Dust plug

Abstract

The application relates to the technical field of electric connectors, in particular to a dustproof plug. The dustproof plug comprises a first dustproof part, which comprises a first end cover provided with a first ring body, and a star-shaped first sealing ring arranged on the first ring body. A first electric connector seat of the electric connector comprises a first contact piece and a first sleeve, the first sleeve is arranged around the first contact piece to form a first gap, the first ring body can be inserted into the first ring gap, the first end cover is arranged on the first electric connector seat, and the first ring body is sealed against the first contact piece and the first sleeve through the inner lip and the outer lip of the first sealing ring. Thus, the first electric connector seat is sealed and dusted, and dust and foreign matters are prevented from entering the first contact piece; meanwhile, through the star-shaped first sealing ring, the self-adapting deformation of the inner lip and the outer lip can be utilized to dynamically and statically compensate the change of a sealing gap, so that the sealing gap is always filled, and the dustproof performance of the dustproof plug is effectively improved.

Description

Technical Field

[0001] This application relates to the field of electrical connector technology, and in particular to a dust plug. Background Technology

[0002] Electrical connectors are key components for power transmission in battery packs. To prevent poor contact, short circuits, and other malfunctions caused by dust or foreign objects entering the connectors when they are idle, dust plugs are usually required to seal the ports.

[0003] Currently, most dust plugs on the market rely on interference fits with connector ports to achieve sealing. However, in practical applications, battery packs are often exposed to vibration, and dust plugs are frequently inserted and removed. In these scenarios, relying solely on interference fits can easily lead to decreased sealing performance due to component wear and changes in clearance, making it difficult to consistently meet the dustproof sealing requirements of electrical connectors over the long term. Utility Model Content

[0004] The purpose of this invention is to provide a dust plug that improves the sealing and dustproof performance of the dust plug to a certain extent.

[0005] This utility model provides a dust plug, including a first dustproof part; The first dustproof part includes a first end cap, a first ring is formed on one side of the first end cap, and a first sealing ring is provided on the first ring, which is a star-shaped sealing ring. The first dustproof part is used for the first electrical connector base of the electrical connector. The first electrical connector base includes a first contact and a first sleeve. The first sleeve is disposed around the outside of the first contact to form a first annular gap. The first ring body can be adapted to be inserted into the first ring gap, and the first ring body is sealed against the outer peripheral sidewall of the first contact member through the inner lip of the first sealing ring, and the first ring body is sealed against the inner peripheral sidewall of the first sleeve through the outer lip of the first sealing ring.

[0006] Furthermore, a second ring is formed on the first end cap, and the second ring is disposed around the outside of the first ring. When the first ring body is inserted into the first annular gap, the second ring body is sleeved on the outside of the first sleeve, and the inner peripheral sidewall of the second ring body and the outer peripheral sidewall of the first sleeve are sealed and abutted in an interference fit.

[0007] Furthermore, a third ring body is also formed on the first end cap, the third ring body is arranged around the outside of the second ring body, and the third ring body is provided with a plurality of hooks, the plurality of hooks being spaced apart along the circumference of the third ring body; The first electrical connector is formed around the first sleeve to form a connector seat. The connector seat is provided with a plurality of slots spaced apart circumferentially, and the plurality of hooks can be engaged in the plurality of slots one by one.

[0008] Furthermore, the dust plug also includes a second dustproof part, which includes a second end cap. A fourth ring is formed on one side of the second end cap, and a second sealing ring is provided on the fourth ring. The second sealing ring is a star-shaped sealing ring. The second dustproof part is used for the second electrical connector base of the electrical connector. The second electrical connector base includes a second contact and a second sleeve. The second sleeve is disposed around the outside of the second contact to form a second annular gap. The fourth ring can be adapted to be inserted into the second ring gap, and the fourth ring is sealed against the outer peripheral sidewall of the second contact member through the inner lip of the second sealing ring, and the fourth ring is sealed against the inner peripheral sidewall of the second sleeve through the outer lip of the second sealing ring.

