WO2022107366A1 - キャップ - Google Patents
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- Publication number
- WO2022107366A1 WO2022107366A1 PCT/JP2021/021530 JP2021021530W WO2022107366A1 WO 2022107366 A1 WO2022107366 A1 WO 2022107366A1 JP 2021021530 W JP2021021530 W JP 2021021530W WO 2022107366 A1 WO2022107366 A1 WO 2022107366A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ferrule
- housing
- cap
- contact
- optical connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- 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
- G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces
- G02B6/3849—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces using mechanical protective elements, e.g. caps, hoods, sealing membranes
-
- 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
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/3821—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading 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
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
-
- 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
- G02B6/389—Dismountable connectors, i.e. comprising plugs characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type
- G02B6/3893—Push-pull type, e.g. snap-in, push-on
Definitions
- This disclosure relates to a cap used for an optical connector.
- Patent Document 1 discloses an optical connector in which a ferrule floats in a housing. Further, as an example of an optical connector in which a ferrule floats in a housing, for example, an MPO connector (F13 type multi-core optical fiber connector established in JIS C5982) is known.
- MPO connector F13 type multi-core optical fiber connector established in JIS C5982
- the ferrule In order to float the ferrule in the housing, it is necessary to provide a gap between the ferrule and the housing. However, the position of the ferrule with respect to the housing may vary due to the gap between the ferrule and the housing. If the ferrule is connected to the mating optical connector in an inappropriate position with respect to the housing, the optical axes of the optical fibers may be displaced from each other, and the transmission loss of the optical signal may increase.
- the main invention for achieving the above object is a cap that can be attached to an optical connector including a ferrule and a housing that slidably accommodates the ferrule, which can be attached to the optical connector and the housing.
- a main body portion that covers the connection end surface of the ferrule protruding from the housing, a side surface of the ferrule protruding from the housing, a housing contact portion that contacts the housing inside the main body portion, and the housing contact portion on the housing.
- the ferrule of the optical connector can be adjusted to an appropriate position.
- FIG. 1A is a perspective view of the optical connector 100 with a cap.
- FIG. 1B is a perspective view showing a state in which the cap 50 is removed from the optical connector 1.
- FIG. 2 is an exploded view of the optical connector 100 with a cap.
- FIG. 3 is an orthographic projection of the cap 50 in each direction.
- FIG. 4 is a perspective view of the cap 50.
- 5A and 5B are explanatory views showing the internal structure of the cap 50.
- 6A and 6B are explanatory views in a state where the cap 50 is attached to the optical connector 1.
- 7A to 7D are explanatory views of the inside of the cap 50 when the cap is attached.
- FIG. 8 is an explanatory diagram of a state in which the cap 50 of the second embodiment is attached to the optical connector 1.
- FIG. 9 is an explanatory diagram of a state in which the cap 50 of the third embodiment is attached to the optical connector 1.
- FIG. 10 is an explanatory diagram of the cap 50 of the fourth embodiment.
- 11A and 11B are explanatory views of the misalignment of the ferrule 10.
- FIG. 12A is an explanatory diagram of a mechanism in which the ferrule 10 is displaced.
- FIG. 12B is an explanatory diagram of an appropriate position of the ferrule 10.
- FIG. 1A is a perspective view of the optical connector 100 with a cap.
- FIG. 1B is a perspective view showing a state in which the cap 50 is removed from the optical connector 1.
- FIG. 2 is an exploded view of the optical connector 100 with a cap.
- each direction is defined as shown in FIG. 1B. That is, the attachment / detachment direction of the cap 50 with respect to the optical connector 1 is the "front-back direction", the side of the cap 50 with respect to the optical connector 1 is “front”, and the opposite side is “rear”.
- the front-back direction may be referred to as a "detachment / detachment direction”.
- the front-rear direction since the ferrule 10 can slide in the front-rear direction with respect to the housing 20, the front-rear direction may be referred to as a "sliding direction”.
- the front side may be referred to as the "tip side”
- the rear side may be referred to as the "base end side”.
- the direction in which the pair of guide pins 111 (or guide holes 11) are lined up is defined as the "left-right direction", the right side when the front side is viewed from the rear side is defined as “right”, and the opposite side is defined as "left”.
- the left-right direction is sometimes called the "width direction”.
- the direction perpendicular to the front-back direction and the left-right direction is referred to as “vertical direction”
- the side provided with the key 21 of the optical connector 1 is referred to as "up”
- the opposite side is referred to as "down”.
- the capped optical connector 100 of the present embodiment has an optical connector 1 and a cap 50.
- the optical connector 1 of this embodiment is an MPO (Multifiber Push-On) optical connector defined by JIS C 5982 or IEC 61754-7.
- the optical connector is not limited to the MPO optical connector, and may be another optical connector.
- the optical connector 1 is an optical connector capable of collectively connecting a plurality of optical fibers.
- the optical connector 1 has a ferrule 10, a housing 20, and a floating mechanism 40.
- the ferrule 10 is a member that holds the end of the optical fiber.
- the ferrule 10 of the present embodiment is an MT connector (MT ferrule) established in JIS C 5981 and IEC 61754-5.
- the ferrule 10 has a pair of guide holes 11, a plurality of fiber holes 12, and an end face 13.
