A push-on fiber optic connector

Abstract

The utility model discloses a kind of air blowing type optical fiber connectors, belong to optical communication technical field, including detachable matching air blowing part and non-air blowing part, using the combination setting of ferrule, ferrule tail handle, spring, support and compression bushing in inner core assembly, so that inner core assembly can be preassembled with air blowing microcable, and meet the air blowing laying of air blowing microcable, and realize the quick disassembly of air blowing part after completing laying with non-air blowing part, realize the application of optical fiber connector. Air blowing type optical fiber connector in the utility model, its structure is compact, assembly is convenient, can satisfy the demand of air blowing laying, simplify operation procedure, shorten operation time, while guaranteeing the reliability of optical fiber connector assembly, realize the quick disassembly of air blowing part and non-air blowing part, realize the convenience when optical fiber connector is applied in air blowing scene.

Description

Technical Field

[0001] This utility model belongs to the field of optical communication technology, specifically relating to an air-blown fiber optic connector. Background Technology

[0002] With the continuous advancement of the fiber-to-the-home policy, air-blown optical cable technology has been widely applied and developed, which has also promoted the innovation of related supporting technologies.

[0003] To reduce the difficulty and procedures of fiber optic cable installation after air blowing to the home, pre-assembled fiber optic connectors have emerged. Through a detachable design, the core components required for fiber optic cable insertion are prefabricated and assembled with the optical cable in the factory. After the air blowing construction is completed on-site, the core components at the end of the air-blown optical cable are combined with other components of the fiber optic connector (such as the housing, tail sleeve, etc.). The assembly and setup of the fiber optic connector can be quickly completed on-site, thereby shortening the on-site operation time for optical cable laying and improving construction efficiency.

[0004] For pre-assembled fiber optic connectors, to ensure the reliability of subsequent use, the air-blown portion after installation needs to be assembled with the non-air-blown portions (housing, tail sleeve, etc.) of the connector. However, the assembly process for existing pre-assembled fiber optic connectors is often cumbersome, resulting in high assembly difficulty and low efficiency. Furthermore, separating the non-air-blown portions from the air-blown portions (e.g., replacing the housing, tail sleeve, etc.) after assembly is often difficult, limiting the application of fiber optic connectors. Utility Model Content

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides an air-blowing fiber optic connector that can meet the air-blowing requirements of air-blowing fiber optic connectors, realize the quick assembly and disassembly of air-blowing parts and non-air-blowing parts, and improve the ease of use of air-blowing fiber optic connectors.

[0006] To achieve the above objectives, this utility model provides an air-blown fiber optic connector, comprising an air-blown portion and a non-air-blown portion that are detachable from each other. The air-blown portion includes an inner core assembly and an air-blown microcable pre-assembled with the inner core assembly. The non-air-blown portion includes a housing with a through hole. The inner core assembly includes a ferrule, a ferrule tail, a spring, a support, and a press-fit bushing; One end of the insert is the insert body with a conductive end face, and the other end is the tail shank connection end; one end of the insert tail shank is connected to the tail shank connection end, and the other end is connected to the crimping bushing used to fix the end of the air-blown microcable; and The middle part of the ferrule includes a sleeve part and a support part coaxially arranged. The outer diameter of the sleeve part is larger than the outer diameter of the support part, and an annular stepped surface is formed at the junction of the sleeve part and the support part. The support member is sleeved on the outer periphery of the support part and can be axially limited by the annular stepped surface. One end of the spring is sleeved on the outer periphery of the sleeve part and axially limited, and the other end abuts against the end of the support member. The through hole is used for the detachable installation of the inner core assembly, and a fixing member is provided in the through hole so that the support member can be axially locked by the fixing member after the inner core assembly is installed in place.

[0007] As a further improvement of this utility model, the outer diameter of the ferrule body is not less than the outer diameter of the tail shank connection end; and the outer diameter of the ferrule body is not greater than 2.5mm, and the maximum outer diameter of the inner core assembly is not greater than 2.8mm.

[0008] As a further improvement of this utility model, the air-blowing fiber optic connector is an SC type fiber optic connector, and the outer diameter of the ferrule body is larger than the outer diameter of the tail connector end; and The outer diameter of the insert body is 2.5mm, and the outer diameter of the tail shank connection end is 1.2mm~2.2mm.

[0009] Based on the aforementioned small outer diameter design of the ferrule tail connector end, the outer diameter of the ferrule tail can be reduced when selecting SC type fiber optic connector ferrules, thereby controlling the outer diameter of the inner core assembly to be no more than 2.8mm. This satisfies the air-blowing requirement in a 5mm outer diameter / 3.5mm inner diameter microtube, allowing SC type fiber optic connectors to be air-blown in both 7mm outer diameter / 5mm inner diameter microtubes and 5mm outer diameter / 3.5mm inner diameter microtubes. Furthermore, the 5mm outer diameter / 3.5mm inner diameter microtube can be used for both LC type and SC type fiber optic connectors, significantly improving the flexibility and versatility of air-blown microcable laying. On this basis, it reduces the material and space costs associated with microtube laying, thereby improving the economic benefits of air-blown microcable application and construction.

[0010] Meanwhile, by further limiting the setting dimensions of the tail shank connection end, it is possible to fully balance the structural reliability and stability of the ferrule tail end while ensuring the reliability of the wall thickness of the anti-rotation interference assembly area.

[0011] As a further improvement of this utility model, the housing includes an inner frame and an outer shell that can be fitted onto the outer periphery of the inner frame. The through hole is axially disposed in the inner frame sleeve, and the fixing member consists of two elastic arms disposed opposite to each other on the inner frame sleeve; the support member can be clamped and fixed by the two elastic arms after the inner core assembly is embedded in the through hole.

[0012] As a further improvement of this utility model, the outer periphery of the support member is formed with an annular stepped surface; the two elastic arms can abut against the annular stepped surface and / or clamp the outer periphery of the support member after the inner core assembly and inner frame are assembled. or The support is a circular sleeve structure with an outer diameter larger than the inner diameter of the spring. After the insert tail is fitted, its end abuts against the end of the spring. The support has a groove circumferentially formed around its middle outer periphery, and the two elastic arms can clamp the groove when the inner core assembly and the inner frame are fitted into place.