[0009] Furthermore, a fifth ring is formed on the second end cap, the fifth ring being arranged around the outside of the fourth ring; The second electrical connector has a third sleeve that surrounds the outside of the second sleeve to form a third annular gap; When the fourth ring is inserted into the second annular gap, the fifth ring can be inserted into the third annular gap, and the outer peripheral sidewall of the fifth ring and the inner peripheral sidewall of the third sleeve are sealed and abutted in an interference fit.

[0010] Furthermore, the outer peripheral sidewalls of the fourth ring body and / or the fifth ring body are conical sidewalls, and the diameter of the conical sidewalls gradually increases from one end toward the second end cap to the other end.

[0011] Furthermore, the dust plug also includes a connecting portion, which is mounted on the housing of the electrical connector, with one end of the connecting portion connected to the first end cap and the other end of the connecting portion connected to the second end cap.

[0012] Furthermore, the first dustproof part, the second dustproof part, and the connecting part are all TPU structural components; Both the first sealing ring and the second sealing ring are fluorosilicone rubber sealing rings.

[0013] Furthermore, the first dustproof part, the second dustproof part, and the connecting part are formed into a single piece by integral processing. The first sealing ring is integrally formed onto the first ring body by two-color injection molding; or the first sealing groove is provided on both the inner and outer sides of the first ring body so that the first sealing ring can be installed on the inner and outer sides of the first ring body respectively. And / or, the second sealing ring is integrally formed onto the fourth ring body by two-color injection molding; or, the fourth ring body is provided with a second sealing groove on both the inner and outer sides, so as to install the second sealing ring on the inner and outer sides of the fourth ring body respectively.

[0014] Furthermore, the dust plug has an antistatic silicone coating on the side of its surface facing the electrical connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The dust plug provided by this utility model includes a first dustproof part, which includes a first end cap. A first ring body is formed on one side of the first end cap. A first sealing ring is provided on the first ring body, and the first sealing ring is a star-shaped sealing ring, so that the first sealing ring forms an inner lip on the inner side of the first ring body and an outer lip on the outer side of the first ring body.

[0016] The first dustproof part is used at the first electrical connector base of the electrical connector. The first electrical connector base includes a first contact for realizing electrical connection, and also includes a first sleeve. The first sleeve is coaxially wrapped around the outside of the first contact, so that a first annular gap is formed between the first contact and the first sleeve. When the first dustproof part is in use, the first ring can be fitted into the first annular gap, so that the first end cap is placed on the first electrical connector base, and the first ring is sealed against the outer peripheral sidewall of the first contact through the inner lip of the first sealing ring, and simultaneously sealed against the inner peripheral sidewall of the first sleeve through the outer lip of the first sealing ring. This allows the first dustproof sealing cover to be installed on the first electrical connector to prevent dust from entering the first contact and causing short circuits or failures. Simultaneously, by providing a star-shaped first sealing ring on the first ring body, when the sealing gap between the first sealing ring and the first contact, and the sealing gap between the first sealing ring and the first sleeve, changes due to the insertion or removal of the first dustproof part or external vibration, the adaptive deformation of the inner and outer lips of the first sealing ring can provide static and dynamic compensation for the changes in the sealing gap, ensuring that the sealing gap is always filled, thereby effectively improving the sealing performance of the dust plug. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram showing the separation of the dust plug and the electrical connector provided in an embodiment of this utility model; Figure 2 A three-dimensional structural diagram of the dust plug provided in an embodiment of this utility model; Figure 3 A cross-sectional schematic diagram of the first dustproof part of the dust plug provided in an embodiment of this utility model; Figure 4 A cross-sectional schematic diagram of the first electrical connector base of the electrical connector provided in an embodiment of the present utility model; Figure 5 A cross-sectional schematic diagram of the second dustproof part of the dust plug provided in an embodiment of this utility model; Figure 6 A cross-sectional schematic diagram of the second electrical connector of the electrical connector provided in an embodiment of this utility model.

