A pull-resistant fiber optic jumper

Abstract

The utility model provides a kind of anti-pulling optical fiber patch cord, it is related to optical fiber patch cord technical field, including outer sheath, one end of outer sheath is equipped with connecting port, the outside of connecting port is fixedly connected with mounting connector, the outside of mounting connector is fixedly equipped with antiskid block, stress reservation cavity is equipped in the inside of outer sheath, the inside of anchoring fixed ring is equipped with spiral reserved layer, when outer sheath is subjected to pulling and generates small displacement, stress reservation cavity provides physical space, and the optical fiber in spiral reserved layer is helically arranged, it has spring-like elasticity, external tension only acts on outer sheath and strong load bearing layer, internal core passes through the slight deformation from helical to straight, offsets length change, ensure that fiber core end face does not come out from plug core, ensure the integrity of signal transmission, when patch cord is subjected to instantaneous, sudden strong pulling, spiral reserved layer can absorb energy by changing pitch, avoid the risk of brittle fracture caused by rigid tension directly acting on core.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic patch cord technology, and in particular to a tensile-resistant fiber optic patch cord. Background Technology

[0002] According to Chinese Patent Publication No. CN203204222U, this utility model discloses an optical fiber patch cord, including a cable core and a sheath outside the cable core. A reinforcing layer is also provided inside the sheath. At least one plastic optical fiber is disposed between the sheath and the reinforcing layer. The sheath is made of transparent or semi-transparent material. In use, when a light source is applied to the plastic optical fiber at the collection end or the user end, the plastic optical fiber in the patch cord will light up. The transparent sheath increases the light transmission effect, making it easy to locate the other end of the optical fiber patch cord. Preferably, two or more plastic optical fibers are disposed between the sheath and the reinforcing layer. This not only makes applying a light source more convenient but also creates at least one spare plastic optical fiber, resulting in higher reliability during use. A protective layer is provided between the sheath and the reinforcing layer. The optical fiber patch cord of this utility model allows for easy location of its other end at the collection end or the user end, eliminating the need to mark each optical fiber patch cord as in existing technologies, thus making installation and maintenance more convenient.

[0003] The aforementioned patent documents and existing technologies have the following technical problems: In traditional technologies, the outer sheath of the fiber optic patch cord will elongate when it is pulled. Since the fiber core is tensioned in a straight line, this displacement difference will be directly converted into a pulling force on the fiber core, causing the fiber to be pulled out from the root of the ceramic ferrule or directly broken. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tensile-resistant fiber optic patch cord.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tensile-resistant fiber optic patch cord, comprising an outer sheath, a connection port at one end of the outer sheath, an installation connector fixedly connected to the outer side of the connection port, an anti-slip block fixedly provided on the outer side of the installation connector, a connector fixedly provided on the inner side of the connection port, and a stress-reserved cavity provided on the inner side of the outer sheath.

[0006] Preferably, the inner side of the outer sheath is provided with a strong load-bearing layer.

[0007] Preferably, the inner side of the strong bearing layer is provided with a plurality of anchoring rings along the axial direction, and the anchoring rings are evenly distributed along the axial direction, and the outer side of the anchoring rings is fitted to the inner side of the strong bearing layer.

[0008] Preferably, the inner side of the anchoring ring is provided with a spiral pre-reserved layer, and the outer side of the spiral pre-reserved layer is fitted with the inner side of the anchoring ring.

[0009] Preferably, the inner side of the spiral pre-reserved layer is provided with a coating layer, and the outer side of the coating layer and the inner side of the spiral pre-reserved layer are bonded together.

[0010] Preferably, the coating layer has a fiber core along the axial direction inside, and the fiber core is evenly distributed along the axial direction and is embedded in the inner side of the coating layer.

[0011] Preferably, the inner side of the anchoring ring is provided with a friction inner tube, and the outer side of the friction inner tube is fitted with the inner side of the anchoring ring.

