Connection structure of lead and insulating cover and relay

Abstract

The application relates to a connection structure of a leading end and an insulating cover and a relay. The relay comprises a leading end, an insulating cover and a connection structure of the leading end and the insulating cover. The leading end comprises a static contact and a connecting piece. The static contact comprises a first part exposed to the insulating cover. The connecting piece is arranged around the static contact. The upper and lower ends of the connecting piece are respectively sealed and welded to the static contact and the insulating cover. The connecting piece comprises at least one bending part. The bending part is in a bending shape along a vertical section. When the first part and the insulating cover are welded to the connecting piece respectively, the bending part can be deformed. The deformation can absorb the welding stress between the connecting piece and the insulating cover and / or between the connecting piece and the static contact. Therefore, the cracking phenomenon of the insulating cover caused by the welding stress can be effectively avoided, and the product qualification rate of the relay can be ensured.

Description

Technical Field

[0001] This application relates to the field of electronic control device technology, and in particular to a connection structure between a lead-out terminal and an insulating cover, and a relay. Background Technology

[0002] A relay is an electronic control device that essentially acts as an "automatic switch" by using a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits, and is widely used in fields such as new energy vehicles. High-voltage DC relays are a type of relay. Most existing high-voltage DC relays adopt a direct-acting structure with a moving spring, utilizing the cooperation of two stationary contacts and one moving spring. Depending on the actual application in the vehicle, the contacts need to connect, disconnect, and switch under load to achieve the "switching" function.

[0003] Currently, some relays connect their stationary contacts to the insulating cover by welding. The temperature generated during welding of the stationary contacts and the insulating cover is extremely high. For example, when brazing is used, there will be welding stress after welding, which can easily cause the insulating cover made of ceramic material to crack on the welding surface. Utility Model Content

[0004] Therefore, it is necessary to address the problem that the ceramic insulating cover is prone to cracking at the welding surface due to the large welding stress generated when the stationary contact and the insulating cover are welded together in existing relays. This problem can be solved by providing a connection structure between the lead-out terminal and the insulating cover, as well as a relay including the connection structure.

[0005] According to one aspect of this application, a connection structure for a lead-out terminal and an insulating cover is provided, the lead-out terminal comprising:

[0006] A stationary contact, the stationary contact including a first portion exposed outside the insulating cover;

[0007] A connector is provided around the stationary contact. The upper and lower ends of the connector are respectively sealed and welded to the first part and the insulating cover in the vertical direction. The connector includes at least one bent portion. The bent portion is curved in the cross-section in the vertical direction so that the bent portion can deform to absorb the welding stress between the connector and the insulating cover, and / or between the connector and the stationary contact.

[0008] In one embodiment, the bent portion includes a bent section, a first connecting section, and a second connecting section. The bent section is arc-shaped, and the first connecting section and the second connecting section are connected through the bent section to form an opening in the connector. One or two of the first connecting section, the second connecting section, and the bent section are welded to the insulating cover, and the remaining portion is welded to the first portion.

[0009] In one embodiment, the first connecting segment and the second connecting segment are arranged vertically at a distance from each other, such that the opening faces or is away from the sidewall of the stationary contact in the horizontal direction, and one of the first connecting segment and the second connecting segment is welded to the first portion and the other is welded to the insulating cover.

[0010] In one embodiment, the first connecting segment and the second connecting segment are arranged at a relative distance in the horizontal direction, and both the first connecting segment and the second connecting segment are welded to the insulating cover, and the curved segment is welded to the first portion, so that the opening is arranged downward in the vertical direction;

[0011] Alternatively, both the first connecting segment and the second connecting segment may be welded to the first part, and the bent segment may be welded to the insulating cover, so that the opening is arranged vertically upwards.

[0012] In one embodiment, both the first connecting segment and the second connecting segment are horizontally welded to the insulating cover, and the bent segment is welded to the first portion; or both the first connecting segment and the second connecting segment are horizontally welded to the first portion, and the bent segment is welded to the insulating cover.

[0013] In one embodiment, one of the first connecting segment and the second connecting segment is welded to the insulating cover, and the other is welded to the first portion.

[0014] In one embodiment, the first connecting segment and the second connecting segment are arranged at right angles.

[0015] In one embodiment, one of the first connecting segment and the second connecting segment extends horizontally and is horizontally welded to the insulating cover or the first portion.

