Arc extinguishing unit and isolating switch

Abstract

The utility model provides an arc extinguishing unit and an isolating switch, and relates to the technical field of isolating switches. The arc extinguishing unit comprises a shell, a moving contact assembly, a static contact piece and an arc extinguishing chamber. A containing space is formed in the shell, a plurality of exhaust channels communicated with the containing space are formed in the shell, and the exhaust channels are used for exhausting air out of the shell. The moving contact assembly is arranged in the accommodating space; the moving contact assembly is provided with a moving contact piece which is rotatably arranged in the accommodating space, and the rotation center of the moving contact piece is located at the central position of the shell. And the static contact piece is fixedly arranged in the accommodating space, is used for being in contact with the movable contact piece to complete closing, and is also used for being separated from the movable contact piece to complete opening. The arc extinguish chamber is arranged in the accommodating space and covers a rotating path of the end part of the movable contact piece; the arc extinguish chamber at least corresponds to two spaced exhaust channels. The isolating switch provided by the utility model adopts the arc extinguishing unit. The arc extinguishing unit and the isolating switch provided by the utility model can improve the problem that the shell is easily influenced by high-pressure gas to cause deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnectors, and in particular to an arc extinguishing unit and a disconnector. Background Art

[0002] Isolating switch is a kind of switch device mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuit". When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time.

[0003] In the prior art, the design requirements for the outlet direction of the arc extinguishing exhaust hole must take into account the environment around the installation of the disconnector and must not affect the normal operation of other products. However, in the current technology, although the exhaust hole is set to discharge the generated high-pressure gas, there is still the problem that the shell is easily deformed by the high-pressure gas. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the problem in the prior art that the shell is easily deformed due to the influence of high-pressure gas generated when the gate is opened.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The utility model provides an arc extinguishing unit, comprising:

[0007] A shell body, wherein a containing space is provided therein, and a plurality of exhaust passages communicating with the containing space are opened on the shell body, and the exhaust passages are used to exhaust air to the outside of the shell body;

[0008] A moving contact assembly is arranged in the accommodation space; the moving contact assembly has a moving contact piece rotatably arranged in the accommodation space, and the rotation center of the moving contact piece is located at the center position of the housing;

[0009] A stationary contact piece, fixedly disposed in the accommodating space, and used to contact with the moving contact piece to complete the closing of the switch, and also used to separate from the moving contact piece to complete the opening of the switch;

[0010] The arc extinguishing chamber is arranged in the accommodating space and covers the rotation path of the end of the moving contact piece; the arc extinguishing chamber corresponds to at least two spaced exhaust channels.

[0011] The arc extinguishing unit provided by the utility model has the following beneficial effects compared with the prior art:

[0012] When the moving contact and the stationary contact are disconnected and an arc is generated, high-pressure gas is formed in the housing. Since the arc extinguishing chamber corresponds to at least two spaced exhaust channels, the high-pressure gas can be discharged from the exhaust channels at different positions, and the pressure can be released to the housing from different positions, effectively avoiding the impact of the high-pressure gas on the housing and preventing the housing from being deformed under the influence of the high-pressure gas. Based on this, the arc extinguishing unit can improve the problem in the prior art that the housing is easily deformed by the high-pressure gas generated when the switch is disconnected.

[0013] Optionally, two arc extinguishing chambers and two static contacts are provided in the accommodating space; the two arc extinguishing chambers are centrally symmetrically arranged, and the two arc extinguishing chambers are respectively corresponding to the two ends of the moving contact piece; the two static contacts are centrally symmetrically arranged, and the two static contacts are respectively corresponding to the two ends of the moving contact piece to complete closing and opening.

[0014] Optionally, the arc extinguishing chamber comprises a first arc extinguishing portion extending along an arc path and a second arc extinguishing portion extending along a straight path; one end of the first arc extinguishing portion is connected to one end of the second arc extinguishing portion;

[0015] The first arc extinguishing portion corresponds to at least one of the exhaust passages, and an end of the second arc extinguishing portion away from the first arc extinguishing portion corresponds to at least one of the exhaust passages.

