CN218101140U - Earth leakage protection assembly and earth leakage circuit breaker - Google Patents

Abstract

The embodiment of the application provides an electric leakage protection assembly and an electric leakage breaker, which comprise a circuit board and a mutual inductor; the circuit board is provided with a first connecting part and a support leg hole; the mutual inductor is arranged on the surface of the circuit board, the mutual inductor comprises a housing and an electromagnetic induction coil arranged in the housing, the electromagnetic induction coil is connected with a conductive supporting leg, the electromagnetic induction coil is electrically connected with the circuit board through the conductive supporting leg, the conductive supporting leg is arranged in the supporting leg hole, a second connecting part is arranged on the housing, and the second connecting part is connected with the first connecting part. The embodiment of the application realizes reliable electric connection of the mutual inductor and the circuit board through the conductive support leg and the support leg hole, shares part of pressure for the mechanical connection between the conductive support leg and the support leg hole through the reliable mechanical connection of the first connecting part and the second connecting part, can reduce the possibility of failure of the mechanical connection between the conductive support leg and the circuit board, further can ensure the reliability of electric connection between the conductive support leg and the circuit board, and ensures the stability of electric signal transmission between the mutual inductor and the circuit board.

Description

Earth leakage protection assembly and earth leakage circuit breaker

Technical Field

The application relates to the technical field of electrical elements, in particular to an electric leakage protection assembly of an electric leakage circuit breaker and the electric leakage circuit breaker.

Background

The leakage protection assembly in the leakage circuit breaker is used for driving a moving contact and a fixed contact of the leakage circuit breaker to be separated so as to cut off a power supply when faults such as personal electric shock, fire, line aging and the like occur. The leakage protection assembly comprises a mutual inductor and a circuit board, and the reliability of electric connection between the mutual inductor and the circuit board of the existing leakage protection assembly is low.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide an earth leakage protection assembly and an earth leakage breaker, which overcome or at least partially solve the above problems.

The embodiment of the application provides a leakage protection assembly, which comprises a circuit board and a mutual inductor; the circuit board is provided with a first connecting part and a support leg hole; on the face of circuit board was located to the mutual-inductor, the mutual-inductor included the housing and installed the electromagnetic induction coil in the housing, and the electromagnetic induction coil is connected electrically conductive stabilizer blade, and the electromagnetic induction coil is connected through electrically conductive stabilizer blade and circuit board electricity, and electrically conductive stabilizer blade setting is equipped with the second connecting portion on the housing in the stabilizer blade hole, and the second connecting portion are connected with first connecting portion.

By adopting the scheme, the conductive support legs are arranged in the support leg holes on the circuit board, so that the mutual inductor is electrically connected with the circuit board, and the mechanical connection reliability of the mutual inductor and the circuit board is improved to a certain extent due to the higher rigidity of the conductive support legs, so that the electrical connection reliability of the mutual inductor and the circuit board is improved; the connection of the first connecting part and the second connecting part shares a part of pressure for the mechanical connection between the conductive support leg and the support leg hole, so that the possibility of failure of the mechanical connection between the conductive support leg and the circuit board can be reduced, the reliability of the electrical connection between the conductive support leg and the circuit board can be further ensured, and the stability of the electrical signal transmission between the mutual inductor and the circuit board can be ensured. In addition, electrically conductive stabilizer blade and stabilizer blade hole assembling process is simple in this embodiment, is favorable to improving the assembly efficiency of earth leakage protection subassembly.

In some embodiments, the first connection portion is a mounting hole and the second connection portion is a mounting pin; or the first connecting part is a mounting pin, and the second connecting part is a mounting hole; the mounting pin is arranged in the mounting hole.

By adopting the scheme, the structure of the mounting hole and the mounting pin is simple, and the assembling process is convenient and efficient, so that the circuit board and the housing are simple in structure and convenient to process and manufacture, and the assembling efficiency between the mutual inductor and the circuit board is improved.

In some embodiments, the housing is provided with a connecting hole, and the conductive support leg is in interference fit with the connecting hole.

Through adopting above-mentioned scheme, can guarantee to electrically conduct between stabilizer blade and the housing relative static and be connected, prevent that electrically conductive stabilizer blade from deviating from the connecting hole, and then guaranteed mechanical connection's between mutual-inductor and the circuit board reliable.

