Electrical switch

Abstract

The embodiment of the utility model provides an electrical switch. The electrical switch comprises a moving contact assembly. The static contact comprises a supporting piece and a static contact point, the static contact point is arranged on the supporting piece, and the supporting piece surrounds the mounting space; the magnetic part is arranged in the mounting space; a first chamber is arranged between the arc extinguish chamber and the static contact and between the arc extinguish chamber and the moving contact assembly; and the magnetic conducting piece comprises a connecting part connected with one pole of the magnetic piece and paired extension parts connected with the connecting part, the connecting part is located in the mounting space, the paired extension parts are spaced from each other, and the part of the first cavity and the static contact are located between the paired extension parts.

Description

Technical Field

[0001] Embodiments of the present disclosure relate generally to the field of electrical equipment technology, and more particularly, to electrical switches. Background Art

[0002] As a protective switch, electrical switches must carry and interrupt the corresponding current. With conventional electrical switches, the arc stagnates on the silver contacts for an extended period of time at low currents, resulting in a prolonged arcing time. Furthermore, at rated currents, the arc cannot fully enter the arc-extinguishing grid, causing severe contact erosion and shortening the electrical lifespan.

[0003] Therefore, how to provide an electrical switch that can guarantee rated current and low current arc extinguishing performance is a technical problem that needs to be solved urgently. Utility Model Content

[0004] An object of the present disclosure is to provide an electrical switch to at least partially solve the above problems.

[0005] In one aspect of the present disclosure, an electrical switch is provided, which includes a moving contact assembly; a static contact, including a support member and a static contact, the static contact being arranged on the support member, and the support member surrounding an installation space; a magnetic member, arranged in the installation space; an arc extinguishing chamber, a first cavity being provided between the arc extinguishing chamber, the static contact, and the moving contact assembly; and a magnetic conductive member, including a connecting portion connected to one pole of the magnetic member and a pair of extensions connected to the connecting portion, the connecting portion being located in the installation space, the pair of extensions being spaced apart from each other, and portions of the first cavity and the static contact being located between the pair of extensions.

[0006] According to an embodiment of the present disclosure, a portion of the first chamber and the static contact are located between the paired extensions, and the magnetic member and the magnetic conductive member are capable of altering the distribution of the magnetic field, such that an arc located at the aforementioned position is forced in the first magnetic field and guided toward one of the extensions. The guided arc is then forced in the second magnetic field and moved toward the arc extinguishing member. In this way, the electrical switch of the present disclosure can achieve non-polarity arc extinguishing for low currents or rated currents while achieving arc extinguishing for high currents, thereby avoiding problems such as long arc stagnation times, long arcing times, and severe contact erosion.

[0007] In some embodiments, the support member includes an installation segment, a bending segment, and a wiring segment spaced apart from the installation segment, the two ends of the bending segment are respectively connected to the installation segment and the wiring segment, and the installation segment, the bending segment, and the wiring segment jointly surround the installation space.

[0008] In some embodiments, the static contact is arranged on a side of the installation segment facing away from the wiring segment, and the magnetic member is in contact with a side of the connecting portion facing away from the bending segment.

[0009] In some embodiments, the pair of extension portions are provided on a side of the connecting portion facing away from the wiring segment and extend away from the connecting portion, and a portion of the mounting segment is located between the pair of extension portions.

[0010] In some embodiments, the arc extinguishing chamber includes an insulating baffle, a pair of insulating side plates, a pair of arc-striking plates and a plurality of arc-extinguishing grids, the moving contact assembly includes a moving contact bracket and a moving contact, the pair of insulating side plates are arranged on a side of the insulating baffle adjacent to the moving contact, the plurality of arc-extinguishing grids are located between the pair of insulating side plates, and one end of the pair of arc-striking plates is respectively adjacent to the arc-extinguishing grids on the outer side of the plurality of arc-extinguishing grids.

[0011] In some embodiments, the moving contact is capable of switching between a conducting position and a disconnecting position, the other end of one of the pair of arc-striking pieces is adjacent to the side of the mounting section facing away from the wiring section, and when the moving contact is in the disconnecting position, the other end of the other arc-striking piece in the pair of arc-striking pieces is adjacent to the moving contact.

