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CN-224217845-U - Spark-proof DC power socket

CN224217845UCN 224217845 UCN224217845 UCN 224217845UCN-224217845-U

Abstract

The embodiment of the utility model provides an anti-spark direct current power socket which comprises a socket shell and an anti-spark circuit. The socket shell is provided with an anode pin, a cathode pin and a switch control pin. The anti-spark circuit comprises a switch control circuit, an anode switch circuit, a first delay circuit, an anode output end and a cathode output end. The switch control circuit comprises a first MOS tube, wherein the control end of the first MOS tube is coupled with the switch control pin, the first end of the first MOS tube is coupled with the control end of the positive electrode switch circuit through the first delay circuit, and the second end of the first MOS tube is coupled with the negative electrode pin. The second end and the first end of the positive electrode switch circuit are respectively coupled with the positive electrode pin and the positive electrode output end. When the direct-current power plug is inserted in place, the negative electrode pin is separated from the switch control pin, the first MOS tube is conducted, and then the positive electrode switch circuit is conducted after a period of time.

Inventors

  • Qiu wanhe

Assignees

  • 苏州佳世达电通有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (10)

  1. 1. An anti-spark dc power socket for coupling to a dc power plug, comprising: a socket shell provided with a positive electrode pin, a negative electrode pin and a switch control pin, and The anti-spark circuit comprises a switch control circuit, an anode switch circuit, a first delay circuit, an anode output end and a cathode output end, wherein the switch control circuit comprises a first MOS tube, the control end of the first MOS tube is coupled with the switch control pin, the first end of the first MOS tube is coupled with the control end of the anode switch circuit through the first delay circuit, and the second end of the first MOS tube is coupled with the cathode pin; when the direct-current power plug is inserted in place, the negative electrode pin is separated from the switch control pin, the first end and the second end of the first MOS tube are conducted, and then the positive electrode switch circuit is conducted after a long time.
  2. 2. The anti-spark dc power socket of claim 1 wherein the positive switch circuit comprises a second MOS transistor, the control terminal of the positive switch circuit is the gate of the second MOS transistor, the first terminal of the positive switch circuit is one of the source and the drain of the second MOS transistor, and the second terminal of the positive switch circuit is the other of the source and the drain of the second MOS transistor.
  3. 3. The anti-spark DC power supply socket as set forth in claim 2, wherein, The first end of the first delay circuit is coupled with the positive electrode pin and the second end of the positive electrode switch circuit, the second end of the first delay circuit is coupled with the control end of the positive electrode switch circuit and the first end of the first MOS tube, and the first delay circuit comprises a first resistor and a first capacitor which are connected in parallel.
  4. 4. The anti-spark dc power socket of claim 1 wherein the negative pin is directly coupled to the negative output.
  5. 5. The anti-spark direct current power socket of claim 1, wherein the anti-spark circuit further comprises a second delay circuit and a negative electrode switch circuit, the negative electrode switch circuit comprises a third MOS tube, a control end of the third MOS tube is coupled with the switch control pin through the second delay circuit, a first end of the third MOS tube is coupled with the negative electrode pin, and a second end of the third MOS tube is coupled with the negative electrode output end; when the direct current power plug is inserted into the socket shell, the first end and the second end of the third MOS tube are conducted after a certain time.
  6. 6. The anti-spark dc power socket of claim 5 wherein the first end of the second delay circuit is coupled to the switch control pin and the control end of the third MOS transistor, the second end of the second delay circuit is coupled to the first end of the third MOS transistor and the negative pin, and the second delay circuit comprises a second resistor and a second capacitor connected in parallel.
  7. 7. The anti-spark DC power supply socket as set forth in claim 1, wherein, The socket shell comprises an accommodating space and an opening, wherein the negative electrode pin and the switch control pin are respectively arranged in the accommodating space, the switch control pin is arranged at a position of the accommodating space far away from the opening, and a first part of the negative electrode pin extends to a position adjacent to the opening; When the direct current power plug is inserted into place from the opening, the negative plug end of the direct current power plug pushes against the first part of the negative pin to elastically deform so as to drive the second part of the negative pin to be separated from the switch control pin.
  8. 8. The anti-spark dc power socket of claim 7 wherein the negative pin is a metal spring, a portion of the metal spring protruding toward the insertion location of the negative plug end to form a first portion of the negative pin.
  9. 9. The anti-spark dc power socket of claim 1 wherein the first MOS transistor is an NMOS transistor.
  10. 10. The anti-spark dc power socket of claim 1 wherein an overcurrent protection module is further connected in series between the positive pin and the positive output.

