Circuit board for electrical connection device and electrical connection device

Abstract

Disclosed in the present application are a circuit board for an electrical connection device and an electrical connection device. The electrical connection device comprises a power line (100), a detection protection apparatus and a housing (400); the detection protection apparatus comprises an open-circuit detection unit (211), an electric leakage detection unit (212), a driving module (220), a tripping module (230), a test module (2250) comprising a test switch, and a reset button; the circuit board comprises a first board surface (301) and a second board surface (302); the tripping module (230) is arranged in the middle area of the first board surface (301); current-carrying conductors (260) are provided on two sides of the tripping module (230); the second board surface (302) is provided with a first area located at the edge of the circuit board; the open-circuit detection unit (211) is arranged in the first area; the position of the first board surface (301) corresponding to the first area is provided with a shield conductor solder joint (311); the test switch and the reset button are arranged in the middle area of the second board surface (302); and the electric leakage detection unit (212) and the driving module (220) are arranged in the area of the second board surface (302) adjacent to the test switch and the reset button.

Description

Circuit board for electrical connection device and electrical connection device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311621811.9 filed on November 29, 2023, entitled “Circuit board for electrical connection device and electrical connection device”, and application number 202323249072.3 filed on November 29, 2023, entitled “Circuit board for electrical connection device and electrical connection device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of circuit boards, and in particular to a circuit board for an electrical connection device and an electrical connection device. Background Art

[0004] A leakage circuit detector interrupter (LCDI) is a power connection device for electrical appliances. It detects leakage current in the power cord through a leakage current detection line and, when a certain leakage current is detected, disconnects the appliance from the power supply, ensuring safe use. In recent years, leakage current detection circuit breakers have not only required leakage current detection through the leakage current detection line, but have also introduced higher safety detection requirements, such as the need to detect whether the leakage current detection line is open.

[0005] At present, with the increasing demand for safety detection of power line detection and protection devices, the number of components in the circuit modules included in the detection and protection devices is also increasing. Therefore, the circuit board layout of electrical connection equipment is also facing more and more challenges, such as difficulty in circuit board routing, the electrical signals transmitted on the circuit board are easily interfered with, and the large board size required for the circuit board.

[0006] Summary of the Invention

[0007] The purpose of the present application is to at least partially solve 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.

[0008] In a first aspect, some embodiments of the present application provide a circuit board for an electrical connection device, the electrical connection device comprising a power cord, a detection and protection device disposed on the circuit board and connected to the power cord, and a housing enclosing the circuit board; the housing being provided with a plug conductor for connecting to a power source;

[0009] 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;

[0010] The detection and 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;

[0011] The circuit board comprises a first board surface facing the plug conductor and a second board surface away from the plug conductor;

[0012] The trip module is arranged in the middle area of ​​the first panel; current-carrying conductors for contacting and pressing the plug conductors to obtain power are arranged on both sides of the trip module;

[0013] The second board surface is provided with a first area located at an edge of the circuit board, the open circuit detection unit is provided in the first area, and a shielding conductor soldering point for welding and connecting the first shielding conductor structure and / or the second shielding conductor structure is provided at a position of the first board surface corresponding to the first area;

[0014] 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.

[0015] According to the circuit board provided in some embodiments of the present application, the reset button, the test switch and the first area are arranged in sequence along the longitudinal axis of the second board surface.

[0016] According to the circuit board provided in some embodiments of the present application, 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;

[0017] or,

[0018] 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.

[0019] 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 shielded conductor structure and the second shielded 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.

[0020] According to the circuit boards provided in some embodiments of the present application, the current-carrying conductor extends along the longitudinal axis of the first board surface, the end of the current-carrying conductor away from the shielding conductor solder point is a power contact end for contacting the plug conductor, and the end of the current-carrying conductor close to the shielding conductor solder point is a power output solder point for welding the first current-carrying line or the second current-carrying line.

[0021] According to the circuit boards provided in some embodiments of the present application, 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; and the first area is provided with four shielding conductor solder joints for connecting to the first end, the second end, the fourth end, and the fifth end, respectively.

[0022] According to the circuit board provided in some embodiments of the present application, the first area is further provided with two shielding conductor solder joints for connecting to the third end and the sixth end respectively.

[0023] According to the circuit board provided in some embodiments of the present application, 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;

[0024] in:

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

[0026] or,

[0027] Both ends of the first resistor are electrically connected to the shielding conductor solder joints corresponding to the first end and the fifth end, respectively. Both ends of the fourth resistor are electrically connected to the shielding conductor solder joints corresponding to the second end and the fourth end, respectively.

[0028] According to the circuit board provided in some embodiments of the present application, the first switching unit also 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 switching unit also 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.

[0029] According to the circuit board provided in some embodiments of the present application, 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 one of the shielding conductor solder joints, 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 the second area on the second board surface, located to the left of the test switch.

[0030] According to the circuit board provided in some embodiments of the present application, the leakage detection unit includes an eleventh resistor and a voltage stabilizing unit, the positive pole of the voltage stabilizing unit is connected to the driving module, the negative pole 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 shielding conductor solder joints; the eleventh resistor and the voltage stabilizing unit are both arranged in the second area on the second board surface, located to the left of the test switch.

