Optical fiber connector

Abstract

The invention relates to the technical field of optical fiber connection, and discloses an optical fiber connector, which comprises a main body, an insertion core end piece is arranged in the main body, and an embedded optical fiber is arranged in the insertion core end piece; the tail sleeve is detachably connected with the main body; the external incoming optical cable penetrates through the tail sleeve and extends towards the direction of the main body, and the external incoming optical cable comprises an external incoming optical fiber; and the rear sleeve is arranged in the main body, one end of the rear sleeve is connected with the insertion core end piece, the other end of the rear sleeve is detachably connected with an optical cable holding piece, and the optical cable holding piece clamps the external optical cable. According to the optical fiber connector, the optical cable retaining piece and the rear sleeve are designed into a detachable connecting structure, the optical cable retaining pieces matched with the optical cable structures can be selected according to the optical cable structures of different types or different sizes, operation is easy and convenient, the universality of the optical fiber connector is greatly improved, and the cost needed for connecting optical fibers of different types is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber connection, and in particular to an optical fiber connector. Background Art

[0002] Fiber optic connectors are widely used in the field of optical communications. The optical signal is transmitted by connecting the fiber optic connector to the external optical fiber and then inserting the connector into the adapter. The external optical fiber is the bare optical fiber exposed by stripping the protective layer of the optical cable. In order to maintain the stability of the external optical fiber in the connector, a connector is needed to clamp the part of the optical cable containing the protective layer, so as to avoid the displacement of the external optical fiber inside the connector due to the movement of the optical cable outside the connector, thereby affecting the optical signal transmission performance of the connector. Optical cables can be divided into multiple types according to their structures. Since the hole size of the internal cable holder is fixed, the size of the connectable optical cable is also fixed. Therefore, different types of optical cable structures need to be matched with different types of optical fiber connectors, which reduces the versatility of optical fiber connectors and increases the cost of connecting optical fibers of different signals. Summary of the invention

[0003] The purpose of the present invention is to provide an optical fiber connector, which can select a matching optical cable holder according to optical cable structures of different types or sizes, thereby improving the versatility of the optical fiber connector and reducing the cost required to connect different types of optical fibers.

[0004] In order to achieve the above object, the present invention provides an optical fiber connector, comprising:

[0005] A main body, wherein a ferrule end piece is arranged in the main body, and a pre-buried optical fiber is arranged in the ferrule end piece;

[0006] A tail cover, the tail cover is detachably connected to the main body;

[0007] An external optical cable, which is passed through the tail sleeve and extends toward the main body, and includes an external optical fiber;

[0008] A rear sleeve is arranged inside the main body, one end of the rear sleeve is connected to the ferrule end piece, and the other end is detachably connected to a cable holder, and the cable holder clamps the external optical cable so that the external optical fiber extends to connect with the pre-buried optical fiber.

[0009] Compared with the prior art, an optical fiber connector according to an embodiment of the present invention has the following beneficial effects: a core end piece is arranged inside a main body, a pre-buried optical fiber is arranged inside the core end piece, an end of the main body facing away from the adapter is connected to a tail sleeve, an external optical cable is arranged inside the tail sleeve, the external optical cable is passed through the tail sleeve and extends toward the main body, the external optical cable includes the external optical fiber, a rear sleeve is also arranged inside the main body, the rear sleeve is detachably connected to an optical cable holder, the optical cable holder is used to maintain the stability of the external optical cable, so that the external optical fiber can be accurately connected to the pre-buried optical fiber after passing through the optical cable holder; and the optical cable holder and the rear sleeve are designed as a detachable connection structure, and an optical cable holder matching it can be selected according to optical cable structures of different types or sizes, which is easy to operate, greatly improves the versatility of the optical fiber connector, and reduces the cost required to connect different types of optical fibers.

[0010] In the optical fiber connector of the embodiment of the present invention, the end of the rear sleeve facing the ferrule end piece is provided with a first opening groove, and the end of the rear sleeve facing the optical cable retainer is provided with a second opening groove.

[0011] In the optical fiber connector of the embodiment of the present invention, two first opening grooves are provided, and the two first opening grooves are arranged opposite to each other;

[0012] There are two second opening grooves, and the two second opening grooves are arranged opposite to each other.

