Optical fiber connector assembly and optical fiber connector tube assembly

Abstract

The present invention discloses an optical fiber connector assembly and an optical fiber connector tube-threading assembly, belonging to the technical field of optical fiber connectors, comprising an optical fiber connector, a first dust cap and a tube-threading fitting, wherein the tail end of the optical fiber connector is connected to the optical fiber cable; the first dust cap is detachably mounted on the head end of the optical fiber connector to achieve dustproof and / or waterproof sealing of the optical fiber connector, and the tube-threading fitting has at least one second dust cap, and the second dust cap is detachably mounted on the head end of the optical fiber connector to achieve dustproof and / or waterproof sealing of the optical fiber connector; the outer diameter of the second dust cap is smaller than the outer diameter of the first dust cap; the first dust cap and the second dust cap can both be detachably mounted on the optical fiber connector, so the two can be replaced and used according to actual conditions; since the outer diameter of the second dust cap is smaller than the outer diameter of the first dust cap, it can pass through the pipeline more easily while still maintaining the dustproof and waterproof sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber connectors, and in particular to an optical fiber connector assembly and an optical fiber connector tube assembly. Background Art

[0002] The fiber optic connector is the key part for connecting the optical fiber to other devices. It plays the role of fixing the optical fiber, aligning the optical signal transmission path, and protecting the optical fiber end face. When the optical fiber is not in use, the dust cap is covered on the optical fiber connector to prevent dust, oil and other impurities from entering the connector and affecting the transmission quality of the optical signal. Different types of optical fiber connectors have different names, such as the common SC connector, LC connector, FC connector, etc. These connectors are different in shape, size, connection method, etc., but they can all be used with the corresponding dust cap.

[0003] Due to the size limitation of the dust cap and the limited tools for on-site installation, one end of the fiber optic connector will be fixedly connected to a shell on its outside during the factory assembly process, and the dust cap is generally installed on the shell at the fiber optic connector by threading. Currently, the installation of fiber optic cables needs to be threaded through pipes to the customer's location. Since the size of the dust cap and the end shell of the fiber optic connector is too large, it will affect the normal threading of the fiber optic cable (especially for small-sized pipes).

[0004] Therefore, it is necessary to provide an optical fiber connector assembly and an optical fiber connector tube assembly. Summary of the invention

[0005] The embodiments of the present invention provide an optical fiber connector assembly and an optical fiber connector tube assembly to solve the problems in the prior art.

[0006] The embodiment of the present invention adopts the following technical scheme: an optical fiber connector assembly, comprising an optical fiber connector, a first dust cap and a tube threading fitting, wherein the tail end of the optical fiber connector is connected to the optical fiber cable; the first dust cap is detachably installed at the head end of the optical fiber connector to achieve dust-proof and / or waterproof sealing of the optical fiber connector, and the tube threading fitting has at least one second dust cap, which is detachably installed at the head end of the optical fiber connector to achieve dust-proof and / or waterproof sealing of the optical fiber connector; the outer diameter of the second dust cap is smaller than the outer diameter of the first dust cap.

[0007] Preferably, at least one sealing ring is installed on the outer peripheral wall of the optical fiber connector, and when the first dust cap or the second dust cap is installed on the optical fiber connector, a sealed connection is achieved through the sealing ring.

[0008] Preferably, the pipe fitting also includes an internally threaded sleeve and a traction seat, and a threaded groove is formed at one end of the second dust cap away from its opening, and the internally threaded sleeve is threadedly connected in the threaded groove and is coaxially arranged with the second dust cap; the connecting portion on the traction seat is embedded in the internally threaded sleeve, and is positioned between the first limiting wall and the second dust cap end through the first limiting wall at the end of the internally threaded sleeve, and the connecting portion and the first limiting wall are rotationally matched.

