CN219553545U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker, and belongs to the technical field of electrical equipment. The circuit breaker comprises a middle cover and a surface cover which are mutually attached, wherein an accessory cavity is formed in one side, facing the surface cover, of the middle cover, the accessory cavity is used for installing a circuit breaker accessory, the middle cover and/or the surface cover are/is provided with a wiring groove and an outlet, the wiring groove is further communicated with the accessory cavity, the outlet is further communicated with the outside of the circuit breaker, and the wiring groove is used for accommodating an accessory lead of the circuit breaker accessory. According to the scheme provided by the utility model, the accessory lead can be led to the outlet through the wiring groove and then led out of the circuit breaker from the outlet, namely, the accessory lead can be conveniently led to the outlet with a sufficient space outside the circuit breaker, so that a customer can wire at the outlet, and the difficulty of connecting the accessory of the circuit breaker in a distribution box with limited space can be reduced.

Description

Circuit breaker

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to a circuit breaker.

Background

Circuit breakers are important switching devices in electrical power facilities that are capable of closing, carrying and opening the current in a circuit. When faults such as electric leakage, overload, short circuit and the like occur in the system, the circuit breaker can cut off the circuit through opening the gate so as to prevent the faults from expanding. Circuit breaker accessories such as auxiliary contacts, alarm contacts, shunt release, undervoltage release and the like are generally installed in the circuit breaker so as to enrich the functions of the circuit breaker.

However, when a user installs a circuit breaker including a circuit breaker accessory to a distribution box, there may be a problem in that it is inconvenient to wire the circuit breaker accessory due to a limited space in the distribution box, so that the difficulty of installing the circuit breaker is large.

Disclosure of Invention

In view of the above problems, the embodiments of the present utility model provide a circuit breaker, which can lead an accessory lead to an outlet through a wiring groove, and then to the outside of the circuit breaker from the outlet, that is, it is convenient to lead the accessory lead to the outlet with a relatively large space outside the circuit breaker, so that a customer can wire at the outlet, and the difficulty of user wire connection is reduced.

According to a first aspect of the embodiment of the utility model, a circuit breaker is provided, the circuit breaker comprises a middle cover and a surface cover which are mutually attached, an accessory cavity is formed in one side, facing the surface cover, of the middle cover, the accessory cavity is used for installing a circuit breaker accessory, a wiring groove and an outlet are formed in the middle cover and/or the surface cover, the wiring groove is further communicated with the accessory cavity, the outlet is further communicated with the outside of the circuit breaker, and the wiring groove is used for accommodating an accessory lead of the circuit breaker accessory.

In some embodiments, the accessory cavity is adjacent to one side of the circuit breaker in a first direction and the outlet is located on the other side of the circuit breaker in the first direction.

In some embodiments, the wiring channel includes a main channel having opposite ends, the accessory cavity includes a first accessory cavity and a second accessory cavity aligned in a first direction, one end of the main channel is in communication with the first accessory cavity, and the other end of the main channel is in communication with the second accessory cavity. The outlet comprises a first outlet which is arranged on the cavity wall of the second accessory cavity and is communicated with the inside of the second accessory cavity and the outside of the circuit breaker.

In some embodiments, the wiring trough further comprises a first sub-trough, one end of the first sub-trough being in communication with the main trough, the other end of the first sub-trough being in direct communication with the exterior of the side of the circuit breaker proximate to the second accessory cavity.

In some embodiments, the outlet further comprises a second outlet disposed on a wall of the first accessory cavity, and the second outlet communicates between the interior of the first accessory cavity and the exterior of the circuit breaker.

In some embodiments, the wiring trough further comprises a second sub-trough, one end of the second sub-trough being in communication with the main trough, the other end of the second sub-trough being in direct communication with the exterior of the side of the circuit breaker proximate to the first accessory cavity.

In some embodiments, the main channel is a U-shaped structure.

In some embodiments, the circuit breaker further comprises an accessory backpack connected to a side of the middle cap proximate the outlet, the accessory backpack having a plurality of wiring ports for electrical connection with accessory leads.

In some embodiments, the side of the accessory backpack facing the middle cover is provided with a buckle, the side of the middle cover facing the accessory backpack is provided with a clamping groove, and the buckle is matched with the clamping groove.

