Relay

Abstract

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

Description

Technical Field

[0001] The present application relates to the technical field of electric control devices, and in particular to a relay. Background Art

[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). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit. A high-voltage DC relay is a type of relay. A high-voltage DC relay includes a pair of static contacts and a moving contact. The two ends of the moving contact in the length direction are used to cooperate with a pair of static contacts respectively to connect and disconnect the load.

[0003] The principle of disconnecting the load of the high-voltage DC relay is to generate a directional magnetic blowing magnetic field by setting a permanent magnet. When the moving and static contacts separate and generate an arc, the arc is rapidly elongated by the magnetic blowing magnetic field until the arc is disconnected. The disconnection of the arc realizes the disconnection of the load and the arc extinguishing at the same time.

[0004] In the related art, the inner cavity of the relay is made of arc-resistant plastic parts. Plastic parts can prevent the arc from contacting the permanent magnet, thereby protecting the permanent magnet. However, when the inner cavity space of the relay is limited, especially when the load is higher, the arcing time is longer, and the arc is easy to contact the plastic parts to burn the inner cavity, causing serious carbon deposition in the inner cavity, which in turn leads to various problems such as contact non-conduction and poor voltage resistance of the push component card, resulting in low product performance; in addition, when the inner cavity is burned through, the arc contacts the permanent magnet, causing the permanent magnet to demagnetize, aggravating the arcing time, and causing problems such as relay explosion, and the product has a high risk of failure. Summary of the invention

[0005] Based on this, it is necessary to overcome the defects of the prior art and provide a relay that can effectively improve the arc blowing, arc pulling, arc isolating and arc breaking effects, meet high load capacity requirements, prevent ablation of the inner cavity, reduce the risk of product failure, and at the same time improve contact stability and reliability.

[0006] A relay, comprising:

[0007] A contact assembly, the contact assembly comprising a static contact lead-out terminal and a movable spring piece, the static contact lead-out terminal being provided with a first contact portion, the movable spring piece being provided with a second contact portion corresponding to the position of the first contact portion; the movable spring piece comprising at least two sheet units and an electrical connector sequentially arranged in parallel and spaced relation along its width direction, at least two of the sheet units being connected and fixed by the electrical connector, and two adjacent sheet units cooperating to form an arc isolation groove; and

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

[0009] In one embodiment, the arc isolation groove extends to the outer edge of the second contact portion; and / or the movable spring piece is a symmetrical structure.

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

[0011] In one embodiment, the electrical connecting member is an electrical connecting plate; there are two electrical connecting plates, one of which is connected to one end of each sheet unit along the length direction, and the other electrical connecting plate is connected to the other end of each sheet unit; or, there is one electrical connecting plate, and both opposite ends of each sheet unit along the length direction are connected to the electrical connecting plate.

[0012] In one of the embodiments, the electrical connecting piece is configured as a straight connecting piece or a curved connecting piece.

[0013] In one of the embodiments, the movable spring further includes a plurality of fasteners, and the plurality of fasteners are arranged corresponding to the plurality of sheet units, and each of the sheet units is fixedly connected to the electrical connector via the corresponding fastener.

[0014] In one of the embodiments, the electrical connector is disposed at a gap between two adjacent sheet units, and the side walls of the two sheet units facing each other are connected via the electrical connector, and the electrical connector and the two sheet units are an integrated structure.

[0015] In one embodiment, there are a plurality of electrical connectors, and the plurality of electrical connectors are sequentially spaced apart along the length direction of the sheet unit.

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

[0017] In one embodiment, the outer portion of the first contact portion and the outer portion of the second contact portion are in contact with each other, and the arc isolation groove is formed at a portion of the outer portion of the second contact portion where the magnetic field strength is relatively weak.

[0018] In one embodiment, a contact unit portion is provided at a portion of the outer portion of the second contact portion where the magnetic field strength is relatively large, and the contact unit portion is in contact with the outer portion of the first contact portion; two contact units are provided, and the arc isolation groove is provided between the two contact units.

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

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

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

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

[0023] In one embodiment, there are two static contact lead-out terminals, one movable spring sheet, and each of the two opposite ends of the movable spring sheet along the length direction is provided with a second contact portion; there are two groups of the first permanent magnets, the two groups of the first permanent magnets are arranged on the outer sides of the opposite ends of the movable spring sheet along the length direction, and the two groups of the first permanent magnets are 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, which is disposed between the two static contact lead-out terminals, and the second permanent magnet and the first permanent magnet have opposite magnetic properties on two surfaces relative to each other.

