Relay

Abstract

According to the relay, when a first contact part and a second contact part are separated from each other or make contact with each other to generate an electric arc, a magnetic field formed by a first permanent magnet can play a traction role on the electric arc, and the arc blowing and arc discharging effects are achieved. The electric arc moves along the contact surface, and when the electric arc moves to the arc isolating groove, the arc isolating groove can play a role in isolating, lengthening and blocking the electric arc, so that the arcing time is shortened. Therefore, the defects that the electric arc ablates the inner cavity and causes relay explosion and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the product failure probability can be reduced. And meanwhile, the first contact part is synchronously contacted with the at least two sheet units, and the first contact part and the second contact part have at least two contact points, so that the shunting effect is achieved, the contact resistance can be reduced, the contact stability and reliability can be improved, and the temperature rise can be reduced.

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 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. Utility Model Content

[0005] Therefore, it is necessary to overcome the shortcomings of the existing technology and provide a relay that can effectively improve the effects of arc blowing, arc pulling, arc blocking and arc breaking, meet the requirements of high load capacity, prevent the burning of the inner cavity, reduce the risk of product failure, and improve contact stability and reliability.

[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; the movable spring includes at least two sheet units arranged side-by-side at intervals along its width direction and an electrical connector, wherein the at least two sheet units are connected and fixed by the electrical connector, and adjacent two sheet units cooperate to form an arc-blocking groove; and

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

[0009] In one embodiment, the arc-blocking groove extends to the outer edge of the second contact portion; and / or, the moving spring has a symmetrical structure.

[0010] In one embodiment, the electrical connector is connected to the side of the sheet unit opposite to the first contact portion.

[0011] In one embodiment, the electrical connector is an electrical connector piece; there are two electrical connector pieces, one of which is connected to one end of each sheet unit along its length, and the other is connected to the other end of each sheet unit; or, there is one electrical connector piece, and both opposite ends of each sheet unit along its length are connected to the electrical connector piece.

[0012] In one embodiment, the electrical connector is configured as a straight connector or a curved connector.

[0013] In one embodiment, the movable spring further includes a plurality of fasteners, which are correspondingly disposed with respect to a plurality of sheet units, and each sheet unit is fixedly connected to the electrical connector by the corresponding fastener.

[0014] In one embodiment, the electrical connector is disposed at the interval between two adjacent sheet units, and the sidewalls of the two sheet units facing each other are connected by the electrical connector. The electrical connector and the two sheet units are an integral structure.

[0015] In one embodiment, there are multiple electrical connectors, which are arranged at intervals along the length of the sheet unit.

[0016] In one embodiment, the movable spring has a positioning recess on the side facing away from the first contact portion, the positioning recess being recessed toward the first contact portion, and the positioning recess being used for positioning and engaging with the push rod of the push assembly.

[0017] In one embodiment, the outer portion of the first contact portion and the outer portion of the second contact portion abut against each other, and the arc-blocking groove is formed in the portion of the outer portion of the second contact portion where the magnetic field strength is relatively weak.

[0018] In one embodiment, a contact unit is provided on the outer side of the second contact portion where the magnetic field strength is relatively high, and the contact unit abuts against the outer side of the first contact portion; two contact units are provided, and the arc-blocking groove is provided between the two contact units.

[0019] In one embodiment, the distance between the two opposite inner sidewalls of the arc-blocking groove is set to W, where W ≥ 1.5 mm.

[0020] In one embodiment, the arc-blocking groove is a blind groove or a through groove; the arc-blocking groove is a groove that is closed on all four sides, or the arc-blocking groove is a groove that is not closed on all four sides; the outline shape of the arc-blocking groove is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped or Ω-shaped.

[0021] In one embodiment, the first contact portion and the second contact portion are in contact with each other to form a contact unit; the polar side of the first permanent magnet faces the contact unit.

[0022] In one embodiment, the relay further includes a second permanent magnet, which is disposed corresponding to the contact unit. The second permanent magnet is located on the side of the contact unit away from the first permanent magnet. The polarized side of the second permanent magnet faces the corresponding contact unit, and the polarity of the side of the second permanent magnet facing the contact unit is opposite to the polarity of the side of the first permanent magnet facing the contact unit.

[0023] 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. There are two sets of first permanent magnets, which are arranged on the outside of the opposite ends of the moving spring along its length. The two sets of first permanent magnets are arranged one-to-one with the two second contact portions.

[0024] 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.

