circuit breaker

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to a circuit breaker which comprises a shell, a first circuit and a second circuit arranged in the shell respectively, and an operating member slidingly arranged in the shell; the first circuit comprises a first operating and contact system which comprises a first operating mechanism and a first moving contact head connected in drive, and a first static contact head matched with the first moving contact head; the second circuit comprises a second operating and contact system which comprises a second operating mechanism and a second moving contact head connected in drive, and a second static contact head matched with the second moving contact head; the operating member, the first operating and contact system and the second operating and contact system are sequentially arranged in one direction in the shell; the first operating mechanism is connected in drive with the second operating mechanism through a linkage; the circuit breaker has reasonable internal layout, good insulation and simple transmission paths of the two groups of operating mechanisms.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] Due to the limitations of their application scenarios, plug-in circuit breakers have different requirements for their internal structure design and layout compared to traditional circuit breakers (such as molded case circuit breakers and frame circuit breakers).

[0003] Existing plug-in circuit breakers, especially those with two circuit structures (e.g., 1P+N type circuit breakers, with one L-pole circuit and one N-pole circuit), have the following shortcomings:

[0004] 1. The contact systems and operating mechanisms of the two circuit structures are generally arranged in a stacked manner along the thickness direction of the circuit breaker housing. Firstly, the two sets of contact systems are close to each other and have high requirements for insulation performance. Secondly, the stacked arrangement of the two sets of contact systems increases the thickness specification of the circuit breaker.

[0005] 2. In order to achieve synchronous opening or closing of two circuit structures, the two circuit structures share an operating mechanism or have two independent operating mechanisms. The operating mechanism has a complex structure and occupies a large space.

[0006] 3. The N-pole circuit lacks an arc-starting structure, or the existing arc-starting structure is complex. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit breaker with a reasonable internal layout and good insulation, and a simple transmission path for the two sets of operating mechanisms.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A circuit breaker includes a housing, a first circuit and a second circuit respectively disposed within the housing, and an operating element slidably inserted within the housing; the first circuit includes a first operating and contact system, the first operating and contact system including a first operating mechanism and a first moving contact driven together, and a first stationary contact cooperating with the first moving contact; the second circuit includes a second operating and contact system, the second operating and contact system including a second operating mechanism and a second moving contact driven together, and a second stationary contact cooperating with the second moving contact; the operating element, the first operating and contact system, and the second operating and contact system are sequentially arranged along one direction within the housing; the first operating mechanism is drivenly connected to the second operating mechanism via a linkage.

[0010] Preferably, the first operating mechanism includes a first lever rotatably mounted on the housing and driven by a first moving contact, and the second operating mechanism includes a second lever rotatably mounted on the housing and driven by a second moving contact. The first lever is driven by the second lever through a linkage, and the first lever and the second lever rotate synchronously.

[0011] Preferably, the first lever and the second lever are rotatably connected to both ends of the linkage.

[0012] Preferably, the rotation directions of the first lever and the second lever are opposite.

[0013] Preferably, the linkage includes a first linkage transmission part, a linkage transmission plate, and a second linkage transmission part connected in sequence; the first lever includes a first lever connecting part, which is rotatably connected to the first linkage transmission part, and the rotation axes of the first lever connecting part and the first linkage transmission part are parallel and spaced apart from the rotation axis of the first lever; the second lever includes a second lever connecting part, which is rotatably connected to the second linkage transmission part, and the rotation axes of the second lever connecting part and the second linkage transmission part are parallel and spaced apart from the rotation axis of the second lever; the first linkage transmission part and the second linkage transmission part are located on the same side of the linkage transmission plate, and the two ends of the linkage transmission plate are respectively stacked with the first lever and the second lever along the thickness direction of the shell.

[0014] Preferably, the operating element is a button that is slidably inserted into the housing, and it is driven and connected to the first operating mechanism through a first connecting rod.

[0015] Preferably, the first operating mechanism includes a handle, a first lever, a handle reset component, a second connecting rod, a lever reset component, a locking component, a tripping component, and a tripping reset component. The handle and the first lever are rotatably mounted on the housing. The handle is connected to the button via the first connecting rod and to the locking component via the second connecting rod. The handle reset component applies a force to the handle, causing it to tend to rotate towards the open position. The locking component and the tripping component are rotatably mounted on the first lever and are engaged. The lever reset component applies a force to the first lever, causing it to drive the first moving contact to disconnect from the first stationary contact. The tripping reset component applies a force to the tripping component, causing it to maintain an engagement with the locking component.