[0013] In the optical fiber connector of the embodiment of the present invention, the direction of the center line of the two first opening grooves is assumed to be the first direction, the direction of the center line of the two second opening grooves is assumed to be the second direction, and the angle between the first direction and the second direction is φ, where φ satisfies:

[0014]

[0015] In the optical fiber connector of the embodiment of the present invention, a first fastener is provided at one end of the rear sleeve facing the optical cable holder, and a first fastening groove cooperating with the first fastener is provided at one end of the optical cable holder facing the rear sleeve; or

[0016] A first buckling groove is formed at one end of the rear sleeve facing the optical cable holder, and a first buckle matched with the first buckling groove is disposed at one end of the optical cable holder facing the rear sleeve.

[0017] In the optical fiber connector of the embodiment of the present invention, a second fastener is provided at one end of the rear sleeve facing the ferrule end piece, and a second fastening groove cooperating with the second fastener is provided at one end of the ferrule end piece facing the rear sleeve; or

[0018] A second buckling groove is formed at one end of the rear sleeve facing the insert end piece, and a second buckle matched with the second buckling groove is disposed at one end of the insert end piece facing the rear sleeve.

[0019] In the optical fiber connector of the embodiment of the present invention, the external optical fiber and the pre-buried optical fiber are connected by thermal fusion splicing, and a heat shrink tube is sleeved on the outer side of the connection point between the external optical fiber and the pre-buried optical fiber.

[0020] In the optical fiber connector of the embodiment of the present invention, the external optical cable includes an optical fiber protective layer sleeved on the outside of the external optical fiber, the external optical cable also includes an optical cable seal, the optical cable seal is sleeved on the outer surface of the optical fiber protective layer, and the optical cable retainer is clamped on the outer surface of the optical cable seal.

[0021] In the optical fiber connector of the embodiment of the present invention, a locking nut is arranged between the main body and the tail sleeve, and the tail sleeve is connected to the main body through the locking nut.

[0022] In the optical fiber connector of the embodiment of the present invention, a front shell is sleeved on the outer surface of the end of the main body facing away from the tail sleeve, and a sealing ring is provided on the end of the main body extending out of the front shell.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the external structure of the optical fiber connector according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the exploded structure of an optical fiber connector according to an embodiment of the present invention;

[0026] Figure 3 is a schematic cross-sectional structure diagram of an optical fiber connector according to an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a ferrule end piece, a back sleeve and an optical cable retainer of an optical fiber connector according to an embodiment of the present invention;

[0028] In the figure, 1, main body; 11, second sealing ring; 2, tail sleeve; 3, core end piece; 31, second fastener; 4, embedded optical fiber; 5, external optical cable; 51, external optical fiber; 52, optical fiber protective layer; 53, optical cable sealing member; 6, rear sleeve; 61, first opening groove; 62, second opening groove; 63, first fastener; 64, second fastening groove; 7, optical cable retainer; 71, first fastening groove; 8, heat shrink tube; 9, locking nut; 91, first sealing ring; 10, front shell. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, an optical fiber connector of a preferred embodiment of the present invention comprises a main body 1 and a tail sleeve 2, a core end piece 3 is arranged in the main body 1, a pre-buried optical fiber 4 is arranged in the core end piece 3, the pre-buried optical fiber 4 is used to connect to an external optical fiber 51, and the end of the core end piece 3 facing away from the tail sleeve 2 is a plug-in end, which is used to connect to an adapter outside the main body 1; the tail sleeve 2 is detachably connected to the main body 1; and also comprises an external optical cable 5, which is passed through the tail sleeve and extends toward the main body, the external optical cable 5 comprises an external optical fiber 51, the external optical cable 5 extends out of the tail sleeve 2 toward one end of the main body 1 and connects the external optical fiber 51 to the pre-buried optical fiber 4.

[0034] A rear sleeve 6 is also provided in the main body 1, and the rear sleeve 6 extends in the same direction as the main body 1. One end of the rear sleeve 6 is connected to the core end piece 3, and the other end facing the rear sleeve 2 is detachably connected to a cable holder 7. The cable holder 7 is used to maintain the stability of the external optical cable 5. The cable holder 7 clamps the external optical cable 5 and extends the external optical fiber 51 to the pre-buried optical fiber 4, so that the external optical fiber 51 can be accurately connected to the pre-buried optical fiber 4 after passing through the cable holder 7; the present application designs the cable holder 7 and the rear sleeve 6 as a detachable connection structure, and a cable holder 7 matching it can be selected according to optical cable structures of different types or sizes, which is easy to operate and greatly improves the versatility of the optical fiber connector. It only needs to replace the cable holder 7 to connect external optical cables 5 of different sizes or models, which reduces the cost required for connecting optical fibers of different sizes or models and improves the economy of the optical fiber connector.

