Plug

Abstract

The utility model relates to a plug which comprises an outer shell, an inner shell and a tail pipe. An inner cavity is defined by the shell in the circumferential direction. The inner shell is provided with a first shell end and a second shell end which are opposite in the insertion direction, and the inner shell is contained in the inner cavity at least through the second shell end. The tail pipe is provided with a first pipe opening and a second pipe opening which are opposite in the inserting direction, and the tail pipe is contained in the inner cavity at least through the first pipe opening. The first pipe opening and the second shell end are oppositely arranged. A sealing piece is arranged on the periphery of at least one of the inner shell and the tail pipe in a positioning and sleeving mode. The sealing piece arranged on the periphery of the inner shell in a sleeving mode abuts against the first pipe opening in the circumferential direction, or the sealing piece arranged on the periphery of the tail pipe in a sleeving mode abuts against the second shell end of the inner shell in the circumferential direction, or the sealing piece arranged on the periphery of the inner shell in a sleeving mode abuts against the sealing piece arranged on the periphery of the tail pipe in a sleeving mode in the circumferential direction. When the inner shell or the tail pipe is taken out of the inner cavity, the inner shell or the tail pipe can drive the sealing piece to retreat from the inner cavity. The sealing element can provide a stable sealing effect during abutting fit. And when the plug is disassembled, the sealing element does not need to be taken out independently.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connection devices, and particularly to a plug. Background Art

[0002] A plug can be used in cooperation with a socket to achieve electrical docking between different devices, and its application can improve the operation efficiency of electrical docking between different devices. Currently, it has been widely used in fields such as automobiles, communications, consumer electronics, data processing, and industrial machinery.

[0003] Some plugs include a housing. In addition, the ports of two components of the plug are docked oppositely within the housing. To ensure the sealing performance at the port docking, traditional techniques generally set a sealing ring between two opposite ports. The sealing ring is pressed by the edge of the port, thereby preventing liquid from entering the component along the gap between the two components. However, since the sealing ring needs to be installed inside the housing and the space inside the housing is limited, during the assembly of the plug, it is generally necessary to use fingers or tweezers to place the sealing ring into the housing. When the sealing ring is placed inside the housing, it is also necessary to press the sealing ring flat. Otherwise, the sealing ring may not fit fully with the edge of the port due to deformation, resulting in insufficient sealing performance. When disassembling the plug, after the component is taken out of the housing, it is necessary to separately take out the sealing ring additionally, resulting in more complicated disassembly of the plug. Summary of the Utility Model

[0004] Based on this, the present utility model provides a plug that can solve or at least alleviate the above technical problems.

[0005] The present utility model provides a plug, comprising:

[0006] A housing that defines an inner cavity along the circumferential direction;

[0007] An inner housing having opposite first and second housing ends along the insertion direction, and at least the second housing end of the inner housing is received in the inner cavity;

[0008] A tail pipe having opposite first and second pipe ends along the insertion direction, and at least the first pipe end of the tail pipe is received in the inner cavity; the first pipe end is disposed opposite to the second housing end; a sealing member is peripherally positioned and sleeved on at least one of the inner housing and the tail pipe; the sealing member sleeved on the outer periphery of the inner housing abuts against the first pipe end along the circumferential direction, or the sealing member sleeved on the outer periphery of the tail pipe abuts against the second housing end of the inner housing along the circumferential direction, or the sealing member sleeved on the outer periphery of the inner housing abuts against the sealing member sleeved on the outer periphery of the tail pipe along the circumferential direction.

[0009] In the above-mentioned plug, the second shell end of the inner shell and the first pipe opening of the tail tube are connected in the inner cavity, and the inner shell and the tail tube together define an internal space along the circumferential direction, and the internal space is used to accommodate an insulator, a contact terminal or an end of an electrical cable. Since at least one of the inner shell and the tail tube is provided with a sealing member on the outer periphery, and the sealing member sleeved on the outer periphery of the inner shell abuts against the end face of the first pipe opening along the circumferential direction, or the sealing member sleeved on the outer periphery of the tail tube abuts against the end face of the second shell end along the circumferential direction, or the sealing member sleeved on the outer periphery of the inner shell abuts against the sealing member sleeved on the outer periphery of the tail tube along the circumferential direction, the sealing member can be used to fill the gap between the second shell end and the first pipe opening along the circumferential direction, and prevent the liquid from entering the internal space along the gap between the second shell end and the first pipe opening. Since the sealing member is positioned and sleeved on the outer periphery of the inner shell or the tail tube, when the inner shell or the tail tube is placed in the inner cavity, the inner shell or the tail tube can drive the sealing member into the inner cavity. In addition, when the inner shell or tail pipe is removed from the inner cavity, the inner shell or tail pipe can drive the seal to exit the inner cavity. The inner periphery of the seal is supported and limited, maintaining a stable shape, so that a stable sealing effect can be provided when abutting and fitting. When disassembling the plug, there is no need to remove the seal separately, which is conducive to simplifying the disassembly operation of the plug.