[0009] Preferably, the thread groove is configured as an embedded structure, that is, the outer diameter of the thread groove is smaller than the outer diameter of the second dust cap, and the outer diameter of the internally threaded sleeve is consistent with the outer diameter of the second dust cap.

[0010] Preferably, at least one columnar protrusion is further provided on the outer peripheral wall of the optical fiber connector, and a first mounting groove is formed at the opening end of the second dust cap, and the protrusion is embedded in the first mounting groove to realize the clamping connection between the second dust cap and the optical fiber connector.

[0011] Preferably, the first mounting groove includes a first groove extending from the opening end of the second dust cap along its axis, and a second groove located at the end of the first groove and extending along the circumferential direction of the second dust cap, and a first elastic limiting portion is formed on a side wall at the end of the second groove, and the protrusion enters the second groove along the first groove and passes over the first elastic limiting portion by squeezing the first elastic limiting portion to elastically deform it, so as to be locked at the end of the second groove.

[0012] Preferably, the connector assembly also includes: an elastic ferrule, having a gap running through its body along its length direction, and the elastic ferrule is sleeved on the optical fiber cable through the gap; an inner sleeve, sleeved on the optical fiber connector and the two are clamped together, the inner sleeve is formed with an external thread at one end close to the optical fiber cable, and a first flange is formed at the outer wall of the other end of the inner sleeve; an outer sleeve, at least partially sleeved on the inner sleeve, and an inner bulge is formed on its inner wall; a tail sleeve, a second limiting wall and a first internal thread are formed on its inner wall, and the tail sleeve is sleeved on the inner sleeve and the elastic ferrule; the tail sleeve is threadedly connected to the external thread of the inner sleeve through the first internal thread, and pushes the second flange on the outer wall of the elastic ferrule through the second limiting wall, so that the elastic ferrule abuts against the third flange at the outer wall of the optical fiber connector, and the end of the tail sleeve away from the optical fiber cable pushes the inner bulge to move and abut against the first flange; the first dust cap at least partially extends into the outer sleeve and is threadedly connected thereto.

[0013] Preferably, the outer sleeve is connected to the first dust cap via a connecting rope.

[0014] Preferably, a sealing ring is installed at one end of the inner sleeve away from the optical fiber cable, and the opening end of the first dust cap abuts against the sealing ring.

[0015] Preferably, at least one columnar protrusion is further provided on the outer peripheral wall of the optical fiber connector, a second mounting groove is formed at one end of the inner sleeve, and the protrusion is embedded in the second mounting groove to realize the clamping connection between the inner sleeve and the optical fiber connector.

[0016] Preferably, the second mounting groove includes a third groove extending from one end of the inner sleeve along its axis, and a fourth groove located at the end of the third groove and extending along the circumferential direction of the inner sleeve, a second elastic limiting portion is formed on a side wall at the end of the fourth groove, the protrusion enters the fourth groove along the third groove and passes over the second elastic limiting portion by squeezing the second elastic limiting portion to elastically deform it, so as to be locked at the end of the fourth groove.

[0017] A fiber optic connector tube assembly includes a fiber optic connector and a tube fitting, wherein the tail end of the fiber optic connector is connected to the optical fiber cable; the tube fitting has at least one second dust cap, which is detachably mounted on the head end of the fiber optic connector to achieve dustproof and / or waterproof sealing of the fiber optic connector, and the diameter of the second dust cap is less than or equal to 11.5 mm.

[0018] Preferably, at least one sealing ring is installed on the outer peripheral wall of the optical fiber connector, and when the first dust cap or the second dust cap is installed on the optical fiber connector, a sealed connection is achieved through the sealing ring.

[0019] Preferably, the pipe fitting also includes an internally threaded sleeve and a traction seat, and a threaded groove is formed at one end of the second dust cap away from its opening, and the internally threaded sleeve is threadedly connected in the threaded groove and is coaxially arranged with the second dust cap; the connecting portion on the traction seat is embedded in the internally threaded sleeve, and is positioned between the first limiting wall and the second dust cap end through the first limiting wall at the end of the internally threaded sleeve, and the connecting portion and the first limiting wall are rotationally matched.