[0013] By utilizing the corresponding design of the two configuration forms of the support, the support can reliably match the two elastic arms within the inner frame, allowing the ends of the two elastic arms to abut against the inner wall of the annular step surface or groove formed by the large and small diameter ends. This ensures that the two elastic arms axially lock the support after matching with it, thus ensuring the reliability of the fiber optic connector during subsequent use.

[0014] As a further improvement of this utility model, the ends of the two elastic arms facing each other are respectively provided with limiting protrusions, and the distance between the two limiting protrusions is not greater than the outer diameter of the part of the support member used for clamping.

[0015] By utilizing the corresponding design of the limiting protrusions, the reliability and accuracy of the elastic arm clamping setup can be further improved.

[0016] As a further improvement of this utility model, the air-blowing fiber optic connector is an LC type fiber optic connector, and the housing is an outer frame with a through hole and a fixing member.

[0017] As a further improvement of this utility model, the tail shank connecting end is connected to one end of the ferrule tail shank by an interference fit. And / or, One end of the crimping bushing is connected to the end of the ferrule tail via a thread; and / or The crimped bushing is fixed to the end of the air-blown microcable by crimping or bonding. and / or The inner core assembly also includes a dust cap for covering the outer periphery of the insert body.

[0018] As a further improvement of this utility model, the end of the ferrule used to connect the ferrule is provided with an anti-rotation part; the outer diameter of the anti-rotation part is larger than the outer diameter of the sleeve part, and a non-rotating body structure is formed at the end of the anti-rotation part away from the sleeve part. Accordingly, the middle part of the through hole is provided with an anti-rotation hole whose inner contour corresponds to the outer contour of the non-rotating body structure, for the alignment and embedding of the ferrule tail in the through hole.

[0019] As a further improvement of this utility model, the non-air-blown part also includes a tail sleeve, and a tail sleeve connecting part is provided at the tail end of the inner frame sleeve; the tail sleeve can be sleeved on the tail sleeve connecting part after the inner core assembly passes through the tail sleeve. and / or An indicator mark is provided on the outer periphery of the housing, and an mark is provided on the outer periphery of the ferrule corresponding to the indicator mark.

[0020] By using the alignment settings of the indicator signs, the alignment of the inner core components and the inner frame can be effectively achieved, avoiding jamming or damage caused by inaccurate alignment of the inner core components, and ensuring the directionality and accuracy of the inner core component assembly.

[0021] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0022] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include: This utility model discloses an air-blown fiber optic connector, which includes a detachable and mating air-blown part and a non-air-blown part. The inner core assembly utilizes a combination of a ferrule, ferrule tail, spring, support, and crimping bushing to allow pre-assembly of the inner core assembly with air-blown microcables and to facilitate air-blown laying of the microcables. Simultaneously, the structural design of the ferrule tail and support enables rapid assembly and disassembly of the inner core assembly from the housing. An annular stepped surface limits the ferrule's retraction distance, preventing damage or breakage of the fiber unit due to excessive ferrule retraction and ensuring the reliability of the fiber optic connector. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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 from these drawings without creative effort.

[0024] Figure 1 This is a structural disassembly diagram of the air-blown fiber optic connector in an embodiment of this utility model; Figure 2 This is an assembly diagram of the air-blown fiber optic connector in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the assembled structure of the air-blown fiber optic connector in this embodiment of the present invention; Figure 4 This is a disassembled diagram of the inner core assembly structure of the air-blown fiber optic connector in this embodiment of the present invention; Figure 5 This is a schematic diagram of the insert structure of the inner core assembly in an embodiment of this utility model; Figure 6 This is a schematic diagram of the insert tailstock structure of the inner core assembly in an embodiment of this utility model; Figures 7-9 This is an assembly diagram of the insert and insert tail of the inner core assembly in an embodiment of this utility model; Figure 10 This is a schematic diagram of the support structure of the inner core component in an embodiment of this utility model; Figures 11-12 This is a schematic diagram of the press-fit bushing structure of the inner core component in an embodiment of this utility model; Figures 13-16 This is a schematic diagram of the inner frame structure of the air-blown optoelectronic connector in an embodiment of this utility model; Figure 17 This is a schematic diagram of the tail sleeve structure of the air-blown fiber optic connector in an embodiment of this utility model; Figure 18 This is a schematic diagram of the structure of the air-blown fiber optic connector after air blowing and assembly in an embodiment of this utility model; Figure 19 This is a structural disassembly diagram of the LC-type optoelectronic connector including the air-blowing part in the embodiments of this utility model; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100. Parts that cannot be blown with air; 200. Parts that cannot be blown with air; 1. Inner core assembly; 2. Air-blown microcable; 3. Inner frame; 4. Outer shell; 5. Tail sleeve; 6. Outer frame; 101. Plug; 1011. Plug body; 1012. Conductive end face; 1013. Tail handle connecting end; 102. Plug tail handle; 1021. Anti-rotation part; 1022. Sleeving part; 1023. Support part; 1024. Bushing connecting part; 103. Spring; 104. Support component; 105. Crimping bushing; 106. Dust cap; 201. Fiber optic unit; 202. Outer sheath; 301. Mounting hole; 302. Anti-rotation hole; 303. Socket hole; 304. Cantilever notch; 305. Flexible arm; 306. Limiting protrusion; 307. Indicator mark; 308. Tail sleeve connection part; 309. Locking protrusion. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] In the description of this utility model, it should be understood that, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, unless otherwise expressly defined, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] Below, for reference Figures 1-18 This invention describes a blow-type fiber optic connector according to a preferred embodiment of the present invention.

[0031] First, it is necessary to explain the difference between conventional fiber optic connectors and the air-blown fiber optic connectors in the preferred embodiment.

[0032] A conventional fiber optic connector is typically assembled from a fiber optic connector and a fiber optic cable. The fiber optic connector usually includes an inner core assembly with a ferrule, an inner frame, an outer shell, and a tail sleeve. By assembling and connecting the fiber optic units in the fiber optic cable with the tail end of the ferrule in the inner core assembly, and then assembling the corresponding components, a fiber optic connector with optical communication capabilities can be formed.