[0016] Optionally, the arc extinguishing chamber further includes a static arc striking piece, and the static arc striking piece is connected to the end of the second arc extinguishing portion close to the static contact piece.

[0017] Placing the static arc-striking piece inside the arc-extinguishing chamber can improve space utilization, which is beneficial to the miniaturization of the arc-extinguishing unit and the disconnector.

[0018] Optionally, the exhaust passage includes a first section and a second section, the first section is connected to the accommodating space, the second section is connected to the first section and is led out from the outside of the shell; the second section is perpendicular to the outer side of the shell.

[0019] Setting the channel at one end of the gas outlet of the exhaust channel to be perpendicular to the outer side surface of the shell can facilitate rapid gas discharge, thereby improving the problem that the shell is easily deformed due to the influence of high-pressure gas.

[0020] Optionally, an elastic member is provided at the end of the static contact piece, and the elastic member is used to contact the movable contact piece and realize closing the switch; and when the switch is closed, the elastic member generates elastic deformation.

[0021] The elastic force provided by the elastic member can ensure that the moving contact piece and the stationary contact piece are stably supported, thereby ensuring the stability of the closing operation; in addition, when opening the switch, a pop-up force can also be provided to the moving contact piece, which is beneficial to opening the switch.

[0022] Optionally, the stationary contact has a connection terminal, and the connection terminal is located inside the housing. Thus, the withstand voltage of the disconnector terminal using the arc extinguishing unit can be well protected, so that the disconnector meets the expected electrical clearance and creepage distance.

[0023] A disconnector comprises an operating mechanism and the above-mentioned arc extinguishing unit.

[0024] The isolating switch provided by the utility model adopts the above-mentioned arc extinguishing unit, and the beneficial effects of the isolating switch relative to the prior art are the same as the beneficial effects of the above-mentioned arc extinguishing unit relative to the prior art, which will not be repeated here.

[0025] Optionally, there are multiple arc extinguishing units, and the multiple arc extinguishing units are stacked and arranged, and the central axes of the multiple arc extinguishing units are collinear.

[0026] Since multiple arc extinguishing units are arranged in a stacked manner, the user's need to increase the wiring layer can be well met.

[0027] Optionally, the operating mechanism includes a mechanism body and a rotating handle; the mechanism body has a driving spindle linked to the rotating handle, and the driving spindle and the rotation center axis of the moving contact piece are not colinear.

[0028] By setting the rotation center axes of the driving main shaft and the moving contact piece with different axes, a laying-down setting of the operating mechanism can be realized. On the one hand, it can facilitate the connection of the arc extinguishing unit. On the other hand, it can make the output torque of the driving main shaft larger and reduce the force input by the user through the rotating handle, thereby facilitating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of the isolating switch provided in an embodiment of the present application;

[0031] Figure 2 This is one of the structural schematic diagrams of the arc extinguishing unit provided in the embodiments of the present application;

[0032] Figure 3 This is the second structural schematic diagram of the arc extinguishing unit provided in the embodiment of the present application;

[0033] Figure 4This is the third structural schematic diagram of the arc extinguishing unit provided in the embodiment of the present application.

[0034] Icons: 10-isolating switch; 11-operating mechanism; 110-mechanism body; 120-rotating handle; 12-arc extinguishing unit; 200-housing; 210-accommodating space; 211-installation cavity; 220-exhaust channel; 221-first section; 222-second section; 300-moving contact assembly; 310-moving contact piece; 400-static contact piece; 500-arc extinguishing chamber; 510-first arc extinguishing part; 520-second arc extinguishing part; 530-static arc-starting piece; 540-moving arc-starting piece. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] See also Figure 1 In the embodiment of the present application, a disconnector 10 is provided, which can be used for disconnecting and conducting a circuit. It should be noted that when the disconnector 10 is disconnected, an arc is generated in the disconnector 10, and the arc will generate high-pressure gas in the disconnector 10, thereby affecting the housing 200 in which the arc extinguishing chamber 500 is installed in the disconnector 10, and easily causing the above housing 200 to deform. The disconnector 10 provided in this embodiment can improve the problem in the prior art that the housing 200 is easily affected by the high-pressure gas generated during the disconnection and causes deformation.

