Modularized molded case circuit breaker

Abstract

The utility model discloses a modularized molded case circuit breaker, which comprises a front module and a rear module, one end of the front module and one end of the rear module are respectively provided with a universal interface, and the front module and the rear module are connected through the universal interfaces. The utility model provides a modularized molded case circuit breaker structure form, the circuit breaker is divided into a plurality of standardized functional structures, and the plurality of functional structures are combined and installed by adopting a general interface form, so as to form a plurality of molded case circuit breakers with different functions, and the interaction among concentrated functional structures can be normally realized. By arranging the front module and the rear module, the front module can be set as a set of contact modules, and the rear module can be combined with the front module by randomly selecting a thermomagnetic module, an electronic module or an electric leakage module, so that various forms of an electronic molded case circuit breaker, a thermomagnetic molded case circuit breaker, an electric leakage molded case circuit breaker and the like can be formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a modular molded case circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can also close, carry, and interrupt the current under abnormal circuit conditions within a specified time. Among them, the molded case circuit breaker is one of the new circuit breakers comprehensively designed and developed by adopting advanced international technologies at present.

[0003] In the existing application scenarios of circuit breakers, molded case circuit breakers with different functional forms are adopted according to different requirements, including thermal-magnetic molded case circuit breakers, leakage molded case circuit breakers, electronic molded case circuit breakers, etc. Due to the variety of types, if production lines are separately set up for manufacturing various circuit breaker products classified by function, the manufacturer needs to set up multiple production lines, resulting in a waste of a large amount of idle resources and poor production rationality and flexibility. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a modular molded case circuit breaker.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A modular molded case circuit breaker includes a front module and a rear module. Universal interfaces are respectively arranged at one end of the front module and one end of the rear module, and the front module and the rear module are connected through the universal interfaces. A contact module is arranged in the front module. The contact module includes a contact switch, a traction rod, a transmission member, an armature arranged in the circuit breaker, a static contact, and a magnetic yoke. The traction rod abuts against the contact switch. The armature is connected to the transmission member. The magnetic yoke is fixedly arranged on the static contact. When a large current passes through the static contact, the magnetic yoke generates a magnetic field for attracting the armature to move within a set range. The movement of the armature drives the transmission member to abut against the traction rod, and the traction rod moves within a set range under the abutment of the transmission member to disengage from the contact switch.

[0007] Further, the rear module is a thermal-magnetic module or an electronic module.

[0008] Further, a leakage module is also included, and the leakage module is connected to the thermal-magnetic module or the electronic module.

[0009] Further, the leakage current module includes a bracket and a first push rod, and the first push rod moves relative to the bracket from a set reset position to a tripping position; a rotary tripping lever, a pressing plate, and a locking member for performing a tripping action are provided in the thermal magnetic module. A barb and a pressing rod are respectively extended in the radial direction of the rotary tripping lever, and the barb and the pressing rod are respectively abutted against the locking member and the pressing plate. The pressing plate is hinged in the thermal magnetic module. When the first push rod moves to the tripping position, the front end of the first push rod abuts against the pressing plate, and the barb is disengaged from the locking member.

[0010] Further, the number of the contact modules in the front module is set to be multiple, and the transmission member is disposed between two adjacent contact modules and is respectively connected to the armatures in two adjacent contact modules.

[0011] Further, a first rotating shaft is provided on the contact module, the traction rod is sleeved on the first rotating shaft and can rotate within a set range with the first rotating shaft as the center, and a buckle portion for abutting against the contact switch is provided on the traction rod.

[0012] Further, a second rotating shaft is provided in the middle of the transmission member, and the second rotating shaft is connected to the contact module for the transmission member to rotate within a set range with the second rotating shaft as the center. An abutting portion for abutting against the traction rod is formed at the top end of the transmission member.

[0013] Further, a through hole is provided on the transmission member, and a ejector rod for passing through the through hole is provided on the armature.

[0014] Further, it further includes a locking member that can move relative to the bracket within a set range, and a moving iron core for driving the locking member to act. The locking member abuts against the first push rod at the reset position and disengages from the first push rod at the tripping position; a support rotating shaft is provided on the bracket, the locking member is sleeved on the support rotating shaft and rotates relative to the bracket with the support rotating shaft as the center, and a torsion spring is sleeved on the support rotating shaft, and both ends of the torsion spring are respectively connected to the locking member and the bracket.

