Electric leakage module and electric leakage circuit breaker

Abstract

The utility model discloses an electric leakage module and an electric leakage circuit breaker. The electric leakage module comprises a module housing, a release and an electric leakage circuit board. An electric leakage mechanism and a test device are arranged in the module housing; the module housing and the release are both located on the first surface of the electric leakage circuit board, and the release and the electric leakage circuit board are welded and fixed; the module housing is provided with a release cavity, the release cavity is communicated with the interior of the module housing, and the release cavity is used for accommodating a release; the tripper cavity is provided with a mounting port on the first surface, facing the electric leakage circuit board, of the module housing, and the tripper is mounted in the tripper cavity through the mounting port; the module housing is provided with a clamping hook, and the clamping hook and the electric leakage circuit board are fixed in a clamping manner or the clamping hook and the release are fixed in a clamping manner. The utility model has the characteristic of compact structure.

Description

Technical Field

[0001] The utility model relates to a leakage circuit breaker, in particular to a leakage module. Background Art

[0002] In the field of miniature circuit breakers, leakage circuit breakers are a relatively common type. A leakage circuit breaker includes a leakage module, and the leakage module has a leakage circuit board, a trip device, a tripping mechanism, and a test structure. Each component in the existing leakage modules is directly assembled in the housing of the leakage module. Since the components are relatively scattered, it is not conducive to automated assembly.

[0003] Therefore, how to make the components in the leakage module more concentrated and more conducive to automated assembly is a problem worthy of consideration. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art, and aims to provide a leakage module with the characteristics of modular installation.

[0005] The utility model provides: a leakage module, which includes a module housing, a trip device, and a leakage circuit board; a leakage mechanism and a test device are arranged inside the module housing; the module housing and the trip device are both located on the first surface of the leakage circuit board, and the trip device is fixedly welded to the leakage circuit board; the module housing has a trip device cavity, and the trip device cavity is communicated with the inside of the module housing, and the trip device cavity is used to accommodate the trip device; the trip device cavity has an installation opening on the first surface of the module housing facing the leakage circuit board, and the trip device is inserted into the trip device cavity through the installation opening; the module housing has a hook, and the hook forms a snap connection with the leakage circuit board or the hook forms a snap connection with the trip device.

[0006] In some embodiments of the present application, the trip device includes a coil bobbin and a coil; two first guiding columns extend from the coil bobbin towards the first surface, and two welding limiting holes are formed on the leakage circuit board; welding portions are provided on the first guiding columns, and the two welding portions are respectively electrically connected to the two ends of the coil or the two welding portions are the two ends of the coil, and the welding portions extend into the welding limiting holes, and the welding portions are welded to the leakage circuit board.

[0007] In some embodiments of the present application, a first positioning column extends from the coil bobbin towards the first surface, a first positioning hole is formed on the leakage circuit board, and the first positioning column and the first positioning hole form a plug-in fit.

[0008] In some embodiments of the present application, a second positioning column extends from the module housing towards the first surface, a second positioning hole is formed on the leakage circuit board, and the second positioning column and the second positioning hole form a plug-in fit.

[0009] In some embodiments of the present application, the release includes a coil bobbin and a coil. Inside the coil bobbin, there are a moving iron core, a static iron core, and a return spring. The moving iron core, the static iron core, and the return spring are axisymmetric structures, and the axis of symmetry is the center line of their first-direction dimensions. The first direction is parallel to the length direction of the coil bobbin.

[0010] In some embodiments of the present application, the release includes a yoke and a coil bobbin. The yoke includes two side plates and a connecting plate. The two side plates are connected by the connecting plate. There are bayonet openings on the two side plates, and the coil bobbin has barbs corresponding to the bayonet openings. The barbs and the bayonet openings form a snap-fit. The module housing is snapped to the side plates through hooks to achieve snap-fixing of the hooks and the release.

