Photoelectric hybrid adapter

Abstract

The photoelectric hybrid adapter comprises an outer shell, an inner shell, a conductive terminal and a sleeve, the outer shell is of an integrated structure, a channel penetrating through the two ends of the outer shell is formed in the outer shell, a pipe cavity for containing the sleeve is formed in the channel, and a strip-shaped groove penetrating through the side wall of the outer shell is formed in the side face of the outer shell; the inner shell is of an integrated structure and is arranged in the channel, and a bidirectional axial limiting structure is arranged between the inner shell and the outer shell so that bidirectional axial limiting of the inner shell can be achieved. Gaps used for installing the conductive terminals are formed between the two opposite sides of the inner shell and the inner wall of the outer shell, and the gaps are aligned with and communicated with the strip-shaped grooves. The conductive terminals are installed in the gaps through the strip-shaped grooves, and pins of the conductive terminals extend out of the strip-shaped grooves. The structure of the photoelectric hybrid adapter can be simplified, the strength of the outer shell and the inner shell is enhanced, and rapid assembly is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of optoelectronic connector technology, and specifically relates to an optoelectronic hybrid adapter. Background Technology

[0002] With the continued development and advancement of dual-gigabit 5G and F5G networks, the demand for optical access technologies in the last 100 meters or so—such as all-optical campus (POL, Passive Optical LAN) and all-optical home (FTTR, fiber to the room)—is becoming increasingly widespread. The demand for low-power terminal scenarios (≤100W) such as fiber to the desktop, fiber to the camera, and fiber to the access point (AP) is countless. Fiber to the point of contact will form the foundational infrastructure for high-speed and timely communication in the intelligent era, ensuring the massive information and high-quality bandwidth demands of the intelligent age. Optical-electrical hybrid active connectors can complete data transmission through a single optical fiber while simultaneously using a pair of electrical conductors to deliver power, integrating data transmission and power supply. This makes line connections more convenient and faster, making it an important solution for fiber to the point of contact scenarios.

[0003] In the optoelectronic hybrid connector and optoelectronic adapter disclosed in application publication number CN 113917626 A, the optoelectronic adapter product assembly structure has two forms: the first is a symmetrical assembly structure, in which the inner cavity of the two inner shells assembled together is used to accommodate the ceramic sleeve, and the two outer shells are assembled from both sides to accommodate and fix the inner shells and conductive terminals; the second method is to change the outer shell to a skylight structure, and after the inner shells and conductive terminals are assembled from the skylight, the top cover is then assembled and fixed.

[0004] The above structure has the following defects: (1) The outer shell is a two-piece structure, connected by ultrasonic welding in the middle. The connection is unstable and prone to cracking and separation. (2) The inner shells are all two-piece structures. There is no fixed connection between the two inner shells. They are only fixed together by the outer shells being squeezed together. The middle connection part connecting the two cantilever arms is thin. When the adapter and plug are connected, the middle connection part is prone to deformation and damage when the cantilever arms are opened. (3) When the bottom pins of the conductive terminals protrude from the bottom of the housing, and the housing is assembled from both sides, the slots at the bottom for protruding the pins are not aligned and the pins are easily bent. (4) The product has a large number of parts, a complex assembly structure, and high cost. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a photoelectric hybrid adapter, in which the inner shell and outer shell are both integral structures, enhancing the strength of individual parts. Furthermore, during assembly, only the conductive terminals need to be inserted from the side of the outer shell, making assembly more convenient.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a photoelectric hybrid adapter, comprising an outer shell, an inner shell, conductive terminals and a sleeve, wherein the outer shell is an integral structure, and a channel is provided inside the outer shell through both ends, and a cavity for accommodating the sleeve is provided in the channel; a strip groove is provided on the side of the outer shell through the side wall of the outer shell. The inner housing is an integral structure, disposed within the channel, and has a bidirectional axial limiting structure between it and the outer housing to achieve bidirectional axial limiting of the inner housing; gaps for installing the conductive terminals are formed between the opposite sides of the inner housing and the inner wall of the outer housing, and the gaps are aligned with and connected to the strip groove; The conductive terminal is inserted into the gap through the strip groove, and the pins of the conductive terminal extend out of the strip groove.

