High-integration-level in-line circular active connector optical cable assembly

Abstract

The invention belongs to the technical field of optical communication, and particularly relates to a high-integration-level direct insertion type circular active connector optical cable assembly which comprises a modified connector, a shell connected with the assembling end of the modified connector, a printed board assembly fixedly arranged in the shell and an optical cable assembly. The printed board assembly comprises a rigid printed board I which is in welding fit with a pin contact element in the modified connector, and two end parts of the rigid printed board I are connected with flexible printed boards. According to the high-integration-level in-line circular active connector optical cable assembly in the technical scheme, the photoelectric / electro-optical conversion chips mounted on the rigid printed board II are all vertical emitting light and vertical receiving light, and the photoelectric / electro-optical conversion chips are coupled by adopting the lenses, so that on one hand, the lenses play a role in protecting the photoelectric / electro-optical conversion chips and the gold wires, and on the other hand, the optical cable assembly is not damaged; on the other hand, the optical path can be rotated by 90 degrees to be parallel to the second rigid printed board, it is guaranteed that the optical cable center line and the active electric connector optical cable assembly are located on the same center line, and coaxial fiber output is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical communication, and in particular relates to a highly integrated direct-insertion circular active connector optical cable assembly. Background Art

[0002] Active electrical connector cable assembly usually refers to a connector assembly that integrates a photoelectric / electro-optical conversion module in a traditional electrical connector and transmits signals through an optical cable. It has the connection reliability of an electrical connector, does not have the problem of the end face being easily contaminated during the plug-in and unplug process, and retains a series of advantages of optical fiber transmission such as high bandwidth, low loss, light weight, and anti-electromagnetic interference. At the same time, there is no need to design a photoelectric / electro-optical conversion circuit inside the connecting device. Therefore, it is widely used in aerospace, missile-borne, airborne, ship-borne, ground vehicle-borne, missile-borne and other communication equipment.

[0003] The J599 III series connector is a mature circular electrical connector product, with the main features of three-thread quick locking and separation, five-key slot structure to achieve blind insertion and prevent wrong insertion, and waterproof and vapor-proof connection function. Integrating optoelectronic / electro-optical conversion modules in this series of connector products has the following design difficulties:

[0004] 1. Since the pin contacts in the J599 III series connector are used to transmit electrical signals, it is necessary to electrically interconnect the high-density distributed pin contacts with the optoelectronic / electro-optical conversion module;

[0005] 2. Military products require active electrical connector cable assemblies to have dual backup functions;

[0006] 3. Considering the large space required for optical cable turns and the generally strict requirements on the installation space of connector products for military communication equipment, the overall size of the active electrical connector cable assembly should be as short as possible after the J599 III series connector integrates the optoelectronic / electro-optical conversion module, considering the versatility of the active electrical connector cable assembly. Summary of the invention

[0007] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0008] A highly integrated plug-in circular active connector optical cable assembly, comprising a modified connector, a housing connected to an assembly end of the modified connector, a printed circuit board assembly fixedly arranged inside the housing, and an optical cable assembly, wherein the printed circuit board assembly comprises a rigid printed circuit board 1 welded to a pin contact in the modified connector, both ends of the rigid printed circuit board 1 are connected to flexible printed circuits, the middle portion of the flexible printed circuit board is bent outwards, and the ends are connected to a rigid printed circuit board 2, a molybdenum copper block is embedded on the rigid printed circuit board 2, the ends of the molybdenum copper block are arranged oppositely and are flush with the surface of the rigid printed circuit board 2 and are affixed with a photoelectric / electro-optical conversion chip, a photoelectric / electro-optical conversion circuit is arranged on the rigid printed circuit board 2, the photoelectric / electro-optical conversion chip and the rigid printed circuit board 2 are electrically interconnected by gold wire bonding, a lens covering the photoelectric / electro-optical conversion chip is arranged on the rigid printed circuit board 2, and an optical interface is arranged on the lens;

[0009] The optical cable assembly includes a tail seat, from which multiple groups of optical cables are led out. The ends of each group of optical cables are equipped with MT connectors, which are plugged into corresponding optical interfaces on the lens. The tail end of the tail seat passes through the housing and extends to the outside of the housing.

