A connector plug

Abstract

The application discloses a connector plug, comprising: a shell, a tail cover and a first sealing ring, the shell has a plug end and a tail end, the plug end can be plugged into a socket, the tail end can be inserted into a cable, the first sealing ring is arranged in the interior of the shell and is in contact sealing with the cable, the tail cover is arranged at the tail end to limit the axial displacement of the first sealing ring; the edge of the tail end is provided with a plurality of clamping grooves, the outer wall of the first sealing ring is provided with a clamping platform corresponding to the plurality of clamping grooves, and the clamping grooves can limit the clamping platform and further limit the movement of the first sealing ring towards the plug end. The application prevents the sealing ring from sinking through the cooperation of the clamping platform and the clamping groove, avoids triggering a series of chain reactions which seriously affect the performance of the connector, improves the protection level and insulation performance of the connector, and increases the service life of the product.

Description

Technical Field

[0001] This application relates to the technical field of connectors, and more particularly to a connector plug. Background Technology

[0002] In numerous electronic devices and electrical connection scenarios, connectors, as key components for achieving electrical connections, are of paramount importance in terms of performance stability and reliability. Currently, many connector plugs on the market rely on the compression deformation of rubber sealing rings to achieve a sealing function. This design can, to a certain extent, meet the sealing requirements under normal conditions, ensuring that the internal electrical connection of the connector is not easily disturbed by external factors.

[0003] However, with the increasing complexity and diversification of application scenarios, this traditional sealing method has exposed many serious problems. On the one hand, during the frequent insertion and removal of connectors, the sealing ring is repeatedly subjected to friction and compression; under mechanical vibration environments, the sealing ring must withstand continuous dynamic stress; and under extreme temperature changes, the physical properties of rubber materials will change significantly, such as the obvious thermal expansion and contraction effect. These factors combined can easily cause the sealing ring to shift, deviating from its original sealing position and failing to effectively fill the gap between the connector plug and the shell. At the same time, frequent physical actions and harsh environments will also accelerate the aging process of the sealing ring, reducing its elasticity, increasing its hardness, and even causing cracking and breakage, ultimately leading to the sealing ring falling off. Once the sealing ring fails, moisture, dust, and other impurities from the external environment will enter the connector without hindrance, directly affecting the stability and reliability of the connector, thus causing connection failure and posing a serious threat to the normal operation of the entire electronic system or electrical equipment.

[0004] On the other hand, even under seemingly good sealing conditions, the microstructure between the sealing ring and the housing is not perfectly tight. Under harsh environmental conditions, minute substances such as moisture and dust can still gradually seep into the connector through these microscopic gaps. Once these contaminants enter, they adhere to the contact surfaces, hindering a tight fit between the contacts, leading to increased contact resistance and poor contact problems. Moreover, with long-term accumulation of contaminants, they form an abrasive layer on the contact surfaces, continuously wearing down the contacts, damaging their surface finish and conductivity, thus significantly shortening the connector's lifespan and increasing equipment maintenance costs and the risk of failure. Utility Model Content

[0005] The purpose of this application is to provide a connector plug that can solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, this application adopts the following technical solution: On one hand, a connector plug is provided, comprising: a housing, a tail cap, and a first sealing ring, wherein the housing has a plug end and a tail end, the plug end being pluggable into a socket, the tail end being for cable insertion, the first sealing ring being disposed inside the housing and in contact with and sealing the cable, and the tail cap being disposed at the tail end to limit the axial displacement of the first sealing ring; The edge of the tail end is provided with multiple slots, and the outer wall of the first sealing ring is provided with a locking platform corresponding to each of the multiple slots. The slots can limit the locking platforms and thus restrict the first sealing ring from moving toward the insertion end.

[0007] Furthermore, a limiting groove is provided on the upper inner side of the first sealing ring, and a limiting boss is provided on the tail cover. The limiting boss cooperates with the limiting groove to limit the radial displacement of the card plate.

[0008] Furthermore, a clearance groove is provided on the inner side of the tail end.

[0009] Furthermore, the outer wall of the outer shell is provided with multiple buckles at intervals, and the tail cover is provided with snap-fit ​​holes that correspond one-to-one with the multiple buckles.

[0010] Furthermore, the housing is also provided with a rubber core, and a terminal is provided inside the rubber core, and the cable is electrically connected to the terminal.

[0011] Furthermore, a locking member is provided on the outer side of the adhesive core, and at least part of the locking member passes through the adhesive core and engages with the terminal for limiting.

