Circuit board protective cover and electrical switch

Abstract

The utility model provides a circuit board protective cover and an electrical switch, and relates to the technical field of distributors. The electrical switch comprises a first voltage area, a second voltage area and a circuit board, the circuit board is located in the first voltage area, and a transition position is arranged between the first voltage area and the second voltage area. The circuit board protective cover is applied to the electrical switch and comprises a cover body, an outer cover and a blocking structure. The cover body comprises an accommodating cavity which is used for accommodating the circuit board. The outer cover is located at a cavity opening of the containing cavity and used for shielding the cavity opening. The blocking structure is arranged on the outer cover and the cover body, the blocking structure is arranged close to the transition position, and the blocking structure is used for electrically isolating the first voltage area and the second voltage area. The circuit board protective cover aims at improving the protective effect of the protective cover on the circuit board, so that the risk of electrical breakdown between the circuit board and other electrified parts is reduced, and normal use of a circuit breaker is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of power distributors, and in particular to a circuit board protective cover and an electrical switch. Background Art

[0002] As the size of circuit breakers develops towards miniaturization, the design dimensions of various components inside the circuit breaker are restricted. Under the premise of meeting various control functions of the circuit breaker, it is necessary to conduct dielectric tests on the components inside the circuit breaker, requiring sufficient electrical clearance and creepage distance between each live component. For example, it is necessary to maintain sufficient electrical clearance and creepage distance between the circuit board with weak current and other components with strong current in the circuit breaker.

[0003] Therefore, the circuit board is usually installed in a protective cover with insulating properties to achieve electrical isolation between the circuit board and other live parts. However, in the prior art, the protective cover has a poor protective effect on the circuit board, so that there is still a possibility of electrical breakdown between the circuit board and other live parts, affecting the normal use of the circuit breaker. Utility Model Content

[0004] The present application provides a circuit board protective cover and an electrical switch, aiming to enhance the protective effect of the protective cover on the circuit board, so as to reduce the risk of electrical breakdown between the circuit board and other live parts, and ensure the normal use of the circuit breaker.

[0005] In a first aspect, the present application provides a circuit board protective cover, which is applied to an electrical switch, the electrical switch includes a first voltage region, a second voltage region and a circuit board, the circuit board is located in the first voltage region, and there is a transition between the first voltage region and the second voltage region, the circuit board protective cover includes a cover body, an outer cover and a blocking structure. The cover body includes a accommodating cavity, and the accommodating cavity is used to accommodate the circuit board. The outer cover is located at the cavity opening of the accommodating cavity, and the outer cover is used to cover the cavity opening. The blocking structure is provided on the outer cover and the cover body, and the blocking structure is provided near the transition, and the blocking structure is used to electrically isolate the first voltage region and the second voltage region.

[0006] With the circuit board protective cover provided by the first aspect, the circuit board is located in the accommodating cavity of the cover body, and the outer cover is located at the cavity opening of the accommodating cavity and blocks the cavity opening. In this way, the cover body and the outer cover can protect the circuit board and reduce the impact of environmental factors such as impurities and moisture on the circuit board. More importantly, a blocking structure is set at a position near the transition between the outer cover and the cover body, and the charged particles in the second voltage region can be blocked by the blocking structure, so that the charged particles in the second voltage region are not easy to enter the first voltage region from between the cover body and the outer cover. In other words, the first voltage region and the second voltage region can be electrically isolated by the blocking structure, reducing the charged particles in the second voltage region from entering the first voltage region, and the risk of electrical breakdown between the circuit board located in the first voltage region and other charged components located in the second voltage region, thereby ensuring the normal use of the circuit breaker.

[0007] In a possible design, the blocking structure is configured as a connecting plate, one side of the connecting plate is integrally connected to a side of the cover body near the transition, and the other side of the connecting plate is integrally connected to a side of the outer cover near the transition.

[0008] With the circuit board protective cover provided by this embodiment, the connecting plate is arranged between the cover body and the outer cover in an integral connection manner, which is easy to be processed and formed in one go, and has high processing efficiency. In addition, the integral connection manner makes it possible to have no gap between the connecting plate and the cover body, and no gap between the connecting plate and the outer cover, so that there is no gap between the cover body and the connecting plate for charged particles to pass through, so that the connecting plate can well separate the circuit board in the cover body from other components with strong electricity, and can effectively reduce the risk of electrical breakdown between the circuit board and other devices with strong electricity, thereby preventing the circuit board in the cover body from being affected by other components with strong electricity, and ensuring the normal use of the circuit breaker.

[0009] In a possible design, the blocking structure includes a rotating column and a rotating cavity, wherein the rotating column is connected to a side of the outer cover near the transition, the rotating cavity is provided at a position of the cover body corresponding to the rotating column, and the rotating column is inserted into the rotating cavity. Alternatively, the rotating column is connected to a side of the cover body near the transition, the rotating cavity is provided at a position of the outer cover corresponding to the rotating column, and the rotating column is inserted into the rotating cavity.

