Photoelectric composite MPO type connector

Abstract

The invention belongs to the technical field of photoelectric integration, and particularly relates to a photoelectric composite MPO type connector. A photoelectric composite MPO type connector comprises a shell which comprises a front shell assembly and a rear shell assembly detachably connected with the front shell assembly in a matched mode; the front shell assembly is provided with a front end matching surface and an internal cavity; the optical fiber insertion core assembly is arranged in the inner cavity of the connector shell, the optical fiber insertion core assembly comprises at least one multi-core optical fiber insertion core, and the multi-core optical fiber insertion core is provided with an optical butt joint end face; the spring assembly is arranged in the inner cavity of the connector shell; the electrical connection assembly is arranged in the inner cavity of the connector shell, and the electrical connection assembly comprises at least two electrical butt joint terminals; the front end of the at least one internal electric conductor is electrically connected with the at least one electric butting terminal; and at least one internal electrical wiring path is arranged in the front shell assembly and / or the rear shell assembly, and the internal electrical conductor extends along the internal electrical wiring path.

Description

Technical Field

[0001] The present invention belongs to the technical field of optoelectronic integration, and in particular relates to an optoelectronic composite MPO type connector. Background Art

[0002] With the rapid development of information technology, data centers, high-speed network communications, and emerging optoelectronic integrated systems are placing increasingly higher demands on interconnect technology. In the field of optical communications, MPO (Multi-fiber Push-On) connectors have become the mainstream choice for 40G, 100G, and even higher-speed network cabling, owing to their ability to accommodate multiple optical fibers in a compact interface, enabling high-density, high-bandwidth optical signal transmission. Traditional MPO connectors focus on the transmission of pure optical signals, with their design and optimization primarily focused on improving fiber alignment accuracy, reducing insertion loss and return loss, and enhancing plug-in reliability and installation density. Prior art improvements to MPO connectors have primarily focused on areas such as the ease of male-to-female conversion, managing internal spring force to protect the fiber during maintenance, and "push-on" designs for specialized installation scenarios such as narrow ducts. While these improvements have enhanced the performance or applicability of MPO fiber connectors in specific areas, their fundamental purpose remains to serve the transmission of pure optical signals.

[0003] However, many modern applications, such as powering remote active optical modules, hybrid optoelectronic signal transmission between boards or devices, and the growing integration of silicon photonics, often require both high-density optical signal transmission and reliable electrical power or signal transmission over the same interconnect interface. Traditionally, optical and electrical connectors have been deployed separately, or customized optoelectronic hybrid cables and connectors have been employed, which are bulky, complex, and costly. This separate or non-standardized approach not only consumes valuable equipment space, increases wiring complexity and system cost, but can also pose challenges to signal integrity and system integration. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a photoelectric composite MPO type connector.

[0005] Currently, standard MPO connectors and related improved technologies on the market generally lack mature solutions for effectively integrating multiple electrical connection pathways within the compact MPO form factor. The internal space is primarily designed for optical components such as optical fibers, ferrules, and springs. Safely and reliably introducing and routing electrical conductors and achieving stable electrical contact without significantly increasing the form factor or sacrificing optical transmission performance presents numerous technical challenges, such as internal space utilization, isolation and interference prevention between the optical path and the circuit, reliability and durability of the electrical connection, and manufacturability. Therefore, the technical problem to be solved by the present invention is precisely how, in the context of existing MPO connectors primarily used for pure optical transmission, to effectively integrate electrical connection components within the connector, including electrical mating terminals, internal electrical conductors, and internal electrical wiring pathways for accommodating these conductors, while maintaining or substantially maintaining the compact form factor and high-density optical connection capabilities of the MPO connector through innovative structural design. This allows for the combined transmission of optical and electrical signals over the same MPO connector interface, meeting the needs of modern optoelectronic hybrid applications, simplifying system wiring, and improving integration.

