Low-insertion-loss optical fiber coupler

Abstract

The utility model provides an optical fiber coupler with low insertion loss, which relates to the technical field of optical fiber couplers, and comprises a coupler main body and an optical fiber main body, two ends of the coupler main body are provided with access ports, the end part of the optical fiber main body is provided with an optical fiber connecting end, and two side surfaces of the access ports are provided with protection assemblies. An L-shaped linear sliding groove is formed in one side of the access port in the vertical direction, one end of the L-shaped connecting plate is slidably located in the L-shaped linear sliding groove, the other end of the L-shaped connecting plate is connected with a protective hoop, the inner wall of the protective hoop abuts against the surface of the optical fiber body, and a threaded positioning arc plate is arranged on the surface of the side, away from the L-shaped connecting plate, of the protective hoop. The end portion of the optical fiber main body is clamped and positioned through the protection assembly, the surface of the optical fiber main body is effectively prevented from bending or shaking, the optical fiber main body is protected, the stability of the optical fiber connecting end and the access port is guaranteed, the stability of data transmission is kept, shaking is prevented, and loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber couplers, in particular to a low insertion loss optical fiber coupler. Background Art

[0002] According to an optical fiber coupler and an optical fiber plug disclosed in Chinese Patent Publication No. CN115267977B; for the optical fiber coupler and the optical fiber plug of the present invention, when the optical fiber is in use, it will bend under various external forces. When the bending degree of the optical fiber is too large, the functionality of the optical fiber will be affected. Especially when inserting the optical fiber plug into the coupler by hand, the optical fiber coupler includes an optical fiber protective sleeve. Through the cooperation of the wire racking frame and the sliding plate, the optical fiber plug is inserted into the optical fiber coupler without directly inserting it by hand, reducing the external force on the optical fiber and reducing the bending degree of the optical fiber; the optical fiber plug is provided with a protective sleeve and an optical fiber plug cover to protect the optical fiber plug. By setting the elastic film, the clamping block and the clamping groove, the optical fiber plug is not easy to fall off after being inserted, thus stabilizing the use of the optical fiber coupler.

[0003] The following technical problems exist in the above patent document and the prior art:

[0004] 1. When the coupler accesses the optical fiber, it is generally directly inserted and positioned through the folding plate on the surface of the port. However, due to insufficient insertion limit, loosening is likely to occur and the stability is not high.

[0005] 2. After the coupler accesses the optical fiber, the end of the optical fiber cannot be protected, resulting in the optical fiber being easily detached and bent when subjected to external impact or torsion. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the disadvantages of insufficient limit for the optical fiber access end, poor protection performance for the optical fiber end and low stability in the prior art, and to propose a low insertion loss optical fiber coupler.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: A low insertion loss optical fiber coupler includes a coupler body and an optical fiber body. Access ports are provided at both ends of the coupler body. An optical fiber connection end is provided at the end of the optical fiber body, and the optical fiber connection end is clamped inside the access port. Protective components are provided on both side surfaces of the access port. The protective components include a protective hoop and an L-shaped connecting plate. An L-shaped linear sliding groove is vertically opened on one side of the access port. One end of the L-shaped connecting plate slides inside the L-shaped linear sliding groove. The other end of the L-shaped connecting plate is connected with a protective hoop. The inner wall of the protective hoop abuts against the surface of the optical fiber body. A threaded positioning arc plate is provided on the side surface of the protective hoop away from the L-shaped connecting plate. A positioning nut is threadedly connected to the surface of the threaded positioning arc plate.

[0008] Preferably, positioning components are symmetrically arranged on both sides of the surface of the optical fiber connection end. The positioning components include positioning inclined blocks and port positioning grooves. Port positioning grooves are symmetrically formed on both sides of the surface of the optical fiber connection end. Spring positioning grooves are formed at positions corresponding to the port positioning grooves vertically on the inner wall of the access port. A positioning spring is arranged inside the spring positioning groove. The bottom end of the positioning spring is connected with a positioning inclined block, and the positioning inclined block is engaged with the surface of the port positioning groove.

