Circuit breaker

Abstract

The utility model provides a circuit breaker comprising a first moving contact assembly and a second moving contact assembly which are arranged along a first direction and adjacent to each other, the first moving contact assembly comprises a first rotating shaft configured to rotate around a rotating axis in the first direction, and the second moving contact assembly comprises a second rotating shaft configured to rotate around the rotating axis; a main shaft extending in a first direction to only pass through the first axis of rotation and radially offset with respect to the axis of rotation; and the first insulating connecting piece is arranged between the first rotating shaft and the second rotating shaft and configured to rotate around the rotating axis, the first insulating connecting piece is connected with the first rotating shaft and the second rotating shaft, and the main shaft penetrates through a first offset hole of the first insulating connecting piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical device more particularly, relate to the circuit breaker including insulation connecting piece. BACKGROUND

[0002] The circuit breaker is the electrical device that can be connected, carries and breaks the electric current. In the breaking process of circuit breaker, the inter-pole insulation is especially important, especially under high voltage environment. Usually, in the multi-pole circuit breaker, the main shaft passes through all the moving contact assemblies to realize the synchronous action of moving contact assemblies, and in order to meet the requirement of mechanical strength, the main shaft is usually made of metal. This is easy to cause the multiple poles of circuit breaker to be broken down under high voltage environment, so that the current cannot be fully arc extinguished, thereby bringing great security risks. SUMMARY

[0003] Therefore, in view of the above problems, the utility model provides a circuit breaker, comprising: first moving contact assembly and second moving contact assembly arranged along a first direction and adjacent to each other, the first moving contact assembly comprising a first rotating shaft configured to rotate about a rotating axis in the first direction, and the second moving contact assembly comprising a second rotating shaft configured to rotate about the rotating axis; a main shaft extending along the first direction to pass through only the first rotating shaft and being offset radially with respect to the rotating axis; and a first insulation connecting piece disposed between the first rotating shaft and the second rotating shaft and configured to rotate about the rotating axis, the first insulation connecting piece connecting the first rotating shaft and the second rotating shaft, and the main shaft passing through a first offset hole of the first insulation connecting piece.

[0004] In an embodiment, the first insulation connecting piece further comprises a first offset portion, each of the first rotating shaft and the second rotating shaft comprises a second offset portion, the first offset portion is fixedly connected to the second offset portion, and the first offset portion and the second offset portion are offset radially with respect to the rotating axis.

[0005] In an embodiment, the first offset portion is a hole, the first rotating shaft and the second rotating shaft comprise a cylindrical body, and the second offset portion is a protruding portion protruding from the cylindrical body in the first direction.

[0006] In an embodiment, the circuit breaker further comprises a first pole housing and a second pole housing surrounding the first moving contact assembly and the second moving contact assembly respectively, and the first insulation connecting piece is between the first pole housing and the second pole housing.

[0007] In an embodiment, the circuit breaker further comprises an opening and closing indication rod, the opening and closing indication rod is between the first pole housing and the second pole housing, extends along a second direction perpendicular to the first direction, and moves in the second direction by being pushed by the main shaft to indicate the connection and disconnection of the circuit breaker.

[0008] In an embodiment, the first end of the main shaft passes through the first insulating connector from one side of the first rotating shaft to be inserted into the notch of the opening and closing indication lever, so as to push the opening and closing indication lever.

[0009] In an embodiment, the circuit breaker further comprises a tripping indication lever for indicating a tripping state of the circuit breaker and comprising a first action part for acting with the first micro switch, wherein the opening and closing indication lever comprises a second action part for acting with the second micro switch, the first action part and the second action part are staggered in the first direction, and the tripping indication lever does not overlap the second action part of the opening and closing indication lever in the second direction.

[0010] In an embodiment, each of the first pole shell and the second pole shell comprises a first outer side surface, a second outer side surface and a third outer side surface connecting the first outer side surface and the second outer side surface, the first outer side surface and the second outer side surface face the first direction and are opposite to each other, and the third outer side surface faces the second direction, the first action part and the second action part are located above the third outer side surface of the second pole shell in the second direction.

