relay

Abstract

This application relates to a relay comprising a stationary contact, a moving contact, an arc-extinguishing mechanism, and a first magnetic conductor. The arc-extinguishing mechanism includes two sets of permanent magnets spaced apart along the length of the moving contact, each set corresponding to one of the two stationary contacts. Each set of permanent magnets includes a first permanent magnet and a second permanent magnet spaced apart from the first permanent magnet. Corresponding stationary contacts are disposed between the first and second permanent magnets in the same set of permanent magnets. The first permanent magnets in the two sets of permanent magnets are spaced apart on opposite sides of the moving contact along its length, and the second permanent magnets in the two sets of permanent magnets are disposed between the first permanent magnets in the two sets of permanent magnets. For the same set of permanent magnets, the polarity of the first permanent magnet facing the corresponding stationary contact is opposite to the polarity of the second permanent magnet facing the corresponding stationary contact. Along the length of the moving contact, the first magnetic conductor is disposed between the second permanent magnets in the two sets of permanent magnets. This relay has good arc-extinguishing capability.

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. During operation, relays are prone to arcing at the contact point between the moving and stationary contacts. The high temperature generated by this arc can easily damage the internal components of the relay.

[0003] Some relays include a moving contact, a stationary contact, and an arc-extinguishing assembly. The moving contact is used to make contact with or separate from the stationary contact, and the arc-extinguishing assembly is used to extinguish the arc between the moving contact and the stationary contact.

[0004] However, the arc-extinguishing components in the relays of related technologies have poor arc-extinguishing capabilities, making it difficult to meet the application requirements. Utility Model Content

[0005] Therefore, it is necessary to provide a relay with good arc extinguishing capability to address the above problems.

[0006] A relay is provided, comprising:

[0007] The stationary contact has two stationary contacts, which are spaced apart.

[0008] The moving contact has two ends along its length that can respectively contact or separate from the two stationary contacts;

[0009] An arc-extinguishing mechanism includes two sets of permanent magnet groups spaced apart along the length of the moving contact. Each set of permanent magnet groups corresponds to one of the two stationary contacts. Each set of permanent magnet groups includes a first permanent magnet and a second permanent magnet spaced apart from the first permanent magnet. A corresponding stationary contact is provided between the first permanent magnet and the second permanent magnet in the same set of permanent magnet groups. The first permanent magnets in the two sets of permanent magnet groups are spaced apart on opposite sides of the moving contact in the length direction. The second permanent magnets in the two sets of permanent magnet groups are all provided between the first permanent magnets in the two sets of permanent magnet groups. For the same set of permanent magnet groups, the polarity of the first permanent magnet facing the corresponding stationary contact is opposite to the polarity of the second permanent magnet facing the corresponding stationary contact.

[0010] A first magnetic conductor is disposed between the second permanent magnets in the two sets of permanent magnet groups, along the length direction of the moving contact.

[0011] In this type of relay, corresponding stationary contacts are positioned between the first and second permanent magnets in the same set of permanent magnets. The polarities of the side of the first permanent magnet facing the corresponding stationary contact are opposite to those of the side of the second permanent magnet facing the corresponding stationary contact. The magnetic field of the first permanent magnet attracts the magnetic field of the second permanent magnet, allowing some of the magnetic lines of force from both magnets to pass through the contact point between the stationary and moving contacts. This effectively extinguishes arcing at the contact point using the magnetic field. Furthermore, because the first magnetic conductor attracts the magnetic lines of force from the first permanent magnet, and is positioned between the second permanent magnets in the two sets of permanent magnets, the first magnetic conductor causes more of the magnetic lines of force from the first permanent magnet to move towards the second permanent magnet. This allows more magnetic lines of force to pass through the contact point between the stationary and moving contacts, increasing the magnetic field strength at the arcing point and effectively improving the arc-extinguishing capability.

[0012] In one embodiment, when the moving contact contacts the stationary contact, the projection of the second permanent magnet on a set plane at least partially overlaps with the projection of the first magnetically conductive element on the set plane, and the set plane is perpendicular to the length direction of the moving contact. Therefore, when the moving contact contacts the stationary contact, it is ensured that the first magnetically conductive element can attract magnetic lines of force towards the second permanent magnet, thereby ensuring that more magnetic lines of force pass through the contact point between the stationary contact and the moving contact, thus guaranteeing arc extinguishing capability.

[0013] In one embodiment, the device further includes a housing with an internal receiving space. The moving contact is disposed within the receiving space, and one end of the stationary contact protrudes outside the housing, while the other end passes through the housing and extends into the receiving space. The exposed end of the stationary contact is used for electrical connection to a load circuit, and the end extending into the receiving space is used for contacting the moving contact. Thus, the receiving space inside the housing provides space for the arrangement of the moving contact, and the housing provides support for the stationary contact.