- the guide hole 11 is a hole into which the guide pin 111 is inserted.
- the guide pin 111 is previously mounted in the guide hole 11 so that the end portion of the guide pin 111 protrudes from the guide hole 11.
- the guide pin 111 of the mating connector is inserted into the guide hole 11.
- the guide hole 11 together with the guide pin 111 is a portion constituting the positioning portion.
- the guide holes 11 (and the guide pins 111) are arranged along the front-rear direction.
- the pair of guide holes 11 (and the guide pins 111) are arranged side by side in the width direction.
- the pair of guide holes 11 (and the guide pins 111) are arranged so as to sandwich the plurality of fiber holes 12 from the width direction.
- the fiber hole 12 is a hole for inserting an end portion of an optical fiber.
- the end of the optical fiber is fixed to each fiber hole 12.
- Each fiber hole 12 is formed along the front-rear direction.
- the plurality of fiber holes 12 are arranged side by side in the width direction.
- rows of a plurality of fiber holes 12 arranged in the width direction are arranged in two rows above and below, and 12 fiber holes 12 are arranged side by side in the width direction in each row.
- the row of the plurality of fiber holes 12 arranged in the width direction may be one row or two or more rows.
- the fiber holes 12 of the present embodiment are arranged so as to be displaced in the vertical direction by a predetermined offset amount in anticipation of the amount of positional deviation due to the gap between the guide pin 111 and the guide hole 11.
- the end face 13 is an end face on the tip end side (front side; side of the mating connector (not shown)) of the ferrule 10.
- the end face 13 is a connection end face with the ferrule of the mating connector.
- the end face 13 is inclined (the end face 13 is an inclined end face). Specifically, the end face 13 is inclined by about 8 degrees with respect to the plane perpendicular to the optical axis of the optical fiber.
- the end face 13 is formed by being diagonally polished together with the end face of the optical fiber inserted into the fiber hole 12.
- the end surface 13 is inclined so as to project toward the tip end side (front side; the side of the mating connector) toward the upper side (the side of the key 21).
- the ferrule 10 has a main body portion 14 and a flange portion 15.
- the flange portion 15 is a portion (flange portion) protruding outward from the side surface of the main body portion 14.
- the end of the ferrule 10 protrudes from the opening of the housing 20. Therefore, the end face 13 protrudes from the housing 20. Further, the side surface of the ferrule 10 on the distal end side also protrudes from the housing 20.
- the side surface of the ferrule 10 is a surface constituting the outer peripheral surface of the main body portion 14, and includes the upper surface, the lower surface, the right surface, and the left surface of the ferrule 10 in the drawing.
- the ferrule 10 is slidable in the front-rear direction (sliding direction) with respect to the housing 20, and the side surface of the ferrule 10 is composed of a surface parallel to the front-rear direction (sliding direction).
- the end surface 13 is inclined, and the upper surface of the side surface of the ferrule 10 protrudes from the housing 20 with respect to the lower surface (the surface opposite to the upper surface).
- the protruding side surface (here, the upper surface) of the ferrule 10 is referred to as "first side surface 10A”
- the non-projecting side surface (here, lower surface) of the ferrule 10 is referred to as "second side surface 10B”. May be called.
- a pin clamp 17 is arranged on the base end side (rear side) of the ferrule 10.
- the pin clamp 17 holds the base end (rear end) of the guide pin 111.
- the guide pin 111 is arranged so as to penetrate the guide hole 11 of the ferrule 10, and the tip of the guide pin 111 protrudes from the end surface 13.
- the housing 20 is a cylindrical accommodating member.
- the housing 20 is a member that houses the ferrule 10 and the floating mechanism 40.
- the end portion of the ferrule 10 protrudes from the opening of the housing 20, and the end surface 13 of the ferrule 10 protrudes from the housing 20.
- the housing 20 slidably accommodates the ferrule 10, and accommodates the ferrule 10 so as to be retractable while pressing toward the tip side (front side).
- the inner wall surface of the housing 20 is provided with a protruding portion 22 (see FIG. 6B) that projects inward.
- the protruding portion 22 comes into contact with the flange portion 15 of the ferrule 10 to prevent the ferrule 10 from slipping forward.
- a locking portion 23 is provided on the side surface of the housing 20.
- the locking portion 23 is a portion where the claw portion of the connection destination of the optical connector 1 (for example, the claw portion of the optical adapter) is caught, and is a portion serving as a mechanical reference position of the optical connector
- a coupling 30 is arranged on the outer circumference of the housing 20.
- the coupling 30 is provided so as to be movable in the front-rear direction with respect to the housing 20.
- a spring 31 is arranged between the coupling 30 and the housing 20. The coupling 30 is pressed forward with respect to the housing 20 by the spring 31.
- the coupling 30 is a portion operated by an operator (operation to move the optical connector 1 to the rear side with respect to the housing 20) when the optical connector 1 is removed.
- the floating mechanism 40 is a mechanism that presses the ferrule 10 toward the tip side (front side).
- the floating mechanism 40 has a spring 41 and a spring push 42.
- the spring 41 is an elastic member (urging member) that urges the ferrule 10.
- the spring 41 is housed in the housing 20 in a state of being compressed and deformed between the ferrule 10 (specifically, the pin clamp 17) and the spring push 42.
