Optical fiber connector and connector assembly

Abstract

The invention relates to the field of optical fiber communication, in particular to an optical fiber connector which comprises an insertion core assembly, an optical cable fixing rear sleeve, a top ring and a spring, the insertion core assembly comprises a tail handle and an insertion core installed at one end of the tail handle, the tail handle is sleeved with the spring and the top ring connected with the tail handle in a sliding mode, and the end, away from the insertion core, of the tail handle is fixedly provided with the optical cable fixing rear sleeve. One end of the spring abuts against the tail handle, and the other end of the spring abuts against the top ring. The invention further relates to a connector assembly which comprises the optical fiber connector, a shell and a tail sheath, the shell comprises a front sleeve and an outer shell, the outer shell is arranged outside the front sleeve in a sleeving mode, the front sleeve is installed outside the insertion core assembly and fixed to the top ring, the tail sheath is arranged outside the optical cable fixing rear sleeve and the optical cable in a sleeving mode, and the tail sheath is fixed to the optical cable fixing rear sleeve. According to the invention, the assembly is simple and convenient, the construction efficiency is high, the performance of the joint is better than the performance of field welding and the performance of using a field connector, and the actual application requirements can be better met.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication technology, and in particular to an optical fiber connector and a connector assembly. Background Art

[0002] With the large-scale construction of FTTH, the network is deeply affecting our lives. The deployment of fiber optic networks, the laying of indoor optical cables and subsequent maintenance are extremely important links. The traditional wiring method is to use manual threading, which is time-consuming. With the development of technology, air-blown micro cables have been widely used, which greatly saves construction costs, but there are still big problems with termination.

[0003] The existing air-blown scheme for entering homes mainly involves blowing the optical cable into homes and then fusing the joints or assembling on-site connectors. This method has low construction efficiency and reduced optical performance. Specifically, the termination is performed by fusing and assembling connectors on-site. The fusing method requires fusing equipment, has high technical requirements, and is inefficient. The on-site assembled connectors have high operating requirements and unstable quality. They are easily affected by the shrinkage rate of the optical cable and the environment, resulting in excessive losses or disconnection, and the signal transmission quality cannot be guaranteed. Therefore, a connector with easy construction and good joint performance is needed to achieve connection between optical fibers. This is of great significance, especially for the renovation of old residential areas, and can meet the usage needs and habits of domestic and foreign users. In view of the above-mentioned defects, the present invention has made improvements. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides an optical fiber connector and a connector assembly, which are simple and convenient to assemble, have high construction efficiency, and have better joint performance than on-site welding and using on-site connectors, which can better meet actual application needs.

[0005] The technical solution adopted by the present invention is: an optical fiber connector, including a ferrule assembly, a cable fixing rear sleeve, a top ring and a spring, the ferrule assembly includes a tail handle and a ferrule installed at one end of the tail handle, the tail handle outer sleeve is provided with the spring and the top ring, the top ring is slidably connected to the tail handle, the end of the tail handle away from the ferrule is fixed with the cable fixing rear sleeve, the ferrule assembly and the cable fixing rear sleeve are installed with an optical cable, one end of the spring abuts against the tail handle, and the other end abuts against the top ring.

[0006] Further, the tail handle includes a thick diameter section and a thin diameter section, the thick diameter section forms an annular surface on one side close to the thin diameter section, the ferrule is installed at one end of the thick diameter section, and the end of the thin diameter section away from the thick diameter section is threadedly connected to the optical cable fixing rear sleeve, the optical cable fixing rear sleeve is provided with a glue injection port, the spring and the top ring are located between the thick diameter section and the optical cable fixing rear sleeve, the middle part of the top ring is provided with a sliding hole adapted to the thin diameter section, one end of the spring abuts against the annular surface, and the other end abuts against the top ring.

[0007] Furthermore, an annular groove for snap connection is provided on the outside of the top ring.