[0015] Further, it further includes a reset button, the reset button is slidably connected to the bracket, a lever is hinged on the bracket, a clamping portion is provided on the first push rod, a second sliding groove for the clamping portion to pass through is formed on the bracket, and both ends of the lever are respectively connected to the reset button and the clamping portion.

[0016] In summary, the beneficial effects of the present utility model are as follows:

[0017] The present utility model provides a modular structure form of a molded case circuit breaker. By splitting the circuit breaker into several standardized functional structures and combining and installing several functional structures in the form of a universal interface, molded case circuit breakers with various different functions can be formed, and the interaction between the centralized functional structures can be normally achieved. Specifically, by setting a front module and a rear module, the front module can be set as a set of contact modules, and the rear module can arbitrarily select a thermal-magnetic module, an electronic module or a leakage module to be combined with the front module to form various forms such as an electronic molded case circuit breaker, a thermal-magnetic molded case circuit breaker, and a leakage molded case circuit breaker; in the modular differentiation method, only several functional structures need to be produced, and various circuit breakers can be formed through the form of assembly, which greatly improves the rationality and flexibility of the manufacturer's production configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the front module and the thermal-magnetic module of the present utility model.

[0019] Figure 2 It is a schematic structural diagram of the front module and the electronic module of the present utility model.

[0020] Figure 3 It is a schematic structural diagram of the contact module in the front module of the present utility model.

[0021] Figure 4 It is a schematic structural diagram of the front module, the rear module and the leakage module of the present utility model.

[0022] Figure 5 It is a schematic structural diagram of the inside of the leakage module of the present utility model.

[0023] Figure 6 It is a schematic structural diagram of the contact module in the locked state of the present utility model.

[0024] Figure 7 For Figure 6 It is a schematic structural diagram of the tripping structure in

[0025] Figure 8 For Figure 7 It is a schematic sectional structure diagram in

[0026] Figure 9 It is a schematic structural diagram of the contact module in the tripped state of the present utility model.

[0027] Figure 10 For Figure 9 It is a schematic structural diagram of the tripping structure in

[0028] Figure 11 For Figure 10 It is a schematic sectional structure diagram in

[0029] Figure 12It is a schematic cross-sectional structure diagram of the cavity and the armature part in the contact module.

[0030] Figure 13 It is a schematic structure diagram of the armature.

[0031] Figure 14 It is a schematic structure diagram of the reset position of the action execution mechanism of the present utility model.

[0032] Figure 15 It is Figure 14 a schematic structure diagram from another perspective in

[0033] Figure 16 It is Figure 14 a schematic structure diagram of the first push rod and the locking part in

[0034] Figure 17 It is a schematic structure diagram of the tripping position of the action execution mechanism of the present utility model.

[0035] Figure 18 It is Figure 17 a schematic structure diagram from another perspective in

[0036] Figure 19 It is Figure 17 a schematic structure diagram of the first push rod and the locking part in

[0037] Figure 20 It is a schematic structure diagram of the reset button and the lever part.

[0038] Figure 21 It is a schematic structure diagram of the connection of the first push rod and the support and the top spring part.

[0039] Figure 22 It is a schematic structure diagram of the locking part and the moving iron core part.

[0040] Figure 23Schematic diagram of the tripping connection structure between the first push rod and the thermal magnetic module in the leakage module. Identifications in the figure: 1. Front module; 111. Contact switch; 1111. Locking plate; 1112. Fixed contact; 1113. Yoke; 112. Housing; 113. Arc extinguishing chamber; 114. Air passage; 115. Support member; 12. Armature; 121. Protrusion; 122. Cavity; 123. Thumb latch; 13. Traction rod; 131. First rotating shaft; 132. Buckle portion; 14. Transmission member; 141. Contact portion; 142. Through hole; 143. Second rotating shaft; 144. Return spring; 2. Leakage module; 21. Bracket; 211. First sliding groove; 212. Second sliding groove; 22. First push rod; 221. Sliding portion; 222. Clamping portion; 223. Card slot; 224. Top spring; 225. Pushing end; 23. Locking member; 231. Stopper; 232. Tail rod; 233. Support rotating shaft; 234. Torsion spring; 24. Reset button; 241. Square groove; 25. Lever; 251. Rivet; 26. Second push rod; 261. Connecting shaft; 262. Trigger portion; 263. Contact rod; 27. Moving iron core; 3. Rear module; 31. Thermal magnetic module; 32. Electronic module; 311. Rotary tripping rod; 3111. Pressing rod; 3112. Barb; 312. Pressure plate; 313. Locking part. Detailed implementation mode

[0041] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0042] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0043] All directional indications (such as up, down, left, right, front, back, horizontal, vertical...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0044] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0045] The present utility model provides a modular molded case circuit breaker, which has a variety of different functional forms that can be changed according to actual needs, including but not limited to electronic molded case circuit breakers, thermal-magnetic molded case circuit breakers, leakage molded case circuit breakers, etc.

