Double-core optical fiber adapter and optical fiber connecting assembly

Abstract

The utility model discloses a twin-core optical fiber adapter and an optical fiber connection assembly, the twin-core optical fiber adapter comprises an inner adapter and a housing which are clamped and fixed, the inner adapter comprises two slots, at least two lugs and at least two buckles, the slots are used for completing the plugging of an indoor optical fiber connector and an outdoor optical fiber connector, and the buckles are used for clamping and fixing the inner adapter and the housing. The two slots are arranged in the inner adapter side by side, and a ceramic sleeve is arranged in each slot; the at least two lugs are respectively arranged on two opposite outer side surfaces of the inner adapter, the connecting line of the central points of the two lugs which are oppositely arranged intersects with the connecting line of the central points of the two ceramic bushings, and the included angle is 10-90 degrees; the at least two buckles are arranged on the outer side surface of the inner adapter and are clamped and fixed with the clamping part of the shell, and the included angle between the connecting line of the center points of one pair of the at least two buckles and the connecting line of the center points of the two lugs is 20-90 degrees.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic adapters, specifically to a dual-core fiber optic adapter and a fiber optic connection assembly. Background Technology

[0002] With the rapid development of fiber optic communication technology, the demand for high-density fiber optic connections in scenarios such as data centers and 5G networks is increasing daily. LC fiber optic connectors, with their advantages of miniaturization and low loss, are gradually becoming a core component of high-density cabling. As a key supporting component for LC connectors, LC dual-core adapters play an important role in achieving full-duplex communication and increasing port density. Currently, dual-core fiber optic adapters have two side-by-side slots that can simultaneously insert two LC connectors. Symmetrical lugs are located on both sides of the two slots to accommodate buffers when the fiber optic connectors are inserted into the dual-core adapter. However, this design also results in a relatively wide overall size for the dual-core fiber optic adapter, making high-density deployment difficult.

[0003] Therefore, how to reduce the size of dual-core fiber optic adapters, thereby reducing their space occupancy and increasing installation density, has become an urgent technical problem to be solved. Utility Model Content

[0004] Based on the above situation, the main purpose of this utility model is to provide a dual-core fiber optic adapter and fiber optic connection assembly to reduce the size of the dual-core fiber optic adapter, thereby reducing the space occupancy rate of the dual-core fiber optic adapter and increasing the installation density.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, this utility model discloses a dual-core fiber optic adapter, including an inner adapter and a housing, wherein the inner adapter is snap-fitted and fixed to the housing, and the inner adapter includes:

[0007] Two slots are arranged side by side inside the inner adapter, and each slot is provided with a ceramic sleeve. The slots are used for the insertion of indoor fiber optic connectors and outdoor fiber optic connectors.

[0008] At least two lugs are respectively disposed on two opposite outer surfaces of the inner adapter, and the line connecting the center points of the two opposite lugs intersects the line connecting the center points of the two ceramic sleeves, with an included angle of 10° to 90°. ；

[0009] At least two latches are disposed on the outer side of the inner adapter and are engaged and fixed with the snap-fit ​​portion of the outer shell, and the angle between the line connecting a pair of center points of the at least two latches and the line connecting the center points of the two lugs is 20° to 90°.

[0010] Optionally, the lug is disposed on the outer surface of the long side of the radial section of the inner adapter, and the line connecting the center points of the two ceramic sleeves is parallel to the long side of the radial section of the inner adapter.

[0011] Optionally, the buckle and the lug are respectively disposed on different outer sides of the inner adapter.

[0012] Optionally, the angle between the line connecting the center points of the two oppositely arranged lugs and the line connecting the center points of the two ceramic sleeves is 90°, and the angle between the line connecting a pair of center points of the at least two buckles and the line connecting the center points of the two lugs is 90°.

