Relay

Abstract

The utility model discloses a relay. The relay comprises a contact cavity and at least one contact assembly. 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 fixedly arranged relative to the contact cavity, and the movable contact piece is movably arranged in the contact cavity and used for making contact with or being separated from the two static contact pieces; the static contact piece is provided with a first arc guide part which is obliquely arranged relative to the movable contact piece, and the first arc guide part extends in the direction close to the movable contact piece and is configured to guide electric arc flow generated in the contact and separation process of the movable contact piece and the static contact piece.

Description

TECHNICAL FIELD

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

[0002] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" that uses a small current to control a large current. Therefore, it plays a role of automatic adjustment, safety protection, and conversion of circuits in the circuit.

[0003] During the contact and separation process of the moving contact and the stationary contact of the relay, electric arc is easily generated. If the electric arc is not extinguished in time, the moving contact and the stationary contact will be ablated by the electric arc, which affects the electrical durability of the moving contact and the stationary contact. In order to solve the problem of ablation of the moving contact and the stationary contact by the electric arc, the related technology realizes arc extinguishing by setting an arc extinguishing component. However, the arc extinguishing component in the related technology still takes a long time to extinguish the electric arc, which is not conducive to improving the electrical durability of the moving contact and the stationary contact. CONTENT OF THE INVENTION

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

[0005] The relay of the present application comprises:

[0006] a contact cavity having a contact chamber; and

[0007] at least one contact assembly, the contact assembly comprising a moving contact and two stationary contacts, the stationary contacts being fixedly arranged relative to the contact cavity, and the moving contact being movably arranged in the contact chamber and being used to contact or separate from the two stationary contacts;

[0008] wherein the stationary contact has a first arc guiding portion which is arranged obliquely relative to the moving contact, the first arc guiding portion extends towards the direction close to the moving contact, and is configured to guide the electric arc generated during the contact and separation process of the moving contact and the stationary contact.

[0009] According to some embodiments of the present application, the contact assembly further comprises a second arc guiding portion, the second arc guiding portion is connected to the moving contact and is arranged obliquely relative to the moving contact, and the second arc guiding portion is configured to guide the electric arc.

[0010] According to some embodiments of the present application, the side of the stationary contact towards the moving contact has a containing space, and the second arc guiding portion extends obliquely from the moving contact towards the direction close to the containing 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 static contact is mounted 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 tilting direction of the first guide arc portion is arranged at an angle to the tilting direction of the second guide arc portion.

[0017] According to some embodiments of this application, all of the static contacts are located on the same side of the dynamic contacts.

[0018] According to some embodiments of this application, the static contact includes a static component and a conductive component. The static component is mounted on the top of the contact cavity, and the conductive component is used to contact or separate from the moving contact. In the contact assembly, the conductive components of the two static contacts are respectively connected to the static components of the two static contacts. The conductive component has the first arc-guided portion.

[0019] According to some embodiments of this application, the conductive member further includes a connecting portion and a contact portion. The connecting portion is connected to the stationary component. One end of the first arc-shaped portion is connected to the connecting portion, and the other end of the first arc-shaped portion is connected to the contact portion. The moving contact member is used to contact or separate from the contact portion.

[0020] 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.

[0021] 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.

[0022] 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 the two conductive components is L3, where L3 ≤ L1.

[0023] 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;

[0024] The conductive element has a contact portion for contacting or separating from the moving contact, and the shortest distance between two contact portions is L3, where L5 > L3.

[0025] According to some embodiments of this application, the relay further includes:

[0026] An arc-extinguishing assembly, located within the contact chamber, is used to extinguish the electric arc generated by the moving contact and the stationary contact during the contact separation process.

[0027] The first arc-guiding part is configured to guide the arc flow to the arc-extinguishing component.

[0028] 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 located at opposite ends of the moving contact in the length direction.

