relay

Abstract

The application relates to a relay, a first avoiding part can play the roles of separating, lengthening and blocking an arc, the arc burning time is reduced, and the position of an arc starting point can be controlled. In addition, the first avoiding part is formed at a position with relatively weak magnetic field intensity of at least one of the first contact part and the second contact part, so that the arc starting point position can be controlled at a position with relatively high magnetic field intensity, thereby having a strong arc starting effect, meanwhile, the first avoiding part is adjacent to the arc starting point position, quick arc breaking can be realized, the arc separation effect is obvious, arc ablation of an inner cavity and explosion of the relay and other defects can be effectively avoided, the product performance can be ensured even under high load, and the product failure probability 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, and 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 spring, and a first clearance portion is formed at the part of at least one of the first contact portion and the second contact portion where the magnetic field strength is relatively weak.

[0009] 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 first clearance portion is disposed on at least one of the outer portions of the first contact portion and the outer portion of the second contact portion.

[0010] In one embodiment, the first clearance portion is disposed on the outer side of the first contact portion, and a first abutting unit portion is provided on the outer side of the first contact portion where the magnetic field strength is relatively large, and the first abutting unit portion abuts and cooperates with the outer side of the second contact portion.

[0011] In one embodiment, there are two first abutting units, and the first clearance portion is disposed between the two first abutting units; or, there is one first abutting unit, and the first clearance portion of the first contact portion is one, with the first clearance portion disposed at any end of the first contact portion along the width direction of the movable spring.

[0012] In one embodiment, the first clearance portion is disposed on the outer side of the second contact portion, and a second abutting unit portion is provided on the outer side of the second contact portion where the magnetic field strength is relatively large, and the second abutting unit portion abuts and cooperates with the outer side of the first contact portion.

[0013] In one embodiment, there are two second abutting units, and the first clearance portion is disposed between the two second abutting units; or, there is one second abutting unit and one first clearance portion, and the first clearance portion is disposed at any end of the second contact portion along the width direction of the movable spring.

[0014] In one embodiment, there are multiple first clearance portions, which are arranged sequentially along the width direction of the movable spring.

[0015] 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.

[0016] In one embodiment, the first clearance portion is disposed directly opposite the middle portion of the polarized side of the first permanent magnet, or the polarized side of the first permanent magnet is disposed offset from the first clearance portion.

[0017] In one embodiment, the first clearance portion includes one or more combinations of clearance groove, clearance hole and clearance notch.

[0018] In one embodiment, the clearance groove is a blind groove or a through groove; the clearance groove is a groove that is closed on all four sides, or the clearance groove is a groove that is not closed on all four sides.

[0019] In one embodiment, the outline shape of the first avoidance part is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped.

[0020] In one embodiment, the movable spring is provided with a second clearance portion, which is arranged on the second contact portion on one side close to the central axis of the movable spring.

[0021] In one embodiment, the two opposite ends of the second clearance portion extend to two opposite sides of the movable spring along its width direction.

[0022] In one embodiment, the second clearance portion is configured as a clearance groove, and the depth of the second clearance portion increases from its middle position to any one end.

[0023] In one embodiment, the second clearance portion is provided as a clearance groove, clearance hole or clearance notch; the outline shape of the second clearance portion is arc-shaped, rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped or Ω-shaped.

[0024] In one embodiment, at least one of the first contact portion and the second contact portion is provided with a third avoidance portion to avoid each other, the third avoidance portion being located on the side of the first avoidance portion away from the direction of the magnetic field of the first permanent magnet.

[0025] In one embodiment, the opposite ends of the third clearance portion on the first contact portion extend to two opposite sides of the first contact portion along the width direction of the movable spring; and / or, the opposite ends of the third clearance portion on the second contact portion extend to two opposite sides of the second contact portion along the width direction of the movable spring.

[0026] In one embodiment, the third clearance portion is provided as a clearance groove, clearance hole or clearance notch; the outline shape of the third clearance portion is arc-shaped, rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped or Ω-shaped.

[0027] 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 respectively arranged on the outer side of the opposite ends of the moving spring along its length. The two groups of the first permanent magnet are respectively arranged in a one-to-one correspondence with the two second contact portions.

[0028] 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.

[0029] 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.

