Circuit breaker

Abstract

A circuit breaker comprises an electromagnetic system and a contact module, the contact module comprises a contact support, a moving contact bridge and two static contacts, the moving contact bridge is arranged on the contact support, and the electromagnetic system is used for driving the contact support to drive the moving contact bridge to move linearly, so that the two ends of the moving contact bridge are in contact with and separated from the two static contacts at the same time. The arc-isolating device comprises at least one movable arc-isolating piece, when the contact support drives the movable contact bridge to be separated from the two static contacts, the arc-isolating piece moves to the position between the movable contact bridge and the two static contacts, and when the contact support drives the movable contact bridge to be in contact with the two static contacts, the arc-isolating piece moves away from the position between the movable contact bridge and the two static contacts, and the arc-isolating piece moves away from the position between the movable contact bridge and the two static contacts. When a brake is opened, the movable arc-isolating piece moves to a position between the movable contact bridge and the static contact, the arc-isolating piece cuts off an electric arc between the movable contact bridge and the static contact, and an insulating and isolating effect is achieved between the movable contact bridge and the static contact, so that even if zero-crossing extinguishing is not performed, the arc extinguishing performance can be effectively improved, the movable and static contacts are protected, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art

[0002] With the continuous development of the power of new energy vehicles, higher requirements are placed on the arc extinguishing performance of existing automotive circuit breakers. Since automotive circuit breakers are used in DC scenarios and the DC arc does not extinguish at zero crossing, it is difficult to extinguish the arc when the circuit breaker is opened, the arc extinguishing performance is poor, and it is also easy to burn the moving and static contacts. Summary of the invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a contact module.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A circuit breaker includes an electromagnetic system and a contact module. The contact module includes a contact support, a moving contact bridge and two stationary contacts. The moving contact bridge is arranged on the contact support. The electromagnetic system is used to drive the contact support to drive the moving contact bridge to move linearly, so that the two ends of the moving contact bridge are in contact with and separated from the two stationary contacts at the same time. The circuit breaker includes at least one movable arc-isolating member. When the contact support drives the moving contact bridge to separate from the two stationary contacts, the arc-isolating member moves to between the moving contact bridge and the two stationary contacts. When the contact support drives the moving contact bridge to contact the two stationary contacts, the arc-isolating member moves away from between the moving contact bridge and the two stationary contacts.

[0006] Preferably, it further comprises an elastic member, and when the contact support drives the moving contact bridge to separate from the two stationary contacts, the elastic member drives the arc isolation member to move between the moving contact bridge and the two stationary contacts.

[0007] Preferably, when the contact support drives the moving contact bridge to separate from the two stationary contacts, the contact support simultaneously drives the arc-isolating piece to move between the moving contact bridge and the two stationary contacts; and / or, when the contact support drives the moving contact bridge to contact the two stationary contacts, the contact support simultaneously drives the arc-isolating piece to move away from between the moving contact bridge and the two stationary contacts.

[0008] Preferably, the two contact modules, the electromagnetic system is arranged between the two contact modules, the electromagnetic system includes a moving iron core and a coil and a static iron core for driving the moving iron core to move, the moving iron core is provided with a linkage rod, the two ends of the linkage rod are connected to the contact supports of the two contact modules, and are used to drive the contact supports in the two contact modules to move.

[0009] Preferably, at least one arc-isolating member is provided between the electromagnetic system and the two contact modules, and when the contact support drives the moving contact bridge to separate from the two stationary contacts, the linkage rod drives the arc-isolating member to move between the moving contact bridge and the two stationary contacts; and / or when the contact support drives the moving contact bridge to contact the two stationary contacts, the linkage rod drives the arc-isolating member to move away from the moving contact bridge and the two stationary contacts.

[0010] Preferably, the arc-isolating member comprises at least one arc-isolating portion and at least one driven portion, and the driven portion is subjected to force to move the arc-isolating portion of the arc-isolating member to between the moving contact bridge and the two stationary contacts, and / or away from between the moving contact bridge and the two stationary contacts.

[0011] Preferably, the number of the arc-isolating member is one, and the arc-isolating member includes two arc-isolating portions, which are respectively inserted between the moving contact bridge and the static contacts at both ends; or, the number of the arc-isolating member is two, and the two arc-isolating members each include an arc-isolating portion, which are respectively inserted between the moving contact bridge and the static contacts at both ends.

[0012] Preferably, the arc isolation member is provided with two coaxially arranged rotating parts, which protrude outward respectively. The driven part is subjected to force to cause the arc isolation member to rotate around the axes of the two rotating parts, and drive the arc isolation part to rotate into and / or rotate out of between the moving contact bridge and the static contact.

[0013] Preferably, it also includes a second arc-isolating member, the number of which is the same as that of the arc-isolating members, the second arc-isolating members and the arc-isolating members are relatively arranged on both sides of the moving contact bridge along the width direction of the moving contact bridge, the structure of the second arc-isolating member is the same as that of the arc-isolating member, when the contact support drives the moving contact bridge to separate from the two static contacts, the arc-isolating portion of the second arc-isolating member and the arc-isolating portion of the arc-isolating member move toward each other and move between the moving contact bridge and the two static contacts, when the contact support drives the moving contact bridge to contact the two static contacts, the arc-isolating portion of the second arc-isolating member and the arc-isolating portion of the arc-isolating member move in a direction away from each other and move away from between the moving contact bridge and the two static contacts.

[0014] Preferably, an active part for driving the actuated part to move is provided on the contact support, and the arc-isolating member includes two actuated parts, which are respectively a closing actuated part and an opening actuated part. The closing actuated part and the opening actuated part are respectively provided with a closing contact surface and an opening contact surface on the side close to the active part, and the closing contact surface and the opening contact surface are arranged at an oblique angle. The active part is arranged between the closing contact surface and the opening contact surface, and is used for pushing the closing contact surface and the opening contact surface respectively, so that the closing actuated part and the opening actuated part rotate to the side away from the closing contact surface and the opening contact surface respectively, and the arc-isolating member is arranged on the side of the rotation center of the arc-isolating member close to the closing actuated part.