[0007] Its beneficial effects are: the outer shell and the inner shell are both integral structures, which reduces the number of parts in the entire adapter, enhances the strength of the outer shell and the inner shell, and makes assembly more convenient by simply inserting the conductive terminals from the side of the outer shell.

[0008] Furthermore, the outer shell is provided with an axially extending first sleeve, which is connected to the inner wall of the outer shell through a connecting part, and the two ends of the first sleeve are open; the inner shell includes an inner shell body and a second sleeve disposed on one side of the inner shell body, and the two ends of the second sleeve are open; after the inner shell is installed into the outer shell, the second sleeve and the first sleeve communicate to form a cavity for accommodating the sleeve.

[0009] Its beneficial effects are: the first sleeve and the second sleeve are respectively set on the outer shell and the inner shell, and the cavity for accommodating the sleeve is formed by the docking of the ends. This structure helps to integrate the inner shell while ensuring that the sleeve can be installed smoothly, and avoids the problem of having to disassemble the inner shell into two parts due to the inconvenience of sleeve installation.

[0010] Furthermore, the end of the first sleeve away from the connecting part is a constricted end, and the end connected to the connecting part is a straight end; the end of the second sleeve away from the inner shell body is a constricted end, and the end connected to the inner shell body is a straight end; the diameter of the constricted end is smaller than the diameter of the straight end, and the sleeve is inserted into the corresponding sleeve through the straight end.

[0011] Its beneficial effect is that the small diameter design at the constricted end can prevent the sleeve from falling out of the first or second sleeve.

[0012] Furthermore, the bidirectional axial limiting structure includes a stop-fitting structure between the connecting part and the inner shell body, and a convex-concave fitting structure. The limiting direction of the stop-fitting structure is the same as the insertion direction of the inner shell, and the limiting direction of the convex-concave fitting structure is opposite to the insertion direction of the inner shell.

[0013] Its beneficial effects are: the inner shell is constrained from two axial directions by the stop fit and the convex-concave fit, wherein the stop fit directly utilizes the setting structure of the first sleeve, making the overall structure more compact.

[0014] Furthermore, the convex-concave mating structure includes a recessed portion and a protruding portion that fit together; the recessed portion is disposed on the inner shell body, and the protruding portion is disposed on the inner wall of the outer shell body; or, the recessed portion is disposed on the inner wall of the outer shell body, and the protruding portion is disposed on the inner shell body.

[0015] Its beneficial effects are: to further clarify the specific structural form and setting position of the convex-concave mating structure, making it easier for users to choose and implement according to the actual situation.

[0016] Furthermore, the socket at one end of the outer shell is used as the mounting port for installing the inner shell. A guide slope is provided on the side of the protrusion facing the mounting port to guide the protruding structure in front of the recess over the protrusion so that the protrusion enters the recess.

[0017] Its beneficial effects are: the setting of the guide slope can help the protrusion and the recess to fit together, and can also provide feedback on the operation feel and indicate that the inner shell is installed in place.

[0018] Furthermore, the inner shell includes an inner shell body, and a first sleeve and a second sleeve are coaxially arranged on two opposite sides of the inner shell body. The first sleeve and the second sleeve are interconnected to form a cavity for accommodating the sleeve. The ends of the first sleeve and / or the second sleeve away from the inner shell body are provided with a plurality of cantilevered claws distributed circumferentially, and the plurality of cantilevered claws form a constriction with a variable diameter.

[0019] Its beneficial effect is that it provides another implementation of the cavity structure, with both sleeve structures set on the inner shell, which can ensure the coaxiality of the two sleeves and avoid skewing after the sleeve is installed.

[0020] Furthermore, the bidirectional axial limiting structure includes a groove structure and a protruding structure with a convex-concave fit; A left limiting protrusion and a right limiting protrusion are provided axially at intervals on the inner wall of the outer shell, and the groove structure is formed between the left limiting protrusion and the right limiting protrusion; The protruding structure is provided on the inner shell body of the inner shell; The inner shell is positioned in both axial directions by having its protruding structure engage with the groove structure.

