Miniaturized optical fiber connector for small pipeline construction

Abstract

The invention relates to a miniature optical fiber connector for small pipeline construction, and the connector comprises a pre-installed insertion core assembly which comprises a ceramic insertion core assembly of which the tail end is pre-connected with an optical cable, the ceramic insertion core assembly comprises a tail handle, and one end, far away from the optical cable, of the tail handle is provided with an external thread used for connecting a traction cap; the adapter sleeve assembly comprises a clamping sleeve arranged on the periphery of the tail handle in a sleeving mode, the clamping sleeve comprises a fixed clamping sleeve and a movable clamping sleeve, and the movable clamping sleeve turns over relative to the fixed clamping sleeve so as to clamp or loosen the tail handle; and the plug connecting assembly comprises an inner plugging sleeve and an outer plugging sleeve, the clamping sleeve is detachably connected in the inner plugging sleeve, and the outer part of the outer plugging sleeve is slidably connected with a locking sliding sleeve and an unlocking sliding sleeve for driving the locking sliding sleeve to move. According to the invention, air-blowing pipe penetration construction of a small-diameter pipeline can be realized while a traction effect is satisfied, the pre-assembled insertion core assembly is assembled in the plug connection assembly on site through the adapter sleeve assembly, and the on-site assembly efficiency and the tensile property of the miniaturized optical fiber connector are improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber connectors, and in particular to a miniaturized optical fiber connector for small pipeline construction. Background Art

[0002] A fiber optic connector is a device that makes a detachable (movable) connection between optical fibers. It precisely connects the two end faces of the optical fiber so that the light energy output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent and the impact on the system caused by its involvement in the optical link can be minimized. This is the basic requirement of a fiber optic connector.

[0003] In the related art, the structure of the existing pre-assembled detachable optical fiber connector is often complex, the connector is large in size, and the connector cannot be disassembled after assembly, making it difficult to apply it to some special applications, such as air blowing scenarios.

[0004] Driven by the "fiber to the home" policy, air-blown optical cable technology has been widely used. In most cases, the size of the pipe used for air blowing corresponds to the diameter of the optical cable at the home section, which is generally around 3 to 4 mm.

[0005] However, after the conventional fiber optic connector completes the connection of the cable end, it requires a pipe with an inner diameter of at least 11 mm, which greatly wastes the pipe space. For this reason, it is difficult to use the optical cable with the fiber optic connector installed for air blowing in the prior art, which to some extent affects the sustainable development of air blowing technology. Summary of the invention

[0006] The embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction to solve the problem in the related art that the pre-assembled detachable optical fiber connector often cannot be separated and disassembled after assembly, which is not conducive to air blowing construction in small pipelines.

[0007] The embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, including:

[0008] A pre-installed ferrule assembly, the pre-installed ferrule assembly comprising a ceramic ferrule assembly with an optical cable pre-connected at the end, the ceramic ferrule assembly comprising a tail handle, and an end of the tail handle away from the optical cable is provided with an external thread for connecting a traction cap;

[0009] An adapter sleeve assembly, the adapter sleeve assembly comprising a clamping sleeve sleeved on the outer periphery of the tail handle, the clamping sleeve comprising a fixed sleeve and a movable sleeve, the movable sleeve flips relative to the fixed sleeve to clamp or loosen the tail handle;

[0010] A plug connection assembly comprises an inner plug sleeve and an outer plug sleeve which are coaxially arranged, wherein the clamping sleeve is detachably connected to the inner plug sleeve, and the outer part of the outer plug sleeve is slidably connected to a locking sleeve and an unlocking sleeve which drives the locking sleeve to move.

[0011] In some embodiments: a positioning groove is provided on the outer wall of the tail handle to position the tail handle axially and circumferentially in the clamping sleeve;

[0012] The fixed jacket comprises a large-diameter sleeve and a small-diameter jacket fixedly connected to one end of the large-diameter sleeve;

[0013] One end of the movable jacket is rotatably connected to one end of the large-diameter sleeve via a rotating shaft, and is snap-connected to the small-diameter jacket;

[0014] The inner walls of the movable jacket and the small-diameter jacket away from the end of the large-diameter sleeve are both provided with positioning blocks matched with the positioning grooves.

[0015] In some embodiments: the cross-sections of the movable jacket and the small-diameter jacket are both "C"-shaped structures, and when the movable jacket and the small-diameter jacket are buckled together, a tube structure closed on all sides is formed;

[0016] The movable jacket is symmetrically provided with elastic clamping arms on both sides close to the small-diameter jacket, and the small-diameter jacket is symmetrically provided with bosses buckled and connected with the elastic clamping arms on both sides.

[0017] In some embodiments: one end of the large diameter sleeve away from the small diameter jacket is coaxially connected with a tail end sleeve, and an annular limiting groove is formed between the tail end sleeve and the large diameter sleeve;

[0018] The adapter sleeve assembly also includes a first locking nut which is rotatably connected in the annular limiting groove and is threadedly connected to the end of the inner plug-in sleeve.

