Circuit breaker

Abstract

A circuit breaker comprises a shell and an electric leakage protection module, the electric leakage protection module comprises an electric leakage testing mechanism and a circuit board, the electric leakage testing mechanism comprises a testing button and an electric leakage testing loop, the testing button is in sliding fit with the shell, and the electric leakage testing loop is connected into a phase L-pole main circuit and an N-pole main circuit in the shell. The electric leakage test loop comprises a conductive elastic piece and a static contact piece which form a breakpoint, two electricity taking grooves are formed in the edge of the circuit board, the first electricity taking end of the conductive elastic piece and the second electricity taking end of the static contact piece are clamped in the two electricity taking grooves respectively and electrically connected with the circuit board, and the test button is connected with the conductive elastic piece. And the test button drives the movable contact part of the conductive elastic sheet to be close to or far away from the static contact part of the static contact sheet. According to the utility model, the conductive elastic sheet and the static contact sheet which form the breakpoints are respectively clamped in the clamping grooves at the edge of the circuit board, and the conductive elastic sheet and the static contact sheet are directly connected with the circuit board to take electricity, so that wires connected between the conductive elastic sheet and the circuit board and between the static contact sheet and the circuit board are omitted, and the number of the wires is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage apparatus, concretely relates to a circuit breaker. BACKGROUND

[0002] The circuit breaker is a common switch device, which is mainly used for infrequent opening and closing of power distribution lines, overload or short circuit protection of power distribution lines and equipment, and automatic circuit breaking when serious overload or short circuit fault of power distribution lines or equipment occurs.

[0003] At present, the circuit breaker usually has leakage protection function and leakage test function, and needs to be pressed regularly during use to detect whether the leakage protection function is normal. In the existing product, the leakage test circuit has one or more than two breakpoints, and the breakpoint usually has an elastic piece. The elastic piece needs to be connected with the circuit board through a wire. In particular, when the test resistance of the leakage test circuit is integrated in the circuit board, the test resistance and the breakpoint need to be connected through a wire, which causes too many power supply wires in the circuit breaker, occupies a large internal space, and the internal wiring is messy due to the easy bending and winding of the wire. SUMMARY

[0004] The utility model aims at overcoming at least one defect of the prior art, and provides a circuit breaker.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a circuit breaker, including shell and the leakage protection module who sets up in the shell, the leakage protection module includes leakage test mechanism and circuit board, the leakage test mechanism includes test button and leakage test circuit, the test button is slidably connected with the shell, the leakage test circuit is connected with one phase L pole main line and N pole main line in the shell, the leakage test circuit includes the conductive spring piece and static contact piece who form the breakpoint with interval, the edge of circuit board is equipped with two power supply grooves, the first power supply end of conductive spring piece and the second power supply end of static contact piece are respectively clamped in two power supply grooves and are electrically connected with circuit board, the test button is connected with conductive spring piece, and the movable contact part of conductive spring piece is driven by test button to approach or away from the static contact part of static contact piece.

[0007] Preferably, the shell is provided with a button hole, the test button is slidably arranged in the button hole, the conductive spring piece and the static contact piece are respectively arranged along opposite sides of the button hole, and the first power supply end and the second power supply end are spaced apart and bent in the same direction and respectively clamped in the two power supply grooves.

[0008] Preferably, the conductive spring is arranged along one side of the button hole, the movable contact part and the first power taking end are respectively bent and extended towards the other side of the button hole, the test button is connected with the movable contact part at one end of the button hole, and the first power taking end is clamped in a power taking groove at the other end of the button hole.

[0009] The other side of the button hole is provided with a mounting table, the mounting table corresponds to the movable contact part and the first power taking end, the fixed contact part is fixed along the surface of the mounting table, the movable contact part is opposite to the fixed contact part, and the second power taking end is opposite to the first power taking end and is clamped in another power taking groove.

[0010] Preferably, the fixed contact part comprises a conductive sheet, one end of the conductive sheet is obliquely extended to one side to form the fixed contact part, the surface of the fixed contact part is provided with at least one protruding contact point, the other end of the conductive sheet is bent and extended to one side to form the second power taking end, and the fixed contact part and the second power taking end are located on the same side of the conductive sheet.

