Connector assembly and connector plug and plug-sealed fiber optic cable assembly thereof

Abstract

The application discloses a connector assembly and a connector plug and a plug sealing optical cable assembly thereof, and relates to the technical field of optical cable connectors. The connector assembly comprises a distribution sleeve and a tail plug rubber ring. The distribution sleeve is provided with a through cavity I in the direction of a central axis. The cavity I is used for accommodating and fixing an optical cable inside. The rear end of the distribution sleeve penetrates into the inner hole of the tail plug rubber ring. A rubber ring matching surface is formed on the outer side wall of the rear end of the distribution sleeve. The rubber ring matching surface is used for sealingly matching with the inner hole of the tail plug rubber ring. The device has the advantages that the sealing structure of the connection position is not easily deformed by environmental influences, and has better sealing effect, by improving the structure, setting the distribution sleeve with a specific structure, and matching the inner and outer structures of the distribution sleeve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of connector, and particularly relates to a connector assembly, a connector plug and a plug-sealed optical cable assembly. BACKGROUND

[0002] At present, most outdoor waterproof optical cable assemblies need to face a problem: how to effectively seal the optical cable. Taking a bayonet connector as an example, its sealing scheme is shown in the figure: Figure 1 After insertion, the plug rubber ring 101 and the socket rubber pad 106 realize the sealing between the plug 110 and the socket 120, the plug rubber ring 102 and the plug rubber ring 103 realize the sealing between the plug shell 109 and the plug sleeve 108, the plug rubber ring 103 is used to seal the adapter optical cable 107, and the fixed sleeve 104 is sleeved on the optical cable 107 to realize the axial stop limiting. The existing scheme has high requirements for the optical cable, and has the following defects: first, when the optical cable outer skin material is relatively soft, the rubber ring is compressed for a long time, causing permanent deformation of the outer skin, the optical cable becomes thinner and thinner, and finally loses the sealing effect. Second, the optical cable outer skin material is easily affected by the environment and deformed, the outer skin shrinks, the outer diameter becomes smaller, and the sealing fails. Third, when the optical cable outer diameter size changes greatly, the rubber ring inner hole is too large, which may not cover the size tolerance of the optical cable, resulting in sealing failure; the rubber ring inner hole is too small, which may not be successfully assembled. SUMMARY

[0003] The purpose of the present application is to at least solve one of the problems existing in the prior art, provide a connector assembly, a connector plug and a plug-sealed optical cable assembly. The device improves the structure, sets a specific structure of the distribution sleeve, and cooperates the inner and outer structures of the distribution sleeve, so that the sealing structure at the connection is not easily deformed by the environment, and has the advantages of better sealing effect.

[0004] One of the purposes of the present application is to provide a plug-sealed optical cable assembly, which comprises a distribution sleeve and a tail plug rubber ring, the distribution sleeve is formed with a through cavity I along the center axis direction, the cavity I is used for accommodating and fixing the optical cable inside, the rear end of the distribution sleeve penetrates into the inner hole of the tail plug rubber ring, and a rubber ring matching surface is formed on the outer side wall of the rear end of the distribution sleeve, which is used for sealing cooperation with the inner hole of the tail plug rubber ring.

[0005] As a preferred scheme, the distribution sleeve comprises a front end for the extension of the optical cable and a tail end for the insertion of the optical cable, the outer side wall of the front end of the distribution sleeve is formed with a sleeve matching surface, and the sleeve matching surface is used for adapting to the inner wall of the cavity III of the sleeve of the connector plug.

[0006] As a preferred solution, a sealing ring is further included, which is arranged in the cavity I, an installation groove is formed on the inner wall of the cavity I around the central axis, the sealing ring is arranged in the installation groove, the inner hole of the sealing ring is used for penetrating the optical cable, and the inner hole diameter of the sealing ring is matched with the outer diameter of the optical cable.

[0007] As a preferred solution, a limiting fixing sleeve is further included, which is used for being fixed on the outer skin of the optical cable, an inner circumferential step is formed on the inner wall of the cavity I, and one end of the limiting fixing sleeve can be in contact with the inner circumferential step, so as to form a stop limiting for the optical cable along the first axial direction.

[0008] As a preferred solution, a glue filling area is arranged in the cavity I, the optical cable extending end of the front end of the distribution sleeve is a glue filling port, and the glue filling area is filled with a sealing glue, so as to fill and seal the peripheral space of the optical cable in the cavity I.

[0009] As a preferred solution, an inner circumferential step is formed on the inner wall of the cavity I, the inner circumferential step divides the cavity I into a large-diameter cavity and a small-diameter cavity, and the large-diameter cavity is used for injecting the sealing glue into the glue filling area in the cavity I.