[0006] An optoelectronic composite MPO connector, comprising:

[0007] A housing, the housing comprising a front housing assembly and a rear housing assembly detachably connected thereto; the front housing assembly having a front mating surface and an internal cavity for accommodating internal components;

[0008] an optical fiber ferrule assembly disposed in the internal cavity of the connector housing, the optical fiber ferrule assembly comprising at least one multi-core optical fiber ferrule having an optically mating end face exposed to the front mating face of the front housing assembly;

[0009] a spring assembly disposed in the internal cavity of the connector housing, the spring assembly acting on the optical fiber ferrule assembly; and

[0010] An electrical connection assembly is disposed in the internal cavity of the connector housing, the electrical connection assembly comprising:

[0011] at least two electrical docking terminals, whose contact portions are located on the front mating surface of the front shell assembly and are used to establish electrical signal connections with external mating connectors;

[0012] And, at least one internal electrical conductor, a front end of which is electrically connected to at least one electrical docking terminal; at least one internal electrical wiring path is provided inside the front shell component and / or the rear shell component, and the internal electrical conductor extends along the internal electrical wiring path.

[0013] Furthermore, the internal electrical wiring path is a wire groove for accommodating and guiding the internal electrical conductor, which is integrally formed on the inner wall of the front shell component and / or the inner wall of the rear shell component through an injection molding process, and is used to guide and separate the internal electrical conductor in the process of extending from the front shell component to the rear shell component.

[0014] Furthermore, the rear shell assembly is provided with at least one integrated solder bath structure, and the rear end of the internal electrical conductor is electrically connected to the external conductor in a low-impedance manner within the solder bath structure.

[0015] Furthermore, the rear shell assembly includes at least two rear shell modules that can be spliced together, and a rear shell splicing piece for positioning and fixing is provided between the rear shell modules; the internal electrical conductors and optical fibers are accommodated in one or more of the rear shell modules and are connected to the front shell assembly.

[0016] Furthermore, the fiber optic ferrule assembly also includes at least two guide pins, which are exposed to the front end mating surface together with the multi-core fiber optic ferrule; one end of the spring assembly abuts against the fiber optic ferrule assembly, and the other end abuts against the rear shell assembly.

[0017] Furthermore, a base is provided between the optical fiber ferrule assembly and the spring assembly, and the base is fixedly connected to the multi-core optical fiber ferrule and fixed with the guide pin; the base is made of insulating material, and is used to form electrical isolation between the spring assembly and the electrical connection assembly, and to provide a support surface for the spring assembly.

[0018] Furthermore, a connector key is provided on the front mating surface of the front shell assembly for mating with the corresponding keyway of the mating connector; the electrical docking terminal is a flat copper contact piece, the arrangement of which is adapted to the size and interface standard of the front end of the MPO connector.

[0019] Furthermore, the tail of the connector housing is provided with an integral injection-molded tail sheath, which covers the lead-in end of the optoelectronic composite cable and is connected to the rear shell assembly.

[0020] Furthermore, a jacket for clamping the optoelectronic composite cable is provided between the tail jacket and the rear shell assembly.

[0021] Furthermore, the MPO type connector includes a dust cap having a key key adapted to the connector key key on the front shell assembly; the dust cap also includes a traction portion and a spring wing structure for fixing to the front end of the front shell assembly.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides an optoelectronic composite MPO connector. By innovatively integrating electrical connection components on the basis of a traditional MPO connector structure, the technical bottleneck of the existing MPO connector that can only transmit optical signals but cannot simultaneously transmit electrical power or electrical signals is solved. By arranging electrical docking terminals, internal electrical conductors, and internal electrical wiring paths that are spatially coordinated with the optical fiber transmission path inside the connector housing, the composite function of simultaneously transmitting high-density optical signals and multi-channel electrical signals / power is achieved on a single, compact MPO interface. The system design integration and flexibility are greatly improved, and the connector is particularly suitable for application scenarios with strict requirements on space and wiring, such as power supply of remote active optical modules and interconnection between optoelectronic hybrid signal boards. The integration of optical paths and circuits significantly simplifies the complexity of system wiring, reduces the number and types of required connectors, and thus reduces the overall system cost and potential failure points. The electrical connection capability is increased while maintaining or substantially maintaining the original compact form factor and high-density optical connection advantages of the MPO connector, thereby improving the space utilization of the equipment and achieving better compatibility with the existing MPO ecosystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of an MPO connector;

