New energy vehicle external release transfer coupler

Abstract

The application belongs to the technical field of connectors, and particularly relates to a new energy vehicle external discharging adapter coupler, which comprises an adapter shell, a butt joint terminal for butt joint with a charging interface of a new energy vehicle and a plug-in terminal for plug-in of a power supply plug of an external device are arranged in the adapter shell; a control module for controlling on-off of the power supply plug-in terminal and an overload protection module arranged at an input end of the control module are further arranged; the control module and the overload protection module are arranged in the adapter shell; the overload protection module comprises a plastic packaging shell, two lead-out terminals arranged at two ends of the plastic packaging shell, and a normally-open type manual reset anti-overload unit and a normally-closed type anti-overload unit which are packaged in parallel in the plastic packaging shell; the overload protection module can realize multiple overload protections for a vehicle power system, and practicality and user experience are significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicle connector, and particularly relates to a new energy vehicle external discharge adapter coupler. BACKGROUND

[0002] With the development of science and technology, the automobile has become an indispensable means of transportation in people's daily life. With the increasing endurance of electric vehicles, more functions are also given, such as V2L (Vehicle to Load) external discharge function. The electric vehicle can output 220V 50Hz household alternating current, and the power can reach 3.3KW. Using external discharge coupler to discharge externally, thereby realizing power supply to the electric vehicle, the old generation of bicycles, electric motorcycles and other devices that can be powered by the automobile, greatly improving the safety and convenience of power supply.

[0003] However, since the external discharge coupler may be used with multiple plug interfaces at the same time, this will cause the power interface to be overloaded and overcurrent, and the power interface may be burned or the battery may be damaged. The couplers on the market basically only have the function of connection, and cannot solve the problem of overloading in actual use. Therefore, we specially design a new coupler to meet the market demand. SUMMARY

[0004] The purpose of the present application is to provide a new energy vehicle external discharge adapter coupler to solve the problems in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a new energy vehicle external discharge adapter coupler, comprising an adapter shell, the adapter shell is provided with a butt joint terminal for butt joint with a charging interface of a new energy vehicle and a plug-in terminal for plug-in of a power plug of an external device;

[0006] Further comprising a control module for controlling the on-off of the power plug-in terminal, and an overload protection module provided at the input end of the control module; the control module and the overload protection module are both provided in the adapter shell;

[0007] The overload protection module comprises a plastic packaging shell, two lead terminals provided at both ends of the plastic packaging shell, and a normally open type manual reset anti-overload unit and a normally closed type anti-overload unit packaged in parallel in the plastic packaging shell.

[0008] The new energy vehicle external discharge adapter coupler provided by the present application, wherein the lead terminal comprises a conductive adapter seat matched with the inner diameter of the plastic packaging shell, and a lead body penetrating the end face of the plastic packaging shell and connected with the conductive adapter seat; the opposite side walls of the two conductive adapter seats are respectively provided with a first mounting position and a second mounting position corresponding to the normally open type manual reset anti-overload unit and the normally closed type anti-overload unit.

[0009] The new energy vehicle external discharge adapter coupler, wherein the normally closed anti-overload unit comprises a sealed insulating packaging tube, two electrode pins respectively arranged at two ends of the insulating packaging tube, and a first fuse arranged in the insulating packaging tube and connected to the two electrode pins; when assembled in place, the two electrode pins are respectively abutted against the two second mounting positions.

[0010] The new energy vehicle external discharge adapter coupler, wherein the insulating packaging tube is a quartz tube; the normally closed anti-overload unit further comprises an explosion-proof film wrapped on the outer sidewall of the insulating packaging tube.

[0011] The new energy vehicle external discharge adapter coupler, wherein the normally closed anti-overload unit further comprises an insulating protective cover covering the insulating packaging tube on the inner wall of the plastic packaging shell, and the normally open manual reset anti-overload unit is located on the back side of the insulating protective cover.

[0012] The new energy vehicle external discharge adapter coupler, wherein the normally open manual reset anti-overload unit and the normally closed anti-overload unit are arranged side by side in front and back; the front sidewall of the adapter shell is provided with a trigger operation assembly facilitating the user to operate the normally open manual reset anti-overload unit to close and conduct, and is also provided with a docking window corresponding to the docking terminal.

