Circuit breaker

Abstract

The embodiment of the utility model provides a circuit breaker. A housing of the circuit breaker includes an opening. The magnetic tripping assembly is arranged in the shell and comprises a coil framework. The test circuit is electrically connected with the magnetic tripping assembly and comprises a first electrode end and a second electrode end. The first electrode end and the second electrode end are spaced apart, and the first electrode end and the second electrode end are coupled to the bobbin. The first elastic member is conductive. The first elastic piece comprises a first connecting end and a second connecting end, and the first connecting end is suitable for being electrically connected with the first electrode end. The test button is slidably coupled to the housing at the opening and abuts against the second connection end. The test button is configured to drive the second connection end to be in contact with or separated from the second electrode end. Under the condition that the second connecting end is in contact with the second electrode end, the test circuit is switched on. By means of the arrangement, the first electrode end and the second electrode end are integrated on the coil framework, and the occupied space can be reduced. In addition, the first elastic piece can reduce the number of parts of the test loop.

Description

Technical Field

[0001] The embodiments disclosed herein relate generally to the field of electrical equipment, and more particularly to a circuit breaker. Background Technology

[0002] Circuit breakers have extremely wide applications in industrial and residential sectors. They not only prevent fires caused by overloads or short circuits but also protect expensive machinery on industrial production lines from electrical faults. To better meet users' safety needs, many circuit breakers integrate residual current protection (RCD) functions. However, in some conventional circuit breakers, the components related to RCD testing are often independently installed. These RCD testing components occupy part of the circuit breaker's internal space, making it difficult to reduce the circuit breaker's size and hindering the miniaturization of its structure. Utility Model Content

[0003] The purpose of embodiments of this disclosure is to provide a circuit breaker that at least partially solves the above-described problems and other potential problems.

[0004] Embodiments of this disclosure provide a circuit breaker. The circuit breaker includes: a housing with an opening; a magnetic trip assembly disposed within the housing and including a coil frame; a test circuit electrically connected to the magnetic trip assembly and including a first electrode and a second electrode, the first and second electrodes being spaced apart and coupled to the coil frame; a first elastic member disposed within the housing, the first elastic member being conductive and including a first connecting end and a second connecting end, the first connecting end being adapted to be electrically connected to the first electrode; and a test button slidably coupled to the housing at the opening and abutting against the second connecting end, the test button being configured to drive the second connecting end to contact or separate from the second electrode, wherein when the second connecting end contacts the second electrode, the test circuit is activated.

[0005] In some embodiments, the circuit breaker further includes: an operating component rotatably coupled to the housing and configured to switch between a closed position and an open position; and an actuator disposed within the housing and rotatably coupled to the housing, the actuator including a first end and a second end, the first end being coupled to a first connection end and the second end being coupled to the operating component, wherein when the operating component is in the open position, the operating component drives the actuator to disengage the first connection end from the first electrode terminal, and when the operating component is in the closed position, the operating component drives the actuator to contact the first connection end with the first electrode terminal.

[0006] In some embodiments, the circuit breaker further includes a conductive sheet coupled to the coil frame and electrically connected to a second electrode.

[0007] In some embodiments, the test circuit further includes a test resistor coupled to the coil frame and electrically connected to the phase line within the circuit breaker, the test resistor including a first terminal.

[0008] In some embodiments, the coil frame includes a support portion disposed on the side of the coil frame facing the opening, and includes a through hole and a support plane, a test resistor disposed in the through hole, the support plane facing the opening, and a conductive sheet coupled to the support plane.

[0009] In some embodiments, the second end of the actuator is provided with a protrusion for cooperating with the operating component.

[0010] In some embodiments, a slide rail is provided on the housing at a position corresponding to the opening, and the test button includes a groove that is slidably coupled to the slide rail so that the test button is slidably coupled to the housing at the opening.

