Fiber optic connector plugs, fiber optic adapters, connector assemblies and communication equipment

Abstract

The present application provides a fiber optic connector plug, a fiber optic adapter, a connector assembly, and a communication device. The fiber optic connector plug includes a ferrule fixed to the optical fiber, a main housing surrounding the optical fiber, and a front frame sleeve. The front frame sleeve is fixed to the main housing and surrounds the ferrule. The front end face of the ferrule is flush with the front end face of the front frame sleeve, or the front end face of the ferrule is located between the front end face and the rear end face of the front frame sleeve in the axial direction. A slot is formed between the front frame sleeve and the ferrule. The slot is used to accommodate the end face of the ferrule sleeve of the fiber optic adapter, and the ferrule is used to be inserted into the ferrule sleeve. The provision of the front frame sleeve in the present application facilitates the miniaturization of the fiber optic connector plug, allowing more fiber optic connection ports to be arranged within a limited space.

Description

Technical Field

[0001] The present application relates to the field of optical communications, and in particular to a fiber optic connector plug, a fiber optic adapter, a connector assembly, and communication equipment. Background Art

[0002] With the advancement of communication technology, fiber optic transmission is increasingly being used in communication systems. In fiber-to-the-home (FTTH) networks, at the point of delivery, the optical fiber from the equipment room is connected to the incoming fiber within a fiber optic cassette, extending the optical network to every household. With increasing urban population density, the number of ports on each fiber optic cassette has increased. The industry is currently developing solutions to maximize the number of fiber optic connection ports within limited space. Furthermore, the industry is also developing solutions to simplify the structure of fiber optic connectors and achieve miniaturization. Summary of the Invention

[0003] The embodiments of the present application provide a fiber optic connector plug, a fiber optic adapter, a connector assembly, and a communication device, which can realize a miniaturized design of the fiber optic connector plug and can arrange more fiber optic connection ports in a limited space.

[0004] In a first aspect, the present application provides an optical fiber connector plug, comprising an optical fiber, a ferrule fixed to the front end of the optical fiber, a main shell and a front frame sleeve sleeved around the outer periphery of the optical fiber, the main shell being in the shape of a sleeve, the front frame sleeve being fixed to one end of the main shell and surrounding the ferrule, the end face of the ferrule away from the optical fiber being the front end face of the ferrule, the end face of the front frame sleeve away from the main shell being the front end face of the front frame sleeve; the front end face of the ferrule is flush with the front end face of the front frame sleeve, which can be understood as the front end face of the ferrule and the front end face of the front frame sleeve being aligned in the radial direction, or the front end face of the ferrule is located at A slot is formed between the front end face of the front frame housing and the rear end face of the front frame housing, the rear end face of the front frame housing being the end face of the front frame housing facing the main housing. The slot is used to accommodate the ferrule sleeve of the optical fiber adapter, with the end face of the ferrule sleeve positioned within the slot. It can be understood that the front end of the ferrule sleeve is inserted into the slot, and the radial dimensions of the ferrule sleeve match the radial dimensions of the slot. That is, the radial dimensions of the ferrule sleeve and the slot can be equal, or the difference between them is to meet processing tolerances and assembly clearances. In other words, the slot does not accommodate any other components except the ferrule. The ferrule is used to be inserted into the ferrule sleeve.

[0005] The present application protects the front face of the ferrule by the front face of the front frame sleeve, which can prevent the front face of the ferrule from being scratched. Specifically, the front frame sleeve can protect the front face of the ferrule during turnover, transportation, and plugging and unplugging with the optical fiber adapter. When it is subsequently docked with the ferrule of the opposite connector plug, it ensures that the optical signal can be stably and reliably transmitted between the two. A slot is formed between the inner side of the front frame sleeve and the ferrule to cooperate with the ferrule sleeve of the optical fiber adapter. Specifically, the slot is used to accommodate one end of the ferrule sleeve, and the end face of the ferrule sleeve extends into the slot. In this way, the front frame sleeve has the functions of protecting the front face of the ferrule and cooperating with the optical fiber adapter. There is no need to set other components on the periphery of the front frame sleeve. This can make the radial size of the optical fiber connector plug sufficiently small, so that more optical fiber connection ports can be arranged within the limited space of the communication equipment.

[0006] For the optical fiber connector plug, the outer surface of the front frame is also the outer surface of the entire optical fiber connector plug, that is, there is only one front frame structure around the ferrule. The present application concentrates the protective features (the front end surface of the front frame) and the plug-in and pull-out mating features (the slot formed between the inner surface of the front frame and the ferrule, and the contact and mating between the outer surface of the front frame and the inner surface of the optical fiber adapter) arranged around the ferrule on the front frame. This not only reduces the number of parts and simplifies the structure of the optical fiber connector plug, but also facilitates the miniaturization of the radial dimension.

[0007] In one possible implementation, the outer surface of the front frame is provided with a first guide structure, which is configured to engage with a guide key on the fiber optic adapter. The outer surface of the front frame provided herein contacts and engages with the inner surface of the fiber optic adapter. The cooperation between the first guide structure and the guide key provides guidance during insertion of the fiber optic connector plug into the fiber optic adapter.

[0008] In one possible implementation, the first guide structure extends along the axial direction. The optical fiber connector plug having the first guide structure extending in the axial direction can be inserted into or removed from the optical fiber adapter in a straight-in and straight-out manner, and the insertion process does not involve rotational action. Such a design is conducive to reducing the operating space around the optical fiber connector plug. When multiple optical fiber connector plugs are arranged side by side on the communication equipment, there is no need to reserve operating space between adjacent optical fiber connector plugs, because the straight-in and straight-out operation method only requires axial space.

[0009] In one possible implementation, in the radial direction, the first guide structure is a groove structure provided on the outer surface of the front frame housing, i.e., the first guide structure does not extend through the inner surface of the front frame housing. A notch may be provided near the front end face of the front frame housing. The notch allows the front end face to form a non-closed annular shape or at least a two-segmented structure (for example, when there are two notches, the front end face is divided into a first surface and a second surface). In this embodiment, the first guide structure, which is a groove structure provided on the outer surface of the front frame housing, has an opening toward the front end face, and this opening communicates with the notch. The first guide structure and the notch provide a clear reminder of the correct alignment of the optical fiber connector plug during insertion.

[0010] In a possible implementation, the first guide structure passes through the inner surface and the outer surface of the front frame cover. It can be understood that the first guide structure is a cutout or a hollow structure provided on the front frame cover.

[0011] In a possible implementation, the first guide structure is protrudingly provided on an outer surface of the front frame cover.

[0012] In one possible implementation, the first guide structure may extend from the front end face of the front frame cover to the rear end face of the front frame cover, or may extend from the front end face of the front frame cover to a middle position of the front frame cover. The middle position refers to a position between the front end face and the rear end face, and does not only represent the center position of the front end face and the rear end face, but may be a position close to the front end face or a position close to the rear end face.

[0013] In a possible implementation, the number of the first guide structures may be one, two, or more. The two or more first guide structures may be evenly spaced in the circumferential direction and arranged on the outer surface of the front frame.

[0014] In one possible implementation, a second guide structure is provided on the outer surface of the main housing. The second guide structure is mated with the first guide structure and is used to mate with a guide key on the optical fiber adapter. The first guide structure and the second guide structure can be identical, for example, both being groove structures, cutout structures, or protrusion structures. The second guide structure and the second guide structure can be different, for example, the first guide structure being a groove structure and the second guide structure being a cutout structure, or the first guide structure being a cutout structure and the second guide structure being a protrusion structure.

[0015] A first guide structure (or a first guide structure combined with a second guide structure) is provided, so that during the process of docking the optical fiber connector plug with the optical fiber adapter, the front frame sleeve can have a striking reminder and guiding function, thereby facilitating the alignment of the optical fiber connector plug with the optical fiber adapter, improving the accuracy of plugging and docking, and preventing the core component of the optical fiber connector plug from being damaged or failing due to multiple collisions due to incorrect insertion of the optical fiber connector plug, thereby effectively increasing the service life of the optical fiber connector plug.

[0016] In a possible implementation, the front end surface of the front frame sleeve is a closed annular structure.

[0017] In one possible implementation, a notch is provided at one end of the front housing near the front end of the front housing, so that the front end of the front housing forms an unenclosed, continuously extended surface. The notch allows the front end of the optical fiber connector plug to present a concave-convex configuration suitable for insertion. This allows the optical fiber connector plug to better adapt to the internal space of the optical fiber adapter when plugged into the optical fiber adapter, compared to a flat front end of the optical fiber connector plug. This prevents loose connections caused by the limited internal space of the optical fiber adapter, improves the stability and reliability of the insertion, and is highly practical and applicable to a wide range of applications.

[0018] In one possible implementation, two notches are disposed opposite each other at one end of the front end face of the front housing, such that the front end face of the front housing is formed between the two notches. In this embodiment, the front end face includes a first surface and a second surface, symmetrically disposed on either side of the central axis of the front housing. Specifically, when the first surface and the second surface are connected to form a complete circular ring, each of the first surface and the second surface is less than or equal to one-quarter of the circular ring. This allows the two notches to be positioned to accommodate a portion of the sidewall of the front end face of the other optical fiber connector plug. It will be appreciated that when identical optical fiber connector plugs are inserted into the same optical fiber adapter, the front end face of the front housing protrudes beyond the front end face of the ferrule, requiring the front ends of the two ferrules to mate, necessitating an interference fit between the two front housings. The two notches are designed to address this interference fit, and are positioned to accommodate a portion of the front end face of the other front housing. Specifically, the two notches can be symmetrically arranged on both sides of the central axis of the front frame sleeve. The symmetrical arrangement allows the force on the outer sleeve to be more uniform and balanced when plugged in. The overall strength of the outer frame sleeve is high, which can minimize the possibility of connection failure due to unbalanced force.

[0019] The present invention provides a notch at the front end of the front frame, which also has the advantage of facilitating observation. A worker can at least see the front end of the ferrule when looking directly at the outer surface of the outer frame with the notch. Therefore, when connecting the fiber optic connector and the fiber optic adapter, the worker can see the position of the ferrule, facilitating insertion and improving the success rate of insertion. It also prevents the ferrule from being repeatedly bumped due to misinsertion, thereby avoiding damage to the ferrule.

[0020] In one possible implementation, a first limiting structure is provided on the surface of the ferrule, and a second limiting structure is provided on the inner surface of the front frame. The first limiting structure and the second limiting structure cooperate to prevent relative rotation between the ferrule and the front frame.

[0021] In one possible implementation, the first limiting structure includes a first plane, the second limiting structure protrudes from the inner surface of the front frame, and the second limiting structure includes a second plane facing the ferrule, with the first plane and the second plane in contact. The limiting structures provided in this application, namely the first limiting structure and the second limiting structure, are provided between the front frame and the ferrule. This structure can be understood as direct contact between the outer surface of the ferrule and the inner surface of the front frame. This allows for a more compact structure between the ferrule and the front frame, facilitating a miniaturized design.

[0022] In one possible implementation, the main housing includes a main shaft and a mounting member, both of which are in the shape of a sleeve. The mounting member is connected to one end of the main shaft facing the front frame sleeve. A first stop structure is provided on the outer surface of the ferrule. The mounting member includes a mounting member body and a second stop structure. The second stop structure is located at the front end of the mounting member body and protrudes from the inner surface of the mounting member body. Part of the ferrule is accommodated inside the mounting member, and the first stop structure cooperates with the second stop structure to prevent the ferrule from moving out of the mounting member from the front end of the mounting member body. The front frame sleeve is sleeved on the outer surface of the mounting member and fixedly connected to the mounting member. The present application realizes the assembly between the ferrule and the main shaft through the mounting member, determines the specific position of the ferrule on the main shaft, and the front frame sleeve is directly sleeved on the periphery of the mounting member, that is, the inside of the mounting member is used to install the ferrule, the outside of the mounting member is used to install the front frame sleeve, and the rear end of the mounting member is used to connect to the main shaft. The present application realizes multi-dimensional assembly and connection relationships through a mounting member structure, which simplifies the structure of the optical fiber connector plug and makes it easy to achieve a small-size design.

[0023] In a possible implementation, the first limiting structure and the first stopping structure of the ferrule are adjacent in the axial direction, and the first stopping structure includes a first limiting surface facing the front end of the ferrule, and the first limiting surface is vertically connected to the first plane of the first limiting structure.

[0024] In one possible implementation, the mounting body is sleeve-shaped and includes a central axis, the second stop structure protrudes from the inner surface of the mounting body, the second stop structure includes a second limiting surface and a contact surface, the second limiting surface faces the rear end of the mounting body, and the contact surface faces the central axis of the mounting body. The second limiting surface is used to cooperate with the first limiting surface of the first stop structure on the plug, and the contact surface is used to cooperate with the first plane of the first limiting structure of the plug. In one possible implementation, there are two second stop structures, which are relatively arranged on both sides of the central axis of the mounting body, the axial dimension of one of the second stop structures is smaller than the axial dimension of the other second stop structure, and a mounting notch is formed on the side of one of the second stop structures away from the mounting body, the position of this mounting notch is opposite to the partial contact surface of the other second stop structure, and this mounting notch is used to accommodate the second limiting structure of the front frame sleeve.

[0025] In one possible implementation, the mounting member further includes an elastic hook formed at the front end of the mounting member body. The front frame housing is provided with a slot or a hole, and the elastic hook engages with the slot or hole to securely connect the mounting member to the front frame housing. This secure connection between the elastic hook and the hole allows for a removable connection between the mounting member and the front frame housing, facilitating assembly and disassembly. Furthermore, the elastic hook engages within the hole, occupying only the internal space of the front frame housing and not increasing the radial dimensions of the optical fiber connector plug. This embodiment facilitates positioning of the first guide structure of the front frame housing by directly inserting the front frame housing axially around the periphery of the mounting member. This is particularly important when the first guide structure needs to mate with a second guide structure on the main shaft, ensuring circumferential alignment between the front frame housing and the main shaft.

[0026] In one possible implementation, the rear end of the front frame sleeve is a fully enclosed cylindrical structure, that is, the rear end of the front frame sleeve is a circumferentially closed structure. On the one hand, it can improve the structural strength of the front frame sleeve, and on the other hand, it can also improve the connection strength between the front frame sleeve and the main shaft. In addition, as the appearance part of the optical fiber connector plug, the circumferentially fully enclosed structure of the front frame sleeve can bring appearance integrity and enhance user experience.

[0027] In one possible implementation, the rear end face of the mounting body and the rear end face of the front frame sleeve are coplanar and together form a docking surface, which is in contact with the end face of the main shaft. The present application utilizes a structural design in which the docking surface is in contact with the end face of the main shaft, so that the connection between the front frame sleeve and the main shaft only occupies the space on the end face of the main shaft and does not extend to the outer surface of the main shaft. The docking surface can be planar, and accordingly, the end face of the main shaft is also planar. In other embodiments, the docking surface can also be an arcuate surface, and correspondingly, the end face of the main shaft is an arcuate surface that mates with the docking surface. For example, the docking surface is an outwardly convex arcuate surface, and the end face of the main shaft is an inwardly concave arcuate surface.

[0028] In one possible implementation, the outer surface of the front frame sleeve of the present application can be coplanar with the outer surface of the main shaft, or be smoothly connected. For example, the outer surface of the front frame sleeve is a cylindrical surface, and the outer surface of the main shaft is also a cylindrical surface. When the front frame sleeve is docked to the end surface of the main shaft, these two cylindrical outer surfaces with the same radial dimensions are docked to form a complete cylindrical outer surface.

[0029] In a possible implementation, a positioning structure is provided at the joint between the docking surface and the front end face of the main shaft, and the positioning structure is used to: position the main housing and the front frame sleeve in the circumferential direction, and / or position the main housing and the mounting member in the circumferential direction.

[0030] In one possible implementation, a first notch is provided on the rear end face of the front frame, and a second notch is provided on the rear end face of the mounting body. The first and second notches are radially opposed. A protrusion is provided on the end face of the spindle, which engages with the first and second notches. A positioning structure between the spindle, the front frame, and the mounting surface is located at the joint. Positioning is achieved through the cooperation of the first and second notches and the protrusion on the spindle. This does not increase the radial size of the fiber optic connector plug, facilitating a compact design.

[0031] The number of first cutouts on the rear end surface of the front frame can be one, two, or more. When there are two first cutouts, they can be symmetrically distributed on either side of the central axis of the front frame. When there are multiple first cutouts, they can be spaced apart circumferentially. Similarly, the number of second cutouts can be one, two, or more, and can have the same arrangement as the first cutouts.

[0032] In one possible implementation, the mounting member is connected to the main shaft through a fixing member, part of the fixing member is located inside the main shaft, and the other part is located inside the mounting member, that is, the fixing member is completely surrounded, and the main shaft and the mounting member are connected at the periphery of the fixing member.

[0033] In one possible implementation, the mounting member is connected to the main shaft via a fixing member, and the fixing member can also be partially exposed to form the appearance surface of the optical fiber connector plug. The fixing member is a sleeve-shaped structure, including a front end, a rear end, and a middle portion connected between the front end and the rear end. The front end of the fixing member extends into the inner side of the mounting member and is fixedly connected to the mounting member, and the rear end of the fixing member extends into the inner side of the main shaft and is fixedly connected to the main shaft. The middle portion is located between the front end of the main shaft and the rear end of the mounting member. It can also be understood that the middle portion is located between the front end of the main shaft and the rear end of the front frame sleeve, and the outer surface of the middle portion forms the appearance surface of the optical fiber connector plug.

[0034] In one possible implementation, the front end of the fixing member is detachably connected to the mounting member by means of a buckle that cooperates with a hole. The buckle is provided on the periphery of the front end, and the mounting member has a hole extending through the inner and outer surfaces. The buckle at the front end is received within the hole of the mounting member. The rear end is also detachably connected to the main shaft by means of a buckle that cooperates with a hole. The buckle is provided on the periphery of the rear end, and the main shaft has a hole extending through the inner and outer surfaces. The buckle at the rear end is received within the hole of the main shaft.