[0010] As a preferred solution, an annular protrusion is circumferentially arranged on the inner wall of the large-diameter cavity, and an annular sealing groove is formed between the annular protrusion and the inner circumferential step.

[0011] Or, at least two annular protrusions are circumferentially arranged on the inner wall of the large-diameter cavity, an annular sealing groove is formed between the two adjacent annular protrusions, and an annular sealing groove is formed between the inner circumferential step and the annular protrusion adjacent to the inner circumferential step.

[0012] As a preferred solution, the inner circumferential step is arranged at the port close to the front section of the cavity I, and the glue filling area includes an inner area of the large-diameter cavity and a small-diameter cavity area connected with the large-diameter cavity.

[0013] Or, the inner circumferential step is located inside the cavity I, and the glue filling area includes an inner area of the large-diameter cavity.

[0014] As a preferred solution, at least two inner circumferential steps are arranged, the inner circumferential steps divide the cavity I into multiple cavity sections with different inner diameters along the central axis direction, and the multiple cavity sections with different inner diameters gradually decrease in the inner diameter from the front end to the rear end of the cavity I.

[0015] The second purpose of the application is to provide a connector plug, which comprises the plug sealing optical cable assembly of any one of the above, further comprising a sleeve and an outer shell, the sleeve is located in the cavity II of the outer shell, and the tail plug rubber ring is arranged between the sleeve and the tail hole of the outer shell.

[0016] As a preferred solution, the sleeve fitting surface of the branch sleeve is formed with a position adjusting groove in the axial direction, the corresponding position of the sleeve fitting surface and the sleeve side wall is formed with a side wall opening, a elastic arm is arranged in the side wall opening, the length direction of the elastic arm is arranged in the axial direction of the sleeve, the fixed end of the elastic arm is connected to the side wall opening, and the free end of the elastic arm is provided with a limiting clamp head matched with the position adjusting groove, and the limiting clamp head is used to realize the position adjustment and fixation of the branch sleeve in the cavity III in the axial direction.

[0017] The third object of the present application is to provide a connector assembly, characterized in that it comprises a connector plug according to any one of the preceding aspects and a connector socket matched with the connector plug.

[0018] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0019] Firstly, the branch sleeve with a specific structure is matched with the tail plug rubber ring through structural improvement, the branch sleeve is sleeved on the outside of the sheath part of the optical cable through the cooperation of the inner and outer structures of the branch sleeve, and then the rubber ring fitting surface of the branch sleeve is matched with the external plug rubber ring, so that the plug rubber ring is prevented from directly extruding the optical cable sheath, and the optical cable sheath is prevented from becoming thin after being extruded.

[0020] Secondly, the mounting groove is formed on the inner side wall of the cavity of the optical cable insertion end, and the sealing ring is arranged in the mounting groove, the sealing connection is realized through the cooperation of the sealing ring and the optical cable sheath of the branch sleeve, the gap between the inner wall of the branch sleeve cavity and the optical cable sheath is filled, and the sealing of the branch sleeve cavity is realized.

[0021] Thirdly, the present application considers that the sealing ring still has a certain compression deformation effect on the optical cable sheath, and therefore the sealing glue is injected into the cavity of the branch sleeve, the fixed connection between the optical cable and the connector assembly is realized through the action of the sealing glue, and the better sealing effect of the optical cable sheath and the inner wall of the cavity is realized.

[0022] Fourthly, the present application considers that in order to further improve the sealing effect between the inner side wall of the cavity of the branch sleeve and the sealing glue after the sealing glue is solidified and formed, the annular protrusion and the annular groove are arranged in the cavity of the branch sleeve, so that the labyrinth sealing structure is formed through the cooperation sealing of the annular protrusion and the annular groove, and the sealing effect between the sealing glue and the inner side wall of the cavity is further improved.

[0023] Fifth, this solution further considers reducing the processing difficulty of the internal structure of the splitter sleeve cavity by setting the internal structure of the splitter sleeve cavity as an open stepped structure. By setting the stepped structure, after the sealing colloid solidifies and forms, it can further reduce the processing difficulty of the component while ensuring that the sealing effect of the inner wall of the outer splitter sleeve cavity meets the requirements.

