Plug-in structure and direct-current plug-in equipment

Abstract

The utility model relates to a plug-in structure and direct-current plug-in equipment. The plugging structure comprises a DC plug and a DC socket in plugging cooperation with the DC plug. The direct current plug comprises a plug base and a plug conductor section, and the plug conductor section is arranged on the plug base; the direct-current socket comprises a socket base, a first conductor section, a second conductor section, a current stabilization assembly and a delay disconnection assembly, the socket base is provided with a jack, the first conductor section and the second conductor section are arranged on the inner wall of the jack at an interval, and the second conductor section is electrically connected with a direct-current power supply; the current stabilization assembly is electrically connected with the first conductor section and the second conductor section and used for increasing impedance of a power supply loop in the insertion process of the plug conductor section; the time-delay disconnection assembly is arranged in the socket base and used for enabling the plug conductor section to be disconnected with the second conductor section in a time-delay mode when the plug conductor section is separated from the current stabilization assembly. Therefore, the impact current can be limited when the direct-current power supply is inserted into the direct-current socket, and direct-current arc discharge can be prevented when the direct-current plug is pulled out of the direct-current socket.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a plug-in structure and a DC plug-in device. Background Art

[0002] With the rapid development of new energy technologies, DC microgrids, and DC-powered smart buildings, DC systems are becoming more and more widely used, and the proportion of DC power equipment in power loads is increasing year by year. DC power equipment is powered by a DC system. Compared with an AC power supply system, DC power has no voltage zero point, and DC switches are prone to arcing during the opening and closing process, and are not easy to extinguish.

[0003] The technical routes of DC switch products on the market currently have different solutions according to different application scenarios, and can be roughly divided into two categories: safe extra-low voltage DC switch products, such as DC5V, DC12V, DC24V, etc. Considering the low voltage level, the probability of arcing during the opening and closing process of the switch is small, and the arcing hazard is low, so the arc extinguishing problem is not considered in the product design. For other higher voltage DC switch products, arc extinguishing chambers are designed in the contact part of the switch. Through additional arc extinguishing measures, the DC switch can effectively and safely disconnect the DC circuit during use.

[0004] At present, the arc extinguishing technology route of DC switches mostly considers designing an arc extinguishing chamber in the switch contact part. The additional arc extinguishing measures make the product cost higher and increase the complexity of the DC switch structure. Moreover, each arc extinguishing in the arc extinguishing chamber consumes the service life of the product, and the product failure rate is high, which affects the performance of the DC switch. Summary of the invention

[0005] Based on this, it is necessary to provide a plug-in structure and a DC plug-in device to address the problems of high cost and high product failure rate when setting an arc extinguishing chamber in the current DC switch to eliminate arcing, which can delay disconnection during the unplugging process to prevent DC arcing. Moreover, it does not require the setting of an arc extinguishing chamber, has a simple structure, low implementation cost, and high reliability, effectively extending the service life of the plug-in structure and ensuring the performance of the plug-in structure.

[0006] A plug-in structure, comprising a DC plug and a DC socket plugged with the DC plug;

[0007] The DC plug comprises a plug base and a plug conductor segment, wherein the plug conductor segment is arranged on the plug base;

[0008] The DC socket comprises a socket base, a first conductor segment, a second conductor segment, a current stabilizing component and a time-delay disconnection component, wherein the socket base has a socket matched with the plug conductor segment, the first conductor segment and the second conductor segment are arranged at intervals on the inner wall of the socket, and the first conductor segment is located at the opening of the socket, and the second conductor segment is electrically connected to a DC power source;

[0009] The current stabilizing component electrically connects the first conductor segment and the second conductor segment, and is used to increase the impedance of the power supply circuit during the insertion of the plug conductor segment;

[0010] The time-delay disconnection component is arranged in the socket base, and is used to delay the disconnection of the plug conductor segment from the second conductor segment when the plug conductor segment is separated from the current stabilizing component.

[0011] In an embodiment of the present application, the current stabilization component includes a capacitor element, one end of the capacitor element is electrically connected to the first conductor segment, and the other end of the capacitor element is electrically connected to the second conductor segment.

[0012] In an embodiment of the present application, the current stabilizing component further includes a resistor segment, which is disposed between the second conductor segment and the capacitor element and electrically connects the second conductor segment and the capacitor element.

[0013] In one embodiment of the present application, the delayed disconnection component includes a delayed driving component and a limiting component, the delayed driving component is arranged on the socket base, the limiting component is movably arranged on the socket base, and the delayed driving component can drive the limiting component to extend into or move out of the socket, and the limiting component can press the plug conductor segment after extending into the socket to limit the removal of the plug conductor segment.

[0014] In an embodiment of the present application, an end of the plug conductor segment away from the plug base has a limiting groove, and the limiting component can be clamped in the limiting groove to limit the removal of the plug conductor segment.

[0015] In one embodiment of the present application, the end of the plug conductor segment away from the plug base has a first guide surface, and the first guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the plug hole;

[0016] And / or, the inner wall surface of the limiting groove facing the DC socket is a second guide surface, and the second guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the jack;

[0017] And / or, the inner wall surface of the limiting groove facing away from the DC socket is a stop surface, and the stop surface is used to stop the limiting component and guide the plug conductor segment to move along the limiting component when the plug conductor segment moves out of the plug hole;

[0018] And / or, the surface of the limiting component facing the DC plug has a third guide surface, and the third guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the plug hole.

[0019] In one embodiment of the present application, the delay driving component includes an operation button and a transmission member, wherein the operation button is disposed on the socket base and at least partially exposed from the socket base, one end of the transmission member is connected to the operation button, and the other end of the transmission member is connected to the limiting member, and the operation button can drive the transmission member to drive the limiting member to extend into or move out of the socket;

[0020] The delay driving component also includes an elastic member, which is arranged on the socket base and abuts against the limiting component. The elastic member can provide a force for the limiting component to extend into the jack so that the limiting component presses the plug conductor segment.

[0021] In one embodiment of the present application, the delayed driving component is a time relay, which is arranged in the socket base and connected to the limiting component. The time relay can drive the limiting component to move out of the socket after a predetermined time to disengage from the plug conductor segment.

[0022] In one embodiment of the present application, the DC socket also includes a fastening spring sheet, which is arranged on the inner wall of the socket and is arranged opposite to the current stabilizing component. The fastening spring sheet can press the plug conductor segment so that the plug conductor segment fits the second conductor segment and the current stabilizing component in the socket.