[0015] Preferably, the closing actuated part is arranged on a side of the active part close to the static contact, and when the contact support drives the moving contact bridge to contact the two static contacts, it drives the active part to push the closing actuated part, so that the arc-isolating part leaves the moving contact bridge and the two static contacts; the opening actuated part is arranged on a side of the active part away from the static contact, and when the contact support drives the moving contact bridge to separate from the two static contacts, it drives the active part to push the opening actuated part, so that the arc-isolating part moves to between the moving contact bridge and the two static contacts.

[0016] Preferably, the arc-isolating member comprises two connected activated plates, the two activated plates being respectively a first activated plate and a second activated plate, the first activated plate being arranged on a side of the second activated plate close to the static contact, the arc-isolating portion being connected to the first activated plate, the first activated plate and the second activated plate being respectively provided with activated portions protruding to the same side, and the activated portion of the first activated plate and the activated portion on the second activated plate being arranged at intervals, respectively serving as a closing activated portion and an opening activated portion.

[0017] Preferably, the arc-isolating member includes two connected activated plates, which are respectively a first activated plate and a second activated plate, the first activated plate being arranged on a side of the second activated plate close to the static contact, the arc-isolating portion is connected to the first activated plate, and the first activated plate has rotating portions at opposite ends thereof, the active portion on the contact support extends to the side surfaces of the first activated plate and the second activated plate, the first activated plate and the second activated plate serve as a closing activated portion and an opening activated portion respectively, and the active portion directly pushes the first activated plate and the second activated plate to drive the arc-isolating member to rotate.

[0018] Preferably, the first driven plate, the second driven plate and the arc-isolating portion are all plate-shaped, the first driven plate is connected between the second driven plate and the arc-isolating portion, and the first driven plate is arranged at an oblique angle to the second driven plate and the arc-isolating portion respectively.

[0019] Preferably, it also includes a second arc-isolating member, the number of which is the same as that of the arc-isolating members, the second arc-isolating members and the arc-isolating members are relatively arranged on both sides of the moving contact bridge along the width direction of the moving contact bridge, the structure of the second arc-isolating member is the same as that of the arc-isolating member, and the two sides of the contact support are respectively provided with an active part and a second active part for driving the arc-isolating member and the second arc-isolating member, when the contact support drives the moving contact bridge to separate from the two static contacts, the second active part and the active part respectively drive the driven part of the second arc-isolating member and the driven part of the arc-isolating member to move, so that the arc-isolating part of the second arc-isolating member and the arc-isolating part of the arc-isolating member rotate toward each other and move between the moving contact bridge and the static contact.

[0020] Preferably, when the arc isolation portion of the second arc isolation member and the arc isolation portion of the arc isolation member are respectively located between the moving contact bridge and the stationary contact, the arc isolation portion of the second arc isolation member and the arc isolation portion of the arc isolation member are stacked.

[0021] Preferably, the arc-isolating portion of the second arc-isolating member and the arc-isolating portion of the arc-isolating member are respectively provided with mating surfaces. When the arc-isolating portion of the second arc-isolating member and the arc-isolating portion of the arc-isolating member are respectively located between the moving contact bridge and the static contact, the mating surface of the arc-isolating portion of the second arc-isolating member contacts the mating surface of the arc-isolating portion of the arc-isolating member, so that the arc-isolating portion of the second arc-isolating member and the arc-isolating portion of the arc-isolating member are located in the same plane.

[0022] Preferably, the contact module further comprises a cover shell, the contact support, the moving contact bridge, the two stationary contacts and the arc-isolating member are all arranged in the cover shell, and the arc-isolating member is rotatably mounted on the cover shell.

[0023] Preferably, the contact module also includes two arc extinguishing chambers relatively arranged at both ends of the moving contact bridge along the length direction of the moving contact bridge, the two arc extinguishing chambers are located at opposite ends of the cover shell, the contact support and the static contact are arranged between the two arc extinguishing chambers, the contact support is arranged on the side of the moving contact bridge away from the static contact along the thickness direction of the moving contact bridge, and the contact support is used to drive the moving contact bridge to move along the thickness direction of the moving contact bridge, the two static contacts are respectively arranged opposite to the two ends of the moving contact bridge, and conductive plates connected to the two static contacts are respectively provided on the sides of the two static contacts away from the moving contact bridge.

[0024] Preferably, the arc isolation member is rotatably arranged or linearly movable arranged.

[0025] The circuit breaker of the utility model moves the movable arc-isolating member between the moving contact bridge and the stationary contact when opening the circuit breaker, cuts off the arc between the moving contact bridge and the stationary contact through the arc-isolating member, and plays the role of insulating isolation between the moving contact bridge and the stationary contact. Even if there is no zero-crossing extinguishing, the arc extinguishing performance can be effectively improved, the moving and stationary heads can be protected, and the product life can be increased.

[0026] In addition, the rotatably arranged arc-isolating member has the characteristic of occupying a small space, and does not require too much movement space in the lateral direction, thereby avoiding increasing the volume of the contact module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an exploded view of the vehicle circuit breaker of the utility model;

[0028] Figure 2 This utility model Figure 1 A front view of

[0029] Figure 3 It is a structural schematic diagram of the contact module of the utility model;

[0030] Figure 4 It is an exploded view of the contact module of the utility model;

[0031] Figure 5 It is a cross-sectional view of the contact module of the utility model;

[0032] Figure 6 is a schematic structural diagram of the arc isolation member in the first embodiment;

[0033] Figure 7 is a schematic structural diagram of the arc isolation member in the second embodiment;

[0034] In the figure, 1. electromagnetic system; 2. contact module; 20. arc extinguishing chamber; 10. linkage rod; 3. contact support; 30. active part; 4. moving contact bridge; 5. static contact; 6. arc-isolating member; 61. arc-isolating part; 610. docking surface; 62. actuated part; 63. rotating part; 621. closing actuated part; 622. opening actuated part; 623. first actuated plate; 624. second actuated plate; 7. bracket; 71. slide groove; 64. driving surface; 8. elastic member; 65. sliding part; 72. guide rail; 66. balancing block; 73. guide groove; 67. guide block; 74. buffer block. DETAILED DESCRIPTION

[0035] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the contact module of the present utility model. The contact module of the present utility model is not limited to the description of the following embodiments.

