Moving contact assembly and relay

Abstract

The application relates to a moving contact assembly and a relay. The moving contact assembly is applied to the relay and comprises a moving contact and a contact group. The contact group has at least one group, the contact group is arranged on the moving contact, the contact group comprises at least two contact parts which are used for contacting a static contact in the relay, adjacent two contact parts in the same group of the contact group are spaced, and the moving contact can be electrically connected with the static contact through the contact parts when the contact parts contact the static contact. The moving contact assembly has good electrical conduction performance with the static contact, and is beneficial to improving the reliability of the relay.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a moving contact component and a relay. Background Technology

[0002] Relays are important components of new energy vehicles, which are subject to many extreme environmental conditions during operation, such as low and high temperatures. Some relays include moving contacts, stationary contacts, and a housing. The moving contacts are located inside the housing, while part of the stationary contacts is exposed outside the housing, and the other part is located inside the cavity of the housing.

[0003] However, during the manufacturing process of relays using related technologies, foreign objects (such as insulating organic and inorganic materials) may be introduced into the enclosure. In high-temperature environments, these foreign objects remaining inside the enclosure may liquefy or vaporize. In low-temperature environments, these liquefied or vaporized foreign objects may condense on the surface where the moving and stationary contacts meet, forming a condensation layer. When the condensation layer on the surface where the moving and stationary contacts meet is thick, it will block the electrical conduction between the moving and stationary contacts, resulting in low reliability of the relay. Utility Model Content

[0004] Therefore, it is necessary to provide a moving contact component and a relay to address the above problems. The moving contact component has good electrical conductivity with the stationary contact, which is beneficial to improving the reliability of the relay.

[0005] On the one hand, a moving contact component is provided for use in a relay, including:

[0006] Moving contacts; and

[0007] The contact group has at least one set and is disposed on the moving contact. The contact group includes at least two contact portions, each for contacting a stationary contact in the relay. In the same set of contact portions, two adjacent contact portions are spaced apart. When a contact portion contacts the stationary contact, the moving contact can be electrically connected to the stationary contact through the contact portion.

[0008] In one embodiment, both the moving contact and the contact group are disposed inside the housing of the relay. When the temperature inside the housing is a first temperature, liquefied or vaporized foreign matter inside the housing can condense on the contact portion and form a condensation layer. The first temperature is a temperature below 0°C.

[0009] In one embodiment, the temperature inside the cover can switch between a first temperature and a second temperature. When the temperature inside the cover is the second temperature, foreign matter inside the cover can liquefy or vaporize. When the temperature inside the cover is the first temperature, the liquefied or vaporized foreign matter inside the cover can condense on the contact portion and form the condensate layer. The second temperature is 0° or higher.

[0010] In one embodiment, the contact portion includes a contact body and a protective layer. The protective layer is disposed on the outer surface of the contact body. Both the protective layer and the contact body are conductive metals. The metal reactivity of the protective layer is weaker than that of the contact body.

[0011] In one embodiment, the moving contact and the stationary contact are disposed opposite to each other, and each of the contact portions is disposed on the side of the moving contact and the stationary contact opposite to each other.

[0012] In one embodiment, the contact portion protrudes from the movable contact member, and in the same group of contacts, a gap is formed between two adjacent contact portions on the movable contact member.

[0013] In one embodiment, the same moving contact has two sets of contact groups, all the contact portions in the same set of contact groups are used to contact the same stationary contact, and the two sets of contact groups are respectively used to contact the two stationary contacts in the relay one-to-one. The two sets of contact groups are distributed sequentially along a first direction, the first direction being the length direction of the moving contact, and the contact portions in the contact groups are used to contact the corresponding stationary contacts.

[0014] In one embodiment, in the same group of contacts, at least two of the contact portions are spaced apart along the first direction;

[0015] And / or, in the same group of contacts, at least two of the contact portions are spaced apart along a second direction, and the second direction forms an angle with the first direction.

[0016] In one embodiment, the movable contact includes at least two movable contact pieces, which are arranged side by side and spaced apart. Adjacent movable contact pieces are electrically connected, and each movable contact piece has a contact portion on one side.

