Separable optical fiber connector

Abstract

The utility model discloses a separable optical fiber connector, which belongs to the technical field of separable optical fiber connectors, and comprises an insertion core assembly, an inner frame sleeve, a connector main body and a crimping assembly. The optical fiber connector can be disassembled and assembled in a split mode after the insertion core assembly and the optical fiber are connected and fixed, and the requirement for disassembling and assembling in a split mode after the preformed end optical fiber connector is arranged is met. The optical fiber connector capable of being split is simple in structure and convenient to assemble and disassemble, the assembling and disassembling process of the optical fiber connector can be effectively simplified, bending state inspection before the optical fiber and the insertion core are fixed is achieved, the situation that the optical fiber is excessively bent due to the fact that the optical fiber is reserved to be too long is avoided, additional attenuation is reduced, and the application reliability of an optical cable is improved. Conditions are provided for air-blowing laying of the optical cable.

Description

Technical Field

[0001] The utility model belongs to the technology of separable optical fiber connector, in particular to a separable optical fiber connector. Background Art

[0002] Prefabricated separable fiber optic connectors are prefabricated separable fiber optic connectors, which are characterized by pre-installed separable fiber optic connector end faces, and are usually end face polished and tested in the factory. This type of connector can be quickly and easily connected to optical cables or other connectors, and has higher connection performance and longer service life. The use of prefabricated separable fiber optic connectors can effectively reduce the number and time of on-site production of separable fiber optic connectors, thereby improving work efficiency. For this reason, the use of prefabricated separable fiber optic connectors is becoming more and more common.

[0003] However, although the pre-terminated detachable optical fiber connector has the aforementioned advantages, it also has obvious disadvantages in actual use, mainly concentrated in the following aspects:

[0004] First of all, when it comes to the use of fiber optic connectors, they often need to go through processes such as glue injection, curing, and grinding during the docking process with optical cables, which requires the use of more equipment, resulting in the assembly and application of fiber optic connectors mostly being completed in factories; for the few fiber optic connectors that can be installed on-site, most of them are no longer used due to their poor stability.

[0005] At the same time, the structure of existing pre-assembled detachable optical fiber connectors is often complex, the size of the connector is large, and the connector cannot be disassembled after assembly, which makes it difficult to apply it to some special applications, such as air-blowing scenarios. Driven by the "fiber to the home" policy, air-blown optical cable technology has been widely used. In most cases, the size of the pipe used for air blowing mostly corresponds to the diameter of the optical cable at the home section, generally around 3~4mm; and conventional optical fiber connectors require at least 11mm inner diameter pipes after completing the connection of the cable ends, which will greatly waste pipe space. For this reason, it is difficult to use optical cables with optical fiber connectors for air blowing in the existing technology, which to a certain extent affects the sustainable development of air blowing technology.

[0006] In addition, like ordinary separable optical fiber connectors, the main part of the prefabricated separable optical fiber connector is closed during the manufacturing process, and the internal space is difficult to observe. The length of the long fiber from the connector to the ferrule end cannot be observed, especially for optical cables with tight structures, where the optical fiber and the aramid fiber or sheath inside the optical cable are difficult to move. When two connectors are docked, the ferrule will retreat to a certain extent. If the length of the optical fiber inside the connector is not accurately controlled, it is very easy to cause the optical fiber bending radius to be too small due to the excessive length of the optical fiber, thereby causing excessive attenuation. In response to this problem, the current conventional practice in the industry is to make the ferrule structure and the optical cable fixed structure linked, and the ferrule will retreat with the optical cable during the retreat process, so as to overcome the defect that the ferrule retreat causes the optical fiber bending radius to be too small and thus causes excessive attenuation. Although the above method can overcome the above problems to a certain extent, it brings a new problem, that is, the connector with the above linkage structure cannot withstand tensile force. If the optical cable is subjected to tensile force, the ferrule will also be linked, resulting in the interruption of the optical path of the connector, thereby affecting the normal use of the connector and even the optical path. Utility Model Content

[0007] In response to one or more of the above defects or improvement needs in the prior art, the utility model provides a separable fiber optic connector, which can realize the separable disassembly of the connector body at the end of the optical cable after the optical fiber and the ferrule are fixedly assembled, thereby meeting the structural disassembly and assembly requirements of the pre-terminated fiber optic connector after assembly at the end of the optical cable.

[0008] To achieve the above-mentioned purpose, the utility model provides a separable optical fiber connector, comprising a housing, a core assembly, an inner frame sleeve and a connector body that can be assembled and connected as one; and also comprising a crimping assembly;

[0009] The ferrule assembly comprises a ferrule and a spring; one end of the ferrule is a ferrule end with a ferrule end face, and the other end is a ferrule tail handle for plugging and fixing with the end of the optical fiber; the spring can be sleeved on the outer periphery of the ferrule tail handle and axially limited;

[0010] A connecting through hole is axially provided in the middle of the connector body, and a longitudinal section hole is provided on the outer periphery of one side thereof, which axially penetrates both ends of the connector body and radially penetrates the connecting through hole; a step surface is formed at one end of the connecting through hole for limiting the position of the spring after being embedded; and a limiting hole is provided in the annular direction on the inner wall surface of the middle part of the connecting through hole, and a notch with an opening width not less than the inner diameter of the limiting hole is provided at a position of the longitudinal section hole directly opposite to the limiting hole;

[0011] The inner frame sleeve is a hollow structure, one end of which can be detachably sleeved with the first end of the connector body, and after the sleeve connection is completed, the ferrule is axially limited to one end of the connector body;

[0012] The crimping assembly includes a crimping body and a crimping ring; a through hole is opened on the crimping body for passing the optical fiber after the end of the optical cable is stripped; the crimping ring and the crimping body can be assembled and connected, and the crimping ring can crimp the reinforcing element of the stripped optical cable onto the crimping body after the optical fiber passes through the crimping body; the outer diameter of the crimping body corresponds to the inner diameter of the limiting hole, and the opening width of the longitudinal section hole between the limiting hole and the rear end of the connector body is not less than the maximum value of the outer diameter of the optical cable and the outer diameter of the crimping ring.

