circuit breaker

Abstract

The application relates to the low-voltage electrical field, in particular to a circuit breaker. In the closed state, the opening limiting mechanism moves to its closed position, the trip lever is in the locked position and is locked with the locking part, the pressing part moves to the inside of the circuit breaker shell and drives the locking part to move when the pressing part is extruded, the locking part is unlocked with the trip lever, the trip lever moves to the trip position and drives the traction lever to rotate, and the operating mechanism is tripped. In the open state, the opening limiting mechanism moves to its open position and is limited with the trip lever, the trip lever is kept in the failure position, and the trip lever is prevented from moving to the trip position. The circuit breaker has a protection structure for the live plug-in and pull-out, the operating mechanism is tripped when the circuit breaker is inserted or pulled out of the circuit breaker installation position in the closed state, and the operating mechanism is not triggered in the open state.

Description

Technical Field

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

[0002] Circuit breakers are crucial electrical components in low-voltage electrical systems, used to connect and disconnect current. When an overcurrent or short-circuit fault occurs in a circuit, the circuit breaker automatically disconnects the circuit, protecting power lines, motors, and other equipment. For plug-in molded case circuit breakers used in distribution boxes or cabinets, it is essential to ensure the circuit breaker is not conducting during installation to prevent accidents. Even if the circuit breaker's rocker arm assembly is pushed to the closed position during installation, the circuit breaker should not be energized. Current circuit breakers often achieve this protection function through a combination of a live-plug protection structure and a pull rod. However, during plugging or unplugging, whether the circuit is closed or open, the live-plug protection structure triggers the circuit breaker to trip. If not handled carefully, the operating handle can strike the operator, posing a safety hazard. Since there is no risk of electric shock when the circuit breaker is open, designing a live-plug protection structure that does not trip in the open state can effectively reduce the risk of being struck by the handle. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a circuit breaker with a live insertion and removal protection structure that causes the operating mechanism to trip when the circuit breaker is in the closed state and when the circuit breaker is inserted or removed from the installation position, and does not trigger the operating mechanism to trip when the circuit breaker is in the open state.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A circuit breaker includes a circuit breaker housing and an operating mechanism and a traction rod disposed within the circuit breaker housing; the operating mechanism is used to drive the circuit breaker to close or open, and the traction rod is pivotally disposed within the circuit breaker housing and drives the operating mechanism to trigger the operating mechanism to trip; the circuit breaker also includes an anti-current insertion protection structure and a tripping limit mechanism, the anti-current insertion protection structure includes a pressing element, a locking element, and a tripping rod, the pressing element including a pressing element force-bearing part that moves between the inside and outside of the circuit breaker housing;

[0006] When the circuit breaker is in the closed state, the tripping limit mechanism moves to its closed position, the tripping rod is in the locked position and engages with the locking member, when the pressing part is squeezed, it moves into the circuit breaker housing and drives the locking member to move, so that the locking member is released from the tripping rod, the tripping rod moves to the tripping position and drives the traction rod to rotate, so that the operating mechanism is released.

[0007] When the circuit breaker is in the open state, the opening limit mechanism moves to its open position and cooperates with the trip lever limit to keep the trip lever in the ineffective position and prevent the trip lever from moving to the trip position.

[0008] Preferably, the tripping limit mechanism is an operating mechanism or a moving contact mechanism of a circuit breaker.

[0009] Preferably, the operating mechanism includes a rocker arm assembly, which swings from the closed position to the open position, drives the circuit breaker to switch from the closed state to the open state, and the rocker arm assembly cooperates with the trip lever to keep it in the failure position.

[0010] Preferably, the locking member is rotatably configured, with one end engaging with the pressing member for driving, and the other end engaging with the release lever for locking.

[0011] Preferably, the rotation plane of the locking member is parallel or perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position.

[0012] Preferably, when the circuit breaker switches from the closed state to the open state, the open limit mechanism drives the trip rod to move towards the locking member, from the locked position to the failed position; the trip position, the locked position and the failed position are set sequentially along the moving direction of the trip rod.

[0013] Preferably, the protection structure against live insertion and removal further includes a tripping lever driving structure, which applies a first driving force to the tripping lever, causing it to tend to move towards the tripping position.

[0014] Preferably, the trip lever drive structure is a trip lever drive spring.

[0015] Preferably, the anti-current insertion and removal protection structure is located on one side of the rocker arm assembly, the traction rod is located on the other side of the anti-current insertion and removal protection structure, the locking member is located between the tripping rod and the pressing member, and the sliding direction of the tripping rod is perpendicular to the rotation axis of the rocker arm assembly and perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position.

[0016] Preferably, the trip rod includes a trip rod limiting part that is limited by the trip rod limiting mechanism when the circuit breaker is in the open state, a trip rod driving part that cooperates with the traction rod driving part, and a trip rod cooperating part that is locked with the locking element when the circuit breaker is in the closed state.

[0017] The locking element includes a locking part that engages with the release lever and a first locking element driven part that engages with the pressing element.

[0018] The pressing component also includes a pressing component driving part that is driven and cooperates with the driven part of the first locking component.

[0019] Preferably, the protection structure against live insertion and removal further includes a locking member reset structure, which applies a first reset force to the locking member to reset the locking member so as to engage with the release lever.

[0020] Preferably, the locking member reset structure is a locking member reset spring or a reset torsion spring.

[0021] Preferably, the trip lever further includes a trip lever horizontal plate and a trip lever vertical plate. The trip lever limiting part, the trip lever horizontal plate, the trip lever vertical plate and the trip lever driving part are connected in sequence and have an overall stepped structure. The trip lever limiting part and the trip lever vertical plate are arranged parallel to each other, the trip lever horizontal plate and the trip lever driving part are arranged parallel to each other, one end of the trip lever mating part is connected to the trip lever limiting part, and the other end is bent toward the side where the trip lever horizontal plate is located to form a trip lever mating protrusion that locks with the locking part of the locking member.

[0022] Preferably, a release rod clearance gap is provided between the free end of the release rod mating part and the release rod cross plate to allow the locking part of the locking member to disengage, and a release rod travel space is formed between the release rod mating protrusion and the release rod limiting part to allow the locking part of the locking member to move.

[0023] Preferably, the locking component further includes a locking component mounting part, a locking component intermediate plate, and a locking component connecting plate. The locking component is rotatably mounted via the locking component mounting part. Both ends of the locking component intermediate plate are bent and connected to one end of the locking component mounting part and one end of the locking component connecting plate, respectively. The locking component mounting part and the locking component connecting plate are arranged parallel to each other. The other end of the locking component connecting plate is bent and connected to the locking part of the locking component. The locking part of the locking component is arranged parallel to the locking component intermediate plate. One end of the first locking component moving part is connected to the locking component intermediate plate, and the other end is bent to form a locking component curved surface that cooperates with the pressing component driving part. The first locking component moving part and the locking part of the locking component are located on both sides of the locking component intermediate plate, respectively.

[0024] Preferably, the pressing component further includes a pressing component guide portion, a pressing component sliding portion, and a pressing component limiting portion. The pressing component guide portion and the pressing component driving portion are respectively bent and connected to both ends of the pressing component force-bearing portion. One end of the pressing component sliding portion is connected to the pressing component force-bearing portion, and the other end is connected to the pressing component limiting portion. The pressing component guide portion, the pressing component sliding portion, and the pressing component driving portion are arranged side by side at intervals on one side of the pressing component force-bearing portion. The circuit breaker housing is provided with a pressing component clearance groove, and the bottom wall of the pressing component clearance groove is provided with a first... The structure includes an opening, a second opening for the drive part of the pressing component to pass through, and a third opening that mates with the guide part of the pressing component; the anti-electric insertion and removal protection structure also includes a pressing component reset spring, the pressing component limiting part is located inside the circuit breaker housing and is limited to the inner side of the circuit breaker housing, the pressing component reset spring is sleeved on the sliding part of the pressing component and its two ends are respectively limited to the bottom wall of the pressing component clearance groove and the pressing component force-bearing part, and the pressing component reset spring applies a second reset force to the pressing component to keep the pressing component force-bearing part protruding outside the circuit breaker housing.

