WO2011145450A1 - 光ファイバ接続器 - Google Patents
光ファイバ接続器 Download PDFInfo
- Publication number
- WO2011145450A1 WO2011145450A1 PCT/JP2011/060398 JP2011060398W WO2011145450A1 WO 2011145450 A1 WO2011145450 A1 WO 2011145450A1 JP 2011060398 W JP2011060398 W JP 2011060398W WO 2011145450 A1 WO2011145450 A1 WO 2011145450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base member
- optical fiber
- pressing member
- glass fiber
- groove
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3846—Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
- G02B6/3806—Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the fibres
Definitions
- the present invention relates to an optical fiber connector that mechanically fixes and connects optical fibers.
- This optical connector is composed of a base material having a groove formed on the surface and a lid arranged to press and cover the groove of the base material.
- the optical fiber arranged in the groove is grooved by pressing the lid. It has a structure to be held inside.
- the diameter of the optical fiber to be connected is large (for example, the coating diameter is 0.9 mm)
- the height of the ridges and guide walls to prevent the optical fiber from protruding must be increased, but these ridges and guide walls are provided in a narrow part inside the connector. It was difficult to mold the ridges and guide walls high. Further, since the ridges and guide walls are provided inside the connector, it is impossible to prevent the optical fiber from coming off at the optical fiber insertion entrance.
- the gap widened by the wedge gradually becomes wider toward the wedge insertion side, when the optical fiber comes off and enters the wedge insertion side of the gap at the insertion entrance of the optical fiber, the optical fiber is inserted into the center side. It cannot be returned to the groove, and the insertion operation must be performed again.
- the opening amount of the lid is large in Patent Document 2 or the like, the optical fiber can be guided to the groove by the back guide wall, but the opening amount of the lid is small and the opening diameter is smaller than the optical fiber diameter at the side of the groove. When it becomes small, even if an optical fiber contacts a guide wall, it does not enter a groove.
- An object of the present invention is to provide an optical fiber connector capable of smoothly and surely guiding an optical fiber to a receiving groove and holding and connecting the optical fiber satisfactorily.
- the optical fiber connector of the present invention capable of solving the above problems is as shown in the following (1) to (6).
- the gap between the joint surfaces is viewed from the insertion guide portion in the axial direction. It is less than the glass fiber diameter or has no gap.
- a ridge line at an end portion in the circumferential direction of the guide surface of the protrusion extends toward the housing groove.
- the insertion guide portion is configured such that the guide surface of the base member or the pressing member on the side where the projection portion is not provided It is preferable to have a semi-conical inner surface and a semi-cylindrical inner surface for accommodating.
- An optical fiber connector for connecting the glass fiber of the optical fiber core wire having the glass fiber exposed from the coating in abutment with another glass fiber,
- a base member in which an accommodation groove for accommodating the glass fiber is formed;
- a pressing member disposed at a position facing the base member;
- An urging member that presses and fixes the glass fiber accommodated in the accommodation groove by urging the base member and the pressing member in a proximity direction;
- At least one end of the base member and the pressing member is provided with an insertion guide portion for inserting the optical fiber core wire into the accommodation groove,
- the insertion guide portion is provided with a guide surface having a small inner diameter toward the receiving groove, respectively, on the base member and the pressing member, and either the base member or the pressing member has an insertion inlet side.
- a guide wall inclined toward the housing groove from the back side is provided, In the state where the joint surfaces of the base member and the pressing member facing each other against the biasing force of the biasing member are separated from one side in the cross-sectional direction with respect to the receiving groove, the cross-section is closer to the insertion inlet side than the guide wall.
- a gap between the base member on one side in the direction and the pressing member is not less than the glass fiber diameter.
- the insertion guide portion is formed on one of the base member and the pressing member on the insertion inlet side from the guide wall, with the base member in a cross-sectional direction with respect to the housing groove. It is preferable that the gap of the pressing member has a slope that is widened toward the housing groove.
- the inclined surface is provided on the base member.
- the tip of the optical fiber becomes the guide surface of the insertion guide portion of the base member and the pressing member. Is guided toward the receiving groove.
- the gap between the joint surfaces is less than the glass fiber diameter or there is no gap, so the optical fiber inserted into the housing groove enters the gap between the joint surfaces. Can be reliably prevented.
