Arc extinguishing structure and contactor

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an arc extinguishing structure and a contactor. The arc extinguishing structure comprises an arc extinguishing grid plate and an arc striking piece; the arc striking piece comprises a first extension part and a second extension part, the second extension part extends along a first direction, the first extension part comprises a first branch part and a second branch part which are arranged at an interval and respectively extend along a second direction, a first end of the second branch part is connected with a first end of the second extension part, and a second end of the second branch part is connected with a first end of the first branch part; the second end of the first branch part is connected with the middle part of the second extension part, the second end of the first branch part is higher than the first end, and the arc extinguishing grid plate is arranged above the first branch part. According to the arc extinguishing structure, the first branch part with the second end higher than the first end is arranged, so that the arc generated when the static contact and the moving contact are separated can be guided to enter the arc extinguishing grid, the arcing time of the arc is shortened, the service life of the static contact and the moving contact can be prolonged, and the breaking capacity of the contactor is ensured to be good.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an arc extinguishing structure and a contactor. Background Art

[0002] In the contactor, the arc generated when the moving contact and the stationary contact are separated from each other is introduced into each arc extinguishing grid in the arc extinguishing chamber through the arc-starting piece, so that the arc extinguishing grid is extinguished; however, since the current arc-starting piece and the arc extinguishing grid are far apart, it is not conducive to the arc-starting piece to introduce the arc into each arc extinguishing grid, resulting in a longer arcing time, reducing the service life of the moving contact and the stationary contact, and making the breaking capacity of the contactor poor.

[0003] Therefore, an arc extinguishing structure and a contactor are urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an arc extinguishing structure and a contactor, which can help guide the arc generated when the static contact and the moving contact are separated into the arc extinguishing grid, reduce the arc burning time of the arc, so as to increase the service life of the static contact and the moving contact, and ensure the better breaking capacity of the contactor.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The arc extinguishing structure is arranged close to the static contact and the moving contact, and includes:

[0007] Arc quenching grid;

[0008] An arc-striking member comprises a first extension portion and a second extension portion, wherein the second extension portion extends along a first direction, the first extension portion comprises a first sub-portion and a second sub-portion which are arranged at intervals and extend respectively along a second direction, the first end of the second sub-portion is connected to the first end of the second extension portion, the second end of the second sub-portion is connected to the first end of the first sub-portion, the second end of the first sub-portion is connected to the middle portion of the second extension portion, and the second end of the first sub-portion is arranged higher than the first end, and the arc-extinguishing grid is placed above the first sub-portion.

[0009] As an optional solution, the first subdivision includes:

[0010] An arc-striking plate, wherein the first end of the arc-striking plate is connected to the second end of the second subsection, the second end of the arc-striking plate is connected to the middle of the second extension portion, and the arc-striking plate is inclined, and the second end of the arc-striking plate is higher than the first end.

[0011] As an optional solution, the first subdivision includes:

[0012] A first horizontal plate extending along a second direction, wherein a first end of the first horizontal plate is connected to a second end of the second subsection;

[0013] A bending plate, wherein the bending plate is arranged obliquely, and the first end of the bending plate is arranged lower than the second end, and the first end of the bending plate is connected to the second end of the first horizontal plate;

[0014] An arc-starting plate, wherein the first end of the arc-starting plate is connected to the second end of the bending plate, and the second end of the arc-starting plate is connected to the middle portion of the second extension portion.

[0015] As an optional solution, the lowest point of the arc-starting plate in the first direction is 1 mm-10 mm higher than the first horizontal plate.

[0016] As an optional solution, the angle between the bent plate and the first horizontal plate is 5°-60°.

[0017] As an optional solution, the angle between the arc-starting plate and the first horizontal plate is 2°-45°.

[0018] As an optional solution, the arc-starting plate is parallel to the first horizontal plate.

[0019] As an optional solution, the arc-starting member further includes:

[0020] A connecting piece, both ends of which are respectively connected to the second end of the second section and the first end of the first section, a plurality of spaced-apart connecting pieces are connected between the second end of the second section and the first end of the first section, and an installation space for installing the static contact is formed between two adjacent connecting pieces.