[0011] In an embodiment, the circuit breaker further comprises a tripping mechanism located above the third outer side surface of the first pole shell in the second direction, wherein the tripping indication lever comprises a surface profile matched with the tripping mechanism to be moved in the second direction by being pushed by the tripping mechanism to indicate the tripping state of the circuit breaker.

[0012] In an embodiment, the circuit breaker further comprises: a third moving contact assembly adjacent to the first moving contact assembly in the first direction and comprising a third rotating shaft configured to rotate around the rotation axis, the first moving contact assembly being between the second moving contact assembly and the third moving contact assembly; and a second insulating connector disposed between the first rotating shaft and the third rotating shaft in the first direction and configured to rotate around the rotation axis, the second insulating connector connecting the first rotating shaft and the third rotating shaft to transmit the rotating force between the first rotating shaft and the third rotating shaft, the main shaft passing through the second offset hole of the second insulating connector.

[0013] In an embodiment, the second insulating connector further comprises a third offset part, each of the first rotating shaft and the third rotating shaft comprises a fourth offset part, the third offset part is fixedly connected to the fourth offset part, and the third offset part and the fourth offset part are offset radially with respect to the rotation axis.

[0014] The circuit breaker according to the utility model can improve the insulation performance between poles, thereby improving safety. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other features and advantages of the exemplary embodiments of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the application. The description and drawings are merely illustrative of the present application, and do not in any way limit the scope of the present application, wherein:

[0016] Figure 1 is a partial perspective view showing a circuit breaker according to an embodiment of the present application;

[0017] Figure 2 is a perspective view showing removal of a pole from the structure shown in Figure 1

[0018] Figure 3 is a partial perspective view showing a circuit breaker according to an embodiment of the present application;

[0019] Figure 4 is a partial cross-sectional view showing a circuit breaker according to an embodiment of the present application;

[0020] Figure 5 is a perspective view showing an insulation connector of a circuit breaker according to an embodiment of the present application;

[0021] Figure 6A and Figure 6B is a partial perspective view showing an open state of a circuit breaker according to an embodiment of the present application;

[0022] Figure 7A and Figure 7B is a partial perspective view showing a closed state of a circuit breaker according to an embodiment of the present application;

[0023] Figure 8A and Figure 8B is a partial perspective view showing a tripped state of a circuit breaker according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely in the following with reference to the drawings of the embodiments of the present disclosure. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0025] ​Compared to the embodiments shown in the drawings, feasible implementations within the protection scope of the present disclosure can have fewer components, have other components not shown in the drawings, have different components, have differently arranged components, or have differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as multiple separate components.

[0026] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", and similar terms used in the specification and claims of the present patent application do not necessarily mean any order, number, or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components can be one or more; similarly, the terms "one", "the", "said", and the like do not necessarily mean a quantity limitation. The terms "include" or "contain" and the like mean that the elements or objects before the term encompass the elements or objects listed after the term and their equivalents, and do not exclude other elements or objects. The terms "provide" or "connect" and the like are not limited to physical or mechanical provision or connection, but can include electrical provision or connection, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to represent the relative positional relationship of the device in use or the positional relationship shown in the drawings, and when the absolute position of the described object changes, the relative positional relationship can also change accordingly.

[0027] In the following, various embodiments of the present disclosure are described with reference to the drawings.

[0028] Figure 1 is a partial perspective view showing a circuit breaker according to an embodiment of the present disclosure. Figure 2 is a perspective view showing a structure in which a pole is removed from Figure 1 is a perspective view showing a structure in which a pole is removed from Figure 3 is a partial perspective view showing a circuit breaker according to an embodiment of the present disclosure. Figure 4 is a partial sectional view showing a circuit breaker according to an embodiment of the present disclosure. Figure 5 is a perspective view showing an insulation connecting member of a circuit breaker according to an embodiment of the present disclosure.