[0029] According to some embodiments of this application, the static contact includes a static component and a conductive component. The static component is mounted on the contact cavity, and the conductive component is used to contact or separate from the moving contact. In the contact assembly, the conductive components of the two static contacts are respectively connected to the static components of the two static contacts. The conductive component has a first arc-guided portion.

[0030] 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 two paired arc-extinguishing grid assemblies is L2, where L2 ≤ L1.

[0031] According to some embodiments of this application, the static contact includes a static component mounted on the contact cavity, the static component having an insertion portion extending into the contact cavity, the farthest distance between the insertion portions of two static components being L4, and the shortest distance between a pair of arc-extinguishing grid assemblies being L2, where L4 > L2.

[0032] According to some embodiments of this application, the relay further includes an exciter mounted on the contact cavity and configured to release an impactor into the contact cavity in response to an excitation signal, the impactor being capable of switching the moving contact from a state of being connected to the stationary contact to a state of being disconnected from the stationary contact.

[0033] An embodiment of the above application has at least the following advantages or beneficial effects:

[0034] The relay in this embodiment of the application, by providing a first arc-guiding portion, allows the electric arc generated between the moving contact and the stationary contact 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. Furthermore, 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, minimizing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0035] Furthermore, since L3≤L1, the two conductive parts extend in a direction that is close to each other. This not only allows the first arc-guiding part to be used for arc guiding, but also allows the distance between the two exposed parts to be increased as much as possible while ensuring that the distance between the contact parts of the two conductive parts remains unchanged. In this way, other components, such as auxiliary monitoring contacts and exciters, can be arranged in the space between the two stationary parts while ensuring the electrical distance.

[0036] 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.

[0037] Furthermore, the shortest distance between the two exposed parts 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.

[0038] Furthermore, by providing a second arc-guiding section, the electric arc generated between the moving and stationary contacts can flow along the extension direction of the second arc-guiding section, 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. In addition, with the help of the second arc-guiding section, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding section, 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.

[0039] 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.

[0040] Furthermore, the relay is equipped with an exciter. When an excitation signal is received, the exciter is activated, releasing an impactor into the contact chamber. This impactor causes the moving contact to switch from a state of conduction with the stationary contact to a state of disconnection. In this way, the exciter acts as a "fuse," promptly disconnecting the relay upon the arrival of the excitation signal. This improves the anti-sticking properties of the moving and stationary contacts, enabling rapid arc extinguishing. Attached Figure Description

[0041] 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.

[0042] Figure 1 This is a three-dimensional schematic diagram of a relay according to an embodiment of this application.

[0043] Figure 2 It is along Figure 1 A sectional view after being cut along the AA section line.

[0044] Figure 3 It is a three-dimensional schematic diagram of the assembled conductive and static components.

[0045] Figure 4 This is a three-dimensional schematic diagram of the arc extinguishing component.

[0046] Figure 5 This is a three-dimensional schematic diagram of the arc-extinguishing grid assembly.

[0047] Figure 6 This is a 3D schematic diagram of the mounting plate.

[0048] Figure 7 This is a three-dimensional schematic diagram of the grid.

[0049] Figure 8 This is a cross-sectional view of a relay according to another embodiment of this application. The reference numerals are explained as follows:

[0050] 100. Contact cavity

[0051] 101. Contact Chamber

[0052] 102. Capacity

[0053] 110. Insulating cover

[0054] 111. Ceramic cover

[0055] 112. Frame

[0056] 130. Yoke plate

[0057] 200. Contact components

[0058] 210. Static contact components

[0059] 211. Static parts

[0060] 212. Conductive components

[0061] 213. Connecting part

[0062] 214. First guide arc section

[0063] 215. Contact section

[0064] 220. Moving contact components

[0065] 230. Second guide arc section

[0066] 300. Arc extinguishing assembly

[0067] 310. Arc-extinguishing grid assembly

[0068] 311. Installation components

[0069] 3111, Mounting Plate

[0070] 312. Grid

[0071] 313. Card hole

[0072] 314. Connecting part

[0073] 320. Isolation Seat

[0074] 600. Push rod components

[0075] 710. Exciter

[0076] D1, First Direction

[0077] D2, Second Direction

[0078] D3. Third direction Detailed Implementation

[0079] 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.