[0025] Figure 2 This is an exploded view of the MPO connector;

[0026] Figure 3 This is a schematic diagram of the internal components of the MPO connector;

[0027] Figure 4 This is a schematic diagram of the structure of the rear shell assembly of the MPO connector;

[0028] Figure 5 This is the main view of the MPO connector rear shell assembly;

[0029] Figure numerals: 1. MPO connector; 10. Shell; 101. Front shell assembly; 102. Rear shell assembly; 1021. Wire duct; 1022. Solder duct structure; 1023. Rear shell module; 1024. Rear shell splicing piece; 103. Front mating surface; 104. Internal cavity; 20. Fiber optic ferrule assembly; 201. Multi-core fiber optic ferrule; 202. Guide pin; 203. Connector Key; 30. Spring assembly; 40. Electrical connection assembly; 401. Electrical docking terminal; 50. Base; 60. Tail sheath; 70. Jacket; 80. Dust cap; 801. Key; 802. Pulling part; 90. Optoelectronic composite cable. DETAILED DESCRIPTION

[0030] The following is a further detailed description of an optoelectronic composite MPO connector according to the present invention in conjunction with an embodiment. For the sake of simplicity, this document cannot enumerate all the alternative technical features and implementation schemes contained in the present invention. Therefore, those skilled in the art should be aware that any technical features and implementation schemes in this embodiment do not limit the scope of protection of the present invention, which includes any alternative technical features and implementation schemes adopted by those skilled in the art without creative work. Specifically, the implementation schemes obtained by replacing any technical feature in the present invention or combining any two or more technical features provided by the present invention should all fall within the scope of protection of the present invention.

[0031] This embodiment provides a photoelectric composite MPO type connector 1, such as Figures 1 to 5 As shown, including:

[0032] The housing 10 includes a front housing assembly 101 and a rear housing assembly 102 detachably connected thereto; the front housing assembly 101 has a front mating surface 103 and an internal cavity 104 for accommodating internal components;

[0033] The optical fiber ferrule assembly 20 is disposed in the internal cavity 104 of the connector housing 10. The optical fiber ferrule assembly 20 includes at least one multi-core optical fiber ferrule 201. The multi-core optical fiber ferrule 201 has an optically mating end face exposed to the front mating face 103 of the front housing assembly 101. The optical fiber ferrule assembly 20 is used to establish optical signal transmission.

[0034] a spring assembly 30 disposed in the internal cavity 104 of the connector housing 10 , the spring assembly 30 acting on the fiber optic ferrule assembly 20 to provide a preload force that pushes the optical mating end face of the fiber optic ferrule assembly 20 toward the front mating face 103 ; and

[0035] The electrical connection assembly 40 is disposed in the internal cavity 104 of the connector housing 10 and includes:

[0036] At least two electrical docking terminals 401 , whose contact portions are located on the front mating surface 103 of the front housing assembly 101 , for establishing electrical signal connections with external mating connectors;

[0037] And, at least one internal electrical conductor, a front end of which is electrically connected to at least one electrical docking terminal 401; at least one internal electrical wiring path is provided inside the front shell component 101 and / or the rear shell component 102, and the internal electrical conductor extends along the internal electrical wiring path.