[0010] Through the circuit board protective cover provided by this embodiment, the blocking structure is set to cooperate with the plug-in rotating column and the rotating cavity, which enriches the structural form of the blocking structure and makes the setting of the blocking structure more flexible. The rotating column is inserted into the rotating cavity and rotates relative to each other to a certain extent, so that the outer cover can cover the cavity of the cover body, so that the outer cover protects the circuit board inside the cover body. Through this blocking structure, the installation steps are simple, not only it is easy to achieve the fixation between the cover body and the outer cover, but also it can increase the creepage distance between the first voltage area and the second voltage area, so that the blocking structure blocks the charged particles in the second voltage area, so that the charged particles in the second voltage area are not easy to enter the first voltage area from between the cover body and the outer cover. In other words, the first voltage area and the second voltage area can be electrically isolated through the blocking structure, and the risk of electrical breakdown between the circuit board located in the first voltage area and other charged parts located in the second voltage area is reduced, so as to ensure the normal use of the circuit breaker.

[0011] In a possible design, the blocking structure includes a plug-in board and a plug-in slot, wherein the plug-in board is connected to one side of the outer cover near the transition, the plug-in slot is provided at a position corresponding to the cover body and the plug-in board, and the plug-in board is inserted into the plug-in slot. Alternatively, the plug-in board is connected to one side of the cover body near the transition, the plug-in slot is provided at a position corresponding to the outer cover and the plug-in board, and the plug-in board is inserted into the plug-in slot.

[0012] The circuit board protective cover provided by this embodiment enriches the structural form of the blocking structure by setting a mating plug-in board and a plug-in slot between the cover body and the outer cover, making the setting of the blocking structure more flexible. The fixing of the outer cover on the cover body can not only reduce the gap between the outer cover and the cover body, reduce the impurities and moisture in the air from entering the cover body and causing erosion to the circuit board, but also block the charged particles in the second voltage area, so that the charged particles in the second voltage area do not have to enter the first voltage area through the plug-in board and the plug-in slot. In other words, the first voltage area and the second voltage area can be electrically isolated by the blocking structure, reducing the charged particles in the second voltage area from entering the first voltage area, and reducing the risk of electrical breakdown between the circuit board in the first voltage area and other charged components in the second voltage area, thereby ensuring the normal use of the circuit breaker.

[0013] In a possible design, when the plug board is connected to the outer cover, the plug board is integrally formed on one side of the outer cover near the transition. When the plug board is connected to the cover, the plug board is integrally formed on one side of the cover near the transition.

[0014] The circuit board protective cover provided by this embodiment can reduce the production of parts, simplify the assembly steps, and improve the efficiency of processing and assembly by integrally forming the plug board on the outer cover or the cover. At the same time, the one-piece design can also reduce the gap between the plug board and the outer cover or the cover, so that the charged particles in the second voltage area are not easy to enter the first voltage area from between the cover and the outer cover. In other words, the one-piece structure can electrically isolate the first voltage area from the second voltage area, and reduce the risk of electrical breakdown between the circuit board located in the first voltage area and other charged components located in the second voltage area, thereby ensuring the normal use of the circuit breaker.

[0015] In a possible design, the blocking structure further includes a sealing gasket, which is disposed between the outer cover and the cover body, with one side of the sealing gasket contacting a side of the outer cover facing the cover body, and the other side of the sealing gasket contacting a side of the cover body facing the outer cover.

[0016] The circuit board protective cover provided by this embodiment provides a sealing gasket between the outer cover and the cover body, and one side of the sealing gasket is in contact with the side of the outer cover facing the cover body, and the other side of the sealing gasket is in contact with the side of the cover body facing the outer cover, and there is no gap between the sealing gasket and the outer cover, and between the sealing gasket and the cover body, so that charged particles in the second voltage area are not allowed to enter the first voltage area. In other words, the sealing gasket can electrically isolate the first voltage area and the second voltage area, and the risk of electrical breakdown between the circuit board located in the first voltage area and other charged components located in the second voltage area is reduced, thereby ensuring the normal use of the circuit breaker. At the same time, when the outer cover blocks the cavity of the cover body, the sealing gasket is compressed, which can fill the gap or unevenness between the cover body and the outer cover, thereby forming an effective sealing boundary, which can reduce the erosion of the circuit board caused by impurities and moisture entering the cover body.

[0017] In a possible design, the blocking structure further includes a sealing groove, which is provided on a side of the outer cover facing the cover body. And / or, the sealing groove is provided on a side of the cover body facing the outer cover, and the sealing gasket is at least partially located in the sealing groove.

[0018] The circuit board protective cover provided by this embodiment, by only opening a sealing groove on the cover body, only opening a sealing groove on the outer cover, or opening a sealing groove on both the cover body and the outer cover, one side or both sides of the sealing gasket are placed in the sealing groove, which can play a certain positioning effect on the fixation of the sealing gasket and improve the stability of the sealing gasket during use. At the same time, the gap between the sealing gasket and the cover body or the outer cover can be reduced to prevent dust, moisture and other harmful substances from entering the interior of the cover body. In addition, the creepage distance between the first voltage region and the second voltage region can be increased, so that the blocking structure blocks the charged particles in the second voltage region, so that the charged particles in the second voltage region are not easy to enter the first voltage region from between the cover body and the outer cover. In other words, the first voltage region and the second voltage region can be electrically isolated, and the risk of electrical breakdown between the circuit board located in the first voltage region and other charged components located in the second voltage region is reduced, thereby ensuring the normal use of the circuit breaker.

