CN219180447U - Circuit breaker - Google Patents

Abstract

The application provides a circuit breaker, which comprises a shell, wherein the shell is provided with a first accommodating chamber, a second accommodating chamber and a through hole which is communicated with the first accommodating chamber and the second accommodating chamber; the arc striking piece is arranged in the first accommodating cavity and is provided with a first end part and a second end part far away from the first end part; the circuit board is arranged in the accommodating cavity and is provided with a first electric connection part; wherein, install the electric connection piece in the through-hole, electric connection piece one end is connected with first end electricity, and other end is connected with first electric connection portion electricity. The circuit board and the arc striking piece are electrically connected to generate poor contact and even break in the opening and closing process of the circuit breaker, so that the circuit breaker can be guaranteed to operate stably.

Description

Circuit breaker

Technical Field

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

Background

At present, in order to realize additional functions such as residual current protection and shunt, a circuit breaker generally needs to detect, process and feed back electric signals in a circuit through a current transformer, and automatic switching-off is realized by utilizing a tripping coil so as to ensure the safety of the circuit breaker. Because the current transformer and the tripping coil are required to be provided with corresponding circuit boards for control, the circuit boards are required to be provided with power to ensure the normal operation of the circuit boards.

In the prior art, a circuit board of a circuit breaker is connected to a static contact in the circuit breaker through a wire, and in the opening and closing process of the circuit breaker, a moving contact knocks the static contact and generates a vibration phenomenon, and the vibration phenomenon easily causes the phenomenon that the electrical connection between the circuit board and the static contact is poor in contact and even is broken.

Disclosure of Invention

The application provides a circuit breaker, aims at solving the technical problem that the switching-on and switching-off process of the current circuit breaker is easy to cause poor contact and even circuit breaking of electric connection of a circuit board.

The application provides a circuit breaker, including:

a housing having a first accommodation chamber, a second accommodation chamber, and a through hole communicating the first accommodation chamber and the second accommodation chamber;

the arc striking piece is arranged in the first accommodating cavity and is provided with a first end part and a second end part, wherein the first end part is used for being close to the arc extinguishing chamber, and the second end part is far away from the first end part;

the circuit board is arranged in the second accommodating cavity and is provided with a first electric connection part;

wherein, install the electric connection piece in the through-hole, electric connection piece one end is connected with first end electricity, and other end is connected with first electric connection portion electricity.

In some embodiments, the first end extends in a first direction and the second end extends in a second direction;

wherein, the first direction and the second direction are in a preset included angle.

In some embodiments, the first direction is perpendicular to the second direction.

In some embodiments, the second end is provided with a first connection hole opposite the through hole;

the first electric connecting part is provided with a second connecting hole opposite to the through hole, one end of the electric connecting piece stretches into the first accommodating cavity and is electrically connected with the first connecting hole, and the other end stretches into the second accommodating cavity and is electrically connected with the second connecting hole.

In some embodiments, the electrical connector comprises a column, a first connecting column and a second connecting column respectively positioned at two ends of the column;

the diameter of the cylinder is greater than that of the first connecting column and the second connecting column, the diameter of the cylinder is equal to that of the through hole, the first connecting column stretches into the first connecting hole and is electrically connected, and the second connecting column stretches into the second connecting hole and is electrically connected.

In some embodiments, the first connection post is welded to the first connection hole and the second connection post is welded to the second connection hole.

In some embodiments, the through hole, the first connection hole, and the second connection hole are coaxially disposed.

In some embodiments, the first electrical connection is provided with a first plug connector, the electrical connection comprising a wire and a second plug connector;

one end of the lead is electrically connected with the second end part, the other end of the lead is electrically connected with the second plug connector, and the second plug connector stretches into the second accommodating cavity and is matched with the first plug connector.

In some embodiments, a second electrical connection is further provided on the circuit board, the housing further has a third receiving chamber, the second receiving chamber being located between the first receiving chamber and the third receiving chamber;

and a wiring terminal is arranged in the third accommodating chamber, and is connected with a lead wire which is electrically connected with the second electric connecting part.

