CN218513399U - Residual current circuit breaker - Google Patents

Abstract

The embodiment of the application provides a residual current circuit breaker, and belongs to the technical field of electrical equipment. The residual current circuit breaker comprises a circuit board and a conductive assembly. The circuit board is provided with a via hole, and the N-pole conductive piece in the conductive assembly is of an integrated structure. The conductive component penetrates through the via hole, the N-pole conductive piece and the L-pole conductive piece are both sleeved with an insulating piece, and at least part of the insulating piece is located between the hole wall of the via hole, the N-pole conductive piece and the L-pole conductive piece. The electric leakage circuit breaker provided by the embodiment of the application has high performance stability, and the use safety of the electric leakage circuit breaker can be improved.

Description

Residual current circuit breaker

Technical Field

The embodiment of the application relates to the technical field of electrical equipment, in particular to a residual current circuit breaker.

Background

The leakage breaker is a switch which can automatically act when the leakage current in the circuit exceeds a preset value, and can connect, bear and break the current under the normal circuit condition, and can also connect and break the current under the specified abnormal condition (such as overload, short circuit and the like). The cable is widely applied to various levels of outgoing lines and terminal systems of power distribution systems in the fields of industry, building, water conservancy and hydropower and the like.

When the performance of the earth leakage breaker is unstable, the safe use of the breaker is impaired, and therefore, it is necessary to improve the performance stability of the earth leakage breaker.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the embodiment of the present application provides an electrical leakage breaker, which can improve the performance stability of the electrical leakage breaker, thereby improving the safety of the electrical leakage breaker.

In a first aspect of the embodiments of the present application, there is provided an electrical leakage breaker, which includes a circuit board and a conductive component. The circuit board is provided with a via hole, the conductive component comprises an N-pole conductive piece and an L-pole conductive piece, and the N-pole conductive piece is of an integrated structure. The conductive component penetrates through the via hole, the N-pole conductive piece and the L-pole conductive piece are both sleeved with an insulating piece, and at least part of the insulating piece is located between the hole wall of the via hole, the N-pole conductive piece and the L-pole conductive piece.

Through setting up electrically conductive the piece into integral structure with the N utmost point, not only can save the equipment process that electrically conductive the piece is extremely, improve electric leakage circuit breaker's packaging efficiency, can also save welding cost, and can avoid making extremely electrically conductive the piece to generate heat when using or even cause the condition emergence of power consumption safety because of welding quality is not good, can also reduce extremely electrically conductive the probability of taking place the deformation extremely, improve the electrically conductive reliability of being connected with other structures of extremely electrically conductive, thereby improve electric leakage circuit breaker's performance stability. In addition, the insulating parts are sleeved on the N-pole conductive part and the L-pole conductive part, so that the insulating parts positioned in the via holes of the circuit board can isolate the N-pole conductive part, the L-pole conductive part and the circuit board, the creepage distance among electronic devices with insulation requirements on the N-pole conductive part, the L-pole conductive part and the circuit board is increased, the electrical insulation among the N-pole conductive part, the L-pole conductive part and the electronic devices is improved, the possibility of electrical breakdown between the N-pole conductive part and the L-pole conductive part and the electronic devices is reduced, and the use safety of the leakage circuit breaker is improved.

In some embodiments, the N-pole conductive member includes a first conductive plate, a second conductive plate, and a third conductive plate connected in sequence, each of the first conductive plate and the third conductive plate has a non-zero included angle with the second conductive plate, and the insulating member is sleeved on the second conductive plate.

Through the scheme, the N-pole conductive piece is set to be multi-section, the insulating piece is sleeved on the second conductive plate, and therefore the two ends of the insulating piece can be limited by the first conductive plate and the third conductive plate, the possibility that the insulating piece moves relative to the N-pole conductive piece can be reduced, or the amplitude of the insulating piece moving relative to the N-pole conductive piece can be reduced, so that the possibility that the insulating piece moves out from the hole wall of the via hole and the N-pole conductive piece can be reduced, and the effect of insulating a circuit board and the N-pole conductive piece of the insulating piece is improved. In addition, the N-pole conductive piece is set to be of a multi-section type, the position of the insulating piece is limited through the first conductive plate and the third conductive plate, other structural parts do not need to be additionally arranged for limiting, and the structure of the residual current circuit breaker is simplified.

In some embodiments, a side of the third conductive plate, which is far away from the first conductive plate, is integrally provided with a protrusion configured as a stationary contact of the earth leakage breaker.

Through the scheme, the assembling process of the static contact and the N-pole conductive piece can be saved, so that the assembling efficiency of the leakage circuit breaker is improved conveniently. In addition, the welding cost of the static contact and the N-pole conductive piece can be saved, the influence on the reliability of the electric connection of the static contact and the N-pole conductive piece due to poor welding quality is avoided, and the use safety of the residual current circuit breaker can be improved.

In some embodiments, the outer circumferential peripheries of the N-pole conductive member and the L-pole conductive member are each covered with an insulating member.

Through the scheme, the outer peripheral surfaces of the N-pole conductive piece and the L-pole conductive piece are coated by the insulating pieces, so that the electric insulativity between each part of the outer peripheral surfaces of the N-pole conductive piece and the L-pole conductive piece and the electronic device can be improved.

