An SC type fiber optic connector

Abstract

This utility model discloses an SC-type fiber optic connector, relating to the field of fiber optic communication technology. The SC-type fiber optic connector is connected to the end of an optical fiber body and includes a bundle ring, a ferrule assembly, a traction assembly, and a tail sleeve. The bundle ring has a first through hole. The ferrule assembly and the optical fiber body are respectively inserted into the first through hole from both ends of the bundle ring, and the ferrule assembly is connected to the optical fiber body within the first through hole. The traction assembly includes a fixed sleeve and a rotating component. The fixed sleeve is detachably fitted onto the end of the bundle ring away from the optical fiber body. The ferrule assembly is accommodated within the cavities of the bundle ring and the fixed sleeve. The end of the fixed sleeve away from the bundle ring has a shaft hole communicating with the inner cavity of the fixed sleeve. The rotating component has a traction part, a rotating shaft part, and a limiting part connected in sequence. The rotating shaft part rotatably passes through the shaft hole, the limiting part is confined within the inner cavity of the fixed sleeve, and the traction part is located on the side of the shaft hole opposite to the limiting part. The tail sleeve is fitted onto the end of the bundle ring away from the ferrule assembly and the outer side of the optical fiber body.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication technology, and in particular to an SC type optical fiber connector. Background Technology

[0002] With the large-scale application of FTTH (Fiber to the Home), broadband speeds have increased significantly. However, during construction, fiber optic cables often need to pass through walls or conduits when entering from outdoors. The holes or conduits used for this are typically only slightly larger than the cable diameter. Traditional pre-terminated fiber optic cables use SC fiber optic connectors, which are much larger than the actual cable size. Furthermore, the cable itself is quite flexible, often resulting in fiber breakage or impassable sections when used in conduits or through walls, significantly impacting installation.

[0003] Therefore, there is an urgent need for a fiber optic connector that is easy to pass through walls and conduits to meet the construction requirements of fiber-to-the-home and solve the problems of traditional fiber optic connectors being easily damaged or bent when passing through walls and conduits. Utility Model Content

[0004] The main purpose of this invention is to propose an SC type fiber optic connector, which aims to solve the problem of traditional fiber optic connectors being easily damaged and bent when passing through walls and conduits.

[0005] To achieve the above objectives, the present invention proposes an SC-type fiber optic connector, which is connected to the end of the fiber optic body. The SC-type fiber optic connector includes a bundle ring, a ferrule assembly, a traction assembly, and a tail sleeve. The bundle ring has a first through hole. The ferrule assembly and the fiber optic body are respectively inserted into the first through hole from both ends of the bundle ring, and the ferrule assembly is connected to the fiber optic body within the first through hole. The traction assembly includes a fixed sleeve and a rotating component. The fixed sleeve is detachably fitted onto the end of the bundle ring away from the fiber optic body. The ferrule assembly is accommodated within the cavities of the bundle ring and the fixed sleeve. The end of the fixed sleeve away from the bundle ring has a shaft hole communicating with the cavity of the fixed sleeve. The rotating component has a traction part, a rotating shaft part, and a limiting part connected in sequence. The rotating shaft part is rotatably inserted through the shaft hole. The limiting part is confined within the cavity of the fixed sleeve. The traction part is located on the side of the shaft hole opposite to the limiting part. The tail sleeve is fitted onto the end of the bundle ring away from the ferrule assembly and the outside of the fiber optic body.

[0006] In one embodiment, the ferrule assembly includes a ferrule body, a tail shank, and a spring: an annular boss is formed on the outer periphery of the tail shank; the tail shank is inserted into the end of the bundle ring away from the optical fiber body, and the annular boss is located on the side of the bundle ring facing away from the optical fiber body; the spring is sleeved on the tail shank, and the two ends of the spring abut against the annular boss and the bundle ring, respectively; the ferrule body is connected to the end of the tail shank away from the bundle ring.

[0007] In one embodiment, the SC type fiber optic connector further includes an inner frame and an outer frame. The inner frame is detachably fitted over the ferrule assembly and the bundle ring, and the outer frame is detachably fitted over the inner frame. The inner frame and the outer frame are used for insertion with a fiber optic adapter.