In some embodiments, the conductive support legs include a first support leg and a second support leg, and two ends of the electromagnetic induction coil are respectively wound on the first support leg and the second support leg and are respectively connected with the first support leg and the second support leg in a welding manner.

By adopting the scheme, the electromagnetic induction coil is not easy to separate from the conductive support legs, and the reliability of connection between the electromagnetic induction coil and the conductive support legs is ensured.

In some embodiments, a line connecting the second connecting portion, the first leg and the second leg forms a triangle.

By adopting the scheme, the triangle has stability, and the relative position of the mutual inductor and the circuit board can be ensured to be stable.

In some embodiments, a mounting gap is provided between the cover and the circuit board to accommodate the electromagnetic coil.

By adopting the scheme, the installation space can be reserved for the electromagnetic induction coil stack in the installation gap, so that the structural layout of the leakage protection assembly is more reasonable.

In some embodiments, the end face of the cover shell close to one side of the circuit board is contacted with the board surface of the circuit board; one side of the housing, which is close to the circuit board, is provided with a notch, the part of the conductive leg is positioned in the notch, and the notch is used for forming a mounting gap between the housing and the circuit board.

Through adopting above-mentioned scheme, the electromagnetic induction coil of winding on electrically conductive stabilizer blade is held in the breach, and the size that housing and circuit board are together is less in the thickness direction of circuit board, and earth leakage protection subassembly overall arrangement is compact, the volume is less, is favorable to reducing the volume of earth leakage protection subassembly.

In some embodiments, the cover and the second connecting portion are of unitary construction.

By adopting the scheme, the structure of the housing and the second connecting piece is simple, the structure is reliable and stable, the assembly is not needed between the housing and the second connecting piece, and the assembly efficiency of the leakage protection assembly is improved.

The embodiment of the application also provides a residual current circuit breaker, which comprises a tripping executive component and the residual current protection component in any embodiment of the subject, wherein the mutual inductor is used for detecting the residual current and transmitting the residual current to the circuit board; the circuit board is used for transmitting leakage current to an external controller, and the controller judges whether the breaker is required to be opened or not; and the tripping executing piece is used for executing tripping action under the control of the controller so as to open the circuit breaker.

By adopting the scheme, the electric leakage circuit breaker has stable working performance, long service life and compact layout, and is more suitable for the miniaturization development of the electric leakage circuit breaker.

Compared with the prior art, the beneficial effects of this application are as follows:

1) In the application, the support leg holes on the circuit board are formed through the conductive support legs, so that the mutual inductor is electrically connected with the circuit board, and the mechanical connection reliability of the mutual inductor and the circuit board is improved to a certain extent due to the higher rigidity of the conductive support legs, so that the electrical connection reliability of the mutual inductor and the circuit board is improved; the connection of the first connecting part and the second connecting part shares a part of physical connection pressure for mechanical connection between the conductive support leg and the support leg hole, so that the possibility of failure of mechanical connection between the conductive support leg and the circuit board can be reduced, the reliability of electrical connection between the conductive support leg and the circuit board can be further ensured, and the stability of electrical signal transmission between the mutual inductor and the circuit board can be ensured.

2) The electrically conductive stabilizer blade is simple with stabilizer blade hole assembling process in this real application, is favorable to improving the assembly efficiency of earth leakage protection subassembly.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and in order that the technical means of the embodiments of the present application can be clearly understood, the embodiments of the present application are specifically described below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is an exploded view of a leakage protection device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a leakage protection device according to an embodiment of the present disclosure.

Description of the drawings: 1-circuit board, 11-pin hole, 12-first connecting part, 2-mutual inductor, 21-cover shell, 211-connecting hole, 22-second connecting part, 23-annular magnetic core, 24-conductive pin, 241-first pin, 242-second pin and a-notch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The directional terms appearing in the following description are directions shown in the drawings, and do not limit the specific structures of the earth leakage protection assembly and the earth leakage breaker of the present application. For example, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application.

