CN215183796U - Integrated residual current circuit breaker - Google Patents

Abstract

The utility model provides an integral type electric leakage circuit breaker relates to electric leakage circuit breaker technical field, and this integral type electric leakage circuit breaker includes casing, the utmost point wiring board of N, the utmost point wire of N, the wiring board of L utmost point, the utmost point wire of L and mutual-inductor, welds an extreme point of the utmost point wire of L on the wiring board of L utmost point, and the width of the wiring board of the utmost point of N and L is all less than the internal diameter of mutual-inductor. Compared with the prior art, the utility model provides an integral type electric leakage circuit breaker makes and to carry out spot welding between wire and the wiring board through the width size who improves N utmost point wiring board and L utmost point wiring board and is connected, compares its fail safe nature of soldering mode and strengthens greatly, and can assemble again after the advance spot welding, has avoided the wire to pass the problem of the assembly difficulty that mutual-inductor rewelding brought earlier. The welding device can improve the reliability of products, is simple in assembling and welding processes, is convenient to assemble, and can guarantee the welding effect.

Description

Integrated residual current circuit breaker

Technical Field

The utility model relates to a residual current circuit breaker technical field particularly, relates to an integral type residual current circuit breaker.

Background

The residual current circuit breaker is based on a circuit breaker, expands the residual current function, and is called residual current operated circuit breaker (RCBO) for short. The leakage circuit breaker has two types of assembled type and integrated type. The integrated residual current circuit breaker has the characteristics of small volume, difficulty in wire connection and error connection, low cost and the like, and is more and more widely accepted by the market.

A residual current circuit breaker usually has two main conductors (live and neutral) and a transformer through which the two conductors of the main circuit have to pass. Under normal conditions, the sum of the current vectors of the two main leads of the main circuit is 0 (one input and one output), at the moment, the mutual inductor has no output, and the product works normally. When the circuit generates leakage current and reaches a specified value, the mutual inductor outputs a signal to a circuit board (PCBA) and drives a tripper to act to drive the moving and static contacts of the circuit breaker body to be separated and cut off the circuit.

In consideration of the requirement of convenience in assembly, the main circuit of the mainstream integrated leakage product on the market is mostly soldered. However, if the RCBO is operated under a large load for a long time, the internal temperature rise is high. The melting point of tin is only 230 ℃, which brings great hidden trouble to the reliability of the product. In addition, because the size of the wiring board is usually not matched with the mutual inductor among the prior art, the main lead can only be penetrated through the mutual inductor and then spot welded or soldered on the wiring board, thus the mutual inductor needs to be lifted or pulled when being welded, the assembly and welding process is very complicated, the assembly is difficult, and the welding effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an integral type electric leakage circuit breaker, its reliability that can improve the product to assembly, welding process are simple, make convenient assembling, and can guarantee the welding effect.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides an integrated residual current circuit breaker, which comprises a shell, an N pole wiring board, an N pole lead, an L pole wiring board, an L pole lead and a mutual inductor, the mutual inductor is accommodated in the shell, the N-pole wiring board and the L-pole wiring board are arranged in the shell at intervals, the N-pole lead and the L-pole lead are both arranged in the mutual inductor in a penetrating way, one end of the N-pole lead is spot-welded on the N-pole wiring board, the width of the N-pole wiring board is smaller than the inner diameter of the mutual inductor, so that the N-pole wiring board and the N-pole lead can pass through the mutual inductor after spot welding is completed, one end of the L-pole lead wire is spot-welded on the L-pole wiring board, the width of the L-pole wiring board is smaller than the inner diameter of the mutual inductor, so that the L pole wiring board and the L pole lead can pass through the mutual inductor after spot welding is completed.

In an optional embodiment, the housing includes a base, a middle partition plate, and an upper cover, the base and the upper cover are oppositely disposed on two sides of the middle partition plate, a notch groove is disposed on an edge of one side of the middle partition plate, and the L-pole lead or the N-pole lead is inserted into the notch groove.

In an alternative embodiment, an opening width of the notch groove is greater than a wire diameter of the L-pole wire and the N-pole wire.

In optional embodiment, be provided with spacing post on the base, the upper cover with spacing post can be dismantled and be connected, or cover on and be provided with spacing post, the base with spacing post can be dismantled and be connected, just spacing post is located outside the opening in breach groove, be used for right the breach inslot the L utmost point wire or the N utmost point wire is spacing.

