Optical fiber pre-termination adapter

Abstract

The invention relates to the technical field of optical fiber switching, and provides an optical fiber pre-terminating adapter which comprises a plurality of outer protection assemblies, each outer protection assembly comprises a connecting end and an adapting end, each adapting end is used for being matched with different types of interfaces of corresponding terminal equipment, each outer protection assembly is provided with a containing cavity, the containing cavity is internally provided with a connecting assembly, and the connecting assembly is connected with the adapting end. One end of the connecting assembly is detachably connected with the optical fiber connector, the other end of the connecting assembly is connected with insertion cores of different interfaces, a waterproof assembly is arranged at the connecting end of the outer protection assembly, and the optical fiber connector is sleeved with the waterproof assembly. The optical fiber connector has the advantages of being simple in operation and convenient and fast to maintain, effectively solving the problem that different types of interfaces of various terminal devices are not matched with the optical fiber connector, and reducing equipment bid invitation difficulty and operation and maintenance cost.

Description

Technical Field

[0001] This application relates to the field of optical fiber adapter technology, and in particular to an optical fiber pre-terminated adapter. Background Technology

[0002] With the large-scale deployment of Fiber to the Home (FTTH) and the continuous upgrading of Optical Distribution Network (ODN) technology, third-generation ODN products have widely adopted pre-terminated technologies, significantly improving network construction efficiency and maintenance convenience, and reducing construction complexity and reliance on operators' technical skills. However, in actual deployment, the interface standards of terminal equipment from different manufacturers are not uniform, forcing operators to make differentiated purchases based on the interface types of the initial projects. This makes it difficult to achieve unified bidding for maintenance products, and instead increases the later maintenance costs.

[0003] In existing technologies, multi-functional fiber optic connectors are used to solve the problem that standard connectors cannot be adapted to different terminal equipment interfaces. However, since multi-functional fiber optic connectors are fixedly integrated with fiber optic patch cords, if different interfaces are to be adapted, the deployed standard connectors and fiber optic patch cords need to be replaced with multi-functional fiber optic connectors as a whole. This not only increases the operation and maintenance costs but also wastes resources.

[0004] In existing technologies, fiber optic adapters are used to connect the terminal device's interface to the standard connector, enabling the interface to be matched with the standard connector. However, existing fiber optic adapters can only match a single interface with the standard connector. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a fiber optic pre-terminated adapter that converts different types of interfaces of various existing terminal devices into a unified standard interface that matches fiber optic connectors, thereby achieving standardized management of later operation and maintenance and effectively reducing procurement and maintenance costs.

[0006] This application provides an optical fiber pre-terminated adapter, including: Multiple external protection components, each external protection component including a connection end and an adapter end, each of the adapter ends being used to match different types of interfaces of the corresponding terminal device; The outer protective component has a receiving cavity, in which a connecting component is disposed. One end of the connecting component is detachably connected to the fiber optic connector, and the other end of the connecting component is connected to the ferrule of the different interfaces. The connecting end of the outer protective component is provided with a waterproof component, which is sleeved on the fiber optic connector.

[0007] In some embodiments, the connecting assembly includes an inner shell, an inner core, a stop member, a ceramic sleeve, and an adapter. The stop member is located between the inner shell and the adapter. One end of the stop member is engaged with the inner shell, and the other end is engaged with the adapter. The inner walls of the inner shell, the stop member, and the adapter form an inner core channel. The inner core slides within the inner core channel. The ceramic sleeve is located within the adapter. One end of the inner core near the adapter is inserted into the ceramic sleeve, and the other end is located within the inner shell.

[0008] In some embodiments, the inner core includes a front insert, an insert fixing member, an optical fiber, and a rear insert. One end of the rear insert is connected to the ceramic sleeve, and the other end is connected to the insert fixing member. One end of the front insert is located inside the insert fixing member and is connected to the rear insert through the optical fiber, while the other end extends out of the insert fixing member.

[0009] In some embodiments, the adapter has a first latching portion and a second latching portion. One end of the first latching portion is fixedly connected to one end of the second latching portion, and the other end of the first latching portion is latched to the outer wall of the stop member. The other end of the second latching portion includes a first latching member, a second latching member, and a fixing seat. One end of the fixing seat is fixedly connected to one end of the first latching portion, and the first latching member and the second latching member are alternately installed on the other end of the fixing seat. The first latching member is latched to the optical fiber connector, and the second latching member is latched to the outer protective component.