[0080] 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.

[0081] like Figure 1 and Figure 2 As 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 disposed relative to the contact cavity 100, for example, the stationary contacts 210 are fixedly mounted on the contact cavity 100. 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 disposed within the portion of the push rod member 600 located within the contact chamber 101. The arc extinguishing assembly 300 is disposed in the contact chamber 101 and is used to extinguish the arc generated by the moving contact 220 and the stationary contact 210 during contact and separation.

[0082] In one embodiment, all of the stationary contact 210 are located on the same side of the moving contact 220.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] like Figure 1 and Figure 2 As 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.

[0088] 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.

[0089] like Figure 2 As shown, 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, so as to flow toward the arc extinguishing assembly 300.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] like Figure 2 and Figure 3 As shown, each stationary contact 210 includes a stationary component 211 and a conductive component 212. The stationary component 211 is mounted on the top of the ceramic cover 111. In the contact assembly 200, the conductive components 212 of the two stationary contacts 210 are respectively connected to the stationary components 211 of the two stationary contacts 210. The conductive components 212 are used to contact or separate from the moving contact 220. The conductive component 212 has a first arc-shaped portion 214.

[0094] The conductive element 212 also includes a connecting portion 213 and a contact portion 215. The contact portion 215 has a stationary contact. The connecting portion 213 is connected to the stationary component 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 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 component 600 and the yoke plate 130.

[0095] like Figure 2 As shown, the portion of the stationary component 211 that extends out of the outer surface of the contact cavity 100 is the exposed portion 211b, the shortest distance between the two exposed portions 211b is L1, and the shortest distance between the two contact portions 215 included in the contact assembly 200 is L3, where L3≤L1.

[0096] In this embodiment, by providing a conductive element 212 with contact portions 215, since L3≤L1, the two conductive elements 212 extend approximately in a direction close to each other. This not only allows for arc guiding using the first arc guiding portion 214, but also maximizes the distance between the two exposed portions 211b while ensuring the distance between the contact portions 215 of the two conductive elements 212 remains constant. Thus, while maintaining electrical distance, other components, such as auxiliary monitoring contacts or exciters, can be arranged in the space between the two stationary components 211. Figure 2 As shown, the arc extinguishing component 300 is located on the side of the stationary contact 210 facing the moving contact 220.

[0097] 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.

[0098] 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.

[0099] 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 contact members 210 of the contact assembly 200 facing the yoke plate 130. Further, the two paired arc-extinguishing grid assemblies 310 are respectively located on the side of the connecting portion 213 of the two stationary contact members 210 of the contact assembly 200 facing the yoke plate 130.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] When the conductive element 212 is connected to the bottom of the stationary element 211, the connecting part 213 of the conductive element 212 can be located between the arc extinguishing grid assembly 310 and the stationary element 211.

[0108] like Figure 2 As shown, the shortest distance between the two exposed portions 211b is L1, and the shortest distance between the two paired arc-extinguishing grid components 310 is L2, where L2≤L1.

[0109] 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.

[0110] Please continue reading. Figure 2In one embodiment, the portion of the stationary component 211 that extends into the contact cavity 100 is an 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.

[0111] 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.

[0112] The connecting portion 213 of the conductive member 212 can be connected to the insertion portion 211a.

[0113] like Figure 2 As shown, in one embodiment, the shortest distance between the two insertion portions 211a is L5, where L5 > L3.

[0114] 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.

[0115] In one implementation, L1 < L5.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] like Figure 8 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:

[0123] The contact assembly 200 also includes a second arc guide portion 230, which is connected to the moving contact 220 and is arranged at an angle relative to the moving contact 220. The second arc guide portion 230 is configured to guide the arc flow to the arc extinguishing grid assembly 310.

[0124] 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.

