DC plug-in device and method for plug and socket

Abstract

The present invention provides a DC plug-in device and method for a plug and a socket, comprising: a DC socket (1), a DC plug (2) and a DC electrical appliance (3); a mechanical switch (4) and a mechanical switch starting mechanism (7) are provided in the DC socket (1), and the mechanical switch starting mechanism (7) is connected to the mechanical switch (4); a latch (8) is provided in the DC plug (2); a load starting mechanism (9) is provided in the DC electrical appliance (3); the latch (8) is in contact with and connected to the load starting mechanism (9) and the mechanical switch starting mechanism (7) respectively; the latch (8) controls the opening / closing of the load starting mechanism (9) and controls the opening / closing of the mechanical switch (4) by controlling the mechanical switch starting mechanism (7) to achieve arc extinguishing during the plug-in process; the present invention realizes arc-free plugging and disconnection of the plug and the socket, avoids arc burning, and prolongs the service life of the DC plug and the socket.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a direct current plugging device and method for a plug and a socket. Background Art

[0002] In everyday electrical devices, such as home appliances, the majority of their internal circuits are driven by DC power, requiring power conversion circuits to achieve AC-DC conversion. Advances in power electronics have made it possible to provide stable and reliable DC power to these devices. Directly powering DC appliances with DC power eliminates the need for less efficient AC-DC conversion circuits, saving both manufacturing costs and energy. This has garnered widespread attention. However, unlike AC, DC does not undergo alternating currents, and its current waveform lacks zero crossings. When a working DC appliance is physically disconnected from a DC power source by plugging it in and out, a certain level of power is present, and this can easily generate a long-lasting, high-temperature arc, posing a fire hazard. Therefore, the arcing problem associated with DC plugging and unplugging has become a significant constraint on the development of DC power.

[0003] In order to suppress DC arcs during the process of plugging and unplugging electrical appliances, two methods are commonly used to achieve this: one is to use a lower DC voltage to reduce the breakdown effect of the arc on insulating media such as air, and reduce the arc duration and arc length when the plug is unplugged; but this method cannot fundamentally suppress the generation of DC arcs. When the DC electrical equipment is not firmly plugged in and works under a larger current, arcing will still occur. When the power of the appliance is small, it can be directly plugged and unplugged (when the working current is only a few amperes), but when the power of the appliance is large, in order to achieve safe separation of the appliance plug and socket, you can only turn off the appliance first to reduce the working current to 0, and then perform the plug-in and unplug operation; the other is to add a first-level mechanical switch in the socket to perform a disconnection operation before the electrical equipment is physically unplugged, such as Figure 13 As shown, to ensure that the electrical equipment is in a power-off state when the plug is unplugged and separated from the socket, at the same time, in order to prevent the operator from operating the switch by mistake, the switch is often interlocked with the plug to ensure that the switch in the socket is disconnected before the plug can be unplugged. Although the above two plug-in methods can alleviate the arc problem during the DC plug-in and unplugging process to a certain extent, there are still some difficult-to-overcome problems. Although the former is easy to extinguish the arc due to the low DC voltage, it cannot fundamentally suppress the generation of DC arcs. When the DC electrical equipment is not firmly plugged in and works under a large current, there is still a risk of arcing; and although the latter can extinguish the arc first through a mechanical switch and then achieve the operation of safely unplugging the plug, the mechanical switch is prone to deterioration of its performance due to the high temperature of the arc during the arc extinguishing process, thereby reducing its service life. Summary of the Invention

[0004] To address the aforementioned shortcomings of the prior art, the present invention provides a DC plug-and-socket connection device and method. This device addresses the issue of DC arcing during DC plug-and-socket connection, while also ensuring both DC plug-and-socket safety and the lifespan of the DC plug and socket. By rationally designing the physical and operational mechanisms for both electrical and physical disconnection, the device achieves reliable connection and safe disconnection between the DC plug and socket, thereby ensuring DC power safety and extending the lifespan of the DC plug-and-socket device.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The present invention provides a DC plug-and-socket device, comprising: a DC socket (1), a DC plug (2) and a DC electrical appliance (3);

