Circuit board of electric connection equipment and electric connection equipment

Abstract

The invention discloses a circuit board of electric connection equipment and the electric connection equipment. The electric connection equipment comprises a power line, a detection protection device and a shell, the electric detection protection device comprises an open circuit detection unit, an electric leakage detection unit, a driving module, a tripping module, a test module comprising a test switch, and a reset button. The circuit board comprises a first board surface and a second board surface; the tripping module is arranged in the middle area of the first plate surface; current-carrying conductors are arranged on two sides of the tripping module; the second board surface is provided with a first area located at the edge of the circuit board, the open circuit detection unit is arranged in the first area, and the first board surface is provided with a shielding conductor welding spot at a position corresponding to the first area; the test switch and the reset button are arranged in the middle area of the second board surface; and the electric leakage detection unit and the driving module are arranged in an area, adjacent to the test switch and the reset button, of the second board surface. Wiring can be simplified, the anti-interference capability is improved, and the size of the circuit board can be reduced as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and particularly to a circuit board of an electrical connection device and an electrical connection device. Background Art

[0002] A Leakage Circuit Detector Interrupter (LCDI) is a power connection device for electrical appliances, which can detect the leakage current of a power cord group through a leakage current detection line, and cut off the power connection of the electrical appliance when a certain leakage current is detected to ensure safe use. In recent years, in addition to detecting the leakage current of the power cord through the leakage current detection line, the leakage current detection circuit breaker also has higher safety detection requirements, such as detecting whether there is an open circuit in the leakage current detection line.

[0003] Currently, as the safety detection requirements of the detection and protection device of the power cord are getting higher and higher, the components of the circuit module included in the detection and protection device are also increasing. Therefore, the circuit board layout of the electrical connection device also faces more and more challenges, such as difficult circuit board routing, the electrical signals transmitted on the circuit board are easily interfered, and the required board surface size of the circuit board is relatively large. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a circuit board of an electrical connection device and an electrical connection device, which can not only simplify the routing, improve the anti-interference ability, but also minimize the circuit board size as much as possible.

[0005] In a first aspect, an embodiment of the present invention provides a circuit board of an electrical connection device. The electrical connection device includes a power cord, a detection and protection device disposed on the circuit board and connected to the power cord, and a housing wrapping the circuit board; a plug-in conductor for accessing power is disposed on the housing.

[0006] The power cord includes a first current-carrying line, a second current-carrying line, a first shielding conductor structure covering the first current-carrying line, and a second shielding conductor structure covering the second current-carrying line.

[0007] The detection and protection device includes an open-circuit detection unit, a leakage current detection unit, a driving module, a tripping module, a test module including a test switch, and a reset button.

[0008] The circuit board includes a first board surface facing the plug-in conductor and a second board surface away from the plug-in conductor.

[0009] The tripping module is disposed in the middle area of the first board surface; current-carrying conductors for contacting the plug-in conductor to obtain power are disposed on both sides of the tripping module.

[0010] The second board surface is provided with a first area located at the edge of the circuit board, the open - circuit detection unit is arranged in the first area, and the first board surface is provided with a shield conductor soldering point for soldering and connecting the first shield conductor structure and / or the second shield conductor structure at a position corresponding to the first area;

[0011] The test switch and the reset button are arranged in the middle area of the second board surface; the leakage detection unit and the driving module are arranged in the area of the second board surface adjacent to the test switch and the reset button.

[0012] The circuit board of the electrical connection device provided by the embodiment of the present invention has at least the following beneficial effects: By arranging the first area for connecting with the shield conductor structure of the power line at the edge of the circuit board, that is, the shield conductor soldering point is located at the edge of the circuit board, the soldering process between the first shield conductor structure and the second shield conductor structure and the circuit board is simpler, and it is also convenient for wire management; the open - circuit detection unit is located in the first area, so that the circuit trace between the shield conductor soldering point and the open - circuit detection unit is shorter, and it has strong anti - interference ability. Especially when there is a need to segment - detect the first shield conductor structure and the second shield conductor structure, there will be multiple connection points between the open - circuit detection unit and the first shield conductor structure and the second shield conductor structure. The shorter distance between the shield conductor soldering point and the open - circuit detection unit can make the circuit trace simpler; the open - circuit detection unit can output an open - circuit fault signal to the driving module after processing the open - circuit condition of the first shield conductor structure and the second shield conductor structure, without setting multiple long circuit traces connecting from the first area to the driving module; In the circuit layout of this embodiment, on the basis that the tripping module, the test switch and the reset button occupy the main positions of the circuit board, in the limited board surface space of the circuit board, the areas for arranging the open - circuit detection unit, the leakage detection unit and the driving module are reasonably allocated, which can not only simplify the wiring and improve the anti - interference ability, but also minimize the size of the circuit board as much as possible.

[0013] According to the circuit board provided by some embodiments of the present invention, the reset button, the test switch and the first area are arranged in sequence along the length - direction axis of the second board surface.

[0014] According to the circuit board provided by some embodiments of the present invention, the leakage detection unit is located in the left - hand area of the test switch, and the driving module is located in the left - hand area of the reset button and is adjacent to the leakage detection unit;

[0015] Or,

[0016] The leakage detection unit is located in the right - hand area of the test switch, and the driving module is located in the right - hand area of the reset button and is adjacent to the leakage detection unit.

[0017] In this embodiment, the leakage detection unit is close to the test switch, so that when the test switch of the test module is pressed, the transmission path of the leakage signal on the simulated first shielding conductor structure and the second shielding conductor structure is shorter, which is more convenient for wiring; the driving module is close to the leakage detection unit, and the path for the leakage fault signal output by the leakage detection unit to be transmitted to the driving module is shorter, which is more convenient for wiring.

[0018] According to the circuit board provided by some embodiments of the present invention, the current-carrying conductor extends along the length direction axis of the first board surface, and the end of the current-carrying conductor far from the shielding conductor solder joint is a power contact end for pressing against the insert conductor, and the end of the current-carrying conductor close to the shielding conductor solder joint is a power output solder joint for welding the first current-carrying line or the second current-carrying line.

[0019] According to the circuit board provided by some embodiments of the present invention, the first shielding conductor structure includes a first end close to the circuit board, a second end far from the first end, and a third end located between the first end and the second end; the second shielding conductor structure includes a fourth end close to the circuit board, a fifth end far from the fourth end, and a sixth end located between the fourth end and the fifth end; the third end is connected to the sixth end; four shielding conductor solder joints for connecting to the first end, the second end, the fourth end, and the fifth end respectively are provided in the first area.

[0020] According to the circuit board provided by some embodiments of the present invention, two shielding conductor solder joints for connecting to the third end and the sixth end respectively are further provided in the first area.

[0021] According to the circuit board provided by some embodiments of the present invention, the open-circuit detection unit includes a first switch unit and a second switch unit; the first switch unit includes a first triode and a first resistor for providing a conduction voltage to the first triode; the second switch unit includes a second triode and a fourth resistor for providing a conduction voltage to the second triode;

[0022] Wherein:

[0023] Two ends of the first resistor are respectively electrically connected to the shielding conductor solder joints corresponding to the first end and the fourth end, and two ends of the fourth resistor are respectively electrically connected to the shielding conductor solder joints corresponding to the second end and the fifth end;

[0024] Or,

[0025] Two ends of the first resistor are respectively electrically connected to the shielding conductor solder joints corresponding to the first end and the fifth end, and two ends of the fourth resistor are respectively electrically connected to the shielding conductor solder joints corresponding to the second end and the fourth end.

[0026] According to the circuit board provided by some embodiments of the present invention, the first switching unit further includes a second resistor and a third resistor. One end of the second resistor is connected to the second current-carrying line, and the other end of the second resistor is connected to one end of the first resistor and the emitter of the first triode. The other end of the first resistor is connected to the base of the first triode and one end of the third resistor, and the other end of the third resistor is connected to the first current-carrying line. The second switching unit further includes a fifth resistor and a sixth resistor. One end of the fifth resistor is connected to the second current-carrying line, and the other end of the fifth resistor is connected to one end of the fourth resistor and the emitter of the second triode. The other end of the fourth resistor is connected to the base of the second triode and one end of the sixth resistor, and the other end of the sixth resistor is connected to the first current-carrying line. The collectors of the first triode and the second triode are connected to the driving module. The first triode, the second triode, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are all arranged in the first region.

[0027] According to the circuit board provided by some embodiments of the present invention, the open-circuit detection unit includes a first switching unit and a second switching unit;

[0028] The first switching unit includes a first triode and a first voltage-dividing unit. The first voltage-dividing unit includes a second resistor, a first resistor, a seventeenth resistor, and a third resistor connected in series in sequence;

[0029] The second switching unit includes a second triode and a second voltage-dividing unit. The second voltage-dividing unit includes a fifth resistor, a fourth resistor, an eighteenth resistor, and a sixth resistor connected in series in sequence;

[0030] The connection point of the second resistor and the first resistor is connected to the shielding conductor solder joint corresponding to the first end and the emitter of the first triode. The connection point of the first resistor and the seventeenth resistor is connected to the base of the first triode. The connection point of the seventeenth resistor and the third resistor is connected to the shielding conductor solder joint corresponding to the fourth end. The connection point of the fifth resistor and the fourth resistor is connected to the shielding conductor solder joint corresponding to the second end and the emitter of the second triode. The connection point of the fourth resistor and the eighteenth resistor is connected to the base of the second triode. The connection point of the eighteenth resistor and the sixth resistor is connected to the shielding conductor solder joint corresponding to the fifth end. The second resistor and the fifth resistor are connected together and connected to the second current-carrying line, and the third resistor and the sixth resistor are connected together and connected to the first current-carrying line;

[0031] The collector of the first triode and the collector of the second triode are connected to the driving module; the first triode, the second triode, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventeenth resistor, and the eighteenth resistor are all arranged in the first area.

[0032] For the circuit board provided by some embodiments of the present invention, the leakage detection unit includes a fourteenth resistor, a fifteenth resistor, a third triode, and a third diode. One end of the fourteenth resistor is connected to the second current-carrying line, the other end of the fourteenth resistor is connected to one end of the fifteenth resistor and the base of the third triode, the emitter of the third triode is connected to the negative electrode of the third diode, the positive electrode of the third diode is connected to the shielding conductor solder joint corresponding to the sixth end, the other end of the fifteenth resistor is connected to the first current-carrying line, and the collector of the third triode is connected to the driving module;

[0033] The fourteenth resistor, the fifteenth resistor, the third triode, and the third diode are all arranged in the second area on the second board surface to the left of the test switch.

[0034] For the circuit board provided by some embodiments of the present invention, the leakage detection unit includes an eleventh resistor and a voltage stabilizing unit. The positive electrode of the voltage stabilizing unit is connected to the driving module, the negative electrode of the voltage stabilizing unit is connected to one end of the eleventh resistor, and the other end of the eleventh resistor is connected to the shielding conductor solder joint corresponding to the sixth end;

[0035] The eleventh resistor and the voltage stabilizing unit are both arranged in the second area on the second board surface to the left of the test switch.