[0024] Sixth, in order to ensure that the wire divider sleeve can be adjusted along the axial direction and easily fixed inside the sleeve, a side wall opening is formed on the inner side wall of the outer sleeve, and a spring arm is provided in the side wall opening. One end of the spring arm is fixedly connected to or integrally set with the main body of the outer sleeve, and the other end forms a limit clamp, which is engaged in the positioning groove at the predetermined position by the limit clamp. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a diagram showing the internal structure of a connector assembly in the relevant prior art;

[0027] Figure 2 This is a cross-sectional view of the connector plug in Embodiment 1 of the present invention;

[0028] Figure 3 This is a cross-sectional view of the optical cable sealing assembly in Example 2;

[0029] Figure 4 This is a cross-sectional view of the optical cable sealing assembly in Example 3;

[0030] Figure 5 This is a cross-sectional view of one embodiment of the inner circumferential step of the optical cable sealing assembly in Example 3;

[0031] Figure 6 This is a cross-sectional view of another embodiment of the inner circumferential step of the optical cable sealing assembly in Example 4;

[0032] Figure 7 This is a diagram showing the internal structure of the connector plug in Example 3;

[0033] Figure 8 This is the optical cable end crimping deformation structure in Embodiment 2 of the present invention;

[0034] Figure 9 for Figure 8 A cross-sectional view of the fiber optic cable end crimping deformation structure.

[0035] Figure 10 This is a perspective view of the connector plug of the present invention with the outer shell removed;

[0036] Figure 11 This is a cross-sectional view of the position adjustment structure between the dividing sleeve and the outer sleeve of the present invention;

[0037] Markings in the diagram: 1. Divider sleeve; 11. Cavity I; 111. Annular protrusion; 112. Annular sealing groove; 113. Glue filling area; 12. Large diameter end; 121. Sleeve mating surface; 122. Position adjustment groove; 13. Small diameter end; 131. Rubber ring mating surface; 14. Mounting groove; 15. Inner circumferential step; 16. Large diameter cavity; 17. Small diameter cavity; 18. Sealing colloid; 19. Outer circumferential step; 2. Tail plug rubber ring; 3. Sealing ring; 4. Limiting and fixing sleeve. 5. Connector assembly; 51. LC connector; 52. Connector housing; 53. Fixing sleeve; 6. Intermediate sleeve rubber ring; 7. Head plug rubber ring; 8. Sleeve; 81. Cavity III; 82. Spring arm; 83. Limiting clip; 84. Side wall opening; 86. Outer wall groove I; 87. Outer wall groove II; 9. Outer housing; 91. Cavity II; 100. Optical cable; 1001. Crimping deformation head; 1002. Optical cable inner core; 200. Connector plug; 300. Connector socket;

[0038] 101. Plug rubber ring one; 102. Plug rubber ring two; 103. Plug rubber ring three; 104. Fixing sleeve; 107. Adapter fiber optic cable; 108. Plug sleeve; 109. Plug outer shell; 110. Plug; 120. Socket. Detailed Implementation

[0039] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0040] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0041] Example 1

[0042] As shown in the figure, this embodiment provides a connector plug sealed optical cable assembly, including a splitter sleeve 1. The splitter sleeve 1 is a rotating structure with a through cavity I11 along the central axis of the splitter sleeve 1. The optical cable 100 is inserted into the cavity I11 from the rear end (the end away from the insertion end of the connector plug 200) and fixed inside it. A rubber ring mating surface 131 is formed on the outer side wall of the rear end of the splitter sleeve 1, which is sealed to the rubber ring 2 of the tail plug of the connector plug 200. This solution achieves the mating of the optical cable 100 and the connector plug 200 through the splitter sleeve 1 by inserting the optical cable 100 into the cavity I11 of the splitter sleeve 1. This effectively solves the problem of poor sealing caused by the deformation of the optical cable 100 due to the direct squeezing contact between the rubber ring 2 of the tail plug and the outer sheath of the optical cable. Therefore, this solution can improve the sealing performance of the connection between the optical cable 100 and the rear end of the connector plug 200 to a certain extent by fitting a splitter sleeve 1 with a specific structure that mates with the rubber ring 2 of the tail plug on the outside of the optical cable 100.

[0043] In a typical embodiment of this solution, considering further optimization of the design of the connector sleeve 1 and the external structure, the connector sleeve 1 has a large-diameter end 12 located at the front end of the connector sleeve 1 and a small-diameter end 13 located at the rear end of the connector sleeve 1, wherein the diameter of the cross-section of the large-diameter end 12 is larger than the diameter of the cross-section of the small-diameter end 13. The purpose of this arrangement is that the sleeve mating surface 121 on the outer side of the large-diameter end 12 can be adapted to the inner diameter of the cavity Ⅲ81 of the sleeve 8 of the connector plug 200, while the rubber ring mating surface 131 on the outer side of the small-diameter end 13 is used to adapt and seal with the inner hole of the rubber ring 2 of the tail plug. An outer circumferential step 19 is formed on the outside of the connection between the large-diameter end 12 and the small-diameter end 13. The sleeve mating surface 121 and the rubber ring mating surface 131 are respectively located on both sides of the outer circumferential step 19 along the axial direction. The tail plug rubber ring 2 is fitted on the rubber ring mating surface 131 of the small-diameter end 13 of the connector sleeve 1 to achieve a seal on the outer side of the connector sleeve 1.

