Connector assembly and connector plug thereof, and plug sealing optical cable assembly

Abstract

A connector assembly and a connector plug thereof (200), and a plug sealing optical cable assembly. The plug sealing optical cable assembly comprises a branching sleeve (1) and a tail plug rubber ring (2); a through cavity I (11) is formed in the branching sleeve (1) along the central axis; the cavity I (11) is used for containing an optical cable (100) and fixing same inside; the rear end of the branching sleeve (1) penetrates into an inner hole of the tail plug rubber ring (2); and a rubber ring mating surface (131) is formed on the outer side wall of the rear end of the branching sleeve (1), wherein the rubber ring mating surface (131) is used for sealingly mating to the inner hole of the tail plug rubber ring (2). By means of the provision of the branching sleeve (1) of a specific structure and the mating of the inner and outer structures of the branching sleeve (1), the sealing structure at the joint is not easily deformed under the influence of the environment, and has the advantage of a better sealing effect.

Description

Connector assembly and connector plug and plug-sealed optical cable assembly thereof TECHNICAL FIELD

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

[0002] Currently, 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, a sealing scheme thereof is shown in Fig. 1: after being inserted, plug rubber ring one 101 and socket rubber pad 106 realize sealing between plug 110 and socket 120, plug rubber ring two 102 and plug rubber ring three 103 realize sealing between plug outer shell 109 and plug sleeve 108, plug rubber ring three 103 is used to seal adapter optical cable 107, and fixed sleeve 104 sleeved on optical cable 107 is used to realize axial stop and limit. The existing scheme has relatively high requirements for the optical cable, and has the following defects: first, when the material of the outer skin of the optical cable is relatively soft, the outer skin is permanently deformed due to long-term compression of the rubber ring, the optical cable becomes thinner and thinner, and finally the sealing effect is lost. Second, the outer skin of the optical cable is easily deformed due to environmental influence, the outer skin shrinks, the outer diameter becomes smaller, and the sealing is invalid. Third, when the size of the outer diameter of the optical cable changes greatly, the inner hole of the rubber ring is too large, which may not cover the size tolerance of the optical cable, resulting in sealing failure; the inner hole of the rubber ring 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, and to provide a connector assembly, a connector plug and a plug-sealed optical cable assembly thereof. 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 due to environmental influence, 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 central axis direction, the cavity I is used to accommodate and fix 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, the rubber ring matching surface is used to seal and cooperate 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 to adapt 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 fixing 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, a gap between the annular protrusion and the inner circumferential step forms an annular sealing groove, or at least two annular protrusions are circumferentially arranged on the inner wall of the large-diameter cavity, a gap between the two adjacent annular protrusions forms an annular sealing groove, and a gap between the inner circumferential step and the annular protrusion adjacent to the inner circumferential step forms an annular sealing groove.

[0011] As a preferred solution, the inner circumferential step is arranged at the port close to the front section of the cavity I, 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, 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.

[0012] 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.

[0013] The second object of the present 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.

[0014] 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.

[0015] 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.

[0016] Compared with the prior art, the present application has at least one of the following beneficial effects: first, 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 outer skin 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 outer skin, thereby preventing the optical cable outer skin from becoming thin after being extruded.

[0017] Second, 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 outer skin of the branch sleeve, the gap between the inner wall of the branch sleeve cavity and the optical cable outer skin is filled, and the sealing of the branch sleeve cavity is realized. At the same time, the limiting fixing sleeve is crimped at the outer skin end of the optical cable, and the limiting fixing sleeve is used to form a stop limit for the optical cable along the axial direction of the branch sleeve, prevent the optical cable from moving along the axial direction of the branch sleeve to the tail end, and prevent the optical cable from being damaged at the connection with the LC connector.

[0018] Third, the present application considers that the use of the sealing ring still has a certain compression deformation effect on the optical cable outer skin, and therefore a sealing glue body is injected into the cavity of the branch sleeve, and the fixed connection between the optical cable and the connector assembly is realized through the action of the sealing glue body, and the sealing effect between the optical cable outer skin and the inner wall of the cavity is better.