In some embodiments, the housing includes a first housing piece and a second housing piece that interface with each other;

the through holes comprise a first through hole in the first housing part and a second through hole in the second housing part;

one end of the electric connecting piece passes through the first through hole to be electrically connected with the first electric connecting part, and the lead wire passes through the second through hole to be electrically connected with the second electric connecting part.

This application is through installing the circuit board in the casing to utilize electric connection spare to connect circuit board and striking piece, because the second tip of striking piece is connected to electric connection spare, and the second tip is kept away from in the first tip that is close to the explosion chamber, in the circuit breaker carries out divide-shut brake in-process, can reduce the vibrations that are transmitted to the second tip by moving contact striking stationary contact, and then can avoid producing the phenomenon of poor contact even breaking circuit with the electricity of striking piece in the divide-shut brake in-process of circuit breaker, be favorable to guaranteeing the steady operation of circuit breaker.

Drawings

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

FIG. 1 is a schematic view of a housing provided in an embodiment of the present application;

FIG. 2 is a schematic view of a first housing member on a side of a second receiving chamber provided in an embodiment of the present application;

FIG. 3 is a schematic view of a first housing member on a side of a first receiving chamber provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of a circuit board provided in an embodiment of the present application;

FIG. 5 is a schematic view of an arc striking plate provided in an embodiment of the present application;

FIG. 6 is a schematic view of one configuration of an electrical connector provided in an embodiment of the present application;

FIG. 7 is another schematic view of the first housing member provided in the embodiments of the present application on the side of the second receiving chamber;

FIG. 8 is another schematic view of the first housing member provided in the embodiments of the present application on one side of the first receiving chamber;

FIG. 9 is another schematic structural view of a circuit board provided in an embodiment of the present application;

FIG. 10 is a schematic view of an arc striking plate and electrical connector provided in an embodiment of the present application;

fig. 11 is a schematic structural view of a connection terminal provided in an embodiment of the present application;

FIG. 12 is a schematic view of a construction of a first housing member provided in an embodiment of the present application;

fig. 13 is a schematic structural view of a second housing member provided in an embodiment of the present application.

Wherein 10 housing, 111 first receiving chamber, 112 second receiving chamber, 113 second receiving chamber, 12 through hole, 121 first through hole, 122 second through hole, 101 first housing piece, 102 second housing piece, 103 third housing piece, 104 fourth housing piece;

20 arc striking pieces, 21 first end parts, 22 second end parts, 221 first connecting holes;

30 circuit boards, 31 first electrical connection parts, 311 second connection holes, 312 first plug connectors, 32 second electrical connection parts;

40 electrical connectors, 41 posts, 42 first connector posts, 43 second connector posts, 401 wires, 402 second connectors;

50 terminals, 51 leads.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. 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 fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiment of the application provides a circuit breaker, and the circuit breaker is described in detail below.

First, referring to fig. 1, 2, 3, 4 and 5, fig. 1 shows a schematic structural diagram of a housing 10 in an embodiment of the present application, fig. 2 shows a schematic structural diagram of a first housing member 101 on a side of a second accommodating chamber 112 in an embodiment of the present application, fig. 3 shows a schematic structural diagram of a first housing member 101 on a side of a first accommodating chamber 111 in an embodiment of the present application, fig. 4 shows a schematic structural diagram of a circuit board 30 in an embodiment of the present application, and fig. 5 shows a schematic structural diagram of an arc striking plate 20 in an embodiment of the present application, wherein a circuit breaker includes:

a housing 10, the housing 10 having a first accommodation chamber 111, a second accommodation chamber 112, and a through hole 12 communicating the first accommodation chamber 111 and the second accommodation chamber 112;

an arc striking plate 20, the arc striking plate 20 being installed in the first accommodating chamber 111, the arc striking plate 20 having a first end 21 close to the arc extinguishing chamber and a second end 22 far from the first end 21;

a circuit board 30, the circuit board 30 being mounted in the second accommodating chamber 112, the circuit board 30 having a first electrical connection portion 31;

wherein, an electrical connector 40 is installed in the through hole 12, one end of the electrical connector 40 is electrically connected with the first end 21, and the other end is electrically connected with the first electrical connection portion 31.

