Isolating switch

Abstract

The utility model discloses an isolation switch, and the isolation switch is characterized in that a first switch unit layer is internally provided with a first contact system, and the first contact system comprises a moving contact assembly and at least one group of static contact assemblies; the static contact assembly comprises a static contact blade, a first elastic piece and a second elastic piece; the first elastic piece and the static contact piece are fixed to form a first clamping opening, the second elastic piece and the static contact piece are fixed to form a second clamping opening, and the first clamping opening and the second clamping opening are formed in the two sides of the static contact piece in the first direction respectively. The first movable contact piece and the second movable contact piece are arranged at an interval in the first direction; the first movable contact piece is matched with the first clamping opening, and the second movable contact piece is matched with the second clamping opening. The first movable contact piece and the second movable contact piece are rotationally arranged around the same axis, so that the first movable contact piece and the second movable contact piece form clamping with the first clamping opening and the second clamping opening at the same time or release clamping at the same time after rotating; the current-carrying capacitor has the characteristic of good current-carrying performance.

Description

Technical Field

[0001] This application relates to a disconnecting switch used in a power supply system. Background Technology

[0002] Existing rotary disconnect switches typically use a clamping method to connect their moving and stationary contacts. Most systems employ a structure where two moving contacts clamp the stationary contact, and the clamping force in this structure comes from a spring on the moving contact.

[0003] As those skilled in the art have continued to research and discover, a structure has been designed that adds a spring to the stationary contact, using the stationary contact and the spring to clamp a single moving contact. While this structure solves the aforementioned drawbacks, it also introduces other problems, such as the limited current-carrying capacity of a single moving contact.

[0004] Therefore, how to further improve the contact system in which the stationary contact clamps the moving contact and increase its current carrying capacity is a question worth considering. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide an isolating switch.

[0006] This application provides: a disconnecting switch, comprising at least two layers of switch unit layers stacked in a first direction, wherein at least one layer of switch unit layers is a first switch unit layer, and a first contact system is provided within the first switch unit layer. The first contact system includes a moving contact assembly and at least one set of stationary contact assemblies. The stationary contact assembly includes a stationary contact piece, a first elastic member, and a second elastic member. The first elastic member is fixed to the stationary contact piece to form a first clamping opening, and the second elastic member is fixed to the stationary contact piece to form a second clamping opening. The first clamping opening and the second clamping opening are respectively located on both sides of the stationary contact piece in the first direction. The moving contact assembly includes a first moving contact piece and a second moving contact piece, which are spaced apart in the first direction. The first moving contact piece matches the first clamping opening, and the second moving contact piece matches the second clamping opening. The first moving contact piece and the second moving contact piece are rotatably arranged around the same axis, such that after the first moving contact piece and the second moving contact piece rotate, they simultaneously clamp or simultaneously release clamping with the first clamping opening and the second clamping opening.

[0007] In some embodiments of this application, the switching unit layer further includes at least a second switching unit layer, the number of which is 2-5 times the number of the first switching unit layer, and the current carrying capacity of the second switching unit layer is lower than that of the first switching unit layer.

[0008] In some embodiments of this application, the number of the first switch unit layers is at least two, and the two first switch unit layers are arranged adjacent to each other.

[0009] In some embodiments of this application, the number of the first switch unit layers is at least two, with 2-5 second switch unit layers sandwiched between the two first switch unit layers.

[0010] In some embodiments of this application, the first elastic element is a spring sheet, including a first fixing part, a first bending part, and a first clamping part. The first fixing part is fixed to the stationary contact sheet. The first clamping part and the first fixing part are connected through the first bending part, so that a first clamping opening is formed between the first clamping part and the stationary contact sheet. The second elastic element is a spring sheet, including a second fixing part, a second bending part, and a second clamping part. The second fixing part is fixed to the stationary contact sheet. The second clamping part and the second fixing part are connected through the second bending part, so that a second clamping opening is formed between the second clamping part and the stationary contact sheet.

[0011] In some embodiments of this application, the stationary contact piece includes a contact portion, a connecting portion, and a wiring portion; the first elastic member and the second elastic member are both fixed to the contact portion, and the wiring portion is connected to the contact portion through the connecting portion; the wiring portion is used to connect to an external circuit, and the wiring portion has at least two solder feet or is provided with wiring terminals.

[0012] In some embodiments of this application, the number of stationary contact components in the first contact system is two sets, which correspond to the two ends of the first moving contact piece and the second moving contact piece in the length direction, respectively.

