Direct-current plug switch with arc extinguishing protection

Abstract

The utility model discloses a direct current plug switch with arc extinguishing protection, which comprises a plug and a socket, the socket comprises a hot plug bush, an inching switch and a direct current magnetic latching relay, and the hot plug bush is arranged on a moving contact of the inching switch and is opposite to a copper sheet on one side of the plug, so that the copper sheet on the side of the plug can be inserted into the hot plug bush through a jack. The hot plug bush is connected in series between the first output end of the power supply and the output end of the direct-current magnetic latching relay, and the output end of the direct-current magnetic latching relay is connected in series between the second output end of the power supply and the hot plug bush, so that the hot plug bush, the output end of the magnetic latching relay and the power supply form a main circuit; the inching switch is connected in series between the first output end of the power supply and the input end of the direct-current magnetic latching relay, the input end of the direct-current magnetic latching relay is connected in series between the second output end of the power supply and the inching switch, and the inching switch, the input end of the direct-current magnetic latching relay and the power supply form a loop and are connected in parallel with a circuit main loop. According to the utility model, the safety and the reliability can be improved.

Description

Technical Field

[0001] This utility model relates to a DC plug-in switch, and more particularly to a DC plug-in switch with arc extinguishing protection. Background Technology

[0002] A DC plug switch is an electrical connector used to provide DC power. For AC plugs and sockets, the AC arc generated during opening or closing can be extinguished at the zero-crossing point. However, DC power supply voltage does not have a zero-crossing point. Therefore, during the insertion and removal of a DC plug, the copper contacts are in live contact and separation, which can easily generate arcs or even sparks, posing a high risk of electric shock. In certain situations, such as in locations with flammable gases in the air, this can lead to fires or even explosions, making it extremely dangerous. Utility Model Content

[0003] The purpose of this invention is to provide a DC plug-in switch with arc-extinguishing protection that improves safety, reliability, and stability.

[0004] The objective of this utility model is achieved through the following technical measures: A DC plug-in switch with arc-extinguishing protection includes a plug and a socket. The socket has a socket hole adapted to the plug. The socket includes a live sleeve, a jog switch, and a DC magnetic latching relay. The live sleeve is disposed on the moving contact of the jog switch and faces a copper piece on one side of the plug, allowing the copper piece on that side of the plug to be inserted into the live sleeve through the socket hole. The live sleeve is connected in series between the first output terminal of the power supply and the output terminal of the DC magnetic latching relay. The output terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply and the live sleeve, so that the live sleeve, the output terminal of the magnetic latching relay, and the power supply form the main circuit. The jog switch is connected in series between the first output terminal of the power supply and the input terminal of the DC magnetic latching relay. The input terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply and the jog switch. The jog switch, the input terminal of the DC magnetic latching relay, and the power supply form a circuit and are connected in parallel with the main circuit.

[0005] This invention uses a DC magnetic latching relay to ensure circuit connection and disconnection. The relay is controlled by a jog switch and a control circuit board. When the plug is inserted into the switch, the circuit is open and no DC arc is generated. The relay connects the circuit only when the plug's copper contacts press down on the jog switch. When the plug is pulled out, the plug's copper contacts leave the jog switch, at which point the relay disconnects and the entire circuit is broken. Continuing to pull out the plug will not generate a DC arc, thus solving the problem that DC arcs are difficult to extinguish and can easily pose a safety hazard to operators. This improves the safety and reliability of the DC plug switch and reduces safety hazards.

[0006] The first output terminal of the power supply in this invention is the negative terminal, and the second output terminal of the power supply is the positive terminal.

[0007] Compared with the prior art, the present invention has the following significant advantages:

[0008] (1) This utility model realizes the closing and opening of the contact of the jog switch through the process of plug insertion and removal, thereby controlling the switching of the output contact of the magnetic latching relay, and finally realizing the connection and disconnection of the main circuit. It can avoid the generation of electric arc during the insertion and removal of the plug in the DC plug switch, solve the problem that DC arc is not easy to extinguish and can easily cause safety hazards to operators, improve the safety and stability of the DC plug switch, and reduce safety hazards.

[0009] (2) This utility model has a simple structure, low cost, and strong practicality, and is suitable for widespread promotion and use. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a three-dimensional structural diagram of the socket of this utility model;

[0012] Figure 2 This is one of the circuit diagrams of this utility model;

[0013] Figure 3 This is the second circuit diagram of this utility model;

[0014] Figure 4 This is the third circuit diagram of this utility model;

[0015] Figure 5 This is the fourth circuit diagram of this utility model;

[0016] Figure 6 This is the fifth circuit diagram of this utility model.

