Optical fiber connector assembly

Abstract

The utility model discloses an optical fiber connector assembly, which belongs to the technical field of optical fiber connectors, and comprises an optical fiber connector, the tail end of which is connected with an optical fiber cable; the pipe penetrating fitting is at least provided with a first dustproof cap and a traction seat, the first dustproof cap is detachably installed at the head end of the optical fiber connector so as to achieve dustproof and / or waterproof sealing of the optical fiber connector, and the traction seat is rotationally connected to the head end of the first dustproof cap; the first dustproof cap and the traction seat are arranged, the traction seat is rotatably arranged at the head end of the first dustproof cap, and the traction seat is fixedly connected with the pull rope, so that the traction seat and the first dustproof cap rotate relatively in the process that the whole optical fiber cable is pulled by the pull rope to penetrate through a pipe, and rotation of the first dustproof cap and the optical fiber cable is avoided; therefore, the optical fiber cable can be effectively prevented from being damaged due to distortion in the pipe penetrating process.

Description

Technical Field

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

[0002] Fiber optic connectors are key components for connecting optical fibers to other devices. They secure the fiber, align the optical signal transmission path, and protect the fiber end face. Dust caps, when not in use, prevent dust, oil, and other impurities from entering the connector and affecting the transmission quality of the optical signal. Different types of fiber optic connectors have different names, such as the common SC connector, LC connector, and FC connector. These connectors vary in shape, size, and connection method, but all can be used with the corresponding dust caps.

[0003] Currently, fiber optic cables are installed through conduits to customer locations. Dust caps are typically installed on fiber optic connectors through snap-on or threaded connections. Furthermore, workers pull the fiber optic cables to advance through the conduits during the installation process. Due to the complex environment within the conduits, the existing pulling method inevitably causes the fiber optic cables to twist or rotate. Since fiber optic cables contain glass fibers, twisting and rotation can affect the performance and service life of the optical fibers.

[0004] Therefore, it is necessary to provide an optical fiber connector assembly that can prevent the optical fiber cable from twisting or rotating during the pipe threading process. Utility Model Content

[0005] The embodiment of the present utility model provides an optical fiber connector assembly to solve the problems in the prior art.

[0006] The embodiment of the present utility model adopts the following technical solution: an optical fiber connector assembly, comprising: an optical fiber connector, the tail end of which is connected to the optical fiber cable; a tube fitting, the tube fitting having at least a first dust cap and a traction seat, the first dust cap being 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 traction seat being rotatably connected to the head end of the first dust cap.

[0007] Preferably, it further comprises a protective shell assembly, which is detachably mounted on the optical fiber connector.

[0008] Preferably, the shell of the optical fiber connector is a tubular structure, and an external thread coaxial with the shell is provided on the outer peripheral wall of the shell, and an internal thread coaxial with the shell is at least partially provided on the inner side wall of the first dust cap; the open end of the first dust cap is inserted into the optical fiber connector and is threadedly connected to the internal thread through the external thread, so that the first dust cap is installed on the optical fiber connector.

[0009] Preferably, an outer flange coaxial with the optical fiber cable is provided at one end of the housing close to the optical fiber cable, and when the first dust cap is installed on the optical fiber cable, the open end of the first dust cap abuts against the outer flange.

[0010] Preferably, the pipe fitting also includes an internally threaded sleeve, and a threaded groove is formed at one end of the first dust cap away from its opening. The internally threaded sleeve is threadedly connected in the threaded groove and is coaxially arranged with the first 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 end of the first dust cap through the first limiting wall at the end of the internally threaded sleeve, and the connecting portion and the first limiting wall are rotationally engaged.

[0011] 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 first dust cap, and the maximum diameters of the internally threaded sleeve and the traction seat are both smaller than or equal to the diameter of the first dust cap.

[0012] Preferably, a pull ring is provided on the traction seat.

[0013] Preferably, the optical fiber connector assembly also includes a protective shell assembly, which is composed of an inner shell and an outer shell. The inner shell is sleeved on the optical fiber connector and abuts against the outer flange. The shell is also provided with an inner bevel groove coaxial with the shell. The diameter of the inner bevel groove gradually decreases from the outer flange to the head end of the optical fiber connector. At least one elastic arm is provided on the inner shell, and the outer shell has an inner cavity adapted to the external shape of the inner shell. When the outer shell is sleeved on the inner shell, an inner wall of the outer shell squeezes the elastic arm inward so that the elastic arm is embedded in the inner bevel groove. The movable end of the elastic arm is located at one end of the small diameter of the inner bevel groove and abuts against the end wall of the inner bevel groove.

