A circuit breaker

Abstract

The application provides a circuit breaker, belonging to the technical field of low-voltage electrical appliances, comprising a base in the shape of a rectangle as a whole, wherein a handle, an operating mechanism, a contact system and a terminal are sequentially arranged in the length direction inside the base; the handle is connected with the operating mechanism through an inner handle, and when the handle is rotated, the contact system can be driven to realize opening or closing; wherein the terminal comprises an incoming terminal and an outgoing terminal arranged on the same side of the base, and the handle is arranged on the other side of the base opposite to the terminal; the handle comprises a driving part and a handle rod connected with each other, and the driving part is rotatably arranged in the base and connected with the inner handle. The incoming terminal and the outgoing terminal are arranged at the rear end of the circuit breaker, and the rear-in and rear-out mode effectively avoids the mispulling of the line, ensuring the safety during the process of pulling out the circuit breaker. In addition, the handle is arranged in a rotating mode to meet the use habit of the customer and improve the satisfaction and experience of the customer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a circuit breaker. BACKGROUND

[0002] The circuit breaker is a switching device that can cut off and connect a load circuit and cut off a fault circuit, which can effectively prevent the expansion of accidents and ensure safe operation. When operating the circuit breaker, the opening and closing of the circuit breaker are completed by driving the handle. In the current 1U circuit breaker, the opening and closing are completed by a button-type handle driving system, which cannot meet the needs of customers; and the system is connected from the rear end of the circuit breaker and connected from the front end of the circuit breaker, which is easy to cause the mispulling of the line. SUMMARY

[0003] The purpose of the present application is to provide a circuit breaker, which sets the incoming line end and the outgoing line end on the same side of the circuit breaker, effectively avoids the mispulling of the line, and also uses a dial handle to meet the needs of customers.

[0004] The embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a circuit breaker, which includes a base in the shape of a rectangle as a whole, a dial handle, an operating mechanism, a contact system and a terminal are sequentially arranged in the length direction in the base, the handle is connected with the operating mechanism through an inner handle, and the handle can drive the contact system to realize opening or closing when the handle is rotated; wherein the terminal includes an incoming line end and an outgoing line end arranged on the same side of the base, and the handle is arranged on the other side of the base opposite to the terminal; the handle includes a driving part and a handle rod connected with each other, and the driving part is rotatably arranged in the base and connected with the inner handle.

[0006] Optionally, an unlocking device is further arranged in the base, the unlocking device is used for unlocking the circuit breaker and a cabinet, 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 base, which is used for triggering the unlocking device.

[0007] Optionally, the unlocking device includes an unlocking rod and a buckle arranged in the base and connected with the unlocking rod, one end of the buckle can extend out of the base and be used for cooperating with the cabinet, and when the circuit breaker is in an open state, the buckle is driven by the unlocking rod to move in the extending direction, so that the buckle is retracted into the base to realize unlocking.

[0008] Optionally, the operation position comprises an opening arranged on the base, one end of the unlocking rod corresponds to the opening, the other end of the unlocking rod is provided with a mounting hole, one end of the buckle is provided with a rotating shaft, the rotating shaft is arranged in the mounting hole, so that the buckle and the unlocking rod are linked.

[0009] Optionally, the opening is provided with a first boss along the length direction of the base, and a second boss along a direction perpendicular to the length direction, and the end of the unlocking rod corresponding to the opening is respectively provided with a first limiting surface matched with the first boss and a second limiting surface matched with the second boss, so that the unlocking rod moves along the direction of the first boss through the first limiting surface and moves along the direction of the second boss through the second limiting surface.

[0010] Optionally, the unlocking device further comprises a locking piece, one end of the locking piece is rotationally arranged in the base, the locking piece passes through the buckle to have a locked state with the buckle, and the other end of the locking piece is arranged in the driving part of the handle; the locking piece is rotated by operating the handle to make the locking piece and the buckle have an unlocked state, so that the buckle is driven by the unlocking rod to retract into the base to achieve unlocking when the circuit breaker is in an open state, and the unlocking device is locked when the circuit breaker is in a closed state.