[0010] In one of the embodiments, at least one of the inner shell and the tail pipe is connected to an outer peripheral side with a positioning protrusion protruding relative to the outer peripheral surface; the positioning protrusion is inserted into the sealing member.

[0011] In one of the embodiments, when the positioning protrusion is connected to the outer peripheral side of the tail pipe, the positioning protrusion is arranged around the outer periphery of the tail pipe; the sealing member includes a first annular portion and a second annular portion, and the first annular portion and the second annular portion are arranged on both sides of the positioning protrusion along the axial direction of the tail pipe; the sealing member also includes a connecting portion, and the connecting portion is connected between the first annular portion and the second annular portion.

[0012] In one embodiment, a plurality of notches are formed on the outer periphery of the positioning protrusion; the connecting portion is accommodated in the notches; and the ring width of the positioning protrusion corresponds to the ring width of the first ring portion or the ring width of the second ring portion.

[0013] In one of the embodiments, when the positioning protrusions are connected to the outer circumference of the tail pipe, a plurality of the positioning protrusions are spaced apart and distributed along the outer circumference of the tail pipe.

[0014] In one embodiment, when the sealing member is provided on the positioning sleeve on the outer peripheral side of the tail pipe, the sealing member is injection molded on the outer peripheral side of the tail pipe, or the sealing member is interference fit with the outer peripheral surface of the tail pipe.

[0015] In one embodiment, when the seal is positioned and sleeved on the outer periphery of the tail pipe, the end face of the second shell end faces the end face of the first pipe orifice and the end face of the seal; the end face of the seal protrudes relative to the end face of the first pipe orifice in a direction close to the inner shell.

[0016] In one embodiment, the annular width of the end face of the second shell end is greater than the annular width of the end face of the first pipe orifice.

[0017] In one embodiment, a circumferential convex edge portion is connected to the end face of the second shell end; the circumferential convex edge portion protrudes relative to the end face of the second shell end in a direction close to the tail pipe; the circumferential convex edge portion abuts against the end face of the seal in the circumferential direction.

[0018] In one embodiment, when the seal is positioned and sleeved on the outer periphery of the tail pipe, the outer diameter of the outer peripheral surface of the tail pipe is stepped and forms a first limiting surface arranged along the outer circumference of the tail pipe; the first limiting surface faces away from the first pipe orifice; the first limiting surface abuts against the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic view of a plug according to an embodiment of the present application.

[0020] Figure 2 is Figure 1 A three-dimensional schematic view of the plug shown in another angle.

[0021] Figure 3 is Figure 1 A three-dimensional sectional view of the plug shown.

[0022] Figure 4 is Figure 1 An exploded schematic view of the plug shown.

[0023] Figure 5 is Figure 1 An exploded schematic view of the plug shown in another angle.

[0024] Figure 6 is Figure 5 A partial exploded three-dimensional sectional view of the tail pipe and the seal in the plug shown.

[0025] Figure 7 is Figure 5 A partial exploded sectional view of the tail pipe and the seal in the plug shown.

[0026] Reference numerals: 100, plug; 20, contact terminal; 30, insulator; 40, housing; 41, inner cavity; 42, front end; 43, tail end; 50, inner housing; 51, first housing end; 52, second housing end; 53, circumferential convex edge portion; 60, tail pipe; 61, first pipe orifice; 521 / 611 / 701, end face; 62, second pipe orifice; 63, internal space; 64, positioning bump; 641, notch; 65, first limiting surface; 70, seal; 71, first annular portion; 72, second annular portion; 73, connecting portion; 74, second limiting surface; 80, end cap; F1, insertion direction. Detailed implementation manners

[0027] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0028] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between two elements inside. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0030] The technical solutions provided by the embodiments of the present application will be introduced below with reference to the accompanying drawings.

