Arc extinguishing assembly and electrical switch

Abstract

The embodiment of the invention provides an arc extinguishing assembly and an electrical switch. The arc extinguishing assembly comprises a static contact and a moving contact. The magnetic part comprises a first pole and a second pole; the magnetic conducting piece comprises a connecting part and a pair of extending parts which are connected with the connecting part and are separated from each other, the connecting part is attached to the first pole, a first magnetic field can be formed between the pair of extending parts and the second pole, and a second magnetic field can be formed between the pair of extending parts; an inner chamber is arranged between the arc extinguishing member and the static contact and between the arc extinguishing member and the moving contact; at least one part of at least one of the static contact, the moving contact and the inner cavity is located between the paired extension parts, and the first magnetic field can guide an electric arc towards the direction of one extension part in the paired extension parts; and the second magnetic field can guide the electric arc guided to be adjacent to the extension part towards the direction of the arc extinguishing piece.

Description

Arc extinguishing components and electrical switches Technical Field

[0001] The embodiments of this disclosure generally relate to the field of electrical equipment technology, and more specifically, to arc extinguishing components and electrical switches. Background Technology

[0002] Due to the non-zero-crossing arc-extinguishing characteristic of DC electrical switches, the requirements for their arc-extinguishing performance have become increasingly diverse. In addition to meeting standard tests for rated current, DC electrical switches also need to meet non-standard requirements for low current.

[0003] However, under low current conditions, conventional DC electrical switches face the dilemma of near-zero air blowing or reverse air blowing and weak electromagnetic force generated by the self-excited magnetic field, resulting in problems such as long arc stagnation time, long arc burning time, and arc retreat. Summary of the Invention

[0004] The purpose of this disclosure is to provide an arc-extinguishing assembly and an electrical switch to at least partially solve the above-mentioned problems.

[0005] In a first aspect of this disclosure, an arc-extinguishing assembly is provided, comprising a stationary contact and a moving contact; a magnetic element including a first pole and a second pole; a magnetically conductive element including a connecting portion and a pair of extensions connected to and spaced apart from each other, the connecting portion being in contact with the first pole, wherein a first magnetic field is formed between the pair of extensions and the second pole, and a second magnetic field is formed between the pair of extensions; an arc-extinguishing element having an inner cavity disposed between the arc-extinguishing element and the stationary contact and the moving contact; at least a portion of at least one of the stationary contact, the moving contact, and the inner cavity is located between the pair of extensions, wherein the first magnetic field is capable of guiding an arc toward one of the extensions, and the second magnetic field is capable of guiding an arc guided to a location adjacent to the one extension toward the arc-extinguishing element.

[0006] According to embodiments of this disclosure, at least a portion of at least one of the stationary contact, the moving contact, and the inner cavity is located between the paired extensions, and the magnetic element and the magnetically conductive element can change the distribution of the magnetic field, so that the arc located at the aforementioned position can be guided towards one extension by a force in the first magnetic field, and then the guided arc can be guided towards the arc-extinguishing element by a force in the second magnetic field. In this way, the arc-extinguishing assembly of the embodiments of this disclosure can customize the structure of the paired extensions in the magnetically conductive element according to the arc-extinguishing performance of conventional electrical switches for small currents, and make the paired extensions surround the area where the arc stagnates, thereby improving the non-polar arc-extinguishing effect of the electrical switch for small currents.

[0007] In some embodiments, the arc extinguishing element includes a plurality of arc extinguishing grids, a first arc-inducing plate, and a second arc-inducing plate. The moving contact is switchable between a conducting position and a disconnected position. One end of the first arc-inducing plate is adjacent to the stationary contact. When the moving contact is in the disconnected position, one end of the second arc-inducing plate is adjacent to the moving contact. The other ends of the first and second arc-inducing plates are each adjacent to the outermost arc extinguishing grid among the plurality of arc extinguishing grids.

[0008] In some embodiments, the magnetic element is located on one side of the first arc-starting plate and the second arc-starting plate away from the other side of the first arc-starting plate and the second arc-starting plate, and the end of the paired extensions away from the connecting portion is located on one side of the first arc-starting plate and the second arc-starting plate adjacent to the other side of the first arc-starting plate and the second arc-starting plate, so that one of the first arc-starting plate and the second arc-starting plate is located in the first magnetic field.

