MPO adapter

Abstract

The utility model relates to an adapter, in particular to an MPO adapter, which comprises an outer shell I and an outer shell II, the connecting ends of which are mutually butted and fixed, the other ends of the outer shell I and the outer shell II are both plugging ends, an inner shell I is arranged in the outer shell I, an inner shell II is arranged in the outer shell II, the inner shell I is stopped by the outer shell I in the direction towards the plugging ends of the outer shell I, and the inner shell II is arranged in the outer shell II. The outer shell II stops the inner shell II in the direction towards the insertion end of the outer shell II, and the end parts, far away from the insertion end, of the inner shell I and the inner shell II are mutually stopped and matched; the inner wall of the inner shell I and the inner wall of the inner shell II are each provided with a key groove II extending in the insertion direction, the insertion cavities of the inner shell I and the inner shell II form an adapter insertion cavity, and the key grooves II of the inner shell I and the inner shell II are located in the inner walls, opposite to the adapter insertion cavity, of the inner shell I and the inner shell II. The adapter is of a split structure, the inner shell and the outer shell of the split structure can be made of all-metal structures or plastics with higher strength, the adapter is firm and durable, the service life of a product is greatly prolonged, and the environment resistance of the product is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of adapters, specifically to a kind of MPO adapter. BACKGROUND

[0002] The existing MPO adapter is mostly made of plastic structure and processed by mold, which has low mechanical strength and cannot be used for a long time, and is prone to breakage and wear, so it has high risk in space field.

[0003] The existing standard MPO adapter structure is shown in Figures 27 to 29 , which is generally made of one-piece plastic structure. Since the plastic structure is prone to aging, the adapter's spring claws are often deformed during plugging, so the spring claws are usually weak points and prone to excessive wear and breakage, which leads to the failure of the adapter and limits its application in space environment. SUMMARY

[0004] To solve the above technical problems, the utility model provides a kind of MPO adapter, which optimizes the existing MPO adapter and can be applied in space environment.

[0005] The utility model aims to realize the following technical scheme. According to the MPO adapter provided by the utility model, the outer shell body I and the outer shell body II are fixedly connected with each other, the other end of the outer shell body I and the outer shell body II is a plug-in end, the inner shell body I is arranged in the outer shell body I, the inner shell body II is arranged in the outer shell body II, the inner shell body I is blocked by the outer shell body I in the direction of the plug-in end, the inner shell body II is blocked by the outer shell body II in the direction of the plug-in end, and the end of the inner shell body I and the inner shell body II away from the plug-in end is blocked and matched with each other; the inner wall of the inner shell body I and the inner shell body II is provided with a key groove II extending in the plug-in direction, the plug-in cavity of the inner shell body I and the inner shell body II is communicated to form an adapter plug-in cavity, and the key groove II on the inner shell body I and the key groove II on the inner shell body II are respectively arranged on the opposite inner walls of the adapter plug-in cavity.

[0006] Further, the inner wall of the outer shell body I and the outer shell body II is provided with a key groove I extending in the plug-in direction, and the outer wall of the inner shell body I and the inner shell body II is provided with a key matched with the corresponding key groove I.

[0007] Further, the inner wall of the outer shell body I and the outer shell body II is provided with a blocking step, and the outer wall of the inner shell body I and the inner shell body II is provided with a anti-falling step matched with the blocking step.

[0008] Further, the two side walls of the inner shell body I and the inner shell body II are provided with spring claws.

[0009] Further, the connecting end of the outer shell I and the outer shell II is provided with a connecting flange, the connecting flange protrudes from the outer wall of the corresponding outer shell I and the outer shell II, the connecting flange is provided with a mounting hole, and the mounting hole of the outer shell I and the outer shell II is provided with a fixed riveting sleeve to enable the outer shell I and the outer shell II to be fixed to each other.

[0010] Further, the mounting hole is a stepped hole, the hole section close to the connecting end face has a smaller diameter than the hole section far from the connecting end face, the head of the riveting sleeve is provided with a stop boss (301), the mounting hole of the outer shell I is in stop cooperation with the stop boss in the direction towards the corresponding connecting end face, the tail of the riveting sleeve is located in the mounting hole of the outer shell II and is riveted with a shaft sleeve, the mounting hole of the outer shell II is in stop cooperation with the shaft sleeve in the direction towards the corresponding connecting end face, and the inner hole of the shaft sleeve comprises an inclined hole section for avoiding riveting of the riveting sleeve.

