Relay

Abstract

The utility model relates to a relay, and the outer side part of a first contact part is provided with a first protruding part which protrudes in the direction away from the central axis of a movable contact spring, and the first protruding part is in contact fit with a second contact part. Or, the outer side part of the second contact part is provided with a second protruding part protruding towards the direction far away from the central axis of the movable reed, and the second protruding part is in contact fit with the first contact part. When the first contact part and the second contact part are separated from each other or are in contact with each other to generate an electric arc, a magnetic field formed by the first permanent magnet can play a traction role on the electric arc, so that the electric arc generated by the first protruding part or the second protruding part can quickly enter surrounding air, and after the electric arc is blown out, the external magnetic field is stronger; compared with the prior art, arc blowing, arc discharge, arc isolation and arc breaking are easier to realize, good arc breaking and rapid arc extinguishing effects are achieved, the arcing time can be shortened, the defects that an inner cavity is ablated by an electric arc and a relay explodes and the like can be effectively avoided, and the product performance can still be ensured even under the condition of high load.

Description

relay 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 electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits. A high-voltage DC relay is a type of relay. A high-voltage DC relay includes a pair of stationary contacts and a moving contact. The two ends of the moving contact along its length are used to interact with the pair of stationary contacts, respectively, to connect and disconnect the load.

[0003] The principle of high voltage DC relays in disconnecting loads is to generate a directional magnetic blowing field by setting a permanent magnet. When the moving and stationary contacts separate and generate an arc, the arc is rapidly elongated by the magnetic blowing field until the arc breaks. The breaking of the arc realizes the disconnection of the load and simultaneously extinguishes the arc.

[0004] In related technologies, the internal cavity of the relay is made of arc-resistant plastic. This plastic prevents the electric arc from contacting the permanent magnet, thus protecting it. However, given the limited space within the relay cavity, especially under higher loads and longer arcing times, the arc can easily contact the plastic and burn through the cavity, leading to severe carbon buildup. This can cause various problems such as contact failure, jamming of the actuator component, and poor withstand voltage, resulting in lower product performance. Furthermore, if the cavity burns through, the arc contacting the permanent magnet can cause demagnetization, prolonging the arcing time and potentially leading to relay explosion, posing a high risk of product failure. Summary of the Invention

[0005] Therefore, it is necessary to overcome the shortcomings of the existing technology and provide a relay that can effectively realize arc blowing, arc pulling, arc isolation and arc breaking, and can reduce the arc burning time to meet the requirements of high load capacity.

[0006] A relay, comprising:

[0007] A contact assembly, comprising a stationary contact lead-out end and a movable spring, wherein the stationary contact lead-out end is provided with a first contact portion, and the movable spring is provided with a second contact portion corresponding to the position of the first contact portion; and

[0008] A first permanent magnet is disposed around the movable reed;

[0009] Wherein, the outer portion of the first contact portion is provided with a first protrusion that protrudes in a direction away from the central axis of the moving spring, and the first protrusion engages with the second contact portion; or, the outer portion of the second contact portion is provided with a second protrusion that protrudes in a direction away from the central axis of the moving spring, and the second protrusion engages with the first contact portion.

[0010] In one embodiment, the first protrusion is disposed at the middle portion or any end of the first contact portion along the width direction of the movable spring; or, the second protrusion is disposed at the middle portion or any end of the second contact portion along the width direction of the movable spring.

[0011] In one embodiment, the outline shape of the first protrusion is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped; or, the outline shape of the second protrusion is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped.

[0012] In one embodiment, the movable spring is provided with an arc-blocking structure, which is arranged along one side of the second contact portion close to the central axis of the movable spring.

[0013] In one embodiment, the two opposite ends of the arc-blocking structure extend to two opposite sides of the moving spring along its width direction; the arc-blocking structure is configured as a clearance groove, and the depth of the arc-blocking structure increases from its middle position to any one end.

[0014] In one embodiment, at least one of the first contact portion and the second contact portion is provided with a clearance portion to avoid each other.

[0015] In one embodiment, the two opposite ends of the clearance portion on the first contact portion extend along the width direction of the movable spring to two opposite sides of the first contact portion; and / or, the two opposite ends of the clearance portion on the second contact portion extend along the width direction of the movable spring to two opposite sides of the second contact portion.

