CN221125848U - Circuit breaker - Google Patents

Abstract

The application discloses a circuit breaker, which relates to the technical field of low-voltage electric appliances, and comprises a shell assembly, a circuit board and an isolation protective cover, wherein the shell assembly comprises a cover body and a base, the cover body is arranged on the base, the cover body and the base are enclosed to form a containing cavity, and the circuit board and the isolation protective cover are both arranged in the containing cavity; the isolation protection cover and the inner wall of the cover body enclose an isolation cavity, and the circuit board is arranged in the isolation cavity; the isolation protection cover is fixedly connected to the cover body or the base, or the cover body and the base are jointly fixed to the isolation protection cover; the isolation protective cover is provided with at least one communication port, the communication port can be used for communicating the isolation cavity with the cavity to be communicated, and the connection position of the communication port is isolated and assembled. The application can better protect the circuit board and reduce the possibility of damaging the circuit board by conductive dust, metal particles, destructive air flow and the like.

Description

Circuit breaker

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a circuit breaker.

Background

In the related technical field, along with the wide application of advanced technology in power grid systems, the intellectualization of the piezoelectric device is promoted. Compared with the traditional intelligent breaker, the intelligent breaker adopts a large number of electronic devices.

However, the circuit breaker body is broken under the fault current of the circuit to generate conductive dust, metal particles, destructive air flow and other harmful factors, and the conductive dust, the metal particles, the destructive air flow and the like can damage the control unit to cause the functional failure of the product.

Disclosure of utility model

The application provides a circuit breaker which can better protect a circuit board and reduce or even avoid the possibility of damaging the circuit board by conductive dust, metal particles, destructive air flow and the like.

The application provides a circuit breaker, which comprises a shell assembly, a circuit board and an isolation protective cover, wherein the shell assembly comprises a cover body and a base, the cover body is arranged on the base, the cover body and the base are enclosed to form a containing cavity, and the circuit board and the isolation protective cover are both arranged in the containing cavity; the isolation protection cover and the inner wall of the cover body enclose an isolation cavity, and the circuit board is arranged in the isolation cavity; the isolation protection cover is fixedly connected to the cover body or the base, or the cover body and the base are jointly fixed to the isolation protection cover; the isolation protective cover is provided with at least one communication port, the communication port can be used for communicating the isolation cavity with the cavity to be communicated, and the connection position of the communication port is isolated and assembled.

Based on the above examples of the application, the housing assembly may carry a circuit board, an isolation boot, and other related modules. The circuit board may connect and control the circuit associated with the circuit breaker. The isolation protection cover can isolate and protect the circuit board, and product function failure caused by damage to the circuit board caused by conductive dust, metal particles, destructive air flow and the like is reduced or even avoided. The above-mentioned conductive dust, metal particles, destructive air flow, and other damaging factors are generated during the circuit breaker opening process under the line fault current. Through setting up the isolation protection casing, can effectively wall conductive dust, metal particle, destructive air current etc. enter into the isolation cavity that the circuit board was located. The arrangement of the communication port can ensure that the circuit board is protected and simultaneously electrically connect corresponding functional devices in the circuit breaker to the circuit board. After the communication port is isolated and assembled, the isolation cavity where the circuit board is located can be reduced or even avoided from being reached from the position of the communication port by conductive dust, metal particles, destructive air flow and the like, the possibility of damage to the circuit board is further reduced, and the service life of the circuit board is prolonged. The embodiment of the application can better protect the circuit board and reduce or even avoid the possibility of damaging the circuit board by conductive dust, metal particles, destructive air flow and the like.

In some examples, a protective rib is arranged at the edge position of the communication port, an assembly port matched with the communication port is arranged on the cavity to be communicated, and an assembly rib is arranged at the edge position of the assembly port; the protection ribs are arranged in a staggered mode with the assembly ribs, or the protection ribs are abutted with the assembly ribs, or the protection ribs are connected with the assembly ribs through isolation washers.

Based on the above examples of the application, the protection rib can improve the strength of the communication port and the connection stability of the position of the communication port. The assembly port can be matched with the communication port to realize the communication between the isolation cavity and the cavity to be communicated. The assembly can only improve the strength of the assembly port and the connection stability of the position of the assembly port.