Specifically, the housing 10 is made of an insulating material for mounting the striking plate 20 in the first accommodating chamber 111 thereof and the circuit board 30 in the second accommodating chamber 112 thereof, so as to ensure electrical isolation of the circuit board 30 from other conductive structures (e.g., the stationary contact, the moving contact, the striking plate 20, etc.) of the circuit breaker. The through hole 12 on the housing 10 may enable the electrical connector 40 to extend from the outside of the housing 10, so as to electrically connect the circuit board 30 with the arc striking plate 20 outside the housing 10, and the through hole 12 may be, for example, circular, square, or regular polygon.

In some embodiments of the present application, referring to fig. 1, the housing 10 includes a first housing member 101, a second housing member 102, a third housing member 103, and a fourth housing member 104 that are abutted to each other, the third housing member 103 being located on a side of the first housing member 101 facing away from the second housing member 102, the fourth housing member 104 being located on a side of the second housing member 102 facing away from the first housing member 101, the first housing member 101 and the second housing member 102 being abutted to form a second receiving chamber 112, the third housing member 103 and the first housing member 101 being abutted to form a first receiving chamber 111, so as to mount the circuit board 30 in the second receiving chamber 112, and mount the striking plate 20 in the first receiving chamber 111.

It will be appreciated that the above-described housing 10 is assembled by abutting the first, second, third and fourth housing members 101, 102, 103 and 104 in a horizontal direction, and that in practice a greater number of housing members may be abutted in different directions to form a housing 10 having first and second receiving chambers 111, 112.

The striking plate 20 is a conductive structure for flowing current in the circuit breaker, and the striking plate 20 is located in the first receiving chamber 111 and is close to the arc extinguishing chamber of the circuit breaker so as to extinguish the arc as soon as possible by the striking plate 20. The striking plate 20 has a first end 21 close to the arc extinguishing chamber and a second end 22 far away from the first end 21, and since the first end 21 and the second end 22 are far away from each other, the vibration transferred from the static contact to the second end 22 can be reduced, and the reliability of the electrical connection between the circuit board 30 and the electrical connector 40 can be ensured.

In some embodiments of the present application, referring to fig. 5, the first end 21 extends in a first direction and the second end 22 extends in a second direction. Wherein, the first direction and the second direction are in a preset included angle. Preferably, the first direction and the second direction are perpendicular to each other, for example, the first end 21 extends along the horizontal direction, the second end 22 extends along the vertical direction, when the striking plate 20 receives the vibration of the static contact, the first end 21 vibrates along the vertical direction, and the vibration along the vertical direction will not cause the second end 22 extending along the vertical direction to generate a large vibration phenomenon, so that the vibration influence of the first end 21 is further isolated, and the phenomenon that the second end 22 and the electric connector 40 generate poor contact or even break is avoided.

The circuit board 30 may electrically interconnect the electronic components within the circuit breaker to monitor and control the operating state of the circuit breaker. For example, the circuit board 30 may control the current transformer to detect, process and feed back electrical signals in the circuit breaker lines, and utilize trip coils to achieve automatic switching-off to ensure circuit breaker safety. In some embodiments of the present application, the circuit board 30 has a through hole, the housing 10 has a limiting post corresponding to the through hole, and the circuit board 30 can be fixed in the housing 10 through the cooperation of the limiting post and the through hole. Illustratively, the circuit board 30 may be a single-panel, double-panel, or multi-layer board.