[0007] The DC socket (1) is provided with a mechanical switch (4) and a mechanical switch starting mechanism (7), and the mechanical switch starting mechanism (7) is connected to the mechanical switch (4); the DC plug (2) is provided with a latch (8); and the DC electrical appliance (3) is provided with a load starting mechanism (9);

[0008] The latch (8) is in contact with and connected to the load starting mechanism (9) and the mechanical switch starting mechanism (7) respectively;

[0009] The latch (8) controls the opening / closing of the load starting mechanism (9) and controls the opening / closing of the mechanical switch starting mechanism (7) and further controls the opening / closing of the mechanical switch (4) to achieve arc extinguishing during the plugging process.

[0010] Preferably, the latch (8) comprises: a load switch starting mechanism (13), a switch (16) and a first spring (15);

[0011] One side of the load switch starting mechanism (13) is fixedly connected to the first spring (15);

[0012] The side wall of the DC plug (2) has a recess, and a side of the load switch starting mechanism (13) connected to the first spring (15) and the first spring (15) enter the recess;

[0013] The load switch starting mechanism (13) is in contact with the load starting mechanism (9) via the switch (16).

[0014] Preferably, the switch (16) is a contact switch;

[0015] The load switch starting mechanism (13) is connected to the moving contact of the switch (16), and the static contact of the switch (16) is connected to the load starting mechanism (9).

[0016] Preferably, the DC socket (1) further comprises a second spring (14); the second spring (14) is fixedly connected between the mechanical switch activation mechanism (7) and the inner wall of the bottom shell of the DC socket (1);

[0017] The size of the DC socket (1) socket is adapted to the size of the DC plug (2), and a first protrusion (133) matching the first groove (132) of the latch (8) is provided on the housing at the socket, for locking the latch (8) when the DC plug (2) is fully inserted;

[0018] The mechanical switch starting mechanism (7) and the second spring (14) are arranged in the socket of the DC socket (1) and are located below the first protrusion (133). When the second spring (14) is in a free state, the first protrusion (133) contacts the mechanical switch starting mechanism (7).

[0019] Preferably, the mechanical switch (4) is a contact plug;

[0020] The moving contact of the mechanical switch (4) is fixedly connected to the mechanical switch starting mechanism (7); and the static contact of the mechanical switch (4) is connected to a power source.

[0021] Preferably, the length of the first side (131) of the load switch starting mechanism (13) is greater than the maximum distance between the static contact and the moving contact of the mechanical switch (4).

[0022] Based on the same design concept, the present invention also provides a method for inserting a plug into a DC socket in an arc-extinguished state, comprising:

[0023] As the DC plug (2) is inserted, the latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected;

[0024] The latch (8) controls the mechanical switch activation mechanism (7) in the DC socket (1) to actuate, thereby controlling the mechanical switch (4) from being opened to being closed;

[0025] As the DC plug (2) continues to be inserted until it is fully pushed into place, the latch (8) is connected to the DC electrical appliance (3), and at the same time, the latch (8) triggers the load starting mechanism (9) to close, and the DC electrical appliance (3) is energized.

[0026] Preferably, the latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected, including:

[0027] The latch (8) enters the recess on the side wall of the DC plug (2), compressing the first spring (15) and driving the switch (16) from closed to open;

[0028] At this time, the circuit in the DC electrical appliance (3) is closed, and the mechanical switch (4) is in an off state.

[0029] Preferably, the (8) controls the mechanical switch starting mechanism (7) in the DC socket (1) to operate, thereby controlling the mechanical switch (4) from opening to closing, including:

[0030] As the DC plug (1) enters, the latch (8) pushes the mechanical switch activation mechanism (7) toward the second spring (14), compressing the second spring (14) and driving the mechanical switch (4) to close.

