Adapter, connector and optical cable fixing structure
By using an adapter with a stepped structure in the optical cable connection to tighten the fiber layer of the optical cable, the problem of plastic deformation and tensile performance degradation of the optical fiber outer jacket is solved, and the reliability and tensile strength of the optical cable connection are improved.
Patent Information
- Application Number
- CN202421284269.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-06-06
AI Technical Summary
During use, existing optical cable connection technology can easily lead to plastic deformation of the fiber outer skin and deteriorate tensile performance, affecting the reliability of the optical fiber for insertion contact, and has high requirements for the density of the internal structure of the optical cable.
The structure of the adapter is adopted, which includes an adapter outer cylinder and an adapter inner cylinder. A first through hole section and a second through hole section are provided in the insertion through hole to form a step structure, and the adapter inner cylinder is placed on the third through hole. In the second through-hole section, the outer diameter is larger than the aperture of the first through-hole section to clamp the fiber layer of the optical cable and transfer the tensile force to the adapter.
It improves the tensile capacity of the optical cable, reduces the impact of the fiber leather's plastic deformation resistance, and reduces the density requirements of the internal structure of the optical cable, and enhances the reliability of the optical cable connection.
Smart Images
Figure CN222394185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of connectors, in particular to a switching piece, a connector and an optical cable fixing structure. Background Art
[0002] Optical fiber is the core part of the optical cable. The optical fiber is protected by some components and its attached protective layer to form an optical cable. Since the optical fiber is usually a double-layer concentric cylinder with a small cross-sectional area made of quartz glass, it is brittle and easy to break. Therefore, the protective structure of the outer layer of the optical fiber can prevent the surrounding environment from damaging the optical fiber. Figure 7 As shown, it includes optical fibers 11 bundled into a bundle, a fiber layer 12 covering the optical fibers, and a protective outer shell 13.
[0003] A connector is a device that makes detachable connections between optical fibers. It precisely connects the two end faces of the optical fiber so that the light energy output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent possible, and the impact on the system caused by its involvement in the optical link can be minimized.
[0004] In order to ensure the reliability of optical fiber docking, it is necessary to ensure that the optical cable is not stressed during connection. In this regard, the existing method is to tightly fix the optical cable on the rear sleeve of the connector through a sealing ring or the like to transfer the force to the connector housing to ensure that the optical cable is not stressed after the connector and the optical cable are connected.
[0005] However, the existing method has the following problems:
[0006] The density requirements for the internal optical fiber, filling and outer skin of the optical cable are relatively high;
[0007] As the use time increases, the outer skin of the optical cable, that is, the outer shell 13, is prone to plastic deformation, and the twisting or tensile performance of the cable deteriorates, affecting the reliability of the optical fiber's plug-in contact. Utility Model Content
[0008] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a switching piece, a connector and an optical cable fixing structure.
[0009] The purpose of the utility model is achieved through the following technical solutions:
[0010] The first aspect of the utility model discloses a transfer component, comprising:
[0011] A transition outer cylinder, wherein the transition outer cylinder has an insertion through hole, wherein the insertion through hole at least comprises a first through hole section and a second through hole section which are arranged in sequence, wherein the inner diameter of the second through hole section is greater than the inner diameter of the first through hole section;
[0012] A transition inner cylinder is placed in the second through hole section and has an outer diameter greater than the aperture of the first through hole section.
[0013] The second aspect of the utility model discloses a connector, comprising:
[0014] An adapter as described in the first aspect;
[0015] A connector housing, wherein a step structure is provided inside the connector housing and abuts against an end of the adapter;
[0016] A wire clamping structure, which is used to clamp the optical cable and is detachably connected to the connector housing;
[0017] A sealing ring is covered on the end of the connector housing.
[0018] The third aspect of the utility model discloses an optical cable fixing structure, comprising:
[0019] A connector as described in the second aspect;
[0020] An optical cable comprises an optical fiber, a fiber layer coated on the outside of the optical fiber, and a protective outer shell placed outside the fiber layer, wherein the optical fiber and the fiber layer at one end are exposed from the protective outer shell, and one end of the fiber layer exposed from the protective outer shell is stuck in the gap between the outer wall of the transition inner cylinder and the transition outer cylinder.
[0021] The utility model has the following advantages:
[0022] This solution uses an adapter to clamp the cable fiber layer, and further transfers the tension on the cable to the adapter through the relationship between the fiber layer and the adapter, thereby avoiding stress on the optical fiber, improving the tensile strength of the optical cable, reducing the impact of the plastic deformation of its outer skin on the tensile strength, and reducing the density requirements for the internal structure of the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 This is a schematic diagram of the first structure of the adapter of the utility model;
[0025] Figure 2 This is a schematic diagram of the second structure of the adapter of the utility model;
[0026] Figure 3This is a third structural schematic diagram of the adapter of the utility model;
[0027] Figure 4 This is a fourth structural schematic diagram of the adapter of the utility model;
[0028] Figure 5 This is a schematic diagram of the structure of the utility model after the adapter and the cable are assembled;
[0029] Figure 6 This is a schematic diagram of the structure of the cable fixing structure of the utility model;
[0030] Figure 7 A schematic diagram of the cable structure. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.
