Optical fiber connector plug

Abstract

The invention belongs to the technical field of optoelectronic devices, and relates to an optical fiber connector plug which comprises a dustproof fixing assembly, the dustproof fixing assembly and a flexible dustproof pipe form a double-sealing structure through an annular air bag, and during plugging, an external buckle extrudes a clamping block to drive the annular air bag to expand so that an optical fiber can be tightly wrapped by the inner wall of the dustproof pipe; a zero-clearance dustproof barrier is formed, and the industrial problem of signal attenuation caused by invasion of dust through gaps of the optical fibers is thoroughly solved; the tail end adopts a sliding tube buffer design, a built-in second reset spring absorbs tension, optical fiber allowance is reserved to ensure that a bare fiber is not stressed, a rotary connector is matched to disperse torsional stress, the tail cap is prevented from being broken, the service life of equipment is remarkably prolonged, and the risk of optical fiber breakage is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optoelectronic devices, and more specifically, to an optical fiber connector plug. Background Art

[0002] An optical fiber connector plug is a core component for achieving detachable connection between optical fibers in an optical fiber communication system. By precisely docking the optical fiber end faces, it ensures efficient transmission of optical signals. It supports quick plugging and unplugging, facilitating construction and maintenance, and also has the characteristics of low loss and strong environmental adaptability.

[0003] Traditional optical fiber connectors generally have dust-proof defects during plugging and unplugging: The conventional design only uses a single-layer rubber sealing ring or a brush structure. During the plugging and unplugging process, there will inevitably be a gap between the optical fiber and the sleeve, and tiny dust particles in the environment can easily invade the interior of the connector through this gap. Especially in complex environments such as industrial sites and computer rooms, where the concentration of airborne particulate matter is relatively high, dust adhering to the optical fiber end face or the surface of the fiber core will directly lead to an increase in optical signal transmission loss, and long-term accumulation may even cause communication interruption faults. Although the prior art attempts to improve by adding auxiliary structures such as dust caps, the cover is easily lost during frequent plugging and unplugging, and the continuous sealing problem in the plugged state cannot be solved.

[0004] In view of this, the present invention proposes an optical fiber connector plug to solve the above technical problems. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title, but such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] An optical fiber connector plug includes a protective sleeve, a dust-proof head is arranged inside the protective sleeve, and a dust-proof fixing component is arranged on the dust-proof head; Among them, the dust-proof fixing component includes a guiding tube for guiding the direction of the optical fiber. The guiding tube is arranged inside the dust-proof head through a filler. An annular airbag is arranged inside the guiding tube, and a dust-proof tube is arranged inside the annular airbag. The optical fiber penetrates through the dust-proof tube. When the annular airbag expands, it compresses the dust-proof tube, and the dust-proof tube is flattened and fits around the optical fiber, forming direction fixation and sealing of the optical fiber to prevent dust from entering through the gap between the dust-proof tube and the optical fiber.

[0007] A further improvement of the technical solution of the present invention is that a chamber is opened on the dust-proof head, a clamping block is slidably connected inside the chamber, the clamping block has an inclined surface structure, the bottom of the clamping block is fixedly connected to the bottom of the chamber through a first return spring, and the bottom of the chamber and the annular airbag are communicated through a ventilation pipe.

[0008] A further improvement of the technical solution of the present invention lies in that a guiding groove is provided at the entrance end of the optical fiber in the guiding tube.

[0009] A further improvement of the technical solution of the present invention lies in that a sliding tube is slidably connected to the tail end of the protective sleeve. A tail cap is provided at one end of the sliding tube extending out of the protective sleeve. After the optical fiber passes through the tail cap, it is hermetically fixedly connected through a heat-shrinkable tube and the tail cap.

[0010] A further improvement of the technical solution of the present invention lies in that the sliding tube is rotatably connected to the tail cap through a rotating connector, and the sliding tube and the tail cap can rotate relative to each other.

