Relay

Abstract

The utility model discloses a relay. The relay comprises a contact cavity, at least one group of contact assemblies and an arc guide structure, the contact cavity is provided with a contact chamber; the contact assembly comprises a movable contact piece and two static contact pieces, the static contact pieces are provided with static parts and conductive pieces, the static parts are arranged at the top of the contact cavity, the two conductive pieces are connected with the two static parts respectively, and the two conductive pieces extend in the direction close to each other; the movable contact piece is movably arranged in the contact cavity and is used for being in contact with or separated from the two conductive pieces; and the arc guide structure is arranged on the movable contact piece and is configured to guide arc flow generated in the contact and separation process of the movable contact piece and the static contact piece.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, 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. Essentially, a relay is 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.

[0003] Electric arcing is easily generated between the moving and stationary contacts of a relay during contact and separation. If the arc is not extinguished in time, it can easily burn through the moving and stationary contacts, affecting their electrical durability. To solve the problem of arc erosion of the moving and stationary contacts, related technologies use arc-extinguishing components. However, the arc-extinguishing components in these technologies still have a relatively long arc-extinguishing time, which is not conducive to improving the electrical durability of the moving and stationary contacts. Utility Model Content

[0004] This application provides a relay to further shorten the arc extinguishing time.

[0005] The relay in this application embodiment includes:

[0006] The contact cavity has a contact chamber.

[0007] At least one set of contact components, the contact components including a movable contact and two stationary contacts, each stationary contact having a stationary part and a conductive part, the stationary part being mounted on the top of the contact cavity, the two conductive parts being respectively connected to the two stationary parts, and the two conductive parts extending in a direction of mutual proximity; the movable contact is movably disposed within the contact cavity for contacting or separating from the two conductive parts; and

[0008] An arc-guiding structure is disposed on the moving contact and configured to guide the flow of electric arc generated by the moving contact and the stationary contact during the contact separation process.

[0009] According to some embodiments of this application, the arc-guiding structure is a second arc-guiding portion, which is connected to the moving contact member and is arranged at an angle relative to the moving contact member.

[0010] According to some embodiments of this application, the stationary contact has a receiving space on the side facing the moving contact, and the second guide arc portion extends obliquely from the moving contact in a direction close to the receiving space and away from the stationary contact.

[0011] According to some embodiments of this application, the second guide arc portion and the orthographic projection of the stationary contact member on a target plane have an overlapping area; the target plane is perpendicular to the contact separation direction of the moving contact member and the stationary contact member.

[0012] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The stationary component is installed on the top of the insulating cover.

[0013] The relay further includes a push rod component that is movable relative to the yoke plate, and a movable contact is mounted on the push rod component; the second guide arc portion extends from the movable contact in a direction away from the center line of the push rod component and close to the yoke plate.

[0014] According to some embodiments of this application, there are two second guide arc portions, and the two second guide arc portions are respectively connected to both ends of the moving contact member in the length direction.

[0015] According to some embodiments of this application, the second guide arc portion and the moving contact member are integrally connected; or, the second guide arc portion and the moving contact member are separately connected.

[0016] According to some embodiments of this application, the static contact has a first arc-guided portion arranged at an angle relative to the moving contact, the first arc-guided portion extending toward the moving contact and configured to guide the arc flow.

[0017] According to some embodiments of this application, the tilting direction of the first guide arc portion is arranged at an angle to the tilting direction of the second guide arc portion.

[0018] According to some embodiments of this application, the moving contact has a top surface and a side surface, the top surface facing the stationary contact;

[0019] The guide arc structure is chamfered, and the chamfer connects the top surface and the side surface.

[0020] According to some embodiments of this application, the chamfer is a C-shaped chamfer or an R-shaped chamfer.

[0021] According to some embodiments of this application, two of the conductive elements have contact portions at positions close to each other, and the moving contact element is used to contact or separate from the contact portions.

[0022] According to some embodiments of this application, the conductive element further has a first arc-guiding portion arranged at an angle relative to the moving contact, the first arc-guiding portion extending toward the moving contact and configured to guide the flow of electric arc generated by the moving contact and the contact portion during contact separation.

[0023] According to some embodiments of this application, the conductive element further includes a connecting portion, which is connected to the stationary component. One end of the first arc-guided portion is connected to the connecting portion, and the other end of the first arc-guided portion is connected to the contact portion.

[0024] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The stationary component is installed on the top of the insulating cover.

[0025] The relay further includes a push rod component that is movable relative to the yoke plate, and the moving contact is mounted on the push rod component; the first guide arc portion extends from the connecting portion toward the center line of the push rod component and the yoke plate.

[0026] According to some embodiments of this application, the portion of the stationary component extending out of the outer surface of the contact cavity is an exposed portion, the shortest distance between two exposed portions is L1, and the shortest distance between the contact portions of two stationary contacts is L3, where L3 ≤ L1.

[0027] According to some embodiments of this application, the stationary component has an insertion portion that extends into the contact cavity, and the shortest distance between two insertion portions is L5;

[0028] The shortest distance between the two contact points is L3, and L5 > L3.