[0031] Combined with Figure 1 and Figure 2As shown, the present application provides a plug 100. In some embodiments, the plug 100 can be used to be fixed at the end of an electrical cable. In some embodiments, the plug 100 is used to dock with a socket. A part of the plug 100 is received into the socket along the insertion direction F1 of the plug 100. In some embodiments, the docking between the plug 100 and the socket is used to achieve the transfer of electrical energy or electrical signals. In some embodiments, the plug 100 of the present application can also be used to dock with other plugs. Specifically, the plug 100 of the present application can be a male plug or a female plug.

[0032] Specifically, the electrical cable can include an insulating layer and a plurality of conductor cores within the insulating layer.

[0033] In some embodiments, in combination with Figure 3 and Figure 5 As shown, the plug 100 includes a plurality of contact terminals 20 and an insulator 30. The plurality of contact terminals 20 are inserted into the insulator 30. The insulator 30 covers the outer peripheral surface of the contact terminals 20 to keep different contact terminals 20 insulated from each other. In some embodiments, one end of the contact terminal 20 is used to achieve electrical docking with a conductive component in a socket or other plug, and the other end of the contact terminal 20 is exposed outside the insulator 30 and connected to the conductor core of the electrical cable.

[0034] In some embodiments, in combination with Figures 3 to 5 As shown, the plug 100 includes: a housing 40, an inner housing 50 and a tail pipe 60. The housing 40 defines an inner cavity 41 along the circumferential direction. The inner housing 50 has opposite first housing ends 51 and second housing ends 52 along the insertion direction F1, and at least the second housing end 52 of the inner housing 50 is received into the inner cavity 41. The tail pipe 60 has opposite first pipe openings 61 and second pipe openings 62 along the insertion direction F1, and at least the first pipe opening 61 of the tail pipe 60 is received into the inner cavity 41. The first pipe opening 61 is disposed opposite to the second housing end 52. A sealing member 70 is disposed on the outer periphery of at least one of the inner housing 50 and the tail pipe 60 for positioning. The sealing member 70 sleeved on the outer periphery of the inner housing 50 abuts against the first pipe opening 61 along the circumferential direction, or the sealing member 70 sleeved on the outer periphery of the tail pipe 60 abuts against the second housing end 52 of the inner housing 50 along the circumferential direction, or the sealing member 70 sleeved on the outer periphery of the inner housing 50 abuts against the sealing member 70 sleeved on the outer periphery of the tail pipe 60 along the circumferential direction.

[0035] Specifically, the second shell end 52 of the inner shell 50 is connected to the first pipe opening 61 of the tail pipe 60 in the inner cavity 41, and the inner shell 50 and the tail pipe 60 together define an internal space 63 along the circumferential direction, and the internal space 63 is used to accommodate the insulator 30, the contact terminal 20 or the end of the electrical cable. Since the seal 70 is positioned and sleeved on the outer circumference of at least one of the inner shell 50 and the tail pipe 60, and the seal 70 sleeved on the outer circumference of the inner shell 50 abuts against the end face 611 of the first pipe opening 61 along the circumferential direction, or the seal 70 sleeved on the outer circumference of the tail pipe 60 abuts against the end face 521 of the second shell end 52 along the circumferential direction, or the seal 70 sleeved on the outer circumference of the inner shell 50 abuts against the seal 70 sleeved on the outer circumference of the tail pipe 60 along the circumferential direction, the seal 70 can be used to fill the gap between the second shell end 52 and the first pipe opening 61 along the circumferential direction, and prevent the liquid from entering the internal space 63 along the gap between the second shell end 52 and the first pipe opening 61. Since the seal 70 is positioned and sleeved on the outer circumference of the inner shell 50 or the tail pipe 60, when the inner shell 50 or the tail pipe 60 is placed in the inner cavity 41, the inner shell 50 or the tail pipe 60 can drive the seal 70 into the inner cavity 41. In addition, when the inner shell 50 or the tail pipe 60 is removed from the inner cavity 41, the inner shell 50 or the tail pipe 60 can drive the sealing member 70 to withdraw from the inner cavity 41. The inner periphery of the sealing member 70 is supported and limited, and a stable shape is maintained, so that a stable sealing effect can be provided when abutting and fitting. When disassembling the plug 100, there is no need to remove the sealing member 70 separately, which is conducive to simplifying the disassembly operation of the plug 100.