[0011] In some embodiments, the magnetic trip assembly further includes a slidable core disposed within and slidably coupled to the coil frame, the housing includes an indicator window, and the circuit breaker further includes: a leakage current indicator disposed within the housing and configured to switch between an initial position and an indicated position, the leakage current indicator including an identification end, wherein the identification end corresponds to the indicator window when the leakage current indicator is in the indicated position; and a drive member disposed within the housing and coupled to the slidable core, the drive member being movable with the slidable core to drive the leakage current indicator to switch between the initial position and the indicated position.

[0012] In some embodiments, the indicator window is positioned adjacent to the opening.

[0013] In some embodiments, the circuit breaker further includes a second elastic member disposed within the housing and coupled to the leakage current indicator and the housing, the second elastic member being configured to apply a force to the leakage current indicator to move the leakage current indicator from an indicated position to an initial position.

[0014] In some embodiments, the first elastic element and / or the second elastic element includes a torsion spring.

[0015] In some embodiments, it further includes a transparent element disposed at the indicator window and coupled to the housing.

[0016] In embodiments of this disclosure, the circuit breaker includes a housing, a magnetic trip assembly, a test circuit, a first resilient element, and a test button. The housing includes an opening. The magnetic trip assembly is disposed within the housing and includes a coil frame. The test circuit is electrically connected to the magnetic trip assembly and includes a first terminal and a second terminal. The first and second terminals are spaced apart and coupled to the coil frame. The first resilient element is disposed within the housing. The first resilient element is conductive and includes a first connection end and a second connection end, the first connection end being adapted to be electrically connected to the first terminal. The test button is slidably coupled to the housing at the opening and abuts against the second connection end. The test button is configured to actuate the second connection end to or away from the second terminal. When the second connection end contacts the second terminal, the test circuit is activated. This arrangement, integrating the first and second terminals of the test circuit onto the coil frame of the magnetic trip assembly, reduces the space occupied within the circuit breaker. Furthermore, by using the first elastic element to reset the test button to connect the circuit, the number of components in the entire test circuit is reduced, further saving space inside the circuit breaker, thus contributing to the simplification and miniaturization of the circuit breaker structure.

[0017] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0019] Figure 1 A perspective view of a circuit breaker according to an embodiment of the present disclosure is shown;

[0020] Figure 2 A schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present disclosure is shown, in which a test resistor is illustrated;

[0021] Figure 3 A schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present disclosure is shown, illustrating a test circuit, a leakage current indicator, and a drive unit;

[0022] Figure 4 A schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present disclosure is shown, wherein the operating component is shown in the closed position;

[0023] Figure 5 A schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present disclosure is shown, wherein the operating component is shown in the open position;

[0024] Figure 6 A perspective view of the first electrode and conductive sheet according to an embodiment of the present disclosure is shown;

[0025] Figure 7 A perspective view of the coil frame according to an embodiment of the present disclosure is shown;

[0026] Figure 8 A perspective view of a leakage current indicator according to an embodiment of the present disclosure is shown; and

[0027] Figure 9 A perspective view of a driver according to an embodiment of the present disclosure is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Housing; 11. Opening; 12. Indicator window; 13. Slide rail;

[0030] 20. Magnetic trip assembly; 21. Coil frame; 22. Support part; 23. Through hole; 24. Support plane; 25. Sliding core;

[0031] 30. Test circuit; 310. Test resistor; 31. First terminal; 32. Second terminal;

[0032] 40. First elastic element; 41. First connecting end; 42. Second connecting end;

[0033] 51. Test button; 511. Slide groove; 52. Actuator; 521. First end; 522. Second end; 5220. Protrusion; 523. Pin; 53. Conductive sheet; 55. Transparent part;

[0034] 60. Operation components;

[0035] 71. Leakage indicator; 711. Identification terminal; 72. Second elastic element; 73. Driving element. Detailed Implementation

[0036] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0037] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0038] As mentioned above, in some conventional circuit breakers, the components related to leakage current testing are often set up independently. These leakage current testing components occupy part of the space inside the circuit breaker, making it difficult to reduce the size of the circuit breaker and hindering the simplification and miniaturization of the circuit breaker structure.

