CN119200102A - A vehicle-mounted optical fiber expansion connector - Google Patents

Abstract

The present invention relates to the field of optical fiber communication technology, and discloses an on-vehicle optical fiber expansion connector, comprising a male head and a female head connected to the male head, wherein the male head comprises a male head shell and a male head ferrule assembly snap-fitted into the inner cavity of the male head shell, and the female head comprises a female head shell and a female head ferrule assembly snap-fitted into the inner cavity of the female head shell, and the female head shell and the male head shell are snap-fitted into position and self-locked, and the female head ferrule in the female head ferrule assembly and the male head ferrule in the male head ferrule assembly are non-contact coupled; a sealing ring is sleeved on the female head shell, and the sealing ring is interference-fitted with the cavity wall of the male head shell. The present invention adopts high-precision optical fiber expansion and alignment technology to ensure superior optical performance, can realize non-contact optical path alignment connection, is resistant to vibration and shock, and is dustproof and waterproof, and can be applied to different environmental requirements.

Description

Vehicle-mounted optical fiber beam expansion connector

Technical Field

The invention relates to the technical field of optical fiber communication, in particular to a vehicle-mounted optical fiber expanded beam connector.

Background

With the rapid development of the automotive industry, the complexity of vehicle systems is increasing, and the demand for communication technologies that are high-speed, reliable and electromagnetic interference (EMI) insensitive is also water-logging. The data bandwidth of the traditional electric connector is lower, and the number of the electric connectors required is multiplied along with the development of the intelligent network connection of the automobile. Weight and cost control of automotive wiring harnesses are both challenges.

The traditional optical connector is of an optical fiber end face physical contact type structure, and is not suitable for severe environmental requirements of high vibration impact of a vehicle-mounted environment.

Disclosure of Invention

(One) solving the technical problems

Aiming at the defects of the prior art, the invention provides a vehicle-mounted optical fiber beam expansion connector, which solves the problem that the traditional optical connector is of an optical fiber end face physical contact structure and is not suitable for severe environmental requirements of high vibration impact of a vehicle-mounted environment.

(II) technical scheme

In order to achieve the above purpose, the invention is realized by the following technical scheme:

the vehicle-mounted optical fiber expanded beam connector comprises a male head and a female head connected with the male head in a plugging mode, wherein the male head comprises a male head shell and a male head insert core assembly, a buckle is arranged in an inner cavity of the male head shell, the female head comprises a female head shell and a female head insert core assembly, the buckle is arranged in the inner cavity of the female head shell, the female head shell and the male head shell are inserted in place in a buckling mode and then self-locked, a non-contact coupling mode is adopted between a female head insert core in the female head insert core assembly and a male head insert core in the male head insert core assembly, a sealing ring is sleeved on the female head shell, and interference fit is achieved between the sealing ring and a cavity wall of the male head shell.

Preferably, the inner cavity of the male housing is provided with a male buckle, after the male core insert component is inserted into the hole site of the inner cavity of the male housing, the step on the male core insert component is blocked and limited by the male buckle, and the inner cavity of the male housing is positioned below the male buckle and is slidably provided with a male plug pin.

Preferably, female buckle has been arranged to female shell's inner chamber, female lock pin subassembly inserts female shell's inner chamber's hole site back, and step on the female lock pin subassembly is blocked spacingly by female buckle, female shell inner chamber is located female buckle's below sliding arrangement has female bolt.

Preferably, after the female housing is butt-jointed and installed in place in the butt-joint groove arranged in the inner cavity of the male housing, the male pin and the female pin respectively abut against the male buckle and the female buckle.

Preferably, the male shell is symmetrically provided with buckling grooves, the female shell is provided with buckling protrusions matched with the buckling grooves in meaning, and the buckling protrusions are trapezoid and are close to the corners of the female plug pins and are provided with rounding angles.

Preferably, the male plug core assembly further comprises a male plug core fixing seat for fixing the male plug wire in an interference inserting mode, the female plug core assembly comprises a female plug core fixing seat for fixing the female plug wire in an interference inserting mode, and the inner cavities of the male plug core and the female plug core are fixedly inserted with bare fibers and optical fiber micro lenses.

Preferably, the male ferrule and the female ferrule are ceramic ferrules, the bare optical fiber and the optical fiber micro lens are welded and then penetrate into the ceramic ferrule and are fixed by special glue for the optical fiber, and then the end face of the ceramic ferrule is ground and coated with a film.

Preferably, the female plug core is sequentially sleeved with the stop ring and the closed ceramic sleeve, the outer parts of the stop ring and the closed ceramic sleeve are sleeved with the female metal sleeve, and the female metal sleeve is pressed into the female plug core fixing seat.