In some embodiments, the two end faces of the insulating member are flush with the two board faces of the circuit board respectively.

By the scheme, the outer layers of the N-pole conductive piece and the L-pole conductive piece in the via hole are covered by the insulating piece conveniently, so that the circuit board, the N-pole conductive piece and the L-pole conductive piece in the via hole can be effectively isolated, and the possibility of electric breakdown caused by mutual electric connection of the electronic device, the N-pole conductive piece and the L-pole conductive piece is reduced.

In some embodiments, one end of the insulator is flush with one face of the circuit board and the other end extends beyond the circuit board. Or both ends of the insulating part exceed the circuit board.

Through the scheme, the outer layers of the N-pole conductive piece and the L-pole conductive piece in the via hole are covered by the insulating piece, so that the electrical insulation between the N-pole conductive piece, the L-pole conductive piece and the electronic device is improved. In addition, the insulating part beyond the circuit board can also enable the outer layers of the N-pole conductive part and the L-pole conductive part outside the via hole to be covered by the insulating part, so that the N-pole conductive part and the L-pole conductive part in the via hole are effectively isolated, the possibility of electric breakdown and even electric connection between the electronic device and the conductive component is reduced, and meanwhile, the adjacent N-pole conductive part and the adjacent L-pole conductive part can be isolated, so that the possibility of electric breakdown and even electric connection between the adjacent N-pole conductive part and the L-pole conductive part is reduced.

In some embodiments, the insulator is a heat shrink tube.

Through establish the pyrocondensation pipe on N utmost point electrically conductive piece and L utmost point electrically conductive piece, the pyrocondensation pipe can contract after the heating, is convenient for paste N utmost point electrically conductive piece and L utmost point electrically conductive piece tightly, is difficult to take place the position removal on N utmost point electrically conductive piece and L utmost point, is convenient for restrict the position of pyrocondensation pipe between circuit board, N utmost point electrically conductive piece and L utmost point electrically conductive piece consequently to fine isolated circuit board, N utmost point electrically conductive piece and L utmost point electrically conductive piece play insulating, prevent the effect of puncturing.

In some embodiments, the N-pole conductive member is provided with a limiting structure for limiting the position of the insulating member on the N-pole conductive member.

Through the scheme, the position of the insulating part can be limited through the limiting structure, so that the insulating part can play a role in isolating the circuit board, the N-pole conductive part and the L-pole conductive part.

In some embodiments, the position-limiting structure includes a first position-limiting portion and a second position-limiting portion arranged along a first direction, the insulating member is located between the first position-limiting portion and the second position-limiting portion, and the first direction is a direction in which the N-pole conductive member passes through the circuit board.

Through the scheme, the two ends of the insulating part are respectively provided with the limiting parts, so that the position of the insulating part can be limited from the two ends of the insulating part, the possibility that the insulating part moves out from the hole wall of the via hole and the circuit board is reduced, and the effects of isolating the circuit board from the insulating part, the N-pole conductive piece and the L-pole conductive piece can be improved.

In some embodiments, the N-pole conductive member is provided with a groove near a side wall of the circuit board, the insulating member is located in the groove, the groove has a first groove wall and a second groove wall opposite to each other along the first direction, the first groove wall is configured as a first position-limiting portion, and the second groove wall is configured as a second position-limiting portion.

The first groove wall of the groove is used as the first limiting part, the second groove wall of the groove is used as the second limiting part, the first groove wall and the second groove wall of the groove can limit the position of the insulating part from two ends of the insulating part, the possibility that the insulating part moves out from the hole wall of the via hole and the circuit board is reduced, and the effect of insulating the circuit board, the N-pole conductive piece and the L-pole conductive piece of the insulating part can be improved.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided 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 without creative efforts.

Fig. 1 is a schematic structural diagram of an electrical leakage breaker according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a positional relationship among an N-pole conductive component, an insulating component, and a circuit board according to an embodiment of the present disclosure.

Fig. 3 is a cross-sectional view of an N-pole conductive member, an insulating member, and a circuit board according to an embodiment of the present application.

Fig. 4 is a cross-sectional view of another N-pole conductive member, an insulating member, and a circuit board according to an embodiment of the present application.

Fig. 5 is a cross-sectional view of another N-pole conductive member, an insulating member, and a circuit board according to an embodiment of the present application.

Fig. 6 is a schematic view of a limiting structure according to an embodiment of the present application.

Description of the reference numerals:

1. a circuit board; 11. a via hole; 12. a first board surface; 13. a second board surface; 2. a conductive component; 21. an N-pole conductive member; 22. an L-pole conductive member; 23. a first conductive plate; 24. a second conductive plate; 25. a third conductive plate; 251. a protrusion; 3. an insulating member; 31. a first end; 32. a second end; 4. a mutual inductor; 5. a limiting structure; 51. a first limiting part; 52. a second limiting part; 6. a release; x, the length direction of the residual current circuit breaker; y, the width direction of the leakage breaker; z, height direction of the earth leakage breaker.

