A kind of anti-rotation optical fiber contact part for rear pick-up and rear delivery

Abstract

The present invention specifically discloses a rear-taken and rear-delivered anti-rotation optical fiber contact, comprising a ceramic ferrule, a ceramic sleeve and a tail handle, wherein the ceramic ferrule and the ceramic sleeve are coaxially arranged at the front end of the tail handle, and the ceramic ferrule is arranged inside the ceramic sleeve, a circular sleeve is sleeved on the outer side of the tail handle, a spring is arranged between the inner surface of the circular sleeve and the outer surface of the tail handle, and a claw spring is arranged on the outer surface of the circular sleeve. The rear-taken and rear-delivered anti-rotation optical fiber contact of the present invention can be integrated into a connector base, and can meet the requirements of simultaneous transmission of multiple high-precision optical fiber signals.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors for transmitting optical signals through high-density multi-core optical fiber connectors, and in particular relates to a rear-taken and rear-delivered anti-rotation optical fiber contact piece. Background Art

[0002] The fiber optic contact is the core part of the fiber optic connector. The reliability of the fiber optic contact directly affects the performance of the fiber optic connector and the optical path connection. At present, the tail end of the fiber optic contact core on the market is mostly fixed in a tail handle, the front end of the tail handle has a flange, and the rear end of the tail handle is provided with a spring support, and a buffer spring is provided between the flange and the spring support. When in use, the fiber optic contact is assembled in the insulator of the corresponding fiber optic connector, so that the spring support is fixedly matched with the insulator of the fiber optic connector, and the outer peripheral surface of the flange is matched with the insulator of the fiber optic connector in the axial direction of the pin. When plugging in with the matching contact, on the one hand, the axial length error of the fiber optic contact can be compensated by the compression of the buffer spring, and on the other hand, a certain pre-tightening force can be generated between the front end of the pin and the contact of the matching connector, thereby ensuring the reliability of the plug-in between the fiber optic connector and the matching connector. However, since there is no anti-rotation feature between the tail handle of the fiber optic contact and the insulator of the fiber optic connector, the fiber optic contact often rotates inside the insulator, which increases the wear of the fiber optic contact pins and makes it difficult to ensure the performance and reliability of the fiber optic connector; it is difficult to install the ferrule in the connector, and it is difficult to ensure that the performance indicators do not change before and after installation; when a problem or failure occurs in a certain channel of the fiber optic contact during use, the entire connector needs to be removed and disassembled for analysis or replaced, which seriously affects the working cycle and efficiency of the entire machine. Summary of the invention

[0003] In response to the above-mentioned technical problems, the present invention provides a rear-removal and rear-transport anti-rotation optical fiber contact with a small outer diameter, stable indicators, simple assembly, convenient disassembly, and easy maintenance. The contact can be integrated into a connector to realize an optical fiber connector with an anti-rotation function for simultaneously transmitting multiple high-precision optical fiber signals.

[0004] The technical solution adopted by the present invention is:

[0005] A rear-removal and rear-delivery anti-rotation optical fiber contact comprises a ceramic ferrule, a ceramic sleeve and a tail handle, wherein the ceramic ferrule and the ceramic sleeve are coaxially arranged at the front end of the tail handle, and the ceramic ferrule is arranged inside the ceramic sleeve, a circular sleeve is sleeved on the outer side of the tail handle, a spring is arranged between the inner surface of the circular sleeve and the outer surface of the tail handle, and a claw spring is arranged on the outer surface of the circular sleeve.

[0006] Preferably, a square nut is further provided on the outer surface of the tail handle, and the front end of the square nut is tightly attached to the tail of the circular sleeve.

[0007] Preferably, the square nut is provided with an internal thread, and the outer surface of the tail handle is provided with an external thread matching the internal thread.

[0008] Preferably, the outer surface of the claw spring is provided with a plurality of barbs at equal intervals along its circumferential direction.

[0009] Preferably, the front end of the ceramic ferrule is located inside the ceramic sleeve and the length from the front end of the ceramic sleeve is 1 / 2 of the total length of the ceramic ferrule.