[0036] For the circuit board provided by some embodiments of the present invention, the test module further includes an eighth resistor. One end of the test switch is connected to the connection point of the second resistor and the fifth resistor, the other end of the test switch is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the shielding conductor solder joint corresponding to the third end;

[0037] The eighth resistor is arranged in the middle area of the second board surface and is disposed adjacent to the test switch.

[0038] According to the circuit board provided by some embodiments of the present invention, the leakage detection unit includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, and a third triode. One end of the fourteenth resistor is connected to the second current-carrying line, the other end of the fourteenth resistor is connected to one end of the fifteenth resistor and the base of the third triode, the emitter of the third triode is connected to any one of the shield conductor solder joints, the other end of the fifteenth resistor is connected to the first current-carrying line, the collector of the third triode is connected to one end of the sixteenth resistor, and the other end of the sixteenth resistor is connected to the drive module; the fourteenth resistor, the fifteenth resistor, the sixteenth resistor, and the third triode are all arranged in the second area on the second board surface and to the left of the test switch.

[0039] According to the circuit board provided by some embodiments of the present invention, the leakage detection unit includes an eleventh resistor and a voltage stabilization unit. The positive electrode of the voltage stabilization unit is connected to the drive module, the negative electrode of the voltage stabilization unit is connected to one end of the eleventh resistor, and the other end of the eleventh resistor is connected to any one of the shield conductor solder joints; the eleventh resistor and the voltage stabilization unit are both arranged in the second area on the second board surface and to the left of the test switch.

[0040] According to the circuit board provided by some embodiments of the present invention, the drive module includes a thyristor, a seventh resistor, a tenth resistor, and a first capacitor. The detection and protection device further includes a tripping coil. The second current-carrying line is connected to one end of the tripping coil, the other end of the tripping coil is connected to the anode of the thyristor, the control electrode of the thyristor is connected to one end of the seventh resistor, one end of the tenth resistor, one end of the first capacitor, and the leakage detection unit, the other end of the tenth resistor is connected to the open-circuit detection unit, and the cathode of the thyristor, the other end of the first capacitor, and the other end of the seventh resistor are all connected to the first current-carrying line; the thyristor, the seventh resistor, the tenth resistor, and the first capacitor are all arranged in the third area on the second board surface and to the left of the reset button.

[0041] According to the circuit board provided by some embodiments of the present invention, the length dimension range of the circuit board is 56 mm ± 10 mm, and the width dimension range is 36 mm ± 10 mm; the length dimension range of the first area is 30 mm ± 3 mm, and the width dimension range is 8.5 mm ± 10 mm; the length dimension range of the arrangement area of the leakage detection unit on the second board surface is 10 mm ± 3 mm, and the width dimension range is 8 mm ± 3 mm; the length dimension range of the arrangement area of the drive module on the second board surface is 15 mm ± 3 mm, and the width dimension range is 10 mm ± 3 mm.

[0042] For the circuit board provided according to some embodiments of the present invention, the components in the open - circuit detection unit, leakage detection unit, the drive module, and the trip module are encapsulated by surface - mount packaging or through - hole packaging.

[0043] For the circuit board provided according to some embodiments of the present invention, the circuit board adopts the wiring method of single - sided board, double - sided board or multi - layer board.

[0044] For the circuit board provided according to some embodiments of the present invention, the circuit board is processed by wave soldering, reflow soldering or manual method.

[0045] In a second aspect, an electrical connection device provided by an embodiment of the present invention includes the circuit board as described in the first - aspect embodiment above, a power cord, a detection and protection device disposed on the circuit board and connected to the power cord, and a housing that wraps the circuit board; a blade conductor for accessing power is provided on the housing.

[0046] For the electrical connection device provided according to some embodiments of the present invention, a wire clip for clamping the power cord is provided at the connection between the housing and the power cord;

[0047] The first shielding conductor structure includes a first end close to the circuit board, a second end far from the first end, and a third end located between the first end and the second end; the second shielding conductor structure includes a fourth end close to the circuit board, a fifth end far from the fourth end, and a sixth end located between the fourth end and the fifth end;

[0048] The third end and the sixth end are electrically connected in one of the following three cases:

[0049] Case 1: Welded connection at the wire clip;

[0050] Case 2: Welded connection inside the housing;

[0051] Case 3: Lead to the shielding conductor solder joint to achieve electrical connection through the circuit board.

[0052] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures specifically pointed out in the specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0054] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0055] Figure 1 It is a schematic diagram of the overall structure of the electrical connection device provided by an embodiment of the present invention;

[0056] Figure 2 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 1 of the present invention;

[0057] Figure 3 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 2 of the present invention;

[0058] Figure 4 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 3 of the present invention;

[0059] Figure 5 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 4 of the present invention;

[0060] Figure 6 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 5 of the present invention;

[0061] Figure 7 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 6 of the present invention;

[0062] Figure 8 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 7 of the present invention;

[0063] Figure 9 It is a circuit schematic diagram of the detection and protection device for the power cord provided by Embodiment 8 of the present invention;

[0064] Figure 10 It is a layout schematic diagram of the first board surface of the circuit board of the electrical connection device provided by an embodiment of the present invention;

[0065] Figure 11 It is a layout schematic diagram of the second board surface of the circuit board of the electrical connection device provided by an embodiment of the present invention;

[0066] Figure 12 It is a layout schematic diagram of the first board surface of the circuit board of the electrical connection device provided by another embodiment of the present invention;

[0067] Figure 13 It is a layout schematic diagram of the second board surface of the circuit board of the electrical connection device provided by another embodiment of the present invention. Detailed implementation manners

[0068] This section will describe in detail specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings, and the function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0069] In the description of the embodiments of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, "greater than", "less than", "exceeding", etc. are understood not to include the present number, "above", "below", "within", etc. are understood to include the present number, "at least one" means one or more, and "at least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0070] It should be noted that words such as "set", "installed", "connected", etc. in the embodiments of the present invention should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connected" can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

[0071] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0072] A leakage circuit detector interrupter (LCDI) is a power connection device for electrical appliances, which can detect the leakage current of the power cord group through a leakage current detection wire and cut off the power connection of the electrical appliance when a certain leakage current is detected to ensure safe use. In recent years, in addition to detecting the leakage current of the power cord through the leakage current detection wire, the leakage circuit detector interrupter has also put forward higher safety detection requirements, such as detecting whether there is an open circuit in the leakage current detection wire. At present, as the safety detection requirements of the detection and protection device of the power cord are getting higher and higher, the components of the circuit module included in the detection and protection device are also increasing. Therefore, the circuit board layout of the electrical connection device also faces more and more challenges, such as difficult circuit board wiring, the electrical signals transmitted on the circuit board are easily interfered, and the required board surface size of the circuit board is relatively large.

[0073] Based on this, the embodiments of the present invention provide a circuit board layout of an electrical connection device, a circuit board, and an electrical connection device, which can not only simplify the wiring, improve the anti-interference ability, but also minimize the circuit board size as much as possible.

[0074] The following further elaborates on the embodiments of the present invention in conjunction with the accompanying drawings.

[0075] Figure 1 It is a schematic diagram of the overall structure of the electrical connection device provided by the embodiments of the present invention. The electrical connection device includes a power cord 100, a detection and protection device disposed on the circuit board and connected to the power cord 100, and a housing 400 that wraps the circuit board; a blade conductor 410 for accessing power is provided on the housing 400. Among them, since the circuit board is located inside the housing 400, it is not shown in Figure 1 it.

[0076] Figures 2 to 9 It is a circuit schematic diagram of the detection and protection device of the power cord 100 provided by some embodiments of the present invention. Specifically:

[0077] The power cord 100 includes a first current-carrying line 110, a second current-carrying line 120, a first shield conductor structure 130 covering the first current-carrying line 110, and a second shield conductor structure 140 covering the second current-carrying line 120. The first shield conductor structure 130 includes a first end a close to the circuit board, a second end b far from the first end a, and a third end c located between the first end a and the second end b. The second shield conductor structure 140 includes a fourth end d close to the circuit board, a fifth end e far from the fourth end d, and a sixth end f located between the fourth end d and the fifth end e. The third end c is connected to the sixth end f. It can be understood that the first shield conductor structure 130 covers the first current-carrying line 110 so as to collect the leakage signal of the first current-carrying line 110, and the second shield conductor structure 140 covers the second current-carrying line 120 so as to collect the leakage signal of the second current-carrying line 120. On this basis, by connecting the third end c in the middle of the first shield conductor structure 130 to the sixth end f in the second shield conductor structure 140, there is an associated point between the shield conductor structures of the first current-carrying line 110 and the second current-carrying line 120, and the two shield conductor structures are no longer independently separated. It enables the first shield conductor structure 130 and the second shield conductor structure 140 to construct multiple different detection paths for open-circuit detection. For example, the detection path from the first end a of the first shield conductor structure 130 to the third end c, then to the sixth end f of the second shield conductor structure 140, and finally to the fourth end d of the second shield conductor structure 140; the detection path from the first end a of the first shield conductor structure 130 to the third end c, then to the sixth end f of the second shield conductor structure 140, and finally to the fifth end e of the second shield conductor structure 140; the detection path from the second end b of the first shield conductor structure 130 to the third end c, then to the sixth end f of the second shield conductor structure 140, and finally to the fourth end d of the second shield conductor structure 140; the detection path from the second end b of the first shield conductor structure 130 to the third end c, then to the sixth end f of the second shield conductor structure 140, and finally to the fifth end e of the second shield conductor structure 140.

[0078] The detection and protection device includes an open-circuit detection unit 211, a leakage detection unit 212, a drive module 220, a trip module 230, a test module 250, an LED indication unit 260, and a lightning protection unit 270. Among them:

[0079] The open-circuit detection unit 211 includes a first switch unit 201 and a second switch unit 202. In Figures 2 to 7 the illustrated embodiment, the first switch unit 201 includes a first triode Q1, a first resistor R1, a second resistor R2, and a third resistor R3, and the second switch unit 202 includes a second triode Q2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. In Figures 8 to 9In the illustrated embodiment, the first switch unit 201 includes a first triode Q1 and a first voltage dividing unit. The first voltage dividing unit includes a first resistor R1, a second resistor R2, a third resistor R3, and a seventeenth resistor R17; the second switch unit 202 includes a second triode Q2 and a second voltage dividing unit. The second voltage dividing unit includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and an eighteenth resistor R18;

[0080] The leakage detection unit 212 is at Figures 2 to 4 and Figure 8 In the illustrated embodiment, it includes a voltage stabilizing unit ZD1 and an eleventh resistor R11; the leakage detection unit 212 is at Figures 5 to 7 In the illustrated embodiment, it includes a third triode Q3, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a third diode D3; the leakage detection unit 212 is at Figure 9 In the illustrated embodiment, it includes a third triode Q3, a fourteenth resistor R14, a fifteenth resistor R15, and a third diode D3;

[0081] The drive module 220 includes a thyristor Q4, a seventh resistor R7, a tenth resistor R10, and a first capacitor C1;

[0082] The test module 250 is at Figure 2 and Figure 5 In the illustrated embodiment, it includes a test switch TEST1; the test module 250 is at Figure 3 , Figure 6 , Figure 8 and Figure 9 In the illustrated embodiment, it includes a test switch TEST1 and an eighth resistor R8; the test module 250 is at Figure 4 and Figure 7 In the illustrated embodiment, it includes a test switch TEST1, an eighth resistor R8, and a ninth resistor R9;

[0083] The LED indication unit 260 includes a twelfth resistor R12, a thirteenth resistor R13, and a light emitting diode LED1;

[0084] The lightning protection unit 270 includes a first varistor ZR1;

[0085] The detection and protection device further includes a trip coil Lx, a first diode D1, a second diode D2, and a second varistor ZR2.