[0014] Preferably, the protective shell assembly further includes a second dust cap, which is sleeved on the ferrule in the optical fiber connector, and the second dust cap is at least partially located inside the inner shell.

[0015] Preferably, a first limiting portion and a second limiting portion are provided on at least one side wall of the inner shell, and a third limiting portion and a fourth limiting portion protruding inwardly are provided on at least one side wall of the outer shell. When the outer shell is inserted into the outer shell, the third limiting portion is squeezed by the first limiting portion and elastically deformed outward to pass over the first limiting portion, so that the third limiting portion and the fourth limiting portion are located between the first limiting portion and the second limiting portion.

[0016] At least one of the above technical solutions adopted in the embodiment of the present utility model can achieve the following beneficial effects:

[0017] By providing a first dust cap and a traction seat, the first dust cap is detachably mounted on the head end of the optical fiber connector, and is designed to prevent dust and other particles from entering the interior of the optical fiber connector while also achieving a waterproof seal. The traction seat is rotatably mounted on the head end of the first dust cap and is fixedly connected to the pull rope. As the entire optical fiber cable is threaded through the pipe under the tension of the pull rope, the traction seat and the first dust cap rotate relative to each other, preventing the first dust cap and the optical fiber cable from rotating. This effectively prevents damage to the optical fiber cable caused by twisting during the threading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a sectional view of the three-dimensional structure of the utility model;

[0021] Figure 3 This is an exploded view of the optical fiber connector and the first dust cap of the utility model;

[0022] Figure 4 The explosion of the pipe fitting of the utility model Figure 1 ;

[0023] Figure 5 The explosion of the pipe fitting of the utility model Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the optical fiber connector and protective shell assembly of the utility model;

[0025] Figure 7 This is a cross-sectional view of the optical fiber connector and protective shell assembly of the utility model;

[0026] Figure 8 This is an exploded view of the optical fiber connector and protective shell assembly of the utility model;

[0027] Figure 9 This is an exploded view of the protective shell assembly of the utility model;

[0028] Reference numerals

[0029] 1-fiber optic connector; 11-housing; 111-external thread; 112-external flange; 113-inner bevel groove; 12-ferrule; 13-tail handle; 14-spring; 15-crimp sleeve; 2-fiber optic cable; 3-pipe fitting; 31-first dust cap; 311-internal thread; 312-thread groove; 32-traction seat; 321-connecting part; 322-pull ring; 33-inner thread sleeve; 331-first limiting wall; 4-protective shell assembly; 41-inner shell; 411-elastic arm; 412-first limiting part; 413-second limiting part; 42-outer shell; 421-third limiting part; 422-fourth limiting part; 43-second dust cap. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0031] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1 to 9 As shown, an embodiment of the present invention provides a fiber optic connector assembly, comprising a fiber optic connector 1, a tube fitting 3, and a protective shell assembly 4. The tail end of the fiber optic connector 1 is connected to a fiber optic cable 2. As the core component of the entire connector assembly, the fiber optic connector 1 is connected to the end of the fiber optic cable 2 to facilitate the transmission of optical fiber signals.

[0033] The tube fitting 3 comprises at least a first dust cap 31 and a traction seat 32. The first dust cap 31 is detachably mounted on the head end of the optical fiber connector 1 to provide a dustproof and / or waterproof seal for the optical fiber connector 1. Specifically, the housing 11 of the optical fiber connector 1 is a tubular structure, and a coaxial external thread 111 is defined on the outer peripheral wall of the housing 11. The inner sidewall of the first dust cap 31 is at least partially defined with a coaxial internal thread 311. The open end of the first dust cap 31 is inserted into the optical fiber connector 1 and is threadedly connected to the internal thread 311 via the external thread 111, so that the first dust cap 31 is mounted on the optical fiber connector 1. The first dust cap 31 can be assembled by rotating the housing 11.

[0034] The optical fiber connector 1 is a prior art, such as Figure 2As shown, it mainly includes a shell 11, a core 12, a tail handle 13, a spring 14 and a crimping sleeve 15. The end of the optical fiber cable 2 is inserted into the shell 11 and fixed by the crimping sleeve 15. The spring 14 is located in the shell 11. Part of the tail handle 13 passes through the spring 14 and is connected to the optical fiber cable 2. The core 12 is installed on the tail handle 13 and is located on the outside of the shell 42.