[0013] The new energy vehicle external discharge adapter coupler, wherein the normally open manual reset anti-overload unit comprises a movable contact arranged in front and back, an elastic insulating strip arranged on the first mounting position along the axial direction of the plastic packaging shell, and a second fuse connecting the movable contact and another conductive adapter seat away from the movable contact; the movable contact is arranged on the end of the elastic insulating strip, an integral contact base is arranged on the rear side of the movable contact on the first mounting position, and in the closed state, the movable contact is driven by the trigger operation assembly to be in contact with the contact base.

[0014] The new energy vehicle external discharge adapter coupler, wherein the trigger operation assembly comprises a cylindrical member arranged on the front side of the plastic packaging shell in the front-rear direction, and a movable shaft axially movably arranged in the cylindrical member; the front end of the cylindrical member is connected with the inner wall of the adapter shell and the inner cavity thereof penetrates through the front sidewall of the adapter shell; when assembled in place, the movable shaft is abutted against the outer sidewall of the plastic packaging shell and is opposite to the movable contact in front and back.

[0015] The new energy vehicle external output adapter coupler has the advantages that the control module includes a control panel vertically arranged at the rear side of the inner cavity of the adapter shell and a relay for controlling the on-off of the power plug-in terminal; and the relay is arranged on the front side wall of the control panel.

[0016] The new energy vehicle external output adapter coupler has the advantages that the adapter shell is in a cubic structure, the front side wall of the adapter shell is provided with the docking window, the upper side wall and the left and right side walls are each provided with a plug-in port corresponding to the plug-in terminal, and the rear side wall is provided with a button corresponding to the control switch on the control panel.

[0017] Compared with the prior art, the new energy vehicle external output adapter coupler has the advantages that:

[0018] The overload protection module including the plastic packaging shell and the parallelly connected normally open type manual reset overload prevention unit and normally closed type overload prevention unit is arranged, so that the coupler realizes a double overload protection mechanism based on the parallel circuit principle; specifically, the normally closed type overload prevention unit is kept on during normal operation and is automatically fused to cut off the circuit when the current is overloaded, so as to prevent the equipment from being damaged; and the normally open type manual reset overload prevention unit needs to be manually operated to be closed, so as to ensure that the power supply is not automatically restored before the fault is eliminated, thereby avoiding the risk of repeated overload.

[0019] The structure effectively solves the overload problem caused by the simultaneous use of multiple plug-in ports, protects the charging interface of the new energy vehicle and external equipment, improves the safety and reliability of the external power supply, and enhances the recoverability of the equipment and the user control convenience through the manual reset function. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 It is a front perspective view of the present application.

[0022] Figure 2 It is an exploded view of the present application. Figure 1

[0023] Figure 3 It is a partial structure enlarged view of the present application. Figure 2

[0024] Figure 4 It is a rear perspective view of the present application. Figure 2 ​​​

[0025] Figure 5 This is a schematic diagram of the assembly of the positioning plate and the terminal mounting plate of the present invention.

[0026] Figure 6 This is a diagram showing the internal structure of the outer casing of the present invention.

[0027] Figure 7 This is an exploded view of the terminal mounting plate of the present invention.

[0028] Figure 8 for Figure 7 An assembly diagram from another perspective.

[0029] Figure 9 This is a side view of the present invention.

[0030] Figure 10 for Figure 9 AA sectional view.

[0031] Figure 11 for Figure 10 Enlarged view of a local structure.

[0032] Figure 12 for Figure 11 Enlarged view of a local structure.

[0033] Figure 13 This is a front view of the present invention.

[0034] Figure 14 for Figure 13 BB cross-sectional view.

[0035] Figure 15 for Figure 14 Enlarged view of a local structure.

[0036] Figure 16 This is a circuit schematic diagram of the present invention. Detailed Implementation

[0037] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0038] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common set of embodiments, although they can be. Those skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments in various ways.

[0039] "Multiple" refers to two or more. "And / or" describes an associative relationship between associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0040] Furthermore, the terms "upper", "lower", "left", "right", "upper end", "lower end", "vertical", and the like indicating the orientation are all based on the attitude position of the device or equipment described in the scheme when it is normally used.

[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0042] The embodiment discloses a new energy vehicle external release adapter coupler as shown in Figures 1 to 16 The coupler includes an adapter shell 10, the adapter shell 10 is internally provided with a docking terminal 20 for docking with a charging interface of a new energy vehicle and a plug-in terminal 30 for plug-in of a power plug of an external device; wherein the docking terminal 20 includes three left and right horizontally arranged input terminal shafts 21 and three left and right horizontally arranged signal communication terminal shafts 22, specifically, the three signal communication terminal shafts 22 are located directly above the three input terminal shafts 21; the signal communication terminal shaft 22 is used for realizing transmission of control signals, and the input terminal shaft 21 is used for transmission of electric energy.