[0017] In one embodiment, a conductive element is also included, through which two adjacent movable contacts are connected.

[0018] In one embodiment, at least three movable contacts are provided, and all of the movable contacts are connected through the same conductive element;

[0019] Alternatively, at least three movable contacts are provided, and at least two conductive elements are provided. Two adjacent movable contacts form a contact group, and each contact group corresponds to one conductive element. Two movable contacts in the same contact group are connected through their corresponding conductive elements.

[0020] In one embodiment, the conductive element is a rigid element, or the conductive element is a flexible element.

[0021] In one embodiment, a plurality of contact portions are provided on the same movable contact piece, and the contact portions on the same movable contact piece are spaced apart.

[0022] On the other hand, a relay is also provided, including a stationary contact and the aforementioned moving contact assembly, wherein the contact portion in the moving contact assembly is capable of contacting or separating from the stationary contact.

[0023] The aforementioned moving contact assembly has at least two contact portions in a contact group for contacting the stationary contact. Electrical conduction between the moving and stationary contacts is achieved when any one of the contact portions in the same contact group is in direct contact with the stationary contact. Because there are at least two contact portions in the same contact group, liquefied or vaporized foreign matter inside the housing can be dispersed and condensed on different contact portions as much as possible. This prevents the accumulation of condensate on the same contact point between the moving and stationary contacts, reducing the thickness of the condensate layer on the contact portion and lowering the risk of condensate formation. This reduces the probability of condensation on the contact portion, thus reducing the risk of electrical conduction being blocked by the condensation of liquefied or vaporized foreign matter on the contact portion. This allows the relay to operate normally in low-temperature environments, improving the reliability of the relay. Attached Figure Description

[0024] Figure 1 This is a perspective view of a relay in some embodiments of this application.

[0025] Figure 2 for Figure 1 The image shows a partial cross-sectional view of the relay.

[0026] Figure 3 This is a perspective view of the moving touch component in the first embodiment of this application.

[0027] Figure 4 This is a perspective view of the moving contact component in the second embodiment of this application.

[0028] Figure 5 This is a perspective view of the moving touch component in the third embodiment of this application.

[0029] Figure 6This is a perspective view of the moving touch component in the fourth embodiment of this application.

[0030] Figure 7 This is a perspective view of the moving contact component in the fifth embodiment of this application.

[0031] Figure 8 This is a perspective view of the moving contact component in the sixth embodiment of this application.

[0032] Figure 9 This is a perspective view of the moving contact component in the seventh embodiment of this application.

[0033] Figure 10 This is a perspective view of the moving contact component in the eighth embodiment of this application.

[0034] Figure 11 This is a perspective view of the moving contact component in the ninth embodiment of this application.

[0035] Figure 12 This is a perspective view of the moving contact component in the tenth embodiment of this application.

[0036] Figure 13 This is a perspective view of the moving contact component in the eleventh embodiment of this application.

[0037] Figure 14 This is a perspective view of the moving contact component in the twelfth embodiment of this application.

[0038] Figure 15 This is a partial structural diagram of a relay in some other embodiments of this application.

[0039] Figure 16 for Figure 15 The diagram shows a partial exploded view of the relay.

[0040] Figure 17 for Figure 15 A partial top view of the relay shown.

[0041] In the picture:

[0042] 100. Stationary contact; 200. Moving contact assembly; 300. Housing; 400. Magnetic circuit assembly;

[0043] 1. Contact group; 11. Contact part; 2. Moving contact; 21. Moving contact piece; 3. Gap part; 4. Conductive component. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] See Figure 1 , Figure 1 A perspective view of a relay according to an embodiment of this application is shown; Figure 2 for Figure 1 The diagram shows a partial cross-sectional view of the relay. An embodiment of this application provides a relay including a stationary contact 100, a housing 300, a moving contact assembly 200, and a magnetic circuit assembly 400. One end of the stationary contact 100 is disposed outside the housing 300, and the other end extends into the housing 300. The moving contact assembly 200 is movably disposed inside the housing 300. A portion of the magnetic circuit assembly 400 is disposed inside the housing 300, and another portion is disposed outside the housing 300. The magnetic circuit assembly 400 is connected to the moving contact 200 and is used to drive the moving contact assembly 200 to move towards or away from the stationary contact 100. When the moving contact assembly 200 moves towards the stationary contact 100, it can contact the stationary contact 100; when the moving contact assembly 200 moves away from the stationary contact 100, it can separate from the stationary contact 100.