[0033] However, unlike conventional fiber optic connectors, the air-blown fiber optic connector in the preferred embodiment must not only meet the needs of optical communication, but also meet the air-blowing requirements of the optical cable in the air-blown microtube.

[0034] Currently, there are two specifications for air-blowing microtubes used in engineering construction for the entry section: 7mm / 5mm microtubes (outer diameter 7mm / inner diameter 5mm) and 5mm / 3.5mm microtubes (outer diameter 5mm / inner diameter 3.5mm). Based on practical engineering experience, the most suitable diameter for the air-blowing portion of the connector for these two types of microtubes is approximately 4mm and 2.8mm, respectively. Therefore, in existing technology, a 4mm diameter SC type connector (Square Connector) is used for air-blowing of 7mm / 5mm microtubes.

[0035] Meanwhile, the fiber optic connector in the preferred embodiment can be divided into an air-blown portion 100 and a non-air-blown portion 200, such as... Figure 1As shown in the diagram. The air-blowing section 100 includes an air-blowing microcable 2 and an inner core assembly 1 connected to one end of the air-blowing microcable 2. By controlling the maximum outer diameter of the inner core assembly 1, the inner core assembly 1 meets the air-blowing requirements within the air-blowing microtube. Correspondingly, the non-air-blowing section 200 includes an inner frame 3, an outer shell 4, and a tail sleeve 5 with a larger outer diameter. Due to size limitations, it cannot be air-blown after assembly and needs to be assembled with the inner core assembly 1 at the end of the air-blowing microcable 2 to form a fiber optic connector after air-blowing is completed.

[0036] The reason for pre-assembling the inner core component 1 with the air-blown microcable 2 is that the assembly process of the ferrule 101 involves ferrule grinding, optical cable crimping and other processes. If the above processes are carried out directly on the air-blowing site, it will not only affect the efficiency of on-site construction, but also fail to effectively guarantee the quality of the assembly of the inner core component 1.

[0037] Therefore, for the fiber optic connector in the preferred embodiment, its inner core component 1 and air-blown microcable 2 are pre-assembled in the factory, including crimping and fixing between the air-blown microcable 2 and the inner core component 1, and polishing of the ferrule 101. Thus, when air-blowing construction is required, the air-blown microcable 2, pre-assembled with the inner core component 1 in the factory, can be directly placed into the air-blowing microtube for air blowing, and the inner core component 1 is assembled with the remaining components of the fiber optic connector at the end of the microcable wiring to form a fiber optic connector ready for mating.

[0038] Specifically, for the fiber optic connector in the preferred embodiment, its inner core assembly 1 includes a ferrule 101, a ferrule tail 102, a spring 103, a support 104, and a crimping bushing 105 arranged sequentially along the axial direction, such as... Figure 4 As shown in the image.

[0039] Among them, one end of the ferrule 101 is the ferrule body 1011 with a conductive end face 1012, and the other end is the tail connector end 1013 for connecting the ferrule tail 102, such as Figure 5 As shown in the diagram. In actual setup, the grinding process of the insert 101 requires a positioning direction, which is usually carried out after the tail end of the insert 101 (the end opposite to the conductive end face 1012) is assembled with the insert tail shank 102; and the connection between the insert 101 and the insert tail shank 102 is preferably achieved by an interference fit, that is, the tail end of the insert 101 is embedded into the interference fit hole at the end of the insert tail shank 102.

[0040] For the fiber optic connector in the preferred embodiment, the outer diameter of its ferrule body 1011 is preferably not smaller than that of the tail connector end 1013, for example, in... Figure 5In the preferred embodiment shown, the outer diameter of the insert body 1011 is larger than the outer diameter of the tail connector end 1013. Meanwhile, to meet the air blowing requirements of the inner core assembly 1 in 5mm / 3.5mm and 7mm / 5mm microtubes, the outer diameter of the insert body 1011 in the preferred embodiment is preferably no greater than 2.5mm, and the maximum outer diameter of the inner core assembly 1 is preferably no greater than 2.8mm.

[0041] More specifically, in the preferred embodiment, the fiber optic connector is preferably an SC-type fiber optic connector, wherein the outer diameter of its ferrule body 1011 is larger than the outer diameter of its tail connector end 1013, and the outer diameter of the ferrule body 1011 is 2.5 mm. In the design of the fiber optic connector, to obtain the optimal air blowing distance within a 5 mm outer diameter / 3.5 mm inner diameter air blowing microtube, the preferred air blowing outer diameter is typically no more than 2.8 mm. Therefore, if the tail end of the ferrule 101 of the SC-type fiber optic connector is directly subjected to interference fitting, the wall thickness of the interference fitting section of the ferrule tail 102 will be... d It will not exceed 0.15mm (as determined by the formula). d =Calculated as (2.8-2.5) / 2). This wall thickness value is too small and difficult to achieve in practical engineering applications.

[0042] Therefore, in a preferred embodiment, the tail end of the ferrule 101 is configured as a variable diameter type, that is, a tail shank connection end 1013 with an outer diameter smaller than that of the ferrule body 1011 is provided at the end of the ferrule body 1011 facing away from the conductive end face 1012, such as... Figure 5 As shown in the diagram, the assembly connection between the ferrule 101 and the ferrule 102 is achieved by using an interference fit between the tail shank connecting end 1013 and the end of the ferrule tail shank 102, as illustrated. Figures 7-9 As shown in the image.

[0043] More specifically, in the preferred embodiment, the outer diameter of the tail shank connection end 1013 is preferably 1.2mm to 2.2mm, and more preferably 1.2mm to 1.8mm. This ensures that the wall thickness of the interference fit section of the ferrule tail shank 102 is not too small, i.e., the wall thickness is between 0.3mm and 0.8mm, and more preferably between 0.5mm and 0.8mm.

[0044] Based on the aforementioned design of the tail connector 1013, the outer diameter of the air-blowing part of the SC connector is not too large, thus meeting its laying requirements in 5mm / 3.5mm microtubes. This satisfies the air-blowing laying requirements of the SC connector in both types of microtubes, thereby increasing the flexibility of air-blowing micro-cable technology selection, effectively saving pipeline resources and microtube material costs, and resulting in significant economic benefits.

