circuit breaker

Abstract

The utility model relates to low voltage electrical apparatus technical field, specifically disclose a circuit breaker. The utility model provides a circuit breaker, and the wiring board is worn in the space surrounded by the first baffle, base and first isolation groove, and the wiring board is wrapped to realize the cut-off of wiring board and electromagnetic assembly, sets up first board muscle and second board muscle, and second board muscle is butt jointed with the first baffle, and the wiring board and electromagnetic assembly are cut off again by the setting of first board muscle and second board muscle, and the creepage path between electromagnetic assembly and wiring board is by electromagnetic assembly between first baffle and second board muscle, along first baffle to wiring board, increase the creepage distance between wiring board and electromagnetic assembly, reduce the probability of pressure breakdown caused by the creepage distance between wiring board and electromagnetic assembly being too short in the impact withstand voltage test, and reduce the probability of flashover of circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a circuit breaker. Background Technology

[0002] With the development of the low-voltage electrical appliance industry, miniature circuit breakers, as an important component of low-voltage electrical appliances, possess protection functions with time-delay and instantaneous operating characteristics, and also function as assembly accessories. However, in practical applications, the dielectric performance of circuit breakers has become an important indicator in their use, with the impulse withstand voltage test being a technical means to measure whether the dielectric performance of a circuit breaker is qualified. Taking a 1P+N circuit breaker as an example, its internal components contain a large number of metal elements. The N and L poles, as two separate units, each perform their respective functions. When a large instantaneous overvoltage passes through the product, the plastic parts on the surface of the metal elements inside the N and L poles become polarized, resulting in charged areas on the surface of the plastic parts. In existing technology, for miniature circuit breakers, the sum of the radii of the charged areas is usually greater than the shortest path length (creepage distance) between the two conductive parts, and flashover or breakdown may occur on the surface of the insulation material. Utility Model Content

[0003] The purpose of this invention is to provide a circuit breaker that increases the creepage distance between the electromagnetic components and the terminal block, thereby reducing the probability of flashover or breakdown.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Circuit breakers, including:

[0006] L-polar conductive system, including electromagnetic components;

[0007] N-pole conductive system, including terminal block;

[0008] The housing includes a base, a cover, and a partition assembly. The base is disposed on one side of the partition assembly, and the cover is disposed on the other side of the partition assembly. The cover and the base are connected to form a receiving cavity. The electromagnetic component is disposed in the receiving cavity and positioned above the partition assembly.

[0009] The partition assembly has a first isolation groove on the side facing the base, and a first baffle is provided on the inner side of the base. The first baffle and the first isolation groove are stacked on the outer side wall facing the electromagnetic assembly. The terminal block passes through the space enclosed by the first baffle, the base and the first isolation groove.

[0010] The partition assembly has a first rib on the side facing the cover, and a second rib on the inner side of the cover. The second rib is located on the side of the first rib facing the electromagnetic assembly, and extends toward the first baffle and connects with the first baffle.

[0011] As an optional technical solution for the aforementioned circuit breaker, the second reinforcing bar includes a second reinforcing bar body and an extension reinforcing bar. One end of the second reinforcing bar body is connected to the housing cover. The second reinforcing bar body is disposed on the side of the first reinforcing bar facing the electromagnetic component, and the other end of the second reinforcing bar body abuts against the partition assembly. One end of the extension reinforcing bar is connected to the other end of the second reinforcing bar body. The extension reinforcing bar is disposed between the partition assembly and the electromagnetic component, and the other end of the extension reinforcing bar is connected to the first baffle.

[0012] As an optional technical solution for the aforementioned circuit breaker, the second rib body is provided with one of a plug-in groove and a plug-in block on the side facing the first rib, and the first rib is provided with the other of a plug-in groove and a plug-in block on the side facing the electromagnetic component, with the plug-in block being inserted into the plug-in groove.

[0013] As an optional technical solution for the circuit breaker mentioned above, a third rib is provided at a distance from the side of the second rib body away from the electromagnetic component. One end of the third rib is connected to the shell cover, and the other end of the third rib abuts against the end of the first rib away from the partition assembly.

[0014] As an optional technical solution for the circuit breaker mentioned above, the first baffle is provided with a first straight surface and a first inclined surface connected in sequence at one end facing the second rib. The first inclined surface is inclined towards one side of the base, and the first straight surface is located close to the electromagnetic component.