[0010] In some embodiments, the second snap-fit ​​component includes a first snap-fit ​​post and a second snap-fit ​​post, the first snap-fit ​​post and the second snap-fit ​​post are disposed opposite to each other, the outer wall of the first snap-fit ​​post is provided with a first protrusion, the outer wall of the second snap-fit ​​post is provided with a second protrusion, and the first protrusion and the second protrusion are snap-fitted into snap-fit ​​grooves correspondingly disposed on the inner wall of the outer protective component.

[0011] In some embodiments, an elastic groove is provided axially on the side wall of the first snap-fit ​​portion, and a corresponding first boss is provided on the stop member, wherein the elastic groove engages with the first boss.

[0012] In some embodiments, a guide groove is provided on the inner wall of the first snap-fit ​​portion along the axial direction. The guide groove communicates with the elastic snap-fit ​​groove, so that the first boss can be snapped into the elastic snap-fit ​​groove along the guide groove.

[0013] In some embodiments, the outer wall of the stop member is provided with a limiting portion, and one side of the limiting portion is provided with a step. The limiting portion and the step cooperate with the inner wall of the outer protective component to perform axial limiting.

[0014] In some embodiments, the step is provided with a groove, which is circumferentially limited by the inner wall of the outer protective component.

[0015] In some embodiments, the inner wall of the outer protective component is provided with a neck and a stepped hole, the neck cooperates with the step, the stepped hole cooperates with the limiting part, and a limiting key is also provided on the neck, the limiting key cooperates with the slot to engage.

[0016] The beneficial effects that this application can achieve are: This application comprises multiple external protective components, each including a connecting end and an adapter end. Each adapter end is used to match different types of interfaces of the corresponding terminal equipment. Each external protective component has a receiving cavity containing a connecting component. One end of the connecting component is detachably connected to a fiber optic connector, and the other end is connected to the ferrule of a different interface. The connecting end of the external protective component is equipped with a waterproof component, which is fitted onto the fiber optic connector. When using the fiber optic pre-terminated adapter of this application to convert different types of interfaces into a unified interface compatible with the fiber optic connector, the connecting component is standardized, while the external protective components can be replaced according to the different interfaces of various terminal equipment. This allows for the conversion of different interfaces of various terminal equipment into interfaces compatible with the fiber optic connector. This fiber optic pre-terminated adapter is simple to install and easy to maintain, effectively solving the maintenance problems caused by the incompatibility between different types of interfaces of various terminal equipment and fiber optic connectors, and significantly reducing the difficulty of equipment bidding and maintenance costs.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This paper shows an overall schematic diagram of the optical fiber pre-terminated adapter of this application; Figure 2 A connection diagram of the fiber optic pre-terminated adapter of this application is shown; Figure 3 A schematic diagram of Scheme 1 of the fiber optic pre-terminated adapter of this application is shown; Figure 4 A cross-sectional view of the connection component of this application is shown; Figure 5A cross-sectional view of the fiber optic pre-terminated adapter of this application is shown; Figure 6 An exploded view of the connection components of this application is shown; Figure 7 A schematic diagram of the structure of the stop member of this application is shown; Figure 8 A schematic diagram of the insert fastener of this application is shown; Figure 9 A structural schematic diagram of the adapter of this application is shown; Figure 10 A cross-sectional view of the protective enclosure of this application is shown; Figure 11 A schematic diagram of Scheme 2 of the fiber optic pre-terminated adapter of this application is shown; Figure 12 A schematic diagram of Scheme 3 of the fiber optic pre-terminated adapter of this application is shown; Figure 13 A schematic diagram of the waterproof lock head of this application is shown; Figure 14 A schematic diagram of the locking nut of this application is shown.