[0011] A further improvement of the technical solution of the present invention lies in that an anti-pulling and telescopic assembly is provided inside the protective sleeve. The anti-pulling and telescopic assembly includes a fixed disk fixedly connected inside the protective sleeve. A sliding tube slidably passes through the fixed disk. A second return spring is fixedly connected to the fixed disk. The other end of the second return spring is fixedly connected to the outer wall of the sliding tube, and the second return spring is nested on the sliding tube.

[0012] A further improvement of the technical solution of the present invention lies in that a fixing structure is provided between the dust-proof head and the sliding tube. The fixing structure includes a lower fixing member and an upper fixing member. The upper fixing member is detachably connected to the lower fixing member through a fixing screw to fix the optical fiber. The lower fixing member is fixedly connected to the inside of the protective sleeve through a connecting frame.

[0013] A further improvement of the technical solution of the present invention lies in that when installing the optical fiber, part of the optical fiber needs to be stored in the sliding tube so that the optical fiber has a surplus to cope with subsequent pulling.

[0014] Advantages of the present invention: In terms of dust-proof sealing, a combined design of an annular airbag and a flexible dust-proof tube is adopted. When the plug is inserted, the airbag is automatically triggered to expand, which not only forms a circumferential sealing barrier for the optical fiber to effectively block the intrusion of dust, but also realizes the precise positioning of the optical fiber through the radial pressure generated by the deformation of the airbag, avoiding the defect that the traditional clamping structure is easy to loosen. In response to the tensile strength requirement of the optical fiber, a buffer structure of the sliding tube is combined with the design of reserving surplus optical fiber. When an external pulling force acts on the tail cap, the sliding tube slides along the inner wall of the protective sleeve and compresses the return spring, preferentially consuming the length of the reserved optical fiber inside, so that the bare fiber core is always in a tension-free state. In terms of durability, the tail cap and the optical fiber adopt an integrated encapsulation process of a heat-shrinkable tube, combined with a detachable fixing fixture, which not only ensures the stable connection of the surface optical fiber, but also reserves an operation space for later maintenance. The addition of the rotating connector more breakthroughly solves the problem of torsional stress at the tail end. When the plug is pulled by irregular external forces, the connector automatically rotates to release the torque, avoiding the sealing failure caused by the cracking of the tail cap. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Wherein: Figure 1 It is a schematic diagram of the overall structure of an optical fiber connector plug; Figure 2 It is a schematic diagram of the internal connection structure of an optical fiber connector plug; Figure 3 It is Figure 2 An enlarged schematic diagram of the structure at A in Figure 4 It is Figure 3 An enlarged schematic diagram of the structure at B in Figure 5 It is a schematic diagram of the connection structure of the dust-proof fixing component in an optical fiber connector plug; Figure 6 It is a schematic diagram of the connection structure of the dust-proof fixing component and the anti-pulling and telescopic component in an optical fiber connector plug; Figure 7 It is Figure 6 An enlarged schematic diagram of the structure at C in Figure 8 It is a schematic diagram of the structure of the annular airbag, dust-proof tube and guide tube in an optical fiber connector plug.

[0017] In the figure: 11. Protective sleeve; 12. Tail cap; 13. Heat shrinkable tube; 14. Dust-proof head; 15. Rotating connector; 2. Dust-proof fixing component; 21. Guide tube; 22. Annular airbag; 23. Dust-proof tube; 24. Clamping block; 25. Chamber; 26. First return spring; 27. Vent pipe; 28. Filler; 29. Guide groove; 3. Anti-pulling and telescopic component; 31. Sliding tube; 32. Fixed disk; 33. Second return spring; 4. Fixing structure; 41. Lower fixing part; 42. Upper fixing part; 43. Fixing screw; 100. Optical fiber. Detailed implementation manners