[0025] In one embodiment, the number of the first permanent magnets is adjustable; and / or, the magnetic force of the first permanent magnets is stronger than that of the second permanent magnets.

[0026] 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, achieving the effects of arc blowing and arc pulling. The arc moves along the contact surface, and when it reaches the arc-blocking groove, the groove can separate, lengthen, and block the arc, reducing the arcing time. Furthermore, because the arc-blocking groove is set according to the magnetic blowing path, the positions of the first and second contact parts are relatively controllable, and the contact area is relatively small, thus the arc ignition point is more controllable, resulting in a significant arc-blocking effect. This effectively avoids defects such as arc erosion of the internal cavity and relay explosion, ensuring product performance even under high load and reducing the probability of product failure. Simultaneously, the first contact part contacts at least two sheet units, and there are at least two contact points between the first and second contact parts, which acts as a current shunt, reducing contact resistance, thereby improving contact stability and reliability, and reducing temperature rise. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a relay according to an embodiment of this application.

[0028] Figure 2 This is a structural diagram of a relay according to another embodiment of this application.

[0029] Figure 3 This is a structural view of the movable spring in the first embodiment of this application.

[0030] Figure 4 for Figure 3 The diagram shows another perspective of the moving spring.

[0031] Figure 5 for Figure 3 The diagram shows the structure of the moving spring and the two stationary contact leads.

[0032] Figure 6 This is a structural view of the movable spring in the second embodiment of this application.

[0033] Figure 7 for Figure 6 The diagram shows another perspective of the moving spring.

[0034] Figure 8 This is a structural view of the movable spring in the third embodiment of this application.

[0035] Figure 9 for Figure 8 The diagram shows another perspective of the moving spring.

[0036] Figure 10 This is a structural view of the movable spring in the fourth embodiment of this application.

[0037] Figure 11 for Figure 10 The diagram shows another perspective of the moving spring.

[0038] Figure 12 This is a structural view of the movable spring in the fifth embodiment of this application.

[0039] Figure 13 for Figure 12 The diagram shows another perspective of the moving spring.

[0040] Figure 14 This is a structural view of the movable reed in the sixth embodiment of this application.

[0041] Figure 15 for Figure 14 The diagram shows another perspective of the moving spring.

[0042] Figure 16 This is a diagram showing the direction of the electric arc on a moving reed according to an embodiment of this application.

[0043] Figure 17 This is a diagram showing the direction of the electric arc on the moving reed according to another embodiment of this application.

[0044] Figure 18 This is a diagram showing the direction of the electric arc on the moving reed in another embodiment of this application.

[0045] Figure 19 This is a diagram showing the direction of the electric arc on the moving reed in another embodiment of this application.

[0046] Figure 20 This is a structural diagram showing the arrangement of the first permanent magnet in an embodiment of this application.

[0047] Figure 21 This is a structural diagram showing the arrangement of the first permanent magnet in another embodiment of this application.

[0048] Figure 22 This is a cross-sectional view of a relay according to an embodiment of this application.

[0049] 10. Contact assembly; 11. Stationary contact lead-out end; 111. First contact portion; 12. Moving spring; 121. Second contact portion; 122. Sheet unit; 123. Electrical connector; 124. Arc-blocking groove; 125. Fastener; 126. Positioning recess; 1211. Abutting unit portion; 20. Push assembly; 21. Coil; 22. Push rod; 30. First permanent magnet; 40. Second permanent magnet; 50. Inner cavity; 60. Base. Detailed Implementation

[0050] 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.

[0051] This embodiment provides a relay, such as Figure 1 , Figure 3 , Figure 4 and Figure 22 As shown, Figure 1 A schematic diagram of the structure of a relay according to an embodiment of this application is shown. Figure 3 and Figure 4 The diagram illustrates two different viewpoints of the movable spring 12 according to an embodiment of this application. Figure 22 A cross-sectional view of a relay according to an embodiment of this application is shown. The relay of this embodiment 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.

[0052] 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.

[0053] Please see Figure 1 , Figures 3 to 5For 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, and can be one, two, three or more groups, 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Define the arrangement direction of the two contact elements as the first direction, as follows: Figure 1 or Figure 5 The double arrow x is shown in the diagram; the second direction is as follows: Figure 5 As shown by the double arrow y; the direction of movement of the moving spring 12 relative to the stationary contact lead-out end 11 is the third direction, as shown in the third direction. Figure 1 or Figure 5 The double arrow z in the diagram shows that the first direction, the second direction, and the third direction are perpendicular to each other. However, the first direction, the second direction, and the third direction only represent spatial directions and have no real meaning.