[0020] 100. Connecting assembly; 101. Inner core; 1. Inner shell; 2. Front ferrule; 3. Ferrule fixing component; 301. Shoulder; 302. First ferrule; 303. Second ferrule; 304. Positioning groove; 4. Optical fiber; 5. Rear ferrule; 6. Spring; 7. Stop; 701. Limiting part; 702. Step; 703. Groove; 704. First boss; 705. Second boss; 706. Mounting cavity; 8. Ceramic sleeve; 9. Adapter Components; 91. First latching part; 92. Second latching part; 901. Elastic latching groove; 902. Cavity; 903. First latching component; 904. Second latching component; 9041. First latching post; 9042. Second latching post; 9043. First protrusion; 9044. Second protrusion; 905. Fixing base; 906. Guide groove; 10. Dust cap; 200. Outer protective component; 201. Connecting end; 202. Adaptor end; 11. First protective 1101. Protective outer shell; 1102. Neck; 1103. Limit key; 1104. Stepped hole; 1105. Snap-fit ​​groove; 12. First fixing member; 13. First sealing ring; 14. Second sealing ring; 15. First dust cover; 21. Second protective outer shell; 22. Second fixing member; 23. Third sealing ring; 24. Fourth sealing ring; 25. Second dust cover; 31. Third protective outer shell; 32. Third fixing member; 33. Fifth sealing ring; 34. 35. Sixth sealing ring; 36. Third dust cover; 37. Elastic clip; 38. Waterproof component; 19. Waterproof lock head; 10. Skirt; 11. Tabletop; 12. First external thread; 13. First internal thread; 14. Sealing surface; 15. Elastic sealing gasket; 16. Locking nut; 17. Second internal thread; 18. Arc surface; 19. Terminal equipment; 10. Interface; 20. Fiber optic connector. Detailed Implementation

[0021] The term "comprising" in the specification, claims, and accompanying drawings of this application is synonymous with "including," "containing," or "characterized in," and is inclusive of endpoints or open-ended, and does not exclude additional unstated elements or method steps. "Comprising" is a technical term used in the language of the claims, meaning that the stated element is present, but other elements may be added and still form a construction or method within the scope of the claims.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In existing technologies, fiber optic adapters are used between the terminal device's interface and the standard connector to achieve matching connections between the terminal device's interface and the standard connector. However, existing fiber optic adapters can only match a single interface with the standard connector. If different types of interfaces need to be connected to the standard connector, multiple fiber optic adapters must be provided, and they need to be replaced frequently. This is not only cumbersome to operate, but also causes unnecessary waste of resources.

[0026] like Figure 1-3 As shown, this application embodiment provides an optical fiber pre-terminated adapter, including: multiple outer protective components 200, each outer protective component 200 including a connection end 201 and an adapter end 202, each adapter end 202 being used to match different types of interfaces 401 of a corresponding terminal device 400, wherein each outer protective component 200 has a receiving cavity, a connection component 100 is disposed in the receiving cavity, one end of the connection component 100 is detachably connected to an optical fiber connector 500, and the other end of the connection component 100 is connected to the ferrule of different types of interfaces 401, and a waterproof component 300 is disposed on the connection end 201 of the outer protective component 200, the waterproof component 300 being sleeved on the optical fiber connector 500.

[0027] The fiber optic pre-terminated adapter of this application serves as a connection bridge between the terminal device 400 and the fiber optic connector 500, enabling the standard fiber optic connector 500 to connect to different types of interfaces 401 of different terminal devices 400. Based on this, the fiber optic pre-terminated adapter of this application includes multiple outer protective components 200, each of which includes a connection end 201 and an adapter end 202. When the fiber optic connector 500 is a standard component, the connection ends 201 of the multiple outer protective components 200 can be configured with the same structure. When the interfaces 401 on different terminal devices 400 are different, the adapter ends 202 of the outer protective components 200 are designed to be replaceable. When using the fiber optic pre-terminated adapter of this application to convert different types of interfaces 401 to interfaces compatible with fiber optic connectors 500, the connection component 100 and waterproof component 300 remain unchanged. Only the outer protective component 200 with a matching adapter end 202 needs to be selected according to the different interfaces 401. That is, the corresponding outer protective component 200 is replaced according to the needs of different types of interfaces 401, which effectively solves the maintenance problems caused by the incompatibility between different types of interfaces 401 of various terminal devices 400 and fiber optic connectors 500.

[0028] The adapter end 202 of the outer protective component 200 enables the connection component 100 to align with the ferrules inside different types of interfaces 401, ensuring smooth transmission of optical signals at the connection point. Simultaneously, the adapter end 202 mechanically matches and locks with different types of interfaces 401, ensuring a secure connection. The connection end 201 of the outer protective component 200 is threadedly connected to the waterproof component 300, ensuring a stable connection between the fiber optic pre-terminated adapter and the fiber optic connector 500, and preventing water from entering the adapter and affecting signal transmission. The fiber optic connector 500 is preferably a standard fiber optic connector.

[0029] Furthermore, the connecting assembly 100 includes an inner shell 1, an inner core 101, a stop 7, a ceramic sleeve 8, and an adapter 9. The stop 7 is located between the inner shell 1 and the adapter 9. One end of the stop 7 is engaged with the inner shell 1, and the other end is engaged with the adapter 9. The inner walls of the inner shell 1, the stop 7, and the adapter 9 form an inner core channel. The inner core 101 slides within the inner core channel. The ceramic sleeve 8 is located within the adapter 9. One end of the inner core 101 near the adapter 9 is inserted into the ceramic sleeve 8, and the other end is located within the inner shell 1.