[0008] Furthermore, a first annular cover is provided at one end of the top ring, a first mounting groove adapted to the spring is provided on the inner side of the first annular cover, and a second annular cover is provided at the other end of the top ring, a second mounting groove adapted to the optical cable fixing rear sleeve is provided on the inner side of the second annular cover.

[0009] Furthermore, an annular limiting boss is provided on the inner side of the optical cable fixing rear sleeve, a mounting cavity threadedly connected to the thin diameter section is provided on one side of the limiting boss, an inner wall of the mounting cavity away from the limiting boss is a sealing surface, and a guide groove is provided on the limiting boss.

[0010] Furthermore, it also includes a traction cap, which is sleeved outside the insert core and is detachably connected to the tail handle. The tail cover of the traction cap is outside the end of the top ring close to the spring, and the traction cap is provided with a tube pulling ring structure.

[0011] The present invention also provides a connector assembly, comprising the aforementioned optical fiber connector, and also comprising a shell and a tail sleeve, the shell comprising a detachably connected front sleeve and an outer shell, the outer shell is sleeved outside the front sleeve, the front sleeve is installed outside the ferrule assembly, and the front sleeve is fixed to the top ring, the tail sleeve is sleeved on the optical cable fixing rear sleeve and outside the optical cable, and the tail sleeve is fixed to the optical cable fixing rear sleeve.

[0012] Furthermore, the front sleeve is snap-connected to the shell, and the front sleeve is snap-connected to the top ring.

[0013] Furthermore, an annular groove adapted to the tail sleeve is provided between the front sleeve and the outer shell, a buckle is provided on the inner side of the tail sleeve, a limiting step is provided on the outer side of the optical cable fixing rear sleeve, a step groove is provided on one side of the limiting step, one end of the front sleeve is sleeved in the step groove, and a groove adapted to the buckle is formed between the front sleeve and the limiting step.

[0014] Furthermore, a first positioning plane is provided on the tail handle, and a second positioning plane adapted to the first positioning plane is provided on the inner side of the front sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The fiber optic connector is small in size, with a maximum outer diameter of 4.2mm, and can be blown through micro-tubes with smaller diameters (6mm). It is easy to construct, convenient for customers to operate, high in construction efficiency, and reduces construction costs. The connector performance is better than traditional solutions;

[0017] 2. The top ring can play a certain role in resisting tensile stress in online testing. When the optical cable is subjected to stress, the ferrule assembly retreats, and the spring is compressed to hold the top ring. The top ring bears the stress, and the ferrule assembly cannot retreat further. In the docking state, the optical cable is subjected to tension, and the ferrule retreats, but the retreat amount is controlled within the range of disconnection from the docking connector. In this way, even if the optical cable is subjected to tension, it will not affect the docking. The top ring design wraps around the spring, which can not only reduce the friction between the SC front sleeve and the spring during the assembly process, but also make the appearance more beautiful.

[0018] 3. The top ring is buckled and fixed with the SC front sleeve, which does not affect the expansion and contraction of the ferrule assembly and ensures that the connector is assembled and tightened. During optical docking, the ferrule assembly and the optical cable are fixed, the sleeve retreats, and the top ring is buckled with the SC front sleeve, and the relative position remains unchanged. At this time, the spring is compressed to provide docking elastic force.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings.

[0020] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of an optical fiber connector in an air-blowing state according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a connector assembly in a docking state according to an embodiment of the present invention;

[0024] Figure 3 for Figure 1 A schematic cross-sectional view of the structure;

[0025] Figure 4 for Figure 2 A schematic cross-sectional view of the structure;

[0026] Figure 5 This is a schematic structural diagram of an ferrule assembly according to an embodiment of the present invention;

[0027] Figure 6 It is a three-dimensional structural schematic diagram of a front cover in one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the planar structure of a front cover according to an embodiment of the present invention;

[0029] Figure 8 A schematic cross-sectional view of a top ring according to an embodiment of the present invention;

[0030] Fig. 9 A cross-sectional schematic diagram of an optical cable fixing rear sleeve according to an embodiment of the present invention;

[0031] Fig.10 for Figure 4 A partial enlarged view of point A in the middle.