[0011] Further, the mounting hole comprises a straight hole section close to the connecting end face and an inclined hole section far from the connecting end face, the diameter of the connecting part of the inclined hole section and the straight hole section is the same as the diameter of the straight hole section, in the direction far from the connecting end face, the diameter of the inclined hole section gradually increases, the head of the riveting sleeve is provided with a stop boss, the mounting hole of the outer shell I is in stop cooperation with the stop boss in the direction towards the corresponding connecting end face, the tail of the riveting sleeve is riveted with the mounting hole of the outer shell II, and the inclined hole section of the mounting hole provides an avoiding space for riveting of the tail of the riveting sleeve.

[0012] Further, the structure size of the outer shell I and the outer shell II is the same, and the structure size of the inner shell I and the inner shell II is the same.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The adapter adopts a split structure, and the inner shell and the outer shell of the split structure can be processed by using full metal structure or plastic with higher strength, and after processing, the split structure can be assembled to meet the requirements of the existing MPO connector adapter, and the split structure is firm and durable.

[0015] The existing MPO adapter is divided into four parts for assembly, and the outer shell and the inner shell are left-right symmetrical, and the two ends of the adapter can be assembled by using the same parts, that is, the inner shell structure and the outer shell structure in the same adapter are the same, and batch processing can be performed during processing, and the processing and assembly are relatively easy.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a first-view perspective perspective of an embodiment of an MPO adapter according to the present invention.

[0018] Figure 2 for Figure 1 A perspective view of the second perspective of the embodiment shown;

[0019] Figure 3 for Figure 1 Cross-sectional view along the insertion direction of the embodiment shown;

[0020] Figure 4 for Figure 1 The front view of the mating end face of the embodiment shown;

[0021] Figure 5 for Figure 1 A front view of another mating end face of the embodiment shown;

[0022] Figure 6 for Figure 3 A first-person perspective 3D schematic diagram of the inner and outer shell;

[0023] Figure 7 for Figure 3 A two-dimensional schematic diagram of the inner and outer shell from a second perspective;

[0024] Figure 8 for Figure 3 A three-dimensional schematic diagram of the inner and outer shell from a third-person perspective;

[0025] Figure 9 for Figure 3 A cross-sectional view of the inner and outer shells along the insertion direction;

[0026] Figure 10 for Figure 3 A front view of the mating end face of the inner and outer shells;

[0027] Figure 11 for Figure 3 A front view of the connection end face between the inner and outer shells;

[0028] Figure 12 for Figure 3 A three-dimensional schematic diagram of the inner shell from a first-person perspective;

[0029] Figure 13 for Figure 3Fig. 6 is a perspective view of the inner housing from a second angle;

[0030] Figure 14 Fig. 7 is a side view of the inner housing; Figure 3

[0031] Figure 15 Fig. 8 is another side view of the inner housing; Figure 3

[0032] Figure 16 Fig. 9 is an elevation view of the inner housing from an end-on perspective; Figure 3

[0033] Figure 17 Fig. 10 is a cross-sectional view of the inner housing at A; Figure 16

[0034] Figure 18 Fig. 11 is a perspective view of the rivet sleeve from a first angle; Figure 3

[0035] Figure 19 Fig. 12 is a perspective view of the rivet sleeve from a second angle; Figure 3

[0036] Figure 20 Fig. 13 is a cross-sectional view of the rivet sleeve along the axis; Figure 3

[0037] Figure 21 Fig. 14 is an elevation view of the rivet sleeve from one side of the head; Figure 3

[0038] Figure 22 Fig. 15 is an elevation view of the rivet sleeve from one side of the tail; Figure 3

[0039] Figure 23 Fig. 16 is a perspective view of the shaft sleeve; Figure 3

[0040] Figure 24 Fig. 17 is a cross-sectional view of the shaft sleeve; Figure 3

[0041] Figure 25 Fig. 18 is an elevation view of the shaft sleeve; Figure 3

[0042] Figure 26 Fig. 19 is a perspective cross-sectional view of an embodiment one of the MPO adapter of the present application;

[0043] Figure 27 Fig. 20 is a cross-sectional view of the prior art MPO adapter;

[0044] Figure 28 Fig. 21 is a cross-sectional view of the prior art MPO adapter from the other side;

[0045] ​​​​​​​​​​​​Figure 29 Front view of the MPO adapter insertion end face perspective in the prior art.

