CN116978744A

CN116978744A - a circuit breaker

Info

Publication number: CN116978744A
Application number: CN202210435855.1A
Authority: CN
Inventors: 赵小苇; 邹瑞; 张家政
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2023-10-31

Abstract

The application provides a circuit breaker, which belongs to the technical field of low-voltage electrical appliances, and comprises a casing which is rectangular as a whole, wherein a toggle handle, an operating mechanism, a contact system and a wiring terminal are sequentially arranged in the casing along the length direction, the handle is linked with the operating mechanism, and the contact system can be driven to realize opening or closing when the handle rotates; the wiring terminal comprises an inlet wire end and an outlet wire end which are arranged on one side of the shell, and the handle is arranged on the other side of the shell opposite to the wiring terminal; the handle comprises a driving part and a handle rod which are connected, and the driving part is rotatably arranged in the shell and is connected with the operating mechanism through a connecting rod. The wire inlet end and the wire outlet end are both arranged at the rear end of the circuit breaker, and the mode of back-in and back-out effectively avoids the false disassembly and the pulling of the circuit and ensures the safety in the process of disassembling and pulling the circuit breaker. The toggle handle meets the use habit of a customer, and the satisfaction degree and experience sense of the customer are improved.

Description

Circuit breaker

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a circuit breaker.

Background

The breaker is a switching device widely used in life, and can cut off and switch on a load circuit and a fault circuit, prevent accidents from expanding, ensure safe operation, and complete the opening or closing of a system by driving a handle during operation. The existing 1U breaker is driven by a button type handle in a switching-on and switching-off operation mode, so that certain requirements of customers cannot be met; and the system is to lead in from the rear end of the circuit breaker and lead out from the front end of the circuit breaker, so that the circuit can be detached and pulled out by mistake.

Disclosure of Invention

The application aims to provide a circuit breaker, wherein an incoming line and an outgoing line are positioned on the same side of the circuit breaker, so that the false disassembly and the pulling of a circuit are effectively avoided, and the circuit breaker is suitable for the demands of customers through a poking type handle.

Embodiments of the present application are implemented as follows:

an aspect of the embodiment of the application provides a circuit breaker, which comprises a casing with a rectangular shape as a whole, wherein a toggle handle, an operating mechanism, a contact system and a wiring terminal are sequentially arranged in the casing along the length direction, the handle and the operating mechanism are linked, and when the handle rotates, the contact system can be driven to realize opening or closing; the wiring terminal comprises an inlet wire end and an outlet wire end which are arranged on the same side of the shell, and the handle is arranged on the other side of the shell opposite to the wiring terminal; the handle comprises a driving part and a handle rod which are connected, wherein the driving part is rotatably arranged in the shell and is connected with the operating mechanism through a connecting rod.

Optionally, an unlocking mechanism is further arranged in the shell, and the circuit breaker and the cabinet are unlocked through the unlocking mechanism, so that the circuit breaker is in a pullable state until the circuit breaker is pulled out of the cabinet; at least one operation position is arranged on the shell and is used for triggering the unlocking mechanism.

The unlocking mechanism comprises an unlocking rod and a buckle rotatably arranged in the shell, one end of the buckle can extend out of the shell and is used for being matched with the cabinet, the buckle is driven to rotate through the unlocking rod, and the buckle is retracted into the shell to unlock.

Optionally, the operation position includes an opening provided on the housing, one end of the unlocking lever corresponds to the opening, and the other end of the unlocking lever is provided with a first abutting surface; the buckle is provided with a top end extending out of the shell, a middle end matched with the unlocking rod and a bottom end matched with the operating mechanism, the middle end of the buckle is provided with a second supporting surface matched with the first supporting surface, the unlocking rod is driven, and the buckle is enabled to rotate and retract into the shell through the supporting of the first supporting surface and the second supporting surface.

Optionally, when the circuit breaker is in a closing state, the unlocking rod drives the buckle to rotate, and after driving the buckle to retract into the shell, the other end of the buckle is also propped against the operating mechanism so as to drive the operating mechanism to open the brake; when the circuit breaker is in a closing state, the circuit breaker is installed, the cabinet extrudes the buckle to enable the buckle to retract into the shell, and the operating mechanism is driven to open.

