JP5296623B2 - Optical connector and assembly method thereof - Google Patents

Description

  The present invention relates to an optical connector and a method for assembling the same, and more particularly, an optical fiber having an optical fiber core, a sheath for housing the optical fiber core, and a tensile body provided between the optical fiber core and the sheath. The present invention relates to an optical connector attached to a cord and an assembling method thereof.

  In this type of optical connector, it is necessary to fix the protruding portion of the optical fiber core wire protruding from the sheath and the strength member in a state where the protruding portion is securely abutted against the built-in optical fiber built in the ferrule. Moreover, in order to confirm the reliable butting state of a protrusion part and a built-in optical fiber, a part of protrusion part may be bent (for example, refer patent document 1).

JP 2005-316221 A JP 2007-279528 A

  In the case of a so-called tight optical fiber cord in which the optical fiber core wire does not move in the longitudinal direction with respect to the sheath and the tensile body, the operator holds the sheath, the tensile body, or a member that grips these by hand, It is possible to insert the optical fiber into the optical connector so that the protrusion and the built-in optical fiber are abutted to cause a part of the protrusion to bend.

  However, in the case of a so-called loose optical fiber cord in which the optical fiber core wire is movable in the longitudinal direction with respect to the sheath and the tensile body, the operator holds the sheath, the tensile body, or a member for gripping them by hand. However, when the protrusion is inserted into the optical connector, if the protrusion is caught or inserted into the optical connector, the protrusion is pushed back into the sheath without being inserted further into the optical connector. . For this reason, it was difficult to butt the protruding portion against the built-in optical fiber.

  Therefore, in the case of this loose optical fiber cord, the distal end side of the sheath is compressed from the outside or sandwiched with a clip or the like, and the optical fiber core wire is fixed to the sheath and the tensile body, thereby the protruding portion. A method has been devised in which the protrusion is abutted against the built-in optical fiber while being pushed back into the sheath.

  However, in this method, when the outer diameter of the optical fiber cord is large or the sheath is thick, it is difficult to fix the optical fiber core wire to the sheath and the tensile body, and the protruding portion is attached to the built-in optical fiber. It was difficult to match.

  Further, when the distal end side of the sheath is left sandwiched between clips, the optical fiber cord becomes pseudo tight. For this reason, even after the optical connector is assembled, a part of the protruding portion is bent (extra length). However, it is necessary to secure a space in the optical connector for accommodating the bending of the protruding portion so that the bending of the protruding portion is maintained at an appropriate curvature that does not impair the optical characteristics and reliability. . For this reason, there exists a subject that an optical connector enlarges.

  The present invention has been made in view of the above problems, and even when a so-called loose optical fiber cord is used, the protrusion is not formed when the protrusion of the optical fiber core wire is inserted into the fiber fixing portion. It is an object of the present invention to provide an optical connector and an assembling method thereof capable of suppressing the pushing back into the sheath and reliably abutting the protruding portion with the built-in optical fiber.

  Another object of the present invention is to provide an optical connector that can be miniaturized and an assembling method thereof.

In order to solve the above-described problem, an optical connector according to claim 1 is provided with a ferrule having a built-in optical fiber and a ferrule integrated with the ferrule, and the built-in optical fiber is inserted therein, and an optical fiber cord sheath And a fiber fixing portion for fixing the protruding portion of the optical fiber core protruding from the end portion of the tensile body in a state of being abutted with the built-in optical fiber, and a configuration separate from the ferrule and the fiber fixing portion A cord fixing portion that is fixed to at least one of the sheath and the strength member, a core wire gripping portion that is provided integrally with the cord fixing portion and grips the protruding portion, the protruding portion, and the built-in portion after the optical fiber is fixed by the fiber fixing portion, and a releasing portion for releasing the gripping of the projecting portion by the core wire gripper There.

  This optical connector is attached to an optical fiber cord in the following manner, for example. That is, the cord fixing portion is fixed to at least one of the sheath and the tensile body, and the protruding portion of the optical fiber core that protrudes from the end portion of the sheath and the tensile body is formed by the core wire gripping portion integrally provided with the cord fixing portion. Hold it. Further, in this state, the core wire gripping portion is brought close to the fiber fixing portion together with the cord fixing portion, and the protruding portion gripped by the core wire gripping portion is inserted into the fiber fixing portion.

  Then, the protruding portion is abutted with the built-in optical fiber inside the fiber fixing portion, and the protruding portion is positioned between the core wire holding portion and the fiber fixing portion by adjusting the relative position of the core wire holding portion with respect to the fiber fixing portion. A part of the optical fiber is bent, and a reliable butted state between the protruding portion and the built-in optical fiber is confirmed.

  Subsequently, in this state, the protruding portion and the built-in optical fiber that are abutted with each other are fixed by the fiber fixing portion. Thereby, the optical connector is attached to the optical fiber cord.

  As described above, according to this optical connector, even a so-called loose optical fiber cord has the protruding portion by gripping the protruding portion by the core wire gripping portion provided integrally with the cord fixing portion. The optical fiber core wire can be made immovable in the longitudinal direction with respect to the sheath and the strength member. Accordingly, when the protruding portion is inserted into the fiber fixing portion, the protruding portion can be reliably abutted against the built-in optical fiber by suppressing the protruding portion from being pushed back into the sheath.

  According to this optical connector, when the grasping of the protruding portion by the core wire gripping portion is released by the releasing portion, the optical fiber core wire returns to a state in which it can move in the longitudinal direction with respect to the sheath and the tensile strength member. Can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending of a protrusion part in an optical connector, size reduction of an optical connector can be achieved.

The optical connector according to claim 2 is the optical connector according to claim 1 , wherein the release portion is brought into contact with the core wire gripping portion to deform the core wire gripping portion, thereby causing the core wire gripping portion to deform the optical connector. It is the structure which cancels | releases the holding | grip of a protrusion part.

  According to this optical connector, when the release portion is brought into contact with the core wire gripping portion and the core wire gripping portion is deformed, the gripping of the protruding portion by the core wire gripping portion can be released.

The optical connector according to claim 3 is the optical connector according to claim 2 , wherein the release portion comes into contact with the core wire gripping portion as the core wire gripping portion approaches the fiber fixing portion. Thus, the core wire gripping portion is deformed.

  According to this optical connector, it is possible to release the gripping of the protruding portion by the core wire gripping portion by a simple operation by simply bringing the core wire gripping portion closer to the fiber fixing portion.

The optical connector according to claim 4 is the optical connector according to claim 3 , wherein the core wire gripping portion extends from the cord fixing portion toward the fiber fixing portion, and the main body portion. A plurality of claws that can grip the protrusion, and the release portion is provided between the plurality of claws and the fiber fixing portion. It is set as the structure made into the extension part extended toward the nail | claw part.

  According to this optical connector, when the core wire gripping part is approached to the fiber fixing part, the extension part is brought into contact with the plurality of claw parts, and the plurality of claw parts are corded with the connecting part with the main body part as a fulcrum. By being deformed to the fixed portion side, the gripping of the protruding portion by the plurality of claw portions can be released.

The optical connector according to claim 5 is the optical connector according to claim 3 , wherein the core wire gripping portion extends from the cord fixing portion toward the fiber fixing portion so that the protruding portion can be gripped. An arm piece and a slidable contact portion formed on at least one of the plurality of arm pieces, and the release portion is associated with the core wire gripping portion approaching the fiber fixing portion. It is set as the sliding contact part slidably contacted with the said sliding contact part.

  According to this optical connector, when the core wire gripping portion is brought close to the fiber fixing portion, the sliding contact portion is slidably contacted with the sliding contact portion, and the arm piece in which the sliding contact portion is formed. Is deformed, whereby the gripping of the protruding portion by the plurality of arm pieces can be released.

An optical connector according to a sixth aspect is the optical connector according to the second aspect , wherein a housing having at least a housing main body that accommodates the fiber fixing portion and a movable portion that is movably supported by the housing main body. Further, the release portion is provided in the movable portion, and is brought into contact with the core wire gripping portion as the movable portion is displaced with respect to the housing main body to deform the core wire gripping portion. It is configured.

  According to this optical connector, the gripping of the protruding portion by the core wire gripping portion can be released by a simple operation of simply displacing the movable portion with respect to the housing body.