[0011] Optionally, the buckle is provided with a through hole for the locking piece to pass through; the locking piece has a protrusion on the side wall in the buckle, and the hole wall of the through hole is provided with a locking surface matched with the protrusion, and the locking piece and the buckle have a locked state by abutting of the protrusion and the locking surface.

[0012] Optionally, the unlocking device further comprises a reset piece arranged in the base, and two ends of the reset piece are connected with the base and the buckle respectively.

[0013] Optionally, an electromagnetic release is arranged above the inner handle, and a double-gold system is further arranged on the side away from the handle of the electromagnetic release, and the double-gold system is connected with the lock catch of the operation mechanism through a traction frame; the end of the double-gold piece of the double-gold system close to the electromagnetic release has a U-shaped groove, and one end of the traction frame is arranged in the U-shaped groove, and the other end is connected with the lock catch.

[0014] Optionally, the base is further provided with a first copper bar and a second copper bar opposite to each other and perpendicular to the length direction of the base, the incoming wire end is connected with the electromagnetic release through the first copper bar, and the outgoing wire end is connected with the static contact of the contact system through the second copper bar.

[0015] Optionally, an arc-extinguishing chamber is further arranged between the contact system and the terminal, and an opening of the arc-extinguishing chamber faces the contact system; a gas generating structure is arranged at the opening of the arc-extinguishing chamber, the gas generating structure comprises a first gas generating member and a second gas generating member arranged oppositely on both sides of the opening, and the first gas generating member and the second gas generating member are used for accelerating and guiding the arc generated by the contact system into the arc-extinguishing chamber; a third copper bar is further arranged between the second copper bar and the arc-extinguishing chamber, and the second gas generating member is insulated from the stationary contact of the contact system and the third copper bar.

[0016] Optionally, the end of the circuit breaker provided with the terminal is provided with an arc isolation plate.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The circuit breaker provided by the embodiments of the present application comprises a long rectangular base, a handle, an operating mechanism, a contact system and a terminal are sequentially arranged in the length direction of the base, the handle adopts a dialing type structure, and linkage is realized through the inner handle and the operating mechanism, the dialing handle can sequentially drive the inner handle and the operating mechanism to act, and then the operating mechanism drives the contact system to complete opening and closing. The terminal and the handle are arranged on opposite sides of the base, and the terminal comprises an incoming line end and an outgoing line end, and the incoming line end and the outgoing line end are arranged at the rear end of the circuit breaker. This rear-in rear-out mode effectively avoids the mispulling of the line and ensures the safety during the process of pulling out the circuit breaker. In addition, the dialing handle meets the use habit of the customer and improves the satisfaction and experience of the customer. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The circuit breaker provided by the embodiments of the present application is in a closed state;

[0021] Figure 2 The circuit breaker provided by the embodiments of the present application is in a closed state;

[0022] Figure 3 The circuit breaker provided by the embodiments of the present application is in a closed state;

[0023] Figure 4 The circuit breaker provided by the embodiments of the present application is in a closed state;

[0024] Figure 5A circuit breaker structure schematic diagram provided by the embodiment of the present application;

[0025] Figure 6 A circuit breaker and cabinet cooperation schematic diagram provided by the embodiment of the present application;

[0026] Figure 7 A circuit breaker partial structure schematic diagram three provided by the embodiment of the present application;

[0027] Figure 8 A buckle structure schematic diagram one provided by the embodiment of the present application;

[0028] Figure 9 A buckle structure schematic diagram two provided by the embodiment of the present application;

[0029] Figure 10 A lock structure schematic diagram provided by the embodiment of the present application;

[0030] Figure 11 A circuit breaker arc extinguishing chamber structure schematic diagram provided by the embodiment of the present application.

