Cascade structure of circuit breaker monomers, circuit breaker monomers, and circuit breaker

Abstract

The present invention discloses a cascade structure of circuit breaker cells, circuit breaker cells and circuit breakers. The cascade structure of the circuit breaker cells includes a cascade assembly, which includes a fixed part installed inside the shell of the circuit breaker cell; a first spring piece and a second spring piece, both arranged on a side surface of the fixed part; a moving part installed inside the shell and arranged on one side of the first spring piece and abutting against the second spring piece; a transmission assembly, which is transmission-connected to the moving part and communicated with the outside of the shell. When the transmission assembly is acted on, the transmission assembly can drive the moving part to move relative to the fixed part, so that the moving part can switch between two states of extending out of the shell and retracting into the shell. When the moving part extends out of the shell, it can extend into the shell of another circuit breaker cell and abut against the first spring piece of the circuit breaker cell. The circuit breaker cell provided by the present invention includes the above-mentioned cascade structure. The circuit breaker provided by the present invention includes the above-mentioned circuit breaker cell.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a cascade structure of circuit breaker units, a circuit breaker unit and a circuit breaker. Background Art

[0002] Existing circuit breakers typically use pins to achieve cascade connections for power and communication between individual circuit breaker units. Once the individual units are cascaded, the circuit breaker becomes a single unit. If a circuit breaker unit fails and a component needs to be replaced or disassembled, all other components on the left and / or right side of the component must be removed to replace the component. This makes on-site replacement and disassembly of circuit breaker parts difficult and inefficient.

[0003] Therefore, a cascade structure of circuit breaker units is urgently needed to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a cascade structure of circuit breaker monomers, which simplifies the disassembly and installation process of parts in the circuit breaker and improves the installation and disassembly efficiency.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A cascade structure of circuit breaker units includes a cascade assembly, wherein the cascade assembly includes:

[0007] A fixing part, installed inside the housing of the circuit breaker unit;

[0008] The first elastic piece and the second elastic piece are both arranged on one side surface of the fixing member;

[0009] A moving member installed inside the housing and arranged on one side of the first elastic piece and abutting against the second elastic piece;

[0010] A transmission assembly is in transmission connection with the movable member and communicates with the outside of the housing. When the transmission assembly is operated, the transmission assembly can drive the movable member to move relative to the fixed member, so that the movable member can switch between two states of extending from the housing and retracting into the housing. When the movable member extends out of the housing, it can extend into the housing of another circuit breaker unit and abut against the first spring piece of the circuit breaker unit.

[0011] Optionally, it also includes a limiting groove, which is arranged on the inner side of the shell, and the fixing piece is clamped in the limiting groove and electrically connected to the circuit board of the circuit breaker unit. The first spring piece and the second spring piece each include a plurality of spring piece bodies, and the middle part of the spring piece body is bent to form a first bending part and a second bending part. The first end of the first bending part is connected to the fixing piece, and the second end is connected to the first end of the second bending part. There is a gap between the second end of the second bending part and the fixing piece.

[0012] Optionally, a transmission seat is further included, the transmission seat is installed on the moving part, and the transmission assembly is in contact transmission connection with the transmission seat.

[0013] Optionally, the transmission assembly includes a rotating member and a first push rod, the rotating member is mounted on the housing and can be rotated relative to the housing, the first push rod is mounted on the rotating member and can abut against the transmission seat, when the rotating member rotates, the first push rod can push the transmission seat to move in a straight line.

[0014] Optionally, it also includes an opening on the shell, the rotating member is arranged in the opening, one of a limiting groove and a limiting step is provided on the inner wall of the opening, the rotating member is provided with the other of the limiting groove and the limiting step, and the limiting step extends into the limiting groove and can rotate relative to the limiting groove.

[0015] Optionally, a guide groove is provided on the transmission seat, and the first push rod extends into the guide groove.