[0013] As a further improvement of the present invention, one end of the inner frame sleeve is provided with an end notch axially penetrating inside and outside the sleeve body, and the end notch can be aligned with the longitudinal section hole when the inner frame sleeve is sleeved on the connector body.

[0014] As a further improvement of the utility model, a limiting end with an outer diameter larger than the insert end and the insert tail handle is formed in the middle of the insert, and an anti-rotation hole corresponding to the outer contour of the limiting end is formed in the middle of the inner frame sleeve, and the limiting end can only be embedded in the anti-rotation hole in a unique alignment state.

[0015] As a further improvement of the present invention, the limit end is obtained by opening at least one anti-rotation cut surface on the outer circumference of the cylindrical structure, and the anti-rotation cut surface extends from the side of the limit end close to the core end to the middle of the limit end, and forms a limit step in the middle of the limit end.

[0016] As a further improvement of the utility model, the crimping body comprises a column for the crimping ring to be sleeved and an end cap arranged at one end of the column and having an outer diameter greater than the outer diameter of the column;

[0017] The outer diameter of the end cap corresponds to the outer diameter of the limiting hole, and can be radially embedded in the limiting hole.

[0018] As a further improvement of the present utility model, the opening width of the longitudinal section hole between the limiting hole and the first end of the connector body is not greater than the outer diameter of the spring.

[0019] As a further improvement of the utility model, it also includes a tail sleeve;

[0020] The inner diameter of the tail sleeve is not less than the outer diameter of the optical cable, and is also not less than the maximum outer diameter of the crimping assembly; and one end of the tail sleeve can be detachably connected to the tail end of the connector body.

[0021] As a further improvement of the present invention, the connector body is a multi-section structure, which includes a first connecting end and a second connecting end respectively disposed at two ends, and a limiting portion disposed between the two connecting ends;

[0022] The limiting hole is arranged in the limiting portion, and the outer diameter of the limiting portion is larger than the outer diameters of the two connecting ends, and annular step surfaces are respectively formed at positions connected to the two connecting ends.

[0023] As a further improvement of the present invention, a connecting component is provided between the first connecting end and the inner frame sleeve; and / or a connecting component is provided between the second connecting end and the tail sleeve.

[0024] As a further improvement of the present invention, a connecting component is provided between the first connecting end and the inner frame sleeve; and / or a connecting component is provided between the second connecting end and the tail sleeve.

[0025] As a further improvement of the present invention, a dust cap is further provided corresponding to the ferrule, and the dust cap can be provided corresponding to the end of the ferrule end.

[0026] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0027] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0028] (1) The separable optical fiber connector of the utility model comprises a ferrule assembly, an inner frame sleeve, a connector body and a crimping assembly. By means of the corresponding longitudinal holes and limit holes on the connector body, the arrangement of the crimping assembly and the preferred design of the corresponding structural dimensions, a reliable connection between the end of the optical cable and the connector body can be achieved after the optical fiber and the ferrule assembly are fixedly assembled. While ensuring that the optical cable assembled with the optical fiber connector has a certain tensile strength, the optical fiber connector at the end of the optical cable has the ability to be separably assembled and disassembled. This can not only ensure the docking reliability of the optical fiber connector during use, but also provide conditions for certain special applications of the optical cable (such as air-blowing laying), thereby increasing the convenience and flexibility of the use of the optical fiber connector.

[0029] (2) The separable optical fiber connector of the utility model utilizes the combination of the notch at the end of the inner frame sleeve and the longitudinal section hole on the connector body to observe and judge the bending degree of the optical fiber before the ferrule assembly is connected and fixed to the optical fiber, thereby improving the accuracy of the assembly of the optical fiber and the ferrule assembly, avoiding excessive bending of the optical fiber due to excessive reserved length, reducing additional attenuation, and improving the reliability of optical fiber signal transmission.

[0030] (3) The separable optical fiber connector of the utility model has a limit end in a non-rotating structure in the middle of the ferrule, and an anti-rotation hole matching the outer contour of the limit end in the middle of the inner frame sleeve, so that when the ferrule is embedded in the inner frame sleeve, its peripheral circumferential position can only match the anti-rotation hole of the inner frame sleeve in a unique alignment state, thereby ensuring that after the ferrule is assembled with the inner frame sleeve and the connector body, the circumferential position state of the ferrule end face remains unique, thereby meeting the assembly requirements under specific needs, such as the assembly requirements for a ferrule with an APC end face (the ferrule end face has a certain inclination angle).

[0031] (4) The separable optical fiber connector of the utility model optimizes the opening width of the two hole sections in the longitudinal section hole so that the setting of the first hole section can not only meet the needs of observation and judgment, but also enable the end of the ferrule connected to the spring to achieve radial limitation after the crimping assembly is embedded in the limiting hole, thereby ensuring the reliability of the combined setting of the ferrule assembly, optical fiber, and connector body; and the optimal design of the size of the second hole section enables the crimping assembly and the optical cable at its tail end to be directly embedded in the connector body along the radial direction. In combination with the setting of the first hole section, the optical cable and the connector body can be accurately connected, simplifying the setting process of the optical fiber connector at the end of the optical cable.