- an optical fiber can be reliably guide
- the tip of the optical fiber becomes the guide surface of the insertion guide portion of the base member and the pressing member. Is guided toward the receiving groove.
- the tip of the glass fiber enters the gap between the base member and the pressing member on one side in the cross-sectional direction, the glass fiber comes into contact with the guide wall on the back side of the gap.
- the gap between the base member on one side in the cross-sectional direction and the pressing member is equal to or larger than the diameter of the glass fiber, the glass fiber is guided and accommodated toward the accommodation groove by a guide wall inclined toward the accommodation groove. It is received in the groove.
- the glass fiber can be guided to the housing groove by the guide wall.
- an optical fiber can be reliably guide
- an optical connector 11 that is an optical fiber connector is a mechanical splice type optical connector, and is attached to an end of an optical fiber core wire 3 in which a glass fiber 1 is exposed from a coating 2. .
- the optical connector 11 has a ferrule 14 inside the housing 13.
- the ferrule 14 includes a built-in fiber 15 made of a short glass fiber, and the built-in fiber 15 extends from the rear end of the ferrule 14.
- the optical connector 11 includes a splice mechanism 21 on the rear side of the ferrule 14 in the housing 13. The splice mechanism 21 fixes the optical fiber core wire 3 inserted from the rear end side of the optical connector 11. .
- the splice mechanism 21 includes a base member 22, a pressing member 23 disposed at a position facing the base member 22, and a leaf spring member (biasing) that biases the base member 22 and the pressing member 23 in the proximity direction. Member) 24.
- the end of the optical fiber core 3 inserted between the base member 22 and the pressing member 23 is pressed and fixed between the base member 22 and the pressing member 23 by the urging force of the leaf spring member 24. It is like that.
- the housing 13 has a plurality of insertion openings 16 formed on the side thereof (see FIG. 1), and wedges (not shown) can be inserted into and removed from these insertion openings 16.
- wedges By inserting wedges into these insertion openings 16, the base member 22 and the pressing member 23 constituting the splice mechanism 21 are separated from each other against the urging force of the leaf spring member 24. Accordingly, the end portion of the optical fiber core wire 3 can be inserted and removed in an unclamped state where the base member 22 and the pressing member 23 are separated from each other.
- the base member 22 is integrally formed of, for example, resin, and a width direction (perpendicular to the fiber axis direction) is formed on a clamp surface (bonding surface) 22 a formed from the upper surface of the base member 22.
- the accommodation groove 26 is formed along the longitudinal direction at a central position in the direction of the direction of the movement.
- the accommodation groove 26 is formed in a V shape in a sectional view, and includes a fiber accommodation groove 26a and a core wire accommodation groove 26b.
- the fiber housing groove 26a on the ferrule 14 side accommodates the built-in fiber 15 extending from the ferrule 14 and the glass fiber 1 exposed from the coating 2 of the optical fiber core wire 3.
- the core wire housing groove 26b is a V-shaped groove larger than the fiber housing groove 26a, and the optical fiber core wire 3 having the coating 2 is housed in the core wire housing groove 26b.
- the housing groove 26 has a guide groove 26c between the core wire housing groove 26b and the fiber housing groove 26a.
- the guide groove 26c is formed such that the size of the groove gradually decreases from the end of the core wire accommodation groove 26b toward the fiber accommodation groove 26a.
- the glass fiber 1 of the optical fiber core wire 3 inserted from the rear end side of the optical connector 11 is smoothly guided to the fiber accommodation groove 26a.
- the glass fiber 1 guided and accommodated in the fiber accommodation groove 26a has its end face 1a abutted against the end face 15a of the built-in fiber 15 previously accommodated in the fiber accommodation groove 26a.
- the base member 22 is formed with a mounting groove 27 in the longitudinal direction on the clamp surface 22a in which the pressing member 23 is mounted. As shown in FIG. 4, the mounting groove 27 is inclined so that the side walls 27 a are gradually separated upward.
- the base member 22 is provided at its rear end with an insertion guide portion 28 for guiding and inserting the optical fiber core wire 3 with the glass fiber 1 exposed into the core wire housing groove 26b.
- the insertion guide portion 28 has a guide surface 29 having a small inner diameter toward the core wire housing groove 26 b of the housing groove 26.