[0021] Its beneficial effects are: to further clarify a specific structural form and setting position of the bidirectional axial limiting structure, making it easier for users to choose and implement it according to actual conditions.

[0022] Furthermore, the socket at one end of the outer shell is used as the mounting port for installing the inner shell. Among the left and right limiting protrusions, the side of the limiting protrusion facing the mounting port is provided with a guiding slope to guide the protruding structure over the corresponding limiting protrusion.

[0023] Its beneficial effects are: the setting of the guide slope can help the cooperation between the protruding structure and the limiting protrusion, and can also provide feedback on the operation feel, indicating that the inner shell is installed in place.

[0024] Furthermore, the bidirectional axial limiting structure includes a recessed structure and a protruding structure with a convex-concave fit; the recessed structure is disposed on the inner wall of the outer shell, and the protruding structure is disposed on the inner shell body of the inner shell; or, the recessed structure is disposed on the inner shell body of the inner shell, and the protruding structure is disposed on the inner wall of the outer shell.

[0025] Its beneficial effects are: to further clarify another specific structural form and setting position of the bidirectional axial limiting structure, making it easier for users to choose and implement it according to actual conditions.

[0026] Furthermore, the lower surface of the outer casing is provided with the strip groove, which is a contoured groove that matches the shape of the conductive terminal, and the installation direction of the conductive terminal is perpendicular to the axis of the optoelectronic hybrid adapter.

[0027] Its beneficial effect is that the installation direction of the conductive terminals is limited by the structure of the strip groove, and users can choose to implement it according to the actual situation.

[0028] Furthermore, the lower surface of the outer casing is provided with the strip groove, which extends to one end of the outer casing and opens at that end face. The installation direction of the conductive terminal is parallel to the axial direction of the optoelectronic hybrid adapter.

[0029] Its advantages are: this scheme defines another installation direction for the conductive terminals, and the pins of the conductive terminals slide along the strip groove, so the strip groove can be designed as a straight groove, and users can choose to implement it according to the actual situation; in this scheme, the conductive terminals can be pre-assembled on the inner shell and then installed into the outer shell together with the inner shell, making the assembly more convenient and faster. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention; Figure 3 This is a sectional view of the outer casing of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the inner shell of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention; Figure 5 This is a cross-sectional view of the outer and inner housings of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the axial limiting structure of the outer shell and inner shell of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the mounting structure of the outer shell and conductive terminals of the optoelectronic hybrid adapter described in Embodiment 1 of the present invention; Figure 8 This is an exploded view of the optoelectronic hybrid adapter described in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the inner shell of the optoelectronic hybrid adapter described in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of an axial limiting structure for the outer and inner shells of the optoelectronic hybrid adapter described in Embodiment 2 of the present invention; Figure 11 This is a schematic diagram of another axial limiting structure between the outer shell and the inner shell of the optoelectronic hybrid adapter described in Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the optoelectronic hybrid adapter described in Embodiment 3 of the present invention; Figure 13 This is an exploded view of the optoelectronic hybrid adapter described in Embodiment 3 of the present invention; The markings in the diagram are: 1. Outer shell, 2. Inner shell, 3. Conductive terminal, 4. Sleeve, 5. Channel, 6. First sleeve, 7. Connecting part, 8. Inner shell body, 9. Cantilever, 10. Barb, 11. Recess, 12. Second sleeve, 13. Terminal positioning block, 14. Clearance groove, 15. Protrusion, 16. Guide slope, 17. Terminal body, 18. Contact spring, 19. Pin, 20. Positioning hole, 21. Strip groove, 22. Cantilever claw, 23. Left limiting protrusion, 24. Right limiting protrusion, 25. Protruding structure, 26. Recessed structure, 27. Concave surface. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments, but this should not be construed as limiting the invention in any way.