In some examples, the circumference side of the protection rib is provided with a first extension surface, the circumference side of the assembly rib is provided with a second extension surface, the protection rib and the assembly rib are arranged in a staggered manner, the end surface of the protection rib is abutted to the second extension surface, and the end surface of the assembly rib is abutted to the first extension surface.

Based on the above example of the present application, the first extension surface may be abutted with the assembly rib, so as to further improve the connection stability and isolation effect of the protection rib, and the second extension surface may be abutted with the protection rib, so as to further improve the connection stability and isolation effect of the protection rib, and through the cooperation of the first extension surface and the second extension surface, the protection rib and the assembly rib may have better protection and isolation effect when being staggered.

In some examples, the to-be-communicated chamber comprises a communication cavity arranged on the base, one end of the communication cavity is communicated with the isolation cavity through the communication port, and the other end of the communication cavity penetrates through the bottom wall of the base and is communicated to the outer side of the accommodating cavity; and/or the cavity to be communicated comprises a transformer installation cavity arranged on the base, the transformer installation cavity is formed by an assembly groove formed in the base and a transformer bracket arranged in the assembly groove, at least one transformer main body is arranged on the transformer bracket, and a connecting wire on the transformer main body is electrically connected to the circuit board through the communication port; and/or the cavity to be communicated comprises a top cavity arranged on the cover body, and the top cavity is positioned on the upper side of the isolation cavity.

Based on the above example of the present application, the above structure introduces three arrangement modes of the chambers to be communicated, and at least one of the three chambers to be communicated can appear, that is, only one of the communicating chamber, the transformer mounting chamber and the top chamber is communicated with the isolating chamber of the present application, so that the isolating effect of the present application can be realized. The communication cavity, the transformer installation cavity and the top cavity are all communicated with the isolation cavity, so that the electric connection among all parts of the circuit breaker can be ensured to a greater extent, and a better isolation effect can be achieved.

In some examples, an isolation fence matched with the isolation protection cover is arranged on the inner wall of the cover body, and the isolation fence and the side wall of the isolation protection cover are arranged in a staggered manner.

Based on the above example of the application, after the side walls of the isolation fence and the isolation protective cover are arranged in a staggered way, the connection stability of the isolation protective cover and the cover body can be improved, the isolation effect of the isolation protective cover can be further improved, and the gap between the isolation protective cover and the cover body is isolated to a greater extent.

In some examples, the communication port communicating with the top chamber is offset extended toward the outer peripheral side of the isolation chamber and forms a connection chamber on which an extension fence integrally provided with the side wall of the isolation boot 300 is provided.

Based on the above example of the application, the arrangement of the connecting cavity can lead the isolation protection cover to be communicated into the top cavity of the pair under the condition of smaller occupied space. The occupied volume of the isolation protective cover can be reduced to a certain extent, the consumable is reduced, and the whole production cost is reduced.

In some examples, a plurality of support structures are disposed within the isolation cavity, each support structure having a support surface disposed thereon, the support surface capable of supporting the circuit board.

Based on the above examples of the application, the plurality of support structures can better support the circuit board, and the mounting stability of the circuit board is improved. The circuit board can be supported at the corresponding position better by the plurality of supporting surfaces.

In some examples, a plurality of positioning tables are arranged on the periphery of the isolation protective cover, a positioning cavity matched with the positioning tables is formed in the base, a first positioning surface is arranged on one side, away from the cover body, of the positioning tables, and a limiting convex edge is arranged on the first positioning surface; the locating table is close to one side of the cover body and is provided with a second locating surface, the second locating surface abuts against the end face of the cover body, which faces towards the base, and the cover body is pressed on the second locating surface and limits the limiting protruding edges in the locating cavity.

Based on the above examples of the present application, the positioning stage can provide positioning accuracy that isolates the accuracy of the shield from the housing assembly. The first locating surface on the locating table can locate the relative position between the base and the isolation protective cover, and the locating effect can be higher through the locating cavity on the spacing bead adaptation base on the first locating surface. The second locating surface can be matched with the cover body, and the locating effect is guaranteed by pressing the cover body on the second locating surface and then stably installing the limiting convex edges in the locating cavity.