[0019] In some embodiments: the front end opening of the outer plug-in sleeve is retracted, and the front end of the inner plug-in sleeve is provided with a retaining ring that abuts against the front end opening of the outer plug-in sleeve;

[0020] The end of the outer plug-in sleeve is threadedly connected with a second locking nut for axially locking the inner plug-in sleeve in the outer plug-in sleeve.

[0021] In some embodiments: a locking groove for locking a plug or an adapter is provided on the outer wall of the outer plug-in sleeve, and a locking block located outside the locking groove is provided at one end of the locking sleeve, and the locking block extends in the axial direction of the locking sleeve;

[0022] An elastic arm is also provided on the outer wall of the outer plug-in sleeve, one end of the elastic arm is a fixed end and is fixedly connected to the outer plug-in sleeve, and one end of the elastic arm is a free end and is provided with a barb for axially limiting the locking sleeve.

[0023] In some embodiments: the outer wall of the outer plug-in sleeve is provided with a compression spring which elastically pushes the locking sleeve to move toward the direction close to the barb and the locking groove;

[0024] The locking sleeve is coaxially located inside the unlocking sleeve, and a baffle is provided on the inner wall of the unlocking sleeve to push the locking sleeve to move away from the barb and the locking groove;

[0025] A ring sleeve is rotatably connected to the outer wall of the unlocking sliding sleeve, and a pull rope is connected to the ring sleeve for pulling the unlocking sliding sleeve to slide toward the end of the outer plug-in sleeve.

[0026] In some embodiments: a first sealing ring sealingly connected to the unlocking sleeve is provided on the outer wall of the end of the outer plug-in sleeve, and a second sealing ring sealingly connected to a plug or an adapter is provided on the inner wall of the unlocking sleeve near the front end of the outer plug-in sleeve.

[0027] In some embodiments: the ceramic ferrule assembly further comprises a ceramic ferrule seat connected to the front end of the tail handle, the front end of the ceramic ferrule seat is connected to a ceramic ferrule, and a telescopic spring is connected between the ceramic ferrule seat and the tail handle;

[0028] The front end of the tail handle is threadedly connected with a traction cap, the ceramic ferrule seat, the ceramic ferrule and the telescopic spring are all located in the traction cap, and the front end of the traction cap is provided with a traction hole.

[0029] In some embodiments: a third sealing ring is provided on the tail handle, and the third sealing ring is sealed and connected to the inner wall of the traction cap opening.

[0030] The beneficial effects of the technical solution provided by this application include:

[0031] The embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction. Since the miniaturized optical fiber connector of the present application is provided with a pre-installed ferrule assembly, the pre-installed ferrule assembly includes a ceramic ferrule assembly with an optical cable pre-connected at the end, the ceramic ferrule assembly includes a tail handle, and the end of the tail handle away from the optical cable is provided with an external thread for connecting a traction cap; a transition sleeve assembly, the transition sleeve assembly includes a clamping sleeve sleeved on the outer periphery of the tail handle, the clamping sleeve includes a fixed sleeve and a movable sleeve, and the movable sleeve is flipped relative to the fixed sleeve to clamp or loosen the tail handle; a plug connection assembly, the plug connection assembly includes a coaxially arranged inner plug-in sleeve and an outer plug-in sleeve, the clamping sleeve is detachably connected to the inner plug-in sleeve, the outer side of the outer plug-in sleeve is slidably connected to a locking sleeve, and an unlocking sleeve that drives the locking sleeve to move.

[0032] Therefore, the miniaturized optical fiber connector of the present application pre-connects the ceramic ferrule assembly with the optical cable to form a pre-formed end. The optical cable and the ceramic ferrule assembly are fixed before leaving the factory, and there is no need to solve the problem of fixing the optical cable on site, which improves the efficiency of on-site pipe threading operations. A traction cap is threadedly connected to the tail handle of the ceramic ferrule assembly, and the traction cap is used to connect the air-blowing traction device, which can achieve air-blowing pipe threading construction of small-diameter pipes while satisfying the traction effect. After the pre-installed ferrule assembly completes the air-blowing pipe threading construction, the pre-installed ferrule assembly is inserted into the clamping sleeve of the adapter sleeve assembly, and the clamping sleeve is flipped relative to the fixed sleeve by the movable sleeve to clamp the tail handle of the pre-installed ferrule assembly, and then the ceramic ferrule assembly is fixed in the adapter sleeve assembly, which improves the on-site assembly efficiency and tensile performance of the miniaturized optical fiber connector.