[0012] Beneficial effects In this invention, a stress-reserved cavity is provided on the inner side of the outer sheath, and a spiral reserved layer is provided on the inner side of the anchoring ring. When the outer sheath is pulled and undergoes a slight displacement, the stress-reserved cavity provides physical space. The optical fiber in the spiral reserved layer, due to its spiral arrangement, has spring-like elasticity. External tension only acts on the outer sheath and the strong bearing layer. The internal fiber core offsets the length change through a slight deformation from a spiral to a straight line, ensuring that the fiber core end face will not come out of the ferrule, thus guaranteeing the integrity of signal transmission. When the patch cord is subjected to instantaneous and sudden strong pulling, the spiral reserved layer can absorb energy by changing the pitch, avoiding the risk of brittle fracture caused by rigid tension acting directly on the fiber core. This greatly improves the impact resistance of the patch cord during construction misoperation or accidental trampling. In this way, when the patch cord is bent at a large angle, the spiral layer can redistribute the internal stress, preventing the optical fiber from undergoing local sharp bending, thereby effectively suppressing the increase of return loss and maintaining low attenuation characteristics. Attached Figure Description

[0013] Figure 1 This is an isometric view of the present invention; Figure 2 This is the first internal isometric view of the present invention; Figure 3 This is the second internal isometric view of the present invention; Figure 4 This is the right view of the present invention.

[0014] Legend: 1. Outer sheath; 2. High-strength load-bearing layer; 3. Anchoring ring; 4. Friction inner tube; 5. Spiral pre-reserved layer; 6. Coating layer; 7. Fiber core; 8. Connecting port; 9. Mounting joint; 10. Anti-slip block; 11. Connecting head; 12. Stress-reserved cavity. Detailed Implementation

[0015] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1: Reference Figure 1-4A tensile-resistant fiber optic patch cord includes an outer sheath 1. One end of the outer sheath 1 has a connector 8. An installation connector 9 is fixedly connected to the outside of the connector 8. An anti-slip block 10 is fixedly installed on the outside of the installation connector 9. The inner side of the outer sheath 1 has a high-strength load-bearing layer 2. Multiple anchoring rings 3 are fixedly installed along the axial direction of the high-strength load-bearing layer 2 on the inner side of the high-strength load-bearing layer 2, and the anchoring rings 3 are evenly distributed along the axial direction. Positioning blocks on the outer side of the anchoring rings 3 are fitted into positioning grooves on the inner side of the high-strength load-bearing layer 2. A friction inner tube 4 is provided on the inner side of the anchoring rings 3. The friction inner tube 4 is a low-friction coefficient inner tube, and the outer side of the friction inner tube 4... The inner side of the inner friction tube 4 is fitted with the inner side of the anchoring ring 3. The outer side of the inner friction tube 4 is fitted with the inner side of the anchoring ring 3. The inner friction tube 4 wraps around the spiral reserved layer 5. A coating layer 6 is provided inside the spiral reserved layer 5, and the outer side of the coating layer 6 is bonded to the inner side of the spiral reserved layer 5. The spiral reserved layer 5 is spirally arranged along the axial direction of the coating layer 6. A fiber core 7 is provided axially inside the coating layer 6, and the fiber cores 7 are evenly arranged circumferentially. The fiber cores 7 are embedded inside the coating layer 6. A connector 11 is fixedly provided inside the connection port 8, and a stress-reserved cavity 12 is provided inside the outer sheath 1. The connector 11 is used for signal connection with an external connector to achieve signal transmission, and the mounting connector 9 is used for fixed connection with an external mounting head to achieve connection fixation. A stress-reserved cavity 12 is provided between the inner side of the outer sheath 1 and the strong bearing layer 2, and a spiral reserved layer 5 is provided on the inner side of the anchoring ring 3. This ensures that when the outer sheath 1 is pulled and undergoes a slight displacement, the stress-reserved cavity 12 provides physical space. Since the optical fiber in the spiral reserved layer 5 is arranged in a spiral shape, it has spring-like elasticity. The external tension only acts on the outer sheath 1 and the strong bearing layer 2. The internal fiber core 7 compensates for the length change through a slight deformation from a spiral shape to a straight shape, ensuring that the end face of the fiber core 7 does not change direction. It will detach from the ferrule, ensuring the integrity of signal transmission. When the patch cord is subjected to instantaneous and sudden strong pulling, the spiral pre-reserved layer 5 can absorb energy by changing the pitch, avoiding the risk of brittle breakage caused by the rigid tension acting directly on the fiber core 7. This greatly improves the impact resistance of the patch cord in case of construction misoperation or accidental trampling. In this way, when the patch cord is bent at a large angle, the spiral layer can redistribute the internal stress, preventing the optical fiber from undergoing local sharp bending, thereby effectively suppressing the increase of return loss and maintaining low attenuation characteristics. Specific Implementation Example 2: Reference Figure 1-4 Based on the basic structure in Specific Embodiment 1, a pair of annular magnetic suction rings are added between the connection port 8 and the mounting connector 9. During the wiring process, the cable is often subjected to torsional force. The traditional crimping structure will transfer the torsional force to the internal fiber core, resulting in micro-bending loss. The magnetic suction interface is equivalent to a universal joint, which can automatically offset the torsional stress and ensure that the shape of the internal spiral reserved layer is not damaged.

