relay

Abstract

The application relates to a relay, which comprises a shell, a ceramic cover arranged in the shell, a yoke clip arranged in the shell and at least partially surrounding the periphery of the ceramic cover, a lead-out end arranged in the ceramic cover and extending from the inside of the shell to the outside of the shell, and an insulating pad sleeved on the periphery of the lead-out end and covering the top wall of the ceramic cover, and the insulating pad is press-fitted between the shell and the ceramic cover, the insulating pad is provided with a downwardly-extending flange, the flange extends into the gap between the shell and the ceramic cover and surrounds the periphery of the ceramic cover. In this way, the insulating pad can realize insulation isolation of the lead-out end without glue dispensing treatment between the lead-out end and the ceramic cover, meanwhile, the flange surrounds the periphery of the ceramic cover, the creepage distance between the yoke clip and the lead-out end is increased, the high-low voltage withstand insulation capability between the yoke clip and the lead-out end is improved, and thus the working reliability of the relay is improved.

Description

Technical Field

[0001] This application relates to the field of power electrical appliances technology, and in particular to a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] Currently, in addition to insufficient high-voltage withstand insulation between the leads, relays also suffer from insufficient high and low-voltage withstand insulation between the leads and the yoke clamp. To address these issues, methods such as adhesive application are typically used to enhance the relay's withstand insulation performance. However, during installation, the adhesive application may be damaged due to installation stress, affecting the relay's withstand insulation capability. Utility Model Content

[0004] Therefore, it is necessary to address the problem that the adhesive may be damaged during the installation of relays due to installation stress, which may affect the withstand voltage insulation capability. A better relay can be provided that can achieve insulation isolation of the leads without the need for adhesive application between the leads and the ceramic cover, thereby improving the withstand voltage insulation capability of the relay.

[0005] A relay, comprising:

[0006] shell;

[0007] A ceramic cover is disposed within the outer casing;

[0008] A yoke clamp is disposed in the outer shell and at least partially surrounds the periphery of the ceramic cover;

[0009] The lead-out end is inserted into the ceramic cover and extends from the inside of the housing to the outside of the housing; and

[0010] An insulating pad is fitted around the periphery of the lead-out end and covers the top wall of the ceramic cover, and is press-fitted between the outer shell and the ceramic cover. The insulating pad has a downwardly extending flange that extends into the gap between the outer shell and the ceramic cover and surrounds the periphery of the ceramic cover.

[0011] In one embodiment of this application, the insulating pad is made of an elastic insulating material. The insulating pad includes an insulating body and a flange. The flange surrounds the periphery of the insulating body and extends toward the bottom wall of the outer shell. The flange surrounds the periphery of the ceramic cover at one end near the bottom wall of the outer shell.

[0012] In one embodiment of this application, the position of the end of the flange away from the bottom wall of the outer shell is lower than the position of the end of the yoke clamp close to the bottom wall of the outer shell;

[0013] And / or, the flange is located between the ceramic cover and the yoke clamp;

[0014] And / or, the insulating body and the flange are an integral structure.

[0015] In one embodiment of this application, the relay further includes a permanent magnet disposed between the ceramic cover and the yoke clamp;

[0016] The flange extends downward and abuts against one end of the permanent magnet facing the bottom wall of the outer casing.

[0017] In one embodiment of this application, the insulating pad further includes a first protrusion, which protrudes from the surface of the insulating body away from the ceramic cover and surrounds the periphery of the lead-out end. The first protrusion is able to abut against the bottom wall of the outer shell with an interference fit.

[0018] In one embodiment of this application, the outer shell is provided with an outlet hole for the outlet end to pass through, and the bottom wall of the outer shell is provided with a recessed first mating groove. The first mating groove surrounds the periphery of the outlet hole, and the first protrusion is at least partially installed in the first mating groove and abuts against the inner wall of the first mating groove with interference fit.

[0019] In one embodiment of this application, the insulating pad further includes a second protrusion, which protrudes from the surface of the insulating body facing the ceramic cover and surrounds the periphery of the lead-out end. The second protrusion is able to abut against the top wall of the ceramic cover with an interference fit.

[0020] In one embodiment of this application, the ceramic cover is provided with a fixing hole for the lead-out end to pass through, and the top wall of the ceramic cover is provided with a recessed second mating groove. The second mating groove is at least partially surrounded by the periphery of the fixing hole, and the second protrusion is at least partially installed in the second mating groove and abuts against the inner wall of the second mating groove with interference fit.

[0021] In one embodiment of this application, the relay includes two leads, which are spaced apart and pass through the housing. The insulating pad has two mounting holes and is fitted onto the two leads through the two mounting holes.

[0022] In one embodiment of this application, the insulating pad further includes a third protrusion, which protrudes from the surface of the insulating body away from the ceramic cover and is located between the two leads. The third protrusion is able to press against the bottom wall of the outer shell to insulate and isolate the two leads.

[0023] In one embodiment of this application, the bottom wall of the outer casing is further provided with a recessed third mating groove, the third mating groove is disposed between the two leads, and the third protrusion is at least partially installed in the third mating groove and pressurizes against the inner wall of the third mating groove.

[0024] In one embodiment of this application, the insulating pad further includes a fourth protrusion, which protrudes from the surface of the insulating body facing the ceramic cover and is located between the two leads. The fourth protrusion is capable of interference-fitting the top wall of the ceramic cover.

[0025] In one embodiment of this application, the top wall of the ceramic cover is further provided with a recessed fourth mating groove, the fourth mating groove being located between the two leads, and the fourth protrusion being at least partially installed in the fourth mating groove and interfering with the inner wall of the fourth mating groove.

[0026] In one embodiment of this application, the insulating pad further includes a fifth protrusion, which protrudes from the edge of the insulating body away from the ceramic cover and surrounds the periphery of the insulating body. The fifth protrusion is capable of interference-fitting the top wall of the outer shell.