Further, expressions of directions of indication such as X direction, Y direction, and Z direction for explaining the operation and construction of each member of the earth leakage protection assembly and the earth leakage breaker of the present embodiment are not absolute but relative, and although these indications are appropriate when each member of the battery pack is in the position shown in the drawings, when the position is changed, the directions should be interpreted differently to correspond to the change.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, for example, the mechanical structures "connected" or "connected" may refer to physical connections, for example, the physical connections may be fixed connections, for example, fixed connections by fasteners, such as screws, bolts or other fasteners; the physical connection can also be a detachable connection, such as a mutual snap-fit or snap-fit connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "coupling" of circuit structures may mean not only physical coupling but also electrical or signal coupling, for example, direct coupling, i.e., physical coupling, or indirect coupling via at least one element therebetween, as long as electrical communication is achieved, or communication between the two elements; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The leakage protection assembly in the leakage circuit breaker is used for driving a moving contact and a fixed contact of the leakage circuit breaker to be separated so as to cut off a power supply when faults such as personal electric shock, fire, line aging and the like occur. The leakage protection assembly comprises a mutual inductor and a circuit board. In the prior art, the mutual inductor and the circuit board in the leakage protection assembly are electrically connected through flexible lead soldering, in the connection mode, the lead is easily broken from a welding position, so that the connection between the mutual inductor and the circuit board is unreliable, the lead needs to be repeatedly carded and shaped in the assembly process, the wiring and assembly process is complex, and the electric connection is easily failed due to wrong lead connection.

In view of this, a first aspect of the embodiments of the present application provides a leakage protection component, which includes a circuit board 1 and a transformer 2; the circuit board 1 is provided with a first connecting part 12 and a support leg hole 11; on mutual-inductor 2 located circuit board 1's face, mutual-inductor 2 includes housing 21 and installs the electromagnetic induction coil in housing 21, and electromagnetic induction coil connects electrically conductive stabilizer blade 24, and electromagnetic induction coil is connected through electrically conductive stabilizer blade 24 and 1 electricity of circuit board, and electrically conductive stabilizer blade 24 sets up in stabilizer blade hole 11, is equipped with second connecting portion 22 on the housing 21, and second connecting portion 22 is connected with first connecting portion 21.

The surface of the wiring board 1 refers to any one of the surfaces of the wiring board 1 in the thickness direction thereof, and is one of the side surfaces of the wiring board 1 having the largest area.

It should be noted that the sensor 2 is a current transformer, and plays a role in detecting leakage current in the circuit breaker, and the controller of the leakage circuit breaker controls opening of the circuit breaker according to the leakage current, so as to implement a leakage protection function of the leakage circuit breaker.

The conductive pins 24 are disposed in the pin holes 11, which means that the conductive pins 24 are mounted in the pin holes 11 and electrically connected to the corresponding conductive structures on the circuit board 1.

The pin hole 11 may be a through hole along the thickness direction of the circuit board 1, and the length of the conductive pin 24 may be slightly larger than the thickness of the circuit board 1. Thus, the conductive leg 24 can pass completely through the leg hole 11, and thus cannot easily slip out of the leg hole 11.

In some embodiments, the connection between the conductive leg 24 and the leg hole 11 may be: the conductive pins 24 are fixed to the circuit board 1 by soldering on the back surface of the circuit board 1 after passing through the pin holes 11.

The housing 21 may be an annular hollow shell, and is generally made of an insulating material, and is used for accommodating the electromagnetic induction coil and other internal structural components, protecting the internal structural components, and insulating the internal structural components from the external environment.

The connection between the first connection portion 12 and the second connection portion 22 is a mechanical connection, i.e. a physical connection. In some embodiments, the first connection portion 12 and the second connection portion 22 may be both solid pieces, such as the first connection portion 12 and the second connection portion 22 are snap-fit structures; in other embodiments, one of the first connecting portion 12 or the second connecting portion 22 may be a solid structure, and the other of the second connecting portion 22 or the first connecting portion 12 is a dummy structure such as a hole or a cavity adapted to the solid structure, for example, the first connecting portion 12 and the second connecting portion 22 are pin-hole matching structures.

The electromagnetic induction coil may be a coil wound around the toroidal core 23, which is mounted in the housing 21 together with the toroidal core 23; the electromagnetic coil may be selected to be a copper wire because the copper wire has a low resistance and generates less heat.