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

[0026] In the above relay, when the first contact part and the second contact part are separated from each other or contact each other to generate an arc, the magnetic field formed by the first permanent magnet can pull the arc, achieving the effect of blowing and pulling the arc. The arc moves along the contact surface, and when the arc moves to the arc isolation groove, the arc isolation groove can separate, lengthen and block the arc, reducing the arc burning time. In addition, since the arc isolation groove is set according to the magnetic blowing path, the position of the first contact part and the second contact part is relatively controllable, and the contact area is relatively small, so that the position of the arc starting point is more controlled, so that the arc isolation effect is obvious. In addition, it can effectively avoid defects such as arc burning the inner cavity and causing the relay to explode, and even under high load conditions, the product performance can still be guaranteed, and the probability of product failure can be reduced. At the same time, the first contact part is in contact with at least two sheet units synchronously, and there are at least two contact points between the first contact part and the second contact part, which plays a shunting role, can reduce the contact resistance, thereby improving the contact stability and reliability, and reducing the temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 3 This is a structural diagram from one perspective of the movable spring of the first embodiment of the present application.

[0030] Figure 4 for Figure 3 Another perspective structural diagram of the movable reed shown.

[0031] Figure 5 for Figure 3 The structure diagram shown is a moving spring piece matched with two static contact lead ends.

[0032] Figure 6 This is a structural diagram from one perspective of the movable spring of the second embodiment of the present application.

[0033] Figure 7 for Figure 6 Another perspective structural diagram of the movable reed shown.

[0034] Figure 8 This is a structural diagram from one perspective of the movable spring of the third embodiment of the present application.

[0035] Fig. 9 for Figure 8 Another perspective structural diagram of the movable reed shown.

[0036] Fig.10 This is a structural diagram from one perspective of the movable spring of the fourth embodiment of the present application.

[0037] Fig.11 for Fig.10 Another perspective structural diagram of the movable reed shown.

[0038] Fig.12 This is a structural diagram from one perspective of the movable spring of the fifth embodiment of the present application.

[0039] Fig.13 for Fig.12 Another perspective structural diagram of the movable reed shown.

[0040] Fig.14 This is a structural diagram from one perspective of the movable spring of the sixth embodiment of the present application.

[0041] Fig.15 for Fig.14 Another perspective structural diagram of the movable reed shown.

[0042] Fig.16 This is a direction diagram of the arc on the moving spring piece according to an embodiment of the present application.

[0043] Fig.17 This is a direction diagram of the electric arc on the moving spring piece according to another embodiment of the present application.

[0044] Fig.18 This is a direction diagram of the arc on the moving spring piece according to another embodiment of the present application.

[0045] Fig.19 This is a direction diagram of the electric arc on the moving spring piece according to another embodiment of the present application.

[0046] Fig. 20 This is a structural diagram of the arrangement of the first permanent magnet according to an embodiment of the present application.

[0047] Fig.21 This is a structural diagram of the arrangement of the first permanent magnet according to another embodiment of the present application.

[0048] Fig. 22 It is a cross-sectional structural diagram of a relay according to an embodiment of the present application.

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

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0051] This embodiment provides a relay such as Figure 1 , Figure 3 , Figure 4 and Fig. 22 As shown, Figure 1 Schematic diagram of the structure of a relay in an embodiment of the present application is shown. Figure 3 and Figure 4 Two different perspective structural diagrams of the movable spring 12 of an embodiment of the present application are shown. Fig. 22 The cross-sectional structure diagram of a relay of an embodiment of the present application is shown. The relay of an embodiment includes a contact assembly 10 and a push assembly 20. The contact assembly 10 includes a static contact lead-out terminal 11 and a moving reed 12. The push assembly 20 is connected to the moving reed 12, and the push assembly 20 is used to push the moving reed 12 to move, so that the static contact lead-out terminal 11 and the moving reed 12 are in contact with or separated from each other. 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 move, and the push rod 22 correspondingly drives the moving reed 12 to contact or separate from the static contact lead-out terminal 11. Among them, the push assembly 20 can also be various other structural forms, as long as it can achieve the pushing of the moving reed 12, which is not limited here. In addition, the specific structure of the push assembly 20 is a prior art, which is recorded in detail in the prior art and will not be repeated here.

[0052] When the moving spring 12 and the static contact lead-out terminal 11 are in contact, the moving spring 12, the static contact lead-out terminal 11 and the load are connected to form a path, thereby connecting the load; conversely, when the moving spring 12 and the static contact lead-out terminal 11 are separated, the moving spring 12 and the static contact lead-out terminal 11 are disconnected from each other.

[0053] See also Figure 1 , Figures 3 to 5For example, the static contact lead-out terminal 11 is provided with a first contact portion 111, and the movable spring piece 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 with each other to form a contact unit. In other words, the contact unit includes a first contact portion 111 and a second contact portion 121 that contact and cooperate with each other. Among them, the number of contact units depends on the number of the first contact portion 111 and the second contact portion 121, which can be one group, two groups, three groups or more groups, and the specific number is not limited. In order to facilitate the description and understanding of the present invention, the present embodiment specifically takes the number of two contact units as an example for expansion. Of course, the number of contact units can also be flexibly adjusted and set according to actual production needs.