In an optional embodiment, a positioning shifting piece is arranged at an opening of the notch groove, a positioning groove is arranged on the outer peripheral surface of the limiting column, and the positioning shifting piece is assembled in the positioning groove.

In an optional embodiment, an L-pole cavity is formed between the base and the intermediate partition, an L-pole outgoing line end seat is arranged in the L-pole cavity, a part of the L-pole outgoing line end seat extends out of the L-pole cavity, and the L-pole wiring board is detachably mounted on the L-pole outgoing line end seat and is electrically connected with the L-pole outgoing line end seat;

an N pole cavity is formed between the upper cover and the middle partition plate, an N pole wire outlet end seat is arranged in the N pole cavity, the N pole wire outlet end seat partially extends out of the N pole cavity and is arranged on two sides of the middle partition plate opposite to the L pole wire outlet end seat, and the N pole wiring board is detachably arranged on the N pole wire outlet end seat and is electrically connected with the N pole wire outlet end seat.

In an optional embodiment, the L-pole wiring board includes an L-pole mounting portion and an L-pole connecting portion, the L-pole mounting portion is detachably mounted on the L-pole outgoing line end seat, the L-pole connecting portion is connected with one end of the L-pole mounting portion and is arranged in a bent manner, the L-pole wire is connected with the L-pole connecting portion, an L-pole stopping edge is further arranged at one end of the L-pole mounting portion away from the L-pole connecting portion, the width of the L-pole stopping edge is greater than that of the L-pole mounting portion and is used for stopping the L-pole outgoing line end seat, and the width of the L-pole stopping edge is smaller than the inner diameter of the transformer;

the utility model discloses a transformer, including the utmost point wiring board of N, N is extremely connected with the utmost point wiring end base, N is extremely connected with the utmost point wiring board of N, N is extremely connected with the utmost point wiring end base of N, N utmost point installation department detachably installs on the utmost point line end base of N, N utmost point connecting portion with the one end of N utmost point installation department is connected and is the form setting of bending, the N utmost point wire with N utmost point connecting portion are connected, N utmost point installation department is kept away from the one end of N utmost point connecting portion still is provided with the utmost point flange of N, the width of N utmost point flange of stopping is greater than the width of N utmost point installation department is used for the backstop is in on the utmost point line end base of N, just the width of N utmost point flange of stopping is less than the internal diameter of mutual-inductor.

In an alternative embodiment, the L-pole connecting portion is bent in a first direction with respect to the L-pole mounting portion, and the N-pole connecting portion is bent in a second direction with respect to the N-pole mounting portion, where the first direction and the second direction are opposite to each other, so that the L-pole lead and the N-pole lead are disposed in a staggered manner.

In an optional embodiment, an L-pole coil is further disposed in the L-pole cavity, one end of the L-pole lead is connected to the L-pole coil, and the other end of the L-pole lead is connected to the L-pole wiring board; and a static contact is also arranged in the N-pole cavity, one end of the N-pole lead is connected with the static contact, and the other end of the N-pole lead is connected with the N-pole wiring board.

In an optional implementation manner, a circuit board is further disposed in the housing, an L-pole signal line is disposed on the L-pole wiring board, an N-pole signal line is disposed on the N-pole wiring board, a mutual inductance signal line is disposed on the mutual inductor, and the L-pole signal line, the N-pole signal line and the mutual inductance signal line are all connected to the circuit board.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides an integral type residual current circuit breaker welds an extreme point of N utmost point wire on the N utmost point wiring board, welds an extreme point of L utmost point wire on the L utmost point wiring board, and the width of N utmost point wiring board and L utmost point wiring board all is less than the internal diameter of mutual-inductor. Thereby can realize earlier spot welding, the step of passing the mutual-inductor again, specifically, when actual assembly, as an organic whole with L utmost point wire and L utmost point wiring board spot welding, as an organic whole with N utmost point wire and N utmost point wiring board spot welding, will accomplish L utmost point wire and L utmost point wiring board after spot welding again and pass the mutual-inductor, will accomplish N utmost point wire and N utmost point wiring board after spot welding and pass the mutual-inductor, fix L utmost point wiring board and N utmost point wiring board in the casing again at last. Compared with the prior art, the utility model provides an integral type electric leakage circuit breaker realizes being connected between wire and the wiring board through the mode of spot welding, compares in its fail safe nature of soldering mode reinforcing greatly to can assemble again after the advance spot welding, avoid the wire to pass the mutual-inductor earlier and weld the problem of the assembly difficulty that brings again. The welding device can improve the reliability of products, is simple in assembling and welding processes, is convenient to assemble, and can guarantee the welding effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an internal structure of an N-pole cavity of an integrated residual current circuit breaker at a first viewing angle according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of an L-pole cavity of the integrated residual current circuit breaker according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of an integrated residual current circuit breaker according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the middle partition plate in FIG. 3;