[0035] The traction seat 32 is rotatably connected to the tip of the first dust cap 31. In this embodiment, the first dust cap 31 is removably mounted on the tip of the optical fiber connector 1. It is designed to prevent dust and other particles from entering the interior of the optical fiber connector 1 while also providing a waterproof seal. The structural design of the first dust cap 31 takes into account its compatibility with the optical fiber connector 1, ensuring convenient installation and a good sealing effect.

[0036] When the optical fiber connector 1 needs to pass through a pipe, the pipe fitting 3 comes into play. The first dust cap 31 is sleeved on the outside of the optical fiber connector 1, and the pipe is passed through the first dust cap 31 to maintain the dustproof and waterproof sealing effect of the optical fiber connector 1.

[0037] The staff uses the method of pulling the optical fiber cable 2 to make it move forward and pass through the pipeline. Due to the complex environment in the pipeline, the existing pulling method will inevitably cause the optical fiber cable 2 to twist or rotate. Since the optical fiber cable 2 contains glass fibers, the twisting and rotation of the optical fiber cable 2 will affect the performance and service life of the optical fiber.

[0038] Therefore, in the face of the above situation, the pipe threading accessory 3 adds a rotatable traction seat 32 on the basis of the first dust cap 31, and the traction seat 32 is fixedly connected to the pull rope, so that the entire optical fiber cable 2 is threaded through the pipe under the tension of the pull rope, and the traction seat 32 and the first dust cap 31 rotate relative to each other, thereby avoiding the rotation of the first dust cap 31 and the optical fiber cable 2, thereby effectively avoiding damage to the optical fiber cable 2 caused by twisting during the pipe threading process.

[0039] In some practical applications, such as Figures 2 to 5 As shown, the shell 11 is provided with an outer flange 112 coaxial with the optical fiber cable 2 at one end thereof. When the first dust cap 31 is installed on the optical fiber cable 2, the open end of the first dust cap 31 abuts against the outer flange 112. The outer flange 112 is mainly used to limit the first dust cap 31 to avoid over-installation of the first dust cap 31 and to prevent the interior of the first dust cap 31 from squeezing the joint of the optical fiber cable 2 so as to damage the core inside the optical fiber cable 2, thereby affecting the subsequent normal transmission of the optical fiber signal.

[0040] Specifically, the pipe fitting 3 also includes an internal threaded sleeve 311, and a threaded groove 312 is provided at one end of the first dust cap 31 away from its opening. The internal threaded sleeve 311 is threadedly connected in the threaded groove 312 and is coaxially arranged with the first dust cap 31; the connecting portion 321 on the traction seat 32 is embedded in the internal threaded sleeve 311, and is positioned between the first limiting wall 331 and the end of the first dust cap 31 through the first limiting wall 331 at the end of the internal threaded sleeve 311, and the connecting portion 321 and the first limiting wall 331 are rotationally matched, thereby realizing the rotational matching between the traction seat 32 and the first dust cap 31, and when the traction seat 32 is pulled, the optical fiber connector 1 and the optical fiber cable 2 can be dragged to move together.

[0041] In some practical applications, based on the above foundation, the thread groove 312 is set as an embedded structure, that is, the outer diameter of the thread groove 312 is smaller than the outer diameter of the first dust cap 31, and the maximum diameters of the internal thread 311 sleeve and the traction seat 32 are both less than or equal to the diameter of the first dust cap 31. Therefore, it can be ensured that the maximum diameter of the entire pipe fitting 3 is the diameter of the first dust cap 31, thereby effectively ensuring the penetrability of the entire pipe fitting 3, making it easier for it to guide the optical fiber cable 2 through smaller pipes. In practical applications, mainly for 5-6mm optical fiber cables 2, the diameter of the first dust cap 31 is less than or equal to 11.5mm, which greatly improves the penetrability of the entire cable compared to directly using the currently commonly used large-diameter dust cap.

[0042] refer to Figures 6 to 9 As shown, the protective shell assembly 4 is detachably mounted on the optical fiber connector 1. This shell 42 protects the delicate optical components and mechanical structures within the optical fiber adapter or coupler from physical damage, dust, moisture, and other external influences. For example, in harsh environments, the shell 42 can effectively block the ingress of dust and moisture, ensuring the stability and reliability of the optical fiber connection.