In some examples, the spacing ribs are "T" -shaped ribs or "L" -shaped ribs, the positioning cavity is adapted to the shape of the spacing ribs, each spacing rib defining at least two degrees of freedom of the isolation shield relative to the base; four positioning tables are arranged on the periphery side of the bottom wall of the isolation protective cover.

Based on the above example of the application, the above structure can reduce more freedom degrees of the isolation protective cover relative to the shell assembly, and ensure the installation stability of the isolation protective cover. The isolation protection cover can be better installed and positioned through the matching arrangement of the four positioning tables. The setting directions of the four positioning tables can be at least partially different so as to have better positioning effect.

In some examples, a fixing seat is arranged on the inner side of the isolation protective cover, a fixing hole is formed in the fixing seat, a positioning hole is formed in the circuit board, the circuit board is connected with the fixing seat through a fixing piece, and the fixing piece penetrates through the fixing hole and the positioning hole.

Based on the above example of the application, the fixing seat can fixedly connect the circuit board on the isolation protective cover, and the connection of the circuit board in the isolation cavity can be more stable and reliable by combining the supporting structure. The fixing holes and the positioning holes are matched, and the fixing piece can be used for fixing the circuit board. The fixing piece can be in a structure of a screw, a bolt, a screw rod, a rivet and the like.

Drawings

In order to more clearly illustrate the application or the technical solutions of the prior art, the drawings which are used in the examples or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some examples of the application and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is a schematic cross-sectional structural view of a circuit breaker in an example of the application;

fig. 2 is a schematic view showing the structure of a isolation shield in the circuit breaker according to an example of the present application;

Fig. 3 is a schematic top view of a isolation shield in a circuit breaker according to an example of the application;

FIG. 4 is a schematic view of another view of a shield in an exemplary circuit breaker of the present application;

FIG. 5 is a schematic bottom view of a isolation shield in an example circuit breaker of the present application;

fig. 6 is a schematic structural view of a cover in a circuit breaker according to an example of the present application;

Fig. 7 is a schematic structural view of a base in a circuit breaker according to an example of the present application;

fig. 8 is a schematic structural view of a circuit board in a circuit breaker according to an example of the present application.

Reference numerals:

100. a housing assembly; 110. a cover body; 111. a barrier; 120. a base; 121. a positioning cavity;

200. a circuit board; 210. positioning holes;

300. An isolation shield; 310. a communication port; 311. protective ribs; 312. a first extension surface; 320. a connecting cavity; 321. an extension bar; 330. a positioning table; 331. a first positioning surface; 332. a second positioning surface; 333. a limit rib; 340. a support structure; 341. a support surface; 350. a fixing seat;

400. a chamber to be communicated; 410. an assembly port; 411. assembling ribs; 412. a second extension surface; 420. a communication chamber; 430. a transformer mounting cavity; 440. a top chamber.

Detailed Description

The application will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the application more apparent. It should be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In order to solve the above-mentioned problems, referring to fig. 1-8, a first aspect of the present application provides a circuit breaker that can better protect a circuit board 200 and reduce or even avoid the possibility of damaging the circuit board 200 by conductive dust, metal particles, destructive air flow, etc.

Referring to fig. 1 to 8, in some examples of the present application, a circuit breaker includes a case assembly 100, a circuit board 200, and an isolation cover 300, the case assembly 100 including a cover 110 and a base 120, the cover 110 being mounted on the base 120, the cover 110 and the base 120 enclosing a receiving chamber, the circuit board 200 and the isolation cover 300 being disposed in the receiving chamber; the isolation protection cover 300 and the inner wall of the cover body 110 enclose an isolation cavity, and the circuit board 200 is installed in the isolation cavity; the isolation protection cover 300 is fixedly connected to the cover 110 or the base 120, or the cover 110 and the base 120 together fix the isolation protection cover 300; the isolation protection cover 300 is provided with at least one communication port 310, and the communication port 310 can communicate the isolation cavity to the cavity 400 to be communicated, and the connection position of the communication port 310 is assembled in an isolated manner.

