Charging gun plastic plug with embedded antistatic coating

Abstract

The utility model discloses a charging gun plastic plug of embedded antistatic coating, including plastic plug body, its inside is equipped with the plug pin installation cavity along the axial extension, plug pin subassembly, its adaptation embedded in the plug pin installation cavity, embedded antistatic coating, embedded antistatic coating integrated on the inner wall of plug pin installation cavity, and its side away from the inner wall of plug pin installation cavity and the outer wall of insulating sleeve closely adhere, wherein, the inner wall of wiring holder is equipped with antistatic electronic coating. This charging gun plastic plug of embedded antistatic coating can effectively adapt to the demand of new energy automobile charging scene. In static protection, through embedded composite antistatic coating and wiring holder antistatic electronic coating conduction, the reinforced rib inner conductive silica gel forms a global antistatic path, which can quickly dredge the static generated by plug-in friction and cable shaking, eliminate the risk of static breakdown or interference, and ensure high-voltage fast charging safety.

Description

Technical Field

[0001] This utility model relates to the field of charging gun technology, specifically to a charging gun plastic plug with an embedded antistatic coating. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the safety, reliability, and durability of the plastic plug of the charging gun, as a core charging component, have become critical requirements. Existing charging gun plastic plugs have significant shortcomings in practical applications: They pose a significant static electricity hazard; friction between the pins and the insulating sleeve, as well as cable movement during insertion and removal, easily generate static electricity. Traditional structures lack a comprehensive anti-static design, and static electricity accumulation can easily lead to short circuits, arcing, or interference with the charging control system, especially in high-voltage fast charging scenarios where the safety risks are even higher. Structural stability is poor; some plug bodies and terminals use a spliced ​​design, which can easily lead to structural loosening or static electricity retention due to gaps. Furthermore, the pin assembly is prone to axial movement, affecting the reliability of current transmission contact. Durability and user experience are insufficient; the body has weak bending resistance, and long-term insertion and removal can easily cause the anti-static coating to peel off. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a charging gun plastic plug with an embedded antistatic coating, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A charging gun plastic plug with an embedded antistatic coating includes:

[0006] The plastic plug body has an axially extending pin mounting cavity inside. The front end of the plastic plug body has a pin outlet communicating with the pin mounting cavity, and the rear end has a terminal block for connecting with the charging gun cable. The terminal block is integrally injection molded with the plastic plug body.

[0007] A pin assembly is adapted to be embedded in the pin mounting cavity. The pin assembly includes at least two conductive pins and an insulating sleeve wrapped around the periphery of each conductive pin. The front end of the conductive pin passes through the pin outlet and extends out of the plastic plug body.

[0008] An embedded antistatic coating is integrally formed on the inner wall of the pin mounting cavity, and the side of the coating away from the inner wall of the pin mounting cavity is tightly fitted to the outer wall of the insulating sleeve.

[0009] The inner wall of the terminal block is provided with an antistatic coating, which is in communication with the embedded antistatic coating.

[0010] As a further description of the above technical solution, the embedded antistatic coating is a composite coating, comprising an anchoring base layer, an antistatic functional layer, and a wear-resistant surface layer stacked in sequence, wherein the wear-resistant surface layer slides and adheres to the outer wall of the insulating sleeve.

[0011] As a further description of the above technical solution, the anchoring base layer is a modified epoxy resin layer with a thickness of 0.01-0.03mm, which is bonded to the inner wall of the pin mounting cavity by injection molding, and the inner wall of the anchoring base layer is provided with several uniformly distributed micro-protrusions.

[0012] The antistatic functional layer is a polyurethane resin layer doped with carbon nanotubes, with a thickness of 0.03-0.15 mm, which covers the inner side of the anchoring base layer, and the micro-protrusions are embedded in the antistatic functional layer to enhance the bonding strength between the two.

[0013] The wear-resistant surface layer is a polytetrafluoroethylene modified layer with a thickness of 0.01-0.02 mm, covering the inner side of the antistatic functional layer.

