Relay

Abstract

The utility model relates to a relay. At least one of the outer side part of a first contact part and the outer side part of a second contact part is provided with a first avoiding part for avoiding each other. When the first contact part and the second contact part are separated from each other or are in contact with each other so that an electric arc is generated at the contact unit, a magnetic field formed by the first permanent magnet can play a traction role on the electric arc, and arc blowing and arc discharge effects are achieved. The electric arc moves along the contact surface of the contact unit, when the electric arc moves to the first avoiding part, the first avoiding part can play a role in separating, lengthening and blocking the electric arc, and the arcing time is shortened. Besides, the first avoiding part is arranged according to the magnetic blow-out path, so that the positions of the first contact part and the second contact part are relatively controllable, meanwhile, the contact area is relatively small, the position of an arcing point is more controlled, and the arc isolation effect is obvious. Besides, the defects that the inner cavity is ablated by an electric arc and the relay explodes and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the failure probability of the product can be reduced.

Description

relay Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits. A high-voltage DC relay is a type of relay. A high-voltage DC relay includes a pair of stationary contacts and a moving contact. The two ends of the moving contact along its length are used to interact with the pair of stationary contacts, respectively, to connect and disconnect the load.

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

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

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

[0006] A relay, comprising:

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

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

[0009] In one embodiment, the first clearance portion includes one or more combinations of clearance groove, clearance hole and clearance notch.

[0010] In one embodiment, the clearance slot is a blind slot or a through slot.

[0011] In one embodiment, 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.

[0012] In one embodiment, the outline shape of the first avoidance part is rectangular, trapezoidal, triangular, circular, semi-circular, U-shaped, or Ω-shaped.

[0013] In one embodiment, the first clearance portion is disposed on the outer portion of the first contact portion; and / or, the first clearance portion is disposed on the outer portion of the second contact portion.

[0014] In one embodiment, the outer portion of the first contact portion has multiple first clearance portions, which are arranged sequentially along the width direction of the first contact portion; and / or, the outer portion of the second contact portion has multiple first clearance portions, which are arranged sequentially along the width direction of the second contact portion.

[0015] In one embodiment, the first clearance portion on the outer side of the first contact portion is provided as one, and the first clearance portion is provided at the middle part or any end of the first contact portion along the width direction of the movable spring; and / or, the first clearance portion on the outer side of the second contact portion is provided as one, and the first clearance portion is provided at the middle part or any end of the second contact portion along the width direction of the movable spring.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In one embodiment, the opposite ends of the third clearance portion on the first contact portion extend to two opposite sides in the width direction of the first contact portion; and / or, the opposite ends of the third clearance portion on the second contact portion extend to two opposite sides in the width direction of the second contact portion.

[0022] 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.

[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. 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.

[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 an arc is generated at the point where the first and second contacts separate or come into contact, the magnetic field formed by the first permanent magnet can pull the arc, achieving the effects of arc blowing and arc pulling. 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. Furthermore, because the first clearance part is designed according to the magnetic blowing path, the positions of the first and second contacts 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. In addition, it effectively avoids defects such as arc erosion of the internal cavity and relay explosion, ensuring product performance even under high load conditions and reducing the probability of product failure. Attached Figure Description

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

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

[0029] Figure 3 is a diagram showing the direction of the electric arc in one embodiment of the relay shown in Figure 1.

[0030] Figure 4 is a diagram showing the direction of the electric arc in another embodiment of the relay shown in Figure 1.

[0031] Figure 5 is a diagram showing the direction of the electric arc in another embodiment of the relay shown in Figure 1.

[0032] Figure 6 is a diagram showing the direction of the electric arc in another embodiment of the relay shown in Figure 1.

[0033] Figure 7 is a diagram showing the direction of the electric arc in one embodiment of the relay shown in Figure 2.

[0034] Figure 8 is a structural diagram of the movable spring in the first embodiment of this application.

[0035] Figure 9 is a structural diagram of the movable spring in the second embodiment of this application.

[0036] Figure 10 is a structural diagram of the movable spring in the third embodiment of this application.

[0037] Figure 11 is a structural diagram of the movable spring in the fourth embodiment of this application.

[0038] Figure 12 is another structural view of the moving spring shown in Figure 11.

[0039] Figure 13 is a cross-sectional view of the structure at EE in Figure 12.

[0040] Figure 14 is a cross-sectional view of the structure at FF in Figure 12.

[0041] Figure 15 is a structural diagram of the movable spring in the fifth embodiment of this application.