[0045] It is understood that, in addition to the aforementioned SC type connector, the fiber optic connector can also be a smaller LC type connector. In this case, the housing of the non-air-blown portion 200 preferably only includes an outer frame 6 with a through hole, and the air-blown portion 100, after air-blown installation, has its inner core assembly 1 embedded in the through hole in the outer frame 6. Accordingly, the fastener on the outer frame 6 is preferably... Figure 19 The two elastic clamping arms shown on the outer frame sleeve 6 will not be described in detail here.

[0046] It is understood that in LC type fiber optic connectors, the outer diameter of the ferrule 101 is generally smaller than that of the ferrule in SC type connectors, preferably 1.25mm. In this case, the tail end of the ferrule 101 does not need to be designed with a diameter change and can be directly connected to the ferrule tail 102.

[0047] Furthermore, in the preferred embodiment, one end of the ferrule tail 102 is connected to the tail ferrule connecting end 1013, and the other end is connected to the crimping bushing 105. Meanwhile, the middle portion of the ferrule tail 102 has a coaxially arranged sleeve portion 1022 and a support portion 1023. The outer diameter of the sleeve portion 1022 is larger than the outer diameter of the support portion 1023, and an annular stepped surface is formed at the junction of the two.

[0048] Correspondingly, one end of the spring 103 is sleeved on the outer periphery of the sleeve portion 1022 and axially limited, while the other end extends beyond the annular stepped surface and abuts against the support member 104 sleeved on the outer periphery of the support portion 1023. Simultaneously, the inner diameter of the support member 104 is smaller than the outer diameter of the sleeve portion 1022, allowing the annular stepped surface to axially limit the support member 104 and thereby limit the maximum compression dimension of the spring 103, preventing damage or breakage of the fiber optic unit 201 due to excessive retraction of the ferrule 101. Furthermore, based on the annular stepped surface, after the inner core assembly 1 is assembled within the housing, force can be transferred by pressing the inner core assembly 1 from one end of the ferrule 101 until the support member 104 abuts against the annular stepped surface. This prevents damage to the fiber optic unit 201 while enabling quick disassembly of the inner core assembly 1 within the housing, greatly facilitating subsequent housing replacement of the fiber optic connector.

[0049] More preferably, to ensure ease of processing of the spring 103 and reliability of subsequent elastic force provision, the outer diameter of the sleeve portion 1022 in the preferred embodiment is preferably no greater than 2.2 mm, and more preferably between 1.2 and 1.8 mm. Meanwhile, the outer diameter of the support portion 1023 in the preferred embodiment is preferably between 1.0 mm and 1.6 mm, and the width of the annular step surface is preferably between 0.2 mm and 0.6 mm.

[0050] Furthermore, for the aforementioned SC type fiber optic connector, the housing in its non-air-blown portion preferably includes, as follows: Figure 1The inner frame 3 and outer shell 4 are shown in the figure. The outer shell 4 can be fitted onto the outer periphery of the inner frame 3 and fixed. The fixing method between the two can be a snap-fit ​​fixation, a time limit fixation, or a partial threaded connection, which will not be described in detail here.

[0051] Correspondingly, a through hole is formed in the inner frame sleeve 3, which extends axially, and two elastic arms 305 are provided on the inner frame sleeve 3, which can be used to lock the support member 104 axially.

[0052] More specifically, in the preferred embodiment, the insert tail shank 102 is as follows: Figure 6 As shown, an axial through hole is provided in the middle along the axial direction for the optical fiber unit 201 to pass through, and anti-rotation part 1021 and bushing connection part 1024 are respectively provided at both ends. The former is used to connect with the tail shank connection end 1013 at the tail of the ferrule 101, and the latter is used to connect with the crimping bushing 105.

[0053] In actual installation, the outer diameter of the anti-rotation part 1021 is preferably no greater than 2.8 mm, and its end opposite to the sleeve part 1022 has an axially formed assembly hole. The assembly hole is coaxially formed with the axial through hole and is used for interference fit with the aforementioned tail shank connecting end 1013. It can be understood that the inner diameter of the assembly hole corresponds to the outer diameter of the tail shank connecting end 1013, as long as the interference fit between the two can be satisfied, which will not be elaborated here.

[0054] More specifically, several facets are provided on the outer periphery of the anti-rotation part 1021, each facet extending from the middle of the anti-rotation part 1021 to the side end face of the anti-rotation part 1021 opposite to the sleeve part 1022. By utilizing these facets, the anti-rotation part 1021 becomes a non-rotating structure, ensuring that after the anti-rotation part 1021 is subsequently matched and fitted with anti-rotation holes 302 corresponding to the outer contour of the anti-rotation part 1021, the anti-rotation part 1021 and even the insert 101 can achieve circumferential positioning, ensuring that the insert 101 is inserted in the expected direction and guaranteeing the accuracy of the insert 101's fitting.

[0055] It is understandable that, in actual installation, the various parts of the insert tail shank 102 are integrally formed, that is, the non-rotating structure of the anti-rotation part 1021 is integrally formed. Of course, depending on actual needs, a rotating structure can be made first, and then the non-rotating structure can be cut out, which will not be elaborated here.

[0056] Furthermore, in the preferred embodiment, the sleeve portion 1022 is used for sleeve of the spring 103, and the outer diameter of the spring 103 is not greater than 2.8 mm; more specifically, the outer diameter of the spring 103 is preferably not greater than the outer diameter of the anti-rotation portion 1021.

[0057] like Figure 3As shown, in the preferred embodiment, the support member 104 is sleeved on the outer periphery of the support portion 1023. The outer diameter of one end or the middle of the support member 104 is larger than the inner diameter of the spring 103, so that the end of the spring 103 away from the anti-rotation portion 1021 can be abutted and limited by the support member 104.