[0014] As a further description of the above technical solution, the plastic plug body has 3-4 inclined reinforcing ribs on both sides, and each reinforcing rib is integrally formed with the plastic plug body.

[0015] As a further description of the above technical solution, the interior of the reinforcing rib is provided with an antistatic conductive groove extending along its length. The antistatic conductive groove is filled with conductive silicone. One end of the conductive silicone is connected to the embedded antistatic coating, and the other end is connected to the antistatic coating on the inner wall of the terminal block to form a full-area antistatic conductive path.

[0016] As a further description of the above technical solution, the outer wall of the insulating sleeve is provided with an annular groove extending circumferentially thereon, and the side of the embedded antistatic coating away from the inner wall of the pin mounting cavity is provided with an annular boss that matches the annular groove. The annular boss is embedded in the annular groove to limit the axial movement of the pin assembly in the pin mounting cavity.

[0017] As a further description of the above technical solution, the outer wall of the reinforcing rib is provided with anti-slip texture, which is an oblique stripe extending along the length of the reinforcing rib, and the outer wall of the plastic plug body between two adjacent reinforcing ribs is provided with heat dissipation groove.

[0018] As a further description of the above technical solution, the inner wall of the terminal block is provided with a plurality of cable slots for positioning the charging gun cable. The cable slots are evenly distributed along the circumference of the terminal block, and the inner wall of each cable slot is provided with an electrostatic film, which is attached to the insulating outer sheath of the charging gun cable.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The charging gun plastic plug with an embedded antistatic coating of this utility model has at least one of the following beneficial effects during use:

[0021] This charging gun's plastic plug, with its embedded antistatic coating, effectively meets the charging needs of new energy vehicles. For electrostatic protection, the embedded composite antistatic coating and the terminal block's antistatic coating are interconnected, and the conductive silicone within the reinforcing ribs forms a comprehensive antistatic path. This quickly dissipates static electricity generated by insertion / removal friction and cable movement, eliminating the risk of electrostatic breakdown or interference and ensuring safe high-voltage fast charging. In terms of structural reliability, the plastic plug body and terminal block are integrally injection molded, preventing loosening and static electricity retention caused by gaps. The annular boss and groove fit together to limit pin axial movement, and the cable slot secures the cable, ensuring stable current transmission contact. Regarding durability and user experience, the reinforcing ribs enhance the body's bending resistance, the wear-resistant surface layer in the composite coating reduces insertion / removal losses, and the heat dissipation grooves accelerate heat dissipation to prevent component aging. The anti-slip texture on the outer wall of the reinforcing ribs facilitates gripping and insertion / removal when wet or wearing gloves. Overall, this significantly improves the charging gun plug's safety performance, lifespan, and ease of use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a charging gun plastic plug with an embedded antistatic coating according to the present invention.

[0023] Figure 2 This is a side view of the plastic plug for a charging gun with an embedded antistatic coating, according to the present invention.

[0024] Figure 3 This is a schematic diagram of the end structure of a charging gun plastic plug with an embedded antistatic coating according to the present invention.

[0025] Figure 4 This is a cross-sectional structural diagram of a charging gun plastic plug with an embedded antistatic coating according to the present invention.

[0026] Numbering on the map:

[0027] 1. Plastic plug body; 101. Terminal block; 102. Antistatic coating; 103. Cable slot; 104. Static film; 105. Pin mounting cavity; 106. Antistatic conductive groove; 107. Heat dissipation groove; 108. Reinforcing rib; 2. Pin assembly; 201. Conductive pin; 202. Insulating sleeve; 203. Embedded antistatic coating; 204. Annular groove; 205. Annular boss. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-4 As shown, this utility model provides a charging gun plastic plug with an embedded antistatic coating 203, comprising:

[0030] The plastic plug body 1 has a pin mounting cavity 105 extending axially inside. The front end of the plastic plug body 1 has a pin outlet communicating with the pin mounting cavity 105, and the rear end has a terminal block 101 for connecting with the charging gun cable. The terminal block 101 is integrally injection molded with the plastic plug body 1.