[0019] Figure label: 1-Electrical connector, 11-First electrical connector base, 111-First contact, 112-First sleeve, 113-First annular gap, 114-Fixed base, 115-Slot, 12-Second electrical connector base, 121-Second contact, 122-Second sleeve, 123-Third sleeve, 124-Second annular gap, 125-Third annular gap, 13-Housing, 2-Dust plug, 21-First dustproof part, 211-First end cap, 212-First ring body, 213-Second ring body, 214-Third ring body, 215-Hook, 216-First sealing ring, 22-Second dustproof part, 221-Second end cap, 222-Fourth ring body, 223-Fifth ring body, 224-Second sealing ring, 23-Connecting part. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0021] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following reference Figures 1 to 6 The dust plug is described according to some embodiments of this application.

[0026] This application provides a dust plug 2 for use with an electrical connector 1.

[0027] like Figures 1 to 3 As shown, the dust plug 2 includes a first dustproof part 21, the first dustproof part 21 includes a first end cap 211, a first annular body 212 is formed on one side of the first end cap 211, a first sealing ring 216 is provided on the first annular body 212, and the first sealing ring 216 is a star-shaped sealing ring, so that the first sealing ring 216 forms an inner lip on the inner side of the first annular body 212, and an outer lip on the outer side of the first annular body 212.

[0028] like Figure 1 and Figure 4 As shown, the electrical connector 1 includes a first electrical connector 11, for example, the first electrical connector 11 is a discharge seat for discharging a battery pack; the first electrical connector 11 includes a first contact 111 for realizing electrical connection, and the first electrical connector 11 also includes a first sleeve 112, the first sleeve 112 is coaxially wrapped around the outside of the first contact 111, so that a first annular gap 113 is formed between the first contact 111 and the first sleeve 112.

[0029] The first dustproof part 21 is used at the first electrical connection socket 11, and in use, it is combined with... Figure 3 and Figure 4 As shown, the first ring body 212 can be adapted to be inserted into the first annular gap 113, so that the first end cap 211 covers the first electrical connector 11, and the first ring body 212 is sealed against the outer peripheral side wall of the first contact member 111 through the inner lip of the first sealing ring 216, while the first ring body 212 is sealed against the inner peripheral side wall of the first sleeve 112 through the outer lip of the first sealing ring 216. This allows the first dustproof part 21 to be sealed on the first electrical connector 11, thus preventing dust and foreign objects from entering the first contact 111 and causing short circuits or failures in the first electrical connector 11. At the same time, by setting a star-shaped first sealing ring 216 on the first ring body 212, when the sealing gap between the first sealing ring 216 and the first contact 111, and the sealing gap between the first sealing ring 216 and the first sleeve 112 changes due to the insertion or removal of the first dustproof part 21 or external vibration, the adaptive deformation of the inner and outer lips of the first sealing ring 216 can be used to statically and dynamically compensate for the change in the sealing gap, so that the sealing gap is always filled, thereby effectively improving the sealing performance of the dust plug 2.

[0030] In this embodiment, preferably, combined with Figure 3 and Figure 4 As shown, a second ring 213 is also formed on the first end cap 211. The second ring 213 and the first ring 212 are located on the same side of the first end cap 211, and the second ring 213 is coaxially wrapped around the outside of the first ring 212. When the first ring 212 is inserted into the first annular gap 113 of the first electrical connector 11, the second ring 213 can be sleeved on the outside of the first sleeve 112, and the inner peripheral sidewall of the second ring 213 and the outer peripheral sidewall of the first sleeve 112 are radially tightly attached in an interference fit to form a sealing structure. Thus, through the cooperation between the second ring 213 and the first sleeve 112, the sealing performance of the first dustproof part 21 of the dust plug 2 is further improved, and the assembly stability of the first dustproof part 21 of the dust plug 2 on the first electrical connector 11 is improved.