[0058] 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. Assuming the movable spring 12 is a straight sheet, its length direction is also as follows... Figure 5 As shown by the double arrow x in the diagram, the width direction of the movable spring 12 is also as shown in the diagram. Figure 5 As shown by the double arrow y in the diagram, the thickness direction of the movable spring 12 is also as shown in the diagram. Figure 5 As shown by the double arrow z in the figure. In addition, when the moving spring 12 is a curved piece, specifically a U-shaped curved piece, the two opposite ends of the moving spring 12 protrude toward the two first contact portions 111 respectively, and the part between the two opposite ends of the moving spring 12, that is, the middle part of the moving spring 12, is recessed toward the direction away from the stationary contact lead-out end 11.

[0059] 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.

[0060] 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.

[0061] Based on the above reasons, this application provides a relay that can effectively improve the effects of arc blowing, arc pulling, arc blocking and arc breaking, meet the requirements of high load capacity, prevent the inner cavity from burning 50, reduce the risk of product failure, and improve the contact stability and reliability.

[0062] Please refer to the following: 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.

[0063] 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.

[0064] The movable spring 12 has a second contact portion 121 at each of its opposite ends along its length. The first permanent magnet 30 is provided in two sets. Optionally, please refer to... Figure 1 or Figure 2 Two sets of first permanent magnets 30 can be respectively arranged on the outer sides of opposite ends of the moving spring 12 along its length, and the two sets of first permanent magnets 30 are respectively arranged in a one-to-one correspondence with two contact units. The contact units and their corresponding first permanent magnets 30 are arranged close to each other. Specifically, the two sets of first permanent magnets 30 are symmetrically distributed about the center of the moving spring 12.

[0065] Of course, the two sets of first permanent magnets 30 are not limited to such Figure 1 and Figure 2 The arrangement can also be done in other ways, for example, see [reference needed]. Figure 20 and Figure 21 The two sets of first permanent magnets 30 are respectively arranged on any one of the diagonals of the moving spring 12. Specifically, the two sets of first permanent magnets 30 are symmetrically distributed about the center of the moving spring 12.

[0066] Please see Figures 3 to 5 The movable spring 12 includes at least two sheet units 122 arranged side by side at intervals along its width direction and an electrical connector 123. The at least two sheet units 122 are connected and fixed by the electrical connector 123, and two adjacent sheet units 122 cooperate to form an arc-blocking groove 124.

[0067] The number of sheet units 122 includes, but is not limited to, two, three, or four. For ease of description and understanding, this embodiment will be specifically illustrated by having two sheet units 122, but the actual number is not limited to this.

[0068] Furthermore, the outer portion of the first contact portion 111 and the outer portion of the second contact portion 121 abut against each other, and an arc-blocking groove 124 is formed in the relatively weak magnetic field area of ​​the outer portion of the second contact portion 121. Simultaneously, a contact unit 1211 is provided in the relatively strong magnetic field area of ​​the outer portion of the second contact portion 121, and the contact unit 1211 abuts against the outer portion of the first contact portion 111. Thus, since the arc-blocking groove 124 is located in the relatively weak magnetic field area of ​​the outer portion of the second contact portion 121, the arc ignition point is located at the point where the contact unit 1211 and the first contact portion 111 contact each other. This allows the arc ignition point to be controlled at the relatively strong magnetic field area, resulting in a strong arc-initiating effect. Simultaneously, the arc-blocking groove 124 is adjacent to the arc ignition point, enabling rapid arc extinguishing and a significant arc-blocking effect. This effectively prevents arc erosion of the inner cavity 50 and relay explosions, ensuring product performance even under high loads and reducing the probability of product failure.

[0069] For example, when the arc-blocking groove 124 is disposed on the outer side of the second contact portion 121, the arc-blocking groove 124 can correspondingly avoid the first contact portion 111. The portion of the outer side of the second contact portion 121 with a higher magnetic field strength, since the arc-blocking groove 124 is not disposed there, will make contact with the outer side of the first contact portion 111. The arc-blocking groove 124 is located on the magnetic blow-out path, which can help to separate, lengthen and block the arc, thereby reducing the arcing time.

[0070] 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 as follows: Figure 1 As shown by the dashed line O in the diagram.