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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 figures are intended to cover non-exclusive inclusions.

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 directional terms appearing in the following description are directions shown in the drawings, and do not limit the specific structure of the circuit breaker of the present application. For example, in the description of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Further, expressions of directions indicated such as an X direction, a Y direction, and a Z direction for explaining the operation and configuration of each member of the circuit breaker of the present embodiment are not absolute but relative, and although these indications are appropriate when each member of the circuit breaker 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping 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.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electrical leakage breaker provided in an embodiment of the present application, and fig. 2 is a schematic positional relationship diagram of a conductive assembly 2, an insulating member 3, and a circuit board 1 provided in an embodiment of the present application, and as shown in fig. 1 and fig. 2, the electrical leakage breaker includes a circuit board 1 and a conductive assembly 2. The circuit board 1 is provided with a via hole 11, the conductive component 2 comprises an N-pole conductive piece 21 and an L-pole conductive piece 22, and the N-pole conductive piece 21 is of an integrated structure. The conductive component 2 penetrates through the via hole 11, the N-pole conductive piece 21 and the L-pole conductive piece 22 are sleeved with the insulating piece 3, and at least part of the insulating piece 3 is positioned between the hole wall of the via hole 11, the N-pole conductive piece 21 and the L-pole conductive piece 22.

The earth leakage breaker is substantially rectangular parallelepiped, and in fig. 1, the orientation of the earth leakage breaker is taken as an example, and the longitudinal direction X of the earth leakage breaker is substantially the left-right direction, the width direction Y of the earth leakage breaker is substantially the front-rear direction, and the height direction Z of the earth leakage breaker is substantially the up-down direction.

Generally, one end of the N-pole conductive member 21 is electrically connected to an N-pole power terminal of the earth leakage breaker, and the other end thereof can be electrically connected to an N-pole load terminal of the earth leakage breaker after the stationary contact and the movable contact of the earth leakage breaker are contacted; the L utmost point electrically conductive piece 22 is including the first connecting plate of electricity connection in proper order, intermediate conductor and second connecting plate, the one end of first connecting plate is connected with electric leakage circuit breaker's L utmost point electrical source terminal electricity, the other end of first connecting plate is connected with intermediate conductor's one end, intermediate conductor passes mutual-inductor 4 and circuit board 1, and can overlap on the intermediate conductor and be equipped with insulating part 3, the intermediate conductor is close to the part of release 6 and twines and use as leakage coil on the coil former of release 6, the other end of intermediate conductor can be connected with electric leakage circuit breaker's L utmost point load terminal electricity after electric leakage circuit breaker's stationary contact and movable contact. And the N utmost point electrical source terminal and the L utmost point electrical source terminal of electric leakage circuit breaker are located the one side of the length direction X of electric leakage circuit breaker, and the N utmost point load terminal and the L utmost point load terminal of electric leakage circuit breaker are located the other side of the length direction X of electric leakage circuit breaker, therefore, N utmost point electrically conductive piece 21 and the electrically conductive piece 22 of L utmost point need extend to the opposite side from the one side of the length direction X of electric leakage circuit breaker, or said, N utmost point electrically conductive piece 21 and the electrically conductive piece 22 of L utmost point need roughly lay along the length direction X of electric leakage circuit breaker to the both ends of the electrically conductive piece 21 of N utmost point and the electrically conductive piece 22 of L utmost point are connected with corresponding power supply terminal, load terminal electricity respectively.

In the embodiment of the present application, the N-pole conductive member 21 is an integrated structure, that is, the N-pole conductive member 21 may be formed by one-time stamping with a stamping machine. Thus, the N-pole conductive member 21 does not need to be assembled by welding a plurality of sections of conductive members, so that on one hand, the assembling process of the N-pole conductive member 21 can be saved, and the assembling efficiency of the earth leakage breaker can be improved; on the other hand, the welding cost can be saved, and the situation that the N-pole conductive piece 21 generates heat when in use and even causes electricity safety due to poor welding quality can be avoided; in another aspect, the integrated structure makes the N-pole conductive member 21 not easily deformed, and may improve the reliability of the electrical connection of the N-pole conductive member 21 with other structures, thereby improving the performance stability of the leakage breaker.

The width of small residual-current circuit breakers is small, for example, some residual-current circuit breakers are only 18 mm wide. In order to facilitate improvement of the mounting stability of the mutual inductor 4 in the earth leakage breaker, in some embodiments, as shown in fig. 1, the circuit board 1 and the mutual inductor 4 may be attached together along the width direction Y of the earth leakage breaker. In this case, the circuit board 1 may be provided with a via hole 11 in the thickness direction thereof through which the conductive member 2 passes, so that the conductive member 2 may extend substantially in the length direction X of the electrical leakage breaker after passing through the via hole 11 of the circuit board 1. The via hole 11 may be a round hole, a square hole, a triangular hole, etc., and the aperture of the via hole 11 needs to consider at least the following two factors in design: on the one hand, it is ensured that both the N-pole conductive member 21 and the L-pole conductive member 22 can pass through the via hole 11; on the other hand, it is ensured that the N-pole conductive member 21 and the L-pole conductive member 22 located in the via hole 11 have a large distance from the electronic components on the circuit board 1 as much as possible. The shape, the aperture and the like of the via hole 11 are not limited in the embodiment of the present application.

