Tripping device and earth leakage protection device

Abstract

The utility model provides a tripping device for providing electric leakage protection and an electric leakage protection device. The tripping device comprises a control circuit board; the coil assembly is coupled with the control circuit board and at least comprises a coil support and a static contact attached to the coil support; the moving assembly is attached to a moving contact arm, and the moving contact arm is provided with a moving electric contact corresponding to the static contact; wherein the moving assembly is configured to be capable of reciprocating between a first position and a second position relative to the coil assembly, in the first position, the moving electric contact and the static contact are disconnected to be in an open state, and in the second position, the moving contact arm is driven by the moving assembly to elastically deform and enable the moving electric contact to be in contact with the static contact to be in a closed state. According to the tripping device, the reset function and the tripping function are achieved through cooperative action of the coil assembly and the moving assembly, the capacity of automatically breaking current is achieved, and the functional requirement for power connection or disconnection of the input end and the output end is effectively met.

Description

Technical Field

[0001] The present disclosure generally relates to the electrical field, and more particularly to a tripping device used in a leakage protection device, and a leakage protection device including the tripping device. Background Art

[0002] In order to improve the safety of electricity use, leakage protection devices are being used more and more widely, and their application fields and scenarios are also continuing to increase. The movement structure in the existing leakage protection device occupies a large proportion of its internal space, making it difficult to add other additional functions to the leakage protection device, resulting in an inconsistent overall appearance of the product and reducing the overall aesthetics of the product. At present, more and more leakage protection devices on the market tend to be miniaturized, but the simple principle leads to weak breaking capacity. When a short-circuit current occurs, it is easy to cause the current contacts to stick together and fail to disconnect, posing a major safety hazard. In addition, existing products with strong breaking capacity mostly use a normally closed contact solution, which is difficult to assemble and not easy to process. Utility Model Content

[0003] The purpose of the present disclosure is to solve the problems existing in the above-mentioned prior art and to propose a tripping device, which realizes the reset function and / or tripping function required by the leakage protection device through fewer components and a compact structural design, thereby reducing the volume of the leakage protection device, especially improving the breaking current capacity, and at the same time has the characteristics of simple structure, easy assembly, high reliability, etc.

[0004] To this end, according to one aspect of the present disclosure, a tripping device is provided for providing leakage protection, the tripping device comprising: a control circuit board; a coil assembly, the coil assembly being coupled to the control circuit board and comprising at least a coil bracket and an electrostatic contact attached to the coil bracket; a moving assembly, the moving assembly being attached with a moving contact arm, the moving contact arm being provided with a moving electric contact corresponding to the electrostatic contact; wherein the moving assembly is configured to be able to reciprocate between a first position and a second position relative to the coil assembly, in the first position, the moving electric contact and the electrostatic contact are disconnected to be in an open state, and in the second position, the moving contact arm is elastically deformed by being driven by the moving assembly and causes the moving electric contact to contact the electrostatic contact to be in a closed state.

[0005] According to the above technical concept, the present disclosure may further include any one or more of the following optional forms.

[0006] In some optional forms, the moving component is provided with a closing limit portion, and the closing limit portion is configured to drive the moving contact arm to elastically deform so that the moving electric contact and the electrostatic contact are in a closed state during the movement of the moving component from the first position to the second position.

[0007] In some optional forms, the moving component is also provided with a disconnection limit portion, and the disconnection limit portion is configured to drive the moving contact arm to elastically deform so that the moving electric contact and the electrostatic contact are in a disconnected state during the process of the moving component moving from the second position to the first position.

[0008] In some optional forms, the closing limit portion and the disconnecting limit portion are arranged relative to each other, and the moving contact arm is arranged in a limit groove between the closing limit portion and the disconnecting limit portion.

[0009] In some optional forms, the moving contact arm is constructed to include a fixed section coupled to the control circuit board and a movable section that closes or disconnects the electrostatic contact, and an inclined connecting section is provided between the fixed section and the movable section, and the connecting section is arranged in the limiting groove.

[0010] In some optional forms, the closing limit portion and the breaking limit portion are respectively provided with convex surfaces protruding in opposite directions.