[0042] Figure 16 is a structural diagram of the movable spring in the sixth embodiment of this application.

[0043] Figure 17 is a structural diagram of the movable spring in the seventh embodiment of this application.

[0044] Figure 18 is a structural diagram of the movable spring in the eighth embodiment of this application.

[0045] Figure 19 is a structural diagram of the movable spring in the ninth embodiment of this application.

[0046] Figure 20 is a structural diagram of the movable spring in the tenth embodiment of this application.

[0047] Figure 21 is a structural diagram of the movable spring in the eleventh embodiment of this application.

[0048] Figure 22 is a structural diagram of the movable spring in the twelfth embodiment of this application.

[0049] Figure 23 is a structural diagram of the movable spring in the thirteenth embodiment of this application.

[0050] Figure 24 is a structural diagram of the movable spring in the fourteenth embodiment of this application.

[0051] Figure 25 is a structural diagram of the movable spring in the fifteenth embodiment of this application.

[0052] Figure 26 is a structural diagram of the movable spring in the sixteenth embodiment of this application.

[0053] Figure 27 is a structural diagram of the movable spring in the seventeenth embodiment of this application.

[0054] Figure 28 is a structural diagram of the movable spring in the eighteenth embodiment of this application.

[0055] Figure 29 is a structural diagram of the movable spring in the nineteenth embodiment of this application.

[0056] Figure 30 is a structural diagram of the movable spring in the twentieth embodiment of this application.

[0057] Figure 31 is a structural diagram of the movable spring in the twenty-first embodiment of this application.

[0058] Figure 32 is a structural diagram of the movable spring in the twenty-second embodiment of this application.

[0059] Figure 33 is a structural diagram of a relay according to another embodiment of this application.

[0060] Figure 34 is another structural view of the relay shown in Figure 33.

[0061] Figure 35 is another structural view of the relay shown in Figure 33.

[0062] Figure 36 is a bottom view of the stationary contact lead-out terminal in the relay shown in Figure 33.

[0063] Figure 37 is a structural diagram of a relay according to another embodiment of this application.

[0064] Figure 38 is a structural diagram of the relay shown in Figure 37 from another perspective.

[0065] Figure 39 is another structural view of the relay shown in Figure 37.

[0066] Figure 40 is a structural diagram of the arrangement of the first permanent magnet according to an embodiment of this application.

[0067] Figure 41 is a structural diagram of the arrangement of the first permanent magnet according to another embodiment of this application.

[0068] Figure 42 is a cross-sectional structural diagram of a relay according to an embodiment of this application.

[0069] 10. Contact assembly; 11. Stationary contact lead-out end; 111. First contact portion; 12. Moving spring; 121. Second contact portion; 1211. Second protrusion; 1212. Abutting 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

[0070] 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.

[0071] This embodiment provides a relay, as shown in Figure 1 or Figure 2 and Figure 42. Figure 1 and Figure 2 respectively show the structural schematic diagram of the relay in two different embodiments of this application, and Figure 42 shows the cross-sectional structural diagram of the relay. One embodiment of the relay includes a contact assembly 10 and a push assembly 20. The contact assembly 10 includes a stationary contact lead-out end 11 and a moving spring 12. The push assembly 20 is connected to the moving spring 12 and is used to push the moving spring 12 to actuate, so that the stationary contact lead-out end 11 and the moving spring 12 come into 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 drives the moving spring 12 to contact or separate from the stationary contact lead-out end 11. The push assembly 20 can also have various other structural forms, as long as it can actuate the moving spring 12, and is not limited here. Furthermore, the specific structure of the push assembly 20 is prior art, which is described in detail in the prior art and will not be repeated here.

[0072] 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.

[0073] Please refer to Figures 1 and 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 first contact portions 111 and second contact portions 121, and can be one, two, three, or more groups; 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] The arrangement direction of the two contact units is defined as the first direction, as shown by the double arrow x in Figure 1; the second direction is shown by the double arrow y in Figure 1; the direction of movement of the moving spring 12 relative to the stationary contact lead-out end 11 is defined as the third direction, as shown by the double arrow z in Figure 1; the first direction, the second direction and the third direction are mutually perpendicular, where the first direction, the second direction and the third direction only represent spatial directions and have no substantial meaning.