[0023] A DC plug-in device, comprising a DC load and a plug-in structure as described in any one of the above technical features, wherein a plug of the plug-in structure is arranged on the DC load and can be plugged and installed in a socket to provide DC power for the DC load;

[0024] The DC load has a voltage stabilizing capacitor connected in parallel therein.

[0025] After adopting the above technical solution, this application has at least the following technical effects:

[0026] The plug-in structure and DC plug-in device of the present application, in which the DC plug cooperates with the DC socket, and the plug conductor segment of the DC plug can be plugged and installed in the socket of the socket base of the DC socket. The first conductor segment and the second conductor segment are arranged on the inner wall of the socket at intervals, and the first conductor segment is located at the opening of the socket, the second conductor segment is electrically connected to the DC power supply, and the two ends of the current stabilization component are electrically connected to the first conductor segment and the second conductor segment. The current stabilization component can increase the impedance of the power supply circuit during the process of inserting the plug conductor segment into the socket, so as to avoid the impact current generated by the direct connection of the DC load to the DC power supply. Moreover, when the plug conductor segment is pulled out of the socket, after the plug conductor segment is separated from the current stabilization component, the delayed disconnection component can limit the plug conductor segment, so that the plug conductor segment can be separated from the second conductor segment after a predetermined time.

[0027] The plug-in structure can automatically connect to the current stabilizing component according to the plug-in and pull-out action of the DC plug and the DC socket. When the DC power supply is plugged into the DC socket, the current stabilizing component can effectively limit the impact current. When the DC plug is pulled out of the DC socket, the disconnection time between the plug conductor segment and the DC socket is limited by the time-delay disconnection component to prevent DC arcing. The plug-in structure of the present application directly sets the current stabilizing component in the first conductor segment and the second conductor segment, and sets the time-delay disconnection component in the socket base. It does not need to set an arc extinguishing chamber, has a simple structure, low implementation cost, and has high reliability, effectively prolongs the service life of the plug-in structure, and ensures the performance of the plug-in structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a plug-in structure according to an embodiment of the present application.

[0029] Figure 2 for Figure 1 The plug-in structure is shown in a schematic diagram in a first insertion stage.

[0030] Figure 3 for Figure 2 The plug-in structure is shown in a schematic diagram in the second insertion stage.

[0031] Figure 4 for Figure 3 The plug-in structure shown is in a schematic diagram in the third insertion stage.

[0032] Figure 5 for Figure 4 The plug structure shown is in the first unplugging stage.

[0033] Figure 6 for Figure 5 The plug-in structure shown is in the principle diagram of the second unplugging stage.

[0034] Figure 7 for Figure 6The plug-in structure shown is in the third unplugging stage.

[0035] Wherein: 10, plug structure; 100, DC plug; 110, plug base; 120, plug conductor segment; 121, limit groove; 122, first guide surface; 123, second guide surface; 124, stop surface; 200, DC socket; 210, socket base; 211, jack; 220, first conductor segment; 230, second conductor segment; 240, current stabilizing component; 241, capacitor element; 242, resistor segment; 250, time-delay disconnection component; 251, time-delay drive component; 2511, operation button; 2512, transmission member; 2513, elastic member; 252, limit component; 2521, third guide surface; 260, positive DC power line; 270, fastening spring; 30, DC load; 310, voltage stabilizing capacitor. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0042] See also Figure 1 , the present application provides a plug-in structure 10. Figure 1 This is a schematic diagram of a plug-in structure 10 of an embodiment of the present application. The plug-in structure 10 is applied to a DC plug-in device. The plug-in structure 10 can connect a DC load 30 to a DC power supply, and power the DC load 30 through the DC power supply to ensure the operation of the DC load 30. It is worth noting that the DC load 30 can be various types of DC power-consuming devices, and the present application only uses the DC load 30 as a substitute.

[0043] It is understandable that the current arc extinguishing technology route of DC switches mostly considers designing an arc extinguishing chamber in the switch contact part. The additional arc extinguishing measures make the product cost higher and increase the complexity of the DC switch structure; moreover, each arc extinguishing of the arc extinguishing chamber consumes the service life of the product, and the product failure rate is high, which affects the performance of the DC switch. To this end, the present application provides a new plug-in structure 10, which can limit the impact current during the plug-in process, delay disconnection during the unplugging process to prevent DC arcing, and its structure is simple, the implementation cost is low, and it has high reliability to extend the service life of the plug-in structure 10. The specific structure of the plug-in structure 10 of an embodiment is introduced below.

[0044] See also Figure 1 In one embodiment, the plug structure 10 includes a DC plug 100 and a DC socket 200 plugged with the DC plug 100. The DC plug 100 includes a plug base 110 and a plug conductor segment 120, and the plug conductor segment 120 is arranged on the plug base 110. The DC socket 200 includes a socket base 210, a first conductor segment 220, a second conductor segment 230, a current stabilizing component 240 and a time-delay disconnection component 250. The socket base 210 has a socket 211 that matches the plug conductor segment 120. The first conductor segment 220 and the second conductor segment 230 are arranged at intervals on the inner wall of the socket 211, and the first conductor segment 220 is located at the opening of the socket 211. The second conductor segment 230 is electrically connected to a DC power source. The current stabilizing component 240 electrically connects the first conductor segment 220 and the second conductor segment 230, and is used to increase the impedance of the power supply circuit during the insertion of the plug conductor segment 120. The time-delay disconnection component 250 is disposed in the socket base 210 , and is used to delay the disconnection of the plug conductor segment 120 from the second conductor segment 230 when the plug conductor segment 120 is separated from the current stabilizing component 240 .

[0045] The DC socket 200 and the DC plug 100 are the main structures of the plug-in structure 10. The DC plug 100 can be plugged into the DC socket 200. The DC socket 200 and the DC power source (such as Figure 1 The DC plug 100 is electrically connected to the DC load 30 (at the positive and negative electrodes shown on the left). When the DC plug 100 is inserted into the DC socket 200, the DC plug 100 and the DC socket 200 are plugged together to connect the DC load 30 and the DC power supply, so that DC power is supplied to the DC load 30. When the DC plug 100 is pulled out of the DC socket 200, a circuit is formed between the DC plug 100 and the DC socket 200.

