Motor home extension cord with safety protection

Abstract

The utility model discloses a limo extension cord with safety protection, which comprises a plug, a socket and a protection box, a box cover is arranged on the rear end face of the protection box, the box cover is connected with the rear end face of the protection box, a plug cord is arranged on the plug, one end of the plug cord is fixedly connected with the plug, and the other end of the plug cord penetrates through the protection box and the box cover and then is arranged in the protection box. A socket wire is arranged on the socket, one end of the socket wire is fixedly connected with the socket, the other end of the socket wire penetrates through the protection box and the box cover and then is connected with the plug wire, an overload protection switch and an anti-surge and alarm PCBA are arranged in the protection box, the overload protection switch is fixedly connected with the inner wall of the protection box, and the anti-surge and alarm PCBA is fixedly connected with the inner ground of the protection box. The socket wire and the plug wire are both connected with the overload protection switch, and the overload protection switch is connected with the surge prevention and alarm PCBA. The beneficial effects of the utility model are that: it is equipped with overload protection, lightning protection, overvoltage, undervoltage protection and other protection devices, and has wiring error alarm function.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical wires, and in particular to a motorhome extension cord with safety protection. Background Technology

[0002] RV extension cords are electrical products used in RVs, which contain numerous and concentrated items. Overloading the electrical system can have serious consequences. Furthermore, RVs are mostly outdoors, making them vulnerable to lightning strikes during the rainy season, which can damage electrical appliances. RV power supplies are externally supplied and are also susceptible to overvoltage or undervoltage, affecting power usage. Extension cords with safety protection typically lack warnings for wiring errors, leading to a lower product quality rate.

[0003] Chinese Patent Publication No. CN221125575U, authorized and published on June 11, 2024, discloses a wear-resistant and pressure-resistant wire. This utility model relates to the field of wire technology, specifically to a wear-resistant and pressure-resistant wire, including a wire body, an upper pressure-resistant outer shell on the outer wall of the wire body, and a first connecting piece connected to the lower end of the upper pressure-resistant outer shell. This utility model uses bolts to fit the upper and lower pressure-resistant outer shells onto the wire body, encasing the wire body inside the pressure-resistant outer shells. Therefore, under external pressure, the force is concentrated on the upper and lower pressure-resistant outer shells, preventing direct contact with the wire body. This effectively improves the wire's pressure resistance while being protected by the upper and lower pressure-resistant outer shells. Furthermore, a wear-resistant layer on the outer wall of the wire body provides wear protection, reducing material damage and providing excellent protection to the wire, slowing down the aging process and extending the wire's service life. The shortcomings of this utility model are that it lacks overload protection, lightning protection, overvoltage and undervoltage protection devices, and it does not have a wiring error alarm function during installation. Utility Model Content

[0004] This utility model aims to overcome the shortcomings of existing technologies, such as the lack of overload protection, lightning protection, overvoltage and undervoltage protection devices, and the lack of wiring error alarm function during installation. It provides a RV extension cable with safety protection, including overload protection, lightning protection, overvoltage and undervoltage protection devices, and wiring error alarm function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A RV extension cord with safety protection includes a plug, a socket, and a protective box. The protective box has a cover on its rear end face, which is connected to the rear end face of the protective box. The plug has a plug wire, one end of which is fixedly connected to the plug, and the other end of which passes through the protective box and the cover and is placed inside the protective box. The socket has a socket wire, one end of which is fixedly connected to the socket, and the other end of which passes through the protective box and the cover and is connected to the plug wire. The protective box contains an overload protection switch and a surge protection and alarm PCBA. The overload protection switch is fixedly connected to the inner wall of the protective box, and the surge protection and alarm PCBA is fixedly connected to the inner floor of the protective box. Both the socket wire and the plug wire are connected to the overload protection switch, and the overload protection switch is connected to the surge protection and alarm PCBA.

[0007] When in use, plug the plug into the RV's power socket and insert the appliance into the socket. There is a protective box between the socket wire and the plug wire. The box cover seals the protective box to prevent damage to the overload protection switch and the surge protection and alarm PCBA. The overload protection switch will automatically trip when the power is overloaded. The surge protection and alarm PCBA can cut off the power in time in case of lightning strikes, overvoltage, undervoltage, or wiring errors, protecting the appliance from damage. It achieves the purpose of having overload protection, lightning strike protection, overvoltage and undervoltage protection devices, and wiring error alarm function.