[0058] As a feasible example, in the preferred embodiment, the support member 104 is in the form of a stepped shaft, which includes a large-diameter end for abutting the spring 103 and a small-diameter end with an outer diameter smaller than the large-diameter end, and an annular stepped surface is formed at the junction of the large-diameter end and the small-diameter end, such as... Figure 10 As shown in the diagram. The reason why the support member 104 is set in the above form is to facilitate the axial assembly between the inner frame sleeve 3 and the support member 104, as detailed in the following description.

[0059] Of course, in addition to the above-mentioned configuration, the support member 104 can also be configured in other forms as needed, as long as it can meet the abutment support of the spring 103 and the matching requirements of the subsequent elastic arm 305. For example, an annular protrusion or flange structure can be provided on the outer periphery of the middle part of the support member 104, forming an annular stepped surface, which abuts and limits the elastic arm 305 on the inner frame sleeve 3.

[0060] As another feasible example, in the preferred embodiment, the support member 104 is configured as a cylindrical structure (not shown in the figure), which can be sleeved on the outer periphery of the sleeve portion 1022 (when the support portion 1023 is not provided) or the support portion 1023. The outer diameter of the support member 104 is larger than the inner diameter of the spring 103, ensuring that one end of the spring 103 can abut against the end of the support member 104. At the same time, a groove is provided circumferentially on the outer periphery of the middle part of the support member 104, so that when the support member 104 is matched with the two elastic arms 305, the limiting protrusions 306 of the two elastic arms 305 can be correspondingly embedded in the aforementioned groove, thereby realizing the axial limiting of the support member 104 within the inner frame sleeve 3.

[0061] It is understood that, for the spring 103 in the preferred embodiment, its free length is greater than the length of the sleeve portion 1022, so as to ensure that after the inner core assembly 1 and the inner frame sleeve 3 are assembled (the support member 104 is axially positioned), the spring 103 has a certain compression space to reliably press the conductive end face 1012 of the insert 101 onto the conductive part of the adapter / connector female head.

[0062] Furthermore, in the preferred embodiment, the press-fit bushing 105 is as follows: Figures 11-12 As shown, one end of it is used to connect with the bushing connection part 1024 at the end of the ferrule 102, and the other end is used to press and fix it to the outer periphery of the air-blown microcable 2.

[0063] As a feasible example, in the preferred embodiment, the ferrule 102 and the crimping bushing 105 are connected by threads. That is, an external thread is provided on the outer periphery of the end of the support portion 1023, and an internal thread is provided on the inner periphery of one end of the crimping bushing 105. The two are connected by threads. Correspondingly, the other end of the crimping bushing 105 is tightly fixed to the outer sheath 202 at the end of the air-blown microcable 2 by crimping.

[0064] In actual installation, the outer diameter of the sleeve portion 1022 is the same as or slightly smaller than the inner diameter of the spring 103. This arrangement can effectively ensure the stability of the spring 103 at one end of the outer circumference of the sleeve portion 1022, avoid the wobbling of the end of the spring 103, and ensure the stability of the spring 103 supporting the insert 101.

[0065] Furthermore, such as Figure 11 , Figure 12 As shown, in the preferred embodiment, the crimping bushing 105 is in the form of a sleeve, with one end serving as a connecting end for connecting to the bushing connection portion 1024 at one end of the insert tail shank 102, and the other end serving as a crimping end for fixing the air-blown microcable 2. Preferably, the connecting end of the crimping bushing 105 and the bushing connection portion 1024 are connected by a thread, and the inner diameter of the crimping end is equal to or slightly larger than the outer diameter of the air-blown microcable 2, so that the unstripped air-blown microcable 2 (i.e., the air-blown microcable 2 with the outer sheath 202) can be coaxially embedded into the crimping end of the crimping bushing 105 and fixed (by crimping and / or gluing).

[0066] By using the connection of the crimping bushing 105 to the tail of the insert shank 102 (bushel connection 1024), the support member 104 can be axially limited, preventing the spring 103 from releasing its contact with the support member 104.

[0067] In actual settings, such as Figure 12 As shown, the inner diameters of the two ends of the crimping bushing 105 are preferably different, with the inner diameter of the crimping end being larger than that of the connecting end, and an annular step is formed at the junction of the two for axial limiting when the air-blown microcable 2 is inserted. Of course, depending on the configuration requirements, the inner diameters of the two ends of the crimping bushing 105 can also be the same, and a limiting part with an inner diameter smaller than that of the two ends is formed in the middle, forming two annular steps, which respectively limit the end of the air-blown microcable 2 and limit the connection of the bushing connecting part 1024 on the insert tail shank 102.

[0068] In summary, for the inner core assembly 1 in the preferred embodiment, the maximum outer diameter within its axial range is no greater than 2.8 mm. This is mainly because the outer diameters of the anti-rotation part 1021 of the ferrule 102, the spring 103, the support 104, and the pressing bushing 105 are no greater than 2.8 mm. Furthermore, to complement the above configuration, the tail end of the ferrule 101 is further configured as a stepped shaft. This ensures that while the outer diameter of the ferrule body 1011 remains constant at 2.5 mm, the tail end 1013 of the ferrule 101 can reliably connect to the ferrule 102, guaranteeing the reliability and operability of the connection and preventing weak points from forming at the connection point.

[0069] In actual installation, the aforementioned inner core assembly 1 and air-blown microcable 2 are pre-assembled in the factory. This involves stripping the fiber optic unit 201 from one end of the air-blown microcable 2 and peeling off the outer coating of the fiber optic unit 201. Simultaneously, the ferrule 101, ferrule tail 102, spring 103, support 104, and crimping bushing 105 are assembled sequentially. Then, using an adhesive injection process, the fiber optic unit 201 is passed sequentially through the crimping bushing 105, ferrule tail 102, and ferrule body 1011, completing the assembly connection between the fiber optic unit 201 and the ferrule 101. After adhesive curing and end-face grinding of the ferrule 101, the inner core assembly 1 and the air-blown microcable 2 are factory-assembled, forming an air-blown inner core assembly 1 at one end of the air-blown microcable 2. Of course, the grinding and cleaning processes performed on the ferrule 101 during factory pre-assembly utilize mature existing technologies and will not be elaborated upon here.