[0015] The second plate rib has a second inclined surface and a second straight surface connected in sequence at one end facing the first baffle. The second inclined surface is inclined in the same direction as the first inclined surface and is located close to the electromagnetic component.

[0016] As an optional technical solution for the aforementioned circuit breaker, a second baffle is provided on the inner side of the base. The second baffle is spaced apart from the first baffle and inserted into the first isolation groove. The second baffle, the base, and the first isolation groove form a space for the terminal block to pass through.

[0017] As an optional technical solution for the circuit breaker described above, the first baffle has a first contact surface, a second contact surface, a third inclined surface, and a third contact surface connected in sequence on the side of the first isolation groove facing the outer wall. The first contact surface is in contact with the outer wall of the first isolation groove, the second contact surface is in contact with the end face of the first isolation groove, the third inclined surface is inclined towards the side of the base, and the third contact surface is in contact with the surface of the terminal block.

[0018] As an optional technical solution for the aforementioned circuit breaker, the partition assembly includes a first partition and a second partition, the first partition and the second partition extending in opposite directions and overlapping each other, the electromagnetic component being disposed above the first partition and the second partition, the first partition and the second partition each having a first rib on the side facing the housing cover, the first partition having a first groove on the side facing the base, the second partition having a second groove on the side facing the base, and the first groove and the second groove being joined together to form the first isolation groove.

[0019] As an optional technical solution for the aforementioned circuit breaker, the first partition includes a first partition portion and a first overlapping portion, with one end of the first overlapping portion connected to the first partition portion.

[0020] The second partition includes a second dividing portion and a second overlapping portion, with one end of the second overlapping portion connected to the second dividing portion;

[0021] One of the other ends of the second overlapping portion and the other end of the first overlapping portion is provided with a stepped surface, and the other is provided with an overlapping plate, which overlaps the stepped surface.

[0022] As an optional technical solution for the aforementioned circuit breaker, the base, the housing cover, and the partition assembly are all made of plastic.

[0023] Beneficial effects:

[0024] The circuit breaker provided by this utility model has a terminal block that passes through the space enclosed by a first baffle, a base, and a first isolation groove, thus isolating the terminal block from the electromagnetic component. A first rib and a second rib are provided, with the second rib abutting against the first baffle. The first and second ribs further isolate the terminal block from the electromagnetic component. The creepage path between the electromagnetic component and the terminal block passes through the space between the first baffle and the second rib, along the first baffle to the terminal block. This increases the creepage distance between the terminal block and the electromagnetic component, reducing the probability of withstand voltage breakdown caused by excessively short creepage distance between the terminal block and the electromagnetic component during the impulse withstand voltage test, and also reducing the probability of flashover in the circuit breaker. Attached Figure Description

[0025] Figure 1 This is a partial sectional view of the circuit breaker provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker provided in this embodiment of the utility model;

[0027] Figure 3 This is a cross-sectional view of the circuit breaker provided in this embodiment of the utility model;

[0028] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point A;

[0029] Figure 5 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the shell cover provided in an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the first partition provided in this embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the second partition provided in an embodiment of the present utility model.

[0033] In the picture:

[0034] 1. Low-pole conductive system; 2. North-pole conductive system; 3. Housing;

[0035] 11. Electromagnetic components;

[0036] 21. Terminal block;