[0043] Further, the coupler further comprises a control module 40 for controlling the on-off of the power plug terminal, and an overload protection module 50 arranged at the input end of the control module 40; the control module 40 and the overload protection module 50 are arranged in the adapter shell 10; wherein the overload protection module 50 comprises a plastic packaging shell 51, two lead terminals 52 arranged at both ends of the plastic packaging shell 51, and a normally open type manual reset anti-overload unit 53 and a normally closed type anti-overload unit 54 packaged in parallel in the plastic packaging shell 51; specifically, the plastic packaging shell 51 is in a cylindrical shape and is generally made of 1050, 1060, 1070, 1100 or the like pure aluminum plate with soft texture, and of course can also be made of plastic aluminum magnesium alloy with soft texture; it should be emphasized that in order to ensure insulation, the inner wall of the plastic packaging shell 51 has a high-temperature-resistant insulation layer, such as high-temperature-resistant insulation paint, phosphate-based coating, plasma sprayed aluminum oxide coating, or directly sleeving a polyimide insulation film inside.

[0044] The coupler of the present scheme realizes a double overload protection mechanism based on the parallel circuit principle by arranging the overload protection module 50 comprising the plastic packaging shell 51 and the normally open type manual reset anti-overload unit 53 and the normally closed type anti-overload unit 54 in parallel; specifically, the normally closed type anti-overload unit 54 remains conductive during normal operation, and automatically fuses to cut off the circuit when the current is overloaded, preventing damage to the equipment; while the normally open type manual reset anti-overload unit 53 needs to be closed by user operation, ensuring that the power supply will not automatically restore before the fault is eliminated, avoiding the risk of repeated overload; this structure effectively solves the problem of overload caused by simultaneous use of multiple plug interfaces, protects the charging interface of the new energy vehicle and the external equipment, improves the safety and reliability of the external power supply, and enhances the recoverability of the equipment and the user control convenience through the manual reset function.

[0045] In the present embodiment, the lead terminal 52 comprises a conductive adapter seat 521 coaxially adapted to the inner cavity of the plastic packaging shell 51, and a lead body 522 penetrating the end face of the plastic packaging shell 51 and connected with the conductive adapter seat 521; specifically, the conductive adapter seat 521 is also in a cylindrical shape and its outer peripheral sidewall is attached to the inner wall of the plastic packaging shell 51 after assembly, and the conductive adapter seat 521 is generally made of pure copper material to ensure the conductivity; further, the opposite sidewalls of the two conductive adapter seats 521 are respectively provided with a first mounting position 5a and a second mounting position 5b corresponding to the normally open type manual reset anti-overload unit 53 and the normally closed type anti-overload unit 54; specifically, the second mounting position 5b is an axially recessed groove, while the first mounting position 5a is formed through the end face of the conductive adapter seat 521, and after assembly, the normally open type manual reset anti-overload unit 53 and the normally closed type anti-overload unit 54 are respectively connected in conduction with the lead body 522 through the first mounting position 5a and the second mounting position 5b.

[0046] By arranging the normally open type manual reset anti-overload unit 53 and the normally closed type anti-overload unit 54 side by side inside the plastic packaging shell 51, the integration of the overload protection module 50 can be greatly improved, and the volume is more compact, so as to adapt to the requirement that the volume of the adapter housing 10 cannot be designed to be too large, and to ensure that other elements inside the adapter housing 10 have sufficient installation space.

[0047] In this embodiment, the normally closed type anti-overload unit 54 includes a sealed insulation packaging tube 541, two electrode pins 542 respectively arranged at two ends of the insulation packaging tube 541, and a first fuse 543 arranged in the insulation packaging tube 541 and connected to the two electrode pins 542; when assembled in place, the two electrode pins 542 are respectively abutted on the two second mounting positions 5b for conduction connection; specifically, the insulation packaging tube 541 is a quartz tube; the normally closed type anti-overload unit 54 further includes an explosion-proof film wrapped on the outer wall of the insulation packaging tube 541, which can ensure that the insulation packaging tube 541 is broken into debris in the plastic packaging shell 51 during transportation and use and interferes with the normal work of other elements; in addition, it can also avoid the insulation packaging tube from being affected by a large temperature difference and being broken and collapsed when the ambient temperature is relatively low and an overload occurs, not only providing higher protection for the first fuse 543, but also effectively reducing the loss rate of product transportation and improving the environmental adaptability of the product.

