Special male and female connectors for electric vehicle charging extension cables

Abstract

The present invention provides a male and female connector specifically for an electric vehicle charging extension cord. The present invention achieves electrical contact integrity of the male and female joints by virtue of the ground wire plug, live wire plug, and neutral wire plug of the male connector and the ground wire socket, live wire socket, and neutral wire socket of the female connector all having circular cross-sections. Furthermore, the ground wire plug, live wire plug, and neutral wire plug of the male connector and the ground wire socket, live wire socket, and neutral wire socket of the female connector all having an asymmetrical configuration, thereby achieving foolproof male and female electrical plugging, thereby facilitating the charging and use of electric vehicles. Furthermore, the present invention is universally applicable to the charging connector sizes of electric vehicles worldwide, i.e., sharing their specifications. This also avoids the possibility of damage to charging equipment and power supply equipment caused by mis-insertion of electrical plugs of non-electric vehicles, and also avoids the risk of fire caused by electrical wiring.

Description

Technical Field

[0001] The present invention relates to a male and female connector specifically for an electric vehicle charging extension cord. The male connector has a ground, live, and neutral wire plug, and the ground, live, and neutral wire plugs of the female connector all have circular cross-sections, thereby achieving electrical contact integrity between the male and female connectors. Furthermore, the male connector has an asymmetrical configuration with the ground, live, and neutral wire plugs of the female connector, thereby achieving foolproof male and female electrical plugging, thereby facilitating the charging of electric vehicles. Furthermore, the present invention is universally applicable to the charging connector sizes of electric vehicles worldwide, i.e., shares their specifications, and avoids damage to charging equipment and power supply equipment caused by mis-insertion of electrical plugs of non-electric vehicles. Background Art

[0002] New energy vehicles have become a key development project in countries around the world in recent years, and rechargeable electric vehicles are currently the most common new energy vehicle. Rechargeable electric vehicles require charging at charging stations, charging piles, or other supporting charging facilities. The long charging times often create stress for owners, who often find themselves waiting for longer. When charging at charging stations during the day, owners often experience anxiety and stress due to busy schedules and work schedules, as well as difficulty finding a charging location and a shortage of charging poles. At night, users may return to their homes or nearby hotels to rest during the charging period. If they take too long, their electric vehicle may still occupy a charging space even though it's already fully charged, forcing the owner to pay additional parking fees. In light of this, the inventors of this case applied for a patent in Taiwan, China, with Certificate No. M543493, "An Extension Cord for Charging an Electric Vehicle," to address this issue. This patent allows owners to charge their vehicle anytime, anywhere, while errands or taking a break, reducing the anxiety and stress caused by a lack of charging stations and a lack of charging points. This application was also granted Patent Certificate No. 201621044799.5 of the People's Republic of China, Patent Certificate No. 9,744,867 of the United States, Patent Certificate No. 202017104185.9 of Germany, Patent Certificate No. 3212606 of Japan, and Patent Certificate No. U-201730880 of Spain. The aforementioned prior patents primarily comprise an extension cord body comprising an extension cord plug connected to a household electrical circuit. The extension cord plug is connected to an electromagnetic protection switch via a first extension cord. The current output of the electromagnetic protection switch is connected to an electric meter. The current output of the electric meter is connected to an extension cord socket via a second extension cord. The extension cord socket is used to connect to an electric vehicle charging plug. This application also features an electromagnetic protection function, which improves charging safety. It can also be connected to a household electrical circuit, allowing vehicle owners to charge anywhere besides charging stations or charging piles, effectively solving the problem of uneven supply of charging spaces. This application also features an electric meter, allowing users to visually count the amount of electricity used during each charge. However, the cross-section of the plug of existing charging connectors is often flat or polygonal, resulting in an incomplete electrical contact surface during charging, which can easily lead to poor charging efficiency. Furthermore, the shape of existing charging plugs is often symmetrical, lacking foolproof protection. This can easily lead to the charging connector being mistakenly plugged into a non-electric appliance, potentially damaging the charging equipment or causing a fire hazard.