[0054] It should be noted that the “position correspondence” in the position correspondence between the first contact portion 111 and the second contact portion 121 means that, along the movement direction of the movable spring piece 12, the positions of the first contact portion 111 and the second contact portion 121 are relative; in other words, along the movement direction of the movable spring piece 12, at least part of the projection area of ​​the first contact portion 111 on the movable spring piece 12 overlaps with the second contact portion 121.

[0055] It should be noted that the "first contact portion 111" can be a "part of the static contact lead-out terminal 11", that is, the "first contact portion 111" and the "other parts of the static contact lead-out terminal 11" are manufactured as one piece; it can also be an independent component that can be separated from the "other parts of the static contact lead-out terminal 11", that is, the "first contact portion 111" can be manufactured independently and then combined with the "other parts of the static contact lead-out terminal 11" into a whole.

[0056] Similarly, the "second contact portion 121" can be "a part of the movable reed 12", that is, the "second contact portion 121" is integrally formed with the "other parts of the movable reed 12"; it can also be an independent component that can be separated from the "other parts of the movable reed 12", that is, the "second contact portion 121" can be manufactured independently and then combined with the "other parts of the movable reed 12" into a whole.

[0057] Define the arrangement direction of the two contact units as the first direction. Figure 1 or Figure 5 The second direction is as shown by the double arrow x shown in Figure 5 As shown by the double arrow y in the figure; the moving direction of the moving spring 12 relative to the static contact lead-out terminal 11 is the third direction, and the third direction is as shown in FIG. Figure 1 or Figure 5 As shown by the double arrow z in ; the first direction, the second direction and the third direction are perpendicular to each other, wherein the first direction, the second direction and the third direction only represent spatial directions and have no substantial meaning.

[0058] Specifically, the movable spring piece 12 in this embodiment is in the shape of a sheet. The movable spring piece 12 includes, but is not limited to, a straight sheet, a curved sheet, a straight strip, a curved strip, or other regular shapes and irregular shapes, and can be adjusted and set according to actual needs. Under the premise that the movable spring piece 12 is a straight sheet, the length direction of the movable spring piece 12 is also as shown in FIG. Figure 5 As shown by the double arrow x in FIG. 1 , the width direction of the movable spring piece 12 is also as shown in FIG. Figure 5 As shown by the double arrow y in FIG. 1 , the thickness direction of the movable spring piece 12 is also as shown in FIG. Figure 5 In addition, when the movable spring piece 12 is configured as a curved piece, specifically, for example, a U-shaped curved piece, the opposite ends of the movable spring piece 12 protrude toward the two first contact portions 111, respectively, and the portion between the opposite ends of the movable spring piece 12, that is, the middle portion of the movable spring piece 12, is concave in a direction away from the static contact lead-out terminal 11.

[0059] Optionally, the movable spring piece 12 preferably adopts a symmetrical structure, which can be an axisymmetric structure or a central symmetric structure. Of course, the movable spring piece 12 can also be set to an asymmetric structure.

[0060] When the moving spring piece 12 and the static contact lead-out terminal 11 are separated, an 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 disconnected or extinguished in time, in the case of limited space in the inner cavity 50 of the relay, especially when the load is higher, the arcing time is longer, and the arc is easy to contact the plastic parts to burn the inner cavity 50, causing serious carbon deposition in the inner cavity 50, thereby causing various problems such as contact non-conduction, pushing component 20 stuck and poor voltage resistance, and the product performance is relatively low. In addition, when the inner cavity 50 is burned through, the arc contacts the permanent magnet, which will cause the permanent magnet to demagnetize, aggravate the arcing time, and cause problems such as relay explosion, and the product has a high risk of failure.

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

[0062] Please refer to Figure 1 or Figure 2 The relay provided by an embodiment of the present application further includes a first permanent magnet 30. The first permanent magnet 30 is disposed around the movable reed 12.

[0063] Optionally, a polar 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 achieve arc extinguishing by utilizing the magnetic field formed by the first permanent magnet 30 .

[0064] Wherein, the movable spring piece 12 has a second contact portion 121 at both opposite ends along the length direction. The first permanent magnet 30 is provided in two groups. Figure 1 or Figure 2 The two groups of first permanent magnets 30 can be arranged on the outside of the opposite ends of the movable spring piece 12 along the length direction, and the two groups of first permanent magnets 30 are arranged one by one with the two contact units. The contact unit and the corresponding first permanent magnet 30 are arranged close to each other. Specifically, the two groups of first permanent magnets 30 are symmetrically distributed about the center of the movable spring piece 12.

[0065] Of course, the two groups of first permanent magnets 30 are not limited to Figure 1 and Figure 2 The arrangement can also be arranged in other ways, such as referring to Fig. 20 and Fig.21 The two groups of first permanent magnets 30 are respectively arranged on any diagonal line of the movable spring piece 12. Specifically, the two groups of first permanent magnets 30 are symmetrically distributed about the center of the movable spring piece 12.

[0066] See also Figures 3 to 5 The movable spring piece 12 includes at least two sheet units 122 and an electrical connector 123 arranged in parallel and spaced order along the width direction thereof. At least two sheet units 122 are connected and fixed by the electrical connector 123, and two adjacent sheet units 122 cooperate to form an arc isolation groove 124.