[0018] In order to make the object, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment: As Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, an optical fiber connector plug includes a protective sleeve 11, and a dust-proof head 14 is provided inside the protective sleeve 11. It is characterized in that a dust-proof fixing component 2 is provided on the dust-proof head 14; Among them, the dust-proof fixing component 2 includes a guide tube 21 for guiding the direction of the optical fiber 100. The guide tube 21 is arranged inside the dust-proof head 14 through a filler 28. An annular airbag 22 is provided inside the guide tube 21, and a dust-proof tube 23 is provided inside the annular airbag 22. The optical fiber 100 passes through the dust-proof tube 23. When the annular airbag 22 expands, it compresses the dust-proof tube 23, and the dust-proof tube 23 is flattened and attached around the optical fiber 100, forming direction fixing and sealing for the optical fiber 100 to prevent dust from entering through the gap between the dust-proof tube 23 and the optical fiber 100; A chamber 25 is opened on the dust-proof head 14, and a clamping block 24 is slidably connected inside the chamber 25. The clamping block 24 has an inclined surface structure. The bottom of the clamping block 24 is fixedly connected to the bottom of the chamber 25 through a first return spring 26, and the bottom of the chamber 25 and the annular airbag 22 are communicated through a ventilation pipe 27; A guide groove 29 is provided at the inlet end of the optical fiber 100 in the guide tube 21; the guide groove 29 changes from a wide opening to a narrow opening, which is conducive to the penetration of the optical fiber 100.

[0020] In this embodiment, when installing the optical fiber 100, first strip the outer skin of the optical fiber 100, then insert the bare optical fiber 100 through the guide groove 29, and then one end of the optical fiber 100 passes through the dust-proof tube 23 and then passes out of the dust-proof head 14. The dust-proof tube 23 has supportability, so that the optical fiber 100 can pass through the middle of the annular airbag 22; When connecting the fiber optic connector plug to an external device, the traditional connection method generally uses snap connection. Therefore, there is usually a snap on the external device. When connecting, the snap first contacts the inclined surface of the snap block 24 (push-in snap connection). Due to the pressure on the inclined surface of the snap block 24, the snap block 24 slides into the chamber 25, causing the first return spring 26 to contract. At the same time, the air in the chamber 25 is compressed into the ventilation pipe 27, and then the air enters the annular airbag 22, causing the annular airbag 22 to expand. At the same time, due to the external blockage of the guiding pipe 21 on the annular airbag 22, the annular airbag 22 can only deform inward at this time, so that the annular airbag 22 squeezes the dust-proof pipe 23 and flattens the dust-proof pipe 23. The flattened dust-proof pipe 23 will wrap around the periphery of the optical fiber 100, fixing the position of the optical fiber 100 and playing a role in fixing the optical fiber 100. When it is necessary to disconnect the fiber optic connector plug from the external device (during maintenance), the snap block 24 can be pressed to make the snap block 24 move downward again, so that the external snap is disengaged from the snap block 24. Subsequently, the snap block 24 is not squeezed by the external snap. At this time, the first return spring 26 extends and the snap block 24 returns to its original position. At the same time, the space in the chamber 25 increases, causing the ventilation pipe 27 to extract the gas in the annular airbag 22. Subsequently, the annular airbag 22 returns to its original size. At the same time, the dust-proof pipe 23 unfolds after no longer being squeezed by the annular airbag 22, so that the optical fiber 100 is not fixed and the user can operate on the optical fiber 100.

[0021] It should be noted that since the annular airbag 22 expands to flatten the dust-proof pipe 23, the optical fiber 100 is fixed. At the same time, the flattened dust-proof pipe 23 is sealed between the annular airbag 22 and the optical fiber 100, preventing external dust from contacting the optical fiber 100 and playing a role in dust prevention, preventing dust from contacting the optical fiber 100 and causing damage to the optical fiber 100 during subsequent work.