[0078] Specifically, in this embodiment, the movable spring 12 is sheet-shaped. The movable spring 12 includes, but is not limited to, straight sheets, curved sheets, straight strips, curved strips, or other regular and irregular shapes, which can be adjusted and set according to actual needs. When the movable spring 12 is a straight sheet, its length direction is as shown by the double arrow x in Figure 1, its width direction is as shown by the double arrow y in Figure 1, and its thickness direction is as shown by the double arrow z in Figure 1. Furthermore, when the movable spring 12 is a curved sheet, specifically a U-shaped curved sheet, as shown in Figure 32, the opposite ends of the movable spring 12 protrude towards the two first contact portions 111, and the portion between the opposite ends of the movable spring 12, that is, the middle portion of the movable spring 12, is recessed away from the stationary contact lead-out end 11.

[0079] 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.

[0080] For the reasons mentioned above, this application provides a relay that can effectively realize arc blowing, arc pulling, arc isolation and arc breaking, and can reduce the arc burning time, thus meeting the technical solution of high load capacity requirements.

[0081] Please refer again to Figure 1 or Figure 2. One embodiment of the relay provided in this application further includes a first permanent magnet 30. The first permanent magnet 30 is disposed around the movable reed 12.

[0082] 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.

[0083] The movable spring 12 has a second contact portion 121 at each of its opposite ends along its length. Two sets of first permanent magnets 30 are provided. Optionally, referring to Figure 1 or Figure 2, the two sets of first permanent magnets 30 can be arranged on the outer sides of the opposite ends of the movable spring 12 along its length, with each set corresponding to one of the two contact units. The contact units and their corresponding first permanent magnets 30 are arranged close to each other. Alternatively, the two sets of first permanent magnets 30 can be arranged in other ways, for example, referring to Figures 40 and 41, where the two sets of first permanent magnets 30 are arranged on any diagonal of the movable spring 12.

[0084] Furthermore, at least one of the first contact portion 111 and the second contact portion 121 is provided with a first clearance portion 13 to avoid each other. Thus, the first clearance portion 13 is located on the magnetic blow path, which can help to separate, lengthen and block the electric arc, thereby reducing the arcing time.

[0085] For example, please refer to Figures 37 to 39. When the first contact portion 111 is provided with a first clearance portion 13, the first clearance portion 13 is provided, for example, on the outer side of the first contact portion 111. Please refer to Figures 1 to 3. When the second contact portion 121 is provided with a first clearance portion 13, the first clearance portion 13 is provided, for example, on the outer side of the second contact portion 121. Please refer to Figures 33 to 36. 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 of each of the first contact portion 111 and the second contact portion 121 is located on their respective outer sides.

[0086] It should be noted that, in this embodiment, the outer portion of the first contact portion 111 refers to the side of the first contact portion 111 away from the central axis of the movable spring 12; conversely, the inner portion of the first contact portion 111 refers to the side of the first contact portion 111 close to the central axis of the movable spring 12. Similarly, the outer portion of the second contact portion 121 refers to the side of the second contact portion 121 away from the central axis of the movable spring 12; conversely, the inner portion of the second contact portion 121 refers to the side of the second contact portion 121 close to the central axis of the movable spring 12. The central axis of the movable spring is shown by the dashed line O in Figure 1.

[0087] It should be noted that, for each contact unit, when the first contact part 111 and the second contact part 121 come into contact with each other, it can be a point contact, and the number of contact points is not limited to one. For example, it can be two, three or four or more; it can also be a line contact or a surface contact; or it can be any combination of point contact, line contact and surface contact. There is no limitation here, and it can be set according to actual needs.

[0088] The contact surface of the first contact portion 111 facing the second contact portion 121 can be set as an arc-shaped surface, a plane or other irregular shape, which can be adjusted and set according to actual needs.

[0089] It should be noted that when there are two contact units, the shape and size of the first clearance parts 13 on the two first contact parts 111 can be the same or different from each other; the shape and size of the first clearance parts 13 on the two second contact parts 121 can be the same or different from each other, and there is no limitation here. The specific adjustment and setting can be made flexibly according to actual needs.

[0090] 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 formed 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. 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 arc ignition point position is more controllable, resulting in a significant arc isolation effect. In addition, it can effectively avoid 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.

[0091] 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, in this embodiment, the first clearance portion 13 is a clearance groove as an example, referring to any one of Figures 8 to 32. Optionally, the clearance groove may be a blind groove, as shown in Figures 8 to 10 and Figures 15 to 23. Of course, the clearance groove may also be a through groove, as shown in Figures 26 to 30, where the clearance groove passes through the movable spring 12 along the thickness direction of the movable spring 12.

[0092] Based on any of the foregoing embodiments, the clearance groove can be a closed groove on all four sides, as shown in Figure 31. Of course, the clearance groove can also be a non-closed groove on all four sides.