[0025] Preferably, the pressing member limiting part is a conical structure, with its large-diameter end connected to the pressing member sliding part and forming a pressing member stepped surface at the connection between the two, which is limited and matched with the inner side of the circuit breaker housing. The outer diameter of the small-diameter end of the pressing member limiting part is smaller than the inner diameter of the first opening, and the outer diameter of the large-diameter end of the pressing member limiting part is larger than the inner diameter of the first opening. A deformation hole is provided on the large-diameter end of the pressing member limiting part.

[0026] Preferably, the protection structure against live plugging and unplugging further includes a mechanism bracket fixed on the circuit breaker housing, a tripping rod slidably mounted on the mechanism bracket, and a locking member rotatably mounted on the mechanism bracket via a locking member shaft.

[0027] Preferably, the mechanism support includes a support base and a support cover for use. The support base includes a first support base side plate and a second support base side plate disposed opposite to each other. The first support base side plate is provided with a first guide rail groove, and the second support base side plate is provided with a second guide rail surface. The release rod has a first release rod rail boss and a second release rod rail boss on both sides of the release rod vertical plate, which are respectively slidably engaged with the first guide rail groove and the second guide rail surface. The two ends of the locking member's rotating shaft are respectively connected to the first support base side plate and the second support base side plate, and the locking member is located between the first support base side plate and the second support base side plate.

[0028] Preferably, the bracket cover includes a first bracket cover side plate and a second bracket cover side plate arranged in parallel, a bracket cover connecting plate, and a bracket cover limiting plate; one end of the first bracket cover side plate is bent and connected to one end of the bracket cover connecting plate, the other end of the bracket cover connecting plate is bent and connected to the bracket cover limiting plate, the bracket cover limiting plate is bent and connected to the second bracket cover side plate, the bracket cover limiting plate is located between the first bracket cover side plate and the second bracket cover side plate, the side of the bracket cover limiting plate is perpendicular to the side of the first bracket cover side plate, and the first bracket cover side plate is provided with a bracket cover side plate guide groove; the first bracket cover side plate and the second bracket cover side plate are respectively arranged on both sides of the first bracket seat side plate and the second bracket seat side plate, the bracket cover limiting plate is limited and engaged with the second bracket seat side plate, and one end of the locking member shaft is inserted into the guide groove of the bracket cover side plate; the anti-electric insertion and removal protection structure also includes a tripping rod driving structure, the tripping rod driving structure is a tripping rod driving spring, the tripping rod driving spring is arranged between the tripping rod limiting part of the tripping rod and the bracket cover limiting plate.

[0029] Preferably, the circuit breaker further includes an electromagnetic actuation structure connected to the control module of the circuit breaker. The electromagnetic actuation structure includes an iron core that drives and cooperates with the locking member. When the electromagnetic actuation structure is energized, the iron core pushes out to drive the locking member to act and release it from the locking engagement with the trip lever.

[0030] Preferably, the electromagnetic actuation structure further includes an electromagnetic coil sleeved on the outside of the iron core, an iron core baffle sleeved on the end of the iron core near the locking member and slidingly engaged with the iron core, and an iron core spring sleeved on the iron core with its two ends respectively engaged with the iron core and the iron core baffle.

[0031] Preferably, the circuit breaker further includes a flux converter, which includes a trip lever, a locking element, and an electromagnetic actuation structure.

[0032] Preferably, the operating mechanism includes an operating mechanism bracket, a rocker arm assembly, a locking fastener, a jumping fastener, and a re-fastener rotatably mounted on the operating mechanism bracket, as well as a crank and a connecting rod; the locking fastener engages with the jumping fastener, the re-fastener engages with the locking fastener for a limiting engagement, the traction rod engages with the re-fastener for a driving engagement, the crank is rotatably connected to the jumping fastener, one end of the connecting rod is rotatably connected to the crank, and the other end is rotatably connected to the moving contact mechanism of the circuit breaker;

[0033] The circuit breaker also includes wiring terminals, which include incoming wiring terminals and outgoing wiring terminals. Both incoming and outgoing wiring terminals are located at the same end of the circuit breaker housing. The wiring terminals and the operating mechanism are respectively located at opposite ends of the circuit breaker housing.

[0034] The circuit breaker of this invention features a live insertion / removal protection structure. The tripping limit mechanism and the pressing component work together to prevent electric shock to the operator. Firstly, when the circuit breaker is inserted into or removed from its mounting position while closed, the pressing component drives the locking component to release its latching engagement with the tripping lever, causing the tripping lever to trigger the operating mechanism and prevent electric shock. Secondly, when the circuit breaker is open, the tripping lever is limited by the tripping limit mechanism, preventing the operating mechanism from tripping. Therefore, when the circuit breaker is inserted into or removed from its mounting position while open, the handle of the operating mechanism will not strike the operator.

[0035] Furthermore, the electromagnetic actuation structure also triggers the rotation of the traction rod by the locking element and the tripping rod to disengage the operating mechanism, which can effectively reduce the product size and expand the function of the circuit breaker; moreover, the tripping rod, the locking element and the electromagnetic actuation structure constitute the flux converter of the circuit breaker of the present invention, which has flux function, plug-in tripping protection function and tripping non-tripping function. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the circuit breaker of the present invention;

[0037] Figure 2 This is the present invention. Figure 1 An enlarged structural diagram of part A;

[0038] Figure 3 This is a schematic diagram of the assembly structure of the rocker arm and the rocker arm limiting part of the present invention;

[0039] Figure 4 This is the structural intent of the support structure of the present invention;

[0040] Figure 5 This is a schematic diagram of the release lever of the present invention;

[0041] Figure 6 This is a schematic diagram of the locking component of the present invention;

[0042] Figure 7 This is a schematic diagram of the pressing component of the present invention;

[0043] Figure 8 This is a schematic diagram of the structure of the traction rod of the present invention;

[0044] Figure 9 This is a schematic cross-sectional view of the circuit breaker of the present invention. The circuit breaker is in the closed state and is installed in the circuit breaker mounting position and in place.

[0045] Figure 10 This is a cross-sectional structural schematic diagram of the circuit breaker of the present invention. When the circuit breaker is in the closed state, it is pulled out of the circuit breaker mounting position, so that the pressing member is squeezed by the mounting position housing of the circuit breaker mounting position.

[0046] Figure 11This is a cross-sectional structural schematic diagram of the circuit breaker of the present invention. The circuit breaker is in the open state and is installed in the circuit breaker mounting position and in place.

[0047] Figure 12 This is a cross-sectional structural schematic diagram of the circuit breaker of the present invention. The circuit breaker is in the open state and is pulled out of the circuit breaker mounting position, so that the pressing part is squeezed by the mounting position housing.

[0048] Figure 13 This is a schematic diagram of the circuit breaker of the present invention. The locking component of its anti-current plugging and unplugging protection structure is also driven by the electromagnetic actuation structure. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-13 The given embodiments 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 of the following embodiments.

[0050] like Figure 1-13 The diagram shows an embodiment of the circuit breaker of the present invention. In this embodiment, the circuit breaker of the present invention is preferably a plug-in molded case circuit breaker that is assembled in a distribution box or distribution cabinet by a plug-in method.