[0011] Preferably, the conductive spring comprises a spring body, one end of the spring body is obliquely extended to one side to form the movable contact part, the end of the movable contact part is provided with a connecting part, the connecting part is connected with one end of the test button together with the movable contact part, the other end of the spring body is bent and extended to one side to form the first power taking end, and the movable contact part and the first power taking end are located on the same side of the spring body.

[0012] Preferably, the circuit board is connected with at least one power taking rod, one end of one of the power taking rods is connected with the second power taking end in the same power taking groove.

[0013] Preferably, the second power taking end takes power from the L pole main line through the connected power taking rod.

[0014] Preferably, the leakage test circuit further comprises at least one test resistance, the test resistance is arranged on the circuit board, and the first power taking end takes power from the N pole main line through the test resistance.

[0015] Preferably, the N pole main line is connected with an N pole contact mechanism, the N pole contact mechanism comprises an N pole movable contact and an N pole fixed contact which cooperate with each other, the N pole movable contact is rotatably assembled and connected with a power taking spring, and the power taking spring is electrically connected with the test resistance on the same conductive shaft arranged in the shell.

[0016] Preferably, the conductive shaft and the test resistance correspond to the same side of the circuit board, and one connecting end of the conductive shaft and the test resistance is adjacent.

[0017] The conductive spring and the static contact are directly connected with the circuit board to take electricity, and the conductive spring and the static contact are omitted from the conductive spring and the static contact and the circuit board.

[0018] In addition, the conductive spring and the static contact are arranged in the button hole, and the first electricity taking end and the second electricity taking end are bent in the same direction, especially, the mounting table is arranged in the button hole, the static contact is provided with the assembly position, the wiring is more neat, and too much space is avoided in the interior.

[0019] In addition, the second electricity taking end is connected with the electricity taking rod on the circuit board, and is connected with the same electricity taking slot, and electricity is taken from the L pole main line, the wiring is simple, and the number of conductive wires is reduced.

[0020] In addition, the test resistance and the electricity taking spring are connected on the same conductive shaft, so that the leakage test circuit can take electricity from the N pole moving contact, and the test resistance and the N pole main line are simplified. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the structure diagram of the leakage protection module in the circuit breaker of the utility model;

[0022] Figure 2 is the structure diagram of the leakage protection module and the N pole moving contact in the circuit breaker of the utility model (not containing the circuit board);

[0023] Figure 3 is the cooperation diagram of the conductive spring and the static contact in the utility model;

[0024] Figure 4 is the structure diagram of the conductive spring in the utility model;

[0025] Figure 5 is the side view of the conductive spring in the utility model;

[0026] Figure 6 is the structure diagram of the static contact in the utility model;

[0027] Figure 7 is the side view of the static contact in the utility model;

[0028] Figure 8 is the structure diagram of the circuit board and the test resistance in the utility model;

[0029] Label: 1 - housing, 10 - partition, 11 - button hole, 12 - mounting table, 2 - N pole moving contact, 21 - power spring, 3 - transformer, 4 - circuit board, 41 - power slot, 51 - indicator, 52 - release, 53 - push plate, 60 - test button, 61 - conductive spring, 611 - first power end, 612 - moving contact part, 613 - connecting part, 614 - limiting groove, 62 - static contact, 621 - second power end, 622 - static contact part, 623 - contact, 63 - test resistance, 631 - connecting end, 71 - L pole conductive plate, 72 - N pole conductive plate, 73 - power rod, 74 - conductive shaft, 8 - short circuit protection mechanism, 81 - electromagnetic coil, 811 - wiring end, 9 - wiring terminal. DETAILED DESCRIPTION

[0030] The specific embodiments of the circuit breaker of the utility model are further illustrated by the following examples combined with the drawings. The circuit breaker of the utility model is not limited to the description of the following examples.

[0031] The circuit breaker comprises a housing 1, at least one circuit breaker pole is arranged in the housing 1, the circuit breaker pole comprises a pair of wiring terminals 9, each pair of wiring terminals 9 is arranged at opposite ends of the housing 1, and each pair of wiring terminals 9 is connected with a phase main line, each phase main line is controlled to be turned on or turned off by a contact mechanism connected in series, each phase main line is an N pole main line or an L pole main line, and generally, at least one phase L pole main line and at least one phase N pole main line are arranged in the housing 1.