[0021] As an optional solution, the connecting member includes:

[0022] A first protruding plate, a connecting plate and a second protruding plate, wherein the first end of the first protruding plate is connected to the first end of the first branch, the second end of the first protruding plate is connected to the first end of the connecting plate, the second end of the connecting plate is connected to the first end of the second protruding plate, and the second end of the second protruding plate is connected to the second end of the second branch.

[0023] As an optional solution, the second subdivision includes:

[0024] A second horizontal plate extends along a second direction, a first end of the second horizontal plate is connected to a first end of the second extension portion, and a second end of the second horizontal plate is connected to a first end of the first branch portion.

[0025] As an optional solution, the second subdivision includes:

[0026] A first plate, a second plate and a third plate are connected in sequence, wherein the first plate is located parallel to and above the third plate, two ends of the second plate are respectively connected to the first end of the first plate and the first end of the third plate, the second end of the third plate is connected to the first end of the second extension portion, and the second end of the first plate is connected to the first end of the first branch portion.

[0027] A contactor, comprising the arc extinguishing structure as described above, and further comprising:

[0028] Pedestal;

[0029] A stationary contact is located in the base, and a first end of the stationary contact is limitedly installed in the arc-starting member;

[0030] A wiring board is installed on the base, and the second end of the static contact is connected to the wiring board.

[0031] Beneficial effects:

[0032] The arc extinguishing structure proposed by the utility model is that the arc striking member includes a first extension portion for striking an arc and a second extension portion for mounting support, the first extension portion includes a first sub-portion and a second sub-portion which are arranged at intervals and extend respectively along the second direction, the first end of the second sub-portion is connected to the first end of the second extension portion, the second end of the second sub-portion is connected to the first end of the first sub-portion, the second end of the first sub-portion is connected to the middle of the second extension portion, and the second end of the first sub-portion is arranged higher than the first end; since the arc extinguishing grid is placed above the first sub-portion, and the second end of the first sub-portion is arranged higher than the first end, the spacing between the first sub-portion and the arc extinguishing grid is shortened, so that the first sub-portion can be arranged closer to the arc extinguishing grid, the distance between the first sub-portion and the arc extinguishing grid is reduced, which is beneficial to guiding the arc generated when the static contact and the moving contact are separated to enter the arc extinguishing grid, reducing the arc burning time of the arc, thereby improving the service life of the static contact and the moving contact.

[0033] The contactor proposed in the utility model, because it includes the above-mentioned arc extinguishing structure, can improve the arc striking ability, so as to be able to quickly extinguish the arc generated when the static contact and the moving contact are separated, so that the burning time of the arc is shorter, so as to be able to increase the service life of the static contact and the moving contact, and can ensure that the breaking capacity of the entire contactor is better, thereby being able to meet the market requirements for the breaking between the static contact and the moving contact under high voltage and high current conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the contactor provided in the utility model (excluding the moving contact and contact support) Figure 1 ;

[0035] Figure 2The structure diagram of the contactor provided in the utility model (excluding the base, and the first subdivision includes the arc-starting plate, and the second subdivision includes the first plate, the second plate, and the third plate) Figure 2 ;

[0036] Figure 3 The utility model provides an arc-starting member (the first subdivision includes an arc-starting plate, and the second subdivision includes a first plate, a second plate, and a third plate), a wiring board, and an assembly structure between the static contact Figure 1 ;

[0037] Figure 4 The utility model provides an assembly structure diagram of the arc-starting member, the terminal block and the static contact. Figure 2 ;

[0038] Figure 5 This is a schematic diagram of the structure of the arc-starting member (installed with a static contact) provided in the utility model. Figure 1 ;

[0039] Figure 6 This is a schematic diagram of the structure of the arc-starting member (arc-starting plate is parallel to the first horizontal plate) provided in the utility model. Figure 2 .