[0017] In the diagram: 1-Plug, 2-Socket, 3-Socket hole, 4-Electrified socket, 5-Jog switch, 6-Coil, 7-Contact, 8-Copper sheet, 9-Power supply. Detailed Implementation

[0018] like Figures 1-6As shown, this utility model discloses a DC plug-in switch with arc-extinguishing protection, including a plug 1 and a socket 2. The socket 2 has a socket 3 adapted to the plug 1. The socket 2 includes a live sleeve 4, a jog switch 5, and a DC magnetic latching relay. The live sleeve 4 is disposed on the moving contact of the jog switch 5 and is opposite to the copper piece 8 on one side of the plug 1, so that the copper piece 8 on that side of the plug 1 can be inserted into the live sleeve 4 through the socket 3. The live sleeve 4 is connected in series between the first output terminal of the power supply 9 and the output terminal (contact 7) of the DC magnetic latching relay. The output terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply 9 and the live sleeve 4, so that the live sleeve 4, the output terminal of the magnetic latching relay, and the power supply 9 form the main circuit. The jog switch 5 is connected in series between the first output terminal of the power supply and the input terminal (coil 6) of the DC magnetic latching relay. The input terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply 9 and the jog switch 5. The jog switch 5, the input terminal of the DC magnetic latching relay, and the power supply 9 form a circuit and are connected in parallel with the main circuit.

[0019] The jog switch is normally open before the plug is inserted into the energized socket. At this time, there is no input to the DC magnetic latching relay, the relay input coil is not energized, the relay output contacts are separated, and the main circuit is disconnected. After the plug is inserted into the energized socket, the jog switch is closed. At this time, there is input to the DC magnetic latching relay, the relay input coil is energized, and the relay output contacts are closed through electromagnetic induction, thus connecting the main circuit.

[0020] In this embodiment, the first output terminal of the power supply 9 is the negative terminal, and the second output terminal of the power supply 9 is the positive terminal.

[0021] The working principle of this utility model is as follows: the circuit is connected and disconnected by a DC magnetic latching relay. The relay is controlled by a jog switch to connect and disconnect. When the plug is inserted into the socket, the circuit is disconnected and no DC arc is generated. The relay connects the circuit only when the copper contacts of the plug are inserted into the live socket and the jog switch is pressed. When the plug is pulled out, the copper contacts of the plug leave the jog switch, at which point the relay is disconnected and the entire circuit is also disconnected. At this time, no DC arc is generated during the continued pulling out process.

[0022] The specific working process of this utility model is as follows:

[0023] See Figure 2 At this time, the plug is not inserted into the live socket under the socket hole, the contacts of the jog switch are in the normally open state, the input coil of the DC magnetic latching relay is not energized, and the main circuit is in the open state.

[0024] See Figure 3At this time, the plug is inserted into the live socket under the socket hole. During this process, the contacts of the jog switch are closed by the push of the copper piece of the plug, the input circuit of the DC magnetic latching relay is connected, and the relay coil is energized.

[0025] See Figure 4 At this time, the input circuit of the DC magnetic latching relay is connected, the relay coil is energized, and under the action of electromagnetic induction, the normally open contacts at the output of the relay are converted to the closed state, the main circuit of the circuit is connected, and the load is energized.

[0026] See Figure 5 At this point, the plug is pulled out of the live socket. During this process, the contacts of the jog switch separate under the action of the bottom spring, the input circuit of the DC magnetic latching relay is disconnected, and the relay coil is de-energized.

[0027] See Figure 6 At this time, the input circuit of the DC magnetic latching relay is disconnected, the relay coil is de-energized, the relay output contacts are separated by the bottom spring, the main circuit is disconnected, and the load is de-energized.

[0028] like Figure 2 and Figure 3 As shown, the main circuit is only connected and the load is energized when the plug's copper contacts press down the momentary switch. Therefore, the circuit is open and no DC arc is generated while the plug is inserted into the socket. Figure 5 and Figure 6 As shown, when the plug is pulled out, the copper contacts of the plug leave the jog switch, and the main circuit is disconnected. At this time, no DC arc will be generated during the continued pulling process.

[0029] The embodiments of this utility model are not limited thereto. Based on the above content of this utility model, and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, this utility model can also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of this utility model.

Claims

1. A DC plug-in switch with arc-extinguishing protection, comprising a plug and a socket, the socket having a socket adapted to the plug, characterized in that: The socket includes a live socket, a jog switch, and a DC magnetic latching relay. The live socket is located on the moving contact of the jog switch and faces the copper plate on one side of the plug, allowing the copper plate on that side of the plug to be inserted into the live socket through the socket hole. The live socket is connected in series between the first output terminal of the power supply and the output terminal of the DC magnetic latching relay. The output terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply and the live socket, so that the live socket, the output terminal of the magnetic latching relay, and the power supply form the main circuit. The jog switch is connected in series between the first output terminal of the power supply and the input terminal of the DC magnetic latching relay. The input terminal of the DC magnetic latching relay is connected in series between the second output terminal of the power supply and the jog switch. The jog switch, the input terminal of the DC magnetic latching relay, and the power supply form a circuit, which is connected in parallel with the main circuit.

2. The DC plug-in switch with arc-extinguishing protection according to claim 1, characterized in that: The first output terminal of the power supply is the negative terminal, and the second output terminal of the power supply is the positive terminal.

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