[0013] Optionally, the dual-core fiber optic adapter further includes:

[0014] An elastic element is provided, with one end abutting against the lug and the other end abutting against the inner wall of the housing. When the inner adapter and the housing are engaged, the elastic element is located between the inner adapter and the housing to provide a cushioning effect.

[0015] Optionally, the inner wall of the housing is provided with an axial mounting channel for mounting the elastic element, one end face of the mounting channel is not connected to the end face of the housing, and the other end of the elastic element abuts against one end face of the mounting channel.

[0016] Optionally, the sidewall of the slot is provided with a through hole that penetrates the sidewall of the slot, and a locking step is formed on one side of the through hole, the locking step being used to engage with an indoor fiber optic connector.

[0017] Optionally, the snap-fit ​​portion is a snap-fit ​​groove that penetrates the side wall of the housing.

[0018] Optionally, the lug extends radially outward from the outer side wall of the inner adapter housing, and the outer edge of the lug does not extend radially beyond the circumcircle of the inner adapter housing.

[0019] In a second aspect, embodiments of the present invention disclose an optical fiber connection assembly, comprising: a dual-core optical fiber adapter as described in any one of the first aspects and an outdoor optical fiber connector and / or an indoor optical fiber connector that are connected in conjunction with the dual-core optical fiber adapter.

[0020] Beneficial effects:

[0021] According to the embodiments of this utility model, a dual-core fiber optic adapter and a fiber optic connection assembly are disclosed. The dual-core fiber optic adapter includes an inner adapter and a housing that are snapped together. The inner adapter includes two slots, at least two lugs, and at least two snap fasteners. The slots are used for indoor and outdoor fiber optic connectors to be inserted. The two slots are arranged side by side inside the inner adapter, and each slot is provided with a ceramic sleeve. The at least two lugs are respectively arranged on two opposite outer surfaces of the inner adapter, and the line connecting the center points of the two opposite lugs intersects the line connecting the center points of the two ceramic sleeves, with an included angle of 10° to 90°. The at least two snap fasteners are arranged on the outer surfaces of the inner adapter and are snapped together with the snap-fit ​​part of the housing. The included angle between the line connecting the center points of one pair of the at least two snap fasteners and the line connecting the center points of the two lugs is 20° to 90°. Because the two slots in the inner adapter are arranged side by side, the radial cross-section of the inner adapter is approximately rectangular. By setting the angle between the line connecting the center points of the two lugs and the line connecting the center points of the two ceramic sleeves, the two lugs are positioned along the longer side of the rectangle formed by the radial cross-section of the inner adapter. Since outdoor dual-core fiber optic adapters are typically cylindrical, placing the lugs along the longer side of the inner adapter fully utilizes the space along that side, resulting in a more compact overall structure. This reduces the size of the inner adapter, decreases its volume, and ultimately reduces its space occupancy, increasing installation density.

[0022] Other beneficial effects of this utility model will be explained in detail through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0023] The preferred embodiments of the dual-core fiber optic adapter and fiber optic connection assembly of this utility model will be described below with reference to the accompanying drawings. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a dual-core fiber optic adapter disclosed in this embodiment;

[0025] Figure 2 This is a schematic diagram of the structure of the inner adapter in a dual-core fiber optic adapter disclosed in this embodiment;

[0026] Figure 3 This is a cross-sectional structural diagram of a dual-core fiber optic adapter disclosed in this embodiment;

[0027] Figure 4 This is a partial structural diagram of the inner adapter in another direction of a dual-core fiber optic adapter disclosed in this embodiment;

[0028] Figure 5a This is a schematic diagram of the cylindrical inner cavity cross-section adapted by the inner adapter in a dual-core fiber optic adapter disclosed in this embodiment;

[0029] Figure 5b This is a schematic diagram of the cylindrical inner cavity cross-section adapted by the inner adapter in the prior art disclosed in this embodiment. Detailed Implementation

[0030] The present invention will now be described based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0031] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0032] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0033] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] To reduce the size of the dual-core fiber optic adapter, thereby minimizing its space occupancy and increasing installation density, this embodiment discloses a dual-core fiber optic adapter and fiber optic connection assembly. Please refer to... Figure 1 , Figure 1 This is a schematic diagram of the structure of a dual-core fiber optic adapter disclosed in this embodiment. Figure 1 As shown, the dual-core fiber optic adapter 10 includes an inner adapter 11 and a housing 12, with the inner adapter 11 and the housing 12 snapped together and fixed.