[0086] Specifically, in Figures 2 to 7 the illustrated embodiment, the connection relationships of the respective circuit components are specifically as follows:

[0087] The second current-carrying line 120 is connected to one end of the trip coil Lx and one end of the first varistor ZR1. The other end of the first varistor ZR1 is connected to the first current-carrying line 110. The other end of the trip coil Lx is connected to one end of the thirteenth resistor R13, the cathode of the second diode D2, one end of the second varistor ZR2, the anode of the thyristor Q4, one end of the second resistor R2, one end of the fifth resistor R5, and one end of the test switch TEST1. The other end of the thirteenth resistor R13 is connected to one end of the twelfth resistor R12. The other end of the twelfth resistor R12 is connected to the positive electrode of the light-emitting diode LED1. The other end of the second resistor R2 is connected to one end of the first resistor R1 and the emitter of the first triode Q1. The other end of the first resistor R1 is connected to one end of the third resistor R3 and the base of the first triode Q1. The other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the emitter of the second triode Q2. The other end of the fourth resistor R4 is connected to one end of the sixth resistor R6 and the base of the second triode Q2. The collectors of the first triode Q1 and the second triode Q2 are connected together and then connected to one end of the tenth resistor R10. The other end of the tenth resistor R10 is connected to one end of the seventh resistor R7, one end of the first capacitor C1, and the control electrode of the thyristor Q4. The other end of the sixth resistor R6, the other end of the third resistor R3, the other end of the seventh resistor R7, the other end of the first capacitor C1, the cathode of the thyristor Q4, the other end of the second varistor ZR2, the anode of the second diode D2, and the negative electrode of the light-emitting diode LED1 are all connected to the positive electrode of the first diode D1. The negative electrode of the first diode D1 is connected to the first current-carrying line 110.

[0088] For the first resistor R1, in the Figure 2 and Figure 5 embodiments, one end of the first resistor R1 is further connected to the first terminal a, and the other end of the first resistor R1 is further connected to the fourth terminal d; in the Figure 4 and Figure 7 embodiments, one end of the first resistor R1 is further connected to the first terminal a, and the other end of the first resistor R1 is further connected to the fifth terminal e.

[0089] For the fourth resistor R4, in the Figure 2 and Figure 5 embodiments, one end of the fourth resistor R4 is further connected to the second terminal b, and the other end of the fourth resistor R4 is further connected to the fifth terminal e; in the Figure 4 and Figure 7 embodiments, one end of the fourth resistor R4 is further connected to the second terminal b, and the other end of the fourth resistor R4 is further connected to the fourth terminal d.

[0090] For the leakage detection unit 212, in the Figure 2 and Figure 4In the illustrated embodiment, the positive electrode of the voltage regulator unit ZD1 is connected to the control electrode of the thyristor Q4, the negative electrode of the voltage regulator unit ZD1 is connected to one end of the eleventh resistor R11, and the other end of the eleventh resistor R11 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f; in Figure 5 and Figure 7 In the illustrated embodiment, the base of the third triode Q3 is connected to one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15. The other end of the fourteenth resistor R14 is connected to the connection point of the trip coil Lx and the anode of the thyristor Q4, and the other end of the fifteenth resistor R15 is connected to the connection point of the cathode of the thyristor Q4 and the positive electrode of the first diode D1. The collector of the third triode Q3 is connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to the control electrode of the thyristor Q4; the emitter of the third triode Q3 is connected to the cathode of the third diode D3, and the anode of the third diode D3 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f.

[0091] For the test module 250, in Figure 2 and Figure 5 In the illustrated embodiment, the other end of the test switch TEST1 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f; in Figure 3 and Figure 6 In the illustrated embodiment, the other end of the test switch TEST1 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f; in Figure 4 and Figure 7 In the illustrated embodiment, the other end of the test switch TEST1 is connected to one end of the eighth resistor R8 and one end of the ninth resistor R9, and the other ends of the eighth resistor R8 and the ninth resistor R9 are connected to any two of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f.

[0092] In addition, in Figure 8 and Figure 9 In the illustrated embodiment, the connection relationships of the respective circuit components are specifically as follows:

[0093] The second current-carrying line 120 is connected to one end of the trip coil Lx and one end of the first varistor ZR1. The other end of the first varistor ZR1 is connected to the first current-carrying line 110. The other end of the trip coil Lx is connected to one end of the thirteenth resistor R13, the cathode of the second diode D2, one end of the second varistor ZR2, the anode of the thyristor Q4, one end of the second resistor R2, one end of the fifth resistor R5, and one end of the test switch TEST1; the other end of the thirteenth resistor R13 is connected to one end of the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected to the positive electrode of the light-emitting diode LED1; the other end of the second resistor R2 is connected to one end of the first resistor R1, the emitter of the first triode Q1, and the first terminal a; the other end of the first resistor R1 is connected to one end of the seventeenth resistor R17 and the base of the first triode Q1, and the other end of the seventeenth resistor R17 is connected to the fourth terminal d; the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4, the emitter of the second triode Q2, and the second terminal b; the other end of the fourth resistor R4 is connected to one end of the eighteenth resistor R18 and the base of the second triode Q2, and the other end of the eighteenth resistor R18 is connected to the fifth terminal e; the collectors of the first triode Q1 and the second triode Q2 are connected together and then connected to one end of the tenth resistor R10 and one end of the seventh resistor R7; the other end of the tenth resistor R10 is connected to one end of the first capacitor C1 and the control electrode of the thyristor Q4; the other ends of the sixth resistor R6, the third resistor R3, the seventh resistor R7, the other end of the first capacitor C1, the cathode of the thyristor Q4, the other end of the second varistor ZR2, the anode of the second diode D2, and the negative electrode of the light-emitting diode LED1 are all connected to the positive electrode of the first diode D1, and the negative electrode of the first diode D1 is connected to the first current-carrying line 110.

[0094] For the leakage detection unit 212, in Figure 8 the embodiment shown, the positive electrode of the voltage regulator unit ZD1 is connected to the connection point of the tenth resistor R10 and the collectors of the first triode Q1 and the second triode Q2. The negative electrode of the voltage regulator unit ZD1 is connected to one end of the eleventh resistor R11, and the other end of the eleventh resistor R11 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f, and preferably, the other end of the eleventh resistor R11 is connected to the sixth terminal f; in Figure 9In the illustrated embodiment, the base of the third triode Q3 is connected to one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15. The other end of the fourteenth resistor R14 is connected to the connection point between the trip coil Lx and the anode of the thyristor Q4. The other end of the fifteenth resistor R15 is connected to the connection point between the cathode of the thyristor Q4 and the anode of the first diode D1. The collector of the third triode Q3 is connected to the connection point between the tenth resistor R10, the collector of the first triode Q1, and the collector of the second triode Q2. The emitter of the third triode Q3 is connected to the cathode of the third diode D3, and the anode of the third diode D3 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f, where the anode of the third diode D3 is preferably connected to the sixth terminal f.

[0095] For the test module 250, in Figure 8 and Figure 9 In the illustrated embodiment, the other end of the test switch TEST1 is connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 is connected to any one of the first terminal a, the second terminal b, the third terminal c, the fourth terminal d, the fifth terminal e, and the sixth terminal f, where the other end of the eighth resistor R8 is preferably connected to the third terminal c.

[0096] Next, taking Figure 5 the illustrated embodiment as an example, the operation of the above detection and protection device under various leakage and open - circuit conditions will be introduced:

[0097] 1. When the leakage signal of the first current - carrying line 110 is transmitted to the first shielding conductor structure 130:

[0098] After the first shielding conductor structure 130 obtains the leakage signal, the third triode Q3 conducts, forming a conduction path: the first current - carrying line 110 - the first shielding conductor structure 130 - the third diode D3 - the third triode Q3 - the sixteenth resistor R16 - the seventh resistor R7 - the second diode D2 - the trip coil Lx - the second current - carrying line 120;

[0099] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half - cycle of the AC power supply, that is, the level of the second current - carrying line 120 is greater than the level of the first current - carrying line 110, the thyristor Q4 conducts, forming a strong - current path: the second current - carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current - carrying line 110;

[0100] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0101] 2. When the leakage signal of the second current - carrying line 120 is transmitted to the second shielding conductor structure 140:

[0102] After the second shielding conductor structure 140 obtains the leakage signal, the third triode Q3 conducts, forming a conduction path of the second current-carrying line 120 - the second shielding conductor structure 140 - the third diode D3 - the third triode Q3 - the sixteenth resistor R16 - the seventh resistor R7 - the first diode D1 - the first current-carrying line 110;

[0103] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current-carrying line 110;

[0104] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0105] 3. When the part of the first shielding conductor structure 130 between the first end a and the third end c is open:

[0106] The short-circuit path between the first end a and the fourth end d is disconnected, and the two ends of the first resistor R1 are no longer short-circuited; the two ends of the fourth resistor R4 are still short-circuited, and the fourth resistor R4 is short-circuited by the conduction path of the second end b - the third end c - the sixth end f - the fifth end e; it should be noted that the conduction path of the second end b - the third end c - the sixth end f - the fourth end d also exists;

[0107] A conduction path of the second current-carrying line 120 - the trip coil Lx - the second resistor R2 - the first resistor R1 - the third resistor R3 - the first diode D1 - the first current-carrying line 110 is formed;

[0108] The first triode Q1 is made to conduct, while the second triode Q2 remains cut off; a conduction path of the second current-carrying line 120 - the trip coil Lx - the second resistor R2 - the first triode Q1 - the tenth resistor R10 - the seventh resistor R7 - the first diode D1 - the first current-carrying line 110 is formed;

[0109] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current-carrying line 110;

[0110] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0111] 4. When the part of the first shielding conductor structure 130 between the second end b and the third end c is open:

[0112] The short - circuit path between the second terminal b and the fifth terminal e is disconnected, and the two ends of the fourth resistor R4 are no longer short - circuited; the two ends of the first resistor R1 are still short - circuited, and the first resistor R1 is short - circuited by the conduction path from the first terminal a - the third terminal c - the sixth terminal f - the fourth terminal d; it should be noted that the conduction path from the first terminal a - the third terminal c - the sixth terminal f - the fifth terminal e exists simultaneously;

[0113] A conduction path of the second current - carrying line 120 - the tripping coil Lx - the fifth resistor R5 - the fourth resistor R4 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0114] The second triode Q2 is turned on, and the first triode Q1 remains cut - off; a conduction path of the second current - carrying line 120 - the tripping coil Lx - the fifth resistor R5 - the second triode Q2 - the tenth resistor R10 - the seventh resistor R7 - the first diode D1 - the first current - carrying line 110 is formed;

[0115] The voltage of the control electrode of the thyristor Q4 increases. When it comes to the negative half - cycle of the AC power supply, that is, the level of the second current - carrying line 120 is greater than the level of the first current - carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current - carrying line 120 - the tripping coil Lx - the thyristor Q4 - the first diode D1 - the first current - carrying line 110 is formed;

[0116] The tripping coil Lx generates a strong electromagnetic force, thereby driving the tripping module 230 to disconnect the power connection between the input end and the output end of the power line.