[0033] In addition, the adapter sleeve assembly serves as an intermediate transition assembly for connecting the pre-installed ferrule assembly with the plug connection assembly. After the adapter sleeve assembly clamps and fixes the pre-installed ferrule assembly, the pre-installed ferrule assembly and the adapter sleeve assembly are detachably connected as a whole in the plug connection assembly to form a complete miniaturized optical fiber connector, thereby realizing the installation and disassembly of the miniaturized optical fiber connector at the construction site. The plug connection assembly includes an inner plug sleeve and an outer plug sleeve arranged coaxially. The clamping sleeve is detachably connected to the inner plug sleeve, thereby axially and circumferentially fixing the pre-installed ferrule assembly and the adapter sleeve assembly in the plug connection assembly. The outer plug sleeve is slidably connected with a locking sleeve and an unlocking sleeve. When the plug connection assembly is inserted into the adapter or the plug, the locking sleeve is used to lock the plug connection assembly with the adapter or the plug to prevent it from loosening. When the plug connection assembly needs to be detached from the adapter or the plug, the unlocking sleeve is used to unlock the locking sleeve, thereby detaching the plug connection assembly from the adapter or the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 This is a schematic diagram of the structure of a miniaturized optical fiber connector according to an embodiment of the present application;

[0036] Figure 2 This is a first cross-sectional view of the miniaturized optical fiber connector according to an embodiment of the present application;

[0037] Figure 3 A second cross-sectional view of the miniaturized optical fiber connector according to an embodiment of the present application;

[0038] Figure 4This is a schematic diagram of the structure of the pre-installed ferrule assembly of the embodiment of the present application;

[0039] Figure 5 This is a structural cross-sectional view of a pre-installed ferrule assembly according to an embodiment of the present application;

[0040] Figure 6 This is a schematic diagram of the structure of the pre-installed plug assembly connected to the traction cap in the embodiment of the present application;

[0041] Figure 7 This is a schematic structural diagram of a transition sleeve assembly according to an embodiment of the present application;

[0042] Figure 8 This is a structural cross-sectional view of the adapter sleeve assembly of an embodiment of the present application;

[0043] Fig. 9 This is a schematic diagram of the structure of a plug connection assembly according to an embodiment of the present application;

[0044] Fig.10 This is a first cross-sectional view of the plug connection assembly according to an embodiment of the present application;

[0045] Fig.11 A second cross-sectional view of the plug connection assembly according to an embodiment of the present application;

[0046] Fig.12 This is a schematic diagram of the structure of the plug according to an embodiment of the present application;

[0047] Fig.13 This is a structural schematic diagram of a miniaturized optical fiber connector connection plug according to an embodiment of the present application;

[0048] Fig.14 This is a structural cross-sectional view of a miniaturized optical fiber connector connection plug according to an embodiment of the present application.

[0049] Reference numerals:

[0050] 10. Pre-installed ferrule assembly; 11. Optical cable; 12. Tail handle; 13. External thread; 14. Positioning groove; 15. Ceramic ferrule seat; 16. Ceramic ferrule; 17. Telescopic spring; 18. Traction cap; 19. Third sealing ring;

[0051] 20. Adapter sleeve assembly; 21. Fixed jacket; 22. Movable jacket; 23. Large diameter sleeve; 24. Small diameter jacket; 25. Elastic clamp arm; 26. Tail end sleeve; 27. First locking nut; 28. Positioning block; 29. ​​Rotating shaft;

[0052] 30. Plug connection assembly; 31. Inner plug sleeve; 31a. Retaining ring; 32. Outer plug sleeve; 32a. Elastic arm; 32b. Barb; 32c. Locking groove; 33. Locking sleeve; 33a. Locking block; 34. Unlocking sleeve; 34a. Baffle; 35. Ring; 36. Draw rope; 37. Compression spring; 38. Second locking nut; 39. First sealing ring;

[0053] 40. Plug; 41. Second sealing ring; 42. Elastic locking arm. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0055] The embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, which can solve the problem in the related art that the pre-assembled detachable optical fiber connector often cannot be separated and disassembled after assembly, which is not conducive to air blowing construction in small pipelines.

[0056] See also Figures 1 to 11 As shown, the embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, including:

[0057] A pre-installed ferrule assembly 10 includes a ceramic ferrule assembly with an optical cable 11 pre-connected at the end, and the ceramic ferrule assembly includes a tail handle 12, and the end of the tail handle 12 away from the optical cable 11 is provided with an external thread 13 for connecting a traction cap 18. The ceramic ferrule assembly and the optical cable 11 are pre-connected to form a pre-formed end, and the optical cable 11 and the ceramic ferrule assembly are fixed before leaving the factory. There is no need to solve the problem of optical cable fixing on site, which improves the efficiency of on-site pipe threading operations. The traction cap 18 is threadedly connected to the tail handle 12 of the ceramic ferrule assembly, and the traction cap 18 is used to connect the air blowing traction device, which can achieve air blowing pipe threading construction of small-diameter pipes while meeting the traction effect.