[0030] like Figure 4-7As shown, the connecting component 100, as the core component of the fiber optic pre-terminated adapter, plays a crucial role in ensuring the stable transmission of optical signals. Therefore, the connecting component 100 must both guarantee a smooth optical signal transmission path and protect the path from external influences. Based on this, a protective shell consisting of an inner shell 1, a stop 7, and an adapter 9 is sequentially snapped together to form a protective shell for the inner core 101. An inner core channel is formed inside the protective shell, and the inner core 101 is placed within this channel. The adapter 9 has a cavity 902 inside, and a ceramic sleeve 8 is fixedly installed within this cavity 902. The ceramic sleeve 8 has open ends. The fiber optic connector 500 is inserted into one end of the ceramic sleeve 8, and one end of the inner core 101 is inserted into the other end of the ceramic sleeve 8. The inner core 101 is thus mated with the ferrule of the fiber optic connector 500 within the ceramic sleeve 8. The inner shell 1, the stop 7, and the adapter 9 are connected by a snap-fit ​​mechanism, which is quick and convenient to install and prevents them from coming apart under external force, thus preventing interruption of optical signal transmission. A dust cap 10 can be detachably installed on the end of the inner shell 1 away from the connector 500. When the fiber optic pre-terminated adapter is not connected to the terminal equipment 400, the dust cap 10 provides reliable dust protection for the end face of the inner core 101. When the fiber optic pre-terminated adapter is connected to the terminal equipment 400, the dust cap can be removed.

[0031] A spring 6 is also fitted onto the inner core 101. A mounting cavity 706 is provided on the inner wall of the end of the stop 7 that engages with the inner shell 1. The spring 6 is located within the mounting cavity 706, with one end abutting against the bottom of the mounting cavity 706 and the other end abutting against the shoulder 301 of the inner core 101. There is a certain axial gap between the stop 7 and the shoulder 301 of the inner core 101. When the fiber optic pre-terminated adapter is installed onto the interface 401 of the multi-terminal device 400, the inner core 101 will be subjected to axial pressure from the interface 401. At this time, the inner core 101 can slide back and forth in the inner core channel under the action of the spring 6 to adapt to the mechanical stress generated during the insertion and removal process.

[0032] Furthermore, the inner core 101 includes a front insert 2, an insert fixing member 3, an optical fiber 4, and a rear insert 5. One end of the rear insert 5 is connected to the ceramic sleeve 8, and the other end is connected to the insert fixing member 3. One end of the front insert 2 is located inside the insert fixing member 3 and is connected to the rear insert 5 through the optical fiber 4, while the other end extends out of the insert fixing member 3.

[0033] Specifically, such as Figure 8As shown, the inner walls at both ends of the ferrule fixing member 3 are provided with a first plug socket 302 and a second plug socket 303. One end of the front ferrule 2 is inserted into the first plug socket 302, and one end of the rear ferrule 5 is inserted into the second plug socket 303. The other end of the front ferrule 2 is connected to the ferrule in the interface 401, and the other end of the rear ferrule 5 is inserted into the ceramic sleeve 8 and connected to the ferrule of the fiber optic connector 500 in the ceramic sleeve 8. The front ferrule 2 and the rear ferrule 5 are fixedly connected in the cavity of the ferrule fixing member 3 through the optical fiber 4 to form a path. The rear ferrule 5 should maintain coaxiality with the front ferrule 2 to ensure low-loss transmission of optical signals.

[0034] The end of the insert fixing member 3 connected to the front insert 2 is provided with a shoulder 301. The shoulder 301 is provided with four positioning grooves 304. The inner shell 1 is provided with a positioning key that cooperates with the positioning grooves 304. The shoulder 301 can prevent the insert fixing member 3 from rotating relative to the inner shell 1. The front insert 2 and the rear insert 5 will also maintain a limited connection in the inner core channel under the action of the insert fixing member 3.