[0046] The DC plug 100 includes a plug base 110 and a plug conductor segment 120. The plug conductor segment 120 is disposed on one side of the plug base 110. The other end of the plug conductor segment 120 is electrically connected to the DC load 30 through a lead wire. The DC plug 100 includes a socket base 210 and a first conductor segment 220. The socket base 210 has a plug hole 211. The second conductor segment 230 is disposed on the inner wall of the plug hole 211 and is electrically connected to a DC power source. The plug conductor segment 120 can be plugged in and out of the plug hole 211 to be electrically connected to the second conductor segment 230.

[0047] It is worth noting that there are two plug conductor segments 120, which are symmetrically arranged, one of which is a positive segment, and the other is a negative segment, and the positive segment and the negative segment have the same structure. Correspondingly, the socket base 210 has two jacks 211, which are a positive hole and a negative hole, respectively. The DC socket 200 also includes a positive assembly and a negative assembly, and the positive assembly and the negative assembly have the same structure. The positive assembly includes a first conductor segment 220, a second conductor segment 230, a current stabilization assembly 240, and a time-delay disconnection assembly 250.

[0048] That is, the DC socket 200 includes two groups of first conductor segments 220, second conductor segments 230, current stabilization components 240, and time-delay disconnection components 250 to form a positive electrode component and a negative electrode component, respectively. The positive electrode component is disposed in the positive electrode hole, and the negative electrode component is disposed in the negative electrode hole. The second conductor segment 230 of the positive electrode component is electrically connected to the positive electrode of the DC power supply through the positive DC power line 260, and the second conductor segment 230 of the negative electrode component is electrically connected to the negative electrode of the DC power supply through the negative DC power line.

[0049] The plug conductor segment 120 of the positive segment is inserted into the positive hole, and the plug conductor segment 120 of the negative segment is inserted into the negative hole. The positive pole of the DC power source is connected to the DC load 30 through the positive DC power line 260, the second conductor segment 230 of the positive assembly, and the plug conductor segment 120 of the positive segment, forming a positive loop, and the plug conductor segment 120 of the negative segment is connected to the negative pole of the DC power source through the second conductor segment 230 of the negative assembly and the negative DC power line. In this way, the positive loop, the DC load 30, and the negative loop form a power supply loop when the plug-in structure 10 supplies power to the DC load 30.

[0050] When supplying power, the positive electrode of the DC power source is conducted to the negative electrode loop through the positive DC power line 260, the second conductor segment 230 of the positive electrode assembly, the plug conductor segment 120 of the positive electrode segment, and the DC load 30. It is worth noting that the structure and conduction principle of the negative electrode loop are substantially the same as those of the positive electrode loop. Of course, the positive electrode and the negative electrode of the DC socket 200 and the DC plug 100 are also separately arranged. In the following text, only the structure and principle of the positive electrode loop are used to explain the specific structure and principle of the plug-in structure 10, and the negative electrode loop will not be described in detail.

[0051] Specifically, the first conductor segment 220 and the second conductor segment 230 are spaced apart on an inner wall of one side of the plug hole 211, the first conductor segment 220 is located at the opening of the plug hole 211, and the second conductor segment 230 is located on the inner side of the plug hole 211. There is a certain distance between the first conductor segment 220 and the second conductor segment 230, and the current stabilizing component 240 is disposed between the first conductor segment 220 and the second conductor segment 230, and electrically connects the first conductor segment 220 and the second conductor segment 230.

[0052] The current stabilizing component 240 can limit the impact current when the plug conductor segment 120 is inserted into the jack 211, so as to reduce the impact current received by the DC load 30. During the process of inserting the plug conductor segment 120 into the jack 211, the plug conductor segment 120 gradually contacts the current stabilizing component 240, and reduces the length of the current stabilizing component 240 connected to the power supply circuit, thereby changing the magnitude of the current in the power supply circuit. When the plug conductor segment 120 is fully inserted into the jack 211, the plug conductor segment 120 is in electrical contact with the second conductor segment 230. At this time, the current stabilizing component 240 is short-circuited by the plug conductor segment 120 and is no longer connected to the power supply circuit, and will not affect the power supply of the DC load 30.

[0053] See also Figures 1 to 4 The process of inserting the plug conductor segment 120 into the jack 211 can be divided into three insertion stages, namely, a first insertion stage, a second insertion stage, and a third insertion stage. Figure 2 for Figure 1 The schematic diagram of the plug-in structure 10 shown is in the first insertion stage, Figure 3 for Figure 2 The schematic diagram of the plug-in structure 10 shown is in the second insertion stage, Figure 4 for Figure 3 The plug-in structure 10 is shown in a schematic diagram in a third insertion stage.

[0054] The plug conductor segment 120 is Figure 2 When the plug is inserted into the jack 211 in the direction shown in the figure, the plug conductor segment 120 first makes electrical contact with the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the current stabilizing component 240, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the first insertion stage, as shown in FIG. Figure 2 As the current stabilizing component 240 is fully connected to the power supply circuit, the current stabilizing component 240 can increase the impedance of the power supply circuit, effectively avoiding the impact current generated by the direct current load 30 directly connected to the direct current power supply, and ensuring the safety of the direct current load 30.

[0055] The plug conductor segment 120 is Figure 2When the plug conductor segment 120 continues to move to the left in the direction shown, the plug conductor segment 120 can be in electrical contact with the current stabilizing component 240. At this time, the positive DC power line 260, the second conductor segment 230, and the current stabilizing component 240 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the second insertion stage, as shown in FIG. Figure 3 When the plug conductor segment 120 is in electrical contact with a portion of the current stabilizing component 240, the portion of the current stabilizing component 240 will be short-circuited and no longer connected to the power supply circuit. As the plug conductor segment 120 is inserted, the current stabilizing component 240 connected to the power supply circuit gradually decreases.

[0056] The plug conductor segment 120 is Figure 3 When the plug conductor segment 120 continues to move to the left in the direction shown, the plug conductor segment 120 can be in electrical contact with the second conductor segment 230. At this time, the positive DC power line 260 and the second conductor segment 230 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is fully inserted into the jack 211 and is in the third insertion stage. Figure 4 The current stabilizing component 240 is completely short-circuited by the plug conductor segment 120 , and the power supply circuit is no longer affected by the impedance of the current stabilizing component 240 , and the DC power supply can directly supply power to the DC load 30 .

[0057] It is understandable that the DC load 30 will generate an impact current at the moment of connecting to the DC power supply. After the current stabilization component 240 is set in the DC socket 200 of the present application, the impedance of the power supply circuit changes from large to small during the process of the plug conductor segment 120 being inserted into the socket 211, which effectively suppresses the impact current at the moment of the DC load 30 connecting to the DC power supply. After the plug conductor segment 120 is fully inserted into the socket 211, the normal power supply of the DC load 30 is not affected, thereby realizing the soft power supply of the DC power supply to the DC load 30.