[0058] The adapter sleeve assembly 20 includes a clamping sleeve sleeved on the outer periphery of the tail handle 12, and the clamping sleeve includes a fixed sleeve 21 and a movable sleeve 22. The movable sleeve 22 is flipped relative to the fixed sleeve 21 to clamp or loosen the tail handle 12. The tail handle 12 is a hollow metal tube structure. After the pre-installed ferrule assembly 10 is completed by air blowing through the pipe, the pre-installed ferrule assembly 10 is inserted into the clamping sleeve of the adapter sleeve assembly 20. The clamping sleeve is flipped relative to the fixed sleeve 21 through the movable sleeve 22 to clamp the tail handle 12 of the pre-installed ferrule assembly, and then the tail handle 12 of the ceramic ferrule assembly is fixed in the adapter sleeve assembly 20, thereby improving the on-site assembly efficiency and tensile performance of the miniaturized optical fiber connector.

[0059] The plug connection assembly 30 includes an inner plug sleeve 31 and an outer plug sleeve 32 which are coaxially arranged. The clamping sleeve is detachably connected to the inner plug sleeve 31. The outer part of the outer plug sleeve 32 is slidably connected to a locking sleeve 33 and an unlocking sleeve 34 which drives the locking sleeve 33 to move. The adapter sleeve assembly 20 is used as an intermediate transition assembly for connecting the pre-installed ferrule assembly 10 with the plug connection assembly 30. After the adapter sleeve assembly 20 clamps and fixes the pre-installed ferrule assembly 10, the pre-installed ferrule assembly 10 and the adapter sleeve assembly 20 are detachably connected as a whole in the plug connection assembly 30 to form a complete miniaturized optical fiber connector, which can be plugged and unplugged with the adapter or plug 40.

[0060] The miniaturized optical fiber connector of the embodiment of the present application pre-connects the ceramic ferrule assembly with the optical cable 11 to form a pre-formed end. The optical cable 11 and the ceramic ferrule assembly are fixed before leaving the factory, and there is no need to solve the problem of fixing the optical cable 11 and the ceramic ferrule assembly on site, which improves the efficiency of on-site pipe threading operations. The traction cap 18 is threadedly connected to the tail handle 12 of the ceramic ferrule assembly, and the traction cap 18 is used to connect the air blowing traction device, which can achieve air blowing pipe threading construction of small-diameter pipes while meeting the traction function.

[0061] After the pre-installed ferrule assembly 10 is completed through air blowing through the pipe, the pre-installed ferrule assembly 10 is inserted into the clamping sleeve of the adapter sleeve assembly 20, and the clamping sleeve is turned relative to the fixed sleeve 21 through the movable sleeve 22 to clamp the tail handle 12 of the pre-installed ferrule assembly, thereby fixing the ceramic ferrule assembly in the adapter sleeve assembly 20, thereby improving the on-site assembly efficiency and tensile performance of the miniaturized optical fiber connector. The adapter sleeve assembly 20 is inserted and fixed together with the pre-installed ferrule assembly 10 in the plug connection assembly 30, which facilitates the on-site completion of the air blowing through the pipe construction and on-site assembly of the miniaturized optical fiber connector.

[0062] The adapter sleeve assembly 20 is used as an intermediate transition assembly for connecting the pre-installed ferrule assembly 10 with the plug connection assembly 30. After the adapter sleeve assembly 20 clamps and fixes the pre-installed ferrule assembly 10, the pre-installed ferrule assembly 10 and the adapter sleeve assembly 20 are detachably connected as a whole in the plug connection assembly 30 to form a complete miniaturized optical fiber connector. The plug connection assembly 30 is used for plugging and unplugging the adapter or plug 40. The plug connection assembly 30 includes a coaxially arranged inner plug sleeve 31 and an outer plug sleeve 32. The clamping sleeve is detachably connected to the inner plug sleeve 31, thereby fixing the pre-installed ferrule assembly 10 and the adapter sleeve assembly 20 axially and circumferentially in the plug connection assembly 30.

[0063] A locking sleeve 33 and an unlocking sleeve 34 are slidably connected to the outer plug sleeve 32. When the plug connection assembly 30 is inserted into the adapter or plug 40, the locking sleeve 33 is used to lock the plug connection assembly 30 and the adapter or plug 40 to prevent them from being loosened after being connected to each other. When the plug connection assembly 30 needs to be separated from the adapter or plug 40, the unlocking sleeve 34 is used to unlock the locking sleeve 33, and then the plug connection assembly 30 is separated from the adapter or plug 40, so that the miniaturized optical fiber connector can be assembled on site and then plugged and unplugged with the adapter or plug 40.

[0064] In some alternative embodiments, see Figures 1 to 8 As shown, the embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, and a positioning groove 14 is provided on the outer wall of the tail handle 12 of the miniaturized optical fiber connector to position the tail handle 12 axially and circumferentially in the clamping sleeve, and the positioning groove 14 surrounds the tail handle 12 for a circle or half a circle. When the positioning groove 14 surrounds the tail handle 12 for a circle, the clamping sleeve can axially position the tail handle 12 to prevent the tail handle 12 from axially moving in the clamping sleeve. When the positioning groove 14 surrounds the half circle of the tail handle 12, the clamping sleeve can axially position the tail handle 12 to prevent the tail handle 12 from axially moving and rotating circumferentially in the clamping sleeve.