[0042] Please refer to Figure 2 and Figure 3 In this embodiment, the disconnector 10 includes an operating mechanism 11 and an arc extinguishing unit 12, and the operating mechanism 11 is linked with the arc extinguishing unit 12. Figure 2 The arc extinguishing unit 12 includes a housing 200, a moving contact assembly 300, a stationary contact piece 400 and an arc extinguishing chamber 500. It should be understood that the arc extinguishing unit 12 is also provided with other conventional parts such as a gas generating piece, a moving arc striking piece 540, and the like. Figure 4 , which will not be described in detail here. An accommodating space 210 is provided in the shell 200, and a plurality of exhaust channels 220 connected to the accommodating space 210 are provided on the shell 200. The exhaust channels 220 are used to exhaust gas to the outside of the shell 200, that is, the arc generated when the switch is opened forms high-pressure gas in the accommodating space 210, and the high-pressure gas can be discharged from the exhaust channels 220. The moving contact assembly 300 is arranged in the accommodating space 210; the moving contact assembly 300 has a moving contact piece 310 rotatably arranged in the accommodating space 210, and the rotation center of the moving contact piece 310 is located at the center of the shell 200. The static contact piece 400 is fixedly arranged in the accommodating space 210, and is used to contact with the moving contact piece 310 to complete the closing, and is also used to separate from the moving contact piece 310 to complete the opening. The arc extinguishing chamber 500 is arranged in the accommodating space 210 and covers the rotation path of the end of the moving contact piece 310; the arc extinguishing chamber 500 corresponds to at least two spaced exhaust passages 220. When the moving contact piece 310 and the stationary contact piece 400 are opened, the generated arc is introduced into the arc extinguishing chamber 500 to extinguish the arc. At the same time, the exhaust passage 220 corresponds to the arc extinguishing chamber 500, which can facilitate the high-pressure gas generated by the arc in the arc extinguishing chamber 500 to be discharged from the exhaust passage 220.

[0043] As described above, when the moving contact piece 310 and the stationary contact piece 400 are opened to generate an arc, high-pressure gas is formed in the housing 200. Since the arc extinguishing chamber 500 corresponds to at least two spaced exhaust channels 220, the high-pressure gas can be discharged from the exhaust channels 220 at different positions, and the pressure can be released from the housing 200 from different positions, effectively avoiding the influence of the high-pressure gas on the housing 200 and avoiding the deformation of the housing 200 under the influence of the high-pressure gas. Based on this, the arc extinguishing unit 12 can improve the problem in the prior art that the housing 200 is easily deformed by the influence of the high-pressure gas generated when the switch is opened.

[0044] It is worth noting that after the arc is formed between the moving contact piece 310 and the stationary contact piece 400, the arc is introduced into the arc extinguishing chamber 500 for arc extinguishing. This means that the arc stays in the arc extinguishing chamber 500 for a long time. Based on this, the exhaust channel 220 is arranged corresponding to the arc extinguishing chamber 500, which can be conducive to the rapid discharge of high-pressure gas.

[0045] In addition, since the arc extinguishing chamber 500 covers the rotation path of the end of the moving contact piece 310, the components in the arc extinguishing unit 12 can be arranged compactly, which is conducive to the rational use of the space in the arc extinguishing unit 12, improves the space utilization rate, and facilitates the miniaturization of the arc extinguishing unit 12 and the disconnector 10 using the arc extinguishing unit 12.