Optionally, the bottom end of the buckle is further provided with a third supporting surface, and the third supporting surface is used for supporting with a locking piece of the operating mechanism so as to drive the operating mechanism to act, so that the operating mechanism is turned from closing to opening.

Optionally, the unlocking mechanism may be further arranged in linkage with the handle, and when the circuit breaker is in a closing state, the unlocking lever drives the buckle to rotate, so that after the buckle is driven to retract into the shell, the buckle can drive the handle to open; when the circuit breaker is in a closing state, the circuit breaker is installed, the cabinet extrudes the buckle so that the buckle is retracted into the shell, and the buckle can drive the handle to open.

Optionally, the unlocking mechanism further comprises a reset piece, the reset piece is rotatably arranged in the shell, and two ends of the reset piece are respectively arranged on the unlocking rod and the buckle.

Optionally, an electromagnetic release and a double-gold system are further arranged between the handle and the operating mechanism, and the electromagnetic release and the double-gold system are oppositely arranged at two sides in the shell along the length direction perpendicular to the shell.

Optionally, the electromagnetic release, the double-gold system and the moving contact of the contact system are sequentially and flexibly connected.

Optionally, the shell is further provided with a first copper bar and a second copper bar opposite to each other in a direction perpendicular to the length direction of the shell, the incoming line end is connected with the electromagnetic release through the first copper bar, and the outgoing line end is connected with the fixed contact of the contact system through the second copper bar.

Optionally, an arc extinguishing chamber is further arranged between the contact system and the wiring terminal, and an opening of the arc extinguishing chamber faces the contact system; the arc extinguishing chamber comprises an arc extinguishing chamber body, wherein an arc extinguishing chamber is arranged at the opening of the arc extinguishing chamber body, the arc extinguishing chamber body is provided with a contact system, and the contact system is connected with the arc extinguishing chamber body; and a third copper bar is arranged between the second copper bar and the arc extinguishing chamber, and the second gas generating piece is used for isolating the fixed contact of the contact system from the third copper bar.

Optionally, the arc extinguishing chamber further comprises a filter screen, and the filter screen is located between the inlet wire end and the outlet wire end.

Optionally, an arc barrier is arranged at the end of the circuit breaker, where the wiring terminal is arranged.

The beneficial effects of the embodiment of the application include:

according to the circuit breaker provided by the embodiment of the application, the handle, the operating mechanism, the contact system and the wiring terminal are sequentially arranged in the overall rectangular shell along the length direction, the handle adopts a toggle structure, the toggle handle can drive the operating mechanism which is arranged in linkage with the handle to act, and the operating mechanism drives the contact system to complete switching-off or switching-on. Binding post and handle set up respectively in the opposite side of casing, and wherein binding post includes inlet wire end and outlet wire end, all arranges inlet wire end and outlet wire end at the rear end of circuit breaker, and this kind of mode of back business turn over has effectively avoided the mistake of circuit to tear open and has been pulled out, has guaranteed the security of tearing open the circuit breaker in-process. The toggle handle meets the use habit of a customer, and the satisfaction degree and experience sense of the customer are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a breaker switching-off state according to an embodiment of the present application;

fig. 2 is a schematic diagram of a closing state of a circuit breaker according to an embodiment of the present application;

fig. 3 is a schematic diagram of a circuit breaker handle according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an unlocking mechanism of a circuit breaker according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a circuit breaker operating mechanism according to an embodiment of the present application;

fig. 6 is a schematic diagram of matching a circuit breaker and a cabinet according to an embodiment of the present application;

fig. 7 is a schematic diagram of an arc extinguishing chamber of a circuit breaker according to an embodiment of the present application;

fig. 8 is a schematic diagram of a circuit breaker main circuit provided in an embodiment of the present application;

fig. 9 is a schematic diagram of a main layout structure of a circuit breaker according to an embodiment of the present application;

fig. 10 is a schematic diagram of a circuit breaker main body layout structure according to an embodiment of the application.