[0032] (5) The separable optical fiber connector of the utility model has a simple structure and is easy to assemble and disassemble. The combination of various components can effectively simplify the assembly and disassembly process of the optical fiber connector, and realize the bending state check before the optical fiber and the ferrule are fixed, thereby avoiding excessive bending of the optical fiber due to the excessive length of the optical fiber reserved, reducing additional attenuation, and improving the reliability of optical cable transmission and application. It also provides conditions for the application of optical cables in conventional air-blown laying scenarios, and has good practical value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the disassembly of the structure of the separable optical fiber connector in the embodiment of the utility model;

[0035] Figure 2 It is a schematic diagram of the overall structure of a separable optical fiber connector in an embodiment of the utility model;

[0036] Figure 3 It is a schematic diagram of the ferrule structure of a separable optical fiber connector in an embodiment of the utility model;

[0037] Figure 4 , Figure 5 It is a schematic diagram of the inner frame structure of the separable optical fiber connector in the embodiment of the utility model;

[0038] Figure 6 , Figure 7 It is a structural schematic diagram of a connector body of an optical fiber connector in an embodiment of the utility model;

[0039] Figure 8 It is a schematic structural diagram of a crimping assembly of a separable optical fiber connector in an embodiment of the utility model;

[0040] Fig. 9 It is a schematic diagram of the tail sleeve of the separable optical fiber connector in the embodiment of the utility model;

[0041] Fig.10 It is a structural schematic diagram of a traction sheath provided in a corresponding plug assembly in an embodiment of the utility model;

[0042] Figure 11~Figure 17 It is a schematic diagram of assembling and connecting an optical cable with an optical fiber connector in an embodiment of the utility model;

[0043] Figure 18-19 It is a schematic diagram of the assembly of the optical cable and the traction sheath during air blowing laying after the optical fiber connector is assembled in the embodiment of the utility model;

[0044] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0045] 1. Shell; 2. Insert assembly; 3. Inner frame; 4. Connector body; 5. Crimp assembly; 6. Tail sleeve; 7. Optical cable; 8. Traction sheath;

[0046] 201, insert; 2011, limit step; 2012, anti-rotation section; 202, spring; 203, dust cap; 301, set hole; 302, anti-rotation hole; 303, sleeve hole; 304, end notch; 401, first connecting end; 402, second connecting end; 403, limit part; 404, longitudinal hole; 4041, first hole section; 4042, second hole section; 405, limit hole; 406, annular step; 407, first connecting protrusion; 408, second connecting protrusion; 501, crimping body; 502, crimping ring; 601, connecting groove; 602, circumferential groove; 701, optical fiber; 702, reinforcing element; 703, outer sheath; 801, central blind hole; 802, lateral through groove; 803, traction hole. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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 referred device or element 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.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] Example:

[0053] See also Figure 1 to Figure 9 The separable optical fiber connector in the preferred embodiment of the utility model comprises a housing 1 which can be assembled and connected to the end of an optical cable 7, a core assembly 2, an inner frame sleeve 3, a connector body 4, a crimping assembly 5 and a tail sleeve 6.

[0054] Specifically, the outer shell 1 in the preferred embodiment is a square sleeve-shaped structure, which can be sleeved on the outer circumference of the inner frame sleeve 3 and one end of the connector body 4 to protect the end of the optical fiber connector to be connected.

[0055] In actual configuration, the housing 1 is a rectangular sleeve structure with a hollow interior, and connection components for detachably connecting to the inner frame sleeve 3 and / or the connector body 4 are provided on both sides thereof.

[0056] More preferably, the above-mentioned connecting component can be a snap-on connecting component, or a connecting component composed of a spring and a slot; of course, according to the needs of actual settings, the above-mentioned connecting component can also be set to other forms, as long as it can achieve a detachable connection of the shell 1, which will not be elaborated here.

[0057] At the same time, if Figure 1 , Figure 3 As shown in the figure, the ferrule assembly 2 in the preferred embodiment includes a ferrule 201 with a columnar structure, and the ferrule 201 is preferably a multi-section structure, including a ferrule end with a ferrule end face, a limiting end for achieving limiting, and a ferrule tail handle for connecting to the optical fiber at the end of the optical cable 7.

[0058] The ferrule end is a cylindrical structure, and its end has been end-face ground and tested in the factory and has a ferrule end face, so that the ferrule 201 can be quickly and conveniently connected to an optical cable or other connector.

[0059] In actual production, according to different application scenarios, the configuration of the ferrule end face will be different, mainly reflected in the two situations that the ferrule end face is a radial end face or an inclined face, corresponding to the UPC end face and the APC end face when designing the optical fiber connector. For the two different end face forms, there are different requirements for the assembly of the ferrule 201 in the optical fiber connector. Among them, for the inclined ferrule end face, it is necessary to ensure the displacement of the assembly position relationship between the ferrule 201 and the connector body 4 and the inner frame sleeve 3, that is, the circumferential position state of the ferrule end face relative to the inner frame sleeve 3 remains unique.

[0060] like Figure 3 As shown in , the limiting end in the preferred embodiment is coaxially connected with the ferrule end, and is preferably a cylindrical structure with an outer diameter larger than the outer diameter of the ferrule end. At the same time, at least one anti-rotation cut surface 2012 is cut along the axial direction on the outer periphery of the limiting end, for example, 2 or 3 anti-rotation cut surfaces 2012 are arranged at intervals in the circumferential direction, and the anti-rotation cut surface 2012 extends from the end of the limiting end close to the ferrule end surface to the middle of the limiting end, and forms a limiting step 2011 in the middle of the limiting end.