[0016] Preferably, the handle reset component is a handle reset torsion spring, which is coaxially arranged with the handle component, and its two ends cooperate with the housing and the handle component respectively; the lever reset component is a lever compression spring, which is cooperating with the housing and the first lever respectively; the jump buckle reset component is a jump buckle reset torsion spring, which is coaxially arranged with the jump buckle component, and its two ends cooperate with the jump buckle component and the first lever respectively.

[0017] Preferably, the circuit breaker further includes a short-circuit protection mechanism and an overload protection mechanism that are respectively driven by the trip fastener.

[0018] Preferably, the second operating mechanism further includes a second moving contact spring. The second moving contact is disposed on the second lever and rotates synchronously with it and can rotate relative to the second lever. One end of the second moving contact spring is fixed, and the other end is connected to the second moving contact. When the second moving contact and the second stationary contact are closed, the second moving contact spring causes the second moving contact to press against the second stationary contact. After the second moving contact and the second stationary contact are separated, the second moving contact spring drives the second moving contact to swing away from the second stationary contact.

[0019] The circuit breaker of the present invention has a first operating and contact system of the first circuit and a second operating and contact system of the second circuit arranged along the length of the housing. Compared with the existing circuit breaker, the thickness specification of the circuit breaker is reduced, and the insulation distance and creepage clearance of the first circuit and the second circuit are increased, thereby improving the insulation performance of the circuit breaker. The transmission path and structure of the operating element, the first operating mechanism and the second operating mechanism are simple, ensuring the reliability and synchronization of the operation of the first operating mechanism and the second operating mechanism, and saving internal space of the circuit breaker. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the housing structure of the circuit breaker of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the first operation and contact system and the second operation and contact system of the present invention;

[0023] Figure 4 This is a schematic diagram showing the connection between the first lever, the linkage, and the second lever of the present invention. Detailed Implementation

[0024] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

[0025] like Figure 1-4 The diagram shows an embodiment of the circuit breaker of the present invention.

[0026] like Figure 1-4As shown, the circuit breaker of this embodiment includes a housing 15 and a first circuit and a second circuit respectively disposed within the housing 15; at least one of the two ends of the housing 15 in the length direction is provided with a circuit breaker terminal; the first circuit includes a first operating and contact system 6, the first operating and contact system 6 includes a first operating mechanism and a first moving contact 6-8 driven and connected, and a first stationary contact 6-9 cooperating with the first moving contact 6-8; the second circuit includes a second operating and contact system 11, the second operating and contact system 11 includes a second operating mechanism and a second moving contact 11-1 driven and connected, and a second stationary contact 11-3 cooperating with the second moving contact 11-1; the first operating and contact system 6 and the second operating and contact system 11 are spaced apart along the length direction of the housing 15 and located between the two ends of the housing 15 in the length direction.

[0027] like Figure 2-3 As shown, the first moving contact 6-8 and the first stationary contact 6-9 form the first contact system, and the second moving contact 11-1 and the second stationary contact 11-3 form the second contact system.

[0028] like Figure 1-2 As shown, the input and output terminals of the first and second circuits are both circuit breaker terminals. The input terminals of the first and second circuits are circuit breaker input terminals, and the output terminals of the first and second circuits are circuit breaker output terminals. The input terminals of the first and second circuits are respectively the first input terminal 9 and the second input terminal 10. The first input terminal 9 and the second input terminal 10 are located at one end of the length direction of the housing 15 and are arranged side by side at intervals along the width direction of the housing 15. The output terminals of the first and second circuits are respectively the first output terminal 14a and the second output terminal 14b. The first output terminal 14a and the second output terminal 14b are located at the other end of the length direction of the housing 15 and are arranged side by side at intervals along the thickness direction of the housing 15.

[0029] In another embodiment, only one end of the housing 15 along its length is provided with a circuit breaker terminal; that is, both the circuit breaker inlet and the short-circuit outlet are located at one end of the housing 15 along its length.

[0030] The circuit breaker in this embodiment is... Figure 1-2 The vertical direction is the length direction of the shell 15, with Figure 1-2 The left and right directions are the width directions of the shell 15, with Figure 1-2 The thickness direction of the shell 15 is from the side facing the reader to the side away from the reader.

[0031] In this embodiment, the circuit breaker is preferably a 1P+N type circuit breaker, the first circuit is preferably an L-pole circuit, and the second circuit is preferably an N-pole circuit. Of course, in other embodiments, both the first circuit and the second circuit can be L-pole circuits.