[0027] In one embodiment of this application, the insulating pad is made of rubber or silicone material;

[0028] And / or, the relay is a high-voltage DC relay.

[0029] By adopting the above technical solution, this application has at least the following technical effects:

[0030] In the relay of this application, an insulating pad is fitted around the periphery of the lead-out terminal and covers the top wall of the ceramic cover. Furthermore, the insulating pad is press-fitted between the housing and the ceramic cover, abutting against the bottom wall of the housing and the top wall of the ceramic cover. This insulating pad provides insulation isolation for the lead-out terminal, eliminating the need for adhesive application at the connection between the lead-out terminal and the ceramic cover, and improving the withstand voltage insulation capability between the lead-out terminals. Simultaneously, the insulating pad has a downwardly extending flange that can extend into the gap between the housing and the ceramic cover and surround the periphery of the ceramic cover, increasing the creepage distance between the yoke clamp and the lead-out terminal, improving the high and low voltage withstand voltage insulation capability between the yoke clamp and the lead-out terminal, thereby enhancing the reliability of the relay operation. Attached Figure Description

[0031] Figure 1 This is an exploded view of a relay according to an embodiment of this application.

[0032] Figure 2 for Figure 1 The image shows a cross-sectional view of the relay.

[0033] Figure 3 for Figure 1 The diagram shows the arrangement of the ceramic cover, leads, and yoke clamp in the relay.

[0034] Figure 4 for Figure 1 The diagram shows the insulating pad in the relay from one perspective.

[0035] Figure 5 for Figure 4 The diagram shows the insulating pad from another perspective.

[0036] Figure 6 for Figure 2 The image shows a magnified view of the relay at point A.

[0037] Figure 7 for Figure 2 The image shows a magnified view of the relay at point B.

[0038] Wherein: 100, relay; 110, housing; 111, lead-out hole; 112, third mating groove; 120, ceramic cover; 121, fixing hole; 122, second mating groove; 123, fourth mating groove; 130, yoke clamp; 140, lead-out end; 150, insulating pad; 151, mounting hole; 152, insulating body; 153, flange; 154, first protrusion; 155, second protrusion; 156, third protrusion; 157, fourth protrusion; 158, fifth protrusion; 160, drive structure; 170, permanent magnet. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Understandably, a relay is an electronic control device that plays a role in automatic adjustment, safety protection, and circuit switching in a circuit. Currently, in addition to insufficient high-voltage withstand insulation between the leads, relays also suffer from insufficient high- and low-voltage withstand insulation between the leads and the yoke clamp. To solve these problems, adhesive application is usually used to enhance the relay's withstand insulation performance. However, during installation, the adhesive application may be damaged due to installation stress, affecting the relay's withstand insulation capability.

[0046] For this purpose, please refer to Figures 1 to 5 This application provides a relay 100. Optionally, the relay 100 may be a high-voltage DC relay. Figure 1 This is an exploded view of a relay 100 according to an embodiment of this application. Figure 2 for Figure 1 The cross-sectional view of relay 100 shown is shown. Figure 3 for Figure 1 The diagram shows the assembly of the ceramic cover 120, the lead-out terminal 140, and the yoke clamp 130 in the relay 100. Figure 4 for Figure 1 The diagram shown is a schematic representation of the insulating pad 150 in the relay 100 from one perspective. Figure 5 for Figure 4 A schematic diagram of the insulating pad 150 shown from another perspective.

[0047] The relay 100 of this application has an insulating pad 150 sleeved around the lead-out terminal 140 and press-fitted between the housing 110 and the ceramic cover 120, abutting against the bottom wall of the housing 110 and the top wall of the ceramic cover 120. In this way, the insulating pad 150 can achieve insulation isolation of the lead-out terminal 140, eliminating the need for adhesive application at the connection between the lead-out terminal 140 and the ceramic cover 120, and improving the withstand voltage insulation capability between the lead-out terminals 140. Simultaneously, the insulating pad 150 also has a downwardly extending flange 153, which can extend into the gap between the housing 110 and the ceramic cover 120 and surround the periphery of the ceramic cover 120, increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, improving the high and low voltage withstand voltage insulation capability between the yoke clamp 130 and the lead-out terminal 140, thereby improving the reliability of the relay 100. The specific structures of the relay 100 in some embodiments are described below.

[0048] See Figures 1 to 6 In one embodiment, the relay 100 includes a housing 110, a ceramic cover 120, a yoke clamp 130, a lead-out terminal 140, and an insulating pad 150. The ceramic cover 120 is disposed within the housing 110. The yoke clamp 130 is disposed within the housing 110 and at least partially surrounds the periphery of the ceramic cover 120. The lead-out terminal 140 is inserted into the ceramic cover 120 and extends from the interior of the housing 110 to the exterior of the housing 110. The insulating pad 150 is fitted around the periphery of the lead-out terminal 140, covers the top wall of the ceramic cover 120, and is interference-fitted between the housing 110 and the ceramic cover 120. The insulating pad 150 has a downwardly extending flange 153 that can surround the periphery of the ceramic cover 120. Figure 6 for Figure 2 A magnified view of the relay 100 at point A.

[0049] The outer casing 110 is the external housing of the relay 100. The components of the relay 100 are housed within the outer casing 110, which protects these internal components and ensures the performance of the relay 100. The ceramic cover 120 is a sealing structure within the relay 100. The ceramic cover 120 is housed within the outer casing 110 and serves as the housing for when the relay 100 closes or opens. The ceramic cover 120 can withstand the high electric field strength of high-voltage DC and prevents leakage current or creepage, ensuring stable operation of the relay 100.

[0050] Lead-out terminal 140 is a lead-out component of relay 100. Lead-out terminal 140 is installed through housing 110 and can extend through housing 110. In this way, lead-out terminal 140 can be connected to a wire via a copper busbar on the outside of relay 100 to connect relay 100 to a circuit, thereby enabling relay 100 to control the circuit's on or off state. Lead-out terminal 140 can also be installed through ceramic cover 120, with part of lead-out terminal 140 located inside ceramic cover 120 and part located outside ceramic cover 120.