The optical connector according to claim 7 is the optical connector according to claim 6 , wherein the core wire gripping part extends from the cord fixing part toward the fiber fixing part to grip the protruding part. A plurality of arm pieces and an engaged portion formed on at least one of the plurality of arm pieces, and the release portion is configured such that the movable portion is displaced with respect to the housing body. Accordingly, the engaging portion is configured to be integrally displaced in the engaged state.

  According to this optical connector, when the movable part is displaced with respect to the housing body, the engaging part is integrally displaced in an engaged state with the engaged part, thereby forming the engaged part. The arm piece thus formed is deformed, whereby the gripping of the protruding portion by the plurality of arm pieces can be released.

An optical connector according to an eighth aspect of the present invention includes the optical connector according to the first aspect, further comprising a housing having a housing portion that accommodates at least the core wire gripping portion, and the core wire gripping portion extends from the cord fixing portion. A plurality of elastic pieces extending toward the fiber fixing portion and gripping the protruding portion in an elastically deformed state, and pressing the elastic pieces between the elastic pieces and the accommodating portion; A pressing portion for providing the elastic deformation state, and the releasing portion releases the pressing state of each elastic piece by the pressing portion when the plurality of elastic pieces approach the fiber fixing portion. It is said that.

  According to this optical connector, when a plurality of elastic pieces are accommodated in the accommodating portion, the plurality of elastic pieces are pressed and elastically deformed by the pressing portions provided between the elastic pieces and the accommodating portion, Thus, the protrusion can be gripped by the plurality of elastic pieces.

  According to this optical connector, when the plurality of elastic pieces approach the fiber fixing part after the protruding part and the built-in optical fiber are fixed to each other by the fiber fixing part, the plurality of elastic pieces by the pressing part are The pressed state is released by the release unit. Then, by restoring the plurality of elastic pieces to the original shape, it is possible to release the gripping of the protruding portion by the plurality of elastic pieces.

  Further, when the gripping of the protruding portion by the plurality of elastic pieces is released, the optical fiber core wire returns to a state in which it can move in the longitudinal direction with respect to the sheath and the tensile body, so that the bending of the protruding portion can be eliminated. . Thereby, since it is not necessary to ensure the space for accommodating the bending of a protrusion part in an optical connector, size reduction of an optical connector can be achieved.

The optical connector according to claim 9 is the optical connector according to claim 8 , wherein the pressing portion is a protrusion formed from one of the elastic piece and the accommodating portion to the other, and the release portion is In addition, the elastic piece and the accommodation portion are formed on the other side, and the protrusion is an escape portion into which the protrusion can enter.

  According to this optical connector, when the plurality of elastic pieces approach the fiber fixing part after the protruding part and the built-in optical fiber are fixed to each other by the fiber fixing part, the one of the elastic piece and the accommodating part is removed. The protrusion formed toward the other enters the escape portion formed on the other of the elastic piece and the accommodating portion. As a result, the plurality of elastic pieces are restored to the original shape, so that the gripping of the protruding portion by the plurality of elastic pieces can be released.

The optical connector according to claim 10 is the optical connector according to any one of claims 1 to 9 , wherein the core wire gripping portion is integrally formed with the cord fixing portion. .

  According to this optical connector, since the core wire gripping part is formed integrally with the cord fixing part, an increase in the number of parts can be suppressed.

An optical connector according to an eleventh aspect is the optical connector according to the first aspect, wherein the core wire gripping part is configured separately from the cord fixing part.

  According to this optical connector, the protruding portion can be gripped by the core wire gripping portion by attaching the core wire gripping portion configured separately from the cord fixing portion to the cord fixing portion.

  Further, by removing the core wire gripping portion from the cord fixing portion, it is possible to release the grip of the protruding portion by the core wire gripping portion.

  Further, when the gripping of the protruding portion by the core wire gripping portion is released, the optical fiber core wire returns to a state in which it can move in the longitudinal direction with respect to the sheath and the tensile body, so that the bending of the protruding portion can be eliminated. . Thereby, since it is not necessary to ensure the space for accommodating the bending of a protrusion part in an optical connector, size reduction of an optical connector can be achieved.

The optical connector according to claim 12 is the optical connector according to claim 1, wherein the core wire gripping portion extends from the cord fixing portion toward the fiber fixing portion, and the protruding portion is elastically deformed. And a plurality of elastic pieces for holding the elastic pieces, and attached to the plurality of elastic pieces to further bring the plurality of elastic pieces into the elastically deformed state.

  According to this optical connector, when the grip assisting member is attached to the plurality of elastic pieces, the plurality of elastic pieces are elastically deformed, whereby the projecting portion can be gripped by the plurality of elastic pieces.

  Further, when the grip assisting member is removed from the plurality of elastic pieces, the plurality of elastic pieces are restored to the original shape, so that the gripping of the protruding portion by the plurality of elastic pieces can be released.

  Further, when the gripping of the protruding portion by the plurality of elastic pieces is released, the optical fiber core wire returns to a state in which it can move in the longitudinal direction with respect to the sheath and the tensile body, so that the bending of the protruding portion can be eliminated. . Thereby, since it is not necessary to ensure the space for accommodating the bending of a protrusion part in an optical connector, size reduction of an optical connector can be achieved.

An optical connector according to a thirteenth aspect is the optical connector according to any one of the first to twelfth aspects, further comprising a housing main body that accommodates at least the fiber fixing portion, A housing is further provided for holding the cord fixing portion with respect to the housing body in a state in which the grip of the protruding portion is released.

  According to this optical connector, the cord fixing portion can be held with respect to the housing body in a state where the gripping of the protruding portion by the core wire gripping portion is released. Thereby, disconnection of the optical fiber cord from the optical connector can be suppressed.

In order to solve the above problem, an optical connector assembling method according to claim 14 is provided with a ferrule having a built-in optical fiber, the ferrule being integrated with the ferrule, and the built-in optical fiber being inserted therein. A fiber fixing portion; a cord fixing portion configured separately from the ferrule and the fiber fixing portion; and a light provided integrally with the cord fixing portion and protruding from an end portion of the sheath of the optical fiber cord and the strength member an optical connector assembling method for mounting a core wire gripper for gripping the protruding portion of the fiber, the optical connector with the optical fiber cord, the projecting portion to the sheath and the strength member On the other hand, in a state in which the protrusion is held in the longitudinal direction so as to be immovable, the protrusion is abutted with the built-in optical fiber inside the fiber fixing portion, and the protrusion In this state, the protruding portion and the built-in optical fiber are fixed to each other by the fiber fixing portion. In the method of releasing the grip of the protrusion by the release portion for releasing the grip of the protrusion by the core wire gripping portion after the protrusion and the built-in optical fiber are fixed by the fiber fixing portion. is there.

  According to this method of assembling an optical connector, even in a so-called loose optical fiber cord, the protruding portion of the optical fiber core wire is held immovably in the longitudinal direction with respect to the sheath and the tensile body. When inserting into the inside of the fiber fixing portion, it is possible to prevent the protruding portion from being pushed back into the sheath, and to reliably abut the protruding portion against the built-in optical fiber.

  According to this optical connector assembling method, when the grasping of the protruding portion is released, the optical fiber core wire returns to a state in which it can move in the longitudinal direction with respect to the sheath and the strength member, so that the bending of the protruding portion can be eliminated. it can. Thereby, since it is not necessary to ensure the space for accommodating the bending of a protrusion part in an optical connector, size reduction of an optical connector can be achieved.

  As described above in detail, according to the first aspect of the present invention, even when a so-called loose optical fiber cord is used, the protrusion of the optical fiber core wire is inserted into the fiber fixing portion. The protrusion can be reliably abutted against the built-in optical fiber by suppressing the portion from being pushed back into the sheath.

  In addition, according to the second aspect of the present invention, it is not necessary to secure a space in the optical connector for accommodating the bending of the protruding portion, so that the optical connector can be reduced in size.