Preferably, the optical fiber micro-lens comprises two sections of common optical fibers and a self-focusing optical fiber, the common optical fibers and the self-focusing optical fiber are connected in a fusion mode, the common optical fibers and the self-focusing optical fiber which are fused are coaxial, and a light beam input by the bare optical fiber at one end of the optical fiber micro-lens is converted into parallel light rays after passing through the self-focusing optical fiber and is emitted.

(III) beneficial effects

The invention has the following beneficial effects:

The vehicle-mounted optical fiber beam expansion connector has the advantages that the optical fiber communication between the male head and the female head is realized in a physical contact mode, the insertion loss is low each time, the repeatability of insertion loss is good, the influence of the insertion and extraction times, the environmental vibration intensity or the frequency is avoided, the service life is long, meanwhile, the whole connector can realize the rapid replacement of different optical fibers, the repeatability is good, the interchangeability is strong, the sealing ring is filled between the male head shell and the female head shell through the arranged sealing ring, after the male head and the female head of the connector are inserted, the sealing ring is filled between the male head shell and the female head shell to achieve the sealing effect, the whole connector has higher sealing grade, is insensitive to dust and hardly influenced by the cleanliness of an installation environment, the male head and the female head of the whole connector are simple in structure, the expandability is strong, the expansion of the whole connector is over 12 cores, the production process of each component is simple, and the whole operation and maintenance cost is low.

Drawings

FIG. 1 is a schematic diagram of an application state structure of the present invention;

FIG. 2 is a schematic view of a cross-sectional structure in A-A direction of the present invention;

FIG. 3 is a schematic view of the split structure of the male housing and the female housing of the present invention;

FIG. 4 is a schematic view of the internal structure of the male and female sports shells of the present invention;

FIG. 5 is a schematic view of the structure of the invention in the B-B direction;

FIG. 6 is a schematic diagram of a butt joint structure of a male ferrule assembly and a female ferrule assembly according to the present invention;

FIG. 7 is a schematic view of a fiber microlens according to the present invention.

In the figure, 1, a male head shell, 11, a male head buckle, 12, a male head bolt, 13, a butt joint groove, 14, a buckle groove, 2, a male head insert core assembly, 21, a male head insert core fixing seat, 22, a male head insert core, 3, a female head shell, 31, a female head buckle, 32, a female head bolt, a sealing ring, 34, a buckle bulge, 41, a female head insert core fixing seat, 4, a female head insert core assembly, 42, a female head insert core, 43, a female head metal sleeve, 44, a closed ceramic sleeve, 45, a stop ring, 5, a cable sealing plug, 6, a bare optical fiber, 7, an optical fiber micro lens, 8 and a sheath crimping pipe.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, the invention provides a technical scheme that the vehicle-mounted optical fiber beam-expanding connector comprises a male head and a female head connected with the male head in a plugging manner, wherein the male head comprises a male head shell 1 and a male head insert core assembly 2 which is buckled in an inner cavity of the male head shell 1, the female head comprises a female head shell 3 and a female head insert core assembly 4 which is buckled in the inner cavity of the female head shell 3, the female head shell 3 and the male head shell 1 are buckled in place for self-locking after being oppositely inserted, a non-contact coupling is adopted between a female head insert core 42 in the female head insert core assembly 4 and a male head insert core 22 in the male head insert core assembly 2, a sealing ring 33 is sleeved on the female head shell, and the sealing ring 33 is in interference fit with a cavity wall of the male head shell 1.

The optical fiber connector has the advantages that the optical fiber communication between the male head and the female head is realized by adopting a physical contact mode, the insertion loss is low each time, the insertion loss repeatability is good, the influence of the insertion and extraction times, the environmental vibration intensity or the frequency is avoided, the service life is long, meanwhile, the whole connector can realize the rapid replacement of different optical fibers, the repeatability is good, the interchangeability is strong, the sealing ring 33 is filled between the male head shell 1 and the female head shell 3 through the arranged sealing ring 33, after the male head and the female head of the connector are oppositely inserted, the sealing ring 33 is filled between the male head shell 1 and the female head shell 3 to play a sealing effect, the whole connector has higher sealing grade, is insensitive to dust and hardly influenced by the clean degree of the installation environment, the structure of the male head and the female head of the whole connector is simple, the expandability is strong, the expansion of the parts exceeds 12 cores, the production process of each part is simple, and the whole operation and maintenance cost is low.