[0010] As a preferred embodiment of the above technical solution, the rigid printed circuit board 1 is provided with welding holes whose number matches the pin contacts, and the pin contacts in the modified connector pass through the welding holes and are welded to the rigid printed circuit board 1.

[0011] As a preferred embodiment of the above technical solution, the opposite ends of the molybdenum-copper blocks protrude from the surface of the second rigid printed circuit board and are overlapped with the outer shell through a thermal pad.

[0012] As a preferred embodiment of the above technical solution, the shell includes an upper shell and a lower shell that are relatively distributed, and the upper shell and the lower shell are assembled by screws to form a complete shell.

[0013] As a preferred embodiment of the above technical solution, the modified connector has a shell, the assembly end of the shell extends axially to form a cylinder, an annular buckle 1 is provided on the outer ring side wall of the cylinder, an annular groove 1 is provided on the inner ring side wall of the shell, and the annular buckle 1 is adapted to the annular groove 1;

[0014] A milling flat key position 1 is arranged on the outer ring side wall of the cylinder, and a milling flat key position 2 is arranged on the inner ring side wall of the shell, and the milling flat key position 1 is adapted to the milling flat key position 2; the annular groove is distributed on the upper shell and the lower shell, and the milling flat key position 2 is distributed on the upper shell and the lower shell.

[0015] As a preferred embodiment of the above technical solution, it also includes a support frame assembly, which includes a support frame threadedly assembled with the lower shell, and screw mounting bosses are arranged on the upper and lower end faces of the support frame. The two rigid printed circuit boards are respectively distributed on the upper and lower sides of the support frame and assembled with the corresponding screw mounting bosses through screws.

[0016] As a preferred embodiment of the above technical solution, the support frame assembly further includes an MT support shell, an MT support plate and a side cover plate which are sequentially distributed at the rear end of the support frame, the MT support shell and the side cover plate are assembled with the support frame by screws, and there is a gap of one between the MT support shell and the side cover plate;

[0017] The MT support shell is movably plugged with an MT support plate, and a spring 1 is arranged between the MT support plate and the side cover plate.

[0018] As a preferred embodiment of the above technical solution, the support frame assembly further includes a lens support plate 1 respectively mounted on the upper and lower ends of the support frame, the lens support plate 1 is mounted with a baffle by screws, a gap 2 is provided between the lens support plate 1 and the baffle, a lens support plate 2 is arranged in the gap 2, a spring 2 is arranged between one end of the lens support plate 2 and the lens support plate 1, and the other end of the lens support plate 2 movably passes through the opening on the baffle;

[0019] A plurality of protrusions are arranged on the end surface of the second lens support plate opposite to the printed circuit board assembly, and a guide groove matching the MT connector is formed between two adjacent protrusions.

[0020] As a preferred embodiment of the above technical solution, a second annular buckle is provided on the inner ring side wall of the housing, and a second annular groove is provided on the outer ring side wall of the tailstock, and the second annular buckle is adapted to the second annular groove;

[0021] A milling flat key position three is arranged on the inner ring side wall of the outer shell, and a milling flat key position four is arranged on the outer ring side wall of the tailstock, and the milling flat key position three is adapted to the milling flat key position four; the annular buckle two is distributed on the upper shell and the lower shell, and the milling flat key position three is distributed on the upper shell and the lower shell.

[0022] As a preferred embodiment of the above technical solution, the portion of the tailstock located outside the housing is sleeved with two relatively distributed optical cable reinforcement plates, and the optical cable reinforcement plates are assembled with the housing by screws;

[0023] Each of the optical cable reinforcement plates is connected to the upper shell and the lower shell respectively.

[0024] The beneficial effects of the present invention are:

[0025] 1. A highly integrated plug-in circular active connector optical cable assembly in the technical solution, with a modified connector as an electrical interface, a pin contact in its cavity passing through a welding hole and being welded to a rigid printed circuit board 1, a photoelectric / electro-optical conversion chip is affixed to the surface of a rigid printed circuit board 2 embedded with a molybdenum copper block, a photoelectric / electro-optical conversion circuit is provided on the rigid printed circuit board 2, the photoelectric / electro-optical conversion chip is electrically interconnected by gold wire bonding with the rigid printed circuit board 2, and then lens coupling is performed, and an MT connector that is plugged into the optical interface on the lens leads out the optical signal through an optical cable.