[0067] The number of the sheet units 122 includes but is not limited to two, three or four. For ease of description and understanding, this embodiment will be described with two sheet units 122 as a specific example, but the actual specific number is not limited thereto.

[0068] In addition, the outer part of the first contact part 111 and the outer part of the second contact part 121 are mutually in conflict with each other, and the arc-isolating groove 124 is formed at the part of the outer part of the second contact part 121 where the magnetic field strength is relatively weak. At the same time, the part of the outer part of the second contact part 121 where the magnetic field strength is relatively large is provided with an abutting unit part 1211, and the abutting unit part 1211 is in conflict with the outer part of the first contact part 111. In this way, since the arc-isolating groove 124 is arranged at the part of the outer part of the second contact part 121 where the magnetic field strength is relatively weak, the arc-starting point is located at the part where the abutting unit part 1211 and the first contact part 111 contact each other, so that the arc-starting point position can be controlled at the part with relatively high magnetic field strength, thereby having a strong arc-starting effect. At the same time, the arc-isolating groove 124 is adjacent to the arc-starting point position, so that the arc can be quickly broken, so that the arc-isolating effect is obvious, and then the arc-burning inner cavity 50 and the relay explosion and other defects can be effectively avoided, even under high load conditions, the product performance can still be guaranteed, and the probability of product failure can be reduced.

[0069] For example, when the arc isolation groove 124 is disposed at the outer portion of the second contact portion 121, the arc isolation groove 124 can correspondingly avoid the first contact portion 111, and the portion of the outer portion of the second contact portion 121 with a higher magnetic field strength is not provided with the arc isolation groove 124, and thus contacts and cooperates with the outer portion of the first contact portion 111. The arc isolation groove 124 is located on the magnetic blowing path, which can facilitate the function of isolating, lengthening and blocking the arc, and reducing the arc burning time.

[0070] It should be noted that, in this embodiment, the outer portion of the first contact portion 111 refers to a side of the first contact portion 111 away from the central axis of the movable spring piece 12; conversely, the inner portion of the first contact portion 111 refers to a side of the first contact portion 111 close to the central axis of the movable spring piece 12. Similarly, the outer portion of the second contact portion 121 refers to a side of the second contact portion 121 away from the central axis of the movable spring piece 12; conversely, the inner portion of the second contact portion 121 refers to a side of the second contact portion 121 close to the central axis of the movable spring piece 12. The central axis of the movable spring piece is as shown in FIG. Figure 1 As shown by the dotted line O in FIG.

[0071] It should be noted that the curvature at both ends of the first permanent magnet 13 is large, the edge effect is obvious, and the magnetic lines of force are more easily concentrated, thereby enhancing the surface magnetism. However, the curvature of the middle area of ​​the first permanent magnet 13 is small, the magnetic lines of force are relatively evenly distributed, and the surface magnetism is weak.

[0072] Specifically in this embodiment, the magnetic field strength on the surface of the first permanent magnet 13 can be measured by a gauss meter, and it can be observed that the magnetic field at both ends is significantly stronger than that in the middle. For example, for a bar-shaped first permanent magnet 13, the surface magnetic field at both ends may reach thousands of gauss, while the middle may only be hundreds of gauss.

[0073] Therefore, 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 intensity distribution of the outer part of the first contact portion 111 along its width direction can be adjusted accordingly, and the magnetic field intensity distribution of the outer part of the second contact portion 121 along its width direction can be adjusted accordingly. When the magnetic field intensity of the outer part of the second contact portion 121 is distributed in a strong, weak and strong manner along the width direction, the abutting unit portion 1211 is set to two, and the arc isolation groove 124 is set between the two abutting unit portions 1211. That is, the two abutting unit portions 1211 are respectively arranged at two opposite sides of the outer part of the second contact portion 121 along the width direction. In this way, not only can a better arc breaking and arc isolation effect be achieved, but also when the contact unit is closed, the two abutting unit portions 1211 are both electrically contacted with the first contact portion 111 synchronously, thereby playing a parallel shunting role, which can reduce the contact resistance and improve stability.

[0074] In the above-mentioned relay, when the first contact portion 111 and the second contact portion 121 are separated from each other or contact each other so that an arc is generated at the contact unit, the magnetic field formed by the first permanent magnet 30 can pull the arc, and the arc moves along the contact surface of the contact unit. When the arc moves to the arc isolation groove 124, the non-conductive energy at the arc isolation groove 124 can disconnect the arc, thereby playing the role of arc isolation and arc extinguishing, and reducing the arc burning time. In addition, since the arc isolation groove 124 is set according to the magnetic blowing path, the position of the first contact portion 111 and the second contact portion 121 is relatively controllable, and the contact area is relatively small, so that the position of the arc starting point is more controlled, so that the arc isolation effect is obvious. Therefore, it can effectively avoid defects such as arc burning the inner cavity 50 and causing the relay to explode, and even under high load conditions, the product performance can still be guaranteed, and the probability of product failure can be reduced. At the same time, the first contact portion 111 is in contact with at least two sheet units 122 synchronously, and there are at least two contact points between the first contact portion 111 and the second contact portion 121, which plays a shunt role and can reduce contact resistance, thereby improving contact stability and reliability.