[0011] In certain optional forms, the tripping device includes a pair of moving contact arms, the moving assembly includes a pair of symmetrically arranged limit arms, each of the limit arms is respectively provided with the closing limit portion and the disconnecting limit portion, and each of the moving contact arms is respectively arranged in a limit groove between the corresponding closing limit portion and the disconnecting limit portion; the tripping device includes a pair of electrostatic contacts, each of the electrostatic contacts corresponds to the moving electric contact of each of the moving contact arms.

[0012] In some optional forms, the coil assembly further includes an electromagnetic coil and an iron core, wherein the electromagnetic coil is sleeved on the outside of the coil support, and the iron core is arranged in the coil support and can reciprocate between a direction toward the moving component and a direction away from the moving component.

[0013] In some optional forms, the trip device further includes a reset spring, which is disposed between the coil support and the iron core and provides a reset force for restoring the iron core in a direction away from the moving assembly.

[0014] In some optional forms, the moving component is provided with a hollow portion, a permanent magnet is fixed in the hollow portion, and the permanent magnet is suitable for adsorption with the iron core.

[0015] In certain optional forms, when the moving assembly is in the second position, the magnetic attraction force of the permanent magnet on the iron core is greater than the restoring force of the restoring spring.

[0016] In some optional forms, the polarity of the magnetic field of the permanent magnet facing the iron core is set to be the same as the polarity of the magnetic field generated by the iron core facing the permanent magnet after the electromagnetic coil is connected to the current.

[0017] In certain optional forms, the moving component is made of insulating material.

[0018] In certain optional forms, the trip device further includes a reset button, which is arranged adjacent to the coil assembly and configured to drive the core of the coil assembly to move toward the moving assembly.

[0019] In some optional forms, the trip device further includes a transformer bracket, on which a current transformer coupled to the control circuit board is provided, and the moving contact arm is fixedly mounted on the transformer bracket.

[0020] According to another aspect of the present disclosure, a leakage protection device is provided, and the leakage protection device includes the above-mentioned tripping device.

[0021] The tripping device disclosed in the present invention realizes the reset function and the tripping function in the leakage protection device through the coordinated action of the coil assembly and the motion assembly, and has the ability to automatically disconnect the current, effectively ensuring the functional requirements of the power connection or disconnection of the input end and the output end, while reducing the number of components, greatly reducing the product volume, and reducing the assembly cost. The tripping device disclosed in the present invention has a simple structure, is easy to implement, is suitable for automated production, and can be applied to various leakage protection devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features and advantages of the present disclosure will be better understood through the following optional embodiments described in detail in conjunction with the accompanying drawings, in which:

[0023] Figure 1 is a schematic diagram of the appearance of a trip device according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 Exploded diagram of the release device;

[0025] Figure 3 for Figure 1 Schematic diagram of the moving components of the middle trip device;

[0026] Figure 4 is a cross-sectional schematic diagram of a moving component in a trip device in a first position;

[0027] Figure 5 It is a cross-sectional schematic diagram of the reset button of the trip device when it is pressed down;

[0028] Figure 6It is a cross-sectional schematic diagram when the moving component in the tripping device is in the second position and the reset button and the reset spring tend to be reset;

[0029] Figure 7 Schematic cross-sectional view of the separation through the moving component for the adhesion of the moving electric contact and the electrostatic contact. DETAILED DESCRIPTION

[0030] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the present disclosure, and are not intended to limit the scope of the present disclosure. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0031] In this document, the terms "coupling", "attachment", "connection" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "coupling" or "attachment" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this document can be understood according to specific circumstances.

[0032] Herein, the terms "first", "second", etc. are not used to limit the order of precedence and the number of components unless otherwise specified.

[0033] The core unit in the existing leakage protection device integrates most of the components that provide leakage protection functions, including but not limited to reset function, tripping function, etc. With the increasing development of the automation industry and the diversification of application occasions, the design of the core unit tends to be modular and miniaturized. It has been realized that the miniaturized core unit has a weak breaking capacity due to its simple principle. When a short-circuit current occurs, it is easy to cause the current contacts to stick and fail to break, which brings major safety hazards. In addition, the existing products with strong breaking capacity mostly adopt the solution of normally closed contacts. This kind of solution is difficult to assemble and not easy to process.

[0034] Based on this, the present disclosure provides a tripping device for a leakage protection device based on a miniaturized design and having the ability to automatically break current. It should be understood that the leakage protection device applicable to the tripping device of the present disclosure includes but is not limited to a plug or a socket.