[0058] It is understandable that if the DC plug 100 is directly pulled out from the DC socket 200, a DC arc will occur between the DC plug 100 and the DC socket 200. In order to prevent arcing during the process of pulling out the plug conductor segment 120, the present application sets a delayed disconnection component 250 in the socket base 210, and the delayed disconnection component 250 can realize the delayed disconnection of the power supply circuit, that is, when the plug conductor segment 120 is about to be separated from the socket 211, the delayed disconnection component 250 can abut the plug conductor segment 120, so that the end of the plug conductor segment 120 can maintain a certain electrical contact relationship with the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the current stabilizing component 240, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120, and form a power supply circuit with the negative circuit. The current stabilizing component 240 can increase the impedance in the power supply circuit to reduce the current of the power supply circuit. In this way, the delayed disconnection component 250 can be separated from the plug conductor segment 120 after a predetermined time has passed. At this time, the plug conductor segment 120 can be safely disconnected from the first conductor segment 220 without the risk of DC arcing.

[0059] See also Figure 1 , Figures 5 to 7 The process of pulling out the plug conductor segment 120 from the plug hole 211 can be divided into three pulling out stages, namely a first pulling out stage, a second pulling out stage and a third pulling out stage. Figure 5 for Figure 4 The schematic diagram of the plug structure 10 shown is in the first unplugging stage, Figure 6 for Figure 5 The plug-in structure shown is in the second unplugging stage. Figure 7 for Figure 6 The plug-in structure shown is in the third unplugging stage.

[0060] The plug conductor segment 120 is Figure 5 When the plug jack 211 is pulled out to the right in the direction shown, the plug conductor segment 120 is separated from the second conductor segment 230 and is in electrical contact with the current stabilizing component 240. At this time, the positive DC power line 260, the second conductor segment 230, and the current stabilizing component 240 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. At this time, the plug conductor segment 120 is in the second unplugging stage, as shown in FIG. Figure 5 When the plug conductor segment 120 is in electrical contact with a portion of the current stabilizing component 240, the current stabilizing component 240 in that portion will be short-circuited and no longer connected to the power supply circuit. As the plug conductor segment 120 is pulled out, the current stabilizing component 240 connected to the power supply circuit gradually increases to increase the impedance of the power supply circuit and reduce the current in the power supply circuit.

[0061] The plug conductor segment 120 is Figure 5When the plug conductor segment 120 continues to move rightward in the direction shown, it is separated from the current stabilizing component 240 and electrically contacts the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the current stabilizing component 240, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the second unplugging stage, as shown in FIG. Figure 6 In this stage, the time-delay disconnection component 250 abuts against the plug conductor segment 120 , restricting the plug conductor segment 120 from being pulled out of the plug hole 211 .

[0062] Moreover, since the current stabilizing component 240 is fully connected to the power supply circuit, the current stabilizing component 240 can increase the impedance of the power supply circuit, so that the current in the power supply circuit gradually decreases to zero. Figure 6 When the plug conductor segment 120 continues to move rightward in the direction shown, it is separated from the first conductor segment 220 to be pulled out of the socket 211. At this time, the power supply circuit is disconnected. Figure 7 In this way, the plug conductor segment 120 can be safely pulled out without generating a DC arcing phenomenon.

[0063] The plug structure 10 of the above embodiment can automatically connect to the current stabilizing component 240 according to the plug-in and pull-out actions of the DC plug 100 and the DC socket 200. When the DC power source is plugged into the DC socket 200, the current stabilizing component 240 can effectively limit the impact current. When the DC plug 100 is pulled out of the DC socket 200, the disconnection time between the plug conductor segment 120 and the DC socket 200 is limited by the time-delay disconnection component 250 to prevent DC arcing. The plug structure 10 of the present application directly sets the current stabilizing component 240 in the first conductor segment 220 and the second conductor segment 230, and sets the time-delay disconnection component 250 in the socket base 210. It does not need to set an arc extinguishing chamber, has a simple structure, low implementation cost, and has high reliability, effectively prolongs the service life of the plug structure 10, and ensures the performance of the plug structure 10.

[0064] Optionally, the plug conductor segment 120 , the first conductor segment 220 , and the second conductor segment 230 are good conductors with low resistivity to ensure conductive performance.

[0065] See also Figure 1In one embodiment, the current stabilizing component 240 includes a capacitor 241, one end of the capacitor 241 is electrically connected to the first conductor segment 220, and the other end is electrically connected to the second conductor segment 230. The capacitor 241 can store charges under a given potential difference. When the plug conductor segment 120 is in electrical contact with the first conductor segment 220, the second conductor segment 230 is connected to the plug conductor segment 120 through the capacitor 241 via the first conductor segment 220. Due to the effect of the capacitor 241, the power supply circuit can limit the impact current, prevent the DC load 30 from being affected by the impact current, and ensure the safety of the power supply circuit.

[0066] See also Figure 1 In one embodiment, the current stabilizing component 240 further includes a resistor segment 242, which is disposed between the second conductor segment 230 and the capacitor element 241 and electrically connects the second conductor segment 230 and the capacitor element 241. In other words, the current stabilizing component 240 uses a combination of the resistor segment 242 and the capacitor element 241 to increase the impedance of the power supply circuit, thereby achieving the purpose of limiting the inrush current. The resistor segment 242 is disposed on the inner wall of the jack 211, and one end of the resistor segment 242 abuts against and is electrically connected to the second conductor segment 230, and the other end of the resistor segment 242 is electrically connected to the capacitor element 241.

[0067] When the plug conductor segment 120 is in the first insertion stage, the plug conductor segment 120 first electrically contacts the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the resistor segment 242, the capacitor element 241, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. Figure 2 As shown, the resistor segment 242 and the capacitor element 241 can increase the impedance of the power supply loop.

[0068] When the plug conductor segment 120 is in the second insertion stage, the plug conductor segment 120 is in electrical contact with the resistor segment 242. At this time, the positive DC power line 260, the second conductor segment 230, and the resistor segment 242 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. Figure 3 A portion of the resistor segment 242 and the capacitor element 241 are short-circuited by the plug conductor segment 120, and part of the resistor segment 242 is connected to the power supply circuit. As the plug conductor segment 120 is inserted, the resistor segment 242 connected to the power supply circuit gradually decreases to increase the circuit of the power supply circuit.