[0071] It should be noted that the curvature at both ends of the first permanent magnet 13 is larger, resulting in a more pronounced edge effect and a more concentrated magnetic field, thus enhancing the surface magnetism. In contrast, the curvature in the central region of the first permanent magnet 13 is smaller, the magnetic field is more evenly distributed, and the surface magnetism is weaker.

[0072] Specifically, in this embodiment, 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.

[0073] Therefore, by adjusting the position of the first permanent magnet 30, for example, by adjusting the position of the first permanent magnet 30 in the width direction of the moving spring 12, the magnetic field strength distribution along the width direction of the outer part of the first contact portion 111 can be adjusted accordingly, as can the magnetic field strength distribution along the width direction of the outer part of the second contact portion 121. When the magnetic field strength distribution along the width direction of the outer part of the second contact portion 121 is strong-weak-strong, two abutting units 1211 are provided, and the arc-blocking groove 124 is provided between the two abutting units 1211. That is, the two abutting units 1211 are respectively arranged on two opposite sides of the outer part of the second contact portion 121 along the width direction. In this way, not only can a better arc-breaking and arc-blocking effect be achieved, but also when the contact unit is closed, both abutting units 1211 simultaneously make electrical contact with the first contact portion 111, thereby playing a parallel current-splitting role, reducing contact resistance, and improving stability.

[0074] In the aforementioned relay, when the first contact 111 and the second contact 121 separate or come into contact with each other, causing an arc at the contact unit, the magnetic field generated by the first permanent magnet 30 can pull the arc, causing it to move along the contact surface of the contact unit. When the arc moves to the arc-blocking groove 124, the arc-blocking groove 124 is non-conductive and breaks the arc, thereby achieving arc blocking and arc extinguishing effects and reducing the arcing time. Furthermore, because the arc-blocking groove 124 is set according to the magnetic blow-out path, the positions of the first contact 111 and the second contact 121 are relatively controllable, and the contact area is relatively small, thus the arc ignition point position is more controllable, resulting in a significant arc blocking effect. This effectively avoids defects such as arc erosion of the inner cavity 50 and relay explosion, ensuring product performance even under high load conditions and reducing the probability of product failure. At the same time, the first contact portion 111 simultaneously contacts at least two sheet units 122. The first contact portion 111 and the second contact portion 121 have at least two contact points, which serve as a current shunting function, reducing contact resistance and thus improving contact stability and reliability.

[0075] Please see Figures 3 to 5 or Figure 6 and Figure 7 For example, the electrical connector 123 is connected to the side of the sheet unit 122 facing away from the first contact portion 111. Thus, the side of each sheet unit 122 facing the first contact portion 111 makes electrical contact with the first contact portion 111 when the contact unit is closed, achieving reliable and stable electrical contact. The slot opening of the arc-blocking groove 124 is positioned opposite to the first contact portion 111, allowing it to function normally in arc-breaking and arc-blocking operations. Therefore, the electrical connector 123 does not affect the normal arc-blocking function of the arc-blocking groove 124, nor does it affect the normal electrical contact between the first contact portion 111 and the second contact portion 121.

[0076] Based on the aforementioned embodiments, the electrical connector 123 may include, but is not limited to, an electrical connector sheet, an electrical connector plate, an electrical connector block, an electrical connector strip, or an electrical connector wire, as long as it can fix all the sheet units 122 together. The specific details can be adjusted and set according to actual needs.

[0077] To ensure good connection stability and save materials, the electrical connector 123 in this embodiment is, for example, an electrical connector piece. Optionally, the number of electrical connector pieces can be, for example, one, two, three, or other quantities, which can be flexibly adjusted and set according to actual needs.

[0078] Please see Figures 3 to 5 or Figure 12 and Figure 13As an example, two electrical connecting pieces are provided. One electrical connecting piece is connected to one end of each sheet unit 122 along its length, and the other electrical connecting piece is connected to the other end of each sheet unit 122. In this way, one end of each sheet unit 122 is connected and fixed by one electrical connecting piece, and the other end is connected and fixed by the other electrical connecting piece. This not only allows all sheet units 122 to be fixedly combined together, but also ensures that the potential at the same end of each sheet unit 122 is equal, thereby improving the contact stability and reliability between the first contact portion 111 and the second contact portion 121. Furthermore, compared to covering one end of the sheet unit 122 to the other end with the electrical connecting piece, the amount of material used for the electrical connecting piece is smaller, resulting in lower costs. In addition, the arc-blocking groove 124 formed by the cooperation of the two sheet units 122 extends from one end of the sheet unit 122 to the other end. The arc-blocking groove 124 has a relatively large length and provides better arc-breaking and arc-blocking effects.