[0070] More specifically, in order to ensure reliable protection of the conductive end face 1012 of the ferrule 101 during air-blowing installation of the inner core assembly 1, the inner core assembly 1 in the preferred embodiment further includes a dust cap 106, which can be directly covered on the outer periphery of the ferrule body 1011 and provide protection for the outer periphery of the ferrule body 1011 and the conductive end face 1012, ensuring that the ferrule 101 can be accurately protected during the air-blowing process of the micro-cable, and avoiding contamination and wear of the conductive end face 1012.

[0071] In actual installation, one end of the dust cap 106 is spherical or hemispherical to reduce the contact friction between the pre-assembled inner core assembly 1 at the end of the air-blown microcable 2 and the inner wall of the air-blown microtube during air-blown laying. It can be understood that, in actual installation, the outer diameter of the dust cap 106 is also below 2.8 mm.

[0072] Furthermore, such as Figure 13 As shown, in the preferred embodiment, the inner frame sleeve 3 has a square sleeve structure with a through hole in the middle for inserting and installing the pre-assembled inner core component 1 at the end of the air-blown microcable 2.

[0073] Specifically, for the through hole in the middle of the inner frame sleeve 3, an anti-rotation hole 302 is formed in the middle of the inner contour that corresponds to the outer contour of the non-rotating part of the anti-rotation part 1021, so that the pre-assembled inner core assembly 1 can be directly inserted from the tail end of the inner frame sleeve 3, and the anti-rotation part 1021 is aligned and embedded in the anti-rotation hole 302, thereby realizing the circumferential positioning of the insert 101.

[0074] Meanwhile, a sleeve hole 303 is provided on the axial side of the anti-rotation hole 302 (the tail end side of the inner frame sleeve 3), and its inner diameter is not less than the maximum outer diameter of the inner core assembly 1, so as to ensure that the insert tail 102 of the inner core assembly 1 and the various components assembled with the insert tail 102 (i.e., spring 103, support 104, and pressing bushing 105) can be fully inserted into the sleeve hole 303 when the anti-rotation part 1021 is aligned and inserted into the anti-rotation hole 302.

[0075] Correspondingly, the ferrule body 1011 extends into the fitting hole 301 formed at the other end of the anti-rotation hole 302. Depending on the actual setup requirements, the conductive end face 1012 of the ferrule body 1011 can extend beyond the fitting hole 301, for example, extending 1.85~2.15mm beyond the end face of the inner frame sleeve 3. Of course, in some special cases, the conductive end face 1012 can also be located within the fitting hole 301 as needed, which will not be elaborated here.

[0076] For the fitting hole 301 in the preferred embodiment, its inner diameter is not less than the outer diameter of the dust cap 106, specifically 4.8~4.9mm, so that after the inner core assembly 1 and the inner frame sleeve 3 are assembled, the dust cap 106 can be directly fitted onto the outer periphery of the insert body 1011 to provide protection for the insert 101 when it is not in use.

[0077] In actual setup, the fitting hole 301 and the anti-rotation hole 302 are preferably pre-set on an end insert, and the inner circumference of the inner frame sleeve 3 is provided with a through hole along the axial direction. The end insert can be assembled and embedded in one end of the through hole after the pre-made central through hole (i.e., the fitting hole 301 and the anti-rotation hole 302 are opened), and a sleeve hole 303 is formed at the other end of the end insert to realize the assembly and setup of each component of the inner core assembly 1.

[0078] More specifically, in the preferred embodiment, cantilever notches 304 are provided opposite to each other on the outer peripheral wall of the inner frame sleeve 3, and two oppositely arranged elastic arms 305 are obtained by the opening of the two cantilever notches 304. The opposite ends of the two elastic arms 305 are respectively provided with limiting protrusions 306, which are used to abut against the annular step surface of the outer periphery of the support member 104 and / or clamp the outer periphery of the support member 104 after the support member 104 is embedded in place, so as to realize the axial limiting of the support member 104.

[0079] For example, in such Figure 3In the preferred embodiment shown, the limiting protrusions 306 of the two elastic arms 305 abut against the annular step formed at the end of the support member 104 due to the variable diameter shaft design, and also clamp the outer periphery of the support member 104, thus fully ensuring the reliability of the axial limiting of the support member 104.

[0080] Meanwhile, for the axially limiting support member 104, when it is sleeved on the outer periphery of the support part 1023, the end face of its abutting spring 103 is a certain distance away from the end of the sleeve part 1022, so that the ferrule 101 can be retracted a certain distance in the axial direction to ensure the conduction quality during subsequent fiber optic connector insertion and assembly. Of course, based on the variable diameter setting of the sleeve part 1022 and the support part 1023, an annular step is formed at the junction between the two. When there is a need to disassemble and separate the inner core assembly 1 and the inner frame sleeve 3, the support member 104 can be abutted against the annular step between the sleeve part 1022 and the support part 1023 by pressing the ferrule 101 backward, and the force is transmitted to the support member 104. After that, if force is applied to the ferrule 101 from the conducting end face 1012, the two elastic arms 305 can be forced to spring up, release the lock between them and the support member 104, and then the inner core assembly 1 can be removed from the inner frame sleeve 3.

[0081] In actual setup, the distance between the two limiting protrusions 306 is less than the maximum outer diameter of the inner core component 1, so that when the inner core component 1 is inserted into the inner frame sleeve 3, the two elastic arms 305 need to be spread apart to ensure that the two elastic arms 305 apply a certain clamping force to the subsequent clamped object.

[0082] More specifically, for the inner frame 3 in the preferred embodiment, an indicator mark 307 is provided on its outer peripheral wall. The indicator mark 307 is formed on the outer peripheral wall of the inner frame 3 by means of grooving, coating, pasting, etc., to quickly identify the front and back of the inner frame 3, so as to facilitate the alignment of the inner core component 1 when it is inserted.