[0036] In some embodiments, in combination Figure 3 and Figure 4 As shown, the housing 40 is provided with a front end 42 and a rear end 43 opposite to each other along the insertion direction F1. In some embodiments, the plug 100 further includes an end cap 80 threadedly connected to the rear end 43 of the housing 40.

[0037] In some embodiments, in combination Figure 3 As shown, the insulator 30 and the contact terminal 20 are positioned and accommodated in the inner shell 50. In some embodiments, the inner shell 50 is inserted into the inner cavity 41 from the tail end 43 of the outer shell 40 through the first pipe opening 61. The inner shell 50 is limited in the inner cavity 41 along the insertion direction F1. Thereafter, the tail pipe 60 is inserted into the inner cavity 41 from the tail end 43 of the outer shell 40 through the first pipe opening 61. After the tail pipe 60 is installed in place, the end cap 80 is connected to the outer shell 40, and the end cap 80 abuts against the surface of the tail pipe 60 facing away from the inner shell 50, so that the tail pipe 60 and the inner shell 50 are in a stable position relative to the outer shell 40.

[0038] In some embodiments, in combination Figure 6 and Figure 7As shown, a positioning convex block 64 protruding relative to its own outer peripheral surface is connected to the outer peripheral side of at least one of the inner shell 50 and the tail pipe 60. The positioning convex block 64 is inserted into the seal 70. In some embodiments, the positioning convex block 64 penetrates through the seal 70. In some other embodiments, it may also be that the positioning convex block 64 is covered by the seal 70. In some embodiments, the positioning convex block 64 is in close fit with the wall surface of the seal 70, so as to prevent liquid from passing through the gap between the positioning convex block 64 and the seal 70.

[0039] In some embodiments, a seal 70 is positioned and sleeved on the outer periphery of the inner shell 50. A positioning convex block 64 protruding relative to its outer peripheral surface is connected to the outer peripheral side of the inner shell 50. The positioning convex block 64 is inserted into the seal 70. Specifically, the positioning convex block 64 is inserted into the seal 70 along the radial direction of the inner shell 50. When the inner shell 50 moves axially relative to the outer shell 40, the positioning convex block 64 abuts against the wall surface of the seal 70, so that the inner shell 50 can drive the seal 70 into the inner cavity 41, and the inner shell 50 can drive the seal 70 out of the inner cavity 41. In some embodiments, the seal 70 is injection-molded on the outer periphery of the inner shell 50, so that the seal 70 is tightly connected to the positioning convex block 64 and the inner shell 50 respectively. In some embodiments, the positioning convex block 64 is integrally formed with the inner shell 50.

[0040] In some embodiments, in combination with Figure 6 and Figure 7 As shown, a seal 70 is positioned and sleeved on the outer periphery of the tail pipe 60. A positioning convex block 64 protruding relative to its outer peripheral surface is connected to the outer peripheral side of the tail pipe 60. The positioning convex block 64 is inserted into the seal 70. Specifically, the positioning convex block 64 is inserted into the seal 70 along the radial direction of the tail pipe 60. When the tail pipe 60 moves axially relative to the outer shell 40, the positioning convex block 64 abuts against the wall surface of the seal 70, so that the tail pipe 60 can drive the seal 70 into the inner cavity 41, and the tail pipe 60 can drive the seal 70 out of the inner cavity 41. In some embodiments, the seal 70 is injection-molded on the outer peripheral side of the tail pipe 60, so that the seal 70 is tightly connected to the positioning convex block 64 and the tail pipe 60 respectively. In some embodiments, the positioning convex block 64 is integrally formed with the tail pipe 60.