- the guide surface 29 has a semi-conical inner surface portion 29a formed in a semi-conical shape and a semi-cylindrical inner surface portion 29b formed in a semi-cylindrical shape.
- the pressing member 23 is integrally molded with resin, for example, and is mounted in a mounting groove 27 formed on the clamp surface 22 a of the base member 22.
- the pressing member 23 is pressed against the base member 22 by the urging force of the leaf spring member 24, thereby pressing the built-in fiber 15, the glass fiber 1, and the optical fiber core wire 3 accommodated in the accommodation groove 26. Fix it.
- a pressing surface portion 31 is formed on a clamp surface (joining surface) 23 a formed from the lower surface of the pressing member 23, and the built-in fiber 15 and the glass fiber 1 are configured to have a pressing surface portion 31 of the pressing member 23. Is pressed against the base member 22.
- a core wire pressing groove 32 is formed on the clamping surface 23 a of the pressing member 23 at a position facing the core wire receiving groove 26 b of the base member 22, and is disposed in the core wire receiving groove 26 b of the base member 22.
- the optical fiber core wire 3 thus pressed is pressed toward the core wire housing groove 26 b by the bottom surface portion 32 a of the core wire pressing groove 32 of the pressing member 23.
- the pressing member 23 is provided with an insertion guide portion 33 at the rear end thereof for guiding and inserting the optical fiber core wire 3 with the glass fiber 1 exposed into the receiving groove 26.
- the insertion guide portion 33 has a semiconical guide surface 34 having a small inner diameter toward the core wire housing groove 26 b of the housing groove 26.
- the pressing member 23 is provided with a protrusion 35 formed so that the guide surface 34 extends toward the guide surface 29 of the base member 22. As shown in FIG. 7, these protrusions 35 enter the insertion guide portion 28 of the base member 22 and are arranged along the guide surface 29 of the base member 22.
- the protrusion 35 is disposed at a position having a slight gap in the insertion direction between the protrusion 35 and the guide surface 29 of the base member 22, and the insertion end side of the protrusion 35 is accommodated in the semi-cylindrical inner surface 29b. Thereby, even if there is a positional shift in the length direction between the base member 22 and the pressing member 23, it is possible to prevent the insertion guide portion 28 from interfering with each other.
- these protrusions 35 are formed such that the ridge line 35a at the circumferential end of the guide surface 34 extends toward the core wire accommodation groove 26b.
- Both side surfaces 23b of the pressing member 23 are inclined so that lower end portions corresponding to the protrusions 35 are gradually separated upward as in the case of both side walls 27a of the mounting groove 27 of the base member 22.
- the upper side from the inclined lower end portion is formed in parallel. Accordingly, as shown in FIG. 7, when the pressing member 23 is mounted in the mounting groove 27 of the base member 22, the space between the side wall 27 a of the mounting groove 27 of the base member 22 and the side surface 23 b of the pressing member 23 is upward. A gap that gradually widens is formed.
- the leaf spring member 24 that holds the base member 22 and the pressing member 23 includes a pair of pressing piece portions 52 that extend in the same direction from the upper and lower ends of a connecting piece portion (not shown). It is formed in a U-shaped or U-shaped cross section.
- the pressing piece 52 of the leaf spring member 24 is in contact with the base member 22 and the pressing member 23.
- the pressing piece 52 is divided into a fiber side pressing piece 52a and a core side pressing piece 52b.
- the urging force by the leaf spring member 24 is released, that is, the unclamped state where the wedge member is inserted into the insertion port 16 of the housing 13 and the base member 22 and the pressing member 23 are separated from each other.
- the pressing member 23 is inclined to the side opposite to the wedge insertion side until the side surface 23 b comes into contact with the side wall 27 a of the mounting groove 27, and the clamping surface 22 a of the base member 22 Between the clamp surface 23a of the pressing member 23, a gap that gradually widens toward the side where the wedge is inserted (left side in the figure) is formed.
- both protrusions 35 of the insertion guide portion 33 of the pressing member 23 are in a state of entering the insertion guide portion 28 of the base member 22. That is, the protrusion 35 on the wedge insertion side is maintained in a state of entering the insertion guide 28 of the base member 22. Further, the protrusion 35 on the side opposite to the wedge insertion side is pulled out from the insertion guide portion 28 of the base member 22 even if the pressing member 23 is deformed in a direction away from the base member 22 due to a change with time. Therefore, no gap is formed.