- the spring push 42 is a member that accommodates the spring 41 in the housing 20 in a compressed state.
- the spring push 42 has a pair of arm portions 421.
- the spring 41 is accommodated in the space between the pair of arm portions 421.
- a claw portion 421A is formed outward at the front end of the arm portion 421. By hooking the claw portion 421A on the window portion 24 on the side surface of the housing 20, the spring push 42 can be attached to the housing 20 in a compressed state.
- the boot 43 can be attached to the base end side (rear side) of the spring push 42.
- the ferrule 10 retracts with respect to the housing 20 by receiving a force from the ferrule of the mating connector, and the flange portion 15 of the ferrule 10 and the housing 20 protrude.
- the unit 22 is separated from the unit 22.
- the floating mechanism 40 forces the ferrule 10 toward the ferrule of the mating connector with the flange portion 15 of the ferrule 10 and the protruding portion 22 of the housing 20 separated from each other. Will be pressed with.
- the state in which the flange portion 15 of the ferrule 10 and the protruding portion 22 of the housing 20 are separated from each other may be referred to as a “floating state”.
- FIG. 11A and 11B are explanatory views of the misalignment of the ferrule 10.
- FIG. 11A is an explanatory view showing how the ferrule 10 is arranged in the center of the housing 20.
- FIG. 11B is an explanatory diagram showing how the ferrule 10 is displaced with respect to the center of the housing 20.
- the ferrule 10 is configured to be slidable with respect to the housing 20. Therefore, a gap C is required between the ferrule 10 and the housing 20.
- the position of the ferrule 10 may be biased to one side in the width direction with respect to the center of the housing 20, and the position of the ferrule 10 in the width direction varies. It will occur. Then, if there is a variation in the position of the ferrule 10 in the width direction, as shown in FIG. 11B, the ferrules are butted against each other from a state of being displaced in the width direction with respect to the ferrule of the mating connector, and as a result, the ferrules are connected.
- the ferrule 10 is adjusted to an appropriate position so that the ferrule 10 is positioned at the center in the width direction of the housing 20. ..
- the appropriate position of the ferrule 10 is not limited to the center of the housing 20. This point will be described below.
- FIG. 12A is an explanatory diagram of a mechanism in which the position shift of the ferrule 10 occurs.
- FIG. 12B is an explanatory diagram of an appropriate position of the ferrule 10.
- the diameter D2 of the guide hole 11 is formed to be larger than the diameter D1 of the guide pin 111 (D2> D1), and a gap is formed between the guide hole 11 and the guide pin 111.
- each ferrule 10 is pressed toward the other ferrule with the inclined end faces 13 attached to each other.
- the ferrules 10 are displaced so as to slide along the inclined end face 13 as shown by the black arrows in the drawing, and the ferrules 10 are displaced in the vertical direction (as shown in FIG. 12B).
- the central axes of the guide holes 11 are displaced in the vertical direction). Therefore, the fiber holes 12 of the ferrule 10 (not shown in FIG.
- the fiber hole 12 of the ferrule 10 (not shown in FIG. 12B) is arranged so as to be offset in the vertical direction by an offset amount corresponding to (D2-D1) / 2 from the central axis of the guide hole 11. (The amount of deformation of the guide pin 111 with respect to the shear stress may be further added to the offset amount).
- the ferrule 10 may not shift up and down as much as the amount expected in advance due to the frictional force acting between the end faces 13. be.
- the optical axes of the optical fibers may be displaced from each other, and the transmission loss of the optical signal may increase.
- the ferrule 10 is closer to the protruding side of the inclined end surface 13 with respect to the housing 20 (see FIG. 12B). , Adjust the ferrule 10 to an appropriate position.
- the appropriate position of the ferrule 10 is not limited to the center of the housing 20, but may be a position shifted to the protruding side of the inclined end face 13.
- FIG. 3 is an orthographic projection of the cap 50 in each direction.
- FIG. 4 is a perspective view of the cap 50.
- 5A and 5B are explanatory views showing the internal structure of the cap 50.
- 6A and 6B are explanatory views in a state where the cap 50 is attached to the optical connector 1.
- the cap 50 is a member (cap for optical connector) that protects the optical connector 1.
- the cap 50 is a member that covers the end surface 13 of the ferrule 10 protruding from the housing 20 and the side surface of the ferrule 10 protruding from the housing 20.
- the cap 50 can be attached to and detached from the tip end portion (front portion) of the optical connector 1.
- the tip of the ferrule 10 protruding from the opening of the housing 20 is covered with the cap 50, whereby the ferrule 10 is protected.
- the cap 50 of the present embodiment includes a main body portion 50A, a housing contact portion 54, and a ferrule contact portion 55.
- the main body 50A constitutes the main body of the cap 50.
- the main body portion 50A can be attached to the optical connector 1 and covers the end surface 13 of the ferrule 10 protruding from the housing 20 and the side surface of the ferrule 10 protruding from the housing 20.
- the cap 50 (main body portion 50A) has a tip wall 51 and a side wall 52.
- the tip wall 51 is a portion (front wall portion) on the tip side (front side) of the cap 50 (main body portion 50A).
- the tip wall 51 is provided with a recess 51A for accommodating the guide pin 111.