[0016] Optionally, a limiting groove is further included, wherein the limiting groove is arranged in the shell, the transmission seat is arranged in the limiting groove, and the limiting groove can limit the first push rod in the guide groove.

[0017] Optionally, one of a limiting block and a limiting slot hole is further provided in the limiting slot, and the other of the limiting block and the limiting slot hole is provided on the transmission seat, and the limiting block can extend into the limiting slot hole to prevent the moving part from slipping out of the shell.

[0018] Optionally, an opening is further included, wherein the opening is provided on the shell, and the moving member can extend out of and retract into the shell through the opening.

[0019] Another aspect of the present invention provides a circuit breaker unit including the above-mentioned cascade structure.

[0020] Optionally, it also includes a first current transformer, a second current transformer and a third current transformer. The first current transformer, the second current transformer and the third current transformer are all communicatively connected to the circuit board of the circuit breaker unit. The first current transformer is used to measure the current, the second current transformer is used for leakage detection, and the third current transformer is used for leakage protection.

[0021] Another aspect of the present invention provides a circuit breaker, comprising the above-mentioned circuit breaker unit.

[0022] Optionally, the circuit breaker units include a plurality of units, and the plurality of circuit breaker units are detachably connected via the cascade structure.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The cascade structure of circuit breaker cells provided by the present invention includes a cascade assembly, which includes a fixed member, a first spring clip, a second spring clip, a movable member, and a transmission assembly. The fixed member is mounted inside the housing of the circuit breaker cell. The first spring clip and the second spring clip are both arranged on a side surface of the fixed member. The movable member is mounted inside the housing and arranged on one side of the first spring clip and abuts against the second spring clip. The transmission assembly is in transmission connection with the movable member and communicates with the outside of the housing. When the transmission assembly is actuated, the transmission assembly can drive the movable member to move relative to the fixed member so that the movable member can switch between two states of extending out of the housing and retracting into the housing. When the movable member extends out of the housing, it can extend into the housing of another circuit breaker cell and abut against the first spring clip of the circuit breaker cell, thereby realizing a cascade between two or more circuit breaker cells. When one or more circuit breaker cells in a circuit breaker need to be replaced, only the movable member of the circuit breaker cell is required to selectively remove and replace one or more circuit breaker cells of the circuit breaker. Or when a faulty part inside a circuit breaker cell needs to be replaced, one or more circuit breaker cells can be removed first, then disassembled, and the corresponding faulty part can be removed. Compared to the prior art, which requires only removing all parts on both sides of the entire circuit breaker cell to remove the circuit breaker cell to replace the circuit breaker cell or its parts, this solution is simpler to operate and greatly improves the efficiency of circuit breaker installation and assembly and disassembly. On the other hand, the cascading between circuit breaker cells in the prior art is achieved through pins, which are small and prone to deformation. In addition, the pins are placed separately from other parts of the circuit breaker before being installed in the circuit breaker, making them prone to loss, which in turn affects the cascading between circuit breaker cells. The cascading structure used in this embodiment is installed in the housing, effectively solving the problem of pins being easily lost in the prior art. In addition, the movable and fixed parts are larger than the pins, which can effectively prevent the deformation of the cascade structure. On the other hand, In the prior art, pins are used to achieve cascading between circuit breaker cells. The pins are exposed outside the housing, resulting in safety hazards and affecting the aesthetics of the product. In the cascade structure of this embodiment, only a portion of the transmission assembly can communicate with the outside of the housing, reducing the volume of the cascade structure exposed outside the housing, thereby improving the safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 1 is a schematic diagram of the three-dimensional structure of a circuit breaker unit provided by a specific embodiment of the present invention (the moving part extends out of the housing);

[0026] Figure 2 yes Figure 1 Exploded view of

[0027] Figure 31 is a schematic diagram of the three-dimensional structure of a circuit breaker unit provided by a specific embodiment of the present invention (the moving part is retracted into the housing);