It is a side view including the partial cross section of the optical connector which concerns on 1st embodiment of this invention, Comprising: It is a figure which shows the state in the middle of the assembly of an optical connector. It is a figure which shows the state after the assembly of the optical connector shown by FIG. 1A. It is sectional drawing of the optical fiber cord shown by FIG. 1A and FIG. 1B. It is a side view including the partial cross section of the optical connector which concerns on 2nd embodiment of this invention, Comprising: It is a figure which shows the state in the middle of the assembly of an optical connector. It is a figure which shows the state after the assembly of the optical connector shown by FIG. 3A. It is a side view of the front end side of the optical fiber cord shown in FIGS. 3A and 3B. It is a side view including the partial cross section of the optical connector which concerns on 3rd embodiment of this invention, Comprising: It is a figure which shows the state in the middle of the assembly of an optical connector. It is a figure which shows the state after the assembly of the optical connector shown by FIG. 5A. It is a principal part expansion perspective view of the optical connector which concerns on the 4th reference example of this invention, It is a figure which shows the state before a holding | maintenance auxiliary member is attached. It is a figure which shows the state after the holding | grip auxiliary | assistance member shown by FIG. 6A was attached. It is a principal part enlarged side view of the optical connector which concerns on 5th embodiment of this invention. It is a figure which shows the state after the assembly of the optical connector which concerns on 5th embodiment of this invention. It is a principal part expansion perspective view of the optical connector which concerns on the 6th reference example of this invention, Comprising: It is a figure which shows the state before a core wire holding member is attached. It is a figure which shows the state after the core wire holding member shown by FIG. 9A was attached. It is a principal part expansion perspective view of the optical connector which concerns on the 7th reference example of this invention, Comprising: It is a figure which shows the state in which the jig | tool was attached. It is a principal part enlarged view of FIG.

[First embodiment]
First, a first embodiment of the present invention will be described.

  As shown in FIGS. 1A and 1B, the optical connector 10 according to the first embodiment of the present invention is attached to an optical fiber cord 70 described later, and includes a plug 12, a cord fixing member 14, and a housing 16. And as a main component.

  The plug 12 includes a ferrule 18 and a fiber fixing portion 20. The ferrule 18 has a built-in optical fiber 22 and is integrally provided on a substrate 24 of a fiber fixing unit 20 described later.

  The fiber fixing portion 20 is a so-called mechanical splice method, and includes a substrate 24, a pair of lids 26 and 28, and a pressing member 30. A groove 32 is formed in the surface portion of the substrate 24 along the axial direction of the optical connector 10, and the rear end side of the built-in optical fiber 22 is inserted into the groove 32.

  The pair of lids 26 and 28 are arranged side by side in the longitudinal direction of the groove 32, and each has a size and shape that covers the surface portion of the substrate 24 in which the groove 32 is formed. The pair of lids 26 and 28 are pressed against the substrate 24 by the pressing member 30.

  In this optical connector 10, a recess (not shown) into which a wedge that is provided as an integral part of the optical connector 10 or is a separate jig can be inserted is a substrate 24 and a pair of lids 26, 28. Is formed. The pair of lids 26 and 28 can be separated from the substrate 24 by inserting a wedge into the recess.

  The cord fixing member 14 is configured separately from the plug 12 and the housing 16, and includes a cord fixing portion 34 and a core wire gripping portion 36. The cord fixing portion 34 is configured in a cylindrical shape, and is fixed to at least one end side of a sheath 74 and a strength member 76 constituting an optical fiber cord 70 described later, for example, by caulking or bonding.

  The core wire gripping portion 36 has a pair of arm pieces 38 as main body portions. The pair of arm pieces 38 are disposed on both sides in the radial direction with respect to a protruding portion 72A of an optical fiber core wire 72 to be described later, and extend from the cord fixing portion 34 toward the fiber fixing portion 20, respectively.

  Further, a claw portion 40 is formed on the tip side of each arm piece 38. Each claw portion 40 is formed from the distal end side of each arm piece 38 toward the protruding portion 72A, and is configured to be able to grip the protruding portion 72A.

  In this core wire gripping portion 36, the pair of claw portions 40 grips the protruding portion 72A with the elastic deformation of the pair of arm pieces 38.

  The housing 16 has a hollow housing main body 46 configured to have a front side wall portion 42 and a rear side wall portion 44 that face each other in the axial direction of the optical connector 10. A front hole portion 48 is formed in the front side wall portion 42, and a tapered rear hole portion 50 whose diameter is increased toward the rear side of the optical connector 10 is formed in the rear side wall portion 44.

  The housing main body 46 accommodates the above-described fiber fixing portion 20, and the ferrule 18 provided integrally with the fiber fixing portion 20 protrudes to the outside through the front hole 48. Further, the above-described substrate 24 and lid 28 are formed with an enlarged diameter portion 52, and a spring 54 is accommodated in a compressed state between the enlarged diameter portion 52 and the rear side wall portion 44. The plug 12 is biased toward the distal end side of the optical connector 10 by the spring 54.

  Further, a pair of extending portions 56 as release portions are formed on the rear side wall portion 44 described above. The pair of extending portions 56 are provided between the pair of claw portions 40 and the fiber fixing portion 20, and extend from the rear side wall portion 44 toward the pair of claw portions 40, respectively.

  Further, the housing 16 described above has an extension portion 58 and a movable portion 60. The extension portion 58 extends along the axial direction from the rear side wall portion 44 toward the rear side of the optical connector 10, and the movable portion 60 is provided to face the extension portion 58 in the radial direction of the optical connector 10. It has been.

  The movable portion 60 has a distal end side connected to the housing body 46 so as to be pivotable. As shown in FIG. 1A, the movable portion 60 is pivoted with respect to the housing body 46 and separated from the cord fixing member 14. As shown in FIG. 1B, the optical connector 10 is arranged along the axial direction so as to be in a closed state where the optical connector 10 is in contact with the cord fixing member 14. Further, a retaining portion 62 for preventing the cord fixing member 14 from coming off is formed on the rear end side of the movable portion 60 toward the extension portion 58.

  In the optical connector 10, as shown in FIG. 1B, in a state where the cord fixing member 14 is assembled to the housing 16, the pair of extending portions 56 are brought into contact with the pair of claw portions 40, respectively. The claw portion 40 is elastically deformed toward the cord fixing portion 34 with the connecting portion with each arm piece 38 as a fulcrum, whereby the grip of the protruding portion 72A by the pair of claw portions 40 is released.

  In the optical connector 10, in the state shown in FIG. 1B described above, the pair of extending portions 56 and the retaining portions 62 restrict the movement of the cord fixing member 14 in the axial direction of the optical connector 10 and The portion 58 and the movable portion 60 are configured to restrict the movement of the cord fixing member 14 in the radial direction of the optical connector 10.

  Note that the housing 16 is provided with a lock portion (not shown), and the movable portion 60 can be held in a closed state by the lock portion.

  As shown in FIG. 2, the optical fiber cord 70 includes an optical fiber core wire 72, a sheath 74 that accommodates the optical fiber core wire 72, and a strength member 76 provided between the optical fiber core wire 72 and the sheath 74. And have. The optical fiber cord 70 is a so-called loose optical fiber cord 70 in which the optical fiber core wire 72 is movable in the longitudinal direction with respect to the sheath 74 and the strength member 76.

  Further, as shown in FIGS. 1A and 1B, at the distal end side of the optical fiber cord 70, the above-described sheath 74 and the strength member 76 are cut off, so that the optical fiber core is formed from the ends of the sheath 74 and the strength member 76. A part of the line 72 protrudes as a protrusion 72A.

  Next, the operation and effect will be described together with the method of assembling the optical connector 10 having the above configuration.

  First, as shown in FIG. 1A, the cord fixing portion 34 is fixed to at least one end side of the sheath 74 and the strength member 76, the cord fixing member 14 is attached to the optical fiber cord 70, and the optical fiber core is attached. The protrusion 72A of the line 72 is gripped by the pair of claws 40. Further, the movable portion 60 is opened, and a pair of lids 26, 28 are separated from the substrate 24 by inserting a wedge into a recess formed in the substrate 24 and the pair of lids 26, 28.

  Subsequently, the cord fixing member 14 enters between the extension portion 58 and the movable portion 60 and approaches the fiber fixing portion 20, and the protruding portion 72A gripped by the pair of claws 40 is fixed to the rear hole portion 50 and the fiber fixing portion. It inserts in the inside (groove 32) of the part 20 one by one.

  Then, the protruding portion 72A is abutted against the built-in optical fiber 22 inside the fiber fixing portion 20, and the relative position of the pair of claw portions 40 (cord fixing members 14) with respect to the fiber fixing portion 20 is adjusted. A bend 78 is generated in a part of the protruding portion 72A between the portion 40 and the fiber fixing portion 20, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed.

  Subsequently, in this state, the above-mentioned wedge is removed, and the protruding portion 72A and the built-in optical fiber 22 which are abutted with each other are sandwiched and fixed by the substrate 24 and the pair of lids 26 and 28.