[0031] Preferably, as the DC plug (2) continues to be inserted until it is fully pushed into place, (8) connects to (3), and at the same time, the latch (8) triggers the load starting mechanism (9) to close, including:

[0032] The DC plug (2) is inserted further until it is fully pushed into place, at which point the first protrusion (131) of the DC socket (1) enters the first recess (132) of the latch (8), the first spring (15) returns to its original length, and while the load switch starting mechanism (13) is popped out, it drives the switch (16) from open to closed, triggering the load starting mechanism (9) to control the DC electrical appliance (3) and energize the circuit of the DC electrical appliance.

[0033] Based on the same design concept, the present invention also provides a method for removing a plug from a DC socket in an arc-extinguished state, comprising:

[0034] As the DC plug (2) is pulled out, the latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected;

[0035] The latch (8) controls the mechanical switch activation mechanism (7) in the DC socket (1) to actuate, thereby controlling the mechanical switch (4) from closed to open;

[0036] As the DC plug (2) continues to be pulled out until it is completely separated, the latch (8) triggers the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection.

[0037] Preferably, the lock (8) on the DC plug (2) controls the connection to the DC electrical appliance (3) and the disconnection, including:

[0038] The latch (8) enters the recess on the side wall of the DC plug (2), compressing the first spring (15) and driving the switch (16) from closed to open;

[0039] At this time, the circuit of the DC electrical appliance (3) is closed, and the mechanical switch (4) is in a closed state.

[0040] Preferably, the latch (8) controls the mechanical switch activation mechanism (7) in the DC socket (1) to actuate, thereby controlling the mechanical switch (4) from closed to open, comprising:

[0041] As the DC plug (1) is pulled out, the second spring (14) returns to its original length and simultaneously pops out the mechanical switch actuating mechanism (7) to drive the mechanical switch (4) from closed to open.

[0042] Preferably, as the DC plug (2) continues to be pulled out until it is completely separated, the latch (8) triggers the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection, including:

[0043] The DC plug (2) is completely separated from the DC socket (1), the first spring (15) returns to its original length, and while popping out the load switch starting mechanism (13), it drives the switch 16 from disconnection to connection, thereby triggering the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection.

[0044] Compared with the closest prior art, the present invention has the following beneficial effects:

[0045] 1. The present invention provides a DC plug-and-socket DC plug-in device, comprising: a DC socket (1), a DC plug (2) and a DC electrical appliance (3); a mechanical switch (4) and a mechanical switch starting mechanism (7) are provided in the DC socket (1), and the mechanical switch starting mechanism (7) is connected to the mechanical switch (4); a latch (8) is provided in the DC plug (2); a load starting mechanism (9) is provided in the DC electrical appliance (3); the latch (8) is in contact with and connected to the load starting mechanism (9) and the mechanical switch starting mechanism (7) respectively; the latch (8) controls the opening / closing of the load starting mechanism (9) and controls the opening / closing of the mechanical switch (4) by controlling the mechanical switch starting mechanism (7); the present invention realizes arc-free plugging and disconnection of the plug and socket, avoids arc burning, and prolongs the service life of the DC plug and socket.

[0046] 2. The present invention provides a method for inserting a plug into a DC socket in an arc-extinguished state, comprising: as the DC plug (2) is inserted, a latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected; the latch (8) controls the mechanical switch starting mechanism (7) in the DC socket (1) to operate, thereby controlling the mechanical switch (4) from being disconnected to being closed; as the DC plug (2) continues to be inserted until it is fully pushed into place, the latch (8) connects the DC electrical appliance (3), and at the same time, the latch (8) triggers the load starting mechanism (9) to be closed, and the DC electrical appliance (3) is energized; the method realizes arc-free plugging of the plug and the socket, avoids arc burning when the plug is inserted into the socket, and prolongs the service life of the DC plug and the socket.