[0036] like Figure 1-2 As shown, this embodiment provides a circuit breaker, including an electromagnetic system 1 and a contact module 2, the contact module 2 includes a contact support 3, a moving contact bridge 4 and two stationary contacts 5, the moving contact bridge 4 is arranged on the contact support 3, and the electromagnetic system 1 is used to drive the contact support 3 to drive the moving contact bridge 4 to move linearly, so that the two ends of the moving contact bridge 4 are in contact with and separated from the two stationary contacts 5 at the same time. This embodiment is a circuit breaker for a vehicle, including a housing, an electromagnetic system 1 and two contact modules 2 arranged in the housing, wherein the electromagnetic system 1 is arranged between the two contact modules 2, and the electromagnetic system 1 includes a moving iron core and a coil and a static iron core for driving the moving iron core to move, wherein the moving iron core is provided with a linkage rod 10 respectively inserted into the two contact modules 2, and used to drive the two contact modules 2 to connect and disconnect, wherein the contact module 2 includes a cover shell, and a contact support 3, a moving contact bridge 4 and two static contacts 5 respectively arranged in the cover shell, wherein the contact support 3 is connected to the linkage rod 10, and the linkage rod 10 is used to drive the contact support 3 to move, and the contact support 3 is used to drive the moving contact bridge 4 to move linearly, so that the two ends of the moving contact bridge 4 are in contact with and separated from the two static contacts 5 at the same time. In addition, as a modified embodiment, the contact module 2 may not be provided with a cover shell.

[0037] The utility model also provides another embodiment of a circuit breaker for a vehicle, which is not shown in the figure. The circuit breaker includes an electromagnetic module and the contact module 2. The contact module 2 and the electromagnetic module include a cover and an electromagnetic module housing, respectively. An electromagnetic system 1 is provided in the electromagnetic module housing. The electromagnetic system 1 includes a coil, a moving iron core and a static iron core. The electromagnetic system 1 is provided with a linkage structure connected to the moving iron core. The cover and the electromagnetic module housing are respectively provided with avoidance holes for avoiding the linkage structure. The cover and the electromagnetic module housing are arranged side by side. The linkage structure passes through the avoidance hole and is inserted into the cover to connect with the moving contact bridge 4, which is used to drive the moving contact bridge 4 to move linearly. In the DC switch of this embodiment, the electromagnetic module and the contact module 2 are modularly arranged in the cover and the electromagnetic module housing, respectively, and the stability of the contact module 2 is improved, thereby improving the stability of the entire DC switch.

[0038] like Figure 3-5 As shown, this embodiment further provides a contact module 2, including two arc extinguishing chambers 20 relatively arranged at both ends of the moving contact bridge 4 along the length direction of the moving contact bridge 4, the two arc extinguishing chambers 20 are located at opposite ends of the cover, the contact support 3 and the static contact 5 are arranged between the two arc extinguishing chambers 20, the contact support 3 is arranged on the side of the moving contact bridge 4 away from the static contact 5 along the thickness direction of the moving contact bridge 4, and the contact support 3 is used to drive the moving contact bridge 4 to move along the thickness direction of the moving contact bridge 4, the two static contacts 5 are respectively arranged opposite to the two ends of the moving contact bridge 4, and conductive plates connected to the two static contacts 5 are respectively provided on the sides of the two static contacts 5 away from the moving contact bridge 4. The length, thickness and width direction of the moving contact bridge 4 can be referred to. Figure 4 .

[0039] like Figure 6-7 As shown, the circuit breaker of this embodiment further includes at least one movable arc-isolating member 6, and the arc-isolating member 6 is arranged to rotate or linearly move. When the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the arc-isolating member 6 moves to between the moving contact bridge 4 and the two stationary contacts 5, and when the contact support 3 drives the moving contact bridge 4 to contact the two stationary contacts 5, the arc-isolating member 6 moves away from between the moving contact bridge 4 and the two stationary contacts 5. The circuit breaker of this embodiment moves between the moving contact bridge 4 and the stationary contacts 5 through the movable arc-isolating member 6 when opening the circuit breaker, cuts off the arc between the moving contact bridge 4 and the stationary contacts 5 through the arc-isolating member 6, and plays the role of insulating isolation between the moving contact bridge 4 and the stationary contacts 5. Even if there is no zero-crossing extinguishing, the arc extinguishing performance can be effectively improved, and the moving and stationary contacts are protected, thereby increasing the product life.

[0040] Optionally, when the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the contact support 3 simultaneously drives the arc-isolating member 6 to move between the moving contact bridge 4 and the two stationary contacts 5; and / or, when the contact support 3 drives the moving contact bridge 4 to contact the two stationary contacts 5, the contact support 3 simultaneously drives the arc-isolating member 6 to move away from the moving contact bridge 4 and the two stationary contacts 5.

[0041] Optionally, the circuit breaker also includes an elastic member 8, and when the contact support 3 drives the moving contact bridge 4 to separate from the two static contacts 5, the elastic member 8 drives the arc-isolating member 6 to move between the moving contact bridge 4 and the two static contacts 5, and when the contact support 3 drives the moving contact bridge 4 to contact the two static contacts 5, the arc-isolating member 6 is driven by the contact support 3 to move away from between the moving contact bridge 4 and the two static contacts 5 and the elastic member 8 stores energy; or, when the contact support 3 drives the moving contact bridge 4 to separate from the two static contacts 5, the contact support 3 drives the arc-isolating member 6 to move between the moving contact bridge 4 and the two static contacts 5 and the elastic member 8 stores energy, and when the contact support 3 drives the moving contact bridge 4 to contact the two static contacts 5, the elastic member 8 drives the arc-isolating member 6 to move away from between the moving contact bridge 4 and the two static contacts 5.