[0040] In the figure:

[0041] 1. Arc starting parts;

[0042] 11. first extension portion; 111. first subdivision; 1111. arc-starting plate; 1112. first horizontal plate; 1113. bending plate; 1114. first protruding plate; 112. second subdivision; 1121. second protruding plate; 1122. second horizontal plate; 1123. first plate; 1124. second plate; 1125. third plate; 113. connecting plate; 114. connecting member; 115. installation space; 116. bump;

[0043] 12. second extension portion; 121. inner groove;

[0044] 2. Base; 3. Static contact; 4. Terminal block; 5. Pad; 6. Moving contact; 7. Contact support. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] This embodiment proposes an arc extinguishing structure and a contactor including the arc extinguishing structure; wherein, Figure 1 and Figure 2 As shown, the contactor also includes a base 2, a static contact 3, a terminal block 4 and a pad 5, the static contact 3 is located in the base 2, and the first end of the static contact 3 is limitedly installed in the arc extinguishing structure; one end of the terminal block 4 is installed in the base 2, and the other end of the terminal block 4 extends to the outside of the base 2 along the second direction, and the second end of the static contact 3 is connected to the terminal block 4; the pad 5 is installed in the base 2 and supported on the bottom end of the terminal block 4, so that the installation height of the terminal block 4 in the base 2 can be adjusted by the pad 5, so that the installation position between the arc extinguishing structure and the static contact 3 matches.

[0050] Specifically, Figure 1 and Figure 2As shown, the contactor further includes a contact support 7 and a moving contact 6. The contact support 7 is installed in the base 2, and the moving contact 6 is installed on the contact support 7. The moving contact 6 is located above the stationary contact 3, and the moving contact 6 can move up and down along the first direction, so that the moving contact 6 can abut against or move away from the stationary contact 3 to achieve the closing or opening of the contactor. The contactor in this embodiment can be specifically an air contactor. Among them, the first direction is specifically as shown in FIG. Figure 1 and Figure 2 As shown by the arrow Z in .

[0051] It is worth noting that if Figure 1 and Figure 2 As shown, the above-mentioned arc extinguishing structure, pad 5, static contact 3 and terminal block 4 are respectively arranged on opposite sides of the contact support 7 along the second direction, so that opposite ends of the moving contact 6 can respectively abut against the static contacts 3 located on both sides; and a plurality of static contacts 3 are limitedly installed in the arc extinguishing structure located on one side. In this embodiment, three static contacts 3 are limitedly installed in the arc extinguishing structure located on one side, and correspondingly, three moving contacts 6 are arranged on the contact support 7.

[0052] Specifically, Figures 1 to 5 As shown, the arc extinguishing structure is arranged near the above-mentioned static contact 3 and the moving contact 6, and the arc extinguishing structure includes an arc extinguishing grid and an arc striking member 1; wherein the arc striking member 1 includes a first extension portion 11 and a second extension portion 12, the second extension portion 12 extends along the first direction, the first extension portion 11 includes a first sub-portion 111 and a second sub-portion 112 arranged at intervals and extending respectively along the second direction, the first end of the second sub-portion 112 is connected to the first end of the second extension portion 12, the second end of the second sub-portion 112 is connected to the first end of the first sub-portion 111, the second end of the first sub-portion 111 is connected to the middle part of the second extension portion 12, and the second end of the first sub-portion 111 is arranged higher than the first end, and the arc extinguishing grid is placed above the first sub-portion 111. The second direction is specifically as follows: Figure 1 and Figure 2 As indicated by the arrow X in FIG.