[0046]

Reference Signs

[0047] 1-outer shell I,

[0048] 101-square cavity,

[0049] 102-key groove I,

[0050] 103-connection flange,

[0051] 104-mounting hole,

[0052] 105-stop step,

[0053] 2-inner shell I,

[0054] 201-anti-off step,

[0055] 202-key,

[0056] 203-key groove II,

[0057] 204-spring claw,

[0058] 205-insertion cavity,

[0059] 3-riveting sleeve,

[0060] 301-stop boss,

[0061] 4-shaft sleeve,

[0062] 401-inclined hole section,

[0063] 402-straight hole section,

[0064] 5-outer shell II,

[0065] 6-inner shell II. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. All other embodiments obtained based on the embodiments of the application by those of ordinary skill in the art without creative effort are within the scope of the application.

[0068] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0069] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0070] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0071] In the description of the application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0072] In the present application, unless specifically and explicitly defined otherwise, a first feature is "on" or "under" a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0073] The features and performances of the MPO adapter suitable for one embodiment of the present application are described in further detail below in combination with the embodiments.

[0074] An embodiment one of the MPO adapter of the utility model, as Figures 1 to 26 shown, hereinafter referred to as adapter. The adapter includes two outer housings, two inner housings and two pairs of riveting sleeves 3, shaft sleeves 4. Two outer housings are outer housing I 1 and outer housing II 5 respectively, and two inner housings are inner housing I 2 and inner housing II 6 respectively.

[0075] Two inner housings are respectively inserted and nested in the corresponding outer housings, that is, inner housing I 2 is inserted in outer housing I 1, and inner housing II 6 is inserted in outer housing II 5, then the connecting ends of the two outer housings are butted, and the two outer housings are fixed through the riveting sleeves 3 and the shaft sleeves 4, so as to limit the inner housings in the outer housings, forming the MPO adapter.

[0076] Two inner housings are respectively used for plugging with the corresponding standard MPO plug or standard MPO socket, realizing the adapter plugging of MPO connector.

[0077] In the present embodiment, the structure size of outer housing I 1 is the same as that of outer housing II 5, and the structure size of inner housing I 2 is the same as that of inner housing II 6, which are described by taking outer housing I 1 and inner housing I 2 as examples.

[0078] Outer housing I 1 is provided with a square cavity 101 penetrating through itself along the plugging direction, and one of the inner walls of square cavity 101 is provided with a key groove I 102 extending along the plugging direction.

[0079] The connecting end of the outer shell body 11 is provided with a connecting flange 103, the connecting flange 103 protrudes from the outer wall of the outer shell body 11, the square cavity 101 penetrates through the connecting flange 103, and the connecting flange 103 is provided with a mounting hole 104. After the connecting ends of the two outer shell bodies are butted, a riveting sleeve 3 is sequentially inserted through the mounting holes 104 of the outer shell body 11 and the outer shell body 15, and a shaft sleeve 4 is sleeved and fixed at the tail of the riveting sleeve 3 after the riveting sleeve 3 is inserted through the mounting hole 104, so that the two outer shell bodies are fixed together. In this embodiment, two mounting holes 104 are symmetrically arranged on the connecting flange 103.

[0080] In this embodiment, the mounting hole 104 is a stepped hole, and the diameter of the hole section close to the connecting end face is smaller than the diameter of the hole section away from the connecting end face. The head of the riveting sleeve 3 is provided with a stop boss 301, and after the riveting sleeve 3 is inserted through the mounting hole 104 of the outer shell body 11, the stop boss 301 abuts on the step in the stepped hole. After the tail of the riveting sleeve 3 is inserted through the mounting hole 104 of the outer shell body 15, the shaft sleeve 4 is sleeved, and the shaft sleeve 4 abuts on the step in the mounting hole 104 of the outer shell body 15. By riveting the riveting sleeve 3 and the shaft sleeve 4 with a riveting tool, the connecting flanges 103 of the two outer shell bodies are fixed.