- the side wall 52 is a portion constituting the side surface of the cap 50 (main body portion 50A).
- the side wall 52 is a portion constituting the outer periphery of the cap 50, and is a portion (surrounding portion) surrounding the tip end portion of the optical connector 1.
- the side wall 52 is composed of an upper wall portion 52A, a lower wall portion 52B facing the upper wall portion 52A, and left and right side wall portions 52C connecting the upper wall portion 52A and the lower wall portion 52B.
- the cap 50 has a housing portion 53.
- the accommodating portion 53 is a portion accommodating the tip end portion of the optical connector 1, and is composed of a space surrounded by the tip end wall 51 and the side wall 52.
- the cap 50 of the present embodiment has a housing contact portion 54, a ferrule contact portion 55, a slope portion 57, and a pressing portion 58.
- the housing contact portion 54 is a portion that comes into contact with the housing 20 inside the main body portion 50A.
- the housing contact portion 54 is mainly composed of an inner surface of the side wall 52 (a surface on the side of the accommodating portion 53).
- the configuration of the housing contact portion 54 is not limited to this.
- the cap 50 is attached to the optical connector 1 by the housing contact portion 54 formed on the inner surface of the side wall 52 coming into contact with (in other words, fitting) the outer periphery of the housing 20.
- the housing contact portion 54 is fitted so that the cap 50 slides with respect to the housing 20 when a predetermined pressing force (corresponding to the pressing force for the floating mechanism 40 to press the ferrule 10) is received from the floating ferrule 10. It is desirable that the resultant force comes into contact with the housing 20.
- a predetermined pressing force corresponding to the pressing force for the floating mechanism 40 to press the ferrule 10.
- the ferrule contact portion 55 is a portion that comes into contact with the side surface of the ferrule 10.
- the ferrule contact portion 55 comes into contact with the side surface of the ferrule 10 when the housing contact portion 54 contacts the housing 20 (that is, when the cap 50 is attached to the optical connector 1).
- the ferrule contact portion 55 pushes the ferrule 10 in a predetermined direction, whereby the position of the ferrule 10 with respect to the housing 20 is appropriately adjusted. That is, the ferrule contact portion 55 is a position adjusting portion that adjusts the position of the ferrule 10 with respect to the housing 20.
- the ferrule contact portion 55 has a shift contact portion 55A and a centering contact portion 55B.
- the ferrule contact portion 55 may have only one of the shift contact portion 55A and the centering contact portion 55B.
- the shift contact portion 55A is a portion that comes into contact with the second side surface 10B (here, the lower surface) of the ferrule 10.
- the shift contact portion 55A is a portion that pushes the second side surface 10B in the direction from the second side surface 10B to the first side surface 10A (here, the upper surface) (here, the direction from the bottom to the top). That is, the shift contact portion 55A is a portion for shifting the ferrule 10 with respect to the housing 20 on the protruding side of the end surface 13.
- the shift contact portion 55A is composed of a surface parallel to the front-rear direction and the width direction (a surface perpendicular to the vertical direction).
- the shift contact portion 55A is not limited to a surface parallel to the front-rear direction and the width direction as long as the second side surface 10B (here, the lower surface) of the ferrule 10 can be pushed, and the shift contact portion 55A is inclined with respect to the front-rear direction, for example. It may be composed of a flat surface, or may be composed of ridges instead of a flat surface.
- the second side surface 10B of the ferrule 10 is pushed in the direction from 10B toward the first side surface 10A (here, the upper surface) (here, the direction from bottom to top).
- the ferrule 10 can be shifted with respect to the housing 20 toward the protruding side (here, the upper side) of the end surface 13.
- the ferrules are butted against each other in a state where the ferrules 10 are shifted so as to be close to the offset amount expected in advance as shown in FIG. 12B.
- the optical axes of the optical fibers can be aligned (the optical axes can be easily aligned), and the transmission loss of the optical signal can be suppressed. That is, in the present embodiment, the ferrule 10 can be adjusted to an appropriate position with respect to the housing 20 by the shift contact portion 55A.
- the key grooves 521 are provided on the upper and lower inner wall surfaces as in the case of the conventional MPO connector cap (if the cap is vertically symmetrically configured), the cap 50 and the optical connector 1 must be oriented vertically. As a result, when the cap 50 is attached to the optical connector 1, the shift contact portion 55A does not come into contact with the second side surface 10B (lower surface) of the ferrule 10, but the first on the opposite side. There is a risk of contact with the side surface 10A (upper surface).
- the key groove 521 is provided only on the inner wall surface of one of the side walls 52 of the cap 50 (main body 50A).
- the cap 50 (main body portion 50A) is provided with only one key groove 521 and has a vertically asymmetrical shape.
- the key 21 of the optical connector 1 is aligned with the key groove 521 of the cap 50 so that the cap 50 and the optical connector 1 are oriented vertically.
- the shift contact portion 55A of the cap 50 can be brought into contact with the second side surface 10B (lower surface) of the ferrule 10.
- the centering contact portion 55B is a portion that comes into contact with the left and right side surfaces of the ferrule 10.
- the centering contact portion 55B has a pair of facing surfaces.
- the centering contact portion 55B can arrange the ferrule 10 at the center of the housing 20 in the width direction (centering).