[0051] Understandably, in some existing relays, to ensure stable and good contact between the moving contact component 200 and the stationary contact 100, the moving contact component 200 is silver-plated. This involves plating silver at the contact points between the moving contact component 200 and the stationary contact 100, thus forming a silver plating layer at the contact area 11. However, the silver plating process can introduce foreign matter with insulation or conductivity lower than silver. This foreign matter includes organic and / or inorganic substances. Organic contaminants can be additives (such as brighteners, leveling agents, wetting agents, etc.) or decomposition products of additives (organic byproducts generated during the incomplete decomposition of additives on the electrodes during electroplating, or grease and dust remaining on the silver plating layer in the operating environment, or cleaning agent residues remaining on the silver plating layer during cleaning, etc.). Inorganic contaminants can be impurity ions in the cleaning water during the silver plating process, or impurities from impure chemicals or anode materials (silver plates). Foreign matter introduced during the silver plating process will liquefy or vaporize at high temperatures, and at low temperatures, the liquefied or vaporized foreign matter will condense and accumulate at the contact point between the moving contact component 200 and the stationary contact 100, causing the moving contact component 200 to fail to achieve good electrical conduction with the stationary contact 100, thus affecting the normal use of the relay.

[0052] In response to the issues pointed out above, and in combination with Figure 3 The moving contact assembly 200 of this application includes a moving contact 2 and a contact group 1. The contact group 1 has at least one set and is disposed on the moving contact 2. The contact group 1 includes at least two contact portions 11, each for contacting the same stationary contact 100 in the relay. In the same contact group 1, adjacent contact portions 11 are spaced apart, and the contact portions 11 can contact or separate from the stationary contact 100. When the contact portion 11 contacts the stationary contact 100, the moving contact 2 can be electrically connected to the stationary contact 100 through the contact portion 11.

[0053] In a set of contact groups 1, at least two contact portions 11 are provided for contacting the stationary contact 100. When any contact portion 11 in the same set of contact groups 1 is in direct contact with the stationary contact 100, electrical conduction between the moving contact 2 and the stationary contact 100 can be achieved. Since there are at least two contact portions 11 in the same contact group 1, liquefied or vaporized foreign matter inside the housing 300 can be dispersed and condensed on different contact portions 11 as much as possible, preventing the accumulation of condensate layer on the same part where the moving contact assembly 200 and the stationary contact 100 are in contact. This helps to reduce the thickness of the condensate layer on the contact portion 11 and reduce the risk of condensate layer formation on the contact portion 11, thereby reducing the probability of condensate layer formation on the contact portion 11. This helps to reduce the risk of the moving contact assembly 200 and the stationary contact 100 being blocked by the condensation of liquefied or vaporized foreign matter on the contact portion 11, enabling the relay to operate normally in low-temperature environments and improving the reliability of the relay.

[0054] When the relay has a housing 300, the moving contact 2 and the contact group 1 are both located inside the housing 300. When the temperature inside the housing 300 is a first temperature, liquefied or vaporized foreign matter inside the housing 300 can condense on the contact portion 11 and form a condensation layer. The first temperature is a temperature below 0°, i.e., the first temperature < 0°.

[0055] When the relay is used in a high-temperature and low-temperature cyclic environment, the temperature inside the housing 300 can switch between a first temperature and a second temperature. When the temperature inside the housing 300 is the second temperature, foreign matter inside the housing 300 can liquefy or vaporize. When the temperature inside the housing 300 is the first temperature, the liquefied or vaporized foreign matter inside the housing 300 can condense on the contact portion 11 and form a condensation layer. The second temperature is 0°C or higher.

[0056] It should be noted that the foreign matter in this application refers to organic or inorganic matter, or organic and inorganic matter, or a combination of organic and inorganic matter, that is inside the cover 300 and can be liquefied or vaporized at the second temperature or condensed at the first temperature, and has an insulating or conductive property less than that of silver.