[0031] According to the circuit board provided in some embodiments of the present application, 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 the third area on the second board surface located to the left of the reset button.

[0032] According to some embodiments of the present application, the circuit board has a length dimension range of 56mm±10mm and a width dimension range of 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.

[0033] According to the circuit board provided in some embodiments of the present application, the components in the open circuit detection unit, the leakage detection unit, the driving module and the tripping module are packaged using surface mount packaging or plug-in packaging.

[0034] According to the circuit boards provided in some embodiments of the present application, the circuit boards adopt a single-sided board, a double-sided board or a multi-layer board routing method.

[0035] According to the circuit boards provided in some embodiments of the present application, the circuit boards are processed by wave soldering, reflow soldering or manual methods.

[0036] In the second aspect, an embodiment of the present application provides an electrical connection device, including a circuit board as described in the embodiment of the first aspect above, a power cord, a detection and protection device arranged on the circuit board and connected to the power cord, and a shell that wraps the circuit board; the shell is provided with a plug conductor for connecting to a power supply.

[0037] According to the electrical connection device provided in some embodiments of the present application, a wire clip for clamping the power cord is provided at the connection between the housing and the power cord;

[0038] 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;

[0039] The third end and the sixth end are electrically connected by one of the following three situations:

[0040] Case 1: Soldering the connection at the line card;

[0041] Case 2: welding connection inside the shell;

[0042] Case 3: Connecting to the shield conductor solder joint to achieve electrical connection through the circuit board.

[0043] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0045] The present application is further described below with reference to the accompanying drawings and embodiments;

[0046] FIG1 is a schematic diagram of the overall structure of an electrical connection device provided in an embodiment of the present application;

[0047] FIG2 is a circuit diagram of a detection and protection device for a power line provided by one embodiment of the present application;

[0048] FIG3 is a circuit diagram of a power line detection and protection device provided by another embodiment of the present application;

[0049] FIG4 is a circuit diagram of a detection and protection device for a power line according to another embodiment of the present application;

[0050] FIG5 is a circuit diagram of a detection and protection device for a power line provided in yet another embodiment of the present application;

[0051] FIG6 is a schematic diagram of the layout of the first board surface of the circuit board of the electrical connection device provided in an embodiment of the present application; and

[0052] FIG7 is a schematic diagram of the layout of the second surface of the circuit board of the electrical connection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0054] In the description of the embodiments of this application, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. "At least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If "first," "second," or the like is used in the description, it is only for the purpose of distinguishing technical features and cannot be understood to indicate or imply relative importance, or to implicitly indicate the number of the indicated technical features, or to implicitly indicate the order of the indicated technical features.

[0055] It should be noted that the terms "set," "install," and "connect" in the embodiments of this application should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of this application based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can refer to direct connection or indirect connection through an intermediary.

[0056] It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0057] A leakage current detection circuit breaker (LCDI) is a power connection device for electrical appliances that can detect the leakage current of a power cord group through a leakage current detection line, and cut off the power connection of the appliance when a certain leakage current is detected, ensuring safe use. In recent years, in addition to the need to detect the leakage current of the power cord through the leakage current detection line, leakage current detection circuit breakers have also put forward higher safety detection requirements, such as the need to detect whether the leakage current detection line has an open circuit. At present, as the demand for safety detection of power cord detection and protection devices becomes higher and higher, the number of components of the circuit modules included in the detection and protection devices is also increasing. Therefore, the circuit board layout of electrical connection equipment is also facing more and more challenges, such as the difficulty of routing the circuit board, the electrical signals transmitted on the circuit board are easily interfered with, and the circuit board requires a large board size.

[0058] Based on this, the embodiments of the present application provide a circuit board layout circuit board and an electrical connection device for an electrical connection device, which can simplify routing, improve anti-interference capabilities, and minimize the size of the circuit board.

[0059] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0060] Figure 1 is a schematic diagram of the overall structure of an electrical connection device provided in an embodiment of the present application. The electrical connection device includes a power cord 100, a detection and protection device attached to a circuit board and connected to the power cord 100, and a housing 400 enclosing the circuit board. Housing 400 is provided with a plug-in conductor 410 for connecting to a power source. The circuit board is located inside housing 400 and is therefore not shown in Figure 1.