[0030] 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 blowing and pulling the arc. As the arc moves along the contact surface, when it reaches the first clearance part, the first clearance part can separate, lengthen, and block the arc, reducing the arcing time and controlling the position of the arc ignition point. Furthermore, because the first clearance part is designed 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 position is more controlled, resulting in a significant arc-blocking effect. Furthermore, since a first clearance portion is formed at the relatively weaker magnetic field strength of at least one of the first and second contact portions, the arc initiation point can be controlled at the relatively higher magnetic field strength, thus providing a stronger arc-initiating effect. Simultaneously, the proximity of the first clearance portion to the arc initiation point enables rapid arc extinguishing, resulting in a more significant arc-blocking effect. This effectively prevents defects such as arc erosion of the internal cavity and relay explosion, ensuring product performance even under high loads and reducing the probability of product failure. Additionally, the segmentation of the contact portion by the first clearance portion inevitably creates multiple sets of contact points. These multiple sets of contact points have a current-shunting effect, reducing contact resistance and thus lowering temperature rise. Attached Figure Description

[0031] Figure 1 This is a structural diagram of a relay according to an embodiment of this application.

[0032] Figure 2 This is a structural diagram of a relay according to another embodiment of this application.

[0033] Figure 3 for Figure 1 The arc direction pattern of one embodiment of the relay shown.

[0034] Figure 4 for Figure 1 The arc direction pattern of another embodiment of the relay shown.

[0035] Figure 5 for Figure 1 The arc direction diagram of another embodiment of the relay shown.

[0036] Figure 6 for Figure 1The arc direction pattern of another embodiment of the relay shown.

[0037] Figure 7 for Figure 2 The arc direction pattern of one embodiment of the relay shown.

[0038] Figure 8 This is a structural diagram of the movable spring in the first embodiment of this application.

[0039] Figure 9 This is a structural diagram of the movable spring in the second embodiment of this application.

[0040] Figure 10 This is a structural diagram of the movable spring according to the third embodiment of this application.

[0041] Figure 11 This is a structural diagram of the movable spring in the fourth embodiment of this application.

[0042] Figure 12 for Figure 11 The diagram shows another perspective of the moving spring.

[0043] Figure 13 for Figure 12 Sectional view of the structure at EE.

[0044] Figure 14 for Figure 12 Cross-sectional view of the structure at FF.

[0045] Figure 15 This is a structural diagram of the movable spring in the fifth embodiment of this application.

[0046] Figure 16 This is a structural diagram of the movable spring in the sixth embodiment of this application.

[0047] Figure 17 This is a structural diagram of the movable spring in the seventh embodiment of this application.

[0048] Figure 18 This is a structural diagram of the movable spring in the eighth embodiment of this application.

[0049] Figure 19 This is a structural diagram of the movable spring in the ninth embodiment of this application.

[0050] Figure 20 This is a structural diagram of the movable spring in the tenth embodiment of this application.

[0051] Figure 21 This is a structural diagram of the movable spring in the eleventh embodiment of this application.

[0052] Figure 22 This is a structural diagram of the movable spring in the twelfth embodiment of this application.

[0053] Figure 23 This is a structural diagram of the movable spring in the thirteenth embodiment of this application.

[0054] Figure 24 This is a structural diagram of the movable spring in the fourteenth embodiment of this application.

[0055] Figure 25 This is a structural diagram of the movable spring in the fifteenth embodiment of this application.

[0056] Figure 26 This is a structural diagram of the movable spring in the sixteenth embodiment of this application.

[0057] Figure 27 This is a structural diagram of the movable spring in the seventeenth embodiment of this application.

[0058] Figure 28 This is a structural diagram of the movable spring in the eighteenth embodiment of this application.

[0059] Figure 29 This is a structural diagram of the movable spring in the nineteenth embodiment of this application.

[0060] Figure 30 This is a structural diagram of the movable spring in the twentieth embodiment of this application.

[0061] Figure 31 This is a structural diagram of a relay according to another embodiment of this application.

[0062] Figure 32 for Figure 31 The diagram shows another view of the relay's structure.

[0063] Figure 33 for Figure 31 The diagram shows another perspective of the relay's structure.

[0064] Figure 34 for Figure 31 The image shows a bottom view of the stationary contact lead-out terminal in the relay.

[0065] Figure 35 This is a structural diagram of a relay according to another embodiment of this application.

[0066] Figure 36 for Figure 35 The diagram shows another view of the relay's structure.

[0067] Figure 37 for Figure 35 The diagram shows another perspective of the relay's structure.

[0068] Figure 38 This is a structural diagram showing the arrangement of the first permanent magnet in an embodiment of this application.

[0069] Figure 39This is a structural diagram showing the arrangement of the first permanent magnet in another embodiment of this application.

[0070] Figure 40 This is a cross-sectional view of a relay according to an embodiment of this application.