[0038] In a specific embodiment, the housing 10 of the optoelectronic composite MPO connector 1 is composed of a front housing assembly 101 and a rear housing assembly 102, both of which are made of high-strength, dimensionally stable engineering plastics through injection molding. The front housing assembly 101 and the rear housing assembly 102 are detachably connected through a precise snap-fit structure or a threaded structure on the mating surfaces of the two to form a closed connector housing 10. The front mating surface 103 of the front housing assembly 101 is designed to be a plane that complies with the MPO / MTP interface standard, and its internal cavity 104 is optimized to compactly accommodate the fiber optic ferrule assembly 20, the spring assembly 30, and some components of the electrical connection assembly 40. The core of the fiber optic ferrule assembly 20 is a multi-core MT-type ceramic or high-performance polymer material ferrule, and its front end has been precisely polished with an optical docking end face that is precisely positioned at the opening of the front mating surface 103 of the front housing assembly 101. The spring assembly 30 is a metal helical compression spring installed behind the fiber optic ferrule assembly 20. It continuously applies a preset forward pressure to the fiber optic ferrule assembly 20, ensuring good contact between the fiber end face and the mating connector. The electrical connection assembly 40 includes at least two pairs (e.g., four pairs) of flat, sheet-shaped electrical mating terminals 401, stamped from a highly conductive metal and surface-treated, located on the front mating surface 103 of the front shell assembly 101 and on both sides of the fiber ferrule. The internal electrical conductors connected to these mating terminals are multiple strands of fine-gauge wire. These wires extend to the rear of the connector along micro-grooves (internal electrical wiring pathways) pre-set on the inner walls of the front shell assembly 101 and the rear shell assembly 102, maintaining a safe insulation distance from the central optical fiber path.

[0039] In some embodiments, the internal electrical wiring path is a wire groove 1021 for accommodating and guiding the internal electrical conductor, which is integrally formed on the inner wall of the front shell component 101 and / or the inner wall of the rear shell component 102 through an injection molding process. It is used to guide and separate the internal electrical conductor in the process of extending from the front shell component 101 to the rear shell component 102 to maintain the distance from the optical fiber path.

[0040] Based on the above-described specific embodiments, the internal electrical wiring pathways, namely the wire ducts 1021, are integrally molded directly into the inner walls of the front and rear shell components 101, 102 through precision-machined cavity features in the injection molds. The cross-sectional shape of these wire ducts 1021 can be rectangular, semicircular, or other shapes suitable for accommodating wires, and their dimensions are sufficient to stably accommodate the selected internal electrical conductors. These wire ducts 1021 begin near the front electrical mating terminals 401, extend rearward, and smoothly transition to corresponding wire ducts 1021 on the inner wall of the rear shell component 102 at the interface between the front and rear shell components 101, 102. The wire ducts 1021 within the rear shell component 102 continue to guide the internal electrical conductors and may be designed with curved paths to accommodate the internal structure of the rear shell component 102, ultimately leading the internal electrical conductors to the electrical connection area at the rear of the connector. The inner surface of the wire ducts 1021 is smooth to reduce friction during threading.

[0041] In some embodiments, at least one integrated solder bath structure is provided on the rear shell assembly 102, and the rear end of the internal electrical conductor is electrically connected to the external conductor with low impedance in the solder bath structure through a low-temperature soft soldering process. The solder bath structure is used to avoid thermal damage to the adjacent optical fiber ferrule assembly 20 and the optical fiber.

[0042] On the basis of the above-mentioned specific embodiment, the tail of the rear shell assembly 102, corresponding to the end of each internal electrical wiring path (wire trough 1021), is integrally formed with one or more recessed, flat-bottomed solder trough structures. The size of each solder trough is designed to accommodate the rear end of the internal electrical conductor and the end of the external introduced conductor. After the insulation skin of the rear end of the internal electrical conductor is stripped, it is placed in the corresponding solder trough together with the stripped end of the corresponding external conductor in the introduced optoelectronic composite cable 90, and after dispensing a small amount of low-temperature solder paste, a local rapid heating method (such as laser welding or precision hot air welding) is used to complete the soft soldering connection to form a low-impedance electrical path. The plastic material around the solder trough has a certain heat shock resistance, and the welding process parameters (such as temperature and time) are precisely controlled to prevent excessive heat conduction to the optical fiber ferrule assembly 20, thereby protecting the optical fiber performance from being affected.