[0117] 5. When the connecting conductor between the third terminal c and the sixth terminal f is open - circuited:

[0118] The short - circuit path between the first terminal a and the fourth terminal d is disconnected, and the two ends of the first resistor R1 are no longer short - circuited; the short - circuit path between the second terminal b and the fifth terminal e is disconnected, and the two ends of the fourth resistor R4 are no longer short - circuited;

[0119] A conduction path of the second current - carrying line 120 - the tripping coil Lx - the second resistor R2 - the first resistor R1 - the third resistor R3 - the first diode D1 - the first current - carrying line 110 is formed, and a conduction path of the second current - carrying line 120 - the tripping coil Lx - the fifth resistor R5 - the fourth resistor R4 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0120] Cause the first triode Q1 and the second triode Q2 to conduct; form a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first triode Q1 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110, and form a conduction path of the second current-carrying line 120 - trip coil Lx - fifth resistor R5 - second triode Q2 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0121] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0122] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0123] 6. When the part of the second shielding conductor structure 140 between the fourth end d and the sixth end f is open:

[0124] The short-circuit path between the first end a and the fourth end d is disconnected, and the two ends of the first resistor R1 are no longer short-circuited; the two ends of the fourth resistor R4 are still short-circuited, and the fourth resistor R4 is short-circuited by the conduction path of the second end b - third end c - sixth end f - fifth end e; it should be noted that the conduction path of the first end a - third end c - sixth end f - fifth end e exists simultaneously;

[0125] Form a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first resistor R1 - third resistor R3 - first diode D1 - first current-carrying line 110;

[0126] Cause the first triode Q1 to conduct, while the second triode Q2 remains cut off; form a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first triode Q1 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0127] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0128] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0129] 7. When a part of the second shielding conductor structure 140 between the fifth terminal e and the sixth terminal f is open:

[0130] The short - circuit path between the second terminal b and the fifth terminal e is disconnected, and the two ends of the fourth resistor R4 are no longer short - circuited; the two ends of the first resistor R1 are still short - circuited, and the conduction path from the first terminal a - the third terminal c - the sixth terminal f - the fourth terminal d shorts the first resistor R1; it should be noted that the conduction path of the second terminal b - the third terminal c - the sixth terminal f - the fourth terminal d also exists;

[0131] A conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the fourth resistor R4 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0132] The second triode Q2 is turned on, and the first triode Q1 remains cut - off; a conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the second triode Q2 - the tenth resistor R10 - the seventh resistor R7 - the first diode D1 - the first current - carrying line 110 is formed;

[0133] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half - cycle of the AC power supply, that is, the level of the second current - carrying line 120 is greater than the level of the first current - carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current - carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current - carrying line 110 is formed;

[0134] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0135] 8. When the test switch TEST1 is pressed:

[0136] The test switch TEST1 simulates the leakage signal of the second current - carrying line 120 and transmits it to the first shielding conductor structure 130 or the second shielding conductor structure 140:

[0137] After the first shielding conductor structure 130 or the second shielding conductor structure 140 obtains this leakage signal, the third triode Q3 is turned on, and a conduction path of the second current - carrying line 120 - the trip coil Lx - the test switch TEST1 - the first shielding conductor structure 130 / the second shielding conductor structure 140 - the third diode D3 - the third triode Q3 - the sixteenth resistor R16 - the seventh resistor R7 - the first diode D1 - the first current - carrying line 110 is formed;

[0138] The voltage of the control electrode of thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, when the level of the second current-carrying line 120 is greater than that of the first current-carrying line 110, thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0139] The trip coil Lx generates a strong electromagnetic force, thereby driving the trip module 230 to disconnect the power connection between the input end and the output end of the power line.

[0140] In addition, take Figure 8 the illustrated embodiment to introduce the operation of the detection and protection device provided by the embodiments of the present invention under various leakage and open-circuit conditions:

[0141] 1. When the leakage signal of the first current-carrying line 110 is transmitted to the first shielding conductor structure 130:

[0142] After the first shielding conductor structure 130 obtains the leakage signal, it is transmitted to the sixth terminal f, causing the voltage regulator unit ZD1 to be broken down, forming a conduction path of the first current-carrying line 110 - first shielding conductor structure 130 - eleventh resistor R11 - voltage regulator unit ZD1 - seventh resistor R7 - second diode D2 - trip coil Lx - second current-carrying line 120;

[0143] The voltage of the control electrode of thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, when the level of the second current-carrying line 120 is greater than that of the first current-carrying line 110, thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0144] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0145] 2. When the leakage signal of the second current-carrying line 120 is transmitted to the second shielding conductor structure 140:

[0146] After the second shielding conductor structure 140 obtains the leakage signal, it is transmitted to the sixth terminal f, causing the voltage regulator unit ZD1 to be broken down, forming a conduction path of the second current-carrying line 120 - second shielding conductor structure 140 - eleventh resistor R11 - voltage regulator unit ZD1 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0147] The voltage of the control electrode of thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, when the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0148] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0149] 3. When a part of the first shield conductor structure 130 between the first end a and the third end c is open:

[0150] The short-circuit path between the first end a and the fourth end d is disconnected, and the two ends of the first bias unit composed of the first resistor R1 and the seventeenth resistor R17 are no longer short-circuited; the two ends of the second bias unit composed of the fourth resistor R4 and the eighteenth resistor R18 are still short-circuited, and the conduction path of the second end b - third end c - sixth end f - fifth end e short-circuits the second bias unit; it should be noted that the conduction path of the second end b - third end c - sixth end f - fourth end d also exists at the same time;

[0151] A conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first resistor R1 - seventeenth resistor R17 - third resistor R3 - first diode D1 - first current-carrying line 110 is formed;

[0152] This makes the first triode Q1 conduct, while the second triode Q2 remains cut off; a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first triode Q1 - seventh resistor R7 - first diode D1 - first current-carrying line 110 is formed;

[0153] The voltage of the control electrode of thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, when the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0154] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0155] 4. When a part of the first shield conductor structure 130 between the second end b and the third end c is open:

[0156] The short - circuit path between the second terminal b and the fifth terminal e is disconnected, and the two ends of the second bias unit composed of the fourth resistor R4 and the eighteenth resistor R18 are no longer short - circuited; the two ends of the first bias unit composed of the first resistor R1 and the seventeenth resistor R17 are still short - circuited, and the conduction path of the first terminal a - the third terminal c - the sixth terminal f - the fourth terminal d short - circuits the first bias unit; it should be noted that the conduction path of the first terminal a - the third terminal c - the sixth terminal f - the fifth terminal e exists simultaneously;

[0157] A conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the fourth resistor R4 - the eighteenth resistor R18 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0158] The second triode Q2 is turned on, and the first triode Q1 remains cut - off; a conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the second triode Q2 - the seventh resistor R7 - the first diode D1 - the first current - carrying line 110 is formed;

[0159] The voltage at the control electrode of the thyristor Q4 increases. When it reaches the negative half - cycle of the AC power supply, that is, when the level of the second current - carrying line 120 is greater than the level of the first current - carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current - carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current - carrying line 110 is formed;

[0160] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0161] 5. When the connecting conductor between the third terminal c and the sixth terminal f is open - circuited:

[0162] The short - circuit path between the first terminal a and the fourth terminal d is disconnected, and the two ends of the first bias unit composed of the first resistor R1 and the seventeenth resistor R17 are no longer short - circuited; the short - circuit path between the second terminal b and the fifth terminal e is disconnected, and the two ends of the second bias unit composed of the fourth resistor R4 and the eighteenth resistor R18 are no longer short - circuited;

[0163] A conduction path of the second current - carrying line 120 - the trip coil Lx - the second resistor R2 - the first resistor R1 - the seventeenth resistor R17 - the third resistor R3 - the first diode D1 - the first current - carrying line 110 is formed, and a conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the fourth resistor R4 - the eighteenth resistor R18 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0164] The first triode Q1 and the second triode Q2 are both turned on; a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first triode Q1 - seventh resistor R7 - first diode D1 - first current-carrying line 110 is formed, and a conduction path of the second current-carrying line 120 - trip coil Lx - fifth resistor R5 - second triode Q2 - seventh resistor R7 - first diode D1 - first current-carrying line 110 is formed;

[0165] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110 is formed;

[0166] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0167] 6. When a part of the second shielding conductor structure 140 between the fourth end d and the sixth end f is open:

[0168] The short-circuit path between the first end a and the fourth end d is disconnected, and the two ends of the first bias unit composed of the first resistor R1 and the seventeenth resistor R17 in series are no longer short-circuited; the two ends of the second bias unit composed of the fourth resistor R4 and the eighteenth resistor R18 in series are still short-circuited, and the conduction path of the second end b - third end c - sixth end f - fifth end e shorts the second bias unit; it should be noted that the conduction path of the first end a - third end c - sixth end f - fifth end e exists simultaneously;

[0169] A conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first resistor R1 - seventeenth resistor R17 - third resistor R3 - first diode D1 - first current-carrying line 110 is formed;

[0170] The first triode Q1 is turned on, and the second triode Q2 remains cut off; a conduction path of the second current-carrying line 120 - trip coil Lx - second resistor R2 - first triode Q1 - seventh resistor R7 - first diode D1 - first current-carrying line 110 is formed;

[0171] The voltage of the control electrode of the thyristor Q4 increases. When it reaches the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110 is formed;

[0172] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0173] 7. When the part of the second shielding conductor structure 140 between the fifth end e and the sixth end f is open:

[0174] The short - circuit path between the second end b and the fifth end e is disconnected, and the two ends of the second bias unit composed of the fourth resistor R4 and the eighteenth resistor R18 in series are no longer short - circuited; the two ends of the first bias unit composed of the first resistor R1 and the seventeenth resistor R17 in series are still short - circuited, and the conduction path from the first end a - the third end c - the sixth end f - the fourth end d shorts the first bias unit; it should be noted that the conduction path of the second end b - the third end c - the sixth end f - the fourth end d also exists simultaneously;

[0175] A conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the fourth resistor R4 - the eighteenth resistor R18 - the sixth resistor R6 - the first diode D1 - the first current - carrying line 110 is formed;

[0176] The second triode Q2 is turned on, and the first triode Q1 remains cut - off; a conduction path of the second current - carrying line 120 - the trip coil Lx - the fifth resistor R5 - the second triode Q2 - the seventh resistor R7 - the first diode D1 - the first current - carrying line 110 is formed;

[0177] The voltage of the control electrode of the thyristor Q4 increases. When it comes to the negative half - cycle of the AC power supply, that is, the level of the second current - carrying line 120 is greater than the level of the first current - carrying line 110, the thyristor Q4 is turned on, and a strong current path of the second current - carrying line 120 - the trip coil Lx - the thyristor Q4 - the first diode D1 - the first current - carrying line 110 is formed;

[0178] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the power connection between the input end and the output end of the power line.