[0026] Since the photoelectric / electro-optical conversion chips mounted on the second rigid printed circuit board emit and receive light vertically, the photoelectric / electro-optical conversion chips are coupled with lenses. On the one hand, the lens protects the photoelectric / electro-optical conversion chips and the gold wires. On the other hand, the optical path can be rotated 90° to be parallel to the second direction of the rigid printed circuit board, ensuring that the center line of the optical cable and the active electrical connector cable assembly are on the same center line to achieve coaxial fiber output; the lens can be installed in conjunction with the MT connector to achieve the operation of the active electrical connector cable assembly, so that the optical signal is led out through the optical cable, while shortening the length of the internal switching optical fiber.

[0027] 2. The photoelectric / electro-optical conversion module in this technical solution is implemented by a printed circuit board assembly, which is specifically composed of three rigid printed circuit boards and two flexible printed circuit boards. The printed circuit board assembly is a butterfly structure. The rigid printed circuit board 1 is an intermediate sub-board that can be inserted into the modified connector for welding and fixing. The left and right rigid printed circuit boards 2 adopt the same design and are both provided with photoelectric / electro-optical conversion circuits. They are installed by bending the flexible printed circuit boards during assembly. The photoelectric / electro-optical conversion circuits on the two rigid printed circuit boards 2 are independently powered and back up each other, solving the requirement that active electrical connector optical cable assemblies have dual backup functions for military products. In addition, the design of the printed circuit board assembly in the technical solution can greatly shorten the size of the printed circuit board and improve the space utilization rate in the circular cavity.

[0028] 3. A highly integrated plug-in circular active connector cable assembly in this technical solution can compress the length of the active electrical connector cable assembly to about 60 mm. It has a compact structure and is easy to install, and is suitable for various applications with tight space. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shown is an exploded schematic diagram of a highly integrated in-line circular active connector optical cable assembly in Example 1;

[0030] Figure 2 Shown is a schematic structural diagram of the modified connector in Example 1;

[0031] Figure 3 What is shown is a schematic diagram of the structure of the printed circuit board assembly in Example 1;

[0032] Figure 4 It shows Figure 3 A schematic cross-sectional view of the structure of the printed circuit board assembly;

[0033] Figure 5 Shown is a schematic diagram of the structure of the optical cable assembly in Example 1;

[0034] Figure 6 What is shown is a schematic diagram of the structure of the support frame assembly in Example 1;

[0035] Figure 7 Shown is an exploded schematic diagram of the support frame assembly in Example 1;

[0036] Figure 8 The figure shows a physical structure diagram of a highly integrated direct-plug circular active connector optical cable assembly in Example 1.

[0037] Figure numerals: modified connector 1; shell 11; printed circuit board assembly 2; rigid printed circuit board 1 21; flexible printed circuit board 22; rigid printed circuit board 2 23; molybdenum copper block 24; lens 25; photoelectric / electro-optical conversion chip 26; support frame assembly 3; support frame 31; MT support shell 32; MT support plate 33; spring 1 34; side cover plate 35; lens support plate 1 36; spring 2 37; baffle 38; lens support plate 2 39; upper shell 4; lower shell 5; optical cable assembly 6; MT connector 61; tail seat 62; optical cable reinforcement plate 7. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0039] Example 1