[0019] In summary: 1. A stress-reserved cavity 12 is provided on the inner side of the outer sheath 1, and a spiral reserved layer 5 is provided on the inner side of the anchoring ring 3. When the outer sheath 1 is pulled and undergoes a slight displacement, the stress-reserved cavity 12 provides physical space. The optical fiber in the spiral reserved layer 5 is arranged in a spiral shape, which has the elasticity of a spring. The external tension only acts on the outer sheath 1 and the strong bearing layer 2. The internal fiber core 7 offsets the length change through a slight deformation from a spiral shape to a straight shape, ensuring that the end face of the fiber core 7 will not come out of the ferrule, thus ensuring the integrity of signal transmission. When the patch cord is subjected to a sudden strong pull, the spiral reserved layer 5 can absorb energy by changing the pitch, avoiding the risk of brittle fracture caused by the rigid tension acting directly on the fiber core 7. This greatly improves the impact resistance of the patch cord in case of construction misoperation or accidental trampling. In this way, when the patch cord is bent at a large angle, the spiral layer can redistribute the internal stress, preventing the optical fiber from bending sharply in a local area, thereby effectively suppressing the increase of return loss and maintaining low attenuation characteristics.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tensile-resistant fiber optic patch cord, comprising an outer sheath (1), characterized in that: One end of the outer sheath (1) is provided with a connection port (8), and an installation joint (9) is fixedly connected to the outside of the connection port (8). An anti-slip block (10) is fixedly provided on the outside of the installation joint (9). A connector (11) is fixedly provided on the inside of the connection port (8). A strong bearing layer (2) is provided on the inside of the outer sheath (1). Multiple anchoring rings (3) are fixedly provided on the inside of the strong bearing layer (2) along the axial direction. A friction inner tube (4) is provided on the inside of the anchoring rings (3). A spiral reserved layer (5) is provided on the inside of the friction inner tube (4). A coating layer (6) is provided on the inside of the spiral reserved layer (5). A fiber core (7) is provided on the inside of the coating layer (6) along the axial direction. A stress reserved cavity (12) is provided between the inside of the outer sheath (1) and the strong bearing layer (2).

2. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: Multiple anchoring rings (3) are fixed along the axial direction of the strong bearing layer (2), and the anchoring rings (3) are evenly distributed along the axial direction.

3. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: The positioning block on the outer side of the anchoring ring (3) and the positioning groove on the inner side of the strong bearing layer (2) are fitted together.

4. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: The friction inner tube (4) is wrapped with a spiral pre-reserved layer (5).

5. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: The spiral pre-reserved layer (5) is spirally arranged along the axial direction of the coating layer (6), and the outer side of the coating layer (6) and the inner side of the spiral pre-reserved layer (5) are bonded together.

6. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: The fiber cores (7) are arranged evenly in a circle and are embedded inside the coating layer (6).

7. The tensile-resistant fiber optic patch cord according to claim 1, characterized in that: The outer side of the friction inner tube (4) and the inner side of the anchoring ring (3) are fitted together.

Images