[0032] The circuit breaker of the present invention has a first operating and contact system 6 of the first circuit and a second operating and contact system 11 of the second circuit arranged at intervals along the length of the housing 15. Compared with the existing circuit breaker, the thickness specification of the circuit breaker is reduced, and the insulation distance and creepage clearance of the first and second circuits are increased, which improves the insulation between the circuit breaker poles and simplifies the internal wiring process of the circuit breaker. Both the first operating and contact system of the first circuit and the second operating and contact system of the second circuit are provided with breakpoints, which have isolation functions and are safer.

[0033] like Figure 1-2 As shown, the circuit breaker in this embodiment also includes an operating component 1. The operating component 1 is disposed at one end of the housing 15 along its length. The operating component 1 is driven and connected to the first operating mechanism, and the first operating mechanism is driven and connected to the second operating mechanism. The operating component 1 drives the first operating mechanism, and the first operating mechanism then drives the second operating mechanism to operate.

[0034] In this embodiment of the circuit breaker, the operating element 1 is preferably a button that is slidably inserted into the housing 15. Further, as... Figure 2 As shown, the button and the circuit breaker output terminal are arranged side by side along the width direction of the housing 15. The operating element 1, the first operating and contact system 6 and the second operating and contact system 11 are arranged sequentially along the length direction of the housing 15, that is, sequentially arranged along one direction inside the housing 15. The distance between the first operating and contact system 6 and the second operating and contact system 11 and the operating element 1 is different, unlike the prior art where the first operating and contact system 6 and the second operating and contact system 11 are arranged side by side along the width direction of the housing 15 and the same distance from the operating element 1.

[0035] In other embodiments, the operating element 1 may also be a rotary handle to drive the first operating mechanism.

[0036] like Figure 2-4 As shown, the first operating mechanism is driven and connected to the second operating mechanism through the linkage 16. The transmission method of the first and second operating mechanisms is simple and reliable, ensuring the synchronous operation of the two contact systems. Further, the first operating mechanism includes a first lever 6-2 rotatably mounted on the housing 15 and driven and connected to the first moving contact 6-8. The second operating mechanism includes a second lever 11-0 rotatably mounted on the housing 15 and driven and connected to the second moving contact 11-1. The first lever 6-2 is driven and connected to the second lever 11-0 through the linkage 16. The first lever 6-2 and the second lever 11-0 rotate synchronously. The rotation of the first lever 6-2 drives the first moving contact 6-8 to close or open with the first stationary contact 6-9, while the rotation of the second lever 11-0 drives the second moving contact 11-1 to close or open with the second stationary contact 11-3.

[0037] like Figure 2-3 As shown, the rotation directions of the first lever 6-2 and the second lever 11-0 are opposite. That is, the rotation direction of the first lever 6-2 when it rotates to drive the first contact system to close or open is opposite to the rotation direction of the second lever 11-0 when it rotates to drive the second contact system to close or open. Specifically, as... Figure 2-3 As shown, the first lever 6-2 rotates clockwise or counterclockwise to drive the first contact system to open or close; the second lever 11-0 rotates counterclockwise or clockwise to drive the second contact system to open or close. Of course, by swapping the positions of the second moving contact 11-1 and the second stationary contact 11-3, or by swapping the positions of the first moving contact 6-8 and the first stationary contact 6-9, the rotation directions of the first lever 6-2 and the second lever 11-0 can also be set to remain the same.

[0038] like Figure 4 As shown, the first lever 6-2 and the second lever 11-0 are rotatably connected to both ends of the linkage 16. Specifically, as... Figure 4 As shown, the linkage 16 includes a first linkage transmission part 16-1, a linkage transmission plate 16-0, and a second linkage transmission part 16-2 connected in sequence; the first lever 6-2 includes a first lever connecting part 6-2-0, which is rotatably connected to the first linkage transmission part 16-1, and the rotation axis of the first lever connecting part 6-2-0 and the first linkage transmission part 16-1 (that is, the rotation connection axis of the two) is parallel and spaced apart from the rotation axis of the first lever 6-2; the second lever 11-0 includes a second lever connecting part 11-0-0, which is rotatably connected to the second linkage transmission part 16-1, and the rotation axis of the second lever connecting part 11-0-0 and the second linkage transmission part 16-2 (that is, the rotation connection axis of the two) is parallel and spaced apart from the rotation axis of the second lever 11-0. Furthermore, the first linkage transmission part 16-1 and the second linkage transmission part 16-2 are both located on the same side of the linkage transmission plate 16-0. The two ends of the linkage transmission plate 16-0 are respectively stacked with the first lever 6-2 and the second lever 11-0 along the thickness direction of the housing 15, thereby further saving the thickness space of the housing 15.

