Leakage circuit breaker

Abstract

The present application discloses a leakage circuit breaker, comprising a partition and a test circuit mounted on the partition, a first terminal, a second terminal, and a test button; the first terminal and the second terminal are respectively one and the other of the live wire input terminal and the neutral wire output terminal, or respectively one and the other of the neutral wire input terminal and the live wire output terminal; the test circuit comprises a first circuit and a second circuit, the first circuit is electrically connected to the first terminal, and the second circuit is electrically connected to the second terminal, and under normal conditions, the first circuit and the second circuit are disconnected, and under a leakage test state, the test button pressed activates at least a portion of the second circuit, so that the first circuit and the second circuit are connected. In the leakage circuit breaker disclosed in the present application, the test circuit draws power through the input terminal of one of the live wire and the neutral wire and the output terminal of the other, so that the normal operation of the transformer in the leakage test state can be ensured without passing through the transformer, thereby reducing the difficulty of circuit assembly.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a leakage circuit breaker. Background Art

[0002] Leakage current circuit breakers (RCBs), as crucial protective devices in power supply lines, are widely used in industrial, commercial, and residential settings. They rapidly activate in the event of an electric shock or when the leakage current in a circuit exceeds a set value, automatically shutting off power in a fraction of a second. During the life of a RCB, internal connections and electronic components may malfunction, rendering the leakage protection function ineffective. Therefore, RCBs are often equipped with a test circuit to verify proper functioning.

[0003] The interior of a leakage circuit breaker in related art is typically divided into two independent compartments by a partition. One compartment houses the neutral and live terminals, while the other houses the live and live terminals. The leakage circuit breaker's test circuit typically draws power through the neutral and live terminals. When powered through the neutral and live terminals, the sum of the current vectors of the two main conductors passing through the transformer during the leakage test is zero. To ensure that the transformer can trigger the mechanism to disconnect the circuit during the leakage test, the test circuit must also pass through the transformer.

[0004] However, when the test loop passes through the transformer, the number of wires passing through the transformer will be large, and the assembly line near the transformer will be complicated. Summary of the Invention

[0005] In view of this, the present application provides a leakage circuit breaker, the test circuit of which does not need to pass through a transformer, and the circuit assembly is simpler.

[0006] This application specifically adopts the following technical solutions:

[0007] An embodiment of the present application provides a leakage circuit breaker, the leakage circuit breaker comprising a partition, a test circuit, a first terminal, a second terminal and a test button;

[0008] The test circuit, the first terminal, the second terminal and the test button are all mounted on the partition;

[0009] The first terminal and the second terminal are respectively one of the live wire input terminal and the neutral wire output terminal, or respectively one of the neutral wire input terminal and the live wire output terminal;

[0010] The test circuit includes a first circuit and a second circuit, the first circuit is electrically connected to the first terminal, and the second circuit is electrically connected to the second terminal, wherein the first circuit and the second circuit are disconnected under normal circumstances, and a test button pressed in the leakage test state actuates at least a part of the second circuit, so that the first circuit and the second circuit are connected.

[0011] Optionally, the second circuit includes a test resistor, a first conductive member, and a second conductive member electrically connected in sequence;

[0012] The test resistor is mounted on the first side of the partition, and one end of the test resistor away from the first conductive member is electrically connected to the second terminal;

[0013] The second conductive member is mounted on a second side of the partition, the second side being opposite to the first side, and the second conductive member is adapted to move when the test button is actuated.

[0014] Optionally, the second conductive member includes a fixing portion and a conductive arm, the second conductive member is mounted on the partition through the fixing portion, and the conductive arm is connected to the fixing portion and can rotate with the fixing portion as the rotation center;

[0015] The test button is connected to or abuts against the conductive arm when actuated.

[0016] Optionally, the second conductive member is an elastic member, and the test button is located in the rebound direction of the conductive arm of the second conductive member.

[0017] Optionally, the bottom of the test button has a groove opening toward the conductive arm;

[0018] A portion of the conductive arm is located in the groove.

