Molded case circuit breaker

Abstract

A molded case circuit breaker comprises a rotating shaft system and an operating mechanism, the operating mechanism comprises a support, a rocker arm assembly, an energy storage spring, a hasp mechanism and a connecting rod mechanism, the connecting rod mechanism comprises a crank and a first connecting rod, and the molded case circuit breaker further comprises an alarm microswitch and an auxiliary microswitch. The rocker arm assembly drives the first connecting rod to act through the crank, so that the first connecting rod drives the rotating shaft system to rotate, the rotating shaft system drives the moving contact to rotate to conduct and disconnect a main loop to realize closing and opening of the circuit breaker, and the connecting rod mechanism simultaneously triggers the auxiliary microswitch to switch an output state during closing and / or opening; when the jump pin and the lock catch are tripped, the energy storage spring drives the rotating shaft system to disconnect a main loop through the connecting rod mechanism, and the hasp mechanism triggers the alarm microswitch to switch an output state during tripping, so that the auxiliary contact and the alarm contact can be relatively far away from the moving and static contacts and the rotating shaft system, and the overall structure is more compact.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a molded case circuit breaker. Background Art

[0002] With the continuous development of photovoltaic technology, the performance requirements of its power distribution system for molded case circuit breakers are gradually increasing, prompting the continuous development of molded case circuit breaker products towards smaller volume and higher performance.

[0003] The auxiliary contacts and alarm contacts of existing molded case circuit breakers are usually triggered by a rotating shaft system provided with a moving contact. The micro switches of the auxiliary contacts and alarm contacts are directly installed above the rotating shaft system close to it, or the auxiliary contacts and alarm contacts are made into a module and installed in the accessory slot of the molded case circuit breaker. Such technical solutions all require installing the auxiliary contacts and alarm contacts above the rotating shaft system close to it, but the space here is relatively tight, making it difficult to arrange or requiring occupying the accessory slot or increasing the volume of the circuit breaker; moreover, the distance from here to the moving contact and static contact is relatively close, and it is close to the high-temperature arc gas, making it easy to be damaged. Summary of the Invention

[0004] The purpose of the present invention is to overcome at least one defect of the prior art and provide a molded case circuit breaker.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A molded case circuit breaker includes a rotating shaft system and an operating mechanism. The operating mechanism includes a bracket, a rocker arm assembly, a energy storage spring, a latching mechanism and a link mechanism. At least one moving contact is provided on the rotating shaft system. The link mechanism includes a crank and a first link. The rocker arm assembly is rotatably installed on the bracket. The latching mechanism includes a latch and a trip that are latched. The latch and the trip are respectively rotatably installed on the bracket. The crank is rotatably installed on the trip through a first shaft. One end of the first link is rotatably connected to the crank through a spring shaft, and the other end is used to directly or indirectly drive the rotating shaft system to rotate. One end of the energy storage spring is connected to the rocker arm assembly, and the other end is connected to the spring shaft at the connection of the first link and the crank. It further includes an alarm micro switch and an auxiliary micro switch. When the trip latches with the latch, the rocker arm assembly drives the first link to act through the crank, so that the first link drives the rotating shaft system to rotate. The rotating shaft system drives the moving contact to rotate to conduct and disconnect the main circuit to realize the closing and opening of the circuit breaker. When closing and / or opening, the link mechanism simultaneously triggers the auxiliary micro switch to switch the output state; when the trip and the latch are unlatched, the energy storage spring drives the rotating shaft system to disconnect the main circuit through the link mechanism, and the latching mechanism triggers the alarm micro switch to switch the output state while unlatched.

[0007] Preferably, when the latching mechanism is unlatched, the alarm micro switch is triggered by the latch to switch the output state.

[0008] Preferably, the linkage mechanism is provided with a second link, and the second link is rotatably connected to the first link through a slider shaft. The slider shaft can slide in the slide rail groove. The first link drives the slider shaft to slide and simultaneously drives the rotating shaft system to act through the second link. The slider shaft triggers the auxiliary microswitch to switch the output state during opening and / or closing.

[0009] Preferably, the slide rail groove is arranged on the bracket of the operating mechanism.

[0010] Preferably, the length direction of the slide rail groove is perpendicular to the bottom surface of the molded case circuit breaker.

[0011] Preferably, the alarm microswitch and the auxiliary microswitch are respectively installed on the operating mechanism, and the alarm microswitch and the auxiliary microswitch form a module with the operating mechanism.

[0012] Preferably, there are two transmission mechanisms, namely an auxiliary transmission mechanism and an alarm transmission mechanism. The two transmission mechanisms respectively include a slide rod, a push rod and a reaction spring. The reaction spring is used to drive the slide rod away from the corresponding alarm microswitch and auxiliary microswitch. The operating mechanism is used to drive the push rod to act, so that the push rod drives the slide rod to overcome the action of the reaction spring and trigger the corresponding alarm microswitch and auxiliary microswitch to switch the output state.

[0013] Preferably, the auxiliary transmission mechanism is provided with an auxiliary slide rod as the slide rod, an auxiliary push rod as the push rod and an auxiliary reaction spring as the reaction spring. The linkage mechanism is used to drive the auxiliary push rod to rotate, so that the auxiliary push rod drives the auxiliary slide rod to overcome the action of the auxiliary reaction spring and trigger the auxiliary microswitch to switch the output state.

[0014] Preferably, the alarm transmission mechanism is provided with an alarm slide rod as the slide rod, an alarm push rod as the push rod and an alarm reaction spring as the reaction spring. The buckle mechanism is used to drive the alarm push rod to act, so that the alarm push rod drives the alarm slide rod to overcome the action of the alarm reaction spring and trigger the alarm microswitch to switch the output state.

[0015] Preferably, the alarm transmission mechanism is provided with an alarm lever, and the alarm lever cooperates with the buckle mechanism and the alarm push rod respectively. When the buckle mechanism is tripped, it pushes the alarm lever, so that the alarm lever drives the alarm push rod to trigger the alarm microswitch to switch the output state.

[0016] Preferably, the buckle mechanism includes a re-latch, and the re-latch is respectively rotatably arranged on the bracket. The re-latch is limitedly connected to the lock catch. When the lock catch is tripped, it pushes the alarm lever, so that the alarm lever drives the alarm push rod to trigger the alarm microswitch to switch the output state.

[0017] Preferably, the alarm lever includes an alarm rotating part rotatably mounted on a bracket, and an alarm driving part and an alarm transmission part respectively connected to the alarm rotating part, the alarm driving part cooperates with the lock, and the alarm transmission part is connected to the alarm top rod, and when the lock is disengaged, the alarm driving part pushes the alarm lever to rotate, so that the alarm transmission part drives the alarm top rod to move, and the alarm slide bar moves to trigger the alarm micro switch to switch the output state.

[0018] Preferably, the lock is provided with a lock trigger portion protruding toward the alarm lever, and the lock trigger portion is used to push the alarm drive portion to drive the alarm lever to rotate.