[0044] In this design, an inner circumferential step 15 is formed around the inner wall of cavity I11. The two sides of the inner circumferential step 15 are divided into a large-diameter cavity 16 at the front end of the splitter sleeve 1 and a small-diameter cavity 17 at the rear end of the splitter sleeve 1. The large-diameter cavity 16 and the small-diameter cavity 17 are cylindrical receiving spaces with different inner diameters, with the inner diameter of the large-diameter cavity 16 being larger than that of the small-diameter cavity 17. In this design, when the optical cable 100 is inserted into the cavity I11 of the splitter sleeve 1 along direction A, it is necessary to prevent the optical cable 100 from shifting in the opposite direction to the axial direction A of the arrow. Figure 2The direction of the arrow is along the axial direction A, and the direction pointed to by the arrow is the front end of the connector plug 200. This effectively protects the connection between the optical cable 100 and the LC connector 51. Specifically, it prevents the optical cable 100 from moving too much in the opposite direction of the axial direction A, which would cause pulling damage to the optical cable connection of the LC connector 51. Therefore, a limiting and fixing sleeve 4 is fitted on the outer sheath of the optical cable. The limiting and fixing sleeve 4 is located in the large-diameter cavity 16 and makes contact with the inner circumferential step 15. It is used to stop and limit the limiting and fixing sleeve 4 and the optical cable 100 along the axial direction. Through the stopping and limiting function of the limiting and fixing sleeve 4, the connection between the optical cable 100 and the LC connector 51 can be protected.

[0045] This solution also requires further consideration of the sealing method for the interior of cavity I11 of the splitter sleeve 1. Specifically, the following sealing structure can be adopted: at least one annular mounting groove 14 is formed on the inner wall of cavity I11. The purpose of the annular mounting groove 14 is to install an O-ring seal 3. The O-ring seal 3 is placed inside cavity I11, and its inner hole is used to fit the outer sheath of the optical cable 100, thereby completing the gap sealing between the optical cable sheath and the splitter sleeve 11. The optical cable portion with the outer sheath extends out of the small-diameter cavity 17 and enters the large-diameter cavity 16. An upper limit fixing sleeve 4 is fitted on the outer sheath of the optical cable entering the large-diameter cavity 16. The upper limit fixing sleeve 4 cooperates with the inner circumferential step 15, thereby forming a stop and restriction on the movement of the optical cable 100 in the axial direction B, preventing excessive external force on the optical cable 100 and avoiding damage to the connection of the connector assembly.

[0046] In the optical cable sealing assembly described above, the interior of the cavity I11 of the splitter sleeve 1 is sealed by the inner wall of the cavity I11 and the O-ring 3. The exterior of the cavity I11 of the splitter sleeve 1 is sealed by the rubber ring 2 of the tail plug and the rubber ring mating surface 131 of the splitter sleeve 1. The material of the splitter sleeve 1 in this solution can be made of plastic materials such as glass fiber reinforced nylon or glass fiber reinforced PBT. Since the material of the splitter sleeve 1 is harder than that of the optical cable 100, the splitter sleeve 1 is not easily deformed and is not easily affected by the environment. The O-ring 3 and the optical cable 100 cooperate to solve the sealing problem inside the cavity I11 of the splitter sleeve 1.

[0047] This embodiment also provides a connector plug, including the above-mentioned optical cable sealing assembly, sleeve 8 and outer shell 9. The outer shell 9 has a cavity II 91 formed along the axial direction. The sleeve 8 is fixedly installed in the cavity II 91. A tail plug rubber ring 2 is provided between the tail end of the sleeve 8 and the tail end of the outer shell 9. One end of the tail plug rubber ring 2 is fastened in the fixing groove at the tail end of the sleeve 8, and the other end contacts the outer shell 9. The plug optical cable sealing assembly passes through the tail hole of the sleeve 8, the inner hole of the tail plug rubber ring 2 and the tail hole of the outer shell 9 in sequence.