[0032] A leakage protection module is further arranged in the housing 1, the leakage protection module comprises a transformer 3, a circuit board 4, a release device and a leakage test mechanism, the transformer 3 is connected to the circuit board 4 and coupled to all the main lines in the circuit breaker, the release device is connected to the circuit board 4, when the transformer 3 collects leakage current existing in the main line and feeds back to the controller of the circuit board 4, the controller outputs a control signal to drive the release device to act; the leakage test mechanism comprises a test button 60 and a leakage test loop, the test button 60 is slidingly assembled on the housing 1, that is, the housing 1 is provided with a button hole 11, and the test button 60 is slidingly assembled in the button hole 11, the leakage test loop is connected to a phase L pole main line and a phase N pole main line, and the leakage test loop comprises a conductive spring 61 and a static contact 62 which are spaced apart to form a breakpoint, the test button 60 controls the on-off of the breakpoint, when the leakage test loop is connected, an analog leakage current is generated, the transformer 3 collects the analog leakage current existing in the main line and feeds back to the controller of the circuit board 4, and the controller outputs a control signal to drive the release device to act.

[0033] The improvement of the present application is that the edge of the circuit board 4 is provided with two power taking grooves 41, the first power taking end 611 of the conductive spring 61 and the second power taking end 621 of the static contact piece 62 are respectively clamped in the two power taking grooves 41 and electrically connected with the circuit board, the test button 60 is connected with the conductive spring 61, the movable contact part 612 of the conductive spring 61 is driven by the test button 60 to approach or move away from the static contact part 622 of the static contact piece, so as to turn on or turn off the leakage test circuit.

[0034] In this way, the conductive spring 61 and the static contact piece 62 which form the breakpoint are respectively clamped in the clamping grooves in the edge of the circuit board 4, the conductive spring 61 and the static contact piece 62 are directly connected with the circuit board 4 to take power, and the wires connected between the conductive spring 61, the static contact piece 62 and the circuit board 4 are omitted, so that the number of wires is reduced.

[0035] Specifically, the conductive spring 61 and the static contact piece 62 are respectively arranged along opposite sides of the button hole 11, the first power taking end 611 and the second power taking end 621 are spaced apart and respectively clamped in the two power taking grooves 41 after being bent in the same direction, preferably, an installation table 12 is arranged in the button hole 11, the static contact piece 62 can be fixedly assembled on the surface of the installation table 12, the installation table 12 provides an assembly position for the static contact piece 62, the conductive spring 61 is located on the opposite side of the installation table 12, the conductive spring 61 and the static contact piece 62 are arranged in the button hole 11 together, which has the advantage of neat wiring, in addition, the breakpoint formed by the conductive spring 61 and the static contact piece 62 is also located in the button hole 11, which is beneficial to the control of the breakpoint by the test button 60, and avoids occupying too much space inside.

[0036] Further, at least one power taking rod 73 is connected on the circuit board 4, one end of one of the power taking rods 73 is connected with the second power taking end 621 in the same power taking groove 41, and the second power taking end 621 takes power from the L pole main line through the connected power taking rod 73, which has the advantages of simple wiring and reducing the amount of wire used.

[0037] Further, the leakage test circuit further comprises at least one test resistor 63, the test resistor 63 is arranged on the circuit board 4, the first power taking end 611 of the conductive spring 61 is connected with the test resistor 63 through the circuit board 4, and the test resistor 63 takes power from the N pole main line, preferably, a conductive shaft 74 is arranged in the shell 1, the conductive shaft 74 is located between the test resistor 63 and the N pole contact mechanism connected to the N pole main line, the test resistor 63 and the N pole movable contact 2 of the N pole contact mechanism are electrically connected to the conductive shaft 74, so that the leakage test circuit can take power from the N pole main line.

[0038] In combination Figures 1-8 A specific embodiment of a circuit breaker is provided.

[0039] As Figure 1 ,2 As shown, the circuit breaker includes a housing 1, and a partition 10 is provided inside the housing 1. The partition 10 divides the space inside the housing 1 into two parallel assembly spaces. Each assembly space is provided with a circuit breaker pole. Each circuit breaker pole includes a pair of terminals 9. Each pair of terminals 9 is spaced apart at both ends of the housing 1. A main line is connected between each pair of terminals 9. Each pair of terminals 9 includes an input terminal and an output terminal. The input terminal is used to connect to the power supply terminal, and the output terminal is used to connect to the load. In this embodiment, one circuit breaker pole is the L pole, and the other circuit breaker pole is the N pole. The main line connected between the pair of terminals 9 in the L pole is the L pole main line, and the main line connected between the pair of terminals 9 in the N pole is the N pole main line.