[0016] In one embodiment, the connector includes a plurality of the curved portions, each of the curved portions including a curved segment and a straight segment connected to each other, two adjacent curved portions being connected by the curved segment and the straight segment, and the plurality of curved portions being arranged in a left-right back-and-forth sequence, and the connector being arranged to extend vertically, the curved portion at one end of the connector being welded to the first part, and the curved portion at the other end of the connector being welded to the insulating cover.

[0017] According to another aspect of this application, a relay is provided, including the connection structure described in any of the above embodiments.

[0018] The aforementioned connection structure between the lead-out terminal and the insulating cover, and the relay including this connection structure, involves providing a connector around the stationary contact in the lead-out terminal. The upper and lower ends of the connector are respectively sealed and welded to the first part of the stationary contact and the insulating cover in the vertical direction. Simultaneously, by including at least one curved portion in the connector, significant stress is generated at the weld joint after welding the connector to the stationary contact and to the insulating cover. Under this stress, the connector can deform, absorbing the welding stress between the connector and the insulating cover, and / or between the connector and the stationary contact. Therefore, it effectively prevents cracking of the insulating cover's weld surface caused by the large welding stress, thereby ensuring the relay's product qualification rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance of a relay provided in one embodiment of this application.

[0020] Figure 2 A cross-sectional view of a relay provided in an embodiment of this application.

[0021] Figure 3 This is an exploded view of the contact module in a relay provided in an embodiment of this application.

[0022] Figure 4 This is a cross-sectional view of the contact module in the relay provided in Embodiment 1 of this application.

[0023] Figure 5 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0024] Figure 6 This is a cross-sectional view of the contact module in the relay provided in Embodiment 2 of this application.

[0025] Figure 7 for Figure 6 A magnified view of region B in the middle.

[0026] Figure 8This is a cross-sectional view of the contact module in the relay provided in Embodiment 3 of this application.

[0027] Figure 9 for Figure 8 A magnified view of region C in the middle.

[0028] Figure 10 This is a cross-sectional view of the contact module in the relay provided in Embodiment 4 of this application.

[0029] Figure 11 for Figure 10 A magnified diagram of region D in the middle.

[0030] Figure 12 This is a cross-sectional view of the contact module in the relay provided in Embodiment 5 of this application.

[0031] Figure 13 for Figure 12 A magnified view of region E in the middle.

[0032] Figure 14 This is a cross-sectional view of the contact module in the relay provided in Embodiment Six of this application.

[0033] Figure 15 for Figure 14 A magnified diagram of region F in the middle.

[0034] Figure 16 for Figure 15 A magnified diagram of region G in the middle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Relay; 100. Lead-out terminal; 110. Stationary contact; 111. First part; 112. Second part; 120. Connector; 120a. Opening; 121. Bending part; 1211. Bending section; 1212. First connecting section; 1213. Second connecting section; 1214. Straight section; 200. Insulating cover; 201. Receiving cavity; 202. Mounting hole; 300. Moving contact; 400. Electromagnetic drive assembly; 410. Push rod; 420. Moving iron core. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] This application provides a connection structure between a lead-out terminal and an insulating cover, and a relay including the connection structure. The relay is used in an automatic control circuit and plays a role in automatic adjustment, safety protection, and circuit switching. For example, it can be used to connect a load power supply and a load, control the on / off state of the circuit between the load power supply and the load, thereby playing a role in protecting the load through circuit switching and automatic adjustment, and preventing the load from being damaged by excessive current.

[0044] The following description uses a high-voltage DC relay used in an electric vehicle charging station as an example to illustrate the structure of the relay provided in this application. It is understood that the relay provided in this application can be any type of relay used in other fields, and is not limited to a high-voltage DC relay used in electric vehicle charging stations; there are no particular limitations in this regard.

[0045] The following description uses a high-voltage DC relay used in an electric vehicle charging station as an example to illustrate the structure of the relay provided in this application and the connection structure between its leads and the insulating cover. It is understood that the relay provided in this application can be any type of relay used in other fields, and is not limited to a high-voltage DC relay used in electric vehicle charging stations; there are no particular limitations on this.

[0046] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the appearance of a relay 10 according to an embodiment of this application is shown. Figure 2A cross-sectional view of the internal structure of the relay 10 is shown. An embodiment of the relay 10 provided in this application includes a lead-out terminal 100, an insulating cover 200, a moving contact 300, and an electromagnetic drive assembly 400. The lead-out terminal 100 and the insulating cover 200 have a connection structure. In this connection structure, the lead-out terminal 100 includes a stationary contact 110, which is connected to the insulating cover 200 and at least partially exposed outside the insulating cover 200. In the embodiment shown in the figure, there are two stationary contacts 110, one for connecting to the load power supply and the other for connecting to the load (e.g., an automobile). The electromagnetic drive assembly 400 is connected to the moving contact 300 and is used to drive the moving contact 300 to move relative to the stationary contact 110, enabling it to contact or disengage from the stationary contact 110, thereby controlling the on / off state of the load power supply and the load circuit.