[0008] Preferably, the surge protection and alarm PCBA is equipped with a PCBA power input socket and an indicator light socket. The protection box is equipped with a power indicator light and an alarm indicator light. Both the PCBA power input socket and the indicator light socket are fixedly connected to the surge protection and alarm PCBA. The PCBA power input socket is connected to both the socket wire and the plug wire. The indicator light socket is connected to both the power indicator light and the alarm indicator light. Both the power indicator light and the alarm indicator light pass through the inner wall of the protection box and are located outside the box, and are fixedly connected to the protection box. The power indicator light provides a clear indication of whether power is on, and the alarm indicator light provides a warning.

[0009] Preferably, a reset button is provided on the outer surface of the protection box. The reset button passes through the protection box and is connected to the overload protection switch. The reset button is fixedly connected to the outer surface of the protection box. The reset button facilitates continued operation after tripping and maintenance.

[0010] Preferably, both the socket wire and the plug wire are provided with wire retaining sleeves, which are respectively wrapped around the outer surface of the socket wire and the outer surface of the plug wire. The wire retaining sleeves are fixedly connected to one end of the socket wire and one end of the plug wire. Both ends of the protective box and both ends of the box cover are provided with wire passage openings, which are respectively located on the inner surface of the protective box and the inner surface of the box cover. The wire passage openings of the protective box and the box cover correspond to each other. The socket wire and the plug wire are engaged with the protective box and the box cover through the cooperation of the wire passage openings of the protective box and the box cover, and the wire retaining sleeves. The wire retaining sleeves and the wire passage openings can secure the socket wire and the plug wire.

[0011] Preferably, the through-hole is provided with a slot, and the outer surface of the wire fixing sleeve is provided with two locking blocks. The locking blocks correspond one-to-one with the slot and are placed in the slot. The wire fixing sleeve is engaged with the through-hole of the protective box and the through-hole of the box cover respectively through the cooperation of the locking blocks and the slots. The locking blocks and slots prevent the wire fixing sleeve from rotating, thus fixing the position of the socket wire and plug wire more securely.

[0012] Preferably, the outer surface of the plug and the outer surface of the socket are provided with insertion rings, which are fixedly connected to the outer surface of the plug and the outer surface of the socket, respectively. The insertion rings facilitate plugging and unplugging of the plug and socket, making them more convenient to use, preventing contact with metal parts, and avoiding electric shock.

[0013] The beneficial effects of this utility model are: it has overload protection, lightning protection, overvoltage and undervoltage protection devices, and a wiring error alarm function; the power indicator light can intuitively show whether the power is on, and the alarm indicator light can provide a warning; the reset button makes it convenient to continue working after tripping and maintenance; the wire fixing sleeve and the through-hole can fix the socket wire and plug wire; the clip and slot can prevent the wire fixing sleeve from rotating, making the socket wire and plug wire more fixed; the plug-in ring makes it easy to plug and unplug the plug and socket, making it more convenient to use, and preventing contact with metal parts, thus preventing electric shock. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 A magnified view of detail A;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model without a lid;

[0017] Figure 4 This is a cross-sectional view of the side view of this utility model;

[0018] Figure 5 yes Figure 4 A magnified view of detail B.