[0061] Correspondingly, an anti-rotation hole 302 corresponding to the outer peripheral contour of the end of the limiting end having the anti-rotation cut surface 2012 is also provided in the inner frame sleeve 3. Figure 5 As shown in the figure, when the inner frame sleeve 3, the core assembly 2 and the connector body 4 are assembled and connected, the end of the limiting end with the anti-rotation cut surface 2012 can be just axially embedded in the anti-rotation hole 302, and the axial limit is performed by the limiting step 2011 in the middle of the limiting end.

[0062] By using the anti-rotation cut surface 2012 on the outer periphery of the limiting end to correspond to the inner wall surface of the anti-rotation hole 302, the anti-rotation connection between the ferrule 201 and the inner frame sleeve 3 can be accurately achieved. At the same time, by preferably designing the number of the anti-rotation cut surface 2012, for example, setting it to an odd number, it can also effectively ensure that the limiting end can only be matched into the inner frame sleeve 3 in a unique embedded state, thereby ensuring the uniqueness of the relative position state of the ferrule end face after the optical fiber connector is assembled and connected, and meeting the assembly requirements of the ferrule 201 under special end face forms.

[0063] It can be understood that, if only for the anti-rotation requirement, in addition to the aforementioned setting form, the limit end in the preferred embodiment can also be set to other forms, such as a non-rotating body structure with an outer contour of square, elliptical, etc.; of course, even if the limit end is set to a rotating body structure, the anti-rotation assembly between the core 201 and the inner frame sleeve 3 can be achieved by setting a corresponding anti-rotation mechanism (such as a combination of protrusions and grooves) between the limit end and the inner frame sleeve 3.

[0064] In fact, corresponding to the insert 201 and the inner frame sleeve 3 in the preferred embodiment, it is sufficient as long as the axial movable assembly of the two can be achieved so that the insert 201 can only perform axial reciprocating motion relative to the inner frame sleeve 3.

[0065] Furthermore, in the preferred embodiment, the ferrule tail handle of the ferrule 201 is arranged on the side of the limiting end away from the ferrule end, is coaxially arranged with the limiting end, and has a ferrule hole for inserting the optical fiber end in the middle along the axial direction.

[0066] In actual setting, the outer diameter of the ferrule tail handle is smaller than the outer diameter of the limit end, and an annular step is formed at the connection between the two, such as Figure 3 At the same time, a spring 202 is sleeved on the outer periphery of the ferrule tail handle, one end of the spring 202 abuts against the annular step, and the other end can abut against the annular step 406 formed at one end of the connector body 4 after the ferrule assembly 2 is docked with the connector body 4.

[0067] The combination of the spring 202 and the ferrule 201 can provide a buffer for the axial expansion and contraction of the ferrule 201 (mainly the inward retraction of the ferrule 201 relative to the connector body 4) while ensuring that the ferrule 201 has the ability to axially expand and contract. A certain elastic force, usually 7.8~11.8N, is applied to the ferrules 201 of the two optical fiber connectors after docking, thereby ensuring the stability and reliability of the docking of the optical fibers 701.

[0068] For the inner frame sleeve 3 in the preferred embodiment, its structure is as follows: Figure 4 , Figure 5 As shown in the figure, it has a stepped through hole, which can be sleeved on the head end of the connector body 4 and limit the ferrule 201 in the connecting through hole at the head end of the connector body 4. Of course, since the tail end of the ferrule 201 is limited and assembled with the head end of the connector body 4 through the spring 202, after the inner frame sleeve 3 axially limits the ferrule 201, the ferrule 201 can also move axially by compressing the spring 202.

[0069] In more detail, in addition to the aforementioned anti-rotation hole 302, the through hole in the middle of the inner frame sleeve 3 also includes a sleeve hole 301 and a sleeve hole 303 respectively arranged at the axial ends of the anti-rotation hole 302; the former is used for the insertion of the core end of the plug 201, and an assembly space is reserved for the dust cap 203 to be covered at the end of the plug 201, that is, the inner diameter of the sleeve hole 301 is larger than the outer diameter of the core end of the plug 201, and a space for assembling the dust cap 203 is formed between the two.

[0070] Meanwhile, the sleeve hole 303 in the preferred embodiment is arranged corresponding to the first connection end 401 of the connector body 4 , and can be sleeved on the first connection end 401 and detachably connected to the first connection end 401 .

[0071] It can be understood that in order to achieve a detachable connection between the sleeve hole 303 and the first connection end 401, a connection component is provided between the inner frame sleeve 3 and the connector body 4. In a preferred embodiment, the above-mentioned connection component is preferably a combination of a connection buckle and a connection protrusion. Specifically, connection buckles are respectively provided on both sides of the end of the inner frame sleeve 3 where the sleeve hole 303 is provided, and a first connection protrusion 407 is provided on the periphery of the first connection end 401 of the connector body 4. When the sleeve hole 303 is sleeved on the periphery of the first connection end 401, the connection buckle can just pass over the first connection protrusion 407 and achieve axial locking between the inner frame sleeve 3 and the connector body 4.

[0072] Of course, according to the actual setting requirements, the above-mentioned connection assembly can also be set in other forms, as long as it can achieve a detachable connection between the inner frame sleeve 3 and the connector body 4. For example, the connection buckle is replaced with a corresponding form of connection slot, and the detachable connection is completed by matching the connection slot with the first connection protrusion 407.