[0012] Furthermore, the outer side of the core is provided with a mounting groove, and multiple through grooves are opened in the mounting groove. The locking member is fitted into the mounting groove, and multiple ribs are protruding from the inner wall of the locking member. The ribs extend through the through grooves to the inner side of the core, and the terminal is provided with a groove that cooperates with and limits the ribs.

[0013] Furthermore, it also includes a finger-proof rod, one end of which is connected to the terminal and the other end extends toward the plug-in end.

[0014] Furthermore, a second sealing ring is provided on the outer wall of the outer casing.

[0015] Furthermore, a shielding clamp is provided inside the outer casing, and the shielding clamp is located on the outside of the cable.

[0016] The beneficial effects of this application are as follows: By setting multiple slots at the tail edge of the outer shell and corresponding locking platforms on the outer wall of the first sealing ring, the locking slots effectively limit the movement of the first sealing ring towards the insertion end, preventing the first sealing ring from sinking under harsh conditions such as frequent insertion and removal, mechanical vibration, or extreme temperature changes, thus preventing a decrease in sealing performance due to the sinking of the first sealing ring. Simultaneously, the tail cap further restricts the axial displacement of the first sealing ring. This dual protection ensures that the first sealing ring remains stably in the correct sealing position, always in close contact with the cable, effectively preventing moisture, dust, and other minute substances from seeping into the connector through gaps. This not only ensures a tight fit between the internal contacts of the connector, avoiding poor contact caused by contaminants, but also reduces wear on the contacts caused by contaminants, significantly extending the connector's service life, improving the stability and reliability of the connector in complex and harsh environments, and reducing equipment maintenance costs and failure risks. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the connector plug described in an embodiment of this application; Figure 2 This is a cross-sectional view of the connector plug described in an embodiment of this application; Figure 3 This is an exploded view of the outer casing, tail cap, and first sealing ring described in the embodiments of this application; Figure 4 This is a schematic diagram of the first sealing ring in an embodiment of this application; Figure 5 This is a schematic diagram of the tail cap described in an embodiment of this application; Figure 6 This is an assembly drawing of the core, terminal, and locking element described in the embodiments of this application; Figure 7 This is an exploded view of the adhesive core, terminal, and locking element described in the embodiments of this application.

[0019] In the diagram: 1. Outer shell; 101. Slot; 102. Clearance groove; 103. Buckle; 2. Tail cap; 201. Snap-fit ​​hole; 202. Limiting boss; 3. First sealing ring; 301. Slot; 302. Limiting groove; 4. Cable; 5. Glue core; 501. Mounting groove; 502. Through groove; 6. Terminal; 601. Groove; 7. Locking element; 701. Raised rib; 8. Anti-touch finger rod; 9. Second sealing ring. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1-7 As shown, this embodiment provides a connector plug, including: a housing 1, a tail cap 2, and a first sealing ring 3. The housing 1 has a plug end and a tail end. The plug end can be plugged into a socket, and the tail end can be used to insert a cable 4. The first sealing ring 3 is disposed inside the housing 1 and contacts and seals with the cable 4. The tail cap 2 is disposed at the tail end to limit the axial displacement of the first sealing ring 3. The edge of the tail end is provided with a plurality of slots 101. The outer wall of the first sealing ring 3 is provided with a locking platform 301 corresponding to each of the plurality of slots 101. The slots 101 can limit the locking platform 301 and thus limit the movement of the first sealing ring 3 toward the plug end.

[0024] Based on the above solution, a first sealing ring 3 is provided inside the outer casing 1. This first sealing ring 3 contacts the cable 4 to achieve a seal, while the tail cap 2 restricts the axial displacement of the first sealing ring 3, preventing it from coming off the tail end. More importantly, multiple slots 101 are provided on the edge of the tail end, and corresponding retaining platforms 301 are provided on the outer wall of the first sealing ring 3. After the connector plug is assembled, the retaining platforms 301 on the outer wall of the first sealing ring 3 are inserted into the slots 101 on the edge of the tail end. Due to the limiting effect of the slots 101 on the retaining platforms 301, the first sealing ring 3 cannot move towards the insertion end. This avoids the first sealing ring 3 from sinking due to various external forces under conditions such as frequent insertion and removal, mechanical vibration, or extreme temperature changes, thus ensuring that the first sealing ring 3 is always in the correct sealing position and maintains a good sealing state.