[0020] Preferably, the maximum diameters of the internally threaded sleeve and the traction seat are both smaller than or equal to the diameter of the second dust cap.

[0021] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0022] First, both the first dust cap and the second dust cap can be detachably mounted on the optical fiber connector, so they can be replaced according to actual conditions. When the optical fiber connector needs to pass through a pipe, the pipe-through fitting comes into play. Put the pipe-through fitting on the outside of the optical fiber connector, and then install the second dust cap on the head end of the optical fiber connector. Since the outer diameter of the second dust cap is smaller than the outer diameter of the first dust cap, it can pass through the pipe more easily while still maintaining the dustproof and waterproof sealing effect.

[0023] Secondly, by providing an internal threaded sleeve and a traction seat at the outer end of the second dust cap, when the traction seat is rotated and pulled by the traction rope, the connecting part of the traction seat can rotate between the first limiting wall and the end of the second dust cap, thereby avoiding the rotation of the second dust cap and the optical fiber cable, thereby effectively avoiding damage to the optical fiber cable caused by twisting during the pipe threading process.

[0024] Thirdly, the first dust cap is installed on the optical fiber cable in an assembled manner through an elastic ferrule, an inner sleeve, an outer sleeve and a tail sleeve. Therefore, when the second dust cap needs to be replaced, several parts on the outside of the optical fiber cable (i.e., the elastic ferrule, the inner sleeve, the outer sleeve and the tail sleeve) can be removed, and only the main structure of the optical fiber connector is retained. Therefore, the size of the optical fiber connector (referring to its diameter) can be guaranteed as much as possible. After the second dust cap is assembled on the optical fiber connector, the size of the overall structure is guaranteed, which facilitates the second dust cap and the optical fiber connector to pass through a smaller pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the optical fiber connector of the present invention after the first dust cap is installed;

[0027] Figure 2 A sectional view of the three-dimensional structure of the optical fiber connector of the present invention after the first dust cap is installed;

[0028] Figure 3 For the present invention Figure 2 A local enlarged view of point A in FIG.

[0029] Figure 4 For the present invention Figure 2 A local enlarged view of point B in FIG.

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the optical fiber connector, optical fiber cable and elastic ferrule of the present invention;

[0031] Figure 6 An exploded view of the overall structure of the optical fiber connector of the present invention after the first dust cap is installed;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the optical fiber connector and the inner sleeve of the present invention;

[0033] Figure 8 An exploded view of the inner sleeve and the outer sleeve of the present invention;

[0034] Fig. 9It is a three-dimensional structural exploded diagram of the elastic ferrule, the outer sleeve and the tail sleeve of the present invention;

[0035] Fig.10 A schematic diagram of the three-dimensional structure of the optical fiber connector of the present invention after the second dust cap is installed;

[0036] Fig.11 A sectional view of the three-dimensional structure of the optical fiber connector of the present invention after the second dust cap is installed;

[0037] Fig.12 It is an exploded view of the pipe fitting in the present invention;