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the modified connector 1 in this embodiment is a J599III series connector, a highly integrated straight-plug circular active connector optical cable assembly, comprising a modified connector 1, a housing connected to the assembly end of the modified connector 1, a printed circuit board assembly 2 fixedly arranged inside the housing, and an optical cable assembly 6, wherein the printed circuit board assembly 2 comprises a rigid printed circuit board 1 21 welded with the pin contact in the modified connector 1, both ends of the rigid printed circuit board 1 21 are connected to flexible printed circuit boards 22, the middle part of the flexible printed circuit board 22 is bent outward, and the end is connected to a rigid printed circuit board 2 23, and a molybdenum copper block 24 is embedded in the rigid printed circuit board 23. More specifically, each rigid printed circuit board 23 is provided with two rectangular holes, and four molybdenum copper blocks 24 are embedded in the corresponding rectangular holes, and the ends of the molybdenum copper blocks 24 are oppositely arranged to the rigid printed circuit board 2 3 is flush with the surface and affixed with a photoelectric / electro-optical conversion chip 26. A photoelectric / electro-optical conversion circuit is provided on the rigid printed board 23, which can realize the conversion of external input optical signals into electrical signals for transmission or the conversion of external input electrical signals into optical signals for transmission. More specifically, 8-way photoelectric conversion and 8-way electro-optical conversion are provided on the rigid printed board 23. The photoelectric / electro-optical conversion chip 26 and the rigid printed board 23 are electrically interconnected by gold wire bonding. A lens 25 covering the photoelectric / electro-optical conversion chip 26 is provided on the rigid printed board 23. An optical interface is provided on the lens 25. Since the photoelectric / electro-optical conversion chip 26 emits light vertically (or receives light vertically), the function of the lens 25 is to convert the optical path of the photoelectric / electro-optical conversion chip 26 by 90°, so that the fiber output direction of the optical cable is in the same straight line with the center line of the modified connector 1.

[0041] The optical cable assembly 6 includes a tail seat 62, from which multiple groups of optical cables are led out, and the end of each group of optical cables is equipped with an MT connector 61. More specifically, the optical cable assembly 6 contains 48-core optical cables, from which four groups of 12-core optical cables are led out and assembled with 12-core MT connectors. The four MT connectors 61 are plugged into the corresponding optical interfaces on the four lenses 25 respectively, and the tail end of the tail seat 62 passes through the outer shell and extends to the outside of the outer shell.

[0042] A highly integrated plug-in circular active connector optical cable assembly in the present technical solution, a modified connector 1 is used as an electrical interface, the pin contact in its cavity is welded to a rigid printed board 1 21 through a welding hole, a photoelectric / electro-optical conversion chip 26 is attached to the surface of a rigid printed board 2 23 embedded with a molybdenum copper block 24, a photoelectric / electro-optical conversion circuit is provided on the rigid printed board 2 23, the photoelectric / electro-optical conversion chip 26 is gold-wire bonded to the rigid printed board 2 23 to achieve electrical interconnection, and then a lens 25 is coupled, and an MT connector 61 plugged into the optical interface on the lens 25 leads the optical signal out through the optical cable.

[0043] Since the photoelectric / electro-optical conversion chip 26 mounted on the rigid printed circuit board 23 emits light vertically and receives light vertically, the photoelectric / electro-optical conversion chip 26 is coupled with a lens 25. On the one hand, the lens 25 protects the photoelectric / electro-optical conversion chip 26 and the gold wire. On the other hand, the optical path can be rotated 90° to be parallel to the direction of the rigid printed circuit board 23, ensuring that the center line of the optical cable and the active electrical connector optical cable assembly are on the same center line to achieve coaxial fiber output; the lens 25 can be installed in conjunction with the 12-core MT connector 61, so that the optical signal can be led out through the optical cable when the active electrical connector optical cable assembly is working, while shortening the length of the internal switching optical fiber.

[0044] The photoelectric / electro-optical conversion module in the technical solution is implemented by a printed circuit board assembly 2, which is specifically composed of three rigid printed circuits and two flexible printed circuits. The printed circuit board assembly 2 is a butterfly structure. The rigid printed circuit board 1 21 is an intermediate sub-board that can be inserted into the modified connector 1 for welding and fixing. The left and right rigid printed circuit boards 23 are of the same design and are both provided with photoelectric / electro-optical conversion circuits. They are installed by bending the flexible printed circuit board 22 during assembly. The photoelectric / electro-optical conversion circuits on the two rigid printed circuit boards 23 are independently powered and work as backup for each other, thereby solving the requirement that active electrical connector optical cable assemblies have dual backup functions for military products. In addition, the design of the printed circuit board assembly 2 in the technical solution can greatly shorten the size of the printed circuit board and improve the space utilization rate in the circular cavity.