[0011] In some embodiments of the present application, the module housing includes a first housing and a second housing. The first housing has a first region, a second region, and a third region. The second housing completely covers the first region, and the first region is used to install a test device. The second housing completely covers or partially covers the second region, and the second region is used to install a leakage mechanism. The third region is completely exposed to form a release cavity and an installation opening.

[0012] In some embodiments of the present application, there is a first gap between the module cover and the first surface of the leakage circuit board. The substrate thickness dimension of the leakage circuit board is d, and d < the first gap < 6d.

[0013] A leakage circuit breaker includes a breaker pole and a leakage pole. The leakage pole includes a leakage housing. Among them, the above-mentioned leakage module is inside the leakage housing. A slot is formed inside the leakage housing, and the opening direction of the slot is the height direction of the leakage circuit breaker. The module housing is provided with a plug-in portion, and the plug-in portion is inserted into the slot to form a positioning structure for installing the leakage module.

[0014] In some embodiments of the present application, the leakage housing includes an upper cover and a lower seat. The upper cover and the lower seat are fixed by snap-fitting and / or screw-fixing. The slot is provided on the lower seat and is located at the side wall of the lower seat.

[0015] In some embodiments of the present application, the lower seat also has an abutting rib, and in the height direction of the leakage circuit breaker, the abutting rib abuts against the leakage circuit board.

[0016] In some embodiments of the present application, there is a partition plate inside the upper cover, and the partition plate extends into the space between the module housing and the leakage circuit board.

[0017] The beneficial effects of the present application compared with the prior art:

[0018] Since the leakage mechanism and the test device are fixed inside the module housing, the release is fixedly welded to the leakage circuit board. During assembly, the leakage circuit board with the release is fitted with the module housing, so that the release is inserted into the release cavity through the installation opening. Since the module housing is provided with hooks, the hooks are fixedly clamped with the leakage circuit board or the hooks are fixedly clamped with the release, which can ensure the stability of the overall installation. The above structure can effectively realize modular assembly, which is beneficial to automated production. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Shows a schematic diagram of a leakage circuit breaker according to an embodiment of the present invention;

[0021] Figure 2 Shows a schematic diagram of a leakage electrode according to an embodiment of the present invention;

[0022] Figure 3 Shows an exploded view of a leakage electrode according to an embodiment of the present invention;

[0023] Figure 4 Shows a schematic diagram of a leakage module and a lower seat according to an embodiment of the present invention;

[0024] Figure 5 Shows a schematic diagram of a leakage module and an upper cover according to an embodiment of the present invention;

[0025] Figure 6 Shows a schematic diagram of a leakage module according to an embodiment of the present invention;

[0026] Figure 7 Shows a schematic diagram of a leakage housing according to an embodiment of the present invention;

[0027] Figure 8 Shows a schematic diagram of a first housing according to an embodiment of the present invention;

[0028] Figure 9 Shows a schematic diagram of a release according to an embodiment of the present invention;

[0029] Figure 10 Shows an exploded view of a release according to an embodiment of the present invention. Detailed Embodiments

[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 thus should not be construed as limiting the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be the direct contact between the first and second features, or the indirect contact between the first and second features through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Embodiment

[0035] like Figures 1-10 As shown, the embodiment of the utility model is a leakage circuit breaker.

[0036] The leakage circuit breaker can realize the leakage protection function. In this embodiment, the leakage circuit breaker includes a leakage pole N and a circuit breaker pole P, commonly known as a 1P+N structure.

[0037] The circuit breaker pole P, also called the air-opening pole, mainly uses tripping to protect the line. This protection includes overload protection, short circuit protection, and leakage protection. Of course, the identification and driving of the overload protection and short circuit protection here rely on the circuit breaker pole P itself. The identification and driving of the leakage protection are achieved with the help of the leakage pole N. The circuit breaker pole P here can adopt the structure in the prior art, which will not be repeated here.