[0035] In other possible implementations, the front end of the fixing member and the mounting member may be fixed by a threaded connection, and similarly, the rear end of the fixing member and the main shaft may be fixed by a threaded connection.

[0036] In one possible implementation, a sealing groove is provided on the periphery of the middle part of the fixing member for accommodating the sealing member. Of course, under the architecture of this embodiment, a sealing groove may not be provided on the periphery of the middle part, but the sealing groove may be provided on the outer surface of the main shaft. When the optical fiber connector plug is plugged into the optical fiber adapter, the middle part is located inside the optical fiber adapter, and the front end of the main shaft also extends into the optical fiber adapter.

[0037] In a possible implementation, a sealing structure is provided between the rear end of the fixing member and the main shaft.

[0038] In one possible implementation, a guide structure may also be provided around the periphery of the central portion of the fixing member. This guide structure is connected to or extends continuously from the first guide structure on the front frame, and together they engage with a guide key in the fiber optic adapter. In other embodiments, guide structures are provided around both the periphery of the central portion and the periphery of the main shaft. Both guide structures are arranged along the extension path of the first guide structure on the front frame, and together with the first guide structure on the front frame, they form a guide structure for the fiber optic connector plug.

[0039] In one possible implementation, a sealing structure and a first locking structure are provided on the outer surface of the main shell. Along the axial direction, the sealing structure is located between the front frame sleeve and the first locking structure. The first locking structure is used to cooperate with the second locking structure of the optical fiber adapter, and the sealing structure is used for sealing the inner surface of the optical fiber adapter.

[0040] The fiber optic connector plug provided in this embodiment is for outdoor use and requires sealing. By disposing a sealing structure between the front frame and the first locking structure, and inserting the sealing structure into the fiber optic adapter along with the front frame, a seal is formed within the fiber optic adapter. This sealing structure arrangement allows a sealed connection between the fiber optic connector plug and the fiber optic adapter to be achieved using only this single sealing structure. Specifically, the main housing includes a main shaft, which is an integrated sleeve-like structure. The front end of the main shaft also extends into the fiber optic adapter. The sealing structure is disposed on the main shaft near the front end of the main shaft. The rear end of the main shaft is sealed by a heat shrink tubing between the main shaft and the optical fiber.

[0041] In one possible implementation, the present application realizes a direct plug-in and direct pull-out optical fiber connector plug insertion path through a first locking structure provided on the outer surface of the main housing, which is beneficial for saving operating space. Specifically, the first locking structure includes a sliding member and a locking portion, the locking portion being fixed to the outer surface of the main housing, the sliding member slidingly connected to the main housing between a first position and a second position; along the axial direction of the main housing, the locking portion is located between the sliding member and the ferrule; when the sliding member is in the first position, the sliding member and the locking portion cooperate to lock the second locking structure; when the sliding member is in the second position, the locking portion and the second locking structure are unlocked.

[0042] The present application locks the second locking structure on the optical fiber adapter through the cooperation of the sliding member and the locking part. The sliding member slides along the axial direction to achieve locking and unlocking, that is, the user only needs to drive the sliding member to move in the axial direction. For the optical fiber connector plug, during the process of inserting or removing the optical fiber adapter, the operation space is also in the peripheral space on the side corresponding to the optical fiber connector plug, such as the space above the optical fiber connector plug. It is only necessary to drive the sliding member to slide on the main shell.

[0043] The present application does not require reserving operating space on the circumferential periphery of the optical fiber connector plug (the space surrounding the periphery of the main shell of the optical fiber connector plug). Therefore, the present application not only realizes the miniaturized design of the optical fiber connector plug, but also can configure more optical fiber connector plugs in communication equipment with multiple optical fiber interfaces. The arrangement between the optical fiber connector plugs can be relatively dense. Even if there is no space between adjacent optical fiber connector plugs, it will not affect the insertion, removal, locking and unlocking of a single optical fiber connector plug.

[0044] In one possible implementation, the locking portion is a fixed block protruding from the outer surface of the shell body, the locking portion and the shell body are integrally formed, and the number of locking portions can be one or two. When there are two locking portions, they are symmetrically distributed on both sides of the shell body.

[0045] The locking portion is used to cooperate with the card slot of the second locking structure, and a locking slot is formed between the sliding member and the main shell. The locking slot is used to cooperate with the elastic arm of the second locking structure. The opening position of the locking slot is located between one end of the sliding member and the main shell. The sliding member includes a mating surface formed on the inner wall of the locking slot, and the mating surface faces the main shell. The mating surface includes a first area and a second area. The first area is located between the second area and the opening of the locking slot. The vertical distance between the first area and the main shell is greater than the vertical distance between the second area and the main shell.

[0046] This embodiment sets the vertical distances between the first area and the second area and the main shell in different ways, and designs the mating surface to be a double-step structure or a structure extending obliquely relative to the axial direction. When the mating surface is in cooperation with the second locking portion, the mating surface presses the elastic arm of the second locking structure into the locking groove. Both the first area and the second area produce a pressing force on the elastic arm, and the first area and the second area form a double-step or obliquely extended structure in the radial direction, which not only helps to increase the contact area between the mating surface and the elastic arm, but also realizes the effect of radially pressing the elastic arm. The snapping and pressing force on the elastic arm can ensure that the elastic arm is firmly locked in the locking groove and is not easily pulled out.

[0047] The axial extension dimension of the mating surface is the first dimension, and the axial extension dimension of the first area is the second dimension. Obviously, the second dimension is smaller than the first dimension, and the second dimension can even be smaller than half of the first dimension. In the locked state, the area where the mating surface and the elastic arm press against each other can be the area where the entire mating surface is located. In the unlocking process, it is only necessary to move the first area to the position where the second area is located in the locked state, and the second area is synchronously moved to the outside of the elastic arm. At this time, the first area and the second area are both separated from the elastic arm, and the elastic arm is not pressed, and unlocking is achieved. It can be seen that during the unlocking process, the sliding part only needs to move a distance of the second dimension, and does not need to move a distance of the first dimension. Therefore, this embodiment has the advantages of stable locking and easy unlocking.

[0048] In one possible implementation, when the slider is in the first position, the first region is disposed opposite the locking portion, and the second region is disposed opposite the outer surface of the main housing. When the slider is in the second position, the mating surface is disposed opposite the outer surface of the main housing. By defining the corresponding positional relationship between the slider and the main housing in the first and second positions, the present application can ensure the precise positioning of the slider on the main housing, thereby improving the efficiency of locking and unlocking.

[0049] In a possible implementation, the mating surface is stepped, and an extension direction of the first region from the front end surface toward the rear end surface on the sliding member is parallel to a central axis of the sliding member.

[0050] In a possible implementation, the mating surface is in the shape of an inclined surface, and an extension direction of the first region from the front end surface toward the rear end surface on the sliding member forms an angle with a central axis of the sliding member.

[0051] In a possible implementation, the first region is provided with an etched structure, or the second region is provided with an etched structure, or both the first region and the second region are provided with an etched structure.

[0052] In a possible implementation, the mating surface is provided with a groove, and the groove is used to cooperate with the protrusion on the elastic arm. The groove can be provided in the first area or the second area.

[0053] The etched structure and the groove structure on the mating surface are both conducive to improving the locking force.

[0054] In one possible implementation, the sliding member includes a first plate, a second plate, a third plate, and a fourth plate connected in sequence, the first plate and the third plate are arranged opposite to each other, and the second plate and the fourth plate are arranged opposite to each other. The mating surface is arranged on the inner surface of the first plate and the third plate. In this embodiment, the first plate and the third plate are in an outwardly convex arc-shaped structure, and the outer surfaces of the first plate and the third plate are provided with an anti-slip structure. The second plate and the fourth plate are in a flat plate-shaped structure, the second plate and the fourth plate are arranged parallel to each other, and the distance between the second plate and the fourth plate is less than the maximum distance between the first plate and the third plate. When the sliding member is operated, external force acts on the first plate and the third plate, and one side of the second plate and the fourth plate can be used to abut other optical fiber connector plugs, thereby realizing a dense arrangement of multiple optical fiber connector plugs and saving space.

[0055] In one possible implementation, the second plate and the fourth plate can be in direct contact with the outer surface of the main shaft or connected through a guide structure, and a gap will be formed between the first plate and the third plate and the main shaft. This gap can be a locking groove for accommodating the second locking structure of the optical fiber adapter or a receiving space for accommodating the second elastic element and the fixing seat.

[0056] In a possible implementation, the inner surface of the sliding member is further provided with a second sliding guide structure, which is used to cooperate with the first sliding guide structure on the main shaft. The second sliding guide structure is located on the inner surfaces of the second plate and the fourth plate.

[0057] In one possible implementation, the second sliding guide structure includes a second guide portion and a second limiting portion, the second limiting portion is located on the side of the second guide portion away from the front end face of the sliding member, the second guide portion is used to cooperate with the first guide portion on the outer surface of the main shaft, the second limiting portion is used to cooperate with the first limiting portion on the outer surface of the main shaft, and the second limiting portion forms a second limiting step on the side facing the front end face of the sliding member, and the second limiting step is used to cooperate with the first limiting step of the first limiting portion on the main shaft to define the boundary position of the sliding member sliding toward the front end of the main shaft.

[0058] In one possible implementation, the second limiting portion and the second guide portion form a T-shaped structure. In this embodiment, the second limiting portion and the second guide portion are guide groove structures recessed on the inner surface of the sliding member. In other embodiments, the second limiting portion and the second guide portion may also be guide rail structures protruding from the inner surface of the sliding member.

[0059] In a possible implementation, the inner surface of the sliding member is provided with a stepped positioning surface facing the rear end surface of the sliding member, for positioning the second elastic member.

[0060] In one possible implementation, the optical fiber connector plug provided in this embodiment further includes a dust cap, the dust cap including a cap body and an elastic arm. The cap body is hollow and has an opening. The elastic arm is formed at the opening of the cap body. The cap body is a centrally symmetrical structure having a central axis. The elastic arm is two and is disposed on opposite sides of the central axis. Axially, a first mating portion and a second mating portion are disposed at one end of the elastic arm away from the cap body. The first mating portion is located between the second mating portion and the elastic arm, and the vertical distance between the first mating portion and the central axis is greater than the distance between the second mating portion and the central axis. In use, the dust cap is provided around the periphery of the front frame. The elastic arm extends into a locking groove formed between the mating surface of the slider and the outer surface of the main housing. Through the mating of the elastic arm and the mating surface, the first mating portion abuts the first region, and the second mating portion abuts the second region. The clamping force exerted by the mating surface on the first and second mating portions secures the dust cap to the optical fiber connector plug. When the dust cap needs to be removed, move the sliding part toward the tail end of the main shaft so that the first area leaves the first mating part and the second area leaves the second mating part. When the first area is facing the second mating part in the radial direction, the optical fiber connector plug and the dust cap can be unlocked.

[0061] In one possible implementation, the locking portion includes an elastic arm and a clamping block, one end of the elastic arm is fixedly connected to the main housing, and the elastic arm and the main housing can be an integral connection structure or a split structure assembled into one. The clamping block is fixedly connected to the other end of the elastic arm and protrudes from the surface of the elastic arm facing away from the main housing. A gap is provided between the elastic arm and the main housing. The sliding member includes a sliding body slidably connected to the main housing and a retaining portion connected to one end of the sliding body. The elastic arm is used to cooperate with the snap groove on the optical fiber adapter, and the retaining portion can move into the gap and abut the elastic arm to retain the elastic arm in the snap groove.

[0062] In one possible implementation, a retaining structure is further provided on the outer surface of the main housing. The retaining structure is configured to cooperate with the slider to retain the slider in the first position. Specifically, the retaining structure is a stopper protruding from the outer surface of the main housing. There are two retaining structures, which are spaced apart to form a retaining groove between the two retaining structures.

[0063] In one possible implementation, the sliding member includes a sliding positioning structure, which includes a connecting portion connected to the sliding body and a protruding block structure protruding from the connecting portion. The connecting portion is formed by providing a pair of strip-shaped slits on the sliding body. The setting of the slits makes it easy for the connecting portion to produce radial elastic deformation under the action of external force. The protruding block structure is used to cooperate with the locking structure on the main shaft. Specifically, when the protruding block structure is locked in the limiting groove, the sliding member can be limited to the first position.

[0064] In one possible implementation, there are two sliding positioning structures, which are symmetrically distributed on both sides of the central axis of the sliding member. The present application can achieve a stable connection between the sliding member and the main shaft through the symmetrically arranged sliding positioning structures.

[0065] This embodiment provides another solution for the first locking structure. The elastic arm and the block provided on the locking portion cooperate with the snap groove of the second locking structure, and the stopper portion of the sliding member abuts the elastic arm to achieve the locked state between the first and second locking structures. This embodiment also achieves unlocking by moving the sliding member to separate the stopper portion from the elastic arm.

[0066] In one possible implementation, the card block is located on the side of the elastic arm away from the front end of the main shell, and the card block is located at the end of the elastic arm facing the sliding part. When the fiber optic connector plug is inserted into the fiber optic adapter, the elastic arm is inserted into the adapter first, and the card block enters the fiber optic adapter later. In the locked state, the corresponding abutment of the card block is connected to one end of the sliding body, which can be regarded as the root of the abutment. The abutment force at this position is greater than the end of the abutment away from the sliding body (which can be regarded as the tip of the abutment). Therefore, the structure of the card block and the elastic arm of the present application is coordinated with the position of the sliding part, which is conducive to improving the locking force.

[0067] In one possible implementation, the locking portion includes a locking arm, and a receiving space is provided between the locking arm and the outer surface of the main shell. Along the axial direction of the main shell, the opposite ends of the receiving space are open, and a card slot or a card hole is provided on the locking arm. The receiving space is used to accommodate the second locking structure, and the card slot or the card hole is used to cooperate with the second locking structure. The sliding part includes a sliding body slidably connected to the main shell and a resisting portion connected to one end of the sliding body, and the resisting portion can be moved into the receiving space and resist the second locking structure.

[0068] Specifically, the opening at one end of the receiving space allows the second locking structure on the fiber optic adapter to extend into the receiving space, while the opening at the other end of the receiving space allows the retaining portion of the slider to move into the receiving space. The second locking structure can be a connecting segment structure (i.e., an elastic arm structure with a retaining portion) connected to the connecting segment. The retaining portion of the slider abuts the connecting segment, locking the retaining portion within the slot or hole, achieving a locked state. To unlock, the slider only needs to be moved to allow the retaining portion to leave the receiving space. Under the elastic force of the connecting segment, the retaining portion can be disengaged from the slot or hole.

[0069] In one possible implementation, the locking portion has a sleeve-like structure, with a positioning groove, a locking groove, and a buckle hole provided on its inner surface. The positioning groove is configured to mate with the outer connecting portion of the spindle to securely connect the locking portion to the spindle. There are two positioning grooves, symmetrically located on either side of the central axis of the locking portion. The buckle hole is located at the bottom of the locking groove and is a through-hole structure, connecting the inner and outer surfaces of the locking portion. The locking groove extends in the axial direction of the locking portion and opens at one end surface of the locking portion.

[0070] In a possible implementation, there are two button holes and two locking slots, which are symmetrically distributed on the other two sides of the central axis of the locking portion.

[0071] During assembly, the locking portion is sleeved onto the spindle, and the connecting portion is snapped into the positioning groove to achieve connection between the locking portion and the spindle. In this state, a receiving space is formed between the bottom wall of the locking groove and the spindle, and the locking portion at the bottom wall of the locking groove constitutes a locking arm. It can be understood that a button hole is provided on the locking arm, and the button hole can be a card slot or card hole structure. The receiving space is formed between the locking arm and the outer surface of the spindle. The receiving space is used to accommodate the second locking structure of the optical fiber adapter, and the button hole is used to cooperate with the second locking structure.

[0072] In a possible implementation, the sliding member is elastically connected to the main housing, and the sliding member is maintained in the first position by elastic force.

[0073] In a possible implementation, a limiting structure is provided between the sliding member and the main housing, and the limiting structure is used to limit the sliding member in the first position. The limiting structure can also limit the sliding member in the second position.

[0074] In one possible implementation, the main shell includes a sleeve-shaped main shaft, which is an integrated structure. The main shaft includes relative front and tail ends, the front end of the main shaft is connected to the front frame sleeve, the optical fiber is accommodated in the main shaft, and the tail end is fixedly connected to the optical fiber. A through hole is provided at the tail end, and the through hole passes through the outer surface and the inner surface of the main shaft. The through hole is used to fill glue between the optical fiber and the inner surface of the main shaft to fix the optical fiber and the main shaft.

[0075] Specifically, the optical fiber includes a fiber core, a reinforcement layer wrapped around the fiber core, and an outer layer wrapped around the reinforcement layer. Part of the fiber core extends out of the reinforcement layer and is fixedly connected to the core insert, and part of the reinforcement layer is not wrapped by the outer layer. The glue is used to fix the reinforcement layer and the main axis.

[0076] This application provides a through hole for glue injection at the tail end of the main shaft, and fixes the optical fiber by glue injection. Since the glue fills the gap between the reinforcement layer and the main shaft, it also utilizes the surface structure of the reinforcement layer itself. The reinforcement layer surface has glue injection space, so that the glue can fully contact the optical fiber and the main shaft, improving the fixing effect. Moreover, by removing some materials from the main shaft (without adding any fixing structure) and fixing the optical fiber inside the main shaft, it does not occupy the space outside the main shaft, which is conducive to miniaturization. Moreover, the glue filling between the main shaft and the optical fiber can also achieve a sealed connection between the two, and the sealing effect will not be poor due to the provision of the through hole.