In this embodiment, a male buckle 11 is disposed in an inner cavity of the male housing 1, and after the male ferrule assembly 2 is inserted into a hole in the inner cavity of the male housing 1, a step on the male ferrule assembly 2 is blocked and limited by the male buckle 11, and a male plug pin 12 is slidably disposed under the male buckle 11 in the inner cavity of the male housing 1.

In this embodiment, a female buckle 31 is disposed in the inner cavity of the female housing 3, and after the female ferrule assembly 4 is inserted into the hole site in the inner cavity of the female housing 3, the step on the female ferrule assembly 4 is blocked and limited by the female buckle 31, and a female plug pin 32 is slidably disposed under the female buckle 31 in the inner cavity of the female housing.

Referring to fig. 3-5, in this embodiment, after the female housing 3 is butt-mounted in place in the butt-joint groove 13 disposed in the inner cavity of the male housing 1, the male pin 12 and the female pin 32 abut against the male buckle 11 and the female buckle 31, respectively. Through the public first buckle 11 and female first buckle 31 that set up, can be convenient for preliminary stability spacing fixed public first lock pin subassembly 2 and female first lock pin subassembly 4, simultaneously through public first bolt 12 and female first bolt 32 of arranging, can guarantee behind female head casing 3 and public first casing 1 butt joint buckle spacing, the bolt can further support public first buckle 11 and female first buckle 31 tightly, improve the buckle and to the spacing fixed stability of lock pin subassembly, because public first bolt 12 adopts slidable mounting's mode and does not have other relation between each other with female first bolt 32, only need cancel the buckle relation of connection between female head casing 3 and the public first casing 1 at this moment, can quick separation public head and female head, be convenient for realize the quick dismantlement of different female heads more smooth, good reproducibility is strong.

Referring to fig. 3 and 4, in this embodiment, the male housing 1 is symmetrically provided with the fastening slots 14, the female housing 3 is provided with the fastening protrusions 34 that are in meaning match with the fastening slots 14, and the fastening protrusions 34 are trapezoidal and are close to the corners of the female plug pins 32 and are provided with rounded corners. By arranging the buckling protrusions 34 and the buckling grooves 14, the female head housing 3 and the male head housing 1 can be conveniently and quickly connected and installed, and the female head of different optical fibers can be conveniently and quickly detached and replaced.

In this embodiment, the male plug core assembly 2 further includes a male plug core fixing seat 21 for interference-plugging and fixing the male plug wire, and the female plug core assembly includes a female plug core fixing seat 41 for interference-plugging and fixing the female plug wire, and the inner cavities of the male plug core 22 and the female plug core 42 are fixedly plugged with the bare optical fibers 6 and the optical fiber micro lenses 7.

In this embodiment, the male ferrule 22 and the female ferrule 42 are ceramic ferrules, and the bare optical fiber 6 and the optical fiber microlens 7 are welded and then inserted into the ceramic ferrules and fixed by a special adhesive for optical fiber, and then the end face of the ceramic ferrules is ground and coated.

Referring to fig. 6, in this embodiment, a stop ring 45 and a closed ceramic sleeve 44 are sequentially sleeved on a female ferrule 42, a female metal sleeve 43 is sleeved outside the stop ring 45 and the closed ceramic sleeve 44, and the female metal sleeve 43 is pressed into a female ferrule fixing seat 41. The inner and outer holes of the ceramic ferrule have extremely high roundness and coaxiality, and the accuracy can reach the micron level. The bare optical fiber 6 and the optical fiber micro lens 7 which are welded are inserted into the inner hole of the ceramic ferrule, and the coaxial of the optical fiber and the ceramic sleeve is ensured by the matching of the inner hole of the ceramic ferrule and the ultra-high precision minimum clearance between the optical fibers, so that the coaxial of an optical machine is realized. In practical application, the outside of optical cable is provided with the optical cable sheath, uses the structural adhesive to fix between sheath crimping pipe 8 and female head lock pin subassembly 4 and the public head lock pin 22, and the optical cable sheath is fixed by sheath crimping pipe 8 crimping. The cable sealing plug 5 is arranged at one end of the male shell 1 and one end of the female shell 3, the cable sealing plug 5 is made of rubber, and the threading hole is smaller than the diameter of the optical cable sheath, so that a good sealing effect can be achieved.