[0014] In one embodiment, at least a portion of the second permanent magnet is disposed on the side of the cover facing away from the receiving space. Thus, the cover can shield at least a portion of the second permanent magnet, reducing the impact of high temperatures in the receiving space on the second permanent magnet and thereby protecting it.

[0015] And / or, at least a portion of the first magnetic conductive element is disposed on the side of the cover facing away from the receiving space. Thus, the cover can shield at least a portion of the first magnetic conductive element, reducing the impact of high temperatures inside the cover on the first magnetic conductive element and thereby protecting it.

[0016] In one embodiment, the second permanent magnet is disposed on the side of the cover facing the receiving space;

[0017] And / or, the first magnetic conductor is disposed on the side of the cover facing the receiving space.

[0018] In one embodiment, the first magnetic conductive element is disposed on the cover;

[0019] And / or, the first permanent magnet is disposed on the cover;

[0020] And / or, the second permanent magnet is disposed on the cover.

[0021] In one embodiment, the cover body is provided with a first mounting groove and a second mounting groove on the side facing away from the accommodating space. There are two second mounting grooves. The first mounting groove is located between the two second mounting grooves. At least a portion of the first magnetic conductive element is disposed in the first mounting groove. The second permanent magnet corresponds to the second mounting groove one by one. At least a portion of the second permanent magnet is disposed in the corresponding second mounting groove.

[0022] In one embodiment, the cover is provided with a through hole that connects the first mounting groove and the receiving space, and a portion of the first magnetic conductor passes through the through hole and extends into the receiving space.

[0023] In one embodiment, the cover includes a cover body and two bosses, each disposed on the cover body. The cover body has an internal receiving space. The two bosses are spaced apart along the length of the movable contact member. Each boss protrudes from the side of the cover body facing the receiving space. A through hole is partially provided on the cover body between the two bosses. At least one end of the first magnetic conductive member passes through the through hole and extends into the receiving space. A second mounting groove is provided in each boss. Thus, a mounting groove is provided on the side of the cover body facing away from the cover body, facilitating the installation of the first magnetic conductive member and the second permanent magnet.

[0024] In one embodiment, the cover further includes a protrusion connected to the cover body, the protrusion protruding from the side of the cover body opposite to the receiving space, the protrusion supporting the first magnetic conductor.

[0025] In one embodiment, the device further includes a housing and a sealant layer. The housing has an internal cavity, and the cover is disposed in the cavity, with at least a portion of the cover spaced apart from the housing. The sealant layer is disposed between the housing and the cover, and a portion of the sealant layer extends into the first mounting groove and is bonded to the first magnetic conductor. One end of the stationary contact is exposed outside the housing, and the other end passes through the housing, the sealant layer, and the cover in sequence and extends into the receiving space.

[0026] In one embodiment, the first permanent magnets in the two sets of permanent magnet groups are respectively disposed on the sidewalls of the cover opposite to each other in the length direction of the moving contact.

[0027] In one embodiment, the sidewall of the cover is provided with two mounting cavities, the two mounting cavities are distributed at intervals along the length direction of the moving contact, and the moving contact is disposed at intervals between the two mounting cavities. The first permanent magnet corresponds to each mounting cavity, and the first permanent magnet is installed in the corresponding mounting cavity.

[0028] In one embodiment, a second magnetic conductor is further included, at least a portion of which is disposed on the side of the movable contact opposite to the first magnetic conductor. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of a relay in some embodiments of this application (when the two ends of the moving contact in the length direction are in contact with the stationary contact one by one).

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 This is a cross-sectional view of a relay in some embodiments of this application (when the two ends of the moving contact are separated from the stationary contact in a one-to-one correspondence along the length of the moving contact).

[0032] Figure 4 This is a structural diagram of the moving contact, the pushing mechanism, and the second magnetic conductor in some embodiments of this application.

[0033] Figure 5 This is a cross-sectional view of the first magnetic conductive element and the cover in some embodiments of this application.

[0034] Figure 6 for Figure 3 Enlarged view of point B in the middle.

[0035] Figure 7 This is an exploded view of the first magnetic conductive element and the cover in some embodiments of this application.

