CN113376757A

CN113376757A - V groove lock pin subassembly and have its fiber connector

Info

Publication number: CN113376757A
Application number: CN202110623177.7A
Authority: CN
Inventors: 张磊; 郑镇宏; 孙健; 黄雪云
Original assignee: Chaozhou Three Circle Group Co Ltd; Nanchong Three Circle Electronics Co Ltd
Current assignee: Chaozhou Three Circle Group Co Ltd; Nanchong Three Circle Electronics Co Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-09-10

Abstract

The invention relates to the technical field of connectors and discloses a V-groove ferrule assembly and an optical fiber connector with the same, wherein the ferrule assembly comprises a tailstock, a ferrule, a pressing block and a lock catch, wherein the tailstock is provided with a butt joint platform, the butt joint platform is provided with a first accommodating cavity, and two sides of the butt joint platform are provided with convex strips; one end of the tailstock is provided with an opening communicated with the first accommodating cavity; a second accommodating cavity is formed in the inserting core; one end of the insertion core is sleeved at the opening, and the second accommodating cavity is communicated with the first accommodating cavity; the other end of the core insert is positioned outside the tailstock; the pressing block is covered on the butt joint platform, and first grooves are formed in two sides of the pressing block; the two sides of one end of the pressing block are provided with convex blocks; the lock catch is slidably sleeved on the tailstock. The invention improves the storage time of the connector, reduces the requirement of the transportation condition of the connector and ensures the compactness of the optical fiber.

Description

V groove lock pin subassembly and have its fiber connector

Technical Field

The invention relates to the technical field of connectors, in particular to a V-groove ferrule assembly and an optical fiber connector with the same.

Background

The existing optical fiber connector mainly comprises a straight-through type and an embedded type, wherein the embedded type connector is that an optical fiber is embedded in an inner hole of an insertion core body, one end of the embedded type connector penetrates through the insertion core body and forms an end head butted with a normal connector after grinding and polishing, and the other end of the embedded type connector is exposed for a certain length and is used for connecting an external optical fiber.

A pre-buried connector typically includes a ferrule assembly, a connector body, and components such as a front sleeve, a rear sleeve, a cable clamp, and the like. The ferrule assembly is a core component of the embedded connector.

Generally, the components of the ferrule assembly include: the optical fiber connector comprises a core insert with an inner hole, a pressing block, a tailstock, a pre-buried optical fiber and a lock catch. One end of the insertion core is an insertion end, and the other end of the insertion core is sleeved in the insertion core accommodating cavity at the front end of the tailstock. The middle end of the tailstock is provided with an optical fiber butt joint platform, and an optical fiber accommodating groove is formed in the optical fiber butt joint platform. The embedded optical fiber is arranged in an inner hole of the ferrule, one end of the embedded optical fiber is located at the inserting end of the ferrule, and the other end of the embedded optical fiber extends into the optical fiber accommodating groove through a through hole at the front end of the tailstock. The pressing block is covered on the optical fiber butt-joint platform, the front end of the pressing block is adjacent to the front end of the tailstock, salient points are formed on the left side and the right side of the lower surface of the tail end of the pressing block, and the salient points are in contact with the upper surface of the optical fiber butt-joint platform. The lock catch is movably sleeved outside the tailstock.

When the ferrule assembly is in an unlocking state, the lock catch is positioned at the tail end region of the pressing and sticking block, and due to the existence of the convex points, a certain surplus space is formed between the lower surface of the pressing and sticking block and the upper surface of the optical fiber butt joint platform, so that the external optical fiber can be smoothly inserted into the optical fiber accommodating groove and is in butt joint with the embedded optical fiber; then the lock catch is moved to the position of the front end area of the pressing and pasting block, under the action of the lock catch, the lower surface of the pressing and pasting block is tightly matched with the upper surface of the optical fiber butt joint platform, and the optical fiber butt joint point is compressed.

In actual operation, since optical loss occurs when the optical fibers are butted, matching fluid needs to be pre-disposed in the end region of the pre-buried optical fiber in the optical fiber accommodating groove to reduce the optical loss. However, due to the existence of the surplus space in the unlocked state, the matching fluid is liable to flow out from the left and right sides of the surplus space and the volatilization of the matching fluid is accelerated, resulting in a large optical loss when the connector is inserted into the external optical fiber during operation.