[0125] In one embodiment, the second guide arc portion 230 is integrally connected with the moving contact member 220.

[0126] 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.

[0127] 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.

[0128] like Figure 8 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.

[0129] like Figure 8 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 is close to the end of the arc extinguishing grid assembly 310 near the yoke plate 130.

[0130] 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.

[0131] like Figure 8 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.

[0132] 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.

[0133] Please continue reading. Figure 8 The relay in this embodiment further includes an exciter 710, which is mounted on top of the ceramic cover 111 of the contact cavity 100. At least a portion of the exciter 710 is located within the contact cavity 101, and the exciter 710 is located on the side of the moving contact 220 facing away from the yoke plate 130. The exciter 710 is configured to release an impactor into the contact cavity 101 in response to an excitation signal. The impactor can switch the moving contact 220 from a state of being connected to the stationary contact 210 to a state of being disconnected from the stationary contact 210.

[0134] In this embodiment, the relay is equipped with an exciter 710. When an excitation signal is generated, the exciter 710 is activated, thereby releasing an impactor into the contact chamber 101. The impactor causes the moving contact 220 to switch from a state of being connected to the stationary contact 210 to a state of being disconnected from the stationary contact 210. In this way, the exciter 710 acts as a "fuse," enabling the relay to disconnect promptly when an excitation signal is generated, which helps to improve the anti-sticking properties of the moving and stationary contacts and achieve rapid arc extinguishing.

[0135] In one embodiment, an excitation signal is generated when a threshold current passes through the moving contact 220.

[0136] As an example, the impactor can be a gaseous or solid substance. When the impactor is a gaseous substance, the exciter 710 can release gas into the contact chamber 101 in response to an excitation signal. The gas can impact the contact 220 to disconnect the relay. When the impactor is a solid substance, the exciter 710 can release an object into the contact chamber 101 in response to an excitation signal. This object can impact the contact 220 to disconnect the relay.

[0137] It should be noted that, regardless of whether the impactor is a gaseous or solid substance, the impactor can directly contact the moving contact 220 or indirectly contact the moving contact 220.

[0138] In one embodiment, when the impactor is a gaseous substance, the igniter 710 may include gunpowder. When the threshold current passes through the moving contact 220, the gunpowder is ignited and generates a large amount of gas, forming a gas impact force. This gas impact force can drive the moving contact 220 to move, thereby disconnecting the relay.

[0139] For example, the exciter 710 can be an electric detonator or an electric detonating tube, but is not limited thereto.

[0140] It should be added that the excitation signal can be determined by whether the current flowing through the moving contact 220 reaches a threshold. Specifically, when the current flowing through the moving contact 220 is greater than or equal to the threshold, the exciter 710 receives an excitation signal; when the current flowing through the moving contact 220 is less than the threshold, the exciter 710 does not receive an excitation signal.

[0141] As an example, the magnitude of the current passing through the moving contact 220 can be monitored by using a Hall effect sensor to monitor the magnetic field strength near the moving contact 220 and the stationary contact 210. Based on the correspondence between magnetic field strength and current value, the current value can be derived from the magnetic field strength.

[0142] Of course, the monitoring of threshold current is not limited to the Hall element mentioned above. For example, it can also be a device that directly monitors the current value passing through the moving contact 220 in the current loop.

[0143] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0144] The relay in this embodiment of the application, by providing a first arc-guiding portion 214, allows 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 prolonged arc erosion of the moving and stationary contacts, and improves the electrical durability of the moving and stationary contacts. Furthermore, the first arc-guiding portion 214 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 214, thereby reducing the wear on the contact surface of the moving and stationary contacts, minimizing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0145] Furthermore, by setting conductive element 212, and having stationary contacts on conductive element 212, since L3≤L1, the two conductive elements 212 extend in a direction that is approximately close to each other. This not only allows the first arc-guiding part 214 to guide the arc, but also, while ensuring that the distance between the stationary contacts of the two conductive elements 212 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 components, such as auxiliary monitoring contacts, exciters, etc., can be arranged in the space between the two stationary parts 211.

