Circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a circuit breaker, which comprises a shell, a mutual inductor, a circuit board, a first release and a second release, a first plane where the circuit board is located is perpendicular to the length direction of the circuit breaker, the first plane penetrates through the mutual inductor, and the axis of the mutual inductor is perpendicular to the first plane; the first tripper and the second tripper are arranged side by side in the width direction of the circuit breaker and located on the same side of the first plane. The circuit breaker has a smaller volume, and is beneficial to the reduction of the preparation cost and the assembly and use of a user.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker. Background Art

[0002] Circuit breakers are essential switching devices in power distribution circuits, and they play a protective and control role in power systems. When an overload, short circuit or leakage occurs in the circuit where the circuit breaker is located, the circuit breaker can detect and automatically disconnect.

[0003] In the related art, the mutual inductor, circuit board and release in the circuit breaker are arranged coplanarly in the width direction of the circuit breaker, so that the circuit breaker needs sufficient space to meet the design requirements, resulting in a larger overall volume of the circuit breaker, which not only has a high manufacturing cost but also is inconvenient for users to assemble and use. Utility Model Content

[0004] In view of this, the utility model provides a circuit breaker with a smaller volume, which is beneficial to the reduction of manufacturing cost and the assembly and use by users.

[0005] The utility model provides a circuit breaker, which comprises a housing and a mutual inductor, a circuit board, a first release and a second release located in the housing;

[0006] The first plane where the circuit board is located is perpendicular to the length direction of the circuit breaker, the first plane passes through the mutual inductor, and the axis of the mutual inductor is perpendicular to the first plane;

[0007] The first release and the second release are arranged side by side in the width direction of the circuit breaker and are located on the same side of the first plane.

[0008] In a possible implementation, the orthographic projection of the first release on the first side wall of the housing falls within the orthographic projection of the circuit board on the first side wall of the housing;

[0009] The orthographic projection of the second release on the first side wall of the housing does not overlap with the orthographic projection of the mutual inductor on the first side wall of the housing, wherein the first side wall is a side wall of the housing parallel to the first plane.

[0010] In a possible implementation manner, a distance between the circuit board and a first end of the first release facing the circuit board ranges from 2 mm to 4 mm.

[0011] In a possible implementation, the housing has a cavity structure for accommodating the circuit board and the mutual inductor;

[0012] A side of the circuit board close to the mutual inductor forms an avoidance edge;

[0013] The mutual inductor is located between the avoidance edge and the second side wall of the housing.

[0014] In a possible implementation manner, a middle portion of the avoidance edge is recessed in a direction away from the mutual inductor.

[0015] In a possible implementation manner, the avoidance edge is an arc segment or includes multiple straight line segments.

[0016] In a possible implementation manner, a mounting structure is provided on a wall of the cavity structure for mounting the circuit board in the cavity structure.

[0017] In a possible implementation manner, the mounting structure includes a plurality of fixing members, wherein at least one fixing member is disposed on a third side wall of the shell body opposite to the second side wall.

[0018] In a possible implementation manner, the fixing member includes a first bump and a second bump that are arranged side by side and at an interval, and at least one side of the circuit board is clamped between the first bump and the second bump.

[0019] In a possible implementation manner, the distance between the first release and the circuit board is within a preset distance range.

[0020] In a possible implementation manner, the first release is a release including leakage protection and magnetic protection functions, and the second release is a release including magnetic protection function.

[0021] The beneficial effects of the technical solution provided by the embodiment of the utility model include at least:

[0022] The circuit breaker provided in the embodiment of the utility model changes the spatial arrangement of the mutual inductor, the circuit board and the release in the circuit breaker in the related art by arranging the mutual inductor and the circuit board in the same plane, and arranging the first release and the second release side by side on the same side of the circuit board in a direction perpendicular to the first plane where the circuit board is located. Under the premise of not affecting the performance of the circuit breaker, the occupied space is saved, so that the circuit breaker has a smaller volume, which is conducive to reducing the preparation cost and assembling and using by users.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A cross-sectional view of an exemplary circuit breaker provided for an embodiment of the utility model;

[0026] Figure 2 The overall structure of an exemplary circuit breaker provided by an embodiment of the utility model and its side view after being cut off at AA;

[0027] Figure 3 A partial cross-sectional view of an exemplary circuit breaker provided by an embodiment of the utility model;

[0028] Figure 4 A cross-sectional view of an exemplary circuit breaker provided by an embodiment of the utility model at a transformer and a circuit board along an XZ plane;

[0029] Figure 5 A cross-sectional view of an exemplary circuit breaker provided in accordance with an embodiment of the present invention.