[0071] 10. Contact assembly; 11. Stationary contact lead-out end; 111. First contact portion; 12. Moving spring; 121. Second contact portion; 1211. Second protrusion; 1212. Second abutment unit portion; 13. First clearance portion; 131. Notch side; 14. Second clearance portion; 15. Third clearance portion; 20. Push assembly; 21. Coil; 22. Push rod; 30. First permanent magnet; 40. Second permanent magnet; 50. Inner cavity; 60. Base. Detailed Implementation

[0072] 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.

[0073] This embodiment provides a relay, such as Figure 1 or Figure 2 and Figure 40 As shown, Figure 1 and Figure 2 The following are schematic diagrams of the relay structure in two different embodiments of this application. Figure 40 A cross-sectional view of the relay is shown. 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.

[0074] 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.

[0075] Please see Figure 1 and Figure 3 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, 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Define the arrangement direction of the two contact elements as the first direction, as follows: Figure 1 The double arrow x is shown in the diagram; the second direction is as follows: Figure 1As 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 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.

[0080] 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 1 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 1 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 1 The double arrow z is shown in the diagram. Furthermore, when the movable reed 12 is configured as a curved piece, specifically a U-shaped curved piece, such as... Figure 30 As shown, the two opposite ends of the moving spring 12 protrude toward the two first contact portions 111 respectively, and the portion between the two opposite ends of the moving spring 12, that is, the middle portion of the moving spring 12, is recessed toward the direction away from the stationary contact lead-out end 11.

[0081] 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.

[0082] 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.

[0083] For the reasons mentioned above, this application provides a relay that can effectively improve the effects of arc blowing, arc pulling, arc blocking and arc breaking, and meet the technical solution of high load capacity requirements.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] Of course, the two sets of first permanent magnets 30 are not limited to such Figure 1 and Figure 2 The arrangement method is not limited to this; other arrangements are also possible, for example, see [reference needed]. Figure 38 and Figure 39 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.

[0088] In this embodiment, a first clearance portion 13 is formed at the location where the magnetic field strength of at least one of the first contact portion 111 and the second contact portion 121 is relatively weak. The first clearance portion 13 is located on the magnetic blow-out path, which helps to separate, lengthen and block the electric arc, thereby reducing the arcing time.

[0089] 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.

[0090] It should also be noted that the curvature at both ends of the first permanent magnet 13 is larger, resulting in a more pronounced edge effect and easier concentration of magnetic field lines, thus enhancing the surface magnetism. In contrast, the curvature in the central region of the first permanent magnet 13 is smaller, the magnetic field lines are more evenly distributed, and the surface magnetism is weaker.

[0091] 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.

[0092] Optionally, please refer to Figure 1 and Figure 2 Or refer to Figure 39The first clearance portion 13 is positioned directly opposite the middle portion of the polarized side of the first permanent magnet 30. This ensures that the magnetic field strength of the first clearance portion 13 is less than that of other portions outside the first contact portion 111 and the second contact portion 121.

[0093] Optionally, please refer to Figure 38 The polarized side of the first permanent magnet 13 is offset from the first clearance portion 30. In this way, the magnetic field strength of the first clearance portion 30 is weaker, or even non-existent, while the other parts of the outer side of the first contact portion 111 and the second contact portion 121 have a higher magnetic field strength than the first clearance portion 30 because they are arranged opposite to the first permanent magnet 13.

[0094] In some embodiments, the outer portion of the first contact portion 111 and the outer portion of the second contact portion 121 abut against each other, and the first clearance portion 13 is disposed on at least one of the outer portions of the first contact portion 111 and the outer portions of the second contact portion 121. Alternatively, the inner portion of the first contact portion 111 and the inner portion of the second contact portion 121 abut against each other, and the first clearance portion 13 may be disposed on at least one of the inner portions of the first contact portion 111 and the inner portions of the second contact portion 121.

[0095] For example, please refer to Figures 35 to 37 When the first clearance part 13 is provided on the outer side of the first contact part 111, the first clearance part 13 can correspondingly avoid the second contact part 121. The part with higher magnetic field strength in the outer side of the first contact part 111 does not have the first clearance part 13, and thus makes contact with the outer side of the second contact part 121.

[0096] For example, please refer to Figures 1 to 3 When the first clearance part 13 is provided on the outer side of the second contact part 121, the first clearance part 13 can correspondingly avoid the first contact part 111. The part with higher magnetic field strength on the outer side of the second contact part 121 does not have the first clearance part 13 provided, and thus makes contact with the outer side of the first contact part 111.