[0061] FIG2 to FIG5 are circuit diagrams of a detection and protection device for a power line 100 according to some embodiments of the present application. Specifically:

[0062] The power cord 100 includes a first current-carrying wire 110, a second current-carrying wire 120, a first shielded conductor structure 130 covering the first current-carrying wire 110, and a second shielded conductor structure 140 covering the second current-carrying wire 120; the first shielded conductor structure 130 includes a first end a close to the circuit board, a second end b away from the first end a, and a third end c located between the first end a and the second end b; the second shielded conductor structure 140 includes a fourth end d close to the circuit board, a fifth end e away 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 shielding conductor structure 130 covers the first current-carrying line 110 so that the leakage signal of the first current-carrying line 110 can be collected, and the second shielding conductor structure 140 covers the second current-carrying line 120 so that the leakage signal of the second current-carrying line 120 can be collected. On this basis, by connecting the third end c in the middle of the first shielding conductor structure 130 with the sixth end f in the second shielding conductor structure 140, a connection point exists between the shielding conductor structures of the first current-carrying line 110 and the second current-carrying line 120, and the two shielding conductor structures are no longer independent and separated; so that the first shielding conductor structure 130 and the second shielding conductor structure 140 can construct a variety of different detection paths for open circuit detection, for example, the first end c of the first shielding conductor structure 130 can be connected to the sixth end f of the second shielding conductor structure 140. The detection path is from the first end a to the third end c, then to the sixth end f of the second shielding conductor structure 140, and finally to the fourth end d of the second shielding conductor structure 140; the detection path is from the first end a of the first shielding conductor structure 130 to the third end c, then to the sixth end f of the second shielding conductor structure 140, and finally to the fifth end e of the second shielding conductor structure 140; the detection path is from the second end b of the first shielding conductor structure 130 to the third end c, then to the sixth end f of the second shielding conductor structure 140, and finally to the fourth end d of the second shielding conductor structure 140; the detection path is from the second end b of the first shielding conductor structure 130 to the third end c, then to the sixth end f of the second shielding conductor structure 140, and finally to the fifth end e of the second shielding conductor structure 140.

[0063] 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; wherein:

[0064] 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 transistor Q1, a first resistor R1, a second resistor R2, and a third resistor R3; the second switch unit 202 includes a second transistor Q2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6.

[0065] The leakage detection unit 212 includes a voltage stabilizing unit ZD1 and an eleventh resistor R11 in the embodiments shown in FIG2 and FIG3 ; the leakage detection unit 212 includes a third transistor Q3, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16 and a third diode D3 in the embodiments shown in FIG4 and FIG5 ;

[0066] The driving module 220 includes a thyristor Q4, a seventh resistor R7, a tenth resistor R10, and a first capacitor C1;

[0067] The test module 250 includes a test switch TEST1 in the embodiments shown in FIG. 2 and FIG. 4 ; the test module 250 includes a test switch TEST1 , an eighth resistor R8 , and a ninth resistor R9 in the embodiments shown in FIG. 3 and FIG. 5 ;

[0068] The LED indicating unit 260 includes a twelfth resistor R12, a thirteenth resistor R13 and a light emitting diode LED1;

[0069] The lightning protection unit 270 includes a first varistor ZR1;

[0070] The detection and protection device further includes a trip coil Lx, a first diode D1, a second diode D2, and a second varistor ZR2.

[0071] Specifically, the second current-carrying line 120 is connected to one end of the tripping 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 tripping 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 anode 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 transistor 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 transistor Q1; the fifth The other end of the resistor R5 is connected to one end of the fourth resistor R4 and the emitter of the second transistor 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 transistor Q2; the collector of the first transistor Q1 and the collector of the second transistor 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 cathode of the light-emitting diode LED1 are all connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the first current-carrying line 110.

[0072] For the first resistor R1, in the embodiments of Figures 2 and 4, one end of the first resistor R1 is also connected to the first end a, and the other end of the first resistor R1 is also connected to the fourth end d; in the embodiments of Figures 3 and 5, one end of the first resistor R1 is also connected to the first end a, and the other end of the first resistor R1 is also connected to the fifth end e.

[0073] For the fourth resistor R4, in the embodiments of Figures 2 and 4, one end of the fourth resistor R4 is also connected to the second end b, and the other end of the fourth resistor R4 is also connected to the fifth end e; in the embodiments of Figures 3 and 5, one end of the fourth resistor R4 is also connected to the second end b, and the other end of the fourth resistor R4 is also connected to the fourth end d.

[0074] Regarding the leakage detection unit 212, in the embodiments shown in FIG2 and FIG3, the positive electrode of the voltage stabilizing unit ZD1 is connected to the control electrode of the thyristor Q4, the negative electrode of the voltage stabilizing 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 end a, the second end b, the third end c, the fourth end d, the fifth end e, and the sixth end f; in the embodiments shown in FIG4 and FIG5, the base of the third transistor Q3 is connected to one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15, and the other end of the fourteenth resistor R14 is connected to any one of 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. The first end of the third transistor Q3 is connected to the connection point of 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 of the cathode of the thyristor Q4 and the anode of the first diode D1, the collector of the third transistor 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 transistor 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 end a, the second end b, the third end c, the fourth end d, the fifth end e, and the sixth end f.

[0075] For the test module 250, in the embodiments shown in Figures 2 and 4, the other end of the test switch TEST1 is connected to any one of 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; in the embodiments shown in Figures 3 and 5, 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 end of the eighth resistor R8 and the other end of the ninth resistor R9 are connected to any two of 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.