[0045] A highly integrated plug-in circular active connector cable assembly in the technical solution can compress the length of the active electrical connector cable assembly to about 60 mm, has a compact structure, is easy to install, and is suitable for various applications with limited space.

[0046] like Figure 2 , Figure 3 As shown, the rigid printed circuit board 21 is provided with welding holes whose number matches that of the pin contacts. In this embodiment, 76 pin contacts are provided. The pin contacts in the modified connector 1 pass through the welding holes and are welded to the rigid printed circuit board 21, thereby increasing the welding area between the pin contacts and the rigid printed circuit board 21, improving the welding effect, and ensuring the stability of the assembly between the modified connector 1 and the printed circuit board assembly 2.

[0047] When the active electrical connector cable assembly is working, the photoelectric / electro-optical conversion chip 26 is the main heat source, and the photoelectric / electro-optical conversion chip 26 is very sensitive to temperature, especially in a high temperature environment, which may cause the chip to work poorly or even fail. Figure 3 , Figure 4 As shown, the opposite ends of the molybdenum copper block 24 protrude from the surface of the rigid printed circuit board 23 and overlap with the housing through the thermal pad.

[0048] In the printed circuit board assembly 2, a molybdenum-copper block 24 is partially embedded to dissipate heat. The molybdenum-copper block 24 itself has good thermal conductivity. A rectangular hole is partially opened in the rigid printed circuit board 23 to embed the molybdenum-copper block 24 of a suitable size. One end of the embedded molybdenum-copper block 24 is flush with the rigid printed circuit board 23 and the photoelectric / electro-optical conversion chip 26 is mounted on the surface. The other end of the molybdenum-copper block 24 protrudes from the surface of the rigid printed circuit board 23 and is overlapped with the shell through a thermal pad, so that the heat generated by the photoelectric / electro-optical conversion chip 26 when working is quickly conducted to the upper shell 4 and the lower shell 5 for heat dissipation, ensuring the application of the product in an extremely high temperature environment and meeting the requirement that the photoelectric / electro-optical conversion module must have good heat dissipation capability.

[0049] In order to improve the convenience of assembly, the shell is divided into two parts, as shown in the following figure: Figure 1 As shown, the housing includes an upper housing 4 and a lower housing 5 which are relatively distributed, and the upper housing 4 and the lower housing 5 are assembled by screws to form a complete housing.

[0050] like Figure 1 , Figure 2 As shown, the modified connector 1 has a shell 11, the assembly end of the shell 11 extends axially to form a cylinder, an annular buckle 1 is provided on the outer ring side wall of the cylinder, an annular groove 1 is provided on the inner ring side wall of the shell, and the annular buckle 1 is adapted to the annular groove 1; a milling flat key position 1 is provided on the outer ring side wall of the cylinder, and a milling flat key position 2 is provided on the inner ring side wall of the shell, and the milling flat key position 1 is adapted to the milling flat key position 2; the annular grooves are distributed on the upper shell 4 and the lower shell 5, and the milling flat key position 2 is distributed on the upper shell 4 and the lower shell 5.

[0051] After the modified connector 1 and the shell are assembled in place, the annular buckle 1 is matched with the annular groove 1 to limit the axial position between the modified connector 1 and the shell to avoid axial displacement between the two; the milled flat key position 1 is matched with the milled flat key position 2 to limit the circumferential position between the modified connector 1 and the shell to avoid rotation between the two. In the technical solution, the modified connector 1 and the shell are matched with the annular buckle 1 and the annular groove 1, and the milled flat key position 1 and the milled flat key position 2. On the one hand, the freedom of the components in various directions after assembly is limited to prevent relative displacement between the components and ensure the stability of the position between the modified connector 1 and the shell; on the other hand, the sealing between the modified connector 1 and the shell is ensured; the problem that the fixing method of the integrated optoelectronic / electro-optical conversion module in the J599 III series connector shell is difficult to design due to the cylindrical wall.

[0052] Furthermore, to ensure the stable assembly of the internal structure of the active connector cable assembly and to ensure reliable installation, such as Figure 6 , Figure 7As shown, a highly integrated plug-in circular active connector optical cable assembly also includes a support frame assembly 3, the support frame assembly 3 includes a support frame 31 threadedly assembled with the lower shell 5, and screw mounting bosses are arranged on the upper and lower end surfaces of the support frame 31. Two rigid printed circuit boards 23 are respectively distributed on the upper and lower sides of the support frame 31 and assembled with the corresponding screw mounting bosses through screws.