[0025] In terms of sealing performance, this solution effectively constrains the movement of the first sealing ring 3 towards the insertion end through the precise engagement of the tail edge groove 101 and the outer wall retainer 301 of the first sealing ring 3. This fundamentally eliminates the possibility of the first sealing ring 3 sinking under complex and harsh operating environments (such as frequent insertion and removal, mechanical vibration, and extreme temperature changes), greatly enhancing the sealing stability of the first sealing ring 3 and ensuring that the connector plug maintains excellent sealing performance over a long period. From the perspective of the overall performance and service life of the connector, good sealing avoids contact problems caused by contaminant adhesion to the contact parts, ensuring the stability and reliability of the electrical connection and reducing equipment malfunctions caused by contact failures. At the same time, it reduces the wear of contaminants on the contact parts, slows down the aging process of the connector, significantly extends the service life of the connector, reduces the frequency of equipment maintenance and replacement, saves users a lot of operating costs and time costs, and improves the economic efficiency and overall stability of equipment operation.

[0026] Furthermore, a limiting groove 302 is provided on the upper inner side of the first sealing ring 3, and a limiting boss 202 is provided on the tail cap 2. The limiting boss 202 cooperates with the limiting groove 302 to limit the radial displacement of the locking platform 301. When the tail cap 2 is installed at the tail end of the outer shell 1, the limiting boss 202 on the tail cap 2 will be precisely embedded in the limiting groove 302 on the upper inner side of the first sealing ring 3. Since the limiting groove 302 and the limiting boss 202 are matched in shape and size, they form a tight fit. This fit can exert a radial constraint on the locking platform 301 on the first sealing ring 3, effectively preventing the locking platform 301 from shrinking inward and disengaging from the locking groove 101 when subjected to external forces, such as the pulling force generated by frequent insertion and removal, or the shaking force caused by mechanical vibration. The locking platform 301 is firmly restricted in the locking groove 101, so that the first sealing ring 3 is reliably fixed in both the axial and radial directions.

[0027] Furthermore, a clearance groove 102 is provided on the inner side of the tail end. When the operator installs the first sealing ring 3 onto the tail end of the outer casing 1, the first sealing ring 3 itself has a certain elasticity, and friction will be generated with the inner wall of the tail end of the outer casing 1 during the downward pushing process. Without the clearance groove 102, the inner wall of the tail end of the outer casing 1 would form a continuous and relatively tight enclosure around the first sealing ring 3. This tight enclosure would increase the resistance to the downward movement of the first sealing ring 3, making the pushing operation difficult, and may even cause the first sealing ring 3 to twist or deform during the pushing process, affecting the subsequent sealing effect. The existence of the clearance groove 102 breaks this continuous tight enclosure state. When the first sealing ring 3 moves downward, part of its area can enter the space formed by the clearance groove 102, reducing the contact area with the inner wall of the tail end of the outer casing 1, thereby reducing the friction and allowing the first sealing ring 3 to move more smoothly downward along the tail end. Alternatively, when installing the first sealing ring 3, the bottom outer wall of the first sealing ring 3 will first enter the relief groove 102. The radius of the relief groove 102 is relatively large. At this time, the friction between the first sealing ring 3 and the outer shell 1 is relatively small, which makes it easier for the first sealing ring 3 to move down and also plays a guiding role in the installation.

[0028] Preferably, the outer wall of the outer casing 1 is provided with a plurality of snap fasteners 103 at intervals, and the tail cap 2 is provided with snap-fit ​​holes 201 that correspond one-to-one with the plurality of snap fasteners 103. When assembling the tail cap 2 with the outer casing 1, the tail cap 2 is pushed toward the tail end of the outer casing 1, so that each snap fastener 103 on the outer casing 1 gradually approaches the corresponding snap-fit ​​hole 201 on the tail cap 2. As the pushing continues, the snap fasteners 103 will deform to a certain extent due to their own elasticity and smoothly enter into the snap-fit ​​hole 201. After entering, the snap fasteners 103 return to their original shape, and their snap-fit ​​parts form a tight snap-fit ​​connection with the inner wall of the snap-fit ​​hole 201, thereby firmly fixing the tail cap 2 to the tail end of the outer casing 1. Moreover, since the snap fasteners 103 and the snap-fit ​​holes 201 adopt a symmetrical distribution design, when the connector plug is subjected to external force, especially during high-frequency insertion and removal operations, the force borne by each snap fastener 103 can be evenly distributed. Each buckle 103 can bear the corresponding tensile and compressive forces according to the design requirements, avoiding damage to the buckle 103 or loosening of the connection due to excessive local stress.