The circuit board 1 is usually mounted with many electronic devices, and most electronic devices have insulation requirements. In the case where the width dimension of the earth leakage breaker is small, it is impossible to have a large space between each of the N-pole conductive member 21 and the L-pole conductive member 22 located in the via hole 11 and the electronic device on the wiring board 1. If these distances do not meet the insulation requirements, electrical connection between the conductive assembly 2 and these electronic devices may occur during surge tests or other high current surges, which may affect the safe use of the earth leakage breaker. In addition, when the portions of N-pole conductive pieces 21 and L-pole conductive pieces 22 located in via holes 11 are arranged in the width direction Y of the earth leakage breaker, it is impossible to have a large space between N-pole conductive pieces 21 and L-pole conductive pieces 22 located in via holes 11. If this distance does not meet the insulation requirements, an electrical connection may also occur between the N-pole conductive member 21 and the L-pole conductive member 22 located in the via hole 11, which also affects the safe use of the earth leakage breaker. Therefore, the insulating member 3 may be sleeved on both the N-pole conductive member 21 and the L-pole conductive member 22, and at least part of the insulating member 3 is located between the hole wall of the via hole 11, the N-pole conductive member 21 and the L-pole conductive member 22, so as to increase the creepage distance between the N-pole conductive member 21 and the L-pole conductive member 22, increase the creepage distance between the N-pole conductive member 21 and the electronic device on the circuit board 1, and increase the creepage distance between the L-pole conductive member 22 and the electronic device on the circuit board 1 through the insulating member 3, thereby improving the electrical insulation between the N-pole conductive member 21, the L-pole conductive member 22 and these electronic devices, and improving the safety of the earth leakage breaker.

The insulating member 3 may be made of any material having insulating properties, and the texture of the insulating member 3 may be soft or hard. To facilitate assembly, in some embodiments, the insulator 3 may be a heat shrink tube. The heat shrinkable tube is a special polyolefin heat shrinkable sleeve, the outer layer is made of high-quality soft cross-linked polyolefin material and an inner layer of hot melt adhesive through composite processing, and the outer layer material has the characteristics of insulation, corrosion resistance, wear resistance and the like. The N-pole conductive piece 21 is sleeved with the heat shrinkable tube, the heat shrinkable tube can be tightly attached to the N-pole conductive piece 21 after being heated and shrunk, and the N-pole conductive piece 21 is not easy to move in position, so that the position of the heat shrinkable tube is convenient to be limited between the circuit board 1 and the N-pole conductive piece 21, the circuit board 1 and the N-pole conductive piece 21 are well isolated, the position of the heat shrinkable tube is also convenient to be limited between the N-pole conductive piece 21 and the L-pole conductive piece 22, the N-pole conductive piece 21 and the L-pole conductive piece 22 are isolated, and the effects of insulation and breakdown prevention are achieved. Similarly, the L-pole conductive piece 22 is sleeved with the heat shrink tube, so that the position of the heat shrink tube is conveniently limited between the circuit board 1 and the L-pole conductive piece 22, the circuit board 1 and the L-pole conductive piece 22 are well isolated, the position of the heat shrink tube is also conveniently limited between the N-pole conductive piece 21 and the L-pole conductive piece 22, the N-pole conductive piece 21 and the L-pole conductive piece 22 are isolated, and the functions of insulation and breakdown prevention are achieved.

In this application embodiment, set up N utmost point electrically conductive piece 21 to integrated structure, not only can save the equipment process of N utmost point electrically conductive piece 21, improve the packaging efficiency of electric leakage circuit breaker, can also save the welding cost, and can avoid making N utmost point electrically conductive piece 21 generate heat when using or even cause the circumstances of power consumption safety to take place because of welding quality is not good, can also reduce the probability that N utmost point electrically conductive piece 21 takes place to warp, improve the reliability that N utmost point electrically conductive piece 21 is connected with other structure electricity. In addition, the insulating parts 3 are sleeved on the N-pole conductive part 21 and the L-pole conductive part 22, so that the insulating parts 3 positioned in the via holes 11 of the circuit board 1 can isolate the N-pole conductive part 21, the L-pole conductive part 22 and the circuit board 1, the creepage distance between the N-pole conductive part 21, the L-pole conductive part 22 and electronic devices with insulation requirements on the circuit board 1 is increased, the electrical insulation between the N-pole conductive part 21, the L-pole conductive part 22 and the electronic devices is improved, the possibility of electrical breakdown between the N-pole conductive part 21 and the L-pole conductive part 22 and the electronic devices is reduced, and the use safety of the leakage circuit breaker is improved.

In some embodiments, as shown in fig. 2, the N-pole conductive member 21 may include a first conductive plate 23, a second conductive plate 24, and a third conductive plate 25 connected in sequence, where the first conductive plate 23 and the third conductive plate 25 both have a non-zero included angle with the second conductive plate 24, and the insulating member 3 is sleeved on the second conductive plate 24.