[0097] For example, please refer to Figures 31 to 34 When the outer side of the first contact portion 111 and the outer side of the second contact portion 121 are both provided with the first clearance portion 13, the first clearance portion 13 on the first contact portion 111 and the second clearance portion 14 on the second contact portion 121 can be arranged either aligned or misaligned. There is no limitation here. The specific arrangement can be flexibly adjusted and set according to the actual magnetic field strength distribution.

[0098] 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.

[0099] In the aforementioned relay, when the first contact portion 111 and the second contact portion 121 separate or come into contact with each other, causing an arc to be generated at the contact unit, the magnetic field generated by the first permanent magnet 30 can exert a traction effect on the arc, achieving the effects of blowing and pulling the arc. The arc moves along the contact surface of the contact unit. When the arc moves to the first clearance portion 13, the first clearance portion 13 can separate, lengthen, and block the arc, reducing the arcing time and controlling the position of the arc initiation point. Furthermore, because the first clearance portion 13 is set according to the magnetic blowing path, the positions of the first contact portion 111 and the second contact portion 121 are relatively controllable, and the contact area is relatively small, thus the position of the arc initiation point is more controllable, resulting in a significant arc-blocking effect. Furthermore, since a first clearance portion 13 is formed at the location where the magnetic field strength of at least one of the first contact portion 111 and the second contact portion 121 is relatively weak, the arc initiation point can be controlled at the location where the magnetic field strength is relatively high, thus having a strong arc initiation effect. At the same time, the first clearance portion 13 is adjacent to the arc initiation point, which enables rapid arc extinguishing, resulting in a significant arc isolation effect. This effectively avoids defects such as arc erosion of the inner cavity 50 and relay explosion, ensuring product performance even under high load and reducing the probability of product failure. In addition, the first clearance portion 13 segments the contact portion, inevitably creating multiple sets of contact points. Multiple sets of contact points have a current shunting effect, reducing contact resistance and thus reducing temperature rise.

[0100] In one specific embodiment, the first avoidance part 13 is disposed on the outer side of the first contact part 111, and the outer side of the first contact part 111 with a relatively large magnetic field strength is provided with a first abutting unit part, which abuts and cooperates with the outer side of the second contact part 121.

[0101] Based on the aforementioned embodiments, when the magnetic field strength of the outer portion of the first contact portion 111 is distributed in a strong-weak-strong pattern along the width direction of the moving spring 12, two first abutting units are correspondingly provided, and the two first abutting units are respectively arranged on two opposite sides of the outer portion of the first contact portion 111 along the width direction of the moving spring 12. Furthermore, a first clearance portion 13 is arranged at the middle portion of the outer portion of the first contact portion 111 along the width direction of the moving spring 12. The first clearance portion 13 of the first contact portion 111 is correspondingly positioned between the two first abutting units. In this way, not only can a better arc-breaking and arc-isolating effect be achieved, but also when the contact unit is closed, both first abutting units simultaneously make electrical contact with the second contact portion 121, thereby achieving a parallel current-splitting effect, reducing contact resistance, and improving stability.

[0102] Of course, 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 movable spring 12, the magnetic field strength distribution of the outer part of the first contact portion 111 along the width direction of the movable spring 12 can be adjusted accordingly, as can the magnetic field strength distribution of the outer part of the second contact portion 121 along the width direction of the movable spring 12. Specifically, when the magnetic field strength distribution of the outer part of the first contact portion 111 along the width direction of the movable spring 12 is either weak-strong or strong-weak, one first abutting unit is provided, and a first clearance portion 13 is provided at the end of the first contact portion 111 along the width direction of the movable spring 12 according to the high and low magnetic field strength distribution on the outer part of the first contact portion 111.

[0103] Similarly, please see Figure 1 and Figure 3 The first avoidance part 13 can also be provided on the outer side of the second contact part 121. The second abutting unit part 1212 is provided on the outer side of the second contact part 121 where the magnetic field strength is relatively large. The second abutting unit part 1212 abuts and cooperates with the outer side of the first contact part 111.

[0104] Based on the aforementioned embodiments, when the magnetic field strength of the outer portion of the second contact portion 121 is distributed in a strong-weak-strong pattern along the width direction of the moving spring 12, two second abutment units 1212 are correspondingly provided, and the two second abutment units 1212 are respectively arranged on two opposite sides of the outer portion of the second contact portion 121 along the width direction of the moving spring 12. Furthermore, a first clearance portion 13 is arranged at the middle portion of the outer portion of the second contact portion 121 along the width direction of the moving spring 12. The first clearance portion 13 of the second contact portion 121 is correspondingly disposed between the two second abutment units 1212. In this way, not only can a better arc-breaking and arc-isolating effect be achieved, but also when the contact unit is closed, both second abutment units 1212 simultaneously make electrical contact with the first contact portion 111, thereby playing a parallel current-splitting role, reducing contact resistance, and improving stability.