[0019] Preferably, the alarm rotating part is a cylindrical structure, the alarm driving part and the alarm transmission part are respectively arranged on both sides of the radial direction of the alarm rotating part, the alarm transmission part includes an alarm first transmission rotatably connected to the alarm top rod, and an alarm second transmission connected between the alarm first transmission and the alarm rotating part, the alarm second transmission is a U-shaped structure, and an alarm transmission groove is provided in the middle of the alarm second transmission, one side of the lock trigger part is used to push the alarm driving part, and the side of the lock trigger part away from the alarm driving part is inserted into the alarm transmission groove.

[0020] Preferably, the alarm top rod includes an alarm first rod and an alarm second rod arranged on the side of the first alarm rod, and an alarm first through hole and an alarm second through hole are respectively provided at both ends of the first alarm rod, the alarm first through hole is used to be hinged with the alarm lever, the alarm second through hole is oval in shape, and the alarm second through hole is sleeved on the fixed shaft, so that the alarm first rod can move radially relative to the fixed shaft when it rotates around the fixed shaft, and the alarm lever drives the alarm first rod to slide along the alarm second through hole when it is disengaged, and pushes the alarm sliding rod through the alarm second rod, and triggers the alarm micro switch to switch the output state through the alarm sliding rod.

[0021] Preferably, the connecting rod mechanism is provided with a second connecting rod, and the second connecting rod is rotatably connected to the first connecting rod through a slider shaft, the slider shaft can slide in the slide rail groove, the first connecting rod drives the slider shaft to slide and drives the rotating shaft system to move through the second connecting rod, and the slider shaft triggers the auxiliary microswitch to switch the output state when opening and / or closing the switch; the slider shaft and the auxiliary sliding rod are relatively arranged on both sides of the auxiliary push rod, and the auxiliary reaction force spring pushes the auxiliary sliding rod to be pressed on the auxiliary push rod, and makes the auxiliary push rod be pressed on the slider shaft and move with the slider shaft.

[0022] Preferably, the auxiliary push rod comprises an auxiliary rotating part rotatably mounted on a fixed shaft, and an auxiliary top plate connected to the auxiliary rotating part, the auxiliary sliding rod and the slider shaft are relatively arranged on opposite sides of the auxiliary top plate, the auxiliary sliding rod is connected to an auxiliary reaction spring, and the auxiliary reaction spring pushes the auxiliary sliding rod to drive the auxiliary top plate to be pressed against the slider shaft;

[0023] When the slider shaft opens or trips, it pushes the auxiliary top plate to rotate, causing the auxiliary slide rod to overcome the action of the auxiliary reaction spring and trigger the auxiliary microswitch to switch the output state.

[0024] When the slider shaft closes, it moves away from the auxiliary top plate, causing the auxiliary reaction spring to push the auxiliary slide rod to drive the auxiliary top plate to rotate, and triggering the microswitch to switch the output state when the auxiliary slide rod leaves the auxiliary microswitch.

[0025] Preferably, an auxiliary pressing plate is provided on the side of the auxiliary top plate close to the slider shaft, and the auxiliary pressing plate is used to contact the slider shaft so that the slider shaft pushes the auxiliary pressing plate to drive the auxiliary top plate to rotate.

[0026] Preferably, an auxiliary positioning groove is provided on the auxiliary pressing plate, and the auxiliary positioning groove is used for upper limit with the slider shaft.

[0027] Preferably, an auxiliary reinforcing plate is provided on the side of the auxiliary top plate close to the slider shaft, and the auxiliary reinforcing plate is used for contact and cooperation with the slider shaft, and the auxiliary reinforcing plate, the auxiliary pressing plate and the auxiliary top plate are arranged perpendicular to each other.

[0028] Preferably, the thickness of the auxiliary pressing plate is less than the thickness of the auxiliary rotating part. One side edge of the auxiliary pressing plate in the thickness direction is connected to the auxiliary rotating part, and an auxiliary avoidance groove is formed between the other side edge opposite to the auxiliary pressing plate in the thickness direction and the auxiliary pressing plate. The auxiliary avoidance groove is used to avoid the second connecting rod and the slider part connected to the slider shaft.

[0029] Preferably, the auxiliary rotating part is provided with an auxiliary insertion groove for inserting the alarm ejector rod, and auxiliary through holes for passing through the fixed shaft are respectively provided on two opposite side walls of the auxiliary insertion groove; the transmission mechanism further includes an alarm ejector rod, and the alarm ejector rod passes through the auxiliary insertion groove and aligns the alarm second through hole for connecting the fixed shaft with the auxiliary through holes on both side walls. The fixed shaft is used to pass through the two auxiliary through holes and the alarm second through hole, so that the auxiliary ejector rod and the alarm ejector rod are respectively rotatably mounted on the fixed shaft.

[0030] Preferably, the operating mechanism is provided with a fixed shaft, and the ejector rod of the auxiliary transmission mechanism and the ejector rod of the alarm transmission mechanism are respectively rotatably mounted on the fixed shaft.

[0031] Preferably, the link mechanism is provided with a lower link rotatably connected to the second link. When the second link rotates, it drives the lower link to rotate, so that the lower link drives the rotating shaft system to conduct and disconnect the main circuit.

[0032] The molded case circuit breaker of the present invention creates a technical solution that directly triggers the micro switches of the auxiliary contact and the alarm contact through the operating mechanism. The auxiliary contact is triggered through a link mechanism, and the alarm contact is triggered through a buckle mechanism, enabling the auxiliary contact and the alarm contact to be relatively far away from the moving and static contacts and the rotating shaft system, and being arranged close to the operating mechanism, occupying the relatively abundant space at the top of the circuit breaker, making the overall structure more compact.

[0033] In addition, the auxiliary contact and the alarm contact can also form a module with the operating mechanism and be made into a part of the operating mechanism to provide an operating mechanism module with the function of feeding back the opening, closing, and tripping states of the operating mechanism.

[0034] In addition, the operating mechanism triggers the micro switches of the auxiliary contact and the alarm contact through the transmission mechanism, which can trigger the micro switches more reliably.

[0035] Specifically, the crank, the first link, and the slider shaft of the link mechanism of the operating mechanism form a first slider mechanism, ensuring the reliable action performance of the operating mechanism. The auxiliary micro switch is triggered by the slider shaft limited by the slide rail groove, ensuring the reliability of the trigger. Preferably, the moving direction of the slider shaft limited by the slide rail groove is the vertical direction perpendicular to the bottom surface of the circuit breaker.