[0019] In a possible design, the circuit board protective cover further includes a hook and a buckle that cooperate with each other, the hook is arranged on a side of the outer cover away from the transition, and the buckle is arranged on a side of the cover body away from the transition. And / or, the hook is arranged on a side of the cover body away from the transition, and the buckle is arranged on a side of the outer cover away from the transition.

[0020] The circuit board protective cover provided by this embodiment has a simple fixing method through the mutually cooperating hooks and buckles, so that the side of the outer cover away from the transition is fixed on the cover body, which can not only improve the stability of the outer cover on the cover body, but also quickly achieve the locking or unlocking of the outer cover on the cover body, thereby improving the installation efficiency of the outer cover on the cover body. At the same time, through the mutually cooperating hooks and buckles, it can prevent the outer cover from falling off the cover body due to looseness, thereby improving the protective effect of the cover body on the circuit board.

[0021] In a second aspect, the present application provides an electrical switch, comprising a circuit board and the circuit board protective cover of the first aspect, wherein the circuit board is located inside the circuit board protective cover.

[0022] With the electrical switch provided in this embodiment, the circuit board protective cover can not only be used to accommodate the circuit board, but also can protect the circuit board, thereby reducing the possibility of damage to the circuit board caused by being exposed to the outside.

[0023] In one possible design, the electrical switch also includes a shell, the circuit board protective cover is located inside the shell, one of the shell and the cover body of the circuit board protective cover is provided with a slide groove, and the other of the shell and the cover body is provided with a slide rail, and the slide rail cooperates with the slide groove.

[0024] The electrical switch provided by this embodiment simplifies the assembly process of the circuit board protective cover by setting matching slide rails and slide grooves between the shell and the cover body of the circuit board protective cover, so that the cover body can be accurately positioned and installed in the shell, which can improve the installation stability of the cover body in the shell, thereby improving the installation stability of the circuit board and reducing damage to the circuit board due to shaking in the cover body.

[0025] The beneficial effects of the electrical switch provided in each possible design of the second aspect can be referred to the beneficial effects brought about by each possible implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a circuit board protective cover provided in an embodiment of the present application.

[0027] Figure 2 A side view of a circuit board protective cover provided in an embodiment of the present application.

[0028] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0029] Figure 4 A partial cross-sectional view of a circuit board protective cover provided in an embodiment of the present application.

[0030] Figure 5 A partial exploded cross-sectional view of a circuit board protective cover provided in an embodiment of the present application.

[0031] Figure 6 A partial exploded cross-sectional view of another embodiment of a circuit board protective cover provided in an embodiment of the present application.

[0032] Figure 7 for Figure 1 Section view of the AA plane.

[0033] Description of reference numerals:

[0034] 100, cover body; 110, accommodating chamber; 120, slide rail;

[0035] 200, outer cover;

[0036] 300, blocking structure; 310, connecting plate; 320, rotating column; 330, rotating cavity; 340, plug-in plate; 350, plug-in slot;

[0037] 400, hook;

[0038] 500. Buckle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0046] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts or other barrier; the physical connection may also be a detachable connection, such as a mutual snap-on or snap-on connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0047] A circuit board protective cover is provided in the prior art, which includes a cover body and an outer cover. A receiving cavity is provided inside the cover body, and the circuit board can be installed in the receiving cavity of the cover body. The outer cover is used to cover the opening of the receiving cavity to prevent other devices in the circuit breaker from having electrical breakdown with the circuit board in the cover body, thereby affecting the normal use of the circuit breaker.

[0048] In the above scheme, despite the protection of the protective cover, there is still a risk of electrical breakdown between the circuit board and other live parts with strong electricity. Therefore, further measures need to be taken to prevent this from happening.

[0049] Based on this, the present application provides a circuit board protective cover, which sets a blocking structure at the transition between the first voltage area and the second voltage area so that the blocking structure electrically isolates the first voltage area and the second voltage area, so as to enhance the protective effect of the circuit board protective cover on the circuit board, reduce the risk of electrical breakdown between the circuit board and other live parts, and ensure the normal use of the circuit breaker.

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0051] Figure 1 A schematic diagram of a circuit board protective cover provided in an embodiment of the present application, the circuit board protective cover is applied to an electrical switch, the electrical switch may be a circuit breaker or a contactor or other switch capable of breaking a circuit, which is not limited in the embodiments of the present application. Moreover, the present application is described only by taking a circuit breaker as an example, but does not constitute a limitation on the technical solution of the present application.

[0052] In the present application, the electrical switch includes a first voltage region, a second voltage region and a circuit board. The circuit board is located in the first voltage region, and there is a transition between the first voltage region and the second voltage region.