[0046] Specifically, referring to Figure 1 and Figure 2 , the modular molded case circuit breaker includes a front module 1 and a rear module 3. The rear module 3 includes different functional forms for different uses, including but not limited to a thermal-magnetic module 31, an electronic module 32, etc. One end of the front module 1 is provided with a universal interface, and one end of the rear module 3 is also provided with a universal interface. The front module 1 and the rear module 3 are connected through the universal interface, so that any rear module 3 can be selected according to actual needs to be installed with the standardized front module 1 to form various different forms such as an electronic molded case circuit breaker, a thermal-magnetic molded case circuit breaker, and a leakage molded case circuit breaker.

[0047] Referring to Figure 3 , a contact module and an operating mechanism for operating the contact module to close and open externally are provided in the front module 1. An installation groove for fixedly installing the contact module is provided inside the front module 1, and a through groove communicating with the inside is formed on the outer wall of the front module 1 for the operating mechanism to partially extend out of the front module 1 for user operation.

[0048] The contact module includes a housing 112, and components such as a static contact 1112, a magnetic yoke 1113, an armature 12, a magnetic flux intensifying sheet, an arc separating sheet, an arc separating member, and an arc extinguishing chamber 113 provided inside the housing 112. The operating mechanism is arranged above the contact module and includes components such as a contact switch 111, a traction rod 13, a locking catch plate 1111, and a reaction spring.

[0049] Among them, the static contact 1112 and the armature 12 are both arranged on the same side inside the contact module. The magnetic yoke 1113 is fixedly arranged on the static contact 1112, and the armature 12 is located below the static contact 1112. When there is a large current passing through or a short circuit occurs in the circuit inside the contact module, the large current passes through the static contact 1112 to make the magnetic yoke 1113 generate a magnetic field, causing the armature 12 to move upward.

[0050] The operating mechanism is provided with a traction rod 13 connected by a first rotating shaft 131, and the contact switch 111 is provided with a locking plate 1111 in linkage with the mechanical transmission. The locking plate 1111 is connected with a reaction spring in the operating mechanism so that the locking plate 1111 is in a tensioned state when the contact switch 111 is closed. The traction rod 13 can rotate within a certain angle range, and one end of the traction rod 13 is provided with a snap portion 132 for cooperating with the locking plate 1111. The action range of the traction rod 13 includes a locked state and a tripped state. In the locked state, refer to Figure 6 , Figure 7 and Figure 8 The locking plate 1111 is held in tension and cannot move by the contact of the locking portion 132, so as to keep the contact switch 111 closed; in the tripped state, refer to Figure 9 , Figure 10 and Figure 11 , the locking plate 1111 is separated from the locking portion 132, and then can rebound to drive the contact switch 111 to open.

[0051] Reference Figure 12 and Figure 13 A cavity 122 for accommodating the armature 12 is formed in the contact module, a protrusion 121 is provided at one end of the armature 12, and a slot 223 for the protrusion 121 to extend into is provided on the inner wall of the cavity 122. The protrusion 121 is arc-shaped, so that the armature 12 can flip within a certain vertical angle with the slot 223 as a fulcrum. In the initial state and normal working state of the contact module, the armature 12 falls on the bottom of the cavity 122. When a large current passes through the contact module, the magnetic field generated by the yoke 1113 attracts the armature 12, driving it to flip upward.

[0052] When the contact module is working normally, the traction rod 13 is in a locked state, limiting the movement of the contact switch 111 and keeping it in a closed state; when a large current flows through the contact module, the movement of the armature 12 causes the traction rod 13 to switch from a locked state to a tripped state, so that the contact switch 111 can move to an open state to cut off the current.