[0039] Embodiments of this disclosure provide a circuit breaker. The circuit breaker includes a housing, a magnetic trip assembly, a test circuit, a first resilient element, and a test button. The housing includes an opening. The magnetic trip assembly is disposed within the housing and includes a coil frame. The test circuit is electrically connected to the magnetic trip assembly and includes a first terminal and a second terminal. The first and second terminals are spaced apart and coupled to the coil frame. The first resilient element is disposed within the housing. The first resilient element is conductive and includes a first connection terminal and a second connection terminal. The first connection terminal is electrically connected to the first terminal. The test button is slidably coupled to the housing at the opening and abuts against the second connection terminal. The test button is capable of actuating the second connection terminal to contact or disengage from the second terminal. When the second connection terminal contacts the second terminal, the test circuit is activated. This arrangement integrates the first and second terminals of the test circuit onto the coil frame of the magnetic trip assembly, reducing the space occupied within the circuit breaker. Furthermore, utilizing the first elastic element to reset the test button to connect the circuit reduces the number of components in the entire test circuit, further saving space within the circuit breaker and thus contributing to the simplification and miniaturization of the circuit breaker structure. The following will combine... Figures 1 to 9 The principles of this disclosure will be described in detail below.

[0040] like Figures 1 to 5 As shown, the circuit breaker includes a housing 10, a magnetic trip assembly 20, a test circuit 30, a first elastic element 40, and a test button 51. The housing 10 is the external frame of the entire circuit breaker, protecting the internal components from external interference and damage. An opening 11 is provided on the housing 10 for installing and operating the test button 51.

[0041] The magnetic trip assembly 20 can disconnect the circuit to protect the electrical system in the event of an overload or short circuit. The magnetic trip assembly 20 includes a coil frame 21, a coil wound around the coil frame 21, and a sliding core 25 disposed within the coil frame 21. The coil frame 21 is a support structure used to fix the coil and maintain its shape, while providing necessary insulation. The coil generates a magnetic field to control the movement of the sliding core 25, thereby realizing the tripping function of the circuit breaker. During use, the sliding core 25 slides within the coil frame 21 under the influence of the magnetic field. When the current exceeds a preset value, the movement of the sliding core 25 triggers the tripping mechanism, thereby disconnecting the circuit.

[0042] like Figure 3 As shown, the test circuit 30 is electrically connected to the magnetic trip assembly 20 to detect and simulate leakage current, ensuring the normal operation of the circuit breaker's leakage protection function. The test circuit 30 includes a first electrode 31 and a second electrode 32. The first electrode 31 and the second electrode 32 are spaced apart and coupled to the coil frame 21. The first electrode 31 and the second electrode 32 of the test circuit 30 can be directly mounted on the coil frame 21, thereby reducing the space occupied inside the circuit breaker.

[0043] As an example, one of the first electrode 31 and the second electrode 32 can be connected to the phase wire, and the other electrode can be connected to the neutral wire. When there is no leakage current in the circuit, the current flowing through the phase wire and the neutral wire is equal. If leakage current occurs, such as current flowing to the ground wire or other paths, the current between the phase wire and the neutral wire will be unbalanced. The current detection unit (e.g., a current transformer) in the residual current circuit breaker will detect this imbalance and trigger a tripping mechanism when the residual current reaches a preset operating threshold, quickly cutting off the power supply and ensuring safety.

[0044] like Figure 2As shown, the first elastic element 40 is disposed within the housing 10. In embodiments of this disclosure, the first elastic element 40 has conductive properties and can perform both mechanical and electrical functions. The first elastic element 40 includes a first connecting end 41 and a second connecting end 42, thereby allowing the first connecting end 41 to be electrically connected to the first electrode 31 of the test circuit 30. It should be noted that, in this disclosure, the electrical connection between the first connecting end 41 and the first electrode 31 refers to the form in which the first connecting end 41 can achieve an electrical connection with the first electrode 31 of the test circuit 30 based on its conductive properties. For example, it may include a state in which the first connecting end 41 is in contact with the first electrode 31, or a state in which the first connecting end 41 is separated from the first electrode 31. The test button 51 is disposed at the opening 11 of the housing 10 and is slidably coupled to the housing 10. The test button 51 abuts against the second connecting end 42 of the first elastic element 40, and the first elastic element 40 can apply a force to the test button 51 to move the test button 51 to an initial position.