[0053] The first voltage region and the second voltage region may both be high voltage regions, the first voltage region and the second voltage region may both be low voltage regions, or one of the first voltage region and the second voltage region may be a high voltage region and the other a low voltage region.

[0054] For example, a circuit board may be provided with many electrical components, and the operating voltage of these electrical components is often low voltage, so the area where the circuit board is located can be called a low voltage area.

[0055] The electrical switch also includes high-voltage components such as coils, normally open contacts, normally closed contacts, and armatures. The area where these high-voltage components are located can be called a high-voltage area.

[0056] The boundary between the first voltage region and the second voltage region is a transition point between the first voltage region and the second voltage region.

[0057] like Figure 1 As shown, the circuit board protective cover may include a cover body 100, an outer cover 200 and a blocking structure 300. The cover body 100 includes a receiving cavity 100, the receiving cavity 100 is used to receive a circuit board (not shown in the figure), the outer cover 200 is located at the cavity opening of the receiving cavity 100, and the outer cover 200 is used to cover the cavity opening. The blocking structure 300 is provided on the outer cover 200 and the cover body 100, and the blocking structure 300 is provided near the transition, and the blocking structure 300 is used to electrically isolate the first voltage region and the second voltage region.

[0058] The housing 100 may include one or more accommodating cavities 100, and the number of the circuit boards may be one or more. For example, when the housing 100 includes one accommodating cavity 100 and the number of the circuit board is one, the circuit board is placed in the accommodating cavity 100. When the housing 100 includes two accommodating cavities 100 and the number of the circuit boards is two, the first circuit board is placed in the first accommodating cavity 100, and the second circuit board is placed in the second accommodating cavity 100.

[0059] The cover 100 can be made of plastic or other materials with insulating properties. The cover 100 can be designed according to the shape of the circuit board to be protected, so that the cover 100 can cover the entire circuit board.

[0060] The outer cover 200 can also be made of plastic or other materials with insulating properties, and its size and shape can be designed according to the size and shape of the cavity opening of the cover body 100, so that the outer cover 200 can completely cover the cavity opening, reduce the entry of external substances into the interior of the accommodating cavity 100, and protect the circuit board from environmental factors such as impurities and moisture.

[0061] Similar to the housing 100 and the outer cover 200, the blocking structure 300 may also be made of plastic or other insulating materials. For example, the blocking structure 300 may be an insulating plate, an insulating spacer, or other similar insulating devices, which can reduce the risk of electrical breakdown between the first voltage region and the second voltage region.

[0062] In the embodiment of the present application, the circuit board is located in the accommodating cavity 100 of the cover 100, and the outer cover 200 is located at the cavity opening of the accommodating cavity 100 and blocks the cavity opening. In this way, the cover 100 and the outer cover 200 can protect the circuit board and reduce the influence of environmental factors such as impurities and moisture on the circuit board. More importantly, a blocking structure 300 is set at the position near the transition between the outer cover 200 and the cover 100. The blocking structure 300 can block the charged particles in the second voltage region, so that the charged particles in the second voltage region are not easy to enter the first voltage region from between the cover 100 and the outer cover 200. In other words, the first voltage region and the second voltage region can be electrically isolated by the blocking structure 300, reducing the charged particles in the second voltage region from entering the first voltage region, and the risk of electrical breakdown between the circuit board located in the first voltage region and other charged components located in the second voltage region, thereby ensuring the normal use of the circuit breaker.

[0063] The blocking structure 300 has various structural forms, and possible structural forms of the blocking structure 300 will be introduced below in conjunction with the accompanying drawings.

[0064] The first possible structural form: Figure 1 As shown, the blocking structure 300 can be configured as a connecting plate 310, one side of the connecting plate 310 is integrally connected to one side of the cover body 100 near the transition, and the other side of the connecting plate 310 is integrally connected to one side of the outer cover 200 near the transition.

[0065] The connecting plate 310 can be a flat plate, a U-shaped plate, a thin-walled plate or other structures.

[0066] The thickness of the connection plate 310 at different locations may be the same or different. Figure 2 A side view of a circuit board protective cover provided in an embodiment of the present application, Figure 3 for Figure 2 The enlarged view of the middle A part is shown as an example. Figure 2 and Figure 3As shown, the thickness of the connecting plate 310 increases from the side close to the cover body 100 to the side away from the cover body 100. Of course, the thickness of the connecting plate 310 may also decrease from the side close to the cover body 100 to the side away from the cover body 100.

[0067] In the embodiment of the present application, the connecting plate 310 is arranged between the cover body 100 and the outer cover 200 in an integral connection manner, which is easy to be processed and formed in one go, and has high processing efficiency. In addition, the integral connection manner makes it possible to have no gap between the connecting plate 310 and the cover body 100, and to have no gap between the connecting plate 310 and the outer cover 200, so that there is no gap between the cover body 100 and the connecting plate 310 for charged particles to pass through, so that the connecting plate 310 can well separate the circuit board in the cover body 100 from other components with strong electricity, and can effectively reduce the risk of electrical breakdown between the circuit board and other devices with strong electricity, thereby preventing the circuit board in the cover body 100 from being affected by other components with strong electricity, and ensuring the normal use of the circuit breaker.