[0051] like Figure 1-2 As shown in Figures 9-13, the circuit breaker of this embodiment includes a circuit breaker housing 2 and an operating mechanism and a traction rod 1 disposed within the circuit breaker housing. The operating mechanism is used to drive the circuit breaker to open or close. The traction rod 1 is pivotally disposed within the circuit breaker housing and drives the operating mechanism to trigger the operating mechanism to trip. The circuit breaker also includes an anti-current insertion protection structure and a tripping limit mechanism disposed within the circuit breaker housing. The anti-current insertion protection structure includes a pressing member 6, a locking member 5, and a tripping rod 4. The pressing member 6 includes a pressing member force-bearing part 6- that moves between the inside and outside of the circuit breaker housing. 0; When the circuit breaker is in the closed state, the tripping limit mechanism moves to its closed position, the tripping lever 4 is in the locked position and locked with the locking member 5. When the pressing part 6-0 is squeezed, it moves into the circuit breaker housing, simultaneously driving the locking member 5 to move and release the locking engagement with the tripping lever 4. The tripping lever 4 moves to the tripping position and drives the traction rod 1 to rotate, causing the operating mechanism to trip. When the circuit breaker is in the open state, the tripping limit mechanism moves to its open position and limits the tripping lever 4, keeping the tripping lever 4 in the ineffective position and preventing the tripping lever 4 from moving to the tripping position. Further, the operating mechanism includes a rotatably mounted rocker arm assembly 3, which swings to drive the circuit breaker to open or close.

[0052] The circuit breaker of this invention features a live insertion / removal protection structure. The tripping limit mechanism and the pressing component work together to prevent electric shock to the operator. Firstly, when the circuit breaker is inserted into or removed from its mounting position while closed, the pressing component drives the locking component to release its latching engagement with the tripping lever, causing the tripping lever to trigger the operating mechanism and prevent electric shock. Secondly, when the circuit breaker is open, the tripping lever is limited by the tripping limit mechanism, preventing the operating mechanism from tripping. Therefore, when the circuit breaker is inserted into or removed from its mounting position while open, the handle of the operating mechanism will not strike the operator.

[0053] The circuit breaker mounting position is a corresponding structure inside the distribution cabinet or distribution box for installing the circuit breaker. The distribution cabinet or distribution box is provided with a mounting position opening or receiving groove that corresponds to and cooperates with the pressing force-bearing part 6-0, so that when the circuit breaker is installed in the circuit breaker mounting position and in place, the pressing force-bearing part 6-0 can protrude outside the circuit breaker housing and be received in the opening or receiving groove.

[0054] The operating mechanism also includes an operating mechanism bracket, on which locking fasteners, jumping fasteners, and re-fasteners are rotatably mounted, as well as a crank and a connecting rod. The rocker arm assembly 3 is also rotatably mounted on the operating mechanism bracket. The locking fasteners are locked to the jumping fasteners, the re-fasteners are limited to the locking fasteners, the traction rod 1 is driven to the re-fasteners, the crank is rotatably connected to the jumping fasteners, one end of the connecting rod is rotatably connected to the crank, and the other end is driven to the moving contact mechanism of the circuit breaker. The traction rod 1 rotates from its initial position to its operating position, simultaneously driving the re-fasteners to rotate so that they release their limited engagement with the locking fasteners. The locking fasteners and jumping fasteners release their locking engagement, and the operating mechanism disengages. The layout and specific structure of the operating mechanism can be implemented using existing technology, and will not be described in detail here.

[0055] Furthermore, the circuit breaker in this embodiment may also include a short-circuit protection mechanism and an overload protection mechanism that cooperate with the traction rod 1. When a short circuit or overload fault occurs in the circuit, the short-circuit protection mechanism or the overload protection mechanism drives the traction rod 1 to rotate, causing the operating mechanism to trip.

[0056] The circuit breaker in this embodiment includes wiring terminals, which include incoming wiring terminals and outgoing wiring terminals. For example, in a plug-in circuit breaker, the incoming wiring terminals and outgoing wiring terminals are located at the same end of the circuit breaker housing, and the wiring terminals and the operating mechanism are respectively located at opposite ends of the circuit breaker housing.

[0057] like Figure 9-12 As shown, in this embodiment, when the circuit breaker switches from the closed state to the open state, the open limit mechanism drives the trip rod 4 to move towards the locking member 5, from the locked position to the ineffective position, causing the engagement position between the locking member 5 and the trip rod 4 to exceed the preset engagement position, thus preventing locking; in such cases... Figure 9-11In this configuration, the tripping position, locking position, and failure position are arranged sequentially from left to right; the tripping lever 4 moves to the left from the locking position to the tripping position and to the right from the failure position.

[0058] like Figure 1 , 2 As shown in Figure 13, the anti-current-plugging protection structure also includes a tripping rod driving structure 7. The tripping rod driving structure 7 applies a first driving force to the tripping rod 4, causing it to tend to move towards the tripping position. That is, when the circuit breaker is in the closed state, after the pressing member 6 is squeezed, causing the locking member 5 to disengage from the tripping rod 4, the tripping rod driving structure 7 moves the tripping rod 4 from the locked position to the tripping position, causing the operating mechanism to trip. Further, as... Figure 1 , 2 As shown in Figure 13, the trip rod drive structure 7 is a trip rod drive spring. When the trip rod 4 is in the locked position, the trip rod drive spring stores energy. When the circuit breaker is in the closed state, after the locking member 5 and the trip rod 4 are released from the locking engagement, the trip rod drive spring releases energy and drives the trip rod 4 to move from the locked position to the trip position.

[0059] like Figure 1 , 2 As shown in Figure 4, the live insertion / removal protection structure further includes a locking member reset structure 8. The locking member reset structure 8 applies a first reset force to the locking member 5, causing the locking member 5 to move to the locked position to engage with the release lever 4. Further, as... Figure 1 , 2 As shown in Figure 4, the locking member reset structure 8 is a locking member elastic reset member. When the pressing member 6 is pressed, it drives the locking member 5 to rotate, thereby releasing the locking engagement with the release lever 4. At the same time, the locking member elastic reset member stores energy. When the pressing member 6 is not pressed (that is, when the pressing member 6 is released), the locking member elastic reset member drives the locking member 5 to move towards the locked position. Specifically, as shown in Figure 4... Figure 1 , 2 As shown in Figure 4, the locking element reset structure 8 is a torsion spring, sleeved on the locking element shaft 9-2 used for pivoting the locking element 5. One end is fixed, for example, fixed on the mechanism bracket 9 of the anti-electric insertion and removal protection structure, and the other end cooperates with the locking element 5. It should be noted that the locking element reset structure 8 can also be a tension spring or a spring sheet. The locking element reset structure 8 can also be a pressing element 6. When the pressing element 6 is released and reset, it simultaneously drives the locking element 5 to reset. Of course, the locking element reset structure 8 can also be implemented in many other ways, which will not be described one by one here.

[0060] like Figure 9-13 The described anti-live-plugging protection structure further includes a pressing member reset member 10, which applies a second reset force to the pressing member 6 to keep the pressing member force-bearing part 6-0 protruding outside the circuit breaker housing. Further, as... Figure 9-13 As shown, the pressing component reset component 10 is a pressing component reset spring, which is sleeved on the pressing component sliding part 6-3 of the pressing component 6, and its two ends are respectively engaged with the circuit breaker housing and the pressing component force receiving part 6-0.