[0035] Furthermore, such as Figure 9 As shown, the adapter 9 has a first snap-fit ​​part 91 and a second snap-fit ​​part 92. One end of the first snap-fit ​​part 91 and one end of the second snap-fit ​​part 92 are fixedly connected. The other end of the first snap-fit ​​part 91 is snapped into the outer wall of the stop member 7. The other end of the second snap-fit ​​part 92 includes a first snap-fit ​​member 903, a second snap-fit ​​member 904 and a fixing base 905. One end of the fixing base 905 is fixedly connected to one end of the first snap-fit ​​part 91. The first snap-fit ​​member 903 and the second snap-fit ​​member 904 are alternately installed on the other end of the fixing base 905. The first snap-fit ​​member 903 is snapped into the fiber optic connector 500 and the second snap-fit ​​member 904 is snapped into the outer protective component 200.

[0036] As a key component for stably connecting the stop 7, the fiber optic connector 500, and the outer protective assembly 200, the adapter 9 enables mating connections between different types of interfaces 401 of the terminal device 400 and the fiber optic connector 500. For example, the first snap-fit ​​portion 91 and the second snap-fit ​​portion 92 of the adapter 9 can be separate or integrally formed. The first snap-fit ​​portion 91 is limited and connected to one end of the stop 7, and the second snap-fit ​​portion 92, through the first snap-fit ​​element 903 and the second snap-fit ​​element 904 installed or extended on the fixing base 905, respectively snaps into the fiber optic connector 500 and the outer protective assembly 200, thereby achieving mating connections between different types of interfaces 401 of the terminal device 400 and the connecting assembly 100.

[0037] When the fiber optic connector 500 is inserted into the fiber optic pre-terminated adapter, the first locking member 903 is inserted into the fiber optic connector 500 and engages with the locking groove on its inner wall, ensuring stable mating between the fiber optic connector 500 and the ferrule in the connecting assembly 100 within the cavity 902 of the second locking part 92. At this time, the fiber optic connector 500 is inserted into the second locking member 904, providing outward compressive force to the second locking member 904. This compressive force causes the second locking member 904 to form a self-locking mechanism with the locking groove 1104 on the inner wall of the outer protective assembly 200, ensuring that the connecting assembly 100 will not detach from the outer protective assembly 200 when the fiber optic connector 500 is subjected to significant tensile force.

[0038] Furthermore, the second latching member 904 includes a first latching post 9041 and a second latching post 9042, which are arranged opposite to each other. A first protrusion 9043 is provided on the outer wall of the first latching post 9041, and a second protrusion 9044 is provided on the outer wall of the second latching post 9042. The first protrusion 9043 and the second protrusion 9044 are latched with corresponding latching grooves 1104 provided on the inner wall of the outer protective component 200.

[0039] Specifically, the first protrusion 9043 is block-shaped, with a beveled end away from the fiber optic connector 500. The second protrusion 9044 has the same structure as the first protrusion 9043. The snap-fit ​​groove 1104 on the inner wall of the outer protective assembly 200 corresponds to the first protrusion 9043 and the second protrusion 9044. During installation, the connecting assembly 100 is inserted into the outer protective assembly 200 in an axial pushing manner. The first protrusion 9043 and the second protrusion 9044 slide along the inner wall of the outer protective assembly 200 until they fall into the snap-fit ​​groove 1104. When it is necessary to detach the adapter 9 from the outer protective assembly 200, the connecting assembly 100 is pushed out from the outer protective assembly 200 in the opposite direction of the pushing, and the first protrusion 9043 and the second protrusion 9044 slide out of the snap-fit ​​groove 1104.

[0040] To ensure stable engagement between the first protrusion 9043 and the second protrusion 9044 and the snap-fit ​​slot 1104, the distance between the first snap-fit ​​post 9041 and the second snap-fit ​​post 9042 is adapted to the size of the fiber optic connector, and the center distance between the first snap-fit ​​post 9041 and the second snap-fit ​​post 9042 is preferably 7.4mm to 7.55mm.

[0041] Furthermore, an elastic groove 901 is provided axially on the side wall of the first snap-fit ​​part 91, and a corresponding first boss 704 is provided on the stop member 7. The elastic groove 901 and the first boss 704 engage and cooperate.

[0042] Specifically, the elastic groove 901 includes two cross-shaped grooves, each composed of an intersecting axial groove and a transverse groove. The two cross-shaped grooves are symmetrically arranged on the sidewall of the first engaging portion 91. When the first protrusion 704 enters the elastic groove 901, the elastic groove 901 expands slightly outward under the pushing force of the first protrusion 704. After the first protrusion 704 is fully engaged, the elastic groove 901 returns to its original shape, ensuring a stable engagement between the first protrusion 704 and the elastic groove 901, thus restricting their relative movement.