[0040] In this embodiment, the structure of the L and N poles can adopt existing technology. Specifically, the L pole includes an operating mechanism and an L pole contact mechanism. The operating mechanism is rotatably mounted within the housing 1. The L pole contact mechanism includes a cooperating L pole moving contact and an L pole stationary contact. The L pole moving contact is connected to the operating mechanism, which drives the L pole moving contact to contact or separate from the L pole stationary contact, thereby controlling the connection and disconnection of the L pole main circuit. The N pole at least includes an N pole contact mechanism for controlling the connection and disconnection of the N pole main circuit. The N pole contact mechanism includes a cooperating N pole moving contact 2 and an N pole stationary contact 2. The N-pole moving contact 2 is rotatably mounted inside the housing 1. The N-pole moving contact 2 is provided with a spring hole, and a power-taking spring 21 is connected to the spring hole. The power-taking spring 21 is connected to a conductive shaft 74 located inside the housing 1. The N-pole moving contact 2 can be driven by the L-pole operating mechanism or the L-pole moving contact to swing open and close. The power-taking spring 21 can generate elastic deformation when the N-pole moving contact 2 swings open and close, and the power-taking spring 21 provides the closing force for the N-pole moving contact 2. The operating mechanism, the L-pole contact mechanism and the N-pole contact mechanism can adopt existing structures.

[0041] Additionally, a protection mechanism that cooperates with the operating mechanism can also be configured inside the housing 1. In this embodiment, the protection mechanism is configured in the L pole. The protection mechanism includes a short-circuit protection mechanism 8 and / or an overload protection mechanism. When a short-circuit fault occurs in the main line, the short-circuit protection mechanism 8 triggers the operating mechanism to trip, thereby causing the circuit breaker to trip and disconnect the power. In this embodiment, such as Figure 1 As shown, the short-circuit protection mechanism 8 is an electromagnetic trip unit 52. The electromagnetic coil 81 of the short-circuit protection mechanism 8 is connected to the L pole main line. When an overload fault occurs in the main line, the overload protection mechanism triggers the operating mechanism to trip, thereby causing the circuit breaker to trip and disconnect the power.

[0042] In this embodiment, a leakage protection module is also provided inside the outer casing 1, such as... Figures 1-3As shown, the leakage protection module and the N pole are arranged in the same assembly space, the leakage protection module comprises a mutual inductor 3, a circuit board 4, a tripping device and a leakage test mechanism, the mutual inductor 3, the circuit board 4 and the tripping device can adopt the prior art, the mutual inductor 3 is arranged on the side close to the outgoing terminal, the mutual inductor 3 is usually corresponding to the L pole short circuit protection mechanism 8, the mutual inductor 3 is connected to the circuit board 4 and coupled to the L pole main line and the N pole main line, the mutual inductor 3 can feed back the collected leakage current to the controller of the circuit board 4, and the controller outputs a signal to drive the connected tripping device to act, the circuit board 4 is connected to the L pole main line and the N pole main line, preferably, the circuit board 4 takes power from the load side of the L pole main line and the N pole main line, and part of the circuit board 4 is arranged in a stacked manner with one end face of the mutual inductor 3, in this embodiment, the tripping device usually comprises a tripping device 52, a push plate 53 and an indicating piece 51, wherein the tripping device 52 is connected to the circuit board 4, the push plate 53 is rotatably arranged on one side of the moving iron core of the tripping device 52 and is used to trigger the L pole operating mechanism to trip, the push plate 53 is in limiting cooperation with the indicating piece 51, and the indicating piece 51 is slidably arranged in an indicating hole formed in the shell 1, when the tripping device 52 is driven to act by the controller, the moving iron core drives the push plate 53 to rotate and triggers the L pole operating mechanism to trip, after the push plate 53 and the indicating piece 51 are out of limiting cooperation, the indicating piece 51 is ejected from the indicating hole.

