CN110954996A - MPO connector and optical cable assembly - Google Patents
MPO connector and optical cable assembly Download PDFInfo
- Publication number
- CN110954996A CN110954996A CN201911167149.8A CN201911167149A CN110954996A CN 110954996 A CN110954996 A CN 110954996A CN 201911167149 A CN201911167149 A CN 201911167149A CN 110954996 A CN110954996 A CN 110954996A
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- Prior art keywords
- crimping
- sleeve
- hole
- mpo connector
- adapter sleeve
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- 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
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- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4471—Terminating devices ; Cable clamps
Abstract
The invention relates to an MPO connector and an optical cable assembly. The MPO connector comprises a shell, a retaining seat, a crimping sleeve and a protective tail sleeve; the holding seat is used for being fixed in the shell, a crimping part is arranged at the rear part of the holding seat, and the crimping part is sleeved at the front end of the crimping sleeve and is crimped and fixed; the protective tail sleeve is sleeved at the rear end of the crimping sleeve to protect the optical cable; the MPO connector also comprises an adapter sleeve, wherein the adapter sleeve is provided with an axial through hole for the optical fiber to pass through; the rear end of the retaining seat is provided with an inserting hole, and the front end of the adapter sleeve is inserted into the inserting hole and fixed in the inserting hole; the crimping part is formed by the rear end part of the adapter sleeve, and the bearing capacity of the material selected by the adapter sleeve on the crimping acting force is larger than that of the material selected by the retaining base on the crimping acting force. The scheme solves the problem that the crimping part of the existing MPO connector is easily crushed by the crimping sleeve.
Description
Technical Field
The invention relates to an MPO connector and an optical cable assembly.
Background
MPO connectors are increasingly being used in optical communication systems. As shown in fig. 1, the conventional MPO connector, such as the MPO/MTP male optical fiber connector disclosed in the background of the chinese utility model patent with the publication number CN202453542U, includes: the housing 201, ferrule assembly 202, holder 208, crimp sleeve 211 (i.e., the coupling ring of the above-mentioned patent), and protective boot 210, the male optical fiber connector 200 is used to connect with an optical cable 400 to form a cable assembly. Wherein the ferrule assembly 202 includes a ferrule 203, a protective sleeve 204 for protecting a plurality of optical fibers, a guide pin 205 passing through the ferrule 203, and a mount 206 for mounting the guide pin 205. The holder 208 holds the ferrule assembly 202 in the housing 201 by the spring 207, and a crimp portion 209 (i.e., a joint portion in the above-mentioned patent) is provided at a rear end thereof, and a crimp sleeve 211 is used to connect with the crimp portion 209. During assembly, the retaining seat 208, the crimping sleeve 211 and the protective tail sleeve 210 are firstly sleeved on the optical cable 400, the optical fiber 401 at the front end of the optical cable 400 is firstly connected with the ferrule assembly 202 and is installed in the shell 201, then the retaining seat 208 is pushed to move forwards under the action of the spring 207 in the shell, the retaining seat 208 is fixed on the shell 201 by virtue of a front end connecting arm, then tensile elements (not shown in the figure) in the optical cable 400 are uniformly distributed on the outer circle of the crimping part 209 along the circumference, the crimping sleeve 211 is sleeved, the front end of the crimping sleeve 211 is fixedly crimped with the crimping part 209, the rear end of the crimping sleeve 211 is fixedly crimped with the outer skin of the optical cable, and finally the protective tail sleeve 210 is sleeved on the rear end of the crimping sleeve 211.
However, the assembly of the holder 208 and the housing 201 is realized by a snap structure, and the holder 208 needs to generate a certain elastic deformation during assembly, so the holder 208 is generally made of plastic. Thus, when the front end of the crimping sleeve 211 is crimped and fixed with the crimping portion 209, the crimping portion 209 is likely to be broken or has cracks that are not easily recognized, and when the crimping sleeve is used for a long time or is subjected to external force (a straight pulling force in the front-rear direction and/or a side pulling force having an angle with the front-rear direction), the cracks are further deteriorated and a fracture failure occurs.