First conductive plate 23, second conductive plate 24, and third conductive plate 25 may be bent from the same metal conductive plate. The first conductive plate 23 and the third conductive plate 25 may be bent in the same direction or in different directions with respect to the second conductive plate 24. The first conductive plate 23 and the third conductive plate 25 may be located on the same plane or may be located on different planes. The interval between the first conductive plate 23 and the third conductive plate 25 in the first direction may be set according to the inner space of the earth leakage breaker.

As shown in fig. 2, the first conductive plate 23 and the third conductive plate 25 are both located outside the circuit board 1, and a part of the second conductive plate 24 is located between the hole wall of the via hole 11 of the circuit board 1 and the N-pole conductive member 21, so that, in order to improve the electrical insulation between the N-pole conductive member 21 and the electronic device on the circuit board 1, the insulating member 3 may be sleeved on the second conductive plate 24, so that the insulating member 3 is located at least partially between the hole wall of the via hole 11 and the N-pole conductive member 21.

The insulator 3 is fitted over the second conductive plate 24, with one end of the insulator 3 being adjacent to the first conductive plate 23 and the other end being adjacent to the third conductive plate 25. When the length of the insulating member 3 is smaller than the distance between the first conductive plate 23 and the third conductive plate 25, if the insulating member 3 moves relative to the N-pole conductive member 21, it can only move a small amount between the first conductive plate 23 and the third conductive plate 25, and the possibility of moving out from between the hole wall of the via hole 11 and the N-pole conductive member 21 due to a large moving amount can be reduced, thereby helping the insulating member 3 to play a role of isolating the circuit board 1 from the N-pole conductive member 21. When the length of the insulating member 3 is equal to the distance between the first conductive plate 23 and the third conductive plate 25, the two ends of the insulating member 3 are respectively in contact with the first conductive plate 23 and the third conductive plate 25, and the insulating member 3 is sandwiched between the first conductive plate 23 and the third conductive plate 25 and cannot move, so that the insulating member 3 cannot move out from between the hole wall of the via hole 11 and the N-pole conductive member 21, and the insulating member 3 can well play a role of isolating the circuit board 1 from the N-pole conductive member 21.

In this embodiment, the N-pole conductive member 21 is configured as a multi-segment type, and the insulating member 3 is sleeved on the second conductive plate 24, so that the two ends of the insulating member 3 can be limited by the first conductive plate 23 and the third conductive plate 25, and the possibility that the insulating member 3 moves relative to the N-pole conductive member 21 can be reduced, or the amplitude of the insulating member 3 moving relative to the N-pole conductive member 21 can be reduced, so that the possibility that the insulating member 3 moves out from between the hole wall of the via hole 11 and the N-pole conductive member 21 can be reduced, and the effect of the insulating member 3 isolating the circuit board 1 and the N-pole conductive member 21 is improved. In addition, the N-pole conductive member 21 is multi-sectioned, the position of the insulating member 3 is limited by the first conductive plate 23 and the third conductive plate 25, and other structural members are not additionally arranged for limiting, so that the structure of the residual current circuit breaker is simplified.

In some embodiments, as shown in fig. 2, a side of the third conductive plate 25 away from the first conductive plate 23 is integrally provided with a protrusion 251, and the protrusion 251 is configured as a stationary contact of the earth leakage breaker.

The projection 251 as the stationary contact of the earth leakage breaker may be integrally formed with the N-pole conductive member 21, so that the assembling process of the stationary contact and the N-pole conductive member 21 may be omitted, thereby facilitating the improvement of the assembling efficiency of the earth leakage breaker. In addition, the welding cost of the static contact and the N-pole conductive piece 21 can be saved, the influence on the reliability of the electric connection of the static contact and the N-pole conductive piece 21 due to poor welding quality can be avoided, and the use safety of the residual current circuit breaker can be improved.

In some embodiments, as shown in fig. 2, the outer circumferential peripheries of both the N-pole conductor 21 and the L-pole conductor 22 are wrapped by the insulating member 3.

The outer peripheral surface circumference of the N-pole conductor 21 refers to the circumferential entire side wall of the N-pole conductor 21, and the outer peripheral surface circumference of the L-pole conductor 22 refers to the circumferential entire side wall of the L-pole conductor 22.

The outer circumference of the N-pole conductive member 21 is surrounded by the insulating member 3, that is, the outer circumference of the N-pole conductive member 21 is surrounded by the insulating member 3, so that the electrical insulation between each part of the outer circumference of the N-pole conductive member 21 and the L-pole conductive member 22 and the electronic components can be improved. Similarly, the peripheral surface of the L-pole conductive member 22 is surrounded by the insulating member 3, so that electrical insulation between each part of the peripheral surface of the L-pole conductive member 22 and the N-pole conductive member 21 and the electronic components can be improved.