[0032] Markings in the figure: 1-cable fixing rear sleeve, 2-top ring, 3-spring, 4-tail handle, 5-insert, 6-optical cable, 7-thick diameter section, 8-thin diameter section, 9-annular surface, 10-glue injection port, 11-sliding hole, 12-annular groove, 13-elastic buckle, 14-first annular cover, 15-first mounting groove, 16-second annular cover, 17-second mounting groove, 18-limiting boss, 19-sealing surface, 20-guide groove, 21-traction cap, 22-protective cap, 23-tail sleeve, 24-front sleeve, 25-housing, 26-annular slot, 27-undercut, 28-limiting step, 29-step groove, 30-groove, 31-first positioning plane, 32-second positioning plane. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the implementation of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] At present, the traditional air-blowing method is to blow the optical cable into the room through the air-blowing equipment through the pipeline, and then achieve the construction purpose by welding the joint or assembling it into a field connector. In view of the current industry development and future scene requirements, the present invention provides a fiber optic connector and connector assembly, that is, a pre-terminated connector for air-blowing scenes, to meet the current market development needs and application scenarios, with more convenient construction and better connector performance.

[0035] like Figures 1 to 10 As shown, an optical fiber connector disclosed in this embodiment includes a ferrule assembly, an optical cable fixing rear sleeve 1, a top ring 2 and a spring 3. The ferrule assembly includes a tail handle 4 and a ferrule 5 installed at one end of the tail handle 4. The spring 3 and the top ring 2 are arranged on the outer sleeve of the tail handle 4. The top ring 2 is slidably connected to the tail handle 4. The optical cable fixing rear sleeve 1 is fixedly arranged on the end of the tail handle 4 away from the ferrule 5. An optical cable 6 is installed in the ferrule assembly and the optical cable fixing rear sleeve 1. One end of the spring 3 abuts against the tail handle 4, and the other end abuts against the top ring 2. In the above technical solution, only one spring 3 is provided to be sleeved on the outer periphery of the tail handle 4. During assembly, the tail of the tail handle 4 is sleeved with the spring 3 and the top ring 2 in sequence, and the top ring 2 and the tail handle 4 can slide relative to each other. Then, the optical cable fixing rear sleeve 1 is fixedly installed at the tail end of the tail handle 4, and then the optical cable 6 is fixedly installed in the inner cavity of the ferrule assembly and the optical cable fixing rear sleeve 1 by glue fixing. The above-assembled optical fiber connector has good performance, convenient assembly, and can be easy to construct, which can well meet the actual application requirements. In specific implementation, the ferrule 5 is preferably a ceramic ferrule 5, and the tail handle 4 is preferably a metal tail handle 4.

[0036] As a preferred technical solution, the tail handle 4 includes a thick diameter section 7 and a thin diameter section 8, and the side of the thick diameter section 7 close to the thin diameter section 8 forms an annular surface 9, the core 5 is installed at one end of the thick diameter section 7, and the end of the thin diameter section 8 away from the thick diameter section 7 is threadedly connected with the optical cable fixing rear sleeve 1, the optical cable fixing rear sleeve 1 is provided with a glue injection port 10, the spring 3 and the top ring 2 are located between the thick diameter section 7 and the optical cable fixing rear sleeve 1, the middle part of the top ring 2 is provided with a sliding hole 11 adapted to the thin diameter section 8, one end of the spring 3 abuts against the annular surface 9, and the other end abuts against the top ring 2. In this embodiment, the tail handle 4 is divided into two sections according to the diameter size, namely, a thick diameter section 7 and a thin diameter section 8. The rear end of the thin diameter section 8 is installed with the optical cable fixing rear sleeve 1 through a threaded connection. The top ring 2 is sleeved on the thin diameter section 8 of the tail handle 4 through a sliding hole 11. The top ring 2 and the thin diameter section 8 are clearance-matched. The top ring 2 can slide axially along the thin diameter section 8. After being installed in place, the spring 3 is compressed and has an initial compression amount. The glue injection port 10 can be used to easily inject glue into the inner cavity of the ferrule assembly and the optical cable fixing rear sleeve 1 to fix the optical cable 6.