In addition, in some special cases, the MPO connector needs to be adapted to an optical cable with a larger wire diameter, so that the diameter of the crimping portion 209 is correspondingly increased, which causes the strength of the crimping portion 209 to be reduced, and the possibility of fracture is higher.
Disclosure of Invention
The invention aims to provide an MPO connector, which solves the problem that a crimping part is easily crushed by a crimping sleeve of the existing MPO connector; meanwhile, another object of the present invention is to provide a cable assembly which solves the problem of damage of the conventional cable assembly caused by crushing of the crimping portion by the crimping sleeve.
The technical scheme adopted by the MPO connector is as follows.
The MPO connector comprises a shell, a retaining seat, a crimping sleeve and a protective tail sleeve;
the holding seat is used for being fixed in the shell, a crimping part is arranged at the rear part of the holding seat, and the crimping part is sleeved at the front end of the crimping sleeve and is crimped and fixed;
the protective tail sleeve is sleeved at the rear end of the crimping sleeve to protect the optical cable;
the MPO connector also comprises an adapter sleeve;
the adapter sleeve is provided with an axial through hole, and the optical fiber passes through the axial through hole;
the rear end of the retaining seat is provided with an inserting hole, and the front end of the adapter sleeve is inserted into the inserting hole and fixed in the inserting hole;
the crimping part is formed by the rear end part of the adapter sleeve, and the bearing capacity of the material selected by the adapter sleeve on the crimping acting force is larger than that of the material selected by the retaining base on the crimping acting force.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the MPO connector also comprises the adapter sleeve, and the axial through hole in the adapter sleeve does not influence the normal penetration of the optical fiber; and the spliced eye that keeps the seat rear end can supply the front end of switching cover to insert, the rear end of switching cover forms crimping portion and supplies crimping cover to establish and the crimping, because the material that the switching cover chose for use is greater than the material that the keeping seat chooseed for use to the bearing capacity of crimping effort, consequently, can bear bigger crimping effort, compared with the prior art, can avoid crimping cover to crush crimping portion, after the switching cover is fixed in the spliced eye, can realize the reliable connection of MPO connector and optical cable, structural strength is good, be favorable to guaranteeing the assembly quality.
As a preferred technical scheme, the MPO connector further comprises a locking pin, the locking pin simultaneously penetrates through the retaining seat and the adapter sleeve along the radial direction of the insertion hole, and the adapter sleeve is fixed on the hole wall in the insertion hole through the locking pin.
The technical scheme has the beneficial effects that: the lock nails are adopted for connection, so that the structure strength is high and the assembly is convenient.
As a preferred technical scheme, a set screw hole is formed in the hole wall of the insertion hole of the adapter sleeve, the lock nail is a set screw assembled in the set screw hole, a screw fitting hole or a screw fitting groove is formed in the sleeve wall of the adapter sleeve, and the front end of the set screw extends into the screw fitting hole or the screw fitting groove.
The technical scheme has the beneficial effects that: the set screw technology is mature, easy dismounting, and screw adaptation hole or screw adaptation groove can make the switching cover can bear bigger fore-and-aft direction effort and moment of torsion, guarantee to connect the reliability better.
As a preferred technical solution, the set screws are provided in pairs, and the two set screws in the pair are symmetrically arranged.
The technical scheme has the beneficial effects that: by adopting the scheme, the stress is uniform, and the connection strength is higher.
As a preferable technical solution, thickened portions are provided on both sides of the holding base in the width direction, and the lock pin is provided on the thickened portions of the holding base.
The technical scheme has the beneficial effects that: the structural strength of the retaining base can be guaranteed by arranging the thickened part, so that the connection reliability of the adapter sleeve is improved.
As a preferred technical scheme, the outer side surface of the thickened part is provided with a slot, and the slot enables the two sides of the thickened part to form convex ribs.
The technical scheme has the beneficial effects that: the arrangement of the grooves and the convex ribs can reduce the weight of the retaining base under the condition of not influencing the structural strength, reduce the material usage amount and save the cost.