  Thereafter, as shown in FIG. 1B, the cord fixing member 14 is brought close to the fiber fixing portion 20, and the pair of extending portions 56 are brought into contact with each of the pair of claw portions 40, and the cord is fixed from this state. The member 14 is further brought closer to the fiber fixing portion 20. As a result, each claw portion 40 is deformed toward the cord fixing portion 34 with the connecting portion with each arm piece 38 as a fulcrum, and the gripping of the protruding portion 72A by the pair of claw portions 40 is released.

  Subsequently, the movable portion 60 is closed. Thus, the movement of the cord fixing member 14 in the axial direction of the optical connector 10 is restricted by the pair of extending portions 56 and the retaining portion 62, and the optical connector 10 of the cord fixing member 14 by the extension portion 58 and the movable portion 60. The movement in the radial direction is restricted. That is, the cord fixing member 14 is held with respect to the housing body 46. And the optical connector 10 is attached to the optical fiber cord 70 by the above procedure.

  As described above, according to the optical connector 10, even in the so-called loose optical fiber cord 70, the protruding portion 72A is gripped by the core wire gripping portion 36 formed integrally with the cord fixing portion 34. The optical fiber core wire 72 having the projecting portion 72A cannot be moved in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the gripping of the protruding portion 72A by the core wire gripping portion 36 is released, the optical fiber core wire 72 returns to a state in which it can move in the longitudinal direction with respect to the sheath 74 and the strength member 76, so that the protrusion 72A bends. 78 can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 10, size reduction of the optical connector 10 can be achieved.

  Moreover, the gripping of the protruding portion 72A by the core wire gripping portion 36 is released by a simple operation by simply bringing the cord fixing member 14 closer to the fiber fixing portion 20 (just pushing the cord fixing member 14 toward the fiber fixing portion 20). be able to.

  Furthermore, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Further, since the core wire gripping part 36 is integrally formed with the cord fixing part 34, an increase in the number of parts can be suppressed.

  Further, in a state where the gripping of the protruding portion 72A by the core wire gripping portion 36 is released, the cord fixing member 14 is sandwiched between the pair of extending portions 56, the retaining portion 62, the extending portion 58, and the movable portion 60. The cord fixing member 14 can be held with respect to the housing body 46. Thereby, disconnection, rattling, and the like of the optical fiber cord 70 from the optical connector 10 can be suppressed.

  In this optical connector 10, the core wire gripping portion 36 is configured to include a pair of arm pieces 38 and claw portions 40, but is configured to include three or more arm pieces 38 and claw portions 40. May be.

  Further, the core wire gripping portion 36 is configured to have a pair of arm pieces 38. For example, instead of the pair of arm pieces 38, it extends from the cord fixing portion 34 toward the fiber fixing portion 20. A plurality of claw portions 40 may be formed on the distal end side of the main body portion. In this case, the plurality of claw portions 40 may be configured to grip the protruding portion 72A with elastic deformation.

  Moreover, although the movable part 60 was supported by the housing main body 46 so that rotation was possible, you may be supported by the housing main body 46 so that a slide and an attachment attitude | position can be changed besides this, for example.

  Further, the core wire gripping portion 36 is formed integrally with the cord fixing portion 34, but may be configured separately from the cord fixing portion 34 and attached integrally to the cord fixing portion 34.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  The configuration of the optical connector 80 according to the second embodiment of the present invention shown in FIGS. 3A and 3B is changed as follows with respect to the optical connector 10 according to the first embodiment of the present invention described above.

  That is, the housing 16 has a cylindrical accommodating portion 82. The accommodating portion 82 extends from the rear side wall portion 44 toward the rear side of the optical connector 80 along the axial direction, and is configured to accommodate the cord fixing member 14. Further, the accommodation portion 82 is formed with a pair of escape portions 96 as a release portion.

  On the other hand, the cord fixing member 14 is integrally formed with a core wire gripping portion 86. The core wire gripping portion 86 is composed of a pair of elastic pieces 88 extending from the cord fixing portion 34 toward the fiber fixing portion 20, and each elastic piece 88 holds the protruding portion 72A on the tip side thereof. It has claw part 88A for doing. Further, a projection 92 as a pressing portion is formed at the central portion in the longitudinal direction of each elastic piece 88 toward the inner peripheral surface of the accommodating portion 82.

  In the optical connector 80, as shown in FIG. 4, in a state where the cord fixing member 14 is not accommodated in the accommodating portion 82 (a state where no pressing force is applied to each elastic piece 88), a pair of elastic members The piece 88 (a pair of claw portions 88A) is configured to be separated from the protruding portion 72A (not holding the protruding portion 72A).

  Further, in this optical connector 80, as shown in FIG. 3A, when the cord fixing member 14 is accommodated in the accommodating portion 82, a pair of projections 92 positioned between the elastic pieces 88 and the accommodating portion 82 are used. The elastic pieces 88 are pressed toward each other and elastically deformed, whereby the protrusion 72A is gripped by the pair of elastic pieces 88.

  Further, in this optical connector 80, as shown in FIG. 3B, when the cord fixing member 14 is further brought closer to the fiber fixing portion 20 from the state shown in FIG. 3A, the protrusion 92 enters the escape portion 96. Thus, the pressed state of the pair of elastic pieces 88 is released, whereby the pair of elastic pieces 88 is restored to the original shape, and the grip of the protruding portion 72A by the pair of elastic pieces 88 is released. ing.

  Further, in the optical connector 80, in the state shown in FIG. 3B described above, the protrusion 92 is engaged with the escape portion 96, thereby restricting the movement of the cord fixing member 14 in the axial direction of the optical connector 80. At the same time, the cord fixing member 14 is accommodated in the accommodating portion 82 so that the movement of the cord fixing member 14 in the radial direction of the optical connector 80 is restricted.

  Next, the operation and effect will be described together with the method of assembling the optical connector 80 having the above configuration.

  First, as shown in FIG. 4, the cord fixing member 14 is integrally attached to the optical fiber cord 70. Then, as shown in FIG. 3A, the cord fixing member 14 is accommodated in the accommodating portion 82. Accordingly, the pair of elastic pieces 88 are pressed and elastically deformed by the protrusions 92 positioned between the elastic pieces 88 and the accommodating portion 82, and the protrusions 72 </ b> A are formed by the pair of elastic pieces 88. Is gripped.

  Similarly to the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, and the protruding portion 72A is butted against the built-in optical fiber 22, and a part of the protruding portion 72A is inserted. Then, a bend 78 is generated, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. In this state, the wedge is removed, and the protruding portion 72 </ b> A and the built-in optical fiber 22 are fixed to each other by the fiber fixing portion 20.

  After that, as shown in FIG. 3B, the cord fixing member 14 is brought close to the fiber fixing portion 20. Thereby, when the protrusion 92 enters the escape portion 96, the pressed state of the pair of elastic pieces 88 is released. Then, when the pair of elastic pieces 88 is restored to the original shape, the gripping of the protruding portion 72A by the pair of elastic pieces 88 is released.

  At this time, the protrusion 92 is engaged with the escape portion 96, so that the movement of the cord fixing member 14 in the axial direction of the optical connector 80 is restricted and the cord fixing member 14 is accommodated in the accommodating portion 82. This restricts the movement of the cord fixing member 14 in the radial direction of the optical connector 80. That is, the cord fixing member 14 is held with respect to the housing body 46. Then, the optical connector 80 is attached to the optical fiber cord 70 in the manner described above.

  Thus, according to this optical connector 80, even in the so-called loose optical fiber cord 70, the protruding portion 72A is gripped by the pair of elastic pieces 88 formed integrally with the cord fixing portion 34. The optical fiber core wire 72 having the projecting portion 72A cannot be moved in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the gripping of the protruding portion 72A by the pair of elastic pieces 88 is released, the optical fiber core wire 72 returns to a state in which the optical fiber core wire 72 can move in the longitudinal direction with respect to the sheath 74 and the strength member 76. 78 can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 80, size reduction of the optical connector 80 can be achieved.

  In addition, the gripping of the protruding portion 72A by the pair of elastic pieces 88 is released by a simple operation by simply bringing the cord fixing member 14 closer to the fiber fixing portion 20 (just pushing the cord fixing member 14 toward the fiber fixing portion 20). be able to.