[0047] Specifically, such as Figure 2 As shown, the electromagnetic drive assembly 400 includes a push rod 410, a moving iron core 420, and an energized coil (not shown in the figure). The lower end of the push rod 410 is connected to the moving iron core 420, and the upper end of the push rod 410 is connected to the moving contact piece 300. When the coil is energized, the coil generates a magnetic field, and the moving iron core 420 is driven by the magnetic force in the magnetic field to move vertically. This allows the push rod 410 to drive the moving contact piece 300 to abut against or disengage from the stationary contact 110, thereby realizing the switching on and off of the circuit.

[0048] The purpose of the insulating cover 200 is that when the relay 10 operates, especially during the circuit disconnection process, the current between the contacts is suddenly interrupted, generating an electric arc. This arc is caused by the sudden change in the coil current when the coil of the relay 10 is de-energized, resulting in a high self-induced electromotive force in the coil, which in turn generates an electric spark between the contacts. Therefore, the insulating cover 200 can isolate the electric arc generated by the relay 10 during operation from the external environment and suppress the generation and spread of the arc, thereby ensuring the safe operation of the circuit and improving the lifespan of the relay 10.

[0049] In the embodiments of this application, the insulating cover 200 is made of ceramic, but this is not a limitation; any material capable of insulation is acceptable. However, since ceramic has better insulation properties and can play a role in extinguishing arcs to a certain extent, using ceramic as the material for the insulating cover 200 is a preferred implementation.

[0050] like Figure 2As shown, in the embodiment of this application, the insulating cover 200 forms a receiving cavity 201 with an open end, and the insulating cover 200 has a mounting hole 202 communicating with the receiving cavity 201 at the end away from the opening; the stationary contact 110 passes through the mounting hole 202. More specifically, the stationary contact 110 includes a first part 111 and a second part 112 connected to each other. Both the first part 111 and the second part 112 are cylindrical, and the diameter of the first part 111 is larger than the diameter of the second part 112. In the specific arrangement of the first part 111 and the second part 112, the first part 111 is located outside the insulating base and along the vertical direction ( Figure 4 The second part 112 is spaced apart from the insulating cover 200 in the Y direction. It passes through the mounting hole 202 and partially extends into the receiving cavity 201. The first part 111 of one stationary contact 110 is used to connect to the power supply, and the first part 111 of the other stationary contact 110 is used to connect to the load. The ends of the second parts 112 of the two stationary contacts 110 away from the first parts 111 are used to connect to the moving contact 300.

[0051] More specifically, in the connection structure between the lead-out terminal 100 and the insulating cover 200, the first part 111 of the stationary contact 110 is connected to the top wall of the insulating cover 200 by welding, especially in one embodiment, such as Figure 3 and Figure 4 As shown, the lead-out end 100 also includes a connector 120, which is disposed between the first part 111 and the insulating cover 200 and surrounds the second part 112 of the stationary contact 110. The upper and lower ends of the connector 120 are respectively sealed and welded to the first part 111 of the stationary contact 110 and the insulating cover 200 in the vertical direction.

[0052] However, as described in the background art, the temperature generated when the stationary contact 110 is welded to the insulating cover 200 is extremely high. For example, when brazing is used, the instantaneous temperature generated is extremely high. After the molten solder solidifies, it will pull on the stationary contact 110 and the insulating cover 200, thus generating extremely high stress. Alternatively, the molten solder will pull on the connector 120, and in order to counteract the pulling force, the connector 120 itself will also generate a large stress. All of these can easily lead to cracking of the insulating cover 200 made of ceramic material.

[0053] To address the aforementioned problems, the applicant conceived of improving the above-described embodiments, such as... Figures 4 to 15As shown, in some of the improved embodiments, the connector 120 includes at least one bent portion 121, which is curved in the vertical direction and has a protrusion. During welding, the stress generated by the connector 120 causes the first portion 111 and / or the insulating cover 200 to interact with the connector 120. Under the action of the above-mentioned interaction force, because the bent portion 121 is curved in the vertical direction, it can deform. This deformation can absorb the welding stress between the connector 120 and the insulating cover 200, and / or between the connector 120 and the stationary contact 110, thereby preventing cracking of the weld surface of the insulating cover 200.