[0012] In some embodiments, the moving contact includes a first limiting structure, the electrical switch further includes a housing, the housing includes a second limiting structure, and the first limiting structure cooperates with the second limiting structure to limit the moving contact to the disconnecting position.

[0013] In some embodiments, the first limiting structure includes a pair of first guide slopes and a pair of first side surfaces, and the second limiting structure includes a pair of second guide slopes and a pair of second side surfaces, each of the pair of second guide slopes cooperates with the corresponding first guide slopes and the corresponding first side surfaces, and the distance between the pair of first side surfaces is smaller than the distance between the pair of second side surfaces.

[0014] In some embodiments, the electrical switch further includes a pair of gas producing parts, each of which is disposed on a corresponding insulating side plate and surrounds the first chamber together with the arc extinguishing chamber, the static contact, and the moving contact support.

[0015] In some embodiments, adjacent arc-extinguishing grids in the plurality of arc-extinguishing grids are spaced apart from each other and form a gap, the insulating barrier includes a plurality of gas outlets, and each of the plurality of gas outlets is aligned with a corresponding gap.

[0016] It should be understood that the content described in this section is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0018] Figure 1 A schematic structural diagram of an electrical switch according to some embodiments of the present disclosure is shown, wherein only half of the housing is shown;

[0019] Figure 2 Shown Figure 1 The schematic diagram of the structure of the electrical switch shown is from another perspective, wherein the arc extinguishing chamber and the gas generating part are not shown;

[0020] Figure 3 A schematic structural diagram of a static contact, a magnetic component, an arc extinguishing chamber, a magnetic conductive component, and a pair of gas generating components according to some embodiments of the present disclosure is shown;

[0021] Figure 4 Shown Figure 3 The components shown are schematically shown along another viewing angle;

[0022] Figure 5 shows a partial structural schematic diagram of an arc extinguishing chamber according to some embodiments of the present disclosure;

[0023] Figures 6 and 7 A schematic diagram of the cooperation between the first limiting structure and the second limiting structure according to some embodiments of the present disclosure is shown.

[0024] Description of reference numerals:

[0025] 100 is an electrical switch, 101 is an installation space, 102 is a first chamber, 103 is a second chamber, and 104 is a gap;

[0026] 1 is a moving contact assembly, 11 is a moving contact bracket, 12 is a moving contact, 121 is a moving contact point, 13 is a first limiting structure, 131 is a first guiding inclined surface, and 132 is a first side surface;

[0027] 2 is a static contact, 21 is a support member, 211 is a mounting section, 212 is a bending section, 213 is a wiring section, and 22 is a static contact point;

[0028] 3 is a magnetic part;

[0029] 4 is an arc extinguishing chamber, 41 is an insulating baffle, 411 is an air outlet, 42 is an insulating side plate, 43 is an arc striking plate, and 44 is an arc extinguishing grid;

[0030] 5 is a magnetic conductive member, 51 is a connecting portion, and 52 is an extending portion;

[0031] 6 is a housing, 61 is a second limiting structure, 611 is a second guiding inclined surface, and 612 is a second side surface;

[0032] 7 is a gas generating part, and 71 is an insulating part. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] As used herein, the term "including" and its variations represent open inclusion, i.e., "including but not limited to." Unless otherwise stated, the term "or" means "and / or." The term "based on" means "based at least in part on." The terms "one example embodiment" and "an 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 identical objects.

[0035] As described above, in conventional electrical switches, the arc stays on the silver contacts for too long under low current conditions, resulting in a long arcing time. Furthermore, under rated current conditions, the arc cannot fully enter the arc extinguishing grid, causing severe contact erosion, thereby affecting its electrical life. The embodiments of the present disclosure provide an electrical switch 100 to at least partially address the above-mentioned issues. Figures 1 to 7 The principles of the present disclosure are described.