[0075] See also Figures 3 to 5 or Figure 6 and Figure 7 For example, the electrical connector 123 is connected to the side of the sheet unit 122 away from the first contact portion 111. In this way, the side of each sheet unit 122 facing the first contact portion 111 is in electrical contact with the first contact portion 111 when the contact unit is closed, and reliable and stable electrical contact can be achieved. The notch of the arc isolation groove 124 is arranged opposite to the first contact portion 111, and can normally play the arc-breaking and arc-isolating role. It can be seen that the electrical connector 123 will not affect the normal arc isolation function of the arc isolation groove 124, nor will it affect the normal electrical contact between the first contact portion 111 and the second contact portion 121.

[0076] Based on the foregoing embodiments, the electrical connector 123 includes but is not limited to an electrical connection sheet, an electrical connection plate, an electrical connection block, an electrical connection strip or an electrical connection wire, etc., as long as all the sheet units 122 can be fixedly connected together, and can be adjusted and set according to actual needs.

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

[0078] See also Figures 3 to 5 or Fig.12 and Fig.13As an example, there are two electrical connection sheets, one of which is connected to one end of each sheet unit 122 along the length direction, and the other is connected to the other end of each sheet unit 122. In this way, one end of each sheet unit 122 is connected and fixed by one electrical connection sheet, and the other end is connected and fixed by another electrical connection sheet. In this way, not only can all sheet units 122 be fixed and combined together, but also the same end of each sheet unit 122 can have equal potential, which is beneficial to improve the contact stability and reliability of the first contact portion 111 and the second contact portion 121; in addition, compared with covering the electrical connection sheet from one end of the sheet unit 122 to the other end of the sheet unit 122, the material consumption of the electrical connection sheet is small, so that the cost is reduced. In addition, the arc isolation groove 124 formed by the cooperation of the two sheet units 122 extends from one end of the sheet unit 122 to the other end, and the arc isolation groove 124 is relatively long, which has a better arc breaking and arc isolation effect.

[0079] On the basis of the above-mentioned embodiment, the electrical connection piece can be set as a straight connection piece, specifically as follows Figures 3 to 5 As shown, when the two sheet units 122 are connected by the straight connecting piece, the distance between the two sheet units 122 cannot be adjusted, so that the width of the arc isolation groove 124 remains constant.

[0080] The electrical connection piece can also be configured as a curved connection piece, such as a C-shaped elastic spring piece. Fig.12 and Fig.13 In this way, after the two sheet units 122 are connected by the bent connecting piece, the spacing between the two sheet units 122 can be flexibly adjusted and set according to actual needs, so that the slot width of the arc isolation groove 124 can be adaptively adjusted, and then the arc breaking and arc isolation effect of the arc isolation groove 124 can be adjusted, which can improve the arc breaking and arc isolation effect.

[0081] As an alternative, see Figure 6 and Figure 7 The electrical connection piece is not limited to being set to two as in the above embodiment, and can also be set to one to achieve a whole-piece connection. Specifically, the electrical connection piece extends along the length direction of the sheet unit 122, extending from one end of the sheet unit 122 to the other end of the sheet unit 122, and the opposite ends of each sheet unit 122 along the length direction are connected to the same electrical connection piece. In this way, each sheet unit 122 can be stably connected and fixed to the same electrical connection piece. In addition, the arc isolation groove 124 formed by the cooperation of the two sheet units 122 extends from one end of the sheet unit 122 to the other end. The length of the arc isolation groove 124 is relatively large, and has a better arc breaking and arc isolation effect.

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

[0083] It should be noted that there are many ways to fix the electrical connection sheet and the sheet unit 122, including but not limited to fixed connection using fasteners 125 such as rivets, pins, screws, bolts or clips, or welding connection, or one-piece processing such as die casting, forging, etc.

[0084] See also Figure 4 For example, the movable spring piece 12 further includes a plurality of fasteners 125. The plurality of fasteners 125 are arranged corresponding to the plurality of sheet units 122, and each sheet unit 122 is fixedly connected to the electrical connector 123 through the corresponding fastener 125. In this way, the sheet unit 122 and the electrical connector 123 are independently produced and processed, and then assembled together through the fastener 125, which reduces the processing difficulty compared to the one-piece molding processing method. In addition, compared to the welding method or the bonding method, the movable spring piece 12 can withstand high temperatures and is not easily deformed or damaged by the fastener 125 connection method.

[0085] On the basis of the above-mentioned embodiment, the sheet unit 122 and the fastener 125 may be in a one-to-one correspondence or a one-to-many relationship, as long as the sheet unit 122 and the electrical connector 123 are fastened together.