[0045] When the user presses the test button 51, the test button 51 drives the second connecting end 42 of the first elastic element 40 to move downward, making it contact the second electrode 32 of the test circuit 30. In this case, the test circuit 30 is turned on, simulating a leakage current situation, which can detect whether the leakage protection function is working properly. When the user releases the test button 51, under the elastic action of the first elastic element 40, the second connecting end 42 separates from the second electrode 32, the test circuit 30 is disconnected, and the circuit breaker returns to normal operation.

[0046] By using this arrangement, the circuit is connected by using the first elastic element 40 to mechanically reset the drive test button 51, which reduces the number of components in the entire test circuit and can further save space inside the circuit breaker, thereby contributing to the miniaturization of the circuit breaker structure.

[0047] In some embodiments, such as Figure 2 As shown, the first elastic element 40 can be a torsion spring. The first connecting end 41 is the first torsion arm of the torsion spring, and the second connecting end 42 is the second torsion arm of the torsion spring. The first torsion arm can be electrically connected to the first terminal 31 of the test circuit 30, while the second torsion arm is in contact with the test button 51 and can be in contact with or separate from the second terminal 32.

[0048] In some embodiments, such as Figures 2 to 5 As shown, the circuit breaker also includes an operating component 60 and an actuator 52. The operating component 60 is rotatably coupled to the housing 10 and can switch between a closed position and an open position to control the operating state of the circuit breaker. In some embodiments, the operating component 60 may be a system consisting of a handle and a four-bar linkage. The handle, as the part directly operated by the user, transmits rotational motion to the inside of the circuit breaker through the four-bar linkage to realize the closing and opening operations.

[0049] like Figure 2 As shown, actuator 52 is disposed within housing 10 and rotatably coupled to housing 10. Actuator 52 includes a first end 521 and a second end 522. The first end 521 of actuator 52 is coupled to a first connection end 41. The second end 522 of actuator 52 is coupled to actuation component 60. Actuator 52 can convert the movement of actuation component 60 into contact or separation between the first connection end 41 and the first electrode 31.

[0050] As an example, actuator 52 may include two branches, such as a first branch and a second branch. Both the first and second branches have two opposing ends. One end of the first branch connects to one end of the second branch, forming a common end at the connection. A pin 523 may be provided at the common end. Actuator 52 can be connected to the circuit breaker housing 10 via pin 523, and actuator 52 can rotate about pin 523. An angle exists between the first and second branches. The end of the first branch furthest from the common end (i.e., the first end 521) is coupled to the first connection end 41. The end of the second branch furthest from the pin (i.e., the second end 522) is coupled to the operating assembly 60. With this arrangement, when the operating assembly 60 moves, it can drive the second branch to move, thereby causing the first branch to rotate about pin 523. At this time, the first end 521 on the first branch can drive the first connection end 41 to contact or separate from the first electrode terminal 31.

[0051] In some embodiments, such as Figure 2 As shown, the included angle between the first branch and the second branch can be 180°. Here, the actuator 52 forms a lever structure that can rotate around the pin 523. When the actuator 52 rotates clockwise under the action of the operating component 60, the second end 522 sinks and the first end 521 rises. The first end 521 can separate the first connecting end 41 from the first electrode terminal 31. When the actuator 52 rotates counterclockwise under the action of the operating component 60, the second end 522 rises and the first end 521 sinks. The first end 521 can bring the first connecting end 41 into contact with the first electrode terminal 31.

[0052] It should be understood that in other embodiments, based on considerations of space utilization within the housing 10, the included angle between the first branch and the second branch may also be other angles. For example, the first branch and the second branch may form a bifurcated structure of 60° or 90°. This disclosure is not intended to limit the specific structural form.

[0053] When the operating component 60 is in the open position, the four-bar linkage can drive the actuator 52, causing the first end 521 of the actuator 52 to separate the first connecting end 41 from the first electrode 31. In this way, the test circuit is disconnected, and leakage current testing cannot be performed. With the circuit breaker in the open state, the leakage current protection function will not be falsely triggered, avoiding unnecessary safety hazards.