[0008] In one embodiment, the inner wall of the inner frame sleeve is provided with a snap-fit ​​hole, and the outer wall of the retaining ring is provided with a snap-fit ​​protrusion, the snap-fit ​​protrusion snapping into the inner wall of the snap-fit ​​hole; and / or, the outer wall of the inner frame sleeve is provided with a thrust-stop protrusion and a back-stop protrusion, the thrust-stop protrusion and the back-stop protrusion being spaced apart, and the thrust-stop protrusion and the back-stop protrusion being sequentially distributed along the direction from the traction assembly to the retaining ring; the inner wall of the outer frame sleeve is provided with a limiting hole, the limiting hole having a thrust wall and a back-stop wall disposed opposite to each other, the thrust wall and the back-stop wall being sequentially distributed along the direction from the traction assembly to the retaining ring; the thrust-stop protrusion and the back-stop protrusion are both confined within the limiting hole, and the distance from the thrust-stop protrusion to the back-stop protrusion is less than the distance from the thrust wall to the back-stop wall.

[0009] In one embodiment, the annular boss is provided with a foolproof notch, and the inner wall of the inner frame is provided with a foolproof protrusion, which engages with the inner wall of the foolproof notch.

[0010] In one embodiment, the outer wall of the inner frame is provided with a foolproof marking portion, which is correspondingly arranged with the foolproof protrusion.

[0011] In one embodiment, the fixing sleeve has an internal thread, and the retaining ring has an external thread, with the internal thread and the external thread being screwed together.

[0012] In one embodiment, the inner wall of the tail sleeve is provided with a snap-fit ​​ring groove, and the end of the retaining ring away from the insert assembly is provided with a snap-fit ​​ring protrusion, which snaps into the inner wall of the snap-fit ​​ring groove. Alternatively, the inner wall of the tail sleeve may be press-fitted with the outer wall of the ferrule.

[0013] In one embodiment, the traction part is provided with a traction hole, or the traction part is provided with a hook.

[0014] In one embodiment, the outer wall of the clamping ring is provided with at least two clamping planes, and each pair of clamping planes is arranged parallel to each other.

[0015] The SC-type fiber optic connector proposed in this utility model is connected to the end of the fiber optic body and includes a bundle ring, a ferrule assembly, a traction assembly, and a tail sleeve. The bundle ring has a first through hole. The ferrule assembly and the fiber optic body are respectively inserted into the first through hole from both ends of the bundle ring, and the ferrule assembly is connected to the fiber optic body within the first through hole. The traction assembly includes a fixed sleeve and a rotating component. The fixed sleeve is detachably fitted onto the end of the bundle ring away from the fiber optic body. The ferrule assembly is accommodated within the cavities of the bundle ring and the fixed sleeve. The end of the fixed sleeve away from the bundle ring has a shaft hole communicating with the inner cavity of the fixed sleeve. The rotating component has a traction part, a rotating shaft part, and a limiting part connected in sequence. The rotating shaft part is rotatably inserted through the shaft hole, the limiting part is limited within the inner cavity of the fixed sleeve, and the traction part is located on the side of the shaft hole opposite to the limiting part. The tail sleeve is fitted onto the end of the bundle ring away from the ferrule assembly and outside the fiber optic body. This utility model, by setting up a traction assembly, allows the fiber optic connector to be pulled through walls or pipes without pushing, thus avoiding fiber bending. By fitting the fixed sleeve in the traction assembly onto the bundle ring and accommodating the ferrule assembly, damage or contamination of the ferrule assembly can be prevented during traction. A rotating component is set on the fixed sleeve, and a traction part is set on the rotating component. The torsional force generated during traction causes the rotating component to rotate relative to the fixed sleeve while the fixed sleeve does not rotate. Therefore, the optical fiber body will not suffer torsional damage, solving the problem of easy damage and bending of traditional optical fiber connectors when passing through walls and pipes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a structural embodiment of the SC type fiber optic connector provided by this utility model; Figure 2 for Figure 1 Cross-sectional view of the SC type fiber optic connector; Figure 3 for Figure 1 Exploded view of the SC type fiber optic connector; Figure 4 A schematic diagram of another embodiment of the SC type fiber optic connector provided by this utility model; Figure 5 for Figure 4 Exploded view of the SC type fiber optic connector; Figure 6 for Figure 5 Schematic diagram of the middle beam ring; Figure 7 for Figure 5 A structural schematic diagram of the inner frame from a single perspective; Figure 8 for Figure 7 A structural schematic diagram of the inner frame from another perspective; Figure 9 for Figure 5 A schematic diagram of the structure of the inner and outer frame.