[0068] The second possible structure is: Figure 4 A partial cross-sectional view of a circuit board protective cover provided in an embodiment of the present application, such as Figure 4 As shown, the blocking structure 300 may include a rotating column 320 and a rotating cavity 330. In some possible cases, the rotating column 320 may be connected to one side of the outer cover 200 close to the transition point, and the rotating cavity 330 is arranged at a position corresponding to the cover body 100 and the rotating column 320, and the rotating column 320 is inserted into the rotating cavity 330.

[0069] The side wall of the rotating column 320 and the outer cover 200 may be detachably connected or integrally connected, and the cross section of the rotating column 320 is circular.

[0070] The rotating cavity 330 may be formed on the inner wall of the cover body 100, on the outer wall of the cover body 100, or on the cavity opening side of the cover body 100. The rotating cavity 330 may be configured as a cylindrical cavity capable of accommodating the rotating column 320.

[0071] In some other possible cases, the rotating post 320 may be connected to one side of the cover body 100 close to the transition portion, the rotating cavity 330 is disposed at a position of the outer cover 200 corresponding to the rotating post 320 , and the rotating post 320 is inserted into the rotating cavity 330 .

[0072] The connection mode of the rotating column 320 and the cover 100 is similar to the connection mode of the rotating column 320 and the outer cover 200, which will not be described in detail here. In addition, the opening position of the rotating cavity 330 on the outer cover 200 is similar to the opening position of the rotating cavity 330 on the cover 100, which will not be described in detail here.

[0073] For any of the above situations, the rotating column 320 is inserted into the rotating cavity 330, and the outer cover 200 is adjusted so that the outer cover 200 blocks the cavity opening of the cover body 100, thereby realizing the installation of the outer cover 200 on the cover body 100, so that the outer cover 200 protects the circuit board inside the cover body 100.

[0074] In this embodiment, the blocking structure 300 is configured to cooperate with the plug-in rotating column 320 and the rotating cavity 330, which enriches the structural form of the blocking structure 300 and makes the setting of the blocking structure 300 more flexible. The rotating column 320 is inserted into the rotating cavity 330, and a certain degree of relative rotation occurs, so that the outer cover 200 can cover the cavity opening of the cover body 100, so that the outer cover 200 protects the circuit board inside the cover body 100. Through the blocking structure 300, the installation steps are simple, not only it is easy to achieve the fixation between the cover body 100 and the outer cover 200, but also the creepage distance between the first voltage area and the second voltage area can be increased, so that the blocking structure 300 blocks the charged particles in the second voltage area, so that the charged particles in the second voltage area are not easy to enter the first voltage area from between the cover body 100 and the outer cover 200. That is to say, the blocking structure 300 can electrically isolate the first voltage region and the second voltage region, thereby reducing the risk of electrical breakdown between the circuit board in the first voltage region and other live components in the second voltage region, thereby ensuring the normal use of the circuit breaker.

[0075] The third possible structure is: Figure 5 A partial exploded cross-sectional view of a circuit board protective cover provided in an embodiment of the present application, such as Figure 5 As shown, the blocking structure 300 may include a plug-in board 340 and a plug-in slot 350. In some possible cases, the plug-in board 340 is connected to one side of the outer cover 200 near the transition point, and the plug-in slot 350 is arranged at a position corresponding to the cover body 100 and the plug-in board 340, and the plug-in board 340 is inserted into the plug-in slot 350.

[0076] The plug board 340 and the outer cover 200 may be detachably connected or integrally connected.

[0077] The plug board 340 and the outer cover 200 can be connected in an integral manner, which is easy to process and shape at one time, thereby reducing the gap between the plug board 340 and the outer cover 200, and further improving the sealing between the plug board 340 and the outer cover 200.

[0078] The cross section of the plug slot 350 can be square, rectangular or trapezoidal. Therefore, the cross section of the plug board 340 can also be a corresponding square, rectangular or trapezoidal. Thus, the plug board 340 is inserted into the plug slot 350 to complete the installation of the outer cover 200 on the cover body 100.

[0079] In other possible cases, Figure 6 A partial exploded cross-sectional view of another embodiment of a circuit board protective cover provided in an embodiment of the present application, such as Figure 6 As shown, the plug-in board 340 is connected to one side of the cover body 100 close to the transition portion, the plug-in slot 350 is provided at a position corresponding to the outer cover 200 and the plug-in board 340 , and the plug-in board 340 is inserted into the plug-in slot 350 .

[0080] The connection mode of the plug board 340 and the cover 100 is similar to the connection mode of the plug board 340 and the outer cover 200, which will not be described in detail here. In addition, the opening position of the plug slot 350 on the outer cover 200 is similar to the opening position of the plug slot 350 on the cover 100, which will not be described in detail here.

[0081] For any of the above situations, the plug board 340 is inserted into the plug slot 350 so that the outer cover 200 blocks the opening of the cover body 100 , thereby installing the outer cover 200 on the cover body 100 and protecting the circuit board inside the cover body 100 .