FIG. 5 is a schematic view of a connection structure between the middle partition and the base in FIG. 3;

FIG. 6 is an enlarged partial schematic view of VI of FIG. 5;

FIG. 7 is a schematic structural view of the L-pole wiring board of FIG. 1;

fig. 8 is a schematic view of an internal structure of an N-pole cavity of the integrated residual current circuit breaker at a second viewing angle according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of the base in fig. 3.

Icon:

100-integral earth leakage circuit breaker; 110-a housing; 111-a base; 113-intermediate partition board; 115-an upper cover; 117-notch groove; 1171-positioning a paddle; 119-a limiting column; 1191-positioning groove; 120-a circuit board; 130-N pole terminal plate; 131-N pole signal lines; 140-an N-pole lead; 150-L pole terminal block; 151-L pole mounting portion; 153-L pole connection; 155-L pole stop edge; an L-pole signal line; a 160-L pole lead; 170-a mutual inductor; 171-mutual inductive signal lines; a 180-L pole outgoing line end seat; 181-L pole coil; 190-N pole outlet terminal seat; 191-static contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As disclosed in the background art, in the conventional integrated residual current circuit breaker, at least one pole of a lead wire is connected to a wiring board by using a soldering process, which has the advantages of convenient welding and large tolerance error during welding. However, the reliability of this soldering method is low because the melting point of tin is only 230 ℃, and the internal temperature rise of RCBO is particularly high when it is operated under a large load for a long time. In addition, because the size of the wiring board is not matched with the mutual inductor among the prior art, lead to at first can install the wiring board in the casing when the installation, then pass the leading wire behind the mutual inductor again tin-soldering on the wiring board, and because the influence of mutual inductor, leading wire need promote simultaneously or pull the mutual inductor when the welding, lead to very difficult when welding, be difficult to weld in place, lead to assembly, welding process very complicated to influence the welding effect.

In addition, because of the existing residual current circuit breaker, the L pole and the N pole belong to different chambers of the shell, which means that a main lead wire of one pole necessarily needs to pass through a partition in the middle of the shell to pass through the mutual inductor. The transformer cannot be made too small due to the thickness of the main conductor and the size of the terminal block. The requirement of tightness and positioning in different chambers is met, the grooves/holes of the middle partition plate cannot be opened too much, so that the wires are difficult to penetrate through the partition plate, or the wires are difficult to fix, so that the wires move in the grooves/holes, and the connection effect is influenced.

In order to solve the problem, the utility model provides an integral type electric leakage circuit breaker, its reliability that can improve the product to assembly, welding process are simple, make convenient assembling, and can guarantee the welding effect. Meanwhile, the lead can be limited after penetrating through the partition plate, so that the convenience of lead assembly is ensured, and the fixing effect of the lead is also ensured. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

First embodiment

Referring to fig. 1 and 2 in combination, the present embodiment provides an integrated residual current circuit breaker 100 which can improve reliability of a product, and is simple in assembly and welding processes, so that assembly is convenient, and a welding effect can be ensured. Meanwhile, the lead can be limited after penetrating through the partition plate, so that the convenience of lead assembly is ensured, and the fixing effect of the lead is also ensured.