[0019] Fourth, 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 body after solidification and molding, an annular protrusion and an annular groove are arranged in the cavity of the branch sleeve, so that the annular protrusion and the annular groove are matched and sealed, a labyrinth sealing structure is formed, and the sealing effect between the sealing glue body and the inner side wall of the cavity is further improved.

[0020] Further, in order to reduce the processing difficulty of the internal structure of the cavity of the distribution sleeve, the internal structure of the cavity of the distribution sleeve is arranged as an open step structure. After the sealing glue is solidified and formed, the processing difficulty of the component is further reduced on the basis of guaranteeing that the sealing effect of the outer distribution sleeve cavity meets the requirements.

[0021] Sixth, in order to guarantee that the distribution sleeve can be adjusted in the axial direction inside the sleeve and be conveniently fixed, a side wall opening is formed on the inner side wall of the outer sleeve, and a spring arm is arranged in the side wall opening. One end of the spring arm is fixedly connected or integrally arranged with the main body of the outer sleeve, and the other end forms a limiting clamp head which is clamped in a positioning groove at a predetermined position. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 is an internal structure diagram of a connector assembly in the related art; Figure 2 is a sectional view of a connector plug in Embodiment 1 of the present application; Figure 3 is a sectional view of an optical cable sealing assembly in Embodiment 2; Figure 4 is a sectional view of an optical cable sealing assembly in Embodiment 3; Figure 5 is a sectional view of an inner circumferential step of the optical cable sealing assembly in Embodiment 3; Figure 6 is a sectional view of another embodiment of an inner circumferential step of the optical cable sealing assembly in Embodiment 4; Figure 7 is an internal structure diagram of a connector plug in Embodiment 3; Figure 8 is an optical cable end crimping deformation structure in Embodiment 2 of the present application; Figure 9 is a sectional view of the optical cable end crimping deformation structure in Figure 8; Figure 10 is a perspective view of a connector plug without an outer shell in the present application; Figure 11 is a sectional view of a position adjusting structure of a distribution sleeve and an outer sleeve; Marked in the figures: 1, distribution 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 adjusting 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 glue, 19, outer circumferential step, 2, tail plug rubber ring, 3, sealing ring, 4, limiting fixing sleeve, 5, connector assembly, 51, LC connector, 52, connecting shell, 53, fixing sleeve, 6, middle sleeve rubber ring, 7, head plug rubber ring, 8, sleeve, 81, cavity III, 82, elastic arm, 83, limiting chuck, 84, side wall opening, 86, outer wall groove I, 87, outer wall groove II, 9, outer shell, 91, cavity II, 100, optical cable, 1001, crimping deformation head, 1002, optical cable inner core, 200, connector plug, 300, connector socket; 101, plug rubber ring 1, 102, plug rubber ring 2, 103, plug rubber ring 3, 104, fixing sleeve, 107, adaptive optical cable, 108, plug sleeve, 109, plug outer shell, 110, plug, 120, socket. DETAILED DESCRIPTION

[0024] The present application will now be described in detail by way of example only with reference to the drawings. It should be understood that certain embodiments described herein can be combined with one another in ways not specifically stated in the following description.

[0025] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs. The "one", "a" or "the" and similar words used in the patent application description and claims of the present application do not represent quantity limitation, but indicate the existence of at least one. The "including" or "containing" and similar words indicate that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, but do not exclude other elements or objects with the same function.

[0026] As shown in the figure, the present embodiment provides a connector plug sealing optical cable assembly, which comprises a distribution sleeve 1, the distribution sleeve 1 is a rotary body structure, a through cavity Ⅰ11 is formed along the central axis direction of the distribution sleeve 1, the optical cable 100 is inserted into the cavity Ⅰ11 from the rear end (referring to the end away from the connector plug 200) and fixed inside, the outer side wall of the rear end of the distribution sleeve 1 is formed with a rubber ring matching surface 131 matched with the tail plug rubber ring 2 of the connector plug 200, the present scheme inserts the optical cable 100 into the cavity Ⅰ11 of the distribution sleeve 1, so as to realize the cooperation of the optical cable 100 and the connector plug 200 through the distribution sleeve 1, effectively solving the problem of poor sealing caused by the direct extrusion contact of the tail plug rubber ring 2 and the optical cable outer skin, so that the optical cable 100 is deformed, therefore, the present scheme can improve the sealing performance of the connection between the optical cable 100 and the rear end of the connector plug 200 by sleeving the distribution sleeve 1 with specific structure matched with the tail plug rubber ring 2 outside the optical cable 100.