[0079] Based on the foregoing embodiments, the electrical connector can be configured as a straight connector, specifically as follows: Figures 3 to 5 As shown. Thus, when two sheet units 122 are connected by a straight connecting piece, the spacing between the two sheet units 122 cannot be adjusted, so the width of the arc-blocking groove 124 remains constant.

[0080] The electrical connector can also be configured as a curved connector, such as a C-shaped elastic spring, for example... Figure 12 and Figure 13 As shown. Thus, when two sheet units 122 are connected by a bending connecting piece, the spacing between the two sheet units 122 can be flexibly adjusted and set according to actual needs. In this way, the width of the arc-breaking groove 124 can be adjusted adaptively, thereby adjusting the arc-breaking and arc-breaking effect of the arc-breaking groove 124 and improving the arc-breaking and arc-breaking effect.

[0081] As an optional option, please refer to Figure 6 and Figure 7 The electrical connecting piece is not limited to two pieces as in the above embodiments; it can also be one piece to achieve a whole-piece connection. Specifically, the electrical connecting piece extends along the length direction of the sheet unit 122, from one end of the sheet unit 122 to the other end, and both ends of each sheet unit 122 along the length direction are connected to the same electrical connecting piece. In this way, each sheet unit 122 can be stably connected and fixed to the same electrical connecting piece. In addition, the arc-blocking groove 124 formed by the cooperation of two sheet units 122 extends from one end of the sheet unit 122 to the other end. The arc-blocking groove 124 has a large length and has a good arc-breaking and arc-blocking effect.

[0082] It should be noted that the electrical connector 123 and the sheet unit 122 are each made of high-temperature resistant metal, including but not limited to copper, iron, etc. In this way, the moving spring 12 can withstand high temperatures during use and is not prone to melting, deformation, or damage.

[0083] It should be noted that there are many ways to fix the electrical connector to the sheet unit 122, including but not limited to using fasteners 125 such as rivets, pins, screws, bolts or clips for fixing, or using welding connection, or integral processing by die casting, forging or other methods.

[0084] Please see Figure 4 For example, the movable spring 12 also includes a plurality of fasteners 125. The plurality of fasteners 125 are correspondingly provided with a plurality of sheet units 122, and each sheet unit 122 is fixedly connected to the electrical connector 123 by the corresponding fastener 125. In this way, the sheet units 122 and the electrical connector 123 are each manufactured and processed independently, and then assembled together by the fasteners 125, reducing the processing difficulty compared to a one-piece molding process. Furthermore, compared to welding or bonding methods, the method of connection using fasteners 125 allows the movable spring 12 to withstand high temperatures and is less prone to deformation and damage.

[0085] Based on the aforementioned embodiments, the sheet unit 122 and the fastener 125 can be in a one-to-one correspondence or a one-to-many relationship, as long as the sheet unit 122 and the electrical connector 123 are securely connected.

[0086] In another embodiment, the electrical connector 123 is not limited to the side of the sheet unit 122 opposite to the first contact portion 111 as described in the above embodiment. Please refer to... Figures 8 to 11 or Figure 14 and Figure 15 The electrical connector 123 can also be disposed at the interval between two adjacent sheet units 122. The sidewalls of the two sheet units 122 facing each other are connected by the electrical connector 123, and the electrical connector 123 and the two sheet units 122 are an integrated structure. In this way, the interval between the two adjacent sheet units 122, which is also the arc-blocking groove 124, can play a role in arc blocking and arc interruption. In addition, the two adjacent sheet units 122 are stably connected and combined together by the electrical connector 123.

[0087] Based on the foregoing embodiments, please refer to Figures 8 to 11The electrical connector 123 and the two sheet units 122 can be integrally processed by various methods such as die casting, stamping, laser etching, milling, and forging. In this embodiment, after providing the metal sheet to be processed, an arc-blocking groove 124 arranged along the length direction can be processed on the metal sheet by laser etching or milling. After the arc-blocking groove 124 is processed, the movable spring 12 including the electrical connector 123 and the two sheet units 122 can be obtained.

[0088] Please see Figure 8 and Figure 9 Based on the aforementioned embodiment, the electrical connector 123 is disposed at the middle portion of the sheet unit 122 along the length direction. In this way, the middle portions of the two sheet units 122 along the length direction are connected as one unit by the electrical connector 123, and arc-blocking grooves 124 are formed at both opposite ends of the two sheet units 122 along the length direction, which can both play the role of arc blocking and arc breaking.