[0073] Preferably, in actual setting, an end notch 304 is axially opened on the outer periphery of one end of the inner frame sleeve 3 corresponding to the sleeve hole 303, and the end notch 304 corresponds to the longitudinal section hole 404 opened on the outer periphery of the connector body 4, so that after the inner frame sleeve 3 is sleeved on the first connecting end 401, the end notch 304 can be radially aligned with the longitudinal section hole 404, and then the setting state of the end of the core assembly 2 can be observed through the end notch 304 and the longitudinal section hole 404.

[0074] In order to simplify the alignment process of the inner frame sleeve 3, in actual setting, the end notches 304 are arranged in two radial directions opposite to each other, and the upper and lower sides of the inner frame sleeve 3 ( Figure 1 The upper and lower parts (under the viewing angle shown) are arranged in a symmetrical form, so that the alignment and connection process of the inner frame sleeve 3 can be effectively simplified.

[0075] Furthermore, if Figure 1 , Figure 6 , Figure 7 As shown in the figure, the connector body 4 in the preferred embodiment is a multi-section tubular structure, which includes a first connecting end 401 and a second connecting end 402 respectively arranged at both ends, and a limiting portion 403 is arranged between the two connecting ends. The three are coaxially arranged in sequence, and a through connecting hole is opened axially in the middle of the three.

[0076] In actual setting, the first connecting end 401 is used to connect to one end of the inner frame sleeve 3, and the second connecting end 402 is used to connect to the tail sleeve 6. In this way, in order to realize the positioning of the inner frame sleeve 3 and the tail sleeve 6 when they are connected to the connector body 4, it is preferred to set the limiting portion 403 to have an outer diameter greater than the outer diameters of the two connecting ends, and form an annular step surface at the position where the limiting portion 403 is connected to the two connecting ends, which is used for axial limitation of the inner frame sleeve 3 and the tail sleeve 6.

[0077] In more detail, the two connecting ends in the preferred embodiment are cylindrical structures, and accordingly, circular connecting holes (such as sleeve holes 303) are formed on the inner frame sleeve 3 and the tail sleeve 6 respectively. At the same time, the limiting portion 403 in the preferred embodiment is preferably a square columnar structure, such as Figure 6 as shown in .

[0078] More specifically, a longitudinal section hole 404 which radially penetrates the connecting through hole is opened on the outer periphery of the connector body 4, and both ends of the longitudinal section hole 404 penetrate the end portions of the two connecting ends in the longitudinal direction.

[0079] By opening the longitudinal hole 404, a window can be formed on the connector body 4 for observing the status of the optical fiber 701 after connection with the ferrule 201, which facilitates the corresponding adjustment of the optical fiber 701 before gluing and fixing, thereby avoiding the optical fiber 701 having a too small bending radius during the docking process of the ferrule assembly 2 due to the reserved length of the optical fiber 701 being too long, thereby avoiding excessive attenuation due to excessive bending of the optical fiber 701.

[0080] Furthermore, when actually opened, the longitudinal section hole 404 includes a first hole section 4041 opened at the periphery of the first connection end 401 and a second hole section 4042 opened at the periphery of the second connection end 402. The second hole section 4042 extends to the limiting portion 403 and communicates with the limiting hole 405 opened on the limiting portion 403.

[0081] In a preferred embodiment, the limiting hole 405 is coaxially opened with the connecting through hole, and its inner diameter is larger than the inner diameter of the connecting through holes at both ends, that is, a structure with a sudden change in inner diameter is formed on the limiting portion 403; accordingly, the limiting hole 405 is radially connected to the longitudinal section hole 404, and the opening width of the limiting hole 405 penetrating the outer periphery of the limiting portion 403 is not less than the inner diameter of the limiting hole 405, so that the component corresponding to the inner diameter of the limiting hole 405 can be embedded in the limiting hole 405 through its opening along the radial direction.

[0082] Since the inner diameter of the limiting hole 405 is larger than the inner diameters of the through holes at both ends thereof, annular step surfaces are formed on both sides of the limiting hole 405 along the axial direction, and then the component embedded in the limiting hole 405 can achieve axial limitation through the two annular step surfaces.

[0083] In actual configuration, the end of the second hole segment 4042 preferably extends to the opening of the limiting hole 405 , and the opening width of the second hole segment 4042 is smaller than the opening width of the limiting hole 405 .

[0084] Preferably, the end of the first hole section 4041 also preferably extends to the opening of the limiting hole 405. Figure 6 as shown in .

[0085] Furthermore, in a preferred embodiment, the opening width of the first hole segment 4041 is larger than the outer diameter of the optical fiber 701 and is not larger than the minimum outer diameter of the ferrule 201. This arrangement can ensure that after the ferrule assembly 2 is installed in the first connection end 401, the main body of the ferrule assembly 2 will not radially escape from the first hole segment 4041.

[0086] Of course, in order to facilitate the operator to observe the bending of the optical fiber 701 and the ferrule 201 through the first hole section 4041 after assembly and docking, the opening width of the first hole section 4041 in the preferred embodiment should not be too small.

[0087] In a specific preferred embodiment, the opening width of the first hole section 4041 is preferably 0.5 to 1.0 times the minimum outer diameter of the ferrule 201. At this time, the minimum outer diameter of the ferrule 201 is the outer diameter of the ferrule tail handle.

[0088] In more detail, the inner diameter of the connecting through hole radially connected to the second hole segment 4042 is preferably not less than the outer diameter of the optical cable 7, and correspondingly, the opening width of the second hole segment 4042 is also not less than the outer diameter of the optical cable 7, so that the optical cable 7 can be radially embedded in the connecting through hole through the second hole segment 4042.