[0031] The plastic plug body 1 has an axially extending "pin mounting cavity 105" inside, a "pin outlet" at the front end (for the pin to extend out), and a "terminal 101" at the rear end (for connecting the charging gun cable); the two are integrally injection molded to avoid structural loosening or static electricity accumulation caused by splicing gaps, while providing a complete channel for current transmission "from cable → terminal 101 → pin".

[0032] The pin assembly 2 is adapted to be embedded in the pin mounting cavity 105. The pin assembly 2 includes at least two conductive pins 201 and an insulating sleeve 202 wrapped around the outer periphery of each conductive pin 201. The front end of the conductive pin 201 passes through the pin outlet and extends out of the plastic plug body 1.

[0033] The pin assembly 2 (at least two conductive pins 201 + an insulating sleeve 202 around each pin) is embedded in the pin mounting cavity 105. The front end of the pin extends out of the body through the pin outlet (for docking with the charging interface), while the insulating sleeve 202 isolates adjacent pins to prevent short circuits. The presence of the insulating sleeve 202 ensures electrical safety and also provides a "contact carrier" for the subsequent application of the antistatic coating.

[0034] An embedded antistatic coating 203 is integrally formed on the inner wall of the pin mounting cavity 105, and the side of the antistatic coating 203 away from the inner wall of the pin mounting cavity 105 is tightly attached to the outer wall of the insulating sleeve 202.

[0035] The inner wall of the terminal block 101 is provided with an antistatic coating 102, which is in communication with the embedded antistatic coating 203.

[0036] This embodiment utilizes a multi-layered antistatic structure to rapidly conduct static electricity generated at various parts of the plug (such as frictional static electricity and accumulated static electricity) away (ultimately grounded through the charging gun housing), preventing electrostatic breakdown or interference. The embedded antistatic coating 203 is not a single structure but a composite coating (anchoring base layer + antistatic functional layer + wear-resistant surface layer). The "antistatic coating 102" on the inner wall of the connector 101 is directly connected to the embedded antistatic coating 203, forming a static electricity conduction channel from the "pin area to the connector 101 area".

[0037] Furthermore, the embedded antistatic coating 203 is a composite coating, comprising an anchoring base layer, an antistatic functional layer, and a wear-resistant surface layer stacked sequentially, wherein the wear-resistant surface layer slides and adheres to the outer wall of the insulating sleeve 202.

[0038] Anchoring base layer (modified epoxy resin layer, 0.01-0.03mm): It is tightly bonded to the inner wall of the pin mounting cavity 105 through injection molding. The "uniform micro-protrusions" on the inner wall are embedded in the subsequent antistatic functional layer, which greatly improves the bonding strength between the coating and the body and prevents the coating from falling off due to long-term insertion and removal. Its function is to "fix the coating and transfer static electricity".

[0039] Antistatic functional layer (carbon nanotube-doped polyurethane resin layer, 0.03-0.15mm): Carbon nanotubes have excellent conductivity and are the "static conductivity core" of the coating; this layer covers the inner side of the anchoring base layer and is directly attached to the outer wall of the insulating sleeve 202. When the pin and the insulating sleeve 202 generate static electricity due to insertion and withdrawal friction, the static electricity will be transferred through the outer wall of the insulating sleeve 202 to the antistatic functional layer, and then conducted to the subsequent structure through the anchoring base layer.

[0040] Wear-resistant surface layer (PTFE modified layer, 0.01-0.02mm): Covers the inner side of the antistatic functional layer and slides directly against the outer wall of the insulating sleeve 202; the low friction and high wear resistance of PTFE can reduce the friction loss when the pin assembly 2 is inserted and removed, which not only protects the antistatic functional layer from wear, but also extends the service life of the insulating sleeve 202.

[0041] Furthermore, the anchoring base layer is a modified epoxy resin layer with a thickness of 0.01-0.03 mm. It is bonded to the inner wall of the pin mounting cavity 105 by injection molding. The inner wall of the anchoring base layer is provided with several evenly distributed micro-protrusions.