[0030] The reference numerals in the figures represent respectively:

[0031] 1. Shell; 11. First side wall; 12. Cavity structure; 13. Second side wall; 14. Mounting structure; 141. Fixing member; 1411. First protrusion; 1412. Second protrusion; 15. Third side wall;

[0032] 2. Transformer;

[0033] 3. Circuit board; 31-avoid edge; 311-straight line segment;

[0034] 4. The first release;

[0035] 5. Second release;

[0036] 6. Thermal components;

[0037] 7. Execution structure;

[0038] 8. Moving contact;

[0039] 9. Stationary contact;

[0040] X, width direction of the circuit breaker;

[0041] Y, length direction of the circuit breaker;

[0042] Z, height direction of the circuit breaker.

[0043] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the present invention, it should be understood that some directional terms are based on the directions or positional relationships shown in the drawings, and are only used to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In the embodiments of the present invention, such as "upper", "lower", "side", etc., generally, the terms "upper", "lower", "side", etc. are used as the reference numerals. Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.

[0046] In order to make the technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] At present, the circuit breakers with two protection poles (2P) commonly used in households are usually set up with the mutual inductor, circuit board and release coplanarly in the width direction of the circuit breaker, so that the width of the circuit breaker is usually 72mm. As users have higher and higher requirements for the size of the space occupied by the circuit breaker, when the circuit breaker is wider, it is difficult to find a suitable position in the distribution box for assembly, which is not convenient for users to assemble and use. At the same time, for manufacturing companies, the preparation cost of larger-sized circuit breakers is also relatively high.

[0048] In view of the problems existing in the circuit breakers in the related art, an embodiment of the utility model provides a circuit breaker, which can have a smaller volume through a more compact layout, which is beneficial to reducing the manufacturing cost and facilitating the assembly and use by users.

[0049] Figure 1A cross-sectional view of an exemplary circuit breaker provided by an embodiment of the utility model, wherein the cross-sectional view is a schematic layout diagram of the interior of the first pole along the width direction X of the circuit breaker. Figure 1 The circuit breaker is provided with a thermal assembly 6, an actuator 7, a moving contact 8, a stationary contact 9, a first release 4 and a circuit board 3 along its length direction Y from the incoming line end to the outgoing line end. In the embodiment of the utility model, the connection relationship and function of the thermal assembly 6, the actuator 7, the moving contact 8, and the stationary contact 9 are those of the circuit breaker known in the art, and their description will be omitted in this article, and the positional relationship between the mutual inductor 2, the circuit board 3, the first release 4 and the second release 5 will be mainly described in detail.

[0050] Figure 2 The overall structure of an exemplary circuit breaker provided by an embodiment of the utility model and its side view after being cut at AA, wherein X in the figure represents the width direction of the circuit breaker, Y represents the length direction of the circuit breaker, and Z represents the height direction of the circuit breaker; Figure 3 A partial cross-sectional view of an exemplary circuit breaker provided by an embodiment of the utility model. Figure 2 and Figure 3 The utility model provides a circuit breaker, comprising a housing 1 and a mutual inductor 2, a circuit board 3, a first release 4 and a second release 5 located in the housing 1.

[0051] The first plane where the circuit board 3 is located is perpendicular to the length direction Y of the circuit breaker, the first plane passes through the transformer 2, and the axis of the transformer 2 is perpendicular to the first plane. In other words, the transformer 2 and the circuit board 3 are arranged in the same plane. The first release 4 and the second release 5 are arranged side by side in the width direction X of the circuit breaker and are located on the same side of the first plane. In this way, the first release 4 and the second release 5 are arranged along the width direction X of the circuit breaker with the transformer 2 or the circuit board 3, and are no longer arranged in the same plane with the transformer 2 and the circuit board 3 along the width direction of the circuit breaker, so that the layout length of the circuit breaker in its width direction can be shortened.