[0036] In the picture:

[0037] 1. Stationary contact; 2. Moving contact; 21. Moving contact body; 22. Riveting protrusion; 3. Pushing mechanism; 31. U-shaped bracket; 311. Clearance hole; 32. Push rod; 33. First elastic element; 34. Base; 4. Arc extinguishing mechanism; 41. First permanent magnet; 42. Second permanent magnet; 5. Short circuit protection mechanism; 51. First magnetic conductive element; 511. First magnetic conductive body; 512. First extension; 52. Second magnetic conductive element; 521. Second magnetic conductive body 522. Second extension; 6. Cover; 61. Cover body; 611. First mounting groove; 612. Through hole; 62. Boss; 621. Second mounting groove; 63. Protrusion; 7. Outer shell; 8. Sealing layer; 9. Magnetic circuit mechanism; 91. Moving iron core; 92. Second elastic element; 93. Magnetic guide cylinder; 94. Electromagnetic coil; 95. Second magnetic guide cup; 10. First magnetic guide cup; 11. Base; 100. Accommodation space; 200. Cavity. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 The diagram shows a cross-sectional view of a relay in some embodiments of this application (with the two ends of the moving contact in the length direction respectively in contact with the stationary contact). Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 The diagram shows a cross-sectional view of a relay in some embodiments of this application (when the two ends of the moving contact are separated from the stationary contact in a one-to-one correspondence along the length of the moving contact). Figure 4This application shows structural diagrams of a moving contact, a pushing mechanism, and a second magnetic conductor in some embodiments. One embodiment of this application provides a relay including a stationary contact 1, a moving contact 2, a pushing mechanism 3, an arc-extinguishing mechanism 4, and a first magnetic conductor 51. There are two stationary contacts 1, spaced apart. The two ends of the moving contact 2 along its length can respectively contact or separate from the two stationary contacts 1. It should be noted that in this application, "the length direction of the moving contact 2" refers to the direction from one stationary contact 1 to the other. The moving contact 2 is mounted on the pushing mechanism 3, which can push the moving contact 2 to move, so that the moving contact 2 contacts or separates from the stationary contacts 1. The arc-extinguishing mechanism 4 includes two sets of permanent magnet groups spaced apart along the length direction of the moving contact 2, each set corresponding to one of the two stationary contacts. Both permanent magnet groups include a first permanent magnet 41 and second permanent magnets 42 spaced apart from the first permanent magnet 41. Corresponding stationary contacts are provided between the first permanent magnets 41 and the second permanent magnets 42 in the same group. The first permanent magnets 41 in the two groups are respectively spaced apart on opposite sides of the moving contact 2 along its length, and the second permanent magnets 42 in the two groups are all positioned between the first permanent magnets 41 in the two groups. For the same group of permanent magnets, the polarity of the side of the first permanent magnet 41 facing the corresponding stationary contact 1 is opposite to the polarity of the side of the second permanent magnet 42 facing the corresponding stationary contact 1. In this example, for the same group of permanent magnets, the polarity of the side of the first permanent magnet 41 facing the corresponding stationary contact 1 is the S pole, and the polarity of the side of the second permanent magnet 42 facing the corresponding stationary contact 1 is the N pole. Of course, in other examples, for the same group of permanent magnets, the polarity of the first permanent magnet 41 facing the side of the corresponding stationary contact 1 can be set to N pole, and the polarity of the second permanent magnet 42 facing the side of the corresponding stationary contact 1 can be set to S pole; or, in one group of permanent magnets, the polarity of the first permanent magnet 41 facing the side of the corresponding stationary contact 1 can be set to N pole, and the polarity of the second permanent magnet 42 facing the side of the corresponding stationary contact 1 can be set to S pole, and in another group of permanent magnets, the polarity of the first permanent magnet 41 facing the side of the corresponding stationary contact 1 can be set to S pole, and the polarity of the second permanent magnet 42 facing the side of the corresponding stationary contact 1 can be set to N pole. The first magnetic conductor 51 is disposed between the second permanent magnets 42 in the two groups of permanent magnets.

[0045] Since a corresponding stationary contact 1 is provided between the first permanent magnet 41 and the second permanent magnet 42 in the same group of permanent magnets, and the polarity of the side of the same group of permanent magnets facing the corresponding stationary contact 1 is opposite to that of the side of the second permanent magnet 42 facing the corresponding stationary contact 1, the magnetic field of the first permanent magnet 41 has a magnetic attraction effect on the magnetic field of the second permanent magnet 42, so that some of the magnetic lines of force of the first permanent magnet 41 and the second permanent magnet 42 can pass through the contact position between the stationary contact 1 and the moving contact 2, thereby using the magnetic field to extinguish the arc at the contact position between the stationary contact 1 and the moving contact 2. Furthermore, since the first magnetic conductor 51 can attract the magnetic lines of force of the first permanent magnet 41, and the first magnetic conductor 51 is positioned between the second permanent magnets 42 of the two sets of permanent magnets, the magnetic lines of force of the first permanent magnet 41 can move more towards the direction of the second permanent magnet 42 under the action of the first magnetic conductor 51. This allows more magnetic lines of force to pass through the contact position between the stationary contact 1 and the moving contact 2, thereby increasing the magnetic field strength at the arc initiation point and effectively improving the arc extinguishing capability.