[0043] As shown in the figure, Figures 1-7 The leakage test mechanism comprises a test button 60 and a leakage test circuit, the test button 60 can adopt the prior art, the test button 60 is slidably arranged in a button hole 11 formed in the shell 1, the leakage test circuit takes power from the L pole main line and the N pole main line, the leakage test circuit comprises a conductive spring 61 and a static contact 62 which are spaced apart to form a break point, Figures 1-3 In this embodiment, the conductive spring 61 and the static contact 62 are arranged on opposite sides of the button hole 11 respectively, the circuit board 4 is provided with two power taking grooves 41 corresponding to the edges of the button hole 11, a first power taking end 611 of the conductive spring 61 and a second power taking end 621 of the static contact 62 are respectively clamped in the two power taking grooves 41, the test button 60 and the conductive spring 61 are located on the same side of the button hole 11, the test button 60 is connected with the conductive spring 61, and the moving contact part 612 of the conductive spring 61 is driven by the test button 60 to approach or move away from the static contact part 622 of the static contact 62, so as to turn on or turn off the leakage test circuit.

[0044] In this embodiment, one side wall of the button hole 11 is provided with a mounting table 12, Figures 1-3In the embodiment, the mounting platform 12 is in the shape of a rectangular protrusion as a whole, and the side of the mounting platform 12 facing the button hole 11 is an inclined slope. The static contact piece 62 is fixedly arranged along the surface of the mounting platform 12, and the static contact portion 622 is fixedly attached to the inclined slope of the mounting platform 12. The second power taking end 621 of the static contact piece 62 is arranged along the side of the mounting platform 12 opposite to the inclined slope. The dynamic contact portion 612 and the first power taking end 611 of the conductive spring piece 61 are respectively bent and extended towards the side of the button hole 11 opposite to the mounting platform 12. That is, the dynamic contact portion 612 and the first power taking end 611 are respectively bent and extended towards the side where the mounting platform 12 is arranged. The dynamic contact portion 612 is extended in the inclined direction, so that the dynamic contact portion 612 and the static contact portion 622 are spaced apart from each other in the button hole 11. The test button 60 is connected to the side of the dynamic contact portion 612 opposite to the static contact portion 622. When the test button 60 is pressed, the dynamic contact portion 612 is elastically deformed, so that the dynamic contact portion 612 is in contact with the static contact portion 622, thereby connecting the leakage test circuit. The first power taking end 611 of the conductive spring piece 61 is bent and extended towards the side of the button hole 11 opposite to the mounting platform 12. The first power taking end 611 and the second power taking end 621 are kept spaced apart from each other and correspondingly clamped into the other power taking groove 41 on the circuit board 4. The conductive spring piece 61 and the static contact piece 62 are respectively clamped and take power from the two power taking grooves 41, thereby reducing the amount of wires used.

[0045] In combination Figures 1-5 The conductive spring piece 61 applied in the embodiment includes a plate-shaped spring body. One end of the spring body is inclined and extended towards one side to form the dynamic contact portion 612. The end of the dynamic contact portion 612 is provided with a connecting portion 613. Figure 3 In the embodiment, the connecting portion 613 is connected with the dynamic contact portion 612 and one end of the test button 60, so as to further enhance the stability of the test button 60 and the conductive spring piece 61. The other end of the spring body is bent and extended towards one side to form the first power taking end 611. The dynamic contact portion 612 and the first power taking end 611 are located on the same side of the spring body, so that the conductive spring piece 61 is in the shape of a Chinese character “ ” as a whole. When the conductive spring piece 61 is arranged in the button hole 11, the middle part of the conductive spring piece 61 is attached to the side wall of the button hole 11. The dynamic contact portion 612 and the first power taking end 611 of the conductive spring piece 61 are arranged outside the static contact piece 62. In addition, a limiting groove 614 can be formed in the middle part of the conductive spring piece 61. The limiting groove 614 is clamped with the limiting boss on the shell 1 or the partition plate 10, so as to limit the conductive spring piece 61.

[0046] In combination Figures 1-3, 6 and 7 provide a static contact piece 62 structure of the embodiment, the static contact piece 62 includes a plate-shaped conductive piece, one end of the conductive piece extends to one side to form a static contact part 622, the surface of the static contact part 622 is provided with at least one contact point 623, which is beneficial to ensure the on-site cooperation of the dynamic contact part 612 and the static contact part 622, the other end of the conductive piece is bent to one side to form a second power taking end 621, and the static contact part 622 and the second power taking end 621 are located on the same side of the conductive piece, so that the static contact piece 62 as a whole is in the shape of a Chinese character “fang”, when the static contact piece 62 is arranged on the mounting table 12, the static contact piece 62 is arranged along the three surfaces of the mounting table 12, wherein the static contact part 622 is fixed on the inclined slope of the mounting table 12.