[0054] When the operating component 60 is in the closed position, the four-bar linkage drives the actuator 52, causing the first end 521 of the actuator 52 to bring the first connecting end 41 into contact with the first electrode 31. At this time, the test circuit is connected, and leakage current testing can be performed to ensure that the leakage current protection function of the circuit breaker is working properly.

[0055] By using mechanical linkage, the connection and disconnection of the test circuit are ensured to strictly correspond to the working state of the circuit breaker, which can improve the safety and stability of the system.

[0056] In some embodiments, such as Figure 2 and Figure 6 As shown, the circuit breaker also includes a conductive piece 53. The conductive piece 53 is coupled to the coil frame 21 and electrically connected to the second electrode 32. The conductive piece 53 can provide a contact surface to facilitate contact between the second connection end 42 of the first elastic member 40 and the second electrode 32.

[0057] When the test button 51 is pressed, the second connecting end 42 of the first elastic element 40 contacts the conductive sheet 53, thereby indirectly forming an electrical connection with the second electrode 32, ensuring that the test circuit 30 is successfully connected. The conductive sheet 53 makes the contact position flatter and smoother, reducing the risk of poor contact, thereby improving the accuracy and reliability of the circuit breaker during leakage current testing.

[0058] In some embodiments, such as Figure 2 and Figure 3 As shown, the test circuit 30 also includes a test resistor 310. The test resistor 310 is coupled to the coil frame 21 and electrically connected to the phase line within the circuit breaker. During leakage current testing, the test resistor 310 can simulate a leakage path to generate a predetermined leakage current, thereby detecting whether the leakage protection function of the circuit breaker is functioning correctly. In embodiments of this disclosure, the first terminal 31 is integrated directly onto the test resistor 310. This reduces the number of components in the test circuit 30, thereby reducing the size of the test circuit 30.

[0059] In some embodiments, such as Figure 2 and Figure 7As shown, the coil frame 21 includes a support portion 22. The support portion 22 is disposed on the side of the coil frame 21 facing the opening 11, and the support portion 22 includes a through hole 23 and a support plane 24. The through hole 23 is used to install the test resistor 310, ensuring that it is stably fixed on the coil frame 21. As an example, the through hole 23 can extend through the entire support portion 22. When the test resistor 310 is installed in the through hole 23, the two ends of the test resistor 310 are located on both sides of the support portion 22. One end of the test resistor 310 is electrically connected to the phase line in the circuit breaker, and the other end of the test resistor 310 integrates a first electrode 31. To facilitate contact between the first electrode 31 and the first electrode 31, the central axis of the through hole 23 is perpendicular to the central axis of the sliding core 25 of the magnetic trip assembly, that is, the central axis of the through hole 23 is parallel to the central axis of the pin 523.

[0060] The support plane 24 faces the opening 11, and the conductive sheet 53 is coupled to the support plane 24. In this way, the test resistor 310, the first electrode 31, and the second electrode 32 can be integrated on the coil frame 21, which not only saves space but also ensures the stability of these components.

[0061] In some embodiments, such as Figure 2 As shown, the second end 522 of the actuator 52 is provided with a protrusion 5220 for cooperating with the operating component 60. In some embodiments, the four-bar linkage of the operating component 60 may be provided with a corresponding groove. The protrusion 5220 cooperates with the groove, and the movement of the operating component 60 can be stably transmitted to the actuator 52. When the user operates the four-bar linkage through the handle, the movement of the four-bar linkage can be transmitted to the actuator 52 through the cooperation of the groove and the protrusion 5220.

[0062] In this way, the first end 521 of the actuator 52 can effectively drive the first connection end 41 to contact or separate from the first electrode end 31, thereby realizing the connection and disconnection of the test circuit.