[0028] Figure 4 yes Figure 3 Exploded view of

[0029] Figure 5 It is a schematic diagram of the assembly between the cascade structure, limiting grooves, openings and a portion of the housing of a circuit breaker unit provided by a specific embodiment of the present invention;

[0030] Figure 6 1 is a schematic diagram of a three-dimensional structure of a cascade structure of circuit breaker units provided in a specific embodiment of the present invention;

[0031] Figure 7 It is a left side view of the cascade structure of the circuit breaker monomers provided by a specific embodiment of the present invention;

[0032] Figure 8 This is a partial structural diagram of a partial housing of a circuit breaker unit provided by a specific embodiment of the present invention;

[0033] Figure 9 1 is a schematic diagram of the three-dimensional structure of a circuit breaker provided in a specific embodiment of the present invention (assembled from two circuit breaker monomers);

[0034] Figure 10 yes Figure 9 Exploded view of

[0035] Figure 11 This is a schematic diagram of the cascade assembly of two circuit breaker units, a power module, and a gateway module provided by a specific embodiment of the present invention;

[0036] Figure 12 1 is a schematic diagram of the three-dimensional structure of a circuit breaker unit provided in a specific embodiment of the present invention (after removing part of the housing);

[0037] Figure 13 1 is a schematic diagram of the three-dimensional structure of a circuit breaker unit provided by a specific embodiment of the present invention (after removing the circuit board and part of the housing);

[0038] Figure 14 It is an assembly diagram of the gear assembly and the fourth reduction gear of the circuit breaker unit provided by a specific embodiment of the present invention;

[0039] Figure 15 1 is a schematic diagram of the three-dimensional structure of a circuit breaker unit provided by a specific embodiment of the present invention from another angle (after removing the circuit board and part of the housing).

[0040] In the picture:

[0041] 1. Housing; 11. Opening; 12. Limiting groove; 13. Opening; 14. Limiting block;

[0042] 2. Cascade assembly; 21. Fixing member; 210. Right end portion; 211. First spring piece; 212. Second spring piece; 213. Spring piece body; 2131. First bending portion; 2132. Second bending portion; 22. Moving member; 23. Transmission seat; 231. Guide groove; 232. Limiting slot; 24. Rotating member; 241. First rotating portion; 242. Second rotating portion; 25. First push rod;

[0043] 3. Gear assembly; 31. First reduction gear set; 311. First gear; 312. Second reduction gear; 32. Second gear set; 321. Third gear; 322. Fourth gear; 33. Third reduction gear set; 331. Fifth gear; 332. Sixth gear;

[0044] 4. Driving parts;

[0045] 51. First micro switch; 52. Second micro switch; 53. Third micro switch; 54. Fourth micro switch;

[0046] 6. Leakage release;

[0047] 7. Circuit board;

[0048] 8. Handle;

[0049] 9. Push the lever;