Disclosure of Invention

The invention aims to provide a V-groove ferrule assembly and an optical fiber connector with the same, which improve the storage time and the service life of the connector, reduce the transportation condition requirement of the connector and ensure the compactness of an optical fiber.

In order to solve the technical problem, the invention provides a V-groove core-insert assembly which comprises a tailstock, a core insert, a pressing and pasting block and a lock catch, wherein a butt joint platform for optical fiber butt joint is arranged on the tailstock, a first accommodating cavity is arranged on the butt joint platform, and convex strips are arranged on two sides of the butt joint platform; one end of the tailstock is provided with an opening communicated with the first accommodating cavity; a second accommodating cavity corresponding to the first accommodating cavity is formed in the inserting core; one end of the insertion core is sleeved at the opening, and the second accommodating cavity is communicated with the first accommodating cavity; the other end of the core insert is positioned outside the tailstock; the pressing block is covered on the butt joint platform, and first grooves matched with the convex strips are formed in two sides of the pressing block; the two sides of one end of the pressing block are provided with convex blocks which are in abutting connection with the butt joint platform; the lock catch is slidably sleeved on the tailstock.

Preferably, a second groove extending along the width direction of the pressing block is formed in one end of the top surface of the pressing block.

Preferably, a third groove extending along the length direction of the pressing block is formed in the middle area of the top surface of the pressing block.

Preferably, the height of the bump is 0.05-0.13 mm.

Preferably, the first accommodating cavity is of a V-shaped groove structure.

Preferably, one end of the first accommodating cavity, which is far away from the second accommodating cavity, is provided with a tapered groove.

Preferably, an end of the tailstock, which is provided with the opening, is provided with an orientation block.

Preferably, one end of the tailstock far away from the opening is provided with a limiting clamping hook and a slot, and the slot extends along the long axis direction of the tailstock.

Preferably, one end of the tailstock is cylindrical, and the diameter ratio of the width of the slot to the end of the tailstock is not more than 0.5: 1.

in order to solve the above problems, the present invention further provides an optical fiber connector, including a main body and the V-groove ferrule assembly described in any one of the above, wherein the V-groove ferrule assembly is mounted in the main body.

The invention has the following beneficial effects:

because the raised strips are matched with the first grooves of the pressing and sticking blocks, the surplus space becomes a semi-closed space, the preset matching fluid cannot flow out from the left side and the right side of the surplus space, and the volatilization speed of the matching fluid is inhibited, so that the storage time of the connector which is not accessed with the external optical fiber is prolonged, and the transportation condition requirement of the connector is reduced; in addition, due to the fact that the protruding strips are matched with the first grooves, the left side and the right side of the pressing and sticking block relative to the butt joint platform are limited to move, and the fact that the optical fiber butt joint points are tightly pressed in a locking state is guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of a V-groove ferrule assembly provided by an embodiment of the invention;

FIG. 2 is an exploded view of a V-groove ferrule assembly provided by an embodiment of the present invention;

figure 3 is a cross-sectional view of a V-groove ferrule assembly provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a pressure block according to an embodiment of the present invention;

FIG. 5 is a schematic top view of a pressure block according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a tailstock provided in an embodiment of the present invention;

figure 7 is a ferrule assembly unlocking schematic provided by an embodiment of the present invention;

FIG. 8 is an enlarged view at A of FIG. 7;

figure 9 is a ferrule assembly locking schematic provided by an embodiment of the present invention;

FIG. 10 is an enlarged view at B of FIG. 9;

FIG. 11 is a schematic structural diagram of a fiber optic quick connector according to an embodiment of the present invention;

FIG. 12 is an exploded view of a fiber optic quick connector provided by an embodiment of the present invention;

FIG. 13 is a cross-sectional view of a fiber optic quick connector provided in accordance with an embodiment of the present invention;

FIG. 14 is a schematic diagram of a main structure of a fiber optic quick connector according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a front cover of a fiber optic quick connector according to an embodiment of the present invention.