[0179] 8. When the open - circuit detection unit 211 is working normally and there is no open - circuit situation in the first shielding conductor structure 130 and the second shielding conductor structure 140:

[0180] The potentials on the first shielding conductor structure 130 and the second shielding conductor structure 140 are determined by the series voltage division of the first equivalent resistance after the parallel connection of the second resistor R2 and the fifth resistor R5 and the second equivalent resistance after the parallel connection of the third resistor R3 and the sixth resistor R6, and are at a level that will not cause the voltage - stabilizing unit ZD1 to be broken down;

[0181] At this time, if the test switch TEST1 is pressed, it is equivalent to connecting the eighth resistor R8 in parallel with the second resistor R2 and the fifth resistor R5, which makes the first equivalent resistance smaller, resulting in an increase in the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140, causing the voltage stabilizing unit ZD1 to be broken down, forming a conduction path of the second current-carrying line 120 - trip coil Lx - test switch TEST1 - eighth resistor R8 - first shielding conductor structure 130 / second shielding conductor structure 140 - eleventh resistor R11 - voltage stabilizing unit ZD1 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0182] The voltage of the control electrode of the thyristor Q4 increases. When it comes to the negative half-cycle of the AC power supply, that is, the level of the second current-carrying line 120 is greater than the level of the first current-carrying line 110, the thyristor Q4 conducts, forming a strong current path of the second current-carrying line 120 - trip coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110;

[0183] The trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 230 to disconnect the electrical connection between the input end and the output end of the power line.

[0184] 9. When the open-circuit detection unit 211 fails, such as a single device being open-circuited or short-circuited, it will cause the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 to change, resulting in two situations. One is that the increase in the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 directly causes the voltage stabilizing unit ZD1 to be broken down, leading to tripping; the other is that the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 decrease, resulting in no tripping when the user actively presses the test switch TEST1 for testing.

[0185] The following lists various single-device faults that the open-circuit detection unit 211 may have:

[0186] 9.1. When the second resistor R2 in the open-circuit detection unit 211 has an open-circuit fault, it makes the first equivalent resistance larger, resulting in a decrease in the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140, and the voltage stabilizing unit ZD1 remains in a non-broken-down state;

[0187] It should be noted that in this case, the open - circuit detection unit 211 cannot trigger a trip in response to a partial open - circuit situation of the portion of the first shield conductor structure 130 between the first end a and the third end c, but can still trigger a trip in response to four open - circuit situations, namely, a partial open - circuit of the first shield conductor structure 130 between the second end b and the third end c, an open - circuit of the connecting conductor between the third end c and the sixth end f, a partial open - circuit of the second shield conductor structure 140 between the fourth end d and the sixth end f, and a partial open - circuit of the second shield conductor structure 140 between the fifth end e and the sixth end f;

[0188] It can be seen that in this case, if a partial open - circuit situation of the first shield conductor structure 130 between the first end a and the third end c occurs, the user cannot detect it, and there will be a potential safety hazard.

[0189] 9.2. When the fifth resistor R5 in the open - circuit detection unit 211 has an open - circuit fault, it is similar to the situation where the second resistor R2 has an open - circuit fault in 9.1.

[0190] 9.3. When the third resistor R3 in the open - circuit detection unit 211 has an open - circuit fault, the second equivalent resistance becomes smaller, resulting in an increase in the potential of the first shield conductor structure 130 and the second shield conductor structure 140, which will cause the voltage - stabilizing unit ZD1 to be broken down and trigger a trip.

[0191] 9.4. When the sixth resistor R6 in the open - circuit detection unit 211 has an open - circuit fault, it is similar to the situation where the third resistor R3 has an open - circuit fault in 9.3.

[0192] 9.5. When the first triode Q1 in the open - circuit detection unit 211 has an open - circuit fault, the open - circuit detection unit 211 cannot trigger a trip in response to a partial open - circuit situation of the portion of the first shield conductor structure 130 between the first end a and the third end c;

[0193] It can be seen that in this case, if a partial open - circuit situation of the first shield conductor structure 130 between the first end a and the third end c occurs, the user cannot detect it, and there will be a potential safety hazard.

[0194] 9.6. When the second triode Q2, the seventeenth resistor R17, and the eighteenth resistor R18 in the open - circuit detection unit 211 have open - circuit faults, it is similar to the situation where the first triode Q1 has an open - circuit fault in 9.5.

[0195] 9.7. When the second resistor R2 in the open - circuit detection unit 211 has a short - circuit fault, the first equivalent resistance becomes zero, resulting in an increase in the potential of the first shield conductor structure 130 and the second shield conductor structure 140, which will cause the voltage - stabilizing unit ZD1 to be broken down and trigger a trip.

[0196] 9.8. When the fifth resistor R5 in the open - circuit detection unit 211 has a short - circuit fault, it is similar to the situation where the second resistor R2 has a short - circuit fault in 9.7.

[0197] 9.9. When the third resistor R3 in the open - circuit detection unit 211 has a short - circuit fault, the second equivalent resistance becomes zero, causing the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 to drop, and the voltage - stabilizing unit ZD1 remains in a non - breakdown state.

[0198] 9.10. When the sixth resistor R6 in the open - circuit detection unit 211 has a short - circuit fault, it is similar to the situation where the third resistor R3 has a short - circuit fault in 9.9.

[0199] 9.11. When the first triode Q1 in the open - circuit detection unit 211 has a short - circuit fault, the voltage at the control electrode of the thyristor Q4 will increase and trigger tripping.

[0200] 9.12. When the second triode Q2 in the open - circuit detection unit 211 has a short - circuit fault, it is similar to the situation where the first triode Q1 has a short - circuit fault in 9.11.

[0201] For the single - device fault situations of the open - circuit detection unit 211 in the above 9.3, 9.4, 9.7, 9.8, 9.11, and 9.12, etc., it will directly cause tripping, making the user stop using this power cord.

[0202] For the single - device fault situations of the open - circuit detection unit 211 in the above 9.1, 9.2, 9.5, 9.6, 9.9, and 9.10, etc., tripping will not be triggered, and the user cannot detect it, which will pose a safety hazard. On this basis, if the user actively presses the test switch TEST1 for testing, the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 have been changed. After pressing the test switch TEST1, the potentials of the first shielding conductor structure 130 and the second shielding conductor structure 140 are still not high enough to cause the voltage - stabilizing unit ZD1 to break down and trigger tripping, enabling the user to visually see that no tripping occurs after pressing the test switch TEST1, so as to determine that the detection and protection device is abnormal and cannot play the role of leakage protection or open - circuit protection of the shielding structure, and then stop using this faulty product, further enhancing the safety guarantee.

[0203] Figure 10 It is a layout schematic diagram of the first board surface of the circuit board of the electrical connection device provided by an embodiment of the present invention; Figure 11 It corresponds to Figure 10 The layout schematic diagram of the second board surface of the circuit board of the electrical connection device provided by the shown embodiment of the present invention. Additionally, Figure 12It is a layout schematic diagram of the first board surface of the circuit board of the electrical connection device provided by another embodiment of the present invention; Figure 13 Then it is corresponding to the present invention Figure 12 It is a layout schematic diagram of the second board surface of the circuit board of the electrical connection device provided by the embodiment shown.

[0204] Referring to Figures 10 to 13 , in a circuit board of an electrical connection device provided by an embodiment of the present invention, the circuit board located inside the housing 400 includes a first board surface 301 facing the insert conductor 410 and a second board surface 302 away from the insert conductor 410. It can be understood that the shape of the circuit board is not limited to Figures 10 to 13 the shape shown, and it can also be an oval, rectangle, polygon or irregular shape approximately similar to the shape shown. Figures 10 to 13

[0205] As described above Figures 2 to 9 , in addition to including an open - circuit detection unit 211, a leakage detection unit 212, a driving module 220, a tripping module 230, and a test module 250 including a test switch TEST1, the detection and protection device further includes a reset button RESET. The reset button RESET includes a reset trigger rod RECFG that passes through the circuit board and is connected to the tripping module 230. Among them:

[0206] As Figure 10 and Figure 12 shown, the tripping module 230 is arranged in the middle area of the first board surface 301; on both sides of the tripping module 230, there are current - carrying conductors 260 for pressing against the insert conductor 410 to obtain power supply;

[0207] As Figure 11 and Figure 13 shown, the second board surface 302 is provided with a first area 310 at the edge of the circuit board, and the open - circuit detection unit 211 is arranged in the first area 310;

[0208] As Figure 10 shown, the first board surface 301 is provided with shield conductor solder joints 311 for welding and connecting the first shield conductor structure 130 and / or the second shield conductor structure 140 corresponding to the position of the first area 310; it should be noted that since the open - circuit detection unit 211 is arranged in the first area 310, that is, the open - circuit detection unit 211 is adjacent to the four shield conductor solder joints 311, the open - circuit detection unit 211 can process the electrical signals obtained from the four shield conductor solder joints 311 and then output a signal to the driving module 220. The electrical signals transmitted from the four shield conductor solder joints 311 do not need to be transmitted over a long distance, the circuit routing is simpler, and the anti - interference ability is stronger.

[0209] As Figure 11 and Figure 13 ​As shown, the test switch TEST1 and the reset button RESET are arranged in the middle area of the second board surface 302; the leakage detection unit 212 and the drive module 220 are arranged in the area of the second board surface 302 adjacent to the test switch TEST1 and the reset button RESET.

[0210] For the circuit board of the electrical connection device provided by the embodiment of the present invention, by arranging the first area 310 for connecting with the shielding conductor structure of the power line 100 at the edge of the circuit board, that is, the shielding conductor solder joint 311 is located at the edge of the circuit board, the soldering process between the first shielding conductor structure 130 and the second shielding conductor structure 140 and the circuit board is simpler, and it is also convenient for wire management; the open circuit detection unit 211 is located in the first area 310, so that the circuit trace between the shielding conductor solder joint 311 and the open circuit detection unit 211 is shorter, and it has strong anti-interference ability. Especially when there is a need to perform segmented detection on the first shielding conductor structure 130 and the second shielding conductor structure 140, there will be multiple connection points between the open circuit detection unit 211 and the first shielding conductor structure 130 and the second shielding conductor structure 140. The shorter distance between the shielding conductor solder joint 311 and the open circuit detection unit 211 can make the circuit trace simpler; the open circuit detection unit 211 only needs to output an open circuit fault signal to the drive module 220 after processing the open circuit conditions of the first shielding conductor structure 130 and the second shielding conductor structure 140, without setting multiple long circuit traces connecting from the first area 310 to the drive module 220; in the circuit layout of this embodiment, on the basis that the trip module 230, the test switch TEST1 and the reset button RESET occupy the main positions of the circuit board, in the limited board surface space of the circuit board, the open circuit detection unit 211, the leakage detection unit 212 and the drive module 220 are reasonably allocated in areas, which can not only simplify the wiring, improve the anti-interference ability, but also minimize the size of the circuit board as much as possible.