[0053] Compared with the prior art, the arc extinguishing structure in this embodiment changes the structure of the arc striking member 1, such as Figure 5As shown; the arc-starting member 1 includes a first extension portion 11 for arc-starting and a second extension portion 12 for mounting support, and the first extension portion 11 includes a first sub-portion 111 and a second sub-portion 112 which are arranged at intervals and extend respectively along the second direction, the first end of the second sub-portion 112 is connected to the first end of the second extension portion 12, the second end of the second sub-portion 112 is connected to the first end of the first sub-portion 111, the second end of the first sub-portion 111 is connected to the middle of the second extension portion 12, and the second end of the first sub-portion 111 is arranged higher than the first end, and because the arc-extinguishing grid is placed in the first The top of the division 111 is used to reduce the distance between the first division 111 and the arc extinguishing grid, so that the first division 111 can be arranged closer to the arc extinguishing grid, reducing the distance between the first division 111 and the arc extinguishing grid, which is beneficial to guiding the arc generated when the static contact 3 is separated from the moving contact 6 to enter the arc extinguishing grid, reducing the arc burning time of the arc, thereby increasing the service life of the static contact 3 and the moving contact 6, so as to ensure that the breaking capacity of the entire contactor is better, and furthermore, it can meet the market requirements for the breaking between the static contact 3 and the moving contact 6 under high voltage and high current conditions.

[0054] In one embodiment, if Figure 2 and Figure 3 As shown, the first section 111 includes an arc-striking plate 1111, a first end of the arc-striking plate 1111 is connected to the second end of the second section 112, a second end of the arc-striking plate 1111 is connected to the middle of the second extension portion 12, the arc-striking plate 1111 is tilted, and the second end of the arc-striking plate 1111 is higher than the first end, so that the second end of the first section 111 is higher than the first end, so that the arc-striking plate 1111 can be arranged upward along the first direction close to the arc extinguishing grid.

[0055] Furthermore, in this embodiment, if Figure 4 and Figure 5 As shown, the first section 111 includes a first horizontal plate 1112, a bending plate 1113 and an arc-starting plate 1111; wherein, the first horizontal plate 1112 extends along the second direction, and the first end of the first horizontal plate 1112 is connected to the second end of the second section 112; the bending plate 1113 is inclined, the first end of the bending plate 1113 is lower than the second end, and the first end of the bending plate 1113 is connected to the second end of the first horizontal plate 1112; the first end of the arc-starting plate 1111 is connected to the second end of the bending plate 1113, and the second end of the arc-starting plate 1111 is connected to the middle of the second extension portion 12.

[0056] By setting the bending plate 1113, the arc-striking plate 1111 can be made higher than the first horizontal plate 1112 in the first direction, so that the setting position of the arc-striking plate 1111 in the first direction can be increased by the bending plate 1113, ensuring that the second end of the first section 111 is set higher than the first end, so that the arc-striking plate 1111 can be set upward along the first direction close to the arc-extinguishing grid, thereby reducing the distance between the first section 111 and the arc-extinguishing grid, which is beneficial to guiding the arc generated when the static contact 3 and the moving contact 6 are separated into the arc-extinguishing grid, thereby ensuring the breaking capacity of the entire contactor.

[0057] Furthermore, the lowest point of the arc-striking plate 1111 in the first direction is higher than the first horizontal plate 1112 by 1mm-10mm, so that the height of the arc-striking plate 1111 relative to the arc-extinguishing grid is more appropriately set, so as to ensure a better arc-guiding effect of the arc-striking plate 1111 while avoiding interference between the arc-striking plate 1111 and the arc-extinguishing grid.

[0058] Specifically, the angle between the bending plate 1113 and the first horizontal plate 1112 is 5°-60°, so that the connection angles between the bending plate 1113 and the arc-striking plate 1111 and the first horizontal plate 1112 are more appropriate, so as to avoid the connection between the bending plate 1113 and the first horizontal plate 1112 or the arc-striking plate 1111 being easily broken due to the excessive inclination angle of the bending plate 1113, thereby ensuring the reliability of the connection between the bending plate 1113 and the first horizontal plate 1112 and the arc-striking plate 1111.

[0059] Furthermore, the angle between the arc-striking plate 1111 and the first horizontal plate 1112 is 2°-45°, that is, the arc-striking plate 1111 is inclined relative to the first horizontal plate 1112, so as to increase the height difference between the second end and the first end of the first section 111, so that the arc-striking plate 1111 is arranged closer to the arc-extinguishing grid, so as to further reduce the distance between the first section 111 and the arc-extinguishing grid, and further enable the first section 111 to be arranged closer to the arc-extinguishing grid, so as to better reduce the arc burning time of the arc.