[0031] Icon: 10-circuit breaker; 10a-base; 10a1-first boss; 10a2-second boss; 100-handle; 100a-handle rod; 100b-driving part; 101a-unlocking rod; 101a1-first limit surface; 101a2-second limit surface; 101b-buckle; 101b1-locking end; 101b2-through hole; 101b3-locking surface; 101b4-inclined surface; 101c-lock; 101c1-protrusion; 102-electromagnetic release; 102a-electromagnetic release connecting plate; 103-double gold sheet; 103a-U-shaped groove; 104-first copper bar; 105-arc extinguishing chamber; 105a-opening; 106a-wire inlet end; 106b-wire outlet end; 107-arc separation plate; 108-second copper bar; 109-third copper bar; 110a-first gas generating part; 110b-second gas generating part; 111-contact system; 111a-moving contact; 111b-stationary contact; 111c-stationary contact plate; 112-operating mechanism; 113a-first connecting rod; 113b-second connecting rod; 114-inner handle; 114a-square hole; 115-pulling frame; 20-cabinet. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application, but merely represents selected embodiments of the application. Based upon these embodiments of the application, all other embodiments that would be obvious to one of ordinary skill in the art based upon the embodiments disclosed herein are within the scope of the application.

[0034] It should be noted that like numerals and letters refer to like items throughout the drawings, and thus once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0035] The current 1U circuit breaker, which is driven by a button type handle, cannot meet some customer needs, and the system is connected from the rear end of the circuit breaker and connected from the front end of the circuit breaker, which is easy to cause the line to be pulled out.

[0036] To solve the above problems, on the basis of this, please refer to Figure 1 The circuit breaker 10 provided by the embodiments of the application comprises a base 10a in the shape of a rectangle as a whole, a handle 100, an operating mechanism 112, a contact system 111 and a terminal are sequentially arranged in the length direction of the base 10a, the handle 100 is connected with the operating mechanism 112 through an inner handle 114, and when the handle 100 rotates, the handle 100 can drive the contact system 111 to realize opening or closing; wherein the terminal comprises a line-in terminal 106a and a line-out terminal 106b arranged on the same side of the base 10a, and the handle 100 is arranged on the other side of the base 10a opposite to the terminal; the handle 100 comprises a driving part 100b and a handle rod 100a connected with each other, and the driving part 100b is rotatably arranged in the base 10a and connected with the inner handle 114.

[0037] The base 10a is in the shape of a rectangle as a whole, the handle 100, the operating mechanism 112, the contact system 111 and the terminal are sequentially arranged in the length direction of the base 10a, and the space of the base 10a is effectively utilized, so that the overall layout of the circuit breaker 10 is reasonable. For example, the operating mechanism 112 in the application is located at the center of the front end of the base 10a, and in addition, the operating mechanism 112 can also be located above or below the front end of the base 10a, and the application does not make specific limitation on this.

[0038] The handle 100 is located at the front end and the lower position of the base 10a, as shown in Figure 2As shown, the handle 100 comprises a connected driving part 100b and handle rod 100a, the driving part 100b is rotationally arranged in the base 10a, and an inner handle 114 is also arranged in the base 10a, the driving part 100b is connected with the inner handle 114 through a first connecting rod 113a, and the inner handle 114 is connected with the operating mechanism 112 through a second connecting rod 113b, so as to realize sequential linkage. For example, mounting holes are arranged on the peripheral walls of the driving part 100b and the inner handle 114 respectively, and the two ends of the first connecting rod 113a are connected through the mounting holes, so that the driving part 100b is connected with the inner handle 114 through the first connecting rod 113a. Similarly, mounting holes for connecting the two ends of the second connecting rod 113b are also arranged on the inner handle 114 and the operating mechanism 112 respectively, so that the inner handle 114 is connected with the operating mechanism 112 through the second connecting rod 113b. The first connecting rod 113a and the second connecting rod 113b can both be U-shaped connecting rods.