[0031] In this embodiment, preferably, combined with Figure 3 and Figure 4As shown, a third ring body 214 is also formed on the first end cap 211. The third ring body 214 and the first ring body 212 are located on the same side of the first end cap 211, and the third ring body 214 is coaxially surrounding the outside of the second ring body 213. A plurality of hooks 215 are formed at the end of the third ring body 214 away from the first end cap 211. The plurality of hooks 215 are evenly spaced along the circumference of the first ring body 212. The first electrical connector 11 is formed with a fixing seat 114. The fixing seat 114 is arranged around the first sleeve 112, and the fixing seat 114 is provided with a plurality of slots 115. The plurality of slots 115 are evenly spaced along the circumference of the fixing seat 114. When the first dustproof part 21 is placed on the first electrical connector 11, the multiple hooks 215 of the third ring body 214 can be locked into the multiple slots 115 of the fixing seat 114 one by one, thereby improving the installation stability of the first dustproof part 21 on the first electrical connector 11, and also making the first ring body 212 stably inserted into the first ring gap 113 to achieve a good dustproof effect.

[0032] In one embodiment of this application, preferably, as shown below, Figure 1 and Figure 2 As shown, the electrical connector 1 also includes a second electrical connector 12, for example, a charging socket for charging a battery pack. Correspondingly, the dust plug 2 also includes a second dustproof part 22 for preventing dust from entering the second electrical connector 12.

[0033] In this embodiment, such as Figure 5 As shown, the second dustproof part 22 includes a second end cap 221. A fourth ring body 222 is formed on one side of the second end cap 221. A second sealing ring 224 is provided on the fourth ring body 222. The second sealing ring 224 is the same as the first sealing ring 216 and is also a star-shaped sealing ring. The second sealing ring 224 forms an inner lip on the inner side of the fourth ring body 222 and an outer lip on the outer side of the fourth ring body 222.

[0034] like Figure 6 As shown, the second electrical connector 1 includes a second contact 121 for realizing electrical connection, and also includes a second sleeve 122, which is coaxially surrounding the outside of the second contact 121, such that a second annular gap 124 is formed between the second contact 121 and the second sleeve 122.

[0035] When the second dustproof part 22 is used at the second electrical connection socket 12, it is combined with Figure 5 and Figure 6As shown, the fourth ring 222 can be fitted into the second annular gap 124, allowing the second end cap 221 to cover the second electrical connector 12. The fourth ring 222 seals against the outer peripheral wall of the second contact 121 via the inner lip of the second sealing ring 224, and simultaneously seals against the inner peripheral wall of the second sleeve 122 via the outer lip of the second sealing ring 224. This allows the second dustproof part 22 to seal onto the second electrical connector 12, preventing dust and foreign matter from entering the second contact 121 and causing short circuits or failures in the second electrical connector 12. Meanwhile, by setting a star-shaped second sealing ring 224 on the fourth ring body 222, when the sealing gap between the second sealing ring 224 and the second contact member 121, and the sealing gap between the second sealing ring 224 and the second sleeve 122 change due to the insertion and removal of the second dustproof part 22 or external vibration, the adaptive deformation of the inner and outer lips of the second sealing ring 224 can be used to statically and dynamically compensate for the change in the sealing gap, so that the sealing gap is always filled, thereby effectively improving the sealing performance of the dust plug 2.

[0036] In one embodiment of this application, preferably, in combination with Figure 5 and Figure 6 As shown, the second electrical connector 12 also has a third sleeve 123, which is coaxially wrapped around the outside of the second sleeve 122, so that a third annular gap 125 is formed between the third sleeve 123 and the second sleeve 122.

[0037] Correspondingly, the second dustproof part 22 also includes a fifth ring 223 formed on the second end cap 221. The fifth ring 223 and the fourth ring 222 are located on the same side of the second end cap 221, and the fifth ring 223 is coaxially surrounding the outside of the fourth ring 222. When the fourth ring 222 is inserted into the second annular gap 124 of the second electrical connector 12, the fifth ring 223 can be inserted into the third annular gap 125, and the outer peripheral sidewall of the fifth ring 223 and the inner peripheral sidewall of the third sleeve 123 are sealed and abutted in an interference fit to form a sealing structure, thereby improving the sealing and dustproof performance of the second dustproof part 22 on the second electrical connector 12 to a certain extent, and also improving the installation stability of the second dustproof part 22 on the second electrical connector 12 to a certain extent.