[0009] In some embodiments, when the moving contact is in the disconnected position, at least a portion of the stationary contact, at least a portion of the moving contact, and at least a portion of the inner chamber are located between the paired extensions.

[0010] In some embodiments, each of the paired extensions includes a first portion and a second portion, the first portion of each of the paired extensions being connected to the connecting portion, the portion of the stationary contact and the portion of the inner cavity being located between the first portions of the paired extensions, and the portion of the moving contact and the portion of the inner cavity being located between the second portions of the paired extensions.

[0011] In some embodiments, the magnetic element is located on the side of the first arc-starting piece away from the second arc-starting piece, and the ends of the paired extensions away from the connecting portion are located on the side of the first arc-starting piece adjacent to the second arc-starting piece, so that the first arc-starting piece is located in the first magnetic field.

[0012] In some embodiments, when the moving contact is in the disconnected position, at least a portion of the moving contact and at least a portion of the inner chamber are located between the paired extensions.

[0013] In some embodiments, each of the paired extensions includes a first portion, the first portion of each of the paired extensions is connected to a connecting portion, and a portion of the moving contact and a portion of the inner cavity are located between the first portions of the paired extensions.

[0014] In some embodiments, the magnetic element is located on the side of the second arc-starting piece away from the first arc-starting piece, and the ends of the paired extensions away from the connecting portion are located on the side of the second arc-starting piece adjacent to the first arc-starting piece, so that the second arc-starting piece is located in the first magnetic field.

[0015] In some embodiments, when the moving contact is in the disconnected position, at least a portion of the stationary contact and at least a portion of the inner chamber are located between the paired extensions.

[0016] In some embodiments, each of the paired extensions includes a first portion, the first portion of each of the paired extensions being connected to a connecting portion, and a portion of the stationary contact and a portion of the inner cavity being located between the first portions of the paired extensions.

[0017] In some embodiments, the magnetic element is located on the side of the first arc-starting piece away from the second arc-starting piece, and the ends of the paired extensions away from the connecting portion are located on the side of the first arc-starting piece adjacent to the second arc-starting piece, so that the first arc-starting piece is located in the first magnetic field.

[0018] In a second aspect of this disclosure, an electrical switch is provided, the electrical switch comprising: any of the arc-extinguishing components according to the first aspect of this disclosure.

[0019] It should be understood that the description in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0020] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0021] Figure 1 shows a schematic diagram of the structure of an arc-extinguishing assembly according to some embodiments of the present disclosure;

[0022] Figure 2 shows an exploded view of the arc-extinguishing assembly shown in Figure 1;

[0023] Figure 3 shows a schematic diagram of the magnetic field distribution of the magnetic component and the magnetic conductive component shown in Figure 1;

[0024] Figure 4 shows a schematic diagram of the structure of an arc-extinguishing assembly according to some other embodiments of the present disclosure;

[0025] Figure 5 shows a schematic diagram of the magnetic field distribution of the magnetic component and the magnetic conductive component shown in Figure 4;

[0026] Figure 6 shows a schematic diagram of the structure of an arc-extinguishing assembly according to some other embodiments of the present disclosure;

[0027] Figure 7 shows a schematic diagram of the magnetic field distribution of the magnetic component and the magnetic conductive component shown in Figure 6;

[0028] Figure 8 shows a schematic diagram of the structure of an arc-extinguishing assembly according to some other embodiments of the present disclosure;

[0029] Figure 9 shows a schematic diagram of the magnetic field distribution of the magnetic component and the magnetic conductive component shown in Figure 8.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 is the arc extinguishing component, 101 is the first magnetic field, 102 is the second magnetic field, and 103 is the inner chamber;

[0032] 1 is the stationary contact, 11 is the stationary contact point; 2 is the moving contact, 21 is the moving contact point;

[0033] 3 is a magnetic component, 31 is the first pole, and 32 is the second pole;

[0034] 4 is a magnetic conductive component, 41 is a connecting part, 42 is an extension part, 421 is the first part, and 422 is the second part;

[0035] 5 is the arc extinguishing component, 51 is the arc extinguishing grid plate, 52 is the first arc ignition plate, and 53 is the second arc ignition plate;

[0036] X is the first direction. Detailed Implementation

[0037] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0038] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0039] As described above, conventional DC electrical switches, under low current conditions, face the challenge of near-zero or reverse air blowing and weak electromagnetic forces generated by a self-excited magnetic field, resulting in problems such as long arc stagnation time, long arc burning time, and arc retreat. Embodiments of this disclosure provide an arc-extinguishing component and electrical switch to at least partially solve the above problems. The principles of this disclosure will be described below with reference to Figures 1 to 9.