  Furthermore, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Moreover, since the core wire gripping part 86 having the pair of elastic pieces 88 is formed integrally with the cord fixing part 34, an increase in the number of parts can be suppressed.

  Further, in a state where the gripping of the protruding portion 72A by the pair of elastic pieces 88 is released, the projection 92 is engaged with the escape portion 96 and the cord fixing member 14 is accommodated in the accommodating portion 82, whereby the cord is fixed. The member 14 can be held against the housing body 46. Thereby, disconnection, rattling, and the like of the optical fiber cord 70 from the optical connector 10 can be suppressed.

  In this optical connector 80, the core wire gripping portion 86 is constituted by a pair of elastic pieces 88, but may be constituted by three or more elastic pieces.

  Further, the protrusion 92 is formed on the elastic piece 88 and the escape portion 96 is formed on the accommodation portion 82. However, the protrusion 92 is formed on the accommodation portion 82, and the escape portion 96 is formed on the elastic piece 88. May be.

  In addition, the escape portion 96 is configured by a hole that penetrates the accommodation portion 82, but may be configured by a recess that opens on the inner peripheral surface of the accommodation portion 82.

  Further, the core wire gripping portion 86 is formed integrally with the cord fixing portion 34, but may be configured separately from the cord fixing portion 34 and attached integrally to the cord fixing portion 34.

[Third embodiment]
Next, a third embodiment of the present invention will be described.

  The optical connector 100 according to the third embodiment of the present invention shown in FIGS. 5A and 5B has the following configuration with respect to the optical connector 10 according to the first embodiment of the present invention described above.

  That is, the cord fixing member 14 is integrally formed with the core wire gripping portion 106. The core wire gripping portion 106 has a pair of arm pieces 108 and 109 extending from the cord fixing portion 34 toward the fiber fixing portion 20, and each arm piece 108 and 109 protrudes to the distal end side thereof. Claw portions 108A and 109A for gripping the portion 72A are provided. In addition, an engaged portion 112 is integrally formed toward the fiber fixing portion 20 on the distal end side of the other arm piece 109 located on the opposite side to the movable portion 60 of the pair of arm pieces 108 and 109. Yes.

  On the other hand, the movable portion 60 is formed with an engaging portion 116 as a releasing portion that protrudes toward the inside of the optical connector 100.

  In the optical connector 100, as shown in FIG. 5A, when the movable portion 60 is in the open state, the engaging portion 116 is not disengaged even when the cord fixing member 14 is disposed on the extension portion 58. The rotation angle of the movable part 60, the length of the engaging part 116, and the like are set so as to be separated from the engaged part 112.

  Further, in this optical connector 100, as shown in FIG. 5B, when the movable portion 60 is rotated from the open state to the closed state, the engaged portion 112 is engaged with the rotation of the movable portion 60. As a result, the other arm piece 109 formed with the engaged portion 112 is elastically deformed toward the separated side with respect to the one arm piece 108, so that the pair of engagement portions 116 is integrally displaced. The gripping of the protrusion 72A by the arm pieces 108 and 109 is released.

  Further, in this optical connector 100, in the state shown in FIG. 5B described above, the engaging portion 116 is pressed against the engaged portion 112 and the other arm piece 109 is elastically deformed, whereby the fiber of the cord fixing member 14 is The movement on the fixed portion 20 side is restricted, the movement on the separation side of the cord fixing member 14 with respect to the fiber fixing portion 20 is restricted by the retaining portion 62, and the light of the cord fixing member 14 by the extension portion 58 and the movable portion 60. It is set as the structure by which the movement to the radial direction of the connector 100 is controlled.

  Next, the operation and effect will be described together with the method of assembling the optical connector 100 having the above configuration.

  First, as shown in FIG. 5A, the cord fixing member 14 is integrally attached to the optical fiber cord 70, and the protruding portion 72 </ b> A of the optical fiber core wire 72 is held by the pair of arm pieces 108 and 109. Moreover, the movable part 60 is made into an open state.

  Subsequently, as in the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, the protruding portion 72A is butted against the built-in optical fiber 22, and one of the protruding portions 72A is inserted. A bend 78 is generated in the portion, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. In this state, the wedge is removed, and the protruding portion 72 </ b> A and the built-in optical fiber 22 are fixed to each other by the fiber fixing portion 20.

  Thereafter, as shown in FIG. 5B, the movable portion 60 is rotated from the open state to the closed state. As a result, the engaged portion 112 is integrally displaced with the engaging portion 116 as the movable portion 60 rotates, and the other arm piece 109 formed with the engaged portion 112 is moved to one side. The arm piece 108 is deformed to the separated side. Then, the other arm piece 109 is separated from the projecting portion 72A with elastic deformation, thereby releasing the grip of the projecting portion 72A by the pair of arm pieces 108 and 109.

  Subsequently, the movable portion 60 is closed. As a result, movement of the cord fixing member 14 on the side away from the fiber fixing portion 20 is restricted by the retaining portion 62, and movement of the cord fixing member 14 in the radial direction of the optical connector 100 by the extension portion 58 and the movable portion 60. Be regulated. At this time, the engagement portion 116 is pressed against the engaged portion 112 and the other arm piece 109 is elastically deformed, whereby the movement of the cord fixing member 14 on the fiber fixing portion 20 side is restricted. That is, the cord fixing member 14 is held with respect to the housing body 46. Then, the optical connector 100 is attached to the optical fiber cord 70 in the manner described above.

  As described above, according to the optical connector 100, even in the so-called loose optical fiber cord 70, the protruding portion 72A is gripped by the pair of arm pieces 108 and 109 formed integrally with the cord fixing portion 34. Thus, the optical fiber core wire 72 having the projecting portion 72A can be made immovable in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  When the gripping of the protruding portion 72A by the pair of arm pieces 108 and 109 is released, the optical fiber core wire 72 returns to a state in which the optical fiber core wire 72 can move in the longitudinal direction with respect to the sheath 74 and the tensile strength body 76. Can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 100, size reduction of the optical connector 100 can be achieved.

  In addition, the grip of the protruding portion 72A by the pair of arm pieces 108 and 109 can be released by a simple operation by simply moving the movable portion 60 from the open state to the closed state.

  Furthermore, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Moreover, since the core wire gripping part 106 having the pair of arm pieces 108 and 109 is formed integrally with the cord fixing part 34, an increase in the number of parts can be suppressed.

  Further, in a state where the gripping of the protruding portion 72A by the pair of arm pieces 108 and 109 is released, the engaging portion 116 is pressed against the engaged portion 112, the other arm piece 109 is elastically deformed, and the cord is fixed. When the member 14 is sandwiched between the retaining portion 62, the extension portion 58, and the movable portion 60, the cord fixing member 14 can be held with respect to the housing body 46. Thereby, disconnection, rattling, and the like of the optical fiber cord 70 from the optical connector 10 can be suppressed.

  In this optical connector 100, the core wire gripping portion 106 is configured to include a pair of arm pieces 108 and 109, but may be configured to include three or more arm pieces.

  Further, although the core wire gripping portion 106 is formed integrally with the cord fixing portion 34, it may be configured separately from the cord fixing portion 34 and attached integrally to the cord fixing portion 34.

[ Fourth Reference Example ]
Next, a fourth reference example of the present invention will be described.

The optical connector 120 according to the fourth reference example of the present invention shown in FIGS. 6A and 6B has a configuration changed as follows with respect to the optical connector 10 according to the first embodiment of the present invention described above.

  The configurations other than the cord fixing member 14 shown in FIGS. 6A and 6B are the same as those in the first embodiment of the present invention described above. FIGS. 1A and 1B are referred to for the same configuration. We will refer to it.

  That is, the cord fixing member 14 is integrally formed with the core wire gripping portion 126. The core wire gripping portion 126 is constituted by a pair of elastic pieces 128 extending from the cord fixing portion 34 toward the fiber fixing portion 20, and each elastic piece 128 holds the protruding portion 72A on the tip side thereof. It has a claw portion 128A for doing this.

  Further, the optical connector 120 is provided with a grip assisting member 132. The grip assisting member 132 is formed in a gate shape and is configured to be attachable to a pair of elastic pieces 128.

  In the optical connector 120, as shown in FIG. 6A, in a state where the grip assisting member 132 is not attached to the pair of elastic pieces 128, the pair of elastic pieces 128 (the pair of claw portions 128A) is the protruding portion 72A. It is set as the structure spaced apart from (it does not hold | grip the protrusion part 72A).