Icon: 100-circuit breaker; 101-a housing; 102-a handle; 1021-a handle bar; 1022—a driving section; 1023-mounting holes; 103-unlocking mechanism; 1030-snap; 1030 a-a bearing surface; 1030 b-a second abutment surface; 1030 c-a third abutment surface; 1030 d-extension; 1031-unlocking the lever; 1031 a-grooves; 1031 b-a first abutment surface; 1032—a reset element; 104-an electromagnetic release; 105-contact system; 1051-moving contact; 1052-stationary contacts; 1053-bending plate; 106, an arc extinguishing chamber; 106 a-opening; 1061—a first gas generating member; 1062-a second gas-generating member; 1063-screen; 107-a first copper bar; 108 a-a wire inlet end; 108 b-wire end; 109-a second copper bar; 110-a third copper bar; 110 a-an arc initiation end; 110 b-a bend; 110 c-a connection terminal; 111a, 111b, 111 c-flexible wiring; 112-an operating mechanism; 1121-a catch piece; 1121 a-contact surface; 113-a double gold system; 114-a connecting rod; 115-arc baffles; 200-cabinet.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The existing 1U circuit breaker is driven by a button type handle during opening and closing, and cannot meet certain requirements of customers; on the other hand, the system is used for leading in wires from the rear end of the circuit breaker and leading out wires from the front end of the circuit breaker, so that the wires can be detached and pulled out by mistake.

In order to solve the above-mentioned problems, an embodiment of the present application provides a circuit breaker 100, as shown in fig. 1 and 2, which includes a housing 101 having a rectangular shape as a whole, a toggle handle 102, an operating mechanism 112, a contact system 105 and a connection terminal are sequentially disposed in the housing 101 along a length direction, the handle 102 and the operating mechanism 112 are linked, and when the handle 102 rotates, the contact 1051 can be driven to realize opening or closing; the connection terminal comprises a wire inlet end 108a and a wire outlet end 108b which are arranged on the same side of the shell 101, and the handle 102 is arranged on the other side of the shell 101 opposite to the connection terminal.

The handle 102 is located at the front end of the housing 101, and as shown in fig. 3, the handle 102 includes a driving part 1022 and a handle lever 1021 which are connected, the driving part 1022 being rotatably provided in the housing 101, and the driving part 1022 being provided with a square hole at the center thereof, for example, to be rotatable with respect to the housing 101 by a mating square rotation shaft. The peripheral wall of the driving part 1022 is also provided with a mounting hole 1023, and a connecting rod 114 is arranged through the mounting hole 1023 to be connected with the operating mechanism 112, and the connecting rod 114 can be a U-shaped connecting rod; the handle 1021 extends out of the housing 101 for operation, and for example, the handle 1021 in the present application has a plate-shaped structure, the plate-shaped handle 1021 has a large surface area, a good and stable hand feeling when being held by a customer, and anti-slip patterns are provided on the surface of the handle 1021 for operation. The handle 102 adopts a toggle mode, and the handle rod 1021 is toggled to drive the driving part 1022 to rotate, so as to drive the operating mechanism 112 linked with the driving part 1022 to act, and the contact system 105 is enabled to complete switching-off or switching-on. The handle 102 is driven in a toggle mode, so that the use habit of a customer is met, and the customer satisfaction is improved.

A terminal is provided at the rear end of the housing 101, and includes a wire inlet end 108a and a wire outlet end 108b, the wire inlet end 108a and the wire outlet end 108b being located at the same side of the housing 101 and being located at the top and bottom in the housing 101, respectively. The wire inlet end 108a and the wire outlet end 108b are arranged on the same side of the shell 101, and are connected in a mode of back in and back out (back-end wire inlet and back-end wire outlet), so that the error disassembly and the pulling of the circuit can be avoided, and the safety in the process of disassembling and pulling the circuit breaker 100 is ensured.

The whole casing 101 is cuboid, and handle 102, operating device 112, contact system 105 and binding post arrange in proper order along casing 101 length direction, have effectively utilized casing 101's space, make circuit breaker 100 overall arrangement reasonable.

Illustratively, the actuator 112 is located at the center of the front end of the housing 101, although the actuator 112 may be located above or below the front end of the housing 101, which is not particularly limited in this regard.