[0029] In some embodiments, the housing 1 further includes a core 5, within which a terminal 6 is disposed, and the cable 4 is electrically connected to the terminal 6. The core 5 has a specific shape and structure, with the terminal 6 precisely positioned inside. The terminal 6, as the core component of the electrical connection, has a specific shape and contact point design. When the cable 4 is inserted into the connector plug, the conductor portion of the cable 4 mates with the terminal 6 within the core 5. During assembly, through reasonable structural design and assembly processes, it is ensured that the conductor of the cable 4 can be accurately inserted into the corresponding connection position of the terminal 6, achieving a stable and reliable electrical connection. The core 5 not only provides a fixed installation position for the terminal 6, ensuring the relative positional accuracy between the terminals 6, but also provides a certain degree of constraint and guidance for the cable 4, enabling the cable 4 to accurately reach the connection point with the terminal 6 along a predetermined path during insertion, preventing the cable 4 from shifting or misaligning, thus preventing poor connection.

[0030] Meanwhile, a locking member 7 is provided on the outer side of the core 5, and at least a portion of the locking member 7 passes through the core 5 to engage with the terminal 6. During connector plug assembly, the locking member 7 is in a ready-to-trigger state while the terminal 6 is being installed into the core 5. As the terminal 6 is gradually installed, a portion of the locking member 7 undergoes elastic deformation under the pressure or guidance of the terminal 6. When the terminal 6 reaches the predetermined correct installation position, the locking member 7 utilizes its elastic restoring force to allow at least a portion of its structure to pass through a pre-designed channel or hole on the core 5, precisely engaging with a specific limiting portion on the terminal 6. This limiting engagement effectively prevents the terminal 6 from loosening, shifting, or even falling off due to external forces during subsequent use, ensuring that the terminal 6 remains stably in the correct installation position and maintains a good electrical connection.

[0031] Specifically, the outer side of the core 5 is provided with a mounting groove 501, and multiple through slots 502 are formed within the mounting groove 501. The locking member 7 is fitted into the mounting groove 501, and multiple protruding ribs 701 are provided on the inner wall of the locking member 7. The protruding ribs 701 extend through the through slots 502 to the inner side of the core 5. The terminal 6 is provided with a groove 601 that cooperates with and limits the positioning of the protruding ribs 701. In the structural design of the connector plug, the mounting groove 501 on the outer side of the core 5 provides a precise installation and positioning space for the locking member 7. The multiple through slots 502 formed within the mounting groove 501 create a channel for the locking member 7 to engage with the inner terminal 6 of the core 5. The locking member 7 is fitted into the mounting groove 501, ensuring stable installation of the locking member 7 on the outer side of the core 5 and preventing displacement during subsequent use. The multiple protruding ribs 701 on the inner wall of the locking component 7 are key components for achieving the limiting engagement with the terminal 6. When the locking component 7 is installed in place, the protruding ribs 701 will pass through the through groove 502. Here, the protruding ribs 701 and the through groove 502 can play a foolproof fixing role, and simultaneously complete the sealing compression of the rubber core 5 and the outer shell 1. Compared with the traditional screw fixing method, it not only reduces the weight, but also shortens the assembly time.

[0032] During terminal 6 installation, as terminal 6 is gradually inserted into the core 5, the groove 601 on terminal 6 moves relative to the protrusion 701 of locking member 7. When terminal 6 is in place, the protrusion 701 precisely embeds into the groove 601 on terminal 6. At this time, the protrusion 701 and the groove 601 form a tight limiting fit, constraining terminal 6 from multiple directions. When subjected to external forces such as cable 4 pulling or insertion / removal impact, the fit between the protrusion 701 and the groove 601 effectively prevents terminal 6 from axially moving within the core 5, ensuring that terminal 6 is always stably in the correct installation position and maintaining a good electrical connection.

[0033] Optionally, the device also includes a finger-proof rod 8, one end of which is connected to the terminal 6, and the other end extends towards the insertion end. When the connector plug is not inserted, the terminal 6 is usually energized, posing a safety hazard of electric shock due to accidental contact. The finger-proof rod 8 is firmly connected to the terminal 6 at one end, and extends towards the insertion end at the other end. In its natural state, the finger-proof rod 8, due to its structural characteristics, forms a physical barrier between the terminal 6 and the fingers of personnel who may come into contact with it. When someone attempts to approach or touch the terminal 6, the finger-proof rod 8 will preferentially block further approach by the fingers, preventing them from directly contacting the energized terminal 6. Simultaneously, during the insertion operation of the connector plug, the finger-proof rod 8 extends towards the insertion end, and during the plug-socket mating process, the finger-proof rod 8 will not obstruct the normal insertion action. It will smoothly enter the corresponding space of the socket as the plug is inserted, without affecting the establishment of the electrical connection, ensuring that the connector plug achieves safety protection without affecting its basic insertion function.