[0018] Explanation of icon numbers: 100. SC type fiber optic connector; 1. Binding ring; 1a. First through hole; 11. External thread; 12. Snap-fit ​​ring protrusion; 13. Snap-fit ​​protrusion; 14. Clamping plane; 2. Plug assembly; 21. Plug body; 22. Tailstock; 221. Annular boss; 221a. Foolproof notch; 23. Spring; 3. Traction assembly; 31. Fixing sleeve; 311. Internal thread; 31a. Shaft hole; 32. Rotating component; 321. Traction part; 321a. Traction hole; 322. Rotating shaft part; 323. Limiting part; 4. Tail sleeve; 4a. Snap-fit ​​ring groove; 5. Inner frame sleeve; 5a. Snap-fit ​​hole; 51. Thrust protrusion; 52. Anti-reverse protrusion; 53. Foolproof protrusion; 54. Foolproof marking section; 6. Outer frame sleeve; 6a. Limiting hole; 6a1. Thrust wall; 6a2. Anti-reverse wall; 200. Fiber optic body.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] This utility model proposes an SC type fiber optic connector 100.

[0024] Please see Figures 1 to 3 In one embodiment of this utility model, the SC type fiber optic connector 100 is connected to the end of the fiber optic body 200. The SC type fiber optic connector 100 includes a bundle ring 1, a ferrule assembly 2, a traction assembly 3, and a tail sleeve 4. The bundle ring 1 has a first through hole 1a. The ferrule assembly 2 and the fiber optic body 200 are respectively inserted into the first through hole 1a from both ends of the bundle ring 1, and the ferrule assembly 2 is connected to the fiber optic body 200 in the first through hole 1a. The traction assembly 3 includes a fixing sleeve 31 and a rotating member 32. The fixing sleeve 31 is detachably sleeved on the bundle ring 1 away from the fiber optic body 200. At one end, the ferrule assembly 2 is housed within the inner cavity of the bundle ring 1 and the fixing sleeve 31. The end of the fixing sleeve 31 away from the bundle ring 1 is provided with a shaft hole 31a communicating with the inner cavity of the fixing sleeve 31. The rotating member 32 has a traction part 321, a rotating shaft part 322, and a limiting part 323 connected in sequence. The rotating shaft part 322 is rotatably inserted through the shaft hole 31a. The limiting part 323 is limited within the inner cavity of the fixing sleeve 31. The traction part 321 is located on the side of the shaft hole 31a opposite to the limiting part 323. The tail sleeve 4 is sleeved on the end of the bundle ring 1 away from the ferrule assembly 2 and outside the optical fiber body 200.

[0025] In this embodiment, the bundle ring 1 is an important component of the connector, used to constrain the optical fiber body 200 and connect the remaining components. The bundle ring 1 has a first through-hole 1a, which is circular, allowing the ferrule assembly 2 and the optical fiber body 200 to be smoothly inserted into it from both ends of the bundle ring 1, respectively, achieving a stable connection between the ferrule assembly 2 and the optical fiber body 200 within the first through-hole 1a. The ferrule assembly 2 is a key component for achieving precise optical fiber splicing, and its structure includes a precision ferrule and other auxiliary structures that cooperate with it. The ferrule is made of high-precision ceramic material, ensuring low loss and high stability of the optical fiber during splicing. The size and shape of the ferrule assembly 2 are adapted to the first through-hole 1a of the bundle ring 1, ensuring that it can be tightly inserted into the first through-hole 1a and achieve a reliable connection with the optical fiber body 200. The traction assembly 3 includes a fixed sleeve 31 and a rotating member 32. The fixed sleeve 31 is detachably fitted onto the end of the bundle ring 1 away from the fiber body 200, facilitating the removal of the traction assembly 3 after the SC-type fiber connector 100 has passed through a wall or pipe. The internal dimensions and shape of the fixed sleeve 31 are adapted to the bundle ring 1 and the ferrule assembly 2, accommodating the ferrule assembly 2 and thus providing good protection for the ferrule assembly 2 during traction, preventing damage or contamination. The end of the fixed sleeve 31 away from the bundle ring 1 has a shaft hole 31a communicating with the internal cavity of the fixed sleeve 31, which provides an installation position for the rotating shaft portion 322 of the rotating member 32. The rotating member 32 has a traction portion 321, a rotating shaft portion 322, and a limiting portion 323 connected in sequence. The rotating shaft portion 322 is rotatably inserted through the shaft hole 31a, allowing the rotating member 32 to rotate flexibly relative to the fixed sleeve 31 during traction. The limiting part 323 engages with the periphery of the shaft hole 31a facing the inner cavity of the fixed sleeve 31, thereby being confined within the inner cavity of the fixed sleeve 31. This serves to connect the rotating part 32 to the fixed sleeve 31, preventing axial movement during traction. The limiting part 323 can be an annular boss 221 surrounding the rotating shaft part 322 or protrusions symmetrically arranged on the side wall of the rotating shaft part 322. The traction part 321 is located on the side of the shaft hole 31a opposite to the limiting part 323, and has a structure for pulling or hanging ropes, facilitating connection with external traction ropes or other tools to achieve the pulling operation of the fiber optic connector. It should be noted that the rotating part 32 and the fixed sleeve 31 can be made of engineering plastics or other materials. These materials have a certain degree of deformation. Therefore, when the pulling force is greater than the clamping force between the limiting part 323 and the periphery of the shaft hole 31a, the inner wall of the shaft hole 31a and the rotating part 32 can deform to pull the rotating part 32 out of the fixed sleeve 31. Similarly, the rotating part 32 can be inserted into the fixed sleeve 31. In this way, when the traction force is too large, the rotating part 32 can fall out of the fixed sleeve 31 to prevent the optical fiber from breaking. The traction function can be restored and traction can be performed again by inserting the rotating part 32 into the fixed sleeve 31 again.