[0043] In some practical applications, such as Figures 6 to 9As shown, the protective shell assembly 4 is composed of an inner shell 41 and an outer shell 42. The inner shell 41 is sleeved on the optical fiber connector 1 and abuts against the outer flange 112. The shell 11 is also provided with an inner bevel groove 113 coaxial therewith. The diameter of the inner bevel groove 113 gradually decreases from the outer flange 112 to the head end of the optical fiber connector 1. The inner shell 41 is provided with at least one elastic arm 411. The outer shell 42 has an inner cavity adapted to the external shape of the inner shell 41. When the outer shell is sleeved on the inner shell 41, an inner wall of the outer shell squeezes the elastic arm 411 inward so that the elastic arm 411 is embedded in the inner bevel groove 113. The movable end of the elastic arm 411 is located at the end with a small diameter of the inner bevel groove 113 and abuts against the end wall of the inner bevel groove 113. Specifically, when the movable end of the elastic arm 411 is in an un-squeezed state, its movable end at least partially protrudes from the outer surface of the entire inner shell 41, and the protruding part of the movable end has a certain inclined surface. When the outer shell 42 is inserted into the inner shell 41, the inner wall of the outer shell 42 squeezes the movable end along the inclined surface, so that the movable end moves toward the interior of the inner shell 41, thereby embedding into the inner inclined groove 113. The entire elastic arm 411 is limited between the inner inclined groove 113 and the outer flange 112, thereby completing the fixed connection between the inner shell 41 and the optical fiber connector 1.

[0044] In this embodiment, the fixation between the inner shell 41 and the optical fiber connector 1 and the fixation between the first dust cap 31 and the optical fiber connector 1 are both limited by the outer flange 112, so as to realize the relative position between the inner shell 41 or the first dust cap 31 and the optical fiber connector 1. In terms of the overall structure, the assembly process and the process flow between the components are simplified.

[0045] Specifically, the protective shell assembly 4 further includes a second dust cap 43 (such as Figure 7 As shown), the second dust cap 43 is sleeved on the ferrule 12 in the optical fiber connector 1, and the second dust cap 43 is at least partially located inside the inner shell 41. The installation of the protective shell assembly 4 is mainly used to protect the optical fiber connector 1 when it is in use, and the pipe fitting 3 is mainly used for the optical fiber connector 1 and the optical fiber cable 2 during the pipe threading process. Therefore, a dust cap, namely the second dust cap 43, is also configured in the protective shell assembly 4 to provide dust protection for the ferrule 12 at the end of the optical fiber connector 1. It should be noted that when the optical fiber connector 1 needs to be inserted into or installed in the optical fiber transceiver or optical module at the user's location, the second dust cap 43 needs to be removed for installation.

[0046] In summary, the inner shell 41 can be clamped onto the optical fiber connector 1 by squeezing the elastic arm 411 by the outer shell 42. In order to prevent the outer shell 42 from falling off and causing the elastic arm 411 to reposition, the outer shell 42 needs to be limited. In some practical applications, at least one side wall of the inner shell 41 is provided with a first limiting portion 412 and a second limiting portion 413, and at least one side wall of the outer shell 42 is provided with an inwardly protruding third limiting portion 421 and a fourth limiting portion 422. When the outer shell 42 is inserted into the outer shell 41, the third limiting portion 421 is squeezed by the first limiting portion 412 and elastically deformed outward to pass over the first limiting portion 412, so that the third limiting portion 421 and the fourth limiting portion 422 are located between the first limiting portion 412 and the second limiting portion 413. As shown in the figure, the outer shell 42 and the inner shell 41 are generally made of hard plastic material. The third limiting portion 421 is subjected to the thrust and the first limiting portion 412 squeezes it outward, which can cause the third limiting portion 421 to expand toward the outer shape so that it passes over the first limiting portion 412. Subsequently, the second limiting portion 413 is reset and retracted. The second limiting portion 413 is provided to limit the fourth limiting portion 422, thereby limiting the sliding stroke of the outer shell 42 relative to the inner shell 41, thereby preventing the outer shell 42 from falling off the inner shell 41 and ensuring the connection stability between the inner shell 41 and the optical fiber connector 1. It should be noted that the connection between the outer shell 42 and the inner shell 41 can also be connected using a common sliding clamping structure.