[0052] In an embodiment of the utility model, the width of the circuit breaker can be 36 mm, which is equivalent to half the width of the circuit breaker with two protective poles in the related art, realizing a narrow body design of the circuit breaker, which can not only greatly increase the space utilization of the distribution box, but also reduce the cost of the material for preparing the shell 1.

[0053] Therefore, the circuit breaker provided in the embodiment of the utility model realizes a refined layout by changing the spatial arrangement of the mutual inductor, the circuit board and the release in the circuit breaker in the related art. Under the premise of not affecting the performance of the circuit breaker, the occupied space is saved, so that the circuit breaker has a smaller volume, which is beneficial to the reduction of manufacturing cost and the assembly and use by users.

[0054] In some embodiments, see Figure 3 and Figure 4 ,in Figure 4 A cross-sectional view of an exemplary circuit breaker provided in an embodiment of the utility model at the transformer and the circuit board along the XZ plane, the orthographic projection of the first release 4 on the first side wall 11 of the housing 1 falls within the orthographic projection of the circuit board 3 on the first side wall 11 of the housing 1; the orthographic projection of the second release 5 on the first side wall 11 of the housing 1 does not overlap with the orthographic projection of the transformer 2 on the first side wall 11 of the housing 1, wherein the first side wall 22 is a side wall of the housing 1 parallel to the first plane. That is to say, the first release 4 is located on one side of the circuit board 3 along the length direction Y of the circuit breaker, and the second release 5 is located on one side of the transformer 2 along the length direction Y of the circuit breaker. In this way, the space occupied by the circuit breaker in its width direction X can be made as small as possible.

[0055] In some embodiments, see Figure 3 , the distance between the circuit board and the end of the first release 4 facing the circuit board 3 is in the range of 2 mm to 4 mm, so that a certain distance is maintained between the end of the first release 4 facing the circuit board 3 and the circuit board 3. It can be understood that the distance between the end of the first release 4 facing the circuit board 3 and the circuit board 3 needs to be within a certain distance range. If the distance is too close, it may be impossible to avoid the components on the circuit board during assembly, affecting the assembly; if the distance is too far, the length of the leakage coil of the first release 4 will be compressed, so that the tripping force is reduced, affecting the leakage tripping.

[0056] In actual use, the specific distance between the circuit board and the end of the first release 4 facing the circuit board 3 needs to be selectively set according to the size of the circuit breaker to meet assembly requirements and ensure that the first release 4 can be used normally.

[0057] In some embodiments, see Figure 3 The shell 1 has a cavity structure 12 for accommodating a circuit board 3 and a mutual inductor 2, wherein a side of the circuit board 3 close to the mutual inductor 2 forms an avoidance edge 31, and the mutual inductor 2 is located between the avoidance edge 31 and the second side wall 13 of the shell 1, so that the mutual inductor 2 is limited by the circuit board 3 and the shell 1 to prevent the mutual inductor from moving after assembly and affecting the use of the circuit breaker.

[0058] In some embodiments, see Figure 3 The middle part of the avoidance edge 31 is recessed in a direction away from the mutual inductor 2 , so that part of the mutual inductor 2 is located in the recess formed by the avoidance edge 31 , which facilitates the positioning of the mutual inductor 2 .

[0059] In some embodiments, the avoidance edge 31 is an arc segment or includes a plurality of straight line segments 311 to facilitate cooperation with the mutual inductor 2 .

[0060] In the embodiment of the present utility model, see Figure 3 The avoidance edge 31 includes a plurality of straight segments 311, and the outer wall of the mutual inductor 2 can abut against at least one straight segment 311. For example, Figure 3 The outer wall of the middle transformer 2 abuts against the lower straight section 311 .

[0061] In some embodiments, see Figure 4 A mounting structure 14 is provided on the wall of the cavity structure 11 for mounting the circuit board 3 in the cavity structure 11 .

[0062] In some embodiments, see Figure 5 ,in Figure 5 A cross-sectional view of an exemplary circuit breaker provided in an embodiment of the utility model, the mounting structure 14 includes a plurality of fixing members 141, wherein at least one fixing member 141 is disposed on a third side wall 15 of the housing 1 opposite to the second side wall 13, so as to facilitate fixing of the circuit board 3.

