CN-122018091-A - Anti-electromagnetic interference shielding type optical fiber connector structure and manufacturing method

Abstract

The invention discloses an anti-electromagnetic interference shielding type optical fiber connector structure and a manufacturing method, which belong to the technical field of optical fiber connectors, wherein the optical fiber connector structure comprises a shielding conductive shell, two ends of the shielding conductive shell are respectively connected with a first connecting piece and a locking component, one end of the first connecting piece, which is far away from the shielding conductive shell, is fixedly provided with an annular conductive contact piece, the inner part of the shielding conductive shell is coaxially provided with a bearing inner core seat, the bearing inner core seat is connected with the shielding conductive shell through a compensation component, the bearing inner core seat is composed of a structure with big cylinders at two ends and a small cylinder in the middle, and the inner part of the bearing inner core seat is coaxially provided with an optical fiber core inserting component. According to the structure and the manufacturing method, the electromagnetic absorption layer is arranged between the outer wall of the bearing inner core seat and the shielding conductive shell, and the ferrite or carbon nano tube composite wave-absorbing material is used for absorbing and attenuating the high-frequency electromagnetic waves entering the shell, so that electromagnetic reflection and secondary interference are reduced, and the overall anti-interference performance is improved.

Inventors

• He pi

Assignees

• 深圳市光凡通讯技术有限公司

Dates

Publication Date

20260512

Application Date

20260402

Claims (10)

1. 1. The shielding type optical fiber connector structure is characterized by comprising a shielding conductive shell, wherein two ends of the shielding conductive shell are respectively connected with a first connecting piece and a locking assembly, one end, far away from the shielding conductive shell, of the first connecting piece is fixedly provided with an annular conductive contact piece, the inside of the shielding conductive shell is coaxially provided with a bearing inner core seat, the bearing inner core seat is connected with the shielding conductive shell through a compensation assembly, the bearing inner core seat is composed of structures of a big cylinder at two ends and a small cylinder in the middle, and an optical fiber inserting core assembly is coaxially arranged inside the bearing inner core seat.
2. 2. The structure of claim 1, wherein the small cylinder is provided with an annular groove.
3. 3. The electromagnetic interference resistant shielding type optical fiber connector structure according to claim 1, wherein the optical fiber ferrule assembly comprises a ferrule body, a ferrule fixing sleeve and elastic limiting pieces, the ferrule body is arranged in an axle center area of the bearing inner core seat, one end of the ferrule body extends out of the end face of the first connecting piece to form a butt joint end, the ferrule fixing sleeve is sleeved at the other end of the ferrule body, the elastic limiting pieces are arranged in a plurality, and the elastic limiting pieces are fixedly arranged between the ferrule fixing sleeve and the bearing inner core seat at equal intervals.
4. 4. A shielded optical fiber connector structure according to claim 3, wherein: the ferrule body is a cylindrical ceramic ferrule.
5. 5. The structure of claim 2, wherein the compensation assembly comprises an annular conductive floating member and elastic conductive contact pieces, the annular conductive floating member is sleeved in the annular groove, the axial length of the annular groove is greater than that of the annular conductive floating member, and the elastic conductive contact pieces are equidistantly arranged on the periphery of the annular conductive floating member.
6. 6. The structure of claim 5, wherein the elastic conductive contact is in an arc-shaped spring structure.
7. 7. The structure of claim 6, wherein the annular conductive floating member is provided with a plurality of grooves corresponding to the elastic conductive contacts, the size of the grooves is larger than that of the end faces of the elastic conductive contacts, one end of each elastic conductive contact is fixedly connected with the inner wall of the shielding conductive shell, and the other end of each elastic conductive contact is propped against the grooves.
8. 8. The structure of claim 1, wherein an electromagnetic absorption layer is fixedly disposed between the outer side wall of the inner core carrier and the inner wall of the shielding conductive housing and is disposed on one axial side of the compensation assembly.
9. 9. The structure of claim 1, wherein the locking assembly comprises a voltage-conducting sleeve, a pressing sleeve and a locking screw sleeve, one end of the voltage-conducting sleeve is arranged on the periphery of the rear end of the shielding conductive shell, the pressing sleeve is arranged on the other end of the voltage-conducting sleeve, the pressing sleeve is conical, anti-slip teeth are arranged on the inner wall of the pressing sleeve, and the inner wall of the locking screw sleeve is provided with internal threads which are matched with external threads arranged on the outer side of the pressing sleeve.
10. 10. A method of manufacturing an electromagnetic interference resistant shielded optical fiber connector structure according to any one of claims 1-9, comprising the steps of: s1, preparing a shielding conductive shell with a hollow cylinder structure by numerical control turning or precise machining, and reserving an installation space for installing a compensation component and an electromagnetic absorption layer on the inner wall of the shell; s2, preparing a bearing inner core seat by a precise injection molding or ceramic sintering processing mode, and processing an annular groove structure on the outer surface of the bearing inner core seat; S3, installing the annular conductive floating piece into the annular groove for bearing the inner core seat, and fixedly installing a plurality of elastic conductive contact pieces on the inner wall of the shielding conductive shell so that the end parts of the elastic conductive contact pieces and the annular conductive floating piece form a sliding conductive contact structure; s4, installing an annular electromagnetic absorption layer between the outer side wall of the bearing inner core seat and the inner wall of the shielding conductive shell, and fixing the annular electromagnetic absorption layer on one axial side of the compensation component; s5, installing the optical fiber core insert assembly into a central hole of a bearing inner core seat, and positioning and axially elastically compensating the core insert body through a core insert fixing sleeve and an elastic limiting piece; s6, sequentially installing a voltage guide sleeve, a compression sleeve and a locking screw sleeve at the rear end of the shielding conductive shell to form a locking structure for compressing the shielding layer of the optical cable; And S7, penetrating and connecting the optical fiber into the fixed hole site in the ferrule body from the tail part of the connector, and then screwing the locking screw sleeve to enable the compression sleeve to compress the optical cable braided shielding layer, thereby completing the integral assembly of the optical fiber connector.

