relay

Abstract

This application relates to a relay comprising a housing, a stationary contact, a moving contact, and a first magnetic conductor. One end of the stationary contact is disposed inside the housing; at least a portion of the moving contact is disposed inside the housing and is movable relative to the stationary contact within the housing, allowing the moving contact to contact or separate from the stationary contact; the first magnetic conductor is located on the side of the moving contact facing the stationary contact, and at least a portion of the first magnetic conductor is disposed outside the housing. This relay facilitates the installation of the magnetic conductor for short-circuit protection components, which is beneficial for relay production.

Description

Technical Field

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

[0002] A relay is an electrical control device that uses the switching of a small current to control the switching of a large current. It is widely used in household appliances, automobiles, industrial control, power systems, and communication devices. When a fault short-circuit current occurs in a relay, a large electrodynamic repulsive force is generated between the moving and stationary contacts, causing them to spring apart.

[0003] Some relays include short-circuit protection components. The magnetic conductor of the short-circuit protection component is located on one side of the moving contact. When the stationary contact contacts the moving contact to conduct current to the moving contact, the magnetic conductor of the short-circuit protection component generates a magnetic attraction force with the moving contact to resist the moving contact being pushed away by the electrodynamic repulsion force between the stationary contact and the moving contact.

[0004] However, the installation of short-circuit protection components in related technology relays is inconvenient, which is detrimental to relay production. Utility Model Content

[0005] Therefore, it is necessary to provide a relay that facilitates the installation of a magnetic component for short-circuit protection, thereby improving relay production.

[0006] A relay is provided, comprising:

[0007] Cover;

[0008] A stationary contact element, one end of which is disposed inside the cover;

[0009] A movable contact, at least a portion of which is disposed inside the housing and movable relative to the stationary contact within the housing, such that the movable contact can contact or separate from the stationary contact; and

[0010] A first magnetic conductive element is located on the side of the moving contact facing the stationary contact, and at least a portion of the first magnetic conductive element is disposed outside the cover.

[0011] In this type of relay, at least a portion of the first magnetic conductor of the short-circuit protection component is disposed outside the housing. On the one hand, the first magnetic conductor can be installed outside the housing, and the larger space outside the housing facilitates the installation of the first magnetic conductor of the short-circuit protection component and reduces the installation difficulty of the first magnetic conductor. On the other hand, it reduces the space occupied by the first magnetic conductor inside the housing, which is beneficial for the placement of other components inside the housing.

[0012] In one embodiment, there are two stationary contacts, which are spaced apart, and the two ends of the moving contact can respectively contact or separate from the two stationary contacts.

[0013] In one embodiment, the system further includes a housing and a sealant layer. The housing is disposed outside the cover, with at least a portion of the housing spaced apart from the cover. The sealant layer is disposed between the housing and the cover and is bonded to the first magnetic conductive element. This prevents external dust and other foreign matter, as well as water, from entering the relay and affecting its normal operation. It also secures the first magnetic conductive element to the cover, preventing movement relative to the cover. Because the sealant layer is bonded to the first magnetic conductive element, the first magnetic conductive element is fixed to the cover upon curing, eliminating the need for additional steps to fix the first magnetic conductive element. This facilitates the installation of short-circuit protection components and reduces the number of assembly steps for the relay, thus benefiting relay production and reducing manufacturing costs.

[0014] In one embodiment, the cover has a mounting groove on the side facing the outer shell, and at least a portion of the first magnetic conductor is disposed in the mounting groove. Thus, by providing a mounting groove on the cover, the mounting position of the first magnetic conductor can be positioned using the mounting groove.

[0015] In one embodiment, the depth of the mounting groove is greater than the thickness of the first magnetic conductive element, and a portion of the sealant layer extends into the interior of the mounting groove and contacts the first magnetic conductive element. Therefore, after the first magnetic conductive element is placed in the mounting groove, space can be reserved in the mounting groove to accommodate the sealant layer, allowing a portion of the sealant layer to extend into the mounting groove and contact the first magnetic conductive element, thereby facilitating the fixation of the first magnetic conductive element.

[0016] In one embodiment, the mounting groove has a first sidewall and a second sidewall. The first sidewall is closer to the groove opening than the second sidewall. Along the groove opening towards the bottom, the first sidewall gradually slopes inwards towards the groove's interior. The second sidewall connects the first sidewall to the groove bottom and abuts against the first magnetic component, which in turn abuts against the groove bottom. This pre-fixes the first magnetic component in the mounting groove. The second sidewall provides a pre-tightening force to the first magnetic component, reducing the risk of displacement relative to the cover during transfer and facilitating precise installation.

[0017] In one embodiment, the second sidewall is perpendicular to the bottom of the mounting groove, and the sidewall of the mounting groove further includes a third sidewall parallel to the second sidewall, the third sidewall being disposed at the end of the first sidewall away from the second sidewall.