[0037] As a preferred technical solution, an annular groove 12 for snap connection is provided on the outside of the top ring 2. The shell (i.e., SC front sleeve 24 and SC outer shell 25) and the tail sleeve 23 are not assembled in the air blowing state, and the shell and the tail sleeve 23 are assembled in the docking state. In order to facilitate the fixing of the top ring 2 and the front sleeve 24, an annular groove 12 for snap connection with the front sleeve 24 is added to the outside of the top ring 2 in this embodiment. During assembly, the elastic snap 13 on the inner side of the front sleeve 24 is snapped into the annular groove 12, thereby realizing the fixed connection between the front sleeve 24 and the top ring 2.

[0038] As a preferred technical solution, a first annular cover 14 is provided at one end of the top ring 2, and a first mounting groove 15 adapted to the spring 3 is provided on the inner side of the first annular cover 14; a second annular cover 16 is provided at the other end of the top ring 2, and a second mounting groove 17 adapted to the optical cable fixing rear sleeve 1 is provided on the inner side of the second annular cover 16. In this embodiment, for one end of the top ring 2, the spring 3 is inserted into the first installation groove 15 after being installed in place, that is, the first annular cover 14 wraps the spring 3, and a certain gap is left between the end of the first annular cover 14 and the annular surface 9 of the thick-diameter section 7. The gap design needs to be convenient for the spring 3 to buffer and for the top ring 2 to bear the force when the buffering is completed. The top ring 2 can play a certain role in online testing tensile resistance. When the optical cable 6 is subjected to force, the ferrule assembly retreats, and the spring 3 is compressed to support the top ring 2. The top ring 2 bears the force, and the ferrule assembly cannot continue to retreat. In the docking state, the optical cable 6 is subjected to tension, and the ferrule 5 retreats, but the retreat amount is controlled within the range of disconnection from the docking connector. In this way, even if the optical cable 6 is subjected to tension, it will not affect the docking. The design of the top ring 2 to wrap the spring 3 can not only reduce the friction between the SC front sleeve 24 and the spring 3 during the assembly process, but also make the appearance more beautiful. For the other end of the top ring 2, after the optical cable fixing rear sleeve 1 and the thin diameter section 8 are threaded and installed in place, the end of the optical cable fixing rear sleeve 1 is inserted into the second installation groove 17 and supports the top ring 2 to ensure the relative position of the top ring 2 and the initial compression amount of the spring 3. The second annular cover 16 covers the end of the optical cable fixing rear sleeve 1. The use of this design can play a certain protective role and can prevent dust and impurities from directly entering the inner side of the top ring 2 and affecting the axial sliding of the top ring 2 when relative sliding occurs.

[0039] As a preferred technical solution, an annular limiting boss 18 is provided on the inner side of the optical cable fixing rear sleeve 1, and an installation cavity threadedly connected to the thin diameter section 8 is provided on one side of the limiting boss 18, and an inner wall of the installation cavity away from the limiting boss 18 is a sealing surface 19, and a guide groove 20 is provided on the limiting boss 18. In this embodiment, after the spring 3 and the top ring 2 are installed, the optical cable fixing rear sleeve 1 is installed to one end of the thin diameter section 8 through a threaded connection. After the end of the thin diameter section 8 contacts the limiting boss 18, the thread is rotated into place, and then glue is injected into the internal cavity of the assembled core assembly and the optical cable fixing rear sleeve 1, and the optical cable 6 is fixed by glue. The specific implementation steps are as follows: glue is injected through the glue injection port 10, and the glue fills the core assembly and the inner cavity of the optical cable fixing rear sleeve 1, wherein a guide groove 20 is designed on the inner side of the optical cable fixing rear sleeve 1, and the glue can flow into the threaded part along the guide groove 20 to play a bonding and fixing role. The sealing surface 19 of the optical cable fixing rear sleeve 1 and the mating surface of the core assembly are designed to be an interference fit to achieve effective sealing, which can prevent the glue from flowing to the top ring 2, causing the top ring 2 to stick to death. After the glue is injected, the optical cable 6 is inserted into the optical cable fixing rear sleeve 1 from the glue injection port 10 and heated for curing.