[0065] The fixed jacket 21 includes a large diameter sleeve 23, and a small diameter jacket 24 fixedly connected to one end of the large diameter sleeve 23. The large diameter sleeve 23 is a hollow tube structure, and the small diameter jacket 24 and the movable jacket 22 are interlocked to form a small diameter sleeve with a diameter smaller than that of the large diameter sleeve 23. One end of the movable jacket 22 is rotatably connected to one end of the large diameter sleeve 23 through a rotating shaft 29, and is interlocked with the small diameter jacket 24. When the tail handle 12 needs to be assembled in the adapter sleeve assembly 20, the movable jacket 22 is first rotated in the opposite direction around the rotating shaft 29 to open the movable jacket 22 and the small diameter jacket 24, and then the tail handle 12 is assembled in the adapter sleeve assembly 20, and finally the movable jacket 22 is rotated in the forward direction around the rotating shaft 29 to close the movable jacket 22 and the small diameter jacket 24 to clamp the tail handle 12.

[0066] On the inner walls of the movable jacket 22 and the small-diameter jacket 24, away from one end of the large-diameter sleeve 23, positioning blocks 28 adapted to the positioning grooves 14 are provided. When the movable jacket 22 is rotated forward around the rotating shaft 29 so that the movable jacket 22 and the small-diameter jacket 24 are closed and clamped to the tail stock 12, the positioning blocks 28 on the inner walls of the movable jacket 22 and the small-diameter jacket 24 are both located in the positioning grooves 14. The positioning blocks 28 cooperate with the positioning grooves 14 to axially and circumferentially limit the tail stock 12, preventing the tail stock 12 from axially moving and circumferentially rotating relative to the adapter sleeve assembly 20 after being assembled in the adapter sleeve assembly 20.

[0067] In some alternative embodiments, referring to Figures 7 and 8 As shown, the embodiment of the present application provides a miniaturized fiber optic connector for small pipeline construction. The cross-sections of the movable jacket 22 and the small-diameter jacket 24 of the miniaturized fiber optic connector are both in a "C" or "匚" shape structure. When the movable jacket 22 and the small-diameter jacket 24 are buckled together to form a tube structure closed on all sides. On both sides of the movable jacket 22 close to the small-diameter jacket 24, elastic clamping arms 25 are symmetrically provided, and on both sides of the small-diameter jacket 24, bosses snap-connected to the elastic clamping arms 25 are symmetrically provided.

[0068] The elastic clamping arms 25 of the embodiment of the present application radially extend to both sides of the small-diameter jacket 24 on both sides of the small-diameter jacket 24, and bosses snap-connected to the elastic clamping arms 25 are symmetrically provided on both sides of the small-diameter jacket 24. When the movable jacket 22 and the small-diameter jacket 24 are buckled together to form a tube structure closed on all sides, the free ends of the elastic clamping arms 25 are snap-connected to the bosses, so that the movable jacket 22 and the small-diameter jacket 24 are buckled and locked to prevent the movable jacket 22 from accidentally opening by rotating around the rotating shaft 29.

[0069] One end of the large-diameter sleeve 23 away from the small-diameter jacket 24 is coaxially connected with a tail-end sleeve 26. The tail-end sleeve 26 is used to penetrate the optical cable 11 to protect the connection position between the optical cable 11 and the tail stock 12. An annular limiting groove is formed between the tail-end sleeve 26 and the large-diameter sleeve 23. The adapter sleeve assembly 20 further includes a first locking nut 27 rotatably connected in the annular limiting groove and threadedly connected to the end of the inner insertion sleeve 31. The first locking nut 27 is provided with an internal thread, and an external thread connected to the first locking nut 27 is provided at the end of the inner insertion sleeve 31. When the first locking nut 27 is threadedly connected to the end of the inner insertion sleeve 31, the adapter sleeve assembly 20 is fixed in the inner insertion sleeve 31.

[0070] In some alternative embodiments, referring to Figures 9 to 11As shown, the embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, in which the front end opening of the outer plug-in sleeve 32 of the miniaturized optical fiber connector is retracted, and a retaining ring 31a is provided at the front end of the inner plug-in sleeve 31 to abut against the front end opening of the outer plug-in sleeve 32. When the front end of the inner plug-in sleeve 31 is inserted from the end of the outer plug-in sleeve 32, the retaining ring 31a at the front end of the inner plug-in sleeve 31 abuts against the front end opening of the outer plug-in sleeve 32 to limit the axial position of the inner plug-in sleeve 31 in the outer plug-in sleeve 32.

[0071] The end of the outer plug sleeve 32 is threadedly connected with a second locking nut 38 for axially locking the inner plug sleeve 31 in the outer plug sleeve 32. The end of the outer plug sleeve 32 is provided with an internal thread, and the front end outer wall of the second locking nut 38 is provided with an external thread that is threadedly connected to the end of the outer plug sleeve 32. When the second locking nut 38 is threadedly connected to the end of the outer plug sleeve 32, the front end surface of the second locking nut 38 abuts against the outer wall of the inner plug sleeve 31, thereby axially locking the inner plug sleeve 31 in the outer plug sleeve 32, which facilitates on-site assembly of the inner plug sleeve 31 and the outer plug sleeve 32.