[0047] As shown in Figure 2 , 8 , at least one test resistance 63 is further connected in the leakage test circuit, the test resistance 63 is arranged on the circuit board 4, generally, two connecting ends 631 of the test resistance 63 are inserted into the jack of the circuit board 4, in the embodiment, the first power taking end 611 takes power from the N-pole main line through the test button 60, the second power taking end 621 takes power from the L-pole main line, a conductive shaft 74 is arranged in the shell 1, the conductive shaft 74 is on the same side of the circuit board 4 corresponding to the test resistance 63, and the conductive shaft 74 is adjacent to one connecting end 631 of the test resistance 63, the power taking spring 21 connected to the N-pole dynamic contact 2 is electrically connected to the same conductive shaft 74, thereby realizing N-pole power taking of the leakage test circuit.

[0048] As shown in Figure 1 , 2 , the circuit board 4 is connected with at least one power taking rod 73, one end of one of the power taking rods 73 is connected with the second power taking end 621 in the same power taking groove 41, the conductive rod connected with the second power taking end 621 is connected to the L-pole main line, so that the second power taking end 621 can take power from the L-pole main line, thus having the advantage of simple wiring, in the embodiment, two power taking rods 73 are connected on the circuit board 4, the two power taking rods 73 are respectively connected to the L-pole main line and the N-pole main line for power taking, Figure 1 , 2 , the two power taking rods 73 are correspondingly arranged on the same side of the circuit board 4, and the test resistance 63 and the power taking rod 73 are arranged on the front and back sides of the circuit board 4 respectively, the middle part of each power taking rod 73 can be bent at least once according to actual needs.

[0049] Further, the circuit board 4 is connected to the load side of the L and N main lines through two power taking rods 73, in the embodiment, a conductive plate is connected in series in each phase main line, the conductive plate and the circuit board 4 are at least partially laminated on the same end surface of the mutual inductor 3, each conductive plate is connected with the adjacent terminal 9, and the two power taking rods 73 are connected with the two conductive plates connected to the N main line, preferably, one end of each conductive plate is provided with a clamping groove for clamping the power taking rod 73, and each power taking rod 73 is clamped in a corresponding clamping groove, so that the wiring is simplified and the assembly is facilitated.

[0050] In the embodiment, each conductive plate is connected to the adjacent outgoing terminal, the conductive plate connected to the L main line is an L conductive plate 71, and the conductive plate connected to the N main line is an N conductive plate 72, as shown in Figure 1 、 2 The L conductive plate 71 is in the form of a strip plate, the middle part of the plate body of the L conductive plate 71 is bent, the two ends of the L conductive plate 71 are arranged at an angle on the same plane, one end of the L conductive plate 71 is provided with a clamping groove, the other end of the L conductive plate 71 is laminated on the mutual inductor 3, and the other end of the L conductive plate 71 is provided with a connecting groove, in the embodiment, the L conductive plate 71 is connected in series with the electromagnetic coil 81 of the short-circuit protection mechanism 8, one terminal 811 of the electromagnetic coil 81 is electrically connected with the L contact mechanism, and the other terminal 811 passes through the center hole of the mutual inductor 3 and is connected with the L conductive plate 71, preferably, the other terminal 811 of the electromagnetic coil 81 is clamped in the connecting groove of the L conductive plate 71 after passing through the center hole of the mutual inductor 3, and the hole diameter of the connecting groove is matched with the terminal 811 of the electromagnetic coil 81, as shown in Figure 1 、 2 The middle part of the plate body of the N conductive plate 72 is bent, the two ends of the N conductive plate 72 extend on two planes respectively, one end of the N conductive plate 72 is provided with a clamping groove and is laminated on the mutual inductor 3, and the other end of the N conductive plate 72 is connected with the terminal 9 adjacent to the mutual inductor 3.

[0051] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in use, and are only for the convenience of description, and cannot be understood as indicating that the devices or elements referred to must have a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0052] The above is further detailed description of the utility model in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the utility model to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all of them shall be deemed as belonging to the protection scope of the utility model.

