connector according to claim 1 or 2,
    The optical connector is characterized in that the adhesive filling window has a shape extending along the longitudinal direction of the optical cable.
  4. The optical connector according to any one of claims 1 to 3,
    The width of the adhesive filling window is wider than the width of the optical fiber.
  5. The optical connector according to any one of claims 1 to 4,
    Two protrusions protruding toward the optical cable are formed at the rear end of the fixing housing,
    An optical connector characterized in that an outer sheath of the flat optical cable is held by the two protruding portions.
  6. An optical cable with a connector having an optical fiber and a tensile body and having an optical connector attached to the end,
    The optical connector is
    A ferrule that holds the end of the optical fiber;
    A fixing housing fixed to the optical cable while covering at least a part of the optical fiber extending from the ferrule,
    The fixing housing has an insertion hole in which the optical fiber and the tensile body can be disposed, communicates the inside of the insertion hole and the outside of the fixing housing, and fills the insertion hole with an adhesive. A possible adhesive filling window,
    The insertion hole is of a size that the optical cable cannot be inserted, and is a size that can pass through the ferrule,
    The optical cable with a connector, wherein the strength member of the optical cable is fixed to the fixing housing by the adhesive filled in the insertion hole.
  7.   A method of attaching an optical connector to an end of an optical cable having an optical fiber and a tensile body,
      The optical connector is
            A ferrule that holds the end of the optical fiber;
            A fixing housing fixed to the optical cable while covering at least a part of the optical fiber extending from the ferrule;
    With
      The fixing housing has an insertion hole in which the optical fiber and the tensile body can be disposed, communicates the inside of the insertion hole and the outside of the fixing housing, and fills the insertion hole with an adhesive. A possible adhesive filling window,
      The insertion hole is of a size that the optical cable cannot be inserted, and is a size that can pass through the ferrule,
      When the attachment / detachment direction of the optical connector is the front-rear direction, the other side of the optical connector is the front, and the opposite side is the rear,
      An optical connector mounting method comprising: attaching the fixing housing by inserting the fixing housing from the front side of the ferrule after fusing the optical fiber held by the ferrule and the optical fiber of the optical cable.
JP2015044428A 2015-03-06 2015-03-06 Optical connector, optical cable with connector, and optical connector mounting method Active JP6576051B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015044428A JP6576051B2 (en) 2015-03-06 2015-03-06 Optical connector, optical cable with connector, and optical connector mounting method

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2015044428A JP6576051B2 (en) 2015-03-06 2015-03-06 Optical connector, optical cable with connector, and optical connector mounting method
PCT/JP2015/083574 WO2016143202A1 (en) 2015-03-06 2015-11-30 Plug-side connector and optical connector system
US15/556,071 US10162125B2 (en) 2015-03-06 2015-11-30 Plug-side optical connector and optical connector system
CN201580077330.3A CN107430249B (en) 2015-03-06 2015-11-30 Plug side optical connector and optical connector system
CA2978049A CA2978049C (en) 2015-03-06 2015-11-30 Plug-side optical connector and optical connector system
MX2017011384A MX2017011384A (en) 2015-03-06 2015-11-30 Plug-side connector and optical connector system.

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EP3460548A1 (en) 2017-09-25 2019-03-27 Fujikura Ltd. Clamp member, optical connector, and manufacturing method of optical connector

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JP5401274B2 (en) * 2009-11-20 2014-01-29 株式会社フジクラ Optical transmission body with connector, optical connector, and optical connector assembly method
US9304262B2 (en) * 2011-11-23 2016-04-05 Commscope Technologies Llc Multi-fiber optic connector

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