[0072] In some alternative embodiments, see Figures 9 to 14 As shown, the embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction, and the outer wall of the outer plug sleeve 32 of the miniaturized optical fiber connector is provided with a locking groove 32c for locking the plug 40 or the adapter, and two locking grooves 32c are provided, and the two locking grooves 32c are symmetrically arranged on the outer wall of the outer plug sleeve 32. A locking block 33a located outside the locking groove 32c is provided at one end of the locking sleeve 33, and the locking block 33a extends in the axial direction of the locking sleeve 33.

[0073] The locking sleeve 33 slides axially on the outer wall of the outer plug-in sleeve 32. When the locking block 33a of the sliding locking sleeve 33 makes the projection of the locking block 33a and the locking groove 32c in the radial direction coincide, the locking block 33a of the locking sleeve 33 presses the locking plug 40 or the elastic locking arm 42 of the adapter into the locking groove 32c. At this time, the locking plug 40 or the adapter and the miniaturized optical fiber connector are locked with each other through the locking groove 32c and the elastic locking arm 42 to prevent the plug 40 or the adapter from accidentally loosening after being plugged into the miniaturized optical fiber connector.

[0074] When the locking block 33a of the sliding locking sleeve 33 makes the projections of the locking block 33a and the locking groove 32c in the radial direction not overlap with each other, the locking block 33a of the locking sleeve 33 unlocks the elastic locking arm 42 of the locking plug 40 or the adapter, and the elastic locking arm 42 that is not pressed by the locking block 33a is in a free state. At this time, the locking plug 40 or the adapter can be detached from the miniaturized optical fiber connector.

[0075] In some alternative embodiments, see Figures 9 to 11 As shown, an embodiment of the present application provides a miniaturized optical fiber connector for small pipe construction, and an elastic arm 32a is also provided on the outer wall of the outer plug-in sleeve 32 of the miniaturized optical fiber connector, one end of the elastic arm 32a is a fixed end and is fixedly connected to the outer plug-in sleeve 32, and one end of the elastic arm 32a is a free end and is provided with an axial limit locking sleeve 33 and a barb 32b of an unlocking sleeve 34.

[0076] A notch for accommodating the elastic arm 32a is provided on the outer wall of the outer plug-in sleeve 32. The barb 32b at the free end of the elastic arm 32a protrudes out of the notch in a free state, and the barb 32b at the free end of the elastic arm 32a retracts into the notch under the extrusion of an external force. After the locking sleeve 33 and the unlocking sleeve 34 are sleeved on the outer plug-in sleeve 32 from the front end, they continue to slide toward the end of the outer plug-in sleeve 32. After the locking sleeve 33 and the unlocking sleeve 34 slide over the barb 32b, the barb 32b protrudes out of the notch to axially limit the locking sleeve 33 and the unlocking sleeve 34.

[0077] The outer wall of the outer plug-in sleeve 32 is provided with a compression spring 37 that elastically pushes the locking sleeve 33 and the unlocking sleeve 34 to move toward the direction close to the barb 32b and the locking groove 32c. One end of the compression spring 37 abuts against the locking sleeve 33, and the other end of the compression spring 37 abuts against the outer wall of the end of the outer plug-in sleeve 32. The locking sleeve 33 is coaxially located in the unlocking sleeve 34, and a baffle 34a is provided on the inner wall of the unlocking sleeve 34 to push the unlocking sleeve 34 to move away from the barb 32b and the locking groove 32c.

[0078] A ring sleeve 35 is rotatably connected to the outer wall of the unlocking sleeve 34, and a pull rope 36 is connected to the ring sleeve 35 for pulling the locking sleeve 33 to slide toward the end of the outer plug sleeve 32. When the plug 40 or the adapter needs to be disconnected from the miniaturized optical fiber connector, the pull rope 36 is pulled by hand, and the pull rope 36 pulls the unlocking sleeve 34 to slide toward the end of the outer plug sleeve 32 through the ring sleeve 35. The unlocking sleeve 34 drives the locking sleeve 33 to move away from the barb 32b and the locking groove 32c through the baffle 34a. When the locking block 33a on the locking sleeve 33 unlocks the elastic locking arm 42 of the plug 40 or the adapter, the unlocking action is achieved.

[0079] In some alternative embodiments, see Figures 9 to 14 As shown, an embodiment of the present application provides a miniaturized optical fiber connector for small pipe construction, wherein a first sealing ring 39 sealingly connected to an unlocking sleeve 34 is provided on the outer wall at the end of the outer plug-in sleeve 32 of the miniaturized optical fiber connector, and a second sealing ring 41 sealingly connected to a plug 40 or an adapter is provided on the inner wall of the unlocking sleeve 34 near the front end of the outer plug-in sleeve 32, and the second sealing ring 41 is sleeved on the outer wall of the plug 40 or the adapter.