[0036] In addition, the alarm ejector rod passes through the auxiliary insertion groove and aligns the alarm second through hole for connecting the fixed shaft with the auxiliary through holes on both side walls. The fixed shaft is used to pass through the two auxiliary through holes and the alarm second through hole, enabling the auxiliary ejector rod and the alarm ejector rod to be rotatably installed on the fixed shaft respectively, with the characteristics of a compact structure and being able to reduce the volume of the device. Description of the Drawings

[0037] Figure 1 is a schematic structural diagram of the molded case circuit breaker of the present invention;

[0038] Figure 2 is a schematic structural diagram of the operating mechanism of the present invention;

[0039] Figure 3 is a schematic diagram of the cooperation between the alarm transmission mechanism and the auxiliary transmission mechanism of the present invention;

[0040] Figure 4 is the present invention Figure 3 from another angle;

[0041] Figure 5 is a schematic structural diagram of the auxiliary micro switch of the present invention;

[0042] Figure 6 is a schematic structural diagram of the alarm lever of the present invention;

[0043] Figure 7 is a schematic structural diagram of the alarm ejector rod of the present invention;

[0044] Figure 8 is a schematic structural view of the auxiliary ejector rod of the present invention;

[0045] Figure 9 is a schematic structural view of the lower transmission mechanism in the opening state and under tripping of the present invention;

[0046] Figure 10 is a schematic view of the cooperation between the lower transmission mechanism in the opening state and under tripping of the present invention and the microswitch;

[0047] Figure 11 is a schematic structural view of the lower transmission mechanism in the closing state of the present invention;

[0048] Figure 12 is a schematic view of the cooperation between the lower transmission mechanism in the closing state of the present invention and the microswitch;

[0049] In the figure, 101, rotating shaft system; 102, operating mechanism; 103, transmission mechanism; 104, microswitch; 1, bracket; 3, rocker arm assembly; 4, energy storage spring; 5, handle; 6, trip latch; 7, lock latch; 8, re-latch; 9, crank; 10, first connecting rod; 11, slider member; 12, second connecting rod; 13, lower connecting rod; 1-0, slide rail groove; 14, alarm lever; 15, alarm ejector rod; 16, auxiliary ejector rod; 18, slider shaft; 1031, auxiliary reaction spring; 1041, auxiliary microswitch; 1051, auxiliary slide rod; 1052, alarm slide rod; 14-1, alarm rotating part; 14-2, alarm driving part; 14-3, alarm transmission part; 14-4, alarm first transmission; 14-5, alarm second transmission; 14-6, alarm transmission groove; 14-7, alarm boss; 15-0, alarm first rod; 15-1, alarm first through hole; 15-2, alarm second rod; 15-3, alarm second through hole; 16-1, auxiliary rotating part; 16-2, auxiliary positioning groove; 16-3, auxiliary top plate; 16-4, auxiliary pressure plate; 16-5, auxiliary reinforcing plate; 16-6, auxiliary avoidance groove; 16-7, auxiliary insertion groove; 16-8, auxiliary through hole; 11-0, slider groove; 7-0, lock latch trigger part; 2S, second shaft; 3S, third shaft; 4S, fixed shaft. Detailed implementation manners

[0050] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the molded case circuit breaker of the present invention. The molded case circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0051] As Figure 1-2As shown in the figure, the molded case circuit breaker of this embodiment includes a rotating shaft system 101, an operating mechanism 102, and a fault protection mechanism. At least one moving contact is provided on the rotating shaft system 101. The operating mechanism 102 is used to drive the rotating shaft system 101 to rotate around the seventh axis 7S. The rotating shaft system 101 drives the moving contact to contact or separate from the corresponding static contact, conduct and disconnect the main circuit, and realize closing and opening of the main circuit. The fault protection mechanism includes one or more of a thermal magnetic release, a short-circuit electromagnetic release, an overload release, or a leakage release, etc. When a fault occurs in the main circuit, the fault protection mechanism drives the operating mechanism 102 to trip, and the operating mechanism 102 drives the rotating shaft system 101 to disconnect the main circuit to realize the protection function.

[0052] The operating mechanism of the molded case circuit breaker generally includes a bracket, a energy storage spring 4, a rocker arm assembly 3, a latching mechanism, and a link mechanism. The rocker arm assembly 3 is rotatably installed on the bracket and connected to the handle 5. The latching mechanism includes a latch 7 and a tripping latch 6 connected by latching. The latch 7 and the tripping latch 6 are respectively rotatably installed on the bracket. The link mechanism includes a crank 9 and a first link 10. The crank 9 is rotatably installed on the tripping latch 6 through a first shaft and can rotate around the first shaft as the rotation center. One end of the first link 10 is rotatably connected to the crank 9 through a spring shaft, and the other end is used to directly or indirectly drive the rotating shaft system 101 to rotate. One end of the energy storage spring 4 is connected to the rocker arm assembly 3, and the other end is connected to the spring shaft at the connection of the first link 10 and the crank 9. The latched latch 7 and tripping latch 6 limit the rotation position of the crank 9. By driving the rocker arm assembly 3 to swing through the handle 5, the rocker arm assembly 3 drives the link mechanism to act, and then drives the rotating shaft system 101 to rotate. The rotating shaft system 101 drives the moving contact to rotate to conduct and disconnect the main circuit, realizing closing and opening of the circuit breaker. When the circuit breaker is in the closed state, when a fault occurs in the main circuit, the fault protection mechanism drives the latch 7 and the tripping latch 6 to release the latching cooperation, causing the operating mechanism to trip. The tripping latch 6 cannot limit the position of the crank 9. The energy storage spring 4 releases energy and drives the rotating shaft system 101 to rotate through the link mechanism. The rotating shaft system 101 drives the moving contact to rotate to disconnect the main circuit, realizing tripping and opening protection. This is the prior art in this field.

[0053] One improvement of the circuit breaker in this embodiment is that it is also provided with an auxiliary microswitch 1041 and an alarm microswitch. When the operating mechanism trips and / or closes, the link mechanism triggers the auxiliary microswitch 1041 to switch the output state to output the tripping or closing state of the circuit breaker. When the operating mechanism trips, the latching mechanism triggers the alarm microswitch to output the tripping state of the circuit breaker. It should be noted that the link mechanism that triggers the auxiliary microswitch 1041 can be the crank 9, the first link 10, or other links connected between the first link 10 and the rotating shaft system 101. It can also be the spring shaft connecting the first link 10 and the crank 9, or the connecting shaft between other links. They can directly or indirectly drive the auxiliary microswitch 1041; the latching mechanism that triggers the alarm microswitch can be the latch 7 or the trip 6, or other components of the latching mechanism. They can directly or indirectly drive the alarm microswitch.

[0054] The circuit breaker in this embodiment is provided with two of the microswitches 104, and two transmission mechanisms 103 are respectively arranged corresponding to the two microswitches 104. The two microswitches 104 are respectively an auxiliary microswitch 1041 and an alarm microswitch, and the two transmission mechanisms 103 are respectively an auxiliary transmission mechanism and an alarm transmission mechanism;

[0055] The auxiliary microswitch 1041 and the auxiliary transmission mechanism constitute an auxiliary contact mechanism. The auxiliary contact mechanism is used to output the on and off states of the main circuit. When the operating mechanism 102 closes and trips, the link mechanism triggers the auxiliary microswitch 1041 to switch the output state through the auxiliary transmission mechanism to realize functions such as automatic control;

[0056] The alarm microswitch and the alarm transmission mechanism constitute an alarm contact mechanism. The alarm contact mechanism is used to output the fault state of the main circuit. When the operating mechanism 102 trips, the trip 6 and the latch 7 are disengaged. The energy storage spring 4 drives the rotating shaft system 101 to rotate through the link mechanism. The rotating shaft system 101 drives the moving contact to disconnect the main circuit. At the same time, the latching mechanism triggers the alarm microswitch to switch the output state through the alarm transmission mechanism to realize the protection function for the line and equipment.