- the cap 50 when the cap 50 is attached to the optical connector 1, the ferrule 10 is arranged at the center of the cap 50 in the width direction. Therefore, the cap 50 has a symmetrical shape in the width direction (symmetrical shape). ).
- the ferrule 10 when the optical connector 1 with the cap 50 removed is connected to the mating connector, it is possible to prevent the ferrules from being misaligned and connected in the width direction as shown in FIG. 11B.
- the axes can be aligned and the transmission loss of the optical signal can be suppressed. That is, in the present embodiment, the ferrule 10 can be adjusted to an appropriate position with respect to the housing 20 by the centering contact portion 55B.
- the cap 50 of the present embodiment includes a pair of insertion pieces 56 on the left and right sides.
- the insertion piece 56 is a plate-shaped portion inserted between the ferrule 10 and the housing 20 (see FIG. 6B).
- the insertion piece 56 is a cantilever-shaped portion protruding from the tip wall 51 toward the proximal end side (rear side).
- the insertion piece 56 is a plate-shaped portion perpendicular to the width direction (left-right direction), and is arranged with a gap between the insertion piece 56 and the side wall portion 52C.
- the side wall of the housing 20 is inserted between the insertion piece 56 and the side wall portion 52C.
- the inner facing surface of the pair of insertion pieces 56 is the centering contact portion 55B (the outer surface of the pair of insertion pieces 56 is the housing contact portion 54 in contact with the housing 20). ..
- the cap 50 does not have to include the insertion piece 56, and the centering contact portion 55B (ferrule contact portion 55) does not have to be arranged on the insertion piece 56.
- the centering contact portion 55B contacts only the side surface of the ferrule 10 that protrudes from the opening of the housing 20, the contact area between the centering contact portion 55B and the ferrule 10 becomes small. It ends up.
- the centering contact portion 55B contacts not only the side surface of the ferrule 10 that protrudes from the opening of the housing 20 but also the side surface of the base end side of the opening of the housing 20. Therefore, the contact area between the centering contact portion 55B and the ferrule 10 can be increased. This makes it easier to adjust the ferrule 10 to an appropriate position with respect to the housing 20.
- the slope portion 57 is a portion having an inclined surface that can come into contact with the housing 20.
- the slope portion 57 is a portion where the ferrule contact portion 55 (specifically, the shift contact portion 55A) pushes the housing 20 toward the ferrule 10 from the direction opposite to the direction in which the ferrule 10 pushes the second side surface 10B (here, the lower surface). be.
- the slope portion 57 pushes the housing 20 from top to bottom.
- the slope portion 57 is provided at the inner corner between the tip wall portion 51 of the cap 50 and the upper wall portion 52A (side wall 52 provided with the key groove 521).
- the slope portion 57 has an inclined surface such that the vertical distance from the shift contact portion 55A becomes narrower toward the tip end side.
- the cap 50 is attached to the optical connector 1, the shift contact portion 55A is in contact with the ferrule 10, and the slope portion 57 is in contact with the housing 20, and then the cap 50 is further attached to the base end side with respect to the optical connector 1.
- the ferrule 10 and the upper part of the housing 20 are sandwiched between the shift contact portion 55A and the slope portion 57 (described later; see FIG. 7C).
- the ferrule 10 is easily shifted with respect to the housing 20 so as to be closer to the protruding side of the inclined end surface 13 (see FIG. 12B).
- the slope portion 57 is arranged on the tip end side of the key groove 521 and is in contact with the end portion of the key 21 of the housing 20.
- the slope portion 57 comes into contact with the housing 20 at the center in the width direction of the housing 20, and the center in the width direction of the housing 20 can be pushed toward the ferrule 10, so that the housing 20 is tilted in the left-right direction. It can be suppressed and it becomes easier to move straight in the front-back direction.
- the slope portion 57 may be provided at a portion other than the tip of the key groove 521, or the slope portion 57 may come into contact with a portion other than the key 21 of the housing 20.
- the pressing portion 58 is a portion that presses the tip portion of the ferrule 10.
- the pressing portion 58 is composed of a surface perpendicular to the front-rear direction.
- the pressing portion 58 may have another shape as long as it can press the tip portion of the ferrule 10.
- FIG. 7A to 7D are explanatory views of the inside of the cap 50 when the cap is attached. A partially enlarged view is shown on the right side of each figure.
- the shift contact portion 55A becomes the ferrule 10 as shown in FIG. 7A. Facing the second side surface 10B (lower surface) of the above. At this time, the shift contact portion 55A may come into contact with the second side surface 10B of the ferrule 10. However, at this stage, the shift contact portion 55A may not be in contact with the second side surface 10B of the ferrule 10.
- the ferrule 10 floats (the flange portion 15 of the ferrule 10 and the protruding portion 22 of the housing 20 are separated from each other, and as a result, the ferrule 10 with respect to the housing 20. It becomes easy to move).
- the slope portion 57 becomes the housing 20 (detailedly, the key) as shown in FIG. 7C. Contact the end of 21). Since the slope portion 57 is formed of an inclined surface such that the vertical distance from the shift contact portion 55A becomes narrower toward the tip side, the housing 20 moves toward the tip side with respect to the cap 50 (operator). The ferrule 10 and the upper part of the housing 20 are sandwiched between the shift contact portion 55A and the slope portion 57) so that the tip portion of the optical connector 1 is inserted into the accommodating portion 53 of the cap 50.