[0029] Referring to Figures 1 to 3 The circuit breaker 1 can include a plurality of poles, each of which can be connected to a phase line or a neutral line and can correspond to a corresponding movable contact assembly 10. According to an embodiment of the present disclosure, the circuit breaker 1 can include a plurality of movable contact assemblies 10, a main shaft 20, and a first insulation connecting member 31.

[0030] According to an embodiment of the present application, the plurality of moving contact assemblies 10 can include a first moving contact assembly 11 and a second moving contact assembly 12 arranged along the first direction D1 and adjacent to each other. Each moving contact assembly 10 can include a rotating shaft configured to rotate about a rotation axis RA in the first direction D1 and a moving contact connected to the rotating shaft, the moving contact rotating with the rotating shaft to contact or disengage a stationary contact (not shown) of the circuit breaker 1, thereby closing or opening a corresponding contact circuit. For example, as shown in Figure 3 the first moving contact assembly 11 can include a first rotating shaft 111 configured to rotate about the rotation axis RA and a moving contact 112 connected to the first rotating shaft 111. The second moving contact assembly 12 can include a second rotating shaft 121 configured to rotate about the rotation axis RA and a second moving contact 122 connected to the second rotating shaft 121.

[0031] According to an embodiment of the present application, the main shaft 20 can extend along the first direction D1 to pass through only one rotating shaft, for example, the first rotating shaft 111. The main shaft 20 can be radially offset with respect to the rotation axis RA, i.e., not coinciding with the rotation axis RA.

[0032] According to an embodiment of the present application, the first insulating connecting piece 31 can be disposed between the first rotating shaft 111 and the second rotating shaft 121 in the first direction D1 and configured to rotate about the rotation axis RA. The first insulating connecting piece 31 can connect the first rotating shaft 111 and the second rotating shaft 121 to transmit a rotating force between the first rotating shaft 111 and the second rotating shaft 121. The main shaft 20 can pass through a first offset hole 311 of the first insulating connecting piece 31.

[0033] The circuit breaker 1 can further include a driving mechanism 80 connected to the main shaft 20 to drive the main shaft 20 to move, for example, the driving mechanism 80 can include a hole for the main shaft 20 to pass through. The driving mechanism 80 can include a handle 81, a linkage mechanism 82 (see Figure 6B and Figure 7B ), etc., and can move by a force manually applied to the handle 81 or by a received electrical signal. The present disclosure is not limited to a specific driving mechanism, and therefore it is not described in detail here. When the driving mechanism 80 moves, the linkage mechanism 82 of the driving mechanism 80 can drive the main shaft 20 to move, thereby causing the first rotating shaft 111 passed through by the main shaft 20 to rotate about the rotation axis RA. By the first insulating connecting piece 31 transmitting a rotating force between the first rotating shaft 111 and the second rotating shaft 121, the second rotating shaft 121 can rotate with the first rotating shaft 111, thereby achieving synchronous movement of the plurality of moving contact assemblies of the circuit breaker.

[0034] In the circuit breaker according to the utility model, the main shaft only passes through one rotating shaft, that is, only connected to one movable contact assembly, and the rotating shafts transmit the rotating force through the insulating connecting pieces, so that the insulation performance between the poles can be greatly improved while ensuring the synchronous movement of the multiple movable contact assemblies of the circuit breaker, and the multiple poles of the circuit breaker are prevented from being broken down due to the main shaft, thereby improving the safety of the circuit breaker.

[0035] The main shaft of the circuit breaker according to the utility model is not limited to being formed of a conductive material (for example, metal), but can also be formed of an insulating material (for example, engineering plastic or the like) having a certain mechanical strength.