[0057] It can be understood that the number of microswitches 104 can also be increased to output multiple signals for different purposes. The number of microswitches 104 corresponding to a single transmission mechanism 103 can also be increased so that the transmission mechanism 103 triggers multiple microswitches 104 at the same time. For example, the auxiliary contact mechanism outputs multiple signals at the same time, which all belong to the protection scope of this invention.

[0058] The transmission mechanism 103 of this embodiment includes a slide bar, a push rod, and a reaction spring. The operating mechanism 102 is used to drive the push rod to act, so that the push rod drives the slide bar to move, overcoming the action of the reaction spring to trigger the microswitch 104 to switch the output state. The push rod can be rotatably arranged or slidably arranged.

[0059] As Figure 10 shown, the auxiliary transmission mechanism and the alarm transmission mechanism are respectively provided with an auxiliary slide bar 1051 and an alarm slide bar 1052 as the slide bars, an auxiliary push rod 16 and an alarm push rod 15 as the push rods, and an auxiliary reaction spring 1031 and an alarm reaction spring as the reaction springs respectively. The operating mechanism 102 is provided with a fixed shaft 4S. The auxiliary push rod 16 and the alarm push rod 15 are respectively rotatably arranged on the fixed shaft 4S. The operating mechanism 102 can respectively drive the auxiliary push rod 16 and the alarm push rod 15 to rotate around the fixed shaft 4S, and respectively push the auxiliary slide bar 1051 and the alarm slide bar 1052, so that the auxiliary slide bar 1051 and the alarm slide bar 1052 respectively overcome the action of their corresponding reaction springs and trigger the contacts of the auxiliary microswitch 1041 and the alarm microswitch. The two output states of the microswitch 104 are respectively a signal-on state and a signal-off state.

[0060] In this embodiment, the alarm microswitch and the auxiliary microswitch 1041 are installed in the circuit breaker housing. Preferably, the alarm microswitch and the auxiliary microswitch 1041 are respectively installed on the operating mechanism, such as installed on a bracket or the mechanism housing of the operating mechanism. The alarm microswitch and the auxiliary microswitch 1041 form a module with the operating mechanism, providing an operating mechanism module with the function of feedbacking the opening, closing, and tripping states of the operating mechanism. The operating mechanism module is installed as a whole into the circuit breaker housing.

[0061] As Figure 2As shown in the figure, a preferred embodiment of an operating mechanism, the buckle mechanism includes a latch 7, a toggle 6, and a re-latch 8. The latch 7, the toggle 6, and the re-latch 8 are respectively rotatably arranged on a bracket 1. The latch 7 is latched to the toggle 6, and the re-latch 8 is in a limiting connection with the latch 7. The fault protection mechanism drives the re-latch 8 to rotate, so that the re-latch 8 is disengaged from the limiting cooperation with the latch 7, and then the latch 7 is disengaged from the latching connection with the toggle 6, causing the operating mechanism to trip. When the latch 7 is latched to the toggle 6, it can limit the toggle 6, enabling the crank 9 to rotate with the toggle 6 as the rotation center. The alarm transmission mechanism is provided with an alarm lever 14 that cooperates with the latch 7 and the alarm push rod 15 respectively. When the latch 7 trips, it rotates away from the toggle 6 and pushes the alarm lever 14, causing the alarm lever 14 to drive the alarm push rod 15 to rotate to trigger the alarm microswitch. Of course, the alarm microswitch can also be triggered by the toggle 6 or other parts, but triggering by the latch 7 is more conducive to saving space. The toggle 6 is located between the latch 7 and the slider shaft 18, and the toggle 6 is closer to the slider shaft 18 relative to the latch 7. The toggle 6 or other parts are too close to the slider shaft 18, which is not conducive to the layout of the microswitch. The latch 7 is at the rear end, which can save space for the auxiliary microswitch 1041. With such a structure, 3 auxiliary microswitches and 1 alarm microswitch can be arranged.

[0062] As Figure 2 As shown in the figure, the link mechanism includes a crank 9, a first link 10, a second link 12, and a lower link 13. The toggle 6 is rotatably connected to the crank 9 through a first shaft. One end of the first link 10 is hinged to the crank 9 through a spring shaft. The first link 10 and the second link 12 are rotatably connected through a slider shaft 18, and the slider shaft 18 can slide in the slide rail groove 1-0. The second link 12 is connected to the lower link 13, and the lower link 13 is rotatably installed on the fifth shaft 5S and connected to the rotating shaft system 101. When the operating handle 5 drives the operating mechanism to perform opening and closing operations, the handle 5 drives the rocker arm assembly 3, the rocker arm assembly 3 drives the crank 9 and the first link 10 to rotate, the first link 10 drives the slider shaft 18 to slide and at the same time drives the second link 12 to rotate through the slider shaft 18. When the second link 12 rotates, it drives the lower link 13 to rotate, causing the lower link 13 to drive the rotating shaft system 101 to conduct and disconnect the main circuit. At the same time, the sliding slider shaft 18 triggers the auxiliary microswitch 1041 to switch the output state during opening and / or closing to output the opening or closing state of the circuit breaker.

[0063] The crank 9, the first connecting rod 10, and the slider shaft 18 of the connecting rod mechanism of the operating mechanism in this embodiment form a first slider mechanism, ensuring the reliable operating performance of the operating mechanism. The auxiliary microswitch 1041 is triggered by the slider shaft 18 limited by the slide rail groove 1-0, ensuring the reliability of the trigger. Preferably, the moving direction of the slider shaft 18 limited by the slide rail groove 1-0 is the vertical direction perpendicular to the bottom surface of the circuit breaker. As another deteriorated embodiment, it is also possible that the first connecting rod 10 and the second connecting rod 12 are hinged through a rotating shaft and the rotating shaft cannot slide, which belongs to the protection scope of this invention.

[0064] Specifically, the slider shaft 18 and the auxiliary slide rod 1051 in this embodiment are relatively arranged on both sides of the auxiliary ejector rod 16. The auxiliary reaction spring 1031 pushes the auxiliary slide rod 1051 to press against the auxiliary ejector rod 16, and makes the auxiliary ejector rod 16 press against the slider shaft 18 and move with the slider shaft 18. When the first connecting rod 10 drives the second connecting rod 12 to rotate through the slider shaft 18, the slider shaft 18 can push the auxiliary ejector rod 16, so that the auxiliary slide rod 1051 overcomes the action of the auxiliary reaction spring 1031 to trigger the auxiliary microswitch 1041. It can be understood that the connecting rod mechanism can also trigger the auxiliary microswitch 1041 through other parts. For example, convex platforms are provided on the second connecting rod 12 and the lower connecting rod 13 to trigger the auxiliary microswitch 1041, which all belong to the protection scope of this invention.