[0010] A method for installing a rear-removal and rear-transportation anti-rotation optical fiber contact, the method comprising: crimping a ceramic ferrule and a ceramic sleeve in sequence at the front end of a tail handle, and assembling a circular sleeve, a claw spring and a square nut in sequence to complete the installation of the optical fiber contact, and then gently pushing the optical fiber contact from the rear end of the connector into the mounting plate of a connector base, the barbs on the outer circumference of the claw spring will automatically shrink during the pushing into the inner cavity of the mounting plate, and when the optical fiber contact is in place, the barbs on the outer circumference of the claw spring will automatically open and snap into the inner groove of the mounting plate, so that the optical fiber contact is transported rearward and fixed, and the radial fixation of the optical fiber contact in the mounting plate of the connector base is achieved through the difference in the outer dimensions of the square nut and the circular sleeve; the barbs on the outer circumference of the claw spring are retracted from the inner groove of the mounting plate, so that the optical fiber contact can be withdrawn from the rear end of the connector, so that the optical fiber contact can be removed rearward.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1) The rear-removable and rear-transportable anti-rotation optical fiber contact of the present invention adopts a claw spring structure, through which the optical fiber contact is axially fixed to the connector base, and can be disassembled by tooling, which is convenient and simple to operate without damaging the optical fiber contact, and is suitable for on-site repair and replacement.

[0013] 2) The rear-removal and rear-delivery anti-rotation optical fiber contact of the present invention is threadedly connected with a square nut on the tail handle, and the axial fixation of the optical fiber contact is achieved by the difference in the outer dimensions of the square nut and the circular sleeve, thereby ensuring the stability of the optical signal.

[0014] 3) The anti-rotation optical fiber contact for rear removal and rear delivery of the present invention has an open ceramic sleeve on the outside of the ceramic ferrule, which mainly plays a guiding and centering role when the ceramic ferrules are inserted. A spring is installed between the tail handle and the sleeve to ensure that the plug optical fiber contact and the socket optical fiber contact play a buffering role when they are inserted, avoiding the elastic collision of the two ceramic ferrule end faces to damage the end face finish and affect the insertion loss and return loss; and ensure that the two shells and optical fiber contacts of the plug connector and the socket connector are inserted in place during the insertion process, to prevent the connector shell from being inserted in place but the optical fiber contact is not in place, affecting the optical path transmission, or the optical fiber contact is inserted in place but the connector shell is not in place, causing the product to lose its locking ability and affecting the product's mechanical properties such as vibration and impact.

[0015] 4) The rear-removal and rear-delivery anti-rotation optical fiber contact of the present invention can be integrated into a connector base, thereby meeting the requirement of simultaneous transmission of multiple high-precision optical fiber signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a rear-removal and rear-delivery anti-rotation optical fiber contact provided by an embodiment of the present invention installed on a mounting plate of a connector base;

[0018] Figure 2 A schematic structural diagram of a post-take-and-post anti-rotation optical fiber contact provided by one embodiment of the present invention;

[0019] Figure 3 A cloud diagram of the deformation of a claw spring structure in a rear-take-and-relay anti-rotation optical fiber contact provided by one embodiment of the present invention;

[0020] Figure 4 A stress distribution cloud diagram of a claw spring structure in a back-taken and back-delivered anti-rotation optical fiber contact provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of a claw spring in a rear-take-and-relay anti-rotation optical fiber contact provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of a square nut structure in a rear-removal and rear-delivery anti-rotation optical fiber contact provided by an embodiment of the present invention;

[0023] Figure 7A cloud diagram of the deformation of a spring structure in a post-removal and post-delivery anti-rotation optical fiber contact provided by an embodiment of the present invention.

[0024] Among them, 1. Mounting plate; 2. Insulating sleeve; 3. Ceramic sleeve; 4. Ceramic insert; 5. Round sleeve; 6. Claw spring; 601-barb; 7. Spring; 8. Square nut; 9. Tail handle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, 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.

[0026] 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 invention claimed for protection, 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 this field without creative work are within the scope of protection of the present invention.

[0027] The present invention discloses a rear-taken and rear-delivered anti-rotation optical fiber contact member, such as Figure 2-7 As shown, it includes a ceramic ferrule 4, a ceramic sleeve 3 and a tail handle 9, wherein the ceramic ferrule 4 and the ceramic sleeve 3 are coaxially arranged at the front end of the tail handle 9, and the ceramic ferrule 4 is arranged inside the ceramic sleeve 3, the front end of the ceramic ferrule 4 is located inside the ceramic sleeve 3 and the length from the front end of the ceramic sleeve 3 is 1 / 2 of the total length of the ceramic ferrule 4, and the purpose of sleeve-arranging the ceramic sleeve 3 on the outside of the ceramic ferrule 4 is mainly to play a guiding and centering role when the ceramic ferrule 4 is inserted. A circular sleeve 5 is sleeved on the outer side of the tail handle 9, and a spring 7 is arranged between the inner surface of the circular sleeve 5 and the outer surface of the tail handle 9, which ensures that the plug optical fiber contact and the socket optical fiber contact play a buffering role when plugging together, avoiding elastic collision of the end faces of the two ceramic ferrules 4 to damage the end face finish and affect the insertion loss and return loss; and ensures that the two shells and optical fiber contacts of the plug connector and the socket connector are inserted into place during the plugging process, preventing the connector shell from being inserted into place but the optical fiber contact is not in place, affecting the optical path transmission, or the optical fiber contact is inserted into place but the connector shell is not in place, causing the product to lose the locking ability and affecting the mechanical properties of the product such as vibration and impact.