[0077] In a second aspect, the present application provides a fiber optic adapter, comprising a main body sleeve and a ferrule sleeve, the ferrule sleeve being connected to the interior of the main body sleeve, the main body sleeve being provided with a first accommodation space connected to the interior space of the ferrule sleeve, the first accommodation space being used to accommodate a fiber optic connector plug as described in any one of the embodiments of the first aspect, the ferrule sleeve being used to accommodate the ferrule of the fiber optic connector plug, the inner surface of the main body sleeve being used to contact the outer surface of the front frame sleeve of the fiber optic connector plug, a first slot being formed between the main body sleeve and the ferrule sleeve, the first slot being used to accommodate part of the front frame sleeve. The fiber optic adapter provided in the present application achieves matching between the fiber optic adapter and the fiber optic connector plug by the first slot between the main body sleeve and the ferrule sleeve and the front frame sleeve of the fiber optic connector plug, as well as the contact and matching between the inner surface of the main body sleeve and the outer surface of the front frame sleeve. For the fiber optic adapter, its structure is simplified, and the alignment of the fiber optic connector plug inserted therein is achieved by the first slot and the inner surface of the main body sleeve, and the radial dimension can be designed to match the front frame sleeve of the fiber optic connector plug, which has the advantage of a small size.

[0078] In one possible implementation, a guide key is provided on the inner wall of the main sleeve. The guide key extends in the same direction as the central axis of the ferrule sleeve and is configured to engage with the first guide structure on the front frame of the fiber optic connector plug. The axial extension of the guide key allows the main sleeve to be compatible with a straight-in, straight-out fiber optic connector plug, conserving operating space and enabling the arrangement of more fiber optic connection ports within a limited space.

[0079] In one possible implementation, the main sleeve includes a first end, a second end and a main body connected between the first end and the second end, the core sleeve is connected to the inside of the main body, the first end is provided with a second locking structure, the second locking structure is used to cooperate with the first locking structure of the optical fiber connector plug, and the inner surface of the main body is sealed with the sealing structure of the optical fiber connector plug.

[0080] In one possible implementation, the second locking structure includes a slot and an elastic arm, the slot being formed on the inner surface of the main sleeve, the main sleeve including a main body, the elastic arm being located at one end of the main body and extending axially along the main sleeve, the elastic arm including a first section and a second section, the first section being connected between the second section and the main body, the outer surface of the elastic arm being the surface of the elastic arm facing away from the first accommodating space, the vertical distance from the outer surface of the first section to the central axis of the main sleeve being greater than the vertical distance from the outer surface of the second section to the central axis of the main sleeve. The present application designs the elastic arm to be a structure similar to a double step or extending obliquely relative to the axial direction, and the cooperation between the elastic arm and the mating surface of the optical fiber connector plug not only helps to increase the contact area between the mating surface and the elastic arm, but also realizes the function of radially pressing the elastic arm, and the engagement and pressing force on the elastic arm can ensure that the elastic arm is firmly locked in the locking groove and is not easily pulled out.

[0081] In the locked state, the area where the mating surface and the elastic arm press against each other can be the area where the entire elastic arm is located (including the first section and the second section). During the unlocking process, it is only necessary to move the first area of the mating surface on the optical fiber connector plug to the position where the second area is located in the locked state, and the second area is synchronously moved to the outside of the elastic arm, that is, the first section is separated from the first area, the second section is separated from the second area, and the first area is opposite to the second section, but a gap is set between the first area and the second section. In this way, the elastic arm is not pressed, and unlocking is achieved. It can be seen that during the unlocking process, the movement of the sliding part only needs to move the first area to be radially opposite to the second section. It is not necessary to meet the requirement that the mating surface and the elastic arm are completely staggered in the radial direction. The radial partial overlap between the mating surface and the elastic arm can be maintained to achieve unlocking. Therefore, this embodiment has the advantages of stable locking and easy unlocking.

[0082] In a possible implementation, in the radial direction of the main sleeve, the first section is directly opposite to a portion of the slot, and the second section is located at the periphery of the slot.

[0083] In one possible implementation, the outer surface of the elastic arm is stepped; or, an angle is formed between the extension direction of the elastic arm and the axial direction of the main sleeve, and the extension direction of the elastic arm is the extension direction from the main body to the end of the second section away from the main body.

[0084] In one possible implementation, the outer surface of the first section and / or the outer surface of the second section may be provided with an etched structure; alternatively, the outer surface of the elastic arm may be provided with a protrusion configured to engage with a groove on the sliding member of the optical fiber connector plug. Both the etched structure and the protrusion on the elastic arm may enhance locking force.

[0085] In one possible implementation, the second locking structure is a snap groove formed on the inner surface of the main sleeve, and the snap groove includes a limiting groove recessed on the inner surface of the main body and a groove or hole located at the bottom of the groove, and the limiting groove is used to cooperate with the elastic arm of the locking part on the optical fiber connector plug, and the groove or hole is used to cooperate with the card block of the locking part on the optical fiber connector plug.

[0086] In one possible implementation, the main sleeve includes a main body portion, the second locking structure is located at one end of the main body portion and includes a snap portion and a connecting section, the connecting section is connected between the snap portion and the main body portion, the snap portion is protrudingly arranged on the surface of the connecting section away from the central axis of the main sleeve, the connecting section is used to extend into the receiving space between the locking arm on the optical fiber connector plug and the main shell, and the snap portion is used to cooperate with the slot or hole on the locking arm on the optical fiber connector plug.

[0087] In a third aspect, the present application provides a connector assembly comprising the optical fiber connector plug described in any embodiment of the first aspect and the optical fiber adapter described in any embodiment of the second aspect.

[0088] In a fourth aspect, the present application provides a communication device, comprising a housing and a fiber optic adapter connected to the housing as provided in any possible implementation of the second aspect, the housing being provided with a socket, the fiber optic adapter being arranged inside the housing, the socket being opposite to a first accommodation space of the fiber optic adapter.

[0089] In a possible implementation, there are multiple sockets arranged in a row, and there are multiple fiber optic adapters arranged at corresponding socket positions.

[0090] In a possible implementation, there are multiple sockets, which are arranged in at least two rows on the housing. There are also multiple fiber optic adapters, which are correspondingly arranged at the socket positions.

[0091] In one possible implementation manner, the communication device further includes a fiber optic connector plug provided by any possible implementation manner of the first aspect, and the fiber optic connector plug is used to cooperate with the fiber optic adapter.

[0092] The communication device provided in the present application includes a plurality of sockets arranged in a row or multiple rows. By setting the optical fiber adapters at the corresponding positions of the sockets, more optical fiber connection ports can be arranged in a limited space, thereby improving the density of the optical fiber adapters arranged in the communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1 This is a specific application scenario of the optical fiber connector plug provided by this application, specifically a schematic diagram of an FTTH network;

[0094] Figure 2 It is a schematic diagram of a specific embodiment of a communication device in which the optical fiber connector plug provided by the present application is located;

[0095] Figure 3 This is a three-dimensional assembly diagram of the optical fiber connector plug provided by the first embodiment of the present application;

[0096] Figure 4 This is a perspective exploded schematic diagram of the optical fiber connector plug provided in the first embodiment of the present application;

[0097] Figure 5 is a cross-sectional view of a fiber optic connector plug provided in a first embodiment of the present application in one direction;

[0098] Figure 6 is a cross-sectional view of the optical fiber connector plug provided by the first embodiment of the present application from another direction;

[0099] Figure 7 This is a three-dimensional schematic diagram of the ferrule of the optical fiber connector plug provided in the first embodiment of the present application;

[0100] Figure 8 is a cross-sectional view of a ferrule of an optical fiber connector plug provided in the first embodiment of the present application;

[0101] Figure 9 This is a three-dimensional schematic diagram of the front frame sleeve of the optical fiber connector plug provided in the first embodiment of the present application;

[0102] Figure 10 This is a cross-sectional view of the front frame sleeve of the optical fiber connector plug provided in the first embodiment of the present application in one direction;

[0103] Figure 11 1 is a cross-sectional schematic diagram illustrating a first positional relationship between a front frame and a ferrule of an optical fiber connector plug provided in a first embodiment of the present application;

[0104] Figure 12 2 is a cross-sectional schematic diagram illustrating a second positional relationship between the front frame and the ferrule of the optical fiber connector plug provided in the first embodiment of the present application;

[0105] Figure 13 is a cross-sectional view of the front frame sleeve of the optical fiber connector plug provided by the first embodiment of the present application from another direction;

[0106] Figure 14 This is a three-dimensional schematic diagram of the front frame sleeve of the optical fiber connector plug provided in the first embodiment of the present application;

[0107] Figure 15 This is a three-dimensional schematic diagram of the front frame sleeve of the optical fiber connector plug provided in the first embodiment of the present application;

[0108] Figure 16 This is a three-dimensional schematic diagram of the front frame sleeve of the optical fiber connector plug provided in the first embodiment of the present application;

[0109] Figure 17 This is a three-dimensional schematic diagram of a mounting member of an optical fiber connector plug provided in the first embodiment of the present application, viewed from one direction;

[0110] Figure 18 This is a three-dimensional schematic diagram of the mounting member of the optical fiber connector plug provided by the first embodiment of the present application, viewed from another direction;

[0111] Figure 19 is a cross-sectional view of a mounting member of an optical fiber connector plug provided in a first embodiment of the present application;

[0112] Figure 20 This is a partially enlarged schematic cross-sectional view of the optical fiber connector plug provided in the first embodiment of the present application, mainly illustrating the structural features inside the front frame;

[0113] Figure 21 This is a partially enlarged schematic cross-sectional view of the optical fiber connector plug provided in the first embodiment of the present application, mainly illustrating the structural features inside the front frame;

[0114] Figure 22A This is a three-dimensional schematic diagram of a fixing member of an optical fiber connector plug provided in the first embodiment of the present application;

[0115] Figure 22B This is a partially enlarged schematic cross-sectional view of the optical fiber connector plug provided in the first embodiment of the present application, mainly illustrating the positional relationship between the mounting member, the fixing member, and the main shaft;

[0116] Figure 23 This is a three-dimensional schematic diagram of the main shaft of the optical fiber connector plug provided by the first embodiment of the present application;

[0117] Figure 24 It is a plan view of the main axis of the optical fiber connector plug provided by the first embodiment of the present application in one direction;

[0118] Figure 25 is a cross-sectional view of the main shaft of the optical fiber connector plug provided in the first embodiment of the present application;

[0119] Figure 26 This is a three-dimensional schematic diagram of a sliding member of an optical fiber connector plug provided in the first embodiment of the present application in one direction;

[0120] Figure 27This is a three-dimensional schematic diagram of the sliding member of the optical fiber connector plug provided by the first embodiment of the present application from another direction;

[0121] Figure 28 is a cross-sectional view of a specific implementation of the sliding member of the optical fiber connector plug provided in the first embodiment of the present application;

[0122] Figure 29 is a cross-sectional view of another specific implementation of the sliding member of the optical fiber connector plug provided in the first embodiment of the present application;

[0123] Figure 30 This is a three-dimensional schematic diagram of a fixing base of an optical fiber connector plug provided in the first embodiment of the present application;

[0124] Figure 31 1 is a perspective schematic diagram of a dust cap of an optical fiber connector plug provided in the first embodiment of the present application;

[0125] Figure 32 is a three-dimensional schematic diagram of the optical fiber adapter provided by the first embodiment of the present application;

[0126] Figure 33 is a cross-sectional view of a specific implementation of the optical fiber adapter provided in the first embodiment of the present application;

[0127] Figure 34 is a cross-sectional view of another specific implementation of the optical fiber adapter provided in the first embodiment of the present application;

[0128] Figure 35 1 is a perspective schematic diagram of a ceramic sleeve of an optical fiber adapter provided in the first embodiment of the present application;

[0129] Figure 36 This is a cross-sectional diagram of the optical fiber connector plug and the corresponding optical fiber adapter provided by the first embodiment of the present application after being plugged into each other;

[0130] Figure 37 yes Figure 36 An enlarged schematic diagram of part I in FIG;

[0131] Figure 38 yes Figure 36 An enlarged schematic diagram of part II;

[0132] Figure 39 This is another cross-sectional schematic diagram of the optical fiber connector plug provided by the first embodiment of the present application and the corresponding optical fiber adapter after being plugged in;

[0133] Figure 40 yes Figure 39 An enlarged schematic diagram of part III in FIG;

[0134] Figure 41 This is a three-dimensional schematic diagram of a fiber optic connector plug provided in the second embodiment of the present application;

[0135] Figure 42 This is a perspective exploded schematic diagram of a fiber optic connector plug provided in a second embodiment of the present application;

[0136] Figure 43 This is a three-dimensional schematic diagram of the main shaft of the optical fiber connector plug provided in the second embodiment of the present application;

[0137] Figure 44 This is an enlarged partial cross-sectional view of the main shaft of the optical fiber connector plug provided in the second embodiment of the present application;

[0138] Figure 45 1 is a perspective schematic diagram of a sliding member of an optical fiber connector plug provided in a second embodiment of the present application;

[0139] Figure 46 1 is a perspective schematic diagram of a sliding member of an optical fiber connector plug provided in a second embodiment of the present application, viewed from another direction;

[0140] Figure 47 is a cross-sectional view in one direction of a sliding member of a fiber optic connector plug provided in a second embodiment of the present application;

[0141] Figure 48 is a cross-sectional view from another direction of the sliding member of the optical fiber connector plug provided by the second embodiment of the present application;

[0142] Figure 49 is a three-dimensional schematic diagram of a fiber optic adapter provided by a second embodiment of the present application;

[0143] Figure 50 is a cross-sectional view of a fiber optic adapter provided in a second embodiment of the present application;

[0144] Figure 51 1 is a schematic diagram of the optical fiber connector plug and the optical fiber adapter provided in the second embodiment of the present application, wherein the optical fiber connector plug is in a locked state;

[0145] Figure 52 yes Figure 51 An enlarged schematic diagram of part IV;

[0146] Figure 53 This is a schematic diagram of the optical fiber connector plug and the optical fiber adapter provided in the second embodiment of the present application in an unlocked state;

[0147] Figure 54 This is a three-dimensional schematic diagram of a fiber optic connector plug provided in a third embodiment of the present application;

[0148] Figure 55This is a schematic exploded perspective view of a fiber optic connector plug provided in a third embodiment of the present application;

[0149] Figure 56 This is a three-dimensional schematic diagram of the main shaft of the optical fiber connector plug provided in the third embodiment of the present application;

[0150] Figure 57 1 is a perspective schematic diagram of a locking portion of an optical fiber connector plug provided in a third embodiment of the present application, viewed from one direction;

[0151] Figure 58 1 is a perspective schematic diagram of the locking portion of the optical fiber connector plug provided in the third embodiment of the present application, viewed from another direction;

[0152] Figure 59 is a cross-sectional schematic diagram of a locking portion of a fiber optic connector plug provided in a third embodiment of the present application;

[0153] Figure 60 1 is a perspective schematic diagram of a sliding member of an optical fiber connector plug provided in a third embodiment of the present application;

[0154] Figure 61 is a three-dimensional schematic diagram of a fiber optic adapter provided by a third embodiment of the present application;

[0155] Figure 62 is a cross-sectional schematic diagram of a fiber optic adapter provided in a third embodiment of the present application;

[0156] Figure 63 1 is a schematic diagram of a fiber optic connector plug and a fiber optic adapter provided in a third embodiment of the present application, wherein the fiber optic connector plug is in a locked state;

[0157] Figure 64 yes Figure 63 An enlarged schematic diagram of the middle V portion;

[0158] Figure 65 This is a schematic diagram of the optical fiber connector plug and the optical fiber adapter provided in the third embodiment of the present application in an unlocked state. DETAILED DESCRIPTION

[0159] For ease of understanding, the relevant technical terms involved in the embodiments of this application are explained and described below.

[0160] Axial direction: It can be understood as the axial direction of the fiber optic connector plug, which is equivalent to the extension direction of the optical fiber and the ferrule, that is, the direction from the tail of the optical fiber to the front end of the optical fiber and then to the front end of the ferrule, which is equivalent to the axial direction of the shell component in the fiber optic connector plug that is sleeved on the periphery of the optical fiber.

[0161] Radial direction: the direction perpendicular to the axial direction.

[0162] Sleeve-shaped: It is placed on the outer surface of a long object to protect, strengthen, fix or connect it. The sleeve-shaped element includes a cylindrical (or tubular) shell with a hollow space inside. Both end faces of the cylindrical (or tubular) shell are provided with openings. The long object can pass through the sleeve-shaped element through these two openings. For example, an optical fiber can extend into the shell assembly from one end opening and can extend out of the shell assembly from the other end opening. The end face of the sleeve-shaped element includes an inner edge and an outer edge. The inner surface of the sleeve-shaped element is connected between the inner edges of the two end faces and faces the hollow space inside. The outer surface of the sleeve-shaped element is connected between the outer edges of the two end faces and faces the space outside the sleeve-shaped element. The axial direction of the sleeve-shaped element is the direction extending from one end face to the other end face, and its radial direction is the direction extending perpendicularly from the inner surface to the outer surface, which can be understood as perpendicular to its axial direction. The outer contour of the cross-section of the sleeve-shaped element can be circular, polygonal, triangular or other regular or irregular shapes, which is not limited in this application.