[0036] Figure 1 1 shows a schematic structural diagram of an electrical switch 100 according to some embodiments of the present disclosure, wherein only half of the housing 6 is shown. Figure 2 Shown Figure 1 The illustrated schematic diagram of the structure of the electrical switch 100 is shown from another perspective, wherein the arc extinguishing chamber 4 and the gas generating element 7 are not shown. Figure 3 The structure diagram of the static contact 2, magnetic part 3, arc extinguishing chamber 4, magnetic conductive part 5 and paired gas generating parts 7 according to some embodiments of the present disclosure is shown. It should be noted that, Figures 1 to 2 The electrical switch 100 shown has some parts removed to better illustrate the internal structure. Figures 1 to 3As shown, the electrical switch 100 described herein generally includes a movable contact assembly 1, a stationary contact 2, a magnetic member 3, an arc extinguishing chamber 4, a magnetic conductive member 5, a housing 6, and a pair of gas-generating members 7. The housing 6 serves as a mounting carrier, and the movable contact assembly 1, the stationary contact 2, the magnetic member 3, the arc extinguishing chamber 4, the magnetic conductive member 5, and the pair of gas-generating members 7 are all located within the housing 6. A first chamber 102 is provided between the arc extinguishing chamber 4, the stationary contact 2, and the movable contact assembly 1.

[0037] refer to Figure 2 Specifically, the moving contact assembly 1 may include a moving contact support 11 and a moving contact 12. The moving contact 12 is arranged on the moving contact support 11. Driven by the moving contact support 11, the moving contact 12 can switch between the conducting position and the disconnecting position. When the moving contact 12 is in the conducting position, the moving contact 12 can conduct electricity with the static contact 2. When the moving contact 12 is in the disconnecting position, the moving contact 12 can open to the maximum position and disconnect from the static contact 2. At the moment when the moving contact 12 is disconnected from the static contact 2, an arc will be generated between the moving contact 12 and the static contact 2. The inventors have noticed that in the case of low current or rated current, on the one hand, the arc may stagnate on the static contact 2 and cannot move to the arc striking piece 43; on the other hand, the arc may stagnate in the first chamber 102 or move away from the arc extinguishing chamber 4, wherein the above phenomenon may occur on the side near the static contact 2 and other positions in the first chamber 102.

[0038] Based on this, reference Figures 1 to 3 In some embodiments, the static contact 2 may include a support member 21 and a static contact 22. The static contact 22 may be provided on the support member 21, and the support member 21 surrounds the installation space 101. The magnetic member 3 may be provided in the installation space 101. The magnetic conductive member 5 includes a connecting portion 51 and a pair of extension portions 52. The connecting portion 51 is located in the installation space 101 and is connected to one pole of the magnetic member 3. The pair of extension portions 52 may be connected to the connecting portion 51 so that both the connecting portion 51 and the pair of extension portions 52 can be magnetized by one pole of the magnetic member 3. The pair of extension portions 52 are spaced apart from each other. Thus, a first magnetic field can be formed between the pair of extension portions 52 and the other pole of the magnetic member 3, and a second magnetic field can be formed between the pair of extension portions 52.

[0039] Continue to refer Figures 1 to 3 In some embodiments, a portion of the first chamber 102 and the static contact 22 are located between the pair of extensions 52. Thus, the first magnetic field can guide the arc toward one of the pair of extensions 52. Obviously, the arc guided by the first magnetic field can be at the static contact 22 and the first chamber 102. The second magnetic field can guide the arc directed to the adjacent one of the extensions 52 toward the arc extinguishing chamber 4.

[0040] According to an embodiment of the present disclosure, a portion of the first chamber 102 and the static contact 22 are located between the paired extensions 52, and the magnetic member 3 and the magnetic conductive member 5 are capable of changing the distribution of the magnetic field, so that the arc located at the aforementioned position can be forced in the first magnetic field and guided toward one of the extensions 52, and then the guided arc can be forced in the second magnetic field and move toward the arc extinguishing member. In this way, the electrical switch 100 of the present disclosure embodiment can achieve non-polarity arc extinguishing effect for low currents or rated currents while achieving arc extinguishing for high currents, thereby avoiding problems such as long arc stagnation time, long arcing time, and severe contact erosion.

[0041] It should be noted that, when the current is reversed, the first magnetic field can guide the arc toward the other extension 52. Since the magnetic field directions of adjacent extensions 52 are also opposite, the arc can also be guided to the arc extinguishing chamber 4 when the current is reversed, thereby achieving non-polarity arc extinguishing. In addition, non-polarity arc extinguishing is not affected by the polarity of the pole connected to the magnetic member 3 and the connecting portion 51.