[0016] In one embodiment, there are two stationary contact leads and one moving spring. Each of the two opposite ends of the moving spring along its length is provided with a second contact portion. The first permanent magnet is provided in two groups, and the two groups of the first permanent magnet are arranged on the outside of the opposite ends of the moving spring along its length. The two groups of the first permanent magnet are respectively provided with one-to-one correspondence between the two second contact portions.

[0017] In one embodiment, the relay further includes a second permanent magnet disposed between the two stationary contact leads, the second permanent magnet having opposite magnetic properties to the two opposing surfaces of the first permanent magnet.

[0018] In one embodiment, the polarized side of the first permanent magnet faces the first contact portion and the second contact portion; the first permanent magnet is configured as an arc-shaped body, and the convex surface of the first permanent magnet is disposed opposite to the first contact portion and the second contact portion.

[0019] In the aforementioned relay, when the first and second contact parts separate or come into contact and generate an arc, the magnetic field formed by the first permanent magnet can pull the arc, causing the arc generated by the first or second protrusion to quickly enter the surrounding air. Furthermore, after the arc is ejected, the external magnetic field is stronger, making it easier to blow, pull, isolate, and extinguish the arc, thus achieving better arc extinguishing and rapid arc suppression. This reduces the arc burning time and effectively avoids defects such as arc erosion of the internal cavity and relay explosion. Even under high load conditions, it can still guarantee product performance and reduce the probability of product failure. Attached Figure Description

[0020] Figure 1 is a structural diagram of a relay according to an embodiment of this application.

[0021] Figure 2 is a structural diagram of the relay shown in Figure 1 after the stationary contact lead-out terminal is hidden.

[0022] Figure 3 is a structural diagram of a relay according to another embodiment of this application.

[0023] Figure 4 is a structural diagram of a relay according to another embodiment of this application.

[0024] Figure 5 is a structural diagram of the movable spring in the first embodiment of this application.

[0025] Figure 6 is a structural diagram of the movable spring in the second embodiment of this application.

[0026] Figure 7 is a structural diagram of the movable spring in the third embodiment of this application.

[0027] Figure 8 is a structural diagram of the movable spring in the fourth embodiment of this application.

[0028] Figure 9 is a direction diagram of an electric arc according to an embodiment of this application.

[0029] Figure 10 is a direction diagram of an electric arc according to another embodiment of this application.

[0030] Figure 11 is a direction diagram of an electric arc according to another embodiment of this application.

[0031] Figure 12 is a cross-sectional structural diagram of a relay according to an embodiment of this application.

[0032] 10. Contact assembly; 11. Stationary contact lead-out end; 111. First contact part; 12. Moving spring; 121. Second contact part; 1211. Second protrusion; 13. Arc isolation structure; 14. Clearance part; 20. Push assembly; 21. Coil; 22. Push rod; 30. First permanent magnet; 40. Second permanent magnet; 50. Inner cavity; 60. Base. Detailed Implementation

[0033] 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.

[0034] This embodiment provides a relay, as shown in Figures 1, 2, 5, and 12. Figures 1 and 2 respectively show schematic diagrams of the relay structure in two different embodiments of this application, and Figure 12 shows a cross-sectional view of the relay. One embodiment of the relay includes a contact assembly 10 and a push assembly 20. The contact assembly 10 includes a stationary contact lead-out terminal 11 and a moving spring 12. The push assembly 20 is connected to the moving spring 12 and is used to actuate the moving spring 12, causing the stationary contact lead-out terminal 11 and the moving spring 12 to contact or separate. Optionally, the push assembly 20 includes a coil 21 and a push rod 22, etc. The magnetic field generated when the coil 21 is energized can drive the push rod 22 to actuate, and the push rod 22 correspondingly causes the moving spring 12 to contact or separate from the stationary contact lead-out terminal 11. The push assembly 20 can also have various other structural forms, as long as it can actuate the moving spring 12; no limitation is made here. Furthermore, the specific structure of the push assembly 20 is prior art and is described in detail in the prior art, and will not be repeated here.