The purpose of connecting the conductive support leg 24 with the electromagnetic induction coil is to electrically connect the conductive support leg 24 with the electromagnetic induction coil, so the conductive support leg 24 is made of conductive material, and the specific connection mode between the conductive support leg and the electromagnetic induction coil can be that the two ends of the electromagnetic induction coil are directly welded to the conductive support leg 24, or the two ends of the electromagnetic induction coil are welded to the conductive support leg 24 after being wound on the conductive support leg 24.

The conductive support legs 24 are arranged in the support leg holes 11 on the circuit board 1, so that the mutual inductor 2 is electrically connected with the circuit board 1, and the mechanical connection reliability of the mutual inductor 2 and the circuit board 1 is improved to a certain extent due to the higher rigidity of the conductive support legs 24, so that the electrical connection reliability of the mutual inductor 2 and the circuit board 1 is improved; in other words, in the present embodiment, if the mechanical connection between the conductive leg 24 and the circuit board 1 is reliable, the reliable electrical connection between the transformer 2 and the circuit board 1 can be ensured; however, in some special cases, for example, the leakage protection component moves due to unstable working environment, long-distance transportation, and the like, such as bumping, shaking, or rotation, the conductive support leg 24 is easily damaged, and even the mechanical connection between the conductive support leg 24 and the support leg hole 11 of the circuit board 1 fails, in this case, the electrical connection between the transformer 2 and the circuit board 1 is unreliable; in this embodiment, the connection between the first connection portion 12 and the second connection portion 22 shares a part of pressure for the mechanical connection between the conductive support leg 24 and the support leg hole 11, so that the possibility of failure of the mechanical connection between the conductive support leg 24 and the circuit board 1 can be reduced, the reliability of the electrical connection between the conductive support leg 24 and the circuit board 1 can be ensured, and the stability of the electrical signal transmission between the transformer 2 and the circuit board 1 can be ensured. In addition, in this embodiment, the assembly process of the conductive supporting leg 24 and the supporting leg hole 11 is simple, which is beneficial to improving the assembly efficiency of the earth leakage protection component.

As shown in fig. 1, in some embodiments, the first connection portion 12 is a mounting hole and the second connection portion 22 is a mounting pin; alternatively, the first connecting portion 12 is a mounting pin, and the second connecting portion 22 is a mounting hole; the mounting pin is arranged in the mounting hole.

The mounting hole can be blind hole or through-hole, wherein, for guaranteeing that the mounting pin is difficult for deviating from the mounting hole, the mounting hole can set up to the through-hole, and the mounting pin runs through the mounting hole and installs.

The mounting pins can be mounted in the mounting holes in a clearance fit manner, so that when the mutual inductor 2 and the circuit board 1 are assembled, the mounting holes are firstly connected with the mounting pins in a fit manner, and then the conductive supporting legs 24 correspond to the supporting leg holes 11 by rotating the housing 21, so that rapid assembly is completed; the whole assembly process is simple and efficient, and assembly production of the leakage protection assembly line is facilitated. The mounting pin also can adopt interference fit's mode to install in the mounting hole, like this, can make mechanical connection intensity higher between mutual-inductor 2 and the circuit board 1, the relative position of mutual-inductor 2 and circuit board 1 is stable, and difficult emergence is deflected and is removed between the two, and first connecting portion 12 and second connecting portion 22 can ensure reliable mechanical connection between mutual-inductor 2 and the circuit board 1, further improve reliable electricity between mutual-inductor 2 and the circuit board 1 and connect. Of course, the mounting pin can also be installed in the mounting hole in a transition fit mode, so that in the assembling process of the mutual inductor 2 and the circuit board 1, the assembly can be completed without adopting a large acting force, and the connection mode can be better disassembled relative to the interference fit connection, in addition, the mutual inductor 2 is accurately positioned on the circuit board 1, the position is relatively static, and the stability of mechanical connection between the mutual inductor 2 and the circuit board can also be ensured.

The mounting hole and the mounting pin are a simple mechanical connection structure, the manufacturing process is simple, the connection is reliable, and the structures of the circuit board 1 and the housing 21 are simpler and are convenient to process and manufacture; and the assembling process of the mounting hole and the mounting pin is convenient and efficient, so that the assembling efficiency between the mutual inductor 2 and the circuit board 1 can be improved.