[0060] In other embodiments, Figure 6 As shown, the arc-starting plate 1111 is arranged to extend horizontally along the second direction, so that the arc-starting plate 1111 is parallel to the first horizontal plate 1112, and the arc-starting plate 1111 is no longer arranged to be inclined, as shown in FIG. Figure 6 The arc-starting plate 1111 is shown in the figure; here, whether the arc-starting plate 1111 is tilted and the tilt angle are not limited.

[0061] Furthermore, if Figures 1 to 5As shown, the arc-starting member 1 further includes a connecting member 114, the two ends of which are respectively connected to the second end of the second sub-portion 112 and the first end of the first sub-portion 111, and a plurality of spaced connecting members 114 are connected between the second end of the second sub-portion 112 and the first end of the first sub-portion 111, and an installation space 115 for installing the static contact 3 is formed between two adjacent connecting members 114. Among them, a plurality of installation spaces 115 are formed in the third direction, and the third direction is specifically as follows: Figure 1 and Figure 2 As shown by arrow Y in FIG.

[0062] By forming an installation space 115 between two adjacent connecting pieces 114, the stationary contact 3 can be limitedly clamped in the installation space 115. On the one hand, it is convenient to install the stationary contact 3, so that the assembly between the stationary contact 3 and the arc-striking piece 1 is simpler and more convenient, and the installation stability of the stationary contact 3 in the arc-striking piece 1 can be ensured; on the other hand, it can realize the quick installation between the stationary contact 3 and the arc-striking piece 1, so that the installation of the stationary contact 3 is time-saving and labor-saving, and the installation efficiency is higher.

[0063] Specifically, Figures 3 to 6 As shown, the connecting member 114 includes a first protruding plate 1114, a connecting plate 113 and a second protruding plate 1121. The first end of the first protruding plate 1114 is connected to the first end of the first section 111, the second end of the first protruding plate 1114 is connected to the first end of the connecting plate 113, the second end of the connecting plate 113 is connected to the first end of the second protruding plate 1121, and the second end of the second protruding plate 1121 is connected to the second end of the second section 112.

[0064] Specifically, if Figure 1 , Figure 4 and Figure 5 As shown, the first end of the first protruding plate 1114 is connected to the first end of the first horizontal plate 1112, so that the first horizontal plate 1112 is arranged close to the static contact 3; since the moving contact 6 is located above the static contact 3, when the moving contact 6 moves downward along the first direction to abut against the static contact 3, relative to the inclined bending plate 1113 and the arc-starting plate 1111, the horizontally arranged first horizontal plate 1112 can provide an escape space for the moving contact 6, thereby ensuring that when the moving contact 6 abuts against the static contact 3 downward along the first direction, the arc-starting member 1 will not interfere with the moving contact 6, thereby ensuring that the moving contact 6 and the static contact 3 can be smoothly abutted.

[0065] In other embodiments, Figure 2 and Figure 3As shown, the first end of the first protruding plate 1114 is connected to the first end of the arc-striking plate 1111, and the first end of the arc-striking plate 1111 is lower than the bottom end surface of the static contact 3. The inclination of the first end of the arc-striking plate 1111 is relatively gentle, which is basically equivalent to a horizontal setting, so that it is convenient to provide an escape space for the moving contact 6 through the first end of the arc-striking plate 1111, thereby avoiding interference between the arc-striking member 1 and the moving contact 6.

[0066] Furthermore, in this embodiment, if Figures 4 to 6 As shown, the second section 112 includes a second horizontal plate 1122, which extends along the second direction, the first end of the second horizontal plate 1122 is connected to the first end of the second extension portion 12, the second end of the second horizontal plate 1122 is connected to the second end of the second protruding plate 1121, and the second horizontal plate 1122 is horizontally pressed against the static contact 3 along the second direction and suspended above the terminal block 4.