[0036] According to an embodiment of the utility model, as shown in Figures 3 to 5 The first insulating connecting piece 31 can further include a first biasing portion 312, and each of the first rotating shaft 111 and the second rotating shaft 121 can include a second biasing portion 123. The first biasing portion 312 of the first insulating connecting piece 31 can be fixedly connected to the second biasing portion 123 of each of the first rotating shaft 111 and the second rotating shaft 121, and the first biasing portion 312 and the second biasing portion 123 can be biased radially with respect to the rotation axis RA, that is, not coinciding with the rotation axis RA.

[0037] The first biasing portion 312 of the first insulating connecting piece 31 and the second biasing portion 123 of the first rotating shaft 111 and the second rotating shaft 121 can have various forms. For example, as shown in Figures 3 to 5 The first biasing portion 312 is a hole, the first rotating shaft 111 and the second rotating shaft 121 include a cylindrical body, and the second biasing portion 123 is a protruding portion protruding from the cylindrical body in the first direction D1. For another example, the first biasing portion 312 of the first insulating connecting piece 31 can be a protruding portion protruding from the body of the first insulating connecting piece 31, and the second biasing portion 123 of the first rotating shaft 111 and the second rotating shaft 121 can be a groove recessed from the body of the corresponding rotating shaft. However, the present disclosure is not limited thereto. The forms of the first biasing portion 312 and the second biasing portion 123 can be variously changed, and the second biasing portion 123 of the first rotating shaft 111 and the second rotating shaft 121 can also have different forms, as long as the first insulating connecting piece 31 can be connected with the first and second rotating shafts 111 and 121 through these biasing portions.

[0038] According to an embodiment of the utility model, the circuit breaker 1 can further include a first pole housing 41 and a second pole housing 42 surrounding the first movable contact assembly 11 and the second movable contact assembly 12 respectively, and the first insulating connecting piece 31 can be located between the first pole housing 41 and the second pole housing 42. The first pole housing 41 can include an opening through which the main shaft 20 can pass to be inserted into the first biasing hole 311 of the first insulating connecting piece 31. As shown in Figure 1 and Figure 2As shown, each of the first pole housing 41 and the second pole housing 42 can include a first outer side surface OS1, a second outer side surface OS2, and a third outer side surface OS3 connecting the first outer side surface OS1 and the second outer side surface OS2, the first outer side surface OS1 and the second outer side surface OS2 facing a first direction D1 and being opposite to each other, and the third outer side surface OS3 facing a second direction D2 perpendicular to the first direction D1.

[0039] According to an embodiment of the present application, as shown in Figure 2 The circuit breaker 1 can further include an opening and closing indication rod 50. The opening and closing indication rod 50 can be arranged between the first pole housing 41 and the second pole housing 42 of the circuit breaker 1, extend along the second direction D2, and move in the second direction D2 by being poked by the main shaft 20 to indicate the closing and opening of the circuit breaker 1. The opening and closing indication rod 50 can include an acting portion 51 for acting with a first micro switch (not shown). The first micro switch can be located above the acting portion 51 of the opening and closing indication rod 50 in the second direction D2.

[0040] According to an embodiment of the present application, as shown in Figure 2 The first end 21 of the main shaft 20 can pass through the first insulation connecting piece 31 from one side of the first rotating shaft 111 to be inserted into the notch 52 of the opening and closing indication rod 50, so as to poke the opening and closing indication rod 50.

[0041] The closing and opening of the circuit breaker 1 will be described in detail below. Figures 6A to 7B The closing and opening of the circuit breaker 1 will be described in detail below. Figure 6A and Figure 6B is a partial perspective view showing the opening state of the circuit breaker according to an embodiment of the present application, Figure 7A and Figure 7B is a partial perspective view showing the closing state of the circuit breaker according to an embodiment of the present application.