[0089] Furthermore, the crimping assembly 5 in the preferred embodiment is used for crimping and assembling with the reinforcing element 702 of the optical cable 7 after the outer sheath 703 is stripped off, and comprises a crimping body 501 in a "screw shape" and a crimping ring 502 in a "sleeve shape". The crimping body 501 comprises an end cap and a column with an outer diameter smaller than the outer diameter of the end cap, and the inner diameter of the crimping ring 502 corresponds to the outer diameter of the column, so that the crimping ring 502 can be correspondingly sleeved on the outer circumference of the column.

[0090] In actual configuration, considering that the reinforcing element 702 needs to be locked between the crimping ring 502 and the column, the inner diameter of the crimping ring 502 is preferably slightly larger than the outer diameter of the column. In addition, the outer diameter of the end cap of the crimping body 501 corresponds to the inner diameter of the limiting hole 405 and is larger than the outer diameter of the crimping ring 502.

[0091] To facilitate embedding of the crimping ring 502 in the connecting through hole after sleeve connection, in a preferred embodiment, the opening width of the second hole section 4042 is not less than the maximum value between the outer diameter of the crimping ring 502 and the outer diameter of the optical cable 7, and is further preferably equal to the maximum value.

[0092] Such an arrangement can ensure that both the end of the crimping assembly 5 and the unstripped optical cable 7 can be radially embedded into the connecting through hole through the second hole section 4042 .

[0093] It should be noted that a through hole is axially provided in the middle of the crimping body 501 for passing the optical fiber 701 in the stripped optical cable 7 .

[0094] By stripping the end of the optical cable 7 to be assembled with the optical fiber connector, passing the stripped optical fiber 701 through the through hole in the middle of the crimping body 501, and then holding the reinforcing element 702 on the outer periphery of the optical fiber 701 on the crimping body 501 by the crimping ring 502, the crimping assembly 5 can be reliably connected to the end of the stripped optical cable 7, so that the crimping assembly 5 and the optical cable 7 are connected as an integral structure in the axial direction. In this way, by embedding the crimping assembly 5 in the limiting hole 405 for axial limiting, the optical cable 7 can be tightly connected to the connector body 4 in the axial direction through the crimping assembly 5, thereby avoiding the axial relative displacement of the optical cable 7 with the connector body 4 when the optical cable 7 is subjected to tension.

[0095] By utilizing the above arrangement, the optical cable 7 and the optical fiber connector are able to withstand a certain tensile force after being assembled and connected, thereby avoiding the defect that the conventional linkage structure optical fiber connector has no tensile resistance after docking.

[0096] Furthermore, a tail sleeve 6 is provided corresponding to the second connection end 402 of the connector body 4, and the tail sleeve 6 is preferably made of rubber material and has a certain deformation ability.

[0097] In a preferred embodiment, the tail sleeve 6 is in a long tubular structure with a through hole in the middle thereof. The inner diameter of the through hole is not less than the outer diameter of the optical cable 7 , so as to facilitate installation of the tail sleeve 6 around the outer periphery of the optical cable 7 .

[0098] Further preferably, the inner diameter of the through hole is not less than the maximum value of the outer diameters of the ferrule 201 , the spring 202 , the crimping assembly 5 , and the optical cable 7 , so that the tail sleeve 6 can axially pass through the assembled ferrule assembly 2 , the crimping assembly 5 , and be sleeved on the outer periphery of the optical cable 7 .

[0099] At the same time, corresponding to the connection between the tail sleeve 6 and the second connection end 402, a connection component is preferably provided between the tail sleeve 6 and the second connection end 402, so as to achieve a detachable connection between the two.

[0100] In a specific preferred embodiment, the above-mentioned connecting component is a combination of a second connecting protrusion 408 arranged on the outer periphery of the second connecting end 402 and a connecting groove 601 opened at the end of the tail sleeve 6. By sleeve-fitting the tail sleeve 6 onto the second connecting end 402 so that the second connecting protrusion 408 can be just embedded in the connecting groove 601, the connection between the tail sleeve 6 and the second connecting end 402 can be completed.

[0101] In addition, to facilitate the bending adjustment of the tail sleeve 6, a plurality of circumferential grooves 602 are spaced apart on the outer circumference of the tail sleeve 6. In actual setting, in the circumferential direction of the same end face, a plurality of circumferential grooves 602 are spaced apart in the circumferential direction, and in the axial direction of the tail sleeve 6, the circumferential grooves 602 are staggered. Such a setting can meet the bending requirements of the tail sleeve 6 in different directions.

[0102] For the optical fiber connector in the preferred embodiment, the process of assembling and connecting it with the optical cable 7 is preferably as follows: Figure 11~Figure 17 As shown in , it mainly includes the following processes:

[0103] (1) Cut the optical cable 7 according to the required process requirements, and then perform a stripping operation on the end of the optical cable 7 to remove the outer sheath 703 at the end of the optical cable 7 to separate the optical fiber 701 and the reinforcing element 702;

[0104] The optical fiber 701 is passed through the crimping ring 502 and the crimping body 501 in sequence, and the reinforcing element 702 of the optical cable 7 is crimped onto the crimping body 501 through the crimping ring 502 to achieve the connection of the crimping assembly 5 at the end of the optical cable 7.

[0105] Thereafter, professional equipment is used to remove the coating layer on the outer periphery of the end of the stripped optical fiber 701. This can be quickly completed using mature technology in the prior art and will not be described in detail here.

[0106] Finally, the stripped optical fiber 701 passes through the spring 202 and into the ferrule hole at the end of the ferrule 201, completing the assembly of the ferrule assembly 2, the crimping assembly 5 and the end of the optical cable 7, forming a Fig.11 The initial state is shown.