[0061] Preferably, the tripping limit mechanism is an operating mechanism or a moving contact mechanism of the circuit breaker. Specifically, after the circuit breaker trips, the operating mechanism or moving contact mechanism moves to the corresponding tripping position, which can directly or indirectly limit the tripping lever 4. For example, the rocker arm assembly 3, crank, or connecting rod of the operating mechanism, the contact support or moving contact of the moving contact mechanism, etc., all of which are structures whose position or state changes when the circuit breaker trips, can move to their corresponding tripping position when the circuit breaker trips, directly limiting the tripping lever 4, or limiting the tripping lever 4 through an intermediate transmission structure. Of course, the tripping limit mechanism can also be other separately established mechanisms for limiting the tripping lever 4 after the circuit breaker switches to the tripping state, such as an automatic reclosing mechanism.

[0062] Preferred, such as Figure 9-13 As shown, the locking element 5 is rotatably configured, with one end engaging with the pressing element 6 for driving, and the other end engaging with the tripping lever 4 for locking. Furthermore, the rotation plane of the locking element 5 is parallel or perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position. In this embodiment of the circuit breaker, the rotation plane of the locking element 5 is preferably parallel to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position, which simplifies the structure of the locking element 5 and reduces the installation space occupied by it. It should be noted that the angle between the rotation plane of the locking element 5 and the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position can be any angle, that is, any value within the range of 0-360°. Adaptive adjustments can be made to the structure and position of the locking element 5 to accommodate changes in the angle between the two.

[0063] Preferred, such as Figure 9-13 As shown, the trip lever 4 is slidably mounted, and the pressing member 6 is slidably mounted on the circuit breaker housing. When the circuit breaker is in the closed state, the pressing member's force-bearing part 6-0 is compressed, causing the pressing member 6 to slide towards the inside of the circuit breaker housing. The pressing member 6 drives the locking member 5 to rotate, thereby releasing its locking engagement with the trip lever 4. The trip lever 4 then slides, driving the traction rod 1 to rotate, thus disengaging the operating mechanism. It should be noted that the pressing member 6 can also be rotatably mounted on the housing, and has a force-bearing part that engages with the mounting position, and a driving part that engages with the locking member 5. When the pressing member 6 is compressed by external force, it swings towards the inside of the circuit breaker housing, causing the force-bearing part 6-0 of the pressing member to retract into the circuit breaker housing.

[0064] Preferred, such as Figure 1-2As shown in Figures 9-13, the anti-live-plugging protection structure also includes a mechanism bracket 9 fixed on the circuit breaker housing. The tripping rod 4 is slidably mounted on the mechanism bracket 9, and the locking element 5 is rotatably mounted on the mechanism bracket 9 via a locking shaft 9-2. Alternatively, the anti-live-plugging protection structure may omit the mechanism bracket 9 and instead design a structure on the circuit breaker housing with a similar function to the mechanism bracket 9, thereby slidably mounting the tripping rod 4 on the circuit breaker housing and rotatably mounting the locking element 5 on the circuit breaker housing.

[0065] The following will be in conjunction with the instruction manual. Figure 9-12 The operation process of the circuit breaker in this embodiment will be explained as follows:

[0066] like Figure 9-12 As shown, the trip lever 4 includes a trip lever limiting part 4-0 that is limited by the trip lever limiting mechanism when the circuit breaker is in the open state, a trip lever driving part 4-4 that drives and cooperates with the traction lever 1, and a trip lever cooperating part 4-2 that locks and cooperates with the locking member 5 when the circuit breaker is in the closed state; the locking member 5 includes a locking member locking part 5-3 that locks and cooperates with the trip lever cooperating part 4-2 and a first locking member driven part 5-4 that drives and cooperates with the pressing member 6; the pressing member 6 also includes a pressing member driving part 6-2 that drives and cooperates with the first locking member driven part 5-4.

[0067] like Figure 9 As shown, in this embodiment, when the circuit breaker is in the closed state, either inserted into the circuit breaker mounting position and in place or not yet inserted, the trip lever 4 is in the locked position, the tripping limit mechanism is in the closed position and not engaged with the trip lever 4, the locking part 5-3 of the locking member is engaged with the trip lever mating part 4-2, the pressing part 6-0 of the pressing member 6 is not squeezed, and the pressing part 6-0 of the pressing member 6 protrudes outside the circuit breaker housing, and the traction rod 1 is locked with the operating mechanism (the traction rod 1 is in the initial position at this time); in the above state, when the circuit breaker of this embodiment is inserted into or removed from the circuit breaker mounting position, as... Figure 10 As shown, the pressing part 6-0 is pressed by the circuit breaker mounting position, causing the pressing part 6 to move towards the inside of the circuit breaker housing (moving to the left in the figure). The pressing part 6 drives the pressing part driving part 6-2 to move towards the locking part 5. The first locking part driven part 5-4 drives the locking part 5 to rotate (rotating counterclockwise in the figure), causing the locking part 5-3 of the locking part to release the locking engagement with the trip rod engagement part 4-2. The trip rod driving structure 7 drives the trip rod 4 to slide, causing the trip rod 4 to move from the locked position to the trip position. The trip rod driving part 4-4 drives the traction rod 1 to rotate (the traction rod 1 rotates to the traction rod action position), causing the operating mechanism to trip.

[0068] like Figure 11As shown, in this embodiment, the circuit breaker is in the open state, either installed in the circuit breaker mounting position or not yet inserted into the circuit breaker mounting position. The force-bearing part of the pressing member 6 is not squeezed, and the force-bearing part 6-0 of the pressing member protrudes outside the circuit breaker housing. The traction rod 1 is locked with the operating mechanism, and the opening limit mechanism is in the open position, pressing against the trip rod limit part 4-0. That is, the rocker arm assembly 3 and the trip rod limit part 4-0 are in a limiting cooperation, causing the trip rod 4 to move from the locked position to the failure position and remain in the failure position. There is a gap between the locking part 5-3 of the locking member and the trip rod cooperating part 4-2, and the two are not locked together. In the above state, when the circuit breaker is pulled out or inserted into the circuit breaker mounting position, as Figure 12 As shown, the pressing part 6-0 is compressed (e.g., by the pressure of the circuit breaker mounting position), causing the pressing part 6 to move towards the inside of the circuit breaker housing (moving to the left in the figure). The pressing part 6 drives the pressing part driving part 6-2 to move towards the locking part 5, which in turn drives the locking part 5 to rotate (rotating counterclockwise in the figure) through the first locking part driven part 5-4. However, the trip lever 4 is in the inactive position. Although the trip lever 4 does not engage with the locking part 5, it will not change position with the movement of the locking part 5. Therefore, the states of the trip lever 4 and the traction rod 1 will not change. In summary, when the circuit breaker is in the open state, the rocker arm assembly 3 keeps the trip lever 4 in the inactive position. Even if the pressing part 6-0 is compressed, the tripping of the operating mechanism will not be triggered, reducing the risk of the operator being hit by the operating mechanism handle.

[0069] like Figure 1-2 As shown in Figures 9-12, one layout of the circuit breaker in this embodiment is as follows: the anti-current insertion / removal protection structure is located on one side of the rocker arm assembly 3, the traction rod 1 is located on the other side of the anti-current insertion / removal protection structure, the locking member 5 is located between the tripping rod 4 and the pressing member 6, and the sliding direction of the tripping rod 4 is perpendicular to the rotation axis of the rocker arm assembly 3 and perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position. Further, as... Figure 9-12 As shown, the moving direction of the pressing member 6 is perpendicular to the rotation axis of the rocker arm assembly and perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position; the rotation axis of the traction rod 1 is parallel to the rotation axis of the rocker arm assembly 3. Specifically, as... Figure 1-2 As shown, the live-line plugging protection structure is located on the right side of the rocker arm assembly 3, and the traction rod 1 is located on the lower right side of the live-line plugging protection structure (see reference). Figure 9-12 ).