[0042] The antistatic functional layer is a polyurethane resin layer doped with carbon nanotubes, with a thickness of 0.03-0.15 mm, which covers the inner side of the anchoring base layer, and the micro-protrusions are embedded in the antistatic functional layer to enhance the bonding strength between the two.

[0043] The wear-resistant surface layer is a polytetrafluoroethylene modified layer with a thickness of 0.01-0.02 mm, covering the inner side of the antistatic functional layer.

[0044] When the charging gun cable is connected to the terminal block 101, the cable insulation sheath may generate static electricity due to shaking. The antistatic coating 102 can directly conduct the static electricity in this area. At the same time, its conductivity with the embedded coating ensures that the static electricity in the pin area can be transferred to the terminal block 101, avoiding the accumulation of local static electricity.

[0045] Furthermore, the plastic plug body 1 has 3-4 inclined reinforcing ribs 108 on both sides, and each reinforcing rib 108 is integrally formed with the plastic plug body 1.

[0046] The plastic plug body 1 has 3-4 inclined reinforcing ribs 108 on both sides, integrally molded with the body; this greatly improves the body's resistance to bending and impact, preventing breakage during plugging and unplugging (especially for frequently used charging scenarios). The outer wall of the reinforcing ribs 108 has "diagonal anti-slip texture along the length direction", increasing the friction between the hand and the plug, allowing for stable gripping and plugging even with wet hands or while wearing gloves, reducing the risk of operational errors.

[0047] Furthermore, the reinforcing rib 108 has an antistatic conductive groove 106 extending along its length inside. The antistatic conductive groove 106 is filled with conductive silicone. One end of the conductive silicone is connected to the embedded antistatic coating 203, and the other end is connected to the antistatic coating 102 on the inner wall of the terminal block 101 to form a full-area antistatic conductive path.

[0048] One end of the conductive silicone is connected to the "embedded antistatic coating 203", and the other end is connected to the "antistatic coating 102 of the terminal block 101", forming a closed-loop conduction path of "pin mounting cavity 105 → reinforcing rib 108 → terminal block 101"; even if static electricity accumulates on the edge of the plastic body, it can be guided into the main path through the conductive silicone to achieve "antistatic protection without dead angles".

[0049] Furthermore, the outer wall of the insulating sleeve 202 is provided with an annular groove 204 extending circumferentially therein, and the side of the embedded antistatic coating 203 away from the inner wall of the pin mounting cavity 105 is provided with an annular boss 205 that is adapted to the annular groove 204. The annular boss 205 is embedded in the annular groove 204 to restrict the axial movement of the pin assembly 2 in the pin mounting cavity 105.

[0050] The outer wall of the insulating sleeve 202 is provided with an "annular groove 204", and the corresponding position of the embedded antistatic coating 203 is provided with an "annular boss 205". After the boss is embedded in the groove, it can strictly limit the "axial movement" of the pin assembly 2 in the pin mounting cavity 105, ensuring that the pin extension length is stable and the contact with the charging interface is always reliable.

[0051] Furthermore, the outer wall of the reinforcing rib 108 is provided with anti-slip texture, which is a diagonal stripe extending along the length of the reinforcing rib 108, and the outer wall of the plastic plug body 1 between two adjacent reinforcing ribs 108 is provided with heat dissipation groove 107.

[0052] During charging, the conductive pin 201 will generate heat due to the current passing through it. The heat dissipation groove 107 can accelerate air circulation and dissipate the heat quickly, preventing the internal temperature of the plug from becoming too high, which may cause the insulation layer to age, the antistatic coating to fail, or cause safety hazards.

[0053] Furthermore, the inner wall of the terminal block 101 is provided with a plurality of cable slots 103 for positioning the charging gun cable. The cable slots 103 are evenly distributed along the circumference of the terminal block 101, and the inner wall of each cable slot 103 is provided with an electrostatic film 104, which is attached to the insulating outer sheath of the charging gun cable.