[0038] In this embodiment, preferably, as follows: Figure 5 As shown, the outer peripheral sidewall of the fourth ring body 222 is a conical sidewall. The diameter of the conical sidewall gradually expands from one end near the second end cap 221 to the other end, thereby improving the sealing performance between the fourth ring body 222 and the second sleeve 122 to a certain extent, and also improving the stability of the fourth ring body 222 when inserted into the second annular gap 124 to a certain extent.

[0039] In this embodiment, preferably, as follows: Figure 5 As shown, the outer peripheral sidewall of the fifth ring body 223 is a conical sidewall. The diameter of the conical sidewall gradually expands from one end near the second end cap 221 to the other end, thereby improving the sealing performance between the fifth ring body 223 and the third sleeve 123 to a certain extent, and also improving the stability of the fifth ring body 223 when inserted into the third annular gap 125 to a certain extent.

[0040] In one embodiment of this application, preferably, as shown below, Figure 1 and Figure 2 As shown, the dust plug 2 also includes a connecting portion 23. One end of the connecting portion 23 is connected to the first end cap 211, and the other end of the connecting portion 23 is connected to the second end cap 221. The connecting portion 23 can be installed on the housing 13 of the electrical connector 1, for example, the connecting portion 23 can be detachably installed on the housing 13 of the electrical connector 1 by fasteners. Thus, the first dustproof portion 21 and the second dustproof portion 22 are connected together by the connecting portion 23, and the first dustproof portion 21 and the second dustproof portion 22 are connected to the housing 13 of the electrical connector 1, preventing them from being lost.

[0041] In this embodiment, preferably, the first dustproof part 21, the second dustproof part 22, and the connecting part 23 are all made of TPU (thermoplastic polyurethane). The first sealing ring 216 and the second sealing ring 224 are both fluorosilicone rubber sealing rings. This makes the dust plug 2 less prone to aging and deformation, extending its service life.

[0042] In this embodiment, preferably, the first dustproof part 21, the second dustproof part 22 and the connecting part 23 are formed into a single piece by integral processing, thereby reducing processing costs and processing cycle to a certain extent.

[0043] In this embodiment, preferably, as follows: Figure 3 As shown, the first sealing ring 216 and the first ring body 212 are integrally formed by two-color injection molding, so that the inner lip of the first sealing ring 216 protrudes from the inner side of the first ring body 212 to seal against the first contact member 111, and the outer lip of the first sealing ring 216 protrudes from the outer side of the first ring body 212 to seal against the first sleeve 112.

[0044] Alternatively, a first sealing groove is provided on both the inner and outer sides of the first ring body 212, so that a first sealing ring 216 can be installed on the inner and outer sides of the first ring body 212 respectively, so that the first ring body 212 seals against the first contact member 111 through the first sealing ring 216 on its inner side, and seals against the first sleeve 112 through the first sealing ring 216 on its outer side.

[0045] In this embodiment, preferably, as follows: Figure 5As shown, the second sealing ring 224 and the fourth ring body 222 are integrally formed by two-color injection molding, so that the inner lip of the second sealing ring 224 protrudes from the inner side of the fourth ring body 222 to seal against the second contact member 121, and the outer lip of the second sealing ring 224 protrudes from the outer side of the fourth ring body 222 to seal against the second sleeve 122.

[0046] Alternatively, a second sealing groove is provided on both the inner and outer sides of the fourth ring body 222, so that a second sealing ring 224 can be installed on the inner and outer sides of the fourth ring body 222 respectively, so that the fourth ring body 222 seals against the second contact member 121 through the second sealing ring 224 on its inner side, and seals against the second sleeve 122 through the second sealing ring 224 on its outer side.