In some embodiments, the circuit breaker accessory is at least one of an auxiliary contact, an alarm contact, a shunt release, an under-voltage release.

The foregoing description is only an overview of the technical solutions of the embodiments of the present utility model, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present utility model can be more clearly understood, and the following specific embodiments of the present utility model are given for clarity and understanding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a circuit breaker according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a circuit breaker with a first configuration of a wiring slot according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram of a circuit breaker when the wiring groove provided in the embodiment of the utility model is of a second structure.

Fig. 4 is a schematic diagram of a circuit breaker when the wiring groove provided in the embodiment of the utility model is of a third structure.

Fig. 5 is a schematic diagram of a circuit breaker when the wiring groove provided in the embodiment of the utility model is of a fourth structure.

Fig. 6 is a schematic diagram of a circuit breaker with a fifth configuration of a wiring slot according to an embodiment of the present utility model.

Fig. 7 is a schematic diagram of a circuit breaker with a sixth configuration of a wiring slot according to an embodiment of the present utility model.

Fig. 8 is a schematic structural diagram of a circuit breaker including an accessory backpack according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a housing; 11. a base; 12. a middle cover; 121. an accessory cavity; 1211. a first accessory cavity; 1212. a second accessory cavity; 13. a face cover; 2. wiring grooves; 21. a main groove; 22. a first sub-tank; 23. a second sub-tank; K. a wire outlet; k1, a first outlet; k2, a second outlet; 3. an accessory backpack; 31. a wiring port; x, first direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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 utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description and claims of the utility model and in the description of the drawings are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the circuit breaker of the present utility model. For example, in the description of the present utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Further, expressions such as the X direction indicating directions for explaining the operations and the construction of the respective members of the circuit breaker of the present embodiment are not absolute but relative, and although these indications are proper when the respective members of the circuit breaker are in the positions shown in the drawings, when these positions are changed, these directions should be interpreted differently to be changed correspondingly.

Furthermore, the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to improve one or more of these features either explicitly or implicitly.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as a "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., as a fixed connection, e.g., via a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is an exploded view of a circuit breaker according to an embodiment of the present utility model, as shown in fig. 1, the circuit breaker includes a housing 1, the housing 1 includes a base 11, a middle cover 12, and a cover 13, after the base 11 and the middle cover 12 are covered, an internal space for installing an operating mechanism, a contact mechanism, and other structures can be formed, and the cover 13 is covered on the middle cover 12, and is used for shielding structural members disposed on a side of the middle cover 12 facing away from the base 11, so as to protect the structural members.

As shown in fig. 1, the side of the middle cover 12 facing the face cover 13 has an accessory cavity 121, the accessory cavity 121 being used for mounting a circuit breaker accessory (not shown in the figures). The number of accessory cavities 121 is at least one, each accessory cavity 121 being usable for mounting one circuit breaker accessory, each circuit breaker accessory having accessory leads for user wiring, the number of accessory leads for one circuit breaker accessory being 2, 3, etc. The breaker accessory can be at least one of an auxiliary contact, an alarm contact, a shunt release and an undervoltage release.

In general, when the cover 13 is covered on the middle cover 12 to shield the accessories of the circuit breaker, the rest of the middle cover 12 except for the accessory cavity 121 is mutually attached to the cover 13, so that no wiring can be performed between the cover 13 and the middle cover 12. The position a may be a first side of the circuit breaker along the first direction X (hereinafter, for simplicity of description, the first side of the circuit breaker along the first direction X will be referred to simply as a first side), and the other side may be a second side of the circuit breaker along the first direction X (hereinafter, for simplicity of description, the second side of the circuit breaker along the first direction X will be referred to simply as a second side), the first side being opposite to the second side, and the first direction X may be any direction.

In view of this, the present utility model provides the middle cover 12 and/or the face cover 13 with the wiring groove 2 and the outlet K, the wiring groove 2 is also communicated with the accessory cavity 121, the outlet K is also communicated with the exterior of the circuit breaker, and the wiring groove 2 is used for accommodating the accessory lead of the circuit breaker accessory.