[0070] like Figure 1-3As shown in Figures 9-13, the circuit breaker in this embodiment has a rocker arm assembly 3 as its tripping limit mechanism. The rocker arm assembly 3 includes a rocker arm 3-0 and a rocker arm limiting part 3-1, with the rocker arm limiting part 3-1 located on the outside of the rocker arm 3-0. When the circuit breaker is in the closed state, the rocker arm assembly 3 swings to the closed position, and the rocker arm limiting part 3-1 moves away from the trip rod limiting part 4-0 of the trip rod 4. When the circuit breaker is in the open state, the rocker arm assembly 3 swings to the open position, and the rocker arm limiting part 3-1 abuts against the trip rod limiting part 4-0, driving the trip rod 4 to move from the locked position to the failed position and remain in the failed position. Further, as... Figure 3 As shown, the rocker arm 3-0 has a U-shaped structure, including a rocker arm connecting plate 3-01 and two rocker arm support legs 3-02. The two rocker arm support legs 3-02 are arranged opposite each other and connected to both ends of the rocker arm connecting plate 3-01 respectively. The rocker arm limiting part 3-1 is provided on the outer wall of one of the rocker arm support legs 3-02. Further, as... Figure 1-3 As shown, the rocker arm limiting part 3-1 is a limiting shaft, a limiting boss, or other structure that can limit the release lever 4; the rocker arm limiting part 3-1 can be an integral structure with the rocker arm 3-0, or it can be a structure that is detachably installed on the rocker arm 3-0. Its specific structure and setting position can be adjusted according to actual needs.

[0071] like Figure 8 As shown, this is one embodiment of the traction rod 1: the traction rod 1 includes a rotatably mounted traction rod main shaft 1-0 and a traction rod mating plate 1-1 that extends radially from the traction rod main shaft 1-0. Further, as... Figure 9-12 As shown, the traction rod 1 rotates around the rotation axis of the traction rod main shaft 1. Of course, in order to cooperate with the short-circuit protection mechanism and the overload protection mechanism, the traction rod 1 also needs to be equipped with corresponding mating plates to receive the driving force of the short-circuit protection mechanism and the overload protection mechanism.

[0072] like Figure 5 , 9As shown in Figure -13, one embodiment of the trip lever 4 is as follows: The trip lever 4 further includes a trip lever horizontal plate 4-1 and a trip lever vertical plate 4-3. The trip lever limiting part 4-0, the trip lever horizontal plate 4-1, the trip lever vertical plate 4-3 and the trip lever driving part 4-4 are connected in sequence and have a stepped structure. The trip lever limiting part 4-0 and the trip lever vertical plate 4-3 are arranged parallel to each other, and the trip lever horizontal plate 4-1 and the trip lever driving part 4-4 are arranged parallel to each other. One end of the trip lever mating part 4-2 is connected to the trip lever limiting part 4-0, and the other end is bent toward the side where the trip lever horizontal plate 4-1 is located to form a trip lever mating protrusion 4-21 that locks with the locking part 5-3 of the locking member. Furthermore, a release rod clearance gap 4-20 is provided between the free end of the release rod mating part 4-2 and the release rod cross plate 4-1 for the release rod to disengage the locking part 5-3 of the locking member. A release rod travel space is formed between the release rod mating protrusion 4-21 and the release rod limiting part 4-0 for the movement of the locking part 5-3 of the locking member.

[0073] Preferred, such as Figure 5 As shown, the release lever drive part 4-4 has a release lever drive hole 4-40 in the middle, and the traction lever mating plate 1-1 of the traction lever 1 is inserted into the release lever drive hole 4-40. Further, as... Figure 5 As shown, the trip rod drive part 4-4 is also provided with a trip rod drive boss 4-41. The trip rod drive boss 4-41 protrudes in the direction of the traction rod 1. The trip rod drive boss 4-41 and the trip rod vertical plate 4-3 are located on both sides of the trip rod drive hole 4-40. The trip rod drive boss 4-41 improves the reliability of the cooperation between the trip rod 4 and the traction rod 1.

[0074] Preferred, such as Figure 5 As shown, the two sides of the release lever vertical plate 4-3 are respectively provided with a first release lever track boss 4-30 and a second release lever track boss 4-31, which respectively cooperate with the first guide track groove 9-010 and the second guide track surface 9-020 of the mechanism bracket 9 to improve the sliding stability and reliability of the release lever 4. Further, as... Figure 5 As shown, the vertical plate 4-3 of the release lever has a vertical plate clearance hole 4-32 in the middle, which is used for the locking member extension 5-5 of the locking member 5 that cooperates with the iron core to pass through.

[0075] Preferred, such as Figure 5 As shown, a release rod spring limiting post 4-00 is provided on one side of the release rod limiting part 4-0, which cooperates with the release rod driving spring, i.e., the release rod driving structure 7.

[0076] like Figure 6 , 9As shown in Figure -13, one embodiment of the locking member 5 is as follows: The locking member 5 further includes a locking member mounting part 5-0, a locking member intermediate plate 5-1, and a locking member connecting plate 5-2. The locking member 5 is rotatably set through the locking member mounting part 5-0. Both ends of the locking member intermediate plate 5-1 are bent and connected to one end of the locking member mounting part 5-0 and one end of the locking member connecting plate 5-2, respectively. The locking member mounting part 5-0 and the locking member connecting plate 5-2 are arranged parallel to each other. The other end of the locking member connecting plate 5-2 is bent and connected to the locking member locking part 5-3. The locking member locking part 5-3 and the locking member intermediate plate 5-1 are arranged parallel to each other. One end of the first locking member driven part 5-4 is connected to the middle of the locking member intermediate plate 5-1, and the other end is bent to form a locking member curved surface 5-40 that cooperates with the pressing member driving part 6-2. The first locking member driven part 5-4 and the locking member locking part 5-3 are located on both sides of the locking member intermediate plate 5-1, respectively. Furthermore, the free end of the first locking member driven part 5-4 is bent toward one side of the locking member intermediate plate 5-1, and the locking member mounting part 5-0 and the locking member connecting plate 5-2 are bent toward the other side of the locking member intermediate plate 5-1.

[0077] Preferred, such as Figure 6 As shown, the locking component mounting part 5-0 is provided with a locking component shaft hole 5-00 that cooperates with the locking component rotating shaft 9-2 and a locking component spring connecting hole 5-01 that cooperates with the locking component reset structure 8. The locking component spring connecting hole 5-01 is located on one side of the locking component shaft hole 5-00.

[0078] Preferred, such as Figure 6 As shown, the locking element 5 is a one-piece structure made of metal.

[0079] like Figure 7 , 9 As shown in Figure -13, one embodiment of the pressing member 6 is illustrated: the pressing member 6 further includes a pressing member guide portion 6-1, a pressing member sliding portion 6-3, and a pressing member limiting portion 6-4. The pressing member guide portion 6-1 and the pressing member driving portion 6-2 are respectively bent and connected to both ends of the pressing member force-receiving portion 6-0. One end of the pressing member sliding portion 6-3 is connected to the middle of the pressing member force-receiving portion 6-0, and the other end is connected to the pressing member limiting portion 6-4. The pressing member guide portion 6-1, the pressing member sliding portion 6-3, and the pressing member driving portion 6-2 are arranged side by side at intervals on one side of the pressing member force-receiving portion 6-0. Further, as... Figure 9-12 As shown, the circuit breaker housing is provided with a pressing member clearance groove. The bottom wall of the pressing member clearance groove is provided with a first opening for inserting the pressing member sliding part 6-3, a second opening for the pressing member driving part 6-2 to pass through, and a third opening for cooperating with the pressing member guide part 6-1. The pressing member limiting part 6-4 is located inside the circuit breaker housing and is limited to cooperate with the inner side of the circuit breaker housing. The pressing member reset part 10 is sleeved on the pressing member sliding part 6-3 and its two ends are respectively limited to cooperate with the bottom wall of the pressing member clearance groove and the pressing member force receiving part 6-0.