[0051] The ceramic cover 120 and the lead-out terminal 140 are installed together in the housing 110. At this time, the portion of the lead-out terminal 140 located outside the ceramic cover 120 can extend through the housing 110. Thus, part of the lead-out terminal 140 is on the outside of the housing 110, and part is located on the inside of the housing 110. The lead-out terminal 140 is connected to a copper busbar or the like on the outside of the housing 110, and the portion of the lead-out terminal 140 inside the housing 110 can contact or separate from the moving contact of the relay 100 (mentioned later), thereby realizing the conduction or disconnection of the relay 100.

[0052] The yoke clip 130 is a component of the relay 100 that performs arc extinguishing function, thereby improving the arc extinguishing capability of the relay 100 and thus improving the reliability of the relay 100. The yoke clip 130 is at least partially located on the periphery of the ceramic cover 120, that is, the ceramic cover 120 is located inside the yoke clip 130. Optionally, the yoke clip 130 is made of a metal material. Further, the yoke clip 130 is made of a soft magnetic material, such as iron, cobalt, nickel, and their alloys.

[0053] To improve the withstand voltage insulation capability of relay 100, the relay 100 of this application further includes an insulating pad 150. The insulating pad 150 is sleeved around the periphery of the lead-out terminal 140 and covers the top wall of the ceramic cover 120. The insulating pad 150 is also press-fitted between the housing 110 and the ceramic cover 120. Thus, the surface of the insulating pad 150 facing the housing 110 can abut against the bottom wall of the housing 110, and the surface of the insulating pad 150 facing the ceramic cover 120 can abut against the top wall of the ceramic cover 120. It is understood that the bottom wall of the housing 110 refers to the lower inner surface of the housing 110, i.e., the surface of the housing 110 opposite to the top of the ceramic cover 120, and the top wall of the ceramic cover 120 refers to the upper surface of the ceramic cover 120, i.e., the surface opposite to the bottom wall of the housing 110.

[0054] The insulating pad 150 serves as an insulating barrier. After the insulating pad 150 abuts against the bottom wall of the housing 110 and the bottom wall of the ceramic cover 120, the insulating pad 150 can achieve a seal between the ceramic cover 120 and the housing 110, thereby insulating the lead-out terminal 140 to solve the problem of withstand voltage insulation and improve the withstand voltage insulation capability of the lead-out terminal 140, thus improving the reliability of the relay 100.

[0055] Furthermore, after using the insulating pad 150 to insulate the lead-out terminal 140 and the ceramic cover 120, there is no need to use glue to insulate the lead-out terminal 140 and the ceramic cover 120. This avoids the problem of poor voltage withstand insulation capability of the relay 100 due to glue damage caused by installation stress during installation, thus improving the voltage withstand insulation capability of the relay 100.

[0056] After the insulating pad 150 abuts against the bottom wall of the housing 110 and the top wall of the ceramic cover 120, the insulating pad 150 can also cover the periphery of the ceramic cover 120 on the side near the bottom wall of the housing 110. Specifically, the insulating pad 150 is provided with a downwardly extending flange 153, which can surround the ceramic cover 120 on the side near the bottom wall of the housing 110.

[0057] That is, the flange 153 has a circular structure, so that the insulating pad 150 has a roughly dome-shaped structure. When the insulating pad 150 is installed on the ceramic cover 120, the insulating pad 150 covers the top wall of the ceramic cover 120, and the flange 153 surrounds the top of the ceramic cover 120, so that the insulating pad 150 can cover the ceramic cover 120 from the top. Figures 1 to 6 As shown, the flange 153 can protect the ceramic cover 120 from the top of the periphery of the ceramic cover 120, thus covering the top of the periphery of the ceramic cover 120.

[0058] Thus, the flange 153 can separate the ceramic cover 120 from the yoke clamp 130 on the periphery of the ceramic cover 120, thereby increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, effectively preventing electrical short circuits and insulation failures, improving the high and low voltage withstand voltage insulation capability between the yoke clamp 130 and the lead-out terminal 140, and improving the reliability of the relay 100.

[0059] In the relay 100 of the above embodiment, the insulating pad 150 is sleeved around the lead-out terminal 140 and is press-fitted between the housing 110 and the ceramic cover 120, abutting against the bottom wall of the housing 110 and the top wall of the ceramic cover 120. In this way, the insulating pad 150 can achieve insulation isolation of the lead-out terminal 140, eliminating the need for adhesive application at the connection between the lead-out terminal 140 and the ceramic cover 120, and improving the withstand voltage insulation capability between the lead-out terminals 140. Simultaneously, the insulating pad 150 also has a downwardly extending flange 153, which can extend into the gap between the housing 110 and the ceramic cover 120 and surround the periphery of the ceramic cover 120, increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, improving the high and low voltage withstand voltage insulation capability between the yoke clamp 130 and the lead-out terminal 140, thereby improving the reliability of the relay 100.

[0060] like Figures 1 to 6As shown, in one embodiment, the lead-out hole 111 penetrates the shell wall of the outer casing 110 to connect the inner and outer sides of the outer casing 110. The portion of the lead-out end 140 located outside the ceramic cover 120 can be installed through the lead-out hole 111 and protrude through the lead-out hole 111, so that the lead-out end 140 is partly outside the outer casing 110 and partly located inside the outer casing 110.

[0061] like Figures 1 to 6 As shown, in one embodiment, the ceramic cover 120 is provided with a through fixing hole 121. The fixing hole 121 is correspondingly provided and communicates with the lead-out hole 111. The lead-out end 140 is installed through the fixing hole 121 and extends from the inside of the outer shell 110 through the lead-out hole 111 to the outside of the outer shell 110. The lead-out end 140 can be installed through the fixing hole 121, so that part of the lead-out end 140 is located inside the ceramic cover 120 and part of it is located outside the ceramic cover 120.