[0053] A transmission member 14 is provided on the contact module for transmitting the movement of the armature 12 to the movement of the traction rod 13. The middle part of the transmission member 14 is hinged to the housing 112 through a second rotating shaft 143, enabling the transmission member 14 to rotate within a certain angular range with the second rotating shaft 143 as the center. A push rod 123 is provided on the armature 12, and the push rod 123 extends towards the transmission member 14. A through hole 142 for passing through the push rod 123 is formed on the transmission member 14. Under the flipping action of the armature 12, the push rod 123 contacts the inner wall of the through hole 142 to drive the rotation of the transmission member 14.

[0054] A contact portion 141 for acting on the traction rod 13 is formed at the top of the transmission member 14. When the contact module is in the normal working state and the traction rod 13 is in the locked state, the contact portion 141 does not contact the traction rod 13. When a large current passes through the contact module, the armature 12 drives the transmission member 14 to rotate, causing the contact portion 141 to move towards and abut against the traction rod 13, thereby pushing the traction rod 13 to rotate and enabling the snap portion 132 to be disengaged from the contact switch 111, entering the tripped state.

[0055] Furthermore, a return spring 144 is also provided on the transmission member 14. Support members 115 are fixedly provided on both sides outside the housing 112. Both ends of the return spring 144 are respectively connected to the transmission member 14 and the support member 115, and the elastic direction of the return spring 144 is set in the same direction as the rotation direction of the transmission member 14. When the contact module is in the normal working state and the traction rod 13 is in the locked state, the return spring 144 maintains the transmission member 14 at a position where it does not contact the traction rod 13. When the armature 12 drives the transmission member 14 to move, the return spring 144 generates a certain force to counteract the rotation of the transmission member 14, and when the armature 12 resets, it synchronously drives the transmission member 14 to reset.

[0056] By setting the detachable connection method of the return spring 144 with the transmission member 14 and the support member 115, users can replace the elastic specification of the return spring 144 according to actual usage requirements, thereby realizing the function of adjusting the magnitude of the current required for the contact module to trigger the tripped state. The detachable methods include, but are not limited to, setting holes, columns, etc. on the transmission member 14 and the support member 115 for the return spring 144 to be embedded, or setting hook portions to catch the return spring 144, etc.

[0057] It should be added that an air passage 114 is further provided inside the housing 112. An arc extinguishing chamber 113 for arc extinguishing is provided in the contact module. The two ends of the air passage 114 are respectively communicated with the cavity 122 and the arc extinguishing chamber 113, and the opening of the air passage 114 at the cavity 122 is directly below the armature 12. When a large fault current passes or a short - circuit occurs, arc gas will also be generated in the contact module, especially in areas such as the arc extinguishing chamber 113. The setting of the air passage 114 can introduce the arc gas into the cavity 122 to generate an upward impact on the armature 12, also driving the upward flipping action of the armature 12, and finally prompting the contact switch 111 to disengage, which can be used as a double - short - circuit - protection contact module to trip and open the switch in time.

[0058] In the front module 1, the contact module can be set to one or more. Preferably, in one embodiment, the number of contact modules is set to three, and the three contact modules are arranged side by side. The number of operating mechanisms is one, and it is arranged on the middle contact module.

[0059] Two adjacent contact modules are connected and fixed by the support member 115, and a transmission member 14 is arranged between two adjacent contact modules. The through - hole 142 on the transmission member 14 is bidirectional, respectively facing the contact modules on both sides. The ejector rods 123 on the armatures 12 in two adjacent contact modules respectively penetrate through the through - hole 142 from both sides. Furthermore, when the three contact modules are arranged side by side, by arranging two transmission members 14 between the three contact modules, the connection of the three armatures 12 to the transmission member 14 can be realized, so that when a large - current short - circuit occurs in any one of the contact modules, the contact switch 111 can be triggered to trip and open the switch.

[0060] The rear module 3 is a thermal - magnetic module 31 or an electronic module 32. The thermal - magnetic module 31 can realize short - circuit protection functions such as magnetic tripping and thermal tripping during the operation of the circuit breaker through a mechanical structure after it is installed with the front module 1. The electronic module 32 can realize magnetic protection, thermal protection, electric shock protection, etc. during the operation of the circuit breaker by detecting current through electronic components after it is installed with the front module 1.

[0061] In this embodiment, the structures and methods for realizing functions such as overload protection and electric shock protection in the thermal - magnetic module 31 and the electronic module 32 both adopt the schemes widely disclosed in the prior art, so no more details will be given here.