[0105] Of course, by adjusting the position of the first permanent magnet 30, for example, adjusting the position of the first permanent magnet 30 in the width direction of the movable spring 12, the magnetic field strength distribution of the outer part of the first contact portion 111 along the width direction of the movable spring 12 can be adjusted accordingly, and the magnetic field strength distribution of the outer part of the second contact portion 121 along the width direction of the movable spring 12 can also be adjusted accordingly. Please refer to [link / reference needed]. Figure 22 and Figure 23 When the magnetic field strength of the outer part of the second contact portion 121 is distributed in a weak-strong or strong-weak manner along the width direction of the moving spring 12, a second abutting unit portion 1212 is provided accordingly, and the first clearance portion 13 is provided at the end of the second contact portion 121 along the width direction of the moving spring 12 according to the high and low distribution of the magnetic field strength on the outer part of the second contact portion 121.

[0106] For example, the first clearance portion 13 may include, but is not limited to, one or more combinations of clearance grooves, clearance holes, and clearance notches, as long as they can prevent the first contact portion 111 and the second contact portion 121 from contacting each other at the position of the first clearance portion 13. Specifically, when the first clearance portion 13 is a combination of clearance grooves, clearance holes, and clearance notches, the first clearance portion 13 may be a combination of clearance grooves and clearance holes, a combination of clearance grooves and clearance notches, a combination of clearance holes and clearance notches, or may include clearance grooves, clearance holes, and clearance notches.

[0107] Specifically, in this embodiment, the first avoidance part 13 is taken as an example of an avoidance groove, as shown in the reference. Figures 8 to 30 Any image. Optionally, the clearance slot can be a blind slot, such as... Figures 8 to 10 and Figures 15 to 23 As shown. Of course, the clearance slot can also be designed as a through slot, such as... Figures 24 to 28 As shown, the clearance groove extends through the movable spring 12 along the thickness direction of the movable spring 12.

[0108] Based on any of the foregoing embodiments, the clearance groove can be a groove that is closed on all four sides, such as... Figure 29 As shown. Of course, the clearance groove can also be a groove that is not enclosed on all four sides.

[0109] 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.

[0110] When the clearance groove is configured as a groove that is not enclosed on all four sides, the notch side 131 of the clearance groove can be located at the outer edge of the contact unit, specifically as follows: Figures 8 to 10 , Figures 15 to 23 and Figures 24 to 28 As shown. Of course, the notch side 131 of the clearance groove can also be located at other edge positions of the contact unit, which is not specifically limited here.

[0111] 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.

[0112] Based on any of the foregoing embodiments, the outline shape of the first clearance portion 13 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.

[0113] For example, when a first clearance portion 13 is provided at a location on the outer side of the first contact portion 111 where the magnetic field strength is relatively weak, the first clearance portion 13 at this location is not limited to one, but can be multiple, for example. Multiple first clearance portions 13 are arranged sequentially along the width direction of the movable spring 12. The shape and size of each first clearance portion 13 can be consistent or different. With this arrangement, the first contact portion 111 has multiple arc-breaking and arc-isolating functions along the width direction of the movable spring 12, thereby improving the arc-isolating effect.

[0114] Based on the aforementioned embodiment, the first avoidance portion 13 specifically comprises two parts, which are disposed on opposite sides of the first contact portion 111 along the width direction of the moving spring 12. Thus, a first protrusion protruding towards the first permanent magnet 30 is provided at the middle position of the outer portion of the first contact portion 111. The two first avoidance portions 13 are respectively located on opposite sides of the first protrusion along the width direction of the moving spring 12. Therefore, when the contact unit is closed, the first protrusion makes electrical contact with the second contact portion 121, while both first avoidance portions 13 can avoid the second contact portion 121. This allows the electric arc generated by the first protrusion to quickly enter the air, thereby achieving rapid arc breaking and arc isolation effects.

[0115] For example, when a first clearance portion 13 is provided at a location on the outer side of the second contact portion 121 where the magnetic field strength is relatively weak, the first clearance portion 13 at this location is not limited to one, but may be multiple, for example. The multiple first clearance portions 13 are arranged sequentially along the width direction of the movable spring 12, specifically as follows: Figure 27 The arrangement shown is such that the second contact portion 121 has multiple arc-breaking and arc-isolating functions along the width direction of the moving spring 12, thereby improving the arc-isolating effect.