[0048] In this embodiment, the normally closed type anti-overload unit 54 further includes an insulation protection cover 545 covering the insulation packaging tube 541 on the inner wall of the plastic packaging shell 51, and the normally open type manual reset anti-overload unit 53 is located on the back side of the insulation protection cover 545 to separate the normally open type manual reset anti-overload unit 53, avoiding the mutual interference of the operation of the two.

[0049] In this embodiment, the normally open manual reset overload protection unit 53 and the normally closed overload protection unit 54 are arranged side by side; the front side wall of the adapter housing 10 is provided with a trigger operation component 60 to facilitate the user's operation of closing and conducting the normally open manual reset overload protection unit 53, and the front side wall of the adapter housing 10 is also provided with a docking window 101 corresponding to the docking terminal 20. There are two normally open manual reset overload protection units 53, each located on the first mounting position 5a corresponding to the left and right conductive adapter seats 521. Specifically, the normally open type... The manual reset overload protection unit 53 includes a movable contact 531 that can be moved back and forth and serves as a conductor. The movable contact 531 and the conductive adapter 521 are made of the same material. After assembly, the front end of the movable contact 531 abuts against the front side wall of the inner cavity of the plastic encapsulation shell. Furthermore, the normally open manual reset overload protection unit 53 also includes an elastic insulating strip 532 disposed on the first mounting position 5a along the axial direction of the plastic encapsulation shell, and a conductive adapter 521 connecting the movable contact 531 and another conductive adapter 521 located away from it. The second fuse 533; the movable contact 531 is located at the end of the elastic insulating strip 532, and an integrated contact base 70 is provided on the rear side of the movable contact 531 on the first mounting position 5a, that is, the contact base 70 is located between the insulating protective cover 545 and the movable contact 531; specifically, the elastic insulating strip 532 is inserted into the slot a1 located on the first mounting position 5a, and the end of the second fuse 533 away from the movable contact 531 connected to it is pressed against the surface of the first mounting position 5a by the annular chuck 5c on the elastic insulating strip 532; after assembly, in the closed state, the movable contact 531 is driven by the trigger operation component 60 to move backward and fit against the contact base 70 to conduct, thereby realizing that even if the first fuse 543 has been worn out, it can be quickly reset and conducted again by the external trigger operation component 60 without disassembling the adapter housing 10 to achieve conduction reset; wherein, the contact base 70 not only plays the role of conduction, but also plays the role of preventing the movable contact 531 from directly abutting against the quartz tube and causing it to break and be damaged.

[0050] In addition, to prevent a short circuit caused by contact between the two second fuses 533, the interior of the plastic encapsulation housing 51 may be filled with insulating oil, or an insulating coating or insulating sleeve may be applied to the exterior of the second fuses 533.

[0051] In the embodiment, the trigger operation assembly 60 comprises a cylindrical member 61 arranged on the front side of the plastic packaging shell 51 along the front-rear direction, and a movable shaft 62 axially movably arranged in the cylindrical member 61; the front end of the cylindrical member 61 is integrally connected with the inner wall of the adapter housing 10, and the inner cavity of the cylindrical member 61 penetrates through the front side wall of the adapter housing 10; when assembled in place, the movable shaft 62 abuts against the outer side wall of the plastic packaging shell 51 and is front-to-back opposite to the movable contact 531; the movable shaft 62 can be movably arranged in the cylindrical member 61 by a damping sliding assembly, or can be assembled with the cylindrical member 61 by a threaded connection; in the latter mode, a groove or a protruding member for facilitating the tool screwing is arranged on the front end surface of the movable shaft 62; in actual use, the user pushes the movable shaft 62 inward by using a tool to make the movable shaft 62 extrude and deform the front side wall of the plastic packaging shell 51 and make the deformed part push the movable contact 531 to move rearward and abut against the contact base 70; at this time, the left and right two conductive adapter sockets 521 are conducted through the second fuse 533 and the contact base 70.