In summary, in the circuit breaker 100 provided by the embodiment of the application, the handle 102, the operating mechanism 112, the contact system 105 and the connecting terminal are sequentially arranged in the overall rectangular casing 101 along the length direction, the handle 102 adopts a toggle structure, the toggle handle 102 can drive the operating mechanism 112 which is arranged in linkage with the handle 102 to act, and the operating mechanism 112 drives the contact 1051 to complete switching-on or switching-off. The wiring terminal and the handle 102 are respectively arranged on opposite sides of the casing 101, wherein the wiring terminal comprises a wire inlet end 108a and a wire outlet end 108b, the wire inlet end 108a and the wire outlet end 108b are both arranged at the rear end of the circuit breaker 100, and the mode of back-in and back-out effectively avoids the false disassembly of a circuit, and ensures the safety in the process of disassembling and disassembling the circuit breaker 100. The toggle handle 102 meets the use habit of the customer, and improves the satisfaction degree and experience feeling of the customer.

Further, an unlocking mechanism 103 is further arranged in the shell 101, and the unlocking mechanism 103 is used for unlocking the circuit breaker 100 and the cabinet 200, so that the circuit breaker 100 can be in a pullable state until the circuit breaker 100 is pulled out of the cabinet 200; at least one operating position is provided on the housing 101 for triggering the unlocking mechanism 103.

The operating position is for extending a tool into the housing 101 and for engaging the unlocking mechanism 103, and for operating the unlocking mechanism 103 for unlocking. Illustratively, the operating position on the housing 101 in the present application is an opening provided on the housing 101 at an end proximate to the handle 102.

The unlocking mechanism 103 comprises an unlocking rod 1031 and a buckle 1030 rotatably arranged in the shell 101, one end of the buckle 1030 can extend out of the shell 101 to be matched with the cabinet 200, the buckle 1030 is driven to rotate by the unlocking rod 1031, and the buckle 1030 is retracted into the shell 101 to unlock, so that the circuit breaker 100 is in a pullable state until the circuit breaker 100 is pulled out of the cabinet 200.

Illustratively, the unlocking mechanism 103 is located at the top within the housing 101, and the unlocking lever 1031 of the unlocking mechanism 103 extends out of the opening of the housing 101 along the length direction of the housing 101 for cooperative operation; one end of the catch 1030 of the unlocking mechanism 103 protrudes outside the housing 101 in a direction perpendicular to the length direction of the housing 101 until it protrudes into the cabinet 200 to lock the circuit breaker 100 and the cabinet 200. The unlocking mechanism 103 can be pulled to act no matter when the circuit breaker 100 is in a switching-off state or a switching-on state; the unlocking mechanism 103 is pulled by the unlocking bar 1031, the buckle 1030 is driven to rotate so as to enable the buckle 1030 to retract into the shell 101, the locking state of the cabinet 200 is released, unlocking is achieved, and the circuit breaker 100 is in a drawable state; continued pulling of the unlocking mechanism 103 pulls the circuit breaker 100 out of the cabinet 200.

Further, the unlocking mechanism 103 can also drive the operation mechanism 112 to operate to open the circuit breaker 100 when the circuit breaker 100 is in the closed state. As shown in fig. 2, when the circuit breaker 100 is in a closing state, the unlocking lever 1031 drives the buckle 1030 to rotate, and after the buckle 1030 is driven to retract into the housing 101, the other end of the buckle 1030 can be abutted against the operating mechanism 112, and when the unlocking mechanism 103 is pulled continuously, the operating mechanism 112 can be driven to break the gate through the buckle 1030.

When the circuit breaker 100 is in the on state, the circuit breaker 100 is mounted, and the cabinet 200 presses the buckle 1030 to retract the buckle 1030 into the housing 101, so as to drive the operating mechanism 112 to open. As shown in fig. 1, when the circuit breaker 100 is in the open state, the latch 1030 is retracted into the housing 101 and is not in contact with the operating mechanism 112, so that the unlocking mechanism 103 cannot drive the operating mechanism 112 to act. In addition, in one possible embodiment of the present application, the unlocking mechanism 103 cannot be triggered to operate by the operating handle 102, so that the misoperation of the operating handle 102 to the unlocking mechanism 103 is avoided.