Claims

1. A circuit breaker, comprising a housing (1) and a leakage current protection module disposed within the housing (1), the leakage current protection module comprising a leakage current testing mechanism and a circuit board (4), the leakage current testing mechanism comprising a test button (60) and a leakage current testing circuit, the test button (60) being slidably engaged with the housing (1), the leakage current testing circuit being connected to a phase L-pole main line and a phase N-pole main line within the housing (1), the leakage current testing circuit comprising a conductive spring (61) spaced apart to form a break and a stationary contact (62), characterized in that: The edge of the circuit board (4) is provided with two power taking grooves (41), the first power taking end (611) of the conductive elastic sheet (61) and the second power taking end (621) of the static contact sheet (62) are respectively clamped in the two power taking grooves (41) and are electrically connected with the circuit board (4), the test button (60) is connected with the conductive elastic sheet (61), and the moving contact part (612) of the conductive elastic sheet (61) is driven by the test button (60) to approach or move away from the static contact part (622) of the static contact sheet (62).

2. The circuit breaker of claim 1, wherein: The shell (1) is provided with a button hole (11), the test button (60) is slidingly arranged in the button hole (11), the conductive elastic sheet (61) and the static contact sheet (62) are respectively arranged along opposite sides of the button hole (11), and the first power taking end (611) and the second power taking end (621) are spaced apart and are respectively clamped in the two power taking grooves (41) after being bent in the same direction.

3. The circuit breaker of claim 2, wherein: The conductive elastic sheet (61) is arranged along one side of the button hole (11), the moving contact part (612) and the first power taking end (611) are respectively bent and extended towards the other side of the button hole (11), the test button (60) is connected with the moving contact part (612) at one end of the button hole (11), and the first power taking end (611) is clamped in one power taking groove (41) at the other end of the button hole (11) away from the test button (60), The other side of the button hole (11) is provided with a mounting table (12), the mounting table (12) corresponds to the moving contact part (612) and the first power taking end (611), the static contact sheet (62) is fixed along the surface of the mounting table (12), the static contact part (622) is spaced apart from the moving contact part (612), and the second power taking end (621) is spaced apart from the first power taking end (611) and is clamped in the other power taking groove (41).

4. The circuit breaker of claim 1, wherein: The static contact sheet (62) comprises a conductive sheet, one end of the conductive sheet is inclined and extended to one side to form the static contact part (622), the surface of the static contact part (622) is provided with at least one protruding contact point (623), the other end of the conductive sheet is bent and extended to one side to form the second power taking end (621), and the static contact part (622) and the second power taking end (621) are located on the same side of the conductive sheet.

5. The circuit breaker of claim 1, wherein: The conductive elastic sheet (61) comprises an elastic sheet body, one end of the elastic sheet body is inclined and extended to one side to form the moving contact part (612), the tail end of the moving contact part (612) is provided with a connecting part (613), the connecting part (613) and the moving contact part (612) are connected with one end of the test button (60) together, the other end of the elastic sheet body is bent and extended to one side to form the first power taking end (611), and the moving contact part (612) and the first power taking end (611) are located on the same side of the elastic sheet body.

6. The circuit breaker of claim 1, wherein: The circuit board (4) is connected with at least one power taking rod (73), and one end of one of the power taking rods (73) is connected with the second power taking end (621) in the same power taking groove (41).

7. The circuit breaker of claim 6, wherein: The second power taking end (621) takes power from the L pole main line through the connected power taking rod (73).

8. The circuit breaker of any one of claims 1-7, wherein: The leakage test circuit further comprises at least one test resistor (63) arranged on the circuit board (4), and the first power taking end (611) takes power from the N-pole main line through the test resistor (63).

9. The circuit breaker of claim 8, wherein: The N-pole main line is connected with an N-pole contact mechanism, which comprises an N-pole movable contact (2) and an N-pole static contact matched with each other, and the N-pole movable contact (2) is rotatably assembled and connected with a power taking spring (21), and the power taking spring (21) is electrically connected with the test resistor (63) on the same conductive shaft (74) arranged in the shell (1).

10. The circuit breaker of claim 9, wherein: The conductive shaft (74) and the test resistor (63) are on the same side of the circuit board (4), and the conductive shaft (74) is adjacent to one connecting end (631) of the test resistor (63).

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