[0050] 10. Fourth reduction gear. DETAILED DESCRIPTION

[0051] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0052] Please refer to Figures 1-8 The present invention provides a cascade structure of a circuit breaker monomer, including a cascade assembly 2, the cascade assembly 2 including a fixed part 21, a first spring piece 211, a second spring piece 212, a movable part 22 and a transmission assembly. The fixed part 21 is installed inside the shell 1 of the circuit breaker monomer. The first spring piece 211 and the second spring piece 212 are both arranged on one side of the fixed part 21. The movable part 22 is installed inside the shell 1 and is arranged on one side of the first spring piece 211 and abuts against the second spring piece 212. The transmission assembly is connected to the movable part 22 in a transmission manner and is connected to the outside of the shell 1. When acting on the transmission assembly, the transmission assembly can drive the movable part 22 to move relative to the fixed part 21, so that the movable part 22 can switch between the two states of extending out of the shell 1 and retracting into the shell 1. Please refer to Figure 9 and Figure 10When the movable part 22 extends out of the housing 1, it can extend into the housing 1 of another circuit breaker unit and abut against the first spring piece 211 of the circuit breaker unit, thereby realizing the cascade between more than two circuit breaker units. When it is necessary to replace one or more circuit breaker units in the circuit breaker, only the movable part 22 of the circuit breaker unit is needed to selectively remove and replace one or more circuit breaker units of the circuit breaker. Or when it is necessary to replace the faulty parts inside the circuit breaker unit, the one or more circuit breaker units can be removed first, and then the one or more circuit breaker units can be disassembled, and then the corresponding faulty parts can be removed. Compared with the technical solution of the prior art that can only remove all parts on both sides of the entire circuit breaker unit to replace the circuit breaker unit or parts of the circuit breaker unit, the operation is simpler, which greatly improves the efficiency of circuit breaker installation and the efficiency of disassembly and assembly of circuit breaker units. On the other hand, the prior art uses pins to connect circuit breaker cells. These pins are small and prone to deformation. Furthermore, before being installed in the circuit breaker, the pins are placed separately from the other components of the circuit breaker, making them prone to loss, which in turn affects the connection between the circuit breaker cells. The cascade structure used in this embodiment is installed within the housing, effectively resolving the issue of pin loss in the prior art. Furthermore, the movable and fixed parts are larger than the pins, effectively preventing deformation of the cascade structure. On another note, the prior art uses pins to connect circuit breaker cells. These pins are exposed outside the housing, posing a safety hazard and affecting the product's aesthetics. In the cascade structure of this embodiment, only a portion of the transmission assembly is connected to the exterior of the housing, reducing the volume of the cascade structure exposed to the exterior, thereby improving the safety of the circuit breaker.

[0053] Optionally, it also includes a limiting groove, which is arranged on the inner side of the shell 1, and the fixing part 21 is clamped in the limiting groove and electrically connected to the circuit board 7 of the circuit breaker unit. The first spring piece 211 and the second spring piece 212 both include multiple spring piece bodies 213, and the middle part of the spring piece body 213 is bent to form a first bending portion 2131 and a second bending portion 2132. The first end of the first bending portion 2131 is connected to the fixing part 21, and the second end is connected to the first end of the second bending portion 2132. There is a gap between the second end of the second bending portion 2132 and the fixing part 21, so that the movable part 22 can press the spring piece body 213 down when moving to abut against the spring piece body 213.

[0054] Specifically, the right end portion 210 of the fixing member 21 is clamped in the limiting groove.

[0055] Optionally, a transmission seat 23 is further included, which is mounted on the moving member 22, and the transmission assembly is in contact transmission connection with the transmission seat 23. By acting on the transmission assembly, the transmission assembly acts on the transmission seat 23, and the transmission seat 23 drives the moving member 22 to move relative to the fixed member 21, thereby achieving a contact transmission connection between the transmission assembly and the moving member 22.

[0056] Optionally, the transmission assembly includes a rotating member 24 and a first push rod 25. The rotating member 24 is mounted on the housing 1 and is rotatable relative to the housing 1. The first push rod 25 is mounted on the rotating member 24 and is capable of abutting against the transmission seat 23. When the rotating member 24 rotates, the first push rod 25 can push the transmission seat 23 to move linearly. Specifically, the first push rod 25 is mounted on a circumferential side of an end portion of the rotating member 24. When the rotating member 24 rotates, the first push rod 25 rotates about the center of the rotating member 24 and pushes the transmission seat 23 to move linearly.

[0057] Optionally, the housing 1 further includes an opening 11, with a rotating member 24 disposed within the opening 11. The inner wall of the opening 11 is provided with one of a limiting groove and a limiting step, and the rotating member 24 is provided with the other of the limiting groove and the limiting step. The limiting step extends into the limiting groove and is rotatable relative to the limiting groove. The provision of the limiting groove and the limiting step can confine the rotating member 24 to the housing 1, preventing the rotating member 24 from dislodging from the housing 1.

[0058] Specifically, in this embodiment, the limiting groove is provided on the rotating body 24 , and the limiting step is provided on the inner wall of the opening 11 .