[0146] 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.

[0147] 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.

[0148] Furthermore, by providing the 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. In addition, 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 loss 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.

[0149] 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.

[0150] Furthermore, the relay is equipped with an exciter 710. When an excitation signal is received, the exciter 710 is activated, thereby releasing an impactor into the contact chamber 101. The impactor causes the moving contact 220 to switch from a state of conduction with the stationary contact 210 to a state of disconnection with the stationary contact 210. In this way, the exciter 710 acts as a "fuse," enabling the relay to disconnect promptly when an excitation signal is received, which helps improve the anti-sticking properties of the moving and stationary contacts and achieves rapid arc extinguishing.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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. as well as At least one set of contact components, the contact components including a movable contact and two stationary contact components, the stationary contact components being fixedly disposed relative to the contact cavity, and the movable contact components being movably disposed within the contact cavity for contacting or separating from the two stationary contact components; The stationary contact has a first arc-shaped portion that is inclined relative to the moving contact. The first arc-shaped portion extends toward the moving contact and is configured to guide the flow of the 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 contact assembly further includes a second arc guide portion connected to the moving contact and arranged at an angle relative to the moving contact, the second arc guide portion being configured to guide the flow of the electric arc.

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 any one of claims 2-4, 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 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 2-4, 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 2-4, 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 2-4, 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.

9. The relay according to any one of claims 1-4, characterized in that, All of the static contacts are located on the same side of the moving contact.

10. The relay according to any one of claims 1-4, characterized in that, The static contact includes a static component and a conductive component. The static component is mounted on the top of the contact cavity, and the conductive component is used to contact or separate from the moving contact. In the contact assembly, the conductive components of the two static contacts are respectively connected to the static components of the two static contacts. The conductive component has the first arc-guided portion.

11. The relay according to claim 10, characterized in that, The conductive component further includes a connecting portion and a contact portion. The connecting portion is connected to the stationary component. One end of the first arc-shaped portion is connected to the connecting portion, and the other end of the first arc-shaped portion is connected to the contact portion. The moving contact component is used to contact or separate from the contact portion.

12. The relay according to claim 11, 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.

13. The relay according to claim 11, 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 portions of the two conductive components is L3, where L3 ≤ L1.

14. The relay according to claim 10, 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 conductive element has a contact portion for contacting or separating from the moving contact, and the shortest distance between two contact portions is L3, where L5 > L3.

15. The relay according to any one of claims 1-4, characterized in that, The relay also includes: An arc-extinguishing assembly, located within the contact chamber, is used to extinguish the electric arc generated by the moving contact and the stationary contact during the contact separation process. The first arc-guiding part is configured to guide the arc flow to the arc-extinguishing component.

16. The relay according to claim 15, characterized in that, The arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two pairs of arc extinguishing grid assemblies located at opposite ends of the moving contact in the length direction.

17. The relay according to claim 16, characterized in that, The static contact includes a static component and a conductive component. The static component is mounted on the contact cavity, and the conductive component is used to contact or separate from the moving contact. In the contact assembly, the conductive components of the two static contacts are respectively connected to the static components of the two static contacts. The conductive component has the first arc-guided portion. 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 two paired arc-extinguishing grid assemblies is L2, where L2 ≤ L1.

18. The relay according to claim 16, characterized in that, The stationary contact includes a stationary component mounted on the contact cavity. The stationary component has an insertion portion that extends into the contact cavity. The farthest distance between the insertion portions of two stationary components is L4, and the shortest distance between a pair of arc-extinguishing grid assemblies is L2, where L4 > L2.

19. The relay according to any one of claims 1-4, characterized in that, The relay further includes an exciter mounted on the contact cavity and configured to release an impactor into the contact cavity in response to an excitation signal. The impactor is capable of switching the moving contact from a state of being connected to the stationary contact to a state of being disconnected from the stationary contact.

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