  Further, in this optical connector 120, as shown in FIG. 6B, when the gripping auxiliary member 132 is attached to the pair of elastic pieces 128, the pair of elastic pieces 128 are elastically moved toward the side where the pair of elastic pieces 128 approach each other. Thus, the protrusion 72A is gripped by the pair of elastic pieces 128.

  Further, in this optical connector 120, even when the cord fixing member 14 is disposed on the extension portion 58, when the movable portion 60 is in the open state (see FIG. 1A), the optical connector 120 is grasped from the pair of elastic pieces 128. The auxiliary member 132 can be removed.

  Next, the operation and effect of the optical connector 120 having the above configuration will be described together with the assembling method.

  First, as shown in FIG. 6A, the cord fixing member 14 is integrally attached to the optical fiber cord 70. Subsequently, as shown in FIG. 6B, the grip assisting member 132 is attached to the pair of elastic pieces 128. As a result, the pair of elastic pieces 128 are elastically deformed toward the side approaching each other by the grip assisting member 132, and the projecting portion 72 </ b> A is gripped by the pair of elastic pieces 128. Moreover, the movable part 60 is made into an open state (refer FIG. 1A).

  Subsequently, as in the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, the protruding portion 72A is butted against the built-in optical fiber 22, and one of the protruding portions 72A is inserted. A bend 78 is generated in the portion, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. In this state, the wedge is removed, and the protruding portion 72A and the built-in optical fiber 22 that are abutted with each other are fixed by the fiber fixing portion 20 (see FIG. 1A).

  Then, as shown in FIG. 6A, the grip assisting member 132 is removed from the pair of elastic pieces 128. As a result, the pair of elastic pieces 128 is restored to the original shape, and thus the gripping of the protrusion 72A by the pair of elastic pieces 128 is released.

  Subsequently, the movable unit 60 is closed (see FIG. 1B). Thereby, the movement of the cord fixing member 14 in the axial direction of the optical connector is restricted by the retaining portion 62, and the movement of the cord fixing member 14 in the radial direction of the optical connector is restricted by the extension portion 58 and the movable portion 60. The At this time, the movement of the cord fixing member 14 in the axial direction with respect to the housing main body 46 is restricted by a restriction portion (not shown) or the like. That is, the cord fixing member 14 is held with respect to the housing body 46. And the optical connector 120 of this embodiment is attached to the optical fiber cord 70 by the above point.

  As described above, according to the optical connector 120, even in the so-called loose optical fiber cord 70, the protruding portion 72A is gripped by the pair of elastic pieces 128 formed integrally with the cord fixing portion 34. The optical fiber core wire 72 having the projecting portion 72A cannot be moved in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the gripping of the protruding portion 72A by the pair of elastic pieces 128 is released, the optical fiber core wire 72 returns to a state in which the optical fiber core wire 72 can move in the longitudinal direction with respect to the sheath 74 and the tensile strength body 76. 78 can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 120, size reduction of the optical connector 120 can be achieved.

  In addition, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Further, the auxiliary gripping member 132 removed from the pair of elastic pieces 128 can be reused (reused) for another optical connector 120 as necessary.

  In the optical connector 120, the core wire gripping portion 126 is configured by the pair of elastic pieces 128, but may be configured by three or more elastic pieces.

  Further, the core wire gripping portion 126 is formed integrally with the cord fixing portion 34, but may be configured separately from the cord fixing portion 34 and attached integrally to the cord fixing portion 34.

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described.

  The optical connector 140 according to the fifth embodiment of the present invention shown in FIG. 7 and FIG. 8 is modified as follows with respect to the optical connector 140 according to the first embodiment of the present invention described above.

  That is, the cord fixing member 14 is integrally formed with a core wire gripping part 146 as shown in FIG. The core wire gripping part 146 has a pair of arm pieces 148 and 149, and each arm piece 148 and 149 extends from the cord fixing part 34 toward the fiber fixing part 20.

  One claw portion 150 </ b> A is formed toward the other arm piece 149 at the longitudinal center portion of one arm piece 148. On the other hand, the other arm piece 149 is formed with a pair of claw portions 150B and 150C toward the one arm piece 148 so as to be alternated with the above-described claw portion 150A. Further, one arm piece 148 is formed longer than the other arm piece 149, and a tip end portion of the one arm piece 148 is a sliding contact portion 152.

  On the other hand, as shown in FIG. 8, the rear side wall portion 44 is formed with a sliding contact portion 156 as a release portion protruding toward the one arm piece 148. In addition, an inclined surface 156 A that is inclined with respect to the axial direction of the optical connector 140 is formed at the tip of the sliding contact portion 156.

  In this optical connector 140, when the cord fixing member 14 is approached to the fiber fixing portion 20 in a state where the cord fixing member 14 is disposed between the extension portion 58 and the movable portion 60, as shown in FIG. The distal end side of 152 is slidably contacted with the inclined surface 156A of the sliding contact portion 156, whereby one arm piece 148 is elastically deformed toward the separated side with respect to the other arm piece 149, and a plurality of claw portions 150A, 150B. , 150C, the gripping of the protruding portion 72A is released.

  Further, in this optical connector 140, in the state shown in FIG. 8 described above, the sliding contact portion 152 is pressed against the sliding contact portion 156 and one arm piece 148 is elastically deformed, whereby the fiber of the cord fixing member 14 is The movement on the fixed portion 20 side is restricted, the movement on the separation side of the cord fixing member 14 with respect to the fiber fixing portion 20 is restricted by the retaining portion 62, and the light of the cord fixing member 14 by the extension portion 58 and the movable portion 60. The connector 140 is configured to be restricted from moving in the radial direction.

  Next, the operation and effect will be described together with the method of assembling the optical connector 140 having the above configuration.

  First, as shown in FIG. 7, the cord fixing member 14 is integrally attached to the optical fiber cord 70, and the protruding portion 72A of the optical fiber core wire 72 is gripped by a plurality of claw portions 150A, 150B, and 150C. Moreover, the movable part 60 is made into an open state (refer FIG. 1A).

  Subsequently, as in the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, the protruding portion 72A is butted against the built-in optical fiber 22, and one of the protruding portions 72A is inserted. A bend 78 is generated in the portion, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. In this state, the wedge is removed, and the protruding portion 72 </ b> A and the built-in optical fiber 22 are fixed to each other by the fiber fixing portion 20.

  Then, as shown in FIG. 8, the cord fixing member 14 is brought close to the fiber fixing portion 20, and the tip end side of the sliding contact portion 152 is brought into contact with the inclined surface 156A of the sliding contact portion 156. Then, the cord fixing member 14 is further brought closer to the fiber fixing portion 20. As a result, the tip end side of the sliding contact portion 152 is brought into sliding contact with the inclined surface 156A of the sliding contact portion 156, whereby one arm piece 148 is elastically deformed away from the other arm piece 149, thereby The gripping of the protruding portion 72A by the claw portions 150A, 150B, and 150C is released.

  Subsequently, the movable portion 60 is closed. As a result, movement of the cord fixing member 14 on the side away from the fiber fixing portion 20 is restricted by the retaining portion 62, and movement of the cord fixing member 14 in the radial direction of the optical connector 140 by the extension portion 58 and the movable portion 60. Be regulated. At this time, the sliding contact portion 152 is pressed against the sliding contact portion 156 and the one arm piece 148 is elastically deformed, whereby the movement of the cord fixing member 14 on the fiber fixing portion 20 side is restricted. That is, the cord fixing member 14 is held with respect to the housing body 46. Then, the optical connector 140 is attached to the optical fiber cord 70 in the manner described above.

  Thus, according to this optical connector 140, even in the so-called loose optical fiber cord 70, the protruding portion 72A is gripped by the core wire gripping portion 146 formed integrally with the cord fixing portion 34. The optical fiber core wire 72 having the projecting portion 72A cannot be moved in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the gripping of the protruding portion 72A by the core wire gripping portion 146 is released, the optical fiber core wire 72 returns to a state in which it can move in the longitudinal direction with respect to the sheath 74 and the tensile strength body 76. 78 can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 140, size reduction of the optical connector 140 can be achieved.

  In addition, the gripping of the protruding portion 72A by the core wire gripping portion 146 is released by a simple operation only by bringing the cord fixing member 14 closer to the fiber fixing portion 20 (just pushing the cord fixing member 14 toward the fiber fixing portion 20). be able to.