[0039] Further, the handle rod 100a extends out of the base 10a for operation. For example, the handle rod 100a in the present application is a plate-shaped structure. The plate-shaped handle rod 100a has a large surface area, and feels good and stable when held by a customer. In addition, anti-slip lines are arranged on the surface of the handle rod 100a to facilitate operation. The handle 100 adopts a dialing type, which drives the driving part 100b to rotate by dialing the handle rod 100a, and then drives the inner handle 114 and the operating mechanism 112 connected with the driving part 100b to act sequentially, so that the contact system 111 completes opening and closing. The handle 100 in the present application is driven in a dialing manner, which meets the use habits of customers and improves customer satisfaction.

[0040] As for the inner handle 114, Figure 3 As shown, a square hole 114a extending out of the base 10a is arranged at the center of the inner handle 114. The square hole 114a can be used to accommodate a square shaft, so that the operating mechanism 112 can be actuated by directly operating the inner handle 114 to complete opening and closing.

[0041] The rear end of the base 10a is provided with a terminal, which comprises an inlet terminal 106a and an outlet terminal 106b arranged oppositely. The inlet terminal 106a and the outlet terminal 106b are located on the same side of the base 10a and are respectively located at the top and the bottom of the base 10a. By arranging the inlet terminal 106a and the outlet terminal 106b on the same side of the base 10a, the rear inlet and the rear outlet are connected in a rear-in rear-out manner, which can effectively avoid disconnection of the line and ensure safety during disconnection of the circuit breaker 10.

[0042] The circuit breaker 10 provided by the embodiments of the present application is a rectangle as a whole, and the handle 100, the operating mechanism 112, the contact system 111 and the wiring terminal are sequentially arranged in the length direction in the base 10a. The handle 100 adopts a dialing type structure, and is linked with the operating mechanism 112 through the inner handle 114. Dialing the handle 100 can sequentially drive the inner handle 114 and the operating mechanism 112 to act, and then drive the contact 111a system to complete the opening and closing through the operating mechanism 112. The wiring terminal and the handle 100 are arranged on opposite sides of the base 10a, wherein the wiring terminal includes the incoming line end 106a and the outgoing line end 106b. The incoming line end 106a and the outgoing line end 106b are arranged at the rear end of the circuit breaker 10. This rear-in and rear-out mode effectively avoids the mispulling of the line, and ensures the safety during the pulling of the circuit breaker 10. In addition, the dialing handle 100 meets the use habit of the customer, and improves the satisfaction and experience of the customer.

[0043] The base 10a is further provided with an unlocking device. The unlocking device is used for unlocking the circuit breaker 10 and the cabinet 20, so that the circuit breaker 10 is in a pullable state until the circuit breaker 10 is pulled out of the cabinet 20. At least one operation position is arranged on the base 10a. The operation position is used for making a tool extend into the base 10a to cooperate with the unlocking device, and trigger the unlocking device to complete the unlocking.

[0044] For example, the operation position on the base 10a in the present application is an opening arranged on the base 10a. The opening is located at one end close to the handle 100, and is located above the handle 100.

[0045] Specifically, as shown in Figure 4 The unlocking device includes the unlocking rod 101a and the buckle 101b arranged in the base 10a and linked with the unlocking rod 101a. One end of the buckle 101b can extend out of the base 10a to cooperate with the cabinet 20. When the circuit breaker 10 is in the opening state, the buckle 101b is driven to move in the extending direction by the unlocking rod 101a, so as to retract into the base 10a to realize the unlocking.

[0046] The unlocking lever 101a is located at the top of the front end of the base 10a and extends obliquely out of the opening of the base 10a for matching operation. One end of the unlocking lever 101a extends out of the base 10a corresponding to the opening, and the other end of the unlocking lever 101a extends into the base 10a for matching linkage with the buckle 101b. The buckle 101b is vertically arranged in the base 10a. One end of the buckle 101b is connected with the unlocking lever 101a, and the other end (locking end 101b1) extends out of the base 10a and extends into the cabinet 20 to lock the circuit breaker 10 and the cabinet 20. When the buckle 101b is connected with the unlocking lever 101a, the connecting end of the unlocking lever 101a is provided with a mounting hole, and the end of the buckle 101b is provided with a rotating shaft arranged in the mounting hole to link the buckle 101b and the unlocking lever 101a.