[0019] In the diagram: 1. Plug, 2. Socket, 3. Plug cord, 4. Socket cord, 5. Protective box, 6. Box cover, 7. Overload protection switch, 8. Surge protection and alarm PCBA, 9. PCBA power input socket, 10. Indicator light socket, 11. Power indicator light, 12. Alarm indicator light, 13. Reset button, 14. Wire fixing sleeve, 15. Through-hole, 16. Slot, 17. Locking block, 18. Insertion ring. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 3 and Figure 4 In one embodiment, a RV extension cord with safety protection includes a plug 1, a socket 2, and a protective box 5. A cover 6 is provided on the rear end face of the protective box 5, and the cover 6 is connected to the rear end face of the protective box 5. A plug wire 3 is provided on the plug 1, with one end fixedly connected to the plug 1 and the other end passing through the protective box 5 and the cover 6 and placed inside the protective box 5. A socket wire 4 is provided on the socket 2, with one end fixedly connected to the socket 2 and the other end passing through the protective box 5 and the cover 6 and connected to the plug wire 3. An overload protection switch 7 and a surge protection and alarm PCBA 8 are provided inside the protective box 5. The overload protection switch 7 is fixedly connected to the inner wall of the protective box 5, and the surge protection and alarm PCBA 8 is fixedly connected to the inner floor of the protective box 5. Both the socket wire 4 and the plug wire 3 are connected to the overload protection switch 7, and the overload protection switch 7 is connected to the surge protection and alarm PCBA 8.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the surge protection and alarm PCBA8 is equipped with a PCBA power input socket 9 and an indicator light socket 10. The protection box 5 is equipped with a power indicator light 11 and an alarm indicator light 12. The PCBA power input socket 9 and the indicator light socket 10 are both fixedly connected to the surge protection and alarm PCBA8. The PCBA power input socket 9 is connected to the socket wire 4 and the plug wire 3 respectively. The indicator light socket 10 is connected to the power indicator light 11 and the alarm indicator light 12 respectively. The power indicator light 11 and the alarm indicator light 12 pass through the inner wall of the protection box 5 and are placed outside the protection box 5. The power indicator light 11 and the alarm indicator light 12 are both fixedly connected to the protection box 5.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, a reset button 13 is provided on the outer side of the protection box 5. The reset button 13 passes through the protection box 5 and is connected to the overload protection switch 7. The reset button 13 is fixedly connected to the outer side of the protection box 5.

[0024] like Figure 3 , Figure 4 and Figure 5 As shown, a wire fixing sleeve 14 is provided on one end of the socket wire 4 and one end of the plug wire 3. The wire fixing sleeve 14 is respectively wrapped around the outer side of the socket wire 4 and the outer side of the plug wire 3. The wire fixing sleeve 14 is fixedly connected to one end of the socket wire 4 and one end of the plug wire 3. A wire passage half opening 15 is provided on both ends of the protective box 5 and both ends of the box cover 6. The wire passage half opening 15 is respectively placed on the inner side of the protective box 5 and the inner side of the box cover 6. The wire passage half opening 15 of the protective box 5 and the wire passage half opening 15 of the box cover 6 correspond to each other. The socket wire 4 and the plug wire 3 are both engaged with the protective box 5 and the box cover 6 through the cooperation of the wire passage half opening 15 of the protective box 5, the wire passage half opening 15 of the box cover 6 and the wire fixing sleeve 14.

[0025] like Figure 4 and Figure 5 As shown, a slot 16 is provided inside the wire passage half-opening 15, and two locking blocks 17 are provided on the outer side of the wire fixing sleeve 14. The locking blocks 17 correspond one-to-one with the slot 16 and are placed inside the slot 16. The wire fixing sleeve 14 is engaged with the wire passage half-opening 15 of the protective box 5 and the wire passage half-opening 15 of the box cover 6 respectively through the cooperation of the locking blocks 17 and the slot 16.

[0026] like Figure 1 and Figure 4 As shown, plug rings 18 are provided on the outer side of plug 1 and the outer side of socket 2, and plug rings 18 are fixedly connected to the outer side of plug 1 and the outer side of socket 2 respectively.

[0027] When connecting the wiring, all internal components of the protection box 5 are connected via wires. The PCBA power input socket 9 is connected to the plug wire 3, the socket wire 4, and the overload protection switch 7. The overload protection switch 7 is also connected to the plug wire 3 and the socket wire 4. The indicator light socket 10 is connected to the power indicator light 11 and the alarm indicator light 12. To prevent the plug wire 3 and the socket wire 4 from rotating freely, the wire fixing sleeve 14 on the plug wire 3 and the socket wire 4 must be locked into the through-hole 15 of the protection box 5 and the box cover 6, so that the locking block 17 on the wire fixing sleeve 14 and the locking groove 16 in the through-hole 15 engage for further positioning. When in use, the plug 1 is inserted into the RV power socket, and the appliance is inserted into the socket 2. The protection box 5 is between the socket wire 4 and the plug wire 3, and the box cover 6 protects the plug wire 3. Box 5 is sealed to prevent damage to the components inside. In case of overload or lightning strike, the overload protection switch 7 will automatically trip to protect the electrical appliances from damage. After checking and finding no problems, press the reset button 13, and the power indicator light 11 will light up, allowing normal use to continue. In case of overvoltage or undervoltage, the surge protection and alarm PCBA8 can light up the alarm indicator light 12 through the indicator light socket 10. When testing for wiring errors (such as reversed live and neutral wires), the surge protection and alarm PCBA8 can also light up the alarm indicator light 12 through the indicator light socket 10. The plug 1 and socket 2 are plugged and unplugged through the plug-in ring 18 on their backs, ensuring safety and preventing electric shock. This achieves the purpose of having overload protection, lightning strike protection, overvoltage and undervoltage protection devices, as well as a wiring error alarm function.