[0059] Furthermore, in this embodiment, the rotating body 24 includes a first rotating portion 241 and a second rotating portion 242, with a limiting groove formed between the first rotating portion 241 and the second rotating portion 242. Furthermore, the second rotating portion 242 is disposed between the first rotating portion 241 and the first push rod 25, and a side of the first rotating portion 241 away from the second rotating portion 242 is in communication with the exterior of the housing 1, facilitating an operator to use a tool to act on the first rotating portion 241 to force the first rotating portion 241 to rotate relative to the housing 1.

[0060] Optionally, in this embodiment, a screwdriver slot is provided on one side of the first rotating portion 241 away from the second rotating portion 242 , so that an operator can use a screwdriver to engage with the screwdriver slot to twist the rotating body 24 so that the rotating body 24 rotates relative to the housing 1 .

[0061] Optionally, the side of the first rotating portion 241 away from the second rotating portion 242 is arranged lower than the outer side of the opening 11 to further reduce the possibility of contact between the operator and the first rotating portion 241, thereby further improving the safety of the circuit breaker.

[0062] Optionally, a guide groove 231 is provided on the transmission seat 23, and the first push rod 25 extends into the guide groove 231, so that when the rotating member 24 rotates relative to the shell 1, the first push rod 25 can push the groove wall of the limiting groove to run along a straight line, thereby pushing the transmission seat 23 to move along a straight line.

[0063] Optionally, a limiting groove 12 is further included. The limiting groove 12 is arranged in the housing 1 , and the transmission seat 23 is arranged in the limiting groove 12 . The limiting groove 12 can limit the first push rod 25 in the guide groove 231 .

[0064] Optionally, an indicator arrow is provided on a side of the first rotating portion 241 away from the second rotating portion 242 , for determining whether the moving member 22 is retracted into the housing 1 or extended out of the housing 1 .

[0065] Specifically, twist the rotating body 24 in the clockwise direction so that when the rotating body 24 rotates 180°, the first push rod 25 moves from the first end of the guide groove 231 to the second end of the guide groove 231, and at the same time makes the movable member 22 extend out of the shell 1, and continue to twist the rotating body 24 in the clockwise direction so that when the rotating body 24 rotates 5°, the first push rod 25 abuts against the first inner wall of the limiting groove 12. At this time, the first push rod 25 is confined between the guide groove 231 and the first inner wall of the limiting groove 12 (the indicator arrow points to the left). When the rotating body 24 is twisted counterclockwise so that the rotating body 24 rotates 180° counterclockwise, the first push rod 25 moves from the second end of the guide groove 231 to the first end of the guide groove 231, and the movable member 22 is retracted into the housing 1. The rotating body 24 is further twisted counterclockwise so that the rotating body 24 rotates 5°. The first push rod 25 abuts the second inner side wall of the limiting groove 12. At this time, the first push rod 25 is confined between the guide groove 231 and the second inner side wall of the limiting groove 12 (the indicator arrow points to the right). The first inner side wall of the limiting groove 12 is arranged opposite to the second inner side wall of the limiting groove 12.

[0066] Optionally, the transmission seat 23 is provided on the upper side of the moving member 22, and the first elastic piece 211 and the second elastic piece 212 are provided on the lower side of the moving member 22. The first push rod 25 and the first elastic piece 211 clamp the moving member 22, thereby achieving the fixed installation of the moving member 22 in the housing 1 under the action of no external force (except gravity).

[0067] Optionally, one of the limiting block 14 and the limiting slot hole 232 is also provided in the limiting slot 12, and the other of the limiting block 14 and the limiting slot hole 232 is provided on the transmission seat 23. The limiting block 14 can extend into the limiting slot hole 232 to prevent the moving part 22 from slipping out of the shell 1 (that is, to prevent the moving part 22 from completely sliding out of the shell 1).

[0068] Specifically, in this embodiment, a limiting block 14 is provided in the limiting slot 12 , and a limiting slot hole 232 is provided on the transmission seat 23 .