[0039] Preferred, such as Figure 4As shown, the first linkage transmission part 16-1 and the first lever connection part 6-2-0 are rotatably connected by a shaft hole, that is, one of them is provided with a hole, and the other is rotatably inserted into the hole as a shaft; or, both are provided with holes, and a shaft is used to rotatably insert them into the two holes respectively; the second linkage transmission part 16-2 and the second lever connection part 11-0-0 are rotatably connected by a shaft hole, that is, one of them is provided with a hole, and the other is rotatably inserted into the hole as a shaft; or, both are provided with holes, and a shaft is used to rotatably insert them into the two holes respectively.

[0040] like Figure 2-3 As shown, the following is an embodiment of the first operating mechanism.

[0041] like Figure 2-3 As shown, the first operating mechanism includes a handle 6-1, a handle reset component 6-0, a first lever 6-2, a second connecting rod 6-3, a lever reset component 6-4, a locking component 6-5, a jump-lock component 6-6, and a jump-lock reset component 6-7. The handle 6-1 and the first lever 6-2 are rotatably mounted on the housing 15. The handle 6-1 is connected to the button (i.e., the operating component 1) via the first connecting rod 3 (preferably a U-shaped connecting rod, with its two ends rotatably connected to the handle 6-1 and the button respectively), and is connected to the locking component 6-5 via the second connecting rod 6-3 (preferably a U-shaped connecting rod, with its two ends rotatably connected to the handle 6-1 and the locking component 6-5 respectively). The handle reset component 6-0... 0 applies a force to the handle 6-1, causing it to tend to rotate towards the open position. That is, when the circuit breaker is opened or tripped, the handle reset component 6-0 drives the handle 6-1 to rotate to the open position. The locking component 6-5 and the tripping component 6-6 are respectively rotatably mounted on the first lever 6-2 and are engaged. The lever reset component 6-4 applies a force to the first lever 6-2, causing it to drive the first moving contact 6-8 to disconnect from the first stationary contact 6-9. The tripping component reset component 6-7 applies a force to the tripping component 6-6, causing it to maintain an engagement with the tripping component 6-5. The first lever 6-2 is provided with a first lever connecting part 6-2-0, which is parallel to and spaced apart from the rotating shaft of the first lever 6-2. Furthermore, the handle reset component 6-4 is preferably a handle reset torsion spring, which is coaxially arranged with the handle component 6-1 (the helical part of the handle reset torsion spring is preferably sleeved on the rotating shaft of the handle component 6-1), and its two ends are respectively engaged with the handle component 6-1 and the housing 15; the lever reset component 6-4 is preferably a lever compression spring, which is arranged between the first lever 6-2 and the housing 15 and its two ends are respectively engaged with the limiting mechanism of both; the jump buckle reset component 6-7 is a jump buckle reset torsion spring, which is coaxially arranged with the jump buckle component 6-6 (the helical part of the jump buckle reset torsion spring is preferably sleeved on the rotating shaft of the jump buckle component 6-6), and its two ends are respectively engaged with the jump buckle component 6-6 and the first lever 6-2.

[0042] In other embodiments, such as when the first operating mechanism is driven by a handle, the first operating mechanism may not have a handle 6-1 and a handle reset 6-0. Instead, the handle is connected to the locking element 6-5 via a connecting rod to drive the first lever 6-2.

[0043] like Figure 2-3 As shown, the following is an embodiment of the second operating mechanism.

[0044] like Figure 2-3 As shown, the second operating mechanism includes a second lever 11-0 and a second moving contact spring 11-2. The second lever 11-0 is rotatably mounted on the housing 15. The second moving contact 11-1 is mounted on the second lever 11-0 and rotates synchronously with it and can rotate relative to the second lever 11-0. One end of the second moving contact spring is fixed (preferably fixed on the housing 15), and the other end is connected to the second moving contact 11-1. When the second moving contact 11-1 is closed with the second stationary contact 11-3, the second moving contact spring 11-2 causes the second moving contact 11-1 to press against the second stationary contact 11-3. After the second moving contact 11-1 is separated from the second stationary contact 11-3, the second moving contact spring 11-2 drives the second moving contact 11-1 to swing away from the second stationary contact 11-3.