[0003] In view of the above phenomenon, the most practical present invention is developed to solve the deficiencies of the prior art. Summary of the Invention

[0004] The primary purpose of this invention is to provide a male and female connector specifically designed for electric vehicle charging extension cords. This addresses the problem that existing electric vehicle charging connectors, most of which have flat or polygonal cross-sections, create incomplete electrical contact during charging, which can lead to poor charging efficiency. Furthermore, existing charging connectors are often symmetrical, lacking foolproof protection, and can easily lead to mis-insertion of conventional charging connectors with non-electric vehicle electrical plugs, potentially damaging the charging equipment and posing a fire hazard.

[0005] The technical features of the present invention for solving the problem are mainly through comprising an extension cord body, the extension cord body comprising a first extension cord, a male connector provided at the end of the first extension cord, the male connector being connected to a household circuit, wherein the household circuit is electrically provided with an input terminal, the input terminal being connected to the current output end of the main input switch in the household circuit in the power outgoing direction, the other end of the input terminal being provided with a female connector, the female connector being matched and connected to the male connector of the first extension cord; the other end of the first extension cord is connected to an electromagnetic protection switch, the current of the electromagnetic protection switch being designed to be fifty percent of the current of the household input switch, so as to The protection power supply family's original household appliances can be used normally. This design can be used comprehensively and universally, and can protect the safety of electric vehicles during charging, reduce battery loss, and do not require special high-voltage equipment, reducing the dangers of high-voltage electricity and the waste of national and personal resources. The current output end of the electromagnetic protection switch is connected to a metering meter, and the current output end of the metering meter is connected to a female connector of the same specification as the above through a second extension line. The female connector is used to connect to the electric vehicle charging gun, wherein one end of the electric vehicle charging gun is provided with a male connector of the same specification as the above, and the male connector is matched and electrically connected to the female connector connected to the second extension line. The end of the electric vehicle charging gun is provided with a female connector of the same specifications as the above-mentioned one; each of the female connectors includes a female base, the front end of the female base is provided with a ground wire socket in the form of a round hole, and the ground wire socket is adjacent to a live wire socket in the form of a round hole and a neutral wire socket in the form of a round hole on both sides, wherein the ground wire socket and the live wire socket form a first width and a first height relative to each other, and the ground wire socket and the neutral wire socket form a second width and a second height relative to each other, wherein The first width is not equal to the second width, and the first height is not equal to the second height in an asymmetric configuration; and each of the male connectors includes a male base, the front end surface of the male base is provided with a cylindrical earth wire plug, and a round hole-shaped live wire plug and a round hole-shaped neutral wire plug are adjacent to the ground wire plug on both sides, wherein the relative positions of the ground wire plug, the live wire plug and the neutral wire plug match and connect with the ground wire socket, the live wire socket and the neutral wire socket of the female connector.

[0006] With this innovative and unique design, the present invention has a household charging extension cord with a circular cross-section of the ground wire plug, live wire plug and neutral wire plug of the male connector and the ground wire socket, live wire socket and neutral wire socket of the female connector, which can achieve the electrical contact integrity of the male and female joints, thereby effectively improving the charging efficiency and enabling it to be connected to household circuits, providing car owners with the ability to charge in places other than charging stations or charging piles, effectively solving the problem of uneven supply of charging parking spaces, and the asymmetric configuration of the ground wire plug, live wire plug and neutral wire plug of the male connector and the ground wire socket, live wire socket and neutral wire socket of the female connector can achieve fool-proof male and female electrical plug-in, thereby facilitating the charging of electric vehicles. Furthermore, the present invention is applicable to the charging connector sizes of electric vehicles around the world, reducing the troubles caused to car owners by different power supply connector specifications caused by different countries. Just like the uniformity of mobile phone chargers, this eliminates the difficulties and waste of resources caused by the early disparity between brands of mobile phone chargers. By sharing specifications, it also prevents the mis-insertion of non-electric vehicle plugs, which can damage the charging equipment and power supply, as well as the risk of electrical fires. As charging vehicles become more common, using this extension cord will improve the convenience of nighttime charging and alleviate the problem of insufficient power supply from the national power grid during the day. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural diagram of the male and female connectors dedicated to the electric vehicle charging extension cable of the present invention.

[0008] Figure 2 It is a three-dimensional exploded view of the male and female connectors dedicated to the electric vehicle charging extension cable of the present invention.

[0009] Figure 3 It is a front face view of the female connector of the present invention.

[0010] Figure 4 It is a cross-sectional view of the female connector of the present invention.

[0011] Figure 5 It is a front face view of the male connector of the present invention.