On the basis of the present embodiment, if the size of the insulating member 3 in the first direction (i.e., the length of the insulating member 3) is larger, and the circumference of the insulating member 3 located between the hole wall of the via hole 11, the N-pole conductive member 21, and the L-pole conductive member 22 covers the outer circumferential surfaces of the N-pole conductive member 21 and the L-pole conductive member 22 more in the first direction, the insulating member 3 has a better effect of insulating the N-pole conductive member 21, the L-pole conductive member 22 from the aforementioned electronic device. Wherein the first direction is the direction in which the conductive member 2 passes through the wiring board 1. The first direction may be the same as the length direction X of the earth leakage breaker, or may have a smaller included angle with the length direction X of the earth leakage breaker. The positional relationship between the insulating member 3 and the wiring board 1 along the two board surfaces of the electrical leakage breaker in the longitudinal direction X will be described in each case with reference to the magnitude relationship between the length of the insulating member 3 and the dimension of the wiring board 1 along the first direction.

For ease of description, the following assumptions are made before the introduction: assuming that the insulating member 3 includes a first end 31 and a second end 32 along the first direction, the circuit board 1 includes a first board surface 12 and a second board surface 13, and the first end 31 is an end portion of the insulating member 3 close to one side of the length direction X of the electrical leakage breaker, and the second end 32 is an end portion of the insulating member 3 close to the other side of the length direction X of the electrical leakage breaker; the first plate surface 12 is a plate surface of the wiring board 1 on one side in the longitudinal direction X of the residual current circuit breaker, and the second plate surface 13 is a plate surface of the wiring board 1 on the other side in the longitudinal direction X of the residual current circuit breaker. In other words, the first end 31 and the first plate surface 12 are close to one side of the electrical leakage breaker in the longitudinal direction X, and the second end 32 and the second plate surface 13 are close to the other side of the electrical leakage breaker in the longitudinal direction X.

In the first case: the length of the insulating member 3 is smaller than the dimension of the wiring board 1 in the first direction.

In a first possible embodiment, the first end 31 of the insulating member 3 extends beyond the circuit board 1, and the second end 32 is located between the first board surface 12 and the second board surface 13 of the circuit board 1. Alternatively, the second end 32 extends beyond the circuit board 1, and the first end 31 is located between the first board surface 12 and the second board surface 13. In a second possible embodiment, the first end 31 is flush with the first panel 12 and the second end 32 is located between the first panel 12 and the second panel 13. Alternatively, the second end 32 is flush with the second panel 13 and the first end 31 is located between the first panel 12 and the second panel 13. In a third possible embodiment, the first end 31 and the second end 32 are both located between the first deck 12 and the second deck 13. In this case, the second and third possible embodiments are advantageous in that the length of the insulating member 3 between the wall of the via hole 11 and the N-pole conductive member 21 and the L-pole conductive member 22 is longer than that of the first possible embodiment, and the electrical insulation between the N-pole conductive member 21 and the L-pole conductive member 22 and the electronic device is further improved.

In the second case: the length of the insulating member 3 is equal to the dimension of the wiring board 1 in the first direction.

In a first possible embodiment, the first end 31 of the insulating member 3 extends beyond the circuit board 1, and the second end 32 is located between the first board surface 12 and the second board surface 13. Alternatively, the second end 32 extends beyond the circuit board 1, and the first end 31 is located between the first board surface 12 and the second board surface 13. In a second possible embodiment, as shown in fig. 3, two end faces of the insulating member 3 are flush with two plate faces of the circuit board 1, respectively. Illustratively, the first end 31 is flush with the first panel 12 and the second end 32 is flush with the second panel 13. In this case, the second possible embodiment is longer than the first possible embodiment in the length of the insulating member 3 between the hole wall of the via hole 11, the N-pole conductive member 21, and the L-pole conductive member 22. In this way, it is convenient to cover the outer layers of the N-pole conductive member 21 and the L-pole conductive member 22 in the via hole 11 with the insulating member 3, so that the circuit board 1, the N-pole conductive member 21 and the L-pole conductive member 22 in the via hole 11 can be effectively isolated, and the possibility of electrical breakdown, which is caused by the electrical connection of the electronic device, the N-pole conductive member 21 and the L-pole conductive member 22, can be reduced.

In the third case: the length of the insulating member 3 is larger than the dimension of the wiring board 1 in the first direction.

In a first possible embodiment, the first end 31 extends beyond the circuit board 1 and the second end 32 is located between the first board surface 12 and the second board surface 13. Alternatively, the second end 32 extends beyond the circuit board 1, and the first end 31 is located between the first board surface 12 and the second board surface 13. In a second possible embodiment, as shown in fig. 4 and 5, one end of the insulating member 3 is flush with one surface of the circuit board 1 and the other end extends beyond the circuit board 1. Illustratively, as shown in FIG. 4, the first end 31 is flush with the first panel 12 and the second end 32 extends beyond the second panel 13; alternatively, as shown in fig. 5, the second end 32 is flush with the second panel 13 and the first end 31 extends beyond the first panel 12. In a third possible embodiment, as shown in fig. 2, both ends of the insulating member 3 extend beyond the wiring board 1. Illustratively, the first end 31 extends beyond the first panel 12 and the second end 32 extends beyond the second panel 13.