[0032] Example 1 like Figures 1-2As shown, an optoelectronic hybrid adapter includes an outer shell 1, an inner shell 2, conductive terminals 3, and a sleeve 4, wherein the inner shell 2, conductive terminals 3, and sleeve 4 are disposed inside the outer shell 1.

[0033] like Figures 2-3 As shown, the outer shell 1 is a one-piece structure with a socket at each end for inserting corresponding optoelectronic hybrid connectors. The outer shell 1 has a channel 5 passing through the two sockets. A first sleeve 6 extending into one of the sockets is disposed within the channel 5. One end of the first sleeve 6, which mates with the inner shell 2, is a straight cylindrical end with a straight opening. The other end of the first sleeve 6 is a constricted end with a smaller diameter than the straight cylindrical end. The diameter of the straight cylindrical end matches the inner diameter of the first sleeve 6 and the outer diameter of the sleeve 4. One side or opposite sides of the straight cylindrical end of the first sleeve 6 are connected to the inner wall of the outer shell 1 via a connecting part 7. The side of the connecting part 7 facing away from the constricted end of the first sleeve 6 serves as a stop surface for axially limiting the inner shell 2.

[0034] like Figure 4 As shown, the inner shell 2 is an integral structure, including an inner shell body 8, a second sleeve 12, and a cantilever 9. The inner shell body 8 has a plate-like structure, with the second sleeve 12 disposed on one side. The inner diameter of the second sleeve 12 is equal to the inner diameter of the first sleeve 6. The two ends of the second sleeve 12 have the same structure as the two ends of the first sleeve 6, namely a straight end and a constricted end, respectively. The straight end is connected to the inner shell body 8. The diameters of the straight end and the constricted end on the second sleeve 12 are equal to the diameters of the straight end and the constricted end on the first sleeve 6, respectively. Figure 5 As shown, the inner shell 2 is inserted into the outer shell 1 from one end. The second sleeve 12 and the first sleeve 6 are connected through a through hole on the inner shell body 8 to form a cavity for accommodating the sleeve 4. The two ends of the sleeve 4 are respectively limited by the constricted ends of the first sleeve 6 and the second sleeve 12 to prevent the sleeve 4 from falling out. After the inner shell 2 is inserted into the outer shell 1, the inner shell body 8 can abut against the stop surface of the connecting part 7, thereby limiting the insertion depth of the inner shell 2 and achieving axial limiting of the inner shell 2 from the insertion direction. Specifically, the inner shell body 8 has an axial concave surface 27 on the side away from the second sleeve 12 where the conductive terminal 3 does not need to be installed. The concave surface 27 cooperates with the stop of the connecting part 7.

[0035] A convex-concave fitting structure is provided between the inner housing 2 and the outer housing 1, which can axially limit the inner housing 2 in a direction opposite to the insertion direction of the inner housing 2, thereby forming a fit with the limiting of the connecting part 7, clamping the inner housing 2 from two directions, and preventing the inner housing 2 from moving during the insertion and removal process of the optoelectronic hybrid connector. Specifically, as shown in... Figure 4 , 6As shown, the inner shell body 8 has a recessed portion 11 on its periphery. The depth of the recessed portion 11 in the axial direction is less than the thickness of the inner shell body 8, and the recessed portion 11 is arranged on the same side as the second sleeve 12. Specifically, the recessed portion 11 is distributed on both sides or one side of the concave surface 27; a protrusion 15 is provided on the inner wall of the outer shell body 1, and a guide slope 16 is provided on one side of the protrusion 15. During the process of the inner shell 2 being installed into the outer shell body 1, the inner shell body 8 presses the protrusion 15 along the guide slope 16, and finally the protrusion 15 falls into the recessed portion 11, forming an axial limit on the inner shell 2 in the direction opposite to the installation direction of the inner shell 2.

[0036] In other embodiments, the protrusion 15 may also be provided on the inner shell body 8, and the recess 11 may be provided on the inner wall of the outer shell body 1, which can also play a role in axially limiting the inner shell body 2.