[0013] In some embodiments of this application, the stationary contact assembly in the first contact system is divided into a first stationary contact assembly and a second stationary contact assembly; the first stationary contact assembly includes a first contact portion, a first connecting portion and a first wiring portion, and the first wiring portion is provided with a wiring terminal; the second stationary contact assembly includes a second contact portion, a second connecting portion and a second wiring portion, and the second wiring portion has at least two solder feet; the first wiring portion and the second wiring portion are used to connect the first switch unit layer to an external circuit.

[0014] In some embodiments of this application, two solder feet belonging to the same second wiring portion are spaced apart in a second direction, and the second direction is perpendicular to the stacking direction of the switch unit layer.

[0015] In some embodiments of this application, the first switch unit layer further includes a unit layer housing, which includes a first side wall and a second side wall. The first side wall and the second side wall are two parallel side walls. The first side wall is provided with a mounting groove for placing the first wiring part and the wiring terminal, and the second side wall is provided with a through hole for the solder foot to pass through.

[0016] In some embodiments of this application, the movable contact assembly further includes a gasket disposed between the first movable contact piece and the second movable contact piece, so that the first movable contact piece and the second movable contact piece are spaced apart in a first direction.

[0017] In some embodiments of this application, the moving contact assembly further includes a moving contact disk, on which a moving contact receiving cavity is provided, and the first moving contact piece and the second moving contact piece are both located in the moving contact receiving cavity.

[0018] The advantages of this application compared to the prior art are:

[0019] The above structure forms two clamping openings on each stationary contact, and a moving contact is clamped through each of the two clamping openings. Compared with the existing single moving contact structure, this improves the current carrying capacity. The switching unit layer of this contact system can meet the requirements of higher current carrying capacity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This illustration shows a schematic diagram of an embodiment of the present application where the disconnecting switch has a first switching unit layer and a second switching unit layer;

[0022] Figure 2 This diagram illustrates an embodiment of the present application where the isolating switch exists only in the first switch unit layer;

[0023] Figure 3 This diagram shows a first-axis view of the first switching unit layer of the disconnecting switch according to an embodiment of this application;

[0024] Figure 4 A schematic diagram of the first switching unit layer of the disconnecting switch according to an embodiment of this application is shown from another axial view direction;

[0025] Figure 5 A schematic diagram of the housing of the first switching unit layer of the disconnecting switch according to an embodiment of this application is shown;

[0026] Figure 6 A schematic diagram of the moving contact component and the stationary contact component in the first switching unit layer of the disconnecting switch according to an embodiment of this application is shown;

[0027] Figure 7 An exploded view of the moving contact assembly in the first switching unit layer of the disconnecting switch according to an embodiment of this application is shown;

[0028] Figure 8 A schematic diagram of the first moving contact piece, the gasket, and the second moving contact piece of the moving contact assembly in the first switching unit layer of the disconnecting switch according to an embodiment of this application is shown;

[0029] Figure 9 A schematic diagram of the first stationary contact assembly in the first switching unit layer of the isolating switch according to an embodiment of this application is shown;

[0030] Figure 10 A schematic diagram of the second stationary contact component in the first switching unit layer of the isolating switch according to an embodiment of this application is shown. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0036] like Figure 1-10 As shown, an embodiment of this application is an isolating switch.

[0037] This disconnector includes an operating unit layer 100 and a switching unit layer 200.

[0038] The operating unit layer 100 contains an operating mechanism. The input end of the operating mechanism is connected to a knob, and the output end is connected to a moving contact plate 202 (first-layer switch unit layer 200) within the switch unit layer 200. By manipulating the knob, the moving contact plate 202 within the switch unit layer 200 can be rotated, thereby enabling the disconnection of the isolating switch. The operating mechanism is common knowledge in the field and will not be described in detail here.

[0039] The switch unit layer 200 is stacked sequentially below the operation unit layer 100 along the first direction F1, which is the height direction. The moving contact plates 202 of each switch unit layer 200 are interlocked with each other. The moving contact plates 202 of the first layer of switch unit layers 200 are connected to the output end of the operation mechanism, so that multiple switch unit layers 200 can move simultaneously under the control of the operation mechanism.