[0047] 3. The present invention provides a method for pulling out a plug from a DC socket in an arc-extinguished state, comprising: as the DC plug (2) is pulled out, a latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected; the latch (8) controls the mechanical switch starting mechanism (7) in the DC socket (1) to operate, thereby controlling the mechanical switch (4) from being closed to being disconnected; as the DC plug (2) continues to be pulled out until it is completely separated, the latch (8) triggers the load starting mechanism (9) to control the DC electrical appliance (3) from being disconnected to being connected; the method realizes arc-free separation of the plug and the socket, avoids arc burning when the plug is pulled out of the socket, and prolongs the service life of the DC plug and the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 : Schematic diagram of the DC plug-in device of the plug and socket of the present invention;

[0049] Figure 2 : Schematic diagram of the DC plug-in device of the present invention;

[0050] Figure 3 : Schematic diagram of the method of inserting a plug into a DC socket in an arc-extinguished state according to the present invention;

[0051] Figure 4 : Schematic diagram of the implementation of the method of inserting a plug into a DC socket in an arc-extinguished state according to the present invention;

[0052] Figure 5 : Schematic diagram of a method for pulling out a plug from a DC socket in an arc-extinguished state according to the present invention;

[0053] Figure 6 : Schematic diagram of the implementation of the method for pulling out a plug from a DC socket in an arc-extinguished state according to the present invention;

[0054] Figure 7 : Schematic diagram of an application device of the DC plug-and-socket device of the present invention;

[0055] Figure 8 : Schematic diagram of the first state of the application device of the DC plug-and-socket device of the present invention;

[0056] Figure 9 : Schematic diagram of the application device of the DC plug-and-socket device of the present invention in the second state;

[0057] Figure 10 : Schematic diagram of the application device of the DC plug-and-socket device of the present invention in the third state;

[0058] Figure 11 : Schematic diagram of the application device of the DC plug-and-socket device of the present invention in the fourth state;

[0059] Figure 12 : Schematic diagram of the fifth state of the application device of the DC plug-and-socket device of the present invention;

[0060] Figure 13 : Schematic diagram of the prior art plugging method using only a socket mechanical switch;

[0061] Reference numerals:

[0062] 1-DC socket, 2-DC plug, 3-DC electrical appliance, 4-mechanical switch, 5-plug conductive insert, 6-socket jack contact piece, 7-linked switch starting mechanism, 8-lock, 9-load starting mechanism, 10-DC electrical load, 11-DC wire, 12-load starting control circuit wire, 13-load switch starting mechanism, 14-second spring, 15-first spring, 16-switch, 131-first edge, 132-first groove, 133-first protrusion. DETAILED DESCRIPTION

[0063] In order to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0064] Example 1

[0065] The present invention provides a DC plug-in device for a plug and a socket, such as Figure 1 As shown, a mechanical switch 4 is provided in the socket, and is controlled to be on and off by a mechanical starting mechanism 7; an electronic switch mechanism 9 is provided in the DC electrical appliance to control the start and stop of the load 10; a linkage switch 8 with a locking function is provided in the plug connected to the electrical appliance via a DC conductor 11, which can control the mechanical switch 4 in the socket and the load 10 of the DC electrical appliance at the same time, and realizes reliable plugging of the plug and the socket by mutual locking, thereby avoiding poor contact caused by loose plugging and thus generating arcs that endanger electrical safety.

[0066] Specifically, such as Figure 2 As shown, a DC plug-and-socket DC plug-in device comprises: a DC socket 1, a DC plug 2, and a DC electrical appliance 3; the DC socket 1 is provided with a mechanical switch 4 and a mechanical switch activation mechanism 7, and the mechanical switch activation mechanism 7 is connected to the mechanical switch 4; the DC plug 2 is provided with a latch 8; the DC electrical appliance 3 is provided with a load activation mechanism 9; the latch 8 is in contact with and connected to the load activation mechanism 9 and the mechanical switch activation mechanism 7, respectively; the latch 8 controls the opening / closing of the load activation mechanism 9 and the opening / closing of the mechanical switch 4 by controlling the mechanical switch activation mechanism 7 to extinguish arcs during the plug-in process.