[0012] Figure 6 It is a cross-sectional view of the male connector of the present invention.

[0013] Figure 7 It is a cross-sectional view of the male and female connectors of the present invention in an exploded state.

[0014] Figure 8 It is a cross-sectional view of the combined state of the male and female connectors of the present invention.

[0015] Figure 9 It is a longitudinal sectional view of the assembled state of the male and female connectors of the present invention.

[0016] Figure 10It is a cross-sectional view of an exploded state of a male and female connector according to another embodiment of the present invention.

[0017] Figure 11 It is a cross-sectional view of the assembled state of a male and female connector according to another embodiment of the present invention.

[0018] Figure 12 It is a structural block diagram of the present invention.

[0019] Explanation of reference numerals: 1-power input terminal; 2-first extension line; 3-protection box; 4-cavity; 5-metering meter; 6-electromagnetic protection switch; 7-second extension line; 8-electric vehicle charging gun; 10-female connector; 11-female base; 12-female insulating protective sleeve; 121-connecting section; 122-embedded hole; 123-protective cover; 13-inlet; 14-ground socket; 141-ground socket; 142-ground line; 15-live socket; 151-live socket; 152-live line; 1 6-neutral wire socket; 161-neutral wire socket; 162-neutral wire line; 20-male connector; 21-male base; 22-male insulating protective sleeve; 221-embedded column; 23-introduction slot; 24-ground wire core; 241-ground wire socket; 242-ground wire segment; 25-live wire core; 251-live wire socket; 252-live wire segment; 26-neutral wire core; 261-neutral wire socket; 262-neutral wire segment; a1-first width; a2-second width; a3-first height; a4-second height. DETAILED DESCRIPTION

[0020] In order to have a further understanding of the present invention, a preferred embodiment is listed below and described with reference to the drawings:

[0021] The present invention is used to connect a household circuit and an electric vehicle charging gun 8, and comprises:

[0022] An extension cord body, comprising a first extension cord 2, with a male connector 20 provided at one end thereof, the male connector 20 being connected to a household circuit, wherein the household circuit is electrically provided with a power input terminal 1, the power input terminal 1 being connected to the current output end of the main power switch in the household circuit, and a female connector 10 provided at the other end thereof, the female connector 10 being mated and connected to the male connector 20 of the first extension cord 2;

[0023] The other end of the first extension line 2 is connected to an electromagnetic protection switch 6, the current output end of the electromagnetic protection switch 6 is connected to a metering meter 5, and the current output end of the metering meter 5 is connected to a female connector 10 of the same specifications as the aforementioned through a second extension line 7. The female connector 10 is used to connect to the electric vehicle charging gun 8, wherein one end of the electric vehicle charging gun 8 is provided with a male connector 20 of the same specifications as the aforementioned, and the male connector 20 is matched and connected to the female connector 10 connected to the second extension line 7. The end of the electric vehicle charging gun 8 is provided with a female connector 10 of the same specifications as the aforementioned;

[0024] Each female connector 10 further includes a female base 11. A ground wire socket 14 in the form of a circular hole is provided on the front surface of the female base 11. A live wire socket 15 in the form of a circular hole and a neutral wire socket 16 in the form of a circular hole are provided on both sides of the ground wire socket 14. A first width a1 and a first height a3 are formed between the ground wire socket 14 and the live wire socket 15, and a second width a2 and a second height a4 are formed between the ground wire socket 14 and the neutral wire socket 16. The first width a1 is not equal to the second width a2, and the first height a3 is not equal to the second height a4, thereby forming an asymmetric arrangement.

[0025] Each male connector 20 includes a male base 21. A cylindrical grounding plug 24 is provided on the front face of the male base 21. A round hole-shaped live wire plug 25 and a round hole-shaped neutral wire plug 26 are provided on both sides of the grounding plug 24. The relative positions of the grounding plug 24, the live wire plug 25, and the neutral wire plug 26 are matched with the grounding socket 14, the live wire socket 15, and the neutral wire socket 16 of the female connector 10.

[0026] The extension line body further includes a protection box 3 , in which the electromagnetic protection switch 6 and the metering meter 5 are both installed. The protection box 3 further includes a cavity 4 for accommodating the first extension line 2 and the second extension line 7 .