Reference numerals: 1. a tailstock; 101. a docking platform; 102. a first accommodating chamber; 103. a convex strip; 104. an opening; 105. a tapered groove; 106. an orientation block; 107. a limiting clamping hook; 108. grooving; 2. inserting a core; 201. a second accommodating chamber; 3. pressing a sticking block; 301. a first groove; 302. a bump; 303. a second groove; 304. a third groove; 4. locking; 5. a V-groove ferrule assembly; 6. an external optical fiber; 7. pre-burying an optical fiber; 8. a main body; 801. a body window portion; 802. a first abutment projection; 803. a second abutment projection; 804. a limiting bulge; 805. a directional tank; 9. a rear sleeve; 10. an optical cable clamping part; 11. a front cover; 1101. abutting against the window; 1102. the front butt joint edge; 1103. and then abuts against the edge.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 4, a preferred embodiment of the present invention provides a V-groove ferrule assembly, including a tailstock 1, a ferrule 2, a pressing block 3, and a lock catch 4, wherein the tailstock 1 is provided with a docking platform 101 for optical fiber docking, the docking platform 101 is provided with a first accommodating cavity 102, and two sides of the docking platform 101 are provided with protruding strips 103; one end of the tailstock 1 is provided with an opening 104 communicated with the first accommodating cavity 102; a second accommodating cavity 201 corresponding to the first accommodating cavity 102 is formed in the ferrule 2; one end of the ferrule 2 is sleeved at the opening 104, and the second accommodating cavity 201 is communicated with the first accommodating cavity 102; the other end of the ferrule 2 is positioned outside the tailstock 1; the pressing block 3 is covered on the butt joint platform 101, and first grooves 301 matched with the convex strips 103 are formed in two sides of the pressing block 3; two sides of one end of the pressing block 3 are provided with a convex block 302 which is in abutting connection with the butt joint platform 101; the lock catch 4 is slidably sleeved on the tailstock 1.

It should be noted that the embedded optical fibers 7 are disposed in the first accommodating cavity 102 and the second accommodating cavity 201, and a through hole for allowing the external optical fiber 6 to enter the docking platform 101 is disposed at one end of the tailstock 1, which is far away from the ferrule 2. One end of the ferrule, which is positioned outside the tailstock, is a plug end, and the plug end is used for being connected with other adapters or connectors; the lug 103 and the first groove 301 are arranged on the bottom surface of the pressure sticking block 3, the lug 103 is arranged at one end, away from the opening 104, of the pressure sticking block 3, and the lug 103 is in abutting connection with the butt joint platform 101.

Based on the scheme, the working principle of the V-groove ferrule 2 assembly of the preferred embodiment of the invention is as follows: inserting an optical cable with an external optical fiber 6 from the tail end of the tailstock 1, so that the external optical fiber 6 is inserted into the first accommodating cavity 102 on the butt joint platform 101 and is in butt joint with the embedded optical fiber 7, covering the pressing block 3 on the butt joint platform 101, and matching the convex strip 103 with the first groove 301; then the lock catch 4 is sleeved outside the tailstock 1 and moved from the unlocking position to the locking position, so that the convex strip 103 is tightly matched with the first groove 301, the optical fiber butt joint point is compressed, and the assembly is completed.

Referring to fig. 5, as a preferable scheme, one end of the top surface of the pressing block 3 is provided with a second groove 303 extending along the width direction of the pressing block 3. Specifically, the thickness of the pressing block 3 in the second groove 303 area is thin, the pressing block has good toughness, and during locking, the deformation of the pressing block 3 mainly occurs in the second groove 303 area, so that the locking difficulty is reduced, the overall fatigue resistance of the pressing block 3 is improved, and the locking and unlocking operations can be repeated for multiple times without the occurrence of the condition of reduction of the mechanical property of the pressing block 3.

Preferably, a third groove 304 extending along the length direction of the pressure block 3 is formed in the middle area of the top surface of the pressure block 3. Specifically, from the perspective of injection molding, the third groove 304 is designed to make the wall thickness of the product more uniform, and no sudden change in thickness occurs, which causes shrinkage deformation of the bottom surface of the product, and results in that the two optical fibers cannot be coaxially aligned at this position.