Based on the above examples of the application, the housing assembly 100 may carry the circuit board 200, the isolation boot 300, and other related modules. The circuit board 200 may connect and control the circuit associated with the circuit breaker. The isolation protection cover 300 can isolate and protect the circuit board 200, and reduce or even avoid product functional failure caused by damage to the circuit board 200 caused by conductive dust, metal particles, destructive air flow and the like. The above-mentioned conductive dust, metal particles, destructive air flow, and other damaging factors are generated during the circuit breaker opening process under the line fault current. By arranging the isolation protection cover 300, conductive dust, metal particles, destructive air flow and the like on the wall surface can effectively enter the isolation cavity where the circuit board 200 is located, so that the hard isolation between the intelligent unit module (the module with the circuit board 200) and the inner cavity (the part containing cavity provided with the arc extinguishing chamber and the contact assembly) of the circuit breaker is realized. The communication port 310 is provided to electrically connect corresponding functional devices in the circuit breaker to the circuit board 200 while ensuring that the circuit board 200 is protected. After the communication port 310 is isolated and assembled, conductive dust, metal particles, destructive air flow and the like can be reduced or even avoided from reaching the isolation cavity where the circuit board 200 is located from the position of the communication port 310 or the gap of the connection position, so that the possibility of damage to the circuit board 200 is further reduced, and the service life of the circuit board 200 is prolonged. The embodiment of the application can better protect the circuit board 200 and reduce or even avoid the possibility of damaging the circuit board 200 by conductive dust, metal particles, destructive air flow and the like.

The isolation protection cover 300 can be independently fixed on the cover body 110 according to the requirement, the isolation protection cover 300 can be independently installed on the base 120 according to the requirement, or the isolation protection cover 300 can be fixed through the cooperation of the cover body 110 and the base 120. And particularly, a proper assembly mode is selected according to the needs. When the isolation protection cover 300 is separately installed, the isolation protection cover 300 may be fixed by means of screws, bolts, rivets, welding, fusing, or the like. When the isolation protection cover 300 is fixedly installed through the matching of the cover body 110 and the base 120, the isolation protection cover 300 can be clamped to at least one of the cover body 110 and the base 120, and then the fixation is realized through the pressing of the cover body 110 and the base 120.

Referring to fig. 1 to 8, in some examples of the present application, a protective rib 311 is provided at an edge position of a communication port 310, an assembly port 410 adapted to the communication port 310 is provided on a chamber 400 to be communicated, and an assembly rib 411 is provided at an edge position of the assembly port 410; the protective ribs 311 are arranged in a staggered manner with the assembly ribs 411, or the protective ribs 311 are abutted with the assembly ribs 411, or the protective ribs 311 are connected with the assembly ribs 411 through isolating washers.

Based on the above example of the present application, the guard rib 311 can improve the strength of the communication port 310 and improve the connection stability of the position of the communication port 310. The fitting opening 410 may be engaged with the communication opening 310 to achieve communication between the isolation chamber and the chamber 400 to be communicated. The assembly rib 411 can improve the strength of the assembly port 410 and the connection stability of the assembly port 410. The cooperation mode of the protection rib 311 and the assembly part can be set according to the requirement, the protection rib 311 and the assembly rib 411 can be mutually nested, a differential structure is realized, and then the double-isolation effect is achieved, the double-isolation structure has better connection stability and isolation, and the possibility of damage to the circuit board 200 caused by conductive dust, metal particles, destructive air flow and the like is further reduced. The protective ribs 311 and the assembly ribs 411 can be abutted against each other, so that a heavy isolation effect is realized, and the possibility of damaging the circuit board 200 by conductive dust, metal particles, destructive air flow and the like is reduced. The possibility of damage to the circuit board 200 by conductive dust, metal particles, destructive air flow, etc. can also be reduced by assuming a spacer washer to improve the insulation between the protective rib 311 and the mounting rib 411.

In some examples of the present application, the first extension surface 312 is disposed on the peripheral side of the protective rib 311, the second extension surface 412 is disposed on the peripheral side of the mounting rib 411, the protective rib 311 and the mounting rib 411 are disposed alternately, the end surface of the protective rib 311 abuts against the second extension surface 412, and the end surface of the mounting rib 411 abuts against the first extension surface 312.

Based on the above example of the present application, the first extension surface 312 may abut against the assembly rib 411, so as to further improve the connection stability and isolation effect of the protection rib 311, the second extension surface 412 may abut against the protection rib 311, so as to further improve the connection stability and isolation effect of the assembly rib 411, and the cooperation between the first extension surface 312 and the second extension surface 412 may enable the protection rib 311 and the assembly rib 411 to have better protection and isolation effect during interlacing.