[0053] The printed circuit board assembly 2 is fixed by the support frame assembly 3, and the support frame assembly 3 is fixed on the lower shell 5, so as to prevent the flexible printed circuit 22 in the printed circuit board assembly 2 from being displaced and subjected to force, thereby ensuring the fixed assembly of the printed circuit board assembly 2 and the optical cable assembly 6 inside the shell.

[0054] Regarding the fixation of the position of the MT connector 61 in the optical cable assembly 6, as shown in FIG. Figure 6 , Figure 7 As shown, the support frame assembly 3 also includes an MT support shell 32, an MT support plate 33 and a side cover plate 35 which are sequentially distributed at the rear end of the support frame 31. The MT support shell 32 and the side cover plate 35 are assembled with the support frame 31 by screws, and there is a gap 1 between the MT support shell 32 and the side cover plate 35; the MT support plate 33 is movably plugged into the MT support shell 32, and a spring 1 34 is provided between the MT support plate 33 and the side cover plate 35.

[0055] When installing this part of the support frame assembly 3, first fix the MT support shell 32 to the rear end of the support frame 31 by screws, install the MT support plate 33 into the interior of the MT support shell 32, install the spring 1 34, and then assemble the side cover plate 35 with the support frame 31 by screws. There is a gap 1 between the MT support shell 32 and the side cover plate 35. The MT support plate 33 can be displaced in the interior of the MT support shell 32 and in the gap 1. Under the action of the spring 1 34, when the MT connector 61 and the optical interface of the lens 25 are plugged in, the MT support plate 33 and the MT connector 61 are elastically in contact, thereby preventing the MT connector 61 from loosening.

[0056] Regarding the fixing of the position of the lens 25 in the support frame assembly 3, as shown in FIG. Figure 6 , Figure 7 As shown, the support frame assembly 3 also includes a lens support plate 36 respectively mounted on the upper and lower ends of the support frame 31, the lens support plate 36 is mounted with a baffle 38 by screws, a gap 2 is provided between the lens support plate 36 and the baffle 38, a lens support plate 39 is provided in the gap 2, a spring 2 37 is provided between one end of the lens support plate 39 and the lens support plate 36, and the other end of the lens support plate 39 is movable through the opening on the baffle 38.

[0057] When installing this part of the support frame assembly 3, first assemble the lens support plate 36 on the support frame 31, and place the spring 2 37, the lens support plate 2 39, and the baffle 38 on the end face of the lens support plate 36 in sequence, wherein the upper end of the lens support plate 2 39 passes through the opening on the baffle 38, and the baffle 38 is assembled with the lens support plate 36 by screws. The lens support plate 2 39 can be displaced in the up and down directions in the gap 2. Under the action of the spring 2 37, the lens support plate 2 39 is in elastic contact with the lens 25, and plays a role in supporting and fixing the lens 25 in the vertical direction. At the same time, a plurality of protrusions are arranged on the end face of the lens support plate 2 39 opposite to the printed circuit board assembly 2, and a guide groove matching the MT connector 61 is formed between two adjacent protrusions, providing a guiding function when the MT connector 61 is plugged and installed.

[0058] The setting of the support frame assembly 3 supports and limits the printed circuit board assembly 2 and the optical cable assembly 6, ensuring the stable assembly of the internal structure of the active connector optical cable assembly and reliable installation, solving the problem that the optoelectronic / electro-optical conversion module needs to lead out the optical signal through the optical cable, and the optical cable and the optoelectronic / electro-optical conversion module need to ensure the connection reliability.

[0059] To improve the stability of the assembly between the optical cable assembly 6 and the housing, as Figure 1 , Figure 5 As shown, an annular buckle 2 is provided on the inner ring side wall of the shell, an annular groove 2 is provided on the outer ring side wall of the tail stock 62, and the annular buckle 2 is adapted to the annular groove 2; a milling flat key position 3 is provided on the inner ring side wall of the shell, a milling flat key position 4 is provided on the outer ring side wall of the tail stock 62, and the milling flat key position 3 is adapted to the milling flat key position 4; the annular buckle 2 is distributed on the upper shell 4 and the lower shell 5, and the milling flat key position 3 is distributed on the upper shell 4 and the lower shell 5.