[0018] In one embodiment, the cover is provided with a through hole that extends through the interior and exterior of the cover, and a portion of the first magnetic conductive element passes through the through hole and extends into the interior of the cover. Therefore, when the moving contact contacts the stationary contact, the distance between the first magnetic conductive element and the moving contact can be reduced, further decreasing the risk of the moving contact and the stationary contact being bounced apart.

[0019] In one embodiment, the first magnetically conductive element includes a first magnetically conductive body and two first extensions. Both first extensions are connected to the first magnetically conductive body and are spaced apart. The first magnetically conductive body is located on the side of the cover facing the outer shell. Two through holes are provided, and each first extension corresponds to one of the through holes, with the first extension inserted into its corresponding through hole. Therefore, by connecting both first extensions to the first magnetically conductive body, the stability of the first magnetically conductive body on the cover can be improved. Furthermore, since both first extensions extend into the first cavity, when current passes through the moving contact, it helps to reduce the distance between the first magnetically conductive element and the moving contact, improving short-circuit protection.

[0020] In one embodiment, the cover includes a cover body and a protrusion connected to the cover body. The movable contact is disposed inside the cover body, and the protrusion protrudes from the cover body towards the outer shell, supporting the first magnetically conductive body. Thus, by providing the protrusion to support the first magnetically conductive body, the first magnetically conductive body is elevated, preventing the first extension from being too short and difficult to bend, reducing the processing difficulty of the first magnetically conductive component. Furthermore, by elevating the first magnetically conductive body through the protrusion, the length of the first extension extending into the first cavity is reduced, thereby preventing the first magnetically conductive component from interfering with the position of the second magnetically conductive component.

[0021] In one embodiment, the protrusions are at least two, and the at least two protrusions are spaced apart. Thus, by providing at least two protrusions to jointly support the first magnetically conductive body, the assembly level of the first magnetically conductive body can be adjusted by changing the height of the protrusions from the cover body, thereby facilitating the horizontal installation of the first magnetically conductive component in the mounting groove.

[0022] In one embodiment, a second magnetic conductor is further included, at least a portion of which is disposed on the side of the moving contact opposite to the first magnetic conductor. When a fault current passes through the moving contact, the second magnetic conductor generates a magnetic attraction force with the first magnetic conductor to resist the electrodynamic repulsion force between the moving contact and the stationary contact. Thus, when the moving contact contacts the stationary contact, the second magnetic conductor, moving with the moving contact, approaches or contacts the first magnetic conductor, thereby forming a magnetic circuit between the first and second magnetic conductors surrounding the moving contact. When a short-circuit current passes through the moving contact, a magnetic attraction force is generated between the first and second magnetic conductors, which resists the electrodynamic repulsion force between the moving and stationary contacts caused by the short-circuit current, thereby further reducing the risk of the moving and stationary contacts being bounced apart.

[0023] In one embodiment, the second magnetically conductive element includes a second magnetically conductive body and a second extension. The second magnetically conductive body is disposed on the side of the movable contact opposite to the first magnetically conductive element. One end of the second extension is connected to the second magnetically conductive body, and the other end extends toward the first magnetically conductive element. This helps to reduce the distance between the first and second magnetically conductive elements. When current flows through the movable contact, the reduced distance between the first and second magnetically conductive elements further increases the magnetic attraction between them.

[0024] In one embodiment, the end of the second extension away from the second magnetically conductive body protrudes from the side of the moving contact facing the first magnetically conductive element. Therefore, when the moving contact contacts the stationary contact, the distance between the second and first magnetically conductive elements can be further reduced, and when current flows through the moving contact, the magnetic attraction between the first and second magnetically conductive elements is further increased.

[0025] In one embodiment, a pushing assembly for moving the movable contact is further included. The pushing assembly includes a pushing member connected to the movable contact and a limiting member disposed between the pushing member and the first magnetic conductive member. The limiting member includes a first limiting plate and a second limiting plate. The first limiting plate is spaced apart from the pushing member and is close to the first magnetic conductive member. The second limiting plate is connected between the first limiting plate and the pushing member. The movable contact and the second magnetic conductive body are both located on the side of the first limiting plate opposite to the first magnetic conductive member. The second magnetic conductive body is disposed on the side of the movable contact opposite to the first limiting plate. The end of the second extension away from the second magnetic conductive body protrudes from the side of the first limiting plate opposite to the movable contact.

[0026] In one embodiment, the first limiting plate is provided with a clearance hole, and the second extension passes through the clearance hole.