[0038] The leakage electrode N includes a leakage cover and a leakage module, a zero-sequence transformer, a terminal block, etc. arranged inside the leakage cover.

[0039] Here, the leakage cover comprises an upper cover 100 and a lower seat 200, and the upper cover 100 and the lower seat 200 are fixed by clamping. Of course, the upper cover 100 and the lower seat 200 can also be fixed by screws, or even by clamping and screws at the same time.

[0040] The leakage module comprises a leakage mechanism, a test device, a module cover 300 , a release 400 and a leakage circuit board 500 .

[0041] The test device includes a test button, a test spring, a test resistor, etc. These components constitute a test circuit. When the test button is pressed, the test circuit is turned on to simulate leakage.

[0042] The leakage mechanism includes a push rod, a reset button, a spring, an assembling pin and other components. One end of the push rod forms a locking structure with the reset button, and the other end of the push rod is located near the top rod 407 of the release 400. The assembling pin is arranged in linkage with the reset button or the push rod, and the assembling pin is associated with the lock of the operating mechanism of the circuit breaker pole P. When no leakage occurs, the reset button is not protruding from the leakage cover. When leakage occurs, the release 400 prompts the push rod to move to release the lock with the reset button, and the reset button extends out of the leakage cover. The assembling pin causes the lock of the operating mechanism to move due to the linkage relationship, so that the circuit breaker pole P is tripped and the leakage protection is completed. After tripping, the user can press the reset button to re-lock the reset button and the push rod, waiting for the next leakage protection.

[0043] The leakage circuit board 500 has a test loop circuit and a leakage protection circuit. These circuits are common knowledge to those skilled in the art and will not be elaborated here. The leakage circuit board 500 has a substrate 501, and the electronic components of these circuits are soldered on the substrate 501. The substrate 501 has a first surface 500a, and the thickness of the substrate 501 here is d.

[0044] The release 400 is fixedly soldered to the substrate 501, specifically on the first surface 500a.

[0045] The release 400 includes a yoke 401, a bobbin 403, a coil 402, a moving iron core 404, a stationary iron core 405, a return spring 406, and a push rod 407.

[0046] The yoke 401 includes two side plates 401a and a connecting plate 401b. The two side plates 401a are connected by the connecting plate 401b and are generally U-shaped. There are bayonet openings 401c on the two side plates 401a. The bobbin 403 has barbs 403a corresponding to the bayonet openings 401c, and the barbs 403a and the bayonet openings 401c form a snap-fit, so that the yoke 401 semi-envelops the outside of the bobbin 403. Such a snap-fit structure is also very conducive to automated assembly, and only needs to push the bobbin 403 into the yoke 401.

[0047] The moving iron core 404, the stationary iron core 405, the return spring 406, and the push rod 407 are all inside the bobbin 403. Here, the moving iron core 404, the stationary iron core 405, and the return spring 406 are always inside the bobbin 403, and the push rod 407 will extend out of the bobbin 403 when the moving iron core 404 is actuated. The moving iron core 404, the stationary iron core 405, and the return spring 406 are axisymmetric structures, and the axis of symmetry is the center line of their respective first-direction dimensions. The first direction is parallel to the length direction of the bobbin 403. Such an axisymmetric structure will be very convenient for automated assembly and can be directly installed without identifying the installation directions of these components.

[0048] The release 400 is specifically fixedly soldered to the substrate 501 (soldered to the leakage circuit board 500). The bobbin 403 extends two first guiding columns 403b toward the first surface 500a, and there are two soldering parts 403c on the two first guiding columns 403b. Here, the two soldering parts 403c are both welding needles, and the two welding needles are electrically connected to the two ends of the coil 402 respectively. In this way, the soldering parts 403c extend into the soldering limit holes 500b on the leakage circuit board 500, and then the soldering parts 403c are soldered to the leakage circuit board 500, so that the coil 402 can be electrically connected to the leakage circuit board 500, and the coil 402 is connected to the leakage protection circuit. Of course, the soldering parts 403c here can also be the two ends of the coil 402.