[0028] In the present invention, a claw spring 6 is provided on the outer surface of the circular sleeve 5, and a square nut 8 is also threadedly connected to the outer surface of the tail handle 9, the front end of the square nut 8 is tightly attached to the tail of the circular sleeve 5, and the claw spring 6 and the square nut 8 realize the axial fixation of the optical fiber contact on the connector base.

[0029] like Figure 1 As shown, the present invention uses a claw spring 6 to fix the optical fiber contact and the mounting plate of the connector base. The claw spring is designed as an external claw structure and is installed on the outer diameter of the circular sleeve 5 of the optical fiber contact. When assembling, the optical fiber contact is gently pushed into the mounting plate 1 from the tail of the connector. The mounting plate 1 is a hollow structure. An insulating sleeve 2 is arranged on the inner surface of the mounting plate 1. The tail of the insulating sleeve 2 abuts against the tail handle 9 and the front end of the circular sleeve 5 to avoid backlogging of the ceramic sleeve 3. The barbs 601 on the outer circumference of the claw spring 6 will automatically shrink when being pushed into the hole of the connector base. When the optical fiber contact is in place, the barbs 601 on the outer circumference of the claw spring 6 will automatically open and snap into the inner groove of the mounting plate 1, realizing the rear delivery function of the optical fiber contact and achieving the fixation of the optical fiber contact; the barbs on the outer circumference of the claw spring 6 can be retracted from the inner groove of the connector base by using a tool, and the optical fiber contact will be withdrawn from the tail of the connector, realizing the function of taking the optical fiber contact back. Since it is convenient to install and disassemble, the operation is simple, and the optical fiber contact is not damaged, it is suitable for on-site installation and maintenance.

[0030] Among them, the claw spring was subjected to relevant mechanical calculations, and ANSYS was used for mechanical simulation to ensure the normal disassembly and assembly of the optical fiber contact. The force on the claw spring was set, and the claw spring structure was subjected to force analysis using ANSYS software. The deformation cloud diagram of the claw spring structure is shown in the figure below: Figure 3 As shown in the figure, it can be seen that the maximum deformation of the claw spring is 0.022378mm, which will not damage the mechanical structure of the claw spring, indicating that the structural strength of the claw spring meets the design requirements. Figure 4 As shown in the figure, it can be seen that the maximum stress of the claw spring structure is 517.63MPa, and the relevant mechanical properties of the material selected for the claw spring meet the requirements.

[0031] The spring in the present invention is subjected to relevant mechanical calculations and mechanical simulation using ANSYS to ensure that the spring can play a buffering role when the plug optical fiber contact and the socket optical fiber contact are inserted into each other, thereby preventing the elastic collision of the two ceramic ferrule end faces from damaging the end face finish and affecting the insertion loss and return loss.

[0032] The pressure received by the spring during the installation of the overall structure of the contact is set, and the force analysis of the spring structure is performed using ANSYS software. The deformation cloud diagram of the spring structure is as follows Figure 7 As shown in the figure, it can be seen that the maximum deformation of the spring structure is 7.5202mm, and the spring can be compressed normally, indicating that the mechanical structure of the spring meets the design requirements.

[0033] For example Figure 6As shown, the contact of the present invention is provided with a structure to prevent the optical fiber contact from rotating. In order to ensure the stability of the optical signal, the optical cable core wire cannot be twisted or stressed in the working state, and a square nut 8 is installed on the tail handle 9 of the optical fiber contact, and the anti-rotation function of the optical fiber contact is realized through threaded connection.

[0034] Among them, the square nut must ensure that there is a clearance fit with the mounting plate of the connector base, and at the same time, the clearance must be appropriate to ensure that the square nut can not only prevent the optical fiber contact from rotating, but also ensure that when the spring is compressed, there is no interference between the square nut and the mounting plate of the connector base, and the spring's rebound force cannot be affected. Through relevant calculations, the square nut must ensure that the clearance between the mounting plate of the connector base is between 0.05-0.10mm.