In this third case, compared to the first possible embodiment, the lengths of the insulating members 3 located between the hole wall of the via hole 11 and the N-pole conductive member 21 and the L-pole conductive member 22 are longer in the second and third possible embodiments, so that the insulating members 3 cover the outer layers of the N-pole conductive member 21 and the L-pole conductive member 22 located in the via hole 11, and the electrical insulation between the N-pole conductive member 21 and the L-pole conductive member 22 and the electronic device is further improved. In addition, the insulating member 3 beyond the circuit board 1 can also cover the outer layers of the N-pole conductive member 21 and the L-pole conductive member 22 outside the via hole 11 with the insulating member 3, so that the circuit board 1, the N-pole conductive member 21 and the L-pole conductive member 22 in the via hole 11 are effectively isolated, the possibility of electrical breakdown and even electrical connection between the electronic device and the conductive assembly 2 is reduced, and meanwhile, the adjacent N-pole conductive member 21 and the adjacent L-pole conductive member 22 can be isolated, so that the possibility of electrical breakdown and even electrical connection between the adjacent N-pole conductive member 21 and the adjacent L-pole conductive member 22 is reduced.

In view of the above analysis, when designing the insulating member 3, the length of the insulating member 3 may be set to a larger point, and the peripheries of the N-pole conductive member 21 and the L-pole conductive member 22 located in the via hole 11 may be covered with the insulating member 3 as much as possible, so that the insulating member 3 may insulate the adjacent N-pole conductive member 21 and the L-pole conductive member 22 while insulating the aforementioned electronic device from the conductive component 2, and reduce the possibility of electrical connection, even electrical breakdown, between the adjacent N-pole conductive member 21 and the L-pole conductive member 22.

In some embodiments, as shown in fig. 6, the N-pole conductive member 21 may be provided with a position-limiting structure 5, and the position-limiting structure 5 is used for limiting the position of the insulating member 3 on the N-pole conductive member 21. It is understood that L-pole conductor 22 may also be provided with a position-limiting structure 5 to limit the position of insulator 3 on L-pole conductor 22.

Similar to the description of the previous embodiment, the insulating member 3 is sleeved on the N-pole conductive member 21 and the L-pole conductive member 22, if the insulating member 3 moves on the N-pole conductive member 21 and the L-pole conductive member 22, the insulating member may move out from between the hole wall of the via hole 11 and the N-pole conductive member 21 and the L-pole conductive member 22, so that the circuit board 1, the N-pole conductive member 21, and the L-pole conductive member 22 cannot be isolated by the insulating member 3, and based on this, the position limiting structures 5 may be disposed on both the N-pole conductive member 21 and the L-pole conductive member 22 to limit the position of the insulating member 3 by the position limiting structures 5, so that the insulating member 3 plays a role of isolating the circuit board 1, the N-pole conductive member 21, and the L-pole conductive member 22.

The structure of the limiting structure 5 will be described in detail with reference to the following embodiments.

In some embodiments, as shown in fig. 6, the position limiting structure 5 may include a first position limiting portion 51 and a second position limiting portion 52 arranged along a first direction, and the insulating member 3 is located between the first position limiting portion 51 and the second position limiting portion 52, where the first direction is a direction in which the N-pole conductive member 21 passes through the circuit board 1.

Taking the insulating element 3 sleeved on the second conductive plate 24 as an example, the first limiting portion 51 may be a first protrusion structure disposed on a sidewall of the first end 31 of the second conductive plate 24, and the first protrusion structure may be a closed annular protrusion disposed on the sidewall of the first end 31, or may be an unclosed semi-annular protrusion; similarly, the second position-limiting portion 52 may be a second protrusion structure disposed on a sidewall of the second end 32 of the second conductive plate 24, and the second protrusion structure may be a closed annular protrusion disposed on a sidewall of the second end 32, or a semi-annular protrusion that is not closed.

The first stopper 51 and the second stopper 52 may have the same or different structures. For example, when the first stopper portion 51 is a closed annular projection, the second stopper portion 52 may be a closed annular projection or an unclosed semi-annular projection.

The first limiting portion 51 and the second limiting portion 52 may be arranged in the same line or in different lines along the first direction, which is not limited in the embodiment of the present application. For example, when the first stopper 51 is disposed near the upper side of the sidewall of the first end 31 of the second conductive plate 24, the second stopper 52 may be disposed near the upper side of the sidewall of the second end 32 of the second conductive plate 24, or may be disposed near the lower side of the sidewall of the second end 32 of the second conductive plate 24. Wherein the sidewall upper side refers to an upper portion of the sidewall and the sidewall lower side refers to a lower portion of the sidewall.

The distance between the first position-limiting portion 51 and the second position-limiting portion 52 in the first direction may be slightly larger than the length of the insulating member 3. Taking the N-pole conductive piece 21 as an example, after the insulating piece 3 is sleeved on the N-pole conductive piece 21, the first limiting portion 51 can contact with one end of the insulating piece 3, and the second limiting portion 52 can contact with the other end of the insulating piece 3, so that the insulating piece 3 can be clamped by the first limiting portion 51 and the second limiting portion 52 and cannot move along the first direction, thereby reducing the possibility that the insulating piece 3 moves out from between the hole wall of the via hole 11 and the circuit board 1, and improving the effect of the insulating piece 3 in isolating the circuit board 1, the N-pole conductive piece 21 and the L-pole conductive piece 22.