[0049] Here, the coil bobbin 403 extends a first positioning post 403d towards the first surface 500a, and the number of the first positioning posts 403d here is two. Corresponding first positioning holes 500c are formed on the leakage circuit board 500, and the first positioning posts 403d and the first positioning holes 500c form a plug-in fit to facilitate the positioning of the coil bobbin 403.

[0050] The module housing 300 has a space inside and can accommodate a test device and a leakage mechanism. The module housing 300 also has a release cavity 300c1, and the release cavity 300c1 here is communicated with the internal space because the release cavity 300c1 is used to fix the release 400, so that the release 400 can cooperate with the leakage mechanism. Here, the release cavity 300c1 has an installation opening 300c2, and the installation opening 300c2 can be used for the release 400 to be inserted. The installation opening 300c2 is actually opened towards the first surface 500a. In this way, after the release 400 is welded to the leakage circuit board 500, the installation opening 300c2 of the module housing 300 can be directly aligned with the release 400 for assembly, and such an assembly is very conducive to automated design. Here, the module housing 300 has a hook 300c3, and the hook 300c3 and the release 400 form a snap connection and fixation. Of course, the hook 300c3 here can also be changed to form a snap connection and fixation with the substrate 501.

[0051] For the module housing 300, as an implementation manner, it includes a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 can be fixed by snap fasteners, and of course, screws can also be used for fastening, or both snap fasteners and screws can be used for fixation. The first housing 301 here includes a first area 300a, a second area 300b and a third area, and the second housing 302 does not cover the third area because the third area is completely exposed to form the release cavity 300c1 and the installation opening 300c2. For the first area 300a, the second housing 302 completely covers it, and the first area 300a here is used to install the test device. For the second area 300b, the second housing 302 can either completely cover it or partially cover it, and the second area 300b here is used to install the leakage mechanism.

[0052] For the hook 300c3, it is arranged on the first housing 301, that is, located on the third area. The hook 300c3 here is snap-connected and fixed to the side plate 401a of the yoke 401 of the release 400.

[0053] The module housing 300 extends towards the first surface 500a and has three second positioning posts 300d. Second positioning holes 500d are provided on the leakage circuit board 500. The second positioning posts 300d and the second positioning holes 500d form a plug-in fit to facilitate the positioning of the module housing 300.

[0054] After the module housing 300 is installed, there is a first gap D between the module housing and the first surface 500a of the leakage circuit board 500. The thickness dimension of the substrate 501 of the leakage circuit board 500 is d, and d < the first gap D < 6d. Such a distance can ensure a certain creepage distance.

[0055] A plug-in portion 301a is provided on the module housing 300. A slot 201 is formed inside the leakage housing. The opening direction of the slot 201 is the height direction of the leakage circuit breaker. After the leakage module is assembled, the plug-in portion 301a can be inserted into the slot 201 (forming a positioning structure) so that the leakage module and the module housing 300 are assembled. Such a matching method is very beneficial for fixing the leakage module to the corresponding position. Here, the slot 201 is located at the side wall of the lower seat 200.

[0056] Here, in order to facilitate the installation of the leakage module, the lower seat 200 also has abutting ribs 202. The number of the abutting ribs 202 is two and can abut against the substrate 501 of the leakage circuit board 500, specifically in the height direction of the leakage circuit breaker. After such abutment, a gap can also be formed between the inside of the lower seat 200 and the leakage module, which is beneficial for the arrangement of other components, such as components like the zero-sequence current transformer and wires.

[0057] A partition plate 101 is also provided inside the upper cover 100. The partition plate 101 can be inserted into the first gap to achieve a certain effect of increasing the creepage distance.