[0046] In one example, when the moving contact 2 contacts the stationary contact 1, the projection of the second permanent magnet 42 onto the set plane at least partially overlaps with the projection of the first magnetic conductor 51 onto the set plane. The set plane is perpendicular to the length direction of the moving contact 2. Thus, when the moving contact 2 contacts the stationary contact 1, it can be ensured that the first magnetic conductor 51 can attract magnetic lines of force towards the second permanent magnet 42, thereby ensuring that more magnetic lines of force pass through the contact position between the stationary contact 1 and the moving contact 2, ensuring arc extinguishing capability. It should be noted that the set plane in this application refers to a plane perpendicular to the length direction of the moving contact 2.

[0047] In some embodiments, see Figure 1 and Figure 3 The relay also includes a housing 6, which has an internal receiving space 100. The moving contact 2 is disposed within the receiving space 100. One end of the stationary contact 1 protrudes from the outside of the housing 6, while the other end passes through the housing 6 and extends into the receiving space 100. The end of the stationary contact 1 protruding from the outside of the housing 6 is electrically connected to the load circuit, and the end of the stationary contact 1 extending into the receiving space 100 is used to contact the moving contact 2. The housing is an insulator. In this embodiment, the housing 6 is a plastic cover, but it is not limited to this. The receiving space 100 inside the housing 6 provides space for the arrangement of the moving contact 2, and the housing 6 provides support for the stationary contact 1.

[0048] It is understandable that when the stationary contact 1 and the moving contact 2 disconnect and generate an electric arc, the high temperature generated by the electric arc in the accommodating space 100 will affect the first magnetic conductive element 51 and the second permanent magnet 42.

[0049] In one example, see Figure 1 and Figure 3At least a portion of the second permanent magnet 42 is disposed on the side of the cover 6 facing away from the receiving space 100. The cover 6 can shield at least a portion of the second permanent magnet 42, reducing the impact of the high temperature in the receiving space 100 on the second permanent magnet 42, thereby protecting it. Furthermore, in practical implementation, the receiving space 100 of the cover 6 can be filled with arc-extinguishing gas, thereby enhancing the arc-extinguishing capability of the arc-extinguishing mechanism 4. When the receiving space 100 of the cover is filled with arc-extinguishing gas, disposing at least a portion of the second permanent magnet 42 on the side of the cover 6 facing away from the receiving space 100 allows the cover 6 to isolate at least a portion of the second permanent magnet 42 from the arc-extinguishing gas, reducing the influence of the arc-extinguishing gas on the magnetism of the second permanent magnet 42.

[0050] In actual implementation, refer to Figure 3 The relay also includes a base 11, and a base 11 is provided at one end of the cover 6 so that a sealed space is formed between the base 11 and the cover 6 to prevent the arc extinguishing gas from leaking out.

[0051] In one example, see Figure 1 and Figure 3 At least a portion of the first magnetic conductive element 51 is disposed on the side of the cover 6 facing away from the receiving space 100. The cover 6 can shield at least a portion of the first magnetic conductive element 51, thereby reducing the impact of the high temperature inside the cover 6 on the first magnetic conductive element 51 and protecting the first magnetic conductive element 51.

[0052] Of course, in other examples, at least one second permanent magnet 42 may be disposed on the side of the cover 6 facing the receiving space 100. Alternatively, the first magnetic conductor 51 may be disposed on the side of the cover 6 facing the receiving space 100.

[0053] In one example, the first magnetic conductive element 51 is disposed on the cover 6, so that the cover 6 can provide support for the first magnetic conductive element 51, making it easy to install the first magnetic conductive element 51.

[0054] In one example, the first permanent magnet 41 is fixed on the cover 6, and the cover provides support for the first permanent magnet 41, making it easy to install the first permanent magnet 41.

[0055] In one example, the second permanent magnet 42 is fixed on the cover 6, and the cover provides support for the second permanent magnet 42, making it easy to install the second permanent magnet 42.

[0056] Of course, in other examples, two or three of the first magnetic conductor 51, the first permanent magnet 41 and the second permanent magnet 42 can be placed on the cover 6.

[0057] See Figure 1 , Figure 3 , Figure 6 and Figure 7With the first magnetic conductive element 51 and the two second permanent magnets 42 both disposed on the side of the cover 6 facing away from the receiving space 100, the side of the cover 6 facing away from the receiving space 100 is provided with a first mounting groove 611 and a second mounting groove 621, respectively. There are two second mounting grooves 621, with the first mounting groove 611 located between the two second mounting grooves 621. At least a portion of the first magnetic conductive element 51 is disposed in the first mounting groove 611, and the second permanent magnets 42 correspond one-to-one with the second mounting grooves 621, with at least a portion of the second permanent magnets 42 disposed in their respective second mounting grooves 621. The provision of the first mounting groove 611 and the second mounting groove 621 on the side of the cover 6 facing away from the receiving space 100 facilitates the installation of the first magnetic conductive element 51 and the second permanent magnets 42.