Through the setting of release mechanism 103, when circuit breaker 100 installs, buckle 1030 receives rack 200 extrusion to retract in the casing 101, and handle 102 can drive operating mechanism 112 action, because the bottom of buckle 1030 supports with operating mechanism 112, consequently handle 102 can't drive operating mechanism 112 to the combined floodgate state, so can prevent the combined floodgate of installation and insert, avoided circuit breaker 100 when installing, because of touching release mechanism 103 or handle 102 by mistake, and make circuit breaker 100 combined floodgate, and then produce danger, guaranteed the security of installation.

In another embodiment of the present application, the unlocking mechanism 103 may be provided in conjunction with the handle 102, and the handle 102 is triggered by the unlocking mechanism 103 to actuate the operation mechanism 112. The principle of the mechanism is consistent with that the buckle 1030 directly triggers the operation mechanism 112 to act, when the circuit breaker 100 is in a closing state, the buckle 1030 is driven to rotate by the unlocking lever 1031, and after the buckle 1030 is driven to retract into the shell 101, the buckle 1030 can drive the handle 102 to open through the operation mechanism 112.

When the circuit breaker 100 is in a closing state, the circuit breaker 100 is installed, the cabinet 200 presses the buckle 1030 to enable the buckle 1030 to retract into the shell 101, and the buckle 1030 can drive the handle 102 to open through the operating mechanism 112.

As shown in fig. 4, the specific structure of the unlocking mechanism 103 is shown in fig. 4, the unlocking mechanism 103 includes an unlocking lever 1031, a buckle 1030 and a reset piece 1032, one end of the unlocking lever 1031 is provided with a groove 1031a, the groove 1031a corresponds to an opening of the housing 101, in the present application, the groove 1031a is flush with the opening, and of course, the groove 1031a may be lower than the opening or extend out of the opening. The unlocking lever 1031 is operated to move through the groove 1031a, for example, a screwdriver can be inserted into the groove 1031a to pull the unlocking lever 1031, or a special tool can be used for operation, and the specific mode is not limited; the other end of the unlocking lever 1031 is engaged with the catch 1030, and a first abutting surface 1031b facing the front end of the housing 101 is provided on the end.

The buckle 1030 is rotatably arranged in the shell 101, and in the application, the buckle 1030 is in a step structure, for example, the top end of the buckle 1030 extends out of the shell 101, the top end of the buckle 1030 is provided with a supporting surface 1030a, and the buckle 1030 is enabled to be in contact with the shell 101 and the cabinet 200 through the supporting surface 1030 a; the middle end of the buckle 1030 is provided with a boss, the boss is provided with a second supporting surface 1030b matched with the first supporting surface 1031b of the unlocking lever 1031, when the unlocking lever 1031 is pulled, the first supporting surface 1031b and the second supporting surface 1030b act to drive the buckle 1030 to rotate clockwise, so that the supporting surface 1030a of the buckle 1030 is released from abutting with the shell 101 and the cabinet 200, the buckle 1030 is retracted into the shell 101, unlocking is completed, and the circuit breaker 100 is in a pullable state; when the unlocking lever 1031 is pulled, the protruding end 1030d of the buckle 1030 abuts against the housing 101, and the housing 101 is pulled out from the cabinet 200.

Specifically, the bottom end of the buckle 1030 is provided with a third supporting surface 1030c, and the third supporting surface 1030c is used for supporting the locking piece 1121 of the operating mechanism 112 after the buckle 1030 is retracted into the housing 101, so as to drive the operating mechanism 112 to act, so that the operating mechanism 112 is switched from closing to opening. As shown in fig. 5, the latch 1121 has a contact surface 1121a, and is held by the contact surface 1121a and a third holding surface 1030c at the bottom end of the latch 1030, so as to drive the operating mechanism 112 to open after the latch 1030 is retracted into the housing 101.

Fig. 6 shows a state diagram of the installation of the circuit breaker 100 and the cabinet 200, where the top end of the buckle 1030 extends into the cabinet 200 to enable the circuit breaker 100 to abut and lock with the cabinet 200 through the abutting surface 1030a of the buckle 1030, so as to ensure normal operation. When unlocking is required, the buckle 1030 is rotated to retract into the housing 101 by pulling the unlocking lever 1031 rightward, the circuit breaker 100 is in a state that can be pulled, and the circuit breaker 100 can be pulled out from the cabinet 200 by continuing to pull the unlocking lever 1031.