[0040] As a preferred technical solution, the optical fiber connector also includes a traction cap 21, which is sleeved outside the ferrule 5, and the traction cap 21 is detachably connected to the tail handle 4. The tail cover of the traction cap 21 is on the outside of the end of the top ring 2 close to the spring 3, and the traction cap 21 is provided with a tube-through pull ring structure. In this embodiment, the optical fiber connector also includes a traction cap 21, which can facilitate air blowing into the house. The tube-through pull ring structure on the traction cap 21 is a traction hole set at the front of the traction cap 21, which can well meet the tube-through traction scene. The detachable connection between the traction cap 21 and the tail handle 4 is threaded, and one end of the thick-diameter section 7 of the tail handle 4 is provided with an external thread, and the inner side of the traction cap 21 is provided with a corresponding internal thread. The tail cover of the traction cap 21 is on the outside of the end of the top ring 2 close to the spring 3. Preferably, the tail cover of the traction cap 21 is on the outside of the first annular cover 14. The use of this design can play an effective protective role and prevent dust and impurities from entering the spring 3 and the inner side of the top ring 2. In specific implementation, a protective cap 22 is also provided at one end of the ferrule 5 away from the tail handle 4, that is, the protective cap 22 is sleeved on the head of the ceramic ferrule 5 to protect the end face of the ferrule 5. The protective cap 22 is located in the traction cap 21 to play a dustproof protection role.

[0041] Based on the same inventive concept, the present embodiment also discloses a connector assembly, comprising the optical fiber connector of the aforementioned embodiment, and further comprising a shell and a tail sleeve 23, the shell comprising a detachably connected front sleeve 24 and an outer shell 25, the outer shell 25 is sleeved on the outside of the front sleeve 24, the front sleeve 24 is installed on the outside of the ferrule assembly, and the front sleeve 24 is fixed to the top ring 2, the tail sleeve 23 is sleeved on the outside of the optical cable fixing rear sleeve 1 and the optical cable 6, and the tail sleeve 23 is fixed to the optical cable fixing rear sleeve 1. In the above technical solution, after the air blowing is completed, the shell and the tail sleeve 23 are assembled, the front sleeve 24 is preferably an SC front sleeve 24, and the outer shell 25 is preferably an SC outer shell 25. The SC front sleeve 24 and the SC outer shell 25 are pre-assembled in advance and detachably connected. When assembling the shell and the tail sleeve 23, first insert the tail sleeve 23 from the front to the back, and then install the pre-assembled SC front sleeve 24 and SC outer shell 25. The front sleeve 24 is installed outside the ferrule assembly. The front sleeve 24 is fixed with the top ring 2 so that the top ring 2 can play a certain role in online testing tensile resistance. After the shell is installed in place, the tail sleeve 23 is pushed in. The tail sleeve 23 is set outside the optical cable fixed rear sleeve 1 and the optical cable 6 to protect the optical cable fixed rear sleeve 1 and the optical cable 6 well. The tail sleeve 23 is fixed with the optical cable fixed rear sleeve 1 to prevent the tail sleeve 23 from falling out. The performance of the connector assembly joint is better than that of on-site welding and using on-site connectors, and can better meet the actual application requirements.