Claims

1. A motorhome extension line with safety protection, characterized in that, Includes a plug (1), a socket (2), and a protective box (5). The protective box (5) has a cover (6) on its rear end face, which is connected to the rear end face of the protective box (5). The plug (1) has a plug wire (3), one end of which is fixedly connected to the plug (1), and the other end of which passes through the protective box (5) and the cover (6) and is placed inside the protective box (5). The socket (2) has a socket wire (4), one end of which is fixedly connected to the socket (2). The other end of the wire (4) passes through the protective box (5) and the cover (6) and is connected to the plug wire (3). The protective box (5) is equipped with an overload protection switch (7) and a surge protection and alarm PCBA (8). The overload protection switch (7) is fixedly connected to the inner wall of the protective box (5). The surge protection and alarm PCBA (8) is fixedly connected to the inner ground of the protective box (5). The socket wire (4) and the plug wire (3) are both connected to the overload protection switch (7). The overload protection switch (7) is connected to the surge protection and alarm PCBA (8).

2. The RV extension line with safety protection according to claim 1, characterized in that, The surge protection and alarm PCBA (8) is provided with a PCBA power input socket (9) and an indicator light socket (10). The protection box (5) is provided with a power indicator light (11) and an alarm indicator light (12). The PCBA power input socket (9) and the indicator light socket (10) are both fixedly connected to the surge protection and alarm PCBA (8). The PCBA power input socket (9) is connected to the socket wire (4) and the plug wire (3) respectively. The indicator light socket (10) is connected to the power indicator light (11) and the alarm indicator light (12) respectively. The power indicator light (11) and the alarm indicator light (12) both pass through the inner wall of the protection box (5) and are placed outside the protection box (5). The power indicator light (11) and the alarm indicator light (12) are both fixedly connected to the protection box (5).

3. The RV extension line with safety protection according to claim 1, characterized in that, The outer side of the protective box (5) is provided with a reset button (13). The reset button (13) passes through the protective box (5) and is connected to the overload protection switch (7). The reset button (13) is fixedly connected to the outer side of the protective box (5).

4. The RV extension line with safety protection according to claim 1, characterized in that, The socket wire (4) and the plug wire (3) are each provided with a wire fixing sleeve (14). The wire fixing sleeve (14) is respectively wrapped around the outer side of the socket wire (4) and the outer side of the plug wire (3). The wire fixing sleeve (14) is fixedly connected to one end of the socket wire (4) and one end of the plug wire (3). The two ends of the protective box (5) and the two ends of the box cover (6) are each provided with a wire passage half opening (15). The wire passage half opening (15) is respectively placed on the inner side of the protective box (5) and the inner side of the box cover (6). The wire passage half opening (15) of the protective box (5) and the wire passage half opening (15) of the box cover (6) correspond to each other. The socket wire (4) and the plug wire (3) are both engaged with the protective box (5) and the box cover (6) through the cooperation of the wire passage half opening (15) of the protective box (5), the wire passage half opening (15) of the box cover (6) and the wire fixing sleeve (14).

5. A RV extension line with safety protection according to claim 4, characterized in that, The wire passage half-opening (15) is provided with a slot (16), and the outer side of the wire fixing sleeve (14) is provided with two locking blocks (17). The locking blocks (17) correspond one-to-one with the slots (16) and are placed in the slots (16). The wire fixing sleeve (14) is engaged with the wire passage half-opening (15) of the protective box (5) and the wire passage half-opening (15) of the box cover (6) respectively through the cooperation of the locking blocks (17) and the slots (16).

6. The RV extension line with safety protection according to claim 1, characterized in that, The outer side of the plug (1) and the outer side of the socket (2) are provided with a plug-in ring (18), which is fixedly connected to the outer side of the plug (1) and the outer side of the socket (2) respectively.

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