[0022] As Figure 2 、 Figure 4 and Figure 6 shown, a sliding pipe 31 is slidably connected to the tail end of the protective sleeve 11. A tail cap 12 is provided at one end of the sliding pipe 31 extending out of the protective sleeve 11. After the optical fiber 100 passes through the tail cap 12, it is hermetically and fixedly connected to the tail cap 12 through a heat shrinkable tube 13. The sliding pipe 31 is rotatably connected to the tail cap 12 through a rotating connector 15, and the sliding pipe 31 and the tail cap 12 can rotate relative to each other. A fixing structure 4 is provided between the dust-proof head 14 and the sliding pipe 31. The fixing structure 4 includes a lower fixing member 41 and an upper fixing member 42. The upper fixing member 42 is detachably connected to the lower fixing member 41 through a fixing screw 43 to fix the optical fiber 100. The lower fixing member 41 is fixedly connected to the inside of the protective sleeve 11 through a connecting frame.

[0023] In this embodiment, during installation, the optical fiber 100 with an outer skin is passed through the tail cap 12, the heat shrinkable tube 13, and the sliding tube 31, and then the optical fiber 100 with the outer skin is pre-fixed by the upper fixing member 41, the lower fixing member 42, and the fixing screw 43. Subsequently, the outer skin of the optical fiber 100 with the outer skin is peeled off and inserted into the guiding groove 29, and the heat shrinkable tube 13 is heated so that the heat shrinkable tube 13, the optical fiber 100, and the tail cap 12 are integrated.

[0024] It should be noted that, as Figure 6 shown, a small section of the optical fiber 100 remains in the sliding tube 31, and at the same time, the connector 15 is rotated to connect the tail cap 12 and the sliding tube 31. In traditional daily use, the user often pulls the optical fiber 100, and the pulling is random in different directions, which may cause the tail cap 12 to crack and ultimately the optical fiber 100 to break. By using the rotating connector 15, when pulling in different directions, the rotating connector 15 can drive the tail cap 12 to rotate, preventing the tail cap 12 from being damaged and losing its sealing function. Although the tail cap 12 will drive the optical fiber 100 to rotate, since a section of the optical fiber 100 remains in the sliding tube 31, no torsion will be generated on the optical fiber 100, so the optical fiber 100 will not be damaged.

[0025] As Figure 2 、 Figure 5 and Figure 6 shown, an anti-pulling and telescopic assembly 3 is provided in the protective sleeve 11. The anti-pulling and telescopic assembly 3 includes a fixed disk 32 which is fixedly connected inside the protective sleeve 11. The sliding tube 31 slides through the fixed disk 32. A second return spring 33 is fixedly connected to the fixed disk 32, and the other end of the second return spring 33 is fixedly connected to the outer wall of the sliding tube 31. The second return spring 33 is nested on the sliding tube 31; When installing the optical fiber 100, a part of the optical fiber 100 needs to be stored in the sliding tube 31 so that the optical fiber 100 has a surplus to cope with subsequent pulling.

[0026] In this embodiment, similar to the above embodiment, when there is a human factor to pull the optical fiber 100 during subsequent use (in traditional use, the pulling phenomenon has a small amplitude. For example, when connecting a mouse cable to a host, the user will pull the mouse cable during use), the optical fiber 100 transmits the pulling force to the sliding tube 31 through the tail cap 12, causing the sliding tube 31 to slide in the protective sleeve 11 and the second return spring 33 to contract. However, a section of the optical fiber 100 in the sliding tube 31 is stretched, but its total length is greater than the sliding stroke of the sliding tube 31, so the optical fiber 100 in the sliding tube 31 will not be subjected to the pulling force, thereby preventing the optical fiber 100 from being damaged during pulling (in fact, when the user generally pulls, they will stop after encountering sufficient resistance, so the main function of the sliding tube 31 is to provide this resistance to protect the optical fiber 100).