[0076] Next, the operation of the above-mentioned detection and protection device under various leakage and open circuit conditions will be described using the embodiment shown in FIG4 :

[0077] 1. When the leakage signal of the first current-carrying line 110 is transmitted to the first shielding conductor structure 130:

[0078] After the first shielding conductor structure 130 obtains the leakage signal, the third transistor Q3 is turned on, forming a conductive path of the first current-carrying line 110 - the first shielding conductor structure 130 - the third diode D3 - the third transistor Q3 - the sixteenth resistor R16 - the seventh resistor R7 - the second diode D2 - the tripping coil Lx - the second current-carrying line 120;

[0079] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0080] 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.

[0081] 2. When the leakage signal of the second current-carrying line 120 is transmitted to the second shielding conductor structure 140:

[0082] After the second shielding conductor structure 140 obtains the leakage signal, the third transistor Q3 is turned on, forming a conduction path of the second current-carrying line 120 - the second shielding conductor structure 140 - the third diode D3 - the third transistor Q3 - the sixteenth resistor R16 - the seventh resistor R7 - the first diode D1 - the first current-carrying line 110;

[0083] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0084] 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.

[0085] 3. When the portion of the first shielding conductor structure 130 between the first end a and the third end c is open:

[0086] The shorting 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 shorted. The two ends of the fourth resistor R4 are still shorted, and the fourth resistor R4 is shorted by the conductive path from the second end b to the third end c to the sixth end f to the fifth end e. It should be noted that the conductive path from the second end b to the third end c to the sixth end f to the fourth end d exists simultaneously.

[0087] A conductive path is formed: second current-carrying line 120 - tripping coil Lx - second resistor R2 - first resistor R1 - third resistor R3 - first diode D1 - first current-carrying line 110 ;

[0088] The first transistor Q1 is turned on, and the second transistor Q2 remains turned off; forming a conductive path of the second current-carrying line 120 - tripping coil Lx - second resistor R2 - first transistor Q1 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0089] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0090] 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.

[0091] 4. When the portion of the first shielding conductor structure 130 between the second end b and the third end c is open:

[0092] The shorting path between the second end b and the fifth end e is disconnected, and the two ends of the fourth resistor R4 are no longer shorted. The two ends of the first resistor R1 are still shorted, and the first resistor R1 is shorted by the conductive path from the first end a to the third end c to the sixth end f to the fourth end d. It should be noted that the conductive path from the first end a to the third end c to the sixth end f to the fifth end e exists simultaneously.

[0093] A conductive path is formed: second current-carrying line 120 - tripping coil Lx - fifth resistor R5 - fourth resistor R4 - sixth resistor R6 - first diode D1 - first current-carrying line 110 ;

[0094] The second transistor Q2 is turned on, and the first transistor Q1 remains turned off; forming a conductive path of the second current-carrying line 120 - tripping coil Lx - fifth resistor R5 - second transistor Q2 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0095] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0096] 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.

[0097] 5. When the connecting conductor between the third terminal c and the sixth terminal f is open:

[0098] 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 short-circuit path between the second end b and the fifth end e is disconnected, and the two ends of the fourth resistor R4 are no longer short-circuited;

[0099] Forming a conducting path of the second current-carrying line 120 - tripping coil Lx - second resistor R2 - first resistor R1 - third resistor R3 - first diode D1 - first current-carrying line 110, and forming a conducting path of the second current-carrying line 120 - tripping coil Lx - fifth resistor R5 - fourth resistor R4 - sixth resistor R6 - first diode D1 - first current-carrying line 110;

[0100] The first transistor Q1 and the second transistor Q2 are both turned on; forming a conducting path of the second current-carrying line 120 - the tripping coil Lx - the second resistor R2 - the first transistor Q1 - the tenth resistor R10 - the seventh resistor R7 - the first diode D1 - the first current-carrying line 110, and forming a conducting path of the second current-carrying line 120 - the tripping coil Lx - the fifth resistor R5 - the second transistor Q2 - the tenth resistor R10 - the seventh resistor R7 - the first diode D1 - the first current-carrying line 110;

[0101] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0102] 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.

[0103] 6. When the portion of the second shielding conductor structure 140 between the fourth end d and the sixth end f is open:

[0104] The shorting 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 shorted. The two ends of the fourth resistor R4 are still shorted, and the fourth resistor R4 is shorted by the conductive path from the second end b to the third end c to the sixth end f to the fifth end e. It should be noted that the conductive path from the first end a to the third end c to the sixth end f to the fifth end e exists simultaneously.

[0105] A conductive path is formed: second current-carrying line 120 - tripping coil Lx - second resistor R2 - first resistor R1 - third resistor R3 - first diode D1 - first current-carrying line 110 ;

[0106] The first transistor Q1 is turned on, and the second transistor Q2 remains turned off; forming a conductive path of the second current-carrying line 120 - tripping coil Lx - second resistor R2 - first transistor Q1 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0107] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0108] 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.

[0109] 7. When the portion of the second shielding conductor structure 140 between the fifth end e and the sixth end f is open:

[0110] The shorting path between the second end b and the fifth end e is disconnected, and the two ends of the fourth resistor R4 are no longer shorted. The two ends of the first resistor R1 are still shorted, and the first resistor R1 is shorted by the conductive path from the first end a to the third end c to the sixth end f to the fourth end d. It should be noted that the conductive path from the second end b to the third end c to the sixth end f to the fourth end d also exists.