[0062] Further, when the front module 1 is installed with the thermal-magnetic module 31 or the electronic module 32, a leakage module 2 can also be installed at the other end of the thermal-magnetic module 31 or the electronic module 32 to provide leakage protection for the circuit breaker composed of the front module 1 and the thermal-magnetic module 31 or the electronic module 32; refer to Figure 4 and Figure 5 , the leakage module 2 and the thermal-magnetic module 31 or the electronic module 32 are installed through a universal interface.

[0063] Specifically, the leakage module 2 includes an action execution mechanism, and the action execution mechanism is used to execute the tripping action when a leakage occurs in the circuit breaker and the reset action after the circuit breaker trips.

[0064] Refer to Figure 14 and Figure 17 , the action execution mechanism includes: a bracket 21, a first push rod 22, a second push rod 26, a lever 25, a locking member 23, a moving iron core 27 and a reset button 24. The bracket 21 is fixedly arranged inside the leakage module 2, and the first push rod 22, the second push rod 26, the lever 25, the locking member 23, the moving iron core 27 and the reset button 24 are all correspondingly installed on the bracket 21.

[0065] Specifically, refer to Figure 21 , the first push rod 22 is slidably matched with the bracket 21 and can move relative to the bracket 21 in a straight line direction. A first chute 211 is opened on the bracket 21 in the straight line direction. A sliding portion 221 is arranged on the first push rod 22, and the sliding portion 221 passes through the first chute 211 and slides along the first chute 211.

[0066] A second chute 212 is also opened on the bracket 21 in the straight line direction. Correspondingly, a clamping portion 222 is arranged on the first push rod 22, and the clamping portion 222 passes through the second chute 212 and slides along the second chute 212. The first chute 211 and the second chute 212 jointly define the position between the first push rod 22 and the bracket 21 and define the movement track of the first push rod 22.

[0067] The reset button 24 is arranged on the bracket 21, and an elastic member is arranged inside the leakage module 2 and connected to the reset button 24, so that the reset button 24 has the function of being able to press and fluctuate. Furthermore, the reset button 24 can perform a lifting action relative to the bracket 21 in the vertical direction.

[0068] Refer to Figure 14 、 Figure 17 and Figure 20, the shift lever 25 is hinged to the bracket 21 by a rivet 251 and can rotate relative to the bracket 21 with the rivet 251 as the center. Two ends are formed on the shift lever 25, one end is connected to the reset button 24, and the other end is connected to the clamping portion 222. Specifically, a square groove 241 is provided on the reset button 24 for one end to be inserted, and a notch is formed in the middle of the clamping portion 222 for the other end to be inserted. The two ends are in a movable state in the square groove 241 and the notch, and the outer periphery of the end will abut against the inner wall of the square groove 241 or the inner wall of the notch to generate a certain acting force during operation.

[0069] When the reset button 24 moves up and down, it will drive the shift lever 25 to rotate, and further drive the clamping portion 222 to move along the second chute 212 through the shift lever 25, so as to achieve the effect of driving the first push rod 22 to move.

[0070] Refer to Figure 15 and Figure 18 , the second push rod 26 is arranged on the lower side of the bracket 21. A connecting shaft 261 is fixedly installed on the bracket 21. The second push rod 26 is arranged on the connecting shaft 261 and can rotate relative to the axis of the connecting shaft 261. A resisting rod 263 is arranged on the second push rod 26. The resisting rod 263 abuts upward against the rear end of the first push rod 22. When the first push rod 22 moves, it drives the resisting rod 263 to drive the second push rod 26 to rotate.

[0071] Refer to Figure 16 and Figure 19 , a supporting rotating shaft 233 is fixedly arranged on the bracket 21. The locking member 23 is arranged on the supporting rotating shaft 233 and can rotate relative to the axis of the supporting rotating shaft 233. A torsion spring 234 is sleeved on the supporting rotating shaft 233. Two ends of the torsion spring 234 are respectively connected to the locking member 23 and the bracket 21 to generate a certain state maintaining acting force or reset acting force on the locking member 23.

[0072] The first push rod 22 is respectively in a tripping position and a reset position at two different positions within its movement range. Among them, a connecting member is fixedly arranged on the bracket 21, and a top spring 224 is arranged between the connecting member and the first push rod 22. Two ends of the top spring 224 are respectively connected to the connecting member and the first push rod 22. The top spring 224 provides an elastic force for the first push rod 22 to move towards the tripping position.