[0035] When the moving spring 12 and the stationary contact lead-out terminal 11 come into contact, the moving spring 12, the stationary contact lead-out terminal 11 and the load are connected to form a circuit, thereby realizing the connection of the load; conversely, when the moving spring 12 and the stationary contact lead-out terminal 11 are separated, the moving spring 12 and the stationary contact lead-out terminal 11 are disconnected from each other.

[0036] Please refer to Figures 1 and 2. For example, the stationary contact lead-out end 11 is provided with a first contact portion 111, and the moving spring 12 is provided with a second contact portion 121 corresponding to the position of the first contact portion 111. The first contact portion 111 and the second contact portion 121 cooperate to form a contact unit. In other words, the contact unit includes the first contact portion 111 and the second contact portion 121 that are in contact with each other. The number of contact units depends on the number of the first contact portion 111 and the second contact portion 121; it can be one set, two sets, three sets, or more sets, and the specific number is not limited. For ease of description and understanding of this utility model, this embodiment specifically uses two contact units as an example. Of course, the number of contact units can also be flexibly adjusted and set according to actual production needs.

[0037] It should be noted that the "positional correspondence" in the positional correspondence between the first contact portion 111 and the second contact portion 121 means that the first contact portion 111 and the second contact portion 121 are positioned opposite each other along the direction of movement of the movable spring 12; in other words, at least part of the projection area of ​​the first contact portion 111 on the movable spring 12 overlaps with the second contact portion 121 along the direction of movement of the movable spring 12.

[0038] It should be noted that the "first contact portion 111" can be a part of the "stationary contact lead-out end 11", that is, the "first contact portion 111" and the "other parts of the stationary contact lead-out end 11" are integrally formed; or it can be an independent component that can be separated from the "other parts of the stationary contact lead-out end 11", that is, the "first contact portion 111" can be manufactured independently and then combined with the "other parts of the stationary contact lead-out end 11" to form a whole.

[0039] Similarly, the "second contact portion 121" can be a "part of the moving spring 12", that is, the "second contact portion 121" and the "other parts of the moving spring 12" can be integrally molded; or it can be a separate component that can be separated from the "other parts of the moving spring 12", that is, the "second contact portion 121" can be manufactured independently and then combined with the "other parts of the moving spring 12" to form a whole.

[0040] The arrangement direction of the two contact units is defined as the first direction, as shown by the double arrow x in Figure 1; the second direction is shown by the double arrow y in Figure 2; the direction of movement of the moving spring 12 relative to the stationary contact lead-out end 11 is defined as the third direction, as shown by the double arrow z in Figure 1; the first direction, the second direction and the third direction are perpendicular to each other, where the first direction, the second direction and the third direction only represent spatial directions and have no substantial meaning.

[0041] Specifically, in this embodiment, the movable spring 12 is sheet-shaped. The movable spring 12 includes, but is not limited to, straight sheets, curved sheets, straight strips, curved strips, or other regular and irregular shapes, which can be adjusted and set according to actual needs. When the movable spring 12 is a straight sheet, its length direction is as shown by the double arrow x in Figure 1, its width direction is as shown by the double arrow y in Figure 2, and its thickness direction is as shown by the double arrow z in Figure 1. Furthermore, when the movable spring 12 is a curved sheet, specifically a U-shaped curved sheet, the opposite ends of the movable spring 12 protrude towards the two first contact portions 111, and the portion between the opposite ends of the movable spring 12, that is, the middle portion of the movable spring 12, is recessed away from the stationary contact lead-out end 11.

[0042] Optionally, the movable spring 12 preferably adopts a symmetrical structure, which can be either an axisymmetric structure or a centrosymmetric structure. Of course, the movable spring 12 can also be configured as an asymmetrical structure.

[0043] When the moving reed 12 and the stationary contact lead-out terminal 11 separate, an electric arc will be generated between the first contact portion 111 and the second contact portion 121 due to the separation. If the arc cannot be interrupted or extinguished in time, given the limited space in the relay's internal cavity 50, especially when the load is high, the arcing time will be longer. The arc is likely to contact the plastic parts and burn the internal cavity 50, resulting in severe carbon buildup in the internal cavity 50. This can lead to various problems such as contact failure, stuck drive assembly 20, and poor withstand voltage, resulting in low product performance. In addition, when the internal cavity 50 is burned through, the arc will contact the permanent magnet, causing the permanent magnet to demagnetize, increasing the arcing time, and potentially leading to relay explosion. The product has a high risk of failure.

