阅读说明：本技术 防止线路板被电弧侵蚀的断路器 (Circuit breaker for preventing circuit board from being eroded by electric arc ) 是由 莫洪春 王砚波 宋志文 杜和艳 于 2020-04-21 设计创作，主要内容包括：本发明涉及断路器技术领域,特别是公开了一种防止线路板被电弧侵蚀的断路器,包括壳体、线路板、灭弧系统和触头系统,所述触头系统安装在壳体内,所述壳体上设置有供线路板安装的安装腔,该安装腔由将线路板和触头系统隔开的隔离组件构成。采用上述结构,提供了一种防止线路板被电弧侵蚀的断路器,将线路板安装在独立腔室中,隔离电弧对线路板的侵蚀,使断路器即使遇到大短路电流后,线路板也能够正常工作,漏电特性也不会发生漂移。(The invention relates to the technical field of circuit breakers, and particularly discloses a circuit breaker for preventing a circuit board from being corroded by electric arcs. By adopting the structure, the circuit breaker for preventing the circuit board from being corroded by the electric arc is provided, the circuit board is arranged in the independent chamber, the corrosion of the electric arc to the circuit board is isolated, the circuit board can normally work even if the circuit breaker meets large short-circuit current, and the electric leakage characteristic can not drift.)

1. The utility model provides a prevent circuit board by circuit breaker of electric arc erosion, includes casing, circuit board, arc extinguishing system and contact system install in the casing its characterized in that: the shell is provided with a mounting cavity for mounting the circuit board, and the mounting cavity is composed of an isolation assembly for separating the circuit board from the arc extinguishing system and the contact system.

2. The circuit breaker of claim 1, wherein: the shell comprises a base and a cover body, the arc extinguishing system and the contact system are arranged on the base, and the installation cavity is arranged on the cover body.

3. The circuit breaker of claim 2, wherein: the lid is including closing the well lid on the base and covering the face lid of establishing on well lid, the installation cavity is located between face lid and the well lid.

4. The circuit breaker of claim 3, wherein: the installation cavity is arranged on the side of the handle in the circuit breaker and is aligned with the display button in the circuit breaker, and a through hole for the display button to pass through is formed in the circuit board.

5. The circuit breaker according to claim 3 or 4, wherein: and the middle cover is provided with a lead hole for a lead to pass through.

6. The circuit breaker of claim 5, wherein: the middle cover is provided with a raised annular wall, the annular wall is in concave-convex fit with the surface cover, and the middle cover, the annular wall and the surface cover enclose the installation cavity.

7. The circuit breaker of claim 6, wherein: and a convex rib and a groove which are mutually spliced are arranged between the annular wall and the surface cover.

8. The circuit breaker according to claim 6 or 7, wherein: the lead hole is positioned on the outer side of the annular wall, and a notch communicated with the lead hole is formed in the annular wall.

9. The circuit breaker of claim 3 or 4 or 6 or 7, wherein: and a positioning convex column and an insertion hole which are mutually inserted are arranged between the face cover and the circuit board.

10. The circuit breaker of claim 3 or 4 or 6 or 7, wherein: the surface cover is connected with the middle cover through screws.

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker for preventing a circuit board from being corroded by electric arcs.

Background

At present, a circuit board of a release and a main leakage circuit board are generally arranged in the same cavity including an arc extinguishing system and a contact system in a low-voltage circuit breaker, when the circuit breaker has a large-current short circuit phenomenon, electric arcs generated by opening the contact system cannot all enter the arc extinguishing system, the part of the electric arcs which do not enter the arc extinguishing system can cause serious erosion to the circuit board, the electric arcs which enter the arc extinguishing system cannot all be extinguished, or part of the electric arcs can be leaked, the part of the electric arcs can also cause serious erosion to the circuit board, so that the insulation performance of the circuit board is reduced or failed, the function failure or drift of leakage CBR is caused, and the influence on the main functions of leakage products is extremely serious.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the circuit breaker for preventing the circuit board from being corroded by electric arcs, wherein the circuit board is arranged in an independent chamber, so that the circuit board is prevented from being corroded by the electric arcs, the circuit board can normally work even if the circuit breaker encounters large short-circuit current, and the electric leakage characteristic is effectively prevented from drifting.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a prevent circuit breaker of circuit board by electric arc erosion, includes casing, circuit board, arc extinguishing system and contact system install in the casing, be provided with the installation cavity that supplies the circuit board installation on the casing, this installation cavity comprises the isolation subassembly with circuit board and arc extinguishing system, contact system separation.