[0048] Specifically, the small-diameter end of the splitter sleeve 1 passes through the tail hole of the sleeve 8 and the tail plug rubber ring 2 in sequence and extends into the tail hole of the outer shell 9. The end of the optical cable 100 extends into the rear end port of the cavity I11 of the small-diameter end and extends out from the front end port, and is connected to the LC connector assembly 5. The LC connector assembly 5 includes an LC connector 51, a connecting shell 52 and a fixing sleeve 53 in sequence from the front end to the rear end. The LC connector 51, the connecting shell 52 and the fixing sleeve 53 are fixedly connected in sequence. The front end of the optical cable 100 passes through the inside of the fixing sleeve 53 and the connecting shell 52 and is connected to the LC connector 51.

[0049] In this embodiment, the large-diameter end 12 of the wire divider sleeve 1 is located inside the cavity III 81 of the sleeve 8. A position adjustment groove 19 is formed on the outer circumferential surface of the large-diameter end 12 of the wire divider sleeve 1. Several position adjustment grooves 19 are arranged along the axial direction of the wire divider sleeve 1. A side wall opening 84 is formed on the side wall of the sleeve 8. A spring arm 82 is fixedly installed inside the side wall opening 84. The length direction of the spring arm 82 is generally arranged along the axial direction of the sleeve 8. The fixed end of the spring arm 82 is connected to the inner side of the side wall opening 84, and the free end of the spring arm 82 is fixed. A limiting head 83 is provided. By cooperating with the position adjustment groove 19, the position of the wire divider sleeve 1 inside the sleeve 8 can be adjusted and fixed along the axial direction. When the wire divider sleeve 1 is fixed inside the sleeve 8, if the position of the wire divider sleeve 1 needs to be adjusted, the limiting head 83 can cooperate with different position adjustment grooves 19 to achieve adjustment along the axial direction of the sleeve 8. When the position adjustment is completed, the limiting head 83 is engaged in the position adjustment groove 19 to achieve the positioning and fixation of the wire divider sleeve 1.

[0050] In this design, an intermediate plug rubber ring 6 is provided on the outer side of the middle section of the sleeve 8. The intermediate plug rubber ring 6 is fitted into the groove Ⅰ86 on the outer wall of the sleeve 8. The intermediate plug rubber ring 6 cooperates with the cavity Ⅱ91 of the outer shell 9 to achieve a seal between the assembly gap of the sleeve 8 and the outer shell 9. At the insertion end of the connector plug 200, a head plug rubber ring 7 is fitted on the insertion end of the sleeve 8. The head plug rubber ring 7 is fitted into the groove Ⅱ87 on the outer wall of the sleeve 8. The head plug rubber ring 7 is used for sealing cooperation when the connector plug 200 and the connector socket 300 are mated and inserted.

[0051] This embodiment also provides a connector assembly, including the connector plug 200 described above and a connector socket 300 adapted to the connector plug 200. A socket rubber ring 301 is provided in the groove outside the insertion end of the connector socket 300. When the connector plug 200 and the connector socket 300 are adapted to be inserted, the end of the outer shell 9 of the connector plug 200 abuts and presses against the socket rubber ring 301 to achieve a seal at the connection between the plug and the socket.

[0052] Example 2

[0053] As shown in the figure, this embodiment provides a connector plug sealed optical cable assembly, including a splitter sleeve 1. The splitter sleeve 1 is a rotating structure with a through cavity I11 along the central axis of the splitter sleeve 1. The optical cable 100 is inserted into and fixed inside the cavity I11 from the rear end (the end away from the insertion end of the connector plug 200). A rubber ring mating surface is formed on the outer side wall of the rear end of the splitter sleeve 1 to seal with the tail plug rubber ring 2 of the connector plug 200. This solution achieves the mating of the optical cable 100 and the connector plug 200 through the splitter sleeve 1 by inserting the optical cable 100 into the cavity I11 of the splitter sleeve 1. This effectively solves the problem of poor sealing caused by the deformation of the optical cable 100 due to the direct squeezing contact between the tail plug rubber ring 2 and the outer sheath of the optical cable. Therefore, this solution can improve the sealing performance at the connection between the optical cable 100 and the rear end of the connector plug 200 to a certain extent by fitting a splitter sleeve 1 with a specific structure that mates with the tail plug rubber ring 2 on the outside of the optical cable 100.

[0054] In this design, the splitter sleeve 1 has a large-diameter end 12 and a small-diameter end 13 arranged opposite to each other. The diameter of the cross-section of the large-diameter end 12 is larger than that of the cross-section of the small-diameter end 13. The purpose of this arrangement is that the outer wall surface of the large-diameter end 12 can be adapted to the inner diameter of the cavity Ⅲ81 of the sleeve 8 of the connector plug 200, while the outer wall surface of the small-diameter end 13 is used to adapt and seal with the inner hole of the tail plug rubber ring 2. An outer circumferential step 19 is formed at the connection between the large-diameter end 12 and the small-diameter end 13. The tail plug rubber ring 2 is fitted onto the small-diameter end 13 of the splitter sleeve 1 to achieve an outer seal of the splitter sleeve 1.