[0019] Optionally, the second side of the partition has a fixing column;

[0020] The second conductive member is a torsion spring, wherein the fixing portion includes a spring coil and a first spring arm of the torsion spring, wherein the spring coil is sleeved on the fixing column, and the first spring arm is against or connected to the partition; the conductive arm is the second spring arm of the torsion spring.

[0021] Optionally, a via hole is provided on the partition, and the via hole passes through the partition in the thickness direction;

[0022] The first conductive member includes a first end, a middle portion, and a second end connected in sequence;

[0023] A first receiving groove is formed on the first side of the partition, and the through hole is adjacent to the fixing column; the first end of the first conductive member is electrically connected to the test resistor, the middle portion is located in the first receiving groove, the second end passes through the through hole, and the portion of the second end extending from the through hole contacts the inner wall of the spring coil.

[0024] Optionally, the first end of the first conductive member is elastic, and the test resistor is located in the rebound direction of the first end and abuts against the first end.

[0025] Optionally, the first circuit includes a moving contact and a soft wire, and the moving contact is electrically connected to the first terminal through the soft wire.

[0026] Optionally, the movable contact has a conductive column, and the conductive column extends away from the partition;

[0027] In which, the conductive column is configured so that: in the open state, the second circuit cannot contact the conductive column when the test button is pressed, so that the first circuit and the second circuit cannot be connected; in the closed state, the second circuit can contact the conductive column when the test button is pressed, so that the first circuit and the second circuit can be connected.

[0028] In the leakage circuit breaker provided in the embodiments of the present application, the test circuit draws power through the live wire input terminal and the neutral wire output terminal, or alternatively, through the neutral wire input terminal and the live wire output terminal. This power-drawing method ensures that the sum of the current vectors passing through the transformer's two main conductors during the leakage test is non-zero, thereby meeting the transformer's operational requirements and enabling the transformer to trigger its mechanism in a timely manner to disconnect the circuit during the test. In other words, in the leakage circuit breaker provided in the embodiments of the present application, the test circuit does not need to pass through the transformer, resulting in a simpler circuit assembly method. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic structural diagram of a leakage circuit breaker provided in an embodiment of the present application;

[0031] Figure 2 This is a structural diagram of a leakage circuit breaker on the second side of the partition provided by an embodiment of the present application;

[0032] Figure 3 This is a schematic structural diagram of a leakage circuit breaker on a first side of a partition provided by an embodiment of the present application;

[0033] Figure 4 This is a first structural schematic diagram of a second conductive member provided in an embodiment of the present application;

[0034] Figure 5 This is a schematic diagram of an assembly of a second conductive member provided in an embodiment of the present application;

[0035] Figure 6 This is a schematic diagram of an assembly of a test button and a second conductive member provided in an embodiment of the present application;

[0036] Figure 7 This is a second structural schematic diagram of a second conductive member provided in an embodiment of the present application;

[0037] Figure 8 This is a schematic diagram of an assembly of a first conductive member provided in an embodiment of the present application;

[0038] Figure 9 It is a structural schematic diagram of a fixed column provided in an embodiment of the present application;

[0039] Figure 10 This is a schematic structural diagram of a first conductive member provided in an embodiment of the present application;

[0040] Figure 11 This is a schematic structural diagram of the leakage circuit breaker on the second side of the partition in the open state provided by an embodiment of the present application;

[0041] Figure 12 This is a schematic structural diagram of the leakage circuit breaker on the second side of the partition in the closed state provided by an embodiment of the present application.

[0042] Reference numerals:

[0043] 1. Partition plate; 11. Through hole; 12. First receiving groove; 13. Fixing column;

[0044] 2. Test circuit;

[0045] 21. First circuit; 211. Moving contact; 2111. Conductive column; 212. Flexible wire;

[0046] 22. Second circuit;

[0047] 221. Test resistance;

[0048] 222, first conductive member; 2221, first end; 2222, middle portion; 2223, second end;

[0049] 223, second conductive member; 2231, fixing portion; 2232, conductive arm; 2233, spring coil; 2234, first spring arm;

[0050] 3. First terminal; 4. Second terminal;

[0051] 5. Test button; 51. Groove;

[0052] 6. Base; 7. Cover;

[0053] 100, first space; 200, second space.