[0081] The riveting sleeve 3 is a hollow structure as a whole, and the shaft sleeve 4 is a circular ring. The inner hole of the shaft sleeve 4 includes two sections, namely, an inclined hole section 401 and a straight hole section 402. The diameter of the connection part between the inclined hole section 401 and the straight hole section 402 is equal to the diameter of the straight hole section 402. The diameter of the inclined hole section 401 gradually increases in the direction from inside to outside, forming a horn hole shape. When the shaft sleeve 4 is sleeved outside the tail of the riveting sleeve 3, the tail end of the riveting sleeve 3 is located in the inclined hole section 401. The tail of the riveting sleeve 3 is expanded using a riveting tool. The inclined hole section 401 provides a space for accommodating the tail of the riveting sleeve 3 and axially stops the riveting sleeve 3, preventing the shaft sleeve 4 from falling off the tail of the riveting sleeve 3, thereby avoiding the riveting sleeve 3 from being separated from the mounting hole 104.

[0082] The inner wall of the connecting end of the outer shell body 11 is provided with a stop step 105, which makes the square cavity 101 form two square cavity sections with different inner diameters. The inner diameter of the square cavity section close to the connecting end face is greater than that of the square cavity section away from the connecting end face.

[0083] The inner shell body 12 is provided with a plug-in cavity 205 penetrating through itself in the plug-in direction, for plugging in the MPO connector. The outer wall of the end portion of the inner shell body 12 away from the plug-in end is provided with an anti-falling step 201. The inner shell body 12 is plug-in nested in the outer shell body 11, and the anti-falling step 201 is stopped on the stop step 105 in the direction towards the plug-in end, avoiding the inner shell body 12 from falling out of the outer shell body 11 towards the plug-in end side.

[0084] After the two inner housings are inserted and nested in the corresponding outer housings, the two outer housings are butted, at this time, the end faces of the two inner housings away from the insertion end abut each other, and the anti-disengagement steps 201 of the two inner housings are nested between the two stop steps 105, so that the inner housings are axially limited in the two outer housings, ensuring that the inner housings do not disengage from the outer housings.

[0085] The outer wall of the inner housing 12 is provided with a key 202 extending in the insertion direction, after the inner housing 12 is nested in the outer housing 11, the key 202 is nested in the key groove 1102 of the outer housing 1. One of the inner walls of the insertion cavity 205 is provided with a key groove 2203, which is used to cooperate with the key on the outer wall of the insertion end of the corresponding MPO connector, so that the MPO connector is inserted and mounted in the inner housing 12 in the correct orientation.

[0086] In this embodiment, in order to make the wall thickness of the inner housing 12 as uniform as possible, the key groove 2203 is located on the inner wall corresponding to the position of the key 202.

[0087] The cooperation of the key groove 1102 and the key 202 plays a guiding role in the insertion and nesting of the inner housing 12 and the outer housing 11, and makes the inner housing 12 be inserted and nested in the outer housing 11 in the correct orientation.

[0088] In the prior art, two MPO connectors connected by an MPO adapter have special requirements for the orientation of the connection. The two outer housings are butted, the square cavities 101 in the two outer housings are connected to form an adapter square cavity, and the key grooves 1102 of the two outer housings are located on the two opposite inner side walls of the adapter square cavity; the two inner housings are butted, the insertion cavities 205 of the inner housings are connected to form an adapter insertion cavity. Since the inner housing is determined in orientation with the outer housing through key groove cooperation, the key grooves 2203 in the two inner housings are located on the two opposite inner walls of the adapter insertion cavity, which is consistent with the existing standard MPO adapter. When the standard MPO plug and MPO socket are connected through the adapter, the keys on the insertion end of the MPO plug and MPO socket cooperate with the corresponding key grooves 2203, so that the MPO plug and MPO socket are correctly connected.