[0043] In some embodiments, the rear shell assembly 102 includes at least two rear shell modules 1023 that can be spliced together, and a rear shell splicing piece 1024 for positioning and fixing is provided between the rear shell modules 1023. The internal electrical conductors and optical fibers are accommodated in one or more of the rear shell modules and are connected to the front shell assembly 101.

[0044] On the basis of the above-mentioned specific embodiment, the rear shell assembly 102 includes two rear shell modules 1023. The mating edges of the two modules are provided with rear shell splicing pieces 1024 for positioning and fixing. For example, a mating mortise and tenon structure or snap feature is provided on the edge of one module. During assembly, the optical fiber ferrule assembly 20 with terminated optical fibers, the spring assembly 30, and the internal electrical conductor whose front end has been connected to the electrical docking terminal 401 are first preliminarily installed into the front shell assembly 101. Then, the internal electrical conductor and the optical fiber pigtail are respectively arranged in the corresponding wire groove 1021 and the optical fiber accommodating area of the lower rear shell module. Subsequently, the upper rear shell module and the lower rear shell module are spliced and fixed by the rear shell splicing piece 1024 to form a basically closed rear assembly, which is then connected to the front shell assembly 101 by snaps or screws.

[0045] In some embodiments, the fiber optic ferrule assembly 20 further includes at least two guide pins 202 , which are exposed together with the multi-core fiber optic ferrule 201 on the front mating surface 103 ; one end of the spring assembly 30 abuts against the fiber optic ferrule assembly 20 , and the other end abuts against the rear shell assembly 102 .

[0046] Based on the above-described specific embodiment, the fiber optic ferrule assembly 20 comprises an MT-type multi-fiber ferrule, with two precision metal guide pins 202 (when the connector is male) symmetrically mounted on its front face, or precision guide holes (when the connector is female) for accommodating the guide pins 202 of the mating connector. These guide pins 202 or guide holes, along with the array of multi-fiber fibers, are exposed to the front mating surface 103 of the front housing assembly 101. The spring assembly 30 is a metal helical compression spring, the front end of which rests against an annular step at the rear of the fiber optic ferrule assembly 20 or a base 50 connected thereto, while the rear end of the spring rests against a mating support surface formed within the rear housing assembly 102.

[0047] In some embodiments, a base 50 is further provided between the optical fiber ferrule assembly 20 and the spring assembly 30. The base 50 is fixedly connected to the multi-core optical fiber ferrule 201 and is fixed with the guide pin 202. The base 50 is made of insulating material and is used to form electrical isolation between the spring assembly 30 and the electrical connection assembly 40, and to provide a stable support surface for the spring assembly 30.

[0048] On the basis of the above-mentioned specific embodiment, a base 50 made of high-performance insulating polymer material is additionally provided between the optical fiber ferrule assembly 20 and the spring assembly 30. The front end of the base 50 is fixedly connected to the rear end of the multi-core optical fiber ferrule 201 by means of fitting or bonding. Two through holes or grooves corresponding to the positions of the guide pins 202 (or guide holes) are provided on the base 50, which are used to align with the guide pins 202 (or guide holes) during assembly and provide additional support or limitation. The structural design of the base 50 ensures that it provides reliable electrical insulation between the metal spring assembly 30 and the internal electrical conductors or other live parts of the electrical connection assembly 40 that may be adjacent, and provides a uniform and stable support surface for the front end of the spring assembly 30.

[0049] In some embodiments, a connector key 203 is provided on the front mating surface 103 of the front shell assembly 101, which is used to mate with the corresponding key slot of the mating connector; the electrical docking terminal 401 is a flat copper contact piece, and its arrangement is adapted to the size and interface standard of the front end of the MPO type connector 1.