The integrated residual current circuit breaker 100 provided by the embodiment comprises a shell 110, an N-pole wiring board 130, an N-pole wire 140, an L-pole wiring board 150, an L-pole wire 160 and a mutual inductor 170, wherein the mutual inductor 170 is accommodated in the shell 110, the N-pole wiring board 130 and the L-pole wiring board 150 are installed in the shell 110 at intervals, the N-pole wire 140 and the L-pole wire 160 are both penetrated through the mutual inductor 170, one end of the N-pole wire 140 is welded on the N-pole wiring board 130 in a spot welding mode, the width of the N-pole wiring board 130 is smaller than the inner diameter of the mutual inductor 170, so that the N-pole wiring board 130 and the N-pole wire 140 can penetrate through the mutual inductor 170 after the spot welding is completed, one end point of the L-pole wire 160 is welded on the L-pole wiring board 150, and the width of the L-pole wiring board 150 is smaller than the inner diameter of the mutual inductor 170, so that the L-pole wiring board 150 and the L-pole wire 160 can penetrate through the mutual inductor 170 after the spot welding is completed.

The integrated residual current circuit breaker 100 provided by this embodiment further includes a handle disposed on the housing 110, and an L-pole inlet terminal, an N-pole inlet terminal, an L-pole outlet terminal, and an N-pole outlet terminal disposed on the housing 110, and the external configuration thereof is the same as that of a conventional integrated residual current circuit breaker.

In this embodiment, the transformer 170 is in a spiral shape, the N-pole wire 140 and the L-pole wire 160 are all inserted into the transformer 170, and the widths of the L-pole wiring board 150 and the N-pole wiring board 130 are both smaller than the inner diameter of the transformer 170, when in actual installation, the N-pole wire 140 and the N-pole wiring board 130 are firstly spot-welded together, the L-pole wire 160 and the L-pole wiring board 150 are welded together, then the L-pole wiring board 150 is inserted into the transformer 170, the L-pole wire 160 is inserted into the transformer 170, the N-pole wiring board 130 is inserted into the transformer 170, the N-pole wire 140 is inserted into the transformer 170, and finally, the L-pole wiring board 150 and the N-pole wiring board 130 are fixed in the housing 110. The lead and the wiring board are connected in a spot welding mode, the safety and the reliability are greatly improved compared with a tin welding mode, the lead can be assembled after spot welding in advance, and the problem of difficult assembly caused by the fact that the lead penetrates through the mutual inductor 170 and then is welded is solved.

Referring to fig. 3 and 4, the housing 110 includes a base 111, a middle partition 113 and an upper cover 115, the base 111 and the upper cover 115 are disposed at two sides of the middle partition 113, an L-pole cavity is formed between the base 111 and the middle partition 113, an L-pole wiring board 150 is disposed in the L-pole cavity, an N-pole cavity is formed between the upper cover 115 and the middle partition 113, an N-pole wiring board 130 is disposed in the N-pole cavity, a transformer 170 is accommodated in the N-pole cavity or the L-pole cavity, a notch 117 for passing an L-pole lead 160 or an N-pole lead 140 is disposed on the middle partition 113, and the notch 117 connects the N-pole cavity and the L-pole cavity.

In this embodiment, the transformer 170 is accommodated in the N-pole cavity, and at this time, the L-pole wire 160 needs to pass through the notch groove 117 and then be disposed in the transformer 170, and the notch groove 117 on the middle partition 113 is close to the installation positions of the N-pole wiring board 130 and the L-pole wiring board 150, so that the L-pole wire 160 is convenient to route. Specifically, both ends of the L-pole wire 160 are located in the L-pole cavity, and in actual installation, after the L-pole wiring board 150 passes through the transformer 170, it needs to be fixed in the L-pole cavity, and at this time, the L-pole wire 160 passes through the notch slot 117 and pulls up the transformer 170, so that the transformer 170 is installed in place. The N-pole lead 140 is disposed in the N-pole cavity, but of course, in other preferred embodiments, the transformer 170 may also be disposed in the L-pole cavity, and at this time, the N-pole lead 140 needs to pass through the notch 117 and penetrate through the transformer 170.

In the present embodiment, the opening width of the notch groove 117 is larger than the wire diameter of the L-pole wire 160 and the N-pole wire 140. The L-pole lead 160 and the N-pole lead 140 are both standard electrode leads, and have the same wire diameter. In actual installation, the notch groove 117 is open and has a width larger than the diameters of the L-pole lead 160 and the N-pole lead 140, so that both the L-pole lead 160 and the N-pole lead 140 can be smoothly installed in the notch groove 117 and span between the L-pole cavity and the N-pole cavity. In the present embodiment, since the L-pole lead 160 is inserted into the notch groove 117, the opening width of the notch groove 117 needs to be larger than the diameter of the L-pole lead 160, and the entire wire passing area of the notch groove 117 should be adapted to the cross-sectional area of the L-pole lead 160, so that the stacked L-pole leads 160 (which need to be passed twice) can be fitted into the notch groove 117.