[0089] The size of the insertion end of the inner housing 12 is basically the same as the size of the interface of the existing standard MPO adapter. The insertion end of the inner housing 12 is provided with two elastic claws 204 on both sides. The two elastic claws 204 are arranged in the notches of the two side walls of the insertion end of the inner housing 12 and extend towards the insertion end. The elastic claws 204 can be used to lock the MPO plug and MPO socket on the adapter.

[0090] After the adapter is assembled, since the riveting sleeve 3 is a hollow structure, the adapter can be fixed on the equipment by using the hole of the riveting sleeve 3.

[0091] The assembling process of the embodiment of the utility model is summarized as follows: two inner housings are respectively assembled into the outer housings from the corresponding connecting ends of the outer housings, the anti-disengagement steps 201 of the inner housings are abutted on the stop steps 105 of the outer housings, and the keys 202 are nested in the corresponding key grooves I 102; then the connecting ends of the two outer housings are butted, the orientations of the key grooves I 102 of the two outer housings are relative at this time, then the two outer housings are riveted together through the riveting sleeves 3 and the shaft sleeves 4, at this time, the orientations of the key grooves II 203 of the two inner housings are relative, and the assembling can be completed.

[0092] The utility model has the following characteristics:

[0093] The adapter adopts a split structure, and the inner housing and the outer housing can be processed by using full metal structure or plastic with higher strength, and after processing, the adapter can meet the requirements of the existing MPO connector butt joint, and is firm and durable, compared with the existing injection molded MPO adapter, the adapter pawl wear and broken pawl phenomenon will not appear, the environmental performance is excellent, the inner housing pawl elasticity is excellent, the service life is long, and the product life and environmental performance are greatly improved.

[0094] The outer housing can adopt an MTP shell structure, the MTP shell structure is fixed through the riveting sleeve 3, and the inner housing is fixed through the two MTP shell structures; the two inner housings are fixed after being riveted by the two outer housings, and form an adapter overall structure, the interface size and the realized function of the adapter are completely same as the existing standard MPO adapter, and the standard MPO adapter can be completely replaced.

[0095] The existing MPO adapter is divided into four parts for assembling, and the outer housing and the inner housing are left-right symmetrical, the two ends of the adapter can be assembled by using the same parts, that is, the inner housing structure and the outer housing structure in the same adapter are the same, and batch processing can be carried out during processing, and the processing and assembling are relatively easy.

[0096] In the embodiment two of the utility model, two outer shell bodies are outer shell body I, outer shell body II respectively, two inner shell bodies are inner shell body I, inner shell body II respectively, inner shell body I is inserted in outer shell body I, inner shell body II is inserted in outer shell body II, the structural size of outer shell body I, outer shell body II and the structural size of inner shell body I, inner shell body II can be same, as shown in embodiment one;It can also be needed, adjust the structural size of outer shell body I, outer shell body II and the structural size of corresponding inner shell body I, inner shell body II, as long as guaranteeing that inner shell body I is inserted in outer shell body I, inner shell body II is inserted in outer shell body II and makes the outer shell body butt joint fixed, can the inner shell body is axially limited in outer shell body, and makes the keyway II orientation of two inner shell bodies is opposite, can the shape of the outer contour of inner shell body and the inner contour of corresponding outer shell body can be identified in specific orientation, not limited to the cooperation of keyway I 102 and key 202, avoid the orientation of the keyway II orientation of two inner shell bodies after insertion is same.

[0097] In the embodiment three of the utility model, two outer shell bodies can be fixedly connected through bolt nut, rivet and other modes.

[0098] In the embodiment four of the utility model, the mounting hole on outer shell body can be divided into two sections, the straight hole section close to the connecting end face, the inclined hole section away from the connecting end face, the diameter of the connecting part of inclined hole section and straight hole section is same with the diameter of straight hole section, in the direction away from the connecting end face, the diameter of inclined hole section gradually increases, forms the horn mouth, after the riveting sleeve 3 is sequentially inserted through the mounting hole of two outer shell bodies, the stop boss 301 of riveting sleeve 3 is resisted on the inner wall of the inclined hole section of one mounting hole, and riveting sleeve 3 is riveted through riveting tool, and the tail outer wall of riveting sleeve 3 is riveted on the inner wall of the inclined hole section of another mounting hole.