[0042] refer to Figures 1 to 3 In some embodiments, the support member 21 may include a mounting section 211, a bent section 212, and a wiring section 213. The wiring section 213 is spaced apart from the mounting section 211. The bent section 212 is connected to the mounting section 211 and the wiring section 213 at both ends, and the mounting section 211, the bent section 212, and the wiring section 213 collectively enclose the installation space 101. The static contact 22 may be disposed on a side of the mounting section 211 facing away from the wiring section 213 to mate with the movable contact 121 of the movable contact 12.

[0043] Figure 4 Shown Figure 3 The components shown are schematically illustrated along another viewing angle. Figure 5 FIG. 4 shows a partial structural diagram of the arc extinguishing chamber 4 according to some embodiments of the present disclosure. Figure 1 、 Figures 3 to 5 As shown, in some embodiments, the arc extinguishing chamber 4 may include a pair of arc-strike pieces 43 and a plurality of arc-extinguishing grids 44. One end of each pair of arc-strike pieces 43 may be adjacent to an outer arc-extinguishing grid 44 among the plurality of arc-extinguishing grids 44. The other end of one arc-strike piece 43 in the pair of arc-strike pieces 43 may be adjacent to the side of the mounting section 211 that is away from the wiring section 213, that is, the static contact 22 may be located on the same side of the mounting section 211 as the arc-strike piece 43. When the moving contact 12 is in the disconnected position, the other end of the other arc-strike piece 43 in the pair of arc-strike pieces 43 may be adjacent to the moving contact 12. Thus, when the arc is guided to the arc extinguishing chamber 4, the static contact 2, one arc-strike piece 43, a plurality of arc-extinguishing grids 44, the other arc-strike piece 43, and the moving contact 12 can form a passage, thereby achieving arc extinguishing.

[0044] Return Reference Figures 1 to 3 Furthermore, the magnetic member 3 can be fitted with the side of the connecting portion 51 away from the bent section 212, and the magnetic member 3 can be adjacent to one of the arc-striking pieces 43 adjacent to the static contact 2. The paired extensions 52 can be arranged on the side of the connecting portion 51 away from the wiring section 213 and extend away from the connecting portion 51, and a portion of the mounting section 211 can be located between the paired extensions 52. In this way, the arc-striking piece 43 adjacent to the static contact 2 can be located in the first magnetic field, and then the first magnetic field can preferentially flow through the arc-striking piece 43 through the magnetic member 3 to form a short path, thereby avoiding loss of the second magnetic field and ensuring that the arc can smoothly enter the arc extinguishing chamber 4 under the action of the second magnetic field.

[0045] Continue to refer Figure 1 、 Figures 3 to 5 In some embodiments, the arc extinguishing chamber 4 may further include an insulating baffle 41 and a pair of insulating side plates 42. The pair of insulating side plates 42 may be arranged on a side of the insulating baffle 41 adjacent to the moving contact 12 and spaced apart from each other. A plurality of arc extinguishing grids 44 are located between the pair of insulating side plates 42, and the plurality of arc extinguishing grids 44 can be limited by the pair of insulating side plates 42. The insulating baffle 41 can cover the plurality of arc extinguishing grids 44. The second chamber 103 may be located on a side of the insulating baffle 41 away from the moving contact 12. Therefore, in the embodiment of the present disclosure, the insulating baffle 41 can isolate the arc extinguishing grids 44 and can be directly opposite the second chamber 103 to avoid short circuiting of adjacent arc extinguishing grids 44 among the plurality of arc extinguishing grids 44 in the second chamber 103, thereby avoiding arc voltage drop and further preventing the arc extinguishing effect from being affected.

[0046] Continue to refer Figure 3 In some embodiments, the paired gas generating members 7 can each be disposed on a corresponding insulating side plate 42. The connection method between the gas generating members 7 and the insulating side plate 42 is not limited here. Figures 1 to 3 The paired gas generating parts 7 can surround the first chamber 102 together with the arc extinguishing chamber 4 , the static contact 2 and the moving contact support 11 .