[0080] Preferred, such as Figure 7 and 9 As shown in Figure 12, the free end of the pressing member driving part 6-2 is provided with a pressing member driving inclined surface 6-20 that cooperates with the locking member curved surface 5-40 to prevent the pressing member 6 and the locking member 5 from jamming when they are engaged.

[0081] Preferred, such as Figure 7 As shown, the pressing member limiting part 6-4 has a conical structure. Its large-diameter end is connected to the pressing member sliding part 6-3, and a pressing member stepped surface is formed at the connection between the two to limit and cooperate with the inner side of the circuit breaker housing. The outer diameter of the small-diameter end of the pressing member limiting part 6-4 is smaller than the inner diameter of the first opening, and the outer diameter of the large-diameter end of the pressing member limiting part 6-4 is larger than the inner diameter of the first opening. A deformation hole is provided on the large-diameter end of the pressing member limiting part 6-4. When the pressing member 6 is installed, the pressing member limiting part 6-4 passes through the first opening from outside the circuit breaker housing through the deformation of the large-diameter end of the pressing member limiting part 6-4 and enters the circuit breaker housing. The assembly is convenient and the pressing member 6 can be assembled from the outside.

[0082] Preferred, such as Figure 7 As shown, the pressing member force-receiving part 6-0 includes a force-receiving protrusion disposed in its middle. The cross-section of the force-receiving protrusion is trapezoidal, including two force-receiving surfaces distributed in a V-shape, which mate with the mounting housing. Further, as... Figure 9-12 As shown, the inner diameter of the first opening matches the outer diameter of the sliding part 6-3 of the pressing member.

[0083] like Figure 4 , 9As shown in Figure -13, this is an embodiment of the mechanism support 9: the mechanism support 9 includes a support base 9-0, a support cover 9-1, and a locking member shaft 9-2 that work together; the support base 9-0 includes a first support base side plate 9-01 and a second support base side plate 9-02 that are arranged opposite to each other. The first support base side plate 9-01 is provided with a first guide rail groove 9-010, and the second support base side plate 9-02 is provided with a second guide rail surface 9-020. The first guide rail groove 9-010 and the second guide rail surface 9-020 are respectively slidably engaged with the first release rod rail boss 4-30 and the second release rod rail boss 4-31 of the release rod 4; the two ends of the locking member shaft 9-2 are respectively connected to the first support base side plate 9-01 and the second support base side plate 9-02; the support cover 9-1 includes a first support cover side plate 9-10 and a second support cover side plate 9-11 that are arranged opposite to each other, a support cover connecting plate 9-13, and a support cover limiting plate 9-12; One end of the first bracket cover side plate 9-10 is bent and connected to one end of the bracket cover connecting plate 9-13. The other end of the bracket cover connecting plate 9-13 is bent and connected to the bracket cover limiting plate 9-12. The bracket cover limiting plate 9-12 is bent and connected to the second bracket cover side plate 9-11. The bracket cover limiting plate 9-12 is located between the first bracket cover side plate 9-10 and the second bracket cover side plate 9-11. The side of the bracket cover limiting plate 9-12 is perpendicular to the side of the first bracket cover side plate 9-10. The bracket cover side plate 9-10 is provided with a bracket cover side plate guide groove 9-100; the first bracket cover side plate 9-10 and the second bracket cover side plate 9-11 are respectively disposed on both sides of the first bracket seat side plate 9-01 and the second bracket seat side plate 9-02, the bracket cover limiting plate 9-12 is on both sides of the second bracket seat side plate 9-02, and the bracket cover limiting plate 9-12 and the second bracket seat side plate 9-02 are in a limiting fit, and one end of the locking member rotating shaft 9-2 is inserted into the bracket cover side plate guide groove 9-100. Further, such as... Figure 4 As shown, the second bracket seat side plate 9-02 is provided with a right-angle notch, and the bracket cover limiting plate 9-12 is inserted into the right-angle notch and limited by one side wall of the right-angle notch; the cooperation between the bracket cover limiting plate 9-12 and the second bracket cover side plate 9-11 and the cooperation between one end of the locking member pivot 9-2 and the guide groove 9-100 of the bracket cover side plate restricts the bracket cover 9-1 from moving away from the release lever limiting part 4-0; the bracket seat 9-0 also includes a first bracket seat connecting plate for connecting the first bracket seat side plate 9-01 and the second bracket seat side plate 9-02, and the first bracket seat side plate 9-01, the second bracket seat side plate 9-02 and the first bracket seat connecting plate are integrally formed into a U-shaped structure.

[0084] Preferred, such as Figure 4As shown, the first guide rail groove 9-010 is a strip-shaped rail groove with one end open. The second guide rail surface 9-020 and the right-angle notch of the second support seat side plate 9-02 are located on both sides of the second support seat side plate 9-02, respectively. The second guide rail surface 9-020 cooperates with the second release rod rail boss 4-31 to restrict the release rod 4 from moving in the direction of the support cover 9-1.

[0085] like Figure 9-13 As shown, this is one layout of the anti-live insertion and removal protection structure: the bracket seat 9-0 of the mechanism bracket 9 is fixed on the circuit breaker housing, the tripping rod 4 and the locking member 5 are both located between the first bracket seat side plate 9-01 and the second bracket seat side plate 9-02, the tripping rod 4 is slidably mounted on the bracket seat 9-0, the locking member reset structure 8 is preferably a torsion spring, the locking member reset structure 8 is sleeved on the locking member rotating shaft 9-2, one end is limited to the bracket seat 9-0, and the other end is engaged with the locking member mounting part 5-0 of the locking member 5, the tripping rod drive spring is located between the tripping rod limiting part 4-0 and the bracket cover limiting plate 9-12; the locking member locking part 5-3 of the locking member 5 is located in the tripping rod travel space between the tripping rod cooperating part 4-2 and the tripping rod cross plate 4-1.

[0086] like Figure 13 As shown, in another embodiment of this application, the circuit breaker further includes an electromagnetic actuation structure 11 connected to the control module of the circuit breaker. The electromagnetic actuation structure 11 includes an iron core 11-0 that is driven and cooperates with the locking member 5. During the process of the circuit breaker being installed and powered on, the electromagnetic actuation structure receives a trip signal from the control module, drives the iron core 11-0 to push out, drives the locking member 5 to release its locking cooperation with the trip lever 4, actuates the traction rod, and causes the operating mechanism to trip. Further, as... Figure 13 As shown, the locking member mounting portion 5-0 of the locking member 5 extends towards the electromagnetic actuation structure 11 to form a locking member extension portion 5-5. The locking member extension portion 5-5 engages with the iron core 11-0 of the electromagnetic actuation structure 11. The iron core 11-0 pushes out to drive the locking member 5 to rotate, thereby releasing it from the locking engagement with the tripping rod 4. Correspondingly, the tripping rod vertical plate 4-3 is provided with a vertical plate clearance hole 4-32 for avoiding the extension portion of the locking member mounting portion 5-0 towards the electromagnetic actuation structure 11. The circuit breaker's anti-current insertion and removal protection structure of this embodiment is particularly suitable for electronic molded case circuit breakers. The electromagnetic actuation structure 11 also triggers the rotation of the traction rod 1 by the locking member 5 and the tripping rod 4 to disengage the operating mechanism, which can simplify the structure.