- the shift contact portion 55A may come into contact with the second side surface 10B of the ferrule 10. can.
- the shift contact portion 55A pushes the second side surface 10B of the ferrule 10
- the slope portion 57 is the shift contact portion.
- the housing 20 is pushed toward the ferrule 10 from the direction opposite to the direction in which the 55A pushes the ferrule 10.
- the ferrule 10 is shifted with respect to the housing 20 so as to be closer to the protruding side of the inclined end face 13.
- the dimension in the front-rear direction between the pressing portion 58 and the base end portion of the slope portion 57 is set to L1.
- the dimension in the front-rear direction between the tip of the ferrule 10 (the part that contacts the pressing portion 58) and the tip of the upper surface of the housing 20 (the part that contacts the slope portion 57; the end of the key 21) is L2.
- the dimension L1 is set shorter than the dimension L2 (L1 ⁇ L2).
- the dimension L2 substantially corresponds to the amount of protrusion of the ferrule 10 from the opening of the housing 20.
- the slope portion 57 does not come into contact with the housing 20 at the stage where the pressing portion 58 and the tip portion of the ferrule 10 come into contact with each other (see FIG. 7B) (slope portion). 57 is not pushing the housing 20). Further, since the dimension L1 is set shorter than the dimension L2, when the slope portion 57 comes into contact with the housing 20, the pressing portion 58 is in a state of pressing the ferrule 10, and the ferrule 10 is in a floating state.
- the slope portion 57 is the housing 20 (specifically, the key). It will come into contact with the end of 21). As a result, the position of the ferrule 10 can be adjusted while the ferrule 10 is easily moved with respect to the housing 20.
- the shift contact portion 55A is in contact with the second side surface 10B of the ferrule 10 while the ferrule 10 is in a non-floating state (that is, in a state where the flange portion 15 of the ferrule 10 is in contact with the protruding portion 22 of the housing 20).
- the slope portion 57 may come into contact with the housing 20 (specifically, the end portion of the key 21).
- the ferrule is due to the frictional force acting between the flange portion 15 and the protrusion 22 as compared with the present embodiment. 10 becomes difficult to move with respect to the housing 20.
- the slope portion 57 comes into contact with the housing 20 (specifically, the end of the key 21), and the shift contact portion 55A is the second ferrule 10. It is desirable to make contact with the side surface 10B. That is, it is desirable that the dimension L1 is shorter than the dimension L2 as in the present embodiment.
- the operator attaches the cap 50 to the optical connector 1 and then releases the finger from the cap 50.
- the cap 50 receives a pressing force from the floating ferrule 10 due to the force of the floating mechanism 40 pressing the ferrule 10 toward the tip side.
- the cap 50 moves (slides) toward the tip end side with respect to the housing 20, and shifts from the state shown in FIG. 7C to the state shown in FIG. 7D.
- the ferrule 10 changes from a floating state to a non-floating state (a state in which the flange portion 15 of the ferrule 10 and the protruding portion 22 of the housing 20 are in contact with each other).
- the ferrule 10 is in a floating state and the position of the ferrule 10 is adjusted, and then the ferrule 10 is in a non-floating state (a state in which the flange portion 15 of the ferrule 10 and the protruding portion 22 of the housing 20 are in contact with each other). Therefore, when the cap 50 is left attached, the position of the ferrule 10 with respect to the housing 20 is unlikely to shift due to contact or impact. Therefore, in the present embodiment, it becomes easy to keep the ferrule 10 in an appropriate position even after the cap 50 is removed from the optical connector 1.
- the optical connector 1 After removing the cap 50 from the optical connector 1, the optical connector 1 will be connected to the mating connector.
- the ferrule 10 is adjusted to an appropriate position when the cap 50 is attached, when the optical connector 1 is connected to the mating connector, the misalignment of the optical axes between the connected optical fibers is suppressed. Therefore, the transmission loss of the optical signal can be suppressed.
- FIG. 8 is an explanatory diagram of a state in which the cap 50 of the second embodiment is attached to the optical connector 1. Also in the second embodiment, the cap 50 has a main body portion 50A, a housing contact portion 54, and a ferrule contact portion 55.
- the end surface 13 of the ferrule 10 is inclined, and the upper surface (first side surface 10A) of the side surfaces of the ferrule 10 is larger than the lower surface (the surface opposite to the upper surface; the second side surface 10B). It protrudes from the housing 20.
- the ferrule contact portion 55 has a shift contact portion 55A, and the shift contact portion 55A contacts the second side surface 10B of the ferrule 10, and the second side surface 10B to the first side surface Push the second side surface 10B in the direction toward 10A (here, the upper surface) (here, the direction from the bottom to the top).
- the ferrule 10 can be shifted to the protruding side (here, the upper side) of the end surface 13 with respect to the housing 20, and the ferrule 10 is adjusted to an appropriate position with respect to the housing 20. Can be done. Further, as a result, when the optical connector 1 with the cap 50 removed is connected to the other party connector, the optical axes of the optical fibers can be aligned with each other, and the transmission loss of the optical signal can be suppressed.