[0067] By providing a horizontally arranged second horizontal plate 1122, the processing of the second section 112 can be simplified and convenient, and the wear of the mold used for processing the second horizontal plate 1122 can be reduced, so that the service life of the mold can be increased, thereby saving the processing cost of the second section 112.

[0068] It is worth noting that if Figures 4 to 6 As shown, the second extension portion 12 includes a vertical plate, and the vertical plate and the second horizontal plate 1122 are an integrally formed structure, so as to be more conducive to reducing the processing difficulty and processing cost of the arc-striking member 1; and, inner grooves 121 are respectively provided on the vertical plate on the opposite sides in the third direction, and two protrusions 116 are correspondingly provided on the arc-striking plate 1111, and one protrusion 116 can be limitedly installed in an inner groove 121, and the arc-striking plate 1111 abuts against one side of the vertical plate to realize the connection between the arc-striking plate 1111 and the second extension portion 12. The connection method is simple and convenient, which is conducive to the rapid installation and disassembly between the arc-striking plate 1111 and the second extension portion 12.

[0069] In other embodiments, Figure 2 and Figure 3As shown, the second section 112 includes a first plate 1123, a second plate 1124 and a third plate 1125 which are connected in sequence, the first plate 1123 is located parallel to the top of the third plate 1125, two ends of the second plate 1124 are respectively connected to the first end of the first plate 1123 and the first end of the third plate 1125, the second end of the third plate 1125 is connected to the first end of the second extension portion 12, and the second end of the first plate 1123 is connected to the second end of the second protruding plate 1121; and the third plate 1125 abuts against the terminal board 4, so that the third plate 1125 can provide support for the entire arc-starting component 1. When the arc-starting component 1 is assembled with other parts, the support of the third plate 1125 can avoid large deformation of the arc-starting component 1, thereby ensuring a better assembly size and performance of the arc-starting component 1.

[0070] Specifically, Figure 5 As shown, the arc-striking member 1 is an integrally formed structure, which is convenient for processing the arc-striking member 1 on the one hand, and makes the processing of the arc-striking member 1 simple and convenient; on the other hand, it can ensure the connection reliability between the various structures in the arc-striking member 1. In this embodiment, specifically, the vertical plate, the second horizontal plate 1122, the second protruding plate 1121, the connecting plate 113, the first protruding plate 1114, the first horizontal plate 1112, the bending plate 1113, the arc-striking plate 1111 and the protrusion 116 are an integrally formed structure.

[0071] The arc extinguishing structure in this embodiment increases the setting position of the first section 111 in the first direction by making the second end of the first section 111 higher than the first end, thereby reducing the distance between the first section 111 and the arc extinguishing grid; and, by setting an inclined arc-starting plate 1111, the distance between the first section 111 and the arc extinguishing grid can be further reduced; thereby, the arc-starting ability of the arc-starting member 1 is improved, ensuring that the contactor has a better breaking ability; at the same time, an installation space 115 is formed on the arc-starting member 1, and the static contact 3 can be quickly and easily installed in the installation space 115, making the installation of the static contact 3 relatively simple and quick; and, by setting a first horizontal plate 1112 extending horizontally along the second direction, an escape space can be provided for the moving contact 6, ensuring that the moving contact 6 can smoothly move downward along the first direction to abut against the static contact 3.

[0072] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An arc extinguishing structure, arranged close to the stationary contact (3) and the moving contact (6), characterized in that: include: Arc quenching grid; The arc-striking member (1) comprises a first extension portion (11) and a second extension portion (12), wherein the second extension portion (12) extends along a first direction, the first extension portion (11) comprises a first sub-portion (111) and a second sub-portion (112) which are arranged at intervals and extend respectively along a second direction, the first end of the second sub-portion (112) is connected to the first end of the second extension portion (12), the second end of the second sub-portion (112) is connected to the first end of the first sub-portion (111), the second end of the first sub-portion (111) is connected to the middle portion of the second extension portion (12), the second end of the first sub-portion (111) is arranged higher than the first end, and the arc-extinguishing grid is arranged above the first sub-portion (111).