[0111] A conductive path is formed: second current-carrying line 120 - tripping coil Lx - fifth resistor R5 - fourth resistor R4 - sixth resistor R6 - first diode D1 - first current-carrying line 110 ;

[0112] The second transistor Q2 is turned on, and the first transistor Q1 remains turned off; forming a conductive path of the second current-carrying line 120 - tripping coil Lx - fifth resistor R5 - second transistor Q2 - tenth resistor R10 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0113] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0114] 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.

[0115] 8. When the test switch TEST1 is pressed:

[0116] 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 :

[0117] After the first shielding conductor structure 130 or the second shielding conductor structure 140 obtains the leakage signal, the third transistor Q3 is turned on, forming a conductive path of the second current-carrying line 120 - tripping coil Lx - test switch TEST1 - first shielding conductor structure 130 / second shielding conductor structure 140 - third diode D3 - third transistor Q3 - sixteenth resistor R16 - seventh resistor R7 - first diode D1 - first current-carrying line 110;

[0118] The voltage of the control electrode of the thyristor Q4 increases. When the AC power reaches the negative half cycle, that is, the voltage level of the second current-carrying line 120 is greater than the voltage level of the first current-carrying line 110, the thyristor Q4 is turned on, forming a strong current path of the second current-carrying line 120 - tripping coil Lx - thyristor Q4 - first diode D1 - first current-carrying line 110.

[0119] 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.

[0120] Figure 6 is a schematic diagram of the layout of the first surface of a circuit board of an electrical connection device provided in an embodiment of the present application; Figure 7 is a schematic diagram of the layout of the second surface of a circuit board of an electrical connection device provided in an embodiment of the present application. Referring to Figures 6 and 7, in a circuit board of an electrical connection device provided in an embodiment of the present application, the circuit board located within the housing 400 includes a first surface 301 facing the plug conductor 410 and a second surface 302 facing away from the plug conductor 410. It is understood that the shape of the circuit board is not limited to the shapes shown in Figures 6 and 7, and may also be an elliptical, rectangular, polygonal, or irregular shape similar to those shown in Figures 6 and 7.

[0121] As described in Figures 2 to 5 above, the detection and protection device includes not only an open circuit detection unit 211, a leakage detection unit 212, a drive module 220, a trip module 230, and a test module 250 including a test switch TEST1, but also 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 trip module 230. Among them:

[0122] As shown in FIG6 , the trip module 230 is disposed in the middle area of ​​the first panel 301 ; current-carrying conductors 260 are disposed on both sides of the trip module 230 for contacting with the plug conductors 410 to obtain power;

[0123] As shown in FIG7 , the second board surface 302 is provided with a first area 310 located at the edge of the circuit board, and the open circuit detection unit 211 is provided in the first area 310 ;

[0124] As shown in Figure 6, the first board surface 301 is provided with a shielded conductor solder point 311 for welding and connecting the first shielded conductor structure 130 and / or the second shielded conductor structure 140 at a position corresponding to 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 arranged adjacent to the four shielded conductor solder points 311, the open circuit detection unit 211 can process the electrical signal obtained from the four shielded conductor solder points 311, and output a signal to feed back to the driving module 220. The electrical signal transmitted from the four shielded conductor solder points 311 does not need to be transmitted over long distances, the circuit routing is simpler, and the anti-interference ability is stronger.

[0125] As shown in FIG7 , the test switch TEST1 and the reset button RESET are disposed in the middle area of ​​the second board 302 ; the leakage detection unit 212 and the driving module 220 are disposed in the area of ​​the second board 302 adjacent to the test switch TEST1 and the reset button RESET.

[0126] According to the circuit board of the electrical connection device provided in the embodiment of the present application, by setting the first area 310 for connecting to the shielding conductor structure of the power line 100 at the edge of the circuit board, that is, the shielding conductor solder point 311 is located at the edge of the circuit board, so that the welding process between the first shielding conductor structure 130 and the second shielding conductor structure 140 and the circuit board is simpler and convenient for wiring; the open circuit detection unit 211 is located in the first area 310, so that the circuit routing between the shielding conductor solder point 311 and the open circuit detection unit 211 is shorter and has stronger 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 connections between the open circuit detection unit 211 and the first shielding conductor structure 130 and the second shielding conductor structure 140. The distance between the shielded conductor solder joint 311 and the open circuit detection unit 211 is shorter, which can simplify the circuit routing. The open circuit detection unit 211 processes the open circuit condition of the first shielded conductor structure 130 and the second shielded conductor structure 140 and outputs an open circuit fault signal to the driving module 220. There is no need to set up multiple long circuit lines connecting the first area 310 to the driving module 220. The circuit layout of this embodiment, based on the fact that the trip module 230, the test switch TEST1 and the reset button RESET occupy the main position of the circuit board, reasonably allocates areas to arrange the open circuit detection unit 211, the leakage detection unit 212 and the driving module 220 on the limited board space of the circuit board, which can not only simplify the routing and improve the anti-interference capability, but also minimize the size of the circuit board.