In the technical scheme, the circuit board can be a release circuit board or a leakage main circuit board, an independent cavity is arranged on the shell for installing the circuit board, when the breaker generates a large short-circuit current phenomenon, electric arcs generated by opening a contact system and the circuit board are not in the same cavity any more and serious burning loss is not caused to the circuit board any more, a series of adverse conditions of reduction or failure of insulation performance of the circuit board and failure or drifting of CBR function are avoided, and the main functions of a leakage product are well protected.

As a further arrangement of the present invention, the housing includes a base and a cover, the arc extinguishing system and the contact system are disposed on the base, and the mounting cavity is disposed on the cover.

Among the above-mentioned technical scheme, because of the part on the base is more, and the overall arrangement is ripe, so will keep apart the subassembly setting in the lid, just so need not to change the overall arrangement on the base, the base part can continue the structure production among the prior art promptly, only need with the casing produce again can, the input of product upgrading is few, improves product production efficiency.

As a further arrangement of the invention, the cover body comprises a middle cover covered on the base and a surface cover covered on the middle cover, and the mounting cavity is positioned between the surface cover and the middle cover.

Among the above-mentioned technical scheme, arc extinguishing system and contact system are located between base and the well lid, and the circuit board is located between well lid and the face lid, separates circuit board and arc extinguishing system, contact system completely, avoids the circuit board to be corroded, plays fine protection to electric leakage product main function.

As a further arrangement of the invention, the installation cavity is positioned at the side edge of the handle in the circuit breaker and is aligned with the display button in the circuit breaker, and the circuit board is provided with a through hole for the display button to pass through.

Among the above-mentioned technical scheme, the position of installation cavity corresponds with the position of setting up the circuit board on the base among the prior art, is the circuit board directly over among the prior art promptly, and the alignment is directly over here, and the design makes the connection distance shortest like this, and the wiring is simple, optimizes the inner space, realizes the volume miniaturization.

As a further arrangement of the present invention, the middle cover is provided with a lead hole for passing a lead wire.

Among the above-mentioned technical scheme, the setting of pin hole is for the part connection on convenient circuit board and the base, reasonable in design, simple structure.

As a further arrangement of the invention, a raised annular wall is arranged on the middle cover, the annular wall is in concave-convex fit with the surface cover, and the middle cover, the annular wall and the surface cover enclose the installation cavity.

In the technical scheme, the annular wall has a limiting effect on the circuit board, the circuit board is prevented from shifting, and the circuit board is independent of the circuit board and has a better arc prevention effect.

As a further arrangement of the invention, a convex rib and a groove which are mutually inserted are arranged between the annular wall and the surface cover.

Among the above-mentioned technical scheme, the setting of protruding muscle and recess has not only improved the leakproofness, but also has the effect of location.

As a further arrangement of the invention, the lead hole is positioned on the outer side of the annular wall, and the annular wall is provided with a notch communicated with the lead hole.

Among the above-mentioned technical scheme, because of the circuit board is to closely paste the well lid setting, so the pin hole need set up the outside of rampart, and the wire on the circuit board need pass the pin hole and be connected with the part on the base, if do not have the breach, the wire can fold on the rampart, influences the lid between face lid and the well lid and closes, also can increase the thickness of circuit breaker.

As a further arrangement of the invention, a positioning convex column and an insertion hole which are mutually inserted are arranged between the surface cover and the circuit board.

Among the above-mentioned technical scheme, preferred location projection has two at least, and location projection and jack are pegged graft and can not only play the location on the plane, avoid the circuit board to shift, have the effect of pressing the circuit board at the well lid in addition, and here can also adopt modes such as screw or pin riveting to fix the circuit board, simple structure, convenient assembling.

As a further arrangement of the invention, the surface cover and the middle cover are connected through screws.

Among the above-mentioned technical scheme, face lid and well lid also can be other fixed connection's such as joint mode, easy to assemble, firm in connection.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is an exploded view of the structure of an embodiment of the present invention;

FIG. 2 is a block diagram of a base and middle cover in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;

FIG. 4 is a block diagram of a face cover in accordance with an embodiment of the present invention;

FIG. 5 is a structural cross-sectional view of a housing according to an embodiment of the present invention;

FIG. 6 is a block diagram of an embodiment of the present invention.