[0062] See Figure 2 In one embodiment, the diameter of the lead-out hole 111 is greater than or equal to the outer diameter of the lead-out end 140. This facilitates the lead-out end 140 being inserted and installed into the lead-out hole 111. In this embodiment, the diameter of the lead-out hole 111 is greater than the outer diameter of the lead-out end 140. That is, after the lead-out end 140 is inserted and installed into the lead-out hole 111, there is a certain gap between the outer wall of the lead-out end 140 and the inner wall of the lead-out hole 111. This facilitates the assembly of the lead-out end 140 with the outer casing 110. Of course, in other embodiments, the diameter of the lead-out hole 111 may also be equal to the outer diameter of the lead-out end 140.

[0063] See Figure 1 and Figure 2 In one embodiment, the relay 100 further includes a moving contact (not shown) and a drive structure 160. The moving contact is movably disposed in the ceramic cover 120 and is disposed opposite to the lead-out terminal 140. The drive structure 160 is disposed in the housing 110 and is located below the ceramic cover 120. The drive structure 160 can drive the moving contact to move toward or away from the lead-out terminal 140 so that the moving contact contacts or separates from the lead-out terminal 140 in the ceramic cover 120.

[0064] The moving contact is a component that mates with the lead-out terminal 140. The moving contact is located below the lead-out terminal 140 along its height direction and can move along the height direction of the lead-out terminal 140. The moving contact can rise or fall along the height direction of the lead-out terminal 140, so that the moving contact can contact or separate from the lead-out terminal 140 to realize the conduction or disconnection of the relay 100, so as to connect the relay 100 to the circuit.

[0065] The drive structure 160 is the power source for the relay 100. The drive structure 160 is located below the ceramic cover 120, and its output end extends into the inner side of the ceramic cover 120 and connects to the moving contact. The drive structure 160 can drive the moving contact to move along the height direction of the lead-out end 140 towards or away from the lead-out end 140, so that the moving contact contacts or separates from the lead-out end 140.

[0066] See Figures 1 to 6 In one embodiment, the insulating pad 150 is made of an elastic insulating material. Thus, when the insulating pad 150 is press-fitted between the housing 110 and the ceramic cover 120, the insulating pad 150 can abut against the bottom wall of the housing 110 and the top wall of the ceramic cover 120, ensuring a seal between the housing 110 and the ceramic cover 120, thereby achieving insulation isolation of the lead-out terminal 140 and improving the withstand voltage insulation capability of the lead-out terminal 140.

[0067] See Figures 1 to 6 In one embodiment, the insulating pad 150 is made of rubber or silicone material. That is, the insulating pad 150 is a rubber pad or a silicone pad. The rubber or silicone material enables the insulating pad 150 to have certain insulating properties. When the insulating pad 150 is pressed between the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can achieve insulation isolation of the lead-out terminal 140, improve the withstand voltage insulation capability of the lead-out terminal 140, and can cover the ceramic cover 120 on all sides to increase the creepage distance and improve the insulation withstand voltage capability of the relay 100.

[0068] See Figures 1 to 6 In one embodiment, the insulating pad 150 further includes an insulating body 152, with a flange 153 surrounding the periphery of the insulating body 152 and extending toward the direction away from the bottom wall of the housing 110. The flange 153 surrounds the periphery of the ceramic cover 120 at one end near the bottom wall of the housing 110. The insulating body 152 is generally flat and corresponds to the bottom wall of the housing 110 and the top wall of the ceramic cover 120.

[0069] After the insulating body 152 is disposed between the housing 110 and the ceramic cover 120, the insulating body 152 can press against the bottom wall of the housing 110 and the top wall of the ceramic cover 120 to achieve a seal between the ceramic cover 120 and the housing 110, thereby insulating and isolating the lead-out terminal 140 to solve the problem of withstand voltage insulation isolation. Moreover, the lead-out terminal 140 and the ceramic cover 120 do not need to be insulated and isolated by dispensing glue, which improves the withstand voltage insulation capability of the relay 100 and thus improves the reliability of the relay 100.

[0070] A flange 153 is disposed on the peripheral edge of the insulating body 152 and protrudes from the end of the insulating body 152 facing the ceramic cover 120. That is, the flange 153 forms a ring around the periphery of the insulating body 152, so that the insulating pad 150 is approximately cover-shaped. When the insulating pad 150 is installed on the ceramic cover 120, the insulating body 152 abuts against the top wall of the ceramic cover 120, and the flange 153 surrounds the top of the periphery of the ceramic cover 120, so that the insulating pad 150 can cover the ceramic cover 120 from the top.

[0071] like Figures 1 to 6 As shown, the flange 153 protects the ceramic cover 120 from the top of its periphery, covering the top of the ceramic cover 120's periphery. Thus, the flange 153 separates the ceramic cover 120 from the yoke clamp 130 on its periphery, increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, effectively preventing electrical short circuits and insulation failure, and improving the high and low voltage withstand insulation capability between the yoke clamp 130 and the lead-out terminal 140. This improves the reliability of the relay 100.

[0072] See Figure 2 and Figure 6 In one embodiment, the position of the end of the flange 153 away from the bottom wall of the outer casing 110 is lower than the position of the end of the yoke clip 130 near the bottom wall of the outer casing 110. Figure 2 and Figure 6 In the direction shown, the bottom position of the flange 153 is lower than the top position of the yoke clamp 130, that is, the flange 153 and the yoke clamp 130 are partially overlapped. In this way, the flange 153 can cover the top of the periphery of the ceramic cover 120 to increase the creepage distance between the yoke clamp 130 and the lead-out terminal 140.

[0073] See Figures 1 to 6 In one embodiment, the flange 153 is located between the ceramic cover 120 and the yoke clamp 130. That is, the bottom of the flange 153 extends between the outer wall of the ceramic cover 120 and the inner wall of the yoke clamp 130. In this way, the flange 153 can separate the ceramic cover 120 and the yoke clamp 130 at the top position of the yoke clamp 130, thereby increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140.