[0127] 7 , in the circuit board provided in some embodiments of the present application, the reset button RESET, the test switch TEST1 and the first area 310 are sequentially arranged along the longitudinal axis of the second board surface 302 .

[0128] It is understood that, taking the circuit board orientation shown in FIG7 as an example, the vertical direction is the length direction of the second board surface 302. The test switch TEST1 is arranged in the middle of the second board surface 302 in the vertical direction, the reset button RESET is arranged above the test switch TEST1, and the first area 310 is located below the test switch TEST1.

[0129] 7 , in the circuit board provided in some embodiments of the present application, the leakage detection unit 212 is located in the area to the left of the test switch TEST1, and the driver module 220 is located in the area to the left of the reset button RESET and adjacent to the leakage detection unit 212. The leakage detection unit 212 is in close proximity 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 shielded conductor structure 130 and the second shielded conductor structure 140 is shortened, making wiring more convenient. The driver module 220 is in close proximity to the leakage detection unit 212, so the path for the leakage fault signal output by the leakage detection unit 212 to be transmitted to the driver module 220 is shortened, making wiring more convenient.

[0130] It can be understood that since the test switch TEST1 and the reset button RESET are both located in the middle area in the vertical direction, the leakage detection unit 212 can also be set in the right area of ​​the test switch TEST1. Similarly, the driving module 220 is also correspondingly set in the right area of ​​the reset button RESET and adjacent to the leakage detection unit 212.

[0131] 6 , in the circuit boards provided in some embodiments of the present application, the current-carrying conductor 260 extends along the longitudinal axis of the first board surface 301 , the end of the current-carrying conductor 260 away from the shielding conductor solder joint 311 is a power contact end 261 for contacting the plug conductor 410 , and the end of the current-carrying conductor 260 close to the shielding conductor solder joint 311 is a power output solder joint 262 for welding the first current-carrying line 110 or the second current-carrying line 120 .

[0132] It is understood that the trip module 230 is located in the central area of ​​the first board surface 301, and the two current-carrying conductors 260 are located on either side of the trip module 230. This ensures that the forces on the two current-carrying conductors 260 are balanced when the trip module 230 is actuated to cause displacement or deformation. Furthermore, larger components such as the trip module 230 and the current-carrying conductors 260 are located on the first board surface 301 of the circuit board, while other smaller components of the detection and protection device that require electrical connection via the printed circuit board are located on the second board surface 302 of the circuit board. This allows for better routing and simplifies circuit wiring. Furthermore, the power output solder point 262 is located near the first area 310, eliminating the need for the first and second current-carrying wires 110, 120 to extend too far on the circuit board when soldered to the current-carrying conductors 260.

[0133] 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 and the plug conductor 410 are in contact with each other, so that the mains power supply can be obtained.

[0134] In the circuit boards provided in some embodiments of the present application, the first shielding conductor structure 130 includes a first end a close to the circuit board, a second end b away 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 away 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; referring to Figure 6, the first area 310 is provided with four shielding conductor solder points 311 for connecting to the first end a, the second end b, the fourth end d, and the fifth end e, respectively.

[0135] It will be appreciated 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, the first region 310 is provided with four shielded conductor solder joints 311 respectively connected to the first end a, the second end b, the fourth end d, and the fifth end e, as shown, for example, in FIG6 . After the first end a, the second end b, the fourth end d, and the fifth end e are connected to the four shielded conductor solder joints 311 of the first region 310, they are then electrically connected to the open circuit detection unit 211 via traces on the circuit board.

[0136] In the circuit boards provided in some other embodiments of the present application, the first region 310 is further provided with two shielding conductor solder joints 311 for connecting to the third end c and the sixth end f, respectively.

[0137] Since the third end c and the sixth end f need to be electrically connected, in order to ensure a 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 area 310 so that the third end c and the sixth end f can be connected to the circuit board and electrically connected through the circuit board.

[0138] 2 to 5 , in the circuit boards provided in some embodiments of the present application, 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 transistor Q1 and a first resistor R1 for providing a turn-on voltage to the first transistor Q1 ; the second switch unit 202 includes a second transistor Q2 and a fourth resistor R4 for providing a turn-on voltage to the second transistor Q2 . Furthermore, the first switch unit 201 also 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, the other end of the second resistor R2 is connected to one end of the first resistor R1 and the emitter of the first transistor Q1, the other end of the first resistor R1 is connected to the base of the first transistor 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 also 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, the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the emitter of the second transistor Q2, the other end of the fourth resistor R4 is connected to the base of the second transistor 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 collector of the first transistor Q1 and the collector of the second transistor 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 it can be indirectly connected to the second current-carrying line 120 via a trip coil Lx as shown in Figures 2 to 5. 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 it can be indirectly connected to the second current-carrying line 120 via a trip coil Lx as shown in 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 it can be indirectly connected to the first current-carrying line 110 via a first diode D1 as shown in Figures 2 to 5. 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 it can be indirectly connected to the first current-carrying line 110 via a first diode D1 as shown in Figures 2 to 5.