As shown in fig. 2, in some embodiments, the housing 21 is provided with a connection hole 211, and the conductive leg 24 is in interference fit with the connection hole 211.

The cross-sectional shape of the conductive leg 24 and the cross-sectional shape of the connection hole 211 may be different, for example, the cross-sectional shape of the conductive leg 24 may be square, the cross-sectional shape of the connection hole 211 may be circular, and the side edges of the conductive leg 24 and the inner wall surface of the connection hole 211 are in line contact, which has the advantage of labor saving in assembly; the cross-sectional shape of the conductive leg 24 and the cross-sectional shape of the connection hole 211 may be the same or similar, for example, the cross-sectional shapes of the connection hole 211 and the conductive leg 24 are both circular, so that the conductive leg 24 and the inner wall surface of the connection hole 211 are in surface contact, the contact surface is large, and the assembly is tight.

In order to save the electromagnetic induction coil, the connection hole 211 can be arranged at a position close to the electromagnetic induction coil, so that the conductive support leg 24 is closer to the electromagnetic induction coil, the coil end part of the electromagnetic induction coil does not need to span too far, the waste of the electromagnetic induction coil is avoided, and the production cost of the leakage protection assembly is reduced.

The interference fit between the conductive support leg 24 and the connection hole 211 can ensure the relatively static connection between the conductive support leg 24 and the housing 21, prevent the conductive support leg 24 from coming out of the connection hole 211, and further ensure the reliability of the mechanical connection between the transformer 2 and the circuit board 1.

In some embodiments, as shown in fig. 1, the conductive leg 24 includes a first leg 241 and a second leg 242, and two ends of the electromagnetic induction coil are respectively wound on the first leg 241 and the second leg 242 and are respectively connected to the first leg 241 and the second leg 242 by soldering.

In order to ensure the connection reliability between the electromagnetic induction coil and the conductive support leg 24, the end of the electromagnetic induction coil may be spot-welded to the conductive support leg 24 after being wound on the outer surface of the conductive support leg 24 for a certain distance along the axial direction of the conductive support leg 24, or spot-welded to a plurality of places on the conductive support leg 24 along the conductive support leg 24 around which the electromagnetic induction coil is wound.

By adopting the scheme, the electromagnetic induction coil is not easy to separate from the conductive support leg 24, and the reliability of connection between the electromagnetic induction coil and the conductive support leg 24 is ensured.

In some embodiments, a line connecting the second connecting portion 22, the first leg 241, and the second leg 242 forms a triangle.

The second connecting portion 22 may be disposed on a center line between the first leg 241 and the second leg 242, such that a triangle formed by the first leg 241 and the second leg 242 is an isosceles triangle; the second connecting portion 22 may be disposed at other positions of the housing 21 as long as the positional relationship between the second connecting portion and the first and second legs 241 and 242 is triangular.

By adopting the scheme, the triangle has stability, and the relative position of the mutual inductor 2 and the circuit board 1 can be ensured to be stable.

In some embodiments, there is a mounting gap between the cover 21 and the wiring board 1 to accommodate the electromagnetic coil.

If the both ends winding of electromagnetic induction coil is on electrically conductive stabilizer blade 24, the electromagnetic induction coil can accumulate the coil stack of certain volume gradually at electrically conductive stabilizer blade 24's peripheral surface, and in this embodiment, the installation space can be reserved for this coil stack to the installation clearance for the structural layout of earth leakage protection subassembly is more reasonable.

As shown in fig. 3, in some embodiments, the end face of the cover 21 near the side of the circuit board 1 contacts the board face of the circuit board 1; the side of the cover 21 close to the circuit board 1 is provided with a gap a, and the conductive leg 24 is partially located in the gap a, and the gap a is used for forming a mounting gap between the cover 21 and the circuit board 1.

The first leg 241 and the second leg 242 extend from the housing 21, and are installed in the leg hole 11 of the circuit board 1 after passing through the gap a, two ends of the electromagnetic induction coil are respectively wound on the first leg 241 and the second leg 242, and a coil stack with a certain volume is accumulated on the first leg 241 and the second leg 242, and in some embodiments, in order to ensure reliable connection of the electromagnetic induction coil and the conductive leg 24, the electromagnetic induction coil is also welded to the conductive leg 24, so that the coil stack (or the coil stack and the welding point) is accommodated in the gap a; the end surface (except the notch a) of the cover shell 21 close to one side of the circuit board 1 can be attached to the surface of the circuit board 1; in the thickness direction of the circuit board 1, the size of the housing 21 and the circuit board 1 is small, the layout of the leakage protection assembly is compact, the size is small, and the reduction of the size of the leakage protection assembly is facilitated.