[0074] In one embodiment, the insulating body 152 and the flange 153 are an integral structure. That is, the insulating body 152 and the flange 153 can be integrally molded. This reduces the number of parts in the insulating pad 150, and the insulating body 152 and the flange 153 do not need to be assembled, which facilitates the assembly of the insulating pad 150 and the ceramic cover 120.

[0075] See Figure 2 and Figure 6In one embodiment, the relay 100 further includes a permanent magnet 170 disposed between the ceramic cover 120 and the yoke clamp 130. A flange 153 extends downward and abuts against one end of the permanent magnet 170 facing the bottom wall of the outer casing 110. The permanent magnet 170 is located between the outer wall of the ceramic cover 120 and the inner wall of the yoke clamp 130, and fits snugly against both.

[0076] The permanent magnet 170 generates a magnetic field around the moving contact and the lead-out terminal 140. Through the action of the magnetic field, the electric arc generated between the moving contact and the lead-out terminal 140 is elongated in a direction away from each other, thus extinguishing the arc. After the permanent magnet 170 is placed inside the yoke clamp 130, the yoke clamp 130 can prevent the magnetic field of the permanent magnet 170 from spreading outward and affecting the arc extinguishing effect.

[0077] In this application, the flange 153 is located between the ceramic cover 120 and the yoke clamp 130, and extends above the permanent magnet 170. In this way, the flange 153 can cover the top of the periphery of the ceramic cover 120 to separate the ceramic cover 120 and the yoke clamp 130 at the top position of the yoke clamp 130, thereby increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140.

[0078] See Figures 1 to 3 In one embodiment, the relay 100 includes two leads 140, which are spaced apart and pass through the housing 110. The insulating pad 150 is provided with two mounting holes 151 and is fitted onto the two leads 140 through the two mounting holes 151. The housing 110 is provided with two leads 111, and each lead 140 extends through one lead 111. The ceramic cover 120 is provided with two fixing holes 121, and each lead 140 is installed through one fixing hole 121.

[0079] The insulating pad 150 is fitted onto the two leads 140 and presses against the bottom wall of the housing 110 and the top wall of the ceramic cover 120 to achieve insulation isolation between the two leads 140, improve the high voltage withstand insulation capability between the two leads 140, thereby improving the withstand voltage insulation capability of the relay 100 and ensuring the reliability of the relay 100 operation.

[0080] When the driving structure 160 drives the moving contact to rise in the height direction, the moving contact can simultaneously contact both leads 140 to form a conductive path. When the driving structure 160 drives the moving contact to descend in the height direction, the moving contact can simultaneously separate from both leads 140 to form an open circuit. Moreover, the contact or separation of the moving contact with the two leads 140 can increase the current carrying capacity of the relay 100 and improve the reliability of the relay 100.

[0081] See Figures 1 to 7In one embodiment, the insulating pad 150 further includes a first protrusion 154, which protrudes from the surface of the insulating body 152 away from the ceramic cover 120 and surrounds the periphery of the lead-out end 140. The first protrusion 154 can abut against the bottom wall of the outer shell 110 with an interference fit. Figure 7 for Figure 2 A magnified view of the relay 100 at point B.

[0082] The first protrusion 154 is a raised rib on the upper surface of the insulating body 152 and is integrally formed with the insulating body 152. The first protrusion 154 protrudes from the upper surface of the insulating body 152 and is arranged in a circular shape on the upper surface of the insulating body 152, such as... Figure 4 As shown, it is arranged around the mounting hole 151.

[0083] After the insulating pad 150 is pressed against the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can abut against the bottom wall of the housing 110 with an interference fit through the first protrusion 154. In this way, the bottom wall of the housing 110 can compress the first protrusion 154 to achieve insulation isolation of the lead 140, improve the withstand voltage insulation capability of the lead 140, and thus improve the reliability of the relay 100.

[0084] In this embodiment, the insulating pad 150 is provided with two first protrusions 154, each of which surrounds the periphery of the corresponding mounting hole 151. When the lead-out end 140 passes through the fixing hole 121, the mounting hole 151 and the lead-out hole 111, the first protrusion 154 can surround the periphery of the lead-out end 140.

[0085] In this way, the two first protrusions 154 can simultaneously press against the top wall of the housing 110 to achieve insulation isolation between the two leads 140 in the housing 110, further increasing the insulation path between the two leads 140, improving the high voltage withstand insulation capability between the two leads 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0086] See Figures 1 to 7 In one embodiment, the bottom wall of the outer casing 110 is provided with a recessed first mating groove (not shown), the first mating groove surrounds the periphery of the outlet hole 111, and the first protrusion 154 is at least partially installed in the first mating groove and abuts against the inner wall of the first mating groove with interference fit.

[0087] The first mating groove is recessed in the bottom wall of the outer casing 110, and surrounds the periphery of the lead-out hole 111, corresponding to the first protrusion 154. After the insulating pad 150 is pressed between the ceramic cover 120 and the outer casing 110 with an interference fit, the first protrusion 154 can be at least partially installed in the first mating groove.

[0088] At this time, the first protrusion 154 can press against the inner wall of the first mating groove so that the first protrusion 154 is press-fitted into the first mating groove, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0089] Of course, in other embodiments, the bottom wall of the housing 110 may not have the first mating groove. After the insulating pad 150 is pressed between the ceramic cover 120 and the housing 110 with an interference fit, the first protrusion 154 can directly abut against the bottom wall of the housing 110 with an interference fit, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0090] See Figures 1 to 7 In one embodiment, the insulating pad 150 further includes a second protrusion 155, which protrudes from the surface of the insulating body 152 facing the ceramic cover 120 and surrounds the periphery of the lead-out end 140. The second protrusion 155 can abut against the top wall of the ceramic cover 120 with an interference fit.