[0027] In one embodiment, the second magnetic conductive body includes a magnetic conductive body and a first connector disposed on the magnetic conductive body. The movable contact includes a movable contact body and a second connector disposed on the movable contact body. The movable contact body is used to contact the stationary contact. One of the first connector and the second connector is a riveting post, and the other is provided with a riveting hole. The first connector and the second connector are riveted together. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of a relay according to some embodiments of this application.

[0029] Figure 2 for Figure 1 A partial schematic diagram of the area after the sealant layer was removed at point A.

[0030] Figure 3 This is a partial cross-sectional view of a relay according to other embodiments of this application.

[0031] Figure 4 This is a partial cross-sectional view of a relay according to some embodiments of this application.

[0032] Figure 5 Figure 4 A magnified view of a section at point B in the middle.

[0033] Figure 6 This is a perspective view of the moving contact, the second magnetic conductor, and the pushing assembly in some embodiments of this application.

[0034] Figure 7 This is a cross-sectional view of the moving contact and the second magnetic guide pushing assembly in some embodiments of this application (when the moving contact is in contact with the stationary contact).

[0035] Figure 8 This is a partial cross-sectional view of a relay according to some embodiments of this application.

[0036] Figure 9 This is a cross-sectional view of the moving contact, the second magnetic conductor, the pushing assembly, and the cover in some other embodiments of this application (when the moving contact and the stationary contact are separated).

[0037] Figure 10 This is a cross-sectional view of the moving contact, the second magnetic conductor, and the pushing assembly in some other embodiments of this application (when the moving contact is in contact with the stationary contact).

[0038] In the picture:

[0039] 1. Outer shell; 2. Cover; 21. Cover body; 211. Slot sidewall; 211a. First sidewall; 211b. Second sidewall; 211c. Third sidewall; 212. Mounting slot; 213. Accommodation space; 22. Protrusion; 3. Sealing layer; 4. Moving contact; 41. Moving contact body; 42. Riveting post; 5. Short circuit protection assembly; 51. First magnetic conductive element; 511. First magnetic conductive body; 512. First extension; 52. Second magnetic conductive element; 521. Second magnetic conductive body; 5211. Magnetic conductive body; 522. Second extension; 6. Limiting element; 61. First limiting plate; 611. Clearance hole; 62. Second limiting plate; 7. Pushing element; 71. Push rod; 72. Elastic element; 73. Base; 8. Static contact; 9. Seat; 100a. Gap. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See Figure 1 , Figure 1 The diagram shows a cross-sectional view of a relay according to some embodiments of this application. One embodiment of the relay provided in this application includes a housing 2, a stationary contact 8, a moving contact 4, a short-circuit protection component 5, and a drive component. (In conjunction with...) Figure 4 , Figure 4Partial cross-sectional views of a relay according to some embodiments of this application are shown. The housing 2 is an insulator; in this embodiment, the housing 2 is a plastic housing. A receiving space 213 is provided inside the housing 2. In this example, the stationary contact 8 is fixed relative to the housing 2, and one end of the stationary contact 8 is disposed in the receiving space 213 of the housing 2. At least a portion of the moving contact 4 is disposed in the receiving space 213. In this embodiment, the entire moving contact 4 is disposed in the receiving space 213 of the housing 2. Of course, in other embodiments, only a portion of the moving contact 4 may be disposed in the receiving space 213 of the housing 2. The moving contact 4 is movable relative to the stationary contact 8 within the receiving space 213 of the housing 2, so that the moving contact 4 can contact or separate from the stationary contact 8. It should be noted that the contact between the moving contact 4 and the stationary contact 8 can be direct or indirect. For example, the moving contact 4 can indirectly contact the stationary contact 8 through a conductive element. In this case, when the moving contact 4 and the stationary contact 8 are in contact and the relay is connected to the load circuit, current flows between the stationary contact 8 and the moving contact 4. A portion of the pushing component is disposed within the receiving space 213 of the housing 2. The portion of the pushing component located in the receiving space 213 is connected to the moving contact 4. The pushing component is used to push the moving contact 4 to move within the receiving space 213, allowing the moving contact 4 to move relative to the stationary contact 8 within the receiving space 213, so that the moving contact 4 can contact or separate from the stationary contact 8. The short-circuit protection component 5 includes a first magnetic conductive element 51, located on the side of the moving contact 4 facing the stationary contact 8, and at least a portion of the first magnetic conductive element 51 is disposed outside the housing 2. It should be noted that, in this application, the outside of the housing 2 refers to the side of the housing 2 facing away from the receiving space 213. In this embodiment, there are two stationary contacts 8, spaced apart along the length direction of the moving contact 4. The two ends of the moving contact 4 in the length direction can respectively contact or separate from the two stationary contacts 8 in a one-to-one correspondence. When the two ends of the moving contact 4 along its length are in contact with the two stationary contacts 8 respectively, current flows through the moving contact 4, thus forming a magnetic circuit around the moving contact 4. Of course, in other examples, the two stationary contacts 8 can also be arranged to be spaced apart along the width direction of the moving contact 4, and correspondingly, the two ends of the moving contact 4 along its width direction are in contact with or separated from the two stationary contacts 8 respectively. Due to the presence of the first magnetic conductor 51, most of the magnetic field of the magnetic circuit will be concentrated on the first magnetic conductor 51 and magnetize the first magnetic conductor 51, thereby generating a magnetic attraction force along the contact pressure direction between the first magnetic conductor 51 and the moving contact 4 through which the current flows. This magnetic attraction force can resist the electrodynamic repulsion force generated between the moving contact 4 and the stationary contacts 8 due to the short-circuit current, reducing the risk of the moving contact 4 and the stationary contacts 8 springing apart.