[0050] Based on the above specific embodiment, a rectangular protrusion or groove that complies with the MPO / MTP standard is integrally injection-molded at a specific position (usually the top center) of the front mating surface 103 of the front shell assembly 101, serving as the connector key 203. The electrical docking terminal 401 is a thin metal sheet with good elasticity and conductivity, formed into a flat long strip through a precision stamping process, and its front contact portion is surface-treated (such as gold-plated) to improve conductivity and corrosion resistance. These contact pieces are arranged in parallel on both sides of the optical fiber ferrule, and their size, spacing, and position are compatible with the compact spatial layout of the front end of the MPO connector 1 and relevant interface standards to ensure reliable, low-impedance contact with the corresponding electrodes on the mating connector.

[0051] In some embodiments, the rear portion of the connector housing 10 is provided with an integrally injection-molded rear shield 60 . The rear shield 60 covers the lead-in end of the optoelectronic composite cable 90 and is connected to the rear housing assembly 102 .

[0052] Based on the aforementioned specific embodiment, the rear end of the connector housing 10 is integrally injection-molded with a tail shield 60 made of a flexible polymeric material (e.g., a thermoplastic elastomer). The front end of the tail shield 60 is tightly coupled to the rear end of the rear housing assembly 102 to which it is connected, through an interference fit, a snap-fit structure, or secondary injection molding. The tail shield 60 tapers rearward to form a flexible stress relief structure of a certain length, tightly enveloping the outer sheath of the introduced optoelectronic composite cable 90 to prevent damage to the cable due to excessive bending at the connector outlet and provide a certain degree of dust and water resistance.

[0053] In some embodiments, a clamping sleeve 70 for clamping the optoelectronic composite cable 90 is provided between the tail jacket 60 and the rear shell assembly 102 to provide mechanical fixation and stress relief.

[0054] Based on the above specific embodiment, a cylindrical or C-shaped jacket 70 made of metal (such as copper alloy or stainless steel) is pre-placed or inserted during assembly inside the tail jacket 60, near the area where it is connected to the rear shell assembly 102. After the outermost jacket is stripped off, the reinforcing elements (such as aramid fiber or other high-strength fibers) of the optoelectronic composite cable 90 are folded back and evenly distributed on the periphery of the inner jacket or shielding layer of the cable. Then, the cable together with the folded reinforcing elements are inserted into the jacket 70. Finally, a special crimping tool is used to radially crimp the jacket 70 position corresponding to the outside of the tail jacket 60, so that the jacket 70 and the tail jacket 60 material undergo plastic deformation, thereby firmly clamping the cable in the connector and providing sufficient mechanical fixing strength and pull-out resistance.

[0055] In some embodiments, the MPO-type connector 1 includes a dust cap 80, which has a key key 801 that is compatible with the connector key key 203 on the front shell assembly 101; the dust cap 80 also includes a traction portion 802 for easy plugging and unplugging, and a spring wing structure for fixing to the front end of the front shell assembly 101.

[0056] On the basis of the above-mentioned specific embodiment, the optoelectronic composite MPO connector 1 is equipped with a dust cap 80 which is injection-molded from a transparent or translucent polymer material. The insertion end of the dust cap 80 is provided with a concave keyway or protrusion as its key key 801 which precisely matches the connector key 203, ensuring that the dust cap 80 can only be inserted in the correct direction. One or more inwardly curved, elastic cantilever beams or protrusions are integrally formed on both side walls of the dust cap 80 as elastic wing structures. When the dust cap 80 is inserted into the front mating surface 103 of the front shell assembly 101, the elastic wings will be stuck in the corresponding shallow grooves on the side walls of the front shell assembly 101 or the dust cap 80 will be temporarily fixed by friction with the inner wall. The top or side of the dust cap 80 is provided with a flat extension portion or a structure with holes as a traction portion 802 for easy user gripping, to facilitate plugging and unplugging operations.