Illustratively, the wiring groove 2 and the outlet K may be provided at a side of the middle cap 12 facing the face cap 13. Alternatively, the wiring groove 2 and the outlet K may be provided at a side of the face cover 13 toward the middle cover 12. Alternatively, the wiring groove 2 and the outlet K may be formed in two halves, and a part of the wiring groove 2 and the outlet K may be disposed on a side of the middle cover 12 facing the face cover 13, and another part of the wiring groove 2 and the outlet K may be disposed on a side of the face cover 13 facing the middle cover 12. Alternatively, the wiring groove 2 and the outlet K may be disposed in other manners, for example, one of the wiring groove 2 and the outlet K is disposed on a side of the middle cover 12 facing the face cover 13, and the other is disposed on a side of the face cover 13 facing the middle cover 12, which is not limited in the embodiment of the present utility model.

The cross-sectional shapes of the wiring groove 2 and the outlet K may be circular, square, trapezoidal, or the like. The number of the wiring grooves 2 and the wire outlets K may be 1, 2, etc., the wiring grooves 2 may extend substantially along the first direction X, when the number of the wiring grooves 2 and the wire outlets K is 1, the accessory cavity 121 is located at one side of the middle cover 12 or the face cover 13 along the first direction X, the wire outlets K are located at the other side of the middle cover 12 or the face cover 13 along the first direction X, and accessory leads extending from the accessory cavity 121 located at one side of the first direction X may be led from the wiring grooves 2 and the wire outlets K to an external space of the circuit breaker close to the other side of the first direction X; when the number of the wiring grooves 2 and the outlets K is plural, the accessory leads can be selectively led out of the circuit breaker through the proper wiring grooves 2 and outlets K according to the size of the external space of the circuit breaker, which is not limited in the utility model.

In the embodiment of the utility model, the wiring groove 2 and the outlet K are arranged on the middle cover 12 and/or the face cover 13, so that a space for accommodating the accessory lead is formed between the middle cover 12 and the face cover 13, the external end of the accessory lead can extend from the accessory cavity 121 to the wiring groove 2 and then extend out of the circuit breaker through the outlet K, that is, the accessory lead can be conveniently led to the outlet K with enough external space of the circuit breaker, so that a customer can wire at the outlet K, and the difficulty of connecting the accessory of the circuit breaker in a distribution box with limited space can be reduced. Specifically, the external connection end of the accessory lead can be led to the second side of the first direction X from the accessory cavity 121 on the first side of the first direction X, and the external connection end of the accessory lead can be led to the first side of the first direction X from the accessory cavity 121 on the second side of the first direction X, so that a customer can wire the accessory lead extending from the accessory cavity 121 on the first side on the second side of the first direction X, and can wire the accessory lead extending from the accessory cavity 121 on the second side on the first side of the first direction X, thereby improving flexibility and selectivity of the wire connection position, reducing the difficulty of wire connection of the user and reducing the installation difficulty of the circuit breaker.

The structural form of the wiring groove 2 in the present utility model will be described in detail with reference to fig. 2 to 7.

Fig. 2 is a schematic diagram of a circuit breaker when the wiring groove 2 is of a first structure, and when the wiring groove 2 is of a first structure, as shown in fig. 2, the accessory cavity 121 is close to one side of the circuit breaker along the first direction X, and the outlet K is located on the other side of the circuit breaker along the first direction X. The wiring groove 2 comprises two opposite ends, one end of the wiring groove 2 is communicated with the accessory cavity 121 near one side of the first direction X, and the other end of the wiring groove 2 is communicated with the outlet K near the other side of the first direction X.

By the wiring groove 2 with the structure, the accessory lead extending from the accessory cavity 121 near one side of the first direction X can extend to the other side of the circuit breaker along the first direction X through the wiring groove 2, so that the wiring difficulty of a user can be reduced when the circuit breaker with the wiring groove 2 with the structure is installed to a distribution box, and the space for wiring can be saved without reserving at the first side if one end of the wiring groove 2 is communicated with the accessory cavity 121 at the first side and the other end is directly communicated with the outside at the second side.

Fig. 3 is a schematic diagram of a circuit breaker when the wiring groove 2 is of a second structure, and when the wiring groove 2 is of a second structure, as shown in fig. 3, the wiring groove 2 includes a main groove 21, the main groove 21 has opposite ends, the accessory cavity 121 includes a first accessory cavity 1211 and a second accessory cavity 1212 arranged along a first direction X, one end of the main groove 21 is communicated with the first accessory cavity 1211, and the other end of the main groove 21 is communicated with the second accessory cavity 1212. The outlet K comprises a first outlet K1, the first outlet K1 is arranged on the cavity wall of the second accessory cavity 1212, and the first outlet K1 is communicated with the inside of the second accessory cavity 1212 and the outside of the circuit breaker.