It should be noted that the opening width mentioned in this embodiment refers to the width of the narrowest portion of the notch groove 117, and when the narrowest portion of the notch groove 117 is greater than the widths of the L-pole wire 160 and the N-pole wire 140, the L-pole wire 160 can be smoothly installed in the notch groove 117, which is very convenient.

With continued reference to fig. 1 and 2, in the present embodiment, an L-pole outgoing line terminal block 180 is disposed in the L-pole cavity, a portion of the L-pole outgoing line terminal block 180 extends out of the L-pole cavity, and the L-pole wiring board 150 is detachably mounted on the L-pole outgoing line terminal block 180 and electrically connected to the L-pole outgoing line terminal block 180. An N-pole outgoing line end seat 190 is arranged in the N-pole cavity, the N-pole outgoing line end seat 190 partially extends out of the N-pole cavity and is arranged on two sides of the middle partition plate 113 opposite to the L-pole outgoing line end seat 180, and the N-pole wiring board 130 is detachably mounted on the N-pole outgoing line end seat 190 and is electrically connected with the N-pole outgoing line end seat 190. Specifically, an L-pole outlet terminal is disposed on the L-pole outlet terminal base 180 and electrically contacts the L-pole wiring board 150, so that an electrical outlet of the L-pole wire 160 is achieved, an N-pole outlet terminal is further disposed on the N-pole outlet terminal base 190 and electrically contacts the N-pole wiring board 130, and an electrical outlet of the N-pole wire 140 is achieved. The L-pole outlet terminal block 180 and the N-pole outlet terminal block 190 are respectively disposed at two sides of the middle partition 113, the L-pole wiring board 150 is inserted into the L-pole outlet terminal block 180 to be fixed, and the N-pole wiring board 130 is inserted into the N-pole outlet terminal block 190 to be fixed.

In the present embodiment, the L-pole terminal base 180 corresponds to an L-pole terminal outlet on the housing 110, and the N-pole terminal base 190 corresponds to an N-pole terminal outlet on the housing 110, so as to facilitate terminal outgoing.

In this embodiment, a circuit board 120 is further disposed in the housing 110, an L-pole signal line is disposed on the L-pole wiring board 150, an N-pole signal line 131 is disposed on the N-pole wiring board 130, a mutual inductance signal line 171 is disposed on the mutual inductor 170, and the L-pole signal line, the N-pole signal line 131 and the mutual inductance signal line 171 are all connected to the circuit board 120. Specifically, the circuit board 120 is disposed in the N-pole cavity, the L-pole signal line passes through the notch 117 and then is connected to the circuit board 120, and the structure and the operation principle of the circuit board 120 can refer to the existing leakage breaker.

Referring to fig. 5 to 9, in the present embodiment, a limiting column 119 is disposed on the base 111, the upper cover 115 is detachably connected to the limiting column 119, and the limiting column 119 is located outside the opening of the notch groove 117 and is used for limiting the L-pole lead 160 or the N-pole lead 140 in the notch groove 117. Specifically, the limiting column 119 is convexly disposed on the base 111 and spans across the middle partition 113, that is, after the assembly is completed, the height of the limiting column 119 is higher than that of the middle partition 113, and the limiting column 119 is located at the opening of the notch groove 117, so that after the middle partition 113 is assembled, the L-pole lead 160 can be limited in a smaller space by the limiting column 119, the limiting effect on the L-pole lead 160 is achieved, the assembly of the upper cover 115 is not affected, and the sealing performance of the L-pole cavity and the N-pole cavity is not affected. In other embodiments, a limiting column 119 is disposed on the upper cover 115, and the base 111 is detachably connected to the limiting column 119.