[0040] In this embodiment, the switch unit layer 200 is divided into a first switch unit layer 200a and a second switch unit layer 200b. The first switch unit layer 200a has a total of 3 layers, and the second switch unit layer 200b has a total of 9 layers. Three layers of second switch unit layer 200b are sandwiched between every two layers of first switch unit layer 200a. Here, the current-carrying capacity of the first switch unit layer 200a is greater than that of the second switch unit layer 200b. Current-carrying capacity refers to the ability to withstand the flow of current. This structure allows the first switch unit layer 200a to connect a larger number of photovoltaic modules (or photovoltaic modules with higher output current) compared to the second switch unit layer 200b, thus meeting user needs.

[0041] There are several ways to achieve this difference in current-carrying capacity: Scenario 1: The conductive components (moving and stationary contacts) in the first switching unit layer 200a and the second switching unit layer 200b are made of the same material, but the dimensions of the conductive components (moving and stationary contacts) in the first switching unit layer 200a are different from those in the second switching unit layer 200b (for example, the conductor cross-section of the conductive component in the first switching unit layer 200a is larger than that in the second switching unit layer 200b). Scenario 2: The material used for the conductive components (moving and stationary contacts) in the first switching unit layer 200a has better conductivity than the material used for the conductive components (moving and stationary contacts) in the second switching unit layer 200b.

[0042] The second switch unit layer 200b contains two second stationary contact pieces and a second moving contact assembly. The second moving contact assembly includes a second moving contact piece and a second spring piece. The second moving contact piece is riveted to the second spring piece, and the two second stationary contact pieces are clamped together by the second spring piece and the second moving contact piece to achieve the connection of the second switch unit layer 200b.

[0043] In addition, the second moving contact assembly can also consist of two second moving contact pieces and two second springs. The two second stationary contact pieces are clamped by the second moving contact pieces to realize the connection of the second switch unit layer 200b. The second springs are located on both sides of the two second moving contact pieces to increase the clamping force of the second moving contact pieces on the second stationary contact pieces.

[0044] Alternatively, the second moving contact assembly may also have two conductive springs, which clamp the two second stationary contact pieces to achieve the connection of the second switching unit layer 200b.

[0045] Alternatively, a second spring is riveted or welded onto the second stationary contact piece, and the second moving contact assembly includes a second moving contact piece. The two ends of the second moving contact piece are clamped by two second stationary contact pieces and two second spring pieces to achieve the connection of the second switching unit layer 200b.

[0046] Of course, in addition to the above structure, snap-fit ​​moving and stationary contacts can also be used, as long as they can realize the connection and disconnection of the second switch unit layer 200b.

[0047] Of course, in addition to the above-mentioned spaced arrangement (with the second switch unit layer 200b sandwiched between them), the first switch unit layer 200a can also be arranged adjacently, that is, the first switch unit layer 200a is stacked in sequence and the second switch unit layer 200b is stacked in sequence. This adjacent arrangement is more user-friendly for wiring.

[0048] Here, in addition to using 3 layers, the second switch unit layer 200b can also use 4 or 5 layers. That is, for each additional layer of the first switch unit layer 200a, the number of the second switch unit layers 200b will be 4 or 5.

[0049] Of course, in addition to this, the second switching unit layer 200b can also be omitted. That is to say, all switching unit layers 200 of this disconnecting switch are the first switching unit layer 200a.

[0050] Regardless of whether the solution has a second switch unit layer 200b or not, its first switch unit layer 200a contains a unit layer housing 201, a moving contact component, and a stationary contact component 210.

[0051] The unit layer shell 201 includes a first side wall 201a, a second side wall 201b, a third side wall 201c, a fourth side wall 201d, and a bottom wall 201e. The first side wall 201a, the second side wall 201b, the third side wall 201c, and the fourth side wall 201d surround the bottom wall 201e. The first side wall 201a, the third side wall 201c, the second side wall 201b, and the fourth side wall 201d are connected end to end in sequence.

[0052] The moving contact assembly includes a moving contact disk 202, a first moving contact piece 203, and a second moving contact piece 204. The moving contact disk 202 is rotatably disposed with respect to the unit layer housing 201, and the moving contact disk 202 rotates along axis O. A moving contact receiving cavity is formed on the moving contact disk 202, and the first moving contact piece 203 and the second moving contact piece 204 are disposed in the moving contact receiving cavity. The two ends of the first moving contact piece 203 and the second moving contact piece 204 extend out of the moving contact receiving cavity and cooperate with the stationary contact assembly 210.

[0053] Here, the first movable contact 203 and the second movable contact 204 are spaced apart, specifically in the first direction F1, which is parallel to the axis O. The spacer 205 separates the first movable contact 203 and the second movable contact 204. This spacer 205 simplifies the spacer arrangement between them and facilitates assembly.