[0052] In addition, in order to ensure the installation stability of the plastic packaging shell 51, the adapter housing 10 has a positioning part 81 for mounting the plug-in terminal 30 support 80 inside the adapter housing 10, which abuts the plastic packaging shell 51 against the rear end surface of the cylindrical member 61; the positioning part 81 is specifically a semicircular cylindrical member 61 arranged in the left-right direction; after assembly, the semicircular cylindrical member 61 abuts against the rear side wall of the plastic packaging shell 51; it should be noted that the left and right ends of the semicircular cylindrical member 61 are at least front-to-rear aligned with the movable contact 531.

[0053] Specifically, the bracket 80 comprises a positioning plate 8a vertically arranged at the front side of the inner cavity of the adapter shell 10. The positioning plate 8a is square in shape and has a rectangular boss 8a1 on the front side wall. The concave surface of the positioning part 81 faces the positioning plate 8a and is located above the boss 8a1. In order to facilitate the installation of the overload protection module 50, the positioning plate 8a is designed as a hollow structure at the positions of the left and right ends of the positioning part. Further, the part corresponding to the boss 8a1 on the front side of the positioning plate 8a is recessed backward to form a concave cavity. The rear ends of the input terminal shaft 21 and the signal communication terminal shaft 22 penetrate the boss 8a1 in the concave cavity. The boss 8a1 has a corresponding positioning slot on the end face for the input terminal shaft 21 and the signal communication terminal shaft 22. After assembly, the front ends of the input terminal shaft 21 and the signal communication terminal shaft 22 protrude out of the concave cavity, and the rear ends are coaxially located in the corresponding positioning slots. The first annular cofferdam 90 is provided on the edge of the end face of the boss 8a1, and the outer side wall of the first annular cofferdam 90 is flush with the outer side wall of the boss 8a1. Further, the second annular cofferdam 100 is inserted into the first annular cofferdam 90 on the rear side wall of the inner cavity of the adapter shell and has the same length as the first annular cofferdam 90. The butt joint window 101 is located on the inner side of the second annular cofferdam 100, and the inner walls of the two are aligned. When assembled in place, the rear ends of the input terminal shaft 21 and the signal communication terminal shaft 22 are located inside the second annular cofferdam 100. Further, the cylindrical member 61 is located above the second annular cofferdam 100.

[0054] Further, the bracket 80 further comprises a terminal mounting plate 8b for mounting each conductive metal sheet 31 of the plug-in terminal 30. The connecting positioning tube a11 is integrally and vertically arranged at the four corner positions of the rear side wall of the positioning plate 8a. The opposite side walls of the two connecting positioning tubes a11 adjacent to the edge of the positioning plate 8a are integrally provided with a guide slot member 110 for the insertion of the terminal mounting plate 8b in the front-rear direction. This design not only allows the plug-in terminal 30 to be replaced and processed as a separate module, which is beneficial for cost control, but also plays a positioning role for the terminal mounting plate 8b, ensuring that the terminal mounting plate 8b remains stable and does not shake during repeated plug-in of the plug.

[0055] The terminal mounting plate 8b specifically comprises a mounting plate frame b1 and a detachable abutting plate b2. The conductive metal sheet 31 is separably embedded in the mounting plate frame b1 and is abutted by the abutting plate b2. Correspondingly, the mounting holes for mounting the conductive metal sheet 31 on the mounting plate frame b1 penetrate through the two side walls, so that the power plug of the external device can be plugged in for power supply. In order to improve the safety of the mounting holes, the existing safety protection door 160 can be added to the mounting plate frame b1.

[0056] Further, the adapter shell 10 comprises an L-shaped base 1a, the second annular cofferdam 100 and the cylindrical member and the butt joint window 101 are arranged on the side wall inside the longitudinal end of the base 1a, and the positioning plate 8a is fixed on the side wall inside the transverse end of the base 1a by screws; further, the adapter shell 10 further comprises an outer cover 1b matched with the base 1a to form a sealed cubic structure, the outer cover 1b is square in shape and the rear side wall and the lower side wall are both open to provide a position for the sealed assembly of the base 1a; specifically, a connecting positioning shaft 120 which can be inserted into the connecting positioning tube a11 is integrally arranged horizontally on the inner front side wall of the outer cover 1b; in order to further ensure the anti-seismic performance of the positioning plate 8a after assembly, a positioning column 130 is integrally arranged on the front side wall of the positioning plate 8a above the positioning part 81 in the front-rear direction, and a socket 140 is arranged on the side wall inside the base 1a, and the socket 140 has a slot 141 for the insertion of the positioning column 130.