[0045] like Figure 2-3 As shown, the second lever 11-0 is rotatably mounted around the second lever axis. The second moving contact 11-1 has a second moving contact hole in the middle. The second moving contact 11-1 is movably mounted on the second lever axis through the second moving contact hole. The inner diameter of the second moving contact hole is larger than that of the second lever axis. The end of the second moving contact 11-1 away from its moving contact point is rotatably mounted on the second lever 11-0 around the second moving contact axis. The second moving contact spring 11-2 is a tension spring. One end of the spring is connected to the second moving contact 11-1 through the second moving contact hole, and the other end is fixedly mounted. Specifically, before the second moving contact 11-1 contacts the second stationary contact 11-3, the second moving contact 11-1 rotates around the second lever axis under the drive of the second lever 11-0. The second moving contact spring 11-2 makes the side wall of the second moving contact hole limit the engagement with the second lever axis so that the second moving contact 11-1 and the second lever 11-0 remain relatively stationary. The second moving contact spring 11-2 applies a force to the second moving contact 11-1 so that the second lever 11-0 has a tendency to rotate away from the second stationary contact 11-3. As soon as the second moving contact 11-1 contacts the second stationary contact 11-3, the second lever 11-0 continues to rotate towards its closed position, so that the second moving contact 11-1 rotates relative to the second lever 11-0 with the second stationary contact 11-3 as the fulcrum. At this time, the second moving contact spring 11-2 applies a force to the second moving contact 11-1 so that it presses the second stationary contact 11-3.

[0046] like Figure 1-2 As shown, the circuit breaker in this embodiment also includes a locking mechanism 2. The locking mechanism 2 and the operating element 1 (preferably a button) are arranged side by side along the width direction of the housing 15. The circuit breaker output terminal and the locking mechanism 2 are located on both sides of the operating element 1. The locking mechanism 2 includes a locking part. When the circuit breaker is closed, the operating element 1 drives the locking mechanism 2 to move, causing the locking part to protrude outside the housing 15. This prevents the circuit breaker from being installed in the circuit breaker mounting position (e.g., distribution cabinet, distribution box, etc.) when the circuit breaker is closed, and also prevents the circuit breaker from being pulled out of the circuit breaker mounting position when the circuit breaker is closed, thereby improving electrical safety. The locking mechanism 2 can be implemented using existing technology, which will not be elaborated here.

[0047] like Figure 2 As shown, the circuit breaker in this embodiment also includes an electric operating mechanism 4 and a circuit board 13 that are driven and connected to the first operating mechanism. The electric operating mechanism 4, the first operating and contact system 6, and the second operating and contact system 11 are arranged sequentially along the length direction of the housing 15 and located between the two ends of the housing 15 along the length direction. The circuit board 13 and the first operating mechanism are stacked together along the thickness direction of the housing 15. Further, the electric operating mechanism 4 is located between the circuit breaker's incoming terminal and the first operating and contact system 6.

[0048] like Figure 2 As shown, the electric operating mechanism 4 includes a drive motor and a gear set connected to the drive motor. The gear set includes a final stage gear, which drives the handle 6-1 of the first operating mechanism. The electric operating mechanism 4 can be implemented using existing technology, which will not be described in detail here.

[0049] like Figure 2 As shown, the circuit breaker in this embodiment also includes a short-circuit protection mechanism 12 and an arc-extinguishing system 7 that cooperate with the first operating mechanism. When a short-circuit fault occurs in the circuit, the short-circuit protection mechanism 12 drives the trip fastener 6-6 to rotate to release the overlap with the locking fastener 6-5, triggering the first operating mechanism to trip and open the circuit. The first operating mechanism simultaneously drives the second operating mechanism to open the circuit. The short-circuit protection mechanism 12 and the arc-extinguishing system 7 are arranged side by side along the width direction of the housing 15 and are located between the first operating and contact system 6 and the second operating and contact system 11, so that the two are spaced apart.

[0050] like Figure 2As shown, the circuit breaker in this embodiment also includes an overload protection mechanism 5 that cooperates with the first operating mechanism. When an overload fault occurs in the circuit, the overload protection mechanism 5 drives the trip fastener 6-6 to rotate to release the engagement with the locking fastener 6-5, triggering the first operating mechanism to trip and open the circuit. The overload protection mechanism 5 and the first operating and contact system 6 are arranged side by side along the width direction of the housing 15. Furthermore, the short-circuit protection mechanism 12 and the first operating and contact system 6 are located on one side of the width direction of the housing 15, and the overload protection mechanism 5 and the arc extinguishing system 7 are located on the other side of the width direction of the housing 15.