[0054] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] The embodiment of the present application provides a leakage circuit breaker, such as Figure 1 As shown, the leakage circuit breaker may include a housing, and a handle operating system, a mechanism system, a thermal system, a contact system, an electromagnetic system, an arc extinguishing system, a wiring system, etc. installed on the housing.

[0057] The housing may include a base 6, a cover 7 and at least one partition 1, and the at least one partition 1 can divide the interior of the housing into a plurality of spaces. Figure 1 An exemplary structure of a leakage circuit breaker having a partition 1 is provided, wherein a first space 100 is formed between the partition 1 and the base 6, and a second space 200 is formed between the partition 1 and the cover 7; wherein one of the first space 100 and the second space 200 is installed with a live wire wiring system, and the other is installed with a neutral wire wiring system.

[0058] In the leakage circuit breaker provided in the embodiment of the present application, Figure 1As shown, the leakage circuit breaker may further include a test circuit 2, a first terminal 3, a second terminal 4 and a test button 5, wherein the test circuit 2, the first terminal 3, the second terminal 4 and the test button 5 are all mounted on the partition 1; the first terminal 3 and the second terminal 4 are respectively one and the other of the live wire input terminal and the neutral wire output terminal, or respectively one and the other of the neutral wire input terminal and the live wire output terminal; the test circuit 2 includes a first circuit 21 and a second circuit 22, the first circuit 21 is electrically connected to the first terminal 3, and the second circuit 22 is electrically connected to the second terminal 4, wherein the first circuit 21 and the second circuit 22 are disconnected under normal circumstances, and the test button 5 pressed in the leakage test state actuates at least a part of the second circuit 22, so that the first circuit 21 and the second circuit 22 are connected.

[0059] In an embodiment of the present application, the live wire connection system of the leakage circuit breaker includes a live wire input terminal and a live wire output terminal, and the neutral wire connection system includes a neutral wire input terminal and a neutral wire output terminal; by connecting the live wire input terminal to the live wire of the power supply line, connecting the live wire output terminal to the live wire of the power supply line, connecting the neutral wire input terminal to the neutral wire of the power supply line, and connecting the neutral wire output terminal to the neutral wire of the power supply line, the leakage circuit breaker is installed between the power supply line and the power supply line. When the operating handle operating system actuates the moving contact 211 and the static contact in the contact 211 system, the neutral wire of the power supply circuit is electrically connected to the neutral wire of the power consumption circuit, and the live wire of the power supply circuit is electrically connected to the live wire of the power consumption circuit, thereby realizing the conduction of the circuit; when the circuit needs to be disconnected or the circuit is short-circuited and overloaded, under the action of the electromagnetic system and the handle operating system and other systems, the moving contact 211 and the static contact are separated, the neutral wire of the power supply circuit is electrically disconnected from the neutral wire of the power consumption circuit, and the live wire of the power supply circuit is electrically disconnected from the live wire of the power consumption circuit, thereby realizing the circuit breaking.

[0060] Test circuit 2 is used to test the proper function of the residual current circuit breaker (RCB), specifically to determine whether it can promptly disconnect the circuit in the event of a short circuit or overload. The first circuit 21 and second circuit 22 of test circuit 2 are connected to one of the neutral and live wires, respectively. When the first circuit 21 and second circuit 22 are connected, the neutral and live wires are connected, resulting in a short circuit. Therefore, under normal conditions, the first circuit 21 and second circuit 22 are disconnected. Only in the test state, pressing the test button 5 activates the connection between the first circuit 21 and second circuit 22, simulating a short circuit.

[0061] In the leakage circuit breaker provided in the embodiments of the present application, the test circuit draws power through the live wire input terminal and the neutral wire output terminal, or alternatively, through the neutral wire input terminal and the live wire output terminal. This power-drawing method ensures that the sum of the current vectors passing through the transformer's two main conductors during the leakage test is non-zero, thereby meeting the transformer's operational requirements. Specifically, during the test, the transformer generates a signal that is transmitted to the PCBA, thereby driving the tripper rod in the mechanism system to move, triggering the mechanism to trip and thereby disconnecting the circuit. Therefore, this power-drawing method eliminates the need for test circuit 2 to pass through the transformer, making assembly simpler.