[0054] The structure of each embodiment of the deformable connector 120 will be described below. In some embodiments, such as Figures 4 to 13 As shown, the bent portion 121 has one section, which includes a bent segment 1211, a first connecting segment 1212, and a second connecting segment 1213. As can be seen from the figure, the curved segment 1211 has an arc-shaped cross-section in the vertical direction. The first connecting segment 1212 and the second connecting segment 1213 are connected by the bent segment 1211, such that the first connecting segment 1212 and the second connecting segment 1213 are set at an angle, thereby forming an opening 120a in the connector 120. Optionally, the cross-sectional shapes of the first connecting segment 1212 and the second connecting segment 1213 in the axial direction of the stationary contact 110 extend in a straight direction, or the cross-sectional shapes of the first connecting segment 1212 and the second connecting segment 1213 in the axial direction of the stationary contact 110 may also have a certain curvature.

[0055] Specifically, such as Figure 4 and Figure 5 As shown, in Figure 5 In the illustrated embodiment, the first connecting segment 1212 and the second connecting segment 1213 are arranged at a vertical distance from each other, preferably with the first connecting segment 1212 and the second connecting segment 1213 spaced apart along a horizontal direction. Figure 4 The plane extending in the X direction shown in the figure is symmetrically arranged, and the first connecting segment 1212 is welded to the first part 111, and the second connecting segment 1213 is welded to the top surface of the insulating cover 200, such that the opening 120a formed by the connector 120 faces the side wall of the stationary contact 110 (i.e., towards the second part 112), so that the cross-section of the connector 120 in the vertical direction is approximately “(” shaped; or conversely, the first connecting segment 1212 is connected to the top surface of the insulating cover 200, and the second connecting segment 1213 is connected to the first part 111, such that the opening 120a formed by the connector 120 faces away from the side wall of the stationary contact 110 (i.e., facing away from the second part 112), so that the cross-section of the connector 120 in the vertical direction is approximately “)” shaped.

[0056] Thus, during welding, under the pulling or squeezing action of the solder, the first connecting segment 1212 and the second connecting segment 1213 can move closer or further apart in the vertical direction, so that the bent part 121 has a certain amount of deformation in the vertical direction.

[0057] As shown in the figure Figure 6 and Figure 7 Another embodiment of the connector 120 structure is shown, in Figure 7 In the embodiments described, the first connecting segment 1212 and the second connecting segment 1213 are arranged at intervals relative to each other in the horizontal direction. Preferably, the first connecting segment 1212 and the second connecting segment 1213 are arranged symmetrically with a plane extending in the vertical direction as the symmetrical plane. The first connecting segment 1212 and the second connecting segment 1213 are both welded to the top surface of the insulating cover 200. The convex bulge formed by the curved segment 1211 is welded to the first part 111, so that the opening 120a formed by the connector 120 faces the top surface of the insulating cover 200, that is, the cross-section of the connector 120 in the vertical direction is approximately “︵” shaped. Alternatively, the first connecting segment 1212 and the second connecting segment 1213 can be welded to the first part 111, and the convex bulge formed by the curved segment 1211 can be welded to the top surface of the insulating cover 200, so that the opening 120a formed by the connector 120 faces the first part 111, that is, the cross-section of the connector 120 in the vertical direction is approximately “︶” shaped.

[0058] Using the structure of the connector 120 in the above embodiment, during welding, under the pulling or squeezing action of the solder, the bulge formed by the bent section 1211 can move in the vertical direction, so that the bent part 121 also has a certain amount of deformation in the vertical direction.

[0059] See Figure 8 and Figure 9 , Figure 8 and Figure 9 The illustrated embodiments and Figure 6 and Figure 7The similarities between the illustrated embodiments are that the first connecting segment 1212 and the second connecting segment 1213 are also arranged relatively spaced in the horizontal direction, and the bulge formed by the curved segment 1211 also abuts against the first part 111 of the stationary contact 110; the differences are that the first connecting segment 1212 and the second connecting segment 1213 both extend in the horizontal direction, and the first connecting segment 1212 and the second connecting segment 1213 are both horizontally welded to the top wall of the insulating cover 200 (i.e., the first connecting segment 1212 and the second connecting segment 1213 are attached to the top wall of the insulating cover 200 on one side along their own thickness direction), so that the cross-section of the connector 120 in the vertical direction is approximately “Ω” shaped. Of course, it can be understood that the bulge formed by the curved segment 1211 can also abut against the top wall of the insulating cover 200, and the opening 120a formed by the first connecting segment 1212 and the second connecting segment 1213 faces the first part 111 of the stationary contact 110, in which case the first extension segment and the second extension segment are both attached to the first part 111 on one side along their own thickness direction.