[0082] In the embodiment of the present application, by providing a plug-in board 340 and a plug-in slot 350 for mating between the cover body 100 and the outer cover 200, the structural form of the blocking structure 300 is enriched, and the setting of the blocking structure 300 is made more flexible. The fixing of the outer cover 200 on the cover body 100 can not only reduce the gap between the outer cover 200 and the cover body 100, and reduce the impurities and moisture in the air from entering the cover body 100 to cause erosion to the circuit board, but also block the charged particles in the second voltage region, so that the charged particles in the second voltage region do not have to enter the first voltage region from the plug-in board 340 and the plug-in slot 350. In other words, the first voltage region and the second voltage region can be electrically isolated by the blocking structure 300, reducing the risk of charged particles in the second voltage region entering the first voltage region and causing electrical breakdown between the circuit board in the first voltage region and other charged components in the second voltage region, thereby ensuring the normal use of the circuit breaker.

[0083] In one embodiment, when the plug board 340 is connected to the outer cover 200, the plug board 340 is integrally formed on one side of the outer cover 200 near the transition. When the plug board 340 is connected to the cover 100, the plug board 340 is integrally formed on one side of the cover 100 near the transition.

[0084] The plug board 340 may be integrally formed on the outer cover 200 or integrally formed on the housing 100 .

[0085] After the circuit board is placed in the accommodating cavity 100 of the housing 100, the plug board 340 is plugged in accordingly, and the outer cover 200 can be installed on the housing 100. Since the plug board 340 has formed a single component with the outer cover 200 or the housing 100, it is no longer necessary to install the plug board 340 separately, which can simplify the installation steps.

[0086] In the embodiment of the present application, by integrally forming the plug board 340 on the outer cover 200 or integrally forming it on the cover body 100, the production of parts can be reduced, the assembly steps can be simplified, and the efficiency of processing and assembly can be improved. At the same time, the one-piece design can also reduce the gap between the plug board 340 and the outer cover 200 or the cover body 100, so that the charged particles in the second voltage area are not easy to enter the first voltage area from between the cover body 100 and the outer cover 200. In other words, the one-piece structure can electrically isolate the first voltage area from the second voltage area, and reduce the risk of electrical breakdown between the circuit board located in the first voltage area and other charged components located in the second voltage area, thereby ensuring the normal use of the circuit breaker.

[0087] Furthermore, when the blocking structure 300 is connected to the outer cover 200 and the cover body 100 in a detachable manner, in one embodiment, the blocking structure 300 may also include a sealing gasket, which is arranged between the outer cover 200 and the cover body 100, and one side of the sealing gasket is in contact with the side of the outer cover 200 facing the cover body 100, and the other side of the sealing gasket is in contact with the side of the cover body 100 facing the outer cover 200.

[0088] The sealing gasket can be configured as a rubber sealing ring, a silicone sealing ring, a thermoplastic elastomer sealing ring, etc.

[0089] When the sealing gasket is arranged between the outer cover 200 and the cover body 100, the sealing gasket may only abut against the outer cover 200 and the cover body 100 without being connected to the outer cover 200 and the cover body 100. Of course, the sealing gasket may also be connected to the outer cover 200 by bonding or bolting, or connected to the cover body 100 by bonding or bolting.

[0090] The sealing gasket may be disposed only on one side close to the transition portion, or may be disposed on all contact surfaces between the cover body 100 and the outer cover 200 .

[0091] In this embodiment, a sealing gasket is provided between the outer cover 200 and the cover body 100, and one side of the sealing gasket is in contact with the side of the outer cover 200 facing the cover body 100, and the other side of the sealing gasket is in contact with the side of the cover body 100 facing the outer cover 200, and there is no gap between the sealing gasket and the outer cover 200, and between the sealing gasket and the cover body 100, so that the charged particles in the second voltage region are not allowed to enter the first voltage region. In other words, the sealing gasket can be used to electrically isolate the first voltage region from the second voltage region, and the risk of electrical breakdown between the circuit board located in the first voltage region and other charged components located in the second voltage region is reduced, thereby ensuring the normal use of the circuit breaker. At the same time, when the outer cover 200 blocks the cavity of the cover body 100, the sealing gasket is compressed, which can fill the gap or unevenness between the cover body 100 and the outer cover 200, thereby forming an effective sealing boundary, which can reduce the erosion of the circuit board caused by impurities and moisture entering the cover body 100.

[0092] In a possible embodiment, in some possible cases, the blocking structure 300 may further include a sealing groove, which is opened on the outer cover 200 .

[0093] The sealing groove is formed on the outer cover 200 , and the position of the sealing groove corresponds to the position of the sealing gasket, and the cross section of the sealing groove may be the same as the cross section of the bottom of the sealing gasket.

[0094] In some other possible embodiments, the sealing groove may be provided on the cover body 100. The sealing gasket is at least partially located in the sealing groove. The sealing groove is provided on the side of the cover body 100 facing the outer cover 200, and the sealing gasket is at least partially located in the sealing groove.