[0042] Optionally, the arc-isolating member 6 can also be driven by the linkage rod 10, or the linkage rod 10 cooperates with the elastic member 8 to drive the arc-isolating member 6. A preferred layout is that at least one arc-isolating member 6 is provided between the electromagnetic system 1 and the two contact modules 2, and when the contact support 3 drives the moving contact bridge 4 to separate from the two static contacts 5, the linkage rod 10 drives the arc-isolating member 6 to move between the moving contact bridge 4 and the static contacts 5; and / or when the contact support 3 drives the moving contact bridge 4 to contact the two static contacts 5, the linkage rod 10 drives the arc-isolating member 6 to move away from the moving contact bridge 4 and the static contacts 5. In addition, an elastic member 8 can also be provided, and the linkage rod 10 drives the arc-isolating member 6 to move between the moving contact bridge 4 and the static contacts 5 or away from the moving contact bridge 4 and the static contacts 5, and the elastic member 8 drives the arc-isolating member 6 to move away from the moving contact bridge 4 and the static contacts 5, or to move between the moving contact bridge 4 and the static contacts 5. The layout structure of this embodiment is reasonable, and there is no need to change the structure layout of the existing vehicle circuit breaker. It only needs to provide corresponding driving protrusions in the radial direction of the linkage rod 10 for transmission.

[0043] like Figure 6-7 As shown, the contact module 2 includes at least one movable arc-isolating member 6, and the arc-isolating member 6 includes at least one arc-isolating portion 61 and at least one driven portion 62. The contact support 3 or the linkage rod 10 is provided with an active portion 30 for controlling the movement of the driven portion 62. When the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the driven portion 62 is driven to move by the active portion 30, and the driven portion 62 is forced to drive the arc-isolating portion 61 to move between the moving contact bridge 4 and the two stationary contacts 5; and / or when the contact support 3 drives the moving contact bridge 4 to contact the two stationary contacts 5, the driven portion 62 is forced to drive the arc-isolating portion 61 of the arc-isolating member 6 to move away from between the moving contact bridge 4 and the stationary contacts 5; for example, the arc-isolating member 6 is moved away by driving the contact support 3, or the arc-isolating member 6 is automatically moved away by driving the elastic member 8.

[0044] Optionally, the number of the arc-isolating member 6 can be one, in which case the arc-isolating member 6 includes two arc-isolating portions 61 and one actuated portion 62, and the two arc-isolating portions 61 are used to be respectively inserted between the moving contact bridge 4 and the stationary contacts 5 at both ends. The advantage is that the number of parts is small, and processing and assembly are convenient.

[0045] Optionally, the number of the arc-isolating members 6 can be two, in which case the two arc-isolating members 6 respectively include an arc-isolating portion 61 and a passive portion 62, the contact support 3 is provided with one or two active portions 30, and the two arc-isolating members 6 are controlled to move respectively through the active portion 30, so that the arc-isolating portions 61 on the two arc-isolating members 6 are respectively inserted between the moving contact bridge 4 and the static contacts 5 at both ends. The advantage is that the two arc-isolating members 6 can be staggered and respectively assembled on both sides of the moving contact bridge 4 in the width direction, thereby playing a role in balancing the weight.

[0046] Furthermore, it also includes second arc-isolating members, the number of which is the same as that of the arc-isolating members 6, the second arc-isolating members and the arc-isolating members 6 are relatively arranged on both sides of the moving contact bridge 4 along the width direction of the moving contact bridge 4, the structure of the second arc-isolating members is the same as that of the arc-isolating members 6, when the contact support 3 drives the moving contact bridge 4 to separate from the two static contacts 5, the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 move toward each other and move to between the moving contact bridge 4 and the two static contacts 5, when the contact support 3 drives the moving contact bridge 4 to contact with the two static contacts 5, the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 move in a direction away from each other and move away from between the moving contact bridge 4 and the two static contacts 5. By respectively arranging an arc-isolating member 6 and a second arc-isolating member in the width direction of the moving contact bridge 4, the moving contact bridge 4 can be shielded from both sides and a more closed space can be formed, thereby preventing the arc from moving on the edge of the arc-isolating member 6 when only one arc-isolating member 6 is arranged, thereby improving the arc-isolating effect.

[0047] Embodiment 1

[0048] like Figure 6 As shown, the arc-isolating member 6 of this embodiment is rotatably arranged, and the arc-isolating member 6 is provided with two coaxially arranged rotating parts 63, the two rotating parts 63 protrude outward respectively, and are respectively rotatably connected to the cover of the contact module 2, and are installed in the cover. The contact support 3 pushes the driven part 62 of the arc-isolating member 6 through the active part 30, so that the arc-isolating member 6 rotates around the axis of the two rotating parts 63, and drives the arc-isolating part 61 to rotate into and out of the moving contact bridge 4 and a stationary contact 5. The rotatably arranged arc-isolating member 6 of this embodiment has the characteristics of occupying a small space, does not need to leave too much movement space in the lateral direction, and can avoid increasing the volume of the contact module 2.

[0049] An improvement of the present embodiment is that the arc isolation member 6 includes two actuated parts 62, the two actuated parts 62 are respectively a closing actuated part 621 and an opening actuated part 622, the closing actuated part 621 and the opening actuated part 622 are respectively provided with a closing contact surface and an opening contact surface on the side close to the active part 30, and the closing contact surface and the opening contact surface are arranged at an oblique angle.

[0050] The active part 30 is used to push the closing contact surface and the opening contact surface respectively, so that the closing actuated part 621 and the opening actuated part 622 rotate to the side away from the closing contact surface and the opening contact surface respectively. The arc isolation part 61 is arranged on the side of the arc isolation member 6 rotation center close to the closing actuated part 621, and the closing actuated part 621 is arranged on the side of the active part 30 close to the static contact 5. When the contact support 3 drives the moving contact bridge 4 to contact the two static contacts 5, it drives the active part 30 to move upward and push the closing contact surface of the closing actuated part 621, so that the arc isolation member 6 rotates counterclockwise, and the closing actuated part 621 drives the arc isolation part 61 away from the moving contact bridge 4 and the static contact 5 to avoid affecting the contact between the moving contact bridge 4 and the static contact 5;

[0051] The opening switch actuated part 622 is arranged on the side of the active part 30 away from the static contact 5. When the contact support 3 drives the moving contact bridge 4 to separate from the two static contacts 5, it drives the active part 30 to move downward and pushes the opening switch contact surface of the opening switch actuated part 622, so that the arc isolation member 6 rotates clockwise. The opening switch actuated part 622 drives the arc isolation part 61 to move between the moving contact bridge 4 and the static contact 5, and cuts the arc between the moving contact bridge 4 and the static contact 5 through the arc isolation part 61, and plays an isolation role between the moving contact bridge 4 and the static contact 5.