- the cap 50 of the second embodiment is not provided with the slope portion 57. However, even if the cap 50 does not have the slope portion 57, as shown in FIG. 8, the ferrule contact portion 55 comes into contact with the side surface of the ferrule 10 (here, the second side surface 10B), so that the protruding side of the end surface 13 is formed.
- the ferrule 10 can be shifted to (here, the upper side) with respect to the housing 20, and the ferrule 10 can be adjusted to an appropriate position with respect to the housing 20.
- the ferrule contact portion 55 does not have to include the centering contact portion 55B.
- the cap 50 does not include the centering contact portion 55B, even if the cap 50 is attached to the optical connector 1, the position of the ferrule 10 in the width direction cannot be adjusted.
- the ferrule contact portion 55 has the shift contact portion 55A, it is possible to adjust the vertical position of the ferrule 10.
- the ferrule contact portion 55 may include the centering contact portion 55B.
- FIG. 9 is an explanatory diagram of a state in which the cap 50 of the third embodiment is attached to the optical connector 1. Also in the third embodiment, the cap 50 has a main body portion 50A, a housing contact portion 54, and a ferrule contact portion 55.
- the ferrule contact portion 55 has a centering contact portion 55B.
- the centering contact portion 55B of the third embodiment has a pair of facing surfaces as in the first embodiment, and when the cap 50 is attached to the optical connector 1 as shown in FIG. 9 (housing contact portion).
- the ferrule 10 is placed between the pair of facing surfaces.
- the ferrule 10 can be arranged (centered) at the center in the width direction of the housing 20, and the ferrule 10 can be adjusted to an appropriate position with respect to the housing 20.
- the optical axes of the optical fibers can be aligned with each other, and the transmission loss of the optical signal can be suppressed.
- the cap 50 does not include the insertion piece 56 to be inserted between the ferrule 10 and the housing 20. Therefore, in the third embodiment, the pair of facing surfaces of the left and right side wall portions 52C of the side wall 52 of the cap 50 becomes the ferrule contact portion 55 (specifically, the centering contact portion 55B). As described above, the cap 50 does not have to include the insertion piece 56, and the centering contact portion 55B (ferrule contact portion 55) does not have to be arranged on the insertion piece 56.
- the end surface 13 of the ferrule 10 is not inclined and is composed of a surface perpendicular to the optical axis of the optical fiber.
- the ferrule contact portion 55 may not include the shift contact portion 55A. Even when the end surface 13 of the ferrule 10 is inclined, the ferrule contact portion 55 may include only the centering contact portion 55B without the shift contact portion 55A.
- FIG. 10 is an explanatory diagram of the cap 50 of the fourth embodiment.
- the cap 50 of the fourth embodiment has a main body portion 50A, a housing contact portion 54 (not shown), and a ferrule contact portion 55.
- the housing contact portion 54 of the fourth embodiment has a latch portion 59.
- the latch portion 59 is a claw-shaped portion for hooking on the locking portion 23 of the housing 20. In the fourth embodiment, the latch portion 59 is caught by the locking portion 23 of the housing 20 to prevent the cap 50 from falling off.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
Description
図1Aは、キャップ付き光コネクタ100の斜視図である。図1Bは、キャップ50を光コネクタ1から外した状態の斜視図である。図2は、キャップ付き光コネクタ100の分解図である。
本実施形態の光コネクタ1は、JIS C 5982やIEC 61754-7に制定されるMPO(Multifiber Push-On)光コネクタである。なお、光コネクタは、MPO光コネクタに限られるものではなく、他の光コネクタでも良い。光コネクタ1は、複数の光ファイバを一括接続可能な光コネクタである。光コネクタ1は、フェルール10と、ハウジング20と、フローティング機構40とを有する。