[0043] In some embodiments, the adapter 9 can also be inserted into the stop 7. The first boss 704 is symmetrically disposed on the inner wall of the stop 7. When the adapter 9 is inserted into the stop 7, the first boss 704 can accurately engage in the elastic slot 901 of the adapter 9.

[0044] Furthermore, a guide groove 906 is provided on the inner wall of the first snap-fit ​​part 91. The guide groove 906 is connected to the elastic snap-fit ​​groove 901, so that the first boss 704 can slide into the elastic snap-fit ​​groove 901 along the guide groove 906.

[0045] The guide groove 906 ensures that the first boss 704 of the stop 7 smoothly enters the elastic groove 901. The end of the guide groove 906 is connected to the axial groove of the cross groove through an inclined surface. When the stop 7 and the adapter 9 are engaged, the first boss 704 on the stop 7 slides along the guide groove 906 into the elastic groove 901.

[0046] Furthermore, the outer wall of the stop member 7 is provided with a limiting part 701, and a step 702 is provided on one side of the limiting part 701. The limiting part 701 and the step 702 cooperate with the inner wall of the outer protective component 200 to perform axial limiting.

[0047] The limiting part 701 and the step 702 are either separate or integrally formed. The shapes of the limiting part 701 and the step 702 match the inner wall of the outer protective component 200 to prevent the connecting component 100 from moving axially.

[0048] Furthermore, the step 702 is provided with a groove 703, which is circumferentially limited to the inner wall of the outer protective component 200.

[0049] The slot 703 is used to cooperate with the outer protective component 200 to restrict the stop 7 from rotating with the inner wall of the outer protective component 200. Therefore, there is no specific restriction on the position of the slot 703.

[0050] Furthermore, the inner wall of the outer protective component 200 is provided with a neck 1101 and a stepped hole 1103. The neck 1101 cooperates with the step 702, the stepped hole 1103 cooperates with the limiting part 701, and the neck 1101 is also provided with a limiting key 1102, which cooperates with the slot 703 to engage.

[0051] Specifically, such as Figure 7 , 10 As shown, when the outer protective component 200 is installed on the connecting component 100, rotating the connecting component 100 aligns the slot 703 with the limiting key 1102 on the neck 1101, allowing the step 702 to match the neck 1101. Simultaneously, the limiting part 701 enters the step hole 1103, thus achieving the installation of the outer protective component 200 and the connecting component 100. Through the dual cooperation of the neck 1101 and the step 702, the step hole 1103 and the limiting part 701, and the circumferential anti-rotation design of the keyway, the connecting component 100 and the outer protective component 200 maintain a stable connection under vibration or torque loads.

[0052] Since the connecting components 100 are identical, the connection structure of the inner wall of each outer protective component 200 that mates with the connecting component 100 is also identical, namely, the design of the neck 1101, the limit key 1102, the stepped hole 1103, and the snap-fit ​​groove 1104 are the same. Therefore, through the double snap-fit ​​between the outer protective component 200 and the stop 7 and the adapter 9 in the connecting component 100, accurate positioning between the connecting component 100 and the outer protective component 200 is ensured, and relative rotation between the two is effectively prevented, giving the entire connection structure good reliability and durability.

[0053] In this application, as Figure 1 As shown, three embodiments of the external protective components 200 are given, but are not limited to these embodiments, and the first dust cover 15, the second dust cover 25 and the third dust cover 35 are used to represent different types of interfaces 401 of various terminal devices 400.

[0054] In some embodiments, such as Figure 3 As shown, the outer protective component 200 includes a first protective shell 11 and a first fixing member 12. The first fixing member 12 is fitted onto the first protective shell 11, and a second sealing ring 14 is provided between the first protective shell 11 and the first fixing member 12. Two snap-fit ​​keys are symmetrically provided on the inner wall of one end of the first fixing member 12, and two L-shaped slots are symmetrically provided on the outer side of the first dust cover 15. Rotating the first fixing member 12 causes the snap-fit ​​keys to slide along the L-shaped slots, thereby locking the adapter end of the outer protective component 200 with the first dust cover 15. The other end of the first fixing member 12 is provided with an external thread for engaging with the first internal thread 1604 of the waterproof component 300. To improve the sealing performance of the connection between the first fixing member 12 and the waterproof component 300, a first sealing ring 13 is provided between the first fixing member 12 and the waterproof component 300 to ensure a sealed connection between the first fixing member 12 and the waterproof component 300.