[0038] Reference numerals

[0039] 1-fiber optic connector; 11-sealing ring; 12-bump; 13-third flange; 2-first dust cap; 21-connecting rope; 3-tube fitting; 31-second dust cap; 311-threaded groove; 312-first mounting groove; 3121-first slot; 3122-second slot; 3123-first elastic limiting part; 32-inner threaded sleeve; 321-first limiting wall; 33-traction seat; 331-connecting part; 4-fiber optic cable; 5-elastic ferrule; 51-gap; 52-second flange; 6-inner sleeve; 61-external thread; 62-first flange; 63-sealing ring; 64-second mounting groove; 641-third slot; 642-fourth slot; 643-second elastic limiting part; 7-outer sleeve; 71-inner convex block; 8-tail sleeve; 81-second limiting wall; 82-first inner thread. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0042] Reference Figures 1 to 12As shown, an embodiment of the present invention provides a fiber optic connector assembly, including a fiber optic connector 1, a first dust cap 2 and a tube fitting 3, wherein the tail end of the fiber optic connector 1 is connected to the optical fiber cable 4; the first dust cap 2 is detachably mounted on the head end of the fiber optic connector 1 to achieve dust-proof and / or waterproof sealing of the fiber optic connector 1, and the tube fitting 3 has at least one second dust cap 31, which is detachably mounted on the head end of the fiber optic connector 1 to achieve dust-proof and / or waterproof sealing of the fiber optic connector 1; the outer diameter of the second dust cap 31 is smaller than the outer diameter of the first dust cap 2.

[0043] In this embodiment, the optical fiber connector 1 is the core part of the entire connector assembly, connected to the end of the optical fiber cable 4, and is convenient for the transmission of optical fiber signals. The first dust cap 2 is detachably mounted on the head end of the optical fiber connector 1, and is designed to prevent dust and other particles from entering the interior of the optical fiber connector 1, while also achieving a waterproof and sealing effect. The structural design of the first dust cap 2 takes into account the compatibility with the optical fiber connector 1, ensuring the convenience of installation and the sealing effect.

[0044] The tube fitting 3 has at least one second dust cap 31. The second dust cap 31 is also detachably mounted on the head end of the optical fiber connector 1, and similar to the first dust cap 2, its function is also dustproof and waterproof sealing. Both the first dust cap 2 and the second dust cap 31 can be detachably mounted on the optical fiber connector 1, so they can be replaced according to actual conditions.

[0045] When the optical fiber connector 1 needs to pass through a pipe, the pipe fitting 3 comes into play. The pipe fitting 3 is put on the outside of the optical fiber connector 1, and then the second dust cap 31 is installed on the head end of the optical fiber connector 1. Since the outer diameter of the second dust cap 31 is smaller than the outer diameter of the first dust cap 2, it can pass through the pipe more easily while still maintaining the dustproof and waterproof sealing effect.

[0046] In some practical applications, such as Figure 2 , 3 and Fig.11 As shown, at least one sealing ring 11 is installed on the outer peripheral wall of the optical fiber connector 1. When the first dust cap 2 is installed on the optical fiber connector 1, a sealed connection is achieved through the sealing ring 11. When the second dust cap 31 is installed on the optical fiber connector 1, a sealed connection is also achieved through the sealing ring 11. As shown in the figure, in this embodiment, by configuring two sealing rings 11, the sealing effect can be further enhanced.

[0047] In some practical applications, considering the external environment during the optical fiber pipe threading process, a traction machine is sometimes used to pull the optical fiber forward in the pipe.

[0048] The tractor can provide a stable and continuous pulling force to overcome the friction and resistance of the optical fiber when it moves forward in the pipeline. For long-distance pipeline threading or when the internal conditions of the pipeline are more complicated (such as bends, diameter changes, etc.), the pulling force of the tractor can ensure that the optical fiber passes through the pipeline smoothly. For example, when laying optical fiber in urban underground communication pipelines, since the pipeline length may reach several kilometers or even longer, it is very difficult to pull the optical fiber manually. At this time, the tractor plays an important role.

[0049] In rare cases, such as when there is a serious blockage or obstacle in the pipeline that cannot be cleared by conventional methods, the optical fiber may be rotated to a certain extent to find a different path to pass through the obstacle. Therefore, in this case, the rotation of the optical fiber in the pipeline may cause some problems, such as the optical fiber cable 4 being twisted due to long-term rotation, affecting the performance and service life of the optical fiber.

[0050] Therefore, in the face of the above situation, the pipe fitting 3 is further optimized and designed, such as Figures 10 to 12 As shown, the pipe fitting 3 is added with an internal threaded sleeve 32 and a traction seat 33 on the basis of the second dust cap 31 .