In some embodiments, the cover 21 and the second connecting portion 22 are an integrally molded structure.

The housing 21 and the second connecting portion 22 may be both made of plastic materials with certain strength, and therefore the housing 21 and the second connecting portion 22 are formed into an integral part through an injection molding process, so that the housing 21 and the second connecting member 22 have simple and reliable and stable structures, and do not need to be assembled therebetween, thereby improving the assembly efficiency of the earth leakage protection assembly.

Another aspect of the embodiments of the present application provides an electrical leakage breaker, including a trip actuator and the electrical leakage protection assembly of any of the foregoing embodiments. The mutual inductor 2 is used for detecting leakage current and transmitting the leakage current to the circuit board 1; the circuit board 1 is used for transmitting leakage current to an external controller, and the controller judges whether the breaker is required to be opened or not; the tripping executing piece is used for executing tripping action under the control of the controller so as to open the circuit breaker.

Since the structure and the beneficial effects of the earth leakage protection assembly in the circuit breaker have been described in detail in the foregoing embodiments, they are not described herein again.

Adopt the earth leakage circuit breaker working property of earth leakage protection subassembly in above-mentioned embodiment stable, longe-lived, reasonable layout, more adapt to earth leakage circuit breaker's miniaturized development.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (10)

1. An earth leakage protection assembly, comprising: comprises that

The circuit board is provided with a first connecting part and a support leg hole;

the mutual inductor is arranged on the surface of the circuit board, the mutual inductor comprises a housing and an electromagnetic induction coil arranged in the housing, the electromagnetic induction coil is connected with conductive support legs, the electromagnetic induction coil passes through the conductive support legs and the circuit board are electrically connected, the conductive support legs are arranged in the support leg holes, second connecting parts are arranged on the housing, and the second connecting parts are connected with the first connecting parts.

2. A residual current device as claimed in claim 1, characterized in that: the first connecting part is a mounting hole, and the second connecting part is a mounting pin; or the first connecting part is a mounting pin, and the second connecting part is a mounting hole; the mounting pin is arranged in the mounting hole.

3. A residual current device as claimed in claim 1, characterized in that: the shell is provided with a connecting hole, and the conductive support leg is in interference fit with the connecting hole.

4. A residual current device as claimed in claim 1, characterized in that: the supporting pin holes are through holes, and the conductive supporting pins penetrate through the circuit board from the supporting pin holes and are fixedly connected with the circuit board through soldering.

5. A residual current device as claimed in claim 1, characterized in that: the conductive support leg comprises a first support leg and a second support leg, and two ends of the electromagnetic induction coil are wound on the first support leg and the second support leg respectively and are connected with the first support leg and the second support leg in a welded mode respectively.

6. A residual current device as claimed in claim 5, characterized in that: the connecting lines among the second connecting part, the first supporting leg and the second supporting leg form a triangle.

7. A residual current device as claimed in claim 1, characterized in that: and a mounting gap is arranged between the housing and the circuit board so as to accommodate the electromagnetic induction coil.

8. A residual current device as claimed in claim 7, characterized in that: the end face of one side of the housing, which is close to the circuit board, is contacted with the board surface of the circuit board; the cover shell is provided with a notch at one side close to the circuit board, the conductive leg part is positioned at the notch, and the notch is used for enabling the cover shell and the circuit board to form the mounting gap.

9. A residual current device as claimed in claim 1, characterized in that: the housing and the second connecting part are of an integrally formed structure.

10. An earth leakage circuit breaker, characterized in that: comprises that

The earth leakage protection assembly of any one of claims 1-8, said transformer being adapted to detect an earth leakage current and to transmit the earth leakage current to said circuit board; the circuit board is used for transmitting the leakage current to an external controller, and the controller judges whether the breaker is required to be opened or not;

and the tripping executing piece is used for executing tripping action under the control of the controller so as to open the circuit breaker.

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