[0035] Combination Figure 1 and Figure 2As shown, a tripping device of an embodiment of the present disclosure mainly includes a control circuit board 10, a coil assembly 20, and a moving assembly 30, wherein the coil assembly 20 is coupled to the control circuit board 10 and includes at least a coil support 21 and an electrostatic contact 60 attached to the coil support. For example, the coil support may be provided with a positioning groove 25 for the electrostatic contact 60 to be embedded. The moving assembly 30 is attached with a moving contact arm 50, and the moving contact arm 50 is provided with a moving electric contact 52 corresponding to the electrostatic contact. In some embodiments, the tripping device also includes a transformer support 70, and the transformer support 70 is provided with a current transformer coupled to the control circuit board, and the current transformer is used to sense the leakage current and output a signal to the control circuit on the control circuit board 10. The moving contact arm 50 is fixed on the transformer support 70, for example, the transformer support 70 may be provided with a card slot 71 for the moving contact arm 50 to be embedded. In some embodiments, the trip device further includes a reset button 80, which is arranged adjacent to the coil assembly 20 and configured to drive the motion assembly 30 to move via the coil assembly 20. Advantageously, the components are assembled as a whole in a compact manner, and can then be conveniently assembled to the housing of the leakage protection device. In this way, the trip device can be assembled with different forms of housings or other additional components based on different requirements, thereby being suitable for automated mass production of leakage protection devices for various occasions.

[0036] It should be understood that the electrostatic contact 60 attached to the coil support and the moving contact arm 50 fixed to the transformer support 70 and attached to the moving component 30 are respectively an input component and an output component, which are not limited here.

[0037] According to the present disclosure, the moving assembly 30 is configured to be able to reciprocate between a first position and a second position relative to the coil assembly 20. In the first position, the moving electric contact 52 and the electrostatic contact 60 are disconnected to be in a disconnected state. In the second position, the moving contact arm 50 is elastically deformed by the moving assembly 30 and makes the moving electric contact 52 contact the electrostatic contact 60 to be in a closed state. In other words, when the moving assembly 30 is moved to the first position by a force of a specific direction and magnitude, the input member and the output member are driven accordingly to be close to each other in a closed state, thereby realizing electrical connection between the input end and the output end; conversely, when the moving assembly 30 is moved to the second position, the input member and the output member are driven to be away from each other in a disconnected state, thereby realizing electrical disconnection between the input end and the output end.

[0038] For the coil assembly 20, the combination Figure 2 and Figure 4The coil assembly 20 further includes an electromagnetic coil 22 and an iron core 23, wherein the electromagnetic coil 22 is sleeved outside the coil support 21, and the iron core 23 is arranged inside the coil support 21 and can reciprocate between the direction toward the moving component 30 and the direction away from the moving component 30. This reciprocating movement can be achieved, for example, by a reset button 80 and a reset spring 24, which is arranged between the coil support 21 and the iron core 23. Figure 4 As shown, a hollow winding post 212 may be provided at one end of the coil support 21, and the electromagnetic coil 22 is sleeved on the outside of the winding post 212. The iron core 23 is placed in the hollow inner cavity of the winding post 212, and the return spring 24 is sleeved on the outside of the iron core 23. Specifically, the iron core 23 has a head end 231 and a tail end 232. The head end 231 is provided with an outer flange 234, which abuts against one end of the return spring 24. The hollow inner cavity of the winding post 212 of the coil support 21 may be provided with an inner flange 211, which abuts against the other end of the return spring 24, that is, the return spring 24 is limited between the outer flange 234 of the iron core 23 and the inner flange 211 of the winding post 212. In this way, when the reset button 80 is pressed, the iron core 23 can be moved toward the direction of the moving component 30. When the reset button 80 is released, the return spring 24 provides a return force to return the iron core 23 to the direction away from the moving component 30.

[0039] The present disclosure advantageously sleeves the moving component 30 on the other end of the coil support 21, and enables the moving component 30 to reciprocate between the first position and the second position within a specific distance range along the axial direction of the winding column 212, thereby driving the moving contact arm 50 to move and contact or disconnect with the electrostatic contact 60.