[0069] The DC socket 200 of the present application utilizes the characteristics of resistance and capacitance. When the DC plug 100 is inserted into the DC socket 200, the inrush current of the power supply circuit is limited by the resistance section 242 and the capacitance element 241. When the DC plug 100 is unplugged from the DC socket 200, the DC arc is prevented by the cooperation of the resistance section 242, the capacitance element 241 and the delayed disconnection component 250. That is, the present application utilizes the characteristics of the components of resistance and capacitance, and limits the inrush current and prevents arcing by connecting in series in the power supply circuit. Of course, in other embodiments of the present application, different combinations and different series-parallel modes of components such as capacitors, inductors and resistors can also be used, which are integrated in the DC plug 100 and / or the DC socket 200 to achieve the purpose of limiting the inrush current and preventing arcing.

[0070] See also Figure 1 In one embodiment, the delayed disconnection component 250 includes a delayed driving component 251 and a limiting component 252. The delayed driving component 251 is disposed on the socket base 210, and the limiting component 252 is movably disposed on the socket base 210. The delayed driving component 251 can drive the limiting component 252 to extend into or move out of the plug hole 211. After the limiting component 252 extends into the plug hole 211, it can press the plug conductor segment 120 to limit the removal of the plug conductor segment 120.

[0071] The limiting component 252 is movably disposed in the socket base 210, and the limiting component 252 can move in a direction perpendicular to the plug conductor segment 120. The delay driving component 251 is a power source for driving the limiting component 252. The delay driving component 251 can drive the limiting component 252 to move, and the delay driving component 251 can drive the limiting component 252 to extend into or move out of the plug hole 211. After the limiting component 252 extends into the plug hole 211, the limiting component 252 can abut against the plug conductor segment 120, and after the limiting component 252 moves out of the plug hole 211, the limiting component 252 can be separated from the plug conductor segment 120.

[0072] When the plug conductor segment 120 is about to be separated from the socket 211, the plug conductor segment 120 is in electrical contact with the first conductor segment 220. At this time, the limiting component 252 can abut the plug conductor segment 120, and the plug conductor segment 120 is limited from being removed from the socket 211 by the limiting component 252. In this way, the resistor segment 242 and the capacitor element 241 can be connected to the power supply circuit to increase the impedance of the power supply circuit and reduce the current of the power supply circuit until the current is zero. Subsequently, the delay driving component 251 can drive the limiting component 252 to move out of the socket 211, so that the limiting component 252 can be separated from the plug conductor segment 120. At this time, the plug conductor segment 120 can be pulled out of the socket 211, so that the DC plug 100 can be pulled out of the DC socket 200.

[0073] Optionally, the limiting component 252 remains inserted into the plug hole 211. That is, the limiting component 252 always remains inserted into the plug hole 211, and when the plug conductor segment 120 is inserted into the plug hole 211, the plug conductor segment 120 can move along the limiting component 252, and at this time, the limiting component 252 will not stop the insertion of the plug conductor segment 120. When the plug conductor segment 120 is pulled out of the plug hole 211 and is about to be separated from the plug hole 211, the plug conductor segment 120 is in electrical contact with the first conductor segment 220, and the limiting component 252 can abut against the plug conductor segment 120 to limit the continued movement of the plug conductor segment 120, that is, to limit the plug conductor segment 120 from being pulled out.

[0074] Of course, in other embodiments of the present application, when the plug conductor segment 120 is inserted into the jack 211, the delay driving component 251 drives the limiting component 252 to move out of the jack 211, and when the plug conductor segment 120 is pulled out of the jack 211, the delay driving component 251 drives the limiting component 252 to extend out of the jack 211. In other words, when the plug conductor segment 120 is inserted into the jack 211, the limiting component 252 is not in the jack 211, and when the plug conductor segment 120 is pulled out of the jack 211, the limiting component 252 is in the jack 211 to limit the plug conductor segment 120.

[0075] Optionally, the limiting component 252 is a limiting pin. Of course, in other embodiments of the present application, the limiting component 252 can also be a limiting baffle or other structural forms that can abut against the plug conductor segment 120 for limiting. It is worth noting that the structural form of the delay drive component 251 is not limited in principle, as long as the delay drive component 251 controls the limiting component 252 to extend into or move out of the jack 211 to limit the removal of the plug conductor segment 120. The plug conductor segment 120 can be implemented by a mechanical structure or an electronic limiting structure, which will be explained later.

[0076] See also Figure 1 In one embodiment, the end of the plug conductor segment 120 away from the plug base 110 has a limiting groove 121, and the limiting component 252 can be clamped in the limiting groove 121 to limit the removal of the plug conductor segment 120. In other words, the outer periphery of the end of the plug conductor segment 120 has a recessed limiting groove 121. When the plug conductor segment 120 is pulled out of the plug socket 211 and is about to be separated from the plug socket 211, the limiting component 252 can be clamped in the limiting groove 121. At this time, the limiting component 252 can limit the continued removal of the plug conductor segment 120 by cooperating with the limiting groove 121. At the same time, the plug conductor segment 120 is in electrical contact with the first conductor segment 220.

[0077] The effective limiting of the plug conductor segment 120 can be achieved by the cooperation between the limiting groove 121 and the limiting component 252, so as to prevent the plug conductor segment 120 from being directly pulled out of the plug conductor segment 120, and delay the pulling out of the plug conductor segment 120, so that the resistance segment 242 and the capacitor element 241 can have time to connect to the power supply circuit, so as to increase the impedance of the power supply circuit and reduce the current of the power supply circuit to zero. Subsequently, the delay driving component 251 is controlled to drive the limiting component 252 to move out of the jack 211 to disengage from the plug conductor segment 120, and the plug conductor segment 120 can be safely pulled out of the jack 211 without generating DC arcing.

[0078] See also Figure 1 In one embodiment, the end of the plug conductor segment 120 away from the plug base 110 has a first guide surface 122, and the first guide surface 122 is used to guide the plug conductor segment 120 to move along the limiting component 252 when the plug conductor segment 120 is inserted into the plug hole 211. That is, the first guide surface 122 is set at the end of the plug conductor segment 120 inserted into the plug hole 211. When the plug conductor segment 120 is inserted into the plug hole 211, the plug conductor segment 120 contacts the limiting component 252 through the first guide surface 122. During the insertion of the plug conductor segment 120, the plug guide surface can move along the limiting component 252 through the first guide surface 122, so as to facilitate the insertion of the plug conductor segment 120 into the plug hole 211. Optionally, the first guide surface 122 is an arc surface, and the plug conductor segment 120 can move along the limiting component 252 through the arc surface. Of course, in other embodiments of the present application, the first guide surface 122 can also be an inclined surface.