[0095] When the sealing groove is formed on the cover body 100, the position of the sealing groove corresponds to the position of the sealing gasket, the cross section of the sealing groove may be the same as the cross section of the bottom of the sealing gasket, and the sealing gasket is at least partially disposed in the sealing groove.

[0096] In some other possible embodiments, the sealing groove may be respectively provided on the cover body 100 and the outer cover 200, and the position of the sealing groove corresponds to the position of the sealing gasket.

[0097] In the embodiment of the present application, by only opening a sealing groove on the cover 100, only opening a sealing groove on the outer cover 200, or opening a sealing groove on both the cover 100 and the outer cover 200, one side or both sides of the sealing gasket are placed in the sealing groove, which can play a certain positioning effect on the fixation of the sealing gasket and improve the stability of the sealing gasket during use. At the same time, the gap between the sealing gasket and the cover 100 or the outer cover 200 can be reduced to prevent dust, moisture and other harmful substances from entering the interior of the cover 100. In addition, the creepage distance between the first voltage region and the second voltage region can be increased, so that the blocking structure 300 blocks the charged particles in the second voltage region, so that the charged particles in the second voltage region are not easy to enter the first voltage region from between the cover 100 and the outer cover 200. In other words, the first voltage region and the second voltage region can be electrically isolated, and the risk of electrical breakdown between the circuit board located in the first voltage region and other charged components located in the second voltage region is reduced, thereby ensuring the normal use of the circuit breaker.

[0098] In one embodiment, the circuit board protective cover further includes a hook 400 and a buckle 500 that cooperate with each other. In some possible cases, for example, Figure 1 As shown, the hook 400 is arranged on a side of the outer cover 200 away from the transition portion, and the buckle 500 is arranged on a side of the cover body 100 away from the transition portion.

[0099] Specifically, the number of groups of the hook 400 and the buckle 500 can be one group or multiple groups. The hook 400 is provided with a slot (not marked in the figure) that cooperates with the buckle 500 and is fixed. The slot can be circular, square or rectangular. Therefore, the structure of the buckle 500 can also be correspondingly circular, square or rectangular.

[0100] The number of the hook 400 can be one or more, and the position and number of the hook 400 correspond to the buckle 500. The buckle 500 is provided with an inclined surface (not shown in the figure) on one side close to the hook 400, which facilitates the front end of the hook 400 to pass through, thereby making the rear end of the hook 400 clamped on the buckle 500.

[0101] When in use, adjust the outer cover 200 so that it covers the cavity opening. When the hook 400 contacts the buckle 500, the hook 400 is deformed to a certain extent, and then the buckle 500 enters the slot. The hook 400 recovers its deformation, and the hook 400 and the buckle 500 are engaged, completing the installation of the outer cover 200 on the cover body 100.

[0102] In another possible embodiment, the hook 400 is disposed on a side of the cover body 100 away from the transition portion, and the buckle 500 is disposed on a side of the outer cover 200 away from the transition portion.

[0103] The connection mode of the hook 400 and the cover 100 is similar to the connection mode of the hook 400 and the outer cover 200, which will not be described in detail here. In addition, the connection mode of the buckle 500 and the outer cover 200 is similar to the connection mode of the buckle 500 and the cover 100, which will not be described in detail here.

[0104] In another possible embodiment, the hook 400 and the buckle 500 are provided as at least two groups, that is, the hook 400 and the buckle 500 can be provided on the cover body 100 at the same time, and can also be provided on the outer cover 200 at the same time, and the hook 400 and the buckle 500 correspond one to one.

[0105] In the embodiment of the present application, the hook 400 and the buckle 500 cooperate with each other, and the fixing method is simple, so that the side of the outer cover 200 away from the transition point is fixed on the cover body 100, which can not only improve the stability of the outer cover 200 on the cover body 100, but also quickly realize the locking or unlocking of the outer cover 200 on the cover body 100, thereby improving the installation efficiency of the outer cover 200 on the cover body 100. At the same time, the hook 400 and the buckle 500 cooperate with each other, so as to prevent the outer cover 200 from falling off the cover body 100 due to looseness, thereby improving the protective effect of the cover body 100 on the circuit board.

[0106] In a possible embodiment, illustratively, Figure 7 for Figure 1 Section view of the AA surface in the middle. Figure 1 and Figure 7 As shown, the electrical switch may include a circuit board and the circuit board protection cover in the above embodiment, wherein the circuit board is located in the circuit board protection cover.

[0107] In the embodiment of the present application, through the electrical switch provided by this embodiment, the circuit board protective cover can not only be used to accommodate the circuit board, but also protect the circuit board, reducing the possibility of damage to the circuit board when exposed to the outside.

[0108] In a possible embodiment, the electrical switch also includes a shell, the circuit board protective cover is located inside the shell, one of the shell and the cover body 100 of the circuit board protective cover is provided with a slide groove (not shown), and the other of the shell and the cover body 100 is provided with a slide rail 120, and the slide rail 120 cooperates with the slide groove.

[0109] In some possible cases, a slide rail 120 is provided on the shell, and a side of the cover body 100 close to the shell can be provided as a slide groove.