[0052] Specifically, the arc-isolating member 6 includes two connected actuated plates, the two actuated plates are respectively a first actuated plate 623 and a second actuated plate, the first actuated plate 623 is arranged on a side of the second actuated plate 624 close to the stationary contact 5, the arc-isolating portion 61 is connected to the first actuated plate 623, the side of the arc-isolating member 6 away from the first actuated plate 623 is provided with a docking surface 610, the first actuated plate 623 and the second actuated plate 624 are respectively provided with an actuated portion 62 protruding to the same side, the actuated portion 62 of the first actuated plate 623 and the actuated portion 62 of the second actuated plate 624 are respectively The closing actuated part 621 and the opening actuated part 622, the actuated part 62 of the first actuated plate 623 and the actuated part 62 on the second actuated plate 624 are arranged at intervals, so that the active part 30 can move between the actuated part 62 of the first actuated plate 623 and the actuated part 62 on the second actuated plate 624, and the opposite ends of the first actuated plate 623 are respectively provided with rotating parts 63 rotatably connected to the cover shell, one of the rotating parts 63 is located between the actuated part 62 of the first actuated plate 623 and the actuated part 62 on the second actuated plate 624, and the size of the actuated part 62 is smaller than the actuated plate to prevent structural interference.

[0053] Of course, the rotating part 63 can also be set on the second driven plate 624, or set at the connection between the first driven plate 623 and the second driven plate 624, and the cover shell can be directly processed with a connecting hole for inserting the rotating part 63, or a connecting platform can be first processed on the cover shell, and then a connecting hole for inserting the rotating part 63 can be processed on the connecting platform, all of which fall within the protection scope of the present utility model.

[0054] Alternatively, the first driven plate 623 and the second driven plate 624 are not provided with a raised driven portion 62, but the active portion 30 on the contact support 3 extends to the sides of the first driven plate 623 and the second driven plate 624, and the first driven plate 623 and the second driven plate 624 respectively serve as the driven portion 62, so that the active portion 30 directly pushes the first driven plate 623 and the second driven plate 624 to drive the arc isolation member 6 to rotate, which all belong to the protection scope of the present utility model.

[0055] Further, the first driven plate 623, the second driven plate 624 and the arc-isolating portion 61 are all plate-shaped, the first driven plate 623 is connected between the second driven plate 624 and the arc-isolating portion 61, and the first driven plate 623 is respectively arranged at an oblique angle with the second driven plate 624 and the arc-isolating portion 61. The first driven plate 623, the second driven plate 624 and the arc-isolating portion 61 are all plate-shaped, which can reduce the difficulty and cost of processing, and at the same time, the first driven plate 623 is respectively arranged at an oblique angle with the second driven plate 624 and the arc-isolating portion 61, which can reduce the space occupied by the first driven plate 623, the second driven plate 624 and the arc-isolating portion 61, especially before and after the rotation, it can avoid the increase in the volume of the contact module 2 in order to leave space for the movement of the first driven plate 623, the second driven plate 624 and the arc-isolating portion 61. It is understandable that the first driven plate 623, the second driven plate 624 and the arc-isolating portion 61 may also be arc-surface structures, or one or two of them may be arc-surface structures and the others may be plane structures, all of which fall within the protection scope of the present utility model.

[0056] Preferably, the arc-isolating member 6 and the second arc-isolating member have the same structure and are relatively arranged on both sides along the width direction of the moving contact bridge 4. When the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the two active parts 30 on both sides of the contact support 3 respectively drive the arc-isolating member 6 and the second arc-isolating member to rotate toward each other, so that the arc-isolating portion 61 of the arc-isolating member 6 and the second arc-isolating member moves to between the moving contact bridge 4 and the stationary contact 5, and surrounds the side of the moving contact bridge 4 close to the stationary contact 5; the arc-isolating member 6 and the second arc-isolating member can be stacked, or the ends can be plugged and matched to seal between the moving contact bridge 4 and the stationary contact 5. When the contact support 3 drives the moving contact bridge 4 to contact with the two stationary contacts 5, the contact support 3 respectively drives the arc-isolating member 6 and the second arc-isolating member to rotate in a direction away from each other, and moves away from between the moving contact bridge 4 and the stationary contact 5. Of course, as other embodiments, the arc-isolating member 6 and the second arc-isolating member can also be driven to move away by an elastic member.

[0057] Specifically, the structure of the second arc-isolating member is the same as that of the arc-isolating member 6, both of which are provided with an arc-isolating portion 61 and a passive portion 62. The two sides of the contact support 3 are respectively provided with an active portion 30 and a second active portion for driving the arc-isolating member 6 and the second arc-isolating member. When the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the passive portion 62 of the second arc-isolating member and the passive portion 62 of the arc-isolating member 6 are respectively driven to move by the corresponding second active portion and active portion 30, so that the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 rotate toward each other and move between the moving contact bridge 4 and the two stationary contacts 5. By respectively providing the arc-isolating member 6 and the second arc-isolating member in the width direction of the moving contact bridge 4, the moving contact bridge 4 can be shielded from both sides and a more closed space can be formed, so as to avoid the arc moving on the edge of the arc-isolating member 6 when only one arc-isolating member 6 is provided, thereby improving the arc-isolating effect.

[0058] Further, when the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are respectively located between the moving contact bridge 4 and the stationary contact 5, the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are stacked, that is, one of them is located on the side of the other;

[0059] The arc-isolating portion 61 of the second arc-isolating member is in stacked contact with the arc-isolating portion 61 of the arc-isolating member 6 , the upper arc-isolating portion 61 rests on the lower arc-isolating portion 61 , or the arc-isolating portion 61 of the second arc-isolating member is in spaced relation with the arc-isolating portion 61 of the arc-isolating member 6 .

[0060] Alternatively, the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are respectively provided with a docking surface 610. When the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are respectively located between the moving contact bridge 4 and the stationary contact 5, the docking surface 610 of the arc-isolating portion 61 on the second arc-isolating member contacts the docking surface 610 of the arc-isolating portion 61 on the arc-isolating member 6, so that the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are located in the same plane, and the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6 are spliced ​​into a larger arc-isolating structure. Preferably, the mating surface 610 of the arc isolation portion 61 on the second arc isolation member, and the mating surface 610 of the arc isolation portion 61 on the arc isolation member 6 are respectively a sawtooth structure with protruding teeth and grooves, and the protruding teeth can be inserted into the grooves on the other mating surface 610 for cooperation, so that the joints of the two arc isolation portions 61 can be more closely matched and the arc isolation effect can be better.