[0055] In this scheme, an inner circumferential step 15 can also be formed inside the connection between the large diameter end 12 and the small diameter end 13. The axial front and rear sides of the inner circumferential step 15 are divided into a large diameter cavity 16 and a small diameter cavity 17. The large diameter cavity 16 and the small diameter cavity 17 are cylindrical receiving spaces with different inner diameters. The inner diameter of the large diameter cavity 16 is larger than the inner diameter of the small diameter cavity 17.

[0056] In this embodiment, after the optical cable 100 extends into the cavity I11 and connects to the LC connector assembly 5, the LC connector assembly 5 includes, from front to rear, an LC connector 51, a connecting shell 52, and a fixing sleeve 53. The LC connector 51, connecting shell 52, and fixing sleeve 53 are sequentially fixedly connected. The head end of the optical cable 100 passes through the fixing sleeve 53 and the connecting shell 52, ultimately achieving the connection between the optical cable core 1002 and the LC connector 51. By filling the cavity I11 near the large-diameter cavity 16 with a sealing colloid 18, the gap between the optical cable 100 and the inner wall of the cavity I11 is sealed. The front end portion of the optical cable 100 with the optical cable sheath and the tail end portion of the fixing sleeve 53 are both placed within the filled sealing colloid 18.

[0057] To further improve the sealing effect between the inner wall of cavity I11 and the sealing colloid 11, an annular sealing groove 112 is formed on the inner wall of the large-diameter cavity 16 of cavity I11. The annular sealing groove 112 can be set as one or more as needed. When the annular sealing groove 112 is set as one, the annular sealing groove 112 is located between the annular protrusion 111 and the inner circumferential step 15. The annular protrusion 111 is a step set on the inner wall of cavity I11 around the central axis of cavity I11. As needed, multiple annular sealing grooves 112 can be provided. Multiple annular sealing grooves 112 are arranged along the central axis of cavity I11. The annular sealing grooves 112 are located between two annular protrusions 111 or between annular protrusions 111 and inner circumferential steps 15. Annular protrusions 111 are steps set on the inner sidewall of cavity I11 around the central axis of cavity I11, and multiple ones are arranged along the central axis of cavity I11. The number of annular protrusions 111 and annular sealing grooves 112 is the same, which can further improve the sealing performance of the device.

[0058] This solution, through the setting of the annular sealing groove 112 and the annular protrusion 111, can effectively improve the sealing performance between the splitter sleeve 1 and the optical cable 100. In this embodiment, it is considered that the axial position of the optical cable 100 within the splitter sleeve 1 needs to be limited before adhesive application. The outer sheath of the optical cable is crimped using the jaws of a crimping pliers, causing plastic deformation of the outer sheath. The plastically deformed end acts as a stop for the optical cable 100 to move axially towards the rear end. After the outer sheath undergoes plastic deformation, the splitter sleeve 1 is pushed towards the deformed portion until they contact each other. That is, the edge of the plastic deformation exceeds the inner diameter of the small-diameter cavity 17, thus providing a stopping function. Then, adhesive is applied to the large-diameter cavity 16. Epoxy adhesive is used here, as it has good flowability and is less prone to air bubbles. In other embodiments, this solution can also use a limiting sleeve crimped onto the front end of the optical cable sheath, thereby similarly providing a stopping and limiting function to prevent the optical cable 100 from moving axially towards the rear end.

[0059] This solution also provides a connector plug, including the aforementioned optical cable sealing assembly, sleeve 8, and outer shell 9. The outer shell 9 has a cavity II 91 formed along the axial direction. The sleeve 8 is fixedly installed in the cavity II 91. A tail plug rubber ring 2 is provided between the tail end of the sleeve 8 and the tail end of the outer shell 9. One end of the tail plug rubber ring 2 is fastened in the fixing groove at the tail end of the sleeve 8, and the other end contacts the outer shell 9. The optical cable sealing assembly passes sequentially through the tail hole of the sleeve 8, the inner hole of the tail plug rubber ring 2, and the tail hole of the outer shell 9. In this embodiment, the small-diameter end of the splitter sleeve 1 passes sequentially through the tail hole of the sleeve 8 and the tail plug rubber ring 2 and extends into the tail hole of the outer shell 9, while the end of the optical cable 100 extends into the rear end port of the cavity II 91 and extends out from the front end port to connect with the LC connector assembly 5.