[0042] As a preferred technical solution, the front sleeve 24 is snap-connected with the outer shell 25, and the front sleeve 24 is snap-connected with the top ring 2. Since the outer side of the top ring 2 is provided with an annular groove 12, the inner side of the SC front sleeve 24 of this embodiment is provided with an elastic snap 13, which is snapped into the annular groove 12 to realize the snap-fit ​​fixation of the top ring 2 and the SC front sleeve 24. The snap-fit ​​fixation of the top ring 2 and the SC front sleeve 24 does not affect the extension and contraction of the ferrule assembly, and at the same time ensures that the connector is assembled and tightened. During optical docking, the sleeve 1 retreats after the ferrule assembly is fixed to the optical cable, and the top ring 2 is snap-fitted with the SC front sleeve 24, and the relative position remains unchanged. At this time, the spring 3 is compressed to provide docking elastic force. In specific implementation, a snap groove is provided on the inner side of the SC outer shell 25, and correspondingly, a snap is provided on the outer side of the SC front sleeve 24, so as to realize the snap-fit ​​connection between the front sleeve 24 and the outer shell 25. It can refer to the existing technology and will not be further explained here.

[0043] As a preferred technical solution, an annular groove 26 adapted to the tail sheath 23 is provided between the front sleeve 24 and the outer shell 25, a buckle 27 is provided on the inner side of the tail sheath 23, a limiting step 28 is provided on the outer side of the optical cable fixing rear sleeve 1, a step groove 29 is provided on one side of the limiting step 28, one end of the front sleeve 24 is sleeved in the step groove 29, and a groove 30 adapted to the buckle 27 is formed between the front sleeve 24 and the limiting step 28. In this embodiment, after the SC front sleeve 24 and the SC outer shell 25 are installed in place, the tail sheath 23 is pushed in, and the tail sheath 23 is just stuck in the annular groove 26 between the front sleeve 24 and the outer shell 25, and the buckle 27 on the inner side of the tail sheath 23 is just stuck in the groove 30 between the front sleeve 24 and the limiting step 28. The above design not only facilitates the fixing of the tail sheath 23, but also enables the tail sheath 23 to play a better protective role.

[0044] As a preferred technical solution, the tail handle 4 is provided with a first positioning plane 31, and the inner side of the front sleeve 24 is provided with a second positioning plane 32 adapted to the first positioning plane 31. In this embodiment, the SC front sleeve 24 is inserted from the head of the ferrule assembly, and the thick-diameter section 7 of the tail handle 4 of the ferrule assembly is provided with a first positioning plane 31. Correspondingly, the inner side of the SC front sleeve 24 is provided with a second positioning plane 32 matched with the first positioning plane 31, so as to ensure the uniqueness of the insertion direction of the SC front sleeve 24 and prevent the ferrule assembly from rotating in the SC front sleeve 24. The customer can insert the first positioning plane 31 of the ferrule assembly in the same direction as the SC shell 25K key, and the buckle locking can be completed, which is convenient for customers to operate and convenient for construction.

[0045] In the above embodiment, the optical fiber connector installed with the traction cap 21 is suitable for the air blowing state, in which the SC front sleeve 24, the tail sleeve 23 and the SC outer shell 25 are not installed. The connector assembly installed with the front sleeve 24, the tail sleeve 23 and the outer shell 25 is suitable for the docking state.

[0046] After the air is blown into the house, the assembly is carried out in the docking state. The tail sheath 23 is inserted from the head of the traction cap 21 to the optical cable section 6, the traction cap 21 is unscrewed, and the main body (i.e., the optical fiber connector) is inserted axially into the assembled SC front sheath 24 and SC outer shell 25 in the corresponding direction. The buckle of the SC front sheath 24 is snapped into the annular groove 12 of the top ring 2 and locked, and then the tail sheath 23 is pushed in. The undercut 27 on the tail sheath 23 is snapped into the groove 30 and locked. The assembly is completed. The customer operation is simple and convenient, the construction efficiency is high, and the joint performance is better than on-site welding and the use of on-site connectors.