As shown in fig. 3, the main groove 21 may have a U-shaped structure, and two openings of the U-shaped structure are two ends of the main groove 21. Since the side of the middle cover 12 facing the face cover 13 is further provided with an operation cavity for accommodating the operation mechanism of the circuit breaker, and the operation cavity is located between the first accessory cavity 1211 and the second accessory cavity 1212 along the first direction X, the main groove 21 is provided with a U-shaped structure, so that an avoidance space can be provided for the operation mechanism while the first accessory cavity 1211 and the second accessory cavity 1212 are communicated.

With the wiring groove 2 of this structure, accessory leads extending from the first accessory chamber 1211, through the main groove 21 to the opposite second accessory chamber 1212, and out of the circuit breaker from the first outlet K1 can be made. It should be noted that, in the case of the circuit breaker having the wiring groove 2 of this structure, the circuit breaker accessory located in the second accessory cavity 1212 may directly draw the accessory lead out of the circuit breaker from the first outlet K1. It can be seen that the accessory leads extending from the first accessory cavity 1211 and the second accessory cavity 1212 can be led out of the circuit breaker from the first outlet K1 near the side of the second accessory cavity 1212, so that when the circuit breaker with the wiring groove 2 with the structure is installed to the distribution box, the space for wiring is not reserved near the side of the first accessory cavity 1211, and occupation of the internal space of the distribution box is saved.

Based on the embodiment shown in fig. 3, fig. 4 is a schematic diagram of the circuit breaker when the wiring groove 2 provided in the embodiment of the present utility model is in the third structure, and when the wiring groove 2 is in the third structure, as shown in fig. 4, the wiring groove 2 further includes a first sub-groove 22, one end of the first sub-groove 22 is communicated with the main groove 21, and the other end of the first sub-groove 22 is directly communicated with the outside of the circuit breaker on the side close to the second accessory cavity 1212.

First sub-slot 22 can be in communication with a side of main slot 21 adjacent to second accessory cavity 1212, for example, first sub-slot 22 can be in communication with a bend in the U-shaped configuration of main slot 21 as in FIG. 4, and can be collinear with a middle portion of main slot 21.

By the wiring groove 2 with the structure, accessory leads extending from the first accessory cavity 1211 can extend to the opposite second accessory cavity 1212 through the main groove 21 and then extend out of the circuit breaker from the first wire outlet K1, and can extend to the opposite first sub-groove 22 through the main groove 21 and then extend out of the circuit breaker from the first sub-groove 22, so that more ways of leading out the accessory leads extending from the first accessory cavity 1211 to the outside of the circuit breaker are provided.

Wherein, the mode that the first sub-groove 22 extends out of the circuit breaker does not need to bend the accessory lead for a plurality of times, so that the efficiency that the accessory lead extending out of the first accessory cavity 1211 extends out of the circuit breaker can be improved; also, where the circuit breaker accessories in both the first accessory cavity 1211 and the second accessory cavity 1212 are fitted with circuit breaker accessories, and both require accessory leads to extend out of the circuit breaker from the side proximate to the second accessory cavity 1212, this reduces the likelihood of accessory leads extending from both accessory cavities 121 interfering within the second accessory cavity 1212.

Fig. 5 is a schematic diagram of a circuit breaker with the fourth configuration of the wiring groove 2 according to the embodiment of the present utility model, when the wiring groove 2 has the fourth configuration, as shown in fig. 5, the outlet K further includes a second outlet K2, the second outlet K2 is disposed on the wall of the first accessory cavity 1211, and the second outlet K2 communicates with the inside of the first accessory cavity 1211 and the outside of the circuit breaker.

By the wiring groove 2 with the structure, accessory leads extending from the second accessory cavity 1212 can extend to the first accessory cavity 1211 through the main groove 21 and then extend out of the circuit breaker from the second wire outlet K2, so that more ways for the accessory leads extending from the second accessory cavity 1212 to be led out of the circuit breaker are provided.