Taking closing as an example, the unlocking process specifically comprises the following steps: when the circuit breaker 100 is in the on state shown in fig. 2, the unlocking lever 1031 is pulled outwards by the groove 1031a of the unlocking lever 1031, the unlocking lever 1031 acts by the first abutting surface 1031b and the second abutting surface 1030b of the buckle 1030 to drive the buckle 1030 to rotate clockwise, at this time, the abutting surface 1030a at the top end of the buckle 1030 is released from abutting with the housing 101 and the cabinet 200, the buckle 1030 is retracted into the housing 101 to unlock, and the circuit breaker 100 is in the pullable state. After the buckle 1030 is retracted into the shell 101, the bottom end of the buckle 1030 is close to the locking piece 1121, and the bottom end of the buckle 1030 drives the contact surface 1121a of the locking piece 1121 through the third supporting surface 1030c so as to enable the locking piece 1121 to act, and the brake separation is completed; continuing to pull the unlocking lever 1031, the extending end of the buckle 1030 abuts against the housing 101, and the circuit breaker 100 is pulled out of the cabinet 200 in cooperation with the action of pulling the unlocking lever 1031.

After unlocking is completed, the mechanism needs to be reset, so that the unlocking mechanism 103 further comprises a reset piece 1032, the reset piece 1032 can be a reset spring, the reset spring is rotatably arranged in the shell 101, and two ends of the reset spring are respectively arranged on the unlocking lever 1031 and the buckle 1030. After the pulling force of the unlocking lever 1031 disappears, the reset member 1032 returns the buckle 1030 to the initial state, and the reset of the unlocking mechanism 103 is completed. Other resettable structures besides the return spring can be used as the resetting member 1032 to perform a resetting function, such as a rubber band, etc., and are not limited to the return spring.

On the other hand, an electromagnetic release 104 and a double-gold system 113 are further arranged between the handle 102 and the operating mechanism 112, and the electromagnetic release 104 and the double-gold system 113 are oppositely arranged at two sides in the housing 101 along the length direction perpendicular to the housing 101.

Illustratively, the electromagnetic release 104 and the bifold system 113 are both located at the front end of the housing 101, the electromagnetic release 104 being configured to open the circuit breaker 100 when the circuit breaker 100 is shorted; the dual-gold system 113 is used for opening the circuit breaker 100 when the circuit breaker 100 is overloaded, and has a protection function on the circuit breaker 100, and the principle is consistent with the existing structure, and is not repeated here.

Because the circuit breaker 100 adopts a wiring mode of backward in and backward out, a wiring board is not required to be installed at the front end of the circuit breaker 100, the space is large, the solenoid electromagnetic release 104 with shorter response time can be placed, and the breaking capacity is improved.

The shell 101 is further provided with a first copper bar 107 and a second copper bar 109 opposite to each other in a length direction perpendicular to the shell 101, the incoming line end 108a is connected with the electromagnetic release 104 through the first copper bar 107, and the outgoing line end 108b is connected with the fixed contact 1052 of the contact system 105 through the second copper bar 109.

An arc extinguishing chamber 106 is further arranged between the contact system 105 and the wiring terminal, an opening 106a of the arc extinguishing chamber 106 faces the contact system 105, and an arc generated by the contact system 105 is led into the arc extinguishing chamber 106 for arc extinguishing.

As shown in fig. 7, an opening 106a of the arc extinguishing chamber 106 is provided with a gas generating structure, the gas generating structure comprises a first gas generating part 1061 and a second gas generating part 1062 which are oppositely arranged at two sides of the opening 106a, the first gas generating part 1061 and the second gas generating part 1062 are relatively arranged in parallel, an arc striking channel is formed between the first gas generating part 1061 and the second gas generating part 1062, the arc striking channel is communicated with the opening 106a of the arc extinguishing chamber 106, and the first gas generating part 1061 and the second gas generating part 1062 are used for accelerating and guiding an arc generated by the contact system 105 into the arc extinguishing chamber 106; a third copper bar 110 is further disposed between the second copper bar 109 and the arc extinguishing chamber 106, and the second gas generating member 1062 isolates the stationary contact 1052 of the contact system 105 from the third copper bar 110. As shown in fig. 9, two sides of the second gas generating member 1062 along the height direction of the housing 101 are respectively a third copper bar 110 and a fixed contact 1052, one side of the second gas generating member 1062 close to the fixed contact 1052 is a C-shaped cross section, and forms a sealed cavity with the housing 101, and the fixed contact 1052 is in the sealed cavity; the second gas generating member 1062 isolates the stationary contact 1052 from the third copper bar 110, and plays an insulating protection role.