[0091] The second protrusion 155 is a raised rib on the lower surface of the insulating body 152 and is integrally formed with the insulating body 152. The second protrusion 155 protrudes from the lower surface of the insulating body 152 and is arranged in a circular shape on the lower surface of the insulating body 152, such as... Figure 5 As shown, it is arranged around the mounting hole 151.

[0092] After the insulating pad 150 is pressed against the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can abut against the top wall of the ceramic cover 120 with an interference fit through the second protrusion 155. In this way, the top wall of the ceramic cover 120 can compress the second protrusion 155, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, thus improving the withstand voltage insulation capability of the relay 100, and thereby improving the reliability of the relay 100.

[0093] In this embodiment, the insulating pad 150 is provided with two second protrusions 155, each second protrusion 155 surrounding the periphery of the corresponding mounting hole 151. When the lead-out end 140 passes through the fixing hole 121, the mounting hole 151 and the lead-out hole 111, the second protrusion 155 can surround the periphery of the lead-out end 140.

[0094] In this way, the two second protrusions 155 can simultaneously press against the top wall of the ceramic cover 120 to achieve insulation isolation between the two leads 140 in the housing 110, further increasing the insulation path between the two leads 140 and improving the high voltage withstand insulation capability between the two leads 140, thereby improving the withstand voltage insulation capability of the relay 100.

[0095] See Figures 1 to 7 In one embodiment, the top wall of the ceramic cover 120 is provided with a recessed second mating groove 122. The second mating groove 122 is at least partially surrounded by the periphery of the fixing hole 121. The second protrusion 155 is at least partially installed in the second mating groove 122 and abuts against the inner wall of the second mating groove 122 with interference fit.

[0096] The second mating groove 122 is recessed in the top wall of the ceramic cover 120, and surrounds the periphery of the fixing hole 121, corresponding to the second protrusion 155. The engagement of the second protrusion 155 with the second mating groove 122 enables the positioning of the insulating pad 150 and the ceramic cover 120, facilitating the installation of the insulating pad 150 and preventing movement of the insulating pad 150 relative to the ceramic cover 120, thus ensuring that the insulating pad 150 is accurately installed on the top of the ceramic cover 120.

[0097] After the insulating pad 150 is disposed on the top of the ceramic cover 120, the second protrusion 155 can be at least partially installed in the second mating groove 122. At this time, the second protrusion 155 can press against the inner wall of the second mating groove 122 so that the second protrusion 155 is press-fitted into the second mating groove 122, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0098] Of course, in other embodiments, the top wall of the ceramic cover 120 may not have the second mating groove 122. After the insulating pad 150 is pressed between the ceramic cover 120 and the outer shell 110 with an interference fit, the second protrusion 155 can directly abut against the top wall of the ceramic cover 120 with an interference fit, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0099] See Figures 1 to 7 In one embodiment, the insulating pad 150 further includes a third protrusion 156, which protrudes from the surface of the insulating body 152 away from the ceramic cover 120 and is located between the two leads 140. The third protrusion 156 can press against the bottom wall of the housing 110 to insulate and isolate the two leads 140.

[0100] The third protrusion 156 is a raised rib on the upper surface of the insulating body 152 and is integrally formed with the insulating body 152. The third protrusion 156 protrudes from the upper surface of the insulating body 152 and is arranged in a strip-like structure on the upper surface of the insulating body 152, such as... Figure 4 As shown, the third protrusion 156 is located between the two mounting holes 151 and along... Figure 4 The width shown extends to the edge of the insulating body 152.

[0101] After the insulating pad 150 is pressed against the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can abut against the bottom wall of the housing 110 with an interference fit through the third protrusion 156. In this way, the bottom wall of the housing 110 can compress the third protrusion 156, and the third protrusion 156 forms an insulating wall between the two leads 140 to increase the insulation path between the two leads 140, improve the high voltage withstand insulation capability between the two leads 140, and thus improve the withstand voltage insulation capability of the relay 100.

[0102] See Figures 1 to 7 In one embodiment, the bottom wall of the outer casing 110 is further provided with a recessed third mating groove 112. The third mating groove 112 is disposed between the two leads 140. The third protrusion 156 is at least partially installed in the third mating groove 112 and abuts against the inner wall of the third mating groove 112 with interference fit.

[0103] The third mating groove 112 is recessed in the bottom wall of the outer casing 110, and is located between the two lead-out holes 111, corresponding to the third protrusion 156. After the insulating pad 150 is pressed between the ceramic cover 120 and the outer casing 110 with an interference fit, the third protrusion 156 can be at least partially installed in the third mating groove 112.

[0104] At this time, the third protrusion 156 can press against the inner wall of the third mating groove 112 so that the third protrusion 156 is press-fitted into the third mating groove 112, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0105] Of course, in other embodiments, the bottom wall of the housing 110 may not have the third mating groove 112. After the insulating pad 150 is pressed between the ceramic cover 120 and the housing 110 with an interference fit, the third protrusion 156 can directly abut against the bottom wall of the housing 110 with an interference fit, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0106] See Figures 1 to 7In one embodiment, the insulating pad 150 further includes a fourth protrusion 157, which protrudes from the surface of the insulating body 152 facing the ceramic cover 120 and is located between the two leads 140. The fourth protrusion 157 is able to abut against the top wall of the ceramic cover 120 with an interference fit.

[0107] The fourth protrusion 157 is a raised rib on the lower surface of the insulating body 152 and is integrally formed with the insulating body 152. The fourth protrusion 157 protrudes from the lower surface of the insulating body 152, and is also arranged in a strip-like form on the upper surface of the insulating body 152, such as... Figure 5 As shown, the fourth protrusion 157 is located between the two mounting holes 151 and along... Figure 5 The width shown extends to the edge of the insulating body 152.