[0041] In some embodiments, in combination with Figure 3As shown, when a seal 70 is positioned and sleeved on the outer periphery of the tail pipe 60, the end face 521 of the second shell end 52 faces the end face 611 of the first pipe orifice 61 and the end face 701 of the seal 70. One end face 701 of the seal 70 protrudes relative to the end face 611 of the first pipe orifice 61 in a direction close to the inner shell 50. Specifically, the seal 70 has flexibility and elasticity. Since the end face 701 of the seal 70 protrudes relative to the end face 611 of the first pipe orifice 61 in a direction close to the inner shell 50, before the end face 521 of the second shell end 52 abuts against the end face 611 of the first pipe orifice 61, the end face 521 of the second shell end 52 abuts against the end face 701 of the seal 70 in the circumferential direction. After the end face 521 of the second shell end 52 abuts against the end face 611 of the first pipe orifice 61, the end face 521 of the second shell end 52 abuts against the end face 701 of the seal 70 in the circumferential direction with a certain pressure, so as to form a two-layer sealing fit. The end face 521 of the outer-layer second shell end 52 and the end face 701 of the seal 70 play a main sealing role. Specifically, the end face 521 of the second shell end 52 faces the end face 611 of the first pipe orifice 61 and the end face 701 of the seal 70 along the axial direction of the inner shell 50. In some embodiments, the two end faces of the seal 70 are oppositely arranged along the insertion direction F1.

[0042] In some embodiments, in combination Figure 5 As shown, the end face 521 of the second shell end 52 is annular. The ring width of the end face 521 of the second shell end 52 is greater than the ring width of the end face 611 of the first pipe orifice 61, so that the end face 521 of the second shell end 52 faces the end face 611 of the first pipe orifice 61 and the end face 701 of the seal 70 with a larger area, and there is a larger fitting area between the end face 521 of the second shell end 52 and the seal 70, which is beneficial to improving the sealing effect between the inner shell 50 and the tail pipe 60.

[0043] In some embodiments, in combination Figure 3 and Figure 5 As shown, a circumferential convex edge portion 53 is connected to the end face 521 of the second shell end 52. The circumferential convex edge portion 53 protrudes relative to the end face 521 of the second shell end 52 in a direction close to the tail pipe 60. The circumferential convex edge portion 53 abuts against the end face 701 of the seal 70 in the circumferential direction. Specifically, the ring width of the circumferential convex edge portion 53 is relatively smaller than the ring width of the end face 521 of the second shell end 52, and the circumferential convex edge portion 53 generates a greater pressure on the end face 701 of the seal 70, so as to form a higher fitting strength between the circumferential convex edge portion 53 and the seal 70, and can resist a higher water pressure, thereby improving the waterproof level of the plug 100. In addition, in combination with the flexibility and flammability of the seal 70, the circumferential convex edge portion 53 makes the relative gap between the second shell end 52 and the seal 70 change greatly in the circumferential direction near the circumferential convex edge portion 53, so as to generate a greater resistance to liquid. In some embodiments, the circumferential convex edge portion 53 is integrally provided with the inner shell 50.

[0044] In some other embodiments, when a seal 70 is positioned and sleeved on the outer periphery of the inner shell 50, the end face 611 of the first pipe orifice 61 faces the end face 521 of the second shell end 52 and the end face of the seal 70. The end face of the seal 70 protrudes relative to the end face 521 of the second shell end 52 in a direction close to the tail pipe 60.

[0045] In some embodiments, in combination Figure 6 with Figure 7 As shown, when a positioning lug 64 is connected to the outer peripheral side of the tail pipe 60, the positioning lug 64 is arranged around the outer periphery of the tail pipe 60. The seal 70 includes a first annular portion 71 and a second annular portion 72. The first annular portion 71 and the second annular portion 72 are arranged on both sides of the positioning lug 64 along the axial direction of the tail pipe 60. The seal 70 further includes a connecting portion 73, and the connecting portion 73 is connected between the first annular portion 71 and the second annular portion 72. Specifically, since the positioning lug 64 is arranged around the outer periphery of the tail pipe 60 and the inner peripheral edge of the positioning lug 64 is circular, the positioning lug 64 can provide support for the first annular portion 71 or the second annular portion 72 at multiple circumferential angles. In some embodiments, the first annular portion 71 is arranged closer to the inner shell 50 than the second annular portion 72. During the process of inserting the first pipe orifice 61 of the tail pipe 60 into the inner cavity 41, the positioning lug 64 supports the first annular portion 71, so that the first annular portion 71 overcomes the friction of the inner wall surface of the outer shell 40 and enters the inner cavity 41. During the process of the first pipe orifice 61 of the tail pipe 60 withdrawing from the inner cavity 41, the positioning lug 64 supports the second annular portion 72, so that the second annular portion 72 overcomes the friction of the inner wall surface of the outer shell 40 and withdraws from the inner cavity 41. When one side of the first annular portion 71 abuts against the end face 521 of the second shell end 52, the positioning lug 64 abuts against the other side of the first annular portion 71, so that the first annular portion 71 can be deformed to adapt to the circumferential gap between the second shell end 52 and the first pipe orifice 61.