[0037] 31. Base; 311. First baffle; 3111. First straight surface; 3112. First inclined surface; 3113. First contact surface; 3114. Second contact surface; 3115. Third inclined surface; 3116. Third contact surface; 312. Second baffle; 32. Shell cover; 321. Second rib; 3211. Second rib body; 3212. Extended rib; 3213. Second inclined surface; 3214. Second straight surface; 322. Insertion groove; 323. Third rib; 33. Partition assembly; 331. First isolation groove; 332. First rib; 333. Insertion block; 334. First partition; 3341. First partition portion; 3342. First overlap portion; 3343. Step surface; 335. Second partition; 3351. Second partition portion; 3352. Second overlap portion; 3353. Overlap plate. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] like Figures 1 to 6As shown, this embodiment provides a circuit breaker, which includes an L-pole conductive system 1, an N-pole conductive system 2, and a housing 3. The L-pole conductive system 1 includes an electromagnetic component 11, and the N-pole conductive system 2 includes a terminal block 21. The housing 3 includes a base 31, a cover 32, and a partition assembly 33. The base 31 is disposed on one side of the partition assembly 33, and the cover 32 is disposed on the other side of the partition assembly 33. The cover 32 and the base 31 are connected to form a receiving cavity. The electromagnetic component 11 is disposed in the receiving cavity and positioned above the partition assembly 33. The partition assembly 33 has a first isolation groove 331 on the side facing the base 31, and a first baffle 311 is provided on the inner side of the base 31. The first baffle 311 and the first isolation groove 331 are stacked on the outer wall facing the electromagnetic component 11. The terminal block 21 passes through the space enclosed by the first baffle 311, the base 31, and the first isolation groove 331. The partition assembly 33 has a first rib 332 on the side facing the cover 32, and a second rib 321 is provided on the inner side of the cover 32. The second rib 321 is located on the side of the first rib 332 facing the electromagnetic assembly 11, and extends toward the first baffle 311 and connects with the first baffle 311.

[0043] The terminal block 21 passes through the space enclosed by the first baffle 311, the base 31, and the first isolation groove 331, thus isolating the terminal block 21 from the electromagnetic component 11. A first rib 332 and a second rib 321 are provided, with the second rib 321 abutting against the first baffle 311. The first rib 332 and the second rib 321 further isolate the terminal block 21 from the electromagnetic component 11. The creepage path between the electromagnetic component 11 and the terminal block 21 runs from the electromagnetic component 11 through the space between the first baffle 311 and the second rib 321, along the first baffle 311 to the terminal block 21. Figure 4 The dashed line in the middle represents the creepage path. This increases the creepage distance between the terminal block 21 and the electromagnetic component 11, reduces the probability of withstand voltage breakdown caused by the short creepage distance between the terminal block 21 and the electromagnetic component 11 during the impulse withstand voltage test, and also reduces the probability of flashover of the circuit breaker.

[0044] In some embodiments, such as Figures 2 to 5 As shown, the second rib 321 includes a second rib body 3211 and an extension rib 3212. One end of the second rib body 3211 is connected to the shell cover 32. The second rib body 3211 is disposed on the side of the first rib 332 facing the electromagnetic component 11, and the other end of the second rib body 3211 abuts against the partition assembly 33. One end of the extension rib 3212 is connected to the other end of the second rib body 3211. The extension rib 3212 is disposed between the partition assembly 33 and the electromagnetic component 11, and the other end of the extension rib 3212 is connected to the first baffle 311, effectively isolating the terminal block 21 and the electromagnetic component 11 and increasing the creepage distance between the terminal block 21 and the electromagnetic component 11.

[0045] Optionally, the second rib body 3211 is provided with one of a insertion groove 322 and an insertion block 333 on the side facing the first rib 332, and the first rib 332 is provided with the other of a insertion groove 322 and an insertion block 333 on the side facing the electromagnetic component 11. The insertion block 333 is inserted into the insertion groove 322, which enables the second rib body 3211 and the first rib 332 to fit precisely, thereby fixing the relative position of the second rib body 3211 and the first rib 332, and also serves to pre-fix the cover 32.

[0046] Optionally, a third rib 323 is provided at a distance from the side of the second rib body 3211 away from the electromagnetic component 11. One end of the third rib 323 is connected to the cover 32, and the other end of the third rib 323 abuts against the end of the first rib 332 away from the partition assembly 33. The third rib 323 improves the structural strength of the cover 32. The third rib 323 and the second rib 321 work together to stabilize the first rib 332, preventing deformation of the first rib 332. At the same time, it also serves to isolate the electromagnetic component 11 and the terminal block 21.

[0047] In some embodiments, such as Figure 3 and Figure 4 As shown, the first baffle 311 has a first straight surface 3111 and a first inclined surface 3112 connected in sequence at one end facing the second rib 321. The first inclined surface 3112 is inclined towards one side of the base 31, and the first straight surface 3111 is located close to the electromagnetic component 11. The second rib 321 has a second inclined surface 3213 and a second straight surface 3214 connected in sequence at one end facing the first baffle 311. The second inclined surface 3213 is inclined in the same direction as the first inclined surface 3112 and is located close to the electromagnetic component 11. This mating structure increases the creepage distance between the electromagnetic component 11 and the terminal block 21.