[0069] Please refer to Figure 9 and Figure 10 Optionally, the housing 1 further includes an opening 13, which is provided on the housing 1, and the movable member 22 can extend out of and retract into the housing 1 through the opening 13. Specifically, the first side surface and the second side surface of the housing 1 are both provided with openings 13, so that the movable member 22 of one circuit breaker unit can extend out of the opening 13 on the first side surface and extend into the other circuit breaker unit through the opening 13 on the second side surface.

[0070] It should be noted that Figure 9 and Figure 10 The connection diagram between two circuit breaker cells is only shown as an example. In other embodiments, the connection between three or more circuit breaker cells can also be achieved in the same manner.

[0071] Please refer to Figure 11 The circuit breaker in this embodiment further includes a power module 100 and a gateway module 200 , and both the power module 100 and the gateway module 200 are cascaded with the circuit breaker monomer through a cascade structure.

[0072] Another aspect of the present invention provides a circuit breaker unit including the above-mentioned cascade structure.

[0073] Please refer to Figure 12-14 Optionally, the device further includes a lever 9, a drive member 4, and a gear assembly 3. The lever 9 is rotationally connected to the housing 1 and is in transmission connection with the first contact of the circuit breaker. The drive member 4 is disposed within the housing 1. The gear assembly 3 is disposed within the housing 1 and in transmission connection with the drive member 4. The gear assembly 3 is in contact transmission connection with the lever 9. The drive member 4 is capable of driving the gear assembly 3 to rotate, thereby pushing the lever 9 to move the first contact and close or open the second contact of the circuit breaker.

[0074] Optionally, the gear assembly 3 includes a first reduction gear set 31, a second reduction gear set 312, and a third reduction gear set 33. The first reduction gear set 31 is meshed and connected to the driving member 4. The second reduction gear set 312 is meshed and connected to the first reduction gear set 31. The third reduction gear set 33 is meshed and connected to the second reduction gear set 312, so that the output speed of the third reduction gear set 33 meets a preset requirement.

[0075] Optionally, the driving member 4 is a worm motor.

[0076] Optionally, the first reduction gear set 31 includes a first gear 311 and a second gear, wherein the first gear 311 is meshed and connected to the worm of the worm motor. The second reduction gear set 312 includes a third gear 321 and a fourth gear 322, wherein the third gear 321 is meshed and connected to the second gear. The third reduction gear set 33 includes a fifth gear 331 and a sixth gear 332, wherein the fifth gear 331 is meshed and connected to the fourth gear 322.

[0077] Optionally, the gear assembly 3 further includes a second push rod, which is provided on the third reduction gear set 33 and can be in contact transmission connection with the shifting rod 9 .

[0078] Specifically, the second push rod is disposed on the sixth gear 332 .

[0079] Optionally, the system further includes a circuit board 7, a first microswitch 51, and a second microswitch 52. The first microswitch 51 and the second microswitch 52 are both arranged on one side of the third reduction gear set 33 and are in communication with the circuit board 7. The third reduction gear set 33 is provided with a first position detection unit. The first microswitch 51 and the second microswitch 52 detect the position of the first position detection unit in real time. The circuit board 7 controls the start and stop of the driving member 4 based on the position information of the first position detection unit. Specifically, when the first microswitch 51 detects the first position detection unit, it indicates that the second push rod is disengaged from the shift lever 9, and the sixth gear 332 rotates to the position, the first contact and the second contact are closed, and at this time the circuit board 7 instructs the driving member 4 to stop running. When the second microswitch 52 detects the first position detection unit, it indicates that the second push rod is in contact with the shift lever 9, and the second push rod pushes the shift lever 9 to rotate to the position, the first contact and the second contact are disconnected, and at this time the circuit board 7 instructs the driving member 4 to stop running.