[0086] In another embodiment, the electrical connector 123 is not limited to being connected to the side of the sheet unit 122 away from the first contact portion 111 as in the above embodiment. Figures 8 to 11 or Fig.14 and Fig.15 The electrical connector 123 can also be arranged at the interval between two adjacent sheet units 122. The side walls of the two sheet units 122 facing each other are connected by the electrical connector 123. The electrical connector 123 and the two sheet units 122 are an integrated structure. In this way, the interval between the two adjacent sheet units 122, i.e., the arc isolation groove 124, can play the role of arc isolation and arc breaking. In addition, the two adjacent sheet units 122 are stably connected and combined together by the electrical connector 123.

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

[0088] See also Figure 8 and Fig. 9 On the basis of the above-mentioned embodiment, the electrical connector 123 is arranged at the middle part of the sheet unit 122 along the length direction. In this way, the middle parts of the two sheet units 122 along the length direction are connected as a whole through the electrical connector 123, and arc isolation grooves 124 are formed at the opposite ends of the two sheet units 122 along the length direction, which can play the role of arc isolation and arc breaking.

[0089] See also Fig.10 and Fig.11 For example, there are multiple electrical connectors 123, and the multiple electrical connectors 123 are sequentially arranged at intervals along the length direction of the sheet unit 122. In this way, the two sheet units 122 and the multiple electrical connectors 123 sequentially arranged between the two sheet units 122 cooperate to form multiple arc isolation grooves 124, and the multiple arc isolation grooves 124 can play the role of arc breaking and arc isolation. In addition, the two sheet units 122 are connected by multiple electrical connectors 123, which not only has a stable connection effect, but also has a large current-carrying cross-sectional area, thereby not affecting the temperature rise.

[0090] See also Fig.10 and Fig.11 As an example, there are three electrical connectors 123 between two sheet units 122, and there are four arc isolation grooves 124. Of course, when there is one electrical connector 123 between two sheet units 122, there are two arc isolation grooves 124.

[0091] See also Fig. 9 or Fig.11 For example, a positioning recess 126 is provided on the side of the movable spring piece 12 facing away from the first contact portion 111. The positioning recess 126 is recessed toward the first contact portion 111, and the positioning recess 126 is used to position and cooperate with the push rod 22 of the push assembly 20. In this way, the push rod 22 of the push assembly 20 can be installed in the positioning recess 126, so as to be stably assembled with the movable spring piece 12.

[0092] See also Fig.14 and Fig.15The electrical connector 123 can be provided in plurality, wherein two electrical connectors 123 can be provided on the side of the sheet unit 122 away from the first contact portion 111, and are respectively located at opposite ends of the sheet unit 122, and are connected and fixed, for example, by fasteners 125; another sheet unit 122 can be provided between two adjacent sheet units 122, and is, for example, integrally formed with the sheet unit 122.

[0093] See also Fig.16 In some embodiments, the distance between the two inner side walls of the arc isolation groove 124 is set to W, 1.5mm≤W≤15mm. Specifically, W includes but is not limited to 1.5mm, 3mm, 5mm, 6mm, 8mm, 9mm, 10mm or 15mm, etc. In this way, when W is small, for example, less than 1.5mm, the arc breaking and arc isolation effects of the arc isolation groove 124 are weakened; when W is large, for example, greater than 15mm, although the arc breaking and arc isolation effects of the arc isolation groove 124 are obvious, for the movable spring piece 12 of the same volume size, the current-carrying cross-sectional area is relatively small, thereby increasing the current-carrying temperature rise. Of course, as some optional schemes, W can also be set to any value less than 1.5mm or greater than 15mm.

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

[0095] Based on any of the above embodiments, the arc isolation groove 124 can be a groove body with four sides closed, such as Fig.10 Of course, the arc isolation groove 124 can also be a groove body that is not closed on all sides.

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

[0097] It should be noted that the "all-around closed" in the all-around closed trough body means that a point is selected on the side wall of the trough body as the starting point, and moving from the starting point along the circumference of the side wall of the trough body can eventually return to the starting point; conversely, the "all-around non-closed" in the all-around non-closed trough body means that a point is selected on the side wall of the trough body as the starting point, and moving from the starting point along the circumference of the side wall of the trough body can eventually not return to the starting point.

[0098] It should be noted that the outer edge of the second contact portion 121 refers to an edge of the second contact portion 121 that is opposite to the central axis of the movable spring piece 12 .

[0099] Based on any of the above embodiments, the contour shape of the arc isolation groove 124 includes but is not limited to regular shapes such as polygon, circle, semicircle, U-shape or Ω-shape and other irregular shapes. Among them, the polygon includes but is not limited to rectangle, trapezoid or triangle.