[0044] For the reasons mentioned above, this application provides a relay that can effectively realize arc blowing, arc pulling, arc isolation and arc breaking, and can reduce the arc burning time, thus meeting the technical solution of high load capacity requirements.

[0045] Please refer again to Figure 1 or Figure 2. One embodiment of the relay provided in this application further includes a first permanent magnet 30. The first permanent magnet 30 is disposed around the movable reed 12.

[0046] Optionally, the polarized side of the first permanent magnet 30 faces the contact unit, that is, the first contact portion 111 and the second contact portion 121, so as to use the magnetic field formed by the first permanent magnet 30 to extinguish the arc.

[0047] The movable spring 12 has a second contact portion 121 at each of its opposite ends along its length. Two sets of first permanent magnets 30 are provided. Optionally, referring to Figure 1 or Figure 2, the two sets of first permanent magnets 30 can be arranged on the outer sides of the opposite ends of the movable spring 12 along its length, with each set corresponding to one of the two contact units. The contact units and their corresponding first permanent magnets 30 are arranged close to each other. Of course, the two sets of first permanent magnets 30 can also be arranged in other ways, for example, on any diagonal of the movable spring 12.

[0048] The first contact portion 111 has a first protrusion protruding toward the first permanent magnet 30 on its outer side, and the first protrusion engages with the second contact portion 121, forming a conductive connection when in contact or when about to contact but not yet in contact; or, the second contact portion 121 has a second protrusion 1211 protruding toward the first permanent magnet 30 on its outer side, and the second protrusion 1211 engages with the first contact portion 111, forming a conductive connection when in contact or when about to contact but not yet in contact.

[0049] It should be noted that, in this embodiment, the outer portion of the first contact portion 111 refers to the side of the first contact portion 111 away from the central axis of the movable spring 12; conversely, the inner portion of the first contact portion 111 refers to the side of the first contact portion 111 close to the central axis of the movable spring 12. Similarly, the outer portion of the second contact portion 121 refers to the side of the second contact portion 121 away from the central axis of the movable spring 12; conversely, the inner portion of the second contact portion 121 refers to the side of the second contact portion 121 close to the central axis of the movable spring 12. The central axis of the movable spring is shown by the dashed line O in Figure 1.

[0050] In the aforementioned relay, when the first contact 111 and the second contact 121 separate or come into contact with each other and generate an electric arc, the magnetic field formed by the first permanent magnet 30 can pull the electric arc, allowing the electric arc generated by the first protrusion or the second protrusion 1211 to quickly enter the surrounding air. Moreover, after the electric arc is blown out, the external magnetic field is stronger, making it easier to blow, pull, isolate, and break the arc, thereby achieving a better arc breaking and rapid arc extinguishing effect, reducing the arc burning time, and effectively avoiding defects such as arc burning of the inner cavity 50 and causing the relay to explode. Even under high load conditions, the product performance can still be guaranteed, and the probability of product failure can be reduced.

[0051] It should be noted that, in this embodiment, "enclosed on all four sides" means that a point is selected on the side wall of the tank as the starting point, and moving from the starting point along the circumference of the side wall of the tank will eventually return to the starting point; conversely, "non-enclosed on all four sides" means that a point is selected on the side wall of the tank as the starting point, and moving from the starting point along the circumference of the side wall of the tank will eventually not return to the starting point.

[0052] The outer edge of the contact unit refers to the edge of the contact unit facing away from the central axis of the movable spring 12. Correspondingly, the outer edge of the first contact portion 111 refers to the edge of the first contact portion 111 facing away from the central axis of the movable spring 12, and the outer edge of the second contact portion 121 refers to the edge of the second contact portion 121 facing away from the central axis of the movable spring 12.

[0053] Based on any of the foregoing embodiments, the outline shapes of the first protrusion and the second protrusion 1211 can be flexibly adjusted and set according to actual needs, including but not limited to regular shapes such as polygons, circles, semicircles, U-shapes or Ω-shapes, and other irregular shapes. Among them, polygons include but are not limited to rectangles, trapezoids or triangles, etc.