[0047] Understandably, one side of the paired gas-generating members 7 is connected to the corresponding insulating side plate 42, and the other side of the paired gas-generating members 7 is adjacent to the movable contact 121 and the static contact 22. Due to the high temperature of the arc, the paired gas-generating members 7 are able to release gas at high temperatures, causing the pressure in the first chamber 102 adjacent to the movable contact support 11 to be greater than the pressure in the first chamber 102 adjacent to the arc extinguishing chamber 4. This pressure difference assists the arc in moving toward the arc extinguishing chamber 4.

[0048] The gas generating member 7 according to the embodiment of the present disclosure may include various types of materials currently known or available in the future, and the embodiment of the present disclosure is not limited thereto, as long as it can release gas under high temperature environment. For example, in some embodiments, the gas generating member 7 may be a nylon member. In addition, referring to Figures 3 and 4 The gas generating member 7 is further provided with an insulating portion 71 that wraps the extension portion 52 to prevent the extension portion 52 from being conducted by the static contact 2 .

[0049] Continue to refer Figures 4 and 5 Furthermore, adjacent arc-extinguishing grids 44 in the plurality of arc-extinguishing grids 44 are spaced apart from each other and form a gap 104. The insulating baffle 41 may include a plurality of gas outlets 411, and each of the plurality of gas outlets 411 may be aligned with a corresponding gap 104. Thus, the high-temperature gas in the first chamber 102 can be discharged to the outside through the gap 104 and the gas outlets 411.

[0050] It should be noted that if the size of the gas outlet 411 is larger than the size of the gap 104, in other words, the insulating baffle 41 does not completely cover the arc-quenching grids 44, then there is still a risk of short-circuiting adjacent arc-quenching grids 44 within the second chamber 103. Therefore, in the embodiment of the present disclosure, the size of the gas outlet 411 can be smaller than or equal to the size of the gap 104 to avoid short-circuiting adjacent arc-quenching grids 44, and this is not limited here.

[0051] Return Reference Figure 2 In some embodiments, the movable contact 12 may include a first limiting structure 13. The housing 6 may include a second limiting structure 61. The first limiting structure 13 can cooperate with the second limiting structure 61 to limit the movable contact 12 to the disconnected position, thereby preventing the movable contact 12 from rebounding due to excessive impact force when opening, thereby preventing arc voltage drops.

[0052] The first limiting structure 13 and the second limiting structure 61 according to the embodiment of the present disclosure can be various types of limiting structures currently known or available in the future, and the embodiment of the present disclosure does not limit this. Figures 6 and 7 FIG. 1 shows a schematic diagram of the cooperation between the first limiting structure 13 and the second limiting structure 61 according to some embodiments of the present disclosure. Figure 2 、 Figures 6 and 7 As shown, in some embodiments, the first retaining structure 13 may include a pair of first guide slopes 131 and a pair of first side surfaces 132. Correspondingly, the second retaining structure 61 may include a pair of second guide slopes 611 and a pair of second side surfaces 612. Each of the pair of second guide slopes 611 can cooperate with the corresponding first guide slope 131 and the corresponding first side surface 132. The distance between the pair of first side surfaces 132 is smaller than the distance between the pair of second side surfaces 612.

[0053] refer to Figures 6 and 7 As can be understood, during the process of switching the movable contact 12 from the conducting position to the disconnecting position, the paired second guide slopes 611 first cooperate with the corresponding first guide slopes 131 to provide guidance. Then, the paired second guide slopes 611 cooperate with the corresponding first side surfaces 132, and the paired first side surfaces 132 can drive the paired second side surfaces 612 to gradually separate. Finally, the paired first side surfaces 132 move between the paired second side surfaces 612, and the movable contact 12 forms an interference fit with the housing 6, thereby confining the movable contact 12 in the disconnecting position.

[0054] The arc extinguishing design according to the embodiment of the present disclosure can be applied to various electrical switches to at least partially solve the above problems. It should be understood that the arc extinguishing design according to the embodiment of the present disclosure can also be applied to other electrical components, and the embodiment of the present disclosure is not limited thereto.