[0067] The latch 8 includes: a load switch starting mechanism 13, a switch 16 and a first spring 15; one side of the load switch starting mechanism 13 is fixedly connected to the first spring 15; a recess is provided on the side wall of the DC plug 2, and the side of the load switch starting mechanism 13 connected to the first spring 15 and the first spring 15 enter the recess; the load switch starting mechanism 13 is in contact with the load starting mechanism 9 through the switch 16.

[0068] The switch 16 is a contact switch; the load switch starting mechanism 13 is connected to the moving contact of the switch 16, and the static contact of the switch 16 is connected to the load starting mechanism 9.

[0069] The DC socket 1 also includes a second spring 14; the second spring 14 is fixedly connected between the mechanical switch activation mechanism 7 and the inner wall of the bottom shell of the DC socket 1; the size of the DC socket 1 socket is adapted to the size of the DC plug 2, and the shell at the socket has a first protrusion 133 that matches the first groove 132 of the latch 8, which is used to lock the latch 8 when the DC plug 2 is fully inserted; the mechanical switch activation mechanism 7 and the second spring 14 are arranged in the socket of the DC socket 1 and are located below the first protrusion 133. When the second spring 14 is in a free state, the first protrusion 133 contacts the mechanical switch activation mechanism 7.

[0070] The mechanical switch 4 is a contact plug; the moving contact of the mechanical switch 4 is fixedly connected to the mechanical switch starting mechanism 7; and the static contact of the mechanical switch 4 is connected to the power supply.

[0071] The length of the first side 131 of the load switch starting mechanism 13 is greater than the maximum distance between the static contact and the moving contact of the mechanical switch 4 .

[0072] Example 2

[0073] A method based on inserting a plug into a DC socket in an arc-extinguished state, such as Figure 3 As shown, including:

[0074] Step 1: As the DC plug 2 is inserted, the latch 8 on the DC plug 2 controls the DC electrical appliance 3 from being connected to being disconnected;

[0075] Step 2: The latch 8 controls the mechanical switch activation mechanism 7 in the DC socket 1 to actuate, thereby controlling the mechanical switch 4 from being opened to being closed;

[0076] Step 3: As the DC plug 2 continues to be inserted until it is fully pushed into place, the latch 8 is connected to the DC electrical appliance 3. At the same time, the latch 8 triggers the load starting mechanism 9 to close, and the DC electrical appliance 3 is energized.

[0077] Step 1 includes: the latch 8 enters the recess on the side wall of the DC plug 2, compressing the first spring 15 and driving the switch 16 from closed to open; at this time, the circuit in the DC electrical appliance 3 is closed and the mechanical switch 4 is in the open state.

[0078] Step 2 includes: as the DC plug 1 enters, the latch 8 pushes the mechanical switch activation mechanism 7 toward the second spring 14, compressing the second spring 14 and driving the mechanical switch 4 to close.

[0079] Step three includes: continuing to insert the DC plug 2 until it is fully inserted into place. At this time, the first protrusion 131 of the DC socket 1 enters the first recess 132 of the latch 8, the first spring 15 returns to its original length, and simultaneously pops out the load switch starting mechanism 13 and drives the switch 16 from open to closed, triggering the load starting mechanism 9 to control the circuit of the DC electrical appliance 3 to energize the DC electrical appliance.

[0080] Specifically, such as Figure 4 As shown, when a DC appliance plug is connected to a DC power socket: before the plug 2 is inserted into the socket of the socket 1, the mechanical linkage switch 4 inside the socket 1 is in the off state; as the plug is pushed into the socket, the latch 8 first triggers the linkage switch starting mechanism 7, causing the mechanical linkage switch 4 to close, and the socket outputs a DC voltage; as the plug 2 is fully pushed into place, the latch 8 locks and engages, achieving a reliable connection between the DC plug 2 and the DC socket 1, and triggers the load starting mechanism 9 to turn on the load 10, connecting the load power circuit so that the load circuit is energized, and the DC conductor 11 can flow DC current.