[0034] Generally, the outer wall of the housing 1 is also provided with a second sealing ring 9. When the connector plug is inserted into the corresponding socket, the housing 1 will fit tightly against the housing 1 of the socket or other related components. At this time, the second sealing ring 9 provided on the outer wall of the housing 1 will be compressed and deformed due to its elastic material properties. This deformation allows the second sealing ring 9 to tightly fill the gap between the housing 1 and the socket components, forming a continuous and closed sealing area. This sealing area can effectively prevent foreign objects such as dust, moisture, and impurities from the external environment from entering the interior of the connector plug. At the same time, for some connectors with specific environmental requirements, such as those requiring waterproofing and moisture resistance, the second sealing ring 9 can also prevent liquid penetration, ensuring that the electrical components and terminals 6 inside the connector plug are in a dry and clean environment, maintaining their normal electrical and mechanical performance.

[0035] Furthermore, a shielding clamp is installed inside the outer casing 1, located on the outside of the cable 4. In the operating environment of modern electronic devices, various sources of electromagnetic interference exist, such as electromagnetic radiation from other electronic devices and electromagnetic noise in power lines. These electromagnetic interferences propagate in space in the form of electromagnetic waves. When the cable 4 connected to the connector plug is in such an electromagnetic environment, it is easily affected by interference. The shielding clamp is usually made of a material with good conductivity, such as copper. When an electromagnetic wave comes into contact with the shielding clamp, an induced current is generated on the surface of the clamp according to the principle of electromagnetic induction. This induced current generates a magnetic field opposite to the direction of the external electromagnetic field, thereby canceling or weakening the interference of the external electromagnetic field on the signal inside the cable 4. At the same time, the shielding clamp can also prevent electromagnetic waves generated by the signal inside the cable 4 from leaking outward, avoiding interference to other surrounding electronic devices and achieving a two-way electromagnetic shielding effect. In addition, the shielding clamp usually forms a good electrical connection with the outer casing 1 and other conductive components, further enhancing the overall shielding effectiveness and creating a relatively clean electromagnetic environment for signal transmission within the cable 4.

[0036] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0039] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A connector plug, characterized in that, include: The housing (1), the tail cap (2), and the first sealing ring (3) are provided. The housing (1) has a plug end and a tail end. The plug end can be plugged into a socket, and the tail end can be used to insert a cable (4). The first sealing ring (3) is located inside the housing (1) and contacts and seals the cable (4). The tail cap (2) is located at the tail end to limit the axial displacement of the first sealing ring (3). The edge of the tail end is provided with multiple slots (101), and the outer wall of the first sealing ring (3) is provided with a mounting plate (301) corresponding to each of the multiple slots (101). The slots (101) can limit the mounting plates (301) and thus restrict the first sealing ring (3) from moving toward the insertion end.

2. The connector plug of claim 1, wherein The upper inner side of the first sealing ring (3) is provided with a limiting groove (302), and the tail cover (2) is provided with a limiting boss (202). The limiting boss (202) cooperates with the limiting groove (302) to limit the radial displacement of the card plate (301).

3. The connector plug of claim 1, wherein An avoidance groove (102) is provided on the inner side of the tail end.

4. The connector plug according to any one of claims 1 to 3, characterized in that, The outer wall of the outer shell (1) is provided with a plurality of buckles (103) spaced apart, and the tail cap (2) is provided with snap-fit ​​holes (201) that correspond one-to-one with the plurality of buckles (103) to engage with each other.

5. The connector plug according to any one of claims 1 to 3, wherein The outer casing (1) is further provided with a core (5), and a terminal (6) is provided inside the core (5). The cable (4) is electrically connected to the terminal (6).

6. The connector plug of claim 5, wherein, A locking member (7) is provided on the outside of the core (5), and at least part of the locking member (7) passes through the core (5) and engages with the terminal (6) for positioning.

7. The connector plug of claim 6, wherein, The outer side of the core (5) is provided with a mounting groove (501), and a plurality of through grooves (502) are provided in the mounting groove (501). The locking member (7) is fitted into the mounting groove (501), and a plurality of protruding ribs (701) are provided on the inner wall of the locking member (7). The ribs (701) extend through the through grooves (502) to the inner side of the core (5). The terminal (6) is provided with a groove (601) that cooperates with and limits the ribs (701).

8. The connector plug of claim 5, wherein, It also includes a finger-proof rod (8), one end of which is connected to the terminal (6), and the other end extends toward the plug-in end.

9. The connector plug of any one of claims 1-3, wherein, The outer wall of the outer casing (1) is also provided with a second sealing ring (9).

10. The connector plug of any one of claims 1-3, wherein, The housing (1) is also provided with a shielding clamp inside, which is located on the outside of the cable (4).

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