[0211] Refer to Figure 11 and Figure 13 In the circuit board provided by some embodiments of the present invention, the reset button RESET, the test switch TEST1 and the first area 310 are arranged in sequence along the length direction axis of the second board surface 302.

[0212] It can be understood that taking the Figure 11 or Figure 13 shown circuit board placement direction as an example, the vertical direction is the length direction of the second board surface 302. The test switch TEST1 is arranged at the middle position in the vertical direction of the second board surface 302, the reset button RESET is arranged above the test switch TEST1, and the first area 310 is located below the test switch TEST1.

[0213] Refer to Figure 11 and Figure 13, in the circuit board provided by some embodiments of the present invention, the leakage detection unit 212 is located in the left region of the test switch TEST1, and the driving module 220 is located in the left region of the reset button RESET and is adjacent to the leakage detection unit 212. The leakage detection unit 212 is close to the test switch TEST1, so that when the test switch TEST1 of the test module 250 is pressed, the transmission path of the leakage signal on the simulated first shielding conductor structure 130 and the second shielding conductor structure 140 is shorter, which is more convenient for wiring; the driving module 220 is close to the leakage detection unit 212, and the path for the leakage fault signal output by the leakage detection unit 212 to be transmitted to the driving module 220 is shorter, which is more convenient for wiring.

[0214] It can be understood that since both the test switch TEST1 and the reset button RESET are located in the middle region in the vertical direction, therefore, the leakage detection unit 212 can also be arranged in the right region of the test switch TEST1. Similarly, the driving module 220 is also correspondingly arranged in the right region of the reset button RESET and is adjacent to the leakage detection unit 212.

[0215] Refer to Figure 10 and Figure 12 , in the circuit board provided by some embodiments of the present invention, the current-carrying conductor 260 extends along the axis of the length direction of the first board surface 301. The end of the current-carrying conductor 260 far from the shielding conductor solder joint 311 is the power contact end 261 for pressing against the blade conductor 410, and the end of the current-carrying conductor 260 close to the shielding conductor solder joint 311 is the power output solder joint 262 for welding the first current-carrying line 110 or the second current-carrying line 120.

[0216] It can be understood that the trip module 230 is located in the middle region of the first board surface 301, and the two current-carrying conductors 260 are respectively located on both sides of the trip module 230, which can make the trip module 230 act to drive the two current-carrying conductors 260 to generate displacement or deformation with balanced force. In addition, relatively large devices such as the trip module 230 and the current-carrying conductor 260 are all arranged on the first board surface 301 of the circuit board, and other devices with smaller volume that need to be electrically connected through the printed circuit on the circuit board are arranged on the second board surface 302 of the circuit board, which can better realize wiring and simplify the circuit layout. In addition, the power output solder joint 262 is located at a position close to the first region 310, so that the first current-carrying line 110 and the second current-carrying line 120 do not need to extend too long on the circuit board when welding with the current-carrying conductor 260.

[0217] It should be noted that when the reset trigger rod RECFG of the reset button RESET is pressed, the power contact end 261 of the current-carrying conductor 260 can be brought into contact with the blade conductor 410, so that the mains power supply can be obtained.

[0218] In the circuit board provided by some embodiments of the present invention, the first shielding conductor structure 130 includes a first end a close to the first end of the circuit board, a second end b far from the first end a, and a third end c located between the first end a and the second end b; the second shielding conductor structure 140 includes a fourth end d close to the circuit board, a fifth end e far from the fourth end d, and a sixth end f located between the fourth end d and the fifth end e; the third end c is connected to the sixth end f; Refer to Figure 10 , four shielding conductor solder joints 311 for connecting to the first end a, the second end b, the fourth end d, and the fifth end e are provided in the first region 310.

[0219] It can be understood that since the open-circuit detection unit 211 is respectively connected to the first end a, the second end b, the fourth end d, and the sixth end f, therefore, four shielding conductor solder joints 311 are provided in the first region 310 and are respectively connected to the first end a, the second end b, the fourth end d, and the fifth end e, for example, refer to Figure 10 as shown. After the first end a, the second end b, the fourth end d, and the fifth end e are connected to the four shielding conductor solder joints 311 in the first region 310, they are then electrically connected to the open-circuit detection unit 211 through the traces on the circuit board.

[0220] In the circuit board provided by other some embodiments of the present invention, two shielding conductor solder joints 311 for connecting to the third end c and the sixth end f are further provided in the first region 310. That is to say, a total of six shielding conductor solder joints 311 are provided in the first region 310, which are respectively used for connecting to the first end a, the second end b, the third end c, the fourth end d, the fifth end e, and the sixth end f, refer to Figure 12 and Figure 13 as shown. Specifically, three shielding conductor solder joints 311 are provided at the lower left corner and the lower right corner of the first region 310 respectively.

[0221] Since the third end c and the sixth end f need to be electrically connected, in order to ensure the reliable electrical connection between the third end c and the sixth end f, two more shielding conductor solder joints 311 are provided in the first region 310, so that the third end c and the sixth end f can be led to the circuit board and electrically connected through the circuit board.

[0222] Refer to Figures 2 to 7, in the circuit board provided by some embodiments of the present invention, the open - circuit detection unit 211 includes a first switch unit 201 and a second switch unit 202; the first switch unit 201 includes a first triode Q1 and a first resistor R1 for providing a conduction voltage to the first triode Q1; the second switch unit 202 includes a second triode Q2 and a fourth resistor R4 for providing a conduction voltage to the second triode Q2. Further, the first switch unit 201 further includes a second resistor R2 and a third resistor R3. One end of the second resistor R2 is connected to the second current - carrying line 120, and the other end of the second resistor R2 is connected to one end of the first resistor R1 and the emitter of the first triode Q1. The other end of the first resistor R1 is connected to the base of the first triode Q1 and one end of the third resistor R3, and the other end of the third resistor R3 is connected to the first current - carrying line 110; the second switch unit 202 further includes a fifth resistor R5 and a sixth resistor R6. One end of the fifth resistor R5 is connected to the second current - carrying line 120, and the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the emitter of the second triode Q2. The other end of the fourth resistor R4 is connected to the base of the second triode Q2 and one end of the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the first current - carrying line 110; the collectors of the first triode Q1 and the second triode Q2 are connected to the driving module 220. Refer to Figure 8 and Figure 9, in the circuit board provided by some embodiments of the present invention, the open circuit detection unit includes a first switch unit 201 and a second switch unit 202; the first switch unit 201 includes a first triode Q1 and a first voltage dividing unit; the second switch unit 202 includes a second triode Q2 and a second voltage dividing unit; the first voltage dividing unit includes a second resistor R2, a first resistor R1, a seventeenth resistor R17, and a third resistor R3 connected in series in sequence, and the second voltage dividing unit includes a fifth resistor R5, a fourth resistor R4, an eighteenth resistor R18, and a sixth resistor R6 connected in series in sequence; the connection point of the second resistor R2 and the first resistor R1 is connected to the shield conductor solder joint corresponding to the first end a and the emitter of the first triode Q1; the connection point of the first resistor R1 and the seventeenth resistor R17 is connected to the base of the first triode Q1; the connection point of the seventeenth resistor R17 and the third resistor R3 is connected to the shield conductor solder joint corresponding to the fourth end d; the connection point of the fifth resistor R5 and the fourth resistor R4 is connected to the shield conductor solder joint corresponding to the second end b and the emitter of the second triode Q2; the connection point of the fourth resistor R4 and the eighteenth resistor R18 is connected to the base of the second triode Q2; the connection point of the eighteenth resistor R18 and the sixth resistor R6 is connected to the shield conductor solder joint corresponding to the fifth end e; the second resistor R2 and the fifth resistor R5 are connected together and connected to the second current-carrying line 120, and the third resistor R3 and the sixth resistor R6 are connected together and connected to the first current-carrying line 110; the collector of the first triode Q1 and the collector of the second triode Q2 are connected to the driving module 220. It should be noted that the end of the second resistor R2 connected to the second current-carrying line 120 can be directly connected to the second current-carrying line 120, or can be indirectly connected to the second current-carrying line 120 via a trip coil Lx as Figures 2 to 9 ; similarly, the end of the fifth resistor R5 connected to the second current-carrying line 120 can be directly connected to the second current-carrying line 120, or can be indirectly connected to the second current-carrying line 120 via a trip coil Lx as Figures 2 to 5 . In addition, the end of the third resistor R3 connected to the first current-carrying line 110 can be directly connected to the first current-carrying line 110, or can be indirectly connected to the first current-carrying line 110 via a first diode D1 as Figures 2 to 9 ; similarly, the end of the sixth resistor R6 connected to the first current-carrying line 110 can be directly connected to the first current-carrying line 110, or can be indirectly connected to the first current-carrying line 110 via a first diode D1 as Figures 2 to 9 .

[0223] Referring to Figure 11 shown, Figures 2 to 7 in the embodiment shown, the first triode Q1, the second triode Q2, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are all arranged in the first area 310. Referring to Figure 13 shown,Figures 8 to 9 The first triode Q1, the second triode Q2, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventeenth resistor R17, and the eighteenth resistor R18 in the illustrated embodiment are all arranged in the first region 310.

[0224] It can be understood that, in order to detect the open - circuit conditions of the first shielding conductor structure 130 and the second shielding conductor structure 140, the open - circuit detection unit 211 is provided with a relatively large number of triode components and resistor components, and the connection relationship is complex. Therefore, all the components of the open - circuit detection unit 211 are arranged in the first region 310, so that electrical connection with the shielding conductor solder joint 311 can be achieved through relatively short wiring; arranging the components included in the open - circuit detection unit 211 in a concentrated area can also help reduce the layout size required on the circuit board.