[0042] According to an embodiment of the present application, as shown in Figure 6A and Figure 6B In the opening state (i.e. the opening state) of the circuit breaker, the connecting rod mechanism 82 of the driving mechanism 80 can drive the main shaft 20 to move to the first position. In the process of the main shaft 20 moving to the first position, the main shaft 20 pokes the opening and closing indication rod 50, so that the opening and closing indication rod 50 moves upward along the second direction D2. As the opening and closing indication rod 50 moves upward, the acting portion 51 of the opening and closing indication rod 50 presses the contact of the first micro switch above it, so that the output signal of the electric signal circuit in which the first micro switch is located changes. The control system of the circuit breaker or the external monitoring device can determine that the circuit breaker is in the opening state after detecting such a change in the output signal.

[0043] As shown in Figure 7A and Figure 7BAs shown, in the on state (i.e. closed state) of the circuit breaker, the linkage mechanism 82 of the drive mechanism 80 drives the spindle 20 to move to the second position. In the process of the spindle 20 moving to the second position, the spindle 20 actuates the on-off indication lever 50, so that the on-off indication lever 50 moves downward along the second direction D2. As the on-off indication lever 50 moves downward, the acting portion 51 of the on-off indication lever 50 is out of contact with the first micro switch above it, so that the output signal of the electrical signal circuit in which the first micro switch is located changes. The control system of the circuit breaker or the external monitoring device can determine that the circuit breaker is in the on state after detecting such a change in the output signal.

[0044] Referring back to Figures 1 to 5 , according to an embodiment of the present application, the circuit breaker 1 can further include a tripping indication lever 60. The tripping indication lever 60 can indicate the tripping state of the circuit breaker 1 and can include an acting portion 61 that acts with a second micro switch (not shown). The second micro switch can be located above the acting portion 61 of the tripping indication lever 60 in the second direction D2.

[0045] According to an embodiment of the present application, the circuit breaker 1 can further include a tripping mechanism 70 (see Figure 8A and Figure 8B ), which is located above the third outer side surface OS3 of the first pole housing 41 in the second direction D2. The tripping indication lever 60 can include a surface profile that cooperates with the tripping mechanism 70 to move in the second direction D2 by being actuated by the tripping mechanism 70 to indicate the tripping state of the circuit breaker.

[0046] The tripping state of the circuit breaker 1 will be described in detail below with reference to Figures 7A to 8B . Figure 8A and Figure 8B are partial perspective views showing the tripping state of the circuit breaker according to an embodiment of the present application.

[0047] According to an embodiment of the present application, when an overload, short circuit or other fault occurs in the circuit, the tripping mechanism 70 can move from Figure 7A and Figure 7B shown first position to Figure 8A and Figure 8B shown second position. In the process of the tripping mechanism 70 moving from the first position to the second position, the tripping indication lever 60 can move downward along the second direction D2 as the tripping mechanism 70 moves due to the surface profile that cooperates with the tripping mechanism 70. As the tripping indication lever 60 moves downward, the acting portion 61 of the tripping indication lever 60 is out of contact with the second micro switch above it, so that the output signal of the electrical signal circuit in which the second micro switch is located changes. The control system of the circuit breaker or the external monitoring device can determine that the circuit breaker is in the tripping state after detecting such a change in the output signal.

[0048] Referring back Figure 1 and Figure 2 According to an embodiment of the present application, the acting portion 51 of the opening and closing indicating lever 50 and the acting portion 61 of the tripping indicating lever 60 can be staggered in the first direction D1, and the tripping indicating lever 60 can not overlap the acting portion 51 of the opening and closing indicating lever 50 in the second direction D2. Thus, the tripping indicating lever 60 does not interfere with the arrangement of the first micro switch located above the acting portion 51 of the opening and closing indicating lever 50.

[0049] In an embodiment, the tripping indicating lever 60 can extend from a position above the third outer side surface OS3 of the first pole housing 41 in the first direction D1 toward the second pole housing 42, such that the acting portion 51 of the opening and closing indicating lever 50 and the acting portion 61 of the tripping indicating lever 60 are located on the same side of the first pole housing 41. For example, the acting portions 51 and 61 can be located above the third outer side surface OS3 of the second pole housing 42 in the second direction D2. For another example, the tripping indicating lever 60 can extend further in the first direction D1, such that the distance from the acting portion 61 to the first pole housing 41 can be greater than the distance from the first outer side surface OS1 of the second pole housing 42 to the first pole housing 41.