[0051] Specifically, a thread groove 311 is formed at one end of the second dust cap 31 away from the opening thereof, and the internal thread sleeve 32 is threadedly connected in the thread groove 311 and is coaxially arranged with the second dust cap 31; the connecting portion 331 on the traction seat 33 is embedded in the internal thread sleeve 32, and is positioned between the first limiting wall 321 and the end of the second dust cap 31 through the first limiting wall 321 at the end of the internal thread sleeve 32, and the connecting portion 331 is rotatably matched with the first limiting wall 321, and the traction seat 33 is used to be fixedly connected with the traction rope (the traction rope refers to the traction end of the traction machine), and a pull ring can be provided on the traction seat 33 so that the traction rope can be fixed on the traction seat 33. When the traction seat 33 is rotated and pulled by the traction rope, the connecting portion 331 of the traction seat 33 can rotate between the first limiting wall 321 and the end of the second dust cap 31, thereby preventing the second dust cap 31 and the optical fiber cable 4 from rotating, thereby effectively preventing the optical fiber cable 4 from being damaged by twisting during the pipe threading process.

[0052] In some practical applications, such as Figures 10 to 12As shown, based on the above foundation, the thread groove 311 is set as an embedded structure, that is, the outer diameter of the thread groove 311 is smaller than the outer diameter of the second dust cap 31, and the outer diameter of the internal thread sleeve 32 is consistent with the outer diameter of the second dust cap 31. Therefore, it can be ensured that the maximum diameter of the entire pipe fitting 3 is the diameter of the second dust cap 31, thereby effectively ensuring the passability of the entire pipe fitting 3, which is convenient for it to guide the optical fiber cable 4 through a smaller pipe. In practical applications, for the 5-6mm optical fiber cable 4, the diameter of the second dust cap 31 is less than or equal to 11.5mm, which greatly improves the passability of the entire cable compared to directly using the currently commonly used large-diameter 18mm dust cap (i.e., the first dust cap 2).

[0053] In some practical applications, such as Figures 10 to 12 As shown, at least one columnar protrusion 12 is also provided at the outer peripheral wall of the optical fiber connector 1, and a first mounting groove 312 is formed at the open end of the second dust cap 31, and the protrusion 12 is embedded in the first mounting groove 312 to realize the clamping connection between the second dust cap 31 and the optical fiber connector 1. Specifically, the first mounting groove 312 includes a first groove 3121 extending from the open end of the second dust cap 31 along its axis, and a second groove 3122 located at the end of the first groove 3121 and extending along the circumferential direction of the second dust cap 31, and a first elastic limiting portion 3123 is formed on a side wall at the end of the second groove 3122, and the protrusion 12 enters the second groove 3122 along the first groove 3121 and passes over the first elastic limiting portion 3123 by squeezing the first elastic limiting portion 3123 to elastically deform it, so as to be locked at the end of the second groove 3122. Therefore, when installing, the second dust cap 31 is put on the optical fiber connector 1 so that the protrusion 12 enters the first slot 3121. Then, the second dust cap 31 is rotated so that the protrusion 12 is locked at the end of the second slot 3122. This design makes the connection of the second dust cap 31 easier.

[0054] In some practical applications, based on any one or more of the above embodiments, such as Figures 2 to 9 As shown, the joint assembly also includes an elastic sleeve 5, an inner sleeve 6, an outer sleeve 7 and a tail sleeve 8.

[0055] The elastic ferrule 5 is sleeved on the optical fiber cable 4 . Specifically, the elastic ferrule 5 has a gap 51 penetrating the body thereof along the length direction thereof. The elastic ferrule 5 is sleeved on the optical fiber cable 4 through the gap 51 .