- the receiving groove 26 is viewed from the insertion guide portions 27 and 33 side which are insertion side ends of the optical connector 11 in the axial direction, and the clamp surfaces of the base member 22 and the pressing member 23 are clamped.
- the gap between 22a and 23a does not appear and does not exist.
- the optical fiber core wire 3 in which the glass fiber 1 is exposed from the coating 2 is inserted from the rear end side that is the insertion inlet of the optical connector 11. Then, the distal end portion of the glass fiber 1 is guided toward the housing groove 26 by the guide surfaces 29 and 34 of the insertion guide portions 28 and 33 of the base member 22 and the pressing member 23.
- the protrusion 35 of the insertion guide portion 33 of the pressing member 23 enters the insertion guide portion 28 of the base member 22 regardless of the amount of opening between the base member 22 and the pressing member 23, and the base member 22 and the pressing member 23 are pressed.
- the glass fiber 1 does not enter the gap between the clamp surfaces 22a and 23a. Thereby, the glass fiber 1 can be reliably guided toward the accommodation groove 26 at the insertion side end of the optical connector 11.
- the optical connector 11 it is possible to easily cope with the optical fiber core wire 3 having a large outer diameter (for example, an outer diameter of 0.9 mm) by increasing the protruding amount of the protruding portion 35. it can. That is, by increasing the protrusion amount of the protrusion 35, the optical connector 11 can be very easily guided to the receiving groove 26 with the optical fiber core wire 3 having a large outer diameter.
- the glass fiber 1 of the optical fiber core wire 3 inserted from the rear end of the optical connector 11 can be reliably guided and guided to the receiving groove 26 not only by the guide surface 34 of the insertion guide portion 34 but also by the ridge line 35a. it can.
- the wedge is removed from the insertion port 16. Then, the urging force of the leaf spring member 24 acts to bring the base member 22 and the pressing member 23 into a clamped state, and the built-in fiber 15, the glass fiber 1, and the optical fiber core wire 3 are pressed and fixed. Since the opening amount of the base member 22 and the pressing member 23 may be small, the deformation amount of the leaf spring member 24 can be reduced when the wedge is inserted and removed, and it is difficult to reach the yield point of the leaf spring member 24 (hard to plastically deform). ).
- the protruding portion 35 of the pressing member 23 is detached from the insertion guide portion 28 of the base member 22, and the insertion guide portions 28, Even when the gap between the clamp surfaces 22 a and 23 a of the base member 22 and the pressing member 23 appears and exists when the accommodation groove 26 is viewed in the axial direction from 33, the gap may be smaller than the diameter of the glass fiber 1. Even in this case, since the gap is less than the diameter of the glass fiber 1, the glass fiber 1 of the optical fiber core wire 3 is guided to the receiving groove 26 without entering the gap.
- the protrusion 35 is provided on the pressing member 23.
- a protrusion may be provided on the base member 22 side.
- the guide surface 29 on the base member 22 side has the semi-conical inner surface portion 29a and the semi-cylindrical inner surface portion 29b, the guide surface 29 may be formed in a conical shape as a whole.
- the guide surface 34 on the pressing member 23 side may have a semiconical inner surface portion and a semicylindrical inner surface portion.
- the optical connector 11 ⁇ / b> A that is the optical fiber connector of the second embodiment is different in the configuration of the insertion guide portion from the optical connector 11 of the first embodiment, and has an external appearance. Is the same as the optical connector 11 of FIG.
- Insertion guide portion 28A is provided in the base member 22 of the optical connector 11A.
- the insertion guide portion 28 ⁇ / b> A has a semi-conical guide surface 29 ⁇ / b> A having a small inner diameter toward the core wire housing groove 26 b of the housing groove 26.
- the insertion guide portion 28A is formed with guide protrusions 30 projecting toward the pressing member 23 on the clamp surfaces 22a on both sides of the core wire housing groove 26b of the housing groove 26.
- the wall on the insertion entrance side of the optical fiber core wire 3 in these guide protrusions 30 is a guide wall 30a, and these guide walls 30a are inclined from the insertion entrance side to the back side toward the accommodation groove 26. It is formed into a shape.
- These guide protrusions 30 have a height dimension sufficiently larger than the diameter of the glass fiber 1.