[0027] In a typical embodiment of the present scheme, in order to further optimize the cooperation design of the distribution sleeve 1 and the external structure, the distribution sleeve 1 has a large diameter end 12 located at the front end of the distribution sleeve 1 and a small diameter end 13 located at the rear end of the distribution sleeve 1, which are oppositely arranged, wherein the cross-sectional diameter of the large diameter end 12 is larger than that of the small diameter end 13, the purpose of such arrangement is that the sleeve matching surface 121 on the outer side of the large diameter end 12 can be matched with the inner diameter of the cavity Ⅲ81 of the sleeve 8 of the connector plug 200, and the rubber ring matching surface 131 on the outer side of the small diameter end 13 is used to match and seal with the inner hole of the tail plug rubber ring 2, an outer circumferential step 19 is formed outside the connection between the large diameter end 12 and the small diameter end 13, the sleeve matching surface 121 and the rubber ring matching surface 131 are respectively located on the two sides of the outer circumferential step 19 along the axial direction, and the tail plug rubber ring 2 sleeved on the rubber ring matching surface 131 of the small diameter end 13 of the distribution sleeve 1 can realize the sealing of the outer side of the distribution sleeve 1.

[0028] The inner circumferential step 15 is formed on the inner wall of the cavity Ⅰ11. The two sides of the inner circumferential step 15 are divided into a large-diameter cavity 16 located at the front end of the distribution sleeve 1 and a small-diameter cavity 17 located at the rear end of the distribution sleeve 1. The large-diameter cavity 16 and the small-diameter cavity 17 are cylindrical accommodation spaces with different inner diameters. The inner diameter of the large-diameter cavity 16 is larger than that of the small-diameter cavity 17. When the optical cable 100 enters the cavity Ⅰ11 of the distribution sleeve 1 along the direction A, it is necessary to prevent the optical cable 100 from moving in the opposite direction of the arrow axial direction A (the arrow direction in FIG. 2 is along the axial direction A, and the direction indicated by the arrow is the front end of the connector plug 200), thereby effectively protecting the connection between the optical cable 100 and the LC connector 51. Specifically, it prevents the optical cable connection of the LC connector 51 from being damaged by excessive movement of the optical cable 100 in the opposite direction of the arrow axial direction A. Therefore, a limiting fixing sleeve 4 is provided on the outer skin of the optical cable. The limiting fixing sleeve 4 is located in the large-diameter cavity 16 and contacts the inner circumferential step 15, thereby achieving axial stop limiting of the limiting fixing sleeve 4 and the optical cable 100. Through the stop limiting action of the limiting fixing sleeve 4, the connection between the optical cable 100 and the LC connector 51 is protected.

[0029] The present scheme also needs to further consider the sealing method of the cavity Ⅰ11 inside the distribution sleeve 1. Specifically, the following sealing structure can be used: at least one annular mounting groove 14 is formed on the inner wall of the cavity Ⅰ11. The purpose of arranging the annular mounting groove 14 is to install the O-shaped sealing ring 3. The O-shaped sealing ring 3 is arranged inside the cavity Ⅰ11. The inner hole of the O-shaped sealing ring 3 is used to match the outer skin of the optical cable 100, thereby completing the gap sealing between the optical cable outer skin and the distribution sleeve 11. The part of the optical cable with the outer skin extends out of the small-diameter cavity 17 and enters the inside of the large-diameter cavity 16. The limiting fixing sleeve 4 is provided on the optical cable outer skin entering the large-diameter cavity 16. The limiting fixing sleeve 4 cooperates with the inner circumferential step 15, thereby achieving the stop limiting of the optical cable 100 moving in the axial direction B, preventing the optical cable 100 from being subjected to excessive external force, and avoiding damage to the connection of the connector assembly.