Referring to fig. 7, in this embodiment, the optical fiber micro lens 7 includes two sections of ordinary optical fiber and self-focusing optical fiber, the ordinary optical fiber and the self-focusing optical fiber are connected by fusion, the fused ordinary optical fiber and self-focusing optical fiber are coaxial, and the light beam input by the bare optical fiber 6 at one end of the optical fiber micro lens 7 is converted into parallel light after passing through the self-focusing optical fiber and is emitted. The optical fiber microlens 7 includes an ordinary optical fiber of an indefinite length and a self-focusing optical fiber of a specific length L. The two optical fibers are connected by fusion. The fusion-spliced ordinary fiber and the self-focusing fiber remain coaxial. The beam propagates in a sinusoidal path in a self-focusing fiber, the length of the transmission over one sine wave period being referred to as one pitch P. The relationship between the length L of the self-focusing fiber and the pitch P in the coaxial collimator is l=1/4×m×p (where M is a positive odd number), and for a self-focusing fiber of a specific length L, when a light beam is input from one end of the self-focusing lens fiber, the light beam is converted into parallel light after passing through the self-focusing fiber. When a pair of optical fiber micro lenses 7 are coupled, the axial coupling working distance is amplified, and the non-contact coupling of the optical fiber end faces can be realized. As shown in fig. 5 and 6, after the male head and the female head of the connector are inserted in place, a gap is formed between the end face of the male ferrule and the end face of the female ferrule, so that end face abrasion caused by repeated insertion and extraction of the connector and vibration impact is avoided.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more in the limited case. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A vehicle-mounted optical fiber expansion connector, comprising a male head and a female head plugged into the male head, characterized in that: the male head comprises a male shell and a male ferrule assembly snap-fitted into the inner cavity of the male shell, the female head comprises a female shell and a female ferrule assembly snap-fitted into the inner cavity of the female shell, the female shell and the male shell are snap-fitted into place and self-locked, and non-contact coupling is adopted between the female ferrule in the female ferrule assembly and the male ferrule in the male ferrule assembly; a sealing ring is sleeved on the female shell, and the sealing ring is interference fit with the cavity wall of the male shell. 2. A vehicle-mounted optical fiber expansion connector according to claim 1, characterized in that: the inner cavity of the male shell is arranged with a male buckle, after the male core assembly is inserted into the hole of the inner cavity of the male shell, the step on the male core assembly is blocked and limited by the male buckle, and the inner cavity of the male shell is slidably arranged with a male pin below the male buckle. 3. A vehicle-mounted optical fiber expansion connector according to claim 2, characterized in that: the inner cavity of the female shell is arranged with a female buckle, after the female core assembly is inserted into the hole of the inner cavity of the female shell, the step on the female core assembly is blocked and limited by the female buckle, and the inner cavity of the female shell is slidably arranged with a female pin below the female buckle. 4. A vehicle-mounted optical fiber expansion connector according to claim 3, characterized in that: after the female shell is docked and installed in the docking groove arranged in the inner cavity of the male shell, the male pin and the female pin are respectively pressed against the male buckle and the female buckle. 5. A vehicle-mounted optical fiber expansion connector according to claim 4, characterized in that: the male shell is symmetrically provided with snap grooves, the female shell is provided with snap protrusions matching the snap grooves, the snap protrusions are trapezoidal and have chamfered corners near the corners of the female pin. 6. A vehicle-mounted optical fiber expansion connector according to claim 1, characterized in that: the male ferrule assembly also includes a male ferrule fixing seat for interference fit and fixing the male plug wire, the female ferrule assembly includes a female ferrule fixing seat for interference fit and fixing the female plug wire, and the inner cavities of the male ferrule and the female ferrule are fixedly plugged with bare optical fibers and optical fiber microlenses. 7. An in-vehicle optical fiber expansion connector according to claim 6, characterized in that: the male ferrule and the female ferrule are both ceramic ferrules, the bare optical fiber and the optical fiber microlens are fused and then inserted into the ceramic ferrule and fixed with optical fiber special glue, and then the end face of the ceramic ferrule is polished and coated. 8. A vehicle-mounted optical fiber expansion connector according to claim 7, characterized in that: a stop ring and a closed ceramic sleeve are sequentially sleeved on the female ferrule, a female metal sleeve is sleeved on the outside of the stop ring and the closed ceramic sleeve, and the female metal sleeve is pressed into the female ferrule fixing seat. 9. A vehicle-mounted optical fiber beam expansion connector according to claim 8, characterized in that: the optical fiber microlens includes two sections of ordinary optical fiber and a self-focusing optical fiber, the ordinary optical fiber and the self-focusing optical fiber are connected by fusion splicing, the fused ordinary optical fiber and the self-focusing optical fiber remain coaxial, and the light beam input from the bare optical fiber at one end of the optical fiber microlens is converted into parallel light beams after passing through the self-focusing optical fiber and emitted.