[0065] As Figure 6 shown, a second shaft 2S is provided on the bracket 1. The alarm lever 14 includes an alarm rotating part 14-1 rotatably installed on the second shaft 2S, and an alarm driving part 14-2 and an alarm transmission part 14-3 respectively connected to the alarm rotating part 14-1. The alarm driving part 14-2 cooperates with the lock catch 7, and the alarm transmission part 14-3 is rotatably connected to the alarm ejector rod 15. When the lock catch 7 is tripped, it pushes the alarm driving part 14-2 to drive the alarm lever 14 to rotate, so that the moving alarm transmission part 14-3 drives the alarm ejector rod 15 to rotate around the fixed shaft 4S, and then drives the alarm slide rod 1052 to move through the alarm ejector rod 15 to trigger the alarm microswitch.

[0066] Specifically, the alarm rotating part 14-1 is of a cylindrical structure. The alarm driving part 14-2 and the alarm transmission part 14-3 are respectively arranged on two sides in the radial direction of the alarm rotating part 14-1. The alarm transmission part 14-3 includes an alarm first transmission 14-4 rotatably connected to the alarm ejector rod 15, and an alarm second transmission 14-5 connected between the alarm first transmission 14-4 and the alarm rotating part 14-1. The alarm second transmission 14-5 is of a U-shaped structure, and an alarm transmission groove 14-6 is provided in the middle of the alarm second transmission 14-5. The latch 7 is rotatably installed on the second shaft 2S. The latch 7 is provided with a latch trigger part 7-0 protruding towards the alarm lever 14. One side of the top of the latch trigger part 7-0 is used to push the alarm driving part 14-2, and one side of the bottom of the latch trigger part 7-0, that is, the side away from the alarm driving part 14-2, is inserted into the alarm transmission groove 14-6.

[0067] For the alarm lever 14 in this embodiment, by providing the alarm transmission groove 14-6 in the alarm second transmission 14-5, it can avoid the latch trigger part 7-0, and at the same time make the extension line of the alarm first transmission 14-4 located at the rotation center of the alarm lever 14, that is, on the alarm rotating part 14-1, preventing the extension piece of the alarm first transmission 14-4 from deviating too far from the rotation center after the alarm transmission groove 14-6 is not provided, which not only causes the alarm lever 14 to have a large volume and occupy a large space during movement, but also causes the same problems for other parts.

[0068] It can be understood that the alarm lever 14 can also adopt other shapes, or without changing the shape of the alarm lever 14, but by adjusting the shape of the latch trigger part 7-0, for example, providing an avoidance groove for avoiding the alarm transmission part 14-3 on the latch trigger part 7-0, so that the alarm first transmission 14-4 can be directly extended to be connected to the alarm rotating part 14-1, the latch trigger part 7-0 does not interfere with the alarm transmission part 14-3, and the alarm transmission part 14-3 can not be provided with the alarm transmission groove 14-6, which all belong to the protection scope of this invention.

[0069] Such as Figure 7As shown, the alarm ejector rod 15 includes an alarm first rod 15-0 and an alarm second rod 15-2 arranged on the side of the alarm first rod 15-0. Alarm first through holes 15-1 and an alarm second through hole 15-3 are respectively provided at both ends of the alarm first rod 15-0. The alarm first through hole 15-1 is used for hinged connection with the alarm lever 14. The alarm second through hole 15-3 is waist-shaped. The alarm second through hole 15-3 is sleeved on the fixed shaft 4S, so that when the alarm first rod 15-0 rotates around the fixed shaft 4S, it can move radially relative to the fixed shaft 4S. The alarm first transmission 14-4 is provided with an alarm boss 14-7. The alarm boss 14-7 is used to pass through the alarm first through hole 15-1, so that the alarm first rod 15-0 is rotationally connected with the alarm first transmission 14-4. Of course, the alarm first transmission 14-4 can also be provided with a through hole to be connected with the alarm first through hole 15-1 through a rotating shaft. When the latch 7 is tripped, the alarm lever 14 drives the alarm first rod 15-0 to slide along the alarm second through hole 15-3 and / or slightly rotate around the fixed shaft 4S, and pushes the alarm slide rod 1052 upward through the alarm second rod 15-2 on its side, and triggers the alarm micro switch through the alarm slide rod 1052.

[0070] As Figure 8 shown, the auxiliary ejector rod 16 includes an auxiliary rotating part 16-1 rotatably installed on the fixed shaft 4S, and an auxiliary top plate 16-3 connected to the auxiliary rotating part 16-1. The auxiliary slide rod 1051 and the slider shaft 18 are relatively arranged on opposite sides of the auxiliary top plate 16-3. The auxiliary slide rod 1051 is connected to the auxiliary reaction spring 1031. The auxiliary reaction spring 1031 pushes the auxiliary slide rod 1051 to drive the auxiliary top plate 16-3 to press tightly on the slider shaft 18, so that the auxiliary top plate 16-3 moves along with the slider shaft 18;

[0071] During opening or tripping, the operating mechanism 102 drives the rotating shaft system 101 to disconnect the main circuit through the slider shaft 18. The slider shaft 18 moves upward and pushes the auxiliary top plate 16-3 to rotate upward, so that the auxiliary slide rod 1051 overcomes the action of the auxiliary reaction spring 1031 to trigger the auxiliary micro switch 1041 to switch the output state, which is used to indicate the opening state;

[0072] During closing, the operating mechanism 102 drives the rotating shaft system 101 to conduct the main circuit through the slider shaft 18. The slider shaft 18 moves downward and moves away from the auxiliary top plate 16-3, so that the auxiliary reaction spring 1031 pushes the auxiliary slide rod 1051 to drive the auxiliary top plate 16-3 to rotate downward, and triggers the micro switch 104 to switch the output state when the auxiliary slide rod 1051 leaves the auxiliary micro switch 1041, which is used to indicate the closing state.

[0073] Furthermore, an auxiliary pressing plate 16-4 is provided on the side of the auxiliary top plate 16-3 close to the slider shaft 18. The auxiliary pressing plate 16-4 is used to contact the slider shaft 18 instead of the auxiliary top plate 16-3, so that the slider shaft 18 pushes the auxiliary pressing plate 16-4 to drive the auxiliary top plate 16-3 to rotate. An auxiliary positioning groove 16-2 is provided on the auxiliary pressing plate 16-4. When the auxiliary pressing plate 16-4 contacts the slider shaft 18, the auxiliary positioning groove 16-2 is used to be stuck on the slider shaft 18 for limiting.