As an optimal technical scheme, the lateral surface at thickening position is the inclined plane, and the thickening thickness of the front end at thickening position is greater than the thickening thickness of rear end, the fluting sets up at the front end, the lock pin sets up at the rear end.
The technical scheme has the beneficial effects that: the connector is attractive in structure and can be reduced in size under the condition of ensuring strength.
As a preferred technical scheme, a circumferential rotation stopping structure is arranged between the inserting hole and the adapter sleeve.
The technical scheme has the beneficial effects that: the circumferential rotation stopping structure is arranged, so that the lateral pulling resistance and the torsion resistance of the MPO connector can be guaranteed, and the reliability is higher.
As a preferred technical scheme, the wall of the insertion hole is provided with a rotation stopping protrusion, and the rotation stopping protrusion extends along the axial direction of the insertion hole;
the peripheral surface of the switching sleeve is provided with a rotation stopping groove, and the rotation stopping protrusion is matched with the rotation stopping groove to form the circumferential rotation stopping structure.
The technical scheme has the beneficial effects that: the structure is convenient to process and has good rotation stopping effect.
The technical scheme adopted by the optical cable assembly is as follows.
The optical cable assembly comprises an optical cable and an MPO connector, wherein the MPO connector is connected to the end part of the optical cable and comprises a shell, a retaining seat, a crimping sleeve and a protection tail sleeve;
the holding seat is used for being fixed in the shell, a crimping part is arranged at the rear part of the holding seat, and the crimping part is sleeved at the front end of the crimping sleeve and is crimped and fixed;
the protective tail sleeve is sleeved at the rear end of the crimping sleeve to protect the optical cable;
the MPO connector also comprises an adapter sleeve;
the adapter sleeve is provided with an axial through hole, and the optical fiber passes through the axial through hole;
the rear end of the retaining seat is provided with an inserting hole, and the front end of the adapter sleeve is inserted into the inserting hole and fixed in the inserting hole;
the crimping part is formed by the rear end part of the adapter sleeve, and the bearing capacity of the material selected by the adapter sleeve on the crimping acting force is larger than that of the material selected by the retaining base on the crimping acting force.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the MPO connector also comprises the adapter sleeve, and the axial through hole in the adapter sleeve does not influence the normal penetration of the optical fiber; and the spliced eye that keeps the seat rear end can supply the front end of switching cover to insert, the rear end of switching cover forms crimping portion and supplies crimping cover to establish and the crimping, because the bearing capacity of the material that the switching cover chooseed for use to the crimping effort is greater than the bearing capacity of the material that the keeping seat chooseed for use to the crimping effort, consequently, can bear bigger crimping effort, compared with the prior art, can avoid crimping cover to crush crimping portion, after the switching cover is fixed in the spliced eye, can realize the reliable connection of MPO connector and optical cable, the damage problem that current optical cable subassembly leads to because crimping cover crushes the crimping portion has been solved, structural strength is good, be favorable to guaranteeing assembly quality.
As a preferred technical scheme, the MPO connector further comprises a locking pin, the locking pin simultaneously penetrates through the retaining seat and the adapter sleeve along the radial direction of the insertion hole, and the adapter sleeve is fixed on the hole wall in the insertion hole through the locking pin.
The technical scheme has the beneficial effects that: the lock nails are adopted for connection, so that the structure strength is high and the assembly is convenient.
As a preferred technical scheme, a set screw hole is formed in the hole wall of the insertion hole of the adapter sleeve, the lock nail is a set screw assembled in the set screw hole, a screw fitting hole or a screw fitting groove is formed in the sleeve wall of the adapter sleeve, and the front end of the set screw extends into the screw fitting hole or the screw fitting groove.
The technical scheme has the beneficial effects that: the set screw technology is mature, easy dismounting, and screw adaptation hole or screw adaptation groove can make the switching cover can bear bigger fore-and-aft direction effort and moment of torsion, guarantee to connect the reliability better.
As a preferred technical solution, the set screws are provided in pairs, and the two set screws in the pair are symmetrically arranged.
The technical scheme has the beneficial effects that: by adopting the scheme, the stress is uniform, and the connection strength is higher.