[0009] Preferably, limiting folding plates are arranged on both sides of the surface of the optical fiber connection end perpendicular to the positioning components. One end of the limiting folding plate is connected to the surface of the end of the optical fiber connection end away from the optical fiber main body. Limiting protrusions are arranged on the surface of the limiting folding plate. Folding plate positioning grooves are formed at positions corresponding to the limiting folding plates on the inner wall of the access port. Limiting grooves are formed on the surface of the folding plate positioning grooves, and the limiting grooves are engaged with the limiting protrusions.

[0010] Preferably, L-shaped connecting plates, protective hoops and threaded positioning arc plates are vertically and symmetrically distributed on the surface of the L-shaped linear sliding groove.

[0011] Preferably, a transmission plate is arranged inside the coupler main body, and the outer edges of the coupler main body are all processed with rounded corners.

[0012] Preferably, the sides of the positioning inclined blocks near the bottom ends are all inclined surfaces, and the two side surfaces of the port positioning grooves and the edges of the positioning inclined blocks are all processed with rounded corners.

[0013] Preferably, one end of the folding plate positioning groove penetrates through the side surface of the coupler main body, and the surfaces of the limiting grooves and the limiting protrusions are all processed with rounded corners.

[0014] Beneficial effects

[0015] In the present utility model, protective components are arranged at the access port positions at both ends of the optical fiber coupler to protect and position the optical fiber main body. After adjusting the distance through the L-shaped connecting plate, the protective hoop abuts against the surface of the optical fiber main body, and the optical fiber main body surface is clamped and positioned through the positioning nut and the threaded positioning arc plate. The end of the optical fiber main body is clamped and positioned through the protective component on the surface of the coupler main body, effectively preventing the surface of the optical fiber main body from being bent or shaken, protecting the optical fiber main body, ensuring the stability of its optical fiber connection end and the access port, maintaining the stability of data transmission, and preventing shaking to reduce losses.

[0016] In the present utility model, the access port of the coupler body internally clamps and positions the optical fiber connection end of the optical fiber body through the positioning component and the folding plate limiting groove. When the optical fiber connection end is inserted into the access port, it can be simultaneously clamped and positioned on four sides through the positioning component and the folding plate positioning groove, achieving rapid positioning of the surface while the optical fiber connection end is being inserted. At the same time, when the optical fiber connection end falls off, it can be pulled outwards after pressing the limiting folding plate to achieve automatic detachment of the protection component, facilitating the rapid disassembly and assembly of the optical fiber connection end, with strong stability. Limiting from the outside of the optical fiber connection end reduces the loss of transmission directly through port limiting, reduces wear, has strong stability, and enables rapid disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structure diagram of the present utility model;

[0018] Figure 2 is of the present utility model Figure 1 enlarged view of part A;

[0019] Figure 3 is an internal structure diagram of the coupler body of the present utility model;

[0020] Figure 4 is a partially disassembled internal structure diagram of the coupler body of the present utility model;

[0021] Figure 5 is a partial internal structure diagram of the coupler body of the present utility model.

[0022] Legend Explanation:

[0023] 1. Coupler body; 2. Optical fiber body; 3. Optical fiber connection end; 4. Access port; 5. Transmission board; 6. Limiting folding plate; 7. Folding plate positioning groove; 8. Limiting protrusion; 9. Limiting groove; 10. Positioning component; 1001. Port positioning groove; 1002. Positioning inclined block; 1003. Positioning spring; 1004. Spring positioning groove; 11. Protection component; 1101. L-shaped connecting plate; 1102. L-shaped linear sliding groove; 1103. Protection hoop; 1104. Threaded positioning arc plate; 1105. Positioning nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes, and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments and the accompanying drawings. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0025] The specific embodiments of the present utility model will be described below in conjunction with the accompanying drawings. Specific Embodiment 1:

[0027] Referring to Figures 1-5 , a low insertion loss fiber optic coupler includes a coupler body 1 and a fiber optic body 2. Access ports 4 are provided at both ends of the coupler body 1. A transmission board 5 is provided inside the coupler body 1. A fiber optic connection end 3 is provided at the end of the fiber optic body 2, and the fiber optic connection end 3 is snap-fitted inside the access port 4. The outer edges of the coupler body 1 are all rounded. The entire coupler body 1 accesses the fiber optic body 2 through the access ports 4 provided at both ends. The fiber optic body 2 is inserted into the access port 4 through the fiber optic connection end 3 at the end to achieve access to the coupler body 1. The fiber optic signal is received and processed inside the coupler body 1 through the provided transmission board 5.