[0139] 7 , the first transistor Q1 , the second transistor 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 region 310 .

[0140] 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 large number of transistor components and resistor components, and the connection relationship is complex. Therefore, all components of the open circuit detection unit 211 are arranged in the first area 310, so that electrical connection with the shielding conductor solder joint 311 can be achieved through a shorter trace; concentrating the components contained in the open circuit detection unit 211 in one area can also help reduce the layout size required on the circuit board.

[0141] 4 and 5 , in the circuit board provided in some embodiments of the present application, the leakage detection unit 212 includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a third transistor 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 transistor Q3, the emitter of the third transistor 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, and the emitter of the third transistor Q3 is connected to any shielding conductor solder joint 311. The collector is connected to one end of a sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to the driver 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 shown in Figures 4 and 5. The fifteenth resistor R15 is connected to one end of the first current-carrying line 110, and can be directly connected to the first current-carrying line 110, or it can be indirectly connected to the first current-carrying line 110 via a first diode D1 as shown in Figures 4 and 5. Referring to Figure 7, the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16, and the third transistor Q3 are all arranged in the second area 320 on the second board 302, located to the left of the test switch TEST1.

[0142] 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 transistor device in combination with a plurality of resistor devices. The components included in the leakage detection unit 212 are concentrated in the second area 320 on the left side of the test switch TEST1, which is conducive to reducing the layout size required for the leakage detection unit 212 on the circuit board.

[0143] 2 and 3 , in the circuit board provided in some embodiments of the present application, the leakage detection unit 212 includes an eleventh resistor R11 and a voltage stabilizing unit ZD1, the positive electrode of the voltage stabilizing unit ZD1 is connected to the driving module 220, the negative electrode of the voltage stabilizing 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 point 311; the eleventh resistor R11 and the voltage stabilizing unit ZD1 are both arranged in the second area 320 on the second board surface 302, located on the left side of the test switch TEST1.

[0144] It can be understood that the leakage detection unit 212 detects the leakage of the first shielded conductor structure 130 and the second shielded conductor structure 140 by adopting the voltage stabilizing unit ZD1 in combination with the resistance element. The components included in the leakage detection unit 212 are concentrated in the second area 320 on the left side of the test switch TEST1, which is conducive to reducing the layout size required for the leakage detection unit 212 on the circuit board.

[0145] 2 to 5 , in the circuit boards provided in some embodiments of the present application, 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 also includes a trip coil Lx. The second current-carrying line 120 is connected to one end of the trip coil Lx, and 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, and the seventh resistor R7 are connected to one end of the first current-carrying line 110. They may be directly connected to the first current-carrying line 110 or indirectly connected to the first current-carrying line 110 via the first diode D1 as shown in Figures 4 and 5 . 7 , the thyristor Q4 , the seventh resistor R7 , the tenth resistor R10 , and the first capacitor C1 are all arranged in a third area 330 on the left side of the reset button RESET on the second board surface 302 .

[0146] 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 adopts thyristor devices, capacitors and multiple resistor devices, and the components contained in the driving module 220 are concentrated in the third area 330 to the left of the reset button RESET, which is conducive to reducing the layout size required for the driving module 220 on the circuit board.

[0147] In the circuit boards provided in some embodiments of the present application, 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 310 is 30mm±3mm, and the width dimension range is 8.5mm±10mm; the length dimension range of the arrangement area of ​​the leakage detection unit 212 on the second board surface 302 is 10mm±3mm, and the width dimension range is 8mm±3mm; the length dimension range of the arrangement area of ​​the driving module 220 on the second board surface 302 is 15mm±3mm, and the width dimension range is 10mm±3mm.

[0148] It is understandable that the detection and protection devices shown in Figures 2 to 5 require a large number of switch devices, diode devices, resistor devices, capacitor devices, etc. to detect leakage and open circuit conditions in the shielded conductor structure of the power line. The circuit board provided in the embodiment of the present application, based on the fact that the trip module 230, the test switch TEST1, and the reset button RESET occupy the main position of the circuit board, rationally allocates areas within the limited board space to arrange the open circuit detection unit 211, the leakage detection unit 212, and the driver module 220. This can not only simplify wiring and improve anti-interference capabilities, but also minimize the size of the circuit board.

[0149] 6 , in the circuit boards provided in some embodiments of the present application, 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 position of the first area 310 , and two shielding conductor solder joints 311 are respectively arranged on both sides of the first varistor ZR1 .

[0150] It can be understood that the first varistor ZR1 in the lightning protection unit 270 is relatively large in size, and is set in the middle area of ​​the first board surface 301 corresponding to the position of the first area 310, thereby dividing the four shielding conductor solder points 311 into twos, avoiding the four shielding conductor solder points 311 being set in a smaller area, which causes welding difficulties.

[0151] In addition, referring to Figure 6 , the second varistor ZR2 is located in the left area of ​​the trip module 230 on the first panel 301. Referring to Figure 7 , the freewheeling module of the detection and protection device, consisting of the first diode D1 and the second diode D2, is located in the right area of ​​the test module 250 on the second panel 302. Furthermore, referring to Figure 7 , a solder joint for the trip coil Lx may also be located below the test module 250 on the second panel 302.