[0037] It should be noted that conductive terminals 3 need to be installed on the left and right sides of the inner shell 2. Therefore, the connecting part 7 and the protrusion 15 on the outer shell 1 and the recess 11 on the inner shell body 8 are all located on the upper and lower sides where conductive terminals 3 do not need to be installed. The standard for "left" and "right" and "upper" and "lower" is: the side where the optoelectronic hybrid adapter is connected to the PCB board is "lower", the corresponding side is "upper", and the other two opposite sides are "left" and "right".

[0038] The inner shell 2 has two cantilever arms 9 extending in two axial directions on its inner shell body 8. The two cantilever arms 9 in the same direction are symmetrical about the central axis of the second sleeve 12. The inner side of the cantilever arm 9 is provided with a barb 10 for locking with the compatible optoelectronic hybrid connector, and the outer side of the cantilever arm 9 is provided with a clearance groove 14. The cantilever arm 9 and barb 10 structure in this embodiment is a standard locking structure in connectors. A terminal positioning block 13 is provided on each of the two opposite peripheral sides of the inner shell body 8. The conductive terminal 3 is positioned in the gap between the inner shell 2 and the outer shell 1 through the terminal positioning block 13.

[0039] like Figure 7 As shown, the conductive terminal 3 is an integral sheet structure, including a terminal body 17 in the middle, contact springs 18, and several pins 19. The contact springs 18 and pins 19 are connected to the terminal body 17. There are two contact springs 18, distributed at opposite ends of the terminal body 17. The terminal body 17 is provided with positioning holes 20 for engaging with the terminal positioning blocks 13 on the inner shell body 8 to fix the conductive terminal 3.

[0040] The outer casing 1 has two strip-shaped grooves 21, which penetrate the sidewall of the outer casing 1 and are contoured grooves that match the outline of the conductive terminal 3. The conductive terminal 3 passes through the strip-shaped grooves 21 and is inserted into the gap between the inner wall of the outer casing 1 and the inner casing 2, and is fixed by the terminal positioning block 13. The front end of the contact spring 18 corresponds to the clearance groove 14 on the cantilever 9, and the clearance groove 14 provides deformation space for the contact spring 18. The pin 19 protrudes from the strip-shaped groove 21 and is used to connect to the PCB board. Therefore, in this embodiment, the installation direction of the conductive terminal 3 is perpendicular to the axis of the optoelectronic hybrid adapter.

[0041] Example 2 like Figures 8-11 As shown, the difference between this embodiment and Embodiment 1 is that a first sleeve 6 and a second sleeve 12 are provided on the inner shell 2, while the first sleeve 6 is no longer provided in the channel 5 of the outer shell 1. Specifically, as... Figure 9 As shown, the inner shell body 8 of the inner shell 2 has a first sleeve 6 and a second sleeve 12 respectively provided on two opposite sides, which are connected to each other, forming a cavity to accommodate the sleeve 4. To facilitate the installation of the sleeve 4, the constricted ends on the first sleeve 6 and / or the second sleeve 12 are provided with a plurality of circumferentially spaced cantilever claws 22, which form a constriction with a variable diameter. When the sleeve 4 is inserted, the cantilever claws 22 can be forcefully opened, and after the sleeve 4 is inserted, the cantilever claws 22 can automatically return to their original position.

[0042] Another difference between this embodiment and embodiment 1 is that the axial limiting structure of the inner shell 2 is different. In embodiment 1, the limiting in two axial directions can be achieved by means of the cooperation of the connecting part 7 and the convex and concave limiting structure. However, in this embodiment, the first sleeve is no longer provided inside the outer shell 1, so the connecting part 7 is not present.

[0043] Based on this, this embodiment adjusts the convex-concave limiting structure and provides two specific convex-concave limiting structures, as follows: Figure 10 and Figure 11 As shown.