[0047] In this embodiment, preferably, the surface of the dust plug 2 facing the electrical connector 1 is provided with an antistatic silicone coating, thereby preventing the electrical connector 1 from short-circuiting due to the dust plug 2 attracting dust due to static electricity.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dust plug, characterized in that, Including the first dustproof section; The first dustproof part includes a first end cap, a first ring is formed on one side of the first end cap, and a first sealing ring is provided on the first ring, which is a star-shaped sealing ring. The first dustproof part is used for the first electrical connector base of the electrical connector. The first electrical connector base includes a first contact and a first sleeve. The first sleeve is disposed around the outside of the first contact to form a first annular gap. The first ring body can be adapted to be inserted into the first ring gap, and the first ring body is sealed against the outer peripheral sidewall of the first contact member through the inner lip of the first sealing ring, and the first ring body is sealed against the inner peripheral sidewall of the first sleeve through the outer lip of the first sealing ring.

2. The dust plug according to claim 1, characterized in that, A second ring is also formed on the first end cap, and the second ring is arranged around the outside of the first ring. When the first ring body is inserted into the first annular gap, the second ring body is sleeved on the outside of the first sleeve, and the inner peripheral sidewall of the second ring body and the outer peripheral sidewall of the first sleeve are sealed and abutted in an interference fit.

3. The dust plug according to claim 2, characterized in that, A third ring body is also formed on the first end cap. The third ring body is arranged around the outside of the second ring body. The third ring body is provided with a plurality of hooks, which are spaced apart along the circumference of the third ring body. The first electrical connector is formed around the first sleeve to form a connector seat. The connector seat is provided with a plurality of slots spaced apart circumferentially, and the plurality of hooks can be engaged in the plurality of slots one by one.

4. The dust plug according to claim 1, characterized in that, The dust plug also includes a second dustproof part, which includes a second end cap. A fourth ring is formed on one side of the second end cap, and a second sealing ring is provided on the fourth ring. The second sealing ring is a star-shaped sealing ring. The second dustproof part is used for the second electrical connector base of the electrical connector. The second electrical connector base includes a second contact and a second sleeve. The second sleeve is disposed around the outside of the second contact to form a second annular gap. The fourth ring can be adapted to be inserted into the second ring gap, and the fourth ring is sealed against the outer peripheral sidewall of the second contact member through the inner lip of the second sealing ring, and the fourth ring is sealed against the inner peripheral sidewall of the second sleeve through the outer lip of the second sealing ring.

5. The dust plug according to claim 4, characterized in that, A fifth ring is also formed on the second end cap, and the fifth ring is arranged around the outside of the fourth ring; The second electrical connector has a third sleeve that surrounds the outside of the second sleeve to form a third annular gap; When the fourth ring is inserted into the second annular gap, the fifth ring can be inserted into the third annular gap, and the outer peripheral sidewall of the fifth ring and the inner peripheral sidewall of the third sleeve are sealed and abutted in an interference fit.

6. The dust plug according to claim 5, characterized in that, The outer peripheral sidewalls of the fourth ring and / or the fifth ring are tapered sidewalls, and the diameter of the tapered sidewalls gradually increases from one end toward the second end cap to the other end.

7. The dust plug according to claim 4, characterized in that, The dust plug also includes a connecting portion, which is mounted on the housing of the electrical connector. One end of the connecting portion is connected to the first end cap, and the other end of the connecting portion is connected to the second end cap.

8. The dust plug according to claim 7, characterized in that, The first dustproof part, the second dustproof part, and the connecting part are all TPU structural components; Both the first sealing ring and the second sealing ring are fluorosilicone rubber sealing rings.

9. The dust plug according to claim 7, characterized in that, The first dustproof part, the second dustproof part, and the connecting part are formed into a single piece by integral processing. The first sealing ring is integrally formed onto the first ring body by two-color injection molding; or the first sealing groove is provided on both the inner and outer sides of the first ring body so that the first sealing ring can be installed on the inner and outer sides of the first ring body respectively. And / or, The second sealing ring is integrally formed onto the fourth ring body by two-color injection molding; or, the fourth ring body is provided with a second sealing groove on both the inner and outer sides, so that the second sealing ring can be installed on the inner and outer sides of the fourth ring body respectively.

10. The dust plug according to claim 1, characterized in that, The dust plug has an antistatic silicone coating on the side facing the electrical connector.

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