[0056] The inner sleeve 6 is sleeved on the optical fiber connector 1 and the two are clamped together. An external thread 61 is formed on one end of the inner sleeve 6 close to the optical fiber cable 4, and a first flange 62 is formed on the outer wall of the other end of the inner sleeve 6; the outer sleeve 7 is at least partially sleeved on the inner sleeve 6, and an inner protrusion 71 is formed on its inner wall; the tail sleeve 8 is formed with a second limiting wall 81 and a first internal thread 82 on its inner wall, and the tail sleeve 8 is sleeved on the inner sleeve 6 and the elastic clamping sleeve 5.

[0057] The tail sleeve 8 is threadedly connected to the external thread 61 of the inner sleeve 6 through the first internal thread 82, and pushes the second flange 52 on the outer wall of the elastic sleeve 5 through the second limiting wall 81, so that the elastic sleeve 5 abuts against the third flange 13 on the outer wall of the optical fiber connector 1, and the end of the tail sleeve 8 away from the optical fiber cable 4 pushes the inner protrusion 71 to move and abut against the first flange 62; the first dust cap 2 at least partially extends into the outer sleeve 7 and is threadedly connected thereto. Thus, the connection of the first dust cap 2 is realized. In this embodiment, the first dust cap 2 is installed on the optical fiber cable 4 in an assembled manner through the elastic sleeve 5, the inner sleeve 6, the outer sleeve 7 and the tail sleeve 8. Therefore, when the second dust cap 31 needs to be replaced, the several parts on the outside of the optical fiber cable 4 (i.e., the elastic sleeve 5, the inner sleeve 6, the outer sleeve 7 and the tail sleeve 8) can be removed, and only the main structure of the optical fiber connector 1 is retained. Therefore, the size of the optical fiber connector 1 (referring to its diameter) can be guaranteed as much as possible. After the second dust cap 31 is assembled on the optical fiber connector 1, the size of the overall structure is guaranteed, which facilitates the second dust cap 31 and the optical fiber connector 1 to pass through a smaller pipe. At the same time, when installing or replacing different dust caps, it can be completed only by manual operation, and there is no need to use external tools to fix it on the cable connector.

[0058] Specifically, the outer sleeve 7 is connected to the first dust cap 2 by a connecting rope 21. Therefore, after the optical fiber cable 4 is installed at the destination, the staff can remove the tube fitting 3 and install the first dust cap 2 through the elastic sleeve 5, inner sleeve 6, outer sleeve 7 and tail sleeve 8. The outer sleeve 7 is connected to the first dust cap 2 by the connecting rope 21. When the staff removes the first dust cap 2, the connection relationship between the first dust cap 2 and the outer sleeve 7 is still guaranteed, thereby avoiding the loss of the first dust cap 2 due to long-term non-use.

[0059] Specifically, a sealing ring 63 is installed at one end of the inner sleeve 6 away from the optical fiber cable 4 , and the opening end of the first dust cap 2 abuts against the sealing ring 63 , further ensuring the sealing performance of the first dust cap 2 .

[0060] Regarding the connection method between the inner sleeve 6 and the optical fiber connector 1, in some practical applications, reference may be made to the connection method between the second dust cap 31 and the optical fiber connector 1, and the following implementation methods may be specifically adopted:

[0061] like Figure 5 and Figure 7 As shown, at least one columnar protrusion 12 (i.e., the protrusion 12 on the optical fiber connector 1 connected to the second dust cap 31) is also provided on the outer peripheral wall of the optical fiber connector 1, and the second dust cap 31 and the inner sleeve 6 share the same protrusion 12 to achieve respective connection to the optical fiber connector 1, and a second mounting groove 64 is formed at one end of the inner sleeve 6, and the protrusion 12 is embedded in the second mounting groove 64 to achieve the clamping connection between the inner sleeve 6 and the optical fiber connector 1.