[0047] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. An optical fiber connector assembly, characterized in that: include: An optical fiber connector (1), the tail end of the optical fiber connector (1) being connected to the optical fiber cable (2); A pipe-through fitting (3), the pipe-through fitting (3) comprising at least a first dust cap (31) and a traction seat (32), the first dust cap (31) being 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), and the traction seat (32) being rotatably connected to the head end of the first dust cap (31); An outer flange (112) coaxial with the optical fiber cable (2) is provided at one end of the housing (11) of the optical fiber connector (1), and when the first dust cap (31) is mounted on the optical fiber cable (2), the open end of the first dust cap (31) abuts against the outer flange (112); The optical fiber connector assembly further comprises a protective shell assembly (4), the protective shell assembly (4) comprising an inner shell (41) and an outer shell (42), the inner shell (41) being sleeved on the optical fiber connector (1) and resting against the outer flange (112), the shell (11) further comprising an inner bevel groove (113) coaxial therewith, the diameter of the inner bevel groove (113) gradually decreasing from the outer flange (112) to the head end of the optical fiber connector (1), the inner shell (41) ) is provided with at least one elastic arm (411), the outer shell (42) has an inner cavity adapted to the outer shape of the inner shell (41), and when the outer shell is sleeved on the inner shell (41), an inner wall of the outer shell squeezes the elastic arm (411) inwardly so that the elastic arm (411) is embedded in the inner inclined groove (113), and the movable end of the elastic arm (411) is located at the end of the smaller diameter of the inner inclined groove (113) and abuts against the end wall of the inner inclined groove (113).

2. The optical fiber connector assembly according to claim 1, wherein: It also includes a protective shell component (4), which is detachably mounted on the optical fiber connector (1).

3. The optical fiber connector assembly according to claim 1, wherein: The housing (11) of the optical fiber connector (1) is a tubular structure, an outer peripheral wall of the housing (11) is provided with an external thread (111) coaxial therewith, and an inner side wall of the first dust cap (31) is at least partially provided with an internal thread (311) coaxial therewith; the open end of the first dust cap (31) is inserted into the optical fiber connector (1) and is threadedly connected to the internal thread (311) via the external thread (111), so that the first dust cap (31) is mounted on the optical fiber connector (1).

4. The optical fiber connector assembly according to claim 1, wherein: The pipe fitting (3) further comprises an internally threaded (311) sleeve, and a thread groove (312) is formed at one end of the first dust cap (31) away from the opening thereof. The internally threaded (311) sleeve is threadedly connected in the thread groove (312) and is coaxially arranged with the first dust cap (31). The connecting portion (321) on the traction seat (32) is embedded in the internally threaded (311) sleeve and is positioned between the first limiting wall (331) and the end of the first dust cap (31) by a first limiting wall (331) at the end of the internally threaded (311) sleeve. The connecting portion (321) and the first limiting wall (331) are rotationally engaged.

5. The optical fiber connector assembly according to claim 4, characterized in that: The thread groove (312) is configured as an embedded structure, i.e., the outer diameter of the thread groove (312) is smaller than the outer diameter of the first dust cap (31), the maximum diameters of the internal thread (311) sleeve and the traction seat (32) are both smaller than or equal to the diameter of the first dust cap (31), and the diameter of the first dust cap (31) is smaller than or equal to 11.5 mm.

6. The optical fiber connector assembly according to claim 1, wherein: A pull ring (322) is provided on the traction seat (32).

7. The optical fiber connector assembly according to claim 1, wherein: The protective shell assembly (4) further comprises a second dust cap (43), the second dust cap (43) being sleeved on the ferrule (12) in the optical fiber connector (1), and the second dust cap (43) being at least partially located inside the inner shell (41).

8. The optical fiber connector assembly according to claim 1, wherein: At least one side wall of the inner shell (41) is provided with a first limiting portion (412) and a second limiting portion (413), and at least one side wall of the outer shell (42) is provided with a third limiting portion (421) and a fourth limiting portion (422) protruding inwardly; when the outer shell (42) is inserted into the outer shell (41), the third limiting portion (421) is squeezed by the first limiting portion (412) and elastically deformed outward to pass over the first limiting portion (412), so that the third limiting portion (421) and the fourth limiting portion (422) are located between the first limiting portion (412) and the second limiting portion (413).

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