It should be added here that, in order to facilitate the assembly of the insulating member 3 on the N-pole conductive member 21, at least one of the first and second limit structures 5 and 5 may be detachably connected to the N-pole conductive member 21. When the insulating part 3 needs to be assembled, the limiting structure 5 detachably connected with the N-pole conductive part 21 can be detached first, then the insulating part 3 is sleeved on the N-pole conductive part 21, and finally the detached limiting structure 5 is connected to the N-pole conductive part 21, so that the assembly of the insulating part 3 on the N-pole conductive part 21 is not influenced while the first limiting structure 5 and the second limiting structure 5 provide limiting action.

In some embodiments, taking the N-pole conductive member 21 as an example, a groove may be disposed on a side wall of the N-pole conductive member 21 close to the circuit board 1, and the insulating member 3 is located in the groove, the groove has a first groove wall and a second groove wall opposite to each other along the first direction, the first groove wall is configured as the first position-limiting portion 51, and the second groove wall is configured as the second position-limiting portion 52.

The side wall of N-pole conductor 21 near circuit board 1 is the outer circumferential surface of N-pole conductor 21, and the recess may be an annular recess provided in the side wall of N-pole conductor 21.

The distance between the first and second groove walls in the first direction may be slightly greater than the length of the insulating member 3. After the insulating member 3 is located in the groove, the first groove wall may contact with one end of the insulating member 3, and the second groove wall may contact with the other end of the insulating member 3, so that the insulating member 3 is clamped by the first groove wall and the second groove wall and cannot move along the first direction, thereby reducing the possibility that the insulating member 3 moves out from between the hole wall of the via hole 11 and the circuit board 1, and improving the effect of the insulating member 3 in isolating the circuit board 1, the N-pole conductive member 21, and the L-pole conductive member 22.

In this embodiment, the first groove wall of the groove is used as the first limiting portion 51, and the second groove wall of the groove is used as the second limiting portion 52, so that the arrangement manner of the limiting structure 5 is more flexible and diversified. It should be noted that, the position limiting structure 5 of this embodiment is more suitable for the case where the insulating member 3 is a heat shrinkable tube, and after the heat shrinkable tube is sleeved on the N-pole conductive member 21 and the L-pole conductive member 22, the heat shrinkable tube is heated to shrink in the groove, so that the first groove wall and the second groove wall limit the position of the heat shrinkable tube. When the insulating members 3 are made of other hard materials or non-deformable structures, the insulating members 3 may need to be modified in structure, for example, a snap, a spring plate, etc. may be disposed on the inner edge of the insulating members 3. The embodiments of the present application do not limit this.

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 in the embodiments of the present application.

Claims (10)

1. An electrical leakage breaker, comprising:

a circuit board having a via hole;

the conductive assembly comprises an N-pole conductive piece and an L-pole conductive piece, and the N-pole conductive piece is of an integrated structure; the conductive component penetrates through the via hole, the N-pole conductive piece and the L-pole conductive piece are both sleeved with insulating pieces, and at least parts of the insulating pieces are located on the hole wall of the via hole, the N-pole conductive piece and the L-pole conductive piece.

2. The residual current circuit breaker of claim 1, wherein the N-pole conductive member comprises a first conductive plate, a second conductive plate and a third conductive plate connected in sequence, the first conductive plate and the third conductive plate each have a non-zero included angle with the second conductive plate, and the insulator is sleeved on the second conductive plate.

3. An electrical leakage breaker as claimed in claim 2, characterized in that a side of the third conductive plate remote from the first conductive plate is integrally provided with a projection configured as a stationary contact of the electrical leakage breaker.

4. An earth leakage breaker according to claim 1, characterized in that the outer circumferential peripheries of the N-pole conductive member and the L-pole conductive member are each surrounded by the insulating member.

5. A residual current circuit breaker according to claim 4, characterized in that the two end faces of the insulating member are flush with the two faces of the circuit board, respectively.

6. A residual current circuit breaker according to claim 5, characterized in that one end of the insulating member is flush with one face of the circuit board and the other end extends beyond the circuit board; or,

both ends of the insulating part exceed the circuit board.

7. A residual current circuit breaker as claimed in claim 1, characterized in that said insulating member is a heat shrink tube.

8. A residual current circuit breaker according to any one of claims 1-7, characterized in that said N-pole conductive member is provided with a position limiting structure for limiting the position of said insulating member on said N-pole conductive member.

9. A residual current circuit breaker as claimed in claim 8, wherein the position limiting structure comprises a first position limiting portion and a second position limiting portion arranged along a first direction, the insulating member is located between the first position limiting portion and the second position limiting portion, and the first direction is a direction in which the N-pole conductive member passes through the circuit board.

10. The residual current circuit breaker as claimed in claim 9, wherein the N-pole conductive member is provided with a groove near a side wall of the circuit board, the insulating member is located in the groove, the groove has a first groove wall and a second groove wall opposite to each other along the first direction, the first groove wall is configured as the first position-limiting portion, and the second groove wall is configured as the second position-limiting portion.

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