[0163] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0164] The fiber optic connector plug, fiber optic adapter, connector assembly and communication equipment provided in the present application are applied to the FFTx system. The FFTx system can be, but is not limited to, FFTH (fiber to the home), FFTC (fiber to the curb), FTTP (fiber to the premises), FTTN (fiber to the node or neighborhood), FTTO (fiber to the office), and FTTSA (fiber to the service area). In the embodiments of the present application, the application of the communication equipment to the fiber to the home (FTTH) system is taken as an example for description. Figure 1 , Figure 1 The figure shows a schematic diagram of an FTTH network. A pre-connected distribution point (Connectorised Fiber Distribution Point, CFDP) 2 and a fiber splitter box 3 are provided between the central office (CO) 1 and the customer splicing point (CSP) 4. The communication equipment in the central office 1 is connected to the pre-connected distribution point 2 via an optical cable, and the signal is distributed to the pre-connected distribution point 2. The pre-connected distribution point 2 transmits the signal to the fiber splitter box 3 via an optical cable, and then outputs the signal through the fiber splitter box 3 (transmitted via an optical cable) to the customer terminal box 4.

[0165] The communication equipment provided in the present application may be, but is not limited to, a fiber access terminal (FAT) and a splitting and splicing closure (SSC).

[0166] Figure 2 Figure 1 shows a schematic diagram of a communication device 1000 provided in one embodiment. Communication device 1000 includes a housing 400, an adapter assembly 200A, an indoor connector assembly 300A, and an outdoor connector assembly 100A. The adapter assembly 200A is fixed to the housing 400, the indoor connector assembly 300A is housed within the housing 400, and the outdoor connector assembly 100A is located outside the housing 400. The outdoor connector assembly 100A and the indoor connector assembly 300A can be plugged together through the connection of the adapter assembly 200A, thereby enabling optical signal transmission.

[0167] It should be understood that the difference between the indoor connector assembly 300A and the outdoor connector assembly 100A lies in their respective usage scenarios. The indoor connector assembly 300A can be understood as being located inside the housing 400 in a relatively closed space, effectively isolating it from external dust, moisture, etc. The outdoor connector assembly 100A can be understood as being located outside the housing 400 in a relatively open space, requiring greater environmental adaptability to cope with complex and changing external environments.

[0168] Specifically, the housing 400 includes a housing 401 and a top cover 402 that covers the housing 401. The housing 401 is provided with a plurality of side-by-side sockets 4011, which can be arranged in one row or multiple rows. The adapter assembly 200A includes a plurality of fiber optic adapters 200, with the number of fiber optic adapters 200 being equal to or less than the number of sockets 4011 (a less number indicates that some of the sockets can be reserved for other uses). In other embodiments, the sockets 4011 can also be provided on the top cover 402. Each fiber optic adapter 200 can be positioned at a corresponding socket 4011.

[0169] The indoor connector assembly 300A includes a plurality of indoor fiber optic connector plugs 300, each of which is housed in a housing 400. Furthermore, the number of indoor fiber optic connector plugs 300 may be the same as, or less than, the number of fiber optic adapters 200, such that each indoor fiber optic connector plug 300 can be plugged into a corresponding fiber optic adapter 200.

[0170] The outdoor connector assembly 100A includes a plurality of outdoor fiber optic connector plugs 100. The number of the outdoor fiber optic connector plugs 100 may be the same as or less than the number of the fiber optic adapters 200. Each outdoor connector plug 100 may be plugged into a corresponding fiber optic adapter 200 from outside the housing 400.

[0171] It can be understood that, at both ends of the optical fiber adapter 200, there is respectively provided with an opening adapted for the indoor optical fiber connector plug 300 and an opening adapted for the outdoor optical fiber connector plug 100. The indoor optical fiber connector plug 300 and the outdoor optical fiber connector plug 100 are respectively inserted into the two openings of the optical fiber adapter 200, so that the ferrules of the indoor optical fiber connector plug 300 and the outdoor optical fiber connector plug 100 are docked in the optical fiber adapter 200, that is, the docking of the two optical fibers that need to be connected is realized, so that the optical signal output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent.

[0172] Thus, each indoor fiber optic connector plug 300 and each outdoor fiber optic connector plug 100 can be plugged into the corresponding fiber optic adapter 200 from inside and outside the housing 400, respectively, so that each indoor fiber optic connector plug 300 can be plugged into the corresponding outdoor fiber optic connector plug 100. In other words, one indoor fiber optic connector plug 300, one fiber optic adapter 200, and one outdoor fiber optic connector plug 100 can together form a connector assembly to implement a link transmission of an optical signal.

[0173] The communication device 1000 provided in the present application includes a plurality of sockets 4011 arranged in a row or multiple rows. By correspondingly setting the optical fiber adapters 200 at the positions of the sockets 4011, more optical fiber connection ports can be arranged in a limited space, thereby improving the density of the optical fiber adapters arranged in the communication device.

[0174] The optical fiber connector plug provided in this application can be Figure 2 The outdoor optical fiber connector plug 100 in the communication device 1000 of the embodiment shown may also be Figure 2 The indoor optical fiber connector plug 300 in the communication device 1000 of the illustrated embodiment is described in detail below with reference to three specific embodiments of optical fiber connector plugs with different structures and optical fiber adapters therewith, wherein the optical fiber connector plug is an outdoor optical fiber connector plug.

[0175] The optical fiber connector plug provided in the first embodiment is described in detail as follows.

[0176] See Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , Figure 3 A three-dimensional assembly diagram of a fiber optic connector plug provided in a possible embodiment is shown. Figure 4 for Figure 3 The three-dimensional exploded diagram of the optical fiber connector plug is shown. Figure 4 Added dust cap, Figure 5 and Figure 6 The following are cross-sectional views of a fiber optic connector plug taken from different directions. The fiber optic connector plug 100 provided in this application includes a transmission member 10, a shell assembly 20, a sealing structure 30, a sliding member 40, a dust cap 50, a first elastic member 60, and a second elastic member 70. The shell assembly 20 is disposed around the periphery of the transmission member 10 to protect the transmission member 10 and to facilitate insertion and removal of the fiber optic connector plug 100. The dust cap 50 may be a part of the shell assembly 20, or the fiber optic connector plug 100 may not include the dust cap 50. The sliding member 40 is slidably connected to the outer surface of the shell assembly 20 and is used to lock and unlock the fiber optic connector plug 100 with the fiber optic adapter 200. The sealing structure 30 is disposed on the outer surface of the shell assembly 20 and is located at the front end of the sliding member 40 in the axial direction. The sealing structure 30 is used to seal the inner surface of the fiber optic adapter 200. For the fiber optic connector plug 100, the front end refers to the end that plugs into the fiber optic adapter (which can be understood as the end where the ferrule is located), and the tail end or rear end refers to the end away from the ferrule.

[0177] See Figure 4 、 Figure 5 and Figure 6 The transmission component 10 includes an optical fiber 11 and a ferrule 12, which is connected to the front end of the optical fiber 11. The housing assembly 20 includes a front housing 21 and a main housing 22. The front housing 21 is a sleeve-like structure that surrounds the ferrule 12, that is, it is sleeved around the periphery of the ferrule 12. Of course, the interior space of the front housing 21 can also accommodate a portion of the optical fiber 11. The front housing 21 is used to protect the ferrule 12 and is used for plugging and mating with the optical fiber adapter 200. The main housing 22 includes a mounting member 221, a fixing member 222, a main shaft 223, a fixing seat 224, a tail sleeve 225, and a heat shrink tubing 226. The main shell 22 is in the shape of a sleeve as a whole and is used to accommodate the optical fiber 11. The various components within the main shell 22 are also in the shape of a sleeve. In this embodiment, the main shell 22 is formed by assembling and connecting six components, and the components are fixedly connected to each other. Therefore, some of the components can be an integrated structure. For example, the fixing part 222 can be integrally formed on the front end surface of the main shaft 223, so the fixing part 222 can be regarded as a part of the main shaft 223.

[0178] See Figure 4 、 Figure 5 and Figure 6The optical fiber 11 includes a core 111, a reinforcement layer 112 wrapped around the outer periphery of the core 111, and an outer layer 113 wrapped around the outer periphery of the reinforcement layer 112. Part of the core 111 extends out of the reinforcement layer 112 and is fixedly connected to the ferrule 12. Part of the reinforcement layer 112 of the optical fiber is not wrapped by the outer layer, and part of the outer layer is also located inside the shell assembly 20. The material of the reinforcement layer 112 can be metal or non-metal. The reinforcement layer 112 made of metal can be steel wire, and the reinforcement layer 112 made of non-metal can be FRP (fiber reinforced composite material). The reinforcement layer 112 mainly plays the role of strengthening the tensile strength and balance of the optical fiber. The outer surface of the reinforcement layer 112 is not as smooth as the outer surface of the outer layer. The outer surface of the reinforcement layer 112 can have a concave and convex structure, similar to a tooth-like structure. The purpose of exposing the reinforcement layer 112 (i.e., not being wrapped by the outer layer) is so that the reinforcement layer 112 can be fixedly connected to the shell assembly 20. The core 111 of the optical fiber 11 is fixed to the ferrule 12 by curing glue. The detailed structure of the ferrule 12 is described as follows.

[0179] See Figure 7 and Figure 8 The ferrule 12 includes a front face 121 and a rear face 122, with a front section 123, a middle section 124, and a rear section 125 sequentially connected between the front face 121 and the rear face 122. The front section 123 and the rear section 125 both have a centrally symmetrical structure. For example, the rear section 125 is cylindrical, and the front section 123 is a combination of a cylindrical and a truncated cone. The middle section 124 includes a first limiting structure 1241 and a first stopping structure 1242. Along the axial direction, the first limiting structure 1241 is located between the first stopping structure 1242 and the front section 123. The first limiting structure 1241 is used to cooperate with the shell assembly 20 to limit the ferrule 12 in the circumferential direction, that is, to prevent the ferrule 12 from rotating relative to the shell assembly 20. The first limiting structure 1241 includes a first plane 1243. The number of the first plane 1243 can be one, two or more. As long as the arrangement of the first plane 1243 can make the middle section 124 a non-rotationally symmetrical structure, it can have the function of limiting the position in the circumferential direction. Figure 7As shown, there are four first planes 1243, which are spaced and symmetrically distributed on the outer surface of the middle section 124. The first stopping structure 1242 is a columnar structure connected to the first limiting structure 1241. The first stopping structure 1242 includes a first limiting surface 1244. The first limiting surface 1244 faces the front end surface 121 of the ferrule 12. In this embodiment, the number of the first limiting surfaces 1244 is also set corresponding to the number of the first planes 1243, and the first limiting surfaces 1244 are perpendicularly connected to the first planes 1243. In the process of making the ferrule 12, a piece is cut off from the outer surface of the cylindrical entity by cutting, and the first plane 1243 and the first limiting surface 1244 are formed at the same time. The outer surface of the rear section 125 is used to sleeve the first elastic member 60 (such as a spring). The surface of the first stopping structure 1242 facing the rear section 125 is the positioning surface 1245, and this positioning surface 1245 is used to abut the first elastic member 60. A core fixing hole 1251 is provided in the rear section 125, and an opening is formed in the core fixing hole 1251 on the rear end face 122 for inserting the core 111. A light hole 126 is formed between the bottom of the core fixing hole 1251 and the front end face 121 of the ferrule 12, and the bottom refers to the position in the core fixing hole 1251 facing the opening.

[0180] When the optical fiber connector plug 100 is mated with another optical fiber connector plug within the optical fiber adapter 200, optical signal transmission is achieved between the two optical fiber connector plugs 100 through the front end face 121 of the ferrule 12. Therefore, for the optical fiber connector plug 100, the front end face 121 of the ferrule 12 needs to be protected by the housing assembly 20 to ensure that the front end face 121 of the ferrule 12 is not scratched and to ensure the quality of optical transmission.

[0181] The present application can protect the front end surface of the ferrule 12 by using the front frame cover 21 on the shell assembly 20. The front frame cover 21 is described in detail as follows (see Figures 9 to 16 for description).

[0182] See Figure 9 、 Figure 10 The front frame cover 21 is sleeve-shaped and includes a front end surface 211 and a rear end surface 212. Figures 4 to 6 In the optical fiber connector plug 100 , the front frame 21 is located at the front end of the shell assembly 20 , and the rear end surface 212 of the front frame 21 is used to connect to the main shell 22 .

[0183] See Figure 11 In one embodiment, the front end surface 211 of the front frame 21 is flush with the front end surface 121 of the ferrule 12. Figure 12In another embodiment, the front end face 121 of the ferrule 12 is surrounded by the inner surface of the front frame housing 21, that is, the front end face 121 of the ferrule 12 is retracted into the interior of the front frame housing 21, and the front end face 211 of the front frame housing 21 protrudes beyond the front end face 121 of the ferrule 12 in the axial direction. In the axial direction, the distance between the front end face 121 of the ferrule 12 and the front end face 211 of the front frame housing 21 is L. This embodiment can also be understood as: the vertical projection of the front end face 121 of the ferrule 12 on the front frame housing 21 is located on the front end face 211 of the front frame housing 21 or the inner surface of the front frame housing 21, thereby achieving protection of the front end face of the ferrule 12. Figure 11 and Figure 12 In the embodiment, the front face 11 of the front frame housing 21 can protect the front face of the ferrule 12. Specifically, the front frame housing 21 can protect the front face of the ferrule during turnover, transportation, and insertion and removal from the optical fiber adapter. When subsequently mated with the ferrule of the opposite connector plug, it ensures stable and reliable transmission of optical signals between the two.

[0184] See Figure 11 and Figure 12 A slot 217 is formed between the inner surface of the front frame sleeve 21 and the ferrule 12. The slot 217 forms an opening between the front end surface 211 of the front frame sleeve 21 and the front end surface 121 of the ferrule 12. The slot 217 is used to cooperate with the ferrule sleeve of the optical fiber adapter. That is, when the optical fiber connector plug is inserted into the optical fiber adapter, the ferrule is inserted into the ferrule sleeve, and the ferrule sleeve is inserted into this slot 217 at the same time. One end of the ferrule sleeve must extend into the slot 217, that is, the end face of the ferrule sleeve is located in the slot 217 and is arranged opposite to the bottom of the slot 217. The bottom of the slot 217 refers to the end opposite to the opening of the slot 217.

[0185] Figures 9 to 13In the illustrated embodiment, two oppositely disposed notches G1 and G2 are defined on the front frame cover 21 near the front end surface 211. The front end surface 211 of the front frame cover 21 is formed between the two notches G1 and G2. That is, the front end surface 211 includes a first surface 211A and a second surface 211B. The first surface 211A and the second surface 211B are symmetrically disposed on either side of the central axis of the front frame cover 21. Specifically, if the first surface 211A and the second surface 211B are connected to form a complete circular ring, the first surface 211A and the second surface 211B are each less than or equal to one-quarter of the circular ring, so that the positions of the two notches G1 and G2 can accommodate the portion of the side wall where the front end face of the front ferrule of the other optical fiber connector plug is located. It can be understood that when the same pair of optical fiber connector plugs 100 are inserted into the same optical fiber adapter 200, because the front end face of the front ferrule 21 protrudes beyond the front end face 211 of the ferrule 12, the two ferrules 12 need to be butted together, and the two front ferrules 21 need to have an interference fit. The two notches G1 and G2 are designed to solve this butting interference fit problem. The positions of the two notches G1 and G2 can accommodate the portion of the front end face 211 of the other front ferrule 21.

[0186] Specifically, the two notches G1 and G2 can be symmetrically arranged on both sides of the central axis of the front frame cover 21. The symmetrical arrangement allows the force on the outer cover to be more uniform and balanced when plugged in. The overall strength of the outer frame cover is high, which can minimize the possibility of connection failure due to unbalanced force.

[0187] In another embodiment, see Figure 14 A notch G is provided on the front frame cover 21 at one end close to the front end surface of the front frame cover 21, so that the front end surface 211 of the front frame cover 21 forms an unclosed continuously extended surface. For example, the front end surface 211 can be C-shaped, arc-shaped, or semicircular.

[0188] The setting of the notch G can make the front end of the optical fiber connector plug present a concave-convex shape suitable for plugging in, so that when the optical fiber connector plug is plugged into the optical fiber adapter, compared with the flat front end shape of the optical fiber connector plug, it can better adapt to the internal space of the optical fiber adapter, avoid the loose connection due to the limitation of the internal space of the optical fiber adapter, improve the stability and reliability of the plugging, have strong practicality, and have a wide range of applications.

[0189] The present invention provides a notch G at the front end of the front housing, which also has the advantage of facilitating observation. A worker can visually see at least the front end of the ferrule when looking directly at the outer surface of the outer housing with the notch G. Thus, when connecting the fiber optic connector and the fiber optic adapter, the worker can see the position of the ferrule, facilitating insertion and improving the success rate of insertion. It also prevents the ferrule from being repeatedly bumped due to misinsertion, thereby avoiding damage to the ferrule.

[0190] In another embodiment, see Figure 15 The front end face 211 of the front frame housing 21 is a closed annular structure, i.e., the front end face 211 has no notch. The front end face 211 can be annular or have other shapes. For example, the inner edge of the front end face 211 can have a circular outline, while the outer edge of the front end face 211 can have a square outline. The square outer outline can easily match the internal space of a fiber optic adapter of the same shape.

[0191] Figures 9 to 16 In the illustrated embodiment, a first guide structure 213 is provided on the outer surface of the front frame cover 21. The first guide structure 213 extends in the axial direction. The first guide structure 213 may extend from the front end face 211 of the front frame cover 21 to the rear end face 212 of the front frame cover 21, or from the front end face 211 of the front frame cover 21 to the middle position of the front frame cover 21. The middle position refers to a position between the front end face 211 and the rear end face 212, and does not only represent the center position of the front end face 211 and the rear end face 212, but may also be a position close to the front end face 211 or a position close to the rear end face 212.

[0192] See Figure 9 、 Figure 10 、 Figure 14 and Figure 15 In one embodiment, in the radial direction, the first guide structure 213 may be a groove structure recessed on the outer surface of the front frame cover 21 , that is, the first guide structure 213 does not penetrate the inner surface of the front frame cover 21 .