[0054] It should be noted that the specific location of the first protrusion on the outer side of the first contact portion 111 is not limited and can be flexibly adjusted and set according to actual needs. Optionally, the first protrusion can be located at the middle part or any end of the first contact portion 111 along the width direction of the moving spring 12, both of which can achieve the functions of arc breaking, arc isolation, and arc extinguishing. When the first protrusion is located at the middle part of the first contact portion 111 along the width direction of the moving spring 12, regardless of whether a positive or reverse current is applied, the generated arc will enter the air under the action of the magnetic field of the first permanent magnet 30, achieving rapid arc breaking and arc extinguishing effects.

[0055] Similarly, the specific location of the second protrusion 1211 on the outer side of the second contact portion 121 is not limited and can be flexibly adjusted and set according to actual needs. Optionally, as shown in Figures 1, 2, and 5, the second protrusion 1211 can be located at the middle part of the second contact portion 121 along the width direction of the moving spring 12. Of course, the second protrusion 1211 can also be located at any end of the second contact portion 121 along the width direction of the moving spring 12, all of which can achieve the functions of arc breaking, arc isolation, and arc extinguishing.

[0056] When the second protrusion 1211 is located at the middle part of the second contact part 121 along the width direction of the moving spring 12, the generated arc will enter the air under the action of the magnetic field of the first permanent magnet 30, regardless of whether a positive or reverse current is applied, thus achieving rapid arc breaking and arc extinguishing effects.

[0057] Please refer to Figures 9 and 10. To make the arc-breaking principle of the second protrusion 1211 of the moving spring 12 clearer, this embodiment uses two contact units as an example to introduce the specific arc-breaking and arc-extinguishing principles. Since the two second protrusions 1211 respectively contact the two first contact units 111, when the two contact units disconnect synchronously, an arc is generated at the two second protrusions 1211. The two arc-starting points are, for example, positions A and B as shown in Figure 9 or Figure 10. Under the guidance of the first permanent magnet 30, the arcs at the two arc-starting points are blown away in diagonal directions. Specifically, referring to Figure 9, the arc at position A extends into the air at an upward-left angle, as indicated by the dashed arrow at position A in Figure 9. The arc at position B extends into the air at a downward-right angle, as indicated by the dashed arrow at position B in Figure 9. In this way, the arcs generated at positions A and B directly enter the air, thereby achieving the arc-breaking and arc-extinguishing effects. Referring to Figure 10, when the current direction is changed, that is, when the current direction is reversed, the direction of the arc at point A changes accordingly. For example, it extends obliquely to the lower left, as indicated by the dashed arrow at point A in Figure 10. The arc generated at point A directly enters the air, thus achieving the function of arc breaking and arc extinguishing. Similarly, the direction of the arc at point B changes accordingly, for example, it extends obliquely to the upper right, as indicated by the dashed arrow at point B in Figure 10. The arc generated at point B directly enters the air, thus achieving the function of arc breaking and arc extinguishing.

[0058] Furthermore, in cases where the electric arc is uncontrolled, or when a second permanent magnet 40 is present, or when the contacts are worn, the direction of the arc's blowing is irregular. It may blow not only towards the outer part of the second contact portion 121, but also towards the inner part, as shown in Figure 11. Therefore, optionally, as shown in Figures 6 to 8, the moving spring 12 is provided with an arc-blocking structure 13. The arc-blocking structure 13 is arranged along one side of the second contact portion 121 near the central axis of the moving spring 12. In this way, the arc-blocking structure 13 can also serve to block the arc and quickly extinguish it, greatly reducing the arcing time.

[0059] Optionally, the number of arc-blocking structures 13 may include, but is not limited to, one, two, three, or more, and can be flexibly adjusted and set according to actual needs, without limitation here. In this embodiment, the arc-blocking structure 13 is specifically set to one, for example. Thus, although the electric arc may blow towards the inner part of the second contact portion 121 in some cases, the length of the electric arc blowing towards the inner part of the second contact portion 121 is not large. Therefore, setting one arc-blocking structure 13 can achieve the functions of arc breaking and arc blocking, without the need to set more arc-blocking structures 13, thereby avoiding the defect of excessive current-carrying temperature rise caused by too many arc-blocking structures 13.