[0029] According to some embodiments of this application, the relay further includes:

[0030] An arc-extinguishing assembly is disposed in the contact chamber for extinguishing the electric arc; the arc-guiding structure is configured to guide the electric arc flow to the arc-extinguishing assembly.

[0031] According to some embodiments of this application, the arc extinguishing assembly includes an arc extinguishing grid assembly located on the side of the stationary contact member facing the moving contact member.

[0032] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is mounted on the top of the insulating cover.

[0033] The arc-extinguishing grid assembly is located on the side of the stationary contact member facing the yoke plate.

[0034] According to some embodiments of this application, the arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two pairs of arc extinguishing grid assemblies respectively located at both ends of the moving contact member in the length direction;

[0035] The shortest distance between the two pairs of arc-extinguishing grid assemblies is L2, the portion of the stationary component extending out of the outer surface of the contact cavity is the exposed portion, the shortest distance between the two exposed portions is L1, and L2≤L1.

[0036] According to some embodiments of this application, the corresponding arc-extinguishing grid assembly and the stationary component have an overlapping portion on a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact and the stationary contact.

[0037] According to some embodiments of this application, the arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two arc extinguishing grid assemblies in the pair located at opposite ends of the moving contact in the longitudinal direction; the shortest distance between the two arc extinguishing grid assemblies in the pair is L2;

[0038] The stationary component has an insertion portion that extends into the contact chamber, and the farthest distance between the insertion portions of the two stationary components is L4, where L4 > L2.

[0039] According to some embodiments of this application, the static contact further includes a conductive element, which includes a first segment and a second segment connected vertically, the first segment being connected to the static component, and the second segment being used to contact or separate from the dynamic contact.

[0040] According to some embodiments of this application, all of the static contacts are located on the same side of the dynamic contacts.

[0041] According to some embodiments of this application, the arc-guiding structure is located on the side of the conductive element facing the moving contact.

[0042] According to some embodiments of this application, the arc guiding structure and the conductive element have overlapping portions in their orthogonal projections onto a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact and the stationary contact.

[0043] An embodiment of the above application has at least the following advantages or beneficial effects:

[0044] The relay in this embodiment of the application, by providing an arc-guiding structure on the moving contact, allows the electric arc generated between the moving and stationary contacts to flow along the arc-guiding structure, thereby elongating the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. Furthermore, with the help of the arc-guiding structure, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the arc-guiding structure, thereby reducing the loss of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and voltage breakdown capability between the moving and stationary contacts.

[0045] Furthermore, since the two conductive components extend in a direction that brings them closer to each other, and the arc-shaped structure is set on the side of the conductive component facing the moving contact, the arrangement inside the contact cavity is more compact, which is beneficial for the miniaturization design of the product.

[0046] Furthermore, since L3≤L1, while ensuring that the distance between the two contact parts remains unchanged, the distance between the two stationary parts can be increased as much as possible. In this way, while ensuring the electrical distance, other external parts, such as auxiliary monitoring contacts, exciters, etc., can be arranged in the space between the two stationary parts.

[0047] Furthermore, the arc-extinguishing component is arranged on the side of the stationary contact facing the moving contact to make full use of the space between the stationary contact and the yoke plate, without occupying too much space of the relay along the arrangement direction of the two stationary contacts. This ensures the arc-extinguishing effect of the arc-extinguishing component and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0048] Furthermore, in the contact separation direction of the moving contact and the stationary contact, the arc-extinguishing grid assembly overlaps with the stationary contact, and the two paired arc-extinguishing grid assemblies are located at the two ends of the length direction of the moving contact, so that the arc-extinguishing grid assembly is as close as possible to the contact position of the moving contact and the stationary contact. Thus, when an arc is generated between the moving contact and the stationary contact, the arc can enter the arc-extinguishing grid assembly with the shortest path, thus accelerating the arc extinguishing speed.

[0049] Furthermore, the shortest distance between the two exposed portions is L1, and the shortest distance between the two paired arc-extinguishing grid assemblies is L2. Since L2≤L1, the arc-extinguishing grid assembly is closer to the moving contact to accelerate the arc extinguishing speed.

[0050] Furthermore, the stationary contact is provided with a first arc-guiding portion, allowing the electric arc generated between the moving and stationary contacts to flow along the extension direction of the first arc-guiding portion. This elongates the arc, shortens the arc extinguishing time, prevents prolonged arc erosion of the moving and stationary contacts, and improves the electrical durability of the moving and stationary contacts. In addition, the first arc-guiding portion allows the arc to be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion, thereby reducing the wear on the contact surface of the moving and stationary contacts and minimizing the occurrence of arc spikes, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0051] Furthermore, the first arc-guiding section and the second arc-guiding section form a flared structure, which helps to confine the arc between the first arc-guiding section and the second arc-guiding section, thereby accelerating the arc flow to the arc-extinguishing component and shortening the arc-extinguishing time. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0053] Figure 1 This is a three-dimensional schematic diagram of the relay according to the first embodiment of this application.