[0079] See also Figure 1 In one embodiment, the inner wall surface of the limiting groove 121 facing the DC socket 200 is the second guide surface 123, and the second guide surface 123 is used to guide the plug conductor segment 120 to move along the limiting component 252 when the plug conductor segment 120 is inserted into the plug hole 211. That is, the inner wall surface of the limiting groove 121 facing the DC socket 200 is the second guide surface 123. During the insertion process of the plug conductor segment 120, after the limiting component 252 is locked in the limiting groove 121, the plug conductor segment 120 continues to move, and the plug conductor segment 120 contacts the limiting component 252 through the second guide surface 123 and moves along the limiting component 252, so that the limiting component 252 can move out of the limiting groove 121, and will not affect the insertion process of the plug conductor segment 120, so as to facilitate the insertion of the plug conductor segment 120 into the plug hole 211. Optionally, the second guide surface 123 is an arc surface, and the plug conductor segment 120 can move along the limiting component 252 through the arc surface. Of course, in other embodiments of the present application, the second guide surface 123 may also be an inclined surface.

[0080] See also Figure 1In one embodiment, the inner wall surface of the limiting groove 121 facing away from the DC socket 200 is the stop surface 124, and the stop surface 124 is used to stop the limiting component 252 when the plug conductor segment 120 moves out of the plug hole 211. In other words, the surface of the limiting groove 121 opposite to the second guide surface 123 is the stop surface 124. When the plug conductor segment 120 is pulled out of the plug hole 211, the limiting component 252 can be stuck in the limiting groove 121, and the plug conductor segment 120 continues to move. The plug conductor segment 120 can abut against the stop surface 124 to limit the movement of the plug conductor segment 120. After the delay driving component 251 drives the limiting component 252 to move out of the limiting groove 121, the plug conductor segment 120 can be pulled out of the plug hole 211 safely.

[0081] See also Figure 1 In one embodiment, the limiting component 252 has a third guide surface 2521 on the side facing the DC plug 100. The third guide surface 2521 is used to guide the plug conductor segment 120 to move along the limiting component 252 when the plug conductor segment 120 is inserted into the plug hole 211. That is, the surface of the limiting component 252 facing the outside of the plug hole 211 is the third guide surface 2521. When the plug conductor segment 120 is inserted into the plug hole 211, the limiting component 252 contacts the plug conductor segment 120 through the third guide surface 2521. During the insertion of the plug conductor segment 120, the plug guide surface can move along the third guide surface 2521 of the limiting component 252, so as to facilitate the insertion of the plug conductor segment 120 into the plug hole 211. Optionally, the third guide surface 2521 is an arc surface, and the plug conductor segment 120 moves along the arc surface. Of course, in other embodiments of the present application, the third guide surface 2521 can also be an inclined surface.

[0082] See also Figure 1 In one embodiment, the delay driving component 251 uses a mechanical structure to control the movement of the limiting component 252. Here, the mechanical structure of the delay driving component 251 of one embodiment is introduced, but the mechanical structure of the delay driving component 251 is not limited to this.

[0083] See also Figure 1 In one embodiment, the delayed driving component 251 includes an operation button 2511 and a transmission member 2512. The operation button 2511 is disposed on the socket base 210 and is at least partially exposed from the socket base 210. One end of the transmission member 2512 is connected to the operation button 2511, and the other end of the transmission member 2512 is connected to the limiting component 252. The operation button 2511 can drive the transmission member 2512 to drive the limiting component 252 to extend into or move out of the socket 211.

[0084] The operation button 2511 is disposed at the edge of the socket base 210, and the end of the operation button 2511 is exposed from the socket base 210. The transmission member 2512 is movably disposed in the socket base 210, and the transmission member 2512 is transmission-connected to the limiting member 252 and the operation button 2511. In a normal state, the operation button 2511 pops out of the socket base 210, and at this time, the limiting member 252 is in a state of extending into the plug hole 211. When the plug conductor segment 120 is pulled out of the plug hole 211 and is about to be separated from the plug hole 211, the limiting member 252 is stuck in the limiting groove 121 to limit the plug conductor segment 120 from being pulled out.

[0085] After the operation button 2511 is pressed, the operation button 2511 drives the transmission member 2512 to drive the limiting member 252 to move, so that the limiting member 252 moves out of the plug hole 211. At this time, the plug conductor segment 120 can be safely pulled out of the plug hole 211. Subsequently, the operation button 2511 is released, the operation button 2511 is reset, and the limiting member 252 is reset through the transmission member 2512, so as to facilitate the next plugging and unplugging operation of the DC plug 100.

[0086] Exemplarily, the transmission member 2512 is a lever, the middle part of which is rotatably disposed on the socket base 210, one end of the lever is connected to the operating button 2511, and the other end of the lever is connected to the limiting component 252. The operating button 2511 can drive the limiting component 252 to move through the lever. Of course, in other embodiments of the present application, the transmission member 2512 can also be a connecting rod assembly or other structural forms that can realize the transmission of the movement of the operating button 2511 to the limiting component 252.

[0087] See also Figure 1 In one embodiment, the delay drive component 251 also includes an elastic member 2513, which is disposed on the socket base 210 and abuts against the limiting component 252. The elastic member 2513 can provide a force for the limiting component 252 to extend into the socket 211, so that the limiting component 252 presses against the plug conductor segment 120.

[0088] The elastic member 2513 can realize the automatic reset of the limiting member 252, which is convenient for the next plugging and unplugging operation of the DC plug 100. The elastic member 2513 is installed in the socket base 210, one end of the elastic member 2513 is fixed to the socket base 210, and the other end is connected to the limiting member 252. When the operation button 2511 drives the limiting member 252 to move out of the socket 211 through the transmission member 2512, the limiting member 252 can overcome the elastic force of the elastic member 2513 to compress the elastic member 2513 and gradually disengage from the limiting groove 121. After releasing the operation button 2511, the elastic force of the elastic member 2513 can drive the limiting member 252 to reset, so that the limiting member 252 remains in the state of extending into the socket 211.

[0089] Optionally, the elastic member 2513 is a spring. Of course, in other embodiments of the present application, the elastic member 2513 can also be an elastic column or a bellows, etc.