[0055] In some embodiments, such as Figure 11As shown, the outer protective component 200 includes a second protective shell 21 and a second fixing member 22. The second fixing member 22 is fitted onto the second protective shell 21. One end of the second protective shell 21 abuts against the inner wall of the second dust cover 25. A fourth sealing ring 24 is provided between the second protective shell 21 and the second dust cover 25. Both ends of the second fixing member 22 are provided with external threads. One end is used to engage with the internal thread on the inner wall of the second dust cover 25, and the other end engages with the first internal thread 1604 of the waterproof component 300. A third sealing ring 23 is provided between the waterproof component 300 and the second fixing member 22.

[0056] In some embodiments, such as Figure 12 As shown, the outer protective assembly 200 includes a third protective shell 31 and a third fixing member 32. The third fixing member 32 is fixedly sleeved on the third protective shell 31. The outer wall of the third dust cover 35 is provided with a sealing groove, and a sixth sealing ring 34 is placed in the sealing groove. The sixth sealing ring 34 is located between the third dust cover 35 and the third protective shell 31. The outer wall of the third dust cover 35 is also provided with an elastic clip 36. One end of the third protective shell 31 is provided with a T-shaped slot, and the inner wall of the third fixing member 32 is provided with a limiting groove. The end of the elastic clip 36 passes through the opening of the T-shaped slot and engages with the limiting groove, thereby achieving the limiting and locking of the third dust cover 35 and the outer protective assembly 200. The other end of the third protective shell 31 is provided with an external thread for engaging with the first internal thread 1604 of the waterproof assembly 300. A fifth sealing ring 33 is provided between the third protective shell 31 and the waterproof assembly 300.

[0057] The waterproof assembly 300 includes a coaxially arranged waterproof locking head 16, a resilient sealing gasket 17, and a locking nut 18, such as... Figure 13 , 14 As shown, one end of the waterproof lock head 16 is provided with a skirt 1601. The inner wall of the base of the skirt 1601 is provided with a platform 1602 for placing the elastic sealing gasket 17. The outer wall of the base of the skirt 1601 is provided with a first external thread 1603. The other end of the waterproof lock head 16 is provided with a first internal thread 1604. The first internal thread 1604 engages with the external thread on the outer protective component 200. The side of the first internal thread 1604 near the outer protective component 200 is also provided with a sealing surface 1605. The sealing surface 1605 cooperates with the first sealing ring 13 / third sealing ring 23 / fifth sealing ring 33. One end of the locking nut 18 is provided with a second internal thread 1801, which is used to engage with the first external thread 1603 on the waterproof lock head 16. The bottom of the locking nut 18 is provided with an arc surface 1802, which is used to cooperate with the skirt 1601 on the waterproof lock head 16.

[0058] When the locking nut 18 is tightened and engaged with the waterproof lock head 16, the skirt 1601 of the waterproof lock head 16 compresses the elastic sealing gasket 17, causing it to deform radially. This compresses the elastic sealing gasket 17 to form a reliable sealing interface. The first external thread 1603 of the waterproof lock head 16 engages with the second internal thread 1801 of the locking nut 18, achieving axial fastening between the two. When the first internal thread 1604 of the waterproof lock head 16 engages with the external thread on the outer protective component 200, the sealing surface 1605 of the waterproof lock head 16 forms an auxiliary sealing engagement with the first sealing ring 13 / third sealing ring 23 / fifth sealing ring 33. This dual sealing achieves an adjustable and highly reliable sealing effect between the outer protective component 200 and the waterproof component 300.

[0059] The working principle of this application is as follows: When using a fiber optic pre-terminated adapter to convert different interfaces into a unified interface, firstly, the outer protective component 200 is used to mate and lock the connecting component 100 with the interface 401 of different types. Then, the elastic sealing gasket 17 is cut along the longitudinal direction with a utility knife, and the locking nut 18, elastic sealing gasket 17 and waterproof lock head 16 are sequentially placed on the optical cable of the fiber optic connector 500. The fiber optic connector 500 is then inserted into the adapter 9 inside the outer protective component 200. Finally, the waterproof lock head 16, elastic sealing gasket 17 and locking nut 18 are installed sequentially to complete the installation.

[0060] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the embodiments above is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A fiber optic pre-terminated adapter, characterized in that, include: Multiple external protection components (200), each of the external protection components (200) includes a connection end (201) and an adapter end (202), each of the adapter ends (202) being used to match different types of interfaces (401) of the corresponding terminal device (400); The outer protective component (200) has a receiving cavity, in which a connecting component (100) is provided. One end of the connecting component (100) is detachably connected to the fiber optic connector (500), and the other end of the connecting component (100) is connected to the ferrule of the different interface (401). The connecting end (201) of the outer protective component (200) is provided with a waterproof component (300), which is sleeved on the fiber optic connector (500).