Description

Anti-electromagnetic interference shielding type optical fiber connector structure and manufacturing method Technical Field The invention relates to the technical field of optical fiber connectors, in particular to an electromagnetic interference resistant shielding type optical fiber connector structure and a manufacturing method thereof. Background The optical fiber connector is an important device for realizing the rapid connection and separation of optical fibers in an optical communication system, and is widely applied to the fields of communication networks, data centers, industrial control, power systems and the like. The main function of the optical fiber connector is to realize low-loss optical signal transmission between two optical fibers and ensure the stability and reliability of a connecting structure. In the environments of power systems, rail transit, industrial automation equipment and high-power electronic equipment, a strong electromagnetic interference environment exists generally, and high-frequency electromagnetic waves and electromagnetic pulses easily enter the connector through equipment gaps or cable shielding discontinuities to influence the fiber communication module. Although the optical signal itself is not affected by electromagnetic interference, the optical fiber connector generally includes a metal structural member, a photoelectric conversion device, a sensor element, etc. inside the optical fiber connector, when electromagnetic interference enters through a connector housing or a cable shielding layer, parasitic current or electromagnetic coupling is easily formed in the connection structure, thereby affecting stable operation of the device. The existing optical fiber connector generally realizes basic electromagnetic shielding through a metal shell, but in practical application, the problem still exists that an assembly gap or tolerance exists between an internal component of the connector and the metal shell, when the connector is used in a plugging or vibrating environment, micro-motion is easy to generate, shielding contact is unstable, and an electromagnetic leakage path is formed. Disclosure of Invention The present invention provides an electromagnetic interference resistant shielding type optical fiber connector structure and a manufacturing method thereof, which solve the problems mentioned in the background art. In order to achieve the above-mentioned purpose, the invention provides an anti-electromagnetic interference shielding type optical fiber connector structure, which comprises a shielding conductive shell, wherein two ends of the shielding conductive shell are respectively connected with a first connecting piece and a locking assembly, one end of the first connecting piece, which is far away from the shielding conductive shell, is fixedly provided with an annular conductive contact piece, the inside of the shielding conductive shell is coaxially provided with a bearing inner core seat, the bearing inner core seat is connected with the shielding conductive shell through a compensation assembly, the bearing inner core seat is composed of a structure with a big cylinder at two ends and a small cylinder in the middle, and the inside of the bearing inner core seat is coaxially provided with an optical fiber ferrule assembly. Preferably, the small cylinder is provided with an annular groove. Preferably, the optical fiber core insert assembly comprises a core insert body, a core insert fixing sleeve and an elastic limiting piece, wherein the core insert body is arranged in an axle center area of a bearing inner core seat, one end of the core insert body extends out of the end face of the first connecting piece to form a butt joint end, the core insert fixing sleeve is sleeved at the other end of the core insert body, the elastic limiting pieces are arranged in a plurality, and the elastic limiting pieces are fixedly arranged between the core insert fixing sleeve and the bearing inner core seat at equal intervals. Preferably, the ferrule body is a cylindrical ceramic ferrule. Preferably, the compensation component comprises an annular conductive floating piece and elastic conductive contact pieces, the annular conductive floating piece is sleeved in the annular groove, the axial length of the annular groove is larger than that of the annular conductive floating piece, and the elastic conductive contact pieces are equidistantly arranged on the periphery of the annular conductive floating piece. Preferably, the elastic conductive contact is arranged in an arc-shaped spring plate structure. Preferably, the annular conductive floating piece is provided with a plurality of grooves corresponding to the elastic conductive contact pieces, the size of the grooves is larger than that of the end faces of the elastic conductive contact pieces, one ends of the elastic conductive contact pieces are fixedly connected with the inner wall of the shielding conductive shell, and th