[0035] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the internal adapter in a dual-core fiber optic adapter disclosed in this embodiment. Figure 2 As shown, the internal adapter 11 includes:

[0036] Two slots 111 are arranged side-by-side inside the inner adapter 11. Each slot 111 contains a ceramic sleeve 1111 for connecting the indoor fiber optic connector to the outdoor fiber optic connector. In this embodiment, the two slots 111 are arranged side-by-side inside the inner adapter 11. Specifically, as shown... Figure 2 As shown, two slots 111 are arranged horizontally side by side inside the inner adapter 11, such that the radial shape of the slot 111 in the inner adapter 11 is rectangular. During fiber optic connection, the indoor fiber optic connector enters from the right side of slot 111. Figure 2 Insert the inner adapter 11 (in the direction shown), and the outdoor fiber optic connector is inserted from the left side of slot 111 (as shown). Figure 2 Insert the inner adapter 11 (as shown in the diagram) so that the indoor fiber optic connector and the outdoor fiber optic connector are mated at the position of the ceramic sleeve 1111.

[0037] At least two lugs 112 are respectively disposed on two opposite outer surfaces of the inner adapter 11, and the line connecting the center points of the two opposite lugs 112 intersects the line connecting the center points of the two ceramic sleeves 1111 with an included angle of 10° to 90°. In this embodiment, at least two lugs 112 are respectively disposed on two opposite outer surfaces of the inner adapter 11, the line connecting the center points of the two lugs 112 intersects the line connecting the center points of the two ceramic sleeves 1111, and the included angle between the two lines is greater than or equal to 10° and less than or equal to 90°. (Refer to...) Figure 2 In the direction shown, at least two lugs 112 are located on the upper and lower sides of the ceramic sleeve 1111, that is, on the longer side of the rectangle formed by the radial cross-section of the inner adapter 11. Since outdoor dual-core fiber optic adapters are usually cylindrical, placing the lugs 112 on the longer side of the inner adapter 11 makes full use of the space on the longer side of the inner adapter 11, thereby making the overall structural design of the inner adapter 11 more compact, reducing the size of the inner adapter 11, reducing the volume of the dual-core fiber optic adapter, thereby reducing the space occupied by the dual-core fiber optic adapter and increasing the installation density.

[0038] In specific implementation, the lugs 112 can be positioned directly opposite each other or not directly opposite each other. That is, the line connecting the center points of the two lugs 112 can be perpendicular to the line connecting the center points of the two ceramic sleeves 1111 or not. The number of lugs 112 can be two, three, or more. Preferably, there are two lugs 112, and the line connecting the center points of the two lugs 112 can be perpendicular to the line connecting the center points of the two ceramic sleeves 1111.

[0039] At least two latches 113 are disposed on the outer surface of the inner adapter 11 and are engaged and fixed with the latching portion 121 of the outer shell 12. The angle between the line connecting the center points of one pair of latches 113 and the line connecting the center points of the two lugs 112 is 20° to 90°. In this embodiment, the latches 113 are disposed on the outer surface of the inner adapter 11 for engaging with the latching portion 121 of the outer shell 12 to fix the inner adapter 11 and the outer shell 12. Furthermore, the angle between the line connecting the center points of one pair of latches 113 and the two lines connecting the center points of the two lugs 112 is greater than or equal to 20° and less than or equal to 90°. That is, the line connecting the center points of the two latches 113 may or may not intersect the line connecting the center points of the two lugs 112 perpendicularly. In the specific implementation process, the number of buckles 113 can be two, three or more. Preferably, the number of buckles 113 is two, and the line connecting the center points of the two buckles 113 can be perpendicular to the line connecting the center points of the two lugs 112.