[0026] The tail sleeve 4 is fitted onto the end of the bundle ring 1 furthest from the ferrule assembly 2 and the outer side of the optical fiber body 200. Its main function is to provide additional protection for the optical fiber body 200, preventing excessive bending and damage to the optical fiber during use. The tail sleeve 4 can be made of a soft and elastic plastic, ensuring its protective function for the optical fiber body 200 without adversely affecting the flexibility of the optical fiber. The shape and size of the tail sleeve 4 are adapted to the bundle ring 1 and the optical fiber body 200, ensuring that it can be tightly fitted in the corresponding position to achieve a good protective effect.

[0027] In summary, this embodiment changes the traditional method of pushing optical fiber connectors through walls and pipes by using the traction component 3. This avoids the problem of optical fibers being easily bent due to pushing during the process of passing through walls and pipes. At the same time, it effectively protects the ferrule component 2 and the optical fiber body 200, thereby realizing the efficient and safe application of optical fiber connectors in fiber-to-the-home construction. It solves the problem of easy damage and bending of traditional optical fiber connectors when passing through walls and pipes, and achieves the technical effect of improving the reliability and construction efficiency of optical fiber connectors.

[0028] Further, please refer to Figures 1 to 3 In one embodiment of the present invention, the ferrule assembly 2 includes a ferrule body 21, a tail shank 22, and a spring 23: an annular boss 221 is formed on the outer periphery of the tail shank 22, the tail shank 22 is inserted into the end of the bundle ring 1 away from the optical fiber body 200, and the annular boss 221 is located on the side of the bundle ring 1 facing away from the optical fiber body 200, the spring 23 is sleeved on the tail shank 22, and the two ends of the spring 23 abut against the annular boss 221 and the bundle ring 1 respectively; the ferrule body 21 is connected to the end of the tail shank 22 away from the bundle ring 1.

[0029] In this embodiment, the ferrule body 21 is a key component for inserting optical fibers and achieving fiber optic splicing. It is typically made of high-precision ceramic material, possessing excellent optical and mechanical properties to ensure low loss and high stability during splicing. The tail shank 22 is the supporting part of the ferrule body 21, with an annular protrusion 221 formed on its outer periphery. The annular protrusion 221 serves a positioning and limiting function. The tail shank 22 is inserted into the end of the bundle ring 1 furthest from the fiber body 200, and the annular protrusion 221 is located on the side of the bundle ring 1 facing away from the fiber body 200, allowing the tail shank 22 to be stably positioned within the bundle ring 1. A spring 23 is sleeved on the tail shank 22, with its two ends abutting against the annular protrusion 221 and the bundle ring 1, respectively. The spring 23 provides a certain elastic buffering effect to the ferrule assembly 2, absorbing a certain amount of impact and vibration during the insertion of the fiber optic connector into the adapter, ensuring the stability and reliability of the fiber optic connection. Simultaneously, the elastic force of the spring 23 also ensures a tight contact between the internal slot of the adapter and the ferrule body 21, further improving the quality of the fiber optic connection. The insert body 21 is connected to the end of the tail shank 22 that is away from the binding ring 1.