[0040] Figure 1 shows a structural schematic diagram of an arc-extinguishing assembly 100 according to some embodiments of the present disclosure. Figure 2 shows an exploded view of the arc-extinguishing assembly 100 shown in Figure 1. Figure 3 shows a schematic diagram of the magnetic field distribution of the magnetic element 3 and the magnetic conductor 4 shown in Figure 1. As shown in Figures 1 to 3, the arc-extinguishing assembly 100 described herein generally includes a stationary contact 1, a moving contact 2, a magnetic element 3, a magnetic conductor 4, and an arc-extinguishing element 5. An inner cavity 103 is provided between the arc-extinguishing element 5 and the stationary contact 1 and the moving contact 2.

[0041] Specifically, the moving contact 2 can switch between a conducting position and a disconnected position. When the moving contact 2 is in the conducting position, it is connected to the stationary contact 1. When the moving contact 2 is in the disconnected position, it can open to its maximum position and disconnect from the stationary contact 1. At the instant the moving contact 2 disconnects from the stationary contact 1, an electric arc is generated between them. The inventors have noted that, under low current conditions, on the one hand, the arc may stall on the moving contact 2 or the stationary contact 1 and fail to move to the arc-igniting plate; on the other hand, the arc may stall within the inner chamber 103 or move away from the arc-extinguishing element 5. These phenomena may occur at various locations within the inner chamber 103, including the side near the stationary contact 1, the side near the moving contact 2, and other locations.

[0042] Based on this, continuing to refer to Figures 1 to 3, in some embodiments, the magnetic element 3 includes a first pole 31 and a second pole 32, wherein the first pole 31 and the second pole 32 have opposite polarities. A magnetically conductive element 4 can be attached to the magnetic element 3, wherein the magnetically conductive element 4 can include a connecting portion 41 and a pair of extensions 42. The pair of extensions 42 are connected to the connecting portion 41, and the pair of extensions 42 are spaced apart from each other. The connecting portion 41 can be attached to the first pole 31 so that both the connecting portion 41 and the pair of extensions 42 are magnetized to be the same pole of the first pole 31. Thus, a first magnetic field 101 can be formed between the pair of extensions 42 and the second pole 32, and a second magnetic field 102 can be formed between the pair of extensions 42.

[0043] Referring again to Figures 1 through 3, at least a portion of at least one of the stationary contact 1, the moving contact 2, and the inner chamber 103 is located between the paired extensions 42. Preferably, at least one of the stationary contact 11, the moving contact 21, and at least a portion of the inner chamber 103 can be located between the paired extensions 42. The first magnetic field 101 is capable of guiding the arc toward one of the paired extensions 42; obviously, the arc guided by the first magnetic field 101 can be at at least one of the stationary contact 1, the moving contact 2, and the inner chamber 103. The second magnetic field 102 is capable of guiding the arc guided to a neighboring extension 42 toward the arc-extinguishing element 5.

[0044] According to embodiments of this disclosure, at least a portion of at least one of the stationary contact 1, the moving contact 2, and the inner chamber 103 is located between the paired extensions 42. The magnetic element 3 and the magnetically conductive element 4 can alter the distribution of the magnetic field, allowing the arc located at the aforementioned position to be guided towards one extension 42 by force in the first magnetic field 101. The guided arc is then guided towards the arc-extinguishing element 5 by force in the second magnetic field 102. In this manner, the arc-extinguishing assembly 100 of this disclosure can customize the structure of the paired extensions 42 in the magnetically conductive element 4 based on the arc-extinguishing performance of conventional electrical switches for small currents, and make the paired extensions 42 surround the area where the arc stagnates, thereby improving the non-polar arc-extinguishing effect of the electrical switch for small currents and avoiding problems such as long arc stagnation time, long arc burning time, and arc retreat.

[0045] Furthermore, according to the embodiments of this disclosure, the magnetic element 3 and the magnetic conductive element 4 do not need to be located inside the arc-extinguishing grid 51 to avoid separating the arc-extinguishing grid 51, thereby enabling the arc-extinguishing assembly 100 to also handle high-current arc extinguishing scenarios. In addition, the combination of the magnetic element 3 and the magnetic conductive element 4 can also achieve magnetization of varying degrees, thereby improving the arc-extinguishing effect for small currents.