[0060] In the active connector optical cable assembly, the upper shell 4 and the lower shell 5 are crimped to clamp the optical cable. After assembly, the annular buckle 2 is located inside the annular groove 2 to limit the axial position between the optical cable assembly 6 and the outer shell to prevent the optical cable assembly 6 from being displaced in the axial direction; the milling key position 3 is matched with the milling key position 4 to limit the circumferential position between the optical cable assembly 6 and the outer shell to prevent the optical cable assembly 6 from rotating.

[0061] To improve the overall strength of the optical cable assembly 6, Figure 1 , Figure 5 As shown, the portion of the tail seat 62 located outside the outer shell is provided with two relatively distributed optical cable reinforcement plates 7, and the optical cable reinforcement plates 7 are assembled with the outer shell by screws; further, in order to improve the stability of the assembly, each optical cable reinforcement plate 7 is connected to the upper shell 4 and the lower shell 5 respectively; the optical cable reinforcement plate 7 is fixed to the structural end face of the optical cable lead-out position, which has the function of reinforcing the optical cable assembly 6 and preventing the optical cable assembly 6 from shaking and being stressed.

[0062] A highly integrated direct-insertion circular active connector optical cable assembly in the technical solution is assembled by the following steps:

[0063] 1. Insert the plug-in contact on the modified connector 1 into the welding hole on the rigid printed circuit board 21 for welding;

[0064] 2. Place the support frame assembly 3 between the two rigid printed boards 23, and make the lens support board 29 contact the lens 25. Then, assemble the rigid printed board 23 with the screw mounting boss on the support frame 31 by screws.

[0065] 3. Plug and match the MT connector 61 in the optical cable assembly 6 with the optical interface on the lens 25;

[0066] 4. Assemble the support frame 31 to the lower shell 5 by screws;

[0067] 5. Place the upper shell 4 opposite to the lower shell 5, with the head end clamped to the housing 11 and the tail end clamped to the tailstock 62, and assemble the upper shell 4 and the lower shell 5 with screws;

[0068] 6. Sleeve the optical cable reinforcement plate 7 on the tail seat 62, and then assemble it with the upper shell 4 and the lower shell 5 by screws.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A highly integrated in-line circular active connector optical cable assembly, comprising a modified connector (1), a housing connected to the assembly end of the modified connector (1), a printed circuit board assembly (2) fixedly arranged inside the housing, and an optical cable assembly (6), characterized in that: The printed circuit board assembly (2) comprises a rigid printed circuit board (21) welded to the pin contact in the modified connector (1), both ends of the rigid printed circuit board (21) are connected to flexible printed circuit boards (22), the middle part of the flexible printed circuit board (22) is bent outwards and the ends are connected to rigid printed circuit boards (23), a molybdenum copper block (24) is embedded on the rigid printed circuit board (23), the ends of the molybdenum copper block (24) are arranged opposite to the surface of the rigid printed circuit board (23) and are affixed with a photoelectric / electro-optical conversion chip (26), a photoelectric / electro-optical conversion circuit is arranged on the rigid printed circuit board (23), the photoelectric / electro-optical conversion chip (26) and the rigid printed circuit board (23) are electrically interconnected by gold wire bonding, a lens (25) covering the photoelectric / electro-optical conversion chip (26) is arranged on the rigid printed circuit board (23), and an optical interface is arranged on the lens (25); The optical cable assembly (6) comprises a tail seat (62), from which a plurality of optical cables are led, and an MT connector (61) is mounted at the end of each group of optical cables, the MT connector (61) being plugged into a corresponding optical interface on the lens (25), and the tail end of the tail seat (62) passes through the housing and extends to the outside of the housing.

2. A highly integrated in-line circular active connector optical cable assembly according to claim 1, characterized in that: The rigid printed circuit board (21) is provided with welding holes whose number matches the pin contacts, and the pin contacts in the modified connector (1) pass through the welding holes and are welded to the rigid printed circuit board (21).