[0061] By splicing the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating portion 61 of the arc-isolating member 6, the volumes of the arc-isolating portion 61 of the second arc-isolating member and the arc-isolating member 6 can be reduced, thereby reducing the movement space reserved for them, thereby avoiding increasing the volume of the contact module 2.

[0062] Embodiment 2

[0063] like Figure 7 As shown, the arc-isolating member 6 of this embodiment is arranged to move linearly, the contact module 2 is provided with a bracket 7 installed on the cover or integrally formed with the cover, the arc-isolating member 6 is slidably arranged on the bracket 7, the bracket 7 is provided with a slide groove 71 for limiting the arc-isolating member 6, the arc-isolating member 6 can only move along the direction of the slide groove 71, at least one of the active part 30 of the contact support 3 and the passive part 62 of the arc-isolating member 6 is provided with a driving surface 64, the driving surface 64 is arranged at an oblique angle to the moving direction of the contact support 3 and the direction of the slide groove 71, the contact support 3 pushes the passive part 62 of the arc-isolating member 6 through the active part 30, so that the arc-isolating member 6 moves linearly along the direction of the slide groove 71.

[0064] The contact module of this embodiment moves between the moving contact bridge 4 and the stationary contact 5 through the movable arc-isolating member 6 when opening the switch, cuts off the arc between the moving contact bridge 4 and the stationary contact 5 through the arc-isolating member 6, and plays a role of insulating isolation between the moving contact bridge 4 and the stationary contact 5. It not only has a strong arc extinguishing performance when there is no zero-crossing extinguishing, but also the arc-isolating member 6 is arranged to move in a straight line, has the characteristics of simple structure and easy assembly, and the arc-isolating member 6 that moves in a straight line is not easy to get stuck or fall off, and has higher reliability.

[0065] An improvement of this embodiment is that the arc isolation member 6 is provided with an elastic member 8 and a driven portion 62, the elastic member 8 is connected to the arc isolation member 6, and the elastic member 8 is used to drive the arc isolation member 6 to move so that the arc isolation portion 61 is inserted between the moving contact bridge 4 and the static contact 5.

[0066] When the contact support 3 drives the moving contact bridge 4 to contact the two stationary contacts 5, the active part 30 pushes the passive part 62 to lock the elastic member 8 in the energy storage state, and the passive part 62 drives the arc isolation part 61 away from the moving contact bridge 4 and the stationary contacts 5 to avoid affecting the contact between the moving contact bridge 4 and the stationary contacts 5;

[0067] When the contact support 3 drives the moving contact bridge 4 to separate from the two stationary contacts 5, the active part 30 releases the passive part 62, and the elastic member 8 releases energy and drives the arc-isolating part 61 to move between the moving contact bridge 4 and the stationary contacts 5, and the arc between the moving contact bridge 4 and the stationary contacts 5 is cut by the arc-isolating part 61, and the moving contact bridge 4 and the stationary contacts 5 are isolated. This embodiment drives the arc-isolating part 6 to move by releasing the elastic member 8, and has the characteristic of fast movement speed, so that the arc-isolating part 61 can be quickly inserted between the moving contact bridge 4 and the stationary contacts 5.

[0068] Specifically, the arc-isolating member 6 comprises a sliding portion 65 that is slidably matched with the slide groove 71, one end of the sliding portion 65 that is away from the elastic member 8 extends out of the slide groove 71 and is connected to the arc-isolating member 61, the passive portion 62 is arranged on the side of the sliding portion 65, the slide groove 71 is provided with an escape opening for avoiding the passive portion 62, the passive portion 62 extends from the escape opening to the outside of the bracket 7 and cooperates with the active portion 30, and an inclined driving surface 64 is provided on the passive portion 62. When the active portion 30 pushes the driving surface 64, the passive portion 62 drives the sliding portion 65 to compress the elastic member 8, and when the active portion 30 is away from the driving surface 64, the elastic member 8 is extended and drives the sliding portion 65 to move, so that the arc-isolating member 61 is inserted between the moving contact bridge 4 and the static contact 5. Preferably, when the passive portion 62 drives the sliding portion 65 to compress the elastic member 8, the arc-isolating member 61 can be partially or completely retracted into the bracket 7.

[0069] It is understandable that an inclined driving surface 64 may be provided on the active part 30, and no driving surface 64 may be provided on the passive part 62, and the active part 30 may push the passive part 62 to move through the driving surface 64, or inclined driving surfaces 64 may be provided on both the active part 30 and the passive part 62, and the driving surface 64 on the active part 30 may push the driving surface 64 on the passive part 62 to drive the passive part 62 to move, which are all within the protection scope of the present utility model.

[0070] Furthermore, the sliding portion 65 is columnar and can reliably slide with the slide groove 71. The arc-isolating portion 61 is plate-shaped. The length and width of the arc-isolating portion 61 are greater than the length and width of the static contact 5, and can effectively shield the static contact 5 to play an arc-isolating role.

[0071] Further, the elastic member 8 is a cylindrical spring, and the slide groove 71 and the sliding portion 65 are respectively provided with spring grooves (not shown in the figure), and the two ends of the elastic member 8 are respectively inserted into the slide groove 71 and the spring grooves of the sliding portion 65 for limited engagement;

[0072] Alternatively, the slide groove 71 and the sliding portion 65 are respectively provided with spring columns (not shown in the figure), and the two ends of the elastic member 8 are respectively sleeved on the slide groove 71 and the spring columns of the sliding portion 65 for upper limit engagement;

[0073] Alternatively, one of the slide groove 71 and the sliding part 65 is provided with a spring groove, and the other is provided with a spring column, one end of the elastic member 8 is inserted into the spring groove for limiting fit, and the other end is sleeved on the spring column for limiting fit. In addition, multiple sets of springs arranged in parallel can be provided to keep the sliding part 65 balanced and reduce skewness and jamming.