[0062] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the second circuit 22 includes a test resistor 221, a first conductive member 222 and a second conductive member 223 electrically connected in sequence; the test resistor 221 is installed on the first side of the partition 1, and the end of the test resistor 221 away from the first conductive member 222 is electrically connected to the second terminal 4; the second conductive member 223 is installed on the second side of the partition 1, the second side is opposite to the first side, and the second conductive member 223 is suitable for moving when the test button 5 is actuated.

[0063] Optionally, the test resistor 221 can be a plug-in resistor. A plug-in resistor is a current limiting component, generally having two pins and a fixed resistance value. After the plug-in resistor is connected to the circuit, the current passing through the branch connected to the plug-in resistor can be limited. Figure 3 As shown, one pin of the plug-in resistor is electrically connected to the second terminal 4, and the other pin is electrically connected to the first conductive member 222. Of course, other types of test resistors 221, such as chip resistors, can also be selected according to actual needs.

[0064] The first conductive member 222 is a conductive element that transmits current. The two ends of the first conductive member 222 are electrically connected to the test resistor 221 and the second conductive member 223, respectively. Since the test resistor 221 and the second conductive member 223 are located on opposite sides of the partition 1, the first conductive member 222 also needs to pass through the partition 1 in the thickness direction. For example, a via 11 can be provided in the partition 1 to facilitate the passage of the first conductive member 222 through the partition 1. Alternatively, the first conductive member 222 can be positioned at an existing notch in the partition 1 to allow the first conductive member 222 to pass through the partition 1. Alternatively, the first conductive member 222 can be passed through the partition 1 from the outside of the partition 1.

[0065] In some embodiments, the first conductive member 222 can be a wire commonly used in the art, such as a copper wire or an aluminum wire. The first end 2221 of the first conductive member 222 and the pin of the test resistor 221 can be clipped together, or can be fixedly connected together by welding, binding, etc. The second end 2223 of the first conductive member 222 is electrically connected to the second conductive member 223, and the connection method can also be clipped, welded, bound, etc.

[0066] In other embodiments, the first conductive member 222 may also be a mechanical element having conductive properties. Figure 10 The first end 2221 of the first conductive member 222 is elastic, and the test resistor 221 is located in the rebound direction of the first end 2221 and abuts against the first end 2221. The first end 2221 of the first conductive member 222 has a certain degree of deformation, thereby having a restoring force, which can tightly abut against a pin of the test resistor 221 to prevent disconnection. For example, the first conductive member 222 can be a torsion spring, the spring coil of which can be fixed to the partition 1, with one spring arm abutting against the pin of the test resistor 221, and the other spring arm passing through the partition 1 to be electrically connected to the second conductive member 223.

[0067] The second conductive member 223 is a component used to establish or disconnect an electrical connection with the second circuit 22 when the test button 5 is actuated. The second conductive member 223 is electrically connected to the first conductive member 222. Furthermore, the second conductive member 223 can move or rotate when the test button 5 is actuated to establish an electrical connection with the second circuit 22, and disconnect from the second circuit 22 when the test button 5 is deactivated or actuated again.

[0068] like Figure 4 As shown, in some embodiments of the present application, the second conductive member 223 may include a fixed portion 2231 and a conductive arm 2232. The second conductive member 223 is mounted on the partition 1 through the fixed portion 2231. The conductive arm 2232 is connected to the fixed portion 2231 and can rotate with the fixed portion 2231 as the rotation center; the test button 5 is connected to or against the conductive arm 2232 when actuated.

[0069] Optionally, the first conductive member 222 can be electrically connected to the conductive arm 2232 of the second conductive member 223 under normal conditions; or it can be electrically connected to the conductive arm 2232 of the second conductive member 223 only under the leakage test state, that is, under the leakage test, the test button 5 actuates the conductive arm 2232 to rotate to electrically connect the first conductive member 222 and the second circuit 22 at the same time.