[0080] Optionally, the device further includes a fourth reduction gear 10 and a handle 8, one end of the handle 8 extending outside the housing 1, and the other end connected to the fourth reduction gear 10. The fourth reduction gear 10 is meshed and connected to the third reduction gear set 33. An operator can manually push the handle 8 to rotate the fourth reduction gear 10, which in turn drives the third reduction gear set 33 to rotate, thereby causing the second push rod to drive the shift lever 9 to rotate, thereby controlling the closing or opening of the first contact and the second contact.

[0081] Optionally, the device further includes a circuit board 7, a third microswitch 53, and a fourth microswitch 54. The third microswitch 53 and the fourth microswitch 54 are both disposed on one side of the fourth reduction gear 10 and are in communication with the circuit board 7. The fourth reduction gear 10 is provided with a second position detection unit. The third microswitch 53 and the fourth microswitch 54 detect the position of the second position detection unit in real time. The circuit board 7 controls the start and stop of the driving member 4 based on the position of the second position detection unit. Specifically, when the third microswitch 53 detects the second position detection unit, it indicates that the second push rod is disengaged from the shift rod 9 and the sixth gear 332 is rotated into position. At this time, the third microswitch 53 sends a state information that the first contact and the second contact are closed to the circuit board 7; when the fourth microswitch 54 detects the second position detection unit, it indicates that the second push rod is in contact with the shift rod 9 and the second push rod pushes the shift rod 9 to rotate into position. At this time, the fourth microswitch 54 sends a state information that the first contact and the second contact are disconnected to the circuit board 7.

[0082] When the information obtained by the first microswitch 51 and the third microswitch 53 regarding the closing and opening of the first and second contacts is inconsistent, it indicates that one or both of the first and third microswitch 51 and 53 have failed. In this case, the circuit breaker unit issues an alarm to notify the operator to repair or replace the circuit breaker unit. When the information obtained by the second microswitch 52 and the fourth microswitch 54 regarding the closing and opening of the first and second contacts is inconsistent, it indicates that one or both of the second and fourth microswitch 52 and 54 have failed. In this case, the circuit breaker unit issues an alarm to notify the operator to repair or replace the circuit breaker unit.

[0083] Optionally, the system further includes a first current transformer, a second current transformer, and a third current transformer. The first current transformer, the second current transformer, and the third current transformer are all communicatively connected to the circuit board 7 of the circuit breaker unit. The first current transformer is used to measure current, the second current transformer is used to detect leakage, and the third current transformer is used for leakage protection. When a leakage occurs in the circuit breaker unit, the third current transformer performs leakage protection on the circuit breaker unit. If the first and second contacts of the circuit breaker unit are still not disconnected after the third current transformer performs leakage protection on the circuit breaker unit, the second current transformer issues a disconnection command through the main chip of the circuit board 7 to disconnect the first and second contacts of the circuit breaker unit, thereby realizing the dual leakage protection function of the circuit breaker unit.

[0084] Optionally, a leakage release 6 is also included. The leakage release 6 is connected to the circuit board 7 and installed at one end of the lever 9. When a leakage occurs in the circuit breaker, the circuit board 7 instructs the leakage release 6 to operate, and the leakage release 6 pushes the lever 9, causing the lever 9 to rotate until the first contact and the second contact of the circuit breaker unit are disconnected.

[0085] Another aspect of the present invention provides a circuit breaker, comprising the above-mentioned circuit breaker unit.

[0086] Optionally, the circuit breaker units include multiple units, and the multiple circuit breaker units are detachably connected via a cascade structure.