[0044] The first type of convex-concave limiting structure: such as Figure 10As shown, a left limiting protrusion 23 and a right limiting protrusion 24, axially spaced apart, are provided on the inner wall of the outer shell 1. A groove structure is formed between the two protrusions, and a guide slope 16 is provided on the side of the left limiting protrusion 23 or the right limiting protrusion 24 facing the corresponding end insertion port. This mainly depends on which end the inner shell 2 is inserted from. In this embodiment, the inner shell 2 is inserted from the left end insertion port, so a guide slope 16 is provided on the left limiting protrusion 23. A protruding structure 25 is provided on the inner shell body 8 of the inner shell 2. During the process of inserting the inner shell 2 into the outer shell 1, the protruding structure 25 of the inner shell 2 squeezes the guide slope 16 and passes over the corresponding limiting protrusion, and then gets stuck in the groove structure, realizing the limiting of the inner shell 2 in two axial directions.

[0045] The second type of convex-concave limiting structure: such as Figure 11 As shown, a recessed structure 26 is provided on the inner wall of the outer shell 1, and a protruding structure 25 is provided on the inner shell body 8 of the inner shell 2. During the process of the inner shell 2 being installed into the outer shell 1, the protruding structure 25 forms an axial limit after falling into the recessed structure 26. In other embodiments, the positions of the recessed structure 26 and the protruding structure 25 on the inner and outer shells can be interchanged.

[0046] Example 3 This embodiment is based on embodiment 2, the difference being the different installation method of the conductive terminal 3, such as... Figure 12 As shown, in this embodiment, a strip groove 21 provided on the outer casing 1 extends to one end of the outer casing 1 and opens at that end face. The conductive terminal 3 is inserted from the end of the outer casing 1 along the strip groove 21, and the pin 19 slides along the strip groove 21. Therefore, the strip groove 21 is a straight groove, and the insertion direction of the conductive terminal 3 is parallel to the axial direction of the optoelectronic hybrid adapter. The insertion depth of the conductive terminal 3 is positioned by controlling the length of the strip groove 21.

[0047] Further preferred, such as Figure 13 As shown, the opening of the strip groove 21 at the end of the outer shell 1 is located at the mounting port of the outer shell 1, that is, the inner shell 2 is installed in the insertion port on the outer shell 1. In this way, the two conductive terminals 3 can be pre-clamped on both sides of the inner shell 2 and then installed into the outer shell 1 together.

[0048] It should be noted that the arrangement of the strip groove 21 and the installation method of the conductive terminal 3 described in this embodiment can also be applied to the technical solution of Embodiment 1.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A photoelectric hybrid adapter, comprising an outer shell (1), an inner shell (2), conductive terminals (3), and a sleeve (4), characterized in that, The outer shell (1) is an integral structure, with a channel (5) passing through both ends of the outer shell (1) and a cavity for accommodating the sleeve (4) in the channel (5). The side of the outer shell (1) is provided with a strip groove (21) passing through the side wall of the outer shell (1). The inner shell (2) is an integral structure, which is set in the channel (5) and has a bidirectional axial limiting structure between it and the outer shell (1) to achieve bidirectional axial limiting of the inner shell (2); gaps for installing the conductive terminals (3) are formed between the opposite sides of the inner shell (2) and the inner wall of the outer shell (1), and the gaps are aligned with and connected to the strip groove (21); The conductive terminal (3) is inserted into the gap through the strip groove (21), and the pin (19) of the conductive terminal (3) extends out of the strip groove (21).

2. The optoelectronic hybrid adapter according to claim 1, characterized in that, The outer shell (1) is provided with an axially extending first sleeve (6), which is connected to the inner wall of the outer shell (1) through a connecting part (7). The first sleeve (6) has openings at both ends. The inner shell (2) includes an inner shell body (8) and a second sleeve (12) disposed on one side of the inner shell body (8). The second sleeve (12) has openings at both ends. After the inner shell (2) is installed into the outer shell (1), the second sleeve (12) and the first sleeve (6) are connected to form a cavity for accommodating the sleeve (4).

3. The optoelectronic hybrid adapter according to claim 2, characterized in that, The first sleeve (6) has a constricted end at one end away from the connecting part (7) and a straight end at the other end connected to the connecting part (7); the second sleeve (12) has a constricted end at one end away from the inner shell body (8) and a straight end at the other end connected to the inner shell body (8); the diameter of the constricted end is smaller than the diameter of the straight end, and the sleeve (4) is inserted into the corresponding sleeve through the straight end.