[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] The utility model discloses an adapter, a connector and an optical cable fixing structure, wherein the optical cable fixing structure comprises an optical cable and the connector, and the connector comprises the adapter and a partial structure of an existing connector.
[0038] Specifically, the adapter includes an adapter outer cylinder 2 and an adapter inner cylinder 3. The adapter outer cylinder 2 has a plug-in through hole, which is used for plugging the adapter inner cylinder 3 and the cable. The plug-in through hole at least includes a first through hole section 21 and a second through hole section 22 arranged in sequence, and the inner diameter of the second through hole section 22 is larger than the inner diameter of the first through hole section 21. The adapter inner cylinder 3 is placed in the second through hole section 22 and its outer diameter is larger than the aperture of the first through hole section 21.
[0039] Since the plug-in through hole has at least two through hole sections with different diameters, there will be a step structure between two adjacent through hole sections with different apertures. The adapter inner cylinder 3 is placed in the second through hole section 22. The step structure constitutes the abutment surface of the end face of the adapter inner cylinder 3, so as to clamp the fiber layer of the cable together with the adapter outer cylinder 2, and transfer the force of the cable to the adapter.
[0040] Based on the above principle, the transition outer cylinder 2 and the transition inner cylinder 3 can be implemented by the following various structures.
[0041] Example 1: Reference Figure 1 , 2The plug-in through hole only includes a first through hole section 21 and a second through hole section 22 which are arranged in sequence, wherein the outer diameter of the transition inner cylinder 3 is smaller than or equal to the aperture of the second through hole section 22 .
[0042] in, Figure 1 That is, the outer diameter of the transition inner cylinder 3 is equal to the aperture of the second through hole section 22 . With this structure, when the cable is installed, the fiber layer of the cable is only stuck on the end surface of the transition inner cylinder 3 .
[0043] Figure 2 That is, the outer diameter of the transition inner tube 3 is smaller than the aperture of the second through hole section 22. With this structure, when the cable is installed, the fiber layer of the cable can not only be stuck on the end face of the transition inner tube 3 but also partially be placed in the gap between the outer wall of the transition inner tube 3 and the transition outer tube 2.
[0044] In order to enhance the structural stability of the fiber layer fixation, in this example, it is preferred to use Figure 2 The structure in .
[0045] Example 2: Reference Figure 3 , 4 , the plug-in through hole includes a first through hole section 21, a third through hole section 24, and a second through hole section 22 arranged in sequence, that is, on the basis of the structure of Example 1, a third through hole section 24 is arranged between the first through hole section 21 and the second through hole section 22. Among them, the inner diameter of the third through hole section 24 gradually increases from the end connected with the first through hole section 21 to the end connected with the second through hole section 22, that is, the side wall corresponding to the third through hole section 24 is inclined, and correspondingly, an inclined surface 31 is arranged on the outer wall of the transition inner cylinder 3 corresponding to the third through hole section 24. Preferably, the slope of the inclined surface 31 is equal to the slope of the side wall of the third through hole section 24.
[0046] In this example, as in Example 1, the outer diameter of the transition inner cylinder 3 corresponding to the second through hole section 22 is less than or equal to the aperture of the second through hole section 22. Preferably, the outer diameter of this section is less than the aperture of the second through hole section 22, so that a gap for clamping the cable fiber layer is formed between the outer wall of the transition inner cylinder 3 and the side wall of the second through hole section 22, such as Figure 3 shown.
[0047] The width of the gap is determined by the thickness of the cable fiber layer, with the principle of clamping the fiber layer.
[0048] The structure in Example 2 increases the end face length of the compressed fiber layer by providing the third through hole section 24, thereby improving the stability of fixation while reducing the stress of the fiber layer.
[0049] On the basis of any of the above structures, in order to avoid damage to the fiber layer by the corners of the connecting piece, the connection between the first through hole segment 21 and the third through hole segment 24, the connection between the third through hole segment 24 and the second through hole segment 22, and the end of the inclined surface 31 are all provided with chamfer structures.
[0050] Further, based on any of the above structures, in order to prevent the adapter from radially rotating in the connector housing, the adapter outer cylinder 2 is provided with a first limiting structure 23 that cooperates with the housing to achieve radial rotation limiting. The first limiting structure can be a protrusion structure or a guide groove structure.
[0051] Based on the structure of any of the above adapters, refer to Figure 6 The connector includes a connector housing 51, a wire clamping structure 52, a sealing ring 53 and an adapter of any of the above structures. The connector housing 51, the wire clamping structure 52 and the sealing ring 53 can adopt the same structure as the existing structure. A step structure is provided in the connector housing 51 to abut against the end of the adapter; the wire clamping structure 52 is used to clamp the optical cable and is detachably connected to the end of the connector housing 51; the sealing ring 53 is covered on the end of the connector housing 51.
[0052] If the first limiting structure 23 is a protruding structure, a second limiting structure 54 having a guide groove structure needs to be provided in the connector housing 51. If the first limiting structure 23 is a guide groove structure, a second limiting structure 54 having a protruding structure needs to be provided in the connector housing 51. The guide groove structure is adapted to the protruding structure.