[0070] Optionally, the first conductive member 222 may also be connected to the fixing portion 2231 of the second conductive member 223 to avoid positional displacement of the first conductive member 222 caused by movement of the conductive arm 2232 .

[0071] In some embodiments of the present application, Figure 5 As shown, the second conductive member 223 is an elastic member, and the test button 5 is located in the rebound direction of the conductive arm 2232 of the second conductive member 223. The conductive arm 2232 of the second conductive member 223 has a certain degree of deformation, thus exerting a restoring force, which allows it to tightly abut against the bottom of the test button 5. This ensures that the test button 5 is securely installed in the button mounting hole and prevents it from falling. This reduces the number of mounting parts, lowering costs and assembly complexity. Furthermore, after the test button 5 is no longer pressed, the test button 5 and the conductive arm 2232 return to their original positions due to the restoring force, automatically disconnecting the electrical connection with the second circuit 22.

[0072] Optionally, the bottom of the test button 5 has a groove 51 opening toward the conductive arm 2232, and a portion of the conductive arm 2232 is located in the groove 51, so that the test button 5 can more firmly clamp the conductive arm 2232 through the groove 51, further preventing the test button 5 from falling off the conductive arm 2232.

[0073] For example, the second conductive member 223 may be a torsion spring, a metal spring, etc. Figure 7 As shown, when the second conductive member 223 is a torsion spring, the fixed portion 2231 includes the torsion spring's coil 2233 and a first spring arm 2234, and the conductive arm 2232 is the torsion spring's second spring arm. The second side of the partition 1 has a fixed post 13, where the torsion spring's coil 2233 is sleeved on the fixed post 13, and the first spring arm 2234 abuts against or connects to the partition 1. Therefore, when the second conductive member 223 is a torsion spring, the layout is more concise and space-saving.

[0074] like Figure 8 As shown, in some embodiments of the present application, a via hole 11 is opened on the partition 1, and the via hole 11 passes through the partition 1 in the thickness direction. The first conductive member 222 includes a first end 2221, a middle part 2222 and a second end 2223 connected in sequence.

[0075] Optionally, the first end 2221 and the middle portion 2222 of the first conductive member 222 may be located on the first side of the partition 1. Figure 8The first side of the partition 1 is provided with a first receiving groove 12, the through hole 11 is adjacent to the fixed column 13, the first end 2221 of the first conductive member 222 is electrically connected to the test resistor 221, the middle portion 2222 is located in the first receiving groove 12, the second end 2223 passes through the through hole 11, and the portion of the second end 2223 extending from the through hole 11 contacts the inner wall of the spring coil 2233 of the torsion spring. The first receiving groove 12 allows the middle portion 2222 of the first conductive member 222 to be embedded in or housed inside the partition 1 to avoid affecting the operation of other mechanisms. The second end 2223 of the first conductive member 222 is caught by the spring coil 2233 of the torsion spring (i.e., the second conductive member 223) and the fixed column 13, and is not easy to fall off. At the same time, this arrangement is more concise and saves space.

[0076] In order to ensure that the second end 2223 of the first conductive member 222 is firmly clamped, the diameter of the spring coil 2233 of the torsion spring can be equal to the sum of the diameter of the fixing column 13 and the diameter of the second end 2223 of the first conductive member 222; or Figure 9 As shown, the fixing column 13 has a notch. In the radial direction of the spring coil 2233 , the length of the notch is exactly equal to the length of the second end 2223 of the first conductive member 222 .

[0077] Optionally, the middle portion 2222 and second end 2223 of the first conductive member 222 may also be located on the second side of the separator 1. A second receiving slot is defined on the second side of the separator 1, with the via 11 located on a side of the second receiving slot near the test resistor 221. The first end 2221 of the first conductive member 222 passes through the via 11 and is electrically connected to the test resistor 221. The middle portion 2222 is located within the second receiving slot, and the second end 2223 is electrically connected to the second conductive member 223. The second receiving slot allows the middle portion 2222 of the first conductive member 222 to be embedded or housed within the separator 1, thereby preventing it from interfering with the operation of other mechanisms.