[0099] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An MPO adapter, characterized in that: The device includes an outer shell I (1) and an outer shell II (5) with their connecting ends fixed together. The other ends of the outer shell I (1) and the outer shell II (5) are both mating ends. An inner shell I (2) is provided inside the outer shell I (1), and an inner shell II (6) is provided inside the outer shell II (5). The outer shell I (1) blocks the inner shell I (2) in the direction toward its mating end, and the outer shell II (5) blocks the inner shell II (6) in the direction toward its mating end. The ends of the inner shell I (2) and the inner shell II (6) that are away from the mating end block each other. The inner walls of the inner shell I (2) and the inner shell II (6) are provided with keyways II (203) that extend in the mating direction. The mating cavities (205) of the inner shell I (2) and the inner shell II (6) are connected to form the mating cavity of the adapter. The keyways II (203) on the inner shell I (2) and the keyways II (203) on the inner shell II (6) are respectively located on the opposite inner walls of the mating cavity of the adapter.

2. An MPO adapter according to claim 1, characterized in that: The inner walls of the outer shell I (1) and the outer shell II (5) are provided with keyways I (102) extending along the mating direction, and the outer walls of the inner shell I (2) and the inner shell II (6) are provided with keys (202) that mate with the corresponding keyways I (102).

3. An MPO adapter according to claim 1, characterized in that: The inner walls of the outer shell I (1) and the outer shell II (5) are provided with a stop step (105), and the outer walls of the inner shell I (2) and the inner shell II (6) are provided with an anti-detachment step (201) that cooperates with the stop step (105).

4. An MPO adapter according to claim 1, characterized in that: Both sides of the inner shell I (2) and the inner shell II (6) are provided with spring claws (204).

5. An MPO adapter according to claim 1, characterized in that: The connecting ends of the outer shell I (1) and the outer shell II (5) are provided with connecting flanges (103). The connecting flanges (103) protrude from the outer walls of the corresponding outer shell I (1) and the outer shell II (5). The connecting flanges (103) are provided with mounting holes (104). The mounting holes (104) of the outer shell I (1) and the outer shell II (5) are fitted with fixing rivet sleeves (3) so that the outer shell I (1) and the outer shell II (5) are connected and fixed to each other.

6. An MPO adapter according to claim 5, characterized in that: The mounting hole (104) is a stepped hole. The diameter of the hole section of the mounting hole (104) near the connecting end face is smaller than the diameter of the hole section away from the connecting end face. The head of the riveting sleeve (3) is provided with a stop boss (301). The mounting hole (104) of the outer shell I (1) is in a stop-fitting engagement with the stop boss (301) in the direction facing the corresponding connecting end face. The tail of the riveting sleeve (3) is located in the mounting hole (104) of the outer shell II (5) and is riveted to the bushing (4). The mounting hole (104) of the outer shell II (5) is in a stop-fitting engagement with the bushing (4) in the direction facing the corresponding connecting end face. The inner hole of the bushing (4) includes an oblique hole section (401) for avoiding the riveting of the riveting sleeve (3).

7. An MPO adapter according to claim 5, characterized in that: The mounting hole (104) includes a straight hole section near the connecting end face and an oblique hole section away from the connecting end face. The diameter of the part connecting the oblique hole section and the straight hole section is the same as the diameter of the straight hole section. In the direction away from the connecting end face, the diameter of the oblique hole section gradually increases. The head of the riveting sleeve (3) is provided with a stop boss (301). The mounting hole (104) of the outer shell I (1) is stopped and engaged with the stop boss (301) in the direction facing the corresponding connecting end face. The tail of the riveting sleeve (3) is riveted to the mounting hole (104) of the outer shell II (5). The oblique hole section (401) of the mounting hole (104) provides clearance space for the riveting of the tail of the riveting sleeve (3).

8. An MPO adapter according to claim 1, characterized in that: The outer shell I (1) and outer shell II (5) have the same structural dimensions, and the inner shell I (2) and inner shell II (6) have the same structural dimensions.

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