[0073] A stop block 231 is formed on the locking member 23. A clamping groove 223 is provided at the bottom of the first push rod 22. An opening that communicates is provided below the clamping groove 223 to allow the stop block 231 to enter the clamping groove 223 from bottom to top. The locking member 23 includes two positions within its rotation range. One position is set such that when the first push rod 22 is in the reset position, the stop block 231 is located inside the clamping groove 223, and the inner wall of the rear end of the clamping groove 223 abuts against the stop block 231, so that the first push rod 22 cannot move. The other position is set to the position after the locking member 23 rotates to make the stop block 231 move downward out of the clamping groove 223. At this time, the first push rod 22 is in a movable state.

[0074] The moving iron core 27 is arranged on the lower side of the bracket 21. A coil is arranged on the outer periphery of the moving iron core 27. When a leakage condition occurs in the leakage module 2, the leakage current causes the coil to generate a magnetic field, and the magnetic field drives the moving iron core 27 to act axially. Refer to Figure 22 , a tail rod 232 extends downward from the locking member 23. The tail rod 232 is located on the axial direction of the moving iron core 27. When the moving iron core 27 is driven to move axially, it will abut against the tail rod 232 and then drive the locking member 23 to rotate, so that the stop block 231 moves downward out of the clamping groove 223.

[0075] In the leakage module 2 of this embodiment, when it is in the normal working state, reset to the initial state or working state, the first push rod 22 is in the reset position, and the stop block 231 is located in the clamping groove 223 to abut against the first push rod 22. At this time, if a leakage current occurs, the moving iron core 27 drives the locking member 23 to rotate to make the stop block 231 disengage from the clamping groove 223. Further, the first push rod 22 moves to the tripping position under the push of the top spring 224.

[0076] When reset is required in the above tripping position, by pressing the reset button 24 downward, the lever 25 is driven to rotate to drive the first push rod 22 to move to the reset position. At this time, the locking member 23 is driven by the restoring force of the torsion spring 234, driving the stop block 231 to enter the clamping groove 223 upward, abutting against the first push rod 22, and maintaining it in the reset position.

[0077] The leakage module 2 in this embodiment is provided with a switch and a release connected to the switch. A reaction force spring 224 is provided on the release. The front end of the first push rod 22 is set as a propulsion end 225. When the first push rod 22 is in the reset position, the propulsion end 225 abuts against the release to make it tensioned under the action of the reaction force spring 224. When the first push rod 22 is triggered to the trip position, the propulsion end 225 is disengaged from the release, and the reaction force spring 224 acts on the release to drive the switch to trip quickly.

[0078] The front end of the second push rod 26 is set as a trigger part 262. The connecting shaft 261 is located at the rear end of the second push rod 26. The center of gravity of the second push rod 26 is close to the front end, so that the second push rod 26 can keep the abutting rod 263 in contact with the first push rod 22. Then, when the first push rod 22 moves from the trip position to the reset position, the first push rod 22 pushes the abutting rod 263 to drive the second push rod 26 to rotate and move, so that the trigger part 262 moves upward for a certain distance. By arranging a micro switch above the trigger part 262, the micro switch is electrically connected to a display device, such as a lamp bead, etc. When the trigger part 262 is lifted, it can trigger the micro switch, and then light up the lamp bead to display the current reset state of the leakage module 2.

[0079] Further, when the leakage module 2 is installed with the thermal magnetic module 31 or the electronic module 32, the propulsion end 225 in the leakage module 2 acts on the thermal magnetic module 31. Refer to Figure 23 , a rotating release lever 311, a locking part 313 and a pressing plate 312 are arranged in the thermal magnetic module 31 or the electronic module 32. The action range of the rotating release lever 311 is to rotate along its own axis. A barb 3112 for hook connection with the locking part 313 and a pressing rod 3111 for abutting against the pressing plate 312 are respectively arranged on the rotating release lever 311. The barb 3112 and the pressing rod 3111 both extend along the radial direction of the rotating release lever 311. The pressing plate 312 is hinged in the thermal magnetic module 31 so that it can rotate along the hinge. When the first push rod 22 moves to the trip position, the propulsion end 225 on the first push rod 22 will abut against the pressing plate 312 and push the pressing plate 312 to rotate. Then, the pressing plate 312 pushes the pressing rod 3111 to drive the rotation of the rotating release lever 311, so that the barb 3112 is disengaged from the locking part 313, and thus tripping is realized.