[0093] 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.

[0094] 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, as shown in Figures 8 to 10, 15 to 23, and 26 to 30. 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.

[0095] 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.

[0096] 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.

[0097] For example, when a first clearance portion 13 is provided on the outer side of the first contact portion 111, multiple first clearance portions 13 are provided on the outer side of the first contact portion 111. These multiple first clearance portions 13 are arranged sequentially along the width direction of the moving 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 moving spring 12, thereby improving the arc-isolating effect. Furthermore, the first clearance portion 13 segments the contact portion, inevitably creating multiple sets of contact points. These multiple sets of contact points have a current-shunting effect, reducing contact resistance and thus reducing temperature rise.

[0098] Based on the aforementioned embodiment, the first avoidance portion 13 specifically comprises two parts, which are disposed on opposite sides of the moving spring 12 in the width direction. Thus, a first protrusion protruding towards the first permanent magnet 30 is provided at the middle position of the outer side of the first contact portion 111. The two first avoidance portions 13 are respectively located on opposite sides of the first protrusion in the width direction. 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 arc generated by the first protrusion to quickly enter the air, thereby achieving rapid arc breaking and arc isolation effects.

[0099] For example, when the outer side of the second contact portion 121 is provided with a first clearance portion 13, there are multiple first clearance portions 13 on the outer side of the second contact portion 121. The multiple first clearance portions 13 are arranged sequentially along the width direction of the movable spring 12, specifically as shown in FIG29, or alternatively as shown in FIG24. With this arrangement, the second contact portion 121 has multiple arc-breaking and arc-isolating functions along its width direction, thereby improving the arc-isolating effect.

[0100] Please refer to Figures 24 and 25. Based on the aforementioned embodiment, the first avoidance portion 13 specifically comprises two parts, which are disposed on opposite sides of the second contact portion 121 along the width direction of the moving spring 12. Thus, a second protrusion 1211 protruding towards the first permanent magnet 30 is provided at the middle position of the outer portion of the second contact portion 121. The two first avoidance portions 13 are respectively located on both sides of the second protrusion 1211 along the width direction. Therefore, when the contact unit is closed, the second protrusion 1211 makes electrical contact with the first contact portion 111, while both first avoidance portions 13 can avoid the first contact portion 111. This allows the electric arc generated by the second protrusion 1211 to quickly enter the air, thereby achieving rapid arc breaking and arc isolation effects.

[0101] 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.

[0102] Similarly, the first clearance portion 13 on the outer side of the second contact portion 121 is not limited to multiple portions as described 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 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 shown in Figures 8 to 10 and Figures 15 to 21, the first clearance portion 13 can be located at the middle portion of the second contact portion 121 along the width direction. Of course, the first clearance portion 13 can also be located at any end of the second contact portion 121 along the width direction, as shown in Figures 22 and 23, both of which can achieve the functions of arc breaking, arc isolation, and arc extinguishing.

[0103] As shown in Figures 8 to 10 and Figures 15 to 21, when the first clearance portion 13 is located at the middle part of the second contact portion 121 along the width direction, that is, the outer part of the second contact portion 121 has the first clearance portion 13 at the middle part along the width direction, and the two side portions along the width direction are two abutting unit portions 1212 respectively, with the first clearance portion 13 located between the two abutting unit portions 1212. The surfaces of the two abutting unit portions 1212 can be flush, so that when the contact unit is conductive, both abutting unit portions 1212 can 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 abutting unit portions 1212 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 contact unit parts 1212 makes electrical contact with the first contact part 111, while the other contact unit part 1212 does not make electrical contact with the first contact part 111, thereby controlling the position of the arc initiation point.

[0104] Please refer to Figures 1, 3, and 4. To make the principle of the first avoidance part 13 clearer, this embodiment uses two contact units as an example, with the two arc initiation points being, for example, points B and C, to illustrate the specific arc breaking and arc isolation principles. 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. Referring to Figure 3, the arc at point B extends into the air at a downward left angle, as indicated by the dashed arrow at point B in Figure 3. The arc at point C extends into the air at an upward right angle, as indicated by the dashed arrow at point C in Figure 3. Thus, the arcs generated at points B and C respectively enter the air, thereby achieving the arc breaking and arc isolation effects. Referring to Figure 4, when the current direction is changed, that is, when the current direction is reversed, the arc direction at point B changes accordingly. For example, it extends obliquely to the upper left, as indicated by the dashed arrow at point B in Figure 4. The arc generated at point B needs to cross the first clearance part 13 and will be interrupted by the first clearance part 13. Similarly, the arc direction at point C changes accordingly, for example, it extends obliquely to the lower right, as indicated by the dashed arrow at point C in Figure 4. The arc generated at point C needs to cross the first clearance part 13 and will be interrupted by the first clearance part 13.