[0047] In this type of relay, at least a portion of the first magnetic conductor 51 of the short-circuit protection component 5 is disposed outside the housing 2. On the one hand, the first magnetic conductor 51 can be installed outside the housing 2, and the space outside the housing 2 is relatively large, which facilitates the installation of the first magnetic conductor 51 of the short-circuit protection component 5 and reduces the installation difficulty of the first magnetic conductor 51. On the other hand, it reduces the space occupied by the first magnetic conductor 51 inside the housing 2, which is beneficial to the arrangement of other components inside the housing 2.

[0048] In some embodiments, see Figure 1 and Figure 4 The relay also includes a housing 1 and a sealant layer 3. The housing 1 has an internal cavity, and a cover 2 is disposed within the cavity of the housing 1. At least a portion of the housing 1 is spaced apart from the cover 2. The sealant layer 3 is disposed between the housing 1 and the cover 2, and is bonded to the first magnetic conductive element 51. It is understood that to achieve a seal for the relay, sealant, such as epoxy sealant, is injected into the gap between the housing 1 and the cover 2. The sealant cures to form the sealant layer 3, which, under its sealing effect, makes the relay form a sealed structure. The housing 1 primarily provides protection for the relay, preventing external dust and other foreign objects, as well as water, from entering the relay and affecting its normal operation. The sealant layer 3 is bonded to the first magnetic conductive element 51, fixing the first magnetic conductive element 51 to the cover 2 and preventing the first magnetic conductive element 51 from moving relative to the cover 2. In actual implementation, the first magnetic conductive element 51 can be pre-fixed to the cover 2, forming an assembly with the cover 2. This assembly is then assembled with the outer shell 1. Sealant is then injected between the outer shell 1 and the cover 2. After curing, the sealant layer 3 forms, bonding to the outer shell 1, the cover 2, and the first magnetic conductive element 51 simultaneously. Because the sealant layer 3 is bonded to the first magnetic conductive element 51, the first magnetic conductive element 51 is fixed to the cover 2 during sealant curing, eliminating the need for additional steps to fix the first magnetic conductive element 51. This facilitates the installation of the short-circuit protection component 5 and reduces the relay assembly process, which is beneficial for relay production and reduces manufacturing costs.

[0049] To facilitate the mounting of the first magnetic conductive element 51 on the side of the cover 2 facing the outer shell 1, in some embodiments, see [reference needed]. Figure 2 The cover 2 is provided with a mounting groove 212 on the side facing the outer shell 1. At least part of the first magnetic conductive element 51 is disposed in the mounting groove 212. By providing the mounting groove 212 on the cover 2, the mounting position of the first magnetic conductive element 51 can be positioned by using the mounting groove 212.

[0050] For example, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4The depth of the mounting groove 212 is greater than the thickness of the first magnetic conductive element 51, and a portion of the sealant layer 3 extends into the interior of the mounting groove 212 and contacts the first magnetic conductive element 51. By setting the depth of the mounting groove 212 to be greater than the thickness of the first magnetic conductive element 51, after the first magnetic conductive element 51 is placed in the mounting groove 212, space can be reserved in the mounting groove 212 to accommodate the sealant layer 3, allowing a portion of the sealant layer 3 to extend into the interior of the mounting groove 212 and contact the first magnetic conductive element 51, thereby facilitating the fixation of the first magnetic conductive element 51.