[0089] Please see Figure 10 and Figure 11 For example, multiple electrical connectors 123 are arranged sequentially at intervals along the length of the sheet unit 122. Thus, two sheet units 122 and the multiple electrical connectors 123 arranged sequentially at intervals between them cooperate to form multiple arc-blocking grooves 124, all of which can function as arc-breaking grooves. Furthermore, the connection between the two sheet units 122 via multiple electrical connectors 123 not only provides a stable connection but also results in a large current-carrying cross-sectional area, thus not affecting temperature rise.

[0090] Please see Figure 10 and Figure 11 As an example, there may be three electrical connectors 123 between two sheet units 122, and four arc-blocking grooves 124 accordingly. Of course, when there is one electrical connector 123 between two sheet units 122, there may be two arc-blocking grooves 124 accordingly.

[0091] Please see Figure 9 or Figure 11 For example, the movable spring 12 has a positioning recess 126 on the side facing away from the first contact portion 111. The positioning recess 126 is recessed towards the first contact portion 111 and is used to position and engage with the push rod 22 of the push assembly 20. In this way, the push rod 22 of the push assembly 20 can be installed in the positioning recess 126, thereby being stably assembled with the movable spring 12.

[0092] Please see Figure 14 and Figure 15The electrical connectors 123 can be multiple, wherein two electrical connectors 123 can be disposed on the side of the sheet unit 122 away from the first contact portion 111 and located at opposite ends of the sheet unit 122, and are connected and fixed, for example, by fasteners 125; the other sheet unit 122 can be disposed between two adjacent sheet units 122 and is integrally formed with the sheet unit 122, for example.

[0093] Please see Figure 16 In some embodiments, the distance between the two inner sidewalls of the arc-breaking groove 124 is set to W, where 1.5mm ≤ W ≤ 15mm. Specifically, W includes, but is not limited to, 1.5mm, 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, or 15mm, etc. Thus, when W is small, for example, less than 1.5mm, the arc-breaking and arc-breaking effects of the arc-breaking groove 124 are weakened; when W is large, for example, greater than 15mm, although the arc-breaking and arc-breaking effects of the arc-breaking groove 124 are obvious, the current-carrying cross-sectional area is relatively small for the same volumetric size of the moving spring 12, thereby increasing the current-carrying temperature rise. Of course, as some optional solutions, W can also be set to any value less than 1.5mm or greater than 15mm.

[0094] See Figure 6 and Figure 7 Optionally, the arc-blocking groove 124 can be a blind groove. Of course, the arc-blocking groove 124 can also be a through groove, such as... Figure 8 As shown, the arc-blocking groove 124 penetrates the moving spring 12 along the thickness direction of the moving spring 12.

[0095] Based on any of the foregoing embodiments, the arc-isolating groove 124 can be a groove that is closed on all four sides, such as... Figure 10 As shown. Of course, the arc-blocking groove 124 can also be a groove that is not closed on all sides.

[0096] When the arc-blocking groove 124 is configured as a non-enclosed groove on all four sides, the notch side of the arc-blocking groove 124 is located at the outer edge of the second contact portion 121, specifically as follows: Figures 8 to 10 As shown, the arc-blocking groove 124 extends to the outer edge of the second contact portion 121. Of course, the notch side 131 of the arc-blocking groove 124 can also be provided at other edge positions of the contact unit, which is not specifically limited here.

[0097] It should be noted that "enclosed on all four sides" in the context of a tank means that if a point is selected on the side wall of the tank as the starting point, and one moves from the starting point along the circumference of the side wall of the tank, one can eventually return to that starting point. Conversely, "non-enclosed on all four sides" in the context of a tank means that if a point is selected on the side wall of the tank as the starting point, and one moves from the starting point along the circumference of the side wall of the tank, one cannot eventually return to that starting point.

[0098] It should be noted that the outer edge of the second contact portion 121 refers to the edge of the second contact portion 121 that faces away from the central axis of the moving spring 12.

[0099] Based on any of the foregoing embodiments, the outline shape of the arc-blocking groove 124 includes, but is not limited to, regular shapes such as polygons, circles, semicircles, U-shapes, or Ω-shapes, as well as other irregular shapes. Among them, polygons include, but are not limited to, rectangles, trapezoids, or triangles, etc.