[0081] Example 3

[0082] A method for pulling out a plug from a DC socket in an arc-extinguishing state, such as Figure 5 As shown, including:

[0083] Step A: As the DC plug 2 is pulled out, the latch 8 on the DC plug 2 controls the DC electrical appliance 3 from being connected to being disconnected;

[0084] Step B: The latch 8 controls the mechanical switch activation mechanism 7 in the DC socket 1 to actuate, thereby controlling the mechanical switch 4 from closed to open;

[0085] Step C: As the DC plug 2 continues to be pulled out until it is completely separated, the latch 8 triggers the load starting mechanism 9 to control the DC electrical appliance 3 from disconnection to connection.

[0086] Step A includes: the latch 8 enters the recess on the side wall of the DC plug 2, compressing the first spring 15 and driving the switch 16 from closed to open; at this time, the circuit of the DC electrical appliance 3 is closed and the mechanical switch 4 is in the closed state.

[0087] Step B includes: as the DC plug 1 is pulled out, the second spring 14 returns to its original length and simultaneously pops out the mechanical switch actuating mechanism 7 and drives the mechanical switch 4 from closed to open.

[0088] Step C includes: the DC plug 2 is completely separated from the DC socket 1, the first spring 15 returns to its original length, and while popping out the load switch starting mechanism 13, it drives the switch 16 from open to closed, thereby triggering the load starting mechanism 9 to control the DC electrical appliance 3 from open to connected.

[0089] Specifically, such as Figure 6 As shown, when the DC appliance plug is separated from the DC power socket: before the plug 2 is removed and inserted into the socket 1, the mechanical linkage switch 4 inside the socket 1 is in the closed state; if the plug 2 is removed, the latch 8 needs to be disengaged. As the latch 8 is disengaged, the load starting mechanism 9 triggers the load 10 to be turned off, the load circuit is closed, and the current in the DC conductor 11 drops to zero; as the plug 2 is removed, the latch 8 triggers the linkage switch mechanism 7 to open the mechanical linkage switch 4, and the socket has no DC voltage output; the plug 2 is continued to be removed until it is safely and completely separated from the DC socket 1.

[0090] Example 4

[0091] like Figure 7 As shown, the application device of the DC plug-in device of the present invention is used, in which the locking mechanism 8 cooperates with the two switch starting mechanisms 7 and 13 to realize orderly control of the DC electrical load 10 and the socket mechanical linkage switch 4.

[0092] A load switch activation mechanism 13, in the form of a mechanical switch, is located on the DC plug 2. A spring provides an outward force, causing it to extend naturally and close a switch 16. This, in turn, opens the load activation mechanism 9. This controls the DC electrical circuit via the load activation control circuit conductor 12, enabling the DC electrical load 10 to operate. When the load switch activation mechanism 13 is pressed, the switch 16 opens, disabling the corresponding DC load 10 and preventing it from generating load current.

[0093] A linkage switch activation mechanism 7 is located at the latch 8 on the DC socket 1. A spring forces it outward in its natural position, disengaging the mechanical linkage switch 4. Pressing the linkage switch activation mechanism 7 closes the mechanical linkage switch 4, energizing the corresponding socket contact 6 and outputting a DC voltage.

[0094] This application device has five working states, including:

[0095] like Figure 8 As shown, when the device is in the first state, the DC plug 2 and the DC socket 1 are in a separated state, the DC socket 1 has no DC voltage output, the DC load is in an operational state, and there is no arc risk;

[0096] like Figure 9 As shown, when the device is in the second state, the DC plug 2 begins to be inserted into the DC socket 1, and the load switch starting mechanism 13 needs to be pressed to allow the DC plug 2 to pass the latch 8 and connect to the DC socket 1. At this time, the DC load is in an inoperative state, and the DC socket has no DC voltage output, so there is no arc risk.