[0040] Specific combination Figure 3As shown, in some embodiments, the moving assembly 30 is provided with a closing limiter 31, and the closing limiter 31 is configured to drive the moving contact arm 50 to elastically deform so that the moving electric contact 52 and the electrostatic contact 60 are in a closed state during the movement of the moving assembly 30 from the first position to the second position. Advantageously, the moving assembly 30 is also provided with a disconnection limiter 32, and the disconnection limiter 32 is configured to drive the moving contact arm 50 to elastically deform so that the moving electric contact 52 and the electrostatic contact 60 are in a disconnected state during the movement of the moving assembly 30 from the second position to the first position. In the embodiment shown, the closing limiter 31 and the disconnection limiter 32 are arranged relative to each other, and the moving contact arm 50 can be arranged in the limiter groove 33 between the closing limiter 31 and the disconnection limiter 32. In this way, the moving contact arm 50 can perform elastic swinging motion with the reciprocating movement of the moving assembly 30 under the action of the closing limiter 31 and the disconnecting limiter 32, thereby realizing the closing and disconnection of the moving electric contact and the electrostatic contact in a relatively small space, effectively ensuring a relatively stable closing state and disconnection state between the input member and the output member. Advantageously, the moving assembly 30 is made of insulating material, so as not to affect the power state between the input member and the output member.

[0041] In some embodiments, the closing limit portion 31 and the disconnecting limit portion 32 may be respectively provided with convex surfaces protruding in opposite directions, so as to facilitate driving the moving contact arm 50 during the movement process.

[0042] In certain embodiments, in combination Figure 2 and Figure 4 The movable contact arm 50 can be constructed to include a fixed section 53 coupled to the control circuit board 10 and a movable section 54 that is closed or disconnected with the electrostatic contact 60, wherein an inclined connecting section 51 is provided between the fixed section 53 and the movable section 54, and the connecting section 51 is arranged in the limiting groove 33. Accordingly, the limiting groove 33 can be constructed to be inclined relative to the moving direction of the moving component. This method further facilitates the elastic swinging movement of the movable contact arm 50.

[0043] Advantageously, the tripping device includes a pair of moving contact arms 50, the moving assembly 30 includes a pair of symmetrically arranged limit arms 34, each limit arm 34 is provided with a closing limit portion 31 and a disconnecting limit portion 32, and each moving contact arm 50 is arranged in a limit groove 33 between the corresponding closing limit portion 31 and the disconnecting limit portion 32. Correspondingly, the tripping device includes a pair of electrostatic contacts 60, each electrostatic contact 60 corresponds to a moving electric contact 52 of each moving contact arm 50.

[0044] The movement of the moving component 30 between the first position and the second position can be achieved, for example, by the magnetic attraction between the coil assembly 20 and the moving component 30. Specifically, the moving component 30 can be provided with a hollow portion 35, in which a permanent magnet 40 is fixed. When the moving component 30 and the coil assembly 20 are at a certain distance, the two can be combined together by the magnetic attraction between the iron core 23 and the permanent magnet 40, and then the movement of the coil assembly 20 drives the moving component 30 to move, specifically, drives the moving component 30 to move from the first position to the second position, so as to achieve the closure of the moving electric contact and the electrostatic contact. Advantageously, when the moving component 30 is in the second position, the magnetic attraction of the permanent magnet 40 on the iron core 23 is greater than the reset force of the reset spring 24.

[0045] In some embodiments, the polarity of the magnetic field of the permanent magnet 40 toward the iron core 23 is set to be the same as the polarity of the magnetic field generated by the iron core 23 toward the permanent magnet 40 after the electromagnetic coil 22 is connected to the current. That is, when the electromagnetic coil 22 is energized, the magnetic pole of the tail end 232 of the iron core 23 facing the permanent magnet 40 and the magnetic pole of the corresponding side of the permanent magnet 40 are mutually repelling, and then the moving component 30 can be driven to move from the second position to the first position through the mutual repulsion between the iron core 23 and the permanent magnet 40, so as to achieve the disconnection of the moving electric contact and the electrostatic contact.

[0046] The following combination Figures 5 to 7 The working principle and operation process of the tripping device disclosed in the present invention are described. Figure 5 The disconnected state or tripped state of the dynamic electric contact and the electrostatic contact is shown, and at this time, the moving component 30 is in the first position, which can also be called the initial position. Figure 6 The closed state or reset state of the dynamic electric contact and the electrostatic contact is shown, and the moving assembly 30 is in the second position. Figure 7 It shows the state where the moving electric contact and the electrostatic contact are disconnected by the disconnection limiter 32 of the moving component 30 when the moving electric contact and the electrostatic contact cannot be disconnected.