4. The optoelectronic hybrid adapter according to claim 2, characterized in that, The bidirectional axial limiting structure includes a stop-fitting structure between the connecting part (7) and the inner shell body (8) and a convex-concave fitting structure. The limiting direction of the stop-fitting structure is the same as the insertion direction of the inner shell (2), and the limiting direction of the convex-concave fitting structure is opposite to the insertion direction of the inner shell (2).

5. The optoelectronic hybrid adapter according to claim 4, characterized in that, The convex-concave mating structure includes a recessed portion (11) and a protruding portion (15) that fit together; the recessed portion (11) is disposed on the inner shell body (8), and the protruding portion (15) is disposed on the inner wall of the outer shell body (1); or, the recessed portion (11) is disposed on the inner wall of the outer shell body (1), and the protruding portion (15) is disposed on the inner shell body (8).

6. The optoelectronic hybrid adapter according to claim 5, characterized in that, The socket at one end of the outer shell (1) is used as the mounting port for installing the inner shell (2). A guide slope (16) is provided on the side of the protrusion (15) facing the mounting port to guide the protruding structure in front of the recess (11) over the protrusion (15) so that the protrusion (15) falls into the recess (11).

7. The optoelectronic hybrid adapter according to claim 1, characterized in that, The inner shell (2) includes an inner shell body (8). A first sleeve (6) and a second sleeve (12) are coaxially arranged on two opposite sides of the inner shell body (8). The first sleeve (6) and the second sleeve (12) are interconnected to form a cavity for accommodating the sleeve (4). The ends of the first sleeve (6) and / or the second sleeve (12) away from the inner shell body (8) are provided with multiple cantilever claws (22) spaced apart in the circumferential direction. The multiple cantilever claws (22) form a constriction with a variable diameter.

8. The optoelectronic hybrid adapter according to claim 7, characterized in that, The bidirectional axial limiting structure includes a groove structure with a convex-concave fit and a protruding structure (25). A left limiting protrusion (23) and a right limiting protrusion (24) are provided axially on the inner wall of the outer shell (1), and the groove structure is formed between the left limiting protrusion (23) and the right limiting protrusion (24); The inner shell body (8) of the inner shell (2) is provided with the protruding structure (25). The inner shell (2) is limited in two axial directions by the protruding structure (25) of the inner shell (2) being inserted into the groove structure.

9. The optoelectronic hybrid adapter according to claim 8, characterized in that, The socket at one end of the outer shell (1) is used as the mounting port for installing the inner shell (2). Among the left limiting protrusion (23) and the right limiting protrusion (24), the side of the limiting protrusion facing the mounting port is provided with a guide slope (16) to guide the protruding structure (25) to pass over the corresponding limiting protrusion.

10. The optoelectronic hybrid adapter according to claim 7, characterized in that, The bidirectional axial limiting structure includes a recessed structure (26) and a protruding structure (25) that fit together; the recessed structure (26) is disposed on the inner wall of the outer shell (1), and the protruding structure (25) is disposed on the inner shell body (8) of the inner shell (2); or, the recessed structure (26) is disposed on the inner shell body (8) of the inner shell (2), and the protruding structure (25) is disposed on the inner wall of the outer shell (1).

11. The optoelectronic hybrid adapter according to claim 1, characterized in that, The lower surface of the outer shell (1) is provided with the strip groove (21), which is a contoured groove that matches the shape of the conductive terminal (3). The installation direction of the conductive terminal (3) is perpendicular to the axis of the optoelectronic hybrid adapter.

12. The optoelectronic hybrid adapter according to claim 1, characterized in that, The lower surface of the outer shell (1) is provided with the strip groove (21), the strip groove (21) extends to one end of the outer shell (1) and opens at the end face, and the installation direction of the conductive terminal (3) is parallel to the axis of the optoelectronic hybrid adapter.

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