[0090] In one embodiment, the time delay driving component 251 can also be an electronic limiting structure, such as a time relay. The time relay is arranged in the socket base 210 and connected to the limiting component 252. The time relay can drive the limiting component 252 to move out of the socket 211 after a predetermined time to detach from the plug conductor segment 120. When the plug conductor segment 120 is in the second unplugging stage, the time relay controls the limiting component 252 to achieve delayed disconnection of the power supply circuit, so that the plug conductor segment 120 can be safely unplugged from the socket 211.

[0091] See also Figure 1 In one embodiment, the DC socket 200 further includes a fastening spring 270, which is disposed on the inner wall of the plug hole 211 and is disposed opposite to the current stabilizing component 240. The fastening spring 270 can press the plug conductor segment 120 so that the plug conductor segment 120 fits the second conductor segment 230 and the current stabilizing component 240 in the plug hole 211. The fastening spring 270 has a certain elasticity and extends toward one side of the second conductor segment 230. When the plug conductor segment 120 is inserted into the plug hole 211, the elastic force of the fastening spring 270 can press the plug conductor segment 120 so that the plug conductor segment 120 fits the second conductor segment 230, thereby preventing the plug conductor segment 120 from loosening in the plug hole 211.

[0092] In the present application, the process of inserting the DC plug 100 into the DC socket 200 is as follows:

[0093] The plug conductor segment 120 is Figure 2 When the plug is inserted into the jack 211 in the left direction as shown, the plug conductor segment 120 first makes electrical contact with the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the resistor segment 242, the capacitor element 241, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the first insertion stage, as shown in FIG. Figure 2 In the first insertion stage, the plug conductor segment 120 is just inserted into the jack 211, and the resistor segment 242 and the capacitor element 241 are connected to the power supply circuit, which can increase the impedance of the power supply circuit and reduce the current of the power supply circuit, effectively avoiding the impact current generated by the direct connection of the DC load 30 to the DC power supply, and ensuring the safety of the DC load 30.

[0094] The plug conductor segment 120 is Figure 2When the plug conductor segment 120 continues to move to the left in the direction shown, the plug conductor segment 120 can be in electrical contact with the resistor segment 242. At this time, the positive DC power line 260, the second conductor segment 230, and the resistor segment 242 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the second insertion stage, as shown in FIG. Figure 3 In the second insertion stage, the plug conductor segment 120 is in electrical contact with a portion of the resistor segment 242 and connected to the power supply circuit, while the other portion of the resistor segment 242 and the capacitor are short-circuited by the plug conductor segment 120 and are no longer connected to the power supply circuit. As the plug conductor segment 120 is inserted, the resistor segment 242 connected to the power supply circuit gradually decreases, and the current in the power supply circuit gradually increases.

[0095] The plug conductor segment 120 is Figure 3 When the plug conductor segment 120 continues to move to the left in the direction shown, the plug conductor segment 120 can be in electrical contact with the second conductor segment 230. At this time, the positive DC power line 260 and the second conductor segment 230 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is fully inserted into the jack 211 and is in the third insertion stage. Figure 4 In the third insertion stage, the resistor segment 242 and the capacitor element 241 are completely short-circuited by the plug conductor segment 120 , and the power supply circuit is not connected to any resistor or capacitor. The power supply circuit is no longer affected by the impedance of the resistor segment 242 , and the DC power supply can directly supply power to the DC load 30 .

[0096] In the present application, the process of pulling out the DC plug 100 from the DC socket 200 is as follows:

[0097] The plug conductor segment 120 is Figure 5 When the plug jack 211 is pulled out to the right in the direction shown, the plug conductor segment 120 is separated from the second conductor segment 230 and is in electrical contact with the resistor segment 242. At this time, the positive DC power line 260, the second conductor segment 230, and the resistor segment 242 are connected to the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. At this time, the plug conductor segment 120 is in the second unplugging stage, as shown in FIG. Figure 5 In the first unplugging stage, the plug conductor segment 120 is in electrical contact with a portion of the resistor segment 242 and connected to the power supply circuit, while the other portion of the resistor segment 242 and the capacitor are short-circuited by the plug conductor segment 120 and are no longer connected to the power supply circuit. As the plug conductor segment 120 is unplugged, the resistor segment 242 connected to the power supply circuit gradually increases to increase the impedance of the power supply circuit and reduce the current of the power supply circuit.

[0098] The plug conductor segment 120 is Figure 5When the plug conductor segment 120 continues to move rightward in the direction shown, it is separated from the resistor segment 242 and electrically contacts the first conductor segment 220. At this time, the positive DC power line 260, the second conductor segment 230, the resistor segment 242, the capacitor element 241, and the first conductor segment 220 conduct the DC load 30 through the plug conductor segment 120 and form a power supply loop with the negative loop. The plug conductor segment 120 is in the second unplugging stage, as shown in FIG. Figure 6 In the second unplugging stage, the resistor segment 242 and the capacitor element 241 are connected to the power supply circuit, which can increase the impedance of the power supply circuit and reduce the current of the power supply circuit. At the same time, the limiting component 252 is clamped in the limiting groove 121 of the plug conductor segment 120 to limit the plug conductor segment 120 from being unplugged from the jack 211.

[0099] Moreover, since the resistor segment 242 and the capacitor element 241 are fully connected to the power supply circuit, the resistor segment 242 and the capacitor element 241 can increase the impedance of the power supply circuit, so that the current in the power supply circuit gradually decreases to zero (the capacitor element 241 passes AC and blocks DC, and after the power supply circuit fully charges the capacitor element 241, it presents an open circuit characteristic). Press the operation button 2511, and the operation button 2511 drives the limiting component 252 to move out of the limiting groove 121 through the transmission member 2512. At this time, the power supply circuit is disconnected with a delay through the operation of the limiting component 252, and the capacitor element 241 is safely charged. Subsequently, the plug conductor segment 120 is connected along the Figure 6 When the plug conductor segment 120 continues to move rightward in the direction shown, it is separated from the first conductor segment 220 to be pulled out of the socket 211. At this time, the power supply circuit is disconnected. Figure 7 In this way, the plug conductor segment 120 can be safely pulled out without generating a DC arcing phenomenon.