図11A及び図11Bは、フェルール10の位置ずれの説明図である。図11Aは、フェルール10がハウジング20の中心に配置された様子の説明図である。図11Bは、フェルール10がハウジング20の中心に対してズレた様子の説明図である。
図3は、キャップ50の各方向の正投影図である。図4は、キャップ50の斜視図である。図5A及び図5Bは、キャップ50の内部構造を示す説明図である。図6A及び図6Bは、光コネクタ1にキャップ50を装着した状態の説明図である。
側壁52は、キャップ50(本体部50A)の側面を構成する部位である。側壁52は、キャップ50の外周を構成する部位であり、光コネクタ1の先端部を囲繞する部位(囲繞部)である。側壁52は、上壁部52Aと、上壁部52Aと対向する下壁部52Bと、上壁部52Aと下壁部52Bとを連結する左右の側壁部52Cと、によって構成されている。また、キャップ50は、収容部53を有する。収容部53は、光コネクタ1の先端部を収容する部位であり、先端壁51と側壁52とによって囲まれた空間で構成される。
図8は、第2実施形態のキャップ50を光コネクタ1に装着した状態の説明図である。第2実施形態においても、キャップ50は、本体部50Aと、ハウジング接触部54と、フェルール接触部55とを有している。
図9は、第3実施形態のキャップ50を光コネクタ1に装着した状態の説明図である。第3実施形態においても、キャップ50は、本体部50Aと、ハウジング接触部54と、フェルール接触部55とを有している。
図10は、第4実施形態のキャップ50の説明図である。第4実施形態のキャップ50は、本体部50Aと、不図示のハウジング接触部54と、フェルール接触部55とを有している。
上記の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、変更・改良され得ると共に、本発明には、その等価物が含まれることは言うまでもない。
10A 第1側面、10B 第2側面、
11 ガイド穴、111 ガイドピン、
12 ファイバ穴、13 端面、
14 本体部、15 鍔部、17 ピンクランプ、
20 ハウジング、21 キー、
22 突出部、23 係止部、24 窓部、
30 カップリング、31 バネ、
40 フローティング機構、41 スプリング、
42 スプリングプッシュ、421 腕部、421A 爪部、
43 ブーツ、
50 キャップ、50A 本体部、
51 先端壁、51A 凹部、
52 側壁、52A 上壁部、52B 下壁部、52C 側壁部、
521 キー溝、53 収容部、
54 ハウジング接触部、55 フェルール接触部、
55A シフト用接触部、55B センタリング用接触部、
56 挿入片、57 スロープ部、
58 押圧部、59 ラッチ部、
100 キャップ付き光コネクタ
Claims (8)
- フェルールと、前記フェルールを摺動可能に収容するハウジングとを備えた光コネクタに装着可能なキャップであって、
前記光コネクタに装着可能であり、前記ハウジングから突出する前記フェルールの接続端面と、前記ハウジングから突出する前記フェルールの側面とを覆う本体部と、
前記本体部の内部で前記ハウジングと接触するハウジング接触部と、
前記ハウジング接触部が前記ハウジングに接触した状態で前記フェルールの前記側面と接触するフェルール接触部と、
を有するキャップ。 - 請求項1に記載のキャップであって、
前記接続端面が傾斜端面で構成され、前記フェルールの前記側面のうちの第1側面は、当該第1側面とは反対側の第2側面よりも前記ハウジングから突出しており、
前記フェルール接触部は、前記第2側面に接触し、前記第2側面から前記第1側面に向かう方向に前記第2側面を押すことを特徴とするキャップ。 - 請求項2に記載のキャップであって、
前記ハウジングと接触可能な傾斜面を有するスロープ部を更に備え、
前記スロープ部は、前記フェルール接触部が前記第2側面を押す方向とは逆方向から前記ハウジングを前記フェルールに向かって押すことを特徴とするキャップ。 - 請求項3に記載のキャップであって、
前記フェルールの先端部を押圧可能な押圧部を更に備え、
前記押圧部が前記フェルールの前記先端部を押圧した状態で、
前記フェルール接触部が、前記第2側面を押すとともに、
前記スロープ部が、前記フェルール接触部が前記第2側面を押す方向とは逆方向から前記ハウジングを前記フェルールに向かって押すことを特徴とするキャップ。 - 請求項4に記載のキャップであって、
前記押圧部と前記スロープ部の基端部との間におけるキャップ着脱方向における寸法をL1とし、前記フェルールの前記先端部と前記ハウジングの先端部との間の前記キャップ着脱方向の寸法をL2としたとき、L1はL2よりも短いことを特徴とするキャップ。 - 請求項3~5のいずれかに記載のキャップであって、
前記キャップの1つの内壁面に、前記光コネクタのキーに合わせるためのキー溝が設けられていることを特徴とするキャップ。 - 請求項1~6のいずれかに記載のキャップであって、
前記フェルール接触部は、幅方向に対向する一対の対向面を有しており、
前記ハウジング接触部が前記ハウジングに接触した状態で前記フェルールが一対の前記対向面の間に配置されることを特徴とするキャップ。 - 請求項7に記載のキャップであって、
前記対向面は、前記フェルールと前記ハウジングとの間に挿入される挿入片に設けられることを特徴とするキャップ。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022563562A JP7410332B2 (ja) | 2020-11-17 | 2021-06-07 | キャップ |
| CN202180056954.2A CN116057440B (zh) | 2020-11-17 | 2021-06-07 | 帽 |
| US18/024,571 US12405428B2 (en) | 2020-11-17 | 2021-06-07 | Cap |
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| JP2020191085 | 2020-11-17 | ||
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| WO2022107366A1 true WO2022107366A1 (ja) | 2022-05-27 |
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| PCT/JP2021/021530 Ceased WO2022107366A1 (ja) | 2020-11-17 | 2021-06-07 | キャップ |
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| JP (1) | JP7410332B2 (ja) |
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| WO2025018192A1 (ja) * | 2023-07-18 | 2025-01-23 | 住友電工オプティフロンティア株式会社 | 光コネクタおよび光接続構造 |
| EP4540643A4 (en) * | 2022-06-17 | 2026-04-29 | Commscope Technologies Llc | IMPROVED CONNECTOR INTERFACE FIBER OPTIC CONNECTOR DUST CAP |
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Also Published As
| Publication number | Publication date |
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| JP7410332B2 (ja) | 2024-01-09 |
| CN116057440B (zh) | 2025-06-06 |
| JPWO2022107366A1 (ja) | 2022-05-27 |
| US20230333326A1 (en) | 2023-10-19 |
| US12405428B2 (en) | 2025-09-02 |
| CN116057440A (zh) | 2023-05-02 |
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