- the insertion guide portion 28A is formed with a slope 22b made of a part of the clamp surface 22a on the insertion entrance side of the guide protrusion 30.
- These inclined surfaces 22b are formed in a shape that gradually inclines toward the pressing member 23 from the radially inner side on the housing groove 26 side toward the radially outer side.
- the insertion guide portion 33 ⁇ / b> A provided at the rear end of the pressing member 23 is a semi-conical guide having a small inner diameter toward the core wire housing groove 26 b of the housing groove 26. It has a surface 34A.
- engagement concave portions 35A are formed on the clamp surfaces 23a on both side portions of the core wire pressing groove 32.
- These engaging recesses 35 ⁇ / b> A accommodate the guide protrusions 30 formed on the base member 22, and the wall surface on the insertion entrance side of the optical fiber core wire 3 in the engaging recesses 35 ⁇ / b> A is the guide surface of the guide protrusions 30.
- Reference numeral 30a denotes a slidable sliding surface 35b.
- a flat surface 23c that is the same surface as the clamp surface 23a is provided on the insertion entrance side of the optical fiber core wire 3 in the insertion guide portion 33A.
- the both side surfaces 23b of the pressing member 23 are formed in parallel to each other. Accordingly, as shown in FIG. 14, when the pressing member 23 is mounted in the mounting groove 27 of the base member 22, the space between the side wall 27 a of the mounting groove 27 of the base member 22 and the side surface 23 b of the pressing member 23 moves upward. A gap that gradually widens is formed.
- the pressing member 23 is inserted into the insertion port 16 of the housing 13 and the base member 22 and the pressing member 23 are separated from each other. It is inclined until the side surface 23b comes into contact with the side wall 27a of the mounting groove 27 on the side opposite to the wedge insertion side, and the wedge is interposed between the clamp surface 22a of the base member 22 and the clamp surface 23a of the pressing member 23. A gap that gradually widens toward the inserted side (left side in the figure) is formed.
- the gap S between the inclined surface 22b of the base member 22 on one side in the cross-sectional direction which is the wedge insertion side and the flat surface 23c of the pressing member 23 is It becomes more than the diameter of the glass fiber 1.
- the inclined surface 22b forming the gap S is formed in a shape that is gradually inclined toward the pressing member 23 from the radially inner side on the housing groove 26 side toward the radially outer side. Is in a state of being expanded toward the accommodation groove 26.
- the optical fiber core wire 3 in which the glass fiber 1 is exposed from the coating 2 is inserted from the rear end side that is the insertion inlet of the optical connector 11A. Then, the distal end portion of the glass fiber 1 is guided toward the accommodation groove 26 by the guide surfaces 29A and 34A of the insertion guide portions 28A and 33A of the base member 22 and the pressing member 23.
- the glass fiber 1 When the tip of the glass fiber 1 enters the gap S between the inclined surface 22b of the base member 22 on one side in the cross-sectional direction on the wedge insertion side and the flat surface 23c of the pressing member 23, the glass fiber 1 It abuts against the guide wall 30a of the guide projection 30 of the base member 22 arranged on the side. At this time, since the gap S is equal to or larger than the diameter of the glass fiber 1, the glass fiber 1 is guided toward the housing groove 26 by the guide wall 30 a inclined toward the housing groove 26 without a problem of being caught on the way. And accommodated in the accommodating groove 26.
- this optical connector 11A even if the glass fiber 1 enters the gap S formed in the unclamped state, the glass fiber 1 is satisfactorily guided and accommodated in the accommodation groove 26 by the guide wall 30a. Can do.
- the gap S has a shape that widens toward the accommodation groove 26, the glass fiber 1 guided to the accommodation groove 26 by the guide wall 30a regardless of the amount of opening between the base member 22 and the pressing member 23. In the gap S, it can be smoothly guided to the receiving groove 26.
- the optical fiber core wire 3 has a large outer diameter (for example, an outer diameter of 0.9 mm) by increasing the protruding amount of the guide protrusion 30 and increasing the height of the guide wall 30a. It can be easily adapted to. That is, by raising the guide wall 30a, the optical connector 11A capable of smoothly and smoothly guiding the optical fiber core wire 3 having a large outer diameter to the housing groove 26 can be obtained.