[0060] It is easy to see that when the connector 120 of this embodiment is welded, the bulge formed by the bent section 1211 can move along the axial direction of the stationary contact 110, so that the bent part 121 has a certain amount of deformation in the axial direction of the stationary contact 110. Moreover, since the first connecting section 1212 and the second connecting section 1213 are both horizontally welded to the insulating cover 200 or the first part 111 of the stationary contact 110, the connector 120 can be more firmly connected to the insulating cover 200 or the first part 111 of the stationary contact 110.

[0061] Preferably, there is a smooth transition between the first connecting segment 1212 and the bending segment 1211, and between the second connecting segment 1213 and the bending segment 1211, so as to improve the deformation effect of the bending portion 121.

[0062] See Figures 10 to 13 , Figures 10 to 13 Two other embodiments of the connector 120 are shown, in which the first connecting segment 1212 and the second connecting segment 1213 are arranged at right angles, wherein one of the first connecting segment 1212 and the second connecting segment 1213 is welded to the top wall of the insulating cover 200, and the other is welded to the first portion 111 of the stationary contact 110; preferably, one of the first connecting segment 1212 and the second connecting segment 1213 extends horizontally and is horizontally welded to the insulating cover 200 or the first portion 111 of the stationary contact 110, so that the vertical cross-section of the connector 120 is "┘" or "┐" shaped. For example Figure 10 and Figure 11In the embodiment shown, the first connecting segment 1212 extends horizontally and is horizontally welded to the top wall of the insulating cover 200 (i.e., the first connecting segment 1212 is attached to the top wall of the insulating cover 200 on one side along its own thickness direction), the end of the second connecting segment 1213 is connected to the first part 111 of the stationary contact 110, and the first connecting segment 1212 extends in a direction away from the second part 112 of the stationary contact 110, so that the cross-section of the connector 120 in the vertical direction is “┘” shaped; Figure 12 and Figure 13 In the embodiment shown, the end of the first connecting segment 1212 is connected to the first part 111, the second connecting segment 1213 extends horizontally and is horizontally welded to the top wall of the insulating cover 200 (i.e., the second connecting segment 1213 is attached to the top wall of the insulating cover 200 on one side along its own thickness direction), and the second connecting segment 1213 extends away from the second part 112 so that the cross-section of the connector 120 in the vertical direction is “┐” shaped.

[0063] Based on the structure of the above embodiment, when stress is generated in the connector 120 during the welding process, the connector 120 is stretched and can deform to a certain extent in both the vertical and horizontal directions.

[0064] It should be noted that the structure of the connector 120 is not limited to the structure shown in the embodiment in the figure. It can be understood that in the embodiment where the first connecting segment 1212 is horizontally welded to the first part 111 or the insulating cover 200, the first connecting segment 1212 may also extend towards the second part 112 so that the vertical cross-section of the connector 120 is “└” shaped; in the embodiment where the second connecting segment 1213 is horizontally welded to the first part 111 or the insulating cover 200, the second connecting segment 1213 may also extend towards the second part 112 so that the vertical cross-section of the connector 120 is “┌” shaped.

[0065] It is also understandable that the first connecting segment 1212 and the second connecting segment 1213 are not limited to being set at a right angle, but can also be set at other acute or obtuse angles, as long as the connecting member 120 can be deformed, there is no particular limitation here.

[0066] See Figure 14 , Figure 15 and Figure 16This is another embodiment of the connector 120 structure. In this embodiment, the connector 120 includes a plurality of curved portions 121. Each curved portion 121 includes a curved segment 1211 and a straight segment 1214 connected to each other. Two adjacent curved portions 121 are connected by the curved segment 1211 and the straight segment 1214. The plurality of curved portions 121 are arranged in a left-right back-and-forth sequence, and the connector 120 is arranged to extend in the vertical direction. The curved portion 121 located at one end of the connector 120 (i.e., the curved portion 121 located at the upper vertical direction) is welded to the first part 111 of the stationary contact 110, and the curved portion 121 located at the other end of the connector 120 (i.e., the curved portion 121 located at the lower vertical direction) is welded to the top wall of the insulating cover 200.