[0078] In some embodiments of the present application, Figure 11 As shown, the first circuit 21 includes a movable contact 211 and a flexible wire 212. The movable contact 211 is electrically connected to the first terminal 3 via the flexible wire 212. Since the test circuit 2 uses a portion of the contact system of the residual current circuit breaker as the first circuit 21, the circuit structure is simplified, the number of parts is reduced, and the cost is reduced.

[0079] Figure 11 It is a structural diagram of the leakage circuit breaker on the second side of the partition 1 in the open state provided by an embodiment of the present application, wherein in the open state, the moving contact 211 and the static contact of the contact system are separated. Figure 12 It is a structural diagram of the leakage circuit breaker on the second side of the partition 1 in the closed state provided by an embodiment of the present application, wherein in the closed state, the moving contact 211 and the static contact of the contact system are in contact.

[0080] like Figure 11 and Figure 12 As shown, the moving contact 211 has a conductive column 2111, which extends in a direction away from the partition 1; the conductive column 2111 is configured so that: in the open state, the second circuit 22 cannot contact the conductive column 2111 when the test button 5 is pressed, so that the first circuit 21 and the second circuit 22 cannot be connected; in the closed state, the second circuit 22 can contact the conductive column 2111 when the test button 5 is pressed, so that the first circuit 21 and the second circuit 22 are connected.

[0081] See also Figure 11 In the open state, the second circuit 22 and the conductive post 2111 are normally far apart. Even if the test button 5 is pressed, causing it to move the second circuit 22 toward the conductive post 2111, it cannot contact the conductive post 2111. Therefore, in the open state, regardless of whether the test button 5 is pressed or not, the first circuit 21 and the second circuit 22 cannot be electrically connected. In other words, in the open state, the moving contact 211 and the static contact are separated. At this time, whether in the normal state or the leakage test state, the test circuit 2 cannot be connected. This avoids the problem of artificial leakage current caused by the test circuit 2 being connected due to the inadvertent pressing of the test button 5 in the open state, thereby improving safety.

[0082] See also Figure 12 After the switch is closed, the position of the conductive post 2111 moves closer to the second circuit 22 as the movable contact 211 moves. Therefore, in the closed state, the second circuit 22 and the conductive post 2111 are normally close to each other but not conductive. At this time, pressing the test button 5 will move the second circuit 22 toward the conductive post 2111 and contact the conductive post 2111, thereby connecting the first circuit 21 and the second circuit 22. That is to say, in the closed state, the moving contact 211 and the static contact are in contact. Under normal circumstances, the test circuit 2 is disconnected. In the leakage test state, the test button 5 is pressed to activate the test circuit 2, and then the live wire and the neutral wire are short-circuited. By observing whether the leakage protector disconnects the circuit, it is judged whether its function is normal: if the mechanism system of the leakage protector is pushed to trip, causing the moving contact 211 and the static contact to separate, it means that the leakage circuit breaker functions normally; if the mechanism system of the leakage protector is not pushed to trip, the moving contact 211 and the static contact are still in contact, then the leakage circuit breaker functions abnormally and needs to be repaired or replaced.

[0083] In summary, the leakage circuit breaker provided in the embodiments of the present application has at least the following advantages:

[0084] First, the two ends of the test loop 2 are connected to the live wire input terminal and the neutral wire output terminal for power supply, or connected to the neutral wire input terminal and the live wire output terminal for power supply, so that the sum of the current vectors passing through the two main conductors of the transformer in the leakage test state is not zero. Therefore, on the one hand, it can meet the working needs of the transformer, so that the transformer can trigger the mechanism action in time to disconnect the circuit during the test; on the other hand, since the test loop 2 does not need to pass through the transformer, the assembly is simpler.

[0085] Second, the test circuit 2 has only a single breakpoint. By using part of the structure in the contact system of the leakage circuit breaker as the first circuit 21 of the test circuit 2, the circuit structure is simplified, the complexity of the circuit layout is reduced, and the cost is reduced.

[0086] Third, in the tripped state, even if the test button 5 is pressed due to an erroneous operation, the test circuit 2 will not be turned on, thereby improving the safety of the leakage circuit breaker.