[0060] In this embodiment, the large-diameter end of the wire divider sleeve 1 is located inside the cavity Ⅲ81 of the sleeve 8. A position adjustment groove 19 is formed on the outer circumferential surface of the large-diameter end 12 of the wire divider sleeve 1. Several position adjustment grooves 19 are arranged along the axial direction of the wire divider sleeve 1. A side wall opening 84 is formed on the side wall of the sleeve 8. A spring arm 82 is fixedly arranged inside the side wall opening. The fixed end of the spring arm 82 is connected to the main body of the sleeve 8. A limit lock head 83 is fixedly arranged on the free end of the spring arm 82. By cooperating with the position adjustment groove 19, the position adjustment and fixation of the wire divider sleeve 1 along the axial direction inside the sleeve 8 can be realized. When the wire divider sleeve 1 is fixed inside the sleeve 8, when the position of the wire divider sleeve 1 needs to be adjusted, the limit lock head 83 can cooperate with different position adjustment grooves 19 to realize the adjustment along the axial direction of the sleeve 8. When the position adjustment is completed, the limit lock head 83 is inserted into the position adjustment groove 19 to realize the position positioning and fixation of the wire divider sleeve 1.

[0061] In this design, an intermediate plug rubber ring 6 is provided on the outer side of the middle section of the sleeve 8. The intermediate plug rubber ring 6 is fitted into the groove Ⅰ86 on the outer wall of the sleeve 8. The intermediate plug rubber ring 6 cooperates with the cavity Ⅱ91 of the outer shell 9 to achieve a seal between the assembly gap of the sleeve 8 and the outer shell 9. At the insertion end of the connector plug 200, a head plug rubber ring 7 is fitted on the insertion end of the sleeve 8. The head plug rubber ring 7 is fitted into the groove Ⅱ87 on the outer wall of the sleeve 8. The head plug rubber ring 7 is used for sealing cooperation when the connector plug 200 and the connector socket 300 are mated and inserted.

[0062] This embodiment also provides a connector assembly, including the aforementioned connector plug 200 and a connector socket 300 adapted to the connector plug 200. A socket rubber ring 301 is provided in the external groove of the insertion end of the connector socket 300. When the connector plug 200 and the connector socket 300 are inserted, the outer shell end of the connector plug 200 presses against the socket rubber ring 301 to achieve a seal at the plug-socket connection. It should be noted that the connector socket 300 forms a insertion arm (not shown in the figure) along the insertion direction, and the insertion end of the sleeve 8 of the connector plug 200 forms an insertion groove 85 that mates with the insertion arm. When the plug and socket are mated, the insertion arm and the corresponding socket are in the insertion groove 85, which can prevent relative torsion after the connector plug 200 and the connector socket 300 are inserted, thereby effectively protecting the internal core components.