[0060] Of course, as some optional solutions, the arc-blocking structure 13 in this embodiment is not limited to one of the above embodiments, and can also be set to multiple. Compared with setting one arc-blocking structure 13, setting multiple arc-blocking structures 13 can break and block the arc layer by layer, further improving the arc-breaking and arc-blocking effect, but it will affect the current carrying capacity and cause the temperature to rise.

[0061] For example, the two opposite ends of the arc-blocking structure 13 extend to the two opposite sides of the moving spring 12 along its width direction. In this way, the arc-blocking structure 13 is relatively long, and the arc-breaking and arc-blocking area is large, thus having a better arc-breaking and arc-blocking effect.

[0062] The magnetic field strength on the surface of the first permanent magnet 13 can be measured using a gaussmeter, and it can be observed that the magnetic field at both ends is significantly stronger than that in the middle. For example, for a strip-shaped first permanent magnet 13, the surface magnetic field at both ends may reach several thousand gauss, while that in the middle may only be several hundred gauss. Referring to Figure 8, the electric arc is relatively easily blown towards the end portion of the arc-blocking structure 13, while the arc blown towards the middle portion of the arc-blocking structure 13 is relatively less. Based on this, the arc-blocking structure 13 is designed as a relief groove, and the depth of the arc-blocking structure 13 increases from its middle position to any end. In other words, the depth of the arc-blocking structure 13 is deepest at the two ends. Thus, the two ends of the arc-blocking structure 13 effectively interrupt and block the electric arc. Furthermore, the depth at the middle portion of the arc-blocking structure 13 is, for example, the smallest, specifically, it may be flush with the surface of the moving spring 12. Thus, the arc-breaking and arc-blocking effect of the middle portion of the arc-blocking structure 13 is not significant, but because the current-carrying cross-sectional area is large, it does not affect the current carrying capacity, i.e., it does not affect the temperature rise.

[0063] For example, the arc-blocking structure 13 may include, but is not limited to, being configured as a clearance groove, clearance hole, or clearance notch, etc., and can be flexibly adjusted and set according to actual needs.

[0064] Based on any of the foregoing embodiments, the outline shape of the arc-separating structure 13 includes, but is not limited to, regular shapes such as arc, rectangle, trapezoid, triangle, circle, semicircle, U-shape or Ω-shape, as well as various other irregular shapes.

[0065] Referring to Figure 8, for example, at least one of the first contact portion 111 and the second contact portion 121 is provided with a clearance portion 14 to avoid each other. In this way, on the one hand, the electric arc can be interrupted, thereby playing the role of arc isolation and rapid arc extinguishing, reducing the arcing time; on the other hand, it can effectively prevent the electric arc from flowing towards the inner part of the second contact portion 121, so that even under high load, the product performance can still be guaranteed and the probability of product failure can be reduced.

[0066] For example, the two opposite ends of the clearance portion 14 on the first contact portion 111 extend along the width direction of the movable spring 12 to the two opposite sides of the first contact portion 111; and / or, the two opposite ends of the clearance portion 14 on the second contact portion 121 extend along the width direction of the movable spring 12 to the two opposite sides of the second contact portion 121. Thus, the clearance portion 14 is relatively long, and the arc-breaking and arc-isolating area is large, resulting in better arc-breaking and arc-isolating effects.

[0067] When both the first contact portion 111 and the second contact portion 121 are provided with clearance portions 14, the clearance portions 14 on the first contact portion 111 and the clearance portions 14 on the second contact portion 121 are, for example, offset from each other, thus avoiding each other and achieving better arc breaking and arc isolation effects. Of course, the clearance portions 14 on the first contact portion 111 and the clearance portions 14 on the second contact portion 121 can also be aligned and connected to each other.

[0068] For example, the clearance portion 14 may include, but is not limited to, clearance grooves, clearance holes, or clearance notches.

[0069] Based on any of the foregoing embodiments, the outline shape of the arc-separating structure 13 includes, but is not limited to, regular shapes such as arc, rectangle, trapezoid, triangle, circle, semicircle, U-shape or Ω-shape, as well as various other irregular shapes.