2. The fiber optic pre-terminated adapter according to claim 1, characterized in that, The connecting assembly (100) includes an inner shell (1), an inner core (101), a stop (7), a ceramic sleeve (8), and an adapter (9). The stop (7) is located between the inner shell (1) and the adapter (9). One end of the stop (7) is engaged with the inner shell (1), and the other end is engaged with the adapter (9). The inner walls of the inner shell (1), the stop (7), and the adapter (9) form an inner core channel. The inner core (101) slides within the inner core channel. The ceramic sleeve (8) is located within the adapter (9). One end of the inner core (101) near the adapter (9) is inserted into the ceramic sleeve (8), and the other end is located within the inner shell (1).

3. The fiber optic pre-terminated adapter according to claim 2, characterized in that, The inner core (101) includes a front ferrule (2), a ferrule fixing member (3), an optical fiber (4), and a rear ferrule (5). One end of the rear ferrule (5) is connected to the ceramic sleeve (8), and the other end is connected to the ferrule fixing member (3). One end of the front ferrule (2) is located inside the ferrule fixing member (3) and is connected to the rear ferrule (5) through the optical fiber (4), while the other end extends out of the ferrule fixing member (3).

4. The fiber optic pre-terminated adapter according to claim 2, characterized in that, The adapter (9) has a first snap-fit ​​part (91) and a second snap-fit ​​part (92). One end of the first snap-fit ​​part (91) and one end of the second snap-fit ​​part (92) are fixedly connected. The other end of the first snap-fit ​​part (91) is snapped into the outer wall of the stop (7). The other end of the second snap-fit ​​part (92) includes a first snap-fit ​​member (903), a second snap-fit ​​member (904) and a fixing seat (905). One end of the fixing seat (905) is fixedly connected to one end of the first snap-fit ​​part (91). The first snap-fit ​​member (903) and the second snap-fit ​​member (904) are alternately installed on the other end of the fixing seat (905). The first snap-fit ​​member (903) is snapped into the optical fiber connector (500), and the second snap-fit ​​member (904) is snapped into the outer protective component (200).

5. The fiber optic pre-terminated adapter according to claim 4, characterized in that, The second snap-fit ​​component (904) includes a first snap-fit ​​post (9041) and a second snap-fit ​​post (9042). The first snap-fit ​​post (9041) and the second snap-fit ​​post (9042) are arranged opposite to each other. A first protrusion (9043) is provided on the outer wall of the first snap-fit ​​post (9041), and a second protrusion (9044) is provided on the outer wall of the second snap-fit ​​post (9042). The first protrusion (9043) and the second protrusion (9044) are snapped into the snap-fit ​​groove (1104) correspondingly provided on the inner wall of the outer protective component (200).

6. The fiber optic pre-terminated adapter according to claim 4, characterized in that, The first snap-fit ​​part (91) has an elastic snap-fit ​​groove (901) on its side wall along the axial direction, and the stop (7) has a corresponding first boss (704) on it. The elastic snap-fit ​​groove (901) and the first boss (704) snap-fit ​​into each other.

7. The fiber optic pre-terminated adapter according to claim 6, characterized in that, The inner wall of the first snap-fit ​​part (91) is provided with a guide groove (906) along the axial direction. The guide groove (906) is connected to the elastic snap-fit ​​groove (901) so that the first boss (704) can be snapped into the elastic snap-fit ​​groove (901) along the guide groove (906).

8. The fiber optic pre-terminated adapter according to claim 7, characterized in that, The outer wall of the stop (7) is provided with a limiting part (701), and a step (702) is provided on one side of the limiting part (701). The limiting part (701) and the step (702) cooperate with the inner wall of the outer protective component (200) to perform axial limiting.

9. The fiber optic pre-terminated adapter according to claim 8, characterized in that, The step (702) is provided with a slot (703), and the slot (703) is circumferentially limited to the inner wall of the outer protective component (200).

10. The fiber optic pre-terminated adapter according to claim 9, characterized in that, The inner wall of the outer protective component (200) is provided with a neck (1101) and a stepped hole (1103). The neck (1101) cooperates with the step (702), and the stepped hole (1103) cooperates with the limiting part (701). The neck (1101) is also provided with a limiting key (1102), and the limiting key (1102) cooperates with the slot (703) to engage.

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