  Furthermore, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Further, since the core wire gripping part 146 is integrally formed with the cord fixing part 34, an increase in the number of parts can be suppressed.

  Further, in a state where the gripping of the protruding portion 72A by the plurality of claw portions 150A, 150B, and 150C is released, the sliding contact portion 152 is pressed against the sliding contact portion 156, and one arm piece 148 is elastically deformed. When the cord fixing member 14 is sandwiched between the retaining portion 62, the extension portion 58, and the movable portion 60, the cord fixing member 14 can be held with respect to the housing body 46. Thereby, disconnection, rattling, and the like of the optical fiber cord 70 from the optical connector 10 can be suppressed.

  The plurality of claw portions 150A, 150B, and 150C are alternately arranged, and the plurality of claw portions 150A, 150B, and 150C can grip the protruding portion 72A in a slightly bent state. Thereby, even if the gripping force (elastic force of the arm pieces 148, 149) of the plurality of claw portions 150A, 150B, 150C is weak, the protruding portion 72A can be sufficiently held, and thus the breakage of the protruding portion 72A is suppressed. be able to.

  In this optical connector 140, the core wire gripping part 146 is configured to include a pair of arm pieces 148 and 149, but may be configured to include three or more arm pieces. In addition, four or more claw portions may be provided.

  Further, although the sliding contact portion 152 is formed on the one arm piece 148, for example, it may be formed on the claw portion 150A of the one arm piece 148.

  Further, the core wire gripping part 146 is formed integrally with the cord fixing part 34, but may be configured separately from the cord fixing part 34 and attached integrally to the cord fixing part 34.

[ Sixth Reference Example ]
Next, a sixth reference example of the present invention will be described.

The optical connector 160 according to the sixth reference example of the present invention shown in FIG. 9A and FIG. 9B is modified as follows with respect to the optical connector 10 according to the first embodiment of the present invention described above.

  The configurations other than the cord fixing member 14 shown in FIGS. 9A and 9B are the same as those in the first embodiment of the present invention described above. For the same configuration, FIGS. 1A and 1B are used. We will refer to it.

  That is, the cord fixing member 14 includes a core wire gripping member 166 as a core wire gripping portion and a fitted portion 172 in addition to the cord fixing portion 34 described above.

  The core wire gripping member 166 is configured separately from the cord fixing portion 34 and is formed in a block shape. The core wire gripping member 166 is made of, for example, an elastic material such as rubber, and a knob 168 is formed on the upper surface of the core wire gripping member 166 so as to protrude. Further, the core wire gripping member 166 is configured to be able to be fitted to a fitted portion 172 described later.

  On the other hand, the fitted portion 172 is formed in a concave shape and is formed integrally with the cord fixing portion 34. A gripping protrusion 174 is formed on the bottom surface of the fitted portion 172. The gripping protrusion 174 is formed when the core wire gripping member 166 is fitted to the fitted portion 172. 166 and grip the projecting portion 72A.

  In the optical connector 160, even when the cord fixing member 14 is disposed on the extension portion 58, when the movable portion 60 is in the open state (see FIG. 1A), the core from the fitted portion 172 The wire gripping member 166 can be removed.

  Next, the operation and effect will be described together with the method of assembling the optical connector 160 having the above configuration.

  First, as shown in FIG. 9A, the cord fixing member 14 is integrally attached to the optical fiber cord 70. Subsequently, as shown in FIG. 9B, the core wire gripping member 166 is fitted into the fitted portion 172. Accordingly, the protruding portion 72A is gripped by the core wire gripping member 166 and the gripping protrusion 174. Moreover, the movable part 60 is made into an open state (refer FIG. 1A).

  Subsequently, as in the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, the protruding portion 72A is butted against the built-in optical fiber 22, and one of the protruding portions 72A is inserted. A bend 78 is generated in the portion, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. In this state, the wedge is removed, and the protruding portion 72A and the built-in optical fiber 22 that are abutted with each other are fixed by the fiber fixing portion 20 (see FIG. 1A).

  Then, as shown in FIG. 9A, the core wire gripping member 166 is removed from the fitted portion 172. Thereby, the gripping of the protruding portion 72A is released.

  Subsequently, the movable unit 60 is closed (see FIG. 1B). Thereby, the movement of the cord fixing member 14 in the axial direction of the optical connector is restricted by the retaining portion 62, and the movement of the cord fixing member 14 in the radial direction of the optical connector is restricted by the extension portion 58 and the movable portion 60. The At this time, the movement of the cord fixing member 14 in the axial direction with respect to the housing main body 46 is restricted by a restriction portion (not shown) or the like. That is, the cord fixing member 14 is held with respect to the housing body 46. And the optical connector 160 of this embodiment is attached to the optical fiber cord 70 by the above point.

  As described above, according to the optical connector 160, even if the so-called loose optical fiber cord 70 is used, the core wire gripping member 166 is fitted to the fitted portion 172 formed integrally with the cord fixing portion 34. By gripping the projecting portion 72A, the optical fiber core wire 72 having the projecting portion 72A can be made immovable in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the core wire gripping member 166 is detached from the fitted portion 172 and the grip of the protruding portion 72A is released, the optical fiber core wire 72 is movable in the longitudinal direction with respect to the sheath 74 and the tensile strength body 76. Therefore, the deflection 78 of the protrusion 72A can be eliminated. Thereby, it is not necessary to secure a space in the optical connector 160 for accommodating the deflection 78 of the projecting portion 72A, so that the optical connector 160 can be downsized.

  In addition, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Furthermore, the core wire gripping member 166 removed from the fitted portion 172 can be reused (reused) for another optical connector 160 as necessary.

  Further, since the core wire gripping member 166 is formed of an elastic material such as rubber, it is possible to suppress breakage of the protruding portion 72A.

  The optical connector 160 may be configured such that the gripping protrusion 174 is omitted and the protruding portion 72A is gripped by the core wire gripping member 166 and the bottom surface of the fitted portion 172.

  Further, the core wire gripping member 166 may be provided as an integral part of the optical connector 160 or may be a separate jig.

[ Seventh Reference Example ]
Next, a seventh reference example of the present invention will be described.

The optical connector 180 according to the seventh reference example of the present invention shown in FIGS. 10 and 11 is fixed to the optical connector 160 according to the sixth reference example of the present invention described above, instead of the cord holding member 166. A jig 186 is provided as a core wire gripping part used when the member 14 is inserted into the optical connector 180.

  The configurations other than the cord fixing member 14 and the jig 186 shown in FIGS. 10 and 11 are the same as those in the first embodiment of the present invention described above. Reference is made to FIG. 1B.

  The jig 186 includes an operation part 192 for an operator to operate, an attachment part 190 formed on the distal end side of the operation part 192 and attached to the cord fixing part 34, and a pair formed on the distal end side of the attachment part 190. The elastic piece 188 is provided. The pair of elastic pieces 188 is configured to be able to grip the protruding portion 72A.

  In the optical connector 180, even when the cord fixing member 14 is disposed on the extension portion 58, the jig from the cord fixing member 14 is used when the movable portion 60 is open (see FIG. 1A). 186 can be removed.

  Next, the operation and effect will be described together with the method of assembling the optical connector 180 having the above configuration.

  First, as shown in FIG. 10, the cord fixing member 14 is integrally attached to the optical fiber cord 70. Subsequently, the attachment portion 190 is attached to the cord fixing portion 34 and the jig 186 is attached to the cord fixing member 14 integrally. At this time, the protrusion 72A is held by the pair of elastic pieces 188. Moreover, the movable part 60 is made into an open state (refer FIG. 1A).

  Subsequently, the cord fixing member 14 is inserted into the housing 16 by operating the jig 186. Then, as in the first embodiment of the present invention described above, the protruding portion 72A is inserted into the fiber fixing portion 20, and the protruding portion 72A is butted against the built-in optical fiber 22 and a part of the protruding portion 72A. Then, a bend 78 is generated, and a reliable butted state between the protruding portion 72A and the built-in optical fiber 22 is confirmed. Subsequently, in this state, the wedge is removed, and the protruding portion 72A and the built-in optical fiber 22 that are abutted with each other are fixed by the fiber fixing portion 20 (see FIG. 1A).

  Thereafter, the jig 186 is removed from the cord fixing member 14. Thereby, the gripping of the protruding portion 72A is released.