[0058] Continue reading Figure 1 , Figure 3 and Figure 6 The relay also includes a housing 7 and a sealant layer 8. The housing 7 is an insulator, and a cavity 200 is provided inside the housing 7. At least a portion of the cover 6 is spaced apart from the housing 7. The sealant layer 8 is disposed between the housing 7 and the cover 6, and a portion of the sealant layer 8 extends into the first mounting groove 611 and is bonded to the first magnetic conductor 51. One end of the stationary contact 1 is exposed inside the housing 7, and the other end passes through the housing 7, the sealant layer 8, and the cover 6 in sequence and extends into the receiving space 100. The housing 7 provides protection for the stationary contact, the first magnetic conductor 51, the second permanent magnet 42, and the cover 6. In actual implementation, sealant is injected between the housing 6 and the outer shell 7. The sealant cures to form a sealant layer 8. The portion of the stationary contact 1 located between the housing 6 and the outer shell 7 is bonded to the sealant layer 8. The sealant layer 8 fixes the position of the stationary contact 1 on the housing 6 and the outer shell 7, restricting its movement relative to them. Furthermore, when both the first magnetic conductor 51 and the second permanent magnet 42 are located on the side of the housing 6 facing away from the receiving space 100, the sealant layer 8 can be used to fix the first magnetic conductor 51 and the second permanent magnet 42 to the housing 6. Because the sealant layer 8 is bonded to the first magnetic conductor 51, the first magnetic conductor 51 is fixed to the housing body 61 when the sealant cures, eliminating the need for additional steps to fix the first magnetic conductor 51, thus facilitating its installation. Additionally, the presence of the sealant layer 8 seals the gap between the housing 6 and the outer shell 7, preventing external moisture from entering the housing 6 and preventing leakage of arc-extinguishing gas inside the housing 6.

[0059] In some embodiments, see Figure 1 and Figure 3The relay also includes a second magnetic element 52, at least a portion of which is disposed on the side of the moving contact 2 facing away from the first magnetic element 51. The first magnetic element 51 and the second magnetic element 52 together form an anti-short-circuit mechanism 5. When a large fault current passes through the moving contact 2, the second magnetic element 52 can generate a magnetic attraction force with the first magnetic element 51 to resist the electrodynamic repulsion force between the stationary contact 1 and the moving contact 2. The second magnetic conductor 52 moves synchronously with the moving contact 2. When the moving contact 2 contacts the stationary contact 1, the second magnetic conductor 52, which moves together with the moving contact 2, approaches or contacts the first magnetic conductor 51, thereby forming a magnetic circuit around the moving contact 2 between the first magnetic conductor 51 and the second magnetic conductor 52. When the moving contact 2 is subjected to a 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 electric repulsion force generated between the moving contact 2 and the stationary contact 1 due to the fault current, thereby further reducing the risk of the moving contact 2 and the stationary contact 1 being bounced apart.

[0060] Combination Figure 7 The cover 6 is provided with a through hole 612, which connects the first mounting groove 611 and the receiving space 100. A portion of the first magnetic conductive element 51 passes through the through hole 612 and extends into the receiving space 100. The through hole 612 allows a portion of the first magnetic conductive element 51 to extend into the receiving space 100. When the moving contact 2 contacts the stationary contact 1, the distance between the first magnetic conductive element 51 and the moving contact 2 can be reduced, thereby increasing the magnetic attraction between the first magnetic conductive element 51 and the second magnetic conductive element 52, and further reducing the risk of the moving contact 2 and the stationary contact 1 being bounced apart.

[0061] In one example, see Figure 5 and Figure 7 The first magnetic conductive element 51 includes a first magnetic conductive body 511 and two first extensions 512. The two first extensions 512 are connected to the first magnetic conductive body 511 and are spaced apart. The first magnetic conductive body 511 is located on the side of the inner support facing away from the accommodating space 100. There are two through holes 612. The first extensions 512 correspond one-to-one with the through holes 612. The first extensions 512 are inserted into the corresponding through holes 612, thereby reducing the distance between the two ends of the first magnetic conductive element 51 and the second magnetic conductive element 52.

[0062] In actual implementation, the two opposite ends of the first magnetic conductive element 51 are bent toward the inside of the cover 6 to form the first extension 512, and the part of the first magnetic conductive element 51 located between the two first extensions 512 is the first magnetic conductive body 511.