[0054] Figure 2 It is along Figure 1 A sectional view after being cut along the AA section line.

[0055] Figure 3 yes Figure 2 A magnified view of part X3.

[0056] Figure 4 This is a three-dimensional schematic diagram of the arc extinguishing component.

[0057] Figure 5 This is a three-dimensional schematic diagram of the arc-extinguishing grid assembly.

[0058] Figure 6 This is a 3D schematic diagram of the mounting plate.

[0059] Figure 7 This is a three-dimensional schematic diagram of the grid.

[0060] Figure 8 This is a cross-sectional view of the relay according to the second embodiment of this application.

[0061] Figure 9 yes Figure 8 A magnified view of X2.

[0062] Figure 10This is a cross-sectional view of a relay according to the third embodiment of this application.

[0063] Figure 11 yes Figure 10 A magnified view of X1.

[0064] Figure 12 This is a cross-sectional view of the relay according to the fourth embodiment of this application.

[0065] Figure 13 yes Figure 12 A three-dimensional schematic diagram of the assembled conductive and static components.

[0066] Figure 14 This is a cross-sectional view of the relay according to the fifth embodiment of this application.

[0067] The reference numerals in the attached figures are explained as follows:

[0068] 100. Contact cavity

[0069] 101. Contact Chamber

[0070] 110. Insulating cover

[0071] 111. Ceramic cover

[0072] 112. Frame

[0073] 130. Yoke plate

[0074] 200. Contact components

[0075] 210. Static contact components

[0076] 211. Static parts

[0077] 212. Conductive components

[0078] 213. Connecting part

[0079] 214. First guide arc section

[0080] 215. Contact section

[0081] 220. Moving contact components

[0082] 221. Top surface

[0083] 222. Side view

[0084] 230. Second guide arc section

[0085] 240. Guide Arc Structure

[0086] 241. Chamfer

[0087] 300. Arc extinguishing assembly

[0088] 310. Arc-extinguishing grid assembly

[0089] 311. Installation components

[0090] 3111, Mounting Plate

[0091] 312. Grid

[0092] 313. Card hole

[0093] 314. Connecting part

[0094] 320. Isolation Seat

[0095] 600. Push rod components

[0096] D1, First Direction

[0097] D2, Second Direction

[0098] D3. Third direction Detailed Implementation

[0099] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0100] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0101] like Figure 1 and Figure 2As shown, the relay of this embodiment includes a contact cavity 100, at least one set of contact components 200, a push rod member 600, and an arc-extinguishing component 300. The contact cavity 100 has a contact chamber 101. Each set of contact components 200 includes a moving contact 220 and two stationary contacts 210. The stationary contacts 210 are fixedly mounted on the contact cavity 100, and the moving contact 220 is movably disposed within the contact chamber 101 for contacting or separating from the two stationary contacts 210. The push rod member 600 is movable relative to the contact cavity 100, and a portion of the push rod member 600 is located within the contact chamber 101. The moving contact 220 is installed in the portion of the push rod member 600 located within the contact chamber 101. The arc-extinguishing component 300 is disposed within the contact chamber 101 for extinguishing the arc generated during the contact and separation process of the moving contact 220 and the stationary contacts 210.

[0102] In one embodiment, all of the stationary contact 210 are located on the same side of the moving contact 220.

[0103] As an example, the contact cavity 100 includes an insulating cover 110 and a yoke plate 130. The insulating cover 110 covers one side of the yoke plate 130 in the thickness direction, and the insulating cover 110 and the yoke plate 130 form a contact cavity 101. The stationary contact member 210 is fixedly mounted on the insulating cover 110.

[0104] In one embodiment, the insulating cover 110 includes a ceramic cover 111 and a frame 112. The ceramic cover 111 is made of ceramic material and is connected to the yoke plate 130 via the frame 112. A static contact 210 is mounted on the top of the ceramic cover 111.

[0105] As an example, the frame piece 112 can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112 is connected to the opening edge of the ceramic cover 111, and the other end is connected to the yoke plate 130. The frame piece 112 is provided between the ceramic cover 111 and the yoke plate 130 to facilitate the connection between the ceramic cover 111 and the yoke plate 130.

[0106] The number of contact components 200 can be one or more groups. When the number of contact components 200 is more than one group, it can be two, three, four or other groups.

[0107] like Figure 1 and Figure 2As shown, the following explanation will take two sets of contact components 200 as an example. For ease of explanation, the arrangement direction of the two stationary contact members 210 of one set of contact components 200 is defined as the first direction D1, the movement direction of the push rod member 600 is defined as the second direction D2, and the third direction D3 is defined. The first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other. In this embodiment, the contact separation direction between the moving contact member 220 and the stationary contact member 210 is the second direction D2.

[0108] Two sets of contact assemblies 200 are arranged along the third direction D3. The positions of the two stationary contacts 210 of one set of contact assemblies 200 correspond to the positions of the two stationary contacts 210 of the other set of contact assemblies 200.