[0058] Of course, in addition to the above 1P+N structure, the present application can also be applied to structures such as 2P+N, 3P+N, and 4P, and only the size of the leakage electrode N needs to be adaptively changed.

[0059] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0060] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A leakage module, characterized in that: It comprises a module cover, a release and a leakage circuit board; a leakage mechanism and a test device are arranged inside the module cover; the module cover and the release are both located on the first surface of the leakage circuit board, and the release is welded and fixed to the leakage circuit board; the module cover has a release cavity, which is communicated with the inside of the module cover and is used to accommodate the release; the release cavity has an installation opening on the first surface of the module cover facing the leakage circuit board, and the release is installed into the release cavity through the installation opening; the module cover has a hook, which is fixed to the leakage circuit board or fixed to the release.

2. A leakage current module according to claim 1, characterized in that: The release includes a coil frame and a coil; the coil frame has two first guide posts extending toward the first surface, and two welding limit holes are provided on the leakage circuit board; the first guide post has a welding portion, and the two welding portions are respectively electrically connected to the two ends of the coil or the two welding portions are the two ends of the coil, the welding portion extends into the welding limit hole, and the welding portion is welded to the leakage circuit board.

3. A leakage current module according to claim 1, characterized in that: The coil frame is provided with a first positioning column extending toward the first surface, the leakage circuit board is provided with a first positioning hole, and the first positioning column and the first positioning hole are plug-fitted; And / or, a second positioning column is extended from the module cover toward the first surface, a second positioning hole is opened on the leakage circuit board, and the second positioning column is plug-fitted with the second positioning hole.

4. The leakage current module according to claim 1, characterized in that: The release device comprises a coil frame and a coil, wherein a moving iron core, a static iron core and a reset spring are arranged inside the coil frame; The moving iron core, the stationary iron core and the return spring are of an axisymmetric structure, the axis of symmetry being the center line of their respective first direction dimensions, and the first direction is parallel to the length direction of the coil frame.

5. The leakage current module according to claim 1, characterized in that: The releaser includes a yoke and a coil frame; the yoke includes two side plates and a connecting plate, and the two side plates are connected by the connecting plate; the two side plates are provided with bayonet holes, and the coil frame has a barb corresponding to the bayonet hole, and the barb and the bayonet hole form a snap-fit ​​fit; the module cover is snapped with the side plate through the hook to achieve the snap-fit ​​fixation of the hook and the releaser.

6. The leakage current module according to claim 1, characterized in that: The module cover includes a first shell and a second shell, and the first shell has a first area, a second area and a third area; the second shell completely covers the first area, and the first area is used to install the test device; the second shell completely or partially covers the second area, and the second area is used to install the leakage mechanism; the third area is completely exposed to the outside to form a release cavity and an installation port.

7. The leakage current module according to claim 1, characterized in that: There is a first gap between the module cover and the first surface of the leakage circuit board, and the substrate thickness of the leakage circuit board is d, where d<first gap<6d.

8. A leakage circuit breaker, comprising a circuit breaker pole and a leakage electrode; the leakage electrode comprises a leakage cover; characterized in that: The leakage cover is provided with a leakage module as described in any one of claims 1 to 7; a slot is formed in the leakage cover, and the slot is opened in the height direction of the leakage circuit breaker; a plug-in part is provided on the module cover, and the plug-in part is inserted into the slot to form a positioning structure for installing the leakage module.

9. A residual current circuit breaker according to claim 8, characterized in that: The leakage cover shell comprises an upper cover and a lower seat, wherein the upper cover and the lower seat are fixed by snap connection and / or screws; a slot is arranged on the lower seat and located at the side wall of the lower seat.

10. A residual current circuit breaker according to claim 8, characterized in that: The lower seat is also provided with abutment ribs, and in the height direction of the leakage circuit breaker, the abutment ribs abut against the leakage circuit board; And / or, a partition plate is provided inside the upper cover, and the partition plate extends between the module cover and the leakage circuit board.

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