[0027] The outer edge of the female base 11 of the female connector 10 includes a female insulating protective sleeve 12, and the outer edge of the front end of the female connector 10 is formed with an inlet end 13; the other end of the ground socket 14 is provided with a ground socket 141, and the other end of the ground socket 141 is provided with a ground line 142; the other end of the live socket 15 is provided with a live socket 151, and the other end of the live socket 151 is provided with a live line 152; the other end of the neutral socket 16 is provided with a neutral socket 161, and the other end of the neutral socket 161 is provided with a neutral line 162.

[0028] The outer edge of the male base 21 of the male connector 20 includes a male insulating protective sleeve 22, and the inner edge of the front end of the male connector 20 is formed with an introduction groove 23, which can accommodate the introduction end 13 of the female connector 10. In addition, the other end of the ground wire plug core 24 has a ground wire socket 241, and the other end of the ground wire socket 241 is provided with a ground wire segment 242; the other end of the live wire plug core 25 is provided with a live wire socket 251, and the other end of the live wire socket 251 is provided with a live wire segment 252; the other end of the neutral wire plug core 26 is provided with a neutral wire socket 261, and the other end of the neutral wire socket 261 is provided with a neutral wire segment 262.

[0029] The outer diameter of the ground wire plug 24 of the male connector 20 is smaller than the outer diameters of the live wire plug 25 and the neutral wire plug 26 ; the inner diameter of the ground wire socket 14 of the female connector 10 is also smaller than the inner diameters of the live wire socket 15 and the neutral wire socket 16 .

[0030] Accordingly, the present invention provides a household charging extension cable with a circular cross-section of the ground wire plug 24, the live wire plug 25 and the neutral wire plug 26 of the male connector 20 and the ground wire socket 14, the live wire socket 15 and the neutral wire socket 16 of the female connector 10, which can achieve the electrical contact integrity of the male and female joints, thereby effectively improving the charging efficiency, enabling it to be connected to a household circuit, and providing car owners with the ability to charge in places other than charging stations or charging piles, effectively solving the problem of uneven supply of charging parking spaces, and the asymmetric configuration of the ground wire plug 24, the live wire plug 25 and the neutral wire plug 26 of the male connector 20 and the ground wire socket 14, the live wire socket 15 and the neutral wire socket 16 of the female connector 10, which can achieve fool-proof protection of the male and female electrical plug-in, thereby facilitating the charging and use of electric vehicles, and further, the present invention can be universally applicable to the charging connector sizes of electric vehicles around the world, just like the uniformity of mobile phone charging heads, avoiding the waste of resources caused by the different charging heads of various brands of early mobile phones. At the same time, it can meet the sharing specifications, avoid the situation where the charging equipment and power supply equipment are damaged due to the wrong insertion of non-electric vehicle electrical plugs, and avoid the risk of fire caused by electrical wires.

[0031] See also Figures 10 and 11As shown, it is another embodiment of the present invention, wherein the top of the female insulating protective cover 12 of the female connector 10 can be integrally formed with a connecting section 121, and a protective cover 123 is provided at one end of the connecting section 121. The protective cover 123 can be covered on the inlet end 13 of the female connector 10 when the female connector 10 is not electrically connected in use, so as to protect the female connector 10 from the insertion of foreign objects; in addition, an embedding hole 122 is also provided at a predetermined position of the connecting section 121, and an embedding column 221 is provided at a predetermined position on the top of the male insulating protective cover 123 of the male connector 20. When the female connector 10 and the male connector 20 are electrically connected, the embedding hole 122 is embedded in the embedding column 221, so that the male connector 20 and the female connector 10 can achieve a stable combination in electrical connection, and are not prone to accidental separation. Figure 12 , which is a structural block diagram of the present invention.

[0032] It should be noted that the present invention also includes an extension cord body, which includes a first extension cord 2, a female connector 10 is provided at the end of the first extension cord 2, and the female connector 10 is connected to the household circuit, wherein the household circuit is electrically provided with an input terminal 1, and the input terminal 1 is connected to the current output end of the main power switch in the household circuit. The other end of the input terminal 1 is provided with a male connector 20, and the male connector 20 is matched with the female connector 10 of the first extension cord 2; the other end of the first extension cord 2 An electromagnetic protection switch 6 is connected, and the current output end of the electromagnetic protection switch 6 is connected to a metering meter 5. The current output end of the metering meter 5 is connected to a male connector 20 of the same specification as the aforementioned through a second extension line 7. The male connector 20 is used to connect to the electric vehicle charging gun 8, wherein one end of the electric vehicle charging gun 8 is provided with a female connector 10 of the same specification as the aforementioned, and the female connector 10 is matched and electrically connected to the male connector 20 connected to the second extension line 7. The end of the electric vehicle charging gun 8 is provided with a male connector 20 of the same specification as the aforementioned.