In this application embodiment, this application is through installing circuit board 30 in casing 10 to utilize electric connection piece 40 to connect circuit board 30 and striking piece 20, because electric connection piece 40 connects the second tip 22 of striking piece 20, and second tip 22 is kept away from in the first tip 21 that is close to the explosion chamber, in the circuit breaker divide-shut brake in-process, can reduce the vibrations that are transmitted to second tip 22 by moving contact striking stationary contact, and then can avoid producing the phenomenon of poor contact even breaking circuit with the electricity of striking piece 20 at the divide-shut brake in-process of circuit breaker circuit board 30, be favorable to guaranteeing the steady operation of circuit breaker.

Referring to fig. 4, 5 and 6, fig. 6 shows a schematic structural view of the electrical connector 40 according to the embodiment of the present application, wherein the second end 22 is provided with a first connection hole 221 opposite to the through hole 12. The first electrical connection part 31 is provided with a second connection hole 311 opposite to the through hole 12, and one end of the electrical connection member 40 extends into the first accommodating chamber 111 and is engaged with the first connection hole 221, and the other end extends into the second accommodating chamber 112 and is engaged with the second connection hole 311. That is, both ends of the electric connector 40 are inserted into the first connection hole 221 and the second connection hole 311, respectively, so that the electric connection between the circuit board 30 and the striking plate 20 can be ensured while both ends of the electric connector 40 are fixed. Illustratively, both ends of the electrical connector 40 may be welded in the first and second connection holes 221 and 311, respectively, to ensure connection stability of the electrical connector 40.

Further, in some embodiments of the present application, for example, for embodiments in which one end of the electrical connector 40 extends into the first accommodating chamber 111 and mates with the first connecting hole 221, and the other end extends into the second accommodating chamber 112 and mates with the second connecting hole 311, continuing to refer to fig. 4, 5 and 6, wherein the electrical connector 40 includes a post 41, a first connecting post 42 and a second connecting post 43 respectively located at two ends of the post 41. The diameter of the column body 41 is larger than the diameters of the first connection column 42 and the second connection column 43, and the diameter of the column body 41 is equal to the diameter of the through hole 12, the first connection column 42 extends into the first connection hole 221 and is electrically connected, and the second connection column 43 extends into the second connection hole 311 and is electrically connected. Wherein the diameter of the column 41 is relatively thick and matches the diameter of the through hole 12, so that the structural strength of the electrical connector 40 can be ensured and the electrical connector can be stably mounted in the through hole 12. Meanwhile, the first and second connection posts 42 and 43 are provided at both ends of the column body 41, respectively, so that the first and second connection posts 42 and 43 can be reliably connected with the first and second connection holes 221 and 311. It should be understood that the electrical connector 40 may be directly formed as a cylinder with the same diameter, and then both ends of the cylinder may be welded to the first connection hole 221 and the second connection hole 311, respectively.

Further, the first connecting post 42 is welded to the first connecting hole 221, and the second connecting post 43 is welded to the second connecting hole 311, so as to further improve the stability of the electrical connector 40 for connecting the circuit board 30 and the striking plate 20.

In some embodiments of the present application, the through hole 12, the first connection hole 221 and the second connection hole 311 are coaxially disposed, and the column body 41, the first connection column 42 and the second connection column 43 are coaxially disposed, so that the electrical connector 40 installed in the through hole 12 is more conveniently connected with the first connection hole 221 and the second connection hole 311.

As another exemplary embodiment, referring to fig. 7, 8, 9 and 10, fig. 7 shows another schematic structural view of the first housing member 101 on the side of the second accommodating chamber 112 in the embodiment of the present application, fig. 8 shows another schematic structural view of the first housing member 101 on the side of the first accommodating chamber 111 in the embodiment of the present application, fig. 9 shows another schematic structural view of the circuit board 30 in the embodiment of the present application, fig. 10 shows one schematic structural view of the striking plate 20 and the electrical connector 40 in the embodiment of the present application, the first electrical connector 31 is provided with the first plug connector 312, and the electrical connector 40 includes the conductive wire 401 and the second plug connector 402. The wire 401 is electrically connected at one end to the second end 22 and at the other end to the second connector 402, the second connector 402 extending into the second receiving chamber 112 and mating with the first connector 312. The striking plate 20 is connected with the circuit board 30 through the flexible conductive wire 401, and the conductive wire 401 does not transmit vibration to the second connector 402 and the first connector 312, so that a phenomenon of poor contact of an electrical connection structure of the circuit board 30 caused by vibration generated by opening and closing of the circuit breaker can be avoided.