  Subsequently, the movable unit 60 is closed (see FIG. 1B). Thereby, the movement of the cord fixing member 14 in the axial direction of the optical connector is restricted by the retaining portion 62, and the movement of the cord fixing member 14 in the radial direction of the optical connector is restricted by the extension portion 58 and the movable portion 60. The At this time, the movement of the cord fixing member 14 in the axial direction with respect to the housing main body 46 is restricted by a restriction portion (not shown) or the like. That is, the cord fixing member 14 is held with respect to the housing body 46. And the optical connector 180 of this embodiment is attached to the optical fiber cord 70 by the above point.

  As described above, according to the optical connector 180, even in the so-called loose optical fiber cord 70, the protruding portion 72 </ b> A is gripped by the jig 186 attached integrally to the cord fixing member 14. The optical fiber core wire 72 having 72A can be made immovable in the longitudinal direction with respect to the sheath 74 and the strength member 76. Therefore, when the protrusion 72A is inserted into the fiber fixing part 20, the protrusion 72A is prevented from being pushed back into the sheath 74, and the protrusion 72A can be reliably abutted against the built-in optical fiber 22. it can.

  Further, when the jig 186 is removed from the cord fixing member 14 and the gripping of the protruding portion 72A is released, the optical fiber core wire 72 returns to a state in which it can move in the longitudinal direction with respect to the sheath 74 and the strength member 76. The bending 78 of the protrusion 72A can be eliminated. Thereby, since it is not necessary to ensure the space for accommodating the bending 78 of protrusion part 72A in the optical connector 180, size reduction of the optical connector 180 can be achieved.

  In addition, the occurrence of bending loss or the like of the optical fiber core wire 72 can be suppressed by eliminating the bending 78 of the protrusion 72A.

  Furthermore, the jig 186 removed from the cord fixing member 14 can be reused (reused) for another optical connector 180 as necessary.

  In this optical connector 180, the jig 186 is configured to include a pair of elastic pieces 188, but may be configured to include three or more elastic pieces.

  The jig 186 may be prepared for each optical connector 180 or may be used in common for the plurality of optical connectors 180.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can change and implement variously. Of course.

DESCRIPTION OF SYMBOLS 10 ... Optical connector, 16 ... Housing, 18 ... Ferrule, 20 ... Fiber fixing part, 22 ... Built-in optical fiber, 34 ... Cord fixing part, 36 ... Core wire holding , 38... Arm piece (main body part), 40... Claw part, 46... Housing body, 56... Extension part (release part), 60. Optical fiber cord 72 ... Optical fiber core wire 72A ... Projection part 74 ... Sheath 76 ... Strength member 80 ... Optical connector 82 ... Housing part 86 ... -Core wire gripping part, 88 ... elastic piece, 92 ... projection (pressing part), 96 ... relief part (release part), 100 ... optical connector, 106 ... core wire gripping part, 108, 109 ... arm pieces, 112 ... engaged parts, 116 ... engaging parts (release parts), 120 Optical connector 126... Core wire gripping portion 128... Elastic piece 132 132 Auxiliary gripping member 140... Optical connector 146 ... Core wire gripping portion 148 149. Arm piece, 150A, 150B, 150C ... claw part, 152 ... sliding contact part, 156 ... sliding contact part (release part), 160 ... optical connector, 166 ... core wire gripping member (Core wire gripping part), 172 ... mated part, 180 ... optical connector, 186 ... jig (core wire gripping part), 188 ... elastic piece

Claims (14)

A ferrule having a built-in optical fiber;
Provided integrally with the ferrule, the built-in optical fiber is inserted therein, and the protruding portion of the optical fiber core wire protruding from the sheath of the optical fiber cord and the end of the strength member is abutted with the built-in optical fiber inside. A fiber fixing part for fixing in a heated state,
A cord fixing part configured separately from the ferrule and the fiber fixing part, and fixed to at least one of the sheath and the tensile body;
A core wire gripping portion provided integrally with the cord fixing portion and gripping the protruding portion;
After the protruding portion and the built-in optical fiber are fixed by the fiber fixing portion, the front
An optical connector comprising: a release portion for releasing the grip of the protruding portion by the recording wire gripping portion .   2. The optical connector according to claim 1, wherein the release portion releases the grip of the protruding portion by the core wire gripping portion by contacting the core wire grip portion and deforming the core wire grip portion.   3. The optical connector according to claim 2, wherein the release portion is brought into contact with the core wire gripping portion and deforms the core wire gripping portion as the core wire gripping portion approaches the fiber fixing portion. The core wire gripping part is
A main body extending from the cord fixing portion toward the fiber fixing portion;
A plurality of claw portions formed on the distal end side of the main body portion and capable of gripping the protruding portion;
Have
The light according to claim 3, wherein the release portion is provided between the plurality of claw portions and the fiber fixing portion and is an extension portion that extends toward the plurality of claw portions. connector. The core wire gripping part is
An arm piece extending from the cord fixing portion toward the fiber fixing portion and capable of gripping the protruding portion;
A sliding contact portion formed on at least one of the plurality of arm pieces;
Have
The optical connector according to claim 3, wherein the release portion is a sliding contact portion that is slidably contacted with the sliding contact portion as the core wire gripping portion approaches the fiber fixing portion. A housing body for accommodating at least the fiber fixing portion;
A movable part supported to be displaceable by the housing body;
A housing having
The release portion is provided in the movable portion, and is brought into contact with the core wire gripping portion as the movable portion is displaced with respect to the housing main body to deform the core wire gripping portion. 2. The optical connector according to 2. The core wire gripping part is
A plurality of arm pieces extending from the cord fixing portion toward the fiber fixing portion and capable of gripping the protruding portion;
An engaged portion formed on at least one of the plurality of arm pieces;
Have
The release portion is an engagement portion that integrally displaces the engaged portion in an engaged state as the movable portion is displaced with respect to the housing body. Optical connector. A housing having at least a housing portion for housing the core wire gripping portion;
The core wire gripping portion extends from the cord fixing portion toward the fiber fixing portion, and has a plurality of elastic pieces for gripping the protruding portion in an elastically deformed state,
Between each said elastic piece and the said accommodating part, the press part for pressing each said elastic piece and making it the said elastic deformation state is provided,
2. The optical connector according to claim 1, wherein the release portion releases the pressing state of each elastic piece by the pressing portion when the plurality of elastic pieces approaches the fiber fixing portion . The pressing portion is a protrusion formed from one of the elastic piece and the accommodating portion toward the other,
The optical connector according to claim 8, wherein the release portion is an escape portion that is formed on the other of the elastic piece and the accommodating portion and into which the protrusion can enter.   The optical connector according to any one of claims 1 to 9, wherein the core wire gripping part is formed integrally with the cord fixing part.   The optical connector according to claim 1, wherein the core wire gripping part is configured separately from the cord fixing part. The core wire gripping portion extends from the cord fixing portion toward the fiber fixing portion, and has a plurality of elastic pieces for gripping the protruding portion in an elastically deformed state,
The optical connector according to claim 1, further comprising a gripping auxiliary member attached to the plurality of elastic pieces to cause the plurality of elastic pieces to be in the elastically deformed state. A housing body that accommodates at least the fiber fixing portion; and a housing that holds the cord fixing portion with respect to the housing body in a state in which the gripping of the protruding portion by the core wire gripping portion is released.
The optical connector as described in any one of Claims 1-12. A ferrule having a built-in optical fiber;
Provided integrally with the ferrule, a fiber fixing part in which the built-in optical fiber is inserted, a cord fixing part configured separately from the ferrule and the fiber fixing part, and integrated with the cord fixing part An optical connector provided with a sheath for the optical fiber cord and a core wire gripping portion for gripping the protruding portion of the optical fiber core wire protruding from the end of the strength member, and for attaching an optical connector to the optical fiber cord A connector assembly method comprising:
In a state where the projecting portion is gripped in the longitudinal direction with respect to the sheath and the strength member, the projecting portion is abutted against the built-in optical fiber inside the fiber fixing portion, and a gripping position in the projecting portion In this state, the protruding portion and the built-in optical fiber are fixed to each other by the fiber fixing portion.
An optical connector for releasing gripping of the protruding portion by a release portion for releasing gripping of the protruding portion by the core wire gripping portion after the protruding portion and the built-in optical fiber are fixed by the fiber fixing portion. Assembly method.

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