[0051] Further, see Figure 4 and Figure 5 The mounting groove 212 has a groove sidewall 211 including a first sidewall 211a and a second sidewall 211b. The first sidewall 211a is closer to the groove opening of the mounting groove 212 than the second sidewall 211b. Along the groove opening towards the bottom of the groove 212, the first sidewall 211a gradually slopes inward towards the inside of the mounting groove 212. The second sidewall 211b connects the first sidewall 211a and the bottom of the mounting groove 212, and abuts against the first magnetic conductor 51. The first magnetic conductor 51 abuts against the bottom of the mounting groove 212. The inclined first sidewall 211a guides the first magnetic conductor 51 during the assembly of the first magnetic conductor 51 into the cover 2, which facilitates placing the first magnetic conductor 51 at the bottom of the mounting groove 212. In actual implementation, after the first magnetic conductive element 51 is installed into the mounting groove 212, the relay needs to be moved to another station before the sealant is poured between the cover 2 and the outer shell 1. In this embodiment, the second sidewall 211b is set to abut against the first magnetic conductive element 51, so that the first magnetic conductive element 51 is pre-fixed in the mounting groove 212. This allows the second sidewall 211b to provide a certain pre-tightening force to the first magnetic conductive element 51, reducing the risk of the first magnetic conductive element 51 shifting relative to the cover 2 during transfer, and facilitating the accurate installation of the first magnetic conductive element 51.

[0052] In this example, the second sidewall 211b is perpendicular to the bottom of the mounting groove 212. The sidewall 211 of the mounting groove 212 also includes a third sidewall 211c parallel to the second sidewall 211b. The third sidewall 211c is located at the end of the first sidewall 211a away from the second sidewall 211b. In this way, the overall depth of the mounting groove 212 can be increased by the third sidewall 211c, so that the mounting groove 212 can accommodate more sealant. Furthermore, the third sidewall 211c can be angled with the second sidewall 211b, which is beneficial to the adhesion of the sealant layer 3 to the cover 2 and reduces the risk of the sealant layer 3 falling off the cover 2.

[0053] For other examples, see Figure 3Alternatively, the sidewall 211 of the mounting groove 212 can be set to be a flat structure. Furthermore, a gap can be maintained between the sidewall 211 and the first magnetic conductive element 51 as needed, so that part of the sealant layer 3 extends into this gap, thereby increasing the contact area between the sealant layer 3 and the first magnetic conductive element 51.

[0054] In some embodiments, see Figure 1 , Figure 4 , Figure 9 and Figure 10 The short-circuit protection component 5 also includes a second magnetic conductor 52 connected to the moving contact 4. At least a portion of the second magnetic conductor 52 is disposed on the side of the moving contact 4 facing away from the first magnetic conductor 51. When the moving contact 4 is subjected to a large fault current, the second magnetic conductor 52 can generate a magnetic attraction force with the first magnetic conductor 51 to resist the electro-repulsive force between the moving contact 4 and the stationary contact 8. The second magnetic conductor 52 moves synchronously with the moving contact 4. When the moving contact 4 contacts the stationary contact 8, the second magnetic conductor 52, which moves together with the moving contact 4, approaches or contacts the first magnetic conductor 51, thereby forming a magnetic circuit surrounding the moving contact 4 between the first magnetic conductor 51 and the second magnetic conductor 52. When the moving contact 4 is subjected to a large fault current, a magnetic attraction force is generated between the first magnetic conductor 51 and the second magnetic conductor 52. This magnetic attraction force can resist the electro-repulsive force generated between the moving contact 4 and the stationary contact 8 due to the large fault current, thereby further reducing the risk of the moving contact 4 and the stationary contact 8 being bounced apart.

[0055] See Figure 8 and Figure 9 The cover 2 has a through hole that extends through both the interior and exterior of the cover 2. A portion of the first magnetic conductive element 51 passes through the through hole and extends into the receiving space 213 of the cover 2. It is understood that the relay's pushing assembly pushes the moving contact 4 towards the stationary contact 8, allowing the moving contact 4 to contact the stationary contact 8; conversely, the relay's pushing assembly pushes the moving contact 4 away from the stationary contact 8, allowing the moving contact 4 to separate from the stationary contact 8. In this embodiment, the portion of the first magnetic conductive element 51 passes through the through hole and extends into the receiving space 213. When the moving contact 4 contacts the stationary contact 8, the distance between the first magnetic conductive element 51 and the moving contact 4 can be reduced, thereby increasing the magnetic attraction between the first magnetic conductive element 51 and the second magnetic conductive element 52, further reducing the risk of the moving contact 4 being pushed away from the stationary contact 8. (See also...) Figure 7 and Figure 10 , Figure 7 The first magnetic conductor 51 shown extends into the receiving space 213, and when the moving contact 4 contacts the stationary contact 8... Figure 10As shown, part of the cover 2 of the first magnetic conductive element 51 extends into the receiving space 213. It can be seen that when part of the cover 2 of the first magnetic conductive element 51 extends into the receiving space 213, the gap 100a between the first magnetic conductive element 51 and the second magnetic conductive element 52 is smaller when the moving contact 4 contacts the stationary contact 8. The reduction of the gap 100a between the first magnetic conductive element 51 and the second magnetic conductive element 52 is beneficial to increasing the attraction force of the first magnetic conductive element 51 on the second magnetic conductive element 52.