[0063] For example, see Figure 4 The number of the fixing members 141 can be four, two of which are completely arranged on the third side wall 15, one of the other two is arranged on a side wall adjacent to the third side wall 15, and the other is arranged on another side wall adjacent to the third side wall 15. In this way, the three sides of the circuit board 3 can be fixed, ensuring that the circuit board 3 is firmly fixed on the housing 1.

[0064] In some embodiments, see Figure 5 For each fixing member 141, the fixing member 141 includes a first protrusion 1411 and a second protrusion 1412 arranged side by side and at intervals, and at least one side of the circuit board 3 is clamped between the first protrusion 1411 and the second protrusion 1412, so as to utilize the cooperation of the first protrusion 1411 and the second protrusion 1412 to fix the circuit board 3.

[0065] It is understandable that the distance between the first bump 1411 and the second bump 1412 is the same as the thickness of the circuit board 3 , so that the circuit board 3 can be clamped between the first bump 1411 and the second bump 1412 .

[0066] In some embodiments, the first release 4 is a release including leakage and magnetic protection functions, that is, the first release 4 is an integrated release, and the second release 5 is a release including magnetic protection function. That is to say, in the embodiment of the utility model, the first release 4 and the second release 5 are releases with different functions to match the corresponding two different protection poles.

[0067] It should be noted that the "several" and "at least one" mentioned in the present invention refer to one or more, and "multiple" and "at least two" refer to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0068] In the description of the present invention, 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, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0070] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0071] In the description of this specification, the description with reference to the terms "some embodiments", "one embodiment", "some implementations", "illustrative implementations", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are included in at least one embodiment or example of the present invention.

[0072] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that: The circuit breaker comprises a housing (1), and a mutual inductor (2), a circuit board (3), a first release (4), and a second release (5) located in the housing (1); The first plane where the circuit board (3) is located is perpendicular to the length direction (Y) of the circuit breaker, the first plane passes through the mutual inductor (2), and the axis of the mutual inductor (2) is perpendicular to the first plane; The first release (4) and the second release (5) are arranged side by side in the width direction (X) of the circuit breaker and are located on the same side of the first plane.

2. The circuit breaker according to claim 1, characterized in that: The orthographic projection of the first release (4) on the first side wall (11) of the housing (1) falls within the orthographic projection of the circuit board (3) on the first side wall (11) of the housing (1); The orthographic projection of the second release (5) on the first side wall (11) of the housing (1) does not overlap with the orthographic projection of the mutual inductor (2) on the first side wall (11) of the housing (1), wherein the first side wall (11) is a side wall of the housing (1) parallel to the first plane.

3. The circuit breaker according to claim 2, characterized in that: The distance between the circuit board (3) and an end of the first release (4) facing the circuit board (3) ranges from 2 mm to 4 mm.

4. The circuit breaker according to claim 1, characterized in that: The housing (1) has a cavity structure (12) for accommodating the circuit board (3) and the mutual inductor (2); A side of the circuit board (3) close to the mutual inductor (2) forms an avoidance edge (31); The mutual inductor (2) is located between the avoidance edge (31) and the second side wall (13) of the housing (1).

5. The circuit breaker according to claim 4, characterized in that: The middle portion of the avoidance edge (31) is recessed in a direction away from the mutual inductor (2).

6. The circuit breaker according to claim 4, characterized in that: The avoidance edge (31) is an arc segment or includes a plurality of straight line segments (311).

7. The circuit breaker according to claim 4, characterized in that: A mounting structure (14) is provided on the wall of the cavity structure (12) for mounting the circuit board (3) in the cavity structure (12).

8. The circuit breaker according to claim 7, characterized in that: The mounting structure (14) comprises a plurality of fixing members (141), wherein at least one fixing member (141) is arranged on a third side wall (15) of the housing (1) opposite to the second side wall (13).

9. The circuit breaker according to claim 8, characterized in that The fixing member (141) comprises a first protrusion (1411) and a second protrusion (1412) which are arranged side by side and at intervals, and at least one side of the circuit board (3) is clamped between the first protrusion (1411) and the second protrusion (1412).

10. The circuit breaker according to claim 1, characterized in that The first release (4) is a release having leakage and magnetic protection functions, and the second release (5) is a release having a magnetic protection function.

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