[0083] More preferably, an indicator corresponding to the indicator 307 is also provided on the outer periphery of the inner core component 1. It is further preferred to be provided on the outer periphery of the anti-rotation part 1021, so that when the inner core component 1 extends into the inner frame sleeve 3 and the anti-rotation part 1021 passes the cantilever notch 304, it can be directly identified whether the indicator on the inner core component 1 is aligned with the indicator 307 on the inner frame sleeve 3, so as to avoid the situation where the anti-rotation part 1021 cannot be inserted into the anti-rotation hole 302, and ensure the accuracy of the assembly of the inner core component 1 in the inner frame sleeve 3.

[0084] By embedding the anti-rotation part 1021 in the anti-rotation hole 302 and clamping the support member 104 at the two elastic arms 305, the circumferential support of the ferrule 102 within the inner frame sleeve 3 can be effectively achieved, ensuring the axial holding capability of the ferrule 101. Furthermore, by using the support member 104 on the ferrule 102, in conjunction with the spring 103, the ferrule 101 can move axially a certain distance during insertion (compressing the spring 103 and retracting). Of course, it can be understood that the axial displacement distance of the ferrule 101 does not exceed the length of the anti-rotation part 1021 embedded in the anti-rotation hole 302, ensuring that the anti-rotation part 1021 never disengages from the anti-rotation hole 302, thus ensuring the stability of the connector's insertion and conduction performance.

[0085] More preferably, a tail sleeve connecting part 308 is coaxially provided at the tail of the inner frame sleeve 3, and a tail sleeve 5 is correspondingly provided, such as... Figure 17 As shown in the figure. Accordingly, a locking protrusion 309 is provided on the outer periphery of the tail sleeve connecting part 308, and a corresponding locking hole is provided on the tail sleeve 5, so that after the tail sleeve 5 is fitted into the outer periphery of the tail sleeve connecting part 308, each locking protrusion 309 is just embedded in the locking hole.

[0086] In actual setup, the number of locking protrusions 309 is no less than two, for example, two, three, or more arranged in a circumferential pattern. Correspondingly, the number of locking holes on the tail sleeve 5 is equal to the number of locking protrusions 309.

[0087] Furthermore, in the preferred embodiment, the air-blown fiber optic connector also includes a housing 4, which can be fitted onto the inner frame 3 after the inner core assembly 1 is assembled with the inner frame 3, thereby completing the assembly of the fiber optic connector. The configuration and matching method of the housing 4 in the preferred embodiment are conventional technologies and will not be described further here.

[0088] For the fiber optic connector after the outer shell 4 is assembled, the front end of the outer shell 4 is flush with the insertion end of the inner frame sleeve 3, and the rear end of the outer shell 4 covers the end of the tail sleeve 5 with the locking hole to hide the locking hole of the tail sleeve 5, thereby preventing the tail sleeve 5 from being manually disassembled or passively dropped during the use of the fiber optic connector, thus ensuring the reliability of the tail sleeve 5. Of course, if necessary, the assembly between the outer shell 4 and the inner frame sleeve 3 can be separated first, and then the tail sleeve 5 can be disassembled.

[0089] For the air-blowing fiber optic connector in the preferred embodiment, the assembly process is preferably as follows: During the factory preparation stage, the inner core assembly 1, inner frame sleeve 3, outer shell 4 and tail sleeve 5 are prepared accordingly; the ferrule 101 of the inner core assembly 1 is coaxially interference-fitted with the anti-rotation part 1021 of the ferrule tail 102 with its tail handle connecting end 1013 to obtain the assembled ferrule assembly. During the factory pre-assembly stage, the outer sheath 202 is stripped from one end of the air-blown microcable 2, exposing a certain length of optical fiber unit 201. The surface layer of the optical fiber unit 201 is then removed for later use. Simultaneously, the ferrule 101, ferrule tail 102, spring 103, support 104, and crimping bushing 105 are assembled to form the assembled inner core assembly 1. Subsequently, adhesive is injected into the central through-holes of the inner core assembly 1 (the central through-holes in the ferrule body 1011, the central through-hole in the ferrule tail 102, and the central through-hole in the crimping bushing 105), and the optical fiber unit 201 is inserted into the inner core assembly 1 from one end of the crimping bushing 105 until the optical fiber unit 201 and the ferrule 101 are fully assembled and connected. Afterward, the conductive end face 1012 of the ferrule 101 and the end of the optical fiber unit 201 are polished, and a dust cap 106 is placed over the ferrule body 1011 after the conductive end face 1012 has been polished. During the air-blowing stage of the air-blowing micro-cable 2, the air-blowing micro-cable 2 pre-assembled with the inner core component 1 is air-blown and laid until the end of the air-blowing micro-cable 2 with the inner core component 1 extends to the terminal position of the wiring. During the assembly process of the optical cable connector, the inner core assembly 1 is first inserted into the tail sleeve 5 from its tail end, and the tail sleeve 5 is then fitted onto the outer periphery of the air-blown micro-cable 2. Next, the dust cap 106 is removed, and the ferrule 101 is inserted into the inner frame sleeve 3 from its tail end. During the insertion of the ferrule 101 into the inner frame sleeve 3, the two elastic arms 305 on the inner frame sleeve 3 are opened, and the ferrule 101, anti-rotation part 1021, and spring 103 of the inner core assembly 1 successively pass over the two elastic arms 305. 5. Continue until the anti-rotation part 1021 of the ferrule 102 is aligned and inserted into the anti-rotation hole 302, and the two elastic arms 305 finally abut against the annular stepped surface on the outer periphery of the support 104 and / or are crimped and clamped on the outer periphery of the support 104, completing the assembly between the inner core assembly 1 and the inner frame sleeve 3; thereafter, the tail sleeve 5 is fitted onto the tail sleeve connecting part 308 and fixed, and the outer shell 4 is placed over the outer periphery of the inner frame sleeve 3, completing the assembly of the air-blown fiber optic connector, resulting in the following... Figure 18 The fiber optic connector shown.

[0090] For the fiber optic connector in the preferred embodiment of this utility model, it is preferably an SC type fiber optic connector. The outer diameter of the ferrule body 1011 of its inner core assembly 1 is 2.5mm, but the maximum outer diameter of the inner core assembly 1 does not exceed 2.8mm. It can be used for air blowing operations of air blowing microtubes with an outer diameter of 5mm / inner diameter of 3.5mm and air blowing microtubes with an outer diameter of 7mm / inner diameter of 5mm. The assembly of the SC type fiber optic connector is completed after the air blowing process. Of course, it is understood that, under the premise of meeting the actual use requirements, the core design concept of the fiber optic connector in the preferred embodiment can also be applied to the preparation of other models and specifications of fiber optic connectors. The design specifications of each component of the fiber optic connector can also be adjusted according to actual needs, which will not be elaborated here.