[0030] The optical cable sealing assembly has the following structure. The inside of the cavity Ⅰ11 of the distribution sleeve 1 is sealed once by the cooperation of the inner wall of the cavity Ⅰ11 of the distribution sleeve 1 and the O-shaped ring 3. The outside of the cavity Ⅰ11 of the distribution sleeve 1 is sealed twice by the cooperation of the tail plug rubber ring 2 and the rubber ring cooperation surface 131 of the distribution sleeve 1. The material of the distribution sleeve 1 can be glass fiber reinforced nylon or glass fiber reinforced PBT plastic material. Since the material of the distribution sleeve 1 is harder than that of the optical cable 100, the distribution sleeve 1 is not easy to deform and is not easily affected by the environment. The O-shaped sealing ring 3 cooperates with the optical cable 100 to solve the internal sealing problem of the cavity Ⅰ11 of the distribution sleeve 1.

[0031] The embodiment also provides a connector plug, which comprises the optical cable sealing assembly, the sleeve 8 and the outer shell 9, the outer shell 9 is formed with a cavity II 91 along the axial direction; the sleeve 8 is fixedly installed in the cavity II 91, and the tail end of the sleeve 8 and the tail end of the outer shell 9 are provided with a tail plug rubber ring 2, one end of the tail plug rubber ring 2 is buckled in the fixed groove of the tail end of the sleeve 8, the other end is in contact with the outer shell 9, and the plug optical cable sealing assembly sequentially 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.

[0032] Specifically, the small-diameter end of the distribution sleeve 1 sequentially passes through the tail hole of the sleeve 8, the tail plug rubber ring 2 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 I 11 of the small-diameter end and extends out of the front end port, and is connected with the LC connector assembly 5, the LC connector assembly 5 sequentially comprises an LC connector 51, a connecting shell 52 and a fixed sleeve 53 from the front end to the rear end, the LC connector 51, the connecting shell 52 and the fixed sleeve 53 are sequentially fixedly connected, the front end of the optical cable 100 passes through the inside of the fixed sleeve 53 and the connecting shell 52 and is connected with the LC connector 51.

[0033] In the embodiment, the large-diameter end 12 of the distribution sleeve 1 is located in the cavity III 81 of the sleeve 8, the position adjusting groove 19 is formed on the outer peripheral surface of the large-diameter end 12 of the distribution sleeve 1, a plurality of position adjusting grooves 19 are arranged along the axial direction of the distribution sleeve 1, the side wall opening 84 is formed on the side wall of the sleeve 8, the elastic arm 82 is fixedly arranged in the inside of the side wall opening 84, the length direction of the elastic arm 82 is arranged along the axial direction of the sleeve 8 as a whole, the fixed end of the elastic arm 82 is connected with the inside edge of the side wall opening 84, the free end of the elastic arm 82 is fixedly arranged with the limiting clamp head 83, the limiting clamp head 83 cooperates with the position adjusting groove 19, so that the position of the distribution sleeve 1 in the inside of the sleeve 8 along the axial direction is adjusted and fixed, when the distribution sleeve 1 is fixed in the sleeve 8, if the position of the distribution sleeve 1 needs to be adjusted, the limiting clamp head 83 cooperates with different position adjusting grooves 19, so that the adjustment along the axial direction of the sleeve 8 is realized, when the position adjustment is completed, the limiting clamp head 83 is buckled in the position adjusting groove 19, so that the position of the distribution sleeve 1 is fixed.

[0034] In the scheme, the intermediate plug rubber ring 6 is arranged on the outside of the middle section of the sleeve 8, the intermediate plug rubber ring 6 is sleeved in the outer wall groove I 86 of the sleeve 8, the intermediate plug rubber ring 6 cooperates with the cavity II 91 of the outer shell 9, so that the sealing of the assembly gap between the sleeve 8 and the outer shell 9 is realized, the head plug rubber ring 7 is sleeved on the plug-in end of the sleeve 8 at the plug-in end of the connector plug 200, the head plug rubber ring 7 is sleeved in the outer wall groove II 87 of the sleeve 8, and the head plug rubber ring 7 is used for sealing cooperation when the connector plug 200 and the connector socket 300 are adaptively plugged in.