[0110] The slide rail 120 and the housing may be integrally connected or detachably connected.

[0111] The slide groove can be configured as a waist-shaped groove or a cylindrical groove.

[0112] The slide groove may be one or more long grooves along the inner wall of the housing, and the slide rail 120 is a protrusion fixed on the cover body 100 and having a shape matching the slide groove. When installing the circuit board protective cover, align the slide rail 120 with the slide groove, and push or slide the cover body 100 to move the slide rail 120 along the slide groove until the cover body 100 is installed in place.

[0113] In some other possible cases, a slide groove is provided on the shell, and a slide rail 120 is provided on a side of the cover body 100 close to the shell.

[0114] The connection mode of the slide rail 120 and the cover body 100 is similar to the connection mode of the slide rail 120 and the shell, which will not be described in detail here. In addition, the opening position of the slide groove on the shell is similar to the opening position of the slide groove on the cover body 100, which will not be described in detail here.

[0115] In this embodiment, by providing matching slide rails 120 and slide grooves between the shell and the cover body 100 of the circuit board protective cover, the assembly process of the circuit board protective cover is simplified, so that the cover body 100 can be accurately positioned and installed in the shell, which can improve the installation stability of the cover body 100 in the shell, thereby improving the installation stability of the circuit board and reducing damage to the circuit board due to shaking in the cover body 100.

[0116] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A circuit board protective cover, applied to an electrical switch, the electrical switch comprising a first voltage region, a second voltage region and a circuit board, the circuit board is located in the first voltage region, and there is a transition between the first voltage region and the second voltage region, characterized in that: The circuit board protective cover comprises a cover body, an outer cover and a blocking structure; The cover body comprises a containing cavity, and the containing cavity is used to contain the circuit board; The outer cover is located at the cavity opening of the accommodating cavity, and the outer cover is used to cover the cavity opening; The blocking structure is disposed on the outer cover and the housing, and the blocking structure is disposed close to the transition portion, and the blocking structure is used to electrically isolate the first voltage region from the second voltage region.

2. The circuit board protective cover according to claim 1, characterized in that: The blocking structure is configured as a connecting plate, one side of the connecting plate is integrally connected to a side of the cover body close to the transition portion, and the other side of the connecting plate is integrally connected to a side of the outer cover close to the transition portion.

3. The circuit board protective cover according to claim 1, characterized in that: The blocking structure includes a rotating column and a rotating cavity; The rotating column is connected to a side of the outer cover close to the transition part, the rotating cavity is arranged at a position of the cover body corresponding to the rotating column, and the rotating column is inserted into the rotating cavity; or, The rotating column is connected to one side of the cover body close to the transition part, the rotating cavity is arranged at a position corresponding to the outer cover and the rotating column, and the rotating column is inserted into the rotating cavity.

4. The circuit board protective cover according to claim 1, characterized in that: The blocking structure includes a plug-in plate and a plug-in slot; The plug board is connected to one side of the outer cover close to the transition part, the plug slot is arranged at a position corresponding to the cover body and the plug board, and the plug board is inserted into the plug slot; or, The plug-in board is connected to one side of the cover body close to the transition part, the plug-in slot is arranged at a position corresponding to the outer cover and the plug-in board, and the plug-in board is inserted into the plug-in slot.

5. The circuit board protective cover according to claim 4, characterized in that: When the plug board is connected to the outer cover, the plug board is integrally formed on one side of the outer cover close to the transition point; When the plug board is connected to the cover body, the plug board is integrally formed on one side of the cover body close to the transition point.

6. The circuit board protective cover according to any one of claims 3 to 5, characterized in that: The blocking structure also includes a sealing gasket; The sealing gasket is arranged between the outer cover and the housing, and one side of the sealing gasket contacts with a side of the outer cover facing the housing, and the other side of the sealing gasket contacts with a side of the housing facing the outer cover.

7. The circuit board protective cover according to claim 6, characterized in that: The blocking structure further comprises a sealing groove, wherein the sealing groove is arranged on a side of the outer cover facing the cover body; and / or, The sealing groove is arranged on a side of the cover body facing the outer cover; The sealing gasket is at least partially located in the sealing groove.

8. The circuit board protective cover according to any one of claims 1 to 5, characterized in that: The circuit board protective cover also includes a hook and a buckle that cooperate with each other; The hook is arranged on a side of the outer cover away from the transition portion, and the buckle is arranged on a side of the cover body away from the transition portion; and / or, The hook is arranged on a side of the cover body away from the transition portion, and the buckle is arranged on a side of the outer cover away from the transition portion.

9. An electrical switch, characterized in that: It comprises a circuit board and a circuit board protective cover as claimed in any one of claims 1 to 8, wherein the circuit board is located in the circuit board protective cover.

10. The electrical switch according to claim 9, characterized in that The electrical switch further comprises a housing, wherein the circuit board protection cover is located within the housing; One of the shell and the cover body of the circuit board protective cover is provided with a slide groove, and the other of the shell and the cover body is provided with a slide rail, and the slide rail matches the slide groove.

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