[0054] The stationary contact assembly 210 consists of two sets, including a stationary contact piece, a first elastic element 212, and a second elastic element 213. The first elastic element 212 is fixed to the stationary contact piece and forms a first clamping opening 214, and the second elastic element 213 is fixed to the stationary contact piece and forms a second clamping opening 215. The first clamping opening 214 and the second clamping opening 215 are respectively located on both sides of the stationary contact piece in the first direction F1.

[0055] As the moving contact plate 202 rotates in one direction, both ends of the first moving contact piece 203 can simultaneously enter the two first clamping ports 214 to form a clamp, and at the same time, both ends of the second moving contact piece 204 can simultaneously enter the two second clamping ports 215 to form a clamp, thereby realizing the connection of the first switch unit layer 200a.

[0056] Conversely, as the moving contact plate 202 rotates in the opposite direction, both ends of the first moving contact piece 203 can simultaneously disengage from the two first clamping ports 214 to release clamping, and at the same time, both ends of the second moving contact piece 204 can simultaneously disengage from the two second clamping ports 215 to release clamping, thereby achieving the breaking of the first switching unit layer 200a. This structure, within the framework of the stationary contact clamping the moving contact, increases the number of moving contact pieces and increases the current-carrying capacity.

[0057] For the first elastic element 212 and the second elastic element 213, spring sheets can be used. The first elastic element 212 includes a first fixing part 2121, a first bending part 2122, and a first clamping part 2123. The first fixing part 2121 is fixed to the stationary contact piece, and the first clamping part 2123 is connected to the first fixing part 2121 through the first bending part 2122, so that a first clamping opening 214 is formed between the first clamping part 2123 and the stationary contact piece. The fixing here is riveting, but welding or screw fastening can also be used. Similarly, the second elastic element 213 includes a second fixing part 2131, a second bending part 2132, and a second clamping part 2133. The connection method is similar to that of the first elastic element 212, and will not be described again here.

[0058] The first elastic element 212 and the second elastic element 213 of such a spring sheet have a relatively simple structure, which is conducive to fixing it with the stationary contact sheet to form the first clamping opening 214 and the second clamping opening 215.

[0059] Both sets of stationary contact assemblies 210 include a contact portion, a connecting portion, and a wiring portion. Their corresponding first elastic element 212 and second elastic element 213 are fixed to the contact portion. The wiring portion is used to connect to external circuits. The wiring portion has at least two solder feet or at least two wiring terminals 2104.

[0060] This static contact sheet structure design is more reasonable, which is not only conducive to the assembly of the first elastic element 212 and the second elastic element 213 to achieve cooperation with the moving contact sheet, but also facilitates connection to the circuit.

[0061] The stationary contact tips of the two sets of stationary contact components 210 have different shapes. To distinguish the two sets of stationary contact components 210, they are referred to as the first stationary contact component 210a and the second stationary contact component 210b:

[0062] The stationary contact piece of the first stationary contact assembly 210a includes a first contact portion 2101, a first connecting portion 2102, and a first wiring portion 2103. The first wiring portion 2103 is provided with two wiring terminals 2104.

[0063] The first contact portion 2101 is perpendicular to the first wiring portion 2103 and is connected through the first connecting portion 2102.

[0064] Two terminals 2104 are provided on the first wiring section 2103. The two terminals 2104 are arranged along the second direction F2, and the arrangement direction of the terminals 2104 is perpendicular to the first direction F1.

[0065] A mounting groove 201a1 is provided on the first side wall 201a for placing the first wiring part 2103 and the wiring terminal 2104. The nuts and screws of the first wiring part 2103 and the wiring terminal 2104 are located in the mounting groove 201a1.

[0066] This number of terminals 2104 allows the first stationary contact assembly 210a to be connected to an external circuit.

[0067] The stationary contact piece of the second stationary contact assembly 210b includes a second contact portion 2105, a second connecting portion 2106, and a second wiring portion 2107.

[0068] The second wiring section 2107 here has two solder feet, which are used to solder to the external circuit board, thereby facilitating the connection of the second static contact assembly 210b into the circuit.

[0069] The solder feet here are arranged along the second direction F2, which is perpendicular to the first direction F1.

[0070] A through hole 201b1, the same number as the number of welding feet, is provided on the second side wall 201b, through which the welding feet can pass out of the unit layer shell 201.

[0071] In addition, the aforementioned solder feet and terminals 2104 can also be used in other quantities, as long as there are at least two.