[0050] In another embodiment, the tripping indicating lever 60 can extend from a position above the third outer side surface OS3 of the first pole housing 41 in the first direction D1 away from the second pole housing 42, such that the acting portion 51 of the opening and closing indicating lever 50 and the acting portion 61 of the tripping indicating lever 60 are located on opposite sides of the first pole housing 41, respectively.

[0051] In the circuit breaker according to the present application, compared with the circuit breaker in which the main shaft passes through all the movable contact assemblies, with the arrangement of the main shaft changed, only the position of the opening and closing indicating lever 50 can be changed without changing the structure of the opening and closing indicating lever 50, and only the position of the acting portion 61 of the tripping indicating lever 60 can be changed without changing the position and structure of the portion of the tripping indicating lever 60 that acts with the tripping mechanism 70 (e.g., the surface profile that cooperates with the tripping mechanism 70), thus the structural change can be reduced and the cost can be lowered.

[0052] Although Figures 1 to 8B Only two poles of the circuit breaker 1 are shown, but the present disclosure is not limited thereto. The circuit breaker 1 according to the present application can also include three poles.

[0053] For example, the circuit breaker 1 according to the utility model can further include a third movable contact assembly and a second insulation connecting piece. The third movable contact assembly can be adjacent to the first movable contact assembly 11 in the first direction D1 and can include a third rotating shaft configured to rotate about the rotating axis RA. The first movable contact assembly 11 can be between the second movable contact assembly 12 and the third movable contact assembly. The second insulation connecting piece can be disposed between the first rotating shaft 111 and the third rotating shaft in the first direction D1 and can be configured to rotate about the rotating axis RA. The second insulation connecting piece can connect the first rotating shaft 111 and the third rotating shaft to transmit a rotating force between the first rotating shaft 111 and the third rotating shaft. The main shaft 20 can pass through a second biasing hole of the second insulation connecting piece. The third movable contact assembly can have substantially the same structure as the first and second movable contact assemblies 11 and 12, and the second insulation connecting piece can have substantially the same structure as the first insulation connecting piece 31, and therefore the specific illustration of the third movable contact assembly and the second insulation connecting piece is omitted here.

[0054] According to an embodiment of the utility model, the second insulation connecting piece can further include a third biasing portion, and each of the first rotating shaft 111 and the third rotating shaft can include a fourth biasing portion. The third biasing portion can be fixedly connected to the fourth biasing portion, and the third biasing portion and the fourth biasing portion can be biased radially relative to the rotating axis RA, i.e., not coinciding with the rotating axis RA. Similar to the first biasing portion of the first insulation connecting piece 31 and the second biasing portions of the first and second rotating shafts 111 and 112, the third biasing portion and the fourth biasing portion can have various forms, such as the form of a hole and a protruding portion. For the sake of brevity, the specific description of the third biasing portion and the fourth biasing portion is omitted here.

[0055] The circuit breaker according to the utility model can improve the insulation performance between poles and reduce the structural changes, thereby improving safety and reducing costs.

[0056] Although the utility model has been described in the description and illustrated in the drawings on the basis of referring to various embodiments, those skilled in the art can understand that the above-mentioned embodiments are only preferred implementation manners, and some technical features in the embodiments can not be essential to solve the specific technical problems, so that these technical features can be omitted without affecting the solution of the technical problems or the formation of the technical scheme; moreover, the features, elements and / or functions of one embodiment can be appropriately combined, combined or matched with the features, elements and / or functions of other one or more embodiments, unless the combination, combination or matching is obviously not implementable.