[0116] For example, the first clearance portion 13 on the outer side of the first contact portion 111 is not limited to multiple portions as in the above embodiments, but can also be a single portion. Furthermore, when the first clearance portion 13 on the outer side of the first contact portion 111 is a single portion, the specific location of the first clearance portion 13 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 clearance portion 13 can be located at the middle portion 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.

[0117] Similarly, the first clearance portion 13 on the outer side of the second contact portion 121 is not limited to multiple portions as in the above embodiments, but can also be a single portion. Furthermore, when the first clearance portion 13 on the outer side of the second contact portion 121 is set to a single portion, the specific location of the first clearance portion 13 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... Figures 8 to 10 and Figures 15 to 21 The first clearance portion 13 can be disposed at the middle portion of the second contact portion 121 along the width direction of the movable spring 12. Alternatively, the first clearance portion 13 can also be disposed at any end of the second contact portion 121 along the width direction of the movable spring 12, such as... Figure 22 and Figure 23 As shown, all of them can achieve the functions of arc breaking, arc isolation, and arc extinguishing.

[0118] Among them, such as Figures 8 to 10 and Figures 15 to 21 When the first clearance portion 13 is disposed at the middle portion of the second contact portion 121 along the width direction of the movable spring 12, that is, the outer portion of the second contact portion 121 along the middle portion of the width direction of the movable spring 12 has the first clearance portion 13, and the two side portions along the width direction are respectively two second abutting unit portions 1212, with the first clearance portion 13 located between the two second abutting unit portions 1212. The surfaces of the two second abutting unit portions 1212 can be flush, so that when the contact unit is conducting, the two second abutting unit portions 1212 can both make electrical contact with the first contact portion 111, thereby reducing the contact resistance by connecting in parallel. Of course, the surfaces of the two second abutting unit portions 1212 can also have a height difference along the thickness direction of the movable 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 second abutting unit parts 1212 makes electrical contact with the first contact part 111, while the other second abutting unit part 1212 does not make electrical contact with the first contact part 111, thereby controlling the position of the arc initiation point.

[0119] Please see Figure 1 , Figure 3 and Figure 4 To clarify the principle of the first avoidance part 13, 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 3 The electric arc at point B, for example, extends into the air at a downward-sloping angle to the left, such as... Figure 3 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 4 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 4 The direction indicated by the dashed arrow at point B indicates that the arc generated at point B needs to cross the first clearance part 13, where it will be interrupted by the first clearance part 13. Furthermore, the direction of the arc at point C changes accordingly, for example, extending diagonally to the lower right. Figure 4The direction indicated by the dashed arrow at point C indicates that the electric arc generated at point C needs to cross the first clearance part 13, and will be interrupted by the first clearance part 13.

[0120] Please see Figure 1 , Figure 5 and Figure 6 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 5 The electric arc at point A extends into the air, for example, at an upward-sloping angle to the left. Figure 5 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 5 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 arc extinguishing. Please refer to... Figure 6 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, as... Figure 6 The direction indicated by the dashed arrow at point A indicates that the arc generated at point A needs to cross the first clearance part 13, where it will be interrupted by the first clearance part 13. Furthermore, the direction of the arc at point D changes accordingly, for example, extending obliquely to the upper right. Figure 6 The direction indicated by the dashed arrow at point D indicates that the electric arc generated at point D needs to cross the first clearance part 13, and will be interrupted by the first clearance part 13.

[0121] It can be seen that the first clearance part 13 is close to the arc starting point, which can promptly and quickly interrupt, isolate and extinguish the arc generated at the arc starting point, thereby preventing the arc from burning the inner cavity 50 or even burning through the inner cavity 50, and also preventing the arc from contacting the first permanent magnet 30 and causing demagnetization defects.

[0122] When the electric arc is uncontrolled, or when the second permanent magnet 40 is present, or when the contacts are worn, the direction of the arc blowing is irregular. It may blow not only towards the outer part of the second contact portion 121, but also towards the inner part of the second contact portion 121, for example, see [reference]. Figure 7 An electric arc is generated at all four points (A, B, C, and D), and the arcs are all directed towards the inner side of the second contact portion 121. Therefore, optionally, the moving spring 12 is provided with a second clearance portion 14. The second clearance portion 14 is located on the inner side of the second contact portion 121. In this way, the second clearance portion 14 can also serve to isolate the arc and quickly extinguish it, greatly reducing the arcing time.

[0123] Optionally, the number of second clearance portions 14 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 second clearance portion 14 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 second clearance portion 14 can achieve the function of arc breaking and arc isolation, without the need to set more second clearance portions 14, thereby avoiding the defect of excessive current-carrying temperature rise caused by too many second clearance portions 14.