[0109] like Figure 2 and Figure 3 As shown, the stationary contact 210 has a stationary component 211 mounted on the top of the ceramic cover 111. The portion of the stationary component 211 extending beyond the outer surface of the contact cavity 100 is an exposed portion 211b. The shortest distance between the two exposed portions 211b is L1. The stationary contact 210 also has a contact portion 215 located within the contact cavity 101. A moving contact 220 of a set of contact assemblies 200 is used to contact or separate from the contact portions 215 of the two stationary contact components 210 of the contact assembly 200. The shortest distance between the contact portions 215 of the two stationary contact components 210 is L3, where L3 ≤ L1.

[0110] In the embodiments of this application, since L3≤L1, while ensuring that the distance between the two contact parts 215 remains unchanged, the distance between the two stationary parts 211 can be increased as much as possible. In this way, while ensuring the electrical distance, other external parts, such as auxiliary monitoring contacts, exciters, etc., can be arranged in the space between the two stationary parts 211.

[0111] The relay in this embodiment further includes an arc-guiding structure 240, which is disposed on the moving contact 220 and configured to guide the current flow generated during the contact separation process between the moving contact 220 and the stationary contact 210. Furthermore, the arc-guiding structure 240 can guide the arc flow to the arc-extinguishing assembly 300.

[0112] Please continue reading. Figure 2 Each stationary contact 210 also includes a conductive element 212. In the contact assembly 200, the conductive elements 212 of the two stationary contacts 210 are respectively connected to the stationary parts 211 of the two stationary contacts 210. The conductive elements 212 are used to contact or separate from the moving contact 220. The two conductive elements 212 have contact portions 215 at positions close to each other.

[0113] In one embodiment, the two conductive elements 212 extend in a direction that brings them closer to each other.

[0114] It should be noted that "the direction of mutual approach" refers to the overall tendency of the two conductive components 212 to approach each other, which may include, but is not limited to: the two conductive components 212 approaching each other along a straight line, the two conductive components 212 approaching each other along a curve, and a part of the two conductive components 212 approaching each other, etc.

[0115] The relay in this embodiment of the application provides an arc-guiding structure 240 on the moving contact 220, allowing the electric arc generated between the moving contact 220 and the stationary contact 210 to flow along the arc-guiding structure 240. This elongates the arc, shortens the arc extinguishing time, prevents the arc from burning the moving and stationary contacts for a long time, and improves the electrical durability of the moving and stationary contacts. Furthermore, the arc-guiding structure 240 allows the arc to be transferred from the contact surface of the moving and stationary contacts to the end of the arc-guiding structure 240, thereby reducing the loss of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and voltage breakdown capability between the moving and stationary contacts.

[0116] Among them, the phenomenon of sharpening refers to the phenomenon that, under long-term operation or high load, the contact surface develops sharp protrusions or deformations due to current, electric arc or mechanical wear.

[0117] In one embodiment, the arc-guided structure 240 is located on the side of the conductive element 212 facing the moving contact element 220.

[0118] In the embodiments of this application, since the two conductive elements 212 extend in a direction that approaches each other, and the arc-guided structure 240 is disposed on the side of the conductive element 212 facing the moving contact element 220, the arrangement in the contact cavity 100 is more compact, which is beneficial to the miniaturization design of the product.

[0119] In one embodiment, the arc-guided structure 240 and the conductive element 212 have overlapping portions in their orthographic projections onto a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact element 220 and the stationary contact element 210.

[0120] In one embodiment, the conductive element 212 is flat, and one end of the two conductive elements 212 is connected to two stationary parts 211 respectively, and extends from the corresponding stationary part 211 along the first direction D1 and toward each other.

[0121] The arc guiding structure 240 is the second arc guiding part 230, which can be a long strip-shaped plate structure. The second arc guiding part 230 is connected to the moving contact 220 and is arranged at an angle relative to the moving contact 220. The second arc guiding part 230 is configured to guide the arc flow to the arc extinguishing grid assembly 310.

[0122] In this embodiment, by providing a second arc-guiding portion 230, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the second arc-guiding portion 230, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. Furthermore, with the help of the second arc-guiding portion 230, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230, thereby reducing the wear on the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0123] like Figure 2 As shown, the stationary contact 210 has a receiving space 102 on the side facing the moving contact 220, and the second arc guide portion 230 automatically contacts the 220, extending obliquely towards the receiving space 102 and away from the stationary contact 210. In this embodiment, the receiving space 102 is used to arrange the arc extinguishing grid assembly 310.

[0124] In one embodiment, the second guide arc portion 230 is integrally connected with the moving contact member 220.

[0125] Of course, in other embodiments, the second guide arc portion 230 and the moving contact member 220 can also be connected separately, for example by riveting, welding, interference fit, etc.

[0126] In one embodiment, the second guide arc portion 230 and the stationary contact member 210 have an overlapping area on a target plane; the target plane is perpendicular to the contact separation direction of the moving contact member 220 and the stationary contact member 210.

[0127] like Figure 10 As shown, the automatic contact member 220 of the second arc guide portion 230 extends in a direction away from the center line of the push rod member 600 and close to the yoke plate 130. One end of the second arc guide portion 230 is connected to the moving contact member 220, and the other end of the second arc guide portion 230 is close to the end of the arc extinguishing grid assembly 310 near the yoke plate 130.