[0035] The present invention also discloses a method for installing a rear-removal and rear-transportation anti-rotation optical fiber contact, the method comprising: crimping a ceramic ferrule and a ceramic sleeve in sequence at the front end of the tail handle, and assembling a circular sleeve, a claw spring and a square nut in sequence to complete the installation of the optical fiber contact, and then gently pushing the optical fiber contact from the rear end of the connector into the mounting plate of the connector base, the barbs on the outer circumference of the claw spring will automatically shrink during the pushing into the inner cavity of the mounting plate, and when the optical fiber contact is in place, the barbs on the outer circumference of the claw spring will automatically open and snap into the inner groove of the mounting plate, so that the optical fiber contact is transported backward and fixed, and the radial fixation of the optical fiber contact in the mounting plate is achieved through the difference in the outer dimensions of the square nut and the circular sleeve; the barbs on the outer circumference of the claw spring are retracted from the inner groove of the mounting plate, so that the optical fiber contact can be withdrawn from the rear end of the connector, so that the optical fiber contact can be removed backward.

[0036] The rear-removal and rear-delivery anti-rotation optical fiber contact of the present invention adopts a claw spring fixing structure, which is simple to assemble and convenient to disassemble and maintain. Multiple optical fiber contacts can be centrally installed in a connector base, and the demand for simultaneous transmission of multiple high-precision optical fiber signals can be met.

[0037] The optical fiber contact of the present invention adopts a claw spring and a square nut to fix the optical fiber contact in the connector base; the anti-rotation function of the optical fiber contact is realized by installing a square nut on the tail handle; the outer claw-shaped claw spring can realize the function of rear-take-and-return of the optical fiber contact; the optical fiber connector structure with the rear-take-and-return anti-rotation function can be integrated into the connector, meeting the current market demand for simultaneous transmission of multiple high-precision optical fiber signals.

[0038] The optical fiber contact of the present invention not only solves the problem of rotation of the optical fiber contact in the optical fiber connector, but also solves the problem of assembly of the optical fiber contact in the optical fiber connector. The rear-removal and rear-transmission anti-rotation optical fiber contact of the present invention can be integrated with an optical fiber connector that transmits multiple optical fiber signals simultaneously.

[0039] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A post-take-and-post anti-rotation optical fiber contact, characterized in that: It comprises a ceramic ferrule, a ceramic sleeve and a tail handle, wherein the ceramic ferrule and the ceramic sleeve are coaxially arranged at the front end of the tail handle, and the ceramic ferrule is arranged inside the ceramic sleeve, a circular sleeve is sleeved on the outer side of the tail handle, a spring is arranged between the inner surface of the circular sleeve and the outer surface of the tail handle, and a claw spring is arranged on the outer surface of the circular sleeve; The outer surface of the tail handle is also provided with a square nut, and the front end of the square nut is closely attached to the tail of the circular sleeve; The square nut is provided with an internal thread inside, and the outer surface of the tail handle is provided with an external thread matching the internal thread; The outer surface of the claw spring is provided with a plurality of barbs at equal intervals along its circumferential direction, and the plurality of barbs are opened toward the rear end of the connector; The front end of the ceramic ferrule is located inside the ceramic sleeve and the distance from the front end of the ceramic sleeve is 1 / 2 of the total length of the ceramic ferrule; An insulating sleeve is arranged on the inner surface of the mounting plate, and the tail of the insulating sleeve abuts against the tail handle and the front end of the circular sleeve; The square nut must ensure that the gap between it and the mounting plate of the connector base is between 0.05 and 0.10 mm; The installation method of the anti-rotation optical fiber contact is as follows: The ceramic ferrule and ceramic sleeve are crimped in sequence at the front end of the tail handle, and the circular sleeve, claw spring and square nut are assembled in sequence to complete the installation of the fiber optic contact. The fiber optic contact is then gently pushed from the tail of the connector into the mounting plate of the connector base. The barbs on the outer circumference of the claw spring will automatically shrink during the pushing into the inner cavity of the mounting plate. When the fiber optic contact is in place, the barbs on the outer circumference of the claw spring will automatically open and snap into the inner groove of the mounting plate, realizing the rear delivery of the fiber optic contact and the fixation of the fiber optic contact. The radial fixation of the fiber optic contact in the mounting plate is achieved through the difference in the outer dimensions of the square nut and the circular sleeve; the barbs on the outer circumference of the claw spring are retracted from the inner groove of the mounting plate, so that the fiber optic contact can be withdrawn from the tail of the connector, realizing the rear removal of the fiber optic contact.

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