[0056] It should be noted that, in this application, the interior of the cover 2 should be understood as the side of the cover 2 facing the receiving space 213; the exterior of the cover 2 should be understood as the side of the cover 2 facing away from the receiving space 213.

[0057] Further, see Figure 7 , Figure 8 , Figure 9 and Figure 10 The first magnetically conductive component 51 includes a first magnetically conductive body 511 and two first extensions 512. Each first extension 512 is located on the first magnetically conductive body 511 and is spaced apart. The first extensions 512 form an angle with the first magnetically conductive body 511. The first magnetically conductive body 511 is located on the side of the cover 2 facing the outer shell 1. Two through holes are provided, and each first extension 512 corresponds to one of the through holes, being inserted into its corresponding through hole. In this example, the two first extensions 512 are respectively located at both ends of the length direction of the first magnetically conductive body 511, and both first extensions 512 are perpendicular to the first magnetically conductive body 511, i.e., the angle between the first extensions 512 and the first magnetically conductive body 511 is 90°. However, in other examples, the angle between the first extensions 512 and the first magnetically conductive body 511 can be adjusted as needed, for example, by setting the angle between the first extensions 512 and the first magnetically conductive body 511 to 30° or 60°. The two first extensions 512 are connected to the first magnetic conductive body 511, which can improve the stability of the first magnetic conductive body 511 on the cover 2. Since the two first extensions 512 extend into the receiving space 213, when the current passes through the moving contact 4, the distance between the two ends of the length of the first magnetic conductive member 51 and the second magnetic conductive member 52 is reduced as a whole. This helps to keep the gap 100a between the first magnetic conductive member 51 and the second magnetic conductive member 52 uniform and avoids the short-circuit protection effect due to the inconsistency of the gap 100a.

[0058] It should be noted that the number of the first extension 512 can be set as needed, for example, the number of the first extension 512 can be set to one, three or four, etc., and the number of through holes can be flexibly adjusted according to the number of the first extension 512, so that the first extension 512 and the through holes correspond one-to-one.

[0059] In actual implementation, the opposite ends of the first magnetic conductive element 51 are bent toward the inside of the cover 2 to form first extensions 512. The part of the first magnetic conductive element 51 located between the two first extensions 512 is the first magnetic conductive body 511. Since the first magnetic conductive element 51 has a certain thickness, if the first extensions 512 are too short, it will increase the difficulty of bending. If the first extensions 512 are too long, it will extend the length of the first extensions 512 into the receiving space 213, which may cause the first extensions 512 to interfere with the position of the second magnetic conductive element 52. In one example, the cover 2 includes a cover body 21 and a protrusion 22 connected to the cover body 21. The receiving space 213 is located inside the cover body 21. The protrusion 22 protrudes from the side of the cover body 21 facing the outer shell 1, that is, the protrusion 22 protrudes from the side of the cover 2 facing away from the receiving space 213. The protrusion 22 supports the first magnetic conductive body 511. The protrusion 22 supports the first magnetic conductive body 511, raising the first magnetic conductive body 511 and preventing the first extension 512 from being too short and difficult to bend, thus reducing the processing difficulty of the first magnetic conductive part 51. Furthermore, by raising the first magnetic conductive body 511 through the protrusion 22, the length of the first extension 512 extending into the receiving space 213 is reduced, thereby ensuring the gap 100a between the first magnetic conductive part 51 and the second magnetic conductive part 52.

[0060] In one example, there are at least two protrusions 22, which are spaced apart. The number of protrusions 22 can be two, three, four, five, or six, etc. Understandably, when the cover 2 is made of plastic, the flatness of the plastic cover 2 is difficult to control. By providing at least two protrusions 22 to jointly support the first magnetic conductive body 511, the assembly level of the first magnetic conductive body 511 can be adjusted by adjusting the height of the protrusions 22 from the cover body 21, thereby facilitating the horizontal installation of the first magnetic conductive component 51 in the mounting groove 212.

[0061] It should be noted that in actual implementation, only one protrusion 22 may be set, and the number of protrusions 22 is specifically limited here.

[0062] See Figure 1 and Figure 4 In some embodiments, the relay also includes a base 9. The cover 2 includes a cover body 21 and a protrusion 22. The cover body 21 has an internal receiving space 213. A sealant layer 3 is provided between the cover body 21 and the outer shell 1. An opening is provided at the end of the cover body 21 facing away from the sealant layer 3, and the opening communicates with the receiving space 213. The base 9 is provided at the end of the cover body 21 with the opening. One end of the stationary contact 8 passes through the cover body 21 and extends into the receiving space 213. The first magnetic conductor 51 is provided on the side of the cover body 21 facing the outer shell 1.