Preferably, the height of the bump 302 is 0.05-0.13 mm. Specifically, the bump 302 is too small, which tends to make the fiber not smoothly pass through the tail, and too large, which tends to make the fiber fly after passing through the tail.

Referring to fig. 6, the first receiving cavity 102 is preferably a V-shaped groove structure. Specifically, when the optical fiber is placed in the V-groove, the optical fiber slightly protrudes from the surface of the optical fiber docking platform 101, so as to ensure that the optical fiber can be pressed by the pressing block 3.

Preferably, the end of the first accommodating cavity 102 away from the second accommodating cavity 201 is provided with a tapered groove 105. The size of the tapered slot 105 increases from the first accommodating cavity to the tail direction of the tailstock. The tapered groove 105 functions to: the embedded optical fiber 7 and the external optical fiber 6 can more smoothly and accurately extend into the first accommodating cavity 102. Furthermore, the lower surface of the pressing block 3 is provided with an inclined surface at a position corresponding to the tapered groove 105; the function of the inclined surface is the same as that of the tapered groove.

Preferably, an orientation block 106 is disposed on one end of the tailstock 1, which is opened with the opening 104. Specifically, the orientation block 106 may provide an orientation effect during connector assembly, and the orientation block 106 may cooperate with the orientation groove of the connector body 8 to achieve assembly.

Preferably, one end of the tailstock 1 is provided with a limiting hook 107 and a slot 108, and the slot 108 extends along the long axis direction of the tailstock 1. Specifically, in the process of assembling the optical fiber connector, the deformation of the limiting hook 107 in the gap is mainly borne by the tail end of the tailstock 1, so that the phenomenon that the limiting protrusion of the connector body 8 is deformed too much to cause permanent deformation or damage is avoided, and the stability of the optical fiber connector is ensured. Meanwhile, the deformation capacity of the tail end of the tailstock 1 is increased, so that labor is saved during manual assembly, and the assembly efficiency is high.

Preferably, one end of the tailstock 1 is cylindrical, and a ratio of a width of the slot 108 to a diameter of one end of the tailstock 1 is not greater than 0.5: 1. specifically, if the width of the slot 108 is too large, the barb strength is too low, and the tail stock 1 is easily removed from the inner hole of the connector body 8.

Preferably, the slots 108 are two and symmetrically arranged at the tail end of the tailstock 1.

Referring to fig. 7 to 10, preferably, the lock catch 4 is located at a tail end region of the pressure block 3 in the unlocked state and located at a front end region of the pressure block 3 in the locked state. In the unlocking state, the second groove 303 area is not deformed, and a surplus space is formed between the lower surface of the pressing block 3 and the butt joint platform. When the locking state is realized, the pressing block is in interference fit with the tailstock assembled with the pressing block, the second groove region deforms under the action of the interference force, the lower surface of the pressing block is tightly matched with the butt joint platform, and the butt joint point of the optical fiber is compacted.

Referring to fig. 11 to 13, in order to solve the above problem, the present invention further provides an optical fiber connector, including a main body 8 and the V-groove ferrule assembly 5 described in any one of the above, where the V-groove ferrule assembly 5 is installed in the main body 8.

The main body 8 of the optical fiber quick connector has a main body window 801, the V-groove ferrule assembly 5 is sleeved in the inner cavity of the main body 8, so that one end of the ferrule protrudes out of the front end opening of the main body 8, and the latch 4 is exposed out of the main body window 801 within a movable range.

Preferably, the fiber optic quick connector further comprises a rear ferrule 9 and a cable retaining portion 10. The optical cable clamping part 10 is arranged at the tail end of the main body 8, and the rear sleeve 9 is sleeved outside the tail end of the main body 8.

Preferably, the cable retaining portion is detachable from the main body 8 or integral with the main body 8.

Preferably, the connection mode of the rear sleeve 9 and the main body 8 can be as follows: rotatable connection, screw connection, or snap connection.