[0063] See Figure 1 , Figure 3 , Figure 6 and Figure 7The cover 6 includes a cover body 61 and two protrusions 62, both of which are provided on the cover body 61. The cover body 61 has an internal accommodating space 100. The two protrusions 62 are spaced apart along the length of the moving contact 2, protruding from the side of the cover body 61 facing the accommodating space 100. A through hole 612 is provided in the cover body 61 between the two protrusions 62. At least one end of the first magnetic conductor 51 passes through the through hole 612 and extends into the interior of the cover body 61. A second mounting groove 621 is provided inside the protrusion 62. Because the contact position of the second permanent magnet 42 with the stationary contact 1 and the moving contact 2 is relatively close, when the stationary contact 1 contacts the moving contact 2 and generates an electric arc, the arc may directly contact the second permanent magnet 42, thereby posing a risk of damage to the second permanent magnet 42. In this embodiment, the protrusion 62 protrudes from the side of the cover body 61 facing the receiving space 100. This allows the second permanent magnet 42 to be as close as possible to the contact position between the stationary contact 1 and the moving contact 2. This facilitates the magnetic lines of force of the second permanent magnet 42 passing through the contact position between the stationary contact 1 and the moving contact 2. Simultaneously, the protrusion 62 can block the electric arc, preventing the arc from directly contacting the second permanent magnet 42 and reducing the impact of the high temperature generated by the arc on the second permanent magnet 42. Furthermore, a through hole 612 is provided in the portion of the cover body 61 located between the two protrusions 62. This provides a reserved position for the first magnetic conductive element 51 to extend into the receiving space 100, preventing positional interference between the two protrusions 62 and the first magnetic conductive element 51 within the receiving space 100.

[0064] In this embodiment, a first mounting groove 611 is provided on the cover body 61 between the two protrusions 62. In this example, a through hole 612 is located at the bottom of the first mounting groove 611. A portion of the sealant layer 8 extends into the first mounting groove 611 and adheres to the first magnetic conductive element 51. The sealant layer 8 adheres to the first magnetic conductive element 51, fixing it in the first mounting groove 611 and preventing displacement. Because the sealant layer 8 adheres to the first magnetic conductive element 51, the sealant cures, fixing the first magnetic conductive element 51 to the cover body 61 without requiring additional steps to fix it. This facilitates the installation of the first magnetic conductive element 51, reduces the assembly steps of the relay, and is beneficial for relay production and manufacturing costs.

[0065] In one example, the first permanent magnet 41 of the two permanent magnet groups is respectively disposed on two opposite side walls of the cover 6 along the length of the moving contact 2. In this example, the first permanent magnet 41 of the two permanent magnet groups is respectively disposed on two opposite side walls of the cover body 61 along the length of the moving contact 2. In this way, installation space can be provided for the first permanent magnet 41 on the side walls of the cover 6, improving the structural compactness between the cover 6 and the first permanent magnet 41, which is beneficial to the optimization of the internal space of the cover 6.

[0066] Understandably, high temperatures will cause the temperature of the permanent magnet to rise. When the temperature reaches the Curie temperature point of the permanent magnet, the magnetism of the permanent magnet will decrease sharply. Moreover, the high temperature will also cause cracks or deformation of the first permanent magnet 41. In this embodiment, the cover 6 has mounting cavities on two opposite sidewalls along the length of the moving contact 2. The first permanent magnet 41 corresponds to one mounting cavity. The first permanent magnet 41 is installed in the corresponding mounting cavity. The cavity wall of the mounting cavity blocks the first permanent magnet 41, preventing the electric arc from directly contacting the first permanent magnet 41, thereby preventing the first permanent magnet 41 from being affected by the high temperature of the electric arc.

[0067] Of course, in other embodiments, a first fixing member (not shown in the figure) can be provided in the accommodating space 100 to fix the first permanent magnet 41, and a second fixing member (not shown in the figure) can be provided in the accommodating space 100 to fix the second permanent magnet 42 and the first magnetic conductive member 51.

[0068] In some embodiments, see Figure 5 and Figure 7 The cover 6 also includes a protrusion 63 connected to the cover body 61. The protrusion 63 protrudes from the side of the cover body 61 facing away from the receiving space 100 and supports the first magnetic conductive element 51. The cover body 61 is provided with a movable contact 2 inside. When the first magnetic conductive element 51 includes a first magnetic conductive body 511 and a first extension 512, the protrusion 63 supports the first magnetic conductive body 511 of the first magnetic conductive element 51. This raises the first magnetic conductive body 511, preventing the first extension 512 from being too short and difficult to bend, reducing the processing difficulty of the first magnetic conductive element 51. Furthermore, by raising the first magnetic conductive body 511 through the protrusion 63, the length of the first extension 512 extending into the receiving space 100 is reduced, thereby preventing the first magnetic conductive element 51 from interfering with the position of the second magnetic conductive element 52.