[0100] For example, when an arc-blocking groove 124 is provided at a relatively weak magnetic field strength location on the outer side of the second contact portion 121, the arc-blocking groove 124 at this location is not limited to one, but can be, for example, multiple. The multiple arc-blocking grooves 124 are arranged sequentially along the width direction of the second contact portion 121. With this arrangement, the second contact portion 121 has multiple arc-breaking and arc-blocking functions along its width direction, thereby improving the arc-blocking effect.

[0101] It should be noted that the relatively weak magnetic field can be a place where at least one of the first contact portion 111 and the second contact portion 121 has a magnetic field but is relatively weak, or a place where there is no magnetic field.

[0102] When the arc-blocking groove 124 is located at the middle portion of the second contact portion 121 along its width direction, that is, the outer portion of the second contact portion 121 has the arc-blocking groove 124 at the middle portion along its width direction, and the two side portions along the width direction are respectively two abutting unit portions 1211, with the arc-blocking groove 124 located between the two abutting unit portions 1211. The surfaces of the two abutting unit portions 1211 can be flush, so that when the contact unit is conductive, both abutting unit portions 1211 can make electrical contact with the first contact portion 111, thereby reducing the contact resistance in parallel. Of course, the surfaces of the two abutting unit portions 1211 can also have a height difference along the thickness direction of the moving spring 12, for example, 0.1mm to 0.3mm, specifically 0.1mm, 0.2mm, or 0.3mm, etc. Thus, when the contact unit is closed, one of the abutting unit parts 1211 makes electrical contact with the first contact part 111, while the other abutting unit part 1211 does not make electrical contact with the first contact part 111, thereby controlling the position of the arc starting point.

[0103] To make the principle of the arc-blocking groove 124 clearer, please refer to... Figures 16 to 19 This embodiment uses two contact units as an example, with two arc initiation points, such as points B and C, to illustrate the specific principles of arc breaking and arc isolation. When the two contact units disconnect synchronously, the arcs at the two arc initiation points will be blown away diagonally under the guidance of the first permanent magnet 30. Please refer to [link to relevant documentation]. Figure 16The electric arc at point B, for example, extends into the air at a downward-sloping angle to the left, such as... Figure 16 The direction indicated by the dashed arrow at point B. The electric arc at point C, for example, extends diagonally upwards and into the air, as shown... Figure 3 The direction indicated by the dashed arrow at point C. This allows the electric arcs generated at points B and C to enter the air, thus achieving arc breaking and extinguishing. Please refer to... Figure 17 When the direction of the current is changed, that is, when the direction of the current is reversed, the direction of the electric arc at point B changes accordingly, for example, extending obliquely to the upper left, as... Figure 17 The dashed arrow at point B indicates that the arc generated at point B needs to cross the arc-blocking groove 124 and will be interrupted by the arc-blocking groove 124. Furthermore, the arc direction at point C changes accordingly, for example, extending obliquely to the lower right. Figure 17 The direction indicated by the dashed arrow at point C indicates that the electric arc generated at point C needs to cross the arc-blocking groove 124 and will be interrupted by the arc-blocking groove 124.

[0104] Please see Figure 18 and Figure 19 The two arc initiation points can also be, for example, points A and D. When the two contact units disconnect synchronously, the arcs at the two initiation points will be blown away diagonally under the guidance of the first permanent magnet 30. Please refer to [the relevant documentation / reference]. Figure 18 The electric arc at point A extends into the air, for example, at an upward-sloping angle to the left. Figure 18 The direction indicated by the dashed arrow at point A. The electric arc at point D, for example, extends into the air at a downward-sloping rightward angle, as... Figure 18 The direction indicated by the dashed arrow at point D. This allows the electric arcs generated at points A and D to enter the air, thus achieving arc breaking and extinguishing. Please refer to... Figure 19 When the direction of the current is changed, that is, when the direction of the current is reversed, the direction of the electric arc at point A changes accordingly, for example, extending obliquely to the lower left. Figure 19 The dashed arrow at point A indicates that the arc generated at point A needs to cross the arc-blocking groove 124 and will be interrupted by the arc-blocking groove 124. Furthermore, the arc direction at point D changes accordingly, for example, extending obliquely to the upper right. Figure 19 The direction indicated by the dashed arrow at point D indicates that the electric arc generated at point D needs to cross the arc-blocking groove 124 and will be interrupted by the arc-blocking groove 124.

[0105] It can be seen that the arc-blocking groove 124 is located close to the arc-starting point, which can promptly and quickly interrupt, block, and extinguish the arc generated at the arc-starting point. This can prevent the arc from burning the inner cavity 50 or even burning through the inner cavity 50, and can also prevent the arc from contacting the first permanent magnet 30, which could lead to demagnetization.