In this embodiment, a positioning poking piece 1171 is arranged at the opening of the notch groove 117, a positioning groove 1191 is arranged on the outer peripheral surface of the limiting column 119, and the positioning poking piece 1171 is assembled in the positioning groove 1191. Specifically, the positioning poking piece 1171 extends inwards from the edge of the notch groove 117 in an inclined manner, the width of the positioning groove 1191 on the limiting column 119 is matched with the width of the positioning poking piece 1171, when the intermediate partition plate 113 is actually assembled, the intermediate partition plate 113 can be aligned with the base 111, the positioning poking piece 1171 is aligned with the positioning groove 1191 and assembled in the positioning groove 1191, and through the mutual limiting effect between the positioning poking piece 1171 and the positioning groove 1191, the intermediate partition plate 113 can be pre-fixed, and subsequent screw installation is facilitated.

In this embodiment, the limiting column 119 is provided with a screw hole, the upper cover 115 is provided with a connecting hole, and the upper cover 115 and the limiting column 119 are fixed together by a screw. Meanwhile, the base 111 is further provided with a plurality of mounting screw holes, the intermediate partition 113 of the mounting column is correspondingly provided with a plurality of through holes, the upper cover 115 is also correspondingly provided with a plurality of connecting holes, and the upper cover 115, the intermediate partition 113 and the base 111 are fixed together through a plurality of screws. Here, the connection structure between the upper cover 115, the intermediate partition 113 and the base 111 may be referred to an existing earth leakage breaker.

The L pole wiring board 150 includes an L pole mounting portion 151 and an L pole connecting portion 153, the L pole mounting portion 151 is detachably mounted on the L pole outgoing line end base 180, the L pole connecting portion 153 is connected with one end of the L pole mounting portion 151 and is bent to form, the L pole wire 160 is connected with the L pole connecting portion 153, one end of the L pole mounting portion 151, which is far away from the L pole connecting portion 153, is further provided with an L pole stopping edge 155, the width of the L pole stopping edge 155 is greater than that of the L pole mounting portion 151, the L pole stopping edge is used for stopping on the L pole outgoing line end base 180, and the width of the L pole stopping edge 155 is smaller than the inner diameter of the mutual inductor 170. Specifically, the L-pole mounting portion 151 and the L-pole connecting portion 153 are integrally formed and have an L-shaped configuration, and the L-pole lead 160 is spot-welded to the L-pole connecting portion 153.

The N-pole wiring board 130 includes an N-pole mounting portion (not numbered in the drawing) and an N-pole connecting portion (not numbered in the drawing), the N-pole mounting portion is detachably mounted on the N-pole outgoing line terminal block 190, the N-pole connecting portion is connected with one end of the N-pole mounting portion and is arranged in a bent shape, the N-pole wire 140 is connected with the N-pole connecting portion, one end of the N-pole mounting portion away from the N-pole connecting portion is further provided with an N-pole stopping edge, the width of the N-pole stopping edge is greater than that of the N-pole mounting portion, the N-pole connecting portion is used for stopping on the N-pole outgoing line terminal block 190, and the width of the N-pole stopping edge is smaller than the inner diameter of the transformer 170. Specifically, the L-pole mounting portion 151 and the L-pole connecting portion 153 are integrally formed and have an L-shaped configuration, and the L-pole lead 160 is spot-welded to the L-pole connecting portion 153.

In the present embodiment, the L-pole connecting portion 153 is bent in a first direction with respect to the L-pole mounting portion 151, and the N-pole connecting portion is bent in a second direction with respect to the N-pole mounting portion, the first direction and the second direction being opposite to each other, so that the L-pole lead wire 160 and the N-pole lead wire 140 are disposed in a shifted manner. Specifically, the L-pole connecting portion 153 is bent toward the outgoing direction of the L-pole terminal block, and the N-pole connecting portion is bent away from the outgoing direction of the N-pole terminal block, so that the spot welding positions of the L-pole wire 160 and the L-pole terminal block 150 and the spot welding positions of the N-pole wire 140 and the N-pole terminal block 130 are staggered, and mutual interference between the N-pole wire 140 and the L-pole wire 160 during installation is avoided.

In this embodiment, the L-pole wiring board 150 and the N-pole wiring board 130 have substantially the same structure and opposite installation directions, and the surfaces of the L-pole installation part 151 and the N-pole installation part are provided with friction lines to enhance the fixing and installation effect.

In this embodiment, an L-pole coil 181 is further disposed in the L-pole cavity, one end of the L-pole lead 160 is connected to the L-pole coil 181, and the other end is connected to the L-pole wiring board 150; a static contact 191 is also arranged in the N-pole cavity, one end of the N-pole lead 140 is connected with the static contact 191, and the other end is connected with the N-pole wiring board 130.