[0087] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A cascade structure of circuit breaker units, characterized in that: The invention comprises a cascade component (2), wherein the cascade component (2) comprises: A fixing member (21) is installed inside the housing (1) of the circuit breaker unit; A first elastic piece (211) and a second elastic piece (212) are both arranged on a side surface of the fixing member (21); A moving member (22) is installed inside the housing (1) and is disposed on one side of the first elastic piece (211) and is connected to the second elastic piece (212); A transmission assembly is connected to the movable member (22) and communicated with the outside of the housing (1). When the transmission assembly is used, the transmission assembly can drive the movable member (22) to move relative to the fixed member (21), so that the movable member (22) can switch between two states of extending from the housing (1) and retracting into the housing (1). When the movable member (22) extends out of the housing (1), it can extend into the housing (1) of another circuit breaker monomer and connect with the first elastic piece (211) of the circuit breaker monomer. The transmission assembly includes a rotating member (24) and a first push rod (25). The rotating member (24) includes a first rotating part (241) and a second rotating part (242). A limiting groove is formed between the first rotating part (241) and the second rotating part (242). The invention also includes an opening (11) provided on the shell (1), the rotating member (24) is arranged in the opening (11), one of a limiting groove and a limiting step (111) is provided on the inner wall of the opening (11), the other of the limiting groove and the limiting step (111) is provided on the rotating member (24), and the limiting step (111) extends into the limiting groove and can rotate relative to the limiting groove.

2. The cascade structure of circuit breaker units according to claim 1, characterized in that: The housing (1) further comprises a limiting groove, wherein the limiting groove is arranged on the inner side of the housing (1); the fixing member (21) is clamped in the limiting groove and electrically connected to the circuit board (7) of the circuit breaker unit; the first spring piece (211) and the second spring piece (212) each comprise a plurality of spring piece bodies (213); the middle portion of the spring piece body (213) is bent to form a first bending portion (2131) and a second bending portion (2132); the first end of the first bending portion (2131) is connected to the fixing member (21), and the second end is connected to the first end of the second bending portion (2132); and a gap is provided between the second end of the second bending portion (2132) and the fixing member (21).

3. The cascade structure of circuit breaker units according to claim 1, characterized in that: It also includes a transmission seat (23), which is installed on the moving member (22), and the transmission assembly is in contact transmission connection with the transmission seat (23).

4. The cascade structure of circuit breaker units according to claim 3, characterized in that: The rotating member (24) is mounted on the housing (1) and is rotatable relative to the housing (1). The first push rod (25) is mounted on the rotating member (24) and is in contact with the transmission seat (23). When the rotating member (24) rotates, the first push rod (25) can push the transmission seat (23) to move in a straight line.

5. The cascade structure of circuit breaker units according to claim 4, characterized in that: A guide groove (231) is provided on the transmission seat (23), and the first push rod (25) extends into the guide groove (231).

6. The cascade structure of circuit breaker units according to claim 5, characterized in that: It also includes a limiting groove (12), the limiting groove (12) is arranged in the housing (1), the transmission seat (23) is arranged in the limiting groove (12), and the limiting groove (12) can limit the first push rod (25) in the guide groove (231).

7. The cascade structure of circuit breaker units according to claim 6, characterized in that: One of the limiting block (14) and the limiting slot hole (232) is also provided in the limiting slot (12), and the other of the limiting block (14) and the limiting slot hole (232) is provided on the transmission seat (23), and the limiting block (14) can extend into the limiting slot hole (232) to prevent the moving part (22) from sliding out of the housing (1).

8. The cascade structure according to any one of claims 1 to 7, characterized in that: It also includes an opening (13), which is opened on the housing (1), and the moving member (22) can extend out of and retract into the housing (1) through the opening (13).

9. A circuit breaker unit, characterized in that: The invention comprises the cascade structure according to any one of claims 1 to 8.

10. The circuit breaker unit according to claim 9, characterized in that: The device further comprises a first current transformer, a second current transformer and a third current transformer, wherein the first current transformer, the second current transformer and the third current transformer are all connected to a circuit board (7) of the circuit breaker unit for communication, the first current transformer is used for measuring current, the second current transformer is used for leakage detection, and the third current transformer is used for leakage protection.

11. A circuit breaker, characterized in that: The circuit breaker unit comprises the circuit breaker unit according to claim 9 or 10.

12. The circuit breaker according to claim 11, wherein: The circuit breaker units include a plurality of units, and the plurality of circuit breaker units are detachably connected via the cascade structure.

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