As a preferable technical solution, thickened portions are provided on both sides of the holding base in the width direction, and the lock pin is provided on the thickened portions of the holding base.
The technical scheme has the beneficial effects that: the structural strength of the retaining base can be guaranteed by arranging the thickened part, so that the connection reliability of the adapter sleeve is improved.
As a preferred technical scheme, the outer side surface of the thickened part is provided with a slot, and the slot enables the two sides of the thickened part to form convex ribs.
The technical scheme has the beneficial effects that: the arrangement of the grooves and the convex ribs can reduce the weight of the retaining base under the condition of not influencing the structural strength, reduce the material usage amount and save the cost.
As an optimal technical scheme, the lateral surface at thickening position is the inclined plane, and the thickening thickness of the front end at thickening position is greater than the thickening thickness of rear end, the fluting sets up at the front end, the lock pin sets up at the rear end.
The technical scheme has the beneficial effects that: the connector is attractive in structure and can be reduced in size under the condition of ensuring strength.
As a preferred technical scheme, a circumferential rotation stopping structure is arranged between the inserting hole and the adapter sleeve.
The technical scheme has the beneficial effects that: the circumferential rotation stopping structure is arranged, so that the lateral pulling resistance and the torsion resistance of the MPO connector can be guaranteed, and the reliability is higher.
As a preferred technical scheme, the wall of the insertion hole is provided with a rotation stopping protrusion, and the rotation stopping protrusion extends along the axial direction of the insertion hole;
the peripheral surface of the switching sleeve is provided with a rotation stopping groove, and the rotation stopping protrusion is matched with the rotation stopping groove to form the circumferential rotation stopping structure.
The technical scheme has the beneficial effects that: the structure is convenient to process and has good rotation stopping effect.
Drawings
FIG. 1 is a schematic view of a prior art MPO connector;
FIG. 2 is a schematic external view of a first embodiment of the MPO connector of the present invention;
FIG. 3 is an exploded view of the MPO connector of FIG. 2;
FIG. 4 is a cross-sectional view of the MPO connector of FIG. 2;
FIG. 5 is a perspective view of the holder of FIG. 3;
FIG. 6 is a perspective view of the adapter sleeve of FIG. 3;
FIG. 7 is a cross-sectional view of one embodiment of a cable assembly of the present invention with the protective boot omitted.
The names of the components corresponding to the corresponding reference numerals in the drawings are:
200-male optical fiber connector, 201-shell, 202-ferrule assembly, 203-ferrule, 204-protective sleeve, 205-guide pin, 206-mounting seat, 207-spring, 208-holding seat, 209-crimping part, 210-protective tail sleeve, 211-crimping sleeve, 400-optical cable, 401-optical fiber;
10-shell, 20-ferrule assembly, 30-spring, 40-retaining base, 41-retaining base body, 42-connecting arm, 43-inserting hole, 44-stopping step, 45-thickening part, 46-slotting, 47-convex rib, 48-set screw hole, 49-rotation stopping groove, 50-set screw, 60-adapter sleeve, 61-crimping part, 62-rotation stopping protrusion, 63-screw adapting hole, 70-crimping sleeve, 80-protecting tail sleeve and 90-optical cable.
Detailed Description
The invention will be further explained with reference to the drawings.
An embodiment of the MPO connector of the present invention, as shown in fig. 2, 3 and 4, includes a housing 10, a ferrule assembly 20, a spring 30, a holder 40, an adapter sleeve 60, a crimp sleeve 70 and a protective tail sleeve 80. The structure of the housing 10, the ferrule assembly 20 and the crimp sleeve 70 is shown in fig. 2 and 4, and the components can be the structure of the prior art, which will not be described in detail herein. In addition, for the sake of clarity, in this embodiment, the end of the MPO connector where the protection tail cover 80 is provided is taken as the rear end, the end of the MPO connector where the ferrule assembly 20 is provided is taken as the front end, and the width direction of the MPO connector housing 10 is taken as the left-right direction.