[0074] Furthermore, two opposite guide rails 72 are provided in the slide groove 71, and an escape opening for avoiding the driven part 62 is formed between the two guide rails 72. Balance blocks 66 are respectively provided on the opposite sides of the sliding part 65. The two balance blocks 66 are respectively slidably matched with the two guide rails 72. The balance blocks 66 balance the forces on both sides of the arc isolation member 6, so that the forces on the arc isolation member 6 are balanced, thereby avoiding the problems of skewing and jamming.

[0075] Furthermore, the two guide rails 72 form guide grooves 73 with the side walls of the slide groove 71 away from the side of the sliding part 65, and the balance blocks 66 on both sides of the sliding part 65 are respectively provided with guide blocks 67 inserted into the guide grooves 73 for sliding cooperation, which can further enhance the guiding effect on the movement of the arc isolation member 6.

[0076] Furthermore, a buffer block 74 is provided in the guide groove 73. The buffer block 74 is located on the side of the guide block 67 away from the elastic member 8. The buffer block 74 is used to absorb the impact force of the arc isolation member 6 to avoid direct collision between the arc isolation member 6 and the bracket 7, thereby extending the service life.

[0077] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0078] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising an electromagnetic system (1) and a contact module (2), wherein the contact module (2) comprises a contact support (3), a moving contact bridge (4) and two stationary contacts (5), wherein the moving contact bridge (4) is arranged on the contact support (3), and the electromagnetic system (1) is used to drive the contact support (3) to drive the moving contact bridge (4) to move linearly, so that both ends of the moving contact bridge (4) are in contact with and separated from the two stationary contacts (5) at the same time, characterized in that: The invention comprises at least one movable arc-isolating member (6); when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to separate, the arc-isolating member (6) moves between the moving contact bridge (4) and the two stationary contacts (5); when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to contact, the arc-isolating member (6) moves away from between the moving contact bridge (4) and the two stationary contacts (5).

2. The circuit breaker according to claim 1, characterized in that: It also comprises an elastic member (8), and when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to separate, the elastic member (8) drives the arc isolation member (6) to move between the moving contact bridge (4) and the two stationary contacts (5).

3. The circuit breaker according to claim 1, characterized in that: When the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to separate, the contact support (3) simultaneously drives the arc-isolating member (6) to move between the moving contact bridge (4) and the two stationary contacts (5); and / or, when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to come into contact, the contact support (3) simultaneously drives the arc-isolating member (6) to move away from between the moving contact bridge (4) and the two stationary contacts (5).

4. The circuit breaker according to claim 1, characterized in that: The two contact modules (2) are provided with the electromagnetic system (1) between the two contact modules (2). The electromagnetic system (1) comprises a moving iron core and a coil and a stationary iron core for driving the moving iron core to move. The moving iron core is provided with a linkage rod (10). Both ends of the linkage rod (10) are connected to the contact supports (3) of the two contact modules (2) so as to drive the contact supports (3) in the two contact modules (2) to move.

5. The circuit breaker according to claim 4, characterized in that: At least one arc-isolating member (6) is provided between the electromagnetic system (1) and the two contact modules (2); when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to separate, the linkage rod (10) drives the arc-isolating member (6) to move between the moving contact bridge (4) and the two stationary contacts (5); and / or when the contact support (3) drives the moving contact bridge (4) and the two stationary contacts (5) to contact, the linkage rod (10) drives the arc-isolating member (6) to move away from between the moving contact bridge (4) and the two stationary contacts (5).

6. The circuit breaker according to claim 1, characterized in that: The arc-isolating member (6) comprises at least one arc-isolating portion (61) and at least one driven portion (62); the driven portion (62) is subjected to force so that the arc-isolating portion (61) of the arc-isolating member (6) moves to between the moving contact bridge (4) and the two stationary contacts (5), and / or moves away from between the moving contact bridge (4) and the two stationary contacts (5).

7. The circuit breaker according to claim 6, characterized in that: The number of the arc-isolating member (6) is one, and the arc-isolating member (6) comprises two arc-isolating portions (61) for being respectively inserted between the moving contact bridge (4) and the stationary contacts (5) at both ends; or the number of the arc-isolating member (6) is two, and the two arc-isolating members (6) respectively comprise an arc-isolating portion (61) for being respectively inserted between the moving contact bridge (4) and the stationary contacts (5) at both ends.

8. The circuit breaker according to claim 6, characterized in that: The arc-isolating member (6) is provided with two coaxially arranged rotating parts (63), the two rotating parts (63) protrude outward respectively, and the driven part (62) is subjected to force to cause the arc-isolating member (6) to rotate around the axes of the two rotating parts (63), and drive the arc-isolating part (61) to rotate into and / or rotate out of between the moving contact bridge (4) and the stationary contact (5).

9. The circuit breaker according to claim 6, characterized in that: It also includes second arc-isolating members, the number of which is the same as that of the arc-isolating members (6), the second arc-isolating members and the arc-isolating members (6) are arranged relatively on both sides of the moving contact bridge (4) along the width direction of the moving contact bridge (4), the structure of the second arc-isolating members is the same as that of the arc-isolating members (6), when the contact support (3) drives the moving contact bridge (4) to separate from the two stationary contacts (5), the arc-isolating portion (61) of the second arc-isolating member and the arc-isolating portion (61) of the arc-isolating member (6) move towards each other and move to between the moving contact bridge (4) and the two stationary contacts (5), when the contact support (3) drives the moving contact bridge (4) to contact with the two stationary contacts (5), the arc-isolating portion (61) of the second arc-isolating member and the arc-isolating portion (61) of the arc-isolating member (6) move in a direction away from each other and move away from between the moving contact bridge (4) and the two stationary contacts (5).

10. The circuit breaker according to claim 6, characterized in that: The contact support (3) is provided with an active part (30) for driving the driven part (62) to move. The arc-isolating member (6) includes two driven parts (62), and the two driven parts (62) are respectively a closing driven part (621) and an opening driven part (622). The closing driven part (621) and the opening driven part (622) are respectively provided with a closing contact surface and an opening contact surface on the side close to the active part (30), and the closing contact surface and the opening contact surface are arranged at an oblique angle. The active part (30) is arranged between the closing contact surface and the opening contact surface, and is used to push the closing contact surface and the opening contact surface respectively, so that the closing driven part (621) and the opening driven part (622) rotate to a side away from the closing contact surface and the opening contact surface respectively. The arc-isolating member (61) is arranged on a side of the arc-isolating member (6) at the rotation center close to the closing driven part (621).