[0225] Referring to Figures 5 to 7 , in the circuit board provided by some embodiments of the present invention, the leakage detection unit 212 includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a third triode Q3; one end of the fourteenth resistor R14 is connected to the second current - carrying line 120, the other end of the fourteenth resistor R14 is connected to one end of the fifteenth resistor R15 and the base of the third triode Q3, the emitter of the third triode Q3 is connected to any shielding conductor solder joint 311, the other end of the fifteenth resistor R15 is connected to the first current - carrying line 110, the collector of the third triode Q3 is connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to the drive module 220. Additionally, referring to Figure 9 , in the circuit board provided by some embodiments of the present invention, the leakage detection unit 212 includes a fourteenth resistor R14, a fifteenth resistor R15, a third triode Q3, and a third diode D3. One end of the fourteenth resistor R14 is connected to the second current - carrying line 120, the other end of the fourteenth resistor R14 is connected to one end of the fifteenth resistor R15 and the base of the third triode Q3, the emitter of the third triode Q3 is connected to the negative electrode of the third diode D3, the positive electrode of the third diode D3 is connected to the shielding conductor solder joint corresponding to the sixth terminal f, the other end of the fifteenth resistor R15 is connected to the first current - carrying line 110, and the collector of the third triode Q3 is connected to the drive module 220. It should be noted that the end of the fourteenth resistor R14 connected to the second current - carrying line 120 can be directly connected to the second current - carrying line 120, or it can be indirectly connected to the second current - carrying line 120 via a trip coil Lx as Figures 5 to 7 and Figure 9 ; the end of the fifteenth resistor R15 connected to the first current - carrying line 110 can be directly connected to the first current - carrying line 110, or it can be as Figures 5 to 7 and Figure 9is generally indirectly connected to the first current-carrying line 110 via the first diode D1. Refer to Figure 11 , Figures 5 to 7 In the embodiment shown, the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16, and the third triode Q3 are all arranged in the second region 320 on the second board surface 302 to the left of the test switch TEST1. Refer to Figure 13 , Figures 9 to 7 In the embodiment shown, the fourteenth resistor R14, the fifteenth resistor R15, the third triode Q3, and the third diode D3 are all arranged in the second region 320 on the second board surface 302 to the left of the test switch TEST1.

[0226] It can be understood that the leakage detection unit 212 detects the leakage of the first shielding conductor structure 130 and the second shielding conductor structure 140 by using a triode device in cooperation with multiple resistor devices. Concentrating the components included in the leakage detection unit 212 in the second region 320 to the left of the test switch TEST1 is beneficial to reducing the layout size required by the leakage detection unit 212 on the circuit board.

[0227] Refer to Figures 2 to 4 , in the circuit board provided in some embodiments of the present invention, the leakage detection unit 212 includes an eleventh resistor R11 and a voltage stabilization unit ZD1. The positive electrode of the voltage stabilization unit ZD1 is connected to the driving module 220, the negative electrode of the voltage stabilization unit ZD1 is connected to one end of the eleventh resistor R11, and the other end of the eleventh resistor R11 is connected to any shielding conductor solder joint 311; the eleventh resistor R11 and the voltage stabilization unit ZD1 are both arranged in the second region 320 on the second board surface 302 to the left of the test switch TEST1. Additionally, refer to Figure 8 , in the circuit board provided in some embodiments of the present invention, the leakage detection unit 212 includes an eleventh resistor R11 and a voltage stabilization unit ZD1. The positive electrode of the voltage stabilization unit ZD1 is connected to the driving module 220, the negative electrode of the voltage stabilization unit ZD1 is connected to one end of the eleventh resistor R11, and the other end of the eleventh resistor R11 is connected to the shielding conductor solder joint corresponding to the sixth terminal f; the eleventh resistor R11 and the voltage stabilization unit ZD1 are both arranged in the second region 320 on the second board surface 302 to the left of the test switch TEST1.

[0228] It can be understood that the leakage detection unit 212 detects the leakage of the first shielding conductor structure 130 and the second shielding conductor structure 140 by using the voltage stabilization unit ZD1 in cooperation with resistor elements. Concentrating the components included in the leakage detection unit 212 in the second region 320 to the left of the test switch TEST1 is beneficial to reducing the layout size required by the leakage detection unit 212 on the circuit board.

[0229] Refer to Figures 2 to 7, in the circuit board provided by some embodiments of the present invention, the driving module 220 includes a thyristor Q4, a seventh resistor R7, a tenth resistor R10, and a first capacitor C1; the detection and protection device further includes a trip coil Lx. The second current-carrying line 120 is connected to one end of the trip coil Lx, the other end of the trip coil Lx is connected to the anode of the thyristor Q4, the control electrode of the thyristor Q4 is connected to one end of the seventh resistor R7, one end of the tenth resistor R10, one end of the first capacitor C1, and the leakage detection unit 212. The other end of the tenth resistor R10 is connected to the open-circuit detection unit 211. The cathode of the thyristor Q4, the other end of the first capacitor C1, and the other end of the seventh resistor R7 are all connected to the first current-carrying line 110; it should be noted that the cathode of the thyristor Q4, the first capacitor C1 connected to one end of the first current-carrying line 110, and the seventh resistor R7 connected to one end of the first current-carrying line 110 can be directly connected to the first current-carrying line 110, or can be indirectly connected to the first current-carrying line 110 via a first diode D1 as shown in Figures 5 to 7 . Referring to Figure 11 and Figure 13 , the thyristor Q4, the seventh resistor R7, the tenth resistor R10, and the first capacitor C1 are all arranged in the third area 330 on the second board surface 302 to the left of the reset button RESET.

[0230] It can be understood that in order to respond to the open-circuit fault signal output by the open-circuit detection unit 211 and the leakage fault signal transmitted by the leakage detection unit 212, the driving module 220 uses a thyristor device, a capacitor clamping, and multiple resistor devices, and centrally arranges the components included in the driving module 220 in the third area 330 to the left of the reset button RESET, which is beneficial to reducing the layout size required by the driving module 220 on the circuit board.

[0231] In addition, referring to Figure 8 and Figure 9 , in the circuit board provided by some embodiments of the present invention, the test module 250 further includes an eighth resistor R8. One end of the test switch TEST1 is connected to the connection point of the second resistor R2 and the fifth resistor R5, the other end of the test switch TEST1 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the shield conductor solder joint corresponding to the third terminal c; as shown in Figure 13 , the eighth resistor R8 is arranged in the middle area of the second board surface 302 and is disposed adjacent to the test switch TEST1.

[0232] In the circuit board provided by some embodiments of the present invention, the length dimension range of the circuit board is 56 mm ± 10 mm, and the width dimension range is 36 mm ± 10 mm; the length dimension range of the first region 310 is 30 mm ± 3 mm, and the width dimension range is 8.5 mm ± 10 mm; the length dimension range of the arrangement region of the leakage detection unit 212 on the second board surface 302 is 10 mm ± 3 mm, and the width dimension range is 8 mm ± 3 mm; the length dimension range of the arrangement region of the drive module 220 on the second board surface 302 is 15 mm ± 3 mm, and the width dimension range is 10 mm ± 3 mm.

[0233] It can be understood that Figures 2 to 9 For the detection and protection device shown, in order to detect the leakage and open - circuit conditions of the shielding conductor structure of the power line, a relatively large number of switching devices, diode devices, resistor devices, capacitor devices, etc. need to be configured. In the circuit board provided by the embodiments of the present invention, on the basis that the trip module 230, the test switch TEST1, and the reset button RESET occupy the main positions of the circuit board, in the limited board surface space of the circuit board, the open - circuit detection unit 211, the leakage detection unit 212, and the drive module 220 are reasonably allocated in terms of area arrangement, which can not only simplify the wiring and improve the anti - interference ability, but also minimize the size of the circuit board as much as possible.

[0234] Referring to Figure 10 , in the circuit board provided by some embodiments of the present invention, the first varistor ZR1 in the lightning protection unit 270 is arranged in the middle area of the first board surface 301 corresponding to the first region 310, and two shielding conductor solder joints 311 are respectively arranged on both sides of the first varistor ZR1. Referring to Figure 12 , three shielding conductor solder joints 311 are respectively arranged on both sides of the first varistor ZR1.

[0235] It can be understood that the first varistor ZR1 in the lightning protection unit 270 has a relatively large volume. By arranging it in the middle area of the first board surface 301 corresponding to the first region 310, the four shielding conductor solder joints 311 are separated in pairs, avoiding the difficulty in soldering caused by arranging all four shielding conductor solder joints 311 in a relatively small area.

[0236] In addition, referring to Figure 10 and Figure 12 , the second varistor ZR2 is arranged in the left - hand area of the trip module 230 on the first board surface 301. Referring to Figure 11 and Figure 13 , the free - wheeling module composed of the first diode D1 and the second diode D2 in the detection and protection device is arranged in the right - hand area of the test module 250 on the second board surface 302. In addition, referring to Figure 11 and Figure 13, a solder joint of the trip coil Lx may also be provided below the test module 250 of the second board surface 302.

[0237] It should be noted that in this application Figures 10 to 13 , the placement positions of the components in each module can be swapped with each other Figures 10 to 13 , and only one layout form is drawn.

[0238] According to the circuit board provided by some embodiments of the present invention, the components in the open - circuit detection unit 211, the leakage detection unit 212, the drive module 220, and the trip module 230 are packaged by surface - mount or by plug - in.

[0239] According to the circuit board provided by some embodiments of the present invention, the circuit board adopts the wiring method of single - sided board, double - sided board or multi - layer board.

[0240] According to the circuit board provided by some embodiments of the present invention, the circuit board is processed by wave soldering, reflow soldering or manual method.

[0241] In addition, the second - aspect embodiment of the present invention provides an electrical connection device, including the circuit board as in the first - aspect embodiment above, a power cord 100, a detection and protection device arranged on the circuit board and connected to the power cord 100, and a housing 400 wrapping the circuit board; a blade conductor 410 for accessing the power supply is arranged on the housing 400.

[0242] According to the electrical connection device provided by some embodiments of the present invention, a wire clip for clamping the power cord 100 is arranged at the connection between the housing 400 and the power cord 100;

[0243] It can be understood that by setting the wire clip to fix the power cord 100, it can be avoided that the power cord 100 is easily dragged by external force, causing the disconnection of each port connected to the detection and protection device.

[0244] The first shielding conductor structure 130 includes a first end a close to the circuit board, a second end b far from the first end a, and a third end c located between the first end a and the second end b; the second shielding conductor structure 140 includes a fourth end d close to the circuit board, a fifth end e far from the fourth end d, and a sixth end f located between the fourth end d and the fifth end e;

[0245] The third end c and the sixth end f are electrically connected through one of the following three situations:

[0246] Situation 1: Welding connection at the wire clip;

[0247] Situation 2: Welding connection inside the housing 400;

[0248] Situation 3: Leading to the shielding conductor solder joint 311 to achieve electrical connection through the circuit board.

[0249] It can be understood that the connection position of the third end c of the first shielding conductor structure 130 and the sixth end f of the second shielding conductor structure 140 can be flexibly set at different positions according to the actual situation. For example, in the first case where it is set at the wire clamp, the wire clamp can clamp the welding part of the third end c and the sixth end f while clamping the power cord 100, avoiding the easy loosening and falling off of the welding part. In the second case where it is set inside the housing 400, the welding connection space between the third end c and the sixth end f is larger and the operation is convenient. In the third case where it is led to the shielding conductor solder joint 311, the third end c, the sixth end f, the first end a, the second end b, the fourth end d and the fifth end e are welded and connected to the circuit board together, which can make the connection between the circuit board and the first shielding conductor structure 130 and the second shielding conductor structure 140 more stable and reliable. Moreover, the electrical connection between the third end c and the sixth end f through the circuit board can also be more reliable and is not prone to connection disconnection.