[0108] After the insulating pad 150 is pressed against the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can abut against the top wall of the ceramic cover 120 with an interference fit through the fourth protrusion 157. In this way, the top wall of the ceramic cover 120 can compress the fourth protrusion 157, and the fourth protrusion 157 forms an insulating wall between the two leads 140, thereby increasing the insulation path between the two leads 140, improving the high voltage withstand insulation capability between the two leads 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0109] See Figures 1 to 7 In one embodiment, the top wall of the ceramic cover 120 is further provided with a recessed fourth mating groove 123, the fourth mating groove 123 being located between the two leads 140, and the fourth protrusion 157 being at least partially installed in the fourth mating groove 123 and interfering with the inner wall of the fourth mating groove 123.

[0110] The fourth mating groove 123 is recessed in the top wall of the ceramic cover 120 and is located between the two fixing holes 121, corresponding to the fourth protrusion 157. The engagement of the fourth protrusion 157 with the fourth mating groove 123 enables the positioning of the insulating pad 150 and the ceramic cover 120, facilitating the installation of the insulating pad 150 and preventing it from shifting relative to the ceramic cover 120, thus ensuring that the insulating pad 150 is accurately installed on the top of the ceramic cover 120.

[0111] After the insulating pad 150 is disposed on the top of the ceramic cover 120, the fourth protrusion 157 can be at least partially installed in the fourth mating groove 123. At this time, the fourth protrusion 157 can press against the inner wall of the fourth mating groove 123 so that the fourth protrusion 157 is press-fitted into the fourth mating groove 123, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0112] Of course, in other embodiments, the top wall of the ceramic cover 120 may not have the fourth mating groove 123. After the insulating pad 150 is pressed between the ceramic cover 120 and the outer shell 110 with an interference fit, the fourth protrusion 157 can directly abut against the top wall of the ceramic cover 120 with an interference fit, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0113] See Figures 1 to 7 In one embodiment, the insulating pad 150 further includes a fifth protrusion 158, which protrudes from the edge of the insulating body 152 away from the ceramic cover 120 and surrounds the periphery of the insulating body 152. The fifth protrusion 158 can abut against the top wall of the outer shell 110 in an interference fit.

[0114] The fifth protrusion 158 is a raised rib on the upper surface of the insulating body 152 and is integrally formed with the insulating body 152. The fifth protrusion 158 protrudes from the upper surface of the insulating body 152 and is arranged in a circular shape at the edge of the upper surface of the insulating body 152, such as... Figure 4 As shown.

[0115] After the insulating pad 150 is pressed against the housing 110 and the ceramic cover 120 with an interference fit, the insulating pad 150 can abut against the edge of the bottom wall of the housing 110 with an interference fit through the fifth protrusion 158. In this way, the bottom wall of the housing 110 can compress the fifth protrusion 158, thereby achieving insulation isolation of the lead-out terminal 140, improving the withstand voltage insulation capability of the lead-out terminal 140, and thus improving the withstand voltage insulation capability of the relay 100.

[0116] The relay 100 of this application has an insulating pad 150 pressed between the housing 110 and the ceramic cover 120 with an interference fit, abutting against the bottom wall of the housing 110 and the top wall of the ceramic cover 120. In this way, the insulating pad 150 can achieve insulation isolation of the lead-out terminal 140, eliminating the need for adhesive application at the connection between the lead-out terminal 140 and the ceramic cover 120, and improving the withstand voltage insulation capability between the lead-out terminals 140. Simultaneously, the insulating pad 150 can also cover the periphery of the ceramic cover 120 near the top wall of the housing 110 to isolate the yoke clamp 130 from the ceramic cover 120, increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, improving the high and low voltage withstand voltage insulation capability between the yoke clamp 130 and the lead-out terminal 140, thereby improving the reliability of the relay 100.

[0117] Meanwhile, the insulating pad 150 has a flange 153 on the edge of the insulating body 152, and the flange 153 protrudes from the insulating body 152 towards the ceramic cover 120. In this way, the flange 153 can separate the ceramic cover 120 from the yoke clamp 130 on the periphery of the ceramic cover 120, thereby increasing the creepage distance between the yoke clamp 130 and the lead-out terminal 140, effectively preventing electrical short circuits and insulation failure, improving the high and low voltage withstand voltage insulation capability between the yoke clamp 130 and the lead-out terminal 140, and improving the reliability of the relay 100.

[0118] The insulating pad 150 may have a first protrusion 154 surrounding the mounting hole 151 on the insulating body 152. The first protrusion 154 abuts against the bottom wall of the housing 110 to achieve insulation isolation of the lead-out terminal 140 and improve the withstand voltage insulation capability of the lead-out terminal 140. Furthermore, a first mating groove may be provided on the bottom wall of the housing 110 to interference fit the first protrusion 154, further improving the insulation and sealing performance between the housing 110 and the ceramic cover 120.

[0119] The insulating pad 150 can have a second protrusion 155 surrounding the mounting hole 151 on the insulating body 152. The second protrusion 155 abuts against the top wall of the ceramic cover 120 to achieve insulation isolation of the lead-out end 140 and improve the withstand voltage insulation capability of the lead-out end 140. Furthermore, a second mating groove 122 can be provided on the top wall of the ceramic cover 120. The second mating groove 122 interference fits the second protrusion 155 to achieve positioning of the insulating pad 150 and improve the withstand voltage insulation capability of the lead-out end 140.

[0120] The insulating pad 150 may have a third protrusion 156 located between the two mounting holes 151 on the insulating body 152. The third protrusion 156 abuts against the bottom wall of the housing 110 to form an insulating wall between the two leads 140, increasing the insulation path between the two leads 140, improving the high-voltage withstand insulation capability between the two leads 140, and thus improving the withstand voltage insulation capability of the relay 100. Furthermore, a third mating groove 112 may be provided on the bottom wall of the housing 110 to interference-fit the third protrusion 156, further improving the high-voltage withstand insulation capability between the two leads 140.