[0124] Of course, as some optional solutions, the second avoidance part 14 in this embodiment is not limited to one of the above embodiments, and can also be set to multiple. Compared with setting one second avoidance part 14, setting multiple second avoidance parts 14 can interrupt and isolate the arc layer by layer, further improving the arc interruption and arc isolation effect, but it will affect the current carrying capacity and cause the temperature to rise.

[0125] For example, the two opposite ends of the second clearance portion 14 extend to the two opposite sides of the movable spring 12 along its width direction. In this way, the second clearance portion 14 is relatively long, and the area of ​​arc breaking and arc isolation is large, thus having a better arc breaking and arc isolation effect.

[0126] Research has shown that electric arcs are relatively more likely to be directed towards the end portion of the second clearance portion 14, while relatively fewer electric arcs are directed towards the middle portion of the second clearance portion 14. Please refer to [link / reference]. Figures 11 to 14 Based on this, the second clearance portion 14 is designed as a clearance groove, and the depth of the second clearance portion 14 increases from its middle position to either end. In other words, the depth of the second clearance portion 14 is greatest at the two ends. Thus, the two ends of the second clearance portion 14 effectively interrupt and isolate the electric arc. Furthermore, the depth of the middle portion of the second clearance portion 14 is, for example, minimal, and may be flush with the surface of the moving spring 12. Thus, the arc-interrupting and arc-isolating effect of the middle portion of the second clearance portion 14 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.

[0127] For example, similar to the first clearance part 13, the second clearance part 14 may include, but is not limited to, clearance grooves, clearance holes or clearance notches, etc., and can be flexibly adjusted and set according to actual needs.

[0128] Based on any of the foregoing embodiments, the outline shape of the second avoidance part 14 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.

[0129] Please see Figure 11 , Figure 12 , Figure 23 and Figure 25 For example, at least one of the first contact portion 111 and the second contact portion 121 is provided with a third clearance portion 15 to avoid each other. The third clearance portion 15 is located on the side of the first clearance portion 13 away from the magnetic field direction of the first permanent magnet 30. In this way, on the one hand, the arc can be interrupted, thereby playing the role of arc isolation and rapid arc extinguishing, reducing the arcing time; on the other hand, since a second clearance portion 14 is further provided, the contact area between the first contact portion 111 and the second contact portion 121 is further reduced, and the arc initiation point is more controlled, so that the arc can be controlled to start at a certain point, making the arc isolation effect obvious; in addition, it can effectively prevent the arc from flowing towards the inner part of the second contact portion 121, so that the product performance can still be guaranteed even under high load, and the probability of product failure can be reduced.

[0130] For example, the opposite ends of the third clearance portion 15 on the first contact portion 111 extend to two opposite sides of the first contact portion 111 along the width direction of the movable spring 12; and / or, the opposite ends of the third clearance portion 15 on the second contact portion 121 extend to two opposite sides of the second contact portion 121 along the width direction of the movable spring 12. Thus, the third clearance portion 15 is relatively long, and the arc-breaking and arc-isolating area is large, resulting in better arc-breaking and arc-isolating effects.

[0131] When both the first contact portion 111 and the second contact portion 121 are provided with a first clearance portion 13, the first clearance portion 13 on the first contact portion 111 and the first clearance portion 13 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 first clearance portion 13 on the first contact portion 111 and the first clearance portion 13 on the second contact portion 121 can also be aligned and connected to each other.

[0132] Similarly, when both the first contact portion 111 and the second contact portion 121 are provided with a third clearance portion 15, the third clearance portion 15 on the first contact portion 111 and the third clearance portion 15 on the second contact portion 121 can be offset from each other, thus avoiding each other and achieving better arc breaking and arc isolation effects. Of course, the third clearance portion 15 on the first contact portion 111 and the third clearance portion 15 on the second contact portion 121 can also be aligned and connected to each other.

[0133] For example, similar to the first clearance part 13, the third clearance part 15 may include, but is not limited to, clearance grooves, clearance holes or clearance notches.

[0134] Based on any of the foregoing embodiments, the outline shape of the second avoidance part 14 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.

[0135] Based on the foregoing embodiments, the third clearance portion 15 is specifically located between the first clearance portion 13 and the second clearance portion 14. The number of third clearance portions 15 can be flexibly adjusted and set according to actual needs, including but not limited to one or more. For example, multiple clearance portions could be two, three, or other quantities.

[0136] Optionally, the third clearance part 15 can be interconnected with the first clearance part 13, or they can be set independently of each other; no limitation is made here.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] For example, the magnetic force of the first permanent magnet 30 is stronger than that of the second permanent magnet 40.