Specifically, as shown in fig. 8, a third copper bar 110 is further disposed above the second copper bar 109, the third copper bar 110 has an arc striking end 110a and a connection end 110c, and an arc extinguishing chamber 106 is disposed above the arc striking end 110a of the third copper bar 110, and an arc is introduced into the arc extinguishing chamber 106 through the arc striking end 110 a. A bending part 110b is arranged between the connecting end 110c and the arc striking end 110a, the bending part 110b stretches into an arc striking channel between the first gas generating piece 1061 and the second gas generating piece 1062, the top end of the bending part 110b is close to the moving contact 1051 but is not in contact with the moving contact 1051, and the moving contacts 1051 of the electromagnetic release 104, the double-gold system 113 and the contact system 105 are sequentially and flexibly connected through the connecting end 110c of the third copper bar 110. The current direction of the main loop is as follows: after the movable contact 1051 is contacted with the fixed contact 1052, the current is led into the fixed contact 1052, the fixed contact 1052 is connected with the second copper bar 109 through the bending plate 1053, and the current is led into the second copper bar 109 and flows out from the outlet end 108 b.

As shown in fig. 10, the arc extinguishing chamber 106 further includes a filter net 1063, and the filter net 1063 is located between the incoming end 108a and the outgoing end 108b, so as to filter the gas generated by arc extinguishing. Illustratively, screen 1063 is a U-shaped structure with the U-shaped opening facing wire outlet end 108b, and screen 1063 may be made of steel material to improve structural strength.

In addition, the end of the circuit breaker 100 provided with the terminal is provided with the arc-shield 115, the arc-shield 115 extends out of the housing 101, and the arc-shield 115 is used for increasing the creepage distance, so that breakdown of the terminal can be prevented.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The circuit breaker (100) is characterized by comprising a casing (101) which is integrally rectangular, wherein a toggle handle (102), an operating mechanism (112), a contact system (105) and a wiring terminal are sequentially arranged in the casing (101) along the length direction, the handle (102) is linked with the operating mechanism (112), and when the handle (102) rotates, the contact system (105) can be driven to realize switching-off or switching-on; the wiring terminal comprises a wire inlet end (108 a) and a wire outlet end (108 b) which are arranged on the same side of the shell (101), and the handle (102) is arranged on the other side of the shell (101) opposite to the wiring terminal; the handle (102) comprises a driving part (1022) and a handle rod (1021) which are connected, wherein the driving part (1022) is rotatably arranged in the shell (101) and is connected with the operating mechanism (112) through a connecting rod (114).

2. The circuit breaker (100) of claim 1, wherein an unlocking mechanism (103) is further disposed within the housing (101), the circuit breaker (100) being in a pullable state by the unlocking mechanism (103) to unlock the circuit breaker (100) and the cabinet (200) until the circuit breaker (100) is pulled out of the cabinet (200); at least one operating position is arranged on the shell (101) and is used for triggering the unlocking mechanism (103).

3. The circuit breaker (100) of claim 2, wherein the unlocking mechanism (103) comprises an unlocking lever (1031) and a buckle (1030) rotatably arranged in the housing (101), one end of the buckle (1030) can extend out of the housing (101) to be matched with the cabinet (200), the buckle (1030) is driven to rotate by the unlocking lever (1031), and the buckle (1030) is retracted into the housing (101) to achieve unlocking.