[0080] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. A modular molded case circuit breaker, characterized in that, It includes a front module (1) and a rear module (3). One end of the front module (1) and one end of the rear module (3) are respectively provided with a universal interface, and the front module (1) and the rear module (3) are connected through the universal interface. A contact module is arranged in the front module (1), and the contact module includes a contact switch (111), a traction rod (13), a transmission member (14), an armature (12) arranged in the circuit breaker, a static contact (1112), and a magnetic yoke (1113). The traction rod (13) abuts against the contact switch (111), the armature (12) is connected to the transmission member (14), the magnetic yoke (1113) is fixedly arranged on the static contact (1112), and when a large current passes through the static contact (1112), the magnetic yoke (1113) generates a magnetic field for attracting the armature (12) to move within a set range. The movement of the armature (12) drives the transmission member (14) to abut against the traction rod (13), and the traction rod (13) moves within a set range under the abutment of the transmission member (14) to be disengaged from the contact switch (111).

2. The modular molded case circuit breaker according to claim 1, wherein The rear module (3) is a thermal magnetic module (31) or an electronic module (32).

3. The modular molded case circuit breaker according to claim 2, characterized in that, It further includes a leakage module (2), and the leakage module (2) is connected to the thermal magnetic module (31) or the electronic module (32).

4. The modular molded case circuit breaker according to claim 3, characterized in that, The leakage module (2) includes a bracket (21) and a first push rod (22), and the first push rod (22) moves relative to the bracket (21) from a set reset position to a trip position. A rotary trip rod (311), a pressing plate (312), and a locking member (313) for performing a trip action are arranged in the thermal magnetic module (31). Hooks (3112) and a pressing rod (3111) are respectively extended in the radial direction of the rotary trip rod (311), and the hooks (3112) and the pressing rod (3111) respectively abut against the locking member (313) and the pressing plate (312). The pressing plate (312) is hinged in the thermal magnetic module (31). When the first push rod (22) moves to the trip position, the front end of the first push rod (22) abuts against the pressing plate (312), and the hooks (3112) are disengaged from the locking member (313).

5. A modular molded case circuit breaker according to claim 1, characterized in that, The number of the contact modules in the front module (1) is set to be multiple, the transmission member (14) is arranged between two adjacent contact modules, and is respectively connected to the armatures (12) in the two adjacent contact modules.

6. A modular molded case circuit breaker according to claim 1 or 5, characterized in that, A first rotating shaft (131) is arranged on the contact module, the traction rod (13) is sleeved on the first rotating shaft (131), and can rotate within a set range with the first rotating shaft (131) as the center. A buckle portion (132) for abutting against the contact switch (111) is arranged on the traction rod (13).

7. A modular molded case circuit breaker according to claim 6, characterized in that, A second rotating shaft (143) is provided in the middle of the transmission member (14). The second rotating shaft (143) is connected to the contact module and is used for the transmission member (14) to rotate within a set range with the second rotating shaft (143) as the center. An abutting portion (141) for abutting against the traction rod (13) is formed at the top end of the transmission member (14).

8. A modular molded case circuit breaker according to claim 7, characterized in that, A through hole (142) is provided on the transmission member (14), and a push rod (123) for passing through the through hole (142) is provided on the armature (12).

9. The modular molded case circuit breaker according to claim 4, wherein It further includes a locking member (23) that can move within a set range relative to the bracket (21), and a moving iron core (27) for driving the locking member (23) to act. The locking member (23) abuts against the first push rod (22) at the reset position and disengages from the first push rod (22) at the tripping position. A support rotating shaft (233) is provided on the bracket (21). The locking member (23) is sleeved on the support rotating shaft (233) and rotates relative to the bracket (21) with the support rotating shaft (233) as the center. A torsion spring (234) is sleeved on the support rotating shaft (233), and both ends of the torsion spring (234) are respectively connected to the locking member (23) and the bracket (21).

10. A modular molded case circuit breaker according to claim 9, characterized in that, It further includes a reset button (24). The reset button (24) is slidably connected to the bracket (21). A lever (25) is hinged on the bracket (21). A clamping portion (222) is provided on the first push rod (22). A second sliding groove (212) for the clamping portion (222) to pass through is formed on the bracket (21). Both ends of the lever (25) are respectively connected to the reset button (24) and the clamping portion (222).

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