[0080] See also Figures 4 to 6 As shown, the ceramic ferrule assembly also includes a ceramic ferrule seat 15 connected to the front end of the tail handle 12, a ceramic ferrule 16 is connected to the front end of the ceramic ferrule seat 15, and a telescopic spring 17 is connected between the ceramic ferrule seat 15 and the tail handle 12. A traction cap 18 is threadedly connected to the front end of the tail handle 12, and the ceramic ferrule seat 15, the ceramic ferrule 16 and the telescopic spring 17 are all located in the traction cap 18, and a traction hole is provided at the front end of the traction cap 18. A third sealing ring 19 is provided on the tail handle 12, and the third sealing ring 19 is sealed and connected to the inner wall at the opening of the traction cap 18.

[0081] How it works

[0082] The embodiment of the present application provides a miniaturized optical fiber connector for small pipeline construction. Since the miniaturized optical fiber connector of the present application is provided with a pre-installed ferrule assembly 10, the pre-installed ferrule assembly 10 includes a ceramic ferrule assembly with an optical cable 11 pre-connected at the end, the ceramic ferrule assembly includes a tail handle 12, and the end of the tail handle 12 away from the optical cable 11 is provided with an external thread 13 for connecting a traction cap 18; an adapter sleeve assembly 20, the adapter sleeve assembly 20 includes a clamping sleeve sleeved on the outer periphery of the tail handle 12, the clamping sleeve includes a fixed sleeve 21 and a movable sleeve 22, the movable sleeve 22 is flipped relative to the fixed sleeve 21 to clamp or loosen the tail handle 12; a plug connection assembly 30, the plug connection assembly 30 includes a coaxially arranged inner plug-in sleeve 31 and an outer plug-in sleeve 32, the clamping sleeve is detachably connected to the inner plug-in sleeve 31, the outer part of the outer plug-in sleeve 32 is slidably connected to a locking sleeve 33, and an unlocking sleeve 34 that drives the locking sleeve 33 to move.

[0083] Therefore, the miniaturized optical fiber connector of the present application pre-connects the ceramic ferrule assembly with the optical cable 11 to form a pre-formed end. The optical cable 11 and the ceramic ferrule assembly are fixed before leaving the factory, and there is no need to solve the problem of fixing the optical cable 11 on site, which improves the efficiency of on-site pipe threading operations. The traction cap 18 is threadedly connected to the tail handle 12 of the ceramic ferrule assembly, and the traction cap 18 is used to connect the air-blowing traction device, which can achieve the air-blowing pipe threading construction of small-diameter pipes while satisfying the traction effect. After the pre-installed ferrule assembly 10 completes the air-blowing pipe threading construction, the pre-installed ferrule assembly 10 is inserted into the clamping sleeve of the adapter sleeve assembly 20, and the clamping sleeve is turned over by the movable jacket 22 relative to the fixed jacket 21 to clamp the tail handle 12 of the pre-installed ferrule assembly, and then the ceramic ferrule assembly is fixed in the adapter sleeve assembly 20, which improves the on-site assembly efficiency and tensile performance of the miniaturized optical fiber connector.

[0084] The adapter sleeve assembly 20 is used as an intermediate transition assembly for connecting the pre-installed ferrule assembly 10 with the plug connection assembly 30. After the adapter sleeve assembly 20 clamps and fixes the pre-installed ferrule assembly 10, the pre-installed ferrule assembly 10 and the adapter sleeve assembly 20 are detachably connected as a whole in the plug connection assembly 30 to form a complete miniaturized optical fiber connector. The plug connection assembly 30 includes an inner plug sleeve 31 and an outer plug sleeve 32 arranged coaxially. The clamping sleeve is detachably connected to the inner plug sleeve 31, thereby fixing the pre-installed ferrule assembly 10 and the adapter sleeve assembly 20 axially and circumferentially in the plug connection assembly 30. The outer plug sleeve 32 is slidably connected with a locking sleeve 33 and an unlocking sleeve 34. When the plug connection assembly 30 is inserted into the adapter or plug 40, the locking sleeve 33 is used to lock the plug connection assembly 30 with the adapter or plug 40 to prevent loosening. When the plug connection assembly 30 needs to be separated from the adapter or the plug 40 , the unlocking sleeve 34 is used to unlock the locking sleeve 33 , thereby separating the plug connection assembly 30 from the adapter or the plug 40 .

[0085] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0086] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0087] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A miniaturized optical fiber connector for small pipeline construction, characterized in that: include: A pre-installed ferrule assembly (10), the pre-installed ferrule assembly (10) comprising a ceramic ferrule assembly with an optical cable (11) pre-connected at the end, the ceramic ferrule assembly comprising a tail handle (12), and an end of the tail handle (12) away from the optical cable (11) is provided with an external thread (13) for connecting a traction cap (18); An adapter sleeve assembly (20), the adapter sleeve assembly (20) comprising a clamping sleeve sleeved on the outer periphery of the tail handle (12), the clamping sleeve comprising a fixed sleeve (21) and a movable sleeve (22), the movable sleeve (22) being turned relative to the fixed sleeve (21) to clamp or loosen the tail handle (12); A plug connection assembly (30), the plug connection assembly (30) comprising an inner plug-in sleeve (31) and an outer plug-in sleeve (32) which are coaxially arranged, the clamping sleeve being detachably connected to the inner plug-in sleeve (31), the outer portion of the outer plug-in sleeve (32) being slidably connected to a locking sleeve (33), and an unlocking sleeve (34) for driving the locking sleeve (33) to move.

2. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 1, characterized in that: A positioning groove (14) is provided on the outer wall of the tail handle (12) for positioning the tail handle (12) axially and circumferentially in the clamping sleeve; The fixed jacket comprises a large-diameter sleeve (23) and a small-diameter jacket (24) fixedly connected to one end of the large-diameter sleeve (23); One end of the movable jacket (22) is rotatably connected to one end of the large-diameter sleeve (23) via a rotating shaft (29), and is snap-connected to the small-diameter jacket (24); A positioning block (28) adapted to the positioning groove (14) is provided on the inner wall of the movable jacket (22) and the small-diameter jacket (24) at one end away from the large-diameter sleeve (23).

3. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 2, characterized in that: The cross-sections of the movable jacket (22) and the small-diameter jacket (24) are both "C"-shaped structures. When the movable jacket (22) and the small-diameter jacket (24) are interlocked, a tube structure with four sides being closed is formed. The movable jacket (22) is symmetrically provided with elastic clamping arms (25) on both sides close to the small-diameter jacket (24), and the small-diameter jacket (24) is symmetrically provided with bosses snap-connected with the elastic clamping arms (25) on both sides.

4. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 2, characterized in that: One end of the large diameter sleeve (23) away from the small diameter jacket (24) is coaxially connected to a tail end sleeve (26), and an annular limiting groove is formed between the tail end sleeve (26) and the large diameter sleeve (23); The adapter sleeve assembly (20) also includes a first locking nut (27) which is rotatably connected in the annular limiting groove and is threadedly connected to the end of the inner plug-in sleeve (31).

5. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 1, characterized in that: The front end opening of the outer plug-in sleeve (32) is retracted, and the front end of the inner plug-in sleeve (31) is provided with a retaining ring (31a) that abuts against the front end opening of the outer plug-in sleeve (32); The end of the outer plug-in sleeve (32) is threadedly connected with a second locking nut (38) for axially locking the inner plug-in sleeve (31) within the outer plug-in sleeve (32).

6. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 1, characterized in that: A locking groove (32c) for locking a plug (40) or an adapter is provided on the outer wall of the external plug-in sleeve (32), and a locking block (33a) located outside the locking groove (32c) is provided at one end of the locking sleeve (33), and the locking block (33a) extends in the axial direction of the locking sleeve (33); An elastic arm (32a) is also provided on the outer wall of the external plug-in sleeve (32), one end of the elastic arm (32a) is a fixed end and is fixedly connected to the external plug-in sleeve (32), and one end of the elastic arm (32a) is a free end and is provided with a barb (32b) for axially limiting the locking sleeve (33).

7. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 6, characterized in that: The outer wall of the outer plug-in sleeve (32) is provided with a compression spring (37) which elastically pushes the locking sleeve (33) to move toward the direction approaching the barb (32b) and the locking groove (32c); The locking sleeve (33) is coaxially located inside the unlocking sleeve (34), and a baffle (34a) is provided on the inner wall of the unlocking sleeve (34) for pushing the locking sleeve (33) to move in a direction away from the barb (32b) and the locking groove (32c); A ring sleeve (35) is rotatably connected to the outer wall of the unlocking sliding sleeve (34), and a pull rope (36) is connected to the ring sleeve (35) for pulling the unlocking sliding sleeve (34) to slide toward the end of the external plug-in sleeve (32).

8. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 1, characterized in that: A first sealing ring (39) sealingly connected to the unlocking sleeve (34) is provided on the outer wall of the end of the external plug-in sleeve (32), and a second sealing ring (41) sealingly connected to a plug (40) or an adapter is provided on the inner wall of the unlocking sleeve (34) near the front end of the external plug-in sleeve (32).

9. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 1, characterized in that: The ceramic ferrule assembly further comprises a ceramic ferrule seat (15) connected to the front end of the tail handle (12); the front end of the ceramic ferrule seat (15) is connected to a ceramic ferrule (16); and a telescopic spring (17) is connected between the ceramic ferrule seat (15) and the tail handle (12); The front end of the tail handle (12) is threadedly connected with a traction cap (18); the ceramic ferrule seat (15), the ceramic ferrule (16) and the telescopic spring (17) are all located in the traction cap (18); and the front end of the traction cap (18) is provided with a traction hole.

10. A miniaturized optical fiber connector for small pipeline construction as claimed in claim 9, characterized in that: A third sealing ring (19) is provided on the tail handle (12), and the third sealing ring (19) is sealingly connected to the inner wall of the opening of the traction cap (18).

Images