[0040] In the specific implementation process, the position of the buckle 113 only needs to ensure that the line connecting the center points of the two buckles 113 has an angle greater than or equal to 20° and less than or equal to 90° with the line connecting the center points of the two lugs 112. The buckle 113 and the lugs 112 can be set on the same side of the outer side of the inner adapter 11, or they can be set on different sides of the outer side of the inner adapter 11.

[0041] In an optional embodiment, the lug 112 is disposed on the outer surface of the radial section of the inner adapter 11, and the line connecting the center points of the two ceramic sleeves 1111 is parallel to the long side of the radial section of the inner adapter 11. In this embodiment, the line connecting the center points of the two ceramic sleeves 1111 is parallel to the long side of the radial section of the inner adapter 11, that is, the two ceramic sleeves 1111 are horizontally disposed inside the inner adapter 11 relative to the long side of the inner adapter 11. Since the ceramic sleeves 1111 are disposed in the slots 111, that is, the two slots 111 are arranged side by side in the inner adapter 11, making the overall shape of the inner adapter 11 approximately cuboid, and the radial section of the inner adapter 11 is also approximately rectangular. The lug 112 is disposed on the outer surface of the long side of the inner adapter 11, that is, as shown in the figure. Figure 2 As shown in the diagram, the lugs 112 can be designed on the long side of the inner adapter 11, thus avoiding the need to design lugs 112 on the short side of the inner adapter 11, which would make the inner adapter 11 wider. Since most outdoor dual-core fiber optic adapters are cylindrical, this design allows for a more compact overall structure of the inner adapter 11, thereby reducing its size. Figure 5a and Figure 5bAs shown, a circular shape is obtained by setting a lug 112 in the long side space of the inner adapter 11. Figure 5a The diameter shown by the dashed line is much smaller than the circle obtained by setting the lug 112 in the short side space of the inner adapter 11. Figure 5b The diameter (shown by the dashed line) is used to avoid wasting space inside the dual-core fiber optic adapter, thereby reducing the size of the dual-core fiber optic adapter, reducing its space occupancy rate, and increasing installation density.

[0042] In an optional embodiment, the latch 113 and the lug 112 are respectively disposed on different outer surfaces of the inner adapter 11. In this embodiment, the inner adapter 11 has an overall shape similar to a cuboid. By disposing of the latch 113 and the lug 112 on different outer surfaces of the inner adapter 11, the space on each outer surface of the inner adapter 11 can be fully utilized, thereby rationally planning the design position of each functional component. This makes the overall design of the inner adapter 11 more reasonable and the structure more compact, thereby reducing the size of the inner adapter 11 and thus reducing the volume of the dual-core fiber optic adapter, thereby reducing the space occupancy rate of the dual-core fiber optic adapter and increasing the installation density.

[0043] In an optional embodiment, the angle between the line connecting the center points of the two opposite lugs 112 and the line connecting the center points of the two ceramic sleeves 1111 is 90°, and the angle between the line connecting a pair of center points of at least two snap fasteners 113 and the line connecting the center points of the two lugs 112 is 90°. In this embodiment, the line connecting the center points of the two opposite lugs 112 is perpendicular to the line connecting the center points of the two ceramic sleeves 1111, and the line connecting a pair of center points of at least two snap fasteners 113 is perpendicular to the line connecting the center points of the two lugs 112. That is, the line connecting a pair of center points of at least two snap fasteners 113 coincides with or is parallel to the line connecting the center points of the two ceramic sleeves 1111. By distributing the snap fasteners 113 and lugs 112 on different outer surfaces of the inner adapter 11, the short side space of the inner adapter 11 can be fully utilized, and separating the two functional components, snap fasteners 113 and lugs 112, can also avoid interference during installation. Furthermore, the two clips 113 are symmetrically and parallelly arranged with respect to the ceramic sleeve 1111, and the two lugs 112 are symmetrically and perpendicularly arranged with respect to the ceramic sleeve 1111. This symmetrical and perpendicular arrangement can improve the balance of force on the inner adapter 11 during assembly and connection, thereby improving the connection stability between the inner adapter 11 and the outer shell 12, and thus ensuring the accuracy of the fiber optic connection.