Description

Spark-proof DC power socket Technical Field The utility model relates to the field of power sockets, in particular to an anti-spark direct current power socket. Background In the current direct current power socket, the surface of the contact point is difficult to be completely smooth in the process of power connection, so that the local resistance on the contact point is increased. At this time, when current passes through these areas of increased resistance, a high current density may cause a severe oxidation-reduction reaction, which may cause tiny metal evaporation to form an electric spark. In the prior art, a socket with a switch is generally used, and after the socket is plugged, the switch of the socket and the switch of the electronic product are turned on accordingly, so that the occurrence of sparks is avoided. However, many users do not have awareness of operating according to the sequence in daily use, and potential safety hazards exist. Therefore, how to design a dc power socket, which can automatically prevent spark when the socket is plugged, has become a new research topic. Disclosure of utility model The embodiment of the utility model provides a direct-current power socket which can automatically prevent electric sparks from being generated when the socket is plugged. An embodiment of the present utility model provides an anti-spark dc power socket for coupling to a dc power plug, the anti-spark dc power socket comprising: a socket shell provided with a positive electrode pin, a negative electrode pin and a switch control pin, and The anti-spark circuit comprises a switch control circuit, an anode switch circuit, a first delay circuit, an anode output end and a cathode output end, wherein the switch control circuit comprises a first MOS tube, the control end of the first MOS tube is coupled with the switch control pin, the first end of the first MOS tube is coupled with the control end of the anode switch circuit through the first delay circuit, and the second end of the first MOS tube is coupled with the cathode pin; when the direct-current power plug is inserted in place, the negative electrode pin is separated from the switch control pin, the first end and the second end of the first MOS tube are conducted, and then the positive electrode switch circuit is conducted after a long time. Preferably, the positive electrode switch circuit comprises a second MOS transistor, the control end of the positive electrode switch circuit is the gate of the second MOS transistor, the first end of the positive electrode switch circuit is one of the source and the drain of the second MOS transistor, and the second end of the positive electrode switch circuit is the other one of the source and the drain of the second MOS transistor. Further preferably, the first end of the first delay circuit is coupled to the positive electrode pin and the second end of the positive electrode switch circuit, the second end of the first delay circuit is coupled to the control end of the positive electrode switch circuit and the first end of the first MOS transistor, and the first delay circuit includes a first resistor and a first capacitor connected in parallel. Preferably, the negative pin is directly coupled to the negative output. Preferably, the anti-spark circuit further comprises a second delay circuit and a negative electrode switch circuit, wherein the negative electrode switch circuit comprises a third MOS tube, the control end of the third MOS tube is coupled with the switch control pin through the second delay circuit, the first end of the third MOS tube is coupled with the negative electrode pin, and the second end of the third MOS tube is coupled with the negative electrode output end; when the direct current power plug is inserted into the socket shell, the first end and the second end of the third MOS tube are conducted after a certain time. Further preferably, the first end of the second delay circuit is coupled to the switch control pin and the control end of the third MOS transistor, the second end of the second delay circuit is coupled to the first end of the third MOS transistor and the negative electrode pin, and the second delay circuit includes a second resistor and a second capacitor connected in parallel. Preferably, the socket shell comprises an accommodating space and an opening, wherein the negative electrode pin and the switch control pin are respectively arranged in the accommodating space, the switch control pin is arranged at a position of the accommodating space far away from the opening, and a first part of the negative electrode pin extends to a position adjacent to the opening; When the direct current power plug is inserted into place from the opening, the negative plug end of the direct current power plug pushes against the first part of the negative pin to elastically deform so as to drive the second part of the negative pin to be separated from the switch control pin. Further pref