[0035] like Figure 4 As shown, in some embodiments of the present invention, a first opening groove 61 is provided at one end of the back sleeve 6 facing the core end piece 3, and a second opening groove 62 is provided at one end of the back sleeve 6 facing the optical cable retainer 7, and the two ends of the back sleeve 6 must be connected to the core end piece 3 and the optical cable retainer 7 respectively, wherein the core end piece 3 and the optical cable retainer 7 are both detachably connected to the back sleeve 6, so more deformation margin is required between the back sleeve 6 and the core end piece 3 and the optical cable retainer 7 to ensure the smooth progress of the disassembly process; by arranging the first opening groove 61 and the second opening groove 62 in the connection area between the back sleeve 6 and the core end piece 3 and the optical cable retainer 7, the back sleeve 6 can have better deformation ability in the connection area at its two ends, which is convenient for assembling the core end piece 3 and the optical cable retainer 7.

[0036] In some embodiments of the present invention, two first opening slots 61 are provided, and the two first opening slots 61 are arranged opposite to each other; two second opening slots 62 are also provided, and the two second opening slots 62 are also arranged opposite to each other. The arrangement of multiple first opening slots 61 and second opening slots 62 further enhances the deformation capacity of both ends of the rear sleeve 6, leaving more deformation margins, and the relative arrangement of the positions of the first opening slots 61 and the second opening slots 62 also makes the distance between the opening slots on the same side the farthest, thereby ensuring the deformation capacity of the rear sleeve 2.

[0037] In some embodiments of the present invention, the direction of the center line of the two first opening slots 61 is the first direction X, the direction of the center line of the two second opening slots 62 is the second direction Y, and the angle between the first direction X and the second direction Y is φ, where φ satisfies:

[0038]

[0039] After the first opening groove 61 and the second opening groove 62 are set on both sides of the rear sleeve 6, the rear sleeve 6 has better deformation ability, but a certain deformation stress will also be generated during the deformation process. By setting the angle between the first opening groove 61 and the second opening groove 62 to the above-mentioned angle range, the stress concentration problem caused by the deformation of the rear sleeve 6 can be avoided, the rear sleeve 6 can be kept stable during use, and the service life of the rear sleeve 6 is further improved.

[0040] In some embodiments of the present invention, a first fastener 63 is provided at one end of the back sleeve 6 facing the optical cable retainer 7, and a first fastening groove 71 cooperating with the first fastener 63 is provided at one end of the optical cable retainer 7 facing the back sleeve 6; or a first fastening groove 71 is provided at one end of the back sleeve 6 facing the optical cable retainer 7, and a first fastener 63 cooperating with the first fastening groove 71 is provided at one end of the optical cable retainer 7 facing the back sleeve 6. That is, the first fastener 63 can be arranged on the optical cable retainer 7 or the back sleeve 6, and the first buckling groove 71 can be arranged on the corresponding back sleeve 6 or the optical cable retainer 7. The first fastener 63 can be arranged to protrude outward or inward. When the first fastener 63 protrudes outward, the diameter of the back sleeve 6 where the first fastener 63 is located is smaller than the diameter of the corresponding optical cable retainer 7, or the diameter of the optical cable retainer 7 where the first fastener 63 is located is smaller than the diameter of the corresponding back sleeve 6, so that the first fastener 63 can extend from the inside into the corresponding first buckling groove 71 and buckle with the first buckling groove 71; the end of the first fastener 63 is arranged as an inclined surface, so that it can smoothly withdraw from the first buckling groove 71 after being subjected to force, thereby ensuring the convenience of disassembly and assembly of the first fastener 63 and the first buckling groove 71, and ensuring the convenience of disassembly and assembly of the optical cable retainer 7.