The corresponding extension surfaces are not required to be arranged on the peripheral sides of all the communication ports 310, and the extension surfaces are particularly arranged according to the needs, so long as the better isolation effect can be achieved. The extension surface of the present application may be a surface extending toward the outer peripheral side or a surface extending toward the inner peripheral side corresponding to the communication port.

Referring to fig. 1 to 8, in some examples of the present application, the chamber to be communicated 400 includes a communication chamber 420 provided on the base 120, one end of the communication chamber 420 communicates with the isolation chamber through the communication port 310, and the other end of the communication chamber 420 penetrates through the bottom wall of the base 120 and communicates to the outside of the accommodation chamber; and/or, the to-be-communicated chamber 400 includes a transformer installation cavity 430 provided at the base 120, the transformer installation cavity 430 is formed by an assembly groove provided at the base 120 and a transformer bracket provided in the assembly groove, at least one transformer main body is provided on the transformer bracket, and a connection wire on the transformer main body is electrically connected to the circuit board 200 through the communication port 310; and/or, the chamber to be communicated 400 includes a top chamber 440 provided on the cover 110, the top chamber 440 being located at an upper side of the isolation chamber.

Based on the above example of the present application, the above structure describes three arrangements of the chambers 400 to be connected, and at least one of the three chambers 400 to be connected may occur, that is, only one of the connecting chamber 420, the transformer mounting chamber 430 and the top chamber 440 is connected to the isolating chamber of the present application, so that the isolating effect of the present application can be achieved. The communication chamber 420, the transformer installation chamber 430 and the top chamber 440 are all communicated with the isolation chamber of the present application, so that electrical connection between components of the circuit breaker can be ensured to a greater extent, and a better isolation effect can be provided.

The top chamber 440 may be a chamber in which a part of the switch is disposed, or may be a chamber in which the display module is disposed. The top chamber 440, which is in communication with the isolation chamber, may not be in communication with the arc chute of the corresponding circuit breaker, thereby avoiding the possibility of conductive dust, metal particles, damaging gas flow, etc. flowing out of the arc chute and damaging the circuit board 200.

The communication ports 310 of the present application may be connected to a wire structure, one end of which is connected to the circuit board 200 and the other end of which is electrically connected to a corresponding functional device. The communication port 310 at the upper side of the isolation boot 300 may be referred to as a top port, the top port may be disposed on the corresponding connection cavity 320, the top port may be provided with two top ports, and the structures of the two top ports may be the same or different, and the two top ports are all communicated to the top chamber 440. The communication ports 310 at the lower side of the isolation boot 300 may be bottom ports, and three bottom ports may be provided, wherein two bottom ports are communicated with the corresponding communication cavity 420, and the other bottom port is communicated with the transformer installation cavity 430. The three bottom ports may be identical in structure or may be different.

Referring to fig. 1 to 8, in some examples of the present application, an isolation fence 111 adapted to the isolation shield 300 is provided on an inner wall of the cover 110, and the isolation fence 111 is staggered with a sidewall of the isolation shield 300.

Based on the above example of the present application, after the side walls of the isolation barrier 111 and the isolation protection cover 300 are staggered, a rib protection structure can be formed, so that the connection stability of the isolation protection cover 300 and the cover 110 can be improved, the isolation effect of the isolation protection cover 300 can be further improved, and the gap between the isolation protection cover 300 and the cover 110 can be isolated to a greater extent.

In some examples of the present application, the communication port 310 communicating with the top chamber 440 is offset extended toward the outer peripheral side of the isolation chamber and forms the connection chamber 320, and the connection chamber 320 is provided with an extension bar 321 integrally provided with the sidewall of the isolation boot 300.

Based on the above examples of the present application, the connection cavity 320 may enable the isolation protection cover 300 to be connected to the top chamber 440 of the pair with less space. The occupied volume of the isolation protection cover 300 can be reduced to a certain extent, the consumable is reduced, and the whole production cost is reduced.

The communication port 310 located at the top end surface of the isolation protection cover 300 may be a connection cavity 320 formed by extending the side wall of the isolation protection cover 300 and forming an extension bar 321, where the connection cavity 320 extends and is communicated into the top chamber 440.