In the actual assembly, the L-pole terminal plate 150, the L-pole lead wire 160, the L-pole signal wire and the L-pole coil 181 are spot-welded into a whole, then the L-pole terminal plate 150 is passed through the transformer 170 and mounted on the base 111, and then the intermediate partition 113 is mounted, and the L-pole lead wire 160 is required to pass through the notch 117 of the intermediate partition 113 and the transformer 170 is pulled up. Then, the N-pole wiring board 130, the N-pole lead wire 140, the N-pole signal wire 131 and the stationary contact 191, which are previously spot-welded as one body, are mounted, wherein the N-pole wiring board 130 is mounted on the intermediate partition 113 after passing through the transformer 170. Then, the circuit board 120 is mounted, and 4 welding points are arranged on the circuit board 120 and are respectively used for welding the L-pole signal line, the N-pole signal line 131 and the two signal lines of the mutual inductor 170. The circuit board 120 may be soldered and mounted. Finally, the upper cover 115 is mounted to complete the assembly of the integral earth leakage breaker 100.

In summary, in the integrated residual current circuit breaker 100 according to the embodiment, one end of the N-pole lead 140 is welded to the N-pole terminal board 130, one end of the L-pole lead 160 is welded to the L-pole terminal board 150, and the widths of the N-pole terminal board 130 and the L-pole terminal board 150 are both smaller than the inner diameter of the transformer 170. Therefore, the steps of spot welding and then passing through the transformer 170 can be realized, specifically, during actual assembly, the L-pole lead 160 and the L-pole wiring board 150 are spot-welded into a whole, the N-pole lead 140 and the N-pole wiring board 130 are spot-welded into a whole, the L-pole lead 160 and the L-pole wiring board 150 which are spot-welded pass through the transformer 170, the N-pole lead 140 and the N-pole wiring board 130 which are spot-welded pass through the transformer 170, and finally the L-pole wiring board 150 and the N-pole wiring board 130 are fixed in the shell 110. Compared with the prior art, the utility model provides an integral type residual current circuit breaker 100 realizes being connected between wire and the wiring board through the mode of spot welding, compares and strengthens greatly in its fail safe nature of soldering mode to can advance spot welding back and assemble again, avoid the wire to pass mutual-inductor 170 earlier and weld the problem of the assembly difficulty that brings again. The welding device can improve the reliability of products, is simple in assembling and welding processes, is convenient to assemble, and can guarantee the welding effect. In addition, the opening width of the notch groove 117 is smaller than the line diameter of the L-pole lead 160, so that the L-pole lead 160 can quickly and conveniently rotate through the notch groove 117, and is limited by the limiting column 119, the fixing effect of the L-pole lead 160 is further ensured, and the structural stability of the whole device is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An integrated residual current circuit breaker is characterized by comprising a shell (110), an N pole wiring board (130), an N pole lead (140), an L pole wiring board (150), an L pole lead (160) and a mutual inductor (170), the mutual inductor (170) is accommodated in the shell (110), the N pole wiring board (130) and the L pole wiring board (150) are installed in the shell (110) at intervals, the N pole lead (140) and the L pole lead (160) are both arranged in the mutual inductor (170) in a penetrating way, and one end of the N-pole wire (140) is spot-welded to the N-pole wiring board (130), the width of the N-pole wiring board (130) is smaller than the inner diameter of the mutual inductor (170), one end of the L-pole lead wire (160) is spot-welded to the L-pole wiring board (150), and the width of the L-pole wiring board (150) is smaller than the inner diameter of the mutual inductor (170).

2. The integrated residual current circuit breaker according to claim 1, wherein the housing (110) comprises a base (111), a middle partition (113) and an upper cover (115), the base (111) and the upper cover (115) are oppositely disposed at two sides of the middle partition (113), a notch groove (117) is formed at one side edge of the middle partition (113), and the L-pole lead (160) or the N-pole lead (140) is inserted into the notch groove (117).

3. The integrated earth leakage breaker according to claim 2, wherein the opening width of the cutaway groove (117) is larger than the wire diameters of the L-pole lead (160) and the N-pole lead (140).