Referring to fig. 14 and 15, the optical fiber connector preferably further includes a front cover 11. The front sleeve 11 is sleeved outside the front end of the main body 8. A first abutting projection 802 and a second abutting projection 803 are formed on the outer surface of at least one side wall of the front end of the main body 8, and the two abutting projections are arranged at intervals along the axial direction of the main body 8; at least one side wall of the front sleeve 11 is provided with an abutting window 1101, the front sleeve 11 is sleeved outside the front end of the main body 8, two abutting protrusions are positioned in the abutting window 1101, the first abutting protrusion 802 can abut against a front abutting edge 1102 of the abutting window 1101 so as to limit the backward movement of the front sleeve 11, and the second abutting protrusion 803 can abut against a rear abutting edge 1103 of the abutting window 1101 so as to limit the forward movement of the front sleeve 11. The height of the first abutting protrusion 802 is lower than that of the second abutting protrusion 803, and the front abutting edge is closer to the inner cavity of the front cover 11 than the rear abutting edge.

Preferably, the side wall in the inner cavity of the main body 8 is provided with a limit protrusion 804, and the limit protrusion 804 and the limit hook 107 form a snap fit to limit the V-groove ferrule assembly 5 from moving towards the front end of the main body.

Preferably, an inner surface of a side wall of the front end of the main body 8 is formed with an orientation groove 805, and the orientation block is engaged with the orientation groove 805. This serves as an orientation when the ferrule assembly is assembled into the connector body 8.

In summary, the preferred embodiment of the present invention provides a V-groove ferrule assembly 5 and an optical fiber connector having the same, which is compared with the prior art:

in the invention, because the raised strips 103 are matched with the first grooves 301 of the pressing and sticking blocks 3, the surplus space becomes a semi-closed space, the preset matching fluid cannot flow out from the left side and the right side of the surplus space, and the volatilization speed of the matching fluid is inhibited, therefore, the storage time of the connector which is not accessed with the external optical fiber 6 is prolonged, and the transportation condition requirement of the connector is reduced; in addition, because the convex strip 103 is matched with the first groove 301, the left and right offset of the pressing block 3 relative to the docking platform 101 is limited, and the optical fiber docking point is ensured to be tightly pressed in a locking state.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a V groove lock pin subassembly which characterized in that: the method comprises the following steps:

the optical fiber butt joint device comprises a tailstock, wherein a butt joint platform for butt joint of optical fibers is arranged on the tailstock, a first accommodating cavity is formed in the butt joint platform, and convex strips are arranged on two sides of the butt joint platform; one end of the tailstock is provided with an opening communicated with the first accommodating cavity;

the insert core is internally provided with a second accommodating cavity corresponding to the first accommodating cavity; one end of the insertion core is sleeved at the opening, and the second accommodating cavity is communicated with the first accommodating cavity; the other end of the core insert is positioned outside the tailstock;

the pressing block is covered on the butt joint platform, and first grooves matched with the convex strips are formed in the two sides of the pressing block; the two sides of one end of the pressing block are provided with convex blocks which are in abutting connection with the butt joint platform;

the lock catch is slidably sleeved on the tailstock.

2. The V-groove ferrule assembly of claim 1, wherein: and one end of the top surface of the pressing block is provided with a second groove extending along the width direction of the pressing block.

3. The V-groove ferrule assembly of claim 1, wherein: and a third groove extending along the length direction of the pressing block is formed in the middle area of the top surface of the pressing block.

4. The V-groove ferrule assembly of claim 1, wherein: the height of the bump is 0.05-0.13 mm.

5. The V-groove ferrule assembly of claim 1, wherein: the first accommodating cavity is of a V-shaped groove structure.

6. The V-groove ferrule assembly of claim 1, wherein: one end of the first accommodating cavity, which is far away from the second accommodating cavity, is provided with a tapered groove.

7. The V-groove ferrule assembly of claim 1, wherein: an orientation block is arranged at one end of the tailstock, which is provided with an opening.

8. The V-groove ferrule assembly of claim 1, wherein: the tailstock is provided with a limiting clamping hook and a groove at one end far away from the opening, and the groove extends along the long axis direction of the tailstock.

9. The V-groove ferrule assembly of claim 8, wherein: one end of the tailstock is cylindrical, and the diameter ratio of the width of the groove to one end of the tailstock is not more than 0.5: 1.

10. an optical fiber connector, characterized by: comprising a body and a V-groove ferrule assembly according to any one of claims 1-9 mounted within the body.