[0046] Specifically, since the first annular portion 71 and the second annular portion 72 are arranged on both sides of the positioning lug 64 along the axial direction of the tail pipe 60 and are connected by the connecting portion 73, it is beneficial to improve the support stability of the positioning lug 64 for the seal 70 and to prevent the seal 70 from falling off the tail pipe 60.

[0047] In some embodiments, in combination Figure 6 with Figure 7As shown, a plurality of notches 641 are formed on the outer peripheral edge of the positioning bump 64. The connecting portion 73 is received in the notch 641. The width of the ring of the positioning bump 64 corresponds to the width of the ring of the first annular portion 71 or the width of the ring of the second annular portion 72. Specifically, since the connecting portion 73 is received in the notch 641, the positioning bump 64 can extend relatively outward in the peripheral direction until the outer edge of the positioning bump 64 is close to the outer edge of the seal 70.

[0048] In some embodiments, in combination Figure 3 with Figure 6 as shown, the width of the ring of the positioning bump 64 is close to the width of the ring of the first annular portion 71. Therefore, there is a relatively large relative area between the positioning bump 64 and the first annular portion 71, which is beneficial to improving the support stability of the positioning bump 64 for the seal 70. In some embodiments, the width of the ring of the positioning bump 64 is close to the width of the ring of the second annular portion 72. In some embodiments, the width of the ring of the first annular portion 71 is the same as the width of the ring of the second annular portion 72.

[0049] In some embodiments, in combination Figure 7 as shown, the depth of the notch 641 along the radial direction of the tail pipe 60 is less than the width of the ring of the positioning bump 64, which is beneficial to improving the structural strength of the positioning bump 64 and making the shape of the positioning bump 64 closer to a complete ring. In some embodiments, the inner side of the connecting portion 73 is attached to the boundary surface of the notch 641. The outer side of the connecting portion 73 is in an arc transition, and the shape corresponds to the outer edge shapes of the first annular portion 71 and the second annular portion 72 respectively, so that the cross-sectional area of the connecting portion 73 can be maximized and the risk of breakage of the connecting portion 73 can be reduced.

[0050] In some embodiments, when the positioning bump 64 is connected to the outer peripheral side of the tail pipe 60, a plurality of positioning bumps 64 are spaced apart along the outer circumference of the tail pipe 60. Therefore, a plurality of positioning bumps 64 can provide support for the seal 70 from different angles, which is beneficial to improving the connection stability between the seal 70 and the tail pipe 60. Specifically, the inner peripheral edge and the outer peripheral edge of the positioning bump 64 are respectively arc-shaped. In some embodiments, a plurality of positioning bumps 64 are evenly spaced along the outer circumference of the tail pipe 60. Specifically, after the seal 70 is sleeved on the outside of the tail pipe 60, the seal 70 is also partially received in the circumferential gap between adjacent positioning bumps 64.

[0051] In some embodiments, in combination Figure 3 as shown, when the seal 70 is positioned and sleeved on the outer periphery of the tail pipe 60, the seal 70 is provided with an interference fit with the outer peripheral surface of the tail pipe 60, so that the seal 70 is closely attached to the outer peripheral surface of the tail pipe 60. The seal 70 generates a large pressure on the outer peripheral surface of the tail pipe 60, increasing the relative friction force between the seal 70 and the tail pipe 60 and effectively preventing the seal 70 from detaching from the outer peripheral side of the tail pipe 60.

[0052] In some embodiments, in combination with Figure 3 and Figure 7 As shown, when a seal 70 is positioned and sleeved on the outer periphery of the liner 60, the outer diameter of the outer peripheral surface of the liner 60 has a stepped transition and forms a first limiting surface 65 arranged along the outer circumference of the liner 60. The first limiting surface 65 faces away from the first pipe orifice 61, and the first limiting surface 65 abuts against the seal 70, so that the first limiting surface 65 can be used to prevent the seal 70 from falling off from the first pipe orifice 61. Specifically, the inner diameter of the seal 70 is smaller than the outer diameter of the first limiting surface 65. In some embodiments, the first limiting surface 65 abuts against the first annular portion 71.