[0044] In an optional embodiment, the lug 112 extends radially outward from the outer wall of the inner shell of the inner adapter 11, and the outer edge of the lug 112 does not exceed the circumcircle of the inner shell of the inner adapter 11 in the radial direction. In this embodiment, the inner shell of the inner adapter 11 is the rectangular portion of the inner adapter 11 after removing the lug 112 and the snap 113. The circumcircle of the inner shell refers to the smallest geometric circle that completely encloses the outline of the outer wall of the inner shell on any cross-section containing the central axis of the inner adapter 11, with the central axis of the inner adapter 11 as the center. The diameter of this circle is equal to the maximum diagonal length of the inner shell on that cross-section. Figure 5a As shown, the circumcircle of the inner shell of the inner adapter 11, where slot 111 is located, is... Figure 5a The circle shown by the dashed line has its center at the center of the inner shell of the inner adapter 11, as follows. Figure 5a As shown, lug 112 extends radially outward from the outer side wall of the inner housing of inner adapter 11, but the outer edge of lug 112 (or the most protruding part of lug 112) does not exceed the circumcircle.

[0045] Between the outer circle and the outer surface of the inner adapter 11, the lug 112 can have various shapes, such as an arc, a rectangle, or a square. Preferably, the lug 112 is arc-shaped, and the top of the arc-shaped lug (i.e., the most protruding part) does not exceed the outer circle. That is, it can be located on the outer circle or between the outer circle and the outer surface of the inner adapter 11. By limiting the size of the lug 112, the long side space of the inner adapter 11 can be fully utilized, making the overall structural design of the inner adapter 11 more compact, thereby reducing the size of the inner adapter 11 and thus reducing the volume of the dual-core fiber optic adapter.

[0046] In an optional embodiment, please refer to Figure 3 , Figure 3 This is a cross-sectional structural diagram of a dual-core fiber optic adapter disclosed in this embodiment. Figure 3As shown, this dual-core fiber optic adapter also includes an elastic element 13. One end of the elastic element 13 abuts against the lug 112, and the other end abuts against the inner wall of the outer shell 12. When the inner adapter 11 and the outer shell 12 are engaged, the elastic element 13 is located between the inner adapter 11 and the outer shell 12 to provide a buffering effect. In this embodiment, one end of the elastic element 13 abuts against the lug 112, and the other end abuts against the inner wall of the outer shell 12. After the inner adapter 11 and the outer shell 12 are engaged, the elastic element 13 is fixed between the inner adapter 11 and the outer shell 12, thereby providing a buffering effect for the connection between the inner adapter 11 and the outer shell 12. In specific implementations, the elastic element 13 can be a spring or a component with elasticity, such as silicone. An elastic element 13 is provided between the inner adapter 11 and the outer shell 12. When the inner adapter 11 is installed, on the one hand, the inner adapter 11 can be tightly fitted with the outer shell 12 under the action of the elastic element 13, which improves the connection reliability between the inner adapter 11 and the outer shell 12. On the other hand, it can also play a certain buffering role when making fiber optic connections, thereby ensuring that the fiber optic heads of the indoor fiber optic connector and the outdoor fiber optic connector are not damaged by rigid mating during the connection process, and ensuring the accuracy of fiber optic connection.