[0152] It should be noted that in Figures 6 and 7 of the present application, the placement of components in each module can be interchanged, and Figures 6 and 7 only show one layout form.

[0153] According to the circuit board provided in some embodiments of the present application, the components in the open circuit detection unit 211, the leakage detection unit 212, the driving module 220 and the tripping module 230 are packaged using surface mount packaging or plug-in packaging.

[0154] According to the circuit boards provided in some embodiments of the present application, the circuit boards adopt a single-sided board, a double-sided board or a multi-layer board routing method.

[0155] According to the circuit boards provided in some embodiments of the present application, the circuit boards are processed by wave soldering, reflow soldering or manual methods.

[0156] The circuit board of the electrical connection device provided in some embodiments of the present application has at least the following beneficial effects: by arranging the first area for connecting to the shielding conductor structure of the power line at the edge of the circuit board, that is, the shielding conductor solder joint is located at the edge of the circuit board, so that the welding process between the first shielding conductor structure and the second shielding conductor structure and the circuit board is simpler and convenient for wiring; the open circuit detection unit is located in the first area, so that the circuit routing between the shielding conductor solder joint and the open circuit detection unit is shorter and has stronger anti-interference ability, especially when there is a need to perform segmented detection on the first shielding conductor structure and the second shielding conductor structure, the open circuit detection unit and the first shielding conductor structure and the second shielding conductor structure are connected. There will be multiple connection points in the structure, and the distance between the shielded conductor solder joint and the open circuit detection unit is shorter, which can make the circuit routing simpler; the open circuit detection unit processes the open circuit conditions of the first shielded conductor structure and the second shielded conductor structure and outputs an open circuit fault signal to the drive module, without the need to set up multiple long circuit lines connecting from the first area to the drive module; the circuit layout of this embodiment, based on the fact that the trip module, test switch and reset button occupy the main position of the circuit board, reasonably allocates areas to arrange the open circuit detection unit, leakage detection unit and drive module on the limited board space of the circuit board, which can not only simplify the routing and improve the anti-interference ability, but also minimize the size of the circuit board.

[0157] In addition, the second embodiment of the present application provides an electrical connection device, including a circuit board as described in the first 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 shell 400 that wraps the circuit board; the shell 400 is provided with a plug conductor 410 for connecting to a power supply.

[0158] According to the electrical connection device provided in some embodiments of the present application, a wire clip for clamping the power cord 100 is provided at the connection between the housing 400 and the power cord 100;

[0159] It is understandable that by providing a line clip to fix the power line 100 , it is possible to prevent the power line 100 from being easily dragged by external forces, thereby preventing the ports connected to the detection and protection device from falling off.

[0160] The first shielding conductor structure 130 includes a first end a close to the circuit board, a second end b away 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 away from the fourth end d, and a sixth end f located between the fourth end d and the fifth end e;

[0161] The third terminal c and the sixth terminal f are electrically connected in one of the following three situations:

[0162] Case 1: Solder connection at the line card;

[0163] Case 2: Welding connection inside the housing 400;

[0164] Case 3: Connecting to the shield conductor solder joint 311 to achieve electrical connection through the circuit board.

[0165] 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 actual conditions. For example, in case one, when it is set at the line card, the line card can clamp the welding part of the third end c and the sixth end f while clamping the power cord 100, so as to prevent the welding part from loosening and falling off easily; in case two, when it is set inside the shell 400, the welding connection space between the third end c and the sixth end f is larger and easy to operate; in case three, when it is connected to the shielding conductor solder point 311, the third end c and the sixth end f are welded to the circuit board together with the first end a, the second end b, the fourth end d and the fifth end e, 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, and the electrical connection between the third end c and the sixth end f through the circuit board can also be more reliable, and it is not easy to be disconnected.

[0166] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A circuit board for an electrical connection device, wherein: 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; as well as 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, wherein: 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, wherein: 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, wherein: 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 any one of claims 1 to 4, wherein: 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, wherein: 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 any one of claims 1 to 6, wherein: 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. 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, wherein: 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 any one of claims 2 to 8, wherein: 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.

10. The circuit board according to any one of claims 2 to 9, wherein: 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.

11. The circuit board according to any one of claims 2 to 10, wherein: 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.

12. The circuit board according to any one of claims 1 to 11, wherein: 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.

13. The circuit board according to any one of claims 1 to 12, wherein: 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.

14. The circuit board according to any one of claims 1 to 13, wherein: The circuit board adopts a single-sided board, a double-sided board or a multi-layer board routing method.

15. The circuit board according to any one of claims 1 to 14, wherein: The circuit board is processed by wave soldering, reflow soldering or manual processing.

16. An electrical connection device, comprising the circuit board according to any one of claims 1 to 15, a power cord, a detection and protection device arranged on the circuit board and connected to the power cord, and a shell wrapping the circuit board, wherein the shell is provided with a plug conductor for connecting to a power supply.

17. The electrical connection device according to claim 16, wherein: 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: Case 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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