[0046] The magnetic element 3 according to embodiments of this disclosure can be of various types known or available in the future, and the embodiments of this disclosure do not limit this. For example, in some embodiments, the magnetic element 3 can be a magnet.

[0047] Referring again to Figures 1 to 3, in some embodiments, the arc-extinguishing element 5 may include a first arc-initiating piece 52, a second arc-initiating piece 53, and a plurality of arc-extinguishing grid pieces 51. One end of the first arc-initiating piece 52 may be adjacent to the stationary contact 1, and the other end may be adjacent to one of the outermost arc-extinguishing grid pieces 51. When the moving contact 2 is in the open position, one end of the second arc-initiating piece 53 may be adjacent to the moving contact 2, and the other end may be adjacent to another outermost arc-extinguishing grid piece 51. Thus, when the arc is guided to the arc-extinguishing element 5, the stationary contact 1, the first arc-initiating piece 52, the plurality of arc-extinguishing grid pieces 51, the second arc-initiating piece 53, and the moving contact 2 can form a circuit, thereby achieving arc extinguishing.

[0048] Referring again to Figures 1 to 3, in some embodiments, the magnetic element 3 and the connecting portion 41 may be located on the side opposite to the other of the first arc-starting plate 52 and the second arc-starting plate 53. The ends of the paired extensions 42 opposite to the connecting portion 41 may be located on the side adjacent to the other of the first arc-starting plate 52 and the second arc-starting plate 53, so that one of the first arc-starting plates 52 and the second arc-starting plate 53 can be located in the first magnetic field 101, and one of the moving contact 2 and the stationary contact 1 can be located between the paired extensions 42. It can be understood that since the magnetic element 3 is adjacent to one of the first arc-starting plates 52 and the second arc-starting plate 53, the magnetic field can preferentially flow through the magnetic element 3 through one of the first arc-starting plates 52 and the second arc-starting plate 53 to form a short path, thereby avoiding loss to the second magnetic field 102 and ensuring that the arc can smoothly enter the arc-extinguishing element 5 under the action of the second magnetic field 102.

[0049] Similarly, if the length of the magnetic element 3 in the first direction X is sufficiently long, the magnetic field lines may not pass through the paired extensions 42 but flow through the second pole 32 of the connecting portion 41, or even return directly from the first pole 31 to the second pole 32, thereby causing a loss to the second magnetic field 102. To avoid causing a loss to the second magnetic field 102 and to ensure that the arc can smoothly enter the arc-extinguishing element 5 under the action of the second magnetic field 102, the length of the magnetic element 3 in the first direction X can be less than or equal to the width of the first arc-inducing plate 52 or the second arc-inducing plate 53 in the first direction X. The first direction X may include the direction in which one extension 42 points to the other extension 42.

[0050] As described above, the arc-extinguishing assembly 100 of this embodiment can customize the structure of the paired extensions 42 in the magnetic conductor 4 according to the arc-extinguishing performance of conventional electrical switches for small currents, and make the paired extensions 42 surround different areas where the arc is stagnant. In the examples of Figures 1 to 3, the arc is stagnant at, for example, the stationary contact 1, the moving contact 2, and the inner cavity 103.

[0051] Referring again to Figures 1 to 3, in some embodiments, when the moving contact 2 is in the disconnected position, at least a portion of the stationary contact 1, at least a portion of the moving contact 2, and at least a portion of the inner chamber 103 may be located between the paired extensions 42 to guide the arc located at the stationary contact 1, the moving contact 2, and the inner chamber 103 toward the arc extinguishing member 5.

[0052] Specifically, each of the paired extensions 42 may include a first portion 421 and a second portion 422. The first portion 421 of each pair of extensions 42 may be connected to the connecting portion 41. A portion of the stationary contact 1 and a portion of the inner cavity 103 may be located between the first portions 421 of the paired extensions 42. A portion of the moving contact 2 and a portion of the inner cavity 103 may be located between the second portions 422 of the paired extensions 42. In this manner, the arc located at the stationary contact 1, the moving contact 2, and the inner cavity 103 can be guided by force in the first magnetic field 101 towards one extension 42, and then the guided arc can be guided by force in the second magnetic field 102 towards the arc-extinguishing member 5.