2. The arc extinguishing structure according to claim 1, characterized in that: The first subsection (111) comprises: An arc-striking plate (1111), wherein the first end of the arc-striking plate (1111) is connected to the second end of the second subsection (112), the second end of the arc-striking plate (1111) is connected to the middle of the second extension portion (12), and the arc-striking plate (1111) is inclined, and the second end of the arc-striking plate (1111) is higher than the first end.

3. The arc extinguishing structure according to claim 1, characterized in that: The first subsection (111) comprises: A first horizontal plate (1112) extending along a second direction, wherein a first end of the first horizontal plate (1112) is connected to a second end of the second subsection (112); A bending plate (1113), wherein the bending plate (1113) is arranged obliquely, and the first end of the bending plate (1113) is arranged lower than the second end, and the first end of the bending plate (1113) is connected to the second end of the first horizontal plate (1112); An arc-starting plate (1111), wherein the first end of the arc-starting plate (1111) is connected to the second end of the bending plate (1113), and the second end of the arc-starting plate (1111) is connected to the middle part of the second extension portion (12).

4. The arc extinguishing structure according to claim 3, characterized in that: The lowest point of the arc-starting plate (1111) in the first direction is 1 mm-10 mm higher than the first horizontal plate (1112).

5. The arc extinguishing structure according to claim 3, characterized in that: The angle between the bent plate (1113) and the first horizontal plate (1112) is 5°-60°.

6. The arc extinguishing structure according to any one of claims 3 to 5, characterized in that: The included angle between the arc-starting plate (1111) and the first horizontal plate (1112) is 2°-45°.

7. The arc extinguishing structure according to any one of claims 3 to 5, characterized in that: The arc-starting plate (1111) is parallel to the first horizontal plate (1112).

8. The arc extinguishing structure according to any one of claims 1 to 5, characterized in that: The arc-starting member (1) further comprises: A connecting member (114), wherein two ends of the connecting member (114) are respectively connected to the second end of the second section (112) and the first end of the first section (111), a plurality of connecting members (114) are connected between the second end of the second section (112) and the first end of the first section (111), and an installation space (115) for installing the static contact (3) is formed between two adjacent connecting members (114).

9. The arc extinguishing structure according to claim 8, characterized in that: The connecting member (114) comprises: A first protruding plate (1114), a connecting plate (113) and a second protruding plate (1121), wherein the first end of the first protruding plate (1114) is connected to the first end of the first section (111), the second end of the first protruding plate (1114) is connected to the first end of the connecting plate (113), the second end of the connecting plate (113) is connected to the first end of the second protruding plate (1121), and the second end of the second protruding plate (1121) is connected to the second end of the second section (112).

10. The arc extinguishing structure according to any one of claims 1 to 5, characterized in that: The second subsection (112) comprises: A second horizontal plate (1122), the second horizontal plate (1122) extends along a second direction, a first end of the second horizontal plate (1122) is connected to a first end of the second extension portion (12), and a second end of the second horizontal plate (1122) is connected to a first end of the first branch portion (111).

11. The arc extinguishing structure according to any one of claims 1 to 5, characterized in that: The second subsection (112) comprises: A first plate (1123), a second plate (1124) and a third plate (1125) are connected in sequence, wherein the first plate (1123) is located parallel to and above the third plate (1125), two ends of the second plate (1124) are respectively connected to the first end of the first plate (1123) and the first end of the third plate (1125), the second end of the third plate (1125) is connected to the first end of the second extension portion (12), and the second end of the first plate (1123) is connected to the first end of the first branch (111).

12. A contactor, characterized in that The contactor comprises an arc extinguishing structure as claimed in any one of claims 1 to 11, and further comprises: Base (2); A stationary contact (3) is located in the base (2), and a first end of the stationary contact (3) is limitedly installed in the arc-starting member (1); A terminal block (4), wherein the terminal block (4) is mounted on the base (2), and the second end of the stationary contact (3) is connected to the terminal block (4).

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