11. The circuit breaker according to claim 10, characterized in that: The closing actuated part (621) is arranged on a side of the active part (30) close to the stationary contact (5); when the contact support (3) drives the moving contact bridge (4) to contact the two stationary contacts (5), it drives the active part (30) to push the closing actuated part (621), so that the arc-isolating part (61) leaves the space between the moving contact bridge (4) and the two stationary contacts (5); the opening actuated part (622) is arranged on a side of the active part (30) away from the stationary contact (5); when the contact support (3) drives the moving contact bridge (4) to separate from the two stationary contacts (5), it drives the active part (30) to push the opening actuated part (622), so that the arc-isolating part (61) moves to between the moving contact bridge (4) and the two stationary contacts (5).

12. The circuit breaker according to claim 10, characterized in that: The arc-isolating member (6) comprises two connected actuated plates, the two actuated plates being respectively a first actuated plate (623) and a second actuated plate (624); the first actuated plate (623) being arranged on a side of the second actuated plate (624) close to the stationary contact (5); the arc-isolating portion (61) being connected to the first actuated plate (623); the first actuated plate (623) and the second actuated plate (624) being respectively provided with an actuated portion (62) protruding toward the same side; and the actuated portion (62) of the first actuated plate (623) and the actuated portion (62) on the second actuated plate (624) being arranged at intervals, respectively serving as a closing actuated portion (621) and an opening actuated portion (622).

13. The circuit breaker according to claim 10, characterized in that: The arc-isolating member (6) comprises two connected actuated plates, the two actuated plates being respectively a first actuated plate (623) and a second actuated plate (624); the first actuated plate (623) being arranged on a side of the second actuated plate (624) close to the stationary contact (5); the arc-isolating portion (61) being connected to the first actuated plate (623); the first actuated plate (623) being provided with rotating portions (63) at opposite ends thereof; the active portion (30) on the contact support (3) extending to the side surfaces of the first actuated plate (623) and the second actuated plate (624); the first actuated plate (623) and the second actuated plate (624) serving as a closing actuated portion (621) and an opening actuated portion (622) respectively; the active portion (30) directly pushes the first actuated plate (623) and the second actuated plate (624) to drive the arc-isolating member (6) to rotate.

14. The circuit breaker according to claim 12 or 13, characterized in that: The first driven plate (623), the second driven plate (624) and the arc-isolating portion (61) are all plate-shaped, the first driven plate (623) is connected between the second driven plate (624) and the arc-isolating portion (61), and the first driven plate (623) is arranged at an oblique angle to the second driven plate (624) and the arc-isolating portion (61), respectively.

15. The circuit breaker according to claim 10, characterized in that: It also includes second arc-isolating members, the number of which is the same as that of the arc-isolating members (6), the second arc-isolating members and the arc-isolating members (6) are arranged on both sides of the moving contact bridge (4) in a relative manner along the width direction of the moving contact bridge (4), the structure of the second arc-isolating members is the same as that of the arc-isolating members (6), and the two sides of the contact support (3) are respectively provided with an active part (30) and a second active part for driving the arc-isolating member (6) and the second arc-isolating member, when the contact support (3) drives the moving contact bridge (4) to separate from the two stationary contacts (5), the second active part and the active part (30) respectively drive the passive part (62) of the second arc-isolating member and the passive part (62) of the arc-isolating member (6) to move, so that the arc-isolating part (61) of the second arc-isolating member and the arc-isolating part (61) of the arc-isolating member (6) rotate toward each other and move between the moving contact bridge (4) and the stationary contacts (5).

16. The circuit breaker according to claim 15, characterized in that: When the arc isolation portion (61) of the second arc isolation member and the arc isolation portion (61) of the arc isolation member (6) are respectively located between the moving contact bridge (4) and the stationary contact (5), the arc isolation portion (61) of the second arc isolation member and the arc isolation portion (61) of the arc isolation member (6) are stacked.

17. The circuit breaker according to claim 15, characterized in that: The arc-isolating portion (61) of the second arc-isolating member and the arc-isolating portion (61) of the arc-isolating member (6) are respectively provided with a butt joint surface (610). When the arc-isolating portion (61) of the second arc-isolating member and the arc-isolating portion (61) of the arc-isolating member (6) are respectively located between the moving contact bridge (4) and the stationary contact (5), the butt joint surface (610) of the arc-isolating portion (61) of the second arc-isolating member contacts the butt joint surface (610) of the arc-isolating portion (61) of the arc-isolating member (6), so that the arc-isolating portion (61) of the second arc-isolating member and the arc-isolating portion (61) of the arc-isolating member (6) are located in the same plane.

18. The circuit breaker according to any one of claims 10-13, 15-17, characterized in that: The contact module (2) also includes a cover shell, wherein the contact support (3), the movable contact bridge (4), the two stationary contacts (5) and the arc-isolating member (6) are all arranged in the cover shell, and the arc-isolating member (6) is rotatably mounted on the cover shell.

19. The circuit breaker according to claim 18, characterized in that: The contact module (2) further comprises two arc extinguishing chambers (20) which are arranged relatively at two ends of the moving contact bridge (4) along the length direction of the moving contact bridge (4); the two arc extinguishing chambers (20) are located at two opposite ends of the cover shell; the contact support (3) and the static contact (5) are arranged between the two arc extinguishing chambers (20); the contact support (3) is arranged on the side of the moving contact bridge (4) away from the static contact (5) along the thickness direction of the moving contact bridge (4); and the contact support (3) is used to drive the moving contact bridge (4) to move along the thickness direction of the moving contact bridge (4); the two static contacts (5) are arranged relatively to the two ends of the moving contact bridge (4); and conductive plates connected to the two static contacts (5) are respectively arranged on the sides of the two static contacts (5) away from the moving contact bridge (4).

20. The circuit breaker according to claim 1, characterized in that: The arc isolation member (6) is arranged to rotate or to move linearly.

Images