[0128] As an example, there may be two second arc guide portions 230, which are respectively connected to the two ends of the moving contact member 220 in the length direction, and both the second arc guide portions 230 and the moving contact member 220 are located between a pair of arc extinguishing grid assemblies 310.

[0129] Please continue reading. Figure 2 The arc-extinguishing component 300 is located on the side of the stationary contact 210 facing the moving contact 220. In this embodiment of the application, the arc-extinguishing component 300 is located on the side of the stationary contact 210 facing the yoke plate 130.

[0130] In the relay of this application embodiment, the arc extinguishing component 300 is arranged on the side of the stationary contact 210 facing the moving contact 220, so as to make full use of the space on the side of the stationary contact 210 facing the moving contact 220, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210. This ensures the arc extinguishing effect of the arc extinguishing component 300, and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0131] like Figure 4 As shown, the arc-extinguishing assembly 300 includes an isolation seat 320 and at least one pair of arc-extinguishing grid assemblies 310. The isolation seat 320 is disposed within the contact chamber 101, for example, the isolation seat 320 is fixedly connected to the yoke plate 130, and the arc-extinguishing grid assemblies 310 are mounted on the isolation seat 320. The two paired arc-extinguishing grid assemblies 310 are respectively located on the side of the two stationary contacts 210 of the contact assembly 200 facing the yoke plate 130, and are used to extinguish the arc generated by the moving contact 220 and the two stationary contacts 210. The arc-guiding structure 240 can guide the arc flow to the arc-extinguishing grid assembly 310.

[0132] In the embodiments of this application, the two paired arc-extinguishing grid assemblies 310 are respectively located on the side of the stationary part 211 of the two stationary contacts 210 of the contact assembly 200 facing the yoke plate 130.

[0133] In one embodiment, the number of arc-extinguishing grid assemblies 310 is the same as the number of stationary contacts 210. For example, the number of both arc-extinguishing grid assemblies 310 and stationary contacts 210 is four, but this is not a limitation.

[0134] Of course, in other embodiments, when the number of static contacts 210 is four, the number of arc extinguishing grid components 310 included in the arc extinguishing assembly 300 can also be two. The two arc extinguishing grid components 310 are arranged along the first direction D1, and each arc extinguishing grid component 310 has a larger size along the third direction D3 so as to cover multiple moving contacts 220.

[0135] like Figure 2 As shown, the two paired arc-extinguishing grid assemblies 310 are located at both ends of the length direction (first direction D1) of the moving contact 220. The corresponding arc-extinguishing grid assembly 310 and the stationary part 211 of the stationary contact 210 have an overlapping portion on a target plane, and the target plane is perpendicular to the contact separation direction (second direction D2) of the moving contact 220 and the stationary contact 210.

[0136] In the embodiments of this application, in the contact separation direction of the moving contact 220 and the stationary contact 210, the arc extinguishing grid assembly 310 and the stationary component 211 have an overlapping portion, and the two paired arc extinguishing grid assemblies 310 are respectively located at both ends of the length direction of the moving contact 220, so that the arc extinguishing grid assembly 310 is as close as possible to the contact position of the moving contact 220 and the stationary contact 210, and when an electric arc is generated between the moving contact 220 and the stationary contact 210, the electric arc can enter the arc extinguishing grid assembly 310 with the shortest path, thereby accelerating the arc extinguishing speed.

[0137] In one embodiment, the conductive component 212 and the stationary component 211 are connected separately, for example by welding, riveting, interference fit, or other methods.

[0138] Of course, in other embodiments, the conductive element 212 and the stationary element 211 can also be integrally connected, that is, the stationary contact element 210 is a single piece.

[0139] In one embodiment, the conductive element 212 can be connected to the bottom of the stationary element 211 or to the side of the stationary element 211. Of course, the conductive element 212 can also be connected to both the bottom and the side of the stationary element 211 at the same time. This application does not limit this.

[0140] Please return to the reference. Figure 2 The shortest distance between the two exposed parts 211b is L1, and the shortest distance between the two paired arc-extinguishing grid components 310 is L2, where L2≤L1.

[0141] In this embodiment of the application, since L2≤L1, the arc extinguishing grid assembly 310 is closer to the moving contact 220 to accelerate the arc extinguishing speed.

[0142] like Figure 2 As shown, in one embodiment, the portion of the stationary component 211 that extends into the contact cavity 100 is the insertion portion 211a, the farthest distance between the insertion portions 211a of the two stationary components 211 is L4, and the shortest distance between the two paired arc-extinguishing grid assemblies 310 is L2, where L4 > L2.

[0143] In this embodiment of the application, since L4 > L2, the arc extinguishing grid assembly 310 can be arranged below the insertion part 211a to improve the space utilization rate within the contact cavity 100, which is beneficial for product miniaturization design.

[0144] The conductive element 212 can be connected to the insertion part 211a.

[0145] like Figure 2 As shown, in one embodiment, the shortest distance between the two insertion portions 211a is L5, where L5 > L3.