[0027] It should be noted that although the optical fiber 100 is also connected at the end cap 12, when the pulling is resisted, the optical fiber 100 at this place is stressed. However, the optical fiber 100 at this place has an epidermis and can withstand the tensile force. The device mainly protects the optical fiber 100 with the outer skin peeled off inside from the tensile force. After the optical fiber 100 has no outer skin, its ability to withstand the tensile force is greatly reduced and it is extremely easy to break.

[0028] The working process is as follows: When installing, pass the optical fiber 100 with the epidermis through the tail cap 12, the heat shrinkable tube 13 and the sliding tube 31, and then pre-fix the optical fiber 100 with the epidermis through the upper fixing member 41, the lower fixing member 42 and the fixing screw 43. Subsequently, peel off the outer skin of the optical fiber 100 with the epidermis and insert it into the guiding groove 29. Heat the heat shrinkable tube 13 so that the heat shrinkable tube 13, the optical fiber 100 and the tail cap 12 form an integral body. Then pass the bare optical fiber 100 through the guiding groove 29, and then one end of the optical fiber 100 passes through the dust-proof tube 23 and then passes out from the dust-proof head 14. The dust-proof tube 23 has support so that the optical fiber 100 can pass through the middle of the annular airbag 22; when connecting the optical fiber connector plug and the external device, the traditional connection method generally uses snap connection for connection. Therefore, there is generally a snap on the external device. When connecting, the snap first contacts the inclined surface of the snap block 24. Due to the pressure on the inclined surface of the snap block 24, the snap block 24 slides into the chamber 25, causing the first return spring 26 to contract. At the same time, the air in the chamber 25 is compressed into the ventilation pipe 27, and then the air enters the annular airbag 22, causing the annular airbag 22 to expand. At the same time, due to the obstruction of the guiding tube 21 on the outside of the annular airbag 22, the annular airbag 22 can only deform inward at this time, so that the annular airbag 22 squeezes the dust-proof tube 23 and flattens the dust-proof tube 23. The flattened dust-proof tube 23 will wrap around the periphery of the optical fiber 100, fixing the position of the optical fiber 100 and playing a role in fixing the optical fiber 100; when it is necessary to disconnect the optical fiber connector plug and the external device, the snap block 24 can be pressed to make the snap block 24 move down again, so that the external snap and the snap block 24 are disengaged. Subsequently, the snap block 24 is not squeezed by the external snap. At this time, the first return spring 26 extends and the snap block 24 returns to its original position. At the same time, the space in the chamber 25 increases, causing the ventilation pipe 27 to extract the gas in the annular airbag 22. Subsequently, the annular airbag 22 returns to its original size, and at the same time, the dust-proof tube 23 unfolds without being squeezed by the annular airbag 22, so that the optical fiber 100 is not fixed, and the user can operate the optical fiber 100. In the above process, since the annular airbag 22 expands, the dust-proof tube 23 is flattened, so that the optical fiber 100 is fixed. At the same time, the flattened dust-proof tube 23 is sealed with the annular airbag 22 and the optical fiber 100, preventing external dust from contacting the optical fiber 100 and playing a role in dust prevention, preventing dust from contacting the optical fiber 100 and causing damage to the optical fiber 100 during subsequent work. In traditional daily use, the user often pulls the optical fiber 100, and pulls it in different directions irregularly, which will cause the tail cap 12 to crack and eventually cause the optical fiber 100 to break. Using the rotating connector 15, when pulling in different directions, the rotating connector 15 can drive the tail cap 12 to rotate, preventing the tail cap 12 from being damaged and losing its sealing function. Although the tail cap 12 will drive the optical fiber 100 to rotate, since there is a section of the optical fiber 100 left in the sliding tube 31, no torsion will be generated on the optical fiber 100, so that the optical fiber 100 is not damaged.When a pulling force is applied to the optical fiber 100 due to human factors, the optical fiber 100 transfers the pulling force to the sliding tube 31 through the end cap 12, causing the sliding tube 31 to slide within the protective sleeve 11 and the second return spring 33 to contract. However, a section of the optical fiber 100 located within the sliding tube 31 is stretched, but its total length is greater than the sliding stroke of the sliding tube 31. Therefore, the optical fiber 100 within the sliding tube 31 is not subjected to the pulling force, thereby preventing the optical fiber 100 from being damaged during pulling.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above-described embodiments and the descriptions in the specification merely illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all such changes and improvements fall within the scope of the present invention as claimed. The scope of the present invention as claimed is defined by the appended claims and their equivalents.