[0143] It should be noted that the position, number, shape, and arrangement of the first clearance part 13 and the third clearance part 15 on the moving spring 12 can be specifically referred to, for example, in [reference needed]. Figures 8 to 30 All of these can be replicated on the first contact portion 111 of the stationary contact lead-out end 11; in other words, the arrangement position, quantity, shape, and arrangement of the first clearance portion 13 and the third clearance portion 15 on the first contact portion 111 of the stationary contact lead-out end 11 can be similar to their arrangement position, quantity, shape, and arrangement on the moving spring 12. This application will not elaborate further here, nor will it provide any appendices. Figure 1 The first and third clearance portions 15 on the first contact portion 111 of the stationary contact lead-out end 11 are similar to the technical effects on the second contact portion 121, and will not be described again here.

[0144] Please see Figure 40 In 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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, 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 A first permanent magnet is disposed around the movable spring, and a first clearance portion is formed at the part of at least one of the first contact portion and the second contact portion where the magnetic field strength is relatively weak.

2. 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 first clearance portion is provided on at least one of the outer portions of the first contact portion and the outer portion of the second contact portion.

3. The relay according to claim 2, characterized in that, The first clearance portion is disposed on the outer side of the first contact portion, and the outer side of the first contact portion with a relatively large magnetic field strength is provided with a first abutting unit portion, which abuts and cooperates with the outer side of the second contact portion.

4. The relay according to claim 3, characterized in that, Two first abutting units are provided, and the first clearance portion is provided between the two first abutting units; or, one first abutting unit is provided, and one first clearance portion of the first contact portion is provided, with the first clearance portion provided at any end of the first contact portion along the width direction of the movable spring.

5. The relay according to claim 2, characterized in that, The first clearance portion is disposed on the outer side of the second contact portion, and the outer side of the second contact portion is provided with a second abutting unit portion where the magnetic field strength is relatively large. The second abutting unit portion abuts and cooperates with the outer side of the first contact portion.

6. The relay according to claim 5, characterized in that, Two second abutting units are provided, and the first clearance part is provided between the two second abutting units; or, one second abutting unit is provided, and one first clearance part is provided, with the first clearance part provided at any end of the second contact part along the width direction of the moving spring.

7. The relay according to claim 3 or 5, characterized in that, The first clearance portion is provided in multiple ways, and the multiple first clearance portions are arranged sequentially along the width direction of the moving spring.

8. 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.

9. The relay according to claim 8, characterized in that, The first clearance portion is positioned directly opposite the middle portion of the polarized side of the first permanent magnet, or the polarized side of the first permanent magnet is offset from the first clearance portion.

10. The relay according to claim 1, characterized in that, The first clearance portion includes one or more combinations of clearance groove, clearance hole and clearance notch.

11. The relay according to claim 10, characterized in that, The clearance groove is a blind groove or a through groove; the clearance groove is a groove that is closed on all four sides, or the clearance groove is a groove that is not closed on all four sides.

12. The relay according to claim 1, characterized in that, The outline shape of the first avoidance part is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped or Ω-shaped.

13. The relay according to claim 1, characterized in that, The movable spring is provided with a second clearance portion, which is arranged on the second contact portion on one side close to the central axis of the movable spring.

14. The relay according to claim 13, characterized in that, The two opposite ends of the second clearance portion extend to the two opposite sides of the moving spring along its width direction.

15. The relay according to claim 14, characterized in that, The second clearance part is configured as a clearance groove, and the depth of the second clearance part increases from its middle position to any one end.

16. The relay according to claim 13, characterized in that, The second clearance portion is provided as a clearance groove, clearance hole or clearance notch; the outline shape of the second clearance portion is arc, rectangle, trapezoid, triangle, circle, semicircle, U-shape or Ω-shape.

17. 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 third avoidance portion to avoid each other, the third avoidance portion being located on the side of the first avoidance portion away from the direction of the magnetic field of the first permanent magnet.

18. The relay according to claim 17, characterized in that, The opposite ends of the third clearance portion on the first contact portion extend to two opposite sides of the first contact portion along the width direction of the moving spring; and / or, the opposite ends of the third clearance portion on the second contact portion extend to two opposite sides of the second contact portion along the width direction of the moving spring.

19. The relay according to claim 17, characterized in that, The third clearance part is provided as a clearance groove, clearance hole or clearance notch; the outline shape of the third clearance part is arc, rectangle, trapezoid, triangle, circle, semicircle, U-shape or Ω-shape.

20. 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. The two groups of the first permanent magnet are respectively arranged on the outer side 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 with the two second contact portions.

21. The relay according to claim 20, 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.

22. The relay according to claim 21, 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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