[0051] like Figure 2 As shown, the short-circuit protection mechanism 12 is preferably an electromagnetic trip unit. The first moving contact 6-8, the short-circuit protection mechanism 12 and the first incoming terminal 9 are electrically connected in sequence. The overload protection mechanism 5 includes a bimetallic strip. The first stationary contact 6-9, the overload protection mechanism 5 and the first outgoing terminal 14a are electrically connected in sequence. The arc extinguishing system 7 includes an arc extinguishing chamber that cooperates with the first contact system.

[0052] like Figure 2 As shown, the housing 15 includes a first arc-quenching channel, one end of which is connected to the outlet of the arc-extinguishing system 7, and the other end is connected to the outside; the first arc-quenching channel and the second operation and contact system 11 are arranged side by side along the width direction of the housing 15. Figure 2-3 As shown, in this embodiment, the second moving contact 11-1 is electrically connected to the second input terminal 10 of the second circuit via a second flexible connection 19 and a second terminal block 17 connected in sequence. Further, the second stationary contact 11-3 includes a second stationary conductive plate and a second stationary contact 11-3-2. One end of the second stationary conductive plate is provided with the second stationary contact 11-3-2, and the other end is connected to the second output terminal 14b. The second terminal block 17 includes a second terminal block head section 17-0 disposed at one end. The second moving contact 11-1 is connected to the second terminal block head section 17-0 via the second flexible connection 19. The other end of the second terminal block 17 is connected to the second input terminal 10. The second terminal block head section 17-0 is disposed opposite to the second stationary conductive plate, and the end of the second moving contact 11-1 with the moving contact oscillates between the second stationary conductive plate and the second terminal block head section 17-0. This structural design reduces the loop resistance of the second circuit and increases the movement space of the second moving contact. Further, as... Figure 3As shown, the second static conductive plate includes a first static conductive plate part 11-3-0 and a second static conductive plate part 11-3-1. One end of the second static conductive plate part 11-3-1 is connected to the second outgoing terminal 14b, and the other end is bent and connected to the first static conductive plate part 11-3-0. The second static contact 11-3-2 is disposed on the free end of the first static conductive plate part 11-3-0. The first static conductive plate part 11-3-0 and the second terminal block 17 are spaced apart to form a second arc channel. One end of the second arc channel is connected to the second static contact. One end of the moving contact of the head 11-1 is opposite to the other end, which is opposite to the second inlet terminal 10. The second terminal block 17 has the function of carrying current and also the function of arc induction, which draws the arc away from the second moving contact 11-1, avoids or significantly reduces the burning of the second moving contact 11-1 by the arc, and extends the service life of the second moving contact 11-1. When the second moving contact 11-1 is closed with the second stationary contact 11-3, the current flowing through the second moving contact 11-1 and the first part 11-3-0 of the stationary conductive plate is in the same direction.

[0053] like Figure 2-3 As shown, the first part 11-3-0 of the static conductive plate includes a first section 11-3-0-0 and a middle section 11-3-0-1. The first section 11-3-0-0, the middle section 11-3-0-1, and the second part 11-3-1 are connected in sequence. The second static contact 11-3-2 is disposed on the first section 11-3-0-0. The first section 11-3-0-0 is bent relative to the middle section 11-3-0-1 toward the side where the second part 11-3-1 is located. The first section 11-3-0-0 and the second part 11-3-1 are preferably arranged in parallel. The static conductive plate is preferably a fishhook-shaped structure. The length of the second part is much greater than the length of the first part.

[0054] like Figure 2-3 As shown, the second terminal block 17 includes a second terminal block head section 17-0, a second terminal block neck section 17-1, a second terminal block belly section 17-2, and a second terminal block tail section 17-3 connected in sequence. The second terminal block head section 17-0 is arranged parallel to the stationary conductive plate head section 11-3-0-0. One end of the second moving contact 11-1 with a moving contact is inserted between the second terminal block head section 17-0 and the stationary conductive plate head section 11-3-0-0. The second terminal block belly section 17-2 is arranged parallel to the stationary conductive plate middle section 11-3-0-1. The second terminal block tail section 17-3 is also connected to the second inlet terminal 10. Furthermore, the neck section 17-1 of the second terminal block is bent toward the side where the second stationary contact 11-3 is located relative to the head section 17-0 of the second terminal block, and the neck section 17-1 and the tail section 17-3 of the second terminal block are bent toward the same side of the belly section 17-2 of the second terminal block, and the second stationary contact 11-3 is located on the other side of the belly section 17-2 of the second terminal block.