[0053] Referring again to Figures 1 to 3, the magnetic element 3 and the connecting portion 41 can be located on the side of the first arc-inducing piece 52 away from the second arc-inducing piece 53. The ends of the paired extensions 42 away from the connecting portion 41 can be located on the side of the first arc-inducing piece 52 adjacent to the second arc-inducing piece 53, so that the first arc-inducing piece 52 is located in the first magnetic field 101, and the stationary contact 1 can be located between the paired extensions 42, thereby avoiding damage to the second magnetic field 102.

[0054] Referring again to Figures 2 and 3, the length of the magnetic element 3 in the first direction X can be less than or equal to the width of the first arc-inducing piece 52 in the first direction X.

[0055] Referring again to Figures 1 to 3, the connecting portion 41 can be located on the side of the stationary contact 1 away from the moving contact 2 and in contact with the stationary contact 1, and the magnetic element 3 can be adjacent to the first arc-extinguishing piece 52. In this way, not only can the arc located between the paired extensions 42 be guided by the first magnetic field 101 to move towards one of the extensions 42, but the arc located within the first magnetic field 101 but not between the paired extensions 42 can also be guided by the first magnetic field 101, and the arc can be guided outside the paired extensions 42. As shown in Figure 3, since a second magnetic field can be formed between the paired extensions 42, the second magnetic field is not only located in the area between the paired extensions 42, but also exists on the outside of the second part 422 of the paired extensions 42. This allows the arc located outside the second part 422 of the paired extensions 42 to also move towards the arc-extinguishing element 5 under the influence of the component of the second magnetic field 102.

[0056] It should be noted that, since the arc-extinguishing assembly 100 of this embodiment can guide the arc at the stationary contact 1 and the moving contact 2, as shown in FIG1, the magnetic element 3 can also be located on the side of the second arc-inducing plate 53 away from the first arc-inducing plate 52, and the ends of the paired extensions 42 away from the connecting portion 41 can be located on the side of the second arc-inducing plate 53 adjacent to the first arc-inducing plate 52. The connecting portion 41 can be located on the side of the moving contact 2 away from the stationary contact 1, and the magnetic element 3 can be adjacent to the second arc-inducing plate 53. That is, the magnetic element 3 and the magnetic conductor 4 in FIG1 are horizontally flipped 180°.

[0057] The principle of non-polar arc extinguishing in this disclosure will be explained below with the first pole 31 including an N pole and the second pole 32 including an S pole: As shown in Figure 3, when the current is reversed, the first magnetic field 101 guides the arc toward another extension 42. It can be seen that the magnetic field directions of adjacent extensions 42 are also reversed, thus ensuring that the arc can be guided to the arc extinguishing element 5 even when the current is reversed, thereby achieving non-polar arc extinguishing. It should be noted that when the first pole 31 includes an S pole and the second pole 32 includes an N pole, although the first magnetic field 101 is reversed, the second magnetic field 102 is also reversed, so the arc can still be guided to the arc extinguishing element 5 to achieve non-polar arc extinguishing. Obviously, the arc extinguishing components 100 in other examples below can also achieve non-polar arc extinguishing, which will not be elaborated here. In addition, the first magnetic field 101 and the second magnetic field 102 shown in Figure 3 are only illustrative examples and are not intended to limit the first magnetic field 101 and the second magnetic field 102.

[0058] Figure 4 shows a schematic diagram of the structure of an arc-extinguishing assembly 100 according to some other embodiments of the present disclosure. Figure 5 shows a schematic diagram of the magnetic field distribution of the magnetic element 3 and the magnetic conductor 4 shown in Figure 4. In the examples of Figures 4 and 5, the arc stops, for example, at the moving contact 2 and the inner cavity 103. The arc-extinguishing assembly 100 shown in Figures 4 and 5 has a similar structure to the arc-extinguishing assembly 100 shown in Figures 1 to 3, the main difference being the arc stopping position and the structure and position of the magnetic conductor 4. In the following text, the differences between the two will be mainly described, while the same parts will not be described again.

[0059] As shown in Figures 4 and 5, the arc-extinguishing assembly 100 described herein generally includes a stationary contact 1, a moving contact 2, a magnetic component 3, a magnetically conductive component 4, and an arc-extinguishing component 5. The structures of the stationary contact 1, the moving contact 2, the magnetic component 3, and the arc-extinguishing component 5 are similar to those described above in conjunction with Figures 1 to 3, and will not be repeated here.