In some embodiments of the present application, the first connector 312 may be one of a socket or a plug, and the second connector 402 may be the other of the socket or the plug that is different from the first connector 312.

It will be appreciated that the second end 22 of the striking plate 20 and the first electrical connection 31 of the circuit board 30 may also be electrically connected by other means, such as directly by wires.

In some embodiments of the present application, referring to fig. 4, 9 and 11, fig. 11 shows a schematic structural diagram of the terminal in the embodiments of the present application, where the circuit board 30 is further provided with a second electrical connection portion 32, the housing 10 further has a third accommodating chamber 113, and the second accommodating chamber 112 is located between the first accommodating chamber 111 and the third accommodating chamber 113. A terminal 50 is mounted in the third housing chamber 113, and the terminal 50 is connected to a lead wire 51, and the lead wire 51 is electrically connected to the second electrical connection portion 32. Specifically, the first electrical connection portion 31 and the second electrical connection portion 32 respectively correspond to the positive electrode and the negative electrode of the power supply of the circuit board 30, and the connection terminal 50 can be fixed in an internal power circuit (such as a power line) of the circuit breaker, so that the purpose of connecting the positive electrode and the negative electrode of the circuit board 30 can be achieved through the lead wire 51 of the connection terminal 50 and the electrical connection member 40, so that the circuit board 30 can be conveniently powered.

Further, in some embodiments of the present application, for example, for the circuit board 30 further provided with the second electrical connection portion 32, referring to fig. 1, 12 and 13, fig. 12 shows a schematic structural diagram of the first housing member 101 in the embodiment of the present application, and fig. 13 shows a schematic structural diagram of the second housing member 102 in the embodiment of the present application, where the housing 10 includes the first housing member 101 and the second housing member 102 that are abutted to each other. The through hole 12 comprises a first through hole 121 in the first housing part 101 and a second through hole 122 in the second housing part 102. One end of the electrical connector 40 is electrically connected to the first electrical connection portion 31 through the first through hole 121, and the lead 51 is electrically connected to the second electrical connection portion 32 through the second through hole 122.

In the above embodiment, the first housing member 101 and the second housing member 102 that are abutted against each other can facilitate disassembly and maintenance of the circuit breaker, and the first through hole 121 located on the first housing member 101 and the second through hole 122 located on the second housing member 102 can also facilitate connection of the first electrical connection portion 31 and the second electrical connection portion 32 of the circuit board 30, thereby achieving electrical connection of the circuit board 30.

In some embodiments of the present application, referring to fig. 1, the first housing part 101 and the third housing part 103 may form a chamber for accommodating the positive main circuit structure of the power supply, while the second housing part 102 and the fourth housing part 104 may form a chamber for accommodating the negative main circuit structure of the power supply, the first electrical connection part 31 of the circuit board 30 may be electrically connected to the positive conductive structure of the power supply through the first through hole 121, and the second electrical connection part 32 of the circuit board 30 may be electrically connected to the negative conductive structure of the power supply through the second through hole 122, so as to finally achieve the positive and negative power supply access of the circuit board 30.

It should be noted that the above description of the circuit breaker is intended to clearly illustrate the implementation verification process of the present application, and those skilled in the art may also make equivalent modification designs under the guidance of the present application, for example, disposing the first through hole 121 and the second through hole 122 on the first housing member 101, so that the first through hole 121 and the second through hole 122 are located on one side of the circuit board 30, and the positive and negative power sources are connected on the same side of the circuit board 30.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.