[0030] Further, please refer to Figure 4 and Figure 5 In one embodiment of the present invention, the SC type fiber optic connector 100 further includes an inner frame sleeve 5 and an outer frame sleeve 6. The inner frame sleeve 5 is detachably sleeved on the outside of the ferrule assembly 2 and the bundle ring 1, and the outer frame sleeve 6 is detachably sleeved on the outside of the inner frame sleeve 5. The inner frame sleeve 5 and the outer frame sleeve 6 are used for plugging into the fiber optic adapter.

[0031] In this embodiment, the inner frame sleeve 5 and the outer frame sleeve 6 are used to enable the insertion of the fiber optic connector and the fiber optic adapter. The inner frame sleeve 5 is detachably fitted outside the ferrule assembly 2 and the bundle ring 1. The inner cavity size and shape of the inner frame sleeve 5 are adapted to the ferrule assembly 2 and the bundle ring 1, allowing it to fit tightly outside them and providing additional protection and support for the ferrule assembly 2 and the bundle ring 1. The outer frame sleeve 6 is detachably fitted outside the inner frame sleeve 5. The inner cavity size and shape of the outer frame sleeve 6 are adapted to the inner frame sleeve 5, allowing it to fit tightly outside the inner frame sleeve 5, forming a complete protective shell. The end shapes of the inner frame sleeve 5 and the outer frame sleeve 6 match the insertion holes of the fiber optic adapter. The detachable design of the inner frame sleeve 5 and the outer frame sleeve 6 allows the traction assembly 3 to be removed and the inner frame sleeve 5 and the outer frame sleeve 6 to be installed after the ferrule assembly 2, the bundle ring 1, and the tail sleeve 4 have passed through a wall or pipe. Subsequently, they can be inserted into the fiber optic adapter to achieve fiber optic coupling.

[0032] Further, please refer to Figures 5 to 7 In one embodiment of this utility model, the inner wall of the inner frame sleeve 5 is provided with a snap-fit ​​hole 5a, and the outer wall of the retaining ring 1 is provided with a snap-fit ​​protrusion 13, which snaps into the inner wall of the snap-fit ​​hole 5a; and / or, the outer wall of the inner frame sleeve 5 is provided with a thrust-stopping protrusion 51 and a backlash-stopping protrusion 52, which are spaced apart and are distributed sequentially along the direction from the traction assembly 3 to the retaining ring 1. Please refer to [reference needed]. Figure 5 , Figure 6 and Figure 9 The inner wall of the outer frame sleeve 6 is provided with a limiting hole 6a. The limiting hole 6a has a thrust wall 6a1 and a backstop wall 6a2 arranged opposite to each other. The thrust wall 6a1 and the backstop wall 6a2 are distributed sequentially along the direction from the traction assembly 3 to the bundle ring 1. The thrust protrusion 51 and the backstop protrusion 52 are both limited within the limiting hole 6a, and the distance between the thrust protrusion 51 and the backstop protrusion 52 is less than the distance between the thrust wall 6a1 and the backstop wall 6a2.

[0033] In this embodiment, the inner wall of the inner frame sleeve 5 is provided with a snap-fit ​​hole 5a, and the outer wall of the retaining ring 1 is provided with a snap-fit ​​protrusion 13. This snap-fit ​​structure design enables the inner frame sleeve 5 to achieve a reliable connection with the retaining ring 1. The snap-fit ​​protrusion 13 snaps into the inner wall of the snap-fit ​​hole 5a, forming a mechanically locked connection, ensuring that the inner frame sleeve 5 will not loosen or fall off during use. Furthermore, multiple snap-fit ​​holes 5a and snap-fit ​​protrusions 13 can be provided axially symmetrically distributed about the first through hole 1a, with each snap-fit ​​hole 5a snapping into one snap-fit ​​protrusion 13, thereby further improving the snap-fit ​​strength between the inner frame sleeve 5 and the retaining ring 1. The retaining ring 1 or the inner frame sleeve 5 can be made of engineering plastic with a certain deformation capacity. Under a certain external force, the retaining ring 1 or the inner frame sleeve 5 can be separated by deformation. For example, pulling the retaining ring 1 or the inner frame sleeve 5 in the opposite direction with a pulling force greater than the snap-fit ​​force threshold of the snap-fit ​​hole 5a and the snap-fit ​​protrusion 13 can separate the retaining ring 1 from the inner frame sleeve 5.