[0060] Referring again to Figures 4 and 5, in some embodiments, when the moving contact 2 is in the disconnected position, at least a portion of the moving contact 2 and at least a portion of the inner chamber 103 may be located between the paired extensions 42 to guide the arc located at the moving contact 2 and the inner chamber 103 toward the arc extinguishing member 5.

[0061] Specifically, each of the paired extensions 42 may include a first portion 421. The first portions 421 of each pair of extensions 42 are connected to the connecting portion 41, and portions of the moving contact 2 and the inner cavity 103 are located between the first portions 421 of the paired extensions 42. In this way, the arc located at the moving contact 2 and the inner cavity 103 can be guided towards one extension 42 by force in the first magnetic field 101, and then the guided arc can be guided towards the arc-extinguishing member 5 by force in the second magnetic field 102.

[0062] Referring further to Figures 4 and 5, the magnetic element 3 can be located on the side of the second arc-starting piece 53 facing away from the first arc-starting piece 52. The ends of the paired extensions 42 facing away from the connecting portion 41 can be located on the side of the second arc-starting piece 53 adjacent to the first arc-starting piece 52, so that the second arc-starting piece 53 is located in the first magnetic field 101, and the moving contact 2 can be located between the paired extensions 42. This avoids damage to the second magnetic field 102.

[0063] Referring again to Figures 4 and 5, the connecting part 41 may be located on the side of the moving contact 2 away from the stationary contact 1, and the magnetic element 3 may be adjacent to the second arc-starting piece 53.

[0064] Referring further to Figures 4 and 5, the length of the magnetic element 3 in the first direction X can be less than or equal to the width of the second arc-leading piece 53 in the first direction X.

[0065] Figure 6 shows a schematic diagram of the structure of an arc-extinguishing assembly 100 according to some other embodiments of the present disclosure. Figure 7 shows a schematic diagram of the magnetic field distribution of the magnetic element 3 and the magnetic conductor 4 shown in Figure 6. In the examples of Figures 6 and 7, the arc is stopped, for example, at the stationary contact 1 and the inner cavity 103. The arc-extinguishing assembly 100 shown in Figures 6 and 7 has a similar structure to the arc-extinguishing assembly 100 shown in Figures 1 to 3, the main differences being the arc stopping position, the structure and position of the magnetic conductor 4, and the structure of the stationary contact 1. In the following text, the differences between the two will be mainly described, while the same parts will not be described again.

[0066] As shown in Figures 6 and 7, the arc-extinguishing assembly 100 described herein generally includes a stationary contact 1, a moving contact 2, a magnetic component 3, a magnetically conductive component 4, and an arc-extinguishing component 5. The structures of the moving contact 2, the magnetic component 3, and the arc-extinguishing component 5 are similar to those described above in conjunction with Figures 1 to 3, and will not be repeated here.

[0067] Referring again to Figures 6 and 7, in some embodiments, when the moving contact 2 is in the disconnected position, at least a portion of the stationary contact 1 and at least a portion of the inner chamber 103 may be located between the paired extensions 42 to guide the arc located at the stationary contact 1 and the inner chamber 103 toward the arc extinguishing member 5.

[0068] Specifically, each of the paired extensions 42 may include a first portion 421. The first portions 421 of each pair of extensions 42 may be connected to the connecting portion 41, and portions of the stationary contact 1 and the inner cavity 103 are located between the first portions 421 of the paired extensions 42. In this way, the electric arc located at the stationary contact 1 and the inner cavity 103 can be guided towards one extension 42 by force in the first magnetic field 101, and then the guided electric arc can be guided towards the arc-extinguishing member 5 by force in the second magnetic field 102.

[0069] Referring further to Figures 6 and 7, the magnetic element 3 can be located on the side of the first arc-inducing piece 52 facing away from the second arc-inducing piece 53. The ends of the paired extensions 42 facing away from the connecting portion 41 can be located on the side of the first arc-inducing piece 52 adjacent to the second arc-inducing piece 53, so that the first arc-inducing piece 52 is located in the first magnetic field 101, and the stationary contact 1 can be located between the paired extensions 42. This avoids damage to the second magnetic field 102.

[0070] Referring further to Figures 6 and 7, since the stationary contact 1 is bent and can form a space, the connecting part 41 and the magnetic element 3 can be located inside the stationary contact 1, and the magnetic element 3 can be adjacent to the first arc-starting piece 52.