[0047] See first Figure 5 , under the action of the reset spring 24, the coil assembly 20 and the moving assembly 30 in the initial state of the tripping device are kept away from each other, the moving assembly 30 is in the first position, the inclined connection section 51 of the moving contact arm 50 abuts against the closed limit portion 31 of the moving assembly 30, and the moving electric contact 52 and the electrostatic contact 60 are in a disconnected state, and the power between the input and output ends is disconnected. When the reset button 80 is pressed as shown by the arrow, the reset button 80 pushes the iron core 23 to move downward and compresses the reset spring 24. When the iron core 23 is close enough to the permanent magnet 40 in the moving assembly 30, the tail end of the iron core 23 is adsorbed together with the permanent magnet 40. At this time, see Figure 6, release the reset button 80 as shown by the arrow, the iron core 23 and the permanent magnet 40 or the moving component 30 adsorbed thereon will move upward under the reset force of the reset spring 24, that is, move toward the second position of the moving component. During the movement, the closing limit portion 31 of the moving component 30 drives the connecting section 51 of the moving contact arm 50 abutting against it to perform elastic swinging motion until the moving electric contact 52 and the electrostatic contact 60 are in contact and closed. At this time, as described above, in the second position of the moving component 30, that is, the closed state of the moving electric contact 52 and the electrostatic contact 60, the magnetic attraction of the permanent magnet 40 on the iron core 23 is greater than the reset force of the reset spring 24, and the permanent magnet 40 and the iron core 23 will not separate, which effectively ensures the power connection between the input and output ends.

[0048] When the motion component 30 is in Figure 6 In the second position shown, if a specific current is passed through the electromagnetic coil 22 to generate a magnetic field in a specific direction, the tail end of the iron core 23 will have a magnetic field with the same polarity as the attraction surface of the permanent magnet 40. As described above, the polarity of the magnetic field of the permanent magnet 40 toward the side of the iron core 23 is set to be the same as the polarity of the magnetic field generated by the iron core 23 toward the side of the permanent magnet 40 after the electromagnetic coil 22 is connected to the current. Due to the mutual repulsion effect of magnets of the same polarity, the permanent magnet 40 drives the moving component 30 to move in the direction away from the iron core 23. At the same time, because the moving contact arm 50 loses the resistance force provided by the closing limit portion 31, the moving electric contact 52 is separated from the electrostatic contact 60 under the action of the moving contact arm 50's own rebound force, and the moving component 30 returns to the closed position. Figure 5 The initial first position shown realizes the automatic disconnection of the moving electric contact 52 and the electrostatic contact 60 .

[0049] In some cases, when the moving component 30 moves from the second position to the first position, due to some special reasons, the moving electric contact 52 and the electrostatic contact 60 are stuck together and cannot be quickly disconnected. Similarly, due to the repulsive force of the same polarity magnetic field of the iron core 23 and the permanent magnet 40, the moving component 30 will drive the moving electric contact 52 and the electrostatic contact 60 to separate through the friction between the disconnection limit portion 32 and the connecting section 51 of the moving contact arm 50 during the downward movement, thereby disconnecting the power between the input end and the output end, ensuring that the moving component 30 is restored to Figure 5 The initial first position shown also realizes the automatic disconnection of the moving electric contact 52 and the electrostatic contact 60 .

[0050] The trip device disclosed in the present invention effectively realizes the leakage protection functions of resetting and tripping with fewer components and a compact layout, and has the ability to automatically disconnect the current, effectively ensuring the functional requirements of power connection or disconnection between the input and output ends. It is simple to operate and has a miniaturized overall shape. It can be widely used as a modular product in various forms of leakage protection devices.

[0051] It should be understood here that the embodiments shown in the figures only show the optional shapes, sizes and arrangements of the various optional components of the tripping device of the leakage protection device according to the present disclosure, but they are only for illustration and not for limitation. Other shapes, sizes and arrangements may also be adopted without departing from the concept and scope of the present disclosure.