[0193] See Figure 16 In one embodiment, the first guide structure 213 passes through the inner and outer surfaces of the front frame cover 21 (ie, the cutout or hollow structure formed on the front frame side 21).

[0194] In the axial direction, the first guide structure 213 can be arranged at the position corresponding to the notch, and the first guide structure and the notch can provide a striking reminder for the alignment of the optical fiber connector plug during the insertion process. Figure 15As shown, taking the first guide structure 213 as a slot structure as an example, the opening of the first guide structure 213 facing the front end face 211 of the front frame 21 communicates with the notch G. To facilitate the engagement of the guide key on the fiber optic adapter, a chamfer can be formed at the opening of the first guide structure 213 facing the front end face 211, resulting in a trumpet-shaped, flared shape at the front end of the first guide structure 212. This chamfer provides a certain margin of error for the first guide structure 213. Even if the guide key on the fiber optic adapter is misaligned with the first guide structure 213, it can slide into the first guide structure 213 under the guidance of the chamfer. This improves the efficiency and success rate of the connection when the operator inserts the fiber optic connector plug into the fiber optic adapter. The chamfer can also be rounded, which has no edges and a smoother surface, effectively preventing wear on the corresponding structure on the fiber optic adapter and enhancing safety.

[0195] In other embodiments, the first guide structure 213 may also be a structure protruding from the outer surface of the front frame cover 21 .

[0196] The number of the first guide structure 213 can be one, two, or more. Two or more first guide structures 213 can be evenly spaced and arranged on the outer surface of the front frame cover 21 in the circumferential direction.

[0197] A first guide structure 213 is provided, and during the process of docking the optical fiber connector plug with the optical fiber adapter, the front frame sleeve 21 can have a striking reminder and guiding function, thereby facilitating the alignment of the optical fiber connector plug with the optical fiber adapter, improving the accuracy of the plug-in docking, and preventing the core component of the optical fiber connector plug from being damaged or failing due to multiple collisions due to the misinsertion of the optical fiber connector plug, thereby effectively increasing the service life of the optical fiber connector plug.

[0198] The outer surface of the front housing 21 is cylindrical. Because it mates with the adapter and provides a guide structure, the outer surface of the front housing 21 also forms the outer surface of the fiber optic connector plug 100. During the mating process with the fiber optic adapter 200, the outer surface of the front housing 21 is directly exposed to the exterior of the fiber optic connector plug 100, with no other components obstructing the front housing 21. When the fiber optic connector plug 100 is not in use, a dust cap 50 can be placed over the outer surface of the front housing 21. Because only one front housing 21 surrounds the ferrule 12 of the fiber optic connector plug 100, the structure is simple and the size can be minimized. Therefore, the dust cap 50 can be designed to be relatively small.

[0199] In one embodiment, see Figure 10 、 Figure 11 and Figure 12The inner surface of the front housing 21 is provided with a second retaining structure 214, which is configured to cooperate with the first retaining structure 1241 on the ferrule 12 to prevent the ferrule 12 from rotating within the front housing 21. Specifically, the front housing 21 includes a central axis C1 extending between the center of the front face 211 and the center of the rear face 212. The second retaining structure 214 protrudes from the inner surface of the front housing 21 and includes a second flat surface 2142. The second flat surface 2142 faces the central axis C1. The second flat surface 2142 can also be understood as being the surface of the second retaining structure 214 facing away from the outer surface of the front housing 21. The second flat surface 2142 is configured to cooperate with the first flat surface 1243 of the first retaining structure 1241 of the ferrule 12. The present application does not limit the first flat surface 1243 and the second flat surface 2142 to theoretically planar features. It can be understood that the first flat surface can also be a nearly flat surface, such as a nearly flat curved surface, or that the first and second flat surfaces can have concave and convex structures.

[0200] In one embodiment, see Figure 13 The inner surface of the front frame cover 21 is provided with a clamping hole 215. The clamping hole 215 is a hole-like structure that penetrates the inner and outer surfaces of the front frame cover 21. The clamping hole 215 can also be a clamping groove structure recessed in the inner surface of the front frame cover 21. The clamping hole 215 is used to fix the mounting member 221 of the main housing 22. The number of the clamping holes 215 can be one, two, or more. Figure 11 In the illustrated embodiment, there are two latching holes 215 , which are oppositely disposed on either side of the central axis of the front frame cover 21 .

[0201] Figures 9 to 16 In the illustrated embodiment, a first notch 216 is defined on the rear end surface 212 of the front frame cover 21. The first notch 216 forms openings on the rear end surface 212, the inner surface, and the outer surface of the front frame cover 21. The first notch 216 is configured to cooperate with a protrusion 2232 on the main housing 22 to circumferentially position the front frame cover 21 and the main housing 22, thereby preventing the front frame cover 21 from rotating relative to the main housing 22.

[0202] The front housing 21 provided in this application has a front face 211 that protects the front face 121 of the ferrule 12, an inner surface that engages with the ferrule 12, an outer surface that mates with the inner surface of the fiber optic adapter 200 and includes a first guide structure 213, and a rear face that mates with the main housing 22 for positioning. Multiple functions are achieved through a single front housing 21. Furthermore, the outer surface of the front housing 21 is exposed, forming the outer surface of the fiber optic connector plug 100. In other words, there is only one front housing 21 around the ferrule 12. This application integrates the protective features (the front face 211 of the front housing 21) and the mating features (the slot formed between the inner surface of the front housing 21 and the ferrule 12, and the mating contact between the outer surface of the front housing 21 and the inner surface of the fiber optic adapter) on the front housing 21. This not only reduces the number of components and simplifies the structure of the fiber optic connector plug 100, but also facilitates a miniaturized radial design.

[0203] The rear end of the front frame 21 forms a fully enclosed cylindrical structure, meaning it is circumferentially closed. Even with the first notch 216, after the front frame 21 and spindle 223 are assembled, the first notch 216 is filled with the corresponding protrusion on the spindle 223. Therefore, the rear end of the front frame 21 in the assembled optical fiber connector plug remains fully enclosed and circumferentially closed. This improves the structural strength of the front frame and the connection strength between the front frame and spindle. Furthermore, as the exterior design of the optical fiber connector plug, the fully enclosed structure of the front frame contributes to its overall appearance and enhances the user experience.

[0204] The mounting member 221 and the front frame cover 21 are stacked in a radial direction, and the front frame cover 21 is sleeved on the periphery of the mounting member 221. The mounting member 221 is described in detail as follows.

[0205] See Figure 17 and Figure 18 The mounting member 221 includes a mounting member body 2211, an elastic hook 2212 and a second stopping structure 2213. The elastic hook 2212 and the second stopping structure 2213 are formed at the front end of the mounting member body 2211, and the rear end face 2214 of the mounting member body 2211 is used to dock with the main shaft 223.

[0206] See Figure 19The mounting member body 2211 is sleeve-shaped and includes a central axis C2. The second retaining structure 2213 protrudes from the inner surface of the mounting member body 2211. The second retaining structure 2213 includes a second limiting surface 2215 and a contact surface 2216. The second limiting surface 2215 faces the rear end of the mounting member body 2211, and the contact surface 2216 faces the central axis C2 of the mounting member body 2211. Specifically, the second limiting surface 2215 is perpendicularly connected to the contact surface 2216. Both the second limiting surface 2215 and the contact surface 2216 are planar. The second limiting surface 2215 is configured to mate with the first limiting surface 1244 of the first retaining structure 1242 on the ferrule 12, while the contact surface 2216 is configured to mate with the first flat surface 1243 of the first limiting structure 1241 of the ferrule 12.

[0207] See Figure 19 There are two second stopping structures 2213, which are relatively arranged on both sides of the central axis C2 of the mounting body. The axial dimension of one second stopping structure 2213 is smaller than the axial dimension of the other second stopping structure 2213. A mounting notch 2217 is formed on the side of one of the second stopping structures 2213 facing away from the mounting body 2211. The position of this mounting notch 2217 is opposite to the partial contact surface 2216 of the other second stopping structure 2213. This mounting notch 2217 is used to accommodate the second limiting structure 214 of the front frame cover 21.

[0208] See Figure 20 The second plane 2142 of the second limiting structure 214 of the front frame cover 21 is coplanar with the contact surface 2216 of one of the second stopping structures 2213 , and is arranged opposite to the contact surface 2216 of the other second stopping structure 2213 .

[0209] See Figure 21 The outer surface of the mounting member body 2211 contacts the inner surface of the front frame cover 21, and the inner surface of the mounting member body 2211 contacts the insert 12. The elastic hook 2212 is used to cooperate with the clamping hole 215 on the front frame cover 21 to fix the mounting member 221 and the front frame cover 21. Figure 17 As shown, there are two elastic hooks 2212, which are symmetrically distributed on both sides of the central axis C2 of the mounting body 2211. The two second stop structures 2213 are respectively located on both sides of the elastic hook 2212, and in the circumferential direction, the two second stop structures 2213 are distributed between the two elastic hooks 2212. In other embodiments, the number of elastic hooks 2212 can also be only one, or the number of elastic hooks 2212 can be three or more, which is not specifically limited in this application.

[0210] The fixing method between the mounting member 221 and the front frame cover 21 is not limited to the cooperation between the elastic hook 2212 and the locking hole 215. In other embodiments, other fixing methods can be used. For example, the mounting member 221 may not be provided with the elastic hook 2212. The mounting member 221 and the front frame cover 21 may be fixed by screws, which pass through the front frame cover 21 and are fixed in the mounting member 221; or the mounting member 221 and the front frame cover 21 may be fixedly connected by adhesive; or a hook may be provided on the front frame cover 21, and a locking groove or a locking hole may be provided on the mounting member 221, and the mounting member 221 and the front frame cover 21 may be fixed by the cooperation between the hook and the locking groove or the locking hole.

[0211] See Figure 17 、 Figure 18 and Figure 19 The rear end surface 2214 of the mounting member body 2211 is provided with a second notch 2218. The second notch 2218 forms openings on the rear end surface 2214, the inner surface, and the outer surface of the mounting member body 2211. The second notch 2218 is used to achieve positioning between the mounting member 221 and the main shaft 223, positioning the mounting member 221 and the main shaft 223 in the circumferential direction, and preventing the mounting member 221 from rotating relative to the main shaft 223. Figure 20 and Figure 21 After the front frame sleeve 21 is installed on the mounting member 221, the rear end surface 2214 of the mounting member body 2211 and the rear end surface 212 of the front frame sleeve 21 become coplanar and together form a docking surface S1, which abuts the end surface of the spindle 223. The structural design of the docking surface S1 abutting the end surface of the spindle 223 ensures that the connection between the front frame sleeve 21 and the spindle 223 only occupies the space on the end surface of the spindle 223 and does not extend to the outer surface of the spindle 223. Furthermore, the outer surface of the front frame sleeve 21 can be coplanar with the outer surface of the spindle 223, or can be smoothly connected to it. For example, if the outer surface of the front frame sleeve 21 is a cylindrical surface and the outer surface of the spindle 223 is also a cylindrical surface, when the front frame sleeve 21 is docked to the end surface of the spindle 223, these two cylindrical outer surfaces of the same radial dimension abut to form a complete cylindrical outer surface. The butt joint surface S1 and the end surface of the main shaft 223 are positioned circumferentially by means of a structure in which notches and protrusions cooperate. Specifically, the first notch 216 and the second notch 2218 are aligned in the radial direction, so as to position the front frame sleeve 21 and the mounting member 221 to the main shaft 223 .

[0212] The docking surface S1 and the main shaft 223 can form a sealed connection. The function of this sealed connection is to seal and isolate the space inside the main shaft 223 from the external space, thereby protecting the fiber core and the ferrule from erosion by dust, water vapor, etc., thereby improving the service life of the optical fiber connector plug, and the efficiency and quality of optical transmission.

[0213] See Figures 18 to 21 The inner surface of the mounting member body 2211 is further provided with a threaded portion 2219, and the threaded portion 2219 is used for fixing and connecting the fixing member 222. Figure 19 The fixing member 222 is also sleeve-shaped, and an external thread 2221 is provided on the outer periphery of the front end of the fixing member 222. The front end of the fixing member 222 extends into the mounting member 221 and is fixedly connected to the threaded portion 2219 on the mounting member 221. The rear end of the fixing member 222 extends into the main shaft 223 and is fixedly connected to the inner surface of the main shaft 223.

[0214] Specifically, see Figure 22A The rear end of the fixing member 222 forms an elastic latching arm 2222, which extends in the axial direction. A latching portion 2223 is protruding from the outer surface of the elastic latching arm 2222. The latching portion 2223 is used to cooperate with the limiting step on the inner surface of the main shaft 223 to fix the fixing member 222 to the main shaft 223. The rear end of the fixing member 222 is provided with three elastic latching arms 2222, and gaps 2224 are formed between adjacent elastic latching arms 2222. The formation of the gaps 2224 is used to enable the elastic latching arms 2222 to elastically swing in the radial direction. In other embodiments, the number of elastic latching arms 2222 can also be one, two or more, which is not limited in this application.

[0215] See Figure 20 、 Figure 21 and Figure 22A In one possible implementation, part of the fixing member 222 is located inside the main shaft 223, and the other part is located inside the mounting member 221, that is, the fixing member 222 is completely surrounded, and the main shaft 223 and the mounting member 221 are connected at the periphery of the fixing member 222.

[0216] In other embodiments, the fixing member 222 may also be partially exposed to form the exterior surface of the optical fiber connector plug. Figure 22B In this embodiment, the fixing member 222 is a sleeve-shaped structure, and the fixing member 222 includes a front end 2225, a rear end 2226 and a middle portion 2227 connected between the front end 2225 and the rear end 2226. The front end 2225 of the fixing member 222 extends into the inner side of the mounting member 221 and is fixedly connected to the mounting member 221, and the rear end 2226 of the fixing member 222 extends into the inner side of the main shaft 223 and is fixedly connected to the main shaft 223. The middle portion 2227 is located between the front end of the main shaft 223 and the rear end of the mounting member 221. It can also be understood that the middle portion 2227 is located between the front end of the main shaft 223 and the rear end of the front frame sleeve 21, and the outer surface of the middle portion 2227 forms the appearance surface of the optical fiber connector plug.

[0217] Specifically, the front end 2225 is detachably connected to the mounting member 221 by means of a buckle and a hole. The outer periphery of the front end 2225 is provided with a buckle, and the mounting member 221 has a hole extending through the inner and outer surfaces. The buckle of the front end 2225 is received in the hole of the mounting member 221. The rear end 2226 is also detachably connected to the main shaft 223 by means of a buckle and a hole. The outer periphery of the rear end 2226 is provided with a buckle, and the main shaft 223 has a hole extending through the inner and outer surfaces. The buckle of the rear end 2226 is received in the hole of the main shaft 223.

[0218] In this embodiment, a sealing groove is provided on the periphery of the middle portion 2227 for accommodating the seal 30. Of course, under the architecture of this embodiment, a sealing groove may not be provided on the periphery of the middle portion 2227, but the sealing groove may be provided on the outer surface of the main shaft 223. When the optical fiber connector plug is plugged into the optical fiber adapter, the middle portion 2227 is located inside the optical fiber adapter, and the front end of the main shaft 223 also extends into the optical fiber adapter.

[0219] A sealing structure may also be provided between the rear end 2226 of the fixing member 222 and the main shaft 223 .

[0220] It is understood that a guide structure may also be provided around the periphery of the central portion 2227. This guide structure is connected to or extends continuously with the first guide structure 213 on the front frame 21, and together engages with a guide key in the fiber optic adapter. In other embodiments, guide structures are provided around both the periphery of the central portion 2227 and the periphery of the main shaft 223. Both guide structures are arranged along the extension path of the first guide structure 213 on the front frame 21, and together with the first guide structure 213 on the front frame 21, form a guide structure for the fiber optic connector plug.

[0221] See Figure 23 、 Figure 24 and Figure 25 The core component of the main housing 22 is the main shaft 223. The main features of the main shaft 223 are concentrated on the front end face and outer surface of the main shaft 223. The front end face 2231 of the main shaft 223 is used to connect with the front frame 21 and the mounting member 221. The front end face 2231 of the main shaft 223 is provided with a protrusion 2232, which extends radially from the inner edge of the front end face 2231 of the main shaft 223 to the outer edge of the front end face 2231 of the main shaft 223.

[0222] In one embodiment, from the front end to the rear end of the main shaft 223, along the axial direction, the second guide structure 2233, the sealing groove 2234, the locking portion 2235, the first sliding guide structure 2236 and the fixing portion 2237 are sequentially provided on the outer surface of the main shaft 223.

[0223] At the position of the front end surface 2231 of the main shaft 223, the second guide structure 2233 is docked with the first guide structure 213 on the front frame 21 (the Figure 3 As shown), and cooperate with the guide key on the optical fiber adapter 200, so as to prevent the relative rotation between the front frame 21 and the main shaft 223.

[0224] In one embodiment, the second guide structure 2233 may be a groove recessed in the radial direction on the outer surface of the main shaft 223, or the second guide structure 2233 may extend through both the inner and outer surfaces of the main shaft 223 (i.e., it may be understood as a notch formed on the main shaft 223). In other embodiments, the second guide structure 2233 may be a protruding structure formed on the outer surface of the main shaft 223. The circumferential and radial dimensions of the second guide structure 2233 may be identical to those of the first guide structure 213. Since both the outer surfaces of the main shaft and the front housing serve as the exterior surfaces of the optical fiber connector plug, the circumferential and radial dimensions of the second guide structure 2233 are designed to be identical to those of the first guide structure 213. This allows the first guide structure 213 and the second guide structure 2233 to visually form a one-piece structure. This ensures a complete appearance consistency between the front housing and the main shaft, facilitating a compact design and enhancing the user experience.