[0100] For example, when the arc isolation groove 124 is provided at the part of the outer part of the second contact portion 121 where the magnetic field strength is relatively weak, the arc isolation groove 124 at the part of the outer part of the second contact portion 121 where the magnetic field strength is relatively weak is not limited to one, but is provided as a plurality of arc isolation grooves 124. The plurality of arc isolation grooves 124 are arranged in sequence along the width direction of the second contact portion 121. In this way, the second contact portion 121 has multiple arc breaking and arc isolation functions along its width direction, thereby improving the arc isolation effect.

[0101] It should be noted that the portion with relatively weak magnetic field strength may be a portion where there is a weak magnetic field or a portion without a magnetic field on at least one of the first contact portion 111 and the second contact portion 121 .

[0102] Among them, when the arc isolation groove 124 is arranged in the middle part of the second contact part 121 along its width direction, that is, the outer part of the second contact part 121 has the arc isolation groove 124 in the middle part along the width direction, and the two side parts along the width direction are respectively two abutting unit parts 1211, and the arc isolation groove 124 is located between the two abutting unit parts 1211. The surfaces of the two abutting unit parts 1211 can be arranged flush, so that when the contact unit is turned on, the two abutting unit parts 1211 can both be electrically connected with the first contact part 111, which plays a role of reducing the contact resistance in parallel. Of course, the surfaces of the two abutting unit parts 1211 can also have a height difference along the thickness direction of the movable spring piece 12, and the height difference is, for example, 0.1mm to 0.3mm, and specifically, for example, 0.1mm, 0.2mm or 0.3mm, etc. Thus, when the contact unit is closed, one of the abutting unit portions 1211 is in electrical contact with the first contact portion 111 , and the other abutting unit portion 1211 is not in electrical contact with the first contact portion 111 , thereby achieving control of the position of the arc starting point.

[0103] In order to make the principle of arc isolation groove 124 clearer, please refer to Figures 16 to 19 In this embodiment, two contact units are used as an example, and two arc starting points are respectively at point B and point C. When the two contact units are disconnected synchronously, the arcs at the two arc starting points will be blown away in the diagonal direction under the guidance of the first permanent magnet 30. Fig.16, the arc at point B extends into the air at an angle to the lower left, as shown in Fig.16 The arc at point C extends into the air, for example, along the upper right angle. Figure 3 The dotted arrow at point C indicates the direction of the arc. In this way, the arcs generated at point B and point C enter the air, thereby achieving arc breaking and arc extinguishing. Fig.17 When the current direction is changed, that is, the current direction is reversed, the arc direction at point B changes accordingly, for example, extending obliquely to the upper left, as shown in Fig.17 The arc generated at point B needs to cross the arc isolation groove 124 and will be interrupted and isolated by the arc isolation groove 124. In addition, the arc direction at point C changes accordingly, for example, extending obliquely to the lower right, as shown in FIG. Fig.17 In the direction indicated by the dotted arrow at point C, the arc generated at point C needs to cross the arc isolation groove 124 and will be interrupted and isolated by the arc isolation groove 124.

[0104] See also Fig.18 and Fig.19 The two arc starting points can also be, for example, point A and point D. When the two contact units are disconnected synchronously, similarly, the arcs at the two arc starting points will be blown away in the diagonal direction under the guidance of the first permanent magnet 30. Fig.18 , the arc at point A extends into the air obliquely along the upper left, as shown in Fig.18 The arc at point D extends into the air, for example, in a downward and right-hand direction as indicated by the dotted arrow at point A. Fig.18 The dotted arrow at point D indicates the direction of the arc. In this way, the arcs generated at point A and point D enter the air, thereby achieving arc breaking and arc extinguishing. Fig.19 When the current direction is changed, that is, the current direction is reversed, the arc direction at point A changes accordingly, for example, extending obliquely to the lower left, as shown in Fig.19 The arc generated at point A needs to cross the arc isolation groove 124 and will be interrupted and isolated by the arc isolation groove 124. In addition, the arc direction at point D changes accordingly, for example, extending obliquely to the upper right, such as Fig.19 In the direction indicated by the dotted arrow at point D, the arc generated at point D needs to cross the arc isolation groove 124 and will be interrupted and isolated by the arc isolation groove 124.

[0105] It can be seen that the arc isolation groove 124 is close to the arc starting point, which can promptly and quickly break, 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 preventing the arc from contacting the first permanent magnet 30 and causing demagnetization defects.

[0106] See also Figure 2 , for example, the relay further includes a second permanent magnet 40. The second permanent magnet 40 is arranged corresponding to the contact unit, and the second permanent magnet 40 is located on the side of the contact unit away from the first permanent magnet 30, and the polarity 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. In this way, arc extinguishing is achieved by utilizing the magnetic field formed by the first permanent magnet 30 and the second permanent magnet 40 at the contact unit, and the magnetic field strength is relatively large, thereby having a better arc extinguishing effect.

[0107] Please refer to Figure 2 The second permanent magnet 40 is disposed between the two static contact lead-out terminals 11 , and the second permanent magnet 40 and the first permanent magnet 30 have opposite magnetic properties on two surfaces relative to each other.