4. The circuit breaker (100) of claim 3, wherein the operating position comprises an opening provided on the housing (101), one end of the unlocking lever (1031) corresponds to the opening, and the other end of the unlocking lever (1031) is provided with a first abutment surface (1031 b);

the buckle (1030) is provided with a top end extending out of the shell (101), a middle end matched with the unlocking lever (1031) and a bottom end matched with the operating mechanism (112), the middle end of the buckle (1030) is provided with a second supporting surface (1030 b) matched with the first supporting surface (1031 b), the unlocking lever (1031) is driven, and the buckle (1030) is rotated and retracted into the shell (101) through the supporting of the first supporting surface (1031 b) and the second supporting surface (1030 b).

5. The circuit breaker (100) of claim 3, wherein when the circuit breaker (100) is in a closed state, the unlocking lever (1031) drives the buckle (1030) to rotate, and after the buckle (1030) is driven to retract into the housing (101), the other end of the buckle (1030) is also abutted against the operating mechanism (112) to drive the operating mechanism (112) to open;

when the circuit breaker (100) is in a closing state, the circuit breaker (100) is installed, the cabinet (200) extrudes the buckle (1030) to enable the buckle (1030) to retract into the shell (101), and the operating mechanism (112) is driven to open.

6. The circuit breaker (100) of claim 5, wherein the bottom end of the catch (1030) has a third abutment surface (1030 c), and the third abutment surface (1030 c) is configured to abut against the latch member (1121) of the operating mechanism (112) to drive the operating mechanism (112) to act, so as to turn the operating mechanism (112) from closing to opening.

7. The circuit breaker (100) of claim 3, wherein the unlocking mechanism (103) is further configured to be interlocked with the handle (102), and when the circuit breaker (100) is in a closed state, the unlocking lever (1031) drives the buckle (1030) to rotate, so that the buckle (1030) is driven to retract into the housing (101), and the buckle (1030) can drive the handle (102) to open;

when the circuit breaker (100) is in a closing state, the circuit breaker (100) is installed, the cabinet (200) extrudes the buckle (1030) so that the buckle (1030) is retracted into the shell (101), and the buckle (1030) can drive the handle (102) to be opened.

8. The circuit breaker (100) of claim 3, wherein the unlocking mechanism (103) further comprises a reset member (1032), the reset member (1032) is rotatably disposed in the housing (101), and two ends of the reset member are respectively disposed on the unlocking lever (1031) and the buckle (1030).

9. The circuit breaker (100) of claim 1, wherein an electromagnetic release (104) and a double-gold system (113) are further disposed between the handle (102) and the operating mechanism (112), and the electromagnetic release (104) and the double-gold system (113) are disposed on two sides in the housing (101) in a direction perpendicular to the length direction of the housing (101).

10. The circuit breaker (100) of claim 9 wherein said electromagnetic release (104), said double-gold system (113), and said moving contact (1051) of said contact system (105) are in turn flexibly connected.

11. The circuit breaker (100) of claim 10, wherein a first copper bar (107) and a second copper bar (109) are further disposed in the housing (101) and perpendicular to the length direction of the housing (101), the incoming line end (108 a) is connected to the electromagnetic release (104) through the first copper bar (107), and the outgoing line end (108 b) is connected to the stationary contact (1052) of the contact system (105) through the second copper bar (109).

12. The circuit breaker (100) of claim 11 wherein an arc chute (106) is further disposed between the contact system (105) and the terminal, the opening (106 a) of the arc chute (106) being oriented toward the contact system (105);

a gas generating structure is arranged at an opening (106 a) of the arc extinguishing chamber (106), the gas generating structure comprises a first gas generating part (1061) and a second gas generating part (1062) which are oppositely arranged at two sides of the opening (106 a), and the first gas generating part (1061) and the second gas generating part (1062) are used for accelerating and guiding an electric arc generated by the contact system (105) into the arc extinguishing chamber (106);

and a third copper bar (110) is further arranged between the second copper bar (109) and the arc extinguishing chamber (106), and the second gas generating piece (1062) is used for isolating the fixed contact (1052) of the contact system (105) from the third copper bar (110).

13. The circuit breaker (100) of claim 12 wherein said arc chute (106) further comprises a screen (1063), said screen (1063) being located between said incoming end (108 a) and said outgoing end (108 b).

14. The circuit breaker (100) of any one of claims 1 to 13, wherein an end of the circuit breaker (100) at which the terminal is provided with an arc barrier (115).