[0047] When the circuit breaker 10 is in the tripping state, as shown in Figure 5 and Figure 6 , the unlocking lever 101a can be pulled to drive the buckle 101b to move vertically along the height direction of the base 10a, so that the buckle 101b is retracted into the base 10a to release the locking state with the cabinet 20 and achieve unlocking. At this time, the circuit breaker 10 is in a pullable state. The unlocking lever 101a can be continuously pulled to pull the circuit breaker 10 out of the cabinet 20.

[0048] Among them, as shown in Figure 7 , the opening is provided with a first boss 10a1 along the length direction of the base 10a and a second boss 10a2 along the direction perpendicular to the length direction. The end of the unlocking lever 101a corresponding to the opening is respectively provided with a first limiting surface 101a1 matched with the first boss 10a1 and a second limiting surface 101a2 matched with the second boss 10a2, so that the unlocking lever 101a moves along the direction of the first boss 10a1 through the first limiting surface 101a1 and moves along the direction of the second boss 10a2 through the second limiting surface 101a2.

[0049] The operation end of the unlocking lever 101a is provided with a first limiting surface 101a1 along the length direction of the base 10a, and the opening is provided with a first boss 10a1 along the length direction, so that when the unlocking lever 101a is pulled, the unlocking lever 101a can move along the direction of the first boss 10a1 through the first limiting surface 101a1; the operation end of the unlocking lever 101a is provided with a second limiting surface 101a2 along the vertical direction (the height direction of the base 10a), and the opening is provided with a second boss 10a2 along the vertical direction, so that when the unlocking lever 101a is pulled, the unlocking lever 101a can move along the direction of the second boss 10a2 through the second limiting surface 101a2; in this way, the movement of the unlocking lever 101a along the length direction of the base 10a is limited by the first boss 10a1, and the movement of the unlocking lever 101a along the vertical direction of the base 10a is limited by the second boss 10a2, so as to ensure that the movement direction of the unlocking lever 101a is always in the axial direction of the unlocking lever 101a when the unlocking lever 101a moves, avoiding the movement direction of the unlocking lever 101a deviating from the axial direction and causing the unlocking lever 101a to be stuck with the base 10a and unable to drive the buckle 101b to move.

[0050] In order to ensure the safety of operating the circuit breaker 10, the unlocking device can only be operated when the circuit breaker 10 is in the off state, so the application also provides a locking piece 101c to lock the unlocking device when the circuit breaker 10 is closed, so that the unlocking device cannot be operated. Specifically, the unlocking device further comprises a locking piece 101c, one end of the locking piece 101c is rotatably arranged in the base 10a, the locking piece 101c passes through the buckle 101b to have a locked state with the buckle 101b, and the other end of the locking piece 101c is arranged in the driving part 100b of the handle 100; the locking piece 101c is rotated by operating the handle 100 to unlock the buckle 101b, so that the buckle 101b is retracted into the base 10a to achieve unlocking when the circuit breaker 10 is in the off state, and the unlocking device is locked when the circuit breaker 10 is in the closed state.

[0051] The locking piece 101c is transversely arranged in the base 10a along the length direction of the base 10a, one end of the locking piece 101c is rotatably connected to the base 10a through a rotating shaft, the other end of the locking piece 101c extends into the hole of the driving part 100b and transversely passes through the buckle 101b, the buckle 101b is provided with a through hole 101b2 for the locking piece 101c to pass through; the locking piece 101c has a protrusion 101c1 on the side wall in the buckle 101b, and the hole wall of the through hole 101b2 is provided with a locking surface 101b3 matched with the protrusion 101c1, the protrusion 101c1 and the locking surface 101b3 are abutted to make the locking piece 101c and the buckle 101b have a locked state.