With the wiring trough 2 of this configuration in conjunction with the fig. 3 embodiment, accessory leads of circuit breaker accessories in first accessory cavity 1211 and second accessory cavity 1212 may each be led out of the circuit breaker from first outlet K1 on a side proximate to second accessory cavity 1212, or may each be led out of the circuit breaker from second outlet K2 on a side proximate to first accessory cavity 1211. Therefore, for the circuit breaker with the wiring groove 2 with the structure, when the circuit breaker is installed to the distribution box, the space for wiring can be reserved on any one of the side close to the first accessory cavity 1211 and the side close to the second accessory cavity 1212, so that not only can the occupation of the internal space of the distribution box be saved, but also the installation direction of the circuit breaker is not considered when the circuit breaker is installed, and the difficulty of installing the circuit breaker to the distribution box is reduced.

Fig. 6 is a schematic diagram of a circuit breaker when the wiring groove 2 provided in the embodiment of the present utility model is in a fifth structure, and when the wiring groove 2 is in the fifth structure, as shown in fig. 6, the wiring groove 2 further includes a second sub-groove 23, one end of the second sub-groove 23 is communicated with the main groove 21, and the other end of the second sub-groove 23 is directly communicated with the outside of the circuit breaker on the side close to the first accessory cavity 1211.

The second sub-groove 23 may communicate with a side of the main groove 21 near the first accessory chamber 1211, for example, the second sub-groove 23 may communicate with a bent portion of the U-shaped structure of the main groove 21 as in fig. 6, and may be collinear with a middle portion of the main groove 21.

By the wiring groove 2 with the structure, accessory leads extending from the second accessory cavity 1212 can extend to the opposite side of the first accessory cavity 1211 through the main groove 21 and then extend out of the circuit breaker from the second wire outlet K2, and can extend to the opposite side of the second sub groove 23 through the main groove 21 and then extend out of the circuit breaker from the second sub groove 23, so that more ways for the accessory leads extending from the second accessory cavity 1212 to be led out of the circuit breaker are provided.

Wherein, the accessory lead wire extending out of the circuit breaker through the second sub-groove 23 does not need to be bent for a plurality of times, so that the efficiency of extending the accessory lead wire extending out of the circuit breaker of the second accessory cavity 1212 can be improved; also, where the circuit breaker accessories in first accessory cavity 1211 and second accessory cavity 1212 are both mounted with circuit breaker accessories and both require accessory leads to extend out of the circuit breaker from a side proximate to first accessory cavity 1211, this reduces the likelihood of accessory leads extending from both accessory cavities 121 interfering within first accessory cavity 1211.

Referring to fig. 3 to 6, as shown in fig. 7, the embodiment of the present utility model further provides a schematic diagram of a circuit breaker with a sixth configuration of the wiring slot 2, through the wiring slot 2 in the embodiment of fig. 7, the accessory lead extending from the second accessory cavity 1212 not only can extend to the opposite first accessory cavity 1211 through the main slot 21, but also can extend to the opposite second sub slot 23 through the main slot 21, and then extend to the outside of the circuit breaker through the second sub slot 23; similarly, the accessory lead extending from the first accessory cavity 1211 can extend to the opposite second accessory cavity 1212 through the main slot 21, extend to the outside of the circuit breaker from the first outlet K1, extend to the opposite first sub-slot 22 through the main slot 21, and extend to the outside of the circuit breaker from the first sub-slot 22. When an operator installs the circuit breaker to the distribution box, the direction and the space problem do not need to be considered, the installation difficulty is effectively reduced, the installation efficiency of the circuit breaker is improved, and in addition, the installation space of the distribution box is saved.

Fig. 8 is a schematic structural diagram of a circuit breaker including an accessory backpack 3 according to an embodiment of the present utility model, and as shown in fig. 8, the circuit breaker may further include an accessory backpack 3, wherein the accessory backpack 3 is connected to a side of the middle cover 12 near the outlet K, and the accessory backpack 3 has a plurality of connection ports 31, and the connection ports 31 are used for electrically connecting with accessory leads.