[0069] In one example, there are at least two protrusions 63, spaced apart. The number of protrusions 63 can be two, three, four, five, or six, etc. Understandably, when the cover 6 is made of plastic, the flatness of the plastic cover 6 is difficult to control. By providing at least two protrusions 63 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 63 from the cover body 61, thereby facilitating the horizontal installation of the first magnetic conductive component 51 in the first mounting groove 611.

[0070] It should be noted that in actual implementation, only one protrusion 63 may be set, and the number of protrusions 63 is specifically limited here.

[0071] In some embodiments, combined with Figure 4The pushing mechanism 3 includes a push rod 32, a base 34, a U-shaped bracket 31, and a first elastic element 33. The U-shaped bracket 31 is disposed in the receiving space 100, and the base 34 is disposed on the side of the seat 11 facing the receiving space 100. One end of the U-shaped bracket 31 is connected to the base 34, and the other end extends toward the stationary contact 1. The U-shaped bracket 31 and the base 34 form a frame structure. The moving contact 2 and the first elastic element 33 are both disposed in the frame structure. One end of the first elastic element 33 is connected to the moving contact 2, and the other end is connected to the base 34. In this example, the first elastic element 33 is a compression spring. One end of the push rod 32 is located outside the receiving space 100, and the other end passes through the seat 11 and is connected to the base 34.

[0072] See Figure 1 and Figure 3 The relay also includes a first magnetic cup 10 and a magnetic circuit mechanism 9. The first magnetic cup 10 is disposed in the cavity 200, dividing the cavity 200 into two parts. The cover 6 and the base 11 are both disposed inside the first magnetic cup 10, and the magnetic circuit mechanism 9 is disposed outside the first magnetic cup 10. The magnetic circuit mechanism 9 includes a moving iron core 91, a stationary iron core (not shown in the figure), a second elastic element 92, a magnetic cylinder 93, and an electromagnetic coil 94. The magnetic cylinder 93 is disposed around the stationary iron core, and the electromagnetic coil 94 is disposed around the magnetic cylinder 93. The moving iron core 91 moves inside the magnetic cylinder 93. The moving iron core 91 and the stationary iron core are arranged sequentially along the axial direction of the push rod 32, with the stationary iron core positioned close to the base 34. The second elastic element 92, which is a compression spring, is disposed between the stationary iron core and the moving iron core 91. The end of the push rod 32 away from the base 34 is inserted into the moving iron core 91. When the electromagnetic coil 94 is energized, it generates an electromagnetic effect. Under the influence of this effect, the stationary iron core attracts the moving iron core 91 to move upward. The moving iron core 91 drives the push rod 32 to move upward, causing the push rod 32 to move the moving contact 2 closer to the stationary contact 1, thus bringing the moving contact 2 into contact with the stationary contact 1. When the moving contact 2 contacts the stationary contact 1, it is stopped by the stationary contact 1, while the push rod 32 continues to move upward until it has completed its overtravel. After the electromagnetic coil 94 is de-energized, the moving iron core 91 returns to its original position under the action of the second elastic element 92, thereby causing the push rod 32 to descend, separating the moving contact 2 from the stationary contact 1, and breaking the circuit.

[0073] Furthermore, the magnetic circuit mechanism 9 also includes a second magnetic cup 95, and an electromagnetic coil 94 is disposed inside the second magnetic cup 95. An opening is provided through the middle of the second magnetic cup 95, and a magnetic cylinder 93 is disposed in the opening.

[0074] Combination Figure 3 and Figure 4The second magnetic conductive element 52 includes a second magnetic conductive body 521 and two second extensions 522, each angled with the second magnetic conductive body 521. The two second extensions 522 are connected to the second magnetic conductive body 521 and are spaced apart. The second magnetic conductive body 521 is disposed on the side of the movable contact 2 facing away from the first magnetic conductive element 51 and is fixed to the movable contact 2. In this example, the movable contact 2 includes a movable contact body 21 for contacting the stationary contact 1 and a riveting protrusion 22 protruding from the side of the movable contact body 21 facing away from the stationary contact 1. The second magnetic conductive body 521 is disposed on one side of the movable contact body 21 and riveted to the riveting protrusion 22. The two second extensions 522 are respectively disposed on both sides of the width direction of the movable contact 2. The end of each of the two second extensions 522 away from the second magnetic conductive body 521 protrudes from the side of the movable contact 2 facing the first magnetic conductive element 51, so as to reduce the distance between the second magnetic conductive element 52 and the first magnetic conductive element 51.

[0075] When the push mechanism 3 has a U-shaped bracket 31, the top of the U-shaped bracket 31 is provided with two clearance holes 311, which correspond one-to-one with the second extension 522. The end of the second extension 522 away from the second magnetic body 521 passes through the clearance hole 311 and extends to the side of the U-shaped bracket 31 facing the stationary contact 1, so as to be as close as possible to the first magnetic element 51.