[0052] As Figure 8 and Figure 9As shown, the upper hole wall of the through hole 101b2 of the buckle 101b is connected by a plane and an inclined surface 101b4, the plane is arranged along the length direction, and the inclined surface 101b4 is inclined towards the handle 100, and the plane is the locking surface 101b3, when the circuit breaker 10 is in the closed state, Figure 10 The protrusion 101c1 of the locking piece 101c and the locking surface 101b3 are in abutment, so that the buckle 101b cannot act, so as to lock the unlocking device, at this time, pulling the unlocking rod 101a cannot drive the buckle 101b to act, and the unlocking of the circuit breaker 10 and the cabinet 20 cannot be completed. When the handle 100 is driven to open, the handle 100 rotates to drive the locking piece 101c to rotate clockwise, at this time, the protrusion 101c1 of the locking piece 101c is out of abutment with the locking surface 101b3, and when the unlocking rod 101a is pulled, the buckle 101b moves to retract into the base 10a, and the unlocking of the circuit breaker 10 and the cabinet 20 is completed.

[0053] After the unlocking is completed, the unlocking device can also be reset by the reset piece 101d, and the unlocking device further comprises a reset piece 101d arranged in the base 10a, and the two ends of the reset piece 101d are connected with the base 10a and the buckle 101b respectively. After the pulling force of the unlocking rod 101a disappears, the reset piece 101d makes the buckle 101b return to the initial state, and the reset of the unlocking device is completed. The reset piece 101d can be a reset spring, in addition to the reset spring, other resettable structures such as rubber bands can also be used as the reset piece 101d to realize the reset function, and the reset piece 101d is not limited to the reset spring.

[0054] On the other hand, an electromagnetic release 102 is arranged above the inner handle 114, and the electromagnetic release 102 is arranged at the front end of the base 10a, and the electromagnetic release 102 is a solenoid release. The circuit breaker 10 of the present application adopts a rear-in rear-out wiring mode, and the front end of the circuit breaker 10 does not need to be provided with a plug-in board, so that a larger space is provided for placing a solenoid electromagnetic release 102 with a shorter response time, which is beneficial to improve the breaking capacity.

[0055] The side of the electromagnetic release 102 away from the handle 100 is further provided with a double-metal system, and the double-metal system is connected with the lock catch of the operating mechanism 112 through a traction frame 115; the end of the double-metal system close to the electromagnetic release 102 has a U-shaped groove 103a, and one end of the traction frame 115 is arranged in the U-shaped groove 103a, and the other end is connected with the lock catch.

[0056] The electromagnetic release 102 is used to make the circuit breaker 10 open when the circuit breaker 10 is short-circuited, and the double-metal system is used to make the circuit breaker 10 open when the circuit breaker 10 is overloaded, both of which play a protective role for the circuit breaker 10, and the principle is consistent with the existing structure, which will not be described here.

[0057] The double-metal system comprises a double-metal piece 103, like Figure 3As shown, the front end of the double gold sheet 103 is bent into a U-shaped groove 103a structure, one end of the traction frame 115 is arranged in the U-shaped groove 103a for limiting, and the other end is connected with the lock buckle. Compared with the prior art of positioning the traction frame 115 on the base 10a, the space occupied by positioning the traction frame 115 on the base 10a can be saved, and the space in the base 10a is saved.

[0058] The first copper bar 104 and the second copper bar 108 are also arranged in the base 10a and are perpendicular to the length direction of the base 10a. The incoming line end 106a is connected with the electromagnetic release 102 through the first copper bar 104, and the outgoing line end 106b is connected with the static contact 111b of the contact system 111 through the second copper bar 108.

[0059] As shown in the drawings, Figure 11 The arc chamber 105 is also arranged between the contact system 111 and the terminal, and the opening 105a of the arc chamber 105 faces the contact system 111. The opening 105a of the arc chamber 105 is provided with a gas generating structure, which includes a first gas generating member 110a and a second gas generating member 110b arranged opposite to each other on both sides of the opening 105a. The first gas generating member 110a and the second gas generating member 110b are used to accelerate the arc generated by the contact system 111 into the arc chamber 105. The second copper bar 108 and the arc chamber 105 are also provided with a third copper bar 109, and the second gas generating member 110b isolates the static contact 111b of the contact system 111 and the third copper bar 109.