[0108] The second permanent magnet 40 can be one, two or other number. In this embodiment, the second permanent magnet 40 is, for example, two, and the two second permanent magnets 40 are arranged in one-to-one correspondence with the two first permanent magnets 30 .

[0109] Optionally, when the polarity of the side of the first permanent magnet 30 facing the second permanent magnet 40 is level N, the polarity of the side of the second permanent magnet 40 facing the first permanent magnet 30 is correspondingly level S; conversely, when the polarity of the side of the first permanent magnet 30 facing the second permanent magnet 40 is level S, the polarity of the side of the second permanent magnet 40 facing the first permanent magnet 30 is correspondingly level N.

[0110] For example, the number of a group of first permanent magnets 30 includes but is not limited to one, two, three or more, and the specific number can be flexibly adjusted and set according to actual needs. 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 are used and stacked together to increase the magnetic induction intensity.

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

[0112] See also Fig. 22In 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 a chamber. The inner cavity 50 includes but is not limited to being made of plastic material. The electrostatic lead-out terminal is installed on the top wall of the inner cavity 50 and extends into the chamber. The moving reed 12 is movably arranged inside the chamber. The pushing assembly 20 is connected to the base 60, and the pushing rod 22 of the pushing assembly 20 extends into the chamber and is connected to the moving reed 12. The first permanent magnet 30 is installed inside the cavity wall of the inner cavity 50, and the second permanent magnet 40 is connected to the cavity wall of the inner cavity 50. In this way, the cavity wall of the inner cavity 50 wraps the first permanent magnet 30 and the second permanent magnet 40, which plays a good protective role for the first permanent magnet 30 and the second permanent magnet 40, and effectively prevents the demagnetization defect caused by arc contact. The relay also includes a shell (omitted and not shown in the figure), which is sleeved on the outside of the inner cavity 50 and connected to the base 60. A potting compound may be provided between the outer shell and the inner cavity 50 .

[0113] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0114] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0115] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0116] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0117] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A relay, characterized in that: include: A contact assembly, the contact assembly comprising a static contact lead-out terminal and a movable spring piece, the static contact lead-out terminal being provided with a first contact portion, the movable spring piece being provided with a second contact portion corresponding to the position of the first contact portion; the movable spring piece comprising at least two sheet units and an electrical connector sequentially arranged in parallel and spaced relation along its width direction, at least two of the sheet units being connected and fixed by the electrical connector, and two adjacent sheet units cooperating to form an arc isolation groove; and A first permanent magnet is disposed around the movable spring.

2. The relay according to claim 1, characterized in that: The arc isolation groove extends to the outer edge of the second contact portion; and / or the movable spring piece is a symmetrical structure.

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

4. The relay according to claim 3, characterized in that: The electrical connecting part is an electrical connecting plate; two electrical connecting plates are provided, one of which is connected to one end of each sheet unit along the length direction, and the other electrical connecting plate is connected to the other end of each sheet unit; or, one electrical connecting plate is provided, and the opposite ends of each sheet unit along the length direction are connected to the electrical connecting plate.

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

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

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

8. The relay according to claim 7, characterized in that: There are a plurality of electrical connectors, and the plurality of electrical connectors are sequentially spaced apart along the length direction of the sheet unit.

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

10. The relay according to claim 1, characterized in that: The outer portion of the first contact portion and the outer portion of the second contact portion are in contact with each other, and the arc isolation groove is formed at a portion of the outer portion of the second contact portion where the magnetic field strength is relatively weak.

11. The relay according to claim 10, characterized in that: An abutment unit is provided at a portion of the outer side of the second contact portion where the magnetic field strength is relatively large. The abutment unit contacts and cooperates with the outer side of the first contact portion. Two abutment units are provided, and the arc isolation groove is provided between the two abutment units.

12. The relay according to claim 1, characterized in that: The distance between the two inner side walls of the arc isolation groove is set to W, where W≥1.5 mm.

13. The relay according to claim 1, characterized in that: The arc isolation groove is a blind groove or a through groove; the arc isolation groove is a groove body with four sides closed, or the arc isolation groove is a groove body with four sides not closed; the contour shape of the arc isolation groove is rectangular, trapezoidal, triangular, circular, semicircular, U-shaped or Ω-shaped.

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

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

16. The relay according to claim 1, characterized in that There are two static contact lead-out terminals, one movable spring sheet, and each of the two opposite ends of the movable spring sheet along the length direction is provided with a second contact portion; there are two groups of the first permanent magnets, and the two groups of the first permanent magnets are arranged on the outer sides of the opposite ends of the movable spring sheet along the length direction, and the two groups of the first permanent magnets are arranged in a one-to-one correspondence with the two second contact portions.

17. The relay according to claim 16, characterized in that: The relay further includes a second permanent magnet, which is disposed between the two static contact lead-out terminals, and the second permanent magnet and the first permanent magnet have opposite magnetic properties on two surfaces facing each other.

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 the magnetic force of the second permanent magnets.

Images