[0070] Based on the aforementioned embodiments, the clearance portion 14 is disposed on the second contact portion 121, and specifically, for example, located between the second protrusion 1211 and the arc-blocking structure 13. The number of clearance portions 14 can be flexibly adjusted and set according to actual needs, including but not limited to one or more. Among them, multiple clearance portions may be, for example, two, three or other numbers.

[0071] Please refer to Figures 1 and 2. In one specific embodiment, there are two stationary contact leads 11 and one moving spring 12. Each end of the moving spring 12 along its length is provided with a second contact portion 121. There are two first permanent magnets 30, which are arranged on the outer sides of the opposite ends of the moving spring 12 along its length.

[0072] Referring to Figure 3 or Figure 4, for example, the relay also includes a second permanent magnet 40. The second permanent magnet 40 is disposed corresponding to the contact unit, located on the side of the contact unit opposite to the first permanent magnet 30. The polarized side of the second permanent magnet 40 faces the corresponding contact unit, and the polarity of the side of the second permanent magnet 40 facing the contact unit is opposite to the polarity of the side of the first permanent magnet 30 facing the contact unit. Thus, the arc extinguishing effect is achieved by utilizing the magnetic field formed at the contact unit by the first permanent magnet 30 and the second permanent magnet 40. The magnetic field strength is relatively large, resulting in a better arc extinguishing effect.

[0073] Please refer to Figure 3 or Figure 4. The second permanent magnet 40 is positioned between the two stationary contact leads 11. The magnetic properties of the two opposite surfaces of the second permanent magnet 40 and the first permanent magnet 30 are opposite.

[0074] The second permanent magnet 40 can be one, two, or other quantities. In this embodiment, for example, two second permanent magnets 40 are set, with each of the two second permanent magnets 40 corresponding to one of the two first permanent magnets 30.

[0075] Optionally, when the polarity of the side of the first permanent magnet 30 facing the second permanent magnet 40 is N, the polarity of the side of the second permanent magnet 40 facing the first permanent magnet 30 is S; conversely, when the polarity of the side of the first permanent magnet 30 facing the second permanent magnet 40 is S, the polarity of the side of the second permanent magnet 40 facing the first permanent magnet 30 is N.

[0076] For example, the number of first permanent magnets 30 may include, but is not limited to, one, two, three or more, and the specific number can be flexibly adjusted and set according to actual needs. Specifically, when the load is low, one first permanent magnet 30 is sufficient; when the load is high, the number of first permanent magnets 30 needs to be increased, for example, two first permanent magnets 30 may be used and stacked together to increase the magnetic field strength.

[0077] For example, the magnetic force of the first permanent magnet 30 is stronger than that of the second permanent magnet 40.

[0078] Based on any of the foregoing embodiments, please refer to Figure 2 or Figure 3, the first permanent magnet 30 can be configured as a flat plate.

[0079] Based on any of the foregoing embodiments, referring to Figure 4, the first permanent magnet 30 can also be configured as an arc-shaped body, with its outer convex surface positioned opposite to the corresponding contact unit. This increases the magnetic blowing intensity along the arc-blowing path, making the arc more dispersed, ensuring a stronger magnetic field along the arc-blowing path, and better achieving the purpose of breaking the arc.

[0080] Specifically, for the first contact portion 111 with the first protrusion, the magnetic field strength on opposite sides of the first protrusion along its width is higher than the magnetic field strength at the first protrusion itself. This means that when the arc is ejected outward from the side of the first protrusion, the larger magnetic field outside the first protrusion facilitates arc blowing and helps extinguish the arc. Similarly, for the second contact portion 121 with the second protrusion 1211, the magnetic field strength on opposite sides of the second protrusion 1211 is higher than the magnetic field strength at the second protrusion itself, i.e., the magnetic field strength at point C is higher than the magnetic field strength at point D in Figure 4. This means that when the arc is ejected outward from the side of the second protrusion 1211, the larger magnetic field outside the first protrusion facilitates arc blowing and helps extinguish the arc.

[0081] It should be noted that the position, number, shape, and arrangement of the second protrusion 1211 on the moving spring 12 can be replicated on the first contact portion 111 of the stationary contact lead-out end 11, as shown in Figures 5 to 11. In other words, the position, number, shape, and arrangement of the first protrusion on the first contact portion 111 of the stationary contact lead-out end 11 can be similar to the position, number, shape, and arrangement of the second protrusion 1211 on the moving spring 12. This application will not elaborate further here, nor will it provide accompanying drawings to illustrate these details. Furthermore, the technical effects that the first protrusion on the first contact portion 111 of the stationary contact lead-out end 11 can achieve are analogous to the technical effects that the second protrusion 1211 can achieve on the second contact portion 121, and will not be elaborated further here.