[0048] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, a second baffle 312 is provided on the inner side of the base 31. The second baffle 312 is spaced apart from the first baffle 311. The second baffle 312 is inserted into the first isolation groove 331. The second baffle 312, the base 31 and the first isolation groove 331 form a space for the terminal block 21 to pass through, so as to completely wrap the terminal block 21. On the side facing the electromagnetic component 11, the side wall of the first baffle 311 and the first isolation groove 331 are stacked to increase the thickness of the isolation insulation, which further improves the creepage distance between the electromagnetic component 11 and the terminal block 21.

[0049] In some embodiments, the first baffle 311 has a first contact surface 3113, a second contact surface 3114, a third inclined surface 3115, and a third contact surface 3116 connected in sequence on the side of the outer wall of the first isolation groove 331. The first contact surface 3113 is in contact with the outer wall of the first isolation groove 331, the second contact surface 3114 is in contact with the end face of the first isolation groove 331, the third inclined surface 3115 is inclined towards the side of the base 31, and the third contact surface 3116 is in contact with the surface of the terminal block 21. This achieves a tight fit between the first baffle 311 and the outer wall of the first isolation groove 331, and fixes the terminal block 21 within the space enclosed by the first baffle 311, the base 31, and the first isolation groove 331.

[0050] Combination Figure 2 , Figure 7 and Figure 8 As shown, in some embodiments, the partition assembly 33 includes a first partition 334 and a second partition 335. The first partition 334 and the second partition 335 extend in opposite directions and overlap. The electromagnetic component 11 is disposed above the first partition 334 and the second partition 335. Both the first partition 334 and the second partition 335 have first ribs 332 on the side facing the cover 32. The first partition 334 has a first groove on the side facing the base 31, and the second partition 335 has a second groove on the side facing the base 31. The first groove and the second groove are joined to form a first isolation groove 331. The first partition 334 and the second partition 335 are configured as a split structure, and the overlap of the first partition 334 and the second partition 335 increases the creepage distance between the L-polar conductive system 1 and the N-polar conductive system 2, preventing the circuit breaker from being broken down and improving the dielectric properties of the L-polar conductive system 1 and the N-polar conductive system 2.

[0051] Optionally, the first partition 334 includes a first dividing portion 3341 and a first overlapping portion 3342, with one end of the first overlapping portion 3342 connected to the first dividing portion 3341. The second partition 335 includes a second dividing portion 3351 and a second overlapping portion 3352, with one end of the second overlapping portion 3352 connected to the second dividing portion 3351. One of the other ends of the second overlapping portion 3352 and the other end of the first overlapping portion 3342 is provided with a stepped surface 3343, and the other is provided with an overlapping plate 3353. The overlapping plate 3353 overlaps on the stepped surface 3343. The connection structure is simple. After the first partition 334 and the second partition 335 are respectively installed in place, a seamless connection between the first overlapping portion 3342 and the second overlapping portion 3352 is achieved, increasing the creepage distance between the L-polar conductive system 1 and the N-polar conductive system 2, preventing the circuit breaker from being broken down, and improving the dielectric properties of the L-polar conductive system 1 and the N-polar conductive system 2.

[0052] The base 31, cover 32 and partition assembly 33 mentioned above are all made of plastic to insulate and isolate the L-polar conductive system 1 and the N-polar conductive system 2.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A circuit breaker, characterized in that, include: L-polar conductive system (1), including electromagnetic component (11); N-pole conductive system (2), including terminal block (21); The housing (3) includes a base (31), a cover (32) and a partition assembly (33). The base (31) is disposed on one side of the partition assembly (33), and the cover (32) is disposed on the other side of the partition assembly (33). The cover (32) and the base (31) are connected to form a receiving cavity. The electromagnetic component (11) is disposed in the receiving cavity and is positioned above the partition assembly (33). The partition assembly (33) has a first isolation groove (331) on the side facing the base (31), and a first baffle (311) is provided on the inner side of the base (31). The first baffle (311) and the first isolation groove (331) are stacked on the outer side wall facing the electromagnetic assembly (11). The wiring board (21) passes through the space enclosed by the first baffle (311), the base (31) and the first isolation groove (331). The partition assembly (33) has a first rib (332) on the side facing the shell cover (32), and a second rib (321) is provided on the inner side of the shell cover (32). The second rib (321) is located on the side of the first rib (332) facing the electromagnetic assembly (11), and the second rib (321) extends toward the first baffle (311) and connects with the first baffle (311).