[0062] Specifically, the second mounting groove 64 includes a third groove 641 extending from one end of the inner sleeve 6 along its axis, and a fourth groove 642 located at the end of the third groove 641 and extending along the circumferential direction of the inner sleeve 6. A second elastic limiting portion 643 is formed on a side wall at the end of the fourth groove 642. The protrusion 12 enters the fourth groove 642 along the third groove 641 and elastically deforms the second elastic limiting portion 643 by squeezing the second elastic limiting portion 643 to pass through the second elastic limiting portion 643 to be locked at the end of the fourth groove 642.

[0063] refer to Figures 10 to 12 As shown, the present invention also provides a fiber optic connector tube assembly, including a fiber optic connector 1 and a tube fitting 3, wherein the tail end of the fiber optic connector 1 is connected to the fiber optic cable 4; the tube fitting 3 has at least one second dust cap 31, and the second dust cap 31 is detachably installed on the head end of the fiber optic connector 1 to achieve dustproof and / or waterproof sealing of the fiber optic connector 1, and the diameter of the second dust cap 31 is less than or equal to 11.5 mm, so that the fiber optic cable 4 and the fiber optic connector 1 can pass through a small diameter pipe, mainly for pipes larger than 12 mm.

[0064] Specifically, at least one sealing ring 11 is installed on the outer peripheral wall of the optical fiber connector 1, and when the first dust cap 2 or the second dust cap 31 is installed on the optical fiber connector 1, a sealed connection is achieved through the sealing ring 11.

[0065] In other practical applications, such as Figures 10 to 12 As shown, the pipe fitting 3 further includes an internal threaded sleeve 32 and a traction seat 33. A thread groove 311 is provided at one end of the second dust cap 31 away from its opening. The internal threaded sleeve 32 is threadedly connected in the thread groove 311 and is coaxially arranged with the second dust cap 31. The connecting portion 331 on the traction seat 33 is embedded in the internal threaded sleeve 32 and is positioned between the first limiting wall 321 and the end of the second dust cap 31 through the first limiting wall 321 at the end of the internal threaded sleeve 32. The connecting portion 331 is rotatably matched with the first limiting wall 321. Specifically, the maximum diameters of the internal threaded sleeve 32 and the traction seat 33 are both less than or equal to the diameter of the second dust cap 31.

[0066] In this embodiment, the pipe fitting 3 has a traction seat 33 that can rotate relative to the second dust cap 31, so as to prevent the optical fiber cable 4 from twisting and rotating when the optical fiber cable 4 is pulled through the pipe, thereby preventing the optical fiber cable 4 from being damaged.

[0067] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An optical fiber connector assembly, characterized in that: The optical fiber connector (1) comprises a first dust cap (2) and a tube-threading fitting (3), wherein the tail end of the optical fiber connector (1) is connected to the optical fiber cable (4); the first dust cap (2) is detachably mounted on the head end of the optical fiber connector (1) to achieve dustproof and / or waterproof sealing of the optical fiber connector (1); the tube-threading fitting (3) comprises at least one second dust cap (31), wherein the second dust cap (31) is detachably mounted on the head end of the optical fiber connector (1) to achieve dustproof and / or waterproof sealing of the optical fiber connector (1); the outer diameter of the second dust cap (31) is smaller than the outer diameter of the first dust cap (2); At least one columnar protrusion (12) is also provided on the outer peripheral wall of the optical fiber connector (1), a first mounting groove (312) is formed at the open end of the second dust cap (31), and the protrusion (12) is embedded in the first mounting groove (312) to realize the clamping connection between the second dust cap (31) and the optical fiber connector (1); The connector assembly further comprises: an elastic ferrule (5), having a gap (51) penetrating the body thereof along its length direction, the elastic ferrule (5) being sleeved on the optical fiber cable (4) through the gap (51); an inner sleeve (6), sleeved on the optical fiber connector (1) and clamped therebetween, an outer thread (61) being formed at one end of the inner sleeve (6) close to the optical fiber cable (4), and a first flange (62) being formed at the outer wall of the other end of the inner sleeve (6); an outer sleeve (7), at least partially sleeved on the inner sleeve (6), and having an inner convex block (71) formed on its inner wall; a tail sleeve (8), having a second limiting wall (81) and a first inner thread (82) formed on its inner wall, the tail sleeve (8) being sleeved on the inner sleeve (6) and the elastic ferrule (5); The tail sleeve (8) is threadedly connected to the external thread (61) of the inner sleeve (6) via the first internal thread (82), and pushes the second flange (52) on the outer wall of the elastic sleeve (5) via the second limiting wall (81), so that the elastic sleeve (5) abuts against the third flange (13) on the outer wall of the optical fiber connector (1), and the end of the tail sleeve (8) away from the optical fiber cable (4) pushes the inner protrusion (71) to move and abut against the first flange (62); the first dust cap (2) at least partially extends into the outer sleeve (7) and is threadedly connected thereto; A second mounting groove (64) is formed at one end of the inner sleeve (6), and the protrusion (12) is embedded in the second mounting groove (64) to achieve a snap connection between the inner sleeve (6) and the optical fiber connector (1).