The protective tail sleeve 80 of the MPO connector is used to be sleeved on the rear end of the crimping sleeve 70 to protect the optical cable, and the structure thereof is also prior art and will not be described in detail herein.
As shown in fig. 2 and 4, the main difference between the MPO connector of the present embodiment and the prior art is that an adapter sleeve 60 is provided, and the adapter sleeve 60 is fixed to the rear end of the holder 40 to form a press-contact portion 61 for press-contacting the press-contact sleeve 70. The invention will be further explained below with respect to the above-mentioned main differences.
The holder 40 in the present embodiment is structured as shown in fig. 5, and includes a holder main body 41 and a connecting arm 42. The same as the existing structure, there are two connecting arms 42, which are disposed at the front end of the retaining base main body 41, and the outside of each connecting arm 42 in the left-right direction is provided with a clamping protrusion, which is used to fit with a clamping groove on the inner housing of the housing 10, so as to realize the connection and fixation of the retaining base 40 and the inner housing. The holder body 41 has a trapezoidal structure, and has a fiber through hole extending in the front-rear direction at the center thereof, through which the optical fiber passes. Meanwhile, the optical fiber through hole is a stepped hole, the front section of the stepped hole is a large-diameter section, and the large-diameter section forms a backward stopping step 44; the rear section of the stepped hole forms an insertion hole 43, and the insertion hole 43 is used for inserting the front end of the adapter sleeve 60.
As shown in fig. 5, the holder main body 41 has thickened portions 45 on both sides in the left-right direction, and the thickened portions 45 correspond to the hole walls of the optical fiber holes, i.e., the left and right sides of the hole walls are thicker. The thickened thickness of the front end of the thickened part 45 is larger than that of the rear end, so that the outer side surface of the thickened part 45 in the left and right directions is an inclined surface. The outer side surface of the thickened portion 45 is provided with a slot 46, and the slot 46 is arranged at the front end, so that convex ribs 47 are formed on two sides of the thickened portion 45. The left side and the right side of the rear end of the thickened part 45 are respectively provided with a fastening screw hole 48, a fastening screw 50 is arranged in the fastening screw hole 48, and the fastening screw 50 is used for fixing the adapter sleeve 60 in the plug hole 43. The end of the set screw 50 is provided with a straight groove for matching with a corresponding tool to realize screwing of the set screw 50, thereby realizing disassembly and assembly of the set screw 50. In addition, the wall of the insertion hole 43 is provided with four rotation stopping grooves 49 extending along the front and the back, and the rotation stopping grooves 49 are uniformly distributed along the circumferential direction.
As shown in fig. 6, the adapter sleeve 60 is a sleeve structure, and has an axial through hole in the center, which is through from front to back and through which the optical fiber passes. The rear end of the adapter sleeve 60 forms a crimping part 61 for the crimping sleeve 70 to be sleeved and crimped and fixed, the adapter sleeve 60 is made of a material capable of bearing the crimping acting force when the crimping sleeve 70 is crimped, and the bearing capacity of the material selected for the adapter sleeve 60 on the crimping acting force is larger than that of the material selected for the retaining base 40 on the crimping acting force. Of course, according to the requirement on the crimping acting force during product assembly, the material can be selected according to the actual situation, the material with lower strength can be selected when the crimping acting force is lower, and the material with higher strength, such as a composite material with higher strength, can be selected when the crimping acting force is higher. The front end of adapter sleeve 60 is equipped with the protruding 62 that splines that extend around, and the protruding 62 that splines is along circumference equipartition for it forms the circumference structure that splines to cooperate with the recess 49 that splines that sets up on the spliced eye 43 on the holding seat 40, and when the optical cable received the side direction pulling force, the protruding 62 that splines and the recess 49 that splines can avoid adapter sleeve 60 to appear the warpage, and avoid holding seat 40 to appear warping. In order to fix the adapter sleeve 60 and the retaining base 40, the adapter sleeve 60 is provided with screw fitting holes 63 on the rotation stopping protrusions 62, and the front end of the fastening screw 50 on the retaining base 40 can be installed in the screw fitting holes 63, so that the positioning of the adapter sleeve 60 in the front-back direction is realized, and the rotation stopping of the adapter sleeve 60 can be realized in an auxiliary manner. The provision of the screw fitting hole 63 on the rotation stop projection 62 enables a more reliable attachment of the set screw.