[0035] The embodiment also provides a connector assembly, which comprises the connector plug 200 and the connector socket 300 matched with the connector plug 200, and the socket rubber ring 301 is arranged in the external groove of the plug end of the connector socket 300, and the outer shell 9 of the connector plug 200 is pressed against the socket rubber ring 301 to realize the sealing of the plug-socket connection when the connector plug 200 and the connector socket 300 are matched and plugged.

[0036] As shown in the figure, the embodiment provides a connector plug sealing optical cable assembly, which comprises a distribution sleeve 1, the distribution sleeve 1 is a rotary body structure, a through cavity Ⅰ 11 is arranged along the central axis direction of the distribution sleeve 1, the optical cable 100 is inserted into the cavity Ⅰ 11 from the rear end (the end away from the plug end of the connector plug 200) of the cavity Ⅰ 11 and is fixed inside, and a rubber ring matching surface matched with the tail plug rubber ring 2 of the connector plug 200 is formed on the outer side wall of the rear end of the distribution sleeve 1, the optical cable 100 is matched with the connector plug 200 through the distribution sleeve 1 by inserting the optical cable 100 into the cavity Ⅰ 11 of the distribution sleeve 1, and the problem of poor sealing caused by the deformation of the optical cable 100 due to the direct extrusion contact of the tail plug rubber ring 2 with the optical cable outer skin is effectively solved, so that the sealing performance of the connection between the optical cable 100 and the rear end of the connector plug 200 is improved to a certain extent.

[0037] In the scheme, the distribution sleeve 1 has a large-diameter end 12 and a small-diameter end 13 arranged oppositely, 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, and the purpose of such arrangement is that the outer side wall surface of the large-diameter end 12 can be matched with the inner diameter of the cavity Ⅲ 81 of the sleeve 8 of the connector plug 200, and the outer side wall surface of the small-diameter end 13 is used for matching and sealing with the inner hole of the tail plug rubber ring 2, an outer circumferential step 19 is formed between the large-diameter end 12 and the small-diameter end 13, and the tail plug rubber ring 2 is sleeved on the small-diameter end 13 of the distribution sleeve 1 to realize the sealing of the outer side of the distribution sleeve 1.

[0038] In the 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 front and rear positions of the inner circumferential step 15 in the axial direction 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 accommodation spaces with different inner diameters, and the inner diameter of the large-diameter cavity 16 is larger than the inner diameter of the small-diameter cavity 17.

[0039] In this embodiment, after the optical cable 100 extends into the cavity I 11 and is connected with the LC connector assembly 5, the LC connector assembly 5 includes, from front to back, an LC connector 51, a connecting shell 52, and a fixing sleeve 53, the LC connector 51, the connecting shell 52, and the fixing sleeve 53 are fixedly connected in sequence, the head end of the optical cable 100 passes through the fixing sleeve 53 and the connecting shell 52, and finally the inner core 1002 of the optical cable is connected with the LC connector 51. The cavity I 11 on the side close to the large-diameter cavity 16 is filled with sealant 18, thereby sealing the gap between the optical cable 100 and the inner wall of the cavity I 11. The front end part of the optical cable outer skin and the tail end part of the fixing sleeve 53 are both placed in the filled sealant 18.

[0040] In order to further improve the sealing effect between the inner wall of the cavity I 11 and the sealant 11, an annular sealing groove 112 is formed on the inner wall of the large-diameter cavity 16 side of the cavity I 11. The annular sealing groove 112 can be provided as one or more as needed. When the annular sealing groove 112 is provided 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 provided on the inner wall of the cavity I 11 around the central axis of the cavity I 11. The annular sealing groove 112 can also be provided as multiple as needed. The multiple annular sealing grooves 112 are arranged along the central axis direction of the cavity I 11. The annular sealing groove 112 is located between two annular protrusions 111 or between the annular protrusion 111 and the inner circumferential step 15. The annular protrusion 111 is a step provided on the inner wall of the cavity I 11 around the central axis of the cavity I 11, and multiple annular protrusions 111 are arranged along the central axis direction of the cavity I 11. The number of annular protrusions 111 is consistent with the number of annular sealing grooves 112, which can further improve the sealing performance of the device.