2. The optical fiber connector assembly according to claim 1, characterized in that: At least one sealing ring (11) is installed on the outer peripheral wall of the optical fiber connector (1); when the first dust cap (2) or the second dust cap (31) is installed on the optical fiber connector (1), a sealed connection is achieved through the sealing ring (11).

3. The optical fiber connector assembly according to claim 1, characterized in that: The pipe fitting (3) further comprises an internally threaded sleeve (32) and a traction seat (33); a thread groove (311) is formed at one end of the second dust cap (31) away from its opening; the internally threaded sleeve (32) is threadedly connected in the thread groove (311) and is coaxially arranged with the second dust cap (31); a connecting portion (331) on the traction seat (33) is embedded in the internally threaded sleeve (32) and is positioned between the first limiting wall (321) and the end of the second dust cap (31) through a first limiting wall (321) at the end of the internally threaded sleeve (32); the connecting portion (331) is rotatably engaged with the first limiting wall (321).

4. The optical fiber connector assembly according to claim 3, characterized in that: The thread groove (311) is configured as an embedded structure, that is, the outer diameter of the thread groove (311) is smaller than the outer diameter of the second dust cap (31), and the outer diameter of the internal thread sleeve (32) is consistent with the outer diameter of the second dust cap (31).

5. The optical fiber connector assembly according to claim 1, characterized in that: The first mounting groove (312) comprises a first groove (3121) extending from the open end of the second dust cap (31) along its axis, and a second groove (3122) located at the end of the first groove (3121) and extending along the circumferential direction of the second dust cap (31), a first elastic limiting portion (3123) being formed on a side wall at the end of the second groove (3122), the protrusion (12) entering the second groove (3122) along the first groove (3121) and passing over the first elastic limiting portion (3123) by squeezing the first elastic limiting portion (3123) to elastically deform it, so as to be locked at the end of the second groove (3122).

6. The optical fiber connector assembly according to claim 1, characterized in that: The outer sleeve (7) and the first dust cap (2) are connected via a connecting rope (21).

7. The optical fiber connector assembly according to claim 1, characterized in that: A sealing ring (63) is installed at one end of the inner sleeve (6) away from the optical fiber cable (4), and the opening end of the first dust cap (2) abuts against the sealing ring (63).

8. The optical fiber connector assembly according to claim 1, characterized in that: The second mounting groove (64) comprises a third groove (641) extending from one end of the inner sleeve (6) along its axis, and a fourth groove (642) located at the end of the third groove (641) and extending along the circumferential direction of the inner sleeve (6), a second elastic limiting portion (643) being formed on a side wall at the end of the fourth groove (642), the protrusion (12) entering the fourth groove (642) along the third groove (641) and passing over the second elastic limiting portion (643) by squeezing the second elastic limiting portion (643) to elastically deform it, so as to be locked at the end of the fourth groove (642).

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