[0055] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of 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 selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electrical switch (100), characterized in that The electrical switch (100) comprises: Moving contact assembly (1); A static contact (2) comprising a support member (21) and a static contact point (22), wherein the static contact point (22) is arranged on the support member (21), and the support member (21) surrounds an installation space (101); A magnetic component (3) is arranged in the installation space (101); An arc extinguishing chamber (4), wherein a first chamber (102) is provided between the arc extinguishing chamber (4), the static contact (2) and the moving contact assembly (1); and A magnetic conductive member (5) comprises a connecting portion (51) connected to one pole of the magnetic member (3) and a pair of extension portions (52) connected to the connecting portion (51), wherein the connecting portion (51) is located in the installation space (101), the pair of extension portions (52) are spaced apart from each other, and a portion of the first chamber (102) and the static contact (22) are located between the pair of extension portions (52).

2. The electrical switch (100) according to claim 1, characterized in that The support member (21) comprises a mounting section (211), a bending section (212), and a wiring section (213) spaced apart from the mounting section (211); both ends of the bending section (212) are respectively connected to the mounting section (211) and the wiring section (213); and the mounting section (211), the bending section (212), and the wiring section (213) jointly surround the mounting space (101).

3. The electrical switch (100) according to claim 2, characterized in that The static contact (22) is arranged on a side of the installation section (211) facing away from the wiring section (213), and the magnetic member (3) is in contact with a side of the connection portion (51) facing away from the bending section (212).

4. The electrical switch (100) according to claim 2, characterized in that The pair of extension portions (52) are arranged on a side of the connection portion (51) away from the wiring segment (213) and extend away from the connection portion (51), and a portion of the installation segment (211) is located between the pair of extension portions (52).

5. The electrical switch (100) according to claim 2, characterized in that The arc extinguishing chamber (4) comprises an insulating baffle (41), a pair of insulating side plates (42), a pair of arc-striking pieces (43) and a plurality of arc-striking grids (44); the moving contact assembly (1) comprises a moving contact support (11) and a moving contact (12); the pair of insulating side plates (42) are arranged on a side of the insulating baffle (41) adjacent to the moving contact (12); the plurality of arc-striking grids (44) are located between the pair of insulating side plates (42); and one end of the pair of arc-striking pieces (43) is respectively adjacent to the outermost arc-striking grid (44) among the plurality of arc-striking grids (44).

6. The electrical switch (100) according to claim 5, characterized in that The moving contact (12) is capable of switching between a conducting position and a disconnecting position, the other end of one of the paired arc-striking pieces (43) is adjacent to a side of the mounting section (211) facing away from the wiring section (213), and when the moving contact (12) is in the disconnecting position, the other end of the other arc-striking piece (43) in the paired arc-striking pieces (43) is adjacent to the moving contact (12).

7. The electrical switch (100) according to claim 6, characterized in that The movable contact (12) includes a first limiting structure (13), the electrical switch (100) further includes a housing (6), the housing (6) includes a second limiting structure (61), and the first limiting structure (13) cooperates with the second limiting structure (61) to limit the movable contact (12) to the disconnecting position.

8. The electrical switch (100) according to claim 7, characterized in that The first limiting structure (13) includes a pair of first guiding inclined surfaces (131) and a pair of first side surfaces (132), and the second limiting structure (61) includes a pair of second guiding inclined surfaces (611) and a pair of second side surfaces (612), and the pair of second guiding inclined surfaces (611) respectively cooperates with the corresponding first guiding inclined surfaces (131) and the corresponding first side surfaces (132), and the distance between the pair of first side surfaces (132) is smaller than the distance between the pair of second side surfaces (612).

9. The electrical switch (100) according to claim 5, characterized in that The electrical switch (100) further includes a pair of gas-generating parts (7), each of which is arranged on a corresponding insulating side plate (42) and surrounds the first chamber (102) together with the arc extinguishing chamber (4), the static contact (2) and the moving contact support (11).

10. The electrical switch (100) according to claim 9, characterized in that Adjacent arc-extinguishing grids (44) in the plurality of arc-extinguishing grids (44) are spaced apart from each other and form a gap (104); the insulating baffle (41) includes a plurality of gas outlets (411), and each of the plurality of gas outlets (411) is aligned with a corresponding gap (104).

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