[0041] In some embodiments of the present invention, a second fastener is provided at one end of the rear sleeve 6 facing the core end piece 3, and a second fastening groove cooperating with the second fastener is provided at one end of the core end piece 3 facing the rear sleeve 6; or a second fastening groove 64 is provided at one end of the rear sleeve 6 facing the core end piece 3, and a second fastener 31 cooperating with the second fastening groove 64 is provided at one end of the core end piece 3 facing the rear sleeve 6. That is, the second fastener 31 can be arranged on the core end piece 3 or the back sleeve 6, and the second buckling groove 64 can be arranged on the corresponding back sleeve 6 or the core end piece 3. The second fastener 31 can be arranged to protrude outward or inward. When the second fastener 31 protrudes outward, the diameter of the back sleeve 6 where the second fastener 31 is located is smaller than the diameter of the corresponding core end piece 3, or the diameter of the core end piece 3 is smaller than the diameter of the corresponding back sleeve 6, so that the second fastener 31 can extend into the corresponding second buckling groove 64 from the inside and buckle with the second buckling groove 64. The end of the second fastener 31 is arranged as a slope, so that it can smoothly withdraw from the second buckling groove 64 after being subjected to force, thereby ensuring the convenience of disassembly and assembly of the second fastener 31 and the second buckling groove 64, and ensuring the convenience of disassembly and assembly of the back sleeve 6 and the core end piece 3.

[0042] In some embodiments of the present invention, the external optical fiber 51 is connected to the pre-buried optical fiber 4 by thermal fusion. The connection between the external optical fiber 51 and the pre-buried optical fiber 4 by thermal fusion can improve the light transmission efficiency, reduce the light transmission loss, and have high connection reliability and stability. A heat shrink tube 8 is sleeved on the outside of the connection point between the external optical fiber 51 and the pre-buried optical fiber 4. After the heat shrink tube 8 is heated, the position of the optical fiber can be fixed to prevent the optical fiber from being displaced under the action of a small external force, and at the same time, the fusion joint is protected from moisture and mechanical damage, thereby ensuring the stable transmission of the optical signal.

[0043] In some embodiments of the present invention, the external optical cable 5 includes an optical fiber protective layer 52 sleeved on the outside of the external optical fiber 51 to protect the external optical fiber 51; the external optical cable 5 also includes an optical cable seal 53, which is sleeved on the outer surface of the optical fiber protective layer 52, and the optical cable holder 7 is clamped on the outer surface of the optical cable seal 53. If the optical cable holder 7 is directly clamped on the outside of the optical fiber protective layer 52, the optical fiber protective layer 52 will be subjected to a large clamping force, and in the actual plugging and unplugging application process of the optical fiber connector, the optical fiber protective layer 52 may be stripped or even damaged by the axial clamping force and the radial external force, causing optical signal loss. Through the contact between the optical fiber protective layer 52 and the optical cable seal 53, the clamping force can be indirectly applied to the optical fiber protective layer 52, thereby avoiding the problem of damage to the optical fiber protective layer 52 during the plugging and unplugging process of the connector.

[0044] In some embodiments of the present invention, a locking nut 9 is provided between the main body 1 and the tail sleeve 2, and the tail sleeve 2 is connected to the main body 1 through the locking nut 9. The main body 1 and the tail sleeve 2 are both provided with threads on one end facing the locking nut 9, and the locking nut 9 is also provided with threads facing the main body 1 and the tail sleeve 2 at both ends facing the tail sleeve 2 and the main body 1. The tail sleeve 2 and the main body 1 are connected together through threaded connection, ensuring that the main body 1 and the tail sleeve 2 are firmly fixed and easy to disassemble. Specifically, a first sealing ring 91 is provided between the locking nut 9 and the main body 1, and the first sealing ring 91 seals the gap between the main body 1 and the locking nut 9 to prevent the connection between the external optical fiber 51 and the embedded optical fiber 4 from being affected by the outside.

[0045] In some embodiments of the present invention, the end of the main body 1 facing away from the tail sleeve 2 is connected to the front shell 10, and the end of the main body 1 extending out of the front shell 10 is provided with a second sealing ring 11. The second sealing ring 11 is used to seal the chamber where the ferrule end piece 3 is located when the main body 1 is connected to the adapter, thereby ensuring that the connection between the ferrule end piece 3 and the adapter is not affected by external factors.