[0063] In some embodiments, such as Figure 3 and Figure 4 As shown, a slide rail 13 is provided on the housing 10 at the position corresponding to the opening 11. The test button 51 includes a slide groove 511 that matches the slide rail 13. The slide groove 511 is slidably coupled to the slide rail 13. Through the cooperation of the slide rail 13 and the slide groove 511, the movement of the test button 51 is more stable, reducing the risk of poor contact or false triggering due to improper operation.

[0064] In some embodiments, such as Figures 1 to 5 , Figure 8 and Figure 9As shown, the housing 10 includes an indicator window 12. The circuit breaker also includes a residual current indicator 71 and a drive unit 73. The residual current indicator 71 is disposed within the housing 10 and can be switched between an initial position and an indicated position. The residual current indicator 71 includes a marking end 711. When the residual current indicator 71 is in the indicated position, the marking end 711 corresponds to the indicator window 12 on the housing 10, thereby clearly displaying the status of the circuit breaker.

[0065] like Figures 3 to 5 as well as Figure 9 As shown, the drive element 73 is also disposed within the housing 10 and coupled to the sliding core 25. The sliding core 25 is part of the magnetic trip assembly 20, and when an overload or short circuit occurs in the circuit, the sliding core 25 will move under the action of the magnetic field. The drive element 73 moves with the movement of the sliding core 25, thereby driving the leakage current indicator 71 to switch between the initial position and the indicated position.

[0066] When the circuit is operating normally, the sliding core 25 remains in its initial position, as do the drive element 73 and the leakage current indicator 71. The indicator terminal 711 does not correspond to the indicator window 12, indicating that the circuit breaker is in normal operating condition.

[0067] When an overload, short circuit, or leakage current test occurs, the sliding core 25 moves under the influence of the magnetic field, causing the drive component 73 to move as well. The drive component 73 pushes the leakage current indicator 71 from the initial position to the indicating position, so that the marking end 711 corresponds to the indicating window 12, thereby intuitively showing that the circuit breaker has tripped or is in a fault state.

[0068] In some embodiments, such as Figure 1 As shown, the indicator window 12 is positioned adjacent to the opening 11. After pressing the test button 51, the operator can directly observe whether the leakage protection function of the circuit breaker is effective at the adjacent indicator window 12, making the effect more intuitive.

[0069] In some embodiments, such as Figure 3 As shown, the circuit breaker also includes a second elastic element 72. The second elastic element 72 is disposed within the housing 10 and coupled to the leakage current indicator 71 and the housing 10. The second elastic element 72 can apply a force to the leakage current indicator 71 to move it from the indicated position to the initial position.

[0070] When the circuit breaker undergoes a leakage current test and triggers the protection function, the leakage current indicator 71 will switch from the initial position to the indicating position under the action of the drive element 73. The marking end 711 corresponds to the indicating window 12, indicating that the circuit breaker has tripped or is in a protected state. After the leakage current test is completed, the second elastic element 72 will drive the leakage current indicator 71 to return from the indicating position to the initial position, preparing for the next test or indication.

[0071] In some embodiments, the second elastic element 72 may be a torsion spring. The torsion spring is disposed within the housing 10 and coupled to the leakage current indicator 71 and the housing 10.

[0072] In some embodiments, such as Figure 1 As shown, the circuit breaker also includes a transparent element 55. The transparent element 55 is located at the indicator window 12 and coupled to the housing 10. The transparent element 55 clearly displays the marking terminals 711 inside the circuit breaker, allowing operators to visually observe the circuit breaker's operating status, such as whether it has tripped or is in a protected state. Secondly, the transparent element 55 also serves a sealing function, preventing dust, moisture, and debris from entering the circuit breaker's interior, thereby protecting internal components from contamination and damage.