[0046] In this embodiment, two arc extinguishing chambers 500 and two static contact pieces 400 are provided in the accommodating space 210; the two arc extinguishing chambers 500 are centrally symmetrically arranged, and the two arc extinguishing chambers 500 are respectively arranged corresponding to the two ends of the moving contact piece 310; the two static contact pieces 400 are centrally symmetrically arranged, and the two static contact pieces 400 are respectively corresponding to the two ends of the moving contact piece 310 to complete closing and opening.

[0047] The accommodation space 210 can be divided into two installation cavities 211 arranged symmetrically with respect to the center, and the two arc extinguishing chambers 500 are respectively arranged in the two installation cavities 211. Each installation cavity 211 corresponds to at least two exhaust channels 220, and the two exhaust channels 220 are both connected to the corresponding installation cavity 211.

[0048] It should be noted that the two ends of the moving contact piece 310 correspond to the two stationary contact pieces 400 and the two arc extinguishing chambers 500. Taking one end of the moving contact piece 310 as an example, the end contacts the corresponding stationary contact piece 400 when closing the circuit breaker, and at the same time, the other end contacts the other stationary contact piece 400. When the end separates from the corresponding stationary contact piece 400 to open the circuit breaker, the other end of the moving contact piece 310 is also separated from the other stationary contact piece 400. Similarly, when an arc is generated between the end and the corresponding stationary contact piece 400, the arc is introduced into the corresponding arc extinguishing chamber 500 to extinguish the arc.

[0049] Optionally, see Figure 3 and Figure 4 The arc extinguishing chamber 500 includes a first arc extinguishing portion 510 extending along an arc path and a second arc extinguishing portion 520 extending along a straight path; one end of the first arc extinguishing portion 510 is connected to one end of the second arc extinguishing portion 520. The two-stage arc extinguishing structure is used to facilitate the rapid introduction of the arc into the arc extinguishing chamber 500, and at the same time, the arc cutting is completed more effectively, so as to quickly achieve arc extinguishing. In addition, the first arc extinguishing portion 510 corresponds to at least one exhaust channel 220, and the end of the second arc extinguishing portion 520 away from the first arc extinguishing portion 510 corresponds to at least one exhaust channel 220. The two exhaust channels 220 are provided to correspond to the first arc extinguishing portion 510 and the second arc extinguishing portion 520, respectively, which can facilitate the discharge of high-pressure gas in the space corresponding to the first arc extinguishing portion 510 and the space corresponding to the second arc extinguishing portion 520, and prevent the housing 200 from being affected and deformed.

[0050] It should be understood that in other embodiments, the location of the exhaust channel 220 can be adjusted according to actual conditions. For example, one exhaust channel 220 is disposed on a side of the first arc extinguishing portion 510 away from the second arc extinguishing portion 520, and the other exhaust channel 220 is disposed on a side of the second arc extinguishing portion 520 close to the first arc extinguishing portion 510, etc.

[0051] In this embodiment, the arc extinguishing chamber 500 further includes a static arc-striking piece 530, which is connected to the end of the second arc extinguishing portion 520 close to the static contact piece 400. The static arc-striking piece 530 is arranged inside the arc extinguishing chamber 500, which can improve the space utilization rate and is conducive to the miniaturization of the arc extinguishing unit 12 and the disconnector 10. In addition, the dynamic arc-striking piece 540 can be arranged on the side of the first arc extinguishing portion 510 away from the second arc extinguishing portion 520, and the dynamic arc-striking piece 540 can be used to guide the arc generated when the switch is opened into the arc extinguishing chamber 500 to quickly achieve arc extinguishing.

[0052] In addition, in this embodiment, the exhaust channel 220 includes a first section 221 and a second section 222. The first section 221 is connected to the accommodating space 210, and the second section 222 is connected to the first section 221 and is led out from the outside of the shell 200; the second section 222 is perpendicular to the outer side of the shell 200. The channel at one end of the gas outlet of the exhaust channel 220 is set to be perpendicular to the outer side of the shell 200, which can facilitate the rapid discharge of gas, thereby improving the problem that the shell 200 is easily deformed by the high-pressure gas. Figure 3 , Figure 3 The arrow A in the middle indicates the direction of gas discharge.