[0060] The arc generated by the contact system 111 is introduced into the arc chamber 105 for arc extinction. The opening 105a of the arc chamber 105 is provided with a first gas generating member 110a and a second gas generating member 110b arranged opposite to each other on both sides of the opening 105a. The first gas generating member 110a and the second gas generating member 110b are arranged in parallel, and an arc introduction channel is formed between the first gas generating member 110a and the second gas generating member 110b. The arc introduction channel is in communication with the opening 105a of the arc chamber 105, so as to accelerate the arc generated by the contact system 111 into the arc chamber 105.

[0061] As shown in the drawings, Figure 2 And Figure 3 The second gas generating member 110b is arranged on both sides of the third copper bar 109 and the static contact 111b along the height direction of the base 10a. The side of the second gas generating member 110b close to the static contact 111b is a C-shaped cross section, forming a sealed cavity with the base 10a, and the static contact 111b is arranged in the sealed cavity. The second gas generating member 110b isolates the static contact 111b from the third copper bar 109, and has an insulation protection effect.

[0062] Specifically, the third copper bar 109 is above the arc extinguishing chamber 105, and the third copper bar 109 can introduce the arc into the arc extinguishing chamber 105. The end of the third copper bar 109 away from the arc extinguishing chamber 105 extends into the arc introduction channel between the first gas production member 110a and the second gas production member 110b, and the top of the end of the third copper bar 109 away from the arc extinguishing chamber 105 is close to the moving contact 111a but does not contact the moving contact 111a or the static contact plate 111c. The current direction of the main circuit is: the incoming line end 106a-the first copper bar 104-the double gold system-the electromagnetic release 102-the electromagnetic release connecting plate 102a-the moving contact 111a, the moving contact 111a conducts the current to the static contact 111b after contacting the static contact 111b, the static contact 111b conducts the current to the second copper bar 108 through the static contact plate 111c, and the current flows out of the outgoing line end 106b, wherein the soft wire is uniformly used for connection and conduction at each disconnection.

[0063] In addition, the end of the terminal of the circuit breaker 10 is provided with the arc separation plate 107, the arc separation plate 107 extends out of the base 10a, and the arc separation plate 107 is used to increase the creepage distance and can prevent the terminal from being punctured.

[0064] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circuit breaker (10), characterized in that, The device includes a rectangular base (10a), within which a toggle handle (100), an operating mechanism (112), a contact system (111), and terminals are sequentially arranged along the length direction. The handle (100) is linked to the operating mechanism (112) via an inner handle (114). When the handle (100) is rotated, it can drive the contact system (111) to open or close the circuit breaker. The terminals include an inlet terminal (106a) and an outlet terminal (106b) located on the same side of the base (10a). The handle (100) is located on the opposite side of the base (10a) from the terminals. The handle (100) includes a drive unit (100b) and a handle rod (100a) connected together. The drive unit (100b) is rotatably disposed inside the base (10a) and connected to the inner handle (114). The base (10a) is also provided with an unlocking device, which includes an unlocking rod (101a) and a buckle (101b) disposed in the base (10a) and linked with the unlocking rod (101a). The unlocking device further includes a locking member (101c), one end of which is rotatably disposed within the base (10a). The locking member (101c) passes through the latch (101b) to be locked with the latch (101b). The other end of the locking member (101c) is disposed within the drive part (100b) of the handle (100). By operating the handle (100), the locking member (101c) is pushed to rotate, thereby releasing the locking member (101c) and the latch (101b) from the locked state. When the circuit breaker (10) is in the open state, the latch (101b) is driven to retract into the base (10a) by the unlocking rod (101a) to achieve unlocking. When the circuit breaker (10) is in the closed state, the unlocking device is locked.

2. The circuit breaker (10) according to claim 1, characterized in that, The unlocking device is used to unlock the circuit breaker (10) and the cabinet (20), so that the circuit breaker (10) is in a pullable state until the circuit breaker (10) is pulled out of the cabinet (20); at least one operating position is provided on the base (10a) for triggering the unlocking device.