[0053] When the above connector is used to connect the cables, the protective shell 13 at one end of the cable is removed, so that the optical fiber 11 and the fiber layer 12 at the end are exposed outside the protective shell 13. Figure 6 , one end of the fiber layer 12 exposed from the protective shell 13 is stuck in the gap.
[0054] Specifically, during installation, the optical cable is first divided into cables of a certain length, the protective outer shell 13 is removed, and the fiber layer and the optical fiber 11 are scattered, and then the fiber layer is coated along the inclined surface or end surface of the transition inner tube 3. If the outer diameter of the transition inner tube 3 is equal to the aperture of the second through hole section 22, the fiber layer is coated along the end surface or inclined surface of the transition inner tube 3; if the outer diameter of the transition inner tube 3 is smaller than the aperture of the second through hole section 22, the fiber layer is coated along the end surface or inclined surface of the transition inner tube 3 and part of the outer wall of the transition inner tube 3, such as Figure 5 Then, the adapter outer cylinder 2 is inserted into the adapter inner cylinder 3 with the cable to form an adapter. At this time, the inclined surface of the adapter inner cylinder 3 abuts against the inclined surface of the third through hole section 24 to press the fiber layer to fix the cable. In order to enhance the sealing performance and structural stability, a sealant layer 4 can be provided in the adapter outer cylinder 2, that is, a sealant is poured into the adapter outer cylinder 2, such as Figure 5 The sealant may be epoxy glue or other glue with sealing properties.
[0055] Then, the adapter and the connector housing are assembled. At this time, the first limiting structure 23 on the adapter is aligned with the second limiting structure 54 on the connector housing 51 and then pushed in so that the end of the adapter abuts against the step structure of the connector housing 51. Then, the wire clamping structure 52, the sealing ring 53, etc. are assembled. The sealing ring 53 can be a sealing structure such as a rubber ring. Before assembling the sealing ring, the relevant connection parts can be sandblasted and then coated with bonding glue.
[0056] Finally, after assembly, the rubber seal can be vulcanized to ensure the sealing of the cable assembly.
[0057] The above structure is used to realize optical cable connection. During assembly and use, the tension on the cable is transferred to the adapter through the relationship between the fiber layer 12 and the adapter, thereby avoiding stress on the optical fiber and improving the tensile strength of the optical cable.
[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A transfer component, characterized in that ,include: An adapter outer cylinder (2), the adapter outer cylinder (2) having an insertion through hole, the insertion through hole comprising at least a first through hole section (21) and a second through hole section (22) which are arranged in sequence, the inner diameter of the second through hole section (22) being greater than the inner diameter of the first through hole section (21); A transition inner cylinder (3), the transition inner cylinder (3) being disposed in the second through hole section (22) and having an outer diameter greater than the hole diameter of the first through hole section (21).
2. The adapter according to claim 1, characterized in that: A third through hole section (24) is provided between the first through hole section (21) and the second through hole section (22), and the inner diameter of the third through hole section (24) gradually increases from the end connected with the first through hole section (21) to the end connected with the second through hole section (22); An inclined surface (31) is provided on the outer wall of the transition inner cylinder (3) at a position corresponding to the third through hole section (24).
3. The adapter according to claim 2, characterized in that: The connection between the first through hole segment (21) and the third through hole segment (24), the connection between the third through hole segment (24) and the second through hole segment (22), and the end of the inclined surface (31) are all provided with chamfered structures.
4. The adapter according to claim 1, characterized in that: The adapter outer cylinder (2) is provided with a first limiting structure (23) that cooperates with the outer shell to achieve radial rotation limiting.
5. The adapter according to claim 4, characterized in that: The first limiting structure (23) is a protrusion structure or a guide groove structure.
6. The adapter according to claim 1, characterized in that: The outer diameter of the transition inner cylinder (3) is smaller than the hole diameter of the second through hole section (22).
7. A connector, characterized in that: include: An adapter as claimed in any one of claims 1 to 6; A connector housing (51), wherein a step structure is provided inside the connector housing (51) and abuts against an end of the adapter; A wire clamping structure (52), the wire clamping structure (52) being used to clamp the optical cable and being detachably connected to the connector housing (51); A sealing ring (53), the sealing ring (53) covering the end of the connector housing (51).
8. A connector according to claim 7, characterized in that: A second limiting structure (54) adapted to the first limiting structure (23) is arranged in the connector housing (51).
9. An optical cable fixing structure, characterized in that: include: A connector according to any one of claims 7 to 8; An optical cable, comprising an optical fiber (11), a fiber layer (12) coated on the outside of the optical fiber, and a protective outer shell (13) disposed outside the fiber layer (12), wherein the optical fiber (11) and the fiber layer (12) at one end are exposed outside the protective outer shell (13), and the end of the fiber layer (12) exposed outside the protective outer shell (13) is stuck in the gap between the outer wall of the transition inner cylinder and the transition outer cylinder.
10. The optical cable fixing structure according to claim 9, characterized in that: A sealing rubber layer (4) is provided inside the transition outer cylinder (2).