[0073] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A circuit breaker characterized by, Comprising: a housing (10) comprising an opening (11); a magnetic trip assembly (20) disposed within the housing (10) and comprising a coil former (21); a test circuit (30) electrically connected with the magnetic trip assembly (20) and comprising a first electrode terminal (31) and a second electrode terminal (32), the first electrode terminal (31) and the second electrode terminal (32) being spaced apart, and the first electrode terminal (31) and the second electrode terminal (32) being coupled to the coil former (21); a first elastic member (40) disposed within the housing (10), the first elastic member (40) being electrically conductive, and the first elastic member (40) comprising a first connecting terminal (41) and a second connecting terminal (42), the first connecting terminal (41) being adapted to electrically connect with the first electrode terminal (31); and a test button (51) slidably coupled to the housing (10) at the opening (11) and abutting against the second connecting terminal (42), the test button (51) being configured to drive the second connecting terminal (42) to contact or separate from the second electrode terminal (32), wherein the test circuit (30) is turned on in the case that the second connecting terminal (42) contacts the second electrode terminal (32).

2. The circuit breaker of claim 1, wherein, Further comprising: an operating assembly (60) rotatably coupled to the housing (10) and configured to switch between a closed position and an open position; and an actuating member (52) disposed within the housing (10) and rotatably coupled to the housing (10), the actuating member (52) comprising a first end (521) and a second end (522), the first end (521) being coupled to the first connecting terminal (41), and the second end (522) being coupled to the operating assembly (60), wherein the operating assembly (60) drives the actuating member (52) to separate the first connecting terminal (41) from the first electrode terminal (31) in the case that the operating assembly (60) is in the open position, and the operating assembly (60) drives the actuating member (52) to contact the first connecting terminal (41) with the first electrode terminal (31) in the case that the operating assembly (60) is in the closed position. Further comprising:

3. The circuit breaker of claim 1 or 2, wherein an electrically conductive sheet (53) coupled to the coil former (21) and electrically connected with the second electrode terminal (32). The test circuit (30) further comprises:

4. The circuit breaker of claim 3, wherein, a test resistor (310) coupled to the coil former (21) and electrically connected with a phase line within the circuit breaker, the test resistor (310) comprising the first electrode terminal (31). The coil former (21) comprises:

5. The circuit breaker of claim 4, wherein, a support portion (22) disposed on a side of the coil former (21) facing the opening (11) and comprising a through hole (23) and a support plane (24), the test resistor (310) being disposed within the through hole (23), and the support plane (24) being disposed facing the opening (11), and the electrically conductive sheet (53) being coupled to the support plane (24). ​ 6. The circuit breaker of claim 2, wherein, The second end (522) of the actuating member (52) is provided with a protrusion (5220) for cooperating with the operating assembly (60).

7. The circuit breaker of any one of claims 1, 2, 4-6, wherein, The shell (10) is provided with a sliding rail (13) at a position corresponding to the opening (11), and the test button (51) comprises a sliding groove (511) which is slidably coupled to the sliding rail (13) so that the test button (51) is slidably coupled to the shell (10) at the opening (11).

8. The circuit breaker of any one of claims 1, 2, 4-6, wherein, The magnetic tripping assembly (20) further comprises a slidable core (25) which is arranged in the coil former (21) and is slidably coupled to the coil former (21), the shell (10) comprises an indication window (12), and the circuit breaker further comprises: An electric leakage indicating member (71) which is arranged in the shell (10) and is switchable between an initial position and an indication position, and the electric leakage indicating member (71) comprises an identification end (711), wherein the identification end (711) corresponds to the indication window (12) when the electric leakage indicating member (71) is in the indication position; and A driving member (73) which is arranged in the shell (10) and is coupled to the slidable core (25), the driving member (73) is configured to move with the slidable core (25) to drive the electric leakage indicating member (71) to switch between the initial position and the indication position.

9. The circuit breaker of claim 8, wherein, The indication window (12) is arranged adjacent to the opening (11).

10. The circuit breaker of claim 8, wherein, Further comprising: A second elastic member (72) which is arranged in the shell (10) and is coupled to the electric leakage indicating member (71) and the shell (10), the second elastic member (72) is configured to exert a force on the electric leakage indicating member (71) to move the electric leakage indicating member (71) from the indication position to the initial position.

11. The circuit breaker of claim 10, wherein, The first elastic member and / or the second elastic member comprises a torsion spring.

12. The circuit breaker of claim 8, wherein, Further comprising: A transparent member (55) which is arranged at the indication window (12) and is coupled to the shell (10).

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