2. The circuit breaker according to claim 1, characterized in that, The second rib (321) includes a second rib body (3211) and an extension rib (3212). One end of the second rib body (3211) is connected to the shell cover (32). The second rib body (3211) is disposed on the side of the first rib (332) facing the electromagnetic component (11), and the other end of the second rib body (3211) abuts against the partition assembly (33). One end of the extension rib (3212) is connected to the other end of the second rib body (3211). The extension rib (3212) is disposed between the partition assembly (33) and the electromagnetic component (11), and the other end of the extension rib (3212) is connected to the first baffle (311).

3. The circuit breaker according to claim 2, characterized in that, The second rib body (3211) is provided with one of a plug groove (322) and a plug block (333) on the side facing the first rib (332), and the first rib (332) is provided with the other of a plug groove (322) and a plug block (333) on the side facing the electromagnetic component (11), and the plug block (333) is inserted into the plug groove (322).

4. The circuit breaker according to claim 2, characterized in that, The second rib body (3211) is provided with a third rib (323) on the side away from the electromagnetic component (11). One end of the third rib (323) is connected to the shell cover (32), and the other end of the third rib (323) abuts against the end of the first rib (332) away from the partition assembly (33).

5. The circuit breaker according to claim 1, characterized in that, The first baffle (311) has a first straight surface (3111) and a first inclined surface (3112) connected in sequence at one end facing the second rib (321). The first inclined surface (3112) is inclined towards one side of the base (31), and the first straight surface (3111) is located close to the electromagnetic component (11). The second rib (321) has a second inclined surface (3213) and a second straight surface (3214) connected in sequence at one end facing the first baffle (311). The second inclined surface (3213) is inclined in the same direction as the first inclined surface (3112), and the second inclined surface (3213) is located close to the electromagnetic component (11).

6. The circuit breaker according to claim 1, characterized in that, The base (31) is provided with a second baffle (312) on its inner side. The second baffle (312) is spaced apart from the first baffle (311). The second baffle (312) is inserted into the first isolation groove (331). The second baffle (312), the base (31) and the first isolation groove (331) form a space for the wiring board (21) to pass through.

7. The circuit breaker according to claim 1, characterized in that, The first baffle (311) has a first contact surface (3113), a second contact surface (3114), a third inclined surface (3115) and a third contact surface (3116) connected in sequence on the side facing the outer wall of the first isolation groove (331). The first contact surface (3113) is in contact with the outer wall of the first isolation groove (331), the second contact surface (3114) is in contact with the end face of the first isolation groove (331), the third inclined surface (3115) is inclined towards the side of the base (31), and the third contact surface (3116) is in contact with the surface of the wiring board (21).

8. The circuit breaker according to claim 1, characterized in that, The partition assembly (33) includes a first partition (334) and a second partition (335). The first partition (334) and the second partition (335) extend in opposite directions and overlap the first partition (334) and the second partition (335). The electromagnetic component (11) is disposed above the first partition (334) and the second partition (335). The first partition (334) and the second partition (335) are provided with the first rib (332) on the side facing the shell cover (32). The first partition (334) is provided with the first groove on the side facing the base (31), and the second partition (335) is provided with the second groove on the side facing the base (31). The first groove and the second groove are spliced ​​together to form the first isolation groove (331).

9. The circuit breaker according to claim 8, characterized in that, The first partition (334) includes a first partition (3341) and a first overlapping part (3342), one end of the first overlapping part (3342) being connected to the first partition (3341); The second partition (335) includes a second partition portion (3351) and a second overlapping portion (3352), one end of the second overlapping portion (3352) being connected to the second partition portion (3351); One of the other ends of the second overlapping portion (3352) and the other end of the first overlapping portion (3342) is provided with a stepped surface (3343), and the other is provided with an overlapping plate (3353), the overlapping plate (3353) overlapping the stepped surface (3343).

10. The circuit breaker according to claim 1, characterized in that, The base (31), the cover (32), and the partition assembly (33) are all made of plastic.

Images