[0074] Furthermore, an auxiliary reinforcing plate 16-5 is provided on the side of the auxiliary top plate 16-3 close to the slider shaft 18. The auxiliary reinforcing plate 16-5 is used for contact and cooperation with the slider shaft 18. The auxiliary reinforcing plate 16-5, the auxiliary pressing plate 16-4 and the auxiliary top plate 16-3 are perpendicularly arranged. The auxiliary reinforcing plate 16-5 can not only play a role in supporting the auxiliary ejector rod 16, improving the strength of the part, but also contact the slider shaft 18 to share the acting force when contacting the slider shaft 18, avoiding local damage of the auxiliary ejector rod 16 due to force.

[0075] Furthermore, the thickness of the auxiliary pressing plate 16-4 is less than that of the auxiliary rotating part 16-1. The auxiliary pressing plate 16-4 is connected to one of the side edges in the thickness direction of the auxiliary rotating part 16-1. An auxiliary avoidance groove 16-6 is formed between the other side edge opposite to the auxiliary pressing plate 16-4 in the thickness direction of the auxiliary pressing plate 16-4 and the auxiliary pressing plate 16-4. The auxiliary avoidance groove 16-6 is used to avoid the second connecting rod 12 and the slider part 11 connected to the slider shaft 18.

[0076] Furthermore, an auxiliary insertion groove 16-7 for inserting the alarm ejector rod 15 is provided on the auxiliary rotating part 16-1. Auxiliary through holes 16-8 for passing through the fixed shaft 4S are respectively provided on two opposite side walls of the auxiliary insertion groove 16-7. The alarm ejector rod 15 passes through the auxiliary insertion groove 16-7 and aligns the alarm second through hole 15-3 for connecting the fixed shaft 4S with the auxiliary through holes 16-8 on both side walls. The fixed shaft 4S is used to pass through the two auxiliary through holes 16-8 and the alarm second through hole 15-3, so that the auxiliary ejector rod 16 and the alarm ejector rod 15 are respectively rotatably mounted on the fixed shaft 4S, having the characteristics of compact structure and being able to reduce the volume of the device. Of course, the auxiliary insertion groove 16-7 may not be provided, and the alarm ejector rod 15 may also be provided outside the auxiliary ejector rod 16, which all belong to the protection scope of the present invention.

[0077] As Figure 2-4As shown, a slide rail groove 1-0 that slidably cooperates with a slide block shaft 18 is provided on the bracket 1. A cylindrical slide block member 11 is provided on the slide block shaft 18. The slide block shaft 18 slidably cooperates with the slide rail groove 1-0 through the slide block member 11. A slide rail groove 1-0 that slidably cooperates with the slide block member 11 is provided on the bracket 1. Slide block grooves 11-0 are respectively provided on two radially opposite sides of the slide block member 11. The slide block grooves 11-0 on both sides of the slide block member 11 are respectively stuck on two opposite side walls of the slide rail groove 1-0. The slide rail groove 1-0 can limit the slide block member 11 from moving left and right, enabling the slide block member 11 to only slide up and down along the slide rail groove 1-0. The slide block shaft 18 is fixedly connected to a second connecting rod 12. One end of the second connecting rod 12 away from the slide block shaft 18 is rotatably connected to a lower connecting rod 13. The lower connecting rod 13 rotates around a fifth shaft 5S on the bracket 1. The lower connecting rod 13 is used to drive a rotating shaft system 101 to act. While the slide block shaft 18 drives the lower connecting rod 13 to rotate, it also pushes an auxiliary ejector rod 16 to rotate.

[0078] Preferably, the length direction of the slide rail groove 1-0 is perpendicular to the bottom surface of the plastic case circuit breaker. The movement direction of the slide block shaft 18 is parallel to the movement direction of the ejector rod, which can make the cooperation between the ejector rod and the slide block shaft 18 more reliable. It can be understood that the slide block member 11 may not be provided, and the slide rail groove 1-0 can also be used to insert the slide block shaft 18 and directly slidably cooperate with the slide block shaft 18 to enable the slide block shaft 18 to move along the direction of the slide rail groove 1-0. In addition, the slide rail groove 1-0 can also be provided on other parts outside the bracket 1. For example, a guiding plate independent of the bracket 1 is provided. The guiding plate is installed on the bracket 1 or the housing, and the slide rail groove 1-0 is provided on the guiding plate, which all fall within the protection scope of the present invention.

[0079] As Figure 9-10 shown, when the operating mechanism 102 is in the free tripping state, the locking trigger portion 7-0 of the lock 7 and the alarm driving portion 14-2 of the alarm lever 14 are in contact and limited by force. The alarm second transmission 14-5 of the alarm ejector rod 15 is in contact and stressed with the alarm slide rod 1052. When the mechanism starts to trip from the closing state and changes to the free tripping process, the alarm slide rod 1052 moves upward against the reaction spring, causing the alarm slide rod 1052 to contact the alarm microswitch contact foot and switch the alarm contact signal to the on state.

[0080] When the product mechanism is in the free tripping state, the slider is at the top position of the slide rail groove 1-0. The auxiliary rotating part 16-1 of the auxiliary ejector rod 16 rotates around the fixed shaft 4S, and the auxiliary positioning groove 16-2 of the auxiliary ejector rod 16 is in limit contact and cooperation with the slider shaft 18. The auxiliary top plate 16-3 of the auxiliary ejector rod 16 contacts the auxiliary slide rod 1051. By design, when the product is in the free tripping position, the auxiliary ejector rod 16 applies an upward thrust to the auxiliary slide rod 1051, and the auxiliary slide rod 1051 overcomes the auxiliary reaction spring 1031 and moves upward to contact the contact foot of the auxiliary microswitch 1041, thereby realizing the signal connection state of the auxiliary contact.

[0081] As Figure 11-12 In the closing state shown, a closing thrust is applied to the handle 5, driving the rocker arm assembly 3 to rotate counterclockwise around the second shaft 2S until the energy storage spring 4 passes through the closing dead point. The operating mechanism 102 drives the rotating shaft system 101 through the link mechanism to complete the contact and cooperation between the moving and static contacts, thereby completing the product closing process. At this time, the tripping latch 6 is limited by the locking latch 7, and the locking latch 7 is limited by the reclosing latch 8. Since the locking latch 7 receives the reclosing latch 8 force from the tripping latch 6, it rotates clockwise around the third shaft 3S. Since the alarm lever 14 is in limit cooperation with the locking latch 7, when the locking latch 7 rotates clockwise, the locking latch 7 separates from the alarm driving part 14-2 of the alarm lever 14 and there is no force between them. However, since the alarm lever 14 is connected and cooperated with the alarm ejector rod 15, the alarm second transmission 14-5 of the alarm ejector rod 15 is in force contact with the alarm slide rod 1052. When the mechanism closes, it drives the alarm ejector rod 15 to move approximately downward along the alarm second through hole 15-3, thereby realizing the switching process of the alarm slide rod 1052 from the connected state to the disconnected state with the contact foot of the alarm microswitch.