[0034] The outer wall of the inner frame sleeve 5 is provided with a thrust protrusion 51 and a backstop protrusion 52, which are spaced apart and distributed sequentially along the direction from the traction assembly 3 to the retaining ring 1. This design enables the inner frame sleeve 5 to achieve bidirectional limiting function when it mates with the outer frame sleeve 6. The shape and size of the thrust protrusion 51 and the backstop protrusion 52 are adapted to the limiting hole 6a of the outer frame sleeve 6, so that the thrust protrusion 51 and the backstop protrusion 52 can fit tightly. The limiting hole 6a has a thrust wall 6a1 and a backstop wall 6a2 arranged opposite to each other, which are distributed sequentially along the direction from the traction assembly 3 to the retaining ring 1. Both the thrust protrusion 51 and the backstop protrusion 52 are confined within the limiting hole 6a, and the distance between the thrust protrusion 51 and the backstop protrusion 52 is less than the distance between the thrust wall 6a1 and the backstop wall 6a2. This structural design allows the thrust protrusion 51 and the anti-reverse protrusion 52 to have a certain degree of mobility within the limiting hole 6a. When the anti-reverse protrusion 52 abuts against the anti-reverse wall 6a2, the ferrule is completely covered and protected within the outer frame sleeve 6. When the thrust protrusion 51 abuts against the thrust wall 6a1, the ferrule is exposed outside the outer frame sleeve 6. At this time, the ferrule can be used for optical fiber coupling.

[0035] Further, please refer to Figure 5 and Figure 8 In one embodiment of this utility model, the annular boss 221 is provided with a foolproof notch 221a, and the inner wall of the inner frame sleeve 5 is provided with a foolproof protrusion 53, which is engaged with the inner wall of the foolproof notch 221a.

[0036] In this embodiment, the annular boss 221 is provided with a foolproof notch 221a, and the inner wall of the inner frame 5 is provided with a foolproof protrusion 53. This foolproof structure is designed to prevent the inner frame 5 from being assembled in the wrong direction during installation. The size and shape of the foolproof notch 221a and the foolproof protrusion 53 are matched to ensure that they can fit tightly. It should be noted that, in order to achieve the foolproof function, an odd number of foolproof protrusions 53 and foolproof notches 221a can be provided in an asymmetrical distribution. For ease of assembly, this embodiment, by example, only provides one foolproof notch 221a and one foolproof protrusion 53. The cooperation between the foolproof protrusion 53 and the foolproof notch 221a ensures that the inner frame 5 can only be assembled onto the annular boss 221 in the correct direction during installation, effectively preventing the problem of performance degradation or damage to the fiber optic connector caused by assembly errors. This foolproof structure design not only improves the assembly efficiency of the fiber optic connector, but also further improves the reliability and service life of the fiber optic connector, ensuring the high quality of the fiber optic connection. This design allows for wider and more reliable application of fiber optic connectors in fiber-to-the-home (FTTH) construction. It solves the problem of assembly errors that are prone to occur during the installation of traditional fiber optic connectors, achieving the technical effect of improving the reliability and service life of fiber optic connectors and meeting the requirements for high performance and high reliability of fiber optic connectors in FTTH construction.

[0037] Further, please refer to Figure 7 and Figure 8 In one embodiment of this utility model, the outer wall of the inner frame sleeve 5 is provided with a foolproof marking part 54, and the foolproof marking part 54 is correspondingly arranged with the foolproof protrusion 53.

[0038] In this embodiment, the outer wall of the inner frame 5 is provided with a foolproof marking portion 54, which corresponds to the foolproof protrusion 53 on the inner wall of the inner frame 5. The foolproof marking portion 54 is designed to visually clearly indicate the position of the foolproof protrusion 53, thereby providing intuitive guidance during assembly. The foolproof marking portion 54 can be distinguished by different colors, shapes, or markings. For example, it can use markings of colors such as red or blue, or specific symbols or text can be engraved on the outer wall of the inner frame 5. This design allows the assembler to quickly identify the position of the foolproof protrusion 53, thereby ensuring that the inner frame 5 is correctly aligned with the foolproof notch 221a on the annular boss 221 during installation.

[0039] Further, please refer to Figure 2 In one embodiment of this utility model, the fixing sleeve 31 is provided with an internal thread 311, and the retaining ring 1 is provided with an external thread 11. The internal thread 311 and the external thread 11 are screwed together.