[0054] The inner wall of the connector 101 is provided with a “circumferentially evenly distributed cable slot 103”, which can fix the charging gun cable in a precise position and prevent the cable from becoming loose due to pulling or shaking; at the same time, the “static film 104” on the inner wall of the slot is attached to the cable insulation sheath, which can further conduct static electricity on the surface of the cable and supplement the antistatic effect.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A charging gun plastic plug with an embedded antistatic coating, characterized in that, include: The plastic plug body has an axially extending pin mounting cavity inside. The front end of the plastic plug body has a pin outlet communicating with the pin mounting cavity, and the rear end has a terminal block for connecting with the charging gun cable. The terminal block is integrally injection molded with the plastic plug body. A pin assembly is adapted to be embedded in the pin mounting cavity. The pin assembly includes at least two conductive pins and an insulating sleeve wrapped around the periphery of each conductive pin. The front end of the conductive pin passes through the pin outlet and extends out of the plastic plug body. An embedded antistatic coating is integrally formed on the inner wall of the pin mounting cavity, and the side of the coating away from the inner wall of the pin mounting cavity is tightly fitted to the outer wall of the insulating sleeve. The inner wall of the terminal block is provided with an antistatic coating, which is in communication with the embedded antistatic coating.

2. The charging gun plastic plug with an embedded antistatic coating according to claim 1, characterized in that: The embedded antistatic coating is a composite coating, comprising an anchoring base layer, an antistatic functional layer, and a wear-resistant surface layer stacked in sequence, wherein the wear-resistant surface layer slides and adheres to the outer wall of the insulating sleeve.

3. The charging gun plastic plug with an embedded antistatic coating according to claim 2, characterized in that: The anchoring base layer is a modified epoxy resin layer with a thickness of 0.01-0.03mm. It is bonded to the inner wall of the pin mounting cavity by injection molding. The inner wall of the anchoring base layer is provided with several evenly distributed micro-protrusions. The antistatic functional layer is a polyurethane resin layer doped with carbon nanotubes, with a thickness of 0.03-0.15 mm, which covers the inner side of the anchoring base layer, and the micro-protrusions are embedded in the antistatic functional layer to enhance the bonding strength between the two. The wear-resistant surface layer is a polytetrafluoroethylene modified layer with a thickness of 0.01-0.02 mm, covering the inner side of the antistatic functional layer.

4. The charging gun plastic plug with an embedded antistatic coating according to claim 1, characterized in that: The plastic plug body has 3-4 inclined reinforcing ribs on both sides, and each reinforcing rib is integrally formed with the plastic plug body.

5. A charging gun plastic plug with an embedded antistatic coating according to claim 4, characterized in that: The reinforcing rib has an antistatic conductive groove extending along its length inside. The antistatic conductive groove is filled with conductive silicone. One end of the conductive silicone is connected to the embedded antistatic coating, and the other end is connected to the antistatic coating on the inner wall of the terminal block to form a full-area antistatic conductive path.

6. The charging gun plastic plug with an embedded antistatic coating according to claim 1, characterized in that: The outer wall of the insulating sleeve is provided with an annular groove extending circumferentially thereon. The side of the embedded antistatic coating away from the inner wall of the pin mounting cavity is provided with an annular boss that matches the annular groove. The annular boss is embedded in the annular groove to restrict the axial movement of the pin assembly in the pin mounting cavity.

7. A charging gun plastic plug with an embedded antistatic coating according to claim 4, characterized in that: The outer wall of the reinforcing rib is provided with anti-slip texture, which is a diagonal stripe extending along the length of the reinforcing rib, and the outer wall of the plastic plug body between two adjacent reinforcing ribs is provided with heat dissipation grooves.

8. A charging gun plastic plug with an embedded antistatic coating according to claim 1, characterized in that: The inner wall of the terminal block is provided with several cable slots for positioning the charging gun cable. The cable slots are evenly distributed along the circumference of the terminal block, and the inner wall of each cable slot is provided with an electrostatic film. The electrostatic film is attached to the insulating outer sheath of the charging gun cable.

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