[0082] During the action process of the product from the free tripping state to the closing state, the product mechanism closing is realized by relying on the movement of the mechanism crank 9 and the slider and the cooperation of each connecting rod. At this time, the slider moves downward along the slide rail groove 1-0 of the bracket 1 from the initial top position. The slider contacts the auxiliary slide rod 1051 and rotates downward and clockwise around the fixed shaft 4S as the slider moves up and down. The auxiliary positioning groove 16-2 of the auxiliary slide rod 1051 and the auxiliary slide rod 1051 of the auxiliary contact are converted from the force contact during opening to the non-force contact during closing. Finally, the auxiliary slide rod 1051 slides downward to the initial position under the action of the auxiliary contact reaction spring, and at this time, the contact foot of the auxiliary contact microswitch 104 is converted from the connected state to the disconnected state.

[0083] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0084] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is limited only to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A molded case circuit breaker, comprising a rotating shaft system (101) and an operating mechanism (102), wherein the operating mechanism (102) comprises a bracket, a rocker assembly (3), an energy storage spring (4), a buckle mechanism and a connecting rod mechanism, the rotating shaft system (101) is provided with at least one moving contact, the connecting rod mechanism comprises a crank (9) and a first connecting rod (10), the rocker assembly (3) is rotatably mounted on the bracket, the buckle mechanism comprises a buckle-connected lock buckle (7) and a trip buckle (6), the lock buckle (7) and the trip buckle (6) are respectively rotatably mounted on the bracket, the crank (9) is rotatably mounted on the trip buckle (6) via a first shaft, one end of the first connecting rod (10) is rotatably connected to the crank (9) via a spring shaft, and the other end is used to directly or indirectly drive the rotating shaft system (101) to rotate, one end of the energy storage spring (4) is connected to the rocker assembly (3), and the other end is connected to the spring shaft at the connection between the first connecting rod (10) and the crank (9); characterized in that: It also includes an alarm micro switch and an auxiliary micro switch (1041). When the trip button (6) and the lock button (7) are locked, the rocker arm assembly (3) drives the first connecting rod (10) to move through the crank (9), so that the first connecting rod (10) drives the rotating shaft system (101) to rotate, and the rotating shaft system (101) drives the moving contact to rotate to connect and disconnect the main circuit to achieve the closing and opening of the circuit breaker. When closing and / or opening, the connecting rod mechanism simultaneously triggers the auxiliary micro switch (1041) to switch the output state; when the trip button (6) and the lock button (7) are released, the energy storage spring (4) drives the rotating shaft system (101) to disconnect the main circuit through the connecting rod mechanism, and the locking mechanism triggers the alarm micro switch to switch the output state when it is released.

2. The molded case circuit breaker according to claim 1, characterized in that: When the buckle mechanism is released, the alarm micro switch is triggered by the lock buckle (7) to switch the output state.

3. The molded case circuit breaker according to claim 1, characterized in that: The connecting rod mechanism is provided with a second connecting rod (12), and the second connecting rod (12) is rotatably connected to the first connecting rod (10) via a slider shaft (18). The slider shaft (18) can slide in the slide rail groove (1-0). The first connecting rod (10) drives the slider shaft (18) to slide and drives the rotating shaft system (101) to move through the second connecting rod (12). The slider shaft (18) triggers the auxiliary micro switch (1041) to switch the output state when opening and / or closing the switch.

4. The molded case circuit breaker according to claim 3, characterized in that: The slide rail groove (1-0) is arranged on a bracket of the operating mechanism.

5. The molded case circuit breaker according to claim 3, characterized in that: The length direction of the slide rail groove (1-0) is arranged perpendicular to the bottom surface of the molded case circuit breaker.

6. The molded case circuit breaker according to claim 1, characterized in that: The alarm micro switch and the auxiliary micro switch (1041) are respectively mounted on the operating mechanism (102); the alarm micro switch and the auxiliary micro switch (1041) and the operating mechanism form a module.

7. The molded case circuit breaker according to claim 1, characterized in that: Two transmission mechanisms (103) are provided, the two transmission mechanisms (103) are respectively an auxiliary transmission mechanism and an alarm transmission mechanism, the two transmission mechanisms (103) respectively include a slide bar, a push rod and a reaction spring, the reaction spring is used to drive the slide bar away from the corresponding alarm micro switch and the auxiliary micro switch (1041), and the operating mechanism is used to drive the push rod to move, so that the push rod drives the slide bar to overcome the action of the reaction spring and trigger the corresponding alarm micro switch and the auxiliary micro switch (1041) to switch the output state.

8. The molded case circuit breaker according to claim 7, characterized in that: The auxiliary transmission mechanism is provided with an auxiliary sliding rod (1051) as a sliding rod, an auxiliary push rod (16) as a push rod, and an auxiliary reaction spring (1031) as a reaction spring. The connecting rod mechanism is used to drive the auxiliary push rod (16) to rotate, so that the auxiliary push rod (16) drives the auxiliary sliding rod (1051) to overcome the action of the auxiliary reaction spring (1031) and trigger the auxiliary micro switch (1041) to switch the output state.

9. The molded case circuit breaker according to claim 7, characterized in that: The alarm transmission mechanism is provided with an alarm sliding bar (1052) as a sliding bar, an alarm top bar (15) as a top bar, and an alarm reaction spring as a reaction spring. The buckle mechanism is used to drive the alarm top bar (15) to move, so that the alarm top bar (15) drives the alarm sliding bar (1052) to overcome the action of the alarm reaction spring and trigger the alarm micro switch to switch the output state.

10. The molded case circuit breaker according to claim 9, characterized in that: The alarm transmission mechanism is provided with an alarm lever (14), and the alarm lever (14) cooperates with the buckle mechanism and the alarm top rod (15) respectively. When the buckle mechanism is released, it pushes the alarm lever (14), so that the alarm lever (14) drives the alarm top rod (15) to trigger the alarm micro switch to switch the output state.

11. The molded case circuit breaker according to claim 10, characterized in that: The buckle mechanism comprises a buckle (8), which is rotatably arranged on the bracket (1) and is limitedly connected to the lock buckle (7). When the lock buckle (7) is released, it pushes the alarm lever (14), so that the alarm lever (14) drives the alarm top rod (15) to trigger the alarm micro switch to switch the output state.

12. The molded case circuit breaker according to claim 11, characterized in that: The alarm lever (14) comprises an alarm rotating part (14-1) rotatably mounted on a bracket (1), and an alarm driving part (14-2) and an alarm transmission part (14-3) respectively connected to the alarm rotating part (14-1); the alarm driving part (14-2) cooperates with a lock buckle (7), and the alarm transmission part (14-3) is connected to an alarm top rod (15); when the lock buckle (7) is released, it pushes the alarm driving part (14-2) to drive the alarm lever (14) to rotate, so that the alarm transmission part (14-3) drives the alarm top rod (15) to move, and the alarm slide bar (1052) moves to trigger the alarm micro switch to switch the output state.

13. The molded case circuit breaker according to claim 12, characterized in that: The lock buckle (7) is provided with a lock buckle triggering portion (7-0) protruding toward the alarm lever (14), and the lock buckle triggering portion (7-0) is used to push the alarm driving portion (14-2) to drive the alarm lever (14) to rotate.