[0041] The present scheme can effectively improve the sealing between the distribution sleeve 1 and the optical cable 100 by providing the annular sealing groove 112 and the annular protrusion 111. In this embodiment, the axial position of the optical cable 100 in the distribution sleeve 1 needs to be limited before the glue is poured. The jaws of the crimping pliers are used to crimp the optical cable outer skin, so that part of the optical cable outer skin plastically deforms. The deformed end has a stop function for preventing the optical cable 100 from moving axially towards the rear end. After the part of the optical cable outer skin plastically deforms, the distribution sleeve 1 is pushed towards the deformed part until they contact, that is, the edge of the deformed part exceeds the inner diameter of the small-diameter cavity 17, so it has a stop function. Then, the large-diameter cavity 16 is filled with glue. The glue used here is epoxy glue, which has good fluidity and is not prone to air bubbles. In other embodiments, the present scheme can also use a crimping limiting sleeve at the front end part of the optical cable outer skin, so that the optical cable 100 also has a stop limiting function for preventing it from moving axially towards the rear end.

[0042] The scheme also provides a connector plug, comprising the optical cable sealing assembly, the sleeve 8 and the outer shell 9, the outer shell 9 is formed with a cavity II 91 along the axial direction; the sleeve 8 is fixedly installed in the cavity II 91, the tail end of the sleeve 8 and the tail end of the outer shell 9 are provided with a tail plug rubber ring 2, one end of the tail plug rubber ring 2 is buckled in the fixed groove of the tail end of the sleeve 8, the other end is in contact with the outer shell 9, and the optical cable sealing assembly sequentially 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 the embodiment, the small-diameter end of the distribution sleeve 1 sequentially passes through the tail hole of the sleeve 8, the tail plug rubber ring 2 and extends into the tail hole of the outer shell 9, and the end of the optical cable 100 extends into the rear end port of the cavity I 11 and extends out of the front end port and is connected with the LC connector assembly 5.

[0043] In the embodiment, the large-diameter end of the distribution sleeve 1 is located in the cavity III 81 of the sleeve 8, the position adjusting groove 19 is formed on the outer circumferential surface of the large-diameter end 12 of the distribution sleeve 1, a plurality of position adjusting grooves 19 are arranged along the axial direction of the distribution sleeve 1, the side wall opening 84 is formed on the side wall of the sleeve 8, the elastic arm 82 is fixedly arranged in the side wall opening, the fixed end of the elastic arm 82 is connected with the main body of the sleeve 8, the free end of the elastic arm 82 is fixedly provided with the limiting clamp 83, the limiting clamp 83 cooperates with the position adjusting groove 19, so that the position of the distribution sleeve 1 in the sleeve 8 is adjusted and fixed along the axial direction. When the distribution sleeve 1 is fixed in the sleeve 8, the position of the distribution sleeve 1 needs to be adjusted, the limiting clamp 83 cooperates with different position adjusting grooves 19, so that the adjustment along the axial direction of the sleeve 8 is realized, when the position adjustment is completed, the limiting clamp 83 is clamped in the position adjusting groove 19, and the position of the distribution sleeve 1 is positioned and fixed.

[0044] In the scheme, the intermediate plug rubber ring 6 is arranged outside the middle segment of the sleeve 8, the intermediate plug rubber ring 6 is sleeved in the outer wall groove I 86 of the sleeve 8, the intermediate plug rubber ring 6 cooperates with the cavity II 91 of the outer shell 9, so that the assembly gap between the sleeve 8 and the outer shell 9 is sealed, the head plug rubber ring 7 is sleeved on the plug-in end of the sleeve 8 at the plug-in end of the connector plug 200, the head plug rubber ring 7 is sleeved in the outer wall groove II 87 of the sleeve 8, and the head plug rubber ring 7 is used for sealing cooperation when the connector plug 200 and the connector socket 300 are adaptively plugged.