[0053] In some embodiments, in combination with Figure 3 and Figure 6 As shown, the inner diameter of the inner peripheral surface of the seal 70 has a stepped transition, and the first annular portion 71 has an annular stepped transition and forms a second limiting surface 74 arranged along the inner circumference of the seal 70. The second limiting surface 74 is arranged opposite to the first limiting surface 65.

[0054] In some other embodiments, when the positioning bump 64 is connected to the outer peripheral side of the inner shell 50, the corresponding structures in various embodiments when the positioning bump 64 is connected to the liner 60 can be correspondingly adopted.

[0055] The above embodiments are only descriptions of the preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A plug, characterized in that: include: A housing circumferentially defines an inner cavity; An inner shell is provided with a first shell end and a second shell end opposite to each other along the insertion direction, and the inner shell is accommodated in the inner cavity with at least the second shell end; The tail pipe is provided with a first pipe opening and a second pipe opening relative to each other along the insertion direction, and the tail pipe is accommodated in the inner cavity with at least the first pipe opening; the first pipe opening is arranged opposite to the second shell end; a sealing member is provided on the outer peripheral positioning sleeve of at least one of the inner shell and the tail pipe; the sealing member sleeved on the outer periphery of the inner shell abuts against the first pipe opening in the circumferential direction, or the sealing member sleeved on the outer periphery of the tail pipe abuts against the second shell end of the inner shell in the circumferential direction, or the sealing member sleeved on the outer periphery of the inner shell abuts against the sealing member sleeved on the outer periphery of the tail pipe in the circumferential direction.

2. The plug according to claim 1, characterized in that: A positioning convex block protruding relative to the outer peripheral surface is connected to the outer peripheral side of at least one of the inner shell and the tail pipe; and the positioning convex block is inserted in the sealing member.

3. The plug according to claim 2, characterized in that: When the positioning protrusion is connected to the outer peripheral side of the tail pipe, the positioning protrusion is arranged around the outer periphery of the tail pipe; the sealing member includes a first annular portion and a second annular portion, and the first annular portion and the second annular portion are arranged on both sides of the positioning protrusion along the axial direction of the tail pipe; the sealing member also includes a connecting portion, and the connecting portion is connected between the first annular portion and the second annular portion.

4. The plug according to claim 3, characterized in that: A plurality of notches are formed on the outer periphery of the positioning protrusion; the connecting portion is accommodated in the notches; and the ring width of the positioning protrusion corresponds to the ring width of the first ring portion or the ring width of the second ring portion.

5. The plug according to claim 2, characterized in that: In the case where the positioning protrusions are connected to the outer circumference of the tail pipe, a plurality of the positioning protrusions are spaced apart and distributed along the outer circumference of the tail pipe.

6. The plug according to claim 1, characterized in that: In the case where the sealing member is provided on the positioning sleeve on the outer peripheral side of the tail pipe, the sealing member is injection molded on the outer peripheral side of the tail pipe, or the sealing member is interference fit with the outer peripheral surface of the tail pipe.

7. The plug according to claim 1, characterized in that: When the sealing member is provided on the peripheral positioning sleeve of the tail pipe, the end face of the second shell end faces the end face of the first pipe opening and the end face of the sealing member; the end face of the sealing member is raised relative to the end face of the first pipe opening in a direction close to the inner shell.

8. The plug according to claim 7, characterized in that: The ring width of the end surface of the second shell end is greater than the ring width of the end surface of the first pipe opening.

9. The plug according to claim 7, characterized in that: The end surface of the second shell end is connected with a circumferential flange portion; the circumferential flange portion is protruded relative to the end surface of the second shell end in a direction close to the tail pipe; and the circumferential flange portion abuts against the end surface of the sealing member in the circumferential direction.

10. The plug according to claim 1, characterized in that When the sealing member is disposed on the peripheral positioning sleeve of the tail pipe, the outer diameter of the outer peripheral surface of the tail pipe is stepped to form a first limiting surface arranged along the outer circumference of the tail pipe; the first limiting surface faces away from the first pipe opening; and the first limiting surface abuts against the sealing member.

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