[0146] In the embodiments of this application, since L5 > L3, the two conductive elements 212 extend in a direction that is generally close to each other, and sufficient space is reserved between the two insertion portions 211a. This space can accommodate other components, which improves the space utilization rate within the contact cavity 100 and is conducive to realizing the miniaturization design of the product.

[0147] In one implementation, L1 < L5.

[0148] like Figure 4 and Figure 5 As shown, the arc extinguishing grid assembly 310 includes a mounting member 311 and a plurality of grid plates 312. The plurality of grid plates 312 are mounted on the mounting member 311 and arranged along the contact separation direction (second direction D2) between the moving contact member 220 and the stationary contact member 210. There is a gap between two adjacent grid plates 312.

[0149] like Figure 5 and Figure 6 In one embodiment, the mounting member 311 includes two oppositely arranged mounting plates 3111, and a plurality of grid plates 312 are mounted between the two mounting plates 3111.

[0150] like Figure 6 and Figure 7 As shown, in one embodiment, the mounting plate 3111 and the grid plate 312 have a locking hole 313 on one of them and a locking part 314 on the other, the locking part 314 being engaged into the locking hole 313.

[0151] For example, the mounting plate 3111 has a snap-fit ​​hole 313 and the grid plate 312 has a snap-fit ​​portion 314; or, the mounting plate 3111 has a snap-fit ​​portion 314 and the grid plate 312 has a snap-fit ​​hole 313.

[0152] It should be noted that the connection between the grid plate 312 and the mounting component 311 is not limited to a snap-fit ​​method. For example, multiple slots can be provided on the mounting component 311, and the grid plate 312 can be inserted into the slots.

[0153] like Figure 8 and Figure 9 As shown, the similarities between the relay of the second embodiment and the relay of the first embodiment will not be repeated here, but the differences are as follows:

[0154] The moving contact 220 has a top surface 221 and a side surface 222, with the top surface 221 facing the stationary contact 210; the guide arc structure 240 is a chamfer 241, which connects the top surface 221 and the side surface 222.

[0155] The moving contact 220 may have chamfers 241 at both ends along its length, or it may have chamfers 241 at only one end along its length.

[0156] As an example, the chamfer 241 can be formed on the moving contact 220 by machining, such as by milling, lathe, or chamfering machine. Of course, it can also be machined by hand tools such as files or sandpaper.

[0157] In one embodiment, chamfer 241 is a C-shaped chamfer.

[0158] like Figure 10 and Figure 11 As shown, the similarities between the relay of the third embodiment and the relay of the first embodiment will not be repeated here, but the differences are as follows:

[0159] Chamfer 241 is an R chamfer.

[0160] like Figure 12 and Figure 13 As shown, the similarities between the relay of the fourth embodiment and the relay of the third embodiment will not be repeated here, but the differences are as follows:

[0161] The stationary contact 210 includes a first arc guide portion 214 arranged at an angle relative to the moving contact 220. The first arc guide portion 214 extends toward the moving contact 220 and is configured to guide the flow of the electric arc generated during the contact separation process between the moving contact 220 and the stationary contact 210 to flow toward the arc extinguishing assembly 300.

[0162] In this embodiment, by providing a first arc-guiding portion 214, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the first arc-guiding portion 214, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. Furthermore, with the help of the first arc-guiding portion 214, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214, thereby reducing the wear of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0163] As can be seen from the present application embodiment, the conductive member 212 has an inclined first arc-guiding portion 214, and the first arc-guiding portion 214 extends from the connecting portion 213 toward the direction close to the moving contact member 220. At the same time, the end of the conductive member 212 away from the stationary member 211 has a contact portion 215. The arrangement of the conductive member 211 can not only ensure the distance between the two stationary members 211 to provide a sufficiently long electrical distance and arrange other components, but also the first arc-guiding portion 214 of the conductive member 211 can guide the arc so that the arc flows to the arc-extinguishing assembly 300 in time. At the same time, the conductive member 212 has reserved space on the side facing the moving contact member 220, which can be used to arrange other components, improving the space utilization of the relay and facilitating the miniaturization design of the product.

[0164] The first guide arc portion 214 can extend along a straight line or along a curve, and this application does not limit it in this regard.

[0165] In one embodiment, the conductive element 212 has a first arc-guiding portion 214 and a contact portion 215.

[0166] like Figure 12 and Figure 13 As shown, the conductive member 212 also includes a connecting portion 213, which is connected to the stationary member 211. One end of the first arc-shaped portion 214 is connected to the connecting portion 213, and the other end of the first arc-shaped portion 214 is connected to the contact portion 215. The moving contact member 220 is used to contact or separate from the contact portion 215. The first arc-shaped portion 214 extends from the connecting portion 213 toward the center line of the push rod member 600 and the yoke plate 130.

[0167] like Figure 12 As shown, the tilt direction of the first guide arc portion 214 is arranged at an angle to the tilt direction of the second guide arc portion 230. This angle can be an acute angle or an obtuse angle.