[0097] like Figure 10 As shown, when the device is in the third state, the DC plug 2 passes the latch 8 and presses the pressure linkage switch activation mechanism 7 on the socket, so that the mechanical linkage switch 4 is closed. At this time, the DC socket jack contact piece 6 is energized and the DC load is in an inoperative state. There is no DC current output and no arc risk.

[0098] like Figure 11 As shown, when the device is in the fourth state, the DC plug 2 passes the latch 8 and is reliably connected to the DC socket 1, the plug conductive blade 5 is reliably in contact with the socket contact blade 6, and the load switch activation mechanism 13 on the plug is in a pressed state. At this time, the DC load is energized and in an inoperative state, there is no DC current output, and there is no arc risk;

[0099] like Figure 12 As shown, when the device is in the fifth state, the DC plug 2 passes the latch 8 and is reliably connected to the DC socket 1, the conductive plug 5 of the plug is reliably in contact with the contact piece 6 of the socket, and the load switch starting mechanism 13 on the plug is ejected by the spring 15. At this time, the DC load is energized and in an operable state.

[0100] based on Figures 8 to 12 Regarding the connection state between the DC plug and the socket, for a method of inserting a plug into a DC socket in an arc-extinguished state as shown in Example 2, the process state is as follows: Figure 8 → Figure 9 → Figure 10 → Figure 11 → Figure 12For a method of pulling out a plug from a DC socket in an arc-extinguished state as shown in Example 3, the process state is: Figure 12 → Figure 11 → Figure 10 → Figure 9 → Figure 8 .

[0101] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0102] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0103] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0105] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A DC plug-and-socket device, characterized in that: include: A DC socket (1), a DC plug (2) and a DC electrical appliance (3); The DC socket (1) is provided with a mechanical switch (4) and a mechanical switch starting mechanism (7), and the mechanical switch starting mechanism (7) is connected to the mechanical switch (4); the DC plug (2) is provided with a latch (8); and the DC electrical appliance (3) is provided with a load starting mechanism (9); The latch (8) is in contact with and connected to the load starting mechanism (9) and the mechanical switch starting mechanism (7) respectively; The latch (8) controls the opening / closing of the load starting mechanism (9) and controls the opening / closing of the mechanical switch starting mechanism (7) and the mechanical switch (4) to achieve arc extinguishing during the plugging process; The latch (8) includes: a load switch starting mechanism (13), a switch (16) and a first spring (15); One side of the load switch starting mechanism (13) is fixedly connected to the first spring (15); The side wall of the DC plug (2) has a recess, and a side of the load switch starting mechanism (13) connected to the first spring (15) and the first spring (15) enter the recess; The load switch starting mechanism (13) is in contact with the load starting mechanism (9) via the switch (16); The DC socket (1) further comprises a second spring (14); the second spring (14) is fixedly connected between the mechanical switch starting mechanism (7) and the inner wall of the bottom shell of the DC socket (1); The size of the DC socket (1) socket is adapted to the size of the DC plug (2), and the housing at the socket has a first protrusion (133) that matches the first groove (132) of the latch (8), and is used to lock the latch (8) when the DC plug (2) is fully inserted; The mechanical switch starting mechanism (7) and the second spring (14) are arranged in the socket of the DC socket (1) and are located below the first protrusion (133); when the second spring (14) is in a free state, the first protrusion (133) contacts the mechanical switch starting mechanism (7).

2. A DC plug-and-socket device according to claim 1, characterized in that: The switch (16) is a contact switch; The load switch starting mechanism (13) is connected to the moving contact of the switch (16), and the static contact of the switch (16) is connected to the load starting mechanism (9).

3. A DC plug-and-socket device according to claim 1, characterized in that: The mechanical switch (4) is a contact plug; The moving contact of the mechanical switch (4) is fixedly connected to the mechanical switch starting mechanism (7); and the static contact of the mechanical switch (4) is connected to a power source.

4. A DC plug-and-socket device according to claim 3, characterized in that: The length of the first side (131) of the load switch starting mechanism (13) is greater than the maximum distance between the static contact and the moving contact of the mechanical switch (4).