- the wedge is removed from the insertion port 16. Then, the urging force of the leaf spring member 24 acts to bring the base member 22 and the pressing member 23 into a clamped state, and the built-in fiber 15, the glass fiber 1, and the optical fiber core wire 3 are pressed and fixed. Since the opening amount of the base member 22 and the pressing member 23 may be small, the deformation amount of the leaf spring member 24 can be reduced when the wedge is inserted and removed, and it is difficult to reach the yield point of the leaf spring member 24 (hard to plastically deform). ).
- the guide protrusion 30 having the guide wall 30a is provided on the base member 22.
- the guide protrusion having the guide wall may be provided on the pressing member 23 side.
- the slope 22b is formed on the base member 22 so that the gap S widens toward the housing groove 26 when unclamped.
- the flat surface 23c of the pressing member 23 is not unclamped.
- a slope may be used.
- the pressing length of the optical fiber core wire 3 by the pressing member 23 can be increased.
- the pressing member 23 may be divided into a portion that presses the built-in fiber 15 and the glass fiber 1 and a portion that presses the optical fiber core wire 3. If it does in this way, the opening amount in an unclamped state can be adjusted independently by the part which presses the built-in fiber 15 and the glass fiber 1, and the part which presses the optical fiber core wire 3. FIG. For example, in the unclamped state, the opening amount of the portion that presses the optical fiber core wire 3 with respect to the portion that presses the built-in fiber 15 and the glass fiber 1 is increased, and the optical fiber core wire 3 that exposes the glass fiber 1 is increased. The insertion can be facilitated.
- the pressing member 23 is divided into a portion that presses the built-in fiber 15 and the glass fiber 1 and a portion that presses the optical fiber core wire 3, a portion that presses the built-in fiber 15 and glass fiber 1 and the optical fiber core wire 3. It is also possible to independently adjust the urging force by the leaf spring member 24 with the portion that presses. For example, the clamping force of the portion that presses the built-in fiber 15 and the glass fiber 1 is made larger than that of the portion that presses the optical fiber core wire 3, so that the built-in fiber 15 having the butted portion T and the glass fiber 1 have a strong force. It can be gripped with.
- the pressing member 23 in which the portion that presses the built-in fiber 15 and the glass fiber 1 and the portion that presses the optical fiber core wire 3 are integrated is used as in the first and second embodiments, the number of parts is increased. The cost can be reduced by reducing the number of components, and the positional deviation between components can be eliminated.
- an optical fiber connector (mechanical splice) in which an optical fiber core wire 3 with a glass fiber 1 exposed from a coating 2 is inserted from both ends and the glass fibers 1 of these optical fiber core wires 3 are butted together and connected. It is also applicable to.
- This optical fiber connector is also formed in the housing groove by biasing the base member in which the housing groove is formed, the pressing member disposed at the position facing the base member, and the base member and the pressing member in the proximity direction.
- a mechanical splice mechanism having a glass fiber 1 to be accommodated and a leaf spring member for pressing and fixing the optical fiber core wire 3 is provided.
- the insertion guide portions 28 and 33 or the insertion guide portion 28A having the above-described structure are inserted into the base member and the pressing member at the insertion inlets at both ends where the optical fiber core wire 3 with the glass fiber 1 exposed is inserted. , 33A.
- the optical fiber core wire 3 in which the glass fiber 1 is exposed from both ends to the receiving groove can be smoothly and reliably guided and satisfactorily held and connected.