3. The highly integrated in-line circular active connector optical cable assembly according to claim 1, characterized in that: The opposite ends of the molybdenum copper block (24) protrude from the surface of the second rigid printed circuit board (23) and are overlapped with the outer shell through a heat conducting pad.

4. The highly integrated in-line circular active connector optical cable assembly according to claim 1, characterized in that: The housing comprises an upper housing (4) and a lower housing (5) which are relatively distributed, and the upper housing (4) and the lower housing (5) are assembled by screws to form a complete housing.

5. A highly integrated in-line circular active connector optical cable assembly according to claim 4, characterized in that: The modified connector (1) comprises a shell (11), the assembly end of the shell (11) is axially extended to form a cylinder, an annular buckle 1 is arranged on the outer ring side wall of the cylinder, an annular groove 1 is arranged on the inner ring side wall of the shell, and the annular buckle 1 is adapted to the annular groove 1; A milling flat key position 1 is arranged on the outer ring side wall of the cylinder, and a milling flat key position 2 is arranged on the inner ring side wall of the shell, and the milling flat key position 1 is adapted to the milling flat key position 2; the annular groove is distributed on the upper shell (4) and the lower shell (5), and the milling flat key position 2 is distributed on the upper shell (4) and the lower shell (5).

6. The highly integrated direct-insertion circular active connector optical cable assembly according to claim 4, characterized in that: It also includes a support frame assembly (3), the support frame assembly (3) includes a support frame (31) threadedly assembled with the lower shell (5), the upper and lower end surfaces of the support frame (31) are provided with screw mounting bosses, and the two rigid printed circuit boards (23) are respectively distributed on the upper and lower sides of the support frame (31) and assembled with the corresponding screw mounting bosses through screws.

7. A highly integrated direct-insertion circular active connector optical cable assembly according to claim 6, characterized in that: The support frame assembly (3) further comprises an MT support shell (32), an MT support plate (33) and a side cover plate (35) which are sequentially distributed at the rear end of the support frame (31); the MT support shell (32) and the side cover plate (35) are assembled with the support frame (31) by means of screws, and a gap is provided between the MT support shell (32) and the side cover plate (35); An MT support plate (33) is movably plugged into the MT support shell (32), and a spring (34) is provided between the MT support plate (33) and the side cover plate (35).

8. The highly integrated direct-plug circular active connector optical cable assembly according to claim 7, characterized in that: The support frame assembly (3) further comprises a lens support plate (36) respectively mounted on the upper and lower ends of the support frame (31); the lens support plate (36) is mounted with a baffle (38) by means of screws; a gap (3) is provided between the lens support plate (36) and the baffle (38); a lens support plate (39) is provided in the gap (3); a spring (37) is provided between one end of the lens support plate (39) and the lens support plate (36); and the other end of the lens support plate (39) is movable through an opening on the baffle (38); A plurality of protrusions are arranged on the end surface of the second lens support plate (39) opposite to the printed circuit board assembly (2), and a guide groove matching the MT connector (61) is formed between two adjacent protrusions.

9. The highly integrated in-line circular active connector optical cable assembly according to claim 4, characterized in that: The inner ring side wall of the shell is provided with an annular buckle 2, and the outer ring side wall of the tailstock (62) is provided with an annular clamping groove 2, and the annular buckle 2 is adapted to the annular clamping groove 2; A milling flat key position three is arranged on the inner ring side wall of the outer shell, and a milling flat key position four is arranged on the outer ring side wall of the tailstock (62), and the milling flat key position three is adapted to the milling flat key position four; the annular buckle two is distributed on the upper shell (4) and the lower shell (5), and the milling flat key position three is distributed on the upper shell (4) and the lower shell (5).

10. The highly integrated direct-insertion circular active connector optical cable assembly according to claim 4, characterized in that: The portion of the tailstock (62) located outside the housing is sleeved with two optical cable reinforcement plates (7) that are distributed opposite to each other, and the optical cable reinforcement plates (7) are assembled with the housing by means of screws; Each of the optical cable reinforcement plates (7) is connected to the upper shell (4) and the lower shell (5) respectively.

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