[0106] Please see Figure 2 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.

[0107] Please refer to the following: Figure 2 The second permanent magnet 40 is positioned between the two stationary contact leads 11, and the magnetic properties of the two opposing surfaces of the second permanent magnet 40 and the first permanent magnet 30 are opposite.

[0108] 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.

[0109] 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.

[0110] For example, the number of a set 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.

[0111] For example, the magnetic force of the first permanent magnet 30 is stronger than that of the second permanent magnet 40.

[0112] Please see Figure 22In some embodiments, the relay further includes an inner cavity 50 and a base 60. The inner cavity 50 is connected to and encloses the base 60 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 inside 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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 moving spring. The stationary contact lead-out end is provided with a first contact portion, and the moving spring is provided with a second contact portion corresponding to the position of the first contact portion. The moving spring includes at least two sheet units arranged side by side at intervals along its width direction and an electrical connector. The at least two sheet units are connected and fixed by the electrical connector, and two adjacent sheet units cooperate to form an arc-blocking groove. and A first permanent magnet is disposed around the movable reed.

2. The relay according to claim 1, characterized in that, The arc-blocking groove extends to the outer edge of the second contact portion; and / or, the moving spring has a symmetrical structure.

3. The relay according to claim 1, characterized in that, The electrical connector is connected to the side of the sheet unit opposite to the first contact portion.

4. The relay according to claim 3, characterized in that, The electrical connector is an electrical connector piece; there are two electrical connector pieces, one of which is connected to one end of each sheet unit along its length, and the other is connected to the other end of each sheet unit; or, there is one electrical connector piece, and both opposite ends of each sheet unit along its length are connected to the electrical connector piece.

5. The relay according to claim 4, characterized in that, The electrical connector is configured as a straight connector or a curved connector.

6. The relay according to claim 3, characterized in that, The movable spring also includes a plurality of fasteners, which are correspondingly provided with a plurality of sheet units, and each sheet unit is fixedly connected to the electrical connector through the corresponding fastener.

7. The relay according to claim 1, characterized in that, The electrical connector is located at the interval between two adjacent sheet units, and the sidewalls of the two sheet units facing each other are connected by the electrical connector. The electrical connector and the two sheet units are an integrated structure.

8. The relay according to claim 7, characterized in that, There are multiple electrical connectors, which are arranged at intervals along the length of the sheet unit.

9. The relay according to claim 7, characterized in that, The movable spring has a positioning recess on the side facing away from the first contact portion. The positioning recess is recessed in the direction of the first contact portion and is used to position and cooperate with the push rod of the push assembly.

10. The relay according to claim 1, characterized in that, The outer portion of the first contact portion and the outer portion of the second contact portion abut against each other, and the arc-blocking groove is formed in the part of the outer portion of the second contact portion where the magnetic field strength is relatively weak.

11. The relay according to claim 10, characterized in that, The outer part of the second contact portion with a relatively large magnetic field strength is provided with an abutting unit portion, which abuts against the outer part of the first contact portion; there are two abutting units, and the arc-blocking groove is provided between the two abutting units.

12. The relay according to claim 1, characterized in that, The distance between the two opposite inner sidewalls of the arc-isolating groove is set as W, where W≥1.5mm.

13. The relay according to claim 1, characterized in that, The arc-blocking groove is a blind groove or a through groove; the arc-blocking groove is a groove that is closed on all four sides, or the arc-blocking groove is a groove that is not closed on all four sides; the outline shape of the arc-blocking groove is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped or Ω-shaped.

14. The relay according to claim 1, characterized in that, The first contact portion and the second contact portion contact each other to form a contact unit; the polar side of the first permanent magnet faces the contact unit.

15. The relay according to claim 14, characterized in that, The relay further includes a second permanent magnet, which is disposed corresponding to the contact unit. The second permanent magnet is located on the side of the contact unit away from the first permanent magnet. The polarized side of the second permanent magnet faces the corresponding contact unit, and the polarity of the side of the second permanent magnet facing the contact unit is opposite to the polarity of the side of the first permanent magnet facing the contact unit.

16. 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 provided in a one-to-one correspondence with the two second contact portions.

17. The relay according to claim 16, 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.

18. The relay according to claim 17, characterized in that, The number of the first permanent magnets is adjustable; and / or, the magnetic force of the first permanent magnets is stronger than that of the second permanent magnets.

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