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Abstract
Description
この光接続器は、表面に溝が形成された基材と、基材の溝を押圧して覆うように配置される蓋とからなり、溝内に配置される光ファイバを蓋の押圧により溝内に保持する構造を有している。
また、基材と蓋とを広げるために挿入される楔の挿入側に、溝に沿って上方に突出するガイド壁を形成し、ガイド壁によって光ファイバが楔挿入スリット側にはみ出すことを抑えるものも知られている(例えば、特許文献2参照)。
(1) ガラスファイバを被覆から露出させた光ファイバ心線の前記ガラスファイバを、他のガラスファイバと突き合わせて接続する光ファイバ接続器であって、
前記ガラスファイバを収容する収容溝が形成されたベース部材と、
前記ベース部材の対向位置に配設された押圧部材と、
前記ベース部材と前記押圧部材とを近接方向へ付勢することにより、前記収容溝に収容される前記ガラスファイバを押圧固定させる付勢部材とを備え、
前記ベース部材及び前記押圧部材の少なくとも一端には、前記収容溝に前記光ファイバ心線を挿入するための挿入案内部が設けられ、
前記挿入案内部は、前記収容溝に向けて内径が小さく形成された案内面が前記ベース部材及び前記押圧部材にそれぞれ設けられ、前記ベース部材及び前記押圧部材の何れか一方には、前記案内面が他方の案内面に向かって延びた突起部が設けられ、
前記付勢部材の付勢力に抗して前記ベース部材と前記押圧部材の対向する接合面を離開させた状態で、前記挿入案内部から前記収容溝を軸方向でみて前記接合面同士の隙間が前記ガラスファイバ径未満である、または前記隙間がないことを特徴とする。
前記ガラスファイバを収容する収容溝が形成されたベース部材と、
前記ベース部材の対向位置に配設された押圧部材と、
前記ベース部材と前記押圧部材とを近接方向へ付勢することにより、前記収容溝に収容される前記ガラスファイバを押圧固定させる付勢部材とを備え、
前記ベース部材及び前記押圧部材の少なくとも一端には、前記収容溝に前記光ファイバ心線を挿入するための挿入案内部が設けられ、
前記挿入案内部は、前記収容溝に向けて内径が小さく形成された案内面が前記ベース部材及び前記押圧部材にそれぞれ設けられ、前記ベース部材及び前記押圧部材の何れか一方には、挿入入口側から奥側へ前記収容溝に向けて傾斜した案内壁が設けられ、
前記付勢部材の付勢力に抗して前記ベース部材と前記押圧部材の対向する接合面を前記収容溝に対する断面方向一方側から離開させた状態で、前記案内壁より挿入入口側では、前記断面方向一方側の前記ベース部材と前記押圧部材の隙間が、前記ガラスファイバ径以上であることを特徴とする。
また、ガラスファイバの先端が、断面方向一方側のベース部材と押圧部材との隙間に入り込むと、このガラスファイバは、その隙間の奥側の案内壁に当接する。このとき、断面方向一方側のベース部材と押圧部材との隙間は、ガラスファイバの径以上であるので、ガラスファイバは、収容溝に向けて傾斜した案内壁によって収容溝へ向かって案内されて収容溝へ収容される。つまり、接合面を収容溝に対する断面方向一方側から離開させた非クランプ状態において形成される隙間にガラスファイバが入り込んでも、このガラスファイバを案内壁によって収容溝へ案内することができる。これにより、光ファイバを挿入側の端部において確実に収容溝へ向かって導くことができる。
(第1実施形態)
図1及び図2に示すように、光ファイバ接続器である光コネクタ11は、メカニカルスプライス型光コネクタであり、ガラスファイバ1を被覆2から露出させた光ファイバ心線3の端部に取り付けられる。
光コネクタ11には、ハウジング13内におけるフェルール14の後方側に、スプライス機構21を備えており、このスプライス機構21は、光コネクタ11の後端側から挿し込んだ光ファイバ心線3を固定する。
ベース部材22と押圧部材23との間へ挿入された光ファイバ心線3の端部が、板バネ部材24の付勢力によってベース部材22と押圧部材23との間に押圧されて、固定されるようになっている。
心線収容溝26bは、ファイバ収容溝26aよりも大きなV字状の溝からなり、この心線収容溝26bには、被覆2を有する光ファイバ心線3が収容される。
なお、ベース部材22と押圧部材23との開き量が小さくてもよいので、楔の挿抜時に板バネ部材24の変形量を小さくでき、板バネ部材24の降伏点に達しにくい(塑性変形しにくい)。
本発明に係る光ファイバ接続器の第2実施形態を説明する。なお、前述した実施形態と共通する部位には同じ符号を付して、重複する説明を省略する。