[0057] The contact portion 11 includes a contact body and a protective layer. The protective layer is disposed on the outer surface of the contact body. Both the protective layer and the contact body are conductive metals, but the metal reactivity of the protective layer is weaker than that of the contact body. Because the protective layer is less reactive than the contact body, it is less likely to react with oxygen, water vapor, and various acids and alkalis in the air, exhibiting better stability and preventing oxidation or corrosion of the contact body. In this example, the conductivity of the protective layer is greater than that of the contact body, thus ensuring good conductivity between the moving contact 2 and the stationary contact 100 and reducing contact resistance. Since the moving contact 2 has at least two contact portions 11, the risk of foreign matter accumulating on the same contact portion 11 and preventing electrical conduction between the moving contact 2 and the stationary contact 100 is effectively reduced in the event of foreign matter precipitation in the protective layer.

[0058] In this example, the protective layer is formed on the outer surface of the contact subject using an electroplating process. Of course, in actual implementation, other processes can also be used to form the protective layer on the outer surface of the contact subject; no specific limitations are imposed on the process used for the protective layer.

[0059] In one example, the moving contact 2 and the contact body are made of copper, and the protective layer is made of silver. It should be noted that "copper" in this specification is a broad concept, and copper can be pure copper or a copper alloy based on copper; similarly, "silver" in this specification is a broad concept, and silver can be pure silver or a silver alloy based on silver.

[0060] Of course, in other examples, the moving contact 2 and the contact body can be made of other materials, and the protective layer can also be made of other materials. There are no specific restrictions on the materials of the moving contact 2, the contact body and the protective layer.

[0061] It should be noted that in actual implementation, the conductivity of the protective layer can be set to be equal to or slightly less than the conductivity of the contact body.

[0062] In some embodiments, combined with Figure 2 and Figure 3 The moving contact 2 and the stationary contact 100 are arranged opposite to each other, and each contact portion 11 is arranged on the side opposite to the moving contact 2 and the stationary contact 100. It can be understood that the part of the stationary contact 100 that contacts the moving contact 2 is usually a plane. Arranging each contact portion 11 on the side opposite to the moving contact 2 and the stationary contact 100 facilitates contact between each contact portion 11 and the stationary contact 100.

[0063] The contact portion 11 protrudes from the moving contact 2. In the same group of contact groups 1, a gap portion 3 is formed between two adjacent contact portions 11 on the moving contact 2. This design makes two adjacent contact portions 11 in the same group of contact groups 1 spaced apart.

[0064] In order to prevent the peripheral edge of the contact portion 11 from having sharp corners that could scratch the stationary contact 100, in this example, the peripheral edge of the contact portion 11 is provided with rounded corners.

[0065] In some embodiments, combined with Figure 2 and Figure 3 The relay has two stationary contacts 100, which are spaced apart. The two ends of the moving contact assembly 200 can respectively contact or separate from the two stationary contacts 100 in a one-to-one correspondence. For this type of relay, the same moving contact 2 has two sets of contact groups 1, and all contact portions 11 in the same set of contact groups 1 are used to contact the same stationary contact 100. The two sets of contact groups 1 are respectively used to contact the two stationary contacts 100 in the relay in a one-to-one correspondence. The two sets of contact groups 1 are distributed sequentially along a first direction, which is the length direction of the moving contact 2. In this embodiment, the length of the moving contact 2 is the direction indicated by the Y arrow in the figure. By distributing the two stationary contacts 100 of the relay spaced apart along the length direction of the moving contact 2 and providing two sets of contact groups 1 on the moving contact 2, and the two sets of contact groups 1 being distributed sequentially along the length direction of the moving contact 2, both sets of contact groups 1 can contact their corresponding stationary contacts 100.

[0066] In one example, see Figure 3 , Figure 4 and Figure 5In the same group of contact groups 1, at least two contact parts 11 are distributed at intervals along the length direction of the moving contact 2, so that the space in the length direction of the moving contact 2 can be fully utilized to arrange each contact part 11 in the contact group 1.