[0250] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A circuit board for an electrical connection device, characterized in that: The electrical connection device comprises a power line, a detection protection device arranged on the circuit board and connected to the power line, and a shell wrapping the circuit board; the shell is provided with a plug conductor for connecting to a power source; The power line includes a first current-carrying line, a second current-carrying line, a first shielding conductor structure covering the first current-carrying line, and a second shielding conductor structure covering the second current-carrying line; The detection protection device includes an open circuit detection unit, a leakage detection unit, a drive module, a trip module, a test module including a test switch, and a reset button; The circuit board comprises a first board surface facing the plug conductor and a second board surface away from the plug conductor; The trip module is arranged in the middle area of ​​the first panel; current-carrying conductors for contacting and pressing with the plug conductor to obtain power are arranged on both sides of the trip module; The second board surface is provided with a first area located at the edge of the circuit board, the open circuit detection unit is provided in the first area, and the first board surface is provided with a shielding conductor welding point for welding and connecting the first shielding conductor structure and / or the second shielding conductor structure at a position corresponding to the first area; The test switch and the reset button are arranged in the middle area of ​​the second board surface; the leakage detection unit and the driving module are arranged in the area of ​​the second board surface adjacent to the test switch and the reset button.

2. The circuit board according to claim 1, characterized in that: The reset button, the test switch and the first area are arranged in sequence along the longitudinal axis of the second panel.

3. The circuit board according to claim 2, characterized in that: The leakage detection unit is located in the left area of ​​the test switch, and the driving module is located in the left area of ​​the reset button and is adjacent to the leakage detection unit; or, The leakage detection unit is located in a right area of ​​the test switch, and the driving module is located in a right area of ​​the reset button and is adjacent to the leakage detection unit.

4. The circuit board according to claim 2, characterized in that: The current-carrying conductor extends along the longitudinal axis of the first board surface, and the end of the current-carrying conductor away from the shielding conductor solder joint is a power contact end for contacting the plug conductor, and the end of the current-carrying conductor close to the shielding conductor solder joint is a power output solder joint for welding the first current-carrying line or the second current-carrying line.

5. The circuit board according to claim 1, characterized in that: The first shielding conductor structure includes a first end close to the circuit board, a second end away from the first end, and a third end located between the first end and the second end; the second shielding conductor structure includes a fourth end close to the circuit board, a fifth end away from the fourth end, and a sixth end located between the fourth end and the fifth end; the third end is connected to the sixth end; the first area is provided with four shielding conductor solder joints respectively used to connect to the first end, the second end, the fourth end, and the fifth end.

6. The circuit board according to claim 5, characterized in that: The first region is further provided with two shielding conductor welding points for connecting to the third end and the sixth end respectively.

7. The circuit board according to claim 1, characterized in that: The open circuit detection unit includes a first switch unit and a second switch unit; the first switch unit includes a first transistor and a first resistor providing a turn-on voltage for the first transistor; the second switch unit includes a second transistor and a fourth resistor providing a turn-on voltage for the second transistor; in: Two ends of the first resistor are electrically connected to shielded conductor welding points corresponding to the first end and the fourth end, respectively, and two ends of the fourth resistor are electrically connected to shielded conductor welding points corresponding to the second end and the fifth end, respectively; or, Two ends of the first resistor are electrically connected to shielded conductor solder joints corresponding to the first end and the fifth end, respectively, and two ends of the fourth resistor are electrically connected to shielded conductor solder joints corresponding to the second end and the fourth end, respectively.

8. The circuit board according to claim 7, characterized in that: The first switch unit further includes a second resistor and a third resistor, one end of the second resistor is connected to the second current-carrying line, the other end of the second resistor is connected to one end of the first resistor and the emitter of the first transistor, the other end of the first resistor is connected to the base of the first transistor and one end of the third resistor, and the other end of the third resistor is connected to the first current-carrying line; the second switch unit further includes a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to the second current-carrying line, the other end of the fifth resistor is connected to one end of the fourth resistor and the emitter of the second transistor, the other end of the fourth resistor is connected to the base of the second transistor and one end of the sixth resistor, and the other end of the sixth resistor is connected to the first current-carrying line; The collector of the first transistor and the collector of the second transistor are connected to the driving module; The first transistor, the second transistor, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor and the sixth resistor are all arranged in the first area.

9. The circuit board according to claim 6, characterized in that: The open circuit detection unit includes a first switch unit and a second switch unit; The first switch unit includes a first transistor and a first voltage dividing unit; the first voltage dividing unit includes a second resistor, a first resistor, a seventeenth resistor and a third resistor connected in series in sequence; The second switch unit includes a second triode and a second voltage dividing unit; the second voltage dividing unit includes a fifth resistor, a fourth resistor, an eighteenth resistor and a sixth resistor connected in series in sequence; The connection point between the second resistor and the first resistor is connected to the shielding conductor welding point corresponding to the first end and the emitter of the first transistor; the connection point between the first resistor and the seventeenth resistor is connected to the base of the first transistor; the connection point between the seventeenth resistor and the third resistor is connected to the shielding conductor welding point corresponding to the fourth end; the connection point between the fifth resistor and the fourth resistor is connected to the shielding conductor welding point corresponding to the second end and the emitter of the second transistor; the connection point between the fourth resistor and the eighteenth resistor is connected to the base of the second transistor; the connection point between the eighteenth resistor and the sixth resistor is connected to the shielding conductor welding point corresponding to the fifth end; the second resistor and the fifth resistor are connected together and connected to the second current-carrying line, and the third resistor and the sixth resistor are connected together and connected to the first current-carrying line; The collector of the first transistor and the collector of the second transistor are connected to the driving module; The first transistor, the second transistor, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventeenth resistor and the eighteenth resistor are all arranged in the first area.

10. The circuit board according to claim 9, characterized in that: The leakage detection unit includes a fourteenth resistor, a fifteenth resistor, a third transistor and a third diode, one end of the fourteenth resistor is connected to the second current-carrying line, the other end of the fourteenth resistor is connected to one end of the fifteenth resistor and the base of the third transistor, the emitter of the third transistor is connected to the cathode of the third diode, the anode of the third diode is connected to the shielding conductor welding point corresponding to the sixth end, the other end of the fifteenth resistor is connected to the first current-carrying line, and the collector of the third transistor is connected to the driving module; The fourteenth resistor, the fifteenth resistor, the third transistor and the third diode are all arranged in a second area on the second board surface and located on the left side of the test switch.

11. The circuit board according to claim 9, characterized in that: The leakage detection unit includes an eleventh resistor and a voltage stabilizing unit, wherein the positive electrode of the voltage stabilizing unit is connected to the driving module, the negative electrode of the voltage stabilizing unit is connected to one end of the eleventh resistor, and the other end of the eleventh resistor is connected to the shielding conductor welding point corresponding to the sixth end; The eleventh resistor and the voltage stabilizing unit are both arranged in a second area on the second board surface and located on the left side of the test switch.

12. The circuit board according to claim 10 or 11, characterized in that: The test module further includes an eighth resistor, one end of the test switch is connected to a connection point between the second resistor and the fifth resistor, the other end of the test switch is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to a shield conductor welding point corresponding to the third end; The eighth resistor is arranged in the middle area of ​​the second board surface and is disposed adjacent to the test switch.

13. The circuit board according to claim 2, characterized in that: The leakage detection unit includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a third transistor, one end of the fourteenth resistor is connected to the second current-carrying line, the other end of the fourteenth resistor is connected to one end of the fifteenth resistor and the base of the third transistor, the emitter of the third transistor is connected to any of the shielding conductor welding points, the other end of the fifteenth resistor is connected to the first current-carrying line, the collector of the third transistor is connected to one end of the sixteenth resistor, and the other end of the sixteenth resistor is connected to the driving module; the fourteenth resistor, the fifteenth resistor, the sixteenth resistor and the third transistor are all arranged in a second area on the second board surface located on the left side of the test switch.

14. The circuit board according to claim 2, characterized in that: The leakage detection unit includes an eleventh resistor and a voltage stabilizing unit, the positive electrode of the voltage stabilizing unit is connected to the driving module, the negative electrode of the voltage stabilizing unit is connected to one end of the eleventh resistor, and the other end of the eleventh resistor is connected to any one of the shielded conductor solder joints; the eleventh resistor and the voltage stabilizing unit are both arranged in a second area on the second board surface located on the left side of the test switch.

15. The circuit board according to claim 2, characterized in that: The driving module includes a thyristor, a seventh resistor, a tenth resistor and a first capacitor, the detection and protection device also includes a tripping coil, the second current-carrying line is connected to one end of the tripping coil, the other end of the tripping coil is connected to the anode of the thyristor, the control electrode of the thyristor is connected to one end of the seventh resistor, one end of the tenth resistor, one end of the first capacitor and the leakage detection unit, the other end of the tenth resistor is connected to the open circuit detection unit, the cathode of the thyristor, the other end of the first capacitor and the other end of the seventh resistor are all connected to the first current-carrying line; the thyristor, the seventh resistor, the tenth resistor and the first capacitor are all arranged in a third area on the second board surface located on the left side of the reset button.

16. The circuit board according to claim 1, characterized in that: The length dimension range of the circuit board is 56mm±10mm, and the width dimension range is 36mm±10mm; the length dimension range of the first area is 30mm±3mm, and the width dimension range is 8.5mm±10mm; the length dimension range of the layout area of ​​the leakage detection unit on the second board surface is 10mm±3mm, and the width dimension range is 8mm±3mm; the length dimension range of the layout area of ​​the drive module on the second board surface is 15mm±3mm, and the width dimension range is 10mm±3mm.

17. The circuit board according to claim 1, characterized in that: The components in the open circuit detection unit, the leakage detection unit, the driving module and the tripping module are packaged by chip or plug-in.

18. The circuit board according to claim 1, characterized in that: The circuit board adopts a single-sided board, a double-sided board or a multi-layer board routing method.

19. The circuit board according to claim 1, characterized in that: The circuit board is processed by wave soldering, reflow soldering or manual processing.

20. An electrical connection device, characterized in that: It comprises the circuit board according to any one of claims 1 to 19, a power cord, a detection protection device arranged on the circuit board and connected to the power cord, and a shell wrapping the circuit board; the shell is provided with a plug conductor for connecting to a power supply.

21. The electrical connection device according to claim 20, characterized in that A wire clip for clamping the power line is provided at the connection between the housing and the power line; The first shielding conductor structure comprises a first end close to the circuit board, a second end away from the first end, and a third end located between the first end and the second end; the second shielding conductor structure comprises a fourth end close to the circuit board, a fifth end away from the fourth end, and a sixth end located between the fourth end and the fifth end; the third end and the sixth end are electrically connected by one of the following three situations: Situation 1: welding connection at the line card; Case 2: welding connection inside the shell; Case 3: Connecting to the shield conductor solder joint to achieve electrical connection through the circuit board.

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