[0047] The optical fiber connector after the traction cap 21 is installed in this embodiment is a pre-formed air-blown connector, which is blown through the micro-tube into the house by the air-blowing equipment in the air-blowing state. The maximum diameter of the air-blown connector is 4.2mm, which can be adapted to the micro-tube with an inner diameter of 6 / 8mm, which is conducive to better meeting the actual application needs. After the air-blowing is completed, the customer installs the SC front cover 24, the SC outer cover 25 and the tail cover 23 and can use it, with high construction efficiency and good reliability.

[0048] Parts not involved in this embodiment are the same as the prior art or can be implemented by using the prior art, and will not be further described here.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical fiber connector, characterized in that: It includes a ferrule assembly, a cable fixing rear sleeve, a top ring and a spring. The ferrule assembly includes a tail handle and a ferrule installed at one end of the tail handle. The tail handle outer sleeve is provided with the spring and the top ring. The top ring is slidably connected to the tail handle. The end of the tail handle away from the ferrule is fixed with the cable fixing rear sleeve. The optical cable is installed in the ferrule assembly and the cable fixing rear sleeve. One end of the spring abuts against the tail handle, and the other end abuts against the top ring.

2. The optical fiber connector according to claim 1, characterized in that: The tail handle includes a thick diameter section and a thin diameter section, the thick diameter section forms an annular surface on one side close to the thin diameter section, the ferrule is installed at one end of the thick diameter section, the end of the thin diameter section away from the thick diameter section is threadedly connected to the optical cable fixing rear sleeve, the optical cable fixing rear sleeve is provided with a glue injection port, the spring and the top ring are located between the thick diameter section and the optical cable fixing rear sleeve, the middle part of the top ring is provided with a sliding hole adapted to the thin diameter section, one end of the spring abuts against the annular surface, and the other end abuts against the top ring.

3. The optical fiber connector according to claim 1, characterized in that: The outside of the top ring is provided with an annular groove for snap connection.

4. The optical fiber connector according to claim 1, characterized in that: A first annular cover is provided at one end of the top ring, and a first mounting groove adapted to the spring is provided on the inner side of the first annular cover; a second annular cover is provided at the other end of the top ring, and a second mounting groove adapted to the optical cable fixing rear sleeve is provided on the inner side of the second annular cover.

5. The optical fiber connector according to claim 2, characterized in that: An annular limiting boss is provided inside the optical cable fixing rear sleeve, one side of the limiting boss is provided with an installation cavity threadedly connected to the thin diameter section, the inner wall of the installation cavity away from the limiting boss is a sealing surface, and a guide groove is provided on the limiting boss.

6. An optical fiber connector according to any one of claims 1 to 5, characterized in that: It also includes a traction cap, which is sleeved outside the insert core and is detachably connected to the tail handle. The tail of the traction cap is covered on the outside of one end of the top ring close to the spring, and the traction cap is provided with a tube-penetrating pull ring structure.

7. A connector assembly, characterized in that: The optical fiber connector comprises the optical fiber connector as described in any one of claims 1 to 5, and further comprises a shell and a tail sleeve, wherein the shell comprises a detachably connected front sleeve and an outer shell, the outer shell is sleeved outside the front sleeve, the front sleeve is installed outside the ferrule assembly, and the front sleeve is fixed to the top ring, the tail sleeve is sleeved on the optical cable fixing rear sleeve and outside the optical cable, and the tail sleeve is fixed to the optical cable fixing rear sleeve.

8. A connector assembly according to claim 7, characterized in that: The front sleeve is snap-connected to the shell, and the front sleeve is snap-connected to the top ring.

9. A connector assembly according to claim 7, characterized in that: An annular groove matched with the tail sleeve is provided between the front sleeve and the outer shell, a buckle is provided on the inner side of the tail sleeve, a limiting step is provided on the outer side of the optical cable fixing rear sleeve, a step groove is provided on one side of the limiting step, one end of the front sleeve is sleeved in the step groove, and a groove matched with the buckle is formed between the front sleeve and the limiting step.

10. A connector assembly according to claim 7, characterized in that: The tail handle is provided with a first positioning plane, and the inner side of the front sleeve is provided with a second positioning plane adapted to the first positioning plane.

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