Detailed Description

The embodiment of the invention is shown in fig. 1-6, and the circuit breaker for preventing the circuit board from being eroded by the electric arc comprises a shell 1, a circuit board 2, an arc extinguishing system 3 and a contact system 4, wherein the arc extinguishing system 3 and the contact system 4 are installed in the shell 1, an installation cavity 11 for installing the circuit board 2 is arranged on the shell 1, and the installation cavity 11 is composed of an isolation component for isolating the circuit board 2, the arc extinguishing system 3 and the contact system 4. The circuit board 2 here can be release circuit board 2 also can be electric leakage main circuit board 2, set up an independent cavity on casing 1 and supply circuit board 2 to install, when the circuit breaker takes place big short-circuit current phenomenon, because of electric arc that contact system 4 opened and produced and circuit board 2 no longer are in same cavity and no longer cause serious burning loss to circuit board 2, avoid circuit board 2 insulating properties to descend or lose efficacy and CBR function failure or a series of unfavorable condition emergence of drifting, play fine protection to electric leakage product main function.

The housing 1 comprises a base 12 and a cover 13, the arc extinguishing system 3 and the contact system 4 are arranged on the base 12, and the mounting cavity 11 is arranged on the cover 13. Because the parts on the base 12 are more, and the overall arrangement is mature, so the isolation component is arranged in the cover body 13, the overall arrangement on the base 12 does not need to be changed, namely the base 12 part can continue the structural production in the prior art, only the shell 1 needs to be produced again, the investment of product upgrading is less, and the production efficiency of products is improved.

The cover 13 includes a middle cover 131 covering the base 12 and a surface cover 132 covering the middle cover 131, and the installation cavity 11 is located between the surface cover 132 and the middle cover 131. The arc extinguishing system 3 and the contact system 4 are located between the base 12 and the middle cover 131, the circuit board 2 is located between the middle cover 131 and the surface cover 132, the circuit board 2 is completely separated from the arc extinguishing system 3 and the contact system 4, the circuit board 2 is prevented from being corroded, and the main functions of a leakage product are well protected.

Above-mentioned installation cavity 11 is arranged in the circuit breaker the side of handle a, and with the circuit breaker in show button b and align the setting, set up on the circuit board 2 by supplying to show the through-hole 21 that button b passed. The front cover 132132 is provided with a through hole 1321 for the handle to pass through, the two corresponding sides of the front cover 132132 are provided with an insertion block 1322 and an insertion slot 121 which are matched with the base 12, so that the positioning function is achieved, the position of the installation cavity 11 corresponds to the position of the circuit board 2 arranged on the base 12 in the prior art, namely, the position is right above the circuit board 2 in the prior art, and the position is aligned directly above the circuit board 2 in the prior art.

The middle cap 131 is provided with a lead hole 1311 through which a lead wire passes. The lead holes 1311 are provided for facilitating connection of the circuit board 2 to components on the base 12, and are reasonable in design and simple in structure.

The middle cover 131 is provided with a raised annular wall 1312, the annular wall 1312 is in concave-convex fit with the surface cover 132132, and the middle cover 131, the annular wall 1312 and the surface cover 132132 enclose the installation cavity 11. The ring wall 1312 has a limiting effect on the circuit board 2, so that the circuit board 2 is prevented from moving, and the circuit board is independent of the circuit board and has a better arc prevention effect.

The annular wall 1312 and the cover 132 are provided with a rib 1323 and a groove 1312b which are inserted into each other. The arrangement of the ribs 1323 and the grooves 1312b not only improves the sealing performance, but also has a positioning function.

The lead hole 1311 is located outside the ring wall 1312, and the ring wall 1312 is provided with a notch 1312a communicating with the lead hole 1311. Since the circuit board 2 is to be closely attached to the middle cover 131, the lead holes 1311 need to be disposed outside the ring wall 1312, the wires on the circuit board 2 need to pass through the lead holes 1311 to be connected to the components on the base 12, and if there is no notch 1312a, the wires are stacked on the ring wall 1312, which affects the covering between the surface cover 132 and the middle cover 131, and also increases the thickness of the circuit breaker.

The positioning boss 1324 and the insertion hole 22 are disposed between the surface cover 132 and the circuit board 2. At least two positioning convex columns 1324 are preferably selected, the positioning convex columns 1324 are inserted into the insertion holes 22, so that the planar positioning can be achieved, the circuit board 2 is prevented from shifting, the circuit board 2 is pressed on the middle cover 131, the circuit board 2 can be fixed by adopting the modes of riveting screws or pins and the like, the structure is simple, and the assembly is convenient.

The surface cover 132 is connected to the middle cover 131 by screws. The surface cover 132 and the middle cover 131 can be fixedly connected in a clamping manner and the like, so that the installation is convenient and the connection is firm.

The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.