[0063] See Figure 6 and Figure 7The second magnetic conductive element 52 includes a second magnetic conductive body 521 and a second extension 522 connected to the second magnetic conductive body 521. The second magnetic conductive body 521 is disposed on the side of the movable contact 4 facing away from the first magnetic conductive element 51. One end of the second extension 522 is connected to the second magnetic conductive body 521, and the other end extends toward the first magnetic conductive element 51. This design helps to reduce the distance between the first magnetic conductive element 51 and the second magnetic conductive element 52. When current flows through the movable contact 4, the distance between the first magnetic conductive element 51 and the second magnetic conductive element 52 is reduced, further increasing the magnetic attraction between the first magnetic conductive element 51 and the second magnetic conductive element 52.

[0064] Furthermore, one end of the second extension 522, away from the second magnetically conductive body 521, protrudes from the side of the moving contact 4 facing the first magnetically conductive member 51. By having part of the second extension 522 protrude from the side of the moving contact 4 facing the first magnetically conductive member 51, the distance between the second magnetically conductive member 52 and the first magnetically conductive member 51 can be further reduced when the moving contact 4 contacts the stationary contact 8. When current flows through the moving contact 4, the magnetic attraction between the first magnetically conductive member 51 and the second magnetically conductive member 52 is further increased.

[0065] See Figure 6 , Figure 7 and Figure 10 The pushing assembly includes a pushing member 7 connected to the movable contact 4 and a limiting member 6 disposed between the pushing member 7 and the first magnetic conductive member 51. The limiting member 6 includes a first limiting plate 61 and a second limiting plate 62. The first limiting plate 61 is spaced apart from the pushing member 7 and is closer to the first magnetic conductive member 51. The second limiting plate 62 is connected between the first limiting plate 61 and the pushing member 7. The movable contact 4 and the second magnetic conductive body 521 are both disposed on the side of the first limiting plate 61 facing away from the first magnetic conductive member 51, and the second magnetic conductive body 521 is disposed on the side of the movable contact 4 facing away from the first limiting plate 61. The end of the second extension 522 away from the second magnetic conductive body 521 protrudes from the side of the first limiting plate 61 facing away from the movable contact 4. Since the movable contact 4 and the second limiting plate 62 are both connected to the pushing member 7, the movable contact 4 and the limiting member 6 can move when the pushing member 7 applies a pushing force.

[0066] To maximize the attraction between the first magnetic element 51 and the second magnetic element 52 as quickly as possible, the end of the second extension 522 away from the second magnetic body 521 protrudes from the side of the first limiting plate 61 facing the first magnetic element 51. See one example. Figure 6 and Figure 7 The first limiting plate 61 is provided with a clearance hole 611, and the second extension 522 passes through the clearance hole 611, so as to avoid the first limiting plate 61 from interfering with the position of the second extension 522.

[0067] In this example, two second limiting plates 62 are provided, and the two second limiting plates 62 are arranged opposite to each other and in parallel. The first limiting plate 61 and the two limiting plates form a U-shaped limiting member 6.

[0068] See Figure 4 , Figure 7 and Figure 8 The second magnetically conductive body 521 includes a magnetically conductive body 5211 and a first connecting member disposed on the magnetically conductive body 5211. The moving contact 4 includes a moving contact body 41 and a second connecting member disposed on the moving contact body 41. The moving contact body 41 is used to contact the stationary contact 8. One of the first connecting member and the second connecting member is a riveting post 42, and the other is provided with a fixing hole. The first connecting member and the second connecting member are riveted together. In this example, the first connecting member is integrally formed with the magnetically conductive body 5211. The first connecting member is provided with a fixing hole, and the second connecting member is a riveting post 42. Through the cooperation of the riveting post 42 and the fixing hole, the second magnetically conductive body 521 and the moving contact 4 can be firmly connected, preventing the moving contact 4 from loosening from the second magnetically conductive body 521 during movement, which would affect the normal use of the relay.

[0069] See Figure 6 , Figure 7 and Figure 9 The pushing component 7 includes a pushing rod 71, a base 73, and an elastic component 72. One end of the base 73 and the pushing rod 71 can be integrally injection molded. The ends of the two second limiting plates 62 away from the first limiting plate 61 are fixedly connected to the base 73. The limiting component 6 and the base 73 form a frame structure. The moving contact 4 and the elastic component 72 are installed within the frame structure formed by the limiting component 6 and the base 73. One end of the elastic component 72 abuts against the base 73, and the other end abuts against the moving contact 4. The elastic component 72 can provide elastic force to the moving contact 4, causing the moving contact 4 to tend to move away from the base 73 and closer to the stationary contact 8.