[0028] When the fiber optic connection end 3 accesses the access port 4, it is mainly protected by two structures: internal snap-fitting and external protection to maintain the stability of the fiber optic connection end 3.

[0029] When achieving stable internal clamping, the surface positioning of the optical fiber connection end 3 is mainly realized through the positioning component 10 and the limitation of the limiting folding plate 6, so as to maintain the stability and quick disassembly of its connection. The specific structure is that on both sides of the surface of the optical fiber connection end 3 perpendicular to the positioning component 10, there are limiting folding plates 6, and one end of the limiting folding plate 6 is connected to the surface of the end of the optical fiber connection end 3 far from the optical fiber main body 2. There are limiting protrusions 8 on the surface of the limiting folding plate 6, and folding plate positioning grooves 7 are opened at the corresponding positions on the inner wall of the access port 4. Limiting grooves 9 are opened on the surface of the folding plate positioning grooves 7, and the limiting grooves 9 are engaged with the limiting protrusions 8. One end of the folding plate positioning groove 7 penetrates through the side surface of the coupler main body 1. The surfaces of both the limiting groove 9 and the limiting protrusion 8 are treated with rounded corners. When inserting the optical fiber connection end 3, keep the limiting folding plate 6 corresponding to the folding plate positioning groove 7. As the limiting folding plate 6 is squeezed during insertion, when it is fully inserted, the limiting folding plate 6 rebounds, so that the limiting protrusion 8 on the surface of the limiting folding plate 6 is engaged with the limiting groove 9 on the surface of the folding plate positioning groove 7, realizing the clamping of both sides of the surface of the optical fiber connection end 3. The side cross-section of the limiting folding plate 6 is L-shaped, the short side edge abuts against the surface of the optical fiber connection end 3, and the other end abuts against the surface of the folding plate positioning groove 7. At the same time, when the optical fiber connection end 3 is inserted, in addition to the limiting folding plate 6, it is also positioned by the protection component 11. The specific structure is that positioning components 10 are symmetrically arranged on both sides of the surface of the optical fiber connection end 3. The positioning component 10 includes a positioning inclined block 1002 and a port positioning groove 1001. Port positioning grooves 1001 are symmetrically opened on both sides of the surface of the optical fiber connection end 3. Spring positioning grooves 1004 are opened at the vertical corresponding positions on the inner wall of the access port 4. A positioning spring 1003 is arranged inside the spring positioning groove 1004. The bottom end of the positioning spring 1003 is connected with a positioning inclined block 1002, and the positioning inclined block 1002 is engaged with the surface of the port positioning groove 1001. When the optical fiber connection end 3 is inserted into the access port 4, the end abuts against the surface of the positioning inclined block 1002. As the optical fiber connection end 3 is pushed in, since the sides of the positioning inclined block 1002 near the bottom end are inclined surfaces, and the surfaces on both sides of the port positioning groove 1001 and the edges of the positioning inclined block 1002 are treated with rounded corners, the optical fiber connection end 3 jacks up the positioning inclined block 1002 along the inclined surface of the positioning inclined block 1002, and the positioning spring 1003 contracts. The positioning spring 1003 and the positioning inclined block 1002 retract into the spring positioning groove 1004. After the optical fiber connection end 3 is fully inserted, at this time, the port positioning groove 1001 on the surface corresponds to the bottom of the positioning inclined block 1002, and the positioning spring 1003 rebounds, driving the positioning inclined block 1002 to move downward to be engaged with the port positioning groove 1001, realizing the positioning of the optical fiber connection end 3. Thus, the four sides of the optical fiber connection end 3 are positioned in all directions through the positioning inclined block 1002 and the folding plate positioning groove 7, maintaining the stability of the connection. When disassembling, press downward along the end of the limiting folding plate 6 to disengage the limiting protrusion 8 from the limiting groove 9, and then pull the optical fiber connection end 3 outwards. As the optical fiber connection end 3 is pulled,Exert extrusion on the positioning inclined block 1002. Due to the component force of the inclined plane, the positioning spring 1003 at the top of the positioning inclined block 1002 rebounds, causing the positioning inclined block 1002 to disengage from the port positioning groove 1001, releasing the limit, and realizing the rapid disconnection of the optical fiber connection end 3 and the access port 4. Compared with the traditional structure directly using the limit folding plate 6, the added positioning component 10 provides a more comprehensive surface protection range for the optical fiber access end and higher stability.