[0057] It is obvious to those skilled in the art that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here, and obvious variations or modifications derived therefrom are still within the scope of protection of the claims of the present invention.

Claims

1. A photoelectric composite MPO connector, characterized in that: include: A housing, comprising a front housing assembly and a rear housing assembly detachably connected thereto; The front housing assembly has a front mating surface and an internal cavity for accommodating internal components; an optical fiber ferrule assembly disposed in the internal cavity of the connector housing, the optical fiber ferrule assembly comprising at least one multi-core optical fiber ferrule having an optically mating end face exposed to the front mating face of the front housing assembly; a spring assembly, disposed in the internal cavity of the connector housing, the spring assembly acting on the optical fiber ferrule assembly; as well as An electrical connection assembly is disposed in the internal cavity of the connector housing, the electrical connection assembly comprising: at least two electrical docking terminals, whose contact portions are located on the front mating surface of the front shell assembly and are used to establish electrical signal connections with external mating connectors; And, at least one internal electrical conductor, a front end of which is electrically connected to at least one electrical docking terminal; at least one internal electrical wiring path is provided inside the front shell component and / or the rear shell component, and the internal electrical conductor extends along the internal electrical wiring path.

2. The optoelectronic composite MPO connector according to claim 1, characterized in that: The internal electrical wiring path is a wire groove for accommodating and guiding the internal electrical conductor, which is integrally formed on the inner wall of the front shell component and / or the inner wall of the rear shell component through an injection molding process, and is used to guide and separate the internal electrical conductor during its extension from the front shell component to the rear shell component.

3. The optoelectronic composite MPO connector according to claim 2, characterized in that: At least one integrated solder bath structure is provided on the rear shell assembly, and the rear end of the internal electrical conductor is electrically connected to the external conductor in a low-impedance manner within the solder bath structure.

4. The optoelectronic composite MPO connector according to claim 3, characterized in that: The rear shell assembly includes at least two rear shell modules that can be spliced together, and a rear shell splicing piece for positioning and fixing is provided between the rear shell modules; the internal electrical conductors and optical fibers are accommodated in one or more of the rear shell modules and are connected to the front shell assembly.

5. The optoelectronic composite MPO connector according to any one of claims 1 to 4, characterized in that: The optical fiber ferrule assembly further includes at least two guide pins, which are exposed together with the multi-core optical fiber ferrule on the front mating surface; one end of the spring assembly abuts against the optical fiber ferrule assembly, and the other end abuts against the rear shell assembly.

6. The optoelectronic composite MPO connector according to claim 5, characterized in that: A base is also provided between the optical fiber ferrule assembly and the spring assembly. The base is fixedly connected to the multi-core optical fiber ferrule and is fixed with the guide pin. The base is made of insulating material and is used to form electrical isolation between the spring assembly and the electrical connection assembly, and to provide a support surface for the spring assembly.

7. The optoelectronic composite MPO connector according to claim 5, characterized in that: A connector key is provided on the front mating surface of the front shell assembly for mating with the corresponding keyway of the mating connector; the electrical docking terminal is a flat copper contact piece, the arrangement of which is adapted to the size and interface standard of the front end of the MPO connector.

8. The optoelectronic composite MPO connector according to claim 5, characterized in that: The tail of the connector housing is provided with an integral injection-molded tail sheath, which covers the lead-in end of the optoelectronic composite cable and is connected to the rear shell assembly.

9. The optoelectronic composite MPO connector according to claim 8, characterized in that: A clamping sleeve for clamping the optoelectronic composite cable is provided between the tail sheath and the rear shell assembly.

10. The optoelectronic composite MPO connector according to claim 7, characterized in that: The MPO type connector includes a dust cap having a key key adapted to the connector key key on the front shell assembly; the dust cap also includes a traction portion and a spring wing structure for fixing to the front end of the front shell assembly.

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