[0033] Based on this, the present invention is a progressive invention that is widely applicable and can overcome the limitations of different regions or insufficient public charging stations, and can reduce the anxiety of electric car owners who have to wait while charging. No similar products or publications have been found.

Claims

1. A male and female connector dedicated to an electric vehicle charging extension cord, which is used to connect a household circuit and an electric vehicle charging gun, comprising an extension cord body, the extension cord body comprising a first extension cord, a male connector provided at the end of the first extension cord, the male connector being connected to the household circuit, wherein the household circuit is electrically provided with an input terminal, the input terminal being connected to the current output end of the main input switch in the household circuit in the power outgoing direction, the other end of the input terminal being provided with a female connector, the female connector being matched and connected to the male connector of the first extension cord; the other end of the first extension cord is connected to an electromagnetic protection switch, the current output end of the electromagnetic protection switch is connected to a metering meter, the current output end of the metering meter is connected to the aforementioned female connector of the same specification through a second extension cord, the female connector being used to connect to the electric vehicle charging gun, wherein one end of the electric vehicle charging gun is provided with the aforementioned male connector of the same specification, the male connector being matched and electrically connected to the female connector connected to the second extension cord, and the end of the electric vehicle charging gun is provided with the aforementioned female connector of the same specification; characterized in that: Each of the female connectors includes a female base, a front face of the female base being provided with a ground wire socket in the form of a circular hole, a live wire socket in the form of a circular hole and a neutral wire socket in the form of a circular hole being provided adjacent to the ground wire socket on either side, wherein the ground wire socket and the live wire socket are relatively formed with a first width and a first height, and the ground wire socket and the neutral wire socket are relatively formed with a second width and a second height, wherein the first width is not equal to the second width, and the first height is not equal to the second height, thereby forming an asymmetric arrangement; and Each male connector includes a male base, the front end of which is provided with a cylindrical earth wire plug, and adjacent to the earth wire plug are a live wire plug in the form of a circular hole and a neutral wire plug in the form of a circular hole. The relative positions of the earth wire plug, the live wire plug and the neutral wire plug are matched with the earth wire socket, the live wire socket and the neutral wire socket of the female connector.

2. The male and female connectors for electric vehicle charging extension cables according to claim 1, characterized in that: The extension line body also includes a protection box. The electromagnetic protection switch and the meter are both installed in the protection box. The protection box is also provided with a cavity capable of accommodating the first extension line and the second extension line.

3. The male and female connectors for electric vehicle charging extension cables according to claim 1, characterized in that: The outer edge of the female base of the female connector includes a female insulating protective sleeve, and the outer edge of the front end of the female connector is formed with an inlet end; the other end of the ground wire socket is provided with a ground wire socket, and the other end of the ground wire socket is provided with a ground wire circuit; the other end of the live wire socket is provided with a live wire socket, and the other end of the live wire socket is provided with a live wire circuit; the other end of the neutral wire socket is provided with a neutral wire socket, and the other end of the neutral wire socket is provided with a neutral wire circuit.

4. The male and female connectors for electric vehicle charging extension cables according to claim 1 or 3, characterized in that: The outer edge of the male base of the male connector includes a male insulating protective sleeve, and the inner edge of the front end of the male connector is formed with an introduction groove, which is just suitable for the introduction end of the female connector to be assembled therein; The other end of the ground wire plug is provided with a ground wire socket, and the other end of the ground wire socket is provided with a ground wire segment; the other end of the live wire plug is provided with a live wire socket, and the other end of the live wire socket is provided with a live wire segment; the other end of the neutral wire plug is provided with a neutral wire socket, and the other end of the neutral wire socket is provided with a neutral wire segment.

5. The male and female connectors for electric vehicle charging extension cables according to claim 1, characterized in that: The outer diameter of the ground wire plug of the male connector is smaller than the outer diameters of the live wire plug and the neutral wire plug; the inner diameter of the ground wire socket of the female connector is also smaller than the inner diameters of the live wire socket and the neutral wire socket.

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