[0063] Example 3

[0064] The difference between Example 3 and Example 2 lies only in the structure of the plug-sealed optical cable assembly: an inner circumferential step 15 is provided inside cavity I11, and the inner circumferential step 15 is provided at any location along the inner wall of the large-diameter cavity 16. In the first embodiment, when the inner circumferential step 15 is provided at the front end of the large-diameter cavity 16, when adding adhesive, since the direction of adhesive injection is as follows... Figure 5 In the vertical direction shown, the inner circumferential step 15 is located at the outermost end of the large-diameter cavity 16 when the adhesive is being poured in, allowing for easy visual observation of whether the adhesive has completed its sealing function; in the second embodiment, the inner circumferential step 15 is located at the bottom of the large-diameter cavity 16, by... Figure 6 As can be seen, this structure is essentially equivalent to reserving a glue-filling gap between the crimping deformation head 1001 of the optical cable 100 and the inner wall of the large-diameter cavity 16. This also has a good sealing function, but compared with the first embodiment, this structure is not conducive to visually observing the sealing of the glue. The third embodiment is to set the inner circumferential step 15 between the inner circumferential step 15 of the first embodiment and the inner circumferential step 15 of the third embodiment. The fourth embodiment is that the inner circumferential step 15 divides the cavity I11 into multiple cavity segments with different inner diameters along the central axis, and the inner diameter of the multiple cavity segments with different inner diameters gradually decreases from the optical cable extension end to the optical cable insertion end of the cavity I11. The fourth embodiment specifically includes two or more inner circumferential steps 15. When using two inner circumferential steps 15, one can be positioned at the front end of the large-diameter cavity 16, and the other at the bottom, thus achieving a double-step seal. Alternatively, several more inner circumferential steps 15 can be added between the two inner circumferential steps 15. All these methods achieve a better sealing effect through the cooperation of the sealing adhesive with the step corners of the inner wall of the large-diameter cavity 16. The purpose of this arrangement is that the processing difficulty of this structure is lower than that of the embodiment 2 described above.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A plug-sealed optical cable assembly, characterized in that: The device includes a splitter sleeve and a tail plug rubber ring. The splitter sleeve has a through cavity I along the central axis. The cavity I is used to accommodate the optical cable and fix it inside. The rear end of the splitter sleeve passes through the inner hole of the tail plug rubber ring, and a rubber ring mating surface is formed on the outer side wall of the rear end of the splitter sleeve. The rubber ring mating surface is used to seal and fit with the inner hole of the tail plug rubber ring. The cavity I is provided with a sealing structure; the sealing structure includes a sealing ring and / or a sealing colloid. The sealing ring is an O-ring, which is located inside the cavity I. An installation groove is formed around the central axis on the inner wall of the cavity I. The sealing ring is placed in the installation groove. The inner hole of the sealing ring is used to pass through the optical cable, and the inner diameter of the sealing ring is adapted to the outer diameter of the optical cable. The cavity I is provided with a potting and filling area, and the optical cable extension port at the front end of the splitter sleeve is the potting port. The potting and filling area is filled with sealing glue to fill and seal the space around the optical cable in the cavity I. The inner wall of the cavity I is formed with an inner circumferential step, which divides the cavity I into a large-diameter cavity and a small-diameter cavity. The large-diameter cavity is used to fill the potting and filling area in the cavity I with sealing glue. By filling cavity I near the large-diameter cavity with sealing colloid, the gap between the optical cable and the inner wall of cavity I is sealed; the front end of the optical cable with the outer sheath and the tail end of the connector assembly's fixing sleeve are both placed in the filled sealing colloid. The cavity I is also provided with a limiting and fixing sleeve or a crimping deformation head is formed at the end of the optical cable sheath; the limiting and fixing sleeve is used to fix it on the optical cable sheath, and an inner circumferential step is formed on the inner wall of the cavity I. One end of the limiting and fixing sleeve can contact the inner circumferential step to form a stop and limit the optical cable along the first axial direction; or the outer edge of the crimping deformation head extends beyond the inner diameter of the small-diameter cavity to form a stop function.

2. The plug-sealed optical cable assembly according to claim 1, characterized in that: The splitter sleeve includes a front end for extending the optical cable and a tail end for inserting the optical cable. The outer side wall of the front end of the splitter sleeve forms a sleeve mating surface, which is adapted to fit the inner wall of the cavity III of the connector plug's sleeve.

3. The plug-sealed optical cable assembly according to claim 1, characterized in that: The inner wall of the large-diameter cavity is provided with an annular protrusion in the circumferential direction; the gap between the annular protrusion and the inner circumferential step forms an annular sealing groove. Alternatively; the inner wall of the large-diameter cavity is provided with at least two annular protrusions in the circumferential direction, and the gap between the two connected annular protrusions forms an annular sealing groove; and the gap between the inner circumferential step and the adjacent annular protrusion forms an annular sealing groove.

4. A plug-sealed optical cable assembly according to claim 1, characterized in that: The inner circumferential step is located at the port near the front end of cavity I, and the glue filling area includes the large-diameter cavity area and the small-diameter cavity area connected to the large-diameter cavity. Alternatively, the inner circumferential step may be located inside cavity I, and the glue filling area may include the large-diameter cavity region.

5. A plug-sealed optical cable assembly according to claim 1, characterized in that: The inner circumferential steps are provided in at least two ways. The inner circumferential steps divide the cavity I into multiple cavity segments with different inner diameters along the central axis. The inner diameter of the multiple cavity segments with different inner diameters gradually decreases from the front end to the rear end of the cavity I.

6. A connector plug, characterized in that: A plug-sealed optical cable assembly including any one of claims 1-5, further comprising a sleeve and an outer shell, wherein the sleeve is located within cavity II of the outer shell, and a tail plug rubber ring is disposed between the sleeve and the tail hole of the outer shell.

7. A connector plug according to claim 6, characterized in that: The sleeve mating surface of the dividing sleeve has a position adjustment groove formed along the axial direction. The corresponding position of the sleeve sidewall and the sleeve mating surface has a sidewall opening. A spring arm is provided in the sidewall opening. The length direction of the spring arm is set along the axial direction of the sleeve. The fixed end of the spring arm is connected to the sidewall opening. The free end of the spring arm is provided with a limiting clip that mates with the position adjustment groove. The limiting clip is used to realize the position adjustment and fixation of the dividing sleeve along the axial direction in the cavity III.

8. A connector assembly, characterized in that, Includes a connector plug as described in claim 6 or 7 and a connector socket that mates with the connector plug.

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