[0100] The DC socket 200 is integrated with a resistor segment 242 and a capacitor element 241. When the DC plug 100 is inserted into the DC socket 200, the impedance of the power supply circuit changes from large to small, which effectively suppresses the instantaneous impact current of the DC load 30 when it is connected to the DC power supply. After the DC plug 100 is fully inserted into the DC socket 200, the normal power supply of the DC load 30 is not affected, and the DC power supply to the DC load 30 is softly powered. Moreover, when the DC plug 100 is pulled out of the DC socket 200, the current of the power supply circuit can be limited to zero, and the power supply circuit is completely disconnected without the risk of arcing.

[0101] The plug-in structure 10 of the present application adopts the ingenious design of the DC socket 200 and the DC plug 100. The power supply circuit automatically connects or cuts off the resistance section 242 and the capacitor element 241 according to the plug-in and pull-out action of the DC plug 100, so as to achieve the purpose of limiting the impact current when the DC plug 100 is inserted and preventing DC arcing when the DC plug 100 is pulled out. Moreover, the resistance section 242 is connected in series with the power supply circuit to limit the current of the power supply circuit, but it does not affect the normal operation of the DC load 30 and does not increase the power loss of the power supply circuit. The characteristic of the capacitor element 241 that it passes AC and blocks DC is utilized. The capacitor element 241 is open-circuit characteristic after the power supply circuit is charged. The capacitor element 241 is connected in series with the power supply circuit. Before the DC plug 100 is disconnected from the DC socket 200, the power supply circuit is disconnected through the capacitor element 241, and the delayed disconnection component 250 is manually operated to delay the disconnection of the power supply circuit so that the capacitor element 241 is fully charged.

[0102] The plug structure 10 utilizes the characteristics of the resistance segment 242 and the capacitor element 241 to effectively limit the overcurrent of the power supply circuit when the DC plug 100 is inserted into the DC socket 200, and prevents DC arcing when the DC plug 100 is unplugged from the DC socket 200. The plug structure 10 does not need to be provided with an arc extinguishing chamber, has a simple structure, low implementation cost, and has high reliability, effectively prolonging the service life of the plug structure 10 and ensuring the performance of the plug structure 10.

[0103] The present application also provides a DC plug-in device, including a DC load 30 and a plug-in structure 10 as any of the above technical features, wherein the plug of the plug-in structure 10 is provided on the DC load 30 and can be plugged and installed in a socket to provide DC power to the DC load 30. The DC load 30 has a parallel stabilizing capacitor 310 inside. After the parallel stabilizing capacitor 310 is connected in the DC load 30, the DC supply voltage can be stabilized. After the DC plug-in device of the present application adopts the above plug-in structure 10, the DC load 30 can be connected to the DC power supply, effectively limiting the inrush current and preventing DC arcing.

[0104] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A plug-in structure, characterized in that: It includes a DC plug and a DC socket that is plugged and matched with the DC plug; The DC plug comprises a plug base and a plug conductor segment, wherein the plug conductor segment is arranged on the plug base; The DC socket comprises a socket base, a first conductor segment, a second conductor segment, a current stabilizing component and a time-delay disconnection component, wherein the socket base has a socket matched with the plug conductor segment, the first conductor segment and the second conductor segment are arranged at intervals on the inner wall of the socket, and the first conductor segment is located at the opening of the socket, and the second conductor segment is electrically connected to a DC power source; The current stabilizing component electrically connects the first conductor segment and the second conductor segment, and is used to increase the impedance of the power supply circuit during the insertion of the plug conductor segment; The time-delay disconnection component is arranged in the socket base, and is used to delay the disconnection of the plug conductor segment from the second conductor segment when the plug conductor segment is separated from the current stabilizing component.

2. The plug-in structure according to claim 1, characterized in that: The current stabilizing component includes a capacitor element, one end of which is electrically connected to the first conductor segment, and the other end of which is electrically connected to the second conductor segment.

3. The plug-in structure according to claim 2, characterized in that: The current stabilizing component further includes a resistor segment, which is disposed between the second conductor segment and the capacitor element and electrically connects the second conductor segment and the capacitor element.

4. The plug-in structure according to claim 1, characterized in that: The delayed disconnection component includes a delayed driving component and a limiting component. The delayed driving component is arranged on the socket base, and the limiting component is movably arranged on the socket base. The delayed driving component can drive the limiting component to extend into or move out of the socket. After the limiting component extends into the socket, it can press the plug conductor segment to limit the removal of the plug conductor segment.

5. The plug-in structure according to claim 4, characterized in that: One end of the plug conductor segment away from the plug base has a limiting groove, and the limiting component can be clamped in the limiting groove to limit the removal of the plug conductor segment.

6. The plug-in structure according to claim 5, characterized in that: The end of the plug conductor segment away from the plug base has a first guide surface, and the first guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the plug hole; And / or, the inner wall surface of the limiting groove facing the DC socket is a second guide surface, and the second guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the jack; And / or, the inner wall surface of the limiting groove facing away from the DC socket is a stop surface, and the stop surface is used to stop the limiting component and guide the plug conductor segment to move along the limiting component when the plug conductor segment moves out of the plug hole; And / or, the surface of the limiting component facing the DC plug has a third guide surface, and the third guide surface is used to guide the plug conductor segment to move along the limiting component when the plug conductor segment is inserted into the plug hole.

7. The plug-in structure according to claim 5, characterized in that: The delay driving component includes an operation button and a transmission member, wherein the operation button is arranged on the socket base and at least partially exposed from the socket base, one end of the transmission member is connected to the operation button, and the other end of the transmission member is connected to the limiting member, and the operation button can drive the transmission member to drive the limiting member to extend into or move out of the socket; The delay driving component also includes an elastic member, which is arranged on the socket base and abuts against the limiting component. The elastic member can provide a force for the limiting component to extend into the jack so that the limiting component presses the plug conductor segment.

8. The plug-in structure according to claim 4, characterized in that: The time delay driving component is a time relay, which is arranged in the socket base and connected to the limit component. The time relay can drive the limit component to move out of the socket after a predetermined time to disengage from the plug conductor segment.

9. The plug-in structure according to any one of claims 1 to 8, characterized in that: The DC socket also includes a fastening spring sheet, which is arranged on the inner wall of the socket and is arranged opposite to the current stabilizing component. The fastening spring sheet can press the plug conductor segment so that the plug conductor segment fits the second conductor segment and the current stabilizing component in the socket.

10. A DC plug-in device, characterized in that: It comprises a DC load and a plug-in structure as claimed in any one of claims 1 to 9, wherein a plug of the plug-in structure is arranged on the DC load and can be plugged and installed in a socket to provide DC power for the DC load; The DC load has a voltage stabilizing capacitor connected in parallel therein.

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