また、挿入案内部33Aにおける光ファイバ心線3の挿入入口側には、クランプ面23aと同一面からなる平面23cが設けられている。
また、この隙間Sを形成する斜面22bが、収容溝26側の径方向内方側から径方向外方へ向かって次第に押圧部材23側へ傾斜した形状に形成されていることより、この隙間Sは、収容溝26に向けて広げられた状態とされる。
特に、隙間Sが収容溝26へ向かって広がる形状とされるので、ベース部材22と押圧部材23との開き量の大小によらず、案内壁30aによって収容溝26へ案内されるガラスファイバ1を隙間S内において円滑に収容溝26へ導くことができる。
なお、ベース部材22と押圧部材23との開き量が小さくてもよいので、楔の挿抜時に板バネ部材24の変形量を小さくでき、板バネ部材24の降伏点に達しにくい(塑性変形しにくい)。
また、第2実施形態では、非クランプ時において収容溝26に向けて隙間Sが広がるようにするために、ベース部材22に斜面22bを形成したが、押圧部材23の平面23cを、非クランプ時において収容溝26に向けて隙間Sが広がるようにするために斜面としても良い。なお、ベース部材22に斜面22bを形成することにより、押圧部材23による光ファイバ心線3の押圧長さを長くすることができる。
Claims (6)
- ガラスファイバを被覆から露出させた光ファイバ心線の前記ガラスファイバを、他のガラスファイバと突き合わせて接続する光ファイバ接続器であって、
前記ガラスファイバを収容する収容溝が形成されたベース部材と、
前記ベース部材の対向位置に配設された押圧部材と、
前記ベース部材と前記押圧部材とを近接方向へ付勢することにより、前記収容溝に収容される前記ガラスファイバを押圧固定させる付勢部材とを備え、
前記ベース部材及び前記押圧部材の少なくとも一端には、前記収容溝に前記光ファイバ心線を挿入するための挿入案内部が設けられ、
前記挿入案内部は、前記収容溝に向けて内径が小さく形成された案内面が前記ベース部材及び前記押圧部材にそれぞれ設けられ、前記ベース部材及び前記押圧部材の何れか一方には、前記案内面が他方の案内面に向かって延びた突起部が設けられ、
前記付勢部材の付勢力に抗して前記ベース部材と前記押圧部材の対向する接合面を離開させた状態で、前記挿入案内部から前記収容溝を軸方向でみて前記接合面同士の隙間が前記ガラスファイバ径未満である、または前記隙間がないことを特徴とする光ファイバ接続器。 - 請求項1に記載の光ファイバ接続器であって、
前記突起部の案内面における周方向の端部の稜線が、前記収容溝に向かって延びていることを特徴とする光ファイバ接続器。 - 請求項1または2に記載の光ファイバ接続器であって、
前記挿入案内部は、前記突起部が設けられていない側の前記ベース部材または前記押圧部材の案内面が、前記突起部を収容する半円錐内面部と半円筒内面部を有することを特徴とする光ファイバ接続器。 - ガラスファイバを被覆から露出させた光ファイバ心線の前記ガラスファイバを、他のガラスファイバと突き合わせて接続する光ファイバ接続器であって、
前記ガラスファイバを収容する収容溝が形成されたベース部材と、
前記ベース部材の対向位置に配設された押圧部材と、
前記ベース部材と前記押圧部材とを近接方向へ付勢することにより、前記収容溝に収容される前記ガラスファイバを押圧固定させる付勢部材とを備え、
前記ベース部材及び前記押圧部材の少なくとも一端には、前記収容溝に前記光ファイバ心線を挿入するための挿入案内部が設けられ、
前記挿入案内部は、前記収容溝に向けて内径が小さく形成された案内面が前記ベース部材及び前記押圧部材にそれぞれ設けられ、前記ベース部材及び前記押圧部材の何れか一方には、挿入入口側から奥側へ前記収容溝に向けて傾斜した案内壁が設けられ、
前記付勢部材の付勢力に抗して前記ベース部材と前記押圧部材の対向する接合面を前記収容溝に対する断面方向一方側から離開させた状態で、前記案内壁より挿入入口側では、前記断面方向一方側の前記ベース部材と前記押圧部材の隙間が、前記ガラスファイバ径以上であることを特徴とする光ファイバ接続器。 - 請求項4に記載の光ファイバ接続器であって、
前記挿入案内部は、前記案内壁より挿入入口側における前記ベース部材と前記押圧部材の一方に、前記収容溝に対する断面方向で前記ベース部材と前記押圧部材の隙間が前記収容溝に向けて広げられる斜面を有することを特徴とする光ファイバ接続器。 - 請求項5に記載の光ファイバ接続器であって、
前記斜面は、前記ベース部材に設けられていることを特徴とする光ファイバ接続器。
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