Claims

1. A circuit breaker characterized by, Comprising: a first moving contact assembly and a second moving contact assembly arranged along a first direction and adjacent to each other, the first moving contact assembly comprising a first rotating shaft configured to rotate about a rotation axis in the first direction, the second moving contact assembly comprising a second rotating shaft configured to rotate about the rotation axis; a main shaft extending along the first direction to pass through only the first rotating shaft and being biased radially with respect to the rotation axis; and a first insulation connecting piece disposed between the first rotating shaft and the second rotating shaft and configured to rotate about the rotation axis, the first insulation connecting piece connecting the first rotating shaft and the second rotating shaft, the main shaft passing through a first biasing hole of the first insulation connecting piece.

2. The circuit breaker of claim 1, wherein, The first insulation connecting piece further comprises a first biasing portion, each of the first rotating shaft and the second rotating shaft comprises a second biasing portion, The first biasing portion is fixedly connected to the second biasing portion, and the first biasing portion and the second biasing portion are biased radially with respect to the rotation axis.

3. The circuit breaker of claim 2, wherein, The first biasing portion is a hole, The first rotating shaft and the second rotating shaft comprise a cylindrical body, and the second biasing portion is a protruding portion protruding from the cylindrical body in the first direction.

4. The circuit breaker of claim 1, wherein, Further comprising: a first pole housing and a second pole housing surrounding the first moving contact assembly and the second moving contact assembly, respectively, the first insulation connecting piece being between the first pole housing and the second pole housing.

5. The circuit breaker of claim 4, wherein, Further comprising: a switching indication lever between the first pole housing and the second pole housing, extending along a second direction perpendicular to the first direction, and moving in the second direction by being actuated by the main shaft to indicate the closing and opening of the circuit breaker.

6. The circuit breaker of claim 5, wherein, The first end of the main shaft passes through the first insulation connecting piece from one side of the first rotating shaft to be inserted into a notch of the switching indication lever to actuate the switching indication lever.

7. The circuit breaker of claim 5, wherein, Further comprising: a tripping indication lever for indicating the tripping state of the circuit breaker and comprising a first acting portion for acting with a first micro switch, wherein The switching indication lever comprises a second acting portion for acting with a second micro switch, The first acting portion and the second acting portion are staggered in the first direction, and the tripping indication lever does not overlap the second acting portion of the switching indication lever in the second direction.

8. The circuit breaker of claim 7, wherein, Each of the first pole housing and the second pole housing comprises a first outer side surface, a second outer side surface, and a third outer side surface connecting the first outer side surface and the second outer side surface, the first outer side surface and the second outer side surface facing the first direction and being opposite to each other, the third outer side surface facing the second direction, The first acting portion and the second acting portion are located above the third outer side surface of the second pole housing in the second direction.

9. The circuit breaker of claim 8, wherein, Further comprising: a tripping mechanism located above the third outer side surface of the first pole housing in the second direction, wherein The tripping indication lever comprises a surface profile cooperating with the tripping mechanism to move in the second direction by being actuated by the tripping mechanism to indicate the tripping state of the circuit breaker.

10. The circuit breaker of claim 1, wherein, Further comprising: a third moving contact assembly adjacent to the first moving contact assembly in the first direction and comprising a third rotating shaft configured to rotate about the rotation axis, the first moving contact assembly being between the second moving contact assembly and the third moving contact assembly; and A second insulating connecting member is disposed between the first rotating shaft and the third rotating shaft in the first direction and is configured to rotate about the rotation axis, the second insulating connecting member connecting the first rotating shaft and the third rotating shaft to transmit a rotational force between the first rotating shaft and the third rotating shaft, the main shaft passing through a second offset hole of the second insulating connecting member.

11. The circuit breaker of claim 10, wherein, The second insulating connecting member further includes a third offset portion, each of the first rotating shaft and the third rotating shaft including a fourth offset portion, The third offset portion is fixedly connected to the fourth offset portion, and the third offset portion and the fourth offset portion are offset in a radial direction with respect to the rotation axis.

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