[0225] The sealing groove 2234 is an arc-shaped groove structure surrounding the outer surface of the main shaft 223 . The side of the sealing groove 2234 away from the second guide structure 2233 is a locking portion 2235 . The locking portion 2235 is described in detail below.

[0226] For the convenience of explanation, the outer surface of the main shaft 223 defined in this application refers to the surface that supports the locking portion 2235 , and does not refer to the outer surface of the locking portion 2235 .

[0227] See Figure 23The locking portion 2235 can be an outwardly protruding boss structure integrally formed on the outer surface of the main shaft 223; the locking portion 2235 and the main shaft 223 can also be a separate structure, for example, the locking portion 2235 is sleeved and fixed on the outer surface of the main shaft 223, or is connected to the outer surface of the main shaft 223 by other fixing methods (such as adhesive fixing). The locking portion 2235 can be a closed ring structure surrounding the outer surface of the main shaft 223, which can be understood as a cylindrical boss structure extending continuously in the circumferential direction and a central rotationally symmetrical structure; the locking portion 2235 can also be a non-closed ring structure, for example, one, two, or more locking portions 2235 are provided on the outer surface of the main shaft 223. In the embodiment of two locking portions 2235, the locking portions 2235 can be symmetrically distributed on both sides of the main shaft 223. In the embodiment of multiple locking portions 2235, the locking portions 2235 can be evenly spaced and distributed on the same circumference. The outer surface of the locking portion 2235 may be a smooth surface, such as a cylindrical surface, an arc surface, or a plane surface. The outer surface of the locking portion 2235 may be provided with threads or other microstructures for increasing contact friction, such as a textured structure.

[0228] See Figure 23 and Figure 24 On the side of the locking portion 2235 away from the sealing groove 2234 is a first sliding guide structure 2236. The first sliding guide structure 2236 is used to cooperate with the sliding member 40 to provide installation limit and guidance for the sliding connection of the sliding member 40 on the main shaft 223. The first sliding guide structure 2236 can be a guide rail structure protruding from the outer surface of the main shaft 223, or a guide groove structure recessed into the outer surface of the main shaft 223. The first sliding guide structure 2236 includes a first guide portion 22361 and a first limiting portion 22362. The first limiting portion 22362 is connected to the locking portion 2235. The first guide portion 22361 is connected to the side of the first limiting portion 22362 away from the locking portion 2235. In the circumferential direction, the size of the first guide portion 22361 is smaller than the size of the first limiting portion 22362. A first limiting step 22363 is formed between the first limiting portion 22362 and the outer surface of the main shaft 223. The first limiting step 22363 is used to define the boundary position of the sliding member 40 sliding toward the front end of the main shaft 223. When the sliding member 40 slides to abut the first limiting step 22363, it can no longer slide toward the front end of the main shaft 223. The first guide portion 22361 is connected to the middle portion of the first limiting portion 22362. The first limiting portion 22362 and the first guide portion 22361 form a T-shaped structure. The first guide portion 22361 is a strip-shaped structure extending in the axial direction. In this embodiment, there are two first sliding guide structures 2236, symmetrically distributed on the outer surfaces of the main shaft 223 on opposite sides.

[0229] The side of the first sliding guide structure 2236 away from the locking portion 2235 is the fixing portion 2237, which is used to connect to the fixing seat 224. In this embodiment, the fixing portion 2237 is a threaded structure, which is used to be threadedly connected to the fixing seat 224. The fixing portion 2237 can also be other fixing structures, such as fixing the main shaft 223 and the fixing seat 224 by means of a buckle and a slot.

[0230] See Figure 23 、 Figure 24 and Figure 25 The spindle 223 provided in this application includes a front end A and a tail end B. The front end face 2231 is the end face of the front end A. The second guide structure 2233 and the sealing groove 2234 are provided on the outer surface of the front end A. The inner surface of the front end A is used to connect to the fixing member 222. The inner surface of the spindle 223 is provided with a limit platform 2239, which faces the tail end B. The limit platform 2239 is used to cooperate with the retaining portion 2223 of the elastic retaining arm 2222 on the fixing member 222. The tail end B is used to be fixedly connected to the optical fiber. The tail end B is provided with a through hole 2238, and the through hole 2238 extends through the outer and inner surfaces of the spindle 223.

[0231] In this embodiment, the components assembled on the outer surface of the main shaft 223 include a sealing structure 30, a sliding member 40, a second elastic member 70, a fixing seat 224, a heat shrink tubing 226, and a tail sleeve 225. The sealing structure 30 is an elastic sealing ring that is mounted within the sealing groove 2234 and partially protrudes outside the sealing groove 2234. The portion protruding outside the sealing groove 2234 is used to seal the connection to the fiber optic adapter or dust cap.

[0232] See Figure 26 and Figure 27 In one embodiment, the sliding member 40 is sleeve-shaped and includes a front end 41 and a rear end 43. The inner surface of the sliding member 40 includes a mating surface 42. The mating surface 42 is adjacent to the front end 41 of the sliding member 40 and faces the interior space of the sliding member 40 (which can also be understood as facing the central axis of the sliding member 40). The mating surface 42 includes a first area 421 and a second area 422. The first area 421 is located between the second area 422 and the front end 41 of the sliding member 40. In one embodiment, along the circumferential direction, the first area 421 and the second area 422 are both arc-shaped surfaces. Figure 28 and Figure 29In the radial direction, the vertical distance D1 between the first region 421 and the central axis C3 (which can be understood as the radial dimension of the first region 421) is greater than the vertical distance D2 between the second region 422 and the central axis (which can be understood as the radial dimension of the second region 422). The first region 421 and the second region 422 can be directly connected, or the first region 421 and the second region 422 can be two non-adjacent regions on the mating surface 42, that is, the first region 421 and the second region 422 are spaced apart. In the axial direction, the vertical distances between different positions of the first region 421 and the central axis can be equal (such as Figure 28 In the embodiment shown in the figure), that is, the extending direction of the first region 421 from the front end surface 41 toward the rear end surface 43 on the sliding member 40 is parallel to the central axis. In other embodiments, the vertical distances between different positions of the first region 421 and the central axis may also be different (such as Figure 29 In the embodiment shown in FIG. 4 , an angle A0 is formed between an extension direction of the first region 421 on the sliding member 40 from the front end surface 41 toward the rear end surface 43 and the central axis.

[0233] Specifically, along the axial direction, the mating surface 42 may be stepped (e.g. Figure 28 The matching surface 42 may also be in the form of an inclined surface (such as Figure 29 (See the embodiment shown). The first region 421 and / or the second region 422 are provided with an etched structure; alternatively, the mating surface 42 is provided with a groove (the groove can be provided in the first region 421, the second region 422, or both the first region 421 and the second region 422). The groove is used to mate with the protrusion on the elastic arm. Both the etched structure and the groove on the mating surface structure are conducive to improving the locking force. The configuration of the second region 422 can be the same as that of the first region 421 or different. This application does not impose any restrictions. As long as the second region 422 is closer to the central axis than the first region 421, the first region 421 and the second region 422 can have different shapes.

[0234] See Figure 26 and Figure 27The sleeve-shaped sliding member 40 includes a first plate B1, a second plate B2, a third plate B3, and a fourth plate B4, which are sequentially connected. The first plate B1 and the third plate B3 are arranged opposite each other, and the second plate B2 and the fourth plate B4 are arranged opposite each other. A mating surface 42 is provided on the inner surfaces of the first plate B1 and the third plate B3. In this embodiment, the first plate B1 and the third plate B3 have an outwardly convex arc-shaped structure, and the outer surfaces of the first plate B1 and the third plate B3 are provided with an anti-slip structure. The second plate B2 and the fourth plate B4 have a flat plate structure and are arranged parallel to each other. The distance between the second plate B2 and the fourth plate B4 is less than the maximum distance between the first plate B1 and the third plate B3. When the sliding member 40 is operated, an external force acts on the first plate B1 and the third plate B3. One side of the second plate B2 and the fourth plate B4 can be used to abut other optical fiber connector plugs, thereby achieving a dense arrangement of multiple optical fiber connector plugs and saving space. When the sliding member 40 is connected to the main shaft 223, the second plate B2 and the fourth plate B4 can be in direct contact with the outer surface of the main shaft 223 or connected through a guide structure, and a gap will be formed between the first plate B1 and the third plate B3 and the main shaft 223. This gap can be a locking groove for accommodating the second locking structure of the optical fiber adapter or a receiving space for accommodating the second elastic element 70 and the fixed seat.

[0235] See Figure 28 and Figure 29 The inner surface of the sliding member 40 is also provided with a second sliding guide structure 44, which is used to cooperate with the first sliding guide structure 2236 on the main shaft 223. The second sliding guide structure 44 is located on the inner surfaces of the second plate B2 and the fourth plate B4. The second sliding guide structure 44 includes a second guide portion 441 and a second limiting portion 442. The second limiting portion 441 is located on the side of the second guide portion 442 away from the front end surface 41 of the sliding member 40. The second guide portion 441 is used to cooperate with the first guide portion 22361 on the outer surface of the main shaft 223. The second limiting portion 442 is used to cooperate with the first limiting portion 22362 on the outer surface of the main shaft 223. The second limiting portion 442 forms a second limiting step 4421 on the side of the second limiting portion 442 facing the front end surface of the sliding member 40. The second limiting step 4421 is used to cooperate with the first limiting step 22363 of the first limiting portion 22362 on the main shaft 223 to define the boundary position of the sliding member 40 sliding toward the front end of the main shaft 223. The second limiting portion 442 and the second guide portion 441 form a T-shaped structure. In this embodiment, the second limiting portion 442 and the second guide portion 441 are guide groove structures recessed on the inner surface of the slider 40. In other embodiments, the second limiting portion 442 and the second guide portion 441 may also be guide rail structures protruding from the inner surface of the slider 40. The inner surface of the slider 40 is provided with a stepped positioning surface 45 facing the rear end surface 43 of the slider 40 for positioning the second elastic member 70.

[0236] The second elastic member 70 is elastically connected between the fixing seat 224 and the sliding member 40 . The fixing seat 224 is fixedly connected to the fixing portion 2237 on the outer surface of the main shaft 223 .

[0237] See Figure 30 In one embodiment, the fixing seat 224 includes a front end surface 2241. The inner surface of the fixing seat 224 is provided with a thread 2243. The fixing seat 224 is fixedly connected to the fixing portion 2237 on the main shaft 223 through a threaded fit. The threaded fit structure connects the fixing seat 224 and the main shaft 223, and the axial position of the fixing seat 224 on the main shaft 223 can be adjusted by rotating the fixing seat 224. The front end surface 2241 of the fixing seat 224 is used to abut the second elastic member 70. The outer surface of the fixing seat 224 is provided with a fixing groove 2242, and the fixing groove 2242 is located near the rear end surface of the fixing seat 224.

[0238] See Figure 5 and Figure 6 The fixing groove 2242 is used to securely connect the front end of the tail sleeve 225, which is mounted around the outer periphery of the tail end of the main shaft 223. A heat shrink tubing 226 is provided between the outer surface of the tail end of the main shaft 223 and the tail sleeve 225. The heat shrink tubing 226 overlaps the tail end of the main shaft 223 and the optical fiber 11 outside the main shaft 223, achieving a sealed connection between the main shaft 223 and the optical fiber 11.

[0239] See Figure 31 The dust cap 50 of the optical fiber connector plug 100 provided in this embodiment includes a cap body 51 and an elastic arm 52. The cap body 51 is hollow and has an opening. The elastic arm 52 is formed at the opening of the cap body 51. The cap body 51 has a centrally symmetrical structure and defines a central axis C5. Two elastic arms 52 are disposed on opposite sides of the central axis C5. Axially, a first mating portion 53 and a second mating portion 54 are defined at one end of the elastic arm 52 away from the cap body 51. The first mating portion 53 is located between the second mating portion 54 and the elastic arm 52. The vertical distance K2 between the first mating portion 53 and the central axis C5 is greater than the distance K1 between the second mating portion 54 and the central axis C5.

[0240] In use, the dust cap 50 covers the periphery of the front frame housing 21, and the elastic arm 52 extends into the locking groove formed between the mating surface 42 of the slider 40 and the outer surface of the main housing 22. The elastic arm 52 engages the mating surface 42, causing the first mating portion 53 to abut against the first region 421, and the second mating portion 54 to abut against the second region 422. The mating surface 42 exerts a clamping force on the first and second mating portions 53, 54, securing the dust cap 50 to the optical fiber connector plug 100. To remove the dust cap 50, the slider 40 is moved toward the rear end B of the main shaft 223, causing the first region 421 to separate from the first mating portion 53, and the second region 422 to separate from the second mating portion 54. When the first region 421 and the second mating portion 54 are aligned in the radial direction, the optical fiber connector plug 100 and the dust cap 50 are unlocked.

[0241] The assembly and matching relationship between the components of the optical fiber connector plug 100 provided in the first embodiment is as follows: (describe in a possible assembly sequence, refer to Figure 4 、 Figure 5 and Figure 6 ).

[0242] The rear end of the fixing member 222 is inserted into the interior of the main shaft 223 from the opening at the front end of the main shaft 223. The locking portion 2223 on the elastic locking arm 2222 on the fixing member 222 cooperates with the limiting platform 2239 on the inner surface of the main shaft 223 to achieve a fixed connection between the fixing member 222 and the main shaft 223. The front end of the fixing member 222 is exposed at the front of the main shaft 223. The present application designs the fixing member 222 and the main shaft 223 as a split structure, which is convenient for manufacturing and relatively easy to assemble. In addition, the fixing member 222 is fixedly connected to the main shaft 223 by extending into the internal space of the main shaft 223. The fixing member 222 occupies the internal space of the main shaft 223 and does not increase the outer dimensions of the main shaft 223, which is conducive to a miniaturized design. In other embodiments, the fixing member 222 may also be an integral structure with the main shaft 223, that is, the front end of the main shaft 223 is directly integrally formed into the front end portion of the fixing member 222. Although the manufacturing process of the integral structure is more complicated than that of the split structure, the integral structure of the fixing member 222 and the main shaft 223 has the advantage of being light and thin. "Thin" refers to the radial dimension, because in the radial direction, the fixing member 222 and the main shaft 223 have no overlapping assembly connection parts.

[0243] The optical fiber 11 is passed through the main shaft 223 and the fixing member 222 , and the core 111 at the front end of the optical fiber 11 is inserted into the core fixing hole 1251 of the ferrule 12 , and the core 111 is fixed to the ferrule 12 by curing the glue.

[0244] See Figure 20 and Figure 21, extend the ferrule 12 from the rear end of the mounting piece 221 into and through the mounting piece 221, and achieve the connection and positioning of the ferrule 12 and the mounting piece 221 through the abutment between the first limiting surface 1244 of the first stopping structure 1242 on the ferrule 12 and the second limiting surface 2215 of the second stopping structure 2213 on the inner surface of the mounting piece 221, and the contact between the first plane 1243 of the first limiting structure 1241 on the ferrule 12 and the contact surface 2216 of the second stopping structure 2213 on the mounting piece 221, and then sleeve the first elastic member 60 on the rear section 125 of the ferrule 12.

[0245] The mounting piece 221 on which the ferrule 12 and the first elastic piece 60 are installed is connected to the main shaft 223. Specifically, the threaded portion 2219 at the rear end of the mounting piece 221 is fitted into the external thread 2221 at the front end of the fixing piece 222, so that the mounting piece 221 is fixedly connected to the main shaft 223. In this state, the protrusion 2232 on the front end face 2231 of the main shaft 223 extends into the second incision 2218 on the rear end face of the mounting piece 221, and the first elastic piece 60 abuts between the positioning surface 1245 of the first stopping structure 1242 of the ferrule 12 and the front end face of the fixing piece 222.

[0246] The front frame housing 21 is fitted from one side of the front end of the ferrule 12 to the periphery of the mounting member 221. The second flat surface 2142 of the second limiting structure 214 in the front frame housing 21 contacts the first flat surface 1243 of the first limiting structure 1241 of the ferrule 12. In this position, the second flat surface 2142 of the front frame housing 21 and the contact surface 2216 of one of the second retaining structures 2213 of the mounting member 221 are coplanar. The second flat surface 2142 of the front frame housing 21 and the contact surface 2216 of the other second retaining structure 2213 of the mounting member 221 are positioned on opposite sides of the ferrule 12. The elastic hooks 2212 on the mounting member 221 engage the retaining holes 215 on the front frame housing 21, completing the secure connection between the front frame housing 21 and the mounting member 221. In this state, the protrusion 2232 on the front end face 2231 of the spindle 223 extends into the first notch 216 on the rear end face of the front frame housing 21, thereby circumferentially positioning the front frame housing 21 and the spindle 223. The rear end face 212 of the front frame housing 21 and the rear end face 2214 of the mounting member 221 are coplanar, and the first notch 216 and the second notch 2218 are radially opposite. The protrusion 2232 on the spindle 223 engages with both the first notch 216 and the second notch 2218.

[0247] The front end face 121 of the ferrule 12 is flush with the front end face 211 of the front frame housing 21, or, in the axial direction, is located between the front end face 211 and the rear end face 213 of the front frame housing 21. Alternatively, it can be understood that the vertical projection of the front end face 121 of the ferrule 12 onto the front frame housing 21 is located on the front end face 211 of the front frame housing 21 or on the inner surface of the front frame housing 21.

[0248] See Figure 5 and Figure 6 , the front end of the slider 40 is directed toward the rear end of the main shaft 223 (the optical fiber will pass through the slider 40), and the slider 40 is placed on the outer surface of the main shaft 223. The second sliding guide structure 44 on the inner surface of the slider 40 cooperates with the first sliding guide structure 2236 on the outer surface of the main shaft 223 to achieve the positioning of the slider 40 and the main shaft 223 in the circumferential direction. In this embodiment, the second sliding guide structure is a groove structure. Figure 6 The position indicated by the lead line of the middle number 44 is the inner wall of the groove, and the first sliding guide structure 2236 is accommodated in the groove. Figure 28 and Figure 29 The position between the sliding member 40 and the main shaft 223 is limited in the axial direction by the cooperation of the second limiting step 4421 of the second limiting portion 442 of the sliding member 40 and the first limiting step 22363 of the first limiting portion 22362 on the outer surface of the main shaft 223.