[0121] The insulating pad 150 can have a fourth protrusion 157 between the two mounting holes 151 on the insulating body 152. The fourth protrusion 157 abuts against the top wall of the ceramic cover 120 to form an insulating wall between the two leads 140, increasing the insulation path between the two leads 140, improving the high-voltage withstand insulation capability between the two leads 140, and thus improving the withstand voltage insulation capability of the relay 100. Furthermore, a fourth mating groove 123 can be provided on the top wall of the ceramic cover 120. The fourth mating groove 123 interference-fits the fourth protrusion 157, thereby positioning the insulating pad 150 and improving the high-voltage withstand insulation capability between the two leads 140.

[0122] The insulating pad 150 may have a fifth protrusion 158 on the peripheral edge of the insulating body 152. The fifth protrusion 158 abuts against the edge of the bottom wall of the housing 110 to achieve insulation isolation of the lead-out terminal 140, improve the withstand voltage insulation capability of the lead-out terminal 140, and thus improve the withstand voltage insulation capability of the relay 100.

[0123] 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.

[0124] The embodiments described above are merely illustrative of 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 relay, characterized in that, include: Outer shell (110); A ceramic cover (120) is disposed within the outer casing (110); A yoke clamp (130) is disposed in the outer shell (110) and at least partially surrounds the periphery of the ceramic cover (120); An outlet (140) is inserted into the ceramic cover (120) and extends from the inside of the outer casing (110) to the outside of the outer casing (110); and An insulating pad (150) is fitted around the periphery of the lead-out end (140) and covers the top wall of the ceramic cover (120), and is press-fitted between the outer shell (110) and the ceramic cover (120). The insulating pad (150) has a downwardly extending flange (153) that extends into the gap between the outer shell (110) and the ceramic cover (120) and surrounds the periphery of the ceramic cover (120).

2. The relay according to claim 1, characterized in that, The insulating pad (150) is made of elastic insulating material. The insulating pad (150) includes an insulating body (152) and a flange (153). The flange (153) surrounds the periphery of the insulating body (152) and extends toward the bottom wall away from the outer shell (110). The flange (153) surrounds the periphery of the ceramic cover (120) at one end near the bottom wall of the outer shell (110).

3. The relay according to claim 2, characterized in that, The position of the end of the flange (153) away from the bottom wall of the outer shell (110) is lower than the position of the end of the yoke clamp (130) near the bottom wall of the outer shell (110); And / or, the flange (153) is located between the ceramic cover (120) and the yoke clamp (130); And / or, the insulating body (152) and the flange (153) are an integral structure.

4. The relay according to claim 2, characterized in that, The relay (100) also includes a permanent magnet (170), which is disposed between the ceramic cover (120) and the yoke clamp (130); The flange (153) extends downward and abuts against one end of the permanent magnet (170) facing the bottom wall of the outer shell (110).

5. The relay according to claim 2, characterized in that, The insulating pad (150) further includes a first protrusion (154), which protrudes from the surface of the insulating body (152) away from the ceramic cover (120) and surrounds the periphery of the lead-out end (140). The first protrusion (154) can abut against the bottom wall of the outer shell (110) with an interference fit.

6. The relay according to claim 5, characterized in that, The outer casing (110) is provided with an outlet hole (111) through which the outlet end (140) passes. The bottom wall of the outer casing (110) is provided with a recessed first mating groove. The first mating groove surrounds the periphery of the outlet hole (111). The first protrusion (154) is at least partially installed in the first mating groove and abuts against the inner wall of the first mating groove with interference fit.

7. The relay according to claim 2, characterized in that, The insulating pad (150) further includes a second protrusion (155), which protrudes from the surface of the insulating body (152) facing the ceramic cover (120) and surrounds the periphery of the lead-out end (140). The second protrusion (155) can abut against the top wall of the ceramic cover (120) with an interference fit.

8. The relay according to claim 7, characterized in that, The ceramic cover (120) is provided with a fixing hole (121) through which the lead-out end (140) passes. The top wall of the ceramic cover (120) is provided with a recessed second mating groove (122). The second mating groove (122) is at least partially surrounded by the fixing hole (121). The second protrusion (155) is at least partially installed in the second mating groove (122) and abuts against the inner wall of the second mating groove (122) with interference fit.

9. The relay according to any one of claims 2 to 8, characterized in that, The relay (100) includes two leads (140) that are spaced apart and pass through the housing (110). The insulating pad (150) has two mounting holes (151) and is fitted onto the two leads (140) through the two mounting holes (151).

10. The relay according to claim 9, characterized in that, The insulating pad (150) further includes a third protrusion (156), which protrudes from the surface of the insulating body (152) away from the ceramic cover (120) and is located between the two leads (140). The third protrusion (156) can press against the bottom wall of the outer shell (110) to insulate and isolate the two leads (140).

11. The relay according to claim 10, characterized in that, The bottom wall of the outer casing (110) is also provided with a recessed third mating groove (112), the third mating groove (112) is disposed between the two leads (140), and the third protrusion (156) is at least partially installed in the third mating groove (112) and pressurizes against the inner wall of the third mating groove (112).

12. The relay according to claim 9, characterized in that, The insulating pad (150) further includes a fourth protrusion (157), which protrudes from the surface of the insulating body (152) facing the ceramic cover (120) and is located between the two leads (140). The fourth protrusion (157) can fit into the top wall of the ceramic cover (120) with an interference fit.

13. The relay according to claim 12, characterized in that, The top wall of the ceramic cover (120) is also provided with a recessed fourth mating groove (123), the fourth mating groove (123) is located between the two leads (140), and the fourth protrusion (157) is at least partially installed in the fourth mating groove (123) and pressurizes against the inner wall of the fourth mating groove (123).

14. The relay according to claim 9, characterized in that, The insulating pad (150) further includes a fifth protrusion (158), which protrudes from the edge of the surface of the insulating body (152) away from the ceramic cover (120) and surrounds the periphery of the insulating body (152). The fifth protrusion (158) can abut against the top wall of the outer shell (110) with interference fit.

15. The relay according to any one of claims 1 to 8, characterized in that, The insulating pad (150) is made of rubber or silicone material; And / or, the relay is a high-voltage DC relay.

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