[0107] (2) Pass the tail sleeve 6 through the ferrule assembly 2 and the crimping assembly 5 in sequence, and sleeve it on the outer periphery of the optical cable 7, as shown in FIG. Fig.12 , Fig.13 as shown in .

[0108] (3) Assembling the connector body 4;

[0109] First, the connector body 4 is placed on one radial side of the ferrule assembly 2 so that the tail end of the spring 202 passes over the head end of the first connection end 401;

[0110] Secondly, the optical fiber between the ferrule 201 and the crimping assembly 5 is bent so that the end of the spring 202 is aligned with the end opening of the first connecting end 401. At this time, the slightly bent optical fiber 701 is just embedded in the end of the first hole section 4041 of the longitudinal section 404, that is, the crimping assembly 5 is located on the side of the first connecting end 401 where the longitudinal section 404 is opened;

[0111] Thereafter, the ferrule assembly 2 is axially inserted into the first connection end 401, and the crimping body 501 of the crimping assembly 5 is radially aligned with the limiting hole 405, and the crimping body 501 is correspondingly embedded in the limiting hole 405; accordingly, the optical cable 7 after the tail end of the crimping assembly 5 is embedded in the second connection end 402 through the second hole section 4042, thereby completing the assembly between the ferrule assembly 2, the crimping assembly 5 and the connector body 4;

[0112] Finally, the tail sleeve 6 is axially slid so that its end is sleeved on the outer periphery of the second connecting end 402 and is detachably connected thereto, forming a Fig.15 The assembled state shown in .

[0113] (4) The inner frame sleeve 3 is connected to the first connecting end 401, such as Fig.16 As shown in;

[0114] (5) Determine the assembly status of the optical fiber 701 by observing the bending degree of the optical fiber 701 through the aligned end notch 304 and the first hole section 4041 to determine whether adjustment is required;

[0115] If the bend is too large, reverse the above process (1) to (4), pull the end of the optical fiber 701 out of the ferrule 201, cut it to the corresponding length, and repeat the above process (1) to (4) to complete the assembly of the ferrule assembly 2 and the optical fiber 701;

[0116] Thereafter, a glue injection device is used to inject glue into the tail of the ferrule 201 through the end notch 304 and the first hole section 4041 , and then a related curing operation is performed to fix the optical fiber 701 to the ferrule 201 .

[0117] (6) The outer shell 1 is sleeved onto the inner frame 3 and the outer periphery of the connector body 4 to complete the assembly connection of the optical fiber connector at the end of the optical cable 7.

[0118] After assembly is completed, in order to prevent damage to the ferrule 201 before the optical cable 7 is used, or dust falls into the connector opening, it is preferred to sleeve a dust cap 203 on the end of the ferrule 201, such as Figure 2 as shown in .

[0119] For the optical fiber connector in the preferred embodiment, the combination of the ferrule assembly 2, the inner frame sleeve 3, the connector body 4 and the crimping assembly 5 makes the optical fiber connector in the preferred embodiment have the ability to be detached. Even if the optical fiber connector is connected to the end of the optical cable in the factory, the end of the optical cable 7 can be disassembled at the construction site. Fig.11 Status shown.

[0120] It is the above-mentioned separable design that enables the optical cable 7 to meet the requirements of air blowing construction during the subsequent construction process.

[0121] Specifically, when the prefabricated optical cable 10 is actually laid, the aforementioned steps (1) to (6) can be reversed at the laying site to successively remove the outer shell 1, the inner frame sleeve 3, the connector body 4, and the tail sleeve 6 from the end of the optical cable 7, and restore the optical cable 7 to its original shape. Fig.11 Status shown.

[0122] At this time, the ferrule 201 of the ferrule assembly 2 is tightly connected to the end of the optical fiber 701, and the outer diameter of the entire end structure is close to the outer diameter of the optical cable 7, which can meet the air blowing requirements of the air blowing tube.

[0123] Accordingly, in order to better protect the front end of the optical cable 7 when the air-blowing optical cable 7 is in progress, more specifically to avoid the breakage of the optical fiber between the ferrule 201 and the crimping assembly 5, a traction sheath 8 is preferably provided accordingly, such as Fig.10 As shown in , its outer diameter is not larger than the inner diameter of the air blowing pipe, usually 3~8mm, which can meet the air blowing demand in the air blowing pipe.

[0124] In more detail, the traction sheath 8 in the preferred embodiment is a tubular structure, one end of which is provided with a stepped central blind hole 801 along the axial direction, and the other end is provided with a traction hole 803 for air blowing traction.

[0125] At the same time, a lateral through groove 802 penetrating the traction hole 803 is opened on one side of the traction sheath 8 for installing the ferrule assembly 2 and the crimping assembly 5 at the end of the optical cable 7 in the traction sheath 8 .

[0126] In actual setting, the central blind hole 801 is preferably in the form of a stepped hole, and a hole section is formed inside it for accommodating the ferrule 201, the spring 202, and the crimping assembly 5 to prevent the axial movement of the ferrule assembly 2 and the crimping assembly 5 relative to the traction sheath 8 after being embedded.

[0127] like Fig.18 As shown in , a step surface structure for axially limiting the end cap of the crimping body 501 is formed in the central blind hole 801, ensuring that the crimping body 501 can be axially positioned after being radially embedded in the central blind hole 801 through the lateral through groove 802.

[0128] More specifically, the traction sheath 8 in the preferred embodiment is made of a rubber material with a certain deformation ability, and the opening width of the lateral through groove 802 preferably corresponds to the outer diameter of the ferrule assembly 2 and the crimping assembly 5, and is further preferably slightly smaller than the outer diameters of the two components. In this way, after the ferrule assembly 2 and the crimping assembly 5 are radially embedded in the central blind hole 801, the separation of the two components and the traction sheath 8 can be effectively avoided.