[0067] See another example. Figure 9 , Figure 10 and Figure 11 In the same contact group 1, at least two contact portions 11 are spaced apart along a second direction, and the second direction forms an angle with the first direction. In this example, the first direction is the length direction of the movable contact 2, i.e., the direction indicated by the Y arrow in the figure; the second direction is the width direction of the movable contact 2, i.e., the direction indicated by the X arrow in the figure. By spaced apart at least two contact portions 11 in the contact group 1 along the width direction of the movable contact 2, the space in the width direction of the movable contact 2 can be fully utilized to arrange each contact portion 11 in the contact group 1.

[0068] In another example, see Figure 11 , Figure 12 , Figure 13 and Figure 14 In the case where contact group 1 has four or more contact portions 11, at least two contact portions 11 in the same contact group 1 are spaced apart along a first direction, and at least two contact portions 11 in the same contact group 1 are spaced apart along a second direction, the second direction forming an angle with the first direction. In this example, the first direction is the length direction of the movable contact 2, i.e., the direction indicated by the Y arrow in the figure; the second direction is the width direction of the movable contact 2, i.e., the direction indicated by the X arrow in the figure. This design allows for the arrangement of as many contact portions 11 as possible on the movable contact 2, enabling more contact portions 11 to be distributed in the limited space on the movable contact 2, reducing the probability of foreign objects accumulating on the same contact portion 11.

[0069] In some embodiments, see Figures 15 to 17 The movable contact 2 includes at least two movable contact pieces 21, which are arranged side by side and spaced apart. Adjacent movable contact pieces 21 are electrically connected, and each movable contact piece 21 is provided with a contact portion 11, so that the side of the movable contact piece 21 facing the stationary contact 100 can be used as the contact portion 11. Since the adjacent movable contact pieces 21 are electrically connected, when the stationary contact 100 contacts each movable contact piece 21, the stationary contact 100 and each movable contact piece 21 form a parallel circuit.

[0070] To facilitate the electrical connection of two adjacent movable contacts 21, the movable contact assembly 200 also includes a conductive element 4, through which the two adjacent movable contacts 21 are connected.

[0071] In this example, at least three movable contacts 21 are provided. In one example, when at least three movable contacts 21 are provided, all movable contacts 21 in the movable contact 2 are connected through the same conductive element 4. In this structure, since all movable contacts 21 are electrically connected through the same conductive element 4, it is beneficial to reduce the processing and assembly steps of the movable contact 2. Furthermore, connecting multiple movable contacts 21 with one conductive element 4 helps prevent uneven force distribution among the movable contacts 21 in the same movable contact 2, which could affect the normal closing and separating of the movable contacts 21 and the stationary contact 100. In this example, the movable contact 2 is provided with three movable contacts 21, which are connected through the same conductive element 4, enabling electrical connection between adjacent movable contacts 21. Of course, in other examples, the number of movable contacts 21 in the movable contact 2 can also be set to two, four, or five, etc.

[0072] In another example, when there are at least three moving contacts 2, there are at least two conductive elements 4. Two adjacent moving contacts 21 form a contact group, and each contact group corresponds to one conductive element 4. The two moving contacts 21 in the same contact group are connected through their corresponding conductive elements 4. With this design, when the connection between some conductive elements 4 and moving contacts 21 fails, the remaining conductive elements 4 can still maintain electrical connection with the moving contacts 21, ensuring that the relay can be used normally.

[0073] In one example, the conductive element 4 is a flexible element. Due to the flexibility of the flexible element, after the flexible element combines the moving contact pieces 21 together, adjacent moving contact pieces 21 can move relative to each other within a certain range. When each moving contact piece 21 contacts the stationary contact piece 100, the moving contact piece 21 can move relative to the stationary contact piece 100 within a certain range, thereby realizing the fine adjustment of the moving contact piece 21 and ensuring that each moving contact piece 2 can make contact with the stationary contact piece 100 in place, thus improving the stability of the contact between the moving contact assembly 200 and the stationary contact piece 100.

[0074] Of course, in other examples, the conductive element 4 is also set to be rigid.