[0168] In the embodiments of this application, the first arc guiding portion 214 and the second arc guiding portion 230 form a flared structure, which helps to confine the arc between the first arc guiding portion 214 and the second arc guiding portion 230, thereby accelerating the arc flow to the arc extinguishing component 300 and shortening the arc extinguishing time.

[0169] Of course, the first guide arc portion 214 of this application embodiment can also be combined with the chamfer 241 of the first and second embodiments described above.

[0170] like Figure 14 As shown, the similarities between the relay of the fifth embodiment and the relay of the fourth embodiment will not be repeated here, but the differences are as follows:

[0171] The conductive element 212 includes a first segment 2121 and a second segment 2122 that are vertically connected. The first segment 2121 is connected to the stationary component 211, and the end of the second segment 2122 away from the first segment 2121 has a contact portion 215.

[0172] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0173] The relay in this embodiment of the application provides an arc-guiding structure 240 on the moving contact 220, allowing the electric arc generated between the moving contact 220 and the stationary contact 210 to flow along the arc-guiding structure 240. This elongates the arc, shortens the arc extinguishing time, prevents the arc from burning the moving and stationary contacts for a long time, and improves the electrical durability of the moving and stationary contacts. Furthermore, the arc-guiding structure 240 allows the arc to be transferred from the contact surface of the moving and stationary contacts to the end of the arc-guiding structure 240, thereby reducing the loss of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and voltage breakdown capability between the moving and stationary contacts.

[0174] Furthermore, since the two conductive elements 212 extend in a direction that approaches each other, and the arc-guided structure 240 is disposed on the side of the conductive element 212 facing the moving contact element 220, the arrangement within the contact cavity 100 is more compact, which is beneficial for product miniaturization design.

[0175] Furthermore, since L3≤L1, while ensuring that the distance between the two contact parts 215 remains unchanged, the distance between the two exposed parts 211b can be increased as much as possible. In this way, while ensuring the electrical distance, other external components, such as auxiliary monitoring contacts, exciters, etc., can be arranged in the space between the two stationary parts 211.

[0176] Furthermore, the arc-extinguishing component 300 is arranged on the side of the stationary contact 210 facing the yoke plate 130 to make full use of the space between the stationary contact 210 and the yoke plate 130, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210. This ensures the arc-extinguishing effect of the arc-extinguishing component 300 and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0177] Furthermore, in the contact separation direction of the moving contact 220 and the stationary contact 210, the arc-extinguishing grid assembly 310 overlaps with the stationary contact 210, and the two paired arc-extinguishing grid assemblies 310 are located at both ends of the length direction of the moving contact 220, so that the arc-extinguishing grid assembly 310 is as close as possible to the contact position of the moving contact 220 and the stationary contact 210. Thus, when an electric arc is generated between the moving contact 220 and the stationary contact 210, the electric arc can enter the arc-extinguishing grid assembly 310 with the shortest path, thereby accelerating the arc extinguishing speed.

[0178] Furthermore, the shortest distance between the two exposed portions 211b is L1, and the shortest distance between the two paired arc-extinguishing grid assemblies 310 is L2. Since L2≤L1, the arc-extinguishing grid assembly 310 is closer to the moving contact 220 to accelerate the arc extinguishing speed.

[0179] Furthermore, the stationary contact 210 is provided with a first arc-guiding portion 214, allowing the electric arc generated between the moving contact 220 and the stationary contact 210 to flow along the extension direction of the first arc-guiding portion 214. This elongates the arc, shortens the arc extinguishing time, prevents the arc from burning the moving and stationary contacts for a long time, and improves the electrical durability of the moving and stationary contacts. In addition, with the help of the first arc-guiding portion 214, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214, thereby reducing the wear of the contact surface of the moving and stationary contacts and reducing the occurrence of arc spikes, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0180] Furthermore, the first arc-guiding portion 214 and the second arc-guiding portion 230 form a flared structure, which helps to confine the arc between the first arc-guiding portion 214 and the second arc-guiding portion 230, thereby accelerating the arc flow to the arc-extinguishing assembly 300 and shortening the arc-extinguishing time.

[0181] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0182] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0183] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0184] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0185] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: The contact cavity has a contact chamber. At least one set of contact components, the contact components including a moving contact and two stationary contacts, the stationary contacts having a stationary part and a conductive part, the stationary part being mounted on the top of the contact cavity, the two conductive parts being respectively connected to the two stationary parts, and the two conductive parts extending in a direction of mutual proximity; The movable contact is movably disposed in the contact cavity for contacting or separating from the two conductive elements; as well as An arc-guiding structure is disposed on the moving contact and configured to guide the flow of electric arc generated by the moving contact and the stationary contact during the contact separation process.

2. The relay according to claim 1, characterized in that, The arc-guiding structure is a second arc-guiding part, which is connected to the moving contact and is arranged at an angle relative to the moving contact.

3. The relay according to claim 2, characterized in that, The stationary contact has a receiving space on the side facing the moving contact, and the second guide arc extends obliquely from the moving contact toward the receiving space and away from the stationary contact.