[0105] Please refer to Figures 1, 5, and 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. Specifically, as shown in Figure 5, the arc at point A extends into the air at an upward-left angle, as indicated by the dashed arrow at point A in Figure 5. The arc at point D extends into the air at a downward-right angle, as indicated by the dashed arrow at point D in Figure 5. In this way, the arcs generated at points A and D enter the air, thus achieving arc breaking and arc extinguishing. Referring to Figure 6, when the current direction is changed, i.e., when the current direction is reversed, the arc direction at point A changes accordingly, for example, extending downward-left, as indicated by the dashed arrow at point A in Figure 6. The arc generated at point A needs to cross the first clearance part 13 and will be broken and isolated by the first clearance part 13. In addition, the direction of the electric arc at point D changes accordingly, for example, it extends obliquely to the upper right, as indicated by the dashed arrow at point D in Figure 6. 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.

[0106] 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.

[0107] In cases where the electric arc is uncontrolled, or when a second permanent magnet 40 is present, or when the contacts are worn, the arc's blowing direction becomes irregular. It may blow not only towards the outer part of the second contact portion 121 but also towards the inner part. For example, referring to Figure 7, arcs are generated at all four points A, B, C, and D, and all of these arcs blow towards the inner part 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 arranged on the inner part of the second contact portion 121. In this way, the second clearance portion 14 can also play the role of arc isolation and rapid arc extinguishing, greatly reducing the arcing time.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] Research revealed that electric arcs are more easily directed towards the ends of the second relief portion 14, while fewer arcs are directed towards the middle portion. Referring to Figures 11 to 14, the second relief portion 14 is designed as a relief groove, with its depth increasing from its central position to either end. In other words, the depth of the second relief portion 14 is greatest at both ends. Thus, the two ends of the second relief portion 14 effectively interrupt and isolate the electric arc. Furthermore, the depth at the middle portion of the second relief portion 14 is, for example, minimal, and may even be flush with the surface of the moving spring 12. Therefore, the arc-interrupting and arc-isolating effect at the middle portion of the second relief portion 14 is less pronounced, but due to its larger current-carrying cross-sectional area, it does not affect current carrying capacity, i.e., it does not affect temperature rise.

[0112] 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.

[0113] 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.

[0114] Please refer to Figures 11, 12, 23, and 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 achieving arc isolation and rapid arc extinguishing, reducing the arcing time; on the other hand, due to the further provision of the second clearance portion 14, the contact area between the first contact portion 111 and the second contact portion 121 is further reduced, thus the arc initiation point is more controllable, allowing the arc to be controlled at a specific point, resulting in a significant arc isolation effect; furthermore, it effectively prevents the arc from flowing towards the inner part of the second contact portion 121, ensuring product performance even under high load conditions and reducing the probability of product failure.

[0115] For example, the opposite ends of the third clearance portion 15 on the first contact portion 111 extend to two opposite sides in the width direction of the first contact portion 111; and / or, the opposite ends of the third clearance portion 15 on the second contact portion 121 extend to two opposite sides in the width direction of the second contact portion 121. Thus, the third clearance portion 15 is relatively long, and the area for arc breaking and arc isolation is large, resulting in better arc breaking and arc isolation effects.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] Referring to Figure 1 or Figure 2, in one specific embodiment, there are two stationary contact leads 11 and one moving spring 12. Each end of the moving spring 12 along its length is provided with a second contact portion 121. Two sets of first permanent magnets 30 are provided, and the two sets of first permanent magnets 30 are respectively arranged on the outer sides of the opposite ends of the moving spring 12 along its length.

[0123] Referring to Figure 2, as an 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. Optionally, the polarized side of the second permanent magnet 40 faces the corresponding contact unit. 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.

[0124] Please refer to Figure 2 again. The second permanent magnet 40 is located between the two stationary contact leads 11. The magnetic properties of the two opposite surfaces of the second permanent magnet 40 and the first permanent magnet 30 are opposite.

[0125] 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.

[0126] 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.