For each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in this application, the entire contents of which are hereby incorporated by reference into this application, except for the application history documents which are inconsistent or conflict with the contents of this application, and for documents which have limited the broadest scope of the claims of this application (currently or hereafter attached to this application). It is noted that the descriptions, definitions, and/or terms used in the subject matter of this application are subject to such descriptions, definitions, and/or terms if they are inconsistent or conflicting with such descriptions, definitions, and/or terms.

The foregoing has described in detail a circuit breaker provided by the embodiments of the present application, and specific examples have been set forth herein to illustrate the principles and embodiments of the present utility model, the above examples being provided only to assist in understanding the method of the present utility model and its core ideas; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. A circuit breaker, comprising:

a housing (10), the housing (10) having a first accommodation chamber (111), a second accommodation chamber (112), and a through hole (12) communicating the first accommodation chamber (111) and the second accommodation chamber (112);

-an arc striking tab (20), the arc striking tab (20) being mounted within the first housing chamber (111), the arc striking tab (20) having a first end (21) and a second end (22) remote from the first end (21);

a circuit board (30), the circuit board (30) being mounted within the second receiving chamber (112), the circuit board (30) having a first electrical connection (31);

wherein an electrical connector (40) is mounted in the through hole (12), one end of the electrical connector (40) is electrically connected with the first end (21), and the other end is electrically connected with the first electrical connection part (31).

2. Circuit breaker according to claim 1, characterized in that the first end (21) extends in a first direction and the second end (22) extends in a second direction;

wherein, the first direction and the second direction form a preset included angle.

3. The circuit breaker of claim 2, wherein the first direction is perpendicular to the second direction.

4. Circuit breaker according to claim 1, characterized in that the second end (22) is provided with a first connection hole (221) opposite the through hole (12);

the first electric connection part (31) is provided with a second connection hole (311) opposite to the through hole (12), one end of the electric connection piece (40) stretches into the first accommodating chamber (111) and is electrically connected with the first connection hole (221), and the other end stretches into the second accommodating chamber (112) and is electrically connected with the second connection hole (311).

5. Circuit breaker according to claim 4, characterized in that the electrical connection (40) comprises a column (41), a first connection column (42) and a second connection column (43) at each end of the column (41);

the first connecting column (42) stretches into the first connecting hole (221) and is electrically connected, and the second connecting column (43) stretches into the second connecting hole (311) and is electrically connected.

6. The circuit breaker according to claim 5, characterized in that the first connection post (42) is welded to the first connection hole (221) and the second connection post (43) is welded to the second connection hole (311).

7. Circuit breaker according to claim 4, characterized in that the through-hole (12), the first connection hole (221) and the second connection hole (311) are coaxially arranged.

8. Circuit breaker according to claim 1, characterized in that the first electrical connection (31) is provided with a first plug connector (312), the electrical connection (40) comprising a wire (401) and a second plug connector (402);

one end of the wire (401) is electrically connected with the second end (22), the other end of the wire is electrically connected with the second plug connector (402), and the second plug connector (402) stretches into the second accommodating cavity (112) and is matched with the first plug connector (312).

9. Circuit breaker according to claim 1, characterized in that the circuit board (30) is further provided with a second electrical connection (32), the housing (10) further having a third housing chamber (113), the second housing chamber (112) being located between the first housing chamber (111) and the third housing chamber (113);

a wiring terminal (50) is installed in the third accommodating chamber (113), the wiring terminal (50) is connected with a lead wire (51), and the lead wire (51) is electrically connected with the second electrical connection part (32).

10. Circuit breaker according to claim 9, characterized in that the housing (10) comprises a first housing part (101) and a second housing part (102) which are in butt joint with each other;

the through hole (12) comprises a first through hole (121) located on the first housing part (101) and a second through hole (122) located on the second housing part (102);

one end of the electric connecting piece (40) passes through the first through hole (121) to be electrically connected with the first electric connecting part (31), and the lead wire (51) passes through the second through hole (122) to be electrically connected with the second electric connecting part (32).

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