[0091] The air-blowing fiber optic connector of this utility model has a compact structure and is easy to assemble. It can meet the needs of air-blowing laying, simplify the operation procedures on the air-blowing laying site, shorten the assembly time of the air-blowing fiber optic connector on the construction site, improve the laying efficiency of air-blowing micro-cables, and reduce the application cost of air-blowing micro-cables.

[0092] Furthermore, by combining the optimized design of the inner core component 1's structural form and dimensions, the system not only meets the requirements for SC-type fiber optic connector installation but also allows the air-blown microcable 2 pre-assembled with the inner core component 1 to be air-blown laid in an air-blown microtube with a 5mm outer diameter and a 3.5mm inner diameter. In this way, by laying only the same small-sized air-blown microtube, the usage requirements of both SC-type and LC-type fiber optic connectors can be met simultaneously, improving the versatility and flexibility of fiber optic cable laying. Moreover, based on the improved design of the fiber optic connector, conventional large-sized air-blown microtubes can be replaced by small-sized air-blown microtubes, thereby saving on material costs, construction costs, and space costs associated with microtubes, demonstrating excellent practical value.

[0093] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blown fiber optic connector, comprising a blown portion and a non-blown portion that are detachable from each other, the blown portion comprising an inner core assembly and a blown microcable pre-assembled with the inner core assembly; the non-blown portion comprising a housing having a through-hole; characterized in that, The inner core assembly includes a ferrule, a ferrule tail, a spring, a support, and a press-fit bushing; One end of the insert is the insert body with a conductive end face, and the other end is the tail shank connection end; one end of the insert tail shank is connected to the tail shank connection end, and the other end is connected to the crimping bushing used to fix the end of the air-blown microcable; and The middle part of the ferrule includes a sleeve part and a support part coaxially arranged. The outer diameter of the sleeve part is larger than the outer diameter of the support part, and an annular stepped surface is formed at the junction of the sleeve part and the support part. The support member is sleeved on the outer periphery of the support part and can be axially limited by the annular stepped surface. One end of the spring is sleeved on the outer periphery of the sleeve part and axially limited, and the other end abuts against the end of the support member. The through hole is used for the detachable installation of the inner core assembly, and a fixing member is provided in the through hole so that the support member can be axially locked by the fixing member after the inner core assembly is installed in place.

2. The air-blown fiber optic connector according to claim 1, characterized in that, The outer diameter of the insert body is not less than the outer diameter of the tailpiece connecting end; and The outer diameter of the ferrule body is no greater than 2.5 mm, and the maximum outer diameter of the inner core assembly is no greater than 2.8 mm.

3. The air-blown fiber optic connector according to claim 2, characterized in that, The blow-type fiber optic connector is an SC type fiber optic connector, and the outer diameter of the ferrule body is larger than the outer diameter of the tail connector end; and The outer diameter of the insert body is 2.5mm, and the outer diameter of the tail shank connection end is 1.2mm~2.2mm.

4. The air-blown fiber optic connector according to claim 1 or 3, characterized in that, The housing includes an inner frame and an outer shell that can be fitted onto the outer periphery of the inner frame; The through hole is axially disposed in the inner frame sleeve, and the fixing member consists of two elastic arms disposed opposite to each other on the inner frame sleeve; the support member can be clamped and fixed by the two elastic arms after the inner core assembly is embedded in the through hole.

5. The air-blown fiber optic connector according to claim 4, characterized in that, The outer periphery of the support member is formed with an annular stepped surface; the two elastic arms can abut against the annular stepped surface and / or clamp the outer periphery of the support member after the inner core assembly and inner frame are assembled. or The support is a circular sleeve structure with an outer diameter larger than the inner diameter of the spring. After the insert tail is fitted, its end abuts against the end of the spring. The support has a groove circumferentially formed around its middle outer periphery, and the two elastic arms can clamp the groove when the inner core assembly and the inner frame are fitted into place.

6. The air-blown fiber optic connector according to claim 5, characterized in that, The ends of the two elastic arms facing each other are respectively provided with limiting protrusions, and the distance between the two limiting protrusions is not greater than the outer diameter of the part of the support member used for clamping.

7. The air-blown fiber optic connector according to claim 1, characterized in that, The air-blown fiber optic connector is an LC type fiber optic connector, and the housing is an outer frame with through holes and fixing components.

8. The air-blown fiber optic connector according to any one of claims 1-3 and 5-7, characterized in that, The tail shank connecting end is connected to one end of the ferrule tail shank by an interference fit. And / or, One end of the crimping bushing is connected to the end of the ferrule tail via a thread; and / or The crimped bushing is fixed to the end of the air-blown microcable by crimping or bonding. and / or The inner core assembly also includes a dust cap for covering the outer periphery of the insert body.

9. The air-blown fiber optic connector according to any one of claims 1-3 and 5-7, characterized in that, The end of the ferrule used to connect the ferrule is provided with an anti-rotation part; the outer diameter of the anti-rotation part is larger than the outer diameter of the sleeve part, and a non-rotating body structure is formed at the end of the anti-rotation part away from the sleeve part. Accordingly, the middle part of the through hole is provided with an anti-rotation hole whose inner contour corresponds to the outer contour of the non-rotating body structure, for the alignment and embedding of the ferrule tail in the through hole.

10. The air-blown fiber optic connector according to claim 4, characterized in that, The non-air-blown part also includes a tail sleeve, and a tail sleeve connecting part is provided at the tail end of the inner frame sleeve; the tail sleeve can be sleeved on the tail sleeve connecting part after the inner core assembly passes through the tail sleeve. and / or An indicator mark is provided on the outer periphery of the inner frame sleeve, and an mark is provided on the outer periphery of the ferrule corresponding to the indicator mark.

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