[0047] In optional embodiments, such as Figure 3 As shown, an axial mounting channel 122 for mounting the elastic element 13 is provided on the inner wall of the outer casing 12. One end of the mounting channel 122 is not connected to the end face of the outer casing 12, and the other end of the elastic element 13 abuts against one end face of the mounting channel 122. In this embodiment, the inner wall of the outer casing 12 is provided with the mounting channel 122, and the elastic element 13 is installed in the mounting channel 122. One end of the elastic element 13 abuts against the lug 112, and the other end abuts against the bottom surface of the mounting channel 122. By providing the mounting channel 122, the elastic deformation of the elastic element 13 can be limited, preventing the elastic element 13 from undergoing non-axial elastic deformation, thereby ensuring the normal use of the dual-core fiber optic adapter 10. It should be noted that, in order to limit the elastic element 13, one end of the mounting channel 122 is not connected to the end face of the housing 12, but the side wall of the mounting channel 122 can be connected to the inner cavity of the housing 12. That is to say, as long as the mounting channel 122 can accommodate the elastic element 13, it is not limited whether the circumferential side wall of the mounting channel 122 is closed.

[0048] In an optional embodiment, please refer to Figure 4 , Figure 4 This is a partial structural diagram of the inner adapter in another direction of a dual-core fiber optic adapter disclosed in this embodiment. Figure 4As shown, the side wall of slot 111 is also provided with a through hole 114 penetrating through the side wall of slot 111. A locking step 1141 is formed on one side of the through hole 114, which is used to engage with the indoor fiber optic connector. In this embodiment, the side wall of slot 111 is also provided with a through hole 114, and a locking step 1141 for connecting the indoor fiber optic connector is formed on one side of the through hole 114. When the indoor fiber optic connector is inserted into slot 111, the indoor fiber optic connector engages with the locking step 1141, thereby fixing the indoor fiber optic connector in the dual-core fiber optic adapter. In specific implementation, each slot 111 has two through holes 114 on its side wall.

[0049] In an optional embodiment, the snap-fit ​​portion 121 is a snap-fit ​​groove that penetrates the side wall of the housing 12. In this embodiment, the snap-fit ​​groove is directly provided through the housing 12, which can provide sufficient snap-fit ​​space for the inner adapter 11 and the housing 12, and can also reduce the thickness of the housing 12, thereby reducing the size of the dual-core fiber optic adapter.

[0050] In an optional embodiment, one end of the housing 12 is provided with a connecting groove 123 for connecting cable ties. In this embodiment, the cable tie can be fitted onto the connecting groove 123. The cable tie can be used to connect components such as dust caps. The connecting groove 123 is preferably located at the end near the connection between the inner adapter 11 and the outdoor fiber optic connector (i.e., as shown in the image). Figure 1 (The left end shown in the diagram).

[0051] Furthermore, this embodiment of the invention also provides an optical fiber connection assembly, including a dual-core optical fiber adapter as shown in any of the above embodiments and an outdoor optical fiber connector and / or an indoor optical fiber connector that mate with the dual-core optical fiber adapter. The outdoor optical fiber connector and the indoor optical fiber connector are respectively inserted into the dual-core optical fiber adapter from opposite ends to achieve optical fiber connection.

[0052] According to the embodiments of this utility model, a dual-core fiber optic adapter and a fiber optic connection assembly are disclosed. The dual-core fiber optic adapter includes an inner adapter and a outer shell that are snapped together. The inner adapter includes two slots, at least two lugs, and at least two clips. The slots are used for indoor and outdoor fiber optic connectors to be inserted. The two slots are arranged side by side inside the inner adapter, and each slot is provided with a ceramic sleeve. The at least two lugs are respectively arranged on two opposite outer surfaces of the inner adapter, and the line connecting the center points of the two opposite lugs intersects the line connecting the center points of the two ceramic sleeves, with an included angle of 10° to 90°. The at least two clips are arranged on the outer surfaces of the inner adapter and are snapped together with the snap-fit ​​part of the outer shell, with an included angle of 30° to 90° between the line connecting the center points of one pair of clips and the line connecting the center points of the two lugs. Because the two slots in the inner adapter are arranged side by side, the radial cross-section of the inner adapter is roughly rectangular. By setting the angle between the line connecting the center points of the two lugs and the line connecting the center points of the two ceramic sleeves, the two lugs are positioned along the longer side of the rectangle formed by the radial cross-section of the inner adapter. Since dual-core fiber optic adapters are typically cylindrical, placing the lugs along the longer side of the inner adapter fully utilizes the space along that side, resulting in a more compact overall structure. This reduces the size of the inner adapter, decreases its volume, and ultimately reduces its space occupancy, increasing installation density.