[0030] After the optical fiber connection end 3 is connected to the access port 4, to ensure that the external optical fiber main body 2 is not easily shaken and prevent bending, a protection component 11 is provided on the two side surfaces of the access port 4. The protection component 11 includes a protection hoop 1103 and an L-shaped connecting plate 1101. An L-shaped linear sliding groove 1102 is opened in the vertical direction on one side of the access port 4. One end of the L-shaped connecting plate 1101 slides inside the L-shaped linear sliding groove 1102, and the other end of the L-shaped connecting plate 1101 is connected with a protection hoop 1103. The inner wall of the protection hoop 1103 abuts against the surface of the optical fiber main body 2. A threaded positioning arc plate 1104 is provided on the side surface of the protection hoop 1103 away from the L-shaped connecting plate 1101. A positioning nut 1105 is threadedly connected to the surface of the threaded positioning arc plate 1104. The L-shaped linear sliding groove 1102 is a sliding groove structure with an L-shaped inner wall, which is used to position the end of the L-shaped connecting plate 1101 to prevent it from falling off and provide guidance for the movement of the L-shaped connecting plate 1101. After the L-shaped connecting plate 1101 adjusts its position, the inner wall of the protection hoop 1103 on its surface abuts against the surface of the optical fiber main body 2. After abutting, the threaded positioning arc plate 1104 on the side of the protection hoop 1103 is a semi-circular ring with external threads. The L-shaped connecting plate 1101, the protection hoop 1103, and the threaded positioning arc plate 1104 are vertically symmetrically distributed on the surface of the L-shaped linear sliding groove 1102. The side cross-section of the adjacent threaded positioning arc plates 1104 after abutting is circular and abuts against the inner wall of the positioning nut 1105. Positioning is achieved through the rotation of the positioning nut 1105, realizing the clamping protection of the optical fiber main body 2 at the position close to the optical fiber connection end 3 to prevent bending and collision. Specific Embodiment 2:

[0032] Refer to Figures 1-5, during the actual use of the transmission board 5, the internal transmission board 5 is the core part of the fiber optic coupler. It contains a series of precise optical components and optical paths for realizing the coupling, distribution or combining of optical signals. These components may include fiber collimators, beam splitters, beam combiners, etc. On the transmission board 5, the optical signal first passes through the fiber collimator to collimate the optical signal from the optical fiber to form a parallel light beam. These parallel light beams then enter the beam splitter or beam combiner. The optical signal after coupling processing continues to be transmitted to the next device or optical fiber receiver through the optical fiber at the output port. The access ports 4 are respectively the input port and the output port during actual use. The optical signal enters from the input port, and after coupling processing, it is output from the output port. By optimizing the design and performance parameters of the coupler, it can be ensured that the optical signal maintains high quality and high efficiency during the transmission process. This structure makes the fiber optic coupler an important part of building a stable and reliable fiber optic communication system.

[0033] In summary:

[0034] 1. Protective components 11 are arranged at the positions of the access ports 4 at both ends of the fiber optic coupler to protect and position the optical fiber main body 2. After adjusting the distance through the L-shaped connecting plate 1101, the protective clamp 1103 abuts against the surface of the optical fiber main body 2, and the positioning nut 1105 cooperates with the threaded positioning arc plate 1104 to clamp and position the surface of the optical fiber main body 2. The protective component 11 on the surface of the coupler main body 1 clamps and positions the end of the optical fiber main body 2, effectively preventing the surface of the optical fiber main body 2 from being bent or shaken, protecting the optical fiber main body 2, ensuring the stability of its optical fiber connection end 3 and the access port 4, maintaining the stability of data transmission, preventing shaking and reducing losses;