[0249] The second elastic member 70 is sleeved on the main shaft 223 , and one end of the second elastic member 70 is installed in the space between the sliding member 40 and the main shaft 223 and abuts against the stepped positioning surface 45 on the inner surface of the sliding member 40 .

[0250] The fixing seat 224 is mounted on the fixing portion 2237 of the main shaft 223, with the front end of the fixing seat 224 abutting against the other end of the second elastic member 70, and the fixing seat 224 partially extending into the space between the sliding member 40 and the main shaft 223. In this state, the second elastic member 70 is in a compressed state, and its elastic force pushes the sliding member 40 to the first position, that is, the position where the second limiting step 4421 of the second limiting portion 442 of the sliding member 40 and the first limiting step 22363 of the first limiting portion 22362 on the outer surface of the main shaft 223 are aligned.

[0251] The sliding member 40 can slide between a first position and a second position. The second position can be determined by a limiting structure on the main shaft 223. The second position may not be determined, as long as it is located on the side away from the ferrule in the axial direction of the first position. Figure 5The slider 40 and the locking portion 2235 on the main shaft 223 together form a first locking structure L1. The first locking structure L1 is used to cooperate with the second locking structure on the fiber optic adapter 200 to secure the fiber optic connector plug 100 to the fiber optic connector plug. When the slider 40 is in the first position, the slider 40 and the locking portion 2235 cooperate to lock the second locking structure. When the slider 40 is in the second position, the locking portion 2235 and the second locking structure are unlocked. A locking groove 47 is formed between the mating surface 42 of the slider 40 and the outer surface of the main housing 22. The locking groove 47 is configured to engage with the elastic arm of the second locking structure. The opening of the locking groove 47 is located between the front end surface 41 of the slider 40 and the outer surface of the main housing 22. It can be understood that the mating surface 42 is the inner wall of the locking groove 47. The mating surface 42 faces the main housing 22. The first region 421 is located between the second region 422 and the opening of the locking groove. The vertical distance between the first region 421 and the main housing 22 is greater than the vertical distance between the second region 422 and the main housing 22. When the slider 40 is in the first position, the first region 421 is opposite the locking portion 2235, and the second region 422 is opposite the outer surface of the main housing 22. When the slider 40 is in the second position, the mating surface 42 (including the first region 421 and the second region 422) is opposite the outer surface of the main housing 22.

[0252] After the sliding member 40 and the fixing seat 224 are installed on the main shaft 223, the position of the optical fiber is adjusted. The through hole 2238 at the tail end B of the main shaft 223 corresponds to the exposed part of the reinforcement layer 112 of the optical fiber 11, and glue is applied at the through hole 1128 at the tail end B of the main shaft 223 to fix the reinforcement layer 112 of the optical fiber 11 to the inner surface of the main shaft 223 by glue. The present application fixes the optical fiber by glue by providing a through hole 2238 for glue filling at the tail end B of the main shaft 223. Since the glue fills the gap between the reinforcement layer 112 and the main shaft 223, the surface structure of the reinforcement layer 112 itself is also utilized. The surface of the reinforcement layer 112 has glue filling space, so that the glue can fully contact the optical fiber 11 and the main shaft 223, thereby improving the fixing effect. Moreover, by removing part of the material on the main shaft 223 and fixing the optical fiber inside the main shaft 223, the external space of the main shaft is not occupied, which is conducive to miniaturized design. Moreover, the glue is filled between the main shaft 223 and the optical fiber 11, which can also achieve a sealed connection between the two, and the setting of the through hole will not cause a poor sealing effect. In order to ensure the sealing effect, the heat shrink tube 226 is sleeved on the tail end B of the main shaft 223, so that part of the heat shrink tube 226 is fixed on the outer surface of the tail end of the main shaft 223, and the other part of the heat shrink tube 226 is fixed on the outer layer 113 of the part of the optical fiber 11 that does not extend into the main shaft 223. The tail sleeve 225 is fixed to the periphery of the heat shrink tube 226, and the front end of the tail sleeve 225 is fixedly connected to the fixing groove 2242 at the rear end of the fixing seat 224. The outer surface of the tail sleeve 225 can be engraved with a one-dimensional barcode by molding, laser marking and other technologies for visual identification.

[0253] The sealing structure 30 is positioned within the sealing groove 2234. When the fiber optic connector plug 100 is inserted into the fiber optic adapter 200, the sealing ring seals the connection between the main shaft 223 and the inner surface of the fiber optic adapter 200. The fiber optic connector plug 100 provided in this embodiment is for outdoor use and meets sealing requirements. The front end of the main shaft 223 provided in this application extends into the fiber optic adapter 200, achieving a seal through the sealing structure 30. The rear end of the main shaft 223 is sealed to the optical fiber through the heat shrink tubing 226. Thus, only the first level of sealing structure 30 is required at the front end of the main shaft 223 to achieve a sealed connection between the fiber optic connector plug 100 and the fiber optic adapter 200.

[0254] The fiber optic adapter 200 that matches the fiber optic connector plug 100 provided in the first embodiment is described in detail as follows.

[0255] See Figure 32 and Figure 33The optical fiber adapter 200 includes a main sleeve 201 and a ferrule sleeve 202. The ferrule sleeve 202 is connected to the interior of the main sleeve 201 and can be integrally formed with the main sleeve 201. The main sleeve 201 includes a first end face 2011 and a second end face 2012. A first accommodating space 2013 is formed within the main sleeve 2011, located inside the first end face 2011, and a second accommodating space 2014 is formed inside the second end face 2012. The first end face 2011 has a first opening connecting the first accommodating space 2013 to the outside world, and the second end face 2012 has a second opening connecting the second accommodating space 2014 to the outside world. A ferrule accommodating space 2022 is defined within the ferrule sleeve 202, which communicates between the first accommodating space 2013 and the second accommodating space 2014. The first receiving space 2013 is used to accommodate one optical fiber connector plug 100, and the second receiving space 2014 is used to accommodate another optical fiber connector plug 100. The ferrule receiving space 2022 within the ferrule sleeve 202 is used to accommodate the ferrules of both optical fiber connector plugs. In the optical fiber adapter 200 provided in this embodiment, the first receiving space 2013 is used to plug in an outdoor optical fiber connector plug (i.e., the optical fiber connector plug 100 provided in the first embodiment), and the second receiving space 2014 is used to plug in an indoor optical fiber connector plug. The internal structure of the second receiving space 2013 and the specific structure of the indoor optical fiber connector plug are not limited in this application.

[0256] The main sleeve 201 includes a main body 203 and a second locking structure L2. The second locking structure L2 is disposed at one end of the main body 203 and is located at the first opening of the first accommodating space 2013 that communicates with the outside world. The second locking structure L2 includes a latching slot 204 and an elastic arm 205. The elastic arm 205 is connected to one end of the main body 203. The main body 203 is axially located between the ferrule sleeve 202 and the elastic arm 205. The latching slot 204 is located on the inner surface of the main sleeve 201. In the optical fiber connector plug 100, the elastic arm 205 extends from one end of the main body 203 along the axial direction of the main sleeve 201. The elastic arm 205 includes a first section 2051 and a second section 2052. The first section is connected between the second section 2052 and the main body 203. The outer surface of the elastic arm 205 is the surface of the elastic arm 205 facing away from the first accommodating space 2013.

[0257] See Figure 33, a perpendicular distance R1 between the outer surface of the first section 2051 and the central axis C6 of the main sleeve 201 is greater than a perpendicular distance R2 between the outer surface of the second section 2052 and the central axis C6 of the main sleeve 201. Specifically, a portion of the retaining groove 204 is located on the inner surface of the main body 203, and a portion of the retaining groove 204 is located on the inner surface of the elastic arm 205 (specifically, the inner surface of the first section 2051). In the radial direction of the main sleeve 201, the first section 2051 is directly opposite a portion of the retaining groove 204, and the second section 2052 is located on the periphery of the retaining groove 204.

[0258] In one embodiment, Figure 33 As shown, the outer surface of the elastic arm 205 is stepped, that is, a step surface is formed between the first section 2051 and the second section 2052. Figure 34 As shown, the extension direction from the main body 203 to the end of the second section 2052 away from the main body 203 is the extension direction of the elastic arm 205, and the extension direction of the elastic arm 205 forms an angle A6 with the axial direction of the main sleeve 201. Figure 34 It schematically shows that the elastic arm 205 extends obliquely compared to the axial direction. The specific inclination angle A6 can be set according to the relevant features (ie, the mating surface) on the sliding member of the specific optical fiber connector plug.

[0259] In one embodiment, the outer surface of the first section 2051 and / or the outer surface of the second section 2052 is provided with an etched structure; or, the outer surface of the elastic arm 205 is provided with a protrusion, which is used to cooperate with the groove on the sliding part 40 of the optical fiber connector plug 100.

[0260] See Figure 33 and Figure 34A guide key 206 is provided on the inner surface of the main body 203 of the main sleeve 201. In this embodiment, the guide key 206 is protruded toward the first receiving space 2013. The guide key 206 is used to cooperate with the first guide structure 213 on the front frame sleeve 21 to provide guidance during the insertion of the optical fiber connector plug 100 into the optical fiber adapter 200. A first slot 207 is formed between the main sleeve 201 and the ferrule sleeve 202. The first slot 207 is used to accommodate the front frame 21 in the optical fiber connector plug 100. The optical fiber adapter 200 provided in the present application achieves matching between the optical fiber adapter 200 and the optical fiber connector plug 100 through the first slot 207 between the main sleeve 201 and the ferrule sleeve 202 and the front frame 21 of the optical fiber connector plug 100, the contact and matching between the inner surface of the main sleeve 201 and the outer surface of the front frame 21, and the guide key 206 for matching with the first guide structure 213 on the front frame 21. The optical fiber adapter 200 has a simplified structure. The first slot 207 and the inner surface of the main sleeve 201 already achieve alignment of the inserted optical fiber connector plug 100. The radial dimension can be designed to match the front frame 21 of the optical fiber connector plug 100, which has the advantage of a small size.

[0261] See Figure 35 The fiber optic adapter 200 provided herein also includes a ceramic sleeve 208, which is mounted within the ferrule sleeve 202. The ceramic sleeve 208 has a cutout 2082 extending axially from one end of the ceramic sleeve 208 to the other. The provision of the cutout 2082 allows for an adjustable radial dimension of the ceramic sleeve 208, thereby achieving a tight fit between the ceramic sleeve 208 and the ferrule sleeve 202. The interior of the ceramic sleeve 208 is used to accommodate the ferrule.

[0262] Figure 36 This is a cross-sectional diagram of the optical fiber connector plug 100 and the corresponding optical fiber adapter 200 provided in the first embodiment after being plugged into each other. Figure 37 for Figure 36 An enlarged schematic diagram of part I in FIG. Figure 38 for Figure 36 Enlarged schematic diagram of part II.

[0263] Figure 39 This is another cross-sectional view of the optical fiber connector plug 100 provided in the first embodiment and the corresponding optical fiber adapter 200 after being plugged into each other. Figure 40 for Figure 39 An enlarged schematic diagram of part III in FIG.

[0264] Figure 36As can be seen in FIG, the sealing structure 30 realizes a sealed connection between the optical fiber connector plug 100 and the corresponding optical fiber adapter 200 inside the optical fiber adapter 200 .

[0265] like Figure 38 As shown, after the optical fiber connector plug 100 and the optical fiber adapter 200 are plugged into each other, the front frame 21 of the optical fiber connector plug 100 is inserted into the first slot 207 , the ferrule 12 is inserted into the ferrule sleeve 202 and surrounded by the ceramic sleeve 208 , and the outer surface of the front frame 21 contacts the inner surface of the main body sleeve 201 .

[0266] Figure 36 The figure shows the locked state of the optical fiber connector plug 100 and the optical fiber adapter 200 after being plugged in. Figure 37 As shown, the sliding member 40 is in the first position, the locking portion 2235 of the optical fiber connector plug cooperates with the card slot 204 of the optical fiber adapter, the first area 421 of the mating surface 42 abuts against the first section 2051 of the elastic arm 205, and the second area 422 of the mating surface 42 abuts against the second section 2052 of the elastic arm 205, realizing a double-step locking structure.

[0267] Figure 39 The figure shows the unlocked state after the optical fiber connector plug 100 and the optical fiber adapter 200 are plugged in. Figure 40 As shown, the slider 40 is in the second position, with the first region 421 of the mating surface 42 positioned around the second section 2052 of the elastic arm 205. There is no abutment between the first region 421 and the second section 2052. The first region 421 and the second section 2052 are separated from each other, with a gap formed therebetween. The second region 422 faces the outer surface of the main shaft 223 of the optical fiber connector plug 100. Due to the gap formed between the mating surface 42 and the elastic arm 205, the elastic arm 205 can be opened. Therefore, at this point, even though the locking portion 2235 of the optical fiber connector plug is located within the slot 204 of the optical fiber adapter, the optical fiber connector plug 100 can still be removed from the optical fiber adapter 200.

[0268] The optical fiber connector plug provided by the second embodiment is described in detail as follows.

[0269] Figure 41 FIG. 1 is a perspective view of a fiber optic connector plug 100 ′ provided in a second embodiment. Figure 42 FIG2 is a perspective exploded view of a fiber optic connector plug 100' provided in a second embodiment. Figure 41 and Figure 42The fiber optic connector plug 100' includes an optical fiber 11', a ferrule 12', a front frame 21', a mounting member 221', a main shaft 223', a tail sleeve 225', a heat shrink tubing 226', a sealing structure 30', a sliding member 40', and a first elastic member 60'. A locking portion 2235' is provided on the main shaft 223'. The locking portion 2235' and the sliding member 40' form a first locking structure L1'.

[0270] The optical fiber connector plug 100' provided in the second embodiment differs from the optical fiber connector plug 100 provided in the first embodiment in the structure of the main shaft 223' and the structure of the sliding member 40'. The structural features of the main shaft 223' that differ from those of the optical fiber connector plug 100 provided in the first embodiment are described in detail below.

[0271] See Figure 43 and Figure 44 The optical fiber connector plug 100' provided in this embodiment does not include the structure of the fixing part 222 independent of the main shaft in the optical fiber connector plug 100 provided in the first embodiment. It can be understood that this embodiment integrates structural features with similar fixing part functions on the main shaft 223', that is, a protruding ring structure 222' is provided at the inner edge of the front end face 2231' of the main shaft 223' and is integrally formed to the inner surface of the main shaft 223', and the outer surface of the protruding ring structure 222' is provided with threads for connecting to the mounting part 221'.

[0272] The locking portion 2235', provided on the outer surface of the main shaft 223', is located on the side of the sealing groove 2234' away from the front end surface 2231'. The locking portion 2235' includes an elastic arm 22351 and a clamping block 22352. One end of the elastic arm 22351 is fixedly connected to the outer surface of the main shaft 223'. Specifically, one end of the elastic arm 22351 and the main shaft 223' are integrally formed. Only one end of the elastic arm 22351 is connected to the main shaft 223', while the rest of the elastic arm is suspended relative to the main shaft 223'. A gap 22353 is defined between the elastic arm 22351 and the main shaft 223'. The clamping block 22352 is fixedly connected to the other end of the elastic arm 22351. The end of the elastic arm 22351 connected to the main shaft 223' is the connecting end, and the clamping block 22352 is located on the elastic arm 22351 away from the connecting end. The locking block 22352 protrudes from the surface of the elastic arm 22351 facing away from the main shaft 223'. There are two locking portions 2235', which are symmetrically distributed on opposite sides of the main shaft 223'.

[0273] The outer surface of the main shaft 223' is also provided with a retaining structure 701, which is used to cooperate with the sliding member 40' to retain the sliding member 40' in the first position. Specifically, the retaining structure 701 is a stopper protruding from the outer surface of the main shaft 223'. There are two retaining structures 701, which are spaced apart, forming a retaining groove 702 between the two retaining structures 701.

[0274] See Figure 45 、 Figure 46 、 Figure 47 and Figure 48 The sliding member 40' includes a sliding body 403 slidably connected to the main shaft 223' and a stopper 404 connected to one end of the sliding body 403. The sliding body 403 is sleeve-shaped, and the stopper 404 extends from the inner surface of one end of the sliding body 403. The stopper 404 has an arc-shaped sheet structure and can slide into the gap 22353. There are also two stoppers 404, symmetrically distributed on opposite sides of the sliding body 403. The sliding member 40' includes a sliding positioning structure 405, which includes a connecting portion 4051 connected to the sliding body 403 and a protruding block structure 4052 protruding from the connecting portion 4051. The connecting portion 4052 is formed by providing a pair of strip-shaped slits 4031 on the sliding body 403. The setting of the slits 4031 makes it easy for the connecting portion 4052 to produce radial elastic deformation under the action of external force. The protruding block structure 4052 is used to cooperate with the locking structure 701 on the main shaft. Specifically, when the protruding block structure 4052 is locked in the limiting groove 702, the sliding member 40' can be limited to the first position.

[0275] When the sliding member 40 ′ is connected to the main shaft 223 ′, the inner surface of the sliding body 403 of the sliding member 40 ′ contacts the inner surface of the main shaft 223 ′.

[0276] An optical fiber adapter 200 ′ is provided for matching with the optical fiber connector plug 100 ′ provided in the second embodiment.