The accessory backpack 3 is used to provide a connection port 31 for a user to electrically connect accessory leads of the circuit breaker accessory to the user's side through the connection port 31. One accessory backpack 3 may be provided with a plurality of wiring ports 31, and the accessory backpack 3 shown in fig. 8 includes 6 wiring ports 31, but fig. 8 does not constitute a limitation on the number of wiring ports 31. One circuit breaker may be connected with one accessory backpack 3, which accessory backpack 3 may be connected to a side of the circuit breaker in the first direction X at a larger distance from the distribution box, of course, the circuit breaker may also be connected with two accessory backpacks 3, which accessory backpacks 3 may be connected to different sides of the circuit breaker in the first direction X. One accessory backpack 3 may be connected to one or more circuit breaker accessories on one side of the circuit breaker in the first direction X, which may promote versatility of the circuit breaker accessories in the first accessory cavity 1211 and the second accessory cavity 1212.

Taking the number of accessory backpacks 3 as one example, in some embodiments, the side of the accessory backpack 3 facing the middle cover 12 may be provided with a buckle, and the side of the middle cover 12 facing the accessory backpack 3 may be provided with a clamping groove; alternatively, the side of the accessory backpack 3 facing the middle cover 12 may be provided with a catch groove, and the side of the middle cover 12 facing the accessory backpack 3 may be provided with a buckle. The clasp and the slot are mutually matched, and both sides of the accessory backpack 3 and the middle cover 12 along the first direction X can be connected through the clasp and the slot.

In embodiments of the present utility model, accessory leads, whether extending out of the circuit breaker from first outlet K1 or first slot 22, can be electrically connected to wiring ports 31 of accessory backpack 3 connected to the side of the circuit breaker adjacent to second accessory cavity 1212. Similarly, the accessory lead, whether it extends from the second outlet K2 or the second slot 23 to the outside of the circuit breaker, can be electrically connected to the wiring port 31 of the accessory backpack 3 connected to the side of the circuit breaker near the first accessory chamber 1211, improving the convenience for wiring accessories of the circuit breaker outside the circuit breaker.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A circuit breaker, comprising: the middle cover and the face cover are mutually attached, an accessory cavity is formed in one side, facing the face cover, of the middle cover, the accessory cavity is used for installing accessories of the circuit breaker, the middle cover and/or the face cover are/is provided with a wiring groove and an outlet, the wiring groove is further communicated with the accessory cavity, the outlet is further communicated with the outside of the circuit breaker, and the wiring groove is used for accommodating accessory leads of the accessories of the circuit breaker.

2. The circuit breaker of claim 1, wherein the accessory cavity is adjacent to one side of the circuit breaker in a first direction, and the outlet is located on the other side of the circuit breaker in the first direction.

3. The circuit breaker of claim 1, wherein the wiring trough comprises a main trough having opposite ends, the accessory cavity comprising a first accessory cavity and a second accessory cavity aligned in a first direction, one end of the main trough communicating with the first accessory cavity and the other end of the main trough communicating with the second accessory cavity;

the outlet comprises a first outlet which is arranged on the cavity wall of the second accessory cavity and is communicated with the inside of the second accessory cavity and the outside of the circuit breaker.

4. The circuit breaker of claim 3, wherein the wiring slot further comprises a first sub-slot, one end of the first sub-slot being in communication with the main slot, the other end of the first sub-slot being in direct communication with the exterior of the circuit breaker on a side proximate to the second accessory cavity.

5. The circuit breaker of claim 3, wherein the outlet further comprises a second outlet disposed in a wall of the first accessory cavity, and the second outlet communicates between the interior of the first accessory cavity and the exterior of the circuit breaker.

6. The circuit breaker of claim 5, wherein the wiring slot further comprises a second sub-slot, one end of the second sub-slot being in communication with the main slot, the other end of the second sub-slot being in direct communication with the exterior of the circuit breaker on a side proximate the first accessory cavity.

7. The circuit breaker according to any one of claims 3 to 6, wherein the main slot is of U-shaped configuration.

8. The circuit breaker of claim 1, further comprising an accessory backpack connected to a side of the middle cap proximate the outlet, the accessory backpack having a plurality of wiring ports for electrical connection with the accessory leads.

9. The circuit breaker of claim 8, wherein a side of the accessory backpack facing the middle cover is provided with a catch, and a side of the middle cover facing the accessory backpack is provided with a catch slot, the catch and the catch slot cooperating with each other.

10. The circuit breaker of claim 1, wherein the circuit breaker accessory is at least one of an auxiliary contact, an alarm contact, a shunt release, an under-voltage release.