4. The integrated residual current circuit breaker according to claim 2, wherein the base (111) is provided with a limiting column (119), the upper cover (115) is detachably connected with the limiting column (119), or the upper cover (115) is provided with a limiting column (119), the base (111) is detachably connected with the limiting column (119),

the limiting column (119) is located at an opening of the notch groove (117) and used for limiting the L-pole lead (160) or the N-pole lead (140) in the notch groove (117).

5. The integrated residual current circuit breaker according to claim 4, wherein a positioning poke piece (1171) is arranged at the opening of the notch groove (117), a positioning groove (1191) is arranged on the outer peripheral surface of the limiting column (119), and the positioning poke piece (1171) is assembled in the positioning groove (1191).

6. The integrated residual current circuit breaker according to claim 2, wherein an L-pole cavity is formed between the base (111) and the intermediate partition (113), an L-pole outgoing line terminal block (180) is arranged in the L-pole cavity, the L-pole outgoing line terminal block (180) partially extends out of the L-pole cavity, and the L-pole wiring board (150) is detachably mounted on the L-pole outgoing line terminal block (180) and is electrically connected with the L-pole outgoing line terminal block (180);

an N pole cavity is formed between the upper cover (115) and the middle partition plate (113), an N pole outgoing line end seat (190) is arranged in the N pole cavity, the N pole outgoing line end seat (190) partially extends out of the N pole cavity and is arranged on two sides of the middle partition plate (113) opposite to the L pole outgoing line end seat (180), and an N pole wiring board (130) is detachably mounted on the N pole outgoing line end seat (190) and is electrically connected with the N pole outgoing line end seat (190).

7. Integral residual current circuit breaker according to claim 6, characterized in that said L-pole terminal block (150) comprises an L-pole mounting portion (151) and an L-pole connecting portion (153), the L pole mounting part (151) is detachably mounted on the L pole outgoing line end seat (180), the L pole connecting part (153) is connected with one end of the L pole mounting part (151) and is arranged in a bent shape, the L pole lead (160) is connected with the L pole connecting part (153), one end of the L pole mounting part (151) far away from the L pole connecting part (153) is also provided with an L pole stopping edge (155), the width of the L-pole stopper edge (155) is greater than the width of the L-pole mounting part (151), the L pole stop edge (155) is used for stopping on the L pole outgoing line end seat (180), and the width of the L pole stop edge is smaller than the inner diameter of the mutual inductor (170);

the utility model discloses a transformer, including the utmost point wiring board of N (130), N utmost point wiring board includes the utmost point installation department and the utmost point connecting portion of N, the utmost point installation department detachably of N installs on the utmost point line end socket of N (190), the utmost point connecting portion of N with the one end of the utmost point installation department is connected and is the form setting of bending, N utmost point wire (140) with the utmost point connecting portion of N are connected, the utmost point installation department is kept away from the one end of the utmost point connecting portion of N still is provided with the utmost point flange of N, the width of the utmost point flange of N is greater than the width of the utmost point installation department of N is used for the backstop and is in on the utmost point line end socket of N (190), just the width of the utmost point flange of N is less than the internal diameter of mutual-inductor (170).

8. The integrated earth leakage breaker according to claim 7, wherein the L-pole connecting portion (153) is bent in a first direction with respect to the L-pole mounting portion (151), and the N-pole connecting portion is bent in a second direction with respect to the N-pole mounting portion, the first direction and the second direction being opposite to each other, so that the L-pole lead wire (160) and the N-pole lead wire (140) are disposed in a staggered manner.

9. The integral type residual current circuit breaker according to claim 6, wherein an L pole coil (181) is further provided in the L pole cavity, and one end of the L pole lead (160) is connected to the L pole coil (181) and the other end is connected to the L pole terminal board (150); and a fixed contact (191) is also arranged in the N-pole cavity, one end of the N-pole lead (140) is connected with the fixed contact (191), and the other end of the N-pole lead is connected with the N-pole wiring board (130).

10. The integrated residual current circuit breaker according to any one of claims 1 to 9, wherein a circuit board (120) is further disposed in the housing (110), an L-pole signal line is disposed on the L-pole wiring board (150), an N-pole signal line (131) is disposed on the N-pole wiring board (130), a mutual inductance signal line (171) is disposed on the mutual inductor (170), and the L-pole signal line, the N-pole signal line (131) and the mutual inductance signal line (171) are all connected to the circuit board (120).

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