[0053] In this embodiment, a plurality of exhaust passages 220 corresponding to the same arc extinguishing chamber 500 are led out from the same outer side of the housing 200. Figure 3, the two exhaust channels 220 corresponding to the same arc extinguishing chamber 500 are both led out from the same side, and the exhaust channels 220 of the two arc extinguishing chambers 500 are respectively led out from the left and right sides; and the second section 222 of the exhaust channel 220 is perpendicular to the outer side of the shell 200. It should be understood that in other embodiments, the multiple exhaust channels 220 corresponding to the same arc extinguishing chamber 500 can also be led out from different sides. Figure 3 On the basis of the above, the second section 222 of the exhaust channel 220 is replaced with a vertically arranged channel, so that the second section 222 is led out from the upper and lower sides; at this time, the two exhaust channels 220 corresponding to the same arc extinguishing chamber 500 are respectively led out from the upper and lower sides of the shell 200 (not shown). It should be noted that as long as the second section 222 of the exhaust channel 220 is arranged to be led out from the outer side of the vertical shell 200, it can be conducive to the rapid discharge of gas.

[0054] Of course, in other embodiments, the arrangement of the exhaust passage 220 may be adjusted according to actual conditions.

[0055] In this embodiment, an elastic member (not shown) is provided at the end of the stationary contact piece 400, and the elastic member is used to contact the moving contact piece 310 and realize the closing of the switch; and when the switch is closed, the elastic member generates elastic deformation. The elastic force provided by the elastic member can ensure that the moving contact piece 310 and the stationary contact piece 400 are stably supported, ensuring the stability of the closing of the switch; in addition, when the switch is opened, it can also provide an ejection force to the moving contact piece 310, which is conducive to the opening of the switch.

[0056] In other embodiments, the elastic member may also be omitted.

[0057] In this embodiment, the stationary contact piece 400 has a connection terminal (not shown), which is located inside the housing 200. Thus, the withstand voltage of the terminal of the disconnector 10 using the arc extinguishing unit 12 can be well protected, so that the disconnector 10 meets the expected electrical clearance and creepage distance.

[0058] In the disconnector 10, there are multiple arc extinguishing units 12, which are stacked and have colinear central axes. Since the multiple arc extinguishing units 12 are stacked, the user's need to increase the wiring layer can be well met.

[0059] It is worth noting that the arc extinguishing unit 12 is arranged in a horizontally stacked manner, that is, with the rotation plane of the moving contact piece 310 as a plane, multiple arc extinguishing units 12 are stacked in a direction perpendicular to the rotation plane, thereby facilitating the increase of wiring layers and thus meeting the user's need to increase wiring layers.

[0060] In addition, the operating mechanism 11 includes a mechanism body 110 and a rotating handle 120; the mechanism body 110 has a driving main shaft linked with the rotating handle 120, and the driving main shaft and the rotating center axis of the moving contact piece 310 are not colinear. By setting the driving main shaft and the rotating center axis of the moving contact piece 310 in different axes, the operating mechanism 11 can be set in a laid-down manner, which can facilitate the connection of the arc extinguishing unit 12 on the one hand, and on the other hand, the output torque of the driving main shaft can be increased, thereby reducing the force input by the user through the rotating handle 120, and facilitating operation.