[0076] It should be noted that in other examples, the riveting protrusion 22 can also be provided on the second magnetic conductive body 521, and the second magnetic conductive body 521 is riveted to the moving contact 2 through the riveting protrusion 22.

[0077] 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.

[0078] 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: The stationary contact has two stationary contacts, which are spaced apart. The moving contact has two ends along its length that can respectively contact or separate from the two stationary contacts; An arc-extinguishing mechanism includes two sets of permanent magnet groups spaced apart along the length of the moving contact. Each set of permanent magnet groups corresponds to one of the two stationary contacts. Each set of permanent magnet groups includes a first permanent magnet and a second permanent magnet spaced apart from the first permanent magnet. A corresponding stationary contact is provided between the first permanent magnet and the second permanent magnet in the same set of permanent magnet groups. The first permanent magnets in the two sets of permanent magnet groups are spaced apart on opposite sides of the moving contact in the length direction. The second permanent magnets in the two sets of permanent magnet groups are all provided between the first permanent magnets in the two sets of permanent magnet groups. For the same set of permanent magnet groups, the polarity of the first permanent magnet facing the corresponding stationary contact is opposite to the polarity of the second permanent magnet facing the corresponding stationary contact. A first magnetic conductor is disposed between the second permanent magnets in the two sets of permanent magnet groups, along the length direction of the moving contact.

2. The relay according to claim 1, characterized in that When the moving contact contacts the stationary contact, the projection of the second permanent magnet on the set plane at least partially overlaps with the projection of the first magnetic conductor on the set plane, and the set plane is perpendicular to the length direction of the moving contact.

3. The relay of claim 1, wherein It also includes a cover, the inside of which is provided with a receiving space, the moving contact is disposed in the receiving space, one end of the stationary contact is exposed outside the cover, and the other end passes through the cover and extends into the receiving space. The end of the stationary contact exposed outside the cover is used for electrical connection with the load circuit, and the end of the stationary contact extending into the receiving space is used for contact with the moving contact.

4. The relay according to claim 3, characterized in that At least a portion of the second permanent magnet is disposed on the side of the cover opposite to the receiving space; And / or, at least a portion of the first magnetic conductor is disposed on the side of the cover opposite to the receiving space.

5. The relay of claim 3, wherein The second permanent magnet is disposed on the side of the cover facing the receiving space; And / or, the first magnetic conductor is disposed on the side of the cover facing the receiving space.

6. The relay of claim 3, wherein The first magnetic conductive element is disposed on the cover; And / or, the first permanent magnet is disposed on the cover; And / or, the second permanent magnet is disposed on the cover.

7. The relay according to claim 6, characterized in that The cover body is provided with a first mounting groove and a second mounting groove on the side facing away from the accommodating space. There are two second mounting grooves. The first mounting groove is located between the two second mounting grooves. At least a portion of the first magnetic conductive element is disposed in the first mounting groove. The second permanent magnet corresponds to the second mounting groove one by one. At least a portion of the second permanent magnet is disposed in the corresponding second mounting groove.

8. The relay according to claim 7, characterized in that The cover is provided with a through hole, which connects the first mounting groove and the receiving space. A portion of the first magnetic conductive element passes through the through hole and extends into the receiving space.

9. The relay according to claim 8, characterized in that The cover includes a cover body and two protrusions, both of which are provided on the cover body. The cover body has an internal receiving space. The two protrusions are spaced apart along the length of the moving contact. The protrusions protrude from the side of the cover body facing the receiving space. The cover body has a through hole between the two protrusions. At least one end of the first magnetic conductive member passes through the through hole and extends into the receiving space. The protrusions have a second mounting groove.

10. The relay of claim 9, wherein The cover also includes a protrusion connected to the cover body, the protrusion protruding from the side of the cover body facing away from the receiving space, and the protrusion supporting the first magnetic conductive element.

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 of claim 7, wherein, It also includes a housing and a sealant layer. The housing has an internal cavity, and the cover is disposed in the cavity. At least a portion of the cover is spaced apart from the housing. The sealant layer is disposed between the housing and the cover, and a portion of the sealant layer extends into the first mounting groove and is bonded to the first magnetic conductive element. One end of the stationary contact is exposed outside the housing, and the other end passes through the housing, the sealant layer, and the cover in sequence and extends into the receiving space.

13. The relay of claim 3, wherein The first permanent magnets in the two sets of permanent magnet groups are respectively disposed on the side walls of the cover opposite to the moving contact in the length direction.

14. The relay of claim 3, wherein The sidewall of the cover is provided with two mounting cavities. The two mounting cavities are distributed at intervals along the length direction of the moving contact, and the moving contact is disposed at intervals between the two mounting cavities. The first permanent magnet corresponds to each mounting cavity and is installed in the corresponding mounting cavity.

15. The relay according to any one of claims 1 to 14, 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.

Images