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

Claims

1. A relay characterized by comprising: include: Cover; A stationary contact element, one end of which is disposed inside the cover; A movable contact, at least a portion of which is disposed inside the housing and movable relative to the stationary contact within the housing, such that the movable contact can contact or separate from the stationary contact; and A first magnetic conductive element is located on the side of the moving contact facing the stationary contact, and at least a portion of the first magnetic conductive element is disposed outside the cover.

2. The relay according to claim 1, characterized in that The stationary contact has two components, which are spaced apart. The two ends of the moving contact can respectively contact or separate from the two stationary contacts.

3. The relay of claim 1, wherein It also includes a housing and a sealant layer, the housing being disposed outside the cover, at least a portion of the housing being spaced apart from the cover, and the sealant layer being disposed between the housing and the cover, and the sealant layer being bonded to the first magnetic conductive element.

4. The relay according to claim 3, characterized in that The cover has a mounting groove on the side facing the outer shell, and at least a portion of the first magnetic conductive element is disposed in the mounting groove.

5. The relay of claim 4, wherein The depth of the mounting groove is greater than the thickness of the first magnetic conductive element, and a portion of the sealant layer extends into the interior of the mounting groove and contacts the first magnetic conductive element.

6. The relay according to claim 5, characterized in that The mounting groove has a first sidewall and a second sidewall. The first sidewall is close to the opening of the mounting groove relative to the second sidewall. Along the opening of the mounting groove toward the bottom of the groove, the first sidewall gradually slopes toward the interior of the mounting groove. The second sidewall is connected between the first sidewall and the bottom of the mounting groove. The second sidewall abuts against the first magnetic conductor, and the first magnetic conductor abuts against the bottom of the mounting groove.

7. The relay according to claim 6, characterized in that The second sidewall is perpendicular to the bottom of the mounting groove. The mounting groove also includes a third sidewall parallel to the second sidewall, which is located at the end of the first sidewall away from the second sidewall.

8. The relay of claim 3, wherein The cover is provided with a through hole that extends through the inside and outside of the cover, and a portion of the first magnetic conductive element passes through the through hole and extends into the inside of the cover.

9. The relay of claim 8, wherein The first magnetic conductive component includes a first magnetic conductive body and two first extensions. The two first extensions are connected to the first magnetic conductive body and are spaced apart. The first magnetic conductive body is disposed on the side of the cover facing the outer shell. There are two through holes. The first extensions correspond one-to-one with the through holes and are inserted into the corresponding through holes.

10. The relay of claim 9, wherein The cover includes a cover body and a protrusion connected to the cover body. The movable contact is disposed inside the cover body. The protrusion protrudes from the cover body on the side facing the outer shell and supports the first magnetic conductive body.

11. The relay according to claim 10, characterized in that The protrusion has at least two parts, and the at least two protrusions are spaced apart.

12. The relay according to any one of claims 1 to 11, characterized in that It also includes a second magnetic conductor, at least a portion of which is disposed on the side of the moving contact opposite to the first magnetic conductor. When the moving contact is subjected to a fault current, the second magnetic conductor can generate a magnetic attraction force with the first magnetic conductor to resist the electrodynamic repulsion force between the moving contact and the stationary contact.

13. The relay of claim 12, wherein, The second magnetic conducting member comprises a second magnetic conducting body and a second extending part, the second magnetic conducting body is arranged on the side of the movable contact away from the first magnetic conducting member, one end of the second extending part is connected with the second magnetic conducting body, and the other end extends towards the first magnetic conducting member.

14. The relay of claim 13, wherein, The end of the second extending part away from the second magnetic conducting body protrudes from the side of the movable contact towards the first magnetic conducting member.

15. The relay of claim 14, wherein The push assembly comprises a pushing member connected with the movable contact and a limiting member arranged between the pushing member and the first magnetic conducting member, the limiting member comprises a first limiting plate and a second limiting plate, the first limiting plate is spaced apart from the pushing member, and the first limiting plate is close to the first magnetic conducting member, the second limiting plate is connected between the first limiting plate and the pushing member, the movable contact and the second magnetic conducting body are both located on the side of the first limiting plate away from the first magnetic conducting member, the second magnetic conducting body is arranged on the side of the movable contact away from the first limiting plate, and the end of the second extending part away from the second magnetic conducting body protrudes from the side of the first limiting plate away from the movable contact.

16. The relay of claim 15, wherein, The first limiting plate is provided with an avoiding hole, and the second extending part penetrates through the avoiding hole.

17. The relay of claim 13, wherein The second magnetic conducting body comprises a magnetic conducting body and a first connecting member arranged on the magnetic conducting body, the movable contact comprises a movable contact body and a second connecting member arranged on the movable contact body, the movable contact body is used for contacting the stationary contact, one of the first connecting member and the second connecting member is a riveting column, and the other is provided with a riveting hole, and the first connecting member and the second connecting member are riveted.

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