5. A method for inserting a plug into a DC socket in an arc-extinguished state, for using the device according to any one of claims 1 to 4, characterized in that: include: As the DC plug (2) is inserted, the latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected; The latch (8) controls the mechanical switch starter (7) in the DC socket (1) to actuate, thereby controlling the mechanical switch (4) from being opened to being closed; As the DC plug (2) continues to be inserted until it is fully pushed into place, the latch (8) is connected to the DC electrical appliance (3), and at the same time, the latch (8) triggers the load starting mechanism (9) to close, and the DC electrical appliance (3) is energized.

6. The method for inserting a plug into a DC socket in an arc-extinguished state according to claim 5, characterized in that: The latch (8) on the DC plug (2) controls the DC electrical appliance (3) from connection to disconnection, including: The latch (8) enters the recess on the side wall of the DC plug (2), compressing the first spring (15) and driving the switch (16) from closed to open; At this time, the circuit in the DC electrical appliance (3) is closed, and the mechanical switch (4) is in the disconnected state.

7. The method for inserting a plug into a DC socket in an arc-extinguished state according to claim 5, characterized in that: The latch (8) controls the action of the mechanical switch starter mechanism (7) in the DC socket (1), thereby controlling the mechanical switch (4) from opening to closing, including: As the DC plug (2) enters, the latch (8) pushes the mechanical switch starter mechanism (7) forward in the direction of the second spring (14), compressing the second spring (14) and driving the mechanical switch (4) to close.

8. The method for inserting a plug into a DC socket in an arc-extinguished state according to claim 5, characterized in that: As the DC plug (2) continues to be inserted until it is fully pushed into place, the DC electrical appliance (3) is connected, and at the same time, the latch (8) triggers the load starting mechanism (9) to close, including: The DC plug (2) is inserted further until it is fully pushed into place, at which point the first protrusion (133) of the DC socket (1) enters the first groove (132) of the latch (8), the first spring (15) returns to its original length, and while the load switch starting mechanism (13) is popped out, it drives the switch (16) from open to closed, triggering the load starting mechanism (9) to control the DC electrical appliance (3) to energize the circuit of the DC electrical appliance.

9. A method for removing a plug from a DC socket in an arc-extinguished state, using the device according to any one of claims 1 to 4, characterized in that: include: As the DC plug (2) is pulled out, the latch (8) on the DC plug (2) controls the DC electrical appliance (3) from being connected to being disconnected; The latch (8) controls the mechanical switch starter (7) in the DC socket (1) to actuate, thereby controlling the mechanical switch (4) from closed to open; As the DC plug (2) continues to be pulled out until it is completely separated, the latch (8) triggers the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection.

10. The method for removing a plug from a DC socket in an arc-extinguished state according to claim 9, characterized in that: The lock (8) on the DC plug (2) controls the connection to and disconnection between the DC electrical appliance (3), including: The latch (8) enters the recess on the side wall of the DC plug (2), compressing the first spring (15) and driving the switch (16) from closed to open; At this time, the circuit of the DC electrical appliance (3) is closed, and the mechanical switch (4) is in a closed state.

11. The method for removing a plug from a DC socket in an arc-extinguished state according to claim 9, characterized in that: The latch (8) controls the mechanical switch starter (7) in the DC socket (1) to operate, thereby controlling the mechanical switch (4) from closed to open, including: As the DC plug (2) is pulled out, the second spring (14) returns to its original length and simultaneously ejects the mechanical switch actuating mechanism (7) and drives the mechanical switch (4) from closed to open.

12. The method for removing a plug from a DC socket in an arc-extinguished state according to claim 9, wherein: As the DC plug (2) continues to be pulled out until it is completely separated, the latch (8) triggers the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection, including: The DC plug (2) is completely separated from the DC socket (1), the first spring (15) returns to its original length, and while popping out the load switch starting mechanism (13), it drives the switch (16) from disconnection to closing, thereby triggering the load starting mechanism (9) to control the DC electrical appliance (3) from disconnection to connection.

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