[0127] For example, in a set of first permanent magnets 30 corresponding to the contact unit, the number of first permanent magnets 30 may include, but is not limited to, one, two, three or more, and the specific number can be flexibly adjusted and set according to actual needs. Specifically, when the load is low, one first permanent magnet 30 is sufficient; when the load is high, the number of first permanent magnets 30 needs to be increased, for example, by using two first permanent magnets 30 stacked together to increase the magnetic field strength.

[0128] For example, the magnetic force of the first permanent magnet 30 is stronger than that of the second permanent magnet 40.

[0129] To accommodate loads of different sizes, the number of first permanent magnets 30 can be adjusted, and different magnetic materials with varying magnetic strengths can be selected to design the first permanent magnets 30 according to the actual load requirements. Specifically, when the load is low, a magnetic material with weaker magnetic strength is used to make the first permanent magnets 30; when the load is high, a magnetic material with stronger magnetic strength is used to make the first permanent magnets 30, thereby increasing the magnetic flux density.

[0130] It should be noted that the arrangement position, quantity, shape, and layout of the first clearance portion 13 and the third clearance portion 15 on the moving spring 12 can be replicated on the first contact portion 111 of the stationary contact lead-out end 11, as shown in Figures 8 to 32. In other words, the arrangement position, quantity, shape, and layout 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 layout on the moving spring 12. This application will not elaborate further here, nor will it provide accompanying drawings to illustrate them one by one. Furthermore, the technical effects that the first clearance portion 13 and the third clearance portion 15 can bring to the first contact portion 111 of the stationary contact lead-out end 11 are similar to the technical effects that can be manifested on the second contact portion 121, and will not be elaborated further here.

[0131] Referring to Figure 42, in some embodiments, the relay further includes an inner cavity 50 and a base 60. The inner cavity 50 is connected to the base 60 and encloses it to form a chamber. The inner cavity 50 is made of, but is not limited to, a plastic material. An electrostatic discharge terminal is installed on the top wall of the inner cavity 50 and extends into the chamber. A movable spring 12 is movably disposed inside the chamber. A push assembly 20 is connected to the base 60, and the push rod 22 of the push assembly 20 extends into the chamber and connects to the movable spring 12. A first permanent magnet 30 is installed inside the cavity wall of the inner cavity 50, and a second permanent magnet 40 is connected to the cavity wall of the inner cavity 50. Thus, the cavity wall of the inner cavity 50 encloses the first permanent magnet 30 and the second permanent magnet 40, providing good protection for the first permanent magnet 30 and the second permanent magnet 40 and effectively preventing demagnetization defects caused by arc contact. The relay also includes a housing (not shown in the figure), which is fitted over the outer side of the inner cavity 50 and connected to the base 60. Potting compound can be applied between the outer shell and the inner cavity 50.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A relay, characterized in that, include: A contact assembly includes a stationary contact lead-out end and a movable spring. The stationary contact lead-out end 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. At least one of the first contact portion and the second contact portion is provided with a first clearance portion that avoids each other. A first permanent magnet is disposed around the movable spring.

2. 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.

3. The relay according to claim 2, characterized in that, The clearance groove is a blind groove or a through groove.

4. The relay according to claim 2, characterized in that, The clearance groove is a closed groove on all four sides; or the clearance groove is a non-closed groove on all four sides.

5. 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.

6. The relay according to claim 1, characterized in that, The first clearance portion is disposed on the outer side of the first contact portion; and / or, the first clearance portion is disposed on the outer side of the second contact portion.

7. The relay according to claim 6, characterized in that, The outer portion of the first contact portion has multiple first clearance portions, which are arranged sequentially along the width direction of the first contact portion; and / or, the outer portion of the second contact portion has multiple first clearance portions, which are arranged sequentially along the width direction of the second contact portion.

8. The relay according to claim 6, characterized in that, The first clearance portion on the outer side of the first contact portion is provided as one, and the first clearance portion is provided at the middle part or any end of the first contact portion along the width direction of the movable spring; and / or, the first clearance portion on the outer side of the second contact portion is provided as one, and the first clearance portion is provided at the middle part or any end of the second contact portion along the width direction of the movable spring.

9. 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.

10. The relay according to claim 9, 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.

11. The relay according to claim 10, 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.

12. The relay according to claim 9, 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.

13. 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.

14. The relay according to claim 13, characterized in that, The two opposite ends of the third clearance portion on the first contact portion extend to two opposite sides in the width direction of the first contact portion; and / or, the two opposite ends of the third clearance portion on the second contact portion extend to two opposite sides in the width direction of the second contact portion.

15. The relay according to claim 13, 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.

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. 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.

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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