Claims

1. An optical fiber connector plug, comprising a protective sleeve (11), and a dust-proof head (14) is provided inside the protective sleeve (11), characterized in that, A dust-proof head (14) is provided with a dust-proof fixing assembly (2); Among them, the dust-proof fixing assembly (2) includes a guiding tube (21) for guiding the direction of the optical fiber (100). The guiding tube (21) is arranged inside the dust-proof head (14) through a filler (28). An annular airbag (22) is arranged inside the guiding tube (21). A dust-proof tube (23) is arranged inside the annular airbag (22). The optical fiber (100) penetrates through the dust-proof tube (23). When the annular airbag (22) expands, it compresses the dust-proof tube (23), and the dust-proof tube (23) is flattened and attached around the optical fiber (100), forming direction fixing and sealing of the optical fiber (100) to prevent dust from entering through the gap between the dust-proof tube (23) and the optical fiber (100).

2. The fiber optic connector plug as described in claim 1, wherein, A chamber (25) is opened on the dust-proof head (14). A clamping block (24) is slidably connected inside the chamber (25). The clamping block (24) has an inclined surface structure. The bottom of the clamping block (24) is fixedly connected to the bottom of the chamber (25) through a first return spring (26). The bottom of the chamber (25) and the annular airbag (22) are communicated through a ventilation pipe (27).

3. The fiber optic connector plug as described in claim 2, wherein, A guiding groove (29) is arranged at the inlet end of the optical fiber (100) in the guiding tube (21).

4. The fiber optic connector plug as described in claim 1, wherein A sliding tube (31) is slidably connected to the tail end of the protective sleeve (11). A tail cap (12) is arranged at one end of the sliding tube (31) extending out of the protective sleeve (11). After the optical fiber (100) passes through the tail cap (12), it is hermetically and fixedly connected to the tail cap (12) through a heat-shrinkable tube (13).

5. The fiber optic connector plug as described in claim 4, wherein, The sliding tube (31) is rotatably connected to the tail cap (12) through a rotating connector (15), and the sliding tube (31) and the tail cap (12) can rotate relative to each other.

6. The fiber optic connector plug as described in claim 1, wherein An anti-pulling and telescopic assembly (3) is arranged inside the protective sleeve (11). The anti-pulling and telescopic assembly (3) includes a fixed disk (32). The fixed disk (32) is fixedly connected inside the protective sleeve (11). The sliding tube (31) slides through the fixed disk (32). A second return spring (33) is fixedly connected to the fixed disk (32). The other end of the second return spring (33) is fixedly connected to the outer wall of the sliding tube (31). The second return spring (33) is nested on the sliding tube (31).

7. The fiber optic connector plug as described in claim 1, characterized in that, A fixing structure (4) is arranged between the dust-proof head (14) and the sliding tube (31). The fixing structure (4) includes a lower fixing part (41) and an upper fixing part (42). The upper fixing part (42) is detachably connected to the lower fixing part (41) through a fixing screw (43) to fix the optical fiber (100). The lower fixing part (41) is fixedly connected to the inside of the protective sleeve (11) through a connecting frame.

8. The fiber optic connector plug as described in claim 6, wherein, When installing the optical fiber (100), a part of the optical fiber (100) needs to be stored in the sliding tube (31) so that the optical fiber (100) has a surplus to cope with subsequent pulling.

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