During assembly, firstly, the protective tail sleeve 80, the crimping sleeve 70 and the holding seat 40 are sequentially sleeved on an optical cable, an optical fiber at the front end of the optical cable is connected with the ferrule assembly 20 and is installed in the shell 10, then the holding seat 40 is pushed to move forwards under the action of the spring 30 in the shell 10, the holding seat 40 is fixed on the shell 10 through the connecting arm 42, then a tensile element (not shown in the figure) in the optical cable is uniformly distributed on the excircle of the crimping part 61 at the rear end of the adapter sleeve 60 along the circumference, the crimping sleeve 70 is sleeved, the front end of the crimping sleeve 70 is crimped and fixed with the crimping part 61, the rear end of the crimping sleeve 70 is crimped and fixed with the outer skin of the optical cable, and finally the protective tail sleeve 80 is sleeved on the rear end of the crimping sleeve 70 to finish.
In the above embodiment, the front end of the adapter sleeve 60 is inserted into the insertion hole 43 and fixed in the insertion hole 43 of the holder 40 by the set screw 50, in other embodiments, the adapter sleeve 60 may be fixed to the holder 40 by other structures, for example, by adhesion; for another example, lock holes are respectively formed in the wall of the insertion hole 43 and the adapter sleeve 60, and are fixed by a lock pin in a form other than a set screw penetrating into the lock hole, such as a pin, which is axially divided into a holder 40 fitting section and an adapter sleeve 60 fitting section, and the pin and the lock hole in the holder 40 and/or the adapter sleeve 60 can be fixed by interference fit, or can be fixed by a snap structure (for example, a protruding point is formed on the outer circumferential surface of the lock pin, a groove is formed in the inner wall of the lock hole, and the lock pin is fixed by clamping the protruding point and the groove); in order to facilitate the disassembly of the pin, the rear end of the pin extends out of the lock hole during assembly, and if the pin needs to be disassembled, the pin can be taken out by applying force to the part of the rear end of the pin extending out of the lock hole. In order to make the disassembly of the pin more convenient, the part of the rear end of the pin extending out of the lock hole can be provided with a groove which extends to the small hole along the radial direction of the pin or is arranged on the peripheral surface of the pin, and a tool is inserted into the small hole or the groove during disassembly, so that the pin can be conveniently applied with force. For another example, the lock nail can be replaced by a rivet pressing rivet, after the rivet is arranged in the opening, impact is applied to the outer end face, the diameter of the rivet pressing rivet is slightly increased, interference fit with the opening is achieved, and the rivet can be damaged if needed to be detached.
In addition, in the above embodiment, the sleeve wall of the adapter sleeve 60 is provided with the screw fitting hole 63, and in other embodiments, the screw fitting hole 63 may be replaced by a screw fitting groove; of course, in other embodiments, the screw fitting hole 63 or the screw fitting groove may be omitted, and the set screw 50 may be directly fitted to the outer circumferential surface of the adapter sleeve 60. In other embodiments, only one set screw 50 may be provided, or the set screws 50 may be provided on both the upper and lower sides of the holder 40.
In the above embodiment, the thickened portions 45 are provided on both sides of the holder 40 in the left-right direction, but in other embodiments, the thickened portions 45 may not be provided in the holder 40 in a case where the requirement of the connection strength of the set screw 50 can be satisfied.
In the above embodiment, a circumferential rotation stopping structure is provided between the insertion hole 43 and the adaptor sleeve 60, and the circumferential rotation stopping structure is formed by the rotation stopping protrusion 62 on the hole wall of the insertion hole 43 and the rotation stopping groove 49 on the outer circumferential surface of the adaptor sleeve 60. In other embodiments, the axial detent structure may take other forms, such as providing only one detent projection 62 and one mating detent recess 49. In addition, in other embodiments, since the set screw 50 can also function as a rotation stop, a separate circumferential rotation stop structure can also be omitted.