[0277] See Figure 49 and Figure 50 Fiber optic adapter 200' includes a main sleeve 201' and a ferrule sleeve 202'. Main sleeve 201' is provided with a second locking structure L2'. Fiber optic adapter 200' differs from fiber optic adapter 200 in that the second locking structure L2' of fiber optic adapter 200' is different from the second locking structure L2 of fiber optic adapter 200.

[0278] The second locking structure L2' is a snap groove formed on the inner surface of the main body sleeve 201, and the snap groove includes a limiting groove 2016 recessed on the inner surface of the main body and a groove or hole 2017 located at the bottom of the limiting groove 2016. The limiting groove 2016 is used to cooperate with the elastic arm 22351 of the locking part 2235' on the optical fiber connector plug 100', and the groove or hole 2017 is used to cooperate with the card block 22352 of the locking part 2235' on the optical fiber connector plug 100'.

[0279] See Figure 51 、 Figure 52 and Figure 53 , Figure 51 FIG. 1 is a schematic diagram showing the optical fiber connector plug 100 ′ and the optical fiber adapter 200 ′ being plugged in. Figure 52 for Figure 51 The enlarged schematic diagram of part IV, Figure 52 FIG. 1 is a schematic diagram showing the optical fiber connector plug 100 ′ and the optical fiber adapter 200 ′ in a locked state. Figure 53 FIG. 1 is a schematic diagram showing the optical fiber connector plug 100 ′ and the optical fiber adapter 200 ′ in an unlocked state.

[0280] like Figure 52 As shown, after the fiber optic connector plug 100' is inserted into the fiber optic adapter 200', the elastic arm 22351 of the locking portion 2235' is located in the limiting groove 2016, and the locking block 22352 is locked in the groove or hole 2017. By sliding the slider 40', the retaining portion 404 slides into the gap 22353. In this state, the retaining portion 404 can abut the elastic arm 22351, holding the locking block 22352 in the groove or hole 2017, thereby locking the fiber optic connector plug 100' and the corresponding fiber optic adapter 200'.

[0281] like Figure 53 As shown, by sliding the sliding member 40', the blocking portion 404 leaves the gap 22353. In this state, due to the existence of the gap 22353 between the elastic arm 22351 and the main shaft 223', the elastic arm 22351 swings into the gap 22353 under the action of its own elastic deformation, so that the block 22352 leaves the slot or hole 2017 to achieve unlocking.

[0282] The optical fiber connector plug provided in the third embodiment is described in detail as follows.

[0283] Figure 54 FIG. 1 is a perspective view of an optical fiber connector plug 100 provided in a third embodiment. Figure 55 The figure shows a perspective exploded view of the optical fiber connector plug 100 provided in the third embodiment. Figure 54 and Figure 55 The optical fiber connector plug 100" includes an optical fiber 11", a ferrule 12", a front frame sleeve 21", a mounting part 221", a main shaft 223", a tail sleeve 225", a heat shrink sleeve 226", a sealing structure 30", a sliding part 40", and a first elastic part 60". A locking part 2235" is provided on the main shaft 223", and the locking part 2235" and the sliding part 40" constitute a first locking structure L1".

[0284] The optical fiber connector plug 100 ″ provided in the third embodiment differs from the optical fiber connector plug 100 ′ provided in the second embodiment in the structure of the main shaft 223 ″, the structure of the locking portion 2235 ″, and the structure of the sliding member 40 ″.

[0285] See Figure 56 The difference between the main shaft 223" provided by this embodiment and the main shaft 223' of the optical fiber connector plug 100' provided by the second embodiment is that: there is no integrated locking portion provided on the main shaft 223", and the locking portion 2235" in this embodiment and the main shaft 223" are of a split structure. The outer surface of the main shaft 223" is provided with a connecting portion 22354 for connecting the locking portion 2235", and the connecting portion 22354 is a protruding block structure protruding from the outer surface of the main shaft 223". The specific shape of the connecting portion 22354 may be square, circular, triangular, polygonal, etc., which is not limited by this application. There are two connecting portions 22354, which are symmetrically distributed on both sides of the main shaft 223".

[0286] See Figure 57 、 Figure 58 and Figure 59 The locking portion 2235" has a sleeve-like structure, and the inner surface of the locking portion 2235" is provided with a positioning groove 22355, a locking groove 22356 and a buckle hole 22357. The positioning groove 22355 is used to cooperate with the outer surface connecting portion 22354 of the main shaft 223" to fix the locking portion 2235" to the main shaft 223". There are two positioning grooves 22355, which are symmetrically distributed on both sides of the central axis of the locking portion 2235". The button hole 22357 is located at the bottom of the locking groove 22356, and the button hole 22357 is a through hole structure, so that the inner and outer surfaces of the locking part 2235" are connected. The extension direction of the locking groove 22356 is the axial direction of the locking part 2235", and the opening of the locking groove 22356 is formed at one end face of the locking part 2235". The number of the button holes 22357 and the locking groove 22356 are both two, which are symmetrically distributed on the other two sides of the central axis of the locking part 2235".

[0287] During assembly, the locking portion 2235" is sleeved on the main shaft 223", so that the connecting portion 22354 is inserted into the positioning groove 22355 to realize the connection between the locking portion 2235" and the main shaft 223". In this state, a receiving space is formed between the bottom wall of the locking groove 22356 and the main shaft 223". The locking portion 2235" at the bottom wall position of the locking groove 22356 constitutes a locking arm. It can be understood that the buckle hole 22357 is provided on the locking arm, and the buckle hole 22357 can be a card slot or a card hole structure. The receiving space is formed between the locking arm and the outer surface of the main shaft 223". The receiving space is used to accommodate the second locking structure of the optical fiber adapter, and the buckle hole 22357 is used to cooperate with the second locking structure.

[0288] See Figure 60 The structure of the sliding member 40' provided in this embodiment can be the same as the structure of the sliding member 40' in the optical fiber connector plug 100' provided in the second embodiment. The sliding member 40' is slidably connected to the main shaft 223'. The sliding member 40' includes a sliding body 403' and a resisting portion 404' connected to one end of the sliding body 403'. The resisting portion 404' can be moved into the receiving space and resist the second locking structure of the optical fiber adapter.

[0289] An optical fiber adapter 200" that matches the optical fiber connector plug 100" provided in the third embodiment.

[0290] See Figure 61 and Figure 62 The optical fiber adapter 200" includes a main body sleeve 201" and a ferrule sleeve 202", and the main body sleeve 201" is provided with a second locking structure L2". The difference between the optical fiber adapter 200" and the optical fiber adapter 200 is that the second locking structure L2" of the optical fiber adapter 200" is different from the second locking structure L2 of the optical fiber adapter 200.

[0291] In one embodiment, the second locking structure L2" includes a snap portion 2019 and a connecting section 2018, and the connecting section 2018 is connected between the snap portion 2019 and the end face 2011" of the main sleeve 201", and the snap portion 2019 is protrudingly arranged on the surface of the connecting section 2018 away from the central axis of the main sleeve 201", and the connecting section 2018 is used to extend into the receiving space between the locking arm and the main shaft 223" on the optical fiber connector plug 100", that is, the connecting section 2018 is used to cooperate with the locking groove 22356, and the snap portion 2018 is used to cooperate with the buckle hole 22357.

[0292] See Figure 63 、 Figure 64 and Figure 65 , Figure 63Schematic diagram of the optical fiber connector plug 100" and the optical fiber adapter 200" plugged in. Figure 64 for Figure 63 The enlarged schematic diagram of the V part in the middle, Figure 64 Schematic diagram of the optical fiber connector plug 100" and the optical fiber adapter 200" in a locked state. Figure 65 FIG. 1 is a schematic diagram showing the optical fiber connector plug 100 ″ and the optical fiber adapter 200 ″ in an unlocked state.

[0293] like Figure 64 As shown, during the insertion of the optical fiber connector plug 100″ into the optical fiber adapter 200″, the second locking structure L2″ of the optical fiber adapter 200″ is aligned with the opening of the locking groove 22356 formed on one end surface of the locking portion 2235″. The optical fiber connector plug 100″ is then inserted into the optical fiber adapter 200″ so that the connecting section 2018 extends into the locking groove 22356 and the latch portion 2019 is located at the position of the latch hole 22357. The slider 40″ is then slid so that the retaining portion 404′ slides into the gap between the connecting section 2018 and the main shaft 223″. In this state, the retaining portion 404′ can abut the connecting section 2018 and the latch portion 2019 abuts against the latch hole 22357, thereby achieving locking between the optical fiber connector plug 100″ and the corresponding optical fiber adapter 200″.

[0294] like Figure 65 As shown, by sliding the sliding member 40", the blocking portion 404' leaves the gap between the connecting section 2018 and the main shaft 223". In this state, the connecting section 2018 swings toward the side of the main shaft 223" under the action of its own elastic deformation, so that the locking portion 2019 can be disengaged from the buckle hole 22357 to achieve unlocking.

[0295] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A fiber optic connector plug, characterized in that: include: optical fiber; a ferrule fixed to the front end of the optical fiber; The main housing is in a sleeve shape and is sleeved around the outer periphery of the optical fiber; A front frame sleeve is fixed to one end of the main housing and surrounds the ferrule. The end face of the ferrule away from the optical fiber is the front end face of the ferrule, and the end face of the front frame sleeve away from the main housing is the front end face of the front frame sleeve. The front end face of the ferrule is flush with the front end face of the front frame sleeve, or the front end face of the ferrule is located between the front end face and the rear end face of the front frame sleeve in the axial direction, and the rear end face of the front frame sleeve is the end face of the front frame sleeve facing the main housing. The front frame sleeve is a single-layer sleeve structure, and has an outer surface in the radial direction. The outer surface of the front frame is the outer surface of the optical fiber connector plug, and a slot is formed between the inner surface of the front frame and the ferrule. The slot is used to accommodate the ferrule sleeve of the optical fiber adapter, so that the end face of the ferrule sleeve is located in the slot, the radial size of the ferrule sleeve matches the radial size of the slot, and the ferrule is used to be inserted into the ferrule sleeve. The outer surface of the front frame is provided with a first guide structure, and the first guide structure is used to cooperate with the guide key on the optical fiber adapter. The first guide structure extends along the axial direction.

2. The optical fiber connector plug according to claim 1, wherein: In the radial direction: the first guide structure is a groove structure provided on the outer surface of the front frame cover; or the first guide structure passes through the inner and outer surfaces of the front frame cover; or the first guide structure is protrudingly provided on the outer surface of the front frame cover.

3. The optical fiber connector plug according to claim 1, wherein: A second guide structure is provided on the outer surface of the main housing. The second guide structure is connected to the first guide structure and is used together to cooperate with the guide key on the optical fiber adapter.

4. The optical fiber connector plug according to claim 1, wherein: The front end surface of the front frame sleeve is a closed annular structure; or, A notch is provided at one end of the front frame cover close to the front end surface of the front frame cover, so that the front end surface of the front frame cover forms an unclosed continuously extended surface; or One end of the front end surface close to the front frame cover is provided with two oppositely arranged notches, so that the front end surface of the front frame cover is formed between the two notches.

5. The optical fiber connector plug according to claim 1, wherein: A first limiting structure is provided on the surface of the ferrule, and a second limiting structure is provided on the inner surface of the front frame. The first limiting structure cooperates with the second limiting structure to prevent relative rotation between the ferrule and the front frame.

6. The optical fiber connector plug according to claim 5, wherein: The first limiting structure includes a first plane, the second limiting structure is protruded from the inner surface of the front frame, the second limiting structure includes a second plane facing the insert, and the first plane is in contact with the second plane.

7. The optical fiber connector plug according to claim 1, wherein: The main shell includes a main shaft and a mounting piece, both of which are in the shape of a sleeve. The mounting piece is connected to one end of the main shaft facing the front frame sleeve. A first stopping structure is provided on the outer surface of the insert. The mounting piece includes a mounting piece body and a second stopping structure. The second stopping structure is located at the front end of the mounting piece body and protrudes from the inner surface of the mounting piece body. Part of the insert is accommodated inside the mounting piece, and the first stopping structure cooperates with the second stopping structure to prevent the insert from moving out of the mounting piece from the front end of the mounting piece body. The front frame sleeve is sleeved on the outer surface of the mounting piece and fixedly connected to the mounting piece.

8. The optical fiber connector plug according to claim 7, wherein: The mounting member further includes an elastic hook formed at the front end of the mounting member body. The front frame cover is provided with a slot or a hole. The elastic hook cooperates with the slot or the hole to achieve a fixed connection between the mounting member and the front frame cover.

9. The optical fiber connector plug according to claim 7, wherein: The rear end surface of the mounting member body and the rear end surface of the front frame sleeve are coplanar and jointly form a docking surface, and the docking surface is docked with the end surface of the main shaft.

10. The optical fiber connector plug according to claim 9, wherein: A positioning structure is provided at the joint between the joint surface and the front end surface of the main shaft, and the positioning structure is used to: position the main housing and the front frame sleeve in the circumferential direction, and / or position the main housing and the mounting member in the circumferential direction.

11. The optical fiber connector plug according to claim 10, wherein: A first cutout is provided on the rear end surface of the front frame sleeve, and a second cutout is provided on the rear end surface of the mounting body. The first cutout and the second cutout are opposite to each other in the radial direction. A protrusion is provided on the end surface of the main shaft, and the protrusion cooperates with the first cutout and the second cutout.

12. The optical fiber connector plug according to any one of claims 1 to 11, characterized in that: The outer surface of the main shell is provided with a sealing structure and a first locking structure. Along the axial direction, the sealing structure is located between the front frame sleeve and the first locking structure. The first locking structure is used to cooperate with the second locking structure of the optical fiber adapter, and the sealing structure is used for sealing connection of the inner surface of the optical fiber adapter.

13. The optical fiber connector plug according to claim 1, wherein: The main shell includes a sleeve-shaped main shaft, which includes opposite front and tail ends. The front end of the main shaft is connected to the front frame sleeve, the optical fiber is accommodated in the main shaft, and the tail end is fixedly connected to the optical fiber. A through hole is provided at the tail end, and the through hole passes through the outer surface and the inner surface of the main shaft. The through hole is used to fill glue between the optical fiber and the inner surface of the main shaft.

14. The optical fiber connector plug according to claim 13, wherein: The optical fiber includes a fiber core, a reinforcement layer wrapped around the fiber core, and an outer layer wrapped around the reinforcement layer. Part of the fiber core extends out of the reinforcement layer and is fixedly connected to the ferrule, and part of the reinforcement layer is not wrapped by the outer layer. The glue is used to fix the reinforcement layer and the main axis.

15. An optical fiber adapter, characterized in that: It includes a main body sleeve and a core sleeve, the core sleeve is connected to the inside of the main body sleeve, and the main body sleeve is provided with a first accommodating space connected to the internal space of the core sleeve, the first accommodating space is used to accommodate the optical fiber connector plug according to any one of claims 1 to 14, the core sleeve is used to accommodate the core of the optical fiber connector plug, the inner surface of the main body sleeve is used to contact the outer surface of the front frame sleeve of the optical fiber connector plug, and a first slot is formed between the main body sleeve and the core sleeve, and the first slot is used to accommodate part of the front frame sleeve.

16. An optical fiber adapter, characterized in that: The optical fiber connector of claim 1 or 2 is configured to have a first accommodating space therein that is connected to the inner space of the ferrule sleeve, the first accommodating space being used to accommodate the optical fiber connector plug according to claim 1 or 2, the ferrule sleeve being used to accommodate the ferrule of the optical fiber connector plug, the inner surface of the main body sleeve being used to contact the outer surface of the front frame sleeve of the optical fiber connector plug, a first slot being formed between the main body sleeve and the ferrule sleeve, the first slot being used to accommodate part of the front frame sleeve, the inner surface of the main body sleeve being provided with a guide key, the extension direction of the guide key being the same as the extension direction of the central axis of the ferrule sleeve, the guide key being used to cooperate with the first guide structure on the front frame sleeve of the optical fiber connector plug.

17. An optical fiber adapter, characterized in that: The optical fiber connector of claim 12 , wherein the ferrule sleeve is configured to extend inside the optical fiber connector and has a first accommodating space connected to the inner space of the ferrule sleeve. The first accommodating space is configured to accommodate the optical fiber connector plug according to claim 12 , the ferrule sleeve is configured to accommodate the ferrule of the optical fiber connector plug. The inner surface of the main body sleeve is configured to contact the outer surface of the front frame sleeve of the optical fiber connector plug. A first slot is formed between the main body sleeve and the ferrule sleeve, and the first slot is configured to accommodate part of the front frame sleeve. The main body sleeve comprises a first end, a second end, and a main body connected between the first end and the second end. The ferrule sleeve is connected to the inside of the main body. The first end is provided with a second locking structure, and the second locking structure is configured to cooperate with the first locking structure of the optical fiber connector plug. The inner surface of the main body is sealed and connected to the sealing structure of the optical fiber connector plug.

18. A connector assembly, characterized in that: The optical fiber connector plug comprises the optical fiber connector plug according to any one of claims 1 to 14 and the optical fiber adapter according to any one of claims 15 to 17.

19. A communication device, characterized in that: The optical fiber adapter comprises a housing and the optical fiber adapter according to any one of claims 15 to 17 connected to the housing, wherein the housing is provided with a socket, the optical fiber adapter is arranged inside the housing, and the socket faces the first accommodation space of the optical fiber adapter.

20. The communication device according to claim 19, wherein There are multiple sockets arranged in a row, and there are multiple fiber optic adapters arranged at corresponding socket positions.

21. The communication device according to claim 19, wherein: There are multiple sockets, which are arranged in at least two rows on the housing. There are also multiple fiber optic adapters, which are arranged at corresponding socket positions.

22. The communication device according to any one of claims 19 to 21, characterized in that: The communication device further comprises a fiber optic connector plug according to any one of claims 1 to 14, wherein the fiber optic connector plug is configured to cooperate with the fiber optic adapter.

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