In some examples of the application, a plurality of support structures 340 are disposed within the isolation chamber, each support structure 340 having a support surface 341 disposed thereon, the support surface 341 being capable of supporting the circuit board 200.

Based on the above examples of the present application, the plurality of support structures 340 may better support the circuit board 200, improving the mounting stability of the circuit board 200. The circuit board 200 can be better supported at the corresponding positions by the plurality of supporting surfaces 341.

Further, a supporting structure 340 may be disposed at each of the four corners of the isolation cavity, and a supporting structure 340 may be disposed at the middle of the isolation cavity, so that the supporting stability of the circuit board 200 is higher by the joint support of the five supporting structures 340. The support structure 340 in the middle may be a prismatic, cylindrical or truncated cone-shaped support column, the top end surface of the support column is the support surface 341, and a support area matched with the corresponding support surface 341 is reserved on the circuit board 200. The support area is an area where the flat cable and the electronic device are not provided.

In some examples of the present application, a plurality of positioning tables 330 are disposed on the peripheral side of the isolation protection cover 300, a positioning cavity 121 adapted to the positioning tables 330 is disposed on the base 120, a first positioning surface 331 is disposed on the side of the positioning tables 330 facing away from the cover 110, and a limit rib 333 is disposed on the first positioning surface 331; the positioning table 330 is provided with a second positioning surface 332 near one side of the cover 110, the second positioning surface 332 abuts against the end surface of the cover 110 facing the base 120, and the cover 110 is pressed on the second positioning surface 332 and limits the limiting protruding rib 333 in the positioning cavity 121.

Based on the above example of the present application, the positioning stage 330 may improve the positioning accuracy of the isolation cover 300 and the housing assembly 100. The first positioning surface 331 on the positioning table 330 can position the relative position between the base 120 and the isolation protection cover 300, and the positioning effect can be better by the spacing rib 333 arranged on the first positioning surface 331 to be matched with the positioning cavity 121 on the base 120. The second positioning surface 332 can be matched with the cover body 110, and the positioning effect is ensured by pressing the cover body 110 on the second positioning surface 332, so that the spacing rib 333 is stably installed in the positioning cavity 121. The positioning tables 330 may be disposed at different positions, so that more degrees of freedom of the isolation protection mask 300 with respect to the housing assembly 100 may be reduced, and installation stability of the isolation protection mask 300 is ensured.

The guiding inclined plane matched with the positioning cavity 121 can be arranged on the limiting convex rib 333 according to the requirement, or the guiding inclined plane matched with the limiting convex rib 333 can be arranged at the opening of the positioning cavity 121, so that the positioning assembly efficiency of the isolation protection cover 300 can be improved.

In some examples of the present application, the spacing ribs 333 are "T" -shaped ribs or "L" -shaped ribs, the positioning cavity 121 is adapted to the shape of the spacing ribs 333, and each spacing rib 333 at least defines two degrees of freedom of the barrier shield with respect to the base; four positioning tables 330 are provided on the peripheral side of the bottom wall of the isolation boot 300.

Based on the above example of the present application, the above structure can reduce more degrees of freedom of the isolation cover 300 with respect to the housing assembly 100, and ensure the installation stability of the isolation cover 300. The isolation protection cover 300 can be better installed and positioned through the matching arrangement of the four positioning tables 330. The setting directions of the four positioning tables 330 may be at least partially different to have a better positioning effect.

Each surface of the spacing rib 333 may be adapted to the inner wall of the positioning cavity 121, and the more the matched wall surfaces, the better the positioning effect.

In some examples of the present application, a fixing base 350 is disposed on the inner side of the isolation protection cover 300, a fixing hole is formed on the fixing base 350, a positioning hole 210 is disposed on the circuit board 200, the circuit board 200 is connected to the fixing base 350 through a fixing member, and the fixing member is disposed through the fixing hole and the positioning hole 210.

Based on the above example of the present application, the fixing base 350 may fixedly connect the circuit board 200 to the isolation protection cover 300, and in combination with the above supporting structure 340, the connection of the circuit board 200 in the isolation cavity may be more stable and reliable. The fixing holes and the positioning holes 210 may be matched to fix the circuit board 200 using a fixing member. The fixing piece can be in a structure of a screw, a bolt, a screw rod, a rivet and the like. The circuit board 200 may be fixedly connected by a clip, or the like as needed.