[0040] In this embodiment, the inner wall of the fixing sleeve 31 is provided with an internal thread 311, and the outer wall of the bundle ring 1 is provided with an external thread 11. This threaded structure design allows the fixing sleeve 31 to be detachably connected to the bundle ring 1. The size and shape of the internal thread 311 and the external thread 11 are matched to ensure a tight fit and form a stable connection. After the SC type fiber optic connector 100 passes through a wall or pipe, the fixing sleeve 31 can be unscrewed and the inner frame sleeve 5 and the outer frame sleeve 6 can be installed.

[0041] Further, please refer to Figure 2 and Figure 3 In one embodiment of the present invention, the inner arm of the tail sleeve 4 is provided with a snap ring groove 4a, and the end of the binding ring 1 away from the insert assembly 2 is provided with a snap ring protrusion 12, which snaps into the inner wall of the snap ring groove 4a; or, the inner wall of the tail sleeve 4 is press-fitted with the outer wall of the binding ring 1.

[0042] In this embodiment, to achieve a detachable connection between the retaining ring 1 and the tail sleeve 4, two connection schemes are proposed. The first scheme involves providing a snap-fit ​​groove 4a on the inner wall of the tail sleeve 4 and a snap-fit ​​protrusion 12 on the end of the retaining ring 1 furthest from the insert assembly 2. This snap-fit ​​structure design allows the tail sleeve 4 to reliably connect with the retaining ring 1. The second scheme involves an interference fit between the inner wall of the tail sleeve 4 and the outer wall of the retaining ring 1. An interference fit is a method of achieving a tight connection by creating a certain amount of interference between two components. Both schemes ensure that the tail sleeve 4 and the retaining ring 1 maintain stable connection performance under different usage environments and conditions.

[0043] Further, please refer to Figures 1 to 3 In one embodiment of the present invention, the traction part 321 is provided with a traction hole 321a, or the traction part 321 is provided with a hook.

[0044] In this embodiment, the traction part 321 is used to connect with the traction tool to provide a stable traction force. This embodiment provides two configuration schemes for the traction part 321. First, the traction part 321 is provided with a traction hole 321a. The size and shape of the traction hole 321a can be selected according to the traction tool to ensure that it can connect with an external traction tool. For example, a circular hole, a square hole, or a long strip hole can be used to thread a traction rope. Second, the traction part 321 is provided with a hook. The hook can be L-shaped or J-shaped, allowing construction personnel to easily hang the traction tool on the hook, thereby realizing the traction operation of the fiber optic connector.

[0045] Further, please refer to Figure 6 In one embodiment of the present invention, the outer wall of the clamping ring 1 is provided with at least two clamping planes 14, and each pair of clamping planes 14 are arranged parallel to each other.

[0046] In this embodiment, the outer wall of the clamping ring 1 is provided with at least two clamping surfaces 14, and each pair of clamping surfaces 14 is arranged parallel to each other. The main purpose of this design is to provide a stable clamping surface when assembling and disassembling the fixing sleeve 31, preventing the clamping ring 1 from rotating. The clamping surfaces 14 can be tightly fitted with external clamping tools, such as wrenches or clamps. The number of clamping surfaces 14 can be an even number, such as two, four, six or more. It should be noted that the number of clamping surfaces 14 should not be too large, as too many clamping surfaces 14 can easily lead to a reduction in the force-bearing area of ​​the clamping surfaces 14, causing slippage.

[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An SC-type fiber optic connector, connected to the end of an optical fiber body, characterized in that, The SC type fiber optic connector includes: A beaded ring (1) having a first through hole (1a); A ferrule assembly (2) and an optical fiber body are respectively inserted into the first through hole (1a) from both ends of the bundle ring (1), and the ferrule assembly (2) and the optical fiber body are connected in the first through hole (1a); A traction assembly (3) includes a fixed sleeve (31) and a rotating member (32). The fixed sleeve (31) is detachably fitted onto the end of the bundle ring (1) away from the optical fiber body. The ferrule assembly (2) is accommodated in the inner cavity of the bundle ring (1) and the fixed sleeve (31). The end of the fixed sleeve (31) away from the bundle ring (1) is provided with a shaft hole (31a) communicating with the inner cavity of the fixed sleeve (31). The rotating member (32) has a traction part (321), a rotating shaft part (322), and a limiting part (323) connected in sequence. The rotating shaft part (322) is rotatably inserted through the shaft hole (31a). The limiting part (323) is limited in the inner cavity of the fixed sleeve (31). The traction part (321) is located on the side of the shaft hole (31a) opposite to the limiting part (323). Tail sleeve (4), which is sleeved on the end of the bundle ring (1) away from the ferrule assembly (2) and the outer side of the optical fiber body.