[0067] Thus, as can be seen from the figure, the vertical cross-section of the connector 120 is a structure in which multiple “<” or ">” shapes are superimposed vertically.

[0068] It is easy to understand that in this embodiment, when the connector 120 is subjected to tension and generates stress, because multiple bending portions 121 are superimposed, the structure of the connector 120 in this embodiment is similar to a spring, and it will also undergo a certain deformation along the axial direction of the stationary contact 110.

[0069] In summary, this application improves the design of the connector 120 by making a series of modifications, enabling the connector 120 to deform under external force. This allows the connector 120 to absorb the welding stress generated during welding, thereby reducing the force exerted by the connector 120 on the insulating cover 200 during welding. As a result, it effectively avoids cracking of the insulating cover 200 caused by the large stress generated during welding, ensuring the product qualification rate of the relay 10.

[0070] 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.

[0071] 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 connection structure between a lead-out terminal and an insulating cover, characterized in that, The lead-out terminal (100) includes: A stationary contact (110) includes a first portion (111) exposed outside the insulating cover (200); A connector (120) is arranged around the stationary contact (110). The upper and lower ends of the connector (120) in the vertical direction are respectively sealed and welded to the first part (111) and the insulating cover (200). The connector (120) includes at least one bent portion (121). The bent portion (121) is bent in the cross-section in the vertical direction so that the bent portion (121) can deform to absorb the welding stress between the connector (120) and the insulating cover (200) and / or between the connector (120) and the stationary contact (110).

2. The connection structure according to claim 1, characterized in that, The curved portion (121) includes a curved section (1211), a first connecting section (1212), and a second connecting section (1213). The curved section (1211) is arc-shaped. The first connecting section (1212) and the second connecting section (1213) are connected through the curved section (1211) so that the connector (120) forms an opening (120a). One or two of the first connecting section (1212), the second connecting section (1213), and the curved section (1211) are welded to the insulating cover (200), and the remaining portion is welded to the first portion (111).

3. The connection structure according to claim 2, characterized in that, The first connecting segment (1212) and the second connecting segment (1213) are arranged at a vertical distance from each other, such that the opening (120a) faces or is away from the side wall of the stationary contact (110) in the horizontal direction. One of the first connecting segment (1212) and the second connecting segment (1213) is welded to the first part (111), and the other is welded to the insulating cover (200).

4. The connection structure according to claim 2, characterized in that, The first connecting segment (1212) and the second connecting segment (1213) are arranged at a distance from each other in the horizontal direction, and both the first connecting segment (1212) and the second connecting segment (1213) are welded to the insulating cover (200). The curved segment (1211) is welded to the first part (111) so that the opening (120a) is arranged downward in the vertical direction. Alternatively, the first connecting segment (1212) and the second connecting segment (1213) may both be welded to the first part (111), and the bent segment (1211) may be welded to the insulating cover (200), so that the opening (120a) is arranged vertically upward.

5. The connection structure according to claim 2, characterized in that, The first connecting segment (1212) and the second connecting segment (1213) are both horizontally welded to the insulating cover (200), and the bent segment (1211) is welded to the first part (111); or the first connecting segment (1212) and the second connecting segment (1213) are both horizontally welded to the first part (111), and the bent segment (1211) is welded to the insulating cover.

6. The connection structure according to claim 2, characterized in that, One of the first connecting segment (1212) and the second connecting segment (1213) is welded to the insulating cover (200), and the other is welded to the first part (111).

7. The connection structure according to claim 6, characterized in that, The first connecting segment (1212) and the second connecting segment (1213) are arranged at right angles.

8. The connection structure according to claim 6 or 7, characterized in that, One of the first connecting segment (1212) and the second connecting segment (1213) extends horizontally and is horizontally welded to the insulating cover (200) or the first part (111).

9. The connection structure according to claim 1, characterized in that, The connector (120) includes a plurality of the bent portions (121), each of the bent portions (121) including a bent segment (1211) and a straight segment (1214) connected to each other. Two adjacent bent portions (121) are connected by the bent segment (1211) and the straight segment (1214). The plurality of bent portions (121) are arranged in a left-right back-and-forth manner, and the connector (120) is arranged to extend vertically. The bent portion (121) at one end of the connector (120) is welded to the first part (111), and the bent portion (121) at the other end of the connector (120) is welded to the insulating cover (200).

10. A relay, characterized in that, Includes the connection structure as described in any one of claims 1-9.

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