[0129] More preferably, in actual setting, in order to ensure protection of the ferrule end of the ferrule 201, the dust cap 203 is preferably sleeved on the ferrule end of the ferrule 201 and then integrally embedded in the traction sheath 8, such as Fig.18 as shown in .

[0130] With the above settings, you can use Fig.18 The end structure shown in the figure is air-blown for laying. After the air-blowing is completed, the traction sheath 8 can be removed, and the tail sleeve 6, the connector body 4, the inner frame sleeve 3, and the outer shell 1 are connected according to the corresponding operation process in the aforementioned steps (2) to (6), so that the optical cable 7 can be connected and used after air-blowing.

[0131] The detachable fiber optic connector in the utility model has a simple structure and is easy to assemble and disassemble. The combined arrangement of the components can effectively simplify the assembly and disassembly process of the fiber optic connector, and realize the bending state check before the optical fiber and the ferrule are fixed, thereby avoiding excessive bending of the optical fiber due to too long optical fiber reservation, reducing additional attenuation, improving the reliability and accuracy of optical cable transmission and application, and providing conditions for the application of optical cables in conventional air-blowing laying scenarios. It has good practical value and application prospects.

[0132] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A separable optical fiber connector, comprising a housing, a ferrule assembly, an inner frame sleeve and a connector body which can be assembled and connected as one; characterized in that: Also included are crimping assemblies; The ferrule assembly comprises a ferrule and a spring; one end of the ferrule is a ferrule end with a ferrule end face, and the other end is a ferrule tail handle for plugging and fixing with the end of the optical fiber; the spring can be sleeved on the outer periphery of the ferrule tail handle and axially limited; A connecting through hole is axially provided in the middle of the connector body, and a longitudinal section hole is provided on the outer periphery of one side thereof, which axially penetrates both ends of the connector body and radially penetrates the connecting through hole; a step surface is formed at one end of the connecting through hole for limiting the position of the spring after being embedded; and a limiting hole is provided in the annular direction on the inner wall surface of the middle part of the connecting through hole, and a notch with an opening width not less than the inner diameter of the limiting hole is provided at a position of the longitudinal section hole directly opposite to the limiting hole; The inner frame sleeve is a hollow structure, one end of which can be detachably sleeved with the first end of the connector body, and after the sleeve connection is completed, the ferrule is axially limited to one end of the connector body; The crimping assembly includes a crimping body and a crimping ring; a through hole is opened on the crimping body for passing the optical fiber after the end of the optical cable is stripped; the crimping ring and the crimping body can be assembled and connected, and the crimping ring can crimp the reinforcing element of the stripped optical cable onto the crimping body after the optical fiber passes through the crimping body; the outer diameter of the crimping body corresponds to the inner diameter of the limiting hole, and the opening width of the longitudinal section hole between the limiting hole and the rear end of the connector body is not less than the maximum value of the outer diameter of the optical cable and the outer diameter of the crimping ring.

2. The separable optical fiber connector according to claim 1, characterized in that: An end notch penetrating through the inside and outside of the sleeve body is axially opened at one end of the inner frame sleeve, and the end notch can be aligned with the longitudinal section hole when the inner frame sleeve is sleeved on the connector body.

3. The separable optical fiber connector according to claim 1 or 2, characterized in that: A limiting end with an outer diameter larger than the insert end and the insert tail handle is formed in the middle of the insert, and an anti-rotation hole corresponding to the outer contour of the limiting end is formed in the middle of the inner frame sleeve, and the limiting end can only be embedded in the anti-rotation hole in a unique alignment state.

4. The separable optical fiber connector according to claim 3, characterized in that: The limit end is obtained by opening at least one anti-rotation cut surface on the outer circumference of the cylindrical structure. The anti-rotation cut surface extends from the end of the limit end close to the core end surface to the middle of the limit end, and forms a limit step in the middle of the limit end.

5. The separable optical fiber connector according to claim 1, 2 or 4, characterized in that: The crimping body comprises a column for the crimping ring to be sleeved and an end cap arranged at one end of the column and having an outer diameter greater than the outer diameter of the column; The outer diameter of the end cap corresponds to the outer diameter of the limiting hole, and can be radially embedded in the limiting hole.

6. The separable optical fiber connector according to claim 5, characterized in that: The opening width of the longitudinal section hole between the limiting hole and the first end of the connector body is not greater than the outer diameter of the spring.

7. The separable optical fiber connector according to claim 5, characterized in that: Also includes tail cover; The inner diameter of the tail sleeve is not less than the outer diameter of the optical cable, and is also not less than the maximum outer diameter of the crimping assembly; and one end of the tail sleeve can be detachably connected to the tail end of the connector body.

8. The separable optical fiber connector according to claim 7, characterized in that: The connector body is a multi-section structure, comprising a first connecting end and a second connecting end disposed at two ends, and a limiting portion disposed between the two connecting ends; The limiting hole is arranged in the limiting portion, and the outer diameter of the limiting portion is larger than the outer diameters of the two connecting ends, and annular step surfaces are respectively formed at positions connected to the two connecting ends.

9. The separable optical fiber connector according to claim 8, characterized in that: A connecting component is provided between the first connecting end and the inner frame sleeve; and / or a connecting component is provided between the second connecting end and the tail sleeve.

10. The separable optical fiber connector according to claim 9, characterized in that: The connecting assembly includes a connecting protrusion arranged on the outer periphery of the corresponding connecting end and a connecting buckle or a connecting groove arranged on the corresponding sleeve body.

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