[0052] The technical content and technical features of the present disclosure have been disclosed above. However, it can be understood that under the creative ideas of the present disclosure, technicians in this field can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present disclosure. The description of the above implementation mode is illustrative rather than restrictive, and the protection scope of the present disclosure is determined by the claims.

Claims

1. A tripping device for providing leakage protection, characterized in that: The tripping device comprises: Control circuit board; A coil assembly coupled to the control circuit board and comprising at least a coil support and an electrostatic contact attached to the coil support; A moving assembly, the moving assembly being attached with a moving contact arm, the moving contact arm being provided with a moving electric contact corresponding to the electrostatic contact; Wherein, the moving component is configured to be able to reciprocate between a first position and a second position relative to the coil component, in which, in the first position, the moving electric contact and the electrostatic contact are disconnected to be in a disconnected state, and in the second position, the moving contact arm is driven by the moving component to elastically deform and make the moving electric contact contact with the electrostatic contact to be in a closed state.

2. The tripping device according to claim 1, characterized in that: The moving component is provided with a closing limit portion, and the closing limit portion is configured to drive the moving contact arm to elastically deform so that the moving electric contact and the electrostatic contact are in a closed state during the movement of the moving component from the first position to the second position.

3. The tripping device according to claim 2, characterized in that: The moving component is also provided with a disconnection limit portion, which is configured to drive the moving contact arm to elastically deform so that the moving electric contact and the electrostatic contact are in a disconnected state during the movement of the moving component from the second position to the first position.

4. The tripping device according to claim 3, characterized in that: The closing limit portion and the disconnecting limit portion are arranged opposite to each other, and the moving contact arm is arranged in a limit groove between the closing limit portion and the disconnecting limit portion.

5. The tripping device according to claim 4, characterized in that: The movable contact arm is constructed to include a fixed section coupled to the control circuit board and a movable section that closes or disconnects with the electrostatic contact, an inclined connecting section is provided between the fixed section and the movable section, and the connecting section is arranged in the limiting groove.

6. The tripping device according to claim 4, characterized in that: The closing limit portion and the breaking limit portion are respectively provided with convex surfaces protruding in opposite directions.

7. The tripping device according to claim 4, characterized in that: The tripping device includes a pair of moving contact arms, and the moving assembly includes a pair of symmetrically arranged limit arms, each of the limit arms is respectively provided with the closing limit portion and the disconnecting limit portion, and each of the moving contact arms is respectively arranged in a limit groove between the corresponding closing limit portion and the disconnecting limit portion; the tripping device includes a pair of electrostatic contacts, and each of the electrostatic contacts corresponds to the moving electric contact of each of the moving contact arms.

8. The tripping device according to any one of claims 1 to 7, characterized in that: The coil assembly further comprises an electromagnetic coil and an iron core. The electromagnetic coil is sleeved on the outside of the coil support. The iron core is arranged in the coil support and can reciprocate between a direction toward the moving component and a direction away from the moving component.

9. The tripping device according to claim 8, characterized in that: The tripping device further includes a reset spring, which is disposed between the coil support and the iron core and provides a reset force for restoring the iron core in a direction away from the moving component.

10. The tripping device according to claim 9, characterized in that: The moving component is provided with a hollow portion, in which a permanent magnet is fixedly arranged, and the permanent magnet is suitable for being adsorbed with the iron core.

11. The tripping device according to claim 10, characterized in that: When the moving component is in the second position, the magnetic attraction force of the permanent magnet on the iron core is greater than the restoring force of the restoring spring.

12. The tripping device according to claim 10, characterized in that: The polarity of the magnetic field of the permanent magnet toward the iron core is set to be the same as the polarity of the magnetic field generated by the iron core toward the permanent magnet after the electromagnetic coil is connected to current.

13. The tripping device according to any one of claims 1 to 7, characterized in that: The moving component is made of insulating material.

14. The tripping device according to claim 8, characterized in that: The tripping device further includes a reset button, which is arranged adjacent to the coil assembly and configured to drive the core of the coil assembly to move toward the moving assembly.

15. The tripping device according to any one of claims 1 to 7, characterized in that: The tripping device further comprises a transformer bracket, on which a current transformer coupled to the control circuit board is arranged, and the moving contact arm is fixedly arranged on the transformer bracket.

16. A leakage protection device, characterized in that: The leakage protection device comprises a tripping device according to any one of claims 1 to 15.

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