[0087] like Figure 13The image shows one embodiment of the electromagnetic actuation structure 11: the electromagnetic actuation structure 11 further includes an electromagnetic coil 11-1 sleeved on the outside of the iron core 11-0, an iron core baffle 11-2 sleeved on the end of the iron core 11-0 near the locking member 5 and slidably engaged therewith, and an iron core spring 11-3 sleeved on the iron core 11-0 and engaged at both ends with the iron core 11-0 and the iron core baffle 11-2 respectively. Further, the electromagnetic actuation structure 11 also includes a coil frame, with the iron core 11-0 slidably inserted in the middle of the coil frame, and the electromagnetic coil 11-1 sleeved on the coil frame.

[0088] The tripping lever 4, locking element 5, and electromagnetic actuation structure 11, as components of the flux converter, work together to enable the flux converter to have flux function, closing insertion / removal tripping function, and opening insertion / removal non-tripping function. Specifically, during the circuit breaker's power-on operation, when the control module sends a tripping signal, it drives the iron core to push out, causing the locking element 5 to rotate, thereby driving the circuit breaker to trip, realizing the function of the flux converter. During the circuit breaker's insertion / removal process, in the closed state, the locking element 5 cooperates with the pressing element 6, squeezing the pressing element 6 to make the locking element 5 rotate, driving the circuit breaker to trip, realizing the protection function of closing insertion / removal tripping; in the open state, the tripping lever 4 is limited by the opening limit mechanism, squeezing the pressing element 6 to drive the locking element 5 to rotate, but there is a gap between the locking element 5 and the tripping lever 4, and the positions of the tripping lever 4 and the traction rod 1 remain unchanged, not driving the circuit breaker to trip, realizing the protection function of opening insertion / removal non-tripping. By improving the locking element 5 of the flux converter, the locking element 5 not only cooperates with the iron core 11-0 of the electromagnetic actuation structure 11, but also cooperates with the installation state of the circuit breaker through the pressing element 6. That is, it establishes a transmission relationship with the insertion and removal process, or the state of being installed in place or not installed. This makes the electromagnetic actuation structure 11 and the anti-current insertion and removal protection structure a single component, which effectively simplifies the structure of the circuit breaker. There is no need to set up additional space for the anti-current insertion and removal protection structure, and the space requirement of the anti-current insertion and removal protection structure is also reduced.

[0089] 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 circuit breaker housing and an operating mechanism and a traction rod (1) disposed within the circuit breaker housing; the operating mechanism is used to drive the circuit breaker to close or open, and the traction rod (1) is pivotally disposed within the circuit breaker housing and drives the operating mechanism to trigger the operating mechanism to trip; characterized in that: The circuit breaker also includes a protection structure against live insertion and a tripping limit mechanism. The protection structure against live insertion includes a pressing element (6), a locking element (5), and a tripping rod (4). The pressing element (6) includes a pressing force-bearing part (6-0) that moves between the inside and outside of the circuit breaker housing. When the circuit breaker is in the closed state, the tripping limit mechanism moves to its closed position, the tripping rod (4) is in the locked position and is locked with the locking member (5), when the pressing part (6-0) is squeezed, it moves into the circuit breaker housing and drives the locking member (5) to move, so that the locking member (5) and the tripping rod (4) are unlocked, the tripping rod (4) moves to the tripping position and drives the traction rod (1) to rotate, so that the operating mechanism is tripped; When the circuit breaker is in the open state, the open limit mechanism moves to its open position and cooperates with the trip lever (4) to keep the trip lever (4) in the ineffective position and prevent the trip lever (4) from moving to the trip position.

2. The circuit breaker according to claim 1, characterized in that: The tripping limit mechanism is an operating mechanism or a moving contact mechanism of a circuit breaker.

3. The circuit breaker according to claim 2, characterized in that: The operating mechanism includes a rocker arm assembly (3), which swings from the closed position to the open position, driving the circuit breaker to switch from the closed state to the open state. The rocker arm assembly (3) and the trip rod (4) are limited to keep it in the failure position.

4. The circuit breaker according to claim 1, characterized in that: The locking member (5) is rotatably configured, with one end engaged with the pressing member (6) and the other end engaged with the release lever (4).

5. The circuit breaker according to claim 4, characterized in that: The rotation plane of the locking member (5) is parallel or perpendicular to the direction in which the circuit breaker is inserted into or removed from the circuit breaker mounting position.

6. The circuit breaker according to claim 1, characterized in that: When the circuit breaker switches from the closed state to the open state, the open limit mechanism drives the trip rod (4) to move toward the locking member (5), from the locked position to the failure position; the trip position, the locked position and the failure position are set sequentially along the moving direction of the trip rod (4).

7. The circuit breaker according to any one of claims 1-6, characterized in that: The protection structure against live plugging and unplugging also includes a tripping lever drive structure (7), which applies a first driving force to the tripping lever (4) to make it tend to move toward the tripping position.

8. The circuit breaker according to claim 7, characterized in that: The trip lever drive structure (7) is a trip lever drive spring.

9. The circuit breaker according to claim 3, characterized in that: The anti-current insertion and removal protection structure is set on one side of the rocker arm assembly (3), the traction rod (1) is located on the other side of the anti-current insertion and removal protection structure, the locking member (5) is located between the tripping rod (4) and the pressing member (6), and the sliding direction of the tripping rod (4) is perpendicular to the rotation axis of the rocker arm assembly (3) and perpendicular to the direction of the circuit breaker being inserted into or pulled out of the circuit breaker installation position.

10. The circuit breaker according to any one of claims 1-6, characterized in that: The trip rod (4) includes a trip rod limiting part (4-0) that is limited by the trip rod limiting mechanism when the circuit breaker is in the open state, a trip rod driving part (4-4) that is driven and cooperates with the traction rod (1), and a trip rod cooperating part (4-2) that is locked and cooperates with the locking member (5) when the circuit breaker is in the closed state. The locking member (5) includes a locking member locking part (5-3) that engages with the release lever engagement part (4-2) and a first locking member driven part (5-4) that engages with the pressing member (6). The pressing member (6) also includes a pressing member driving part (6-2) that is driven and cooperates with the first locking member driven part (5-4).

11. The circuit breaker according to any one of claims 1-6, characterized in that: The anti-electric insertion and removal protection structure also includes a locking member reset structure (8), which applies a first reset force to the locking member (5) to reset the locking member (5) so as to engage with the release lever (4).

12. The circuit breaker according to claim 11, characterized in that: The locking reset structure (8) is a locking reset spring or a reset torsion spring.

13. The circuit breaker according to claim 10, characterized in that: The trip lever (4) also includes a trip lever horizontal plate (4-1) and a trip lever vertical plate (4-3). The trip lever limiting part (4-0), the trip lever horizontal plate (4-1), the trip lever vertical plate (4-3) and the trip lever driving part (4-4) are connected in sequence and have a stepped structure. The trip lever limiting part (4-0) and the trip lever vertical plate (4-3) are arranged parallel to each other. The trip lever horizontal plate (4-1) and the trip lever driving part (4-4) are arranged parallel to each other. One end of the trip lever mating part (4-2) is connected to the trip lever limiting part (4-0), and the other end is bent toward the side where the trip lever horizontal plate (4-1) is located to form a trip lever mating protrusion (4-21) that locks with the locking part (5-3) of the locking member.

14. The circuit breaker according to claim 13, characterized in that: The free end of the release lever mating part (4-2) and the release lever cross plate (4-1) are provided with a release lever clearance gap (4-20) for the locking part (5-3) of the locking member to disengage. A release lever travel space for the locking part (5-3) of the locking member is formed between the release lever mating protrusion (4-21) and the release lever limiting part (4-0).