[0061] In summary, in the arc extinguishing unit 12 provided in the embodiment of the present application, when the moving contact piece 310 and the stationary contact piece 400 are opened to generate an arc, a high-pressure gas is formed in the housing 200, and since the arc extinguishing chamber 500 corresponds to at least two spaced exhaust channels 220, the high-pressure gas can be discharged from the exhaust channels 220 at different positions, and the pressure can be released to the housing 200 from different positions, effectively avoiding the influence of the high-pressure gas on the housing 200, and avoiding the deformation of the housing 200 under the influence of the high-pressure gas. Based on this, the arc extinguishing unit 12 can improve the problem in the prior art that the housing 200 is easily deformed by the influence of the high-pressure gas generated when the switch is opened. In the disconnector 10, since the multiple arc extinguishing units 12 are arranged in a stacked manner, the user's need to increase the wiring layer can be well met. Furthermore, by using different axis settings for the rotation center axes of the driving main shaft and the moving contact piece 310, a laying-down type setting of the operating mechanism 11 can be realized. On the one hand, it can facilitate the connection of the arc extinguishing unit 12, and on the other hand, it can make the output torque of the driving main shaft larger and reduce the force input by the user through the rotating handle 120, thereby facilitating operation.

[0062] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An arc extinguishing unit, characterized in that: include: A shell body, wherein a containing space is provided therein, and a plurality of exhaust passages communicating with the containing space are opened on the shell body, and the exhaust passages are used to exhaust air to the outside of the shell body; A moving contact assembly is arranged in the accommodating space; the moving contact assembly has a moving contact piece rotatably arranged in the accommodating space, and the rotation center of the moving contact piece is located at the center position of the housing; A stationary contact piece, fixedly disposed in the accommodating space, and used to contact with the moving contact piece to complete the closing of the switch, and also used to separate from the moving contact piece to complete the opening of the switch; The arc extinguishing chamber is arranged in the accommodating space and covers the rotation path of the end of the moving contact piece; the arc extinguishing chamber corresponds to at least two spaced exhaust channels.

2. The arc extinguishing unit according to claim 1, characterized in that: Two arc extinguishing chambers and two static contacts are provided in the accommodating space; the two arc extinguishing chambers are centrally symmetrically arranged, and the two arc extinguishing chambers are respectively corresponding to the two ends of the moving contact piece; the two static contacts are centrally symmetrically arranged, and the two static contacts are respectively corresponding to the two ends of the moving contact piece to complete closing and opening.

3. The arc extinguishing unit according to claim 2, characterized in that: The arc extinguishing chamber comprises a first arc extinguishing portion extending along an arc path and a second arc extinguishing portion extending along a straight path; one end of the first arc extinguishing portion is connected to one end of the second arc extinguishing portion; The first arc extinguishing portion corresponds to at least one of the exhaust passages, and an end of the second arc extinguishing portion away from the first arc extinguishing portion corresponds to at least one of the exhaust passages.

4. The arc extinguishing unit according to claim 3, characterized in that: The arc extinguishing chamber further comprises a static arc striking piece, and the static arc striking piece is connected to the end of the second arc extinguishing portion close to the static contact piece.

5. The arc extinguishing unit according to claim 1, characterized in that: The exhaust passage includes a first section and a second section, the first section is communicated with the accommodating space, the second section is communicated with the first section and is led out from the outside of the shell; the second section is perpendicular to the outer side surface of the shell.

6. The arc extinguishing unit according to claim 1, characterized in that: An elastic member is provided at the end of the static contact piece, and the elastic member is used to contact with the moving contact piece and realize closing the switch; and when the switch is closed, the elastic member generates elastic deformation.

7. The arc extinguishing unit according to claim 1, characterized in that: The stationary contact piece has a connecting terminal, and the connecting terminal is located inside the housing.

8. An isolating switch, characterized in that: It comprises an operating mechanism and an arc extinguishing unit as claimed in any one of claims 1 to 7.

9. The isolating switch according to claim 8, characterized in that: There are a plurality of arc extinguishing units, and the plurality of arc extinguishing units are stacked and arranged, and central axes of the plurality of arc extinguishing units are collinear.

10. The isolating switch according to claim 8, characterized in that: The operating mechanism comprises a mechanism body and a rotating handle; the mechanism body is provided with a driving spindle linked with the rotating handle, and the driving spindle and the rotation center axis of the moving contact piece are not colinear.

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