[0053] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0054] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Without departing from the basic principles of this utility model, any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details will be included within the scope of the claims of this utility model.

Claims

1. A dual-fiber optic adapter, comprising: The double-core fiber adapter comprises an inner adapter (11) and a shell (12), the inner adapter (11) is clamped and fixed with the shell (12), wherein the inner adapter (11) comprises: Two slots (111) are arranged side by side in the inner adapter (11), and a ceramic sleeve (1111) is arranged in each slot (111), the ceramic sleeve (1111) is used for inserting indoor and outdoor fiber connectors; At least two lugs (112) are arranged on the opposite outer sides of the inner adapter (11), and the line connecting the centers of the two lugs (112) intersects with the line connecting the centers of the two ceramic sleeves (1111), and the included angle is 10°-90°. At least two buckles (113) are arranged on the outer side of the inner adapter (11) and clamped and fixed with the clamping part (121) of the shell (12), and the included angle between the line connecting the centers of a pair of buckles (113) and the line connecting the centers of the two lugs (112) is 20°-90°.

2. The dual-fiber optic adapter of claim 1, wherein, The lug (112) is arranged on the outer side of the long side of the radial section of the inner adapter (11), and the line connecting the centers of the two ceramic sleeves (1111) is parallel to the long side of the radial section of the inner adapter (11).

3. The dual-fiber optic adapter of claim 1, wherein, The buckle (113) and the lug (112) are arranged on different outer sides of the inner adapter (11).

4. The dual-fiber optic adapter of claim 1, wherein, The included angle between the line connecting the centers of the two lugs (112) and the line connecting the centers of the two ceramic sleeves (1111) is 90°, and the included angle between the line connecting the centers of a pair of buckles (113) and the line connecting the centers of the two lugs (112) is 90°.

5. The dual-fiber optic adapter of claim 1, wherein, The double-core fiber adapter further comprises: An elastic member (13) is arranged on the lug (112), and the other end of the elastic member (13) abuts against the inner wall of the shell (12), when the inner adapter (11) and the shell (12) are clamped, the elastic member (13) is located between the inner adapter (11) and the shell (12) to play a buffering role.

6. The dual-fiber optic adapter of claim 5, wherein, An installation channel (122) for installing the elastic member (13) is arranged on the inner wall of the shell (12) in the axial direction, one end face of the installation channel (122) does not communicate with the end face of the shell (12), and the other end of the elastic member (13) abuts against the one end face of the installation channel (122).

7. The dual-fiber optic adapter of any one of claims 1-5, wherein, A through hole (114) is arranged in the side wall of the slot (111), one side of the through hole (114) forms a clamping step (1141), and the clamping step (1141) is used for clamping with an indoor fiber connector.

8. The dual-fiber optic adapter of any one of claims 1-5, wherein, The clamping part (121) is a clamping groove penetrating the side wall of the shell (12).

9. The dual-fiber optic adapter of claim 1, wherein, The lugs (112) extend radially outwardly from the outer side wall of the inner adapter (11) housing, and the outer edge of the lugs (112) does not radially exceed the circumscribed circle of the inner adapter (11) housing.

10. A fiber optic connection assembly, comprising: Comprise: The dual-fiber adapter of any one of claims 1-9 and an outdoor fiber optic connector and / or an indoor fiber optic connector mated therewith.

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