15. The circuit breaker according to claim 10, characterized in that: The locking component (5) further includes a locking component mounting part (5-0), a locking component intermediate plate (5-1), and a locking component connecting plate (5-2). The locking component (5) is rotatably mounted via the locking component mounting part (5-0). The two ends of the locking component intermediate plate (5-1) are bent and connected to one end of the locking component mounting part (5-0) and one end of the locking component connecting plate (5-2), respectively. The locking component mounting part (5-0) and the locking component connecting plate (5-2) are arranged relatively parallel to each other. -2) The other end is bent and connected to the locking part (5-3) of the locking member. The locking part (5-3) of the locking member is arranged parallel to the middle plate (5-1) of the locking member. One end of the first locking member driven part (5-4) is connected to the middle plate (5-1) of the locking member, and the other end is bent to form a locking member curved surface (5-40) that cooperates with the pressing part driving part (6-2). The first locking member driven part (5-4) and the locking part (5-3) of the locking member are located on both sides of the middle plate (5-1) of the locking member, respectively.

16. The circuit breaker according to claim 10, characterized in that: The pressing component (6) further includes a pressing component guide (6-1), a pressing component sliding component (6-3), and a pressing component limiting component (6-4). The pressing component guide (6-1) and the pressing component driving component (6-2) are respectively bent and connected to both ends of the pressing component force-bearing component (6-0). One end of the pressing component sliding component (6-3) is connected to the pressing component force-bearing component (6-0), and the other end is connected to the pressing component limiting component (6-4). The pressing component guide (6-1), the pressing component sliding component (6-3), and the pressing component driving component (6-2) are arranged side by side at intervals on one side of the pressing component force-bearing component (6-0). The circuit breaker housing is provided with a pressing component clearance groove, and the bottom wall of the pressing component clearance groove is provided with a tool for inserting the pressing component into the pressing component. The sliding part of the pressing member (6-3) has a first opening, a second opening for the pressing member driving part (6-2) to pass through, and a third opening that cooperates with the pressing member guide part (6-1); the anti-electric plugging and unplugging protection structure also includes a pressing member reset spring (10), the pressing member limiting part (6-4) is located inside the circuit breaker housing and is limited to the inner side of the circuit breaker housing, the pressing member reset spring (10) is sleeved on the pressing member sliding part (6-3) and its two ends are respectively limited to the bottom wall of the pressing member clearance groove and the pressing member force-bearing part (6-0), the pressing member reset spring (10) applies a second reset force to the pressing member (6) so that the pressing member force-bearing part (6-0) remains protruding outside the circuit breaker housing.

17. The circuit breaker according to claim 16, characterized in that: The pressing member limiting part (6-4) has a conical structure. Its large diameter end is connected to the pressing member sliding part (6-3), and a pressing member stepped surface is formed at the connection between the two to limit and cooperate with the inner side of the circuit breaker housing. The outer diameter of the small diameter end of the pressing member limiting part (6-4) is smaller than the inner diameter of the first opening, and the outer diameter of the large diameter end of the pressing member limiting part (6-4) is larger than the inner diameter of the first opening. A deformation hole is provided on the large diameter end of the pressing member limiting part (6-4).

18. The circuit breaker according to any one of claims 1-6, characterized in that: The anti-electric plugging and unplugging protection structure also includes a mechanism bracket (9) fixed on the circuit breaker housing, a tripping rod (4) slidably mounted on the mechanism bracket (9), and a locking member (5) rotatably mounted on the mechanism bracket (9) via a locking member pivot (9-2).

19. The circuit breaker according to claim 18, characterized in that: The mechanism support (9) includes a support base (9-0) and a support cover (9-1) for cooperative use. The support base (9-0) includes a first support base side plate (9-01) and a second support base side plate (9-02) arranged opposite to each other. The first support base side plate (9-01) is provided with a first guide rail groove (9-010), and the second support base side plate (9-02) is provided with a second guide rail surface (9-020). The release lever (4) includes a release lever vertical plate (4-3). The plate (4-3) has a first release rod rail boss (4-30) and a second release rod rail boss (4-31) on both sides, which are respectively slidably engaged with the first guide rail groove (9-010) and the second guide rail surface (9-020). The two ends of the locking member shaft (9-2) are respectively connected to the first bracket seat side plate (9-01) and the second bracket seat side plate (9-02). The locking member (5) is located between the first bracket seat side plate (9-01) and the second bracket seat side plate (9-02).

20. The circuit breaker according to claim 19, characterized in that: The bracket cover (9-1) includes a first bracket cover side plate (9-10) and a second bracket cover side plate (9-11) arranged in parallel with each other, a bracket cover connecting plate (9-13), and a bracket cover limiting plate (9-12). One end of the first bracket cover side plate (9-10) is bent and connected to one end of the bracket cover connecting plate (9-13), and the other end of the bracket cover connecting plate (9-13) is bent and connected to the bracket cover limiting plate (9-12). The bracket cover limiting plate (9-12) is bent and connected to the second bracket cover side plate (9-11). The bracket cover limiting plate (9-12) is located between the first bracket cover side plate (9-10) and the second bracket cover side plate (9-11). The side of the bracket cover limiting plate (9-12) is adjacent to the side of the first bracket cover side plate (9-10). The first bracket cover side plate (9-10) is provided with a bracket cover side plate guide groove (9-100); the first bracket cover side plate (9-10) and the second bracket cover side plate (9-11) are respectively set on both sides of the first bracket seat side plate (9-01) and the second bracket seat side plate (9-02), the bracket cover limiting plate (9-12) is in a limiting cooperation with the second bracket seat side plate (9-02), and one end of the locking member rotating shaft (9-2) is inserted into the bracket cover side plate guide groove (9-100); the anti-electric plugging and unplugging protection structure also includes a trip rod driving structure (7), the trip rod driving structure (7) is a trip rod driving spring, and the trip rod driving spring is set between the trip rod limiting part (4-0) of the trip rod (4) and the bracket cover limiting plate (9-12).

21. The circuit breaker according to any one of claims 1-6, characterized in that: The circuit breaker also includes an electromagnetic actuation structure (11) connected to the control module of the circuit breaker. The electromagnetic actuation structure (11) includes an iron core (11-0) that is driven to cooperate with the locking member (5). After the electromagnetic actuation structure (11) is energized, the iron core (11-0) pushes out to drive the locking member (5) to act and release it from the locking cooperation with the trip lever (4).

22. The circuit breaker according to claim 21, characterized in that: The electromagnetic actuation structure (11) further includes an electromagnetic coil (11-1) sleeved on the outside of the iron core (11-0), an iron core baffle (11-2) sleeved on one end of the iron core (11-0) near the locking member (5) and slidingly engaged with the iron core (11-0), and an iron core spring (11-3) sleeved on the iron core (11-0) with its two ends engaged with the iron core (11-0) and the iron core baffle (11-2) respectively.

23. The circuit breaker according to claim 21, characterized in that: The circuit breaker also includes a flux converter, which includes a trip lever (4), a locking element (5), and an electromagnetic actuation structure (11).

24. The circuit breaker according to any one of claims 1-6, characterized in that: The operating mechanism includes an operating mechanism bracket, a rocker arm assembly (3), a locking fastener, a jumping fastener, and a re-fastener rotatably mounted on the operating mechanism bracket, as well as a crank and a connecting rod; the locking fastener is locked to the jumping fastener, the re-fastener is limited to the locking fastener, the traction rod (1) is driven to the re-fastener, the crank is rotatably connected to the jumping fastener, one end of the connecting rod is rotatably connected to the crank, and the other end is driven to the moving contact mechanism of the circuit breaker; The circuit breaker also includes wiring terminals, which include incoming wiring terminals and outgoing wiring terminals. Both incoming and outgoing wiring terminals are located at the same end of the circuit breaker housing. The wiring terminals and the operating mechanism are respectively located at opposite ends of the circuit breaker housing.

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