[0055] like Figure 2 As shown, the circuit breaker in this embodiment also includes a current sampling device 8, an overload protection mechanism 5, an arc extinguishing system 7, and the current sampling device 8 arranged sequentially along the length of the housing 15. The current sampling device 8 and the overload protection mechanism 5 are located on both sides of the arc extinguishing system 7. Further, the current sampling device 8 is located between the arc extinguishing system 7 and the circuit breaker's incoming terminal. Further, the current sampling device 8 is located between the first arc extinguishing channel and the circuit breaker's incoming terminal. Further, the current sampling device 8 is located between the first arc extinguishing channel and the first incoming terminal 9, and the current sampling device 8 and the second arc extinguishing channel are arranged side-by-side along the width of the housing 15.

[0056] like Figure 2 As shown, the current sampling device 8 includes a current transformer, and the short-circuit protection mechanism 12 is connected to the first terminal 9 through the first terminal block 18. The first terminal block 18 passes between the first operation and contact system 11 and the first arc channel (the first terminal block 18 is preferably embedded in the first terminal block slot in the housing 15), and the current transformer is sleeved on the first terminal block 18.

[0057] Specifically, such as Figure 1-2 In the circuit breaker of this embodiment, as shown in the diagram: the first outgoing terminal 14a and the second outgoing terminal 14b are arranged side-by-side at intervals along the thickness direction of the housing 15 at the upper end of the housing 15; the first incoming terminal 9 and the second incoming terminal 10 are arranged side-by-side at intervals from right to left at the lower end of the housing 15; the circuit breaker incoming terminal, the button (i.e., the operating element 1), and the locking mechanism 2 are arranged side-by-side from left to right at the upper end of the housing 15; the electric operating mechanism 4, the first operating and contact system 6, and the second operating and contact system 11 are arranged sequentially from top to bottom between the circuit breaker incoming terminal and the circuit breaker outgoing terminal; the short-circuit protection mechanism 12 and the arc extinguishing system 7 are arranged side-by-side on the left and right and located between the first operating and contact system 6 and the second operating and contact system 11; the first operating and contact system 6 and the overload protection mechanism 5 are arranged side-by-side on the left and right; the second operating and contact system 11 and the first arc extinguishing channel are arranged side-by-side from left to right; the current sampling device 8 is located between the first arc extinguishing channel and the first incoming terminal 9 and is arranged side-by-side with the second arc extinguishing channel from right to left. The internal layout of the circuit breaker in this embodiment is reasonable and compact, which not only ensures the insulation performance inside the housing 15, but also saves internal space and reduces the size of the circuit breaker.

[0058] In other embodiments, such as when the second circuit is an L-pole circuit, the second operating mechanism may further include a second locking element and a second tripping element. The second locking element and the second tripping element are respectively rotatably mounted on the second lever 11-0 and overlapped. The first operating mechanism is connected to the second locking element through the linkage 16. Simultaneously, a second short-circuit protection mechanism and a second overload protection mechanism may be provided corresponding to the second tripping element to contact the overlapped engagement of the second locking element and the second tripping element, triggering the second operating mechanism to trip and open the circuit breaker. Furthermore, in other embodiments, the circuit breaker inlet and outlet terminals may also be located at one end of the length direction of the housing 15, and the button or handle (i.e., operating element 1) may be located at the other end of the length direction of the housing 15.

[0059] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0060] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising a housing (15), a first circuit and a second circuit respectively disposed within the housing (15), and an operating member (1) slidably inserted within the housing (15); the first circuit comprising a first operating and contact system (6), the first operating and contact system (6) comprising a first operating mechanism and a first moving contact (6-8) driven together, and a first stationary contact (6-9) cooperating with the first moving contact (6-8); the second circuit comprising a second operating and contact system (11), the second operating and contact system (11) comprising a second operating mechanism and a second moving contact (11-1) driven together, and a second stationary contact (11-3) cooperating with the second moving contact (11-1); characterized in that: The operating component (1), the first operating and contact system (6), and the second operating and contact system (11) are arranged sequentially along one direction inside the housing (15); the operating component (1) is driven and connected to the first operating mechanism; the first operating mechanism is driven and connected to the second operating mechanism through the linkage component (16); The first operating mechanism includes a first lever (6-2) rotatably mounted on the housing (15) and drivenly connected to the first moving contact (6-8). The second operating mechanism includes a second lever (11-0) rotatably mounted on the housing (15) and drivenly connected to the second moving contact (11-1). The first lever (6-2) is drivenly connected to the second lever (11-0) through a linkage (16). The first lever (6-2) and the second lever (11-0) rotate synchronously.