In the above embodiment, the optical fiber through hole is a stepped hole, the front section of the stepped hole is a large diameter section, the large diameter section forms a backward stop step 44, and there is a gap between the front end of the adapter sleeve 60 and the stop step 44 during assembly, but in other embodiments, the adapter sleeve 60 may be assembled in a manner that the front end is pressed against the stop step 44. Of course, in other embodiments, the fiber through hole may be a constant diameter hole, and the stop step 44 is not provided.
An embodiment of the fiber optic cable assembly of the present invention is shown in fig. 7 and includes a fiber optic cable 90 and an MPO connector, the MPO connector being connected to an end of the fiber optic cable 90, and the structure of the MPO connector is the same as that of any of the above embodiments of MPO connectors, and will not be described herein again.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
- The MPO connector comprises a shell, a retaining seat, a crimping sleeve and a protective tail sleeve;the holding seat is used for being fixed in the shell, a crimping part is arranged at the rear part of the holding seat, and the crimping part is sleeved at the front end of the crimping sleeve and is crimped and fixed;the protective tail sleeve is sleeved at the rear end of the crimping sleeve to protect the optical cable;the MPO connector is characterized by also comprising an adapter sleeve;the adapter sleeve is provided with an axial through hole, and the optical fiber passes through the axial through hole;the rear end of the retaining seat is provided with an inserting hole, and the front end of the adapter sleeve is inserted into the inserting hole and fixed in the inserting hole;the crimping part is formed by the rear end part of the adapter sleeve, and the bearing capacity of the material selected by the adapter sleeve on the crimping acting force is larger than that of the material selected by the retaining base on the crimping acting force.
- 2. The MPO connector of claim 1, further comprising a locking pin, wherein the locking pin simultaneously penetrates through the holding base and the adapter sleeve along the radial direction of the plugging hole, and the adapter sleeve is fixed on the wall of the hole in the plugging hole through the locking pin.
- 3. The MPO connector according to claim 2, wherein a set screw hole is provided on a wall of the insertion hole of the adapter sleeve, the lock screw is a set screw fitted in the set screw hole, a screw fitting hole or a screw fitting groove is provided on a wall of the adapter sleeve, and a front end of the set screw extends into the screw fitting hole or the screw fitting groove.
- 4. The MPO connector of claim 3, wherein the set screws are arranged in pairs, the two set screws in a pair being arranged symmetrically.
- 5. The MPO connector according to any one of claims 2 to 4, wherein the holding base is provided with thickened portions at both widthwise sides thereof, and the lock pin is provided on the thickened portions of the holding base.
- 6. The MPO connector of claim 5, wherein the outer side of the thickened portion is provided with a slot, and the slot enables ribs to be formed on two sides of the thickened portion.
- 7. The MPO connector of claim 6, wherein the outer side surface of the thickened part is a bevel, the thickened thickness of the front end of the thickened part is larger than that of the rear end, the slot is arranged at the front end, and the locking pin is arranged at the rear end.
- 8. The MPO connector of any one of claims 1 to 4, wherein a circumferential rotation stop structure is provided between the insertion hole and the adapter sleeve.
- 9. The MPO connector of claim 8, wherein the wall of the insertion hole is provided with a rotation stop protrusion extending axially along the insertion hole;the peripheral surface of the switching sleeve is provided with a rotation stopping groove, and the rotation stopping protrusion is matched with the rotation stopping groove to form the circumferential rotation stopping structure.
- 10. A cable assembly comprising a cable and an MPO connector attached to an end of the cable, wherein the MPO connector is the MPO connector of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167149.8A CN110954996A (en) | 2019-11-25 | 2019-11-25 | MPO connector and optical cable assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167149.8A CN110954996A (en) | 2019-11-25 | 2019-11-25 | MPO connector and optical cable assembly |
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| CN110954996A true CN110954996A (en) | 2020-04-03 |
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| CN201911167149.8A Pending CN110954996A (en) | 2019-11-25 | 2019-11-25 | MPO connector and optical cable assembly |
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Application publication date: 20200403 |