14. The molded case circuit breaker according to claim 13, characterized in that: The alarm rotating part (14-1) is a cylindrical structure, the alarm driving part (14-2) and the alarm transmission part (14-3) are respectively arranged on both sides of the alarm rotating part (14-1) in a radial direction, the alarm transmission part (14-3) comprises an alarm first transmission (14-4) rotatably connected to the alarm top rod (15), and an alarm second transmission (14-5) connected between the alarm first transmission (14-4) and the alarm rotating part (14-1), the alarm second transmission (14-5) is a U-shaped structure, and an alarm transmission groove (14-6) is provided in the middle of the alarm second transmission (14-5), one side of the lock trigger part (7-0) is used to push the alarm driving part (14-2), and the side of the lock trigger part (7-0) away from the alarm driving part (14-2) is inserted into the alarm transmission groove (14-6).

15. The molded case circuit breaker according to claim 11, characterized in that: The alarm top rod (15) comprises an alarm first rod (15-0) and an alarm second rod (15-2) arranged on the side of the alarm first rod (15-0); the first alarm through hole (15-1) and the second alarm through hole (15-3) are respectively arranged at both ends of the alarm first rod (15-0); the alarm first through hole (15-1) is used for being hinged with the alarm lever (14); the alarm second through hole (15-3) is oval in shape; the alarm second through hole (15-3) is sleeved on the fixed shaft (4S) so that the alarm first rod (15-0) can move radially relative to the fixed shaft (4S) when rotating around the fixed shaft (4S); the alarm lever (14) drives the alarm first rod (15-0) to slide along the alarm second through hole (15-3) when tripping, and pushes the alarm sliding rod (1052) through the alarm second rod (15-2); and the alarm micro switch is triggered by the alarm sliding rod (1052) to switch the output state.

16. The molded case circuit breaker according to claim 8, characterized in that: The connecting rod mechanism is provided with a second connecting rod (12), and the second connecting rod (12) is rotatably connected to the first connecting rod (10) via a slider shaft (18). The slider shaft (18) can slide in the slide rail groove (1-0), and the first connecting rod (10) drives the slider shaft (18) to slide and drives the rotating shaft system (101) to move through the second connecting rod (12). The slider shaft (18) triggers the auxiliary micro switch (1041) to switch the output state when opening and / or closing the switch; the slider shaft (18) and the auxiliary sliding rod (1051) are arranged on both sides of the auxiliary push rod (16) relative to each other, and the auxiliary reaction force spring (1031) pushes the auxiliary sliding rod (1051) to be pressed against the auxiliary push rod (16), and makes the auxiliary push rod (16) pressed against the slider shaft (18) and move with the slider shaft (18).

17. The molded case circuit breaker according to claim 16, characterized in that: The auxiliary top rod (16) comprises an auxiliary rotating part (16-1) rotatably mounted on a fixed shaft (4S), and an auxiliary top plate (16-3) connected to the auxiliary rotating part (16-1); an auxiliary sliding rod (1051) and a slider shaft (18) are relatively arranged on two opposite sides of the auxiliary top plate (16-3); the auxiliary sliding rod (1051) is connected to an auxiliary reaction force spring (1031); the auxiliary reaction force spring (1031) pushes the auxiliary sliding rod (1051) to drive the auxiliary top plate (16-3) to be pressed against the slider shaft (18); The slider shaft (18) pushes the auxiliary top plate (16-3) to rotate when the gate is opened or tripped, so that the auxiliary slide bar (1051) overcomes the action of the auxiliary reaction spring (1031) to trigger the auxiliary micro switch (1041) to switch the output state; When the switch is closed, the slider shaft (18) moves away from the auxiliary top plate (16-3), so that the auxiliary reaction spring (1031) pushes the auxiliary slider (1051) to drive the auxiliary top plate (16-3) to rotate, and when the auxiliary slider (1051) leaves the auxiliary micro switch (1041), the micro switch (104) is triggered to switch the output state.

18. The molded case circuit breaker according to claim 17, characterized in that: An auxiliary pressing plate (16-4) is provided on the side of the auxiliary top plate (16-3) close to the slider shaft (18), and the auxiliary pressing plate (16-4) is used to contact the slider shaft (18) so that the slider shaft (18) pushes the auxiliary pressing plate (16-4) to drive the auxiliary top plate (16-3) to rotate.

19. The molded case circuit breaker according to claim 18, characterized in that: The auxiliary pressing plate (16-4) is provided with an auxiliary positioning groove (16-2), and the auxiliary positioning groove (16-2) is used for upper limit positioning with the slider shaft (18).

20. The molded case circuit breaker according to claim 18, characterized in that: An auxiliary reinforcing plate (16-5) is provided on the side of the auxiliary top plate (16-3) close to the slider shaft (18), and the auxiliary reinforcing plate (16-5) is used to contact and cooperate with the slider shaft (18). The auxiliary reinforcing plate (16-5), the auxiliary pressure plate (16-4) and the auxiliary top plate (16-3) are arranged perpendicular to each other.

21. The molded case circuit breaker according to claim 18, characterized in that: The thickness of the auxiliary pressure plate (16-4) is smaller than the thickness of the auxiliary rotating part (16-1); the auxiliary pressure plate (16-4) is connected to one of the side edges of the auxiliary rotating part (16-1) in the thickness direction; an auxiliary avoidance groove (16-6) is formed between the other side edge of the auxiliary pressure plate (16-4) opposite in the thickness direction and the auxiliary pressure plate (16-4); the auxiliary avoidance groove (16-6) is used to avoid the second connecting rod (12) and the slider member (11) connected to the slider shaft (18).

22. The molded case circuit breaker according to claim 17, characterized in that: The auxiliary rotating part (16-1) is provided with an auxiliary insertion groove (16-7) for inserting the alarm top rod (15), and auxiliary through holes (16-8) for passing the fixed shaft (4S) are respectively provided on two side walls opposite to the auxiliary insertion groove (16-7); the transmission mechanism (103) also includes an alarm top rod (15), the alarm top rod (15) passes through the auxiliary insertion groove (16-7) and aligns the alarm second through hole (15-3) for connecting the fixed shaft (4S) with the auxiliary through holes (16-8) on the side walls on both sides, and the fixed shaft (4S) is used to pass through the two auxiliary through holes (16-8) and the alarm second through hole (15-3), so that the auxiliary top rod (16) and the alarm top rod (15) are respectively rotatably installed on the fixed shaft (4S).

23. The molded case circuit breaker according to claim 7, characterized in that: The operating mechanism (102) is provided with a fixed shaft (4S), and the top rod of the auxiliary transmission mechanism and the top rod of the alarm transmission mechanism are respectively rotatably mounted on the fixed shaft (4S).

24. The molded case circuit breaker according to claim 3, characterized in that: The connecting rod mechanism is provided with a lower connecting rod (13) rotatably connected to the second connecting rod (12). When the second connecting rod (12) rotates, the lower connecting rod (13) is driven to rotate, so that the lower connecting rod (13) drives the rotating shaft system (101) to connect and disconnect the main circuit.

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