[0087] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0088] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A leakage circuit breaker, characterized in that: The leakage circuit breaker comprises a partition (1), a test circuit (2), a first terminal (3), a second terminal (4) and a test button (5); The test circuit (2), the first terminal (3), the second terminal (4) and the test button (5) are all mounted on the partition (1); The first terminal (3) and the second terminal (4) are respectively one of the live wire incoming terminal and the neutral wire outgoing terminal, or respectively one of the neutral wire incoming terminal and the live wire outgoing terminal; The test circuit (2) comprises a first circuit (21) and a second circuit (22), wherein the first circuit (21) comprises a movable contact (211) and a soft wire (212), wherein the movable contact (211) is electrically connected to the first terminal (3) via the soft wire (212), wherein the movable contact (211) has a conductive column (2111), wherein the conductive column (2111) extends away from the partition (1), and the second circuit (22) is electrically connected to the second terminal (4), wherein under normal conditions, the first circuit (21) and the second circuit ( 22) is disconnected, and in the leakage test state, the conductive column (2111) is configured so that: in the open state, the second circuit (22) cannot contact the conductive column (2111) when the test button (5) is pressed, so that the first circuit (21) and the second circuit (22) cannot be connected; in the closed state, the second circuit (22) can contact the conductive column (2111) when the test button (5) is pressed, so that the first circuit (21) and the second circuit (22) can be connected.

2. The leakage circuit breaker according to claim 1, characterized in that: The second circuit (22) comprises a test resistor (221), a first conductive member (222), and a second conductive member (223) electrically connected in sequence; The test resistor (221) is mounted on a first side of the partition (1), and one end of the test resistor (221) away from the first conductive member (222) is electrically connected to the second terminal (4); The second conductive member (223) is mounted on a second side of the partition (1), the second side being opposite to the first side, and the second conductive member (223) is adapted to move when the test button (5) is actuated.

3. The leakage circuit breaker according to claim 2, characterized in that: The second conductive member (223) comprises a fixed portion (2231) and a conductive arm (2232); the second conductive member (223) is mounted on the partition (1) via the fixed portion (2231); the conductive arm (2232) is connected to the fixed portion (2231) and can rotate with the fixed portion (2231) as a rotation center; The test button (5) is connected to or abuts against the conductive arm (2232) when actuated.

4. The leakage circuit breaker according to claim 3, characterized in that: The second conductive member (223) is an elastic member, and the test button (5) is located in the rebound direction of the conductive arm (2232) of the second conductive member (223).

5. The leakage circuit breaker according to claim 3 or 4, characterized in that: The bottom of the test button (5) has a groove (51) opening toward the conductive arm (2232); A portion of the conductive arm (2232) is located in the groove (51).

6. The leakage circuit breaker according to claim 3 or 4, characterized in that: The second side of the partition (1) has a fixing column (13); The second conductive member (223) is a torsion spring, wherein the fixing portion (2231) includes a spring coil (2233) and a first spring arm (2234) of the torsion spring, wherein the spring coil (2233) is sleeved on the fixing column (13), and the first spring arm (2234) is against or connected to the partition (1); and the conductive arm (2232) is the second spring arm of the torsion spring.

7. The leakage circuit breaker according to claim 6, characterized in that: The partition (1) is provided with a through hole (11), and the through hole (11) passes through the partition (1) in the thickness direction; The first conductive member (222) comprises a first end (2221), a middle portion (2222), and a second end (2223) connected in sequence; A first receiving groove (12) is provided on the first side of the partition (1), and the through hole (11) is adjacent to the fixing column (13); the first end (2221) of the first conductive member (222) is electrically connected to the test resistor (221), the middle portion (2222) is located in the first receiving groove (12), the second end (2223) passes through the through hole (11), and the portion of the second end (2223) extending from the through hole (11) contacts the inner wall of the spring coil (2233).

8. The leakage circuit breaker according to claim 7, characterized in that: The first end (2221) of the first conductive member (222) is elastic, and the test resistor (221) is located in the rebound direction of the first end (2221) and is offset from the first end (2221).

Images