[0045] The embodiment also provides a connector assembly, which comprises the connector plug 200 and the connector socket 300 matched with the connector plug 200, and the socket rubber ring 301 is arranged in the external groove of the plug end of the connector socket 300, and the housing end of the connector plug 200 is pressed against the socket rubber ring 301 to realize the sealing of the plug-socket connection when the connector plug 200 and the connector socket 300 are matched and plugged. It should be noted that the connector socket 300 forms a plug arm (not shown in the figure) along the plug direction, and the plug end of the sleeve 8 of the connector plug 200 is formed with a plug groove 85 matched with the plug arm, and when the plug and socket are connected, the plug arm is matched in the plug groove 85, which can prevent the relative rotation of the connector plug 200 and the connector socket 300 after being plugged, thereby effectively protecting the internal core.

[0046] The embodiment 3 is different from the embodiment 2 only in the structure of the plug-sealing optical cable assembly: the inner circumferential step 15 is arranged in the cavity I 11, and the inner circumferential step 15 is arranged at any position of the inner wall of the large-diameter cavity 16. The first implementation is that the inner circumferential step 15 is arranged at the front end port of the large-diameter cavity 16, and when the glue is filled, the filling direction is the vertical direction as shown in FIG. 5, and at this time, the inner circumferential step 15 is located at the most end port position of the large-diameter cavity 16 when the glue is filled, and the sealing function of the glue can be conveniently observed by the naked eye; the second implementation is that the inner circumferential step 15 is located at the bottom of the large-diameter cavity 16, and as can be seen from FIG. 6, this structure actually reserves 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, and this case also has good sealing function, but compared with the first implementation, this structure is not conducive to observing the sealing condition of the glue by the naked eye; the third implementation is that the inner circumferential step 15 is arranged between the inner circumferential step 15 of the first implementation and the inner circumferential step 15 of the third implementation. The fourth implementation is that the inner circumferential step 15 divides the cavity I 11 into multiple cavity segments with different inner diameters along the central axis direction, and the inner diameters of the multiple cavity segments gradually decrease from the optical cable extension end to the optical cable insertion end of the cavity I 11. The fourth implementation specifically provides two or more inner circumferential steps 15, and when two inner circumferential steps 15 are arranged, one inner circumferential step 15 can be arranged at the front end port of the large-diameter cavity 16, and the other inner circumferential step 15 is located at the bottom of the large-diameter cavity 16, thereby realizing double-step sealing. Of course, on the basis of the above-mentioned manner, a plurality of inner circumferential steps 15 can be additionally arranged between the two inner circumferential steps 15. The above-mentioned manners all have better sealing effect through the cooperation of the sealing glue and the step corner of the inner wall of the large-diameter cavity 16. The purpose of such arrangement is that the processing difficulty of this structure is lower than that of the above-mentioned implementation of the embodiment 2.

[0047] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, shall still fall within the scope of the technical solution of the present application.

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.

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: It also includes a sealing ring, which is disposed 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 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.

4. A plug-sealed optical cable assembly according to claim 3, characterized in that: It also includes a limiting and fixing sleeve, which is used to fix the optical cable sheath. The inner wall of the cavity I has an inner circumferential step, and one end of the limiting and fixing sleeve can contact the inner circumferential step to stop and limit the optical cable along the first axial direction.

5. A plug-sealed optical cable assembly according to any one of claims 1, 2, or 4, characterized in that: The cavity I is provided with a glue filling area, and the optical cable extension port at the front end of the splitter sleeve is the glue filling port. The glue filling area is filled with sealing glue to fill and seal the space around the optical cable in the cavity I.

6. A plug-sealed optical cable assembly according to claim 5, characterized in that: The inner wall of cavity I has an inner circumferential step, which divides cavity I into a large-diameter cavity and a small-diameter cavity. The large-diameter cavity is used to inject sealing adhesive into the glue filling area inside cavity I.

7. A plug-sealed optical cable assembly according to claim 6, 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.

8. A plug-sealed optical cable assembly according to claim 6, 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.

9. A plug-sealed optical cable assembly according to claim 5, 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.

10. A connector plug, characterized in that: A plug-sealed optical cable assembly including any one of claims 1-9 further includes 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.

11. A connector plug according to claim 10, 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.

12. A connector assembly, characterized in that, Includes a connector plug as described in claim 10 or 11 and a connector socket that mates with the connector plug.

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