[0072] Of course, for the stationary contact assembly 210, it can also use only one set. For example, the first stationary contact assembly 210a or the second stationary contact assembly 210b can be omitted, and the same end of the first moving contact piece 203 and the second moving contact piece 204 can be directly soldered with a flexible wire, and then connected to the circuit through the terminal block 2104 or the solder foot.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A disconnecting switch, comprising at least two layers of switch unit layers stacked in a first direction, characterized in that: At least one switching unit layer is a first switching unit layer, and a first contact system is provided in the first switching unit layer. The first contact system includes a moving contact component and at least one set of stationary contact components. The stationary contact assembly includes a stationary contact piece, a first elastic element, and a second elastic element; the first elastic element is fixed to the stationary contact piece and forms a first clamping opening, and the second elastic element is fixed to the stationary contact piece and forms a second clamping opening; the first clamping opening and the second clamping opening are respectively disposed on both sides of the stationary contact piece in a first direction. The movable contact assembly includes a first movable contact piece and a second movable contact piece, which are spaced apart in a first direction; the first movable contact piece matches a first clamping port, and the second movable contact piece matches a second clamping port; the first movable contact piece and the second movable contact piece are rotatably arranged around the same axis, such that after the first movable contact piece and the second movable contact piece rotate, they simultaneously form clamping with the first clamping port and the second clamping port or simultaneously release clamping.

2. The disconnecting switch according to claim 1, characterized in that: The switching unit layer also includes at least a second switching unit layer, the number of which is 2-5 times the number of the first switching unit layer, and the current carrying capacity of the second switching unit layer is lower than that of the first switching unit layer.

3. A disconnecting switch according to claim 2, characterized in that: The number of the first switch unit layers is at least two, and the two first switch unit layers are arranged adjacent to each other. Alternatively, the number of the first switch unit layers is at least two, with 2-5 second switch unit layers sandwiched between the two first switch unit layers.

4. A disconnecting switch according to claim 1, characterized in that: The first elastic element is a spring sheet, including a first fixing part, a first bending part, and a first clamping part. The first fixing part is fixed to the stationary contact sheet. The first clamping part and the first fixing part are connected through the first bending part, so that a first clamping opening is formed between the first clamping part and the stationary contact sheet. The second elastic element is a spring sheet, including a second fixing part, a second bending part, and a second clamping part. The second fixing part is fixed to the stationary contact sheet. The second clamping part and the second fixing part are connected through the second bending part, so that a second clamping opening is formed between the second clamping part and the stationary contact sheet.

5. A disconnecting switch according to claim 1, characterized in that: The stationary contact piece includes a contact portion, a connecting portion, and a wiring portion; both the first elastic element and the second elastic element are fixed to the contact portion, and the wiring portion is connected to the contact portion through the connecting portion; the wiring portion is used to connect to external circuits, and the wiring portion has at least two solder feet or is provided with wiring terminals.

6. A disconnecting switch according to claim 1, characterized in that: The number of stationary contact components in the first contact system is two sets, which correspond to the two ends of the first moving contact piece and the second moving contact piece in the length direction, respectively.

7. A disconnecting switch according to claim 6, characterized in that: The stationary contact assembly within the first contact system is divided into a first stationary contact assembly and a second stationary contact assembly. The first stationary contact assembly includes a first contact portion, a first connecting portion, and a first wiring portion, with a wiring terminal provided on the first wiring portion. The second stationary contact assembly includes a second contact portion, a second connecting portion, and a second wiring portion, with the second wiring portion having at least two solder feet. The first wiring portion and the second wiring portion are used to connect the first switch unit layer to an external circuit.

8. A disconnecting switch according to claim 7, characterized in that: The two solder feet belonging to the same second wiring section are spaced apart in the second direction, which is perpendicular to the stacking direction of the switch unit layer.

9. A disconnecting switch according to claim 7, characterized in that: The first switch unit layer also includes a unit layer housing, which includes a first side wall and a second side wall. The first side wall and the second side wall are two parallel side walls. The first side wall has a mounting groove for placing the first wiring part and the wiring terminal, and the second side wall has a through hole for the soldering foot to pass through.

10. A disconnecting switch according to claim 1, characterized in that: The movable contact assembly further includes a gasket, which is disposed between the first movable contact piece and the second movable contact piece to achieve that the first movable contact piece and the second movable contact piece are spaced apart in the first direction; And / or, the moving contact assembly also includes a moving contact disk, on which a moving contact receiving cavity is provided, and the first moving contact piece and the second moving contact piece are both located in the moving contact receiving cavity.

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