2. The circuit breaker according to claim 1, characterized in that: The first lever (6-2) and the second lever (11-0) are rotatably connected to both ends of the linkage (16).

3. The circuit breaker according to claim 1, characterized in that: The first lever (6-2) and the second lever (11-0) rotate in opposite directions.

4. The circuit breaker according to claim 2, characterized in that: The linkage (16) includes a first linkage transmission part (16-1), a linkage transmission plate (16-0), and a second linkage transmission part (16-2) connected in sequence; the first lever (6-2) includes a first lever connecting part (6-2-0), which is rotatably connected to the first linkage transmission part (16-1), and the rotation axes of the first lever connecting part (6-2-0) and the first linkage transmission part (16-1) are parallel and spaced apart from the rotation axis of the first lever (6-2); the second lever (11-0) includes a second lever connecting part (11- 0-0), the second lever connecting part (11-0-0) is rotatably connected to the second linkage transmission part (16-2), and the rotation axis of the second lever connecting part (11-0-0) and the second linkage transmission part (16-2) is parallel and spaced apart from the rotation axis of the second lever (11-0); the first linkage transmission part (16-1) and the second linkage transmission part (16-2) are located on the same side of the linkage transmission plate (16-0), and the two ends of the linkage transmission plate (16-0) are stacked with the first lever (6-2) and the second lever (11-0) along the thickness direction of the housing (15).

5. The circuit breaker according to claim 1, characterized in that: The operating component (1) is a button that is slidably inserted into the housing (15), and it is driven and connected to the first operating mechanism through the first connecting rod (3).

6. The circuit breaker according to claim 5, characterized in that: The first operating mechanism includes a handle (6-1), a first lever (6-2), a handle reset component (6-0), a second connecting rod (6-3), a lever reset component (6-4), a locking component (6-5), a jump-lock component (6-6), and a jump-lock reset component (6-7). The handle (6-1) and the first lever (6-2) are rotatably mounted on the housing (15). The handle (6-1) is connected to the button via the first connecting rod (3) and to the locking component (6-5) via the second connecting rod (6-3). The reset component (6-0) applies a force to the handle component (6-1), causing it to tend to rotate towards the open position. The locking component (6-5) and the tripping component (6-6) are respectively rotatably mounted on the first lever (6-2) and overlapped. The lever reset component (6-4) applies a force to the first lever (6-2), causing it to drive the first moving contact (6-8) to disconnect from the first stationary contact (6-9). The tripping component reset component (6-7) applies a force to the tripping component (6-6), causing it to maintain overlapped engagement with the locking component (6-5).

7. The circuit breaker according to claim 6, characterized in that: The handle reset component (6-0) is a handle reset torsion spring, which is coaxially arranged with the handle component (6-1), and its two ends are respectively engaged with the housing (15) and the handle component (6-1); the lever reset component (6-4) is a lever compression spring, which is respectively engaged with the housing (15) and the first lever (6-2); the jump buckle reset component (6-7) is a jump buckle reset torsion spring, which is coaxially arranged with the jump buckle component (6-6), and its two ends are respectively engaged with the jump buckle component (6-6) and the first lever (6-2).

8. The circuit breaker according to claim 6, characterized in that: The circuit breaker also includes a short-circuit protection mechanism (12) and an overload protection mechanism (5) that are respectively driven and cooperate with the trip fastener (6-6).

9. The circuit breaker according to claim 1, characterized in that: The second operating mechanism also includes a second moving contact spring (11-2). The second moving contact (11-1) is mounted on the second lever (11-0) and rotates synchronously with it and can rotate relative to the second lever (11-0). One end of the second moving contact spring (11-2) is fixed, and the other end is connected to the second moving contact (11-1). When the second moving contact (11-1) and the second stationary contact (11-3) are closed, the second moving contact spring (11-2) causes the second moving contact (11-1) to press against the second stationary contact (11-3). After the second moving contact (11-1) and the second stationary contact (11-3) are separated, the second moving contact spring (11-2) drives the second moving contact (11-1) to swing away from the second stationary contact (11-3).

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