[0082] Referring to Figure 12, in some embodiments, the relay further includes an inner cavity 50 and a base 60. The inner cavity 50 is connected to the base 60 and encloses it to form a chamber. The inner cavity 50 is made of, but is not limited to, a plastic material. An electrostatic discharge terminal is installed on the top wall of the inner cavity 50 and extends into the chamber. A movable spring 12 is movably disposed inside the chamber. A push assembly 20 is connected to the base 60, and the push rod 22 of the push assembly 20 extends into the chamber and connects to the movable spring 12. A first permanent magnet 30 is installed inside the cavity wall of the inner cavity 50, and a second permanent magnet 40 is connected to the cavity wall of the inner cavity 50. Thus, the cavity wall of the inner cavity 50 encloses the first permanent magnet 30 and the second permanent magnet 40, providing good protection for the first permanent magnet 30 and the second permanent magnet 40 and effectively preventing demagnetization defects caused by arc contact. The relay also includes a housing (not shown in the figure), which is fitted over the outer side of the inner cavity 50 and connected to the base 60. Potting compound can be applied between the outer shell and the inner cavity 50.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A relay, characterized in that, include: A contact assembly includes a stationary contact lead-out end and a movable spring. The stationary contact lead-out end has a first contact portion, and the movable spring has a second contact portion corresponding to the position of the first contact portion. A first permanent magnet is disposed around the movable spring. The outer portion of the first contact portion has a first protrusion protruding in a direction away from the central axis of the movable spring, and the first protrusion engages with the second contact portion. Alternatively, the outer portion of the second contact portion has a second protrusion protruding in a direction away from the central axis of the movable spring, and the second protrusion engages with the first contact portion.

2. The relay according to claim 1, characterized in that, The first protrusion is located at the middle part or any end of the first contact part along the width direction of the movable spring; or, the second protrusion is located at the middle part or any end of the second contact part along the width direction of the movable spring.

3. The relay according to claim 1, characterized in that, The outline shape of the first protrusion is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped; or, the outline shape of the second protrusion is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped.

4. The relay according to claim 1, characterized in that, The movable spring is provided with an arc-blocking structure, which is arranged along one side of the second contact portion close to the central axis of the movable spring.

5. The relay according to claim 4, characterized in that, The two ends of the arc-blocking structure extend to the two opposite sides of the moving spring along its width direction; the arc-blocking structure is configured as a clearance groove, and the depth of the arc-blocking structure increases from its middle position to any one end.

6. The relay according to claim 1, characterized in that, At least one of the first contact portion and the second contact portion is provided with a clearance portion to avoid each other.

7. The relay according to claim 6, characterized in that, The two opposite ends of the clearance portion on the first contact portion extend along the width direction of the moving spring to the two opposite sides of the first contact portion; and / or, the two opposite ends of the clearance portion on the second contact portion extend along the width direction of the moving spring to the two opposite sides of the second contact portion.

8. The relay according to claim 1, characterized in that, The stationary contact leads are provided in two places, and the moving spring is provided in one place. The moving spring is provided with a second contact portion at each of its opposite ends along the length direction. The first permanent magnet is provided in two groups, and the two groups of the first permanent magnet are arranged on the outside of the opposite ends of the moving spring along the length direction. The two groups of the first permanent magnet are respectively provided with one-to-one correspondence between the two second contact portions.

9. The relay according to claim 8, characterized in that, The relay also includes a second permanent magnet, which is disposed between the two stationary contact leads. The magnetic properties of the two opposite sides of the second permanent magnet are opposite to those of the first permanent magnet.

10. The relay according to any one of claims 1 to 9, characterized in that, The polarized side of the first permanent magnet faces the first contact portion and the second contact portion; the first permanent magnet is configured as an arc-shaped body, and the convex surface of the first permanent magnet is disposed opposite to the first contact portion and the second contact portion.

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