[0035] 2. The positioning component 10 and the folding plate limiting groove are used to clamp and position the optical fiber connection end 3 of the optical fiber main body 2 inside the access port 4 of the coupler main body 1. When the optical fiber connection end 3 is inserted into the access port 4, it can be clamped and positioned on four sides simultaneously through the positioning component 10 and the folding plate positioning groove 7, realizing rapid surface positioning while the optical fiber connection end 3 is being inserted. At the same time, when the optical fiber connection end 3 falls off, it can be pulled outwards after pressing the limiting folding plate 6 to realize the automatic detachment of the protective component 11, facilitating the rapid disassembly and assembly of the optical fiber connection end 3, with strong stability, reducing the loss of transmission directly through port limiting from the outside of the optical fiber connection end 3,

[0036] Reducing wear, with strong stability, and enabling rapid disassembly and assembly.

[0037] In the present utility model, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present utility model, which are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A low insertion loss optical fiber coupler, comprising a coupler body (1) and an optical fiber body (2), characterized in that: The coupler body (1) is provided with access ports (4) at both ends, the optical fiber body (2) is provided with an optical fiber connection end (3), and the optical fiber connection end (3) is engaged with the inside of the access port (4), and the surfaces of both sides of the access port (4) are provided with protective components (11), and the protective components (11) include a protective clamp (1103) and an L-shaped connecting plate (1101), and an L-shaped linear slide groove (1102) is provided in the vertical direction on one side of the access port (4), and the L-shaped connecting plate One end of the L-shaped connecting plate (1101) is slidably located inside the L-shaped linear slide groove (1102), and the other end of the L-shaped connecting plate (1101) is connected with a protective clamp (1103), the inner wall of the protective clamp (1103) is against the surface of the optical fiber body (2), and the surface of the protective clamp (1103) away from the L-shaped connecting plate (1101) is provided with a threaded positioning arc plate (1104), and the surface of the threaded positioning arc plate (1104) is threadedly connected with a positioning nut (1105).

2. A low insertion loss optical fiber coupler according to claim 1, characterized in that: Positioning components (10) are symmetrically arranged on both sides of the surface of the optical fiber connection end (3), and the positioning components (10) include positioning bevel blocks (1002) and port positioning grooves (1001). Port positioning grooves (1001) are symmetrically arranged on both sides of the surface of the optical fiber connection end (3), and spring positioning grooves (1004) are arranged at positions vertically corresponding to the port positioning grooves (1001) on the inner wall of the access port (4), and positioning springs (1003) are arranged inside the spring positioning grooves (1004). The bottom end of the positioning spring (1003) is connected to a positioning bevel block (1002), and the positioning bevel block (1002) is engaged with the surface of the port positioning groove (1001).

3. A low insertion loss optical fiber coupler according to claim 2, characterized in that: The surface of the optical fiber connection end (3) is provided with limiting folding plates (6) on both sides perpendicular to the positioning assembly (10), and one end of the limiting folding plate (6) is connected to the surface of the end of the optical fiber connection end (3) away from the optical fiber body (2), and the surface of the limiting folding plate (6) is provided with a limiting protrusion (8), and the inner wall of the access port (4) and the limiting folding plate (6) are provided with a folding plate positioning groove (7) at a position corresponding to the position, and the surface of the folding plate positioning groove (7) is provided with a limiting groove (9), and the limiting groove (9) is engaged with the limiting protrusion (8).

4. The low insertion loss optical fiber coupler according to claim 1, characterized in that: The surface of the L-shaped linear slide groove (1102) is vertically symmetrically provided with an L-shaped connecting plate (1101), a protective clamp (1103) and a threaded positioning arc plate (1104).

5. The low insertion loss optical fiber coupler according to claim 1, characterized in that: A transmission plate (5) is provided inside the coupler body (1), and the outer edges of the coupler body (1) are all rounded.

6. A low insertion loss optical fiber coupler according to claim 2, characterized in that: The sides of the positioning bevel block (1002) are all beveled near the bottom end, and the two side surfaces of the port positioning groove (1001) and the edge of the positioning bevel block (1002) are all rounded.

7. The low insertion loss optical fiber coupler according to claim 3, characterized in that: One end of the folding plate positioning groove (7) penetrates the side surface of the coupler body (1), and the surfaces of the limiting groove (9) and the limiting protrusion (8) are both rounded.

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