The same or similar reference numbers in the drawings correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing is illustrative of the present application and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., which fall within the spirit and principles of the present application.

Claims (10)

1. The circuit breaker is characterized by comprising a shell assembly, a circuit board and an isolation protective cover, wherein the shell assembly comprises a cover body and a base, the cover body is arranged on the base, the cover body and the base are enclosed to form a containing cavity, and the circuit board and the isolation protective cover are arranged in the containing cavity;

The isolation protection cover and the inner wall of the cover body enclose an isolation cavity, and the circuit board is arranged in the isolation cavity;

The isolation protection cover is fixedly connected to the cover body or the base, or the cover body and the base are jointly fixed to the isolation protection cover;

The isolation protective cover is provided with at least one communication port, the communication port can be used for communicating the isolation cavity with the cavity to be communicated, and the connection position of the communication port is isolated and assembled.

2. The circuit breaker according to claim 1, wherein a protective rib is arranged at the edge position of the communication port, an assembly port matched with the communication port is arranged on the chamber to be communicated, and an assembly rib is arranged at the edge position of the assembly port;

The protection ribs are arranged in a staggered mode with the assembly ribs, or the protection ribs are abutted with the assembly ribs, or the protection ribs are connected with the assembly ribs through isolation washers.

3. The circuit breaker of claim 2, wherein a first extension surface is provided on a peripheral side of the protective rib, a second extension surface is provided on a peripheral side of the assembly rib, the protective rib is staggered with the assembly rib, an end surface of the protective rib abuts against the second extension surface, and an end surface of the assembly rib abuts against the first extension surface.

4. The circuit breaker according to claim 1, wherein the chamber to be communicated comprises a communicating cavity arranged on the base, one end of the communicating cavity is communicated with the isolating cavity through the communicating port, and the other end of the communicating cavity penetrates through the bottom wall of the base and is communicated to the outer side of the accommodating cavity; and/or the number of the groups of groups,

The to-be-communicated cavity comprises a transformer installation cavity arranged on the base, the transformer installation cavity is formed by an assembly groove formed in the base and a transformer bracket arranged in the assembly groove, at least one transformer main body is arranged on the transformer bracket, and a connecting wire on the transformer main body is electrically connected to the circuit board through the communication port; and/or the number of the groups of groups,

The cavity to be communicated comprises a top cavity arranged on the cover body, and the top cavity is positioned on the upper side of the isolation cavity.

5. The circuit breaker of claim 4, wherein the inner wall of the cover body is provided with isolation bars matched with the isolation shield, and the isolation bars are staggered with the side walls of the isolation shield.

6. The circuit breaker according to claim 5, wherein the communication port communicating with the top chamber is deviated toward the outer peripheral side of the isolation chamber and forms a connection chamber on which an extension bar integrally provided with the side wall of the isolation cover 300 is provided.

7. The circuit breaker of claim 1, wherein a plurality of support structures are disposed within the isolation chamber, each support structure having a support surface disposed thereon, the support surface being capable of supporting the circuit board.

8. The circuit breaker of claim 1, wherein a plurality of positioning tables are arranged on the periphery of the isolation protection cover, a positioning cavity matched with the positioning tables is arranged on the base, a first positioning surface is arranged on one side, away from the cover body, of the positioning tables, and a limiting convex edge is arranged on the first positioning surface;

the locating table is close to one side of the cover body and is provided with a second locating surface, the second locating surface abuts against the end face of the cover body, which faces towards the base, and the cover body is pressed on the second locating surface and limits the limiting protruding edges in the locating cavity.

9. The circuit breaker of claim 8, wherein the spacing rib is a "T" rib or an "L" rib, the positioning cavity is adapted to the shape of the spacing rib, and each spacing rib defines at least two degrees of freedom of the isolation protection cover relative to the base;

Four positioning tables are arranged on the periphery side of the bottom wall of the isolation protective cover.

10. The circuit breaker of claim 1, wherein a fixing seat is arranged on the inner side of the isolation protection cover, a fixing hole is formed in the fixing seat, a positioning hole is formed in the circuit board, the circuit board is connected with the fixing seat through a fixing piece, and the fixing piece penetrates through the fixing hole and the positioning hole.