4. The relay according to claim 2, characterized in that, The second guide arc portion overlaps with the orthographic projection of the stationary contact member on a target plane; the target plane is perpendicular to the contact separation direction of the moving contact member and the stationary contact member.

5. The relay according to claim 2, characterized in that, The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The stationary component is installed on the top of the insulating cover. The relay further includes a push rod component that is movable relative to the yoke plate, and a movable contact is mounted on the push rod component; the second guide arc portion extends from the movable contact in a direction away from the center line of the push rod component and close to the yoke plate.

6. The relay according to any one of claims 2-5, characterized in that, There are two second guide arc portions, and the two second guide arc portions are respectively connected to the two ends of the moving contact member in the length direction.

7. The relay according to any one of claims 2-5, characterized in that, The second guide arc portion is integrally connected to the moving contact member; or, the second guide arc portion and the moving contact member are separately connected.

8. The relay according to any one of claims 2-5, characterized in that, The stationary contact has a first arc-guided portion that is arranged at an angle relative to the moving contact. The first arc-guided portion extends toward the moving contact and is configured to guide the flow of the electric arc.

9. The relay according to claim 8, characterized in that, The tilt direction of the first guide arc portion is angularly arranged with the tilt direction of the second guide arc portion.

10. The relay according to claim 1, characterized in that, The moving contact has a top surface and a side surface, with the top surface facing the stationary contact. The guide arc structure is chamfered, and the chamfer connects the top surface and the side surface.

11. The relay according to claim 10, characterized in that, The chamfer is either a C-shaped chamfer or an R-shaped chamfer.

12. The relay according to any one of claims 1-5, characterized in that, The two conductive elements have contact portions located close to each other, and the movable contact element is used to contact or separate from the contact portions.

13. The relay according to claim 12, characterized in that, The conductive element also has a first arc-guided portion arranged at an angle relative to the moving contact, the first arc-guided portion extending toward the moving contact and configured to guide the flow of electric arc generated by the moving contact and the contact portion during contact separation.

14. The relay according to claim 13, characterized in that, The conductive component further includes a connecting portion, which is connected to the stationary component. One end of the first arc-guided portion is connected to the connecting portion, and the other end of the first arc-guided portion is connected to the contact portion.

15. The relay according to claim 14, characterized in that, The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The stationary component is installed on the top of the insulating cover. The relay further includes a push rod component that is movable relative to the yoke plate, and the moving contact is mounted on the push rod component; the first guide arc portion extends from the connecting portion toward the center line of the push rod component and the yoke plate.

16. The relay according to claim 12, characterized in that, The portion of the stationary component that extends beyond the outer surface of the contact cavity is the exposed portion. The shortest distance between two exposed portions is L1, and the shortest distance between the contact points of two stationary contacts is L3, where L3 ≤ L1.

17. The relay according to claim 12, characterized in that, The stationary component has an insertion portion that extends into the contact cavity, and the shortest distance between the two insertion portions is L5; The shortest distance between the two contact points is L3, and L5 > L3.

18. The relay according to any one of claims 1-5, characterized in that, The relay also includes: An arc-extinguishing assembly is disposed in the contact chamber for extinguishing the electric arc; the arc-guiding structure is configured to guide the electric arc flow to the arc-extinguishing assembly.

19. The relay according to claim 18, characterized in that, The arc extinguishing assembly includes an arc extinguishing grid assembly, which is located on the side of the stationary contact member facing the moving contact member.

20. The relay according to claim 19, characterized in that, The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is installed on the top of the insulating cover. The arc-extinguishing grid assembly is located on the side of the stationary contact member facing the yoke plate.

21. The relay according to claim 18, characterized in that, The arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two arc extinguishing grid assemblies in the pair located at both ends of the moving contact in the length direction; The shortest distance between the two pairs of arc-extinguishing grid assemblies is L2, the portion of the stationary component extending out of the outer surface of the contact cavity is the exposed portion, the shortest distance between the two exposed portions is L1, and L2≤L1.

22. The relay according to claim 19, characterized in that, The corresponding arc-extinguishing grid assembly and the stationary component have an overlapping portion on a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact and the stationary contact.

23. The relay according to claim 18, characterized in that, The arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two arc extinguishing grid assemblies in the pair located at opposite ends of the moving contact in the longitudinal direction; the shortest distance between the two arc extinguishing grid assemblies in the pair is L2; The stationary component has an insertion portion that extends into the contact chamber, and the farthest distance between the insertion portions of the two stationary components is L4, where L4 > L2.

24. The relay according to any one of claims 1-5, characterized in that, The static contact further includes a conductive element, which includes a first segment and a second segment connected vertically. The first segment is connected to the static component, and the second segment is used to contact or separate from the dynamic contact.

25. The relay according to any one of claims 1-5, characterized in that, All of the static contacts are located on the same side of the moving contact.

26. The relay according to any one of claims 1-5, characterized in that, The arc-guiding structure is located on the side of the conductive element facing the moving contact.

27. The relay according to claim 26, characterized in that, The arc-guided structure and the conductive element have overlapping projections on a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact and the stationary contact.

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