3. The circuit breaker (10) according to claim 2, characterized in that, One end of the latch (101b) can extend out of the base (10a) to cooperate with the cabinet (20). When the circuit breaker (10) is in the open state, the latch (101b) is driven to move in the extension direction by the unlocking rod (101a) so that the latch (101b) retracts into the base (10a) to unlock.

4. The circuit breaker (10) according to claim 3, characterized in that, The operating position includes an opening on the base (10a), one end of the unlocking rod (101a) corresponds to the opening, the other end of the unlocking rod (101a) is provided with a mounting hole, one end of the buckle (101b) is provided with a rotating shaft, the rotating shaft is provided in the mounting hole, so that the buckle (101b) and the unlocking rod (101a) are linked together.

5. The circuit breaker (10) according to claim 4, characterized in that, A first boss (10a1) is provided at the opening along the length direction of the base (10a), and a second boss (10a2) is provided perpendicular to the length direction. The unlocking rod (101a) and the opening are respectively provided with a first limiting surface (101a1) that cooperates with the first boss (10a1) and a second limiting surface (101a2) that cooperates with the second boss (10a2), so that the unlocking rod (101a) can move along the direction of the first boss (10a1) through the first limiting surface (101a1) and move along the direction of the second boss (10a2) through the second limiting surface (101a2).

6. The circuit breaker (10) according to claim 1, characterized in that, The buckle (101b) is provided with a through hole (101b2) to allow the locking member (101c) to pass through; the locking member (101c) has a protrusion (101c1) on the side wall inside the buckle (101b), and the hole wall of the through hole (101b2) is provided with a locking surface (101b3) that cooperates with the protrusion (101c1). Through the abutment of the protrusion (101c1) and the locking surface (101b3), the locking member (101c) and the buckle (101b) are in a locked state.

7. The circuit breaker (10) according to claim 3, characterized in that, The unlocking device also includes a reset member (101d) disposed in the base (10a), the two ends of which are connected to the base (10a) and the buckle (101b) respectively.

8. The circuit breaker (10) according to claim 1, characterized in that, An electromagnetic trip device (102) is provided above the inner handle (114). A double-metal system is also provided on the side of the electromagnetic trip device (102) away from the handle (100). The double-metal system is connected to the operating mechanism (112) by a traction frame (115). The end of the double gold plate (103) of the double gold system near the electromagnetic trip unit (102) has a U-shaped groove (103a), one end of the traction frame (115) is disposed in the U-shaped groove (103a), and the other end is connected to the latch.

9. The circuit breaker (10) according to claim 8, characterized in that, The base (10a) is also provided with a first copper busbar (104) and a second copper busbar (108) perpendicular to the length direction of the base (10a). The inlet terminal (106a) is connected to the electromagnetic trip unit (102) through the first copper busbar (104), and the outlet terminal (106b) is connected to the stationary contact (111b) of the contact system (111) through the second copper busbar (108).

10. The circuit breaker (10) according to claim 9, characterized in that, An arc-extinguishing chamber (105) is also provided between the contact system (111) and the terminal block, with the opening of the arc-extinguishing chamber (105) facing the contact system (111). The arc-extinguishing chamber (105) is provided with a gas-generating structure at its opening. The gas-generating structure includes a first gas-generating element (110a) and a second gas-generating element (110b) disposed opposite to each other on both sides of the opening. The first gas-generating element (110a) and the second gas-generating element (110b) are used to accelerate the electric arc generated by the contact system (111) into the arc-extinguishing chamber (105). A third copper busbar (109) is also provided between the second copper busbar (108) and the arc-extinguishing chamber (105), and the second gas-generating component (110b) isolates the stationary contact (111b) of the contact system (111) from the third copper busbar (109).

11. The circuit breaker (10) according to any one of claims 1 to 10, characterized in that, The circuit breaker (10) has an arc-blocking plate (107) at the end of the terminal block.

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