[0057] In the embodiment, the control module 40 comprises a control board 41 vertically arranged on the rear side of the inner cavity of the adapter shell 10, and a relay 42 for controlling the on-off of the power plug-in terminal; the relay 42 is arranged on the front side wall of the control board 41; further, the adapter shell 10 is in a cubic structure and the butt joint window 101 is arranged on the front side wall thereof, the upper side wall and the left and right side walls of the adapter shell 10 are both provided with plug-in interfaces 1c corresponding to the plug-in terminals 30, and the rear side wall is provided with a button 1d corresponding to the control switch on the control board 41; specifically, the control circuit of the control board 41 is as shown in the following figure: Figure 16

[0058] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all such improvements and changes shall fall within the protection scope of the appended claims of the present application.​

Claims

1. A new energy vehicle external speaker adapter coupler, characterized in that, It includes an adapter housing, which has a docking terminal for connecting to the charging interface of a new energy vehicle and a plug-in terminal for plugging in the power plug of an external device. It also includes a control module that controls the on / off state of the power plug terminals, and an overload protection module located at the input end of the control module; both the control module and the overload protection module are located inside the adapter housing; The overload protection module includes a plastic encapsulation shell, two lead terminals located at both ends of the plastic encapsulation shell, and a normally open manual reset overload protection unit and a normally closed overload protection unit encapsulated in parallel within the plastic encapsulation shell. The lead-out terminal includes a conductive adapter that is adapted to the inner diameter of the plastic encapsulation shell, and a lead-out body that penetrates the end face of the plastic encapsulation shell and is connected to the conductive adapter; the two conductive adapters are provided with a first mounting position and a second mounting position on their opposite side walls, corresponding to the normally open type manual reset overload protection unit and the normally closed type overload protection unit, respectively. The normally open manual reset overload protection unit and the normally closed overload protection unit are arranged side by side; the front side wall of the adapter housing is provided with a trigger operation component to facilitate the user to close and conduct the normally open manual reset overload protection unit, and also with a docking window corresponding to the docking terminal; The normally open manual reset overload protection unit includes a movable contact that is movably positioned front to back, an elastic insulating strip that is positioned at the first mounting position along the axial direction of the plastic encapsulation shell, and a second fuse connecting the movable contact to another conductive adapter located away from it. The movable contact is located at the end of the elastic insulating strip, and an integral contact base is provided at the first mounting position on the rear side of the movable contact. In the closed state, the movable contact is driven by the trigger operation component to engage and conduct with the contact base. The triggering operation component includes a cylindrical member disposed on the front side of the plastic encapsulation shell in the front-back direction, and a movable shaft axially disposed within the cylindrical member; The front end of the cylindrical component is connected to the inner wall of the adapter housing, and the inner cavity penetrates the front side wall of the adapter housing; when assembled, the movable shaft abuts against the outer side wall of the plastic encapsulation shell and is directly opposite the movable contact.

2. The new energy vehicle external speaker adapter coupler according to claim 1, characterized in that, The normally closed overload protection unit includes an insulating encapsulation tube sealed at both ends, two electrode pins respectively disposed at both ends of the insulating encapsulation tube, and a first fuse disposed inside the insulating encapsulation tube and connected to the two electrode pins; when assembled, the two electrode pins respectively abut against the two second mounting positions.

3. The new energy vehicle external speaker adapter coupler according to claim 2, characterized in that, The insulating encapsulation tube is a quartz tube; the normally closed overload protection unit also includes an explosion-proof film covering the outer wall of the insulating encapsulation tube.

4. The new energy vehicle external speaker adapter coupler according to claim 3, characterized in that, The normally closed overload protection unit also includes an insulating protective cover that covers the inner wall of the plastic encapsulation shell with the insulating encapsulation tube, and the normally open manual reset overload protection unit is located on the back side of the insulating protective cover.

5. The new energy vehicle external speaker adapter coupler according to claim 1, characterized in that, The control module includes a control board vertically disposed on the rear side of the inner cavity of the adapter housing, and a relay for controlling the on / off state of the power plug-in terminal; the relay is disposed on the front side wall of the control board.

6. The new energy vehicle external speaker adapter coupler according to claim 5, characterized in that, The adapter housing has a cubic structure and the docking window is provided on its front side wall. The upper side wall and the left and right side walls are provided with plug interfaces corresponding to the plug terminals. The rear side wall is provided with buttons corresponding to the control switches on the control panel.

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