2. The SC type fiber optic connector as described in claim 1, characterized in that, The ferrule assembly (2) includes a ferrule body (21), a tail stick (22), and a spring (23): An annular protrusion (221) is formed on the outer periphery of the tail shank (22). The tail shank (22) is inserted into the end of the bundle ring (1) away from the optical fiber body, and the annular protrusion (221) is located on the side of the bundle ring (1) facing away from the optical fiber body. The spring (23) is sleeved on the tail shank (22), and the two ends of the spring (23) abut against the annular protrusion (221) and the bundle ring (1) respectively. The insert body (21) is connected to the end of the tail shank (22) away from the binding ring (1).

3. The SC type fiber optic connector as described in claim 2, characterized in that, The SC type fiber optic connector further includes an inner frame sleeve (5) and an outer frame sleeve (6). The inner frame sleeve (5) is detachably fitted outside the ferrule assembly (2) and the bundle ring (1). The outer frame sleeve (6) is detachably fitted outside the inner frame sleeve (5). The inner frame sleeve (5) and the outer frame sleeve (6) are used for plugging into the fiber optic adapter.

4. The SC type fiber optic connector as described in claim 3, characterized in that, The inner wall of the inner frame sleeve (5) is provided with a snap-fit ​​hole (5a), and the outer wall of the binding ring (1) is provided with a snap-fit ​​protrusion (13). The snap-fit ​​protrusion (13) snaps into the inner wall of the snap-fit ​​hole (5a). And / or, the outer wall of the inner frame sleeve (5) is provided with a thrust-stopping protrusion (51) and a back-stopping protrusion (52), the thrust-stopping protrusion (51) and the back-stopping protrusion (52) are spaced apart, and the thrust-stopping protrusion (51) and the back-stopping protrusion (52) are distributed sequentially along the direction from the traction assembly (3) to the clamping ring (1), and the inner wall of the outer frame sleeve (6) is provided with a limiting hole (6a), the limiting hole (6a) having a thrust wall disposed opposite to it. (6a1) and (6a2) are provided. The thrust wall (6a1) and the anti-reverse wall (6a2) are distributed sequentially along the direction from the traction assembly (3) to the bundle ring (1). The thrust protrusion (51) and the anti-reverse protrusion (52) are both located within the limiting hole (6a). The distance between the thrust protrusion (51) and the anti-reverse protrusion (52) is less than the distance between the thrust wall (6a1) and the anti-reverse wall (6a2).

5. The SC type fiber optic connector as described in claim 3, characterized in that, The annular boss (221) is provided with a foolproof notch (221a), and the inner wall of the inner frame sleeve (5) is provided with a foolproof protrusion (53), which is engaged with the inner wall of the foolproof notch (221a).

6. The SC type fiber optic connector as described in claim 5, characterized in that, The outer wall of the inner frame (5) is provided with a foolproof marking part (54), and the foolproof marking part (54) is correspondingly provided with the foolproof protrusion (53).

7. The SC type fiber optic connector as described in any one of claims 1 to 6, characterized in that, The fixing sleeve (31) is provided with an internal thread (311), and the retaining ring (1) is provided with an external thread (11). The internal thread (311) and the external thread (11) are screwed together.

8. The SC type fiber optic connector as described in any one of claims 1 to 6, characterized in that, The inner arm of the tail sleeve (4) is provided with a snap ring groove (4a), and the end of the binding ring (1) away from the insert assembly (2) is provided with a snap ring protrusion (12), which snaps into the inner wall of the snap ring groove (4a). Alternatively, the inner wall of the tail sleeve (4) may be press-fitted with the outer wall of the ferrule (1).

9. The SC type fiber optic connector as described in any one of claims 1 to 6, characterized in that, The traction part (321) is provided with a traction hole (321a), or the traction part (321) is provided with a hook.

10. The SC type fiber optic connector as described in any one of claims 1 to 6, characterized in that, The outer wall of the clamping ring (1) is provided with at least two clamping planes (14), and each pair of clamping planes (14) is arranged parallel to each other.

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