[0046] The working process of the present invention is as follows: a core end piece 3 is arranged inside the main body 1, and a pre-buried optical fiber 4 is arranged inside the core end piece 3; the end of the main body 1 facing away from the adapter is connected with a tail sleeve 2 and an external optical cable 5; the external optical cable 5 is passed through the tail sleeve 2 and extends toward the main body 1; a rear sleeve 6 is also arranged inside the main body 1; the rear sleeve 6 is detachably connected with an optical cable holder 7; the optical cable holder 7 is used to maintain the stability of the external optical fiber 51; the optical cable holder 7 is clamped on the outside of the external optical cable 5, and the external optical fiber 51 is extended to the pre-buried optical fiber 4, so that the external optical fiber 51 can be accurately connected to the pre-buried optical fiber 4 after passing through the optical cable holder 7.

[0047] In summary, an embodiment of the present invention provides a fiber optic connector, which designs the optical cable holder 7 and the back sleeve 6 as a detachable connection structure. The optical cable holder 7 that matches the optical cable structure of different types or sizes can be selected. The operation is simple, which greatly improves the versatility of the optical fiber connector and reduces the cost required to connect different types of optical fibers.

[0048] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An optical fiber connector, characterized in that: include: A main body, wherein a ferrule end piece is arranged in the main body, and a pre-buried optical fiber is arranged in the ferrule end piece; A tail cover, the tail cover is detachably connected to the main body; An external optical cable, which is passed through the tail sleeve and extends toward the main body, and includes an external optical fiber; A rear sleeve is arranged inside the main body, one end of the rear sleeve is connected to the ferrule end piece, and the other end is detachably connected to a cable holder, and the cable holder clamps the external optical cable so that the external optical fiber extends to connect with the pre-buried optical fiber.

2. The optical fiber connector according to claim 1, characterized in that: The end of the rear sleeve facing the ferrule end piece is provided with a first opening groove, and the end of the rear sleeve facing the optical cable retaining piece is provided with a second opening groove.

3. The optical fiber connector according to claim 2, characterized in that: There are two first opening slots, and the two first opening slots are arranged opposite to each other; There are two second opening grooves, and the two second opening grooves are arranged opposite to each other.

4. The optical fiber connector according to claim 3, characterized in that: Assume that the direction of the center line connecting the two first opening slots is the first direction, the direction of the center line connecting the two second opening slots is the second direction, and the angle between the first direction and the second direction is φ, where φ satisfies: 55°≤φ≤90°.

5. The optical fiber connector according to claim 1, characterized in that: A first fastener is disposed at one end of the rear sleeve facing the cable holder, and a first fastening groove cooperating with the first fastener is formed at one end of the cable holder facing the rear sleeve; or A first buckling groove is formed at one end of the rear sleeve facing the optical cable holder, and a first buckle matched with the first buckling groove is disposed at one end of the optical cable holder facing the rear sleeve.

6. The optical fiber connector according to claim 1, characterized in that: A second fastener is provided at one end of the rear sleeve facing the insert end piece, and a second fastening groove cooperating with the second fastener is provided at one end of the insert end piece facing the rear sleeve; or A second buckling groove is formed at one end of the rear sleeve facing the insert end piece, and a second buckle matched with the second buckling groove is disposed at one end of the insert end piece facing the rear sleeve.

7. The optical fiber connector according to claim 1, characterized in that: The external optical fiber is butt-jointed with the pre-buried optical fiber by means of thermal fusion splicing, and a heat shrink tube is sleeved on the outer side of the connection point between the external optical fiber and the pre-buried optical fiber.

8. The optical fiber connector according to claim 1, characterized in that: The external optical cable includes an optical fiber protective layer sleeved on the outside of the external optical fiber, and the external optical cable also includes an optical cable seal, which is sleeved on the outer surface of the optical fiber protective layer, and the optical cable retainer is clamped on the outer surface of the optical cable seal.

9. The optical fiber connector according to claim 1, characterized in that: A locking nut is arranged between the main body and the tail sleeve, and the tail sleeve is connected to the main body through the locking nut.

10. The optical fiber connector according to claim 9, characterized in that: A front shell is sleeved on the outer surface of one end of the main body facing away from the tail sleeve, and a sealing ring is arranged on one end of the main body extending out of the front shell.

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