[0075] In actual implementation, multiple contact portions 11 can be provided on the same moving contact piece 21 as needed, and the contact portions 11 on the same moving contact piece 21 are spaced apart. In this way, when the stationary contact 100 contacts the moving contact piece 21, multiple contact points can be formed between the stationary contact 100 and the same moving contact piece 21. Even if foreign matter condenses on some contact portions 11 on the moving contact piece 21, causing the contact portion 11 to be unable to connect the moving contact piece 21 and the stationary contact 100, the moving contact piece 21 can still connect the stationary contact 100 through the remaining contact portions 11, further improving the electrical conductivity performance between the moving contact 2 and the stationary contact 100.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A moving contact component, used in a relay, characterized in that, include: Moving contact; and The contact group has at least one set and is disposed on the moving contact. The contact group includes at least two contact portions, each for contacting a stationary contact in the relay. In the same set of contact portions, two adjacent contact portions are spaced apart. When a contact portion contacts the stationary contact, the moving contact can be electrically connected to the stationary contact through the contact portion.

2. The moving contact component according to claim 1, characterized in that, Both the moving contact and the contact group are used to be disposed inside the housing of the relay. When the temperature inside the housing is a first temperature, liquefied or vaporized foreign matter inside the housing can condense on the contact portion and form a condensation layer. The first temperature is a temperature below 0°C.

3. The moving contact component according to claim 2, characterized in that, The temperature inside the cover can switch between a first temperature and a second temperature. When the temperature inside the cover is the second temperature, the foreign matter inside the cover can liquefy or vaporize. When the temperature inside the cover is the first temperature, the liquefied or vaporized foreign matter inside the cover can condense on the contact part and form the condensate layer. The second temperature is 0° or above.

4. The moving contact assembly according to claim 1, characterized in that, The contact portion includes a contact body and a protective layer. The protective layer is disposed on the outer surface of the contact body. Both the protective layer and the contact body are conductive metals. The metal reactivity of the protective layer is weaker than that of the contact body.

5. The moving contact assembly according to claim 1, characterized in that, The moving contact and the stationary contact are disposed opposite to each other, and each of the contact portions is disposed on the side of the moving contact and the stationary contact opposite to each other.

6. The moving contact assembly according to claim 1, characterized in that, The contact portion protrudes from the moving contact member, and in the same group of contacts, a gap is formed between two adjacent contact portions on the moving contact member.

7. The moving contact assembly according to claim 1, characterized in that, The same moving contact has two sets of contact groups. All the contact portions in the same set of contact groups are used to contact the same stationary contact. The two sets of contact groups are respectively used to contact the two stationary contacts in the relay one-to-one. The two sets of contact groups are distributed sequentially along a first direction, which is the length direction of the moving contact. The contact portions in the contact groups are used to contact the corresponding stationary contacts.

8. The moving contact assembly according to claim 7, characterized in that, In the same group of contacts, at least two of the contact portions are spaced apart along the first direction; And / or, in the same group of contacts, at least two of the contact portions are spaced apart along a second direction, and the second direction forms an angle with the first direction.

9. The moving contact assembly according to any one of claims 1 to 8, characterized in that, The moving contact includes at least two moving contact pieces, which are arranged side by side and spaced apart. Adjacent moving contact pieces are electrically connected, and each moving contact piece is provided with a contact portion.

10. The moving contact assembly according to claim 9, characterized in that, It also includes a conductive element, through which two adjacent moving contacts are connected.

11. The moving contact assembly according to claim 10, characterized in that, At least three movable contacts are provided, and all of the movable contacts are connected through the same conductive element; Alternatively, at least three movable contacts are provided, and at least two conductive elements are provided. Two adjacent movable contacts form a contact group, and each contact group corresponds to one conductive element. Two movable contacts in the same contact group are connected through their corresponding conductive elements.

12. The moving contact assembly according to claim 10, characterized in that, The conductive component is either a rigid component or a flexible component.

13. The moving contact assembly according to claim 9, characterized in that, At least one of the movable contact pieces is provided with a plurality of contact portions, and the contact portions on the same movable contact piece are spaced apart.

14. A relay, characterized in that, It includes a stationary contact and a moving contact assembly as described in any one of claims 1 to 13, wherein the contact portion in the moving contact assembly is capable of contacting or separating from the stationary contact.

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