[0071] Referring again to Figures 6 and 7, the length of the magnetic element 3 in the first direction X can be less than or equal to the width of the first arc-inducing piece 52 in the first direction X.

[0072] Figure 8 shows a schematic diagram of the structure of an arc-extinguishing assembly 100 according to some other embodiments of the present disclosure. Figure 9 shows a schematic diagram of the magnetic field distribution of the magnetic element 3 and the magnetic conductor 4 shown in Figure 8. In the examples of Figures 8 and 9, the arc stops, for example, at the stationary contact 1 and the inner chamber 103. The arc-extinguishing assembly 100 shown in Figures 8 and 9 has a similar structure to the arc-extinguishing assembly 100 shown in Figures 1 to 3, the main difference being the arc stopping position and the structure and position of the magnetic conductor 4. In the following text, the differences between the two will be mainly described, while the same parts will not be described again.

[0073] As shown in Figures 8 and 9, the arc-extinguishing assembly 100 described herein generally includes a stationary contact 1, a moving contact 2, a magnetic component 3, a magnetically conductive component 4, and an arc-extinguishing component 5. The structures of the stationary contact 1, the moving contact 2, the magnetic component 3, and the arc-extinguishing component 5 are similar to those described above in conjunction with Figures 1 to 3, and will not be repeated here.

[0074] Referring again to Figures 8 and 9, in some embodiments, when the moving contact 2 is in the disconnected position, at least a portion of the stationary contact 1 and at least a portion of the inner chamber 103 may be located between the paired extensions 42 to guide the arc located at the stationary contact 1 and the inner chamber 103 toward the arc extinguishing member 5.

[0075] Specifically, each of the paired extensions 42 may include a first portion 421. The first portions 421 of each pair of extensions 42 are connected to the connecting portion 41, and portions of the stationary contact 1 and the inner cavity 103 are located between the first portions 421 of the paired extensions 42. In this way, the electric arc located at the stationary contact 1 and the inner cavity 103 can be guided towards one extension 42 by force in the first magnetic field 101, and then the guided electric arc can be guided towards the arc-extinguishing member 5 by force in the second magnetic field 102.

[0076] Referring further to Figures 8 and 9, the magnetic element 3 can be located on the side of the first arc-inducing piece 52 away from the second arc-inducing piece 53. The ends of the paired extensions 42 away from the connecting portion 41 can be located on the side of the first arc-inducing piece 52 adjacent to the second arc-inducing piece 53, so that the first arc-inducing piece 52 is located in the first magnetic field 101, and the stationary contact 1 can be located between the paired extensions 42. This avoids damage to the second magnetic field 102.

[0077] Referring again to Figures 8 and 9, the connecting part 41 may be located on the side of the stationary contact 1 away from the moving contact 2 and in contact with the stationary contact 1, and the magnetic element 3 may be adjacent to the first arc-starting piece 52.

[0078] Referring further to Figures 8 and 9, the length of the magnetic element 3 in the first direction X can be less than or equal to the width of the first arc-leading piece 52 in the first direction X.

[0079] Embodiments of this disclosure also provide an electrical switch comprising any of the arc-extinguishing components 100 described above.

[0080] The arc-extinguishing design according to embodiments of this disclosure can be applied to various electrical switches to at least partially solve the above-mentioned problems. It should be understood that the arc-extinguishing design according to embodiments of this disclosure can also be applied to other electrical components, and the embodiments of this disclosure do not limit this application.

[0081] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An arc-extinguishing assembly (100), characterized in that, The arc-extinguishing assembly (100) includes: a stationary contact (1) and a moving contact (2); a magnetic element (3) including a first pole (31) and a second pole (32); a magnetic conductive element (4) including a connecting portion (41) and a pair of extension portions (42) connected to the connecting portion (41) and spaced apart from each other, the connecting portion (41) being in contact with the first pole (31), wherein a first magnetic field (101) can be formed between the pair of extension portions (42) and the second pole (32), and a second magnetic field (102) can be formed between the pair of extension portions (42); and an arc-extinguishing element (5). An inner cavity (103) is provided between the arc extinguishing element (5) and the stationary contact (1) and the moving contact (2); at least a portion of at least one of the stationary contact (1), the moving contact (2) and the inner cavity (103) is located between the paired extensions (42), wherein the first magnetic field (101) is capable of guiding the arc toward one of the paired extensions (42), and the second magnetic field (102) is capable of guiding the arc guided to the adjacent extension (42) toward the arc extinguishing element (5).

2. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The arc extinguishing element (5) includes a plurality of arc extinguishing grid plates (51), a first arc-inducing plate (52), and a second arc-inducing plate (53). The moving contact (2) can switch between a conducting position and a disconnected position. One end of the first arc-inducing plate (52) is adjacent to the stationary contact (1). When the moving contact (2) is in the disconnected position, one end of the second arc-inducing plate (53) is adjacent to the moving contact (2), and the other end of the first arc-inducing plate (52) and the other end of the second arc-inducing plate (53) are each adjacent to the outermost arc extinguishing grid plate (51) among the plurality of arc extinguishing grid plates (51).

3. The arc-extinguishing assembly (100) according to claim 2, characterized in that, The magnetic element (3) is located on one side of the first arc-starting piece (52) and the second arc-starting piece (53) away from the other one of the first arc-starting piece (52) and the end of the paired extension (42) away from the connecting portion (41) is located on one side of the first arc-starting piece (52) and the second arc-starting piece (53) adjacent to the other one of the first arc-starting piece (52) and the second arc-starting piece (53), so that one of the first arc-starting piece (52) and the second arc-starting piece (53) is located in the first magnetic field (101).

4. The arc-extinguishing assembly (100) according to claim 3, characterized in that, When the moving contact (2) is in the disconnected position, at least a portion of the stationary contact (1), at least a portion of the moving contact (2), and at least a portion of the inner chamber (103) are located between the paired extensions (42).

5. The arc-extinguishing assembly (100) according to claim 4, characterized in that, Each of the paired extensions (42) includes a first portion (421) and a second portion (422). The first portion (421) of each of the paired extensions (42) is connected to the connecting portion (41). A portion of the stationary contact (1) and a portion of the inner cavity (103) are located between the first portions (421) of the paired extensions (42), and a portion of the moving contact (2) and a portion of the inner cavity (103) are located between the second portions (422) of the paired extensions (42).

6. The arc-extinguishing assembly (100) according to claim 5, characterized in that, The magnetic element (3) is located on the side of the first arc-inducing piece (52) away from the second arc-inducing piece (53), and the ends of the paired extensions (42) away from the connecting portion (41) are located on the side of the first arc-inducing piece (52) adjacent to the second arc-inducing piece (53), so that the first arc-inducing piece (52) is located in the first magnetic field (101).

7. The arc-extinguishing assembly (100) according to claim 3, characterized in that, When the moving contact (2) is in the disconnected position, at least a portion of the moving contact (2) and at least a portion of the inner chamber (103) are located between the paired extensions (42).

8. The arc-extinguishing assembly (100) according to claim 7, characterized in that, Each of the paired extensions (42) includes a first portion (421), the first portion (421) of each of the paired extensions (42) is connected to the connecting portion (41), and a portion of the moving contact (2) and a portion of the inner cavity (103) are located between the first portions (421) of the paired extensions (42).

9. The arc-extinguishing assembly (100) according to claim 8, characterized in that, The magnetic element (3) is located on the side of the second arc-leading piece (53) away from the first arc-leading piece (52), and the end of the paired extension (42) away from the connecting part (41) is located on the side of the second arc-leading piece (53) adjacent to the first arc-leading piece (52), so that the second arc-leading piece (53) is located in the first magnetic field (101).

10. The arc-extinguishing assembly (100) according to claim 3, characterized in that, When the moving contact (2) is in the disconnected position, at least a portion of the stationary contact (1) and at least a portion of the inner chamber (103) are located between the paired extensions (42).

11. The arc-extinguishing assembly (100) according to claim 10, characterized in that, Each of the paired extensions (42) includes a first portion (421), the first portion (421) of each of the paired extensions (42) is connected to the connecting portion (41), and a portion of the stationary contact (1) and a portion of the inner cavity (103) are located between the first portions (421) of the paired extensions (42).

12. The arc-extinguishing assembly (100) according to claim 11, characterized in that, The magnetic element (3) is located on the side of the first arc-inducing piece (52) away from the second arc-inducing piece (53), and the ends of the paired extensions (42) away from the connecting portion (41) are located on the side of the first arc-inducing piece (52) adjacent to the second arc-inducing piece (53), so that the first arc-inducing piece (52) is located in the first magnetic field (101).

13. An electrical switch, characterized in that, The electrical switch includes: an arc-extinguishing assembly (100) according to any one of claims 1 to 12.

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